Message ID | 20240905151707.59101-2-sebastian.reichel@collabora.com |
---|---|
State | New |
Delegated to: | Kever Yang |
Headers | show |
Series | FUSB302 USB-C controller support | expand |
Hi Sebastian, On Thu, 5 Sept 2024 at 21:06, Sebastian Reichel <sebastian.reichel@collabora.com> wrote: > > This adds TCPM framework in preparation for fusb302 support, which can > handle USB power delivery messages. This is needed to solve issues with > devices, that are running from a USB-C port supporting USB-PD, but not > having a battery. > > Such a device currently boots to the kernel without interacting with > the power-supply at all. If there are no USB-PD message replies within > 5 seconds, the power-supply assumes the peripheral is not capable of > USB-PD. It usually takes more than 5 seconds for the system to reach > the kernel and probe the I2C based fusb302 chip driver. Thus the > system always runs into this state. The power-supply's solution to > fix this error state is a hard reset, which involves removing the > power from VBUS. Boards without a battery (or huge capacitors) will > reset at this point resulting in a boot loop. > > This imports the TCPM framework from the kernel. The porting has > originally been done by Rockchip using hardware timers and the Linux > kernel's TCPM code from some years ago. > > I had a look at upgrading to the latest TCPM kernel code, but that > beast became a lot more complex due to adding more USB-C features. > I believe these features are not needed in U-Boot and with multiple > kthreads and hrtimers being involved it is non-trivial to port them. > Instead I worked on stripping down features from the Rockchip port > to an even more basic level. Also the TCPM code has been reworked > to avoid complete use of any timers (Rockchip used SoC specific > hardware timers + IRQ to implement delayed work mechanism). Instead > the delayed state changes are handled directly from the poll loop. > > Note, that (in contrast to the original Rockchip port) the state > machine has the same hard reset quirk, that the kernel has - i.e. > it avoids disabling the CC pin resistors for devices that are not > self-powered. Without that quirk, the Radxa Rock 5B will not just > end up doing a machine reset when a hard reset is triggered, but will > not even recover, because the CPU will loose power and the FUSB302 > will keep this state because of leak voltage arriving through the RX > serial pin (assuming a serial adapter is connected). > > This also includes a 'tcpm' command, which can be used to get > information about the current state and the negotiated voltage > and current. > > Co-developed-by: Wang Jie <dave.wang@rock-chips.com> > Signed-off-by: Wang Jie <dave.wang@rock-chips.com> > Tested-by: Soeren Moch <smoch@web.de> > Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com> For the whole series. Tested-by: Anand Moon <linux.amoon@gmail.com> > --- > Makefile | 1 + > cmd/Kconfig | 7 + > cmd/Makefile | 1 + > cmd/tcpm.c | 136 ++ > doc/usage/cmd/tcpm.rst | 66 + > doc/usage/index.rst | 1 + > drivers/usb/Kconfig | 2 + > drivers/usb/tcpm/Kconfig | 8 + > drivers/usb/tcpm/Makefile | 3 + > drivers/usb/tcpm/tcpm-internal.h | 173 +++ > drivers/usb/tcpm/tcpm-uclass.c | 149 ++ > drivers/usb/tcpm/tcpm.c | 2288 ++++++++++++++++++++++++++++++ > include/dm/uclass-id.h | 1 + > include/usb/pd.h | 516 +++++++ > include/usb/tcpm.h | 99 ++ > 15 files changed, 3451 insertions(+) > create mode 100644 cmd/tcpm.c > create mode 100644 doc/usage/cmd/tcpm.rst > create mode 100644 drivers/usb/tcpm/Kconfig > create mode 100644 drivers/usb/tcpm/Makefile > create mode 100644 drivers/usb/tcpm/tcpm-internal.h > create mode 100644 drivers/usb/tcpm/tcpm-uclass.c > create mode 100644 drivers/usb/tcpm/tcpm.c > create mode 100644 include/usb/pd.h > create mode 100644 include/usb/tcpm.h > > diff --git a/Makefile b/Makefile > index 74df5d177c1f..5a581199c170 100644 > --- a/Makefile > +++ b/Makefile > @@ -879,6 +879,7 @@ libs-y += drivers/usb/musb/ > libs-y += drivers/usb/musb-new/ > libs-y += drivers/usb/isp1760/ > libs-y += drivers/usb/phy/ > +libs-y += drivers/usb/tcpm/ > libs-y += drivers/usb/ulpi/ > ifdef CONFIG_POST > libs-y += post/ > diff --git a/cmd/Kconfig b/cmd/Kconfig > index 978f44eda426..7710bee22ace 100644 > --- a/cmd/Kconfig > +++ b/cmd/Kconfig > @@ -221,6 +221,13 @@ config CMD_REGINFO > help > Register dump > > +config CMD_TCPM > + bool "tcpm" > + depends on TYPEC_TCPM > + help > + Show voltage and current negotiated via USB PD as well as the > + current state of the Type C Port Manager (TCPM) state machine. > + > config CMD_TLV_EEPROM > bool "tlv_eeprom" > depends on I2C_EEPROM > diff --git a/cmd/Makefile b/cmd/Makefile > index 87133cc27a8a..bd0b23ef1013 100644 > --- a/cmd/Makefile > +++ b/cmd/Makefile > @@ -172,6 +172,7 @@ obj-$(CONFIG_CMD_SMBIOS) += smbios.o > obj-$(CONFIG_CMD_SMC) += smccc.o > obj-$(CONFIG_CMD_SYSBOOT) += sysboot.o > obj-$(CONFIG_CMD_STACKPROTECTOR_TEST) += stackprot_test.o > +obj-$(CONFIG_CMD_TCPM) += tcpm.o > obj-$(CONFIG_CMD_TEMPERATURE) += temperature.o > obj-$(CONFIG_CMD_TERMINAL) += terminal.o > obj-$(CONFIG_CMD_TIME) += time.o > diff --git a/cmd/tcpm.c b/cmd/tcpm.c > new file mode 100644 > index 000000000000..962cd234a869 > --- /dev/null > +++ b/cmd/tcpm.c > @@ -0,0 +1,136 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * (C) Copyright 2024 Collabora > + */ > + > +#include <command.h> > +#include <errno.h> > +#include <dm.h> > +#include <dm/uclass-internal.h> > +#include <usb/tcpm.h> > + > +#define LIMIT_DEV 32 > +#define LIMIT_PARENT 20 > + > +static struct udevice *currdev; > + > +static int do_dev(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) > +{ > + char *name; > + int ret = -ENODEV; > + > + switch (argc) { > + case 2: > + name = argv[1]; > + ret = tcpm_get(name, &currdev); > + if (ret) { > + log_err("Can't get TCPM %s: %d (%s)!\n", name, ret, errno_str(ret)); > + return CMD_RET_FAILURE; > + } > + case 1: > + if (!currdev) { > + log_err("TCPM device is not set!\n\n"); > + return CMD_RET_USAGE; > + } > + > + printf("dev: %d @ %s\n", dev_seq(currdev), currdev->name); > + } > + > + return CMD_RET_SUCCESS; > +} > + > +static int do_list(struct cmd_tbl *cmdtp, int flag, int argc, > + char *const argv[]) > +{ > + struct udevice *dev; > + int ret, err = 0; > + > + printf("| %-*.*s| %-*.*s| %s @ %s\n", > + LIMIT_DEV, LIMIT_DEV, "Name", > + LIMIT_PARENT, LIMIT_PARENT, "Parent name", > + "Parent uclass", "seq"); > + > + for (ret = uclass_first_device_check(UCLASS_TCPM, &dev); dev; > + ret = uclass_next_device_check(&dev)) { > + if (ret) > + err = ret; > + > + printf("| %-*.*s| %-*.*s| %s @ %d | status: %i\n", > + LIMIT_DEV, LIMIT_DEV, dev->name, > + LIMIT_PARENT, LIMIT_PARENT, dev->parent->name, > + dev_get_uclass_name(dev->parent), dev_seq(dev->parent), > + ret); > + } > + > + if (err) > + return CMD_RET_FAILURE; > + > + return CMD_RET_SUCCESS; > +} > + > +int do_print_info(struct udevice *dev) > +{ > + enum typec_orientation orientation = tcpm_get_orientation(dev); > + const char *state = tcpm_get_state(dev); > + int pd_rev = tcpm_get_pd_rev(dev); > + int mv = tcpm_get_voltage(dev); > + int ma = tcpm_get_current(dev); > + enum typec_role pwr_role = tcpm_get_pwr_role(dev); > + enum typec_data_role data_role = tcpm_get_data_role(dev); > + bool connected = tcpm_is_connected(dev); > + > + if (!connected) { > + printf("TCPM State: %s\n", state); > + return 0; > + } > + > + printf("Orientation: %s\n", typec_orientation_name[orientation]); > + printf("PD Revision: %s\n", typec_pd_rev_name[pd_rev]); > + printf("Power Role: %s\n", typec_role_name[pwr_role]); > + printf("Data Role: %s\n", typec_data_role_name[data_role]); > + printf("Voltage: %2d.%03d V\n", mv / 1000, mv % 1000); > + printf("Current: %2d.%03d A\n", ma / 1000, ma % 1000); > + > + return 0; > +} > + > +static int do_info(struct cmd_tbl *cmdtp, int flag, int argc, > + char *const argv[]) > +{ > + if (!currdev) { > + printf("First, set the TCPM device!\n"); > + return CMD_RET_USAGE; > + } > + > + return do_print_info(currdev); > +} > + > +static struct cmd_tbl subcmd[] = { > + U_BOOT_CMD_MKENT(dev, 2, 1, do_dev, "", ""), > + U_BOOT_CMD_MKENT(list, 1, 1, do_list, "", ""), > + U_BOOT_CMD_MKENT(info, 1, 1, do_info, "", ""), > +}; > + > +static int do_tcpm(struct cmd_tbl *cmdtp, int flag, int argc, > + char *const argv[]) > +{ > + struct cmd_tbl *cmd; > + > + argc--; > + argv++; > + > + cmd = find_cmd_tbl(argv[0], subcmd, ARRAY_SIZE(subcmd)); > + if (!cmd || argc > cmd->maxargs) > + return CMD_RET_USAGE; > + > + return cmd->cmd(cmdtp, flag, argc, argv); > +} > + > + /**************************************************/ > + > +U_BOOT_CMD(tcpm, CONFIG_SYS_MAXARGS, 1, do_tcpm, > + "TCPM sub-system", > + "list - list TCPM devices\n" > + "tcpm dev [name] - show or [set] operating TCPM device\n" > + "tcpm info - dump information\n" > +); > diff --git a/doc/usage/cmd/tcpm.rst b/doc/usage/cmd/tcpm.rst > new file mode 100644 > index 000000000000..1e8199c0f89c > --- /dev/null > +++ b/doc/usage/cmd/tcpm.rst > @@ -0,0 +1,66 @@ > +.. SPDX-License-Identifier: GPL-2.0+: > + > +.. index:: > + single: tcpm (command) > + > +tcpm command > +============ > + > +Synopsis > +-------- > + > +:: > + > + tcpm dev [devname] > + tcpm info > + tcpm list > + > +Description > +----------- > + > +The tcpm command is used to control USB-PD controllers, also known as TypeC Port Manager (TCPM). > + > +The 'tcpm dev' command shows or set current TCPM device. > + > + devname > + device name to change > + > +The 'tcpm info' command displays the current state of the device > + > +The 'tcpm list' command displays the list available devices. > + > +Examples > +-------- > + > +The 'tcpm info' command displays device's status: > +:: > + > + => tcpm info > + Orientation: normal > + PD Revision: rev3 > + Power Role: sink > + Data Role: device > + Voltage: 20.000 V > + Current: 2.250 A > + > +The current device can be shown or set via 'tcpm dev' command: > +:: > + > + => tcpm dev > + TCPM device is not set! > + => tcpm dev usb-typec@22 > + dev: 0 @ usb-typec@22 > + => tcpm dev > + dev: 0 @ usb-typec@22 > + > +The list of available devices can be shown via 'tcpm list' command: > +:: > + > + => tcpm list > + | Name | Parent name | Parent uclass @ seq > + | usb-typec@22 | i2c@feac0000 | i2c @ 4 | status: 0 > + > +Configuration > +------------- > + > +The tcpm command is only available if CONFIG_CMD_TCPM=y. > diff --git a/doc/usage/index.rst b/doc/usage/index.rst > index 6a218c46b4e4..b4be42f59119 100644 > --- a/doc/usage/index.rst > +++ b/doc/usage/index.rst > @@ -111,6 +111,7 @@ Shell commands > cmd/smbios > cmd/sound > cmd/source > + cmd/tcpm > cmd/temperature > cmd/tftpput > cmd/trace > diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig > index a972d87c7ad4..985d3a9ef7e6 100644 > --- a/drivers/usb/Kconfig > +++ b/drivers/usb/Kconfig > @@ -85,6 +85,8 @@ source "drivers/usb/emul/Kconfig" > > source "drivers/usb/phy/Kconfig" > > +source "drivers/usb/tcpm/Kconfig" > + > source "drivers/usb/ulpi/Kconfig" > > if USB_HOST > diff --git a/drivers/usb/tcpm/Kconfig b/drivers/usb/tcpm/Kconfig > new file mode 100644 > index 000000000000..55bf8e202b90 > --- /dev/null > +++ b/drivers/usb/tcpm/Kconfig > @@ -0,0 +1,8 @@ > +# SPDX-License-Identifier: GPL-2.0 > + > +config TYPEC_TCPM > + tristate "USB Type-C Port Controller Manager" > + depends on DM > + help > + The Type-C Port Controller Manager provides a USB PD and USB Type-C > + state machine for use with Type-C Port Controllers. > diff --git a/drivers/usb/tcpm/Makefile b/drivers/usb/tcpm/Makefile > new file mode 100644 > index 000000000000..a0f76436f3fd > --- /dev/null > +++ b/drivers/usb/tcpm/Makefile > @@ -0,0 +1,3 @@ > +# SPDX-License-Identifier: GPL-2.0 > + > +obj-$(CONFIG_TYPEC_TCPM) += tcpm.o tcpm-uclass.o > diff --git a/drivers/usb/tcpm/tcpm-internal.h b/drivers/usb/tcpm/tcpm-internal.h > new file mode 100644 > index 000000000000..561442090027 > --- /dev/null > +++ b/drivers/usb/tcpm/tcpm-internal.h > @@ -0,0 +1,173 @@ > +/* SPDX-License-Identifier: GPL-2.0-or-later */ > +/* > + * Copyright 2015-2017 Google, Inc > + * Copyright 2024 Collabora > + */ > + > +#ifndef __LINUX_USB_TCPM_INTERNAL_H > +#define __LINUX_USB_TCPM_INTERNAL_H > + > +#define FOREACH_TCPM_STATE(S) \ > + S(INVALID_STATE), \ > + S(TOGGLING), \ > + S(SRC_UNATTACHED), \ > + S(SRC_ATTACH_WAIT), \ > + S(SRC_ATTACHED), \ > + S(SRC_STARTUP), \ > + S(SRC_SEND_CAPABILITIES), \ > + S(SRC_SEND_CAPABILITIES_TIMEOUT), \ > + S(SRC_NEGOTIATE_CAPABILITIES), \ > + S(SRC_TRANSITION_SUPPLY), \ > + S(SRC_READY), \ > + S(SRC_WAIT_NEW_CAPABILITIES), \ > + \ > + S(SNK_UNATTACHED), \ > + S(SNK_ATTACH_WAIT), \ > + S(SNK_DEBOUNCED), \ > + S(SNK_ATTACHED), \ > + S(SNK_STARTUP), \ > + S(SNK_DISCOVERY), \ > + S(SNK_DISCOVERY_DEBOUNCE), \ > + S(SNK_DISCOVERY_DEBOUNCE_DONE), \ > + S(SNK_WAIT_CAPABILITIES), \ > + S(SNK_NEGOTIATE_CAPABILITIES), \ > + S(SNK_TRANSITION_SINK), \ > + S(SNK_TRANSITION_SINK_VBUS), \ > + S(SNK_READY), \ > + \ > + S(HARD_RESET_SEND), \ > + S(HARD_RESET_START), \ > + S(SRC_HARD_RESET_VBUS_OFF), \ > + S(SRC_HARD_RESET_VBUS_ON), \ > + S(SNK_HARD_RESET_SINK_OFF), \ > + S(SNK_HARD_RESET_WAIT_VBUS), \ > + S(SNK_HARD_RESET_SINK_ON), \ > + \ > + S(SOFT_RESET), \ > + S(SOFT_RESET_SEND), \ > + \ > + S(DR_SWAP_ACCEPT), \ > + S(DR_SWAP_CHANGE_DR), \ > + \ > + S(ERROR_RECOVERY), \ > + S(PORT_RESET), \ > + S(PORT_RESET_WAIT_OFF) > + > +#define GENERATE_TCPM_ENUM(e) e > +#define GENERATE_TCPM_STRING(s) #s > +#define TCPM_POLL_EVENT_TIME_OUT 2000 > + > +enum tcpm_state { > + FOREACH_TCPM_STATE(GENERATE_TCPM_ENUM) > +}; > + > +enum pd_msg_request { > + PD_MSG_NONE = 0, > + PD_MSG_CTRL_REJECT, > + PD_MSG_CTRL_WAIT, > + PD_MSG_CTRL_NOT_SUPP, > + PD_MSG_DATA_SINK_CAP, > + PD_MSG_DATA_SOURCE_CAP, > +}; > + > +struct tcpm_port { > + enum typec_port_type typec_type; > + int typec_prefer_role; > + > + enum typec_role vconn_role; > + enum typec_role pwr_role; > + enum typec_data_role data_role; > + > + struct typec_partner *partner; > + > + enum typec_cc_status cc_req; > + enum typec_cc_status cc1; > + enum typec_cc_status cc2; > + enum typec_cc_polarity polarity; > + > + bool attached; > + bool connected; > + int poll_event_cnt; > + enum typec_port_type port_type; > + > + /* > + * Set to true when vbus is greater than VSAFE5V min. > + * Set to false when vbus falls below vSinkDisconnect max threshold. > + */ > + bool vbus_present; > + > + /* > + * Set to true when vbus is less than VSAFE0V max. > + * Set to false when vbus is greater than VSAFE0V max. > + */ > + bool vbus_vsafe0v; > + > + bool vbus_never_low; > + bool vbus_source; > + bool vbus_charge; > + > + int try_role; > + > + enum pd_msg_request queued_message; > + > + enum tcpm_state enter_state; > + enum tcpm_state prev_state; > + enum tcpm_state state; > + enum tcpm_state delayed_state; > + unsigned long delay_ms; > + > + bool state_machine_running; > + > + bool tx_complete; > + enum tcpm_transmit_status tx_status; > + > + unsigned int negotiated_rev; > + unsigned int message_id; > + unsigned int caps_count; > + unsigned int hard_reset_count; > + bool pd_capable; > + bool explicit_contract; > + unsigned int rx_msgid; > + > + /* Partner capabilities/requests */ > + u32 sink_request; > + u32 source_caps[PDO_MAX_OBJECTS]; > + unsigned int nr_source_caps; > + u32 sink_caps[PDO_MAX_OBJECTS]; > + unsigned int nr_sink_caps; > + > + /* > + * whether to wait for the Type-C device to send the DR_SWAP Message flag > + * For Type-C device with Dual-Role Power and Dual-Role Data, the port side > + * is used as sink + ufp, then the tcpm framework needs to wait for Type-C > + * device to initiate DR_swap Message. > + */ > + bool wait_dr_swap_message; > + > + /* Local capabilities */ > + u32 src_pdo[PDO_MAX_OBJECTS]; > + unsigned int nr_src_pdo; > + u32 snk_pdo[PDO_MAX_OBJECTS]; > + unsigned int nr_snk_pdo; > + > + unsigned int operating_snk_mw; > + bool update_sink_caps; > + > + /* Requested current / voltage to the port partner */ > + u32 req_current_limit; > + u32 req_supply_voltage; > + /* Actual current / voltage limit of the local port */ > + u32 current_limit; > + u32 supply_voltage; > + > + /* port belongs to a self powered device */ > + bool self_powered; > + > + unsigned long delay_target; > +}; > + > +extern const char * const tcpm_states[]; > + > +int tcpm_post_probe(struct udevice *dev); > + > +#endif > diff --git a/drivers/usb/tcpm/tcpm-uclass.c b/drivers/usb/tcpm/tcpm-uclass.c > new file mode 100644 > index 000000000000..92f9eff1ada6 > --- /dev/null > +++ b/drivers/usb/tcpm/tcpm-uclass.c > @@ -0,0 +1,149 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * Copyright 2024 Collabora Ltd. > + * > + * USB Power Delivery protocol stack. > + */ > + > +#include <dm/device.h> > +#include <dm/device_compat.h> > +#include <dm/uclass.h> > +#include <linux/err.h> > +#include <usb/tcpm.h> > +#include "tcpm-internal.h" > + > +int tcpm_get_voltage(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + return port->supply_voltage; > +} > + > +int tcpm_get_current(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + return port->current_limit; > +} > + > +enum typec_orientation tcpm_get_orientation(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + switch (port->polarity) { > + case TYPEC_POLARITY_CC1: > + return TYPEC_ORIENTATION_NORMAL; > + case TYPEC_POLARITY_CC2: > + return TYPEC_ORIENTATION_REVERSE; > + default: > + return TYPEC_ORIENTATION_NONE; > + } > +} > + > +const char *tcpm_get_state(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + return tcpm_states[port->state]; > +} > + > +int tcpm_get_pd_rev(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + return port->negotiated_rev; > +} > + > +enum typec_role tcpm_get_pwr_role(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + return port->pwr_role; > +} > + > +enum typec_data_role tcpm_get_data_role(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + return port->data_role; > +} > + > +bool tcpm_is_connected(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + return port->connected; > +} > + > +int tcpm_get(const char *name, struct udevice **devp) > +{ > + return uclass_get_device_by_name(UCLASS_TCPM, name, devp); > +} > + > +static int tcpm_post_bind(struct udevice *dev) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + const char *cap_str; > + ofnode node; > + int ret; > + > + /* > + * USB Power Delivery (USB PD) specification requires, that communication > + * with a sink happens within roughly 5 seconds. Otherwise the source > + * might assume that the sink does not support USB PD. Starting to do > + * USB PD communication after that results in a hard reset, which briefly > + * removes any power from the USB-C port. > + * > + * On systems with alternative power supplies this is not an issue, but > + * systems, which get soleley powered through their USB-C port will end > + * up losing their power supply and doing a board level reset. The hard > + * reset will also restart the 5 second timeout. That means a operating > + * system initializing USB PD will put the system into a boot loop when > + * it takes more than 5 seconds from cold boot to the operating system > + * starting to transmit USB PD messages. > + * > + * The issue can be avoided by doing the initial USB PD communication > + * in U-Boot. The operating system can then re-negotiate by doing a > + * soft reset, which does not trigger removal of the supply voltage. > + * > + * Since the TCPM state machine is quite complex and depending on the > + * remote side can take quite some time to finish, this tries to limit > + * the automatic probing to systems probably relying on power being > + * provided by the USB-C port(s): > + * > + * 1. self-powered devices won't reset when the USB-C port looses power > + * 2. if the power is allowed to go into anything else than sink mode > + * it is not the only power source > + */ > + ret = drvops->get_connector_node(dev, &node); > + if (ret) > + return ret; > + > + if (ofnode_read_bool(node, "self-powered")) > + return 0; > + > + cap_str = ofnode_read_string(node, "power-role"); > + if (!cap_str) > + return -EINVAL; > + > + if (strcmp("sink", cap_str)) > + return 0; > + > + /* Do not auto-probe PD controller when PD is disabled */ > + if (ofnode_read_bool(node, "pd-disable")) > + return 0; > + > + dev_info(dev, "probing Type-C port manager..."); > + > + dev_or_flags(dev, DM_FLAG_PROBE_AFTER_BIND); > + > + return 0; > +} > + > +UCLASS_DRIVER(tcpm) = { > + .id = UCLASS_TCPM, > + .name = "tcpm", > + .per_device_plat_auto = sizeof(struct tcpm_port), > + .post_bind = tcpm_post_bind, > + .post_probe = tcpm_post_probe, > +}; > diff --git a/drivers/usb/tcpm/tcpm.c b/drivers/usb/tcpm/tcpm.c > new file mode 100644 > index 000000000000..0aee57cb2f4a > --- /dev/null > +++ b/drivers/usb/tcpm/tcpm.c > @@ -0,0 +1,2288 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * Copyright 2015-2017 Google, Inc > + * > + * USB Power Delivery protocol stack. > + */ > + > +#include <asm/gpio.h> > +#include <asm/io.h> > +#include <dm.h> > +#include <dm/device_compat.h> > +#include <dm/device-internal.h> > +#include <dm/devres.h> > +#include <linux/compat.h> > +#include <linux/delay.h> > +#include <linux/err.h> > +#include <linux/iopoll.h> > +#include <time.h> > +#include <usb/tcpm.h> > +#include "tcpm-internal.h" > + > +DECLARE_GLOBAL_DATA_PTR; > + > +const char * const tcpm_states[] = { > + FOREACH_TCPM_STATE(GENERATE_TCPM_STRING) > +}; > + > +const char * const typec_pd_rev_name[] = { > + [PD_REV10] = "rev1", > + [PD_REV20] = "rev2", > + [PD_REV30] = "rev3", > +}; > + > +const char * const typec_role_name[] = { > + [TYPEC_SINK] = "sink", > + [TYPEC_SOURCE] = "source", > +}; > + > +const char * const typec_data_role_name[] = { > + [TYPEC_DEVICE] = "device", > + [TYPEC_HOST] = "host", > +}; > + > +const char * const typec_orientation_name[] = { > + [TYPEC_ORIENTATION_NONE] = "none", > + [TYPEC_ORIENTATION_NORMAL] = "normal", > + [TYPEC_ORIENTATION_REVERSE] = "reverse", > +}; > + > +const char * const typec_cc_status_name[] = { > + [TYPEC_CC_OPEN] = "open", > + [TYPEC_CC_RA] = "ra", > + [TYPEC_CC_RD] = "rd", > + [TYPEC_CC_RP_DEF] = "rp-def", > + [TYPEC_CC_RP_1_5] = "rp-1.5", > + [TYPEC_CC_RP_3_0] = "rp-3.0", > +}; > + > +static inline bool tcpm_cc_is_sink(enum typec_cc_status cc) > +{ > + return cc == TYPEC_CC_RP_DEF || > + cc == TYPEC_CC_RP_1_5 || > + cc == TYPEC_CC_RP_3_0; > +} > + > +static inline bool tcpm_port_is_sink(struct tcpm_port *port) > +{ > + bool cc1_is_snk = tcpm_cc_is_sink(port->cc1); > + bool cc2_is_snk = tcpm_cc_is_sink(port->cc2); > + > + return (cc1_is_snk && !cc2_is_snk) || > + (cc2_is_snk && !cc1_is_snk); > +} > + > +static inline bool tcpm_cc_is_source(enum typec_cc_status cc) > +{ > + return cc == TYPEC_CC_RD; > +} > + > +static inline bool tcpm_port_is_source(struct tcpm_port *port) > +{ > + bool cc1_is_src = tcpm_cc_is_source(port->cc1); > + bool cc2_is_src = tcpm_cc_is_source(port->cc2); > + > + return (cc1_is_src && !cc2_is_src) || > + (cc2_is_src && !cc1_is_src); > +} > + > +static inline bool tcpm_try_src(struct tcpm_port *port) > +{ > + return port->try_role == TYPEC_SOURCE && > + port->port_type == TYPEC_PORT_DRP; > +} > + > +static inline void tcpm_reset_event_cnt(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + port->poll_event_cnt = 0; > +} > + > +static enum tcpm_state tcpm_default_state(struct tcpm_port *port) > +{ > + if (port->port_type == TYPEC_PORT_DRP) { > + if (port->try_role == TYPEC_SINK) > + return SNK_UNATTACHED; > + else if (port->try_role == TYPEC_SOURCE) > + return SRC_UNATTACHED; > + } else if (port->port_type == TYPEC_PORT_SNK) { > + return SNK_UNATTACHED; > + } > + return SRC_UNATTACHED; > +} > + > +static bool tcpm_port_is_disconnected(struct tcpm_port *port) > +{ > + return (!port->attached && port->cc1 == TYPEC_CC_OPEN && > + port->cc2 == TYPEC_CC_OPEN) || > + (port->attached && ((port->polarity == TYPEC_POLARITY_CC1 && > + port->cc1 == TYPEC_CC_OPEN) || > + (port->polarity == TYPEC_POLARITY_CC2 && > + port->cc2 == TYPEC_CC_OPEN))); > +} > + > +static void tcpm_set_cc(struct udevice *dev, enum typec_cc_status cc) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + dev_dbg(dev, "TCPM: set cc = %d\n", cc); > + port->cc_req = cc; > + drvops->set_cc(dev, cc); > +} > + > +/* > + * Determine RP value to set based on maximum current supported > + * by a port if configured as source. > + * Returns CC value to report to link partner. > + */ > +static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port) > +{ > + const u32 *src_pdo = port->src_pdo; > + int nr_pdo = port->nr_src_pdo; > + int i; > + > + /* > + * Search for first entry with matching voltage. > + * It should report the maximum supported current. > + */ > + for (i = 0; i < nr_pdo; i++) { > + const u32 pdo = src_pdo[i]; > + > + if (pdo_type(pdo) == PDO_TYPE_FIXED && > + pdo_fixed_voltage(pdo) == 5000) { > + unsigned int curr = pdo_max_current(pdo); > + > + if (curr >= 3000) > + return TYPEC_CC_RP_3_0; > + else if (curr >= 1500) > + return TYPEC_CC_RP_1_5; > + return TYPEC_CC_RP_DEF; > + } > + } > + > + return TYPEC_CC_RP_DEF; > +} > + > +static void tcpm_check_and_run_delayed_work(struct udevice *dev); > + > +static bool tcpm_transmit_helper(struct udevice *dev) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + drvops->poll_event(dev); > + udelay(500); > + tcpm_check_and_run_delayed_work(dev); > + return port->tx_complete; > +} > + > +static int tcpm_pd_transmit(struct udevice *dev, > + enum tcpm_transmit_type type, > + const struct pd_message *msg) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + u32 timeout_us = PD_T_TCPC_TX_TIMEOUT * 1000; > + bool tx_complete; > + int ret; > + > + if (msg) > + dev_dbg(dev, "TCPM: PD TX, header: %#x\n", > + le16_to_cpu(msg->header)); > + else > + dev_dbg(dev, "TCPM: PD TX, type: %#x\n", type); > + > + port->tx_complete = false; > + ret = drvops->pd_transmit(dev, type, msg, port->negotiated_rev); > + if (ret < 0) > + return ret; > + > + /* > + * At this point we basically need to block until the TCPM controller > + * returns successful transmission. Since this is usually done using > + * the generic interrupt status bits, we poll for any events. That > + * will clear the interrupt status, so we also need to process any > + * of the incoming events. This means we will do more processing and > + * thus let's give everything a bit more time. > + */ > + timeout_us *= 5; > + ret = read_poll_timeout(tcpm_transmit_helper, tx_complete, > + !tx_complete, false, timeout_us, dev); > + if (ret < 0) { > + dev_err(dev, "TCPM: PD transmit data failed: %d\n", ret); > + return ret; > + } > + > + switch (port->tx_status) { > + case TCPC_TX_SUCCESS: > + port->message_id = (port->message_id + 1) & PD_HEADER_ID_MASK; > + break; > + case TCPC_TX_DISCARDED: > + ret = -EAGAIN; > + break; > + case TCPC_TX_FAILED: > + default: > + ret = -EIO; > + break; > + } > + > + return ret; > +} > + > +void tcpm_pd_transmit_complete(struct udevice *dev, > + enum tcpm_transmit_status status) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + dev_dbg(dev, "TCPM: PD TX complete, status: %u\n", status); > + tcpm_reset_event_cnt(dev); > + port->tx_status = status; > + port->tx_complete = true; > +} > + > +static int tcpm_set_polarity(struct udevice *dev, > + enum typec_cc_polarity polarity) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + int ret; > + > + dev_dbg(dev, "TCPM: set polarity = %d\n", polarity); > + > + if (drvops->set_polarity) { > + ret = drvops->set_polarity(dev, polarity); > + if (ret < 0) > + return ret; > + } > + > + port->polarity = polarity; > + > + return 0; > +} > + > +static int tcpm_set_vconn(struct udevice *dev, bool enable) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + int ret; > + > + dev_dbg(dev, "TCPM: set vconn = %d\n", enable); > + > + ret = drvops->set_vconn(dev, enable); > + if (!ret) > + port->vconn_role = enable ? TYPEC_SOURCE : TYPEC_SINK; > + > + return ret; > +} > + > +static inline u32 tcpm_get_current_limit(struct tcpm_port *port) > +{ > + switch (port->polarity ? port->cc2 : port->cc1) { > + case TYPEC_CC_RP_1_5: > + return 1500; > + case TYPEC_CC_RP_3_0: > + return 3000; > + case TYPEC_CC_RP_DEF: > + default: > + return 0; > + } > +} > + > +static int tcpm_set_current_limit(struct udevice *dev, u32 max_ma, u32 mv) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + int ret = -EOPNOTSUPP; > + > + dev_info(dev, "TCPM: set voltage limit = %u mV\n", mv); > + dev_info(dev, "TCPM: set current limit = %u mA\n", max_ma); > + > + port->supply_voltage = mv; > + port->current_limit = max_ma; > + > + return ret; > +} > + > +static int tcpm_set_attached_state(struct udevice *dev, bool attached) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + return drvops->set_roles(dev, attached, port->pwr_role, > + port->data_role); > +} > + > +static int tcpm_set_roles(struct udevice *dev, bool attached, > + enum typec_role role, enum typec_data_role data) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + int ret; > + > + ret = drvops->set_roles(dev, attached, role, data); > + if (ret < 0) > + return ret; > + > + port->pwr_role = role; > + port->data_role = data; > + > + return 0; > +} > + > +static int tcpm_pd_send_source_caps(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + struct pd_message msg; > + int i; > + > + memset(&msg, 0, sizeof(msg)); > + > + if (!port->nr_src_pdo) { > + /* No source capabilities defined, sink only */ > + msg.header = PD_HEADER_LE(PD_CTRL_REJECT, > + port->pwr_role, > + port->data_role, > + port->negotiated_rev, > + port->message_id, 0); > + } else { > + msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP, > + port->pwr_role, > + port->data_role, > + port->negotiated_rev, > + port->message_id, > + port->nr_src_pdo); > + } > + > + for (i = 0; i < port->nr_src_pdo; i++) > + msg.payload[i] = cpu_to_le32(port->src_pdo[i]); > + > + return tcpm_pd_transmit(dev, TCPC_TX_SOP, &msg); > +} > + > +static int tcpm_pd_send_sink_caps(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + struct pd_message msg; > + unsigned int i; > + > + memset(&msg, 0, sizeof(msg)); > + > + if (!port->nr_snk_pdo) { > + /* No sink capabilities defined, source only */ > + msg.header = PD_HEADER_LE(PD_CTRL_REJECT, > + port->pwr_role, > + port->data_role, > + port->negotiated_rev, > + port->message_id, 0); > + } else { > + msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP, > + port->pwr_role, > + port->data_role, > + port->negotiated_rev, > + port->message_id, > + port->nr_snk_pdo); > + } > + > + for (i = 0; i < port->nr_snk_pdo; i++) > + msg.payload[i] = cpu_to_le32(port->snk_pdo[i]); > + > + return tcpm_pd_transmit(dev, TCPC_TX_SOP, &msg); > +} > + > +static void tcpm_state_machine(struct udevice *dev); > + > +static inline void tcpm_timer_uninit(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + port->delay_target = 0; > +} > + > +static void tcpm_timer_init(struct udevice *dev, uint32_t ms) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + unsigned long time_us = ms * 1000; > + > + port->delay_target = timer_get_us() + time_us; > +} > + > +static void tcpm_check_and_run_delayed_work(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + /* no delayed state changes scheduled */ > + if (port->delay_target == 0) > + return; > + > + /* it's not yet time */ > + if (timer_get_us() < port->delay_target) > + return; > + > + tcpm_timer_uninit(dev); > + tcpm_state_machine(dev); > +} > + > +static void mod_tcpm_delayed_work(struct udevice *dev, unsigned int delay_ms) > +{ > + if (delay_ms) { > + tcpm_timer_init(dev, delay_ms); > + } else { > + tcpm_timer_uninit(dev); > + tcpm_state_machine(dev); > + } > +} > + > +static void tcpm_set_state(struct udevice *dev, enum tcpm_state state, > + unsigned int delay_ms) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + if (delay_ms) { > + dev_dbg(dev, "TCPM: pending state change %s -> %s @ %u ms [%s]\n", > + tcpm_states[port->state], tcpm_states[state], delay_ms, > + typec_pd_rev_name[port->negotiated_rev]); > + port->delayed_state = state; > + mod_tcpm_delayed_work(dev, delay_ms); > + port->delay_ms = delay_ms; > + } else { > + dev_dbg(dev, "TCPM: state change %s -> %s\n", > + tcpm_states[port->state], tcpm_states[state]); > + port->delayed_state = INVALID_STATE; > + port->prev_state = port->state; > + port->state = state; > + /* > + * Don't re-queue the state machine work item if we're currently > + * in the state machine and we're immediately changing states. > + * tcpm_state_machine_work() will continue running the state > + * machine. > + */ > + if (!port->state_machine_running) > + mod_tcpm_delayed_work(dev, 0); > + } > +} > + > +static void tcpm_set_state_cond(struct udevice *dev, enum tcpm_state state, > + unsigned int delay_ms) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + if (port->enter_state == port->state) > + tcpm_set_state(dev, state, delay_ms); > + else > + dev_dbg(dev, "TCPM: skipped %sstate change %s -> %s [%u ms], context state %s [%s]\n", > + delay_ms ? "delayed " : "", > + tcpm_states[port->state], tcpm_states[state], > + delay_ms, tcpm_states[port->enter_state], > + typec_pd_rev_name[port->negotiated_rev]); > +} > + > +static void tcpm_queue_message(struct udevice *dev, > + enum pd_msg_request message) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + port->queued_message = message; > + mod_tcpm_delayed_work(dev, 0); > +} > + > +enum pdo_err { > + PDO_NO_ERR, > + PDO_ERR_NO_VSAFE5V, > + PDO_ERR_VSAFE5V_NOT_FIRST, > + PDO_ERR_PDO_TYPE_NOT_IN_ORDER, > + PDO_ERR_FIXED_NOT_SORTED, > + PDO_ERR_VARIABLE_BATT_NOT_SORTED, > + PDO_ERR_DUPE_PDO, > + PDO_ERR_PPS_APDO_NOT_SORTED, > + PDO_ERR_DUPE_PPS_APDO, > +}; > + > +static const char * const pdo_err_msg[] = { > + [PDO_ERR_NO_VSAFE5V] = > + " err: source/sink caps should at least have vSafe5V", > + [PDO_ERR_VSAFE5V_NOT_FIRST] = > + " err: vSafe5V Fixed Supply Object Shall always be the first object", > + [PDO_ERR_PDO_TYPE_NOT_IN_ORDER] = > + " err: PDOs should be in the following order: Fixed; Battery; Variable", > + [PDO_ERR_FIXED_NOT_SORTED] = > + " err: Fixed supply pdos should be in increasing order of their fixed voltage", > + [PDO_ERR_VARIABLE_BATT_NOT_SORTED] = > + " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage", > + [PDO_ERR_DUPE_PDO] = > + " err: Variable/Batt supply pdos cannot have same min/max voltage", > + [PDO_ERR_PPS_APDO_NOT_SORTED] = > + " err: Programmable power supply apdos should be in increasing order of their maximum voltage", > + [PDO_ERR_DUPE_PPS_APDO] = > + " err: Programmable power supply apdos cannot have same min/max voltage and max current", > +}; > + > +static enum pdo_err tcpm_caps_err(struct udevice *dev, const u32 *pdo, > + unsigned int nr_pdo) > +{ > + unsigned int i; > + > + /* Should at least contain vSafe5v */ > + if (nr_pdo < 1) > + return PDO_ERR_NO_VSAFE5V; > + > + /* The vSafe5V Fixed Supply Object Shall always be the first object */ > + if (pdo_type(pdo[0]) != PDO_TYPE_FIXED || > + pdo_fixed_voltage(pdo[0]) != VSAFE5V) > + return PDO_ERR_VSAFE5V_NOT_FIRST; > + > + for (i = 1; i < nr_pdo; i++) { > + if (pdo_type(pdo[i]) < pdo_type(pdo[i - 1])) { > + return PDO_ERR_PDO_TYPE_NOT_IN_ORDER; > + } else if (pdo_type(pdo[i]) == pdo_type(pdo[i - 1])) { > + enum pd_pdo_type type = pdo_type(pdo[i]); > + > + switch (type) { > + /* > + * The remaining Fixed Supply Objects, if > + * present, shall be sent in voltage order; > + * lowest to highest. > + */ > + case PDO_TYPE_FIXED: > + if (pdo_fixed_voltage(pdo[i]) <= > + pdo_fixed_voltage(pdo[i - 1])) > + return PDO_ERR_FIXED_NOT_SORTED; > + break; > + /* > + * The Battery Supply Objects and Variable > + * supply, if present shall be sent in Minimum > + * Voltage order; lowest to highest. > + */ > + case PDO_TYPE_VAR: > + case PDO_TYPE_BATT: > + if (pdo_min_voltage(pdo[i]) < > + pdo_min_voltage(pdo[i - 1])) > + return PDO_ERR_VARIABLE_BATT_NOT_SORTED; > + else if ((pdo_min_voltage(pdo[i]) == > + pdo_min_voltage(pdo[i - 1])) && > + (pdo_max_voltage(pdo[i]) == > + pdo_max_voltage(pdo[i - 1]))) > + return PDO_ERR_DUPE_PDO; > + break; > + /* > + * The Programmable Power Supply APDOs, if present, > + * shall be sent in Maximum Voltage order; > + * lowest to highest. > + */ > + case PDO_TYPE_APDO: > + if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS) > + break; > + > + if (pdo_pps_apdo_max_voltage(pdo[i]) < > + pdo_pps_apdo_max_voltage(pdo[i - 1])) > + return PDO_ERR_PPS_APDO_NOT_SORTED; > + else if (pdo_pps_apdo_min_voltage(pdo[i]) == > + pdo_pps_apdo_min_voltage(pdo[i - 1]) && > + pdo_pps_apdo_max_voltage(pdo[i]) == > + pdo_pps_apdo_max_voltage(pdo[i - 1]) && > + pdo_pps_apdo_max_current(pdo[i]) == > + pdo_pps_apdo_max_current(pdo[i - 1])) > + return PDO_ERR_DUPE_PPS_APDO; > + break; > + default: > + dev_err(dev, "TCPM: Unknown pdo type\n"); > + } > + } > + } > + > + return PDO_NO_ERR; > +} > + > +static int tcpm_validate_caps(struct udevice *dev, const u32 *pdo, > + unsigned int nr_pdo) > +{ > + enum pdo_err err_index = tcpm_caps_err(dev, pdo, nr_pdo); > + > + if (err_index != PDO_NO_ERR) { > + dev_err(dev, "TCPM:%s\n", pdo_err_msg[err_index]); > + return -EINVAL; > + } > + > + return 0; > +} > + > +/* > + * PD (data, control) command handling functions > + */ > +static inline enum tcpm_state ready_state(struct tcpm_port *port) > +{ > + if (port->pwr_role == TYPEC_SOURCE) > + return SRC_READY; > + else > + return SNK_READY; > +} > + > +static void tcpm_pd_data_request(struct udevice *dev, > + const struct pd_message *msg) > +{ > + enum pd_data_msg_type type = pd_header_type_le(msg->header); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + unsigned int cnt = pd_header_cnt_le(msg->header); > + unsigned int rev = pd_header_rev_le(msg->header); > + unsigned int i; > + > + switch (type) { > + case PD_DATA_SOURCE_CAP: > + for (i = 0; i < cnt; i++) > + port->source_caps[i] = le32_to_cpu(msg->payload[i]); > + > + port->nr_source_caps = cnt; > + > + tcpm_validate_caps(dev, port->source_caps, > + port->nr_source_caps); > + > + /* > + * Adjust revision in subsequent message headers, as required, > + * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't > + * support Rev 1.0 so just do nothing in that scenario. > + */ > + if (rev == PD_REV10) > + break; > + > + if (rev < PD_MAX_REV) > + port->negotiated_rev = rev; > + > + if ((pdo_type(port->source_caps[0]) == PDO_TYPE_FIXED) && > + (port->source_caps[0] & PDO_FIXED_DUAL_ROLE) && > + (port->source_caps[0] & PDO_FIXED_DATA_SWAP)) { > + /* Dual role power and data, eg: self-powered Type-C */ > + port->wait_dr_swap_message = true; > + } else { > + /* Non-Dual role power, eg: adapter */ > + port->wait_dr_swap_message = false; > + } > + > + /* > + * This message may be received even if VBUS is not > + * present. This is quite unexpected; see USB PD > + * specification, sections 8.3.3.6.3.1 and 8.3.3.6.3.2. > + * However, at the same time, we must be ready to > + * receive this message and respond to it 15ms after > + * receiving PS_RDY during power swap operations, no matter > + * if VBUS is available or not (USB PD specification, > + * section 6.5.9.2). > + * So we need to accept the message either way, > + * but be prepared to keep waiting for VBUS after it was > + * handled. > + */ > + tcpm_set_state(dev, SNK_NEGOTIATE_CAPABILITIES, 0); > + break; > + case PD_DATA_REQUEST: > + /* > + * Adjust revision in subsequent message headers, as required, > + * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't > + * support Rev 1.0 so just reject in that scenario. > + */ > + if (rev == PD_REV10) { > + tcpm_queue_message(dev, PD_MSG_CTRL_REJECT); > + break; > + } > + > + if (rev < PD_MAX_REV) > + port->negotiated_rev = rev; > + > + port->sink_request = le32_to_cpu(msg->payload[0]); > + > + tcpm_set_state(dev, SRC_NEGOTIATE_CAPABILITIES, 0); > + break; > + case PD_DATA_SINK_CAP: > + /* We don't do anything with this at the moment... */ > + for (i = 0; i < cnt; i++) > + port->sink_caps[i] = le32_to_cpu(msg->payload[i]); > + > + port->nr_sink_caps = cnt; > + break; > + default: > + break; > + } > +} > + > +static void tcpm_pd_ctrl_request(struct udevice *dev, > + const struct pd_message *msg) > +{ > + enum pd_ctrl_msg_type type = pd_header_type_le(msg->header); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + enum tcpm_state next_state; > + > + switch (type) { > + case PD_CTRL_GOOD_CRC: > + case PD_CTRL_PING: > + break; > + case PD_CTRL_GET_SOURCE_CAP: > + switch (port->state) { > + case SRC_READY: > + case SNK_READY: > + tcpm_queue_message(dev, PD_MSG_DATA_SOURCE_CAP); > + break; > + default: > + tcpm_queue_message(dev, PD_MSG_CTRL_REJECT); > + break; > + } > + break; > + case PD_CTRL_GET_SINK_CAP: > + switch (port->state) { > + case SRC_READY: > + case SNK_READY: > + tcpm_queue_message(dev, PD_MSG_DATA_SINK_CAP); > + break; > + default: > + tcpm_queue_message(dev, PD_MSG_CTRL_REJECT); > + break; > + } > + break; > + case PD_CTRL_GOTO_MIN: > + break; > + case PD_CTRL_PS_RDY: > + switch (port->state) { > + case SNK_TRANSITION_SINK: > + if (port->vbus_present) { > + tcpm_set_current_limit(dev, > + port->req_current_limit, > + port->req_supply_voltage); > + port->explicit_contract = true; > + tcpm_set_state(dev, SNK_READY, 0); > + } else { > + /* > + * Seen after power swap. Keep waiting for VBUS > + * in a transitional state. > + */ > + tcpm_set_state(dev, > + SNK_TRANSITION_SINK_VBUS, 0); > + } > + break; > + default: > + break; > + } > + break; > + case PD_CTRL_REJECT: > + case PD_CTRL_WAIT: > + case PD_CTRL_NOT_SUPP: > + switch (port->state) { > + case SNK_NEGOTIATE_CAPABILITIES: > + /* USB PD specification, Figure 8-43 */ > + if (port->explicit_contract) > + next_state = SNK_READY; > + else > + next_state = SNK_WAIT_CAPABILITIES; > + > + tcpm_set_state(dev, next_state, 0); > + break; > + default: > + break; > + } > + break; > + case PD_CTRL_ACCEPT: > + switch (port->state) { > + case SNK_NEGOTIATE_CAPABILITIES: > + tcpm_set_state(dev, SNK_TRANSITION_SINK, 0); > + break; > + case SOFT_RESET_SEND: > + port->message_id = 0; > + port->rx_msgid = -1; > + if (port->pwr_role == TYPEC_SOURCE) > + next_state = SRC_SEND_CAPABILITIES; > + else > + next_state = SNK_WAIT_CAPABILITIES; > + tcpm_set_state(dev, next_state, 0); > + break; > + default: > + break; > + } > + break; > + case PD_CTRL_SOFT_RESET: > + tcpm_set_state(dev, SOFT_RESET, 0); > + break; > + case PD_CTRL_DR_SWAP: > + if (port->port_type != TYPEC_PORT_DRP) { > + tcpm_queue_message(dev, PD_MSG_CTRL_REJECT); > + break; > + } > + /* > + * 6.3.9: If an alternate mode is active, a request to swap > + * alternate modes shall trigger a port reset. > + */ > + switch (port->state) { > + case SRC_READY: > + case SNK_READY: > + tcpm_set_state(dev, DR_SWAP_ACCEPT, 0); > + break; > + default: > + tcpm_queue_message(dev, PD_MSG_CTRL_WAIT); > + break; > + } > + break; > + case PD_CTRL_PR_SWAP: > + case PD_CTRL_VCONN_SWAP: > + case PD_CTRL_GET_SOURCE_CAP_EXT: > + case PD_CTRL_GET_STATUS: > + case PD_CTRL_FR_SWAP: > + case PD_CTRL_GET_PPS_STATUS: > + case PD_CTRL_GET_COUNTRY_CODES: > + /* Currently not supported */ > + dev_err(dev, "TCPM: Currently not supported type %#x\n", type); > + tcpm_queue_message(dev, PD_MSG_CTRL_NOT_SUPP); > + break; > + default: > + dev_err(dev, "TCPM: Unrecognized ctrl message type %#x\n", type); > + break; > + } > +} > + > +static void tcpm_pd_rx_handler(struct udevice *dev, > + const struct pd_message *msg) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + unsigned int cnt = pd_header_cnt_le(msg->header); > + bool remote_is_host, local_is_host; > + > + dev_dbg(dev, "TCPM: PD RX, header: %#x [%d]\n", > + le16_to_cpu(msg->header), port->attached); > + > + if (port->attached) { > + enum pd_ctrl_msg_type type = pd_header_type_le(msg->header); > + unsigned int msgid = pd_header_msgid_le(msg->header); > + > + /* > + * USB PD standard, 6.6.1.2: > + * "... if MessageID value in a received Message is the > + * same as the stored value, the receiver shall return a > + * GoodCRC Message with that MessageID value and drop > + * the Message (this is a retry of an already received > + * Message). Note: this shall not apply to the Soft_Reset > + * Message which always has a MessageID value of zero." > + */ > + if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET) > + return; > + port->rx_msgid = msgid; > + > + /* > + * If both ends believe to be DFP/host, we have a data role > + * mismatch. > + */ > + remote_is_host = !!(le16_to_cpu(msg->header) & PD_HEADER_DATA_ROLE); > + local_is_host = port->data_role == TYPEC_HOST; > + if (remote_is_host == local_is_host) { > + dev_err(dev, "TCPM: data role mismatch, initiating error recovery\n"); > + tcpm_set_state(dev, ERROR_RECOVERY, 0); > + } else { > + if (cnt) > + tcpm_pd_data_request(dev, msg); > + else > + tcpm_pd_ctrl_request(dev, msg); > + } > + } > +} > + > +void tcpm_pd_receive(struct udevice *dev, const struct pd_message *msg) > +{ > + tcpm_reset_event_cnt(dev); > + tcpm_pd_rx_handler(dev, msg); > +} > + > +static int tcpm_pd_send_control(struct udevice *dev, > + enum pd_ctrl_msg_type type) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + struct pd_message msg; > + > + memset(&msg, 0, sizeof(msg)); > + msg.header = PD_HEADER_LE(type, port->pwr_role, > + port->data_role, > + port->negotiated_rev, > + port->message_id, 0); > + > + return tcpm_pd_transmit(dev, TCPC_TX_SOP, &msg); > +} > + > +/* > + * Send queued message without affecting state. > + * Return true if state machine should go back to sleep, > + * false otherwise. > + */ > +static bool tcpm_send_queued_message(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + enum pd_msg_request queued_message; > + int max_messages = 100; > + > + do { > + queued_message = port->queued_message; > + port->queued_message = PD_MSG_NONE; > + max_messages--; > + > + switch (queued_message) { > + case PD_MSG_CTRL_WAIT: > + tcpm_pd_send_control(dev, PD_CTRL_WAIT); > + break; > + case PD_MSG_CTRL_REJECT: > + tcpm_pd_send_control(dev, PD_CTRL_REJECT); > + break; > + case PD_MSG_CTRL_NOT_SUPP: > + tcpm_pd_send_control(dev, PD_CTRL_NOT_SUPP); > + break; > + case PD_MSG_DATA_SINK_CAP: > + tcpm_pd_send_sink_caps(dev); > + break; > + case PD_MSG_DATA_SOURCE_CAP: > + tcpm_pd_send_source_caps(dev); > + break; > + default: > + break; > + } > + } while (max_messages > 0 && port->queued_message != PD_MSG_NONE); > + > + if (!max_messages) > + dev_err(dev, "Aborted sending of too many queued messages\n"); > + > + return false; > +} > + > +static int tcpm_pd_check_request(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + u32 pdo, rdo = port->sink_request; > + unsigned int max, op, pdo_max, index; > + enum pd_pdo_type type; > + > + index = rdo_index(rdo); > + if (!index || index > port->nr_src_pdo) > + return -EINVAL; > + > + pdo = port->src_pdo[index - 1]; > + type = pdo_type(pdo); > + switch (type) { > + case PDO_TYPE_FIXED: > + case PDO_TYPE_VAR: > + max = rdo_max_current(rdo); > + op = rdo_op_current(rdo); > + pdo_max = pdo_max_current(pdo); > + > + if (op > pdo_max) > + return -EINVAL; > + if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH)) > + return -EINVAL; > + > + if (type == PDO_TYPE_FIXED) > + dev_dbg(dev, "TCPM: Requested %u mV, %u mA for %u / %u mA\n", > + pdo_fixed_voltage(pdo), pdo_max, op, max); > + else > + dev_dbg(dev, "TCPM: Requested %u -> %u mV, %u mA for %u / %u mA\n", > + pdo_min_voltage(pdo), pdo_max_voltage(pdo), > + pdo_max, op, max); > + break; > + case PDO_TYPE_BATT: > + max = rdo_max_power(rdo); > + op = rdo_op_power(rdo); > + pdo_max = pdo_max_power(pdo); > + > + if (op > pdo_max) > + return -EINVAL; > + if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH)) > + return -EINVAL; > + dev_info(dev, "TCPM: Requested %u -> %u mV, %u mW for %u / %u mW\n", > + pdo_min_voltage(pdo), pdo_max_voltage(pdo), > + pdo_max, op, max); > + break; > + default: > + return -EINVAL; > + } > + > + return 0; > +} > + > +#define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y)) > +#define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y)) > + > +static int tcpm_pd_select_pdo(struct udevice *dev, int *sink_pdo, > + int *src_pdo) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0, > + max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0, > + min_snk_mv = 0; > + int ret = -EINVAL; > + > + /* > + * Select the source PDO providing the most power which has a > + * matchig sink cap. > + */ > + for (i = 0; i < port->nr_source_caps; i++) { > + u32 pdo = port->source_caps[i]; > + enum pd_pdo_type type = pdo_type(pdo); > + > + switch (type) { > + case PDO_TYPE_FIXED: > + max_src_mv = pdo_fixed_voltage(pdo); > + min_src_mv = max_src_mv; > + break; > + case PDO_TYPE_BATT: > + case PDO_TYPE_VAR: > + max_src_mv = pdo_max_voltage(pdo); > + min_src_mv = pdo_min_voltage(pdo); > + break; > + case PDO_TYPE_APDO: > + continue; > + default: > + dev_err(dev, "TCPM: Invalid source PDO type, ignoring\n"); > + continue; > + } > + > + switch (type) { > + case PDO_TYPE_FIXED: > + case PDO_TYPE_VAR: > + src_ma = pdo_max_current(pdo); > + src_mw = src_ma * min_src_mv / 1000; > + break; > + case PDO_TYPE_BATT: > + src_mw = pdo_max_power(pdo); > + break; > + case PDO_TYPE_APDO: > + continue; > + default: > + dev_err(dev, "TCPM: Invalid source PDO type, ignoring\n"); > + continue; > + } > + > + for (j = 0; j < port->nr_snk_pdo; j++) { > + pdo = port->snk_pdo[j]; > + > + switch (pdo_type(pdo)) { > + case PDO_TYPE_FIXED: > + max_snk_mv = pdo_fixed_voltage(pdo); > + min_snk_mv = max_snk_mv; > + break; > + case PDO_TYPE_BATT: > + case PDO_TYPE_VAR: > + max_snk_mv = pdo_max_voltage(pdo); > + min_snk_mv = pdo_min_voltage(pdo); > + break; > + case PDO_TYPE_APDO: > + continue; > + default: > + dev_err(dev, "TCPM: Invalid sink PDO type, ignoring\n"); > + continue; > + } > + > + if (max_src_mv <= max_snk_mv && min_src_mv >= min_snk_mv) { > + /* Prefer higher voltages if available */ > + if ((src_mw == max_mw && min_src_mv > max_mv) || > + src_mw > max_mw) { > + *src_pdo = i; > + *sink_pdo = j; > + max_mw = src_mw; > + max_mv = min_src_mv; > + ret = 0; > + } > + } > + } > + } > + > + return ret; > +} > + > +static int tcpm_pd_build_request(struct udevice *dev, u32 *rdo) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + unsigned int mv, ma, mw, flags; > + unsigned int max_ma, max_mw; > + enum pd_pdo_type type; > + u32 pdo, matching_snk_pdo; > + int src_pdo_index = 0; > + int snk_pdo_index = 0; > + int ret; > + > + ret = tcpm_pd_select_pdo(dev, &snk_pdo_index, &src_pdo_index); > + if (ret < 0) > + return ret; > + > + pdo = port->source_caps[src_pdo_index]; > + matching_snk_pdo = port->snk_pdo[snk_pdo_index]; > + type = pdo_type(pdo); > + > + switch (type) { > + case PDO_TYPE_FIXED: > + mv = pdo_fixed_voltage(pdo); > + break; > + case PDO_TYPE_BATT: > + case PDO_TYPE_VAR: > + mv = pdo_min_voltage(pdo); > + break; > + default: > + dev_err(dev, "TCPM: Invalid PDO selected!\n"); > + return -EINVAL; > + } > + > + /* Select maximum available current within the sink pdo's limit */ > + if (type == PDO_TYPE_BATT) { > + mw = min_power(pdo, matching_snk_pdo); > + ma = 1000 * mw / mv; > + } else { > + ma = min_current(pdo, matching_snk_pdo); > + mw = ma * mv / 1000; > + } > + > + flags = RDO_USB_COMM | RDO_NO_SUSPEND; > + > + /* Set mismatch bit if offered power is less than operating power */ > + max_ma = ma; > + max_mw = mw; > + if (mw < port->operating_snk_mw) { > + flags |= RDO_CAP_MISMATCH; > + if (type == PDO_TYPE_BATT && > + (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo))) > + max_mw = pdo_max_power(matching_snk_pdo); > + else if (pdo_max_current(matching_snk_pdo) > > + pdo_max_current(pdo)) > + max_ma = pdo_max_current(matching_snk_pdo); > + } > + > + dev_dbg(dev, "TCPM: cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d\n", > + port->cc_req, port->cc1, port->cc2, port->vbus_source, > + port->vconn_role == TYPEC_SOURCE ? "source" : "sink", > + port->polarity); > + > + if (type == PDO_TYPE_BATT) { > + *rdo = RDO_BATT(src_pdo_index + 1, mw, max_mw, flags); > + > + dev_info(dev, "TCPM: requesting PDO %d: %u mV, %u mW%s\n", > + src_pdo_index, mv, mw, > + flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); > + } else { > + *rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags); > + > + dev_info(dev, "TCPM: requesting PDO %d: %u mV, %u mA%s\n", > + src_pdo_index, mv, ma, > + flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); > + } > + > + port->req_current_limit = ma; > + port->req_supply_voltage = mv; > + > + return 0; > +} > + > +static int tcpm_pd_send_request(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + struct pd_message msg; > + int ret; > + u32 rdo; > + > + ret = tcpm_pd_build_request(dev, &rdo); > + if (ret < 0) > + return ret; > + > + memset(&msg, 0, sizeof(msg)); > + msg.header = PD_HEADER_LE(PD_DATA_REQUEST, > + port->pwr_role, > + port->data_role, > + port->negotiated_rev, > + port->message_id, 1); > + msg.payload[0] = cpu_to_le32(rdo); > + > + return tcpm_pd_transmit(dev, TCPC_TX_SOP, &msg); > +} > + > +static int tcpm_set_vbus(struct udevice *dev, bool enable) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + int ret; > + > + if (enable && port->vbus_charge) > + return -EINVAL; > + > + dev_dbg(dev, "TCPM: set vbus = %d charge = %d\n", > + enable, port->vbus_charge); > + > + ret = drvops->set_vbus(dev, enable, port->vbus_charge); > + if (ret < 0) > + return ret; > + > + port->vbus_source = enable; > + return 0; > +} > + > +static int tcpm_set_charge(struct udevice *dev, bool charge) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + int ret; > + > + if (charge && port->vbus_source) > + return -EINVAL; > + > + if (charge != port->vbus_charge) { > + dev_dbg(dev, "TCPM: set vbus = %d charge = %d\n", > + port->vbus_source, charge); > + ret = drvops->set_vbus(dev, port->vbus_source, > + charge); > + if (ret < 0) > + return ret; > + } > + port->vbus_charge = charge; > + return 0; > +} > + > +static bool tcpm_start_toggling(struct udevice *dev, enum typec_cc_status cc) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + int ret; > + > + if (!drvops->start_toggling) > + return false; > + > + dev_dbg(dev, "TCPM: Start toggling\n"); > + ret = drvops->start_toggling(dev, port->port_type, cc); > + return ret == 0; > +} > + > +static int tcpm_init_vbus(struct udevice *dev) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + int ret; > + > + ret = drvops->set_vbus(dev, false, false); > + port->vbus_source = false; > + port->vbus_charge = false; > + return ret; > +} > + > +static int tcpm_init_vconn(struct udevice *dev) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + int ret; > + > + ret = drvops->set_vconn(dev, false); > + port->vconn_role = TYPEC_SINK; > + return ret; > +} > + > +static inline void tcpm_typec_connect(struct tcpm_port *port) > +{ > + if (!port->connected) > + port->connected = true; > +} > + > +static int tcpm_src_attach(struct udevice *dev) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + enum typec_cc_polarity polarity = > + port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2 > + : TYPEC_POLARITY_CC1; > + int ret; > + > + if (port->attached) > + return 0; > + > + ret = tcpm_set_polarity(dev, polarity); > + if (ret < 0) > + return ret; > + > + ret = tcpm_set_roles(dev, true, TYPEC_SOURCE, TYPEC_HOST); > + if (ret < 0) > + return ret; > + > + ret = drvops->set_pd_rx(dev, true); > + if (ret < 0) > + goto out_disable_mux; > + > + /* > + * USB Type-C specification, version 1.2, > + * chapter 4.5.2.2.8.1 (Attached.SRC Requirements) > + * Enable VCONN only if the non-RD port is set to RA. > + */ > + if ((polarity == TYPEC_POLARITY_CC1 && port->cc2 == TYPEC_CC_RA) || > + (polarity == TYPEC_POLARITY_CC2 && port->cc1 == TYPEC_CC_RA)) { > + ret = tcpm_set_vconn(dev, true); > + if (ret < 0) > + goto out_disable_pd; > + } > + > + ret = tcpm_set_vbus(dev, true); > + if (ret < 0) > + goto out_disable_vconn; > + > + port->pd_capable = false; > + > + port->partner = NULL; > + > + port->attached = true; > + > + return 0; > + > +out_disable_vconn: > + tcpm_set_vconn(dev, false); > +out_disable_pd: > + drvops->set_pd_rx(dev, false); > +out_disable_mux: > + dev_err(dev, "TCPM: CC connected in %s as DFP\n", > + polarity ? "CC2" : "CC1"); > + return 0; > +} > + > +static inline void tcpm_typec_disconnect(struct tcpm_port *port) > +{ > + if (port->connected) { > + port->partner = NULL; > + port->connected = false; > + } > +} > + > +static void tcpm_reset_port(struct udevice *dev) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + tcpm_timer_uninit(dev); > + tcpm_typec_disconnect(port); > + tcpm_reset_event_cnt(dev); > + port->wait_dr_swap_message = false; > + port->attached = false; > + port->pd_capable = false; > + > + /* > + * First Rx ID should be 0; set this to a sentinel of -1 so that > + * we can check tcpm_pd_rx_handler() if we had seen it before. > + */ > + port->rx_msgid = -1; > + > + drvops->set_pd_rx(dev, false); > + tcpm_init_vbus(dev); /* also disables charging */ > + tcpm_init_vconn(dev); > + tcpm_set_current_limit(dev, 0, 0); > + tcpm_set_polarity(dev, TYPEC_POLARITY_CC1); > + tcpm_set_attached_state(dev, false); > + port->nr_sink_caps = 0; > +} > + > +static void tcpm_detach(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + if (tcpm_port_is_disconnected(port)) > + port->hard_reset_count = 0; > + > + if (!port->attached) > + return; > + > + tcpm_reset_port(dev); > +} > + > +static void tcpm_src_detach(struct udevice *dev) > +{ > + tcpm_detach(dev); > +} > + > +static int tcpm_snk_attach(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + int ret; > + > + if (port->attached) > + return 0; > + > + ret = tcpm_set_polarity(dev, port->cc2 != TYPEC_CC_OPEN ? > + TYPEC_POLARITY_CC2 : TYPEC_POLARITY_CC1); > + if (ret < 0) > + return ret; > + > + ret = tcpm_set_roles(dev, true, TYPEC_SINK, TYPEC_DEVICE); > + if (ret < 0) > + return ret; > + > + port->pd_capable = false; > + > + port->partner = NULL; > + > + port->attached = true; > + dev_info(dev, "TCPM: CC connected in %s as UFP\n", > + port->cc1 != TYPEC_CC_OPEN ? "CC1" : "CC2"); > + > + return 0; > +} > + > +static void tcpm_snk_detach(struct udevice *dev) > +{ > + tcpm_detach(dev); > +} > + > +static inline enum tcpm_state hard_reset_state(struct tcpm_port *port) > +{ > + if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) > + return HARD_RESET_SEND; > + if (port->pd_capable) > + return ERROR_RECOVERY; > + if (port->pwr_role == TYPEC_SOURCE) > + return SRC_UNATTACHED; > + if (port->state == SNK_WAIT_CAPABILITIES) > + return SNK_READY; > + return SNK_UNATTACHED; > +} > + > +static inline enum tcpm_state unattached_state(struct tcpm_port *port) > +{ > + if (port->port_type == TYPEC_PORT_DRP) { > + if (port->pwr_role == TYPEC_SOURCE) > + return SRC_UNATTACHED; > + else > + return SNK_UNATTACHED; > + } else if (port->port_type == TYPEC_PORT_SRC) { > + return SRC_UNATTACHED; > + } > + > + return SNK_UNATTACHED; > +} > + > +static void run_state_machine(struct udevice *dev) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + int ret; > + > + port->enter_state = port->state; > + switch (port->state) { > + case TOGGLING: > + break; > + /* SRC states */ > + case SRC_UNATTACHED: > + tcpm_src_detach(dev); > + if (tcpm_start_toggling(dev, tcpm_rp_cc(port))) { > + tcpm_set_state(dev, TOGGLING, 0); > + break; > + } > + tcpm_set_cc(dev, tcpm_rp_cc(port)); > + if (port->port_type == TYPEC_PORT_DRP) > + tcpm_set_state(dev, SNK_UNATTACHED, PD_T_DRP_SNK); > + break; > + case SRC_ATTACH_WAIT: > + if (tcpm_port_is_source(port)) > + tcpm_set_state(dev, SRC_ATTACHED, PD_T_CC_DEBOUNCE); > + break; > + > + case SRC_ATTACHED: > + ret = tcpm_src_attach(dev); > + /* > + * Currently, vbus control is not implemented, > + * and the SRC detection process cannot be fully implemented. > + */ > + tcpm_set_state(dev, SRC_READY, 0); > + break; > + case SRC_STARTUP: > + port->caps_count = 0; > + port->negotiated_rev = PD_MAX_REV; > + port->message_id = 0; > + port->rx_msgid = -1; > + port->explicit_contract = false; > + tcpm_set_state(dev, SRC_SEND_CAPABILITIES, 0); > + break; > + case SRC_SEND_CAPABILITIES: > + port->caps_count++; > + if (port->caps_count > PD_N_CAPS_COUNT) { > + tcpm_set_state(dev, SRC_READY, 0); > + break; > + } > + ret = tcpm_pd_send_source_caps(dev); > + if (ret < 0) { > + tcpm_set_state(dev, SRC_SEND_CAPABILITIES, > + PD_T_SEND_SOURCE_CAP); > + } else { > + /* > + * Per standard, we should clear the reset counter here. > + * However, that can result in state machine hang-ups. > + * Reset it only in READY state to improve stability. > + */ > + /* port->hard_reset_count = 0; */ > + port->caps_count = 0; > + port->pd_capable = true; > + tcpm_set_state_cond(dev, SRC_SEND_CAPABILITIES_TIMEOUT, > + PD_T_SEND_SOURCE_CAP); > + } > + break; > + case SRC_SEND_CAPABILITIES_TIMEOUT: > + /* > + * Error recovery for a PD_DATA_SOURCE_CAP reply timeout. > + * > + * PD 2.0 sinks are supposed to accept src-capabilities with a > + * 3.0 header and simply ignore any src PDOs which the sink does > + * not understand such as PPS but some 2.0 sinks instead ignore > + * the entire PD_DATA_SOURCE_CAP message, causing contract > + * negotiation to fail. > + * > + * After PD_N_HARD_RESET_COUNT hard-reset attempts, we try > + * sending src-capabilities with a lower PD revision to > + * make these broken sinks work. > + */ > + if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) { > + tcpm_set_state(dev, HARD_RESET_SEND, 0); > + } else if (port->negotiated_rev > PD_REV20) { > + port->negotiated_rev--; > + port->hard_reset_count = 0; > + tcpm_set_state(dev, SRC_SEND_CAPABILITIES, 0); > + } else { > + tcpm_set_state(dev, hard_reset_state(port), 0); > + } > + break; > + case SRC_NEGOTIATE_CAPABILITIES: > + ret = tcpm_pd_check_request(dev); > + if (ret < 0) { > + tcpm_pd_send_control(dev, PD_CTRL_REJECT); > + if (!port->explicit_contract) { > + tcpm_set_state(dev, > + SRC_WAIT_NEW_CAPABILITIES, 0); > + } else { > + tcpm_set_state(dev, SRC_READY, 0); > + } > + } else { > + tcpm_pd_send_control(dev, PD_CTRL_ACCEPT); > + tcpm_set_state(dev, SRC_TRANSITION_SUPPLY, > + PD_T_SRC_TRANSITION); > + } > + break; > + case SRC_TRANSITION_SUPPLY: > + /* XXX: regulator_set_voltage(vbus, ...) */ > + tcpm_pd_send_control(dev, PD_CTRL_PS_RDY); > + port->explicit_contract = true; > + tcpm_set_state_cond(dev, SRC_READY, 0); > + break; > + case SRC_READY: > + port->hard_reset_count = 0; > + > + tcpm_typec_connect(port); > + break; > + case SRC_WAIT_NEW_CAPABILITIES: > + /* Nothing to do... */ > + break; > + > + /* SNK states */ > + case SNK_UNATTACHED: > + tcpm_snk_detach(dev); > + if (tcpm_start_toggling(dev, TYPEC_CC_RD)) { > + tcpm_set_state(dev, TOGGLING, 0); > + break; > + } > + tcpm_set_cc(dev, TYPEC_CC_RD); > + if (port->port_type == TYPEC_PORT_DRP) > + tcpm_set_state(dev, SRC_UNATTACHED, PD_T_DRP_SRC); > + break; > + case SNK_ATTACH_WAIT: > + if ((port->cc1 == TYPEC_CC_OPEN && > + port->cc2 != TYPEC_CC_OPEN) || > + (port->cc1 != TYPEC_CC_OPEN && > + port->cc2 == TYPEC_CC_OPEN)) > + tcpm_set_state(dev, SNK_DEBOUNCED, > + PD_T_CC_DEBOUNCE); > + else if (tcpm_port_is_disconnected(port)) > + tcpm_set_state(dev, SNK_UNATTACHED, > + PD_T_CC_DEBOUNCE); > + break; > + case SNK_DEBOUNCED: > + if (tcpm_port_is_disconnected(port)) > + tcpm_set_state(dev, SNK_UNATTACHED, PD_T_PD_DEBOUNCE); > + else if (port->vbus_present) > + tcpm_set_state(dev, SNK_ATTACHED, 0); > + else > + /* Wait for VBUS, but not forever */ > + tcpm_set_state(dev, PORT_RESET, PD_T_PS_SOURCE_ON); > + break; > + case SNK_ATTACHED: > + ret = tcpm_snk_attach(dev); > + if (ret < 0) > + tcpm_set_state(dev, SNK_UNATTACHED, 0); > + else > + tcpm_set_state(dev, SNK_STARTUP, 0); > + break; > + case SNK_STARTUP: > + port->negotiated_rev = PD_MAX_REV; > + port->message_id = 0; > + port->rx_msgid = -1; > + port->explicit_contract = false; > + tcpm_set_state(dev, SNK_DISCOVERY, 0); > + break; > + case SNK_DISCOVERY: > + if (port->vbus_present) { > + tcpm_set_current_limit(dev, > + tcpm_get_current_limit(port), > + 5000); > + tcpm_set_charge(dev, true); > + tcpm_set_state(dev, SNK_WAIT_CAPABILITIES, 0); > + break; > + } > + /* > + * For DRP, timeouts differ. Also, handling is supposed to be > + * different and much more complex (dead battery detection; > + * see USB power delivery specification, section 8.3.3.6.1.5.1). > + */ > + tcpm_set_state(dev, hard_reset_state(port), > + port->port_type == TYPEC_PORT_DRP ? > + PD_T_DB_DETECT : PD_T_NO_RESPONSE); > + break; > + case SNK_DISCOVERY_DEBOUNCE: > + tcpm_set_state(dev, SNK_DISCOVERY_DEBOUNCE_DONE, > + PD_T_CC_DEBOUNCE); > + break; > + case SNK_DISCOVERY_DEBOUNCE_DONE: > + tcpm_set_state(dev, unattached_state(port), 0); > + break; > + case SNK_WAIT_CAPABILITIES: > + ret = drvops->set_pd_rx(dev, true); > + if (ret < 0) { > + tcpm_set_state(dev, SNK_READY, 0); > + break; > + } > + /* > + * If VBUS has never been low, and we time out waiting > + * for source cap, try a soft reset first, in case we > + * were already in a stable contract before this boot. > + * Do this only once. > + */ > + if (port->vbus_never_low) { > + port->vbus_never_low = false; > + tcpm_set_state(dev, SOFT_RESET_SEND, > + PD_T_SINK_WAIT_CAP); > + } else { > + tcpm_set_state(dev, hard_reset_state(port), > + PD_T_SINK_WAIT_CAP); > + } > + break; > + case SNK_NEGOTIATE_CAPABILITIES: > + port->pd_capable = true; > + port->hard_reset_count = 0; > + ret = tcpm_pd_send_request(dev); > + if (ret < 0) { > + /* Let the Source send capabilities again. */ > + tcpm_set_state(dev, SNK_WAIT_CAPABILITIES, 0); > + } else { > + tcpm_set_state_cond(dev, hard_reset_state(port), > + PD_T_SENDER_RESPONSE); > + } > + break; > + case SNK_TRANSITION_SINK: > + case SNK_TRANSITION_SINK_VBUS: > + tcpm_set_state(dev, hard_reset_state(port), > + PD_T_PS_TRANSITION); > + break; > + case SNK_READY: > + port->update_sink_caps = false; > + tcpm_typec_connect(port); > + /* > + * Here poll_event_cnt is cleared, waiting for self-powered Type-C devices > + * to send DR_swap Messge until 1s (TCPM_POLL_EVENT_TIME_OUT * 500us)timeout > + */ > + if (port->wait_dr_swap_message) > + tcpm_reset_event_cnt(dev); > + > + break; > + > + /* Hard_Reset states */ > + case HARD_RESET_SEND: > + tcpm_pd_transmit(dev, TCPC_TX_HARD_RESET, NULL); > + tcpm_set_state(dev, HARD_RESET_START, 0); > + port->wait_dr_swap_message = false; > + break; > + case HARD_RESET_START: > + port->hard_reset_count++; > + drvops->set_pd_rx(dev, false); > + port->nr_sink_caps = 0; > + if (port->pwr_role == TYPEC_SOURCE) > + tcpm_set_state(dev, SRC_HARD_RESET_VBUS_OFF, > + PD_T_PS_HARD_RESET); > + else > + tcpm_set_state(dev, SNK_HARD_RESET_SINK_OFF, 0); > + break; > + case SRC_HARD_RESET_VBUS_OFF: > + tcpm_set_vconn(dev, true); > + tcpm_set_vbus(dev, false); > + tcpm_set_roles(dev, port->self_powered, TYPEC_SOURCE, > + TYPEC_HOST); > + tcpm_set_state(dev, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER); > + break; > + case SRC_HARD_RESET_VBUS_ON: > + tcpm_set_vconn(dev, true); > + tcpm_set_vbus(dev, true); > + drvops->set_pd_rx(dev, true); > + tcpm_set_attached_state(dev, true); > + tcpm_set_state(dev, SRC_UNATTACHED, PD_T_PS_SOURCE_ON); > + break; > + case SNK_HARD_RESET_SINK_OFF: > + tcpm_set_vconn(dev, false); > + if (port->pd_capable) > + tcpm_set_charge(dev, false); > + tcpm_set_roles(dev, port->self_powered, TYPEC_SINK, > + TYPEC_DEVICE); > + /* > + * VBUS may or may not toggle, depending on the adapter. > + * If it doesn't toggle, transition to SNK_HARD_RESET_SINK_ON > + * directly after timeout. > + */ > + tcpm_set_state(dev, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V); > + break; > + case SNK_HARD_RESET_WAIT_VBUS: > + /* Assume we're disconnected if VBUS doesn't come back. */ > + tcpm_set_state(dev, SNK_UNATTACHED, > + PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON); > + break; > + case SNK_HARD_RESET_SINK_ON: > + /* Note: There is no guarantee that VBUS is on in this state */ > + /* > + * XXX: > + * The specification suggests that dual mode ports in sink > + * mode should transition to state PE_SRC_Transition_to_default. > + * See USB power delivery specification chapter 8.3.3.6.1.3. > + * This would mean to > + * - turn off VCONN, reset power supply > + * - request hardware reset > + * - turn on VCONN > + * - Transition to state PE_Src_Startup > + * SNK only ports shall transition to state Snk_Startup > + * (see chapter 8.3.3.3.8). > + * Similar, dual-mode ports in source mode should transition > + * to PE_SNK_Transition_to_default. > + */ > + if (port->pd_capable) { > + tcpm_set_current_limit(dev, > + tcpm_get_current_limit(port), > + 5000); > + tcpm_set_charge(dev, true); > + } > + tcpm_set_attached_state(dev, true); > + tcpm_set_state(dev, SNK_STARTUP, 0); > + break; > + > + /* Soft_Reset states */ > + case SOFT_RESET: > + port->message_id = 0; > + port->rx_msgid = -1; > + tcpm_pd_send_control(dev, PD_CTRL_ACCEPT); > + if (port->pwr_role == TYPEC_SOURCE) > + tcpm_set_state(dev, SRC_SEND_CAPABILITIES, 0); > + else > + tcpm_set_state(dev, SNK_WAIT_CAPABILITIES, 0); > + break; > + case SOFT_RESET_SEND: > + port->message_id = 0; > + port->rx_msgid = -1; > + if (tcpm_pd_send_control(dev, PD_CTRL_SOFT_RESET)) > + tcpm_set_state_cond(dev, hard_reset_state(port), 0); > + else > + tcpm_set_state_cond(dev, hard_reset_state(port), > + PD_T_SENDER_RESPONSE); > + break; > + > + /* DR_Swap states */ > + case DR_SWAP_ACCEPT: > + tcpm_pd_send_control(dev, PD_CTRL_ACCEPT); > + tcpm_set_state_cond(dev, DR_SWAP_CHANGE_DR, 0); > + break; > + case DR_SWAP_CHANGE_DR: > + if (port->data_role == TYPEC_HOST) { > + tcpm_set_roles(dev, true, port->pwr_role, > + TYPEC_DEVICE); > + } else { > + tcpm_set_roles(dev, true, port->pwr_role, > + TYPEC_HOST); > + } > + /* DR_swap process complete, wait_dr_swap_message is cleared */ > + port->wait_dr_swap_message = false; > + tcpm_set_state(dev, ready_state(port), 0); > + break; > + case ERROR_RECOVERY: > + tcpm_set_state(dev, PORT_RESET, 0); > + break; > + case PORT_RESET: > + tcpm_reset_port(dev); > + if (port->self_powered) > + tcpm_set_cc(dev, TYPEC_CC_OPEN); > + else > + tcpm_set_cc(dev, tcpm_default_state(port) == SNK_UNATTACHED ? > + TYPEC_CC_RD : tcpm_rp_cc(port)); > + tcpm_set_state(dev, PORT_RESET_WAIT_OFF, > + PD_T_ERROR_RECOVERY); > + break; > + case PORT_RESET_WAIT_OFF: > + tcpm_set_state(dev, > + tcpm_default_state(port), > + port->vbus_present ? PD_T_PS_SOURCE_OFF : 0); > + break; > + default: > + dev_err(dev, "TCPM: Unexpected port state %d\n", port->state); > + break; > + } > +} > + > +static void tcpm_state_machine(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + enum tcpm_state prev_state; > + > + mutex_lock(&port->lock); > + port->state_machine_running = true; > + > + if (port->queued_message && tcpm_send_queued_message(dev)) > + goto done; > + > + /* If we were queued due to a delayed state change, update it now */ > + if (port->delayed_state) { > + dev_dbg(dev, "TCPM: state change %s -> %s [delayed %ld ms]\n", > + tcpm_states[port->state], > + tcpm_states[port->delayed_state], port->delay_ms); > + port->prev_state = port->state; > + port->state = port->delayed_state; > + port->delayed_state = INVALID_STATE; > + } > + > + /* > + * Continue running as long as we have (non-delayed) state changes > + * to make. > + */ > + do { > + prev_state = port->state; > + run_state_machine(dev); > + if (port->queued_message) > + tcpm_send_queued_message(dev); > + } while (port->state != prev_state && !port->delayed_state); > + > +done: > + port->state_machine_running = false; > + mutex_unlock(&port->lock); > +} > + > +static void _tcpm_cc_change(struct udevice *dev, enum typec_cc_status cc1, > + enum typec_cc_status cc2) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + enum typec_cc_status old_cc1, old_cc2; > + enum tcpm_state new_state; > + > + old_cc1 = port->cc1; > + old_cc2 = port->cc2; > + port->cc1 = cc1; > + port->cc2 = cc2; > + > + dev_dbg(dev, "TCPM: CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]\n", > + old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state], > + port->polarity, > + tcpm_port_is_disconnected(port) ? "disconnected" : "connected"); > + > + switch (port->state) { > + case TOGGLING: > + if (tcpm_port_is_source(port)) > + tcpm_set_state(dev, SRC_ATTACH_WAIT, 0); > + else if (tcpm_port_is_sink(port)) > + tcpm_set_state(dev, SNK_ATTACH_WAIT, 0); > + break; > + case SRC_UNATTACHED: > + case SRC_ATTACH_WAIT: > + if (tcpm_port_is_disconnected(port)) > + tcpm_set_state(dev, SRC_UNATTACHED, 0); > + else if (cc1 != old_cc1 || cc2 != old_cc2) > + tcpm_set_state(dev, SRC_ATTACH_WAIT, 0); > + break; > + case SRC_ATTACHED: > + case SRC_SEND_CAPABILITIES: > + case SRC_READY: > + if (tcpm_port_is_disconnected(port) || > + !tcpm_port_is_source(port)) > + tcpm_set_state(dev, SRC_UNATTACHED, 0); > + break; > + case SNK_UNATTACHED: > + if (tcpm_port_is_sink(port)) > + tcpm_set_state(dev, SNK_ATTACH_WAIT, 0); > + break; > + case SNK_ATTACH_WAIT: > + if ((port->cc1 == TYPEC_CC_OPEN && > + port->cc2 != TYPEC_CC_OPEN) || > + (port->cc1 != TYPEC_CC_OPEN && > + port->cc2 == TYPEC_CC_OPEN)) > + new_state = SNK_DEBOUNCED; > + else if (tcpm_port_is_disconnected(port)) > + new_state = SNK_UNATTACHED; > + else > + break; > + if (new_state != port->delayed_state) > + tcpm_set_state(dev, SNK_ATTACH_WAIT, 0); > + break; > + case SNK_DEBOUNCED: > + if (tcpm_port_is_disconnected(port)) > + new_state = SNK_UNATTACHED; > + else if (port->vbus_present) > + new_state = tcpm_try_src(port) ? INVALID_STATE : SNK_ATTACHED; > + else > + new_state = SNK_UNATTACHED; > + if (new_state != port->delayed_state) > + tcpm_set_state(dev, SNK_DEBOUNCED, 0); > + break; > + case SNK_READY: > + if (tcpm_port_is_disconnected(port)) > + tcpm_set_state(dev, unattached_state(port), 0); > + else if (!port->pd_capable && > + (cc1 != old_cc1 || cc2 != old_cc2)) > + tcpm_set_current_limit(dev, > + tcpm_get_current_limit(port), > + 5000); > + break; > + > + case SNK_DISCOVERY: > + /* CC line is unstable, wait for debounce */ > + if (tcpm_port_is_disconnected(port)) > + tcpm_set_state(dev, SNK_DISCOVERY_DEBOUNCE, 0); > + break; > + case SNK_DISCOVERY_DEBOUNCE: > + break; > + > + case PORT_RESET: > + case PORT_RESET_WAIT_OFF: > + /* > + * State set back to default mode once the timer completes. > + * Ignore CC changes here. > + */ > + break; > + default: > + /* > + * While acting as sink and auto vbus discharge is enabled, Allow disconnect > + * to be driven by vbus disconnect. > + */ > + if (tcpm_port_is_disconnected(port)) > + tcpm_set_state(dev, unattached_state(port), 0); > + break; > + } > +} > + > +static void _tcpm_pd_vbus_on(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + dev_dbg(dev, "TCPM: VBUS on event\n"); > + port->vbus_present = true; > + /* > + * When vbus_present is true i.e. Voltage at VBUS is greater than VSAFE5V implicitly > + * states that vbus is not at VSAFE0V, hence clear the vbus_vsafe0v flag here. > + */ > + port->vbus_vsafe0v = false; > + > + switch (port->state) { > + case SNK_TRANSITION_SINK_VBUS: > + port->explicit_contract = true; > + tcpm_set_state(dev, SNK_READY, 0); > + break; > + case SNK_DISCOVERY: > + tcpm_set_state(dev, SNK_DISCOVERY, 0); > + break; > + case SNK_DEBOUNCED: > + tcpm_set_state(dev, SNK_ATTACHED, 0); > + break; > + case SNK_HARD_RESET_WAIT_VBUS: > + tcpm_set_state(dev, SNK_HARD_RESET_SINK_ON, 0); > + break; > + case SRC_ATTACHED: > + tcpm_set_state(dev, SRC_STARTUP, 0); > + break; > + case SRC_HARD_RESET_VBUS_ON: > + tcpm_set_state(dev, SRC_STARTUP, 0); > + break; > + > + case PORT_RESET: > + case PORT_RESET_WAIT_OFF: > + /* > + * State set back to default mode once the timer completes. > + * Ignore vbus changes here. > + */ > + break; > + > + default: > + break; > + } > +} > + > +static void _tcpm_pd_vbus_off(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + dev_dbg(dev, "TCPM: VBUS off event\n"); > + port->vbus_present = false; > + port->vbus_never_low = false; > + switch (port->state) { > + case SNK_HARD_RESET_SINK_OFF: > + tcpm_set_state(dev, SNK_HARD_RESET_WAIT_VBUS, 0); > + break; > + case HARD_RESET_SEND: > + break; > + case SNK_ATTACH_WAIT: > + tcpm_set_state(dev, SNK_UNATTACHED, 0); > + break; > + > + case SNK_NEGOTIATE_CAPABILITIES: > + break; > + > + case PORT_RESET_WAIT_OFF: > + tcpm_set_state(dev, tcpm_default_state(port), 0); > + break; > + > + case PORT_RESET: > + /* > + * State set back to default mode once the timer completes. > + * Ignore vbus changes here. > + */ > + break; > + > + default: > + if (port->pwr_role == TYPEC_SINK && port->attached) > + tcpm_set_state(dev, SNK_UNATTACHED, 0); > + break; > + } > +} > + > +void tcpm_cc_change(struct udevice *dev) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + enum typec_cc_status cc1, cc2; > + > + tcpm_reset_event_cnt(dev); > + if (drvops->get_cc(dev, &cc1, &cc2) == 0) > + _tcpm_cc_change(dev, cc1, cc2); > +} > + > +void tcpm_vbus_change(struct udevice *dev) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + bool vbus; > + > + tcpm_reset_event_cnt(dev); > + vbus = drvops->get_vbus(dev); > + if (vbus) > + _tcpm_pd_vbus_on(dev); > + else > + _tcpm_pd_vbus_off(dev); > +} > + > +void tcpm_pd_hard_reset(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + tcpm_reset_event_cnt(dev); > + dev_dbg(dev, "TCPM: Received hard reset\n"); > + > + /* If a hard reset message is received during the port reset process, > + * we should ignore it, that is, do not set port->state to HARD_RESET_START. > + */ > + if (port->state == PORT_RESET || port->state == PORT_RESET_WAIT_OFF) > + return; > + > + /* > + * If we keep receiving hard reset requests, executing the hard reset > + * must have failed. Revert to error recovery if that happens. > + */ > + tcpm_set_state(dev, > + port->hard_reset_count < PD_N_HARD_RESET_COUNT ? > + HARD_RESET_START : ERROR_RECOVERY, > + 0); > +} > + > +static void tcpm_init(struct udevice *dev) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + enum typec_cc_status cc1, cc2; > + > + drvops->init(dev); > + > + tcpm_reset_port(dev); > + > + /* > + * XXX > + * Should possibly wait for VBUS to settle if it was enabled locally > + * since tcpm_reset_port() will disable VBUS. > + */ > + port->vbus_present = drvops->get_vbus(dev); > + if (port->vbus_present) > + port->vbus_never_low = true; > + > + /* > + * 1. When vbus_present is true, voltage on VBUS is already at VSAFE5V. > + * So implicitly vbus_vsafe0v = false. > + * > + * 2. When vbus_present is false and TCPC does NOT support querying > + * vsafe0v status, then, it's best to assume vbus is at VSAFE0V i.e. > + * vbus_vsafe0v is true. > + * > + * 3. When vbus_present is false and TCPC does support querying vsafe0v, > + * then, query tcpc for vsafe0v status. > + */ > + if (port->vbus_present) > + port->vbus_vsafe0v = false; > + else > + port->vbus_vsafe0v = true; > + > + tcpm_set_state(dev, tcpm_default_state(port), 0); > + > + if (drvops->get_cc(dev, &cc1, &cc2) == 0) > + _tcpm_cc_change(dev, cc1, cc2); > +} > + > +static int tcpm_fw_get_caps(struct udevice *dev) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + ofnode node; > + const char *cap_str; > + int ret; > + u32 mw; > + > + ret = drvops->get_connector_node(dev, &node); > + if (ret) > + return ret; > + > + cap_str = ofnode_read_string(node, "power-role"); > + if (!cap_str) > + return -EINVAL; > + > + if (!strcmp("dual", cap_str)) > + port->typec_type = TYPEC_PORT_DRP; > + else if (!strcmp("source", cap_str)) > + port->typec_type = TYPEC_PORT_SRC; > + else if (!strcmp("sink", cap_str)) > + port->typec_type = TYPEC_PORT_SNK; > + else > + return -EINVAL; > + > + port->port_type = port->typec_type; > + > + if (port->port_type == TYPEC_PORT_SNK) > + goto sink; > + > + /* Get source pdos */ > + ret = ofnode_read_size(node, "source-pdos") / sizeof(u32); > + if (ret <= 0) > + return -EINVAL; > + > + port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS); > + ret = ofnode_read_u32_array(node, "source-pdos", > + port->src_pdo, port->nr_src_pdo); > + if (ret || tcpm_validate_caps(dev, port->src_pdo, port->nr_src_pdo)) > + return -EINVAL; > + > + if (port->port_type == TYPEC_PORT_SRC) > + return 0; > + > + /* Get the preferred power role for DRP */ > + cap_str = ofnode_read_string(node, "try-power-role"); > + if (!cap_str) > + return -EINVAL; > + > + if (!strcmp("sink", cap_str)) > + port->typec_prefer_role = TYPEC_SINK; > + else if (!strcmp("source", cap_str)) > + port->typec_prefer_role = TYPEC_SOURCE; > + else > + return -EINVAL; > + > + if (port->typec_prefer_role < 0) > + return -EINVAL; > +sink: > + /* Get sink pdos */ > + ret = ofnode_read_size(node, "sink-pdos") / sizeof(u32); > + if (ret <= 0) > + return -EINVAL; > + > + port->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS); > + ret = ofnode_read_u32_array(node, "sink-pdos", > + port->snk_pdo, port->nr_snk_pdo); > + if (ret || tcpm_validate_caps(dev, port->snk_pdo, port->nr_snk_pdo)) > + return -EINVAL; > + > + if (ofnode_read_u32_array(node, "op-sink-microwatt", &mw, 1)) > + return -EINVAL; > + port->operating_snk_mw = mw / 1000; > + > + port->self_powered = ofnode_read_bool(node, "self-powered"); > + > + return 0; > +} > + > +static int tcpm_port_init(struct udevice *dev) > +{ > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + int err; > + > + err = tcpm_fw_get_caps(dev); > + if (err < 0) { > + dev_err(dev, "TCPM: please check the dts config: %d\n", err); > + return err; > + } > + > + port->try_role = port->typec_prefer_role; > + port->port_type = port->typec_type; > + > + tcpm_init(dev); > + > + dev_info(dev, "TCPM: init finished\n"); > + > + return 0; > +} > + > +static void tcpm_poll_event(struct udevice *dev) > +{ > + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); > + struct tcpm_port *port = dev_get_uclass_plat(dev); > + > + if (!drvops->get_vbus(dev)) > + return; > + > + while (port->poll_event_cnt < TCPM_POLL_EVENT_TIME_OUT) { > + if (!port->wait_dr_swap_message && > + (port->state == SNK_READY || port->state == SRC_READY)) > + break; > + > + drvops->poll_event(dev); > + port->poll_event_cnt++; > + udelay(500); > + tcpm_check_and_run_delayed_work(dev); > + } > + > + if (port->state != SNK_READY && port->state != SRC_READY) > + dev_warn(dev, "TCPM: exit in state %s\n", > + tcpm_states[port->state]); > + > + /* > + * At this time, call the callback function of the respective pd chip > + * to enter the low-power mode. In order to reduce the time spent on > + * the PD chip driver as much as possible, the tcpm framework does not > + * fully process the communication initiated by the device,so it should > + * be noted that we can disable the internal oscillator, etc., but do > + * not turn off the power of the transceiver module, otherwise the > + * self-powered Type-C device will initiate a Message(eg: self-powered > + * Type-C hub initiates a SINK capability request(PD_CTRL_GET_SINK_CAP)) > + * and the pd chip cannot reply to GoodCRC, causing the self-powered Type-C > + * device to switch vbus to vSafe5v, or even turn off vbus. > + */ > + if (!drvops->enter_low_power_mode) > + return; > + > + if (drvops->enter_low_power_mode(dev, port->attached, port->pd_capable)) > + dev_err(dev, "TCPM: failed to enter low power\n"); > + else > + dev_info(dev, "TCPM: PD chip enter low power mode\n"); > +} > + > +int tcpm_post_probe(struct udevice *dev) > +{ > + int ret = tcpm_port_init(dev); > + > + if (ret < 0) { > + dev_err(dev, "failed to tcpm port init\n"); > + return ret; > + } > + > + tcpm_poll_event(dev); > + > + return 0; > +} > diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h > index 5271e646bb16..270088ad94f7 100644 > --- a/include/dm/uclass-id.h > +++ b/include/dm/uclass-id.h > @@ -139,6 +139,7 @@ enum uclass_id { > UCLASS_SYSCON, /* System configuration device */ > UCLASS_SYSINFO, /* Device information from hardware */ > UCLASS_SYSRESET, /* System reset device */ > + UCLASS_TCPM, /* TypeC port manager */ > UCLASS_TEE, /* Trusted Execution Environment device */ > UCLASS_THERMAL, /* Thermal sensor */ > UCLASS_TIMER, /* Timer device */ > diff --git a/include/usb/pd.h b/include/usb/pd.h > new file mode 100644 > index 000000000000..cacda322d7c6 > --- /dev/null > +++ b/include/usb/pd.h > @@ -0,0 +1,516 @@ > +/* SPDX-License-Identifier: GPL-2.0-or-later */ > +/* > + * Copyright 2015-2017 Google, Inc > + */ > + > +#ifndef __LINUX_USB_PD_H > +#define __LINUX_USB_PD_H > + > +#include <linux/kernel.h> > +#include <linux/types.h> > + > +enum typec_port_type { > + TYPEC_PORT_SRC, > + TYPEC_PORT_SNK, > + TYPEC_PORT_DRP, > +}; > + > +enum typec_data_role { > + TYPEC_DEVICE, > + TYPEC_HOST, > +}; > + > +enum typec_role { > + TYPEC_SINK, > + TYPEC_SOURCE, > +}; > + > +/* USB PD Messages */ > +enum pd_ctrl_msg_type { > + /* 0 Reserved */ > + PD_CTRL_GOOD_CRC = 1, > + PD_CTRL_GOTO_MIN = 2, > + PD_CTRL_ACCEPT = 3, > + PD_CTRL_REJECT = 4, > + PD_CTRL_PING = 5, > + PD_CTRL_PS_RDY = 6, > + PD_CTRL_GET_SOURCE_CAP = 7, > + PD_CTRL_GET_SINK_CAP = 8, > + PD_CTRL_DR_SWAP = 9, > + PD_CTRL_PR_SWAP = 10, > + PD_CTRL_VCONN_SWAP = 11, > + PD_CTRL_WAIT = 12, > + PD_CTRL_SOFT_RESET = 13, > + /* 14-15 Reserved */ > + PD_CTRL_NOT_SUPP = 16, > + PD_CTRL_GET_SOURCE_CAP_EXT = 17, > + PD_CTRL_GET_STATUS = 18, > + PD_CTRL_FR_SWAP = 19, > + PD_CTRL_GET_PPS_STATUS = 20, > + PD_CTRL_GET_COUNTRY_CODES = 21, > + /* 22-31 Reserved */ > +}; > + > +enum pd_data_msg_type { > + /* 0 Reserved */ > + PD_DATA_SOURCE_CAP = 1, > + PD_DATA_REQUEST = 2, > + PD_DATA_BIST = 3, > + PD_DATA_SINK_CAP = 4, > + PD_DATA_BATT_STATUS = 5, > + PD_DATA_ALERT = 6, > + PD_DATA_GET_COUNTRY_INFO = 7, > + PD_DATA_ENTER_USB = 8, > + /* 9-14 Reserved */ > + PD_DATA_VENDOR_DEF = 15, > + /* 16-31 Reserved */ > +}; > + > +enum pd_ext_msg_type { > + /* 0 Reserved */ > + PD_EXT_SOURCE_CAP_EXT = 1, > + PD_EXT_STATUS = 2, > + PD_EXT_GET_BATT_CAP = 3, > + PD_EXT_GET_BATT_STATUS = 4, > + PD_EXT_BATT_CAP = 5, > + PD_EXT_GET_MANUFACTURER_INFO = 6, > + PD_EXT_MANUFACTURER_INFO = 7, > + PD_EXT_SECURITY_REQUEST = 8, > + PD_EXT_SECURITY_RESPONSE = 9, > + PD_EXT_FW_UPDATE_REQUEST = 10, > + PD_EXT_FW_UPDATE_RESPONSE = 11, > + PD_EXT_PPS_STATUS = 12, > + PD_EXT_COUNTRY_INFO = 13, > + PD_EXT_COUNTRY_CODES = 14, > + /* 15-31 Reserved */ > +}; > + > +#define PD_REV10 0x0 > +#define PD_REV20 0x1 > +#define PD_REV30 0x2 > +#define PD_MAX_REV PD_REV30 > + > +#define PD_HEADER_EXT_HDR BIT(15) > +#define PD_HEADER_CNT_SHIFT 12 > +#define PD_HEADER_CNT_MASK 0x7 > +#define PD_HEADER_ID_SHIFT 9 > +#define PD_HEADER_ID_MASK 0x7 > +#define PD_HEADER_PWR_ROLE BIT(8) > +#define PD_HEADER_REV_SHIFT 6 > +#define PD_HEADER_REV_MASK 0x3 > +#define PD_HEADER_DATA_ROLE BIT(5) > +#define PD_HEADER_TYPE_SHIFT 0 > +#define PD_HEADER_TYPE_MASK 0x1f > + > +#define PD_HEADER(type, pwr, data, rev, id, cnt, ext_hdr) \ > + ((((type) & PD_HEADER_TYPE_MASK) << PD_HEADER_TYPE_SHIFT) | \ > + ((pwr) == TYPEC_SOURCE ? PD_HEADER_PWR_ROLE : 0) | \ > + ((data) == TYPEC_HOST ? PD_HEADER_DATA_ROLE : 0) | \ > + ((rev) << PD_HEADER_REV_SHIFT) | \ > + (((id) & PD_HEADER_ID_MASK) << PD_HEADER_ID_SHIFT) | \ > + (((cnt) & PD_HEADER_CNT_MASK) << PD_HEADER_CNT_SHIFT) | \ > + ((ext_hdr) ? PD_HEADER_EXT_HDR : 0)) > + > +#define PD_HEADER_LE(type, pwr, data, rev, id, cnt) \ > + cpu_to_le16(PD_HEADER((type), (pwr), (data), (rev), (id), (cnt), (0))) > + > +static inline unsigned int pd_header_cnt(u16 header) > +{ > + return (header >> PD_HEADER_CNT_SHIFT) & PD_HEADER_CNT_MASK; > +} > + > +static inline unsigned int pd_header_cnt_le(__le16 header) > +{ > + return pd_header_cnt(le16_to_cpu(header)); > +} > + > +static inline unsigned int pd_header_type(u16 header) > +{ > + return (header >> PD_HEADER_TYPE_SHIFT) & PD_HEADER_TYPE_MASK; > +} > + > +static inline unsigned int pd_header_type_le(__le16 header) > +{ > + return pd_header_type(le16_to_cpu(header)); > +} > + > +static inline unsigned int pd_header_msgid(u16 header) > +{ > + return (header >> PD_HEADER_ID_SHIFT) & PD_HEADER_ID_MASK; > +} > + > +static inline unsigned int pd_header_msgid_le(__le16 header) > +{ > + return pd_header_msgid(le16_to_cpu(header)); > +} > + > +static inline unsigned int pd_header_rev(u16 header) > +{ > + return (header >> PD_HEADER_REV_SHIFT) & PD_HEADER_REV_MASK; > +} > + > +static inline unsigned int pd_header_rev_le(__le16 header) > +{ > + return pd_header_rev(le16_to_cpu(header)); > +} > + > +#define PD_EXT_HDR_CHUNKED BIT(15) > +#define PD_EXT_HDR_CHUNK_NUM_SHIFT 11 > +#define PD_EXT_HDR_CHUNK_NUM_MASK 0xf > +#define PD_EXT_HDR_REQ_CHUNK BIT(10) > +#define PD_EXT_HDR_DATA_SIZE_SHIFT 0 > +#define PD_EXT_HDR_DATA_SIZE_MASK 0x1ff > + > +#define PD_EXT_HDR(data_size, req_chunk, chunk_num, chunked) \ > + ((((data_size) & PD_EXT_HDR_DATA_SIZE_MASK) << PD_EXT_HDR_DATA_SIZE_SHIFT) | \ > + ((req_chunk) ? PD_EXT_HDR_REQ_CHUNK : 0) | \ > + (((chunk_num) & PD_EXT_HDR_CHUNK_NUM_MASK) << PD_EXT_HDR_CHUNK_NUM_SHIFT) | \ > + ((chunked) ? PD_EXT_HDR_CHUNKED : 0)) > + > +#define PD_EXT_HDR_LE(data_size, req_chunk, chunk_num, chunked) \ > + cpu_to_le16(PD_EXT_HDR((data_size), (req_chunk), (chunk_num), (chunked))) > + > +static inline unsigned int pd_ext_header_chunk_num(u16 ext_header) > +{ > + return (ext_header >> PD_EXT_HDR_CHUNK_NUM_SHIFT) & > + PD_EXT_HDR_CHUNK_NUM_MASK; > +} > + > +static inline unsigned int pd_ext_header_data_size(u16 ext_header) > +{ > + return (ext_header >> PD_EXT_HDR_DATA_SIZE_SHIFT) & > + PD_EXT_HDR_DATA_SIZE_MASK; > +} > + > +static inline unsigned int pd_ext_header_data_size_le(__le16 ext_header) > +{ > + return pd_ext_header_data_size(le16_to_cpu(ext_header)); > +} > + > +#define PD_MAX_PAYLOAD 7 > +#define PD_EXT_MAX_CHUNK_DATA 26 > + > +/* > + * struct pd_chunked_ext_message_data - PD chunked extended message data as > + * seen on wire > + * @header: PD extended message header > + * @data: PD extended message data > + */ > +struct pd_chunked_ext_message_data { > + __le16 header; > + u8 data[PD_EXT_MAX_CHUNK_DATA]; > +} __packed; > + > +/* > + * struct pd_message - PD message as seen on wire > + * @header: PD message header > + * @payload: PD message payload > + * @ext_msg: PD message chunked extended message data > + */ > +struct pd_message { > + __le16 header; > + union { > + __le32 payload[PD_MAX_PAYLOAD]; > + struct pd_chunked_ext_message_data ext_msg; > + }; > +} __packed; > + > +/* PDO: Power Data Object */ > +#define PDO_MAX_OBJECTS 7 > + > +enum pd_pdo_type { > + PDO_TYPE_FIXED = 0, > + PDO_TYPE_BATT = 1, > + PDO_TYPE_VAR = 2, > + PDO_TYPE_APDO = 3, > +}; > + > +#define PDO_TYPE_SHIFT 30 > +#define PDO_TYPE_MASK 0x3 > + > +#define PDO_TYPE(t) ((t) << PDO_TYPE_SHIFT) > + > +#define PDO_VOLT_MASK 0x3ff > +#define PDO_CURR_MASK 0x3ff > +#define PDO_PWR_MASK 0x3ff > + > +#define PDO_FIXED_DUAL_ROLE BIT(29) /* Power role swap supported */ > +#define PDO_FIXED_SUSPEND BIT(28) /* USB Suspend supported (Source) */ > +#define PDO_FIXED_HIGHER_CAP BIT(28) /* Requires more than vSafe5V (Sink) */ > +#define PDO_FIXED_EXTPOWER BIT(27) /* Externally powered */ > +#define PDO_FIXED_USB_COMM BIT(26) /* USB communications capable */ > +#define PDO_FIXED_DATA_SWAP BIT(25) /* Data role swap supported */ > +#define PDO_FIXED_UNCHUNK_EXT BIT(24) /* Unchunked Extended Message supported (Source) */ > +#define PDO_FIXED_FRS_CURR_MASK (BIT(24) | BIT(23)) /* FR_Swap Current (Sink) */ > +#define PDO_FIXED_FRS_CURR_SHIFT 23 > +#define PDO_FIXED_VOLT_SHIFT 10 /* 50mV units */ > +#define PDO_FIXED_CURR_SHIFT 0 /* 10mA units */ > + > +#define PDO_FIXED_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_FIXED_VOLT_SHIFT) > +#define PDO_FIXED_CURR(ma) ((((ma) / 10) & PDO_CURR_MASK) << PDO_FIXED_CURR_SHIFT) > + > +#define PDO_FIXED(mv, ma, flags) \ > + (PDO_TYPE(PDO_TYPE_FIXED) | (flags) | \ > + PDO_FIXED_VOLT(mv) | PDO_FIXED_CURR(ma)) > + > +#define VSAFE5V 5000 /* mv units */ > + > +#define PDO_BATT_MAX_VOLT_SHIFT 20 /* 50mV units */ > +#define PDO_BATT_MIN_VOLT_SHIFT 10 /* 50mV units */ > +#define PDO_BATT_MAX_PWR_SHIFT 0 /* 250mW units */ > + > +#define PDO_BATT_MIN_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_BATT_MIN_VOLT_SHIFT) > +#define PDO_BATT_MAX_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_BATT_MAX_VOLT_SHIFT) > +#define PDO_BATT_MAX_POWER(mw) ((((mw) / 250) & PDO_PWR_MASK) << PDO_BATT_MAX_PWR_SHIFT) > + > +#define PDO_BATT(min_mv, max_mv, max_mw) \ > + (PDO_TYPE(PDO_TYPE_BATT) | PDO_BATT_MIN_VOLT(min_mv) | \ > + PDO_BATT_MAX_VOLT(max_mv) | PDO_BATT_MAX_POWER(max_mw)) > + > +#define PDO_VAR_MAX_VOLT_SHIFT 20 /* 50mV units */ > +#define PDO_VAR_MIN_VOLT_SHIFT 10 /* 50mV units */ > +#define PDO_VAR_MAX_CURR_SHIFT 0 /* 10mA units */ > + > +#define PDO_VAR_MIN_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_VAR_MIN_VOLT_SHIFT) > +#define PDO_VAR_MAX_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_VAR_MAX_VOLT_SHIFT) > +#define PDO_VAR_MAX_CURR(ma) ((((ma) / 10) & PDO_CURR_MASK) << PDO_VAR_MAX_CURR_SHIFT) > + > +#define PDO_VAR(min_mv, max_mv, max_ma) \ > + (PDO_TYPE(PDO_TYPE_VAR) | PDO_VAR_MIN_VOLT(min_mv) | \ > + PDO_VAR_MAX_VOLT(max_mv) | PDO_VAR_MAX_CURR(max_ma)) > + > +enum pd_apdo_type { > + APDO_TYPE_PPS = 0, > +}; > + > +#define PDO_APDO_TYPE_SHIFT 28 /* Only valid value currently is 0x0 - PPS */ > +#define PDO_APDO_TYPE_MASK 0x3 > + > +#define PDO_APDO_TYPE(t) ((t) << PDO_APDO_TYPE_SHIFT) > + > +#define PDO_PPS_APDO_MAX_VOLT_SHIFT 17 /* 100mV units */ > +#define PDO_PPS_APDO_MIN_VOLT_SHIFT 8 /* 100mV units */ > +#define PDO_PPS_APDO_MAX_CURR_SHIFT 0 /* 50mA units */ > + > +#define PDO_PPS_APDO_VOLT_MASK 0xff > +#define PDO_PPS_APDO_CURR_MASK 0x7f > + > +#define PDO_PPS_APDO_MIN_VOLT(mv) \ > + ((((mv) / 100) & PDO_PPS_APDO_VOLT_MASK) << PDO_PPS_APDO_MIN_VOLT_SHIFT) > +#define PDO_PPS_APDO_MAX_VOLT(mv) \ > + ((((mv) / 100) & PDO_PPS_APDO_VOLT_MASK) << PDO_PPS_APDO_MAX_VOLT_SHIFT) > +#define PDO_PPS_APDO_MAX_CURR(ma) \ > + ((((ma) / 50) & PDO_PPS_APDO_CURR_MASK) << PDO_PPS_APDO_MAX_CURR_SHIFT) > + > +#define PDO_PPS_APDO(min_mv, max_mv, max_ma) \ > + (PDO_TYPE(PDO_TYPE_APDO) | PDO_APDO_TYPE(APDO_TYPE_PPS) | \ > + PDO_PPS_APDO_MIN_VOLT(min_mv) | PDO_PPS_APDO_MAX_VOLT(max_mv) | \ > + PDO_PPS_APDO_MAX_CURR(max_ma)) > + > +static inline enum pd_pdo_type pdo_type(u32 pdo) > +{ > + return (pdo >> PDO_TYPE_SHIFT) & PDO_TYPE_MASK; > +} > + > +static inline unsigned int pdo_fixed_voltage(u32 pdo) > +{ > + return ((pdo >> PDO_FIXED_VOLT_SHIFT) & PDO_VOLT_MASK) * 50; > +} > + > +static inline unsigned int pdo_min_voltage(u32 pdo) > +{ > + return ((pdo >> PDO_VAR_MIN_VOLT_SHIFT) & PDO_VOLT_MASK) * 50; > +} > + > +static inline unsigned int pdo_max_voltage(u32 pdo) > +{ > + return ((pdo >> PDO_VAR_MAX_VOLT_SHIFT) & PDO_VOLT_MASK) * 50; > +} > + > +static inline unsigned int pdo_max_current(u32 pdo) > +{ > + return ((pdo >> PDO_VAR_MAX_CURR_SHIFT) & PDO_CURR_MASK) * 10; > +} > + > +static inline unsigned int pdo_max_power(u32 pdo) > +{ > + return ((pdo >> PDO_BATT_MAX_PWR_SHIFT) & PDO_PWR_MASK) * 250; > +} > + > +static inline enum pd_apdo_type pdo_apdo_type(u32 pdo) > +{ > + return (pdo >> PDO_APDO_TYPE_SHIFT) & PDO_APDO_TYPE_MASK; > +} > + > +static inline unsigned int pdo_pps_apdo_min_voltage(u32 pdo) > +{ > + return ((pdo >> PDO_PPS_APDO_MIN_VOLT_SHIFT) & > + PDO_PPS_APDO_VOLT_MASK) * 100; > +} > + > +static inline unsigned int pdo_pps_apdo_max_voltage(u32 pdo) > +{ > + return ((pdo >> PDO_PPS_APDO_MAX_VOLT_SHIFT) & > + PDO_PPS_APDO_VOLT_MASK) * 100; > +} > + > +static inline unsigned int pdo_pps_apdo_max_current(u32 pdo) > +{ > + return ((pdo >> PDO_PPS_APDO_MAX_CURR_SHIFT) & > + PDO_PPS_APDO_CURR_MASK) * 50; > +} > + > +/* RDO: Request Data Object */ > +#define RDO_OBJ_POS_SHIFT 28 > +#define RDO_OBJ_POS_MASK 0x7 > +#define RDO_GIVE_BACK BIT(27) /* Supports reduced operating current */ > +#define RDO_CAP_MISMATCH BIT(26) /* Not satisfied by source caps */ > +#define RDO_USB_COMM BIT(25) /* USB communications capable */ > +#define RDO_NO_SUSPEND BIT(24) /* USB Suspend not supported */ > + > +#define RDO_PWR_MASK 0x3ff > +#define RDO_CURR_MASK 0x3ff > + > +#define RDO_FIXED_OP_CURR_SHIFT 10 > +#define RDO_FIXED_MAX_CURR_SHIFT 0 > + > +#define RDO_OBJ(idx) (((idx) & RDO_OBJ_POS_MASK) << RDO_OBJ_POS_SHIFT) > + > +#define PDO_FIXED_OP_CURR(ma) ((((ma) / 10) & RDO_CURR_MASK) << RDO_FIXED_OP_CURR_SHIFT) > +#define PDO_FIXED_MAX_CURR(ma) ((((ma) / 10) & RDO_CURR_MASK) << RDO_FIXED_MAX_CURR_SHIFT) > + > +#define RDO_FIXED(idx, op_ma, max_ma, flags) \ > + (RDO_OBJ(idx) | (flags) | \ > + PDO_FIXED_OP_CURR(op_ma) | PDO_FIXED_MAX_CURR(max_ma)) > + > +#define RDO_BATT_OP_PWR_SHIFT 10 /* 250mW units */ > +#define RDO_BATT_MAX_PWR_SHIFT 0 /* 250mW units */ > + > +#define RDO_BATT_OP_PWR(mw) ((((mw) / 250) & RDO_PWR_MASK) << RDO_BATT_OP_PWR_SHIFT) > +#define RDO_BATT_MAX_PWR(mw) ((((mw) / 250) & RDO_PWR_MASK) << RDO_BATT_MAX_PWR_SHIFT) > + > +#define RDO_BATT(idx, op_mw, max_mw, flags) \ > + (RDO_OBJ(idx) | (flags) | \ > + RDO_BATT_OP_PWR(op_mw) | RDO_BATT_MAX_PWR(max_mw)) > + > +#define RDO_PROG_VOLT_MASK 0x7ff > +#define RDO_PROG_CURR_MASK 0x7f > + > +#define RDO_PROG_VOLT_SHIFT 9 > +#define RDO_PROG_CURR_SHIFT 0 > + > +#define RDO_PROG_VOLT_MV_STEP 20 > +#define RDO_PROG_CURR_MA_STEP 50 > + > +#define PDO_PROG_OUT_VOLT(mv) \ > + ((((mv) / RDO_PROG_VOLT_MV_STEP) & RDO_PROG_VOLT_MASK) << RDO_PROG_VOLT_SHIFT) > +#define PDO_PROG_OP_CURR(ma) \ > + ((((ma) / RDO_PROG_CURR_MA_STEP) & RDO_PROG_CURR_MASK) << RDO_PROG_CURR_SHIFT) > + > +#define RDO_PROG(idx, out_mv, op_ma, flags) \ > + (RDO_OBJ(idx) | (flags) | \ > + PDO_PROG_OUT_VOLT(out_mv) | PDO_PROG_OP_CURR(op_ma)) > + > +static inline unsigned int rdo_index(u32 rdo) > +{ > + return (rdo >> RDO_OBJ_POS_SHIFT) & RDO_OBJ_POS_MASK; > +} > + > +static inline unsigned int rdo_op_current(u32 rdo) > +{ > + return ((rdo >> RDO_FIXED_OP_CURR_SHIFT) & RDO_CURR_MASK) * 10; > +} > + > +static inline unsigned int rdo_max_current(u32 rdo) > +{ > + return ((rdo >> RDO_FIXED_MAX_CURR_SHIFT) & > + RDO_CURR_MASK) * 10; > +} > + > +static inline unsigned int rdo_op_power(u32 rdo) > +{ > + return ((rdo >> RDO_BATT_OP_PWR_SHIFT) & RDO_PWR_MASK) * 250; > +} > + > +static inline unsigned int rdo_max_power(u32 rdo) > +{ > + return ((rdo >> RDO_BATT_MAX_PWR_SHIFT) & RDO_PWR_MASK) * 250; > +} > + > +/* Enter_USB Data Object */ > +#define EUDO_USB_MODE_MASK GENMASK(30, 28) > +#define EUDO_USB_MODE_SHIFT 28 > +#define EUDO_USB_MODE_USB2 0 > +#define EUDO_USB_MODE_USB3 1 > +#define EUDO_USB_MODE_USB4 2 > +#define EUDO_USB4_DRD BIT(26) > +#define EUDO_USB3_DRD BIT(25) > +#define EUDO_CABLE_SPEED_MASK GENMASK(23, 21) > +#define EUDO_CABLE_SPEED_SHIFT 21 > +#define EUDO_CABLE_SPEED_USB2 0 > +#define EUDO_CABLE_SPEED_USB3_GEN1 1 > +#define EUDO_CABLE_SPEED_USB4_GEN2 2 > +#define EUDO_CABLE_SPEED_USB4_GEN3 3 > +#define EUDO_CABLE_TYPE_MASK GENMASK(20, 19) > +#define EUDO_CABLE_TYPE_SHIFT 19 > +#define EUDO_CABLE_TYPE_PASSIVE 0 > +#define EUDO_CABLE_TYPE_RE_TIMER 1 > +#define EUDO_CABLE_TYPE_RE_DRIVER 2 > +#define EUDO_CABLE_TYPE_OPTICAL 3 > +#define EUDO_CABLE_CURRENT_MASK GENMASK(18, 17) > +#define EUDO_CABLE_CURRENT_SHIFT 17 > +#define EUDO_CABLE_CURRENT_NOTSUPP 0 > +#define EUDO_CABLE_CURRENT_3A 2 > +#define EUDO_CABLE_CURRENT_5A 3 > +#define EUDO_PCIE_SUPPORT BIT(16) > +#define EUDO_DP_SUPPORT BIT(15) > +#define EUDO_TBT_SUPPORT BIT(14) > +#define EUDO_HOST_PRESENT BIT(13) > + > +/* USB PD timers and counters */ > +#define PD_T_NO_RESPONSE 5000 /* 4.5 - 5.5 seconds */ > +#define PD_T_DB_DETECT 10000 /* 10 - 15 seconds */ > +#define PD_T_SEND_SOURCE_CAP 150 /* 100 - 200 ms */ > +#define PD_T_SENDER_RESPONSE 60 /* 24 - 30 ms, relaxed */ > +#define PD_T_RECEIVER_RESPONSE 15 /* 15ms max */ > +#define PD_T_SOURCE_ACTIVITY 45 > +#define PD_T_SINK_ACTIVITY 135 > +#define PD_T_SINK_WAIT_CAP 310 /* 310 - 620 ms */ > +#define PD_T_PS_TRANSITION 500 > +#define PD_T_SRC_TRANSITION 35 > +#define PD_T_DRP_SNK 40 > +#define PD_T_DRP_SRC 30 > +#define PD_T_PS_SOURCE_OFF 920 > +#define PD_T_PS_SOURCE_ON 480 > +#define PD_T_PS_SOURCE_ON_PRS 450 /* 390 - 480ms */ > +#define PD_T_PS_HARD_RESET 30 > +#define PD_T_SRC_RECOVER 760 > +#define PD_T_SRC_RECOVER_MAX 1000 > +#define PD_T_SRC_TURN_ON 275 > +#define PD_T_SAFE_0V 650 > +#define PD_T_VCONN_SOURCE_ON 100 > +#define PD_T_SINK_REQUEST 100 /* 100 ms minimum */ > +#define PD_T_ERROR_RECOVERY 100 /* minimum 25 is insufficient */ > +#define PD_T_SRCSWAPSTDBY 625 /* Maximum of 650ms */ > +#define PD_T_NEWSRC 250 /* Maximum of 275ms */ > +#define PD_T_SWAP_SRC_START 20 /* Minimum of 20ms */ > +#define PD_T_BIST_CONT_MODE 50 /* 30 - 60 ms */ > +#define PD_T_SINK_TX 16 /* 16 - 20 ms */ > +#define PD_T_CHUNK_NOT_SUPP 42 /* 40 - 50 ms */ > + > +#define PD_T_DRP_TRY 100 /* 75 - 150 ms */ > +#define PD_T_DRP_TRYWAIT 600 /* 400 - 800 ms */ > + > +#define PD_T_CC_DEBOUNCE 200 /* 100 - 200 ms */ > +#define PD_T_PD_DEBOUNCE 20 /* 10 - 20 ms */ > +#define PD_T_TRY_CC_DEBOUNCE 15 /* 10 - 20 ms */ > + > +#define PD_N_CAPS_COUNT (PD_T_NO_RESPONSE / PD_T_SEND_SOURCE_CAP) > +#define PD_N_HARD_RESET_COUNT 1 > + > +#define PD_P_SNK_STDBY_MW 2500 /* 2500 mW */ > + > +/* Time to wait for TCPC to complete transmit */ > +#define PD_T_TCPC_TX_TIMEOUT 100 /* in ms */ > + > +#endif /* __LINUX_USB_PD_H */ > diff --git a/include/usb/tcpm.h b/include/usb/tcpm.h > new file mode 100644 > index 000000000000..4574a5175ddb > --- /dev/null > +++ b/include/usb/tcpm.h > @@ -0,0 +1,99 @@ > +/* SPDX-License-Identifier: GPL-2.0-or-later */ > +/* > + * Copyright 2015-2017 Google, Inc > + * Copyright 2024 Collabora > + */ > + > +#ifndef __LINUX_USB_TCPM_H > +#define __LINUX_USB_TCPM_H > + > +#include <dm/of.h> > +#include <linux/bitops.h> > +#include "pd.h" > + > +enum typec_orientation { > + TYPEC_ORIENTATION_NONE, > + TYPEC_ORIENTATION_NORMAL, > + TYPEC_ORIENTATION_REVERSE, > +}; > + > +enum typec_cc_status { > + TYPEC_CC_OPEN, > + TYPEC_CC_RA, > + TYPEC_CC_RD, > + TYPEC_CC_RP_DEF, > + TYPEC_CC_RP_1_5, > + TYPEC_CC_RP_3_0, > +}; > + > +enum typec_cc_polarity { > + TYPEC_POLARITY_CC1, > + TYPEC_POLARITY_CC2, > +}; > + > +enum tcpm_transmit_status { > + TCPC_TX_SUCCESS = 0, > + TCPC_TX_DISCARDED = 1, > + TCPC_TX_FAILED = 2, > +}; > + > +enum tcpm_transmit_type { > + TCPC_TX_SOP = 0, > + TCPC_TX_SOP_PRIME = 1, > + TCPC_TX_SOP_PRIME_PRIME = 2, > + TCPC_TX_SOP_DEBUG_PRIME = 3, > + TCPC_TX_SOP_DEBUG_PRIME_PRIME = 4, > + TCPC_TX_HARD_RESET = 5, > + TCPC_TX_CABLE_RESET = 6, > + TCPC_TX_BIST_MODE_2 = 7 > +}; > + > +struct dm_tcpm_ops { > + int (*get_connector_node)(struct udevice *dev, ofnode *connector_node); > + int (*init)(struct udevice *dev); > + int (*get_vbus)(struct udevice *dev); > + int (*set_cc)(struct udevice *dev, enum typec_cc_status cc); > + int (*get_cc)(struct udevice *dev, enum typec_cc_status *cc1, > + enum typec_cc_status *cc2); > + int (*set_polarity)(struct udevice *dev, > + enum typec_cc_polarity polarity); > + int (*set_vconn)(struct udevice *dev, bool on); > + int (*set_vbus)(struct udevice *dev, bool on, bool charge); > + int (*set_pd_rx)(struct udevice *dev, bool on); > + int (*set_roles)(struct udevice *dev, bool attached, > + enum typec_role role, enum typec_data_role data); > + int (*start_toggling)(struct udevice *dev, > + enum typec_port_type port_type, > + enum typec_cc_status cc); > + int (*pd_transmit)(struct udevice *dev, enum tcpm_transmit_type type, > + const struct pd_message *msg, unsigned int negotiated_rev); > + void (*poll_event)(struct udevice *dev); > + int (*enter_low_power_mode)(struct udevice *dev, bool attached, bool pd_capable); > +}; > + > +/* API for drivers */ > +void tcpm_vbus_change(struct udevice *dev); > +void tcpm_cc_change(struct udevice *dev); > +void tcpm_pd_receive(struct udevice *dev, const struct pd_message *msg); > +void tcpm_pd_transmit_complete(struct udevice *dev, > + enum tcpm_transmit_status status); > +void tcpm_pd_hard_reset(struct udevice *dev); > + > +/* API for boards */ > +extern const char * const typec_pd_rev_name[]; > +extern const char * const typec_orientation_name[]; > +extern const char * const typec_role_name[]; > +extern const char * const typec_data_role_name[]; > +extern const char * const typec_cc_status_name[]; > + > +int tcpm_get(const char *name, struct udevice **devp); > +int tcpm_get_pd_rev(struct udevice *dev); > +int tcpm_get_current(struct udevice *dev); > +int tcpm_get_voltage(struct udevice *dev); > +enum typec_orientation tcpm_get_orientation(struct udevice *dev); > +enum typec_role tcpm_get_pwr_role(struct udevice *dev); > +enum typec_data_role tcpm_get_data_role(struct udevice *dev); > +bool tcpm_is_connected(struct udevice *dev); > +const char *tcpm_get_state(struct udevice *dev); > + > +#endif /* __LINUX_USB_TCPM_H */ > -- > 2.45.2 >
diff --git a/Makefile b/Makefile index 74df5d177c1f..5a581199c170 100644 --- a/Makefile +++ b/Makefile @@ -879,6 +879,7 @@ libs-y += drivers/usb/musb/ libs-y += drivers/usb/musb-new/ libs-y += drivers/usb/isp1760/ libs-y += drivers/usb/phy/ +libs-y += drivers/usb/tcpm/ libs-y += drivers/usb/ulpi/ ifdef CONFIG_POST libs-y += post/ diff --git a/cmd/Kconfig b/cmd/Kconfig index 978f44eda426..7710bee22ace 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -221,6 +221,13 @@ config CMD_REGINFO help Register dump +config CMD_TCPM + bool "tcpm" + depends on TYPEC_TCPM + help + Show voltage and current negotiated via USB PD as well as the + current state of the Type C Port Manager (TCPM) state machine. + config CMD_TLV_EEPROM bool "tlv_eeprom" depends on I2C_EEPROM diff --git a/cmd/Makefile b/cmd/Makefile index 87133cc27a8a..bd0b23ef1013 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -172,6 +172,7 @@ obj-$(CONFIG_CMD_SMBIOS) += smbios.o obj-$(CONFIG_CMD_SMC) += smccc.o obj-$(CONFIG_CMD_SYSBOOT) += sysboot.o obj-$(CONFIG_CMD_STACKPROTECTOR_TEST) += stackprot_test.o +obj-$(CONFIG_CMD_TCPM) += tcpm.o obj-$(CONFIG_CMD_TEMPERATURE) += temperature.o obj-$(CONFIG_CMD_TERMINAL) += terminal.o obj-$(CONFIG_CMD_TIME) += time.o diff --git a/cmd/tcpm.c b/cmd/tcpm.c new file mode 100644 index 000000000000..962cd234a869 --- /dev/null +++ b/cmd/tcpm.c @@ -0,0 +1,136 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2024 Collabora + */ + +#include <command.h> +#include <errno.h> +#include <dm.h> +#include <dm/uclass-internal.h> +#include <usb/tcpm.h> + +#define LIMIT_DEV 32 +#define LIMIT_PARENT 20 + +static struct udevice *currdev; + +static int do_dev(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) +{ + char *name; + int ret = -ENODEV; + + switch (argc) { + case 2: + name = argv[1]; + ret = tcpm_get(name, &currdev); + if (ret) { + log_err("Can't get TCPM %s: %d (%s)!\n", name, ret, errno_str(ret)); + return CMD_RET_FAILURE; + } + case 1: + if (!currdev) { + log_err("TCPM device is not set!\n\n"); + return CMD_RET_USAGE; + } + + printf("dev: %d @ %s\n", dev_seq(currdev), currdev->name); + } + + return CMD_RET_SUCCESS; +} + +static int do_list(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + struct udevice *dev; + int ret, err = 0; + + printf("| %-*.*s| %-*.*s| %s @ %s\n", + LIMIT_DEV, LIMIT_DEV, "Name", + LIMIT_PARENT, LIMIT_PARENT, "Parent name", + "Parent uclass", "seq"); + + for (ret = uclass_first_device_check(UCLASS_TCPM, &dev); dev; + ret = uclass_next_device_check(&dev)) { + if (ret) + err = ret; + + printf("| %-*.*s| %-*.*s| %s @ %d | status: %i\n", + LIMIT_DEV, LIMIT_DEV, dev->name, + LIMIT_PARENT, LIMIT_PARENT, dev->parent->name, + dev_get_uclass_name(dev->parent), dev_seq(dev->parent), + ret); + } + + if (err) + return CMD_RET_FAILURE; + + return CMD_RET_SUCCESS; +} + +int do_print_info(struct udevice *dev) +{ + enum typec_orientation orientation = tcpm_get_orientation(dev); + const char *state = tcpm_get_state(dev); + int pd_rev = tcpm_get_pd_rev(dev); + int mv = tcpm_get_voltage(dev); + int ma = tcpm_get_current(dev); + enum typec_role pwr_role = tcpm_get_pwr_role(dev); + enum typec_data_role data_role = tcpm_get_data_role(dev); + bool connected = tcpm_is_connected(dev); + + if (!connected) { + printf("TCPM State: %s\n", state); + return 0; + } + + printf("Orientation: %s\n", typec_orientation_name[orientation]); + printf("PD Revision: %s\n", typec_pd_rev_name[pd_rev]); + printf("Power Role: %s\n", typec_role_name[pwr_role]); + printf("Data Role: %s\n", typec_data_role_name[data_role]); + printf("Voltage: %2d.%03d V\n", mv / 1000, mv % 1000); + printf("Current: %2d.%03d A\n", ma / 1000, ma % 1000); + + return 0; +} + +static int do_info(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + if (!currdev) { + printf("First, set the TCPM device!\n"); + return CMD_RET_USAGE; + } + + return do_print_info(currdev); +} + +static struct cmd_tbl subcmd[] = { + U_BOOT_CMD_MKENT(dev, 2, 1, do_dev, "", ""), + U_BOOT_CMD_MKENT(list, 1, 1, do_list, "", ""), + U_BOOT_CMD_MKENT(info, 1, 1, do_info, "", ""), +}; + +static int do_tcpm(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + struct cmd_tbl *cmd; + + argc--; + argv++; + + cmd = find_cmd_tbl(argv[0], subcmd, ARRAY_SIZE(subcmd)); + if (!cmd || argc > cmd->maxargs) + return CMD_RET_USAGE; + + return cmd->cmd(cmdtp, flag, argc, argv); +} + + /**************************************************/ + +U_BOOT_CMD(tcpm, CONFIG_SYS_MAXARGS, 1, do_tcpm, + "TCPM sub-system", + "list - list TCPM devices\n" + "tcpm dev [name] - show or [set] operating TCPM device\n" + "tcpm info - dump information\n" +); diff --git a/doc/usage/cmd/tcpm.rst b/doc/usage/cmd/tcpm.rst new file mode 100644 index 000000000000..1e8199c0f89c --- /dev/null +++ b/doc/usage/cmd/tcpm.rst @@ -0,0 +1,66 @@ +.. SPDX-License-Identifier: GPL-2.0+: + +.. index:: + single: tcpm (command) + +tcpm command +============ + +Synopsis +-------- + +:: + + tcpm dev [devname] + tcpm info + tcpm list + +Description +----------- + +The tcpm command is used to control USB-PD controllers, also known as TypeC Port Manager (TCPM). + +The 'tcpm dev' command shows or set current TCPM device. + + devname + device name to change + +The 'tcpm info' command displays the current state of the device + +The 'tcpm list' command displays the list available devices. + +Examples +-------- + +The 'tcpm info' command displays device's status: +:: + + => tcpm info + Orientation: normal + PD Revision: rev3 + Power Role: sink + Data Role: device + Voltage: 20.000 V + Current: 2.250 A + +The current device can be shown or set via 'tcpm dev' command: +:: + + => tcpm dev + TCPM device is not set! + => tcpm dev usb-typec@22 + dev: 0 @ usb-typec@22 + => tcpm dev + dev: 0 @ usb-typec@22 + +The list of available devices can be shown via 'tcpm list' command: +:: + + => tcpm list + | Name | Parent name | Parent uclass @ seq + | usb-typec@22 | i2c@feac0000 | i2c @ 4 | status: 0 + +Configuration +------------- + +The tcpm command is only available if CONFIG_CMD_TCPM=y. diff --git a/doc/usage/index.rst b/doc/usage/index.rst index 6a218c46b4e4..b4be42f59119 100644 --- a/doc/usage/index.rst +++ b/doc/usage/index.rst @@ -111,6 +111,7 @@ Shell commands cmd/smbios cmd/sound cmd/source + cmd/tcpm cmd/temperature cmd/tftpput cmd/trace diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig index a972d87c7ad4..985d3a9ef7e6 100644 --- a/drivers/usb/Kconfig +++ b/drivers/usb/Kconfig @@ -85,6 +85,8 @@ source "drivers/usb/emul/Kconfig" source "drivers/usb/phy/Kconfig" +source "drivers/usb/tcpm/Kconfig" + source "drivers/usb/ulpi/Kconfig" if USB_HOST diff --git a/drivers/usb/tcpm/Kconfig b/drivers/usb/tcpm/Kconfig new file mode 100644 index 000000000000..55bf8e202b90 --- /dev/null +++ b/drivers/usb/tcpm/Kconfig @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0 + +config TYPEC_TCPM + tristate "USB Type-C Port Controller Manager" + depends on DM + help + The Type-C Port Controller Manager provides a USB PD and USB Type-C + state machine for use with Type-C Port Controllers. diff --git a/drivers/usb/tcpm/Makefile b/drivers/usb/tcpm/Makefile new file mode 100644 index 000000000000..a0f76436f3fd --- /dev/null +++ b/drivers/usb/tcpm/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0 + +obj-$(CONFIG_TYPEC_TCPM) += tcpm.o tcpm-uclass.o diff --git a/drivers/usb/tcpm/tcpm-internal.h b/drivers/usb/tcpm/tcpm-internal.h new file mode 100644 index 000000000000..561442090027 --- /dev/null +++ b/drivers/usb/tcpm/tcpm-internal.h @@ -0,0 +1,173 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright 2015-2017 Google, Inc + * Copyright 2024 Collabora + */ + +#ifndef __LINUX_USB_TCPM_INTERNAL_H +#define __LINUX_USB_TCPM_INTERNAL_H + +#define FOREACH_TCPM_STATE(S) \ + S(INVALID_STATE), \ + S(TOGGLING), \ + S(SRC_UNATTACHED), \ + S(SRC_ATTACH_WAIT), \ + S(SRC_ATTACHED), \ + S(SRC_STARTUP), \ + S(SRC_SEND_CAPABILITIES), \ + S(SRC_SEND_CAPABILITIES_TIMEOUT), \ + S(SRC_NEGOTIATE_CAPABILITIES), \ + S(SRC_TRANSITION_SUPPLY), \ + S(SRC_READY), \ + S(SRC_WAIT_NEW_CAPABILITIES), \ + \ + S(SNK_UNATTACHED), \ + S(SNK_ATTACH_WAIT), \ + S(SNK_DEBOUNCED), \ + S(SNK_ATTACHED), \ + S(SNK_STARTUP), \ + S(SNK_DISCOVERY), \ + S(SNK_DISCOVERY_DEBOUNCE), \ + S(SNK_DISCOVERY_DEBOUNCE_DONE), \ + S(SNK_WAIT_CAPABILITIES), \ + S(SNK_NEGOTIATE_CAPABILITIES), \ + S(SNK_TRANSITION_SINK), \ + S(SNK_TRANSITION_SINK_VBUS), \ + S(SNK_READY), \ + \ + S(HARD_RESET_SEND), \ + S(HARD_RESET_START), \ + S(SRC_HARD_RESET_VBUS_OFF), \ + S(SRC_HARD_RESET_VBUS_ON), \ + S(SNK_HARD_RESET_SINK_OFF), \ + S(SNK_HARD_RESET_WAIT_VBUS), \ + S(SNK_HARD_RESET_SINK_ON), \ + \ + S(SOFT_RESET), \ + S(SOFT_RESET_SEND), \ + \ + S(DR_SWAP_ACCEPT), \ + S(DR_SWAP_CHANGE_DR), \ + \ + S(ERROR_RECOVERY), \ + S(PORT_RESET), \ + S(PORT_RESET_WAIT_OFF) + +#define GENERATE_TCPM_ENUM(e) e +#define GENERATE_TCPM_STRING(s) #s +#define TCPM_POLL_EVENT_TIME_OUT 2000 + +enum tcpm_state { + FOREACH_TCPM_STATE(GENERATE_TCPM_ENUM) +}; + +enum pd_msg_request { + PD_MSG_NONE = 0, + PD_MSG_CTRL_REJECT, + PD_MSG_CTRL_WAIT, + PD_MSG_CTRL_NOT_SUPP, + PD_MSG_DATA_SINK_CAP, + PD_MSG_DATA_SOURCE_CAP, +}; + +struct tcpm_port { + enum typec_port_type typec_type; + int typec_prefer_role; + + enum typec_role vconn_role; + enum typec_role pwr_role; + enum typec_data_role data_role; + + struct typec_partner *partner; + + enum typec_cc_status cc_req; + enum typec_cc_status cc1; + enum typec_cc_status cc2; + enum typec_cc_polarity polarity; + + bool attached; + bool connected; + int poll_event_cnt; + enum typec_port_type port_type; + + /* + * Set to true when vbus is greater than VSAFE5V min. + * Set to false when vbus falls below vSinkDisconnect max threshold. + */ + bool vbus_present; + + /* + * Set to true when vbus is less than VSAFE0V max. + * Set to false when vbus is greater than VSAFE0V max. + */ + bool vbus_vsafe0v; + + bool vbus_never_low; + bool vbus_source; + bool vbus_charge; + + int try_role; + + enum pd_msg_request queued_message; + + enum tcpm_state enter_state; + enum tcpm_state prev_state; + enum tcpm_state state; + enum tcpm_state delayed_state; + unsigned long delay_ms; + + bool state_machine_running; + + bool tx_complete; + enum tcpm_transmit_status tx_status; + + unsigned int negotiated_rev; + unsigned int message_id; + unsigned int caps_count; + unsigned int hard_reset_count; + bool pd_capable; + bool explicit_contract; + unsigned int rx_msgid; + + /* Partner capabilities/requests */ + u32 sink_request; + u32 source_caps[PDO_MAX_OBJECTS]; + unsigned int nr_source_caps; + u32 sink_caps[PDO_MAX_OBJECTS]; + unsigned int nr_sink_caps; + + /* + * whether to wait for the Type-C device to send the DR_SWAP Message flag + * For Type-C device with Dual-Role Power and Dual-Role Data, the port side + * is used as sink + ufp, then the tcpm framework needs to wait for Type-C + * device to initiate DR_swap Message. + */ + bool wait_dr_swap_message; + + /* Local capabilities */ + u32 src_pdo[PDO_MAX_OBJECTS]; + unsigned int nr_src_pdo; + u32 snk_pdo[PDO_MAX_OBJECTS]; + unsigned int nr_snk_pdo; + + unsigned int operating_snk_mw; + bool update_sink_caps; + + /* Requested current / voltage to the port partner */ + u32 req_current_limit; + u32 req_supply_voltage; + /* Actual current / voltage limit of the local port */ + u32 current_limit; + u32 supply_voltage; + + /* port belongs to a self powered device */ + bool self_powered; + + unsigned long delay_target; +}; + +extern const char * const tcpm_states[]; + +int tcpm_post_probe(struct udevice *dev); + +#endif diff --git a/drivers/usb/tcpm/tcpm-uclass.c b/drivers/usb/tcpm/tcpm-uclass.c new file mode 100644 index 000000000000..92f9eff1ada6 --- /dev/null +++ b/drivers/usb/tcpm/tcpm-uclass.c @@ -0,0 +1,149 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2024 Collabora Ltd. + * + * USB Power Delivery protocol stack. + */ + +#include <dm/device.h> +#include <dm/device_compat.h> +#include <dm/uclass.h> +#include <linux/err.h> +#include <usb/tcpm.h> +#include "tcpm-internal.h" + +int tcpm_get_voltage(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + return port->supply_voltage; +} + +int tcpm_get_current(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + return port->current_limit; +} + +enum typec_orientation tcpm_get_orientation(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + switch (port->polarity) { + case TYPEC_POLARITY_CC1: + return TYPEC_ORIENTATION_NORMAL; + case TYPEC_POLARITY_CC2: + return TYPEC_ORIENTATION_REVERSE; + default: + return TYPEC_ORIENTATION_NONE; + } +} + +const char *tcpm_get_state(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + return tcpm_states[port->state]; +} + +int tcpm_get_pd_rev(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + return port->negotiated_rev; +} + +enum typec_role tcpm_get_pwr_role(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + return port->pwr_role; +} + +enum typec_data_role tcpm_get_data_role(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + return port->data_role; +} + +bool tcpm_is_connected(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + return port->connected; +} + +int tcpm_get(const char *name, struct udevice **devp) +{ + return uclass_get_device_by_name(UCLASS_TCPM, name, devp); +} + +static int tcpm_post_bind(struct udevice *dev) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + const char *cap_str; + ofnode node; + int ret; + + /* + * USB Power Delivery (USB PD) specification requires, that communication + * with a sink happens within roughly 5 seconds. Otherwise the source + * might assume that the sink does not support USB PD. Starting to do + * USB PD communication after that results in a hard reset, which briefly + * removes any power from the USB-C port. + * + * On systems with alternative power supplies this is not an issue, but + * systems, which get soleley powered through their USB-C port will end + * up losing their power supply and doing a board level reset. The hard + * reset will also restart the 5 second timeout. That means a operating + * system initializing USB PD will put the system into a boot loop when + * it takes more than 5 seconds from cold boot to the operating system + * starting to transmit USB PD messages. + * + * The issue can be avoided by doing the initial USB PD communication + * in U-Boot. The operating system can then re-negotiate by doing a + * soft reset, which does not trigger removal of the supply voltage. + * + * Since the TCPM state machine is quite complex and depending on the + * remote side can take quite some time to finish, this tries to limit + * the automatic probing to systems probably relying on power being + * provided by the USB-C port(s): + * + * 1. self-powered devices won't reset when the USB-C port looses power + * 2. if the power is allowed to go into anything else than sink mode + * it is not the only power source + */ + ret = drvops->get_connector_node(dev, &node); + if (ret) + return ret; + + if (ofnode_read_bool(node, "self-powered")) + return 0; + + cap_str = ofnode_read_string(node, "power-role"); + if (!cap_str) + return -EINVAL; + + if (strcmp("sink", cap_str)) + return 0; + + /* Do not auto-probe PD controller when PD is disabled */ + if (ofnode_read_bool(node, "pd-disable")) + return 0; + + dev_info(dev, "probing Type-C port manager..."); + + dev_or_flags(dev, DM_FLAG_PROBE_AFTER_BIND); + + return 0; +} + +UCLASS_DRIVER(tcpm) = { + .id = UCLASS_TCPM, + .name = "tcpm", + .per_device_plat_auto = sizeof(struct tcpm_port), + .post_bind = tcpm_post_bind, + .post_probe = tcpm_post_probe, +}; diff --git a/drivers/usb/tcpm/tcpm.c b/drivers/usb/tcpm/tcpm.c new file mode 100644 index 000000000000..0aee57cb2f4a --- /dev/null +++ b/drivers/usb/tcpm/tcpm.c @@ -0,0 +1,2288 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2015-2017 Google, Inc + * + * USB Power Delivery protocol stack. + */ + +#include <asm/gpio.h> +#include <asm/io.h> +#include <dm.h> +#include <dm/device_compat.h> +#include <dm/device-internal.h> +#include <dm/devres.h> +#include <linux/compat.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/iopoll.h> +#include <time.h> +#include <usb/tcpm.h> +#include "tcpm-internal.h" + +DECLARE_GLOBAL_DATA_PTR; + +const char * const tcpm_states[] = { + FOREACH_TCPM_STATE(GENERATE_TCPM_STRING) +}; + +const char * const typec_pd_rev_name[] = { + [PD_REV10] = "rev1", + [PD_REV20] = "rev2", + [PD_REV30] = "rev3", +}; + +const char * const typec_role_name[] = { + [TYPEC_SINK] = "sink", + [TYPEC_SOURCE] = "source", +}; + +const char * const typec_data_role_name[] = { + [TYPEC_DEVICE] = "device", + [TYPEC_HOST] = "host", +}; + +const char * const typec_orientation_name[] = { + [TYPEC_ORIENTATION_NONE] = "none", + [TYPEC_ORIENTATION_NORMAL] = "normal", + [TYPEC_ORIENTATION_REVERSE] = "reverse", +}; + +const char * const typec_cc_status_name[] = { + [TYPEC_CC_OPEN] = "open", + [TYPEC_CC_RA] = "ra", + [TYPEC_CC_RD] = "rd", + [TYPEC_CC_RP_DEF] = "rp-def", + [TYPEC_CC_RP_1_5] = "rp-1.5", + [TYPEC_CC_RP_3_0] = "rp-3.0", +}; + +static inline bool tcpm_cc_is_sink(enum typec_cc_status cc) +{ + return cc == TYPEC_CC_RP_DEF || + cc == TYPEC_CC_RP_1_5 || + cc == TYPEC_CC_RP_3_0; +} + +static inline bool tcpm_port_is_sink(struct tcpm_port *port) +{ + bool cc1_is_snk = tcpm_cc_is_sink(port->cc1); + bool cc2_is_snk = tcpm_cc_is_sink(port->cc2); + + return (cc1_is_snk && !cc2_is_snk) || + (cc2_is_snk && !cc1_is_snk); +} + +static inline bool tcpm_cc_is_source(enum typec_cc_status cc) +{ + return cc == TYPEC_CC_RD; +} + +static inline bool tcpm_port_is_source(struct tcpm_port *port) +{ + bool cc1_is_src = tcpm_cc_is_source(port->cc1); + bool cc2_is_src = tcpm_cc_is_source(port->cc2); + + return (cc1_is_src && !cc2_is_src) || + (cc2_is_src && !cc1_is_src); +} + +static inline bool tcpm_try_src(struct tcpm_port *port) +{ + return port->try_role == TYPEC_SOURCE && + port->port_type == TYPEC_PORT_DRP; +} + +static inline void tcpm_reset_event_cnt(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + port->poll_event_cnt = 0; +} + +static enum tcpm_state tcpm_default_state(struct tcpm_port *port) +{ + if (port->port_type == TYPEC_PORT_DRP) { + if (port->try_role == TYPEC_SINK) + return SNK_UNATTACHED; + else if (port->try_role == TYPEC_SOURCE) + return SRC_UNATTACHED; + } else if (port->port_type == TYPEC_PORT_SNK) { + return SNK_UNATTACHED; + } + return SRC_UNATTACHED; +} + +static bool tcpm_port_is_disconnected(struct tcpm_port *port) +{ + return (!port->attached && port->cc1 == TYPEC_CC_OPEN && + port->cc2 == TYPEC_CC_OPEN) || + (port->attached && ((port->polarity == TYPEC_POLARITY_CC1 && + port->cc1 == TYPEC_CC_OPEN) || + (port->polarity == TYPEC_POLARITY_CC2 && + port->cc2 == TYPEC_CC_OPEN))); +} + +static void tcpm_set_cc(struct udevice *dev, enum typec_cc_status cc) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + struct tcpm_port *port = dev_get_uclass_plat(dev); + + dev_dbg(dev, "TCPM: set cc = %d\n", cc); + port->cc_req = cc; + drvops->set_cc(dev, cc); +} + +/* + * Determine RP value to set based on maximum current supported + * by a port if configured as source. + * Returns CC value to report to link partner. + */ +static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port) +{ + const u32 *src_pdo = port->src_pdo; + int nr_pdo = port->nr_src_pdo; + int i; + + /* + * Search for first entry with matching voltage. + * It should report the maximum supported current. + */ + for (i = 0; i < nr_pdo; i++) { + const u32 pdo = src_pdo[i]; + + if (pdo_type(pdo) == PDO_TYPE_FIXED && + pdo_fixed_voltage(pdo) == 5000) { + unsigned int curr = pdo_max_current(pdo); + + if (curr >= 3000) + return TYPEC_CC_RP_3_0; + else if (curr >= 1500) + return TYPEC_CC_RP_1_5; + return TYPEC_CC_RP_DEF; + } + } + + return TYPEC_CC_RP_DEF; +} + +static void tcpm_check_and_run_delayed_work(struct udevice *dev); + +static bool tcpm_transmit_helper(struct udevice *dev) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + struct tcpm_port *port = dev_get_uclass_plat(dev); + + drvops->poll_event(dev); + udelay(500); + tcpm_check_and_run_delayed_work(dev); + return port->tx_complete; +} + +static int tcpm_pd_transmit(struct udevice *dev, + enum tcpm_transmit_type type, + const struct pd_message *msg) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + struct tcpm_port *port = dev_get_uclass_plat(dev); + u32 timeout_us = PD_T_TCPC_TX_TIMEOUT * 1000; + bool tx_complete; + int ret; + + if (msg) + dev_dbg(dev, "TCPM: PD TX, header: %#x\n", + le16_to_cpu(msg->header)); + else + dev_dbg(dev, "TCPM: PD TX, type: %#x\n", type); + + port->tx_complete = false; + ret = drvops->pd_transmit(dev, type, msg, port->negotiated_rev); + if (ret < 0) + return ret; + + /* + * At this point we basically need to block until the TCPM controller + * returns successful transmission. Since this is usually done using + * the generic interrupt status bits, we poll for any events. That + * will clear the interrupt status, so we also need to process any + * of the incoming events. This means we will do more processing and + * thus let's give everything a bit more time. + */ + timeout_us *= 5; + ret = read_poll_timeout(tcpm_transmit_helper, tx_complete, + !tx_complete, false, timeout_us, dev); + if (ret < 0) { + dev_err(dev, "TCPM: PD transmit data failed: %d\n", ret); + return ret; + } + + switch (port->tx_status) { + case TCPC_TX_SUCCESS: + port->message_id = (port->message_id + 1) & PD_HEADER_ID_MASK; + break; + case TCPC_TX_DISCARDED: + ret = -EAGAIN; + break; + case TCPC_TX_FAILED: + default: + ret = -EIO; + break; + } + + return ret; +} + +void tcpm_pd_transmit_complete(struct udevice *dev, + enum tcpm_transmit_status status) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + dev_dbg(dev, "TCPM: PD TX complete, status: %u\n", status); + tcpm_reset_event_cnt(dev); + port->tx_status = status; + port->tx_complete = true; +} + +static int tcpm_set_polarity(struct udevice *dev, + enum typec_cc_polarity polarity) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + int ret; + + dev_dbg(dev, "TCPM: set polarity = %d\n", polarity); + + if (drvops->set_polarity) { + ret = drvops->set_polarity(dev, polarity); + if (ret < 0) + return ret; + } + + port->polarity = polarity; + + return 0; +} + +static int tcpm_set_vconn(struct udevice *dev, bool enable) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + struct tcpm_port *port = dev_get_uclass_plat(dev); + int ret; + + dev_dbg(dev, "TCPM: set vconn = %d\n", enable); + + ret = drvops->set_vconn(dev, enable); + if (!ret) + port->vconn_role = enable ? TYPEC_SOURCE : TYPEC_SINK; + + return ret; +} + +static inline u32 tcpm_get_current_limit(struct tcpm_port *port) +{ + switch (port->polarity ? port->cc2 : port->cc1) { + case TYPEC_CC_RP_1_5: + return 1500; + case TYPEC_CC_RP_3_0: + return 3000; + case TYPEC_CC_RP_DEF: + default: + return 0; + } +} + +static int tcpm_set_current_limit(struct udevice *dev, u32 max_ma, u32 mv) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + int ret = -EOPNOTSUPP; + + dev_info(dev, "TCPM: set voltage limit = %u mV\n", mv); + dev_info(dev, "TCPM: set current limit = %u mA\n", max_ma); + + port->supply_voltage = mv; + port->current_limit = max_ma; + + return ret; +} + +static int tcpm_set_attached_state(struct udevice *dev, bool attached) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + struct tcpm_port *port = dev_get_uclass_plat(dev); + + return drvops->set_roles(dev, attached, port->pwr_role, + port->data_role); +} + +static int tcpm_set_roles(struct udevice *dev, bool attached, + enum typec_role role, enum typec_data_role data) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + struct tcpm_port *port = dev_get_uclass_plat(dev); + int ret; + + ret = drvops->set_roles(dev, attached, role, data); + if (ret < 0) + return ret; + + port->pwr_role = role; + port->data_role = data; + + return 0; +} + +static int tcpm_pd_send_source_caps(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + struct pd_message msg; + int i; + + memset(&msg, 0, sizeof(msg)); + + if (!port->nr_src_pdo) { + /* No source capabilities defined, sink only */ + msg.header = PD_HEADER_LE(PD_CTRL_REJECT, + port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, 0); + } else { + msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP, + port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, + port->nr_src_pdo); + } + + for (i = 0; i < port->nr_src_pdo; i++) + msg.payload[i] = cpu_to_le32(port->src_pdo[i]); + + return tcpm_pd_transmit(dev, TCPC_TX_SOP, &msg); +} + +static int tcpm_pd_send_sink_caps(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + struct pd_message msg; + unsigned int i; + + memset(&msg, 0, sizeof(msg)); + + if (!port->nr_snk_pdo) { + /* No sink capabilities defined, source only */ + msg.header = PD_HEADER_LE(PD_CTRL_REJECT, + port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, 0); + } else { + msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP, + port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, + port->nr_snk_pdo); + } + + for (i = 0; i < port->nr_snk_pdo; i++) + msg.payload[i] = cpu_to_le32(port->snk_pdo[i]); + + return tcpm_pd_transmit(dev, TCPC_TX_SOP, &msg); +} + +static void tcpm_state_machine(struct udevice *dev); + +static inline void tcpm_timer_uninit(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + port->delay_target = 0; +} + +static void tcpm_timer_init(struct udevice *dev, uint32_t ms) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + unsigned long time_us = ms * 1000; + + port->delay_target = timer_get_us() + time_us; +} + +static void tcpm_check_and_run_delayed_work(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + /* no delayed state changes scheduled */ + if (port->delay_target == 0) + return; + + /* it's not yet time */ + if (timer_get_us() < port->delay_target) + return; + + tcpm_timer_uninit(dev); + tcpm_state_machine(dev); +} + +static void mod_tcpm_delayed_work(struct udevice *dev, unsigned int delay_ms) +{ + if (delay_ms) { + tcpm_timer_init(dev, delay_ms); + } else { + tcpm_timer_uninit(dev); + tcpm_state_machine(dev); + } +} + +static void tcpm_set_state(struct udevice *dev, enum tcpm_state state, + unsigned int delay_ms) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + if (delay_ms) { + dev_dbg(dev, "TCPM: pending state change %s -> %s @ %u ms [%s]\n", + tcpm_states[port->state], tcpm_states[state], delay_ms, + typec_pd_rev_name[port->negotiated_rev]); + port->delayed_state = state; + mod_tcpm_delayed_work(dev, delay_ms); + port->delay_ms = delay_ms; + } else { + dev_dbg(dev, "TCPM: state change %s -> %s\n", + tcpm_states[port->state], tcpm_states[state]); + port->delayed_state = INVALID_STATE; + port->prev_state = port->state; + port->state = state; + /* + * Don't re-queue the state machine work item if we're currently + * in the state machine and we're immediately changing states. + * tcpm_state_machine_work() will continue running the state + * machine. + */ + if (!port->state_machine_running) + mod_tcpm_delayed_work(dev, 0); + } +} + +static void tcpm_set_state_cond(struct udevice *dev, enum tcpm_state state, + unsigned int delay_ms) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + if (port->enter_state == port->state) + tcpm_set_state(dev, state, delay_ms); + else + dev_dbg(dev, "TCPM: skipped %sstate change %s -> %s [%u ms], context state %s [%s]\n", + delay_ms ? "delayed " : "", + tcpm_states[port->state], tcpm_states[state], + delay_ms, tcpm_states[port->enter_state], + typec_pd_rev_name[port->negotiated_rev]); +} + +static void tcpm_queue_message(struct udevice *dev, + enum pd_msg_request message) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + port->queued_message = message; + mod_tcpm_delayed_work(dev, 0); +} + +enum pdo_err { + PDO_NO_ERR, + PDO_ERR_NO_VSAFE5V, + PDO_ERR_VSAFE5V_NOT_FIRST, + PDO_ERR_PDO_TYPE_NOT_IN_ORDER, + PDO_ERR_FIXED_NOT_SORTED, + PDO_ERR_VARIABLE_BATT_NOT_SORTED, + PDO_ERR_DUPE_PDO, + PDO_ERR_PPS_APDO_NOT_SORTED, + PDO_ERR_DUPE_PPS_APDO, +}; + +static const char * const pdo_err_msg[] = { + [PDO_ERR_NO_VSAFE5V] = + " err: source/sink caps should at least have vSafe5V", + [PDO_ERR_VSAFE5V_NOT_FIRST] = + " err: vSafe5V Fixed Supply Object Shall always be the first object", + [PDO_ERR_PDO_TYPE_NOT_IN_ORDER] = + " err: PDOs should be in the following order: Fixed; Battery; Variable", + [PDO_ERR_FIXED_NOT_SORTED] = + " err: Fixed supply pdos should be in increasing order of their fixed voltage", + [PDO_ERR_VARIABLE_BATT_NOT_SORTED] = + " err: Variable/Battery supply pdos should be in increasing order of their minimum voltage", + [PDO_ERR_DUPE_PDO] = + " err: Variable/Batt supply pdos cannot have same min/max voltage", + [PDO_ERR_PPS_APDO_NOT_SORTED] = + " err: Programmable power supply apdos should be in increasing order of their maximum voltage", + [PDO_ERR_DUPE_PPS_APDO] = + " err: Programmable power supply apdos cannot have same min/max voltage and max current", +}; + +static enum pdo_err tcpm_caps_err(struct udevice *dev, const u32 *pdo, + unsigned int nr_pdo) +{ + unsigned int i; + + /* Should at least contain vSafe5v */ + if (nr_pdo < 1) + return PDO_ERR_NO_VSAFE5V; + + /* The vSafe5V Fixed Supply Object Shall always be the first object */ + if (pdo_type(pdo[0]) != PDO_TYPE_FIXED || + pdo_fixed_voltage(pdo[0]) != VSAFE5V) + return PDO_ERR_VSAFE5V_NOT_FIRST; + + for (i = 1; i < nr_pdo; i++) { + if (pdo_type(pdo[i]) < pdo_type(pdo[i - 1])) { + return PDO_ERR_PDO_TYPE_NOT_IN_ORDER; + } else if (pdo_type(pdo[i]) == pdo_type(pdo[i - 1])) { + enum pd_pdo_type type = pdo_type(pdo[i]); + + switch (type) { + /* + * The remaining Fixed Supply Objects, if + * present, shall be sent in voltage order; + * lowest to highest. + */ + case PDO_TYPE_FIXED: + if (pdo_fixed_voltage(pdo[i]) <= + pdo_fixed_voltage(pdo[i - 1])) + return PDO_ERR_FIXED_NOT_SORTED; + break; + /* + * The Battery Supply Objects and Variable + * supply, if present shall be sent in Minimum + * Voltage order; lowest to highest. + */ + case PDO_TYPE_VAR: + case PDO_TYPE_BATT: + if (pdo_min_voltage(pdo[i]) < + pdo_min_voltage(pdo[i - 1])) + return PDO_ERR_VARIABLE_BATT_NOT_SORTED; + else if ((pdo_min_voltage(pdo[i]) == + pdo_min_voltage(pdo[i - 1])) && + (pdo_max_voltage(pdo[i]) == + pdo_max_voltage(pdo[i - 1]))) + return PDO_ERR_DUPE_PDO; + break; + /* + * The Programmable Power Supply APDOs, if present, + * shall be sent in Maximum Voltage order; + * lowest to highest. + */ + case PDO_TYPE_APDO: + if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS) + break; + + if (pdo_pps_apdo_max_voltage(pdo[i]) < + pdo_pps_apdo_max_voltage(pdo[i - 1])) + return PDO_ERR_PPS_APDO_NOT_SORTED; + else if (pdo_pps_apdo_min_voltage(pdo[i]) == + pdo_pps_apdo_min_voltage(pdo[i - 1]) && + pdo_pps_apdo_max_voltage(pdo[i]) == + pdo_pps_apdo_max_voltage(pdo[i - 1]) && + pdo_pps_apdo_max_current(pdo[i]) == + pdo_pps_apdo_max_current(pdo[i - 1])) + return PDO_ERR_DUPE_PPS_APDO; + break; + default: + dev_err(dev, "TCPM: Unknown pdo type\n"); + } + } + } + + return PDO_NO_ERR; +} + +static int tcpm_validate_caps(struct udevice *dev, const u32 *pdo, + unsigned int nr_pdo) +{ + enum pdo_err err_index = tcpm_caps_err(dev, pdo, nr_pdo); + + if (err_index != PDO_NO_ERR) { + dev_err(dev, "TCPM:%s\n", pdo_err_msg[err_index]); + return -EINVAL; + } + + return 0; +} + +/* + * PD (data, control) command handling functions + */ +static inline enum tcpm_state ready_state(struct tcpm_port *port) +{ + if (port->pwr_role == TYPEC_SOURCE) + return SRC_READY; + else + return SNK_READY; +} + +static void tcpm_pd_data_request(struct udevice *dev, + const struct pd_message *msg) +{ + enum pd_data_msg_type type = pd_header_type_le(msg->header); + struct tcpm_port *port = dev_get_uclass_plat(dev); + unsigned int cnt = pd_header_cnt_le(msg->header); + unsigned int rev = pd_header_rev_le(msg->header); + unsigned int i; + + switch (type) { + case PD_DATA_SOURCE_CAP: + for (i = 0; i < cnt; i++) + port->source_caps[i] = le32_to_cpu(msg->payload[i]); + + port->nr_source_caps = cnt; + + tcpm_validate_caps(dev, port->source_caps, + port->nr_source_caps); + + /* + * Adjust revision in subsequent message headers, as required, + * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't + * support Rev 1.0 so just do nothing in that scenario. + */ + if (rev == PD_REV10) + break; + + if (rev < PD_MAX_REV) + port->negotiated_rev = rev; + + if ((pdo_type(port->source_caps[0]) == PDO_TYPE_FIXED) && + (port->source_caps[0] & PDO_FIXED_DUAL_ROLE) && + (port->source_caps[0] & PDO_FIXED_DATA_SWAP)) { + /* Dual role power and data, eg: self-powered Type-C */ + port->wait_dr_swap_message = true; + } else { + /* Non-Dual role power, eg: adapter */ + port->wait_dr_swap_message = false; + } + + /* + * This message may be received even if VBUS is not + * present. This is quite unexpected; see USB PD + * specification, sections 8.3.3.6.3.1 and 8.3.3.6.3.2. + * However, at the same time, we must be ready to + * receive this message and respond to it 15ms after + * receiving PS_RDY during power swap operations, no matter + * if VBUS is available or not (USB PD specification, + * section 6.5.9.2). + * So we need to accept the message either way, + * but be prepared to keep waiting for VBUS after it was + * handled. + */ + tcpm_set_state(dev, SNK_NEGOTIATE_CAPABILITIES, 0); + break; + case PD_DATA_REQUEST: + /* + * Adjust revision in subsequent message headers, as required, + * to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't + * support Rev 1.0 so just reject in that scenario. + */ + if (rev == PD_REV10) { + tcpm_queue_message(dev, PD_MSG_CTRL_REJECT); + break; + } + + if (rev < PD_MAX_REV) + port->negotiated_rev = rev; + + port->sink_request = le32_to_cpu(msg->payload[0]); + + tcpm_set_state(dev, SRC_NEGOTIATE_CAPABILITIES, 0); + break; + case PD_DATA_SINK_CAP: + /* We don't do anything with this at the moment... */ + for (i = 0; i < cnt; i++) + port->sink_caps[i] = le32_to_cpu(msg->payload[i]); + + port->nr_sink_caps = cnt; + break; + default: + break; + } +} + +static void tcpm_pd_ctrl_request(struct udevice *dev, + const struct pd_message *msg) +{ + enum pd_ctrl_msg_type type = pd_header_type_le(msg->header); + struct tcpm_port *port = dev_get_uclass_plat(dev); + enum tcpm_state next_state; + + switch (type) { + case PD_CTRL_GOOD_CRC: + case PD_CTRL_PING: + break; + case PD_CTRL_GET_SOURCE_CAP: + switch (port->state) { + case SRC_READY: + case SNK_READY: + tcpm_queue_message(dev, PD_MSG_DATA_SOURCE_CAP); + break; + default: + tcpm_queue_message(dev, PD_MSG_CTRL_REJECT); + break; + } + break; + case PD_CTRL_GET_SINK_CAP: + switch (port->state) { + case SRC_READY: + case SNK_READY: + tcpm_queue_message(dev, PD_MSG_DATA_SINK_CAP); + break; + default: + tcpm_queue_message(dev, PD_MSG_CTRL_REJECT); + break; + } + break; + case PD_CTRL_GOTO_MIN: + break; + case PD_CTRL_PS_RDY: + switch (port->state) { + case SNK_TRANSITION_SINK: + if (port->vbus_present) { + tcpm_set_current_limit(dev, + port->req_current_limit, + port->req_supply_voltage); + port->explicit_contract = true; + tcpm_set_state(dev, SNK_READY, 0); + } else { + /* + * Seen after power swap. Keep waiting for VBUS + * in a transitional state. + */ + tcpm_set_state(dev, + SNK_TRANSITION_SINK_VBUS, 0); + } + break; + default: + break; + } + break; + case PD_CTRL_REJECT: + case PD_CTRL_WAIT: + case PD_CTRL_NOT_SUPP: + switch (port->state) { + case SNK_NEGOTIATE_CAPABILITIES: + /* USB PD specification, Figure 8-43 */ + if (port->explicit_contract) + next_state = SNK_READY; + else + next_state = SNK_WAIT_CAPABILITIES; + + tcpm_set_state(dev, next_state, 0); + break; + default: + break; + } + break; + case PD_CTRL_ACCEPT: + switch (port->state) { + case SNK_NEGOTIATE_CAPABILITIES: + tcpm_set_state(dev, SNK_TRANSITION_SINK, 0); + break; + case SOFT_RESET_SEND: + port->message_id = 0; + port->rx_msgid = -1; + if (port->pwr_role == TYPEC_SOURCE) + next_state = SRC_SEND_CAPABILITIES; + else + next_state = SNK_WAIT_CAPABILITIES; + tcpm_set_state(dev, next_state, 0); + break; + default: + break; + } + break; + case PD_CTRL_SOFT_RESET: + tcpm_set_state(dev, SOFT_RESET, 0); + break; + case PD_CTRL_DR_SWAP: + if (port->port_type != TYPEC_PORT_DRP) { + tcpm_queue_message(dev, PD_MSG_CTRL_REJECT); + break; + } + /* + * 6.3.9: If an alternate mode is active, a request to swap + * alternate modes shall trigger a port reset. + */ + switch (port->state) { + case SRC_READY: + case SNK_READY: + tcpm_set_state(dev, DR_SWAP_ACCEPT, 0); + break; + default: + tcpm_queue_message(dev, PD_MSG_CTRL_WAIT); + break; + } + break; + case PD_CTRL_PR_SWAP: + case PD_CTRL_VCONN_SWAP: + case PD_CTRL_GET_SOURCE_CAP_EXT: + case PD_CTRL_GET_STATUS: + case PD_CTRL_FR_SWAP: + case PD_CTRL_GET_PPS_STATUS: + case PD_CTRL_GET_COUNTRY_CODES: + /* Currently not supported */ + dev_err(dev, "TCPM: Currently not supported type %#x\n", type); + tcpm_queue_message(dev, PD_MSG_CTRL_NOT_SUPP); + break; + default: + dev_err(dev, "TCPM: Unrecognized ctrl message type %#x\n", type); + break; + } +} + +static void tcpm_pd_rx_handler(struct udevice *dev, + const struct pd_message *msg) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + unsigned int cnt = pd_header_cnt_le(msg->header); + bool remote_is_host, local_is_host; + + dev_dbg(dev, "TCPM: PD RX, header: %#x [%d]\n", + le16_to_cpu(msg->header), port->attached); + + if (port->attached) { + enum pd_ctrl_msg_type type = pd_header_type_le(msg->header); + unsigned int msgid = pd_header_msgid_le(msg->header); + + /* + * USB PD standard, 6.6.1.2: + * "... if MessageID value in a received Message is the + * same as the stored value, the receiver shall return a + * GoodCRC Message with that MessageID value and drop + * the Message (this is a retry of an already received + * Message). Note: this shall not apply to the Soft_Reset + * Message which always has a MessageID value of zero." + */ + if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET) + return; + port->rx_msgid = msgid; + + /* + * If both ends believe to be DFP/host, we have a data role + * mismatch. + */ + remote_is_host = !!(le16_to_cpu(msg->header) & PD_HEADER_DATA_ROLE); + local_is_host = port->data_role == TYPEC_HOST; + if (remote_is_host == local_is_host) { + dev_err(dev, "TCPM: data role mismatch, initiating error recovery\n"); + tcpm_set_state(dev, ERROR_RECOVERY, 0); + } else { + if (cnt) + tcpm_pd_data_request(dev, msg); + else + tcpm_pd_ctrl_request(dev, msg); + } + } +} + +void tcpm_pd_receive(struct udevice *dev, const struct pd_message *msg) +{ + tcpm_reset_event_cnt(dev); + tcpm_pd_rx_handler(dev, msg); +} + +static int tcpm_pd_send_control(struct udevice *dev, + enum pd_ctrl_msg_type type) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + struct pd_message msg; + + memset(&msg, 0, sizeof(msg)); + msg.header = PD_HEADER_LE(type, port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, 0); + + return tcpm_pd_transmit(dev, TCPC_TX_SOP, &msg); +} + +/* + * Send queued message without affecting state. + * Return true if state machine should go back to sleep, + * false otherwise. + */ +static bool tcpm_send_queued_message(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + enum pd_msg_request queued_message; + int max_messages = 100; + + do { + queued_message = port->queued_message; + port->queued_message = PD_MSG_NONE; + max_messages--; + + switch (queued_message) { + case PD_MSG_CTRL_WAIT: + tcpm_pd_send_control(dev, PD_CTRL_WAIT); + break; + case PD_MSG_CTRL_REJECT: + tcpm_pd_send_control(dev, PD_CTRL_REJECT); + break; + case PD_MSG_CTRL_NOT_SUPP: + tcpm_pd_send_control(dev, PD_CTRL_NOT_SUPP); + break; + case PD_MSG_DATA_SINK_CAP: + tcpm_pd_send_sink_caps(dev); + break; + case PD_MSG_DATA_SOURCE_CAP: + tcpm_pd_send_source_caps(dev); + break; + default: + break; + } + } while (max_messages > 0 && port->queued_message != PD_MSG_NONE); + + if (!max_messages) + dev_err(dev, "Aborted sending of too many queued messages\n"); + + return false; +} + +static int tcpm_pd_check_request(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + u32 pdo, rdo = port->sink_request; + unsigned int max, op, pdo_max, index; + enum pd_pdo_type type; + + index = rdo_index(rdo); + if (!index || index > port->nr_src_pdo) + return -EINVAL; + + pdo = port->src_pdo[index - 1]; + type = pdo_type(pdo); + switch (type) { + case PDO_TYPE_FIXED: + case PDO_TYPE_VAR: + max = rdo_max_current(rdo); + op = rdo_op_current(rdo); + pdo_max = pdo_max_current(pdo); + + if (op > pdo_max) + return -EINVAL; + if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH)) + return -EINVAL; + + if (type == PDO_TYPE_FIXED) + dev_dbg(dev, "TCPM: Requested %u mV, %u mA for %u / %u mA\n", + pdo_fixed_voltage(pdo), pdo_max, op, max); + else + dev_dbg(dev, "TCPM: Requested %u -> %u mV, %u mA for %u / %u mA\n", + pdo_min_voltage(pdo), pdo_max_voltage(pdo), + pdo_max, op, max); + break; + case PDO_TYPE_BATT: + max = rdo_max_power(rdo); + op = rdo_op_power(rdo); + pdo_max = pdo_max_power(pdo); + + if (op > pdo_max) + return -EINVAL; + if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH)) + return -EINVAL; + dev_info(dev, "TCPM: Requested %u -> %u mV, %u mW for %u / %u mW\n", + pdo_min_voltage(pdo), pdo_max_voltage(pdo), + pdo_max, op, max); + break; + default: + return -EINVAL; + } + + return 0; +} + +#define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y)) +#define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y)) + +static int tcpm_pd_select_pdo(struct udevice *dev, int *sink_pdo, + int *src_pdo) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0, + max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0, + min_snk_mv = 0; + int ret = -EINVAL; + + /* + * Select the source PDO providing the most power which has a + * matchig sink cap. + */ + for (i = 0; i < port->nr_source_caps; i++) { + u32 pdo = port->source_caps[i]; + enum pd_pdo_type type = pdo_type(pdo); + + switch (type) { + case PDO_TYPE_FIXED: + max_src_mv = pdo_fixed_voltage(pdo); + min_src_mv = max_src_mv; + break; + case PDO_TYPE_BATT: + case PDO_TYPE_VAR: + max_src_mv = pdo_max_voltage(pdo); + min_src_mv = pdo_min_voltage(pdo); + break; + case PDO_TYPE_APDO: + continue; + default: + dev_err(dev, "TCPM: Invalid source PDO type, ignoring\n"); + continue; + } + + switch (type) { + case PDO_TYPE_FIXED: + case PDO_TYPE_VAR: + src_ma = pdo_max_current(pdo); + src_mw = src_ma * min_src_mv / 1000; + break; + case PDO_TYPE_BATT: + src_mw = pdo_max_power(pdo); + break; + case PDO_TYPE_APDO: + continue; + default: + dev_err(dev, "TCPM: Invalid source PDO type, ignoring\n"); + continue; + } + + for (j = 0; j < port->nr_snk_pdo; j++) { + pdo = port->snk_pdo[j]; + + switch (pdo_type(pdo)) { + case PDO_TYPE_FIXED: + max_snk_mv = pdo_fixed_voltage(pdo); + min_snk_mv = max_snk_mv; + break; + case PDO_TYPE_BATT: + case PDO_TYPE_VAR: + max_snk_mv = pdo_max_voltage(pdo); + min_snk_mv = pdo_min_voltage(pdo); + break; + case PDO_TYPE_APDO: + continue; + default: + dev_err(dev, "TCPM: Invalid sink PDO type, ignoring\n"); + continue; + } + + if (max_src_mv <= max_snk_mv && min_src_mv >= min_snk_mv) { + /* Prefer higher voltages if available */ + if ((src_mw == max_mw && min_src_mv > max_mv) || + src_mw > max_mw) { + *src_pdo = i; + *sink_pdo = j; + max_mw = src_mw; + max_mv = min_src_mv; + ret = 0; + } + } + } + } + + return ret; +} + +static int tcpm_pd_build_request(struct udevice *dev, u32 *rdo) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + unsigned int mv, ma, mw, flags; + unsigned int max_ma, max_mw; + enum pd_pdo_type type; + u32 pdo, matching_snk_pdo; + int src_pdo_index = 0; + int snk_pdo_index = 0; + int ret; + + ret = tcpm_pd_select_pdo(dev, &snk_pdo_index, &src_pdo_index); + if (ret < 0) + return ret; + + pdo = port->source_caps[src_pdo_index]; + matching_snk_pdo = port->snk_pdo[snk_pdo_index]; + type = pdo_type(pdo); + + switch (type) { + case PDO_TYPE_FIXED: + mv = pdo_fixed_voltage(pdo); + break; + case PDO_TYPE_BATT: + case PDO_TYPE_VAR: + mv = pdo_min_voltage(pdo); + break; + default: + dev_err(dev, "TCPM: Invalid PDO selected!\n"); + return -EINVAL; + } + + /* Select maximum available current within the sink pdo's limit */ + if (type == PDO_TYPE_BATT) { + mw = min_power(pdo, matching_snk_pdo); + ma = 1000 * mw / mv; + } else { + ma = min_current(pdo, matching_snk_pdo); + mw = ma * mv / 1000; + } + + flags = RDO_USB_COMM | RDO_NO_SUSPEND; + + /* Set mismatch bit if offered power is less than operating power */ + max_ma = ma; + max_mw = mw; + if (mw < port->operating_snk_mw) { + flags |= RDO_CAP_MISMATCH; + if (type == PDO_TYPE_BATT && + (pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo))) + max_mw = pdo_max_power(matching_snk_pdo); + else if (pdo_max_current(matching_snk_pdo) > + pdo_max_current(pdo)) + max_ma = pdo_max_current(matching_snk_pdo); + } + + dev_dbg(dev, "TCPM: cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d\n", + port->cc_req, port->cc1, port->cc2, port->vbus_source, + port->vconn_role == TYPEC_SOURCE ? "source" : "sink", + port->polarity); + + if (type == PDO_TYPE_BATT) { + *rdo = RDO_BATT(src_pdo_index + 1, mw, max_mw, flags); + + dev_info(dev, "TCPM: requesting PDO %d: %u mV, %u mW%s\n", + src_pdo_index, mv, mw, + flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); + } else { + *rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags); + + dev_info(dev, "TCPM: requesting PDO %d: %u mV, %u mA%s\n", + src_pdo_index, mv, ma, + flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); + } + + port->req_current_limit = ma; + port->req_supply_voltage = mv; + + return 0; +} + +static int tcpm_pd_send_request(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + struct pd_message msg; + int ret; + u32 rdo; + + ret = tcpm_pd_build_request(dev, &rdo); + if (ret < 0) + return ret; + + memset(&msg, 0, sizeof(msg)); + msg.header = PD_HEADER_LE(PD_DATA_REQUEST, + port->pwr_role, + port->data_role, + port->negotiated_rev, + port->message_id, 1); + msg.payload[0] = cpu_to_le32(rdo); + + return tcpm_pd_transmit(dev, TCPC_TX_SOP, &msg); +} + +static int tcpm_set_vbus(struct udevice *dev, bool enable) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + int ret; + + if (enable && port->vbus_charge) + return -EINVAL; + + dev_dbg(dev, "TCPM: set vbus = %d charge = %d\n", + enable, port->vbus_charge); + + ret = drvops->set_vbus(dev, enable, port->vbus_charge); + if (ret < 0) + return ret; + + port->vbus_source = enable; + return 0; +} + +static int tcpm_set_charge(struct udevice *dev, bool charge) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + struct tcpm_port *port = dev_get_uclass_plat(dev); + int ret; + + if (charge && port->vbus_source) + return -EINVAL; + + if (charge != port->vbus_charge) { + dev_dbg(dev, "TCPM: set vbus = %d charge = %d\n", + port->vbus_source, charge); + ret = drvops->set_vbus(dev, port->vbus_source, + charge); + if (ret < 0) + return ret; + } + port->vbus_charge = charge; + return 0; +} + +static bool tcpm_start_toggling(struct udevice *dev, enum typec_cc_status cc) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + struct tcpm_port *port = dev_get_uclass_plat(dev); + int ret; + + if (!drvops->start_toggling) + return false; + + dev_dbg(dev, "TCPM: Start toggling\n"); + ret = drvops->start_toggling(dev, port->port_type, cc); + return ret == 0; +} + +static int tcpm_init_vbus(struct udevice *dev) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + struct tcpm_port *port = dev_get_uclass_plat(dev); + int ret; + + ret = drvops->set_vbus(dev, false, false); + port->vbus_source = false; + port->vbus_charge = false; + return ret; +} + +static int tcpm_init_vconn(struct udevice *dev) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + struct tcpm_port *port = dev_get_uclass_plat(dev); + int ret; + + ret = drvops->set_vconn(dev, false); + port->vconn_role = TYPEC_SINK; + return ret; +} + +static inline void tcpm_typec_connect(struct tcpm_port *port) +{ + if (!port->connected) + port->connected = true; +} + +static int tcpm_src_attach(struct udevice *dev) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + struct tcpm_port *port = dev_get_uclass_plat(dev); + enum typec_cc_polarity polarity = + port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2 + : TYPEC_POLARITY_CC1; + int ret; + + if (port->attached) + return 0; + + ret = tcpm_set_polarity(dev, polarity); + if (ret < 0) + return ret; + + ret = tcpm_set_roles(dev, true, TYPEC_SOURCE, TYPEC_HOST); + if (ret < 0) + return ret; + + ret = drvops->set_pd_rx(dev, true); + if (ret < 0) + goto out_disable_mux; + + /* + * USB Type-C specification, version 1.2, + * chapter 4.5.2.2.8.1 (Attached.SRC Requirements) + * Enable VCONN only if the non-RD port is set to RA. + */ + if ((polarity == TYPEC_POLARITY_CC1 && port->cc2 == TYPEC_CC_RA) || + (polarity == TYPEC_POLARITY_CC2 && port->cc1 == TYPEC_CC_RA)) { + ret = tcpm_set_vconn(dev, true); + if (ret < 0) + goto out_disable_pd; + } + + ret = tcpm_set_vbus(dev, true); + if (ret < 0) + goto out_disable_vconn; + + port->pd_capable = false; + + port->partner = NULL; + + port->attached = true; + + return 0; + +out_disable_vconn: + tcpm_set_vconn(dev, false); +out_disable_pd: + drvops->set_pd_rx(dev, false); +out_disable_mux: + dev_err(dev, "TCPM: CC connected in %s as DFP\n", + polarity ? "CC2" : "CC1"); + return 0; +} + +static inline void tcpm_typec_disconnect(struct tcpm_port *port) +{ + if (port->connected) { + port->partner = NULL; + port->connected = false; + } +} + +static void tcpm_reset_port(struct udevice *dev) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + struct tcpm_port *port = dev_get_uclass_plat(dev); + + tcpm_timer_uninit(dev); + tcpm_typec_disconnect(port); + tcpm_reset_event_cnt(dev); + port->wait_dr_swap_message = false; + port->attached = false; + port->pd_capable = false; + + /* + * First Rx ID should be 0; set this to a sentinel of -1 so that + * we can check tcpm_pd_rx_handler() if we had seen it before. + */ + port->rx_msgid = -1; + + drvops->set_pd_rx(dev, false); + tcpm_init_vbus(dev); /* also disables charging */ + tcpm_init_vconn(dev); + tcpm_set_current_limit(dev, 0, 0); + tcpm_set_polarity(dev, TYPEC_POLARITY_CC1); + tcpm_set_attached_state(dev, false); + port->nr_sink_caps = 0; +} + +static void tcpm_detach(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + if (tcpm_port_is_disconnected(port)) + port->hard_reset_count = 0; + + if (!port->attached) + return; + + tcpm_reset_port(dev); +} + +static void tcpm_src_detach(struct udevice *dev) +{ + tcpm_detach(dev); +} + +static int tcpm_snk_attach(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + int ret; + + if (port->attached) + return 0; + + ret = tcpm_set_polarity(dev, port->cc2 != TYPEC_CC_OPEN ? + TYPEC_POLARITY_CC2 : TYPEC_POLARITY_CC1); + if (ret < 0) + return ret; + + ret = tcpm_set_roles(dev, true, TYPEC_SINK, TYPEC_DEVICE); + if (ret < 0) + return ret; + + port->pd_capable = false; + + port->partner = NULL; + + port->attached = true; + dev_info(dev, "TCPM: CC connected in %s as UFP\n", + port->cc1 != TYPEC_CC_OPEN ? "CC1" : "CC2"); + + return 0; +} + +static void tcpm_snk_detach(struct udevice *dev) +{ + tcpm_detach(dev); +} + +static inline enum tcpm_state hard_reset_state(struct tcpm_port *port) +{ + if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) + return HARD_RESET_SEND; + if (port->pd_capable) + return ERROR_RECOVERY; + if (port->pwr_role == TYPEC_SOURCE) + return SRC_UNATTACHED; + if (port->state == SNK_WAIT_CAPABILITIES) + return SNK_READY; + return SNK_UNATTACHED; +} + +static inline enum tcpm_state unattached_state(struct tcpm_port *port) +{ + if (port->port_type == TYPEC_PORT_DRP) { + if (port->pwr_role == TYPEC_SOURCE) + return SRC_UNATTACHED; + else + return SNK_UNATTACHED; + } else if (port->port_type == TYPEC_PORT_SRC) { + return SRC_UNATTACHED; + } + + return SNK_UNATTACHED; +} + +static void run_state_machine(struct udevice *dev) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + struct tcpm_port *port = dev_get_uclass_plat(dev); + int ret; + + port->enter_state = port->state; + switch (port->state) { + case TOGGLING: + break; + /* SRC states */ + case SRC_UNATTACHED: + tcpm_src_detach(dev); + if (tcpm_start_toggling(dev, tcpm_rp_cc(port))) { + tcpm_set_state(dev, TOGGLING, 0); + break; + } + tcpm_set_cc(dev, tcpm_rp_cc(port)); + if (port->port_type == TYPEC_PORT_DRP) + tcpm_set_state(dev, SNK_UNATTACHED, PD_T_DRP_SNK); + break; + case SRC_ATTACH_WAIT: + if (tcpm_port_is_source(port)) + tcpm_set_state(dev, SRC_ATTACHED, PD_T_CC_DEBOUNCE); + break; + + case SRC_ATTACHED: + ret = tcpm_src_attach(dev); + /* + * Currently, vbus control is not implemented, + * and the SRC detection process cannot be fully implemented. + */ + tcpm_set_state(dev, SRC_READY, 0); + break; + case SRC_STARTUP: + port->caps_count = 0; + port->negotiated_rev = PD_MAX_REV; + port->message_id = 0; + port->rx_msgid = -1; + port->explicit_contract = false; + tcpm_set_state(dev, SRC_SEND_CAPABILITIES, 0); + break; + case SRC_SEND_CAPABILITIES: + port->caps_count++; + if (port->caps_count > PD_N_CAPS_COUNT) { + tcpm_set_state(dev, SRC_READY, 0); + break; + } + ret = tcpm_pd_send_source_caps(dev); + if (ret < 0) { + tcpm_set_state(dev, SRC_SEND_CAPABILITIES, + PD_T_SEND_SOURCE_CAP); + } else { + /* + * Per standard, we should clear the reset counter here. + * However, that can result in state machine hang-ups. + * Reset it only in READY state to improve stability. + */ + /* port->hard_reset_count = 0; */ + port->caps_count = 0; + port->pd_capable = true; + tcpm_set_state_cond(dev, SRC_SEND_CAPABILITIES_TIMEOUT, + PD_T_SEND_SOURCE_CAP); + } + break; + case SRC_SEND_CAPABILITIES_TIMEOUT: + /* + * Error recovery for a PD_DATA_SOURCE_CAP reply timeout. + * + * PD 2.0 sinks are supposed to accept src-capabilities with a + * 3.0 header and simply ignore any src PDOs which the sink does + * not understand such as PPS but some 2.0 sinks instead ignore + * the entire PD_DATA_SOURCE_CAP message, causing contract + * negotiation to fail. + * + * After PD_N_HARD_RESET_COUNT hard-reset attempts, we try + * sending src-capabilities with a lower PD revision to + * make these broken sinks work. + */ + if (port->hard_reset_count < PD_N_HARD_RESET_COUNT) { + tcpm_set_state(dev, HARD_RESET_SEND, 0); + } else if (port->negotiated_rev > PD_REV20) { + port->negotiated_rev--; + port->hard_reset_count = 0; + tcpm_set_state(dev, SRC_SEND_CAPABILITIES, 0); + } else { + tcpm_set_state(dev, hard_reset_state(port), 0); + } + break; + case SRC_NEGOTIATE_CAPABILITIES: + ret = tcpm_pd_check_request(dev); + if (ret < 0) { + tcpm_pd_send_control(dev, PD_CTRL_REJECT); + if (!port->explicit_contract) { + tcpm_set_state(dev, + SRC_WAIT_NEW_CAPABILITIES, 0); + } else { + tcpm_set_state(dev, SRC_READY, 0); + } + } else { + tcpm_pd_send_control(dev, PD_CTRL_ACCEPT); + tcpm_set_state(dev, SRC_TRANSITION_SUPPLY, + PD_T_SRC_TRANSITION); + } + break; + case SRC_TRANSITION_SUPPLY: + /* XXX: regulator_set_voltage(vbus, ...) */ + tcpm_pd_send_control(dev, PD_CTRL_PS_RDY); + port->explicit_contract = true; + tcpm_set_state_cond(dev, SRC_READY, 0); + break; + case SRC_READY: + port->hard_reset_count = 0; + + tcpm_typec_connect(port); + break; + case SRC_WAIT_NEW_CAPABILITIES: + /* Nothing to do... */ + break; + + /* SNK states */ + case SNK_UNATTACHED: + tcpm_snk_detach(dev); + if (tcpm_start_toggling(dev, TYPEC_CC_RD)) { + tcpm_set_state(dev, TOGGLING, 0); + break; + } + tcpm_set_cc(dev, TYPEC_CC_RD); + if (port->port_type == TYPEC_PORT_DRP) + tcpm_set_state(dev, SRC_UNATTACHED, PD_T_DRP_SRC); + break; + case SNK_ATTACH_WAIT: + if ((port->cc1 == TYPEC_CC_OPEN && + port->cc2 != TYPEC_CC_OPEN) || + (port->cc1 != TYPEC_CC_OPEN && + port->cc2 == TYPEC_CC_OPEN)) + tcpm_set_state(dev, SNK_DEBOUNCED, + PD_T_CC_DEBOUNCE); + else if (tcpm_port_is_disconnected(port)) + tcpm_set_state(dev, SNK_UNATTACHED, + PD_T_CC_DEBOUNCE); + break; + case SNK_DEBOUNCED: + if (tcpm_port_is_disconnected(port)) + tcpm_set_state(dev, SNK_UNATTACHED, PD_T_PD_DEBOUNCE); + else if (port->vbus_present) + tcpm_set_state(dev, SNK_ATTACHED, 0); + else + /* Wait for VBUS, but not forever */ + tcpm_set_state(dev, PORT_RESET, PD_T_PS_SOURCE_ON); + break; + case SNK_ATTACHED: + ret = tcpm_snk_attach(dev); + if (ret < 0) + tcpm_set_state(dev, SNK_UNATTACHED, 0); + else + tcpm_set_state(dev, SNK_STARTUP, 0); + break; + case SNK_STARTUP: + port->negotiated_rev = PD_MAX_REV; + port->message_id = 0; + port->rx_msgid = -1; + port->explicit_contract = false; + tcpm_set_state(dev, SNK_DISCOVERY, 0); + break; + case SNK_DISCOVERY: + if (port->vbus_present) { + tcpm_set_current_limit(dev, + tcpm_get_current_limit(port), + 5000); + tcpm_set_charge(dev, true); + tcpm_set_state(dev, SNK_WAIT_CAPABILITIES, 0); + break; + } + /* + * For DRP, timeouts differ. Also, handling is supposed to be + * different and much more complex (dead battery detection; + * see USB power delivery specification, section 8.3.3.6.1.5.1). + */ + tcpm_set_state(dev, hard_reset_state(port), + port->port_type == TYPEC_PORT_DRP ? + PD_T_DB_DETECT : PD_T_NO_RESPONSE); + break; + case SNK_DISCOVERY_DEBOUNCE: + tcpm_set_state(dev, SNK_DISCOVERY_DEBOUNCE_DONE, + PD_T_CC_DEBOUNCE); + break; + case SNK_DISCOVERY_DEBOUNCE_DONE: + tcpm_set_state(dev, unattached_state(port), 0); + break; + case SNK_WAIT_CAPABILITIES: + ret = drvops->set_pd_rx(dev, true); + if (ret < 0) { + tcpm_set_state(dev, SNK_READY, 0); + break; + } + /* + * If VBUS has never been low, and we time out waiting + * for source cap, try a soft reset first, in case we + * were already in a stable contract before this boot. + * Do this only once. + */ + if (port->vbus_never_low) { + port->vbus_never_low = false; + tcpm_set_state(dev, SOFT_RESET_SEND, + PD_T_SINK_WAIT_CAP); + } else { + tcpm_set_state(dev, hard_reset_state(port), + PD_T_SINK_WAIT_CAP); + } + break; + case SNK_NEGOTIATE_CAPABILITIES: + port->pd_capable = true; + port->hard_reset_count = 0; + ret = tcpm_pd_send_request(dev); + if (ret < 0) { + /* Let the Source send capabilities again. */ + tcpm_set_state(dev, SNK_WAIT_CAPABILITIES, 0); + } else { + tcpm_set_state_cond(dev, hard_reset_state(port), + PD_T_SENDER_RESPONSE); + } + break; + case SNK_TRANSITION_SINK: + case SNK_TRANSITION_SINK_VBUS: + tcpm_set_state(dev, hard_reset_state(port), + PD_T_PS_TRANSITION); + break; + case SNK_READY: + port->update_sink_caps = false; + tcpm_typec_connect(port); + /* + * Here poll_event_cnt is cleared, waiting for self-powered Type-C devices + * to send DR_swap Messge until 1s (TCPM_POLL_EVENT_TIME_OUT * 500us)timeout + */ + if (port->wait_dr_swap_message) + tcpm_reset_event_cnt(dev); + + break; + + /* Hard_Reset states */ + case HARD_RESET_SEND: + tcpm_pd_transmit(dev, TCPC_TX_HARD_RESET, NULL); + tcpm_set_state(dev, HARD_RESET_START, 0); + port->wait_dr_swap_message = false; + break; + case HARD_RESET_START: + port->hard_reset_count++; + drvops->set_pd_rx(dev, false); + port->nr_sink_caps = 0; + if (port->pwr_role == TYPEC_SOURCE) + tcpm_set_state(dev, SRC_HARD_RESET_VBUS_OFF, + PD_T_PS_HARD_RESET); + else + tcpm_set_state(dev, SNK_HARD_RESET_SINK_OFF, 0); + break; + case SRC_HARD_RESET_VBUS_OFF: + tcpm_set_vconn(dev, true); + tcpm_set_vbus(dev, false); + tcpm_set_roles(dev, port->self_powered, TYPEC_SOURCE, + TYPEC_HOST); + tcpm_set_state(dev, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER); + break; + case SRC_HARD_RESET_VBUS_ON: + tcpm_set_vconn(dev, true); + tcpm_set_vbus(dev, true); + drvops->set_pd_rx(dev, true); + tcpm_set_attached_state(dev, true); + tcpm_set_state(dev, SRC_UNATTACHED, PD_T_PS_SOURCE_ON); + break; + case SNK_HARD_RESET_SINK_OFF: + tcpm_set_vconn(dev, false); + if (port->pd_capable) + tcpm_set_charge(dev, false); + tcpm_set_roles(dev, port->self_powered, TYPEC_SINK, + TYPEC_DEVICE); + /* + * VBUS may or may not toggle, depending on the adapter. + * If it doesn't toggle, transition to SNK_HARD_RESET_SINK_ON + * directly after timeout. + */ + tcpm_set_state(dev, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V); + break; + case SNK_HARD_RESET_WAIT_VBUS: + /* Assume we're disconnected if VBUS doesn't come back. */ + tcpm_set_state(dev, SNK_UNATTACHED, + PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON); + break; + case SNK_HARD_RESET_SINK_ON: + /* Note: There is no guarantee that VBUS is on in this state */ + /* + * XXX: + * The specification suggests that dual mode ports in sink + * mode should transition to state PE_SRC_Transition_to_default. + * See USB power delivery specification chapter 8.3.3.6.1.3. + * This would mean to + * - turn off VCONN, reset power supply + * - request hardware reset + * - turn on VCONN + * - Transition to state PE_Src_Startup + * SNK only ports shall transition to state Snk_Startup + * (see chapter 8.3.3.3.8). + * Similar, dual-mode ports in source mode should transition + * to PE_SNK_Transition_to_default. + */ + if (port->pd_capable) { + tcpm_set_current_limit(dev, + tcpm_get_current_limit(port), + 5000); + tcpm_set_charge(dev, true); + } + tcpm_set_attached_state(dev, true); + tcpm_set_state(dev, SNK_STARTUP, 0); + break; + + /* Soft_Reset states */ + case SOFT_RESET: + port->message_id = 0; + port->rx_msgid = -1; + tcpm_pd_send_control(dev, PD_CTRL_ACCEPT); + if (port->pwr_role == TYPEC_SOURCE) + tcpm_set_state(dev, SRC_SEND_CAPABILITIES, 0); + else + tcpm_set_state(dev, SNK_WAIT_CAPABILITIES, 0); + break; + case SOFT_RESET_SEND: + port->message_id = 0; + port->rx_msgid = -1; + if (tcpm_pd_send_control(dev, PD_CTRL_SOFT_RESET)) + tcpm_set_state_cond(dev, hard_reset_state(port), 0); + else + tcpm_set_state_cond(dev, hard_reset_state(port), + PD_T_SENDER_RESPONSE); + break; + + /* DR_Swap states */ + case DR_SWAP_ACCEPT: + tcpm_pd_send_control(dev, PD_CTRL_ACCEPT); + tcpm_set_state_cond(dev, DR_SWAP_CHANGE_DR, 0); + break; + case DR_SWAP_CHANGE_DR: + if (port->data_role == TYPEC_HOST) { + tcpm_set_roles(dev, true, port->pwr_role, + TYPEC_DEVICE); + } else { + tcpm_set_roles(dev, true, port->pwr_role, + TYPEC_HOST); + } + /* DR_swap process complete, wait_dr_swap_message is cleared */ + port->wait_dr_swap_message = false; + tcpm_set_state(dev, ready_state(port), 0); + break; + case ERROR_RECOVERY: + tcpm_set_state(dev, PORT_RESET, 0); + break; + case PORT_RESET: + tcpm_reset_port(dev); + if (port->self_powered) + tcpm_set_cc(dev, TYPEC_CC_OPEN); + else + tcpm_set_cc(dev, tcpm_default_state(port) == SNK_UNATTACHED ? + TYPEC_CC_RD : tcpm_rp_cc(port)); + tcpm_set_state(dev, PORT_RESET_WAIT_OFF, + PD_T_ERROR_RECOVERY); + break; + case PORT_RESET_WAIT_OFF: + tcpm_set_state(dev, + tcpm_default_state(port), + port->vbus_present ? PD_T_PS_SOURCE_OFF : 0); + break; + default: + dev_err(dev, "TCPM: Unexpected port state %d\n", port->state); + break; + } +} + +static void tcpm_state_machine(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + enum tcpm_state prev_state; + + mutex_lock(&port->lock); + port->state_machine_running = true; + + if (port->queued_message && tcpm_send_queued_message(dev)) + goto done; + + /* If we were queued due to a delayed state change, update it now */ + if (port->delayed_state) { + dev_dbg(dev, "TCPM: state change %s -> %s [delayed %ld ms]\n", + tcpm_states[port->state], + tcpm_states[port->delayed_state], port->delay_ms); + port->prev_state = port->state; + port->state = port->delayed_state; + port->delayed_state = INVALID_STATE; + } + + /* + * Continue running as long as we have (non-delayed) state changes + * to make. + */ + do { + prev_state = port->state; + run_state_machine(dev); + if (port->queued_message) + tcpm_send_queued_message(dev); + } while (port->state != prev_state && !port->delayed_state); + +done: + port->state_machine_running = false; + mutex_unlock(&port->lock); +} + +static void _tcpm_cc_change(struct udevice *dev, enum typec_cc_status cc1, + enum typec_cc_status cc2) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + enum typec_cc_status old_cc1, old_cc2; + enum tcpm_state new_state; + + old_cc1 = port->cc1; + old_cc2 = port->cc2; + port->cc1 = cc1; + port->cc2 = cc2; + + dev_dbg(dev, "TCPM: CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]\n", + old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state], + port->polarity, + tcpm_port_is_disconnected(port) ? "disconnected" : "connected"); + + switch (port->state) { + case TOGGLING: + if (tcpm_port_is_source(port)) + tcpm_set_state(dev, SRC_ATTACH_WAIT, 0); + else if (tcpm_port_is_sink(port)) + tcpm_set_state(dev, SNK_ATTACH_WAIT, 0); + break; + case SRC_UNATTACHED: + case SRC_ATTACH_WAIT: + if (tcpm_port_is_disconnected(port)) + tcpm_set_state(dev, SRC_UNATTACHED, 0); + else if (cc1 != old_cc1 || cc2 != old_cc2) + tcpm_set_state(dev, SRC_ATTACH_WAIT, 0); + break; + case SRC_ATTACHED: + case SRC_SEND_CAPABILITIES: + case SRC_READY: + if (tcpm_port_is_disconnected(port) || + !tcpm_port_is_source(port)) + tcpm_set_state(dev, SRC_UNATTACHED, 0); + break; + case SNK_UNATTACHED: + if (tcpm_port_is_sink(port)) + tcpm_set_state(dev, SNK_ATTACH_WAIT, 0); + break; + case SNK_ATTACH_WAIT: + if ((port->cc1 == TYPEC_CC_OPEN && + port->cc2 != TYPEC_CC_OPEN) || + (port->cc1 != TYPEC_CC_OPEN && + port->cc2 == TYPEC_CC_OPEN)) + new_state = SNK_DEBOUNCED; + else if (tcpm_port_is_disconnected(port)) + new_state = SNK_UNATTACHED; + else + break; + if (new_state != port->delayed_state) + tcpm_set_state(dev, SNK_ATTACH_WAIT, 0); + break; + case SNK_DEBOUNCED: + if (tcpm_port_is_disconnected(port)) + new_state = SNK_UNATTACHED; + else if (port->vbus_present) + new_state = tcpm_try_src(port) ? INVALID_STATE : SNK_ATTACHED; + else + new_state = SNK_UNATTACHED; + if (new_state != port->delayed_state) + tcpm_set_state(dev, SNK_DEBOUNCED, 0); + break; + case SNK_READY: + if (tcpm_port_is_disconnected(port)) + tcpm_set_state(dev, unattached_state(port), 0); + else if (!port->pd_capable && + (cc1 != old_cc1 || cc2 != old_cc2)) + tcpm_set_current_limit(dev, + tcpm_get_current_limit(port), + 5000); + break; + + case SNK_DISCOVERY: + /* CC line is unstable, wait for debounce */ + if (tcpm_port_is_disconnected(port)) + tcpm_set_state(dev, SNK_DISCOVERY_DEBOUNCE, 0); + break; + case SNK_DISCOVERY_DEBOUNCE: + break; + + case PORT_RESET: + case PORT_RESET_WAIT_OFF: + /* + * State set back to default mode once the timer completes. + * Ignore CC changes here. + */ + break; + default: + /* + * While acting as sink and auto vbus discharge is enabled, Allow disconnect + * to be driven by vbus disconnect. + */ + if (tcpm_port_is_disconnected(port)) + tcpm_set_state(dev, unattached_state(port), 0); + break; + } +} + +static void _tcpm_pd_vbus_on(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + dev_dbg(dev, "TCPM: VBUS on event\n"); + port->vbus_present = true; + /* + * When vbus_present is true i.e. Voltage at VBUS is greater than VSAFE5V implicitly + * states that vbus is not at VSAFE0V, hence clear the vbus_vsafe0v flag here. + */ + port->vbus_vsafe0v = false; + + switch (port->state) { + case SNK_TRANSITION_SINK_VBUS: + port->explicit_contract = true; + tcpm_set_state(dev, SNK_READY, 0); + break; + case SNK_DISCOVERY: + tcpm_set_state(dev, SNK_DISCOVERY, 0); + break; + case SNK_DEBOUNCED: + tcpm_set_state(dev, SNK_ATTACHED, 0); + break; + case SNK_HARD_RESET_WAIT_VBUS: + tcpm_set_state(dev, SNK_HARD_RESET_SINK_ON, 0); + break; + case SRC_ATTACHED: + tcpm_set_state(dev, SRC_STARTUP, 0); + break; + case SRC_HARD_RESET_VBUS_ON: + tcpm_set_state(dev, SRC_STARTUP, 0); + break; + + case PORT_RESET: + case PORT_RESET_WAIT_OFF: + /* + * State set back to default mode once the timer completes. + * Ignore vbus changes here. + */ + break; + + default: + break; + } +} + +static void _tcpm_pd_vbus_off(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + dev_dbg(dev, "TCPM: VBUS off event\n"); + port->vbus_present = false; + port->vbus_never_low = false; + switch (port->state) { + case SNK_HARD_RESET_SINK_OFF: + tcpm_set_state(dev, SNK_HARD_RESET_WAIT_VBUS, 0); + break; + case HARD_RESET_SEND: + break; + case SNK_ATTACH_WAIT: + tcpm_set_state(dev, SNK_UNATTACHED, 0); + break; + + case SNK_NEGOTIATE_CAPABILITIES: + break; + + case PORT_RESET_WAIT_OFF: + tcpm_set_state(dev, tcpm_default_state(port), 0); + break; + + case PORT_RESET: + /* + * State set back to default mode once the timer completes. + * Ignore vbus changes here. + */ + break; + + default: + if (port->pwr_role == TYPEC_SINK && port->attached) + tcpm_set_state(dev, SNK_UNATTACHED, 0); + break; + } +} + +void tcpm_cc_change(struct udevice *dev) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + enum typec_cc_status cc1, cc2; + + tcpm_reset_event_cnt(dev); + if (drvops->get_cc(dev, &cc1, &cc2) == 0) + _tcpm_cc_change(dev, cc1, cc2); +} + +void tcpm_vbus_change(struct udevice *dev) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + bool vbus; + + tcpm_reset_event_cnt(dev); + vbus = drvops->get_vbus(dev); + if (vbus) + _tcpm_pd_vbus_on(dev); + else + _tcpm_pd_vbus_off(dev); +} + +void tcpm_pd_hard_reset(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + + tcpm_reset_event_cnt(dev); + dev_dbg(dev, "TCPM: Received hard reset\n"); + + /* If a hard reset message is received during the port reset process, + * we should ignore it, that is, do not set port->state to HARD_RESET_START. + */ + if (port->state == PORT_RESET || port->state == PORT_RESET_WAIT_OFF) + return; + + /* + * If we keep receiving hard reset requests, executing the hard reset + * must have failed. Revert to error recovery if that happens. + */ + tcpm_set_state(dev, + port->hard_reset_count < PD_N_HARD_RESET_COUNT ? + HARD_RESET_START : ERROR_RECOVERY, + 0); +} + +static void tcpm_init(struct udevice *dev) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + struct tcpm_port *port = dev_get_uclass_plat(dev); + enum typec_cc_status cc1, cc2; + + drvops->init(dev); + + tcpm_reset_port(dev); + + /* + * XXX + * Should possibly wait for VBUS to settle if it was enabled locally + * since tcpm_reset_port() will disable VBUS. + */ + port->vbus_present = drvops->get_vbus(dev); + if (port->vbus_present) + port->vbus_never_low = true; + + /* + * 1. When vbus_present is true, voltage on VBUS is already at VSAFE5V. + * So implicitly vbus_vsafe0v = false. + * + * 2. When vbus_present is false and TCPC does NOT support querying + * vsafe0v status, then, it's best to assume vbus is at VSAFE0V i.e. + * vbus_vsafe0v is true. + * + * 3. When vbus_present is false and TCPC does support querying vsafe0v, + * then, query tcpc for vsafe0v status. + */ + if (port->vbus_present) + port->vbus_vsafe0v = false; + else + port->vbus_vsafe0v = true; + + tcpm_set_state(dev, tcpm_default_state(port), 0); + + if (drvops->get_cc(dev, &cc1, &cc2) == 0) + _tcpm_cc_change(dev, cc1, cc2); +} + +static int tcpm_fw_get_caps(struct udevice *dev) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + struct tcpm_port *port = dev_get_uclass_plat(dev); + ofnode node; + const char *cap_str; + int ret; + u32 mw; + + ret = drvops->get_connector_node(dev, &node); + if (ret) + return ret; + + cap_str = ofnode_read_string(node, "power-role"); + if (!cap_str) + return -EINVAL; + + if (!strcmp("dual", cap_str)) + port->typec_type = TYPEC_PORT_DRP; + else if (!strcmp("source", cap_str)) + port->typec_type = TYPEC_PORT_SRC; + else if (!strcmp("sink", cap_str)) + port->typec_type = TYPEC_PORT_SNK; + else + return -EINVAL; + + port->port_type = port->typec_type; + + if (port->port_type == TYPEC_PORT_SNK) + goto sink; + + /* Get source pdos */ + ret = ofnode_read_size(node, "source-pdos") / sizeof(u32); + if (ret <= 0) + return -EINVAL; + + port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS); + ret = ofnode_read_u32_array(node, "source-pdos", + port->src_pdo, port->nr_src_pdo); + if (ret || tcpm_validate_caps(dev, port->src_pdo, port->nr_src_pdo)) + return -EINVAL; + + if (port->port_type == TYPEC_PORT_SRC) + return 0; + + /* Get the preferred power role for DRP */ + cap_str = ofnode_read_string(node, "try-power-role"); + if (!cap_str) + return -EINVAL; + + if (!strcmp("sink", cap_str)) + port->typec_prefer_role = TYPEC_SINK; + else if (!strcmp("source", cap_str)) + port->typec_prefer_role = TYPEC_SOURCE; + else + return -EINVAL; + + if (port->typec_prefer_role < 0) + return -EINVAL; +sink: + /* Get sink pdos */ + ret = ofnode_read_size(node, "sink-pdos") / sizeof(u32); + if (ret <= 0) + return -EINVAL; + + port->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS); + ret = ofnode_read_u32_array(node, "sink-pdos", + port->snk_pdo, port->nr_snk_pdo); + if (ret || tcpm_validate_caps(dev, port->snk_pdo, port->nr_snk_pdo)) + return -EINVAL; + + if (ofnode_read_u32_array(node, "op-sink-microwatt", &mw, 1)) + return -EINVAL; + port->operating_snk_mw = mw / 1000; + + port->self_powered = ofnode_read_bool(node, "self-powered"); + + return 0; +} + +static int tcpm_port_init(struct udevice *dev) +{ + struct tcpm_port *port = dev_get_uclass_plat(dev); + int err; + + err = tcpm_fw_get_caps(dev); + if (err < 0) { + dev_err(dev, "TCPM: please check the dts config: %d\n", err); + return err; + } + + port->try_role = port->typec_prefer_role; + port->port_type = port->typec_type; + + tcpm_init(dev); + + dev_info(dev, "TCPM: init finished\n"); + + return 0; +} + +static void tcpm_poll_event(struct udevice *dev) +{ + const struct dm_tcpm_ops *drvops = dev_get_driver_ops(dev); + struct tcpm_port *port = dev_get_uclass_plat(dev); + + if (!drvops->get_vbus(dev)) + return; + + while (port->poll_event_cnt < TCPM_POLL_EVENT_TIME_OUT) { + if (!port->wait_dr_swap_message && + (port->state == SNK_READY || port->state == SRC_READY)) + break; + + drvops->poll_event(dev); + port->poll_event_cnt++; + udelay(500); + tcpm_check_and_run_delayed_work(dev); + } + + if (port->state != SNK_READY && port->state != SRC_READY) + dev_warn(dev, "TCPM: exit in state %s\n", + tcpm_states[port->state]); + + /* + * At this time, call the callback function of the respective pd chip + * to enter the low-power mode. In order to reduce the time spent on + * the PD chip driver as much as possible, the tcpm framework does not + * fully process the communication initiated by the device,so it should + * be noted that we can disable the internal oscillator, etc., but do + * not turn off the power of the transceiver module, otherwise the + * self-powered Type-C device will initiate a Message(eg: self-powered + * Type-C hub initiates a SINK capability request(PD_CTRL_GET_SINK_CAP)) + * and the pd chip cannot reply to GoodCRC, causing the self-powered Type-C + * device to switch vbus to vSafe5v, or even turn off vbus. + */ + if (!drvops->enter_low_power_mode) + return; + + if (drvops->enter_low_power_mode(dev, port->attached, port->pd_capable)) + dev_err(dev, "TCPM: failed to enter low power\n"); + else + dev_info(dev, "TCPM: PD chip enter low power mode\n"); +} + +int tcpm_post_probe(struct udevice *dev) +{ + int ret = tcpm_port_init(dev); + + if (ret < 0) { + dev_err(dev, "failed to tcpm port init\n"); + return ret; + } + + tcpm_poll_event(dev); + + return 0; +} diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h index 5271e646bb16..270088ad94f7 100644 --- a/include/dm/uclass-id.h +++ b/include/dm/uclass-id.h @@ -139,6 +139,7 @@ enum uclass_id { UCLASS_SYSCON, /* System configuration device */ UCLASS_SYSINFO, /* Device information from hardware */ UCLASS_SYSRESET, /* System reset device */ + UCLASS_TCPM, /* TypeC port manager */ UCLASS_TEE, /* Trusted Execution Environment device */ UCLASS_THERMAL, /* Thermal sensor */ UCLASS_TIMER, /* Timer device */ diff --git a/include/usb/pd.h b/include/usb/pd.h new file mode 100644 index 000000000000..cacda322d7c6 --- /dev/null +++ b/include/usb/pd.h @@ -0,0 +1,516 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright 2015-2017 Google, Inc + */ + +#ifndef __LINUX_USB_PD_H +#define __LINUX_USB_PD_H + +#include <linux/kernel.h> +#include <linux/types.h> + +enum typec_port_type { + TYPEC_PORT_SRC, + TYPEC_PORT_SNK, + TYPEC_PORT_DRP, +}; + +enum typec_data_role { + TYPEC_DEVICE, + TYPEC_HOST, +}; + +enum typec_role { + TYPEC_SINK, + TYPEC_SOURCE, +}; + +/* USB PD Messages */ +enum pd_ctrl_msg_type { + /* 0 Reserved */ + PD_CTRL_GOOD_CRC = 1, + PD_CTRL_GOTO_MIN = 2, + PD_CTRL_ACCEPT = 3, + PD_CTRL_REJECT = 4, + PD_CTRL_PING = 5, + PD_CTRL_PS_RDY = 6, + PD_CTRL_GET_SOURCE_CAP = 7, + PD_CTRL_GET_SINK_CAP = 8, + PD_CTRL_DR_SWAP = 9, + PD_CTRL_PR_SWAP = 10, + PD_CTRL_VCONN_SWAP = 11, + PD_CTRL_WAIT = 12, + PD_CTRL_SOFT_RESET = 13, + /* 14-15 Reserved */ + PD_CTRL_NOT_SUPP = 16, + PD_CTRL_GET_SOURCE_CAP_EXT = 17, + PD_CTRL_GET_STATUS = 18, + PD_CTRL_FR_SWAP = 19, + PD_CTRL_GET_PPS_STATUS = 20, + PD_CTRL_GET_COUNTRY_CODES = 21, + /* 22-31 Reserved */ +}; + +enum pd_data_msg_type { + /* 0 Reserved */ + PD_DATA_SOURCE_CAP = 1, + PD_DATA_REQUEST = 2, + PD_DATA_BIST = 3, + PD_DATA_SINK_CAP = 4, + PD_DATA_BATT_STATUS = 5, + PD_DATA_ALERT = 6, + PD_DATA_GET_COUNTRY_INFO = 7, + PD_DATA_ENTER_USB = 8, + /* 9-14 Reserved */ + PD_DATA_VENDOR_DEF = 15, + /* 16-31 Reserved */ +}; + +enum pd_ext_msg_type { + /* 0 Reserved */ + PD_EXT_SOURCE_CAP_EXT = 1, + PD_EXT_STATUS = 2, + PD_EXT_GET_BATT_CAP = 3, + PD_EXT_GET_BATT_STATUS = 4, + PD_EXT_BATT_CAP = 5, + PD_EXT_GET_MANUFACTURER_INFO = 6, + PD_EXT_MANUFACTURER_INFO = 7, + PD_EXT_SECURITY_REQUEST = 8, + PD_EXT_SECURITY_RESPONSE = 9, + PD_EXT_FW_UPDATE_REQUEST = 10, + PD_EXT_FW_UPDATE_RESPONSE = 11, + PD_EXT_PPS_STATUS = 12, + PD_EXT_COUNTRY_INFO = 13, + PD_EXT_COUNTRY_CODES = 14, + /* 15-31 Reserved */ +}; + +#define PD_REV10 0x0 +#define PD_REV20 0x1 +#define PD_REV30 0x2 +#define PD_MAX_REV PD_REV30 + +#define PD_HEADER_EXT_HDR BIT(15) +#define PD_HEADER_CNT_SHIFT 12 +#define PD_HEADER_CNT_MASK 0x7 +#define PD_HEADER_ID_SHIFT 9 +#define PD_HEADER_ID_MASK 0x7 +#define PD_HEADER_PWR_ROLE BIT(8) +#define PD_HEADER_REV_SHIFT 6 +#define PD_HEADER_REV_MASK 0x3 +#define PD_HEADER_DATA_ROLE BIT(5) +#define PD_HEADER_TYPE_SHIFT 0 +#define PD_HEADER_TYPE_MASK 0x1f + +#define PD_HEADER(type, pwr, data, rev, id, cnt, ext_hdr) \ + ((((type) & PD_HEADER_TYPE_MASK) << PD_HEADER_TYPE_SHIFT) | \ + ((pwr) == TYPEC_SOURCE ? PD_HEADER_PWR_ROLE : 0) | \ + ((data) == TYPEC_HOST ? PD_HEADER_DATA_ROLE : 0) | \ + ((rev) << PD_HEADER_REV_SHIFT) | \ + (((id) & PD_HEADER_ID_MASK) << PD_HEADER_ID_SHIFT) | \ + (((cnt) & PD_HEADER_CNT_MASK) << PD_HEADER_CNT_SHIFT) | \ + ((ext_hdr) ? PD_HEADER_EXT_HDR : 0)) + +#define PD_HEADER_LE(type, pwr, data, rev, id, cnt) \ + cpu_to_le16(PD_HEADER((type), (pwr), (data), (rev), (id), (cnt), (0))) + +static inline unsigned int pd_header_cnt(u16 header) +{ + return (header >> PD_HEADER_CNT_SHIFT) & PD_HEADER_CNT_MASK; +} + +static inline unsigned int pd_header_cnt_le(__le16 header) +{ + return pd_header_cnt(le16_to_cpu(header)); +} + +static inline unsigned int pd_header_type(u16 header) +{ + return (header >> PD_HEADER_TYPE_SHIFT) & PD_HEADER_TYPE_MASK; +} + +static inline unsigned int pd_header_type_le(__le16 header) +{ + return pd_header_type(le16_to_cpu(header)); +} + +static inline unsigned int pd_header_msgid(u16 header) +{ + return (header >> PD_HEADER_ID_SHIFT) & PD_HEADER_ID_MASK; +} + +static inline unsigned int pd_header_msgid_le(__le16 header) +{ + return pd_header_msgid(le16_to_cpu(header)); +} + +static inline unsigned int pd_header_rev(u16 header) +{ + return (header >> PD_HEADER_REV_SHIFT) & PD_HEADER_REV_MASK; +} + +static inline unsigned int pd_header_rev_le(__le16 header) +{ + return pd_header_rev(le16_to_cpu(header)); +} + +#define PD_EXT_HDR_CHUNKED BIT(15) +#define PD_EXT_HDR_CHUNK_NUM_SHIFT 11 +#define PD_EXT_HDR_CHUNK_NUM_MASK 0xf +#define PD_EXT_HDR_REQ_CHUNK BIT(10) +#define PD_EXT_HDR_DATA_SIZE_SHIFT 0 +#define PD_EXT_HDR_DATA_SIZE_MASK 0x1ff + +#define PD_EXT_HDR(data_size, req_chunk, chunk_num, chunked) \ + ((((data_size) & PD_EXT_HDR_DATA_SIZE_MASK) << PD_EXT_HDR_DATA_SIZE_SHIFT) | \ + ((req_chunk) ? PD_EXT_HDR_REQ_CHUNK : 0) | \ + (((chunk_num) & PD_EXT_HDR_CHUNK_NUM_MASK) << PD_EXT_HDR_CHUNK_NUM_SHIFT) | \ + ((chunked) ? PD_EXT_HDR_CHUNKED : 0)) + +#define PD_EXT_HDR_LE(data_size, req_chunk, chunk_num, chunked) \ + cpu_to_le16(PD_EXT_HDR((data_size), (req_chunk), (chunk_num), (chunked))) + +static inline unsigned int pd_ext_header_chunk_num(u16 ext_header) +{ + return (ext_header >> PD_EXT_HDR_CHUNK_NUM_SHIFT) & + PD_EXT_HDR_CHUNK_NUM_MASK; +} + +static inline unsigned int pd_ext_header_data_size(u16 ext_header) +{ + return (ext_header >> PD_EXT_HDR_DATA_SIZE_SHIFT) & + PD_EXT_HDR_DATA_SIZE_MASK; +} + +static inline unsigned int pd_ext_header_data_size_le(__le16 ext_header) +{ + return pd_ext_header_data_size(le16_to_cpu(ext_header)); +} + +#define PD_MAX_PAYLOAD 7 +#define PD_EXT_MAX_CHUNK_DATA 26 + +/* + * struct pd_chunked_ext_message_data - PD chunked extended message data as + * seen on wire + * @header: PD extended message header + * @data: PD extended message data + */ +struct pd_chunked_ext_message_data { + __le16 header; + u8 data[PD_EXT_MAX_CHUNK_DATA]; +} __packed; + +/* + * struct pd_message - PD message as seen on wire + * @header: PD message header + * @payload: PD message payload + * @ext_msg: PD message chunked extended message data + */ +struct pd_message { + __le16 header; + union { + __le32 payload[PD_MAX_PAYLOAD]; + struct pd_chunked_ext_message_data ext_msg; + }; +} __packed; + +/* PDO: Power Data Object */ +#define PDO_MAX_OBJECTS 7 + +enum pd_pdo_type { + PDO_TYPE_FIXED = 0, + PDO_TYPE_BATT = 1, + PDO_TYPE_VAR = 2, + PDO_TYPE_APDO = 3, +}; + +#define PDO_TYPE_SHIFT 30 +#define PDO_TYPE_MASK 0x3 + +#define PDO_TYPE(t) ((t) << PDO_TYPE_SHIFT) + +#define PDO_VOLT_MASK 0x3ff +#define PDO_CURR_MASK 0x3ff +#define PDO_PWR_MASK 0x3ff + +#define PDO_FIXED_DUAL_ROLE BIT(29) /* Power role swap supported */ +#define PDO_FIXED_SUSPEND BIT(28) /* USB Suspend supported (Source) */ +#define PDO_FIXED_HIGHER_CAP BIT(28) /* Requires more than vSafe5V (Sink) */ +#define PDO_FIXED_EXTPOWER BIT(27) /* Externally powered */ +#define PDO_FIXED_USB_COMM BIT(26) /* USB communications capable */ +#define PDO_FIXED_DATA_SWAP BIT(25) /* Data role swap supported */ +#define PDO_FIXED_UNCHUNK_EXT BIT(24) /* Unchunked Extended Message supported (Source) */ +#define PDO_FIXED_FRS_CURR_MASK (BIT(24) | BIT(23)) /* FR_Swap Current (Sink) */ +#define PDO_FIXED_FRS_CURR_SHIFT 23 +#define PDO_FIXED_VOLT_SHIFT 10 /* 50mV units */ +#define PDO_FIXED_CURR_SHIFT 0 /* 10mA units */ + +#define PDO_FIXED_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_FIXED_VOLT_SHIFT) +#define PDO_FIXED_CURR(ma) ((((ma) / 10) & PDO_CURR_MASK) << PDO_FIXED_CURR_SHIFT) + +#define PDO_FIXED(mv, ma, flags) \ + (PDO_TYPE(PDO_TYPE_FIXED) | (flags) | \ + PDO_FIXED_VOLT(mv) | PDO_FIXED_CURR(ma)) + +#define VSAFE5V 5000 /* mv units */ + +#define PDO_BATT_MAX_VOLT_SHIFT 20 /* 50mV units */ +#define PDO_BATT_MIN_VOLT_SHIFT 10 /* 50mV units */ +#define PDO_BATT_MAX_PWR_SHIFT 0 /* 250mW units */ + +#define PDO_BATT_MIN_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_BATT_MIN_VOLT_SHIFT) +#define PDO_BATT_MAX_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_BATT_MAX_VOLT_SHIFT) +#define PDO_BATT_MAX_POWER(mw) ((((mw) / 250) & PDO_PWR_MASK) << PDO_BATT_MAX_PWR_SHIFT) + +#define PDO_BATT(min_mv, max_mv, max_mw) \ + (PDO_TYPE(PDO_TYPE_BATT) | PDO_BATT_MIN_VOLT(min_mv) | \ + PDO_BATT_MAX_VOLT(max_mv) | PDO_BATT_MAX_POWER(max_mw)) + +#define PDO_VAR_MAX_VOLT_SHIFT 20 /* 50mV units */ +#define PDO_VAR_MIN_VOLT_SHIFT 10 /* 50mV units */ +#define PDO_VAR_MAX_CURR_SHIFT 0 /* 10mA units */ + +#define PDO_VAR_MIN_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_VAR_MIN_VOLT_SHIFT) +#define PDO_VAR_MAX_VOLT(mv) ((((mv) / 50) & PDO_VOLT_MASK) << PDO_VAR_MAX_VOLT_SHIFT) +#define PDO_VAR_MAX_CURR(ma) ((((ma) / 10) & PDO_CURR_MASK) << PDO_VAR_MAX_CURR_SHIFT) + +#define PDO_VAR(min_mv, max_mv, max_ma) \ + (PDO_TYPE(PDO_TYPE_VAR) | PDO_VAR_MIN_VOLT(min_mv) | \ + PDO_VAR_MAX_VOLT(max_mv) | PDO_VAR_MAX_CURR(max_ma)) + +enum pd_apdo_type { + APDO_TYPE_PPS = 0, +}; + +#define PDO_APDO_TYPE_SHIFT 28 /* Only valid value currently is 0x0 - PPS */ +#define PDO_APDO_TYPE_MASK 0x3 + +#define PDO_APDO_TYPE(t) ((t) << PDO_APDO_TYPE_SHIFT) + +#define PDO_PPS_APDO_MAX_VOLT_SHIFT 17 /* 100mV units */ +#define PDO_PPS_APDO_MIN_VOLT_SHIFT 8 /* 100mV units */ +#define PDO_PPS_APDO_MAX_CURR_SHIFT 0 /* 50mA units */ + +#define PDO_PPS_APDO_VOLT_MASK 0xff +#define PDO_PPS_APDO_CURR_MASK 0x7f + +#define PDO_PPS_APDO_MIN_VOLT(mv) \ + ((((mv) / 100) & PDO_PPS_APDO_VOLT_MASK) << PDO_PPS_APDO_MIN_VOLT_SHIFT) +#define PDO_PPS_APDO_MAX_VOLT(mv) \ + ((((mv) / 100) & PDO_PPS_APDO_VOLT_MASK) << PDO_PPS_APDO_MAX_VOLT_SHIFT) +#define PDO_PPS_APDO_MAX_CURR(ma) \ + ((((ma) / 50) & PDO_PPS_APDO_CURR_MASK) << PDO_PPS_APDO_MAX_CURR_SHIFT) + +#define PDO_PPS_APDO(min_mv, max_mv, max_ma) \ + (PDO_TYPE(PDO_TYPE_APDO) | PDO_APDO_TYPE(APDO_TYPE_PPS) | \ + PDO_PPS_APDO_MIN_VOLT(min_mv) | PDO_PPS_APDO_MAX_VOLT(max_mv) | \ + PDO_PPS_APDO_MAX_CURR(max_ma)) + +static inline enum pd_pdo_type pdo_type(u32 pdo) +{ + return (pdo >> PDO_TYPE_SHIFT) & PDO_TYPE_MASK; +} + +static inline unsigned int pdo_fixed_voltage(u32 pdo) +{ + return ((pdo >> PDO_FIXED_VOLT_SHIFT) & PDO_VOLT_MASK) * 50; +} + +static inline unsigned int pdo_min_voltage(u32 pdo) +{ + return ((pdo >> PDO_VAR_MIN_VOLT_SHIFT) & PDO_VOLT_MASK) * 50; +} + +static inline unsigned int pdo_max_voltage(u32 pdo) +{ + return ((pdo >> PDO_VAR_MAX_VOLT_SHIFT) & PDO_VOLT_MASK) * 50; +} + +static inline unsigned int pdo_max_current(u32 pdo) +{ + return ((pdo >> PDO_VAR_MAX_CURR_SHIFT) & PDO_CURR_MASK) * 10; +} + +static inline unsigned int pdo_max_power(u32 pdo) +{ + return ((pdo >> PDO_BATT_MAX_PWR_SHIFT) & PDO_PWR_MASK) * 250; +} + +static inline enum pd_apdo_type pdo_apdo_type(u32 pdo) +{ + return (pdo >> PDO_APDO_TYPE_SHIFT) & PDO_APDO_TYPE_MASK; +} + +static inline unsigned int pdo_pps_apdo_min_voltage(u32 pdo) +{ + return ((pdo >> PDO_PPS_APDO_MIN_VOLT_SHIFT) & + PDO_PPS_APDO_VOLT_MASK) * 100; +} + +static inline unsigned int pdo_pps_apdo_max_voltage(u32 pdo) +{ + return ((pdo >> PDO_PPS_APDO_MAX_VOLT_SHIFT) & + PDO_PPS_APDO_VOLT_MASK) * 100; +} + +static inline unsigned int pdo_pps_apdo_max_current(u32 pdo) +{ + return ((pdo >> PDO_PPS_APDO_MAX_CURR_SHIFT) & + PDO_PPS_APDO_CURR_MASK) * 50; +} + +/* RDO: Request Data Object */ +#define RDO_OBJ_POS_SHIFT 28 +#define RDO_OBJ_POS_MASK 0x7 +#define RDO_GIVE_BACK BIT(27) /* Supports reduced operating current */ +#define RDO_CAP_MISMATCH BIT(26) /* Not satisfied by source caps */ +#define RDO_USB_COMM BIT(25) /* USB communications capable */ +#define RDO_NO_SUSPEND BIT(24) /* USB Suspend not supported */ + +#define RDO_PWR_MASK 0x3ff +#define RDO_CURR_MASK 0x3ff + +#define RDO_FIXED_OP_CURR_SHIFT 10 +#define RDO_FIXED_MAX_CURR_SHIFT 0 + +#define RDO_OBJ(idx) (((idx) & RDO_OBJ_POS_MASK) << RDO_OBJ_POS_SHIFT) + +#define PDO_FIXED_OP_CURR(ma) ((((ma) / 10) & RDO_CURR_MASK) << RDO_FIXED_OP_CURR_SHIFT) +#define PDO_FIXED_MAX_CURR(ma) ((((ma) / 10) & RDO_CURR_MASK) << RDO_FIXED_MAX_CURR_SHIFT) + +#define RDO_FIXED(idx, op_ma, max_ma, flags) \ + (RDO_OBJ(idx) | (flags) | \ + PDO_FIXED_OP_CURR(op_ma) | PDO_FIXED_MAX_CURR(max_ma)) + +#define RDO_BATT_OP_PWR_SHIFT 10 /* 250mW units */ +#define RDO_BATT_MAX_PWR_SHIFT 0 /* 250mW units */ + +#define RDO_BATT_OP_PWR(mw) ((((mw) / 250) & RDO_PWR_MASK) << RDO_BATT_OP_PWR_SHIFT) +#define RDO_BATT_MAX_PWR(mw) ((((mw) / 250) & RDO_PWR_MASK) << RDO_BATT_MAX_PWR_SHIFT) + +#define RDO_BATT(idx, op_mw, max_mw, flags) \ + (RDO_OBJ(idx) | (flags) | \ + RDO_BATT_OP_PWR(op_mw) | RDO_BATT_MAX_PWR(max_mw)) + +#define RDO_PROG_VOLT_MASK 0x7ff +#define RDO_PROG_CURR_MASK 0x7f + +#define RDO_PROG_VOLT_SHIFT 9 +#define RDO_PROG_CURR_SHIFT 0 + +#define RDO_PROG_VOLT_MV_STEP 20 +#define RDO_PROG_CURR_MA_STEP 50 + +#define PDO_PROG_OUT_VOLT(mv) \ + ((((mv) / RDO_PROG_VOLT_MV_STEP) & RDO_PROG_VOLT_MASK) << RDO_PROG_VOLT_SHIFT) +#define PDO_PROG_OP_CURR(ma) \ + ((((ma) / RDO_PROG_CURR_MA_STEP) & RDO_PROG_CURR_MASK) << RDO_PROG_CURR_SHIFT) + +#define RDO_PROG(idx, out_mv, op_ma, flags) \ + (RDO_OBJ(idx) | (flags) | \ + PDO_PROG_OUT_VOLT(out_mv) | PDO_PROG_OP_CURR(op_ma)) + +static inline unsigned int rdo_index(u32 rdo) +{ + return (rdo >> RDO_OBJ_POS_SHIFT) & RDO_OBJ_POS_MASK; +} + +static inline unsigned int rdo_op_current(u32 rdo) +{ + return ((rdo >> RDO_FIXED_OP_CURR_SHIFT) & RDO_CURR_MASK) * 10; +} + +static inline unsigned int rdo_max_current(u32 rdo) +{ + return ((rdo >> RDO_FIXED_MAX_CURR_SHIFT) & + RDO_CURR_MASK) * 10; +} + +static inline unsigned int rdo_op_power(u32 rdo) +{ + return ((rdo >> RDO_BATT_OP_PWR_SHIFT) & RDO_PWR_MASK) * 250; +} + +static inline unsigned int rdo_max_power(u32 rdo) +{ + return ((rdo >> RDO_BATT_MAX_PWR_SHIFT) & RDO_PWR_MASK) * 250; +} + +/* Enter_USB Data Object */ +#define EUDO_USB_MODE_MASK GENMASK(30, 28) +#define EUDO_USB_MODE_SHIFT 28 +#define EUDO_USB_MODE_USB2 0 +#define EUDO_USB_MODE_USB3 1 +#define EUDO_USB_MODE_USB4 2 +#define EUDO_USB4_DRD BIT(26) +#define EUDO_USB3_DRD BIT(25) +#define EUDO_CABLE_SPEED_MASK GENMASK(23, 21) +#define EUDO_CABLE_SPEED_SHIFT 21 +#define EUDO_CABLE_SPEED_USB2 0 +#define EUDO_CABLE_SPEED_USB3_GEN1 1 +#define EUDO_CABLE_SPEED_USB4_GEN2 2 +#define EUDO_CABLE_SPEED_USB4_GEN3 3 +#define EUDO_CABLE_TYPE_MASK GENMASK(20, 19) +#define EUDO_CABLE_TYPE_SHIFT 19 +#define EUDO_CABLE_TYPE_PASSIVE 0 +#define EUDO_CABLE_TYPE_RE_TIMER 1 +#define EUDO_CABLE_TYPE_RE_DRIVER 2 +#define EUDO_CABLE_TYPE_OPTICAL 3 +#define EUDO_CABLE_CURRENT_MASK GENMASK(18, 17) +#define EUDO_CABLE_CURRENT_SHIFT 17 +#define EUDO_CABLE_CURRENT_NOTSUPP 0 +#define EUDO_CABLE_CURRENT_3A 2 +#define EUDO_CABLE_CURRENT_5A 3 +#define EUDO_PCIE_SUPPORT BIT(16) +#define EUDO_DP_SUPPORT BIT(15) +#define EUDO_TBT_SUPPORT BIT(14) +#define EUDO_HOST_PRESENT BIT(13) + +/* USB PD timers and counters */ +#define PD_T_NO_RESPONSE 5000 /* 4.5 - 5.5 seconds */ +#define PD_T_DB_DETECT 10000 /* 10 - 15 seconds */ +#define PD_T_SEND_SOURCE_CAP 150 /* 100 - 200 ms */ +#define PD_T_SENDER_RESPONSE 60 /* 24 - 30 ms, relaxed */ +#define PD_T_RECEIVER_RESPONSE 15 /* 15ms max */ +#define PD_T_SOURCE_ACTIVITY 45 +#define PD_T_SINK_ACTIVITY 135 +#define PD_T_SINK_WAIT_CAP 310 /* 310 - 620 ms */ +#define PD_T_PS_TRANSITION 500 +#define PD_T_SRC_TRANSITION 35 +#define PD_T_DRP_SNK 40 +#define PD_T_DRP_SRC 30 +#define PD_T_PS_SOURCE_OFF 920 +#define PD_T_PS_SOURCE_ON 480 +#define PD_T_PS_SOURCE_ON_PRS 450 /* 390 - 480ms */ +#define PD_T_PS_HARD_RESET 30 +#define PD_T_SRC_RECOVER 760 +#define PD_T_SRC_RECOVER_MAX 1000 +#define PD_T_SRC_TURN_ON 275 +#define PD_T_SAFE_0V 650 +#define PD_T_VCONN_SOURCE_ON 100 +#define PD_T_SINK_REQUEST 100 /* 100 ms minimum */ +#define PD_T_ERROR_RECOVERY 100 /* minimum 25 is insufficient */ +#define PD_T_SRCSWAPSTDBY 625 /* Maximum of 650ms */ +#define PD_T_NEWSRC 250 /* Maximum of 275ms */ +#define PD_T_SWAP_SRC_START 20 /* Minimum of 20ms */ +#define PD_T_BIST_CONT_MODE 50 /* 30 - 60 ms */ +#define PD_T_SINK_TX 16 /* 16 - 20 ms */ +#define PD_T_CHUNK_NOT_SUPP 42 /* 40 - 50 ms */ + +#define PD_T_DRP_TRY 100 /* 75 - 150 ms */ +#define PD_T_DRP_TRYWAIT 600 /* 400 - 800 ms */ + +#define PD_T_CC_DEBOUNCE 200 /* 100 - 200 ms */ +#define PD_T_PD_DEBOUNCE 20 /* 10 - 20 ms */ +#define PD_T_TRY_CC_DEBOUNCE 15 /* 10 - 20 ms */ + +#define PD_N_CAPS_COUNT (PD_T_NO_RESPONSE / PD_T_SEND_SOURCE_CAP) +#define PD_N_HARD_RESET_COUNT 1 + +#define PD_P_SNK_STDBY_MW 2500 /* 2500 mW */ + +/* Time to wait for TCPC to complete transmit */ +#define PD_T_TCPC_TX_TIMEOUT 100 /* in ms */ + +#endif /* __LINUX_USB_PD_H */ diff --git a/include/usb/tcpm.h b/include/usb/tcpm.h new file mode 100644 index 000000000000..4574a5175ddb --- /dev/null +++ b/include/usb/tcpm.h @@ -0,0 +1,99 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright 2015-2017 Google, Inc + * Copyright 2024 Collabora + */ + +#ifndef __LINUX_USB_TCPM_H +#define __LINUX_USB_TCPM_H + +#include <dm/of.h> +#include <linux/bitops.h> +#include "pd.h" + +enum typec_orientation { + TYPEC_ORIENTATION_NONE, + TYPEC_ORIENTATION_NORMAL, + TYPEC_ORIENTATION_REVERSE, +}; + +enum typec_cc_status { + TYPEC_CC_OPEN, + TYPEC_CC_RA, + TYPEC_CC_RD, + TYPEC_CC_RP_DEF, + TYPEC_CC_RP_1_5, + TYPEC_CC_RP_3_0, +}; + +enum typec_cc_polarity { + TYPEC_POLARITY_CC1, + TYPEC_POLARITY_CC2, +}; + +enum tcpm_transmit_status { + TCPC_TX_SUCCESS = 0, + TCPC_TX_DISCARDED = 1, + TCPC_TX_FAILED = 2, +}; + +enum tcpm_transmit_type { + TCPC_TX_SOP = 0, + TCPC_TX_SOP_PRIME = 1, + TCPC_TX_SOP_PRIME_PRIME = 2, + TCPC_TX_SOP_DEBUG_PRIME = 3, + TCPC_TX_SOP_DEBUG_PRIME_PRIME = 4, + TCPC_TX_HARD_RESET = 5, + TCPC_TX_CABLE_RESET = 6, + TCPC_TX_BIST_MODE_2 = 7 +}; + +struct dm_tcpm_ops { + int (*get_connector_node)(struct udevice *dev, ofnode *connector_node); + int (*init)(struct udevice *dev); + int (*get_vbus)(struct udevice *dev); + int (*set_cc)(struct udevice *dev, enum typec_cc_status cc); + int (*get_cc)(struct udevice *dev, enum typec_cc_status *cc1, + enum typec_cc_status *cc2); + int (*set_polarity)(struct udevice *dev, + enum typec_cc_polarity polarity); + int (*set_vconn)(struct udevice *dev, bool on); + int (*set_vbus)(struct udevice *dev, bool on, bool charge); + int (*set_pd_rx)(struct udevice *dev, bool on); + int (*set_roles)(struct udevice *dev, bool attached, + enum typec_role role, enum typec_data_role data); + int (*start_toggling)(struct udevice *dev, + enum typec_port_type port_type, + enum typec_cc_status cc); + int (*pd_transmit)(struct udevice *dev, enum tcpm_transmit_type type, + const struct pd_message *msg, unsigned int negotiated_rev); + void (*poll_event)(struct udevice *dev); + int (*enter_low_power_mode)(struct udevice *dev, bool attached, bool pd_capable); +}; + +/* API for drivers */ +void tcpm_vbus_change(struct udevice *dev); +void tcpm_cc_change(struct udevice *dev); +void tcpm_pd_receive(struct udevice *dev, const struct pd_message *msg); +void tcpm_pd_transmit_complete(struct udevice *dev, + enum tcpm_transmit_status status); +void tcpm_pd_hard_reset(struct udevice *dev); + +/* API for boards */ +extern const char * const typec_pd_rev_name[]; +extern const char * const typec_orientation_name[]; +extern const char * const typec_role_name[]; +extern const char * const typec_data_role_name[]; +extern const char * const typec_cc_status_name[]; + +int tcpm_get(const char *name, struct udevice **devp); +int tcpm_get_pd_rev(struct udevice *dev); +int tcpm_get_current(struct udevice *dev); +int tcpm_get_voltage(struct udevice *dev); +enum typec_orientation tcpm_get_orientation(struct udevice *dev); +enum typec_role tcpm_get_pwr_role(struct udevice *dev); +enum typec_data_role tcpm_get_data_role(struct udevice *dev); +bool tcpm_is_connected(struct udevice *dev); +const char *tcpm_get_state(struct udevice *dev); + +#endif /* __LINUX_USB_TCPM_H */