| Message ID | 20200402084513.22682-1-rayagonda.kokatanur@broadcom.com |
|---|---|
| State | Superseded |
| Delegated to: | Tom Rini |
| Headers | show |
| Series | [v2,1/1] phy: add support for stingray PAXB PHY controller | expand |
On 02.04.20 10:45, Rayagonda Kokatanur wrote: > From: Srinath Mannam <srinath.mannam@broadcom.com> > > Add support for stingray PAXB PHY controller driver. > This driver supports maximum 8 PAXB phys using pipemux data. > > Signed-off-by: Srinath Mannam <srinath.mannam@broadcom.com> > Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com> > --- > Changes from v1: > -Address review comments from Stefan Roese, > Use GENMASK() instead of hard code value. > Remove unwanted struct declaration. > Get pr_err() into single line. > > drivers/phy/Kconfig | 7 ++ > drivers/phy/Makefile | 1 + > drivers/phy/phy-bcm-sr-pcie.c | 178 ++++++++++++++++++++++++++++++++++ > 3 files changed, 186 insertions(+) > create mode 100644 drivers/phy/phy-bcm-sr-pcie.c > > diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig > index a72f34f0d4..f7003807fc 100644 > --- a/drivers/phy/Kconfig > +++ b/drivers/phy/Kconfig > @@ -84,6 +84,13 @@ config BCM6368_USBH_PHY > help > Support for the Broadcom MIPS BCM6368 USBH PHY. > > +config BCM_SR_PCIE_PHY > + bool "Broadcom Stingray PCIe PHY driver" > + depends on PHY > + help > + Enable this to support the Broadcom Stingray PCIe PHY > + If unsure, say N. > + > config PHY_DA8XX_USB > tristate "TI DA8xx USB PHY Driver" > depends on PHY && ARCH_DAVINCI > diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile > index 43ce62e08c..3958f7899c 100644 > --- a/drivers/phy/Makefile > +++ b/drivers/phy/Makefile > @@ -9,6 +9,7 @@ obj-$(CONFIG_BCM6318_USBH_PHY) += bcm6318-usbh-phy.o > obj-$(CONFIG_BCM6348_USBH_PHY) += bcm6348-usbh-phy.o > obj-$(CONFIG_BCM6358_USBH_PHY) += bcm6358-usbh-phy.o > obj-$(CONFIG_BCM6368_USBH_PHY) += bcm6368-usbh-phy.o > +obj-$(CONFIG_BCM_SR_PCIE_PHY) += phy-bcm-sr-pcie.o > obj-$(CONFIG_PHY_SANDBOX) += sandbox-phy.o > obj-$(CONFIG_$(SPL_)PIPE3_PHY) += ti-pipe3-phy.o > obj-$(CONFIG_AM654_PHY) += phy-ti-am654.o > diff --git a/drivers/phy/phy-bcm-sr-pcie.c b/drivers/phy/phy-bcm-sr-pcie.c > new file mode 100644 > index 0000000000..080cac30b2 > --- /dev/null > +++ b/drivers/phy/phy-bcm-sr-pcie.c > @@ -0,0 +1,178 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Copyright (C) 2019 Broadcom > + */ > + > +#include <asm/io.h> > +#include <common.h> > +#include <dm.h> > +#include <dm/device.h> > +#include <linux/bitops.h> > +#include <generic-phy.h> Sorry for spotting this so late (and my nitpicking comments), but I think these include files could be reordered and dm/device.h removed: #include <common.h> #include <dm.h> #include <generic-phy.h> #include <asm/io.h> #include <linux/bitops.h> Other that that, feel free to add my: Reviewed-by: Stefan Roese <sr@denx.de> Thanks, Stefan > + > +/* we have up to 8 PAXB based RC. The 9th one is always PAXC */ > +#define SR_NR_PCIE_PHYS 8 > + > +#define PCIE_PIPEMUX_CFG_OFFSET 0x10c > +#define PCIE_PIPEMUX_SELECT_STRAP GENMASK(3, 0) > + > +#define CDRU_STRAP_DATA_LSW_OFFSET 0x5c > +#define PCIE_PIPEMUX_SHIFT 19 > +#define PCIE_PIPEMUX_MASK GENMASK(3, 0) > + > +/** > + * struct sr_pcie_phy_core - Stingray PCIe PHY core control > + * > + * @dev: pointer to device > + * @base: base register of PCIe SS > + * @cdru: CDRU base address > + * @pipemux: pipemuex strap > + */ > +struct sr_pcie_phy_core { > + struct udevice *dev; > + void __iomem *base; > + void __iomem *cdru; > + u32 pipemux; > +}; > + > +/* > + * PCIe PIPEMUX lookup table > + * > + * Each array index represents a PIPEMUX strap setting > + * The array element represents a bitmap where a set bit means the PCIe > + * core and associated serdes has been enabled as RC and is available for use > + */ > +static const u8 pipemux_table[] = { > + /* PIPEMUX = 0, EP 1x16 */ > + 0x00, > + /* PIPEMUX = 1, EP 1x8 + RC 1x8, core 7 */ > + 0x80, > + /* PIPEMUX = 2, EP 4x4 */ > + 0x00, > + /* PIPEMUX = 3, RC 2x8, cores 0, 7 */ > + 0x81, > + /* PIPEMUX = 4, RC 4x4, cores 0, 1, 6, 7 */ > + 0xc3, > + /* PIPEMUX = 5, RC 8x2, all 8 cores */ > + 0xff, > + /* PIPEMUX = 6, RC 3x4 + 2x2, cores 0, 2, 3, 6, 7 */ > + 0xcd, > + /* PIPEMUX = 7, RC 1x4 + 6x2, cores 0, 2, 3, 4, 5, 6, 7 */ > + 0xfd, > + /* PIPEMUX = 8, EP 1x8 + RC 4x2, cores 4, 5, 6, 7 */ > + 0xf0, > + /* PIPEMUX = 9, EP 1x8 + RC 2x4, cores 6, 7 */ > + 0xc0, > + /* PIPEMUX = 10, EP 2x4 + RC 2x4, cores 1, 6 */ > + 0x42, > + /* PIPEMUX = 11, EP 2x4 + RC 4x2, cores 2, 3, 4, 5 */ > + 0x3c, > + /* PIPEMUX = 12, EP 1x4 + RC 6x2, cores 2, 3, 4, 5, 6, 7 */ > + 0xfc, > + /* PIPEMUX = 13, RC 2x4 + RC 1x4 + 2x2, cores 2, 3, 6 */ > + 0x4c, > +}; > + > +/* > + * Return true if the strap setting is valid > + */ > +static bool pipemux_strap_is_valid(u32 pipemux) > +{ > + return !!(pipemux < ARRAY_SIZE(pipemux_table)); > +} > + > +/* > + * Read the PCIe PIPEMUX from strap > + */ > +static u32 pipemux_strap_read(struct sr_pcie_phy_core *core) > +{ > + u32 pipemux; > + > + /* > + * Read PIPEMUX configuration register to determine the pipemux setting > + * > + * In the case when the value indicates using HW strap, fall back to > + * use HW strap > + */ > + pipemux = readl(core->base + PCIE_PIPEMUX_CFG_OFFSET); > + pipemux &= PCIE_PIPEMUX_MASK; > + if (pipemux == PCIE_PIPEMUX_SELECT_STRAP) { > + pipemux = readl(core->cdru + CDRU_STRAP_DATA_LSW_OFFSET); > + pipemux >>= PCIE_PIPEMUX_SHIFT; > + pipemux &= PCIE_PIPEMUX_MASK; > + } > + > + return pipemux; > +} > + > +static int sr_pcie_phy_init(struct phy *phy) > +{ > + struct sr_pcie_phy_core *core = dev_get_priv(phy->dev); > + unsigned int core_idx = phy->id; > + > + debug("%s %lx\n", __func__, phy->id); > + /* > + * Check whether this PHY is for root complex or not. If yes, return > + * zero so the host driver can proceed to enumeration. If not, return > + * an error and that will force the host driver to bail out > + */ > + if (!!((pipemux_table[core->pipemux] >> core_idx) & 0x1)) > + return 0; > + > + return -ENODEV; > +} > + > +static int sr_pcie_phy_xlate(struct phy *phy, struct ofnode_phandle_args *args) > +{ > + debug("%s %d\n", __func__, args->args[0]); > + if (args->args_count && args->args[0] < SR_NR_PCIE_PHYS) > + phy->id = args->args[0]; > + else > + return -ENODEV; > + > + return 0; > +} > + > +static const struct phy_ops sr_pcie_phy_ops = { > + .of_xlate = sr_pcie_phy_xlate, > + .init = sr_pcie_phy_init, > +}; > + > +static int sr_pcie_phy_probe(struct udevice *dev) > +{ > + struct sr_pcie_phy_core *core = dev_get_priv(dev); > + > + core->dev = dev; > + > + core->base = (void __iomem *)devfdt_get_addr_name(dev, "reg_base"); > + core->cdru = (void __iomem *)devfdt_get_addr_name(dev, "cdru_base"); > + debug("ip base %p\n", core->base); > + debug("cdru base %p\n", core->cdru); > + > + /* read the PCIe PIPEMUX strap setting */ > + core->pipemux = pipemux_strap_read(core); > + if (!pipemux_strap_is_valid(core->pipemux)) { > + pr_err("invalid PCIe PIPEMUX strap %u\n", core->pipemux); > + return -EIO; > + } > + debug("%s %#x\n", __func__, core->pipemux); > + > + pr_info("Stingray PCIe PHY driver initialized\n"); > + > + return 0; > +} > + > +static const struct udevice_id sr_pcie_phy_match_table[] = { > + { .compatible = "brcm,sr-pcie-phy" }, > + { } > +}; > + > +U_BOOT_DRIVER(sr_pcie_phy) = { > + .name = "sr-pcie-phy", > + .id = UCLASS_PHY, > + .probe = sr_pcie_phy_probe, > + .of_match = sr_pcie_phy_match_table, > + .ops = &sr_pcie_phy_ops, > + .platdata_auto_alloc_size = sizeof(struct sr_pcie_phy_core), > + .priv_auto_alloc_size = sizeof(struct sr_pcie_phy_core), > +}; > Viele Grüße, Stefan
On Thu, Apr 2, 2020 at 3:29 PM Stefan Roese <sr@denx.de> wrote: > > On 02.04.20 10:45, Rayagonda Kokatanur wrote: > > From: Srinath Mannam <srinath.mannam@broadcom.com> > > > > Add support for stingray PAXB PHY controller driver. > > This driver supports maximum 8 PAXB phys using pipemux data. > > > > Signed-off-by: Srinath Mannam <srinath.mannam@broadcom.com> > > Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com> > > --- > > Changes from v1: > > -Address review comments from Stefan Roese, > > Use GENMASK() instead of hard code value. > > Remove unwanted struct declaration. > > Get pr_err() into single line. > > > > drivers/phy/Kconfig | 7 ++ > > drivers/phy/Makefile | 1 + > > drivers/phy/phy-bcm-sr-pcie.c | 178 ++++++++++++++++++++++++++++++++++ > > 3 files changed, 186 insertions(+) > > create mode 100644 drivers/phy/phy-bcm-sr-pcie.c > > > > diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig > > index a72f34f0d4..f7003807fc 100644 > > --- a/drivers/phy/Kconfig > > +++ b/drivers/phy/Kconfig > > @@ -84,6 +84,13 @@ config BCM6368_USBH_PHY > > help > > Support for the Broadcom MIPS BCM6368 USBH PHY. > > > > +config BCM_SR_PCIE_PHY > > + bool "Broadcom Stingray PCIe PHY driver" > > + depends on PHY > > + help > > + Enable this to support the Broadcom Stingray PCIe PHY > > + If unsure, say N. > > + > > config PHY_DA8XX_USB > > tristate "TI DA8xx USB PHY Driver" > > depends on PHY && ARCH_DAVINCI > > diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile > > index 43ce62e08c..3958f7899c 100644 > > --- a/drivers/phy/Makefile > > +++ b/drivers/phy/Makefile > > @@ -9,6 +9,7 @@ obj-$(CONFIG_BCM6318_USBH_PHY) += bcm6318-usbh-phy.o > > obj-$(CONFIG_BCM6348_USBH_PHY) += bcm6348-usbh-phy.o > > obj-$(CONFIG_BCM6358_USBH_PHY) += bcm6358-usbh-phy.o > > obj-$(CONFIG_BCM6368_USBH_PHY) += bcm6368-usbh-phy.o > > +obj-$(CONFIG_BCM_SR_PCIE_PHY) += phy-bcm-sr-pcie.o > > obj-$(CONFIG_PHY_SANDBOX) += sandbox-phy.o > > obj-$(CONFIG_$(SPL_)PIPE3_PHY) += ti-pipe3-phy.o > > obj-$(CONFIG_AM654_PHY) += phy-ti-am654.o > > diff --git a/drivers/phy/phy-bcm-sr-pcie.c b/drivers/phy/phy-bcm-sr-pcie.c > > new file mode 100644 > > index 0000000000..080cac30b2 > > --- /dev/null > > +++ b/drivers/phy/phy-bcm-sr-pcie.c > > @@ -0,0 +1,178 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * Copyright (C) 2019 Broadcom > > + */ > > + > > +#include <asm/io.h> > > +#include <common.h> > > +#include <dm.h> > > +#include <dm/device.h> > > +#include <linux/bitops.h> > > +#include <generic-phy.h> > > Sorry for spotting this so late (and my nitpicking comments), but I > think these include files could be reordered and dm/device.h removed: > > #include <common.h> > #include <dm.h> > #include <generic-phy.h> > #include <asm/io.h> > #include <linux/bitops.h> > > Other that that, feel free to add my: > > Reviewed-by: Stefan Roese <sr@denx.de> Not an issue Stefan. Thank you for your detailed review. I will do the above changes and push patch v3. > > Thanks, > Stefan > > > + > > +/* we have up to 8 PAXB based RC. The 9th one is always PAXC */ > > +#define SR_NR_PCIE_PHYS 8 > > + > > +#define PCIE_PIPEMUX_CFG_OFFSET 0x10c > > +#define PCIE_PIPEMUX_SELECT_STRAP GENMASK(3, 0) > > + > > +#define CDRU_STRAP_DATA_LSW_OFFSET 0x5c > > +#define PCIE_PIPEMUX_SHIFT 19 > > +#define PCIE_PIPEMUX_MASK GENMASK(3, 0) > > + > > +/** > > + * struct sr_pcie_phy_core - Stingray PCIe PHY core control > > + * > > + * @dev: pointer to device > > + * @base: base register of PCIe SS > > + * @cdru: CDRU base address > > + * @pipemux: pipemuex strap > > + */ > > +struct sr_pcie_phy_core { > > + struct udevice *dev; > > + void __iomem *base; > > + void __iomem *cdru; > > + u32 pipemux; > > +}; > > + > > +/* > > + * PCIe PIPEMUX lookup table > > + * > > + * Each array index represents a PIPEMUX strap setting > > + * The array element represents a bitmap where a set bit means the PCIe > > + * core and associated serdes has been enabled as RC and is available for use > > + */ > > +static const u8 pipemux_table[] = { > > + /* PIPEMUX = 0, EP 1x16 */ > > + 0x00, > > + /* PIPEMUX = 1, EP 1x8 + RC 1x8, core 7 */ > > + 0x80, > > + /* PIPEMUX = 2, EP 4x4 */ > > + 0x00, > > + /* PIPEMUX = 3, RC 2x8, cores 0, 7 */ > > + 0x81, > > + /* PIPEMUX = 4, RC 4x4, cores 0, 1, 6, 7 */ > > + 0xc3, > > + /* PIPEMUX = 5, RC 8x2, all 8 cores */ > > + 0xff, > > + /* PIPEMUX = 6, RC 3x4 + 2x2, cores 0, 2, 3, 6, 7 */ > > + 0xcd, > > + /* PIPEMUX = 7, RC 1x4 + 6x2, cores 0, 2, 3, 4, 5, 6, 7 */ > > + 0xfd, > > + /* PIPEMUX = 8, EP 1x8 + RC 4x2, cores 4, 5, 6, 7 */ > > + 0xf0, > > + /* PIPEMUX = 9, EP 1x8 + RC 2x4, cores 6, 7 */ > > + 0xc0, > > + /* PIPEMUX = 10, EP 2x4 + RC 2x4, cores 1, 6 */ > > + 0x42, > > + /* PIPEMUX = 11, EP 2x4 + RC 4x2, cores 2, 3, 4, 5 */ > > + 0x3c, > > + /* PIPEMUX = 12, EP 1x4 + RC 6x2, cores 2, 3, 4, 5, 6, 7 */ > > + 0xfc, > > + /* PIPEMUX = 13, RC 2x4 + RC 1x4 + 2x2, cores 2, 3, 6 */ > > + 0x4c, > > +}; > > + > > +/* > > + * Return true if the strap setting is valid > > + */ > > +static bool pipemux_strap_is_valid(u32 pipemux) > > +{ > > + return !!(pipemux < ARRAY_SIZE(pipemux_table)); > > +} > > + > > +/* > > + * Read the PCIe PIPEMUX from strap > > + */ > > +static u32 pipemux_strap_read(struct sr_pcie_phy_core *core) > > +{ > > + u32 pipemux; > > + > > + /* > > + * Read PIPEMUX configuration register to determine the pipemux setting > > + * > > + * In the case when the value indicates using HW strap, fall back to > > + * use HW strap > > + */ > > + pipemux = readl(core->base + PCIE_PIPEMUX_CFG_OFFSET); > > + pipemux &= PCIE_PIPEMUX_MASK; > > + if (pipemux == PCIE_PIPEMUX_SELECT_STRAP) { > > + pipemux = readl(core->cdru + CDRU_STRAP_DATA_LSW_OFFSET); > > + pipemux >>= PCIE_PIPEMUX_SHIFT; > > + pipemux &= PCIE_PIPEMUX_MASK; > > + } > > + > > + return pipemux; > > +} > > + > > +static int sr_pcie_phy_init(struct phy *phy) > > +{ > > + struct sr_pcie_phy_core *core = dev_get_priv(phy->dev); > > + unsigned int core_idx = phy->id; > > + > > + debug("%s %lx\n", __func__, phy->id); > > + /* > > + * Check whether this PHY is for root complex or not. If yes, return > > + * zero so the host driver can proceed to enumeration. If not, return > > + * an error and that will force the host driver to bail out > > + */ > > + if (!!((pipemux_table[core->pipemux] >> core_idx) & 0x1)) > > + return 0; > > + > > + return -ENODEV; > > +} > > + > > +static int sr_pcie_phy_xlate(struct phy *phy, struct ofnode_phandle_args *args) > > +{ > > + debug("%s %d\n", __func__, args->args[0]); > > + if (args->args_count && args->args[0] < SR_NR_PCIE_PHYS) > > + phy->id = args->args[0]; > > + else > > + return -ENODEV; > > + > > + return 0; > > +} > > + > > +static const struct phy_ops sr_pcie_phy_ops = { > > + .of_xlate = sr_pcie_phy_xlate, > > + .init = sr_pcie_phy_init, > > +}; > > + > > +static int sr_pcie_phy_probe(struct udevice *dev) > > +{ > > + struct sr_pcie_phy_core *core = dev_get_priv(dev); > > + > > + core->dev = dev; > > + > > + core->base = (void __iomem *)devfdt_get_addr_name(dev, "reg_base"); > > + core->cdru = (void __iomem *)devfdt_get_addr_name(dev, "cdru_base"); > > + debug("ip base %p\n", core->base); > > + debug("cdru base %p\n", core->cdru); > > + > > + /* read the PCIe PIPEMUX strap setting */ > > + core->pipemux = pipemux_strap_read(core); > > + if (!pipemux_strap_is_valid(core->pipemux)) { > > + pr_err("invalid PCIe PIPEMUX strap %u\n", core->pipemux); > > + return -EIO; > > + } > > + debug("%s %#x\n", __func__, core->pipemux); > > + > > + pr_info("Stingray PCIe PHY driver initialized\n"); > > + > > + return 0; > > +} > > + > > +static const struct udevice_id sr_pcie_phy_match_table[] = { > > + { .compatible = "brcm,sr-pcie-phy" }, > > + { } > > +}; > > + > > +U_BOOT_DRIVER(sr_pcie_phy) = { > > + .name = "sr-pcie-phy", > > + .id = UCLASS_PHY, > > + .probe = sr_pcie_phy_probe, > > + .of_match = sr_pcie_phy_match_table, > > + .ops = &sr_pcie_phy_ops, > > + .platdata_auto_alloc_size = sizeof(struct sr_pcie_phy_core), > > + .priv_auto_alloc_size = sizeof(struct sr_pcie_phy_core), > > +}; > > > > > Viele Grüße, > Stefan > > -- > DENX Software Engineering GmbH, Managing Director: Wolfgang Denk > HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany > Phone: (+49)-8142-66989-51 Fax: (+49)-8142-66989-80 Email: sr@denx.de
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index a72f34f0d4..f7003807fc 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -84,6 +84,13 @@ config BCM6368_USBH_PHY help Support for the Broadcom MIPS BCM6368 USBH PHY. +config BCM_SR_PCIE_PHY + bool "Broadcom Stingray PCIe PHY driver" + depends on PHY + help + Enable this to support the Broadcom Stingray PCIe PHY + If unsure, say N. + config PHY_DA8XX_USB tristate "TI DA8xx USB PHY Driver" depends on PHY && ARCH_DAVINCI diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 43ce62e08c..3958f7899c 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -9,6 +9,7 @@ obj-$(CONFIG_BCM6318_USBH_PHY) += bcm6318-usbh-phy.o obj-$(CONFIG_BCM6348_USBH_PHY) += bcm6348-usbh-phy.o obj-$(CONFIG_BCM6358_USBH_PHY) += bcm6358-usbh-phy.o obj-$(CONFIG_BCM6368_USBH_PHY) += bcm6368-usbh-phy.o +obj-$(CONFIG_BCM_SR_PCIE_PHY) += phy-bcm-sr-pcie.o obj-$(CONFIG_PHY_SANDBOX) += sandbox-phy.o obj-$(CONFIG_$(SPL_)PIPE3_PHY) += ti-pipe3-phy.o obj-$(CONFIG_AM654_PHY) += phy-ti-am654.o diff --git a/drivers/phy/phy-bcm-sr-pcie.c b/drivers/phy/phy-bcm-sr-pcie.c new file mode 100644 index 0000000000..080cac30b2 --- /dev/null +++ b/drivers/phy/phy-bcm-sr-pcie.c @@ -0,0 +1,178 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 Broadcom + */ + +#include <asm/io.h> +#include <common.h> +#include <dm.h> +#include <dm/device.h> +#include <linux/bitops.h> +#include <generic-phy.h> + +/* we have up to 8 PAXB based RC. The 9th one is always PAXC */ +#define SR_NR_PCIE_PHYS 8 + +#define PCIE_PIPEMUX_CFG_OFFSET 0x10c +#define PCIE_PIPEMUX_SELECT_STRAP GENMASK(3, 0) + +#define CDRU_STRAP_DATA_LSW_OFFSET 0x5c +#define PCIE_PIPEMUX_SHIFT 19 +#define PCIE_PIPEMUX_MASK GENMASK(3, 0) + +/** + * struct sr_pcie_phy_core - Stingray PCIe PHY core control + * + * @dev: pointer to device + * @base: base register of PCIe SS + * @cdru: CDRU base address + * @pipemux: pipemuex strap + */ +struct sr_pcie_phy_core { + struct udevice *dev; + void __iomem *base; + void __iomem *cdru; + u32 pipemux; +}; + +/* + * PCIe PIPEMUX lookup table + * + * Each array index represents a PIPEMUX strap setting + * The array element represents a bitmap where a set bit means the PCIe + * core and associated serdes has been enabled as RC and is available for use + */ +static const u8 pipemux_table[] = { + /* PIPEMUX = 0, EP 1x16 */ + 0x00, + /* PIPEMUX = 1, EP 1x8 + RC 1x8, core 7 */ + 0x80, + /* PIPEMUX = 2, EP 4x4 */ + 0x00, + /* PIPEMUX = 3, RC 2x8, cores 0, 7 */ + 0x81, + /* PIPEMUX = 4, RC 4x4, cores 0, 1, 6, 7 */ + 0xc3, + /* PIPEMUX = 5, RC 8x2, all 8 cores */ + 0xff, + /* PIPEMUX = 6, RC 3x4 + 2x2, cores 0, 2, 3, 6, 7 */ + 0xcd, + /* PIPEMUX = 7, RC 1x4 + 6x2, cores 0, 2, 3, 4, 5, 6, 7 */ + 0xfd, + /* PIPEMUX = 8, EP 1x8 + RC 4x2, cores 4, 5, 6, 7 */ + 0xf0, + /* PIPEMUX = 9, EP 1x8 + RC 2x4, cores 6, 7 */ + 0xc0, + /* PIPEMUX = 10, EP 2x4 + RC 2x4, cores 1, 6 */ + 0x42, + /* PIPEMUX = 11, EP 2x4 + RC 4x2, cores 2, 3, 4, 5 */ + 0x3c, + /* PIPEMUX = 12, EP 1x4 + RC 6x2, cores 2, 3, 4, 5, 6, 7 */ + 0xfc, + /* PIPEMUX = 13, RC 2x4 + RC 1x4 + 2x2, cores 2, 3, 6 */ + 0x4c, +}; + +/* + * Return true if the strap setting is valid + */ +static bool pipemux_strap_is_valid(u32 pipemux) +{ + return !!(pipemux < ARRAY_SIZE(pipemux_table)); +} + +/* + * Read the PCIe PIPEMUX from strap + */ +static u32 pipemux_strap_read(struct sr_pcie_phy_core *core) +{ + u32 pipemux; + + /* + * Read PIPEMUX configuration register to determine the pipemux setting + * + * In the case when the value indicates using HW strap, fall back to + * use HW strap + */ + pipemux = readl(core->base + PCIE_PIPEMUX_CFG_OFFSET); + pipemux &= PCIE_PIPEMUX_MASK; + if (pipemux == PCIE_PIPEMUX_SELECT_STRAP) { + pipemux = readl(core->cdru + CDRU_STRAP_DATA_LSW_OFFSET); + pipemux >>= PCIE_PIPEMUX_SHIFT; + pipemux &= PCIE_PIPEMUX_MASK; + } + + return pipemux; +} + +static int sr_pcie_phy_init(struct phy *phy) +{ + struct sr_pcie_phy_core *core = dev_get_priv(phy->dev); + unsigned int core_idx = phy->id; + + debug("%s %lx\n", __func__, phy->id); + /* + * Check whether this PHY is for root complex or not. If yes, return + * zero so the host driver can proceed to enumeration. If not, return + * an error and that will force the host driver to bail out + */ + if (!!((pipemux_table[core->pipemux] >> core_idx) & 0x1)) + return 0; + + return -ENODEV; +} + +static int sr_pcie_phy_xlate(struct phy *phy, struct ofnode_phandle_args *args) +{ + debug("%s %d\n", __func__, args->args[0]); + if (args->args_count && args->args[0] < SR_NR_PCIE_PHYS) + phy->id = args->args[0]; + else + return -ENODEV; + + return 0; +} + +static const struct phy_ops sr_pcie_phy_ops = { + .of_xlate = sr_pcie_phy_xlate, + .init = sr_pcie_phy_init, +}; + +static int sr_pcie_phy_probe(struct udevice *dev) +{ + struct sr_pcie_phy_core *core = dev_get_priv(dev); + + core->dev = dev; + + core->base = (void __iomem *)devfdt_get_addr_name(dev, "reg_base"); + core->cdru = (void __iomem *)devfdt_get_addr_name(dev, "cdru_base"); + debug("ip base %p\n", core->base); + debug("cdru base %p\n", core->cdru); + + /* read the PCIe PIPEMUX strap setting */ + core->pipemux = pipemux_strap_read(core); + if (!pipemux_strap_is_valid(core->pipemux)) { + pr_err("invalid PCIe PIPEMUX strap %u\n", core->pipemux); + return -EIO; + } + debug("%s %#x\n", __func__, core->pipemux); + + pr_info("Stingray PCIe PHY driver initialized\n"); + + return 0; +} + +static const struct udevice_id sr_pcie_phy_match_table[] = { + { .compatible = "brcm,sr-pcie-phy" }, + { } +}; + +U_BOOT_DRIVER(sr_pcie_phy) = { + .name = "sr-pcie-phy", + .id = UCLASS_PHY, + .probe = sr_pcie_phy_probe, + .of_match = sr_pcie_phy_match_table, + .ops = &sr_pcie_phy_ops, + .platdata_auto_alloc_size = sizeof(struct sr_pcie_phy_core), + .priv_auto_alloc_size = sizeof(struct sr_pcie_phy_core), +};