new file mode 100644
@@ -0,0 +1,23 @@
+* Run Control and Power Management
+
+The RCPM performs all device-level tasks associated with device run control
+and power management.
+
+Required properites:
+ - reg : Offset and length of the register set of RCPM block.
+ - compatible : Specifies the compatibility list for the RCPM. The type
+ should be string, such as "fsl,qoriq-rcpm-1.0", "fsl,qoriq-rcpm-2.0".
+
+Example:
+The RCPM node for T4240:
+ rcpm: global-utilities@e2000 {
+ compatible = "fsl,t4240-rcpm", "fsl,qoriq-rcpm-2.0";
+ reg = <0xe2000 0x1000>;
+ };
+
+The RCPM node for P4080:
+ rcpm: global-utilities@e2000 {
+ compatible = "fsl,qoriq-rcpm-1.0";
+ reg = <0xe2000 0x1000>;
+ #sleep-cells = <1>;
+ };
@@ -188,5 +188,110 @@ static inline void guts_set_pmuxcr_dma(struct ccsr_guts __iomem *guts,
#endif
+struct ccsr_rcpm_v1 {
+ u8 res0000[4];
+ __be32 cdozsr; /* 0x0004 Core Doze Status Register */
+ u8 res0008[4];
+ __be32 cdozcr; /* 0x000c Core Doze Control Register */
+ u8 res0010[4];
+ __be32 cnapsr; /* 0x0014 Core Nap Status Register */
+ u8 res0018[4];
+ __be32 cnapcr; /* 0x001c Core Nap Control Register */
+ u8 res0020[4];
+ __be32 cdozpsr; /* 0x0024 Core Doze Previous Status Register */
+ u8 res0028[4];
+ __be32 cnappsr; /* 0x002c Core Nap Previous Status Register */
+ u8 res0030[4];
+ __be32 cwaitsr; /* 0x0034 Core Wait Status Register */
+ u8 res0038[4];
+ __be32 cwdtdsr; /* 0x003c Core Watchdog Detect Status Register */
+ __be32 powmgtcsr; /* 0x0040 Power Management Control&Status Register */
+#define RCPM_POWMGTCSR_SLP 0x00020000
+ u8 res0044[12];
+ __be32 ippdexpcr; /* 0x0050 IP Powerdown Exception Control Register */
+ u8 res0054[16];
+ __be32 cpmimr; /* 0x0064 Core PM IRQ Mask Register */
+ u8 res0068[4];
+ __be32 cpmcimr; /* 0x006c Core PM Critical IRQ Mask Register */
+ u8 res0070[4];
+ __be32 cpmmcmr; /* 0x0074 Core PM Machine Check Mask Register */
+ u8 res0078[4];
+ __be32 cpmnmimr; /* 0x007c Core PM NMI Mask Register */
+ u8 res0080[4];
+ __be32 ctbenr; /* 0x0084 Core Time Base Enable Register */
+ u8 res0088[4];
+ __be32 ctbckselr; /* 0x008c Core Time Base Clock Select Register */
+ u8 res0090[4];
+ __be32 ctbhltcr; /* 0x0094 Core Time Base Halt Control Register */
+ u8 res0098[4];
+ __be32 cmcpmaskcr; /* 0x00a4 Core Machine Check Mask Register */
+};
+
+struct ccsr_rcpm_v2 {
+ u8 res_00[12];
+ __be32 tph10sr0; /* Thread PH10 Status Register */
+ u8 res_10[12];
+ __be32 tph10setr0; /* Thread PH10 Set Control Register */
+ u8 res_20[12];
+ __be32 tph10clrr0; /* Thread PH10 Clear Control Register */
+ u8 res_30[12];
+ __be32 tph10psr0; /* Thread PH10 Previous Status Register */
+ u8 res_40[12];
+ __be32 twaitsr0; /* Thread Wait Status Register */
+ u8 res_50[96];
+ __be32 pcph15sr; /* Physical Core PH15 Status Register */
+ __be32 pcph15setr; /* Physical Core PH15 Set Control Register */
+ __be32 pcph15clrr; /* Physical Core PH15 Clear Control Register */
+ __be32 pcph15psr; /* Physical Core PH15 Prev Status Register */
+ u8 res_c0[16];
+ __be32 pcph20sr; /* Physical Core PH20 Status Register */
+ __be32 pcph20setr; /* Physical Core PH20 Set Control Register */
+ __be32 pcph20clrr; /* Physical Core PH20 Clear Control Register */
+ __be32 pcph20psr; /* Physical Core PH20 Prev Status Register */
+ __be32 pcpw20sr; /* Physical Core PW20 Status Register */
+ u8 res_e0[12];
+ __be32 pcph30sr; /* Physical Core PH30 Status Register */
+ __be32 pcph30setr; /* Physical Core PH30 Set Control Register */
+ __be32 pcph30clrr; /* Physical Core PH30 Clear Control Register */
+ __be32 pcph30psr; /* Physical Core PH30 Prev Status Register */
+ u8 res_100[32];
+ __be32 ippwrgatecr; /* IP Power Gating Control Register */
+ u8 res_124[12];
+ __be32 powmgtcsr; /* Power Management Control & Status Reg */
+#define RCPM_POWMGTCSR_LPM20_RQ 0x00100000
+#define RCPM_POWMGTCSR_LPM20_ST 0x00000200
+#define RCPM_POWMGTCSR_P_LPM20_ST 0x00000100
+ u8 res_134[12];
+ __be32 ippdexpcr[4]; /* IP Powerdown Exception Control Reg */
+ u8 res_150[12];
+ __be32 tpmimr0; /* Thread PM Interrupt Mask Reg */
+ u8 res_160[12];
+ __be32 tpmcimr0; /* Thread PM Crit Interrupt Mask Reg */
+ u8 res_170[12];
+ __be32 tpmmcmr0; /* Thread PM Machine Check Interrupt Mask Reg */
+ u8 res_180[12];
+ __be32 tpmnmimr0; /* Thread PM NMI Mask Reg */
+ u8 res_190[12];
+ __be32 tmcpmaskcr0; /* Thread Machine Check Mask Control Reg */
+ __be32 pctbenr; /* Physical Core Time Base Enable Reg */
+ __be32 pctbclkselr; /* Physical Core Time Base Clock Select */
+ __be32 tbclkdivr; /* Time Base Clock Divider Register */
+ u8 res_1ac[4];
+ __be32 ttbhltcr[4]; /* Thread Time Base Halt Control Register */
+ __be32 clpcl10sr; /* Cluster PCL10 Status Register */
+ __be32 clpcl10setr; /* Cluster PCL30 Set Control Register */
+ __be32 clpcl10clrr; /* Cluster PCL30 Clear Control Register */
+ __be32 clpcl10psr; /* Cluster PCL30 Prev Status Register */
+ __be32 cddslpsetr; /* Core Domain Deep Sleep Set Register */
+ __be32 cddslpclrr; /* Core Domain Deep Sleep Clear Register */
+ __be32 cdpwroksetr; /* Core Domain Power OK Set Register */
+ __be32 cdpwrokclrr; /* Core Domain Power OK Clear Register */
+ __be32 cdpwrensr; /* Core Domain Power Enable Status Register */
+ __be32 cddslsr; /* Core Domain Deep Sleep Status Register */
+ u8 res_1e8[8];
+ __be32 dslpcntcr[8]; /* Deep Sleep Counter Cfg Register */
+ u8 res_300[3568];
+};
+
#endif
#endif
new file mode 100644
@@ -0,0 +1,49 @@
+/*
+ * Support Power Management
+ *
+ * Copyright 2014-2015 Freescale Semiconductor Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+#ifndef __PPC_FSL_PM_H
+#define __PPC_FSL_PM_H
+#ifdef __KERNEL__
+
+#define E500_PM_PH10 1
+#define E500_PM_PH15 2
+#define E500_PM_PH20 3
+#define E500_PM_PH30 4
+#define E500_PM_DOZE E500_PM_PH10
+#define E500_PM_NAP E500_PM_PH15
+
+#define PLAT_PM_SLEEP 20
+#define PLAT_PM_LPM20 30
+
+#define FSL_PM_SLEEP (1 << 0)
+#define FSL_PM_DEEP_SLEEP (1 << 1)
+
+struct fsl_pm_ops {
+ /* mask pending interrupts to the RCPM from MPIC */
+ void (*irq_mask)(int cpu);
+ /* unmask pending interrupts to the RCPM from MPIC */
+ void (*irq_unmask)(int cpu);
+ /* place the CPU in the specified state */
+ void (*cpu_enter_state)(int cpu, int state);
+ /* exit the CPU from the specified state */
+ void (*cpu_exit_state)(int cpu, int state);
+ /* place the platform in the sleep state */
+ int (*plat_enter_sleep)(void);
+ /* freeze the time base */
+ void (*freeze_time_base)(int freeze);
+ /* keep the power of IP blocks during sleep/deep sleep */
+ void (*set_ip_power)(int enable, u32 *mask);
+ /* get platform supported power management modes */
+ unsigned int (*get_pm_modes)(void);
+};
+
+extern const struct fsl_pm_ops *qoriq_pm_ops;
+#endif /* __KERNEL__ */
+#endif /* __PPC_FSL_PM_H */
@@ -8,6 +8,7 @@ menuconfig FSL_SOC_BOOKE
select FSL_PCI if PCI
select SERIAL_8250_EXTENDED if SERIAL_8250
select SERIAL_8250_SHARE_IRQ if SERIAL_8250
+ select FSL_CORENET_RCPM if PPC_E500MC
default y
if FSL_SOC_BOOKE
@@ -40,3 +40,8 @@ config SCOM_DEBUGFS
config GE_FPGA
bool
default n
+
+config FSL_CORENET_RCPM
+ bool
+ help
+ This option enables support for RCPM (Run Control/Power Management).
@@ -20,6 +20,7 @@ obj-$(CONFIG_MMIO_NVRAM) += mmio_nvram.o
obj-$(CONFIG_FSL_SOC) += fsl_soc.o fsl_mpic_err.o
obj-$(CONFIG_FSL_PCI) += fsl_pci.o $(fsl-msi-obj-y)
obj-$(CONFIG_FSL_PMC) += fsl_pmc.o
+obj-$(CONFIG_FSL_CORENET_RCPM) += fsl_rcpm.o
obj-$(CONFIG_FSL_LBC) += fsl_lbc.o
obj-$(CONFIG_FSL_GTM) += fsl_gtm.o
obj-$(CONFIG_FSL_85XX_CACHE_SRAM) += fsl_85xx_l2ctlr.o fsl_85xx_cache_sram.o
new file mode 100644
@@ -0,0 +1,353 @@
+/*
+ * RCPM(Run Control/Power Management) support
+ *
+ * Copyright 2012-2015 Freescale Semiconductor Inc.
+ *
+ * Author: Chenhui Zhao <chenhui.zhao@freescale.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/of_address.h>
+#include <linux/export.h>
+
+#include <asm/io.h>
+#include <asm/fsl_guts.h>
+#include <asm/cputhreads.h>
+#include <asm/fsl_pm.h>
+
+#define RCPM_V1 1
+#define RCPM_V2 2
+
+const struct fsl_pm_ops *qoriq_pm_ops;
+
+static struct ccsr_rcpm_v1 __iomem *rcpm_v1_regs;
+static struct ccsr_rcpm_v2 __iomem *rcpm_v2_regs;
+static unsigned int fsl_supported_pm_modes;
+
+static void rcpm_v1_irq_mask(int cpu)
+{
+ int hw_cpu = get_hard_smp_processor_id(cpu);
+ unsigned int mask = 1 << hw_cpu;
+
+ setbits32(&rcpm_v1_regs->cpmimr, mask);
+ setbits32(&rcpm_v1_regs->cpmcimr, mask);
+ setbits32(&rcpm_v1_regs->cpmmcmr, mask);
+ setbits32(&rcpm_v1_regs->cpmnmimr, mask);
+}
+
+static void rcpm_v2_irq_mask(int cpu)
+{
+ int hw_cpu = get_hard_smp_processor_id(cpu);
+ unsigned int mask = 1 << hw_cpu;
+
+ setbits32(&rcpm_v2_regs->tpmimr0, mask);
+ setbits32(&rcpm_v2_regs->tpmcimr0, mask);
+ setbits32(&rcpm_v2_regs->tpmmcmr0, mask);
+ setbits32(&rcpm_v2_regs->tpmnmimr0, mask);
+}
+
+static void rcpm_v1_irq_unmask(int cpu)
+{
+ int hw_cpu = get_hard_smp_processor_id(cpu);
+ unsigned int mask = 1 << hw_cpu;
+
+ clrbits32(&rcpm_v1_regs->cpmimr, mask);
+ clrbits32(&rcpm_v1_regs->cpmcimr, mask);
+ clrbits32(&rcpm_v1_regs->cpmmcmr, mask);
+ clrbits32(&rcpm_v1_regs->cpmnmimr, mask);
+}
+
+static void rcpm_v2_irq_unmask(int cpu)
+{
+ int hw_cpu = get_hard_smp_processor_id(cpu);
+ unsigned int mask = 1 << hw_cpu;
+
+ clrbits32(&rcpm_v2_regs->tpmimr0, mask);
+ clrbits32(&rcpm_v2_regs->tpmcimr0, mask);
+ clrbits32(&rcpm_v2_regs->tpmmcmr0, mask);
+ clrbits32(&rcpm_v2_regs->tpmnmimr0, mask);
+}
+
+static void rcpm_v1_set_ip_power(int enable, u32 *mask)
+{
+ if (enable)
+ setbits32(&rcpm_v1_regs->ippdexpcr, *mask);
+ else
+ clrbits32(&rcpm_v1_regs->ippdexpcr, *mask);
+}
+
+static void rcpm_v2_set_ip_power(int enable, u32 *mask)
+{
+ if (enable)
+ setbits32(&rcpm_v2_regs->ippdexpcr[0], *mask);
+ else
+ clrbits32(&rcpm_v2_regs->ippdexpcr[0], *mask);
+}
+
+static void rcpm_v1_cpu_enter_state(int cpu, int state)
+{
+ int hw_cpu = get_hard_smp_processor_id(cpu);
+ unsigned int mask = 1 << hw_cpu;
+
+ switch (state) {
+ case E500_PM_PH10:
+ setbits32(&rcpm_v1_regs->cdozcr, mask);
+ break;
+ case E500_PM_PH15:
+ setbits32(&rcpm_v1_regs->cnapcr, mask);
+ break;
+ default:
+ pr_err("%s: Unknown cpu PM state (%d)\n", __func__, state);
+ break;
+ }
+}
+
+static void rcpm_v2_cpu_enter_state(int cpu, int state)
+{
+ int hw_cpu = get_hard_smp_processor_id(cpu);
+ u32 mask = 1 << cpu_core_index_of_thread(hw_cpu);
+
+ switch (state) {
+ case E500_PM_PH10:
+ /* one bit corresponds to one thread for PH10 of 6500 */
+ setbits32(&rcpm_v2_regs->tph10setr0, 1 << hw_cpu);
+ break;
+ case E500_PM_PH15:
+ setbits32(&rcpm_v2_regs->pcph15setr, mask);
+ break;
+ case E500_PM_PH20:
+ setbits32(&rcpm_v2_regs->pcph20setr, mask);
+ break;
+ case E500_PM_PH30:
+ setbits32(&rcpm_v2_regs->pcph30setr, mask);
+ break;
+ default:
+ pr_err("%s: Unknown cpu PM state (%d)\n", __func__, state);
+ }
+}
+
+static void rcpm_v1_cpu_exit_state(int cpu, int state)
+{
+ int hw_cpu = get_hard_smp_processor_id(cpu);
+ unsigned int mask = 1 << hw_cpu;
+
+ switch (state) {
+ case E500_PM_PH10:
+ clrbits32(&rcpm_v1_regs->cdozcr, mask);
+ break;
+ case E500_PM_PH15:
+ clrbits32(&rcpm_v1_regs->cnapcr, mask);
+ break;
+ default:
+ pr_err("%s: Unknown cpu PM state (%d)\n", __func__, state);
+ break;
+ }
+}
+
+static void rcpm_v2_cpu_exit_state(int cpu, int state)
+{
+ int hw_cpu = get_hard_smp_processor_id(cpu);
+ u32 mask = 1 << cpu_core_index_of_thread(hw_cpu);
+
+ switch (state) {
+ case E500_PM_PH10:
+ setbits32(&rcpm_v2_regs->tph10clrr0, 1 << hw_cpu);
+ break;
+ case E500_PM_PH15:
+ setbits32(&rcpm_v2_regs->pcph15clrr, mask);
+ break;
+ case E500_PM_PH20:
+ setbits32(&rcpm_v2_regs->pcph20clrr, mask);
+ break;
+ case E500_PM_PH30:
+ setbits32(&rcpm_v2_regs->pcph30clrr, mask);
+ break;
+ default:
+ pr_err("%s: Unknown cpu PM state (%d)\n", __func__, state);
+ }
+}
+
+static int rcpm_v1_plat_enter_state(int state)
+{
+ u32 *pmcsr_reg = &rcpm_v1_regs->powmgtcsr;
+ int ret = 0;
+ int result;
+
+ switch (state) {
+ case PLAT_PM_SLEEP:
+ setbits32(pmcsr_reg, RCPM_POWMGTCSR_SLP);
+
+ /* At this point, the device is in sleep mode. */
+
+ /* Upon resume, wait for RCPM_POWMGTCSR_SLP bit to be clear. */
+ result = spin_event_timeout(
+ !(in_be32(pmcsr_reg) & RCPM_POWMGTCSR_SLP), 10000, 10);
+ if (!result) {
+ pr_err("%s: timeout waiting for SLP bit to be cleared\n",
+ __func__);
+ ret = -ETIMEDOUT;
+ }
+ break;
+ default:
+ pr_err("%s: Unknown platform PM state (%d)\n",
+ __func__, state);
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int rcpm_v2_plat_enter_state(int state)
+{
+ u32 *pmcsr_reg = &rcpm_v2_regs->powmgtcsr;
+ int ret = 0;
+ int result;
+
+ switch (state) {
+ case PLAT_PM_LPM20:
+ /* clear previous LPM20 status */
+ setbits32(pmcsr_reg, RCPM_POWMGTCSR_P_LPM20_ST);
+ /* enter LPM20 status */
+ setbits32(pmcsr_reg, RCPM_POWMGTCSR_LPM20_RQ);
+
+ /* At this point, the device is in LPM20 status. */
+
+ /* resume ... */
+ result = spin_event_timeout(
+ !(in_be32(pmcsr_reg) & RCPM_POWMGTCSR_LPM20_ST), 10000, 10);
+ if (!result) {
+ pr_err("%s: timeout waiting for LPM20 bit to be cleared\n",
+ __func__);
+ ret = -ETIMEDOUT;
+ }
+ break;
+ default:
+ pr_err("%s: Unknown platform PM state (%d)\n",
+ __func__, state);
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int rcpm_v1_plat_enter_sleep(void)
+{
+ return rcpm_v1_plat_enter_state(PLAT_PM_SLEEP);
+}
+
+static int rcpm_v2_plat_enter_sleep(void)
+{
+ return rcpm_v2_plat_enter_state(PLAT_PM_LPM20);
+}
+
+static void rcpm_common_freeze_time_base(u32 *tben_reg, int freeze)
+{
+ static u32 mask;
+
+ if (freeze) {
+ mask = in_be32(tben_reg);
+ clrbits32(tben_reg, mask);
+ } else {
+ setbits32(tben_reg, mask);
+ }
+
+ /* read back to push the previous write */
+ in_be32(tben_reg);
+}
+
+static void rcpm_v1_freeze_time_base(int freeze)
+{
+ rcpm_common_freeze_time_base(&rcpm_v1_regs->ctbenr, freeze);
+}
+
+static void rcpm_v2_freeze_time_base(int freeze)
+{
+ rcpm_common_freeze_time_base(&rcpm_v2_regs->pctbenr, freeze);
+}
+
+static unsigned int rcpm_get_pm_modes(void)
+{
+ return fsl_supported_pm_modes;
+}
+
+static const struct fsl_pm_ops qoriq_rcpm_v1_ops = {
+ .irq_mask = rcpm_v1_irq_mask,
+ .irq_unmask = rcpm_v1_irq_unmask,
+ .cpu_enter_state = rcpm_v1_cpu_enter_state,
+ .cpu_exit_state = rcpm_v1_cpu_exit_state,
+ .plat_enter_sleep = rcpm_v1_plat_enter_sleep,
+ .set_ip_power = rcpm_v1_set_ip_power,
+ .freeze_time_base = rcpm_v1_freeze_time_base,
+ .get_pm_modes = rcpm_get_pm_modes,
+};
+
+static const struct fsl_pm_ops qoriq_rcpm_v2_ops = {
+ .irq_mask = rcpm_v2_irq_mask,
+ .irq_unmask = rcpm_v2_irq_unmask,
+ .cpu_enter_state = rcpm_v2_cpu_enter_state,
+ .cpu_exit_state = rcpm_v2_cpu_exit_state,
+ .plat_enter_sleep = rcpm_v2_plat_enter_sleep,
+ .set_ip_power = rcpm_v2_set_ip_power,
+ .freeze_time_base = rcpm_v2_freeze_time_base,
+ .get_pm_modes = rcpm_get_pm_modes,
+};
+
+static const struct of_device_id rcpm_matches[] = {
+ {
+ .compatible = "fsl,qoriq-rcpm-1.0",
+ .data = (void *)RCPM_V1,
+ },
+ {
+ .compatible = "fsl,qoriq-rcpm-2.0",
+ .data = (void *)RCPM_V2,
+ },
+ {},
+};
+
+int fsl_rcpm_init(void)
+{
+ struct device_node *np;
+ const struct of_device_id *match;
+ void __iomem *base;
+
+ np = of_find_matching_node_and_match(NULL, rcpm_matches, &match);
+ if (!np) {
+ pr_err("%s: can't find the rcpm node.\n", __func__);
+ return -ENODEV;
+ }
+
+ base = of_iomap(np, 0);
+ if (!base) {
+ pr_err("%s: of_iomap() error.\n", __func__);
+ return -ENOMEM;
+ }
+
+ /* support sleep by default */
+ fsl_supported_pm_modes = FSL_PM_SLEEP;
+ of_node_put(np);
+
+ switch ((unsigned long)match->data) {
+ case RCPM_V1:
+ rcpm_v1_regs = base;
+ qoriq_pm_ops = &qoriq_rcpm_v1_ops;
+ break;
+
+ case RCPM_V2:
+ rcpm_v2_regs = base;
+ qoriq_pm_ops = &qoriq_rcpm_v2_ops;
+ break;
+
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+/* need to call this before SMP init */
+early_initcall(fsl_rcpm_init);
There is a RCPM (Run Control/Power Management) in Freescale QorIQ series processors. The device performs tasks associated with device run control and power management. The driver implements some features: mask/unmask irq, enter/exit low power states, freeze time base, etc. Signed-off-by: Chenhui Zhao <chenhui.zhao@freescale.com> --- Documentation/devicetree/bindings/soc/fsl/rcpm.txt | 23 ++ arch/powerpc/include/asm/fsl_guts.h | 105 ++++++ arch/powerpc/include/asm/fsl_pm.h | 49 +++ arch/powerpc/platforms/85xx/Kconfig | 1 + arch/powerpc/sysdev/Kconfig | 5 + arch/powerpc/sysdev/Makefile | 1 + arch/powerpc/sysdev/fsl_rcpm.c | 353 +++++++++++++++++++++ 7 files changed, 537 insertions(+) create mode 100644 Documentation/devicetree/bindings/soc/fsl/rcpm.txt create mode 100644 arch/powerpc/include/asm/fsl_pm.h create mode 100644 arch/powerpc/sysdev/fsl_rcpm.c