diff options
Diffstat (limited to 'recipes/linux/linux-omap-2.6.26/omap3evm/0001-omap3-cpuidle.patch')
| -rw-r--r-- | recipes/linux/linux-omap-2.6.26/omap3evm/0001-omap3-cpuidle.patch | 450 |
1 files changed, 450 insertions, 0 deletions
diff --git a/recipes/linux/linux-omap-2.6.26/omap3evm/0001-omap3-cpuidle.patch b/recipes/linux/linux-omap-2.6.26/omap3evm/0001-omap3-cpuidle.patch new file mode 100644 index 0000000000..cdc9447b4c --- /dev/null +++ b/recipes/linux/linux-omap-2.6.26/omap3evm/0001-omap3-cpuidle.patch @@ -0,0 +1,450 @@ +From: "Rajendra Nayak" <rnayak@ti.com> +To: <linux-omap@vger.kernel.org> +Subject: [PATCH 01/02] OMAP3 CPUidle driver +Date: Tue, 10 Jun 2008 12:39:00 +0530 + +This patch adds the OMAP3 cpuidle driver. Irq enable/disable is done in the core cpuidle driver +before it queries the governor for the next state. + +Signed-off-by: Rajendra Nayak <rnayak@ti.com> + +--- + arch/arm/mach-omap2/Makefile | 2 + arch/arm/mach-omap2/cpuidle34xx.c | 293 ++++++++++++++++++++++++++++++++++++++ + arch/arm/mach-omap2/cpuidle34xx.h | 51 ++++++ + arch/arm/mach-omap2/pm34xx.c | 5 + drivers/cpuidle/cpuidle.c | 10 + + 5 files changed, 359 insertions(+), 2 deletions(-) + +Index: linux-omap-2.6/arch/arm/mach-omap2/Makefile +=================================================================== +--- linux-omap-2.6.orig/arch/arm/mach-omap2/Makefile 2008-06-09 20:15:33.855303920 +0530 ++++ linux-omap-2.6/arch/arm/mach-omap2/Makefile 2008-06-09 20:15:39.569121361 +0530 +@@ -20,7 +20,7 @@ obj-y += pm.o + obj-$(CONFIG_ARCH_OMAP2) += pm24xx.o + obj-$(CONFIG_ARCH_OMAP2420) += sleep242x.o + obj-$(CONFIG_ARCH_OMAP2430) += sleep243x.o +-obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o ++obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o cpuidle34xx.o + obj-$(CONFIG_PM_DEBUG) += pm-debug.o + endif + +Index: linux-omap-2.6/arch/arm/mach-omap2/cpuidle34xx.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-omap-2.6/arch/arm/mach-omap2/cpuidle34xx.c 2008-06-10 11:41:27.644820323 +0530 +@@ -0,0 +1,293 @@ ++/* ++ * linux/arch/arm/mach-omap2/cpuidle34xx.c ++ * ++ * OMAP3 CPU IDLE Routines ++ * ++ * Copyright (C) 2007-2008 Texas Instruments, Inc. ++ * Rajendra Nayak <rnayak@ti.com> ++ * ++ * Copyright (C) 2007 Texas Instruments, Inc. ++ * Karthik Dasu <karthik-dp@ti.com> ++ * ++ * Copyright (C) 2006 Nokia Corporation ++ * Tony Lindgren <tony@atomide.com> ++ * ++ * Copyright (C) 2005 Texas Instruments, Inc. ++ * Richard Woodruff <r-woodruff2@ti.com> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++ ++#include <linux/cpuidle.h> ++#include <asm/arch/pm.h> ++#include <asm/arch/prcm.h> ++#include <asm/arch/powerdomain.h> ++#include <asm/arch/clockdomain.h> ++#include <asm/arch/irqs.h> ++#include "cpuidle34xx.h" ++ ++#ifdef CONFIG_CPU_IDLE ++ ++struct omap3_processor_cx omap3_power_states[OMAP3_MAX_STATES]; ++struct omap3_processor_cx current_cx_state; ++ ++static int omap3_idle_bm_check(void) ++{ ++ /* Check for omap3_fclks_active() here once available */ ++ return 0; ++} ++ ++/* omap3_enter_idle - Programs OMAP3 to enter the specified state. ++ * returns the total time during which the system was idle. ++ */ ++static int omap3_enter_idle(struct cpuidle_device *dev, ++ struct cpuidle_state *state) ++{ ++ struct omap3_processor_cx *cx = cpuidle_get_statedata(state); ++ struct timespec ts_preidle, ts_postidle, ts_idle; ++ struct powerdomain *mpu_pd, *core_pd, *per_pd, *neon_pd; ++ int neon_pwrst; ++ ++ current_cx_state = *cx; ++ ++ if (cx->type == OMAP3_STATE_C0) { ++ /* Do nothing for C0, not even a wfi */ ++ return 0; ++ } ++ ++ /* Used to keep track of the total time in idle */ ++ getnstimeofday(&ts_preidle); ++ ++ mpu_pd = pwrdm_lookup("mpu_pwrdm"); ++ core_pd = pwrdm_lookup("core_pwrdm"); ++ per_pd = pwrdm_lookup("per_pwrdm"); ++ neon_pd = pwrdm_lookup("neon_pwrdm"); ++ ++ /* Reset previous power state registers */ ++ pwrdm_clear_all_prev_pwrst(mpu_pd); ++ pwrdm_clear_all_prev_pwrst(neon_pd); ++ pwrdm_clear_all_prev_pwrst(core_pd); ++ pwrdm_clear_all_prev_pwrst(per_pd); ++ ++ if (omap_irq_pending()) ++ return 0; ++ ++ neon_pwrst = pwrdm_read_pwrst(neon_pd); ++ ++ /* Program MPU/NEON to target state */ ++ if (cx->mpu_state < PWRDM_POWER_ON) { ++ if (neon_pwrst == PWRDM_POWER_ON) { ++ if (cx->mpu_state == PWRDM_POWER_RET) ++ pwrdm_set_next_pwrst(neon_pd, PWRDM_POWER_RET); ++ else if (cx->mpu_state == PWRDM_POWER_OFF) ++ pwrdm_set_next_pwrst(neon_pd, PWRDM_POWER_OFF); ++ } ++ pwrdm_set_next_pwrst(mpu_pd, cx->mpu_state); ++ } ++ ++ /* Program CORE to target state */ ++ if (cx->core_state < PWRDM_POWER_ON) ++ pwrdm_set_next_pwrst(core_pd, cx->core_state); ++ ++ /* Execute ARM wfi */ ++ omap_sram_idle(); ++ ++ /* Program MPU/NEON to ON */ ++ if (cx->mpu_state < PWRDM_POWER_ON) { ++ if (neon_pwrst == PWRDM_POWER_ON) ++ pwrdm_set_next_pwrst(neon_pd, PWRDM_POWER_ON); ++ pwrdm_set_next_pwrst(mpu_pd, PWRDM_POWER_ON); ++ } ++ ++ if (cx->core_state < PWRDM_POWER_ON) ++ pwrdm_set_next_pwrst(core_pd, PWRDM_POWER_ON); ++ ++ getnstimeofday(&ts_postidle); ++ ts_idle = timespec_sub(ts_postidle, ts_preidle); ++ return timespec_to_ns(&ts_idle); ++} ++ ++/* ++ * omap3_enter_idle_bm - enter function for states with CPUIDLE_FLAG_CHECK_BM ++ * ++ * This function checks for all the pre-requisites needed for OMAP3 to enter ++ * CORE RET/OFF state. It then calls omap3_enter_idle to program the desired ++ * C state. ++ */ ++static int omap3_enter_idle_bm(struct cpuidle_device *dev, ++ struct cpuidle_state *state) ++{ ++ struct cpuidle_state *new_state = NULL; ++ int i, j; ++ ++ if ((state->flags & CPUIDLE_FLAG_CHECK_BM) && omap3_idle_bm_check()) { ++ ++ /* Find current state in list */ ++ for (i = 0; i < OMAP3_MAX_STATES; i++) ++ if (state == &dev->states[i]) ++ break; ++ BUG_ON(i == OMAP3_MAX_STATES); ++ ++ /* Back up to non 'CHECK_BM' state */ ++ for (j = i - 1; j > 0; j--) { ++ struct cpuidle_state *s = &dev->states[j]; ++ ++ if (!(s->flags & CPUIDLE_FLAG_CHECK_BM)) { ++ new_state = s; ++ break; ++ } ++ } ++ ++ pr_debug("%s: Bus activity: Entering %s (instead of %s)\n", ++ __FUNCTION__, new_state->name, state->name); ++ } ++ ++ return omap3_enter_idle(dev, new_state ? : state); ++} ++ ++DEFINE_PER_CPU(struct cpuidle_device, omap3_idle_dev); ++ ++/* omap3_init_power_states - Initialises the OMAP3 specific C states. ++ * Below is the desciption of each C state. ++ * ++ C0 . System executing code ++ C1 . MPU WFI + Core active ++ C2 . MPU CSWR + Core active ++ C3 . MPU OFF + Core active ++ C4 . MPU CSWR + Core CSWR ++ C5 . MPU OFF + Core CSWR ++ C6 . MPU OFF + Core OFF ++ */ ++void omap_init_power_states(void) ++{ ++ /* C0 . System executing code */ ++ omap3_power_states[0].valid = 1; ++ omap3_power_states[0].type = OMAP3_STATE_C0; ++ omap3_power_states[0].sleep_latency = 0; ++ omap3_power_states[0].wakeup_latency = 0; ++ omap3_power_states[0].threshold = 0; ++ omap3_power_states[0].mpu_state = PWRDM_POWER_ON; ++ omap3_power_states[0].core_state = PWRDM_POWER_ON; ++ omap3_power_states[0].flags = CPUIDLE_FLAG_TIME_VALID | ++ CPUIDLE_FLAG_SHALLOW; ++ ++ /* C1 . MPU WFI + Core active */ ++ omap3_power_states[1].valid = 1; ++ omap3_power_states[1].type = OMAP3_STATE_C1; ++ omap3_power_states[1].sleep_latency = 10; ++ omap3_power_states[1].wakeup_latency = 10; ++ omap3_power_states[1].threshold = 30; ++ omap3_power_states[1].mpu_state = PWRDM_POWER_ON; ++ omap3_power_states[1].core_state = PWRDM_POWER_ON; ++ omap3_power_states[1].flags = CPUIDLE_FLAG_TIME_VALID | ++ CPUIDLE_FLAG_SHALLOW; ++ ++ /* C2 . MPU CSWR + Core active */ ++ omap3_power_states[2].valid = 1; ++ omap3_power_states[2].type = OMAP3_STATE_C2; ++ omap3_power_states[2].sleep_latency = 50; ++ omap3_power_states[2].wakeup_latency = 50; ++ omap3_power_states[2].threshold = 300; ++ omap3_power_states[2].mpu_state = PWRDM_POWER_RET; ++ omap3_power_states[2].core_state = PWRDM_POWER_ON; ++ omap3_power_states[2].flags = CPUIDLE_FLAG_TIME_VALID | ++ CPUIDLE_FLAG_BALANCED; ++ ++ /* C3 . MPU OFF + Core active */ ++ omap3_power_states[3].valid = 0; ++ omap3_power_states[3].type = OMAP3_STATE_C3; ++ omap3_power_states[3].sleep_latency = 1500; ++ omap3_power_states[3].wakeup_latency = 1800; ++ omap3_power_states[3].threshold = 4000; ++ omap3_power_states[3].mpu_state = PWRDM_POWER_OFF; ++ omap3_power_states[3].core_state = PWRDM_POWER_RET; ++ omap3_power_states[3].flags = CPUIDLE_FLAG_TIME_VALID | ++ CPUIDLE_FLAG_BALANCED; ++ ++ /* C4 . MPU CSWR + Core CSWR*/ ++ omap3_power_states[4].valid = 1; ++ omap3_power_states[4].type = OMAP3_STATE_C4; ++ omap3_power_states[4].sleep_latency = 2500; ++ omap3_power_states[4].wakeup_latency = 7500; ++ omap3_power_states[4].threshold = 12000; ++ omap3_power_states[4].mpu_state = PWRDM_POWER_RET; ++ omap3_power_states[4].core_state = PWRDM_POWER_RET; ++ omap3_power_states[4].flags = CPUIDLE_FLAG_TIME_VALID | ++ CPUIDLE_FLAG_BALANCED | CPUIDLE_FLAG_CHECK_BM; ++ ++ /* C5 . MPU OFF + Core CSWR */ ++ omap3_power_states[5].valid = 0; ++ omap3_power_states[5].type = OMAP3_STATE_C5; ++ omap3_power_states[5].sleep_latency = 3000; ++ omap3_power_states[5].wakeup_latency = 8500; ++ omap3_power_states[5].threshold = 15000; ++ omap3_power_states[5].mpu_state = PWRDM_POWER_OFF; ++ omap3_power_states[5].core_state = PWRDM_POWER_RET; ++ omap3_power_states[5].flags = CPUIDLE_FLAG_TIME_VALID | ++ CPUIDLE_FLAG_BALANCED | CPUIDLE_FLAG_CHECK_BM; ++ ++ /* C6 . MPU OFF + Core OFF */ ++ omap3_power_states[6].valid = 0; ++ omap3_power_states[6].type = OMAP3_STATE_C6; ++ omap3_power_states[6].sleep_latency = 10000; ++ omap3_power_states[6].wakeup_latency = 30000; ++ omap3_power_states[6].threshold = 300000; ++ omap3_power_states[6].mpu_state = PWRDM_POWER_OFF; ++ omap3_power_states[6].core_state = PWRDM_POWER_OFF; ++ omap3_power_states[6].flags = CPUIDLE_FLAG_TIME_VALID | ++ CPUIDLE_FLAG_DEEP | CPUIDLE_FLAG_CHECK_BM; ++} ++ ++struct cpuidle_driver omap3_idle_driver = { ++ .name = "omap3_idle", ++ .owner = THIS_MODULE, ++}; ++/* ++ * omap3_idle_init - Init routine for OMAP3 idle. ++ * Registers the OMAP3 specific cpuidle driver with the cpuidle f/w ++ * with the valid set of states. ++ */ ++int omap3_idle_init(void) ++{ ++ int i, count = 0; ++ struct omap3_processor_cx *cx; ++ struct cpuidle_state *state; ++ struct cpuidle_device *dev; ++ ++ omap_init_power_states(); ++ cpuidle_register_driver(&omap3_idle_driver); ++ ++ dev = &per_cpu(omap3_idle_dev, smp_processor_id()); ++ ++ for (i = 0; i < OMAP3_MAX_STATES; i++) { ++ cx = &omap3_power_states[i]; ++ state = &dev->states[count]; ++ ++ if (!cx->valid) ++ continue; ++ cpuidle_set_statedata(state, cx); ++ state->exit_latency = cx->sleep_latency + cx->wakeup_latency; ++ state->target_residency = cx->threshold; ++ state->flags = cx->flags; ++ state->enter = (state->flags & CPUIDLE_FLAG_CHECK_BM) ? ++ omap3_enter_idle_bm : omap3_enter_idle; ++ sprintf(state->name, "C%d", count+1); ++ count++; ++ } ++ ++ if (!count) ++ return -EINVAL; ++ dev->state_count = count; ++ ++ if (cpuidle_register_device(dev)) { ++ printk(KERN_ERR "%s: CPUidle register device failed\n", ++ __FUNCTION__); ++ return -EIO; ++ } ++ ++ return 0; ++} ++__initcall(omap3_idle_init); ++#endif /* CONFIG_CPU_IDLE */ +Index: linux-omap-2.6/arch/arm/mach-omap2/cpuidle34xx.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-omap-2.6/arch/arm/mach-omap2/cpuidle34xx.h 2008-06-09 20:15:39.569121361 +0530 +@@ -0,0 +1,51 @@ ++/* ++ * linux/arch/arm/mach-omap2/cpuidle34xx.h ++ * ++ * OMAP3 cpuidle structure definitions ++ * ++ * Copyright (C) 2007-2008 Texas Instruments, Inc. ++ * Written by Rajendra Nayak <rnayak@ti.com> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ * ++ * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR ++ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED ++ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. ++ * ++ * History: ++ * ++ */ ++ ++#ifndef ARCH_ARM_MACH_OMAP2_CPUIDLE_34XX ++#define ARCH_ARM_MACH_OMAP2_CPUIDLE_34XX ++ ++#define OMAP3_MAX_STATES 7 ++#define OMAP3_STATE_C0 0 /* C0 - System executing code */ ++#define OMAP3_STATE_C1 1 /* C1 - MPU WFI + Core active */ ++#define OMAP3_STATE_C2 2 /* C2 - MPU CSWR + Core active */ ++#define OMAP3_STATE_C3 3 /* C3 - MPU OFF + Core active */ ++#define OMAP3_STATE_C4 4 /* C4 - MPU RET + Core RET */ ++#define OMAP3_STATE_C5 5 /* C5 - MPU OFF + Core RET */ ++#define OMAP3_STATE_C6 6 /* C6 - MPU OFF + Core OFF */ ++ ++extern void omap_sram_idle(void); ++extern int omap3_irq_pending(void); ++ ++struct omap3_processor_cx { ++ u8 valid; ++ u8 type; ++ u32 sleep_latency; ++ u32 wakeup_latency; ++ u32 mpu_state; ++ u32 core_state; ++ u32 threshold; ++ u32 flags; ++}; ++ ++void omap_init_power_states(void); ++int omap3_idle_init(void); ++ ++#endif /* ARCH_ARM_MACH_OMAP2_CPUIDLE_34XX */ ++ +Index: linux-omap-2.6/arch/arm/mach-omap2/pm34xx.c +=================================================================== +--- linux-omap-2.6.orig/arch/arm/mach-omap2/pm34xx.c 2008-06-09 20:15:33.855303920 +0530 ++++ linux-omap-2.6/arch/arm/mach-omap2/pm34xx.c 2008-06-09 20:16:20.976798343 +0530 +@@ -141,7 +141,7 @@ static irqreturn_t prcm_interrupt_handle + return IRQ_HANDLED; + } + +-static void omap_sram_idle(void) ++void omap_sram_idle(void) + { + /* Variable to tell what needs to be saved and restored + * in omap_sram_idle*/ +@@ -156,6 +156,7 @@ static void omap_sram_idle(void) + + mpu_next_state = pwrdm_read_next_pwrst(mpu_pwrdm); + switch (mpu_next_state) { ++ case PWRDM_POWER_ON: + case PWRDM_POWER_RET: + /* No need to save context */ + save_state = 0; +@@ -386,7 +387,9 @@ int __init omap3_pm_init(void) + + prcm_setup_regs(); + ++#ifndef CONFIG_CPU_IDLE + pm_idle = omap3_pm_idle; ++#endif + + err1: + return ret; +Index: linux-omap-2.6/drivers/cpuidle/cpuidle.c +=================================================================== +--- linux-omap-2.6.orig/drivers/cpuidle/cpuidle.c 2008-06-09 20:15:33.856303888 +0530 ++++ linux-omap-2.6/drivers/cpuidle/cpuidle.c 2008-06-09 20:15:39.570121329 +0530 +@@ -58,6 +58,11 @@ static void cpuidle_idle_call(void) + return; + } + ++#ifdef CONFIG_ARCH_OMAP3 ++ local_irq_disable(); ++ local_fiq_disable(); ++#endif ++ + /* ask the governor for the next state */ + next_state = cpuidle_curr_governor->select(dev); + if (need_resched()) +@@ -70,6 +75,11 @@ static void cpuidle_idle_call(void) + target_state->time += (unsigned long long)dev->last_residency; + target_state->usage++; + ++#ifdef CONFIG_ARCH_OMAP3 ++ local_irq_enable(); ++ local_fiq_enable(); ++#endif ++ + /* give the governor an opportunity to reflect on the outcome */ + if (cpuidle_curr_governor->reflect) + cpuidle_curr_governor->reflect(dev); + +-- +To unsubscribe from this list: send the line "unsubscribe linux-omap" in +the body of a message to majordomo@vger.kernel.org +More majordomo info at http://vger.kernel.org/majordomo-info.html + |