diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/mach-omap2/cpuidle34xx.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/arm/mach-omap2/cpuidle34xx.c | 445 |
1 files changed, 0 insertions, 445 deletions
diff --git a/ANDROID_3.4.5/arch/arm/mach-omap2/cpuidle34xx.c b/ANDROID_3.4.5/arch/arm/mach-omap2/cpuidle34xx.c deleted file mode 100644 index 53586648..00000000 --- a/ANDROID_3.4.5/arch/arm/mach-omap2/cpuidle34xx.c +++ /dev/null @@ -1,445 +0,0 @@ -/* - * linux/arch/arm/mach-omap2/cpuidle34xx.c - * - * OMAP3 CPU IDLE Routines - * - * Copyright (C) 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> - * - * Based on pm.c for omap2 - * - * 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/sched.h> -#include <linux/cpuidle.h> -#include <linux/export.h> -#include <linux/cpu_pm.h> - -#include <plat/prcm.h> -#include <plat/irqs.h> -#include "powerdomain.h" -#include "clockdomain.h" - -#include "pm.h" -#include "control.h" -#include "common.h" - -#ifdef CONFIG_CPU_IDLE - -/* - * The latencies/thresholds for various C states have - * to be configured from the respective board files. - * These are some default values (which might not provide - * the best power savings) used on boards which do not - * pass these details from the board file. - */ -static struct cpuidle_params cpuidle_params_table[] = { - /* C1 */ - {2 + 2, 5, 1}, - /* C2 */ - {10 + 10, 30, 1}, - /* C3 */ - {50 + 50, 300, 1}, - /* C4 */ - {1500 + 1800, 4000, 1}, - /* C5 */ - {2500 + 7500, 12000, 1}, - /* C6 */ - {3000 + 8500, 15000, 1}, - /* C7 */ - {10000 + 30000, 300000, 1}, -}; -#define OMAP3_NUM_STATES ARRAY_SIZE(cpuidle_params_table) - -/* Mach specific information to be recorded in the C-state driver_data */ -struct omap3_idle_statedata { - u32 mpu_state; - u32 core_state; - u8 valid; -}; -struct omap3_idle_statedata omap3_idle_data[OMAP3_NUM_STATES]; - -struct powerdomain *mpu_pd, *core_pd, *per_pd, *cam_pd; - -static int _cpuidle_allow_idle(struct powerdomain *pwrdm, - struct clockdomain *clkdm) -{ - clkdm_allow_idle(clkdm); - return 0; -} - -static int _cpuidle_deny_idle(struct powerdomain *pwrdm, - struct clockdomain *clkdm) -{ - clkdm_deny_idle(clkdm); - return 0; -} - -static int __omap3_enter_idle(struct cpuidle_device *dev, - struct cpuidle_driver *drv, - int index) -{ - struct omap3_idle_statedata *cx = - cpuidle_get_statedata(&dev->states_usage[index]); - u32 mpu_state = cx->mpu_state, core_state = cx->core_state; - - local_fiq_disable(); - - pwrdm_set_next_pwrst(mpu_pd, mpu_state); - pwrdm_set_next_pwrst(core_pd, core_state); - - if (omap_irq_pending() || need_resched()) - goto return_sleep_time; - - /* Deny idle for C1 */ - if (index == 0) { - pwrdm_for_each_clkdm(mpu_pd, _cpuidle_deny_idle); - pwrdm_for_each_clkdm(core_pd, _cpuidle_deny_idle); - } - - /* - * Call idle CPU PM enter notifier chain so that - * VFP context is saved. - */ - if (mpu_state == PWRDM_POWER_OFF) - cpu_pm_enter(); - - /* Execute ARM wfi */ - omap_sram_idle(); - - /* - * Call idle CPU PM enter notifier chain to restore - * VFP context. - */ - if (pwrdm_read_prev_pwrst(mpu_pd) == PWRDM_POWER_OFF) - cpu_pm_exit(); - - /* Re-allow idle for C1 */ - if (index == 0) { - pwrdm_for_each_clkdm(mpu_pd, _cpuidle_allow_idle); - pwrdm_for_each_clkdm(core_pd, _cpuidle_allow_idle); - } - -return_sleep_time: - - local_fiq_enable(); - - return index; -} - -/** - * omap3_enter_idle - Programs OMAP3 to enter the specified state - * @dev: cpuidle device - * @drv: cpuidle driver - * @index: the index of state to be entered - * - * Called from the CPUidle framework to program the device to the - * specified target state selected by the governor. - */ -static inline int omap3_enter_idle(struct cpuidle_device *dev, - struct cpuidle_driver *drv, - int index) -{ - return cpuidle_wrap_enter(dev, drv, index, __omap3_enter_idle); -} - -/** - * next_valid_state - Find next valid C-state - * @dev: cpuidle device - * @drv: cpuidle driver - * @index: Index of currently selected c-state - * - * If the state corresponding to index is valid, index is returned back - * to the caller. Else, this function searches for a lower c-state which is - * still valid (as defined in omap3_power_states[]) and returns its index. - * - * A state is valid if the 'valid' field is enabled and - * if it satisfies the enable_off_mode condition. - */ -static int next_valid_state(struct cpuidle_device *dev, - struct cpuidle_driver *drv, - int index) -{ - struct cpuidle_state_usage *curr_usage = &dev->states_usage[index]; - struct cpuidle_state *curr = &drv->states[index]; - struct omap3_idle_statedata *cx = cpuidle_get_statedata(curr_usage); - u32 mpu_deepest_state = PWRDM_POWER_RET; - u32 core_deepest_state = PWRDM_POWER_RET; - int next_index = -1; - - if (enable_off_mode) { - mpu_deepest_state = PWRDM_POWER_OFF; - /* - * Erratum i583: valable for ES rev < Es1.2 on 3630. - * CORE OFF mode is not supported in a stable form, restrict - * instead the CORE state to RET. - */ - if (!IS_PM34XX_ERRATUM(PM_SDRC_WAKEUP_ERRATUM_i583)) - core_deepest_state = PWRDM_POWER_OFF; - } - - /* Check if current state is valid */ - if ((cx->valid) && - (cx->mpu_state >= mpu_deepest_state) && - (cx->core_state >= core_deepest_state)) { - return index; - } else { - int idx = OMAP3_NUM_STATES - 1; - - /* Reach the current state starting at highest C-state */ - for (; idx >= 0; idx--) { - if (&drv->states[idx] == curr) { - next_index = idx; - break; - } - } - - /* Should never hit this condition */ - WARN_ON(next_index == -1); - - /* - * Drop to next valid state. - * Start search from the next (lower) state. - */ - idx--; - for (; idx >= 0; idx--) { - cx = cpuidle_get_statedata(&dev->states_usage[idx]); - if ((cx->valid) && - (cx->mpu_state >= mpu_deepest_state) && - (cx->core_state >= core_deepest_state)) { - next_index = idx; - break; - } - } - /* - * C1 is always valid. - * So, no need to check for 'next_index == -1' outside - * this loop. - */ - } - - return next_index; -} - -/** - * omap3_enter_idle_bm - Checks for any bus activity - * @dev: cpuidle device - * @drv: cpuidle driver - * @index: array index of target state to be programmed - * - * This function checks for any pending activity and then programs - * the device to the specified or a safer state. - */ -static int omap3_enter_idle_bm(struct cpuidle_device *dev, - struct cpuidle_driver *drv, - int index) -{ - int new_state_idx; - u32 core_next_state, per_next_state = 0, per_saved_state = 0, cam_state; - struct omap3_idle_statedata *cx; - int ret; - - /* - * Prevent idle completely if CAM is active. - * CAM does not have wakeup capability in OMAP3. - */ - cam_state = pwrdm_read_pwrst(cam_pd); - if (cam_state == PWRDM_POWER_ON) { - new_state_idx = drv->safe_state_index; - goto select_state; - } - - /* - * FIXME: we currently manage device-specific idle states - * for PER and CORE in combination with CPU-specific - * idle states. This is wrong, and device-specific - * idle management needs to be separated out into - * its own code. - */ - - /* - * Prevent PER off if CORE is not in retention or off as this - * would disable PER wakeups completely. - */ - cx = cpuidle_get_statedata(&dev->states_usage[index]); - core_next_state = cx->core_state; - per_next_state = per_saved_state = pwrdm_read_next_pwrst(per_pd); - if ((per_next_state == PWRDM_POWER_OFF) && - (core_next_state > PWRDM_POWER_RET)) - per_next_state = PWRDM_POWER_RET; - - /* Are we changing PER target state? */ - if (per_next_state != per_saved_state) - pwrdm_set_next_pwrst(per_pd, per_next_state); - - new_state_idx = next_valid_state(dev, drv, index); - -select_state: - ret = omap3_enter_idle(dev, drv, new_state_idx); - - /* Restore original PER state if it was modified */ - if (per_next_state != per_saved_state) - pwrdm_set_next_pwrst(per_pd, per_saved_state); - - return ret; -} - -DEFINE_PER_CPU(struct cpuidle_device, omap3_idle_dev); - -void omap3_pm_init_cpuidle(struct cpuidle_params *cpuidle_board_params) -{ - int i; - - if (!cpuidle_board_params) - return; - - for (i = 0; i < OMAP3_NUM_STATES; i++) { - cpuidle_params_table[i].valid = cpuidle_board_params[i].valid; - cpuidle_params_table[i].exit_latency = - cpuidle_board_params[i].exit_latency; - cpuidle_params_table[i].target_residency = - cpuidle_board_params[i].target_residency; - } - return; -} - -struct cpuidle_driver omap3_idle_driver = { - .name = "omap3_idle", - .owner = THIS_MODULE, -}; - -/* Helper to fill the C-state common data*/ -static inline void _fill_cstate(struct cpuidle_driver *drv, - int idx, const char *descr) -{ - struct cpuidle_state *state = &drv->states[idx]; - - state->exit_latency = cpuidle_params_table[idx].exit_latency; - state->target_residency = cpuidle_params_table[idx].target_residency; - state->flags = CPUIDLE_FLAG_TIME_VALID; - state->enter = omap3_enter_idle_bm; - sprintf(state->name, "C%d", idx + 1); - strncpy(state->desc, descr, CPUIDLE_DESC_LEN); - -} - -/* Helper to register the driver_data */ -static inline struct omap3_idle_statedata *_fill_cstate_usage( - struct cpuidle_device *dev, - int idx) -{ - struct omap3_idle_statedata *cx = &omap3_idle_data[idx]; - struct cpuidle_state_usage *state_usage = &dev->states_usage[idx]; - - cx->valid = cpuidle_params_table[idx].valid; - cpuidle_set_statedata(state_usage, cx); - - return cx; -} - -/** - * omap3_idle_init - Init routine for OMAP3 idle - * - * Registers the OMAP3 specific cpuidle driver to the cpuidle - * framework with the valid set of states. - */ -int __init omap3_idle_init(void) -{ - struct cpuidle_device *dev; - struct cpuidle_driver *drv = &omap3_idle_driver; - struct omap3_idle_statedata *cx; - - mpu_pd = pwrdm_lookup("mpu_pwrdm"); - core_pd = pwrdm_lookup("core_pwrdm"); - per_pd = pwrdm_lookup("per_pwrdm"); - cam_pd = pwrdm_lookup("cam_pwrdm"); - - - drv->safe_state_index = -1; - dev = &per_cpu(omap3_idle_dev, smp_processor_id()); - - /* C1 . MPU WFI + Core active */ - _fill_cstate(drv, 0, "MPU ON + CORE ON"); - (&drv->states[0])->enter = omap3_enter_idle; - drv->safe_state_index = 0; - cx = _fill_cstate_usage(dev, 0); - cx->valid = 1; /* C1 is always valid */ - cx->mpu_state = PWRDM_POWER_ON; - cx->core_state = PWRDM_POWER_ON; - - /* C2 . MPU WFI + Core inactive */ - _fill_cstate(drv, 1, "MPU ON + CORE ON"); - cx = _fill_cstate_usage(dev, 1); - cx->mpu_state = PWRDM_POWER_ON; - cx->core_state = PWRDM_POWER_ON; - - /* C3 . MPU CSWR + Core inactive */ - _fill_cstate(drv, 2, "MPU RET + CORE ON"); - cx = _fill_cstate_usage(dev, 2); - cx->mpu_state = PWRDM_POWER_RET; - cx->core_state = PWRDM_POWER_ON; - - /* C4 . MPU OFF + Core inactive */ - _fill_cstate(drv, 3, "MPU OFF + CORE ON"); - cx = _fill_cstate_usage(dev, 3); - cx->mpu_state = PWRDM_POWER_OFF; - cx->core_state = PWRDM_POWER_ON; - - /* C5 . MPU RET + Core RET */ - _fill_cstate(drv, 4, "MPU RET + CORE RET"); - cx = _fill_cstate_usage(dev, 4); - cx->mpu_state = PWRDM_POWER_RET; - cx->core_state = PWRDM_POWER_RET; - - /* C6 . MPU OFF + Core RET */ - _fill_cstate(drv, 5, "MPU OFF + CORE RET"); - cx = _fill_cstate_usage(dev, 5); - cx->mpu_state = PWRDM_POWER_OFF; - cx->core_state = PWRDM_POWER_RET; - - /* C7 . MPU OFF + Core OFF */ - _fill_cstate(drv, 6, "MPU OFF + CORE OFF"); - cx = _fill_cstate_usage(dev, 6); - /* - * Erratum i583: implementation for ES rev < Es1.2 on 3630. We cannot - * enable OFF mode in a stable form for previous revisions. - * We disable C7 state as a result. - */ - if (IS_PM34XX_ERRATUM(PM_SDRC_WAKEUP_ERRATUM_i583)) { - cx->valid = 0; - pr_warn("%s: core off state C7 disabled due to i583\n", - __func__); - } - cx->mpu_state = PWRDM_POWER_OFF; - cx->core_state = PWRDM_POWER_OFF; - - drv->state_count = OMAP3_NUM_STATES; - cpuidle_register_driver(&omap3_idle_driver); - - dev->state_count = OMAP3_NUM_STATES; - if (cpuidle_register_device(dev)) { - printk(KERN_ERR "%s: CPUidle register device failed\n", - __func__); - return -EIO; - } - - return 0; -} -#else -int __init omap3_idle_init(void) -{ - return 0; -} -#endif /* CONFIG_CPU_IDLE */ |