| /* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/completion.h> |
| #include <linux/cpuidle.h> |
| #include <linux/interrupt.h> |
| #include <linux/io.h> |
| #include <linux/ktime.h> |
| #include <linux/pm.h> |
| #include <linux/pm_qos_params.h> |
| #include <linux/proc_fs.h> |
| #include <linux/smp.h> |
| #include <linux/suspend.h> |
| #include <linux/tick.h> |
| #include <linux/uaccess.h> |
| #include <linux/wakelock.h> |
| #include <mach/msm_iomap.h> |
| #include <mach/system.h> |
| #include <asm/cacheflush.h> |
| #include <asm/hardware/gic.h> |
| #include <asm/pgtable.h> |
| #include <asm/pgalloc.h> |
| #ifdef CONFIG_VFP |
| #include <asm/vfp.h> |
| #endif |
| |
| #include "acpuclock.h" |
| #include "clock.h" |
| #include "avs.h" |
| #include "cpuidle.h" |
| #include "idle.h" |
| #include "pm.h" |
| #include "rpm_resources.h" |
| #include "scm-boot.h" |
| #include "spm.h" |
| #include "timer.h" |
| #include "qdss.h" |
| |
| /****************************************************************************** |
| * Debug Definitions |
| *****************************************************************************/ |
| |
| enum { |
| MSM_PM_DEBUG_SUSPEND = BIT(0), |
| MSM_PM_DEBUG_POWER_COLLAPSE = BIT(1), |
| MSM_PM_DEBUG_SUSPEND_LIMITS = BIT(2), |
| MSM_PM_DEBUG_CLOCK = BIT(3), |
| MSM_PM_DEBUG_RESET_VECTOR = BIT(4), |
| MSM_PM_DEBUG_IDLE = BIT(6), |
| MSM_PM_DEBUG_IDLE_LIMITS = BIT(7), |
| MSM_PM_DEBUG_HOTPLUG = BIT(8), |
| }; |
| |
| static int msm_pm_debug_mask = 1; |
| module_param_named( |
| debug_mask, msm_pm_debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP |
| ); |
| |
| |
| /****************************************************************************** |
| * Sleep Modes and Parameters |
| *****************************************************************************/ |
| |
| static struct msm_pm_platform_data *msm_pm_modes; |
| static int rpm_cpu0_wakeup_irq; |
| |
| void __init msm_pm_set_platform_data( |
| struct msm_pm_platform_data *data, int count) |
| { |
| BUG_ON(MSM_PM_SLEEP_MODE_NR * num_possible_cpus() > count); |
| msm_pm_modes = data; |
| } |
| |
| void __init msm_pm_set_rpm_wakeup_irq(unsigned int irq) |
| { |
| rpm_cpu0_wakeup_irq = irq; |
| } |
| |
| enum { |
| MSM_PM_MODE_ATTR_SUSPEND, |
| MSM_PM_MODE_ATTR_IDLE, |
| MSM_PM_MODE_ATTR_NR, |
| }; |
| |
| static char *msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_NR] = { |
| [MSM_PM_MODE_ATTR_SUSPEND] = "suspend_enabled", |
| [MSM_PM_MODE_ATTR_IDLE] = "idle_enabled", |
| }; |
| |
| struct msm_pm_kobj_attribute { |
| unsigned int cpu; |
| struct kobj_attribute ka; |
| }; |
| |
| #define GET_CPU_OF_ATTR(attr) \ |
| (container_of(attr, struct msm_pm_kobj_attribute, ka)->cpu) |
| |
| struct msm_pm_sysfs_sleep_mode { |
| struct kobject *kobj; |
| struct attribute_group attr_group; |
| struct attribute *attrs[MSM_PM_MODE_ATTR_NR + 1]; |
| struct msm_pm_kobj_attribute kas[MSM_PM_MODE_ATTR_NR]; |
| }; |
| |
| static char *msm_pm_sleep_mode_labels[MSM_PM_SLEEP_MODE_NR] = { |
| [MSM_PM_SLEEP_MODE_POWER_COLLAPSE] = "power_collapse", |
| [MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT] = "wfi", |
| [MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE] = |
| "standalone_power_collapse", |
| }; |
| |
| /* |
| * Write out the attribute. |
| */ |
| static ssize_t msm_pm_mode_attr_show( |
| struct kobject *kobj, struct kobj_attribute *attr, char *buf) |
| { |
| int ret = -EINVAL; |
| int i; |
| |
| for (i = 0; i < MSM_PM_SLEEP_MODE_NR; i++) { |
| struct kernel_param kp; |
| unsigned int cpu; |
| struct msm_pm_platform_data *mode; |
| |
| if (msm_pm_sleep_mode_labels[i] == NULL) |
| continue; |
| |
| if (strcmp(kobj->name, msm_pm_sleep_mode_labels[i])) |
| continue; |
| |
| cpu = GET_CPU_OF_ATTR(attr); |
| mode = &msm_pm_modes[MSM_PM_MODE(cpu, i)]; |
| |
| if (!strcmp(attr->attr.name, |
| msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_SUSPEND])) { |
| u32 arg = mode->suspend_enabled; |
| kp.arg = &arg; |
| ret = param_get_ulong(buf, &kp); |
| } else if (!strcmp(attr->attr.name, |
| msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_IDLE])) { |
| u32 arg = mode->idle_enabled; |
| kp.arg = &arg; |
| ret = param_get_ulong(buf, &kp); |
| } |
| |
| break; |
| } |
| |
| if (ret > 0) { |
| strcat(buf, "\n"); |
| ret++; |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * Read in the new attribute value. |
| */ |
| static ssize_t msm_pm_mode_attr_store(struct kobject *kobj, |
| struct kobj_attribute *attr, const char *buf, size_t count) |
| { |
| int ret = -EINVAL; |
| int i; |
| |
| for (i = 0; i < MSM_PM_SLEEP_MODE_NR; i++) { |
| struct kernel_param kp; |
| unsigned int cpu; |
| struct msm_pm_platform_data *mode; |
| |
| if (msm_pm_sleep_mode_labels[i] == NULL) |
| continue; |
| |
| if (strcmp(kobj->name, msm_pm_sleep_mode_labels[i])) |
| continue; |
| |
| cpu = GET_CPU_OF_ATTR(attr); |
| mode = &msm_pm_modes[MSM_PM_MODE(cpu, i)]; |
| |
| if (!strcmp(attr->attr.name, |
| msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_SUSPEND])) { |
| kp.arg = &mode->suspend_enabled; |
| ret = param_set_byte(buf, &kp); |
| } else if (!strcmp(attr->attr.name, |
| msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_IDLE])) { |
| kp.arg = &mode->idle_enabled; |
| ret = param_set_byte(buf, &kp); |
| } |
| |
| break; |
| } |
| |
| return ret ? ret : count; |
| } |
| |
| /* |
| * Add sysfs entries for one cpu. |
| */ |
| static int __init msm_pm_mode_sysfs_add_cpu( |
| unsigned int cpu, struct kobject *modes_kobj) |
| { |
| char cpu_name[8]; |
| struct kobject *cpu_kobj; |
| struct msm_pm_sysfs_sleep_mode *mode; |
| int i, j, k; |
| int ret; |
| |
| snprintf(cpu_name, sizeof(cpu_name), "cpu%u", cpu); |
| cpu_kobj = kobject_create_and_add(cpu_name, modes_kobj); |
| if (!cpu_kobj) { |
| pr_err("%s: cannot create %s kobject\n", __func__, cpu_name); |
| ret = -ENOMEM; |
| goto mode_sysfs_add_cpu_exit; |
| } |
| |
| for (i = 0; i < MSM_PM_SLEEP_MODE_NR; i++) { |
| int idx = MSM_PM_MODE(cpu, i); |
| |
| if ((!msm_pm_modes[idx].suspend_supported) |
| && (!msm_pm_modes[idx].idle_supported)) |
| continue; |
| |
| mode = kzalloc(sizeof(*mode), GFP_KERNEL); |
| if (!mode) { |
| pr_err("%s: cannot allocate memory for attributes\n", |
| __func__); |
| ret = -ENOMEM; |
| goto mode_sysfs_add_cpu_exit; |
| } |
| |
| mode->kobj = kobject_create_and_add( |
| msm_pm_sleep_mode_labels[i], cpu_kobj); |
| if (!mode->kobj) { |
| pr_err("%s: cannot create kobject\n", __func__); |
| ret = -ENOMEM; |
| goto mode_sysfs_add_cpu_exit; |
| } |
| |
| for (k = 0, j = 0; k < MSM_PM_MODE_ATTR_NR; k++) { |
| if ((k == MSM_PM_MODE_ATTR_IDLE) && |
| !msm_pm_modes[idx].idle_supported) |
| continue; |
| if ((k == MSM_PM_MODE_ATTR_SUSPEND) && |
| !msm_pm_modes[idx].suspend_supported) |
| continue; |
| mode->kas[j].cpu = cpu; |
| mode->kas[j].ka.attr.mode = 0644; |
| mode->kas[j].ka.show = msm_pm_mode_attr_show; |
| mode->kas[j].ka.store = msm_pm_mode_attr_store; |
| mode->kas[j].ka.attr.name = msm_pm_mode_attr_labels[k]; |
| mode->attrs[j] = &mode->kas[j].ka.attr; |
| j++; |
| } |
| mode->attrs[j] = NULL; |
| |
| mode->attr_group.attrs = mode->attrs; |
| ret = sysfs_create_group(mode->kobj, &mode->attr_group); |
| if (ret) { |
| pr_err("%s: cannot create kobject attribute group\n", |
| __func__); |
| goto mode_sysfs_add_cpu_exit; |
| } |
| } |
| |
| ret = 0; |
| |
| mode_sysfs_add_cpu_exit: |
| return ret; |
| } |
| |
| /* |
| * Add sysfs entries for the sleep modes. |
| */ |
| static int __init msm_pm_mode_sysfs_add(void) |
| { |
| struct kobject *module_kobj; |
| struct kobject *modes_kobj; |
| unsigned int cpu; |
| int ret; |
| |
| module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME); |
| if (!module_kobj) { |
| pr_err("%s: cannot find kobject for module %s\n", |
| __func__, KBUILD_MODNAME); |
| ret = -ENOENT; |
| goto mode_sysfs_add_exit; |
| } |
| |
| modes_kobj = kobject_create_and_add("modes", module_kobj); |
| if (!modes_kobj) { |
| pr_err("%s: cannot create modes kobject\n", __func__); |
| ret = -ENOMEM; |
| goto mode_sysfs_add_exit; |
| } |
| |
| for_each_possible_cpu(cpu) { |
| ret = msm_pm_mode_sysfs_add_cpu(cpu, modes_kobj); |
| if (ret) |
| goto mode_sysfs_add_exit; |
| } |
| |
| ret = 0; |
| |
| mode_sysfs_add_exit: |
| return ret; |
| } |
| |
| /****************************************************************************** |
| * CONFIG_MSM_IDLE_STATS |
| *****************************************************************************/ |
| |
| #ifdef CONFIG_MSM_IDLE_STATS |
| enum msm_pm_time_stats_id { |
| MSM_PM_STAT_REQUESTED_IDLE, |
| MSM_PM_STAT_IDLE_WFI, |
| MSM_PM_STAT_IDLE_STANDALONE_POWER_COLLAPSE, |
| MSM_PM_STAT_IDLE_POWER_COLLAPSE, |
| MSM_PM_STAT_SUSPEND, |
| MSM_PM_STAT_COUNT |
| }; |
| |
| struct msm_pm_time_stats { |
| const char *name; |
| int64_t first_bucket_time; |
| int bucket[CONFIG_MSM_IDLE_STATS_BUCKET_COUNT]; |
| int64_t min_time[CONFIG_MSM_IDLE_STATS_BUCKET_COUNT]; |
| int64_t max_time[CONFIG_MSM_IDLE_STATS_BUCKET_COUNT]; |
| int count; |
| int64_t total_time; |
| }; |
| |
| struct msm_pm_cpu_time_stats { |
| struct msm_pm_time_stats stats[MSM_PM_STAT_COUNT]; |
| }; |
| |
| static DEFINE_SPINLOCK(msm_pm_stats_lock); |
| static DEFINE_PER_CPU_SHARED_ALIGNED( |
| struct msm_pm_cpu_time_stats, msm_pm_stats); |
| |
| /* |
| * Add the given time data to the statistics collection. |
| */ |
| static void msm_pm_add_stat(enum msm_pm_time_stats_id id, int64_t t) |
| { |
| unsigned long flags; |
| struct msm_pm_time_stats *stats; |
| int64_t bt; |
| int i; |
| |
| spin_lock_irqsave(&msm_pm_stats_lock, flags); |
| stats = __get_cpu_var(msm_pm_stats).stats; |
| |
| stats[id].total_time += t; |
| stats[id].count++; |
| |
| bt = t; |
| do_div(bt, stats[id].first_bucket_time); |
| |
| if (bt < 1ULL << (CONFIG_MSM_IDLE_STATS_BUCKET_SHIFT * |
| (CONFIG_MSM_IDLE_STATS_BUCKET_COUNT - 1))) |
| i = DIV_ROUND_UP(fls((uint32_t)bt), |
| CONFIG_MSM_IDLE_STATS_BUCKET_SHIFT); |
| else |
| i = CONFIG_MSM_IDLE_STATS_BUCKET_COUNT - 1; |
| |
| stats[id].bucket[i]++; |
| |
| if (t < stats[id].min_time[i] || !stats[id].max_time[i]) |
| stats[id].min_time[i] = t; |
| if (t > stats[id].max_time[i]) |
| stats[id].max_time[i] = t; |
| |
| spin_unlock_irqrestore(&msm_pm_stats_lock, flags); |
| } |
| |
| /* |
| * Helper function of snprintf where buf is auto-incremented, size is auto- |
| * decremented, and there is no return value. |
| * |
| * NOTE: buf and size must be l-values (e.g. variables) |
| */ |
| #define SNPRINTF(buf, size, format, ...) \ |
| do { \ |
| if (size > 0) { \ |
| int ret; \ |
| ret = snprintf(buf, size, format, ## __VA_ARGS__); \ |
| if (ret > size) { \ |
| buf += size; \ |
| size = 0; \ |
| } else { \ |
| buf += ret; \ |
| size -= ret; \ |
| } \ |
| } \ |
| } while (0) |
| |
| /* |
| * Write out the power management statistics. |
| */ |
| static int msm_pm_read_proc |
| (char *page, char **start, off_t off, int count, int *eof, void *data) |
| { |
| unsigned int cpu = off / MSM_PM_STAT_COUNT; |
| int id = off % MSM_PM_STAT_COUNT; |
| char *p = page; |
| |
| if (count < 1024) { |
| *start = (char *) 0; |
| *eof = 0; |
| return 0; |
| } |
| |
| if (cpu < num_possible_cpus()) { |
| unsigned long flags; |
| struct msm_pm_time_stats *stats; |
| int i; |
| int64_t bucket_time; |
| int64_t s; |
| uint32_t ns; |
| |
| spin_lock_irqsave(&msm_pm_stats_lock, flags); |
| stats = per_cpu(msm_pm_stats, cpu).stats; |
| |
| s = stats[id].total_time; |
| ns = do_div(s, NSEC_PER_SEC); |
| SNPRINTF(p, count, |
| "[cpu %u] %s:\n" |
| " count: %7d\n" |
| " total_time: %lld.%09u\n", |
| cpu, stats[id].name, |
| stats[id].count, |
| s, ns); |
| |
| bucket_time = stats[id].first_bucket_time; |
| for (i = 0; i < CONFIG_MSM_IDLE_STATS_BUCKET_COUNT - 1; i++) { |
| s = bucket_time; |
| ns = do_div(s, NSEC_PER_SEC); |
| SNPRINTF(p, count, |
| " <%6lld.%09u: %7d (%lld-%lld)\n", |
| s, ns, stats[id].bucket[i], |
| stats[id].min_time[i], |
| stats[id].max_time[i]); |
| |
| bucket_time <<= CONFIG_MSM_IDLE_STATS_BUCKET_SHIFT; |
| } |
| |
| SNPRINTF(p, count, " >=%6lld.%09u: %7d (%lld-%lld)\n", |
| s, ns, stats[id].bucket[i], |
| stats[id].min_time[i], |
| stats[id].max_time[i]); |
| |
| *start = (char *) 1; |
| *eof = (off + 1 >= MSM_PM_STAT_COUNT * num_possible_cpus()); |
| |
| spin_unlock_irqrestore(&msm_pm_stats_lock, flags); |
| } |
| |
| return p - page; |
| } |
| #undef SNPRINTF |
| |
| #define MSM_PM_STATS_RESET "reset" |
| |
| /* |
| * Reset the power management statistics values. |
| */ |
| static int msm_pm_write_proc(struct file *file, const char __user *buffer, |
| unsigned long count, void *data) |
| { |
| char buf[sizeof(MSM_PM_STATS_RESET)]; |
| int ret; |
| unsigned long flags; |
| unsigned int cpu; |
| |
| if (count < strlen(MSM_PM_STATS_RESET)) { |
| ret = -EINVAL; |
| goto write_proc_failed; |
| } |
| |
| if (copy_from_user(buf, buffer, strlen(MSM_PM_STATS_RESET))) { |
| ret = -EFAULT; |
| goto write_proc_failed; |
| } |
| |
| if (memcmp(buf, MSM_PM_STATS_RESET, strlen(MSM_PM_STATS_RESET))) { |
| ret = -EINVAL; |
| goto write_proc_failed; |
| } |
| |
| spin_lock_irqsave(&msm_pm_stats_lock, flags); |
| for_each_possible_cpu(cpu) { |
| struct msm_pm_time_stats *stats; |
| int i; |
| |
| stats = per_cpu(msm_pm_stats, cpu).stats; |
| for (i = 0; i < MSM_PM_STAT_COUNT; i++) { |
| memset(stats[i].bucket, |
| 0, sizeof(stats[i].bucket)); |
| memset(stats[i].min_time, |
| 0, sizeof(stats[i].min_time)); |
| memset(stats[i].max_time, |
| 0, sizeof(stats[i].max_time)); |
| stats[i].count = 0; |
| stats[i].total_time = 0; |
| } |
| } |
| |
| spin_unlock_irqrestore(&msm_pm_stats_lock, flags); |
| return count; |
| |
| write_proc_failed: |
| return ret; |
| } |
| #undef MSM_PM_STATS_RESET |
| #endif /* CONFIG_MSM_IDLE_STATS */ |
| |
| |
| /****************************************************************************** |
| * Configure Hardware before/after Low Power Mode |
| *****************************************************************************/ |
| |
| /* |
| * Configure hardware registers in preparation for Apps power down. |
| */ |
| static void msm_pm_config_hw_before_power_down(void) |
| { |
| return; |
| } |
| |
| /* |
| * Clear hardware registers after Apps powers up. |
| */ |
| static void msm_pm_config_hw_after_power_up(void) |
| { |
| return; |
| } |
| |
| /* |
| * Configure hardware registers in preparation for SWFI. |
| */ |
| static void msm_pm_config_hw_before_swfi(void) |
| { |
| return; |
| } |
| |
| |
| /****************************************************************************** |
| * Suspend Max Sleep Time |
| *****************************************************************************/ |
| |
| #ifdef CONFIG_MSM_SLEEP_TIME_OVERRIDE |
| static int msm_pm_sleep_time_override; |
| module_param_named(sleep_time_override, |
| msm_pm_sleep_time_override, int, S_IRUGO | S_IWUSR | S_IWGRP); |
| #endif |
| |
| #define SCLK_HZ (32768) |
| #define MSM_PM_SLEEP_TICK_LIMIT (0x6DDD000) |
| |
| static uint32_t msm_pm_max_sleep_time; |
| |
| /* |
| * Convert time from nanoseconds to slow clock ticks, then cap it to the |
| * specified limit |
| */ |
| static int64_t msm_pm_convert_and_cap_time(int64_t time_ns, int64_t limit) |
| { |
| do_div(time_ns, NSEC_PER_SEC / SCLK_HZ); |
| return (time_ns > limit) ? limit : time_ns; |
| } |
| |
| /* |
| * Set the sleep time for suspend. 0 means infinite sleep time. |
| */ |
| void msm_pm_set_max_sleep_time(int64_t max_sleep_time_ns) |
| { |
| if (max_sleep_time_ns == 0) { |
| msm_pm_max_sleep_time = 0; |
| } else { |
| msm_pm_max_sleep_time = (uint32_t)msm_pm_convert_and_cap_time( |
| max_sleep_time_ns, MSM_PM_SLEEP_TICK_LIMIT); |
| |
| if (msm_pm_max_sleep_time == 0) |
| msm_pm_max_sleep_time = 1; |
| } |
| |
| if (msm_pm_debug_mask & MSM_PM_DEBUG_SUSPEND) |
| pr_info("%s: Requested %lld ns Giving %u sclk ticks\n", |
| __func__, max_sleep_time_ns, msm_pm_max_sleep_time); |
| } |
| EXPORT_SYMBOL(msm_pm_set_max_sleep_time); |
| |
| |
| /****************************************************************************** |
| * |
| *****************************************************************************/ |
| |
| struct msm_pm_device { |
| unsigned int cpu; |
| #ifdef CONFIG_HOTPLUG_CPU |
| struct completion cpu_killed; |
| unsigned int warm_boot; |
| #endif |
| }; |
| |
| static DEFINE_PER_CPU_SHARED_ALIGNED(struct msm_pm_device, msm_pm_devices); |
| static struct msm_rpmrs_limits *msm_pm_idle_rs_limits; |
| |
| static void msm_pm_swfi(void) |
| { |
| msm_pm_config_hw_before_swfi(); |
| msm_arch_idle(); |
| } |
| |
| static bool msm_pm_spm_power_collapse( |
| struct msm_pm_device *dev, bool from_idle, bool notify_rpm) |
| { |
| void *entry; |
| bool collapsed = 0; |
| int ret; |
| |
| if (MSM_PM_DEBUG_POWER_COLLAPSE & msm_pm_debug_mask) |
| pr_info("CPU%u: %s: notify_rpm %d\n", |
| dev->cpu, __func__, (int) notify_rpm); |
| |
| ret = msm_spm_set_low_power_mode( |
| MSM_SPM_MODE_POWER_COLLAPSE, notify_rpm); |
| WARN_ON(ret); |
| |
| entry = (!dev->cpu || from_idle) ? |
| msm_pm_collapse_exit : msm_secondary_startup; |
| msm_pm_write_boot_vector(dev->cpu, virt_to_phys(entry)); |
| |
| if (MSM_PM_DEBUG_RESET_VECTOR & msm_pm_debug_mask) |
| pr_info("CPU%u: %s: program vector to %p\n", |
| dev->cpu, __func__, entry); |
| |
| #ifdef CONFIG_VFP |
| vfp_flush_context(); |
| #endif |
| |
| collapsed = msm_pm_collapse(); |
| |
| if (collapsed) { |
| #ifdef CONFIG_VFP |
| vfp_reinit(); |
| #endif |
| cpu_init(); |
| writel(0xF0, MSM_QGIC_CPU_BASE + GIC_CPU_PRIMASK); |
| writel(1, MSM_QGIC_CPU_BASE + GIC_CPU_CTRL); |
| local_fiq_enable(); |
| } |
| |
| if (MSM_PM_DEBUG_POWER_COLLAPSE & msm_pm_debug_mask) |
| pr_info("CPU%u: %s: msm_pm_collapse returned, collapsed %d\n", |
| dev->cpu, __func__, collapsed); |
| |
| ret = msm_spm_set_low_power_mode(MSM_SPM_MODE_CLOCK_GATING, false); |
| WARN_ON(ret); |
| return collapsed; |
| } |
| |
| static bool msm_pm_power_collapse_standalone(bool from_idle) |
| { |
| struct msm_pm_device *dev = &__get_cpu_var(msm_pm_devices); |
| unsigned int avsdscr_setting; |
| bool collapsed; |
| |
| avsdscr_setting = avs_get_avsdscr(); |
| avs_disable(); |
| collapsed = msm_pm_spm_power_collapse(dev, from_idle, false); |
| avs_reset_delays(avsdscr_setting); |
| return collapsed; |
| } |
| |
| static bool msm_pm_power_collapse(bool from_idle) |
| { |
| struct msm_pm_device *dev = &__get_cpu_var(msm_pm_devices); |
| unsigned long saved_acpuclk_rate; |
| unsigned int avsdscr_setting; |
| bool collapsed; |
| |
| if (MSM_PM_DEBUG_POWER_COLLAPSE & msm_pm_debug_mask) |
| pr_info("CPU%u: %s: idle %d\n", |
| dev->cpu, __func__, (int)from_idle); |
| |
| msm_pm_config_hw_before_power_down(); |
| if (MSM_PM_DEBUG_POWER_COLLAPSE & msm_pm_debug_mask) |
| pr_info("CPU%u: %s: pre power down\n", dev->cpu, __func__); |
| |
| avsdscr_setting = avs_get_avsdscr(); |
| avs_disable(); |
| |
| if (cpu_online(dev->cpu)) |
| saved_acpuclk_rate = acpuclk_power_collapse(); |
| else |
| saved_acpuclk_rate = 0; |
| |
| if (MSM_PM_DEBUG_CLOCK & msm_pm_debug_mask) |
| pr_info("CPU%u: %s: change clock rate (old rate = %lu)\n", |
| dev->cpu, __func__, saved_acpuclk_rate); |
| |
| collapsed = msm_pm_spm_power_collapse(dev, from_idle, true); |
| |
| if (MSM_PM_DEBUG_CLOCK & msm_pm_debug_mask) |
| pr_info("CPU%u: %s: restore clock rate to %lu\n", |
| dev->cpu, __func__, saved_acpuclk_rate); |
| if (acpuclk_set_rate(dev->cpu, saved_acpuclk_rate, SETRATE_PC) < 0) |
| pr_err("CPU%u: %s: failed to restore clock rate(%lu)\n", |
| dev->cpu, __func__, saved_acpuclk_rate); |
| |
| avs_reset_delays(avsdscr_setting); |
| msm_pm_config_hw_after_power_up(); |
| if (MSM_PM_DEBUG_POWER_COLLAPSE & msm_pm_debug_mask) |
| pr_info("CPU%u: %s: post power up\n", dev->cpu, __func__); |
| |
| if (MSM_PM_DEBUG_POWER_COLLAPSE & msm_pm_debug_mask) |
| pr_info("CPU%u: %s: return\n", dev->cpu, __func__); |
| return collapsed; |
| } |
| |
| static irqreturn_t msm_pm_rpm_wakeup_interrupt(int irq, void *dev_id) |
| { |
| if (dev_id != &msm_pm_rpm_wakeup_interrupt) |
| return IRQ_NONE; |
| |
| return IRQ_HANDLED; |
| } |
| |
| |
| /****************************************************************************** |
| * External Idle/Suspend Functions |
| *****************************************************************************/ |
| |
| void arch_idle(void) |
| { |
| return; |
| } |
| |
| int msm_pm_idle_prepare(struct cpuidle_device *dev) |
| { |
| uint32_t latency_us; |
| uint32_t sleep_us; |
| int i; |
| |
| latency_us = (uint32_t) pm_qos_request(PM_QOS_CPU_DMA_LATENCY); |
| sleep_us = (uint32_t) ktime_to_ns(tick_nohz_get_sleep_length()); |
| sleep_us = DIV_ROUND_UP(sleep_us, 1000); |
| |
| for (i = 0; i < dev->state_count; i++) { |
| struct cpuidle_state *state = &dev->states[i]; |
| enum msm_pm_sleep_mode mode; |
| bool allow; |
| struct msm_rpmrs_limits *rs_limits = NULL; |
| int idx; |
| |
| mode = (enum msm_pm_sleep_mode) state->driver_data; |
| idx = MSM_PM_MODE(dev->cpu, mode); |
| |
| allow = msm_pm_modes[idx].idle_enabled && |
| msm_pm_modes[idx].idle_supported; |
| |
| switch (mode) { |
| case MSM_PM_SLEEP_MODE_POWER_COLLAPSE: |
| if (!allow) |
| break; |
| |
| if (num_online_cpus() > 1) { |
| allow = false; |
| break; |
| } |
| #ifdef CONFIG_HAS_WAKELOCK |
| if (has_wake_lock(WAKE_LOCK_IDLE)) { |
| allow = false; |
| break; |
| } |
| #endif |
| /* fall through */ |
| |
| case MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE: |
| if (!allow) |
| break; |
| |
| if (!dev->cpu && |
| msm_rpm_local_request_is_outstanding()) { |
| allow = false; |
| break; |
| } |
| /* fall through */ |
| |
| case MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT: |
| if (!allow) |
| break; |
| |
| rs_limits = msm_rpmrs_lowest_limits(true, |
| mode, latency_us, sleep_us); |
| |
| if (MSM_PM_DEBUG_IDLE & msm_pm_debug_mask) |
| pr_info("CPU%u: %s: %s, latency %uus, " |
| "sleep %uus, limit %p\n", |
| dev->cpu, __func__, state->desc, |
| latency_us, sleep_us, rs_limits); |
| |
| if ((MSM_PM_DEBUG_IDLE_LIMITS & msm_pm_debug_mask) && |
| rs_limits) |
| pr_info("CPU%u: %s: limit %p: " |
| "pxo %d, l2_cache %d, " |
| "vdd_mem %d, vdd_dig %d\n", |
| dev->cpu, __func__, rs_limits, |
| rs_limits->pxo, |
| rs_limits->l2_cache, |
| rs_limits->vdd_mem, |
| rs_limits->vdd_dig); |
| |
| if (!rs_limits) |
| allow = false; |
| break; |
| |
| default: |
| allow = false; |
| break; |
| } |
| |
| if (MSM_PM_DEBUG_IDLE & msm_pm_debug_mask) |
| pr_info("CPU%u: %s: allow %s: %d\n", |
| dev->cpu, __func__, state->desc, (int)allow); |
| |
| if (allow) { |
| state->flags &= ~CPUIDLE_FLAG_IGNORE; |
| state->target_residency = 0; |
| state->exit_latency = 0; |
| state->power_usage = rs_limits->power[dev->cpu]; |
| |
| if (MSM_PM_SLEEP_MODE_POWER_COLLAPSE == mode) |
| msm_pm_idle_rs_limits = rs_limits; |
| } else { |
| state->flags |= CPUIDLE_FLAG_IGNORE; |
| } |
| } |
| |
| return 0; |
| } |
| |
| int msm_pm_idle_enter(enum msm_pm_sleep_mode sleep_mode) |
| { |
| int64_t time; |
| #ifdef CONFIG_MSM_IDLE_STATS |
| int exit_stat; |
| #endif |
| |
| if (MSM_PM_DEBUG_IDLE & msm_pm_debug_mask) |
| pr_info("CPU%u: %s: mode %d\n", |
| smp_processor_id(), __func__, sleep_mode); |
| |
| time = ktime_to_ns(ktime_get()); |
| |
| switch (sleep_mode) { |
| case MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT: |
| msm_pm_swfi(); |
| #ifdef CONFIG_MSM_IDLE_STATS |
| exit_stat = MSM_PM_STAT_IDLE_WFI; |
| #endif |
| break; |
| |
| case MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE: |
| msm_pm_power_collapse_standalone(true); |
| #ifdef CONFIG_MSM_IDLE_STATS |
| exit_stat = MSM_PM_STAT_IDLE_STANDALONE_POWER_COLLAPSE; |
| #endif |
| break; |
| |
| case MSM_PM_SLEEP_MODE_POWER_COLLAPSE: { |
| int64_t timer_expiration = msm_timer_enter_idle(); |
| bool timer_halted = false; |
| uint32_t sleep_delay; |
| int ret; |
| int notify_rpm = |
| (sleep_mode == MSM_PM_SLEEP_MODE_POWER_COLLAPSE); |
| int collapsed; |
| |
| sleep_delay = (uint32_t) msm_pm_convert_and_cap_time( |
| timer_expiration, MSM_PM_SLEEP_TICK_LIMIT); |
| if (sleep_delay == 0) /* 0 would mean infinite time */ |
| sleep_delay = 1; |
| |
| ret = msm_rpmrs_enter_sleep( |
| sleep_delay, msm_pm_idle_rs_limits, true, notify_rpm); |
| if (!ret) { |
| collapsed = msm_pm_power_collapse(true); |
| timer_halted = true; |
| |
| msm_rpmrs_exit_sleep(msm_pm_idle_rs_limits, true, |
| notify_rpm, collapsed); |
| } |
| |
| msm_timer_exit_idle((int) timer_halted); |
| #ifdef CONFIG_MSM_IDLE_STATS |
| exit_stat = MSM_PM_STAT_IDLE_POWER_COLLAPSE; |
| #endif |
| break; |
| } |
| |
| default: |
| __WARN(); |
| goto cpuidle_enter_bail; |
| } |
| |
| time = ktime_to_ns(ktime_get()) - time; |
| #ifdef CONFIG_MSM_IDLE_STATS |
| msm_pm_add_stat(exit_stat, time); |
| #endif |
| |
| do_div(time, 1000); |
| return (int) time; |
| |
| cpuidle_enter_bail: |
| return 0; |
| } |
| |
| static int msm_pm_enter(suspend_state_t state) |
| { |
| bool allow[MSM_PM_SLEEP_MODE_NR]; |
| int i; |
| |
| #ifdef CONFIG_MSM_IDLE_STATS |
| int64_t period = 0; |
| int64_t time = msm_timer_get_sclk_time(&period); |
| #endif |
| |
| if (MSM_PM_DEBUG_SUSPEND & msm_pm_debug_mask) |
| pr_info("%s\n", __func__); |
| |
| if (smp_processor_id()) { |
| __WARN(); |
| goto enter_exit; |
| } |
| |
| |
| for (i = 0; i < MSM_PM_SLEEP_MODE_NR; i++) { |
| struct msm_pm_platform_data *mode; |
| |
| mode = &msm_pm_modes[MSM_PM_MODE(0, i)]; |
| allow[i] = mode->suspend_supported && mode->suspend_enabled; |
| } |
| |
| if (allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE]) { |
| struct msm_rpmrs_limits *rs_limits; |
| int ret; |
| |
| if (MSM_PM_DEBUG_SUSPEND & msm_pm_debug_mask) |
| pr_info("%s: power collapse\n", __func__); |
| |
| clock_debug_print_enabled(); |
| |
| #ifdef CONFIG_MSM_SLEEP_TIME_OVERRIDE |
| if (msm_pm_sleep_time_override > 0) { |
| int64_t ns = NSEC_PER_SEC * |
| (int64_t) msm_pm_sleep_time_override; |
| msm_pm_set_max_sleep_time(ns); |
| msm_pm_sleep_time_override = 0; |
| } |
| #endif /* CONFIG_MSM_SLEEP_TIME_OVERRIDE */ |
| |
| if (MSM_PM_DEBUG_SUSPEND_LIMITS & msm_pm_debug_mask) |
| msm_rpmrs_show_resources(); |
| |
| rs_limits = msm_rpmrs_lowest_limits(false, |
| MSM_PM_SLEEP_MODE_POWER_COLLAPSE, -1, -1); |
| |
| if ((MSM_PM_DEBUG_SUSPEND_LIMITS & msm_pm_debug_mask) && |
| rs_limits) |
| pr_info("%s: limit %p: pxo %d, l2_cache %d, " |
| "vdd_mem %d, vdd_dig %d\n", |
| __func__, rs_limits, |
| rs_limits->pxo, rs_limits->l2_cache, |
| rs_limits->vdd_mem, rs_limits->vdd_dig); |
| |
| if (rs_limits) { |
| ret = msm_rpmrs_enter_sleep( |
| msm_pm_max_sleep_time, rs_limits, false, true); |
| if (!ret) { |
| int collapsed = msm_pm_power_collapse(false); |
| msm_rpmrs_exit_sleep(rs_limits, false, true, |
| collapsed); |
| } |
| } else { |
| pr_err("%s: cannot find the lowest power limit\n", |
| __func__); |
| } |
| |
| #ifdef CONFIG_MSM_IDLE_STATS |
| if (time != 0) { |
| int64_t end_time = msm_timer_get_sclk_time(NULL); |
| if (end_time != 0) { |
| time = end_time - time; |
| if (time < 0) |
| time += period; |
| } else |
| time = 0; |
| } |
| |
| msm_pm_add_stat(MSM_PM_STAT_SUSPEND, time); |
| #endif /* CONFIG_MSM_IDLE_STATS */ |
| } else if (allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE]) { |
| if (MSM_PM_DEBUG_SUSPEND & msm_pm_debug_mask) |
| pr_info("%s: standalone power collapse\n", __func__); |
| msm_pm_power_collapse_standalone(false); |
| } else if (allow[MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT]) { |
| if (MSM_PM_DEBUG_SUSPEND & msm_pm_debug_mask) |
| pr_info("%s: swfi\n", __func__); |
| msm_pm_swfi(); |
| } |
| |
| |
| enter_exit: |
| if (MSM_PM_DEBUG_SUSPEND & msm_pm_debug_mask) |
| pr_info("%s: return\n", __func__); |
| |
| return 0; |
| } |
| |
| static struct platform_suspend_ops msm_pm_ops = { |
| .enter = msm_pm_enter, |
| .valid = suspend_valid_only_mem, |
| }; |
| |
| #ifdef CONFIG_HOTPLUG_CPU |
| int platform_cpu_disable(unsigned int cpu) |
| { |
| return cpu == 0 ? -EPERM : 0; |
| } |
| |
| int platform_cpu_kill(unsigned int cpu) |
| { |
| struct completion *killed = &per_cpu(msm_pm_devices, cpu).cpu_killed; |
| return wait_for_completion_timeout(killed, HZ * 5); |
| } |
| |
| void platform_cpu_die(unsigned int cpu) |
| { |
| bool allow[MSM_PM_SLEEP_MODE_NR]; |
| int i; |
| |
| if (unlikely(cpu != smp_processor_id())) { |
| pr_crit("%s: running on %u, should be %u\n", |
| __func__, smp_processor_id(), cpu); |
| BUG(); |
| } |
| |
| for (i = 0; i < MSM_PM_SLEEP_MODE_NR; i++) { |
| struct msm_pm_platform_data *mode; |
| |
| mode = &msm_pm_modes[MSM_PM_MODE(cpu, i)]; |
| allow[i] = mode->suspend_supported && mode->suspend_enabled; |
| } |
| |
| if (MSM_PM_DEBUG_HOTPLUG & msm_pm_debug_mask) |
| pr_notice("CPU%u: %s: shutting down cpu\n", cpu, __func__); |
| complete(&__get_cpu_var(msm_pm_devices).cpu_killed); |
| |
| flush_cache_all(); |
| |
| for (;;) { |
| if (allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE]) |
| msm_pm_power_collapse(false); |
| else if (allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE]) |
| msm_pm_power_collapse_standalone(false); |
| else if (allow[MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT]) |
| msm_pm_swfi(); |
| |
| if (pen_release == cpu) { |
| /* OK, proper wakeup, we're done */ |
| break; |
| } |
| } |
| |
| pen_release = -1; |
| pr_notice("CPU%u: %s: normal wakeup\n", cpu, __func__); |
| } |
| |
| int msm_pm_platform_secondary_init(unsigned int cpu) |
| { |
| int ret; |
| struct msm_pm_device *dev = &__get_cpu_var(msm_pm_devices); |
| |
| if (!dev->warm_boot) { |
| dev->warm_boot = 1; |
| return 0; |
| } |
| etm_restore_reg_check(); |
| #ifdef CONFIG_VFP |
| vfp_reinit(); |
| #endif |
| ret = msm_spm_set_low_power_mode(MSM_SPM_MODE_CLOCK_GATING, false); |
| |
| return ret; |
| } |
| #endif /* CONFIG_HOTPLUG_CPU */ |
| |
| /****************************************************************************** |
| * Initialization routine |
| *****************************************************************************/ |
| |
| static int __init msm_pm_init(void) |
| { |
| pgd_t *pc_pgd; |
| pmd_t *pmd; |
| unsigned long pmdval; |
| unsigned int cpu; |
| #ifdef CONFIG_MSM_IDLE_STATS |
| struct proc_dir_entry *d_entry; |
| #endif |
| int ret; |
| |
| /* Page table for cores to come back up safely. */ |
| pc_pgd = pgd_alloc(&init_mm); |
| if (!pc_pgd) |
| return -ENOMEM; |
| |
| pmd = pmd_offset(pc_pgd + |
| pgd_index(virt_to_phys(msm_pm_collapse_exit)), |
| virt_to_phys(msm_pm_collapse_exit)); |
| pmdval = (virt_to_phys(msm_pm_collapse_exit) & PGDIR_MASK) | |
| PMD_TYPE_SECT | PMD_SECT_AP_WRITE; |
| pmd[0] = __pmd(pmdval); |
| pmd[1] = __pmd(pmdval + (1 << (PGDIR_SHIFT - 1))); |
| |
| /* It is remotely possible that the code in msm_pm_collapse_exit() |
| * which turns on the MMU with this mapping is in the |
| * next even-numbered megabyte beyond the |
| * start of msm_pm_collapse_exit(). |
| * Map this megabyte in as well. |
| */ |
| pmd[2] = __pmd(pmdval + (2 << (PGDIR_SHIFT - 1))); |
| flush_pmd_entry(pmd); |
| msm_pm_pc_pgd = virt_to_phys(pc_pgd); |
| |
| ret = request_irq(rpm_cpu0_wakeup_irq, |
| msm_pm_rpm_wakeup_interrupt, IRQF_TRIGGER_RISING, |
| "pm_drv", msm_pm_rpm_wakeup_interrupt); |
| if (ret) { |
| pr_err("%s: failed to request irq %u: %d\n", |
| __func__, rpm_cpu0_wakeup_irq, ret); |
| return ret; |
| } |
| |
| ret = irq_set_irq_wake(rpm_cpu0_wakeup_irq, 1); |
| if (ret) { |
| pr_err("%s: failed to set wakeup irq %u: %d\n", |
| __func__, rpm_cpu0_wakeup_irq, ret); |
| return ret; |
| } |
| |
| for_each_possible_cpu(cpu) { |
| struct msm_pm_device *dev = &per_cpu(msm_pm_devices, cpu); |
| |
| dev->cpu = cpu; |
| #ifdef CONFIG_HOTPLUG_CPU |
| init_completion(&dev->cpu_killed); |
| #endif |
| } |
| |
| ret = scm_set_boot_addr((void *)virt_to_phys(msm_pm_boot_entry), |
| SCM_FLAG_WARMBOOT_CPU0 | SCM_FLAG_WARMBOOT_CPU1); |
| if (ret) { |
| pr_err("%s: failed to set up scm boot addr: %d\n", |
| __func__, ret); |
| return ret; |
| } |
| |
| #ifdef CONFIG_MSM_IDLE_STATS |
| for_each_possible_cpu(cpu) { |
| struct msm_pm_time_stats *stats = |
| per_cpu(msm_pm_stats, cpu).stats; |
| |
| stats[MSM_PM_STAT_REQUESTED_IDLE].name = "idle-request"; |
| stats[MSM_PM_STAT_REQUESTED_IDLE].first_bucket_time = |
| CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| |
| stats[MSM_PM_STAT_IDLE_WFI].name = "idle-wfi"; |
| stats[MSM_PM_STAT_IDLE_WFI].first_bucket_time = |
| CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| |
| stats[MSM_PM_STAT_IDLE_STANDALONE_POWER_COLLAPSE].name = |
| "idle-standalone-power-collapse"; |
| stats[MSM_PM_STAT_IDLE_STANDALONE_POWER_COLLAPSE]. |
| first_bucket_time = CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| |
| stats[MSM_PM_STAT_IDLE_POWER_COLLAPSE].name = |
| "idle-power-collapse"; |
| stats[MSM_PM_STAT_IDLE_POWER_COLLAPSE].first_bucket_time = |
| CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| |
| stats[MSM_PM_STAT_SUSPEND].name = "suspend"; |
| stats[MSM_PM_STAT_SUSPEND].first_bucket_time = |
| CONFIG_MSM_SUSPEND_STATS_FIRST_BUCKET; |
| } |
| |
| d_entry = create_proc_entry("msm_pm_stats", |
| S_IRUGO | S_IWUSR | S_IWGRP, NULL); |
| if (d_entry) { |
| d_entry->read_proc = msm_pm_read_proc; |
| d_entry->write_proc = msm_pm_write_proc; |
| d_entry->data = NULL; |
| } |
| #endif /* CONFIG_MSM_IDLE_STATS */ |
| |
| msm_pm_mode_sysfs_add(); |
| msm_spm_allow_x_cpu_set_vdd(false); |
| |
| suspend_set_ops(&msm_pm_ops); |
| msm_cpuidle_init(); |
| |
| return 0; |
| } |
| |
| late_initcall(msm_pm_init); |