Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1 | /* arch/arm/mach-msm/pm2.c |
| 2 | * |
| 3 | * MSM Power Management Routines |
| 4 | * |
| 5 | * Copyright (C) 2007 Google, Inc. |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 6 | * Copyright (c) 2008-2012 Code Aurora Forum. All rights reserved. |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 7 | * |
| 8 | * This software is licensed under the terms of the GNU General Public |
| 9 | * License version 2, as published by the Free Software Foundation, and |
| 10 | * may be copied, distributed, and modified under those terms. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | */ |
| 18 | |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/clk.h> |
| 22 | #include <linux/delay.h> |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/pm.h> |
| 25 | #include <linux/pm_qos_params.h> |
| 26 | #include <linux/proc_fs.h> |
| 27 | #include <linux/suspend.h> |
| 28 | #include <linux/reboot.h> |
| 29 | #include <linux/uaccess.h> |
| 30 | #include <linux/io.h> |
| 31 | #include <linux/memory.h> |
| 32 | #ifdef CONFIG_HAS_WAKELOCK |
| 33 | #include <linux/wakelock.h> |
| 34 | #endif |
| 35 | #include <mach/msm_iomap.h> |
| 36 | #include <mach/system.h> |
| 37 | #ifdef CONFIG_CPU_V7 |
| 38 | #include <asm/pgtable.h> |
| 39 | #include <asm/pgalloc.h> |
| 40 | #endif |
| 41 | #ifdef CONFIG_CACHE_L2X0 |
| 42 | #include <asm/hardware/cache-l2x0.h> |
| 43 | #endif |
| 44 | #ifdef CONFIG_VFP |
| 45 | #include <asm/vfp.h> |
| 46 | #endif |
| 47 | |
| 48 | #ifdef CONFIG_MSM_MEMORY_LOW_POWER_MODE_SUSPEND_DEEP_POWER_DOWN |
| 49 | #include <mach/msm_migrate_pages.h> |
| 50 | #endif |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 51 | #include <mach/socinfo.h> |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 52 | |
| 53 | #include "smd_private.h" |
| 54 | #include "smd_rpcrouter.h" |
| 55 | #include "acpuclock.h" |
| 56 | #include "clock.h" |
| 57 | #include "proc_comm.h" |
| 58 | #include "idle.h" |
| 59 | #include "irq.h" |
| 60 | #include "gpio.h" |
| 61 | #include "timer.h" |
Matt Wagantall | 7cca464 | 2012-02-01 16:43:24 -0800 | [diff] [blame] | 62 | #include "pm.h" |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 63 | #include "spm.h" |
| 64 | #include "sirc.h" |
Maheshkumar Sivasubramanian | 8ccc16e | 2011-10-25 15:59:57 -0600 | [diff] [blame] | 65 | #include "pm-boot.h" |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 66 | |
| 67 | /****************************************************************************** |
| 68 | * Debug Definitions |
| 69 | *****************************************************************************/ |
| 70 | |
| 71 | enum { |
Murali Nalajala | a7efba1 | 2012-02-23 18:13:52 +0530 | [diff] [blame] | 72 | MSM_PM_DEBUG_SUSPEND = BIT(0), |
| 73 | MSM_PM_DEBUG_POWER_COLLAPSE = BIT(1), |
| 74 | MSM_PM_DEBUG_STATE = BIT(2), |
| 75 | MSM_PM_DEBUG_CLOCK = BIT(3), |
| 76 | MSM_PM_DEBUG_RESET_VECTOR = BIT(4), |
| 77 | MSM_PM_DEBUG_SMSM_STATE = BIT(5), |
| 78 | MSM_PM_DEBUG_IDLE = BIT(6), |
| 79 | MSM_PM_DEBUG_HOTPLUG = BIT(7), |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 80 | }; |
| 81 | |
| 82 | static int msm_pm_debug_mask; |
Taniya Das | e30a6b2 | 2012-03-20 11:37:45 +0530 | [diff] [blame] | 83 | int power_collapsed; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 84 | module_param_named( |
| 85 | debug_mask, msm_pm_debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP |
| 86 | ); |
| 87 | |
| 88 | #define MSM_PM_DPRINTK(mask, level, message, ...) \ |
| 89 | do { \ |
| 90 | if ((mask) & msm_pm_debug_mask) \ |
| 91 | printk(level message, ## __VA_ARGS__); \ |
| 92 | } while (0) |
| 93 | |
| 94 | #define MSM_PM_DEBUG_PRINT_STATE(tag) \ |
| 95 | do { \ |
| 96 | MSM_PM_DPRINTK(MSM_PM_DEBUG_STATE, \ |
| 97 | KERN_INFO, "%s: " \ |
| 98 | "APPS_CLK_SLEEP_EN %x, APPS_PWRDOWN %x, " \ |
| 99 | "SMSM_POWER_MASTER_DEM %x, SMSM_MODEM_STATE %x, " \ |
| 100 | "SMSM_APPS_DEM %x\n", \ |
| 101 | tag, \ |
| 102 | __raw_readl(APPS_CLK_SLEEP_EN), \ |
| 103 | __raw_readl(APPS_PWRDOWN), \ |
| 104 | smsm_get_state(SMSM_POWER_MASTER_DEM), \ |
| 105 | smsm_get_state(SMSM_MODEM_STATE), \ |
| 106 | smsm_get_state(SMSM_APPS_DEM)); \ |
| 107 | } while (0) |
| 108 | |
| 109 | #define MSM_PM_DEBUG_PRINT_SLEEP_INFO() \ |
| 110 | do { \ |
| 111 | if (msm_pm_debug_mask & MSM_PM_DEBUG_SMSM_STATE) \ |
| 112 | smsm_print_sleep_info(msm_pm_smem_data->sleep_time, \ |
| 113 | msm_pm_smem_data->resources_used, \ |
| 114 | msm_pm_smem_data->irq_mask, \ |
| 115 | msm_pm_smem_data->wakeup_reason, \ |
| 116 | msm_pm_smem_data->pending_irqs); \ |
| 117 | } while (0) |
| 118 | |
| 119 | |
| 120 | /****************************************************************************** |
| 121 | * Sleep Modes and Parameters |
| 122 | *****************************************************************************/ |
| 123 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 124 | static int msm_pm_idle_sleep_min_time = CONFIG_MSM7X00A_IDLE_SLEEP_MIN_TIME; |
| 125 | module_param_named( |
| 126 | idle_sleep_min_time, msm_pm_idle_sleep_min_time, |
| 127 | int, S_IRUGO | S_IWUSR | S_IWGRP |
| 128 | ); |
| 129 | |
| 130 | enum { |
| 131 | MSM_PM_MODE_ATTR_SUSPEND, |
| 132 | MSM_PM_MODE_ATTR_IDLE, |
| 133 | MSM_PM_MODE_ATTR_LATENCY, |
| 134 | MSM_PM_MODE_ATTR_RESIDENCY, |
| 135 | MSM_PM_MODE_ATTR_NR, |
| 136 | }; |
| 137 | |
| 138 | static char *msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_NR] = { |
| 139 | [MSM_PM_MODE_ATTR_SUSPEND] = "suspend_enabled", |
| 140 | [MSM_PM_MODE_ATTR_IDLE] = "idle_enabled", |
| 141 | [MSM_PM_MODE_ATTR_LATENCY] = "latency", |
| 142 | [MSM_PM_MODE_ATTR_RESIDENCY] = "residency", |
| 143 | }; |
| 144 | |
| 145 | static char *msm_pm_sleep_mode_labels[MSM_PM_SLEEP_MODE_NR] = { |
| 146 | [MSM_PM_SLEEP_MODE_POWER_COLLAPSE_SUSPEND] = " ", |
| 147 | [MSM_PM_SLEEP_MODE_POWER_COLLAPSE] = "power_collapse", |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 148 | [MSM_PM_SLEEP_MODE_RAMP_DOWN_AND_WAIT_FOR_INTERRUPT] = |
| 149 | "ramp_down_and_wfi", |
| 150 | [MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT] = "wfi", |
| 151 | [MSM_PM_SLEEP_MODE_POWER_COLLAPSE_NO_XO_SHUTDOWN] = |
| 152 | "power_collapse_no_xo_shutdown", |
| 153 | [MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE] = |
| 154 | "standalone_power_collapse", |
| 155 | }; |
| 156 | |
| 157 | static struct msm_pm_platform_data *msm_pm_modes; |
Murali Nalajala | 2a0bbda | 2012-03-28 12:12:54 +0530 | [diff] [blame^] | 158 | static struct msm_pm_irq_calls *msm_pm_irq_extns; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 159 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 160 | struct msm_pm_kobj_attribute { |
| 161 | unsigned int cpu; |
| 162 | struct kobj_attribute ka; |
| 163 | }; |
| 164 | |
| 165 | #define GET_CPU_OF_ATTR(attr) \ |
| 166 | (container_of(attr, struct msm_pm_kobj_attribute, ka)->cpu) |
| 167 | |
| 168 | struct msm_pm_sysfs_sleep_mode { |
| 169 | struct kobject *kobj; |
| 170 | struct attribute_group attr_group; |
| 171 | struct attribute *attrs[MSM_PM_MODE_ATTR_NR + 1]; |
| 172 | struct msm_pm_kobj_attribute kas[MSM_PM_MODE_ATTR_NR]; |
| 173 | }; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 174 | |
| 175 | /* |
| 176 | * Write out the attribute. |
| 177 | */ |
| 178 | static ssize_t msm_pm_mode_attr_show( |
| 179 | struct kobject *kobj, struct kobj_attribute *attr, char *buf) |
| 180 | { |
| 181 | int ret = -EINVAL; |
| 182 | int i; |
| 183 | |
| 184 | for (i = 0; i < MSM_PM_SLEEP_MODE_NR; i++) { |
| 185 | struct kernel_param kp; |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 186 | unsigned int cpu; |
| 187 | struct msm_pm_platform_data *mode; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 188 | |
| 189 | if (msm_pm_sleep_mode_labels[i] == NULL) |
| 190 | continue; |
| 191 | |
| 192 | if (strcmp(kobj->name, msm_pm_sleep_mode_labels[i])) |
| 193 | continue; |
| 194 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 195 | cpu = GET_CPU_OF_ATTR(attr); |
| 196 | mode = &msm_pm_modes[MSM_PM_MODE(cpu, i)]; |
| 197 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 198 | if (!strcmp(attr->attr.name, |
| 199 | msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_SUSPEND])) { |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 200 | u32 arg = mode->suspend_enabled; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 201 | kp.arg = &arg; |
| 202 | ret = param_get_ulong(buf, &kp); |
| 203 | } else if (!strcmp(attr->attr.name, |
| 204 | msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_IDLE])) { |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 205 | u32 arg = mode->idle_enabled; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 206 | kp.arg = &arg; |
| 207 | ret = param_get_ulong(buf, &kp); |
| 208 | } else if (!strcmp(attr->attr.name, |
| 209 | msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_LATENCY])) { |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 210 | u32 arg = mode->latency; |
| 211 | kp.arg = &arg; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 212 | ret = param_get_ulong(buf, &kp); |
| 213 | } else if (!strcmp(attr->attr.name, |
| 214 | msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_RESIDENCY])) { |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 215 | u32 arg = mode->residency; |
| 216 | kp.arg = &arg; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 217 | ret = param_get_ulong(buf, &kp); |
| 218 | } |
| 219 | |
| 220 | break; |
| 221 | } |
| 222 | |
| 223 | if (ret > 0) { |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 224 | strlcat(buf, "\n", PAGE_SIZE); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 225 | ret++; |
| 226 | } |
| 227 | |
| 228 | return ret; |
| 229 | } |
| 230 | |
| 231 | /* |
| 232 | * Read in the new attribute value. |
| 233 | */ |
| 234 | static ssize_t msm_pm_mode_attr_store(struct kobject *kobj, |
| 235 | struct kobj_attribute *attr, const char *buf, size_t count) |
| 236 | { |
| 237 | int ret = -EINVAL; |
| 238 | int i; |
| 239 | |
| 240 | for (i = 0; i < MSM_PM_SLEEP_MODE_NR; i++) { |
| 241 | struct kernel_param kp; |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 242 | unsigned int cpu; |
| 243 | struct msm_pm_platform_data *mode; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 244 | |
| 245 | if (msm_pm_sleep_mode_labels[i] == NULL) |
| 246 | continue; |
| 247 | |
| 248 | if (strcmp(kobj->name, msm_pm_sleep_mode_labels[i])) |
| 249 | continue; |
| 250 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 251 | cpu = GET_CPU_OF_ATTR(attr); |
| 252 | mode = &msm_pm_modes[MSM_PM_MODE(cpu, i)]; |
| 253 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 254 | if (!strcmp(attr->attr.name, |
| 255 | msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_SUSPEND])) { |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 256 | kp.arg = &mode->suspend_enabled; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 257 | ret = param_set_byte(buf, &kp); |
| 258 | } else if (!strcmp(attr->attr.name, |
| 259 | msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_IDLE])) { |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 260 | kp.arg = &mode->idle_enabled; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 261 | ret = param_set_byte(buf, &kp); |
| 262 | } else if (!strcmp(attr->attr.name, |
| 263 | msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_LATENCY])) { |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 264 | kp.arg = &mode->latency; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 265 | ret = param_set_ulong(buf, &kp); |
| 266 | } else if (!strcmp(attr->attr.name, |
| 267 | msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_RESIDENCY])) { |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 268 | kp.arg = &mode->residency; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 269 | ret = param_set_ulong(buf, &kp); |
| 270 | } |
| 271 | |
| 272 | break; |
| 273 | } |
| 274 | |
| 275 | return ret ? ret : count; |
| 276 | } |
| 277 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 278 | /* Add sysfs entries for one cpu. */ |
| 279 | static int __init msm_pm_mode_sysfs_add_cpu( |
| 280 | unsigned int cpu, struct kobject *modes_kobj) |
| 281 | { |
| 282 | char cpu_name[8]; |
| 283 | struct kobject *cpu_kobj; |
| 284 | struct msm_pm_sysfs_sleep_mode *mode = NULL; |
| 285 | int i, j, k; |
| 286 | int ret; |
| 287 | |
| 288 | snprintf(cpu_name, sizeof(cpu_name), "cpu%u", cpu); |
| 289 | cpu_kobj = kobject_create_and_add(cpu_name, modes_kobj); |
| 290 | if (!cpu_kobj) { |
| 291 | pr_err("%s: cannot create %s kobject\n", __func__, cpu_name); |
| 292 | ret = -ENOMEM; |
| 293 | goto mode_sysfs_add_cpu_exit; |
| 294 | } |
| 295 | |
| 296 | for (i = 0; i < MSM_PM_SLEEP_MODE_NR; i++) { |
| 297 | int idx = MSM_PM_MODE(cpu, i); |
| 298 | |
| 299 | if ((!msm_pm_modes[idx].suspend_supported) && |
| 300 | (!msm_pm_modes[idx].idle_supported)) |
| 301 | continue; |
| 302 | |
| 303 | mode = kzalloc(sizeof(*mode), GFP_KERNEL); |
| 304 | if (!mode) { |
| 305 | pr_err("%s: cannot allocate memory for attributes\n", |
| 306 | __func__); |
| 307 | ret = -ENOMEM; |
| 308 | goto mode_sysfs_add_cpu_exit; |
| 309 | } |
| 310 | |
| 311 | mode->kobj = kobject_create_and_add( |
| 312 | msm_pm_sleep_mode_labels[i], cpu_kobj); |
| 313 | if (!mode->kobj) { |
| 314 | pr_err("%s: cannot create kobject\n", __func__); |
| 315 | ret = -ENOMEM; |
| 316 | goto mode_sysfs_add_cpu_exit; |
| 317 | } |
| 318 | |
| 319 | for (k = 0, j = 0; k < MSM_PM_MODE_ATTR_NR; k++) { |
| 320 | if ((k == MSM_PM_MODE_ATTR_IDLE) && |
| 321 | !msm_pm_modes[idx].idle_supported) |
| 322 | continue; |
| 323 | if ((k == MSM_PM_MODE_ATTR_SUSPEND) && |
| 324 | !msm_pm_modes[idx].suspend_supported) |
| 325 | continue; |
| 326 | mode->kas[j].cpu = cpu; |
| 327 | mode->kas[j].ka.attr.mode = 0644; |
| 328 | mode->kas[j].ka.show = msm_pm_mode_attr_show; |
| 329 | mode->kas[j].ka.store = msm_pm_mode_attr_store; |
| 330 | mode->kas[j].ka.attr.name = msm_pm_mode_attr_labels[k]; |
| 331 | mode->attrs[j] = &mode->kas[j].ka.attr; |
| 332 | j++; |
| 333 | } |
| 334 | mode->attrs[j] = NULL; |
| 335 | |
| 336 | mode->attr_group.attrs = mode->attrs; |
| 337 | ret = sysfs_create_group(mode->kobj, &mode->attr_group); |
| 338 | if (ret) { |
| 339 | printk(KERN_ERR |
| 340 | "%s: cannot create kobject attribute group\n", |
| 341 | __func__); |
| 342 | goto mode_sysfs_add_cpu_exit; |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | ret = 0; |
| 347 | |
| 348 | mode_sysfs_add_cpu_exit: |
| 349 | if (ret) { |
| 350 | if (mode && mode->kobj) |
| 351 | kobject_del(mode->kobj); |
| 352 | kfree(mode); |
| 353 | } |
| 354 | |
| 355 | return ret; |
| 356 | } |
| 357 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 358 | /* |
| 359 | * Add sysfs entries for the sleep modes. |
| 360 | */ |
| 361 | static int __init msm_pm_mode_sysfs_add(void) |
| 362 | { |
| 363 | struct kobject *module_kobj = NULL; |
| 364 | struct kobject *modes_kobj = NULL; |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 365 | unsigned int cpu; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 366 | int ret; |
| 367 | |
| 368 | module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME); |
| 369 | if (!module_kobj) { |
| 370 | printk(KERN_ERR "%s: cannot find kobject for module %s\n", |
| 371 | __func__, KBUILD_MODNAME); |
| 372 | ret = -ENOENT; |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 373 | goto mode_sysfs_add_exit; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 374 | } |
| 375 | |
| 376 | modes_kobj = kobject_create_and_add("modes", module_kobj); |
| 377 | if (!modes_kobj) { |
| 378 | printk(KERN_ERR "%s: cannot create modes kobject\n", __func__); |
| 379 | ret = -ENOMEM; |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 380 | goto mode_sysfs_add_exit; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 381 | } |
| 382 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 383 | for_each_possible_cpu(cpu) { |
| 384 | ret = msm_pm_mode_sysfs_add_cpu(cpu, modes_kobj); |
| 385 | if (ret) |
| 386 | goto mode_sysfs_add_exit; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 387 | } |
| 388 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 389 | ret = 0; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 390 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 391 | mode_sysfs_add_exit: |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 392 | return ret; |
| 393 | } |
| 394 | |
| 395 | void __init msm_pm_set_platform_data( |
| 396 | struct msm_pm_platform_data *data, int count) |
| 397 | { |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 398 | BUG_ON(MSM_PM_SLEEP_MODE_NR * num_possible_cpus() > count); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 399 | msm_pm_modes = data; |
| 400 | } |
| 401 | |
Murali Nalajala | 2a0bbda | 2012-03-28 12:12:54 +0530 | [diff] [blame^] | 402 | void __init msm_pm_set_irq_extns(struct msm_pm_irq_calls *irq_calls) |
| 403 | { |
| 404 | /* sanity check */ |
| 405 | BUG_ON(irq_calls == NULL || irq_calls->irq_pending == NULL || |
| 406 | irq_calls->idle_sleep_allowed == NULL || |
| 407 | irq_calls->enter_sleep1 == NULL || |
| 408 | irq_calls->enter_sleep2 == NULL || |
| 409 | irq_calls->exit_sleep1 == NULL || |
| 410 | irq_calls->exit_sleep2 == NULL || |
| 411 | irq_calls->exit_sleep3 == NULL); |
| 412 | |
| 413 | msm_pm_irq_extns = irq_calls; |
| 414 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 415 | |
| 416 | /****************************************************************************** |
| 417 | * Sleep Limitations |
| 418 | *****************************************************************************/ |
| 419 | enum { |
| 420 | SLEEP_LIMIT_NONE = 0, |
| 421 | SLEEP_LIMIT_NO_TCXO_SHUTDOWN = 2, |
| 422 | SLEEP_LIMIT_MASK = 0x03, |
| 423 | }; |
| 424 | |
| 425 | #ifdef CONFIG_MSM_MEMORY_LOW_POWER_MODE |
| 426 | enum { |
| 427 | SLEEP_RESOURCE_MEMORY_BIT0 = 0x0200, |
| 428 | SLEEP_RESOURCE_MEMORY_BIT1 = 0x0010, |
| 429 | }; |
| 430 | #endif |
| 431 | |
| 432 | |
| 433 | /****************************************************************************** |
| 434 | * Configure Hardware for Power Down/Up |
| 435 | *****************************************************************************/ |
| 436 | |
| 437 | #if defined(CONFIG_ARCH_MSM7X30) |
Taniya Das | 298de8c | 2012-02-16 11:45:31 +0530 | [diff] [blame] | 438 | #define APPS_CLK_SLEEP_EN (MSM_APCS_GCC_BASE + 0x020) |
| 439 | #define APPS_PWRDOWN (MSM_ACC0_BASE + 0x01c) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 440 | #define APPS_SECOP (MSM_TCSR_BASE + 0x038) |
| 441 | #else /* defined(CONFIG_ARCH_MSM7X30) */ |
| 442 | #define APPS_CLK_SLEEP_EN (MSM_CSR_BASE + 0x11c) |
| 443 | #define APPS_PWRDOWN (MSM_CSR_BASE + 0x440) |
| 444 | #define APPS_STANDBY_CTL (MSM_CSR_BASE + 0x108) |
| 445 | #endif /* defined(CONFIG_ARCH_MSM7X30) */ |
| 446 | |
| 447 | /* |
| 448 | * Configure hardware registers in preparation for Apps power down. |
| 449 | */ |
| 450 | static void msm_pm_config_hw_before_power_down(void) |
| 451 | { |
| 452 | #if defined(CONFIG_ARCH_MSM7X30) |
| 453 | __raw_writel(1, APPS_PWRDOWN); |
| 454 | mb(); |
| 455 | __raw_writel(4, APPS_SECOP); |
| 456 | mb(); |
| 457 | #elif defined(CONFIG_ARCH_MSM7X27) |
| 458 | __raw_writel(0x1f, APPS_CLK_SLEEP_EN); |
| 459 | mb(); |
| 460 | __raw_writel(1, APPS_PWRDOWN); |
| 461 | mb(); |
| 462 | #elif defined(CONFIG_ARCH_MSM7x27A) |
| 463 | __raw_writel(0x7, APPS_CLK_SLEEP_EN); |
| 464 | mb(); |
| 465 | __raw_writel(1, APPS_PWRDOWN); |
| 466 | mb(); |
| 467 | #else |
| 468 | __raw_writel(0x1f, APPS_CLK_SLEEP_EN); |
| 469 | mb(); |
| 470 | __raw_writel(1, APPS_PWRDOWN); |
| 471 | mb(); |
| 472 | __raw_writel(0, APPS_STANDBY_CTL); |
| 473 | mb(); |
| 474 | #endif |
| 475 | } |
| 476 | |
| 477 | /* |
| 478 | * Clear hardware registers after Apps powers up. |
| 479 | */ |
| 480 | static void msm_pm_config_hw_after_power_up(void) |
| 481 | { |
| 482 | #if defined(CONFIG_ARCH_MSM7X30) |
| 483 | __raw_writel(0, APPS_SECOP); |
| 484 | mb(); |
| 485 | __raw_writel(0, APPS_PWRDOWN); |
| 486 | mb(); |
| 487 | msm_spm_reinit(); |
| 488 | #elif defined(CONFIG_ARCH_MSM7x27A) |
| 489 | __raw_writel(0, APPS_PWRDOWN); |
| 490 | mb(); |
| 491 | __raw_writel(0, APPS_CLK_SLEEP_EN); |
| 492 | mb(); |
| 493 | #else |
| 494 | __raw_writel(0, APPS_PWRDOWN); |
| 495 | mb(); |
| 496 | __raw_writel(0, APPS_CLK_SLEEP_EN); |
| 497 | mb(); |
| 498 | #endif |
| 499 | } |
| 500 | |
| 501 | /* |
| 502 | * Configure hardware registers in preparation for SWFI. |
| 503 | */ |
| 504 | static void msm_pm_config_hw_before_swfi(void) |
| 505 | { |
| 506 | #if defined(CONFIG_ARCH_QSD8X50) |
| 507 | __raw_writel(0x1f, APPS_CLK_SLEEP_EN); |
| 508 | mb(); |
| 509 | #elif defined(CONFIG_ARCH_MSM7X27) |
| 510 | __raw_writel(0x0f, APPS_CLK_SLEEP_EN); |
| 511 | mb(); |
| 512 | #elif defined(CONFIG_ARCH_MSM7X27A) |
| 513 | __raw_writel(0x7, APPS_CLK_SLEEP_EN); |
| 514 | mb(); |
| 515 | #endif |
| 516 | } |
| 517 | |
| 518 | /* |
| 519 | * Respond to timing out waiting for Modem |
| 520 | * |
| 521 | * NOTE: The function never returns. |
| 522 | */ |
| 523 | static void msm_pm_timeout(void) |
| 524 | { |
| 525 | #if defined(CONFIG_MSM_PM_TIMEOUT_RESET_CHIP) |
| 526 | printk(KERN_EMERG "%s(): resetting chip\n", __func__); |
| 527 | msm_proc_comm(PCOM_RESET_CHIP_IMM, NULL, NULL); |
| 528 | #elif defined(CONFIG_MSM_PM_TIMEOUT_RESET_MODEM) |
| 529 | printk(KERN_EMERG "%s(): resetting modem\n", __func__); |
| 530 | msm_proc_comm_reset_modem_now(); |
| 531 | #elif defined(CONFIG_MSM_PM_TIMEOUT_HALT) |
| 532 | printk(KERN_EMERG "%s(): halting\n", __func__); |
| 533 | #endif |
| 534 | for (;;) |
| 535 | ; |
| 536 | } |
| 537 | |
| 538 | |
| 539 | /****************************************************************************** |
| 540 | * State Polling Definitions |
| 541 | *****************************************************************************/ |
| 542 | |
| 543 | struct msm_pm_polled_group { |
| 544 | uint32_t group_id; |
| 545 | |
| 546 | uint32_t bits_all_set; |
| 547 | uint32_t bits_all_clear; |
| 548 | uint32_t bits_any_set; |
| 549 | uint32_t bits_any_clear; |
| 550 | |
| 551 | uint32_t value_read; |
| 552 | }; |
| 553 | |
| 554 | /* |
| 555 | * Return true if all bits indicated by flag are set in source. |
| 556 | */ |
| 557 | static inline bool msm_pm_all_set(uint32_t source, uint32_t flag) |
| 558 | { |
| 559 | return (source & flag) == flag; |
| 560 | } |
| 561 | |
| 562 | /* |
| 563 | * Return true if any bit indicated by flag are set in source. |
| 564 | */ |
| 565 | static inline bool msm_pm_any_set(uint32_t source, uint32_t flag) |
| 566 | { |
| 567 | return !flag || (source & flag); |
| 568 | } |
| 569 | |
| 570 | /* |
| 571 | * Return true if all bits indicated by flag are cleared in source. |
| 572 | */ |
| 573 | static inline bool msm_pm_all_clear(uint32_t source, uint32_t flag) |
| 574 | { |
| 575 | return (~source & flag) == flag; |
| 576 | } |
| 577 | |
| 578 | /* |
| 579 | * Return true if any bit indicated by flag are cleared in source. |
| 580 | */ |
| 581 | static inline bool msm_pm_any_clear(uint32_t source, uint32_t flag) |
| 582 | { |
| 583 | return !flag || (~source & flag); |
| 584 | } |
| 585 | |
| 586 | /* |
| 587 | * Poll the shared memory states as indicated by the poll groups. |
| 588 | * |
| 589 | * nr_grps: number of groups in the array |
| 590 | * grps: array of groups |
| 591 | * |
| 592 | * The function returns when conditions specified by any of the poll |
| 593 | * groups become true. The conditions specified by a poll group are |
| 594 | * deemed true when 1) at least one bit from bits_any_set is set OR one |
| 595 | * bit from bits_any_clear is cleared; and 2) all bits in bits_all_set |
| 596 | * are set; and 3) all bits in bits_all_clear are cleared. |
| 597 | * |
| 598 | * Return value: |
| 599 | * >=0: index of the poll group whose conditions have become true |
| 600 | * -ETIMEDOUT: timed out |
| 601 | */ |
| 602 | static int msm_pm_poll_state(int nr_grps, struct msm_pm_polled_group *grps) |
| 603 | { |
| 604 | int i, k; |
| 605 | |
| 606 | for (i = 0; i < 50000; i++) { |
| 607 | for (k = 0; k < nr_grps; k++) { |
| 608 | bool all_set, all_clear; |
| 609 | bool any_set, any_clear; |
| 610 | |
| 611 | grps[k].value_read = smsm_get_state(grps[k].group_id); |
| 612 | |
| 613 | all_set = msm_pm_all_set(grps[k].value_read, |
| 614 | grps[k].bits_all_set); |
| 615 | all_clear = msm_pm_all_clear(grps[k].value_read, |
| 616 | grps[k].bits_all_clear); |
| 617 | any_set = msm_pm_any_set(grps[k].value_read, |
| 618 | grps[k].bits_any_set); |
| 619 | any_clear = msm_pm_any_clear(grps[k].value_read, |
| 620 | grps[k].bits_any_clear); |
| 621 | |
| 622 | if (all_set && all_clear && (any_set || any_clear)) |
| 623 | return k; |
| 624 | } |
| 625 | udelay(50); |
| 626 | } |
| 627 | |
| 628 | printk(KERN_ERR "%s failed:\n", __func__); |
| 629 | for (k = 0; k < nr_grps; k++) |
| 630 | printk(KERN_ERR "(%x, %x, %x, %x) %x\n", |
| 631 | grps[k].bits_all_set, grps[k].bits_all_clear, |
| 632 | grps[k].bits_any_set, grps[k].bits_any_clear, |
| 633 | grps[k].value_read); |
| 634 | |
| 635 | return -ETIMEDOUT; |
| 636 | } |
| 637 | |
| 638 | |
| 639 | /****************************************************************************** |
| 640 | * Suspend Max Sleep Time |
| 641 | *****************************************************************************/ |
| 642 | |
| 643 | #define SCLK_HZ (32768) |
| 644 | #define MSM_PM_SLEEP_TICK_LIMIT (0x6DDD000) |
| 645 | |
| 646 | #ifdef CONFIG_MSM_SLEEP_TIME_OVERRIDE |
| 647 | static int msm_pm_sleep_time_override; |
| 648 | module_param_named(sleep_time_override, |
| 649 | msm_pm_sleep_time_override, int, S_IRUGO | S_IWUSR | S_IWGRP); |
| 650 | #endif |
| 651 | |
| 652 | static uint32_t msm_pm_max_sleep_time; |
| 653 | |
| 654 | /* |
| 655 | * Convert time from nanoseconds to slow clock ticks, then cap it to the |
| 656 | * specified limit |
| 657 | */ |
| 658 | static int64_t msm_pm_convert_and_cap_time(int64_t time_ns, int64_t limit) |
| 659 | { |
| 660 | do_div(time_ns, NSEC_PER_SEC / SCLK_HZ); |
| 661 | return (time_ns > limit) ? limit : time_ns; |
| 662 | } |
| 663 | |
| 664 | /* |
| 665 | * Set the sleep time for suspend. 0 means infinite sleep time. |
| 666 | */ |
| 667 | void msm_pm_set_max_sleep_time(int64_t max_sleep_time_ns) |
| 668 | { |
| 669 | unsigned long flags; |
| 670 | |
| 671 | local_irq_save(flags); |
| 672 | if (max_sleep_time_ns == 0) { |
| 673 | msm_pm_max_sleep_time = 0; |
| 674 | } else { |
| 675 | msm_pm_max_sleep_time = (uint32_t)msm_pm_convert_and_cap_time( |
| 676 | max_sleep_time_ns, MSM_PM_SLEEP_TICK_LIMIT); |
| 677 | |
| 678 | if (msm_pm_max_sleep_time == 0) |
| 679 | msm_pm_max_sleep_time = 1; |
| 680 | } |
| 681 | |
| 682 | MSM_PM_DPRINTK(MSM_PM_DEBUG_SUSPEND, KERN_INFO, |
| 683 | "%s(): Requested %lld ns Giving %u sclk ticks\n", __func__, |
| 684 | max_sleep_time_ns, msm_pm_max_sleep_time); |
| 685 | local_irq_restore(flags); |
| 686 | } |
| 687 | EXPORT_SYMBOL(msm_pm_set_max_sleep_time); |
| 688 | |
| 689 | |
| 690 | /****************************************************************************** |
| 691 | * CONFIG_MSM_IDLE_STATS |
| 692 | *****************************************************************************/ |
| 693 | |
| 694 | #ifdef CONFIG_MSM_IDLE_STATS |
| 695 | enum msm_pm_time_stats_id { |
| 696 | MSM_PM_STAT_REQUESTED_IDLE, |
| 697 | MSM_PM_STAT_IDLE_SPIN, |
| 698 | MSM_PM_STAT_IDLE_WFI, |
| 699 | MSM_PM_STAT_IDLE_STANDALONE_POWER_COLLAPSE, |
| 700 | MSM_PM_STAT_IDLE_FAILED_STANDALONE_POWER_COLLAPSE, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 701 | MSM_PM_STAT_IDLE_POWER_COLLAPSE, |
| 702 | MSM_PM_STAT_IDLE_FAILED_POWER_COLLAPSE, |
| 703 | MSM_PM_STAT_SUSPEND, |
| 704 | MSM_PM_STAT_FAILED_SUSPEND, |
| 705 | MSM_PM_STAT_NOT_IDLE, |
| 706 | MSM_PM_STAT_COUNT |
| 707 | }; |
| 708 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 709 | struct msm_pm_time_stats { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 710 | const char *name; |
| 711 | int64_t first_bucket_time; |
| 712 | int bucket[CONFIG_MSM_IDLE_STATS_BUCKET_COUNT]; |
| 713 | int64_t min_time[CONFIG_MSM_IDLE_STATS_BUCKET_COUNT]; |
| 714 | int64_t max_time[CONFIG_MSM_IDLE_STATS_BUCKET_COUNT]; |
| 715 | int count; |
| 716 | int64_t total_time; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 717 | }; |
| 718 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 719 | struct msm_pm_cpu_time_stats { |
| 720 | struct msm_pm_time_stats stats[MSM_PM_STAT_COUNT]; |
| 721 | }; |
| 722 | |
| 723 | static DEFINE_PER_CPU_SHARED_ALIGNED( |
| 724 | struct msm_pm_cpu_time_stats, msm_pm_stats); |
| 725 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 726 | static uint32_t msm_pm_sleep_limit = SLEEP_LIMIT_NONE; |
| 727 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 728 | static DEFINE_SPINLOCK(msm_pm_stats_lock); |
| 729 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 730 | /* |
| 731 | * Add the given time data to the statistics collection. |
| 732 | */ |
| 733 | static void msm_pm_add_stat(enum msm_pm_time_stats_id id, int64_t t) |
| 734 | { |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 735 | unsigned long flags; |
| 736 | struct msm_pm_time_stats *stats; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 737 | int i; |
| 738 | int64_t bt; |
| 739 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 740 | spin_lock_irqsave(&msm_pm_stats_lock, flags); |
| 741 | stats = __get_cpu_var(msm_pm_stats).stats; |
| 742 | |
| 743 | stats[id].total_time += t; |
| 744 | stats[id].count++; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 745 | |
| 746 | bt = t; |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 747 | do_div(bt, stats[id].first_bucket_time); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 748 | |
| 749 | if (bt < 1ULL << (CONFIG_MSM_IDLE_STATS_BUCKET_SHIFT * |
| 750 | (CONFIG_MSM_IDLE_STATS_BUCKET_COUNT - 1))) |
| 751 | i = DIV_ROUND_UP(fls((uint32_t)bt), |
| 752 | CONFIG_MSM_IDLE_STATS_BUCKET_SHIFT); |
| 753 | else |
| 754 | i = CONFIG_MSM_IDLE_STATS_BUCKET_COUNT - 1; |
| 755 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 756 | if (i >= CONFIG_MSM_IDLE_STATS_BUCKET_COUNT) |
| 757 | i = CONFIG_MSM_IDLE_STATS_BUCKET_COUNT - 1; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 758 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 759 | stats[id].bucket[i]++; |
| 760 | |
| 761 | if (t < stats[id].min_time[i] || !stats[id].max_time[i]) |
| 762 | stats[id].min_time[i] = t; |
| 763 | if (t > stats[id].max_time[i]) |
| 764 | stats[id].max_time[i] = t; |
| 765 | |
| 766 | spin_unlock_irqrestore(&msm_pm_stats_lock, flags); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 767 | } |
| 768 | |
| 769 | /* |
| 770 | * Helper function of snprintf where buf is auto-incremented, size is auto- |
| 771 | * decremented, and there is no return value. |
| 772 | * |
| 773 | * NOTE: buf and size must be l-values (e.g. variables) |
| 774 | */ |
| 775 | #define SNPRINTF(buf, size, format, ...) \ |
| 776 | do { \ |
| 777 | if (size > 0) { \ |
| 778 | int ret; \ |
| 779 | ret = snprintf(buf, size, format, ## __VA_ARGS__); \ |
| 780 | if (ret > size) { \ |
| 781 | buf += size; \ |
| 782 | size = 0; \ |
| 783 | } else { \ |
| 784 | buf += ret; \ |
| 785 | size -= ret; \ |
| 786 | } \ |
| 787 | } \ |
| 788 | } while (0) |
| 789 | |
| 790 | /* |
| 791 | * Write out the power management statistics. |
| 792 | */ |
| 793 | static int msm_pm_read_proc |
| 794 | (char *page, char **start, off_t off, int count, int *eof, void *data) |
| 795 | { |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 796 | unsigned int cpu = off / MSM_PM_STAT_COUNT; |
| 797 | int id = off % MSM_PM_STAT_COUNT; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 798 | char *p = page; |
| 799 | |
| 800 | if (count < 1024) { |
| 801 | *start = (char *) 0; |
| 802 | *eof = 0; |
| 803 | return 0; |
| 804 | } |
| 805 | |
| 806 | if (!off) { |
| 807 | SNPRINTF(p, count, "Last power collapse voted "); |
| 808 | if ((msm_pm_sleep_limit & SLEEP_LIMIT_MASK) == |
| 809 | SLEEP_LIMIT_NONE) |
| 810 | SNPRINTF(p, count, "for TCXO shutdown\n\n"); |
| 811 | else |
| 812 | SNPRINTF(p, count, "against TCXO shutdown\n\n"); |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 813 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 814 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 815 | if (cpu < num_possible_cpus()) { |
| 816 | unsigned long flags; |
| 817 | struct msm_pm_time_stats *stats; |
| 818 | int i; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 819 | int64_t bucket_time; |
| 820 | int64_t s; |
| 821 | uint32_t ns; |
| 822 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 823 | spin_lock_irqsave(&msm_pm_stats_lock, flags); |
| 824 | stats = per_cpu(msm_pm_stats, cpu).stats; |
| 825 | |
| 826 | s = stats[id].total_time; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 827 | ns = do_div(s, NSEC_PER_SEC); |
| 828 | SNPRINTF(p, count, |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 829 | "[cpu %u] %s:\n" |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 830 | " count: %7d\n" |
| 831 | " total_time: %lld.%09u\n", |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 832 | cpu, stats[id].name, |
| 833 | stats[id].count, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 834 | s, ns); |
| 835 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 836 | bucket_time = stats[id].first_bucket_time; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 837 | for (i = 0; i < CONFIG_MSM_IDLE_STATS_BUCKET_COUNT - 1; i++) { |
| 838 | s = bucket_time; |
| 839 | ns = do_div(s, NSEC_PER_SEC); |
| 840 | SNPRINTF(p, count, |
| 841 | " <%6lld.%09u: %7d (%lld-%lld)\n", |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 842 | s, ns, stats[id].bucket[i], |
| 843 | stats[id].min_time[i], |
| 844 | stats[id].max_time[i]); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 845 | |
| 846 | bucket_time <<= CONFIG_MSM_IDLE_STATS_BUCKET_SHIFT; |
| 847 | } |
| 848 | |
| 849 | SNPRINTF(p, count, " >=%6lld.%09u: %7d (%lld-%lld)\n", |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 850 | s, ns, stats[id].bucket[i], |
| 851 | stats[id].min_time[i], |
| 852 | stats[id].max_time[i]); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 853 | |
| 854 | *start = (char *) 1; |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 855 | *eof = (off + 1 >= MSM_PM_STAT_COUNT * num_possible_cpus()); |
| 856 | |
| 857 | spin_unlock_irqrestore(&msm_pm_stats_lock, flags); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 858 | } |
| 859 | |
| 860 | return p - page; |
| 861 | } |
| 862 | #undef SNPRINTF |
| 863 | |
| 864 | #define MSM_PM_STATS_RESET "reset" |
| 865 | |
| 866 | /* |
| 867 | * Reset the power management statistics values. |
| 868 | */ |
| 869 | static int msm_pm_write_proc(struct file *file, const char __user *buffer, |
| 870 | unsigned long count, void *data) |
| 871 | { |
| 872 | char buf[sizeof(MSM_PM_STATS_RESET)]; |
| 873 | int ret; |
| 874 | unsigned long flags; |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 875 | unsigned int cpu; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 876 | |
| 877 | if (count < strlen(MSM_PM_STATS_RESET)) { |
| 878 | ret = -EINVAL; |
| 879 | goto write_proc_failed; |
| 880 | } |
| 881 | |
| 882 | if (copy_from_user(buf, buffer, strlen(MSM_PM_STATS_RESET))) { |
| 883 | ret = -EFAULT; |
| 884 | goto write_proc_failed; |
| 885 | } |
| 886 | |
| 887 | if (memcmp(buf, MSM_PM_STATS_RESET, strlen(MSM_PM_STATS_RESET))) { |
| 888 | ret = -EINVAL; |
| 889 | goto write_proc_failed; |
| 890 | } |
| 891 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 892 | spin_lock_irqsave(&msm_pm_stats_lock, flags); |
| 893 | for_each_possible_cpu(cpu) { |
| 894 | struct msm_pm_time_stats *stats; |
| 895 | int i; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 896 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 897 | stats = per_cpu(msm_pm_stats, cpu).stats; |
| 898 | for (i = 0; i < MSM_PM_STAT_COUNT; i++) { |
| 899 | memset(stats[i].bucket, |
| 900 | 0, sizeof(stats[i].bucket)); |
| 901 | memset(stats[i].min_time, |
| 902 | 0, sizeof(stats[i].min_time)); |
| 903 | memset(stats[i].max_time, |
| 904 | 0, sizeof(stats[i].max_time)); |
| 905 | stats[i].count = 0; |
| 906 | stats[i].total_time = 0; |
| 907 | } |
| 908 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 909 | msm_pm_sleep_limit = SLEEP_LIMIT_NONE; |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 910 | spin_unlock_irqrestore(&msm_pm_stats_lock, flags); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 911 | |
| 912 | return count; |
| 913 | |
| 914 | write_proc_failed: |
| 915 | return ret; |
| 916 | } |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 917 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 918 | #undef MSM_PM_STATS_RESET |
| 919 | #endif /* CONFIG_MSM_IDLE_STATS */ |
| 920 | |
| 921 | |
| 922 | /****************************************************************************** |
| 923 | * Shared Memory Bits |
| 924 | *****************************************************************************/ |
| 925 | |
| 926 | #define DEM_MASTER_BITS_PER_CPU 6 |
| 927 | |
| 928 | /* Power Master State Bits - Per CPU */ |
| 929 | #define DEM_MASTER_SMSM_RUN \ |
| 930 | (0x01UL << (DEM_MASTER_BITS_PER_CPU * SMSM_APPS_STATE)) |
| 931 | #define DEM_MASTER_SMSM_RSA \ |
| 932 | (0x02UL << (DEM_MASTER_BITS_PER_CPU * SMSM_APPS_STATE)) |
| 933 | #define DEM_MASTER_SMSM_PWRC_EARLY_EXIT \ |
| 934 | (0x04UL << (DEM_MASTER_BITS_PER_CPU * SMSM_APPS_STATE)) |
| 935 | #define DEM_MASTER_SMSM_SLEEP_EXIT \ |
| 936 | (0x08UL << (DEM_MASTER_BITS_PER_CPU * SMSM_APPS_STATE)) |
| 937 | #define DEM_MASTER_SMSM_READY \ |
| 938 | (0x10UL << (DEM_MASTER_BITS_PER_CPU * SMSM_APPS_STATE)) |
| 939 | #define DEM_MASTER_SMSM_SLEEP \ |
| 940 | (0x20UL << (DEM_MASTER_BITS_PER_CPU * SMSM_APPS_STATE)) |
| 941 | |
| 942 | /* Power Slave State Bits */ |
| 943 | #define DEM_SLAVE_SMSM_RUN (0x0001) |
| 944 | #define DEM_SLAVE_SMSM_PWRC (0x0002) |
| 945 | #define DEM_SLAVE_SMSM_PWRC_DELAY (0x0004) |
| 946 | #define DEM_SLAVE_SMSM_PWRC_EARLY_EXIT (0x0008) |
| 947 | #define DEM_SLAVE_SMSM_WFPI (0x0010) |
| 948 | #define DEM_SLAVE_SMSM_SLEEP (0x0020) |
| 949 | #define DEM_SLAVE_SMSM_SLEEP_EXIT (0x0040) |
| 950 | #define DEM_SLAVE_SMSM_MSGS_REDUCED (0x0080) |
| 951 | #define DEM_SLAVE_SMSM_RESET (0x0100) |
| 952 | #define DEM_SLAVE_SMSM_PWRC_SUSPEND (0x0200) |
| 953 | |
| 954 | |
| 955 | /****************************************************************************** |
| 956 | * Shared Memory Data |
| 957 | *****************************************************************************/ |
| 958 | |
| 959 | #define DEM_MAX_PORT_NAME_LEN (20) |
| 960 | |
| 961 | struct msm_pm_smem_t { |
| 962 | uint32_t sleep_time; |
| 963 | uint32_t irq_mask; |
| 964 | uint32_t resources_used; |
| 965 | uint32_t reserved1; |
| 966 | |
| 967 | uint32_t wakeup_reason; |
| 968 | uint32_t pending_irqs; |
| 969 | uint32_t rpc_prog; |
| 970 | uint32_t rpc_proc; |
| 971 | char smd_port_name[DEM_MAX_PORT_NAME_LEN]; |
| 972 | uint32_t reserved2; |
| 973 | }; |
| 974 | |
| 975 | |
| 976 | /****************************************************************************** |
| 977 | * |
| 978 | *****************************************************************************/ |
| 979 | static struct msm_pm_smem_t *msm_pm_smem_data; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 980 | static atomic_t msm_pm_init_done = ATOMIC_INIT(0); |
| 981 | |
| 982 | static int msm_pm_modem_busy(void) |
| 983 | { |
| 984 | if (!(smsm_get_state(SMSM_POWER_MASTER_DEM) & DEM_MASTER_SMSM_READY)) { |
| 985 | MSM_PM_DPRINTK(MSM_PM_DEBUG_POWER_COLLAPSE, |
| 986 | KERN_INFO, "%s(): master not ready\n", __func__); |
| 987 | return -EBUSY; |
| 988 | } |
| 989 | |
| 990 | return 0; |
| 991 | } |
| 992 | |
| 993 | /* |
| 994 | * Power collapse the Apps processor. This function executes the handshake |
| 995 | * protocol with Modem. |
| 996 | * |
| 997 | * Return value: |
| 998 | * -EAGAIN: modem reset occurred or early exit from power collapse |
| 999 | * -EBUSY: modem not ready for our power collapse -- no power loss |
| 1000 | * -ETIMEDOUT: timed out waiting for modem's handshake -- no power loss |
| 1001 | * 0: success |
| 1002 | */ |
| 1003 | static int msm_pm_power_collapse |
| 1004 | (bool from_idle, uint32_t sleep_delay, uint32_t sleep_limit) |
| 1005 | { |
| 1006 | struct msm_pm_polled_group state_grps[2]; |
| 1007 | unsigned long saved_acpuclk_rate; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1008 | int collapsed = 0; |
| 1009 | int ret; |
| 1010 | |
| 1011 | MSM_PM_DPRINTK(MSM_PM_DEBUG_SUSPEND|MSM_PM_DEBUG_POWER_COLLAPSE, |
| 1012 | KERN_INFO, "%s(): idle %d, delay %u, limit %u\n", __func__, |
| 1013 | (int)from_idle, sleep_delay, sleep_limit); |
| 1014 | |
| 1015 | if (!(smsm_get_state(SMSM_POWER_MASTER_DEM) & DEM_MASTER_SMSM_READY)) { |
| 1016 | MSM_PM_DPRINTK( |
| 1017 | MSM_PM_DEBUG_SUSPEND | MSM_PM_DEBUG_POWER_COLLAPSE, |
| 1018 | KERN_INFO, "%s(): master not ready\n", __func__); |
| 1019 | ret = -EBUSY; |
| 1020 | goto power_collapse_bail; |
| 1021 | } |
| 1022 | |
| 1023 | memset(msm_pm_smem_data, 0, sizeof(*msm_pm_smem_data)); |
| 1024 | |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1025 | if (cpu_is_msm8625()) { |
| 1026 | /* Program the SPM */ |
| 1027 | ret = msm_spm_set_low_power_mode(MSM_SPM_MODE_POWER_COLLAPSE, |
| 1028 | false); |
| 1029 | WARN_ON(ret); |
| 1030 | } |
| 1031 | |
Murali Nalajala | 2a0bbda | 2012-03-28 12:12:54 +0530 | [diff] [blame^] | 1032 | msm_pm_irq_extns->enter_sleep1(true, from_idle, |
| 1033 | &msm_pm_smem_data->irq_mask); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1034 | msm_sirc_enter_sleep(); |
| 1035 | msm_gpio_enter_sleep(from_idle); |
| 1036 | |
| 1037 | msm_pm_smem_data->sleep_time = sleep_delay; |
| 1038 | msm_pm_smem_data->resources_used = sleep_limit; |
| 1039 | |
| 1040 | /* Enter PWRC/PWRC_SUSPEND */ |
| 1041 | |
| 1042 | if (from_idle) |
| 1043 | smsm_change_state(SMSM_APPS_DEM, DEM_SLAVE_SMSM_RUN, |
| 1044 | DEM_SLAVE_SMSM_PWRC); |
| 1045 | else |
| 1046 | smsm_change_state(SMSM_APPS_DEM, DEM_SLAVE_SMSM_RUN, |
| 1047 | DEM_SLAVE_SMSM_PWRC | DEM_SLAVE_SMSM_PWRC_SUSPEND); |
| 1048 | |
| 1049 | MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): PWRC"); |
| 1050 | MSM_PM_DEBUG_PRINT_SLEEP_INFO(); |
| 1051 | |
| 1052 | memset(state_grps, 0, sizeof(state_grps)); |
| 1053 | state_grps[0].group_id = SMSM_POWER_MASTER_DEM; |
| 1054 | state_grps[0].bits_all_set = DEM_MASTER_SMSM_RSA; |
| 1055 | state_grps[1].group_id = SMSM_MODEM_STATE; |
| 1056 | state_grps[1].bits_all_set = SMSM_RESET; |
| 1057 | |
| 1058 | ret = msm_pm_poll_state(ARRAY_SIZE(state_grps), state_grps); |
| 1059 | |
| 1060 | if (ret < 0) { |
| 1061 | printk(KERN_EMERG "%s(): power collapse entry " |
| 1062 | "timed out waiting for Modem's response\n", __func__); |
| 1063 | msm_pm_timeout(); |
| 1064 | } |
| 1065 | |
| 1066 | if (ret == 1) { |
| 1067 | MSM_PM_DPRINTK( |
| 1068 | MSM_PM_DEBUG_SUSPEND|MSM_PM_DEBUG_POWER_COLLAPSE, |
| 1069 | KERN_INFO, |
| 1070 | "%s(): msm_pm_poll_state detected Modem reset\n", |
| 1071 | __func__); |
| 1072 | goto power_collapse_early_exit; |
| 1073 | } |
| 1074 | |
| 1075 | /* DEM Master in RSA */ |
| 1076 | |
| 1077 | MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): PWRC RSA"); |
| 1078 | |
Murali Nalajala | 2a0bbda | 2012-03-28 12:12:54 +0530 | [diff] [blame^] | 1079 | ret = msm_pm_irq_extns->enter_sleep2(true, from_idle); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1080 | if (ret < 0) { |
| 1081 | MSM_PM_DPRINTK( |
| 1082 | MSM_PM_DEBUG_SUSPEND|MSM_PM_DEBUG_POWER_COLLAPSE, |
| 1083 | KERN_INFO, |
| 1084 | "%s(): msm_irq_enter_sleep2 aborted, %d\n", __func__, |
| 1085 | ret); |
| 1086 | goto power_collapse_early_exit; |
| 1087 | } |
| 1088 | |
| 1089 | msm_pm_config_hw_before_power_down(); |
| 1090 | MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): pre power down"); |
| 1091 | |
| 1092 | saved_acpuclk_rate = acpuclk_power_collapse(); |
| 1093 | MSM_PM_DPRINTK(MSM_PM_DEBUG_CLOCK, KERN_INFO, |
| 1094 | "%s(): change clock rate (old rate = %lu)\n", __func__, |
| 1095 | saved_acpuclk_rate); |
| 1096 | |
| 1097 | if (saved_acpuclk_rate == 0) { |
| 1098 | msm_pm_config_hw_after_power_up(); |
| 1099 | goto power_collapse_early_exit; |
| 1100 | } |
| 1101 | |
Maheshkumar Sivasubramanian | 8ccc16e | 2011-10-25 15:59:57 -0600 | [diff] [blame] | 1102 | msm_pm_boot_config_before_pc(smp_processor_id(), |
| 1103 | virt_to_phys(msm_pm_collapse_exit)); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1104 | |
| 1105 | #ifdef CONFIG_VFP |
| 1106 | if (from_idle) |
| 1107 | vfp_flush_context(); |
| 1108 | #endif |
| 1109 | |
| 1110 | #ifdef CONFIG_CACHE_L2X0 |
| 1111 | l2x0_suspend(); |
| 1112 | #endif |
| 1113 | |
| 1114 | collapsed = msm_pm_collapse(); |
| 1115 | |
| 1116 | #ifdef CONFIG_CACHE_L2X0 |
| 1117 | l2x0_resume(collapsed); |
| 1118 | #endif |
| 1119 | |
Maheshkumar Sivasubramanian | 8ccc16e | 2011-10-25 15:59:57 -0600 | [diff] [blame] | 1120 | msm_pm_boot_config_after_pc(smp_processor_id()); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1121 | |
| 1122 | if (collapsed) { |
| 1123 | #ifdef CONFIG_VFP |
| 1124 | if (from_idle) |
| 1125 | vfp_reinit(); |
| 1126 | #endif |
| 1127 | cpu_init(); |
| 1128 | local_fiq_enable(); |
| 1129 | } |
| 1130 | |
| 1131 | MSM_PM_DPRINTK(MSM_PM_DEBUG_SUSPEND | MSM_PM_DEBUG_POWER_COLLAPSE, |
| 1132 | KERN_INFO, |
| 1133 | "%s(): msm_pm_collapse returned %d\n", __func__, collapsed); |
| 1134 | |
| 1135 | MSM_PM_DPRINTK(MSM_PM_DEBUG_CLOCK, KERN_INFO, |
| 1136 | "%s(): restore clock rate to %lu\n", __func__, |
| 1137 | saved_acpuclk_rate); |
| 1138 | if (acpuclk_set_rate(smp_processor_id(), saved_acpuclk_rate, |
| 1139 | SETRATE_PC) < 0) |
| 1140 | printk(KERN_ERR "%s(): failed to restore clock rate(%lu)\n", |
| 1141 | __func__, saved_acpuclk_rate); |
| 1142 | |
Murali Nalajala | 2a0bbda | 2012-03-28 12:12:54 +0530 | [diff] [blame^] | 1143 | msm_pm_irq_extns->exit_sleep1(msm_pm_smem_data->irq_mask, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1144 | msm_pm_smem_data->wakeup_reason, |
| 1145 | msm_pm_smem_data->pending_irqs); |
| 1146 | |
| 1147 | msm_pm_config_hw_after_power_up(); |
| 1148 | MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): post power up"); |
| 1149 | |
| 1150 | memset(state_grps, 0, sizeof(state_grps)); |
| 1151 | state_grps[0].group_id = SMSM_POWER_MASTER_DEM; |
| 1152 | state_grps[0].bits_any_set = |
| 1153 | DEM_MASTER_SMSM_RSA | DEM_MASTER_SMSM_PWRC_EARLY_EXIT; |
| 1154 | state_grps[1].group_id = SMSM_MODEM_STATE; |
| 1155 | state_grps[1].bits_all_set = SMSM_RESET; |
| 1156 | |
| 1157 | ret = msm_pm_poll_state(ARRAY_SIZE(state_grps), state_grps); |
| 1158 | |
| 1159 | if (ret < 0) { |
| 1160 | printk(KERN_EMERG "%s(): power collapse exit " |
| 1161 | "timed out waiting for Modem's response\n", __func__); |
| 1162 | msm_pm_timeout(); |
| 1163 | } |
| 1164 | |
| 1165 | if (ret == 1) { |
| 1166 | MSM_PM_DPRINTK( |
| 1167 | MSM_PM_DEBUG_SUSPEND|MSM_PM_DEBUG_POWER_COLLAPSE, |
| 1168 | KERN_INFO, |
| 1169 | "%s(): msm_pm_poll_state detected Modem reset\n", |
| 1170 | __func__); |
| 1171 | goto power_collapse_early_exit; |
| 1172 | } |
| 1173 | |
| 1174 | /* Sanity check */ |
| 1175 | if (collapsed) { |
| 1176 | BUG_ON(!(state_grps[0].value_read & DEM_MASTER_SMSM_RSA)); |
| 1177 | } else { |
| 1178 | BUG_ON(!(state_grps[0].value_read & |
| 1179 | DEM_MASTER_SMSM_PWRC_EARLY_EXIT)); |
| 1180 | goto power_collapse_early_exit; |
| 1181 | } |
| 1182 | |
| 1183 | /* Enter WFPI */ |
| 1184 | |
| 1185 | smsm_change_state(SMSM_APPS_DEM, |
| 1186 | DEM_SLAVE_SMSM_PWRC | DEM_SLAVE_SMSM_PWRC_SUSPEND, |
| 1187 | DEM_SLAVE_SMSM_WFPI); |
| 1188 | |
| 1189 | MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): WFPI"); |
| 1190 | |
| 1191 | memset(state_grps, 0, sizeof(state_grps)); |
| 1192 | state_grps[0].group_id = SMSM_POWER_MASTER_DEM; |
| 1193 | state_grps[0].bits_all_set = DEM_MASTER_SMSM_RUN; |
| 1194 | state_grps[1].group_id = SMSM_MODEM_STATE; |
| 1195 | state_grps[1].bits_all_set = SMSM_RESET; |
| 1196 | |
| 1197 | ret = msm_pm_poll_state(ARRAY_SIZE(state_grps), state_grps); |
| 1198 | |
| 1199 | if (ret < 0) { |
| 1200 | printk(KERN_EMERG "%s(): power collapse WFPI " |
| 1201 | "timed out waiting for Modem's response\n", __func__); |
| 1202 | msm_pm_timeout(); |
| 1203 | } |
| 1204 | |
| 1205 | if (ret == 1) { |
| 1206 | MSM_PM_DPRINTK( |
| 1207 | MSM_PM_DEBUG_SUSPEND|MSM_PM_DEBUG_POWER_COLLAPSE, |
| 1208 | KERN_INFO, |
| 1209 | "%s(): msm_pm_poll_state detected Modem reset\n", |
| 1210 | __func__); |
| 1211 | ret = -EAGAIN; |
| 1212 | goto power_collapse_restore_gpio_bail; |
| 1213 | } |
| 1214 | |
| 1215 | /* DEM Master == RUN */ |
| 1216 | |
| 1217 | MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): WFPI RUN"); |
| 1218 | MSM_PM_DEBUG_PRINT_SLEEP_INFO(); |
| 1219 | |
Murali Nalajala | 2a0bbda | 2012-03-28 12:12:54 +0530 | [diff] [blame^] | 1220 | msm_pm_irq_extns->exit_sleep2(msm_pm_smem_data->irq_mask, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1221 | msm_pm_smem_data->wakeup_reason, |
| 1222 | msm_pm_smem_data->pending_irqs); |
Murali Nalajala | 2a0bbda | 2012-03-28 12:12:54 +0530 | [diff] [blame^] | 1223 | msm_pm_irq_extns->exit_sleep3(msm_pm_smem_data->irq_mask, |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1224 | msm_pm_smem_data->wakeup_reason, |
| 1225 | msm_pm_smem_data->pending_irqs); |
| 1226 | msm_gpio_exit_sleep(); |
| 1227 | msm_sirc_exit_sleep(); |
| 1228 | |
| 1229 | smsm_change_state(SMSM_APPS_DEM, |
| 1230 | DEM_SLAVE_SMSM_WFPI, DEM_SLAVE_SMSM_RUN); |
| 1231 | |
| 1232 | MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): RUN"); |
| 1233 | |
| 1234 | smd_sleep_exit(); |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1235 | |
| 1236 | if (cpu_is_msm8625()) { |
| 1237 | ret = msm_spm_set_low_power_mode(MSM_SPM_MODE_CLOCK_GATING, |
| 1238 | false); |
| 1239 | WARN_ON(ret); |
| 1240 | } |
| 1241 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1242 | return 0; |
| 1243 | |
| 1244 | power_collapse_early_exit: |
| 1245 | /* Enter PWRC_EARLY_EXIT */ |
| 1246 | |
| 1247 | smsm_change_state(SMSM_APPS_DEM, |
| 1248 | DEM_SLAVE_SMSM_PWRC | DEM_SLAVE_SMSM_PWRC_SUSPEND, |
| 1249 | DEM_SLAVE_SMSM_PWRC_EARLY_EXIT); |
| 1250 | |
| 1251 | MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): EARLY_EXIT"); |
| 1252 | |
| 1253 | memset(state_grps, 0, sizeof(state_grps)); |
| 1254 | state_grps[0].group_id = SMSM_POWER_MASTER_DEM; |
| 1255 | state_grps[0].bits_all_set = DEM_MASTER_SMSM_PWRC_EARLY_EXIT; |
| 1256 | state_grps[1].group_id = SMSM_MODEM_STATE; |
| 1257 | state_grps[1].bits_all_set = SMSM_RESET; |
| 1258 | |
| 1259 | ret = msm_pm_poll_state(ARRAY_SIZE(state_grps), state_grps); |
| 1260 | MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): EARLY_EXIT EE"); |
| 1261 | |
| 1262 | if (ret < 0) { |
| 1263 | printk(KERN_EMERG "%s(): power collapse EARLY_EXIT " |
| 1264 | "timed out waiting for Modem's response\n", __func__); |
| 1265 | msm_pm_timeout(); |
| 1266 | } |
| 1267 | |
| 1268 | if (ret == 1) { |
| 1269 | MSM_PM_DPRINTK( |
| 1270 | MSM_PM_DEBUG_SUSPEND|MSM_PM_DEBUG_POWER_COLLAPSE, |
| 1271 | KERN_INFO, |
| 1272 | "%s(): msm_pm_poll_state detected Modem reset\n", |
| 1273 | __func__); |
| 1274 | } |
| 1275 | |
| 1276 | /* DEM Master == RESET or PWRC_EARLY_EXIT */ |
| 1277 | |
| 1278 | ret = -EAGAIN; |
| 1279 | |
| 1280 | power_collapse_restore_gpio_bail: |
| 1281 | msm_gpio_exit_sleep(); |
| 1282 | msm_sirc_exit_sleep(); |
| 1283 | |
| 1284 | /* Enter RUN */ |
| 1285 | smsm_change_state(SMSM_APPS_DEM, |
| 1286 | DEM_SLAVE_SMSM_PWRC | DEM_SLAVE_SMSM_PWRC_SUSPEND | |
| 1287 | DEM_SLAVE_SMSM_PWRC_EARLY_EXIT, DEM_SLAVE_SMSM_RUN); |
| 1288 | |
| 1289 | MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): RUN"); |
| 1290 | |
| 1291 | if (collapsed) |
| 1292 | smd_sleep_exit(); |
| 1293 | |
| 1294 | power_collapse_bail: |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1295 | if (cpu_is_msm8625()) { |
| 1296 | ret = msm_spm_set_low_power_mode(MSM_SPM_MODE_CLOCK_GATING, |
| 1297 | false); |
| 1298 | WARN_ON(ret); |
| 1299 | } |
| 1300 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1301 | return ret; |
| 1302 | } |
| 1303 | |
| 1304 | /* |
| 1305 | * Power collapse the Apps processor without involving Modem. |
| 1306 | * |
| 1307 | * Return value: |
| 1308 | * 0: success |
| 1309 | */ |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1310 | static int msm_pm_power_collapse_standalone(bool from_idle) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1311 | { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1312 | int collapsed = 0; |
| 1313 | int ret; |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1314 | void *entry; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1315 | |
| 1316 | MSM_PM_DPRINTK(MSM_PM_DEBUG_SUSPEND|MSM_PM_DEBUG_POWER_COLLAPSE, |
| 1317 | KERN_INFO, "%s()\n", __func__); |
| 1318 | |
| 1319 | ret = msm_spm_set_low_power_mode(MSM_SPM_MODE_POWER_COLLAPSE, false); |
| 1320 | WARN_ON(ret); |
| 1321 | |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1322 | entry = (!smp_processor_id() || from_idle) ? |
| 1323 | msm_pm_collapse_exit : msm_secondary_startup; |
| 1324 | |
Maheshkumar Sivasubramanian | 8ccc16e | 2011-10-25 15:59:57 -0600 | [diff] [blame] | 1325 | msm_pm_boot_config_before_pc(smp_processor_id(), |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1326 | virt_to_phys(entry)); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1327 | |
| 1328 | #ifdef CONFIG_VFP |
| 1329 | vfp_flush_context(); |
| 1330 | #endif |
| 1331 | |
| 1332 | #ifdef CONFIG_CACHE_L2X0 |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1333 | if (!cpu_is_msm8625()) |
| 1334 | l2x0_suspend(); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1335 | #endif |
| 1336 | |
| 1337 | collapsed = msm_pm_collapse(); |
| 1338 | |
| 1339 | #ifdef CONFIG_CACHE_L2X0 |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1340 | if (!cpu_is_msm8625()) |
| 1341 | l2x0_resume(collapsed); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1342 | #endif |
| 1343 | |
Maheshkumar Sivasubramanian | 8ccc16e | 2011-10-25 15:59:57 -0600 | [diff] [blame] | 1344 | msm_pm_boot_config_after_pc(smp_processor_id()); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1345 | |
| 1346 | if (collapsed) { |
| 1347 | #ifdef CONFIG_VFP |
| 1348 | vfp_reinit(); |
| 1349 | #endif |
| 1350 | cpu_init(); |
| 1351 | local_fiq_enable(); |
| 1352 | } |
| 1353 | |
| 1354 | MSM_PM_DPRINTK(MSM_PM_DEBUG_SUSPEND | MSM_PM_DEBUG_POWER_COLLAPSE, |
| 1355 | KERN_INFO, |
| 1356 | "%s(): msm_pm_collapse returned %d\n", __func__, collapsed); |
| 1357 | |
| 1358 | ret = msm_spm_set_low_power_mode(MSM_SPM_MODE_CLOCK_GATING, false); |
| 1359 | WARN_ON(ret); |
| 1360 | |
| 1361 | return 0; |
| 1362 | } |
| 1363 | |
| 1364 | /* |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1365 | * Bring the Apps processor to SWFI. |
| 1366 | * |
| 1367 | * Return value: |
| 1368 | * -EIO: could not ramp Apps processor clock |
| 1369 | * 0: success |
| 1370 | */ |
| 1371 | static int msm_pm_swfi(bool ramp_acpu) |
| 1372 | { |
| 1373 | unsigned long saved_acpuclk_rate = 0; |
| 1374 | |
| 1375 | if (ramp_acpu) { |
| 1376 | saved_acpuclk_rate = acpuclk_wait_for_irq(); |
| 1377 | MSM_PM_DPRINTK(MSM_PM_DEBUG_CLOCK, KERN_INFO, |
| 1378 | "%s(): change clock rate (old rate = %lu)\n", __func__, |
| 1379 | saved_acpuclk_rate); |
| 1380 | |
| 1381 | if (!saved_acpuclk_rate) |
| 1382 | return -EIO; |
| 1383 | } |
| 1384 | |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1385 | if (!cpu_is_msm8625()) |
| 1386 | msm_pm_config_hw_before_swfi(); |
| 1387 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1388 | msm_arch_idle(); |
| 1389 | |
| 1390 | if (ramp_acpu) { |
| 1391 | MSM_PM_DPRINTK(MSM_PM_DEBUG_CLOCK, KERN_INFO, |
| 1392 | "%s(): restore clock rate to %lu\n", __func__, |
| 1393 | saved_acpuclk_rate); |
| 1394 | if (acpuclk_set_rate(smp_processor_id(), saved_acpuclk_rate, |
| 1395 | SETRATE_SWFI) < 0) |
| 1396 | printk(KERN_ERR |
| 1397 | "%s(): failed to restore clock rate(%lu)\n", |
| 1398 | __func__, saved_acpuclk_rate); |
| 1399 | } |
| 1400 | |
| 1401 | return 0; |
| 1402 | } |
| 1403 | |
| 1404 | |
| 1405 | /****************************************************************************** |
| 1406 | * External Idle/Suspend Functions |
| 1407 | *****************************************************************************/ |
| 1408 | |
| 1409 | /* |
| 1410 | * Put CPU in low power mode. |
| 1411 | */ |
| 1412 | void arch_idle(void) |
| 1413 | { |
| 1414 | bool allow[MSM_PM_SLEEP_MODE_NR]; |
| 1415 | uint32_t sleep_limit = SLEEP_LIMIT_NONE; |
| 1416 | |
| 1417 | int latency_qos; |
| 1418 | int64_t timer_expiration; |
| 1419 | |
| 1420 | int low_power; |
| 1421 | int ret; |
| 1422 | int i; |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 1423 | unsigned int cpu; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1424 | |
| 1425 | #ifdef CONFIG_MSM_IDLE_STATS |
| 1426 | int64_t t1; |
| 1427 | static int64_t t2; |
| 1428 | int exit_stat; |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1429 | #endif |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1430 | |
| 1431 | if (!atomic_read(&msm_pm_init_done)) |
| 1432 | return; |
| 1433 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 1434 | cpu = smp_processor_id(); |
| 1435 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1436 | latency_qos = pm_qos_request(PM_QOS_CPU_DMA_LATENCY); |
| 1437 | timer_expiration = msm_timer_enter_idle(); |
| 1438 | |
| 1439 | #ifdef CONFIG_MSM_IDLE_STATS |
| 1440 | t1 = ktime_to_ns(ktime_get()); |
| 1441 | msm_pm_add_stat(MSM_PM_STAT_NOT_IDLE, t1 - t2); |
| 1442 | msm_pm_add_stat(MSM_PM_STAT_REQUESTED_IDLE, timer_expiration); |
Murali Nalajala | 7744d16 | 2012-01-13 13:06:03 +0530 | [diff] [blame] | 1443 | |
| 1444 | exit_stat = MSM_PM_STAT_IDLE_SPIN; |
| 1445 | low_power = 0; |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1446 | #endif |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1447 | |
| 1448 | for (i = 0; i < ARRAY_SIZE(allow); i++) |
| 1449 | allow[i] = true; |
| 1450 | |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1451 | if (num_online_cpus() > 1 || |
| 1452 | (timer_expiration < msm_pm_idle_sleep_min_time) || |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1453 | #ifdef CONFIG_HAS_WAKELOCK |
| 1454 | has_wake_lock(WAKE_LOCK_IDLE) || |
| 1455 | #endif |
Murali Nalajala | 2a0bbda | 2012-03-28 12:12:54 +0530 | [diff] [blame^] | 1456 | !msm_pm_irq_extns->idle_sleep_allowed()) { |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1457 | allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE] = false; |
| 1458 | allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE_NO_XO_SHUTDOWN] = false; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1459 | } |
| 1460 | |
| 1461 | for (i = 0; i < ARRAY_SIZE(allow); i++) { |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 1462 | struct msm_pm_platform_data *mode = |
| 1463 | &msm_pm_modes[MSM_PM_MODE(cpu, i)]; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1464 | if (!mode->idle_supported || !mode->idle_enabled || |
| 1465 | mode->latency >= latency_qos || |
| 1466 | mode->residency * 1000ULL >= timer_expiration) |
| 1467 | allow[i] = false; |
| 1468 | } |
| 1469 | |
| 1470 | if (allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE] || |
| 1471 | allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE_NO_XO_SHUTDOWN]) { |
| 1472 | uint32_t wait_us = CONFIG_MSM_IDLE_WAIT_ON_MODEM; |
| 1473 | while (msm_pm_modem_busy() && wait_us) { |
| 1474 | if (wait_us > 100) { |
| 1475 | udelay(100); |
| 1476 | wait_us -= 100; |
| 1477 | } else { |
| 1478 | udelay(wait_us); |
| 1479 | wait_us = 0; |
| 1480 | } |
| 1481 | } |
| 1482 | |
| 1483 | if (msm_pm_modem_busy()) { |
| 1484 | allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE] = false; |
| 1485 | allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE_NO_XO_SHUTDOWN] |
| 1486 | = false; |
| 1487 | } |
| 1488 | } |
| 1489 | |
| 1490 | MSM_PM_DPRINTK(MSM_PM_DEBUG_IDLE, KERN_INFO, |
| 1491 | "%s(): latency qos %d, next timer %lld, sleep limit %u\n", |
| 1492 | __func__, latency_qos, timer_expiration, sleep_limit); |
| 1493 | |
| 1494 | for (i = 0; i < ARRAY_SIZE(allow); i++) |
| 1495 | MSM_PM_DPRINTK(MSM_PM_DEBUG_IDLE, KERN_INFO, |
| 1496 | "%s(): allow %s: %d\n", __func__, |
| 1497 | msm_pm_sleep_mode_labels[i], (int)allow[i]); |
| 1498 | |
| 1499 | if (allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE] || |
| 1500 | allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE_NO_XO_SHUTDOWN]) { |
| 1501 | uint32_t sleep_delay; |
| 1502 | |
| 1503 | sleep_delay = (uint32_t) msm_pm_convert_and_cap_time( |
| 1504 | timer_expiration, MSM_PM_SLEEP_TICK_LIMIT); |
| 1505 | if (sleep_delay == 0) /* 0 would mean infinite time */ |
| 1506 | sleep_delay = 1; |
| 1507 | |
| 1508 | if (!allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE]) |
| 1509 | sleep_limit = SLEEP_LIMIT_NO_TCXO_SHUTDOWN; |
| 1510 | |
| 1511 | #if defined(CONFIG_MSM_MEMORY_LOW_POWER_MODE_IDLE_ACTIVE) |
| 1512 | sleep_limit |= SLEEP_RESOURCE_MEMORY_BIT1; |
| 1513 | #elif defined(CONFIG_MSM_MEMORY_LOW_POWER_MODE_IDLE_RETENTION) |
| 1514 | sleep_limit |= SLEEP_RESOURCE_MEMORY_BIT0; |
| 1515 | #endif |
| 1516 | |
| 1517 | ret = msm_pm_power_collapse(true, sleep_delay, sleep_limit); |
| 1518 | low_power = (ret != -EBUSY && ret != -ETIMEDOUT); |
| 1519 | |
| 1520 | #ifdef CONFIG_MSM_IDLE_STATS |
| 1521 | if (ret) |
| 1522 | exit_stat = MSM_PM_STAT_IDLE_FAILED_POWER_COLLAPSE; |
| 1523 | else { |
| 1524 | exit_stat = MSM_PM_STAT_IDLE_POWER_COLLAPSE; |
| 1525 | msm_pm_sleep_limit = sleep_limit; |
| 1526 | } |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1527 | #endif |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1528 | } else if (allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE]) { |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1529 | ret = msm_pm_power_collapse_standalone(true); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1530 | low_power = 0; |
| 1531 | #ifdef CONFIG_MSM_IDLE_STATS |
| 1532 | exit_stat = ret ? |
| 1533 | MSM_PM_STAT_IDLE_FAILED_STANDALONE_POWER_COLLAPSE : |
| 1534 | MSM_PM_STAT_IDLE_STANDALONE_POWER_COLLAPSE; |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1535 | #endif |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1536 | } else if (allow[MSM_PM_SLEEP_MODE_RAMP_DOWN_AND_WAIT_FOR_INTERRUPT]) { |
| 1537 | ret = msm_pm_swfi(true); |
| 1538 | if (ret) |
Murali Nalajala | 2a0bbda | 2012-03-28 12:12:54 +0530 | [diff] [blame^] | 1539 | while (!msm_pm_irq_extns->irq_pending()) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1540 | udelay(1); |
| 1541 | low_power = 0; |
| 1542 | #ifdef CONFIG_MSM_IDLE_STATS |
| 1543 | exit_stat = ret ? MSM_PM_STAT_IDLE_SPIN : MSM_PM_STAT_IDLE_WFI; |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1544 | #endif |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1545 | } else if (allow[MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT]) { |
| 1546 | msm_pm_swfi(false); |
| 1547 | low_power = 0; |
| 1548 | #ifdef CONFIG_MSM_IDLE_STATS |
| 1549 | exit_stat = MSM_PM_STAT_IDLE_WFI; |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1550 | #endif |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1551 | } else { |
Murali Nalajala | 2a0bbda | 2012-03-28 12:12:54 +0530 | [diff] [blame^] | 1552 | while (!msm_pm_irq_extns->irq_pending()) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1553 | udelay(1); |
| 1554 | low_power = 0; |
| 1555 | #ifdef CONFIG_MSM_IDLE_STATS |
| 1556 | exit_stat = MSM_PM_STAT_IDLE_SPIN; |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1557 | #endif |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1558 | } |
| 1559 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1560 | msm_timer_exit_idle(low_power); |
| 1561 | |
| 1562 | #ifdef CONFIG_MSM_IDLE_STATS |
| 1563 | t2 = ktime_to_ns(ktime_get()); |
| 1564 | msm_pm_add_stat(exit_stat, t2 - t1); |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1565 | #endif |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1566 | } |
| 1567 | |
| 1568 | /* |
| 1569 | * Suspend the Apps processor. |
| 1570 | * |
| 1571 | * Return value: |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1572 | * -EPERM: Suspend happened by a not permitted core |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1573 | * -EAGAIN: modem reset occurred or early exit from suspend |
| 1574 | * -EBUSY: modem not ready for our suspend |
| 1575 | * -EINVAL: invalid sleep mode |
| 1576 | * -EIO: could not ramp Apps processor clock |
| 1577 | * -ETIMEDOUT: timed out waiting for modem's handshake |
| 1578 | * 0: success |
| 1579 | */ |
| 1580 | static int msm_pm_enter(suspend_state_t state) |
| 1581 | { |
| 1582 | bool allow[MSM_PM_SLEEP_MODE_NR]; |
| 1583 | uint32_t sleep_limit = SLEEP_LIMIT_NONE; |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1584 | int ret = -EPERM; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1585 | int i; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1586 | #ifdef CONFIG_MSM_IDLE_STATS |
| 1587 | int64_t period = 0; |
| 1588 | int64_t time = 0; |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1589 | #endif |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1590 | |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1591 | /* Must executed by CORE0 */ |
| 1592 | if (smp_processor_id()) { |
| 1593 | __WARN(); |
| 1594 | goto suspend_exit; |
| 1595 | } |
| 1596 | |
| 1597 | #ifdef CONFIG_MSM_IDLE_STATS |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1598 | time = msm_timer_get_sclk_time(&period); |
| 1599 | #endif |
| 1600 | |
| 1601 | MSM_PM_DPRINTK(MSM_PM_DEBUG_SUSPEND, KERN_INFO, |
| 1602 | "%s(): sleep limit %u\n", __func__, sleep_limit); |
| 1603 | |
| 1604 | for (i = 0; i < ARRAY_SIZE(allow); i++) |
| 1605 | allow[i] = true; |
| 1606 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1607 | for (i = 0; i < ARRAY_SIZE(allow); i++) { |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 1608 | struct msm_pm_platform_data *mode; |
| 1609 | mode = &msm_pm_modes[MSM_PM_MODE(0, i)]; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1610 | if (!mode->suspend_supported || !mode->suspend_enabled) |
| 1611 | allow[i] = false; |
| 1612 | } |
| 1613 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1614 | if (allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE] || |
| 1615 | allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE_NO_XO_SHUTDOWN]) { |
| 1616 | #ifdef CONFIG_MSM_IDLE_STATS |
| 1617 | enum msm_pm_time_stats_id id; |
| 1618 | int64_t end_time; |
| 1619 | #endif |
| 1620 | |
| 1621 | clock_debug_print_enabled(); |
| 1622 | |
| 1623 | #ifdef CONFIG_MSM_SLEEP_TIME_OVERRIDE |
| 1624 | if (msm_pm_sleep_time_override > 0) { |
| 1625 | int64_t ns; |
| 1626 | ns = NSEC_PER_SEC * (int64_t)msm_pm_sleep_time_override; |
| 1627 | msm_pm_set_max_sleep_time(ns); |
| 1628 | msm_pm_sleep_time_override = 0; |
| 1629 | } |
| 1630 | #endif |
| 1631 | if (!allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE]) |
| 1632 | sleep_limit = SLEEP_LIMIT_NO_TCXO_SHUTDOWN; |
| 1633 | |
| 1634 | #if defined(CONFIG_MSM_MEMORY_LOW_POWER_MODE_SUSPEND_ACTIVE) |
| 1635 | sleep_limit |= SLEEP_RESOURCE_MEMORY_BIT1; |
| 1636 | #elif defined(CONFIG_MSM_MEMORY_LOW_POWER_MODE_SUSPEND_RETENTION) |
| 1637 | sleep_limit |= SLEEP_RESOURCE_MEMORY_BIT0; |
| 1638 | #elif defined(CONFIG_MSM_MEMORY_LOW_POWER_MODE_SUSPEND_DEEP_POWER_DOWN) |
| 1639 | if (get_msm_migrate_pages_status() != MEM_OFFLINE) |
| 1640 | sleep_limit |= SLEEP_RESOURCE_MEMORY_BIT0; |
| 1641 | #endif |
| 1642 | |
| 1643 | for (i = 0; i < 30 && msm_pm_modem_busy(); i++) |
| 1644 | udelay(500); |
| 1645 | |
| 1646 | ret = msm_pm_power_collapse( |
| 1647 | false, msm_pm_max_sleep_time, sleep_limit); |
| 1648 | |
| 1649 | #ifdef CONFIG_MSM_IDLE_STATS |
| 1650 | if (ret) |
| 1651 | id = MSM_PM_STAT_FAILED_SUSPEND; |
| 1652 | else { |
| 1653 | id = MSM_PM_STAT_SUSPEND; |
| 1654 | msm_pm_sleep_limit = sleep_limit; |
| 1655 | } |
| 1656 | |
| 1657 | if (time != 0) { |
| 1658 | end_time = msm_timer_get_sclk_time(NULL); |
| 1659 | if (end_time != 0) { |
| 1660 | time = end_time - time; |
| 1661 | if (time < 0) |
| 1662 | time += period; |
| 1663 | } else |
| 1664 | time = 0; |
| 1665 | } |
| 1666 | |
| 1667 | msm_pm_add_stat(id, time); |
| 1668 | #endif |
| 1669 | } else if (allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE]) { |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1670 | ret = msm_pm_power_collapse_standalone(false); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1671 | } else if (allow[MSM_PM_SLEEP_MODE_RAMP_DOWN_AND_WAIT_FOR_INTERRUPT]) { |
| 1672 | ret = msm_pm_swfi(true); |
| 1673 | if (ret) |
Murali Nalajala | 2a0bbda | 2012-03-28 12:12:54 +0530 | [diff] [blame^] | 1674 | while (!msm_pm_irq_extns->irq_pending()) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1675 | udelay(1); |
| 1676 | } else if (allow[MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT]) { |
| 1677 | msm_pm_swfi(false); |
| 1678 | } |
| 1679 | |
Murali Nalajala | 41786ab | 2012-03-06 10:47:32 +0530 | [diff] [blame] | 1680 | suspend_exit: |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1681 | MSM_PM_DPRINTK(MSM_PM_DEBUG_SUSPEND, KERN_INFO, |
| 1682 | "%s(): return %d\n", __func__, ret); |
| 1683 | |
| 1684 | return ret; |
| 1685 | } |
| 1686 | |
| 1687 | static struct platform_suspend_ops msm_pm_ops = { |
| 1688 | .enter = msm_pm_enter, |
| 1689 | .valid = suspend_valid_only_mem, |
| 1690 | }; |
| 1691 | |
Murali Nalajala | c89f2f3 | 2012-02-07 19:23:52 +0530 | [diff] [blame] | 1692 | /* Hotplug the "non boot" CPU's and put |
| 1693 | * the cores into low power mode |
| 1694 | */ |
| 1695 | void msm_pm_cpu_enter_lowpower(unsigned int cpu) |
| 1696 | { |
Murali Nalajala | a7efba1 | 2012-02-23 18:13:52 +0530 | [diff] [blame] | 1697 | bool allow[MSM_PM_SLEEP_MODE_NR]; |
| 1698 | int i; |
| 1699 | |
| 1700 | for (i = 0; i < MSM_PM_SLEEP_MODE_NR; i++) { |
| 1701 | struct msm_pm_platform_data *mode; |
| 1702 | |
| 1703 | mode = &msm_pm_modes[MSM_PM_MODE(cpu, i)]; |
| 1704 | allow[i] = mode->suspend_supported && mode->suspend_enabled; |
| 1705 | } |
| 1706 | |
| 1707 | MSM_PM_DPRINTK(MSM_PM_DEBUG_HOTPLUG, KERN_INFO, |
| 1708 | "CPU%u: %s: shutting down cpu\n", cpu, __func__); |
| 1709 | |
| 1710 | if (allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE]) { |
| 1711 | msm_pm_power_collapse_standalone(false); |
| 1712 | } else if (allow[MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT]) { |
| 1713 | msm_pm_swfi(false); |
| 1714 | } else { |
| 1715 | MSM_PM_DPRINTK(MSM_PM_DEBUG_HOTPLUG, KERN_INFO, |
| 1716 | "CPU%u: %s: shutting down failed!!!\n", cpu, __func__); |
| 1717 | } |
Murali Nalajala | c89f2f3 | 2012-02-07 19:23:52 +0530 | [diff] [blame] | 1718 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1719 | |
| 1720 | /****************************************************************************** |
| 1721 | * Restart Definitions |
| 1722 | *****************************************************************************/ |
| 1723 | |
| 1724 | static uint32_t restart_reason = 0x776655AA; |
| 1725 | |
| 1726 | static void msm_pm_power_off(void) |
| 1727 | { |
| 1728 | msm_rpcrouter_close(); |
| 1729 | msm_proc_comm(PCOM_POWER_DOWN, 0, 0); |
| 1730 | for (;;) |
| 1731 | ; |
| 1732 | } |
| 1733 | |
| 1734 | static void msm_pm_restart(char str, const char *cmd) |
| 1735 | { |
| 1736 | msm_rpcrouter_close(); |
| 1737 | msm_proc_comm(PCOM_RESET_CHIP, &restart_reason, 0); |
| 1738 | |
| 1739 | for (;;) |
| 1740 | ; |
| 1741 | } |
| 1742 | |
| 1743 | static int msm_reboot_call |
| 1744 | (struct notifier_block *this, unsigned long code, void *_cmd) |
| 1745 | { |
| 1746 | if ((code == SYS_RESTART) && _cmd) { |
| 1747 | char *cmd = _cmd; |
| 1748 | if (!strcmp(cmd, "bootloader")) { |
| 1749 | restart_reason = 0x77665500; |
| 1750 | } else if (!strcmp(cmd, "recovery")) { |
| 1751 | restart_reason = 0x77665502; |
| 1752 | } else if (!strcmp(cmd, "eraseflash")) { |
| 1753 | restart_reason = 0x776655EF; |
| 1754 | } else if (!strncmp(cmd, "oem-", 4)) { |
| 1755 | unsigned code = simple_strtoul(cmd + 4, 0, 16) & 0xff; |
| 1756 | restart_reason = 0x6f656d00 | code; |
| 1757 | } else { |
| 1758 | restart_reason = 0x77665501; |
| 1759 | } |
| 1760 | } |
| 1761 | return NOTIFY_DONE; |
| 1762 | } |
| 1763 | |
| 1764 | static struct notifier_block msm_reboot_notifier = { |
| 1765 | .notifier_call = msm_reboot_call, |
| 1766 | }; |
| 1767 | |
| 1768 | |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1769 | /* |
| 1770 | * Initialize the power management subsystem. |
| 1771 | * |
| 1772 | * Return value: |
| 1773 | * -ENODEV: initialization failed |
| 1774 | * 0: success |
| 1775 | */ |
| 1776 | static int __init msm_pm_init(void) |
| 1777 | { |
| 1778 | #ifdef CONFIG_MSM_IDLE_STATS |
| 1779 | struct proc_dir_entry *d_entry; |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 1780 | unsigned int cpu; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1781 | #endif |
| 1782 | int ret; |
| 1783 | #ifdef CONFIG_CPU_V7 |
| 1784 | pgd_t *pc_pgd; |
| 1785 | pmd_t *pmd; |
| 1786 | unsigned long pmdval; |
| 1787 | |
Aparna Mallavarapu | ced4728 | 2012-03-08 12:29:41 +0530 | [diff] [blame] | 1788 | if (cpu_is_msm8625()) |
| 1789 | return 0; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1790 | /* Page table for cores to come back up safely. */ |
| 1791 | pc_pgd = pgd_alloc(&init_mm); |
| 1792 | if (!pc_pgd) |
| 1793 | return -ENOMEM; |
| 1794 | pmd = pmd_offset(pc_pgd + |
| 1795 | pgd_index(virt_to_phys(msm_pm_collapse_exit)), |
| 1796 | virt_to_phys(msm_pm_collapse_exit)); |
| 1797 | pmdval = (virt_to_phys(msm_pm_collapse_exit) & PGDIR_MASK) | |
| 1798 | PMD_TYPE_SECT | PMD_SECT_AP_WRITE; |
| 1799 | pmd[0] = __pmd(pmdval); |
| 1800 | pmd[1] = __pmd(pmdval + (1 << (PGDIR_SHIFT - 1))); |
| 1801 | |
| 1802 | /* It is remotely possible that the code in msm_pm_collapse_exit() |
| 1803 | * which turns on the MMU with this mapping is in the |
| 1804 | * next even-numbered megabyte beyond the |
| 1805 | * start of msm_pm_collapse_exit(). |
| 1806 | * Map this megabyte in as well. |
| 1807 | */ |
| 1808 | pmd[2] = __pmd(pmdval + (2 << (PGDIR_SHIFT - 1))); |
| 1809 | flush_pmd_entry(pmd); |
| 1810 | msm_pm_pc_pgd = virt_to_phys(pc_pgd); |
| 1811 | #endif |
| 1812 | |
| 1813 | pm_power_off = msm_pm_power_off; |
| 1814 | arm_pm_restart = msm_pm_restart; |
| 1815 | register_reboot_notifier(&msm_reboot_notifier); |
| 1816 | |
| 1817 | msm_pm_smem_data = smem_alloc(SMEM_APPS_DEM_SLAVE_DATA, |
| 1818 | sizeof(*msm_pm_smem_data)); |
| 1819 | if (msm_pm_smem_data == NULL) { |
| 1820 | printk(KERN_ERR "%s: failed to get smsm_data\n", __func__); |
| 1821 | return -ENODEV; |
| 1822 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1823 | |
| 1824 | ret = msm_timer_init_time_sync(msm_pm_timeout); |
| 1825 | if (ret) |
| 1826 | return ret; |
| 1827 | |
| 1828 | ret = smsm_change_intr_mask(SMSM_POWER_MASTER_DEM, 0xFFFFFFFF, 0); |
| 1829 | if (ret) { |
| 1830 | printk(KERN_ERR "%s: failed to clear interrupt mask, %d\n", |
| 1831 | __func__, ret); |
| 1832 | return ret; |
| 1833 | } |
| 1834 | |
| 1835 | #ifdef CONFIG_MSM_MEMORY_LOW_POWER_MODE |
| 1836 | /* The wakeup_reason field is overloaded during initialization time |
| 1837 | to signal Modem that Apps will control the low power modes of |
| 1838 | the memory. |
| 1839 | */ |
| 1840 | msm_pm_smem_data->wakeup_reason = 1; |
| 1841 | smsm_change_state(SMSM_APPS_DEM, 0, DEM_SLAVE_SMSM_RUN); |
| 1842 | #endif |
| 1843 | |
| 1844 | BUG_ON(msm_pm_modes == NULL); |
| 1845 | |
| 1846 | atomic_set(&msm_pm_init_done, 1); |
| 1847 | suspend_set_ops(&msm_pm_ops); |
| 1848 | |
| 1849 | msm_pm_mode_sysfs_add(); |
| 1850 | #ifdef CONFIG_MSM_IDLE_STATS |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 1851 | for_each_possible_cpu(cpu) { |
| 1852 | struct msm_pm_time_stats *stats = |
| 1853 | per_cpu(msm_pm_stats, cpu).stats; |
| 1854 | |
| 1855 | stats[MSM_PM_STAT_REQUESTED_IDLE].name = "idle-request"; |
| 1856 | stats[MSM_PM_STAT_REQUESTED_IDLE].first_bucket_time = |
| 1857 | CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| 1858 | |
| 1859 | stats[MSM_PM_STAT_IDLE_SPIN].name = "idle-spin"; |
| 1860 | stats[MSM_PM_STAT_IDLE_SPIN].first_bucket_time = |
| 1861 | CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| 1862 | |
| 1863 | stats[MSM_PM_STAT_IDLE_WFI].name = "idle-wfi"; |
| 1864 | stats[MSM_PM_STAT_IDLE_WFI].first_bucket_time = |
| 1865 | CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| 1866 | |
| 1867 | stats[MSM_PM_STAT_IDLE_STANDALONE_POWER_COLLAPSE].name = |
| 1868 | "idle-standalone-power-collapse"; |
| 1869 | stats[MSM_PM_STAT_IDLE_STANDALONE_POWER_COLLAPSE]. |
| 1870 | first_bucket_time = |
| 1871 | CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| 1872 | |
| 1873 | stats[MSM_PM_STAT_IDLE_FAILED_STANDALONE_POWER_COLLAPSE].name = |
| 1874 | "idle-failed-standalone-power-collapse"; |
| 1875 | stats[MSM_PM_STAT_IDLE_FAILED_STANDALONE_POWER_COLLAPSE]. |
| 1876 | first_bucket_time = |
| 1877 | CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| 1878 | |
Murali Nalajala | 0df9fee | 2012-01-12 15:26:09 +0530 | [diff] [blame] | 1879 | stats[MSM_PM_STAT_IDLE_POWER_COLLAPSE].name = |
| 1880 | "idle-power-collapse"; |
| 1881 | stats[MSM_PM_STAT_IDLE_POWER_COLLAPSE].first_bucket_time = |
| 1882 | CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| 1883 | |
| 1884 | stats[MSM_PM_STAT_IDLE_FAILED_POWER_COLLAPSE].name = |
| 1885 | "idle-failed-power-collapse"; |
| 1886 | stats[MSM_PM_STAT_IDLE_FAILED_POWER_COLLAPSE]. |
| 1887 | first_bucket_time = |
| 1888 | CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| 1889 | |
| 1890 | stats[MSM_PM_STAT_SUSPEND].name = "suspend"; |
| 1891 | stats[MSM_PM_STAT_SUSPEND].first_bucket_time = |
| 1892 | CONFIG_MSM_SUSPEND_STATS_FIRST_BUCKET; |
| 1893 | |
| 1894 | stats[MSM_PM_STAT_FAILED_SUSPEND].name = "failed-suspend"; |
| 1895 | stats[MSM_PM_STAT_FAILED_SUSPEND].first_bucket_time = |
| 1896 | CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| 1897 | |
| 1898 | stats[MSM_PM_STAT_NOT_IDLE].name = "not-idle"; |
| 1899 | stats[MSM_PM_STAT_NOT_IDLE].first_bucket_time = |
| 1900 | CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| 1901 | } |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1902 | d_entry = create_proc_entry("msm_pm_stats", |
| 1903 | S_IRUGO | S_IWUSR | S_IWGRP, NULL); |
| 1904 | if (d_entry) { |
| 1905 | d_entry->read_proc = msm_pm_read_proc; |
| 1906 | d_entry->write_proc = msm_pm_write_proc; |
| 1907 | d_entry->data = NULL; |
| 1908 | } |
| 1909 | #endif |
| 1910 | |
| 1911 | return 0; |
| 1912 | } |
| 1913 | |
| 1914 | late_initcall_sync(msm_pm_init); |