Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/completion.h> |
| 18 | #include <linux/cpuidle.h> |
| 19 | #include <linux/interrupt.h> |
| 20 | #include <linux/io.h> |
| 21 | #include <linux/ktime.h> |
| 22 | #include <linux/pm.h> |
| 23 | #include <linux/pm_qos_params.h> |
| 24 | #include <linux/proc_fs.h> |
| 25 | #include <linux/smp.h> |
| 26 | #include <linux/suspend.h> |
| 27 | #include <linux/tick.h> |
| 28 | #include <linux/uaccess.h> |
| 29 | #include <linux/wakelock.h> |
| 30 | #include <mach/msm_iomap.h> |
| 31 | #include <mach/system.h> |
| 32 | #include <asm/cacheflush.h> |
| 33 | #include <asm/hardware/gic.h> |
| 34 | #include <asm/pgtable.h> |
| 35 | #include <asm/pgalloc.h> |
| 36 | #ifdef CONFIG_VFP |
| 37 | #include <asm/vfp.h> |
| 38 | #endif |
| 39 | |
| 40 | #include "acpuclock.h" |
| 41 | #include "clock.h" |
| 42 | #include "avs.h" |
| 43 | #include "cpuidle.h" |
| 44 | #include "idle.h" |
| 45 | #include "pm.h" |
| 46 | #include "rpm_resources.h" |
| 47 | #include "scm-boot.h" |
| 48 | #include "spm.h" |
| 49 | #include "timer.h" |
| 50 | |
| 51 | /****************************************************************************** |
| 52 | * Debug Definitions |
| 53 | *****************************************************************************/ |
| 54 | |
| 55 | enum { |
| 56 | MSM_PM_DEBUG_SUSPEND = BIT(0), |
| 57 | MSM_PM_DEBUG_POWER_COLLAPSE = BIT(1), |
| 58 | MSM_PM_DEBUG_SUSPEND_LIMITS = BIT(2), |
| 59 | MSM_PM_DEBUG_CLOCK = BIT(3), |
| 60 | MSM_PM_DEBUG_RESET_VECTOR = BIT(4), |
| 61 | MSM_PM_DEBUG_IDLE = BIT(6), |
| 62 | MSM_PM_DEBUG_IDLE_LIMITS = BIT(7), |
| 63 | MSM_PM_DEBUG_HOTPLUG = BIT(8), |
| 64 | }; |
| 65 | |
| 66 | static int msm_pm_debug_mask = 1; |
| 67 | module_param_named( |
| 68 | debug_mask, msm_pm_debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP |
| 69 | ); |
| 70 | |
| 71 | |
| 72 | /****************************************************************************** |
| 73 | * Sleep Modes and Parameters |
| 74 | *****************************************************************************/ |
| 75 | |
| 76 | static struct msm_pm_platform_data *msm_pm_modes; |
| 77 | static int rpm_cpu0_wakeup_irq; |
| 78 | |
| 79 | void __init msm_pm_set_platform_data( |
| 80 | struct msm_pm_platform_data *data, int count) |
| 81 | { |
| 82 | BUG_ON(MSM_PM_SLEEP_MODE_NR * num_possible_cpus() > count); |
| 83 | msm_pm_modes = data; |
| 84 | } |
| 85 | |
| 86 | void __init msm_pm_set_rpm_wakeup_irq(unsigned int irq) |
| 87 | { |
| 88 | rpm_cpu0_wakeup_irq = irq; |
| 89 | } |
| 90 | |
| 91 | enum { |
| 92 | MSM_PM_MODE_ATTR_SUSPEND, |
| 93 | MSM_PM_MODE_ATTR_IDLE, |
| 94 | MSM_PM_MODE_ATTR_NR, |
| 95 | }; |
| 96 | |
| 97 | static char *msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_NR] = { |
| 98 | [MSM_PM_MODE_ATTR_SUSPEND] = "suspend_enabled", |
| 99 | [MSM_PM_MODE_ATTR_IDLE] = "idle_enabled", |
| 100 | }; |
| 101 | |
| 102 | struct msm_pm_kobj_attribute { |
| 103 | unsigned int cpu; |
| 104 | struct kobj_attribute ka; |
| 105 | }; |
| 106 | |
| 107 | #define GET_CPU_OF_ATTR(attr) \ |
| 108 | (container_of(attr, struct msm_pm_kobj_attribute, ka)->cpu) |
| 109 | |
| 110 | struct msm_pm_sysfs_sleep_mode { |
| 111 | struct kobject *kobj; |
| 112 | struct attribute_group attr_group; |
| 113 | struct attribute *attrs[MSM_PM_MODE_ATTR_NR + 1]; |
| 114 | struct msm_pm_kobj_attribute kas[MSM_PM_MODE_ATTR_NR]; |
| 115 | }; |
| 116 | |
| 117 | static char *msm_pm_sleep_mode_labels[MSM_PM_SLEEP_MODE_NR] = { |
| 118 | [MSM_PM_SLEEP_MODE_POWER_COLLAPSE] = "power_collapse", |
| 119 | [MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT] = "wfi", |
| 120 | [MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE] = |
| 121 | "standalone_power_collapse", |
| 122 | }; |
| 123 | |
| 124 | /* |
| 125 | * Write out the attribute. |
| 126 | */ |
| 127 | static ssize_t msm_pm_mode_attr_show( |
| 128 | struct kobject *kobj, struct kobj_attribute *attr, char *buf) |
| 129 | { |
| 130 | int ret = -EINVAL; |
| 131 | int i; |
| 132 | |
| 133 | for (i = 0; i < MSM_PM_SLEEP_MODE_NR; i++) { |
| 134 | struct kernel_param kp; |
| 135 | unsigned int cpu; |
| 136 | struct msm_pm_platform_data *mode; |
| 137 | |
| 138 | if (msm_pm_sleep_mode_labels[i] == NULL) |
| 139 | continue; |
| 140 | |
| 141 | if (strcmp(kobj->name, msm_pm_sleep_mode_labels[i])) |
| 142 | continue; |
| 143 | |
| 144 | cpu = GET_CPU_OF_ATTR(attr); |
| 145 | mode = &msm_pm_modes[MSM_PM_MODE(cpu, i)]; |
| 146 | |
| 147 | if (!strcmp(attr->attr.name, |
| 148 | msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_SUSPEND])) { |
| 149 | u32 arg = mode->suspend_enabled; |
| 150 | kp.arg = &arg; |
| 151 | ret = param_get_ulong(buf, &kp); |
| 152 | } else if (!strcmp(attr->attr.name, |
| 153 | msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_IDLE])) { |
| 154 | u32 arg = mode->idle_enabled; |
| 155 | kp.arg = &arg; |
| 156 | ret = param_get_ulong(buf, &kp); |
| 157 | } |
| 158 | |
| 159 | break; |
| 160 | } |
| 161 | |
| 162 | if (ret > 0) { |
| 163 | strcat(buf, "\n"); |
| 164 | ret++; |
| 165 | } |
| 166 | |
| 167 | return ret; |
| 168 | } |
| 169 | |
| 170 | /* |
| 171 | * Read in the new attribute value. |
| 172 | */ |
| 173 | static ssize_t msm_pm_mode_attr_store(struct kobject *kobj, |
| 174 | struct kobj_attribute *attr, const char *buf, size_t count) |
| 175 | { |
| 176 | int ret = -EINVAL; |
| 177 | int i; |
| 178 | |
| 179 | for (i = 0; i < MSM_PM_SLEEP_MODE_NR; i++) { |
| 180 | struct kernel_param kp; |
| 181 | unsigned int cpu; |
| 182 | struct msm_pm_platform_data *mode; |
| 183 | |
| 184 | if (msm_pm_sleep_mode_labels[i] == NULL) |
| 185 | continue; |
| 186 | |
| 187 | if (strcmp(kobj->name, msm_pm_sleep_mode_labels[i])) |
| 188 | continue; |
| 189 | |
| 190 | cpu = GET_CPU_OF_ATTR(attr); |
| 191 | mode = &msm_pm_modes[MSM_PM_MODE(cpu, i)]; |
| 192 | |
| 193 | if (!strcmp(attr->attr.name, |
| 194 | msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_SUSPEND])) { |
| 195 | kp.arg = &mode->suspend_enabled; |
| 196 | ret = param_set_byte(buf, &kp); |
| 197 | } else if (!strcmp(attr->attr.name, |
| 198 | msm_pm_mode_attr_labels[MSM_PM_MODE_ATTR_IDLE])) { |
| 199 | kp.arg = &mode->idle_enabled; |
| 200 | ret = param_set_byte(buf, &kp); |
| 201 | } |
| 202 | |
| 203 | break; |
| 204 | } |
| 205 | |
| 206 | return ret ? ret : count; |
| 207 | } |
| 208 | |
| 209 | /* |
| 210 | * Add sysfs entries for one cpu. |
| 211 | */ |
| 212 | static int __init msm_pm_mode_sysfs_add_cpu( |
| 213 | unsigned int cpu, struct kobject *modes_kobj) |
| 214 | { |
| 215 | char cpu_name[8]; |
| 216 | struct kobject *cpu_kobj; |
| 217 | struct msm_pm_sysfs_sleep_mode *mode; |
| 218 | int i, j, k; |
| 219 | int ret; |
| 220 | |
| 221 | snprintf(cpu_name, sizeof(cpu_name), "cpu%u", cpu); |
| 222 | cpu_kobj = kobject_create_and_add(cpu_name, modes_kobj); |
| 223 | if (!cpu_kobj) { |
| 224 | pr_err("%s: cannot create %s kobject\n", __func__, cpu_name); |
| 225 | ret = -ENOMEM; |
| 226 | goto mode_sysfs_add_cpu_exit; |
| 227 | } |
| 228 | |
| 229 | for (i = 0; i < MSM_PM_SLEEP_MODE_NR; i++) { |
| 230 | int idx = MSM_PM_MODE(cpu, i); |
| 231 | |
| 232 | if ((!msm_pm_modes[idx].suspend_supported) |
| 233 | && (!msm_pm_modes[idx].idle_supported)) |
| 234 | continue; |
| 235 | |
| 236 | mode = kzalloc(sizeof(*mode), GFP_KERNEL); |
| 237 | if (!mode) { |
| 238 | pr_err("%s: cannot allocate memory for attributes\n", |
| 239 | __func__); |
| 240 | ret = -ENOMEM; |
| 241 | goto mode_sysfs_add_cpu_exit; |
| 242 | } |
| 243 | |
| 244 | mode->kobj = kobject_create_and_add( |
| 245 | msm_pm_sleep_mode_labels[i], cpu_kobj); |
| 246 | if (!mode->kobj) { |
| 247 | pr_err("%s: cannot create kobject\n", __func__); |
| 248 | ret = -ENOMEM; |
| 249 | goto mode_sysfs_add_cpu_exit; |
| 250 | } |
| 251 | |
| 252 | for (k = 0, j = 0; k < MSM_PM_MODE_ATTR_NR; k++) { |
| 253 | if ((k == MSM_PM_MODE_ATTR_IDLE) && |
| 254 | !msm_pm_modes[idx].idle_supported) |
| 255 | continue; |
| 256 | if ((k == MSM_PM_MODE_ATTR_SUSPEND) && |
| 257 | !msm_pm_modes[idx].suspend_supported) |
| 258 | continue; |
| 259 | mode->kas[j].cpu = cpu; |
| 260 | mode->kas[j].ka.attr.mode = 0644; |
| 261 | mode->kas[j].ka.show = msm_pm_mode_attr_show; |
| 262 | mode->kas[j].ka.store = msm_pm_mode_attr_store; |
| 263 | mode->kas[j].ka.attr.name = msm_pm_mode_attr_labels[k]; |
| 264 | mode->attrs[j] = &mode->kas[j].ka.attr; |
| 265 | j++; |
| 266 | } |
| 267 | mode->attrs[j] = NULL; |
| 268 | |
| 269 | mode->attr_group.attrs = mode->attrs; |
| 270 | ret = sysfs_create_group(mode->kobj, &mode->attr_group); |
| 271 | if (ret) { |
| 272 | pr_err("%s: cannot create kobject attribute group\n", |
| 273 | __func__); |
| 274 | goto mode_sysfs_add_cpu_exit; |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | ret = 0; |
| 279 | |
| 280 | mode_sysfs_add_cpu_exit: |
| 281 | return ret; |
| 282 | } |
| 283 | |
| 284 | /* |
| 285 | * Add sysfs entries for the sleep modes. |
| 286 | */ |
| 287 | static int __init msm_pm_mode_sysfs_add(void) |
| 288 | { |
| 289 | struct kobject *module_kobj; |
| 290 | struct kobject *modes_kobj; |
| 291 | unsigned int cpu; |
| 292 | int ret; |
| 293 | |
| 294 | module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME); |
| 295 | if (!module_kobj) { |
| 296 | pr_err("%s: cannot find kobject for module %s\n", |
| 297 | __func__, KBUILD_MODNAME); |
| 298 | ret = -ENOENT; |
| 299 | goto mode_sysfs_add_exit; |
| 300 | } |
| 301 | |
| 302 | modes_kobj = kobject_create_and_add("modes", module_kobj); |
| 303 | if (!modes_kobj) { |
| 304 | pr_err("%s: cannot create modes kobject\n", __func__); |
| 305 | ret = -ENOMEM; |
| 306 | goto mode_sysfs_add_exit; |
| 307 | } |
| 308 | |
| 309 | for_each_possible_cpu(cpu) { |
| 310 | ret = msm_pm_mode_sysfs_add_cpu(cpu, modes_kobj); |
| 311 | if (ret) |
| 312 | goto mode_sysfs_add_exit; |
| 313 | } |
| 314 | |
| 315 | ret = 0; |
| 316 | |
| 317 | mode_sysfs_add_exit: |
| 318 | return ret; |
| 319 | } |
| 320 | |
| 321 | /****************************************************************************** |
| 322 | * CONFIG_MSM_IDLE_STATS |
| 323 | *****************************************************************************/ |
| 324 | |
| 325 | #ifdef CONFIG_MSM_IDLE_STATS |
| 326 | enum msm_pm_time_stats_id { |
| 327 | MSM_PM_STAT_REQUESTED_IDLE, |
| 328 | MSM_PM_STAT_IDLE_WFI, |
| 329 | MSM_PM_STAT_IDLE_STANDALONE_POWER_COLLAPSE, |
| 330 | MSM_PM_STAT_IDLE_POWER_COLLAPSE, |
| 331 | MSM_PM_STAT_SUSPEND, |
| 332 | MSM_PM_STAT_COUNT |
| 333 | }; |
| 334 | |
| 335 | struct msm_pm_time_stats { |
| 336 | const char *name; |
| 337 | int64_t first_bucket_time; |
| 338 | int bucket[CONFIG_MSM_IDLE_STATS_BUCKET_COUNT]; |
| 339 | int64_t min_time[CONFIG_MSM_IDLE_STATS_BUCKET_COUNT]; |
| 340 | int64_t max_time[CONFIG_MSM_IDLE_STATS_BUCKET_COUNT]; |
| 341 | int count; |
| 342 | int64_t total_time; |
| 343 | }; |
| 344 | |
| 345 | struct msm_pm_cpu_time_stats { |
| 346 | struct msm_pm_time_stats stats[MSM_PM_STAT_COUNT]; |
| 347 | }; |
| 348 | |
| 349 | static DEFINE_SPINLOCK(msm_pm_stats_lock); |
| 350 | static DEFINE_PER_CPU_SHARED_ALIGNED( |
| 351 | struct msm_pm_cpu_time_stats, msm_pm_stats); |
| 352 | |
| 353 | /* |
| 354 | * Add the given time data to the statistics collection. |
| 355 | */ |
| 356 | static void msm_pm_add_stat(enum msm_pm_time_stats_id id, int64_t t) |
| 357 | { |
| 358 | unsigned long flags; |
| 359 | struct msm_pm_time_stats *stats; |
| 360 | int64_t bt; |
| 361 | int i; |
| 362 | |
| 363 | spin_lock_irqsave(&msm_pm_stats_lock, flags); |
| 364 | stats = __get_cpu_var(msm_pm_stats).stats; |
| 365 | |
| 366 | stats[id].total_time += t; |
| 367 | stats[id].count++; |
| 368 | |
| 369 | bt = t; |
| 370 | do_div(bt, stats[id].first_bucket_time); |
| 371 | |
| 372 | if (bt < 1ULL << (CONFIG_MSM_IDLE_STATS_BUCKET_SHIFT * |
| 373 | (CONFIG_MSM_IDLE_STATS_BUCKET_COUNT - 1))) |
| 374 | i = DIV_ROUND_UP(fls((uint32_t)bt), |
| 375 | CONFIG_MSM_IDLE_STATS_BUCKET_SHIFT); |
| 376 | else |
| 377 | i = CONFIG_MSM_IDLE_STATS_BUCKET_COUNT - 1; |
| 378 | |
| 379 | stats[id].bucket[i]++; |
| 380 | |
| 381 | if (t < stats[id].min_time[i] || !stats[id].max_time[i]) |
| 382 | stats[id].min_time[i] = t; |
| 383 | if (t > stats[id].max_time[i]) |
| 384 | stats[id].max_time[i] = t; |
| 385 | |
| 386 | spin_unlock_irqrestore(&msm_pm_stats_lock, flags); |
| 387 | } |
| 388 | |
| 389 | /* |
| 390 | * Helper function of snprintf where buf is auto-incremented, size is auto- |
| 391 | * decremented, and there is no return value. |
| 392 | * |
| 393 | * NOTE: buf and size must be l-values (e.g. variables) |
| 394 | */ |
| 395 | #define SNPRINTF(buf, size, format, ...) \ |
| 396 | do { \ |
| 397 | if (size > 0) { \ |
| 398 | int ret; \ |
| 399 | ret = snprintf(buf, size, format, ## __VA_ARGS__); \ |
| 400 | if (ret > size) { \ |
| 401 | buf += size; \ |
| 402 | size = 0; \ |
| 403 | } else { \ |
| 404 | buf += ret; \ |
| 405 | size -= ret; \ |
| 406 | } \ |
| 407 | } \ |
| 408 | } while (0) |
| 409 | |
| 410 | /* |
| 411 | * Write out the power management statistics. |
| 412 | */ |
| 413 | static int msm_pm_read_proc |
| 414 | (char *page, char **start, off_t off, int count, int *eof, void *data) |
| 415 | { |
| 416 | unsigned int cpu = off / MSM_PM_STAT_COUNT; |
| 417 | int id = off % MSM_PM_STAT_COUNT; |
| 418 | char *p = page; |
| 419 | |
| 420 | if (count < 1024) { |
| 421 | *start = (char *) 0; |
| 422 | *eof = 0; |
| 423 | return 0; |
| 424 | } |
| 425 | |
| 426 | if (cpu < num_possible_cpus()) { |
| 427 | unsigned long flags; |
| 428 | struct msm_pm_time_stats *stats; |
| 429 | int i; |
| 430 | int64_t bucket_time; |
| 431 | int64_t s; |
| 432 | uint32_t ns; |
| 433 | |
| 434 | spin_lock_irqsave(&msm_pm_stats_lock, flags); |
| 435 | stats = per_cpu(msm_pm_stats, cpu).stats; |
| 436 | |
| 437 | s = stats[id].total_time; |
| 438 | ns = do_div(s, NSEC_PER_SEC); |
| 439 | SNPRINTF(p, count, |
| 440 | "[cpu %u] %s:\n" |
| 441 | " count: %7d\n" |
| 442 | " total_time: %lld.%09u\n", |
| 443 | cpu, stats[id].name, |
| 444 | stats[id].count, |
| 445 | s, ns); |
| 446 | |
| 447 | bucket_time = stats[id].first_bucket_time; |
| 448 | for (i = 0; i < CONFIG_MSM_IDLE_STATS_BUCKET_COUNT - 1; i++) { |
| 449 | s = bucket_time; |
| 450 | ns = do_div(s, NSEC_PER_SEC); |
| 451 | SNPRINTF(p, count, |
| 452 | " <%6lld.%09u: %7d (%lld-%lld)\n", |
| 453 | s, ns, stats[id].bucket[i], |
| 454 | stats[id].min_time[i], |
| 455 | stats[id].max_time[i]); |
| 456 | |
| 457 | bucket_time <<= CONFIG_MSM_IDLE_STATS_BUCKET_SHIFT; |
| 458 | } |
| 459 | |
| 460 | SNPRINTF(p, count, " >=%6lld.%09u: %7d (%lld-%lld)\n", |
| 461 | s, ns, stats[id].bucket[i], |
| 462 | stats[id].min_time[i], |
| 463 | stats[id].max_time[i]); |
| 464 | |
| 465 | *start = (char *) 1; |
| 466 | *eof = (off + 1 >= MSM_PM_STAT_COUNT * num_possible_cpus()); |
| 467 | |
| 468 | spin_unlock_irqrestore(&msm_pm_stats_lock, flags); |
| 469 | } |
| 470 | |
| 471 | return p - page; |
| 472 | } |
| 473 | #undef SNPRINTF |
| 474 | |
| 475 | #define MSM_PM_STATS_RESET "reset" |
| 476 | |
| 477 | /* |
| 478 | * Reset the power management statistics values. |
| 479 | */ |
| 480 | static int msm_pm_write_proc(struct file *file, const char __user *buffer, |
| 481 | unsigned long count, void *data) |
| 482 | { |
| 483 | char buf[sizeof(MSM_PM_STATS_RESET)]; |
| 484 | int ret; |
| 485 | unsigned long flags; |
| 486 | unsigned int cpu; |
| 487 | |
| 488 | if (count < strlen(MSM_PM_STATS_RESET)) { |
| 489 | ret = -EINVAL; |
| 490 | goto write_proc_failed; |
| 491 | } |
| 492 | |
| 493 | if (copy_from_user(buf, buffer, strlen(MSM_PM_STATS_RESET))) { |
| 494 | ret = -EFAULT; |
| 495 | goto write_proc_failed; |
| 496 | } |
| 497 | |
| 498 | if (memcmp(buf, MSM_PM_STATS_RESET, strlen(MSM_PM_STATS_RESET))) { |
| 499 | ret = -EINVAL; |
| 500 | goto write_proc_failed; |
| 501 | } |
| 502 | |
| 503 | spin_lock_irqsave(&msm_pm_stats_lock, flags); |
| 504 | for_each_possible_cpu(cpu) { |
| 505 | struct msm_pm_time_stats *stats; |
| 506 | int i; |
| 507 | |
| 508 | stats = per_cpu(msm_pm_stats, cpu).stats; |
| 509 | for (i = 0; i < MSM_PM_STAT_COUNT; i++) { |
| 510 | memset(stats[i].bucket, |
| 511 | 0, sizeof(stats[i].bucket)); |
| 512 | memset(stats[i].min_time, |
| 513 | 0, sizeof(stats[i].min_time)); |
| 514 | memset(stats[i].max_time, |
| 515 | 0, sizeof(stats[i].max_time)); |
| 516 | stats[i].count = 0; |
| 517 | stats[i].total_time = 0; |
| 518 | } |
| 519 | } |
| 520 | |
| 521 | spin_unlock_irqrestore(&msm_pm_stats_lock, flags); |
| 522 | return count; |
| 523 | |
| 524 | write_proc_failed: |
| 525 | return ret; |
| 526 | } |
| 527 | #undef MSM_PM_STATS_RESET |
| 528 | #endif /* CONFIG_MSM_IDLE_STATS */ |
| 529 | |
| 530 | |
| 531 | /****************************************************************************** |
| 532 | * Configure Hardware before/after Low Power Mode |
| 533 | *****************************************************************************/ |
| 534 | |
| 535 | /* |
| 536 | * Configure hardware registers in preparation for Apps power down. |
| 537 | */ |
| 538 | static void msm_pm_config_hw_before_power_down(void) |
| 539 | { |
| 540 | return; |
| 541 | } |
| 542 | |
| 543 | /* |
| 544 | * Clear hardware registers after Apps powers up. |
| 545 | */ |
| 546 | static void msm_pm_config_hw_after_power_up(void) |
| 547 | { |
| 548 | return; |
| 549 | } |
| 550 | |
| 551 | /* |
| 552 | * Configure hardware registers in preparation for SWFI. |
| 553 | */ |
| 554 | static void msm_pm_config_hw_before_swfi(void) |
| 555 | { |
| 556 | return; |
| 557 | } |
| 558 | |
| 559 | |
| 560 | /****************************************************************************** |
| 561 | * Suspend Max Sleep Time |
| 562 | *****************************************************************************/ |
| 563 | |
| 564 | #ifdef CONFIG_MSM_SLEEP_TIME_OVERRIDE |
| 565 | static int msm_pm_sleep_time_override; |
| 566 | module_param_named(sleep_time_override, |
| 567 | msm_pm_sleep_time_override, int, S_IRUGO | S_IWUSR | S_IWGRP); |
| 568 | #endif |
| 569 | |
| 570 | #define SCLK_HZ (32768) |
| 571 | #define MSM_PM_SLEEP_TICK_LIMIT (0x6DDD000) |
| 572 | |
| 573 | static uint32_t msm_pm_max_sleep_time; |
| 574 | |
| 575 | /* |
| 576 | * Convert time from nanoseconds to slow clock ticks, then cap it to the |
| 577 | * specified limit |
| 578 | */ |
| 579 | static int64_t msm_pm_convert_and_cap_time(int64_t time_ns, int64_t limit) |
| 580 | { |
| 581 | do_div(time_ns, NSEC_PER_SEC / SCLK_HZ); |
| 582 | return (time_ns > limit) ? limit : time_ns; |
| 583 | } |
| 584 | |
| 585 | /* |
| 586 | * Set the sleep time for suspend. 0 means infinite sleep time. |
| 587 | */ |
| 588 | void msm_pm_set_max_sleep_time(int64_t max_sleep_time_ns) |
| 589 | { |
| 590 | if (max_sleep_time_ns == 0) { |
| 591 | msm_pm_max_sleep_time = 0; |
| 592 | } else { |
| 593 | msm_pm_max_sleep_time = (uint32_t)msm_pm_convert_and_cap_time( |
| 594 | max_sleep_time_ns, MSM_PM_SLEEP_TICK_LIMIT); |
| 595 | |
| 596 | if (msm_pm_max_sleep_time == 0) |
| 597 | msm_pm_max_sleep_time = 1; |
| 598 | } |
| 599 | |
| 600 | if (msm_pm_debug_mask & MSM_PM_DEBUG_SUSPEND) |
| 601 | pr_info("%s: Requested %lld ns Giving %u sclk ticks\n", |
| 602 | __func__, max_sleep_time_ns, msm_pm_max_sleep_time); |
| 603 | } |
| 604 | EXPORT_SYMBOL(msm_pm_set_max_sleep_time); |
| 605 | |
| 606 | |
| 607 | /****************************************************************************** |
| 608 | * |
| 609 | *****************************************************************************/ |
| 610 | |
| 611 | struct msm_pm_device { |
| 612 | unsigned int cpu; |
| 613 | #ifdef CONFIG_HOTPLUG_CPU |
| 614 | struct completion cpu_killed; |
| 615 | unsigned int warm_boot; |
| 616 | #endif |
| 617 | }; |
| 618 | |
| 619 | static DEFINE_PER_CPU_SHARED_ALIGNED(struct msm_pm_device, msm_pm_devices); |
| 620 | static struct msm_rpmrs_limits *msm_pm_idle_rs_limits; |
| 621 | |
| 622 | static void msm_pm_swfi(void) |
| 623 | { |
| 624 | msm_pm_config_hw_before_swfi(); |
| 625 | msm_arch_idle(); |
| 626 | } |
| 627 | |
Maheshkumar Sivasubramanian | dd93ecf | 2011-09-15 19:39:14 -0600 | [diff] [blame^] | 628 | static bool msm_pm_spm_power_collapse( |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 629 | struct msm_pm_device *dev, bool from_idle, bool notify_rpm) |
| 630 | { |
| 631 | void *entry; |
Maheshkumar Sivasubramanian | dd93ecf | 2011-09-15 19:39:14 -0600 | [diff] [blame^] | 632 | bool collapsed = 0; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 633 | int ret; |
| 634 | |
| 635 | if (MSM_PM_DEBUG_POWER_COLLAPSE & msm_pm_debug_mask) |
| 636 | pr_info("CPU%u: %s: notify_rpm %d\n", |
| 637 | dev->cpu, __func__, (int) notify_rpm); |
| 638 | |
| 639 | ret = msm_spm_set_low_power_mode( |
| 640 | MSM_SPM_MODE_POWER_COLLAPSE, notify_rpm); |
| 641 | WARN_ON(ret); |
| 642 | |
| 643 | entry = (!dev->cpu || from_idle) ? |
| 644 | msm_pm_collapse_exit : msm_secondary_startup; |
| 645 | msm_pm_write_boot_vector(dev->cpu, virt_to_phys(entry)); |
| 646 | |
| 647 | if (MSM_PM_DEBUG_RESET_VECTOR & msm_pm_debug_mask) |
| 648 | pr_info("CPU%u: %s: program vector to %p\n", |
| 649 | dev->cpu, __func__, entry); |
| 650 | |
| 651 | #ifdef CONFIG_VFP |
| 652 | vfp_flush_context(); |
| 653 | #endif |
| 654 | |
| 655 | collapsed = msm_pm_collapse(); |
| 656 | |
| 657 | if (collapsed) { |
| 658 | #ifdef CONFIG_VFP |
| 659 | vfp_reinit(); |
| 660 | #endif |
| 661 | cpu_init(); |
| 662 | writel(0xF0, MSM_QGIC_CPU_BASE + GIC_CPU_PRIMASK); |
| 663 | writel(1, MSM_QGIC_CPU_BASE + GIC_CPU_CTRL); |
| 664 | local_fiq_enable(); |
| 665 | } |
| 666 | |
| 667 | if (MSM_PM_DEBUG_POWER_COLLAPSE & msm_pm_debug_mask) |
| 668 | pr_info("CPU%u: %s: msm_pm_collapse returned, collapsed %d\n", |
| 669 | dev->cpu, __func__, collapsed); |
| 670 | |
| 671 | ret = msm_spm_set_low_power_mode(MSM_SPM_MODE_CLOCK_GATING, false); |
| 672 | WARN_ON(ret); |
Maheshkumar Sivasubramanian | dd93ecf | 2011-09-15 19:39:14 -0600 | [diff] [blame^] | 673 | return collapsed; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 674 | } |
| 675 | |
Maheshkumar Sivasubramanian | dd93ecf | 2011-09-15 19:39:14 -0600 | [diff] [blame^] | 676 | static bool msm_pm_power_collapse_standalone(bool from_idle) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 677 | { |
| 678 | struct msm_pm_device *dev = &__get_cpu_var(msm_pm_devices); |
| 679 | unsigned int avsdscr_setting; |
Maheshkumar Sivasubramanian | dd93ecf | 2011-09-15 19:39:14 -0600 | [diff] [blame^] | 680 | bool collapsed; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 681 | |
| 682 | avsdscr_setting = avs_get_avsdscr(); |
| 683 | avs_disable(); |
Maheshkumar Sivasubramanian | dd93ecf | 2011-09-15 19:39:14 -0600 | [diff] [blame^] | 684 | collapsed = msm_pm_spm_power_collapse(dev, from_idle, false); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 685 | avs_reset_delays(avsdscr_setting); |
Maheshkumar Sivasubramanian | dd93ecf | 2011-09-15 19:39:14 -0600 | [diff] [blame^] | 686 | return collapsed; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 687 | } |
| 688 | |
Maheshkumar Sivasubramanian | dd93ecf | 2011-09-15 19:39:14 -0600 | [diff] [blame^] | 689 | static bool msm_pm_power_collapse(bool from_idle) |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 690 | { |
| 691 | struct msm_pm_device *dev = &__get_cpu_var(msm_pm_devices); |
| 692 | unsigned long saved_acpuclk_rate; |
| 693 | unsigned int avsdscr_setting; |
Maheshkumar Sivasubramanian | dd93ecf | 2011-09-15 19:39:14 -0600 | [diff] [blame^] | 694 | bool collapsed; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 695 | |
| 696 | if (MSM_PM_DEBUG_POWER_COLLAPSE & msm_pm_debug_mask) |
| 697 | pr_info("CPU%u: %s: idle %d\n", |
| 698 | dev->cpu, __func__, (int)from_idle); |
| 699 | |
| 700 | msm_pm_config_hw_before_power_down(); |
| 701 | if (MSM_PM_DEBUG_POWER_COLLAPSE & msm_pm_debug_mask) |
| 702 | pr_info("CPU%u: %s: pre power down\n", dev->cpu, __func__); |
| 703 | |
| 704 | avsdscr_setting = avs_get_avsdscr(); |
| 705 | avs_disable(); |
| 706 | |
| 707 | if (cpu_online(dev->cpu)) |
| 708 | saved_acpuclk_rate = acpuclk_power_collapse(); |
| 709 | else |
| 710 | saved_acpuclk_rate = 0; |
| 711 | |
| 712 | if (MSM_PM_DEBUG_CLOCK & msm_pm_debug_mask) |
| 713 | pr_info("CPU%u: %s: change clock rate (old rate = %lu)\n", |
| 714 | dev->cpu, __func__, saved_acpuclk_rate); |
| 715 | |
Maheshkumar Sivasubramanian | dd93ecf | 2011-09-15 19:39:14 -0600 | [diff] [blame^] | 716 | collapsed = msm_pm_spm_power_collapse(dev, from_idle, true); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 717 | |
| 718 | if (MSM_PM_DEBUG_CLOCK & msm_pm_debug_mask) |
| 719 | pr_info("CPU%u: %s: restore clock rate to %lu\n", |
| 720 | dev->cpu, __func__, saved_acpuclk_rate); |
| 721 | if (acpuclk_set_rate(dev->cpu, saved_acpuclk_rate, SETRATE_PC) < 0) |
| 722 | pr_err("CPU%u: %s: failed to restore clock rate(%lu)\n", |
| 723 | dev->cpu, __func__, saved_acpuclk_rate); |
| 724 | |
| 725 | avs_reset_delays(avsdscr_setting); |
| 726 | msm_pm_config_hw_after_power_up(); |
| 727 | if (MSM_PM_DEBUG_POWER_COLLAPSE & msm_pm_debug_mask) |
| 728 | pr_info("CPU%u: %s: post power up\n", dev->cpu, __func__); |
| 729 | |
| 730 | if (MSM_PM_DEBUG_POWER_COLLAPSE & msm_pm_debug_mask) |
| 731 | pr_info("CPU%u: %s: return\n", dev->cpu, __func__); |
Maheshkumar Sivasubramanian | dd93ecf | 2011-09-15 19:39:14 -0600 | [diff] [blame^] | 732 | return collapsed; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 733 | } |
| 734 | |
| 735 | static irqreturn_t msm_pm_rpm_wakeup_interrupt(int irq, void *dev_id) |
| 736 | { |
| 737 | if (dev_id != &msm_pm_rpm_wakeup_interrupt) |
| 738 | return IRQ_NONE; |
| 739 | |
| 740 | return IRQ_HANDLED; |
| 741 | } |
| 742 | |
| 743 | |
| 744 | /****************************************************************************** |
| 745 | * External Idle/Suspend Functions |
| 746 | *****************************************************************************/ |
| 747 | |
| 748 | void arch_idle(void) |
| 749 | { |
| 750 | return; |
| 751 | } |
| 752 | |
| 753 | int msm_pm_idle_prepare(struct cpuidle_device *dev) |
| 754 | { |
| 755 | uint32_t latency_us; |
| 756 | uint32_t sleep_us; |
| 757 | int i; |
| 758 | |
| 759 | latency_us = (uint32_t) pm_qos_request(PM_QOS_CPU_DMA_LATENCY); |
| 760 | sleep_us = (uint32_t) ktime_to_ns(tick_nohz_get_sleep_length()); |
| 761 | sleep_us = DIV_ROUND_UP(sleep_us, 1000); |
| 762 | |
| 763 | for (i = 0; i < dev->state_count; i++) { |
| 764 | struct cpuidle_state *state = &dev->states[i]; |
| 765 | enum msm_pm_sleep_mode mode; |
| 766 | bool allow; |
| 767 | struct msm_rpmrs_limits *rs_limits = NULL; |
| 768 | int idx; |
| 769 | |
| 770 | mode = (enum msm_pm_sleep_mode) state->driver_data; |
| 771 | idx = MSM_PM_MODE(dev->cpu, mode); |
| 772 | |
| 773 | allow = msm_pm_modes[idx].idle_enabled && |
| 774 | msm_pm_modes[idx].idle_supported; |
| 775 | |
| 776 | switch (mode) { |
| 777 | case MSM_PM_SLEEP_MODE_POWER_COLLAPSE: |
| 778 | if (!allow) |
| 779 | break; |
| 780 | |
| 781 | if (num_online_cpus() > 1) { |
| 782 | allow = false; |
| 783 | break; |
| 784 | } |
| 785 | #ifdef CONFIG_HAS_WAKELOCK |
| 786 | if (has_wake_lock(WAKE_LOCK_IDLE)) { |
| 787 | allow = false; |
| 788 | break; |
| 789 | } |
| 790 | #endif |
| 791 | /* fall through */ |
| 792 | |
| 793 | case MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE: |
| 794 | if (!allow) |
| 795 | break; |
| 796 | |
| 797 | if (!dev->cpu && |
| 798 | msm_rpm_local_request_is_outstanding()) { |
| 799 | allow = false; |
| 800 | break; |
| 801 | } |
| 802 | /* fall through */ |
| 803 | |
| 804 | case MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT: |
| 805 | if (!allow) |
| 806 | break; |
| 807 | |
| 808 | rs_limits = msm_rpmrs_lowest_limits(true, |
| 809 | mode, latency_us, sleep_us); |
| 810 | |
| 811 | if (MSM_PM_DEBUG_IDLE & msm_pm_debug_mask) |
| 812 | pr_info("CPU%u: %s: %s, latency %uus, " |
| 813 | "sleep %uus, limit %p\n", |
| 814 | dev->cpu, __func__, state->desc, |
| 815 | latency_us, sleep_us, rs_limits); |
| 816 | |
| 817 | if ((MSM_PM_DEBUG_IDLE_LIMITS & msm_pm_debug_mask) && |
| 818 | rs_limits) |
| 819 | pr_info("CPU%u: %s: limit %p: " |
| 820 | "pxo %d, l2_cache %d, " |
| 821 | "vdd_mem %d, vdd_dig %d\n", |
| 822 | dev->cpu, __func__, rs_limits, |
| 823 | rs_limits->pxo, |
| 824 | rs_limits->l2_cache, |
| 825 | rs_limits->vdd_mem, |
| 826 | rs_limits->vdd_dig); |
| 827 | |
| 828 | if (!rs_limits) |
| 829 | allow = false; |
| 830 | break; |
| 831 | |
| 832 | default: |
| 833 | allow = false; |
| 834 | break; |
| 835 | } |
| 836 | |
| 837 | if (MSM_PM_DEBUG_IDLE & msm_pm_debug_mask) |
| 838 | pr_info("CPU%u: %s: allow %s: %d\n", |
| 839 | dev->cpu, __func__, state->desc, (int)allow); |
| 840 | |
| 841 | if (allow) { |
| 842 | state->flags &= ~CPUIDLE_FLAG_IGNORE; |
| 843 | state->target_residency = 0; |
| 844 | state->exit_latency = 0; |
| 845 | state->power_usage = rs_limits->power[dev->cpu]; |
| 846 | |
| 847 | if (MSM_PM_SLEEP_MODE_POWER_COLLAPSE == mode) |
| 848 | msm_pm_idle_rs_limits = rs_limits; |
| 849 | } else { |
| 850 | state->flags |= CPUIDLE_FLAG_IGNORE; |
| 851 | } |
| 852 | } |
| 853 | |
| 854 | return 0; |
| 855 | } |
| 856 | |
| 857 | int msm_pm_idle_enter(enum msm_pm_sleep_mode sleep_mode) |
| 858 | { |
| 859 | int64_t time; |
| 860 | #ifdef CONFIG_MSM_IDLE_STATS |
| 861 | int exit_stat; |
| 862 | #endif |
| 863 | |
| 864 | if (MSM_PM_DEBUG_IDLE & msm_pm_debug_mask) |
| 865 | pr_info("CPU%u: %s: mode %d\n", |
| 866 | smp_processor_id(), __func__, sleep_mode); |
| 867 | |
| 868 | time = ktime_to_ns(ktime_get()); |
| 869 | |
| 870 | switch (sleep_mode) { |
| 871 | case MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT: |
| 872 | msm_pm_swfi(); |
| 873 | #ifdef CONFIG_MSM_IDLE_STATS |
| 874 | exit_stat = MSM_PM_STAT_IDLE_WFI; |
| 875 | #endif |
| 876 | break; |
| 877 | |
| 878 | case MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE: |
| 879 | msm_pm_power_collapse_standalone(true); |
| 880 | #ifdef CONFIG_MSM_IDLE_STATS |
| 881 | exit_stat = MSM_PM_STAT_IDLE_STANDALONE_POWER_COLLAPSE; |
| 882 | #endif |
| 883 | break; |
| 884 | |
| 885 | case MSM_PM_SLEEP_MODE_POWER_COLLAPSE: { |
| 886 | int64_t timer_expiration = msm_timer_enter_idle(); |
| 887 | bool timer_halted = false; |
| 888 | uint32_t sleep_delay; |
| 889 | int ret; |
| 890 | int notify_rpm = |
| 891 | (sleep_mode == MSM_PM_SLEEP_MODE_POWER_COLLAPSE); |
Maheshkumar Sivasubramanian | dd93ecf | 2011-09-15 19:39:14 -0600 | [diff] [blame^] | 892 | int collapsed; |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 893 | |
| 894 | sleep_delay = (uint32_t) msm_pm_convert_and_cap_time( |
| 895 | timer_expiration, MSM_PM_SLEEP_TICK_LIMIT); |
| 896 | if (sleep_delay == 0) /* 0 would mean infinite time */ |
| 897 | sleep_delay = 1; |
| 898 | |
| 899 | ret = msm_rpmrs_enter_sleep( |
| 900 | sleep_delay, msm_pm_idle_rs_limits, true, notify_rpm); |
| 901 | if (!ret) { |
Maheshkumar Sivasubramanian | dd93ecf | 2011-09-15 19:39:14 -0600 | [diff] [blame^] | 902 | collapsed = msm_pm_power_collapse(true); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 903 | timer_halted = true; |
| 904 | |
| 905 | msm_rpmrs_exit_sleep(msm_pm_idle_rs_limits, true, |
Maheshkumar Sivasubramanian | dd93ecf | 2011-09-15 19:39:14 -0600 | [diff] [blame^] | 906 | notify_rpm, collapsed); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 907 | } |
| 908 | |
| 909 | msm_timer_exit_idle((int) timer_halted); |
| 910 | #ifdef CONFIG_MSM_IDLE_STATS |
| 911 | exit_stat = MSM_PM_STAT_IDLE_POWER_COLLAPSE; |
| 912 | #endif |
| 913 | break; |
| 914 | } |
| 915 | |
| 916 | default: |
| 917 | __WARN(); |
| 918 | goto cpuidle_enter_bail; |
| 919 | } |
| 920 | |
| 921 | time = ktime_to_ns(ktime_get()) - time; |
| 922 | #ifdef CONFIG_MSM_IDLE_STATS |
| 923 | msm_pm_add_stat(exit_stat, time); |
| 924 | #endif |
| 925 | |
| 926 | do_div(time, 1000); |
| 927 | return (int) time; |
| 928 | |
| 929 | cpuidle_enter_bail: |
| 930 | return 0; |
| 931 | } |
| 932 | |
| 933 | static int msm_pm_enter(suspend_state_t state) |
| 934 | { |
| 935 | bool allow[MSM_PM_SLEEP_MODE_NR]; |
| 936 | int i; |
| 937 | |
| 938 | #ifdef CONFIG_MSM_IDLE_STATS |
| 939 | int64_t period = 0; |
| 940 | int64_t time = msm_timer_get_sclk_time(&period); |
| 941 | #endif |
| 942 | |
| 943 | if (MSM_PM_DEBUG_SUSPEND & msm_pm_debug_mask) |
| 944 | pr_info("%s\n", __func__); |
| 945 | |
| 946 | if (smp_processor_id()) { |
| 947 | __WARN(); |
| 948 | goto enter_exit; |
| 949 | } |
| 950 | |
| 951 | |
| 952 | for (i = 0; i < MSM_PM_SLEEP_MODE_NR; i++) { |
| 953 | struct msm_pm_platform_data *mode; |
| 954 | |
| 955 | mode = &msm_pm_modes[MSM_PM_MODE(0, i)]; |
| 956 | allow[i] = mode->suspend_supported && mode->suspend_enabled; |
| 957 | } |
| 958 | |
| 959 | if (allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE]) { |
| 960 | struct msm_rpmrs_limits *rs_limits; |
| 961 | int ret; |
| 962 | |
| 963 | if (MSM_PM_DEBUG_SUSPEND & msm_pm_debug_mask) |
| 964 | pr_info("%s: power collapse\n", __func__); |
| 965 | |
| 966 | clock_debug_print_enabled(); |
| 967 | |
| 968 | #ifdef CONFIG_MSM_SLEEP_TIME_OVERRIDE |
| 969 | if (msm_pm_sleep_time_override > 0) { |
| 970 | int64_t ns = NSEC_PER_SEC * |
| 971 | (int64_t) msm_pm_sleep_time_override; |
| 972 | msm_pm_set_max_sleep_time(ns); |
| 973 | msm_pm_sleep_time_override = 0; |
| 974 | } |
| 975 | #endif /* CONFIG_MSM_SLEEP_TIME_OVERRIDE */ |
| 976 | |
| 977 | if (MSM_PM_DEBUG_SUSPEND_LIMITS & msm_pm_debug_mask) |
| 978 | msm_rpmrs_show_resources(); |
| 979 | |
| 980 | rs_limits = msm_rpmrs_lowest_limits(false, |
| 981 | MSM_PM_SLEEP_MODE_POWER_COLLAPSE, -1, -1); |
| 982 | |
| 983 | if ((MSM_PM_DEBUG_SUSPEND_LIMITS & msm_pm_debug_mask) && |
| 984 | rs_limits) |
| 985 | pr_info("%s: limit %p: pxo %d, l2_cache %d, " |
| 986 | "vdd_mem %d, vdd_dig %d\n", |
| 987 | __func__, rs_limits, |
| 988 | rs_limits->pxo, rs_limits->l2_cache, |
| 989 | rs_limits->vdd_mem, rs_limits->vdd_dig); |
| 990 | |
| 991 | if (rs_limits) { |
| 992 | ret = msm_rpmrs_enter_sleep( |
| 993 | msm_pm_max_sleep_time, rs_limits, false, true); |
| 994 | if (!ret) { |
Maheshkumar Sivasubramanian | dd93ecf | 2011-09-15 19:39:14 -0600 | [diff] [blame^] | 995 | int collapsed = msm_pm_power_collapse(false); |
| 996 | msm_rpmrs_exit_sleep(rs_limits, false, true, |
| 997 | collapsed); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 998 | } |
| 999 | } else { |
| 1000 | pr_err("%s: cannot find the lowest power limit\n", |
| 1001 | __func__); |
| 1002 | } |
| 1003 | |
| 1004 | #ifdef CONFIG_MSM_IDLE_STATS |
| 1005 | if (time != 0) { |
| 1006 | int64_t end_time = msm_timer_get_sclk_time(NULL); |
| 1007 | if (end_time != 0) { |
| 1008 | time = end_time - time; |
| 1009 | if (time < 0) |
| 1010 | time += period; |
| 1011 | } else |
| 1012 | time = 0; |
| 1013 | } |
| 1014 | |
| 1015 | msm_pm_add_stat(MSM_PM_STAT_SUSPEND, time); |
| 1016 | #endif /* CONFIG_MSM_IDLE_STATS */ |
| 1017 | } else if (allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE]) { |
| 1018 | if (MSM_PM_DEBUG_SUSPEND & msm_pm_debug_mask) |
| 1019 | pr_info("%s: standalone power collapse\n", __func__); |
| 1020 | msm_pm_power_collapse_standalone(false); |
| 1021 | } else if (allow[MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT]) { |
| 1022 | if (MSM_PM_DEBUG_SUSPEND & msm_pm_debug_mask) |
| 1023 | pr_info("%s: swfi\n", __func__); |
| 1024 | msm_pm_swfi(); |
| 1025 | } |
| 1026 | |
| 1027 | |
| 1028 | enter_exit: |
| 1029 | if (MSM_PM_DEBUG_SUSPEND & msm_pm_debug_mask) |
| 1030 | pr_info("%s: return\n", __func__); |
| 1031 | |
| 1032 | return 0; |
| 1033 | } |
| 1034 | |
| 1035 | static struct platform_suspend_ops msm_pm_ops = { |
| 1036 | .enter = msm_pm_enter, |
| 1037 | .valid = suspend_valid_only_mem, |
| 1038 | }; |
| 1039 | |
| 1040 | #ifdef CONFIG_HOTPLUG_CPU |
| 1041 | int platform_cpu_disable(unsigned int cpu) |
| 1042 | { |
| 1043 | return cpu == 0 ? -EPERM : 0; |
| 1044 | } |
| 1045 | |
| 1046 | int platform_cpu_kill(unsigned int cpu) |
| 1047 | { |
| 1048 | struct completion *killed = &per_cpu(msm_pm_devices, cpu).cpu_killed; |
| 1049 | return wait_for_completion_timeout(killed, HZ * 5); |
| 1050 | } |
| 1051 | |
| 1052 | void platform_cpu_die(unsigned int cpu) |
| 1053 | { |
| 1054 | bool allow[MSM_PM_SLEEP_MODE_NR]; |
| 1055 | int i; |
| 1056 | |
| 1057 | if (unlikely(cpu != smp_processor_id())) { |
| 1058 | pr_crit("%s: running on %u, should be %u\n", |
| 1059 | __func__, smp_processor_id(), cpu); |
| 1060 | BUG(); |
| 1061 | } |
| 1062 | |
| 1063 | for (i = 0; i < MSM_PM_SLEEP_MODE_NR; i++) { |
| 1064 | struct msm_pm_platform_data *mode; |
| 1065 | |
| 1066 | mode = &msm_pm_modes[MSM_PM_MODE(cpu, i)]; |
| 1067 | allow[i] = mode->suspend_supported && mode->suspend_enabled; |
| 1068 | } |
| 1069 | |
| 1070 | if (MSM_PM_DEBUG_HOTPLUG & msm_pm_debug_mask) |
| 1071 | pr_notice("CPU%u: %s: shutting down cpu\n", cpu, __func__); |
| 1072 | complete(&__get_cpu_var(msm_pm_devices).cpu_killed); |
| 1073 | |
| 1074 | flush_cache_all(); |
| 1075 | |
| 1076 | for (;;) { |
| 1077 | if (allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE]) |
| 1078 | msm_pm_power_collapse(false); |
| 1079 | else if (allow[MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE]) |
| 1080 | msm_pm_power_collapse_standalone(false); |
| 1081 | else if (allow[MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT]) |
| 1082 | msm_pm_swfi(); |
| 1083 | |
| 1084 | if (pen_release == cpu) { |
| 1085 | /* OK, proper wakeup, we're done */ |
| 1086 | break; |
| 1087 | } |
| 1088 | } |
| 1089 | |
| 1090 | pen_release = -1; |
| 1091 | pr_notice("CPU%u: %s: normal wakeup\n", cpu, __func__); |
| 1092 | } |
| 1093 | |
| 1094 | int msm_pm_platform_secondary_init(unsigned int cpu) |
| 1095 | { |
| 1096 | int ret; |
| 1097 | struct msm_pm_device *dev = &__get_cpu_var(msm_pm_devices); |
| 1098 | |
| 1099 | if (!dev->warm_boot) { |
| 1100 | dev->warm_boot = 1; |
| 1101 | return 0; |
| 1102 | } |
| 1103 | #ifdef CONFIG_VFP |
| 1104 | vfp_reinit(); |
| 1105 | #endif |
| 1106 | ret = msm_spm_set_low_power_mode(MSM_SPM_MODE_CLOCK_GATING, false); |
| 1107 | |
| 1108 | return ret; |
| 1109 | } |
| 1110 | #endif /* CONFIG_HOTPLUG_CPU */ |
| 1111 | |
| 1112 | /****************************************************************************** |
| 1113 | * Initialization routine |
| 1114 | *****************************************************************************/ |
| 1115 | |
| 1116 | static int __init msm_pm_init(void) |
| 1117 | { |
| 1118 | pgd_t *pc_pgd; |
| 1119 | pmd_t *pmd; |
| 1120 | unsigned long pmdval; |
| 1121 | unsigned int cpu; |
| 1122 | #ifdef CONFIG_MSM_IDLE_STATS |
| 1123 | struct proc_dir_entry *d_entry; |
| 1124 | #endif |
| 1125 | int ret; |
| 1126 | |
| 1127 | /* Page table for cores to come back up safely. */ |
| 1128 | pc_pgd = pgd_alloc(&init_mm); |
| 1129 | if (!pc_pgd) |
| 1130 | return -ENOMEM; |
| 1131 | |
| 1132 | pmd = pmd_offset(pc_pgd + |
| 1133 | pgd_index(virt_to_phys(msm_pm_collapse_exit)), |
| 1134 | virt_to_phys(msm_pm_collapse_exit)); |
| 1135 | pmdval = (virt_to_phys(msm_pm_collapse_exit) & PGDIR_MASK) | |
| 1136 | PMD_TYPE_SECT | PMD_SECT_AP_WRITE; |
| 1137 | pmd[0] = __pmd(pmdval); |
| 1138 | pmd[1] = __pmd(pmdval + (1 << (PGDIR_SHIFT - 1))); |
| 1139 | |
| 1140 | /* It is remotely possible that the code in msm_pm_collapse_exit() |
| 1141 | * which turns on the MMU with this mapping is in the |
| 1142 | * next even-numbered megabyte beyond the |
| 1143 | * start of msm_pm_collapse_exit(). |
| 1144 | * Map this megabyte in as well. |
| 1145 | */ |
| 1146 | pmd[2] = __pmd(pmdval + (2 << (PGDIR_SHIFT - 1))); |
| 1147 | flush_pmd_entry(pmd); |
| 1148 | msm_pm_pc_pgd = virt_to_phys(pc_pgd); |
| 1149 | |
| 1150 | ret = request_irq(rpm_cpu0_wakeup_irq, |
| 1151 | msm_pm_rpm_wakeup_interrupt, IRQF_TRIGGER_RISING, |
| 1152 | "pm_drv", msm_pm_rpm_wakeup_interrupt); |
| 1153 | if (ret) { |
| 1154 | pr_err("%s: failed to request irq %u: %d\n", |
| 1155 | __func__, rpm_cpu0_wakeup_irq, ret); |
| 1156 | return ret; |
| 1157 | } |
| 1158 | |
| 1159 | ret = irq_set_irq_wake(rpm_cpu0_wakeup_irq, 1); |
| 1160 | if (ret) { |
| 1161 | pr_err("%s: failed to set wakeup irq %u: %d\n", |
| 1162 | __func__, rpm_cpu0_wakeup_irq, ret); |
| 1163 | return ret; |
| 1164 | } |
| 1165 | |
| 1166 | for_each_possible_cpu(cpu) { |
| 1167 | struct msm_pm_device *dev = &per_cpu(msm_pm_devices, cpu); |
| 1168 | |
| 1169 | dev->cpu = cpu; |
| 1170 | #ifdef CONFIG_HOTPLUG_CPU |
| 1171 | init_completion(&dev->cpu_killed); |
| 1172 | #endif |
| 1173 | } |
| 1174 | |
| 1175 | ret = scm_set_boot_addr((void *)virt_to_phys(msm_pm_boot_entry), |
| 1176 | SCM_FLAG_WARMBOOT_CPU0 | SCM_FLAG_WARMBOOT_CPU1); |
| 1177 | if (ret) { |
| 1178 | pr_err("%s: failed to set up scm boot addr: %d\n", |
| 1179 | __func__, ret); |
| 1180 | return ret; |
| 1181 | } |
| 1182 | |
| 1183 | #ifdef CONFIG_MSM_IDLE_STATS |
| 1184 | for_each_possible_cpu(cpu) { |
| 1185 | struct msm_pm_time_stats *stats = |
| 1186 | per_cpu(msm_pm_stats, cpu).stats; |
| 1187 | |
| 1188 | stats[MSM_PM_STAT_REQUESTED_IDLE].name = "idle-request"; |
| 1189 | stats[MSM_PM_STAT_REQUESTED_IDLE].first_bucket_time = |
| 1190 | CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| 1191 | |
| 1192 | stats[MSM_PM_STAT_IDLE_WFI].name = "idle-wfi"; |
| 1193 | stats[MSM_PM_STAT_IDLE_WFI].first_bucket_time = |
| 1194 | CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| 1195 | |
| 1196 | stats[MSM_PM_STAT_IDLE_STANDALONE_POWER_COLLAPSE].name = |
| 1197 | "idle-standalone-power-collapse"; |
| 1198 | stats[MSM_PM_STAT_IDLE_STANDALONE_POWER_COLLAPSE]. |
| 1199 | first_bucket_time = CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| 1200 | |
| 1201 | stats[MSM_PM_STAT_IDLE_POWER_COLLAPSE].name = |
| 1202 | "idle-power-collapse"; |
| 1203 | stats[MSM_PM_STAT_IDLE_POWER_COLLAPSE].first_bucket_time = |
| 1204 | CONFIG_MSM_IDLE_STATS_FIRST_BUCKET; |
| 1205 | |
| 1206 | stats[MSM_PM_STAT_SUSPEND].name = "suspend"; |
| 1207 | stats[MSM_PM_STAT_SUSPEND].first_bucket_time = |
| 1208 | CONFIG_MSM_SUSPEND_STATS_FIRST_BUCKET; |
| 1209 | } |
| 1210 | |
| 1211 | d_entry = create_proc_entry("msm_pm_stats", |
| 1212 | S_IRUGO | S_IWUSR | S_IWGRP, NULL); |
| 1213 | if (d_entry) { |
| 1214 | d_entry->read_proc = msm_pm_read_proc; |
| 1215 | d_entry->write_proc = msm_pm_write_proc; |
| 1216 | d_entry->data = NULL; |
| 1217 | } |
| 1218 | #endif /* CONFIG_MSM_IDLE_STATS */ |
| 1219 | |
| 1220 | msm_pm_mode_sysfs_add(); |
| 1221 | msm_spm_allow_x_cpu_set_vdd(false); |
| 1222 | |
| 1223 | suspend_set_ops(&msm_pm_ops); |
| 1224 | msm_cpuidle_init(); |
| 1225 | |
| 1226 | return 0; |
| 1227 | } |
| 1228 | |
| 1229 | late_initcall(msm_pm_init); |