arch/arm/mach-mt8127/mt_hotplug_mechanism.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License as published by
   4  * the Free Software Foundation; either version 2 of the License, or
   5  * (at your option) any later version.
   6  */
   7
   8 /*********************************
   9 * include
  10 **********************************/
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/cpu.h>
  15 #include <linux/earlysuspend.h>
  16 #include <linux/proc_fs.h>
  17 #include <linux/wakelock.h>
  18 #include <linux/platform_device.h>
  19 #include <asm/uaccess.h>
  20 #include <mach/hotplug.h>
  21 #include <mach/sync_write.h>
  22 #include <linux/seq_file.h>
  23
  24
  25 /*********************************
  26 * macro
  27 **********************************/
  28 #ifdef CONFIG_HAS_EARLYSUSPEND
  29 #define STATE_INIT                          0
  30 #define STATE_ENTER_EARLY_SUSPEND           1
  31 #define STATE_ENTER_LATE_RESUME             2
  32 #endif //#ifdef CONFIG_HAS_EARLYSUSPEND
  33
  34 #define FORCE_CPU_OFF_DELAYED_WORK_TIME     3 //second
  35 #define FORCE_CPU_OFF_WAKE_LOCK_TIME        5 //second
  36
  37
  38
  39 /*********************************
  40 * glabal variable
  41 **********************************/
  42 static int g_enable = 1;
  43
  44 #ifdef CONFIG_HAS_EARLYSUSPEND
  45 static int g_enable_cpu_rush_boost = 0;
  46 static int g_prev_cpu_rush_boost_enable = 0;
  47
  48 static struct early_suspend mt_hotplug_mechanism_early_suspend_handler =
  49 {
  50     .level = EARLY_SUSPEND_LEVEL_DISABLE_FB + 250,
  51     .suspend = NULL,
  52     .resume  = NULL,
  53 };
  54 static int g_cur_state = STATE_ENTER_LATE_RESUME;
  55 #endif //#ifdef CONFIG_HAS_EARLYSUSPEND
  56
  57 static int g_enable_dynamic_cpu_hotplug_at_suspend = 0;
  58 static int g_prev_dynamic_cpu_hotplug_enable = 0;
  59 static int mt_hotplug_mechanism_probe(struct platform_device *pdev);
  60 static int mt_hotplug_mechanism_suspend(struct platform_device *pdev, pm_message_t state);
  61 static int mt_hotplug_mechanism_resume(struct platform_device *pdev);
  62 static struct platform_driver mt_hotplug_mechanism_pdrv =
  63 {
  64     .remove     = NULL,
  65     .shutdown   = NULL,
  66     .probe      = mt_hotplug_mechanism_probe,
  67     .suspend    = mt_hotplug_mechanism_suspend,
  68     .resume     = mt_hotplug_mechanism_resume,
  69     .driver     = {
  70         .name = "mt_cpu_hotplug",
  71     },
  72 };
  73
  74 static int g_test0 = 0;
  75 static int g_test1 = 0;
  76
  77 /*********************************
  78 * extern function
  79 **********************************/
  80 #ifdef CONFIG_CPU_FREQ_GOV_HOTPLUG
  81 extern int hp_get_cpu_rush_boost_enable(void);
  82 extern void hp_set_cpu_rush_boost_enable(int enable);
  83 extern int hp_get_dynamic_cpu_hotplug_enable(void);
  84 extern void hp_set_dynamic_cpu_hotplug_enable(int enable);
  85 #endif
  86
  87
  88
  89 /*********************************
  90 * early suspend callback function
  91 **********************************/
  92 #ifdef CONFIG_HAS_EARLYSUSPEND
  93 static void mt_hotplug_mechanism_early_suspend(struct early_suspend *h)
  94 {
  95     HOTPLUG_INFO("mt_hotplug_mechanism_early_suspend");
  96
  97     if (!g_enable)
  98         goto early_suspend_end;
  99
 100     if (!g_enable_cpu_rush_boost)
 101     {
 102     #ifdef CONFIG_CPU_FREQ_GOV_HOTPLUG
 103         g_prev_cpu_rush_boost_enable = hp_get_cpu_rush_boost_enable();
 104         hp_set_cpu_rush_boost_enable(0);
 105     #endif //#ifdef CONFIG_CPU_FREQ_GOV_HOTPLUG
 106     }
 107
 108 early_suspend_end:
 109     g_cur_state = STATE_ENTER_EARLY_SUSPEND;
 110
 111     return;
 112 }
 113 #endif //#ifdef CONFIG_HAS_EARLYSUSPEND
 114
 115
 116
 117 /*******************************
 118 * late resume callback function
 119 ********************************/
 120 #ifdef CONFIG_HAS_EARLYSUSPEND
 121 static void mt_hotplug_mechanism_late_resume(struct early_suspend *h)
 122 {
 123     HOTPLUG_INFO("mt_hotplug_mechanism_late_resume");
 124
 125     if (!g_enable)
 126         goto late_resume_end;
 127
 128     if (!g_enable_cpu_rush_boost)
 129     {
 130     #ifdef CONFIG_CPU_FREQ_GOV_HOTPLUG
 131         hp_set_cpu_rush_boost_enable(g_prev_cpu_rush_boost_enable);
 132     #endif //#ifdef CONFIG_CPU_FREQ_GOV_HOTPLUG
 133     }
 134
 135 late_resume_end:
 136     g_cur_state = STATE_ENTER_LATE_RESUME;
 137
 138     return;
 139 }
 140 #endif //#ifdef CONFIG_HAS_EARLYSUSPEND
 141
 142
 143
 144 /*******************************
 145 * probe callback function
 146 ********************************/
 147 static int mt_hotplug_mechanism_probe(struct platform_device *pdev)
 148 {
 149     HOTPLUG_INFO("mt_hotplug_mechanism_probe\n");
 150
 151     return 0;
 152 }
 153
 154
 155
 156 /*******************************
 157 * suspend callback function
 158 ********************************/
 159 static int mt_hotplug_mechanism_suspend(struct platform_device *pdev, pm_message_t state)
 160 {
 161     HOTPLUG_INFO("mt_hotplug_mechanism_suspend\n");
 162
 163     if (!g_enable)
 164         return 0;
 165
 166     if (!g_enable_dynamic_cpu_hotplug_at_suspend)
 167     {
 168     #ifdef CONFIG_CPU_FREQ_GOV_HOTPLUG
 169         g_prev_dynamic_cpu_hotplug_enable = hp_get_dynamic_cpu_hotplug_enable();
 170         hp_set_dynamic_cpu_hotplug_enable(0);
 171     #endif //#ifdef CONFIG_CPU_FREQ_GOV_HOTPLUG
 172     }
 173
 174     return 0;
 175 }
 176
 177
 178
 179 /*******************************
 180 * resume callback function
 181 ********************************/
 182 static int mt_hotplug_mechanism_resume(struct platform_device *pdev)
 183 {
 184     HOTPLUG_INFO("mt_hotplug_mechanism_resume\n");
 185
 186     if (!g_enable)
 187         return 0;
 188
 189     if (!g_enable_dynamic_cpu_hotplug_at_suspend)
 190     {
 191     #ifdef CONFIG_CPU_FREQ_GOV_HOTPLUG
 192         hp_set_dynamic_cpu_hotplug_enable(g_prev_dynamic_cpu_hotplug_enable);
 193     #endif //#ifdef CONFIG_CPU_FREQ_GOV_HOTPLUG
 194     }
 195
 196     return 0;
 197 }
 198
 199
 200 /**************************************************************
 201 * mt hotplug mechanism control interface for procfs test0
 202 ***************************************************************/
 203 static int mt_hotplug_mechanism_test0_show(struct seq_file *s, void *v)
 204 {
 205     seq_printf(s, "%d\n", g_test0);
 206
 207     HOTPLUG_INFO("mt_hotplug_mechanism_read_test0, hotplug_cpu_count: %d\n", atomic_read(&hotplug_cpu_count));
 208     on_each_cpu((smp_call_func_t)dump_stack, NULL, 1);
 209
 210     mt65xx_reg_sync_writel(8, 0xf0200080);
 211     printk(KERN_EMERG "CPU%u, debug event: 0x%08x, debug monitor: 0x%08x\n", 0, *(volatile u32 *)(0xf0200080), *(volatile u32 *)(0xf0200084));
 212     mt65xx_reg_sync_writel(9, 0xf0200080);
 213     printk(KERN_EMERG "CPU%u, debug event: 0x%08x, debug monitor: 0x%08x\n", 1, *(volatile u32 *)(0xf0200080), *(volatile u32 *)(0xf0200084));
 214     mt65xx_reg_sync_writel(10, 0xf0200080);
 215     printk(KERN_EMERG "CPU%u, debug event: 0x%08x, debug monitor: 0x%08x\n", 2, *(volatile u32 *)(0xf0200080), *(volatile u32 *)(0xf0200084));
 216     mt65xx_reg_sync_writel(11, 0xf0200080);
 217     printk(KERN_EMERG "CPU%u, debug event: 0x%08x, debug monitor: 0x%08x\n", 3, *(volatile u32 *)(0xf0200080), *(volatile u32 *)(0xf0200084));
 218
 219     return 0;
 220 }
 221
 222 static int mt_hotplug_mechanism_test0_open(struct inode *inode, struct file *file)
 223 {
 224         return single_open(file, mt_hotplug_mechanism_test0_show, NULL);
 225 }
 226
 227 static int mt_hotplug_mechanism_test0_write(struct file *file, const char *buffer, size_t count, loff_t *data)
 228 {
 229     int len = 0, test0 = 0;
 230     char desc[32];
 231
 232     len = (count < (sizeof(desc) - 1)) ? count : (sizeof(desc) - 1);
 233     if (copy_from_user(desc, buffer, len))
 234     {
 235         return 0;
 236     }
 237     desc[len] = '\0';
 238
 239     if (sscanf(desc, "%d", &test0) == 1)
 240     {
 241         g_test0 = test0;
 242         return count;
 243     }
 244     else
 245     {
 246         HOTPLUG_INFO("mt_hotplug_mechanism_write_test0, bad argument\n");
 247     }
 248
 249     return -EINVAL;
 250 }
 251
 252 static const struct file_operations mt_hotplug_mechanism_test0_fops = {
 253         .owner = THIS_MODULE,
 254         .write = mt_hotplug_mechanism_test0_write,
 255         .open = mt_hotplug_mechanism_test0_open,
 256         .read = seq_read,
 257         .llseek = seq_lseek,
 258         .release = single_release,
 259 };
 260
 261 /**************************************************************
 262 * mt hotplug mechanism control interface for procfs test1
 263 ***************************************************************/
 264 extern int g_cpus_sum_load_current;   //set global for information purpose
 265
 266 extern long g_cpu_up_sum_load;
 267 extern int g_cpu_up_count;
 268 extern int g_cpu_up_load_index;
 269
 270 extern long g_cpu_down_sum_load;
 271 extern int g_cpu_down_count;
 272 extern int g_cpu_down_load_index;
 273
 274 typedef enum {
 275     CPU_HOTPLUG_WORK_TYPE_NONE = 0,
 276     CPU_HOTPLUG_WORK_TYPE_BASE,
 277     CPU_HOTPLUG_WORK_TYPE_LIMIT,
 278     CPU_HOTPLUG_WORK_TYPE_UP,
 279     CPU_HOTPLUG_WORK_TYPE_DOWN,
 280     CPU_HOTPLUG_WORK_TYPE_RUSH,
 281 } cpu_hotplug_work_type_t;
 282 extern cpu_hotplug_work_type_t g_trigger_hp_work;
 283
 284 extern int g_tlp_avg_current;       //set global for information purpose
 285 extern int g_tlp_avg_sum;
 286 extern int g_tlp_avg_count;
 287 extern int g_tlp_avg_index;
 288 extern int g_tlp_avg_average;
 289
 290 static int mt_hotplug_mechanism_test1_show(struct seq_file *s, void *v)
 291 {
 292     seq_printf(s, "%d\n", g_test1);
 293
 294 #if 0  /* These variables are not public in cpufreq_hotplug.c */
 295     HOTPLUG_INFO("[power/hotplug] thermal_debug_1 (%d)(%d)(%d)(%d)(%ld)(%ld)\n", g_trigger_hp_work, g_tlp_avg_average, g_tlp_avg_current,
 296         g_cpus_sum_load_current, g_cpu_up_sum_load, g_cpu_down_sum_load);
 297     HOTPLUG_INFO("[power/hotplug] thermal_debug_2 (%d)(%d)(%d)(%d)\n", g_cpu_up_count, g_cpu_up_load_index, g_cpu_down_count, g_cpu_down_load_index);
 298 #endif
 299
 300     return 0;
 301 }
 302
 303 static int mt_hotplug_mechanism_test1_open(struct inode *inode, struct file *file)
 304 {
 305         return single_open(file, mt_hotplug_mechanism_test1_show, NULL);
 306 }
 307
 308 static int mt_hotplug_mechanism_test1_write(struct file *file, const char *buffer, size_t count, loff_t *data)
 309 {
 310     int len = 0, test1 = 0;
 311     char desc[32];
 312
 313     len = (count < (sizeof(desc) - 1)) ? count : (sizeof(desc) - 1);
 314     if (copy_from_user(desc, buffer, len))
 315     {
 316         return 0;
 317     }
 318     desc[len] = '\0';
 319
 320     if (sscanf(desc, "%d", &test1) == 1)
 321     {
 322         g_test1 = test1;
 323         return count;
 324     }
 325     else
 326     {
 327         HOTPLUG_INFO("mt_hotplug_mechanism_write_test1, bad argument\n");
 328     }
 329
 330     return -EINVAL;
 331 }
 332
 333 static const struct file_operations mt_hotplug_mechanism_test1_fops = {
 334         .owner = THIS_MODULE,
 335         .write = mt_hotplug_mechanism_test1_write,
 336         .open = mt_hotplug_mechanism_test1_open,
 337         .read = seq_read,
 338         .llseek = seq_lseek,
 339         .release = single_release,
 340 };
 341
 342 /*******************************
 343 * kernel module init function
 344 ********************************/
 345 static int __init mt_hotplug_mechanism_init(void)
 346 {
 347     struct proc_dir_entry *entry = NULL;
 348     struct proc_dir_entry *mt_hotplug_dir = NULL;
 349     int r = 0;
 350
 351     HOTPLUG_INFO("mt_hotplug_mechanism_init");
 352
 353     mt_hotplug_dir = proc_mkdir("mt_hotplug", NULL);
 354     if (!mt_hotplug_dir)
 355     {
 356         HOTPLUG_INFO("mkdir /proc/mt_hotplug failed");
 357     }
 358     else
 359     {
 360         entry = proc_create("test0", S_IRUGO | S_IWUSR, mt_hotplug_dir, &mt_hotplug_mechanism_test0_fops);
 361         if (!entry)
 362         {
 363             pr_err("[%s]: mkdir /proc/mt_hotplug/test0 failed\n", __func__);
 364         }
 365         entry = proc_create("test1", S_IRUGO | S_IWUSR, mt_hotplug_dir, &mt_hotplug_mechanism_test1_fops);
 366         if (!entry)
 367         {
 368             pr_err("[%s]: mkdir /proc/mt_hotplug/test1 failed\n", __func__);
 369         }
 370     }
 371
 372 #ifdef CONFIG_HAS_EARLYSUSPEND
 373     mt_hotplug_mechanism_early_suspend_handler.suspend = mt_hotplug_mechanism_early_suspend;
 374     mt_hotplug_mechanism_early_suspend_handler.resume = mt_hotplug_mechanism_late_resume;
 375     register_early_suspend(&mt_hotplug_mechanism_early_suspend_handler);
 376 #endif //#ifdef CONFIG_HAS_EARLYSUSPEND
 377
 378     r = platform_driver_register(&mt_hotplug_mechanism_pdrv);
 379     if (r)
 380         HOTPLUG_INFO("platform_driver_register failed (%d)\n", r);
 381
 382     return r;
 383 }
 384 module_init(mt_hotplug_mechanism_init);
 385
 386
 387
 388 /*******************************
 389 * kernel module exit function
 390 ********************************/
 391 static void __exit mt_hotplug_mechanism_exit(void)
 392 {
 393     HOTPLUG_INFO("mt_hotplug_mechanism_exit");
 394 }
 395 module_exit(mt_hotplug_mechanism_exit);
 396
 397
 398
 399 /**************************************************************
 400 * mt hotplug mechanism control interface for thermal protect
 401 ***************************************************************/
 402 void mt_hotplug_mechanism_thermal_protect(int limited_cpus)
 403 {
 404     HOTPLUG_INFO("mt_hotplug_mechanism_thermal_protect\n");
 405
 406 }
 407 EXPORT_SYMBOL(mt_hotplug_mechanism_thermal_protect);
 408
 409
 410
 411 module_param(g_enable, int, 0644);
 412 #ifdef CONFIG_HAS_EARLYSUSPEND
 413 module_param(g_enable_cpu_rush_boost, int, 0644);
 414 #endif //#ifdef CONFIG_HAS_EARLYSUSPEND
 415 module_param(g_enable_dynamic_cpu_hotplug_at_suspend, int, 0644);
 416
 417
 418
 419 MODULE_DESCRIPTION("MediaTek CPU Hotplug Mechanism");
 420 MODULE_LICENSE("GPL");