arch/arm/common/sharpsl_pm.c

   1 /*
   2  * Battery and Power Management code for the Sharp SL-C7xx and SL-Cxx00
   3  * series of PDAs
   4  *
   5  * Copyright (c) 2004-2005 Richard Purdie
   6  *
   7  * Based on code written by Sharp for 2.4 kernels
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  */
  14
  15 #undef DEBUG
  16
  17 #include <linux/module.h>
  18 #include <linux/timer.h>
  19 #include <linux/init.h>
  20 #include <linux/kernel.h>
  21 #include <linux/apm_bios.h>
  22 #include <linux/delay.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/leds.h>
  26
  27 #include <asm/hardware.h>
  28 #include <asm/mach-types.h>
  29 #include <asm/irq.h>
  30 #include <asm/apm.h>
  31 #include <asm/arch/pm.h>
  32 #include <asm/arch/pxa-regs.h>
  33 #include <asm/arch/sharpsl.h>
  34 #include <asm/hardware/sharpsl_pm.h>
  35
  36 /*
  37  * Constants
  38  */
  39 #define SHARPSL_CHARGE_ON_TIME_INTERVAL        (msecs_to_jiffies(1*60*1000))  /* 1 min */
  40 #define SHARPSL_CHARGE_FINISH_TIME             (msecs_to_jiffies(10*60*1000)) /* 10 min */
  41 #define SHARPSL_BATCHK_TIME                    (msecs_to_jiffies(15*1000))    /* 15 sec */
  42 #define SHARPSL_BATCHK_TIME_SUSPEND            (60*10)                        /* 10 min */
  43 #define SHARPSL_WAIT_CO_TIME                   15  /* 15 sec */
  44 #define SHARPSL_WAIT_DISCHARGE_ON              100 /* 100 msec */
  45 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP   10  /* 10 msec */
  46 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT   10  /* 10 msec */
  47 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN   10  /* 10 msec */
  48 #define SHARPSL_CHARGE_WAIT_TIME               15  /* 15 msec */
  49 #define SHARPSL_CHARGE_CO_CHECK_TIME           5   /* 5 msec */
  50 #define SHARPSL_CHARGE_RETRY_CNT               1   /* eqv. 10 min */
  51
  52 /*
  53  * Prototypes
  54  */
  55 static int sharpsl_off_charge_battery(void);
  56 static int sharpsl_check_battery_temp(void);
  57 static int sharpsl_check_battery_voltage(void);
  58 static int sharpsl_ac_check(void);
  59 static int sharpsl_fatal_check(void);
  60 static int sharpsl_average_value(int ad);
  61 static void sharpsl_average_clear(void);
  62 static void sharpsl_charge_toggle(void *private_);
  63 static void sharpsl_battery_thread(void *private_);
  64
  65
  66 /*
  67  * Variables
  68  */
  69 struct sharpsl_pm_status sharpsl_pm;
  70 DECLARE_WORK(toggle_charger, sharpsl_charge_toggle, NULL);
  71 DECLARE_WORK(sharpsl_bat, sharpsl_battery_thread, NULL);
  72 DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
  73
  74
  75 static int get_percentage(int voltage)
  76 {
  77         int i = sharpsl_pm.machinfo->bat_levels - 1;
  78         int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
  79         struct battery_thresh *thresh;
  80
  81         if (sharpsl_pm.charge_mode == CHRG_ON)
  82                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
  83         else
  84                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
  85
  86         while (i > 0 && (voltage > thresh[i].voltage))
  87                 i--;
  88
  89         return thresh[i].percentage;
  90 }
  91
  92 static int get_apm_status(int voltage)
  93 {
  94         int low_thresh, high_thresh;
  95
  96         if (sharpsl_pm.charge_mode == CHRG_ON) {
  97                 high_thresh = sharpsl_pm.machinfo->status_high_acin;
  98                 low_thresh = sharpsl_pm.machinfo->status_low_acin;
  99         } else {
 100                 high_thresh = sharpsl_pm.machinfo->status_high_noac;
 101                 low_thresh = sharpsl_pm.machinfo->status_low_noac;
 102         }
 103
 104         if (voltage >= high_thresh)
 105                 return APM_BATTERY_STATUS_HIGH;
 106         if (voltage >= low_thresh)
 107                 return APM_BATTERY_STATUS_LOW;
 108         return APM_BATTERY_STATUS_CRITICAL;
 109 }
 110
 111 void sharpsl_battery_kick(void)
 112 {
 113         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
 114 }
 115 EXPORT_SYMBOL(sharpsl_battery_kick);
 116
 117
 118 static void sharpsl_battery_thread(void *private_)
 119 {
 120         int voltage, percent, apm_status, i = 0;
 121
 122         if (!sharpsl_pm.machinfo)
 123                 return;
 124
 125         sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
 126
 127         /* Corgi cannot confirm when battery fully charged so periodically kick! */
 128         if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
 129                         && time_after(jiffies, sharpsl_pm.charge_start_time +  SHARPSL_CHARGE_ON_TIME_INTERVAL))
 130                 schedule_work(&toggle_charger);
 131
 132         while(1) {
 133                 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 134
 135                 if (voltage > 0) break;
 136                 if (i++ > 5) {
 137                         voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
 138                         dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
 139                         break;
 140                 }
 141         }
 142
 143         voltage = sharpsl_average_value(voltage);
 144         apm_status = get_apm_status(voltage);
 145         percent = get_percentage(voltage);
 146
 147         /* At low battery voltages, the voltage has a tendency to start
 148            creeping back up so we try to avoid this here */
 149         if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE) || (apm_status == APM_BATTERY_STATUS_HIGH) ||  percent <= sharpsl_pm.battstat.mainbat_percent) {
 150                 sharpsl_pm.battstat.mainbat_voltage = voltage;
 151                 sharpsl_pm.battstat.mainbat_status = apm_status;
 152                 sharpsl_pm.battstat.mainbat_percent = percent;
 153         }
 154
 155         dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %d\n", voltage,
 156                         sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
 157
 158         /* If battery is low. limit backlight intensity to save power. */
 159         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 160                         && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW) ||
 161                         (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
 162                 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
 163                         sharpsl_pm.machinfo->backlight_limit(1);
 164                         sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
 165                 }
 166         } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
 167                 sharpsl_pm.machinfo->backlight_limit(0);
 168                 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
 169         }
 170
 171         /* Suspend if critical battery level */
 172         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 173                         && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
 174                         && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
 175                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 176                 dev_err(sharpsl_pm.dev, "Fatal Off\n");
 177                 apm_queue_event(APM_CRITICAL_SUSPEND);
 178         }
 179
 180         schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
 181 }
 182
 183 void sharpsl_pm_led(int val)
 184 {
 185         if (val == SHARPSL_LED_ERROR) {
 186                 dev_err(sharpsl_pm.dev, "Charging Error!\n");
 187         } else if (val == SHARPSL_LED_ON) {
 188                 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
 189                 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
 190         } else {
 191                 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
 192                 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
 193         }
 194 }
 195
 196 static void sharpsl_charge_on(void)
 197 {
 198         dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
 199
 200         sharpsl_pm.full_count = 0;
 201         sharpsl_pm.charge_mode = CHRG_ON;
 202         schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
 203         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
 204 }
 205
 206 static void sharpsl_charge_off(void)
 207 {
 208         dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
 209
 210         sharpsl_pm.machinfo->charge(0);
 211         sharpsl_pm_led(SHARPSL_LED_OFF);
 212         sharpsl_pm.charge_mode = CHRG_OFF;
 213
 214         schedule_work(&sharpsl_bat);
 215 }
 216
 217 static void sharpsl_charge_error(void)
 218 {
 219         sharpsl_pm_led(SHARPSL_LED_ERROR);
 220         sharpsl_pm.machinfo->charge(0);
 221         sharpsl_pm.charge_mode = CHRG_ERROR;
 222 }
 223
 224 static void sharpsl_charge_toggle(void *private_)
 225 {
 226         dev_dbg(sharpsl_pm.dev, "Toogling Charger at time: %lx\n", jiffies);
 227
 228         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 229                 sharpsl_charge_off();
 230                 return;
 231         } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
 232                 sharpsl_charge_error();
 233                 return;
 234         }
 235
 236         sharpsl_pm_led(SHARPSL_LED_ON);
 237         sharpsl_pm.machinfo->charge(0);
 238         mdelay(SHARPSL_CHARGE_WAIT_TIME);
 239         sharpsl_pm.machinfo->charge(1);
 240
 241         sharpsl_pm.charge_start_time = jiffies;
 242 }
 243
 244 static void sharpsl_ac_timer(unsigned long data)
 245 {
 246         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 247
 248         dev_dbg(sharpsl_pm.dev, "AC Status: %d\n",acin);
 249
 250         sharpsl_average_clear();
 251         if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
 252                 sharpsl_charge_on();
 253         else if (sharpsl_pm.charge_mode == CHRG_ON)
 254                 sharpsl_charge_off();
 255
 256         schedule_work(&sharpsl_bat);
 257 }
 258
 259
 260 irqreturn_t sharpsl_ac_isr(int irq, void *dev_id, struct pt_regs *fp)
 261 {
 262         /* Delay the event slightly to debounce */
 263         /* Must be a smaller delay than the chrg_full_isr below */
 264         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 265
 266         return IRQ_HANDLED;
 267 }
 268
 269 static void sharpsl_chrg_full_timer(unsigned long data)
 270 {
 271         dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
 272
 273         sharpsl_pm.full_count++;
 274
 275         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 276                 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
 277                 if (sharpsl_pm.charge_mode == CHRG_ON)
 278                         sharpsl_charge_off();
 279         } else if (sharpsl_pm.full_count < 2) {
 280                 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
 281                 schedule_work(&toggle_charger);
 282         } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
 283                 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
 284                 schedule_work(&toggle_charger);
 285         } else {
 286                 sharpsl_charge_off();
 287                 sharpsl_pm.charge_mode = CHRG_DONE;
 288                 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
 289         }
 290 }
 291
 292 /* Charging Finished Interrupt (Not present on Corgi) */
 293 /* Can trigger at the same time as an AC staus change so
 294    delay until after that has been processed */
 295 irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id, struct pt_regs *fp)
 296 {
 297         if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
 298                 return IRQ_HANDLED;
 299
 300         /* delay until after any ac interrupt */
 301         mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
 302
 303         return IRQ_HANDLED;
 304 }
 305
 306 irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id, struct pt_regs *fp)
 307 {
 308         int is_fatal = 0;
 309
 310         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
 311                 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
 312                 is_fatal = 1;
 313         }
 314
 315         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
 316                 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
 317                 is_fatal = 1;
 318         }
 319
 320         if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
 321                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 322                 apm_queue_event(APM_CRITICAL_SUSPEND);
 323         }
 324
 325         return IRQ_HANDLED;
 326 }
 327
 328 /*
 329  * Maintain an average of the last 10 readings
 330  */
 331 #define SHARPSL_CNV_VALUE_NUM    10
 332 static int sharpsl_ad_index;
 333
 334 static void sharpsl_average_clear(void)
 335 {
 336         sharpsl_ad_index = 0;
 337 }
 338
 339 static int sharpsl_average_value(int ad)
 340 {
 341         int i, ad_val = 0;
 342         static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
 343
 344         if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
 345                 sharpsl_ad_index = 0;
 346                 return ad;
 347         }
 348
 349         sharpsl_ad[sharpsl_ad_index] = ad;
 350         sharpsl_ad_index++;
 351         if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
 352                 for (i=0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
 353                         sharpsl_ad[i] = sharpsl_ad[i+1];
 354                 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
 355         }
 356         for (i=0; i < sharpsl_ad_index; i++)
 357                 ad_val += sharpsl_ad[i];
 358
 359         return (ad_val / sharpsl_ad_index);
 360 }
 361
 362 /*
 363  * Take an array of 5 integers, remove the maximum and minimum values
 364  * and return the average.
 365  */
 366 static int get_select_val(int *val)
 367 {
 368         int i, j, k, temp, sum = 0;
 369
 370         /* Find MAX val */
 371         temp = val[0];
 372         j=0;
 373         for (i=1; i<5; i++) {
 374                 if (temp < val[i]) {
 375                         temp = val[i];
 376                         j = i;
 377                 }
 378         }
 379
 380         /* Find MIN val */
 381         temp = val[4];
 382         k=4;
 383         for (i=3; i>=0; i--) {
 384                 if (temp > val[i]) {
 385                         temp = val[i];
 386                         k = i;
 387                 }
 388         }
 389
 390         for (i=0; i<5; i++)
 391                 if (i != j && i != k )
 392                         sum += val[i];
 393
 394         dev_dbg(sharpsl_pm.dev, "Average: %d from values: %d, %d, %d, %d, %d\n", sum/3, val[0], val[1], val[2], val[3], val[4]);
 395
 396         return (sum/3);
 397 }
 398
 399 static int sharpsl_check_battery_temp(void)
 400 {
 401         int val, i, buff[5];
 402
 403         /* Check battery temperature */
 404         for (i=0; i<5; i++) {
 405                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 406                 sharpsl_pm.machinfo->measure_temp(1);
 407                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 408                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
 409                 sharpsl_pm.machinfo->measure_temp(0);
 410         }
 411
 412         val = get_select_val(buff);
 413
 414         dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
 415         if (val > sharpsl_pm.machinfo->charge_on_temp)
 416                 return -1;
 417
 418         return 0;
 419 }
 420
 421 static int sharpsl_check_battery_voltage(void)
 422 {
 423         int val, i, buff[5];
 424
 425         /* disable charge, enable discharge */
 426         sharpsl_pm.machinfo->charge(0);
 427         sharpsl_pm.machinfo->discharge(1);
 428         mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 429
 430         if (sharpsl_pm.machinfo->discharge1)
 431                 sharpsl_pm.machinfo->discharge1(1);
 432
 433         /* Check battery voltage */
 434         for (i=0; i<5; i++) {
 435                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 436                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 437         }
 438
 439         if (sharpsl_pm.machinfo->discharge1)
 440                 sharpsl_pm.machinfo->discharge1(0);
 441
 442         sharpsl_pm.machinfo->discharge(0);
 443
 444         val = get_select_val(buff);
 445         dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
 446
 447         if (val < sharpsl_pm.machinfo->charge_on_volt)
 448                 return -1;
 449
 450         return 0;
 451 }
 452
 453 static int sharpsl_ac_check(void)
 454 {
 455         int temp, i, buff[5];
 456
 457         for (i=0; i<5; i++) {
 458                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
 459                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
 460         }
 461
 462         temp = get_select_val(buff);
 463         dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n",temp);
 464
 465         if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
 466                 dev_err(sharpsl_pm.dev, "Error: AC check failed.\n");
 467                 return -1;
 468         }
 469
 470         return 0;
 471 }
 472
 473 #ifdef CONFIG_PM
 474 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
 475 {
 476         sharpsl_pm.flags |= SHARPSL_SUSPENDED;
 477         flush_scheduled_work();
 478
 479         if (sharpsl_pm.charge_mode == CHRG_ON)
 480                 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 481         else
 482                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 483
 484         return 0;
 485 }
 486
 487 static int sharpsl_pm_resume(struct platform_device *pdev)
 488 {
 489         /* Clear the reset source indicators as they break the bootloader upon reboot */
 490         RCSR = 0x0f;
 491         sharpsl_average_clear();
 492         sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
 493         sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
 494
 495         return 0;
 496 }
 497
 498 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 499 {
 500         dev_dbg(sharpsl_pm.dev, "Time is: %08x\n",RCNR);
 501
 502         dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n",sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
 503         /* not charging and AC-IN! */
 504
 505         if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
 506                 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
 507                 sharpsl_pm.charge_mode = CHRG_OFF;
 508                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 509                 sharpsl_off_charge_battery();
 510         }
 511
 512         sharpsl_pm.machinfo->presuspend();
 513
 514         PEDR = 0xffffffff; /* clear it */
 515
 516         sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
 517         if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
 518                 RTSR &= RTSR_ALE;
 519                 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
 520                 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n",RTAR);
 521                 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
 522         } else if (alarm_enable) {
 523                 RTSR &= RTSR_ALE;
 524                 RTAR = alarm_time;
 525                 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n",RTAR);
 526         } else {
 527                 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
 528         }
 529
 530         pxa_pm_enter(state);
 531
 532         sharpsl_pm.machinfo->postsuspend();
 533
 534         dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n",PEDR);
 535 }
 536
 537 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 538 {
 539         if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable) )
 540         {
 541                 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
 542                         dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
 543                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 544                         return 1;
 545                 }
 546                 if(sharpsl_off_charge_battery()) {
 547                         dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
 548                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 549                         return 1;
 550                 }
 551                 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
 552         }
 553
 554         if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) || (sharpsl_fatal_check() < 0) )
 555         {
 556                 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
 557                 corgi_goto_sleep(alarm_time, alarm_enable, state);
 558                 return 1;
 559         }
 560
 561         return 0;
 562 }
 563
 564 static int corgi_pxa_pm_enter(suspend_state_t state)
 565 {
 566         unsigned long alarm_time = RTAR;
 567         unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
 568
 569         dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
 570
 571         corgi_goto_sleep(alarm_time, alarm_status, state);
 572
 573         while (corgi_enter_suspend(alarm_time,alarm_status,state))
 574                 {}
 575
 576         dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
 577
 578         return 0;
 579 }
 580 #endif
 581
 582
 583 /*
 584  * Check for fatal battery errors
 585  * Fatal returns -1
 586  */
 587 static int sharpsl_fatal_check(void)
 588 {
 589         int buff[5], temp, i, acin;
 590
 591         dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
 592
 593         /* Check AC-Adapter */
 594         acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 595
 596         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 597                 sharpsl_pm.machinfo->charge(0);
 598                 udelay(100);
 599                 sharpsl_pm.machinfo->discharge(1);      /* enable discharge */
 600                 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 601         }
 602
 603         if (sharpsl_pm.machinfo->discharge1)
 604                 sharpsl_pm.machinfo->discharge1(1);
 605
 606         /* Check battery : check inserting battery ? */
 607         for (i=0; i<5; i++) {
 608                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 609                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 610         }
 611
 612         if (sharpsl_pm.machinfo->discharge1)
 613                 sharpsl_pm.machinfo->discharge1(0);
 614
 615         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 616                 udelay(100);
 617                 sharpsl_pm.machinfo->charge(1);
 618                 sharpsl_pm.machinfo->discharge(0);
 619         }
 620
 621         temp = get_select_val(buff);
 622         dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check: acin: %d, discharge voltage: %d, no discharge: %d\n", acin, temp, sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT));
 623
 624         if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
 625                         (!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
 626                 return -1;
 627         return 0;
 628 }
 629
 630 static int sharpsl_off_charge_error(void)
 631 {
 632         dev_err(sharpsl_pm.dev, "Offline Charger: Error occured.\n");
 633         sharpsl_pm.machinfo->charge(0);
 634         sharpsl_pm_led(SHARPSL_LED_ERROR);
 635         sharpsl_pm.charge_mode = CHRG_ERROR;
 636         return 1;
 637 }
 638
 639 /*
 640  * Charging Control while suspended
 641  * Return 1 - go straight to sleep
 642  * Return 0 - sleep or wakeup depending on other factors
 643  */
 644 static int sharpsl_off_charge_battery(void)
 645 {
 646         int time;
 647
 648         dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
 649
 650         if (sharpsl_pm.charge_mode == CHRG_OFF) {
 651                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
 652
 653                 /* AC Check */
 654                 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
 655                         return sharpsl_off_charge_error();
 656
 657                 /* Start Charging */
 658                 sharpsl_pm_led(SHARPSL_LED_ON);
 659                 sharpsl_pm.machinfo->charge(0);
 660                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 661                 sharpsl_pm.machinfo->charge(1);
 662
 663                 sharpsl_pm.charge_mode = CHRG_ON;
 664                 sharpsl_pm.full_count = 0;
 665
 666                 return 1;
 667         } else if (sharpsl_pm.charge_mode != CHRG_ON) {
 668                 return 1;
 669         }
 670
 671         if (sharpsl_pm.full_count == 0) {
 672                 int time;
 673
 674                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
 675
 676                 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
 677                         return sharpsl_off_charge_error();
 678
 679                 sharpsl_pm.machinfo->charge(0);
 680                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 681                 sharpsl_pm.machinfo->charge(1);
 682                 sharpsl_pm.charge_mode = CHRG_ON;
 683
 684                 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 685
 686                 time = RCNR;
 687                 while(1) {
 688                         /* Check if any wakeup event had occured */
 689                         if (sharpsl_pm.machinfo->charger_wakeup() != 0)
 690                                 return 0;
 691                         /* Check for timeout */
 692                         if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
 693                                 return 1;
 694                         if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 695                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occured. Retrying to check\n");
 696                                 sharpsl_pm.full_count++;
 697                                 sharpsl_pm.machinfo->charge(0);
 698                                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 699                                 sharpsl_pm.machinfo->charge(1);
 700                                 return 1;
 701                         }
 702                 }
 703         }
 704
 705         dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
 706
 707         mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 708
 709         time = RCNR;
 710         while(1) {
 711                 /* Check if any wakeup event had occured */
 712                 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
 713                         return 0;
 714                 /* Check for timeout */
 715                 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
 716                         if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
 717                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
 718                                 sharpsl_pm.full_count = 0;
 719                         }
 720                         sharpsl_pm.full_count++;
 721                         return 1;
 722                 }
 723                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 724                         dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
 725                         sharpsl_pm_led(SHARPSL_LED_OFF);
 726                         sharpsl_pm.machinfo->charge(0);
 727                         sharpsl_pm.charge_mode = CHRG_DONE;
 728                         return 1;
 729                 }
 730         }
 731 }
 732
 733
 734 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
 735 {
 736         return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_percent);
 737 }
 738
 739 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
 740 {
 741         return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_voltage);
 742 }
 743
 744 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
 745 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
 746
 747 extern void (*apm_get_power_status)(struct apm_power_info *);
 748
 749 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
 750 {
 751         info->ac_line_status = sharpsl_pm.battstat.ac_status;
 752
 753         if (sharpsl_pm.charge_mode == CHRG_ON)
 754                 info->battery_status = APM_BATTERY_STATUS_CHARGING;
 755         else
 756                 info->battery_status = sharpsl_pm.battstat.mainbat_status;
 757
 758         info->battery_flag = (1 << info->battery_status);
 759         info->battery_life = sharpsl_pm.battstat.mainbat_percent;
 760 }
 761
 762 static struct pm_ops sharpsl_pm_ops = {
 763         .pm_disk_mode   = PM_DISK_FIRMWARE,
 764         .prepare        = pxa_pm_prepare,
 765         .enter          = corgi_pxa_pm_enter,
 766         .finish         = pxa_pm_finish,
 767 };
 768
 769 static int __init sharpsl_pm_probe(struct platform_device *pdev)
 770 {
 771         if (!pdev->dev.platform_data)
 772                 return -EINVAL;
 773
 774         sharpsl_pm.dev = &pdev->dev;
 775         sharpsl_pm.machinfo = pdev->dev.platform_data;
 776         sharpsl_pm.charge_mode = CHRG_OFF;
 777         sharpsl_pm.flags = 0;
 778
 779         init_timer(&sharpsl_pm.ac_timer);
 780         sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
 781
 782         init_timer(&sharpsl_pm.chrg_full_timer);
 783         sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
 784
 785         led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
 786
 787         sharpsl_pm.machinfo->init();
 788
 789         device_create_file(&pdev->dev, &dev_attr_battery_percentage);
 790         device_create_file(&pdev->dev, &dev_attr_battery_voltage);
 791
 792         apm_get_power_status = sharpsl_apm_get_power_status;
 793
 794         pm_set_ops(&sharpsl_pm_ops);
 795
 796         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 797
 798         return 0;
 799 }
 800
 801 static int sharpsl_pm_remove(struct platform_device *pdev)
 802 {
 803         pm_set_ops(NULL);
 804
 805         device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
 806         device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
 807
 808         led_trigger_unregister_simple(sharpsl_charge_led_trigger);
 809
 810         sharpsl_pm.machinfo->exit();
 811
 812         del_timer_sync(&sharpsl_pm.chrg_full_timer);
 813         del_timer_sync(&sharpsl_pm.ac_timer);
 814
 815         return 0;
 816 }
 817
 818 static struct platform_driver sharpsl_pm_driver = {
 819         .probe          = sharpsl_pm_probe,
 820         .remove         = sharpsl_pm_remove,
 821         .suspend        = sharpsl_pm_suspend,
 822         .resume         = sharpsl_pm_resume,
 823         .driver         = {
 824                 .name           = "sharpsl-pm",
 825         },
 826 };
 827
 828 static int __devinit sharpsl_pm_init(void)
 829 {
 830         return platform_driver_register(&sharpsl_pm_driver);
 831 }
 832
 833 static void sharpsl_pm_exit(void)
 834 {
 835         platform_driver_unregister(&sharpsl_pm_driver);
 836 }
 837
 838 late_initcall(sharpsl_pm_init);
 839 module_exit(sharpsl_pm_exit);