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 #define SHARPSL_CHARGE_ON_VOLT         0x99  /* 2.9V */
  53 #define SHARPSL_CHARGE_ON_TEMP         0xe0  /* 2.9V */
  54 #define SHARPSL_CHARGE_ON_ACIN_HIGH    0x9b  /* 6V */
  55 #define SHARPSL_CHARGE_ON_ACIN_LOW     0x34  /* 2V */
  56 #define SHARPSL_FATAL_ACIN_VOLT        182   /* 3.45V */
  57 #define SHARPSL_FATAL_NOACIN_VOLT      170   /* 3.40V */
  58
  59 /*
  60  * Prototypes
  61  */
  62 static int sharpsl_off_charge_battery(void);
  63 static int sharpsl_check_battery_temp(void);
  64 static int sharpsl_check_battery_voltage(void);
  65 static int sharpsl_ac_check(void);
  66 static int sharpsl_fatal_check(void);
  67 static int sharpsl_average_value(int ad);
  68 static void sharpsl_average_clear(void);
  69 static void sharpsl_charge_toggle(void *private_);
  70 static void sharpsl_battery_thread(void *private_);
  71
  72
  73 /*
  74  * Variables
  75  */
  76 struct sharpsl_pm_status sharpsl_pm;
  77 DECLARE_WORK(toggle_charger, sharpsl_charge_toggle, NULL);
  78 DECLARE_WORK(sharpsl_bat, sharpsl_battery_thread, NULL);
  79 DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
  80
  81
  82 static int get_percentage(int voltage)
  83 {
  84         int i = sharpsl_pm.machinfo->bat_levels - 1;
  85         struct battery_thresh *thresh;
  86
  87         if (sharpsl_pm.charge_mode == CHRG_ON)
  88                 thresh=sharpsl_pm.machinfo->bat_levels_acin;
  89         else
  90                 thresh=sharpsl_pm.machinfo->bat_levels_noac;
  91
  92         while (i > 0 && (voltage > thresh[i].voltage))
  93                 i--;
  94
  95         return thresh[i].percentage;
  96 }
  97
  98 static int get_apm_status(int voltage)
  99 {
 100         int low_thresh, high_thresh;
 101
 102         if (sharpsl_pm.charge_mode == CHRG_ON) {
 103                 high_thresh = sharpsl_pm.machinfo->status_high_acin;
 104                 low_thresh = sharpsl_pm.machinfo->status_low_acin;
 105         } else {
 106                 high_thresh = sharpsl_pm.machinfo->status_high_noac;
 107                 low_thresh = sharpsl_pm.machinfo->status_low_noac;
 108         }
 109
 110         if (voltage >= high_thresh)
 111                 return APM_BATTERY_STATUS_HIGH;
 112         if (voltage >= low_thresh)
 113                 return APM_BATTERY_STATUS_LOW;
 114         return APM_BATTERY_STATUS_CRITICAL;
 115 }
 116
 117 void sharpsl_battery_kick(void)
 118 {
 119         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
 120 }
 121 EXPORT_SYMBOL(sharpsl_battery_kick);
 122
 123
 124 static void sharpsl_battery_thread(void *private_)
 125 {
 126         int voltage, percent, apm_status, i = 0;
 127
 128         if (!sharpsl_pm.machinfo)
 129                 return;
 130
 131         sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
 132
 133         /* Corgi cannot confirm when battery fully charged so periodically kick! */
 134         if (machine_is_corgi() && (sharpsl_pm.charge_mode == CHRG_ON)
 135                         && time_after(jiffies, sharpsl_pm.charge_start_time +  SHARPSL_CHARGE_ON_TIME_INTERVAL))
 136                 schedule_work(&toggle_charger);
 137
 138         while(1) {
 139                 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 140
 141                 if (voltage > 0) break;
 142                 if (i++ > 5) {
 143                         voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
 144                         dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
 145                         break;
 146                 }
 147         }
 148
 149         voltage = sharpsl_average_value(voltage);
 150         apm_status = get_apm_status(voltage);
 151         percent = get_percentage(voltage);
 152
 153         /* At low battery voltages, the voltage has a tendency to start
 154            creeping back up so we try to avoid this here */
 155         if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE) || (apm_status == APM_BATTERY_STATUS_HIGH) ||  percent <= sharpsl_pm.battstat.mainbat_percent) {
 156                 sharpsl_pm.battstat.mainbat_voltage = voltage;
 157                 sharpsl_pm.battstat.mainbat_status = apm_status;
 158                 sharpsl_pm.battstat.mainbat_percent = percent;
 159         }
 160
 161         dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %d\n", voltage,
 162                         sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
 163
 164         /* If battery is low. limit backlight intensity to save power. */
 165         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 166                         && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW) ||
 167                         (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
 168                 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
 169                         corgibl_limit_intensity(1);
 170                         sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
 171                 }
 172         } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
 173                 corgibl_limit_intensity(0);
 174                 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
 175         }
 176
 177         /* Suspend if critical battery level */
 178         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 179                         && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
 180                         && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
 181                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 182                 dev_err(sharpsl_pm.dev, "Fatal Off\n");
 183                 apm_queue_event(APM_CRITICAL_SUSPEND);
 184         }
 185
 186         schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
 187 }
 188
 189 void sharpsl_pm_led(int val)
 190 {
 191         if (val == SHARPSL_LED_ERROR) {
 192                 dev_err(sharpsl_pm.dev, "Charging Error!\n");
 193         } else if (val == SHARPSL_LED_ON) {
 194                 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
 195                 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
 196         } else {
 197                 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
 198                 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
 199         }
 200 }
 201
 202 static void sharpsl_charge_on(void)
 203 {
 204         dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
 205
 206         sharpsl_pm.full_count = 0;
 207         sharpsl_pm.charge_mode = CHRG_ON;
 208         schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
 209         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
 210 }
 211
 212 static void sharpsl_charge_off(void)
 213 {
 214         dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
 215
 216         sharpsl_pm.machinfo->charge(0);
 217         sharpsl_pm_led(SHARPSL_LED_OFF);
 218         sharpsl_pm.charge_mode = CHRG_OFF;
 219
 220         schedule_work(&sharpsl_bat);
 221 }
 222
 223 static void sharpsl_charge_error(void)
 224 {
 225         sharpsl_pm_led(SHARPSL_LED_ERROR);
 226         sharpsl_pm.machinfo->charge(0);
 227         sharpsl_pm.charge_mode = CHRG_ERROR;
 228 }
 229
 230 static void sharpsl_charge_toggle(void *private_)
 231 {
 232         dev_dbg(sharpsl_pm.dev, "Toogling Charger at time: %lx\n", jiffies);
 233
 234         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 235                 sharpsl_charge_off();
 236                 return;
 237         } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
 238                 sharpsl_charge_error();
 239                 return;
 240         }
 241
 242         sharpsl_pm_led(SHARPSL_LED_ON);
 243         sharpsl_pm.machinfo->charge(0);
 244         mdelay(SHARPSL_CHARGE_WAIT_TIME);
 245         sharpsl_pm.machinfo->charge(1);
 246
 247         sharpsl_pm.charge_start_time = jiffies;
 248 }
 249
 250 static void sharpsl_ac_timer(unsigned long data)
 251 {
 252         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 253
 254         dev_dbg(sharpsl_pm.dev, "AC Status: %d\n",acin);
 255
 256         sharpsl_average_clear();
 257         if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
 258                 sharpsl_charge_on();
 259         else if (sharpsl_pm.charge_mode == CHRG_ON)
 260                 sharpsl_charge_off();
 261
 262         schedule_work(&sharpsl_bat);
 263 }
 264
 265
 266 irqreturn_t sharpsl_ac_isr(int irq, void *dev_id, struct pt_regs *fp)
 267 {
 268         /* Delay the event slightly to debounce */
 269         /* Must be a smaller delay than the chrg_full_isr below */
 270         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 271
 272         return IRQ_HANDLED;
 273 }
 274
 275 static void sharpsl_chrg_full_timer(unsigned long data)
 276 {
 277         dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
 278
 279         sharpsl_pm.full_count++;
 280
 281         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 282                 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
 283                 if (sharpsl_pm.charge_mode == CHRG_ON)
 284                         sharpsl_charge_off();
 285         } else if (sharpsl_pm.full_count < 2) {
 286                 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
 287                 schedule_work(&toggle_charger);
 288         } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
 289                 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
 290                 schedule_work(&toggle_charger);
 291         } else {
 292                 sharpsl_charge_off();
 293                 sharpsl_pm.charge_mode = CHRG_DONE;
 294                 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
 295         }
 296 }
 297
 298 /* Charging Finished Interrupt (Not present on Corgi) */
 299 /* Can trigger at the same time as an AC staus change so
 300    delay until after that has been processed */
 301 irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id, struct pt_regs *fp)
 302 {
 303         if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
 304                 return IRQ_HANDLED;
 305
 306         /* delay until after any ac interrupt */
 307         mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
 308
 309         return IRQ_HANDLED;
 310 }
 311
 312 irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id, struct pt_regs *fp)
 313 {
 314         int is_fatal = 0;
 315
 316         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
 317                 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
 318                 is_fatal = 1;
 319         }
 320
 321         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
 322                 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
 323                 is_fatal = 1;
 324         }
 325
 326         if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
 327                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 328                 apm_queue_event(APM_CRITICAL_SUSPEND);
 329         }
 330
 331         return IRQ_HANDLED;
 332 }
 333
 334 /*
 335  * Maintain an average of the last 10 readings
 336  */
 337 #define SHARPSL_CNV_VALUE_NUM    10
 338 static int sharpsl_ad_index;
 339
 340 static void sharpsl_average_clear(void)
 341 {
 342         sharpsl_ad_index = 0;
 343 }
 344
 345 static int sharpsl_average_value(int ad)
 346 {
 347         int i, ad_val = 0;
 348         static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
 349
 350         if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
 351                 sharpsl_ad_index = 0;
 352                 return ad;
 353         }
 354
 355         sharpsl_ad[sharpsl_ad_index] = ad;
 356         sharpsl_ad_index++;
 357         if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
 358                 for (i=0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
 359                         sharpsl_ad[i] = sharpsl_ad[i+1];
 360                 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
 361         }
 362         for (i=0; i < sharpsl_ad_index; i++)
 363                 ad_val += sharpsl_ad[i];
 364
 365         return (ad_val / sharpsl_ad_index);
 366 }
 367
 368 /*
 369  * Take an array of 5 integers, remove the maximum and minimum values
 370  * and return the average.
 371  */
 372 static int get_select_val(int *val)
 373 {
 374         int i, j, k, temp, sum = 0;
 375
 376         /* Find MAX val */
 377         temp = val[0];
 378         j=0;
 379         for (i=1; i<5; i++) {
 380                 if (temp < val[i]) {
 381                         temp = val[i];
 382                         j = i;
 383                 }
 384         }
 385
 386         /* Find MIN val */
 387         temp = val[4];
 388         k=4;
 389         for (i=3; i>=0; i--) {
 390                 if (temp > val[i]) {
 391                         temp = val[i];
 392                         k = i;
 393                 }
 394         }
 395
 396         for (i=0; i<5; i++)
 397                 if (i != j && i != k )
 398                         sum += val[i];
 399
 400         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]);
 401
 402         return (sum/3);
 403 }
 404
 405 static int sharpsl_check_battery_temp(void)
 406 {
 407         int val, i, buff[5];
 408
 409         /* Check battery temperature */
 410         for (i=0; i<5; i++) {
 411                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 412                 sharpsl_pm.machinfo->measure_temp(1);
 413                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 414                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
 415                 sharpsl_pm.machinfo->measure_temp(0);
 416         }
 417
 418         val = get_select_val(buff);
 419
 420         dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
 421         if (val > SHARPSL_CHARGE_ON_TEMP)
 422                 return -1;
 423
 424         return 0;
 425 }
 426
 427 static int sharpsl_check_battery_voltage(void)
 428 {
 429         int val, i, buff[5];
 430
 431         /* disable charge, enable discharge */
 432         sharpsl_pm.machinfo->charge(0);
 433         sharpsl_pm.machinfo->discharge(1);
 434         mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 435
 436         if (sharpsl_pm.machinfo->discharge1)
 437                 sharpsl_pm.machinfo->discharge1(1);
 438
 439         /* Check battery voltage */
 440         for (i=0; i<5; i++) {
 441                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 442                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 443         }
 444
 445         if (sharpsl_pm.machinfo->discharge1)
 446                 sharpsl_pm.machinfo->discharge1(0);
 447
 448         sharpsl_pm.machinfo->discharge(0);
 449
 450         val = get_select_val(buff);
 451         dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
 452
 453         if (val < SHARPSL_CHARGE_ON_VOLT)
 454                 return -1;
 455
 456         return 0;
 457 }
 458
 459 static int sharpsl_ac_check(void)
 460 {
 461         int temp, i, buff[5];
 462
 463         for (i=0; i<5; i++) {
 464                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
 465                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
 466         }
 467
 468         temp = get_select_val(buff);
 469         dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n",temp);
 470
 471         if ((temp > SHARPSL_CHARGE_ON_ACIN_HIGH) || (temp < SHARPSL_CHARGE_ON_ACIN_LOW)) {
 472                 dev_err(sharpsl_pm.dev, "Error: AC check failed.\n");
 473                 return -1;
 474         }
 475
 476         return 0;
 477 }
 478
 479 #ifdef CONFIG_PM
 480 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
 481 {
 482         sharpsl_pm.flags |= SHARPSL_SUSPENDED;
 483         flush_scheduled_work();
 484
 485         if (sharpsl_pm.charge_mode == CHRG_ON)
 486                 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 487         else
 488                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 489
 490         return 0;
 491 }
 492
 493 static int sharpsl_pm_resume(struct platform_device *pdev)
 494 {
 495         /* Clear the reset source indicators as they break the bootloader upon reboot */
 496         RCSR = 0x0f;
 497         sharpsl_average_clear();
 498         sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
 499         sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
 500
 501         return 0;
 502 }
 503
 504 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 505 {
 506         dev_dbg(sharpsl_pm.dev, "Time is: %08x\n",RCNR);
 507
 508         dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n",sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
 509         /* not charging and AC-IN! */
 510
 511         if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
 512                 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
 513                 sharpsl_pm.charge_mode = CHRG_OFF;
 514                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 515                 sharpsl_off_charge_battery();
 516         }
 517
 518         sharpsl_pm.machinfo->presuspend();
 519
 520         PEDR = 0xffffffff; /* clear it */
 521
 522         sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
 523         if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
 524                 RTSR &= RTSR_ALE;
 525                 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
 526                 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n",RTAR);
 527                 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
 528         } else if (alarm_enable) {
 529                 RTSR &= RTSR_ALE;
 530                 RTAR = alarm_time;
 531                 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n",RTAR);
 532         } else {
 533                 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
 534         }
 535
 536         pxa_pm_enter(state);
 537
 538         sharpsl_pm.machinfo->postsuspend();
 539
 540         dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n",PEDR);
 541 }
 542
 543 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 544 {
 545         if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable) )
 546         {
 547                 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
 548                         dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
 549                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 550                         return 1;
 551                 }
 552                 if(sharpsl_off_charge_battery()) {
 553                         dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
 554                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 555                         return 1;
 556                 }
 557                 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
 558         }
 559
 560         if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) || (sharpsl_fatal_check() < 0) )
 561         {
 562                 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
 563                 corgi_goto_sleep(alarm_time, alarm_enable, state);
 564                 return 1;
 565         }
 566
 567         return 0;
 568 }
 569
 570 static int corgi_pxa_pm_enter(suspend_state_t state)
 571 {
 572         unsigned long alarm_time = RTAR;
 573         unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
 574
 575         dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
 576
 577         corgi_goto_sleep(alarm_time, alarm_status, state);
 578
 579         while (corgi_enter_suspend(alarm_time,alarm_status,state))
 580                 {}
 581
 582         dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
 583
 584         return 0;
 585 }
 586 #endif
 587
 588
 589 /*
 590  * Check for fatal battery errors
 591  * Fatal returns -1
 592  */
 593 static int sharpsl_fatal_check(void)
 594 {
 595         int buff[5], temp, i, acin;
 596
 597         dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
 598
 599         /* Check AC-Adapter */
 600         acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 601
 602         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 603                 sharpsl_pm.machinfo->charge(0);
 604                 udelay(100);
 605                 sharpsl_pm.machinfo->discharge(1);      /* enable discharge */
 606                 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 607         }
 608
 609         if (sharpsl_pm.machinfo->discharge1)
 610                 sharpsl_pm.machinfo->discharge1(1);
 611
 612         /* Check battery : check inserting battery ? */
 613         for (i=0; i<5; i++) {
 614                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 615                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 616         }
 617
 618         if (sharpsl_pm.machinfo->discharge1)
 619                 sharpsl_pm.machinfo->discharge1(0);
 620
 621         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 622                 udelay(100);
 623                 sharpsl_pm.machinfo->charge(1);
 624                 sharpsl_pm.machinfo->discharge(0);
 625         }
 626
 627         temp = get_select_val(buff);
 628         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));
 629
 630         if ((acin && (temp < SHARPSL_FATAL_ACIN_VOLT)) ||
 631                         (!acin && (temp < SHARPSL_FATAL_NOACIN_VOLT)))
 632                 return -1;
 633         return 0;
 634 }
 635
 636 static int sharpsl_off_charge_error(void)
 637 {
 638         dev_err(sharpsl_pm.dev, "Offline Charger: Error occured.\n");
 639         sharpsl_pm.machinfo->charge(0);
 640         sharpsl_pm_led(SHARPSL_LED_ERROR);
 641         sharpsl_pm.charge_mode = CHRG_ERROR;
 642         return 1;
 643 }
 644
 645 /*
 646  * Charging Control while suspended
 647  * Return 1 - go straight to sleep
 648  * Return 0 - sleep or wakeup depending on other factors
 649  */
 650 static int sharpsl_off_charge_battery(void)
 651 {
 652         int time;
 653
 654         dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
 655
 656         if (sharpsl_pm.charge_mode == CHRG_OFF) {
 657                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
 658
 659                 /* AC Check */
 660                 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
 661                         return sharpsl_off_charge_error();
 662
 663                 /* Start Charging */
 664                 sharpsl_pm_led(SHARPSL_LED_ON);
 665                 sharpsl_pm.machinfo->charge(0);
 666                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 667                 sharpsl_pm.machinfo->charge(1);
 668
 669                 sharpsl_pm.charge_mode = CHRG_ON;
 670                 sharpsl_pm.full_count = 0;
 671
 672                 return 1;
 673         } else if (sharpsl_pm.charge_mode != CHRG_ON) {
 674                 return 1;
 675         }
 676
 677         if (sharpsl_pm.full_count == 0) {
 678                 int time;
 679
 680                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
 681
 682                 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
 683                         return sharpsl_off_charge_error();
 684
 685                 sharpsl_pm.machinfo->charge(0);
 686                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 687                 sharpsl_pm.machinfo->charge(1);
 688                 sharpsl_pm.charge_mode = CHRG_ON;
 689
 690                 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 691
 692                 time = RCNR;
 693                 while(1) {
 694                         /* Check if any wakeup event had occured */
 695                         if (sharpsl_pm.machinfo->charger_wakeup() != 0)
 696                                 return 0;
 697                         /* Check for timeout */
 698                         if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
 699                                 return 1;
 700                         if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 701                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occured. Retrying to check\n");
 702                                 sharpsl_pm.full_count++;
 703                                 sharpsl_pm.machinfo->charge(0);
 704                                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 705                                 sharpsl_pm.machinfo->charge(1);
 706                                 return 1;
 707                         }
 708                 }
 709         }
 710
 711         dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
 712
 713         mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 714
 715         time = RCNR;
 716         while(1) {
 717                 /* Check if any wakeup event had occured */
 718                 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
 719                         return 0;
 720                 /* Check for timeout */
 721                 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
 722                         if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
 723                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
 724                                 sharpsl_pm.full_count = 0;
 725                         }
 726                         sharpsl_pm.full_count++;
 727                         return 1;
 728                 }
 729                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 730                         dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
 731                         sharpsl_pm_led(SHARPSL_LED_OFF);
 732                         sharpsl_pm.machinfo->charge(0);
 733                         sharpsl_pm.charge_mode = CHRG_DONE;
 734                         return 1;
 735                 }
 736         }
 737 }
 738
 739
 740 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
 741 {
 742         return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_percent);
 743 }
 744
 745 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
 746 {
 747         return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_voltage);
 748 }
 749
 750 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
 751 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
 752
 753 extern void (*apm_get_power_status)(struct apm_power_info *);
 754
 755 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
 756 {
 757         info->ac_line_status = sharpsl_pm.battstat.ac_status;
 758
 759         if (sharpsl_pm.charge_mode == CHRG_ON)
 760                 info->battery_status = APM_BATTERY_STATUS_CHARGING;
 761         else
 762                 info->battery_status = sharpsl_pm.battstat.mainbat_status;
 763
 764         info->battery_flag = (1 << info->battery_status);
 765         info->battery_life = sharpsl_pm.battstat.mainbat_percent;
 766 }
 767
 768 static struct pm_ops sharpsl_pm_ops = {
 769         .pm_disk_mode   = PM_DISK_FIRMWARE,
 770         .prepare        = pxa_pm_prepare,
 771         .enter          = corgi_pxa_pm_enter,
 772         .finish         = pxa_pm_finish,
 773 };
 774
 775 static int __init sharpsl_pm_probe(struct platform_device *pdev)
 776 {
 777         if (!pdev->dev.platform_data)
 778                 return -EINVAL;
 779
 780         sharpsl_pm.dev = &pdev->dev;
 781         sharpsl_pm.machinfo = pdev->dev.platform_data;
 782         sharpsl_pm.charge_mode = CHRG_OFF;
 783         sharpsl_pm.flags = 0;
 784
 785         init_timer(&sharpsl_pm.ac_timer);
 786         sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
 787
 788         init_timer(&sharpsl_pm.chrg_full_timer);
 789         sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
 790
 791         led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
 792
 793         sharpsl_pm.machinfo->init();
 794
 795         device_create_file(&pdev->dev, &dev_attr_battery_percentage);
 796         device_create_file(&pdev->dev, &dev_attr_battery_voltage);
 797
 798         apm_get_power_status = sharpsl_apm_get_power_status;
 799
 800         pm_set_ops(&sharpsl_pm_ops);
 801
 802         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 803
 804         return 0;
 805 }
 806
 807 static int sharpsl_pm_remove(struct platform_device *pdev)
 808 {
 809         pm_set_ops(NULL);
 810
 811         device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
 812         device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
 813
 814         led_trigger_unregister_simple(sharpsl_charge_led_trigger);
 815
 816         sharpsl_pm.machinfo->exit();
 817
 818         del_timer_sync(&sharpsl_pm.chrg_full_timer);
 819         del_timer_sync(&sharpsl_pm.ac_timer);
 820
 821         return 0;
 822 }
 823
 824 static struct platform_driver sharpsl_pm_driver = {
 825         .probe          = sharpsl_pm_probe,
 826         .remove         = sharpsl_pm_remove,
 827         .suspend        = sharpsl_pm_suspend,
 828         .resume         = sharpsl_pm_resume,
 829         .driver         = {
 830                 .name           = "sharpsl-pm",
 831         },
 832 };
 833
 834 static int __devinit sharpsl_pm_init(void)
 835 {
 836         return platform_driver_register(&sharpsl_pm_driver);
 837 }
 838
 839 static void sharpsl_pm_exit(void)
 840 {
 841         platform_driver_unregister(&sharpsl_pm_driver);
 842 }
 843
 844 late_initcall(sharpsl_pm_init);
 845 module_exit(sharpsl_pm_exit);