git.oblomov.eu Git - linux-2.6/blob - 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 #include <linux/apm-emulation.h>
  27 #include <linux/suspend.h>
  28
  29 #include <asm/hardware.h>
  30 #include <asm/mach-types.h>
  31 #include <asm/irq.h>
  32 #include <asm/arch/pm.h>
  33 #include <asm/arch/pxa-regs.h>
  34 #include <asm/arch/sharpsl.h>
  35 #include <asm/hardware/sharpsl_pm.h>
  36
  37 /*
  38  * Constants
  39  */
  40 #define SHARPSL_CHARGE_ON_TIME_INTERVAL        (msecs_to_jiffies(1*60*1000))  /* 1 min */
  41 #define SHARPSL_CHARGE_FINISH_TIME             (msecs_to_jiffies(10*60*1000)) /* 10 min */
  42 #define SHARPSL_BATCHK_TIME                    (msecs_to_jiffies(15*1000))    /* 15 sec */
  43 #define SHARPSL_BATCHK_TIME_SUSPEND            (60*10)                        /* 10 min */
  44
  45 #define SHARPSL_WAIT_CO_TIME                   15  /* 15 sec */
  46 #define SHARPSL_WAIT_DISCHARGE_ON              100 /* 100 msec */
  47 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP   10  /* 10 msec */
  48 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT   10  /* 10 msec */
  49 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN   10  /* 10 msec */
  50 #define SHARPSL_CHARGE_WAIT_TIME               15  /* 15 msec */
  51 #define SHARPSL_CHARGE_CO_CHECK_TIME           5   /* 5 msec */
  52 #define SHARPSL_CHARGE_RETRY_CNT               1   /* eqv. 10 min */
  53
  54 /*
  55  * Prototypes
  56  */
  57 static int sharpsl_off_charge_battery(void);
  58 static int sharpsl_check_battery_temp(void);
  59 static int sharpsl_check_battery_voltage(void);
  60 static int sharpsl_ac_check(void);
  61 static int sharpsl_fatal_check(void);
  62 static int sharpsl_average_value(int ad);
  63 static void sharpsl_average_clear(void);
  64 static void sharpsl_charge_toggle(struct work_struct *private_);
  65 static void sharpsl_battery_thread(struct work_struct *private_);
  66
  67
  68 /*
  69  * Variables
  70  */
  71 struct sharpsl_pm_status sharpsl_pm;
  72 DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
  73 DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
  74 DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
  75
  76
  77 static int get_percentage(int voltage)
  78 {
  79         int i = sharpsl_pm.machinfo->bat_levels - 1;
  80         int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
  81         struct battery_thresh *thresh;
  82
  83         if (sharpsl_pm.charge_mode == CHRG_ON)
  84                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
  85         else
  86                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
  87
  88         while (i > 0 && (voltage > thresh[i].voltage))
  89                 i--;
  90
  91         return thresh[i].percentage;
  92 }
  93
  94 static int get_apm_status(int voltage)
  95 {
  96         int low_thresh, high_thresh;
  97
  98         if (sharpsl_pm.charge_mode == CHRG_ON) {
  99                 high_thresh = sharpsl_pm.machinfo->status_high_acin;
 100                 low_thresh = sharpsl_pm.machinfo->status_low_acin;
 101         } else {
 102                 high_thresh = sharpsl_pm.machinfo->status_high_noac;
 103                 low_thresh = sharpsl_pm.machinfo->status_low_noac;
 104         }
 105
 106         if (voltage >= high_thresh)
 107                 return APM_BATTERY_STATUS_HIGH;
 108         if (voltage >= low_thresh)
 109                 return APM_BATTERY_STATUS_LOW;
 110         return APM_BATTERY_STATUS_CRITICAL;
 111 }
 112
 113 void sharpsl_battery_kick(void)
 114 {
 115         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
 116 }
 117 EXPORT_SYMBOL(sharpsl_battery_kick);
 118
 119
 120 static void sharpsl_battery_thread(struct work_struct *private_)
 121 {
 122         int voltage, percent, apm_status, i = 0;
 123
 124         if (!sharpsl_pm.machinfo)
 125                 return;
 126
 127         sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
 128
 129         /* Corgi cannot confirm when battery fully charged so periodically kick! */
 130         if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
 131                         && time_after(jiffies, sharpsl_pm.charge_start_time +  SHARPSL_CHARGE_ON_TIME_INTERVAL))
 132                 schedule_delayed_work(&toggle_charger, 0);
 133
 134         while(1) {
 135                 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 136
 137                 if (voltage > 0) break;
 138                 if (i++ > 5) {
 139                         voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
 140                         dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
 141                         break;
 142                 }
 143         }
 144
 145         voltage = sharpsl_average_value(voltage);
 146         apm_status = get_apm_status(voltage);
 147         percent = get_percentage(voltage);
 148
 149         /* At low battery voltages, the voltage has a tendency to start
 150            creeping back up so we try to avoid this here */
 151         if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE) || (apm_status == APM_BATTERY_STATUS_HIGH) ||  percent <= sharpsl_pm.battstat.mainbat_percent) {
 152                 sharpsl_pm.battstat.mainbat_voltage = voltage;
 153                 sharpsl_pm.battstat.mainbat_status = apm_status;
 154                 sharpsl_pm.battstat.mainbat_percent = percent;
 155         }
 156
 157         dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
 158                         sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
 159
 160         /* If battery is low. limit backlight intensity to save power. */
 161         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 162                         && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW) ||
 163                         (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
 164                 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
 165                         sharpsl_pm.machinfo->backlight_limit(1);
 166                         sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
 167                 }
 168         } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
 169                 sharpsl_pm.machinfo->backlight_limit(0);
 170                 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
 171         }
 172
 173         /* Suspend if critical battery level */
 174         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 175                         && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
 176                         && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
 177                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 178                 dev_err(sharpsl_pm.dev, "Fatal Off\n");
 179                 apm_queue_event(APM_CRITICAL_SUSPEND);
 180         }
 181
 182         schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
 183 }
 184
 185 void sharpsl_pm_led(int val)
 186 {
 187         if (val == SHARPSL_LED_ERROR) {
 188                 dev_err(sharpsl_pm.dev, "Charging Error!\n");
 189         } else if (val == SHARPSL_LED_ON) {
 190                 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
 191                 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
 192         } else {
 193                 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
 194                 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
 195         }
 196 }
 197
 198 static void sharpsl_charge_on(void)
 199 {
 200         dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
 201
 202         sharpsl_pm.full_count = 0;
 203         sharpsl_pm.charge_mode = CHRG_ON;
 204         schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
 205         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
 206 }
 207
 208 static void sharpsl_charge_off(void)
 209 {
 210         dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
 211
 212         sharpsl_pm.machinfo->charge(0);
 213         sharpsl_pm_led(SHARPSL_LED_OFF);
 214         sharpsl_pm.charge_mode = CHRG_OFF;
 215
 216         schedule_delayed_work(&sharpsl_bat, 0);
 217 }
 218
 219 static void sharpsl_charge_error(void)
 220 {
 221         sharpsl_pm_led(SHARPSL_LED_ERROR);
 222         sharpsl_pm.machinfo->charge(0);
 223         sharpsl_pm.charge_mode = CHRG_ERROR;
 224 }
 225
 226 static void sharpsl_charge_toggle(struct work_struct *private_)
 227 {
 228         dev_dbg(sharpsl_pm.dev, "Toogling Charger at time: %lx\n", jiffies);
 229
 230         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 231                 sharpsl_charge_off();
 232                 return;
 233         } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
 234                 sharpsl_charge_error();
 235                 return;
 236         }
 237
 238         sharpsl_pm_led(SHARPSL_LED_ON);
 239         sharpsl_pm.machinfo->charge(0);
 240         mdelay(SHARPSL_CHARGE_WAIT_TIME);
 241         sharpsl_pm.machinfo->charge(1);
 242
 243         sharpsl_pm.charge_start_time = jiffies;
 244 }
 245
 246 static void sharpsl_ac_timer(unsigned long data)
 247 {
 248         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 249
 250         dev_dbg(sharpsl_pm.dev, "AC Status: %d\n",acin);
 251
 252         sharpsl_average_clear();
 253         if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
 254                 sharpsl_charge_on();
 255         else if (sharpsl_pm.charge_mode == CHRG_ON)
 256                 sharpsl_charge_off();
 257
 258         schedule_delayed_work(&sharpsl_bat, 0);
 259 }
 260
 261
 262 irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
 263 {
 264         /* Delay the event slightly to debounce */
 265         /* Must be a smaller delay than the chrg_full_isr below */
 266         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 267
 268         return IRQ_HANDLED;
 269 }
 270
 271 static void sharpsl_chrg_full_timer(unsigned long data)
 272 {
 273         dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
 274
 275         sharpsl_pm.full_count++;
 276
 277         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 278                 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
 279                 if (sharpsl_pm.charge_mode == CHRG_ON)
 280                         sharpsl_charge_off();
 281         } else if (sharpsl_pm.full_count < 2) {
 282                 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
 283                 schedule_delayed_work(&toggle_charger, 0);
 284         } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
 285                 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
 286                 schedule_delayed_work(&toggle_charger, 0);
 287         } else {
 288                 sharpsl_charge_off();
 289                 sharpsl_pm.charge_mode = CHRG_DONE;
 290                 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
 291         }
 292 }
 293
 294 /* Charging Finished Interrupt (Not present on Corgi) */
 295 /* Can trigger at the same time as an AC status change so
 296    delay until after that has been processed */
 297 irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
 298 {
 299         if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
 300                 return IRQ_HANDLED;
 301
 302         /* delay until after any ac interrupt */
 303         mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
 304
 305         return IRQ_HANDLED;
 306 }
 307
 308 irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
 309 {
 310         int is_fatal = 0;
 311
 312         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
 313                 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
 314                 is_fatal = 1;
 315         }
 316
 317         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
 318                 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
 319                 is_fatal = 1;
 320         }
 321
 322         if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
 323                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 324                 apm_queue_event(APM_CRITICAL_SUSPEND);
 325         }
 326
 327         return IRQ_HANDLED;
 328 }
 329
 330 /*
 331  * Maintain an average of the last 10 readings
 332  */
 333 #define SHARPSL_CNV_VALUE_NUM    10
 334 static int sharpsl_ad_index;
 335
 336 static void sharpsl_average_clear(void)
 337 {
 338         sharpsl_ad_index = 0;
 339 }
 340
 341 static int sharpsl_average_value(int ad)
 342 {
 343         int i, ad_val = 0;
 344         static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
 345
 346         if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
 347                 sharpsl_ad_index = 0;
 348                 return ad;
 349         }
 350
 351         sharpsl_ad[sharpsl_ad_index] = ad;
 352         sharpsl_ad_index++;
 353         if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
 354                 for (i=0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
 355                         sharpsl_ad[i] = sharpsl_ad[i+1];
 356                 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
 357         }
 358         for (i=0; i < sharpsl_ad_index; i++)
 359                 ad_val += sharpsl_ad[i];
 360
 361         return (ad_val / sharpsl_ad_index);
 362 }
 363
 364 /*
 365  * Take an array of 5 integers, remove the maximum and minimum values
 366  * and return the average.
 367  */
 368 static int get_select_val(int *val)
 369 {
 370         int i, j, k, temp, sum = 0;
 371
 372         /* Find MAX val */
 373         temp = val[0];
 374         j=0;
 375         for (i=1; i<5; i++) {
 376                 if (temp < val[i]) {
 377                         temp = val[i];
 378                         j = i;
 379                 }
 380         }
 381
 382         /* Find MIN val */
 383         temp = val[4];
 384         k=4;
 385         for (i=3; i>=0; i--) {
 386                 if (temp > val[i]) {
 387                         temp = val[i];
 388                         k = i;
 389                 }
 390         }
 391
 392         for (i=0; i<5; i++)
 393                 if (i != j && i != k )
 394                         sum += val[i];
 395
 396         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]);
 397
 398         return (sum/3);
 399 }
 400
 401 static int sharpsl_check_battery_temp(void)
 402 {
 403         int val, i, buff[5];
 404
 405         /* Check battery temperature */
 406         for (i=0; i<5; i++) {
 407                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 408                 sharpsl_pm.machinfo->measure_temp(1);
 409                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 410                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
 411                 sharpsl_pm.machinfo->measure_temp(0);
 412         }
 413
 414         val = get_select_val(buff);
 415
 416         dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
 417         if (val > sharpsl_pm.machinfo->charge_on_temp) {
 418                 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
 419                 return -1;
 420         }
 421
 422         return 0;
 423 }
 424
 425 static int sharpsl_check_battery_voltage(void)
 426 {
 427         int val, i, buff[5];
 428
 429         /* disable charge, enable discharge */
 430         sharpsl_pm.machinfo->charge(0);
 431         sharpsl_pm.machinfo->discharge(1);
 432         mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 433
 434         if (sharpsl_pm.machinfo->discharge1)
 435                 sharpsl_pm.machinfo->discharge1(1);
 436
 437         /* Check battery voltage */
 438         for (i=0; i<5; i++) {
 439                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 440                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 441         }
 442
 443         if (sharpsl_pm.machinfo->discharge1)
 444                 sharpsl_pm.machinfo->discharge1(0);
 445
 446         sharpsl_pm.machinfo->discharge(0);
 447
 448         val = get_select_val(buff);
 449         dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
 450
 451         if (val < sharpsl_pm.machinfo->charge_on_volt)
 452                 return -1;
 453
 454         return 0;
 455 }
 456
 457 static int sharpsl_ac_check(void)
 458 {
 459         int temp, i, buff[5];
 460
 461         for (i=0; i<5; i++) {
 462                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
 463                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
 464         }
 465
 466         temp = get_select_val(buff);
 467         dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n",temp);
 468
 469         if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
 470                 dev_err(sharpsl_pm.dev, "Error: AC check failed.\n");
 471                 return -1;
 472         }
 473
 474         return 0;
 475 }
 476
 477 #ifdef CONFIG_PM
 478 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
 479 {
 480         sharpsl_pm.flags |= SHARPSL_SUSPENDED;
 481         flush_scheduled_work();
 482
 483         if (sharpsl_pm.charge_mode == CHRG_ON)
 484                 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 485         else
 486                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 487
 488         return 0;
 489 }
 490
 491 static int sharpsl_pm_resume(struct platform_device *pdev)
 492 {
 493         /* Clear the reset source indicators as they break the bootloader upon reboot */
 494         RCSR = 0x0f;
 495         sharpsl_average_clear();
 496         sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
 497         sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
 498
 499         return 0;
 500 }
 501
 502 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 503 {
 504         dev_dbg(sharpsl_pm.dev, "Time is: %08x\n",RCNR);
 505
 506         dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n",sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
 507         /* not charging and AC-IN! */
 508
 509         if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
 510                 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
 511                 sharpsl_pm.charge_mode = CHRG_OFF;
 512                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 513                 sharpsl_off_charge_battery();
 514         }
 515
 516         sharpsl_pm.machinfo->presuspend();
 517
 518         PEDR = 0xffffffff; /* clear it */
 519
 520         sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
 521         if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
 522                 RTSR &= RTSR_ALE;
 523                 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
 524                 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n",RTAR);
 525                 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
 526         } else if (alarm_enable) {
 527                 RTSR &= RTSR_ALE;
 528                 RTAR = alarm_time;
 529                 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n",RTAR);
 530         } else {
 531                 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
 532         }
 533
 534         pxa_pm_enter(state);
 535
 536         sharpsl_pm.machinfo->postsuspend();
 537
 538         dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n",PEDR);
 539 }
 540
 541 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 542 {
 543         if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable) )
 544         {
 545                 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
 546                         dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
 547                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 548                         return 1;
 549                 }
 550                 if(sharpsl_off_charge_battery()) {
 551                         dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
 552                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 553                         return 1;
 554                 }
 555                 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
 556         }
 557
 558         if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) || (sharpsl_fatal_check() < 0) )
 559         {
 560                 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
 561                 corgi_goto_sleep(alarm_time, alarm_enable, state);
 562                 return 1;
 563         }
 564
 565         return 0;
 566 }
 567
 568 static int corgi_pxa_pm_enter(suspend_state_t state)
 569 {
 570         unsigned long alarm_time = RTAR;
 571         unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
 572
 573         dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
 574
 575         corgi_goto_sleep(alarm_time, alarm_status, state);
 576
 577         while (corgi_enter_suspend(alarm_time,alarm_status,state))
 578                 {}
 579
 580         if (sharpsl_pm.machinfo->earlyresume)
 581                 sharpsl_pm.machinfo->earlyresume();
 582
 583         dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
 584
 585         return 0;
 586 }
 587 #endif
 588
 589
 590 /*
 591  * Check for fatal battery errors
 592  * Fatal returns -1
 593  */
 594 static int sharpsl_fatal_check(void)
 595 {
 596         int buff[5], temp, i, acin;
 597
 598         dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
 599
 600         /* Check AC-Adapter */
 601         acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 602
 603         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 604                 sharpsl_pm.machinfo->charge(0);
 605                 udelay(100);
 606                 sharpsl_pm.machinfo->discharge(1);      /* enable discharge */
 607                 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 608         }
 609
 610         if (sharpsl_pm.machinfo->discharge1)
 611                 sharpsl_pm.machinfo->discharge1(1);
 612
 613         /* Check battery : check inserting battery ? */
 614         for (i=0; i<5; i++) {
 615                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 616                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 617         }
 618
 619         if (sharpsl_pm.machinfo->discharge1)
 620                 sharpsl_pm.machinfo->discharge1(0);
 621
 622         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 623                 udelay(100);
 624                 sharpsl_pm.machinfo->charge(1);
 625                 sharpsl_pm.machinfo->discharge(0);
 626         }
 627
 628         temp = get_select_val(buff);
 629         dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check: acin: %d, discharge voltage: %d, no discharge: %ld\n", acin, temp, sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT));
 630
 631         if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
 632                         (!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
 633                 return -1;
 634         return 0;
 635 }
 636
 637 static int sharpsl_off_charge_error(void)
 638 {
 639         dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
 640         sharpsl_pm.machinfo->charge(0);
 641         sharpsl_pm_led(SHARPSL_LED_ERROR);
 642         sharpsl_pm.charge_mode = CHRG_ERROR;
 643         return 1;
 644 }
 645
 646 /*
 647  * Charging Control while suspended
 648  * Return 1 - go straight to sleep
 649  * Return 0 - sleep or wakeup depending on other factors
 650  */
 651 static int sharpsl_off_charge_battery(void)
 652 {
 653         int time;
 654
 655         dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
 656
 657         if (sharpsl_pm.charge_mode == CHRG_OFF) {
 658                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
 659
 660                 /* AC Check */
 661                 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
 662                         return sharpsl_off_charge_error();
 663
 664                 /* Start Charging */
 665                 sharpsl_pm_led(SHARPSL_LED_ON);
 666                 sharpsl_pm.machinfo->charge(0);
 667                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 668                 sharpsl_pm.machinfo->charge(1);
 669
 670                 sharpsl_pm.charge_mode = CHRG_ON;
 671                 sharpsl_pm.full_count = 0;
 672
 673                 return 1;
 674         } else if (sharpsl_pm.charge_mode != CHRG_ON) {
 675                 return 1;
 676         }
 677
 678         if (sharpsl_pm.full_count == 0) {
 679                 int time;
 680
 681                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
 682
 683                 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
 684                         return sharpsl_off_charge_error();
 685
 686                 sharpsl_pm.machinfo->charge(0);
 687                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 688                 sharpsl_pm.machinfo->charge(1);
 689                 sharpsl_pm.charge_mode = CHRG_ON;
 690
 691                 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 692
 693                 time = RCNR;
 694                 while(1) {
 695                         /* Check if any wakeup event had occurred */
 696                         if (sharpsl_pm.machinfo->charger_wakeup() != 0)
 697                                 return 0;
 698                         /* Check for timeout */
 699                         if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
 700                                 return 1;
 701                         if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 702                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
 703                                 sharpsl_pm.full_count++;
 704                                 sharpsl_pm.machinfo->charge(0);
 705                                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 706                                 sharpsl_pm.machinfo->charge(1);
 707                                 return 1;
 708                         }
 709                 }
 710         }
 711
 712         dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
 713
 714         mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 715
 716         time = RCNR;
 717         while(1) {
 718                 /* Check if any wakeup event had occurred */
 719                 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
 720                         return 0;
 721                 /* Check for timeout */
 722                 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
 723                         if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
 724                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
 725                                 sharpsl_pm.full_count = 0;
 726                         }
 727                         sharpsl_pm.full_count++;
 728                         return 1;
 729                 }
 730                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 731                         dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
 732                         sharpsl_pm_led(SHARPSL_LED_OFF);
 733                         sharpsl_pm.machinfo->charge(0);
 734                         sharpsl_pm.charge_mode = CHRG_DONE;
 735                         return 1;
 736                 }
 737         }
 738 }
 739
 740
 741 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
 742 {
 743         return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_percent);
 744 }
 745
 746 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
 747 {
 748         return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_voltage);
 749 }
 750
 751 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
 752 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
 753
 754 extern void (*apm_get_power_status)(struct apm_power_info *);
 755
 756 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
 757 {
 758         info->ac_line_status = sharpsl_pm.battstat.ac_status;
 759
 760         if (sharpsl_pm.charge_mode == CHRG_ON)
 761                 info->battery_status = APM_BATTERY_STATUS_CHARGING;
 762         else
 763                 info->battery_status = sharpsl_pm.battstat.mainbat_status;
 764
 765         info->battery_flag = (1 << info->battery_status);
 766         info->battery_life = sharpsl_pm.battstat.mainbat_percent;
 767 }
 768
 769 static struct platform_suspend_ops sharpsl_pm_ops = {
 770         .enter          = corgi_pxa_pm_enter,
 771         .valid          = suspend_valid_only_mem,
 772 };
 773
 774 static int __init sharpsl_pm_probe(struct platform_device *pdev)
 775 {
 776         int ret;
 777
 778         if (!pdev->dev.platform_data)
 779                 return -EINVAL;
 780
 781         sharpsl_pm.dev = &pdev->dev;
 782         sharpsl_pm.machinfo = pdev->dev.platform_data;
 783         sharpsl_pm.charge_mode = CHRG_OFF;
 784         sharpsl_pm.flags = 0;
 785
 786         init_timer(&sharpsl_pm.ac_timer);
 787         sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
 788
 789         init_timer(&sharpsl_pm.chrg_full_timer);
 790         sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
 791
 792         led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
 793
 794         sharpsl_pm.machinfo->init();
 795
 796         ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
 797         ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
 798         if (ret != 0)
 799                 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
 800
 801         apm_get_power_status = sharpsl_apm_get_power_status;
 802
 803         suspend_set_ops(&sharpsl_pm_ops);
 804
 805         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 806
 807         return 0;
 808 }
 809
 810 static int sharpsl_pm_remove(struct platform_device *pdev)
 811 {
 812         suspend_set_ops(NULL);
 813
 814         device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
 815         device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
 816
 817         led_trigger_unregister_simple(sharpsl_charge_led_trigger);
 818
 819         sharpsl_pm.machinfo->exit();
 820
 821         del_timer_sync(&sharpsl_pm.chrg_full_timer);
 822         del_timer_sync(&sharpsl_pm.ac_timer);
 823
 824         return 0;
 825 }
 826
 827 static struct platform_driver sharpsl_pm_driver = {
 828         .probe          = sharpsl_pm_probe,
 829         .remove         = sharpsl_pm_remove,
 830         .suspend        = sharpsl_pm_suspend,
 831         .resume         = sharpsl_pm_resume,
 832         .driver         = {
 833                 .name           = "sharpsl-pm",
 834         },
 835 };
 836
 837 static int __devinit sharpsl_pm_init(void)
 838 {
 839         return platform_driver_register(&sharpsl_pm_driver);
 840 }
 841
 842 static void sharpsl_pm_exit(void)
 843 {
 844         platform_driver_unregister(&sharpsl_pm_driver);
 845 }
 846
 847 late_initcall(sharpsl_pm_init);
 848 module_exit(sharpsl_pm_exit);