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                 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
 417                 return -1;
 418         }
 419
 420         return 0;
 421 }
 422
 423 static int sharpsl_check_battery_voltage(void)
 424 {
 425         int val, i, buff[5];
 426
 427         /* disable charge, enable discharge */
 428         sharpsl_pm.machinfo->charge(0);
 429         sharpsl_pm.machinfo->discharge(1);
 430         mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 431
 432         if (sharpsl_pm.machinfo->discharge1)
 433                 sharpsl_pm.machinfo->discharge1(1);
 434
 435         /* Check battery voltage */
 436         for (i=0; i<5; i++) {
 437                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 438                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 439         }
 440
 441         if (sharpsl_pm.machinfo->discharge1)
 442                 sharpsl_pm.machinfo->discharge1(0);
 443
 444         sharpsl_pm.machinfo->discharge(0);
 445
 446         val = get_select_val(buff);
 447         dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
 448
 449         if (val < sharpsl_pm.machinfo->charge_on_volt)
 450                 return -1;
 451
 452         return 0;
 453 }
 454
 455 static int sharpsl_ac_check(void)
 456 {
 457         int temp, i, buff[5];
 458
 459         for (i=0; i<5; i++) {
 460                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
 461                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
 462         }
 463
 464         temp = get_select_val(buff);
 465         dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n",temp);
 466
 467         if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
 468                 dev_err(sharpsl_pm.dev, "Error: AC check failed.\n");
 469                 return -1;
 470         }
 471
 472         return 0;
 473 }
 474
 475 #ifdef CONFIG_PM
 476 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
 477 {
 478         sharpsl_pm.flags |= SHARPSL_SUSPENDED;
 479         flush_scheduled_work();
 480
 481         if (sharpsl_pm.charge_mode == CHRG_ON)
 482                 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 483         else
 484                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 485
 486         return 0;
 487 }
 488
 489 static int sharpsl_pm_resume(struct platform_device *pdev)
 490 {
 491         /* Clear the reset source indicators as they break the bootloader upon reboot */
 492         RCSR = 0x0f;
 493         sharpsl_average_clear();
 494         sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
 495         sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
 496
 497         return 0;
 498 }
 499
 500 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 501 {
 502         dev_dbg(sharpsl_pm.dev, "Time is: %08x\n",RCNR);
 503
 504         dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n",sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
 505         /* not charging and AC-IN! */
 506
 507         if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
 508                 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
 509                 sharpsl_pm.charge_mode = CHRG_OFF;
 510                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 511                 sharpsl_off_charge_battery();
 512         }
 513
 514         sharpsl_pm.machinfo->presuspend();
 515
 516         PEDR = 0xffffffff; /* clear it */
 517
 518         sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
 519         if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
 520                 RTSR &= RTSR_ALE;
 521                 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
 522                 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n",RTAR);
 523                 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
 524         } else if (alarm_enable) {
 525                 RTSR &= RTSR_ALE;
 526                 RTAR = alarm_time;
 527                 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n",RTAR);
 528         } else {
 529                 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
 530         }
 531
 532         pxa_pm_enter(state);
 533
 534         sharpsl_pm.machinfo->postsuspend();
 535
 536         dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n",PEDR);
 537 }
 538
 539 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 540 {
 541         if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable) )
 542         {
 543                 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
 544                         dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
 545                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 546                         return 1;
 547                 }
 548                 if(sharpsl_off_charge_battery()) {
 549                         dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
 550                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 551                         return 1;
 552                 }
 553                 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
 554         }
 555
 556         if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) || (sharpsl_fatal_check() < 0) )
 557         {
 558                 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
 559                 corgi_goto_sleep(alarm_time, alarm_enable, state);
 560                 return 1;
 561         }
 562
 563         return 0;
 564 }
 565
 566 static int corgi_pxa_pm_enter(suspend_state_t state)
 567 {
 568         unsigned long alarm_time = RTAR;
 569         unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
 570
 571         dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
 572
 573         corgi_goto_sleep(alarm_time, alarm_status, state);
 574
 575         while (corgi_enter_suspend(alarm_time,alarm_status,state))
 576                 {}
 577
 578         dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
 579
 580         return 0;
 581 }
 582 #endif
 583
 584
 585 /*
 586  * Check for fatal battery errors
 587  * Fatal returns -1
 588  */
 589 static int sharpsl_fatal_check(void)
 590 {
 591         int buff[5], temp, i, acin;
 592
 593         dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
 594
 595         /* Check AC-Adapter */
 596         acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 597
 598         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 599                 sharpsl_pm.machinfo->charge(0);
 600                 udelay(100);
 601                 sharpsl_pm.machinfo->discharge(1);      /* enable discharge */
 602                 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 603         }
 604
 605         if (sharpsl_pm.machinfo->discharge1)
 606                 sharpsl_pm.machinfo->discharge1(1);
 607
 608         /* Check battery : check inserting battery ? */
 609         for (i=0; i<5; i++) {
 610                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 611                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 612         }
 613
 614         if (sharpsl_pm.machinfo->discharge1)
 615                 sharpsl_pm.machinfo->discharge1(0);
 616
 617         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 618                 udelay(100);
 619                 sharpsl_pm.machinfo->charge(1);
 620                 sharpsl_pm.machinfo->discharge(0);
 621         }
 622
 623         temp = get_select_val(buff);
 624         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));
 625
 626         if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
 627                         (!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
 628                 return -1;
 629         return 0;
 630 }
 631
 632 static int sharpsl_off_charge_error(void)
 633 {
 634         dev_err(sharpsl_pm.dev, "Offline Charger: Error occured.\n");
 635         sharpsl_pm.machinfo->charge(0);
 636         sharpsl_pm_led(SHARPSL_LED_ERROR);
 637         sharpsl_pm.charge_mode = CHRG_ERROR;
 638         return 1;
 639 }
 640
 641 /*
 642  * Charging Control while suspended
 643  * Return 1 - go straight to sleep
 644  * Return 0 - sleep or wakeup depending on other factors
 645  */
 646 static int sharpsl_off_charge_battery(void)
 647 {
 648         int time;
 649
 650         dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
 651
 652         if (sharpsl_pm.charge_mode == CHRG_OFF) {
 653                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
 654
 655                 /* AC Check */
 656                 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
 657                         return sharpsl_off_charge_error();
 658
 659                 /* Start Charging */
 660                 sharpsl_pm_led(SHARPSL_LED_ON);
 661                 sharpsl_pm.machinfo->charge(0);
 662                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 663                 sharpsl_pm.machinfo->charge(1);
 664
 665                 sharpsl_pm.charge_mode = CHRG_ON;
 666                 sharpsl_pm.full_count = 0;
 667
 668                 return 1;
 669         } else if (sharpsl_pm.charge_mode != CHRG_ON) {
 670                 return 1;
 671         }
 672
 673         if (sharpsl_pm.full_count == 0) {
 674                 int time;
 675
 676                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
 677
 678                 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
 679                         return sharpsl_off_charge_error();
 680
 681                 sharpsl_pm.machinfo->charge(0);
 682                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 683                 sharpsl_pm.machinfo->charge(1);
 684                 sharpsl_pm.charge_mode = CHRG_ON;
 685
 686                 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 687
 688                 time = RCNR;
 689                 while(1) {
 690                         /* Check if any wakeup event had occured */
 691                         if (sharpsl_pm.machinfo->charger_wakeup() != 0)
 692                                 return 0;
 693                         /* Check for timeout */
 694                         if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
 695                                 return 1;
 696                         if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 697                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occured. Retrying to check\n");
 698                                 sharpsl_pm.full_count++;
 699                                 sharpsl_pm.machinfo->charge(0);
 700                                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 701                                 sharpsl_pm.machinfo->charge(1);
 702                                 return 1;
 703                         }
 704                 }
 705         }
 706
 707         dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
 708
 709         mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 710
 711         time = RCNR;
 712         while(1) {
 713                 /* Check if any wakeup event had occured */
 714                 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
 715                         return 0;
 716                 /* Check for timeout */
 717                 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
 718                         if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
 719                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
 720                                 sharpsl_pm.full_count = 0;
 721                         }
 722                         sharpsl_pm.full_count++;
 723                         return 1;
 724                 }
 725                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 726                         dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
 727                         sharpsl_pm_led(SHARPSL_LED_OFF);
 728                         sharpsl_pm.machinfo->charge(0);
 729                         sharpsl_pm.charge_mode = CHRG_DONE;
 730                         return 1;
 731                 }
 732         }
 733 }
 734
 735
 736 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
 737 {
 738         return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_percent);
 739 }
 740
 741 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
 742 {
 743         return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_voltage);
 744 }
 745
 746 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
 747 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
 748
 749 extern void (*apm_get_power_status)(struct apm_power_info *);
 750
 751 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
 752 {
 753         info->ac_line_status = sharpsl_pm.battstat.ac_status;
 754
 755         if (sharpsl_pm.charge_mode == CHRG_ON)
 756                 info->battery_status = APM_BATTERY_STATUS_CHARGING;
 757         else
 758                 info->battery_status = sharpsl_pm.battstat.mainbat_status;
 759
 760         info->battery_flag = (1 << info->battery_status);
 761         info->battery_life = sharpsl_pm.battstat.mainbat_percent;
 762 }
 763
 764 static struct pm_ops sharpsl_pm_ops = {
 765         .pm_disk_mode   = PM_DISK_FIRMWARE,
 766         .prepare        = pxa_pm_prepare,
 767         .enter          = corgi_pxa_pm_enter,
 768         .finish         = pxa_pm_finish,
 769 };
 770
 771 static int __init sharpsl_pm_probe(struct platform_device *pdev)
 772 {
 773         if (!pdev->dev.platform_data)
 774                 return -EINVAL;
 775
 776         sharpsl_pm.dev = &pdev->dev;
 777         sharpsl_pm.machinfo = pdev->dev.platform_data;
 778         sharpsl_pm.charge_mode = CHRG_OFF;
 779         sharpsl_pm.flags = 0;
 780
 781         init_timer(&sharpsl_pm.ac_timer);
 782         sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
 783
 784         init_timer(&sharpsl_pm.chrg_full_timer);
 785         sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
 786
 787         led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
 788
 789         sharpsl_pm.machinfo->init();
 790
 791         device_create_file(&pdev->dev, &dev_attr_battery_percentage);
 792         device_create_file(&pdev->dev, &dev_attr_battery_voltage);
 793
 794         apm_get_power_status = sharpsl_apm_get_power_status;
 795
 796         pm_set_ops(&sharpsl_pm_ops);
 797
 798         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 799
 800         return 0;
 801 }
 802
 803 static int sharpsl_pm_remove(struct platform_device *pdev)
 804 {
 805         pm_set_ops(NULL);
 806
 807         device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
 808         device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
 809
 810         led_trigger_unregister_simple(sharpsl_charge_led_trigger);
 811
 812         sharpsl_pm.machinfo->exit();
 813
 814         del_timer_sync(&sharpsl_pm.chrg_full_timer);
 815         del_timer_sync(&sharpsl_pm.ac_timer);
 816
 817         return 0;
 818 }
 819
 820 static struct platform_driver sharpsl_pm_driver = {
 821         .probe          = sharpsl_pm_probe,
 822         .remove         = sharpsl_pm_remove,
 823         .suspend        = sharpsl_pm_suspend,
 824         .resume         = sharpsl_pm_resume,
 825         .driver         = {
 826                 .name           = "sharpsl-pm",
 827         },
 828 };
 829
 830 static int __devinit sharpsl_pm_init(void)
 831 {
 832         return platform_driver_register(&sharpsl_pm_driver);
 833 }
 834
 835 static void sharpsl_pm_exit(void)
 836 {
 837         platform_driver_unregister(&sharpsl_pm_driver);
 838 }
 839
 840 late_initcall(sharpsl_pm_init);
 841 module_exit(sharpsl_pm_exit);