arch/arm/mach-pxa/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/kernel.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/apm-emulation.h>
  22 #include <linux/timer.h>
  23 #include <linux/delay.h>
  24 #include <linux/leds.h>
  25 #include <linux/suspend.h>
  26 #include <linux/gpio.h>
  27
  28 #include <asm/mach-types.h>
  29 #include <mach/pm.h>
  30 #include <mach/pxa2xx-regs.h>
  31 #include <mach/regs-rtc.h>
  32 #include <mach/sharpsl.h>
  33 #include <mach/sharpsl_pm.h>
  34
  35 #include "sharpsl.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 #ifdef CONFIG_PM
  58 static int sharpsl_off_charge_battery(void);
  59 static int sharpsl_check_battery_voltage(void);
  60 static int sharpsl_fatal_check(void);
  61 #endif
  62 static int sharpsl_check_battery_temp(void);
  63 static int sharpsl_ac_check(void);
  64 static int sharpsl_average_value(int ad);
  65 static void sharpsl_average_clear(void);
  66 static void sharpsl_charge_toggle(struct work_struct *private_);
  67 static void sharpsl_battery_thread(struct work_struct *private_);
  68
  69
  70 /*
  71  * Variables
  72  */
  73 struct sharpsl_pm_status sharpsl_pm;
  74 static DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
  75 static DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
  76 DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
  77
  78
  79
  80 struct battery_thresh sharpsl_battery_levels_acin[] = {
  81         { 213, 100},
  82         { 212,  98},
  83         { 211,  95},
  84         { 210,  93},
  85         { 209,  90},
  86         { 208,  88},
  87         { 207,  85},
  88         { 206,  83},
  89         { 205,  80},
  90         { 204,  78},
  91         { 203,  75},
  92         { 202,  73},
  93         { 201,  70},
  94         { 200,  68},
  95         { 199,  65},
  96         { 198,  63},
  97         { 197,  60},
  98         { 196,  58},
  99         { 195,  55},
 100         { 194,  53},
 101         { 193,  50},
 102         { 192,  48},
 103         { 192,  45},
 104         { 191,  43},
 105         { 191,  40},
 106         { 190,  38},
 107         { 190,  35},
 108         { 189,  33},
 109         { 188,  30},
 110         { 187,  28},
 111         { 186,  25},
 112         { 185,  23},
 113         { 184,  20},
 114         { 183,  18},
 115         { 182,  15},
 116         { 181,  13},
 117         { 180,  10},
 118         { 179,   8},
 119         { 178,   5},
 120         {   0,   0},
 121 };
 122
 123 struct battery_thresh sharpsl_battery_levels_noac[] = {
 124         { 213, 100},
 125         { 212,  98},
 126         { 211,  95},
 127         { 210,  93},
 128         { 209,  90},
 129         { 208,  88},
 130         { 207,  85},
 131         { 206,  83},
 132         { 205,  80},
 133         { 204,  78},
 134         { 203,  75},
 135         { 202,  73},
 136         { 201,  70},
 137         { 200,  68},
 138         { 199,  65},
 139         { 198,  63},
 140         { 197,  60},
 141         { 196,  58},
 142         { 195,  55},
 143         { 194,  53},
 144         { 193,  50},
 145         { 192,  48},
 146         { 191,  45},
 147         { 190,  43},
 148         { 189,  40},
 149         { 188,  38},
 150         { 187,  35},
 151         { 186,  33},
 152         { 185,  30},
 153         { 184,  28},
 154         { 183,  25},
 155         { 182,  23},
 156         { 181,  20},
 157         { 180,  18},
 158         { 179,  15},
 159         { 178,  13},
 160         { 177,  10},
 161         { 176,   8},
 162         { 175,   5},
 163         {   0,   0},
 164 };
 165
 166 /* MAX1111 Commands */
 167 #define MAXCTRL_PD0      (1u << 0)
 168 #define MAXCTRL_PD1      (1u << 1)
 169 #define MAXCTRL_SGL      (1u << 2)
 170 #define MAXCTRL_UNI      (1u << 3)
 171 #define MAXCTRL_SEL_SH   4
 172 #define MAXCTRL_STR      (1u << 7)
 173
 174 /*
 175  * Read MAX1111 ADC
 176  */
 177 int sharpsl_pm_pxa_read_max1111(int channel)
 178 {
 179         /* Ugly, better move this function into another module */
 180         if (machine_is_tosa())
 181             return 0;
 182
 183 #ifdef CONFIG_CORGI_SSP_DEPRECATED
 184         return corgi_ssp_max1111_get((channel << MAXCTRL_SEL_SH) | MAXCTRL_PD0 | MAXCTRL_PD1
 185                         | MAXCTRL_SGL | MAXCTRL_UNI | MAXCTRL_STR);
 186 #else
 187         extern int max1111_read_channel(int);
 188
 189         /* max1111 accepts channels from 0-3, however,
 190          * it is encoded from 0-7 here in the code.
 191          */
 192         return max1111_read_channel(channel >> 1);
 193 #endif
 194 }
 195
 196 static int get_percentage(int voltage)
 197 {
 198         int i = sharpsl_pm.machinfo->bat_levels - 1;
 199         int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
 200         struct battery_thresh *thresh;
 201
 202         if (sharpsl_pm.charge_mode == CHRG_ON)
 203                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
 204         else
 205                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
 206
 207         while (i > 0 && (voltage > thresh[i].voltage))
 208                 i--;
 209
 210         return thresh[i].percentage;
 211 }
 212
 213 static int get_apm_status(int voltage)
 214 {
 215         int low_thresh, high_thresh;
 216
 217         if (sharpsl_pm.charge_mode == CHRG_ON) {
 218                 high_thresh = sharpsl_pm.machinfo->status_high_acin;
 219                 low_thresh = sharpsl_pm.machinfo->status_low_acin;
 220         } else {
 221                 high_thresh = sharpsl_pm.machinfo->status_high_noac;
 222                 low_thresh = sharpsl_pm.machinfo->status_low_noac;
 223         }
 224
 225         if (voltage >= high_thresh)
 226                 return APM_BATTERY_STATUS_HIGH;
 227         if (voltage >= low_thresh)
 228                 return APM_BATTERY_STATUS_LOW;
 229         return APM_BATTERY_STATUS_CRITICAL;
 230 }
 231
 232 void sharpsl_battery_kick(void)
 233 {
 234         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
 235 }
 236 EXPORT_SYMBOL(sharpsl_battery_kick);
 237
 238
 239 static void sharpsl_battery_thread(struct work_struct *private_)
 240 {
 241         int voltage, percent, apm_status, i;
 242
 243         if (!sharpsl_pm.machinfo)
 244                 return;
 245
 246         sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
 247
 248         /* Corgi cannot confirm when battery fully charged so periodically kick! */
 249         if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
 250                         && time_after(jiffies, sharpsl_pm.charge_start_time +  SHARPSL_CHARGE_ON_TIME_INTERVAL))
 251                 schedule_delayed_work(&toggle_charger, 0);
 252
 253         for (i = 0; i < 5; i++) {
 254                 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 255                 if (voltage > 0)
 256                         break;
 257         }
 258         if (voltage <= 0) {
 259                 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
 260                 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
 261         }
 262
 263         voltage = sharpsl_average_value(voltage);
 264         apm_status = get_apm_status(voltage);
 265         percent = get_percentage(voltage);
 266
 267         /* At low battery voltages, the voltage has a tendency to start
 268            creeping back up so we try to avoid this here */
 269         if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE)
 270             || (apm_status == APM_BATTERY_STATUS_HIGH)
 271             || percent <= sharpsl_pm.battstat.mainbat_percent) {
 272                 sharpsl_pm.battstat.mainbat_voltage = voltage;
 273                 sharpsl_pm.battstat.mainbat_status = apm_status;
 274                 sharpsl_pm.battstat.mainbat_percent = percent;
 275         }
 276
 277         dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
 278                         sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
 279
 280 #ifdef CONFIG_BACKLIGHT_CORGI
 281         /* If battery is low. limit backlight intensity to save power. */
 282         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 283             && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW)
 284             || (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
 285                 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
 286                         sharpsl_pm.machinfo->backlight_limit(1);
 287                         sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
 288                 }
 289         } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
 290                 sharpsl_pm.machinfo->backlight_limit(0);
 291                 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
 292         }
 293 #endif
 294
 295         /* Suspend if critical battery level */
 296         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 297              && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
 298              && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
 299                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 300                 dev_err(sharpsl_pm.dev, "Fatal Off\n");
 301                 apm_queue_event(APM_CRITICAL_SUSPEND);
 302         }
 303
 304         schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
 305 }
 306
 307 void sharpsl_pm_led(int val)
 308 {
 309         if (val == SHARPSL_LED_ERROR) {
 310                 dev_err(sharpsl_pm.dev, "Charging Error!\n");
 311         } else if (val == SHARPSL_LED_ON) {
 312                 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
 313                 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
 314         } else {
 315                 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
 316                 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
 317         }
 318 }
 319
 320 static void sharpsl_charge_on(void)
 321 {
 322         dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
 323
 324         sharpsl_pm.full_count = 0;
 325         sharpsl_pm.charge_mode = CHRG_ON;
 326         schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
 327         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
 328 }
 329
 330 static void sharpsl_charge_off(void)
 331 {
 332         dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
 333
 334         sharpsl_pm.machinfo->charge(0);
 335         sharpsl_pm_led(SHARPSL_LED_OFF);
 336         sharpsl_pm.charge_mode = CHRG_OFF;
 337
 338         schedule_delayed_work(&sharpsl_bat, 0);
 339 }
 340
 341 static void sharpsl_charge_error(void)
 342 {
 343         sharpsl_pm_led(SHARPSL_LED_ERROR);
 344         sharpsl_pm.machinfo->charge(0);
 345         sharpsl_pm.charge_mode = CHRG_ERROR;
 346 }
 347
 348 static void sharpsl_charge_toggle(struct work_struct *private_)
 349 {
 350         dev_dbg(sharpsl_pm.dev, "Toggling Charger at time: %lx\n", jiffies);
 351
 352         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 353                 sharpsl_charge_off();
 354                 return;
 355         } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
 356                 sharpsl_charge_error();
 357                 return;
 358         }
 359
 360         sharpsl_pm_led(SHARPSL_LED_ON);
 361         sharpsl_pm.machinfo->charge(0);
 362         mdelay(SHARPSL_CHARGE_WAIT_TIME);
 363         sharpsl_pm.machinfo->charge(1);
 364
 365         sharpsl_pm.charge_start_time = jiffies;
 366 }
 367
 368 static void sharpsl_ac_timer(unsigned long data)
 369 {
 370         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 371
 372         dev_dbg(sharpsl_pm.dev, "AC Status: %d\n", acin);
 373
 374         sharpsl_average_clear();
 375         if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
 376                 sharpsl_charge_on();
 377         else if (sharpsl_pm.charge_mode == CHRG_ON)
 378                 sharpsl_charge_off();
 379
 380         schedule_delayed_work(&sharpsl_bat, 0);
 381 }
 382
 383
 384 static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
 385 {
 386         /* Delay the event slightly to debounce */
 387         /* Must be a smaller delay than the chrg_full_isr below */
 388         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 389
 390         return IRQ_HANDLED;
 391 }
 392
 393 static void sharpsl_chrg_full_timer(unsigned long data)
 394 {
 395         dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
 396
 397         sharpsl_pm.full_count++;
 398
 399         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 400                 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
 401                 if (sharpsl_pm.charge_mode == CHRG_ON)
 402                         sharpsl_charge_off();
 403         } else if (sharpsl_pm.full_count < 2) {
 404                 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
 405                 schedule_delayed_work(&toggle_charger, 0);
 406         } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
 407                 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
 408                 schedule_delayed_work(&toggle_charger, 0);
 409         } else {
 410                 sharpsl_charge_off();
 411                 sharpsl_pm.charge_mode = CHRG_DONE;
 412                 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
 413         }
 414 }
 415
 416 /* Charging Finished Interrupt (Not present on Corgi) */
 417 /* Can trigger at the same time as an AC status change so
 418    delay until after that has been processed */
 419 static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
 420 {
 421         if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
 422                 return IRQ_HANDLED;
 423
 424         /* delay until after any ac interrupt */
 425         mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
 426
 427         return IRQ_HANDLED;
 428 }
 429
 430 static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
 431 {
 432         int is_fatal = 0;
 433
 434         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
 435                 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
 436                 is_fatal = 1;
 437         }
 438
 439         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
 440                 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
 441                 is_fatal = 1;
 442         }
 443
 444         if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
 445                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 446                 apm_queue_event(APM_CRITICAL_SUSPEND);
 447         }
 448
 449         return IRQ_HANDLED;
 450 }
 451
 452 /*
 453  * Maintain an average of the last 10 readings
 454  */
 455 #define SHARPSL_CNV_VALUE_NUM    10
 456 static int sharpsl_ad_index;
 457
 458 static void sharpsl_average_clear(void)
 459 {
 460         sharpsl_ad_index = 0;
 461 }
 462
 463 static int sharpsl_average_value(int ad)
 464 {
 465         int i, ad_val = 0;
 466         static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
 467
 468         if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
 469                 sharpsl_ad_index = 0;
 470                 return ad;
 471         }
 472
 473         sharpsl_ad[sharpsl_ad_index] = ad;
 474         sharpsl_ad_index++;
 475         if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
 476                 for (i = 0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
 477                         sharpsl_ad[i] = sharpsl_ad[i+1];
 478                 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
 479         }
 480         for (i = 0; i < sharpsl_ad_index; i++)
 481                 ad_val += sharpsl_ad[i];
 482
 483         return ad_val / sharpsl_ad_index;
 484 }
 485
 486 /*
 487  * Take an array of 5 integers, remove the maximum and minimum values
 488  * and return the average.
 489  */
 490 static int get_select_val(int *val)
 491 {
 492         int i, j, k, temp, sum = 0;
 493
 494         /* Find MAX val */
 495         temp = val[0];
 496         j = 0;
 497         for (i = 1; i < 5; i++) {
 498                 if (temp < val[i]) {
 499                         temp = val[i];
 500                         j = i;
 501                 }
 502         }
 503
 504         /* Find MIN val */
 505         temp = val[4];
 506         k = 4;
 507         for (i = 3; i >= 0; i--) {
 508                 if (temp > val[i]) {
 509                         temp = val[i];
 510                         k = i;
 511                 }
 512         }
 513
 514         for (i = 0; i < 5; i++)
 515                 if (i != j && i != k)
 516                         sum += val[i];
 517
 518         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]);
 519
 520         return sum/3;
 521 }
 522
 523 static int sharpsl_check_battery_temp(void)
 524 {
 525         int val, i, buff[5];
 526
 527         /* Check battery temperature */
 528         for (i = 0; i < 5; i++) {
 529                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 530                 sharpsl_pm.machinfo->measure_temp(1);
 531                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 532                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
 533                 sharpsl_pm.machinfo->measure_temp(0);
 534         }
 535
 536         val = get_select_val(buff);
 537
 538         dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
 539         if (val > sharpsl_pm.machinfo->charge_on_temp) {
 540                 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
 541                 return -1;
 542         }
 543
 544         return 0;
 545 }
 546
 547 #ifdef CONFIG_PM
 548 static int sharpsl_check_battery_voltage(void)
 549 {
 550         int val, i, buff[5];
 551
 552         /* disable charge, enable discharge */
 553         sharpsl_pm.machinfo->charge(0);
 554         sharpsl_pm.machinfo->discharge(1);
 555         mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 556
 557         if (sharpsl_pm.machinfo->discharge1)
 558                 sharpsl_pm.machinfo->discharge1(1);
 559
 560         /* Check battery voltage */
 561         for (i = 0; i < 5; i++) {
 562                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 563                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 564         }
 565
 566         if (sharpsl_pm.machinfo->discharge1)
 567                 sharpsl_pm.machinfo->discharge1(0);
 568
 569         sharpsl_pm.machinfo->discharge(0);
 570
 571         val = get_select_val(buff);
 572         dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
 573
 574         if (val < sharpsl_pm.machinfo->charge_on_volt)
 575                 return -1;
 576
 577         return 0;
 578 }
 579 #endif
 580
 581 static int sharpsl_ac_check(void)
 582 {
 583         int temp, i, buff[5];
 584
 585         for (i = 0; i < 5; i++) {
 586                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
 587                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
 588         }
 589
 590         temp = get_select_val(buff);
 591         dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n", temp);
 592
 593         if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
 594                 dev_err(sharpsl_pm.dev, "Error: AC check failed: voltage %d.\n", temp);
 595                 return -1;
 596         }
 597
 598         return 0;
 599 }
 600
 601 #ifdef CONFIG_PM
 602 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
 603 {
 604         sharpsl_pm.flags |= SHARPSL_SUSPENDED;
 605         flush_scheduled_work();
 606
 607         if (sharpsl_pm.charge_mode == CHRG_ON)
 608                 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 609         else
 610                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 611
 612         return 0;
 613 }
 614
 615 static int sharpsl_pm_resume(struct platform_device *pdev)
 616 {
 617         /* Clear the reset source indicators as they break the bootloader upon reboot */
 618         RCSR = 0x0f;
 619         sharpsl_average_clear();
 620         sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
 621         sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
 622
 623         return 0;
 624 }
 625
 626 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 627 {
 628         dev_dbg(sharpsl_pm.dev, "Time is: %08x\n", RCNR);
 629
 630         dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n", sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
 631         /* not charging and AC-IN! */
 632
 633         if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
 634                 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
 635                 sharpsl_pm.charge_mode = CHRG_OFF;
 636                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 637                 sharpsl_off_charge_battery();
 638         }
 639
 640         sharpsl_pm.machinfo->presuspend();
 641
 642         PEDR = 0xffffffff; /* clear it */
 643
 644         sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
 645         if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
 646                 RTSR &= RTSR_ALE;
 647                 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
 648                 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n", RTAR);
 649                 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
 650         } else if (alarm_enable) {
 651                 RTSR &= RTSR_ALE;
 652                 RTAR = alarm_time;
 653                 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n", RTAR);
 654         } else {
 655                 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
 656         }
 657
 658         pxa_pm_enter(state);
 659
 660         sharpsl_pm.machinfo->postsuspend();
 661
 662         dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n", PEDR);
 663 }
 664
 665 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 666 {
 667         if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable)) {
 668                 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
 669                         dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
 670                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 671                         return 1;
 672                 }
 673                 if (sharpsl_off_charge_battery()) {
 674                         dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
 675                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 676                         return 1;
 677                 }
 678                 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
 679         }
 680
 681         if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) ||
 682             (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL))) {
 683                 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
 684                 corgi_goto_sleep(alarm_time, alarm_enable, state);
 685                 return 1;
 686         }
 687
 688         return 0;
 689 }
 690
 691 static int corgi_pxa_pm_enter(suspend_state_t state)
 692 {
 693         unsigned long alarm_time = RTAR;
 694         unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
 695
 696         dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
 697
 698         corgi_goto_sleep(alarm_time, alarm_status, state);
 699
 700         while (corgi_enter_suspend(alarm_time, alarm_status, state))
 701                 {}
 702
 703         if (sharpsl_pm.machinfo->earlyresume)
 704                 sharpsl_pm.machinfo->earlyresume();
 705
 706         dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
 707
 708         return 0;
 709 }
 710
 711 /*
 712  * Check for fatal battery errors
 713  * Fatal returns -1
 714  */
 715 static int sharpsl_fatal_check(void)
 716 {
 717         int buff[5], temp, i, acin;
 718
 719         dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
 720
 721         /* Check AC-Adapter */
 722         acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 723
 724         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 725                 sharpsl_pm.machinfo->charge(0);
 726                 udelay(100);
 727                 sharpsl_pm.machinfo->discharge(1);      /* enable discharge */
 728                 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 729         }
 730
 731         if (sharpsl_pm.machinfo->discharge1)
 732                 sharpsl_pm.machinfo->discharge1(1);
 733
 734         /* Check battery : check inserting battery ? */
 735         for (i = 0; i < 5; i++) {
 736                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 737                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 738         }
 739
 740         if (sharpsl_pm.machinfo->discharge1)
 741                 sharpsl_pm.machinfo->discharge1(0);
 742
 743         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 744                 udelay(100);
 745                 sharpsl_pm.machinfo->charge(1);
 746                 sharpsl_pm.machinfo->discharge(0);
 747         }
 748
 749         temp = get_select_val(buff);
 750         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));
 751
 752         if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
 753                         (!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
 754                 return -1;
 755         return 0;
 756 }
 757
 758 static int sharpsl_off_charge_error(void)
 759 {
 760         dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
 761         sharpsl_pm.machinfo->charge(0);
 762         sharpsl_pm_led(SHARPSL_LED_ERROR);
 763         sharpsl_pm.charge_mode = CHRG_ERROR;
 764         return 1;
 765 }
 766
 767 /*
 768  * Charging Control while suspended
 769  * Return 1 - go straight to sleep
 770  * Return 0 - sleep or wakeup depending on other factors
 771  */
 772 static int sharpsl_off_charge_battery(void)
 773 {
 774         int time;
 775
 776         dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
 777
 778         if (sharpsl_pm.charge_mode == CHRG_OFF) {
 779                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
 780
 781                 /* AC Check */
 782                 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
 783                         return sharpsl_off_charge_error();
 784
 785                 /* Start Charging */
 786                 sharpsl_pm_led(SHARPSL_LED_ON);
 787                 sharpsl_pm.machinfo->charge(0);
 788                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 789                 sharpsl_pm.machinfo->charge(1);
 790
 791                 sharpsl_pm.charge_mode = CHRG_ON;
 792                 sharpsl_pm.full_count = 0;
 793
 794                 return 1;
 795         } else if (sharpsl_pm.charge_mode != CHRG_ON) {
 796                 return 1;
 797         }
 798
 799         if (sharpsl_pm.full_count == 0) {
 800                 int time;
 801
 802                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
 803
 804                 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
 805                         return sharpsl_off_charge_error();
 806
 807                 sharpsl_pm.machinfo->charge(0);
 808                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 809                 sharpsl_pm.machinfo->charge(1);
 810                 sharpsl_pm.charge_mode = CHRG_ON;
 811
 812                 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 813
 814                 time = RCNR;
 815                 while (1) {
 816                         /* Check if any wakeup event had occurred */
 817                         if (sharpsl_pm.machinfo->charger_wakeup() != 0)
 818                                 return 0;
 819                         /* Check for timeout */
 820                         if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
 821                                 return 1;
 822                         if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 823                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
 824                                 sharpsl_pm.full_count++;
 825                                 sharpsl_pm.machinfo->charge(0);
 826                                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 827                                 sharpsl_pm.machinfo->charge(1);
 828                                 return 1;
 829                         }
 830                 }
 831         }
 832
 833         dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
 834
 835         mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 836
 837         time = RCNR;
 838         while (1) {
 839                 /* Check if any wakeup event had occurred */
 840                 if (sharpsl_pm.machinfo->charger_wakeup())
 841                         return 0;
 842                 /* Check for timeout */
 843                 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
 844                         if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
 845                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
 846                                 sharpsl_pm.full_count = 0;
 847                         }
 848                         sharpsl_pm.full_count++;
 849                         return 1;
 850                 }
 851                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 852                         dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
 853                         sharpsl_pm_led(SHARPSL_LED_OFF);
 854                         sharpsl_pm.machinfo->charge(0);
 855                         sharpsl_pm.charge_mode = CHRG_DONE;
 856                         return 1;
 857                 }
 858         }
 859 }
 860 #else
 861 #define sharpsl_pm_suspend      NULL
 862 #define sharpsl_pm_resume       NULL
 863 #endif
 864
 865 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
 866 {
 867         return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_percent);
 868 }
 869
 870 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
 871 {
 872         return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_voltage);
 873 }
 874
 875 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
 876 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
 877
 878 extern void (*apm_get_power_status)(struct apm_power_info *);
 879
 880 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
 881 {
 882         info->ac_line_status = sharpsl_pm.battstat.ac_status;
 883
 884         if (sharpsl_pm.charge_mode == CHRG_ON)
 885                 info->battery_status = APM_BATTERY_STATUS_CHARGING;
 886         else
 887                 info->battery_status = sharpsl_pm.battstat.mainbat_status;
 888
 889         info->battery_flag = (1 << info->battery_status);
 890         info->battery_life = sharpsl_pm.battstat.mainbat_percent;
 891 }
 892
 893 #ifdef CONFIG_PM
 894 static struct platform_suspend_ops sharpsl_pm_ops = {
 895         .prepare        = pxa_pm_prepare,
 896         .finish         = pxa_pm_finish,
 897         .enter          = corgi_pxa_pm_enter,
 898         .valid          = suspend_valid_only_mem,
 899 };
 900 #endif
 901
 902 static int __devinit sharpsl_pm_probe(struct platform_device *pdev)
 903 {
 904         int ret;
 905
 906         if (!pdev->dev.platform_data)
 907                 return -EINVAL;
 908
 909         sharpsl_pm.dev = &pdev->dev;
 910         sharpsl_pm.machinfo = pdev->dev.platform_data;
 911         sharpsl_pm.charge_mode = CHRG_OFF;
 912         sharpsl_pm.flags = 0;
 913
 914         init_timer(&sharpsl_pm.ac_timer);
 915         sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
 916
 917         init_timer(&sharpsl_pm.chrg_full_timer);
 918         sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
 919
 920         led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
 921
 922         sharpsl_pm.machinfo->init();
 923
 924         gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
 925         gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
 926         gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
 927         gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
 928         gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
 929         gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
 930
 931         /* Register interrupt handlers */
 932         if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr, IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "AC Input Detect", sharpsl_ac_isr)) {
 933                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin));
 934         }
 935
 936         if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
 937                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock));
 938         }
 939
 940         if (sharpsl_pm.machinfo->gpio_fatal) {
 941                 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
 942                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal));
 943                 }
 944         }
 945
 946         if (sharpsl_pm.machinfo->batfull_irq) {
 947                 /* Register interrupt handler. */
 948                 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr, IRQF_DISABLED | IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
 949                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull));
 950                 }
 951         }
 952
 953         ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
 954         ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
 955         if (ret != 0)
 956                 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
 957
 958         apm_get_power_status = sharpsl_apm_get_power_status;
 959
 960 #ifdef CONFIG_PM
 961         suspend_set_ops(&sharpsl_pm_ops);
 962 #endif
 963
 964         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 965
 966         return 0;
 967 }
 968
 969 static int sharpsl_pm_remove(struct platform_device *pdev)
 970 {
 971         suspend_set_ops(NULL);
 972
 973         device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
 974         device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
 975
 976         led_trigger_unregister_simple(sharpsl_charge_led_trigger);
 977
 978         free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
 979         free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
 980
 981         if (sharpsl_pm.machinfo->gpio_fatal)
 982                 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
 983
 984         if (sharpsl_pm.machinfo->batfull_irq)
 985                 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
 986
 987         gpio_free(sharpsl_pm.machinfo->gpio_batlock);
 988         gpio_free(sharpsl_pm.machinfo->gpio_batfull);
 989         gpio_free(sharpsl_pm.machinfo->gpio_acin);
 990
 991         if (sharpsl_pm.machinfo->exit)
 992                 sharpsl_pm.machinfo->exit();
 993
 994         del_timer_sync(&sharpsl_pm.chrg_full_timer);
 995         del_timer_sync(&sharpsl_pm.ac_timer);
 996
 997         return 0;
 998 }
 999
1000 static struct platform_driver sharpsl_pm_driver = {
1001         .probe          = sharpsl_pm_probe,
1002         .remove         = sharpsl_pm_remove,
1003         .suspend        = sharpsl_pm_suspend,
1004         .resume         = sharpsl_pm_resume,
1005         .driver         = {
1006                 .name           = "sharpsl-pm",
1007         },
1008 };
1009
1010 static int __devinit sharpsl_pm_init(void)
1011 {
1012         return platform_driver_register(&sharpsl_pm_driver);
1013 }
1014
1015 static void sharpsl_pm_exit(void)
1016 {
1017         platform_driver_unregister(&sharpsl_pm_driver);
1018 }
1019
1020 late_initcall(sharpsl_pm_init);
1021 module_exit(sharpsl_pm_exit);