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_pm.h>
  33
  34 /*
  35  * Constants
  36  */
  37 #define SHARPSL_CHARGE_ON_TIME_INTERVAL        (msecs_to_jiffies(1*60*1000))  /* 1 min */
  38 #define SHARPSL_CHARGE_FINISH_TIME             (msecs_to_jiffies(10*60*1000)) /* 10 min */
  39 #define SHARPSL_BATCHK_TIME                    (msecs_to_jiffies(15*1000))    /* 15 sec */
  40 #define SHARPSL_BATCHK_TIME_SUSPEND            (60*10)                        /* 10 min */
  41
  42 #define SHARPSL_WAIT_CO_TIME                   15  /* 15 sec */
  43 #define SHARPSL_WAIT_DISCHARGE_ON              100 /* 100 msec */
  44 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP   10  /* 10 msec */
  45 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT   10  /* 10 msec */
  46 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN   10  /* 10 msec */
  47 #define SHARPSL_CHARGE_WAIT_TIME               15  /* 15 msec */
  48 #define SHARPSL_CHARGE_CO_CHECK_TIME           5   /* 5 msec */
  49 #define SHARPSL_CHARGE_RETRY_CNT               1   /* eqv. 10 min */
  50
  51 /*
  52  * Prototypes
  53  */
  54 #ifdef CONFIG_PM
  55 static int sharpsl_off_charge_battery(void);
  56 static int sharpsl_check_battery_voltage(void);
  57 static int sharpsl_fatal_check(void);
  58 #endif
  59 static int sharpsl_check_battery_temp(void);
  60 static int sharpsl_ac_check(void);
  61 static int sharpsl_average_value(int ad);
  62 static void sharpsl_average_clear(void);
  63 static void sharpsl_charge_toggle(struct work_struct *private_);
  64 static void sharpsl_battery_thread(struct work_struct *private_);
  65
  66
  67 /*
  68  * Variables
  69  */
  70 struct sharpsl_pm_status sharpsl_pm;
  71 static DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
  72 static DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
  73 DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
  74
  75
  76
  77 struct battery_thresh sharpsl_battery_levels_acin[] = {
  78         { 213, 100},
  79         { 212,  98},
  80         { 211,  95},
  81         { 210,  93},
  82         { 209,  90},
  83         { 208,  88},
  84         { 207,  85},
  85         { 206,  83},
  86         { 205,  80},
  87         { 204,  78},
  88         { 203,  75},
  89         { 202,  73},
  90         { 201,  70},
  91         { 200,  68},
  92         { 199,  65},
  93         { 198,  63},
  94         { 197,  60},
  95         { 196,  58},
  96         { 195,  55},
  97         { 194,  53},
  98         { 193,  50},
  99         { 192,  48},
 100         { 192,  45},
 101         { 191,  43},
 102         { 191,  40},
 103         { 190,  38},
 104         { 190,  35},
 105         { 189,  33},
 106         { 188,  30},
 107         { 187,  28},
 108         { 186,  25},
 109         { 185,  23},
 110         { 184,  20},
 111         { 183,  18},
 112         { 182,  15},
 113         { 181,  13},
 114         { 180,  10},
 115         { 179,   8},
 116         { 178,   5},
 117         {   0,   0},
 118 };
 119
 120 struct battery_thresh sharpsl_battery_levels_noac[] = {
 121         { 213, 100},
 122         { 212,  98},
 123         { 211,  95},
 124         { 210,  93},
 125         { 209,  90},
 126         { 208,  88},
 127         { 207,  85},
 128         { 206,  83},
 129         { 205,  80},
 130         { 204,  78},
 131         { 203,  75},
 132         { 202,  73},
 133         { 201,  70},
 134         { 200,  68},
 135         { 199,  65},
 136         { 198,  63},
 137         { 197,  60},
 138         { 196,  58},
 139         { 195,  55},
 140         { 194,  53},
 141         { 193,  50},
 142         { 192,  48},
 143         { 191,  45},
 144         { 190,  43},
 145         { 189,  40},
 146         { 188,  38},
 147         { 187,  35},
 148         { 186,  33},
 149         { 185,  30},
 150         { 184,  28},
 151         { 183,  25},
 152         { 182,  23},
 153         { 181,  20},
 154         { 180,  18},
 155         { 179,  15},
 156         { 178,  13},
 157         { 177,  10},
 158         { 176,   8},
 159         { 175,   5},
 160         {   0,   0},
 161 };
 162
 163 /* MAX1111 Commands */
 164 #define MAXCTRL_PD0      (1u << 0)
 165 #define MAXCTRL_PD1      (1u << 1)
 166 #define MAXCTRL_SGL      (1u << 2)
 167 #define MAXCTRL_UNI      (1u << 3)
 168 #define MAXCTRL_SEL_SH   4
 169 #define MAXCTRL_STR      (1u << 7)
 170
 171 /*
 172  * Read MAX1111 ADC
 173  */
 174 int sharpsl_pm_pxa_read_max1111(int channel)
 175 {
 176         /* Ugly, better move this function into another module */
 177         if (machine_is_tosa())
 178             return 0;
 179
 180         extern int max1111_read_channel(int);
 181
 182         /* max1111 accepts channels from 0-3, however,
 183          * it is encoded from 0-7 here in the code.
 184          */
 185         return max1111_read_channel(channel >> 1);
 186 }
 187
 188 static int get_percentage(int voltage)
 189 {
 190         int i = sharpsl_pm.machinfo->bat_levels - 1;
 191         int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
 192         struct battery_thresh *thresh;
 193
 194         if (sharpsl_pm.charge_mode == CHRG_ON)
 195                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
 196         else
 197                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
 198
 199         while (i > 0 && (voltage > thresh[i].voltage))
 200                 i--;
 201
 202         return thresh[i].percentage;
 203 }
 204
 205 static int get_apm_status(int voltage)
 206 {
 207         int low_thresh, high_thresh;
 208
 209         if (sharpsl_pm.charge_mode == CHRG_ON) {
 210                 high_thresh = sharpsl_pm.machinfo->status_high_acin;
 211                 low_thresh = sharpsl_pm.machinfo->status_low_acin;
 212         } else {
 213                 high_thresh = sharpsl_pm.machinfo->status_high_noac;
 214                 low_thresh = sharpsl_pm.machinfo->status_low_noac;
 215         }
 216
 217         if (voltage >= high_thresh)
 218                 return APM_BATTERY_STATUS_HIGH;
 219         if (voltage >= low_thresh)
 220                 return APM_BATTERY_STATUS_LOW;
 221         return APM_BATTERY_STATUS_CRITICAL;
 222 }
 223
 224 void sharpsl_battery_kick(void)
 225 {
 226         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
 227 }
 228 EXPORT_SYMBOL(sharpsl_battery_kick);
 229
 230
 231 static void sharpsl_battery_thread(struct work_struct *private_)
 232 {
 233         int voltage, percent, apm_status, i;
 234
 235         if (!sharpsl_pm.machinfo)
 236                 return;
 237
 238         sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
 239
 240         /* Corgi cannot confirm when battery fully charged so periodically kick! */
 241         if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
 242                         && time_after(jiffies, sharpsl_pm.charge_start_time +  SHARPSL_CHARGE_ON_TIME_INTERVAL))
 243                 schedule_delayed_work(&toggle_charger, 0);
 244
 245         for (i = 0; i < 5; i++) {
 246                 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 247                 if (voltage > 0)
 248                         break;
 249         }
 250         if (voltage <= 0) {
 251                 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
 252                 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
 253         }
 254
 255         voltage = sharpsl_average_value(voltage);
 256         apm_status = get_apm_status(voltage);
 257         percent = get_percentage(voltage);
 258
 259         /* At low battery voltages, the voltage has a tendency to start
 260            creeping back up so we try to avoid this here */
 261         if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE)
 262             || (apm_status == APM_BATTERY_STATUS_HIGH)
 263             || percent <= sharpsl_pm.battstat.mainbat_percent) {
 264                 sharpsl_pm.battstat.mainbat_voltage = voltage;
 265                 sharpsl_pm.battstat.mainbat_status = apm_status;
 266                 sharpsl_pm.battstat.mainbat_percent = percent;
 267         }
 268
 269         dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
 270                         sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
 271
 272         /* Suspend if critical battery level */
 273         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 274              && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
 275              && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
 276                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 277                 dev_err(sharpsl_pm.dev, "Fatal Off\n");
 278                 apm_queue_event(APM_CRITICAL_SUSPEND);
 279         }
 280
 281         schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
 282 }
 283
 284 void sharpsl_pm_led(int val)
 285 {
 286         if (val == SHARPSL_LED_ERROR) {
 287                 dev_err(sharpsl_pm.dev, "Charging Error!\n");
 288         } else if (val == SHARPSL_LED_ON) {
 289                 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
 290                 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
 291         } else {
 292                 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
 293                 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
 294         }
 295 }
 296
 297 static void sharpsl_charge_on(void)
 298 {
 299         dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
 300
 301         sharpsl_pm.full_count = 0;
 302         sharpsl_pm.charge_mode = CHRG_ON;
 303         schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
 304         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
 305 }
 306
 307 static void sharpsl_charge_off(void)
 308 {
 309         dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
 310
 311         sharpsl_pm.machinfo->charge(0);
 312         sharpsl_pm_led(SHARPSL_LED_OFF);
 313         sharpsl_pm.charge_mode = CHRG_OFF;
 314
 315         schedule_delayed_work(&sharpsl_bat, 0);
 316 }
 317
 318 static void sharpsl_charge_error(void)
 319 {
 320         sharpsl_pm_led(SHARPSL_LED_ERROR);
 321         sharpsl_pm.machinfo->charge(0);
 322         sharpsl_pm.charge_mode = CHRG_ERROR;
 323 }
 324
 325 static void sharpsl_charge_toggle(struct work_struct *private_)
 326 {
 327         dev_dbg(sharpsl_pm.dev, "Toggling Charger at time: %lx\n", jiffies);
 328
 329         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 330                 sharpsl_charge_off();
 331                 return;
 332         } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
 333                 sharpsl_charge_error();
 334                 return;
 335         }
 336
 337         sharpsl_pm_led(SHARPSL_LED_ON);
 338         sharpsl_pm.machinfo->charge(0);
 339         mdelay(SHARPSL_CHARGE_WAIT_TIME);
 340         sharpsl_pm.machinfo->charge(1);
 341
 342         sharpsl_pm.charge_start_time = jiffies;
 343 }
 344
 345 static void sharpsl_ac_timer(unsigned long data)
 346 {
 347         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 348
 349         dev_dbg(sharpsl_pm.dev, "AC Status: %d\n", acin);
 350
 351         sharpsl_average_clear();
 352         if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
 353                 sharpsl_charge_on();
 354         else if (sharpsl_pm.charge_mode == CHRG_ON)
 355                 sharpsl_charge_off();
 356
 357         schedule_delayed_work(&sharpsl_bat, 0);
 358 }
 359
 360
 361 static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
 362 {
 363         /* Delay the event slightly to debounce */
 364         /* Must be a smaller delay than the chrg_full_isr below */
 365         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 366
 367         return IRQ_HANDLED;
 368 }
 369
 370 static void sharpsl_chrg_full_timer(unsigned long data)
 371 {
 372         dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
 373
 374         sharpsl_pm.full_count++;
 375
 376         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 377                 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
 378                 if (sharpsl_pm.charge_mode == CHRG_ON)
 379                         sharpsl_charge_off();
 380         } else if (sharpsl_pm.full_count < 2) {
 381                 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
 382                 schedule_delayed_work(&toggle_charger, 0);
 383         } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
 384                 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
 385                 schedule_delayed_work(&toggle_charger, 0);
 386         } else {
 387                 sharpsl_charge_off();
 388                 sharpsl_pm.charge_mode = CHRG_DONE;
 389                 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
 390         }
 391 }
 392
 393 /* Charging Finished Interrupt (Not present on Corgi) */
 394 /* Can trigger at the same time as an AC status change so
 395    delay until after that has been processed */
 396 static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
 397 {
 398         if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
 399                 return IRQ_HANDLED;
 400
 401         /* delay until after any ac interrupt */
 402         mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
 403
 404         return IRQ_HANDLED;
 405 }
 406
 407 static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
 408 {
 409         int is_fatal = 0;
 410
 411         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
 412                 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
 413                 is_fatal = 1;
 414         }
 415
 416         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
 417                 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
 418                 is_fatal = 1;
 419         }
 420
 421         if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
 422                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 423                 apm_queue_event(APM_CRITICAL_SUSPEND);
 424         }
 425
 426         return IRQ_HANDLED;
 427 }
 428
 429 /*
 430  * Maintain an average of the last 10 readings
 431  */
 432 #define SHARPSL_CNV_VALUE_NUM    10
 433 static int sharpsl_ad_index;
 434
 435 static void sharpsl_average_clear(void)
 436 {
 437         sharpsl_ad_index = 0;
 438 }
 439
 440 static int sharpsl_average_value(int ad)
 441 {
 442         int i, ad_val = 0;
 443         static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
 444
 445         if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
 446                 sharpsl_ad_index = 0;
 447                 return ad;
 448         }
 449
 450         sharpsl_ad[sharpsl_ad_index] = ad;
 451         sharpsl_ad_index++;
 452         if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
 453                 for (i = 0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
 454                         sharpsl_ad[i] = sharpsl_ad[i+1];
 455                 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
 456         }
 457         for (i = 0; i < sharpsl_ad_index; i++)
 458                 ad_val += sharpsl_ad[i];
 459
 460         return ad_val / sharpsl_ad_index;
 461 }
 462
 463 /*
 464  * Take an array of 5 integers, remove the maximum and minimum values
 465  * and return the average.
 466  */
 467 static int get_select_val(int *val)
 468 {
 469         int i, j, k, temp, sum = 0;
 470
 471         /* Find MAX val */
 472         temp = val[0];
 473         j = 0;
 474         for (i = 1; i < 5; i++) {
 475                 if (temp < val[i]) {
 476                         temp = val[i];
 477                         j = i;
 478                 }
 479         }
 480
 481         /* Find MIN val */
 482         temp = val[4];
 483         k = 4;
 484         for (i = 3; i >= 0; i--) {
 485                 if (temp > val[i]) {
 486                         temp = val[i];
 487                         k = i;
 488                 }
 489         }
 490
 491         for (i = 0; i < 5; i++)
 492                 if (i != j && i != k)
 493                         sum += val[i];
 494
 495         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]);
 496
 497         return sum/3;
 498 }
 499
 500 static int sharpsl_check_battery_temp(void)
 501 {
 502         int val, i, buff[5];
 503
 504         /* Check battery temperature */
 505         for (i = 0; i < 5; i++) {
 506                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 507                 sharpsl_pm.machinfo->measure_temp(1);
 508                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 509                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
 510                 sharpsl_pm.machinfo->measure_temp(0);
 511         }
 512
 513         val = get_select_val(buff);
 514
 515         dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
 516         if (val > sharpsl_pm.machinfo->charge_on_temp) {
 517                 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
 518                 return -1;
 519         }
 520
 521         return 0;
 522 }
 523
 524 #ifdef CONFIG_PM
 525 static int sharpsl_check_battery_voltage(void)
 526 {
 527         int val, i, buff[5];
 528
 529         /* disable charge, enable discharge */
 530         sharpsl_pm.machinfo->charge(0);
 531         sharpsl_pm.machinfo->discharge(1);
 532         mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 533
 534         if (sharpsl_pm.machinfo->discharge1)
 535                 sharpsl_pm.machinfo->discharge1(1);
 536
 537         /* Check battery voltage */
 538         for (i = 0; i < 5; i++) {
 539                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 540                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 541         }
 542
 543         if (sharpsl_pm.machinfo->discharge1)
 544                 sharpsl_pm.machinfo->discharge1(0);
 545
 546         sharpsl_pm.machinfo->discharge(0);
 547
 548         val = get_select_val(buff);
 549         dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
 550
 551         if (val < sharpsl_pm.machinfo->charge_on_volt)
 552                 return -1;
 553
 554         return 0;
 555 }
 556 #endif
 557
 558 static int sharpsl_ac_check(void)
 559 {
 560         int temp, i, buff[5];
 561
 562         for (i = 0; i < 5; i++) {
 563                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
 564                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
 565         }
 566
 567         temp = get_select_val(buff);
 568         dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n", temp);
 569
 570         if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
 571                 dev_err(sharpsl_pm.dev, "Error: AC check failed: voltage %d.\n", temp);
 572                 return -1;
 573         }
 574
 575         return 0;
 576 }
 577
 578 #ifdef CONFIG_PM
 579 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
 580 {
 581         sharpsl_pm.flags |= SHARPSL_SUSPENDED;
 582         flush_delayed_work_sync(&toggle_charger);
 583         flush_delayed_work_sync(&sharpsl_bat);
 584
 585         if (sharpsl_pm.charge_mode == CHRG_ON)
 586                 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 587         else
 588                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 589
 590         return 0;
 591 }
 592
 593 static int sharpsl_pm_resume(struct platform_device *pdev)
 594 {
 595         /* Clear the reset source indicators as they break the bootloader upon reboot */
 596         RCSR = 0x0f;
 597         sharpsl_average_clear();
 598         sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
 599         sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
 600
 601         return 0;
 602 }
 603
 604 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 605 {
 606         dev_dbg(sharpsl_pm.dev, "Time is: %08x\n", RCNR);
 607
 608         dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n", sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
 609         /* not charging and AC-IN! */
 610
 611         if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
 612                 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
 613                 sharpsl_pm.charge_mode = CHRG_OFF;
 614                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 615                 sharpsl_off_charge_battery();
 616         }
 617
 618         sharpsl_pm.machinfo->presuspend();
 619
 620         PEDR = 0xffffffff; /* clear it */
 621
 622         sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
 623         if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
 624                 RTSR &= RTSR_ALE;
 625                 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
 626                 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n", RTAR);
 627                 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
 628         } else if (alarm_enable) {
 629                 RTSR &= RTSR_ALE;
 630                 RTAR = alarm_time;
 631                 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n", RTAR);
 632         } else {
 633                 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
 634         }
 635
 636         pxa_pm_enter(state);
 637
 638         sharpsl_pm.machinfo->postsuspend();
 639
 640         dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n", PEDR);
 641 }
 642
 643 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 644 {
 645         if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable)) {
 646                 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
 647                         dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
 648                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 649                         return 1;
 650                 }
 651                 if (sharpsl_off_charge_battery()) {
 652                         dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
 653                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 654                         return 1;
 655                 }
 656                 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
 657         }
 658
 659         if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) ||
 660             (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL))) {
 661                 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
 662                 corgi_goto_sleep(alarm_time, alarm_enable, state);
 663                 return 1;
 664         }
 665
 666         return 0;
 667 }
 668
 669 static int corgi_pxa_pm_enter(suspend_state_t state)
 670 {
 671         unsigned long alarm_time = RTAR;
 672         unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
 673
 674         dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
 675
 676         corgi_goto_sleep(alarm_time, alarm_status, state);
 677
 678         while (corgi_enter_suspend(alarm_time, alarm_status, state))
 679                 {}
 680
 681         if (sharpsl_pm.machinfo->earlyresume)
 682                 sharpsl_pm.machinfo->earlyresume();
 683
 684         dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
 685
 686         return 0;
 687 }
 688
 689 /*
 690  * Check for fatal battery errors
 691  * Fatal returns -1
 692  */
 693 static int sharpsl_fatal_check(void)
 694 {
 695         int buff[5], temp, i, acin;
 696
 697         dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
 698
 699         /* Check AC-Adapter */
 700         acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 701
 702         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 703                 sharpsl_pm.machinfo->charge(0);
 704                 udelay(100);
 705                 sharpsl_pm.machinfo->discharge(1);      /* enable discharge */
 706                 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 707         }
 708
 709         if (sharpsl_pm.machinfo->discharge1)
 710                 sharpsl_pm.machinfo->discharge1(1);
 711
 712         /* Check battery : check inserting battery ? */
 713         for (i = 0; i < 5; i++) {
 714                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 715                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 716         }
 717
 718         if (sharpsl_pm.machinfo->discharge1)
 719                 sharpsl_pm.machinfo->discharge1(0);
 720
 721         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 722                 udelay(100);
 723                 sharpsl_pm.machinfo->charge(1);
 724                 sharpsl_pm.machinfo->discharge(0);
 725         }
 726
 727         temp = get_select_val(buff);
 728         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));
 729
 730         if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
 731                         (!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
 732                 return -1;
 733         return 0;
 734 }
 735
 736 static int sharpsl_off_charge_error(void)
 737 {
 738         dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
 739         sharpsl_pm.machinfo->charge(0);
 740         sharpsl_pm_led(SHARPSL_LED_ERROR);
 741         sharpsl_pm.charge_mode = CHRG_ERROR;
 742         return 1;
 743 }
 744
 745 /*
 746  * Charging Control while suspended
 747  * Return 1 - go straight to sleep
 748  * Return 0 - sleep or wakeup depending on other factors
 749  */
 750 static int sharpsl_off_charge_battery(void)
 751 {
 752         int time;
 753
 754         dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
 755
 756         if (sharpsl_pm.charge_mode == CHRG_OFF) {
 757                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
 758
 759                 /* AC Check */
 760                 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
 761                         return sharpsl_off_charge_error();
 762
 763                 /* Start Charging */
 764                 sharpsl_pm_led(SHARPSL_LED_ON);
 765                 sharpsl_pm.machinfo->charge(0);
 766                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 767                 sharpsl_pm.machinfo->charge(1);
 768
 769                 sharpsl_pm.charge_mode = CHRG_ON;
 770                 sharpsl_pm.full_count = 0;
 771
 772                 return 1;
 773         } else if (sharpsl_pm.charge_mode != CHRG_ON) {
 774                 return 1;
 775         }
 776
 777         if (sharpsl_pm.full_count == 0) {
 778                 int time;
 779
 780                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
 781
 782                 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
 783                         return sharpsl_off_charge_error();
 784
 785                 sharpsl_pm.machinfo->charge(0);
 786                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 787                 sharpsl_pm.machinfo->charge(1);
 788                 sharpsl_pm.charge_mode = CHRG_ON;
 789
 790                 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 791
 792                 time = RCNR;
 793                 while (1) {
 794                         /* Check if any wakeup event had occurred */
 795                         if (sharpsl_pm.machinfo->charger_wakeup() != 0)
 796                                 return 0;
 797                         /* Check for timeout */
 798                         if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
 799                                 return 1;
 800                         if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 801                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
 802                                 sharpsl_pm.full_count++;
 803                                 sharpsl_pm.machinfo->charge(0);
 804                                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 805                                 sharpsl_pm.machinfo->charge(1);
 806                                 return 1;
 807                         }
 808                 }
 809         }
 810
 811         dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
 812
 813         mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 814
 815         time = RCNR;
 816         while (1) {
 817                 /* Check if any wakeup event had occurred */
 818                 if (sharpsl_pm.machinfo->charger_wakeup())
 819                         return 0;
 820                 /* Check for timeout */
 821                 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
 822                         if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
 823                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
 824                                 sharpsl_pm.full_count = 0;
 825                         }
 826                         sharpsl_pm.full_count++;
 827                         return 1;
 828                 }
 829                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 830                         dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
 831                         sharpsl_pm_led(SHARPSL_LED_OFF);
 832                         sharpsl_pm.machinfo->charge(0);
 833                         sharpsl_pm.charge_mode = CHRG_DONE;
 834                         return 1;
 835                 }
 836         }
 837 }
 838 #else
 839 #define sharpsl_pm_suspend      NULL
 840 #define sharpsl_pm_resume       NULL
 841 #endif
 842
 843 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
 844 {
 845         return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_percent);
 846 }
 847
 848 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
 849 {
 850         return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_voltage);
 851 }
 852
 853 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
 854 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
 855
 856 extern void (*apm_get_power_status)(struct apm_power_info *);
 857
 858 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
 859 {
 860         info->ac_line_status = sharpsl_pm.battstat.ac_status;
 861
 862         if (sharpsl_pm.charge_mode == CHRG_ON)
 863                 info->battery_status = APM_BATTERY_STATUS_CHARGING;
 864         else
 865                 info->battery_status = sharpsl_pm.battstat.mainbat_status;
 866
 867         info->battery_flag = (1 << info->battery_status);
 868         info->battery_life = sharpsl_pm.battstat.mainbat_percent;
 869 }
 870
 871 #ifdef CONFIG_PM
 872 static const struct platform_suspend_ops sharpsl_pm_ops = {
 873         .prepare        = pxa_pm_prepare,
 874         .finish         = pxa_pm_finish,
 875         .enter          = corgi_pxa_pm_enter,
 876         .valid          = suspend_valid_only_mem,
 877 };
 878 #endif
 879
 880 static int __devinit sharpsl_pm_probe(struct platform_device *pdev)
 881 {
 882         int ret;
 883
 884         if (!pdev->dev.platform_data)
 885                 return -EINVAL;
 886
 887         sharpsl_pm.dev = &pdev->dev;
 888         sharpsl_pm.machinfo = pdev->dev.platform_data;
 889         sharpsl_pm.charge_mode = CHRG_OFF;
 890         sharpsl_pm.flags = 0;
 891
 892         init_timer(&sharpsl_pm.ac_timer);
 893         sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
 894
 895         init_timer(&sharpsl_pm.chrg_full_timer);
 896         sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
 897
 898         led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
 899
 900         sharpsl_pm.machinfo->init();
 901
 902         gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
 903         gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
 904         gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
 905         gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
 906         gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
 907         gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
 908
 909         /* Register interrupt handlers */
 910         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)) {
 911                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin));
 912         }
 913
 914         if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
 915                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock));
 916         }
 917
 918         if (sharpsl_pm.machinfo->gpio_fatal) {
 919                 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
 920                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal));
 921                 }
 922         }
 923
 924         if (sharpsl_pm.machinfo->batfull_irq) {
 925                 /* Register interrupt handler. */
 926                 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr, IRQF_DISABLED | IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
 927                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull));
 928                 }
 929         }
 930
 931         ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
 932         ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
 933         if (ret != 0)
 934                 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
 935
 936         apm_get_power_status = sharpsl_apm_get_power_status;
 937
 938 #ifdef CONFIG_PM
 939         suspend_set_ops(&sharpsl_pm_ops);
 940 #endif
 941
 942         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 943
 944         return 0;
 945 }
 946
 947 static int sharpsl_pm_remove(struct platform_device *pdev)
 948 {
 949         suspend_set_ops(NULL);
 950
 951         device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
 952         device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
 953
 954         led_trigger_unregister_simple(sharpsl_charge_led_trigger);
 955
 956         free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
 957         free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
 958
 959         if (sharpsl_pm.machinfo->gpio_fatal)
 960                 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
 961
 962         if (sharpsl_pm.machinfo->batfull_irq)
 963                 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
 964
 965         gpio_free(sharpsl_pm.machinfo->gpio_batlock);
 966         gpio_free(sharpsl_pm.machinfo->gpio_batfull);
 967         gpio_free(sharpsl_pm.machinfo->gpio_acin);
 968
 969         if (sharpsl_pm.machinfo->exit)
 970                 sharpsl_pm.machinfo->exit();
 971
 972         del_timer_sync(&sharpsl_pm.chrg_full_timer);
 973         del_timer_sync(&sharpsl_pm.ac_timer);
 974
 975         return 0;
 976 }
 977
 978 static struct platform_driver sharpsl_pm_driver = {
 979         .probe          = sharpsl_pm_probe,
 980         .remove         = sharpsl_pm_remove,
 981         .suspend        = sharpsl_pm_suspend,
 982         .resume         = sharpsl_pm_resume,
 983         .driver         = {
 984                 .name           = "sharpsl-pm",
 985         },
 986 };
 987
 988 static int __devinit sharpsl_pm_init(void)
 989 {
 990         return platform_driver_register(&sharpsl_pm_driver);
 991 }
 992
 993 static void sharpsl_pm_exit(void)
 994 {
 995         platform_driver_unregister(&sharpsl_pm_driver);
 996 }
 997
 998 late_initcall(sharpsl_pm_init);
 999 module_exit(sharpsl_pm_exit);