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         /* Suspend if critical battery level */
 281         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 282              && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
 283              && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
 284                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 285                 dev_err(sharpsl_pm.dev, "Fatal Off\n");
 286                 apm_queue_event(APM_CRITICAL_SUSPEND);
 287         }
 288
 289         schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
 290 }
 291
 292 void sharpsl_pm_led(int val)
 293 {
 294         if (val == SHARPSL_LED_ERROR) {
 295                 dev_err(sharpsl_pm.dev, "Charging Error!\n");
 296         } else if (val == SHARPSL_LED_ON) {
 297                 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
 298                 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
 299         } else {
 300                 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
 301                 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
 302         }
 303 }
 304
 305 static void sharpsl_charge_on(void)
 306 {
 307         dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
 308
 309         sharpsl_pm.full_count = 0;
 310         sharpsl_pm.charge_mode = CHRG_ON;
 311         schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
 312         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
 313 }
 314
 315 static void sharpsl_charge_off(void)
 316 {
 317         dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
 318
 319         sharpsl_pm.machinfo->charge(0);
 320         sharpsl_pm_led(SHARPSL_LED_OFF);
 321         sharpsl_pm.charge_mode = CHRG_OFF;
 322
 323         schedule_delayed_work(&sharpsl_bat, 0);
 324 }
 325
 326 static void sharpsl_charge_error(void)
 327 {
 328         sharpsl_pm_led(SHARPSL_LED_ERROR);
 329         sharpsl_pm.machinfo->charge(0);
 330         sharpsl_pm.charge_mode = CHRG_ERROR;
 331 }
 332
 333 static void sharpsl_charge_toggle(struct work_struct *private_)
 334 {
 335         dev_dbg(sharpsl_pm.dev, "Toggling Charger at time: %lx\n", jiffies);
 336
 337         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 338                 sharpsl_charge_off();
 339                 return;
 340         } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
 341                 sharpsl_charge_error();
 342                 return;
 343         }
 344
 345         sharpsl_pm_led(SHARPSL_LED_ON);
 346         sharpsl_pm.machinfo->charge(0);
 347         mdelay(SHARPSL_CHARGE_WAIT_TIME);
 348         sharpsl_pm.machinfo->charge(1);
 349
 350         sharpsl_pm.charge_start_time = jiffies;
 351 }
 352
 353 static void sharpsl_ac_timer(unsigned long data)
 354 {
 355         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 356
 357         dev_dbg(sharpsl_pm.dev, "AC Status: %d\n", acin);
 358
 359         sharpsl_average_clear();
 360         if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
 361                 sharpsl_charge_on();
 362         else if (sharpsl_pm.charge_mode == CHRG_ON)
 363                 sharpsl_charge_off();
 364
 365         schedule_delayed_work(&sharpsl_bat, 0);
 366 }
 367
 368
 369 static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
 370 {
 371         /* Delay the event slightly to debounce */
 372         /* Must be a smaller delay than the chrg_full_isr below */
 373         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 374
 375         return IRQ_HANDLED;
 376 }
 377
 378 static void sharpsl_chrg_full_timer(unsigned long data)
 379 {
 380         dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
 381
 382         sharpsl_pm.full_count++;
 383
 384         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 385                 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
 386                 if (sharpsl_pm.charge_mode == CHRG_ON)
 387                         sharpsl_charge_off();
 388         } else if (sharpsl_pm.full_count < 2) {
 389                 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
 390                 schedule_delayed_work(&toggle_charger, 0);
 391         } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
 392                 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
 393                 schedule_delayed_work(&toggle_charger, 0);
 394         } else {
 395                 sharpsl_charge_off();
 396                 sharpsl_pm.charge_mode = CHRG_DONE;
 397                 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
 398         }
 399 }
 400
 401 /* Charging Finished Interrupt (Not present on Corgi) */
 402 /* Can trigger at the same time as an AC status change so
 403    delay until after that has been processed */
 404 static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
 405 {
 406         if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
 407                 return IRQ_HANDLED;
 408
 409         /* delay until after any ac interrupt */
 410         mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
 411
 412         return IRQ_HANDLED;
 413 }
 414
 415 static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
 416 {
 417         int is_fatal = 0;
 418
 419         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
 420                 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
 421                 is_fatal = 1;
 422         }
 423
 424         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
 425                 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
 426                 is_fatal = 1;
 427         }
 428
 429         if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
 430                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 431                 apm_queue_event(APM_CRITICAL_SUSPEND);
 432         }
 433
 434         return IRQ_HANDLED;
 435 }
 436
 437 /*
 438  * Maintain an average of the last 10 readings
 439  */
 440 #define SHARPSL_CNV_VALUE_NUM    10
 441 static int sharpsl_ad_index;
 442
 443 static void sharpsl_average_clear(void)
 444 {
 445         sharpsl_ad_index = 0;
 446 }
 447
 448 static int sharpsl_average_value(int ad)
 449 {
 450         int i, ad_val = 0;
 451         static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
 452
 453         if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
 454                 sharpsl_ad_index = 0;
 455                 return ad;
 456         }
 457
 458         sharpsl_ad[sharpsl_ad_index] = ad;
 459         sharpsl_ad_index++;
 460         if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
 461                 for (i = 0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
 462                         sharpsl_ad[i] = sharpsl_ad[i+1];
 463                 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
 464         }
 465         for (i = 0; i < sharpsl_ad_index; i++)
 466                 ad_val += sharpsl_ad[i];
 467
 468         return ad_val / sharpsl_ad_index;
 469 }
 470
 471 /*
 472  * Take an array of 5 integers, remove the maximum and minimum values
 473  * and return the average.
 474  */
 475 static int get_select_val(int *val)
 476 {
 477         int i, j, k, temp, sum = 0;
 478
 479         /* Find MAX val */
 480         temp = val[0];
 481         j = 0;
 482         for (i = 1; i < 5; i++) {
 483                 if (temp < val[i]) {
 484                         temp = val[i];
 485                         j = i;
 486                 }
 487         }
 488
 489         /* Find MIN val */
 490         temp = val[4];
 491         k = 4;
 492         for (i = 3; i >= 0; i--) {
 493                 if (temp > val[i]) {
 494                         temp = val[i];
 495                         k = i;
 496                 }
 497         }
 498
 499         for (i = 0; i < 5; i++)
 500                 if (i != j && i != k)
 501                         sum += val[i];
 502
 503         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]);
 504
 505         return sum/3;
 506 }
 507
 508 static int sharpsl_check_battery_temp(void)
 509 {
 510         int val, i, buff[5];
 511
 512         /* Check battery temperature */
 513         for (i = 0; i < 5; i++) {
 514                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 515                 sharpsl_pm.machinfo->measure_temp(1);
 516                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 517                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
 518                 sharpsl_pm.machinfo->measure_temp(0);
 519         }
 520
 521         val = get_select_val(buff);
 522
 523         dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
 524         if (val > sharpsl_pm.machinfo->charge_on_temp) {
 525                 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
 526                 return -1;
 527         }
 528
 529         return 0;
 530 }
 531
 532 #ifdef CONFIG_PM
 533 static int sharpsl_check_battery_voltage(void)
 534 {
 535         int val, i, buff[5];
 536
 537         /* disable charge, enable discharge */
 538         sharpsl_pm.machinfo->charge(0);
 539         sharpsl_pm.machinfo->discharge(1);
 540         mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 541
 542         if (sharpsl_pm.machinfo->discharge1)
 543                 sharpsl_pm.machinfo->discharge1(1);
 544
 545         /* Check battery voltage */
 546         for (i = 0; i < 5; i++) {
 547                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 548                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 549         }
 550
 551         if (sharpsl_pm.machinfo->discharge1)
 552                 sharpsl_pm.machinfo->discharge1(0);
 553
 554         sharpsl_pm.machinfo->discharge(0);
 555
 556         val = get_select_val(buff);
 557         dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
 558
 559         if (val < sharpsl_pm.machinfo->charge_on_volt)
 560                 return -1;
 561
 562         return 0;
 563 }
 564 #endif
 565
 566 static int sharpsl_ac_check(void)
 567 {
 568         int temp, i, buff[5];
 569
 570         for (i = 0; i < 5; i++) {
 571                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
 572                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
 573         }
 574
 575         temp = get_select_val(buff);
 576         dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n", temp);
 577
 578         if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
 579                 dev_err(sharpsl_pm.dev, "Error: AC check failed: voltage %d.\n", temp);
 580                 return -1;
 581         }
 582
 583         return 0;
 584 }
 585
 586 #ifdef CONFIG_PM
 587 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
 588 {
 589         sharpsl_pm.flags |= SHARPSL_SUSPENDED;
 590         flush_scheduled_work();
 591
 592         if (sharpsl_pm.charge_mode == CHRG_ON)
 593                 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 594         else
 595                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 596
 597         return 0;
 598 }
 599
 600 static int sharpsl_pm_resume(struct platform_device *pdev)
 601 {
 602         /* Clear the reset source indicators as they break the bootloader upon reboot */
 603         RCSR = 0x0f;
 604         sharpsl_average_clear();
 605         sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
 606         sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
 607
 608         return 0;
 609 }
 610
 611 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 612 {
 613         dev_dbg(sharpsl_pm.dev, "Time is: %08x\n", RCNR);
 614
 615         dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n", sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
 616         /* not charging and AC-IN! */
 617
 618         if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
 619                 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
 620                 sharpsl_pm.charge_mode = CHRG_OFF;
 621                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 622                 sharpsl_off_charge_battery();
 623         }
 624
 625         sharpsl_pm.machinfo->presuspend();
 626
 627         PEDR = 0xffffffff; /* clear it */
 628
 629         sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
 630         if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
 631                 RTSR &= RTSR_ALE;
 632                 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
 633                 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n", RTAR);
 634                 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
 635         } else if (alarm_enable) {
 636                 RTSR &= RTSR_ALE;
 637                 RTAR = alarm_time;
 638                 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n", RTAR);
 639         } else {
 640                 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
 641         }
 642
 643         pxa_pm_enter(state);
 644
 645         sharpsl_pm.machinfo->postsuspend();
 646
 647         dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n", PEDR);
 648 }
 649
 650 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 651 {
 652         if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable)) {
 653                 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
 654                         dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
 655                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 656                         return 1;
 657                 }
 658                 if (sharpsl_off_charge_battery()) {
 659                         dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
 660                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 661                         return 1;
 662                 }
 663                 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
 664         }
 665
 666         if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) ||
 667             (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL))) {
 668                 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
 669                 corgi_goto_sleep(alarm_time, alarm_enable, state);
 670                 return 1;
 671         }
 672
 673         return 0;
 674 }
 675
 676 static int corgi_pxa_pm_enter(suspend_state_t state)
 677 {
 678         unsigned long alarm_time = RTAR;
 679         unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
 680
 681         dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
 682
 683         corgi_goto_sleep(alarm_time, alarm_status, state);
 684
 685         while (corgi_enter_suspend(alarm_time, alarm_status, state))
 686                 {}
 687
 688         if (sharpsl_pm.machinfo->earlyresume)
 689                 sharpsl_pm.machinfo->earlyresume();
 690
 691         dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
 692
 693         return 0;
 694 }
 695
 696 /*
 697  * Check for fatal battery errors
 698  * Fatal returns -1
 699  */
 700 static int sharpsl_fatal_check(void)
 701 {
 702         int buff[5], temp, i, acin;
 703
 704         dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
 705
 706         /* Check AC-Adapter */
 707         acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 708
 709         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 710                 sharpsl_pm.machinfo->charge(0);
 711                 udelay(100);
 712                 sharpsl_pm.machinfo->discharge(1);      /* enable discharge */
 713                 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 714         }
 715
 716         if (sharpsl_pm.machinfo->discharge1)
 717                 sharpsl_pm.machinfo->discharge1(1);
 718
 719         /* Check battery : check inserting battery ? */
 720         for (i = 0; i < 5; i++) {
 721                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 722                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 723         }
 724
 725         if (sharpsl_pm.machinfo->discharge1)
 726                 sharpsl_pm.machinfo->discharge1(0);
 727
 728         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 729                 udelay(100);
 730                 sharpsl_pm.machinfo->charge(1);
 731                 sharpsl_pm.machinfo->discharge(0);
 732         }
 733
 734         temp = get_select_val(buff);
 735         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));
 736
 737         if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
 738                         (!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
 739                 return -1;
 740         return 0;
 741 }
 742
 743 static int sharpsl_off_charge_error(void)
 744 {
 745         dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
 746         sharpsl_pm.machinfo->charge(0);
 747         sharpsl_pm_led(SHARPSL_LED_ERROR);
 748         sharpsl_pm.charge_mode = CHRG_ERROR;
 749         return 1;
 750 }
 751
 752 /*
 753  * Charging Control while suspended
 754  * Return 1 - go straight to sleep
 755  * Return 0 - sleep or wakeup depending on other factors
 756  */
 757 static int sharpsl_off_charge_battery(void)
 758 {
 759         int time;
 760
 761         dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
 762
 763         if (sharpsl_pm.charge_mode == CHRG_OFF) {
 764                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
 765
 766                 /* AC Check */
 767                 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
 768                         return sharpsl_off_charge_error();
 769
 770                 /* Start Charging */
 771                 sharpsl_pm_led(SHARPSL_LED_ON);
 772                 sharpsl_pm.machinfo->charge(0);
 773                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 774                 sharpsl_pm.machinfo->charge(1);
 775
 776                 sharpsl_pm.charge_mode = CHRG_ON;
 777                 sharpsl_pm.full_count = 0;
 778
 779                 return 1;
 780         } else if (sharpsl_pm.charge_mode != CHRG_ON) {
 781                 return 1;
 782         }
 783
 784         if (sharpsl_pm.full_count == 0) {
 785                 int time;
 786
 787                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
 788
 789                 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
 790                         return sharpsl_off_charge_error();
 791
 792                 sharpsl_pm.machinfo->charge(0);
 793                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 794                 sharpsl_pm.machinfo->charge(1);
 795                 sharpsl_pm.charge_mode = CHRG_ON;
 796
 797                 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 798
 799                 time = RCNR;
 800                 while (1) {
 801                         /* Check if any wakeup event had occurred */
 802                         if (sharpsl_pm.machinfo->charger_wakeup() != 0)
 803                                 return 0;
 804                         /* Check for timeout */
 805                         if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
 806                                 return 1;
 807                         if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 808                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
 809                                 sharpsl_pm.full_count++;
 810                                 sharpsl_pm.machinfo->charge(0);
 811                                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 812                                 sharpsl_pm.machinfo->charge(1);
 813                                 return 1;
 814                         }
 815                 }
 816         }
 817
 818         dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
 819
 820         mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 821
 822         time = RCNR;
 823         while (1) {
 824                 /* Check if any wakeup event had occurred */
 825                 if (sharpsl_pm.machinfo->charger_wakeup())
 826                         return 0;
 827                 /* Check for timeout */
 828                 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
 829                         if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
 830                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
 831                                 sharpsl_pm.full_count = 0;
 832                         }
 833                         sharpsl_pm.full_count++;
 834                         return 1;
 835                 }
 836                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 837                         dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
 838                         sharpsl_pm_led(SHARPSL_LED_OFF);
 839                         sharpsl_pm.machinfo->charge(0);
 840                         sharpsl_pm.charge_mode = CHRG_DONE;
 841                         return 1;
 842                 }
 843         }
 844 }
 845 #else
 846 #define sharpsl_pm_suspend      NULL
 847 #define sharpsl_pm_resume       NULL
 848 #endif
 849
 850 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
 851 {
 852         return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_percent);
 853 }
 854
 855 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
 856 {
 857         return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_voltage);
 858 }
 859
 860 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
 861 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
 862
 863 extern void (*apm_get_power_status)(struct apm_power_info *);
 864
 865 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
 866 {
 867         info->ac_line_status = sharpsl_pm.battstat.ac_status;
 868
 869         if (sharpsl_pm.charge_mode == CHRG_ON)
 870                 info->battery_status = APM_BATTERY_STATUS_CHARGING;
 871         else
 872                 info->battery_status = sharpsl_pm.battstat.mainbat_status;
 873
 874         info->battery_flag = (1 << info->battery_status);
 875         info->battery_life = sharpsl_pm.battstat.mainbat_percent;
 876 }
 877
 878 #ifdef CONFIG_PM
 879 static struct platform_suspend_ops sharpsl_pm_ops = {
 880         .prepare        = pxa_pm_prepare,
 881         .finish         = pxa_pm_finish,
 882         .enter          = corgi_pxa_pm_enter,
 883         .valid          = suspend_valid_only_mem,
 884 };
 885 #endif
 886
 887 static int __devinit sharpsl_pm_probe(struct platform_device *pdev)
 888 {
 889         int ret;
 890
 891         if (!pdev->dev.platform_data)
 892                 return -EINVAL;
 893
 894         sharpsl_pm.dev = &pdev->dev;
 895         sharpsl_pm.machinfo = pdev->dev.platform_data;
 896         sharpsl_pm.charge_mode = CHRG_OFF;
 897         sharpsl_pm.flags = 0;
 898
 899         init_timer(&sharpsl_pm.ac_timer);
 900         sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
 901
 902         init_timer(&sharpsl_pm.chrg_full_timer);
 903         sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
 904
 905         led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
 906
 907         sharpsl_pm.machinfo->init();
 908
 909         gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
 910         gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
 911         gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
 912         gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
 913         gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
 914         gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
 915
 916         /* Register interrupt handlers */
 917         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)) {
 918                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin));
 919         }
 920
 921         if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
 922                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock));
 923         }
 924
 925         if (sharpsl_pm.machinfo->gpio_fatal) {
 926                 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
 927                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal));
 928                 }
 929         }
 930
 931         if (sharpsl_pm.machinfo->batfull_irq) {
 932                 /* Register interrupt handler. */
 933                 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr, IRQF_DISABLED | IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
 934                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull));
 935                 }
 936         }
 937
 938         ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
 939         ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
 940         if (ret != 0)
 941                 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
 942
 943         apm_get_power_status = sharpsl_apm_get_power_status;
 944
 945 #ifdef CONFIG_PM
 946         suspend_set_ops(&sharpsl_pm_ops);
 947 #endif
 948
 949         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 950
 951         return 0;
 952 }
 953
 954 static int sharpsl_pm_remove(struct platform_device *pdev)
 955 {
 956         suspend_set_ops(NULL);
 957
 958         device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
 959         device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
 960
 961         led_trigger_unregister_simple(sharpsl_charge_led_trigger);
 962
 963         free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
 964         free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
 965
 966         if (sharpsl_pm.machinfo->gpio_fatal)
 967                 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
 968
 969         if (sharpsl_pm.machinfo->batfull_irq)
 970                 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
 971
 972         gpio_free(sharpsl_pm.machinfo->gpio_batlock);
 973         gpio_free(sharpsl_pm.machinfo->gpio_batfull);
 974         gpio_free(sharpsl_pm.machinfo->gpio_acin);
 975
 976         if (sharpsl_pm.machinfo->exit)
 977                 sharpsl_pm.machinfo->exit();
 978
 979         del_timer_sync(&sharpsl_pm.chrg_full_timer);
 980         del_timer_sync(&sharpsl_pm.ac_timer);
 981
 982         return 0;
 983 }
 984
 985 static struct platform_driver sharpsl_pm_driver = {
 986         .probe          = sharpsl_pm_probe,
 987         .remove         = sharpsl_pm_remove,
 988         .suspend        = sharpsl_pm_suspend,
 989         .resume         = sharpsl_pm_resume,
 990         .driver         = {
 991                 .name           = "sharpsl-pm",
 992         },
 993 };
 994
 995 static int __devinit sharpsl_pm_init(void)
 996 {
 997         return platform_driver_register(&sharpsl_pm_driver);
 998 }
 999
1000 static void sharpsl_pm_exit(void)
1001 {
1002         platform_driver_unregister(&sharpsl_pm_driver);
1003 }
1004
1005 late_initcall(sharpsl_pm_init);
1006 module_exit(sharpsl_pm_exit);