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