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 #include <linux/io.h>
  28
  29 #include <asm/mach-types.h>
  30 #include "pm.h"
  31 #include <mach/pxa2xx-regs.h>
  32 #include "regs-rtc.h"
  33 #include "sharpsl_pm.h"
  34
  35 /*
  36  * Constants
  37  */
  38 #define SHARPSL_CHARGE_ON_TIME_INTERVAL        (msecs_to_jiffies(1*60*1000))  /* 1 min */
  39 #define SHARPSL_CHARGE_FINISH_TIME             (msecs_to_jiffies(10*60*1000)) /* 10 min */
  40 #define SHARPSL_BATCHK_TIME                    (msecs_to_jiffies(15*1000))    /* 15 sec */
  41 #define SHARPSL_BATCHK_TIME_SUSPEND            (60*10)                        /* 10 min */
  42
  43 #define SHARPSL_WAIT_CO_TIME                   15  /* 15 sec */
  44 #define SHARPSL_WAIT_DISCHARGE_ON              100 /* 100 msec */
  45 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP   10  /* 10 msec */
  46 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT   10  /* 10 msec */
  47 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN   10  /* 10 msec */
  48 #define SHARPSL_CHARGE_WAIT_TIME               15  /* 15 msec */
  49 #define SHARPSL_CHARGE_CO_CHECK_TIME           5   /* 5 msec */
  50 #define SHARPSL_CHARGE_RETRY_CNT               1   /* eqv. 10 min */
  51
  52 /*
  53  * Prototypes
  54  */
  55 #ifdef CONFIG_PM
  56 static int sharpsl_off_charge_battery(void);
  57 static int sharpsl_check_battery_voltage(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 extern int max1111_read_channel(int);
 172 /*
 173  * Read MAX1111 ADC
 174  */
 175 int sharpsl_pm_pxa_read_max1111(int channel)
 176 {
 177         /* Ugly, better move this function into another module */
 178         if (machine_is_tosa())
 179             return 0;
 180
 181         /* max1111 accepts channels from 0-3, however,
 182          * it is encoded from 0-7 here in the code.
 183          */
 184         return max1111_read_channel(channel >> 1);
 185 }
 186
 187 static int get_percentage(int voltage)
 188 {
 189         int i = sharpsl_pm.machinfo->bat_levels - 1;
 190         int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
 191         struct battery_thresh *thresh;
 192
 193         if (sharpsl_pm.charge_mode == CHRG_ON)
 194                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
 195         else
 196                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
 197
 198         while (i > 0 && (voltage > thresh[i].voltage))
 199                 i--;
 200
 201         return thresh[i].percentage;
 202 }
 203
 204 static int get_apm_status(int voltage)
 205 {
 206         int low_thresh, high_thresh;
 207
 208         if (sharpsl_pm.charge_mode == CHRG_ON) {
 209                 high_thresh = sharpsl_pm.machinfo->status_high_acin;
 210                 low_thresh = sharpsl_pm.machinfo->status_low_acin;
 211         } else {
 212                 high_thresh = sharpsl_pm.machinfo->status_high_noac;
 213                 low_thresh = sharpsl_pm.machinfo->status_low_noac;
 214         }
 215
 216         if (voltage >= high_thresh)
 217                 return APM_BATTERY_STATUS_HIGH;
 218         if (voltage >= low_thresh)
 219                 return APM_BATTERY_STATUS_LOW;
 220         return APM_BATTERY_STATUS_CRITICAL;
 221 }
 222
 223 void sharpsl_battery_kick(void)
 224 {
 225         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
 226 }
 227
 228 static void sharpsl_battery_thread(struct work_struct *private_)
 229 {
 230         int voltage, percent, apm_status, i;
 231
 232         if (!sharpsl_pm.machinfo)
 233                 return;
 234
 235         sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
 236
 237         /* Corgi cannot confirm when battery fully charged so periodically kick! */
 238         if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
 239                         && time_after(jiffies, sharpsl_pm.charge_start_time +  SHARPSL_CHARGE_ON_TIME_INTERVAL))
 240                 schedule_delayed_work(&toggle_charger, 0);
 241
 242         for (i = 0; i < 5; i++) {
 243                 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 244                 if (voltage > 0)
 245                         break;
 246         }
 247         if (voltage <= 0) {
 248                 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
 249                 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
 250         }
 251
 252         voltage = sharpsl_average_value(voltage);
 253         apm_status = get_apm_status(voltage);
 254         percent = get_percentage(voltage);
 255
 256         /* At low battery voltages, the voltage has a tendency to start
 257            creeping back up so we try to avoid this here */
 258         if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE)
 259             || (apm_status == APM_BATTERY_STATUS_HIGH)
 260             || percent <= sharpsl_pm.battstat.mainbat_percent) {
 261                 sharpsl_pm.battstat.mainbat_voltage = voltage;
 262                 sharpsl_pm.battstat.mainbat_status = apm_status;
 263                 sharpsl_pm.battstat.mainbat_percent = percent;
 264         }
 265
 266         dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
 267                         sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
 268
 269         /* Suspend if critical battery level */
 270         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 271              && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
 272              && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
 273                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 274                 dev_err(sharpsl_pm.dev, "Fatal Off\n");
 275                 apm_queue_event(APM_CRITICAL_SUSPEND);
 276         }
 277
 278         schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
 279 }
 280
 281 void sharpsl_pm_led(int val)
 282 {
 283         if (val == SHARPSL_LED_ERROR) {
 284                 dev_err(sharpsl_pm.dev, "Charging Error!\n");
 285         } else if (val == SHARPSL_LED_ON) {
 286                 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
 287                 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
 288         } else {
 289                 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
 290                 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
 291         }
 292 }
 293
 294 static void sharpsl_charge_on(void)
 295 {
 296         dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
 297
 298         sharpsl_pm.full_count = 0;
 299         sharpsl_pm.charge_mode = CHRG_ON;
 300         schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
 301         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
 302 }
 303
 304 static void sharpsl_charge_off(void)
 305 {
 306         dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
 307
 308         sharpsl_pm.machinfo->charge(0);
 309         sharpsl_pm_led(SHARPSL_LED_OFF);
 310         sharpsl_pm.charge_mode = CHRG_OFF;
 311
 312         schedule_delayed_work(&sharpsl_bat, 0);
 313 }
 314
 315 static void sharpsl_charge_error(void)
 316 {
 317         sharpsl_pm_led(SHARPSL_LED_ERROR);
 318         sharpsl_pm.machinfo->charge(0);
 319         sharpsl_pm.charge_mode = CHRG_ERROR;
 320 }
 321
 322 static void sharpsl_charge_toggle(struct work_struct *private_)
 323 {
 324         dev_dbg(sharpsl_pm.dev, "Toggling Charger at time: %lx\n", jiffies);
 325
 326         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 327                 sharpsl_charge_off();
 328                 return;
 329         } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
 330                 sharpsl_charge_error();
 331                 return;
 332         }
 333
 334         sharpsl_pm_led(SHARPSL_LED_ON);
 335         sharpsl_pm.machinfo->charge(0);
 336         mdelay(SHARPSL_CHARGE_WAIT_TIME);
 337         sharpsl_pm.machinfo->charge(1);
 338
 339         sharpsl_pm.charge_start_time = jiffies;
 340 }
 341
 342 static void sharpsl_ac_timer(unsigned long data)
 343 {
 344         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 345
 346         dev_dbg(sharpsl_pm.dev, "AC Status: %d\n", acin);
 347
 348         sharpsl_average_clear();
 349         if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
 350                 sharpsl_charge_on();
 351         else if (sharpsl_pm.charge_mode == CHRG_ON)
 352                 sharpsl_charge_off();
 353
 354         schedule_delayed_work(&sharpsl_bat, 0);
 355 }
 356
 357
 358 static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
 359 {
 360         /* Delay the event slightly to debounce */
 361         /* Must be a smaller delay than the chrg_full_isr below */
 362         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 363
 364         return IRQ_HANDLED;
 365 }
 366
 367 static void sharpsl_chrg_full_timer(unsigned long data)
 368 {
 369         dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
 370
 371         sharpsl_pm.full_count++;
 372
 373         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 374                 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
 375                 if (sharpsl_pm.charge_mode == CHRG_ON)
 376                         sharpsl_charge_off();
 377         } else if (sharpsl_pm.full_count < 2) {
 378                 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
 379                 schedule_delayed_work(&toggle_charger, 0);
 380         } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
 381                 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
 382                 schedule_delayed_work(&toggle_charger, 0);
 383         } else {
 384                 sharpsl_charge_off();
 385                 sharpsl_pm.charge_mode = CHRG_DONE;
 386                 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
 387         }
 388 }
 389
 390 /* Charging Finished Interrupt (Not present on Corgi) */
 391 /* Can trigger at the same time as an AC status change so
 392    delay until after that has been processed */
 393 static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
 394 {
 395         if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
 396                 return IRQ_HANDLED;
 397
 398         /* delay until after any ac interrupt */
 399         mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
 400
 401         return IRQ_HANDLED;
 402 }
 403
 404 static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
 405 {
 406         int is_fatal = 0;
 407
 408         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
 409                 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
 410                 is_fatal = 1;
 411         }
 412
 413         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
 414                 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
 415                 is_fatal = 1;
 416         }
 417
 418         if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
 419                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 420                 apm_queue_event(APM_CRITICAL_SUSPEND);
 421         }
 422
 423         return IRQ_HANDLED;
 424 }
 425
 426 /*
 427  * Maintain an average of the last 10 readings
 428  */
 429 #define SHARPSL_CNV_VALUE_NUM    10
 430 static int sharpsl_ad_index;
 431
 432 static void sharpsl_average_clear(void)
 433 {
 434         sharpsl_ad_index = 0;
 435 }
 436
 437 static int sharpsl_average_value(int ad)
 438 {
 439         int i, ad_val = 0;
 440         static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
 441
 442         if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
 443                 sharpsl_ad_index = 0;
 444                 return ad;
 445         }
 446
 447         sharpsl_ad[sharpsl_ad_index] = ad;
 448         sharpsl_ad_index++;
 449         if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
 450                 for (i = 0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
 451                         sharpsl_ad[i] = sharpsl_ad[i+1];
 452                 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
 453         }
 454         for (i = 0; i < sharpsl_ad_index; i++)
 455                 ad_val += sharpsl_ad[i];
 456
 457         return ad_val / sharpsl_ad_index;
 458 }
 459
 460 /*
 461  * Take an array of 5 integers, remove the maximum and minimum values
 462  * and return the average.
 463  */
 464 static int get_select_val(int *val)
 465 {
 466         int i, j, k, temp, sum = 0;
 467
 468         /* Find MAX val */
 469         temp = val[0];
 470         j = 0;
 471         for (i = 1; i < 5; i++) {
 472                 if (temp < val[i]) {
 473                         temp = val[i];
 474                         j = i;
 475                 }
 476         }
 477
 478         /* Find MIN val */
 479         temp = val[4];
 480         k = 4;
 481         for (i = 3; i >= 0; i--) {
 482                 if (temp > val[i]) {
 483                         temp = val[i];
 484                         k = i;
 485                 }
 486         }
 487
 488         for (i = 0; i < 5; i++)
 489                 if (i != j && i != k)
 490                         sum += val[i];
 491
 492         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]);
 493
 494         return sum/3;
 495 }
 496
 497 static int sharpsl_check_battery_temp(void)
 498 {
 499         int val, i, buff[5];
 500
 501         /* Check battery temperature */
 502         for (i = 0; i < 5; i++) {
 503                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 504                 sharpsl_pm.machinfo->measure_temp(1);
 505                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 506                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
 507                 sharpsl_pm.machinfo->measure_temp(0);
 508         }
 509
 510         val = get_select_val(buff);
 511
 512         dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
 513         if (val > sharpsl_pm.machinfo->charge_on_temp) {
 514                 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
 515                 return -1;
 516         }
 517
 518         return 0;
 519 }
 520
 521 #ifdef CONFIG_PM
 522 static int sharpsl_check_battery_voltage(void)
 523 {
 524         int val, i, buff[5];
 525
 526         /* disable charge, enable discharge */
 527         sharpsl_pm.machinfo->charge(0);
 528         sharpsl_pm.machinfo->discharge(1);
 529         mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 530
 531         if (sharpsl_pm.machinfo->discharge1)
 532                 sharpsl_pm.machinfo->discharge1(1);
 533
 534         /* Check battery voltage */
 535         for (i = 0; i < 5; i++) {
 536                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 537                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 538         }
 539
 540         if (sharpsl_pm.machinfo->discharge1)
 541                 sharpsl_pm.machinfo->discharge1(0);
 542
 543         sharpsl_pm.machinfo->discharge(0);
 544
 545         val = get_select_val(buff);
 546         dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
 547
 548         if (val < sharpsl_pm.machinfo->charge_on_volt)
 549                 return -1;
 550
 551         return 0;
 552 }
 553 #endif
 554
 555 static int sharpsl_ac_check(void)
 556 {
 557         int temp, i, buff[5];
 558
 559         for (i = 0; i < 5; i++) {
 560                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
 561                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
 562         }
 563
 564         temp = get_select_val(buff);
 565         dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n", temp);
 566
 567         if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
 568                 dev_err(sharpsl_pm.dev, "Error: AC check failed: voltage %d.\n", temp);
 569                 return -1;
 570         }
 571
 572         return 0;
 573 }
 574
 575 #ifdef CONFIG_PM
 576 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
 577 {
 578         sharpsl_pm.flags |= SHARPSL_SUSPENDED;
 579         flush_delayed_work(&toggle_charger);
 580         flush_delayed_work(&sharpsl_bat);
 581
 582         if (sharpsl_pm.charge_mode == CHRG_ON)
 583                 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 584         else
 585                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 586
 587         return 0;
 588 }
 589
 590 static int sharpsl_pm_resume(struct platform_device *pdev)
 591 {
 592         /* Clear the reset source indicators as they break the bootloader upon reboot */
 593         RCSR = 0x0f;
 594         sharpsl_average_clear();
 595         sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
 596         sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
 597
 598         return 0;
 599 }
 600
 601 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 602 {
 603         dev_dbg(sharpsl_pm.dev, "Time is: %08x\n", RCNR);
 604
 605         dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n", sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
 606         /* not charging and AC-IN! */
 607
 608         if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
 609                 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
 610                 sharpsl_pm.charge_mode = CHRG_OFF;
 611                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 612                 sharpsl_off_charge_battery();
 613         }
 614
 615         sharpsl_pm.machinfo->presuspend();
 616
 617         PEDR = 0xffffffff; /* clear it */
 618
 619         sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
 620         if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
 621                 RTSR &= RTSR_ALE;
 622                 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
 623                 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n", RTAR);
 624                 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
 625         } else if (alarm_enable) {
 626                 RTSR &= RTSR_ALE;
 627                 RTAR = alarm_time;
 628                 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n", RTAR);
 629         } else {
 630                 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
 631         }
 632
 633         pxa_pm_enter(state);
 634
 635         sharpsl_pm.machinfo->postsuspend();
 636
 637         dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n", PEDR);
 638 }
 639
 640 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 641 {
 642         if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable)) {
 643                 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
 644                         dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
 645                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 646                         return 1;
 647                 }
 648                 if (sharpsl_off_charge_battery()) {
 649                         dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
 650                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 651                         return 1;
 652                 }
 653                 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
 654         }
 655
 656         if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) ||
 657             (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL))) {
 658                 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
 659                 corgi_goto_sleep(alarm_time, alarm_enable, state);
 660                 return 1;
 661         }
 662
 663         return 0;
 664 }
 665
 666 static int corgi_pxa_pm_enter(suspend_state_t state)
 667 {
 668         unsigned long alarm_time = RTAR;
 669         unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
 670
 671         dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
 672
 673         corgi_goto_sleep(alarm_time, alarm_status, state);
 674
 675         while (corgi_enter_suspend(alarm_time, alarm_status, state))
 676                 {}
 677
 678         if (sharpsl_pm.machinfo->earlyresume)
 679                 sharpsl_pm.machinfo->earlyresume();
 680
 681         dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
 682
 683         return 0;
 684 }
 685
 686 static int sharpsl_off_charge_error(void)
 687 {
 688         dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
 689         sharpsl_pm.machinfo->charge(0);
 690         sharpsl_pm_led(SHARPSL_LED_ERROR);
 691         sharpsl_pm.charge_mode = CHRG_ERROR;
 692         return 1;
 693 }
 694
 695 /*
 696  * Charging Control while suspended
 697  * Return 1 - go straight to sleep
 698  * Return 0 - sleep or wakeup depending on other factors
 699  */
 700 static int sharpsl_off_charge_battery(void)
 701 {
 702         int time;
 703
 704         dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
 705
 706         if (sharpsl_pm.charge_mode == CHRG_OFF) {
 707                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
 708
 709                 /* AC Check */
 710                 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
 711                         return sharpsl_off_charge_error();
 712
 713                 /* Start Charging */
 714                 sharpsl_pm_led(SHARPSL_LED_ON);
 715                 sharpsl_pm.machinfo->charge(0);
 716                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 717                 sharpsl_pm.machinfo->charge(1);
 718
 719                 sharpsl_pm.charge_mode = CHRG_ON;
 720                 sharpsl_pm.full_count = 0;
 721
 722                 return 1;
 723         } else if (sharpsl_pm.charge_mode != CHRG_ON) {
 724                 return 1;
 725         }
 726
 727         if (sharpsl_pm.full_count == 0) {
 728                 int time;
 729
 730                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
 731
 732                 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
 733                         return sharpsl_off_charge_error();
 734
 735                 sharpsl_pm.machinfo->charge(0);
 736                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 737                 sharpsl_pm.machinfo->charge(1);
 738                 sharpsl_pm.charge_mode = CHRG_ON;
 739
 740                 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 741
 742                 time = RCNR;
 743                 while (1) {
 744                         /* Check if any wakeup event had occurred */
 745                         if (sharpsl_pm.machinfo->charger_wakeup())
 746                                 return 0;
 747                         /* Check for timeout */
 748                         if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
 749                                 return 1;
 750                         if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 751                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
 752                                 sharpsl_pm.full_count++;
 753                                 sharpsl_pm.machinfo->charge(0);
 754                                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 755                                 sharpsl_pm.machinfo->charge(1);
 756                                 return 1;
 757                         }
 758                 }
 759         }
 760
 761         dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
 762
 763         mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 764
 765         time = RCNR;
 766         while (1) {
 767                 /* Check if any wakeup event had occurred */
 768                 if (sharpsl_pm.machinfo->charger_wakeup())
 769                         return 0;
 770                 /* Check for timeout */
 771                 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
 772                         if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
 773                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
 774                                 sharpsl_pm.full_count = 0;
 775                         }
 776                         sharpsl_pm.full_count++;
 777                         return 1;
 778                 }
 779                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 780                         dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
 781                         sharpsl_pm_led(SHARPSL_LED_OFF);
 782                         sharpsl_pm.machinfo->charge(0);
 783                         sharpsl_pm.charge_mode = CHRG_DONE;
 784                         return 1;
 785                 }
 786         }
 787 }
 788 #else
 789 #define sharpsl_pm_suspend      NULL
 790 #define sharpsl_pm_resume       NULL
 791 #endif
 792
 793 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
 794 {
 795         return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_percent);
 796 }
 797
 798 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
 799 {
 800         return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_voltage);
 801 }
 802
 803 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
 804 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
 805
 806 extern void (*apm_get_power_status)(struct apm_power_info *);
 807
 808 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
 809 {
 810         info->ac_line_status = sharpsl_pm.battstat.ac_status;
 811
 812         if (sharpsl_pm.charge_mode == CHRG_ON)
 813                 info->battery_status = APM_BATTERY_STATUS_CHARGING;
 814         else
 815                 info->battery_status = sharpsl_pm.battstat.mainbat_status;
 816
 817         info->battery_flag = (1 << info->battery_status);
 818         info->battery_life = sharpsl_pm.battstat.mainbat_percent;
 819 }
 820
 821 #ifdef CONFIG_PM
 822 static const struct platform_suspend_ops sharpsl_pm_ops = {
 823         .prepare        = pxa_pm_prepare,
 824         .finish         = pxa_pm_finish,
 825         .enter          = corgi_pxa_pm_enter,
 826         .valid          = suspend_valid_only_mem,
 827 };
 828 #endif
 829
 830 static int sharpsl_pm_probe(struct platform_device *pdev)
 831 {
 832         int ret, irq;
 833
 834         if (!pdev->dev.platform_data)
 835                 return -EINVAL;
 836
 837         sharpsl_pm.dev = &pdev->dev;
 838         sharpsl_pm.machinfo = pdev->dev.platform_data;
 839         sharpsl_pm.charge_mode = CHRG_OFF;
 840         sharpsl_pm.flags = 0;
 841
 842         setup_timer(&sharpsl_pm.ac_timer, sharpsl_ac_timer, 0UL);
 843
 844         setup_timer(&sharpsl_pm.chrg_full_timer, sharpsl_chrg_full_timer, 0UL);
 845
 846         led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
 847
 848         sharpsl_pm.machinfo->init();
 849
 850         gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
 851         gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
 852         gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
 853         gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
 854         gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
 855         gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
 856
 857         /* Register interrupt handlers */
 858         irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_acin);
 859         if (request_irq(irq, sharpsl_ac_isr, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "AC Input Detect", sharpsl_ac_isr)) {
 860                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
 861         }
 862
 863         irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock);
 864         if (request_irq(irq, sharpsl_fatal_isr, IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
 865                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
 866         }
 867
 868         if (sharpsl_pm.machinfo->gpio_fatal) {
 869                 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal);
 870                 if (request_irq(irq, sharpsl_fatal_isr, IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
 871                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
 872                 }
 873         }
 874
 875         if (sharpsl_pm.machinfo->batfull_irq) {
 876                 /* Register interrupt handler. */
 877                 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull);
 878                 if (request_irq(irq, sharpsl_chrg_full_isr, IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
 879                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
 880                 }
 881         }
 882
 883         ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
 884         ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
 885         if (ret != 0)
 886                 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
 887
 888         apm_get_power_status = sharpsl_apm_get_power_status;
 889
 890 #ifdef CONFIG_PM
 891         suspend_set_ops(&sharpsl_pm_ops);
 892 #endif
 893
 894         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 895
 896         return 0;
 897 }
 898
 899 static int sharpsl_pm_remove(struct platform_device *pdev)
 900 {
 901         suspend_set_ops(NULL);
 902
 903         device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
 904         device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
 905
 906         led_trigger_unregister_simple(sharpsl_charge_led_trigger);
 907
 908         free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
 909         free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
 910
 911         if (sharpsl_pm.machinfo->gpio_fatal)
 912                 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
 913
 914         if (sharpsl_pm.machinfo->batfull_irq)
 915                 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
 916
 917         gpio_free(sharpsl_pm.machinfo->gpio_batlock);
 918         gpio_free(sharpsl_pm.machinfo->gpio_batfull);
 919         gpio_free(sharpsl_pm.machinfo->gpio_acin);
 920
 921         if (sharpsl_pm.machinfo->exit)
 922                 sharpsl_pm.machinfo->exit();
 923
 924         del_timer_sync(&sharpsl_pm.chrg_full_timer);
 925         del_timer_sync(&sharpsl_pm.ac_timer);
 926
 927         return 0;
 928 }
 929
 930 static struct platform_driver sharpsl_pm_driver = {
 931         .probe          = sharpsl_pm_probe,
 932         .remove         = sharpsl_pm_remove,
 933         .suspend        = sharpsl_pm_suspend,
 934         .resume         = sharpsl_pm_resume,
 935         .driver         = {
 936                 .name           = "sharpsl-pm",
 937         },
 938 };
 939
 940 static int sharpsl_pm_init(void)
 941 {
 942         return platform_driver_register(&sharpsl_pm_driver);
 943 }
 944
 945 static void sharpsl_pm_exit(void)
 946 {
 947         platform_driver_unregister(&sharpsl_pm_driver);
 948 }
 949
 950 late_initcall(sharpsl_pm_init);
 951 module_exit(sharpsl_pm_exit);