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/pxa2xx-gpio.h>
  32 #include <mach/regs-rtc.h>
  33 #include <mach/sharpsl.h>
  34 #include <mach/sharpsl_pm.h>
  35
  36 #include "sharpsl.h"
  37
  38 /*
  39  * Constants
  40  */
  41 #define SHARPSL_CHARGE_ON_TIME_INTERVAL        (msecs_to_jiffies(1*60*1000))  /* 1 min */
  42 #define SHARPSL_CHARGE_FINISH_TIME             (msecs_to_jiffies(10*60*1000)) /* 10 min */
  43 #define SHARPSL_BATCHK_TIME                    (msecs_to_jiffies(15*1000))    /* 15 sec */
  44 #define SHARPSL_BATCHK_TIME_SUSPEND            (60*10)                        /* 10 min */
  45
  46 #define SHARPSL_WAIT_CO_TIME                   15  /* 15 sec */
  47 #define SHARPSL_WAIT_DISCHARGE_ON              100 /* 100 msec */
  48 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP   10  /* 10 msec */
  49 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT   10  /* 10 msec */
  50 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN   10  /* 10 msec */
  51 #define SHARPSL_CHARGE_WAIT_TIME               15  /* 15 msec */
  52 #define SHARPSL_CHARGE_CO_CHECK_TIME           5   /* 5 msec */
  53 #define SHARPSL_CHARGE_RETRY_CNT               1   /* eqv. 10 min */
  54
  55 /*
  56  * Prototypes
  57  */
  58 #ifdef CONFIG_PM
  59 static int sharpsl_off_charge_battery(void);
  60 static int sharpsl_check_battery_voltage(void);
  61 static int sharpsl_fatal_check(void);
  62 #endif
  63 static int sharpsl_check_battery_temp(void);
  64 static int sharpsl_ac_check(void);
  65 static int sharpsl_average_value(int ad);
  66 static void sharpsl_average_clear(void);
  67 static void sharpsl_charge_toggle(struct work_struct *private_);
  68 static void sharpsl_battery_thread(struct work_struct *private_);
  69
  70
  71 /*
  72  * Variables
  73  */
  74 struct sharpsl_pm_status sharpsl_pm;
  75 static DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
  76 static DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
  77 DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
  78
  79
  80
  81 struct battery_thresh sharpsl_battery_levels_acin[] = {
  82         { 213, 100},
  83         { 212,  98},
  84         { 211,  95},
  85         { 210,  93},
  86         { 209,  90},
  87         { 208,  88},
  88         { 207,  85},
  89         { 206,  83},
  90         { 205,  80},
  91         { 204,  78},
  92         { 203,  75},
  93         { 202,  73},
  94         { 201,  70},
  95         { 200,  68},
  96         { 199,  65},
  97         { 198,  63},
  98         { 197,  60},
  99         { 196,  58},
 100         { 195,  55},
 101         { 194,  53},
 102         { 193,  50},
 103         { 192,  48},
 104         { 192,  45},
 105         { 191,  43},
 106         { 191,  40},
 107         { 190,  38},
 108         { 190,  35},
 109         { 189,  33},
 110         { 188,  30},
 111         { 187,  28},
 112         { 186,  25},
 113         { 185,  23},
 114         { 184,  20},
 115         { 183,  18},
 116         { 182,  15},
 117         { 181,  13},
 118         { 180,  10},
 119         { 179,   8},
 120         { 178,   5},
 121         {   0,   0},
 122 };
 123
 124 struct battery_thresh sharpsl_battery_levels_noac[] = {
 125         { 213, 100},
 126         { 212,  98},
 127         { 211,  95},
 128         { 210,  93},
 129         { 209,  90},
 130         { 208,  88},
 131         { 207,  85},
 132         { 206,  83},
 133         { 205,  80},
 134         { 204,  78},
 135         { 203,  75},
 136         { 202,  73},
 137         { 201,  70},
 138         { 200,  68},
 139         { 199,  65},
 140         { 198,  63},
 141         { 197,  60},
 142         { 196,  58},
 143         { 195,  55},
 144         { 194,  53},
 145         { 193,  50},
 146         { 192,  48},
 147         { 191,  45},
 148         { 190,  43},
 149         { 189,  40},
 150         { 188,  38},
 151         { 187,  35},
 152         { 186,  33},
 153         { 185,  30},
 154         { 184,  28},
 155         { 183,  25},
 156         { 182,  23},
 157         { 181,  20},
 158         { 180,  18},
 159         { 179,  15},
 160         { 178,  13},
 161         { 177,  10},
 162         { 176,   8},
 163         { 175,   5},
 164         {   0,   0},
 165 };
 166
 167 /* MAX1111 Commands */
 168 #define MAXCTRL_PD0      (1u << 0)
 169 #define MAXCTRL_PD1      (1u << 1)
 170 #define MAXCTRL_SGL      (1u << 2)
 171 #define MAXCTRL_UNI      (1u << 3)
 172 #define MAXCTRL_SEL_SH   4
 173 #define MAXCTRL_STR      (1u << 7)
 174
 175 /*
 176  * Read MAX1111 ADC
 177  */
 178 int sharpsl_pm_pxa_read_max1111(int channel)
 179 {
 180         /* Ugly, better move this function into another module */
 181         if (machine_is_tosa())
 182             return 0;
 183
 184 #ifdef CONFIG_CORGI_SSP_DEPRECATED
 185         return corgi_ssp_max1111_get((channel << MAXCTRL_SEL_SH) | MAXCTRL_PD0 | MAXCTRL_PD1
 186                         | MAXCTRL_SGL | MAXCTRL_UNI | MAXCTRL_STR);
 187 #else
 188         extern int max1111_read_channel(int);
 189
 190         /* max1111 accepts channels from 0-3, however,
 191          * it is encoded from 0-7 here in the code.
 192          */
 193         return max1111_read_channel(channel >> 1);
 194 #endif
 195 }
 196
 197 static int get_percentage(int voltage)
 198 {
 199         int i = sharpsl_pm.machinfo->bat_levels - 1;
 200         int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
 201         struct battery_thresh *thresh;
 202
 203         if (sharpsl_pm.charge_mode == CHRG_ON)
 204                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
 205         else
 206                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
 207
 208         while (i > 0 && (voltage > thresh[i].voltage))
 209                 i--;
 210
 211         return thresh[i].percentage;
 212 }
 213
 214 static int get_apm_status(int voltage)
 215 {
 216         int low_thresh, high_thresh;
 217
 218         if (sharpsl_pm.charge_mode == CHRG_ON) {
 219                 high_thresh = sharpsl_pm.machinfo->status_high_acin;
 220                 low_thresh = sharpsl_pm.machinfo->status_low_acin;
 221         } else {
 222                 high_thresh = sharpsl_pm.machinfo->status_high_noac;
 223                 low_thresh = sharpsl_pm.machinfo->status_low_noac;
 224         }
 225
 226         if (voltage >= high_thresh)
 227                 return APM_BATTERY_STATUS_HIGH;
 228         if (voltage >= low_thresh)
 229                 return APM_BATTERY_STATUS_LOW;
 230         return APM_BATTERY_STATUS_CRITICAL;
 231 }
 232
 233 void sharpsl_battery_kick(void)
 234 {
 235         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
 236 }
 237 EXPORT_SYMBOL(sharpsl_battery_kick);
 238
 239
 240 static void sharpsl_battery_thread(struct work_struct *private_)
 241 {
 242         int voltage, percent, apm_status, i;
 243
 244         if (!sharpsl_pm.machinfo)
 245                 return;
 246
 247         sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
 248
 249         /* Corgi cannot confirm when battery fully charged so periodically kick! */
 250         if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
 251                         && time_after(jiffies, sharpsl_pm.charge_start_time +  SHARPSL_CHARGE_ON_TIME_INTERVAL))
 252                 schedule_delayed_work(&toggle_charger, 0);
 253
 254         for (i = 0; i < 5; i++) {
 255                 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 256                 if (voltage > 0)
 257                         break;
 258         }
 259         if (voltage <= 0) {
 260                 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
 261                 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
 262         }
 263
 264         voltage = sharpsl_average_value(voltage);
 265         apm_status = get_apm_status(voltage);
 266         percent = get_percentage(voltage);
 267
 268         /* At low battery voltages, the voltage has a tendency to start
 269            creeping back up so we try to avoid this here */
 270         if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE)
 271             || (apm_status == APM_BATTERY_STATUS_HIGH)
 272             || percent <= sharpsl_pm.battstat.mainbat_percent) {
 273                 sharpsl_pm.battstat.mainbat_voltage = voltage;
 274                 sharpsl_pm.battstat.mainbat_status = apm_status;
 275                 sharpsl_pm.battstat.mainbat_percent = percent;
 276         }
 277
 278         dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
 279                         sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
 280
 281 #ifdef CONFIG_BACKLIGHT_CORGI
 282         /* If battery is low. limit backlight intensity to save power. */
 283         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 284             && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW)
 285             || (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
 286                 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
 287                         sharpsl_pm.machinfo->backlight_limit(1);
 288                         sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
 289                 }
 290         } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
 291                 sharpsl_pm.machinfo->backlight_limit(0);
 292                 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
 293         }
 294 #endif
 295
 296         /* Suspend if critical battery level */
 297         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 298              && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
 299              && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
 300                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 301                 dev_err(sharpsl_pm.dev, "Fatal Off\n");
 302                 apm_queue_event(APM_CRITICAL_SUSPEND);
 303         }
 304
 305         schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
 306 }
 307
 308 void sharpsl_pm_led(int val)
 309 {
 310         if (val == SHARPSL_LED_ERROR) {
 311                 dev_err(sharpsl_pm.dev, "Charging Error!\n");
 312         } else if (val == SHARPSL_LED_ON) {
 313                 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
 314                 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
 315         } else {
 316                 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
 317                 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
 318         }
 319 }
 320
 321 static void sharpsl_charge_on(void)
 322 {
 323         dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
 324
 325         sharpsl_pm.full_count = 0;
 326         sharpsl_pm.charge_mode = CHRG_ON;
 327         schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
 328         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
 329 }
 330
 331 static void sharpsl_charge_off(void)
 332 {
 333         dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
 334
 335         sharpsl_pm.machinfo->charge(0);
 336         sharpsl_pm_led(SHARPSL_LED_OFF);
 337         sharpsl_pm.charge_mode = CHRG_OFF;
 338
 339         schedule_delayed_work(&sharpsl_bat, 0);
 340 }
 341
 342 static void sharpsl_charge_error(void)
 343 {
 344         sharpsl_pm_led(SHARPSL_LED_ERROR);
 345         sharpsl_pm.machinfo->charge(0);
 346         sharpsl_pm.charge_mode = CHRG_ERROR;
 347 }
 348
 349 static void sharpsl_charge_toggle(struct work_struct *private_)
 350 {
 351         dev_dbg(sharpsl_pm.dev, "Toggling Charger at time: %lx\n", jiffies);
 352
 353         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 354                 sharpsl_charge_off();
 355                 return;
 356         } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
 357                 sharpsl_charge_error();
 358                 return;
 359         }
 360
 361         sharpsl_pm_led(SHARPSL_LED_ON);
 362         sharpsl_pm.machinfo->charge(0);
 363         mdelay(SHARPSL_CHARGE_WAIT_TIME);
 364         sharpsl_pm.machinfo->charge(1);
 365
 366         sharpsl_pm.charge_start_time = jiffies;
 367 }
 368
 369 static void sharpsl_ac_timer(unsigned long data)
 370 {
 371         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 372
 373         dev_dbg(sharpsl_pm.dev, "AC Status: %d\n", acin);
 374
 375         sharpsl_average_clear();
 376         if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
 377                 sharpsl_charge_on();
 378         else if (sharpsl_pm.charge_mode == CHRG_ON)
 379                 sharpsl_charge_off();
 380
 381         schedule_delayed_work(&sharpsl_bat, 0);
 382 }
 383
 384
 385 static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
 386 {
 387         /* Delay the event slightly to debounce */
 388         /* Must be a smaller delay than the chrg_full_isr below */
 389         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 390
 391         return IRQ_HANDLED;
 392 }
 393
 394 static void sharpsl_chrg_full_timer(unsigned long data)
 395 {
 396         dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
 397
 398         sharpsl_pm.full_count++;
 399
 400         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 401                 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
 402                 if (sharpsl_pm.charge_mode == CHRG_ON)
 403                         sharpsl_charge_off();
 404         } else if (sharpsl_pm.full_count < 2) {
 405                 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
 406                 schedule_delayed_work(&toggle_charger, 0);
 407         } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
 408                 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
 409                 schedule_delayed_work(&toggle_charger, 0);
 410         } else {
 411                 sharpsl_charge_off();
 412                 sharpsl_pm.charge_mode = CHRG_DONE;
 413                 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
 414         }
 415 }
 416
 417 /* Charging Finished Interrupt (Not present on Corgi) */
 418 /* Can trigger at the same time as an AC status change so
 419    delay until after that has been processed */
 420 static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
 421 {
 422         if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
 423                 return IRQ_HANDLED;
 424
 425         /* delay until after any ac interrupt */
 426         mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
 427
 428         return IRQ_HANDLED;
 429 }
 430
 431 static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
 432 {
 433         int is_fatal = 0;
 434
 435         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
 436                 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
 437                 is_fatal = 1;
 438         }
 439
 440         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
 441                 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
 442                 is_fatal = 1;
 443         }
 444
 445         if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
 446                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 447                 apm_queue_event(APM_CRITICAL_SUSPEND);
 448         }
 449
 450         return IRQ_HANDLED;
 451 }
 452
 453 /*
 454  * Maintain an average of the last 10 readings
 455  */
 456 #define SHARPSL_CNV_VALUE_NUM    10
 457 static int sharpsl_ad_index;
 458
 459 static void sharpsl_average_clear(void)
 460 {
 461         sharpsl_ad_index = 0;
 462 }
 463
 464 static int sharpsl_average_value(int ad)
 465 {
 466         int i, ad_val = 0;
 467         static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
 468
 469         if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
 470                 sharpsl_ad_index = 0;
 471                 return ad;
 472         }
 473
 474         sharpsl_ad[sharpsl_ad_index] = ad;
 475         sharpsl_ad_index++;
 476         if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
 477                 for (i = 0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
 478                         sharpsl_ad[i] = sharpsl_ad[i+1];
 479                 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
 480         }
 481         for (i = 0; i < sharpsl_ad_index; i++)
 482                 ad_val += sharpsl_ad[i];
 483
 484         return ad_val / sharpsl_ad_index;
 485 }
 486
 487 /*
 488  * Take an array of 5 integers, remove the maximum and minimum values
 489  * and return the average.
 490  */
 491 static int get_select_val(int *val)
 492 {
 493         int i, j, k, temp, sum = 0;
 494
 495         /* Find MAX val */
 496         temp = val[0];
 497         j = 0;
 498         for (i = 1; i < 5; i++) {
 499                 if (temp < val[i]) {
 500                         temp = val[i];
 501                         j = i;
 502                 }
 503         }
 504
 505         /* Find MIN val */
 506         temp = val[4];
 507         k = 4;
 508         for (i = 3; i >= 0; i--) {
 509                 if (temp > val[i]) {
 510                         temp = val[i];
 511                         k = i;
 512                 }
 513         }
 514
 515         for (i = 0; i < 5; i++)
 516                 if (i != j && i != k)
 517                         sum += val[i];
 518
 519         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]);
 520
 521         return sum/3;
 522 }
 523
 524 static int sharpsl_check_battery_temp(void)
 525 {
 526         int val, i, buff[5];
 527
 528         /* Check battery temperature */
 529         for (i = 0; i < 5; i++) {
 530                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 531                 sharpsl_pm.machinfo->measure_temp(1);
 532                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 533                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
 534                 sharpsl_pm.machinfo->measure_temp(0);
 535         }
 536
 537         val = get_select_val(buff);
 538
 539         dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
 540         if (val > sharpsl_pm.machinfo->charge_on_temp) {
 541                 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
 542                 return -1;
 543         }
 544
 545         return 0;
 546 }
 547
 548 #ifdef CONFIG_PM
 549 static int sharpsl_check_battery_voltage(void)
 550 {
 551         int val, i, buff[5];
 552
 553         /* disable charge, enable discharge */
 554         sharpsl_pm.machinfo->charge(0);
 555         sharpsl_pm.machinfo->discharge(1);
 556         mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 557
 558         if (sharpsl_pm.machinfo->discharge1)
 559                 sharpsl_pm.machinfo->discharge1(1);
 560
 561         /* Check battery voltage */
 562         for (i = 0; i < 5; i++) {
 563                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 564                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 565         }
 566
 567         if (sharpsl_pm.machinfo->discharge1)
 568                 sharpsl_pm.machinfo->discharge1(0);
 569
 570         sharpsl_pm.machinfo->discharge(0);
 571
 572         val = get_select_val(buff);
 573         dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
 574
 575         if (val < sharpsl_pm.machinfo->charge_on_volt)
 576                 return -1;
 577
 578         return 0;
 579 }
 580 #endif
 581
 582 static int sharpsl_ac_check(void)
 583 {
 584         int temp, i, buff[5];
 585
 586         for (i = 0; i < 5; i++) {
 587                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
 588                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
 589         }
 590
 591         temp = get_select_val(buff);
 592         dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n", temp);
 593
 594         if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
 595                 dev_err(sharpsl_pm.dev, "Error: AC check failed: voltage %d.\n", temp);
 596                 return -1;
 597         }
 598
 599         return 0;
 600 }
 601
 602 #ifdef CONFIG_PM
 603 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
 604 {
 605         sharpsl_pm.flags |= SHARPSL_SUSPENDED;
 606         flush_scheduled_work();
 607
 608         if (sharpsl_pm.charge_mode == CHRG_ON)
 609                 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 610         else
 611                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 612
 613         return 0;
 614 }
 615
 616 static int sharpsl_pm_resume(struct platform_device *pdev)
 617 {
 618         /* Clear the reset source indicators as they break the bootloader upon reboot */
 619         RCSR = 0x0f;
 620         sharpsl_average_clear();
 621         sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
 622         sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
 623
 624         return 0;
 625 }
 626
 627 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 628 {
 629         dev_dbg(sharpsl_pm.dev, "Time is: %08x\n", RCNR);
 630
 631         dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n", sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
 632         /* not charging and AC-IN! */
 633
 634         if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
 635                 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
 636                 sharpsl_pm.charge_mode = CHRG_OFF;
 637                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 638                 sharpsl_off_charge_battery();
 639         }
 640
 641         sharpsl_pm.machinfo->presuspend();
 642
 643         PEDR = 0xffffffff; /* clear it */
 644
 645         sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
 646         if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
 647                 RTSR &= RTSR_ALE;
 648                 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
 649                 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n", RTAR);
 650                 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
 651         } else if (alarm_enable) {
 652                 RTSR &= RTSR_ALE;
 653                 RTAR = alarm_time;
 654                 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n", RTAR);
 655         } else {
 656                 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
 657         }
 658
 659         pxa_pm_enter(state);
 660
 661         sharpsl_pm.machinfo->postsuspend();
 662
 663         dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n", PEDR);
 664 }
 665
 666 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 667 {
 668         if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable)) {
 669                 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
 670                         dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
 671                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 672                         return 1;
 673                 }
 674                 if (sharpsl_off_charge_battery()) {
 675                         dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
 676                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 677                         return 1;
 678                 }
 679                 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
 680         }
 681
 682         if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) ||
 683             (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL))) {
 684                 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
 685                 corgi_goto_sleep(alarm_time, alarm_enable, state);
 686                 return 1;
 687         }
 688
 689         return 0;
 690 }
 691
 692 static int corgi_pxa_pm_enter(suspend_state_t state)
 693 {
 694         unsigned long alarm_time = RTAR;
 695         unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
 696
 697         dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
 698
 699         corgi_goto_sleep(alarm_time, alarm_status, state);
 700
 701         while (corgi_enter_suspend(alarm_time, alarm_status, state))
 702                 {}
 703
 704         if (sharpsl_pm.machinfo->earlyresume)
 705                 sharpsl_pm.machinfo->earlyresume();
 706
 707         dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
 708
 709         return 0;
 710 }
 711
 712 /*
 713  * Check for fatal battery errors
 714  * Fatal returns -1
 715  */
 716 static int sharpsl_fatal_check(void)
 717 {
 718         int buff[5], temp, i, acin;
 719
 720         dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
 721
 722         /* Check AC-Adapter */
 723         acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 724
 725         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 726                 sharpsl_pm.machinfo->charge(0);
 727                 udelay(100);
 728                 sharpsl_pm.machinfo->discharge(1);      /* enable discharge */
 729                 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 730         }
 731
 732         if (sharpsl_pm.machinfo->discharge1)
 733                 sharpsl_pm.machinfo->discharge1(1);
 734
 735         /* Check battery : check inserting battery ? */
 736         for (i = 0; i < 5; i++) {
 737                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 738                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 739         }
 740
 741         if (sharpsl_pm.machinfo->discharge1)
 742                 sharpsl_pm.machinfo->discharge1(0);
 743
 744         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 745                 udelay(100);
 746                 sharpsl_pm.machinfo->charge(1);
 747                 sharpsl_pm.machinfo->discharge(0);
 748         }
 749
 750         temp = get_select_val(buff);
 751         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));
 752
 753         if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
 754                         (!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
 755                 return -1;
 756         return 0;
 757 }
 758
 759 static int sharpsl_off_charge_error(void)
 760 {
 761         dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
 762         sharpsl_pm.machinfo->charge(0);
 763         sharpsl_pm_led(SHARPSL_LED_ERROR);
 764         sharpsl_pm.charge_mode = CHRG_ERROR;
 765         return 1;
 766 }
 767
 768 /*
 769  * Charging Control while suspended
 770  * Return 1 - go straight to sleep
 771  * Return 0 - sleep or wakeup depending on other factors
 772  */
 773 static int sharpsl_off_charge_battery(void)
 774 {
 775         int time;
 776
 777         dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
 778
 779         if (sharpsl_pm.charge_mode == CHRG_OFF) {
 780                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
 781
 782                 /* AC Check */
 783                 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
 784                         return sharpsl_off_charge_error();
 785
 786                 /* Start Charging */
 787                 sharpsl_pm_led(SHARPSL_LED_ON);
 788                 sharpsl_pm.machinfo->charge(0);
 789                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 790                 sharpsl_pm.machinfo->charge(1);
 791
 792                 sharpsl_pm.charge_mode = CHRG_ON;
 793                 sharpsl_pm.full_count = 0;
 794
 795                 return 1;
 796         } else if (sharpsl_pm.charge_mode != CHRG_ON) {
 797                 return 1;
 798         }
 799
 800         if (sharpsl_pm.full_count == 0) {
 801                 int time;
 802
 803                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
 804
 805                 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
 806                         return sharpsl_off_charge_error();
 807
 808                 sharpsl_pm.machinfo->charge(0);
 809                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 810                 sharpsl_pm.machinfo->charge(1);
 811                 sharpsl_pm.charge_mode = CHRG_ON;
 812
 813                 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 814
 815                 time = RCNR;
 816                 while (1) {
 817                         /* Check if any wakeup event had occurred */
 818                         if (sharpsl_pm.machinfo->charger_wakeup() != 0)
 819                                 return 0;
 820                         /* Check for timeout */
 821                         if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
 822                                 return 1;
 823                         if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 824                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
 825                                 sharpsl_pm.full_count++;
 826                                 sharpsl_pm.machinfo->charge(0);
 827                                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 828                                 sharpsl_pm.machinfo->charge(1);
 829                                 return 1;
 830                         }
 831                 }
 832         }
 833
 834         dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
 835
 836         mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 837
 838         time = RCNR;
 839         while (1) {
 840                 /* Check if any wakeup event had occurred */
 841                 if (sharpsl_pm.machinfo->charger_wakeup())
 842                         return 0;
 843                 /* Check for timeout */
 844                 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
 845                         if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
 846                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
 847                                 sharpsl_pm.full_count = 0;
 848                         }
 849                         sharpsl_pm.full_count++;
 850                         return 1;
 851                 }
 852                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 853                         dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
 854                         sharpsl_pm_led(SHARPSL_LED_OFF);
 855                         sharpsl_pm.machinfo->charge(0);
 856                         sharpsl_pm.charge_mode = CHRG_DONE;
 857                         return 1;
 858                 }
 859         }
 860 }
 861 #else
 862 #define sharpsl_pm_suspend      NULL
 863 #define sharpsl_pm_resume       NULL
 864 #endif
 865
 866 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
 867 {
 868         return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_percent);
 869 }
 870
 871 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
 872 {
 873         return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_voltage);
 874 }
 875
 876 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
 877 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
 878
 879 extern void (*apm_get_power_status)(struct apm_power_info *);
 880
 881 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
 882 {
 883         info->ac_line_status = sharpsl_pm.battstat.ac_status;
 884
 885         if (sharpsl_pm.charge_mode == CHRG_ON)
 886                 info->battery_status = APM_BATTERY_STATUS_CHARGING;
 887         else
 888                 info->battery_status = sharpsl_pm.battstat.mainbat_status;
 889
 890         info->battery_flag = (1 << info->battery_status);
 891         info->battery_life = sharpsl_pm.battstat.mainbat_percent;
 892 }
 893
 894 #ifdef CONFIG_PM
 895 static struct platform_suspend_ops sharpsl_pm_ops = {
 896         .prepare        = pxa_pm_prepare,
 897         .finish         = pxa_pm_finish,
 898         .enter          = corgi_pxa_pm_enter,
 899         .valid          = suspend_valid_only_mem,
 900 };
 901 #endif
 902
 903 static int __devinit sharpsl_pm_probe(struct platform_device *pdev)
 904 {
 905         int ret;
 906
 907         if (!pdev->dev.platform_data)
 908                 return -EINVAL;
 909
 910         sharpsl_pm.dev = &pdev->dev;
 911         sharpsl_pm.machinfo = pdev->dev.platform_data;
 912         sharpsl_pm.charge_mode = CHRG_OFF;
 913         sharpsl_pm.flags = 0;
 914
 915         init_timer(&sharpsl_pm.ac_timer);
 916         sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
 917
 918         init_timer(&sharpsl_pm.chrg_full_timer);
 919         sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
 920
 921         led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
 922
 923         sharpsl_pm.machinfo->init();
 924
 925         gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
 926         gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
 927         gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
 928         gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
 929         gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
 930         gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
 931
 932         /* Register interrupt handlers */
 933         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)) {
 934                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin));
 935         }
 936
 937         if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
 938                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock));
 939         }
 940
 941         if (sharpsl_pm.machinfo->gpio_fatal) {
 942                 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
 943                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal));
 944                 }
 945         }
 946
 947         if (sharpsl_pm.machinfo->batfull_irq) {
 948                 /* Register interrupt handler. */
 949                 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr, IRQF_DISABLED | IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
 950                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull));
 951                 }
 952         }
 953
 954         ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
 955         ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
 956         if (ret != 0)
 957                 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
 958
 959         apm_get_power_status = sharpsl_apm_get_power_status;
 960
 961 #ifdef CONFIG_PM
 962         suspend_set_ops(&sharpsl_pm_ops);
 963 #endif
 964
 965         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 966
 967         return 0;
 968 }
 969
 970 static int sharpsl_pm_remove(struct platform_device *pdev)
 971 {
 972         suspend_set_ops(NULL);
 973
 974         device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
 975         device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
 976
 977         led_trigger_unregister_simple(sharpsl_charge_led_trigger);
 978
 979         free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
 980         free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
 981
 982         if (sharpsl_pm.machinfo->gpio_fatal)
 983                 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
 984
 985         if (sharpsl_pm.machinfo->batfull_irq)
 986                 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
 987
 988         gpio_free(sharpsl_pm.machinfo->gpio_batlock);
 989         gpio_free(sharpsl_pm.machinfo->gpio_batfull);
 990         gpio_free(sharpsl_pm.machinfo->gpio_acin);
 991
 992         if (sharpsl_pm.machinfo->exit)
 993                 sharpsl_pm.machinfo->exit();
 994
 995         del_timer_sync(&sharpsl_pm.chrg_full_timer);
 996         del_timer_sync(&sharpsl_pm.ac_timer);
 997
 998         return 0;
 999 }
1000
1001 static struct platform_driver sharpsl_pm_driver = {
1002         .probe          = sharpsl_pm_probe,
1003         .remove         = sharpsl_pm_remove,
1004         .suspend        = sharpsl_pm_suspend,
1005         .resume         = sharpsl_pm_resume,
1006         .driver         = {
1007                 .name           = "sharpsl-pm",
1008         },
1009 };
1010
1011 static int __devinit sharpsl_pm_init(void)
1012 {
1013         return platform_driver_register(&sharpsl_pm_driver);
1014 }
1015
1016 static void sharpsl_pm_exit(void)
1017 {
1018         platform_driver_unregister(&sharpsl_pm_driver);
1019 }
1020
1021 late_initcall(sharpsl_pm_init);
1022 module_exit(sharpsl_pm_exit);