arch/arm/mach-pxa/sharpsl_pm.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Battery and Power Management code for the Sharp SL-C7xx and SL-Cxx00
   4  * series of PDAs
   5  *
   6  * Copyright (c) 2004-2005 Richard Purdie
   7  *
   8  * Based on code written by Sharp for 2.4 kernels
   9  */
  10
  11 #undef DEBUG
  12
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/apm-emulation.h>
  18 #include <linux/timer.h>
  19 #include <linux/delay.h>
  20 #include <linux/leds.h>
  21 #include <linux/suspend.h>
  22 #include <linux/gpio.h>
  23 #include <linux/io.h>
  24
  25 #include <asm/mach-types.h>
  26 #include "pm.h"
  27 #include "pxa2xx-regs.h"
  28 #include "regs-rtc.h"
  29 #include "sharpsl_pm.h"
  30
  31 /*
  32  * Constants
  33  */
  34 #define SHARPSL_CHARGE_ON_TIME_INTERVAL        (msecs_to_jiffies(1*60*1000))  /* 1 min */
  35 #define SHARPSL_CHARGE_FINISH_TIME             (msecs_to_jiffies(10*60*1000)) /* 10 min */
  36 #define SHARPSL_BATCHK_TIME                    (msecs_to_jiffies(15*1000))    /* 15 sec */
  37 #define SHARPSL_BATCHK_TIME_SUSPEND            (60*10)                        /* 10 min */
  38
  39 #define SHARPSL_WAIT_CO_TIME                   15  /* 15 sec */
  40 #define SHARPSL_WAIT_DISCHARGE_ON              100 /* 100 msec */
  41 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP   10  /* 10 msec */
  42 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT   10  /* 10 msec */
  43 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN   10  /* 10 msec */
  44 #define SHARPSL_CHARGE_WAIT_TIME               15  /* 15 msec */
  45 #define SHARPSL_CHARGE_CO_CHECK_TIME           5   /* 5 msec */
  46 #define SHARPSL_CHARGE_RETRY_CNT               1   /* eqv. 10 min */
  47
  48 /*
  49  * Prototypes
  50  */
  51 #ifdef CONFIG_PM
  52 static int sharpsl_off_charge_battery(void);
  53 static int sharpsl_check_battery_voltage(void);
  54 #endif
  55 static int sharpsl_check_battery_temp(void);
  56 static int sharpsl_ac_check(void);
  57 static int sharpsl_average_value(int ad);
  58 static void sharpsl_average_clear(void);
  59 static void sharpsl_charge_toggle(struct work_struct *private_);
  60 static void sharpsl_battery_thread(struct work_struct *private_);
  61
  62
  63 /*
  64  * Variables
  65  */
  66 struct sharpsl_pm_status sharpsl_pm;
  67 static DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
  68 static DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
  69 DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
  70
  71
  72
  73 struct battery_thresh sharpsl_battery_levels_acin[] = {
  74         { 213, 100},
  75         { 212,  98},
  76         { 211,  95},
  77         { 210,  93},
  78         { 209,  90},
  79         { 208,  88},
  80         { 207,  85},
  81         { 206,  83},
  82         { 205,  80},
  83         { 204,  78},
  84         { 203,  75},
  85         { 202,  73},
  86         { 201,  70},
  87         { 200,  68},
  88         { 199,  65},
  89         { 198,  63},
  90         { 197,  60},
  91         { 196,  58},
  92         { 195,  55},
  93         { 194,  53},
  94         { 193,  50},
  95         { 192,  48},
  96         { 192,  45},
  97         { 191,  43},
  98         { 191,  40},
  99         { 190,  38},
 100         { 190,  35},
 101         { 189,  33},
 102         { 188,  30},
 103         { 187,  28},
 104         { 186,  25},
 105         { 185,  23},
 106         { 184,  20},
 107         { 183,  18},
 108         { 182,  15},
 109         { 181,  13},
 110         { 180,  10},
 111         { 179,   8},
 112         { 178,   5},
 113         {   0,   0},
 114 };
 115
 116 struct battery_thresh sharpsl_battery_levels_noac[] = {
 117         { 213, 100},
 118         { 212,  98},
 119         { 211,  95},
 120         { 210,  93},
 121         { 209,  90},
 122         { 208,  88},
 123         { 207,  85},
 124         { 206,  83},
 125         { 205,  80},
 126         { 204,  78},
 127         { 203,  75},
 128         { 202,  73},
 129         { 201,  70},
 130         { 200,  68},
 131         { 199,  65},
 132         { 198,  63},
 133         { 197,  60},
 134         { 196,  58},
 135         { 195,  55},
 136         { 194,  53},
 137         { 193,  50},
 138         { 192,  48},
 139         { 191,  45},
 140         { 190,  43},
 141         { 189,  40},
 142         { 188,  38},
 143         { 187,  35},
 144         { 186,  33},
 145         { 185,  30},
 146         { 184,  28},
 147         { 183,  25},
 148         { 182,  23},
 149         { 181,  20},
 150         { 180,  18},
 151         { 179,  15},
 152         { 178,  13},
 153         { 177,  10},
 154         { 176,   8},
 155         { 175,   5},
 156         {   0,   0},
 157 };
 158
 159 /* MAX1111 Commands */
 160 #define MAXCTRL_PD0      (1u << 0)
 161 #define MAXCTRL_PD1      (1u << 1)
 162 #define MAXCTRL_SGL      (1u << 2)
 163 #define MAXCTRL_UNI      (1u << 3)
 164 #define MAXCTRL_SEL_SH   4
 165 #define MAXCTRL_STR      (1u << 7)
 166
 167 extern int max1111_read_channel(int);
 168 /*
 169  * Read MAX1111 ADC
 170  */
 171 int sharpsl_pm_pxa_read_max1111(int channel)
 172 {
 173         /* Ugly, better move this function into another module */
 174         if (machine_is_tosa())
 175             return 0;
 176
 177         /* max1111 accepts channels from 0-3, however,
 178          * it is encoded from 0-7 here in the code.
 179          */
 180         return max1111_read_channel(channel >> 1);
 181 }
 182
 183 static int get_percentage(int voltage)
 184 {
 185         int i = sharpsl_pm.machinfo->bat_levels - 1;
 186         int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
 187         struct battery_thresh *thresh;
 188
 189         if (sharpsl_pm.charge_mode == CHRG_ON)
 190                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
 191         else
 192                 thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
 193
 194         while (i > 0 && (voltage > thresh[i].voltage))
 195                 i--;
 196
 197         return thresh[i].percentage;
 198 }
 199
 200 static int get_apm_status(int voltage)
 201 {
 202         int low_thresh, high_thresh;
 203
 204         if (sharpsl_pm.charge_mode == CHRG_ON) {
 205                 high_thresh = sharpsl_pm.machinfo->status_high_acin;
 206                 low_thresh = sharpsl_pm.machinfo->status_low_acin;
 207         } else {
 208                 high_thresh = sharpsl_pm.machinfo->status_high_noac;
 209                 low_thresh = sharpsl_pm.machinfo->status_low_noac;
 210         }
 211
 212         if (voltage >= high_thresh)
 213                 return APM_BATTERY_STATUS_HIGH;
 214         if (voltage >= low_thresh)
 215                 return APM_BATTERY_STATUS_LOW;
 216         return APM_BATTERY_STATUS_CRITICAL;
 217 }
 218
 219 void sharpsl_battery_kick(void)
 220 {
 221         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
 222 }
 223
 224 static void sharpsl_battery_thread(struct work_struct *private_)
 225 {
 226         int voltage, percent, apm_status, i;
 227
 228         if (!sharpsl_pm.machinfo)
 229                 return;
 230
 231         sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
 232
 233         /* Corgi cannot confirm when battery fully charged so periodically kick! */
 234         if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
 235                         && time_after(jiffies, sharpsl_pm.charge_start_time +  SHARPSL_CHARGE_ON_TIME_INTERVAL))
 236                 schedule_delayed_work(&toggle_charger, 0);
 237
 238         for (i = 0; i < 5; i++) {
 239                 voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 240                 if (voltage > 0)
 241                         break;
 242         }
 243         if (voltage <= 0) {
 244                 voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
 245                 dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
 246         }
 247
 248         voltage = sharpsl_average_value(voltage);
 249         apm_status = get_apm_status(voltage);
 250         percent = get_percentage(voltage);
 251
 252         /* At low battery voltages, the voltage has a tendency to start
 253            creeping back up so we try to avoid this here */
 254         if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE)
 255             || (apm_status == APM_BATTERY_STATUS_HIGH)
 256             || percent <= sharpsl_pm.battstat.mainbat_percent) {
 257                 sharpsl_pm.battstat.mainbat_voltage = voltage;
 258                 sharpsl_pm.battstat.mainbat_status = apm_status;
 259                 sharpsl_pm.battstat.mainbat_percent = percent;
 260         }
 261
 262         dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
 263                         sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
 264
 265         /* Suspend if critical battery level */
 266         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 267              && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
 268              && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
 269                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 270                 dev_err(sharpsl_pm.dev, "Fatal Off\n");
 271                 apm_queue_event(APM_CRITICAL_SUSPEND);
 272         }
 273
 274         schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
 275 }
 276
 277 void sharpsl_pm_led(int val)
 278 {
 279         if (val == SHARPSL_LED_ERROR) {
 280                 dev_err(sharpsl_pm.dev, "Charging Error!\n");
 281         } else if (val == SHARPSL_LED_ON) {
 282                 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
 283                 led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
 284         } else {
 285                 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
 286                 led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
 287         }
 288 }
 289
 290 static void sharpsl_charge_on(void)
 291 {
 292         dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
 293
 294         sharpsl_pm.full_count = 0;
 295         sharpsl_pm.charge_mode = CHRG_ON;
 296         schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
 297         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
 298 }
 299
 300 static void sharpsl_charge_off(void)
 301 {
 302         dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
 303
 304         sharpsl_pm.machinfo->charge(0);
 305         sharpsl_pm_led(SHARPSL_LED_OFF);
 306         sharpsl_pm.charge_mode = CHRG_OFF;
 307
 308         schedule_delayed_work(&sharpsl_bat, 0);
 309 }
 310
 311 static void sharpsl_charge_error(void)
 312 {
 313         sharpsl_pm_led(SHARPSL_LED_ERROR);
 314         sharpsl_pm.machinfo->charge(0);
 315         sharpsl_pm.charge_mode = CHRG_ERROR;
 316 }
 317
 318 static void sharpsl_charge_toggle(struct work_struct *private_)
 319 {
 320         dev_dbg(sharpsl_pm.dev, "Toggling Charger at time: %lx\n", jiffies);
 321
 322         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 323                 sharpsl_charge_off();
 324                 return;
 325         } else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
 326                 sharpsl_charge_error();
 327                 return;
 328         }
 329
 330         sharpsl_pm_led(SHARPSL_LED_ON);
 331         sharpsl_pm.machinfo->charge(0);
 332         mdelay(SHARPSL_CHARGE_WAIT_TIME);
 333         sharpsl_pm.machinfo->charge(1);
 334
 335         sharpsl_pm.charge_start_time = jiffies;
 336 }
 337
 338 static void sharpsl_ac_timer(struct timer_list *unused)
 339 {
 340         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 341
 342         dev_dbg(sharpsl_pm.dev, "AC Status: %d\n", acin);
 343
 344         sharpsl_average_clear();
 345         if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
 346                 sharpsl_charge_on();
 347         else if (sharpsl_pm.charge_mode == CHRG_ON)
 348                 sharpsl_charge_off();
 349
 350         schedule_delayed_work(&sharpsl_bat, 0);
 351 }
 352
 353
 354 static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
 355 {
 356         /* Delay the event slightly to debounce */
 357         /* Must be a smaller delay than the chrg_full_isr below */
 358         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 359
 360         return IRQ_HANDLED;
 361 }
 362
 363 static void sharpsl_chrg_full_timer(struct timer_list *unused)
 364 {
 365         dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
 366
 367         sharpsl_pm.full_count++;
 368
 369         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 370                 dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
 371                 if (sharpsl_pm.charge_mode == CHRG_ON)
 372                         sharpsl_charge_off();
 373         } else if (sharpsl_pm.full_count < 2) {
 374                 dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
 375                 schedule_delayed_work(&toggle_charger, 0);
 376         } else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
 377                 dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
 378                 schedule_delayed_work(&toggle_charger, 0);
 379         } else {
 380                 sharpsl_charge_off();
 381                 sharpsl_pm.charge_mode = CHRG_DONE;
 382                 dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
 383         }
 384 }
 385
 386 /* Charging Finished Interrupt (Not present on Corgi) */
 387 /* Can trigger at the same time as an AC status change so
 388    delay until after that has been processed */
 389 static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
 390 {
 391         if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
 392                 return IRQ_HANDLED;
 393
 394         /* delay until after any ac interrupt */
 395         mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
 396
 397         return IRQ_HANDLED;
 398 }
 399
 400 static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
 401 {
 402         int is_fatal = 0;
 403
 404         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
 405                 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
 406                 is_fatal = 1;
 407         }
 408
 409         if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
 410                 dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
 411                 is_fatal = 1;
 412         }
 413
 414         if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
 415                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 416                 apm_queue_event(APM_CRITICAL_SUSPEND);
 417         }
 418
 419         return IRQ_HANDLED;
 420 }
 421
 422 /*
 423  * Maintain an average of the last 10 readings
 424  */
 425 #define SHARPSL_CNV_VALUE_NUM    10
 426 static int sharpsl_ad_index;
 427
 428 static void sharpsl_average_clear(void)
 429 {
 430         sharpsl_ad_index = 0;
 431 }
 432
 433 static int sharpsl_average_value(int ad)
 434 {
 435         int i, ad_val = 0;
 436         static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
 437
 438         if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
 439                 sharpsl_ad_index = 0;
 440                 return ad;
 441         }
 442
 443         sharpsl_ad[sharpsl_ad_index] = ad;
 444         sharpsl_ad_index++;
 445         if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
 446                 for (i = 0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
 447                         sharpsl_ad[i] = sharpsl_ad[i+1];
 448                 sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
 449         }
 450         for (i = 0; i < sharpsl_ad_index; i++)
 451                 ad_val += sharpsl_ad[i];
 452
 453         return ad_val / sharpsl_ad_index;
 454 }
 455
 456 /*
 457  * Take an array of 5 integers, remove the maximum and minimum values
 458  * and return the average.
 459  */
 460 static int get_select_val(int *val)
 461 {
 462         int i, j, k, temp, sum = 0;
 463
 464         /* Find MAX val */
 465         temp = val[0];
 466         j = 0;
 467         for (i = 1; i < 5; i++) {
 468                 if (temp < val[i]) {
 469                         temp = val[i];
 470                         j = i;
 471                 }
 472         }
 473
 474         /* Find MIN val */
 475         temp = val[4];
 476         k = 4;
 477         for (i = 3; i >= 0; i--) {
 478                 if (temp > val[i]) {
 479                         temp = val[i];
 480                         k = i;
 481                 }
 482         }
 483
 484         for (i = 0; i < 5; i++)
 485                 if (i != j && i != k)
 486                         sum += val[i];
 487
 488         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]);
 489
 490         return sum/3;
 491 }
 492
 493 static int sharpsl_check_battery_temp(void)
 494 {
 495         int val, i, buff[5];
 496
 497         /* Check battery temperature */
 498         for (i = 0; i < 5; i++) {
 499                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 500                 sharpsl_pm.machinfo->measure_temp(1);
 501                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 502                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
 503                 sharpsl_pm.machinfo->measure_temp(0);
 504         }
 505
 506         val = get_select_val(buff);
 507
 508         dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
 509         if (val > sharpsl_pm.machinfo->charge_on_temp) {
 510                 printk(KERN_WARNING "Not charging: temperature out of limits.\n");
 511                 return -1;
 512         }
 513
 514         return 0;
 515 }
 516
 517 #ifdef CONFIG_PM
 518 static int sharpsl_check_battery_voltage(void)
 519 {
 520         int val, i, buff[5];
 521
 522         /* disable charge, enable discharge */
 523         sharpsl_pm.machinfo->charge(0);
 524         sharpsl_pm.machinfo->discharge(1);
 525         mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 526
 527         if (sharpsl_pm.machinfo->discharge1)
 528                 sharpsl_pm.machinfo->discharge1(1);
 529
 530         /* Check battery voltage */
 531         for (i = 0; i < 5; i++) {
 532                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
 533                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 534         }
 535
 536         if (sharpsl_pm.machinfo->discharge1)
 537                 sharpsl_pm.machinfo->discharge1(0);
 538
 539         sharpsl_pm.machinfo->discharge(0);
 540
 541         val = get_select_val(buff);
 542         dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
 543
 544         if (val < sharpsl_pm.machinfo->charge_on_volt)
 545                 return -1;
 546
 547         return 0;
 548 }
 549 #endif
 550
 551 static int sharpsl_ac_check(void)
 552 {
 553         int temp, i, buff[5];
 554
 555         for (i = 0; i < 5; i++) {
 556                 buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
 557                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
 558         }
 559
 560         temp = get_select_val(buff);
 561         dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n", temp);
 562
 563         if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
 564                 dev_err(sharpsl_pm.dev, "Error: AC check failed: voltage %d.\n", temp);
 565                 return -1;
 566         }
 567
 568         return 0;
 569 }
 570
 571 #ifdef CONFIG_PM
 572 static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
 573 {
 574         sharpsl_pm.flags |= SHARPSL_SUSPENDED;
 575         flush_delayed_work(&toggle_charger);
 576         flush_delayed_work(&sharpsl_bat);
 577
 578         if (sharpsl_pm.charge_mode == CHRG_ON)
 579                 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 580         else
 581                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 582
 583         return 0;
 584 }
 585
 586 static int sharpsl_pm_resume(struct platform_device *pdev)
 587 {
 588         /* Clear the reset source indicators as they break the bootloader upon reboot */
 589         RCSR = 0x0f;
 590         sharpsl_average_clear();
 591         sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
 592         sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
 593
 594         return 0;
 595 }
 596
 597 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 598 {
 599         dev_dbg(sharpsl_pm.dev, "Time is: %08x\n", RCNR);
 600
 601         dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n", sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
 602         /* not charging and AC-IN! */
 603
 604         if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
 605                 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
 606                 sharpsl_pm.charge_mode = CHRG_OFF;
 607                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 608                 sharpsl_off_charge_battery();
 609         }
 610
 611         sharpsl_pm.machinfo->presuspend();
 612
 613         PEDR = 0xffffffff; /* clear it */
 614
 615         sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
 616         if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
 617                 RTSR &= RTSR_ALE;
 618                 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
 619                 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n", RTAR);
 620                 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
 621         } else if (alarm_enable) {
 622                 RTSR &= RTSR_ALE;
 623                 RTAR = alarm_time;
 624                 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n", RTAR);
 625         } else {
 626                 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
 627         }
 628
 629         pxa_pm_enter(state);
 630
 631         sharpsl_pm.machinfo->postsuspend();
 632
 633         dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n", PEDR);
 634 }
 635
 636 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 637 {
 638         if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable)) {
 639                 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
 640                         dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
 641                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 642                         return 1;
 643                 }
 644                 if (sharpsl_off_charge_battery()) {
 645                         dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
 646                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 647                         return 1;
 648                 }
 649                 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
 650         }
 651
 652         if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) ||
 653             (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL))) {
 654                 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
 655                 corgi_goto_sleep(alarm_time, alarm_enable, state);
 656                 return 1;
 657         }
 658
 659         return 0;
 660 }
 661
 662 static int corgi_pxa_pm_enter(suspend_state_t state)
 663 {
 664         unsigned long alarm_time = RTAR;
 665         unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
 666
 667         dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
 668
 669         corgi_goto_sleep(alarm_time, alarm_status, state);
 670
 671         while (corgi_enter_suspend(alarm_time, alarm_status, state))
 672                 {}
 673
 674         if (sharpsl_pm.machinfo->earlyresume)
 675                 sharpsl_pm.machinfo->earlyresume();
 676
 677         dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
 678
 679         return 0;
 680 }
 681
 682 static int sharpsl_off_charge_error(void)
 683 {
 684         dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
 685         sharpsl_pm.machinfo->charge(0);
 686         sharpsl_pm_led(SHARPSL_LED_ERROR);
 687         sharpsl_pm.charge_mode = CHRG_ERROR;
 688         return 1;
 689 }
 690
 691 /*
 692  * Charging Control while suspended
 693  * Return 1 - go straight to sleep
 694  * Return 0 - sleep or wakeup depending on other factors
 695  */
 696 static int sharpsl_off_charge_battery(void)
 697 {
 698         int time;
 699
 700         dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
 701
 702         if (sharpsl_pm.charge_mode == CHRG_OFF) {
 703                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
 704
 705                 /* AC Check */
 706                 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
 707                         return sharpsl_off_charge_error();
 708
 709                 /* Start Charging */
 710                 sharpsl_pm_led(SHARPSL_LED_ON);
 711                 sharpsl_pm.machinfo->charge(0);
 712                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 713                 sharpsl_pm.machinfo->charge(1);
 714
 715                 sharpsl_pm.charge_mode = CHRG_ON;
 716                 sharpsl_pm.full_count = 0;
 717
 718                 return 1;
 719         } else if (sharpsl_pm.charge_mode != CHRG_ON) {
 720                 return 1;
 721         }
 722
 723         if (sharpsl_pm.full_count == 0) {
 724                 int time;
 725
 726                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
 727
 728                 if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
 729                         return sharpsl_off_charge_error();
 730
 731                 sharpsl_pm.machinfo->charge(0);
 732                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 733                 sharpsl_pm.machinfo->charge(1);
 734                 sharpsl_pm.charge_mode = CHRG_ON;
 735
 736                 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 737
 738                 time = RCNR;
 739                 while (1) {
 740                         /* Check if any wakeup event had occurred */
 741                         if (sharpsl_pm.machinfo->charger_wakeup())
 742                                 return 0;
 743                         /* Check for timeout */
 744                         if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
 745                                 return 1;
 746                         if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 747                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
 748                                 sharpsl_pm.full_count++;
 749                                 sharpsl_pm.machinfo->charge(0);
 750                                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 751                                 sharpsl_pm.machinfo->charge(1);
 752                                 return 1;
 753                         }
 754                 }
 755         }
 756
 757         dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
 758
 759         mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 760
 761         time = RCNR;
 762         while (1) {
 763                 /* Check if any wakeup event had occurred */
 764                 if (sharpsl_pm.machinfo->charger_wakeup())
 765                         return 0;
 766                 /* Check for timeout */
 767                 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
 768                         if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
 769                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
 770                                 sharpsl_pm.full_count = 0;
 771                         }
 772                         sharpsl_pm.full_count++;
 773                         return 1;
 774                 }
 775                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
 776                         dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
 777                         sharpsl_pm_led(SHARPSL_LED_OFF);
 778                         sharpsl_pm.machinfo->charge(0);
 779                         sharpsl_pm.charge_mode = CHRG_DONE;
 780                         return 1;
 781                 }
 782         }
 783 }
 784 #else
 785 #define sharpsl_pm_suspend      NULL
 786 #define sharpsl_pm_resume       NULL
 787 #endif
 788
 789 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
 790 {
 791         return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_percent);
 792 }
 793
 794 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
 795 {
 796         return sprintf(buf, "%d\n", sharpsl_pm.battstat.mainbat_voltage);
 797 }
 798
 799 static DEVICE_ATTR_RO(battery_percentage);
 800 static DEVICE_ATTR_RO(battery_voltage);
 801
 802 extern void (*apm_get_power_status)(struct apm_power_info *);
 803
 804 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
 805 {
 806         info->ac_line_status = sharpsl_pm.battstat.ac_status;
 807
 808         if (sharpsl_pm.charge_mode == CHRG_ON)
 809                 info->battery_status = APM_BATTERY_STATUS_CHARGING;
 810         else
 811                 info->battery_status = sharpsl_pm.battstat.mainbat_status;
 812
 813         info->battery_flag = (1 << info->battery_status);
 814         info->battery_life = sharpsl_pm.battstat.mainbat_percent;
 815 }
 816
 817 #ifdef CONFIG_PM
 818 static const struct platform_suspend_ops sharpsl_pm_ops = {
 819         .prepare        = pxa_pm_prepare,
 820         .finish         = pxa_pm_finish,
 821         .enter          = corgi_pxa_pm_enter,
 822         .valid          = suspend_valid_only_mem,
 823 };
 824 #endif
 825
 826 static int sharpsl_pm_probe(struct platform_device *pdev)
 827 {
 828         int ret, irq;
 829
 830         if (!pdev->dev.platform_data)
 831                 return -EINVAL;
 832
 833         sharpsl_pm.dev = &pdev->dev;
 834         sharpsl_pm.machinfo = pdev->dev.platform_data;
 835         sharpsl_pm.charge_mode = CHRG_OFF;
 836         sharpsl_pm.flags = 0;
 837
 838         timer_setup(&sharpsl_pm.ac_timer, sharpsl_ac_timer, 0);
 839
 840         timer_setup(&sharpsl_pm.chrg_full_timer, sharpsl_chrg_full_timer, 0);
 841
 842         led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
 843
 844         sharpsl_pm.machinfo->init();
 845
 846         gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
 847         gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
 848         gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
 849         gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
 850         gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
 851         gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
 852
 853         /* Register interrupt handlers */
 854         irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_acin);
 855         if (request_irq(irq, sharpsl_ac_isr, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "AC Input Detect", sharpsl_ac_isr)) {
 856                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
 857         }
 858
 859         irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock);
 860         if (request_irq(irq, sharpsl_fatal_isr, IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
 861                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
 862         }
 863
 864         if (sharpsl_pm.machinfo->gpio_fatal) {
 865                 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal);
 866                 if (request_irq(irq, sharpsl_fatal_isr, IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
 867                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
 868                 }
 869         }
 870
 871         if (sharpsl_pm.machinfo->batfull_irq) {
 872                 /* Register interrupt handler. */
 873                 irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull);
 874                 if (request_irq(irq, sharpsl_chrg_full_isr, IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
 875                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
 876                 }
 877         }
 878
 879         ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
 880         ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
 881         if (ret != 0)
 882                 dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
 883
 884         apm_get_power_status = sharpsl_apm_get_power_status;
 885
 886 #ifdef CONFIG_PM
 887         suspend_set_ops(&sharpsl_pm_ops);
 888 #endif
 889
 890         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 891
 892         return 0;
 893 }
 894
 895 static int sharpsl_pm_remove(struct platform_device *pdev)
 896 {
 897         suspend_set_ops(NULL);
 898
 899         device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
 900         device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
 901
 902         led_trigger_unregister_simple(sharpsl_charge_led_trigger);
 903
 904         free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
 905         free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
 906
 907         if (sharpsl_pm.machinfo->gpio_fatal)
 908                 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
 909
 910         if (sharpsl_pm.machinfo->batfull_irq)
 911                 free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
 912
 913         gpio_free(sharpsl_pm.machinfo->gpio_batlock);
 914         gpio_free(sharpsl_pm.machinfo->gpio_batfull);
 915         gpio_free(sharpsl_pm.machinfo->gpio_acin);
 916
 917         if (sharpsl_pm.machinfo->exit)
 918                 sharpsl_pm.machinfo->exit();
 919
 920         del_timer_sync(&sharpsl_pm.chrg_full_timer);
 921         del_timer_sync(&sharpsl_pm.ac_timer);
 922
 923         return 0;
 924 }
 925
 926 static struct platform_driver sharpsl_pm_driver = {
 927         .probe          = sharpsl_pm_probe,
 928         .remove         = sharpsl_pm_remove,
 929         .suspend        = sharpsl_pm_suspend,
 930         .resume         = sharpsl_pm_resume,
 931         .driver         = {
 932                 .name           = "sharpsl-pm",
 933         },
 934 };
 935
 936 static int sharpsl_pm_init(void)
 937 {
 938         return platform_driver_register(&sharpsl_pm_driver);
 939 }
 940
 941 static void sharpsl_pm_exit(void)
 942 {
 943         platform_driver_unregister(&sharpsl_pm_driver);
 944 }
 945
 946 late_initcall(sharpsl_pm_init);
 947 module_exit(sharpsl_pm_exit);