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