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