arch/arm/mach-pxa/sharpsl_pm.c

   1 /*
   2  * Battery and Power Management code for the Sharp SL-C7xx and SL-Cxx00
   3  * series of PDAs
   4  *
   5  * Copyright (c) 2004-2005 Richard Purdie
   6  *
   7  * Based on code written by Sharp for 2.4 kernels
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  */
  14
  15 #undef DEBUG
  16
  17 #include <linux/module.h>
  18 #include <linux/timer.h>
  19 #include <linux/init.h>
  20 #include <linux/kernel.h>
  21 #include <linux/apm_bios.h>
  22 #include <linux/delay.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/device.h>
  25
  26 #include <asm/hardware.h>
  27 #include <asm/hardware/scoop.h>
  28 #include <asm/mach-types.h>
  29 #include <asm/irq.h>
  30 #include <asm/apm.h>
  31
  32 #include <asm/arch/pm.h>
  33 #include <asm/arch/pxa-regs.h>
  34 #include <asm/arch/sharpsl.h>
  35 #include "sharpsl.h"
  36
  37 /*
  38  * Constants
  39  */
  40 #define SHARPSL_CHARGE_ON_TIME_INTERVAL        (msecs_to_jiffies(1*60*1000))  /* 1 min */
  41 #define SHARPSL_CHARGE_FINISH_TIME             (msecs_to_jiffies(10*60*1000)) /* 10 min */
  42 #define SHARPSL_BATCHK_TIME                    (msecs_to_jiffies(15*1000))    /* 15 sec */
  43 #define SHARPSL_BATCHK_TIME_SUSPEND            (60*10)                        /* 10 min */
  44 #define SHARPSL_WAIT_CO_TIME                   15  /* 15 sec */
  45 #define SHARPSL_WAIT_DISCHARGE_ON              100 /* 100 msec */
  46 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP   10  /* 10 msec */
  47 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT   10  /* 10 msec */
  48 #define SHARPSL_CHECK_BATTERY_WAIT_TIME_JKVAD  10  /* 10 msec */
  49 #define SHARPSL_CHARGE_WAIT_TIME               15  /* 15 msec */
  50 #define SHARPSL_CHARGE_CO_CHECK_TIME           5   /* 5 msec */
  51 #define SHARPSL_CHARGE_RETRY_CNT               1   /* eqv. 10 min */
  52
  53 #define SHARPSL_CHARGE_ON_VOLT         0x99  /* 2.9V */
  54 #define SHARPSL_CHARGE_ON_TEMP         0xe0  /* 2.9V */
  55 #define SHARPSL_CHARGE_ON_JKVAD_HIGH   0x9b  /* 6V */
  56 #define SHARPSL_CHARGE_ON_JKVAD_LOW    0x34  /* 2V */
  57 #define SHARPSL_FATAL_ACIN_VOLT        182   /* 3.45V */
  58 #define SHARPSL_FATAL_NOACIN_VOLT      170   /* 3.40V */
  59
  60 struct battery_thresh spitz_battery_levels_acin[] = {
  61         { 213, 100},
  62         { 212,  98},
  63         { 211,  95},
  64         { 210,  93},
  65         { 209,  90},
  66         { 208,  88},
  67         { 207,  85},
  68         { 206,  83},
  69         { 205,  80},
  70         { 204,  78},
  71         { 203,  75},
  72         { 202,  73},
  73         { 201,  70},
  74         { 200,  68},
  75         { 199,  65},
  76         { 198,  63},
  77         { 197,  60},
  78         { 196,  58},
  79         { 195,  55},
  80         { 194,  53},
  81         { 193,  50},
  82         { 192,  48},
  83         { 192,  45},
  84         { 191,  43},
  85         { 191,  40},
  86         { 190,  38},
  87         { 190,  35},
  88         { 189,  33},
  89         { 188,  30},
  90         { 187,  28},
  91         { 186,  25},
  92         { 185,  23},
  93         { 184,  20},
  94         { 183,  18},
  95         { 182,  15},
  96         { 181,  13},
  97         { 180,  10},
  98         { 179,   8},
  99         { 178,   5},
 100         {   0,   0},
 101 };
 102
 103 struct battery_thresh  spitz_battery_levels_noac[] = {
 104         { 213, 100},
 105         { 212,  98},
 106         { 211,  95},
 107         { 210,  93},
 108         { 209,  90},
 109         { 208,  88},
 110         { 207,  85},
 111         { 206,  83},
 112         { 205,  80},
 113         { 204,  78},
 114         { 203,  75},
 115         { 202,  73},
 116         { 201,  70},
 117         { 200,  68},
 118         { 199,  65},
 119         { 198,  63},
 120         { 197,  60},
 121         { 196,  58},
 122         { 195,  55},
 123         { 194,  53},
 124         { 193,  50},
 125         { 192,  48},
 126         { 191,  45},
 127         { 190,  43},
 128         { 189,  40},
 129         { 188,  38},
 130         { 187,  35},
 131         { 186,  33},
 132         { 185,  30},
 133         { 184,  28},
 134         { 183,  25},
 135         { 182,  23},
 136         { 181,  20},
 137         { 180,  18},
 138         { 179,  15},
 139         { 178,  13},
 140         { 177,  10},
 141         { 176,   8},
 142         { 175,   5},
 143         {   0,   0},
 144 };
 145
 146 /* MAX1111 Commands */
 147 #define MAXCTRL_PD0      1u << 0
 148 #define MAXCTRL_PD1      1u << 1
 149 #define MAXCTRL_SGL      1u << 2
 150 #define MAXCTRL_UNI      1u << 3
 151 #define MAXCTRL_SEL_SH   4
 152 #define MAXCTRL_STR      1u << 7
 153
 154 /* MAX1111 Channel Definitions */
 155 #define BATT_AD    4u
 156 #define BATT_THM   2u
 157 #define JK_VAD     6u
 158
 159
 160 /*
 161  * Prototypes
 162  */
 163 static int sharpsl_read_MainBattery(void);
 164 static int sharpsl_off_charge_battery(void);
 165 static int sharpsl_check_battery(int mode);
 166 static int sharpsl_ac_check(void);
 167 static int sharpsl_fatal_check(void);
 168 static int sharpsl_average_value(int ad);
 169 static void sharpsl_average_clear(void);
 170 static void sharpsl_charge_toggle(void *private_);
 171 static void sharpsl_battery_thread(void *private_);
 172
 173
 174 /*
 175  * Variables
 176  */
 177 struct sharpsl_pm_status sharpsl_pm;
 178 DECLARE_WORK(toggle_charger, sharpsl_charge_toggle, NULL);
 179 DECLARE_WORK(sharpsl_bat, sharpsl_battery_thread, NULL);
 180
 181
 182 static int get_percentage(int voltage)
 183 {
 184         int i = sharpsl_pm.machinfo->bat_levels - 1;
 185         struct battery_thresh *thresh;
 186
 187         if (sharpsl_pm.charge_mode == CHRG_ON)
 188                 thresh=sharpsl_pm.machinfo->bat_levels_acin;
 189         else
 190                 thresh=sharpsl_pm.machinfo->bat_levels_noac;
 191
 192         while (i > 0 && (voltage > thresh[i].voltage))
 193                 i--;
 194
 195         return thresh[i].percentage;
 196 }
 197
 198 static int get_apm_status(int voltage)
 199 {
 200         int low_thresh, high_thresh;
 201
 202         if (sharpsl_pm.charge_mode == CHRG_ON) {
 203                 high_thresh = sharpsl_pm.machinfo->status_high_acin;
 204                 low_thresh = sharpsl_pm.machinfo->status_low_acin;
 205         } else {
 206                 high_thresh = sharpsl_pm.machinfo->status_high_noac;
 207                 low_thresh = sharpsl_pm.machinfo->status_low_noac;
 208         }
 209
 210         if (voltage >= high_thresh)
 211                 return APM_BATTERY_STATUS_HIGH;
 212         if (voltage >= low_thresh)
 213                 return APM_BATTERY_STATUS_LOW;
 214         return APM_BATTERY_STATUS_CRITICAL;
 215 }
 216
 217 void sharpsl_battery_kick(void)
 218 {
 219         schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
 220 }
 221 EXPORT_SYMBOL(sharpsl_battery_kick);
 222
 223
 224 static void sharpsl_battery_thread(void *private_)
 225 {
 226         int voltage, percent, apm_status, i = 0;
 227
 228         if (!sharpsl_pm.machinfo)
 229                 return;
 230
 231         sharpsl_pm.battstat.ac_status = (!(STATUS_AC_IN) ? APM_AC_OFFLINE : APM_AC_ONLINE);
 232
 233         /* Corgi cannot confirm when battery fully charged so periodically kick! */
 234         if (machine_is_corgi() && (sharpsl_pm.charge_mode == CHRG_ON)
 235                         && time_after(jiffies, sharpsl_pm.charge_start_time +  SHARPSL_CHARGE_ON_TIME_INTERVAL))
 236                 schedule_work(&toggle_charger);
 237
 238         while(1) {
 239                 voltage = sharpsl_read_MainBattery();
 240                 if (voltage > 0) break;
 241                 if (i++ > 5) {
 242                         voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
 243                         dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
 244                         break;
 245                 }
 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) || (apm_status == APM_BATTERY_STATUS_HIGH) ||  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: %d\n", voltage,
 261                         sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
 262
 263         /* If battery is low. limit backlight intensity to save power. */
 264         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 265                         && ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW) ||
 266                         (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
 267                 if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
 268                         corgibl_limit_intensity(1);
 269                         sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
 270                 }
 271         } else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
 272                 corgibl_limit_intensity(0);
 273                 sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
 274         }
 275
 276         /* Suspend if critical battery level */
 277         if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
 278                         && (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
 279                         && !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
 280                 sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
 281                 dev_err(sharpsl_pm.dev, "Fatal Off\n");
 282                 apm_queue_event(APM_CRITICAL_SUSPEND);
 283         }
 284
 285         schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
 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         CHARGE_OFF();
 303         CHARGE_LED_OFF();
 304         sharpsl_pm.charge_mode = CHRG_OFF;
 305
 306         schedule_work(&sharpsl_bat);
 307 }
 308
 309 static void sharpsl_charge_error(void)
 310 {
 311         CHARGE_LED_ERR();
 312         CHARGE_OFF();
 313         sharpsl_pm.charge_mode = CHRG_ERROR;
 314 }
 315
 316 static void sharpsl_charge_toggle(void *private_)
 317 {
 318         dev_dbg(sharpsl_pm.dev, "Toogling Charger at time: %lx\n", jiffies);
 319
 320         if (STATUS_AC_IN == 0) {
 321                 sharpsl_charge_off();
 322                 return;
 323         } else if ((sharpsl_check_battery(1) < 0) || (sharpsl_ac_check() < 0)) {
 324                 sharpsl_charge_error();
 325                 return;
 326         }
 327
 328         CHARGE_LED_ON();
 329         CHARGE_OFF();
 330         mdelay(SHARPSL_CHARGE_WAIT_TIME);
 331         CHARGE_ON();
 332
 333         sharpsl_pm.charge_start_time = jiffies;
 334 }
 335
 336 static void sharpsl_ac_timer(unsigned long data)
 337 {
 338         int acin = STATUS_AC_IN;
 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_work(&sharpsl_bat);
 349 }
 350
 351
 352 static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id, struct pt_regs *fp)
 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(unsigned long data)
 362 {
 363         dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
 364
 365         sharpsl_pm.full_count++;
 366
 367         if (STATUS_AC_IN == 0) {
 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_work(&toggle_charger);
 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_work(&toggle_charger);
 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 staus change so
 386    delay until after that has been processed */
 387 static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id, struct pt_regs *fp)
 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, struct pt_regs *fp)
 399 {
 400         int is_fatal = 0;
 401
 402         if (STATUS_BATT_LOCKED == 0) {
 403                 dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
 404                 is_fatal = 1;
 405         }
 406
 407         if (sharpsl_pm.machinfo->gpio_fatal && (STATUS_FATAL == 0)) {
 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 /*
 456  * Read MAX1111 ADC
 457  */
 458 static int read_max1111(int channel)
 459 {
 460         return corgi_ssp_max1111_get((channel << MAXCTRL_SEL_SH) | MAXCTRL_PD0 | MAXCTRL_PD1
 461                         | MAXCTRL_SGL | MAXCTRL_UNI | MAXCTRL_STR);
 462 }
 463
 464 static int sharpsl_read_MainBattery(void)
 465 {
 466         return read_max1111(BATT_AD);
 467 }
 468
 469 static int sharpsl_read_Temp(void)
 470 {
 471         int temp;
 472
 473         sharpsl_pm.machinfo->measure_temp(1);
 474
 475         mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 476         temp = read_max1111(BATT_THM);
 477
 478         sharpsl_pm.machinfo->measure_temp(0);
 479
 480         return temp;
 481 }
 482
 483 static int sharpsl_read_jkvad(void)
 484 {
 485         return read_max1111(JK_VAD);
 486 }
 487
 488 /*
 489  * Take an array of 5 integers, remove the maximum and minimum values
 490  * and return the average.
 491  */
 492 static int get_select_val(int *val)
 493 {
 494         int i, j, k, temp, sum = 0;
 495
 496         /* Find MAX val */
 497         temp = val[0];
 498         j=0;
 499         for (i=1; i<5; i++) {
 500                 if (temp < val[i]) {
 501                         temp = val[i];
 502                         j = i;
 503                 }
 504         }
 505
 506         /* Find MIN val */
 507         temp = val[4];
 508         k=4;
 509         for (i=3; i>=0; i--) {
 510                 if (temp > val[i]) {
 511                         temp = val[i];
 512                         k = i;
 513                 }
 514         }
 515
 516         for (i=0; i<5; i++)
 517                 if (i != j && i != k )
 518                         sum += val[i];
 519
 520         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]);
 521
 522         return (sum/3);
 523 }
 524
 525 /*  mode 0 - Check temperature and voltage
 526  *       1 - Check temperature only */
 527 static int sharpsl_check_battery(int mode)
 528 {
 529         int val, i, buff[5];
 530
 531         /* Check battery temperature */
 532         for (i=0; i<5; i++) {
 533                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
 534                 buff[i] = sharpsl_read_Temp();
 535         }
 536
 537         val = get_select_val(buff);
 538
 539         dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
 540         if (val > SHARPSL_CHARGE_ON_TEMP)
 541                 return -1;
 542         if (mode == 1)
 543                 return 0;
 544
 545         /* disable charge, enable discharge */
 546         CHARGE_OFF();
 547         DISCHARGE_ON();
 548         mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 549
 550         if (sharpsl_pm.machinfo->discharge1)
 551                 sharpsl_pm.machinfo->discharge1(1);
 552
 553         /* Check battery voltage */
 554         for (i=0; i<5; i++) {
 555                 buff[i] = sharpsl_read_MainBattery();
 556                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 557         }
 558
 559         if (sharpsl_pm.machinfo->discharge1)
 560                 sharpsl_pm.machinfo->discharge1(0);
 561
 562         DISCHARGE_OFF();
 563
 564         val = get_select_val(buff);
 565         dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
 566
 567         if (val < SHARPSL_CHARGE_ON_VOLT)
 568                 return -1;
 569
 570         return 0;
 571 }
 572
 573 static int sharpsl_ac_check(void)
 574 {
 575         int temp, i, buff[5];
 576
 577         for (i=0; i<5; i++) {
 578                 buff[i] = sharpsl_read_jkvad();
 579                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_JKVAD);
 580         }
 581
 582         temp = get_select_val(buff);
 583         dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n",temp);
 584
 585         if ((temp > SHARPSL_CHARGE_ON_JKVAD_HIGH) || (temp < SHARPSL_CHARGE_ON_JKVAD_LOW)) {
 586                 dev_err(sharpsl_pm.dev, "Error: AC check failed.\n");
 587                 return -1;
 588         }
 589
 590         return 0;
 591 }
 592
 593 #ifdef CONFIG_PM
 594 static int sharpsl_pm_suspend(struct device *dev, pm_message_t state)
 595 {
 596         sharpsl_pm.flags |= SHARPSL_SUSPENDED;
 597         flush_scheduled_work();
 598
 599         if (sharpsl_pm.charge_mode == CHRG_ON)
 600                 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 601         else
 602                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 603
 604         return 0;
 605 }
 606
 607 static int sharpsl_pm_resume(struct device *dev)
 608 {
 609         /* Clear the reset source indicators as they break the bootloader upon reboot */
 610         RCSR = 0x0f;
 611         sharpsl_average_clear();
 612         sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
 613         sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
 614
 615         return 0;
 616 }
 617
 618 static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 619 {
 620         dev_dbg(sharpsl_pm.dev, "Time is: %08x\n",RCNR);
 621
 622         dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n",sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
 623         /* not charging and AC-IN! */
 624
 625         if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (STATUS_AC_IN != 0)) {
 626                 dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
 627                 sharpsl_pm.charge_mode = CHRG_OFF;
 628                 sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
 629                 sharpsl_off_charge_battery();
 630         }
 631
 632         sharpsl_pm.machinfo->presuspend();
 633
 634         PEDR = 0xffffffff; /* clear it */
 635
 636         sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
 637         if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
 638                 RTSR &= RTSR_ALE;
 639                 RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
 640                 dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n",RTAR);
 641                 sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
 642         } else if (alarm_enable) {
 643                 RTSR &= RTSR_ALE;
 644                 RTAR = alarm_time;
 645                 dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n",RTAR);
 646         } else {
 647                 dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
 648         }
 649
 650         pxa_pm_enter(state);
 651
 652         sharpsl_pm.machinfo->postsuspend();
 653
 654         dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n",PEDR);
 655 }
 656
 657 static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
 658 {
 659         if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable) )
 660         {
 661                 if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
 662                         dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
 663                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 664                         return 1;
 665                 }
 666                 if(sharpsl_off_charge_battery()) {
 667                         dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
 668                         corgi_goto_sleep(alarm_time, alarm_enable, state);
 669                         return 1;
 670                 }
 671                 dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
 672         }
 673
 674         if ((STATUS_BATT_LOCKED == 0) || (sharpsl_fatal_check() < 0) )
 675         {
 676                 dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
 677                 corgi_goto_sleep(alarm_time, alarm_enable, state);
 678                 return 1;
 679         }
 680
 681         return 0;
 682 }
 683
 684 static int corgi_pxa_pm_enter(suspend_state_t state)
 685 {
 686         unsigned long alarm_time = RTAR;
 687         unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
 688
 689         dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
 690
 691         corgi_goto_sleep(alarm_time, alarm_status, state);
 692
 693         while (corgi_enter_suspend(alarm_time,alarm_status,state))
 694                 {}
 695
 696         dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
 697
 698         return 0;
 699 }
 700 #endif
 701
 702
 703 /*
 704  * Check for fatal battery errors
 705  * Fatal returns -1
 706  */
 707 static int sharpsl_fatal_check(void)
 708 {
 709         int buff[5], temp, i, acin;
 710
 711         dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
 712
 713         /* Check AC-Adapter */
 714         acin = STATUS_AC_IN;
 715
 716         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 717                 CHARGE_OFF();
 718                 udelay(100);
 719                 DISCHARGE_ON(); /* enable discharge */
 720                 mdelay(SHARPSL_WAIT_DISCHARGE_ON);
 721         }
 722
 723         if (sharpsl_pm.machinfo->discharge1)
 724                 sharpsl_pm.machinfo->discharge1(1);
 725
 726         /* Check battery : check inserting battery ? */
 727         for (i=0; i<5; i++) {
 728                 buff[i] = sharpsl_read_MainBattery();
 729                 mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
 730         }
 731
 732         if (sharpsl_pm.machinfo->discharge1)
 733                 sharpsl_pm.machinfo->discharge1(0);
 734
 735         if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
 736                 udelay(100);
 737                 CHARGE_ON();
 738                 DISCHARGE_OFF();
 739         }
 740
 741         temp = get_select_val(buff);
 742         dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check: acin: %d, discharge voltage: %d, no discharge: %d\n", acin, temp, sharpsl_read_MainBattery());
 743
 744         if ((acin && (temp < SHARPSL_FATAL_ACIN_VOLT)) ||
 745                         (!acin && (temp < SHARPSL_FATAL_NOACIN_VOLT)))
 746                 return -1;
 747         return 0;
 748 }
 749
 750 static int sharpsl_off_charge_error(void)
 751 {
 752         dev_err(sharpsl_pm.dev, "Offline Charger: Error occured.\n");
 753         CHARGE_OFF();
 754         CHARGE_LED_ERR();
 755         sharpsl_pm.charge_mode = CHRG_ERROR;
 756         return 1;
 757 }
 758
 759 /*
 760  * Charging Control while suspended
 761  * Return 1 - go straight to sleep
 762  * Return 0 - sleep or wakeup depending on other factors
 763  */
 764 static int sharpsl_off_charge_battery(void)
 765 {
 766         int time;
 767
 768         dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
 769
 770         if (sharpsl_pm.charge_mode == CHRG_OFF) {
 771                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
 772
 773                 /* AC Check */
 774                 if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery(1) < 0))
 775                         return sharpsl_off_charge_error();
 776
 777                 /* Start Charging */
 778                 CHARGE_LED_ON();
 779                 CHARGE_OFF();
 780                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 781                 CHARGE_ON();
 782
 783                 sharpsl_pm.charge_mode = CHRG_ON;
 784                 sharpsl_pm.full_count = 0;
 785
 786                 return 1;
 787         } else if (sharpsl_pm.charge_mode != CHRG_ON) {
 788                 return 1;
 789         }
 790
 791         if (sharpsl_pm.full_count == 0) {
 792                 int time;
 793
 794                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
 795
 796                 if (sharpsl_check_battery(0) < 0)
 797                         return sharpsl_off_charge_error();
 798
 799                 CHARGE_OFF();
 800                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 801                 CHARGE_ON();
 802                 sharpsl_pm.charge_mode = CHRG_ON;
 803
 804                 mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 805
 806                 time = RCNR;
 807                 while(1) {
 808                         /* Check if any wakeup event had occured */
 809                         if (sharpsl_pm.machinfo->charger_wakeup() != 0)
 810                                 return 0;
 811                         /* Check for timeout */
 812                         if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
 813                                 return 1;
 814                         if (STATUS_CHRG_FULL) {
 815                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occured. Retrying to check\n");
 816                                 sharpsl_pm.full_count++;
 817                                 CHARGE_OFF();
 818                                 mdelay(SHARPSL_CHARGE_WAIT_TIME);
 819                                 CHARGE_ON();
 820                                 return 1;
 821                         }
 822                 }
 823         }
 824
 825         dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
 826
 827         mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
 828
 829         time = RCNR;
 830         while(1) {
 831                 /* Check if any wakeup event had occured */
 832                 if (sharpsl_pm.machinfo->charger_wakeup() != 0)
 833                         return 0;
 834                 /* Check for timeout */
 835                 if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
 836                         if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
 837                                 dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
 838                                 sharpsl_pm.full_count = 0;
 839                         }
 840                         sharpsl_pm.full_count++;
 841                         return 1;
 842                 }
 843                 if (STATUS_CHRG_FULL) {
 844                         dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
 845                         CHARGE_LED_OFF();
 846                         CHARGE_OFF();
 847                         sharpsl_pm.charge_mode = CHRG_DONE;
 848                         return 1;
 849                 }
 850         }
 851 }
 852
 853
 854 static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
 855 {
 856         return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_percent);
 857 }
 858
 859 static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
 860 {
 861         return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_voltage);
 862 }
 863
 864 static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
 865 static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
 866
 867 extern void (*apm_get_power_status)(struct apm_power_info *);
 868
 869 static void sharpsl_apm_get_power_status(struct apm_power_info *info)
 870 {
 871         info->ac_line_status = sharpsl_pm.battstat.ac_status;
 872
 873         if (sharpsl_pm.charge_mode == CHRG_ON)
 874                 info->battery_status = APM_BATTERY_STATUS_CHARGING;
 875         else
 876                 info->battery_status = sharpsl_pm.battstat.mainbat_status;
 877
 878         info->battery_flag = (1 << info->battery_status);
 879         info->battery_life = sharpsl_pm.battstat.mainbat_percent;
 880 }
 881
 882 static struct pm_ops sharpsl_pm_ops = {
 883         .pm_disk_mode   = PM_DISK_FIRMWARE,
 884         .prepare        = pxa_pm_prepare,
 885         .enter          = corgi_pxa_pm_enter,
 886         .finish         = pxa_pm_finish,
 887 };
 888
 889 static int __init sharpsl_pm_probe(struct device *dev)
 890 {
 891         if (!dev->platform_data)
 892                 return -EINVAL;
 893
 894         sharpsl_pm.dev = dev;
 895         sharpsl_pm.machinfo = dev->platform_data;
 896         sharpsl_pm.charge_mode = CHRG_OFF;
 897         sharpsl_pm.flags = 0;
 898
 899         sharpsl_pm.machinfo->init();
 900
 901         init_timer(&sharpsl_pm.ac_timer);
 902         sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
 903
 904         init_timer(&sharpsl_pm.chrg_full_timer);
 905         sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
 906
 907         pxa_gpio_mode(sharpsl_pm.machinfo->gpio_acin | GPIO_IN);
 908         pxa_gpio_mode(sharpsl_pm.machinfo->gpio_batfull | GPIO_IN);
 909         pxa_gpio_mode(sharpsl_pm.machinfo->gpio_batlock | GPIO_IN);
 910
 911         /* Register interrupt handlers */
 912         if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr, SA_INTERRUPT, "AC Input Detect", sharpsl_ac_isr)) {
 913                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin));
 914         }
 915         else set_irq_type(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin),IRQT_BOTHEDGE);
 916
 917         if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr, SA_INTERRUPT, "Battery Cover", sharpsl_fatal_isr)) {
 918                 dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock));
 919         }
 920         else set_irq_type(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock),IRQT_FALLING);
 921
 922         if (sharpsl_pm.machinfo->gpio_fatal) {
 923                 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr, SA_INTERRUPT, "Fatal Battery", sharpsl_fatal_isr)) {
 924                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal));
 925                 }
 926                 else set_irq_type(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal),IRQT_FALLING);
 927         }
 928
 929         if (!machine_is_corgi())
 930         {
 931                 /* Register interrupt handler. */
 932                 if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr, SA_INTERRUPT, "CO", sharpsl_chrg_full_isr)) {
 933                         dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull));
 934                 }
 935                 else set_irq_type(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull),IRQT_RISING);
 936         }
 937
 938         device_create_file(dev, &dev_attr_battery_percentage);
 939         device_create_file(dev, &dev_attr_battery_voltage);
 940
 941         apm_get_power_status = sharpsl_apm_get_power_status;
 942
 943         pm_set_ops(&sharpsl_pm_ops);
 944
 945         mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
 946
 947         return 0;
 948 }
 949
 950 static int sharpsl_pm_remove(struct device *dev)
 951 {
 952         pm_set_ops(NULL);
 953
 954         device_remove_file(dev, &dev_attr_battery_percentage);
 955         device_remove_file(dev, &dev_attr_battery_voltage);
 956
 957         free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
 958         free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
 959
 960         if (sharpsl_pm.machinfo->gpio_fatal)
 961                 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
 962
 963         if (!machine_is_corgi())
 964                 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
 965
 966         del_timer_sync(&sharpsl_pm.chrg_full_timer);
 967         del_timer_sync(&sharpsl_pm.ac_timer);
 968
 969         return 0;
 970 }
 971
 972 static struct device_driver sharpsl_pm_driver = {
 973         .name           = "sharpsl-pm",
 974         .bus            = &platform_bus_type,
 975         .probe          = sharpsl_pm_probe,
 976         .remove         = sharpsl_pm_remove,
 977         .suspend        = sharpsl_pm_suspend,
 978         .resume         = sharpsl_pm_resume,
 979 };
 980
 981 static int __devinit sharpsl_pm_init(void)
 982 {
 983         return driver_register(&sharpsl_pm_driver);
 984 }
 985
 986 static void sharpsl_pm_exit(void)
 987 {
 988         driver_unregister(&sharpsl_pm_driver);
 989 }
 990
 991 late_initcall(sharpsl_pm_init);
 992 module_exit(sharpsl_pm_exit);