arch/arm/mach-pxa/corgi_pm.c

   1 /*
   2  * Battery and Power Management code for the Sharp SL-C7xx
   3  *
   4  * Copyright (c) 2005 Richard Purdie
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/stat.h>
  14 #include <linux/init.h>
  15 #include <linux/kernel.h>
  16 #include <linux/delay.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/apm-emulation.h>
  20
  21 #include <asm/irq.h>
  22 #include <asm/mach-types.h>
  23 #include <mach/hardware.h>
  24
  25 #include <mach/sharpsl.h>
  26 #include <mach/corgi.h>
  27 #include <mach/pxa2xx-regs.h>
  28 #include <mach/pxa2xx-gpio.h>
  29 #include "sharpsl.h"
  30
  31 #define SHARPSL_CHARGE_ON_VOLT         0x99  /* 2.9V */
  32 #define SHARPSL_CHARGE_ON_TEMP         0xe0  /* 2.9V */
  33 #define SHARPSL_CHARGE_ON_ACIN_HIGH    0x9b  /* 6V */
  34 #define SHARPSL_CHARGE_ON_ACIN_LOW     0x34  /* 2V */
  35 #define SHARPSL_FATAL_ACIN_VOLT        182   /* 3.45V */
  36 #define SHARPSL_FATAL_NOACIN_VOLT      170   /* 3.40V */
  37
  38 static void corgi_charger_init(void)
  39 {
  40         pxa_gpio_mode(CORGI_GPIO_ADC_TEMP_ON | GPIO_OUT);
  41         pxa_gpio_mode(CORGI_GPIO_CHRG_ON | GPIO_OUT);
  42         pxa_gpio_mode(CORGI_GPIO_CHRG_UKN | GPIO_OUT);
  43         pxa_gpio_mode(CORGI_GPIO_KEY_INT | GPIO_IN);
  44         sharpsl_pm_pxa_init();
  45 }
  46
  47 static void corgi_measure_temp(int on)
  48 {
  49         if (on)
  50                 GPSR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_ON);
  51         else
  52                 GPCR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_ON);
  53 }
  54
  55 static void corgi_charge(int on)
  56 {
  57         if (on) {
  58                 if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
  59                         GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
  60                         GPSR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
  61                 } else {
  62                         GPSR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
  63                         GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
  64                 }
  65         } else {
  66                 GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
  67                 GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
  68         }
  69 }
  70
  71 static void corgi_discharge(int on)
  72 {
  73         if (on)
  74                 GPSR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
  75         else
  76                 GPCR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
  77 }
  78
  79 static void corgi_presuspend(void)
  80 {
  81         int i;
  82         unsigned long wakeup_mask;
  83
  84         /* charging , so CHARGE_ON bit is HIGH during OFF. */
  85         if (READ_GPIO_BIT(CORGI_GPIO_CHRG_ON))
  86                 PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_ON);
  87         else
  88                 PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_ON);
  89
  90         if (READ_GPIO_BIT(CORGI_GPIO_LED_ORANGE))
  91                 PGSR0 |= GPIO_bit(CORGI_GPIO_LED_ORANGE);
  92         else
  93                 PGSR0 &= ~GPIO_bit(CORGI_GPIO_LED_ORANGE);
  94
  95         if (READ_GPIO_BIT(CORGI_GPIO_CHRG_UKN))
  96                 PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_UKN);
  97         else
  98                 PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_UKN);
  99
 100         /* Resume on keyboard power key */
 101         PGSR2 = (PGSR2 & ~CORGI_GPIO_ALL_STROBE_BIT) | CORGI_GPIO_STROBE_BIT(0);
 102
 103         wakeup_mask = GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) | GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_CHRG_FULL);
 104
 105         if (!machine_is_corgi())
 106                 wakeup_mask |= GPIO_bit(CORGI_GPIO_MAIN_BAT_LOW);
 107
 108         PWER = wakeup_mask | PWER_RTC;
 109         PRER = wakeup_mask;
 110         PFER = wakeup_mask;
 111
 112         for (i = 0; i <=15; i++) {
 113                 if (PRER & PFER & GPIO_bit(i)) {
 114                         if (GPLR0 & GPIO_bit(i) )
 115                                 PRER &= ~GPIO_bit(i);
 116                         else
 117                                 PFER &= ~GPIO_bit(i);
 118                 }
 119         }
 120 }
 121
 122 static void corgi_postsuspend(void)
 123 {
 124 }
 125
 126 /*
 127  * Check what brought us out of the suspend.
 128  * Return: 0 to sleep, otherwise wake
 129  */
 130 static int corgi_should_wakeup(unsigned int resume_on_alarm)
 131 {
 132         int is_resume = 0;
 133
 134         dev_dbg(sharpsl_pm.dev, "GPLR0 = %x,%x\n", GPLR0, PEDR);
 135
 136         if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
 137                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 138                         /* charge on */
 139                         dev_dbg(sharpsl_pm.dev, "ac insert\n");
 140                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 141                 } else {
 142                         /* charge off */
 143                         dev_dbg(sharpsl_pm.dev, "ac remove\n");
 144                         sharpsl_pm_led(SHARPSL_LED_OFF);
 145                         sharpsl_pm.machinfo->charge(0);
 146                         sharpsl_pm.charge_mode = CHRG_OFF;
 147                 }
 148         }
 149
 150         if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
 151                 dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
 152
 153         if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
 154                 is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
 155
 156         if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
 157                 is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
 158
 159         if (resume_on_alarm && (PEDR & PWER_RTC))
 160                 is_resume |= PWER_RTC;
 161
 162         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
 163         return is_resume;
 164 }
 165
 166 static unsigned long corgi_charger_wakeup(void)
 167 {
 168         return ~GPLR0 & ( GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) );
 169 }
 170
 171 unsigned long corgipm_read_devdata(int type)
 172 {
 173         switch(type) {
 174         case SHARPSL_STATUS_ACIN:
 175                 return ((GPLR(CORGI_GPIO_AC_IN) & GPIO_bit(CORGI_GPIO_AC_IN)) != 0);
 176         case SHARPSL_STATUS_LOCK:
 177                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
 178         case SHARPSL_STATUS_CHRGFULL:
 179                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
 180         case SHARPSL_STATUS_FATAL:
 181                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
 182         case SHARPSL_ACIN_VOLT:
 183                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 184         case SHARPSL_BATT_TEMP:
 185                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 186         case SHARPSL_BATT_VOLT:
 187         default:
 188                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 189         }
 190 }
 191
 192 static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
 193         .init            = corgi_charger_init,
 194         .exit            = sharpsl_pm_pxa_remove,
 195         .gpio_batlock    = CORGI_GPIO_BAT_COVER,
 196         .gpio_acin       = CORGI_GPIO_AC_IN,
 197         .gpio_batfull    = CORGI_GPIO_CHRG_FULL,
 198         .discharge       = corgi_discharge,
 199         .charge          = corgi_charge,
 200         .measure_temp    = corgi_measure_temp,
 201         .presuspend      = corgi_presuspend,
 202         .postsuspend     = corgi_postsuspend,
 203         .read_devdata    = corgipm_read_devdata,
 204         .charger_wakeup  = corgi_charger_wakeup,
 205         .should_wakeup   = corgi_should_wakeup,
 206 #if defined(CONFIG_LCD_CORGI)
 207         .backlight_limit = corgi_lcd_limit_intensity,
 208 #elif defined(CONFIG_BACKLIGHT_CORGI)
 209         .backlight_limit = corgibl_limit_intensity,
 210 #endif
 211         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 212         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 213         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 214         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 215         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 216         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 217         .bat_levels       = 40,
 218         .bat_levels_noac  = spitz_battery_levels_noac,
 219         .bat_levels_acin  = spitz_battery_levels_acin,
 220         .status_high_acin = 188,
 221         .status_low_acin  = 178,
 222         .status_high_noac = 185,
 223         .status_low_noac  = 175,
 224 };
 225
 226 static struct platform_device *corgipm_device;
 227
 228 static int __devinit corgipm_init(void)
 229 {
 230         int ret;
 231
 232         if (!machine_is_corgi() && !machine_is_shepherd()
 233                         && !machine_is_husky())
 234                 return -ENODEV;
 235
 236         corgipm_device = platform_device_alloc("sharpsl-pm", -1);
 237         if (!corgipm_device)
 238                 return -ENOMEM;
 239
 240         if (!machine_is_corgi())
 241             corgi_pm_machinfo.batfull_irq = 1;
 242
 243         corgipm_device->dev.platform_data = &corgi_pm_machinfo;
 244         ret = platform_device_add(corgipm_device);
 245
 246         if (ret)
 247                 platform_device_put(corgipm_device);
 248
 249         return ret;
 250 }
 251
 252 static void corgipm_exit(void)
 253 {
 254         platform_device_unregister(corgipm_device);
 255 }
 256
 257 module_init(corgipm_init);
 258 module_exit(corgipm_exit);