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/gpio.h>
  18 #include <linux/gpio-pxa.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/apm-emulation.h>
  22 #include <linux/io.h>
  23
  24 #include <asm/irq.h>
  25 #include <asm/mach-types.h>
  26 #include <mach/hardware.h>
  27
  28 #include <mach/corgi.h>
  29 #include <mach/pxa2xx-regs.h>
  30 #include "sharpsl_pm.h"
  31
  32 #include "generic.h"
  33
  34 #define SHARPSL_CHARGE_ON_VOLT         0x99  /* 2.9V */
  35 #define SHARPSL_CHARGE_ON_TEMP         0xe0  /* 2.9V */
  36 #define SHARPSL_CHARGE_ON_ACIN_HIGH    0x9b  /* 6V */
  37 #define SHARPSL_CHARGE_ON_ACIN_LOW     0x34  /* 2V */
  38 #define SHARPSL_FATAL_ACIN_VOLT        182   /* 3.45V */
  39 #define SHARPSL_FATAL_NOACIN_VOLT      170   /* 3.40V */
  40
  41 static struct gpio charger_gpios[] = {
  42         { CORGI_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
  43         { CORGI_GPIO_CHRG_ON,     GPIOF_OUT_INIT_LOW, "Charger On" },
  44         { CORGI_GPIO_CHRG_UKN,    GPIOF_OUT_INIT_LOW, "Charger Unknown" },
  45         { CORGI_GPIO_AC_IN,       GPIOF_IN, "Charger Detection" },
  46         { CORGI_GPIO_KEY_INT,     GPIOF_IN, "Key Interrupt" },
  47         { CORGI_GPIO_WAKEUP,      GPIOF_IN, "System wakeup notification" },
  48 };
  49
  50 static void corgi_charger_init(void)
  51 {
  52         gpio_request_array(ARRAY_AND_SIZE(charger_gpios));
  53 }
  54
  55 static void corgi_measure_temp(int on)
  56 {
  57         gpio_set_value(CORGI_GPIO_ADC_TEMP_ON, on);
  58 }
  59
  60 static void corgi_charge(int on)
  61 {
  62         if (on) {
  63                 if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
  64                         gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
  65                         gpio_set_value(CORGI_GPIO_CHRG_UKN, 1);
  66                 } else {
  67                         gpio_set_value(CORGI_GPIO_CHRG_ON, 1);
  68                         gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
  69                 }
  70         } else {
  71                 gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
  72                 gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
  73         }
  74 }
  75
  76 static void corgi_discharge(int on)
  77 {
  78         gpio_set_value(CORGI_GPIO_DISCHARGE_ON, on);
  79 }
  80
  81 static void corgi_presuspend(void)
  82 {
  83 }
  84
  85 static void corgi_postsuspend(void)
  86 {
  87 }
  88
  89 /*
  90  * Check what brought us out of the suspend.
  91  * Return: 0 to sleep, otherwise wake
  92  */
  93 static int corgi_should_wakeup(unsigned int resume_on_alarm)
  94 {
  95         int is_resume = 0;
  96
  97         dev_dbg(sharpsl_pm.dev, "PEDR = %x, GPIO_AC_IN = %d, "
  98                 "GPIO_CHRG_FULL = %d, GPIO_KEY_INT = %d, GPIO_WAKEUP = %d\n",
  99                 PEDR, gpio_get_value(CORGI_GPIO_AC_IN),
 100                 gpio_get_value(CORGI_GPIO_CHRG_FULL),
 101                 gpio_get_value(CORGI_GPIO_KEY_INT),
 102                 gpio_get_value(CORGI_GPIO_WAKEUP));
 103
 104         if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
 105                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 106                         /* charge on */
 107                         dev_dbg(sharpsl_pm.dev, "ac insert\n");
 108                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 109                 } else {
 110                         /* charge off */
 111                         dev_dbg(sharpsl_pm.dev, "ac remove\n");
 112                         sharpsl_pm_led(SHARPSL_LED_OFF);
 113                         sharpsl_pm.machinfo->charge(0);
 114                         sharpsl_pm.charge_mode = CHRG_OFF;
 115                 }
 116         }
 117
 118         if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
 119                 dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
 120
 121         if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
 122                 is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
 123
 124         if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
 125                 is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
 126
 127         if (resume_on_alarm && (PEDR & PWER_RTC))
 128                 is_resume |= PWER_RTC;
 129
 130         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
 131         return is_resume;
 132 }
 133
 134 static bool corgi_charger_wakeup(void)
 135 {
 136         return !gpio_get_value(CORGI_GPIO_AC_IN) ||
 137                 !gpio_get_value(CORGI_GPIO_KEY_INT) ||
 138                 !gpio_get_value(CORGI_GPIO_WAKEUP);
 139 }
 140
 141 unsigned long corgipm_read_devdata(int type)
 142 {
 143         switch(type) {
 144         case SHARPSL_STATUS_ACIN:
 145                 return !gpio_get_value(CORGI_GPIO_AC_IN);
 146         case SHARPSL_STATUS_LOCK:
 147                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
 148         case SHARPSL_STATUS_CHRGFULL:
 149                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
 150         case SHARPSL_STATUS_FATAL:
 151                 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
 152         case SHARPSL_ACIN_VOLT:
 153                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 154         case SHARPSL_BATT_TEMP:
 155                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 156         case SHARPSL_BATT_VOLT:
 157         default:
 158                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 159         }
 160 }
 161
 162 static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
 163         .init            = corgi_charger_init,
 164         .exit            = NULL,
 165         .gpio_batlock    = CORGI_GPIO_BAT_COVER,
 166         .gpio_acin       = CORGI_GPIO_AC_IN,
 167         .gpio_batfull    = CORGI_GPIO_CHRG_FULL,
 168         .discharge       = corgi_discharge,
 169         .charge          = corgi_charge,
 170         .measure_temp    = corgi_measure_temp,
 171         .presuspend      = corgi_presuspend,
 172         .postsuspend     = corgi_postsuspend,
 173         .read_devdata    = corgipm_read_devdata,
 174         .charger_wakeup  = corgi_charger_wakeup,
 175         .should_wakeup   = corgi_should_wakeup,
 176 #if defined(CONFIG_LCD_CORGI)
 177         .backlight_limit = corgi_lcd_limit_intensity,
 178 #endif
 179         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 180         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 181         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 182         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 183         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 184         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 185         .bat_levels       = 40,
 186         .bat_levels_noac  = sharpsl_battery_levels_noac,
 187         .bat_levels_acin  = sharpsl_battery_levels_acin,
 188         .status_high_acin = 188,
 189         .status_low_acin  = 178,
 190         .status_high_noac = 185,
 191         .status_low_noac  = 175,
 192 };
 193
 194 static struct platform_device *corgipm_device;
 195
 196 static int corgipm_init(void)
 197 {
 198         int ret;
 199
 200         if (!machine_is_corgi() && !machine_is_shepherd()
 201                         && !machine_is_husky())
 202                 return -ENODEV;
 203
 204         corgipm_device = platform_device_alloc("sharpsl-pm", -1);
 205         if (!corgipm_device)
 206                 return -ENOMEM;
 207
 208         if (!machine_is_corgi())
 209             corgi_pm_machinfo.batfull_irq = 1;
 210
 211         corgipm_device->dev.platform_data = &corgi_pm_machinfo;
 212         ret = platform_device_add(corgipm_device);
 213
 214         if (ret)
 215                 platform_device_put(corgipm_device);
 216
 217         return ret;
 218 }
 219
 220 static void corgipm_exit(void)
 221 {
 222         platform_device_unregister(corgipm_device);
 223 }
 224
 225 module_init(corgipm_init);
 226 module_exit(corgipm_exit);