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/interrupt.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/apm-emulation.h>
  21
  22 #include <asm/irq.h>
  23 #include <asm/mach-types.h>
  24 #include <mach/hardware.h>
  25
  26 #include <mach/corgi.h>
  27 #include <mach/pxa2xx-regs.h>
  28 #include <mach/sharpsl_pm.h>
  29
  30 #include "generic.h"
  31
  32 #define SHARPSL_CHARGE_ON_VOLT         0x99  /* 2.9V */
  33 #define SHARPSL_CHARGE_ON_TEMP         0xe0  /* 2.9V */
  34 #define SHARPSL_CHARGE_ON_ACIN_HIGH    0x9b  /* 6V */
  35 #define SHARPSL_CHARGE_ON_ACIN_LOW     0x34  /* 2V */
  36 #define SHARPSL_FATAL_ACIN_VOLT        182   /* 3.45V */
  37 #define SHARPSL_FATAL_NOACIN_VOLT      170   /* 3.40V */
  38
  39 static struct gpio charger_gpios[] = {
  40         { CORGI_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
  41         { CORGI_GPIO_CHRG_ON,     GPIOF_OUT_INIT_LOW, "Charger On" },
  42         { CORGI_GPIO_CHRG_UKN,    GPIOF_OUT_INIT_LOW, "Charger Unknown" },
  43         { CORGI_GPIO_KEY_INT,     GPIOF_IN, "Key Interrupt" },
  44 };
  45
  46 static void corgi_charger_init(void)
  47 {
  48         gpio_request_array(ARRAY_AND_SIZE(charger_gpios));
  49 }
  50
  51 static void corgi_measure_temp(int on)
  52 {
  53         gpio_set_value(CORGI_GPIO_ADC_TEMP_ON, on);
  54 }
  55
  56 static void corgi_charge(int on)
  57 {
  58         if (on) {
  59                 if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
  60                         gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
  61                         gpio_set_value(CORGI_GPIO_CHRG_UKN, 1);
  62                 } else {
  63                         gpio_set_value(CORGI_GPIO_CHRG_ON, 1);
  64                         gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
  65                 }
  66         } else {
  67                 gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
  68                 gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
  69         }
  70 }
  71
  72 static void corgi_discharge(int on)
  73 {
  74         gpio_set_value(CORGI_GPIO_DISCHARGE_ON, on);
  75 }
  76
  77 static void corgi_presuspend(void)
  78 {
  79 }
  80
  81 static void corgi_postsuspend(void)
  82 {
  83 }
  84
  85 /*
  86  * Check what brought us out of the suspend.
  87  * Return: 0 to sleep, otherwise wake
  88  */
  89 static int corgi_should_wakeup(unsigned int resume_on_alarm)
  90 {
  91         int is_resume = 0;
  92
  93         dev_dbg(sharpsl_pm.dev, "GPLR0 = %x,%x\n", GPLR0, PEDR);
  94
  95         if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
  96                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
  97                         /* charge on */
  98                         dev_dbg(sharpsl_pm.dev, "ac insert\n");
  99                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 100                 } else {
 101                         /* charge off */
 102                         dev_dbg(sharpsl_pm.dev, "ac remove\n");
 103                         sharpsl_pm_led(SHARPSL_LED_OFF);
 104                         sharpsl_pm.machinfo->charge(0);
 105                         sharpsl_pm.charge_mode = CHRG_OFF;
 106                 }
 107         }
 108
 109         if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
 110                 dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
 111
 112         if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
 113                 is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
 114
 115         if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
 116                 is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
 117
 118         if (resume_on_alarm && (PEDR & PWER_RTC))
 119                 is_resume |= PWER_RTC;
 120
 121         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
 122         return is_resume;
 123 }
 124
 125 static unsigned long corgi_charger_wakeup(void)
 126 {
 127         return ~GPLR0 & ( GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) );
 128 }
 129
 130 unsigned long corgipm_read_devdata(int type)
 131 {
 132         switch(type) {
 133         case SHARPSL_STATUS_ACIN:
 134                 return ((GPLR(CORGI_GPIO_AC_IN) & GPIO_bit(CORGI_GPIO_AC_IN)) != 0);
 135         case SHARPSL_STATUS_LOCK:
 136                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
 137         case SHARPSL_STATUS_CHRGFULL:
 138                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
 139         case SHARPSL_STATUS_FATAL:
 140                 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
 141         case SHARPSL_ACIN_VOLT:
 142                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 143         case SHARPSL_BATT_TEMP:
 144                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 145         case SHARPSL_BATT_VOLT:
 146         default:
 147                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 148         }
 149 }
 150
 151 static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
 152         .init            = corgi_charger_init,
 153         .exit            = NULL,
 154         .gpio_batlock    = CORGI_GPIO_BAT_COVER,
 155         .gpio_acin       = CORGI_GPIO_AC_IN,
 156         .gpio_batfull    = CORGI_GPIO_CHRG_FULL,
 157         .discharge       = corgi_discharge,
 158         .charge          = corgi_charge,
 159         .measure_temp    = corgi_measure_temp,
 160         .presuspend      = corgi_presuspend,
 161         .postsuspend     = corgi_postsuspend,
 162         .read_devdata    = corgipm_read_devdata,
 163         .charger_wakeup  = corgi_charger_wakeup,
 164         .should_wakeup   = corgi_should_wakeup,
 165 #if defined(CONFIG_LCD_CORGI)
 166         .backlight_limit = corgi_lcd_limit_intensity,
 167 #endif
 168         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 169         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 170         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 171         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 172         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 173         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 174         .bat_levels       = 40,
 175         .bat_levels_noac  = sharpsl_battery_levels_noac,
 176         .bat_levels_acin  = sharpsl_battery_levels_acin,
 177         .status_high_acin = 188,
 178         .status_low_acin  = 178,
 179         .status_high_noac = 185,
 180         .status_low_noac  = 175,
 181 };
 182
 183 static struct platform_device *corgipm_device;
 184
 185 static int __devinit corgipm_init(void)
 186 {
 187         int ret;
 188
 189         if (!machine_is_corgi() && !machine_is_shepherd()
 190                         && !machine_is_husky())
 191                 return -ENODEV;
 192
 193         corgipm_device = platform_device_alloc("sharpsl-pm", -1);
 194         if (!corgipm_device)
 195                 return -ENOMEM;
 196
 197         if (!machine_is_corgi())
 198             corgi_pm_machinfo.batfull_irq = 1;
 199
 200         corgipm_device->dev.platform_data = &corgi_pm_machinfo;
 201         ret = platform_device_add(corgipm_device);
 202
 203         if (ret)
 204                 platform_device_put(corgipm_device);
 205
 206         return ret;
 207 }
 208
 209 static void corgipm_exit(void)
 210 {
 211         platform_device_unregister(corgipm_device);
 212 }
 213
 214 module_init(corgipm_init);
 215 module_exit(corgipm_exit);