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
  23 #include <asm/irq.h>
  24 #include <asm/mach-types.h>
  25 #include <mach/hardware.h>
  26
  27 #include <mach/corgi.h>
  28 #include <mach/pxa2xx-regs.h>
  29 #include <mach/sharpsl_pm.h>
  30
  31 #include "generic.h"
  32
  33 #define SHARPSL_CHARGE_ON_VOLT         0x99  /* 2.9V */
  34 #define SHARPSL_CHARGE_ON_TEMP         0xe0  /* 2.9V */
  35 #define SHARPSL_CHARGE_ON_ACIN_HIGH    0x9b  /* 6V */
  36 #define SHARPSL_CHARGE_ON_ACIN_LOW     0x34  /* 2V */
  37 #define SHARPSL_FATAL_ACIN_VOLT        182   /* 3.45V */
  38 #define SHARPSL_FATAL_NOACIN_VOLT      170   /* 3.40V */
  39
  40 static struct gpio charger_gpios[] = {
  41         { CORGI_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
  42         { CORGI_GPIO_CHRG_ON,     GPIOF_OUT_INIT_LOW, "Charger On" },
  43         { CORGI_GPIO_CHRG_UKN,    GPIOF_OUT_INIT_LOW, "Charger Unknown" },
  44         { CORGI_GPIO_AC_IN,       GPIOF_IN, "Charger Detection" },
  45         { CORGI_GPIO_KEY_INT,     GPIOF_IN, "Key Interrupt" },
  46         { CORGI_GPIO_WAKEUP,      GPIOF_IN, "System wakeup notification" },
  47 };
  48
  49 static void corgi_charger_init(void)
  50 {
  51         gpio_request_array(ARRAY_AND_SIZE(charger_gpios));
  52 }
  53
  54 static void corgi_measure_temp(int on)
  55 {
  56         gpio_set_value(CORGI_GPIO_ADC_TEMP_ON, on);
  57 }
  58
  59 static void corgi_charge(int on)
  60 {
  61         if (on) {
  62                 if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
  63                         gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
  64                         gpio_set_value(CORGI_GPIO_CHRG_UKN, 1);
  65                 } else {
  66                         gpio_set_value(CORGI_GPIO_CHRG_ON, 1);
  67                         gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
  68                 }
  69         } else {
  70                 gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
  71                 gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
  72         }
  73 }
  74
  75 static void corgi_discharge(int on)
  76 {
  77         gpio_set_value(CORGI_GPIO_DISCHARGE_ON, on);
  78 }
  79
  80 static void corgi_presuspend(void)
  81 {
  82 }
  83
  84 static void corgi_postsuspend(void)
  85 {
  86 }
  87
  88 /*
  89  * Check what brought us out of the suspend.
  90  * Return: 0 to sleep, otherwise wake
  91  */
  92 static int corgi_should_wakeup(unsigned int resume_on_alarm)
  93 {
  94         int is_resume = 0;
  95
  96         dev_dbg(sharpsl_pm.dev, "PEDR = %x, GPIO_AC_IN = %d, "
  97                 "GPIO_CHRG_FULL = %d, GPIO_KEY_INT = %d, GPIO_WAKEUP = %d\n",
  98                 PEDR, gpio_get_value(CORGI_GPIO_AC_IN),
  99                 gpio_get_value(CORGI_GPIO_CHRG_FULL),
 100                 gpio_get_value(CORGI_GPIO_KEY_INT),
 101                 gpio_get_value(CORGI_GPIO_WAKEUP));
 102
 103         if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
 104                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 105                         /* charge on */
 106                         dev_dbg(sharpsl_pm.dev, "ac insert\n");
 107                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 108                 } else {
 109                         /* charge off */
 110                         dev_dbg(sharpsl_pm.dev, "ac remove\n");
 111                         sharpsl_pm_led(SHARPSL_LED_OFF);
 112                         sharpsl_pm.machinfo->charge(0);
 113                         sharpsl_pm.charge_mode = CHRG_OFF;
 114                 }
 115         }
 116
 117         if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
 118                 dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
 119
 120         if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
 121                 is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
 122
 123         if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
 124                 is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
 125
 126         if (resume_on_alarm && (PEDR & PWER_RTC))
 127                 is_resume |= PWER_RTC;
 128
 129         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
 130         return is_resume;
 131 }
 132
 133 static unsigned long corgi_charger_wakeup(void)
 134 {
 135         unsigned long ret;
 136
 137         ret = (!gpio_get_value(CORGI_GPIO_AC_IN) << GPIO_bit(CORGI_GPIO_AC_IN))
 138                 | (!gpio_get_value(CORGI_GPIO_KEY_INT)
 139                 << GPIO_bit(CORGI_GPIO_KEY_INT))
 140                 | (!gpio_get_value(CORGI_GPIO_WAKEUP)
 141                 << GPIO_bit(CORGI_GPIO_WAKEUP));
 142         return ret;
 143 }
 144
 145 unsigned long corgipm_read_devdata(int type)
 146 {
 147         switch(type) {
 148         case SHARPSL_STATUS_ACIN:
 149                 return !gpio_get_value(CORGI_GPIO_AC_IN);
 150         case SHARPSL_STATUS_LOCK:
 151                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
 152         case SHARPSL_STATUS_CHRGFULL:
 153                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
 154         case SHARPSL_STATUS_FATAL:
 155                 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
 156         case SHARPSL_ACIN_VOLT:
 157                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 158         case SHARPSL_BATT_TEMP:
 159                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 160         case SHARPSL_BATT_VOLT:
 161         default:
 162                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 163         }
 164 }
 165
 166 static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
 167         .init            = corgi_charger_init,
 168         .exit            = NULL,
 169         .gpio_batlock    = CORGI_GPIO_BAT_COVER,
 170         .gpio_acin       = CORGI_GPIO_AC_IN,
 171         .gpio_batfull    = CORGI_GPIO_CHRG_FULL,
 172         .discharge       = corgi_discharge,
 173         .charge          = corgi_charge,
 174         .measure_temp    = corgi_measure_temp,
 175         .presuspend      = corgi_presuspend,
 176         .postsuspend     = corgi_postsuspend,
 177         .read_devdata    = corgipm_read_devdata,
 178         .charger_wakeup  = corgi_charger_wakeup,
 179         .should_wakeup   = corgi_should_wakeup,
 180 #if defined(CONFIG_LCD_CORGI)
 181         .backlight_limit = corgi_lcd_limit_intensity,
 182 #endif
 183         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 184         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 185         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 186         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 187         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 188         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 189         .bat_levels       = 40,
 190         .bat_levels_noac  = sharpsl_battery_levels_noac,
 191         .bat_levels_acin  = sharpsl_battery_levels_acin,
 192         .status_high_acin = 188,
 193         .status_low_acin  = 178,
 194         .status_high_noac = 185,
 195         .status_low_noac  = 175,
 196 };
 197
 198 static struct platform_device *corgipm_device;
 199
 200 static int __devinit corgipm_init(void)
 201 {
 202         int ret;
 203
 204         if (!machine_is_corgi() && !machine_is_shepherd()
 205                         && !machine_is_husky())
 206                 return -ENODEV;
 207
 208         corgipm_device = platform_device_alloc("sharpsl-pm", -1);
 209         if (!corgipm_device)
 210                 return -ENOMEM;
 211
 212         if (!machine_is_corgi())
 213             corgi_pm_machinfo.batfull_irq = 1;
 214
 215         corgipm_device->dev.platform_data = &corgi_pm_machinfo;
 216         ret = platform_device_add(corgipm_device);
 217
 218         if (ret)
 219                 platform_device_put(corgipm_device);
 220
 221         return ret;
 222 }
 223
 224 static void corgipm_exit(void)
 225 {
 226         platform_device_unregister(corgipm_device);
 227 }
 228
 229 module_init(corgipm_init);
 230 module_exit(corgipm_exit);