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/sharpsl.h>
  27 #include <mach/corgi.h>
  28 #include <mach/pxa2xx-regs.h>
  29
  30 #include "generic.h"
  31 #include "sharpsl.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_KEY_INT,     GPIOF_IN, "Key Interrupt" },
  45 };
  46
  47 static void corgi_charger_init(void)
  48 {
  49         gpio_request_array(ARRAY_AND_SIZE(charger_gpios));
  50 }
  51
  52 static void corgi_measure_temp(int on)
  53 {
  54         gpio_set_value(CORGI_GPIO_ADC_TEMP_ON, on);
  55 }
  56
  57 static void corgi_charge(int on)
  58 {
  59         if (on) {
  60                 if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
  61                         gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
  62                         gpio_set_value(CORGI_GPIO_CHRG_UKN, 1);
  63                 } else {
  64                         gpio_set_value(CORGI_GPIO_CHRG_ON, 1);
  65                         gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
  66                 }
  67         } else {
  68                 gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
  69                 gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
  70         }
  71 }
  72
  73 static void corgi_discharge(int on)
  74 {
  75         gpio_set_value(CORGI_GPIO_DISCHARGE_ON, on);
  76 }
  77
  78 static void corgi_presuspend(void)
  79 {
  80 }
  81
  82 static void corgi_postsuspend(void)
  83 {
  84 }
  85
  86 /*
  87  * Check what brought us out of the suspend.
  88  * Return: 0 to sleep, otherwise wake
  89  */
  90 static int corgi_should_wakeup(unsigned int resume_on_alarm)
  91 {
  92         int is_resume = 0;
  93
  94         dev_dbg(sharpsl_pm.dev, "GPLR0 = %x,%x\n", GPLR0, PEDR);
  95
  96         if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
  97                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
  98                         /* charge on */
  99                         dev_dbg(sharpsl_pm.dev, "ac insert\n");
 100                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 101                 } else {
 102                         /* charge off */
 103                         dev_dbg(sharpsl_pm.dev, "ac remove\n");
 104                         sharpsl_pm_led(SHARPSL_LED_OFF);
 105                         sharpsl_pm.machinfo->charge(0);
 106                         sharpsl_pm.charge_mode = CHRG_OFF;
 107                 }
 108         }
 109
 110         if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
 111                 dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
 112
 113         if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
 114                 is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
 115
 116         if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
 117                 is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
 118
 119         if (resume_on_alarm && (PEDR & PWER_RTC))
 120                 is_resume |= PWER_RTC;
 121
 122         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
 123         return is_resume;
 124 }
 125
 126 static unsigned long corgi_charger_wakeup(void)
 127 {
 128         return ~GPLR0 & ( GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) );
 129 }
 130
 131 unsigned long corgipm_read_devdata(int type)
 132 {
 133         switch(type) {
 134         case SHARPSL_STATUS_ACIN:
 135                 return ((GPLR(CORGI_GPIO_AC_IN) & GPIO_bit(CORGI_GPIO_AC_IN)) != 0);
 136         case SHARPSL_STATUS_LOCK:
 137                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
 138         case SHARPSL_STATUS_CHRGFULL:
 139                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
 140         case SHARPSL_STATUS_FATAL:
 141                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
 142         case SHARPSL_ACIN_VOLT:
 143                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 144         case SHARPSL_BATT_TEMP:
 145                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 146         case SHARPSL_BATT_VOLT:
 147         default:
 148                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 149         }
 150 }
 151
 152 static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
 153         .init            = corgi_charger_init,
 154         .exit            = NULL,
 155         .gpio_batlock    = CORGI_GPIO_BAT_COVER,
 156         .gpio_acin       = CORGI_GPIO_AC_IN,
 157         .gpio_batfull    = CORGI_GPIO_CHRG_FULL,
 158         .discharge       = corgi_discharge,
 159         .charge          = corgi_charge,
 160         .measure_temp    = corgi_measure_temp,
 161         .presuspend      = corgi_presuspend,
 162         .postsuspend     = corgi_postsuspend,
 163         .read_devdata    = corgipm_read_devdata,
 164         .charger_wakeup  = corgi_charger_wakeup,
 165         .should_wakeup   = corgi_should_wakeup,
 166 #if defined(CONFIG_LCD_CORGI)
 167         .backlight_limit = corgi_lcd_limit_intensity,
 168 #elif defined(CONFIG_BACKLIGHT_CORGI)
 169         .backlight_limit = corgibl_limit_intensity,
 170 #endif
 171         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 172         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 173         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 174         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 175         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 176         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 177         .bat_levels       = 40,
 178         .bat_levels_noac  = sharpsl_battery_levels_noac,
 179         .bat_levels_acin  = sharpsl_battery_levels_acin,
 180         .status_high_acin = 188,
 181         .status_low_acin  = 178,
 182         .status_high_noac = 185,
 183         .status_low_noac  = 175,
 184 };
 185
 186 static struct platform_device *corgipm_device;
 187
 188 static int __devinit corgipm_init(void)
 189 {
 190         int ret;
 191
 192         if (!machine_is_corgi() && !machine_is_shepherd()
 193                         && !machine_is_husky())
 194                 return -ENODEV;
 195
 196         corgipm_device = platform_device_alloc("sharpsl-pm", -1);
 197         if (!corgipm_device)
 198                 return -ENOMEM;
 199
 200         if (!machine_is_corgi())
 201             corgi_pm_machinfo.batfull_irq = 1;
 202
 203         corgipm_device->dev.platform_data = &corgi_pm_machinfo;
 204         ret = platform_device_add(corgipm_device);
 205
 206         if (ret)
 207                 platform_device_put(corgipm_device);
 208
 209         return ret;
 210 }
 211
 212 static void corgipm_exit(void)
 213 {
 214         platform_device_unregister(corgipm_device);
 215 }
 216
 217 module_init(corgipm_init);
 218 module_exit(corgipm_exit);