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 }
  45
  46 static void corgi_measure_temp(int on)
  47 {
  48         if (on)
  49                 GPSR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_ON);
  50         else
  51                 GPCR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_ON);
  52 }
  53
  54 static void corgi_charge(int on)
  55 {
  56         if (on) {
  57                 if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
  58                         GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
  59                         GPSR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
  60                 } else {
  61                         GPSR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
  62                         GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
  63                 }
  64         } else {
  65                 GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
  66                 GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
  67         }
  68 }
  69
  70 static void corgi_discharge(int on)
  71 {
  72         if (on)
  73                 GPSR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
  74         else
  75                 GPCR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
  76 }
  77
  78 static void corgi_presuspend(void)
  79 {
  80         int i;
  81         unsigned long wakeup_mask;
  82
  83         /* charging , so CHARGE_ON bit is HIGH during OFF. */
  84         if (READ_GPIO_BIT(CORGI_GPIO_CHRG_ON))
  85                 PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_ON);
  86         else
  87                 PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_ON);
  88
  89         if (READ_GPIO_BIT(CORGI_GPIO_LED_ORANGE))
  90                 PGSR0 |= GPIO_bit(CORGI_GPIO_LED_ORANGE);
  91         else
  92                 PGSR0 &= ~GPIO_bit(CORGI_GPIO_LED_ORANGE);
  93
  94         if (READ_GPIO_BIT(CORGI_GPIO_CHRG_UKN))
  95                 PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_UKN);
  96         else
  97                 PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_UKN);
  98
  99         /* Resume on keyboard power key */
 100         PGSR2 = (PGSR2 & ~CORGI_GPIO_ALL_STROBE_BIT) | CORGI_GPIO_STROBE_BIT(0);
 101
 102         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);
 103
 104         if (!machine_is_corgi())
 105                 wakeup_mask |= GPIO_bit(CORGI_GPIO_MAIN_BAT_LOW);
 106
 107         PWER = wakeup_mask | PWER_RTC;
 108         PRER = wakeup_mask;
 109         PFER = wakeup_mask;
 110
 111         for (i = 0; i <=15; i++) {
 112                 if (PRER & PFER & GPIO_bit(i)) {
 113                         if (GPLR0 & GPIO_bit(i) )
 114                                 PRER &= ~GPIO_bit(i);
 115                         else
 116                                 PFER &= ~GPIO_bit(i);
 117                 }
 118         }
 119 }
 120
 121 static void corgi_postsuspend(void)
 122 {
 123 }
 124
 125 /*
 126  * Check what brought us out of the suspend.
 127  * Return: 0 to sleep, otherwise wake
 128  */
 129 static int corgi_should_wakeup(unsigned int resume_on_alarm)
 130 {
 131         int is_resume = 0;
 132
 133         dev_dbg(sharpsl_pm.dev, "GPLR0 = %x,%x\n", GPLR0, PEDR);
 134
 135         if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
 136                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 137                         /* charge on */
 138                         dev_dbg(sharpsl_pm.dev, "ac insert\n");
 139                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 140                 } else {
 141                         /* charge off */
 142                         dev_dbg(sharpsl_pm.dev, "ac remove\n");
 143                         sharpsl_pm_led(SHARPSL_LED_OFF);
 144                         sharpsl_pm.machinfo->charge(0);
 145                         sharpsl_pm.charge_mode = CHRG_OFF;
 146                 }
 147         }
 148
 149         if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
 150                 dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
 151
 152         if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
 153                 is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
 154
 155         if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
 156                 is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
 157
 158         if (resume_on_alarm && (PEDR & PWER_RTC))
 159                 is_resume |= PWER_RTC;
 160
 161         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
 162         return is_resume;
 163 }
 164
 165 static unsigned long corgi_charger_wakeup(void)
 166 {
 167         return ~GPLR0 & ( GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) );
 168 }
 169
 170 unsigned long corgipm_read_devdata(int type)
 171 {
 172         switch(type) {
 173         case SHARPSL_STATUS_ACIN:
 174                 return ((GPLR(CORGI_GPIO_AC_IN) & GPIO_bit(CORGI_GPIO_AC_IN)) != 0);
 175         case SHARPSL_STATUS_LOCK:
 176                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
 177         case SHARPSL_STATUS_CHRGFULL:
 178                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
 179         case SHARPSL_STATUS_FATAL:
 180                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
 181         case SHARPSL_ACIN_VOLT:
 182                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 183         case SHARPSL_BATT_TEMP:
 184                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 185         case SHARPSL_BATT_VOLT:
 186         default:
 187                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 188         }
 189 }
 190
 191 static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
 192         .init            = corgi_charger_init,
 193         .exit            = NULL,
 194         .gpio_batlock    = CORGI_GPIO_BAT_COVER,
 195         .gpio_acin       = CORGI_GPIO_AC_IN,
 196         .gpio_batfull    = CORGI_GPIO_CHRG_FULL,
 197         .discharge       = corgi_discharge,
 198         .charge          = corgi_charge,
 199         .measure_temp    = corgi_measure_temp,
 200         .presuspend      = corgi_presuspend,
 201         .postsuspend     = corgi_postsuspend,
 202         .read_devdata    = corgipm_read_devdata,
 203         .charger_wakeup  = corgi_charger_wakeup,
 204         .should_wakeup   = corgi_should_wakeup,
 205 #if defined(CONFIG_LCD_CORGI)
 206         .backlight_limit = corgi_lcd_limit_intensity,
 207 #elif defined(CONFIG_BACKLIGHT_CORGI)
 208         .backlight_limit = corgibl_limit_intensity,
 209 #endif
 210         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 211         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 212         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 213         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 214         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 215         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 216         .bat_levels       = 40,
 217         .bat_levels_noac  = spitz_battery_levels_noac,
 218         .bat_levels_acin  = spitz_battery_levels_acin,
 219         .status_high_acin = 188,
 220         .status_low_acin  = 178,
 221         .status_high_noac = 185,
 222         .status_low_noac  = 175,
 223 };
 224
 225 static struct platform_device *corgipm_device;
 226
 227 static int __devinit corgipm_init(void)
 228 {
 229         int ret;
 230
 231         if (!machine_is_corgi() && !machine_is_shepherd()
 232                         && !machine_is_husky())
 233                 return -ENODEV;
 234
 235         corgipm_device = platform_device_alloc("sharpsl-pm", -1);
 236         if (!corgipm_device)
 237                 return -ENOMEM;
 238
 239         if (!machine_is_corgi())
 240             corgi_pm_machinfo.batfull_irq = 1;
 241
 242         corgipm_device->dev.platform_data = &corgi_pm_machinfo;
 243         ret = platform_device_add(corgipm_device);
 244
 245         if (ret)
 246                 platform_device_put(corgipm_device);
 247
 248         return ret;
 249 }
 250
 251 static void corgipm_exit(void)
 252 {
 253         platform_device_unregister(corgipm_device);
 254 }
 255
 256 module_init(corgipm_init);
 257 module_exit(corgipm_exit);