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/pxa-regs.h>
  28 #include <mach/pxa2xx-regs.h>
  29 #include <mach/pxa2xx-gpio.h>
  30 #include "sharpsl.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 void corgi_charger_init(void)
  40 {
  41         pxa_gpio_mode(CORGI_GPIO_ADC_TEMP_ON | GPIO_OUT);
  42         pxa_gpio_mode(CORGI_GPIO_CHRG_ON | GPIO_OUT);
  43         pxa_gpio_mode(CORGI_GPIO_CHRG_UKN | GPIO_OUT);
  44         pxa_gpio_mode(CORGI_GPIO_KEY_INT | GPIO_IN);
  45         sharpsl_pm_pxa_init();
  46 }
  47
  48 static void corgi_measure_temp(int on)
  49 {
  50         if (on)
  51                 GPSR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_ON);
  52         else
  53                 GPCR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_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                         GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
  61                         GPSR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
  62                 } else {
  63                         GPSR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
  64                         GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
  65                 }
  66         } else {
  67                 GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
  68                 GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
  69         }
  70 }
  71
  72 static void corgi_discharge(int on)
  73 {
  74         if (on)
  75                 GPSR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
  76         else
  77                 GPCR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
  78 }
  79
  80 static void corgi_presuspend(void)
  81 {
  82         int i;
  83         unsigned long wakeup_mask;
  84
  85         /* charging , so CHARGE_ON bit is HIGH during OFF. */
  86         if (READ_GPIO_BIT(CORGI_GPIO_CHRG_ON))
  87                 PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_ON);
  88         else
  89                 PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_ON);
  90
  91         if (READ_GPIO_BIT(CORGI_GPIO_LED_ORANGE))
  92                 PGSR0 |= GPIO_bit(CORGI_GPIO_LED_ORANGE);
  93         else
  94                 PGSR0 &= ~GPIO_bit(CORGI_GPIO_LED_ORANGE);
  95
  96         if (READ_GPIO_BIT(CORGI_GPIO_CHRG_UKN))
  97                 PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_UKN);
  98         else
  99                 PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_UKN);
 100
 101         /* Resume on keyboard power key */
 102         PGSR2 = (PGSR2 & ~CORGI_GPIO_ALL_STROBE_BIT) | CORGI_GPIO_STROBE_BIT(0);
 103
 104         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);
 105
 106         if (!machine_is_corgi())
 107                 wakeup_mask |= GPIO_bit(CORGI_GPIO_MAIN_BAT_LOW);
 108
 109         PWER = wakeup_mask | PWER_RTC;
 110         PRER = wakeup_mask;
 111         PFER = wakeup_mask;
 112
 113         for (i = 0; i <=15; i++) {
 114                 if (PRER & PFER & GPIO_bit(i)) {
 115                         if (GPLR0 & GPIO_bit(i) )
 116                                 PRER &= ~GPIO_bit(i);
 117                         else
 118                                 PFER &= ~GPIO_bit(i);
 119                 }
 120         }
 121 }
 122
 123 static void corgi_postsuspend(void)
 124 {
 125 }
 126
 127 /*
 128  * Check what brought us out of the suspend.
 129  * Return: 0 to sleep, otherwise wake
 130  */
 131 static int corgi_should_wakeup(unsigned int resume_on_alarm)
 132 {
 133         int is_resume = 0;
 134
 135         dev_dbg(sharpsl_pm.dev, "GPLR0 = %x,%x\n", GPLR0, PEDR);
 136
 137         if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
 138                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 139                         /* charge on */
 140                         dev_dbg(sharpsl_pm.dev, "ac insert\n");
 141                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 142                 } else {
 143                         /* charge off */
 144                         dev_dbg(sharpsl_pm.dev, "ac remove\n");
 145                         sharpsl_pm_led(SHARPSL_LED_OFF);
 146                         sharpsl_pm.machinfo->charge(0);
 147                         sharpsl_pm.charge_mode = CHRG_OFF;
 148                 }
 149         }
 150
 151         if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
 152                 dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
 153
 154         if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
 155                 is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
 156
 157         if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
 158                 is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
 159
 160         if (resume_on_alarm && (PEDR & PWER_RTC))
 161                 is_resume |= PWER_RTC;
 162
 163         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
 164         return is_resume;
 165 }
 166
 167 static unsigned long corgi_charger_wakeup(void)
 168 {
 169         return ~GPLR0 & ( GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) );
 170 }
 171
 172 unsigned long corgipm_read_devdata(int type)
 173 {
 174         switch(type) {
 175         case SHARPSL_STATUS_ACIN:
 176                 return ((GPLR(CORGI_GPIO_AC_IN) & GPIO_bit(CORGI_GPIO_AC_IN)) != 0);
 177         case SHARPSL_STATUS_LOCK:
 178                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
 179         case SHARPSL_STATUS_CHRGFULL:
 180                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
 181         case SHARPSL_STATUS_FATAL:
 182                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
 183         case SHARPSL_ACIN_VOLT:
 184                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 185         case SHARPSL_BATT_TEMP:
 186                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 187         case SHARPSL_BATT_VOLT:
 188         default:
 189                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 190         }
 191 }
 192
 193 static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
 194         .init            = corgi_charger_init,
 195         .exit            = sharpsl_pm_pxa_remove,
 196         .gpio_batlock    = CORGI_GPIO_BAT_COVER,
 197         .gpio_acin       = CORGI_GPIO_AC_IN,
 198         .gpio_batfull    = CORGI_GPIO_CHRG_FULL,
 199         .discharge       = corgi_discharge,
 200         .charge          = corgi_charge,
 201         .measure_temp    = corgi_measure_temp,
 202         .presuspend      = corgi_presuspend,
 203         .postsuspend     = corgi_postsuspend,
 204         .read_devdata    = corgipm_read_devdata,
 205         .charger_wakeup  = corgi_charger_wakeup,
 206         .should_wakeup   = corgi_should_wakeup,
 207 #if defined(CONFIG_LCD_CORGI)
 208         .backlight_limit = corgi_lcd_limit_intensity,
 209 #elif defined(CONFIG_BACKLIGHT_CORGI)
 210         .backlight_limit = corgibl_limit_intensity,
 211 #endif
 212         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 213         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 214         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 215         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 216         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 217         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 218         .bat_levels       = 40,
 219         .bat_levels_noac  = spitz_battery_levels_noac,
 220         .bat_levels_acin  = spitz_battery_levels_acin,
 221         .status_high_acin = 188,
 222         .status_low_acin  = 178,
 223         .status_high_noac = 185,
 224         .status_low_noac  = 175,
 225 };
 226
 227 static struct platform_device *corgipm_device;
 228
 229 static int __devinit corgipm_init(void)
 230 {
 231         int ret;
 232
 233         if (!machine_is_corgi() && !machine_is_shepherd()
 234                         && !machine_is_husky())
 235                 return -ENODEV;
 236
 237         corgipm_device = platform_device_alloc("sharpsl-pm", -1);
 238         if (!corgipm_device)
 239                 return -ENOMEM;
 240
 241         if (!machine_is_corgi())
 242             corgi_pm_machinfo.batfull_irq = 1;
 243
 244         corgipm_device->dev.platform_data = &corgi_pm_machinfo;
 245         ret = platform_device_add(corgipm_device);
 246
 247         if (ret)
 248                 platform_device_put(corgipm_device);
 249
 250         return ret;
 251 }
 252
 253 static void corgipm_exit(void)
 254 {
 255         platform_device_unregister(corgipm_device);
 256 }
 257
 258 module_init(corgipm_init);
 259 module_exit(corgipm_exit);