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 <asm/apm.h>
  20 #include <asm/irq.h>
  21 #include <asm/mach-types.h>
  22 #include <asm/hardware.h>
  23 #include <asm/hardware/scoop.h>
  24
  25 #include <asm/arch/sharpsl.h>
  26 #include <asm/arch/corgi.h>
  27 #include <asm/arch/pxa-regs.h>
  28 #include "sharpsl.h"
  29
  30 static void corgi_charger_init(void)
  31 {
  32         pxa_gpio_mode(CORGI_GPIO_ADC_TEMP_ON | GPIO_OUT);
  33         pxa_gpio_mode(CORGI_GPIO_CHRG_ON | GPIO_OUT);
  34         pxa_gpio_mode(CORGI_GPIO_CHRG_UKN | GPIO_OUT);
  35         pxa_gpio_mode(CORGI_GPIO_KEY_INT | GPIO_IN);
  36 }
  37
  38 static void corgi_charge_led(int val)
  39 {
  40         if (val == SHARPSL_LED_ERROR) {
  41                 dev_dbg(sharpsl_pm.dev, "Charge LED Error\n");
  42         } else if (val == SHARPSL_LED_ON) {
  43                 dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
  44                 GPSR0 = GPIO_bit(CORGI_GPIO_LED_ORANGE);
  45         } else {
  46                 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
  47                 GPCR0 = GPIO_bit(CORGI_GPIO_LED_ORANGE);
  48         }
  49 }
  50
  51 static void corgi_measure_temp(int on)
  52 {
  53         if (on)
  54                 GPSR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_ON);
  55         else
  56                 GPCR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_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                         GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
  64                         GPSR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
  65                 } else {
  66                         GPSR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
  67                         GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
  68                 }
  69         } else {
  70                 GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
  71                 GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
  72         }
  73 }
  74
  75 static void corgi_discharge(int on)
  76 {
  77         if (on)
  78                 GPSR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
  79         else
  80                 GPCR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
  81 }
  82
  83 static void corgi_presuspend(void)
  84 {
  85         int i;
  86         unsigned long wakeup_mask;
  87
  88         /* charging , so CHARGE_ON bit is HIGH during OFF. */
  89         if (READ_GPIO_BIT(CORGI_GPIO_CHRG_ON))
  90                 PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_ON);
  91         else
  92                 PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_ON);
  93
  94         if (READ_GPIO_BIT(CORGI_GPIO_LED_ORANGE))
  95                 PGSR0 |= GPIO_bit(CORGI_GPIO_LED_ORANGE);
  96         else
  97                 PGSR0 &= ~GPIO_bit(CORGI_GPIO_LED_ORANGE);
  98
  99         if (READ_GPIO_BIT(CORGI_GPIO_CHRG_UKN))
 100                 PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_UKN);
 101         else
 102                 PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_UKN);
 103
 104         /* Resume on keyboard power key */
 105         PGSR2 = (PGSR2 & ~CORGI_GPIO_ALL_STROBE_BIT) | CORGI_GPIO_STROBE_BIT(0);
 106
 107         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);
 108
 109         if (!machine_is_corgi())
 110                 wakeup_mask |= GPIO_bit(CORGI_GPIO_MAIN_BAT_LOW);
 111
 112         PWER = wakeup_mask | PWER_RTC;
 113         PRER = wakeup_mask;
 114         PFER = wakeup_mask;
 115
 116         for (i = 0; i <=15; i++) {
 117                 if (PRER & PFER & GPIO_bit(i)) {
 118                         if (GPLR0 & GPIO_bit(i) )
 119                                 PRER &= ~GPIO_bit(i);
 120                         else
 121                                 PFER &= ~GPIO_bit(i);
 122                 }
 123         }
 124 }
 125
 126 static void corgi_postsuspend(void)
 127 {
 128 }
 129
 130 /*
 131  * Check what brought us out of the suspend.
 132  * Return: 0 to sleep, otherwise wake
 133  */
 134 static int corgi_should_wakeup(unsigned int resume_on_alarm)
 135 {
 136         int is_resume = 0;
 137
 138         dev_dbg(sharpsl_pm.dev, "GPLR0 = %x,%x\n", GPLR0, PEDR);
 139
 140         if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
 141                 if (STATUS_AC_IN()) {
 142                         /* charge on */
 143                         dev_dbg(sharpsl_pm.dev, "ac insert\n");
 144                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 145                 } else {
 146                         /* charge off */
 147                         dev_dbg(sharpsl_pm.dev, "ac remove\n");
 148                         CHARGE_LED_OFF();
 149                         CHARGE_OFF();
 150                         sharpsl_pm.charge_mode = CHRG_OFF;
 151                 }
 152         }
 153
 154         if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
 155                 dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
 156
 157         if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
 158                 is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
 159
 160         if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
 161                 is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
 162
 163         if (resume_on_alarm && (PEDR & PWER_RTC))
 164                 is_resume |= PWER_RTC;
 165
 166         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
 167         return is_resume;
 168 }
 169
 170 static unsigned long corgi_charger_wakeup(void)
 171 {
 172         return ~GPLR0 & ( GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) );
 173 }
 174
 175 static int corgi_acin_status(void)
 176 {
 177         return ((GPLR(CORGI_GPIO_AC_IN) & GPIO_bit(CORGI_GPIO_AC_IN)) != 0);
 178 }
 179
 180 static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
 181         .init            = corgi_charger_init,
 182         .gpio_batlock    = CORGI_GPIO_BAT_COVER,
 183         .gpio_acin       = CORGI_GPIO_AC_IN,
 184         .gpio_batfull    = CORGI_GPIO_CHRG_FULL,
 185         .status_acin     = corgi_acin_status,
 186         .discharge       = corgi_discharge,
 187         .charge          = corgi_charge,
 188         .chargeled       = corgi_charge_led,
 189         .measure_temp    = corgi_measure_temp,
 190         .presuspend      = corgi_presuspend,
 191         .postsuspend     = corgi_postsuspend,
 192         .charger_wakeup  = corgi_charger_wakeup,
 193         .should_wakeup   = corgi_should_wakeup,
 194         .bat_levels      = 40,
 195         .bat_levels_noac = spitz_battery_levels_noac,
 196         .bat_levels_acin = spitz_battery_levels_acin,
 197         .status_high_acin = 188,
 198         .status_low_acin  = 178,
 199         .status_high_noac = 185,
 200         .status_low_noac  = 175,
 201 };
 202
 203 static struct platform_device *corgipm_device;
 204
 205 static int __devinit corgipm_init(void)
 206 {
 207         int ret;
 208
 209         corgipm_device = platform_device_alloc("sharpsl-pm", -1);
 210         if (!corgipm_device)
 211                 return -ENOMEM;
 212
 213         corgipm_device->dev.platform_data = &corgi_pm_machinfo;
 214         ret = platform_device_add(corgipm_device);
 215
 216         if (ret)
 217                 platform_device_put(corgipm_device);
 218
 219         return ret;
 220 }
 221
 222 static void corgipm_exit(void)
 223 {
 224         platform_device_unregister(corgipm_device);
 225 }
 226
 227 module_init(corgipm_init);
 228 module_exit(corgipm_exit);