arch/arm/mach-pxa/spitz_pm.c

   1 /*
   2  * Battery and Power Management code for the Sharp SL-Cxx00
   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/spitz.h>
  28 #include "pxa27x.h"
  29 #include "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 int spitz_last_ac_status;
  41
  42 static struct gpio spitz_charger_gpios[] = {
  43         { SPITZ_GPIO_KEY_INT,   GPIOF_IN, "Keyboard Interrupt" },
  44         { SPITZ_GPIO_SYNC,      GPIOF_IN, "Sync" },
  45         { SPITZ_GPIO_AC_IN,     GPIOF_IN, "Charger Detection" },
  46         { SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
  47         { SPITZ_GPIO_JK_B,        GPIOF_OUT_INIT_LOW, "JK B" },
  48         { SPITZ_GPIO_CHRG_ON,     GPIOF_OUT_INIT_LOW, "Charger On" },
  49 };
  50
  51 static void spitz_charger_init(void)
  52 {
  53         gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios));
  54 }
  55
  56 static void spitz_measure_temp(int on)
  57 {
  58         gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
  59 }
  60
  61 static void spitz_charge(int on)
  62 {
  63         if (on) {
  64                 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
  65                         gpio_set_value(SPITZ_GPIO_JK_B, 1);
  66                         gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
  67                 } else {
  68                         gpio_set_value(SPITZ_GPIO_JK_B, 0);
  69                         gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
  70                 }
  71         } else {
  72                 gpio_set_value(SPITZ_GPIO_JK_B, 0);
  73                 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
  74         }
  75 }
  76
  77 static void spitz_discharge(int on)
  78 {
  79         gpio_set_value(SPITZ_GPIO_JK_A, on);
  80 }
  81
  82 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
  83    on the power bus which the green led on spitz provides */
  84 static void spitz_discharge1(int on)
  85 {
  86         gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
  87 }
  88
  89 static unsigned long gpio18_config = GPIO18_GPIO;
  90
  91 static void spitz_presuspend(void)
  92 {
  93         spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
  94
  95         /* GPIO Sleep Register */
  96         PGSR0 = 0x00144018;
  97         PGSR1 = 0x00EF0000;
  98         if (machine_is_akita()) {
  99                 PGSR2 = 0x2121C000;
 100                 PGSR3 = 0x00600400;
 101         } else {
 102                 PGSR2 = 0x0121C000;
 103                 PGSR3 = 0x00600000;
 104         }
 105
 106         PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
 107         PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
 108         PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
 109         PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
 110         PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
 111
 112         pxa2xx_mfp_config(&gpio18_config, 1);
 113         gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown");
 114         gpio_free(18);
 115
 116         PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
 117         PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 118         PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
 119         PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 120         PKSR = 0xffffffff; /* clear */
 121
 122         /* nRESET_OUT Disable */
 123         PSLR |= PSLR_SL_ROD;
 124
 125         /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
 126         PCFR = PCFR_GPR_EN | PCFR_OPDE;
 127 }
 128
 129 static void spitz_postsuspend(void)
 130 {
 131 }
 132
 133 static int spitz_should_wakeup(unsigned int resume_on_alarm)
 134 {
 135         int is_resume = 0;
 136         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 137
 138         if (spitz_last_ac_status != acin) {
 139                 if (acin) {
 140                         /* charge on */
 141                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 142                         dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
 143                 } else {
 144                         /* charge off */
 145                         dev_dbg(sharpsl_pm.dev, "AC Removed\n");
 146                         sharpsl_pm_led(SHARPSL_LED_OFF);
 147                         sharpsl_pm.machinfo->charge(0);
 148                         sharpsl_pm.charge_mode = CHRG_OFF;
 149                 }
 150                 spitz_last_ac_status = acin;
 151                 /* Return to suspend as this must be what we were woken for */
 152                 return 0;
 153         }
 154
 155         if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
 156                 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
 157
 158         if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
 159                 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
 160
 161         if (resume_on_alarm && (PEDR & PWER_RTC))
 162                 is_resume |= PWER_RTC;
 163
 164         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume);
 165         return is_resume;
 166 }
 167
 168 static bool spitz_charger_wakeup(void)
 169 {
 170         return !gpio_get_value(SPITZ_GPIO_KEY_INT) ||
 171                 gpio_get_value(SPITZ_GPIO_SYNC);
 172 }
 173
 174 unsigned long spitzpm_read_devdata(int type)
 175 {
 176         switch (type) {
 177         case SHARPSL_STATUS_ACIN:
 178                 return !gpio_get_value(SPITZ_GPIO_AC_IN);
 179         case SHARPSL_STATUS_LOCK:
 180                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
 181         case SHARPSL_STATUS_CHRGFULL:
 182                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
 183         case SHARPSL_STATUS_FATAL:
 184                 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
 185         case SHARPSL_ACIN_VOLT:
 186                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 187         case SHARPSL_BATT_TEMP:
 188                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 189         case SHARPSL_BATT_VOLT:
 190         default:
 191                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 192         }
 193 }
 194
 195 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
 196         .init             = spitz_charger_init,
 197         .exit             = NULL,
 198         .gpio_batlock     = SPITZ_GPIO_BAT_COVER,
 199         .gpio_acin        = SPITZ_GPIO_AC_IN,
 200         .gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
 201         .batfull_irq      = 1,
 202         .gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
 203         .discharge        = spitz_discharge,
 204         .discharge1       = spitz_discharge1,
 205         .charge           = spitz_charge,
 206         .measure_temp     = spitz_measure_temp,
 207         .presuspend       = spitz_presuspend,
 208         .postsuspend      = spitz_postsuspend,
 209         .read_devdata     = spitzpm_read_devdata,
 210         .charger_wakeup   = spitz_charger_wakeup,
 211         .should_wakeup    = spitz_should_wakeup,
 212 #if defined(CONFIG_LCD_CORGI)
 213         .backlight_limit = corgi_lcd_limit_intensity,
 214 #endif
 215         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 216         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 217         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 218         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 219         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 220         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 221         .bat_levels       = 40,
 222         .bat_levels_noac  = sharpsl_battery_levels_noac,
 223         .bat_levels_acin  = sharpsl_battery_levels_acin,
 224         .status_high_acin = 188,
 225         .status_low_acin  = 178,
 226         .status_high_noac = 185,
 227         .status_low_noac  = 175,
 228 };
 229
 230 static struct platform_device *spitzpm_device;
 231
 232 static int spitzpm_init(void)
 233 {
 234         int ret;
 235
 236         if (!machine_is_spitz() && !machine_is_akita()
 237                         && !machine_is_borzoi())
 238                 return -ENODEV;
 239
 240         spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
 241         if (!spitzpm_device)
 242                 return -ENOMEM;
 243
 244         spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
 245         ret = platform_device_add(spitzpm_device);
 246
 247         if (ret)
 248                 platform_device_put(spitzpm_device);
 249
 250         return ret;
 251 }
 252
 253 static void spitzpm_exit(void)
 254 {
 255         platform_device_unregister(spitzpm_device);
 256 }
 257
 258 module_init(spitzpm_init);
 259 module_exit(spitzpm_exit);