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/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/spitz.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 int spitz_last_ac_status;
  39
  40 static void spitz_charger_init(void)
  41 {
  42         pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN);
  43         pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
  44         sharpsl_pm_pxa_init();
  45 }
  46
  47 static void spitz_measure_temp(int on)
  48 {
  49         gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
  50 }
  51
  52 static void spitz_charge(int on)
  53 {
  54         if (on) {
  55                 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
  56                         gpio_set_value(SPITZ_GPIO_JK_B, 1);
  57                         gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
  58                 } else {
  59                         gpio_set_value(SPITZ_GPIO_JK_B, 0);
  60                         gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
  61                 }
  62         } else {
  63                 gpio_set_value(SPITZ_GPIO_JK_B, 0);
  64                 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
  65         }
  66 }
  67
  68 static void spitz_discharge(int on)
  69 {
  70         gpio_set_value(SPITZ_GPIO_JK_A, on);
  71 }
  72
  73 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
  74    on the power bus which the green led on spitz provides */
  75 static void spitz_discharge1(int on)
  76 {
  77         gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
  78 }
  79
  80 static void spitz_presuspend(void)
  81 {
  82         spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
  83
  84         /* GPIO Sleep Register */
  85         PGSR0 = 0x00144018;
  86         PGSR1 = 0x00EF0000;
  87         if (machine_is_akita()) {
  88                 PGSR2 = 0x2121C000;
  89                 PGSR3 = 0x00600400;
  90         } else {
  91                 PGSR2 = 0x0121C000;
  92                 PGSR3 = 0x00600000;
  93         }
  94
  95         PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
  96         PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
  97         PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
  98         PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
  99         PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
 100
 101         pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH);
 102
 103         PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
 104         PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 105         PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
 106         PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 107         PKSR = 0xffffffff; // clear
 108
 109         /* nRESET_OUT Disable */
 110         PSLR |= PSLR_SL_ROD;
 111
 112         /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
 113         PCFR = PCFR_GPR_EN | PCFR_OPDE;
 114 }
 115
 116 static void spitz_postsuspend(void)
 117 {
 118         pxa_gpio_mode(GPIO18_RDY_MD);
 119         pxa_gpio_mode(10 | GPIO_IN);
 120 }
 121
 122 static int spitz_should_wakeup(unsigned int resume_on_alarm)
 123 {
 124         int is_resume = 0;
 125         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 126
 127         if (spitz_last_ac_status != acin) {
 128                 if (acin) {
 129                         /* charge on */
 130                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 131                         dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
 132                 } else {
 133                         /* charge off */
 134                         dev_dbg(sharpsl_pm.dev, "AC Removed\n");
 135                         sharpsl_pm_led(SHARPSL_LED_OFF);
 136                         sharpsl_pm.machinfo->charge(0);
 137                         sharpsl_pm.charge_mode = CHRG_OFF;
 138                 }
 139                 spitz_last_ac_status = acin;
 140                 /* Return to suspend as this must be what we were woken for */
 141                 return 0;
 142         }
 143
 144         if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
 145                 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
 146
 147         if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
 148                 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
 149
 150         if (resume_on_alarm && (PEDR & PWER_RTC))
 151                 is_resume |= PWER_RTC;
 152
 153         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
 154         return is_resume;
 155 }
 156
 157 static unsigned long spitz_charger_wakeup(void)
 158 {
 159         return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
 160 }
 161
 162 unsigned long spitzpm_read_devdata(int type)
 163 {
 164         switch(type) {
 165         case SHARPSL_STATUS_ACIN:
 166                 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0);
 167         case SHARPSL_STATUS_LOCK:
 168                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
 169         case SHARPSL_STATUS_CHRGFULL:
 170                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
 171         case SHARPSL_STATUS_FATAL:
 172                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
 173         case SHARPSL_ACIN_VOLT:
 174                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 175         case SHARPSL_BATT_TEMP:
 176                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 177         case SHARPSL_BATT_VOLT:
 178         default:
 179                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 180         }
 181 }
 182
 183 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
 184         .init             = spitz_charger_init,
 185         .exit             = sharpsl_pm_pxa_remove,
 186         .gpio_batlock     = SPITZ_GPIO_BAT_COVER,
 187         .gpio_acin        = SPITZ_GPIO_AC_IN,
 188         .gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
 189         .batfull_irq      = 1,
 190         .gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
 191         .discharge        = spitz_discharge,
 192         .discharge1       = spitz_discharge1,
 193         .charge           = spitz_charge,
 194         .measure_temp     = spitz_measure_temp,
 195         .presuspend       = spitz_presuspend,
 196         .postsuspend      = spitz_postsuspend,
 197         .read_devdata     = spitzpm_read_devdata,
 198         .charger_wakeup   = spitz_charger_wakeup,
 199         .should_wakeup    = spitz_should_wakeup,
 200 #if defined(CONFIG_LCD_CORGI)
 201         .backlight_limit = corgi_lcd_limit_intensity,
 202 #elif defined(CONFIG_BACKLIGHT_CORGI)
 203         .backlight_limit  = corgibl_limit_intensity,
 204 #endif
 205         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 206         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 207         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 208         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 209         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 210         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 211         .bat_levels       = 40,
 212         .bat_levels_noac  = spitz_battery_levels_noac,
 213         .bat_levels_acin  = spitz_battery_levels_acin,
 214         .status_high_acin = 188,
 215         .status_low_acin  = 178,
 216         .status_high_noac = 185,
 217         .status_low_noac  = 175,
 218 };
 219
 220 static struct platform_device *spitzpm_device;
 221
 222 static int __devinit spitzpm_init(void)
 223 {
 224         int ret;
 225
 226         if (!machine_is_spitz() && !machine_is_akita()
 227                         && !machine_is_borzoi())
 228                 return -ENODEV;
 229
 230         spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
 231         if (!spitzpm_device)
 232                 return -ENOMEM;
 233
 234         spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
 235         ret = platform_device_add(spitzpm_device);
 236
 237         if (ret)
 238                 platform_device_put(spitzpm_device);
 239
 240         return ret;
 241 }
 242
 243 static void spitzpm_exit(void)
 244 {
 245         platform_device_unregister(spitzpm_device);
 246 }
 247
 248 module_init(spitzpm_init);
 249 module_exit(spitzpm_exit);