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