git.oblomov.eu Git - linux-2.6/blob - 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 <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 #include <asm/hardware/sharpsl_pm.h>
  25
  26 #include <asm/arch/sharpsl.h>
  27 #include <asm/arch/spitz.h>
  28 #include <asm/arch/pxa-regs.h>
  29 #include "sharpsl.h"
  30
  31 static int spitz_last_ac_status;
  32
  33 static void spitz_charger_init(void)
  34 {
  35         pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN);
  36         pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
  37         sharpsl_pm_pxa_init();
  38 }
  39
  40 static void spitz_measure_temp(int on)
  41 {
  42         if (on)
  43                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
  44         else
  45                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
  46 }
  47
  48 static void spitz_charge(int on)
  49 {
  50         if (on) {
  51                 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
  52                         set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
  53                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
  54                 } else {
  55                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
  56                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
  57                 }
  58         } else {
  59                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
  60                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
  61         }
  62 }
  63
  64 static void spitz_discharge(int on)
  65 {
  66         if (on)
  67                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
  68         else
  69                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
  70 }
  71
  72 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
  73    on the power bus which the green led on spitz provides */
  74 static void spitz_discharge1(int on)
  75 {
  76         if (on)
  77                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
  78         else
  79                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
  80 }
  81
  82 static void spitz_presuspend(void)
  83 {
  84         spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
  85
  86         /* GPIO Sleep Register */
  87         PGSR0 = 0x00144018;
  88         PGSR1 = 0x00EF0000;
  89         if (machine_is_akita()) {
  90                 PGSR2 = 0x2121C000;
  91                 PGSR3 = 0x00600400;
  92         } else {
  93                 PGSR2 = 0x0121C000;
  94                 PGSR3 = 0x00600000;
  95         }
  96
  97         PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
  98         PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
  99         PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
 100         PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
 101         PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
 102
 103         pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH);
 104
 105         PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
 106         PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 107         PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
 108         PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 109         PKSR = 0xffffffff; // clear
 110
 111         /* nRESET_OUT Disable */
 112         PSLR |= PSLR_SL_ROD;
 113
 114         /* Clear reset status */
 115         RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
 116
 117         /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
 118         PCFR = PCFR_GPR_EN | PCFR_OPDE;
 119 }
 120
 121 static void spitz_postsuspend(void)
 122 {
 123         pxa_gpio_mode(GPIO18_RDY_MD);
 124         pxa_gpio_mode(10 | GPIO_IN);
 125 }
 126
 127 static int spitz_should_wakeup(unsigned int resume_on_alarm)
 128 {
 129         int is_resume = 0;
 130         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 131
 132         if (spitz_last_ac_status != acin) {
 133                 if (acin) {
 134                         /* charge on */
 135                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 136                         dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
 137                 } else {
 138                         /* charge off */
 139                         dev_dbg(sharpsl_pm.dev, "AC Removed\n");
 140                         sharpsl_pm_led(SHARPSL_LED_OFF);
 141                         sharpsl_pm.machinfo->charge(0);
 142                         sharpsl_pm.charge_mode = CHRG_OFF;
 143                 }
 144                 spitz_last_ac_status = acin;
 145                 /* Return to suspend as this must be what we were woken for */
 146                 return 0;
 147         }
 148
 149         if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
 150                 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
 151
 152         if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
 153                 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
 154
 155         if (resume_on_alarm && (PEDR & PWER_RTC))
 156                 is_resume |= PWER_RTC;
 157
 158         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
 159         return is_resume;
 160 }
 161
 162 static unsigned long spitz_charger_wakeup(void)
 163 {
 164         return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
 165 }
 166
 167 unsigned long spitzpm_read_devdata(int type)
 168 {
 169         switch(type) {
 170         case SHARPSL_STATUS_ACIN:
 171                 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0);
 172         case SHARPSL_STATUS_LOCK:
 173                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
 174         case SHARPSL_STATUS_CHRGFULL:
 175                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
 176         case SHARPSL_STATUS_FATAL:
 177                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
 178         case SHARPSL_ACIN_VOLT:
 179                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 180         case SHARPSL_BATT_TEMP:
 181                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 182         case SHARPSL_BATT_VOLT:
 183         default:
 184                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 185         }
 186 }
 187
 188 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
 189         .init             = spitz_charger_init,
 190         .exit             = sharpsl_pm_pxa_remove,
 191         .gpio_batlock     = SPITZ_GPIO_BAT_COVER,
 192         .gpio_acin        = SPITZ_GPIO_AC_IN,
 193         .gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
 194         .gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
 195         .discharge        = spitz_discharge,
 196         .discharge1       = spitz_discharge1,
 197         .charge           = spitz_charge,
 198         .measure_temp     = spitz_measure_temp,
 199         .presuspend       = spitz_presuspend,
 200         .postsuspend      = spitz_postsuspend,
 201         .read_devdata     = spitzpm_read_devdata,
 202         .charger_wakeup   = spitz_charger_wakeup,
 203         .should_wakeup    = spitz_should_wakeup,
 204         .bat_levels       = 40,
 205         .bat_levels_noac  = spitz_battery_levels_noac,
 206         .bat_levels_acin  = spitz_battery_levels_acin,
 207         .status_high_acin = 188,
 208         .status_low_acin  = 178,
 209         .status_high_noac = 185,
 210         .status_low_noac  = 175,
 211 };
 212
 213 static struct platform_device *spitzpm_device;
 214
 215 static int __devinit spitzpm_init(void)
 216 {
 217         int ret;
 218
 219         spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
 220         if (!spitzpm_device)
 221                 return -ENOMEM;
 222
 223         spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
 224         ret = platform_device_add(spitzpm_device);
 225
 226         if (ret)
 227                 platform_device_put(spitzpm_device);
 228
 229         return ret;
 230 }
 231
 232 static void spitzpm_exit(void)
 233 {
 234         platform_device_unregister(spitzpm_device);
 235 }
 236
 237 module_init(spitzpm_init);
 238 module_exit(spitzpm_exit);