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
  25 #include <asm/arch/sharpsl.h>
  26 #include <asm/arch/spitz.h>
  27 #include <asm/arch/pxa-regs.h>
  28 #include "sharpsl.h"
  29
  30 #define SHARPSL_CHARGE_ON_VOLT         0x99  /* 2.9V */
  31 #define SHARPSL_CHARGE_ON_TEMP         0xe0  /* 2.9V */
  32 #define SHARPSL_CHARGE_ON_ACIN_HIGH    0x9b  /* 6V */
  33 #define SHARPSL_CHARGE_ON_ACIN_LOW     0x34  /* 2V */
  34 #define SHARPSL_FATAL_ACIN_VOLT        182   /* 3.45V */
  35 #define SHARPSL_FATAL_NOACIN_VOLT      170   /* 3.40V */
  36
  37 static int spitz_last_ac_status;
  38
  39 static void spitz_charger_init(void)
  40 {
  41         pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN);
  42         pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
  43         sharpsl_pm_pxa_init();
  44 }
  45
  46 static void spitz_measure_temp(int on)
  47 {
  48         if (on)
  49                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
  50         else
  51                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
  52 }
  53
  54 static void spitz_charge(int on)
  55 {
  56         if (on) {
  57                 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
  58                         set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
  59                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
  60                 } else {
  61                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
  62                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
  63                 }
  64         } else {
  65                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
  66                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
  67         }
  68 }
  69
  70 static void spitz_discharge(int on)
  71 {
  72         if (on)
  73                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
  74         else
  75                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
  76 }
  77
  78 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
  79    on the power bus which the green led on spitz provides */
  80 static void spitz_discharge1(int on)
  81 {
  82         if (on)
  83                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
  84         else
  85                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
  86 }
  87
  88 static void spitz_presuspend(void)
  89 {
  90         spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
  91
  92         /* GPIO Sleep Register */
  93         PGSR0 = 0x00144018;
  94         PGSR1 = 0x00EF0000;
  95         if (machine_is_akita()) {
  96                 PGSR2 = 0x2121C000;
  97                 PGSR3 = 0x00600400;
  98         } else {
  99                 PGSR2 = 0x0121C000;
 100                 PGSR3 = 0x00600000;
 101         }
 102
 103         PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
 104         PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
 105         PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
 106         PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
 107         PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
 108
 109         pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH);
 110
 111         PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
 112         PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 113         PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
 114         PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 115         PKSR = 0xffffffff; // clear
 116
 117         /* nRESET_OUT Disable */
 118         PSLR |= PSLR_SL_ROD;
 119
 120         /* Clear reset status */
 121         RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
 122
 123         /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
 124         PCFR = PCFR_GPR_EN | PCFR_OPDE;
 125 }
 126
 127 static void spitz_postsuspend(void)
 128 {
 129         pxa_gpio_mode(GPIO18_RDY_MD);
 130         pxa_gpio_mode(10 | GPIO_IN);
 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 unsigned long spitz_charger_wakeup(void)
 169 {
 170         return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
 171 }
 172
 173 unsigned long spitzpm_read_devdata(int type)
 174 {
 175         switch(type) {
 176         case SHARPSL_STATUS_ACIN:
 177                 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0);
 178         case SHARPSL_STATUS_LOCK:
 179                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
 180         case SHARPSL_STATUS_CHRGFULL:
 181                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
 182         case SHARPSL_STATUS_FATAL:
 183                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
 184         case SHARPSL_ACIN_VOLT:
 185                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 186         case SHARPSL_BATT_TEMP:
 187                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 188         case SHARPSL_BATT_VOLT:
 189         default:
 190                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 191         }
 192 }
 193
 194 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
 195         .init             = spitz_charger_init,
 196         .exit             = sharpsl_pm_pxa_remove,
 197         .gpio_batlock     = SPITZ_GPIO_BAT_COVER,
 198         .gpio_acin        = SPITZ_GPIO_AC_IN,
 199         .gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
 200         .batfull_irq      = 1,
 201         .gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
 202         .discharge        = spitz_discharge,
 203         .discharge1       = spitz_discharge1,
 204         .charge           = spitz_charge,
 205         .measure_temp     = spitz_measure_temp,
 206         .presuspend       = spitz_presuspend,
 207         .postsuspend      = spitz_postsuspend,
 208         .read_devdata     = spitzpm_read_devdata,
 209         .charger_wakeup   = spitz_charger_wakeup,
 210         .should_wakeup    = spitz_should_wakeup,
 211         .backlight_limit  = corgibl_limit_intensity,
 212         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 213         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 214         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 215         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 216         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 217         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 218         .bat_levels       = 40,
 219         .bat_levels_noac  = spitz_battery_levels_noac,
 220         .bat_levels_acin  = spitz_battery_levels_acin,
 221         .status_high_acin = 188,
 222         .status_low_acin  = 178,
 223         .status_high_noac = 185,
 224         .status_low_noac  = 175,
 225 };
 226
 227 static struct platform_device *spitzpm_device;
 228
 229 static int __devinit spitzpm_init(void)
 230 {
 231         int ret;
 232
 233         spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
 234         if (!spitzpm_device)
 235                 return -ENOMEM;
 236
 237         spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
 238         ret = platform_device_add(spitzpm_device);
 239
 240         if (ret)
 241                 platform_device_put(spitzpm_device);
 242
 243         return ret;
 244 }
 245
 246 static void spitzpm_exit(void)
 247 {
 248         platform_device_unregister(spitzpm_device);
 249 }
 250
 251 module_init(spitzpm_init);
 252 module_exit(spitzpm_exit);