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 <asm/hardware.h>
  24 #include <asm/hardware/scoop.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 #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         if (on)
  50                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
  51         else
  52                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
  53 }
  54
  55 static void spitz_charge(int on)
  56 {
  57         if (on) {
  58                 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
  59                         set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
  60                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
  61                 } else {
  62                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
  63                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
  64                 }
  65         } else {
  66                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
  67                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
  68         }
  69 }
  70
  71 static void spitz_discharge(int on)
  72 {
  73         if (on)
  74                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
  75         else
  76                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
  77 }
  78
  79 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
  80    on the power bus which the green led on spitz provides */
  81 static void spitz_discharge1(int on)
  82 {
  83         if (on)
  84                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
  85         else
  86                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
  87 }
  88
  89 static void spitz_presuspend(void)
  90 {
  91         spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
  92
  93         /* GPIO Sleep Register */
  94         PGSR0 = 0x00144018;
  95         PGSR1 = 0x00EF0000;
  96         if (machine_is_akita()) {
  97                 PGSR2 = 0x2121C000;
  98                 PGSR3 = 0x00600400;
  99         } else {
 100                 PGSR2 = 0x0121C000;
 101                 PGSR3 = 0x00600000;
 102         }
 103
 104         PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
 105         PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
 106         PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
 107         PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
 108         PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
 109
 110         pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH);
 111
 112         PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
 113         PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 114         PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
 115         PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 116         PKSR = 0xffffffff; // clear
 117
 118         /* nRESET_OUT Disable */
 119         PSLR |= PSLR_SL_ROD;
 120
 121         /* Clear reset status */
 122         RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
 123
 124         /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
 125         PCFR = PCFR_GPR_EN | PCFR_OPDE;
 126 }
 127
 128 static void spitz_postsuspend(void)
 129 {
 130         pxa_gpio_mode(GPIO18_RDY_MD);
 131         pxa_gpio_mode(10 | GPIO_IN);
 132 }
 133
 134 static int spitz_should_wakeup(unsigned int resume_on_alarm)
 135 {
 136         int is_resume = 0;
 137         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 138
 139         if (spitz_last_ac_status != acin) {
 140                 if (acin) {
 141                         /* charge on */
 142                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 143                         dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
 144                 } else {
 145                         /* charge off */
 146                         dev_dbg(sharpsl_pm.dev, "AC Removed\n");
 147                         sharpsl_pm_led(SHARPSL_LED_OFF);
 148                         sharpsl_pm.machinfo->charge(0);
 149                         sharpsl_pm.charge_mode = CHRG_OFF;
 150                 }
 151                 spitz_last_ac_status = acin;
 152                 /* Return to suspend as this must be what we were woken for */
 153                 return 0;
 154         }
 155
 156         if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
 157                 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
 158
 159         if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
 160                 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
 161
 162         if (resume_on_alarm && (PEDR & PWER_RTC))
 163                 is_resume |= PWER_RTC;
 164
 165         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
 166         return is_resume;
 167 }
 168
 169 static unsigned long spitz_charger_wakeup(void)
 170 {
 171         return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
 172 }
 173
 174 unsigned long spitzpm_read_devdata(int type)
 175 {
 176         switch(type) {
 177         case SHARPSL_STATUS_ACIN:
 178                 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0);
 179         case SHARPSL_STATUS_LOCK:
 180                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
 181         case SHARPSL_STATUS_CHRGFULL:
 182                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
 183         case SHARPSL_STATUS_FATAL:
 184                 return READ_GPIO_BIT(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             = sharpsl_pm_pxa_remove,
 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         .backlight_limit  = corgibl_limit_intensity,
 213         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 214         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 215         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 216         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 217         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 218         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 219         .bat_levels       = 40,
 220         .bat_levels_noac  = spitz_battery_levels_noac,
 221         .bat_levels_acin  = spitz_battery_levels_acin,
 222         .status_high_acin = 188,
 223         .status_low_acin  = 178,
 224         .status_high_noac = 185,
 225         .status_low_noac  = 175,
 226 };
 227
 228 static struct platform_device *spitzpm_device;
 229
 230 static int __devinit spitzpm_init(void)
 231 {
 232         int ret;
 233
 234         spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
 235         if (!spitzpm_device)
 236                 return -ENOMEM;
 237
 238         spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
 239         ret = platform_device_add(spitzpm_device);
 240
 241         if (ret)
 242                 platform_device_put(spitzpm_device);
 243
 244         return ret;
 245 }
 246
 247 static void spitzpm_exit(void)
 248 {
 249         platform_device_unregister(spitzpm_device);
 250 }
 251
 252 module_init(spitzpm_init);
 253 module_exit(spitzpm_exit);