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 <asm/arch/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         if (on)
  51                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
  52         else
  53                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
  54 }
  55
  56 static void spitz_charge(int on)
  57 {
  58         if (on) {
  59                 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
  60                         set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
  61                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
  62                 } else {
  63                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
  64                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
  65                 }
  66         } else {
  67                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
  68                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
  69         }
  70 }
  71
  72 static void spitz_discharge(int on)
  73 {
  74         if (on)
  75                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
  76         else
  77                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
  78 }
  79
  80 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
  81    on the power bus which the green led on spitz provides */
  82 static void spitz_discharge1(int on)
  83 {
  84         if (on)
  85                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
  86         else
  87                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
  88 }
  89
  90 static void spitz_presuspend(void)
  91 {
  92         spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
  93
  94         /* GPIO Sleep Register */
  95         PGSR0 = 0x00144018;
  96         PGSR1 = 0x00EF0000;
  97         if (machine_is_akita()) {
  98                 PGSR2 = 0x2121C000;
  99                 PGSR3 = 0x00600400;
 100         } else {
 101                 PGSR2 = 0x0121C000;
 102                 PGSR3 = 0x00600000;
 103         }
 104
 105         PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
 106         PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
 107         PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
 108         PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
 109         PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
 110
 111         pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH);
 112
 113         PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
 114         PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 115         PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
 116         PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 117         PKSR = 0xffffffff; // clear
 118
 119         /* nRESET_OUT Disable */
 120         PSLR |= PSLR_SL_ROD;
 121
 122         /* Clear reset status */
 123         RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
 124
 125         /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
 126         PCFR = PCFR_GPR_EN | PCFR_OPDE;
 127 }
 128
 129 static void spitz_postsuspend(void)
 130 {
 131         pxa_gpio_mode(GPIO18_RDY_MD);
 132         pxa_gpio_mode(10 | GPIO_IN);
 133 }
 134
 135 static int spitz_should_wakeup(unsigned int resume_on_alarm)
 136 {
 137         int is_resume = 0;
 138         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 139
 140         if (spitz_last_ac_status != acin) {
 141                 if (acin) {
 142                         /* charge on */
 143                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 144                         dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
 145                 } else {
 146                         /* charge off */
 147                         dev_dbg(sharpsl_pm.dev, "AC Removed\n");
 148                         sharpsl_pm_led(SHARPSL_LED_OFF);
 149                         sharpsl_pm.machinfo->charge(0);
 150                         sharpsl_pm.charge_mode = CHRG_OFF;
 151                 }
 152                 spitz_last_ac_status = acin;
 153                 /* Return to suspend as this must be what we were woken for */
 154                 return 0;
 155         }
 156
 157         if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
 158                 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
 159
 160         if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
 161                 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
 162
 163         if (resume_on_alarm && (PEDR & PWER_RTC))
 164                 is_resume |= PWER_RTC;
 165
 166         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
 167         return is_resume;
 168 }
 169
 170 static unsigned long spitz_charger_wakeup(void)
 171 {
 172         return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
 173 }
 174
 175 unsigned long spitzpm_read_devdata(int type)
 176 {
 177         switch(type) {
 178         case SHARPSL_STATUS_ACIN:
 179                 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0);
 180         case SHARPSL_STATUS_LOCK:
 181                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
 182         case SHARPSL_STATUS_CHRGFULL:
 183                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
 184         case SHARPSL_STATUS_FATAL:
 185                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
 186         case SHARPSL_ACIN_VOLT:
 187                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 188         case SHARPSL_BATT_TEMP:
 189                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 190         case SHARPSL_BATT_VOLT:
 191         default:
 192                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 193         }
 194 }
 195
 196 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
 197         .init             = spitz_charger_init,
 198         .exit             = sharpsl_pm_pxa_remove,
 199         .gpio_batlock     = SPITZ_GPIO_BAT_COVER,
 200         .gpio_acin        = SPITZ_GPIO_AC_IN,
 201         .gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
 202         .batfull_irq      = 1,
 203         .gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
 204         .discharge        = spitz_discharge,
 205         .discharge1       = spitz_discharge1,
 206         .charge           = spitz_charge,
 207         .measure_temp     = spitz_measure_temp,
 208         .presuspend       = spitz_presuspend,
 209         .postsuspend      = spitz_postsuspend,
 210         .read_devdata     = spitzpm_read_devdata,
 211         .charger_wakeup   = spitz_charger_wakeup,
 212         .should_wakeup    = spitz_should_wakeup,
 213         .backlight_limit  = corgibl_limit_intensity,
 214         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 215         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 216         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 217         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 218         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 219         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 220         .bat_levels       = 40,
 221         .bat_levels_noac  = spitz_battery_levels_noac,
 222         .bat_levels_acin  = spitz_battery_levels_acin,
 223         .status_high_acin = 188,
 224         .status_low_acin  = 178,
 225         .status_high_noac = 185,
 226         .status_low_noac  = 175,
 227 };
 228
 229 static struct platform_device *spitzpm_device;
 230
 231 static int __devinit spitzpm_init(void)
 232 {
 233         int ret;
 234
 235         spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
 236         if (!spitzpm_device)
 237                 return -ENOMEM;
 238
 239         spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
 240         ret = platform_device_add(spitzpm_device);
 241
 242         if (ret)
 243                 platform_device_put(spitzpm_device);
 244
 245         return ret;
 246 }
 247
 248 static void spitzpm_exit(void)
 249 {
 250         platform_device_unregister(spitzpm_device);
 251 }
 252
 253 module_init(spitzpm_init);
 254 module_exit(spitzpm_exit);