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/gpio.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/apm-emulation.h>
  21
  22 #include <asm/irq.h>
  23 #include <asm/mach-types.h>
  24 #include <mach/hardware.h>
  25
  26 #include <mach/spitz.h>
  27 #include <mach/pxa27x.h>
  28 #include <mach/sharpsl_pm.h>
  29
  30 #include "generic.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 struct gpio spitz_charger_gpios[] = {
  42         { SPITZ_GPIO_KEY_INT,   GPIOF_IN, "Keyboard Interrupt" },
  43         { SPITZ_GPIO_SYNC,      GPIOF_IN, "Sync" },
  44         { SPITZ_GPIO_AC_IN,     GPIOF_IN, "Charger Detection" },
  45         { SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
  46         { SPITZ_GPIO_JK_B,        GPIOF_OUT_INIT_LOW, "JK B" },
  47         { SPITZ_GPIO_CHRG_ON,     GPIOF_OUT_INIT_LOW, "Charger On" },
  48 };
  49
  50 static void spitz_charger_init(void)
  51 {
  52         gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios));
  53 }
  54
  55 static void spitz_measure_temp(int on)
  56 {
  57         gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
  58 }
  59
  60 static void spitz_charge(int on)
  61 {
  62         if (on) {
  63                 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
  64                         gpio_set_value(SPITZ_GPIO_JK_B, 1);
  65                         gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
  66                 } else {
  67                         gpio_set_value(SPITZ_GPIO_JK_B, 0);
  68                         gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
  69                 }
  70         } else {
  71                 gpio_set_value(SPITZ_GPIO_JK_B, 0);
  72                 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
  73         }
  74 }
  75
  76 static void spitz_discharge(int on)
  77 {
  78         gpio_set_value(SPITZ_GPIO_JK_A, on);
  79 }
  80
  81 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
  82    on the power bus which the green led on spitz provides */
  83 static void spitz_discharge1(int on)
  84 {
  85         gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
  86 }
  87
  88 static unsigned long gpio18_config[] = {
  89         GPIO18_RDY,
  90         GPIO18_GPIO,
  91 };
  92
  93 static void spitz_presuspend(void)
  94 {
  95         spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
  96
  97         /* GPIO Sleep Register */
  98         PGSR0 = 0x00144018;
  99         PGSR1 = 0x00EF0000;
 100         if (machine_is_akita()) {
 101                 PGSR2 = 0x2121C000;
 102                 PGSR3 = 0x00600400;
 103         } else {
 104                 PGSR2 = 0x0121C000;
 105                 PGSR3 = 0x00600000;
 106         }
 107
 108         PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
 109         PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
 110         PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
 111         PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
 112         PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
 113
 114         pxa2xx_mfp_config(&gpio18_config[0], 1);
 115         gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown");
 116         gpio_free(18);
 117
 118         PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
 119         PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 120         PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
 121         PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 122         PKSR = 0xffffffff; /* clear */
 123
 124         /* nRESET_OUT Disable */
 125         PSLR |= PSLR_SL_ROD;
 126
 127         /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
 128         PCFR = PCFR_GPR_EN | PCFR_OPDE;
 129 }
 130
 131 static void spitz_postsuspend(void)
 132 {
 133         pxa2xx_mfp_config(&gpio18_config[1], 1);
 134 }
 135
 136 static int spitz_should_wakeup(unsigned int resume_on_alarm)
 137 {
 138         int is_resume = 0;
 139         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 140
 141         if (spitz_last_ac_status != acin) {
 142                 if (acin) {
 143                         /* charge on */
 144                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 145                         dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
 146                 } else {
 147                         /* charge off */
 148                         dev_dbg(sharpsl_pm.dev, "AC Removed\n");
 149                         sharpsl_pm_led(SHARPSL_LED_OFF);
 150                         sharpsl_pm.machinfo->charge(0);
 151                         sharpsl_pm.charge_mode = CHRG_OFF;
 152                 }
 153                 spitz_last_ac_status = acin;
 154                 /* Return to suspend as this must be what we were woken for */
 155                 return 0;
 156         }
 157
 158         if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
 159                 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
 160
 161         if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
 162                 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
 163
 164         if (resume_on_alarm && (PEDR & PWER_RTC))
 165                 is_resume |= PWER_RTC;
 166
 167         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume);
 168         return is_resume;
 169 }
 170
 171 static unsigned long spitz_charger_wakeup(void)
 172 {
 173         unsigned long ret;
 174         ret = (!gpio_get_value(SPITZ_GPIO_KEY_INT)
 175                 << GPIO_bit(SPITZ_GPIO_KEY_INT))
 176                 | (!gpio_get_value(SPITZ_GPIO_SYNC)
 177                 << GPIO_bit(SPITZ_GPIO_SYNC));
 178         return ret;
 179 }
 180
 181 unsigned long spitzpm_read_devdata(int type)
 182 {
 183         switch (type) {
 184         case SHARPSL_STATUS_ACIN:
 185                 return !gpio_get_value(SPITZ_GPIO_AC_IN);
 186         case SHARPSL_STATUS_LOCK:
 187                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
 188         case SHARPSL_STATUS_CHRGFULL:
 189                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
 190         case SHARPSL_STATUS_FATAL:
 191                 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
 192         case SHARPSL_ACIN_VOLT:
 193                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 194         case SHARPSL_BATT_TEMP:
 195                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 196         case SHARPSL_BATT_VOLT:
 197         default:
 198                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 199         }
 200 }
 201
 202 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
 203         .init             = spitz_charger_init,
 204         .exit             = NULL,
 205         .gpio_batlock     = SPITZ_GPIO_BAT_COVER,
 206         .gpio_acin        = SPITZ_GPIO_AC_IN,
 207         .gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
 208         .batfull_irq      = 1,
 209         .gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
 210         .discharge        = spitz_discharge,
 211         .discharge1       = spitz_discharge1,
 212         .charge           = spitz_charge,
 213         .measure_temp     = spitz_measure_temp,
 214         .presuspend       = spitz_presuspend,
 215         .postsuspend      = spitz_postsuspend,
 216         .read_devdata     = spitzpm_read_devdata,
 217         .charger_wakeup   = spitz_charger_wakeup,
 218         .should_wakeup    = spitz_should_wakeup,
 219 #if defined(CONFIG_LCD_CORGI)
 220         .backlight_limit = corgi_lcd_limit_intensity,
 221 #endif
 222         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 223         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 224         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 225         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 226         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 227         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 228         .bat_levels       = 40,
 229         .bat_levels_noac  = sharpsl_battery_levels_noac,
 230         .bat_levels_acin  = sharpsl_battery_levels_acin,
 231         .status_high_acin = 188,
 232         .status_low_acin  = 178,
 233         .status_high_noac = 185,
 234         .status_low_noac  = 175,
 235 };
 236
 237 static struct platform_device *spitzpm_device;
 238
 239 static int __devinit spitzpm_init(void)
 240 {
 241         int ret;
 242
 243         if (!machine_is_spitz() && !machine_is_akita()
 244                         && !machine_is_borzoi())
 245                 return -ENODEV;
 246
 247         spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
 248         if (!spitzpm_device)
 249                 return -ENOMEM;
 250
 251         spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
 252         ret = platform_device_add(spitzpm_device);
 253
 254         if (ret)
 255                 platform_device_put(spitzpm_device);
 256
 257         return ret;
 258 }
 259
 260 static void spitzpm_exit(void)
 261 {
 262         platform_device_unregister(spitzpm_device);
 263 }
 264
 265 module_init(spitzpm_init);
 266 module_exit(spitzpm_exit);