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_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
  45         { SPITZ_GPIO_JK_B,        GPIOF_OUT_INIT_LOW, "JK B" },
  46         { SPITZ_GPIO_CHRG_ON,     GPIOF_OUT_INIT_LOW, "Charger On" },
  47 };
  48
  49 static void spitz_charger_init(void)
  50 {
  51         gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios));
  52 }
  53
  54 static void spitz_measure_temp(int on)
  55 {
  56         gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
  57 }
  58
  59 static void spitz_charge(int on)
  60 {
  61         if (on) {
  62                 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
  63                         gpio_set_value(SPITZ_GPIO_JK_B, 1);
  64                         gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
  65                 } else {
  66                         gpio_set_value(SPITZ_GPIO_JK_B, 0);
  67                         gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
  68                 }
  69         } else {
  70                 gpio_set_value(SPITZ_GPIO_JK_B, 0);
  71                 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
  72         }
  73 }
  74
  75 static void spitz_discharge(int on)
  76 {
  77         gpio_set_value(SPITZ_GPIO_JK_A, on);
  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         gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
  85 }
  86
  87 static unsigned long gpio18_config[] = {
  88         GPIO18_RDY,
  89         GPIO18_GPIO,
  90 };
  91
  92 static void spitz_presuspend(void)
  93 {
  94         spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
  95
  96         /* GPIO Sleep Register */
  97         PGSR0 = 0x00144018;
  98         PGSR1 = 0x00EF0000;
  99         if (machine_is_akita()) {
 100                 PGSR2 = 0x2121C000;
 101                 PGSR3 = 0x00600400;
 102         } else {
 103                 PGSR2 = 0x0121C000;
 104                 PGSR3 = 0x00600000;
 105         }
 106
 107         PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
 108         PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
 109         PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
 110         PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
 111         PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
 112
 113         pxa2xx_mfp_config(&gpio18_config[0], 1);
 114         gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown");
 115         gpio_free(18);
 116
 117         PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
 118         PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 119         PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
 120         PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 121         PKSR = 0xffffffff; /* clear */
 122
 123         /* nRESET_OUT Disable */
 124         PSLR |= PSLR_SL_ROD;
 125
 126         /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
 127         PCFR = PCFR_GPR_EN | PCFR_OPDE;
 128 }
 129
 130 static void spitz_postsuspend(void)
 131 {
 132         pxa2xx_mfp_config(&gpio18_config[1], 1);
 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 gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
 182         case SHARPSL_STATUS_CHRGFULL:
 183                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
 184         case SHARPSL_STATUS_FATAL:
 185                 return gpio_get_value(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             = NULL,
 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 #if defined(CONFIG_LCD_CORGI)
 214         .backlight_limit = corgi_lcd_limit_intensity,
 215 #endif
 216         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 217         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 218         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 219         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 220         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 221         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 222         .bat_levels       = 40,
 223         .bat_levels_noac  = sharpsl_battery_levels_noac,
 224         .bat_levels_acin  = sharpsl_battery_levels_acin,
 225         .status_high_acin = 188,
 226         .status_low_acin  = 178,
 227         .status_high_noac = 185,
 228         .status_low_noac  = 175,
 229 };
 230
 231 static struct platform_device *spitzpm_device;
 232
 233 static int __devinit spitzpm_init(void)
 234 {
 235         int ret;
 236
 237         if (!machine_is_spitz() && !machine_is_akita()
 238                         && !machine_is_borzoi())
 239                 return -ENODEV;
 240
 241         spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
 242         if (!spitzpm_device)
 243                 return -ENOMEM;
 244
 245         spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
 246         ret = platform_device_add(spitzpm_device);
 247
 248         if (ret)
 249                 platform_device_put(spitzpm_device);
 250
 251         return ret;
 252 }
 253
 254 static void spitzpm_exit(void)
 255 {
 256         platform_device_unregister(spitzpm_device);
 257 }
 258
 259 module_init(spitzpm_init);
 260 module_exit(spitzpm_exit);