arch/arm/mach-pxa/corgi_pm.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Battery and Power Management code for the Sharp SL-C7xx
   4  *
   5  * Copyright (c) 2005 Richard Purdie
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/stat.h>
  10 #include <linux/init.h>
  11 #include <linux/kernel.h>
  12 #include <linux/delay.h>
  13 #include <linux/gpio.h>
  14 #include <linux/gpio-pxa.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/apm-emulation.h>
  18 #include <linux/io.h>
  19
  20 #include <asm/irq.h>
  21 #include <asm/mach-types.h>
  22 #include <mach/hardware.h>
  23
  24 #include <mach/corgi.h>
  25 #include <mach/pxa2xx-regs.h>
  26 #include "sharpsl_pm.h"
  27
  28 #include "generic.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 struct gpio charger_gpios[] = {
  38         { CORGI_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
  39         { CORGI_GPIO_CHRG_ON,     GPIOF_OUT_INIT_LOW, "Charger On" },
  40         { CORGI_GPIO_CHRG_UKN,    GPIOF_OUT_INIT_LOW, "Charger Unknown" },
  41         { CORGI_GPIO_AC_IN,       GPIOF_IN, "Charger Detection" },
  42         { CORGI_GPIO_KEY_INT,     GPIOF_IN, "Key Interrupt" },
  43         { CORGI_GPIO_WAKEUP,      GPIOF_IN, "System wakeup notification" },
  44 };
  45
  46 static void corgi_charger_init(void)
  47 {
  48         gpio_request_array(ARRAY_AND_SIZE(charger_gpios));
  49 }
  50
  51 static void corgi_measure_temp(int on)
  52 {
  53         gpio_set_value(CORGI_GPIO_ADC_TEMP_ON, on);
  54 }
  55
  56 static void corgi_charge(int on)
  57 {
  58         if (on) {
  59                 if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
  60                         gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
  61                         gpio_set_value(CORGI_GPIO_CHRG_UKN, 1);
  62                 } else {
  63                         gpio_set_value(CORGI_GPIO_CHRG_ON, 1);
  64                         gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
  65                 }
  66         } else {
  67                 gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
  68                 gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
  69         }
  70 }
  71
  72 static void corgi_discharge(int on)
  73 {
  74         gpio_set_value(CORGI_GPIO_DISCHARGE_ON, on);
  75 }
  76
  77 static void corgi_presuspend(void)
  78 {
  79 }
  80
  81 static void corgi_postsuspend(void)
  82 {
  83 }
  84
  85 /*
  86  * Check what brought us out of the suspend.
  87  * Return: 0 to sleep, otherwise wake
  88  */
  89 static int corgi_should_wakeup(unsigned int resume_on_alarm)
  90 {
  91         int is_resume = 0;
  92
  93         dev_dbg(sharpsl_pm.dev, "PEDR = %x, GPIO_AC_IN = %d, "
  94                 "GPIO_CHRG_FULL = %d, GPIO_KEY_INT = %d, GPIO_WAKEUP = %d\n",
  95                 PEDR, gpio_get_value(CORGI_GPIO_AC_IN),
  96                 gpio_get_value(CORGI_GPIO_CHRG_FULL),
  97                 gpio_get_value(CORGI_GPIO_KEY_INT),
  98                 gpio_get_value(CORGI_GPIO_WAKEUP));
  99
 100         if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
 101                 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
 102                         /* charge on */
 103                         dev_dbg(sharpsl_pm.dev, "ac insert\n");
 104                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 105                 } else {
 106                         /* charge off */
 107                         dev_dbg(sharpsl_pm.dev, "ac remove\n");
 108                         sharpsl_pm_led(SHARPSL_LED_OFF);
 109                         sharpsl_pm.machinfo->charge(0);
 110                         sharpsl_pm.charge_mode = CHRG_OFF;
 111                 }
 112         }
 113
 114         if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
 115                 dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
 116
 117         if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
 118                 is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
 119
 120         if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
 121                 is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
 122
 123         if (resume_on_alarm && (PEDR & PWER_RTC))
 124                 is_resume |= PWER_RTC;
 125
 126         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
 127         return is_resume;
 128 }
 129
 130 static bool corgi_charger_wakeup(void)
 131 {
 132         return !gpio_get_value(CORGI_GPIO_AC_IN) ||
 133                 !gpio_get_value(CORGI_GPIO_KEY_INT) ||
 134                 !gpio_get_value(CORGI_GPIO_WAKEUP);
 135 }
 136
 137 unsigned long corgipm_read_devdata(int type)
 138 {
 139         switch(type) {
 140         case SHARPSL_STATUS_ACIN:
 141                 return !gpio_get_value(CORGI_GPIO_AC_IN);
 142         case SHARPSL_STATUS_LOCK:
 143                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
 144         case SHARPSL_STATUS_CHRGFULL:
 145                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
 146         case SHARPSL_STATUS_FATAL:
 147                 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
 148         case SHARPSL_ACIN_VOLT:
 149                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 150         case SHARPSL_BATT_TEMP:
 151                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 152         case SHARPSL_BATT_VOLT:
 153         default:
 154                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 155         }
 156 }
 157
 158 static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
 159         .init            = corgi_charger_init,
 160         .exit            = NULL,
 161         .gpio_batlock    = CORGI_GPIO_BAT_COVER,
 162         .gpio_acin       = CORGI_GPIO_AC_IN,
 163         .gpio_batfull    = CORGI_GPIO_CHRG_FULL,
 164         .discharge       = corgi_discharge,
 165         .charge          = corgi_charge,
 166         .measure_temp    = corgi_measure_temp,
 167         .presuspend      = corgi_presuspend,
 168         .postsuspend     = corgi_postsuspend,
 169         .read_devdata    = corgipm_read_devdata,
 170         .charger_wakeup  = corgi_charger_wakeup,
 171         .should_wakeup   = corgi_should_wakeup,
 172 #if defined(CONFIG_LCD_CORGI)
 173         .backlight_limit = corgi_lcd_limit_intensity,
 174 #endif
 175         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 176         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 177         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 178         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 179         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 180         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 181         .bat_levels       = 40,
 182         .bat_levels_noac  = sharpsl_battery_levels_noac,
 183         .bat_levels_acin  = sharpsl_battery_levels_acin,
 184         .status_high_acin = 188,
 185         .status_low_acin  = 178,
 186         .status_high_noac = 185,
 187         .status_low_noac  = 175,
 188 };
 189
 190 static struct platform_device *corgipm_device;
 191
 192 static int corgipm_init(void)
 193 {
 194         int ret;
 195
 196         if (!machine_is_corgi() && !machine_is_shepherd()
 197                         && !machine_is_husky())
 198                 return -ENODEV;
 199
 200         corgipm_device = platform_device_alloc("sharpsl-pm", -1);
 201         if (!corgipm_device)
 202                 return -ENOMEM;
 203
 204         if (!machine_is_corgi())
 205             corgi_pm_machinfo.batfull_irq = 1;
 206
 207         corgipm_device->dev.platform_data = &corgi_pm_machinfo;
 208         ret = platform_device_add(corgipm_device);
 209
 210         if (ret)
 211                 platform_device_put(corgipm_device);
 212
 213         return ret;
 214 }
 215
 216 static void corgipm_exit(void)
 217 {
 218         platform_device_unregister(corgipm_device);
 219 }
 220
 221 module_init(corgipm_init);
 222 module_exit(corgipm_exit);