arch/arm/mach-pxa/spitz_pm.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Battery and Power Management code for the Sharp SL-Cxx00
   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
  19 #include <asm/irq.h>
  20 #include <asm/mach-types.h>
  21
  22 #include "spitz.h"
  23 #include "pxa27x.h"
  24 #include "sharpsl_pm.h"
  25
  26 #include "generic.h"
  27
  28 #define SHARPSL_CHARGE_ON_VOLT         0x99  /* 2.9V */
  29 #define SHARPSL_CHARGE_ON_TEMP         0xe0  /* 2.9V */
  30 #define SHARPSL_CHARGE_ON_ACIN_HIGH    0x9b  /* 6V */
  31 #define SHARPSL_CHARGE_ON_ACIN_LOW     0x34  /* 2V */
  32 #define SHARPSL_FATAL_ACIN_VOLT        182   /* 3.45V */
  33 #define SHARPSL_FATAL_NOACIN_VOLT      170   /* 3.40V */
  34
  35 static int spitz_last_ac_status;
  36
  37 static struct gpio spitz_charger_gpios[] = {
  38         { SPITZ_GPIO_KEY_INT,   GPIOF_IN, "Keyboard Interrupt" },
  39         { SPITZ_GPIO_SYNC,      GPIOF_IN, "Sync" },
  40         { SPITZ_GPIO_AC_IN,     GPIOF_IN, "Charger Detection" },
  41         { SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
  42         { SPITZ_GPIO_JK_B,        GPIOF_OUT_INIT_LOW, "JK B" },
  43         { SPITZ_GPIO_CHRG_ON,     GPIOF_OUT_INIT_LOW, "Charger On" },
  44 };
  45
  46 static void spitz_charger_init(void)
  47 {
  48         gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios));
  49 }
  50
  51 static void spitz_measure_temp(int on)
  52 {
  53         gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
  54 }
  55
  56 static void spitz_charge(int on)
  57 {
  58         if (on) {
  59                 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
  60                         gpio_set_value(SPITZ_GPIO_JK_B, 1);
  61                         gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
  62                 } else {
  63                         gpio_set_value(SPITZ_GPIO_JK_B, 0);
  64                         gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
  65                 }
  66         } else {
  67                 gpio_set_value(SPITZ_GPIO_JK_B, 0);
  68                 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
  69         }
  70 }
  71
  72 static void spitz_discharge(int on)
  73 {
  74         gpio_set_value(SPITZ_GPIO_JK_A, on);
  75 }
  76
  77 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
  78    on the power bus which the green led on spitz provides */
  79 static void spitz_discharge1(int on)
  80 {
  81         gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
  82 }
  83
  84 static unsigned long gpio18_config = GPIO18_GPIO;
  85
  86 static void spitz_presuspend(void)
  87 {
  88         spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
  89
  90         /* GPIO Sleep Register */
  91         PGSR0 = 0x00144018;
  92         PGSR1 = 0x00EF0000;
  93         if (machine_is_akita()) {
  94                 PGSR2 = 0x2121C000;
  95                 PGSR3 = 0x00600400;
  96         } else {
  97                 PGSR2 = 0x0121C000;
  98                 PGSR3 = 0x00600000;
  99         }
 100
 101         PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
 102         PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
 103         PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
 104         PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
 105         PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
 106
 107         pxa2xx_mfp_config(&gpio18_config, 1);
 108         gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown");
 109         gpio_free(18);
 110
 111         PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
 112         PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 113         PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
 114         PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 115         PKSR = 0xffffffff; /* clear */
 116
 117         /* nRESET_OUT Disable */
 118         PSLR |= PSLR_SL_ROD;
 119
 120         /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
 121         PCFR = PCFR_GPR_EN | PCFR_OPDE;
 122 }
 123
 124 static void spitz_postsuspend(void)
 125 {
 126 }
 127
 128 static int spitz_should_wakeup(unsigned int resume_on_alarm)
 129 {
 130         int is_resume = 0;
 131         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 132
 133         if (spitz_last_ac_status != acin) {
 134                 if (acin) {
 135                         /* charge on */
 136                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 137                         dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
 138                 } else {
 139                         /* charge off */
 140                         dev_dbg(sharpsl_pm.dev, "AC Removed\n");
 141                         sharpsl_pm_led(SHARPSL_LED_OFF);
 142                         sharpsl_pm.machinfo->charge(0);
 143                         sharpsl_pm.charge_mode = CHRG_OFF;
 144                 }
 145                 spitz_last_ac_status = acin;
 146                 /* Return to suspend as this must be what we were woken for */
 147                 return 0;
 148         }
 149
 150         if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
 151                 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
 152
 153         if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
 154                 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
 155
 156         if (resume_on_alarm && (PEDR & PWER_RTC))
 157                 is_resume |= PWER_RTC;
 158
 159         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume);
 160         return is_resume;
 161 }
 162
 163 static bool spitz_charger_wakeup(void)
 164 {
 165         return !gpio_get_value(SPITZ_GPIO_KEY_INT) ||
 166                 gpio_get_value(SPITZ_GPIO_SYNC);
 167 }
 168
 169 static unsigned long spitzpm_read_devdata(int type)
 170 {
 171         switch (type) {
 172         case SHARPSL_STATUS_ACIN:
 173                 return !gpio_get_value(SPITZ_GPIO_AC_IN);
 174         case SHARPSL_STATUS_LOCK:
 175                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
 176         case SHARPSL_STATUS_CHRGFULL:
 177                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
 178         case SHARPSL_STATUS_FATAL:
 179                 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
 180         case SHARPSL_ACIN_VOLT:
 181                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 182         case SHARPSL_BATT_TEMP:
 183                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 184         case SHARPSL_BATT_VOLT:
 185         default:
 186                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 187         }
 188 }
 189
 190 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
 191         .init             = spitz_charger_init,
 192         .exit             = NULL,
 193         .gpio_batlock     = SPITZ_GPIO_BAT_COVER,
 194         .gpio_acin        = SPITZ_GPIO_AC_IN,
 195         .gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
 196         .batfull_irq      = 1,
 197         .gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
 198         .discharge        = spitz_discharge,
 199         .discharge1       = spitz_discharge1,
 200         .charge           = spitz_charge,
 201         .measure_temp     = spitz_measure_temp,
 202         .presuspend       = spitz_presuspend,
 203         .postsuspend      = spitz_postsuspend,
 204         .read_devdata     = spitzpm_read_devdata,
 205         .charger_wakeup   = spitz_charger_wakeup,
 206         .should_wakeup    = spitz_should_wakeup,
 207 #if defined(CONFIG_LCD_CORGI)
 208         .backlight_limit = corgi_lcd_limit_intensity,
 209 #endif
 210         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 211         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 212         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 213         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 214         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 215         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 216         .bat_levels       = 40,
 217         .bat_levels_noac  = sharpsl_battery_levels_noac,
 218         .bat_levels_acin  = sharpsl_battery_levels_acin,
 219         .status_high_acin = 188,
 220         .status_low_acin  = 178,
 221         .status_high_noac = 185,
 222         .status_low_noac  = 175,
 223 };
 224
 225 static struct platform_device *spitzpm_device;
 226
 227 static int spitzpm_init(void)
 228 {
 229         int ret;
 230
 231         if (!machine_is_spitz() && !machine_is_akita()
 232                         && !machine_is_borzoi())
 233                 return -ENODEV;
 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);