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 #include <linux/spi/corgi_lcd.h>
  19
  20 #include <asm/irq.h>
  21 #include <asm/mach-types.h>
  22
  23 #include "spitz.h"
  24 #include "pxa27x.h"
  25 #include "sharpsl_pm.h"
  26
  27 #include "generic.h"
  28
  29 #define SHARPSL_CHARGE_ON_VOLT         0x99  /* 2.9V */
  30 #define SHARPSL_CHARGE_ON_TEMP         0xe0  /* 2.9V */
  31 #define SHARPSL_CHARGE_ON_ACIN_HIGH    0x9b  /* 6V */
  32 #define SHARPSL_CHARGE_ON_ACIN_LOW     0x34  /* 2V */
  33 #define SHARPSL_FATAL_ACIN_VOLT        182   /* 3.45V */
  34 #define SHARPSL_FATAL_NOACIN_VOLT      170   /* 3.40V */
  35
  36 static int spitz_last_ac_status;
  37
  38 static void spitz_charger_init(void)
  39 {
  40         gpio_request(SPITZ_GPIO_KEY_INT, "Keyboard Interrupt");
  41         gpio_direction_input(SPITZ_GPIO_KEY_INT);
  42         gpio_request(SPITZ_GPIO_SYNC, "Sync");
  43         gpio_direction_input(SPITZ_GPIO_SYNC);
  44         gpio_request(SPITZ_GPIO_AC_IN, "Charger Detection");
  45         gpio_direction_input(SPITZ_GPIO_AC_IN);
  46         gpio_request(SPITZ_GPIO_ADC_TEMP_ON, "ADC Temp On");
  47         gpio_direction_output(SPITZ_GPIO_ADC_TEMP_ON, 0);
  48         gpio_request(SPITZ_GPIO_JK_B, "JK B");
  49         gpio_direction_output(SPITZ_GPIO_JK_B, 0);
  50         gpio_request(SPITZ_GPIO_CHRG_ON, "Charger On");
  51         gpio_direction_output(SPITZ_GPIO_CHRG_ON, 0);
  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 = GPIO18_GPIO;
  88
  89 static void spitz_presuspend(void)
  90 {
  91         spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
  92
  93         /* GPIO Sleep Register */
  94         PGSR0 = 0x00144018;
  95         PGSR1 = 0x00EF0000;
  96         if (machine_is_akita()) {
  97                 PGSR2 = 0x2121C000;
  98                 PGSR3 = 0x00600400;
  99         } else {
 100                 PGSR2 = 0x0121C000;
 101                 PGSR3 = 0x00600000;
 102         }
 103
 104         PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
 105         PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
 106         PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
 107         PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
 108         PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
 109
 110         pxa2xx_mfp_config(&gpio18_config, 1);
 111         gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown");
 112         gpio_free(18);
 113
 114         PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
 115         PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 116         PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
 117         PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 118         PKSR = 0xffffffff; /* clear */
 119
 120         /* nRESET_OUT Disable */
 121         PSLR |= PSLR_SL_ROD;
 122
 123         /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
 124         PCFR = PCFR_GPR_EN | PCFR_OPDE;
 125 }
 126
 127 static void spitz_postsuspend(void)
 128 {
 129 }
 130
 131 static int spitz_should_wakeup(unsigned int resume_on_alarm)
 132 {
 133         int is_resume = 0;
 134         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 135
 136         if (spitz_last_ac_status != acin) {
 137                 if (acin) {
 138                         /* charge on */
 139                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 140                         dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
 141                 } else {
 142                         /* charge off */
 143                         dev_dbg(sharpsl_pm.dev, "AC Removed\n");
 144                         sharpsl_pm_led(SHARPSL_LED_OFF);
 145                         sharpsl_pm.machinfo->charge(0);
 146                         sharpsl_pm.charge_mode = CHRG_OFF;
 147                 }
 148                 spitz_last_ac_status = acin;
 149                 /* Return to suspend as this must be what we were woken for */
 150                 return 0;
 151         }
 152
 153         if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
 154                 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
 155
 156         if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
 157                 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
 158
 159         if (resume_on_alarm && (PEDR & PWER_RTC))
 160                 is_resume |= PWER_RTC;
 161
 162         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume);
 163         return is_resume;
 164 }
 165
 166 static bool spitz_charger_wakeup(void)
 167 {
 168         return !gpio_get_value(SPITZ_GPIO_KEY_INT) ||
 169                 gpio_get_value(SPITZ_GPIO_SYNC);
 170 }
 171
 172 static unsigned long spitzpm_read_devdata(int type)
 173 {
 174         switch (type) {
 175         case SHARPSL_STATUS_ACIN:
 176                 return !gpio_get_value(SPITZ_GPIO_AC_IN);
 177         case SHARPSL_STATUS_LOCK:
 178                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
 179         case SHARPSL_STATUS_CHRGFULL:
 180                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
 181         case SHARPSL_STATUS_FATAL:
 182                 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
 183         case SHARPSL_ACIN_VOLT:
 184                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 185         case SHARPSL_BATT_TEMP:
 186                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 187         case SHARPSL_BATT_VOLT:
 188         default:
 189                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 190         }
 191 }
 192
 193 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
 194         .init             = spitz_charger_init,
 195         .exit             = NULL,
 196         .gpio_batlock     = SPITZ_GPIO_BAT_COVER,
 197         .gpio_acin        = SPITZ_GPIO_AC_IN,
 198         .gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
 199         .batfull_irq      = 1,
 200         .gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
 201         .discharge        = spitz_discharge,
 202         .discharge1       = spitz_discharge1,
 203         .charge           = spitz_charge,
 204         .measure_temp     = spitz_measure_temp,
 205         .presuspend       = spitz_presuspend,
 206         .postsuspend      = spitz_postsuspend,
 207         .read_devdata     = spitzpm_read_devdata,
 208         .charger_wakeup   = spitz_charger_wakeup,
 209         .should_wakeup    = spitz_should_wakeup,
 210 #if defined(CONFIG_LCD_CORGI)
 211         .backlight_limit = corgi_lcd_limit_intensity,
 212 #endif
 213         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
 214         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
 215         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
 216         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
 217         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
 218         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
 219         .bat_levels       = 40,
 220         .bat_levels_noac  = sharpsl_battery_levels_noac,
 221         .bat_levels_acin  = sharpsl_battery_levels_acin,
 222         .status_high_acin = 188,
 223         .status_low_acin  = 178,
 224         .status_high_noac = 185,
 225         .status_low_noac  = 175,
 226 };
 227
 228 static struct platform_device *spitzpm_device;
 229
 230 static int spitzpm_init(void)
 231 {
 232         int ret;
 233
 234         if (!machine_is_spitz() && !machine_is_akita()
 235                         && !machine_is_borzoi())
 236                 return -ENODEV;
 237
 238         spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
 239         if (!spitzpm_device)
 240                 return -ENOMEM;
 241
 242         spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
 243         ret = platform_device_add(spitzpm_device);
 244
 245         if (ret)
 246                 platform_device_put(spitzpm_device);
 247
 248         return ret;
 249 }
 250
 251 static void spitzpm_exit(void)
 252 {
 253         platform_device_unregister(spitzpm_device);
 254 }
 255
 256 module_init(spitzpm_init);
 257 module_exit(spitzpm_exit);