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/interrupt.h>
  18 #include <linux/platform_device.h>
  19 #include <asm/apm.h>
  20 #include <asm/irq.h>
  21 #include <asm/mach-types.h>
  22 #include <asm/hardware.h>
  23 #include <asm/hardware/scoop.h>
  24
  25 #include <asm/arch/sharpsl.h>
  26 #include <asm/arch/spitz.h>
  27 #include <asm/arch/pxa-regs.h>
  28 #include "sharpsl.h"
  29
  30 static int spitz_last_ac_status;
  31
  32 static void spitz_charger_init(void)
  33 {
  34         pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN);
  35         pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
  36         sharpsl_pm_pxa_init();
  37 }
  38
  39 static void spitz_measure_temp(int on)
  40 {
  41         if (on)
  42                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
  43         else
  44                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
  45 }
  46
  47 static void spitz_charge(int on)
  48 {
  49         if (on) {
  50                 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
  51                         set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
  52                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
  53                 } else {
  54                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
  55                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
  56                 }
  57         } else {
  58                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
  59                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
  60         }
  61 }
  62
  63 static void spitz_discharge(int on)
  64 {
  65         if (on)
  66                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
  67         else
  68                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
  69 }
  70
  71 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
  72    on the power bus which the green led on spitz provides */
  73 static void spitz_discharge1(int on)
  74 {
  75         if (on)
  76                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
  77         else
  78                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
  79 }
  80
  81 static void spitz_presuspend(void)
  82 {
  83         spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
  84
  85         /* GPIO Sleep Register */
  86         PGSR0 = 0x00144018;
  87         PGSR1 = 0x00EF0000;
  88         if (machine_is_akita()) {
  89                 PGSR2 = 0x2121C000;
  90                 PGSR3 = 0x00600400;
  91         } else {
  92                 PGSR2 = 0x0121C000;
  93                 PGSR3 = 0x00600000;
  94         }
  95
  96         PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
  97         PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
  98         PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
  99         PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
 100         PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
 101
 102         pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH);
 103
 104         PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
 105         PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 106         PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
 107         PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
 108         PKSR = 0xffffffff; // clear
 109
 110         /* nRESET_OUT Disable */
 111         PSLR |= PSLR_SL_ROD;
 112
 113         /* Clear reset status */
 114         RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
 115
 116         /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
 117         PCFR = PCFR_GPR_EN | PCFR_OPDE;
 118 }
 119
 120 static void spitz_postsuspend(void)
 121 {
 122         pxa_gpio_mode(GPIO18_RDY_MD);
 123         pxa_gpio_mode(10 | GPIO_IN);
 124 }
 125
 126 static int spitz_should_wakeup(unsigned int resume_on_alarm)
 127 {
 128         int is_resume = 0;
 129         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
 130
 131         if (spitz_last_ac_status != acin) {
 132                 if (acin) {
 133                         /* charge on */
 134                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
 135                         dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
 136                 } else {
 137                         /* charge off */
 138                         dev_dbg(sharpsl_pm.dev, "AC Removed\n");
 139                         sharpsl_pm_led(SHARPSL_LED_OFF);
 140                         sharpsl_pm.machinfo->charge(0);
 141                         sharpsl_pm.charge_mode = CHRG_OFF;
 142                 }
 143                 spitz_last_ac_status = acin;
 144                 /* Return to suspend as this must be what we were woken for */
 145                 return 0;
 146         }
 147
 148         if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
 149                 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
 150
 151         if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
 152                 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
 153
 154         if (resume_on_alarm && (PEDR & PWER_RTC))
 155                 is_resume |= PWER_RTC;
 156
 157         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
 158         return is_resume;
 159 }
 160
 161 static unsigned long spitz_charger_wakeup(void)
 162 {
 163         return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
 164 }
 165
 166 unsigned long spitzpm_read_devdata(int type)
 167 {
 168         switch(type) {
 169         case SHARPSL_STATUS_ACIN:
 170                 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0);
 171         case SHARPSL_STATUS_LOCK:
 172                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
 173         case SHARPSL_STATUS_CHRGFULL:
 174                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
 175         case SHARPSL_STATUS_FATAL:
 176                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
 177         case SHARPSL_ACIN_VOLT:
 178                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
 179         case SHARPSL_BATT_TEMP:
 180                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
 181         case SHARPSL_BATT_VOLT:
 182         default:
 183                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
 184         }
 185 }
 186
 187 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
 188         .init             = spitz_charger_init,
 189         .exit             = sharpsl_pm_pxa_remove,
 190         .gpio_batlock     = SPITZ_GPIO_BAT_COVER,
 191         .gpio_acin        = SPITZ_GPIO_AC_IN,
 192         .gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
 193         .gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
 194         .discharge        = spitz_discharge,
 195         .discharge1       = spitz_discharge1,
 196         .charge           = spitz_charge,
 197         .measure_temp     = spitz_measure_temp,
 198         .presuspend       = spitz_presuspend,
 199         .postsuspend      = spitz_postsuspend,
 200         .read_devdata     = spitzpm_read_devdata,
 201         .charger_wakeup   = spitz_charger_wakeup,
 202         .should_wakeup    = spitz_should_wakeup,
 203         .bat_levels       = 40,
 204         .bat_levels_noac  = spitz_battery_levels_noac,
 205         .bat_levels_acin  = spitz_battery_levels_acin,
 206         .status_high_acin = 188,
 207         .status_low_acin  = 178,
 208         .status_high_noac = 185,
 209         .status_low_noac  = 175,
 210 };
 211
 212 static struct platform_device *spitzpm_device;
 213
 214 static int __devinit spitzpm_init(void)
 215 {
 216         int ret;
 217
 218         spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
 219         if (!spitzpm_device)
 220                 return -ENOMEM;
 221
 222         spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
 223         ret = platform_device_add(spitzpm_device);
 224
 225         if (ret)
 226                 platform_device_put(spitzpm_device);
 227
 228         return ret;
 229 }
 230
 231 static void spitzpm_exit(void)
 232 {
 233         platform_device_unregister(spitzpm_device);
 234 }
 235
 236 module_init(spitzpm_init);
 237 module_exit(spitzpm_exit);