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