260 lines
6.9 KiB
C
260 lines
6.9 KiB
C
/*
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* Battery and Power Management code for the Sharp SL-Cxx00
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*
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* Copyright (c) 2005 Richard Purdie
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/module.h>
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#include <linux/stat.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <linux/gpio-pxa.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/apm-emulation.h>
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#include <asm/irq.h>
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#include <asm/mach-types.h>
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#include <mach/hardware.h>
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#include <mach/spitz.h>
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#include "pxa27x.h"
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#include "sharpsl_pm.h"
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#include "generic.h"
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#define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */
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#define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */
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#define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */
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#define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */
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#define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */
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#define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */
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static int spitz_last_ac_status;
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static struct gpio spitz_charger_gpios[] = {
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{ SPITZ_GPIO_KEY_INT, GPIOF_IN, "Keyboard Interrupt" },
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{ SPITZ_GPIO_SYNC, GPIOF_IN, "Sync" },
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{ SPITZ_GPIO_AC_IN, GPIOF_IN, "Charger Detection" },
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{ SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
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{ SPITZ_GPIO_JK_B, GPIOF_OUT_INIT_LOW, "JK B" },
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{ SPITZ_GPIO_CHRG_ON, GPIOF_OUT_INIT_LOW, "Charger On" },
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};
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static void spitz_charger_init(void)
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{
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gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios));
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}
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static void spitz_measure_temp(int on)
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{
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gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
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}
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static void spitz_charge(int on)
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{
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if (on) {
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if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
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gpio_set_value(SPITZ_GPIO_JK_B, 1);
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gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
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} else {
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gpio_set_value(SPITZ_GPIO_JK_B, 0);
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gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
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}
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} else {
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gpio_set_value(SPITZ_GPIO_JK_B, 0);
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gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
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}
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}
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static void spitz_discharge(int on)
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{
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gpio_set_value(SPITZ_GPIO_JK_A, on);
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}
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/* HACK - For unknown reasons, accurate voltage readings are only made with a load
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on the power bus which the green led on spitz provides */
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static void spitz_discharge1(int on)
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{
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gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
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}
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static unsigned long gpio18_config = GPIO18_GPIO;
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static void spitz_presuspend(void)
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{
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spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
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/* GPIO Sleep Register */
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PGSR0 = 0x00144018;
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PGSR1 = 0x00EF0000;
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if (machine_is_akita()) {
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PGSR2 = 0x2121C000;
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PGSR3 = 0x00600400;
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} else {
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PGSR2 = 0x0121C000;
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PGSR3 = 0x00600000;
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}
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PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
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PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
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PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
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PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
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PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
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pxa2xx_mfp_config(&gpio18_config, 1);
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gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown");
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gpio_free(18);
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PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
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PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
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PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
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PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
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PKSR = 0xffffffff; /* clear */
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/* nRESET_OUT Disable */
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PSLR |= PSLR_SL_ROD;
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/* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
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PCFR = PCFR_GPR_EN | PCFR_OPDE;
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}
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static void spitz_postsuspend(void)
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{
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}
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static int spitz_should_wakeup(unsigned int resume_on_alarm)
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{
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int is_resume = 0;
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int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
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if (spitz_last_ac_status != acin) {
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if (acin) {
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/* charge on */
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sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
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dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
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} else {
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/* charge off */
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dev_dbg(sharpsl_pm.dev, "AC Removed\n");
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sharpsl_pm_led(SHARPSL_LED_OFF);
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sharpsl_pm.machinfo->charge(0);
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sharpsl_pm.charge_mode = CHRG_OFF;
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}
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spitz_last_ac_status = acin;
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/* Return to suspend as this must be what we were woken for */
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return 0;
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}
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if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
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is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
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if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
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is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
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if (resume_on_alarm && (PEDR & PWER_RTC))
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is_resume |= PWER_RTC;
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dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume);
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return is_resume;
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}
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static bool spitz_charger_wakeup(void)
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{
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return !gpio_get_value(SPITZ_GPIO_KEY_INT) ||
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gpio_get_value(SPITZ_GPIO_SYNC);
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}
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unsigned long spitzpm_read_devdata(int type)
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{
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switch (type) {
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case SHARPSL_STATUS_ACIN:
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return !gpio_get_value(SPITZ_GPIO_AC_IN);
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case SHARPSL_STATUS_LOCK:
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return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
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case SHARPSL_STATUS_CHRGFULL:
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return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
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case SHARPSL_STATUS_FATAL:
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return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
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case SHARPSL_ACIN_VOLT:
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return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
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case SHARPSL_BATT_TEMP:
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return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
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case SHARPSL_BATT_VOLT:
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default:
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return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
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}
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}
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struct sharpsl_charger_machinfo spitz_pm_machinfo = {
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.init = spitz_charger_init,
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.exit = NULL,
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.gpio_batlock = SPITZ_GPIO_BAT_COVER,
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.gpio_acin = SPITZ_GPIO_AC_IN,
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.gpio_batfull = SPITZ_GPIO_CHRG_FULL,
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.batfull_irq = 1,
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.gpio_fatal = SPITZ_GPIO_FATAL_BAT,
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.discharge = spitz_discharge,
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.discharge1 = spitz_discharge1,
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.charge = spitz_charge,
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.measure_temp = spitz_measure_temp,
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.presuspend = spitz_presuspend,
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.postsuspend = spitz_postsuspend,
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.read_devdata = spitzpm_read_devdata,
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.charger_wakeup = spitz_charger_wakeup,
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.should_wakeup = spitz_should_wakeup,
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#if defined(CONFIG_LCD_CORGI)
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.backlight_limit = corgi_lcd_limit_intensity,
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#endif
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.charge_on_volt = SHARPSL_CHARGE_ON_VOLT,
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.charge_on_temp = SHARPSL_CHARGE_ON_TEMP,
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.charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
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.charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW,
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.fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT,
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.fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
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.bat_levels = 40,
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.bat_levels_noac = sharpsl_battery_levels_noac,
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.bat_levels_acin = sharpsl_battery_levels_acin,
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.status_high_acin = 188,
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.status_low_acin = 178,
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.status_high_noac = 185,
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.status_low_noac = 175,
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};
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static struct platform_device *spitzpm_device;
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static int spitzpm_init(void)
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{
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int ret;
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if (!machine_is_spitz() && !machine_is_akita()
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&& !machine_is_borzoi())
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return -ENODEV;
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spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
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if (!spitzpm_device)
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return -ENOMEM;
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spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
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ret = platform_device_add(spitzpm_device);
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if (ret)
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platform_device_put(spitzpm_device);
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return ret;
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}
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static void spitzpm_exit(void)
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{
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platform_device_unregister(spitzpm_device);
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}
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module_init(spitzpm_init);
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module_exit(spitzpm_exit);
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