48a03ae863
Patch from Pavel Machek This adds support for battery reading on collie. Collie slowly charges battery even with charging disabled, so I did not yet enable fast charge. Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
279 lines
6.6 KiB
C
279 lines
6.6 KiB
C
/*
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* Based on spitz_pm.c and sharp code.
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*
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* Copyright (C) 2001 SHARP
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* Copyright 2005 Pavel Machek <pavel@suse.cz>
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*
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* Distribute under GPLv2.
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*
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* Li-ion batteries are angry beasts, and they like to explode. This driver is not finished,
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* and sometimes charges them when it should not. If it makes angry lithium to come your way...
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* ...well, you have been warned.
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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/interrupt.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <asm/irq.h>
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#include <asm/mach-types.h>
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#include <asm/hardware.h>
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#include <asm/hardware/scoop.h>
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#include <asm/dma.h>
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#include <asm/arch/collie.h>
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#include <asm/mach/sharpsl_param.h>
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#include <asm/hardware/sharpsl_pm.h>
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#include "../drivers/mfd/ucb1x00.h"
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static struct ucb1x00 *ucb;
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static int ad_revise;
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#define ADCtoPower(x) ((330 * x * 2) / 1024)
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static void collie_charger_init(void)
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{
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int err;
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if (sharpsl_param.adadj != -1) {
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ad_revise = sharpsl_param.adadj;
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}
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/* Register interrupt handler. */
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if ((err = request_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr, SA_INTERRUPT,
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"ACIN", sharpsl_ac_isr))) {
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printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_AC_IN);
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return;
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}
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if ((err = request_irq(COLLIE_IRQ_GPIO_CO, sharpsl_chrg_full_isr, SA_INTERRUPT,
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"CO", sharpsl_chrg_full_isr))) {
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free_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr);
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printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_CO);
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return;
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}
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ucb1x00_io_set_dir(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON | COLLIE_TC35143_GPIO_TMP_ON |
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COLLIE_TC35143_GPIO_BBAT_ON);
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return;
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}
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static void collie_measure_temp(int on)
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{
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if (on)
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ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
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else
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ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
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}
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static void collie_charge(int on)
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{
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if (on) {
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printk("Should start charger\n");
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} else {
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printk("Should stop charger\n");
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}
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#ifdef I_AM_SURE
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/* Zaurus seems to contain LTC1731 ; it should know when to
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* stop charging itself, so setting charge on should be
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* relatively harmless (as long as it is not done too often).
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*/
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#define CF_BUF_CTRL_BASE 0xF0800000
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#define SCOOP_REG(adr) (*(volatile unsigned short*)(CF_BUF_CTRL_BASE+(adr)))
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#define SCOOP_REG_GPWR SCOOP_REG(SCOOP_GPWR)
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if (on) {
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set_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
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} else {
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reset_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
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}
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#endif
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}
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static void collie_discharge(int on)
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{
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}
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static void collie_discharge1(int on)
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{
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}
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static void collie_presuspend(void)
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{
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}
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static void collie_postsuspend(void)
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{
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}
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static int collie_should_wakeup(unsigned int resume_on_alarm)
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{
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return 0;
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}
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static unsigned long collie_charger_wakeup(void)
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{
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return 0;
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}
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int collie_read_backup_battery(void)
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{
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int voltage;
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ucb1x00_adc_enable(ucb);
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/* Gives 75..130 */
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ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_BBAT_ON, 0);
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voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);
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ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
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ucb1x00_adc_disable(ucb);
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printk("Backup battery = %d(%d)\n", ADCtoPower(voltage), voltage);
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return ADCtoPower(voltage);
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}
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int collie_read_main_battery(void)
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{
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int voltage, voltage_rev, voltage_volts;
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ucb1x00_adc_enable(ucb);
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ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
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ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_MBAT_ON, 0);
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/* gives values 160..255 with battery removed... and
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145..255 with battery inserted. (on AC), goes as low as
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80 on DC. */
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voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);
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ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON);
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ucb1x00_adc_disable(ucb);
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voltage_rev = voltage + ((ad_revise * voltage) / 652);
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voltage_volts = ADCtoPower(voltage_rev);
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printk("Main battery = %d(%d)\n", voltage_volts, voltage);
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if (voltage != -1)
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return voltage_volts;
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else
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return voltage;
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}
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int collie_read_temp(void)
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{
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int voltage;
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/* According to Sharp, temp must be > 973, main battery must be < 465,
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FIXME: sharpsl_pm.c has both conditions negated? FIXME: values
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are way out of range? */
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ucb1x00_adc_enable(ucb);
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ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
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/* >1010 = battery removed, 460 = 22C ?, higer = lower temp ? */
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voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD0, UCB_SYNC);
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ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
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ucb1x00_adc_disable(ucb);
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printk("Battery temp = %d\n", voltage);
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return voltage;
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}
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static unsigned long read_devdata(int which)
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{
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switch (which) {
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case SHARPSL_BATT_VOLT:
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return collie_read_main_battery();
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case SHARPSL_BATT_TEMP:
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return collie_read_temp();
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case SHARPSL_ACIN_VOLT:
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return 0x1;
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case SHARPSL_STATUS_ACIN: {
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int ret = GPLR & COLLIE_GPIO_AC_IN;
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printk("AC status = %d\n", ret);
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return ret;
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}
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case SHARPSL_STATUS_FATAL: {
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int ret = GPLR & COLLIE_GPIO_MAIN_BAT_LOW;
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printk("Fatal bat = %d\n", ret);
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return ret;
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}
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default:
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return ~0;
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}
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}
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struct battery_thresh collie_battery_levels[] = {
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{ 368, 100},
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{ 358, 25},
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{ 356, 5},
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{ 0, 0},
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};
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struct sharpsl_charger_machinfo collie_pm_machinfo = {
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.init = collie_charger_init,
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.read_devdata = read_devdata,
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.discharge = collie_discharge,
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.discharge1 = collie_discharge1,
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.charge = collie_charge,
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.measure_temp = collie_measure_temp,
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.presuspend = collie_presuspend,
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.postsuspend = collie_postsuspend,
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.charger_wakeup = collie_charger_wakeup,
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.should_wakeup = collie_should_wakeup,
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.bat_levels = 3,
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.bat_levels_noac = collie_battery_levels,
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.bat_levels_acin = collie_battery_levels,
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.status_high_acin = 368,
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.status_low_acin = 358,
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.status_high_noac = 368,
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.status_low_noac = 358,
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};
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static int __init collie_pm_ucb_add(struct ucb1x00_dev *pdev)
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{
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sharpsl_pm.machinfo = &collie_pm_machinfo;
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ucb = pdev->ucb;
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return 0;
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}
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static struct ucb1x00_driver collie_pm_ucb_driver = {
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.add = collie_pm_ucb_add,
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};
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static struct platform_device *collie_pm_device;
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static int __init collie_pm_init(void)
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{
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int ret;
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collie_pm_device = platform_device_alloc("sharpsl-pm", -1);
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if (!collie_pm_device)
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return -ENOMEM;
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collie_pm_device->dev.platform_data = &collie_pm_machinfo;
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ret = platform_device_add(collie_pm_device);
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if (ret)
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platform_device_put(collie_pm_device);
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if (!ret)
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ret = ucb1x00_register_driver(&collie_pm_ucb_driver);
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return ret;
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}
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static void __exit collie_pm_exit(void)
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{
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ucb1x00_unregister_driver(&collie_pm_ucb_driver);
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platform_device_unregister(collie_pm_device);
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}
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module_init(collie_pm_init);
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module_exit(collie_pm_exit);
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