[ARM] 3385/1: Battery support for sharp zaurus sl-5500 (collie)
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>
This commit is contained in:
Pavel Machek
Russell King
parent
091c539f08
commit
48a03ae863
|
|
@ -0,0 +1,278 @@
|
|||
/*
|
||||
* Based on spitz_pm.c and sharp code.
|
||||
*
|
||||
* Copyright (C) 2001 SHARP
|
||||
* Copyright 2005 Pavel Machek <pavel@suse.cz>
|
||||
*
|
||||
* Distribute under GPLv2.
|
||||
*
|
||||
* Li-ion batteries are angry beasts, and they like to explode. This driver is not finished,
|
||||
* and sometimes charges them when it should not. If it makes angry lithium to come your way...
|
||||
* ...well, you have been warned.
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/stat.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/platform_device.h>
|
||||
|
||||
#include <asm/irq.h>
|
||||
#include <asm/mach-types.h>
|
||||
#include <asm/hardware.h>
|
||||
#include <asm/hardware/scoop.h>
|
||||
#include <asm/dma.h>
|
||||
#include <asm/arch/collie.h>
|
||||
#include <asm/mach/sharpsl_param.h>
|
||||
#include <asm/hardware/sharpsl_pm.h>
|
||||
|
||||
#include "../drivers/mfd/ucb1x00.h"
|
||||
|
||||
static struct ucb1x00 *ucb;
|
||||
static int ad_revise;
|
||||
|
||||
#define ADCtoPower(x) ((330 * x * 2) / 1024)
|
||||
|
||||
static void collie_charger_init(void)
|
||||
{
|
||||
int err;
|
||||
|
||||
if (sharpsl_param.adadj != -1) {
|
||||
ad_revise = sharpsl_param.adadj;
|
||||
}
|
||||
|
||||
/* Register interrupt handler. */
|
||||
if ((err = request_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr, SA_INTERRUPT,
|
||||
"ACIN", sharpsl_ac_isr))) {
|
||||
printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_AC_IN);
|
||||
return;
|
||||
}
|
||||
if ((err = request_irq(COLLIE_IRQ_GPIO_CO, sharpsl_chrg_full_isr, SA_INTERRUPT,
|
||||
"CO", sharpsl_chrg_full_isr))) {
|
||||
free_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr);
|
||||
printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_CO);
|
||||
return;
|
||||
}
|
||||
|
||||
ucb1x00_io_set_dir(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON | COLLIE_TC35143_GPIO_TMP_ON |
|
||||
COLLIE_TC35143_GPIO_BBAT_ON);
|
||||
return;
|
||||
}
|
||||
|
||||
static void collie_measure_temp(int on)
|
||||
{
|
||||
if (on)
|
||||
ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
|
||||
else
|
||||
ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
|
||||
}
|
||||
|
||||
static void collie_charge(int on)
|
||||
{
|
||||
if (on) {
|
||||
printk("Should start charger\n");
|
||||
} else {
|
||||
printk("Should stop charger\n");
|
||||
}
|
||||
#ifdef I_AM_SURE
|
||||
|
||||
/* Zaurus seems to contain LTC1731 ; it should know when to
|
||||
* stop charging itself, so setting charge on should be
|
||||
* relatively harmless (as long as it is not done too often).
|
||||
*/
|
||||
#define CF_BUF_CTRL_BASE 0xF0800000
|
||||
#define SCOOP_REG(adr) (*(volatile unsigned short*)(CF_BUF_CTRL_BASE+(adr)))
|
||||
#define SCOOP_REG_GPWR SCOOP_REG(SCOOP_GPWR)
|
||||
|
||||
if (on) {
|
||||
set_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
|
||||
} else {
|
||||
reset_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
static void collie_discharge(int on)
|
||||
{
|
||||
}
|
||||
|
||||
static void collie_discharge1(int on)
|
||||
{
|
||||
}
|
||||
|
||||
static void collie_presuspend(void)
|
||||
{
|
||||
}
|
||||
|
||||
static void collie_postsuspend(void)
|
||||
{
|
||||
}
|
||||
|
||||
static int collie_should_wakeup(unsigned int resume_on_alarm)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static unsigned long collie_charger_wakeup(void)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
int collie_read_backup_battery(void)
|
||||
{
|
||||
int voltage;
|
||||
|
||||
ucb1x00_adc_enable(ucb);
|
||||
|
||||
/* Gives 75..130 */
|
||||
ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_BBAT_ON, 0);
|
||||
voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);
|
||||
|
||||
ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
|
||||
ucb1x00_adc_disable(ucb);
|
||||
|
||||
printk("Backup battery = %d(%d)\n", ADCtoPower(voltage), voltage);
|
||||
|
||||
return ADCtoPower(voltage);
|
||||
}
|
||||
|
||||
int collie_read_main_battery(void)
|
||||
{
|
||||
int voltage, voltage_rev, voltage_volts;
|
||||
|
||||
ucb1x00_adc_enable(ucb);
|
||||
ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
|
||||
ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_MBAT_ON, 0);
|
||||
/* gives values 160..255 with battery removed... and
|
||||
145..255 with battery inserted. (on AC), goes as low as
|
||||
80 on DC. */
|
||||
voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);
|
||||
|
||||
ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON);
|
||||
ucb1x00_adc_disable(ucb);
|
||||
|
||||
voltage_rev = voltage + ((ad_revise * voltage) / 652);
|
||||
voltage_volts = ADCtoPower(voltage_rev);
|
||||
|
||||
printk("Main battery = %d(%d)\n", voltage_volts, voltage);
|
||||
|
||||
if (voltage != -1)
|
||||
return voltage_volts;
|
||||
else
|
||||
return voltage;
|
||||
}
|
||||
|
||||
int collie_read_temp(void)
|
||||
{
|
||||
int voltage;
|
||||
|
||||
/* According to Sharp, temp must be > 973, main battery must be < 465,
|
||||
FIXME: sharpsl_pm.c has both conditions negated? FIXME: values
|
||||
are way out of range? */
|
||||
|
||||
ucb1x00_adc_enable(ucb);
|
||||
ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
|
||||
/* >1010 = battery removed, 460 = 22C ?, higer = lower temp ? */
|
||||
voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD0, UCB_SYNC);
|
||||
ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
|
||||
ucb1x00_adc_disable(ucb);
|
||||
|
||||
printk("Battery temp = %d\n", voltage);
|
||||
return voltage;
|
||||
}
|
||||
|
||||
static unsigned long read_devdata(int which)
|
||||
{
|
||||
switch (which) {
|
||||
case SHARPSL_BATT_VOLT:
|
||||
return collie_read_main_battery();
|
||||
case SHARPSL_BATT_TEMP:
|
||||
return collie_read_temp();
|
||||
case SHARPSL_ACIN_VOLT:
|
||||
return 0x1;
|
||||
case SHARPSL_STATUS_ACIN: {
|
||||
int ret = GPLR & COLLIE_GPIO_AC_IN;
|
||||
printk("AC status = %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
case SHARPSL_STATUS_FATAL: {
|
||||
int ret = GPLR & COLLIE_GPIO_MAIN_BAT_LOW;
|
||||
printk("Fatal bat = %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
default:
|
||||
return ~0;
|
||||
}
|
||||
}
|
||||
|
||||
struct battery_thresh collie_battery_levels[] = {
|
||||
{ 368, 100},
|
||||
{ 358, 25},
|
||||
{ 356, 5},
|
||||
{ 0, 0},
|
||||
};
|
||||
|
||||
struct sharpsl_charger_machinfo collie_pm_machinfo = {
|
||||
.init = collie_charger_init,
|
||||
.read_devdata = read_devdata,
|
||||
.discharge = collie_discharge,
|
||||
.discharge1 = collie_discharge1,
|
||||
.charge = collie_charge,
|
||||
.measure_temp = collie_measure_temp,
|
||||
.presuspend = collie_presuspend,
|
||||
.postsuspend = collie_postsuspend,
|
||||
.charger_wakeup = collie_charger_wakeup,
|
||||
.should_wakeup = collie_should_wakeup,
|
||||
.bat_levels = 3,
|
||||
.bat_levels_noac = collie_battery_levels,
|
||||
.bat_levels_acin = collie_battery_levels,
|
||||
.status_high_acin = 368,
|
||||
.status_low_acin = 358,
|
||||
.status_high_noac = 368,
|
||||
.status_low_noac = 358,
|
||||
};
|
||||
|
||||
static int __init collie_pm_ucb_add(struct ucb1x00_dev *pdev)
|
||||
{
|
||||
sharpsl_pm.machinfo = &collie_pm_machinfo;
|
||||
ucb = pdev->ucb;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct ucb1x00_driver collie_pm_ucb_driver = {
|
||||
.add = collie_pm_ucb_add,
|
||||
};
|
||||
|
||||
static struct platform_device *collie_pm_device;
|
||||
|
||||
static int __init collie_pm_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
collie_pm_device = platform_device_alloc("sharpsl-pm", -1);
|
||||
if (!collie_pm_device)
|
||||
return -ENOMEM;
|
||||
|
||||
collie_pm_device->dev.platform_data = &collie_pm_machinfo;
|
||||
ret = platform_device_add(collie_pm_device);
|
||||
|
||||
if (ret)
|
||||
platform_device_put(collie_pm_device);
|
||||
|
||||
if (!ret)
|
||||
ret = ucb1x00_register_driver(&collie_pm_ucb_driver);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __exit collie_pm_exit(void)
|
||||
{
|
||||
ucb1x00_unregister_driver(&collie_pm_ucb_driver);
|
||||
platform_device_unregister(collie_pm_device);
|
||||
}
|
||||
|
||||
module_init(collie_pm_init);
|
||||
module_exit(collie_pm_exit);
|
||||
Loading…
Reference in New Issue