/*
* 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.
*
* Actually, this should be quite safe, it seems sharp leaves charger enabled by default,
* and my collie did not explode (yet).
*/
#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 <mach/hardware.h>
#include <asm/hardware/scoop.h>
#include <asm/dma.h>
#include <mach/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, IRQF_DISABLED,
"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, IRQF_DISABLED,
"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)
{
extern struct platform_device colliescoop_device;
/* 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).
*/
if (on) {
set_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
} else {
reset_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
}
}
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);
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);
mdelay(1);
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 ?, higher = 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 500;
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_acin[] = {
{ 420, 100},
{ 417, 95},
{ 415, 90},
{ 413, 80},
{ 411, 75},
{ 408, 70},
{ 406, 60},
{ 403, 50},
{ 398, 40},
{ 391, 25},
{ 10, 5},
{ 0, 0},
};
struct battery_thresh collie_battery_levels[] = {
{ 394, 100},
{ 390, 95},
{ 380, 90},
{ 370, 80},
{ 368, 75}, /* From sharp code: battery high with frontlight */
{ 366, 70}, /* 60..90 -- fake values invented by me for testing */
{ 364, 60},
{ 362, 50},
{ 360, 40},
{ 358, 25}, /* From sharp code: battery low with frontlight */
{ 356, 5}, /* From sharp code: battery verylow with frontlight */
{ 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 = 12,
.bat_levels_noac = collie_battery_levels,
.bat_levels_acin = collie_battery_levels_acin,
.status_high_acin = 368,
.status_low_acin = 358,
.status_high_noac = 368,
.status_low_noac = 358,
.charge_on_volt = 350, /* spitz uses 2.90V, but lets play it safe. */
.charge_on_temp = 550,
.charge_acin_high = 550, /* collie does not seem to have sensor for this, anyway */
.charge_acin_low = 450, /* ignored, too */
.fatal_acin_volt = 356,
.fatal_noacin_volt = 356,
.batfull_irq = 1, /* We do not want periodical charge restarts */
};
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);
