forked from Minki/linux
d11584a044
Since commit [e58aa3d2: genirq: Run irq handlers with interrupts disabled], We run all interrupt handlers with interrupts disabled and we even check and yell when an interrupt handler returns with interrupts enabled (see commit [b738a50a: genirq: Warn when handler enables interrupts]). So now this flag is a NOOP and can be removed. Signed-off-by: Yong Zhang <yong.zhang0@gmail.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
112 lines
2.7 KiB
C
112 lines
2.7 KiB
C
/*
|
|
* bios-less APM driver for hp680
|
|
*
|
|
* Copyright 2005 (c) Andriy Skulysh <askulysh@gmail.com>
|
|
* Copyright 2008 (c) Kristoffer Ericson <kristoffer.ericson@gmail.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License.
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/apm-emulation.h>
|
|
#include <linux/io.h>
|
|
#include <asm/adc.h>
|
|
#include <mach/hp6xx.h>
|
|
|
|
/* percentage values */
|
|
#define APM_CRITICAL 10
|
|
#define APM_LOW 30
|
|
|
|
/* resonably sane values */
|
|
#define HP680_BATTERY_MAX 898
|
|
#define HP680_BATTERY_MIN 486
|
|
#define HP680_BATTERY_AC_ON 1023
|
|
|
|
#define MODNAME "hp6x0_apm"
|
|
|
|
#define PGDR 0xa400012c
|
|
|
|
static void hp6x0_apm_get_power_status(struct apm_power_info *info)
|
|
{
|
|
int battery, backup, charging, percentage;
|
|
u8 pgdr;
|
|
|
|
battery = adc_single(ADC_CHANNEL_BATTERY);
|
|
backup = adc_single(ADC_CHANNEL_BACKUP);
|
|
charging = adc_single(ADC_CHANNEL_CHARGE);
|
|
|
|
percentage = 100 * (battery - HP680_BATTERY_MIN) /
|
|
(HP680_BATTERY_MAX - HP680_BATTERY_MIN);
|
|
|
|
/* % of full battery */
|
|
info->battery_life = percentage;
|
|
|
|
/* We want our estimates in minutes */
|
|
info->units = 0;
|
|
|
|
/* Extremely(!!) rough estimate, we will replace this with a datalist later on */
|
|
info->time = (2 * battery);
|
|
|
|
info->ac_line_status = (battery > HP680_BATTERY_AC_ON) ?
|
|
APM_AC_ONLINE : APM_AC_OFFLINE;
|
|
|
|
pgdr = __raw_readb(PGDR);
|
|
if (pgdr & PGDR_MAIN_BATTERY_OUT) {
|
|
info->battery_status = APM_BATTERY_STATUS_NOT_PRESENT;
|
|
info->battery_flag = 0x80;
|
|
} else if (charging < 8) {
|
|
info->battery_status = APM_BATTERY_STATUS_CHARGING;
|
|
info->battery_flag = 0x08;
|
|
info->ac_line_status = 0x01;
|
|
} else if (percentage <= APM_CRITICAL) {
|
|
info->battery_status = APM_BATTERY_STATUS_CRITICAL;
|
|
info->battery_flag = 0x04;
|
|
} else if (percentage <= APM_LOW) {
|
|
info->battery_status = APM_BATTERY_STATUS_LOW;
|
|
info->battery_flag = 0x02;
|
|
} else {
|
|
info->battery_status = APM_BATTERY_STATUS_HIGH;
|
|
info->battery_flag = 0x01;
|
|
}
|
|
}
|
|
|
|
static irqreturn_t hp6x0_apm_interrupt(int irq, void *dev)
|
|
{
|
|
if (!APM_DISABLED)
|
|
apm_queue_event(APM_USER_SUSPEND);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int __init hp6x0_apm_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = request_irq(HP680_BTN_IRQ, hp6x0_apm_interrupt,
|
|
0, MODNAME, NULL);
|
|
if (unlikely(ret < 0)) {
|
|
printk(KERN_ERR MODNAME ": IRQ %d request failed\n",
|
|
HP680_BTN_IRQ);
|
|
return ret;
|
|
}
|
|
|
|
apm_get_power_status = hp6x0_apm_get_power_status;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __exit hp6x0_apm_exit(void)
|
|
{
|
|
free_irq(HP680_BTN_IRQ, 0);
|
|
}
|
|
|
|
module_init(hp6x0_apm_init);
|
|
module_exit(hp6x0_apm_exit);
|
|
|
|
MODULE_AUTHOR("Adriy Skulysh");
|
|
MODULE_DESCRIPTION("hp6xx Advanced Power Management");
|
|
MODULE_LICENSE("GPL");
|