da2014a2b0
This flattens out the board directories in to individual mach groups, we will use this for getting rid of unneeded directories, simplifying the build system, and becoming more coherent with the refactored arch/sh/include topology. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
111 lines
2.7 KiB
C
111 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 <asm/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 = ctrl_inb(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,
|
|
IRQF_DISABLED, 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");
|