mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 10:04:12 +08:00
b302887854
This patch removes a huge amount of code that is now in common code in drivers/char/apm-emulation.c Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
/*
|
|
* APM emulation for PMU-based machines
|
|
*
|
|
* Copyright 2001 Benjamin Herrenschmidt (benh@kernel.crashing.org)
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2, or (at your option) any
|
|
* later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/apm-emulation.h>
|
|
#include <linux/adb.h>
|
|
#include <linux/pmu.h>
|
|
|
|
#define APM_CRITICAL 10
|
|
#define APM_LOW 30
|
|
|
|
static void pmu_apm_get_power_status(struct apm_power_info *info)
|
|
{
|
|
int percentage = -1;
|
|
int batteries = 0;
|
|
int time_units = -1;
|
|
int real_count = 0;
|
|
int i;
|
|
char charging = 0;
|
|
long charge = -1;
|
|
long amperage = 0;
|
|
unsigned long btype = 0;
|
|
|
|
info->battery_status = APM_BATTERY_STATUS_UNKNOWN;
|
|
info->battery_flag = APM_BATTERY_FLAG_UNKNOWN;
|
|
info->units = APM_UNITS_MINS;
|
|
|
|
if (pmu_power_flags & PMU_PWR_AC_PRESENT)
|
|
info->ac_line_status = APM_AC_ONLINE;
|
|
else
|
|
info->ac_line_status = APM_AC_OFFLINE;
|
|
|
|
for (i=0; i<pmu_battery_count; i++) {
|
|
if (pmu_batteries[i].flags & PMU_BATT_PRESENT) {
|
|
batteries++;
|
|
if (percentage < 0)
|
|
percentage = 0;
|
|
if (charge < 0)
|
|
charge = 0;
|
|
percentage += (pmu_batteries[i].charge * 100) /
|
|
pmu_batteries[i].max_charge;
|
|
charge += pmu_batteries[i].charge;
|
|
amperage += pmu_batteries[i].amperage;
|
|
if (btype == 0)
|
|
btype = (pmu_batteries[i].flags & PMU_BATT_TYPE_MASK);
|
|
real_count++;
|
|
if ((pmu_batteries[i].flags & PMU_BATT_CHARGING))
|
|
charging++;
|
|
}
|
|
}
|
|
if (batteries == 0)
|
|
info->ac_line_status = APM_AC_ONLINE;
|
|
|
|
if (real_count) {
|
|
if (amperage < 0) {
|
|
if (btype == PMU_BATT_TYPE_SMART)
|
|
time_units = (charge * 59) / (amperage * -1);
|
|
else
|
|
time_units = (charge * 16440) / (amperage * -60);
|
|
}
|
|
percentage /= real_count;
|
|
if (charging > 0) {
|
|
info->battery_status = APM_BATTERY_STATUS_CHARGING;
|
|
info->battery_flag = APM_BATTERY_FLAG_CHARGING;
|
|
} else if (percentage <= APM_CRITICAL) {
|
|
info->battery_status = APM_BATTERY_STATUS_CRITICAL;
|
|
info->battery_flag = APM_BATTERY_FLAG_CRITICAL;
|
|
} else if (percentage <= APM_LOW) {
|
|
info->battery_status = APM_BATTERY_STATUS_LOW;
|
|
info->battery_flag = APM_BATTERY_FLAG_LOW;
|
|
} else {
|
|
info->battery_status = APM_BATTERY_STATUS_HIGH;
|
|
info->battery_flag = APM_BATTERY_FLAG_HIGH;
|
|
}
|
|
}
|
|
|
|
info->battery_life = percentage;
|
|
info->time = time_units;
|
|
}
|
|
|
|
static int __init apm_emu_init(void)
|
|
{
|
|
apm_get_power_status = pmu_apm_get_power_status;
|
|
|
|
printk(KERN_INFO "apm_emu: PMU APM Emulation initialized.\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit apm_emu_exit(void)
|
|
{
|
|
if (apm_get_power_status == pmu_apm_get_power_status)
|
|
apm_get_power_status = NULL;
|
|
|
|
printk(KERN_INFO "apm_emu: PMU APM Emulation removed.\n");
|
|
}
|
|
|
|
module_init(apm_emu_init);
|
|
module_exit(apm_emu_exit);
|
|
|
|
MODULE_AUTHOR("Benjamin Herrenschmidt");
|
|
MODULE_DESCRIPTION("APM emulation for PowerMac");
|
|
MODULE_LICENSE("GPL");
|