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Release 4.7 drivers/macintosh/apm_emu.c

Directory: drivers/macintosh
/*
 * 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;
}


Contributors
PersonTokensPropCommitsCommitProp
paul mackerraspaul mackerras28274.60%240.00%


johannes bergjohannes berg8121.43%120.00%


olaf heringolaf hering92.38%120.00%


benjamin herrenschmidtbenjamin herrenschmidt61.59%120.00%


Total378100.00%5100.00%






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;
}


Contributors
PersonTokensPropCommitsCommitProp
paul mackerraspaul mackerras1881.82%133.33%


johannes bergjohannes berg313.64%133.33%


david s. millerdavid s. miller14.55%133.33%


Total22100.00%3100.00%






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");
}


Contributors
PersonTokensPropCommitsCommitProp
paul mackerraspaul mackerras1664.00%150.00%


johannes bergjohannes berg936.00%150.00%


Total25100.00%2100.00%




module_init(apm_emu_init);

module_exit(apm_emu_exit);

MODULE_AUTHOR("Benjamin Herrenschmidt");
MODULE_DESCRIPTION("APM emulation for PowerMac");
MODULE_LICENSE("GPL");

Overall Contributors
PersonTokensPropCommitsCommitProp
paul mackerraspaul mackerras35073.84%233.33%


johannes bergjohannes berg10822.78%116.67%


olaf heringolaf hering91.90%116.67%


benjamin herrenschmidtbenjamin herrenschmidt61.27%116.67%


david s. millerdavid s. miller10.21%116.67%


Total474100.00%6100.00%

  
Directory: drivers/macintosh



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