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Commit f17ef9b2 authored by John Stultz's avatar John Stultz Committed by Anton Vorontsov
Browse files

power: Make test_power driver more dynamic. 

In 2008 Masashi YOKOTA <yokota@pylone.jp> created the virtual
battery driver found here:
http://downloads.pylone.jp/src/virtual_battery/virtual_battery-0.0.1.tar.bz2



It found use out of tree, but was never merged upstream.
Since then the test_power driver has been merged, which provides
very similar functionality.

This patch extends the test_power driver to be more dynamic
at runtime, by merging portions of the Virtual Battery Driver
by Masashi YOKOTA.

With this patch, I can tweak the values in:
/sys/module/test_power/parameters/* and watch the behavior of
the gnome power managment daemon or other battery UI software.

CC: Anton Vorontsov <cbouatmailru@gmail.com>
CC: Akihiro MAEDA <sola.1980.a@gmail.com>
CC: Masashi YOKOTA <yokota@pylone.jp>
Signed-off-by: default avatarJohn Stultz <john.stultz@linaro.org>
Signed-off-by: default avatarAnton Vorontsov <cbouatmailru@gmail.com>
parent 73c244a8

drivers/power/test_power.c

+266 −10
Original line number Diff line number Diff line
@@ -3,6 +3,12 @@ 
 *

 * Copyright 2010  Anton Vorontsov <cbouatmailru@gmail.com>

 *

 * Dynamic module parameter code from the Virtual Battery Driver

 * Copyright (C) 2008 Pylone, Inc.

 * By: Masashi YOKOTA <yokota@pylone.jp>

 * Originally found here:

 * http://downloads.pylone.jp/src/virtual_battery/virtual_battery-0.0.1.tar.bz2

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.
@@ -15,8 +21,12 @@ 
#include <linux/delay.h>

#include <linux/vermagic.h>



static int test_power_ac_online = 1;

static int test_power_battery_status = POWER_SUPPLY_STATUS_CHARGING;

static int ac_online			= 1;

static int battery_status		= POWER_SUPPLY_STATUS_DISCHARGING;

static int battery_health		= POWER_SUPPLY_HEALTH_GOOD;

static int battery_present		= 1; /* true */

static int battery_technology		= POWER_SUPPLY_TECHNOLOGY_LION;

static int battery_capacity		= 50;



static int test_power_get_ac_property(struct power_supply *psy,

				      enum power_supply_property psp,
@@ -24,7 +34,7 @@ static int test_power_get_ac_property(struct power_supply *psy, 
{

	switch (psp) {

	case POWER_SUPPLY_PROP_ONLINE:

		val->intval = test_power_ac_online;

		val->intval = ac_online;

		break;

	default:

		return -EINVAL;
@@ -47,22 +57,30 @@ static int test_power_get_battery_property(struct power_supply *psy, 
		val->strval = UTS_RELEASE;

		break;

	case POWER_SUPPLY_PROP_STATUS:

		val->intval = test_power_battery_status;

		val->intval = battery_status;

		break;

	case POWER_SUPPLY_PROP_CHARGE_TYPE:

		val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;

		break;

	case POWER_SUPPLY_PROP_HEALTH:

		val->intval = POWER_SUPPLY_HEALTH_GOOD;

		val->intval = battery_health;

		break;

	case POWER_SUPPLY_PROP_PRESENT:

		val->intval = battery_present;

		break;

	case POWER_SUPPLY_PROP_TECHNOLOGY:

		val->intval = POWER_SUPPLY_TECHNOLOGY_LION;

		val->intval = battery_technology;

		break;

	case POWER_SUPPLY_PROP_CAPACITY_LEVEL:

		val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;

		break;

	case POWER_SUPPLY_PROP_CAPACITY:

		val->intval = 50;

	case POWER_SUPPLY_PROP_CHARGE_NOW:

		val->intval = battery_capacity;

		break;

	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:

	case POWER_SUPPLY_PROP_CHARGE_FULL:

		val->intval = 100;

		break;

	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:

	case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
@@ -84,9 +102,11 @@ static enum power_supply_property test_power_battery_props[] = { 
	POWER_SUPPLY_PROP_STATUS,

	POWER_SUPPLY_PROP_CHARGE_TYPE,

	POWER_SUPPLY_PROP_HEALTH,

	POWER_SUPPLY_PROP_PRESENT,

	POWER_SUPPLY_PROP_TECHNOLOGY,

	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,

	POWER_SUPPLY_PROP_CHARGE_FULL,

	POWER_SUPPLY_PROP_CHARGE_EMPTY,

	POWER_SUPPLY_PROP_CHARGE_NOW,

	POWER_SUPPLY_PROP_CAPACITY,

	POWER_SUPPLY_PROP_CAPACITY_LEVEL,

	POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
@@ -118,6 +138,7 @@ static struct power_supply test_power_supplies[] = { 
	},

};





static int __init test_power_init(void)

{

	int i;
@@ -145,8 +166,8 @@ static void __exit test_power_exit(void) 
	int i;



	/* Let's see how we handle changes... */

	test_power_ac_online = 0;

	test_power_battery_status = POWER_SUPPLY_STATUS_DISCHARGING;

	ac_online = 0;

	battery_status = POWER_SUPPLY_STATUS_DISCHARGING;

	for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++)

		power_supply_changed(&test_power_supplies[i]);

	pr_info("%s: 'changed' event sent, sleeping for 10 seconds...\n",
@@ -158,6 +179,241 @@ static void __exit test_power_exit(void) 
}

module_exit(test_power_exit);







#define MAX_KEYLENGTH 256

struct battery_property_map {

	int value;

	char const *key;

};



static struct battery_property_map map_ac_online[] = {

	{ 0,  "on"  },

	{ 1,  "off" },

	{ -1, NULL  },

};



static struct battery_property_map map_status[] = {

	{ POWER_SUPPLY_STATUS_CHARGING,     "charging"     },

	{ POWER_SUPPLY_STATUS_DISCHARGING,  "discharging"  },

	{ POWER_SUPPLY_STATUS_NOT_CHARGING, "not-charging" },

	{ POWER_SUPPLY_STATUS_FULL,         "full"         },

	{ -1,                               NULL           },

};



static struct battery_property_map map_health[] = {

	{ POWER_SUPPLY_HEALTH_GOOD,           "good"        },

	{ POWER_SUPPLY_HEALTH_OVERHEAT,       "overheat"    },

	{ POWER_SUPPLY_HEALTH_DEAD,           "dead"        },

	{ POWER_SUPPLY_HEALTH_OVERVOLTAGE,    "overvoltage" },

	{ POWER_SUPPLY_HEALTH_UNSPEC_FAILURE, "failure"     },

	{ -1,                                 NULL          },

};



static struct battery_property_map map_present[] = {

	{ 0,  "false" },

	{ 1,  "true"  },

	{ -1, NULL    },

};



static struct battery_property_map map_technology[] = {

	{ POWER_SUPPLY_TECHNOLOGY_NiMH, "NiMH" },

	{ POWER_SUPPLY_TECHNOLOGY_LION, "LION" },

	{ POWER_SUPPLY_TECHNOLOGY_LIPO, "LIPO" },

	{ POWER_SUPPLY_TECHNOLOGY_LiFe, "LiFe" },

	{ POWER_SUPPLY_TECHNOLOGY_NiCd, "NiCd" },

	{ POWER_SUPPLY_TECHNOLOGY_LiMn, "LiMn" },

	{ -1,				NULL   },

};





static int map_get_value(struct battery_property_map *map, const char *key,

				int def_val)

{

	char buf[MAX_KEYLENGTH];

	int cr;



	strncpy(buf, key, MAX_KEYLENGTH);

	buf[MAX_KEYLENGTH-1] = '\0';



	cr = strnlen(buf, MAX_KEYLENGTH) - 1;

	if (buf[cr] == '\n')

		buf[cr] = '\0';



	while (map->key) {

		if (strncasecmp(map->key, buf, MAX_KEYLENGTH) == 0)

			return map->value;

		map++;

	}



	return def_val;

}





static const char *map_get_key(struct battery_property_map *map, int value,

				const char *def_key)

{

	while (map->key) {

		if (map->value == value)

			return map->key;

		map++;

	}



	return def_key;

}



static int param_set_ac_online(const char *key, const struct kernel_param *kp)

{

	ac_online = map_get_value(map_ac_online, key, ac_online);

	power_supply_changed(&test_power_supplies[0]);

	return 0;

}



static int param_get_ac_online(char *buffer, const struct kernel_param *kp)

{

	strcpy(buffer, map_get_key(map_ac_online, ac_online, "unknown"));

	return strlen(buffer);

}



static int param_set_battery_status(const char *key,

					const struct kernel_param *kp)

{

	battery_status = map_get_value(map_status, key, battery_status);

	power_supply_changed(&test_power_supplies[1]);

	return 0;

}



static int param_get_battery_status(char *buffer, const struct kernel_param *kp)

{

	strcpy(buffer, map_get_key(map_status, battery_status, "unknown"));

	return strlen(buffer);

}



static int param_set_battery_health(const char *key,

					const struct kernel_param *kp)

{

	battery_health = map_get_value(map_health, key, battery_health);

	power_supply_changed(&test_power_supplies[1]);

	return 0;

}



static int param_get_battery_health(char *buffer, const struct kernel_param *kp)

{

	strcpy(buffer, map_get_key(map_health, battery_health, "unknown"));

	return strlen(buffer);

}



static int param_set_battery_present(const char *key,

					const struct kernel_param *kp)

{

	battery_present = map_get_value(map_present, key, battery_present);

	power_supply_changed(&test_power_supplies[0]);

	return 0;

}



static int param_get_battery_present(char *buffer,

					const struct kernel_param *kp)

{

	strcpy(buffer, map_get_key(map_present, battery_present, "unknown"));

	return strlen(buffer);

}



static int param_set_battery_technology(const char *key,

					const struct kernel_param *kp)

{

	battery_technology = map_get_value(map_technology, key,

						battery_technology);

	power_supply_changed(&test_power_supplies[1]);

	return 0;

}



static int param_get_battery_technology(char *buffer,

					const struct kernel_param *kp)

{

	strcpy(buffer,

		map_get_key(map_technology, battery_technology, "unknown"));

	return strlen(buffer);

}



static int param_set_battery_capacity(const char *key,

					const struct kernel_param *kp)

{

	int tmp;



	if (1 != sscanf(key, "%d", &tmp))

		return -EINVAL;



	battery_capacity = tmp;

	power_supply_changed(&test_power_supplies[1]);

	return 0;

}



#define param_get_battery_capacity param_get_int







static struct kernel_param_ops param_ops_ac_online = {

	.set = param_set_ac_online,

	.get = param_get_ac_online,

};



static struct kernel_param_ops param_ops_battery_status = {

	.set = param_set_battery_status,

	.get = param_get_battery_status,

};



static struct kernel_param_ops param_ops_battery_present = {

	.set = param_set_battery_present,

	.get = param_get_battery_present,

};



static struct kernel_param_ops param_ops_battery_technology = {

	.set = param_set_battery_technology,

	.get = param_get_battery_technology,

};



static struct kernel_param_ops param_ops_battery_health = {

	.set = param_set_battery_health,

	.get = param_get_battery_health,

};



static struct kernel_param_ops param_ops_battery_capacity = {

	.set = param_set_battery_capacity,

	.get = param_get_battery_capacity,

};





#define param_check_ac_online(name, p) __param_check(name, p, void);

#define param_check_battery_status(name, p) __param_check(name, p, void);

#define param_check_battery_present(name, p) __param_check(name, p, void);

#define param_check_battery_technology(name, p) __param_check(name, p, void);

#define param_check_battery_health(name, p) __param_check(name, p, void);

#define param_check_battery_capacity(name, p) __param_check(name, p, void);





module_param(ac_online, ac_online, 0644);

MODULE_PARM_DESC(ac_online, "AC charging state <on|off>");



module_param(battery_status, battery_status, 0644);

MODULE_PARM_DESC(battery_status,

	"battery status <charging|discharging|not-charging|full>");



module_param(battery_present, battery_present, 0644);

MODULE_PARM_DESC(battery_present,

	"battery presence state <good|overheat|dead|overvoltage|failure>");



module_param(battery_technology, battery_technology, 0644);

MODULE_PARM_DESC(battery_technology,

	"battery technology <NiMH|LION|LIPO|LiFe|NiCd|LiMn>");



module_param(battery_health, battery_health, 0644);

MODULE_PARM_DESC(battery_health,

	"battery health state <good|overheat|dead|overvoltage|failure>");



module_param(battery_capacity, battery_capacity, 0644);

MODULE_PARM_DESC(battery_capacity, "battery capacity (percentage)");





MODULE_DESCRIPTION("Power supply driver for testing");

MODULE_AUTHOR("Anton Vorontsov <cbouatmailru@gmail.com>");

MODULE_LICENSE("GPL");