392 lines
10 KiB
C
392 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Power supply driver for testing.
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/power_supply.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/delay.h>
|
|
#include <generated/utsrelease.h>
|
|
|
|
enum test_power_id {
|
|
TEST_BATTERY,
|
|
TEST_AC,
|
|
TEST_POWER_NUM,
|
|
};
|
|
|
|
//
|
|
//
|
|
//
|
|
#define BLKDRV_NAME "BAT0"
|
|
#define FMT_PREFIX ": %s[%d] "
|
|
#define DEBUG_INFO( fmt, arg...) printk( KERN_INFO BLKDRV_NAME FMT_PREFIX fmt, __func__, __LINE__, ##arg )
|
|
|
|
#define TOTAL_LIFE_SECONDS (3 * 60 * 60)
|
|
#define TOTAL_CHARGE (2000 * 1000) // uAH
|
|
#define TOTAL_CHARGE_FULL_SECONDS (60 * 60)
|
|
|
|
static int ac_online = 1;
|
|
static int battery_status = POWER_SUPPLY_STATUS_CHARGING;
|
|
static int battery_level = POWER_SUPPLY_CAPACITY_LEVEL_HIGH;
|
|
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 = 80;
|
|
static int battery_timeleft = TOTAL_LIFE_SECONDS;
|
|
static int battery_temperature = 30;
|
|
static int battery_voltage = (4200 * 1000); // uV
|
|
static bool module_initialized;
|
|
|
|
static int power_get_ac_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
val->intval = ac_online;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int get_battery_propertiesInts( struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val )
|
|
{
|
|
switch( psp ) {
|
|
case POWER_SUPPLY_PROP_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 = battery_health;
|
|
break;
|
|
case POWER_SUPPLY_PROP_PRESENT:
|
|
val->intval = battery_present;
|
|
break;
|
|
case POWER_SUPPLY_PROP_TECHNOLOGY:
|
|
val->intval = battery_technology;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
|
|
val->intval = battery_level;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CAPACITY:
|
|
val->intval = battery_capacity;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_EMPTY:
|
|
val->intval = 0;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_NOW:
|
|
val->intval = battery_capacity * TOTAL_CHARGE / 100;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
|
|
case POWER_SUPPLY_PROP_CHARGE_FULL:
|
|
val->intval = TOTAL_CHARGE;
|
|
break;
|
|
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
|
|
val->intval = battery_timeleft;
|
|
break;
|
|
case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
|
|
val->intval = (100 - battery_capacity) * TOTAL_CHARGE_FULL_SECONDS / 100;
|
|
break;
|
|
case POWER_SUPPLY_PROP_TEMP:
|
|
val->intval = battery_temperature;
|
|
break;
|
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
|
val->intval = battery_voltage;
|
|
break;
|
|
default:
|
|
pr_info("%s: some properties deliberately report errors.\n",
|
|
__func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int get_battery_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_MODEL_NAME:
|
|
val->strval = "Test battery";
|
|
break;
|
|
case POWER_SUPPLY_PROP_MANUFACTURER:
|
|
val->strval = "Linux";
|
|
break;
|
|
case POWER_SUPPLY_PROP_SERIAL_NUMBER:
|
|
val->strval = UTS_RELEASE;
|
|
break;
|
|
default:
|
|
return get_battery_propertiesInts( psy, psp, val );
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum power_supply_property test_power_ac_props[] = {
|
|
POWER_SUPPLY_PROP_ONLINE,
|
|
};
|
|
|
|
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_EMPTY,
|
|
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
|
|
POWER_SUPPLY_PROP_CHARGE_FULL,
|
|
POWER_SUPPLY_PROP_CHARGE_NOW,
|
|
POWER_SUPPLY_PROP_CAPACITY,
|
|
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
|
|
POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
|
|
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
|
|
POWER_SUPPLY_PROP_MODEL_NAME,
|
|
POWER_SUPPLY_PROP_MANUFACTURER,
|
|
POWER_SUPPLY_PROP_SERIAL_NUMBER,
|
|
POWER_SUPPLY_PROP_TEMP,
|
|
POWER_SUPPLY_PROP_VOLTAGE_NOW,
|
|
};
|
|
|
|
static char *test_power_ac_supplied_to[] = {
|
|
"BAT0",
|
|
};
|
|
|
|
static struct power_supply *test_power_supplies[TEST_POWER_NUM];
|
|
|
|
static const struct power_supply_desc test_power_desc[] = {
|
|
[TEST_BATTERY] = {
|
|
.name = "BAT0",
|
|
.type = POWER_SUPPLY_TYPE_BATTERY,
|
|
.properties = test_power_battery_props,
|
|
.num_properties = ARRAY_SIZE(test_power_battery_props),
|
|
.get_property = get_battery_property,
|
|
},
|
|
[TEST_AC] = {
|
|
.name = "AC0",
|
|
.type = POWER_SUPPLY_TYPE_MAINS,
|
|
.properties = test_power_ac_props,
|
|
.num_properties = ARRAY_SIZE(test_power_ac_props),
|
|
.get_property = power_get_ac_property,
|
|
|
|
},
|
|
};
|
|
|
|
static const struct power_supply_config test_power_configs[] = {
|
|
{ /* test_battery */
|
|
},
|
|
{
|
|
/* test_ac */
|
|
.supplied_to = test_power_ac_supplied_to,
|
|
.num_supplicants = ARRAY_SIZE(test_power_ac_supplied_to),
|
|
},
|
|
};
|
|
|
|
static int __init test_power_init(void)
|
|
{
|
|
int i;
|
|
int ret;
|
|
|
|
BUILD_BUG_ON(TEST_POWER_NUM != ARRAY_SIZE(test_power_supplies));
|
|
BUILD_BUG_ON(TEST_POWER_NUM != ARRAY_SIZE(test_power_configs));
|
|
|
|
for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++) {
|
|
test_power_supplies[i] = power_supply_register(NULL,
|
|
&test_power_desc[i],
|
|
&test_power_configs[i]);
|
|
if (IS_ERR(test_power_supplies[i])) {
|
|
pr_err("%s: failed to register %s\n", __func__,
|
|
test_power_desc[i].name);
|
|
ret = PTR_ERR(test_power_supplies[i]);
|
|
goto failed;
|
|
}
|
|
}
|
|
|
|
module_initialized = true;
|
|
return 0;
|
|
failed:
|
|
while (--i >= 0)
|
|
power_supply_unregister(test_power_supplies[i]);
|
|
return ret;
|
|
}
|
|
module_init(test_power_init);
|
|
|
|
static void __exit test_power_exit(void)
|
|
{
|
|
int i;
|
|
|
|
/* Let's see how we handle changes... */
|
|
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",
|
|
__func__);
|
|
ssleep(10);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++)
|
|
power_supply_unregister(test_power_supplies[i]);
|
|
|
|
module_initialized = false;
|
|
}
|
|
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, "off" },
|
|
{ 1, "on" },
|
|
{ -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 int map_get_value(struct battery_property_map *map, const char *key,
|
|
int def_val)
|
|
{
|
|
char buf[MAX_KEYLENGTH];
|
|
int cr;
|
|
|
|
strscpy(buf, key, MAX_KEYLENGTH);
|
|
|
|
cr = strnlen(buf, MAX_KEYLENGTH) - 1;
|
|
if (cr < 0)
|
|
return def_val;
|
|
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 inline void signal_power_supply_changed(struct power_supply *psy)
|
|
{
|
|
if (module_initialized)
|
|
power_supply_changed(psy);
|
|
}
|
|
|
|
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);
|
|
signal_power_supply_changed(test_power_supplies[TEST_AC]);
|
|
return 0;
|
|
}
|
|
|
|
static int param_get_ac_online(char *buffer, const struct kernel_param *kp)
|
|
{
|
|
return sprintf(buffer, "%s\n",
|
|
map_get_key(map_ac_online, ac_online, "unknown"));
|
|
}
|
|
|
|
static int param_set_battery_health(const char *key,
|
|
const struct kernel_param *kp)
|
|
{
|
|
battery_health = map_get_value(map_health, key, battery_health);
|
|
signal_power_supply_changed(test_power_supplies[TEST_BATTERY]);
|
|
return 0;
|
|
}
|
|
|
|
static int param_get_battery_health(char *buffer, const struct kernel_param *kp)
|
|
{
|
|
return sprintf(buffer, "%s\n",
|
|
map_get_key(map_ac_online, battery_health, "unknown"));
|
|
}
|
|
|
|
static int param_set_battery_present(const char *key,
|
|
const struct kernel_param *kp)
|
|
{
|
|
battery_present = map_get_value(map_present, key, battery_present);
|
|
signal_power_supply_changed(test_power_supplies[TEST_AC]);
|
|
return 0;
|
|
}
|
|
|
|
static int param_get_battery_present(char *buffer,
|
|
const struct kernel_param *kp)
|
|
{
|
|
return sprintf(buffer, "%s\n",
|
|
map_get_key(map_ac_online, battery_present, "unknown"));
|
|
}
|
|
|
|
static const struct kernel_param_ops param_ops_ac_online = {
|
|
.set = param_set_ac_online,
|
|
.get = param_get_ac_online,
|
|
};
|
|
|
|
static const struct kernel_param_ops param_ops_battery_present = {
|
|
.set = param_set_battery_present,
|
|
.get = param_get_battery_present,
|
|
};
|
|
|
|
static const struct kernel_param_ops param_ops_battery_health = {
|
|
.set = param_set_battery_health,
|
|
.get = param_get_battery_health,
|
|
};
|
|
|
|
#define param_check_ac_online(name, p) __param_check(name, p, void);
|
|
#define param_check_battery_present(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_present, battery_present, 0644);
|
|
MODULE_PARM_DESC(battery_present,
|
|
"battery presence state <good|overheat|dead|overvoltage|failure>");
|
|
|
|
MODULE_DESCRIPTION("Power supply driver for testing");
|
|
MODULE_AUTHOR("Anton Vorontsov <cbouatmailru@gmail.com>");
|
|
MODULE_LICENSE("GPL");
|
|
|