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/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Common functions for battery charging.
*/
#include "battery_smart.h"
#include "charger.h"
#include "common.h"
#include "console.h"
#include "dptf.h"
#include "host_command.h"
#include "printf.h"
#include "util.h"
#include "hooks.h"
/* Console output macros */
#define CPUTS(outstr) cputs(CC_CHARGER, outstr)
#define CPRINTS(format, args...) cprints(CC_CHARGER, format, ## args)
/* DPTF current limit, -1 = none */
static int dptf_limit_ma = -1;
void dptf_set_charging_current_limit(int ma)
{
dptf_limit_ma = ma >= 0 ? ma : -1;
}
int dptf_get_charging_current_limit(void)
{
return dptf_limit_ma;
}
static void dptf_disable_hook(void)
{
/* Before get to Sx, EC should take control of charger from DPTF */
dptf_limit_ma = -1;
}
DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, dptf_disable_hook, HOOK_PRIO_DEFAULT);
DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, dptf_disable_hook, HOOK_PRIO_DEFAULT);
int charger_closest_voltage(int voltage)
{
const struct charger_info *info = charger_get_info();
/*
* If the requested voltage is non-zero but below our minimum,
* return the minimum. See crosbug.com/p/8662.
*/
if (voltage > 0 && voltage < info->voltage_min)
return info->voltage_min;
/* Clip to max */
if (voltage > info->voltage_max)
return info->voltage_max;
/* Otherwise round down to nearest voltage step */
return voltage - (voltage % info->voltage_step);
}
int charger_closest_current(int current)
{
const struct charger_info * const info = charger_get_info();
/* Apply DPTF limit if necessary */
if (dptf_limit_ma >= 0 && current > dptf_limit_ma)
current = dptf_limit_ma;
/*
* If the requested current is non-zero but below our minimum,
* return the minimum. See crosbug.com/p/8662.
*/
if (current > 0 && current < info->current_min)
return info->current_min;
/* Clip to max */
if (current > info->current_max)
return info->current_max;
/* Otherwise round down to nearest current step */
return current - (current % info->current_step);
}
void charger_get_params(struct charger_params *chg)
{
memset(chg, 0, sizeof(*chg));
if (charger_get_current(&chg->current))
chg->flags |= CHG_FLAG_BAD_CURRENT;
if (charger_get_voltage(&chg->voltage))
chg->flags |= CHG_FLAG_BAD_VOLTAGE;
if (charger_get_input_current(&chg->input_current))
chg->flags |= CHG_FLAG_BAD_INPUT_CURRENT;
if (charger_get_status(&chg->status))
chg->flags |= CHG_FLAG_BAD_STATUS;
if (charger_get_option(&chg->option))
chg->flags |= CHG_FLAG_BAD_OPTION;
}
static void print_item_name(const char *name)
{
ccprintf(" %-8s", name);
}
static int check_print_error(int rv)
{
if (rv == EC_SUCCESS)
return 1;
ccputs(rv == EC_ERROR_UNIMPLEMENTED ? "(unsupported)\n" : "(error)\n");
return 0;
}
void print_charger_debug(void)
{
int d;
const struct charger_info *info = charger_get_info();
/* info */
print_item_name("Name:");
ccprintf("%s\n", info->name);
/* option */
print_item_name("Option:");
if (check_print_error(charger_get_option(&d)))
ccprintf("%016b (0x%04x)\n", d, d);
/* manufacturer id */
print_item_name("Man id:");
if (check_print_error(charger_manufacturer_id(&d)))
ccprintf("0x%04x\n", d);
/* device id */
print_item_name("Dev id:");
if (check_print_error(charger_device_id(&d)))
ccprintf("0x%04x\n", d);
/* charge voltage limit */
print_item_name("V_batt:");
if (check_print_error(charger_get_voltage(&d)))
ccprintf("%5d (%4d - %5d, %3d)\n", d,
info->voltage_min, info->voltage_max,
info->voltage_step);
/* charge current limit */
print_item_name("I_batt:");
if (check_print_error(charger_get_current(&d)))
ccprintf("%5d (%4d - %5d, %3d)\n", d,
info->current_min, info->current_max,
info->current_step);
/* input current limit */
print_item_name("I_in:");
if (check_print_error(charger_get_input_current(&d)))
ccprintf("%5d (%4d - %5d, %3d)\n", d,
info->input_current_min, info->input_current_max,
info->input_current_step);
/* dptf current limit */
print_item_name("I_dptf:");
if (dptf_limit_ma >= 0)
ccprintf("%5d\n", dptf_limit_ma);
else
ccputs("disabled\n");
}
static int command_charger(int argc, char **argv)
{
int d;
char *e;
if (argc != 3) {
print_charger_debug();
return EC_SUCCESS;
}
if (strcasecmp(argv[1], "input") == 0) {
d = strtoi(argv[2], &e, 0);
if (*e)
return EC_ERROR_PARAM2;
return charger_set_input_current(d);
} else if (strcasecmp(argv[1], "current") == 0) {
d = strtoi(argv[2], &e, 0);
if (*e)
return EC_ERROR_PARAM2;
return charger_set_current(d);
} else if (strcasecmp(argv[1], "voltage") == 0) {
d = strtoi(argv[2], &e, 0);
if (*e)
return EC_ERROR_PARAM2;
return charger_set_voltage(d);
} else if (strcasecmp(argv[1], "dptf") == 0) {
d = strtoi(argv[2], &e, 0);
if (*e)
return EC_ERROR_PARAM2;
dptf_limit_ma = d;
return EC_SUCCESS;
} else
return EC_ERROR_PARAM1;
}
DECLARE_CONSOLE_COMMAND(charger, command_charger,
"[input | current | voltage | dptf] [newval]",
"Get or set charger param(s)");
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