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/*
* Copyright (C) 2013 WonderMedia Technologies, Inc.
*
* 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 of the License, or (at your
* option) any later version.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <common.h>
#include <command.h>
#include <asm/errno.h>
#include "../../../include/wmt_iomux.h"
#include "../../../include/common_def.h"
#include "../../wmt_battery.h"
struct mp2625_charger {
union {
struct {
unsigned int cable_type:4;
unsigned int current_sw_mode:1;
unsigned int pc_charging:1;
};
uint32_t flag;
};
int full_pin;
int full_level;
int current_pin;
int current_large_level;
};
static struct mp2625_charger charger = {
.full_pin = -1,
.full_level = -1,
.current_pin = -1,
.current_large_level = -1,
};
static inline int __set_large_current(void)
{
if (gpio_is_valid(charger.current_pin))
return gpio_direction_output(charger.current_pin,
charger.current_large_level);
else
return -EIO;
}
static inline int __set_small_current(void)
{
if (gpio_is_valid(charger.current_pin))
return gpio_direction_output(charger.current_pin,
!charger.current_large_level);
else
return -EIO;
}
static int parse_charger_param(void)
{
static const char uboot_env[] = "wmt.charger.param";
enum {
idx_type,
idx_full,
idx_full_l,
idx_curr,
idx_curr_l,
idx_max,
};
char *p, *endp;
long ps[idx_max];
int i = 0, base = 16;
if (!(p = getenv((char *)uboot_env))) {
printf("please setenv %s\n", uboot_env);
return -EINVAL;
}
if ((strncmp(p, "mp2625:", 7)))
return -EINVAL;
p += 7;
while (i < idx_max) {
ps[i++] = simple_strtol(p, &endp, base);
if (*endp == '\0')
break;
p = endp + 1;
if (*p == '\0')
break;
base = 10;
}
charger.flag = ps[0];
charger.full_pin = ps[1];
charger.full_level = ps[2];
charger.current_pin = ps[3];
charger.current_large_level = ps[4];
printf("charger type %s, full_pin %d(%d), current_pin %d(%d)\n",
(charger.cable_type == CABLE_TYPE_DC) ? "DC" : "USB",
charger.full_pin, charger.full_level,
charger.current_pin, charger.current_large_level);
if (gpio_is_valid(charger.full_pin))
gpio_direction_input(charger.full_pin);
__set_small_current();
return 0;
}
static int mp2625_chg_init(void)
{
return parse_charger_param();
}
static enum cable_type mp2625_cable_type(void)
{
return charger.cable_type;
}
static int mp2625_check_full(void)
{
if (gpio_is_valid(charger.full_pin))
return (gpio_get_value(charger.full_pin) == charger.full_level);
else
return -EIO;
}
static int mp2625_pc_charging(void)
{
return charger.pc_charging;
}
static int mp2625_event_proc(enum event_type event)
{
switch (event) {
case POWER_EVENT_DCDET_ADAPTER:
case POWER_EVENT_CHARGING:
return __set_large_current();
case POWER_EVENT_DCDET_USBPC:
return __set_small_current();
case POWER_EVENT_DCDET_PLUGOUT:
return __set_small_current();
case POWER_EVENT_CHARGING_FULL:
return 0;
default:
return -EINVAL;
}
}
// export for extern interface.
struct charger_dev mp2625_charger_dev = {
.name = "mp2625",
.init = mp2625_chg_init,
.cable_type = mp2625_cable_type,
.check_full = mp2625_check_full,
.event_proc = mp2625_event_proc,
.pc_charging = mp2625_pc_charging,
};
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