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/* Copyright 2015 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.
*/
/* EC for Buddy panel control */
#include "gpio.h"
#include "hooks.h"
#include "i2c.h"
#include "timer.h"
#include "util.h"
#define I2C_PORT_CONVERT 0
#define I2C_ADDR_CONVERT 0x62
#define CMD_NUM 6
enum panel_id_list {
PANEL_LGC = 0,
PANEL_BOE,
PANEL_COUNT,
PANEL_UNKNOWN,
PANEL_NONE,
};
struct converter_cfg {
uint8_t reg;
uint8_t val;
};
static const struct converter_cfg converter_cfg_vals[PANEL_COUNT][CMD_NUM] = {
{
{0x00, 0xB1},
{0x01, 0x43},
{0x02, 0x73},
{0x03, 0x00},
{0x04, 0x00},
{0x05, 0xC7},
},
{
{0x00, 0xB1},
{0x01, 0x43},
{0x02, 0x7B},
{0x03, 0x00},
{0x04, 0x00},
{0x05, 0xB7},
},
};
static int get_panel_id(void)
{
int pin_status = 0;
if (gpio_get_level(GPIO_PANEL_ID1))
pin_status |= 0x01;
if (gpio_get_level(GPIO_PANEL_ID2))
pin_status |= 0x02;
if (gpio_get_level(GPIO_PANEL_ID3))
pin_status |= 0x04;
switch (pin_status) {
case 0x00:
return PANEL_LGC;
case 0x01:
return PANEL_BOE;
case 0x07:
return PANEL_NONE;
default:
return PANEL_UNKNOWN;
}
}
static void panel_converter_setting(void)
{
int i;
int panel_id = get_panel_id();
/* Unidentified panel id must not be configured*/
ASSERT(panel_id != PANEL_UNKNOWN);
if (panel_id == PANEL_NONE)
return;
if (gpio_get_level(CONFIG_BACKLIGHT_REQ_GPIO)) {
for (i = 0; i < CMD_NUM; i++) {
i2c_write8(I2C_PORT_CONVERT, I2C_ADDR_CONVERT,
converter_cfg_vals[panel_id][i].reg,
converter_cfg_vals[panel_id][i].val);
}
}
}
DECLARE_DEFERRED(panel_converter_setting);
static void update_backlight(void)
{
#ifdef CONFIG_BACKLIGHT_REQ_GPIO
if (gpio_get_level(CONFIG_BACKLIGHT_REQ_GPIO)) {
gpio_set_level(GPIO_ENABLE_BACKLIGHT, 1);
hook_call_deferred(&panel_converter_setting, 200 * MSEC);
} else {
gpio_set_level(GPIO_ENABLE_BACKLIGHT, 0);
}
#endif
}
void backlight_interrupt(enum gpio_signal signal)
{
update_backlight();
}
static void convert_init(void)
{
update_backlight();
#ifdef CONFIG_BACKLIGHT_REQ_GPIO
gpio_enable_interrupt(CONFIG_BACKLIGHT_REQ_GPIO);
#endif
}
DECLARE_HOOK(HOOK_INIT, convert_init, HOOK_PRIO_DEFAULT);
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