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/*
* This file is part of the coreboot project.
*
* Copyright 2015 MediaTek 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; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <arch/cache.h>
#include <arch/io.h>
#include <boardid.h>
#include <boot/coreboot_tables.h>
#include <delay.h>
#include <device/device.h>
#include <elog.h>
#include <gpio.h>
#include <soc/da9212.h>
#include <soc/i2c.h>
#include <soc/mt6311.h>
#include <soc/mt6391.h>
#include <soc/mtcmos.h>
#include <soc/pinmux.h>
#include <soc/pll.h>
#include <soc/usb.h>
#include <vendorcode/google/chromeos/chromeos.h>
enum {
CODEC_I2C_BUS = 0,
EXT_BUCK_I2C_BUS = 1,
};
static void configure_ext_buck(void)
{
mtk_i2c_bus_init(EXT_BUCK_I2C_BUS);
switch (board_id()) {
case 3:
case 4:
/* rev-3 and rev-4 use mt6311 as external buck */
gpio_output(PAD_EINT15, 1);
udelay(500);
mt6311_probe(EXT_BUCK_I2C_BUS);
break;
case 2:
default:
/* rev-2 and rev-5 use da9212 as external buck */
mt6391_gpio_output(MT6391_KP_ROW3, 1); /* DA9212_IC_EN */
mt6391_gpio_output(MT6391_KP_ROW4, 1); /* DA9212_EN_A */
udelay(500); /* add 500us delay for powering on da9212 */
da9212_probe(EXT_BUCK_I2C_BUS);
break;
}
}
static void configure_audio(void)
{
mtcmos_audio_power_on();
/* vgp1 set to 1.8V */
mt6391_configure_ldo(LDO_VCAMD, LDO_1P8);
/* delay 1ms for realtek's power sequence request */
mdelay(1);
/* vcama set to 1.8V */
mt6391_configure_ldo(LDO_VCAMA, LDO_1P8);
/* reset ALC5676 */
if (board_id() < 5)
gpio_output(PAD_LCM_RST, 1);
/* SoC I2S */
gpio_set_mode(PAD_I2S0_LRCK, PAD_I2S0_LRCK_FUNC_I2S1_WS);
gpio_set_mode(PAD_I2S0_BCK, PAD_I2S0_BCK_FUNC_I2S1_BCK);
gpio_set_mode(PAD_I2S0_MCK, PAD_I2S0_MCK_FUNC_I2S1_MCK);
gpio_set_mode(PAD_I2S0_DATA0, PAD_I2S0_DATA0_FUNC_I2S1_DO_1);
gpio_set_mode(PAD_I2S0_DATA1, PAD_I2S0_DATA1_FUNC_I2S2_DI_2);
if (board_id() >= 5)
gpio_set_mode(PAD_UCTS0, PAD_UCTS0_FUNC_I2S2_DI_1);
/* codec ext MCLK ON */
mt6391_gpio_output(MT6391_KP_COL4, 1);
mt6391_gpio_output(MT6391_KP_COL5, 1);
/* Init i2c bus Timing register for audio codecs */
mtk_i2c_bus_init(CODEC_I2C_BUS);
/* set I2S clock to 48KHz */
mt_pll_set_aud_div(48 * KHz);
}
static void configure_usb(void)
{
setup_usb_host();
if (board_id() > 3) {
/* Enable current limit */
gpio_output(PAD_CM2MCLK, 1);
/* Configure USB OC pins*/
gpio_input_pullup(PAD_MSDC3_DSL);
gpio_input_pullup(PAD_CMPCLK);
gpio_input_pullup(PAD_PCM_SYNC);
}
if (board_id() > 4) {
/* USB 2.0 type A port over current interrupt pin(low active) */
gpio_input_pullup(PAD_UCTS2);
/* USB 2.0 type A port BC1.2 STATUS(low active) */
gpio_input_pullup(PAD_AUD_DAT_MISO);
}
}
static void configure_usb_hub(void)
{
/* set usb hub reset pin (low active) to high */
if (board_id() > 4)
gpio_output(PAD_UTXD3, 1);
}
/* Setup backlight control pins as output pin and power-off by default */
static void configure_backlight(void)
{
/* Configure PANEL_LCD_POWER_EN */
switch (board_id()) {
case 1:
case 2:
break;
case 3:
gpio_output(PAD_UCTS2, 0);
break;
case 4:
gpio_output(PAD_SRCLKENAI, 0);
break;
default:
gpio_output(PAD_UTXD2, 0);
break;
}
gpio_output(PAD_DISP_PWM0, 0); /* DISP_PWM0 */
gpio_output(PAD_PCM_TX, 0); /* PANEL_POWER_EN */
}
static void mainboard_init(device_t dev)
{
/* TP_SHIFT_EN: Enables the level shifter for I2C bus 4 (TPAD), which
* also contains the PS8640 eDP brige and the USB hub.
*/
if (board_id() < 5)
mt6391_gpio_output(MT6391_KP_ROW2, 1);
/* Config SD card detection pin */
gpio_input(PAD_EINT1); /* SD_DET */
configure_audio();
configure_backlight();
configure_usb();
configure_usb_hub();
configure_ext_buck();
elog_init();
elog_add_watchdog_reset();
elog_add_boot_reason();
}
static void mainboard_enable(device_t dev)
{
dev->ops->init = &mainboard_init;
}
struct chip_operations mainboard_ops = {
.name = "oak",
.enable_dev = mainboard_enable,
};
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