src/mainboard/google/oak/mainboard.c - chromiumos/third_party/coreboot - Git at Google

 /*
  * 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 <bootmode.h>
 #include <console/console.h>
 #include <delay.h>
 #include <device/device.h>
 #include <drivers/parade/ps8640/ps8640.h>
 #include <edid.h>

 #include <elog.h>
 #include <gpio.h>
 #include <soc/da9212.h>
 #include <soc/ddp.h>
 #include <soc/dsi.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() + CONFIG_BOARD_ID_ADJUSTMENT) {
 	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_touchscreen(void)
 {
 	/* Pull low reset gpio for 500us and then pull high */
 	if (board_id() + CONFIG_BOARD_ID_ADJUSTMENT >= 7) {
 		gpio_output(PAD_PCM_SYNC, 0);
 		udelay(500);
 		gpio_output(PAD_PCM_SYNC, 1);
 	}
 }

 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() + CONFIG_BOARD_ID_ADJUSTMENT < 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);
 	/* codec ext MCLK ON */
 	mt6391_gpio_output(MT6391_KP_COL4, 1);

 	switch (board_id() + CONFIG_BOARD_ID_ADJUSTMENT) {
 	case 2:
 	case 3:
 	case 4:
 		mt6391_gpio_output(MT6391_KP_COL5, 1);
 		break;
 	case 5:
 	case 6:
 		gpio_set_mode(PAD_UCTS0, PAD_UCTS0_FUNC_I2S2_DI_1);
 		mt6391_gpio_output(MT6391_KP_COL5, 1);
 		break;
 	default:
 		break;
 	}

 	/* 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() + CONFIG_BOARD_ID_ADJUSTMENT > 3) {
 		/* Type C port 0 Over current alert pin */
 		gpio_input_pullup(PAD_MSDC3_DSL);
 		if (!IS_ENABLED(CONFIG_BOARD_GOOGLE_ROWAN)) {
 			/* Enable USB3 type A port 0 5V load switch */
 			gpio_output(PAD_CM2MCLK, 1);
 			/* USB3 Type A port 0 power over current alert pin */
 			gpio_input_pullup(PAD_CMPCLK);
 		}
 		/* Type C port 1 over current alert pin */
 		if (board_id() + CONFIG_BOARD_ID_ADJUSTMENT < 7)
 			gpio_input_pullup(PAD_PCM_SYNC);
 	}

 	if (board_id() + CONFIG_BOARD_ID_ADJUSTMENT > 4 &&
 	    board_id() + CONFIG_BOARD_ID_ADJUSTMENT < 7)
 	{
 		/* 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)
 {
 	if (IS_ENABLED(CONFIG_BOARD_GOOGLE_ROWAN))
 		return;

 	/* set usb hub reset pin (low active) to high */
 	if (board_id() + CONFIG_BOARD_ID_ADJUSTMENT > 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() + CONFIG_BOARD_ID_ADJUSTMENT) {
 	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 configure_display(void)
 {
 	mtcmos_display_power_on();

 	/* board from Rev2 */
 	gpio_output(PAD_CMMCLK, 1); /* PANEL_3V3_ENABLE */
 	/* vgp2 set to 3.3V for ps8640 */
 	mt6391_configure_ldo(LDO_VGP2, LDO_3P3);
 	gpio_output(PAD_URTS0, 0); /* PS8640_SYSRSTN */
 	/* PS8640_1V2_ENABLE */
 	if (board_id() + CONFIG_BOARD_ID_ADJUSTMENT == 4)
 		gpio_output(PAD_SRCLKENAI2, 1);
 	else
 		gpio_output(PAD_URTS2, 1);
 	/* delay 2ms for vgp2 and PS8640_1V2_ENABLE stable */
 	mdelay(2);
 	/* PS8640_PDN */
 	if (board_id() + CONFIG_BOARD_ID_ADJUSTMENT > 4)
 		gpio_output(PAD_LCM_RST, 1);
 	else
 		gpio_output(PAD_UCTS0, 1);
 	gpio_output(PAD_PCM_CLK, 1); /* PS8640_MODE_CONF */
 	gpio_output(PAD_URTS0, 1); /* PS8640_SYSRSTN */
 	/* for level shift(1.8V to 3.3V) on */
 	udelay(100);
 }

 static void display_startup(void)
 {
 	struct edid edid;
 	u8 i2c_bus, i2c_addr;
 	int ret;

 	if (board_id() + CONFIG_BOARD_ID_ADJUSTMENT > 6) {
 		i2c_bus = 0;
 		i2c_addr = 0x8;
 	} else {
 		i2c_bus = 4;
 		i2c_addr = 0x18;
 	}

 	mtk_i2c_bus_init(i2c_bus);

 	ps8640_init(i2c_bus, i2c_addr);
 	if (ps8640_get_edid(i2c_bus, i2c_addr, &edid)) {
 		printk(BIOS_ERR, "Can't get panel's edid\n");
 		return;
 	}

 	edid.x_resolution = edid.mode.ha;
 	edid.y_resolution = edid.mode.va;
 	edid.bytes_per_line = edid.mode.ha * edid.framebuffer_bits_per_pixel /
 			      8;

 	mtk_ddp_init();
 	ret = mtk_dsi_init(MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE,
 			   MIPI_DSI_FMT_RGB888, 4, &edid);
 	if (ret < 0) {
 		printk(BIOS_ERR, "dsi init fail\n");
 		return;
 	}

 	mtk_ddp_mode_set(&edid);

 	set_vbe_mode_info_valid(&edid, (uintptr_t)0);
 }

 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() + CONFIG_BOARD_ID_ADJUSTMENT < 5)
 		mt6391_gpio_output(MT6391_KP_ROW2, 1);

 	/* Config SD card detection pin */
 	gpio_input(PAD_EINT1); /* SD_DET */

 	configure_audio();

 	/* fix dsi lp mode is half voltage attenuation */
 	mtk_dsi_pin_drv_ctrl();

 	if (display_init_required()) {
 		if (IS_ENABLED(CONFIG_BOARD_GOOGLE_ROWAN)) {
 			/* display initialization for Rowan */
 		} else {
 			configure_backlight();
 			configure_display();
 			display_startup();
 		}
 	} else {
 		printk(BIOS_INFO, "Skipping display init.\n");
 	}
 	configure_usb();
 	configure_usb_hub();
 	configure_ext_buck();
 	configure_touchscreen();
 }

 static void mainboard_enable(device_t dev)
 {
 	dev->ops->init = &mainboard_init;
 }

 struct chip_operations mainboard_ops = {
 	.name = "oak",
 	.enable_dev = mainboard_enable,
 };
	/*
	* 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 <bootmode.h>
	#include <console/console.h>
	#include <delay.h>
	#include <device/device.h>
	#include <drivers/parade/ps8640/ps8640.h>
	#include <edid.h>

	#include <elog.h>
	#include <gpio.h>
	#include <soc/da9212.h>
	#include <soc/ddp.h>
	#include <soc/dsi.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() + CONFIG_BOARD_ID_ADJUSTMENT) {
	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_touchscreen(void)
	{
	/* Pull low reset gpio for 500us and then pull high */
	if (board_id() + CONFIG_BOARD_ID_ADJUSTMENT >= 7) {
	gpio_output(PAD_PCM_SYNC, 0);
	udelay(500);
	gpio_output(PAD_PCM_SYNC, 1);
	}
	}

	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() + CONFIG_BOARD_ID_ADJUSTMENT < 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);
	/* codec ext MCLK ON */
	mt6391_gpio_output(MT6391_KP_COL4, 1);

	switch (board_id() + CONFIG_BOARD_ID_ADJUSTMENT) {
	case 2:
	case 3:
	case 4:
	mt6391_gpio_output(MT6391_KP_COL5, 1);
	break;
	case 5:
	case 6:
	gpio_set_mode(PAD_UCTS0, PAD_UCTS0_FUNC_I2S2_DI_1);
	mt6391_gpio_output(MT6391_KP_COL5, 1);
	break;
	default:
	break;
	}

	/* 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() + CONFIG_BOARD_ID_ADJUSTMENT > 3) {
	/* Type C port 0 Over current alert pin */
	gpio_input_pullup(PAD_MSDC3_DSL);
	if (!IS_ENABLED(CONFIG_BOARD_GOOGLE_ROWAN)) {
	/* Enable USB3 type A port 0 5V load switch */
	gpio_output(PAD_CM2MCLK, 1);
	/* USB3 Type A port 0 power over current alert pin */
	gpio_input_pullup(PAD_CMPCLK);
	}
	/* Type C port 1 over current alert pin */
	if (board_id() + CONFIG_BOARD_ID_ADJUSTMENT < 7)
	gpio_input_pullup(PAD_PCM_SYNC);
	}

	if (board_id() + CONFIG_BOARD_ID_ADJUSTMENT > 4 &&
	board_id() + CONFIG_BOARD_ID_ADJUSTMENT < 7)
	{
	/* 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)
	{
	if (IS_ENABLED(CONFIG_BOARD_GOOGLE_ROWAN))
	return;

	/* set usb hub reset pin (low active) to high */
	if (board_id() + CONFIG_BOARD_ID_ADJUSTMENT > 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() + CONFIG_BOARD_ID_ADJUSTMENT) {
	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 configure_display(void)
	{
	mtcmos_display_power_on();

	/* board from Rev2 */
	gpio_output(PAD_CMMCLK, 1); /* PANEL_3V3_ENABLE */
	/* vgp2 set to 3.3V for ps8640 */
	mt6391_configure_ldo(LDO_VGP2, LDO_3P3);
	gpio_output(PAD_URTS0, 0); /* PS8640_SYSRSTN */
	/* PS8640_1V2_ENABLE */
	if (board_id() + CONFIG_BOARD_ID_ADJUSTMENT == 4)
	gpio_output(PAD_SRCLKENAI2, 1);
	else
	gpio_output(PAD_URTS2, 1);
	/* delay 2ms for vgp2 and PS8640_1V2_ENABLE stable */
	mdelay(2);
	/* PS8640_PDN */
	if (board_id() + CONFIG_BOARD_ID_ADJUSTMENT > 4)
	gpio_output(PAD_LCM_RST, 1);
	else
	gpio_output(PAD_UCTS0, 1);
	gpio_output(PAD_PCM_CLK, 1); /* PS8640_MODE_CONF */
	gpio_output(PAD_URTS0, 1); /* PS8640_SYSRSTN */
	/* for level shift(1.8V to 3.3V) on */
	udelay(100);
	}

	static void display_startup(void)
	{
	struct edid edid;
	u8 i2c_bus, i2c_addr;
	int ret;

	if (board_id() + CONFIG_BOARD_ID_ADJUSTMENT > 6) {
	i2c_bus = 0;
	i2c_addr = 0x8;
	} else {
	i2c_bus = 4;
	i2c_addr = 0x18;
	}

	mtk_i2c_bus_init(i2c_bus);

	ps8640_init(i2c_bus, i2c_addr);
	if (ps8640_get_edid(i2c_bus, i2c_addr, &edid)) {
	printk(BIOS_ERR, "Can't get panel's edid\n");
	return;
	}

	edid.x_resolution = edid.mode.ha;
	edid.y_resolution = edid.mode.va;
	edid.bytes_per_line = edid.mode.ha * edid.framebuffer_bits_per_pixel /
	8;

	mtk_ddp_init();
	ret = mtk_dsi_init(MIPI_DSI_MODE_VIDEO \| MIPI_DSI_MODE_VIDEO_SYNC_PULSE,
	MIPI_DSI_FMT_RGB888, 4, &edid);
	if (ret < 0) {
	printk(BIOS_ERR, "dsi init fail\n");
	return;
	}

	mtk_ddp_mode_set(&edid);

	set_vbe_mode_info_valid(&edid, (uintptr_t)0);
	}

	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() + CONFIG_BOARD_ID_ADJUSTMENT < 5)
	mt6391_gpio_output(MT6391_KP_ROW2, 1);

	/* Config SD card detection pin */
	gpio_input(PAD_EINT1); /* SD_DET */

	configure_audio();

	/* fix dsi lp mode is half voltage attenuation */
	mtk_dsi_pin_drv_ctrl();

	if (display_init_required()) {
	if (IS_ENABLED(CONFIG_BOARD_GOOGLE_ROWAN)) {
	/* display initialization for Rowan */
	} else {
	configure_backlight();
	configure_display();
	display_startup();
	}
	} else {
	printk(BIOS_INFO, "Skipping display init.\n");
	}
	configure_usb();
	configure_usb_hub();
	configure_ext_buck();
	configure_touchscreen();
	}

	static void mainboard_enable(device_t dev)
	{
	dev->ops->init = &mainboard_init;
	}

	struct chip_operations mainboard_ops = {
	.name = "oak",
	.enable_dev = mainboard_enable,
	};