board/samsung/smdk5250/exynos5-dt.c

/*
 * Copyright (C) 2012 Samsung Electronics
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <fdtdec.h>
#include <asm/io.h>
#include <errno.h>
#include <i2c.h>
#include <netdev.h>
#include <spi.h>
#include <asm/gpio.h>
#include <asm/arch/cpu.h>
#include <asm/arch/dwmmc.h>
#include <asm/arch/mmc.h>
#include <asm/arch/pinmux.h>
#include <asm/arch/power.h>
#include <asm/arch/sromc.h>
#include <power/pmic.h>
#include <power/max77686_pmic.h>
#include <power/tps65090_pmic.h>
#include <tmu.h>

DECLARE_GLOBAL_DATA_PTR;

#ifdef CONFIG_SOUND_MAX98095
static void board_enable_audio_codec(void)
{
	/* Enable MAX98095 Codec */
	gpio_request(EXYNOS5_GPIO_X17, "max98095_enable");
	gpio_direction_output(EXYNOS5_GPIO_X17, 1);
	gpio_set_pull(EXYNOS5_GPIO_X17, S5P_GPIO_PULL_NONE);
}
#endif

int exynos_init(void)
{
#ifdef CONFIG_SOUND_MAX98095
	board_enable_audio_codec();
#endif
	return 0;
}

#if defined(CONFIG_POWER)
#ifdef CONFIG_POWER_MAX77686
static int pmic_reg_update(struct pmic *p, int reg, uint regval)
{
	u32 val;
	int ret = 0;

	ret = pmic_reg_read(p, reg, &val);
	if (ret) {
		debug("%s: PMIC %d register read failed\n", __func__, reg);
		return -1;
	}
	val |= regval;
	ret = pmic_reg_write(p, reg, val);
	if (ret) {
		debug("%s: PMIC %d register write failed\n", __func__, reg);
		return -1;
	}
	return 0;
}

static int max77686_init(void)
{
	struct pmic *p;

	if (pmic_init(I2C_PMIC))
		return -1;

	p = pmic_get("MAX77686_PMIC");
	if (!p)
		return -ENODEV;

	if (pmic_probe(p))
		return -1;

	if (pmic_reg_update(p, MAX77686_REG_PMIC_32KHZ, MAX77686_32KHCP_EN))
		return -1;

	if (pmic_reg_update(p, MAX77686_REG_PMIC_BBAT,
			    MAX77686_BBCHOSTEN | MAX77686_BBCVS_3_5V))
		return -1;

	/* VDD_MIF */
	if (pmic_reg_write(p, MAX77686_REG_PMIC_BUCK1OUT,
			   MAX77686_BUCK1OUT_1V)) {
		debug("%s: PMIC %d register write failed\n", __func__,
		      MAX77686_REG_PMIC_BUCK1OUT);
		return -1;
	}

	if (pmic_reg_update(p, MAX77686_REG_PMIC_BUCK1CRTL,
			    MAX77686_BUCK1CTRL_EN))
		return -1;

	/* VDD_ARM */
	if (pmic_reg_write(p, MAX77686_REG_PMIC_BUCK2DVS1,
			   MAX77686_BUCK2DVS1_1_3V)) {
		debug("%s: PMIC %d register write failed\n", __func__,
		      MAX77686_REG_PMIC_BUCK2DVS1);
		return -1;
	}

	if (pmic_reg_update(p, MAX77686_REG_PMIC_BUCK2CTRL1,
			    MAX77686_BUCK2CTRL_ON))
		return -1;

	/* VDD_INT */
	if (pmic_reg_write(p, MAX77686_REG_PMIC_BUCK3DVS1,
			   MAX77686_BUCK3DVS1_1_0125V)) {
		debug("%s: PMIC %d register write failed\n", __func__,
		      MAX77686_REG_PMIC_BUCK3DVS1);
		return -1;
	}

	if (pmic_reg_update(p, MAX77686_REG_PMIC_BUCK3CTRL,
			    MAX77686_BUCK3CTRL_ON))
		return -1;

	/* VDD_G3D */
	if (pmic_reg_write(p, MAX77686_REG_PMIC_BUCK4DVS1,
			   MAX77686_BUCK4DVS1_1_2V)) {
		debug("%s: PMIC %d register write failed\n", __func__,
		      MAX77686_REG_PMIC_BUCK4DVS1);
		return -1;
	}

	if (pmic_reg_update(p, MAX77686_REG_PMIC_BUCK4CTRL1,
			    MAX77686_BUCK3CTRL_ON))
		return -1;

	/* VDD_LDO2 */
	if (pmic_reg_update(p, MAX77686_REG_PMIC_LDO2CTRL1,
			    MAX77686_LD02CTRL1_1_5V | EN_LDO))
		return -1;

	/* VDD_LDO3 */
	if (pmic_reg_update(p, MAX77686_REG_PMIC_LDO3CTRL1,
			    MAX77686_LD03CTRL1_1_8V | EN_LDO))
		return -1;

	/* VDD_LDO5 */
	if (pmic_reg_update(p, MAX77686_REG_PMIC_LDO5CTRL1,
			    MAX77686_LD05CTRL1_1_8V | EN_LDO))
		return -1;

	/* VDD_LDO10 */
	if (pmic_reg_update(p, MAX77686_REG_PMIC_LDO10CTRL1,
			    MAX77686_LD10CTRL1_1_8V | EN_LDO))
		return -1;

	return 0;
}
#endif	/* CONFIG_POWER_MAX77686 */

int exynos_power_init(void)
{
	int ret = 0;

#ifdef CONFIG_POWER_MAX77686
	ret = max77686_init();
	if (ret)
		return ret;
#endif
#ifdef CONFIG_POWER_TPS65090
	/*
	 * The TPS65090 may not be in the device tree. If so, it is not
	 * an error.
	 */
	ret = tps65090_init();
	if (ret == 0 || ret == -ENODEV)
		return 0;
#endif

	return ret;
}
#endif	/* CONFIG_POWER */

#ifdef CONFIG_LCD
static int board_dp_bridge_setup(void)
{
	const int max_tries = 10;
	int num_tries, node;

	/*
	 * TODO(sjg): Use device tree for GPIOs when exynos GPIO
	 * numbering patch is in mainline.
	 */
	debug("%s\n", __func__);
	node = fdtdec_next_compatible(gd->fdt_blob, 0, COMPAT_NXP_PTN3460);
	if (node < 0) {
		debug("%s: No node for DP bridge in device tree\n", __func__);
		return -ENODEV;
	}

	/* Setup the GPIOs */

	/* PD is ACTIVE_LOW, and initially de-asserted */
	gpio_request(EXYNOS5_GPIO_Y25, "dp_bridge_pd");
	gpio_set_pull(EXYNOS5_GPIO_Y25, S5P_GPIO_PULL_NONE);
	gpio_direction_output(EXYNOS5_GPIO_Y25, 1);

	/* Reset is ACTIVE_LOW */
	gpio_request(EXYNOS5_GPIO_X15, "dp_bridge_reset");
	gpio_set_pull(EXYNOS5_GPIO_X15, S5P_GPIO_PULL_NONE);
	gpio_direction_output(EXYNOS5_GPIO_X15, 0);

	udelay(10);
	gpio_set_value(EXYNOS5_GPIO_X15, 1);

	gpio_request(EXYNOS5_GPIO_X07, "dp_bridge_hpd");
	gpio_direction_input(EXYNOS5_GPIO_X07);

	/*
	 * We need to wait for 90ms after bringing up the bridge since there
	 * is a phantom "high" on the HPD chip during its bootup.  The phantom
	 * high comes within 7ms of de-asserting PD and persists for at least
	 * 15ms.  The real high comes roughly 50ms after PD is de-asserted. The
	 * phantom high makes it hard for us to know when the NXP chip is up.
	 */
	mdelay(90);

	for (num_tries = 0; num_tries < max_tries; num_tries++) {
		/* Check HPD.  If it's high, we're all good. */
		if (gpio_get_value(EXYNOS5_GPIO_X07))
				return 0;

		debug("%s: eDP bridge failed to come up; try %d of %d\n",
		      __func__, num_tries, max_tries);
	}

	/* Immediately go into bridge reset if the hp line is not high */
	return -ENODEV;
}

void exynos_cfg_lcd_gpio(void)
{
	/* For Backlight */
	gpio_request(EXYNOS5_GPIO_B20, "lcd_backlight");
	gpio_cfg_pin(EXYNOS5_GPIO_B20, S5P_GPIO_OUTPUT);
	gpio_set_value(EXYNOS5_GPIO_B20, 1);

	/* LCD power on */
	gpio_request(EXYNOS5_GPIO_X15, "lcd_power");
	gpio_cfg_pin(EXYNOS5_GPIO_X15, S5P_GPIO_OUTPUT);
	gpio_set_value(EXYNOS5_GPIO_X15, 1);

	/* Set Hotplug detect for DP */
	gpio_cfg_pin(EXYNOS5_GPIO_X07, S5P_GPIO_FUNC(0x3));
}

void exynos_set_dp_phy(unsigned int onoff)
{
	set_dp_phy_ctrl(onoff);
}

void exynos_backlight_on(unsigned int on)
{
	debug("%s(%u)\n", __func__, on);

	if (!on)
		return;

#ifdef CONFIG_POWER_TPS65090
	int ret;

	ret = tps65090_fet_enable(1); /* Enable FET1, backlight */
	if (ret)
		return;

	/* T5 in the LCD timing spec (defined as > 10ms) */
	mdelay(10);

	/* board_dp_backlight_pwm */
	gpio_direction_output(EXYNOS5_GPIO_B20, 1);

	/* T6 in the LCD timing spec (defined as > 10ms) */
	mdelay(10);

	/* board_dp_backlight_en */
	gpio_request(EXYNOS5_GPIO_X30, "board_dp_backlight_en");
	gpio_direction_output(EXYNOS5_GPIO_X30, 1);
#endif
}

void exynos_lcd_power_on(void)
{
	int ret;

	debug("%s\n", __func__);

#ifdef CONFIG_POWER_TPS65090
	/* board_dp_lcd_vdd */
	tps65090_fet_enable(6); /* Enable FET6, lcd panel */
#endif

	ret = board_dp_bridge_setup();
	if (ret && ret != -ENODEV)
		printf("LCD bridge failed to enable: %d\n", ret);
}

#endif