arch/arm/cpu/armv7/exynos/pinmux.c

/*
 * Copyright (c) 2012 Samsung Electronics.
 * Abhilash Kesavan <a.kesavan@samsung.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <fdtdec.h>
#include <asm/arch/gpio.h>
#include <asm/arch/pinmux.h>
#include <asm/arch/sromc.h>

static void exynos5_uart_config(int peripheral)
{
	int i, start, count;

	switch (peripheral) {
	case PERIPH_ID_UART0:
		start = EXYNOS5_GPIO_A00;
		count = 4;
		break;
	case PERIPH_ID_UART1:
		start = EXYNOS5_GPIO_D00;
		count = 4;
		break;
	case PERIPH_ID_UART2:
		start = EXYNOS5_GPIO_A10;
		count = 4;
		break;
	case PERIPH_ID_UART3:
		start = EXYNOS5_GPIO_A14;
		count = 2;
		break;
	default:
		debug("%s: invalid peripheral %d", __func__, peripheral);
		return;
	}
	for (i = start; i < start + count; i++) {
		gpio_set_pull(i, S5P_GPIO_PULL_NONE);
		gpio_cfg_pin(i, S5P_GPIO_FUNC(0x2));
	}
}

static void exynos5420_uart_config(int peripheral)
{
	int i, start, count;

	switch (peripheral) {
	case PERIPH_ID_UART0:
		start = EXYNOS5420_GPIO_A00;
		count = 4;
		break;
	case PERIPH_ID_UART1:
		start = EXYNOS5420_GPIO_A04;
		count = 4;
		break;
	case PERIPH_ID_UART2:
		start = EXYNOS5420_GPIO_A10;
		count = 4;
		break;
	case PERIPH_ID_UART3:
		start = EXYNOS5420_GPIO_A14;
		count = 2;
		break;
	default:
		debug("%s: invalid peripheral %d", __func__, peripheral);
		return;
	}

	for (i = start; i < start + count; i++) {
		gpio_set_pull(i, S5P_GPIO_PULL_NONE);
		gpio_cfg_pin(i, S5P_GPIO_FUNC(0x2));
	}
}

static int exynos5_mmc_config(int peripheral, int flags)
{
	int i, start, start_ext, gpio_func = 0;

	switch (peripheral) {
	case PERIPH_ID_SDMMC0:
		start = EXYNOS5_GPIO_C00;
		start_ext = EXYNOS5_GPIO_C10;
		gpio_func = S5P_GPIO_FUNC(0x2);
		break;
	case PERIPH_ID_SDMMC1:
		start = EXYNOS5_GPIO_C20;
		start_ext = 0;
		break;
	case PERIPH_ID_SDMMC2:
		start = EXYNOS5_GPIO_C30;
		start_ext = EXYNOS5_GPIO_C43;
		gpio_func = S5P_GPIO_FUNC(0x3);
		break;
	case PERIPH_ID_SDMMC3:
		start = EXYNOS5_GPIO_C40;
		start_ext = 0;
		break;
	default:
		debug("%s: invalid peripheral %d", __func__, peripheral);
		return -1;
	}
	if ((flags & PINMUX_FLAG_8BIT_MODE) && !start_ext) {
		debug("SDMMC device %d does not support 8bit mode",
				peripheral);
		return -1;
	}
	if (flags & PINMUX_FLAG_8BIT_MODE) {
		for (i = start_ext; i <= (start_ext + 3); i++) {
			gpio_cfg_pin(i, gpio_func);
			gpio_set_pull(i, S5P_GPIO_PULL_UP);
			gpio_set_drv(i, S5P_GPIO_DRV_4X);
		}
	}
	for (i = start; i < (start + 2); i++) {
		gpio_cfg_pin(i, S5P_GPIO_FUNC(0x2));
		gpio_set_pull(i, S5P_GPIO_PULL_NONE);
		gpio_set_drv(i, S5P_GPIO_DRV_4X);
	}
	for (i = (start + 3); i <= (start + 6); i++) {
		gpio_cfg_pin(i, S5P_GPIO_FUNC(0x2));
		gpio_set_pull(i, S5P_GPIO_PULL_UP);
		gpio_set_drv(i, S5P_GPIO_DRV_4X);
	}

	return 0;
}

static int exynos5420_mmc_config(int peripheral, int flags)
{
	int i, start = 0, start_ext = 0;

	switch (peripheral) {
	case PERIPH_ID_SDMMC0:
		start = EXYNOS5420_GPIO_C00;
		start_ext = EXYNOS5420_GPIO_C30;
		break;
	case PERIPH_ID_SDMMC1:
		start = EXYNOS5420_GPIO_C10;
		start_ext = EXYNOS5420_GPIO_D14;
		break;
	case PERIPH_ID_SDMMC2:
		start = EXYNOS5420_GPIO_C20;
		start_ext = 0;
		break;
	default:
		start = 0;
		debug("%s: invalid peripheral %d", __func__, peripheral);
		return -1;
	}

	if ((flags & PINMUX_FLAG_8BIT_MODE) && !start_ext) {
		debug("SDMMC device %d does not support 8bit mode",
		      peripheral);
		return -1;
	}

	if (flags & PINMUX_FLAG_8BIT_MODE) {
		for (i = start_ext; i <= (start_ext + 3); i++) {
			gpio_cfg_pin(i, S5P_GPIO_FUNC(0x2));
			gpio_set_pull(i, S5P_GPIO_PULL_UP);
			gpio_set_drv(i, S5P_GPIO_DRV_4X);
		}
	}

	for (i = start; i < (start + 3); i++) {
		/*
		 * MMC0 is intended to be used for eMMC. The
		 * card detect pin is used as a VDDEN signal to
		 * power on the eMMC. The 5420 iROM makes
		 * this same assumption.
		 */
		if ((peripheral == PERIPH_ID_SDMMC0) && (i == (start + 2))) {
			gpio_set_value(i, 1);
			gpio_cfg_pin(i, S5P_GPIO_OUTPUT);
		} else {
			gpio_cfg_pin(i, S5P_GPIO_FUNC(0x2));
		}
		gpio_set_pull(i, S5P_GPIO_PULL_NONE);
		gpio_set_drv(i, S5P_GPIO_DRV_4X);
	}

	for (i = (start + 3); i <= (start + 6); i++) {
		gpio_cfg_pin(i, S5P_GPIO_FUNC(0x2));
		gpio_set_pull(i, S5P_GPIO_PULL_UP);
		gpio_set_drv(i, S5P_GPIO_DRV_4X);
	}

	return 0;
}

static void exynos5_sromc_config(int flags)
{
	int i;

	/*
	 * SROM:CS1 and EBI
	 *
	 * GPY0[0]	SROM_CSn[0]
	 * GPY0[1]	SROM_CSn[1](2)
	 * GPY0[2]	SROM_CSn[2]
	 * GPY0[3]	SROM_CSn[3]
	 * GPY0[4]	EBI_OEn(2)
	 * GPY0[5]	EBI_EEn(2)
	 *
	 * GPY1[0]	EBI_BEn[0](2)
	 * GPY1[1]	EBI_BEn[1](2)
	 * GPY1[2]	SROM_WAIT(2)
	 * GPY1[3]	EBI_DATA_RDn(2)
	 */
	gpio_cfg_pin(EXYNOS5_GPIO_Y00 + (flags & PINMUX_FLAG_BANK),
		     S5P_GPIO_FUNC(2));
	gpio_cfg_pin(EXYNOS5_GPIO_Y04, S5P_GPIO_FUNC(2));
	gpio_cfg_pin(EXYNOS5_GPIO_Y05, S5P_GPIO_FUNC(2));

	for (i = 0; i < 4; i++)
		gpio_cfg_pin(EXYNOS5_GPIO_Y10 + i, S5P_GPIO_FUNC(2));

	/*
	 * EBI: 8 Addrss Lines
	 *
	 * GPY3[0]	EBI_ADDR[0](2)
	 * GPY3[1]	EBI_ADDR[1](2)
	 * GPY3[2]	EBI_ADDR[2](2)
	 * GPY3[3]	EBI_ADDR[3](2)
	 * GPY3[4]	EBI_ADDR[4](2)
	 * GPY3[5]	EBI_ADDR[5](2)
	 * GPY3[6]	EBI_ADDR[6](2)
	 * GPY3[7]	EBI_ADDR[7](2)
	 *
	 * EBI: 16 Data Lines
	 *
	 * GPY5[0]	EBI_DATA[0](2)
	 * GPY5[1]	EBI_DATA[1](2)
	 * GPY5[2]	EBI_DATA[2](2)
	 * GPY5[3]	EBI_DATA[3](2)
	 * GPY5[4]	EBI_DATA[4](2)
	 * GPY5[5]	EBI_DATA[5](2)
	 * GPY5[6]	EBI_DATA[6](2)
	 * GPY5[7]	EBI_DATA[7](2)
	 *
	 * GPY6[0]	EBI_DATA[8](2)
	 * GPY6[1]	EBI_DATA[9](2)
	 * GPY6[2]	EBI_DATA[10](2)
	 * GPY6[3]	EBI_DATA[11](2)
	 * GPY6[4]	EBI_DATA[12](2)
	 * GPY6[5]	EBI_DATA[13](2)
	 * GPY6[6]	EBI_DATA[14](2)
	 * GPY6[7]	EBI_DATA[15](2)
	 */
	for (i = 0; i < 8; i++) {
		gpio_cfg_pin(EXYNOS5_GPIO_Y30 + i, S5P_GPIO_FUNC(2));
		gpio_set_pull(EXYNOS5_GPIO_Y30 + i, S5P_GPIO_PULL_UP);

		gpio_cfg_pin(EXYNOS5_GPIO_Y50 + i, S5P_GPIO_FUNC(2));
		gpio_set_pull(EXYNOS5_GPIO_Y50 + i, S5P_GPIO_PULL_UP);

		gpio_cfg_pin(EXYNOS5_GPIO_Y60 + i, S5P_GPIO_FUNC(2));
		gpio_set_pull(EXYNOS5_GPIO_Y60 + i, S5P_GPIO_PULL_UP);
	}
}

static void exynos5_i2c_config(int peripheral, int flags)
{
	switch (peripheral) {
	case PERIPH_ID_I2C0:
		gpio_cfg_pin(EXYNOS5_GPIO_B30, S5P_GPIO_FUNC(0x2));
		gpio_cfg_pin(EXYNOS5_GPIO_B31, S5P_GPIO_FUNC(0x2));
		break;
	case PERIPH_ID_I2C1:
		gpio_cfg_pin(EXYNOS5_GPIO_B32, S5P_GPIO_FUNC(0x2));
		gpio_cfg_pin(EXYNOS5_GPIO_B33, S5P_GPIO_FUNC(0x2));
		break;
	case PERIPH_ID_I2C2:
		gpio_cfg_pin(EXYNOS5_GPIO_A06, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS5_GPIO_A07, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C3:
		gpio_cfg_pin(EXYNOS5_GPIO_A12, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS5_GPIO_A13, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C4:
		gpio_cfg_pin(EXYNOS5_GPIO_A20, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS5_GPIO_A21, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C5:
		gpio_cfg_pin(EXYNOS5_GPIO_A22, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS5_GPIO_A23, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C6:
		gpio_cfg_pin(EXYNOS5_GPIO_B13, S5P_GPIO_FUNC(0x4));
		gpio_cfg_pin(EXYNOS5_GPIO_B14, S5P_GPIO_FUNC(0x4));
		break;
	case PERIPH_ID_I2C7:
		gpio_cfg_pin(EXYNOS5_GPIO_B22, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS5_GPIO_B23, S5P_GPIO_FUNC(0x3));
		break;
	}
}

static void exynos5420_i2c_config(int peripheral)
{
	switch (peripheral) {
	case PERIPH_ID_I2C0:
		gpio_cfg_pin(EXYNOS5420_GPIO_B30, S5P_GPIO_FUNC(0x2));
		gpio_cfg_pin(EXYNOS5420_GPIO_B31, S5P_GPIO_FUNC(0x2));
		break;
	case PERIPH_ID_I2C1:
		gpio_cfg_pin(EXYNOS5420_GPIO_B32, S5P_GPIO_FUNC(0x2));
		gpio_cfg_pin(EXYNOS5420_GPIO_B33, S5P_GPIO_FUNC(0x2));
		break;
	case PERIPH_ID_I2C2:
		gpio_cfg_pin(EXYNOS5420_GPIO_A06, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS5420_GPIO_A07, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C3:
		gpio_cfg_pin(EXYNOS5420_GPIO_A12, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS5420_GPIO_A13, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C4:
		gpio_cfg_pin(EXYNOS5420_GPIO_A20, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS5420_GPIO_A21, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C5:
		gpio_cfg_pin(EXYNOS5420_GPIO_A22, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS5420_GPIO_A23, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C6:
		gpio_cfg_pin(EXYNOS5420_GPIO_B13, S5P_GPIO_FUNC(0x4));
		gpio_cfg_pin(EXYNOS5420_GPIO_B14, S5P_GPIO_FUNC(0x4));
		break;
	case PERIPH_ID_I2C7:
		gpio_cfg_pin(EXYNOS5420_GPIO_B22, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS5420_GPIO_B23, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C8:
		gpio_cfg_pin(EXYNOS5420_GPIO_B34, S5P_GPIO_FUNC(0x2));
		gpio_cfg_pin(EXYNOS5420_GPIO_B35, S5P_GPIO_FUNC(0x2));
		break;
	case PERIPH_ID_I2C9:
		gpio_cfg_pin(EXYNOS5420_GPIO_B36, S5P_GPIO_FUNC(0x2));
		gpio_cfg_pin(EXYNOS5420_GPIO_B37, S5P_GPIO_FUNC(0x2));
		break;
	case PERIPH_ID_I2C10:
		gpio_cfg_pin(EXYNOS5420_GPIO_B40, S5P_GPIO_FUNC(0x2));
		gpio_cfg_pin(EXYNOS5420_GPIO_B41, S5P_GPIO_FUNC(0x2));
		break;
	}
}

static void exynos5_i2s_config(int peripheral)
{
	int i;

	switch (peripheral) {
	case PERIPH_ID_I2S0:
		for (i = 0; i < 5; i++)
			gpio_cfg_pin(EXYNOS5_GPIO_Z0 + i, S5P_GPIO_FUNC(0x02));
		break;
	case PERIPH_ID_I2S1:
		for (i = 0; i < 5; i++)
			gpio_cfg_pin(EXYNOS5_GPIO_B00 + i, S5P_GPIO_FUNC(0x02));
		break;
	}
}

void exynos5_spi_config(int peripheral)
{
	int cfg = 0, pin = 0, i;

	switch (peripheral) {
	case PERIPH_ID_SPI0:
		cfg = S5P_GPIO_FUNC(0x2);
		pin = EXYNOS5_GPIO_A20;
		break;
	case PERIPH_ID_SPI1:
		cfg = S5P_GPIO_FUNC(0x2);
		pin = EXYNOS5_GPIO_A24;
		break;
	case PERIPH_ID_SPI2:
		cfg = S5P_GPIO_FUNC(0x5);
		pin = EXYNOS5_GPIO_B11;
		break;
	case PERIPH_ID_SPI3:
		cfg = S5P_GPIO_FUNC(0x2);
		pin = EXYNOS5_GPIO_F10;
		break;
	case PERIPH_ID_SPI4:
		for (i = 0; i < 2; i++) {
			gpio_cfg_pin(EXYNOS5_GPIO_F02 + i, S5P_GPIO_FUNC(0x4));
			gpio_cfg_pin(EXYNOS5_GPIO_E04 + i, S5P_GPIO_FUNC(0x4));
		}
		break;
	}
	if (peripheral != PERIPH_ID_SPI4) {
		for (i = pin; i < pin + 4; i++)
			gpio_cfg_pin(i, cfg);
	}
}

void exynos5420_spi_config(int peripheral)
{
	int cfg, pin, i;

	switch (peripheral) {
	case PERIPH_ID_SPI0:
		pin = EXYNOS5420_GPIO_A20;
		cfg = S5P_GPIO_FUNC(0x2);
		break;
	case PERIPH_ID_SPI1:
		pin = EXYNOS5420_GPIO_A24;
		cfg = S5P_GPIO_FUNC(0x2);
		break;
	case PERIPH_ID_SPI2:
		pin = EXYNOS5420_GPIO_B11;
		cfg = S5P_GPIO_FUNC(0x5);
		break;
	case PERIPH_ID_SPI3:
		pin = EXYNOS5420_GPIO_F10;
		cfg = S5P_GPIO_FUNC(0x2);
		break;
	case PERIPH_ID_SPI4:
		cfg = 0;
		pin = 0;
		break;
	default:
		cfg = 0;
		pin = 0;
		debug("%s: invalid peripheral %d", __func__, peripheral);
		return;
	}

	if (peripheral != PERIPH_ID_SPI4) {
		for (i = pin; i < pin + 4; i++)
			gpio_cfg_pin(i, cfg);
	} else {
		for (i = 0; i < 2; i++) {
			gpio_cfg_pin(EXYNOS5420_GPIO_F02 + i,
				     S5P_GPIO_FUNC(0x4));
			gpio_cfg_pin(EXYNOS5420_GPIO_E04 + i,
				     S5P_GPIO_FUNC(0x4));
		}
	}
}

static int exynos5_pinmux_config(int peripheral, int flags)
{
	switch (peripheral) {
	case PERIPH_ID_UART0:
	case PERIPH_ID_UART1:
	case PERIPH_ID_UART2:
	case PERIPH_ID_UART3:
		exynos5_uart_config(peripheral);
		break;
	case PERIPH_ID_SDMMC0:
	case PERIPH_ID_SDMMC1:
	case PERIPH_ID_SDMMC2:
	case PERIPH_ID_SDMMC3:
		return exynos5_mmc_config(peripheral, flags);
	case PERIPH_ID_SROMC:
		exynos5_sromc_config(flags);
		break;
	case PERIPH_ID_I2C0:
	case PERIPH_ID_I2C1:
	case PERIPH_ID_I2C2:
	case PERIPH_ID_I2C3:
	case PERIPH_ID_I2C4:
	case PERIPH_ID_I2C5:
	case PERIPH_ID_I2C6:
	case PERIPH_ID_I2C7:
		exynos5_i2c_config(peripheral, flags);
		break;
	case PERIPH_ID_I2S0:
	case PERIPH_ID_I2S1:
		exynos5_i2s_config(peripheral);
		break;
	case PERIPH_ID_SPI0:
	case PERIPH_ID_SPI1:
	case PERIPH_ID_SPI2:
	case PERIPH_ID_SPI3:
	case PERIPH_ID_SPI4:
		exynos5_spi_config(peripheral);
		break;
	default:
		debug("%s: invalid peripheral %d", __func__, peripheral);
		return -1;
	}

	return 0;
}

static int exynos5420_pinmux_config(int peripheral, int flags)
{
	switch (peripheral) {
	case PERIPH_ID_UART0:
	case PERIPH_ID_UART1:
	case PERIPH_ID_UART2:
	case PERIPH_ID_UART3:
		exynos5420_uart_config(peripheral);
		break;
	case PERIPH_ID_SDMMC0:
	case PERIPH_ID_SDMMC1:
	case PERIPH_ID_SDMMC2:
	case PERIPH_ID_SDMMC3:
		return exynos5420_mmc_config(peripheral, flags);
	case PERIPH_ID_SPI0:
	case PERIPH_ID_SPI1:
	case PERIPH_ID_SPI2:
	case PERIPH_ID_SPI3:
	case PERIPH_ID_SPI4:
		exynos5420_spi_config(peripheral);
		break;
	case PERIPH_ID_I2C0:
	case PERIPH_ID_I2C1:
	case PERIPH_ID_I2C2:
	case PERIPH_ID_I2C3:
	case PERIPH_ID_I2C4:
	case PERIPH_ID_I2C5:
	case PERIPH_ID_I2C6:
	case PERIPH_ID_I2C7:
	case PERIPH_ID_I2C8:
	case PERIPH_ID_I2C9:
	case PERIPH_ID_I2C10:
		exynos5420_i2c_config(peripheral);
		break;
	default:
		debug("%s: invalid peripheral %d", __func__, peripheral);
		return -1;
	}

	return 0;
}

static void exynos4_i2c_config(int peripheral, int flags)
{
	switch (peripheral) {
	case PERIPH_ID_I2C0:
		gpio_cfg_pin(EXYNOS4_GPIO_D10, S5P_GPIO_FUNC(0x2));
		gpio_cfg_pin(EXYNOS4_GPIO_D11, S5P_GPIO_FUNC(0x2));
		break;
	case PERIPH_ID_I2C1:
		gpio_cfg_pin(EXYNOS4_GPIO_D12, S5P_GPIO_FUNC(0x2));
		gpio_cfg_pin(EXYNOS4_GPIO_D13, S5P_GPIO_FUNC(0x2));
		break;
	case PERIPH_ID_I2C2:
		gpio_cfg_pin(EXYNOS4_GPIO_A06, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS4_GPIO_A07, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C3:
		gpio_cfg_pin(EXYNOS4_GPIO_A12, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS4_GPIO_A13, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C4:
		gpio_cfg_pin(EXYNOS4_GPIO_B2, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS4_GPIO_B3, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C5:
		gpio_cfg_pin(EXYNOS4_GPIO_B6, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS4_GPIO_B7, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C6:
		gpio_cfg_pin(EXYNOS4_GPIO_C13, S5P_GPIO_FUNC(0x4));
		gpio_cfg_pin(EXYNOS4_GPIO_C14, S5P_GPIO_FUNC(0x4));
		break;
	case PERIPH_ID_I2C7:
		gpio_cfg_pin(EXYNOS4_GPIO_D02, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS4_GPIO_D03, S5P_GPIO_FUNC(0x3));
		break;
	}
}

static int exynos4_mmc_config(int peripheral, int flags)
{
	int i, start = 0, start_ext = 0;

	switch (peripheral) {
	case PERIPH_ID_SDMMC0:
		start = EXYNOS4_GPIO_K00;
		start_ext = EXYNOS4_GPIO_K13;
		break;
	case PERIPH_ID_SDMMC2:
		start = EXYNOS4_GPIO_K20;
		start_ext = EXYNOS4_GPIO_K33;
		break;
	default:
		return -1;
	}
	for (i = start; i < (start + 7); i++) {
		if (i == (start + 2))
			continue;
		gpio_cfg_pin(i,  S5P_GPIO_FUNC(0x2));
		gpio_set_pull(i, S5P_GPIO_PULL_NONE);
		gpio_set_drv(i, S5P_GPIO_DRV_4X);
	}
	if (flags & PINMUX_FLAG_8BIT_MODE) {
		for (i = start_ext; i < (start_ext + 4); i++) {
			gpio_cfg_pin(i,  S5P_GPIO_FUNC(0x3));
			gpio_set_pull(i, S5P_GPIO_PULL_NONE);
			gpio_set_drv(i, S5P_GPIO_DRV_4X);
		}
	}

	return 0;
}

static void exynos4_uart_config(int peripheral)
{
	int i, start, count;

	switch (peripheral) {
	case PERIPH_ID_UART0:
		start = EXYNOS4_GPIO_A00;
		count = 4;
		break;
	case PERIPH_ID_UART1:
		start = EXYNOS4_GPIO_A04;
		count = 4;
		break;
	case PERIPH_ID_UART2:
		start = EXYNOS4_GPIO_A10;
		count = 4;
		break;
	case PERIPH_ID_UART3:
		start = EXYNOS4_GPIO_A14;
		count = 2;
		break;
	default:
		debug("%s: invalid peripheral %d", __func__, peripheral);
		return;
	}
	for (i = start; i < (start + count); i++) {
		gpio_set_pull(i, S5P_GPIO_PULL_NONE);
		gpio_cfg_pin(i, S5P_GPIO_FUNC(0x2));
	}
}

static void exynos4x12_i2c_config(int peripheral, int flags)
{
	switch (peripheral) {
	case PERIPH_ID_I2C0:
		gpio_cfg_pin(EXYNOS4X12_GPIO_D10, S5P_GPIO_FUNC(0x2));
		gpio_cfg_pin(EXYNOS4X12_GPIO_D11, S5P_GPIO_FUNC(0x2));
		break;
	case PERIPH_ID_I2C1:
		gpio_cfg_pin(EXYNOS4X12_GPIO_D12, S5P_GPIO_FUNC(0x2));
		gpio_cfg_pin(EXYNOS4X12_GPIO_D13, S5P_GPIO_FUNC(0x2));
		break;
	case PERIPH_ID_I2C2:
		gpio_cfg_pin(EXYNOS4X12_GPIO_A06, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS4X12_GPIO_A07, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C3:
		gpio_cfg_pin(EXYNOS4X12_GPIO_A12, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS4X12_GPIO_A13, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C4:
		gpio_cfg_pin(EXYNOS4X12_GPIO_B2, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS4X12_GPIO_B3, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C5:
		gpio_cfg_pin(EXYNOS4X12_GPIO_B6, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS4X12_GPIO_B7, S5P_GPIO_FUNC(0x3));
		break;
	case PERIPH_ID_I2C6:
		gpio_cfg_pin(EXYNOS4X12_GPIO_C13, S5P_GPIO_FUNC(0x4));
		gpio_cfg_pin(EXYNOS4X12_GPIO_C14, S5P_GPIO_FUNC(0x4));
		break;
	case PERIPH_ID_I2C7:
		gpio_cfg_pin(EXYNOS4X12_GPIO_D02, S5P_GPIO_FUNC(0x3));
		gpio_cfg_pin(EXYNOS4X12_GPIO_D03, S5P_GPIO_FUNC(0x3));
		break;
	}
}

static int exynos4x12_mmc_config(int peripheral, int flags)
{
	int i, start = 0, start_ext = 0;

	switch (peripheral) {
	case PERIPH_ID_SDMMC0:
		start = EXYNOS4X12_GPIO_K00;
		start_ext = EXYNOS4X12_GPIO_K13;
		break;
	case PERIPH_ID_SDMMC2:
		start = EXYNOS4X12_GPIO_K20;
		start_ext = EXYNOS4X12_GPIO_K33;
		break;
	default:
		return -1;
	}
	for (i = start; i < (start + 7); i++) {
		if (i == (start + 2))
			continue;
		gpio_cfg_pin(i,  S5P_GPIO_FUNC(0x2));
		gpio_set_pull(i, S5P_GPIO_PULL_NONE);
		gpio_set_drv(i, S5P_GPIO_DRV_4X);
	}
	if (flags & PINMUX_FLAG_8BIT_MODE) {
		for (i = start_ext; i < (start_ext + 4); i++) {
			gpio_cfg_pin(i,  S5P_GPIO_FUNC(0x3));
			gpio_set_pull(i, S5P_GPIO_PULL_NONE);
			gpio_set_drv(i, S5P_GPIO_DRV_4X);
		}
	}

	return 0;
}

static void exynos4x12_uart_config(int peripheral)
{
	int i, start, count;

	switch (peripheral) {
	case PERIPH_ID_UART0:
		start = EXYNOS4X12_GPIO_A00;
		count = 4;
		break;
	case PERIPH_ID_UART1:
		start = EXYNOS4X12_GPIO_A04;
		count = 4;
		break;
	case PERIPH_ID_UART2:
		start = EXYNOS4X12_GPIO_A10;
		count = 4;
		break;
	case PERIPH_ID_UART3:
		start = EXYNOS4X12_GPIO_A14;
		count = 2;
		break;
	default:
		debug("%s: invalid peripheral %d", __func__, peripheral);
		return;
	}
	for (i = start; i < (start + count); i++) {
		gpio_set_pull(i, S5P_GPIO_PULL_NONE);
		gpio_cfg_pin(i, S5P_GPIO_FUNC(0x2));
	}
}

static int exynos4_pinmux_config(int peripheral, int flags)
{
	switch (peripheral) {
	case PERIPH_ID_UART0:
	case PERIPH_ID_UART1:
	case PERIPH_ID_UART2:
	case PERIPH_ID_UART3:
		exynos4_uart_config(peripheral);
		break;
	case PERIPH_ID_I2C0:
	case PERIPH_ID_I2C1:
	case PERIPH_ID_I2C2:
	case PERIPH_ID_I2C3:
	case PERIPH_ID_I2C4:
	case PERIPH_ID_I2C5:
	case PERIPH_ID_I2C6:
	case PERIPH_ID_I2C7:
		exynos4_i2c_config(peripheral, flags);
		break;
	case PERIPH_ID_SDMMC0:
	case PERIPH_ID_SDMMC2:
		return exynos4_mmc_config(peripheral, flags);
	case PERIPH_ID_SDMMC1:
	case PERIPH_ID_SDMMC3:
	case PERIPH_ID_SDMMC4:
		debug("SDMMC device %d not implemented\n", peripheral);
		return -1;
	default:
		debug("%s: invalid peripheral %d", __func__, peripheral);
		return -1;
	}

	return 0;
}

static int exynos4x12_pinmux_config(int peripheral, int flags)
{
	switch (peripheral) {
	case PERIPH_ID_UART0:
	case PERIPH_ID_UART1:
	case PERIPH_ID_UART2:
	case PERIPH_ID_UART3:
		exynos4x12_uart_config(peripheral);
		break;
	case PERIPH_ID_I2C0:
	case PERIPH_ID_I2C1:
	case PERIPH_ID_I2C2:
	case PERIPH_ID_I2C3:
	case PERIPH_ID_I2C4:
	case PERIPH_ID_I2C5:
	case PERIPH_ID_I2C6:
	case PERIPH_ID_I2C7:
		exynos4x12_i2c_config(peripheral, flags);
		break;
	case PERIPH_ID_SDMMC0:
	case PERIPH_ID_SDMMC2:
		return exynos4x12_mmc_config(peripheral, flags);
	case PERIPH_ID_SDMMC1:
	case PERIPH_ID_SDMMC3:
	case PERIPH_ID_SDMMC4:
		debug("SDMMC device %d not implemented\n", peripheral);
		return -1;
	default:
		debug("%s: invalid peripheral %d", __func__, peripheral);
		return -1;
	}

	return 0;
}

int exynos_pinmux_config(int peripheral, int flags)
{
	if (cpu_is_exynos5()) {
		if (proid_is_exynos5420())
			return exynos5420_pinmux_config(peripheral, flags);
		else if (proid_is_exynos5250())
			return exynos5_pinmux_config(peripheral, flags);
	} else if (cpu_is_exynos4()) {
		if (proid_is_exynos4412())
			return exynos4x12_pinmux_config(peripheral, flags);
		else
			return exynos4_pinmux_config(peripheral, flags);
	}

	debug("pinmux functionality not supported\n");

	return -1;
}

#ifdef CONFIG_OF_CONTROL
static int exynos4_pinmux_decode_periph_id(const void *blob, int node)
{
	int err;
	u32 cell[3];

	err = fdtdec_get_int_array(blob, node, "interrupts", cell,
					ARRAY_SIZE(cell));
	if (err) {
		debug(" invalid peripheral id\n");
		return PERIPH_ID_NONE;
	}

	return cell[1];
}

static int exynos5_pinmux_decode_periph_id(const void *blob, int node)
{
	int err;
	u32 cell[3];

	err = fdtdec_get_int_array(blob, node, "interrupts", cell,
					ARRAY_SIZE(cell));
	if (err)
		return PERIPH_ID_NONE;

	return cell[1];
}

int pinmux_decode_periph_id(const void *blob, int node)
{
	if (cpu_is_exynos5())
		return  exynos5_pinmux_decode_periph_id(blob, node);
	else if (cpu_is_exynos4())
		return  exynos4_pinmux_decode_periph_id(blob, node);

	return PERIPH_ID_NONE;
}
#endif