board/aristainetos/aristainetos.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2014
 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
 *
 * Based on:
 * Copyright (C) 2012 Freescale Semiconductor, Inc.
 *
 * Author: Fabio Estevam <fabio.estevam@freescale.com>
 */

#include <asm/arch/clock.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/iomux.h>
#include <asm/arch/mx6-pins.h>
#include <linux/errno.h>
#include <asm/gpio.h>
#include <asm/mach-imx/iomux-v3.h>
#include <asm/mach-imx/boot_mode.h>
#include <asm/mach-imx/mxc_i2c.h>
#include <asm/mach-imx/video.h>
#include <asm/arch/crm_regs.h>
#include <asm/io.h>
#include <asm/arch/sys_proto.h>
#include <bmp_logo.h>
#include <pwm.h>
#include <dm/root.h>
#include <env.h>
#include <micrel.h>
#include <miiphy.h>
#include <lcd.h>
#include <led.h>
#include <splash.h>
#include <video_fb.h>

DECLARE_GLOBAL_DATA_PTR;

#define I2C_PAD_CTRL	(PAD_CTL_PUS_100K_UP |			\
	PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | PAD_CTL_HYS |	\
	PAD_CTL_ODE | PAD_CTL_SRE_FAST)

#define PC MUX_PAD_CTRL(I2C_PAD_CTRL)

enum {
	BOARD_TYPE_4 = 4,
	BOARD_TYPE_7 = 7,
};

#define ARI_BT_4 "aristainetos2_4@2"
#define ARI_BT_7 "aristainetos2_7@1"

struct i2c_pads_info i2c_pad_info3 = {
	.scl = {
		.i2c_mode = MX6_PAD_GPIO_5__I2C3_SCL | PC,
		.gpio_mode = MX6_PAD_GPIO_5__GPIO1_IO05 | PC,
		.gp = IMX_GPIO_NR(1, 5)
	},
	.sda = {
		.i2c_mode = MX6_PAD_GPIO_6__I2C3_SDA | PC,
		.gpio_mode = MX6_PAD_GPIO_6__GPIO1_IO06 | PC,
		.gp = IMX_GPIO_NR(1, 6)
	}
};

struct i2c_pads_info i2c_pad_info4 = {
	.scl = {
		.i2c_mode = MX6_PAD_GPIO_7__I2C4_SCL | PC,
		.gpio_mode = MX6_PAD_GPIO_7__GPIO1_IO07 | PC,
		.gp = IMX_GPIO_NR(1, 7)
	},
	.sda = {
		.i2c_mode = MX6_PAD_GPIO_8__I2C4_SDA | PC,
		.gpio_mode = MX6_PAD_GPIO_8__GPIO1_IO08 | PC,
		.gp = IMX_GPIO_NR(1, 8)
	}
};

static iomux_v3_cfg_t const backlight_pads[] = {
	/* backlight PWM brightness control */
	MX6_PAD_GPIO_9__PWM1_OUT | MUX_PAD_CTRL(NO_PAD_CTRL),
	/* backlight enable */
	MX6_PAD_EIM_BCLK__GPIO6_IO31 | MUX_PAD_CTRL(NO_PAD_CTRL),
	/* LCD power enable */
	MX6_PAD_NANDF_CS2__GPIO6_IO15 | MUX_PAD_CTRL(NO_PAD_CTRL),
};

int board_phy_config(struct phy_device *phydev)
{
	/* control data pad skew - devaddr = 0x02, register = 0x04 */
	ksz9031_phy_extended_write(phydev, 0x02,
				   MII_KSZ9031_EXT_RGMII_CTRL_SIG_SKEW,
				   MII_KSZ9031_MOD_DATA_NO_POST_INC, 0x0000);
	/* rx data pad skew - devaddr = 0x02, register = 0x05 */
	ksz9031_phy_extended_write(phydev, 0x02,
				   MII_KSZ9031_EXT_RGMII_RX_DATA_SKEW,
				   MII_KSZ9031_MOD_DATA_NO_POST_INC, 0x0000);
	/* tx data pad skew - devaddr = 0x02, register = 0x06 */
	ksz9031_phy_extended_write(phydev, 0x02,
				   MII_KSZ9031_EXT_RGMII_TX_DATA_SKEW,
				   MII_KSZ9031_MOD_DATA_NO_POST_INC, 0x0000);
	/* gtx and rx clock pad skew - devaddr = 0x02, register = 0x08 */
	ksz9031_phy_extended_write(phydev, 0x02,
				   MII_KSZ9031_EXT_RGMII_CLOCK_SKEW,
				   MII_KSZ9031_MOD_DATA_NO_POST_INC, 0x03FF);

	if (phydev->drv->config)
		phydev->drv->config(phydev);

	return 0;
}

static int rotate_logo_one(unsigned char *out, unsigned char *in)
{
	int   i, j;

	for (i = 0; i < BMP_LOGO_WIDTH; i++)
		for (j = 0; j < BMP_LOGO_HEIGHT; j++)
			out[j * BMP_LOGO_WIDTH + BMP_LOGO_HEIGHT - 1 - i] =
			in[i * BMP_LOGO_WIDTH + j];
	return 0;
}

/*
 * Rotate the BMP_LOGO (only)
 * Will only work, if the logo is square, as
 * BMP_LOGO_HEIGHT and BMP_LOGO_WIDTH are defines, not variables
 */
void rotate_logo(int rotations)
{
	unsigned char out_logo[BMP_LOGO_WIDTH * BMP_LOGO_HEIGHT];
	struct bmp_header *header;
	unsigned char *in_logo;
	int   i, j;

	if (BMP_LOGO_WIDTH != BMP_LOGO_HEIGHT)
		return;

	header = (struct bmp_header *)bmp_logo_bitmap;
	in_logo = bmp_logo_bitmap + header->data_offset;

	/* one 90 degree rotation */
	if (rotations == 1  ||  rotations == 2  ||  rotations == 3)
		rotate_logo_one(out_logo, in_logo);

	/* second 90 degree rotation */
	if (rotations == 2  ||  rotations == 3)
		rotate_logo_one(in_logo, out_logo);

	/* third 90 degree rotation */
	if (rotations == 3)
		rotate_logo_one(out_logo, in_logo);

	/* copy result back to original array */
	if (rotations == 1  ||  rotations == 3)
		for (i = 0; i < BMP_LOGO_WIDTH; i++)
			for (j = 0; j < BMP_LOGO_HEIGHT; j++)
				in_logo[i * BMP_LOGO_WIDTH + j] =
				out_logo[i * BMP_LOGO_WIDTH + j];
}

static void enable_lvds(struct display_info_t const *dev)
{
	struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
	struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
	int reg;
	s32 timeout = 100000;

	/* set PLL5 clock */
	reg = readl(&ccm->analog_pll_video);
	reg |= BM_ANADIG_PLL_VIDEO_POWERDOWN;
	writel(reg, &ccm->analog_pll_video);

	/* set PLL5 to 232720000Hz */
	reg &= ~BM_ANADIG_PLL_VIDEO_DIV_SELECT;
	reg |= BF_ANADIG_PLL_VIDEO_DIV_SELECT(0x26);
	reg &= ~BM_ANADIG_PLL_VIDEO_POST_DIV_SELECT;
	reg |= BF_ANADIG_PLL_VIDEO_POST_DIV_SELECT(0);
	writel(reg, &ccm->analog_pll_video);

	writel(BF_ANADIG_PLL_VIDEO_NUM_A(0xC0238),
	       &ccm->analog_pll_video_num);
	writel(BF_ANADIG_PLL_VIDEO_DENOM_B(0xF4240),
	       &ccm->analog_pll_video_denom);

	reg &= ~BM_ANADIG_PLL_VIDEO_POWERDOWN;
	writel(reg, &ccm->analog_pll_video);

	while (timeout--)
		if (readl(&ccm->analog_pll_video) & BM_ANADIG_PLL_VIDEO_LOCK)
			break;
	if (timeout < 0)
		printf("Warning: video pll lock timeout!\n");

	reg = readl(&ccm->analog_pll_video);
	reg |= BM_ANADIG_PLL_VIDEO_ENABLE;
	reg &= ~BM_ANADIG_PLL_VIDEO_BYPASS;
	writel(reg, &ccm->analog_pll_video);

	/* set LDB0, LDB1 clk select to 000/000 (PLL5 clock) */
	reg = readl(&ccm->cs2cdr);
	reg &= ~(MXC_CCM_CS2CDR_LDB_DI0_CLK_SEL_MASK
		 | MXC_CCM_CS2CDR_LDB_DI1_CLK_SEL_MASK);
	reg |= (0 << MXC_CCM_CS2CDR_LDB_DI0_CLK_SEL_OFFSET)
		| (0 << MXC_CCM_CS2CDR_LDB_DI1_CLK_SEL_OFFSET);
	writel(reg, &ccm->cs2cdr);

	reg = readl(&ccm->cscmr2);
	reg |= MXC_CCM_CSCMR2_LDB_DI0_IPU_DIV;
	writel(reg, &ccm->cscmr2);

	reg = readl(&ccm->chsccdr);
	reg |= (CHSCCDR_CLK_SEL_LDB_DI0
		<< MXC_CCM_CHSCCDR_IPU1_DI0_CLK_SEL_OFFSET);
	writel(reg, &ccm->chsccdr);

	reg = IOMUXC_GPR2_BGREF_RRMODE_EXTERNAL_RES
	      | IOMUXC_GPR2_DI1_VS_POLARITY_ACTIVE_HIGH
	      | IOMUXC_GPR2_DI0_VS_POLARITY_ACTIVE_HIGH
	      | IOMUXC_GPR2_BIT_MAPPING_CH0_SPWG
	      | IOMUXC_GPR2_DATA_WIDTH_CH0_24BIT
	      | IOMUXC_GPR2_LVDS_CH1_MODE_DISABLED
	      | IOMUXC_GPR2_LVDS_CH0_MODE_ENABLED_DI0;
	writel(reg, &iomux->gpr[2]);

	reg = readl(&iomux->gpr[3]);
	reg = (reg & ~IOMUXC_GPR3_LVDS0_MUX_CTL_MASK)
	       | (IOMUXC_GPR3_MUX_SRC_IPU1_DI0
		  << IOMUXC_GPR3_LVDS0_MUX_CTL_OFFSET);
	writel(reg, &iomux->gpr[3]);
}

static void enable_spi_display(struct display_info_t const *dev)
{
	struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
	struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
	int reg;
	s32 timeout = 100000;

#if defined(CONFIG_VIDEO_BMP_LOGO)
	rotate_logo(3);  /* portrait display in landscape mode */
#endif

	reg = readl(&ccm->cs2cdr);

	/* select pll 5 clock */
	reg &= ~(MXC_CCM_CS2CDR_LDB_DI0_CLK_SEL_MASK
		| MXC_CCM_CS2CDR_LDB_DI1_CLK_SEL_MASK);
	writel(reg, &ccm->cs2cdr);

	/* set PLL5 to 197994996Hz */
	reg &= ~BM_ANADIG_PLL_VIDEO_DIV_SELECT;
	reg |= BF_ANADIG_PLL_VIDEO_DIV_SELECT(0x21);
	reg &= ~BM_ANADIG_PLL_VIDEO_POST_DIV_SELECT;
	reg |= BF_ANADIG_PLL_VIDEO_POST_DIV_SELECT(0);
	writel(reg, &ccm->analog_pll_video);

	writel(BF_ANADIG_PLL_VIDEO_NUM_A(0xfbf4),
	       &ccm->analog_pll_video_num);
	writel(BF_ANADIG_PLL_VIDEO_DENOM_B(0xf4240),
	       &ccm->analog_pll_video_denom);

	reg &= ~BM_ANADIG_PLL_VIDEO_POWERDOWN;
	writel(reg, &ccm->analog_pll_video);

	while (timeout--)
		if (readl(&ccm->analog_pll_video) & BM_ANADIG_PLL_VIDEO_LOCK)
			break;
	if (timeout < 0)
		printf("Warning: video pll lock timeout!\n");

	reg = readl(&ccm->analog_pll_video);
	reg |= BM_ANADIG_PLL_VIDEO_ENABLE;
	reg &= ~BM_ANADIG_PLL_VIDEO_BYPASS;
	writel(reg, &ccm->analog_pll_video);

	/* set LDB0, LDB1 clk select to 000/000 (PLL5 clock) */
	reg = readl(&ccm->cs2cdr);
	reg &= ~(MXC_CCM_CS2CDR_LDB_DI0_CLK_SEL_MASK
		 | MXC_CCM_CS2CDR_LDB_DI1_CLK_SEL_MASK);
	reg |= (0 << MXC_CCM_CS2CDR_LDB_DI0_CLK_SEL_OFFSET)
		| (0 << MXC_CCM_CS2CDR_LDB_DI1_CLK_SEL_OFFSET);
	writel(reg, &ccm->cs2cdr);

	reg = readl(&ccm->cscmr2);
	reg |= MXC_CCM_CSCMR2_LDB_DI0_IPU_DIV;
	writel(reg, &ccm->cscmr2);

	reg = readl(&ccm->chsccdr);
	reg |= (CHSCCDR_CLK_SEL_LDB_DI0
		<< MXC_CCM_CHSCCDR_IPU1_DI0_CLK_SEL_OFFSET);
	reg &= ~MXC_CCM_CHSCCDR_IPU1_DI0_PODF_MASK;
	reg |= (2 << MXC_CCM_CHSCCDR_IPU1_DI0_PODF_OFFSET);
	reg &= ~MXC_CCM_CHSCCDR_IPU1_DI0_PRE_CLK_SEL_MASK;
	reg |= (2 << MXC_CCM_CHSCCDR_IPU1_DI0_PRE_CLK_SEL_OFFSET);
	writel(reg, &ccm->chsccdr);

	reg = IOMUXC_GPR2_BGREF_RRMODE_EXTERNAL_RES
	      | IOMUXC_GPR2_DI1_VS_POLARITY_ACTIVE_HIGH
	      | IOMUXC_GPR2_DI0_VS_POLARITY_ACTIVE_HIGH
	      | IOMUXC_GPR2_BIT_MAPPING_CH0_SPWG
	      | IOMUXC_GPR2_DATA_WIDTH_CH0_24BIT
	      | IOMUXC_GPR2_LVDS_CH1_MODE_DISABLED
	      | IOMUXC_GPR2_LVDS_CH0_MODE_ENABLED_DI0;
	writel(reg, &iomux->gpr[2]);

	reg = readl(&iomux->gpr[3]);
	reg = (reg & ~IOMUXC_GPR3_LVDS0_MUX_CTL_MASK)
	       | (IOMUXC_GPR3_MUX_SRC_IPU1_DI0
		  << IOMUXC_GPR3_LVDS0_MUX_CTL_OFFSET);
	writel(reg, &iomux->gpr[3]);
}

static void setup_display(void)
{
	enable_ipu_clock();
}

static void set_gpr_register(void)
{
	struct iomuxc *iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;

	writel(IOMUXC_GPR1_APP_CLK_REQ_N | IOMUXC_GPR1_PCIE_RDY_L23 |
	       IOMUXC_GPR1_EXC_MON_SLVE |
	       (2 << IOMUXC_GPR1_ADDRS0_OFFSET) |
	       IOMUXC_GPR1_ACT_CS0,
	       &iomuxc_regs->gpr[1]);
	writel(0x0, &iomuxc_regs->gpr[8]);
	writel(IOMUXC_GPR12_ARMP_IPG_CLK_EN | IOMUXC_GPR12_ARMP_AHB_CLK_EN |
	       IOMUXC_GPR12_ARMP_ATB_CLK_EN | IOMUXC_GPR12_ARMP_APB_CLK_EN,
	       &iomuxc_regs->gpr[12]);
}

extern char __bss_start[], __bss_end[];
int board_early_init_f(void)
{
	select_ldb_di_clock_source(MXC_PLL5_CLK);
	set_gpr_register();

	/*
	 * clear bss here, so we can use spi driver
	 * before relocation and read Environment
	 * from spi flash.
	 */
	memset(__bss_start, 0x00, __bss_end - __bss_start);

	return 0;
}

static void setup_i2c4(void)
{
	setup_i2c(3, CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE,
		  &i2c_pad_info4);
}

static void setup_one_led(char *label, int state)
{
	struct udevice *dev;
	int ret;

	ret = led_get_by_label(label, &dev);
	if (ret == 0)
		led_set_state(dev, state);
}

static void setup_board_gpio(void)
{
	setup_one_led("led_ena", LEDST_ON);
	/* switch off Status LEDs */
	setup_one_led("led_yellow", LEDST_OFF);
	setup_one_led("led_red", LEDST_OFF);
	setup_one_led("led_green", LEDST_OFF);
	setup_one_led("led_blue", LEDST_OFF);
}

int board_late_init(void)
{
	char *my_bootdelay;
	char bootmode = 0;
	struct gpio_desc *desc;
	int x, y;
	int ret;

	led_default_state();
	splash_get_pos(&x, &y);
	bmp_display((ulong)&bmp_logo_bitmap[0], x, y);
	/*
	 * Check the boot-source. If booting from NOR Flash,
	 * disable bootdelay
	 */
	desc = gpio_hog_lookup_name("bootsel0");
	if (desc)
		bootmode |= (dm_gpio_get_value(desc) ? 1 : 0) << 0;
	desc = gpio_hog_lookup_name("bootsel1");
	if (desc)
		bootmode |= (dm_gpio_get_value(desc) ? 1 : 0) << 1;
	desc = gpio_hog_lookup_name("bootsel2");
	if (desc)
		bootmode |= (dm_gpio_get_value(desc) ? 1 : 0) << 2;

	if (bootmode == 7) {
		my_bootdelay = env_get("nor_bootdelay");
		if (my_bootdelay != NULL)
			env_set("bootdelay", my_bootdelay);
		else
			env_set("bootdelay", "-2");
	}

	/* read out some jumper values*/
	ret = gpio_hog_lookup_name("env_reset", &desc);
	if (!ret) {
		if (dm_gpio_get_value(desc)) {
			printf("\nClear env (set back to defaults)\n");
			run_command("run default_env; saveenv; saveenv", 0);
		}
	}
	ret = gpio_hog_lookup_name("boot_rescue", &desc);
	if (!ret) {
		if (dm_gpio_get_value(desc)) {
			aristainetos_run_rescue_command(16);
			run_command("run rescue_xload_boot", 0);
		}
	}

	/* set board_type */
	if (gd->board_type == BOARD_TYPE_4)
		env_set("board_type", ARI_BT_4);
	else
		env_set("board_type", ARI_BT_7);

	return 0;
}

struct i2c_pads_info i2c_pad_info1 = {
	.scl = {
		.i2c_mode = MX6_PAD_CSI0_DAT9__I2C1_SCL | PC,
		.gpio_mode = MX6_PAD_CSI0_DAT9__GPIO5_IO27 | PC,
		.gp = IMX_GPIO_NR(5, 27)
	},
	.sda = {
		.i2c_mode = MX6_PAD_CSI0_DAT8__I2C1_SDA | PC,
		.gpio_mode = MX6_PAD_CSI0_DAT8__GPIO5_IO26 | PC,
		.gp = IMX_GPIO_NR(5, 26)
	}
};

struct i2c_pads_info i2c_pad_info2 = {
	.scl = {
		.i2c_mode = MX6_PAD_KEY_COL3__I2C2_SCL | PC,
		.gpio_mode = MX6_PAD_KEY_COL3__GPIO4_IO12 | PC,
		.gp = IMX_GPIO_NR(4, 12)
	},
	.sda = {
		.i2c_mode = MX6_PAD_KEY_ROW3__I2C2_SDA | PC,
		.gpio_mode = MX6_PAD_KEY_ROW3__GPIO4_IO13 | PC,
		.gp = IMX_GPIO_NR(4, 13)
	}
};

int dram_init(void)
{
	gd->ram_size = imx_ddr_size();

	return 0;
}

struct display_info_t const displays[] = {
	{
		.bus	= -1,
		.addr	= 0,
		.pixfmt	= IPU_PIX_FMT_RGB24,
		.detect	= NULL,
		.enable	= enable_lvds,
		.mode	= {
			.name           = "lb07wv8",
			.refresh        = 60,
			.xres           = 800,
			.yres           = 480,
			.pixclock       = 30066,
			.left_margin    = 88,
			.right_margin   = 88,
			.upper_margin   = 20,
			.lower_margin   = 20,
			.hsync_len      = 80,
			.vsync_len      = 5,
			.sync           = FB_SYNC_EXT,
			.vmode          = FB_VMODE_NONINTERLACED
		}
	}
#if ((CONFIG_SYS_BOARD_VERSION == 2) || (CONFIG_SYS_BOARD_VERSION == 3))
	, {
		.bus	= -1,
		.addr	= 0,
		.pixfmt	= IPU_PIX_FMT_RGB24,
		.detect	= NULL,
		.enable	= enable_spi_display,
		.mode	= {
			.name           = "lg4573",
			.refresh        = 57,
			.xres           = 480,
			.yres           = 800,
			.pixclock       = 37037,
			.left_margin    = 59,
			.right_margin   = 10,
			.upper_margin   = 15,
			.lower_margin   = 15,
			.hsync_len      = 10,
			.vsync_len      = 15,
			.sync           = FB_SYNC_EXT | FB_SYNC_HOR_HIGH_ACT |
					  FB_SYNC_VERT_HIGH_ACT,
			.vmode          = FB_VMODE_NONINTERLACED
		}
	}
#endif
};
size_t display_count = ARRAY_SIZE(displays);

iomux_v3_cfg_t nfc_pads[] = {
	MX6_PAD_NANDF_CLE__NAND_CLE		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_ALE__NAND_ALE		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_WP_B__NAND_WP_B	| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_RB0__NAND_READY_B	| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_CS0__NAND_CE0_B		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_SD4_CMD__NAND_RE_B		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_SD4_CLK__NAND_WE_B		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_D0__NAND_DATA00		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_D1__NAND_DATA01		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_D2__NAND_DATA02		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_D3__NAND_DATA03		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_D4__NAND_DATA04		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_D5__NAND_DATA05		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_D6__NAND_DATA06		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_D7__NAND_DATA07		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_SD4_DAT0__NAND_DQS		| MUX_PAD_CTRL(NO_PAD_CTRL),
};

static void setup_gpmi_nand(void)
{
	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;

	/* config gpmi nand iomux */
	imx_iomux_v3_setup_multiple_pads(nfc_pads,
					 ARRAY_SIZE(nfc_pads));

	/* gate ENFC_CLK_ROOT clock first,before clk source switch */
	clrbits_le32(&mxc_ccm->CCGR2, MXC_CCM_CCGR2_IOMUX_IPT_CLK_IO_MASK);

	/* config gpmi and bch clock to 100 MHz */
	clrsetbits_le32(&mxc_ccm->cs2cdr,
			MXC_CCM_CS2CDR_ENFC_CLK_PODF_MASK |
			MXC_CCM_CS2CDR_ENFC_CLK_PRED_MASK |
			MXC_CCM_CS2CDR_ENFC_CLK_SEL_MASK,
			MXC_CCM_CS2CDR_ENFC_CLK_PODF(0) |
			MXC_CCM_CS2CDR_ENFC_CLK_PRED(3) |
			MXC_CCM_CS2CDR_ENFC_CLK_SEL(3));

	/* enable ENFC_CLK_ROOT clock */
	setbits_le32(&mxc_ccm->CCGR2, MXC_CCM_CCGR2_IOMUX_IPT_CLK_IO_MASK);

	/* enable gpmi and bch clock gating */
	setbits_le32(&mxc_ccm->CCGR4,
		     MXC_CCM_CCGR4_RAWNAND_U_BCH_INPUT_APB_MASK |
		     MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_BCH_MASK |
		     MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_GPMI_IO_MASK |
		     MXC_CCM_CCGR4_RAWNAND_U_GPMI_INPUT_APB_MASK |
		     MXC_CCM_CCGR4_PL301_MX6QPER1_BCH_OFFSET);

	/* enable apbh clock gating */
	setbits_le32(&mxc_ccm->CCGR0, MXC_CCM_CCGR0_APBHDMA_MASK);
}

int board_init(void)
{
	struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;

	/* address of boot parameters */
	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;

	setup_i2c(0, CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE,
		  &i2c_pad_info1);
	setup_i2c(1, CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE,
		  &i2c_pad_info2);
	setup_i2c(2, CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE,
		  &i2c_pad_info3);
	setup_i2c4();

	setup_board_gpio();
	setup_gpmi_nand();
	setup_display();

	/* GPIO_1 for USB_OTG_ID */
	clrsetbits_le32(&iomux->gpr[1], IOMUXC_GPR1_USB_OTG_ID_SEL_MASK, 0);
	return 0;
}

int checkboard(void)
{
	printf("Board: %s\n", CONFIG_BOARDNAME);
	return 0;
}

int board_fit_config_name_match(const char *name)
{
	if (gd->board_type == BOARD_TYPE_4 &&
	    strchr(name, 0x34))
		return 0;

	if (gd->board_type == BOARD_TYPE_7 &&
	    strchr(name, 0x37))
		return 0;

	return -1;
}

static void do_board_detect(void)
{
	int ret;
	char s[30];

	/* default use board type 7 */
	gd->board_type = BOARD_TYPE_7;
	if (env_init())
		return;

	ret = env_get_f("panel", s, sizeof(s));
	if (ret < 0)
		return;

	if (!strncmp("lg4573", s, 6))
		gd->board_type = BOARD_TYPE_4;
}

#ifdef CONFIG_DTB_RESELECT
int embedded_dtb_select(void)
{
	int rescan;

	do_board_detect();
	fdtdec_resetup(&rescan);

	return 0;
}
#endif