/*
 * Copyright (C) 2012 Freescale Semiconductor, Inc.
 *
 * Author: Fabio Estevam <fabio.estevam@freescale.com>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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; either version 2 of
 * the License, or (at your option) any later version.
 *
 * 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 <common.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/iomux.h>
#include <asm/arch/mx6x_pins.h>
#include <asm/errno.h>
#include <asm/gpio.h>
#include <asm/imx-common/iomux-v3.h>
#include <mmc.h>
#include <fsl_esdhc.h>
#include <miiphy.h>
#include <netdev.h>
#include <asm/arch/sys_proto.h>

DECLARE_GLOBAL_DATA_PTR;

#define UART_PAD_CTRL  (PAD_CTL_PKE | PAD_CTL_PUE |            \
	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |               \
	PAD_CTL_DSE_40ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)

#define USDHC_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |            \
	PAD_CTL_PUS_47K_UP  | PAD_CTL_SPEED_LOW |               \
	PAD_CTL_DSE_80ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)

#define ENET_PAD_CTRL  (PAD_CTL_PKE | PAD_CTL_PUE |		\
	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED   |		\
	PAD_CTL_DSE_40ohm   | PAD_CTL_HYS)

int dram_init(void)
{
	gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);

	return 0;
}

iomux_v3_cfg_t const uart4_pads[] = {
	MX6Q_PAD_KEY_COL0__UART4_TXD | MUX_PAD_CTRL(UART_PAD_CTRL),
	MX6Q_PAD_KEY_ROW0__UART4_RXD | MUX_PAD_CTRL(UART_PAD_CTRL),
};

iomux_v3_cfg_t const enet_pads[] = {
	MX6Q_PAD_KEY_COL1__ENET_MDIO		| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6Q_PAD_KEY_COL2__ENET_MDC		| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6Q_PAD_RGMII_TXC__ENET_RGMII_TXC	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6Q_PAD_RGMII_TD0__ENET_RGMII_TD0	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6Q_PAD_RGMII_TD1__ENET_RGMII_TD1	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6Q_PAD_RGMII_TD2__ENET_RGMII_TD2	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6Q_PAD_RGMII_TD3__ENET_RGMII_TD3	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6Q_PAD_RGMII_TX_CTL__RGMII_TX_CTL	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6Q_PAD_ENET_REF_CLK__ENET_TX_CLK	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6Q_PAD_RGMII_RXC__ENET_RGMII_RXC	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6Q_PAD_RGMII_RD0__ENET_RGMII_RD0	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6Q_PAD_RGMII_RD1__ENET_RGMII_RD1	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6Q_PAD_RGMII_RD2__ENET_RGMII_RD2	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6Q_PAD_RGMII_RD3__ENET_RGMII_RD3	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6Q_PAD_RGMII_RX_CTL__RGMII_RX_CTL	| MUX_PAD_CTRL(ENET_PAD_CTRL),
};

static void setup_iomux_enet(void)
{
	imx_iomux_v3_setup_multiple_pads(enet_pads, ARRAY_SIZE(enet_pads));
}

iomux_v3_cfg_t const usdhc3_pads[] = {
	MX6Q_PAD_SD3_CLK__USDHC3_CLK	| MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6Q_PAD_SD3_CMD__USDHC3_CMD	| MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6Q_PAD_SD3_DAT0__USDHC3_DAT0	| MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6Q_PAD_SD3_DAT1__USDHC3_DAT1	| MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6Q_PAD_SD3_DAT2__USDHC3_DAT2	| MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6Q_PAD_SD3_DAT3__USDHC3_DAT3	| MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6Q_PAD_SD3_DAT4__USDHC3_DAT4	| MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6Q_PAD_SD3_DAT5__USDHC3_DAT5	| MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6Q_PAD_SD3_DAT6__USDHC3_DAT6	| MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6Q_PAD_SD3_DAT7__USDHC3_DAT7	| MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6Q_PAD_GPIO_18__USDHC3_VSELECT | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6Q_PAD_NANDF_CS2__GPIO_6_15   | MUX_PAD_CTRL(NO_PAD_CTRL),
};

static void setup_iomux_uart(void)
{
	imx_iomux_v3_setup_multiple_pads(uart4_pads, ARRAY_SIZE(uart4_pads));
}

#ifdef CONFIG_FSL_ESDHC
struct fsl_esdhc_cfg usdhc_cfg[1] = {
	{USDHC3_BASE_ADDR},
};

int board_mmc_getcd(struct mmc *mmc)
{
	gpio_direction_input(IMX_GPIO_NR(6, 15));
	return !gpio_get_value(IMX_GPIO_NR(6, 15));
}

int board_mmc_init(bd_t *bis)
{
	imx_iomux_v3_setup_multiple_pads(usdhc3_pads, ARRAY_SIZE(usdhc3_pads));

	usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
	return fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
}
#endif

int mx6_rgmii_rework(struct phy_device *phydev)
{
	unsigned short val;

	/* To enable AR8031 ouput a 125MHz clk from CLK_25M */
	phy_write(phydev, MDIO_DEVAD_NONE, 0xd, 0x7);
	phy_write(phydev, MDIO_DEVAD_NONE, 0xe, 0x8016);
	phy_write(phydev, MDIO_DEVAD_NONE, 0xd, 0x4007);

	val = phy_read(phydev, MDIO_DEVAD_NONE, 0xe);
	val &= 0xffe3;
	val |= 0x18;
	phy_write(phydev, MDIO_DEVAD_NONE, 0xe, val);

	/* introduce tx clock delay */
	phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x5);
	val = phy_read(phydev, MDIO_DEVAD_NONE, 0x1e);
	val |= 0x0100;
	phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, val);

	return 0;
}

int board_phy_config(struct phy_device *phydev)
{
	mx6_rgmii_rework(phydev);

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

	return 0;
}

int board_eth_init(bd_t *bis)
{
	int ret;

	setup_iomux_enet();

	ret = cpu_eth_init(bis);
	if (ret)
		printf("FEC MXC: %s:failed\n", __func__);

	return 0;
}

#define BOARD_REV_B  0x200
#define BOARD_REV_A  0x100

static int mx6sabre_rev(void)
{
	/*
	 * Get Board ID information from OCOTP_GP1[15:8]
	 * i.MX6Q ARD RevA: 0x01
	 * i.MX6Q ARD RevB: 0x02
	 */
	struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
	int reg = readl(&ocotp->gp1);
	int ret;

	switch (reg >> 8 & 0x0F) {
	case 0x02:
		ret = BOARD_REV_B;
		break;
	case 0x01:
	default:
		ret = BOARD_REV_A;
		break;
	}

	return ret;
}

u32 get_board_rev(void)
{
	int rev = mx6sabre_rev();

	return (get_cpu_rev() & ~(0xF << 8)) | rev;
}

int board_early_init_f(void)
{
	setup_iomux_uart();

	return 0;
}

int board_init(void)
{
	/* address of boot parameters */
	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;

	return 0;
}

int checkboard(void)
{
	int rev = mx6sabre_rev();
	char *revname;

	switch (rev) {
	case BOARD_REV_B:
		revname = "B";
		break;
	case BOARD_REV_A:
	default:
		revname = "A";
		break;
	}

	printf("Board: MX6Q-Sabreauto rev%s\n", revname);

	return 0;
}
