board/wandboard/wandboard.c

/*
 * Copyright (C) 2013 Freescale Semiconductor, Inc.
 *
 * Author: Fabio Estevam <fabio.estevam@freescale.com>
 *
 * 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.
 */

#include <asm/arch/clock.h>
#include <asm/arch/crm_regs.h>
#include <asm/arch/iomux.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/mx6-pins.h>
#include <asm/arch/mxc_hdmi.h>
#include <asm/arch/sys_proto.h>
#include <asm/gpio.h>
#include <asm/imx-common/iomux-v3.h>
#include <asm/imx-common/boot_mode.h>
#include <asm/io.h>
#include <asm/sizes.h>
#include <common.h>
#include <fsl_esdhc.h>
#include <ipu_pixfmt.h>
#include <mmc.h>
#include <miiphy.h>
#include <netdev.h>
#include <linux/fb.h>

DECLARE_GLOBAL_DATA_PTR;

#define UART_PAD_CTRL  (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_PUS_47K_UP |			\
	PAD_CTL_SPEED_LOW | PAD_CTL_DSE_80ohm |			\
	PAD_CTL_SRE_FAST  | PAD_CTL_HYS)

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

#define USDHC1_CD_GPIO		IMX_GPIO_NR(1, 2)
#define USDHC3_CD_GPIO		IMX_GPIO_NR(3, 9)
#define ETH_PHY_RESET		IMX_GPIO_NR(3, 29)

int dram_init(void)
{
	gd->ram_size = (phys_size_t)CONFIG_DDR_MB * 1024 * 1024;

	return 0;
}

static iomux_v3_cfg_t const uart1_pads[] = {
	MX6_PAD_CSI0_DAT10__UART1_TXD | MUX_PAD_CTRL(UART_PAD_CTRL),
	MX6_PAD_CSI0_DAT11__UART1_RXD | MUX_PAD_CTRL(UART_PAD_CTRL),
};

iomux_v3_cfg_t const usdhc1_pads[] = {
	MX6_PAD_SD1_CLK__USDHC1_CLK   | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD1_CMD__USDHC1_CMD   | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD1_DAT0__USDHC1_DAT0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD1_DAT1__USDHC1_DAT1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD1_DAT2__USDHC1_DAT2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD1_DAT3__USDHC1_DAT3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	/* Carrier MicroSD Card Detect */
	MX6_PAD_GPIO_2__GPIO_1_2      | MUX_PAD_CTRL(NO_PAD_CTRL),
};

static iomux_v3_cfg_t const usdhc3_pads[] = {
	MX6_PAD_SD3_CLK__USDHC3_CLK   | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD3_CMD__USDHC3_CMD   | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD3_DAT0__USDHC3_DAT0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD3_DAT1__USDHC3_DAT1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD3_DAT2__USDHC3_DAT2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD3_DAT3__USDHC3_DAT3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	/* SOM MicroSD Card Detect */
	MX6_PAD_EIM_DA9__GPIO_3_9     | MUX_PAD_CTRL(NO_PAD_CTRL),
};

static iomux_v3_cfg_t const enet_pads[] = {
	MX6_PAD_ENET_MDIO__ENET_MDIO		| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6_PAD_ENET_MDC__ENET_MDC		| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6_PAD_RGMII_TXC__ENET_RGMII_TXC	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6_PAD_RGMII_TD0__ENET_RGMII_TD0	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6_PAD_RGMII_TD1__ENET_RGMII_TD1	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6_PAD_RGMII_TD2__ENET_RGMII_TD2	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6_PAD_RGMII_TD3__ENET_RGMII_TD3	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6_PAD_RGMII_TX_CTL__RGMII_TX_CTL	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6_PAD_ENET_REF_CLK__ENET_TX_CLK	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6_PAD_RGMII_RXC__ENET_RGMII_RXC	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6_PAD_RGMII_RD0__ENET_RGMII_RD0	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6_PAD_RGMII_RD1__ENET_RGMII_RD1	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6_PAD_RGMII_RD2__ENET_RGMII_RD2	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6_PAD_RGMII_RD3__ENET_RGMII_RD3	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	MX6_PAD_RGMII_RX_CTL__RGMII_RX_CTL	| MUX_PAD_CTRL(ENET_PAD_CTRL),
	/* AR8031 PHY Reset */
	MX6_PAD_EIM_D29__GPIO_3_29		| MUX_PAD_CTRL(NO_PAD_CTRL),
};

static void setup_iomux_uart(void)
{
	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
}

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

	/* Reset AR8031 PHY */
	gpio_direction_output(ETH_PHY_RESET, 0);
	udelay(500);
	gpio_set_value(ETH_PHY_RESET, 1);
}

static struct fsl_esdhc_cfg usdhc_cfg[2] = {
	{USDHC3_BASE_ADDR},
	{USDHC1_BASE_ADDR},
};

int board_mmc_getcd(struct mmc *mmc)
{
	struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
	int ret = 0;

	switch (cfg->esdhc_base) {
	case USDHC1_BASE_ADDR:
		ret = !gpio_get_value(USDHC1_CD_GPIO);
		break;
	case USDHC3_BASE_ADDR:
		ret = !gpio_get_value(USDHC3_CD_GPIO);
		break;
	}

	return ret;
}

int board_mmc_init(bd_t *bis)
{
	s32 status = 0;
	u32 index = 0;

	/*
	 * Following map is done:
	 * (U-boot device node)    (Physical Port)
	 * mmc0                    SOM MicroSD
	 * mmc1                    Carrier board MicroSD
	 */
	for (index = 0; index < CONFIG_SYS_FSL_USDHC_NUM; ++index) {
		switch (index) {
		case 0:
			imx_iomux_v3_setup_multiple_pads(
				usdhc3_pads, ARRAY_SIZE(usdhc3_pads));
			usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
			usdhc_cfg[0].max_bus_width = 4;
			gpio_direction_input(USDHC3_CD_GPIO);
			break;
		case 1:
			imx_iomux_v3_setup_multiple_pads(
				usdhc1_pads, ARRAY_SIZE(usdhc1_pads));
			usdhc_cfg[1].sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
			usdhc_cfg[1].max_bus_width = 4;
			gpio_direction_input(USDHC1_CD_GPIO);
			break;
		default:
			printf("Warning: you configured more USDHC controllers"
			       "(%d) then supported by the board (%d)\n",
			       index + 1, CONFIG_SYS_FSL_USDHC_NUM);
			return status;
		}

		status |= fsl_esdhc_initialize(bis, &usdhc_cfg[index]);
	}

	return status;
}

static 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;
}

#if defined(CONFIG_VIDEO_IPUV3)
static void enable_hdmi(void)
{
	struct hdmi_regs *hdmi	= (struct hdmi_regs *)HDMI_ARB_BASE_ADDR;
	u8 reg;
	reg = readb(&hdmi->phy_conf0);
	reg |= HDMI_PHY_CONF0_PDZ_MASK;
	writeb(reg, &hdmi->phy_conf0);

	udelay(3000);
	reg |= HDMI_PHY_CONF0_ENTMDS_MASK;
	writeb(reg, &hdmi->phy_conf0);
	udelay(3000);
	reg |= HDMI_PHY_CONF0_GEN2_TXPWRON_MASK;
	writeb(reg, &hdmi->phy_conf0);
	writeb(HDMI_MC_PHYRSTZ_ASSERT, &hdmi->mc_phyrstz);
}

static struct fb_videomode const hdmi = {
	.name           = "HDMI",
	.refresh        = 60,
	.xres           = 1024,
	.yres           = 768,
	.pixclock       = 15385,
	.left_margin    = 220,
	.right_margin   = 40,
	.upper_margin   = 21,
	.lower_margin   = 7,
	.hsync_len      = 60,
	.vsync_len      = 10,
	.sync           = FB_SYNC_EXT,
	.vmode          = FB_VMODE_NONINTERLACED
};

int board_video_skip(void)
{
	int ret;

	ret = ipuv3_fb_init(&hdmi, 0, IPU_PIX_FMT_RGB24);

	if (ret)
		printf("HDMI cannot be configured: %d\n", ret);

	enable_hdmi();

	return ret;
}

static void setup_display(void)
{
	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
	struct hdmi_regs *hdmi	= (struct hdmi_regs *)HDMI_ARB_BASE_ADDR;
	int reg;

	/* Turn on IPU clock */
	reg = readl(&mxc_ccm->CCGR3);
	reg |= MXC_CCM_CCGR3_IPU1_IPU_DI0_OFFSET;
	writel(reg, &mxc_ccm->CCGR3);

	/* Turn on HDMI PHY clock */
	reg = readl(&mxc_ccm->CCGR2);
	reg |=  MXC_CCM_CCGR2_HDMI_TX_IAHBCLK_MASK
		| MXC_CCM_CCGR2_HDMI_TX_ISFRCLK_MASK;
	writel(reg, &mxc_ccm->CCGR2);

	/* clear HDMI PHY reset */
	writeb(HDMI_MC_PHYRSTZ_DEASSERT, &hdmi->mc_phyrstz);

	reg = readl(&mxc_ccm->chsccdr);
	reg &= ~(MXC_CCM_CHSCCDR_IPU1_DI0_PRE_CLK_SEL_MASK
		| MXC_CCM_CHSCCDR_IPU1_DI0_PODF_MASK
		| MXC_CCM_CHSCCDR_IPU1_DI0_CLK_SEL_MASK);
	reg |= (CHSCCDR_CLK_SEL_LDB_DI0
		<< MXC_CCM_CHSCCDR_IPU1_DI0_CLK_SEL_OFFSET)
	      | (CHSCCDR_PODF_DIVIDE_BY_3
		<< MXC_CCM_CHSCCDR_IPU1_DI0_PODF_OFFSET)
	      | (CHSCCDR_IPU_PRE_CLK_540M_PFD
		<< MXC_CCM_CHSCCDR_IPU1_DI0_PRE_CLK_SEL_OFFSET);
	writel(reg, &mxc_ccm->chsccdr);
}
#endif /* CONFIG_VIDEO_IPUV3 */

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;
}

int board_early_init_f(void)
{
	setup_iomux_uart();
#if defined(CONFIG_VIDEO_IPUV3)
	setup_display();
#endif
	return 0;
}

/*
 * Do not overwrite the console
 * Use always serial for U-Boot console
 */
int overwrite_console(void)
{
	return 1;
}

#ifdef CONFIG_CMD_BMODE
static const struct boot_mode board_boot_modes[] = {
	/* 4 bit bus width */
	{"mmc0",	  MAKE_CFGVAL(0x40, 0x30, 0x00, 0x00)},
	{"mmc1",	  MAKE_CFGVAL(0x40, 0x20, 0x00, 0x00)},
	{NULL,	 0},
};
#endif

int board_late_init(void)
{
#ifdef CONFIG_CMD_BMODE
	add_board_boot_modes(board_boot_modes);
#endif

	return 0;
}

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

	return 0;
}

int checkboard(void)
{
	puts("Board: Wandboard\n");

	return 0;
}