uboot/u-boot-stm32mp-2020.01/board/technexion/pico-imx6/pico-imx6.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2013 Freescale Semiconductor, Inc.
 * Copyright (C) 2014 O.S. Systems Software LTDA.
 *
 * Author: Fabio Estevam <festevam@gmail.com>
 */

#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/sys_proto.h>
#include <asm/gpio.h>
#include <asm/arch/mxc_hdmi.h>
#include <asm/mach-imx/video.h>
#include <asm/mach-imx/iomux-v3.h>
#include <asm/io.h>
#include <linux/sizes.h>
#include <common.h>
#include <miiphy.h>
#include <netdev.h>
#include <phy.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 ENET_PAD_CTRL  (PAD_CTL_PUS_100K_UP |			\
	PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | PAD_CTL_HYS)

#define ETH_PHY_RESET		IMX_GPIO_NR(1, 26)
#define LVDS0_EN		IMX_GPIO_NR(2, 8)
#define LVDS0_BL_EN		IMX_GPIO_NR(2, 9)

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

	return 0;
}

static iomux_v3_cfg_t const uart1_pads[] = {
	IOMUX_PADS(PAD_CSI0_DAT10__UART1_TX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL)),
	IOMUX_PADS(PAD_CSI0_DAT11__UART1_RX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL)),
};

static void setup_iomux_uart(void)
{
	SETUP_IOMUX_PADS(uart1_pads);
}

static iomux_v3_cfg_t const lvds_pads[] = {
	/* lvds */
	IOMUX_PADS(PAD_SD4_DAT0__GPIO2_IO08 | MUX_PAD_CTRL(NO_PAD_CTRL)),
	IOMUX_PADS(PAD_SD4_DAT1__GPIO2_IO09 | MUX_PAD_CTRL(NO_PAD_CTRL)),
	IOMUX_PADS(PAD_DI0_DISP_CLK__IPU1_DI0_DISP_CLK | MUX_PAD_CTRL(NO_PAD_CTRL)),
	IOMUX_PADS(PAD_DI0_PIN2__IPU1_DI0_PIN02 | MUX_PAD_CTRL(NO_PAD_CTRL)),
	IOMUX_PADS(PAD_DI0_PIN3__IPU1_DI0_PIN03 | MUX_PAD_CTRL(NO_PAD_CTRL)),
};

static iomux_v3_cfg_t const enet_pads[] = {
	IOMUX_PADS(PAD_ENET_MDIO__ENET_MDIO  | MUX_PAD_CTRL(ENET_PAD_CTRL)),
	IOMUX_PADS(PAD_ENET_MDC__ENET_MDC    | MUX_PAD_CTRL(ENET_PAD_CTRL)),
	IOMUX_PADS(PAD_RGMII_TXC__RGMII_TXC  | MUX_PAD_CTRL(ENET_PAD_CTRL)),
	IOMUX_PADS(PAD_RGMII_TD0__RGMII_TD0  | MUX_PAD_CTRL(ENET_PAD_CTRL)),
	IOMUX_PADS(PAD_RGMII_TD1__RGMII_TD1  | MUX_PAD_CTRL(ENET_PAD_CTRL)),
	IOMUX_PADS(PAD_RGMII_TD2__RGMII_TD2  | MUX_PAD_CTRL(ENET_PAD_CTRL)),
	IOMUX_PADS(PAD_RGMII_TD3__RGMII_TD3  | MUX_PAD_CTRL(ENET_PAD_CTRL)),
	IOMUX_PADS(PAD_RGMII_TX_CTL__RGMII_TX_CTL |
		   MUX_PAD_CTRL(ENET_PAD_CTRL)),
	IOMUX_PADS(PAD_ENET_REF_CLK__ENET_TX_CLK |
		   MUX_PAD_CTRL(ENET_PAD_CTRL)),
	IOMUX_PADS(PAD_RGMII_RXC__RGMII_RXC  | MUX_PAD_CTRL(ENET_PAD_CTRL)),
	IOMUX_PADS(PAD_RGMII_RD0__RGMII_RD0  | MUX_PAD_CTRL(ENET_PAD_CTRL)),
	IOMUX_PADS(PAD_RGMII_RD1__RGMII_RD1  | MUX_PAD_CTRL(ENET_PAD_CTRL)),
	IOMUX_PADS(PAD_RGMII_RD2__RGMII_RD2  | MUX_PAD_CTRL(ENET_PAD_CTRL)),
	IOMUX_PADS(PAD_RGMII_RD3__RGMII_RD3  | MUX_PAD_CTRL(ENET_PAD_CTRL)),
	IOMUX_PADS(PAD_RGMII_RX_CTL__RGMII_RX_CTL | MUX_PAD_CTRL(ENET_PAD_CTRL)),
	/* AR8035 PHY Reset */
        IOMUX_PADS(PAD_ENET_RXD1__GPIO1_IO26 | MUX_PAD_CTRL(NO_PAD_CTRL)),
};

static void setup_iomux_enet(void)
{
	SETUP_IOMUX_PADS(enet_pads);

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

#if defined(CONFIG_VIDEO_IPUV3)
static iomux_v3_cfg_t const ft5x06_wvga_pads[] = {
	IOMUX_PADS(PAD_DI0_DISP_CLK__IPU1_DI0_DISP_CLK),
	IOMUX_PADS(PAD_DI0_PIN2__IPU1_DI0_PIN02), /* HSync */
	IOMUX_PADS(PAD_DI0_PIN3__IPU1_DI0_PIN03), /* VSync */
	IOMUX_PADS(PAD_DI0_PIN4__IPU1_DI0_PIN04	| MUX_PAD_CTRL(PAD_CTL_DSE_120ohm)), /* Contrast */
	IOMUX_PADS(PAD_DI0_PIN15__IPU1_DI0_PIN15), /* DISP0_DRDY */
	IOMUX_PADS(PAD_DISP0_DAT0__IPU1_DISP0_DATA00),
	IOMUX_PADS(PAD_DISP0_DAT1__IPU1_DISP0_DATA01),
	IOMUX_PADS(PAD_DISP0_DAT2__IPU1_DISP0_DATA02),
	IOMUX_PADS(PAD_DISP0_DAT3__IPU1_DISP0_DATA03),
	IOMUX_PADS(PAD_DISP0_DAT4__IPU1_DISP0_DATA04),
	IOMUX_PADS(PAD_DISP0_DAT5__IPU1_DISP0_DATA05),
	IOMUX_PADS(PAD_DISP0_DAT6__IPU1_DISP0_DATA06),
	IOMUX_PADS(PAD_DISP0_DAT7__IPU1_DISP0_DATA07),
	IOMUX_PADS(PAD_DISP0_DAT8__IPU1_DISP0_DATA08),
	IOMUX_PADS(PAD_DISP0_DAT9__IPU1_DISP0_DATA09),
	IOMUX_PADS(PAD_DISP0_DAT10__IPU1_DISP0_DATA10),
	IOMUX_PADS(PAD_DISP0_DAT11__IPU1_DISP0_DATA11),
	IOMUX_PADS(PAD_DISP0_DAT12__IPU1_DISP0_DATA12),
	IOMUX_PADS(PAD_DISP0_DAT13__IPU1_DISP0_DATA13),
	IOMUX_PADS(PAD_DISP0_DAT14__IPU1_DISP0_DATA14),
	IOMUX_PADS(PAD_DISP0_DAT15__IPU1_DISP0_DATA15),
	IOMUX_PADS(PAD_DISP0_DAT16__IPU1_DISP0_DATA16),
	IOMUX_PADS(PAD_DISP0_DAT17__IPU1_DISP0_DATA17),
	IOMUX_PADS(PAD_DISP0_DAT18__IPU1_DISP0_DATA18),
	IOMUX_PADS(PAD_DISP0_DAT19__IPU1_DISP0_DATA19),
	IOMUX_PADS(PAD_DISP0_DAT20__IPU1_DISP0_DATA20),
	IOMUX_PADS(PAD_DISP0_DAT21__IPU1_DISP0_DATA21),
	IOMUX_PADS(PAD_DISP0_DAT22__IPU1_DISP0_DATA22),
	IOMUX_PADS(PAD_DISP0_DAT23__IPU1_DISP0_DATA23),
	IOMUX_PADS(PAD_SD4_DAT2__GPIO2_IO10 | MUX_PAD_CTRL(NO_PAD_CTRL)), /* DISP0_BKLEN */
	IOMUX_PADS(PAD_SD4_DAT3__GPIO2_IO11 | MUX_PAD_CTRL(NO_PAD_CTRL)), /* DISP0_VDDEN */
};

static void do_enable_hdmi(struct display_info_t const *dev)
{
	imx_enable_hdmi_phy();
}

static void enable_lvds(struct display_info_t const *dev)
{
	struct iomuxc *iomux = (struct iomuxc *)
				IOMUXC_BASE_ADDR;

	/* set CH0 data width to 24bit (IOMUXC_GPR2:5 0=18bit, 1=24bit) */
	u32 reg = readl(&iomux->gpr[2]);
	reg |= IOMUXC_GPR2_DATA_WIDTH_CH0_24BIT;
	writel(reg, &iomux->gpr[2]);

	/* Enable Backlight - use GPIO for Brightness adjustment */
	SETUP_IOMUX_PAD(PAD_SD4_DAT1__GPIO2_IO09);
	gpio_request(IMX_GPIO_NR(2, 9), "backlight_enable");
	gpio_direction_output(IMX_GPIO_NR(2, 9), 1);

	gpio_request(IMX_GPIO_NR(2, 8), "brightness");
	SETUP_IOMUX_PAD(PAD_SD4_DAT0__GPIO2_IO08);
	gpio_direction_output(IMX_GPIO_NR(2, 8), 1);
}

static void enable_ft5x06_wvga(struct display_info_t const *dev)
{
	SETUP_IOMUX_PADS(ft5x06_wvga_pads);

	gpio_request(IMX_GPIO_NR(2, 10), "parallel_enable");
	gpio_request(IMX_GPIO_NR(2, 11), "parallel_brightness");
	gpio_direction_output(IMX_GPIO_NR(2, 10), 1);
	gpio_direction_output(IMX_GPIO_NR(2, 11), 1);
}

struct display_info_t const displays[] = {{
	.bus	= 1,
	.addr	= 0x38,
	.pixfmt	= IPU_PIX_FMT_RGB24,
	.detect	= NULL,
	.enable	= enable_ft5x06_wvga,
	.mode	= {
		.name           = "FT5x06-WVGA",
		.refresh        = 60,
		.xres           = 800,
		.yres           = 480,
		.pixclock       = 30303,
		.left_margin    = 45,
		.right_margin   = 210,
		.upper_margin   = 22,
		.lower_margin   = 22,
		.hsync_len      = 1,
		.vsync_len      = 1,
		.sync           = 0,
		.vmode          = FB_VMODE_NONINTERLACED
} }, {
	.bus	= -1,
	.addr	= 0,
	.pixfmt = IPU_PIX_FMT_RGB24,
	.detect = NULL,
	.enable = enable_lvds,
	.mode	= {
		.name		= "hj070na",
		.refresh	= 60,
		.xres		= 1024,
		.yres		= 600,
		.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
} }, {
	.bus	= -1,
	.addr	= 0,
	.pixfmt	= IPU_PIX_FMT_RGB24,
	.detect	= detect_hdmi,
	.enable	= do_enable_hdmi,
	.mode	= {
		.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
} } };
size_t display_count = ARRAY_SIZE(displays);

static void setup_display(void)
{
	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
	struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
	int reg;

	/* Setup HSYNC, VSYNC, DISP_CLK for debugging purposes */
	SETUP_IOMUX_PADS(lvds_pads);
	gpio_request(LVDS0_EN, "lvds0_enable");
	gpio_request(LVDS0_BL_EN, "lvds0_bl_enable");
	gpio_direction_output(LVDS0_EN, 1);
	gpio_direction_output(LVDS0_BL_EN, 1);

	enable_ipu_clock();
	imx_setup_hdmi();

	reg = __raw_readl(&mxc_ccm->CCGR3);
	reg |=  MXC_CCM_CCGR3_LDB_DI0_MASK | MXC_CCM_CCGR3_LDB_DI1_MASK;
	writel(reg, &mxc_ccm->CCGR3);

	/* set LDB0, LDB1 clk select to 011/011 */
	reg = readl(&mxc_ccm->cs2cdr);
	reg &= ~(MXC_CCM_CS2CDR_LDB_DI0_CLK_SEL_MASK
		| MXC_CCM_CS2CDR_LDB_DI1_CLK_SEL_MASK);
	reg |= (3 << MXC_CCM_CS2CDR_LDB_DI0_CLK_SEL_OFFSET)
		 | (3 << MXC_CCM_CS2CDR_LDB_DI1_CLK_SEL_OFFSET);
	writel(reg, &mxc_ccm->cs2cdr);

	reg = readl(&mxc_ccm->cscmr2);
	reg |= MXC_CCM_CSCMR2_LDB_DI0_IPU_DIV | MXC_CCM_CSCMR2_LDB_DI1_IPU_DIV;
	writel(reg, &mxc_ccm->cscmr2);

	reg = readl(&mxc_ccm->chsccdr);
	reg |= (CHSCCDR_CLK_SEL_LDB_DI0
		<< MXC_CCM_CHSCCDR_IPU1_DI0_CLK_SEL_OFFSET);
	reg |= (CHSCCDR_CLK_SEL_LDB_DI0
		<< MXC_CCM_CHSCCDR_IPU1_DI1_CLK_SEL_OFFSET);
	writel(reg, &mxc_ccm->chsccdr);

	 reg = IOMUXC_GPR2_BGREF_RRMODE_EXTERNAL_RES
		| IOMUXC_GPR2_DI1_VS_POLARITY_ACTIVE_LOW
		| IOMUXC_GPR2_DI0_VS_POLARITY_ACTIVE_LOW
		| IOMUXC_GPR2_BIT_MAPPING_CH1_SPWG
		| IOMUXC_GPR2_DATA_WIDTH_CH1_24BIT
		| IOMUXC_GPR2_BIT_MAPPING_CH0_SPWG
		| IOMUXC_GPR2_DATA_WIDTH_CH0_24BIT
		| IOMUXC_GPR2_LVDS_CH1_MODE_ENABLED_DI0
		| 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_HDMI_MUX_CTL_MASK))
		| (IOMUXC_GPR3_MUX_SRC_IPU1_DI0
		<< IOMUXC_GPR3_LVDS0_MUX_CTL_OFFSET);

	writel(reg, &iomux->gpr[3]);
}
#endif /* CONFIG_VIDEO_IPUV3 */

int board_early_init_f(void)
{
	setup_iomux_uart();

#if defined(CONFIG_VIDEO_IPUV3)
	setup_display();
#endif

	return 0;
}

int board_eth_init(bd_t *bis)
{
	setup_iomux_enet();

	return cpu_eth_init(bis);
}

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

	/* To enable AR8035 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 &= 0xffe7;
	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);

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

	return 0;
}

int overwrite_console(void)
{
	return 1;
}

int board_late_init(void)
{
	if (is_mx6dq())
		env_set("board_rev", "MX6Q");
	else
		env_set("board_rev", "MX6DL");

	return 0;
}

int board_init(void)
{
	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;

	return 0;
}

int checkboard(void)
{
	puts("Board: PICO-IMX6\n");

	return 0;
}