xref: /openbmc/u-boot/board/grinn/liteboard/board.c (revision a0d12cd2392af52000790739df3fc8ddbd4db460)

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2015-2016 Freescale Semiconductor, Inc.
 * Copyright (C) 2016 Grinn
 */

#include <asm/arch/clock.h>
#include <asm/arch/iomux.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/crm_regs.h>
#include <asm/arch/litesom.h>
#include <asm/arch/mx6ul_pins.h>
#include <asm/arch/mx6-pins.h>
#include <asm/arch/sys_proto.h>
#include <asm/gpio.h>
#include <asm/mach-imx/iomux-v3.h>
#include <asm/mach-imx/boot_mode.h>
#include <asm/io.h>
#include <common.h>
#include <fsl_esdhc.h>
#include <linux/sizes.h>
#include <linux/fb.h>
#include <miiphy.h>
#include <mmc.h>
#include <netdev.h>
#include <spl.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_22K_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_PUE |     \
	PAD_CTL_SPEED_HIGH   |                                   \
	PAD_CTL_DSE_48ohm   | PAD_CTL_SRE_FAST)

#define MDIO_PAD_CTRL  (PAD_CTL_PUS_100K_UP | PAD_CTL_PUE |     \
	PAD_CTL_DSE_48ohm   | PAD_CTL_SRE_FAST | PAD_CTL_ODE)

#define ENET_CLK_PAD_CTRL  (PAD_CTL_DSE_40ohm   | PAD_CTL_SRE_FAST)

static iomux_v3_cfg_t const uart1_pads[] = {
	MX6_PAD_UART1_TX_DATA__UART1_DCE_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
	MX6_PAD_UART1_RX_DATA__UART1_DCE_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
};

static iomux_v3_cfg_t const sd_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_DATA0__USDHC1_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD1_DATA1__USDHC1_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD1_DATA2__USDHC1_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX6_PAD_SD1_DATA3__USDHC1_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),

	/* CD */
	MX6_PAD_UART1_RTS_B__GPIO1_IO19 | MUX_PAD_CTRL(NO_PAD_CTRL),
};

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

#ifdef CONFIG_FSL_ESDHC
static struct fsl_esdhc_cfg sd_cfg = {USDHC1_BASE_ADDR, 0, 4};

#define SD_CD_GPIO	IMX_GPIO_NR(1, 19)

static int mmc_get_env_devno(void)
{
	u32 soc_sbmr = readl(SRC_BASE_ADDR + 0x4);
	int dev_no;
	u32 bootsel;

	bootsel = (soc_sbmr & 0x000000FF) >> 6;

	/* If not boot from sd/mmc, use default value */
	if (bootsel != 1)
		return CONFIG_SYS_MMC_ENV_DEV;

	/* BOOT_CFG2[3] and BOOT_CFG2[4] */
	dev_no = (soc_sbmr & 0x00001800) >> 11;

	return dev_no;
}

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(SD_CD_GPIO);
		break;
	case USDHC2_BASE_ADDR:
		ret = 1;
		break;
	}

	return ret;
}

int board_mmc_init(bd_t *bis)
{
	int ret;

	/* SD */
	imx_iomux_v3_setup_multiple_pads(sd_pads, ARRAY_SIZE(sd_pads));
	gpio_direction_input(SD_CD_GPIO);
	sd_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);

	ret = fsl_esdhc_initialize(bis, &sd_cfg);
	if (ret) {
		printf("Warning: failed to initialize mmc dev 0 (SD)\n");
		return ret;
	}

	return litesom_mmc_init(bis);
}

static int check_mmc_autodetect(void)
{
	char *autodetect_str = env_get("mmcautodetect");

	if ((autodetect_str != NULL) &&
	    (strcmp(autodetect_str, "yes") == 0)) {
		return 1;
	}

	return 0;
}

void board_late_mmc_init(void)
{
	char cmd[32];
	char mmcblk[32];
	u32 dev_no = mmc_get_env_devno();

	if (!check_mmc_autodetect())
		return;

	env_set_ulong("mmcdev", dev_no);

	/* Set mmcblk env */
	sprintf(mmcblk, "/dev/mmcblk%dp2 rootwait rw",
		dev_no);
	env_set("mmcroot", mmcblk);

	sprintf(cmd, "mmc dev %d", dev_no);
	run_command(cmd, 0);
}
#endif

#ifdef CONFIG_FEC_MXC
static int setup_fec(void)
{
	struct iomuxc *const iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;
	int ret;

	/* Use 50M anatop loopback REF_CLK1 for ENET1, clear gpr1[13],
	   set gpr1[17]*/
	clrsetbits_le32(&iomuxc_regs->gpr[1], IOMUX_GPR1_FEC1_MASK,
			IOMUX_GPR1_FEC1_CLOCK_MUX1_SEL_MASK);

	ret = enable_fec_anatop_clock(0, ENET_50MHZ);
	if (ret)
		return ret;

	enable_enet_clk(1);

	return 0;
}
#endif

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;

#ifdef	CONFIG_FEC_MXC
	setup_fec();
#endif

	return 0;
}

#ifdef CONFIG_CMD_BMODE
static const struct boot_mode board_boot_modes[] = {
	/* 4 bit bus width */
	{"sd",   MAKE_CFGVAL(0x40, 0x20, 0x00, 0x00)},
	{"emmc", MAKE_CFGVAL(0x60, 0x48, 0x00, 0x00)},
	{NULL,	 0},
};
#endif

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

#ifdef CONFIG_ENV_IS_IN_MMC
	board_late_mmc_init();
#endif

	return 0;
}

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

	return 0;
}

#ifdef CONFIG_SPL_BUILD
void board_boot_order(u32 *spl_boot_list)
{
	struct src *psrc = (struct src *)SRC_BASE_ADDR;
	unsigned gpr10_boot = readl(&psrc->gpr10) & (1 << 28);
	unsigned reg = gpr10_boot ? readl(&psrc->gpr9) : readl(&psrc->sbmr1);
	unsigned port = (reg >> 11) & 0x1;

	if (port == 0) {
		spl_boot_list[0] = BOOT_DEVICE_MMC1;
		spl_boot_list[1] = BOOT_DEVICE_MMC2;
	} else {
		spl_boot_list[0] = BOOT_DEVICE_MMC2;
		spl_boot_list[1] = BOOT_DEVICE_MMC1;
	}
}

void board_init_f(ulong dummy)
{
	litesom_init_f();
}
#endif