board/engicam/isiotmx6ul/isiotmx6ul.c

/*
 * Copyright (C) 2016 Amarula Solutions B.V.
 * Copyright (C) 2016 Engicam S.r.l.
 * Author: Jagan Teki <jagan@amarulasolutions.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <mmc.h>

#include <asm/io.h>
#include <asm/gpio.h>
#include <linux/sizes.h>

#include <asm/arch/clock.h>
#include <asm/arch/crm_regs.h>
#include <asm/arch/iomux.h>
#include <asm/arch/mx6-pins.h>
#include <asm/arch/sys_proto.h>
#include <asm/imx-common/iomux-v3.h>

#include "../common/board.h"

DECLARE_GLOBAL_DATA_PTR;

#ifdef CONFIG_NAND_MXS

#define GPMI_PAD_CTRL0		(PAD_CTL_PKE | PAD_CTL_PUE | PAD_CTL_PUS_100K_UP)
#define GPMI_PAD_CTRL1		(PAD_CTL_DSE_40ohm | PAD_CTL_SPEED_MED | \
				PAD_CTL_SRE_FAST)
#define GPMI_PAD_CTRL2		(GPMI_PAD_CTRL0 | GPMI_PAD_CTRL1)

static iomux_v3_cfg_t const nand_pads[] = {
	IOMUX_PADS(PAD_NAND_DATA00__RAWNAND_DATA00 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NAND_DATA01__RAWNAND_DATA01 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NAND_DATA02__RAWNAND_DATA02 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NAND_DATA03__RAWNAND_DATA03 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NAND_DATA04__RAWNAND_DATA04 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NAND_DATA05__RAWNAND_DATA05 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NAND_DATA06__RAWNAND_DATA06 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NAND_DATA07__RAWNAND_DATA07 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NAND_CLE__RAWNAND_CLE | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NAND_ALE__RAWNAND_ALE | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NAND_CE0_B__RAWNAND_CE0_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NAND_RE_B__RAWNAND_RE_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NAND_WE_B__RAWNAND_WE_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NAND_WP_B__RAWNAND_WP_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NAND_READY_B__RAWNAND_READY_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
};

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

	/* config gpmi nand iomux */
	SETUP_IOMUX_PADS(nand_pads);

	clrbits_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_MASK);

	/*
	 * config gpmi and bch clock to 100 MHz
	 * bch/gpmi select PLL2 PFD2 400M
	 * 100M = 400M / 4
	 */
	clrbits_le32(&mxc_ccm->cscmr1,
		     MXC_CCM_CSCMR1_BCH_CLK_SEL |
		     MXC_CCM_CSCMR1_GPMI_CLK_SEL);
	clrsetbits_le32(&mxc_ccm->cscdr1,
			MXC_CCM_CSCDR1_BCH_PODF_MASK |
			MXC_CCM_CSCDR1_GPMI_PODF_MASK,
			(3 << MXC_CCM_CSCDR1_BCH_PODF_OFFSET) |
			(3 << MXC_CCM_CSCDR1_GPMI_PODF_OFFSET));

	/* 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_MASK);

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

#ifdef CONFIG_ENV_IS_IN_MMC
int board_mmc_get_env_dev(int devno)
{
	/* dev 0 for SD/eSD, dev 1 for MMC/eMMC */
	return (devno == 0) ? 0 : 1;
}
#endif

int board_late_init(void)
{
	switch ((imx6_src_get_boot_mode() & IMX6_BMODE_MASK) >>
			IMX6_BMODE_SHIFT) {
	case IMX6_BMODE_SD:
	case IMX6_BMODE_ESD:
	case IMX6_BMODE_MMC:
	case IMX6_BMODE_EMMC:
#ifdef CONFIG_ENV_IS_IN_MMC
		mmc_late_init();
#endif
		setenv("modeboot", "mmcboot");
		break;
	case IMX6_BMODE_NAND:
		setenv("modeboot", "nandboot");
		break;
	default:
		setenv("modeboot", "");
		break;
	}

	if (is_mx6ul()) {
#ifdef CONFIG_ENV_IS_IN_MMC
		setenv("fdt_file", "imx6ul-isiot-emmc.dtb");
#else
		setenv("fdt_file", "imx6ul-isiot-nand.dtb");
#endif
	}

	return 0;
}

#ifdef CONFIG_SPL_BUILD
#include <spl.h>

/* MMC board initialization is needed till adding DM support in SPL */
#if defined(CONFIG_FSL_ESDHC) && !defined(CONFIG_DM_MMC)
#include <mmc.h>
#include <fsl_esdhc.h>

#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)

static iomux_v3_cfg_t const usdhc1_pads[] = {
	IOMUX_PADS(PAD_SD1_CLK__USDHC1_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
	IOMUX_PADS(PAD_SD1_CMD__USDHC1_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
	IOMUX_PADS(PAD_SD1_DATA0__USDHC1_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
	IOMUX_PADS(PAD_SD1_DATA1__USDHC1_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
	IOMUX_PADS(PAD_SD1_DATA2__USDHC1_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
	IOMUX_PADS(PAD_SD1_DATA3__USDHC1_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),

	/* VSELECT */
	IOMUX_PADS(PAD_GPIO1_IO05__USDHC1_VSELECT | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
	/* CD */
	IOMUX_PADS(PAD_UART1_RTS_B__GPIO1_IO19 | MUX_PAD_CTRL(NO_PAD_CTRL)),
	/* RST_B */
	IOMUX_PADS(PAD_GPIO1_IO09__GPIO1_IO09 | MUX_PAD_CTRL(NO_PAD_CTRL)),
};

static iomux_v3_cfg_t const usdhc2_pads[] = {
	IOMUX_PADS(PAD_NAND_ALE__USDHC2_RESET_B | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
	IOMUX_PADS(PAD_NAND_RE_B__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
	IOMUX_PADS(PAD_NAND_WE_B__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
	IOMUX_PADS(PAD_NAND_DATA00__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
	IOMUX_PADS(PAD_NAND_DATA01__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
	IOMUX_PADS(PAD_NAND_DATA02__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
	IOMUX_PADS(PAD_NAND_DATA03__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
	IOMUX_PADS(PAD_NAND_DATA04__USDHC2_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
	IOMUX_PADS(PAD_NAND_DATA05__USDHC2_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
};

#define USDHC1_CD_GPIO	IMX_GPIO_NR(1, 19)
#define USDHC2_CD_GPIO	IMX_GPIO_NR(4, 5)

struct fsl_esdhc_cfg usdhc_cfg[2] = {
	{USDHC1_BASE_ADDR, 0, 4},
	{USDHC2_BASE_ADDR, 0, 8},
};

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 USDHC2_BASE_ADDR:
		ret = !gpio_get_value(USDHC2_CD_GPIO);
		break;
	}

	return ret;
}

int board_mmc_init(bd_t *bis)
{
	int i, ret;

	/*
	* According to the board_mmc_init() the following map is done:
	* (U-boot device node)    (Physical Port)
	* mmc0				USDHC1
	* mmc1				USDHC2
	*/
	for (i = 0; i < CONFIG_SYS_FSL_USDHC_NUM; i++) {
		switch (i) {
		case 0:
			SETUP_IOMUX_PADS(usdhc1_pads);
			gpio_direction_input(USDHC1_CD_GPIO);
			usdhc_cfg[i].sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
			break;
		case 1:
			SETUP_IOMUX_PADS(usdhc2_pads);
			gpio_direction_input(USDHC2_CD_GPIO);
			usdhc_cfg[i].sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
			break;
		default:
			printf("Warning - USDHC%d controller not supporting\n",
			       i + 1);
			return 0;
		}

		ret = fsl_esdhc_initialize(bis, &usdhc_cfg[i]);
		if (ret) {
			printf("Warning: failed to initialize mmc dev %d\n", i);
			return ret;
		}
	}

	return 0;
}

#ifdef CONFIG_ENV_IS_IN_MMC
void board_boot_order(u32 *spl_boot_list)
{
	u32 bmode = imx6_src_get_boot_mode();
	u8 boot_dev = BOOT_DEVICE_MMC1;

	switch ((bmode & IMX6_BMODE_MASK) >> IMX6_BMODE_SHIFT) {
	case IMX6_BMODE_SD:
	case IMX6_BMODE_ESD:
		/* SD/eSD - BOOT_DEVICE_MMC1 */
		break;
	case IMX6_BMODE_MMC:
	case IMX6_BMODE_EMMC:
		/* MMC/eMMC */
		boot_dev = BOOT_DEVICE_MMC2;
		break;
	default:
		/* Default - BOOT_DEVICE_MMC1 */
		printf("Wrong board boot order\n");
		break;
	}

	spl_boot_list[0] = boot_dev;
}
#endif
#endif /* CONFIG_FSL_ESDHC */
#endif /* CONFIG_SPL_BUILD */