board/engicam/imx6q/imx6q.c

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

#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/mach-imx/iomux-v3.h>
#include <asm/mach-imx/video.h>

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

#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 gpmi_pads[] = {
	IOMUX_PADS(PAD_NANDF_CLE__NAND_CLE	| MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NANDF_ALE__NAND_ALE	| MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NANDF_WP_B__NAND_WP_B	| MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NANDF_RB0__NAND_READY_B	| MUX_PAD_CTRL(GPMI_PAD_CTRL0)),
	IOMUX_PADS(PAD_NANDF_CS0__NAND_CE0_B	| MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_SD4_CMD__NAND_RE_B	| MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_SD4_CLK__NAND_WE_B	| MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NANDF_D0__NAND_DATA00	| MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NANDF_D1__NAND_DATA01	| MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NANDF_D2__NAND_DATA02	| MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NANDF_D3__NAND_DATA03	| MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NANDF_D4__NAND_DATA04	| MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NANDF_D5__NAND_DATA05	| MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NANDF_D6__NAND_DATA06	| MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
	IOMUX_PADS(PAD_NANDF_D7__NAND_DATA07	| 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(gpmi_pads);

	/* gate ENFC_CLK_ROOT clock first,before clk source switch */
	clrbits_le32(&mxc_ccm->CCGR2, MXC_CCM_CCGR2_IOMUX_IPT_CLK_IO_MASK);

	/* config gpmi and bch clock to 100 MHz */
	clrsetbits_le32(&mxc_ccm->cs2cdr,
			MXC_CCM_CS2CDR_ENFC_CLK_PODF_MASK |
			MXC_CCM_CS2CDR_ENFC_CLK_PRED_MASK |
			MXC_CCM_CS2CDR_ENFC_CLK_SEL_MASK,
			MXC_CCM_CS2CDR_ENFC_CLK_PODF(0) |
			MXC_CCM_CS2CDR_ENFC_CLK_PRED(3) |
			MXC_CCM_CS2CDR_ENFC_CLK_SEL(3));

	/* enable ENFC_CLK_ROOT clock */
	setbits_le32(&mxc_ccm->CCGR2, MXC_CCM_CCGR2_IOMUX_IPT_CLK_IO_MASK);

	/* 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_OFFSET);

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

#if defined(CONFIG_VIDEO_IPUV3)
static iomux_v3_cfg_t const rgb_pads[] = {
	IOMUX_PADS(PAD_DI0_DISP_CLK__IPU1_DI0_DISP_CLK),
	IOMUX_PADS(PAD_DI0_PIN15__IPU1_DI0_PIN15),
	IOMUX_PADS(PAD_DI0_PIN2__IPU1_DI0_PIN02),
	IOMUX_PADS(PAD_DI0_PIN3__IPU1_DI0_PIN03),
	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),
};

static void enable_rgb(struct display_info_t const *dev)
{
	SETUP_IOMUX_PADS(rgb_pads);
}

struct display_info_t const displays[] = {
	{
		.bus	= -1,
		.addr	= 0,
		.pixfmt	= IPU_PIX_FMT_RGB666,
		.detect	= NULL,
		.enable	= enable_rgb,
		.mode	= {
			.name           = "Amp-WD",
			.refresh        = 60,
			.xres           = 800,
			.yres           = 480,
			.pixclock       = 30000,
			.left_margin    = 30,
			.right_margin   = 30,
			.upper_margin   = 5,
			.lower_margin   = 5,
			.hsync_len      = 64,
			.vsync_len      = 20,
			.sync           = FB_SYNC_EXT,
			.vmode          = FB_VMODE_NONINTERLACED
		}
	},
};

size_t display_count = ARRAY_SIZE(displays);

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;

	enable_ipu_clock();

	/* Turn on LDB0,IPU,IPU DI0 clocks */
	reg = __raw_readl(&mxc_ccm->CCGR3);
	reg |=  (MXC_CCM_CCGR3_LDB_DI0_MASK | 0xffff);
	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;
	writel(reg, &mxc_ccm->cscmr2);

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

	reg = IOMUXC_GPR2_BGREF_RRMODE_EXTERNAL_RES |
		IOMUXC_GPR2_DI1_VS_POLARITY_ACTIVE_HIGH |
		IOMUXC_GPR2_DI0_VS_POLARITY_ACTIVE_LOW |
		IOMUXC_GPR2_BIT_MAPPING_CH1_SPWG |
		IOMUXC_GPR2_DATA_WIDTH_CH1_18BIT |
		IOMUXC_GPR2_BIT_MAPPING_CH0_SPWG |
		IOMUXC_GPR2_DATA_WIDTH_CH0_18BIT |
		IOMUXC_GPR2_LVDS_CH1_MODE_DISABLED |
		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_MUX_SRC_IPU1_DI0 <<
		IOMUXC_GPR3_LVDS0_MUX_CTL_OFFSET);
	writel(reg, &iomux->gpr[3]);
}
#endif /* CONFIG_VIDEO_IPUV3 */

#ifdef CONFIG_ENV_IS_IN_MMC
int board_mmc_get_env_dev(int devno)
{
	/* i.CoreM6 RQS has USDHC3 for SD and USDHC4 for eMMC */
	return (devno == 0) ? 0: (devno - 1);
}
#endif