board/sielaff/imx6dl-sielaff/imx6dl-sielaff.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2022 Kontron Electronics GmbH
 */

#include <compiler.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/clock.h>
#include <asm/arch/crm_regs.h>
#include <asm/arch/mx6-pins.h>
#include <asm/io.h>
#include <init.h>

DECLARE_GLOBAL_DATA_PTR;

static const iomux_v3_cfg_t nfc_pads[] = {
	MX6_PAD_NANDF_CLE__NAND_CLE		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_ALE__NAND_ALE		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_WP_B__NAND_WP_B		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_RB0__NAND_READY_B		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_CS0__NAND_CE0_B		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_CS1__NAND_CE1_B		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_CS2__NAND_CE2_B		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_CS3__NAND_CE3_B		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_SD4_CMD__NAND_RE_B		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_SD4_CLK__NAND_WE_B		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_D0__NAND_DATA00		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_D1__NAND_DATA01		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_D2__NAND_DATA02		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_D3__NAND_DATA03		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_D4__NAND_DATA04		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_D5__NAND_DATA05		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_D6__NAND_DATA06		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_NANDF_D7__NAND_DATA07		| MUX_PAD_CTRL(NO_PAD_CTRL),
	MX6_PAD_SD4_DAT0__NAND_DQS		| MUX_PAD_CTRL(NO_PAD_CTRL),
};

int dram_init(void)
{
	gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
	return 0;
}

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

	/* config gpmi nand iomux */
	imx_iomux_v3_setup_multiple_pads(nfc_pads,
					 ARRAY_SIZE(nfc_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);
}

int board_init(void)
{
	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
	u32 reg;

	setup_gpmi_nand();

	/* Enable SPI2 clock */
	enable_spi_clk(true, 1);

	/*
	 * Configure clock output for USB hub
	 * 1. Disabling CLK01 and CLK02
	 */
	clrbits_le32(&mxc_ccm->ccosr, MXC_CCM_CCOSR_CKOL_EN);
	clrbits_le32(&mxc_ccm->ccosr, MXC_CCM_CCOSR_CKO2_EN_OFFSET);

	/*
	 * 2. Setting ccm timer - osc_clk (24 MHz) divide by 2 -> 12 Mhz
	 * CLK02_DIV: 001b CLK02_SEL: 01110b -> 0010 1110b -> 0x2e
	 */
	reg = readl(&mxc_ccm->ccosr);
	reg &= ~MXC_CCM_CCOSR_CKO2_SEL_MASK;
	reg &= ~MXC_CCM_CCOSR_CKO2_DIV_MASK;
	reg |= (0x2e << MXC_CCM_CCOSR_CKO2_SEL_OFFSET);
	writel(reg, &mxc_ccm->ccosr);

	/* 3. Enabling CLK02 on output CCM_CLK01 */
	setbits_le32(&mxc_ccm->ccosr, MXC_CCM_CCOSR_CLK_OUT_SEL);
	setbits_le32(&mxc_ccm->ccosr, MXC_CCM_CCOSR_CKO2_EN_OFFSET);

	return 0;
}