u-boot/board/k+p/kp_imx53/kp_imx53.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2018
 * Lukasz Majewski, DENX Software Engineering, lukma@denx.de
 */

#include <common.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/crm_regs.h>
#include <asm/arch/clock.h>
#include <asm/arch/iomux-mx53.h>
#include <asm/arch/clock.h>
#include <asm/gpio.h>
#include <mmc.h>
#include <fsl_esdhc.h>
#include <power/pmic.h>
#include <fsl_pmic.h>
#include "kp_id_rev.h"

#define VBUS_PWR_EN IMX_GPIO_NR(7, 8)
#define PHY_nRST IMX_GPIO_NR(7, 6)
#define BOOSTER_OFF IMX_GPIO_NR(2, 23)
#define LCD_BACKLIGHT IMX_GPIO_NR(1, 1)

DECLARE_GLOBAL_DATA_PTR;

int dram_init(void)
{
	u32 size;

	size = get_ram_size((void *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
	gd->ram_size = size;

	return 0;
}

int dram_init_banksize(void)
{
	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
	gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;

	return 0;
}

u32 get_board_rev(void)
{
	struct iim_regs *iim = (struct iim_regs *)IMX_IIM_BASE;
	struct fuse_bank *bank = &iim->bank[0];
	struct fuse_bank0_regs *fuse =
		(struct fuse_bank0_regs *)bank->fuse_regs;

	int rev = readl(&fuse->gp[6]);

	return (get_cpu_rev() & ~(0xF << 8)) | (rev & 0xF) << 8;
}

#ifdef CONFIG_USB_EHCI_MX5
int board_ehci_hcd_init(int port)
{
	gpio_request(VBUS_PWR_EN, "VBUS_PWR_EN");
	gpio_direction_output(VBUS_PWR_EN, 1);
	return 0;
}
#endif

#ifdef CONFIG_FSL_ESDHC
struct fsl_esdhc_cfg esdhc_cfg[] = {
	{MMC_SDHC3_BASE_ADDR},
};

int board_mmc_getcd(struct mmc *mmc)
{
	return 1; /* eMMC is always present */
}

#define SD_CMD_PAD_CTRL		(PAD_CTL_HYS | PAD_CTL_DSE_HIGH | \
				 PAD_CTL_PUS_100K_UP)
#define SD_PAD_CTRL		(PAD_CTL_HYS | PAD_CTL_PUS_47K_UP | \
				 PAD_CTL_DSE_HIGH)

int board_mmc_init(bd_t *bis)
{
	int ret;

	static const iomux_v3_cfg_t sd3_pads[] = {
		NEW_PAD_CTRL(MX53_PAD_PATA_RESET_B__ESDHC3_CMD,
			     SD_CMD_PAD_CTRL),
		NEW_PAD_CTRL(MX53_PAD_PATA_IORDY__ESDHC3_CLK, SD_PAD_CTRL),
		NEW_PAD_CTRL(MX53_PAD_PATA_DATA8__ESDHC3_DAT0, SD_PAD_CTRL),
		NEW_PAD_CTRL(MX53_PAD_PATA_DATA9__ESDHC3_DAT1, SD_PAD_CTRL),
		NEW_PAD_CTRL(MX53_PAD_PATA_DATA10__ESDHC3_DAT2, SD_PAD_CTRL),
		NEW_PAD_CTRL(MX53_PAD_PATA_DATA11__ESDHC3_DAT3, SD_PAD_CTRL),
		NEW_PAD_CTRL(MX53_PAD_PATA_DATA0__ESDHC3_DAT4, SD_PAD_CTRL),
		NEW_PAD_CTRL(MX53_PAD_PATA_DATA1__ESDHC3_DAT5, SD_PAD_CTRL),
		NEW_PAD_CTRL(MX53_PAD_PATA_DATA2__ESDHC3_DAT6, SD_PAD_CTRL),
		NEW_PAD_CTRL(MX53_PAD_PATA_DATA3__ESDHC3_DAT7, SD_PAD_CTRL),
	};

	esdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
	imx_iomux_v3_setup_multiple_pads(sd3_pads, ARRAY_SIZE(sd3_pads));

	ret = fsl_esdhc_initialize(bis, &esdhc_cfg[0]);
	if (ret)
		return ret;

	return 0;
}
#endif

static int power_init(void)
{
	struct udevice *dev;
	int ret;

	ret = pmic_get("mc34708", &dev);
	if (ret) {
		printf("%s: mc34708 not found !\n", __func__);
		return ret;
	}

	/* Set VDDGP to 1.110V for 800 MHz on SW1 */
	pmic_clrsetbits(dev, REG_SW_0, SWx_VOLT_MASK_MC34708,
			SWx_1_110V_MC34708);

	/* Set VCC as 1.30V on SW2 */
	pmic_clrsetbits(dev, REG_SW_1, SWx_VOLT_MASK_MC34708,
			SWx_1_300V_MC34708);

	/* Set global reset timer to 4s */
	pmic_clrsetbits(dev, REG_POWER_CTL2, TIMER_MASK_MC34708,
			TIMER_4S_MC34708);

	return ret;
}

static void setup_clocks(void)
{
	int ret;
	u32 ref_clk = MXC_HCLK;
	/*
	 * CPU clock set to 800MHz and DDR to 400MHz
	 */
	ret = mxc_set_clock(ref_clk, 800, MXC_ARM_CLK);
	if (ret)
		printf("CPU:   Switch CPU clock to 800MHZ failed\n");

	ret = mxc_set_clock(ref_clk, 400, MXC_PERIPH_CLK);
	ret |= mxc_set_clock(ref_clk, 400, MXC_DDR_CLK);
	if (ret)
		printf("CPU:   Switch DDR clock to 400MHz failed\n");
}

static void setup_ups(void)
{
	gpio_request(BOOSTER_OFF, "BOOSTER_OFF");
	gpio_direction_output(BOOSTER_OFF, 0);
}

int board_early_init_f(void)
{
	return 0;
}

/*
 * Do not overwrite the console
 * Use always serial for U-Boot console
 */
int overwrite_console(void)
{
	return 1;
}

int board_init(void)
{
	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;

	return 0;
}

void eth_phy_reset(void)
{
	gpio_request(PHY_nRST, "PHY_nRST");
	gpio_direction_output(PHY_nRST, 1);
	udelay(50);
	gpio_set_value(PHY_nRST, 0);
	udelay(400);
	gpio_set_value(PHY_nRST, 1);
	udelay(50);
}

void board_disable_display(void)
{
	gpio_request(LCD_BACKLIGHT, "LCD_BACKLIGHT");
	gpio_direction_output(LCD_BACKLIGHT, 0);
}

int board_late_init(void)
{
	int ret = 0;

	board_disable_display();
	setup_ups();

	if (!power_init())
		setup_clocks();

	ret = read_eeprom();
	if (ret)
		printf("Error %d reading EEPROM content!\n", ret);

	eth_phy_reset();

	show_eeprom();
	read_board_id();

	return ret;
}