path: root/board/toradex/verdin-imx8mp/verdin-imx8mp.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright 2022 Toradex
 */

#include <common.h>
#include <asm/arch/clock.h>
#include <asm/arch/imx8mp_pins.h>
#include <asm/arch/sys_proto.h>
#include <asm-generic/gpio.h>
#include <asm/global_data.h>
#include <asm/mach-imx/gpio.h>
#include <asm/mach-imx/iomux-v3.h>
#include <errno.h>
#include <env.h>
#include <init.h>
#include <linux/delay.h>
#include <micrel.h>
#include <miiphy.h>
#include <netdev.h>
#include <usb.h>
#include <dwc3-uboot.h>

#include "../common/tdx-cfg-block.h"

DECLARE_GLOBAL_DATA_PTR;

#define UART_PAD_CTRL	(PAD_CTL_DSE6 | PAD_CTL_FSEL1)
#define WDOG_PAD_CTRL	(PAD_CTL_DSE6 | PAD_CTL_ODE | PAD_CTL_PUE | PAD_CTL_PE)

/* Verdin UART_3, Console/Debug UART */
static const iomux_v3_cfg_t uart_pads[] = {
	MX8MP_PAD_UART3_RXD__UART3_DCE_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
	MX8MP_PAD_UART3_TXD__UART3_DCE_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
};

static const iomux_v3_cfg_t wdog_pads[] = {
	MX8MP_PAD_GPIO1_IO02__WDOG1_WDOG_B | MUX_PAD_CTRL(WDOG_PAD_CTRL),
};

int board_early_init_f(void)
{
	struct wdog_regs *wdog = (struct wdog_regs *)WDOG1_BASE_ADDR;

	imx_iomux_v3_setup_multiple_pads(wdog_pads, ARRAY_SIZE(wdog_pads));

	set_wdog_reset(wdog);

	imx_iomux_v3_setup_multiple_pads(uart_pads, ARRAY_SIZE(uart_pads));

	init_uart_clk(2);

	return 0;
}

static void setup_fec(void)
{
	struct iomuxc_gpr_base_regs *gpr =
		(struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;

	/* Enable RGMII TX clk output */
	setbits_le32(&gpr->gpr[1], BIT(22));
}

static int setup_eqos(void)
{
	struct iomuxc_gpr_base_regs *gpr =
		(struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;

	/* set INTF as RGMII, enable RGMII TXC clock */
	clrsetbits_le32(&gpr->gpr[1],
			IOMUXC_GPR_GPR1_GPR_ENET_QOS_INTF_SEL_MASK, BIT(16));
	setbits_le32(&gpr->gpr[1], BIT(19) | BIT(21));

	return set_clk_eqos(ENET_125MHZ);
}

#if IS_ENABLED(CONFIG_NET)
int board_phy_config(struct phy_device *phydev)
{
	if (phydev->drv->config)
		phydev->drv->config(phydev);
	return 0;
}
#endif

#ifdef CONFIG_USB_DWC3

#define USB_PHY_CTRL0			0xF0040
#define USB_PHY_CTRL0_REF_SSP_EN	BIT(2)

#define USB_PHY_CTRL1			0xF0044
#define USB_PHY_CTRL1_RESET		BIT(0)
#define USB_PHY_CTRL1_COMMONONN		BIT(1)
#define USB_PHY_CTRL1_ATERESET		BIT(3)
#define USB_PHY_CTRL1_VDATSRCENB0	BIT(19)
#define USB_PHY_CTRL1_VDATDETENB0	BIT(20)

#define USB_PHY_CTRL2			0xF0048
#define USB_PHY_CTRL2_TXENABLEN0	BIT(8)

#define USB_PHY_CTRL6			0xF0058

#define HSIO_GPR_BASE					(0x32F10000U)
#define HSIO_GPR_REG_0					(HSIO_GPR_BASE)
#define HSIO_GPR_REG_0_USB_CLOCK_MODULE_EN_SHIFT	(1)
#define HSIO_GPR_REG_0_USB_CLOCK_MODULE_EN		(0x1U << HSIO_GPR_REG_0_USB_CLOCK_MODULE_EN_SHIFT)

static struct dwc3_device dwc3_device_data = {
#ifdef CONFIG_SPL_BUILD
	.maximum_speed = USB_SPEED_HIGH,
#else
	.maximum_speed = USB_SPEED_SUPER,
#endif
	.base = USB1_BASE_ADDR,
	.dr_mode = USB_DR_MODE_PERIPHERAL,
	.index = 0,
	.power_down_scale = 2,
};

int usb_gadget_handle_interrupts(void)
{
	dwc3_uboot_handle_interrupt(0);
	return 0;
}

static void dwc3_nxp_usb_phy_init(struct dwc3_device *dwc3)
{
	u32 RegData;

	/* enable usb clock via hsio gpr */
	RegData = readl(HSIO_GPR_REG_0);
	RegData |= HSIO_GPR_REG_0_USB_CLOCK_MODULE_EN;
	writel(RegData, HSIO_GPR_REG_0);

	/* USB3.0 PHY signal fsel for 100M ref */
	RegData = readl(dwc3->base + USB_PHY_CTRL0);
	RegData = (RegData & 0xfffff81f) | (0x2a<<5);
	writel(RegData, dwc3->base + USB_PHY_CTRL0);

	RegData = readl(dwc3->base + USB_PHY_CTRL6);
	RegData &=~0x1;
	writel(RegData, dwc3->base + USB_PHY_CTRL6);

	RegData = readl(dwc3->base + USB_PHY_CTRL1);
	RegData &= ~(USB_PHY_CTRL1_VDATSRCENB0 | USB_PHY_CTRL1_VDATDETENB0 |
			USB_PHY_CTRL1_COMMONONN);
	RegData |= USB_PHY_CTRL1_RESET | USB_PHY_CTRL1_ATERESET;
	writel(RegData, dwc3->base + USB_PHY_CTRL1);

	RegData = readl(dwc3->base + USB_PHY_CTRL0);
	RegData |= USB_PHY_CTRL0_REF_SSP_EN;
	writel(RegData, dwc3->base + USB_PHY_CTRL0);

	RegData = readl(dwc3->base + USB_PHY_CTRL2);
	RegData |= USB_PHY_CTRL2_TXENABLEN0;
	writel(RegData, dwc3->base + USB_PHY_CTRL2);

	RegData = readl(dwc3->base + USB_PHY_CTRL1);
	RegData &= ~(USB_PHY_CTRL1_RESET | USB_PHY_CTRL1_ATERESET);
	writel(RegData, dwc3->base + USB_PHY_CTRL1);
}
#endif

#if defined(CONFIG_USB_DWC3) || defined(CONFIG_USB_XHCI_IMX8M)
#define USB1_PWR_EN IMX_GPIO_NR(1, 12)
#define USB2_PWR_EN IMX_GPIO_NR(1, 14)
int board_usb_init(int index, enum usb_init_type init)
{
	imx8m_usb_power(index, true);

	if (index == 0 && init == USB_INIT_DEVICE) {
		dwc3_nxp_usb_phy_init(&dwc3_device_data);
		return dwc3_uboot_init(&dwc3_device_data);
	} else if (index == 0 && init == USB_INIT_HOST) {
		/* Enable GPIO1_IO12 for 5V VBUS */
		gpio_request(USB1_PWR_EN, "usb1_pwr");
		gpio_direction_output(USB1_PWR_EN, 1);
	} else if (index == 1 && init == USB_INIT_HOST) {
		/* Enable GPIO1_IO14 for 5V VBUS */
		gpio_request(USB2_PWR_EN, "usb2_pwr");
		gpio_direction_output(USB2_PWR_EN, 1);
	}

	return 0;
}

int board_usb_cleanup(int index, enum usb_init_type init)
{
	int ret = 0;
	if (index == 0 && init == USB_INIT_DEVICE) {
		dwc3_uboot_exit(index);
	} else if (index == 0 && init == USB_INIT_HOST) {
		/* Disable GPIO1_IO12 for 5V VBUS */
		gpio_direction_output(USB1_PWR_EN, 0);
	} else if (index == 1 && init == USB_INIT_HOST) {
		/* Disable GPIO1_IO14 for 5V VBUS */
		gpio_direction_output(USB2_PWR_EN, 0);
	}

	imx8m_usb_power(index, false);

	return ret;
}

#endif

int board_init(void)
{
	int ret = 0;

	if (IS_ENABLED(CONFIG_FEC_MXC))
		setup_fec();

	if (IS_ENABLED(CONFIG_DWC_ETH_QOS))
		ret = setup_eqos();

#if defined(CONFIG_USB_DWC3) || defined(CONFIG_USB_XHCI_IMX8M)
	init_usb_clk();
#endif

	return ret;
}

static void select_dt_from_module_version(void)
{
	char variant[32];
	char *env_variant = env_get("variant");
	int is_wifi = 0;

	if (IS_ENABLED(CONFIG_TDX_CFG_BLOCK)) {
		/*
		 * If we have a valid config block and it says we are a module with
		 * Wi-Fi/Bluetooth make sure we use the -wifi device tree.
		 */
		is_wifi = (tdx_hw_tag.prodid == VERDIN_IMX8MPQ_WIFI_BT_IT) ||
			  (tdx_hw_tag.prodid == VERDIN_IMX8MPQ_2GB_WIFI_BT_IT) ||
			  (tdx_hw_tag.prodid == VERDIN_IMX8MPQ_8GB_WIFI_BT) ||
			  (tdx_hw_tag.prodid == VERDIN_IMX8MPQ_8GB_WIFI_BT_IT);
	}

	if (is_wifi)
		strlcpy(&variant[0], "wifi", sizeof(variant));
	else
		strlcpy(&variant[0], "nonwifi", sizeof(variant));

	if (strcmp(variant, env_variant)) {
		printf("Setting variant to %s\n", variant);
		env_set("variant", variant);
	}
}

int board_late_init(void)
{
	select_dt_from_module_version();

	return 0;
}

int board_phys_sdram_size(phys_size_t *size)
{
	if (!size)
		return -EINVAL;

	*size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE + PHYS_SDRAM_2_SIZE);

	return 0;
}

#if IS_ENABLED(CONFIG_OF_LIBFDT) && IS_ENABLED(CONFIG_OF_BOARD_SETUP)
int ft_board_setup(void *blob, struct bd_info *bd)
{
	return ft_common_board_setup(blob, bd);
}
#endif