drivers/usb/host/ehci-mx5.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
 * Copyright (C) 2010 Freescale Semiconductor, Inc.
 */

#include <log.h>
#include <usb.h>
#include <errno.h>
#include <linux/compiler.h>
#include <linux/delay.h>
#include <usb/ehci-ci.h>
#include <asm/global_data.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/clock.h>
#include <dm.h>
#include <power/regulator.h>

#include "ehci.h"

#define MX5_USBOTHER_REGS_OFFSET 0x800

#define MXC_OTG_OFFSET			0
#define MXC_H1_OFFSET			0x200
#define MXC_H2_OFFSET			0x400
#define MXC_H3_OFFSET			0x600

#define MXC_USBCTRL_OFFSET		0
#define MXC_USB_PHY_CTR_FUNC_OFFSET	0x8
#define MXC_USB_PHY_CTR_FUNC2_OFFSET	0xc
#define MXC_USB_CTRL_1_OFFSET		0x10
#define MXC_USBH2CTRL_OFFSET		0x14
#define MXC_USBH3CTRL_OFFSET		0x18

/* USB_CTRL */
/* OTG wakeup intr enable */
#define MXC_OTG_UCTRL_OWIE_BIT		(1 << 27)
/* OTG power mask */
#define MXC_OTG_UCTRL_OPM_BIT		(1 << 24)
/* OTG power pin polarity */
#define MXC_OTG_UCTRL_O_PWR_POL_BIT	(1 << 24)
/* Host1 ULPI interrupt enable */
#define MXC_H1_UCTRL_H1UIE_BIT		(1 << 12)
/* HOST1 wakeup intr enable */
#define MXC_H1_UCTRL_H1WIE_BIT		(1 << 11)
/* HOST1 power mask */
#define MXC_H1_UCTRL_H1PM_BIT		(1 << 8)
/* HOST1 power pin polarity */
#define MXC_H1_UCTRL_H1_PWR_POL_BIT	(1 << 8)

/* USB_PHY_CTRL_FUNC */
/* OTG Polarity of Overcurrent */
#define MXC_OTG_PHYCTRL_OC_POL_BIT	(1 << 9)
/* OTG Disable Overcurrent Event */
#define MXC_OTG_PHYCTRL_OC_DIS_BIT	(1 << 8)
/* UH1 Polarity of Overcurrent */
#define MXC_H1_OC_POL_BIT		(1 << 6)
/* UH1 Disable Overcurrent Event */
#define MXC_H1_OC_DIS_BIT		(1 << 5)
/* OTG Power Pin Polarity */
#define MXC_OTG_PHYCTRL_PWR_POL_BIT	(1 << 3)

/* USBH2CTRL */
#define MXC_H2_UCTRL_H2_OC_POL_BIT	(1 << 31)
#define MXC_H2_UCTRL_H2_OC_DIS_BIT	(1 << 30)
#define MXC_H2_UCTRL_H2UIE_BIT		(1 << 8)
#define MXC_H2_UCTRL_H2WIE_BIT		(1 << 7)
#define MXC_H2_UCTRL_H2PM_BIT		(1 << 4)
#define MXC_H2_UCTRL_H2_PWR_POL_BIT	(1 << 4)

/* USBH3CTRL */
#define MXC_H3_UCTRL_H3_OC_POL_BIT	(1 << 31)
#define MXC_H3_UCTRL_H3_OC_DIS_BIT	(1 << 30)
#define MXC_H3_UCTRL_H3UIE_BIT		(1 << 8)
#define MXC_H3_UCTRL_H3WIE_BIT		(1 << 7)
#define MXC_H3_UCTRL_H3_PWR_POL_BIT	(1 << 4)

/* USB_CTRL_1 */
#define MXC_USB_CTRL_UH1_EXT_CLK_EN	(1 << 25)

int mxc_set_usbcontrol(int port, unsigned int flags)
{
	unsigned int v;
	void __iomem *usb_base = (void __iomem *)OTG_BASE_ADDR;
	void __iomem *usbother_base;
	int ret = 0;

	usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;

	switch (port) {
	case 0:	/* OTG port */
		if (flags & MXC_EHCI_INTERNAL_PHY) {
			v = __raw_readl(usbother_base +
					MXC_USB_PHY_CTR_FUNC_OFFSET);
			if (flags & MXC_EHCI_OC_PIN_ACTIVE_LOW)
				v |= MXC_OTG_PHYCTRL_OC_POL_BIT;
			else
				v &= ~MXC_OTG_PHYCTRL_OC_POL_BIT;
			if (flags & MXC_EHCI_POWER_PINS_ENABLED)
				/* OC/USBPWR is used */
				v &= ~MXC_OTG_PHYCTRL_OC_DIS_BIT;
			else
				/* OC/USBPWR is not used */
				v |= MXC_OTG_PHYCTRL_OC_DIS_BIT;
#ifdef CONFIG_MX51
			if (flags & MXC_EHCI_PWR_PIN_ACTIVE_HIGH)
				v |= MXC_OTG_PHYCTRL_PWR_POL_BIT;
			else
				v &= ~MXC_OTG_PHYCTRL_PWR_POL_BIT;
#endif
			__raw_writel(v, usbother_base +
					MXC_USB_PHY_CTR_FUNC_OFFSET);

			v = __raw_readl(usbother_base + MXC_USBCTRL_OFFSET);
#ifdef CONFIG_MX51
			if (flags & MXC_EHCI_POWER_PINS_ENABLED)
				v &= ~MXC_OTG_UCTRL_OPM_BIT;
			else
				v |= MXC_OTG_UCTRL_OPM_BIT;
#endif
#ifdef CONFIG_MX53
			if (flags & MXC_EHCI_PWR_PIN_ACTIVE_HIGH)
				v |= MXC_OTG_UCTRL_O_PWR_POL_BIT;
			else
				v &= ~MXC_OTG_UCTRL_O_PWR_POL_BIT;
#endif
			__raw_writel(v, usbother_base + MXC_USBCTRL_OFFSET);
		}
		break;
	case 1:	/* Host 1 ULPI */
#ifdef CONFIG_MX51
		/* The clock for the USBH1 ULPI port will come externally
		   from the PHY. */
		v = __raw_readl(usbother_base + MXC_USB_CTRL_1_OFFSET);
		__raw_writel(v | MXC_USB_CTRL_UH1_EXT_CLK_EN, usbother_base +
				MXC_USB_CTRL_1_OFFSET);
#endif

		v = __raw_readl(usbother_base + MXC_USBCTRL_OFFSET);
#ifdef CONFIG_MX51
		if (flags & MXC_EHCI_POWER_PINS_ENABLED)
			v &= ~MXC_H1_UCTRL_H1PM_BIT; /* H1 power mask unused */
		else
			v |= MXC_H1_UCTRL_H1PM_BIT; /* H1 power mask used */
#endif
#ifdef CONFIG_MX53
		if (flags & MXC_EHCI_PWR_PIN_ACTIVE_HIGH)
			v |= MXC_H1_UCTRL_H1_PWR_POL_BIT;
		else
			v &= ~MXC_H1_UCTRL_H1_PWR_POL_BIT;
#endif
		__raw_writel(v, usbother_base + MXC_USBCTRL_OFFSET);

		v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC_OFFSET);
		if (flags & MXC_EHCI_OC_PIN_ACTIVE_LOW)
			v |= MXC_H1_OC_POL_BIT;
		else
			v &= ~MXC_H1_OC_POL_BIT;
		if (flags & MXC_EHCI_POWER_PINS_ENABLED)
			v &= ~MXC_H1_OC_DIS_BIT; /* OC is used */
		else
			v |= MXC_H1_OC_DIS_BIT; /* OC is not used */
		__raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC_OFFSET);

		break;
	case 2: /* Host 2 ULPI */
		v = __raw_readl(usbother_base + MXC_USBH2CTRL_OFFSET);
#ifdef CONFIG_MX51
		if (flags & MXC_EHCI_POWER_PINS_ENABLED)
			v &= ~MXC_H2_UCTRL_H2PM_BIT; /* H2 power mask unused */
		else
			v |= MXC_H2_UCTRL_H2PM_BIT; /* H2 power mask used */
#endif
#ifdef CONFIG_MX53
		if (flags & MXC_EHCI_OC_PIN_ACTIVE_LOW)
			v |= MXC_H2_UCTRL_H2_OC_POL_BIT;
		else
			v &= ~MXC_H2_UCTRL_H2_OC_POL_BIT;
		if (flags & MXC_EHCI_POWER_PINS_ENABLED)
			v &= ~MXC_H2_UCTRL_H2_OC_DIS_BIT; /* OC is used */
		else
			v |= MXC_H2_UCTRL_H2_OC_DIS_BIT; /* OC is not used */
		if (flags & MXC_EHCI_PWR_PIN_ACTIVE_HIGH)
			v |= MXC_H2_UCTRL_H2_PWR_POL_BIT;
		else
			v &= ~MXC_H2_UCTRL_H2_PWR_POL_BIT;
#endif
		__raw_writel(v, usbother_base + MXC_USBH2CTRL_OFFSET);
		break;
#ifdef CONFIG_MX53
	case 3: /* Host 3 ULPI */
		v = __raw_readl(usbother_base + MXC_USBH3CTRL_OFFSET);
		if (flags & MXC_EHCI_OC_PIN_ACTIVE_LOW)
			v |= MXC_H3_UCTRL_H3_OC_POL_BIT;
		else
			v &= ~MXC_H3_UCTRL_H3_OC_POL_BIT;
		if (flags & MXC_EHCI_POWER_PINS_ENABLED)
			v &= ~MXC_H3_UCTRL_H3_OC_DIS_BIT; /* OC is used */
		else
			v |= MXC_H3_UCTRL_H3_OC_DIS_BIT; /* OC is not used */
		if (flags & MXC_EHCI_PWR_PIN_ACTIVE_HIGH)
			v |= MXC_H3_UCTRL_H3_PWR_POL_BIT;
		else
			v &= ~MXC_H3_UCTRL_H3_PWR_POL_BIT;
		__raw_writel(v, usbother_base + MXC_USBH3CTRL_OFFSET);
		break;
#endif
	}

	return ret;
}

int __weak board_ehci_hcd_init(int port)
{
	return 0;
}

void __weak board_ehci_hcd_postinit(struct usb_ehci *ehci, int port)
{
}

__weak void mx5_ehci_powerup_fixup(struct ehci_ctrl *ctrl, uint32_t *status_reg,
				   uint32_t *reg)
{
	mdelay(50);
}

struct ehci_mx5_priv_data {
	struct ehci_ctrl ctrl;
	struct usb_ehci *ehci;
	struct udevice *vbus_supply;
	enum usb_init_type init_type;
	int portnr;
};

static const struct ehci_ops mx5_ehci_ops = {
	.powerup_fixup		= mx5_ehci_powerup_fixup,
};

static int ehci_usb_of_to_plat(struct udevice *dev)
{
	struct usb_plat *plat = dev_get_plat(dev);
	const char *mode;

	mode = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "dr_mode", NULL);
	if (mode) {
		if (strcmp(mode, "peripheral") == 0)
			plat->init_type = USB_INIT_DEVICE;
		else if (strcmp(mode, "host") == 0)
			plat->init_type = USB_INIT_HOST;
		else
			return -EINVAL;
	}

	return 0;
}

static int ehci_usb_probe(struct udevice *dev)
{
	struct usb_plat *plat = dev_get_plat(dev);
	struct usb_ehci *ehci = dev_read_addr_ptr(dev);
	struct ehci_mx5_priv_data *priv = dev_get_priv(dev);
	enum usb_init_type type = plat->init_type;
	struct ehci_hccr *hccr;
	struct ehci_hcor *hcor;
	int ret;

	set_usboh3_clk();
	enable_usboh3_clk(true);
	set_usb_phy_clk();
	enable_usb_phy1_clk(true);
	enable_usb_phy2_clk(true);
	mdelay(1);

	priv->ehci = ehci;
	priv->portnr = dev_seq(dev);
	priv->init_type = type;

	ret = device_get_supply_regulator(dev, "vbus-supply",
					  &priv->vbus_supply);
	if (ret)
		debug("%s: No vbus supply\n", dev->name);

	if (!ret && priv->vbus_supply) {
		ret = regulator_set_enable(priv->vbus_supply,
					   (type == USB_INIT_DEVICE) ?
					   false : true);
		if (ret) {
			puts("Error enabling VBUS supply\n");
			return ret;
		}
	}

	hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
	hcor = (struct ehci_hcor *)((uint32_t)hccr +
			HC_LENGTH(ehci_readl(&(hccr)->cr_capbase)));
	setbits_le32(&ehci->usbmode, CM_HOST);

	__raw_writel(CFG_MXC_USB_PORTSC, &ehci->portsc);
	setbits_le32(&ehci->portsc, USB_EN);

	mxc_set_usbcontrol(priv->portnr, CFG_MXC_USB_FLAGS);
	mdelay(10);

	return ehci_register(dev, hccr, hcor, &mx5_ehci_ops, 0,
			     priv->init_type);
}

static const struct udevice_id mx5_usb_ids[] = {
	{ .compatible = "fsl,imx53-usb" },
	{ }
};

U_BOOT_DRIVER(usb_mx5) = {
	.name	= "ehci_mx5",
	.id	= UCLASS_USB,
	.of_match = mx5_usb_ids,
	.of_to_plat = ehci_usb_of_to_plat,
	.probe	= ehci_usb_probe,
	.remove = ehci_deregister,
	.ops	= &ehci_usb_ops,
	.plat_auto	= sizeof(struct usb_plat),
	.priv_auto	= sizeof(struct ehci_mx5_priv_data),
	.flags	= DM_FLAG_ALLOC_PRIV_DMA,
};