alistair23-linux/arch/arm/mach-imx/ehci-imx35.c

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

#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/platform_data/usb-ehci-mxc.h>

#include "ehci.h"
#include "hardware.h"

#define USBCTRL_OTGBASE_OFFSET	0x600

#define MX35_OTG_SIC_SHIFT	29
#define MX35_OTG_SIC_MASK	(0x3 << MX35_OTG_SIC_SHIFT)
#define MX35_OTG_PM_BIT		(1 << 24)
#define MX35_OTG_PP_BIT		(1 << 11)
#define MX35_OTG_OCPOL_BIT	(1 << 3)

#define MX35_H1_SIC_SHIFT	21
#define MX35_H1_SIC_MASK	(0x3 << MX35_H1_SIC_SHIFT)
#define MX35_H1_PP_BIT		(1 << 18)
#define MX35_H1_PM_BIT		(1 << 16)
#define MX35_H1_IPPUE_UP_BIT	(1 << 7)
#define MX35_H1_IPPUE_DOWN_BIT	(1 << 6)
#define MX35_H1_TLL_BIT		(1 << 5)
#define MX35_H1_USBTE_BIT	(1 << 4)
#define MX35_H1_OCPOL_BIT	(1 << 2)

int mx35_initialize_usb_hw(int port, unsigned int flags)
{
	unsigned int v;

	v = readl(MX35_IO_ADDRESS(MX35_USB_BASE_ADDR + USBCTRL_OTGBASE_OFFSET));

	switch (port) {
	case 0:	/* OTG port */
		v &= ~(MX35_OTG_SIC_MASK | MX35_OTG_PM_BIT | MX35_OTG_PP_BIT |
			MX35_OTG_OCPOL_BIT);
		v |= (flags & MXC_EHCI_INTERFACE_MASK) << MX35_OTG_SIC_SHIFT;

		if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
			v |= MX35_OTG_PM_BIT;

		if (flags & MXC_EHCI_PWR_PIN_ACTIVE_HIGH)
			v |= MX35_OTG_PP_BIT;

		if (!(flags & MXC_EHCI_OC_PIN_ACTIVE_LOW))
			v |= MX35_OTG_OCPOL_BIT;

		break;
	case 1: /* H1 port */
		v &= ~(MX35_H1_SIC_MASK | MX35_H1_PM_BIT | MX35_H1_PP_BIT |
			MX35_H1_OCPOL_BIT | MX35_H1_TLL_BIT | MX35_H1_USBTE_BIT |
			MX35_H1_IPPUE_DOWN_BIT | MX35_H1_IPPUE_UP_BIT);
		v |= (flags & MXC_EHCI_INTERFACE_MASK) << MX35_H1_SIC_SHIFT;

		if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
			v |= MX35_H1_PM_BIT;

		if (flags & MXC_EHCI_PWR_PIN_ACTIVE_HIGH)
			v |= MX35_H1_PP_BIT;

		if (!(flags & MXC_EHCI_OC_PIN_ACTIVE_LOW))
			v |= MX35_H1_OCPOL_BIT;

		if (!(flags & MXC_EHCI_TTL_ENABLED))
			v |= MX35_H1_TLL_BIT;

		if (flags & MXC_EHCI_INTERNAL_PHY)
			v |= MX35_H1_USBTE_BIT;

		if (flags & MXC_EHCI_IPPUE_DOWN)
			v |= MX35_H1_IPPUE_DOWN_BIT;

		if (flags & MXC_EHCI_IPPUE_UP)
			v |= MX35_H1_IPPUE_UP_BIT;

		break;
	default:
		return -EINVAL;
	}

	writel(v, MX35_IO_ADDRESS(MX35_USB_BASE_ADDR + USBCTRL_OTGBASE_OFFSET));

	return 0;
}