ehci-imx25.c

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/*
 * Copyright (c) 2009 Daniel Mack <[email protected]>
 * Copyright (C) 2010 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 */

#include <linux/platform_device.h>
#include <linux/io.h>

#include <mach/hardware.h>
#include <linux/platform_data/usb-ehci-mxc.h>

#define USBCTRL_OTGBASE_OFFSET  0x600

#define MX25_OTG_SIC_SHIFT  29
#define MX25_OTG_SIC_MASK   (0x3 << MX25_OTG_SIC_SHIFT)
#define MX25_OTG_PM_BIT     (1 << 24)
#define MX25_OTG_PP_BIT     (1 << 11)
#define MX25_OTG_OCPOL_BIT  (1 << 3)

#define MX25_H1_SIC_SHIFT   21
#define MX25_H1_SIC_MASK    (0x3 << MX25_H1_SIC_SHIFT)
#define MX25_H1_PP_BIT      (1 << 18)
#define MX25_H1_PM_BIT      (1 << 16)
#define MX25_H1_IPPUE_UP_BIT    (1 << 7)
#define MX25_H1_IPPUE_DOWN_BIT  (1 << 6)
#define MX25_H1_TLL_BIT     (1 << 5)
#define MX25_H1_USBTE_BIT   (1 << 4)
#define MX25_H1_OCPOL_BIT   (1 << 2)

int mx25_initialize_usb_hw(int port, unsigned int flags)
{
    unsigned int v;

    v = readl(MX25_IO_ADDRESS(MX25_USB_BASE_ADDR + USBCTRL_OTGBASE_OFFSET));

    switch (port) {
    case 0: /* OTG port */
        v &= ~(MX25_OTG_SIC_MASK | MX25_OTG_PM_BIT | MX25_OTG_PP_BIT |
            MX25_OTG_OCPOL_BIT);
        v |= (flags & MXC_EHCI_INTERFACE_MASK) << MX25_OTG_SIC_SHIFT;

        if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
            v |= MX25_OTG_PM_BIT;

        if (flags & MXC_EHCI_PWR_PIN_ACTIVE_HIGH)
            v |= MX25_OTG_PP_BIT;

        if (!(flags & MXC_EHCI_OC_PIN_ACTIVE_LOW))
            v |= MX25_OTG_OCPOL_BIT;

        break;
    case 1: /* H1 port */
        v &= ~(MX25_H1_SIC_MASK | MX25_H1_PM_BIT | MX25_H1_PP_BIT |
            MX25_H1_OCPOL_BIT | MX25_H1_TLL_BIT | MX25_H1_USBTE_BIT |
            MX25_H1_IPPUE_DOWN_BIT | MX25_H1_IPPUE_UP_BIT);
        v |= (flags & MXC_EHCI_INTERFACE_MASK) << MX25_H1_SIC_SHIFT;

        if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
            v |= MX25_H1_PM_BIT;

        if (flags & MXC_EHCI_PWR_PIN_ACTIVE_HIGH)
            v |= MX25_H1_PP_BIT;

        if (!(flags & MXC_EHCI_OC_PIN_ACTIVE_LOW))
            v |= MX25_H1_OCPOL_BIT;

        if (!(flags & MXC_EHCI_TTL_ENABLED))
            v |= MX25_H1_TLL_BIT;

        if (flags & MXC_EHCI_INTERNAL_PHY)
            v |= MX25_H1_USBTE_BIT;

        if (flags & MXC_EHCI_IPPUE_DOWN)
            v |= MX25_H1_IPPUE_DOWN_BIT;

        if (flags & MXC_EHCI_IPPUE_UP)
            v |= MX25_H1_IPPUE_UP_BIT;

        break;
    default:
        return -EINVAL;
    }

    writel(v, MX25_IO_ADDRESS(MX25_USB_BASE_ADDR + USBCTRL_OTGBASE_OFFSET));

    return 0;
}