LXR linux/arch/arm/mach-imx/ehci-imx27.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
   4 * Copyright (C) 2010 Freescale Semiconductor, Inc.
   5 */
   6
   7#include <linux/platform_device.h>
   8#include <linux/io.h>
   9#include <linux/platform_data/usb-ehci-mxc.h>
  10
  11#include "ehci.h"
  12#include "hardware.h"
  13
  14#define USBCTRL_OTGBASE_OFFSET  0x600
  15
  16#define MX27_OTG_SIC_SHIFT      29
  17#define MX27_OTG_SIC_MASK       (0x3 << MX27_OTG_SIC_SHIFT)
  18#define MX27_OTG_PM_BIT         (1 << 24)
  19
  20#define MX27_H2_SIC_SHIFT       21
  21#define MX27_H2_SIC_MASK        (0x3 << MX27_H2_SIC_SHIFT)
  22#define MX27_H2_PM_BIT          (1 << 16)
  23#define MX27_H2_DT_BIT          (1 << 5)
  24
  25#define MX27_H1_SIC_SHIFT       13
  26#define MX27_H1_SIC_MASK        (0x3 << MX27_H1_SIC_SHIFT)
  27#define MX27_H1_PM_BIT          (1 << 8)
  28#define MX27_H1_DT_BIT          (1 << 4)
  29
  30int mx27_initialize_usb_hw(int port, unsigned int flags)
  31{
  32        unsigned int v;
  33
  34        v = readl(MX27_IO_ADDRESS(MX27_USB_BASE_ADDR + USBCTRL_OTGBASE_OFFSET));
  35
  36        switch (port) {
  37        case 0: /* OTG port */
  38                v &= ~(MX27_OTG_SIC_MASK | MX27_OTG_PM_BIT);
  39                v |= (flags & MXC_EHCI_INTERFACE_MASK) << MX27_OTG_SIC_SHIFT;
  40
  41                if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
  42                        v |= MX27_OTG_PM_BIT;
  43                break;
  44        case 1: /* H1 port */
  45                v &= ~(MX27_H1_SIC_MASK | MX27_H1_PM_BIT | MX27_H1_DT_BIT);
  46                v |= (flags & MXC_EHCI_INTERFACE_MASK) << MX27_H1_SIC_SHIFT;
  47
  48                if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
  49                        v |= MX27_H1_PM_BIT;
  50
  51                if (!(flags & MXC_EHCI_TTL_ENABLED))
  52                        v |= MX27_H1_DT_BIT;
  53
  54                break;
  55        case 2: /* H2 port */
  56                v &= ~(MX27_H2_SIC_MASK | MX27_H2_PM_BIT | MX27_H2_DT_BIT);
  57                v |= (flags & MXC_EHCI_INTERFACE_MASK) << MX27_H2_SIC_SHIFT;
  58
  59                if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
  60                        v |= MX27_H2_PM_BIT;
  61
  62                if (!(flags & MXC_EHCI_TTL_ENABLED))
  63                        v |= MX27_H2_DT_BIT;
  64
  65                break;
  66        default:
  67                return -EINVAL;
  68        }
  69
  70        writel(v, MX27_IO_ADDRESS(MX27_USB_BASE_ADDR + USBCTRL_OTGBASE_OFFSET));
  71
  72        return 0;
  73}
  74
  75