arch/arm/mach-imx/ehci-imx31.c

   1 /*
   2  * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
   3  * Copyright (C) 2010 Freescale Semiconductor, Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15
  16 #include <linux/platform_device.h>
  17 #include <linux/io.h>
  18 #include <linux/platform_data/usb-ehci-mxc.h>
  19
  20 #include "hardware.h"
  21
  22 #define USBCTRL_OTGBASE_OFFSET  0x600
  23
  24 #define MX31_OTG_SIC_SHIFT      29
  25 #define MX31_OTG_SIC_MASK       (0x3 << MX31_OTG_SIC_SHIFT)
  26 #define MX31_OTG_PM_BIT         (1 << 24)
  27
  28 #define MX31_H2_SIC_SHIFT       21
  29 #define MX31_H2_SIC_MASK        (0x3 << MX31_H2_SIC_SHIFT)
  30 #define MX31_H2_PM_BIT          (1 << 16)
  31 #define MX31_H2_DT_BIT          (1 << 5)
  32
  33 #define MX31_H1_SIC_SHIFT       13
  34 #define MX31_H1_SIC_MASK        (0x3 << MX31_H1_SIC_SHIFT)
  35 #define MX31_H1_PM_BIT          (1 << 8)
  36 #define MX31_H1_DT_BIT          (1 << 4)
  37
  38 int mx31_initialize_usb_hw(int port, unsigned int flags)
  39 {
  40         unsigned int v;
  41
  42         v = readl(MX31_IO_ADDRESS(MX31_USB_BASE_ADDR + USBCTRL_OTGBASE_OFFSET));
  43
  44         switch (port) {
  45         case 0: /* OTG port */
  46                 v &= ~(MX31_OTG_SIC_MASK | MX31_OTG_PM_BIT);
  47                 v |= (flags & MXC_EHCI_INTERFACE_MASK) << MX31_OTG_SIC_SHIFT;
  48
  49                 if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
  50                         v |= MX31_OTG_PM_BIT;
  51
  52                 break;
  53         case 1: /* H1 port */
  54                 v &= ~(MX31_H1_SIC_MASK | MX31_H1_PM_BIT | MX31_H1_DT_BIT);
  55                 v |= (flags & MXC_EHCI_INTERFACE_MASK) << MX31_H1_SIC_SHIFT;
  56
  57                 if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
  58                         v |= MX31_H1_PM_BIT;
  59
  60                 if (!(flags & MXC_EHCI_TTL_ENABLED))
  61                         v |= MX31_H1_DT_BIT;
  62
  63                 break;
  64         case 2: /* H2 port */
  65                 v &= ~(MX31_H2_SIC_MASK | MX31_H2_PM_BIT | MX31_H2_DT_BIT);
  66                 v |= (flags & MXC_EHCI_INTERFACE_MASK) << MX31_H2_SIC_SHIFT;
  67
  68                 if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
  69                         v |= MX31_H2_PM_BIT;
  70
  71                 if (!(flags & MXC_EHCI_TTL_ENABLED))
  72                         v |= MX31_H2_DT_BIT;
  73
  74                 break;
  75         default:
  76                 return -EINVAL;
  77         }
  78
  79         writel(v, MX31_IO_ADDRESS(MX31_USB_BASE_ADDR + USBCTRL_OTGBASE_OFFSET));
  80
  81         return 0;
  82 }