arch/tile/kernel/usb.c

   1 /*
   2  * Copyright 2012 Tilera Corporation. All Rights Reserved.
   3  *
   4  *   This program is free software; you can redistribute it and/or
   5  *   modify it under the terms of the GNU General Public License
   6  *   as published by the Free Software Foundation, version 2.
   7  *
   8  *   This program is distributed in the hope that it will be useful, but
   9  *   WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  11  *   NON INFRINGEMENT.  See the GNU General Public License for
  12  *   more details.
  13  *
  14  * Register the Tile-Gx USB interfaces as platform devices.
  15  *
  16  * The actual USB driver is just some glue (in
  17  * drivers/usb/host/[eo]hci-tilegx.c) which makes the registers available
  18  * to the standard kernel EHCI and OHCI drivers.
  19  */
  20
  21 #include <linux/dma-mapping.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/usb/tilegx.h>
  24 #include <linux/init.h>
  25 #include <linux/module.h>
  26 #include <linux/types.h>
  27
  28 static u64 ehci_dmamask = DMA_BIT_MASK(32);
  29
  30 #define USB_HOST_DEF(unit, type, dmamask) \
  31         static struct \
  32             tilegx_usb_platform_data tilegx_usb_platform_data_ ## type ## \
  33                 hci ## unit = { \
  34                 .dev_index = unit, \
  35         }; \
  36         \
  37         static struct platform_device tilegx_usb_ ## type ## hci ## unit = { \
  38                 .name           = "tilegx-" #type "hci", \
  39                 .id             = unit, \
  40                 .dev = { \
  41                         .dma_mask               = dmamask, \
  42                         .coherent_dma_mask      = DMA_BIT_MASK(32), \
  43                         .platform_data = \
  44                                 &tilegx_usb_platform_data_ ## type ## hci ## \
  45                                 unit, \
  46                 }, \
  47         };
  48
  49 USB_HOST_DEF(0, e, &ehci_dmamask)
  50 USB_HOST_DEF(0, o, NULL)
  51 USB_HOST_DEF(1, e, &ehci_dmamask)
  52 USB_HOST_DEF(1, o, NULL)
  53
  54 #undef USB_HOST_DEF
  55
  56 static struct platform_device *tilegx_usb_devices[] __initdata = {
  57         &tilegx_usb_ehci0,
  58         &tilegx_usb_ehci1,
  59         &tilegx_usb_ohci0,
  60         &tilegx_usb_ohci1,
  61 };
  62
  63 /** Add our set of possible USB devices. */
  64 static int __init tilegx_usb_init(void)
  65 {
  66         platform_add_devices(tilegx_usb_devices,
  67                              ARRAY_SIZE(tilegx_usb_devices));
  68
  69         return 0;
  70 }
  71 arch_initcall(tilegx_usb_init);