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   1 /*
   2  * drivers/usb/core/otg_whitelist.h
   3  *
   4  * Copyright (C) 2004 Texas Instruments
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 /*
  13  * This OTG Whitelist is the OTG "Targeted Peripheral List".  It should
  14  * mostly use of USB_DEVICE() or USB_DEVICE_VER() entries..
  15  *
  16  * YOU _SHOULD_ CHANGE THIS LIST TO MATCH YOUR PRODUCT AND ITS TESTING!
  17  */
  18
  19 static struct usb_device_id whitelist_table [] = {
  20
  21 /* hubs are optional in OTG, but very handy ... */
  22 { USB_DEVICE_INFO(USB_CLASS_HUB, 0, 0), },
  23 { USB_DEVICE_INFO(USB_CLASS_HUB, 0, 1), },
  24
  25 #ifdef  CONFIG_USB_PRINTER              /* ignoring nonstatic linkage! */
  26 /* FIXME actually, printers are NOT supposed to use device classes;
  27  * they're supposed to use interface classes...
  28  */
  29 { USB_DEVICE_INFO(7, 1, 1) },
  30 { USB_DEVICE_INFO(7, 1, 2) },
  31 { USB_DEVICE_INFO(7, 1, 3) },
  32 #endif
  33
  34 #ifdef  CONFIG_USB_NET_CDCETHER
  35 /* Linux-USB CDC Ethernet gadget */
  36 { USB_DEVICE(0x0525, 0xa4a1), },
  37 /* Linux-USB CDC Ethernet + RNDIS gadget */
  38 { USB_DEVICE(0x0525, 0xa4a2), },
  39 #endif
  40
  41 #if     defined(CONFIG_USB_TEST) || defined(CONFIG_USB_TEST_MODULE)
  42 /* gadget zero, for testing */
  43 { USB_DEVICE(0x0525, 0xa4a0), },
  44 #endif
  45
  46 { }     /* Terminating entry */
  47 };
  48
  49 static int is_targeted(struct usb_device *dev)
  50 {
  51         struct usb_device_id    *id = whitelist_table;
  52
  53         /* possible in developer configs only! */
  54         if (!dev->bus->otg_port)
  55                 return 1;
  56
  57         /* HNP test device is _never_ targeted (see OTG spec 6.6.6) */
  58         if ((le16_to_cpu(dev->descriptor.idVendor) == 0x1a0a &&
  59              le16_to_cpu(dev->descriptor.idProduct) == 0xbadd))
  60                 return 0;
  61
  62         /* NOTE: can't use usb_match_id() since interface caches
  63          * aren't set up yet. this is cut/paste from that code.
  64          */
  65         for (id = whitelist_table; id->match_flags; id++) {
  66                 if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
  67                     id->idVendor != le16_to_cpu(dev->descriptor.idVendor))
  68                         continue;
  69
  70                 if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) &&
  71                     id->idProduct != le16_to_cpu(dev->descriptor.idProduct))
  72                         continue;
  73
  74                 /* No need to test id->bcdDevice_lo != 0, since 0 is never
  75                    greater than any unsigned number. */
  76                 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO) &&
  77                     (id->bcdDevice_lo > le16_to_cpu(dev->descriptor.bcdDevice)))
  78                         continue;
  79
  80                 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI) &&
  81                     (id->bcdDevice_hi < le16_to_cpu(dev->descriptor.bcdDevice)))
  82                         continue;
  83
  84                 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_CLASS) &&
  85                     (id->bDeviceClass != dev->descriptor.bDeviceClass))
  86                         continue;
  87
  88                 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_SUBCLASS) &&
  89                     (id->bDeviceSubClass != dev->descriptor.bDeviceSubClass))
  90                         continue;
  91
  92                 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_PROTOCOL) &&
  93                     (id->bDeviceProtocol != dev->descriptor.bDeviceProtocol))
  94                         continue;
  95
  96                 return 1;
  97         }
  98
  99         /* add other match criteria here ... */
 100
 101
 102         /* OTG MESSAGE: report errors here, customize to match your product */
 103         dev_err(&dev->dev, "device v%04x p%04x is not supported\n",
 104                 le16_to_cpu(dev->descriptor.idVendor),
 105                 le16_to_cpu(dev->descriptor.idProduct));
 106 #ifdef  CONFIG_USB_OTG_WHITELIST
 107         return 0;
 108 #else
 109         return 1;
 110 #endif
 111 }
 112