root/drivers/usb/core/otg_whitelist.h

INCLUDED FROM

DEFINITIONS

1. is_targeted

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * drivers/usb/core/otg_whitelist.h
   4  *
   5  * Copyright (C) 2004 Texas Instruments
   6  */
   7 
   8 /*
   9  * This OTG and Embedded Host Whitelist is "Targeted Peripheral List".
  10  * It should mostly use of USB_DEVICE() or USB_DEVICE_VER() entries..
  11  *
  12  * YOU _SHOULD_ CHANGE THIS LIST TO MATCH YOUR PRODUCT AND ITS TESTING!
  13  */
  14 
  15 static struct usb_device_id whitelist_table[] = {
  16 
  17 /* hubs are optional in OTG, but very handy ... */
  18 { USB_DEVICE_INFO(USB_CLASS_HUB, 0, 0), },
  19 { USB_DEVICE_INFO(USB_CLASS_HUB, 0, 1), },
  20 
  21 #ifdef  CONFIG_USB_PRINTER              /* ignoring nonstatic linkage! */
  22 /* FIXME actually, printers are NOT supposed to use device classes;
  23  * they're supposed to use interface classes...
  24  */
  25 { USB_DEVICE_INFO(7, 1, 1) },
  26 { USB_DEVICE_INFO(7, 1, 2) },
  27 { USB_DEVICE_INFO(7, 1, 3) },
  28 #endif
  29 
  30 #ifdef  CONFIG_USB_NET_CDCETHER
  31 /* Linux-USB CDC Ethernet gadget */
  32 { USB_DEVICE(0x0525, 0xa4a1), },
  33 /* Linux-USB CDC Ethernet + RNDIS gadget */
  34 { USB_DEVICE(0x0525, 0xa4a2), },
  35 #endif
  36 
  37 #if     IS_ENABLED(CONFIG_USB_TEST)
  38 /* gadget zero, for testing */
  39 { USB_DEVICE(0x0525, 0xa4a0), },
  40 #endif
  41 
  42 { }     /* Terminating entry */
  43 };
  44 
  45 static int is_targeted(struct usb_device *dev)
  46 {
  47         struct usb_device_id    *id = whitelist_table;
  48 
  49         /* HNP test device is _never_ targeted (see OTG spec 6.6.6) */
  50         if ((le16_to_cpu(dev->descriptor.idVendor) == 0x1a0a &&
  51              le16_to_cpu(dev->descriptor.idProduct) == 0xbadd))
  52                 return 0;
  53 
  54         /* OTG PET device is always targeted (see OTG 2.0 ECN 6.4.2) */
  55         if ((le16_to_cpu(dev->descriptor.idVendor) == 0x1a0a &&
  56              le16_to_cpu(dev->descriptor.idProduct) == 0x0200))
  57                 return 1;
  58 
  59         /* NOTE: can't use usb_match_id() since interface caches
  60          * aren't set up yet. this is cut/paste from that code.
  61          */
  62         for (id = whitelist_table; id->match_flags; id++) {
  63                 if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
  64                     id->idVendor != le16_to_cpu(dev->descriptor.idVendor))
  65                         continue;
  66 
  67                 if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) &&
  68                     id->idProduct != le16_to_cpu(dev->descriptor.idProduct))
  69                         continue;
  70 
  71                 /* No need to test id->bcdDevice_lo != 0, since 0 is never
  72                    greater than any unsigned number. */
  73                 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO) &&
  74                     (id->bcdDevice_lo > le16_to_cpu(dev->descriptor.bcdDevice)))
  75                         continue;
  76 
  77                 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI) &&
  78                     (id->bcdDevice_hi < le16_to_cpu(dev->descriptor.bcdDevice)))
  79                         continue;
  80 
  81                 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_CLASS) &&
  82                     (id->bDeviceClass != dev->descriptor.bDeviceClass))
  83                         continue;
  84 
  85                 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_SUBCLASS) &&
  86                     (id->bDeviceSubClass != dev->descriptor.bDeviceSubClass))
  87                         continue;
  88 
  89                 if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_PROTOCOL) &&
  90                     (id->bDeviceProtocol != dev->descriptor.bDeviceProtocol))
  91                         continue;
  92 
  93                 return 1;
  94         }
  95 
  96         /* add other match criteria here ... */
  97 
  98 
  99         /* OTG MESSAGE: report errors here, customize to match your product */
 100         dev_err(&dev->dev, "device v%04x p%04x is not supported\n",
 101                 le16_to_cpu(dev->descriptor.idVendor),
 102                 le16_to_cpu(dev->descriptor.idProduct));
 103 
 104         return 0;
 105 }
 106