LXR linux/drivers/usb/core/otg

   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
  15static 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
  45static 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
 107