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