summaryrefslogtreecommitdiffstats
path: root/drivers
diff options
context:
space:
mode:
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/net/usbnet.c166
1 files changed, 135 insertions, 31 deletions
diff --git a/drivers/usb/net/usbnet.c b/drivers/usb/net/usbnet.c
index 0eefc14449aa..1748159e462e 100644
--- a/drivers/usb/net/usbnet.c
+++ b/drivers/usb/net/usbnet.c
@@ -1,6 +1,6 @@
/*
* USB Networking Links
- * Copyright (C) 2000-2003 by David Brownell <dbrownell@users.sourceforge.net>
+ * Copyright (C) 2000-2005 by David Brownell <dbrownell@users.sourceforge.net>
* Copyright (C) 2002 Pavel Machek <pavel@ucw.cz>
* Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
* Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
@@ -2657,7 +2657,7 @@ static const struct driver_info blob_info = {
* All known Zaurii lie about their standards conformance. Most lie by
* saying they support CDC Ethernet. Some lie and say they support CDC
* MDLM (as if for access to cell phone modems). Someone, please beat
- * on Sharp for a while with a cluestick.
+ * on Sharp (and other such vendors) for a while with a cluestick.
*
*-------------------------------------------------------------------------*/
@@ -2710,13 +2710,6 @@ static const struct driver_info zaurus_pxa_info = {
};
#define ZAURUS_PXA_INFO ((unsigned long)&zaurus_pxa_info)
-static const struct driver_info zaurus_pxa_mdlm_info = {
- .description = "Sharp Zaurus, PXA-255 based",
- .flags = FLAG_FRAMING_Z,
- .check_connect = always_connected,
- .tx_fixup = zaurus_tx_fixup,
-};
-
static const struct driver_info olympus_mxl_info = {
.description = "Olympus R1000",
.flags = FLAG_FRAMING_Z,
@@ -2727,6 +2720,133 @@ static const struct driver_info olympus_mxl_info = {
};
#define OLYMPUS_MXL_INFO ((unsigned long)&olympus_mxl_info)
+
+/* Some more recent products using Lineo/Belcarra code will wrongly claim
+ * CDC MDLM conformance. They aren't conformant: data endpoints live
+ * in the control interface, there's no data interface, and it's not used
+ * to talk to a cell phone radio. But at least we can detect these two
+ * pseudo-classes, rather than growing this product list with entries for
+ * each new nonconformant product (sigh).
+ */
+static const u8 safe_guid[16] = {
+ 0x5d, 0x34, 0xcf, 0x66, 0x11, 0x18, 0x11, 0xd6,
+ 0xa2, 0x1a, 0x00, 0x01, 0x02, 0xca, 0x9a, 0x7f,
+};
+static const u8 blan_guid[16] = {
+ 0x74, 0xf0, 0x3d, 0xbd, 0x1e, 0xc1, 0x44, 0x70,
+ 0xa3, 0x67, 0x71, 0x34, 0xc9, 0xf5, 0x54, 0x37,
+};
+
+static int blan_mdlm_bind (struct usbnet *dev, struct usb_interface *intf)
+{
+ u8 *buf = intf->cur_altsetting->extra;
+ int len = intf->cur_altsetting->extralen;
+ struct usb_cdc_mdlm_desc *desc = NULL;
+ struct usb_cdc_mdlm_detail_desc *detail = NULL;
+
+ while (len > 3) {
+ if (buf [1] != USB_DT_CS_INTERFACE)
+ goto next_desc;
+
+ /* use bDescriptorSubType, and just verify that we get a
+ * "BLAN" (or "SAFE") descriptor.
+ */
+ switch (buf [2]) {
+ case USB_CDC_MDLM_TYPE:
+ if (desc) {
+ dev_dbg (&intf->dev, "extra MDLM\n");
+ goto bad_desc;
+ }
+ desc = (void *) buf;
+ if (desc->bLength != sizeof *desc) {
+ dev_dbg (&intf->dev, "MDLM len %u\n",
+ desc->bLength);
+ goto bad_desc;
+ }
+ /* expect bcdVersion 1.0, ignore */
+ if (memcmp(&desc->bGUID, blan_guid, 16)
+ || memcmp(&desc->bGUID, blan_guid, 16) ) {
+ /* hey, this one might _really_ be MDLM! */
+ dev_dbg (&intf->dev, "MDLM guid\n");
+ goto bad_desc;
+ }
+ break;
+ case USB_CDC_MDLM_DETAIL_TYPE:
+ if (detail) {
+ dev_dbg (&intf->dev, "extra MDLM detail\n");
+ goto bad_desc;
+ }
+ detail = (void *) buf;
+ switch (detail->bGuidDescriptorType) {
+ case 0: /* "SAFE" */
+ if (detail->bLength != (sizeof *detail + 2))
+ goto bad_detail;
+ break;
+ case 1: /* "BLAN" */
+ if (detail->bLength != (sizeof *detail + 3))
+ goto bad_detail;
+ break;
+ default:
+ goto bad_detail;
+ }
+
+ /* assuming we either noticed BLAN already, or will
+ * find it soon, there are some data bytes here:
+ * - bmNetworkCapabilities (unused)
+ * - bmDataCapabilities (bits, see below)
+ * - bPad (ignored, for PADAFTER -- BLAN-only)
+ * bits are:
+ * - 0x01 -- Zaurus framing (add CRC)
+ * - 0x02 -- PADBEFORE
+ * - 0x04 -- PADAFTER
+ * - 0x08 -- "fermat" packet mangling (for hw bugs)
+ */
+ if (detail->bDetailData[1] != 0x01) {
+ /* bmDataCapabilites == 0 would be fine too,
+ * but framing is minidriver-coupled for now.
+ */
+bad_detail:
+ dev_dbg (&intf->dev,
+ "bad MDLM detail, %d %d %d\n",
+ detail->bLength,
+ detail->bDetailData[0],
+ detail->bDetailData[2]);
+ goto bad_desc;
+ }
+ break;
+ }
+next_desc:
+ len -= buf [0]; /* bLength */
+ buf += buf [0];
+ }
+
+ if (!desc || !detail) {
+ dev_dbg (&intf->dev, "missing cdc mdlm %s%sdescriptor\n",
+ desc ? "" : "func ",
+ detail ? "" : "detail ");
+ goto bad_desc;
+ }
+
+ /* There's probably a CDC Ethernet descriptor there, but we can't
+ * rely on the Ethernet address it provides since not all vendors
+ * bother to make it unique. Likewise there's no point in tracking
+ * of the CDC event notifications.
+ */
+ return get_endpoints (dev, intf);
+
+bad_desc:
+ dev_info (&dev->udev->dev, "unsupported MDLM descriptors\n");
+ return -ENODEV;
+}
+
+static const struct driver_info bogus_mdlm_info = {
+ .description = "pseudo-MDLM (BLAN) device",
+ .flags = FLAG_FRAMING_Z,
+ .check_connect = always_connected,
+ .tx_fixup = zaurus_tx_fixup,
+ .bind = blan_mdlm_bind,
+};
+
#else
/* blacklist all those devices */
@@ -4029,30 +4149,14 @@ static const struct usb_device_id products [] = {
},
#ifdef CONFIG_USB_ZAURUS
- /* at least some (reports vary) PXA units have very different
- * lies about their standards support: they claim to be cell
- * phones giving direct radio access (which they aren't).
+ /* At least some (reports vary) PXA units have very different lies
+ * about their standards support: they claim to be cell phones with
+ * direct access to their radios. (They don't conform to CDC MDLM.)
*/
{
- .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
- | USB_DEVICE_ID_MATCH_DEVICE,
- .idVendor = 0x04DD,
- /* Sharp ROM v1.32 */
- .idProduct = 0x8006, /* SL-5600 */
- .bInterfaceClass = USB_CLASS_COMM,
- .bInterfaceSubClass = USB_CDC_SUBCLASS_MDLM,
- .bInterfaceProtocol = USB_CDC_PROTO_NONE,
- .driver_info = (unsigned long) &zaurus_pxa_mdlm_info,
-}, {
- .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
- | USB_DEVICE_ID_MATCH_DEVICE,
- .idVendor = 0x04DD,
- /* reported with some C860 units */
- .idProduct = 0x9031, /* C-860 */
- .bInterfaceClass = USB_CLASS_COMM,
- .bInterfaceSubClass = USB_CDC_SUBCLASS_MDLM,
- .bInterfaceProtocol = USB_CDC_PROTO_NONE,
- .driver_info = (unsigned long) &zaurus_pxa_mdlm_info,
+ USB_INTERFACE_INFO (USB_CLASS_COMM, USB_CDC_SUBCLASS_MDLM,
+ USB_CDC_PROTO_NONE),
+ .driver_info = (unsigned long) &bogus_mdlm_info,
},
#endif
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-01 12:54:56 +0200