diff options
| -rw-r--r-- | drivers/usb/net/usbnet.c | 166 |
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 |