Skip to content

L
linux
Commit 0aa599c5 authored by David Brownell's avatar David Brownell Committed by Greg Kroah-Hartman
Browse files
Options

[PATCH] USB: usbnet (6/9) module for Zaurii and compatibles 

This moves usbnet support for Zaurus and compatibles into its own module.
Other than exporting a couple of helper functions, this just involved
shuffling some code and updating the comments.
Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 47ee3051
Hide whitespace changes
Inline Side-by-side
Showing with 433 additions and 367 deletions
drivers/usb/net/Kconfig
View file @ 0aa599c5
...@@ -140,23 +140,6 @@ config USB_PL2301 ...@@ -140,23 +140,6 @@ config USB_PL2301
comment "Intelligent USB Devices/Gadgets" comment "Intelligent USB Devices/Gadgets"
depends on USB_USBNET depends on USB_USBNET
config USB_ZAURUS
boolean "Sharp Zaurus (stock ROMs) and compatible"
depends on USB_USBNET
select CRC32
default y
help
Choose this option to support the usb networking links used by
Zaurus models like the SL-5000D, SL-5500, SL-5600, A-300, B-500.
This also supports some related device firmware, as used in some
PDAs from Olympus and some cell phones from Motorola.
If you install an alternate ROM image, such as the Linux 2.6 based
versions of OpenZaurus, you should no longer need to support this
protocol. Only the "eth-fd" or "net_fd" drivers in these devices
really need this non-conformant variant of CDC Ethernet (or in
some cases CDC MDLM) protocol, not "g_ether".
config USB_CDCETHER config USB_CDCETHER
boolean "CDC Ethernet support (smart devices such as cable modems)" boolean "CDC Ethernet support (smart devices such as cable modems)"
depends on USB_USBNET depends on USB_USBNET
...@@ -294,6 +277,23 @@ config USB_EPSON2888 ...@@ -294,6 +277,23 @@ config USB_EPSON2888
Choose this option to support the usb networking links used Choose this option to support the usb networking links used
by some sample firmware from Epson. by some sample firmware from Epson.
config USB_NET_ZAURUS
tristate "Sharp Zaurus (stock ROMs) and compatible"
depends on USB_USBNET
select CRC32
default y
help
Choose this option to support the usb networking links used by
Zaurus models like the SL-5000D, SL-5500, SL-5600, A-300, B-500.
This also supports some related device firmware, as used in some
PDAs from Olympus and some cell phones from Motorola.
If you install an alternate ROM image, such as the Linux 2.6 based
versions of OpenZaurus, you should no longer need to support this
protocol. Only the "eth-fd" or "net_fd" drivers in these devices
really need this non-conformant variant of CDC Ethernet (or in
some cases CDC MDLM) protocol, not "g_ether".
config USB_ZD1201 config USB_ZD1201
tristate "USB ZD1201 based Wireless device support" tristate "USB ZD1201 based Wireless device support"
......
drivers/usb/net/Makefile
View file @ 0aa599c5
...@@ -10,5 +10,6 @@ obj-$(CONFIG_USB_NET_AX8817X) += asix.o ...@@ -10,5 +10,6 @@ obj-$(CONFIG_USB_NET_AX8817X) += asix.o
obj-$(CONFIG_USB_NET_GL620A) += gl620a.o obj-$(CONFIG_USB_NET_GL620A) += gl620a.o
obj-$(CONFIG_USB_NET_NET1080) += net1080.o obj-$(CONFIG_USB_NET_NET1080) += net1080.o
obj-$(CONFIG_USB_NET_CDC_SUBSET) += cdc_subset.o obj-$(CONFIG_USB_NET_CDC_SUBSET) += cdc_subset.o
obj-$(CONFIG_USB_NET_ZAURUS) += zaurus.o
obj-$(CONFIG_USB_USBNET) += usbnet.o obj-$(CONFIG_USB_USBNET) += usbnet.o
obj-$(CONFIG_USB_ZD1201) += zd1201.o obj-$(CONFIG_USB_ZD1201) += zd1201.o
drivers/usb/net/usbnet.c
View file @ 0aa599c5
/* /*
* USB Networking Links * USB Networking Links
* Copyright (C) 2000-2005 by David Brownell * Copyright (C) 2000-2005 by David Brownell
* Copyright (C) 2002 Pavel Machek <pavel@ucw.cz>
* Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com> * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
* *
* This program is free software; you can redistribute it and/or modify * This program is free software; you can redistribute it and/or modify
...@@ -173,14 +172,6 @@ MODULE_PARM_DESC (msg_level, "Override default message level"); ...@@ -173,14 +172,6 @@ MODULE_PARM_DESC (msg_level, "Override default message level");
/*-------------------------------------------------------------------------*/ /*-------------------------------------------------------------------------*/
static u32 usbnet_get_link (struct net_device *);
/* mostly for PDA style devices, which are always connected if present */
static int always_connected (struct usbnet *dev)
{
return 0;
}
/* handles CDC Ethernet and many other network "bulk data" interfaces */ /* handles CDC Ethernet and many other network "bulk data" interfaces */
int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf) int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf)
{ {
...@@ -321,7 +312,7 @@ EXPORT_SYMBOL_GPL(usbnet_skb_return); ...@@ -321,7 +312,7 @@ EXPORT_SYMBOL_GPL(usbnet_skb_return);
#define NEED_GENERIC_CDC #define NEED_GENERIC_CDC
#endif #endif
#ifdef CONFIG_USB_ZAURUS #if defined(CONFIG_USB_ZAURUS) || defined(CONFIG_USB_ZAURUS_MODULE)
/* Ethernet variant uses funky framing, broken ethernet addressing */ /* Ethernet variant uses funky framing, broken ethernet addressing */
#define NEED_GENERIC_CDC #define NEED_GENERIC_CDC
#endif #endif
...@@ -336,14 +327,6 @@ EXPORT_SYMBOL_GPL(usbnet_skb_return); ...@@ -336,14 +327,6 @@ EXPORT_SYMBOL_GPL(usbnet_skb_return);
#include <linux/usb_cdc.h> #include <linux/usb_cdc.h>
struct cdc_state {
struct usb_cdc_header_desc *header;
struct usb_cdc_union_desc *u;
struct usb_cdc_ether_desc *ether;
struct usb_interface *control;
struct usb_interface *data;
};
static struct usb_driver usbnet_driver; static struct usb_driver usbnet_driver;
/* /*
...@@ -351,7 +334,7 @@ static struct usb_driver usbnet_driver; ...@@ -351,7 +334,7 @@ static struct usb_driver usbnet_driver;
* endpoints, activates data interface (if needed), maybe sets MTU. * endpoints, activates data interface (if needed), maybe sets MTU.
* all pure cdc, except for certain firmware workarounds. * all pure cdc, except for certain firmware workarounds.
*/ */
static int generic_cdc_bind (struct usbnet *dev, struct usb_interface *intf) int usbnet_generic_cdc_bind (struct usbnet *dev, struct usb_interface *intf)
{ {
u8 *buf = intf->cur_altsetting->extra; u8 *buf = intf->cur_altsetting->extra;
int len = intf->cur_altsetting->extralen; int len = intf->cur_altsetting->extralen;
...@@ -530,8 +513,9 @@ static int generic_cdc_bind (struct usbnet *dev, struct usb_interface *intf) ...@@ -530,8 +513,9 @@ static int generic_cdc_bind (struct usbnet *dev, struct usb_interface *intf)
dev_info (&dev->udev->dev, "bad CDC descriptors\n"); dev_info (&dev->udev->dev, "bad CDC descriptors\n");
return -ENODEV; return -ENODEV;
} }
EXPORT_SYMBOL_GPL(usbnet_generic_cdc_bind);
static void cdc_unbind (struct usbnet *dev, struct usb_interface *intf) void usbnet_cdc_unbind (struct usbnet *dev, struct usb_interface *intf)
{ {
struct cdc_state *info = (void *) &dev->data; struct cdc_state *info = (void *) &dev->data;
...@@ -551,6 +535,7 @@ static void cdc_unbind (struct usbnet *dev, struct usb_interface *intf) ...@@ -551,6 +535,7 @@ static void cdc_unbind (struct usbnet *dev, struct usb_interface *intf)
info->control = NULL; info->control = NULL;
} }
} }
EXPORT_SYMBOL_GPL(usbnet_cdc_unbind);
#endif /* NEED_GENERIC_CDC */ #endif /* NEED_GENERIC_CDC */
...@@ -657,7 +642,7 @@ static int cdc_bind (struct usbnet *dev, struct usb_interface *intf) ...@@ -657,7 +642,7 @@ static int cdc_bind (struct usbnet *dev, struct usb_interface *intf)
int status; int status;
struct cdc_state *info = (void *) &dev->data; struct cdc_state *info = (void *) &dev->data;
status = generic_cdc_bind (dev, intf); status = usbnet_generic_cdc_bind (dev, intf);
if (status < 0) if (status < 0)
return status; return status;
...@@ -679,7 +664,7 @@ static const struct driver_info cdc_info = { ...@@ -679,7 +664,7 @@ static const struct driver_info cdc_info = {
.flags = FLAG_ETHER, .flags = FLAG_ETHER,
// .check_connect = cdc_check_connect, // .check_connect = cdc_check_connect,
.bind = cdc_bind, .bind = cdc_bind,
.unbind = cdc_unbind, .unbind = usbnet_cdc_unbind,
.status = cdc_status, .status = cdc_status,
}; };
...@@ -757,239 +742,6 @@ static const struct driver_info prolific_info = { ...@@ -757,239 +742,6 @@ static const struct driver_info prolific_info = {
#endif /* CONFIG_USB_PL2301 */ #endif /* CONFIG_USB_PL2301 */
#ifdef CONFIG_USB_ZAURUS
#define HAVE_HARDWARE
#include <linux/crc32.h>
/*-------------------------------------------------------------------------
*
* Zaurus is also a SA-1110 based PDA, but one using a different driver
* (and framing) for its USB slave/gadget controller than the case above.
*
* For the current version of that driver, the main way that framing is
* nonstandard (also from perspective of the CDC ethernet model!) is a
* crc32, added to help detect when some sa1100 usb-to-memory DMA errata
* haven't been fully worked around. Also, all Zaurii use the same
* default Ethernet address.
*
* PXA based models use the same framing, and also can't implement
* set_interface properly.
*
* 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 (and other such vendors) for a while with a cluestick.
*
*-------------------------------------------------------------------------*/
static struct sk_buff *
zaurus_tx_fixup (struct usbnet *dev, struct sk_buff *skb, unsigned flags)
{
int padlen;
struct sk_buff *skb2;
padlen = 2;
if (!skb_cloned (skb)) {
int tailroom = skb_tailroom (skb);
if ((padlen + 4) <= tailroom)
goto done;
}
skb2 = skb_copy_expand (skb, 0, 4 + padlen, flags);
dev_kfree_skb_any (skb);
skb = skb2;
if (skb) {
u32 fcs;
done:
fcs = crc32_le (~0, skb->data, skb->len);
fcs = ~fcs;
*skb_put (skb, 1) = fcs & 0xff;
*skb_put (skb, 1) = (fcs>> 8) & 0xff;
*skb_put (skb, 1) = (fcs>>16) & 0xff;
*skb_put (skb, 1) = (fcs>>24) & 0xff;
}
return skb;
}
static int zaurus_bind (struct usbnet *dev, struct usb_interface *intf)
{
/* Belcarra's funky framing has other options; mostly
* TRAILERS (!) with 4 bytes CRC, and maybe 2 pad bytes.
*/
dev->net->hard_header_len += 6;
return generic_cdc_bind(dev, intf);
}
static const struct driver_info zaurus_sl5x00_info = {
.description = "Sharp Zaurus SL-5x00",
.flags = FLAG_FRAMING_Z,
.check_connect = always_connected,
.bind = zaurus_bind,
.unbind = cdc_unbind,
.tx_fixup = zaurus_tx_fixup,
};
#define ZAURUS_STRONGARM_INFO ((unsigned long)&zaurus_sl5x00_info)
static const struct driver_info zaurus_pxa_info = {
.description = "Sharp Zaurus, PXA-2xx based",
.flags = FLAG_FRAMING_Z,
.check_connect = always_connected,
.bind = zaurus_bind,
.unbind = cdc_unbind,
.tx_fixup = zaurus_tx_fixup,
};
#define ZAURUS_PXA_INFO ((unsigned long)&zaurus_pxa_info)
static const struct driver_info olympus_mxl_info = {
.description = "Olympus R1000",
.flags = FLAG_FRAMING_Z,
.check_connect = always_connected,
.bind = zaurus_bind,
.unbind = cdc_unbind,
.tx_fixup = zaurus_tx_fixup,
};
#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, safe_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 (CRC includes some padding)
* - 0x04 -- PADAFTER (some padding after CRC)
* - 0x08 -- "fermat" packet mangling (for hw bugs)
* the PADBEFORE appears not to matter; we interop
* with devices that use it and those that don't.
*/
if ((detail->bDetailData[1] & ~02) != 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 usbnet_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 */
#define ZAURUS_STRONGARM_INFO 0
#define ZAURUS_PXA_INFO 0
#define OLYMPUS_MXL_INFO 0
#endif
/*------------------------------------------------------------------------- /*-------------------------------------------------------------------------
* *
...@@ -2003,101 +1755,6 @@ static const struct usb_device_id products [] = { ...@@ -2003,101 +1755,6 @@ static const struct usb_device_id products [] = {
}, },
#endif #endif
#if defined(CONFIG_USB_ZAURUS) || defined(CONFIG_USB_CDCETHER)
/*
* SA-1100 based Sharp Zaurus ("collie"), or compatible.
* Same idea as above, but different framing.
*
* PXA-2xx based models are also lying-about-cdc.
* Some models don't even tell the same lies ...
*
* NOTE: OpenZaurus versions with 2.6 kernels won't use these entries,
* unlike the older ones with 2.4 "embedix" kernels.
*
* NOTE: These entries do double-duty, serving as blacklist entries
* whenever Zaurus support isn't enabled, but CDC Ethernet is.
*/
#define ZAURUS_MASTER_INTERFACE \
.bInterfaceClass = USB_CLASS_COMM, \
.bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET, \
.bInterfaceProtocol = USB_CDC_PROTO_NONE
{
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x8004,
ZAURUS_MASTER_INTERFACE,
.driver_info = ZAURUS_STRONGARM_INFO,
}, {
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x8005, /* A-300 */
ZAURUS_MASTER_INTERFACE,
.driver_info = ZAURUS_PXA_INFO,
}, {
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x8006, /* B-500/SL-5600 */
ZAURUS_MASTER_INTERFACE,
.driver_info = ZAURUS_PXA_INFO,
}, {
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x8007, /* C-700 */
ZAURUS_MASTER_INTERFACE,
.driver_info = ZAURUS_PXA_INFO,
}, {
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x9031, /* C-750 C-760 */
ZAURUS_MASTER_INTERFACE,
.driver_info = ZAURUS_PXA_INFO,
}, {
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x9032, /* SL-6000 */
ZAURUS_MASTER_INTERFACE,
.driver_info = ZAURUS_PXA_INFO,
}, {
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
/* reported with some C860 units */
.idProduct = 0x9050, /* C-860 */
ZAURUS_MASTER_INTERFACE,
.driver_info = ZAURUS_PXA_INFO,
},
#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 with
* direct access to their radios. (They don't conform to CDC MDLM.)
*/
{
USB_INTERFACE_INFO (USB_CLASS_COMM, USB_CDC_SUBCLASS_MDLM,
USB_CDC_PROTO_NONE),
.driver_info = (unsigned long) &bogus_mdlm_info,
},
#endif
/* Olympus has some models with a Zaurus-compatible option.
* R-1000 uses a FreeScale i.MXL cpu (ARMv4T)
*/
{
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x07B4,
.idProduct = 0x0F02, /* R-1000 */
ZAURUS_MASTER_INTERFACE,
.driver_info = OLYMPUS_MXL_INFO,
},
#endif
#ifdef CONFIG_USB_CDCETHER #ifdef CONFIG_USB_CDCETHER
{ {
/* CDC Ether uses two interfaces, not necessarily consecutive. /* CDC Ether uses two interfaces, not necessarily consecutive.
......
drivers/usb/net/usbnet.h
View file @ 0aa599c5
...@@ -126,6 +126,28 @@ extern int usbnet_resume (struct usb_interface *); ...@@ -126,6 +126,28 @@ extern int usbnet_resume (struct usb_interface *);
extern void usbnet_disconnect(struct usb_interface *); extern void usbnet_disconnect(struct usb_interface *);
/* Drivers that reuse some of the standard USB CDC infrastructure
* (notably, using multiple interfaces according to the the CDC
* union descriptor) get some helper code.
*/
struct cdc_state {
struct usb_cdc_header_desc *header;
struct usb_cdc_union_desc *u;
struct usb_cdc_ether_desc *ether;
struct usb_interface *control;
struct usb_interface *data;
};
extern int usbnet_generic_cdc_bind (struct usbnet *, struct usb_interface *);
extern void usbnet_cdc_unbind (struct usbnet *, struct usb_interface *);
/* CDC and RNDIS support the same host-chosen packet filters for IN transfers */
#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
|USB_CDC_PACKET_TYPE_ALL_MULTICAST \
|USB_CDC_PACKET_TYPE_PROMISCUOUS \
|USB_CDC_PACKET_TYPE_DIRECTED)
/* we record the state for each of our queued skbs */ /* we record the state for each of our queued skbs */
enum skb_state { enum skb_state {
illegal = 0, illegal = 0,
......
drivers/usb/net/zaurus.c 0 → 100644
View file @ 0aa599c5
/*
* Copyright (C) 2002 Pavel Machek <pavel@ucw.cz>
* Copyright (C) 2002-2005 by David Brownell
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
// #define DEBUG // error path messages, extra info
// #define VERBOSE // more; success messages
#include <linux/config.h>
#ifdef CONFIG_USB_DEBUG
# define DEBUG
#endif
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/ethtool.h>
#include <linux/workqueue.h>
#include <linux/mii.h>
#include <linux/crc32.h>
#include <linux/usb.h>
#include <linux/usb_cdc.h>
#include "usbnet.h"
/*
* All known Zaurii lie about their standards conformance. At least
* the earliest SA-1100 models lie by saying they support CDC Ethernet.
* Some later models (especially PXA-25x and PXA-27x based ones) lie
* and say they support CDC MDLM (for access to cell phone modems).
*
* There are non-Zaurus products that use these same protocols too.
*
* The annoying thing is that at the same time Sharp was developing
* that annoying standards-breaking software, the Linux community had
* a simple "CDC Subset" working reliably on the same SA-1100 hardware.
* That is, the same functionality but not violating standards.
*
* The CDC Ethernet nonconformance points are troublesome to hosts
* with a true CDC Ethernet implementation:
* - Framing appends a CRC, which the spec says drivers "must not" do;
* - Transfers data in altsetting zero, instead of altsetting 1;
* - All these peripherals use the same ethernet address.
*
* The CDC MDLM nonconformance is less immediately troublesome, since all
* MDLM implementations are quasi-proprietary anyway.
*/
static struct sk_buff *
zaurus_tx_fixup(struct usbnet *dev, struct sk_buff *skb, unsigned flags)
{
int padlen;
struct sk_buff *skb2;
padlen = 2;
if (!skb_cloned(skb)) {
int tailroom = skb_tailroom(skb);
if ((padlen + 4) <= tailroom)
goto done;
}
skb2 = skb_copy_expand(skb, 0, 4 + padlen, flags);
dev_kfree_skb_any(skb);
skb = skb2;
if (skb) {
u32 fcs;
done:
fcs = crc32_le(~0, skb->data, skb->len);
fcs = ~fcs;
*skb_put (skb, 1) = fcs & 0xff;
*skb_put (skb, 1) = (fcs>> 8) & 0xff;
*skb_put (skb, 1) = (fcs>>16) & 0xff;
*skb_put (skb, 1) = (fcs>>24) & 0xff;
}
return skb;
}
static int zaurus_bind(struct usbnet *dev, struct usb_interface *intf)
{
/* Belcarra's funky framing has other options; mostly
* TRAILERS (!) with 4 bytes CRC, and maybe 2 pad bytes.
*/
dev->net->hard_header_len += 6;
dev->rx_urb_size = dev->net->hard_header_len + dev->net->mtu;
return usbnet_generic_cdc_bind(dev, intf);
}
/* PDA style devices are always connected if present */
static int always_connected (struct usbnet *dev)
{
return 0;
}
static const struct driver_info zaurus_sl5x00_info = {
.description = "Sharp Zaurus SL-5x00",
.flags = FLAG_FRAMING_Z,
.check_connect = always_connected,
.bind = zaurus_bind,
.unbind = usbnet_cdc_unbind,
.tx_fixup = zaurus_tx_fixup,
};
#define ZAURUS_STRONGARM_INFO ((unsigned long)&zaurus_sl5x00_info)
static const struct driver_info zaurus_pxa_info = {
.description = "Sharp Zaurus, PXA-2xx based",
.flags = FLAG_FRAMING_Z,
.check_connect = always_connected,
.bind = zaurus_bind,
.unbind = usbnet_cdc_unbind,
.tx_fixup = zaurus_tx_fixup,
};
#define ZAURUS_PXA_INFO ((unsigned long)&zaurus_pxa_info)
static const struct driver_info olympus_mxl_info = {
.description = "Olympus R1000",
.flags = FLAG_FRAMING_Z,
.check_connect = always_connected,
.bind = zaurus_bind,
.unbind = usbnet_cdc_unbind,
.tx_fixup = zaurus_tx_fixup,
};
#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, safe_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 (CRC includes some padding)
* - 0x04 -- PADAFTER (some padding after CRC)
* - 0x08 -- "fermat" packet mangling (for hw bugs)
* the PADBEFORE appears not to matter; we interop
* with devices that use it and those that don't.
*/
if ((detail->bDetailData[1] & ~0x02) != 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 usbnet_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,
};
static const struct usb_device_id products [] = {
#define ZAURUS_MASTER_INTERFACE \
.bInterfaceClass = USB_CLASS_COMM, \
.bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET, \
.bInterfaceProtocol = USB_CDC_PROTO_NONE
/* SA-1100 based Sharp Zaurus ("collie"), or compatible. */
{
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x8004,
ZAURUS_MASTER_INTERFACE,
.driver_info = ZAURUS_STRONGARM_INFO,
},
/* PXA-2xx based models are also lying-about-cdc. If you add any
* more devices that claim to be CDC Ethernet, make sure they get
* added to the blacklist in cdc_ether too.
*
* NOTE: OpenZaurus versions with 2.6 kernels won't use these entries,
* unlike the older ones with 2.4 "embedix" kernels.
*/
{
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x8005, /* A-300 */
ZAURUS_MASTER_INTERFACE,
.driver_info = ZAURUS_PXA_INFO,
}, {
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x8006, /* B-500/SL-5600 */
ZAURUS_MASTER_INTERFACE,
.driver_info = ZAURUS_PXA_INFO,
}, {
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x8007, /* C-700 */
ZAURUS_MASTER_INTERFACE,
.driver_info = ZAURUS_PXA_INFO,
}, {
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x9031, /* C-750 C-760 */
ZAURUS_MASTER_INTERFACE,
.driver_info = ZAURUS_PXA_INFO,
}, {
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x9032, /* SL-6000 */
ZAURUS_MASTER_INTERFACE,
.driver_info = ZAURUS_PXA_INFO,
}, {
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
/* reported with some C860 units */
.idProduct = 0x9050, /* C-860 */
ZAURUS_MASTER_INTERFACE,
.driver_info = ZAURUS_PXA_INFO,
},
/* At least some of the newest PXA units have very different lies about
* their standards support: they claim to be cell phones offering
* direct access to their radios! (No, they don't conform to CDC MDLM.)
*/
{
USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_MDLM,
USB_CDC_PROTO_NONE),
.driver_info = (unsigned long) &bogus_mdlm_info,
},
/* Olympus has some models with a Zaurus-compatible option.
* R-1000 uses a FreeScale i.MXL cpu (ARMv4T)
*/
{
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x07B4,
.idProduct = 0x0F02, /* R-1000 */
ZAURUS_MASTER_INTERFACE,
.driver_info = OLYMPUS_MXL_INFO,
},
{ }, // END
};
MODULE_DEVICE_TABLE(usb, products);
static struct usb_driver zaurus_driver = {
.owner = THIS_MODULE,
.name = "zaurus",
.id_table = products,
.probe = usbnet_probe,
.disconnect = usbnet_disconnect,
.suspend = usbnet_suspend,
.resume = usbnet_resume,
};
static int __init zaurus_init(void)
{
return usb_register(&zaurus_driver);
}
module_init(zaurus_init);
static void __exit zaurus_exit(void)
{
usb_deregister(&zaurus_driver);
}
module_exit(zaurus_exit);
MODULE_AUTHOR("Pavel Machek, David Brownell");
MODULE_DESCRIPTION("Sharp Zaurus PDA, and compatible products");
MODULE_LICENSE("GPL");
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7