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[PATCH] USB: usbnet (9/9) module for pl2301/2302 cables 

This wraps up the conversion of the "usbnet" driver structure, by
moving the Prolific PL-2201/2302 minidriver to a module of its own.
It also includes some minor cleanups to the remaining "usbnet" file,
notably removing that long changelog at the top.

Minor historical note:  Linux 2.2 first called the driver for
this hardware "plusb".

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Brownell 2005-08-31 09:54:50 -07:00 committed by Greg Kroah-Hartman
parent 64e049102d
commit 090ffa9d0e
4 changed files with 179 additions and 217 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/usb/net/Kconfig
View File

@ -125,20 +125,6 @@ config USB_USBNET
To compile this driver as a module, choose M here: the To compile this driver as a module, choose M here: the
module will be called usbnet. module will be called usbnet.
comment "USB Host-to-Host Cables"
depends on USB_USBNET
config USB_PL2301
boolean "Prolific PL-2301/2302 based cables"
default y
# handshake/init/reset problems, from original 'plusb' driver
depends on USB_USBNET && EXPERIMENTAL
help
Choose this option if you're using a host-to-host cable
with one of these chips.
comment "Drivers built using the usbnet core"
config USB_NET_AX8817X config USB_NET_AX8817X
tristate "ASIX AX88xxx Based USB 2.0 Ethernet Adapters" tristate "ASIX AX88xxx Based USB 2.0 Ethernet Adapters"
depends on USB_USBNET && NET_ETHERNET depends on USB_USBNET && NET_ETHERNET
@ -212,6 +198,15 @@ config USB_NET_NET1080
on this design: one NetChip 1080 chip and supporting logic, on this design: one NetChip 1080 chip and supporting logic,
optionally with LEDs that indicate traffic optionally with LEDs that indicate traffic
config USB_NET_PLUSB
tristate "Prolific PL-2301/2302 based cables"
# if the handshake/init/reset problems, from original 'plusb',
# are ever resolved ... then remove "experimental"
depends on USB_USBNET && EXPERIMENTAL
help
Choose this option if you're using a host-to-host cable
with one of these chips.
config USB_NET_RNDIS_HOST config USB_NET_RNDIS_HOST
tristate "Host for RNDIS devices (EXPERIMENTAL)" tristate "Host for RNDIS devices (EXPERIMENTAL)"
depends on USB_USBNET && EXPERIMENTAL depends on USB_USBNET && EXPERIMENTAL

1
drivers/usb/net/Makefile
View File

@ -10,6 +10,7 @@ obj-$(CONFIG_USB_NET_AX8817X) += asix.o
obj-$(CONFIG_USB_NET_CDCETHER) += cdc_ether.o obj-$(CONFIG_USB_NET_CDCETHER) += cdc_ether.o
obj-$(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_PLUSB) += plusb.o
obj-$(CONFIG_USB_NET_RNDIS_HOST) += rndis_host.o obj-$(CONFIG_USB_NET_RNDIS_HOST) += rndis_host.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_NET_ZAURUS) += zaurus.o

156
drivers/usb/net/plusb.c Normal file
View File

@ -0,0 +1,156 @@
/*
* PL-2301/2302 USB host-to-host link cables
* Copyright (C) 2000-2005 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/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/workqueue.h>
#include <linux/mii.h>
#include <linux/usb.h>
#include "usbnet.h"
/*
* Prolific PL-2301/PL-2302 driver ... http://www.prolifictech.com
*
* The protocol and handshaking used here should be bug-compatible
* with the Linux 2.2 "plusb" driver, by Deti Fliegl.
*
* HEADS UP: this handshaking isn't all that robust. This driver
* gets confused easily if you unplug one end of the cable then
* try to connect it again; you'll need to restart both ends. The
* "naplink" software (used by some PlayStation/2 deveopers) does
* the handshaking much better! Also, sometimes this hardware
* seems to get wedged under load. Prolific docs are weak, and
* don't identify differences between PL2301 and PL2302, much less
* anything to explain the different PL2302 versions observed.
*/
/*
* Bits 0-4 can be used for software handshaking; they're set from
* one end, cleared from the other, "read" with the interrupt byte.
*/
#define PL_S_EN (1<<7) /* (feature only) suspend enable */
/* reserved bit -- rx ready (6) ? */
#define PL_TX_READY (1<<5) /* (interrupt only) transmit ready */
#define PL_RESET_OUT (1<<4) /* reset output pipe */
#define PL_RESET_IN (1<<3) /* reset input pipe */
#define PL_TX_C (1<<2) /* transmission complete */
#define PL_TX_REQ (1<<1) /* transmission received */
#define PL_PEER_E (1<<0) /* peer exists */
static inline int
pl_vendor_req(struct usbnet *dev, u8 req, u8 val, u8 index)
{
return usb_control_msg(dev->udev,
usb_rcvctrlpipe(dev->udev, 0),
req,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
val, index,
NULL, 0,
USB_CTRL_GET_TIMEOUT);
}
static inline int
pl_clear_QuickLink_features(struct usbnet *dev, int val)
{
return pl_vendor_req(dev, 1, (u8) val, 0);
}
static inline int
pl_set_QuickLink_features(struct usbnet *dev, int val)
{
return pl_vendor_req(dev, 3, (u8) val, 0);
}
static int pl_reset(struct usbnet *dev)
{
/* some units seem to need this reset, others reject it utterly.
* FIXME be more like "naplink" or windows drivers.
*/
(void) pl_set_QuickLink_features(dev,
PL_S_EN|PL_RESET_OUT|PL_RESET_IN|PL_PEER_E);
return 0;
}
static const struct driver_info prolific_info = {
.description = "Prolific PL-2301/PL-2302",
.flags = FLAG_NO_SETINT,
/* some PL-2302 versions seem to fail usb_set_interface() */
.reset = pl_reset,
};
/*-------------------------------------------------------------------------*/
/*
* Proilific's name won't normally be on the cables, and
* may not be on the device.
*/
static const struct usb_device_id products [] = {
{
USB_DEVICE(0x067b, 0x0000), // PL-2301
.driver_info = (unsigned long) &prolific_info,
}, {
USB_DEVICE(0x067b, 0x0001), // PL-2302
.driver_info = (unsigned long) &prolific_info,
},
{ }, // END
};
MODULE_DEVICE_TABLE(usb, products);
static struct usb_driver plusb_driver = {
.owner = THIS_MODULE,
.name = "plusb",
.id_table = products,
.probe = usbnet_probe,
.disconnect = usbnet_disconnect,
.suspend = usbnet_suspend,
.resume = usbnet_resume,
};
static int __init plusb_init(void)
{
return usb_register(&plusb_driver);
}
module_init(plusb_init);
static void __exit plusb_exit(void)
{
usb_deregister(&plusb_driver);
}
module_exit(plusb_exit);
MODULE_AUTHOR("David Brownell");
MODULE_DESCRIPTION("Prolific PL-2301/2302 USB Host to Host Link Driver");
MODULE_LICENSE("GPL");

214
drivers/usb/net/usbnet.c
View File

@ -1,5 +1,5 @@
/* /*
* USB Networking Links * USB Network driver infrastructure
* Copyright (C) 2000-2005 by David Brownell * Copyright (C) 2000-2005 by David Brownell
* Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com> * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
* *
@ -20,96 +20,15 @@
/* /*
* This is a generic "USB networking" framework that works with several * This is a generic "USB networking" framework that works with several
* kinds of full and high speed networking devices: * kinds of full and high speed networking devices: host-to-host cables,
* smart usb peripherals, and actual Ethernet adapters.
* *
* + USB host-to-host "network cables", used for IP-over-USB links. * These devices usually differ in terms of control protocols (if they
* These are often used for Laplink style connectivity products. * even have one!) and sometimes they define new framing to wrap or batch
* - AnchorChip 2720 * Ethernet packets. Otherwise, they talk to USB pretty much the same,
* - Belkin, eTEK (interops with Win32 drivers) * so interface (un)binding, endpoint I/O queues, fault handling, and other
* - GeneSys GL620USB-A * issues can usefully be addressed by this framework.
* - NetChip 1080 (interoperates with NetChip Win32 drivers) */
* - Prolific PL-2301/2302 (replaces "plusb" driver)
* - KC Technology KC2190
*
* + Smart USB devices can support such links directly, using Internet
* standard protocols instead of proprietary host-to-device links.
* - Linux PDAs like iPaq, Yopy, and Zaurus
* - The BLOB boot loader (for diskless booting)
* - Linux "gadgets", perhaps using PXA-2xx or Net2280 controllers
* - Devices using EPSON's sample USB firmware
* - CDC-Ethernet class devices, such as many cable modems
*
* + Adapters to networks such as Ethernet.
* - AX8817X based USB 2.0 products
*
* Links to these devices can be bridged using Linux Ethernet bridging.
* With minor exceptions, these all use similar USB framing for network
* traffic, but need different protocols for control traffic.
*
* USB devices can implement their side of this protocol at the cost
* of two bulk endpoints; it's not restricted to "cable" applications.
* See the SA1110, Zaurus, or EPSON device/client support in this driver;
* slave/target drivers such as "usb-eth" (on most SA-1100 PDAs) or
* "g_ether" (in the Linux "gadget" framework) implement that behavior
* within devices.
*
*
* CHANGELOG:
*
* 13-sep-2000 experimental, new
* 10-oct-2000 usb_device_id table created.
* 28-oct-2000 misc fixes; mostly, discard more TTL-mangled rx packets.
* 01-nov-2000 usb_device_id table and probing api update by
* Adam J. Richter <adam@yggdrasil.com>.
* 18-dec-2000 (db) tx watchdog, "net1080" renaming to "usbnet", device_info
* and prolific support, isolate net1080-specific bits, cleanup.
* fix unlink_urbs oops in D3 PM resume code path.
*
* 02-feb-2001 (db) fix tx skb sharing, packet length, match_flags, ...
* 08-feb-2001 stubbed in "linuxdev", maybe the SA-1100 folk can use it;
* AnchorChips 2720 support (from spec) for testing;
* fix bit-ordering problem with ethernet multicast addr
* 19-feb-2001 Support for clearing halt conditions. SA1100 UDC support
* updates. Oleg Drokin (green@iXcelerator.com)
* 25-mar-2001 More SA-1100 updates, including workaround for ip problem
* expecting cleared skb->cb and framing change to match latest
* handhelds.org version (Oleg). Enable device IDs from the
* Win32 Belkin driver; other cleanups (db).
* 16-jul-2001 Bugfixes for uhci oops-on-unplug, Belkin support, various
* cleanups for problems not yet seen in the field. (db)
* 17-oct-2001 Handle "Advance USBNET" product, like Belkin/eTEK devices,
* from Ioannis Mavroukakis <i.mavroukakis@btinternet.com>;
* rx unlinks somehow weren't async; minor cleanup.
* 03-nov-2001 Merged GeneSys driver; original code from Jiun-Jie Huang
* <huangjj@genesyslogic.com.tw>, updated by Stanislav Brabec
* <utx@penguin.cz>. Made framing options (NetChip/GeneSys)
* tie mostly to (sub)driver info. Workaround some PL-2302
* chips that seem to reject SET_INTERFACE requests.
*
* 06-apr-2002 Added ethtool support, based on a patch from Brad Hards.
* Level of diagnostics is more configurable; they use device
* location (usb_device->devpath) instead of address (2.5).
* For tx_fixup, memflags can't be NOIO.
* 07-may-2002 Generalize/cleanup keventd support, handling rx stalls (mostly
* for USB 2.0 TTs) and memory shortages (potential) too. (db)
* Use "locally assigned" IEEE802 address space. (Brad Hards)
* 18-oct-2002 Support for Zaurus (Pavel Machek), related cleanup (db).
* 14-dec-2002 Remove Zaurus-private crc32 code (Pavel); 2.5 oops fix,
* cleanups and stubbed PXA-250 support (db), fix for framing
* issues on Z, net1080, and gl620a (Toby Milne)
*
* 31-mar-2003 Use endpoint descriptors: high speed support, simpler sa1100
* vs pxa25x, and CDC Ethernet. Throttle down log floods on
* disconnect; other cleanups. (db) Flush net1080 fifos
* after several sequential framing errors. (Johannes Erdfelt)
* 22-aug-2003 AX8817X support (Dave Hollis).
*
* 14-jun-2004 Trivial patch for AX8817X based Buffalo LUA-U2-KTX in Japan
* (Neil Bortnak)
* 03-nov-2004 Trivial patch for KC2190 (KC-190) chip. (Jonathan McDowell)
*
* 01-feb-2005 AX88772 support (Phil Chang & Dave Hollis)
*-------------------------------------------------------------------------*/
// #define DEBUG // error path messages, extra info // #define DEBUG // error path messages, extra info
// #define VERBOSE // more; success messages // #define VERBOSE // more; success messages
@ -301,77 +220,6 @@ void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb)
} }
EXPORT_SYMBOL_GPL(usbnet_skb_return); EXPORT_SYMBOL_GPL(usbnet_skb_return);
#ifdef CONFIG_USB_PL2301
#define HAVE_HARDWARE
/*-------------------------------------------------------------------------
*
* Prolific PL-2301/PL-2302 driver ... http://www.prolifictech.com
*
* The protocol and handshaking used here should be bug-compatible
* with the Linux 2.2 "plusb" driver, by Deti Fliegl.
*
*-------------------------------------------------------------------------*/
/*
* Bits 0-4 can be used for software handshaking; they're set from
* one end, cleared from the other, "read" with the interrupt byte.
*/
#define PL_S_EN (1<<7) /* (feature only) suspend enable */
/* reserved bit -- rx ready (6) ? */
#define PL_TX_READY (1<<5) /* (interrupt only) transmit ready */
#define PL_RESET_OUT (1<<4) /* reset output pipe */
#define PL_RESET_IN (1<<3) /* reset input pipe */
#define PL_TX_C (1<<2) /* transmission complete */
#define PL_TX_REQ (1<<1) /* transmission received */
#define PL_PEER_E (1<<0) /* peer exists */
static inline int
pl_vendor_req (struct usbnet *dev, u8 req, u8 val, u8 index)
{
return usb_control_msg (dev->udev,
usb_rcvctrlpipe (dev->udev, 0),
req,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
val, index,
NULL, 0,
USB_CTRL_GET_TIMEOUT);
}
static inline int
pl_clear_QuickLink_features (struct usbnet *dev, int val)
{
return pl_vendor_req (dev, 1, (u8) val, 0);
}
static inline int
pl_set_QuickLink_features (struct usbnet *dev, int val)
{
return pl_vendor_req (dev, 3, (u8) val, 0);
}
/*-------------------------------------------------------------------------*/
static int pl_reset (struct usbnet *dev)
{
/* some units seem to need this reset, others reject it utterly.
* FIXME be more like "naplink" or windows drivers.
*/
(void) pl_set_QuickLink_features (dev,
PL_S_EN|PL_RESET_OUT|PL_RESET_IN|PL_PEER_E);
return 0;
}
static const struct driver_info prolific_info = {
.description = "Prolific PL-2301/PL-2302",
.flags = FLAG_NO_SETINT,
/* some PL-2302 versions seem to fail usb_set_interface() */
.reset = pl_reset,
};
#endif /* CONFIG_USB_PL2301 */
/*------------------------------------------------------------------------- /*-------------------------------------------------------------------------
* *
@ -1354,62 +1202,24 @@ int usbnet_resume (struct usb_interface *intf)
EXPORT_SYMBOL_GPL(usbnet_resume); EXPORT_SYMBOL_GPL(usbnet_resume);
/*-------------------------------------------------------------------------*/
#ifndef HAVE_HARDWARE
#error You need to configure some hardware for this driver
#endif
/*
* chip vendor names won't normally be on the cables, and
* may not be on the device.
*/
static const struct usb_device_id products [] = {
#ifdef CONFIG_USB_PL2301
{
USB_DEVICE (0x067b, 0x0000), // PL-2301
.driver_info = (unsigned long) &prolific_info,
}, {
USB_DEVICE (0x067b, 0x0001), // PL-2302
.driver_info = (unsigned long) &prolific_info,
},
#endif
{ }, // END
};
MODULE_DEVICE_TABLE (usb, products);
static struct usb_driver usbnet_driver = {
.owner = THIS_MODULE,
.name = driver_name,
.id_table = products,
.probe = usbnet_probe,
.disconnect = usbnet_disconnect,
.suspend = usbnet_suspend,
.resume = usbnet_resume,
};
/*-------------------------------------------------------------------------*/ /*-------------------------------------------------------------------------*/
static int __init usbnet_init(void) static int __init usbnet_init(void)
{ {
// compiler should optimize these out /* compiler should optimize this out */
BUG_ON (sizeof (((struct sk_buff *)0)->cb) BUG_ON (sizeof (((struct sk_buff *)0)->cb)
< sizeof (struct skb_data)); < sizeof (struct skb_data));
random_ether_addr(node_id); random_ether_addr(node_id);
return 0;
return usb_register(&usbnet_driver);
} }
module_init(usbnet_init); module_init(usbnet_init);
static void __exit usbnet_exit(void) static void __exit usbnet_exit(void)
{ {
usb_deregister(&usbnet_driver);
} }
module_exit(usbnet_exit); module_exit(usbnet_exit);
MODULE_AUTHOR("David Brownell"); MODULE_AUTHOR("David Brownell");
MODULE_DESCRIPTION("USB Host-to-Host Link Drivers (numerous vendors)"); MODULE_DESCRIPTION("USB network driver framework");
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");