090ffa9d0e
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>
157 lines
4.4 KiB
C
157 lines
4.4 KiB
C
/*
|
|
* 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");
|