From 5b2fc499917e5897a13add780e181b4cef197072 Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Wed, 9 May 2007 21:31:55 -0400 Subject: Move USB network drivers to drivers/net/usb. It is preferable to group drivers by usage (net, scsi, ATA, ...) than by bus. When reviewing drivers, the [PCI|USB|PCMCIA|...] maintainer is probably less qualified on networking issues than a networking maintainer. Also, from a practical standpoint, chips often appear on multiple buses, which is why we do not put drivers into drivers/pci/net. Signed-off-by: Greg Kroah-Hartman Signed-off-by: Jeff Garzik --- drivers/net/usb/plusb.c | 150 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 150 insertions(+) create mode 100644 drivers/net/usb/plusb.c (limited to 'drivers/net/usb/plusb.c') diff --git a/drivers/net/usb/plusb.c b/drivers/net/usb/plusb.c new file mode 100644 index 000000000000..45300939d185 --- /dev/null +++ b/drivers/net/usb/plusb.c @@ -0,0 +1,150 @@ +/* + * 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 +#include +#include +#include +#include +#include +#include +#include + +#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 = { + .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"); -- cgit v1.2.3