mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
161 lines
4.6 KiB
161 lines
4.6 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* PL-2301/2302 USB host-to-host link cables |
|
* Copyright (C) 2000-2005 by David Brownell |
|
*/ |
|
|
|
// #define DEBUG // error path messages, extra info |
|
// #define VERBOSE // more; success messages |
|
|
|
#include <linux/module.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 <linux/usb/usbnet.h> |
|
|
|
|
|
/* |
|
* Prolific PL-2301/PL-2302 driver ... http://www.prolific.com.tw/ |
|
* |
|
* 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 developers) 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. |
|
* |
|
* NOTE: pl2501 has several modes, including pl2301 and pl2302 |
|
* compatibility. Some docs suggest the difference between 2301 |
|
* and 2302 is only to make MS-Windows use a different driver... |
|
* |
|
* pl25a1 glue based on patch from Tony Gibbs. Prolific "docs" on |
|
* this chip are as usual incomplete about what control messages |
|
* are supported. |
|
*/ |
|
|
|
/* |
|
* 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 usbnet_read_cmd(dev, req, |
|
USB_DIR_IN | USB_TYPE_VENDOR | |
|
USB_RECIP_DEVICE, |
|
val, index, NULL, 0); |
|
} |
|
|
|
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) |
|
{ |
|
int status; |
|
|
|
/* some units seem to need this reset, others reject it utterly. |
|
* FIXME be more like "naplink" or windows drivers. |
|
*/ |
|
status = pl_set_QuickLink_features(dev, |
|
PL_S_EN|PL_RESET_OUT|PL_RESET_IN|PL_PEER_E); |
|
if (status != 0 && netif_msg_probe(dev)) |
|
netif_dbg(dev, link, dev->net, "pl_reset --> %d\n", status); |
|
return 0; |
|
} |
|
|
|
static const struct driver_info prolific_info = { |
|
.description = "Prolific PL-2301/PL-2302/PL-25A1/PL-27A1", |
|
.flags = FLAG_POINTTOPOINT | 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 [] = { |
|
|
|
/* full speed cables */ |
|
{ |
|
USB_DEVICE(0x067b, 0x0000), // PL-2301 |
|
.driver_info = (unsigned long) &prolific_info, |
|
}, { |
|
USB_DEVICE(0x067b, 0x0001), // PL-2302 |
|
.driver_info = (unsigned long) &prolific_info, |
|
}, |
|
|
|
/* high speed cables */ |
|
{ |
|
USB_DEVICE(0x067b, 0x25a1), /* PL-25A1, no eeprom */ |
|
.driver_info = (unsigned long) &prolific_info, |
|
}, { |
|
USB_DEVICE(0x050d, 0x258a), /* Belkin F5U258/F5U279 (PL-25A1) */ |
|
.driver_info = (unsigned long) &prolific_info, |
|
}, { |
|
USB_DEVICE(0x3923, 0x7825), /* National Instruments USB |
|
* Host-to-Host Cable |
|
*/ |
|
.driver_info = (unsigned long) &prolific_info, |
|
|
|
}, |
|
|
|
/* super speed cables */ |
|
{ |
|
USB_DEVICE(0x067b, 0x27a1), /* PL-27A1, no eeprom |
|
* also: goobay Active USB 3.0 |
|
* Data Link, |
|
* Unitek Y-3501 |
|
*/ |
|
.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, |
|
.disable_hub_initiated_lpm = 1, |
|
}; |
|
|
|
module_usb_driver(plusb_driver); |
|
|
|
MODULE_AUTHOR("David Brownell"); |
|
MODULE_DESCRIPTION("Prolific PL-2301/2302/25A1/27A1 USB Host to Host Link Driver"); |
|
MODULE_LICENSE("GPL");
|
|
|