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Subject[PATCH] pl25a1_support
Date
Adds support for 'Windows Easy Transfer' cables based around the
Prolific PL-25A1 chip (includes Belkin F5U258 & F5U279)

Patch originally suggested by David Brownell here:
http://www.mail-archive.com/netdev@vger.kernel.org/msg61926.html

Modified to work with latest kernel, tested with F5U279.

Signed-off-by: Simon Wood <simon@mungewell.org>
---
drivers/net/usb/Kconfig | 2 +-
drivers/net/usb/plusb.c | 33 ++++++++++++++++++++++++++-------
2 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/drivers/net/usb/Kconfig b/drivers/net/usb/Kconfig
index 6f600cc..85fec06 100644
--- a/drivers/net/usb/Kconfig
+++ b/drivers/net/usb/Kconfig
@@ -258,7 +258,7 @@ config USB_NET_NET1080
optionally with LEDs that indicate traffic

config USB_NET_PLUSB
- tristate "Prolific PL-2301/2302 based cables"
+ tristate "Prolific PL-2301/2302/25A1 based cables"
# if the handshake/init/reset problems, from original 'plusb',
# are ever resolved ... then remove "experimental"
depends on USB_USBNET && EXPERIMENTAL
diff --git a/drivers/net/usb/plusb.c b/drivers/net/usb/plusb.c
index 08ad269..a20afac 100644
--- a/drivers/net/usb/plusb.c
+++ b/drivers/net/usb/plusb.c
@@ -45,6 +45,14 @@
* 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.
*/

/*
@@ -89,13 +97,17 @@ 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,
+ int status;
+
+ 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",
+ .description = "Prolific PL-2301/PL-2302/PL-25A1",
.flags = FLAG_NO_SETINT,
/* some PL-2302 versions seem to fail usb_set_interface() */
.reset = pl_reset,
@@ -110,7 +122,7 @@ static const struct driver_info prolific_info = {
*/

static const struct usb_device_id products [] = {
-
+/* full speed cables */
{
USB_DEVICE(0x067b, 0x0000), // PL-2301
.driver_info = (unsigned long) &prolific_info,
@@ -118,7 +130,14 @@ static const struct usb_device_id products [] = {
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,
+},
{ }, // END
};
MODULE_DEVICE_TABLE(usb, products);
@@ -134,16 +153,16 @@ static struct usb_driver plusb_driver = {

static int __init plusb_init(void)
{
- return usb_register(&plusb_driver);
+ return usb_register(&plusb_driver);
}
module_init(plusb_init);

static void __exit plusb_exit(void)
{
- usb_deregister(&plusb_driver);
+ 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_DESCRIPTION("Prolific PL-2301/2302/25A1 USB Host to Host Link Driver");
MODULE_LICENSE("GPL");
--
1.7.0.4


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