path: root/Documentation/usb
diff options
authorMike Dunn <mikedunn@newsguy.com>2010-04-15 17:01:33 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2010-05-20 13:21:39 -0700
commitb69578df7e98659b7d94c905971a6d1025b431ad (patch)
treef4cbfff73b9eb064a95a7101d239a83219b4e6d0 /Documentation/usb
parentc220cc3e37f1596260870f99f751102f667384a5 (diff)
USB: usbserial: mos7720: add support for parallel port on moschip 7715
Add support for the parallel port on the moschip MCS7715 device. The port registers itself with the parport subsystem as a low-level driver. A separate entry to the kernel configuration is added beneath that for the mos7720, to avoid the need to link with the parport subsystem code for users who don't have or don't want the parallel port. Only compatibility mode is currently supported (no ECP/EPP). Tested with both moschip devices (7720 and 7715) on UP and SMP hosts, including regression testing of serial port, concurrent operation of serial and parallel ports, and various connect / disconnect scenarios. Signed-off-by: Mike Dunn <mikedunn@newsguy.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation/usb')
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/usb/usb-serial.txt b/Documentation/usb/usb-serial.txt
index 540c91ccf86f..f4d214510259 100644
--- a/Documentation/usb/usb-serial.txt
+++ b/Documentation/usb/usb-serial.txt
@@ -440,6 +440,22 @@ Winchiphead CH341 Driver
For any questions or problems with this driver, please contact
+Moschip MCS7720, MCS7715 driver
+ These chips are present in devices sold by various manufacturers, such as Syba
+ and Cables Unlimited. There may be others. The 7720 provides two serial
+ ports, and the 7715 provides one serial and one standard PC parallel port.
+ Support for the 7715's parallel port is enabled by a separate option, which
+ will not appear unless parallel port support is first enabled at the top-level
+ of the Device Drivers config menu. Currently only compatibility mode is
+ supported on the parallel port (no ECP/EPP).
+ - Implement ECP/EPP modes for the parallel port.
+ - Baud rates higher than 115200 are currently broken.
+ - Devices with a single serial port based on the Moschip MCS7703 may work
+ with this driver with a simple addition to the usb_device_id table. I
+ don't have one of these devices, so I can't say for sure.
Generic Serial driver