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Commit b69578df authored by Mike Dunn's avatar Mike Dunn Committed by Greg Kroah-Hartman
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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: default avatarMike Dunn <mikedunn@newsguy.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent c220cc3e

Documentation/usb/usb-serial.txt

+16 −0
Original line number Diff line number Diff line
@@ -440,6 +440,22 @@ Winchiphead CH341 Driver 
  For any questions or problems with this driver, please contact

  frank@kingswood-consulting.co.uk.



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).



  TODO:

    - 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

drivers/usb/serial/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -425,6 +425,17 @@ config USB_SERIAL_MOS7720 
	  To compile this driver as a module, choose M here: the

	  module will be called mos7720.



if USB_SERIAL_MOS7720

config USB_SERIAL_MOS7715_PARPORT

	bool "Support for parallel port on the Moschip 7715"

	select PARPORT_NOT_PC

	depends on PARPORT

	---help---

	Say Y if you have a Moschip 7715 device and would like to use

	the parallel port it provides.  The port will register with

	the parport subsystem as a low-level driver.

endif



config USB_SERIAL_MOS7840

	tristate "USB Moschip 7840/7820 USB Serial Driver"

	---help---

drivers/usb/serial/mos7720.c

+720 −86

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