linux-toradex.git/include/linux/usb/serial.h, branch v2.6.31.2

tty: USB serial termios bits

2009-10-05T16:32:37+00:00

commit fe1ae7fdd2ee603f2d95f04e09a68f7f79045127 upstream.

Various drivers have hacks to mangle termios structures. This stems from
the fact there is no nice setup hook for configuring the termios settings
when the port is created

Signed-off-by: Alan Cox 
Signed-off-by: Greg Kroah-Hartman

tty: Fix USB kref leak

2009-07-11T02:17:22+00:00

The sysrq code acquired a kref leak. Fix it by passing the tty separately
from the caller (thus effectively using the callers kref which all the
callers hold anyway)

Signed-off-by: Alan Cox 
Signed-off-by: Linus Torvalds

USB: usb-serial: replace shutdown with disconnect, release

2009-06-16T04:44:47+00:00

This patch (as1254) splits up the shutdown method of usb_serial_driver
into a disconnect and a release method.

The problem is that the usb-serial core was calling shutdown during
disconnect handling, but drivers didn't expect it to be called until
after all the open file references had been closed.  The result was an
oops when the close method tried to use memory that had been
deallocated by shutdown.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: usb-serial: call port_probe and port_remove at the right times

2009-06-16T04:44:47+00:00

This patch (as1253) prevents the usb-serial core from calling a
driver's port_probe and port_remove methods more than once per port.
It also removes some unnecessary try_module_get() calls and adds a
missing port_remove method call in a failure path.

Signed-off-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman

USB: serial: usb_debug,usb_generic_serial: implement sysrq and serial break

2009-06-16T04:44:45+00:00

The usb_debug driver was modified to implement serial break handling
by using a "magic" data packet comprised of the sequence:

       0x00 0xff 0x01 0xfe   0x00 0xfe 0x01 0xff

When the tty layer requests a serial break the usb_debug driver sends
the magic packet.  On the receiving side the magic packet is thrown
away or a sysrq is activated depending on what kernel .config options
have been set.

The generic serial driver was modified as well as the usb serial
headers to generically implement sysrq processing in the same way the
non usb uart based drivers implement the sysrq handling.  This will
allow other usb serial devices to implement sysrq handling as desired.

The new usb serial functions are named similarly and implemented
similarly to the uart functions as follows:

usb_serial_handle_break <-> uart_handle_break
usb_serial_handle_sysrq_char <-> uart_handle_sysrq_char

Signed-off-by: Jason Wessel 
Signed-off-by: Greg Kroah-Hartman

USB: usb_debug, usb_generic_serial: implement multi urb write

2009-06-16T04:44:45+00:00

The usb_debug driver, when used as the console, will always fail to
insert the carriage return and new line sequence as well as randomly
drop console output.  This is a result of only having the single
write_urb and that the tty layer will have a lock that prevents the
processing of the back to back urb requests.

The solution is to allow more than one urb to be outstanding and have
a slightly deeper transmit queue.  The idea and some code is borrowed
from the ftdi_sio usb driver.

The generic usb serial driver was modified so as to allow the classic
method of 1 write urb, or a multi write urb scheme with N allowed
outstanding urbs where N is controlled by max_in_flight_urbs.  When
max_in_flight_urbs in a "struct usb_serial_driver" is non zero the
multi write urb scheme will be used.

The size of 4000 was selected for the usb_debug driver so that the
driver lowers possibility of losing the queued console messages during
the kernel startup.

Signed-off-by: Jason Wessel 
Signed-off-by: Greg Kroah-Hartman

tty: Bring the usb tty port structure into more use

2009-06-11T15:50:56+00:00

This allows us to clean stuff up, but is probably also going to cause
some app breakage with buggy apps as we now implement proper POSIX behaviour
for USB ports matching all the other ports. This does also mean other apps
that break on USB will now work properly.

Signed-off-by: Alan Cox 
Signed-off-by: Linus Torvalds

tty: Update some of the USB kernel doc

2009-04-14T15:48:57+00:00

Updates some usb_serial_port members documentation.

Signed-off-by: Leandro Dorileo 
Signed-off-by: Alan Cox 
Signed-off-by: Linus Torvalds

USB: serial: introduce a flag into the usb serial layer to tell drivers that their URBs are killed due to suspension

2009-03-24T23:20:29+00:00

This patch introduces a flag into the usb serial layer to tell drivers
that their URBs are killed due to suspension. That is necessary to let
drivers know whether they should report an error back.

Signed-off-by: Oliver Neukum 

Hi Greg,

this is for 2.6.30. Patches to use this in drivers are under development.

	Regards
		Oliver

USB: Fix spelling in usb/serial.h

2008-10-17T21:40:56+00:00

Fixes a minor typo in the comments for usb_set_serial_data.

Signed-off-by: Geoff Levand 
Signed-off-by: Greg Kroah-Hartman