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Commit 14b54e39 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
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USB: serial: remove changelogs and old todo entries 



Remove remaining changelogs from file headers (can still be retrieved
through git).
Remove even older changelog entries stored in Changelog.history.
Remove outdated todo entries from belkin_sa.

Signed-off-by: default avatarJohan Hovold <jhovold@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 5c85477f

drivers/usb/serial/ChangeLog.history

deleted100644 → 0
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File deleted.

Preview size limit exceeded, changes collapsed.

drivers/usb/serial/belkin_sa.c

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 * TODO:

 * -- Add true modem contol line query capability.  Currently we track the

 *    states reported by the interrupt and the states we request.

 * -- Add error reporting back to application for UART error conditions.

 *    Just point me at how to implement this and I'll do it. I've put the

 *    framework in, but haven't analyzed the "tty_flip" interface yet.

 * -- Add support for flush commands

 * -- Add everything that is missing :)

 *

 * 27-Nov-2001 gkh

 * 	compressed all the differnent device entries into 1.

 *

 * 30-May-2001 gkh

 *	switched from using spinlock to a semaphore, which fixes lots of

 *	problems.

 *

 * 08-Apr-2001 gb

 *	- Identify version on module load.

 *

 * 12-Mar-2001 gkh

 *	- Added support for the GoHubs GO-COM232 device which is the same as the

 *	  Peracom device.

 *

 * 06-Nov-2000 gkh

 *	- Added support for the old Belkin and Peracom devices.

 *	- Made the port able to be opened multiple times.

 *	- Added some defaults incase the line settings are things these devices

 *	  can't support.

 *

 * 18-Oct-2000 William Greathouse

 *    Released into the wild (linux-usb-devel)

 *

 * 17-Oct-2000 William Greathouse

 *    Add code to recognize firmware version and set hardware flow control

 *    appropriately.  Belkin states that firmware prior to 3.05 does not

 *    operate correctly in hardware handshake mode.  I have verified this

 *    on firmware 2.05 -- for both RTS and DTR input flow control, the control

 *    line is not reset.  The test performed by the Belkin Win* driver is

 *    to enable hardware flow control for firmware 2.06 or greater and

 *    for 1.00 or prior.  I am only enabling for 2.06 or greater.

 *

 * 12-Oct-2000 William Greathouse

 *    First cut at supporting Belkin USB Serial Adapter F5U103

 *    I did not have a copy of the original work to support this

 *    adapter, so pardon any stupid mistakes.  All of the information

 *    I am using to write this driver was acquired by using a modified

 *    UsbSnoop on Windows2000 and from examining the other USB drivers.

 */



#include <linux/kernel.h>

drivers/usb/serial/cypress_m8.c

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@@ -16,32 +16,6 @@ 
 *

 * See http://geocities.com/i0xox0i for information on this driver and the

 * earthmate usb device.

 *

 *  Lonnie Mendez <dignome@gmail.com>

 *  4-29-2005

 *	Fixed problem where setting or retreiving the serial config would fail

 *	with EPIPE.  Removed CRTS toggling so the driver behaves more like

 *	other usbserial adapters.  Issued new interval of 1ms instead of the

 *	default 10ms.  As a result, transfer speed has been substantially

 *	increased from avg. 850bps to avg. 3300bps.  initial termios has also

 *	been modified.  Cleaned up code and formatting issues so it is more

 *	readable.  Replaced the C++ style comments.

 *

 *  Lonnie Mendez <dignome@gmail.com>

 *  12-15-2004

 *	Incorporated write buffering from pl2303 driver.  Fixed bug with line

 *	handling so both lines are raised in cypress_open. (was dropping rts)

 *      Various code cleanups made as well along with other misc bug fixes.

 *

 *  Lonnie Mendez <dignome@gmail.com>

 *  04-10-2004

 *	Driver modified to support dynamic line settings.  Various improvements

 *      and features.

 *

 *  Neil Whelchel

 *  10-2003

 *	Driver first released.

 *

 */



/* Thanks to Neil Whelchel for writing the first cypress m8 implementation

drivers/usb/serial/digi_acceleport.c

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@@ -13,222 +13,6 @@ 
*

*  Peter Berger (pberger@brimson.com)

*  Al Borchers (borchers@steinerpoint.com)

* 

* (12/03/2001) gkh

*	switched to using port->port.count instead of private version.

*	Removed port->active

*

* (04/08/2001) gb

*	Identify version on module load.

*

* (11/01/2000) Adam J. Richter

*	usb_device_id table support

* 

* (11/01/2000) pberger and borchers

*    -- Turned off the USB_DISABLE_SPD flag for write bulk urbs--it caused

*       USB 4 ports to hang on startup.

*    -- Serialized access to write urbs by adding the dp_write_urb_in_use

*       flag; otherwise, the driver caused SMP system hangs.  Watching the

*       urb status is not sufficient.

*

* (10/05/2000) gkh

*    -- Fixed bug with urb->dev not being set properly, now that the usb

*	core needs it.

* 

*  (8/8/2000) pberger and borchers

*    -- Fixed close so that 

*       - it can timeout while waiting for transmit idle, if needed;

*       - it ignores interrupts when flushing the port, turning

*         of modem signalling, and so on;

*       - it waits for the flush to really complete before returning.

*    -- Read_bulk_callback and write_bulk_callback check for a closed

*       port before using the tty struct or writing to the port.

*    -- The two changes above fix the oops caused by interrupted closes.

*    -- Added interruptible args to write_oob_command and set_modem_signals

*       and added a timeout arg to transmit_idle; needed for fixes to

*       close.

*    -- Added code for rx_throttle and rx_unthrottle so that input flow

*       control works.

*    -- Added code to set overrun, parity, framing, and break errors

*       (untested).

*    -- Set USB_DISABLE_SPD flag for write bulk urbs, so no 0 length

*       bulk writes are done.  These hung the Digi USB device.  The

*       0 length bulk writes were a new feature of usb-uhci added in

*       the 2.4.0-test6 kernels.

*    -- Fixed mod inc race in open; do mod inc before sleeping to wait

*       for a close to finish.

*

*  (7/31/2000) pberger

*    -- Fixed bugs with hardware handshaking:

*       - Added code to set/clear tty->hw_stopped in digi_read_oob_callback()

*         and digi_set_termios()

*    -- Added code in digi_set_termios() to

*       - add conditional in code handling transition from B0 to only

*         set RTS if RTS/CTS flow control is either not in use or if

*         the port is not currently throttled.

*       - handle turning off CRTSCTS.

*

*  (7/30/2000) borchers

*    -- Added support for more than one Digi USB device by moving

*       globals to a private structure in the pointed to from the

*       usb_serial structure.

*    -- Moved the modem change and transmit idle wait queues into

*       the port private structure, so each port has its own queue

*       rather than sharing global queues.

*    -- Added support for break signals.

*

*  (7/25/2000) pberger

*    -- Added USB-2 support.  Note: the USB-2 supports 3 devices: two

*       serial and a parallel port.  The parallel port is implemented

*       as a serial-to-parallel converter.  That is, the driver actually

*       presents all three USB-2 interfaces as serial ports, but the third

*       one physically connects to a parallel device.  Thus, for example,

*       one could plug a parallel printer into the USB-2's third port,

*       but from the kernel's (and userland's) point of view what's

*       actually out there is a serial device.

*

*  (7/15/2000) borchers

*    -- Fixed race in open when a close is in progress.

*    -- Keep count of opens and dec the module use count for each

*       outstanding open when shutdown is called (on disconnect).

*    -- Fixed sanity checks in read_bulk_callback and write_bulk_callback

*       so pointers are checked before use.

*    -- Split read bulk callback into in band and out of band

*       callbacks, and no longer restart read chains if there is

*       a status error or a sanity error.  This fixed the seg

*       faults and other errors we used to get on disconnect.

*    -- Port->active is once again a flag as usb-serial intended it

*       to be, not a count.  Since it was only a char it would

*       have been limited to 256 simultaneous opens.  Now the open

*       count is kept in the port private structure in dp_open_count.

*    -- Added code for modularization of the digi_acceleport driver.

*

*  (6/27/2000) pberger and borchers

*    -- Zeroed out sync field in the wakeup_task before first use;

*       otherwise the uninitialized value might prevent the task from

*       being scheduled.

*    -- Initialized ret value to 0 in write_bulk_callback, otherwise

*       the uninitialized value could cause a spurious debugging message.

*

*  (6/22/2000) pberger and borchers

*    -- Made cond_wait_... inline--apparently on SPARC the flags arg

*       to spin_lock_irqsave cannot be passed to another function

*       to call spin_unlock_irqrestore.  Thanks to Pauline Middelink.

*    -- In digi_set_modem_signals the inner nested spin locks use just

*       spin_lock() rather than spin_lock_irqsave().  The old code

*       mistakenly left interrupts off.  Thanks to Pauline Middelink.

*    -- copy_from_user (which can sleep) is no longer called while a

*       spinlock is held.  We copy to a local buffer before getting

*       the spinlock--don't like the extra copy but the code is simpler.

*    -- Printk and dbg are no longer called while a spin lock is held.

*

*  (6/4/2000) pberger and borchers

*    -- Replaced separate calls to spin_unlock_irqrestore and

*       interruptible_sleep_on_timeout with a new function

*       cond_wait_interruptible_timeout_irqrestore.  This eliminates

*       the race condition where the wake up could happen after

*       the unlock and before the sleep.

*    -- Close now waits for output to drain.

*    -- Open waits until any close in progress is finished.

*    -- All out of band responses are now processed, not just the

*       first in a USB packet.

*    -- Fixed a bug that prevented the driver from working when the

*       first Digi port was not the first USB serial port--the driver

*       was mistakenly using the external USB serial port number to

*       try to index into its internal ports.

*    -- Fixed an SMP bug -- write_bulk_callback is called directly from

*       an interrupt, so spin_lock_irqsave/spin_unlock_irqrestore are

*       needed for locks outside write_bulk_callback that are also

*       acquired by write_bulk_callback to prevent deadlocks.

*    -- Fixed support for select() by making digi_chars_in_buffer()

*       return 256 when -EINPROGRESS is set, as the line discipline

*       code in n_tty.c expects.

*    -- Fixed an include file ordering problem that prevented debugging

*       messages from working.

*    -- Fixed an intermittent timeout problem that caused writes to

*       sometimes get stuck on some machines on some kernels.  It turns

*       out in these circumstances write_chan() (in n_tty.c) was

*       asleep waiting for our wakeup call.  Even though we call

*       wake_up_interruptible() in digi_write_bulk_callback(), there is

*       a race condition that could cause the wakeup to fail: if our

*       wake_up_interruptible() call occurs between the time that our

*       driver write routine finishes and write_chan() sets current->state

*       to TASK_INTERRUPTIBLE, the effect of our wakeup setting the state

*       to TASK_RUNNING will be lost and write_chan's subsequent call to

*       schedule() will never return (unless it catches a signal).

*       This race condition occurs because write_bulk_callback() (and thus

*       the wakeup) are called asynchronously from an interrupt, rather than

*       from the scheduler.  We can avoid the race by calling the wakeup

*       from the scheduler queue and that's our fix:  Now, at the end of

*       write_bulk_callback() we queue up a wakeup call on the scheduler

*       task queue.  We still also invoke the wakeup directly since that

*       squeezes a bit more performance out of the driver, and any lost

*       race conditions will get cleaned up at the next scheduler run.

*

*       NOTE:  The problem also goes away if you comment out

*       the two code lines in write_chan() where current->state

*       is set to TASK_RUNNING just before calling driver.write() and to

*       TASK_INTERRUPTIBLE immediately afterwards.  This is why the

*       problem did not show up with the 2.2 kernels -- they do not

*       include that code.

*

*  (5/16/2000) pberger and borchers

*    -- Added timeouts to sleeps, to defend against lost wake ups.

*    -- Handle transition to/from B0 baud rate in digi_set_termios.

*

*  (5/13/2000) pberger and borchers

*    -- All commands now sent on out of band port, using

*       digi_write_oob_command.

*    -- Get modem control signals whenever they change, support TIOCMGET/

*       SET/BIS/BIC ioctls.

*    -- digi_set_termios now supports parity, word size, stop bits, and

*       receive enable.

*    -- Cleaned up open and close, use digi_set_termios and

*       digi_write_oob_command to set port parameters.

*    -- Added digi_startup_device to start read chains on all ports.

*    -- Write buffer is only used when count==1, to be sure put_char can

*       write a char (unless the buffer is full).

*

*  (5/10/2000) pberger and borchers

*    -- Added MOD_INC_USE_COUNT/MOD_DEC_USE_COUNT calls on open/close.

*    -- Fixed problem where the first incoming character is lost on

*       port opens after the first close on that port.  Now we keep

*       the read_urb chain open until shutdown.

*    -- Added more port conditioning calls in digi_open and digi_close.

*    -- Convert port->active to a use count so that we can deal with multiple

*       opens and closes properly.

*    -- Fixed some problems with the locking code.

*

*  (5/3/2000) pberger and borchers

*    -- First alpha version of the driver--many known limitations and bugs.

*

*

*  Locking and SMP

*

*  - Each port, including the out-of-band port, has a lock used to

*    serialize all access to the port's private structure.

*  - The port lock is also used to serialize all writes and access to

*    the port's URB.

*  - The port lock is also used for the port write_wait condition

*    variable.  Holding the port lock will prevent a wake up on the

*    port's write_wait; this can be used with cond_wait_... to be sure

*    the wake up is not lost in a race when dropping the lock and

*    sleeping waiting for the wakeup.

*  - digi_write() does not sleep, since it is sometimes called on

*    interrupt time.

*  - digi_write_bulk_callback() and digi_read_bulk_callback() are

*    called directly from interrupts.  Hence spin_lock_irqsave()

*    and spin_unlock_irqrestore() are used in the rest of the code

*    for any locks they acquire.

*  - digi_write_bulk_callback() gets the port lock before waking up

*    processes sleeping on the port write_wait.  It also schedules

*    wake ups so they happen from the scheduler, because the tty

*    system can miss wake ups from interrupts.

*  - All sleeps use a timeout of DIGI_RETRY_TIMEOUT before looping to

*    recheck the condition they are sleeping on.  This is defensive,

*    in case a wake up is lost.

*  - Following Documentation/DocBook/kernel-locking.tmpl no spin locks

*    are held when calling copy_to/from_user or printk.

*/



#include <linux/kernel.h>

drivers/usb/serial/io_ti.c

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 * For questions or problems with this driver, contact Inside Out

 * Networks technical support, or Peter Berger <pberger@brimson.com>,

 * or Al Borchers <alborchers@steinerpoint.com>.

 *

 * Version history:

 *

 *	July 11, 2002 	Removed 4 port device structure since all TI UMP

 *			chips have only 2 ports

 *			David Iacovelli (davidi@ionetworks.com)

 *

 */



#include <linux/kernel.h>