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-2001-08-11 Tim Waugh <twaugh@redhat.com>
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-
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- * serial.c (get_pci_port): Deal with awkward Titan cards.
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-
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-1998-08-26 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * serial.c (rs_open): Correctly decrement the module in-use count
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- on errors.
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-
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-Thu Feb 19 14:24:08 1998 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * tty_io.c (tty_name): Remove the non-reentrant (and non-SMP safe)
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- version of tty_name, and rename the reentrant _tty_name
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- function to be tty_name.
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- (tty_open): Add a warning message stating callout devices
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- are deprecated.
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-
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-Mon Dec 1 08:24:15 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * tty_io.c (tty_get_baud_rate): Print a warning syslog if the
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- tty->alt_speed kludge is used; this means the system is
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- using the deprecated SPD_HI ioctls.
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-
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-Mon Nov 24 10:37:49 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * serial.c, esp.c, rocket.c: Change drivers to take advantage of
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- tty_get_baud_rate().
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-
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- * tty_io.c (tty_get_baud_rate): New function which computes the
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- correct baud rate for the tty. More factoring out of
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- common code out of the serial driver to the high-level tty
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- functions....
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-
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-Sat Nov 22 07:53:36 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * serial.c, esp.c, rocket.c: Add tty->driver.break() routine, and
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- allow high-level tty code to handle the break and soft
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- carrier ioctls.
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-
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- * tty_ioctl.c (n_tty_ioctl): Support TIOCGSOFTCAR and
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- TIOCSSOFTCAR, so that device drivers don't have to support
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- it.
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-
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- * serial.c (autoconfig): Change 16750 test to hopefully eliminate
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- false results by people with strange 16550As being
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- detected as 16750s. Hopefully 16750s will still be
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- detected as 16750, and other weird UARTs won't get poorly
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- autodetected. If this doesn't work, I'll have to disable
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- the auto identification for the 16750.
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-
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- * tty_io.c (tty_hangup): Now actually do the tty hangup
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- processing during the timer processing, and disable
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- interrupts while doing the hangup processing. This avoids
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- several nasty race conditions which happened when the
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- hangup processing was done asynchronously.
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- (tty_ioctl): Do break handling in the tty driver if
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- driver's break function is supported.
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- (tty_flip_buffer_push): New exported function which should
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- be used by drivers to push characters in the flip buffer
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- to the tty handler. This may either be done using a task
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- queue function for better CPU efficiency, or directly for
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- low latency operation.
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-
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- * serial.c (rs_set_termios): Fix bug rs_set_termios when
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- transitioning away from B0, submitted by Stanislav
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- Voronyi.
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-
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-Thu Jun 19 20:05:58 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * serial.c (begin_break, end_break, rs_ioctl): Applied patch
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- to support BSD ioctls to set and clear the break
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- condition explicitly.
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-
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- * console.c (scrup, scrdown, insert_line, delete_line): Applied
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- fix suggested by Aaron Tiensivu to speed up block scrolls
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- up and down.
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-
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- * n_tty.c (opost_block, write_chan): Added a modified "fast
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- console" patch which processes a block of text via
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- "cooking" efficiently.
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-
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-Wed Jun 18 15:25:50 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * tty_io.c (init_dev, release_dev): Applied fix suggested by Bill
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- Hawes to prevent race conditions in the tty code.
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-
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- * n_tty.c (n_tty_chars_in_buffer): Applied fix suggested by Bill
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- Hawes so that n_tty_chars_in_buffer returns the correct
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- value in the case when the tty is in cannonical mode. (To
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- avoid a pty deadlock with telnetd.)
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-
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-Thu Feb 27 01:53:08 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * serial.c (change_speed): Add support for the termios flag
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- CMSPAR, which allows the user to select stick parity.
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- (i.e, if PARODD is set, the parity bit is always 1; if
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- PARRODD is not set, then the parity bit is always 0).
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-
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-Wed Feb 26 19:03:10 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * serial.c (cleanup_module): Fix memory leak when using the serial
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- driver as a module; make sure tmp_buf gets freed!
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-
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-Tue Feb 25 11:01:59 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * serial.c (set_modem_info): Add support for setting and clearing
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- the OUT1 and OUT2 bits. (For special case UART's, usually
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- for half-duplex.)
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- (autoconfig, change_speed): Fix TI 16750 support.
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-
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-Sun Feb 16 00:14:43 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * tty_io.c (release_dev): Add sanity check to make sure there are
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- no waiters on tty->read_wait or tty->write_wait.
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-
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- * serial.c (rs_init): Don't autoconfig a device if the I/O region
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- is already reserved.
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-
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- * serial.c (serial_proc_info): Add support for /proc/serial.
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-
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-Thu Feb 13 00:49:10 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * serial.c (receive_chars): When the UART repotrs an overrun
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- condition, it does so with a valid character. Changed to
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- not throw away the valid character, but instead report the
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- overrun after the valid character.
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-
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- * serial.c: Added new #ifdef's for some of the advanced serial
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- driver features. A minimal driver that only supports COM
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- 1/2/3/4 without sharing serial interrupts only takes 17k;
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- the full driver takes 32k.
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-
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-Wed Feb 12 14:50:44 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * vt.c:
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- * pty.c:
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- * tty_ioctl.c:
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- * serial.c: Update routines to use the new 2.1 memory access
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- routines.
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-
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-Wed Dec 4 07:51:52 1996 Theodore Ts'o <tytso@localhost.mit.edu>
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-
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- * serial.c (change_speed): Use save_flags(); cli() and
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- restore_flags() in order to ensure we don't accidentally
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- turn on interrupts when starting up the port.
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- (startup): Move the insertion of serial structure into the
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- IRQ chain earlier into the startup processing. Interrupts
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- should be off this whole time, but we eventually will want
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- to reduce this window.
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-
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-Thu Nov 21 10:05:22 1996 Theodore Ts'o <tytso@localhost.mit.edu>
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-
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- * tty_ioctl.c (tty_wait_until_sent): Always check the driver
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- wait_until_ready routine, even if there are no characters
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- in the xmit buffer. (There may be charactes in the device
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- FIFO.)
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- (n_tty_ioctl): Add new flag tty->flow_stopped which
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- indicates whether the tty is stopped due to a request by
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- the TCXONC ioctl (used by tcflow). If so, don't let an
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- incoming XOFF character restart the tty. The tty can only
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- be restarted by another TCXONC request.
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-
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- * tty_io.c (start_tty): Don't allow the tty to be restarted if
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- tty->flow_stopped is true.
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-
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- * n_tty.c (n_tty_receive_char): If tty->flow_stopped is true, and
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- IXANY is set, don't eat a character trying to restart the
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- tty.
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-
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- * serial.c (startup): Remove need for MCR_noint from the
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- async_struct structure. Only turn on DTR and RTS if the
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- baud rate is not zero.
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- (change_speed): More accurately calculate the timeout
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- value based on the word size. Move responsibility of
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- hangup when speed becomes B0 to rs_set_termios()
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- (set_serial_info): When changing the UART type set the
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- current xmit_fifo_size as well as the permanent
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- xmit_fifo_size.
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- (rs_ioctl): Fix TCSBRK (used by tcdrain) and TCSBRKP
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- ioctls to return EINTR if interrupted by a signal.
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- (rs_set_termios): If the baud rate changes to or from B0,
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- this function is now responsible for setting or clearing
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- DTR and RTS. DTR and RTS are only be changed on the
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- transition to or from the B0 state.
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- (rs_close): Wait for the characters to drain based on
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- info->timeout. At low baud rates (50 bps), it may take a
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- long time for the FIFO to completely drain out!
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- (rs_wait_until_sent): Fixed timeout handling. Now
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- releases control to the scheduler, but checks frequently
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- enough so that the function is sensitive enough to pass
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- the timing requirements of the NIST-PCTS.
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- (block_til_ready): When opening the device, don't turn on
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- DTR and RTS if the baud rate is B0.
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-
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-Thu Nov 14 00:06:09 1996 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * serial.c (autoconfig): Fix autoconfiguration problems;
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- info->flags wasn't getting initialized from the state
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- structure. Put in more paranoid test for the 16750.
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-
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-Fri Nov 8 20:19:50 1996 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * n_tty.c (n_tty_flush_buffer): Only call driver->unthrottle() if
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- the tty was previous throttled.
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- (n_tty_set_termios, write_chan): Add changes suggested by
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- Simon P. Allen to allow hardware cooking.
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-
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- * tty_ioctl.c (set_termios): If we get a signal while waiting for
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- the tty to drain, return -EINTR.
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-
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- * serial.c (change_speed): Add support for CREAD, as required by
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- POSIX.
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-
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-Sat Nov 2 20:43:10 1996 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * serial.c: Wholesale changes. Added support for the Startech
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- 16650 and 16650V2 chips. (WARNING: the new startech
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- 16650A may or may not work!) Added support for the
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- TI16750 (not yet tested). Split async_struct into a
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- transient part (async_struct) and a permanent part
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- (serial_state) which contains the configuration
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- information for the ports. Added new driver routines
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- wait_until_sent() and send_xchar() to help with POSIX
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- compliance. Added support for radio clocks which waggle
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- the carrier detect line (CONFIG_HARD_PPS).
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-
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- * tty_ioctl.c (tty_wait_until_sent): Added call to new driver
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- function tty->driver.wait_until_sent(), which returns when
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- the tty's device xmit buffers are drained. Needed for
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- full POSIX compliance.
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-
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- (send_prio_char): New function, called by the ioctl's
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- TCIOFF and TCION; uses the new driver call send_xchar(),
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- which will send the XON or XOFF character at high priority
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- (and even if tty output is stopped).
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-
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-Wed Jun 5 18:52:04 1996 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * pty.c (pty_close): When closing a pty, make sure packet mode is
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- cleared.
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-
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-Sun May 26 09:33:52 1996 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * vesa_blank.c (set_vesa_blanking): Add missing verify_area() call.
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-
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- * selection.c (set_selection): Add missing verify_area() call.
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-
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- * tty_io.c (tty_ioctl): Add missing verify_area() calls.
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-
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- * serial.c (rs_ioctl): Add missing verify_area() calls.
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- (rs_init): Allow initialization of serial driver
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- configuration from a module.
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-
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- * random.c (extract_entropy): Add missing verify_area call.
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- Don't limit number of characters returned to
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- 32,768. Extract entropy is now no longer a inlined
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- function.
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-
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- (random_read): Check return value in case extract_entropy
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- returns an error.
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-
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- (secure_tcp_sequence_number): New function which returns a
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- secure TCP sequence number. This is needed to prevent some
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- nasty TCP hijacking attacks.
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-
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- (init_std_data): Initialize using gettimeofday() instead of
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- struct timeval xtime.
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-
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- (fast_add_entropy_word, add_entropy_word): Rename the
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- inline function add_entropy_word() to
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- fast_add_entropy_word(). Make add_entropy_word() be the
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- non-inlined function which is used in non-timing critical
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- places, in order to save space.
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-
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- (initialize_benchmark, begin_benchmark, end_benchmark): New
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- functions defined when RANDOM_BENCHMARK is defined. They
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- allow us to benchmark the speed of the
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- add_timer_randomness() call.
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-
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- (int_ln, rotate_left): Add two new inline functions with
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- i386 optimized asm instructions. This speeds up the
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- critical add_entropy_word() and add_timer_randomness()
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- functions, which are called from interrupt handlers.
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-
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-Tue May 7 22:51:11 1996 <tytso@rsts-11.mit.edu>
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-
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- * random.c (add_timer_randomness): Limit the amount randomness
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- that we estimate to 12 bits. (An arbitrary amount).
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-
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- (extract_entropy): To make it harder to analyze the hash
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- function, fold the hash function in half using XOR, and
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- use the folded result as the value to emit to the user.
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- Also, add timer randomness each pass through the
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- exact_entropy call, to increase the amount of unknown
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- values during the extraction process.
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-
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- (random_ioctl): Use IOR/IOW definitions to define the
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- ioctl values used by the /dev/random driver. Allow the
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- old ioctl values to be used for backwards compatibility
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- (for a limited amount of time).
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-
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-Wed Apr 24 14:02:04 1996 Theodore Ts'o <tytso@rsts-11.mit.edu>
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-
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- * random.c (add_timer_randomness): Use 2nd derivative as well to
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- better estimate entropy.
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-
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- (rand_initialize): Explicitly initialize all the pointers
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- to NULL. (Clearing pointers using memset isn't portable.)
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- Initialize the random pool with OS-dependent data.
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-
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- (random_write): Add sanity checking to the arguments to
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- random_write(), so that bad arguments won't cause a kernel
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- SEGV.
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-
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- (random_read): Update the access time of the device inode
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- when you return data to the user.
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-
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- (random_ioctl): Wake up the random_wait channel when there
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- are only WAIT_INPUT_BITS available. Add more paranoia
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- checks to make sure entropy_count doesn't go beyond the
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- bounds of (0, POOLSIZE). Add a few missing verify_area
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- checks. Add support for the RNDCLEARPOOL ioctl, which
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- zaps the random pool.
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-
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- (add_timer_randomness): Wake up the random_wait
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- channel only when there are WAIT_INPUT_BITS available.
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-
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- (random_select): Allow a random refresh daemon process to
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- select on /dev/random for writing; wake up the daemon when
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- there are less than WAIT_OUTPUT_BITS bits of randomness
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- available.
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-
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-Tue Apr 23 22:56:07 1996 <tytso@rsts-11.mit.edu>
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-
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- * tty_io.c (init_dev): Change return code when user attempts to
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- open master pty which is already open from EAGAIN to EIO,
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- to match with BSD expectations. EIO is more correct
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- anyway, since EAGAIN implies that retrying will be
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- successful --- which it might be.... Eventually!!
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-
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- * pty.c (pty_open, pty_close): Fix wait loop so that we don't
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- busy loop while waiting for the master side to open.
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- Fix tty opening/closing logic. TTY_SLAVE_CLOSED was
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- renamed to TTY_OTHER_CLOSED, so that the name is more
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- descriptive. Also fixed code so that the tty flag
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- actually works correctly now....
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-
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-Mon Apr 1 10:22:01 1996 <tytso@rsts-11.mit.edu>
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-
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- * serial.c (rs_close): Cleaned up modularization changes.
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- Remove code which forced line discipline back to N_TTY
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- this is done in the tty upper layers, and there's no
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- reason to do it here. (Making this change also
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- removed the requirement that the serial module access
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- the internal kernel symbol "ldiscs".)
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-
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- * tty_io.c (tty_init): Formally register a tty_driver entry for
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- /dev/tty (device 4, 0) and /dev/console (device 5, 0).
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- This guarantees that major device numbers 4 and 5 will be
|
|
|
- reserved for the tty subsystem (as they have to be because
|
|
|
- of /dev/tty and /dev/console). Removed tty_regdev, as
|
|
|
- this interface is no longer necessary.
|
|
|
-
|
|
|
-Sun Mar 17 20:42:47 GMT 1996 <ah@doc.ic.ac.uk>
|
|
|
-
|
|
|
- * serial.c : modularisation (changes in linux/fs/device.c allow
|
|
|
- kerneld to automatically load the serial module).
|
|
|
-
|
|
|
- * Makefile, Config.in : serial modularisation adds.
|
|
|
-
|
|
|
- * tty_io.c : tty_init_ctty used by to register "cua" driver just
|
|
|
- for the /dev/tty device (5,0). Added tty_regdev.
|
|
|
-
|
|
|
- * serial.c (shutdown, rs_ioctl) : when port shuts down wakeup processes
|
|
|
- waiting on delta_msr_wait. The TIOCMIWAIT ioctl returns EIO
|
|
|
- if no change was done since the time of call.
|
|
|
-
|
|
|
-Sat Mar 16 14:33:13 1996 <aeb@cwi.nl>
|
|
|
-
|
|
|
- * tty_io.c (disassociate_ctty): If disassociate_ctty is called by
|
|
|
- exit, do not perform an implicit vhangup on a pty.
|
|
|
-
|
|
|
-Fri Feb 9 14:15:47 1996 <tytso@rsts-11.mit.edu>
|
|
|
-
|
|
|
- * serial.c (block_til_ready): Fixed another race condition which
|
|
|
- happens if a hangup happens during the open.
|
|
|
-
|
|
|
-Wed Jan 10 10:08:00 1996 <tytso@rsts-11.mit.edu>
|
|
|
-
|
|
|
- * serial.c (block_til_ready): Remove race condition which happened
|
|
|
- if a hangup condition happened during the setup of the
|
|
|
- UART, before rs_open() called block_til_ready(). This
|
|
|
- caused the info->count counter to be erroneously
|
|
|
- decremented.
|
|
|
-
|
|
|
- * serial.c (startup, rs_open): Remove race condition that could
|
|
|
- cause a memory leak of one page. (Fortunately, both race
|
|
|
- conditions were relatively rare in practice.)
|
|
|
-
|
|
|
-Tue Dec 5 13:21:27 1995 <tytso@rsts-11.mit.edu>
|
|
|
-
|
|
|
- * serial.c (check_modem_status, rs_ioctl): Support the new
|
|
|
- ioctl()'s TIOCGICOUNT, TIOCMIWAIT. These allow an
|
|
|
- application program to wait on a modem serial register
|
|
|
- status bit change, and to find out how many changes have
|
|
|
- taken place for the MSR bits.
|
|
|
-
|
|
|
- (rs_write): Eliminate a race condition which is introduced
|
|
|
- if it is necessary to wait for the semaphore.
|
|
|
-
|
|
|
-Sat Nov 4 17:14:45 1995 <tytso@rsts-11.mit.edu>
|
|
|
-
|
|
|
- * tty_io.c (tty_init): Move registration of TTY_MAJOR and
|
|
|
- TTY_AUX_MAJOR to the end, so that /proc/devices looks
|
|
|
- prettier.
|
|
|
-
|
|
|
- * pty.c (pty_init): Use new major numbers for PTY master and slave
|
|
|
- devices. This allow us to have more than 64 pty's. We
|
|
|
- register the old pty devices for backwards compatibility.
|
|
|
- Note that a system should either be using the old pty
|
|
|
- devices or the new pty devices --- in general, it should
|
|
|
- try to use both, since they map into the same pty table.
|
|
|
- The old pty devices are strictly for backwards compatibility.
|
|
|
-
|
|
|
-Wed Oct 11 12:45:24 1995 <tytso@rsts-11.mit.edu>
|
|
|
-
|
|
|
- * tty_io.c (disassociate_ctty): If disassociate_ctty is called by
|
|
|
- exit, perform an implicit vhangup on the tty.
|
|
|
-
|
|
|
- * pty.c (pty_close): When the master pty is closed, send a hangup
|
|
|
- to the slave pty.
|
|
|
- (pty_open): Use the flag TTY_SLAVE_CLOSED to test to see
|
|
|
- if there are any open slave ptys, instead of using
|
|
|
- tty->link->count. The old method got confused if there
|
|
|
- were processes that had hung-up file descriptors on the
|
|
|
- slave tty.
|
|
|
-
|
|
|
-Tue May 2 00:53:25 1995 <tytso@rsx-11.mit.edu>
|
|
|
-
|
|
|
- * tty_io.c (tty_set_ldisc): Wait until the output buffer is
|
|
|
- drained before closing the old line discipline --- needed
|
|
|
- in only one case: XON/XOFF processing.
|
|
|
-
|
|
|
- * n_tty.c (n_tty_close): Don't bother waiting until the output
|
|
|
- driver is closed; in general, the line discipline
|
|
|
- shouldn't care if the hardware is finished
|
|
|
- transmitting before the line discipline terminates.
|
|
|
-
|
|
|
- * tty_io.c (release_dev): Shutdown the line discipline after
|
|
|
- decrementing the tty count variable; but set the
|
|
|
- TTY_CLOSING flag so that we know that this tty structure
|
|
|
- isn't long for this world.
|
|
|
-
|
|
|
- * tty_io.c (init_dev): Add sanity code to check to see if
|
|
|
- TTY_CLOSING is set on a tty structure; if so, something
|
|
|
- bad has happened (probably a line discipline close blocked
|
|
|
- when it shouldn't have; so do a kernel printk and then
|
|
|
- return an error).
|
|
|
-
|
|
|
-Wed Apr 26 10:23:44 1995 Theodore Y. Ts'o <tytso@localhost>
|
|
|
-
|
|
|
- * tty_io.c (release_dev): Try to shutdown the line discipline
|
|
|
- *before* decrementing the tty count variable; this removes
|
|
|
- a potential race condition which occurs when the line
|
|
|
- discipline close blocks, and another process then tries
|
|
|
- open the same serial port.
|
|
|
-
|
|
|
- * serial.c (rs_hangup): When hanging up, flush the output buffer
|
|
|
- before shutting down the UART. Otherwise the line
|
|
|
- discipline close blocks waiting for the characters to get
|
|
|
- flushed, which never happens until the serial port gets reused.
|
|
|
-
|
|
|
-Wed Apr 12 08:06:16 1995 Theodore Y. Ts'o <tytso@localhost>
|
|
|
-
|
|
|
- * serial.c (do_serial_hangup, do_softint, check_modem_status,
|
|
|
- rs_init): Hangups are now scheduled via a separate tqueue
|
|
|
- structure in the async_struct structure, tqueue_hangup.
|
|
|
- This task is pushed on to the tq_schedule queue, so that
|
|
|
- it is processed synchronously by the scheduler.
|
|
|
-
|
|
|
-Sat Feb 18 12:13:51 1995 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * tty_io.c (disassociate_ctty, tty_open, tty_ioctl): Clear
|
|
|
- current->tty_old_pgrp field when a session leader
|
|
|
- acquires a controlling tty, and after a session leader
|
|
|
- has disassociated from a controlling tty.
|
|
|
-
|
|
|
-Fri Feb 17 09:34:09 1995 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * serial.c (rs_interrupt_single, rs_interrupt, rs_interrupt_multi):
|
|
|
- Change the number of passes made from 64 to be 256,
|
|
|
- configurable with the #define RS_ISR_PASS_LIMIT.
|
|
|
-
|
|
|
- * serial.c (rs_init, set_serial_info, get_serial_info, rs_close):
|
|
|
- Remove support for closing_wait2. Instead, set
|
|
|
- tty->closing and rely on the line discipline to prevent
|
|
|
- echo wars.
|
|
|
-
|
|
|
- * n_tty.c (n_tty_receive_char): IEXTEN does not need to be
|
|
|
- enabled in order for IXANY to be active.
|
|
|
-
|
|
|
- If tty->closing is set, then only process XON and XOFF
|
|
|
- characters.
|
|
|
-
|
|
|
-Sun Feb 12 23:57:48 1995 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * serial.c (rs_timer): Change the interrupt poll time from 60
|
|
|
- seconds to 10 seconds, configurable with the #define
|
|
|
- RS_STROBE_TIME.
|
|
|
-
|
|
|
- * serial.c (rs_interrupt_multi, startup, shutdown, rs_ioctl,
|
|
|
- set_multiport_struct, get_multiport_struct): Add
|
|
|
- provisions for a new type of interrupt service routine,
|
|
|
- which better supports multiple serial ports on a single
|
|
|
- IRQ.
|
|
|
-
|
|
|
-Sun Feb 5 19:35:11 1995 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * tty_ioctl.c (n_tty_ioctl, set_termios, tty_wait_until_sent):
|
|
|
- * serial.c (rs_ioctl, rs_close):
|
|
|
- * cyclades.c (cy_ioctl, cy_close):
|
|
|
- * n_tty.c (n_tty_close): Rename wait_until_sent to
|
|
|
- tty_wait_until_sent, so that it's a better name to export
|
|
|
- in ksyms.c.
|
|
|
-
|
|
|
-Sat Feb 4 23:36:20 1995 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * serial.c (rs_close): Added missing check for closing_wait2 being
|
|
|
- ASYNC_CLOSING_WAIT_NONE.
|
|
|
-
|
|
|
-Thu Jan 26 09:02:49 1995 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * serial.c (rs_init, set_serial_info, get_serial_info,
|
|
|
- rs_close): Support close_wait in the serial driver.
|
|
|
- This is helpful for slow devices (like serial
|
|
|
- plotters) so that their outputs don't get flushed upon
|
|
|
- device close. This has to be configurable because
|
|
|
- normally we don't want ports to be hung up for long
|
|
|
- periods of time during a close when they are not
|
|
|
- connected to a device, or the device is powered off.
|
|
|
-
|
|
|
- The default is to wait 30 seconds; in the case of a
|
|
|
- very slow device, the close_wait timeout should be
|
|
|
- lengthened. If it is set to 0, the kernel will wait
|
|
|
- forever for all of the data to be transmitted.
|
|
|
-
|
|
|
-Thu Jan 17 01:17:20 1995 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * serial.c (startup, change_speed, rs_init): Add support to detect
|
|
|
- the StarTech 16650 chip. Treat it as a 16450 for now,
|
|
|
- because of its FIFO bugs.
|
|
|
-
|
|
|
-Thu Jan 5 21:21:57 1995 <dahinds@users.sourceforge.net>
|
|
|
-
|
|
|
- * serial.c: (receive_char): Added counter to prevent infinite loop
|
|
|
- when a PCMCIA serial device is ejected.
|
|
|
-
|
|
|
-Thu Dec 29 17:53:48 1994 <tytso@rsx-11.mit.edu>
|
|
|
-
|
|
|
- * tty_io.c (check_tty_count): New procedure which checks
|
|
|
- tty->count to make sure that it matches with the number of
|
|
|
- open file descriptors which point at the structure. If
|
|
|
- the number doesn't match, it prints a warning message.
|
|
|
-
|
|
|
-Wed Dec 28 15:41:51 1994 <tytso@rsx-11.mit.edu>
|
|
|
-
|
|
|
- * tty_io.c (do_tty_hangup, disassociate_ctty): At hangup time,
|
|
|
- save the tty's current foreground process group in the
|
|
|
- session leader's task structure. When the session leader
|
|
|
- terminates, send a SIGHUP, SIGCONT to that process group.
|
|
|
- This is not required by POSIX, but it's not prohibited
|
|
|
- either, and it appears to be the least intrusive way
|
|
|
- to fix a problem that dialup servers have with
|
|
|
- orphaned process groups caused by modem hangups.
|
|
|
-
|
|
|
-Thu Dec 8 14:52:11 1994 <tytso@rsx-11.mit.edu>
|
|
|
-
|
|
|
- * serial.c (rs_ioctl): Don't allow most ioctl's if the serial port
|
|
|
- isn't initialized.
|
|
|
-
|
|
|
- * serial.c (rs_close): Don't clear the IER if the serial port
|
|
|
- isn't initialized.
|
|
|
-
|
|
|
- * serial.c (block_til_ready): Don't try to block on the dialin
|
|
|
- port if the serial port isn't initialized.
|
|
|
-
|
|
|
-Wed Dec 7 10:48:30 1994 Si Park (si@wimpol.demon.co.uk)
|
|
|
- * tty_io.c (tty_register_driver): Fix bug when linking onto
|
|
|
- the tty_drivers list. We now test that there are elements
|
|
|
- already on the list before setting the back link from the
|
|
|
- first element to the new driver.
|
|
|
-
|
|
|
- * tty_io.c (tty_unregister_driver): Fix bug in unlinking the
|
|
|
- specified driver from the tty_drivers list. We were not
|
|
|
- setting the back link correctly. This used to result in
|
|
|
- a dangling back link pointer and cause panics on the next
|
|
|
- call to get_tty_driver().
|
|
|
-
|
|
|
-Tue Nov 29 10:21:09 1994 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * tty_io.c (tty_unregister_driver): Fix bug in
|
|
|
- tty_unregister_driver where the pointer to the refcount is
|
|
|
- tested, instead of the refcount itself. This caused
|
|
|
- tty_unregister_driver to always return EBUSY.
|
|
|
-
|
|
|
-Sat Nov 26 11:59:24 1994 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * tty_io.c (tty_ioctl): Add support for the new ioctl
|
|
|
- TIOCTTYGSTRUCT, which allow a kernel debugging program
|
|
|
- direct read access to the tty and tty_driver structures.
|
|
|
-
|
|
|
-Fri Nov 25 17:26:22 1994 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * serial.c (rs_set_termios): Don't wake up processes blocked in
|
|
|
- open when the CLOCAL flag changes, since a blocking
|
|
|
- open only samples the CLOCAL flag once when it blocks,
|
|
|
- and doesn't check it again. (n.b. FreeBSD has a
|
|
|
- different behavior for blocking opens; it's not clear
|
|
|
- whether Linux or FreeBSD's interpretation is correct.
|
|
|
- POSIX doesn't give clear guidance on this issue, so
|
|
|
- this may change in the future....)
|
|
|
-
|
|
|
- * serial.c (block_til_ready): Use the correct termios structure to
|
|
|
- check the CLOCAL flag. If the cuaXX device is active,
|
|
|
- then check the saved termios for the ttySXX device.
|
|
|
- Otherwise, use the currently active termios structure.
|
|
|
-
|
|
|
-Sun Nov 6 21:05:44 1994 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * serial.c (change_speed): Add support for direct access of
|
|
|
- 57,600 and 115,200 bps.
|
|
|
-
|
|
|
-Wed Nov 2 10:32:36 1994 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * n_tty.c (n_tty_receive_room): Only allow excess characters
|
|
|
- through if we are in ICANON mode *and* there are other no
|
|
|
- pending lines in the buffer. Otherwise cut and paste over
|
|
|
- 4k breaks.
|
|
|
-
|
|
|
-Sat Oct 29 18:17:34 1994 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * serial.c (rs_ioctl, get_lsr_info): Added patch suggested by Arne
|
|
|
- Riiber so that user mode programs can tell when the
|
|
|
- transmitter shift register is empty.
|
|
|
-
|
|
|
-Thu Oct 27 23:14:29 1994 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * tty_ioctl.c (wait_until_sent): Added debugging printk statements
|
|
|
- (under the #ifdef TTY_DEBUG_WAIT_UNTIL_SENT)
|
|
|
-
|
|
|
- * serial.c (rs_interrupt, rs_interrupt_single, receive_chars,
|
|
|
- change_speed, rs_close): rs_close now disables receiver
|
|
|
- interrupts when closing the serial port. This allows the
|
|
|
- serial port to close quickly when Linux and a modem (or a
|
|
|
- mouse) are engaged in an echo war; when closing the serial
|
|
|
- port, we now first stop listening to incoming characters,
|
|
|
- and *then* wait for the transmit buffer to drain.
|
|
|
-
|
|
|
- In order to make this change, the info->read_status_mask
|
|
|
- is now used to control what bits of the line status
|
|
|
- register are looked at in the interrupt routine in all
|
|
|
- cases; previously it was only used in receive_chars to
|
|
|
- select a few of the status bits.
|
|
|
-
|
|
|
-Mon Oct 24 23:36:21 1994 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * serial.c (rs_close): Add a timeout to the transmitter flush
|
|
|
- loop; this is just a sanity check in case we have flaky
|
|
|
- (or non-existent-but-configured-by-the-user) hardware.
|
|
|
-
|
|
|
-Fri Oct 21 09:37:23 1994 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * tty_io.c (tty_fasync): When asynchronous I/O is enabled, if the
|
|
|
- process or process group has not be specified yet, set it
|
|
|
- to be the tty's process group, or if that is not yet set,
|
|
|
- to the current process's pid.
|
|
|
-
|
|
|
-Thu Oct 20 23:17:28 1994 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * n_tty.c (n_tty_receive_room): If we are doing input
|
|
|
- canonicalization, let as many characters through as
|
|
|
- possible, so that the excess characters can be "beeped".
|
|
|
-
|
|
|
-Tue Oct 18 10:02:43 1994 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * serial.c (rs_start): Removed an incorrect '!' that was
|
|
|
- preventing transmit interrupts from being re-enabled in
|
|
|
- rs_start(). Fortunately in most cases it would be
|
|
|
- re-enabled elsewhere, but this still should be fixed
|
|
|
- correctly.
|
|
|
-
|
|
|
-Sun Oct 9 23:46:03 1994 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * tty_io.c (do_tty_hangup): If the tty driver flags
|
|
|
- TTY_DRIVER_RESET_TERMIOS is set, then reset the termios
|
|
|
- settings back to the driver's initial configuration. This
|
|
|
- allows the termios settings to be reset even if a process
|
|
|
- has hung up file descriptors keeping a pty's termios from
|
|
|
- being freed and reset.
|
|
|
-
|
|
|
- * tty_io.c (release_dev): Fix memory leak. The pty's other
|
|
|
- termios structure should also be freed.
|
|
|
-
|
|
|
- * serial.c (rs_close, shutdown): Change how we wait for the
|
|
|
- transmitter to completely drain before shutting down the
|
|
|
- serial port. We now do it by scheduling in another
|
|
|
- process instead of busy looping with the interrupts turned
|
|
|
- on. This may eliminate some race condition problems that
|
|
|
- some people seem to be reporting.
|
|
|
-
|
|
|
-Sun Sep 25 14:18:14 1994 Theodore Y. Ts'o (tytso@rt-11)
|
|
|
-
|
|
|
- * tty_io.c (release_dev): When freeing a tty make sure that both
|
|
|
- the tty and the o_tty (if present) aren't a process's
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- controlling tty. (Previously, we only checked the tty.)
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-
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- * serial.c (change_speed): Only enable the Modem Status
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- Interrupt for a port if CLOCAL is not set or CRTSCTS
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- is set. If we're not checking the carrier detect and
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- CTS line, there's no point in enabling the modem
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- status interrupt. This will save spurious interrupts
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- from slowing down systems who have terminals that
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- don't support either line. (Of course, if you want
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- only one of CD and CTS support, you will need a
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- properly wired serial cable.)
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-
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-Thu Sep 22 08:32:48 1994 Theodore Y. Ts'o (tytso@rt-11)
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-
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- * tty_io.c (do_SAK): Return if tty is null.
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-
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- * tty_io.c (_tty_name): Return "NULL tty" if the passed in tty is
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- NULL.
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-
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-Sat Sep 17 13:19:25 1994 Theodore Y. Ts'o (tytso@rt-11)
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-
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- * tty_ioctl.c (n_tty_ioctl): Fix TIOCGLCKTRMIOS and
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- TIOCSLCKTRMIOS, which were totally broken. Remove
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- extra indirection from argument; it should be a struct
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- termios *, not a struct termios **.
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- &real_tty->termios_locked should have been
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- real_tty->termios_locked. This caused us to be
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- reading and writing the termios_locked structure to
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- random places in kernel memory.
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-
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- * tty_io.c (release_dev): Oops! Forgot to delete a critical kfree
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- of the locked_termios. This leaves the locked_termios
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- structure pointed at a freed object.
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-
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-Fri Sep 16 08:13:25 1994 Theodore Y. Ts'o (tytso@rt-11)
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-
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- * tty_io.c (tty_open): Don't check for an exclusive open until
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- after the device specific open routine has been called.
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- Otherwise, the serial device ref counting will be screwed
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- up.
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-
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- * serial.c (rs_open, block_til_ready): Don't set termios structure
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- until after block_til_ready has returned successfully.
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- Modify block_til_ready to check the normal_termios
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- structure directly, so it doesn't rely on termios being
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- set before it's called.
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-
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-Thu Sep 15 23:34:01 1994 Theodore Y. Ts'o (tytso@rt-11)
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-
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- * serial.c (rs_close): Turn off interrupts during rs_close() to
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- prevent a race condition with the hangup code (which
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- runs during a software interrupt).
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-
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- * tty_io.c (release_dev): Don't free the locked_termios structure;
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- its state must be retained across device opens.
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-
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-
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- * tty_io.c (tty_unregister_driver): Added function to unregister a
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- tty driver. (For loadable device drivers.)
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-
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-
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Linus Torvalds