- 02 Jan, 2009 40 commits
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Alan Cox authored
Use the tty port operations, add refcounting, and refactor a bit to make the refcounting work cleanly. Signed-off-by:
Alan Cox <alan@redhat.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Alan Cox authored
Now we have our ducks in order we can begin switching to the port operations Signed-off-by:
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Alan Cox authored
We will need this kref fitted to make full use of the port operations. Signed-off-by:
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Alan Cox authored
We need to this ready for using the standard helpers Signed-off-by:
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Alan Cox authored
Bring this driver into the port locking model Signed-off-by:
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Alan Cox authored
Now the locking is straight and the port kref usage is straight we can replace lots of chunks of code with the standard port helpers Signed-off-by:
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Alan Cox authored
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Alan Cox authored
Bring epca into line with the port locking. Signed-off-by:
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Denis Joseph Barrow authored
Makes TIOCM ioctls for Data Carrier Detect & related functions work like /drivers/serial/serial-core.c potentially needed for pppd & similar user programs. Signed-off-by:
Denis Joseph Barrow <D.Barow@option.com> Signed-off-by:
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Alan Cox authored
Init the tty structure once Don't set ->low_latency twice in a row Don't force bits we should be leaving to the user Don't allocate termios arrays as these are in fact allocated by the tty layer for you and just overwrite the ones allocated in the driver Signed-off-by:
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Alan Cox authored
Checking tty == NULL doesn't help us unless we have a clear semantic for the locking of the tty object in the driver. Use the tty kref objects so that we can take references to the tty in the USB event handling paths. Signed-off-by:
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Alan Cox authored
Update the nozomi driver to use krefs Signed-off-by: -
Alan Cox authored
disc_data and driver_data are void * Signed-off-by:
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Alan Cox authored
The write wakeup is done anyway for the poll while DO_WRITE_WAKUP is cleared, set and managed by the ldisc layer and is no business of the pty code. Signed-off-by:
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Thomas Pfaff authored
The N_TTY ldisc layer does not send SIGIO POLL_OUTs correctly when output is possible due to flawed handling of the TTY_DO_WRITE_WAKEUP bit. It will either send no SIGIOs at all or on every tty wakeup. The fix is to set the bit when the tty driver write would block and test and clear it on write wakeup. [Merged with existing N_TTY patches and a small buglet fixed -- Alan] Signed-off-by:
Thomas Pfaff <tpfaff@pcs.com> Signed-off-by:
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Alan Cox authored
The underlying problem is that the device methods don't all correctly handle disconnected status and some keep reporting bytes pending which causes tcdrain to stall. When the cable is unplugged they are definitely gone, and as this is true for all USB cables we can fix it in the core usb serial code. Signed-off-by:
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Niels de Vos authored
The PCI-card identified as "Oxford Semiconductor Ltd EXSYS EX-41092 Dual 16950 Serial adapter" is only usable with other devices (i.e. not the same card) after doing a "setserial /dev/ttyS<n> baud_base 115200". This baud_base should be default for this card. Signed-off-by:
Niels de Vos <niels.devos@wincor-nixdorf.com> Signed-off-by:
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Alan Cox authored
Again this is a lot of common code we can unify Signed-off-by:
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Alan Cox authored
If we have no speed set at some point then we should not raise DTR/RTS at that point when opening as the tty is not ready Signed-off-by:
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Alan Cox authored
Mark it broken Signed-off-by:
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Alan Cox authored
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Alan Cox authored
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Alan Cox authored
Start sucking more commonality out of the drivers into a single piece of core code. Signed-off-by:
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Alan Cox authored
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Alan Cox authored
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Alan Cox authored
Normalise them so we can use the common helpers later on Signed-off-by:
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Alan Cox authored
Switch generic_serial to do port count locking via the tty_port structure ready for moving to a common port wait routine. Keep the old driver lock for internal calling so we don't risk messing up the drivers below until we are ready. Still needs kref conversions Signed-off-by:
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Alan Cox authored
This helps set the basis for moving block_til_ready into common code. We also introduce a tty_port_hangup helper as this will also be generally needed. Signed-off-by:
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Alan Cox authored
This moves another per device special out of what should be shared open wait paths into private methods Signed-off-by:
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Alan Cox authored
This was an alloc/clear wrapper but makes even less sense now it uses kzalloc. Kill it off. Signed-off-by:
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Alan Cox authored
This is the first step to generalising the various pieces of waiting logic duplicated in all sorts of serial drivers. Signed-off-by:
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Alan Cox authored
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David Howells authored
Wrap access to task credentials so that they can be separated more easily from the task_struct during the introduction of COW creds. Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id(). Change some task->e?[ug]id to task_e?[ug]id(). In some places it makes more sense to use RCU directly rather than a convenient wrapper; these will be addressed by later patches. Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
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Kevin Hao authored
Add device funtion for usb serial console, so we can open /dev/console when we use a usb serial device as console. (Typecast removed as noted by Sergei Shtylyov) Signed-off-by:
Kevin Hao <kexin.hao@windriver.com> Signed-off-by:
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Russell King authored
this happening again by making use of 'const'. Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by:
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Russell King authored
scribble on its own reference structures. Signed-off-by:
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Andrew Morton authored
fs/devpts/inode.c:324: warning: 'compare_init_pts_sb' defined but not used Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Alan Cox authored
USB serial has always had races where the tty port usage count can hit zero during a receive event. The internal locking is a mutex so we can't use that in the IRQ handlers. With krefs we can tackle this differently but we still need to be careful. Signed-off-by:
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Joe Peterson authored
This patch causes "bell" (^G) characters (invoked when the input buffer is full) to be immediately output rather than filling the echo buffer. This is especially a problem when the tty is stopped and buffers fill, since the bells do not serve their purpose of immediate notification that the buffer cannot take further input, and they will flush all at once when the tty is restarted. Signed-off-by:
Joe Peterson <joe@skyrush.com> Signed-off-by:
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Joe Peterson authored
Fix the handling of input characters when the tty buffer is full or nearly full. This includes tests that are done in n_tty_receive_char() and handling of PARMRK. Problems with the buffer-full tests done in receive_char() caused characters to be lost at times when the buffer(s) filled. Also, these full conditions would often only be detected with echo on, and PARMRK was not accounted for properly in all cases. One symptom of these problems, in addition to lost characters, was early termination from unix commands like tr and cat when ^Q was used to break from a stopped tty with full buffers (note that breaking out was often previously not possible, due to the pty getting in "gridlock", which will be addressed in another patch). Note space is always reserved at the end of the buffer for a newline (or EOF/EOL) in canonical mode. Signed-off-by:
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