Eric Lee / smarc-fsl-linux-kernel

20 Oct, 2008

1 commit

  • 8433ac61a   serial_txx9: use %lx for iobase ... Browse Code »

    Fix a warning caused by commit 0c8946d97ae7d2d6691f8290a10faa63453b63f8
    (serial: Make uart_port's ioport "unsigned long".)

    Signed-off-by: Atsushi Nemoto
    Cc: Alan Cox
    Cc: Josip Rodin
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Atsushi Nemoto
     

23 Jul, 2008

1 commit

30 Oct, 2007

1 commit

  • 23f42b7b2   serial: fix serial_txx9 console initialization ... Browse Code »

    Since commit 97d97224ff361e08777fb33e0fd193ca877dac28 ("[SERIAL] Fix
    console initialisation ordering"), serial_core calls ->pm() on
    initialization even if the port was used for console.

    This behaviour breaks serial_txx9 console since The serial_txx9 driver
    initialize its port entirely on its ->pm() method if new state was 0.
    This patch adds checking for oldstate value to fix this probelm.

    Signed-off-by: Atsushi Nemoto
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Atsushi Nemoto
     

17 Oct, 2007

2 commits

23 Aug, 2007

1 commit

01 Aug, 2007

1 commit

  • ddb437b7f   serial_txx9: fix printk format mismatch ... Browse Code »

    Since the commit 4f640efb3170dbcf99a37a3cc99060647b95428c, "%lx" is not
    suitable for p->mapbase (resource_size_t) in 32-bit. This patch fixes a
    compiler warning caused by the mismatch.

    Signed-off-by: Atsushi Nemoto
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Atsushi Nemoto
     

09 May, 2007

2 commits

  • a4bb27d99   serial_txx9: zap changelog from source code ... Browse Code »

    Signed-off-by: Atsushi Nemoto
    Cc: Ralf Baechle
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Atsushi Nemoto
     
  • 07bafde35   serial_txx9: Use assigned device numbers ... Browse Code »

    The serial_txx9 driver have abused device numbers (major 4, minor 128) if
    CONFIG_SERIAL_TXX9_STDSERIAL was not set. This patch makes the driver use
    proper device numbers assigned for it (major 204, minor 196-203). I
    suppose a typical user of this driver set CONFIG_SERIAL_TXX9_STDSERIAL to Y
    (i.e. use "ttyS0"), so this patch would not cause big compatibility issue.

    Signed-off-by: Atsushi Nemoto
    Cc: Ralf Baechle
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Atsushi Nemoto
     

22 Feb, 2007

1 commit

12 Feb, 2007

1 commit

  • 138c5d258   [PATCH] serial: serial_txx9 driver update ... Browse Code »

    Update the serial_txx9 driver.

    * Configurable manumum port number. (SERIAL_TXX9_NR_UARTS)
    * Remove some code which is unneeded if CONFIG_PM=n.
    * Use PCI_DEVICE() for pci device id table and make it const.
    * Do not include

    Signed-off-by: Atsushi Nemoto
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Atsushi Nemoto
     

09 Dec, 2006

1 commit

  • 606d099cd   [PATCH] tty: switch to ktermios ... Browse Code »

    This is the grungy swap all the occurrences in the right places patch that
    goes with the updates. At this point we have the same functionality as
    before (except that sgttyb() returns speeds not zero) and are ready to
    begin turning new stuff on providing nobody reports lots of bugs

    If you are a tty driver author converting an out of tree driver the only
    impact should be termios->ktermios name changes for the speed/property
    setting functions from your upper layers.

    If you are implementing your own TCGETS function before then your driver
    was broken already and its about to get a whole lot more painful for you so
    please fix it 8)

    Also fill in c_ispeed/ospeed on init for most devices, although the current
    code will do this for you anyway but I'd like eventually to lose that extra
    paranoia

    [akpm@osdl.org: bluetooth fix]
    [mp3@de.ibm.com: sclp fix]
    [mp3@de.ibm.com: warning fix for tty3270]
    [hugh@veritas.com: fix tty_ioctl powerpc build]
    [jdike@addtoit.com: uml: fix ->set_termios declaration]
    Signed-off-by: Alan Cox
    Signed-off-by: Martin Peschke
    Acked-by: Peter Oberparleiter
    Cc: Cornelia Huck
    Signed-off-by: Hugh Dickins
    Signed-off-by: Jeff Dike
    Cc: Paolo 'Blaisorblade' Giarrusso
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Alan Cox
     

05 Oct, 2006

1 commit

  • 7d12e780e   IRQ: Maintain regs pointer globally rather than passing to IRQ handlers ... Browse Code »

    Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
    of passing regs around manually through all ~1800 interrupt handlers in the
    Linux kernel.

    The regs pointer is used in few places, but it potentially costs both stack
    space and code to pass it around. On the FRV arch, removing the regs parameter
    from all the genirq function results in a 20% speed up of the IRQ exit path
    (ie: from leaving timer_interrupt() to leaving do_IRQ()).

    Where appropriate, an arch may override the generic storage facility and do
    something different with the variable. On FRV, for instance, the address is
    maintained in GR28 at all times inside the kernel as part of general exception
    handling.

    Having looked over the code, it appears that the parameter may be handed down
    through up to twenty or so layers of functions. Consider a USB character
    device attached to a USB hub, attached to a USB controller that posts its
    interrupts through a cascaded auxiliary interrupt controller. A character
    device driver may want to pass regs to the sysrq handler through the input
    layer which adds another few layers of parameter passing.

    I've build this code with allyesconfig for x86_64 and i386. I've runtested the
    main part of the code on FRV and i386, though I can't test most of the drivers.
    I've also done partial conversion for powerpc and MIPS - these at least compile
    with minimal configurations.

    This will affect all archs. Mostly the changes should be relatively easy.
    Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

    struct pt_regs *old_regs = set_irq_regs(regs);

    And put the old one back at the end:

    set_irq_regs(old_regs);

    Don't pass regs through to generic_handle_irq() or __do_IRQ().

    In timer_interrupt(), this sort of change will be necessary:

    - update_process_times(user_mode(regs));
    - profile_tick(CPU_PROFILING, regs);
    + update_process_times(user_mode(get_irq_regs()));
    + profile_tick(CPU_PROFILING);

    I'd like to move update_process_times()'s use of get_irq_regs() into itself,
    except that i386, alone of the archs, uses something other than user_mode().

    Some notes on the interrupt handling in the drivers:

    (*) input_dev() is now gone entirely. The regs pointer is no longer stored in
    the input_dev struct.

    (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
    something different depending on whether it's been supplied with a regs
    pointer or not.

    (*) Various IRQ handler function pointers have been moved to type
    irq_handler_t.

    Signed-Off-By: David Howells
    (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)

    David Howells
     

02 Oct, 2006

1 commit

03 Jul, 2006

1 commit

01 Jul, 2006

1 commit

27 Jun, 2006

1 commit

29 Mar, 2006

1 commit

23 Mar, 2006

1 commit

22 Mar, 2006

1 commit

  • 83485f826   [PATCH] serial: serial_txx9 driver update ... Browse Code »

    Update the serial_txx9 driver.

    * More strict check in verify_port. Cleanup.
    * Do not insert a char caused previous overrun.
    * Fix some spin_locks.
    * Do not call uart_add_one_port for absent ports.

    Also, this patch removes a BROKEN tag from Kconfig. This driver has been
    marked as BROKEN by removal of uart_register_port, but it has been solved
    already on Sep 2005.

    Signed-off-by: Atsushi Nemoto
    Cc: Russell King
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Atsushi Nemoto
     

21 Mar, 2006

1 commit

  • d358788f3   [SERIAL] kernel console should send CRLF not LFCR ... Browse Code »

    Glen Turner reported that writing LFCR rather than the more
    traditional CRLF causes issues with some terminals.

    Since this aflicts many serial drivers, extract the common code
    to a library function (uart_console_write) and arrange for each
    driver to supply a "putchar" function.

    Signed-off-by: Russell King

    Russell King
     

13 Jan, 2006

1 commit

11 Jan, 2006

1 commit

  • 33f0f88f1   [PATCH] TTY layer buffering revamp ... Browse Code »

    The API and code have been through various bits of initial review by
    serial driver people but they definitely need to live somewhere for a
    while so the unconverted drivers can get knocked into shape, existing
    drivers that have been updated can be better tuned and bugs whacked out.

    This replaces the tty flip buffers with kmalloc objects in rings. In the
    normal situation for an IRQ driven serial port at typical speeds the
    behaviour is pretty much the same, two buffers end up allocated and the
    kernel cycles between them as before.

    When there are delays or at high speed we now behave far better as the
    buffer pool can grow a bit rather than lose characters. This also means
    that we can operate at higher speeds reliably.

    For drivers that receive characters in blocks (DMA based, USB and
    especially virtualisation) the layer allows a lot of driver specific
    code that works around the tty layer with private secondary queues to be
    removed. The IBM folks need this sort of layer, the smart serial port
    people do, the virtualisers do (because a virtualised tty typically
    operates at infinite speed rather than emulating 9600 baud).

    Finally many drivers had invalid and unsafe attempts to avoid buffer
    overflows by directly invoking tty methods extracted out of the innards
    of work queue structs. These are no longer needed and all go away. That
    fixes various random hangs with serial ports on overflow.

    The other change in here is to optimise the receive_room path that is
    used by some callers. It turns out that only one ldisc uses receive room
    except asa constant and it updates it far far less than the value is
    read. We thus make it a variable not a function call.

    I expect the code to contain bugs due to the size alone but I'll be
    watching and squashing them and feeding out new patches as it goes.

    Because the buffers now dynamically expand you should only run out of
    buffering when the kernel runs out of memory for real. That means a lot of
    the horrible hacks high performance drivers used to do just aren't needed any
    more.

    Description:

    tty_insert_flip_char is an old API and continues to work as before, as does
    tty_flip_buffer_push() [this is why many drivers dont need modification]. It
    does now also return the number of chars inserted

    There are also

    tty_buffer_request_room(tty, len)

    which asks for a buffer block of the length requested and returns the space
    found. This improves efficiency with hardware that knows how much to
    transfer.

    and tty_insert_flip_string_flags(tty, str, flags, len)

    to insert a string of characters and flags

    For a smart interface the usual code is

    len = tty_request_buffer_room(tty, amount_hardware_says);
    tty_insert_flip_string(tty, buffer_from_card, len);

    More description!

    At the moment tty buffers are attached directly to the tty. This is causing a
    lot of the problems related to tty layer locking, also problems at high speed
    and also with bursty data (such as occurs in virtualised environments)

    I'm working on ripping out the flip buffers and replacing them with a pool of
    dynamically allocated buffers. This allows both for old style "byte I/O"
    devices and also helps virtualisation and smart devices where large blocks of
    data suddenely materialise and need storing.

    So far so good. Lots of drivers reference tty->flip.*. Several of them also
    call directly and unsafely into function pointers it provides. This will all
    break. Most drivers can use tty_insert_flip_char which can be kept as an API
    but others need more.

    At the moment I've added the following interfaces, if people think more will
    be needed now is a good time to say

    int tty_buffer_request_room(tty, size)

    Try and ensure at least size bytes are available, returns actual room (may be
    zero). At the moment it just uses the flipbuf space but that will change.
    Repeated calls without characters being added are not cumulative. (ie if you
    call it with 1, 1, 1, and then 4 you'll have four characters of space. The
    other functions will also try and grow buffers in future but this will be a
    more efficient way when you know block sizes.

    int tty_insert_flip_char(tty, ch, flag)

    As before insert a character if there is room. Now returns 1 for success, 0
    for failure.

    int tty_insert_flip_string(tty, str, len)

    Insert a block of non error characters. Returns the number inserted.

    int tty_prepare_flip_string(tty, strptr, len)

    Adjust the buffer to allow len characters to be added. Returns a buffer
    pointer in strptr and the length available. This allows for hardware that
    needs to use functions like insl or mencpy_fromio.

    Signed-off-by: Alan Cox
    Cc: Paul Fulghum
    Signed-off-by: Hirokazu Takata
    Signed-off-by: Serge Hallyn
    Signed-off-by: Jeff Dike
    Signed-off-by: John Hawkes
    Signed-off-by: Martin Schwidefsky
    Signed-off-by: Adrian Bunk
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Alan Cox
     

10 Jan, 2006

1 commit

10 Sep, 2005

1 commit

  • f5ee56cc1   [PATCH] txx9 serial update ... Browse Code »

    Support for the new RBHMA4500 eval board for the TX4938. General update
    from the 8250 ancestor of this driver. Replace use of deprecated
    interfaces.

    Signed-off-by: Ralf Baechle
    Signed-off-by: Atsushi Nemoto
    Acked-by: Russell King
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Ralf Baechle
     

31 Aug, 2005

1 commit

  • b129a8ccd   [SERIAL] Clean up and fix tty transmission start/stoping ... Browse Code »

    The start_tx and stop_tx methods were passed a flag to indicate
    whether the start/stop was from the tty start/stop callbacks, and
    some drivers used this flag to decide whether to ask the UART to
    immediately stop transmission (where the UART supports such a
    feature.)

    There are other cases when we wish this to occur - when CTS is
    lowered, or if we change from soft to hard flow control and CTS
    is inactive. In these cases, this flag was false, and we would
    allow the transmitter to drain before stopping.

    There is really only one case where we want to let the transmitter
    drain before disabling, and that's when we run out of characters
    to send.

    Hence, re-jig the start_tx and stop_tx methods to eliminate this
    flag, and introduce new functions for the special "disable and
    allow transmitter to drain" case.

    Signed-off-by: Russell King

    Russell King
     

29 Jun, 2005

1 commit

  • c5f4644e6   [PATCH] Serial: Adjust serial locking ... Browse Code »

    This patch changes the way serial ports are locked when getting modem
    status. This change is necessary because we will need to atomically
    read the modem status and take action depending on the CTS status.

    Signed-off-by: Russell King

    Russell King
     

10 May, 2005

1 commit

17 Apr, 2005

2 commits

  • 0370affee   [PATCH] fix u32 vs. pm_message_t in drivers/ ... Browse Code »

    -rc2-mm1 still contains few places where u32 and pm_message_t. This fixes
    drivers/serial [should change no code].

    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Pavel Machek
     
  • 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

    Initial git repository build. I'm not bothering with the full history,
    even though we have it. We can create a separate "historical" git
    archive of that later if we want to, and in the meantime it's about
    3.2GB when imported into git - space that would just make the early
    git days unnecessarily complicated, when we don't have a lot of good
    infrastructure for it.

    Let it rip!

    Linus Torvalds