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path: root/drivers/serial/sh-sci.c
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* sh: Add SCIF2 support for SH7763.Nobuhiro Iwamatsu2008-07-28
| | | | | | | | | SH7763 has 3 SCIF device. Current code supports SCIF0 and 1. SCIF0 and 1 are same register constitution, but only SCIF2 is different. I added support of SCIF2. Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* Fix compile errors in SGI console drivers (linux-next tree)Takashi Iwai2008-07-20
| | | | | | | | | | The below is the patch to replace blindly all possible places, including Jack's fixes. Signed-off-by: Takashi Iwai <tiwai@suse.de> (Reviewed and checked rather than blindly added) Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sh: use the common ascii hex helpersHarvey Harrison2008-05-16
| | | | | Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh-sci: improve sh7722 supportMagnus Damm2008-05-08
| | | | | | | | Improve sh7722 support for SCIF1 and SCIF2 and separate code from sh7366 implementation. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Enable use of the clk fwk on SH-5.Paul Mundt2008-05-08
| | | | Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: replace remaining __FUNCTION__ occurrencesHarvey Harrison2008-04-30
| | | | | | | | __FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sh: Add support for SH7723 CPU subtype.Paul Mundt2008-04-18
| | | | | | This adds basic support for the SH7723 MobileR2 CPU. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: fix platform driver hotplug/coldplugKay Sievers2008-04-15
| | | | | | | | | | | | | | | | | Since 43cc71eed1250755986da4c0f9898f9a635cb3bf, the platform modalias is prefixed with "platform:". Add MODULE_ALIAS() to the hotpluggable serial platform drivers, to re-enable auto loading. NOTE that Kconfig for some of these drivers doesn't allow modular builds, and thus doesn't match the driver source's unload support. Presumably their unload code is buggy and/or weakly tested... [dbrownell@users.sourceforge.net: more drivers, registration fixes] Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* serial: sh-sci: Fix fifo stall on SH7760/SH7780/SH7785 SCIF.Yutaro Ebihara2008-03-11
| | | | | | | | There was an off-by-1 in the SCRFDR calculation that caused writes over 128-bytes to hang in the FIFO. Fix it up. Signed-off-by: Yutaro Ebihara <ebiharaml@si-linux.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: Move asm-sh/sci.h to linux/serial_sci.h.Paul Mundt2008-02-26
| | | | | | | | | | | | This header is needed on other architectures as well (namely h8300), which currently fails to build without this in place. Rather than duplicating the port definition completely there, just move this to a common location instead. This should get h8300 working again for 2.6.25, in addition to the changes already pushed by Sato-san in -rc2. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: add support for sh7366 processorMagnus Damm2008-02-14
| | | | | | | | This patch adds sh7366 cpu supports. Just the most basic things like interrupt controller, clocks and serial port are included at this point. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Add support for SH7763 CPU subtype.Yoshihiro Shimoda2008-01-27
| | | | | Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Add support for SH7721 CPU subtype.Yoshihiro Shimoda2008-01-27
| | | | | Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: sh-sci: kgdb console build fixes.Paul Mundt2007-09-20
| | | | | | | | | | | The kgdb console code requires uart_set_options() and friends, which are only provided by the serial core when console support is enabled. These were sitting under CONFIG_SH_KGDB and resulted in a link error when console support wasn't enabled, work that by rolling the console routines under CONFIG_SH_KGDB_CONSOLE, which they should have been all along. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Add SH7720 CPU support.Markus Brunner2007-09-20
| | | | | | | | This adds support for the SH7720 (SH3-DSP) CPU. Signed-off by: Markus Brunner <super.firetwister@gmail.com> Signed-off by: Mark Jonas <toertel@gmail.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: sh-sci: Tidy cpufreq printk.Paul Mundt2007-09-20
| | | | | | This was a bit more verbose than it needed to be. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: remove support for sh7300 and solution engine 7300Magnus Damm2007-07-26
| | | | | | | | | This patch removes old dead code: - kill off sh7300 cpu support - get rid of broken solution engine 7300 board support Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Preliminary support for the SH-X3 CPU.Paul Mundt2007-06-20
| | | | | | This adds basic support for UP SH-X3. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: sh-sci: Fix module clock refcount for serial console.Paul Mundt2007-05-06
| | | | Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: sh-sci: Fix module clock refcounting.dmitry pervushin2007-05-06
| | | | | | | This adds the enable/disable hooks for the port clock to sh-sci. Signed-off-by: dmitry pervushin <dimka@nomadgs.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: MS7712SE01 board support.Nobuhiro Iwamatsu2007-05-06
| | | | | | | Support the SH7712 (SH3-DSP) Solution Engine reference board. Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: sh-sci: Kill off breakpoint in break IRQ.Paul Mundt2007-05-06
| | | | | | | | | With the GDB stub being entered via a special sysrq trigger, we don't want to hit it directly from sci_br_interrupt(). Without this, there is access to the other sysrq triggers when kgdb is enabled. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Add SH7785 Highlander board support (R7785RP).Paul Mundt2007-05-06
| | | | | | | | | | | This adds preliminary support for the SH7785-based Highlander board. Some of the Highlander support code is reordered so that most of it can be reused directly. This also plugs in missing SH7785 checks in the places that need it, as this is the first board to support the CPU. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Bring kgdb back from the dead.Paul Mundt2007-05-06
| | | | | | | | This code has suffered quite a bit of bitrot, do some basic tidying to get it to a reasonably functional state again. This gets the basic support and the console working again. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* serial: Fix sh-sci break interrupt/sysrq handling.Paul Mundt2007-03-14
| | | | | | | | | | | | The sh-sci sci_br_interrupt() handler was failing to call in to uart_handle_break(), which was something that only the SH-3 path was doing, fix that up. Additionally, SUPPORT_SYSRQ seems to have moved down too far, move it back to the top so uart_handle_break() and friends aren't no-ops. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: SH-MobileR SH7722 CPU support.Paul Mundt2006-12-11
| | | | | | This adds CPU support for the SH7722. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* [PATCH] tty: switch to ktermiosAlan Cox2006-12-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <alan@redhat.com> Signed-off-by: Martin Peschke <mp3@de.ibm.com> Acked-by: Peter Oberparleiter <oberpar@de.ibm.com> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* sh: Clock framework tidying.Paul Mundt2006-12-05
| | | | | | | | This syncs up the SH clock framework with the linux/clk.h API, for which there were only some minor changes required, namely the clk_get() dev_id and subsequent callsites. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Updates for IRQ handler changes.Paul Mundt2006-10-06
| | | | | | Trivial fixes for build breakage introduced by IRQ handler changes. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells2006-10-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
* Remove all inclusions of <linux/config.h>Dave Jones2006-10-04
| | | | | | kbuild explicitly includes this at build time. Signed-off-by: Dave Jones <davej@redhat.com>
* serial: Rework sh-sci for driver model.Paul Mundt2006-09-27
| | | | | | | | | sh-sci was turning in to an unmaintainable mess, especially with regards to the port list. This cleans it up quite a bit, and switches over to a platform device model where subtypes will register their port list individually in their setup code. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh64: Trivial build fixes.Paul Mundt2006-09-12
| | | | | | | | | While we've been sorting out the toolchain fiasco, some of the code has suffered a bit of bitrot. Building with GCC4 also brings up some more build warnings. Trivial fixes for both issues. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* [PATCH] irq-flags: serial: Use the new IRQF_ constantsThomas Gleixner2006-07-02
| | | | | | | | | | Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-30
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [PATCH] devfs: Remove devfs support from the serial subsystemGreg Kroah-Hartman2006-06-26
| | | | | | Also fixes all serial drivers. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [SERIAL] uart_port flags member should use UPF_*Russell King2006-02-05
| | | | | | Convert usage of ASYNC_* to UPF_*. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [SERIAL] uart_port iotype member should use UPIO_*Russell King2006-02-05
| | | | | | Convert usage of SERIAL_IO_* to UPIO_*. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] sh: sh-sci clock framework updatesPaul Mundt2006-02-01
| | | | | | | | | | | | A couple of updates for the sh-sci serial driver: - Update for clock framework on sh. - Fix a compile error introduced by some h8300 changes. - Add SH7770/SH7780 subtype support. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [SERIAL] Don't use ASYNC_ constants with the uart_port structureRussell King2006-01-21
| | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [PATCH] TTY layer buffering revampAlan Cox2006-01-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sh-sci.c sci_start_tx errorYoshinori Sato2005-10-14
| | | | | | | | | Argument does not agree. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [SERIAL] Clean up and fix tty transmission start/stopingRussell King2005-08-31
| | | | | | | | | | | | | | | | | | | | | | | 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 <rmk+kernel@arm.linux.org.uk>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-16
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!
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