- 02 10月, 2006 3 次提交
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由 Jonathan McDowell 提交于
The patch below is necessary for 115200 baud on an OMAP1510 internal UART. It's been in the linux-omap tree for some time and with it applied to a vanilla Linus git tree the serial console on the Amstrad Delta (which is OMAP1510 based and whose initial bootloader runs at 115200) works fine (it doesn't without it). Signed-off-by: NJonathan McDowell <noodles@earth.li> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Sergei Shtylyov 提交于
8250.c and serial_txx9.c port suspend/resume handler still have this obsolete argument documented... Signed-off-by: NSergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Sergei Shtylyov 提交于
I think register ranges obviously need to be claimed/released for all UARTs including those with UPIO_MEM32 and UPIO_TSI iotype. Also, serial8250_request_rsa_resources() returns false positives with UPIO_MEM32, UPIO_AU, and UPIO_TSI iotype -- I don't think this makes any sense. Signed-off-by: NSergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 10 7月, 2006 2 次提交
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由 Andrew Morton 提交于
Fix http://bugzilla.kernel.org/show_bug.cgi?id=6716 Doing a sysrq over a serial line into an SMP machine presently deadlocks. Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Zang Roy-r61911 提交于
The following patch gets rid of CONFIG_TSI108_BRIDGE. I add UPIO_TSI to handle IIR and IER register in serial_in and serial_out. (1) the reason to rewrite serial_in: TSI108 rev Z1 version ERRATA. Reading the UART's Interrupt Identification Register (IIR) clears the Transmit Holding Register Empty (THRE) and Transmit buffer Empty (TEMP) interrupts even if they are not enabled in the Interrupt Enable Register (IER). This leads to loss of the interrupts. Interrupts are not cleared when reading UART registers as 32-bit word. (2) the reason to rewrite serial_out: Check for UART_IER_UUE bit in the autoconfig routine. This section of autoconfig is excluded for Tsi108/109 because bits 7 and 6 are reserved for internal use. They are R/W bits. In addition to incorrect identification, changing these bits (from 00) will make Tsi108/109 UART non-functional. Signed-off-by: NRoy Zang <tie-fei.zang@freescale.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 03 7月, 2006 1 次提交
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由 Thomas Gleixner 提交于
Signed-off-by: NThomas 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: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 01 7月, 2006 1 次提交
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由 Jörn Engel 提交于
Signed-off-by: NJörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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- 27 6月, 2006 1 次提交
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由 Greg Kroah-Hartman 提交于
Also fixes all serial drivers. Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 02 5月, 2006 1 次提交
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由 Russell King 提交于
x86 SMP breaks as a result of the previous change, we have no real option other than to add locking to the 8250 console write function. If an oops is in progress, try to acquire the lock. If we fail to do so, continue anyway. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 30 4月, 2006 3 次提交
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由 Russell King 提交于
A bug report from Gerd Hoffmann has highlighted that unconditionally enabling the transmit interrupt at the end of console writes is very bad. In Gerd's case, it causes the test for buggy UARTs to give false positives, incorrectly identifying ports as buggy when they are not. Moreover, if we unconditionally enable the interrupt, and the port is sharing it's interrupt with other ports, there is the very real possibility that we'll cause an interrupt storm. (Not all ports use OUT2 as an interrupt mask.) Hence, revert part of f91a3715 and all of f5968b37 until a better solution can be found. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Jon Anders Haugum 提交于
Alchemy SoC uart have got a non-standard divisor register that needs some special handling. This patch adds divisor read/write functions with test and special handling for Alchemy internal uart. Signed-off-by: NJon Anders Haugum <jonah@omegav.ntnu.no> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Sergei Shtylyov 提交于
I've noticed that the 8250/Au1x00 driver (drivers/serial/8250_au1x00.c) doesn't claim UART memory ranges and uses wrong (KSEG1-based) UART addresses instead of the physical ones. Signed-off-by: NSergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 29 3月, 2006 1 次提交
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由 Alexey Dobriyan 提交于
Fix a lot of typos. Eyeballed by jmc@ in OpenBSD. Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 21 3月, 2006 1 次提交
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由 Russell King 提交于
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: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 23 2月, 2006 1 次提交
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由 Russell King 提交于
early_serial_setup() must not be called after console initialisation. Add a comment prior to the function explicitly stating this. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 15 2月, 2006 1 次提交
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由 Ralf Baechle 提交于
Signed-off-by: NRalf Baechle <ralf@linux-mips.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 09 2月, 2006 1 次提交
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由 Kumar Gala 提交于
On some embedded PowerPC (MPC834x) systems an extra byte would some times be required to flush data out of the fifo. serial8250_console_write() was updating the IER in hardware without also updating the copy in uart_8250_port. This causes issues functions like serial8250_start_tx() and __stop_tx() to misbehave. Signed-off-by: NKumar Gala <galak@kernel.crashing.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 22 1月, 2006 1 次提交
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由 Russell King 提交于
The functionality UPF_BOOT_ONLYMCA provided has been replaced by the 8250_mca module, which only registers MCA ports if MCA is present. UPF_AUTOPROBE has no functional effect - in fact, it's never tested. Only ibmasm set the flag. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 21 1月, 2006 1 次提交
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由 Alan Cox 提交于
This patch resolves most of the problems with an SMP serial console race with output via the tty path. At the end of the serial console print we force enable the tx int in case we clobbered the tx interrupt status racing between the console and tty output. That way the extra tx interrupt causes the transmit path to restart not hang. It also makes the serial console printk use the FIFO. This is neccessary because some remote management devices fake serial console with FIFO and are confused into sending one packet per character over ethernet when we stall rather than filling the FIFO. In order to preserve existing reliability semantics the function waits for the serial queue to completely empty before returning. Both of these problems were identified by a Red Hat partner. Signed-off-by: NAlan Cox <alan@redhat.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 18 1月, 2006 1 次提交
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由 Russell King 提交于
Commit 7493a314 changed the ordering of the registration of the platform device driver vs the 8250 drivers internal initialisation. This led to the probe function being called before the driver had finished its internal initialisation, causing mayhem. Revert the ordering change. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 14 1月, 2006 1 次提交
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由 Dmitry Torokhov 提交于
Do not use platform_device_register_simple() as it is going away. Also set up driver's owner to create link driver->module in sysfs. Signed-off-by: NDmitry Torokhov <dtor@mail.ru> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 13 1月, 2006 1 次提交
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由 Arjan van de Ven 提交于
Turn several drivers/serial/ semaphores-used-as-mutex into mutexes Signed-off-by: NArjan van de Ven <arjan@infradead.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 11 1月, 2006 1 次提交
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由 Alan Cox 提交于
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: NAlan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: NHirokazu Takata <takata@linux-m32r.org> Signed-off-by: NSerge Hallyn <serue@us.ibm.com> Signed-off-by: NJeff Dike <jdike@addtoit.com> Signed-off-by: NJohn Hawkes <hawkes@sgi.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: NAdrian Bunk <bunk@stusta.de> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 08 1月, 2006 1 次提交
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由 Dave Jones 提交于
Also add a nr_uarts module option to the 8250 code to override this, up to a maximum of CONFIG_SERIAL_8250_NR_UARTS This should appease people who complain about a proliferation of /dev/ttyS & /sysfs nodes whilst at the same time allowing a single kernel image to support the rarer occasions of lots of devices. Signed-off-by: NDave Jones <davej@redhat.com>
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- 05 1月, 2006 4 次提交
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由 Russell King 提交于
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Russell King 提交于
All call sites for serial8250_handle_port() acquired the port spinlock and released it afterwards. This is a needless duplication of code. Move the spinlocking inside serial8250_handle_port(). Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Russell King 提交于
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Russell King 提交于
Reading the MSR register on 8250-compatible UARTs results in any modem status interrupts being cleared. To avoid missing any status changes, arrange for get_mctrl() to read the current status via check_modem_status(), which will process any pending state changes for us. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 29 11月, 2005 1 次提交
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由 Arjan van de Ven 提交于
This patch marks a few serial data structures const, moving them to .rodata where they won't false-share cachelines with things that get written to. Signed-off-by: NArjan van de Ven <arjan@infradead.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 13 11月, 2005 1 次提交
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由 Lennert Buytenhek 提交于
xscale-type UARTs have an extra bit (UUE) in the IER register that has to be written as 1 to enable the UART. At the end of autoconfig() in drivers/serial/8250.c, the IER register is unconditionally written as zero, which turns off the UART, and makes any subsequent printch() hang the box. Since other 8250-type UARTs don't have this enable bit and are thus always 'enabled' in this sense, it can't hurt to enable xscale-type serial ports all the time as well. The attached patch changes the autoconfig() exit path to see if the port has an UUE enable bit, and if yes, to write UUE=1 instead of just putting a zero into IER, using the same test as is used at the beginning of serial8250_console_write(). Signed-off-by: NLennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 10 11月, 2005 1 次提交
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由 Russell King 提交于
This allows us to eliminate the casts in the drivers, and eventually remove the use of the device_driver function pointer methods for platform device drivers. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk> Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 07 11月, 2005 1 次提交
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由 Andrew Morton 提交于
Large console spews from IRQ or local_irq_disable() sections can cause the NMI watchdog to go off. Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 06 11月, 2005 1 次提交
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由 Pantelis Antoniou 提交于
The offsets of the registers are in a different place, and some parts cannot handle a full set of modem control signals. Signed-off-by: NPantelis Antoniou <pantelis@embeddedalley.ocm> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 30 10月, 2005 1 次提交
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由 Russell King 提交于
Convert everyone who uses platform_bus_type to include linux/platform_device.h. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk> Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 29 10月, 2005 1 次提交
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由 Russell King 提交于
In PM v1, all devices were called at SUSPEND_DISABLE level. Then all devices were called at SUSPEND_SAVE_STATE level, and finally SUSPEND_POWER_DOWN level. However, with PM v2, to maintain compatibility for platform devices, I arranged for the PM v2 suspend/resume callbacks to call the old PM v1 suspend/resume callbacks three times with each level in order so that existing drivers continued to work. Since this is obsolete infrastructure which is no longer necessary, we can remove it. Here's an (untested) patch to do exactly that. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 09 9月, 2005 1 次提交
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由 Russell King 提交于
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 08 9月, 2005 1 次提交
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由 Russell King 提交于
Rather than hard-coding the platform device IDs, enumerate them. We don't particularly care about the actual ID we get, just as long as they're unique. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 01 9月, 2005 1 次提交
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由 Sascha Hauer 提交于
Patch from Sascha Hauer This patch adds support for setting and getting RTS / CTS via set_mtctrl / get_mctrl functions. Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 01 7月, 2005 1 次提交
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由 Russell King 提交于
If CONFIG_SERIAL_8250_NR_UARTS is smaller than the array size in asm/serial.h, we trampled on memory which wasn't ours. Take our big boots away by limiting the number of ports initialised to the smaller of ...NR_UARTS and the array size. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 30 6月, 2005 1 次提交
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由 Russell King 提交于
Remove legacy ISA serial ports for Accent, Boca, Fourport, Hub6 and MCA from the architecture specific serial.h include. The only ports which remain in asm-*/serial.h are the platform specific entries. These should really be converted by platform maintainers to use a platform device, such as can be found in arch/arm/mach-footbridge/isa.c Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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