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path: root/drivers/serial/imx.c
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2009-08-07i.MX serial: do not use #ifdef CONFIG_ARCH_*Sascha Hauer1-43/+22
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2009-06-16imx: Check for NULL pointer deref before calling tty_encode_baud_rateSascha Hauer1-5/+7
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-15Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds1-10/+3
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (417 commits) MAINTAINERS: EB110ATX is not ebsa110 MAINTAINERS: update Eric Miao's email address and status fb: add support of LCD display controller on pxa168/910 (base layer) [ARM] 5552/1: ep93xx get_uart_rate(): use EP93XX_SYSCON_PWRCNT and EP93XX_SYSCON_PWRCN [ARM] pxa/sharpsl_pm: zaurus needs generic pxa suspend/resume routines [ARM] 5544/1: Trust PrimeCell resource sizes [ARM] pxa/sharpsl_pm: cleanup of gpio-related code. [ARM] pxa/sharpsl_pm: drop set_irq_type calls [ARM] pxa/sharpsl_pm: merge pxa-specific code into generic one [ARM] pxa/sharpsl_pm: merge the two sharpsl_pm.c since it's now pxa specific [ARM] sa1100: remove unused collie_pm.c [ARM] pxa: fix the conflicting non-static declarations of global_gpios[] [ARM] 5550/1: Add default configure file for w90p910 platform [ARM] 5549/1: Add clock api for w90p910 platform. [ARM] 5548/1: Add gpio api for w90p910 platform [ARM] 5551/1: Add multi-function pin api for w90p910 platform. [ARM] Make ARM_VIC_NR depend on ARM_VIC [ARM] 5546/1: ARM PL022 SSP/SPI driver v3 ARM: OMAP4: SMP: Update defconfig for OMAP4430 ARM: OMAP4: SMP: Enable SMP support for OMAP4430 ...
2009-06-11imx: serial: use tty_encode_baud_rate to set true rateOskar Schirmer1-0/+7
real baud rate may be different from the one requested. for upper layers, set the nearest value to the real rate in favour of the rate previously requested. Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11imx: serial: add IrDA support to serial driverFabian Godehardt1-19/+176
Using the iMX serial driver with an IrDA device needs extra peripheral settings and specific timing depending on the transmitter circuitry used. Signed-off-by: Fabian Godehardt <fg@emlix.com> Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11imx: serial: use rational library functionOskar Schirmer1-20/+10
for calculation of numerator and denominator used in baud rate setting, use generic library function for optimum settings. Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11imx: serial: handle initialisation failure correctlyDaniel Glöckner1-1/+6
correctly de-initialise device when setting up failed, call to pdata->exit() was missing. Signed-off-by: Daniel Glöckner <dg@emlix.com> Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11imx: serial: be sure to stop xmit upon shutdownFabian Godehardt1-0/+4
needed to avoid continued transmission by hardware while software already shuts down, which might cause dangling characters to show up in hardware queues when restarting the device. Signed-off-by: Fabian Godehardt <fg@emlix.com> Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11imx: serial: notify higher layers in case xmit IRQ was not calledFabian Godehardt1-0/+3
upper layers, namely line discipline, need to be notified when transmission of more data is possible. For spurious cases, where IRQ handling does not supply notification for sure, it is given additionally here, when data has just been transmitted and space in the buffer will most probably be available. Signed-off-by: Fabian Godehardt <fg@emlix.com> Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11imx: serial: fix one bit field typeDaniel Glöckner1-1/+1
"have_rtscts" is assigned 1, while it is declared int:1, two's complement, which can hold 0 and -1 only. The code works, as the upper bits are cut off, and tests are done against 0 only. Nonetheless, correctly declaring the bit field as unsigned int:1 renders the code more robust. Signed-off-by: Daniel Glöckner <dg@emlix.com> Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11imx: serial: fix whitespaces (no changes in functionality)Oskar Schirmer1-25/+23
Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-03fix oops when using console=ttymxcN with N > 0Eric Lammerts1-0/+2
Signed-off-by: Eric Lammerts <eric@lammerts.org> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2009-05-20fix oops when using console=ttymxcN with N > 0Eric Lammerts1-0/+2
Signed-off-by: Eric Lammerts <eric@lammerts.org> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2009-05-07[ARM] Remove arch-imx from build systemSascha Hauer1-10/+3
arch-imx is superseeded by the MXC architecture support. This patch removes arch-imx from the build system. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2009-03-13[ARM] MXC: remove _clk suffix from clock namesSascha Hauer1-1/+1
The context makes it clear already that these are clocks, so there's no need for such a suffix. This patch only changes the clocks actually used in the tree. The remaining clocks are renamed in the subsequent architecture specific patches. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-12-18[ARM] MXC: remove dependency to other include files from irqs.hSascha Hauer1-1/+1
This patch removes the inclusion of mach/hardware.h from mach/irqs.h and switches to more meaningful names for the irq related macros. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-12-16patch-mx1-UART-supportPaulius Zaleckas1-3/+3
Adds support for MX1 architecture to UART driver. Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-09-02imx serial: fix rts handling for non imx1 based hardwareMarc Kleine-Budde1-1/+1
The interrupt handler for muxed interrupts (imx2/imx3) was calling the rts handling subroutine if the RTSS bit was set. (Which indicates the status of the RTS line), leading to an interrupt flood on RTS bit low. This patch fixes the problem by looking at the RTSD bit instead, indicating a change in the RTS line. Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-09-02imx serial: set RXD mux bit on i.MX27 and i.MX31Marc Kleine-Budde1-2/+13
RX in i.MX27 and i.MX31 UART lines does not work unless the "RXD Muxed Input Select" bit is set on i.MX27 and i.MX31 processors. This patch sets the missing RXD mux bit in the UCR3 register. Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-09-02i.MX serial: fix init failureDarius Augulis1-2/+8
Adds extra "out" label to probe function after calling .init form platform data. Because .init can return error number caused by gpio request fail. Signed-off-by: Darius Augulis <augulis.darius@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-08-07[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/machRussell King1-2/+2
This just leaves include/asm-arm/plat-* to deal with. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-07[ARM] Remove asm/hardware.h, use asm/arch/hardware.h insteadRussell King1-1/+1
Remove includes of asm/hardware.h in addition to asm/arch/hardware.h. Then, since asm/hardware.h only exists to include asm/arch/hardware.h, update everything to directly include asm/arch/hardware.h and remove asm/hardware.h. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-07-21Fix compile errors in SGI console drivers (linux-next tree)Takashi Iwai1-1/+1
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>
2008-07-05MX2 add support for mx2 in i.MX serial driverSascha Hauer1-3/+3
add support for mx2 in i.MX serial driver Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-05mxc: add MX3 support for i.MX internal UART driverSascha Hauer1-20/+80
This patch adds MX3 support for the i.MX internal uart driver. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-05IMX: introduce clock APISascha Hauer1-4/+21
This patch introduces the clock API for i.MX and converts all in-Kernel drivers to use it. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-05IMX UART: remove statically initialized tablesSascha Hauer1-75/+54
This patch removes the statically initialized tables from the i.MX serial driver and makes the driver fully dependent on the information provided by the platform_device. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-05IMX UART: Add board specific init/exit functionsSascha Hauer1-9/+19
Add platform specific init functions. Also rename the struct platform_device dev into pdev. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-05IMX UART: do not assume 16MHz reference frequencySascha Hauer1-11/+39
We assumed a 16MHz reference frequency for the UART. While this is true for i.MX1 most of the time it is not true for MX27/MX31. Also, add handling for the ONEMS register which is present on newer versions of the chip and pass a sane minimum baudrate to uart_get_baud_rate(). Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-04-19Merge branch 'merge-fixes' into develRussell King1-0/+2
2008-04-17[ARM] 4999/1: <IMX UART>: fix membaseSascha Hauer1-2/+2
The membase field in struct uart_port should be the the physical address. This patch fixes it. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-04-17[ARM] 4998/1: <IMX UART>: do not use hardcoded io space sizeSascha Hauer1-10/+15
Do not use hardcoded io space size. Instead use the information provided by the resource. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-04-17[ARM] 4996/1: <IMX UART>: do not enable tx empty interrupt on startupSascha Hauer1-1/+1
We are not interested in tranceiver empty interrupts until we actually sent a buffer. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-04-17[ARM] 4995/1: <IMX UART>: Do not use URXD_CHARRDY for pollingSascha Hauer1-1/+3
Do not use the URXD_CHARRDY bit for polling for new characters. This works on i.MX1, but on MX31 the datasheet states that this bit should not be used for polling. On MX27 it is even worse, here we get a bus error when we access the read FIFO when no character is present. Instead, use USR2_RDR (receive data ready) bit. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-04-17[ARM] 4994/1: <IMX UART>: Move error handling into execution pathSascha Hauer1-41/+33
Move the error handling code for erroneous receive characters into execution path. This makes the code more readable and the compiler should know how to optimize this, right? Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-04-17[ARM] 4993/1: <IMX UART>: Trivial: Remove unused definesSascha Hauer1-4/+0
This patch removes the unused defines NR_PORTS and IMX_ISR_PASS_LIMIT in the imx serial driver. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-04-16serial: fix platform driver hotplug/coldplugKay Sievers1-0/+2
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>
2008-02-06Remove pointless casts from void pointersJeff Garzik1-2/+2
Mostly in and around irq handlers. Signed-off-by: Jeff Garzik <jgarzik@redhat.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: "Luck Tony" <tony.luck@intel.com> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Dmitry Torokhov <dtor@mail.ru> Cc: Karsten Keil <kkeil@suse.de> Acked-by: "John W. Linville" <linville@tuxdriver.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: David Brownell <david-b@pacbell.net> Cc: "Antonino A. Daplas" <adaplas@pol.net> Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Acked-by: Holger Schurig <hs4233@mail.mn-solutions.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-20[ARM] 4481/1: Fix a bug when i.MX is compiled as a moduleSascha Hauer1-1/+1
Fix the unregistration order in the i.MX serial driver Signed-off-by: Sreekrishnan Venkateswaran <krishhna@gmail.com> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-05-03[ARM] 4328/1: Move i.MX UART regs to driverSascha Hauer1-63/+205
This patch moves the i.MX UART register descriptions from include/asm-arm/arch-imx/imx-regs.h to the serial driver itself. This helps using the driver on other architectures like mx31 Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-02-11[ARM] i.MX serial: fix IRQ allocationPavel Pisa1-1/+2
If RTS interrupt is caused by RTS senzing logic inside i.MX UART module the IRQ type cannot be set. It applies only for interrupts going through GPIO layer. The problem has been noticed by Konstantin Kletschke some time ago. No IRQF_TRIGGER set_type function for IRQ 26 (MPU) I would not change type to fixed 0, because it could be possible to use different GPIO MX1 pin for RTS in the theory. On the other hand it is only for documentation purposes now, because RTS read code would have to be adjusted in such case. Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-02-11[ARM] i.MX serial: fix tx buffer overflowsSascha Hauer1-6/+5
Fix occasional tx buffer overflows in the i.MX serial driver which came from the fact that space in the buffer was checked after sending the first byte. Also, fifosize is 32 bytes, not 8. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de Acked-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-12-08[PATCH] tty: switch to ktermiosAlan Cox1-2/+2
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>
2006-10-05IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells1-4/+4
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)
2006-07-03[PATCH] irq-flags: serial: Use the new IRQF_ constantsThomas Gleixner1-1/+1
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>
2006-06-30Remove obsolete #include <linux/config.h>Jörn Engel1-1/+0
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-06-26[PATCH] devfs: Remove devfs support from the serial subsystemGreg Kroah-Hartman1-1/+0
Also fixes all serial drivers. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-05-04[ARM] 3490/1: i.MX: move uart resources to board filesSascha Hauer1-24/+16
Patch from Sascha Hauer This patch moves the i.MX uart resources and the gpio pin setup to the board files. This allows the boards to decide how many internal uarts are connected to the outside world and whether they use rts/cts or not. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-03-20[SERIAL] kernel console should send CRLF not LFCRRussell King1-17/+9
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 <rmk+kernel@arm.linux.org.uk>
2006-02-05[SERIAL] uart_port iotype member should use UPIO_*Russell King1-2/+2
Convert usage of SERIAL_IO_* to UPIO_*. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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