25 Jul, 2007
1 commit
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At present, various parts of the serial code use unsigned long to define
resource addresses. This is a problem, because some 32-bit platforms have
physical addresses larger than 32-bits, and have mmio serial uarts located
above the 4GB point.This patch changes the type of mapbase in both struct uart_port and struct
plat_serial8250_port to resource_size_t, which can be configured to be 64
bits on such platforms. The mapbase in serial_struct can't safely be
changed, because that structure is user visible.Signed-off-by: David Gibson
Signed-off-by: Josh Boyer
Cc: Russell King
Cc: Paul Mackerras
Cc: Jason Wessel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
18 Jul, 2007
2 commits
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This is a reimplementation of the zs driver for the serial subsystem. Any
resemblance to the old driver is purely coincidential. ;-) I do hope I got
the handling of modem lines right -- better do not tackle me about the
issue unless you feel too good...Any users of the old driver: please note the numbers of the serial lines
have now been swapped, i.e. ttyS0 ttyS1 and ttyS2 ttyS3. It has
to do with the modem lines mentioned above; basically the port A in a given
chip has to be initialised before the port B if you want to use the latter
as the serial console (which is usually the case), as operations on modem
lines of the serial line associated with the port B access both ports (see
the comment at the top of the driver for the details of wiring used).
Please update your scripts.This is also the reason each SCC now requests an IRQ once only (as seen in
"/proc/interrupts") -- the handler takes care of both ports at once as the
line associated with the port B has to take status update interrupts from
both ports (and yet the line of the port A takes its own for itself too).
The old driver never got it right...Signed-off-by: Maciej W. Rozycki
Cc: Ralf Baechle
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This is a driver for the SB1250 DUART, a dual serial port implementation
included in the Broadcom family of SOCs descending from the SiByte SB1250
MIPS64 chip multiprocessor. It is a new implementation replacing the
old-fashioned driver currently present in the linux-mips.org tree. It
supports all the usual features one would expect from a(n asynchronous)
serial driver, including modem line control (as far as hardware supports it
-- there is edge detection logic missing from the DCD and RI lines and the
driver does not implement polling of these lines at the moment), the serial
console, BREAK transmission and reception, including the magic SysRq. The
receive FIFO threshold is not maintained though.The driver was tested with a SWARM board which uses a BCM1250 SOC (which is
dual MIPS64 CMP) and has both ports of the single DUART implemented wired
externally. Both were tested. Testing included using the ports as
terminal lines at 1200bps (which is the ports minimum), 115200bps and a
couple of random speeds inbetween. The modem lines were verified to
operate correctly. No testing was performed with a use as a network
interface, like with SLIP or PPP.Signed-off-by: Maciej W. Rozycki
Acked-by: Ralf Baechle
Cc: Alan Cox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Jun, 2007
1 commit
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The header refers to handle_sysrq(), but does not
include which provides a declaration of the function. This
may result in an implicit declaration and a warning if the actual one is
seen later on.Signed-off-by: Maciej W. Rozycki
Cc: Russell King
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
12 May, 2007
1 commit
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A driver for the KS8695 internal UART.
Based on the 2.6.9 driver from Micrel.
Signed-off-by: Andrew Victor
Signed-off-by: Russell King
08 May, 2007
4 commits
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This patch implements the driver necessary use the Analog Devices Blackfin
processor's Serial Port.Signed-off-by: Bryan Wu
Cc: Alan Cox
Cc: Russell King
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
At present, the serial core always allows setserial in userspace to change the
port address, irq and base clock of any serial port. That makes sense for
legacy ISA ports, but not for (say) embedded ns16550 compatible serial ports
at peculiar addresses. In these cases, the kernel code configuring the ports
must know exactly where they are, and their clocking arrangements (which can
be unusual on embedded boards). It doesn't make sense for userspace to change
these settings.Therefore, this patch defines a UPF_FIXED_PORT flag for the uart_port
structure. If this flag is set when the serial port is configured, any
attempts to alter the port's type, io address, irq or base clock with
setserial are ignored.In addition this patch uses the new flag for on-chip serial ports probed in
arch/powerpc/kernel/legacy_serial.c, and for other hard-wired serial ports
probed by drivers/serial/of_serial.c.Signed-off-by: David Gibson
Cc: Russell King
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add support for the integrated serial ports of the MIPS RM9122 processor
and its relatives.The patch also does some whitespace cleanup.
[akpm@linux-foundation.org: cleanups]
Signed-off-by: Thomas Koeller
Cc: Ralf Baechle
Cc: Russell King
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Serial driver patch for the PMC-Sierra MSP71xx devices.
There are three different fixes:
1 Fix for DesignWare APB THRE errata: In brief, this is a non-standard
16550 in that the THRE interrupt will not re-assert itself simply by
disabling and re-enabling the THRI bit in the IER, it is only re-enabled
if a character is actually sent out.It appears that the "8250-uart-backup-timer.patch" in the "mm" tree
also fixes it so we have dropped our initial workaround. This patch now
needs to be applied on top of that "mm" patch.2 Fix for Busy Detect on LCR write: The DesignWare APB UART has a feature
which causes a new Busy Detect interrupt to be generated if it's busy
when the LCR is written. This fix saves the value of the LCR and
rewrites it after clearing the interrupt.3 Workaround for interrupt/data concurrency issue: The SoC needs to
ensure that writes that can cause interrupts to be cleared reach the UART
before returning from the ISR. This fix reads a non-destructive register
on the UART so the read transaction completion ensures the previously
queued write transaction has also completed.Signed-off-by: Marc St-Jean
Cc: Russell King
Cc: Ralf Baechle
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
15 Feb, 2007
1 commit
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Fix the serial header breakage for the PNX8550 MIPS platform.
Signed-off-by: Vitaly Wool
Cc: Ralf Baechle
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Dec, 2006
1 commit
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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 bugsIf 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
08 Dec, 2006
1 commit
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Add a driver for the Xilinx uartlite serial controller used in boards with
the PPC405 core in the Xilinx V2P/V4 fpgas.The hardware is very simple (baudrate/start/stopbits fixed and no break
support). See the datasheet for details:http://www.xilinx.com/bvdocs/ipcenter/data_sheet/opb_uartlite.pdf
See http://thread.gmane.org/gmane.linux.serial/1237/ for the email thread.
Signed-off-by: Peter Korsgaard
Acked-by: Olof Johansson
Cc: Russell King
Cc: Alan Cox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
05 Oct, 2006
2 commits
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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) -
The at91_serial driver can be used with both AT32 and AT91 devices
from Atmel and has therefore been renamed atmel_serial. The only
thing left is to rename PORT_AT91 PORT_ATMEL.Signed-off-by: Haavard Skinnemoen
Acked-by: Andrew Victor
Signed-off-by: Linus Torvalds
02 Oct, 2006
2 commits
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Make sysrq-K work on serial console by passing in the tty.
Signed-off-by: Andrew Morton
Signed-off-by: Russell King -
A serial card might have been removed when the system is resumed.
This results in a suspended port being shut down, which results in
the ports shutdown method being called twice in a row. This causes
BUGs. Avoid this by tracking the suspended state separately from
the initialised state.Signed-off-by: Russell King
10 Jul, 2006
1 commit
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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: Roy Zang
Signed-off-by: Andrew Morton
Signed-off-by: Russell King
04 Jul, 2006
1 commit
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* 'devel' of master.kernel.org:/home/rmk/linux-2.6-serial:
[SERIAL] Ensure 8250_pci quirks are not marked __devinit
[SERIAL] Convert fifosize to an unsigned int
03 Jul, 2006
1 commit
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Some UARTs have more than 255 bytes of FIFO, which can't be
represented by an unsigned char. Change the kernel's internal
structure to be an unsigned int, but still export an unsigned char
via the TIOCGSERIAL ioctl. If the TIOCSSERIAL ioctl provides a
fifo size of 0, assume this means "don't change" otherwise we'll
corrupt the larger fifo sizes.Signed-off-by: Russell King
27 Jun, 2006
1 commit
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Also fixes all serial drivers.
Signed-off-by: Greg Kroah-Hartman
25 Jun, 2006
1 commit
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Patch from Ben Dooks
Serial port support for the on-board UART blocks
on the Samsung S3C2412 and S3C2413 UARTs.Signed-off-by: Ben Dooks
Signed-off-by: Russell King
21 Jun, 2006
1 commit
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* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (42 commits)
[ARM] Fix tosa build error
[ARM] 3610/1: Make reboot work on Versatile
[ARM] 3609/1: S3C24XX: defconfig update for s3c2410_defconfig
[ARM] 3591/1: Anubis: IDE device definitions
[ARM] Include asm/hardware.h not asm/arch/hardware.h
[ARM] 3594/1: Poodle: Add touchscreen support + other updates
[ARM] 3564/1: sharpsl_pm: Abstract some machine specific parameters
[ARM] 3561/1: Poodle: Correct the MMC/SD power control
[ARM] 3593/1: Add reboot and shutdown handlers for Zaurus handhelds
[ARM] 3599/1: AT91RM9200 remove global variables
[ARM] 3607/1: AT91RM9200 misc fixes
[ARM] 3605/1: AT91RM9200 Power Management
[ARM] 3604/1: AT91RM9200 New boards
[ARM] 3603/1: AT91RM9200 remove old files
[ARM] 3592/1: AT91RM9200 Serial driver update
[ARM] 3590/1: AT91RM9200 Platform devices support
[ARM] 3589/1: AT91RM9200 DK/EK board update
[ARM] 3588/1: AT91RM9200 CSB337/637 board update
[ARM] 3587/1: AT91RM9200 hardware headers
[ARM] 3586/1: AT91RM9200 header update
...
20 Jun, 2006
1 commit
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Patch from Andrew Victor
This patch includes a number of updates to the AT91RM9200 serial driver.
Changes include:
1. Conversion to a platform_driver. [Ivan Kokshaysky]
2. Replaced all references to AT91RM9200 with AT91. This driver can now
also be used for the AT91SAM9216.
3. Allow TIOCM_LOOP to configure local loopback mode.
4. Cleaned up the 'read_status_mask' usage and interrupt handler code.
[Chip Coldwell]
5. Suspend/resume support. [David Brownell]There are a few 'unused variable' warning when compiling this - I
removed the new DMA support to keep this first patch simpler.Signed-off-by: Andrew Victor
Signed-off-by: Russell King
24 May, 2006
1 commit
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Conflicts:
include/asm-powerpc/unistd.h
include/asm-sparc/unistd.h
include/asm-sparc64/unistd.hSigned-off-by: David Woodhouse
30 Apr, 2006
1 commit
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The locking for the uart_port is over complicated, and can be
simplified if we introduce a flag to indicate that a port is "dead"
and will be removed.This also helps the validator because it removes a case of non-nested
unlock ordering.Signed-off-by: Russell King
Signed-off-by: Ingo Molnar
Signed-off-by: Andrew Morton
26 Apr, 2006
1 commit
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Signed-off-by: David Woodhouse
23 Mar, 2006
1 commit
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* master.kernel.org:/home/rmk/linux-2.6-serial:
[SERIAL] Merge avlab serial board entries in parport_serial
[SERIAL] kernel console should send CRLF not LFCR
21 Mar, 2006
1 commit
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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
20 Mar, 2006
1 commit
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Since it can do things like BREAK and HUP, we implement
this as a serial uart driver.This still needs interrupt probing code, as I haven't figured
out how interrupts will work or be probed for on SUN4V yet.Signed-off-by: David S. Miller
22 Jan, 2006
5 commits
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Same reasoning as commit 747c8a55946ed037bf7d62454c3c599c02af2262
but this time we're making uart_port flags a bitwise type - not
all of these flags correspond with the old ASYNC_ flags, so there
is the possibility for bugs if the wrong ASYNC_* constants are
used. Always use UPF_* constants for uart_port->flags.Signed-off-by: Russell King
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The previous change found a bug in the serial SAK handling - because
we were looking for UPF_SAK set in uart_info->flags, we would never
raise a SAK condition. UPF_SAK is in uart_port->flags.Signed-off-by: Russell King
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The potential for confusing the flags is fairly high. Make
uart_info's flags a bitwise type so sparse can check that the
right flag definitions are used with the right structure.Signed-off-by: Russell King
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No one should write to the port->ops structure, so make it constant.
Signed-off-by: Russell King
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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: Russell King
14 Jan, 2006
1 commit
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semaphore to mutex conversion.
the conversion was generated via scripts, and the result was validated
automatically via a script as well.build and boot tested.
Signed-off-by: Ingo Molnar
Signed-off-by: Russell King
11 Jan, 2006
1 commit
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Patch from Andrew Victor
This patch adds support to the 2.6 kernel series for the Atmel
AT91RM9200 processor.This patch is the Serial driver.
This version uses the newly re-written GPL'ed hardware headers.
Signed-off-by: Andrew Victor
Signed-off-by: Russell King
29 Nov, 2005
1 commit
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Patch from Sascha Hauer
This patch adds PORT_NETX for supporting the Hilscher netx embedded
UARTs.Signed-off-by: Sascha Hauer
Signed-off-by: Russell King
06 Nov, 2005
1 commit
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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: Pantelis Antoniou
Signed-off-by: Russell King
31 Oct, 2005
1 commit
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The PORT_* macros must be uniquely numbered. This fixes the
definitions.Signed-off-by: Russell King
30 Oct, 2005
1 commit
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Signed-off-by: Ralf Baechle
