linux-toradex.git/drivers/serial, branch v2.6.25-rc2

serial: sh-sci: Fix up SH-5 build.

2008-02-14T05:22:12+00:00

asm/hardware.h doesn't exist any more, and the definitions sh-sci.h
depended on are provided through asm/cpu/addrspace.h these days.
Kill off the bogus include.

Signed-off-by: Paul Mundt

sh: add support for sh7366 processor

2008-02-14T05:22:10+00:00

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 
Signed-off-by: Paul Mundt

fs/char_dev.c: chrdev_open marked static and removed from fs.h

2008-02-08T17:22:42+00:00

There is an outdated comment in serial_core.c also fixed.

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

atmel_serial: show tty name in /proc/interrupts

2008-02-08T17:22:37+00:00

When possible, pass the tty name to request_irq() so that the user can easily
distinguish the different serial ports in /proc/interrupts.

Signed-off-by: Haavard Skinnemoen 
Cc: Andrew Victor 
Tested-by: Marc Pignat 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

atmel_serial: use container_of instead of direct cast

2008-02-08T17:22:37+00:00

As pointed out by David Brownell, we really ought to be using container_of
when converting from "struct uart_port *" to "struct atmel_uart_port *".

Signed-off-by: Haavard Skinnemoen 
Cc: Andrew Victor 
Tested-by: Marc Pignat 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

atmel_serial: fix broken RX buffer allocation

2008-02-08T17:22:37+00:00

Introduced by atmel_serial-split-the-interrupt-handler.patch.

Thanks to michael  for spotting it.

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

atmel_serial: add DMA support

2008-02-08T17:22:37+00:00

This patch is based on the DMA-patch by Chip Coldwell for the AT91/AT32 serial
USARTS, with some tweaks to make it apply neatly on top of the other patches
in this series.

The RX and TX code has been moved to a tasklet and reworked a bit.  Instead of
depending on the ENDRX and TIMEOUT bits in CSR, we simply grab as much data as
we can from the DMA buffers.  I think this closes a race where the ENDRX bit
is set after we read CSR but before we read RPR, although I haven't confirmed
this.

Similarly, the two TX handlers (ENDTX and TXBUFE) have been combined into one.
 Since the current code only uses a single TX buffer, there's no point in
handling those interrupts separately.

This also fixes a DMA sync bug in the original patch.

[linux@bohmer.net: rebased onto irq-splitup patch]
[hskinnemoen@atmel.com: moved to tasklet, fixed dma bug, misc cleanups]
[hskinnemoen@atmel.com: atmel_serial dma: Misc fixes and cleanups]
Signed-off-by: Remy Bohmer 
Signed-off-by: Haavard Skinnemoen 
Cc: Andrew Victor 
Tested-by: Marc Pignat 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

atmel_serial: split the interrupt handler

2008-02-08T17:22:37+00:00

Split up the interrupt handler of the serial port into a interrupt top-half
and a tasklet.

The goal is to get the interrupt top-half as short as possible to minimize
latencies on interrupts.  But the old code also does some calls in the
interrupt handler that are not allowed on preempt-RT in IRQF_NODELAY context.
This handler is executed in this context because of the interrupt sharing with
the timer interrupt.  The timer interrupt on Preempt-RT runs in IRQF_NODELAY
context.

The tasklet takes care of handling control status changes, pushing incoming
characters to the tty layer, handling break and other errors.  It also handles
pushing TX data into the data register.

Reading the complete receive queue is still done in the top-half because we
never want to miss any incoming character.

[hskinnemoen@atmel.com: misc cleanups and simplifications]
Signed-off-by: Remy Bohmer 
Signed-off-by: Haavard Skinnemoen 
Cc: Andrew Victor 
Tested-by: Marc Pignat 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

atmel_serial: fix bugs in probe() error path and remove()

2008-02-08T17:22:37+00:00

When an error happens in probe(), the clocks should be disabled, but
only if the port isn't already used as a console.

In remove(), the port struct shouldn't be freed because it's defined
statically.

Signed-off-by: Haavard Skinnemoen 
Cc: Andrew Victor 
Tested-by: Marc Pignat 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

atmel_serial: use existing console options only if BRG is running

2008-02-08T17:22:37+00:00

If BRGR is zero, the baud rate generator isn't running, so the boot loader
can't have initialized the port.

Signed-off-by: Haavard Skinnemoen 
Acked-by: Andrew Victor 
Tested-by: Marc Pignat 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds