Commit Graph

70 Commits

Author SHA1 Message Date
Mike Frysinger 0bcfd70ea1 [Blackfin] serial driver: fix bug - cache the bits of the LSR on systems where the LSR is read-to-clear
Cache the bits of the LSR on systems where the LSR is read-to-clear
so that we can safely read the LSR in random places.  this fixes
older parts where break/framing/parity/overflow was not being detected
at all in PIO mode, and this fixes newer parts where
break/framing/parity/overflow was being reported all the time
without being cleared.

Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-12-24 19:40:05 +08:00
Sonic Zhang 4c195ad88b [Blackfin] serial driver: fix bug - should not wait for the TFI bit, just clear it when tx stop.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-12-23 23:18:08 +08:00
Sonic Zhang 99ee7b5f3a [Blackfin] serial driver: Fix bug serial driver in DMA mode spams history to console on shell restart
http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=2920
Fix by increasing buffer tail immediately before starting tx dma.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-12-21 17:12:55 +08:00
Sonic Zhang 75b780bd99 [Blackfin] serial driver: Fix bug Free rx dma buffer in shutdown.
Kernel crash for the serial driver in DMA mode:
http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=3679

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-12-21 17:03:39 +08:00
Sonic Zhang 1b73351c6a [Blackfin] serial driver: Clean up UART DMA code.
Start next TX DMA in tx dma handler instead of rx timer handler.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-12-21 16:45:12 +08:00
Sonic Zhang 759eb04090 Blackfin Serial driver: Fix bug - serial driver in PIO mode cant handle input very quickly
Output as many bytes as possible in PIO tx handler.
This reduce the number of tx interrupts and shorten the delay to handle
rx interrupt. So, rx overrun disappears.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-21 17:00:32 +08:00
Michael Hennerich 2047e40d72 [Blackfin] arch: set_bfin_dma_config shouldnt set SYNC or RESTART by default - add argument or option
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2008-01-22 15:29:18 +08:00
Mike Frysinger bbf275f092 Blackfin serial driver: pending a unique anomaly id, tie the break flood issue to ANOMALY_05000230
pending a unique anomaly id, tie the break flood issue to ANOMALY_05000230
as when that was fixed, the fallout also fixed the break flood

Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-08-05 16:48:08 +08:00
Sonic Zhang a359cca71e Blackfin arch: update kgdb patch
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-10-10 16:47:58 +08:00
Robin Getz 0ae53640b5 Blackfin arch: Initial patch to add earlyprintk support
This allows debugging of problems which happen eary in the kernel
boot process (after bootargs are parsed, but before serial subsystem
is fully initialized)

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-10-09 17:24:49 +08:00
Mike Frysinger d5148ffa60 Blackfin arch: use the [CS]SYNC() macros which include anomaly workarounds rather than __builtin_bfin_[cs]sync()
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-07-25 11:57:42 +08:00
Roy Huang f4d640c9be Blackfin serial driver: supporting BF548-EZKIT serial port
Signed-off-by: Roy Huang <roy.huang@analog.com>
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-07-12 16:43:46 +08:00
Sonic Zhang 474f1a667d Blackfin arch: kgdb specific code
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-06-29 16:35:17 +08:00
Mike Frysinger 19aa6382e3 Blackfin serial driver: decouple PARODD and CMSPAR checking from PARENB
as the termios info does not stipulate that the former are dependent on the latter

Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-06-11 16:16:45 +08:00
Mike Frysinger cf68676222 Blackfin serial driver: actually implement the break_ctl() function
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-06-11 16:12:49 +08:00
Mike Frysinger 9808901b6c Blackfin serial driver: ignore framing and parity errors
if we get a break signal, we want to ignore framing and parity errors
because those will always be set (by nature of the signal)

Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-06-11 15:31:30 +08:00
Mike Frysinger c16c3ca79a Blackfin serial driver: hook up our UARTs STP bit with userspaces CMSPAR
so we can now do spaced/marked parity

Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-06-11 15:31:30 +08:00
Mike Frysinger 2ac5ee4738 Blackfin serial driver: implement support for ignoring parity/break errors
properly setting up and respecting the read_status_mask / ignore_status_mask fields of the serial core

Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-21 09:50:23 -07:00
Aubrey Li 5c4e472b0a Blackfin serial driver: fix overhead issue
Signed-off-by: Aubrey Li <aubrey.li@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-21 09:50:23 -07:00
Bryan Wu 194de56127 blackfin: serial driver
This patch implements the driver necessary use the Analog Devices Blackfin
processor's Serial Port.

Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Russell King <rmk+lkml@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-07 12:12:58 -07:00