Commit Graph

166 Commits

Author SHA1 Message Date
Linus Walleij 508849ade2 DMAENGINE: ste_dma40: allocate LCLA dynamically
Switch to allocating LCLA in memory instead of having a fixed
address.

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-06-22 18:01:55 -07:00
Jonas Aaberg 1d392a7ba4 DMAENGINE: ste_dma40: no premature stop
Correct bug that could cause paused channels to stop.

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-06-22 18:01:55 -07:00
Jonas Aaberg 2123a61e17 DMAENGINE: ste_dma40: interrupts only on dst
We don't want interrupts when the source is done, only when
the destination is done and everything is complete at the
recieveing end of a transfer.

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-06-22 18:01:55 -07:00
Jonas Aaberg 0c32269d81 DMAENGINE: ste_dma40: avoid doing unnessecary suspend
Avoid doing unnessecary suspend when modifying logical channels.

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-06-22 18:01:54 -07:00
Jonas Aaberg 2292b880e4 DMAENGINE: ste_dma40: lock fix
Fix up some locking issues found by enabling lock debugging.

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-06-22 18:01:54 -07:00
Jonas Aaberg 0d0f6b8bbb DMAENGINE: ste_dma40: deny ops on non-alloc channels
Added checks to deny operating on none-allocated channels.

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-06-22 18:01:54 -07:00
Jonas Aaberg 2a6143407d DMAENGINE: ste_dma40: various cosmetic clean-ups
This cleans up some extra newlines, removes some code duplication
and moves the code to comply better with checkpatch.

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-06-22 18:01:54 -07:00
Jonas Aaberg ff0b12baa5 DMAENGINE: ste_dma40: improve allocation error handling
Better error handling when channel allocation fails.

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-06-22 18:01:54 -07:00
Jonas Aaberg c675b1b424 DMAENGINE: ste_dma40: use kmem cache
Use kmem cache instead of own cache, reducing code duplication
and bug sources.

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-06-22 18:01:53 -07:00
Per Friden a8be8627a3 DMAENGINE: ste_dma40: moved freeing of client owned desc
fixed typo and moved freeing of client owned desc to free_dma.

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-06-22 18:01:53 -07:00
Linus Walleij ef1872ec65 DMAENGINE: ste_dma40: only write phy channel config first time
We only need to write the configuration to a physical channel if
it is free, else it is already written.

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-06-22 18:01:53 -07:00
Per Friden 941b77a3b6 DMAENGINE: ste_dma40: fixed lli_max=1 issue
Fixed lli_max=1 issue in case of full lcla, currently this case
is not properly handled.

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-06-22 18:01:53 -07:00
Linus Walleij 058276303d DMAENGINE: extend the control command to include an arg
This adds an argument to the DMAengine control function, so that
we can later provide control commands that need some external data
passed in through an argument akin to the ioctl() operation
prototype.

[dan.j.williams@intel.com: fix up some missed conversions]
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-05-17 16:30:42 -07:00
Marcin Mielczarczyk 4aed79b281 DMAENGINE: DMA40 fix for allocation of logical channel 0
Fix for allocation failure of logical channel when event line
happens to be number 0.

Signed-off-by: Marcin Mielczarczyk <marcin.mielczarczyk@tieto.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-05-17 15:45:06 -07:00
Jonas Aaberg a5ebca4769 DMAENGINE: DMA40 support paused channel status
Support determining whether a channel is paused or
not using the status function.

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-05-17 15:45:03 -07:00
Linus Walleij 8d318a50b3 DMAENGINE: Support for ST-Ericssons DMA40 block v3
This is a straightforward driver for the ST-Ericsson DMA40 DMA
controller found in U8500, implemented akin to the existing
COH 901 318 driver.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Srinidh Kasagar <srinidhi.kasagar@stericsson.com>
Cc: STEricsson_nomadik_linux@list.st.com
Cc: Alessandro Rubini <rubini@unipv.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2010-04-14 14:49:20 -07:00