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7 commits

Author SHA1 Message Date
Jack Halpin
f5b59cdf5e AMS Sansa: dma-pl081.c: dma_enable_channel() Add step to clear pending interrupts from the previous operation. Add comments and make construction 
of the CH_CONTROL and CH_CONFIGURATION registers easier to follow.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23725 a1c6a512-1295-4272-9138-f99709370657
 2009-11-23 19:44:13 +00:00
Bertrik Sikken
6b63f23648 Patch by Rafaël Carré - Sansa AMS: Fix a few mistakes in DMA code 
DMAC_INT_TC_CLEAR is a write-only reg
HIGH bits of DMAC_SYNC mean synchronisation logic disabled.
Also, according to the OF and to tests, all the peripherals we use run at the same frequency (PCLK?).



git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20643 a1c6a512-1295-4272-9138-f99709370657
 2009-04-07 17:08:26 +00:00
Rafaël Carré
c7e83bd017 Sansa AMS : use SD controller status to notify end of data transfer 
Retry blocks transfer if a problem happened
Remove unneeded blocking API from DMA code

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19714 a1c6a512-1295-4272-9138-f99709370657
 2009-01-08 08:27:42 +00:00
Rafaël Carré
e97191faa7 Sansa AMS: Disable DMA clocks when not in use 
Add dma_retain() and dma_release() to reference count the users

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19344 a1c6a512-1295-4272-9138-f99709370657
 2008-12-04 22:54:06 +00:00
Rafaël Carré
1ab08e6879 Sansa AMS: updates DMA API 
* Adds a callback to be called on end of transfer
* Add a function to disable a channel
* Services the 2 channels if both are active in the isr

SD driver: panics on error

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19333 a1c6a512-1295-4272-9138-f99709370657
 2008-12-04 20:48:19 +00:00
Rafaël Carré
a39e4e9962 Sansa AMS: use non-busy wakeup to signal end of DMA transfer 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19233 a1c6a512-1295-4272-9138-f99709370657
 2008-11-26 16:02:00 +00:00
Rafaël Carré
c1f90b1881 Sansa AMS: Use DMA for SD transfers (read and write) 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19211 a1c6a512-1295-4272-9138-f99709370657
 2008-11-25 13:38:32 +00:00