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SAMA5 HSMCI: e-enable TX DMA and verify that DMA writes to the SD card are functional. They are so now TX DMA is re-enabled in the driver. This might affect the SAMA5D3 platforms where the TX DMA problem was found. The SAMA4D3 and 4 use the same HSMCI driver. Much has change since then and it is not surprising that DMA is now functional. However, the has not be re-verified on the SAMA5D3 which has a different DMA controller.

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This commit is contained in:
Gregory Nutt 2014-07-30 11:20:06 -06:00
parent 611ea42dbf
commit c0c4cda763
1 changed files with 3 additions and 5 deletions
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8
arch/arm/src/sama5/sam_hsmci.c
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@ -181,12 +181,10 @@
# endif
#endif
/* TX-DMA is not reliable. Often, the TX DMA will hang after transferring 64 bytes or so.
* I don't have any clue why at the moment. This option suppresses TX DMA (only).
*/
/* These were once helpful. Perhaps they will be so again some time. */
#undef HSCMI_NORXDMA
#define HSCMI_NOTXDMA 1
#undef HSCMI_NORXDMA /* Define to disable RX DMA */
#undef HSCMI_NOTXDMA /* Define to disable TX DMA */
/* Timing */