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SAMA5D3 HSMCI: TX DMA is again disabled

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This commit is contained in:
Gregory Nutt 2014-08-05 07:07:39 -06:00
parent 73db3d052f
commit 7b9c44101d
3 changed files with 16 additions and 14 deletions
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8
arch/arm/src/sama5/sam_hsmci.c
View File

@ -181,11 +181,17 @@
# endif
#endif
/* These were once helpful. Perhaps they will be so again some time. */
/* There is some unresolved issue with the SAMA5D3 DMA. TX DMA is currently
* disabled.
*/
#undef HSCMI_NORXDMA /* Define to disable RX DMA */
#undef HSCMI_NOTXDMA /* Define to disable TX DMA */
#ifdef ATSAMA5D3
# define HSCMI_NOTXDMA 1 /* Disabled */
#endif
/* Timing */
#define HSMCI_CMDTIMEOUT (100000)

10
configs/sama5d3-xplained/README.txt
View File

@ -2824,12 +2824,10 @@ To-Do List
low priority to me but might be important to you if you are need very
high performance SD card accesses.
The last time I used HSMCI with a SAMA5D3, I had to disable TX DMA
in the HSMCI driver. Much has changed since then and I have reverified
that TX DMA transfers are functional using a SAMA5D4. The SAMA5D4,
however, has a different DMA subsystem. So... if you suspect issues
HSMCI writes, you might try disabling the TX DMA again in the
sam_hsmci.c driver.
HCMDI TX DMA is currently disabled for the SAMA5D3. There is some
issue with the TX DMA setup (HSMCI TX DMA the same driver works with
the SAMA5D4 which has a different DMA subsystem). This is a bug that
needs to be resolved.
3) GMAC has only been tested on a 10/100Base-T network. I don't have a
1000Base-T network to support additional testing.

12
configs/sama5d3x-ek/README.txt
View File

@ -3247,7 +3247,7 @@ Configurations
card slots: (1) a full size SD card slot (J7 labelled MCI0), and (2)
a microSD memory card slot (J6 labelled MCI1). The full size SD card
slot connects via HSMCI0; the microSD connects vi HSMCI1. Relevant
configuration settings can be found in the section entitle "HSMCI
configuration settings can be found in the section entitled "HSMCI
Card Slots" above.
9. Support the USB high-speed device (UDPHS) driver is enabled. See the
@ -3651,12 +3651,10 @@ To-Do List
low priority to me but might be important to you if you are need very
high performance SD card accesses.
The last time I used HSMCI with a SAMA5D3, I had to disable TX DMA
in the HSMCI driver. Much has changed since then and I have reverified
that TX DMA transfers are functional using a SAMA5D4. The SAMA5D4,
however, has a different DMA subsystem. So... if you suspect issues
HSMCI writes, you might try disabling the TX DMA again in the
sam_hsmci.c driver.
HCMDI TX DMA is currently disabled for the SAMA5D3. There is some
issue with the TX DMA setup (HSMCI TX DMA the same driver works with
the SAMA5D4 which has a different DMA subsystem). This is a bug that
needs to be resolved.
4) I believe that there is an issue when the internal AT25 FLASH is
formatted by NuttX. That format works fine with Linux, but does not