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Merged in david_s5/nuttx/master_kinetis_sdhc_dma (pull request #692)

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kinetis:sdhc fix SDIO driver so that DMA works

There were 2 problems. The first was that the interrupt did
   test DINT and raise a completion events. But since DINT is
   just an indication of DMA completion, TC is a valid way to
   determine that the transfer is complete.

   The second problem is that Software Reset For DAT Line
   SDHC_SYSCTL[RSTD] clears the bits 24-0 in SDHC_PROTO
   this looses the wide bus setting DTW

Approved-by: GregoryN <gnutt@nuttx.org>
This commit is contained in:
David Sidrane 2018-07-23 19:41:23 +00:00 committed by GregoryN
parent 524602fb51
commit 82fc9986bf
1 changed files with 12 additions and 3 deletions
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15
arch/arm/src/kinetis/kinetis_sdhc.c
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@ -152,8 +152,10 @@
#define SDHC_SNDDONE_INTS (SCHC_XFRERR_INTS|SDHC_INT_BWR|SDHC_INT_TC)
#define SDHC_XFRDONE_INTS (SCHC_XFRERR_INTS|SDHC_INT_BRR|SDHC_INT_BWR|SDHC_INT_TC)
#define SCHC_DMAERR_INTS (SDHC_INT_DCE|SDHC_INT_DTOE|SDHC_INT_DEBE|SDHC_INT_DMAE)
#define SDHC_DMADONE_INTS (SCHC_DMAERR_INTS|SDHC_INT_DINT)
/* For DMA operations DINT is not interesting TC will indicate completions */
#define SCHC_DMAERR_INTS (SCHC_XFRERR_INTS|SDHC_INT_DMAE)
#define SDHC_DMADONE_INTS (SCHC_DMAERR_INTS|SDHC_INT_TC)
#define SDHC_WAITALL_INTS (SDHC_RESPDONE_INTS|SDHC_XFRDONE_INTS|SDHC_DMADONE_INTS)
@ -731,6 +733,7 @@ static void kinetis_dataconfig(struct kinetis_dev_s *priv, bool bwrite,
putreg32(watermark << SDHC_WML_RD_SHIFT, KINETIS_SDHC_WML);
}
}
/****************************************************************************
@ -1026,6 +1029,7 @@ static void kinetis_endtransfer(struct kinetis_dev_s *priv, sdio_eventset_t wkup
{
#ifdef CONFIG_KINETIS_SDHC_DMA
uint32_t regval;
uint32_t proctl;
#endif
/* Disable all transfer related interrupts */
@ -1039,11 +1043,16 @@ static void kinetis_endtransfer(struct kinetis_dev_s *priv, sdio_eventset_t wkup
/* If this was a DMA transfer, make sure that DMA is stopped */
#ifdef CONFIG_KINETIS_SDHC_DMA
/* Stop the DMA by resetting the data path */
/* Stop the DMA by resetting the data path but first save the
* state of the SDHC_PROCTL as it will be reset (in bits 24-0)
* and we will loose the DTW (4bit mode) setting
*/
proctl = getreg32(KINETIS_SDHC_PROCTL);
regval = getreg32(KINETIS_SDHC_SYSCTL);
regval |= SDHC_SYSCTL_RSTD;
putreg32(regval, KINETIS_SDHC_SYSCTL);
putreg32(proctl, KINETIS_SDHC_PROCTL);
#endif
/* Mark the transfer finished */