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mmc: sdhci: Define maximum segments

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Define the maximum number of segments instead of
having the constant 128 appearing in the code in
various places.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2014-11-04 12:42:43 +02:00 committed by Ulf Hansson
parent 76fe379aca
commit 4fb213f81f
2 changed files with 10 additions and 4 deletions
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8
drivers/mmc/host/sdhci.c
View File

@ -2877,8 +2877,8 @@ int sdhci_add_host(struct sdhci_host *host)
* descriptor for each segment, plus 1 for a nop end descriptor,
* all multipled by the descriptor size.
*/
host->adma_table_sz = (128 * 2 + 1) * 8;
host->align_buffer_sz = 128 * 4;
host->adma_table_sz = (SDHCI_MAX_SEGS * 2 + 1) * 8;
host->align_buffer_sz = SDHCI_MAX_SEGS * 4;
host->desc_sz = 8;
host->align_sz = 4;
host->align_mask = 3;
@ -3192,11 +3192,11 @@ int sdhci_add_host(struct sdhci_host *host)
* can do scatter/gather or not.
*/
if (host->flags & SDHCI_USE_ADMA)
mmc->max_segs = 128;
mmc->max_segs = SDHCI_MAX_SEGS;
else if (host->flags & SDHCI_USE_SDMA)
mmc->max_segs = 1;
else /* PIO */
mmc->max_segs = 128;
mmc->max_segs = SDHCI_MAX_SEGS;
/*
* Maximum number of sectors in one transfer. Limited by DMA boundary

6
drivers/mmc/host/sdhci.h
View File

@ -266,6 +266,12 @@
#define SDHCI_DEFAULT_BOUNDARY_SIZE (512 * 1024)
#define SDHCI_DEFAULT_BOUNDARY_ARG (ilog2(SDHCI_DEFAULT_BOUNDARY_SIZE) - 12)
/*
* Maximum segments assuming a 512KiB maximum requisition size and a minimum
* 4KiB page size.
*/
#define SDHCI_MAX_SEGS 128
struct sdhci_ops {
#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
u32 (*read_l)(struct sdhci_host *host, int reg);