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mmc: sdhci: Auto-CMD23 fixes. 

Fixes bugs in Auto-CMD23 feature enable decision. Auto-CMD23
should be enabled if host is >= v3, and SDMA is not in use.

USE_ADMA | USE_SDMA | Auto-CMD23
---------+----------+-----------
    0    |    0     |     1
---------+----------+-----------
    0    |    1     |     0
---------+----------+-----------
    1    |    0     |     1
---------+----------+-----------
    1    |    1     |     1

Signed-off-by: Andrei Warkentin <andreiw@motorola.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Andrei Warkentin 2011-05-25 10:42:50 -04:00 committed by Chris Ball
parent 8edf63710b
commit 4f3d3e9b50
1 changed files with 2 additions and 2 deletions
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4
drivers/mmc/host/sdhci.c
View File

@ -2494,9 +2494,9 @@ int sdhci_add_host(struct sdhci_host *host)
host->flags |= SDHCI_AUTO_CMD12;
/* Auto-CMD23 stuff only works in ADMA or PIO. */
if ((host->version == SDHCI_SPEC_300) &&
if ((host->version >= SDHCI_SPEC_300) &&
((host->flags & SDHCI_USE_ADMA) ||
!(host->flags & SDHCI_REQ_USE_DMA))) {
!(host->flags & SDHCI_USE_SDMA))) {
host->flags |= SDHCI_AUTO_CMD23;
DBG("%s: Auto-CMD23 available\n", mmc_hostname(mmc));
} else {