Commit 4f3d3e9b authored May 25, 2011 by Andrei Warkentin Committed by Chris Ball May 25, 2011

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>

parent 8edf6371

drivers/mmc/host/sdhci.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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 {