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authorDavid Vrabel <david.vrabel@csr.com>2010-09-09 16:37:24 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-09-09 18:57:22 -0700
commitf3c65b2870f2481f3646bc410a58a12989ecc704 (patch)
treeef33d62ee503a43645aae49119a94dc0339fe4b0 /include
parent152831be91dfe864e06c3b3ff2bf994e04df4cdf (diff)
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mmc: avoid getting CID on SDIO-only cards
The introduction of support for SD combo cards breaks the initialization of all CSR SDIO chips. The GO_IDLE (CMD0) in mmc_sd_get_cid() causes CSR chips to be reset (this is non-standard behavior). When initializing an SDIO card check for a combo card by using the memory present bit in the R4 response to IO_SEND_OP_COND (CMD5). This avoids the call to mmc_sd_get_cid() on an SDIO-only card. Signed-off-by: David Vrabel <david.vrabel@csr.com> Acked-by: Michal Mirolaw <mirq-linux@rere.qmqm.pl> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mmc/sdio.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/mmc/sdio.h b/include/linux/mmc/sdio.h
index 329a8faa6e3..245cdacee54 100644
--- a/include/linux/mmc/sdio.h
+++ b/include/linux/mmc/sdio.h
@@ -38,6 +38,8 @@
* [8:0] Byte/block count
*/
+#define R4_MEMORY_PRESENT (1 << 27)
+
/*
SDIO status in R5
Type