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authorPierre Ossman <drzeus-list@drzeus.cx>2005-09-06 15:18:50 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-07 16:57:50 -0700
commit335eadf2ef6a1122a720aea98e758e5d431da87d (patch)
treeb20a0c21736cfca40a9df7ab2834b65079469992 /include/linux/mmc/mmc.h
parent328b9227865026268261a24a97a578907b280415 (diff)
downloadop-kernel-dev-335eadf2ef6a1122a720aea98e758e5d431da87d.zip
op-kernel-dev-335eadf2ef6a1122a720aea98e758e5d431da87d.tar.gz
[PATCH] sd: initialize SD cards
Support for the Secure Digital protocol in the MMC layer. A summary of the legal issues surrounding SD cards, as understood by yours truly: Members of the Secure Digital Association, hereafter SDA, are required to sign a NDA[1] before given access to any specifications. It has been speculated that including an SD implementation would forbid these members to redistribute Linux. This is the basic problem with SD support so it is unclear if it even is a problem since it has no effect on those of us that aren't members. The SDA doesn't seem to enforce these rules though since the patches included here are based on documentation made public by some of the members. The most complete specs[2] are actually released by Sandisk, one of the founding companies of the SDA. Because of this the NDA is considered a non-issue by most involved in the discussions concerning these patches. It might be that the SDA is only interested in protecting the so called "secure" bits of SD, which so far hasn't been found in any public spec. (The card is split into two sections, one "normal" and one "secure" which has an access scheme similar to TPM:s). (As a side note, Microsoft is working to make things easier for us since they want to be able to include the source code for a SD driver in one of their development kits. HP is making sure that the new NDA will allow a Linux implementation. So far only the SDIO specs have been opened up[3]. More will hopefully follow.) [1] http://www.sdcard.org/membership/images/ippolicy.pdf [2] http://www.sandisk.com/pdf/oem/ProdManualSDCardv1.9.pdf [3] http://www.sdcard.org/sdio/Simplified%20SDIO%20Card%20Specification.pdf This patch contains the central parts of the SD support. If no MMC cards are found on a bus then the MMC layer proceeds looking for SD cards. Helper functions are extended to handle the special needs of SD cards. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx> Cc: Russell King <rmk@arm.linux.org.uk> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/mmc/mmc.h')
-rw-r--r--include/linux/mmc/mmc.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 0d35d4f..1ab78e8 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -88,6 +88,8 @@ struct mmc_card;
extern int mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
+extern int mmc_wait_for_app_cmd(struct mmc_host *, unsigned int,
+ struct mmc_command *, int);
extern int __mmc_claim_host(struct mmc_host *host, struct mmc_card *card);
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