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| author | Pierre Ossman <drzeus@drzeus.cx> | 2008-06-28 12:52:45 +0200 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2008-07-15 14:14:44 +0200 |
| commit | ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15 (patch) | |
| tree | 05ca55c5ab38b814bf8d71c0720e5dfaf1419e32 /include/linux/mmc | |
| parent | e2d2647702702ea08cb78cdc9eca8c24242aa9be (diff) | |
| download | lwn-ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15.tar.gz lwn-ad3868b2ec96ec14a1549c9e33f5f9a2a3c6ab15.zip | |
mmc,sdio: helper function for transfer padding
There are a lot of crappy controllers out there that cannot handle
all the request sizes that the MMC/SD/SDIO specifications require.
In case the card driver can pad the data to overcome the problems,
this commit adds a helper that calculates how much that padding
should be.
A corresponding helper is also added for SDIO, but it can also deal
with all the complexities of splitting up a large transfer efficiently.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'include/linux/mmc')
| -rw-r--r-- | include/linux/mmc/core.h | 1 | ||||
| -rw-r--r-- | include/linux/mmc/sdio_func.h | 4 |
2 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h index d0c3abed74c2..143cebf0586f 100644 --- a/include/linux/mmc/core.h +++ b/include/linux/mmc/core.h @@ -135,6 +135,7 @@ extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *, struct mmc_command *, int); extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *); +extern unsigned int mmc_align_data_size(struct mmc_card *, unsigned int); extern int __mmc_claim_host(struct mmc_host *host, atomic_t *abort); extern void mmc_release_host(struct mmc_host *host); diff --git a/include/linux/mmc/sdio_func.h b/include/linux/mmc/sdio_func.h index b050f4d7b41f..f57f22b3be88 100644 --- a/include/linux/mmc/sdio_func.h +++ b/include/linux/mmc/sdio_func.h @@ -1,7 +1,7 @@ /* * include/linux/mmc/sdio_func.h * - * Copyright 2007 Pierre Ossman + * Copyright 2007-2008 Pierre Ossman * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -120,6 +120,8 @@ extern int sdio_set_block_size(struct sdio_func *func, unsigned blksz); extern int sdio_claim_irq(struct sdio_func *func, sdio_irq_handler_t *handler); extern int sdio_release_irq(struct sdio_func *func); +extern unsigned int sdio_align_size(struct sdio_func *func, unsigned int sz); + extern unsigned char sdio_readb(struct sdio_func *func, unsigned int addr, int *err_ret); extern unsigned short sdio_readw(struct sdio_func *func, |