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| author | Ben Dooks <ben-linux@fluff.org> | 2008-06-30 22:40:39 +0100 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2008-07-15 14:14:48 +0200 |
| commit | 7e9c7b64022b7faff6022df64baec8ab467d0bfd (patch) | |
| tree | 53cfd0f7efbdafcb897ab8fde122c6aef1862a73 /drivers/mmc/host/s3cmci.c | |
| parent | 4dde7f755211fd58105c989a99a3a9f2f1238fba (diff) | |
| download | talos-obmc-linux-7e9c7b64022b7faff6022df64baec8ab467d0bfd.tar.gz talos-obmc-linux-7e9c7b64022b7faff6022df64baec8ab467d0bfd.zip | |
MMC: S3C24XX: Refuse incorrectly aligned transfers
The hardware does not support any multi-block transfers
with an block-size that is not 32bit aligned. Also the driver
itself does not support single block non-32bit transfers
either.
Ensure that the s3cmci_setup_data() returns the appropriate
error if we encounter this.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/host/s3cmci.c')
| -rw-r--r-- | drivers/mmc/host/s3cmci.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c index 2b4839536975..6a1e4994b724 100644 --- a/drivers/mmc/host/s3cmci.c +++ b/drivers/mmc/host/s3cmci.c @@ -807,6 +807,17 @@ static int s3cmci_setup_data(struct s3cmci_host *host, struct mmc_data *data) return 0; } + if ((data->blksz & 3) != 0) { + /* We cannot deal with unaligned blocks with more than + * one block being transfered. */ + + if (data->blocks > 1) + return -EINVAL; + + /* No support yet for non-word block transfers. */ + return -EINVAL; + } + while (readl(host->base + S3C2410_SDIDSTA) & (S3C2410_SDIDSTA_TXDATAON | S3C2410_SDIDSTA_RXDATAON)) { |
