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-rw-r--r--drivers/mmc/core/sdio_bus.c9
-rw-r--r--drivers/mmc/core/sdio_cis.c2
-rw-r--r--drivers/mmc/core/sdio_io.c49
3 files changed, 59 insertions, 1 deletions
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index d229020db4a..fcb13fb0daa 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -128,11 +128,20 @@ static int sdio_bus_probe(struct device *dev)
struct sdio_driver *drv = to_sdio_driver(dev->driver);
struct sdio_func *func = dev_to_sdio_func(dev);
const struct sdio_device_id *id;
+ int ret;
id = sdio_match_device(func, drv);
if (!id)
return -ENODEV;
+ /* Set the default block size so the driver is sure it's something
+ * sensible. */
+ sdio_claim_host(func);
+ ret = sdio_set_block_size(func, 0);
+ sdio_release_host(func);
+ if (ret)
+ return ret;
+
return drv->probe(func, id);
}
diff --git a/drivers/mmc/core/sdio_cis.c b/drivers/mmc/core/sdio_cis.c
index d050c40cf04..1d03f12bbb3 100644
--- a/drivers/mmc/core/sdio_cis.c
+++ b/drivers/mmc/core/sdio_cis.c
@@ -79,7 +79,7 @@ static int cistpl_funce_func(struct sdio_func *func,
return -EINVAL;
/* TPLFE_MAX_BLK_SIZE */
- func->blksize = buf[12] | (buf[13] << 8);
+ func->max_blksize = buf[12] | (buf[13] << 8);
return 0;
}
diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
index ecdb77242e9..c2bad1195e3 100644
--- a/drivers/mmc/core/sdio_io.c
+++ b/drivers/mmc/core/sdio_io.c
@@ -141,6 +141,55 @@ err:
EXPORT_SYMBOL_GPL(sdio_disable_func);
/**
+ * sdio_set_block_size - set the block size of an SDIO function
+ * @func: SDIO function to change
+ * @blksz: new block size or 0 to use the default.
+ *
+ * The default block size is the largest supported by both the function
+ * and the host, with a maximum of 512 to ensure that arbitrarily sized
+ * data transfer use the optimal (least) number of commands.
+ *
+ * A driver may call this to override the default block size set by the
+ * core. This can be used to set a block size greater than the maximum
+ * that reported by the card; it is the driver's responsibility to ensure
+ * it uses a value that the card supports.
+ *
+ * Returns 0 on success, -EINVAL if the host does not support the
+ * requested block size, or -EIO (etc.) if one of the resultant FBR block
+ * size register writes failed.
+ *
+ */
+int sdio_set_block_size(struct sdio_func *func, unsigned blksz)
+{
+ int ret;
+
+ if (blksz > func->card->host->max_blk_size)
+ return -EINVAL;
+
+ if (blksz == 0) {
+ blksz = min(min(
+ func->max_blksize,
+ func->card->host->max_blk_size),
+ 512u);
+ }
+
+ ret = mmc_io_rw_direct(func->card, 1, 0,
+ SDIO_FBR_BASE(func->num) + SDIO_FBR_BLKSIZE,
+ blksz & 0xff, NULL);
+ if (ret)
+ return ret;
+ ret = mmc_io_rw_direct(func->card, 1, 0,
+ SDIO_FBR_BASE(func->num) + SDIO_FBR_BLKSIZE + 1,
+ (blksz >> 8) & 0xff, NULL);
+ if (ret)
+ return ret;
+ func->cur_blksize = blksz;
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(sdio_set_block_size);
+
+/**
* sdio_readb - read a single byte from a SDIO function
* @func: SDIO function to access
* @addr: address to read