sdio: basic parsing of FBR

[pandora-kernel.git] / drivers / mmc / core / sdio.c

diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index 7ce3e31..be62385 100644 (file)
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -23,8 +23,34 @@
 #include "sd_ops.h"
 #include "sdio_ops.h"
 
+static int sdio_read_fbr(struct sdio_func *func)
+{
+       int ret;
+       unsigned char data;
+
+       ret = mmc_io_rw_direct(func->card, 0, 0,
+               func->num * 0x100 + SDIO_FBR_STD_IF, 0, &data);
+       if (ret)
+               goto out;
+
+       data &= 0x0f;
+
+       if (data == 0x0f) {
+               ret = mmc_io_rw_direct(func->card, 0, 0,
+                       func->num * 0x100 + SDIO_FBR_STD_IF_EXT, 0, &data);
+               if (ret)
+                       goto out;
+       }
+
+       func->class = data;
+
+out:
+       return ret;
+}
+
 static int sdio_init_func(struct mmc_card *card, unsigned int fn)
 {
+       int ret;
        struct sdio_func *func;
 
        BUG_ON(fn > SDIO_MAX_FUNCS);
@@ -35,9 +61,21 @@ static int sdio_init_func(struct mmc_card *card, unsigned int fn)
 
        func->num = fn;
 
+       ret = sdio_read_fbr(func);
+       if (ret)
+               goto fail;
+
        card->sdio_func[fn - 1] = func;
 
        return 0;
+
+fail:
+       /*
+        * It is okay to remove the function here even though we hold
+        * the host lock as we haven't registered the device yet.
+        */
+       sdio_remove_func(func);
+       return ret;
 }
 
 static int sdio_read_cccr(struct mmc_card *card)