On 27 February 2013 21:19, Bernie Thompson <bhthompson@xxxxxxxxxxxx> wrote:
> The JEDEC MMC v4 spec defines a new PRV value in place of the original
> fwrev and hwrev specified in v1. We can expose this in the kernel to enable
> user space to more easily determine the product revision of a given MMC.
>
> Signed-off-by: Bernie Thompson <bhthompson@xxxxxxxxxxxx>
> ---
> Documentation/mmc/mmc-dev-attrs.txt | 1 +
> drivers/mmc/core/mmc.c | 3 +++
> include/linux/mmc/card.h | 1 +
> 3 files changed, 5 insertions(+)
>
> diff --git a/Documentation/mmc/mmc-dev-attrs.txt b/Documentation/mmc/mmc-dev-attrs.txt
> index 0d98fac..189bab0 100644
> --- a/Documentation/mmc/mmc-dev-attrs.txt
> +++ b/Documentation/mmc/mmc-dev-attrs.txt
> @@ -22,6 +22,7 @@ All attributes are read-only.
> manfid Manufacturer ID (from CID Register)
> name Product Name (from CID Register)
> oemid OEM/Application ID (from CID Register)
> + prv Product Revision (from CID Register) (SD and MMCv4 only)
> serial Product Serial Number (from CID Register)
> erase_size Erase group size
> preferred_erase_size Preferred erase size
> diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
> index c8f3d6e..d584f7c 100644
> --- a/drivers/mmc/core/mmc.c
> +++ b/drivers/mmc/core/mmc.c
> @@ -96,6 +96,7 @@ static int mmc_decode_cid(struct mmc_card *card)
> card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
> card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
> card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
> + card->cid.prv = UNSTUFF_BITS(resp, 48, 8);
> card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
> card->cid.month = UNSTUFF_BITS(resp, 12, 4);
> card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
> @@ -627,6 +628,7 @@ MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
> MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
> MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
> MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
> +MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
> MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
> MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
> card->ext_csd.enhanced_area_offset);
> @@ -645,6 +647,7 @@ static struct attribute *mmc_std_attrs[] = {
> &dev_attr_manfid.attr,
> &dev_attr_name.attr,
> &dev_attr_oemid.attr,
> + &dev_attr_prv.attr,
> &dev_attr_serial.attr,
> &dev_attr_enhanced_area_offset.attr,
> &dev_attr_enhanced_area_size.attr,
> diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
> index 61b2c30..f31725b 100644
> --- a/include/linux/mmc/card.h
> +++ b/include/linux/mmc/card.h
> @@ -17,6 +17,7 @@
> struct mmc_cid {
> unsigned int manfid;
> char prod_name[8];
> + unsigned char prv;
> unsigned int serial;
> unsigned short oemid;
> unsigned short year;
> --
> 1.8.1.3
>
> --
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Reviewed-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
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