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authorBernie Thompson <bhthompson@chromium.org>2013-02-27 12:19:17 -0800
committerChris Ball <cjb@laptop.org>2013-03-22 12:10:42 -0400
commit51e7e8b632d8e564ba494dfa61358ac1a97e4ceb (patch)
tree39af1c9f7d5811d74f2c4cdecaace84137654704
parente3e020f8acbd39a6feb1b6903725aaf658b0fec4 (diff)
mmc: core: Add in support to expose PRV for v4 MMCs
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@chromium.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
-rw-r--r--Documentation/mmc/mmc-dev-attrs.txt1
-rw-r--r--drivers/mmc/core/mmc.c3
-rw-r--r--include/linux/mmc/card.h1
3 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/mmc/mmc-dev-attrs.txt b/Documentation/mmc/mmc-dev-attrs.txt
index 0d98fac8893b..189bab09255a 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 c8f3d6e0684e..d584f7ca168c 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 61b2c30c903b..f31725ba49f3 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;

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