From: Jaehoon Chung <jh80.chung@samsung.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [U-BOOT][PATCH] mmc: support the revision check for eMMC4.5
Date: Tue, 27 Mar 2012 16:16:05 +0900 [thread overview]
Message-ID: <4F716935.4070709@samsung.com> (raw)
eMMC card is introduced the eMMC4.5.
But now eMMC card is checked up to eMMC4.0.
This patch is supported until eMMC4.5
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
common/cmd_mmc.c | 5 ++++-
drivers/mmc/mmc.c | 25 +++++++++++++++++++++++++
include/mmc.h | 8 ++++++++
3 files changed, 37 insertions(+), 1 deletions(-)
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c
index 8f13c22..ff150ca 100644
--- a/common/cmd_mmc.c
+++ b/common/cmd_mmc.c
@@ -106,7 +106,10 @@ static void print_mmcinfo(struct mmc *mmc)
printf("Rd Block Len: %d\n", mmc->read_bl_len);
printf("%s version %d.%d\n", IS_SD(mmc) ? "SD" : "MMC",
- (mmc->version >> 4) & 0xf, mmc->version & 0xf);
+ (mmc->version >> 4) & 0xf,
+ (mmc->version & 0xf) == EXT_CSD_REV_1_5 ?
+ 41 :((mmc->version & 0xf) > EXT_CSD_REV_1_5 ?
+ (mmc->version & 0xf) - 1 : (mmc->version & 0xf)));
printf("High Capacity: %s\n", mmc->high_capacity ? "Yes" : "No");
puts("Capacity: ");
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 49c3349..e035012 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -651,6 +651,31 @@ int mmc_change_freq(struct mmc *mmc)
if (err)
return err;
+ switch (ext_csd[EXT_CSD_REV]) {
+ case EXT_CSD_REV_1_0:
+ mmc->version |= EXT_CSD_REV_1_0;
+ break;
+ case EXT_CSD_REV_1_1:
+ mmc->version |= EXT_CSD_REV_1_1;
+ break;
+ case EXT_CSD_REV_1_2:
+ mmc->version |= EXT_CSD_REV_1_2;
+ break;
+ case EXT_CSD_REV_1_3:
+ mmc->version |= EXT_CSD_REV_1_3;
+ break;
+ case EXT_CSD_REV_1_5:
+ mmc->version |= EXT_CSD_REV_1_5;
+ break;
+ case EXT_CSD_REV_1_6:
+ mmc->version |= EXT_CSD_REV_1_6;
+ break;
+ case EXT_CSD_REV_1_4:
+ default:
+ printf("Unknown revision - %x\n", ext_csd[EXT_CSD_REV]);
+ return 0;
+ }
+
/* No high-speed support */
if (!ext_csd[EXT_CSD_HS_TIMING])
return 0;
diff --git a/include/mmc.h b/include/mmc.h
index 30c2375..726da99 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -157,6 +157,14 @@
#define EXT_CSD_SEC_CNT 212 /* RO, 4 bytes */
#define EXT_CSD_HC_ERASE_GRP_SIZE 224 /* RO */
+#define EXT_CSD_REV_1_0 0
+#define EXT_CSD_REV_1_1 1
+#define EXT_CSD_REV_1_2 2
+#define EXT_CSD_REV_1_3 3
+#define EXT_CSD_REV_1_4 4
+#define EXT_CSD_REV_1_5 5
+#define EXT_CSD_REV_1_6 6
+
/*
* EXT_CSD field definitions
*/
--
1.7.4.1
next reply other threads:[~2012-03-27 7:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-27 7:16 Jaehoon Chung [this message]
2012-04-02 18:35 ` [U-Boot] [U-BOOT][PATCH] mmc: support the revision check for eMMC4.5 Jae hoon Chung
2012-09-01 6:15 ` Marek Vasut
2012-09-03 5:32 ` Jaehoon Chung
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4F716935.4070709@samsung.com \
--to=jh80.chung@samsung.com \
--cc=u-boot@lists.denx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox