-----Original Message----- From: Lei Wen [mailto:adrian.wenl@gmail.com] Sent: Monday, September 20, 2010 6:29 PM To: Ghorai, Sukumar Cc: Wolfgang Denk; Lei Wen; u-boot@lists.denx.de; sshtylyov@mvista.com Subject: Re: [U-Boot] [PATCH 1/2 V3] mmc: add boundary check for mmc operation
Hi Ghorai,
[Ghorai] I was using the latest mmc/sd core for OMAP 4 and getting the
following error.
OMAP4430 SDP # mmc rescan 1 MMC: block number 0x1 exceeds max(0x0)OMAP4430 SDP #
Please let me know what I am missing.
[Ghorai] Thanks. I found the problem. It's a eMMC size calculation is wrong and here is the fix I am sending as a patch too in my next email.
From: Sukumar Ghorai s-ghorai@ti.com Date: Mon, 20 Sep 2010 18:29:29 +0530 Subject: [PATCH 1/3] fix for eMMC capacity calculation
capacity of the eMMC device available in ext-CSD register only
Signed-off-by: Sukumar Ghorai s-ghorai@ti.com --- drivers/mmc/mmc.c | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 80cd9bf..c543d83 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -627,6 +627,7 @@ int mmc_startup(struct mmc *mmc) uint mult, freq; u64 cmult, csize; struct mmc_cmd cmd; + char ext_csd[512];
/* Put the Card in Identify Mode */ cmd.cmdidx = MMC_CMD_ALL_SEND_CID; @@ -742,6 +743,16 @@ int mmc_startup(struct mmc *mmc) if (err) return err;
+ if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) { + /* check ext_csd version and capacity */ + err = mmc_send_ext_csd(mmc, ext_csd); + if (!err & (ext_csd[192] >= 2)) { + mmc->capacity = ext_csd[212] << 0 | ext_csd[213] << 8 | + ext_csd[214] << 16 | ext_csd[215] << 24; + mmc->capacity *= 512; + } + } + if (IS_SD(mmc)) err = sd_change_freq(mmc); else