From: Reinhard Meyer <u-boot@emk-elektronik.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] mmc: seperate block number into small parts for multi-write cmd
Date: Mon, 06 Sep 2010 11:23:46 +0200 [thread overview]
Message-ID: <4C84B322.1000500@emk-elektronik.de> (raw)
In-Reply-To: <1283757567-15161-1-git-send-email-leiwen@marvell.com>
Dear Lei Wen,
> As mmc host limitation, the max number of block in one go
> should be limited to 65535, and the max buffer size should
> not excceed 512k bytes.
Where does this limitation supposedly come from?
And, 65535 blocks (of 512) are already near 32 MB.
TOP9000> mmci
mci: setting clock 194000 Hz, block size 512
mci: setting clock 24832000 Hz, block size 512
mci: setting clock 194000 Hz, block size 512
mci: setting clock 194000 Hz, block size 512
mci: setting clock 24832000 Hz, block size 512
Device: mci
Manufacturer ID: 3
OEM: 5344
Name: SD32G
Tran Speed: 25000000
Rd Block Len: 512
SD version 2.0
High Capacity: Yes
Capacity: 31914983424
Bus Width: 4-bit
TOP9000> mmc write 0 20000000 1000 18000
MMC write: dev # 0, block # 4096, count 98304 ... mci: setting clock 194000 Hz,
block size 512
mci: setting clock 24832000 Hz, block size 512
mci: setting clock 194000 Hz, block size 512
mci: setting clock 194000 Hz, block size 512
mci: setting clock 24832000 Hz, block size 512
98304 blocks written: OK
TOP9000>
Reinhard
next prev parent reply other threads:[~2010-09-06 9:23 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-06 7:19 [U-Boot] [PATCH] mmc: seperate block number into small parts for multi-write cmd Lei Wen
2010-09-06 8:28 ` Wolfgang Denk
2010-09-06 8:40 ` Lei Wen
2010-09-06 9:23 ` Reinhard Meyer [this message]
2010-09-06 9:31 ` Lei Wen
2010-09-06 10:16 ` Reinhard Meyer
2010-09-06 10:48 ` Lei Wen
2010-09-06 11:50 ` Reinhard Meyer
2010-10-10 4:20 ` Lei Wen
2010-10-10 6:48 ` Wolfgang Denk
2010-10-10 8:49 ` Lei Wen
2010-10-10 9:22 ` Wolfgang Denk
2010-10-10 9:27 ` Lei Wen
2010-10-10 9:39 ` Reinhard Meyer
2010-10-10 9:44 ` Lei Wen
2010-10-10 9:33 ` Reinhard Meyer
2010-10-10 9:42 ` Lei Wen
2010-10-11 3:42 ` [U-Boot] [PATCH V2] " Lei Wen
2010-10-11 9:00 ` Reinhard Meyer
2010-10-11 9:22 ` Wolfgang Denk
2010-10-11 9:27 ` Lei Wen
2010-10-11 10:44 ` [U-Boot] [PATCH] " Reinhard Meyer
2010-10-11 11:35 ` Wolfgang Denk
2010-10-11 15:39 ` [U-Boot] [PATCH V3] " Lei Wen
2010-10-13 19:57 ` Wolfgang Denk
2010-10-14 5:38 ` [U-Boot] [PATCH V4] " Lei Wen
2010-10-25 18:46 ` Steve Sakoman
2010-10-27 18:39 ` Wolfgang Denk
2010-10-27 19:59 ` Steve Sakoman
2010-10-27 6:04 ` [U-Boot] [PATCH V3] " Lei Wen
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