Messages in this thread Patch in this message | | | Date | Wed, 14 Feb 2007 04:46:41 +0300 | From | "Eugene Ilkov" <> | Subject | 2.6.20 mmc: problem with highspeed SD card |
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I have I/O errors with Transcend SD highspeed card 2GB/150x when it's mounted in r/w mode (cardreader on sharp sl-c1000) It works well if I reverse mmcv4 patch commited to 2.6.19-git2 (http://lkml.org/lkml/2006/10/4/27) I'm not experienced in mmc, but I figured out that problem is somewhere in mmc_read_switch_caps() and when i change cmd.arg value from 0x80FFFFF1 to 0x00FFFFF1 it works fine too What argument should have SD_SWITCH opcode?
--- linux-2.6.20/drivers/mmc/mmc.c 2007-02-14 04:13:23.644408219 +0300 +++ linux-2.6.20.g/drivers/mmc/mmc.c 2007-02-14 04:19:09.642624022 +0300 @@ -1225,7 +1225,7 @@ memset(&cmd, 0, sizeof(struct mmc_command));
cmd.opcode = SD_SWITCH; - cmd.arg = 0x80FFFFF1; + cmd.arg = 0x00FFFFF1; cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
memset(&data, 0, sizeof(struct mmc_data)); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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