Hi Zhangfei, Philip, arm/mmc friends, I have a quick question. I am using a pxa168 board that currently runs 2.6.28. Like several other people, I am having performance problems with the MMC support on this. [1] That is, I was getting "pxa-sdh pxa-sdh.0: DATA Line Error(status: 0x0010)!" every time that I read more than an MB or so of data off the MMC card. Since it is embarrassing to mention I'm using 2.6.28, I felt I should try to bringup mainline on this board. I pulled down 2.6.39-rc7. First thing that I noticed is that none of the pxa168 boards in arch/arm/mach-mmp/ such as aspenite, avlite, zylonite seem to implement MMC support. pxa168.h doesn't have any device entries for sdh. Am I right in thinking that's a bit weird given that this platform is quite old? Anyway, so I added the PXA168_DEVICE entries, APMU_CLK, CLKREG for sdh0,1,2,3 to pxa168.c/h. I assume that the appropriate driver to use is sdhci-pxa and not pxamci. Did that, and then tried to boot, and I get: [ 0.543587] mmc0: SDHCI controller on MMC [sdhci-pxa.0] using DMA [ 0.665327] mmc0: new SD card at address df08 [ 0.670686] mmcblk0: mmc0:df08 SU02G 1.84 GiB (ro) [ 10.686427] mmc0: Timeout waiting for hardware interrupt. [ 10.692391] mmcblk0: retrying using single block read [ 10.701043] mmcblk0: p1 p2 p3 [ 10.706259] VFS: Cannot open root device "mmcblk0p3" or unknown-block(179,3) [ 10.706484] Please append a correct "root=" boot option; here are the available partitions: [ 10.722024] b300 1931264 mmcblk0 driver: mmcblk [ 10.725923] b301 521885 mmcblk0p1 00000000-0000-0000-0000-000000000mmcblk0p1 [ 10.727453] b302 9455 mmcblk0p2 00000000-0000-0000-0000-000000000mmcblk0p2 [ 10.743379] b303 73749 mmcblk0p3 00000000-0000-0000-0000-000000000mmcblk0p3 The MMC card is fine, the same card boots fine when I switch the kernel back to 2.6.28. I suspect "timeout waiting for hw interrupt" above is where I should start debugging. Quick check shows the irqs as: arch/arm/mach-mmp/include/mach/irqs.h:#define IRQ_PXA168_SDH1 39 arch/arm/mach-mmp/include/mach/irqs.h:#define IRQ_PXA168_SDH2 40 Definitions look correct to me. Could you let me know if I've gone down a wrong path here, did I miss why none of the other pxa168 boards seem to have sdh setup? I would welcome any advice or suggestions that'll help me get mainline up and running on this. Thanks, jaya [1] http://plugcomputer.org/plugforum/index.php?topic=5088.0;wap2 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
