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    <div class="moz-cite-prefix">On 05/13/14 12:15, Andrey Mozzhuhin
      wrote:<br>
    </div>
    <blockquote
cite="mid:CAAXQfbGmvddfKpc1z1F1Fc_Je0xx5jOjQfD=C7hxsocrP8_Z5A@mail.gmail.com"
      type="cite">
      <div dir="ltr">
        <div>
          <div>Do you not forget to call rtems_blkdev_request_done in
            read routine of block device driver? <br>
          </div>
          Also try to increase CONFIGURE_MAXIMUM_TASKS - bdbuf need some
          worker tasks.<br>
        </div>
      </div>
    </blockquote>
    <br>
    I call rtems_blkdev_request_done after each read request, and
    changing CONFIGURE_MAXIMUM_TASKS to 20 (instead of 2) did not had
    any impact.<br>
    <br>
    <blockquote
cite="mid:CAAXQfbGmvddfKpc1z1F1Fc_Je0xx5jOjQfD=C7hxsocrP8_Z5A@mail.gmail.com"
      type="cite">
      <div dir="ltr">
        <div><br>
          >> <a moz-do-not-send="true"
            href="https://github.com/jncronin/rpi-boot/blob/master/emmc.c"
            target="_blank">https://github.com/jncronin/rpi-boot/blob/master/emmc.c</a><br>
          <br>
        </div>
        <div>Hmm. Implementation specific to Raspberry Pi is not good
          idea. It is better to separate MMC/SD protocol implementation
          and hardware support like in FreeBSD or Linux.<br>
        </div>
      </div>
    </blockquote>
    <br>
    Yes, the point in the end is probably to have the MMC/SD protocol
    somewhere else, just like the spi-sd-card driver (SD card access
    through SPI interface protocol, at c/src/libchip/i2c/spi-sd-card*).<br>
    <br>
    <blockquote
cite="mid:CAAXQfbGmvddfKpc1z1F1Fc_Je0xx5jOjQfD=C7hxsocrP8_Z5A@mail.gmail.com"
      type="cite">
      <div dir="ltr">
        <div><br>
          >> Not sure how to approach this problem, as the logic
          seems right. Will do more testing in the meanwhile.<br>
        </div>
        <br>
      </div>
    </blockquote>
    <br>
    Today I have re-formated the card (under Linux), and the block data
    read on RPi checks with the card hexdump on Linux.<br>
    <br>
    So far I tested:<br>
    <br>
    - The block data that is being read, and compared with the same
    block data read on Linux (small mismatch (4 bits) at the middle of a
    512 byte block before, no mismatch now)<br>
    <br>
    - The request buffer contents
    (<a class="moz-txt-link-freetext" href="http://www.rtems.org/onlinedocs/doxygen/cpukit/html/structrtems__blkdev__sg__buffer.html">http://www.rtems.org/onlinedocs/doxygen/cpukit/html/structrtems__blkdev__sg__buffer.html</a>).
    Looking at this I don't know what the User pointer is. I'm using the
    buffer pointer to store my readings.<br>
    <br>
    - Reading the partition table from the first block. I can read the
    first block and register the card partition as a logical disk, so
    reading and registering the partition table is no problem.<br>
    <br>
    - Tried also a busy wait between block readings.<br>
    <br>
    The result is always the same: when mounting the card partition, it
    reads the first two partition blocks and then hangs.<br>
    <br>
    <blockquote
cite="mid:CAAXQfbGmvddfKpc1z1F1Fc_Je0xx5jOjQfD=C7hxsocrP8_Z5A@mail.gmail.com"
      type="cite">
      <div dir="ltr">If you get stuck share your sources and let me
        know.<br>
        <br>
      </div>
    </blockquote>
    <br>
    Will try to get the code to github soon.<br>
    <br>
    <blockquote
cite="mid:CAAXQfbGmvddfKpc1z1F1Fc_Je0xx5jOjQfD=C7hxsocrP8_Z5A@mail.gmail.com"
      type="cite">
      <div class="gmail_extra"><br>
        <br>
        <div class="gmail_quote">2014-05-13 14:03 GMT+04:00 Andre
          Marques <span dir="ltr"><<a moz-do-not-send="true"
              href="mailto:andre.lousa.marques@gmail.com"
              target="_blank">andre.lousa.marques@gmail.com</a>></span>:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div bgcolor="#FFFFFF" text="#000000">
              <div class="">
                <div>On 05/12/14 19:25, Andrey Mozzhuhin wrote:<br>
                </div>
                <blockquote type="cite">
                  <div dir="ltr">
                    <div>I think you need start with simple tests
                      without file systems and block device driver.<br>
                    </div>
                    <div>
                      <div>Try read and write blocks with known patterns
                        and check it on PC and Raspberry Pi.<br>
                        <br>
                      </div>
                    </div>
                  </div>
                </blockquote>
                <br>
              </div>
              I have checked the data read by my emmc driver from the
              first two blocks (the ones it reads) on the RPi, and
              compared with an hexdump of those same two blocks on
              Linux, and there is a small mismatch at the middle of the
              first block.<br>
              <br>
              Not sure how to approach this problem, as the logic seems
              right. Will do more testing in the meanwhile.
              <div class=""><br>
                <br>
                <blockquote type="cite">
                  <div dir="ltr">
                    <div>
                      <div>What are you use for MMC/SD protocol? Can I
                        see it and block device driver somewhere?<br>
                      </div>
                    </div>
                  </div>
                </blockquote>
                <br>
              </div>
              I'm porting the following code<br>
              <br>
              <a moz-do-not-send="true"
                href="https://github.com/jncronin/rpi-boot/blob/master/emmc.c"
                target="_blank">https://github.com/jncronin/rpi-boot/blob/master/emmc.c</a><br>
              <br>
              and using the following SD card documentation<br>
              <br>
              Physical Layer Simplified Specification (3.01)  -
              <a moz-do-not-send="true"
href="https://www.sdcard.org/downloads/pls/simplified_specs/archive/part1_301.pdf"
                target="_blank">https://www.sdcard.org/downloads/pls/simplified_specs/archive/part1_301.pdf</a><br>
              <br>
              Host Controller Simplified Specification (2.00) -
              <a moz-do-not-send="true"
href="https://www.sdcard.org/downloads/pls/simplified_specs/archive/partA2_200.pdf"
                target="_blank">https://www.sdcard.org/downloads/pls/simplified_specs/archive/partA2_200.pdf</a><br>
              <br>
              and the raspberry soc datasheet: Broadcom BCM2835
              Peripherals Guide (Chapter 5 - EMMC) <br>
              <div>
                <div class="h5"> <br>
                  <blockquote type="cite">
                    <div dir="ltr">
                      <div>
                        <div> </div>
                      </div>
                    </div>
                    <div class="gmail_extra"><br>
                      <br>
                      <div class="gmail_quote">2014-05-12 20:23
                        GMT+04:00 Andre Marques <span dir="ltr"><<a
                            moz-do-not-send="true"
                            href="mailto:andre.lousa.marques@gmail.com"
                            target="_blank">andre.lousa.marques@gmail.com</a>></span>:<br>
                        <blockquote class="gmail_quote" style="margin:0
                          0 0 .8ex;border-left:1px #ccc
                          solid;padding-left:1ex">
                          <div bgcolor="#FFFFFF" text="#000000">
                            <div>Hello,<br>
                              <br>
                              I have used the pc386 BSP to mount the
                              card (before your suggestions) using the
                              fileio sample and it could read the card
                              contents perfectly.<br>
                              <br>
                              Then I filled the card with zeros using dd
                              on Linux, modified the fileio sample to
                              format the card with msdos_format(dev,
                              NULL) and then mounted it on the pc 386
                              BSP fileio sample and I could write and
                              read the card.<br>
                              <br>
                              On Linux I set the card with the necessary
                              files for Raspberry, and when my driver
                              tries to mount the card on the Raspberry
                              Pi it reads the first 2 blocks (now 0 and
                              1, because the card has no partition
                              table) and hangs, just as before.<br>
                              <br>
                              I guess my driver is having some reading
                              problems.
                              <div>
                                <div><br>
                                  <br>
                                  On 05/05/14 19:30, Andrey Mozzhuhin
                                  wrote:<br>
                                </div>
                              </div>
                            </div>
                            <div>
                              <div>
                                <blockquote type="cite">
                                  <div dir="ltr">You can try to use SD
                                    Card in <span lang="en"><span>opposite</span></span>
                                    direction:<br>
                                    <div>0) fill SD Card with zeroes;<br>
                                    </div>
                                    1) format partition under RTEMS with
                                    msdos_format() function;<br>
                                    2) check that PC can read/write this
                                    SD Card;<br>
                                    3) if PC fails to mount this
                                    partition - dump SD Card and check
                                    that all data is on right sectors.<br>
                                    <div><br>
                                    </div>
                                    <div class="gmail_extra"><br>
                                      <br>
                                      <div class="gmail_quote">2014-05-05
                                        22:28 GMT+04:00 Andrey Mozzhuhin
                                        <span dir="ltr"><<a
                                            moz-do-not-send="true"
                                            href="mailto:nopscmn@gmail.com"
                                            target="_blank">nopscmn@gmail.com</a>></span>:<br>
                                        <blockquote class="gmail_quote"
                                          style="margin:0 0 0
                                          .8ex;border-left:1px #ccc
                                          solid;padding-left:1ex">
                                          <div dir="ltr">
                                            <div>
                                              <div>
                                                <div>
                                                  <div>Hi, Andre<br>
                                                    <br>
                                                  </div>
                                                  You can try to use SD
                                                  Card in <span
                                                    lang="en"><span>opposite</span></span>
                                                  direction:<br>
                                                </div>
                                                <div>0) fill SD Card
                                                  with zeroes;<br>
                                                </div>
                                                1) format partition
                                                under RTEMS with
                                                msdos_format() function;<br>
                                              </div>
                                              2) check that PC can
                                              read/write this SD Card;<br>
                                            </div>
                                            3) if PC fails to mount this
                                            partition - dump SD Card and
                                            check that all data is on
                                            right sectors.<br>
                                            <div><br>
                                            </div>
                                          </div>
                                          <div class="gmail_extra"><br>
                                            <br>
                                            <div class="gmail_quote">2014-05-05
                                              13:52 GMT+04:00 Andre
                                              Marques <span dir="ltr"><<a
                                                  moz-do-not-send="true"
href="mailto:andre.lousa.marques@gmail.com" target="_blank">andre.lousa.marques@gmail.com</a>></span>:
                                              <div>
                                                <div><br>
                                                  <blockquote
                                                    class="gmail_quote"
                                                    style="margin:0 0 0
                                                    .8ex;border-left:1px
                                                    #ccc
                                                    solid;padding-left:1ex">Hello,<br>
                                                    <br>
                                                    Following the
                                                    problem in<br>
                                                    <br>
                                                    <a
                                                      moz-do-not-send="true"
href="http://www.rtems.org/pipermail/rtems-devel/2014-April/006585.html"
                                                      target="_blank">http://www.rtems.org/pipermail/rtems-devel/2014-April/006585.html</a><br>
                                                    <br>
                                                    I am now trying to
                                                    mount the SD card
                                                    partitions on RTEMS.<br>
                                                    <br>
                                                    Summarizing the
                                                    process:<br>
                                                    <br>
                                                    1.
                                                    rtems_io_register_driver
                                                    (by calling my
                                                    driver with
                                                    CONFIGURE_APPLICATION_EXTRA_DRIVERS
                                                    on hello sample)<br>
                                                    <br>
                                                    2.
                                                    rtems_filesystem_make_dev_t
                                                    (to get the device
                                                    file)<br>
                                                    <br>
                                                    3.
                                                     rtems_disk_io_initialize<br>
                                                    <br>
                                                    4.
                                                    rtems_disk_create_phys
                                                    (to create the disk,
                                                    at /dev/sdc0)<br>
                                                    <br>
                                                    5.
                                                    rtems_bdpart_register_from_disk
                                                    (to read and
                                                    register the
                                                    partitions)<br>
                                                    <br>
                                                    6. rtems_fsmount (to
                                                    mount the
                                                    partitions)<br>
                                                    <br>
                                                    For rtems_fsmount I
                                                    am providing the
                                                    following fs_table:<br>
                                                    <br>
                                                    rtems_fstab_entry
                                                    fs_table [] = {<br>
                                                       {<br>
                                                         .source =
                                                    "/dev/sdc0",<br>
                                                         .target =
                                                    "/mnt/p1",<br>
                                                         .type =
                                                    "dosfs",<br>
                                                         .options =
                                                    RTEMS_FILESYSTEM_READ_WRITE,<br>
                                                         .report_reasons
                                                    =  RTEMS_FSTAB_ANY,<br>
                                                         .abort_reasons
                                                    = RTEMS_FSTAB_OK<br>
                                                       },{<br>
                                                         .source =
                                                    "/dev/sdc01",<br>
                                                         .target =
                                                    "/mnt/p2",<br>
                                                         .type =
                                                    "dosfs",<br>
                                                         .options =
                                                    RTEMS_FILESYSTEM_READ_WRITE,<br>
                                                         .report_reasons
                                                    = RTEMS_FSTAB_ANY,<br>
                                                         .abort_reasons
                                                    = RTEMS_FSTAB_NONE<br>
                                                       }<br>
                                                     };<br>
                                                    <br>
                                                    The SD card has only
                                                    one partition
                                                    starting at block
                                                    number 8192.<br>
                                                    <br>
                                                    After I call
                                                    rtems_fsmount it
                                                    calls my driver to
                                                    read block 8192 and
                                                    8193 and then hangs.<br>
                                                    <br>
                                                    I have tested the
                                                    driver and It seems
                                                    to have no problem
                                                    reading single or
                                                    multiple blocks.<br>
                                                    <br>
                                                    Any tips?<br>
                                                    <br>
                                                    Also I am using the
                                                    following confdefs
                                                    configuration (some
                                                    values are
                                                    exaggerated):<br>
                                                    <br>
                                                    #define
                                                    CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER<br>
                                                    #define
                                                    CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER<br>
                                                    #define
                                                    CONFIGURE_APPLICATION_NEEDS_LIBBLOCK<br>
                                                    <br>
                                                    #define
                                                    CONFIGURE_FILESYSTEM_DOSFS<br>
                                                    #define
                                                    CONFIGURE_USE_IMFS_AS_BASE_FILESYSTEM<br>
                                                    <br>
                                                    #define
                                                    CONFIGURE_APPLICATION_EXTRA_DRIVERS
SD_CARD_DRIVER_TABLE_ENTRY<br>
                                                    <br>
                                                    #define
                                                    CONFIGURE_LIBIO_MAXIMUM_FILE_DESCRIPTORS
                                                    20<br>
                                                    <br>
                                                    #define
                                                    CONFIGURE_MAXIMUM_TASKS
                                                    2<br>
                                                    #define
                                                    CONFIGURE_MAXIMUM_DRIVERS
                                                    10<br>
                                                    <br>
                                                    #define
                                                    CONFIGURE_RTEMS_INIT_TASKS_TABLE<br>
                                                    <br>
                                                     #define
                                                    CONFIGURE_INIT_TASK_STACK_SIZE
                                                    (32 * 1024)<br>
                                                    <br>
                                                    #define
                                                    CONFIGURE_INITIAL_EXTENSIONS
RTEMS_TEST_INITIAL_EXTENSION<br>
                                                    <br>
                                                    #define
                                                    CONFIGURE_INIT<br>
                                                    <br>
                                                    --André Marques<br>
                                                    <br>
_______________________________________________<br>
                                                    rtems-devel mailing
                                                    list<br>
                                                    <a
                                                      moz-do-not-send="true"
href="mailto:rtems-devel@rtems.org" target="_blank">rtems-devel@rtems.org</a><br>
                                                    <a
                                                      moz-do-not-send="true"
href="http://www.rtems.org/mailman/listinfo/rtems-devel" target="_blank">http://www.rtems.org/mailman/listinfo/rtems-devel</a><br>
                                                  </blockquote>
                                                </div>
                                              </div>
                                            </div>
                                            <br>
                                          </div>
                                        </blockquote>
                                      </div>
                                      <br>
                                    </div>
                                  </div>
                                  <br>
                                  <fieldset></fieldset>
                                  <br>
                                  <pre>_______________________________________________
rtems-devel mailing list
<a moz-do-not-send="true" href="mailto:rtems-devel@rtems.org" target="_blank">rtems-devel@rtems.org</a>
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</pre>
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                                <br>
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