<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><br>>> <a 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><br>>>
Not sure how to approach this problem, as the logic seems right.
Will do more testing in the meanwhile.<br></div><br>If you get stuck share your sources and let me know.<br><br></div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-05-13 14:03 GMT+04:00 Andre Marques <span dir="ltr"><<a 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 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 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 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 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 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 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 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>
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</blockquote>
</div>
</div>
</div>
<br>
</div>
</blockquote>
</div>
<br>
</div>
</div>
<br>
<fieldset></fieldset>
<br>
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</blockquote>
<br>
</div>
</div>
</div>
</blockquote>
</div>
<br>
</div>
</blockquote>
<br>
</div></div></div>
</blockquote></div><br></div>