can't mount sd card on dm368

Hang,

From the logs there are no errors reported from the driver. Can you verify whether you are able to read/write to the card? You can try one simple command.

dd if=/dev/zero of=/dev/mmcblk0p1 bs=1024 count=1024

This will screw up the card. So you might have to format it again to make it useful. Can you share the dmesg logs after executing this command?

Hi Renjith!

the dmesg log  as follow:

#
# dd if=/dev/zero of=/dev/mmcblk0p1 bs=1024 count=1024
dd: /dev/mmcblk0p1: No such device or address

Hang,

Can you send me the output of the following commands?

cat /proc/devices

ls -l /dev/mmc*

# cat /proc/partitions
major minor  #blocks  name

  31     0       3072 mtdblock0
  31     1       2048 mtdblock1
  31     2       4096 mtdblock2
  31     3      24576 mtdblock3
  31     4       2048 mtdblock4
  31     5      95232 mtdblock5
 254     0    3813376 mmcblk0
 254     1    3807373 mmcblk0p1
#

# cat /proc/devices
Character devices:
  1 mem
  4 /dev/vc/0
  4 tty
  4 ttyS
  5 /dev/tty
  5 /dev/console
  5 /dev/ptmx
  7 vcs
 10 misc
 13 input
 14 sound
 21 sg
 81 video4linux
 89 i2c
 90 mtd
116 alsa
128 ptm
136 pts
247 cmem
248 dm365mmap
249 irqk
250 edma
251 dev_dma
252 dev_i2c
253 csl
254 rtc

Block devices:
  1 ramdisk
  8 sd
 31 mtdblock
 65 sd
 66 sd
 67 sd
 68 sd
 69 sd
 70 sd
 71 sd
128 sd
129 sd
130 sd
131 sd
132 sd
133 sd
134 sd
135 sd
254 mmc

#
# ls -l /dev/mmc*
brwxrwxrwx    1 40502    root     253,   0 Nov 11  2011 /dev/mmcblk0
brwxrwxrwx    1 40502    root     253,   1 Nov 11  2011 /dev/mmcblk0p1
#

Hi Renjith!

Thanks  a  lot!

Under your direction i have solved the problem!

Hang,

Glad that you've solved the issue. Can you mark this post as answered?

Hi Renjith :

i have the same problem for my DM365 board, SD cannot be detected :

platform : DM365

system : kernel 2.6.18, SDK 2_10_01_18

and i follow your suggestion, create a device by using mknod :

#mknod /dev/mmcblk0p1 254 0

but still didn't work, what should i do??? could you help me??? thanks in advanced!!!

some info. just like bellow:

# cat /proc/devices

Character devices:  

1 mem  

4 /dev/vc/0  

4 tty  

4 ttyS  

5 /dev/tty  

5 /dev/console  

5 /dev/ptmx  

7 vcs  

10 misc  

13 input  

14 sound  

29 fb  

81 video4linux  

89 i2c  

90 mtd

116 alsa

128 ptm

136 pts

180 usb

189 usb_device

249 DM365AEW

250 DM365AF

251 DaVinciResizer

252 DaVinciPreviewer

253 DM365FACEDETECT

254 rtc

Block devices:  

1 ramdisk  

31 mtdblock

254 mmc

# ls /dev/mmc* -l

ls: /dev/mmc*: No such file or directory

# cat /proc/partitions

major minor  #blocks  name

31     0       3840 mtdblock0  

31     1        256 mtdblock1  

31     2       4096 mtdblock2  

31     3      65536 mtdblock3  

 31     4     450560 mtdblock4  

 31     5          8 mtdblock5

 #

Antony,

Is you card getting detected during kernel bootup properly? Can you share the complete kernel logs?

0184.my dm365.txt

nice to hear you!!!

of course, please see it in my-dm365.txt

thanks!!!

Antony

Antony,

The card it self is not detected. After the log 

davinci-mmc davinci-mmc.0: Supporting 4-bit mode
davinci-mmc davinci-mmc.0: Using DMA mode

there is no card detection logs for sd card. I believe there might be some issue with the card or card detection logic. Remove the card and see whether you are still getting 

davinci-mmc davinci-mmc.0: Supporting 4-bit mode
davinci-mmc davinci-mmc.0: Using DMA mode 

logs.

Renjith :

the whole system (kernel 2.6.18 + filesys) it did run on DM365EVM board, and no problem with SD card, but our board without CPLD that controled SD WP & CD, it is the reason that my board cannot detect the SD device(in my board SD WP is connected to GPIO 3 and SD CD is connected to GPIO1) ???

 from the logs, can you see something wrong with HW issues or SW issues???

PS : may i ask you some question about camera image issues??? i cannot get the image data form OV 9715 , and my board without TVP5158(514x), TVP7002,THS7353!!

thanks

Antony

Antony,

The card detection logic in EVM is different from yours. I guess you better check your code for proper card detection logic. 

Regarding the camera, are you having  a proper driver for the OV9715 sensor? Are you able to do I2C read/write from/to the sensor?

Renjith :

thanks for your replay!!

1. "The card detection logic in EVM is different from yours" what do you mean??? could you give me more hints???

2. i don't have any OV9715 sensor driver, my program is based on V4L2 API, i thinks it need a driver for connecting with v4l2 port right???

because i cannot open /dev/video0 this device!!! or if you have such a driver, could provide me???

thanks very much!!!

Antony

Antony,

1. What I meant is the card detection in EVM uses CPLD, whereas you are detecting card using a GPIO directly. 

2. I don't have a ov9715 sensor driver with me. 

Renjith :

i see!!!

so could you teach me how to modify the source code for detecting SD card using GPIO??? please!!!

thanks very much again!!!

Antony

Antony,

There is no issue in teaching you. But it will take a lot of time as I don't have the code and your boards schematics with me. What I suggest you to do is to figure out how card detect works in EVM by enabling printks in the mmc driver. Understand the flow and understand how the hardware card detect works on EVM. Once you understand the flow, check your boards's schematics as to how your hardware connections are and make suitable modifications in your driver as well. 

Also one more thing you can try as a temporary solution is to understand the driver and modify(hardcode) the driver in such a way that it always assume that card is connected. This will help in validating your SD driver and you'll be able to do a read/write to the card.