Exposing CV SOCkit dev as usb mass storage gadget, accessible from windows 7 machine

[Altera_Forum]

I am attempting to use sockit as an g_mass_storage device as a quick and dirty USB link.  

 I get the error "could not insert 'g_mass_storage': no such device" when I run modprobe.  I am creating the backing file with the following command:    dd if=/dev/null of=./disk-file.img bs=1M seek=1024 count=0    And attempting to load the the driver with the following command:   modprobe g-mass-storage file=./disk-file.img  I have looked at the device tree and the boot messages, it definitely looks like the Arm is aware of the OTG controller.  Thanks in advance, Adam

[Altera_Forum]

According to this page ... 

 http://www.linux-usb.org/gadget/file_storage.html  You need to partition the backing store before passing it off to the USB gadget driver.  Cheers, Dave

[Altera_Forum]

Dave, 

 Thanks so much for your quick response.  I had run through the partitioning earlier today with no luck. I did it again and got the same results.  The fdisk parameters for the partition creation (n command if fdisk) are sector start/stop instead of cyclinder (which I see in the example). I will continue to cast about for a resolution to this. . .   here is my terminal dump with the commands that i ran:  root@arrow_sockit:~# dd bs=1M count=64 if=/dev/zero of=./backing_file 64+0 records in 64+0 records out root@arrow_sockit:~# fdisk backing_file Welcome to fdisk (util-linux 2.21.2).  Changes will remain in memory only, until you decide to write them. Be careful before using the write command.  Device does not contain a recognized partition table Building a new DOS disklabel with disk identifier 0xe3700929.  Command (m for help): x  Expert command (m for help): s Number of sectors (1-63, default 63): 8  Expert command (m for help): h Number of heads (1-256, default 255): 16  Expert command (m for help): c Number of cylinders (1-1048576, default 8): 1024  Expert command (m for help): r  Command (m for help): m Command action  a toggle a bootable flag  b edit bsd disklabel  c toggle the dos compatibility flag  d delete a partition  l list known partition types  m print this menu  n add a new partition  o create a new empty DOS partition table  p print the partition table  q quit without saving changes  s create a new empty Sun disklabel  t change a partition's system id  u change display/entry units  v verify the partition table  w write table to disk and exit  x extra functionality (experts only)  Command (m for help): n Partition type:  p primary (0 primary, 0 extended, 4 free)  e extended Select (default p): p Partition number (1-4, default 1): 1 First sector (2048-131071, default 2048): 1 Value out of range. First sector (2048-131071, default 2048): Using default value 2048 Last sector, +sectors or +size{K,M,G} (2048-131071, default 131071): Using default value 131071 Partition 1 of type Linux and of size 63 MiB is set  Command (m for help): t Selected partition 1 Hex code (type L to list codes): b Changed system type of partition 1 to b (W95 FAT32)  Command (m for help): p  Disk backing_file: 67 MB, 67108864 bytes 16 heads, 8 sectors/track, 1024 cylinders, total 131072 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xe3700929   Device Boot Start End Blocks Id System backing_file1 2048 131071 64512 b W95 FAT32  Command (m for help): w The partition table has been altered!   WARNING: If you have created or modified any DOS 6.x partitions, please see the fdisk manual page for additional information. Syncing disks.  root@arrow_sockit:~# modprobe g_mass_storage file=./backing_file ERROR: could not insert 'g_mass_storage': No such device root@arrow_sockit:~#

[Altera_Forum]

Thanks for the quick response, Dave. 

 I had tried the partitioning earlier and had no luck. The parmeters that fdisk asks for are not quite the same as the ones in the example, this bugs me. When I am partitioning it asks me for sector start/stop rather than cylinder.  I get the same error with modprobe.  Here is the full terminal dump:  Sending discover... Sending discover...  No lease, failing Starting portmap daemon... Sun Sep 29 01:40:00 UTC 2013 INIT: Entering runlevel: 5 Starting OpenBSD Secure Shell server: sshd NET: Registered protocol family 10 IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready done. Starting syslogd/klogd: done Starting Lighttpd Web Server: lighttpd. Starting blinking LED server Stopping Bootlog daemon: bootlogd.   _ ____ ____ _ ___ _ _ _____ _  / \ _ __ _ __ _____ __ / ___| ___ / ___| |/ (_) |_ / |___ / / |  / _ \ | '__| '__/ _ \ \ /\ / / \___ \ / _ \| | | ' /| | __| | | |_ \ | |  / ___ \| | | | | (_) \ V V / ___) | (_) | |___| . \| | |_ | |___) || | /_/ \_\_| |_| \___/ \_/\_/ |____/ \___/ \____|_|\_\_|\__| |_|____(_)_|  arrow_sockit login: root root@arrow_sockit:~# modprobe g_mass_storage ERROR: could not insert 'g_mass_storage': No such device root@arrow_sockit:~# modprobe g_mass_storage file=./backing_fi ERROR: could not insert 'g_mass_storage': No such device root@arrow_sockit:~# ls README disk-file.img readme adam_cool_beans disk_img.img soc_system.rbf altera hello sockit_golden_top.rbf backing_file hps_gpio test.txt bridgeoff.sh led_blink yipee_led bridgeon.sh led_blink_devices.sh clear_leds.sh my_first_hps root@arrow_sockit:~# modprobe g_mass_storage file=./backing_file ERROR: could not insert 'g_mass_storage': No such device root@arrow_sockit:~# modprobe g_mass_storag file=./backing_file FATAL: Module g_mass_storag not found. root@arrow_sockit:~# modprobe g_mass_storage file=./backing_file ERROR: could not insert 'g_mass_storage': No such device root@arrow_sockit:~# dd bs=1M count=64 if=/dev/zero of=./backing_file 64+0 records in 64+0 records out root@arrow_sockit:~# fdisk backing_file Welcome to fdisk (util-linux 2.21.2).  Changes will remain in memory only, until you decide to write them. Be careful before using the write command.  Device does not contain a recognized partition table Building a new DOS disklabel with disk identifier 0x5b98fcf9.  Command (m for help): x  Expert command (m for help): s Number of sectors (1-63, default 63): 8  Expert command (m for help): h Number of heads (1-256, default 255): 16  Expert command (m for help): c Number of cylinders (1-1048576, default 8): 1024  Expert command (m for help): r  Command (m for help): n Partition type:  p primary (0 primary, 0 extended, 4 free)  e extended Select (default p): p Partition number (1-4, default 1): 1 First sector (2048-131071, default 2048): Using default value 2048 Last sector, +sectors or +size{K,M,G} (2048-131071, default 131071): Using default value 131071 Partition 1 of type Linux and of size 63 MiB is set  Command (m for help): n Partition type:  p primary (1 primary, 0 extended, 3 free)  e extended Select (default p): p artition number (1-4, default 2): Using default value 2 No free sectors available  Command (m for help): exit e: unknown command Command action  a toggle a bootable flag  b edit bsd disklabel  c toggle the dos compatibility flag  d delete a partition  l list known partition types  m print this menu  n add a new partition  o create a new empty DOS partition table  p print the partition table  q quit without saving changes  s create a new empty Sun disklabel  t change a partition's system id  u change display/entry units  v verify the partition table  w write table to disk and exit  x extra functionality (experts only)  Command (m for help): q  root@arrow_sockit:~# dd bs=1M count=64 if=/dev/zero of=./backing_file 64+0 records in 64+0 records out root@arrow_sockit:~# fdisk backing_file Welcome to fdisk (util-linux 2.21.2).  Changes will remain in memory only, until you decide to write them. Be careful before using the write command.  Device does not contain a recognized partition table Building a new DOS disklabel with disk identifier 0xe3700929.  Command (m for help): x  Expert command (m for help): s Number of sectors (1-63, default 63): 8  Expert command (m for help): h Number of heads (1-256, default 255): 16  Expert command (m for help): c Number of cylinders (1-1048576, default 8): 1024  Expert command (m for help): r  Command (m for help): m Command action  a toggle a bootable flag  b edit bsd disklabel  c toggle the dos compatibility flag  d delete a partition  l list known partition types  m print this menu  n add a new partition  o create a new empty DOS partition table  p print the partition table  q quit without saving changes  s create a new empty Sun disklabel  t change a partition's system id  u change display/entry units  v verify the partition table  w write table to disk and exit  x extra functionality (experts only)  Command (m for help): n Partition type:  p primary (0 primary, 0 extended, 4 free)  e extended Select (default p): p Partition number (1-4, default 1): 1 First sector (2048-131071, default 2048): 1 Value out of range. First sector (2048-131071, default 2048): Using default value 2048 Last sector, +sectors or +size{K,M,G} (2048-131071, default 131071): Using default value 131071 Partition 1 of type Linux and of size 63 MiB is set  Command (m for help): t Selected partition 1 Hex code (type L to list codes): b Changed system type of partition 1 to b (W95 FAT32)  Command (m for help): p  Disk backing_file: 67 MB, 67108864 bytes 16 heads, 8 sectors/track, 1024 cylinders, total 131072 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xe3700929   Device Boot Start End Blocks Id System backing_file1 2048 131071 64512 b W95 FAT32  Command (m for help): w The partition table has been altered!   WARNING: If you have created or modified any DOS 6.x partitions, please see the fdisk manual page for additional information. Syncing disks. root@arrow_sockit:~# modprobe g_mass_storage file=./backing_file ERROR: could not insert 'g_mass_storage': No such device root@arrow_sockit:~# root@arrow_sockit:~# modprobe g_mass_storage file=./backing_file -sh: root@arrow_sockit:~#: command not found root@arrow_sockit:~# ERROR: could not insert 'g_mass_storage': No such device -sh: ERROR:: command not found root@arrow_sockit:~# root@arrow_sockit:~# -sh: root@arrow_sockit:~#: command not found root@arrow_sockit:~#

[Altera_Forum]

Hey Dave, 

 Thanks for the quick response. I had tried to partition earlier with no luck. I tried again, with no luck.  One insoncistency that I saw was that the when I use the "n" option in fdisk that it asks me for start/end sectors instead of cylinders that I see in the example.   Thanks, Adam

[Altera_Forum]

Here is the terminal dump for the commands that I used: 

 root@arrow_sockit:~# dd bs=1M count=64 if=/dev/zero of=./backing_file 64+0 records in 64+0 records out root@arrow_sockit:~# fdisk -c=dos Usage: fdisk [options] <disk> change partition table fdisk [options] -l <disk> list partition table(s) fdisk -s <partition> give partition size(s) in blocks  Options: -b <size> sector size (512, 1024, 2048 or 4096) -c[=<mode>] compatible mode: 'dos' or 'nondos' (default) -h print this help text -u[=<unit>] display units: 'cylinders' or 'sectors' (default) -v print program version -C <number> specify the number of cylinders -H <number> specify the number of heads -S <number> specify the number of sectors per track  root@arrow_sockit:~# fdisk -c='dos' Usage: fdisk [options] <disk> change partition table fdisk [options] -l <disk> list partition table(s) fdisk -s <partition> give partition size(s) in blocks  Options: -b <size> sector size (512, 1024, 2048 or 4096) -c[=<mode>] compatible mode: 'dos' or 'nondos' (default) -h print this help text -u[=<unit>] display units: 'cylinders' or 'sectors' (default) -v print program version -C <number> specify the number of cylinders -H <number> specify the number of heads -S <number> specify the number of sectors per track  root@arrow_sockit:~# fdisk c=dos Welcome to fdisk (util-linux 2.21.2).  Changes will remain in memory only, until you decide to write them. Be careful before using the write command.  fdisk: unable to open c=dos: No such file or directory root@arrow_sockit:~# fdisk -c=dos ./backing_file Welcome to fdisk (util-linux 2.21.2).  Changes will remain in memory only, until you decide to write them. Be careful before using the write command.  Device does not contain a recognized partition table Building a new DOS disklabel with disk identifier 0xb4aa408e.  WARNING: DOS-compatible mode is deprecated. It's strongly recommended to  switch off the mode (with command 'c'). Command (m for help): e e: unknown command Command action  a toggle a bootable flag  b edit bsd disklabel  c toggle the dos compatibility flag  d delete a partition  l list known partition types  m print this menu  n add a new partition  o create a new empty DOS partition table  p print the partition table  q quit without saving changes  s create a new empty Sun disklabel  t change a partition's system id  u change display/entry units  v verify the partition table  w write table to disk and exit  x extra functionality (experts only)  Command (m for help): x  Expert command (m for help): s Number of sectors (1-63, default 63): 8 Warning: setting sector offset for DOS compatiblity  Expert command (m for help): h Number of heads (1-256, default 255): 16  Expert command (m for help): c Number of cylinders (1-1048576, default 8): 1024  Expert command (m for help): r  Command (m for help): n Partition type:  p primary (0 primary, 0 extended, 4 free)  e extended Select (default p): p Partition number (1-4, default 1): 1 First sector (8-131071, default 8): Using default value 8 Last sector, +sectors or +size{K,M,G} (8-131071, default 131071): Using default value 131071 Partition 1 of type Linux and of size 64 MiB is set  Command (m for help): t Selected partition 1 Hex code (type L to list codes): b Changed system type of partition 1 to b (W95 FAT32)  Command (m for help): o Building a new DOS disklabel with disk identifier 0xee0c56f2.  WARNING: DOS-compatible mode is deprecated. It's strongly recommended to  switch off the mode (with command 'c'). Command (m for help): p  Disk ./backing_file: 67 MB, 67108864 bytes 16 heads, 8 sectors/track, 1024 cylinders, total 131072 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xee0c56f2   Device Boot Start End Blocks Id System  Command (m for help): w The partition table has been altered!   WARNING: If you have created or modified any DOS 6.x partitions, please see the fdisk manual page for additional information. Syncing disks. root@arrow_sockit:~# modprobe g_mass_storage file=./backing_file

[Altera_Forum]

Hi Adam, 

  --- Quote Start ---   I had tried to partition earlier with no luck. I tried again, with no luck.   --- Quote End ---   Sorry, your response is not clear; you had no luck partitioning the backing store, or you did partition it ok and had no luck with the USB gadget interface using it?  I have an SoCKit ordered, but have not received it yet, so cannot try this yet.  Cheers, Dave