Hello world,
This is my first post in this forum.
I have the RK27xx based MP4 player, MWalker BL621 (Nebula).
http://www.quantum-optimum.com/mp4/bl621.html
As a GNU/Linux user, I were also having problems to access the device. But
luckily the problem has been resoled in the new Linux kernel v2.6.27.
Here is the link/solution to the probolem.
http://bugzilla.kernel.org/show_bug.cgi?id=11423
If you can to acces other DRIVES in the device, you still need to
enable certain feature SCSI module. Here is my simple guide to enable it.
# make menuconfig
Device Drivers -> SCSI Device Support
Enable "Probe all LUNs on seach SCSI device"
Code:
*** Some SCSI devices (e.g. CD jukebox) support multiple LUNs
==>[*] Probe all LUNs on each SCSI device[*] Verbose SCSI error reporting (kernel size +=12K)
[ ] SCSI logging facility
Compile it and use the new module or restart with the new kernel.
Now here is how it looks when I hooked the device to my PC.
Code:
# dmesg
[ 4802.936760] scsi4 : SCSI emulation for USB Mass Storage devices
[ 4802.937265] usb-storage: device found at 4
[ 4802.937272] usb-storage: waiting for device to settle before scanning
[ 4807.940333] scsi 4:0:0:0: Direct-Access RockChip USBDISK Sys 1.00 PQ: 0 ANSI: 0
[ 4807.941516] sd 4:0:0:0: [sdb] Attached SCSI removable disk
[ 4807.942745] sd 4:0:0:0: Attached scsi generic sg2 type 0
[ 4807.944072] scsi 4:0:0:1: Direct-Access RockChip USBDISK User 1.00 PQ: 0 ANSI: 0
[ 4807.944900] sd 4:0:0:1: [sdc] Attached SCSI removable disk
[ 4807.944973] sd 4:0:0:1: Attached scsi generic sg3 type 0
[ 4807.946386] scsi 4:0:0:2: Direct-Access RockChip USBDISK SD 1.00 PQ: 0 ANSI: 0 CCS
[ 4807.947270] sd 4:0:0:2: [sdd] Attached SCSI removable disk
[ 4807.947342] sd 4:0:0:2: Attached scsi generic sg4 type 0
[ 4807.949270] usb-storage: device scan complete
[ 4810.004224] sd 4:0:0:0: [sdb] 122880 512-byte hardware sectors (63 MB)
[ 4810.004233] sd 4:0:0:0: [sdb] Assuming Write Enabled
[ 4810.004237] sd 4:0:0:0: [sdb] Assuming drive cache: write through
[ 4810.015420] sd 4:0:0:0: [sdb] 122880 512-byte hardware sectors (63 MB)
[ 4810.015428] sd 4:0:0:0: [sdb] Assuming Write Enabled
[ 4810.015431] sd 4:0:0:0: [sdb] Assuming drive cache: write through
[ 4810.015691] sdb:<5>sd 4:0:0:1: [sdc] 3892224 512-byte hardware sectors (1993 MB)
[ 4810.016692] sd 4:0:0:1: [sdc] Assuming Write Enabled
[ 4810.016698] sd 4:0:0:1: [sdc] Assuming drive cache: write through
[ 4810.018775]
[ 4810.020864] sd 4:0:0:1: [sdc] 3892224 512-byte hardware sectors (1993 MB)
[ 4810.020871] sd 4:0:0:1: [sdc] Assuming Write Enabled
[ 4810.020876] sd 4:0:0:1: [sdc] Assuming drive cache: write through
[ 4810.020882] sdc:
[ 4810.080833] sd 4:0:0:2: [sdd] 3842048 512-byte hardware sectors (1967 MB)
[ 4810.080842] sd 4:0:0:2: [sdd] Assuming Write Enabled
[ 4810.080847] sd 4:0:0:2: [sdd] Assuming drive cache: write through
[ 4810.085145] sd 4:0:0:2: [sdd] 3842048 512-byte hardware sectors (1967 MB)
[ 4810.085154] sd 4:0:0:2: [sdd] Assuming Write Enabled
[ 4810.085157] sd 4:0:0:2: [sdd] Assuming drive cache: write through
[ 4810.085161] sdd: sdd1
Notice that the device has 3 DRIVES.
/dev/sdb - 63MB (system)
/dev/sdc - around 2GB (user)
/dev/sdd - around 2GB miniSD drive.
Now you can mount to the drives. Example: to mount to the device's sys drive.
Code:
# mount /dev/sdb /mnt/usb/
# ls -l /mnt/usb/
total 10
drwxr-xr-x 4 root root 2048 2008-05-08 09:47 appdata/
drwxr-xr-x 6 root root 2048 2008-05-08 09:47 resource/
-rwxr-xr-x 1 root root 512 1979-12-31 23:30 rkfswfrc.frc*
drwxr-xr-x 2 root root 2048 2008-10-31 22:27 system/
drwxr-xr-x 2 root root 2048 2008-10-31 22:27 system00/
Before removing the device, please do and wait until the umount
command finished.
Code:
# umount /mnt/usb
#
About the player.
Pro:
1) It has nice and simple looking look.
2) The UI also very simple with no fancy/animated menu.
3) It has miniSD slot, radio and TV out
4) Plays FLV, MOV, AVI, MP3, FLAC quite well.
Cons:
1) Navigations quite terrible and have to make use of it.
2) It cannot play OGG and MIDI format, even the files are listed in
Playlist
3) Sometimes, it no responsive to any buttons when auto display off and
auto lock are enabled.
4) In the system drives/appdata, there are koules and tank games, but
no GAME menu in UI
Wishlist...
1) Games
2) OGG playback
3) If possible MIDI playback.
Thank you
Systems:
HW:
CPU : AMD Phenom 9950 BE Quad Core ( OCed to 3GHz)
RAM : 4GB
MB : MSI DKA790GX MS-7550
GC : XfX GeForce 9800 GT
SW:
Linux : 2.6.27
Distro : Slamd64 12.1 (Slackware clone for AMD64/EM64T)
p/s: I just finished uploaded the BL621's firmware...