[[Android]]~
[[Android kernel for bc9 (1/2)]]~
#contents
*Setup Android bootable linux kernel and userland for bc9 (gumstix) 2 [#j3d857a5]
**Installing file system images on onboard FlashROM [#iccbb4b4]
We need a serial connection with kermit and transfer system image file and kernel image file for installation.~
Please refer to following instructions for serial connection setting:
-[[gumstix developer site - Setting up a serial connection:http://www.gumstix.net/Software/view/Getting-started/Setting-up-a-serial-connection/111.html]]
Boot your gumstix, hit any key to stop the autoboot process and drop into U-Boot.
U-Boot 1.2.0 (Dec 21 2007 - 13:37:16) - PXA270@600 MHz - 1578M
*** Welcome to Gumstix ***
DRAM: 128 MB
Flash: 32 MB
Using default environment
Hit any key to stop autoboot: 0
If you successfully stop linux autoboot, you will get U-Boot prompt:
GUM>
Tell U-Boot to prepare to receive a file download at RAM location a2000000:
GUM> loadb a2000000
Break the serial connection and return to the kermit prompt by pressing Ctrl-backslash and then c. ~
Set up the file transfer as follows:
C-Kermit> cd ~/gumstix/gumstix-oe/tmp/deploy/glibc/images/gumstix-custom-verdex/
C-Kermit> send gumstix-basic-image-gumstix-custom-verdex.jffs2
Then, you will see the progress of the file upload process:
C-Kermit 8.0.211, 30 Mar 2008, localhost
Current Directory: /home/beat/gumstix/gumstix-oe/tmp/deploy/glibc/images/
Communication Device: /dev/ttyUSB0
Communication Speed: 115200
Parity: none
RTT/Timeout: 01 / 02
SENDING: => GUMSTIX-BASIC-IMAGE-GUMSTIX-CUSTOM-VERDEX.JFFS2
File Type: BINARY
File Size: 7491192
Percent Done: 2 /
...10...20...30...40...50...60...70...80...90..100
Estimated Time Left: 00:13:32
Transfer Rate, CPS: 8963
Window Slots: 1 of 1
Packet Type: D
Packet Count: 68
Packet Length: 4096
Error Count: 0
Last Error:
Last Message:
X to cancel file, Z to cancel group, to resend last packet,
E to send Error packet, ^C to quit immediately, ^L to refresh screen.
When this process completes you will get U-Boot prompt again. Then re-establish serial connection to gumstix:
GUM> connect
Protects flash sectors 0 and 1,which contain the U-BOOT bootloader. Then erase all other sectors of FlashROM:~
&color(red){Please never forget bootloader protection! If you forget that, gumstix will be bricked. Please be careful.};
GUM> protect on 1:0-1
GUM> erase all
Copy already transfered system image to FlashROM:
GUM> cp.b a2000000 40000 ${filesize}
{filesize} is automatically filled with variable filesize, which was set during upload process.~
So type just same as above.~
When you finished copy of system image, tell U-Boot to prepare to receive a file download again:
GUM> loadb a2000000
Break the serial connection and return to the kermit prompt by pressing Ctrl-backslash and then c. ~
Set up the file transfer as follows:
C-Kermit> send uImage-2.6.24-r1-gumstix-custom-verdex.bin
Re-establish serial connection to gumstix:
C-Kermit> connect
Install kernel image into FlashROM:
GUM> katinstall 100000
Load kernel image to memory and boot:
GUM> katload 100000
GUM> bootm
First boot after the system image installation takes rather longer time.~
First boot after the system image installation takes rather longer.~
Because jffs2 system image expansion and ssh key generation are performed during the first boot.~
Normaly it boots up only in 4 or 5 seconds.~
Unlike default 2.6.21 gumstix kernel, our modified 2.6.24 kernel is configured to build most drivers as modules.~
It is because FlashROM kernel sector is limited only 1M byte (max kernel size must be under 1048577 bytes).~
So after system image and kernel image installation, we must install kernel modules.~
We use USB flash memory to copy modules into gumstix's FlashROM.~
First connect USB flash memory to build machine and copy modules to it:
$ cd ~/gumstix/gumstix-oe/tmp/deploy/glibc/images/
$ cp modules-2.6.24-r1-gumstix-custom-verdex.tgz /media/disk/
Then disconnect USB flash memory and connect it to gumstix and extract modules into gumstix.
root@gumstix-custom-verdex:~$ tar -C / -zxvf /media/hdd/modules-2.6.24-r1-gumstix-custom-verdex.tgz
Some modules are already configured to be loaded at boot.~
However pxafb module is not configured, so we need to set up additional module loading as follows:
root@gumstix-custom-verdex:~$ vi /etc/modutils/pxafb
Just write pxafb in /etc/modutils/pxafb and save.
root@gumstix-custom-verdex:~$ vi /etc/modutils/fbcon
Just write fbcon in /etc/modutils/fbcon and save and:
root@gumstix-custom-verdex:~$ update-modules
**Confirming kernel's Android-compliant [#y58af703]
Confirm initialization of Android unique drivers, such as ashmem and logger, which is not included in default kernel.~
Following messages should be included in bootup messages:
ashmem: initialized
logger: created 64K log 'log_main'
logger: created 256K log 'log_events'
logger: created 64K log 'log_radio'
**Confirming framebuffer drawing [#jfd9ac6f]
Confirm that modified pxafb driver is functioning normally.~
First confirm that login prompt is shown in LCD screen.~
After boot, login gumstix and confirm that pxafb and fbcon are loaded by lsmod.~
root@gumstix-custom-verdex:~$ lsmod
Module Size Used by
i2c_dev 6052 0
mousedev 11528 0
i2c_pxa 6080 0
ipv6 244040 10
vfat 9824 0
fat 46076 1 vfat
nls_base 6432 2 vfat,fat
tsc2003 7632 0
i2c_core 18928 3 i2c_dev,i2c_pxa,tsc2003
pxamci 6816 0
pxafb 11144 1 [permanent]
cfbcopyarea 2976 1 pxafb
cfbimgblt 2496 1 pxafb
cfbfillrect 3488 1 pxafb
pxa2xx_cs 3368 1
pxa2xx_core 10368 1 pxa2xx_cs
proc_gpio 4492 0
pcmcia 26536 0
pcmcia_core 30704 2 pxa2xx_core,pcmcia
firmware_class 7424 1 pcmcia
ohci_hcd 20100 0
usbcore 122452 2 ohci_hcd
mmc_block 10244 0
mmc_core 46260 2 pxamci,mmc_block
fbcon 40312 65
tileblit 2272 1 fbcon
font 4384 1 fbcon
bitblit 4576 1 fbcon
fbcon_rotate 2336 1 bitblit
fbcon_cw 4928 1 fbcon_rotate
fbcon_ud 5024 1 fbcon_rotate
fbcon_ccw 5120 1 fbcon_rotate
softcursor 1600 4 bitblit,fbcon_cw,fbcon_ud,fbcon_ccw
fb 32208 8 pxafb,fbcon,tileblit,bitblit,fbcon_cw,fbcon_ud,fbcon_ccw,softcursor
evdev 8512 0
smc911x 18753 0
gumstix_smc911x 2688 1 smc911x
mii 4768 1 smc911x
If they are properly loaded, start df_dok command and confirm that it drawing patterns on LCD screen.
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RIGHT:by Satoshi OTSUKA
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