mirror of
https://github.com/torvalds/linux.git
synced 2024-12-25 12:21:37 +00:00
2f82af08fc
Due to problems at cam.org, my nico@cam.org email address is no longer valid. FRom now on, nico@fluxnic.net should be used instead. Signed-off-by: Nicolas Pitre <nico@fluxnic.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
99 lines
3.5 KiB
Plaintext
99 lines
3.5 KiB
Plaintext
ADS GraphicsClient Plus Single Board Computer
|
|
|
|
For more details, contact Applied Data Systems or see
|
|
http://www.applieddata.net/products.html
|
|
|
|
The original Linux support for this product has been provided by
|
|
Nicolas Pitre <nico@fluxnic.net>. Continued development work by
|
|
Woojung Huh <whuh@applieddata.net>
|
|
|
|
It's currently possible to mount a root filesystem via NFS providing a
|
|
complete Linux environment. Otherwise a ramdisk image may be used. The
|
|
board supports MTD/JFFS, so you could also mount something on there.
|
|
|
|
Use 'make graphicsclient_config' before any 'make config'. This will set up
|
|
defaults for GraphicsClient Plus support.
|
|
|
|
The kernel zImage is linked to be loaded and executed at 0xc0200000.
|
|
Also the following registers should have the specified values upon entry:
|
|
|
|
r0 = 0
|
|
r1 = 29 (this is the GraphicsClient architecture number)
|
|
|
|
Linux can be used with the ADS BootLoader that ships with the
|
|
newer rev boards. See their documentation on how to load Linux.
|
|
Angel is not available for the GraphicsClient Plus AFAIK.
|
|
|
|
There is a board known as just the GraphicsClient that ADS used to
|
|
produce but has end of lifed. This code will not work on the older
|
|
board with the ADS bootloader, but should still work with Angel,
|
|
as outlined below. In any case, if you're planning on deploying
|
|
something en masse, you should probably get the newer board.
|
|
|
|
If using Angel on the older boards, here is a typical angel.opt option file
|
|
if the kernel is loaded through the Angel Debug Monitor:
|
|
|
|
----- begin angelboot.opt -----
|
|
base 0xc0200000
|
|
entry 0xc0200000
|
|
r0 0x00000000
|
|
r1 0x0000001d
|
|
device /dev/ttyS1
|
|
options "38400 8N1"
|
|
baud 115200
|
|
#otherfile ramdisk.gz
|
|
#otherbase 0xc0800000
|
|
exec minicom
|
|
----- end angelboot.opt -----
|
|
|
|
Then the kernel (and ramdisk if otherfile/otherbase lines above are
|
|
uncommented) would be loaded with:
|
|
|
|
angelboot -f angelboot.opt zImage
|
|
|
|
Here it is assumed that the board is connected to ttyS1 on your PC
|
|
and that minicom is preconfigured with /dev/ttyS1, 38400 baud, 8N1, no flow
|
|
control by default.
|
|
|
|
If any other bootloader is used, ensure it accomplish the same, especially
|
|
for r0/r1 register values before jumping into the kernel.
|
|
|
|
|
|
Supported peripherals:
|
|
- SA1100 LCD frame buffer (8/16bpp...sort of)
|
|
- on-board SMC 92C96 ethernet NIC
|
|
- SA1100 serial port
|
|
- flash memory access (MTD/JFFS)
|
|
- pcmcia
|
|
- touchscreen(ucb1200)
|
|
- ps/2 keyboard
|
|
- console on LCD screen
|
|
- serial ports (ttyS[0-2])
|
|
- ttyS0 is default for serial console
|
|
- Smart I/O (ADC, keypad, digital inputs, etc)
|
|
See http://www.applieddata.com/developers/linux for IOCTL documentation
|
|
and example user space code. ps/2 keybd is multiplexed through this driver
|
|
|
|
To do:
|
|
- UCB1200 audio with new ucb_generic layer
|
|
- everything else! :-)
|
|
|
|
Notes:
|
|
|
|
- The flash on board is divided into 3 partitions. mtd0 is where
|
|
the ADS boot ROM and zImage is stored. It's been marked as
|
|
read-only to keep you from blasting over the bootloader. :) mtd1 is
|
|
for the ramdisk.gz image. mtd2 is user flash space and can be
|
|
utilized for either JFFS or if you're feeling crazy, running ext2
|
|
on top of it. If you're not using the ADS bootloader, you're
|
|
welcome to blast over the mtd1 partition also.
|
|
|
|
- 16bpp mode requires a different cable than what ships with the board.
|
|
Contact ADS or look through the manual to wire your own. Currently,
|
|
if you compile with 16bit mode support and switch into a lower bpp
|
|
mode, the timing is off so the image is corrupted. This will be
|
|
fixed soon.
|
|
|
|
Any contribution can be sent to nico@fluxnic.net and will be greatly welcome!
|
|
|