linux/Documentation/arm/SA1100/GraphicsClient
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   1ADS GraphicsClient Plus Single Board Computer
   2
   3For more details, contact Applied Data Systems or see
   4http://www.applieddata.net/products.html
   5
   6The original Linux support for this product has been provided by 
   7Nicolas Pitre <nico@fluxnic.net>. Continued development work by
   8Woojung Huh <whuh@applieddata.net>
   9
  10It's currently possible to mount a root filesystem via NFS providing a
  11complete Linux environment.  Otherwise a ramdisk image may be used.  The
  12board supports MTD/JFFS, so you could also mount something on there.
  13
  14Use 'make graphicsclient_config' before any 'make config'.  This will set up
  15defaults for GraphicsClient Plus support.
  16
  17The kernel zImage is linked to be loaded and executed at 0xc0200000.  
  18Also the following registers should have the specified values upon entry:
  19
  20        r0 = 0
  21        r1 = 29 (this is the GraphicsClient architecture number)
  22
  23Linux can  be used with the ADS BootLoader that ships with the
  24newer rev boards. See their documentation on how to load Linux.
  25Angel is not available for the GraphicsClient Plus AFAIK.
  26
  27There is a  board known as just the GraphicsClient that ADS used to
  28produce but has end of lifed. This code will not work on the older
  29board with the ADS bootloader, but should still work with Angel,
  30as outlined below.  In any case, if you're planning on deploying
  31something en masse, you should probably get the newer board.
  32
  33If using Angel on the older boards, here is a typical angel.opt option file
  34if the kernel is loaded through the Angel Debug Monitor:
  35
  36----- begin angelboot.opt -----
  37base 0xc0200000
  38entry 0xc0200000
  39r0 0x00000000
  40r1 0x0000001d
  41device /dev/ttyS1
  42options "38400 8N1"
  43baud 115200
  44#otherfile ramdisk.gz
  45#otherbase 0xc0800000
  46exec minicom
  47----- end angelboot.opt -----
  48
  49Then the kernel (and ramdisk if otherfile/otherbase lines above are
  50uncommented) would be loaded with:
  51
  52        angelboot -f angelboot.opt zImage
  53
  54Here it is assumed that the board is connected to ttyS1 on your PC
  55and that minicom is preconfigured with /dev/ttyS1, 38400 baud, 8N1, no flow
  56control by default.
  57
  58If any other bootloader is used, ensure it accomplish the same, especially
  59for r0/r1 register values before jumping into the kernel.
  60
  61
  62Supported peripherals:
  63- SA1100 LCD frame buffer (8/16bpp...sort of)
  64- on-board SMC 92C96 ethernet NIC
  65- SA1100 serial port
  66- flash memory access (MTD/JFFS)
  67- pcmcia
  68- touchscreen(ucb1200)
  69- ps/2 keyboard
  70- console on LCD screen
  71- serial ports (ttyS[0-2])
  72  - ttyS0 is default for serial console
  73- Smart I/O (ADC, keypad, digital inputs, etc)
  74  See http://www.eurotech-inc.com/linux-sbc.asp for IOCTL documentation
  75  and example user space code. ps/2 keybd is multiplexed through this driver
  76
  77To do:
  78- UCB1200 audio with new ucb_generic layer
  79- everything else!  :-)
  80
  81Notes:
  82
  83- The flash on board is divided into 3 partitions.  mtd0 is where
  84  the ADS boot ROM and zImage is stored.  It's been marked as
  85  read-only to keep you from blasting over the bootloader. :)  mtd1 is
  86  for the ramdisk.gz image.  mtd2 is user flash space and can be
  87  utilized for either JFFS or if you're feeling crazy, running ext2
  88  on top of it. If you're not using the ADS bootloader, you're
  89  welcome to blast over the mtd1 partition also.
  90
  91- 16bpp mode requires a different cable than what ships with the board.
  92  Contact ADS or look through the manual to wire your own. Currently,
  93  if you compile with 16bit mode support and switch into a lower bpp
  94  mode, the timing is off so the image is corrupted.  This will be
  95  fixed soon.
  96
  97Any contribution can be sent to nico@fluxnic.net and will be greatly welcome!
  98
  99