On 11/03/2011 03:25 PM, Tony Lindgren wrote: > * James <angweiyang@xxxxxxxxx> [111023 18:13]: >> Dear all, >> >> I'm learning embedded linux development and need help on my task. >> >> I'm trying to communicate with a FPGA via the GPMC bus on my Overo FE >> board and need assistance with writing a simple device driver & test >> application that uses the GPMC bus to read & write a WORD size data >> and also a BLOCK of WORD data to the FPGA. >> >> The FPGA-OMAP3530 will be use synchronous read/write over the 16-bit >> datapath and CS 6. >> The GPMC bus is shared with an Ethernet chip and NAND chip as per >> Gumstix COM + TOBI/Chestnut design and these standard devices must >> still work as per norm. >> >> I've been searching via GMANE for similar questions but some are >> pointing to non-existence archives. >> >> I believe I have to develop a kernel device driver to register the >> FPGA and from which will expose a device node for the test >> application. >> or is there a generic GPMC driver that does it? >> >> Can someone share with me similar layout and code so that I can base >> my learning from a starting point? >> >> Many thanks in adv. > > Please take a look at the various arch/arm/mach-omap2/gpmc-*.c files. > The biggest pain is to get the timings right. Also take a look at: https://github.com/balister/linux-omap-philip/commits/e100-2.6.38-2 Philip -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
