* 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. Tony -- 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
