now I can understand that the file of the fsldma.c is the driver of the DMA engine that contains also a test the DMA. I noticed that it contains 2 module init functions: subsys_initcall(of_fsl_dma_chan_init); subsys_initcall(of_fsl_dma_init);
Also it contains two probe functions: static int __devinit of_fsl_dma_chan_probe(struct of_device *dev,const struct of_device_id *match) static int __devinit of_fsl_dma_probe(struct of_device *dev,const struct of_device_id *match) How can i make these 2 probe functions work, i also noticed that fsldma.c cant be built as a module either it is built-in or not built. is there something i should write in the command line to let fsldma works & tests the DMA engine i have on my board. also i want to know the module "dmatest",what does it test exactly? can it test the DMA engine or not? thanks for your help wael showair wrote: > > Hi All, > i have an evaluation board with MPC8555 processor. > linux kernel 2.6.27 > i have read the Documentation of my board, i found that it contains DMA > engine. > i know that there fsldma.c & fsldma.h > all my target is that i want to test the DMA on my board. > i want to transfer data from source to destination & i imagine that the > DMA will raise an interrupt after it finishes the transfer. > > so i believe there must be some APIs related to the DMA engine which do > the following: > 1. initialize the DMA by determining the src & dest addresses. Also > determines which channel to use. > 2. register an interrupt handler for the DMA interrupt line. > 3. fire the DMA. > > where can i find these APIs, or i m missing something? > thanks in advance for ur help > -- View this message in context: http://www.nabble.com/using-dma-engine-on-MPC8555-processor-tp21683674p21703549.html Sent from the linuxppc-dev mailing list archive at Nabble.com. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
