Hello. On 01/25/2012 06:22 PM, Gupta, Ajay Kumar wrote:
As a next step to dma-engine based cppi4.1 driver implementation this RFC has the overview of changes in the musb driver. RFC on CPPI slave driver changes will follow next.
Overview of changes in the musb driver ======================================
1)Add a dma-engine.c file in the drivers/usb/musb folder 2)This file will host the current musb dma APIs and translates them to dmaengine APIs. 3)This will help to keep the changes in drivers/usb/musb/musb* files minimal and also to retain compatibility other DMA (Mentor etc.) drivers which are yet to be moved to drivers/dma 4)drivers/usb/musb/dma-engine.c, will wrap the dmaengine APIs to make existing musb APIs compatible. 5)drivers/usb/musb/dma-engine.c file will implement the filter functions and also implement .dma_controller_create (allocates & provides "dma_controller" object) and .dma_controller_delete 6)CPPI4.1 DMA specific queue and buffer management will be internal to slave CPPI DMA driver implementation.
You mean drivers/dma/ driver? I think you are forgotting that CPPI 4.1 MUSB has some registers controlling DMA/interrupts beside those of CPPI 4.1 controller and MUSB core itself. How do they fit in your scheme?
WBR, Sergei -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
