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<font size="+1">Hi EveryOne!<br>
<br>
This is first time I send a letter to everyone. If I make mistake,
please free to correct me. :)<br>
<br>
I'm trying to write the first driver which is concerned with DMA. I'm
reading dmatest.c and have some confused problem. Oh! No! I have many
problem..:D<br>
MPC8349's DMA controller like ISA controller but with more features? I
want to mean that MPC8349E's DMA controller will send -MEMR, -MEMW,
-IOR, -IOW ?.<br>
So in DMA APIs such as dma_addr_t dma_map_single(struct device *dev,
void *cpu_addr, size_t size, enum dma_data_direction direction)<br>
<br>
*dev will pointer to DMA controller or to peripheral device(FPGA, ISA
device)? From dmatest.c , *dev seem to pointer to a channel of DMA
controller. <br>
The channel is connected to a peripheral device. So calling the API,
DMA controller will be able to access memory from cpu_addr, and
peripheral device does too?<br>
<br>
Look struct dma_async_tx_descriptor *(*device_prep_dma_memcpy)(struct
dma_chan *chan, dma_addr_t dest, dma_addr_t src,<br>
size_t len, unsigned long flags);<br>
I want to DMA from device to memory. So how to I can get address of
peripheral device ?<br>
<br>
Regards!</font>
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