Pharaoh . wrote: > On 6/27/07, Clemens Ladisch <cladisch@xxxxxxxxxxxx> wrote: > > SNDRV_DMA_TYPE_CONTINUOUS is for a buffer that cannot be accessed > > over DMA. > > > > What kind of bus does your hardware use, and how would you > > allocate memory for it? > > Continuous buffers unrelated to the bus type can be allocated using > SNDRV_DMA_TYPE_CONTINUOUS right? I am referring a standard driver from > omap source tree, and the buffer allocation functions I have copied > from there and they should be same for the range of OMAPs since the > dma handling is same for them. I don't know anything about OMAP. If the processor doesn't use a MMU, then the memory addresses as seen by the CPU are the same as those used by a device using DMA. In that case, you could use SNDRV_DMA_TYPE_CONTINUOUS and the correct address would be available as runtime->dma_area. HTH Clemens _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
