[RFC/Patch] ppc4xx_dma.c

[akuster]

While working on an ocp ide driver using the DMA channel with
mtdcr/mfdcr calls , it became clear to me that some changes need to
occur in the ppc4xx_dma.c code.

1) I moved the scatter/gather code used by the 440GP, 405gp, np405l and
np405h to a separate file (ppc4xx_sgdma.c) and is now built when one of
those cpus are configured.

2) I moved the inline api out of /asm-ppc/ppc4xx_dma.h to either
ppc4xx_sgdam.c or ppc4xx_dma.c

3) I needed to add a few more api's for the stbx25xxx and am in the
process of determining if those need to go into a ppc4xxx_stbdma.c file.

int clr_dma_status(unsigned int dmanr)

int map_dma_port(unsigned int dmanr, unsigned int ocp_dma,short dma_chan)

int disable_dma_port(unsigned int dmanr, unsigned int ocp_dma,short
dma_chan)

and possible more to follow

The common API's will stay in /kernel/ppc4xx_dma.c and the common
defines in asm-ppc/ppc4xx_dma.h

armin


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