It seems the current values for the Destination/Source Address Mode (SM/DM)
fields in the SHDMA DMA Channel Control Register:
#define DM_FIX 0x0000c000
#define SM_FIX 0x00003000
are not correct for all parts, according to the documentation.
While on sh7724, A1 (r8a7740), AG5 (sh73a0/r8a73a0), and APE6 (r8a73a4)
both the '00' and '11' bit combinations indicate a fixed destination or source
address, '11' is marked as "Setting Prohibited" on sh7750, sh7753, sh7760,
and R-Car Gen2.
I don't know about other parts.
RZ/A1H and R-Car Gen1 use different DMA controller blocks.
At least with QSPI on R-Car M2, '11' does seem to work, though.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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