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1menu "DMA support"
2
3config SH_DMA_API
4 bool
5
6config SH_DMA
7 bool "SuperH on-chip DMA controller (DMAC) support"
8 depends on CPU_SH3 || CPU_SH4
9 select SH_DMA_API
10 default n
11
12config SH_DMA_IRQ_MULTI
13 bool
14 depends on SH_DMA
15 default y if CPU_SUBTYPE_SH7750 || CPU_SUBTYPE_SH7751 || \
16 CPU_SUBTYPE_SH7750S || CPU_SUBTYPE_SH7750R || \
17 CPU_SUBTYPE_SH7751R || CPU_SUBTYPE_SH7091 || \
18 CPU_SUBTYPE_SH7763 || CPU_SUBTYPE_SH7764 || \
19 CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785
20
21config NR_ONCHIP_DMA_CHANNELS
22 int
23 depends on SH_DMA
24 default "4" if CPU_SUBTYPE_SH7750 || CPU_SUBTYPE_SH7751 || \
25 CPU_SUBTYPE_SH7750S || CPU_SUBTYPE_SH7091
26 default "8" if CPU_SUBTYPE_SH7750R || CPU_SUBTYPE_SH7751R || \
27 CPU_SUBTYPE_SH7760
28 default "12" if CPU_SUBTYPE_SH7723 || CPU_SUBTYPE_SH7780 || \
29 CPU_SUBTYPE_SH7785
30 default "6"
31 help
32 This allows you to specify the number of channels that the on-chip
33 DMAC supports. This will be 4 for SH7091/SH7750/SH7751 and 8 for the
34 SH7750R/SH7751R.
35
36config NR_DMA_CHANNELS_BOOL
37 depends on SH_DMA
38 bool "Override default number of maximum DMA channels"
39 help
40 This allows you to forcibly update the maximum number of supported
41 DMA channels for a given board. If this is unset, this will default
42 to the number of channels that the on-chip DMAC has.
43
44config NR_DMA_CHANNELS
45 int "Maximum number of DMA channels"
46 depends on SH_DMA && NR_DMA_CHANNELS_BOOL
47 default NR_ONCHIP_DMA_CHANNELS
48 help
49 This allows you to specify the maximum number of DMA channels to
50 support. Setting this to a higher value allows for cascading DMACs
51 with additional channels.
52
53config SH_DMABRG
54 bool "SH7760 DMABRG support"
55 depends on CPU_SUBTYPE_SH7760
56 help
57 The DMABRG does data transfers from main memory to Audio/USB units
58 of the SH7760.
59 Say Y if you want to use Audio/USB DMA on your SH7760 board.
60
61config PVR2_DMA
62 tristate "PowerVR 2 DMAC support"
63 depends on SH_DREAMCAST && SH_DMA
64 help
65 Selecting this will enable support for the PVR2 DMA controller.
66 As this chains off of the on-chip DMAC, that must also be
67 enabled by default.
68
69 This is primarily used by the pvr2fb framebuffer driver for
70 certain optimizations, but is not necessary for functionality.
71
72 If in doubt, say N.
73
74config G2_DMA
75 tristate "G2 Bus DMA support"
76 depends on SH_DREAMCAST
77 select SH_DMA_API
78 help
79 This enables support for the DMA controller for the Dreamcast's
80 G2 bus. Drivers that want this will generally enable this on
81 their own.
82
83 If in doubt, say N.
84
85endmenu