tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1# SPDX-License-Identifier: GPL-2.0
2menu "DMA support"
3
4
5config SH_DMA
6 bool "SuperH on-chip DMA controller (DMAC) support"
7 depends on CPU_SH3 || CPU_SH4
8 default n
9
10config SH_DMA_IRQ_MULTI
11 bool
12 depends on SH_DMA
13 default y if CPU_SUBTYPE_SH7750 || CPU_SUBTYPE_SH7751 || \
14 CPU_SUBTYPE_SH7750S || CPU_SUBTYPE_SH7750R || \
15 CPU_SUBTYPE_SH7751R || CPU_SUBTYPE_SH7091 || \
16 CPU_SUBTYPE_SH7763 || CPU_SUBTYPE_SH7780 || \
17 CPU_SUBTYPE_SH7785 || CPU_SUBTYPE_SH7760
18
19config SH_DMA_API
20 depends on SH_DMA
21 bool "SuperH DMA API support"
22 default n
23 help
24 SH_DMA_API always enabled DMA API of used SuperH.
25 If you want to use DMA ENGINE, you must not enable this.
26 Please enable DMA_ENGINE and SH_DMAE.
27
28config NR_ONCHIP_DMA_CHANNELS
29 int
30 depends on SH_DMA
31 default "4" if CPU_SUBTYPE_SH7709 || CPU_SUBTYPE_SH7750 || \
32 CPU_SUBTYPE_SH7750S || CPU_SUBTYPE_SH7751 || \
33 CPU_SUBTYPE_SH7091
34 default "8" if CPU_SUBTYPE_SH7750R || CPU_SUBTYPE_SH7751R || \
35 CPU_SUBTYPE_SH7760
36 default "12" if CPU_SUBTYPE_SH7723 || CPU_SUBTYPE_SH7724 || \
37 CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785
38 default "6"
39 help
40 This allows you to specify the number of channels that the on-chip
41 DMAC supports. This will be 4 for SH7709/SH7750/SH7750S/SH7751/SH7091,
42 8 for SH7750R/SH7751R/SH7760, and 12 for SH7723/SH7724/SH7780/SH7785.
43 Default is 6.
44
45config SH_DMABRG
46 bool "SH7760 DMABRG support"
47 depends on CPU_SUBTYPE_SH7760
48 help
49 The DMABRG does data transfers from main memory to Audio/USB units
50 of the SH7760.
51 Say Y if you want to use Audio/USB DMA on your SH7760 board.
52
53config PVR2_DMA
54 tristate "PowerVR 2 DMAC support"
55 depends on SH_DREAMCAST && SH_DMA
56 help
57 Selecting this will enable support for the PVR2 DMA controller.
58 As this chains off of the on-chip DMAC, that must also be
59 enabled by default.
60
61 This is primarily used by the pvr2fb framebuffer driver for
62 certain optimizations, but is not necessary for functionality.
63
64 If in doubt, say N.
65
66config G2_DMA
67 tristate "G2 Bus DMA support"
68 depends on SH_DREAMCAST && SH_DMA_API
69 help
70 This enables support for the DMA controller for the Dreamcast's
71 G2 bus. Drivers that want this will generally enable this on
72 their own.
73
74 If in doubt, say N.
75
76endmenu