xref: /linux/arch/sh/drivers/dma/Kconfig (revision 662fa3d6099374c4615bf64d06895e3573b935b2) 
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_SH7750  || CPU_SUBTYPE_SH7751  || \
32		       CPU_SUBTYPE_SH7750S || CPU_SUBTYPE_SH7091
33	default "8" if CPU_SUBTYPE_SH7750R || CPU_SUBTYPE_SH7751R || \
34		       CPU_SUBTYPE_SH7760
35	default "12" if CPU_SUBTYPE_SH7723 || CPU_SUBTYPE_SH7780  || \
36			CPU_SUBTYPE_SH7785 || CPU_SUBTYPE_SH7724
37	default "6"
38	help
39	  This allows you to specify the number of channels that the on-chip
40	  DMAC supports. This will be 4 for SH7750/SH7751/Sh7750S/SH7091 and 8 for the
41	  SH7750R/SH7751R/SH7760, 12 for the SH7723/SH7780/SH7785/SH7724, default is 6.
42
43config SH_DMABRG
44	bool "SH7760 DMABRG support"
45	depends on CPU_SUBTYPE_SH7760
46	help
47	  The DMABRG does data transfers from main memory to Audio/USB units
48	  of the SH7760.
49	  Say Y if you want to use Audio/USB DMA on your SH7760 board.
50
51config PVR2_DMA
52	tristate "PowerVR 2 DMAC support"
53	depends on SH_DREAMCAST && SH_DMA
54	help
55	  Selecting this will enable support for the PVR2 DMA controller.
56	  As this chains off of the on-chip DMAC, that must also be
57	  enabled by default.
58
59	  This is primarily used by the pvr2fb framebuffer driver for
60	  certain optimizations, but is not necessary for functionality.
61
62	  If in doubt, say N.
63
64config G2_DMA
65	tristate "G2 Bus DMA support"
66	depends on SH_DREAMCAST && SH_DMA_API
67	help
68	  This enables support for the DMA controller for the Dreamcast's
69	  G2 bus. Drivers that want this will generally enable this on
70	  their own.
71
72	  If in doubt, say N.
73
74endmenu
75