1 /* dma.h: FRV DMA controller management
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
17 #include <linux/config.h>
18 #include <linux/interrupt.h>
20 #undef MAX_DMA_CHANNELS /* don't use kernel/dma.c */
22 /* under 2.4 this is actually needed by the new bootmem allocator */
23 #define MAX_DMA_ADDRESS PAGE_OFFSET
26 * FRV DMA controller management
30 typedef irqreturn_t (*dma_irq_handler_t)(int dmachan, unsigned long cstr, void *data,
31 struct pt_regs *regs);
33 extern void frv_dma_init(void);
35 extern int frv_dma_open(const char *devname,
36 unsigned long dmamask,
38 dma_irq_handler_t handler,
39 unsigned long irq_flags,
42 /* channels required */
43 #define FRV_DMA_MASK_ANY ULONG_MAX /* any channel */
45 /* capabilities required */
46 #define FRV_DMA_CAP_DREQ 0x01 /* DMA request pin */
47 #define FRV_DMA_CAP_DACK 0x02 /* DMA ACK pin */
48 #define FRV_DMA_CAP_DONE 0x04 /* DMA done pin */
50 extern void frv_dma_close(int dma);
52 extern void frv_dma_config(int dma, unsigned long ccfr, unsigned long cctr, unsigned long apr);
54 extern void frv_dma_start(int dma,
55 unsigned long sba, unsigned long dba,
56 unsigned long pix, unsigned long six, unsigned long bcl);
58 extern void frv_dma_restart_circular(int dma, unsigned long six);
60 extern void frv_dma_stop(int dma);
62 extern int is_frv_dma_interrupting(int dma);
64 extern void frv_dma_dump(int dma);
66 extern void frv_dma_status_clear(int dma);
68 #define FRV_DMA_NCHANS 8
69 #define FRV_DMA_4CHANS 4
70 #define FRV_DMA_8CHANS 8
72 #define DMAC_CCFRx 0x00 /* channel configuration reg */
73 #define DMAC_CCFRx_CM_SHIFT 16
74 #define DMAC_CCFRx_CM_DA 0x00000000
75 #define DMAC_CCFRx_CM_SCA 0x00010000
76 #define DMAC_CCFRx_CM_DCA 0x00020000
77 #define DMAC_CCFRx_CM_2D 0x00030000
78 #define DMAC_CCFRx_ATS_SHIFT 8
79 #define DMAC_CCFRx_RS_INTERN 0x00000000
80 #define DMAC_CCFRx_RS_EXTERN 0x00000001
81 #define DMAC_CCFRx_RS_SHIFT 0
83 #define DMAC_CSTRx 0x08 /* channel status reg */
84 #define DMAC_CSTRx_FS 0x0000003f
85 #define DMAC_CSTRx_NE 0x00000100
86 #define DMAC_CSTRx_FED 0x00000200
87 #define DMAC_CSTRx_WER 0x00000800
88 #define DMAC_CSTRx_RER 0x00001000
89 #define DMAC_CSTRx_CE 0x00002000
90 #define DMAC_CSTRx_INT 0x00800000
91 #define DMAC_CSTRx_BUSY 0x80000000
93 #define DMAC_CCTRx 0x10 /* channel control reg */
94 #define DMAC_CCTRx_DSIZ_1 0x00000000
95 #define DMAC_CCTRx_DSIZ_2 0x00000001
96 #define DMAC_CCTRx_DSIZ_4 0x00000002
97 #define DMAC_CCTRx_DSIZ_32 0x00000005
98 #define DMAC_CCTRx_DAU_HOLD 0x00000000
99 #define DMAC_CCTRx_DAU_INC 0x00000010
100 #define DMAC_CCTRx_DAU_DEC 0x00000020
101 #define DMAC_CCTRx_SSIZ_1 0x00000000
102 #define DMAC_CCTRx_SSIZ_2 0x00000100
103 #define DMAC_CCTRx_SSIZ_4 0x00000200
104 #define DMAC_CCTRx_SSIZ_32 0x00000500
105 #define DMAC_CCTRx_SAU_HOLD 0x00000000
106 #define DMAC_CCTRx_SAU_INC 0x00001000
107 #define DMAC_CCTRx_SAU_DEC 0x00002000
108 #define DMAC_CCTRx_FC 0x08000000
109 #define DMAC_CCTRx_ICE 0x10000000
110 #define DMAC_CCTRx_IE 0x40000000
111 #define DMAC_CCTRx_ACT 0x80000000
113 #define DMAC_SBAx 0x18 /* source base address reg */
114 #define DMAC_DBAx 0x20 /* data base address reg */
115 #define DMAC_PIXx 0x28 /* primary index reg */
116 #define DMAC_SIXx 0x30 /* secondary index reg */
117 #define DMAC_BCLx 0x38 /* byte count limit reg */
118 #define DMAC_APRx 0x40 /* alternate pointer reg */
121 * required for PCI + MODULES
124 extern int isa_dma_bridge_buggy;
126 #define isa_dma_bridge_buggy (0)
129 #endif /* _ASM_DMA_H */