| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* dma.h: FRV DMA controller management |
| 2 | * |
| 3 | * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. |
| 4 | * Written by David Howells (dhowells@redhat.com) |
| 5 | * |
| 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. |
| 10 | */ |
| 11 | |
| 12 | #ifndef _ASM_DMA_H |
| 13 | #define _ASM_DMA_H |
| 14 | |
| 15 | //#define DMA_DEBUG 1 |
| 16 | |
| 17 | #include <linux/config.h> |
| 18 | #include <linux/interrupt.h> |
| 19 | |
| 20 | #undef MAX_DMA_CHANNELS /* don't use kernel/dma.c */ |
| 21 | |
| 22 | /* under 2.4 this is actually needed by the new bootmem allocator */ |
| 23 | #define MAX_DMA_ADDRESS PAGE_OFFSET |
| 24 | |
| 25 | /* |
| 26 | * FRV DMA controller management |
| 27 | */ |
| 28 | struct pt_regs; |
| 29 | |
| 30 | typedef irqreturn_t (*dma_irq_handler_t)(int dmachan, unsigned long cstr, void *data, |
| 31 | struct pt_regs *regs); |
| 32 | |
| 33 | extern void frv_dma_init(void); |
| 34 | |
| 35 | extern int frv_dma_open(const char *devname, |
| 36 | unsigned long dmamask, |
| 37 | int dmacap, |
| 38 | dma_irq_handler_t handler, |
| 39 | unsigned long irq_flags, |
| 40 | void *data); |
| 41 | |
| 42 | /* channels required */ |
| 43 | #define FRV_DMA_MASK_ANY ULONG_MAX /* any channel */ |
| 44 | |
| 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 */ |
| 49 | |
| 50 | extern void frv_dma_close(int dma); |
| 51 | |
| 52 | extern void frv_dma_config(int dma, unsigned long ccfr, unsigned long cctr, unsigned long apr); |
| 53 | |
| 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); |
| 57 | |
| 58 | extern void frv_dma_restart_circular(int dma, unsigned long six); |
| 59 | |
| 60 | extern void frv_dma_stop(int dma); |
| 61 | |
| 62 | extern int is_frv_dma_interrupting(int dma); |
| 63 | |
| 64 | extern void frv_dma_dump(int dma); |
| 65 | |
| 66 | extern void frv_dma_status_clear(int dma); |
| 67 | |
| 68 | #define FRV_DMA_NCHANS 8 |
| 69 | #define FRV_DMA_4CHANS 4 |
| 70 | #define FRV_DMA_8CHANS 8 |
| 71 | |
| 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 |
| 82 | |
| 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 |
| 92 | |
| 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 |
| 112 | |
| 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 */ |
| 119 | |
| 120 | /* |
| 121 | * required for PCI + MODULES |
| 122 | */ |
| 123 | #ifdef CONFIG_PCI |
| 124 | extern int isa_dma_bridge_buggy; |
| 125 | #else |
| 126 | #define isa_dma_bridge_buggy (0) |
| 127 | #endif |
| 128 | |
| 129 | #endif /* _ASM_DMA_H */ |