arch/sh/drivers/dma/dma-sh.h

   1 /*
   2  * arch/sh/drivers/dma/dma-sh.h
   3  *
   4  * Copyright (C) 2000  Takashi YOSHII
   5  * Copyright (C) 2003  Paul Mundt
   6  *
   7  * This file is subject to the terms and conditions of the GNU General Public
   8  * License.  See the file "COPYING" in the main directory of this archive
   9  * for more details.
  10  */
  11 #ifndef __DMA_SH_H
  12 #define __DMA_SH_H
  13
  14 #include <asm/cpu/dma.h>
  15
  16 /* Definitions for the SuperH DMAC */
  17 #define REQ_L   0x00000000
  18 #define REQ_E   0x00080000
  19 #define RACK_H  0x00000000
  20 #define RACK_L  0x00040000
  21 #define ACK_R   0x00000000
  22 #define ACK_W   0x00020000
  23 #define ACK_H   0x00000000
  24 #define ACK_L   0x00010000
  25 #define DM_INC  0x00004000
  26 #define DM_DEC  0x00008000
  27 #define SM_INC  0x00001000
  28 #define SM_DEC  0x00002000
  29 #define RS_IN   0x00000200
  30 #define RS_OUT  0x00000300
  31 #define TS_BLK  0x00000040
  32 #define CHCR_DE 0x00000001
  33 #define CHCR_TE 0x00000002
  34 #define CHCR_IE 0x00000004
  35
  36 /* DMAOR definitions */
  37 #define DMAOR_AE        0x00000004
  38 #define DMAOR_NMIF      0x00000002
  39 #define DMAOR_DME       0x00000001
  40
  41 /*
  42  * Define the default configuration for dual address memory-memory transfer.
  43  * The 0x400 value represents auto-request, external->external.
  44  */
  45 #define RS_DUAL (DM_INC | SM_INC | 0x400 | TS_32)
  46
  47 #define MAX_DMAC_CHANNELS       (CONFIG_NR_ONCHIP_DMA_CHANNELS)
  48
  49 /*
  50  * Subtypes that have fewer channels than this simply need to change
  51  * CONFIG_NR_ONCHIP_DMA_CHANNELS. Likewise, subtypes with a larger number
  52  * of channels should expand on this.
  53  *
  54  * For most subtypes we can easily figure these values out with some
  55  * basic calculation, unfortunately on other subtypes these are more
  56  * scattered, so we just leave it unrolled for simplicity.
  57  */
  58 #define SAR     ((unsigned long[]){SH_DMAC_BASE + 0x00, SH_DMAC_BASE + 0x10, \
  59                                    SH_DMAC_BASE + 0x20, SH_DMAC_BASE + 0x30, \
  60                                    SH_DMAC_BASE + 0x50, SH_DMAC_BASE + 0x60})
  61 #define DAR     ((unsigned long[]){SH_DMAC_BASE + 0x04, SH_DMAC_BASE + 0x14, \
  62                                    SH_DMAC_BASE + 0x24, SH_DMAC_BASE + 0x34, \
  63                                    SH_DMAC_BASE + 0x54, SH_DMAC_BASE + 0x64})
  64 #define DMATCR  ((unsigned long[]){SH_DMAC_BASE + 0x08, SH_DMAC_BASE + 0x18, \
  65                                    SH_DMAC_BASE + 0x28, SH_DMAC_BASE + 0x38, \
  66                                    SH_DMAC_BASE + 0x58, SH_DMAC_BASE + 0x68})
  67 #define CHCR    ((unsigned long[]){SH_DMAC_BASE + 0x0c, SH_DMAC_BASE + 0x1c, \
  68                                    SH_DMAC_BASE + 0x2c, SH_DMAC_BASE + 0x3c, \
  69                                    SH_DMAC_BASE + 0x5c, SH_DMAC_BASE + 0x6c})
  70
  71 #define DMAOR   (SH_DMAC_BASE + 0x40)
  72
  73 #endif /* __DMA_SH_H */
  74