include/linux/sh_dma.h

   1 /*
   2  * Header for the new SH dmaengine driver
   3  *
   4  * Copyright (C) 2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #ifndef SH_DMA_H
  11 #define SH_DMA_H
  12
  13 #include <linux/list.h>
  14 #include <linux/dmaengine.h>
  15
  16 /* Used by slave DMA clients to request DMA to/from a specific peripheral */
  17 struct sh_dmae_slave {
  18         unsigned int                    slave_id; /* Set by the platform */
  19         struct device                   *dma_dev; /* Set by the platform */
  20         const struct sh_dmae_slave_config       *config;  /* Set by the driver */
  21 };
  22
  23 struct sh_dmae_regs {
  24         u32 sar; /* SAR / source address */
  25         u32 dar; /* DAR / destination address */
  26         u32 tcr; /* TCR / transfer count */
  27 };
  28
  29 struct sh_desc {
  30         struct sh_dmae_regs hw;
  31         struct list_head node;
  32         struct dma_async_tx_descriptor async_tx;
  33         enum dma_transfer_direction direction;
  34         dma_cookie_t cookie;
  35         size_t partial;
  36         int chunks;
  37         int mark;
  38 };
  39
  40 struct sh_dmae_slave_config {
  41         unsigned int                    slave_id;
  42         dma_addr_t                      addr;
  43         u32                             chcr;
  44         char                            mid_rid;
  45 };
  46
  47 struct sh_dmae_channel {
  48         unsigned int    offset;
  49         unsigned int    dmars;
  50         unsigned int    dmars_bit;
  51         unsigned int    chclr_offset;
  52 };
  53
  54 struct sh_dmae_pdata {
  55         const struct sh_dmae_slave_config *slave;
  56         int slave_num;
  57         const struct sh_dmae_channel *channel;
  58         int channel_num;
  59         unsigned int ts_low_shift;
  60         unsigned int ts_low_mask;
  61         unsigned int ts_high_shift;
  62         unsigned int ts_high_mask;
  63         const unsigned int *ts_shift;
  64         int ts_shift_num;
  65         u16 dmaor_init;
  66         unsigned int chcr_offset;
  67         u32 chcr_ie_bit;
  68
  69         unsigned int dmaor_is_32bit:1;
  70         unsigned int needs_tend_set:1;
  71         unsigned int no_dmars:1;
  72         unsigned int chclr_present:1;
  73         unsigned int slave_only:1;
  74 };
  75
  76 /* DMA register */
  77 #define SAR     0x00
  78 #define DAR     0x04
  79 #define TCR     0x08
  80 #define CHCR    0x0C
  81 #define DMAOR   0x40
  82
  83 #define TEND    0x18 /* USB-DMAC */
  84
  85 /* DMAOR definitions */
  86 #define DMAOR_AE        0x00000004
  87 #define DMAOR_NMIF      0x00000002
  88 #define DMAOR_DME       0x00000001
  89
  90 /* Definitions for the SuperH DMAC */
  91 #define REQ_L   0x00000000
  92 #define REQ_E   0x00080000
  93 #define RACK_H  0x00000000
  94 #define RACK_L  0x00040000
  95 #define ACK_R   0x00000000
  96 #define ACK_W   0x00020000
  97 #define ACK_H   0x00000000
  98 #define ACK_L   0x00010000
  99 #define DM_INC  0x00004000
 100 #define DM_DEC  0x00008000
 101 #define DM_FIX  0x0000c000
 102 #define SM_INC  0x00001000
 103 #define SM_DEC  0x00002000
 104 #define SM_FIX  0x00003000
 105 #define RS_IN   0x00000200
 106 #define RS_OUT  0x00000300
 107 #define TS_BLK  0x00000040
 108 #define TM_BUR  0x00000020
 109 #define CHCR_DE 0x00000001
 110 #define CHCR_TE 0x00000002
 111 #define CHCR_IE 0x00000004
 112
 113 #endif