LXR linux/include/linux/sh

   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 */
  17struct 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
  23struct sh_dmae_regs {
  24        u32 sar; /* SAR / source address */
  25        u32 dar; /* DAR / destination address */
  26        u32 tcr; /* TCR / transfer count */
  27};
  28
  29struct sh_desc {
  30        struct sh_dmae_regs hw;
  31        struct list_head node;
  32        struct dma_async_tx_descriptor async_tx;
  33        enum dma_data_direction direction;
  34        dma_cookie_t cookie;
  35        size_t partial;
  36        int chunks;
  37        int mark;
  38};
  39
  40struct sh_dmae_slave_config {
  41        unsigned int                    slave_id;
  42        dma_addr_t                      addr;
  43        u32                             chcr;
  44        char                            mid_rid;
  45};
  46
  47struct sh_dmae_channel {
  48        unsigned int    offset;
  49        unsigned int    dmars;
  50        unsigned int    dmars_bit;
  51};
  52
  53struct sh_dmae_pdata {
  54        const struct sh_dmae_slave_config *slave;
  55        int slave_num;
  56        const struct sh_dmae_channel *channel;
  57        int channel_num;
  58        unsigned int ts_low_shift;
  59        unsigned int ts_low_mask;
  60        unsigned int ts_high_shift;
  61        unsigned int ts_high_mask;
  62        const unsigned int *ts_shift;
  63        int ts_shift_num;
  64        u16 dmaor_init;
  65        unsigned int chcr_offset;
  66        u32 chcr_ie_bit;
  67
  68        unsigned int dmaor_is_32bit:1;
  69        unsigned int needs_tend_set:1;
  70        unsigned int no_dmars:1;
  71};
  72
  73/* DMA register */
  74#define SAR     0x00
  75#define DAR     0x04
  76#define TCR     0x08
  77#define CHCR    0x0C
  78#define DMAOR   0x40
  79
  80#define TEND    0x18 /* USB-DMAC */
  81
  82/* DMAOR definitions */
  83#define DMAOR_AE        0x00000004
  84#define DMAOR_NMIF      0x00000002
  85#define DMAOR_DME       0x00000001
  86
  87/* Definitions for the SuperH DMAC */
  88#define REQ_L   0x00000000
  89#define REQ_E   0x00080000
  90#define RACK_H  0x00000000
  91#define RACK_L  0x00040000
  92#define ACK_R   0x00000000
  93#define ACK_W   0x00020000
  94#define ACK_H   0x00000000
  95#define ACK_L   0x00010000
  96#define DM_INC  0x00004000
  97#define DM_DEC  0x00008000
  98#define DM_FIX  0x0000c000
  99#define SM_INC  0x00001000
 100#define SM_DEC  0x00002000
 101#define SM_FIX  0x00003000
 102#define RS_IN   0x00000200
 103#define RS_OUT  0x00000300
 104#define TS_BLK  0x00000040
 105#define TM_BUR  0x00000020
 106#define CHCR_DE 0x00000001
 107#define CHCR_TE 0x00000002
 108#define CHCR_IE 0x00000004
 109
 110#endif
 111