arch/sh/include/asm/dmaengine.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 ASM_DMAENGINE_H
  11 #define ASM_DMAENGINE_H
  12
  13 #include <asm/dma-register.h>
  14
  15 #define SH_DMAC_MAX_CHANNELS    6
  16
  17 enum sh_dmae_slave_chan_id {
  18         SHDMA_SLAVE_SCIF0_TX,
  19         SHDMA_SLAVE_SCIF0_RX,
  20         SHDMA_SLAVE_SCIF1_TX,
  21         SHDMA_SLAVE_SCIF1_RX,
  22         SHDMA_SLAVE_SCIF2_TX,
  23         SHDMA_SLAVE_SCIF2_RX,
  24         SHDMA_SLAVE_SCIF3_TX,
  25         SHDMA_SLAVE_SCIF3_RX,
  26         SHDMA_SLAVE_SCIF4_TX,
  27         SHDMA_SLAVE_SCIF4_RX,
  28         SHDMA_SLAVE_SCIF5_TX,
  29         SHDMA_SLAVE_SCIF5_RX,
  30         SHDMA_SLAVE_SIUA_TX,
  31         SHDMA_SLAVE_SIUA_RX,
  32         SHDMA_SLAVE_SIUB_TX,
  33         SHDMA_SLAVE_SIUB_RX,
  34         SHDMA_SLAVE_NUMBER,     /* Must stay last */
  35 };
  36
  37 struct sh_dmae_slave_config {
  38         enum sh_dmae_slave_chan_id      slave_id;
  39         dma_addr_t                      addr;
  40         u32                             chcr;
  41         char                            mid_rid;
  42 };
  43
  44 struct sh_dmae_channel {
  45         unsigned int    offset;
  46         unsigned int    dmars;
  47         unsigned int    dmars_bit;
  48 };
  49
  50 struct sh_dmae_pdata {
  51         struct sh_dmae_slave_config *slave;
  52         int slave_num;
  53         struct sh_dmae_channel *channel;
  54         int channel_num;
  55         unsigned int ts_low_shift;
  56         unsigned int ts_low_mask;
  57         unsigned int ts_high_shift;
  58         unsigned int ts_high_mask;
  59         unsigned int *ts_shift;
  60         int ts_shift_num;
  61         u16 dmaor_init;
  62 };
  63
  64 struct device;
  65
  66 /* Used by slave DMA clients to request DMA to/from a specific peripheral */
  67 struct sh_dmae_slave {
  68         enum sh_dmae_slave_chan_id      slave_id; /* Set by the platform */
  69         struct device                   *dma_dev; /* Set by the platform */
  70         struct sh_dmae_slave_config     *config;  /* Set by the driver */
  71 };
  72
  73 #endif