target/linux/ubicom32/files/arch/ubicom32/include/asm/pcm_tio.h

   1 /*
   2  * arch/ubicom32/include/asm/pcm_tio.h
   3  *   Ubicom32 architecture PCM TIO definitions.
   4  *
   5  * (C) Copyright 2009, Ubicom, Inc.
   6  *
   7  * This file is part of the Ubicom32 Linux Kernel Port.
   8  *
   9  * The Ubicom32 Linux Kernel Port is free software: you can redistribute
  10  * it and/or modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation, either version 2 of the
  12  * License, or (at your option) any later version.
  13  *
  14  * The Ubicom32 Linux Kernel Port is distributed in the hope that it
  15  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  16  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  17  * the GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with the Ubicom32 Linux Kernel Port.  If not,
  21  * see <http://www.gnu.org/licenses/>.
  22  */
  23 #ifndef _ASM_UBICOM32_PCM_TIO_H
  24 #define _ASM_UBICOM32_PCM_TIO_H
  25
  26 #include <asm/devtree.h>
  27
  28 #define PCM_TIO_REGS_VERSION    2
  29 struct pcm_tio_regs {
  30         /*
  31          * set this value to 1 to reload the parameters and restart the HRT
  32          */
  33         u32_t           reload;
  34
  35         /*
  36          * Pointers to the input and output buffers
  37          */
  38         void            *input_buf;
  39         void            *output_buf;
  40
  41         /*
  42          * Buffer size (see pcm_hrt.S for constraints)
  43          */
  44         u32_t           buffer_size;
  45
  46         /*
  47          * Current cycle.  This variable increases every time half the buffer
  48          * is consumed.
  49          */
  50         u32_t           cycle;
  51
  52         /*
  53          * Fields below this line are not accessed by the HRT.  They are purely
  54          * informational for the user of this TIO.
  55          */
  56
  57         /*
  58          * Version of this structure
  59          */
  60         u32_t           version;
  61
  62         /*
  63          * Number of channels supported
  64          */
  65         u32_t           channels;
  66
  67         /*
  68          * Maximum buffer size
  69          */
  70         u32_t           max_buffer_size;
  71 };
  72
  73 /*
  74  * Our device node
  75  */
  76 #define PCM_TIO_NODE_VERSION    1
  77 struct pcm_tio_node {
  78         struct devtree_node     dn;
  79         u32_t                   version;
  80         struct pcm_tio_regs     *regs;
  81 };
  82
  83 #endif
  84