sound/soc/tegra/tegra_pcm.h

   1 /*
   2  * tegra_pcm.h - Definitions for Tegra PCM driver
   3  *
   4  * Author: Stephen Warren <swarren@nvidia.com>
   5  * Copyright (C) 2010 - NVIDIA, Inc.
   6  *
   7  * Based on code copyright/by:
   8  *
   9  * Copyright (c) 2009-2010, NVIDIA Corporation.
  10  * Scott Peterson <speterson@nvidia.com>
  11  *
  12  * Copyright (C) 2010 Google, Inc.
  13  * Iliyan Malchev <malchev@google.com>
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * version 2 as published by the Free Software Foundation.
  18  *
  19  * This program is distributed in the hope that it will be useful, but
  20  * WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  22  * General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  27  * 02110-1301 USA
  28  *
  29  */
  30
  31 #ifndef __TEGRA_PCM_H__
  32 #define __TEGRA_PCM_H__
  33
  34 #include <mach/dma.h>
  35
  36 struct tegra_pcm_dma_params {
  37         unsigned long addr;
  38         unsigned long wrap;
  39         unsigned long width;
  40         unsigned long req_sel;
  41 };
  42
  43 struct tegra_runtime_data {
  44         struct snd_pcm_substream *substream;
  45         spinlock_t lock;
  46         int running;
  47         int dma_pos;
  48         int dma_pos_end;
  49         int period_index;
  50         int dma_req_idx;
  51         struct tegra_dma_req dma_req[2];
  52         struct tegra_dma_channel *dma_chan;
  53 };
  54
  55 #endif