LXR linux/sound/soc/tegra/tegra

   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
  36struct tegra_pcm_dma_params {
  37        unsigned long addr;
  38        unsigned long wrap;
  39        unsigned long width;
  40        unsigned long req_sel;
  41};
  42
  43struct 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
  56