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/*
* intel_alsa_ssp_hw_interface.h
*
* Copyright (C) 2010 Intel Corp
* Authors: Selma Bensaid <selma.bensaid@intel.com>
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#ifndef _INTEL_ALSA_SSP_HW_INTERFACE_H
#define _INTEL_ALSA_SSP_HW_INTERFACE_H
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <sound/core.h>
#define INTEL_ALSA_SSP_PLAYBACK 0
#define INTEL_ALSA_SSP_CAPTURE 1
#define INTEL_ALSA_SSP_SND_CARD_MAX_DEVICES 2
#define INTEL_ALSA_BT_DEVICE_ID 0
#define INTEL_ALSA_FM_DEVICE_ID 1
enum intel_alsa_ssp_stream_status {
INTEL_ALSA_SSP_STREAM_INIT = 0,
INTEL_ALSA_SSP_STREAM_STARTED,
INTEL_ALSA_SSP_STREAM_RUNNING,
INTEL_ALSA_SSP_STREAM_PAUSED,
INTEL_ALSA_SSP_STREAM_DROPPED,
};
enum intel_alsa_ssp_control_id {
INTEL_ALSA_SSP_CTRL_SND_OPEN = 0x1000,
INTEL_ALSA_SSP_CTRL_SND_PAUSE = 0x1001,
INTEL_ALSA_SSP_CTRL_SND_RESUME = 0x1002,
INTEL_ALSA_SSP_CTRL_SND_CLOSE = 0x1003,
};
/**
* @period_req_index: ALSA index ring buffer updated by the DMA transfer
* request goes from 0 .. (period_size -1)
* @period_cb_index: ALSA index ring buffer updated by the DMA transfer
* callback goes from 0 .. (period_size -1)
* @period_index_max : ALSA ring Buffer number of periods
* @addr: Virtual address of the DMA transfer
* @length: length in bytes of the DMA transfer
* @dma_running: Status of DMA transfer
*/
struct intel_alsa_ssp_dma_buf {
u32 period_req_index;
u32 period_cb_index;
u32 period_index_max;
u8 *addr;
int length;
};
struct intel_alsa_ssp_stream_info {
struct intel_alsa_ssp_dma_buf dma_slot;
struct snd_pcm_substream *substream;
ssize_t dbg_cum_bytes;
unsigned long stream_status;
unsigned int device_id;
unsigned int stream_dir;
unsigned int device_offset;
unsigned int stream_index;
};
struct intel_alsa_stream_status {
void *ssp_handle;
spinlock_t lock;
unsigned long stream_info;
};
int intel_alsa_ssp_control(int command, struct intel_alsa_ssp_stream_info *pl_str_info);
int intel_alsa_ssp_transfer_data(struct intel_alsa_ssp_stream_info *str_info);
int intel_alsa_ssp_dma_capture_complete(void *param);
int intel_alsa_ssp_dma_playback_complete(void *param);
void intel_alsa_reset_ssp_status(void);
#endif /* _INTEL_ALSA_SSP_HW_INTERFACE_H */
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