diff options
Diffstat (limited to 'sound/pci/intel_mid_i2s/intel_alsa_ssp_hw_interface.h')
| -rw-r--r-- | sound/pci/intel_mid_i2s/intel_alsa_ssp_hw_interface.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/sound/pci/intel_mid_i2s/intel_alsa_ssp_hw_interface.h b/sound/pci/intel_mid_i2s/intel_alsa_ssp_hw_interface.h new file mode 100644 index 00000000000..dfc6f91366c --- /dev/null +++ b/sound/pci/intel_mid_i2s/intel_alsa_ssp_hw_interface.h @@ -0,0 +1,98 @@ +/* + * 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 */ |