| /* |
| * sst_platform.c - Intel MID Platform driver |
| * |
| * Copyright (C) 2010 Intel Corp |
| * Author: Vinod Koul <vinod.koul@intel.com> |
| * Author: Harsha Priya <priya.harsha@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. |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| * |
| */ |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/slab.h> |
| #include <linux/io.h> |
| #include <sound/core.h> |
| #include <sound/pcm.h> |
| #include <sound/pcm_params.h> |
| #include <sound/soc.h> |
| #include "../../../drivers/staging/intel_sst/intel_sst_ioctl.h" |
| #include "../../../drivers/staging/intel_sst/intel_sst.h" |
| #include "sst_platform.h" |
| |
| static struct snd_pcm_hardware sst_platform_pcm_hw = { |
| .info = (SNDRV_PCM_INFO_INTERLEAVED | |
| SNDRV_PCM_INFO_DOUBLE | |
| SNDRV_PCM_INFO_PAUSE | |
| SNDRV_PCM_INFO_RESUME | |
| SNDRV_PCM_INFO_MMAP| |
| SNDRV_PCM_INFO_MMAP_VALID | |
| SNDRV_PCM_INFO_BLOCK_TRANSFER | |
| SNDRV_PCM_INFO_SYNC_START), |
| .formats = (SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_U16 | |
| SNDRV_PCM_FMTBIT_S24 | SNDRV_PCM_FMTBIT_U24 | |
| SNDRV_PCM_FMTBIT_S32 | SNDRV_PCM_FMTBIT_U32), |
| .rates = (SNDRV_PCM_RATE_8000| |
| SNDRV_PCM_RATE_44100 | |
| SNDRV_PCM_RATE_48000), |
| .rate_min = SST_MIN_RATE, |
| .rate_max = SST_MAX_RATE, |
| .channels_min = SST_MIN_CHANNEL, |
| .channels_max = SST_MAX_CHANNEL, |
| .buffer_bytes_max = SST_MAX_BUFFER, |
| .period_bytes_min = SST_MIN_PERIOD_BYTES, |
| .period_bytes_max = SST_MAX_PERIOD_BYTES, |
| .periods_min = SST_MIN_PERIODS, |
| .periods_max = SST_MAX_PERIODS, |
| .fifo_size = SST_FIFO_SIZE, |
| }; |
| |
| /* MFLD - MSIC */ |
| struct snd_soc_dai_driver sst_platform_dai[] = { |
| { |
| .name = "Headset-cpu-dai", |
| .id = 0, |
| .playback = { |
| .channels_min = SST_STEREO, |
| .channels_max = SST_STEREO, |
| .rates = SNDRV_PCM_RATE_48000, |
| .formats = SNDRV_PCM_FMTBIT_S24_LE, |
| }, |
| }, |
| { |
| .name = "Speaker-cpu-dai", |
| .id = 1, |
| .playback = { |
| .channels_min = SST_MONO, |
| .channels_max = SST_STEREO, |
| .rates = SNDRV_PCM_RATE_48000, |
| .formats = SNDRV_PCM_FMTBIT_S24_LE, |
| }, |
| }, |
| { |
| .name = "Vibra1-cpu-dai", |
| .id = 2, |
| .playback = { |
| .channels_min = SST_MONO, |
| .channels_max = SST_MONO, |
| .rates = SNDRV_PCM_RATE_48000, |
| .formats = SNDRV_PCM_FMTBIT_S24_LE, |
| }, |
| }, |
| { |
| .name = "Vibra2-cpu-dai", |
| .id = 3, |
| .playback = { |
| .channels_min = SST_MONO, |
| .channels_max = SST_STEREO, |
| .rates = SNDRV_PCM_RATE_48000, |
| .formats = SNDRV_PCM_FMTBIT_S24_LE, |
| }, |
| }, |
| }; |
| |
| /* helper functions */ |
| static inline void sst_set_stream_status(struct sst_runtime_stream *stream, |
| int state) |
| { |
| spin_lock(&stream->status_lock); |
| stream->stream_status = state; |
| spin_unlock(&stream->status_lock); |
| } |
| |
| static inline int sst_get_stream_status(struct sst_runtime_stream *stream) |
| { |
| int state; |
| |
| spin_lock(&stream->status_lock); |
| state = stream->stream_status; |
| spin_unlock(&stream->status_lock); |
| return state; |
| } |
| |
| static void sst_fill_pcm_params(struct snd_pcm_substream *substream, |
| struct snd_sst_stream_params *param) |
| { |
| |
| param->uc.pcm_params.codec = SST_CODEC_TYPE_PCM; |
| param->uc.pcm_params.num_chan = (u8) substream->runtime->channels; |
| param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits; |
| param->uc.pcm_params.reserved = 0; |
| param->uc.pcm_params.sfreq = substream->runtime->rate; |
| param->uc.pcm_params.ring_buffer_size = |
| snd_pcm_lib_buffer_bytes(substream); |
| param->uc.pcm_params.period_count = substream->runtime->period_size; |
| param->uc.pcm_params.ring_buffer_addr = |
| virt_to_phys(substream->dma_buffer.area); |
| pr_debug("period_cnt = %d\n", param->uc.pcm_params.period_count); |
| pr_debug("sfreq= %d, wd_sz = %d\n", |
| param->uc.pcm_params.sfreq, param->uc.pcm_params.pcm_wd_sz); |
| } |
| |
| static int sst_platform_alloc_stream(struct snd_pcm_substream *substream) |
| { |
| struct sst_runtime_stream *stream = |
| substream->runtime->private_data; |
| struct snd_sst_stream_params param = {{{0,},},}; |
| struct snd_sst_params str_params = {0}; |
| int ret_val; |
| |
| /* set codec params and inform SST driver the same */ |
| sst_fill_pcm_params(substream, ¶m); |
| substream->runtime->dma_area = substream->dma_buffer.area; |
| str_params.sparams = param; |
| str_params.codec = param.uc.pcm_params.codec; |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| str_params.ops = STREAM_OPS_PLAYBACK; |
| str_params.device_type = substream->pcm->device + 1; |
| pr_debug("Playbck stream,Device %d\n", |
| substream->pcm->device); |
| } else { |
| str_params.ops = STREAM_OPS_CAPTURE; |
| str_params.device_type = SND_SST_DEVICE_CAPTURE; |
| pr_debug("Capture stream,Device %d\n", |
| substream->pcm->device); |
| } |
| ret_val = stream->sstdrv_ops->pcm_control->open(&str_params); |
| pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val); |
| if (ret_val < 0) |
| return ret_val; |
| |
| stream->stream_info.str_id = ret_val; |
| pr_debug("str id : %d\n", stream->stream_info.str_id); |
| return ret_val; |
| } |
| |
| static void sst_period_elapsed(void *mad_substream) |
| { |
| struct snd_pcm_substream *substream = mad_substream; |
| struct sst_runtime_stream *stream; |
| int status; |
| |
| if (!substream || !substream->runtime) |
| return; |
| stream = substream->runtime->private_data; |
| if (!stream) |
| return; |
| status = sst_get_stream_status(stream); |
| if (status != SST_PLATFORM_RUNNING) |
| return; |
| snd_pcm_period_elapsed(substream); |
| } |
| |
| static int sst_platform_init_stream(struct snd_pcm_substream *substream) |
| { |
| struct sst_runtime_stream *stream = |
| substream->runtime->private_data; |
| int ret_val; |
| |
| pr_debug("setting buffer ptr param\n"); |
| sst_set_stream_status(stream, SST_PLATFORM_INIT); |
| stream->stream_info.period_elapsed = sst_period_elapsed; |
| stream->stream_info.mad_substream = substream; |
| stream->stream_info.buffer_ptr = 0; |
| stream->stream_info.sfreq = substream->runtime->rate; |
| ret_val = stream->sstdrv_ops->pcm_control->device_control( |
| SST_SND_STREAM_INIT, &stream->stream_info); |
| if (ret_val) |
| pr_err("control_set ret error %d\n", ret_val); |
| return ret_val; |
| |
| } |
| /* end -- helper functions */ |
| |
| static int sst_platform_open(struct snd_pcm_substream *substream) |
| { |
| struct snd_pcm_runtime *runtime; |
| struct sst_runtime_stream *stream; |
| int ret_val = 0; |
| |
| pr_debug("sst_platform_open called\n"); |
| runtime = substream->runtime; |
| runtime->hw = sst_platform_pcm_hw; |
| stream = kzalloc(sizeof(*stream), GFP_KERNEL); |
| if (!stream) |
| return -ENOMEM; |
| spin_lock_init(&stream->status_lock); |
| stream->stream_info.str_id = 0; |
| sst_set_stream_status(stream, SST_PLATFORM_INIT); |
| stream->stream_info.mad_substream = substream; |
| /* allocate memory for SST API set */ |
| stream->sstdrv_ops = kzalloc(sizeof(*stream->sstdrv_ops), |
| GFP_KERNEL); |
| if (!stream->sstdrv_ops) { |
| pr_err("sst: mem allocation for ops fail\n"); |
| kfree(stream); |
| return -ENOMEM; |
| } |
| stream->sstdrv_ops->vendor_id = MSIC_VENDOR_ID; |
| /* registering with SST driver to get access to SST APIs to use */ |
| ret_val = register_sst_card(stream->sstdrv_ops); |
| if (ret_val) { |
| pr_err("sst: sst card registration failed\n"); |
| return ret_val; |
| } |
| runtime->private_data = stream; |
| return snd_pcm_hw_constraint_integer(runtime, |
| SNDRV_PCM_HW_PARAM_PERIODS); |
| } |
| |
| static int sst_platform_close(struct snd_pcm_substream *substream) |
| { |
| struct sst_runtime_stream *stream; |
| int ret_val = 0, str_id; |
| |
| pr_debug("sst_platform_close called\n"); |
| stream = substream->runtime->private_data; |
| str_id = stream->stream_info.str_id; |
| if (str_id) |
| ret_val = stream->sstdrv_ops->pcm_control->close(str_id); |
| kfree(stream->sstdrv_ops); |
| kfree(stream); |
| return ret_val; |
| } |
| |
| static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream) |
| { |
| struct sst_runtime_stream *stream; |
| int ret_val = 0, str_id; |
| |
| pr_debug("sst_platform_pcm_prepare called\n"); |
| stream = substream->runtime->private_data; |
| str_id = stream->stream_info.str_id; |
| if (stream->stream_info.str_id) { |
| ret_val = stream->sstdrv_ops->pcm_control->device_control( |
| SST_SND_DROP, &str_id); |
| return ret_val; |
| } |
| |
| ret_val = sst_platform_alloc_stream(substream); |
| if (ret_val < 0) |
| return ret_val; |
| snprintf(substream->pcm->id, sizeof(substream->pcm->id), |
| "%d", stream->stream_info.str_id); |
| |
| ret_val = sst_platform_init_stream(substream); |
| if (ret_val) |
| return ret_val; |
| substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER; |
| return ret_val; |
| } |
| |
| static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream, |
| int cmd) |
| { |
| int ret_val = 0, str_id; |
| struct sst_runtime_stream *stream; |
| int str_cmd, status; |
| |
| pr_debug("sst_platform_pcm_trigger called\n"); |
| stream = substream->runtime->private_data; |
| str_id = stream->stream_info.str_id; |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| pr_debug("sst: Trigger Start\n"); |
| str_cmd = SST_SND_START; |
| status = SST_PLATFORM_RUNNING; |
| stream->stream_info.mad_substream = substream; |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| pr_debug("sst: in stop\n"); |
| str_cmd = SST_SND_DROP; |
| status = SST_PLATFORM_DROPPED; |
| break; |
| case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| pr_debug("sst: in pause\n"); |
| str_cmd = SST_SND_PAUSE; |
| status = SST_PLATFORM_PAUSED; |
| break; |
| case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| pr_debug("sst: in pause release\n"); |
| str_cmd = SST_SND_RESUME; |
| status = SST_PLATFORM_RUNNING; |
| break; |
| default: |
| return -EINVAL; |
| } |
| ret_val = stream->sstdrv_ops->pcm_control->device_control(str_cmd, |
| &str_id); |
| if (!ret_val) |
| sst_set_stream_status(stream, status); |
| |
| return ret_val; |
| } |
| |
| |
| static snd_pcm_uframes_t sst_platform_pcm_pointer |
| (struct snd_pcm_substream *substream) |
| { |
| struct sst_runtime_stream *stream; |
| int ret_val, status; |
| struct pcm_stream_info *str_info; |
| |
| stream = substream->runtime->private_data; |
| status = sst_get_stream_status(stream); |
| if (status == SST_PLATFORM_INIT) |
| return 0; |
| str_info = &stream->stream_info; |
| ret_val = stream->sstdrv_ops->pcm_control->device_control( |
| SST_SND_BUFFER_POINTER, str_info); |
| if (ret_val) { |
| pr_err("sst: error code = %d\n", ret_val); |
| return ret_val; |
| } |
| return stream->stream_info.buffer_ptr; |
| } |
| |
| |
| static struct snd_pcm_ops sst_platform_ops = { |
| .open = sst_platform_open, |
| .close = sst_platform_close, |
| .ioctl = snd_pcm_lib_ioctl, |
| .prepare = sst_platform_pcm_prepare, |
| .trigger = sst_platform_pcm_trigger, |
| .pointer = sst_platform_pcm_pointer, |
| }; |
| |
| static void sst_pcm_free(struct snd_pcm *pcm) |
| { |
| pr_debug("sst_pcm_free called\n"); |
| snd_pcm_lib_preallocate_free_for_all(pcm); |
| } |
| |
| int sst_pcm_new(struct snd_card *card, struct snd_soc_dai *dai, |
| struct snd_pcm *pcm) |
| { |
| int retval = 0; |
| |
| pr_debug("sst_pcm_new called\n"); |
| if (dai->driver->playback.channels_min || |
| dai->driver->capture.channels_min) { |
| retval = snd_pcm_lib_preallocate_pages_for_all(pcm, |
| SNDRV_DMA_TYPE_CONTINUOUS, |
| snd_dma_continuous_data(GFP_KERNEL), |
| SST_MIN_BUFFER, SST_MAX_BUFFER); |
| if (retval) { |
| pr_err("dma buffer allocationf fail\n"); |
| return retval; |
| } |
| } |
| return retval; |
| } |
| struct snd_soc_platform_driver sst_soc_platform_drv = { |
| .ops = &sst_platform_ops, |
| .pcm_new = sst_pcm_new, |
| .pcm_free = sst_pcm_free, |
| }; |
| |
| static int sst_platform_probe(struct platform_device *pdev) |
| { |
| int ret; |
| |
| pr_debug("sst_platform_probe called\n"); |
| ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv); |
| if (ret) { |
| pr_err("registering soc platform failed\n"); |
| return ret; |
| } |
| |
| ret = snd_soc_register_dais(&pdev->dev, |
| sst_platform_dai, ARRAY_SIZE(sst_platform_dai)); |
| if (ret) { |
| pr_err("registering cpu dais failed\n"); |
| snd_soc_unregister_platform(&pdev->dev); |
| } |
| return ret; |
| } |
| |
| static int sst_platform_remove(struct platform_device *pdev) |
| { |
| |
| snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(sst_platform_dai)); |
| snd_soc_unregister_platform(&pdev->dev); |
| pr_debug("sst_platform_remove sucess\n"); |
| return 0; |
| } |
| |
| static struct platform_driver sst_platform_driver = { |
| .driver = { |
| .name = "sst-platform", |
| .owner = THIS_MODULE, |
| }, |
| .probe = sst_platform_probe, |
| .remove = sst_platform_remove, |
| }; |
| |
| static int __init sst_soc_platform_init(void) |
| { |
| pr_debug("sst_soc_platform_init called\n"); |
| return platform_driver_register(&sst_platform_driver); |
| } |
| module_init(sst_soc_platform_init); |
| |
| static void __exit sst_soc_platform_exit(void) |
| { |
| platform_driver_unregister(&sst_platform_driver); |
| pr_debug("sst_soc_platform_exit sucess\n"); |
| } |
| module_exit(sst_soc_platform_exit); |
| |
| MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver"); |
| MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>"); |
| MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>"); |
| MODULE_LICENSE("GPL v2"); |
| MODULE_ALIAS("platform:sst-platform"); |