/* * sst_platform.c - Intel MID Platform driver * * Copyright (C) 2010 Intel Corp * Author: Vinod Koul * Author: Harsha Priya * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * 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 #include #include #include #include #include #include #include "sst_platform.h" static struct sst_device *sst; static DEFINE_MUTEX(sst_lock); int sst_register_dsp(struct sst_device *dev) { BUG_ON(!dev); if (!try_module_get(dev->dev->driver->owner)) return -ENODEV; mutex_lock(&sst_lock); if (sst) { pr_err("we already have a device %s\n", sst->name); module_put(dev->dev->driver->owner); mutex_unlock(&sst_lock); return -EEXIST; } pr_debug("registering device %s\n", dev->name); sst = dev; mutex_unlock(&sst_lock); return 0; } EXPORT_SYMBOL_GPL(sst_register_dsp); int sst_unregister_dsp(struct sst_device *dev) { BUG_ON(!dev); if (dev != sst) return -EINVAL; mutex_lock(&sst_lock); if (!sst) { mutex_unlock(&sst_lock); return -EIO; } module_put(sst->dev->driver->owner); pr_debug("unreg %s\n", sst->name); sst = NULL; mutex_unlock(&sst_lock); return 0; } EXPORT_SYMBOL_GPL(sst_unregister_dsp); 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 */ static 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, }, .capture = { .channels_min = 1, .channels_max = 5, .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) { unsigned long flags; spin_lock_irqsave(&stream->status_lock, flags); stream->stream_status = state; spin_unlock_irqrestore(&stream->status_lock, flags); } static inline int sst_get_stream_status(struct sst_runtime_stream *stream) { int state; unsigned long flags; spin_lock_irqsave(&stream->status_lock, flags); state = stream->stream_status; spin_unlock_irqrestore(&stream->status_lock, flags); return state; } static void sst_fill_pcm_params(struct snd_pcm_substream *substream, struct sst_pcm_params *param) { param->codec = SST_CODEC_TYPE_PCM; param->num_chan = (u8) substream->runtime->channels; param->pcm_wd_sz = substream->runtime->sample_bits; param->reserved = 0; param->sfreq = substream->runtime->rate; param->ring_buffer_size = snd_pcm_lib_buffer_bytes(substream); param->period_count = substream->runtime->period_size; param->ring_buffer_addr = virt_to_phys(substream->dma_buffer.area); pr_debug("period_cnt = %d\n", param->period_count); pr_debug("sfreq= %d, wd_sz = %d\n", param->sfreq, param->pcm_wd_sz); } static int sst_platform_alloc_stream(struct snd_pcm_substream *substream) { struct sst_runtime_stream *stream = substream->runtime->private_data; struct sst_pcm_params param = {0}; struct sst_stream_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.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->ops->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->ops->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 = substream->runtime; struct sst_runtime_stream *stream; int ret_val; pr_debug("sst_platform_open called\n"); snd_soc_set_runtime_hwparams(substream, &sst_platform_pcm_hw); ret_val = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); if (ret_val < 0) return ret_val; stream = kzalloc(sizeof(*stream), GFP_KERNEL); if (!stream) return -ENOMEM; spin_lock_init(&stream->status_lock); /* get the sst ops */ mutex_lock(&sst_lock); if (!sst) { pr_err("no device available to run\n"); mutex_unlock(&sst_lock); kfree(stream); return -ENODEV; } if (!try_module_get(sst->dev->driver->owner)) { mutex_unlock(&sst_lock); kfree(stream); return -ENODEV; } stream->ops = sst->ops; mutex_unlock(&sst_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 */ runtime->private_data = stream; return 0; } 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->ops->close(str_id); module_put(sst->dev->driver->owner); 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->ops->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->ops->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->ops->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 int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); memset(substream->runtime->dma_area, 0, params_buffer_bytes(params)); return 0; } static int sst_platform_pcm_hw_free(struct snd_pcm_substream *substream) { return snd_pcm_lib_free_pages(substream); } 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, .hw_params = sst_platform_pcm_hw_params, .hw_free = sst_platform_pcm_hw_free, }; static void sst_pcm_free(struct snd_pcm *pcm) { pr_debug("sst_pcm_free called\n"); snd_pcm_lib_preallocate_free_for_all(pcm); } static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd) { struct snd_soc_dai *dai = rtd->cpu_dai; struct snd_pcm *pcm = rtd->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; } static 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"); sst = NULL; 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 success\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, }; module_platform_driver(sst_platform_driver); MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver"); MODULE_AUTHOR("Vinod Koul "); MODULE_AUTHOR("Harsha Priya "); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:sst-platform");