/* * sst_mfld_platform.c - Intel MID Platform driver * * Copyright (C) 2010-2013 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. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include #include #include "sst-mfld-platform.h" struct sst_device *sst; static DEFINE_MUTEX(sst_lock); extern struct snd_compr_ops sst_platform_compr_ops; int sst_register_dsp(struct sst_device *dev) { if (WARN_ON(!dev)) return -EINVAL; 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) { if (WARN_ON(!dev)) return -EINVAL; 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), .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 = "Compress-cpu-dai", .compress_dai = 1, .playback = { .channels_min = SST_STEREO, .channels_max = SST_STEREO, .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000, .formats = SNDRV_PCM_FMTBIT_S16_LE, }, }, }; /* helper functions */ 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_alloc_params(struct snd_pcm_substream *substream, struct snd_sst_alloc_params_ext *alloc_param) { unsigned int channels; snd_pcm_uframes_t period_size; ssize_t periodbytes; ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream); u32 buffer_addr = virt_to_phys(substream->dma_buffer.area); channels = substream->runtime->channels; period_size = substream->runtime->period_size; periodbytes = samples_to_bytes(substream->runtime, period_size); alloc_param->ring_buf_info[0].addr = buffer_addr; alloc_param->ring_buf_info[0].size = buffer_bytes; alloc_param->sg_count = 1; alloc_param->reserved = 0; alloc_param->frag_size = periodbytes * channels; } static void sst_fill_pcm_params(struct snd_pcm_substream *substream, struct snd_sst_stream_params *param) { 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.sfreq = substream->runtime->rate; /* PCM stream via ALSA interface */ param->uc.pcm_params.use_offload_path = 0; param->uc.pcm_params.reserved2 = 0; memset(param->uc.pcm_params.channel_map, 0, sizeof(u8)); } int sst_fill_stream_params(void *substream, struct snd_sst_params *str_params, bool is_compress) { struct snd_pcm_substream *pstream = NULL; struct snd_compr_stream *cstream = NULL; if (is_compress == true) cstream = (struct snd_compr_stream *)substream; else pstream = (struct snd_pcm_substream *)substream; str_params->stream_type = SST_STREAM_TYPE_MUSIC; /* For pcm streams */ if (pstream) str_params->ops = (u8)pstream->stream; if (cstream) str_params->ops = (u8)cstream->direction; return 0; } static int sst_platform_alloc_stream(struct snd_pcm_substream *substream, struct snd_soc_platform *platform) { struct sst_runtime_stream *stream = substream->runtime->private_data; struct snd_sst_stream_params param = {{{0,},},}; struct snd_sst_params str_params = {0}; struct snd_sst_alloc_params_ext alloc_params = {0}; int ret_val = 0; /* set codec params and inform SST driver the same */ sst_fill_pcm_params(substream, ¶m); sst_fill_alloc_params(substream, &alloc_params); substream->runtime->dma_area = substream->dma_buffer.area; str_params.sparams = param; str_params.aparams = alloc_params; str_params.codec = SST_CODEC_TYPE_PCM; /* fill the device type and stream id to pass to SST driver */ ret_val = sst_fill_stream_params(substream, &str_params, false); if (ret_val < 0) return ret_val; stream->stream_info.str_id = str_params.stream_id; ret_val = stream->ops->open(&str_params); if (ret_val <= 0) return ret_val; return ret_val; } static void sst_period_elapsed(void *arg) { struct snd_pcm_substream *substream = arg; 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.arg = 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_media_open(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { int ret_val = 0; struct snd_pcm_runtime *runtime = substream->runtime; struct sst_runtime_stream *stream; 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 || !try_module_get(sst->dev->driver->owner)) { pr_err("no device available to run\n"); ret_val = -ENODEV; goto out_ops; } stream->ops = sst->ops; mutex_unlock(&sst_lock); stream->stream_info.str_id = 0; stream->stream_info.arg = substream; /* allocate memory for SST API set */ runtime->private_data = stream; /* Make sure, that the period size is always even */ snd_pcm_hw_constraint_step(substream->runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 2); return snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); out_ops: kfree(stream); mutex_unlock(&sst_lock); return ret_val; } static void sst_media_close(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct sst_runtime_stream *stream; int ret_val = 0, str_id; 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; } static int sst_media_prepare(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct sst_runtime_stream *stream; int ret_val = 0, str_id; 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, dai->platform); 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_media_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { 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_media_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { return snd_pcm_lib_free_pages(substream); } static struct snd_soc_dai_ops sst_media_dai_ops = { .startup = sst_media_open, .shutdown = sst_media_close, .prepare = sst_media_prepare, .hw_params = sst_media_hw_params, .hw_free = sst_media_hw_free, }; static int sst_platform_open(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime; if (substream->pcm->internal) return 0; runtime = substream->runtime; runtime->hw = sst_platform_pcm_hw; return 0; } 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.arg = 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; } substream->runtime->delay = str_info->pcm_delay; return str_info->buffer_ptr; } static struct snd_pcm_ops sst_platform_ops = { .open = sst_platform_open, .ioctl = snd_pcm_lib_ioctl, .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); } 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; 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_DMA), 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, .compr_ops = &sst_platform_compr_ops, .pcm_new = sst_pcm_new, .pcm_free = sst_pcm_free, }; static const struct snd_soc_component_driver sst_component = { .name = "sst", }; 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_component(&pdev->dev, &sst_component, 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_component(&pdev->dev); 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-mfld-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-mfld-platform");