/* * 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 "../../../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 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 */ 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); substream->runtime->dma_area = 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); str_params.sparams = param; str_params.codec = SST_CODEC_TYPE_PCM; 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->control_set(SST_SND_ALLOC, &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; if (!substream || !substream->runtime) return; stream = substream->runtime->private_data; if (!stream) return; spin_lock(&stream->status_lock); if (stream->stream_status != SST_PLATFORM_RUNNING) { spin_unlock(&stream->status_lock); return; } spin_unlock(&stream->status_lock); snd_pcm_period_elapsed(substream); return; } 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"); spin_lock(&stream->status_lock); stream->stream_status = SST_PLATFORM_INIT; spin_unlock(&stream->status_lock); 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->control_set(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; spin_lock(&stream->status_lock); stream->stream_status = SST_PLATFORM_INIT; spin_unlock(&stream->status_lock); 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->control_set( SST_SND_FREE, &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->control_set( 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; 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"); ret_val = stream->sstdrv_ops->control_set( SST_SND_START, &str_id); if (ret_val) break; spin_lock(&stream->status_lock); stream->stream_status = SST_PLATFORM_RUNNING; spin_unlock(&stream->status_lock); stream->stream_info.mad_substream = substream; break; case SNDRV_PCM_TRIGGER_STOP: pr_debug("sst: in stop\n"); ret_val = stream->sstdrv_ops->control_set( SST_SND_DROP, &str_id); if (ret_val) break; spin_lock(&stream->status_lock); stream->stream_status = SST_PLATFORM_DROPPED; spin_unlock(&stream->status_lock); break; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: pr_debug("sst: in pause\n"); ret_val = stream->sstdrv_ops->control_set( SST_SND_PAUSE, &str_id); if (ret_val) break; spin_lock(&stream->status_lock); stream->stream_status = SST_PLATFORM_PAUSED; spin_unlock(&stream->status_lock); break; case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: pr_debug("sst: in pause release\n"); ret_val = stream->sstdrv_ops->control_set( SST_SND_RESUME, &str_id); if (ret_val) break; spin_lock(&stream->status_lock); stream->stream_status = SST_PLATFORM_RUNNING; spin_unlock(&stream->status_lock); break; default: ret_val = -EINVAL; } 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; struct pcm_stream_info *str_info; stream = substream->runtime->private_data; spin_lock(&stream->status_lock); if (stream->stream_status == SST_PLATFORM_INIT) { spin_unlock(&stream->status_lock); return 0; } spin_unlock(&stream->status_lock); str_info = &stream->stream_info; ret_val = stream->sstdrv_ops->control_set( 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 "); MODULE_AUTHOR("Harsha Priya "); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platfrom: sst-platform");