diff options
Diffstat (limited to 'sound/soc/mid-x86/sst_platform.c')
| -rw-r--r-- | sound/soc/mid-x86/sst_platform.c | 474 |
1 files changed, 474 insertions, 0 deletions
diff --git a/sound/soc/mid-x86/sst_platform.c b/sound/soc/mid-x86/sst_platform.c new file mode 100644 index 0000000..ee2c224 --- /dev/null +++ b/sound/soc/mid-x86/sst_platform.c @@ -0,0 +1,474 @@ +/* + * 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, + }, + .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) +{ + 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 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 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, +}; + +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"); |