--- /dev/null
+/*
+ * 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 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 <vinod.koul@intel.com>");
+MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platfrom: sst-platform");
projects / profile / ivi / kernel-adaptation-intel-automotive.git / commitdiff