1 files changed, 484 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 000000000000..189d546fbf94
--- /dev/null
+++ b/sound/soc/mid-x86/sst_platform.c
@@ -0,0 +1,484 @@
+/*
+ *  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");