[deliverable/linux.git] / sound / soc / mid-x86 / sst_platform.c

/*
 *  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");
Commit	Line	Data
d927fdae VK	1	/*
	2	* sst_platform.c - Intel MID Platform driver
	3	*
	4	* Copyright (C) 2010 Intel Corp
	5	* Author: Vinod Koul <vinod.koul@intel.com>
	6	* Author: Harsha Priya <priya.harsha@intel.com>
	7	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; version 2 of the License.
	12	*
	13	* This program is distributed in the hope that it will be useful, but
	14	* WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	* General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License along
	19	* with this program; if not, write to the Free Software Foundation, Inc.,
	20	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	21	*
	22	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	23	*
	24	*
	25	*/
	26	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	27
	28	#include <linux/slab.h>
	29	#include <linux/io.h>
	30	#include <sound/core.h>
	31	#include <sound/pcm.h>
	32	#include <sound/pcm_params.h>
	33	#include <sound/soc.h>
	34	#include "../../../drivers/staging/intel_sst/intel_sst_ioctl.h"
	35	#include "../../../drivers/staging/intel_sst/intel_sst.h"
	36	#include "sst_platform.h"
	37
	38	static struct snd_pcm_hardware sst_platform_pcm_hw = {
	39	.info = (SNDRV_PCM_INFO_INTERLEAVED \|
	40	SNDRV_PCM_INFO_DOUBLE \|
	41	SNDRV_PCM_INFO_PAUSE \|
	42	SNDRV_PCM_INFO_RESUME \|
	43	SNDRV_PCM_INFO_MMAP\|
	44	SNDRV_PCM_INFO_MMAP_VALID \|
	45	SNDRV_PCM_INFO_BLOCK_TRANSFER \|
	46	SNDRV_PCM_INFO_SYNC_START),
	47	.formats = (SNDRV_PCM_FMTBIT_S16 \| SNDRV_PCM_FMTBIT_U16 \|
	48	SNDRV_PCM_FMTBIT_S24 \| SNDRV_PCM_FMTBIT_U24 \|
	49	SNDRV_PCM_FMTBIT_S32 \| SNDRV_PCM_FMTBIT_U32),
	50	.rates = (SNDRV_PCM_RATE_8000\|
	51	SNDRV_PCM_RATE_44100 \|
	52	SNDRV_PCM_RATE_48000),
	53	.rate_min = SST_MIN_RATE,
	54	.rate_max = SST_MAX_RATE,
	55	.channels_min = SST_MIN_CHANNEL,
	56	.channels_max = SST_MAX_CHANNEL,
	57	.buffer_bytes_max = SST_MAX_BUFFER,
	58	.period_bytes_min = SST_MIN_PERIOD_BYTES,
	59	.period_bytes_max = SST_MAX_PERIOD_BYTES,
	60	.periods_min = SST_MIN_PERIODS,
	61	.periods_max = SST_MAX_PERIODS,
	62	.fifo_size = SST_FIFO_SIZE,
	63	};
	64
65	/* MFLD - MSIC */
66	struct snd_soc_dai_driver sst_platform_dai[] = {
67	{
68	.name = "Headset-cpu-dai",
69	.id = 0,
70	.playback = {
71	.channels_min = SST_STEREO,
72	.channels_max = SST_STEREO,
73	.rates = SNDRV_PCM_RATE_48000,
74	.formats = SNDRV_PCM_FMTBIT_S24_LE,
75	},
76	},
77	{
78	.name = "Speaker-cpu-dai",
79	.id = 1,
80	.playback = {
81	.channels_min = SST_MONO,
82	.channels_max = SST_STEREO,
83	.rates = SNDRV_PCM_RATE_48000,
84	.formats = SNDRV_PCM_FMTBIT_S24_LE,
85	},
86	},
87	{
88	.name = "Vibra1-cpu-dai",
89	.id = 2,
90	.playback = {
91	.channels_min = SST_MONO,
92	.channels_max = SST_MONO,
93	.rates = SNDRV_PCM_RATE_48000,
94	.formats = SNDRV_PCM_FMTBIT_S24_LE,
95	},
96	},
97	{
98	.name = "Vibra2-cpu-dai",
99	.id = 3,
100	.playback = {
101	.channels_min = SST_MONO,
102	.channels_max = SST_STEREO,
103	.rates = SNDRV_PCM_RATE_48000,
104	.formats = SNDRV_PCM_FMTBIT_S24_LE,
105	},
106	},
107	};
108	/* helper functions */
109	static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
110	{
111	struct sst_runtime_stream *stream =
112	substream->runtime->private_data;
113	struct snd_sst_stream_params param = {{{0,},},};
114	struct snd_sst_params str_params = {0};
115	int ret_val;
116
117	/* set codec params and inform SST driver the same */
118
119	param.uc.pcm_params.codec = SST_CODEC_TYPE_PCM;
120	param.uc.pcm_params.num_chan = (u8) substream->runtime->channels;
121	param.uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
122	param.uc.pcm_params.reserved = 0;
123	param.uc.pcm_params.sfreq = substream->runtime->rate;
124	param.uc.pcm_params.ring_buffer_size =
125	snd_pcm_lib_buffer_bytes(substream);
126	param.uc.pcm_params.period_count = substream->runtime->period_size;
127	param.uc.pcm_params.ring_buffer_addr =
128	virt_to_phys(substream->dma_buffer.area);
129	substream->runtime->dma_area = substream->dma_buffer.area;
130
131	pr_debug("period_cnt = %d\n", param.uc.pcm_params.period_count);
132	pr_debug("sfreq= %d, wd_sz = %d\n",
133	param.uc.pcm_params.sfreq, param.uc.pcm_params.pcm_wd_sz);
134
135	str_params.sparams = param;
136	str_params.codec = SST_CODEC_TYPE_PCM;
137
138	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
139	str_params.ops = STREAM_OPS_PLAYBACK;
140	str_params.device_type = substream->pcm->device + 1;
141	pr_debug("Playbck stream,Device %d\n",
142	substream->pcm->device);
143	} else {
144	str_params.ops = STREAM_OPS_CAPTURE;
145	str_params.device_type = SND_SST_DEVICE_CAPTURE;
146	pr_debug("Capture stream,Device %d\n",
147	substream->pcm->device);
148	}
149	ret_val = stream->sstdrv_ops->control_set(SST_SND_ALLOC, &str_params);
150	pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
151	if (ret_val < 0)
152	return ret_val;
153
154	stream->stream_info.str_id = ret_val;
155	pr_debug("str id : %d\n", stream->stream_info.str_id);
156
157	return ret_val;
158	}
159
160
161	static void sst_period_elapsed(void *mad_substream)
162	{
163	struct snd_pcm_substream *substream = mad_substream;
164	struct sst_runtime_stream *stream;
165
166	if (!substream \|\| !substream->runtime)
167	return;
168	stream = substream->runtime->private_data;
169	if (!stream)
170	return;
171
172	spin_lock(&stream->status_lock);
173	if (stream->stream_status != SST_PLATFORM_RUNNING) {
174	spin_unlock(&stream->status_lock);
175	return;
176	}
177	spin_unlock(&stream->status_lock);
178	snd_pcm_period_elapsed(substream);
179	return;
180	}
181
182	static int sst_platform_init_stream(struct snd_pcm_substream *substream)
183	{
184	struct sst_runtime_stream *stream =
185	substream->runtime->private_data;
186	int ret_val;
187
188	pr_debug("setting buffer ptr param\n");
189	spin_lock(&stream->status_lock);
190	stream->stream_status = SST_PLATFORM_INIT;
191	spin_unlock(&stream->status_lock);
192	stream->stream_info.period_elapsed = sst_period_elapsed;
193	stream->stream_info.mad_substream = substream;
194	stream->stream_info.buffer_ptr = 0;
195	stream->stream_info.sfreq = substream->runtime->rate;
196	ret_val = stream->sstdrv_ops->control_set(SST_SND_STREAM_INIT,
197	&stream->stream_info);
198	if (ret_val)
199	pr_err("control_set ret error %d\n", ret_val);
200	return ret_val;
201
202	}
203	/* end -- helper functions */
204
205	static int sst_platform_open(struct snd_pcm_substream *substream)
206	{
207	struct snd_pcm_runtime *runtime;
208	struct sst_runtime_stream *stream;
209	int ret_val = 0;
210
211	pr_debug("sst_platform_open called\n");
212
213	runtime = substream->runtime;
214	runtime->hw = sst_platform_pcm_hw;
215
216	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
217	if (!stream)
218	return -ENOMEM;
219
220	spin_lock_init(&stream->status_lock);
221	stream->stream_info.str_id = 0;
222
223	spin_lock(&stream->status_lock);
224	stream->stream_status = SST_PLATFORM_INIT;
225	spin_unlock(&stream->status_lock);
226
227	stream->stream_info.mad_substream = substream;
228	/* allocate memory for SST API set */
229	stream->sstdrv_ops = kzalloc(sizeof(*stream->sstdrv_ops),
230	GFP_KERNEL);
231	if (!stream->sstdrv_ops) {
232	pr_err("sst: mem allocation for ops fail\n");
233	kfree(stream);
234	return -ENOMEM;
235	}
236	stream->sstdrv_ops->vendor_id = MSIC_VENDOR_ID;
237
238	/* registering with SST driver to get access to SST APIs to use */
239	ret_val = register_sst_card(stream->sstdrv_ops);
240	if (ret_val) {
241	pr_err("sst: sst card registration failed\n");
242	return ret_val;
243	}
244	runtime->private_data = stream;
245	return snd_pcm_hw_constraint_integer(runtime,
246	SNDRV_PCM_HW_PARAM_PERIODS);
247	}
248
249	static int sst_platform_close(struct snd_pcm_substream *substream)
250	{
251	struct sst_runtime_stream *stream;
252	int ret_val = 0, str_id;
253
254	pr_debug("sst_platform_close called\n");
255
256	stream = substream->runtime->private_data;
257	str_id = stream->stream_info.str_id;
258
259	if (str_id)
260	ret_val = stream->sstdrv_ops->control_set(
261	SST_SND_FREE, &str_id);
262
263	kfree(stream->sstdrv_ops);
264	kfree(stream);
265	return ret_val;
266	}
267
268	static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
269	{
270	struct sst_runtime_stream *stream;
271	int ret_val = 0, str_id;
272
273	pr_debug("sst_platform_pcm_prepare called\n");
274
275	stream = substream->runtime->private_data;
276	str_id = stream->stream_info.str_id;
277	if (stream->stream_info.str_id) {
278	ret_val = stream->sstdrv_ops->control_set(
279	SST_SND_DROP, &str_id);
280	return ret_val;
281	}
282
283	ret_val = sst_platform_alloc_stream(substream);
284	if (ret_val < 0)
285	return ret_val;
286	snprintf(substream->pcm->id, sizeof(substream->pcm->id),
287	"%d", stream->stream_info.str_id);
288
289	ret_val = sst_platform_init_stream(substream);
290	if (ret_val)
291	return ret_val;
292	substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
293	return ret_val;
294	}
295
296	static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
297	int cmd)
298	{
299	int ret_val = 0, str_id;
300	struct sst_runtime_stream *stream;
301
302	pr_debug("sst_platform_pcm_trigger called\n");
303
304	stream = substream->runtime->private_data;
305
306	str_id = stream->stream_info.str_id;
307
308	switch (cmd) {
309	case SNDRV_PCM_TRIGGER_START:
310	pr_debug("sst: Trigger Start\n");
311	ret_val = stream->sstdrv_ops->control_set(
312	SST_SND_START, &str_id);
313	if (ret_val)
314	break;
315	spin_lock(&stream->status_lock);
316	stream->stream_status = SST_PLATFORM_RUNNING;
317	spin_unlock(&stream->status_lock);
318	stream->stream_info.mad_substream = substream;
319	break;
320	case SNDRV_PCM_TRIGGER_STOP:
321	pr_debug("sst: in stop\n");
322	ret_val = stream->sstdrv_ops->control_set(
323	SST_SND_DROP, &str_id);
324	if (ret_val)
325	break;
326	spin_lock(&stream->status_lock);
327	stream->stream_status = SST_PLATFORM_DROPPED;
328	spin_unlock(&stream->status_lock);
329	break;
330	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
331	pr_debug("sst: in pause\n");
332	ret_val = stream->sstdrv_ops->control_set(
333	SST_SND_PAUSE, &str_id);
334	if (ret_val)
335	break;
336	spin_lock(&stream->status_lock);
337	stream->stream_status = SST_PLATFORM_PAUSED;
338	spin_unlock(&stream->status_lock);
339	break;
340	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
341	pr_debug("sst: in pause release\n");
342	ret_val = stream->sstdrv_ops->control_set(
343	SST_SND_RESUME, &str_id);
344	if (ret_val)
345	break;
346	spin_lock(&stream->status_lock);
347	stream->stream_status = SST_PLATFORM_RUNNING;
348	spin_unlock(&stream->status_lock);
349	break;
350	default:
351	ret_val = -EINVAL;
352	}
353	return ret_val;
354	}
355
356
357	static snd_pcm_uframes_t sst_platform_pcm_pointer
358	(struct snd_pcm_substream *substream)
359	{
360	struct sst_runtime_stream *stream;
361	int ret_val;
362	struct pcm_stream_info *str_info;
363
364
365	stream = substream->runtime->private_data;
366	spin_lock(&stream->status_lock);
367	if (stream->stream_status == SST_PLATFORM_INIT) {
368	spin_unlock(&stream->status_lock);
369	return 0;
370	}
371	spin_unlock(&stream->status_lock);
372
373	str_info = &stream->stream_info;
374	ret_val = stream->sstdrv_ops->control_set(
375	SST_SND_BUFFER_POINTER, str_info);
376	if (ret_val) {
377	pr_err("sst: error code = %d\n", ret_val);
378	return ret_val;
379	}
380
381	return stream->stream_info.buffer_ptr;
382	}
383
384
385	static struct snd_pcm_ops sst_platform_ops = {
386	.open = sst_platform_open,
387	.close = sst_platform_close,
388	.ioctl = snd_pcm_lib_ioctl,
389	.prepare = sst_platform_pcm_prepare,
390	.trigger = sst_platform_pcm_trigger,
391	.pointer = sst_platform_pcm_pointer,
392	};
393
394	static void sst_pcm_free(struct snd_pcm *pcm)
395	{
396	pr_debug("sst_pcm_free called\n");
397	snd_pcm_lib_preallocate_free_for_all(pcm);
398	}
399
400	int sst_pcm_new(struct snd_card card, struct snd_soc_dai dai,
401	struct snd_pcm *pcm)
402	{
403	int retval = 0;
404
405	pr_debug("sst_pcm_new called\n");
406
407	if (dai->driver->playback.channels_min \|\|
408	dai->driver->capture.channels_min) {
409	retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
410	SNDRV_DMA_TYPE_CONTINUOUS,
411	snd_dma_continuous_data(GFP_KERNEL),
412	SST_MIN_BUFFER, SST_MAX_BUFFER);
413	if (retval) {
414	pr_err("dma buffer allocationf fail\n");
415	return retval;
416	}
417	}
418
419	return retval;
420	}
421	struct snd_soc_platform_driver sst_soc_platform_drv = {
422	.ops = &sst_platform_ops,
423	.pcm_new = sst_pcm_new,
424	.pcm_free = sst_pcm_free,
425	};
426
427	static int sst_platform_probe(struct platform_device *pdev)
428	{
429	int ret;
430
431	pr_debug("sst_platform_probe called\n");
432	ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
433	if (ret) {
434	pr_err("registering soc platform failed\n");
435	return ret;
436	}
437	ret = snd_soc_register_dais(&pdev->dev,
438	sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
439	if (ret) {
440	pr_err("registering cpu dais failed\n");
441	snd_soc_unregister_platform(&pdev->dev);
442	}
443	return ret;
444	}
445
446	static int sst_platform_remove(struct platform_device *pdev)
447	{
448
449	snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(sst_platform_dai));
450
451	snd_soc_unregister_platform(&pdev->dev);
452	pr_debug("sst_platform_remove sucess\n");
453
454	return 0;
455	}
456
457	static struct platform_driver sst_platform_driver = {
458	.driver = {
459	.name = "sst-platform",
460	.owner = THIS_MODULE,
461	},
462	.probe = sst_platform_probe,
463	.remove = sst_platform_remove,
464	};
465
466	static int __init sst_soc_platform_init(void)
467	{
468	pr_debug("sst_soc_platform_init called\n");
469	return platform_driver_register(&sst_platform_driver);
470	}
471	module_init(sst_soc_platform_init);
472
473	static void __exit sst_soc_platform_exit(void)
474	{
475	platform_driver_unregister(&sst_platform_driver);
476	pr_debug("sst_soc_platform_exit sucess\n");
477	}
478	module_exit(sst_soc_platform_exit);
479
480	MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
481	MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
482	MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
483	MODULE_LICENSE("GPL v2");
484	MODULE_ALIAS("platfrom: sst-platform");