[alsa-devel] [PATCH 2/4] ASoC sst: Add mid platform driver
Vinod Koul
vinod.koul at intel.com
Thu Dec 30 12:12:53 CET 2010
This patch adds the platform driver for mid asoc drivers
This platfrom driver sends commands to sst dsp engine driver for the dai operations.
For this purpose it depends on intel_sst driver which is currently in staging tree
Signed-off-by: Vinod Koul <vinod.koul at intel.com>
Signed-off-by: Harsha Priya <priya.harsha at intel.com>
---
sound/soc/mid-x86/mid_platform.c | 365 ++++++++++++++++++++++++++++++++++
sound/soc/mid-x86/mid_platform.h | 71 +++++++
sound/soc/mid-x86/mid_platform_lib.c | 122 +++++++++++
3 files changed, 558 insertions(+), 0 deletions(-)
create mode 100644 sound/soc/mid-x86/mid_platform.c
create mode 100644 sound/soc/mid-x86/mid_platform.h
create mode 100644 sound/soc/mid-x86/mid_platform_lib.c
diff --git a/sound/soc/mid-x86/mid_platform.c b/sound/soc/mid-x86/mid_platform.c
new file mode 100644
index 0000000..3d26e6e
--- /dev/null
+++ b/sound/soc/mid-x86/mid_platform.c
@@ -0,0 +1,365 @@
+/*
+ * mid_platform.c - Intel MID common Platform driver
+ *
+ * Copyright (C) 2010 Intel Corp
+ * Author: Vinod Koul <vinod.koul at intel.com>
+ * Author: Harsha Priya <priya.harsha at 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 <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include "../../../drivers/staging/intel_sst/intel_sst.h"
+#include "mid_platform.h"
+
+static struct snd_pcm_hardware snd_intelmad_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 = MID_MIN_RATE,
+ .rate_max = MID_MAX_RATE,
+ .channels_min = MID_MIN_CHANNEL,
+ .channels_max = MID_MAX_CHANNEL,
+ .buffer_bytes_max = MID_MAX_BUFFER,
+ .period_bytes_min = MID_MIN_PERIOD_BYTES,
+ .period_bytes_max = MID_MAX_PERIOD_BYTES,
+ .periods_min = MID_MIN_PERIODS,
+ .periods_max = MID_MAX_PERIODS,
+ .fifo_size = MID_FIFO_SIZE,
+};
+
+/*MFLD - MSIC*/
+struct snd_soc_dai_driver mfld_dai[] = {
+{
+ .name = "Headset-cpu-dai",
+ .id = 0,
+ .playback = {
+ .channels_min = MID_STEREO,
+ .channels_max = MID_STEREO,
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S24_LE,
+ },
+},
+{
+ .name = "Speaker-cpu-dai",
+ .id = 1,
+ .playback = {
+ .channels_min = MID_MONO,
+ .channels_max = MID_STEREO,
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S24_LE,
+ },
+},
+{
+ .name = "Vibra 1-cpu-dai",
+ .id = 2,
+ .playback = {
+ .channels_min = MID_MONO,
+ .channels_max = MID_MONO,
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S24_LE,
+ },
+},
+{
+ .name = "Vibra 2-cpu-dai",
+ .id = 3,
+ .playback = {
+ .channels_min = MID_MONO,
+ .channels_max = MID_STEREO,
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S24_LE,
+ },
+},
+};
+
+static int mid_platform_open(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime;
+ struct mid_runtime_stream *stream;
+ int ret_val = 0;
+
+ pr_debug("mid_platform_open called\n");
+
+ runtime = substream->runtime;
+ runtime->hw = snd_intelmad_pcm_hw;
+
+ stream = kzalloc(sizeof(*stream), GFP_KERNEL);
+ if (!stream)
+ return -ENOMEM;
+ stream->stream_info.str_id = 0;
+ stream->stream_status = 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->scard_ops = NULL;
+ stream->sstdrv_ops->vendor_id = MSIC_VENDOR_ID;
+ stream->sstdrv_ops->module_name = "msic_audio";
+
+ /* 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 mid_platform_close(struct snd_pcm_substream *substream)
+{
+ struct mid_runtime_stream *stream;
+ int ret_val = 0, str_id;
+
+ pr_debug("mid_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 mid_platform_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct mid_runtime_stream *stream;
+ int ret_val = 0, str_id;
+
+ pr_debug("mid_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 = snd_intelmad_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 = snd_intelmad_init_stream(substream);
+ if (ret_val)
+ return ret_val;
+ substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
+ return ret_val;
+}
+
+static int mid_platform_pcm_trigger(struct snd_pcm_substream *substream,
+ int cmd)
+{
+ int ret_val = 0, str_id;
+ struct mid_runtime_stream *stream;
+
+ pr_debug("mid_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)
+ return ret_val;
+ stream->stream_status = RUNNING;
+ 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)
+ return ret_val;
+ stream->stream_status = DROPPED;
+ 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)
+ return ret_val;
+ stream->stream_status = PAUSED;
+ 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)
+ return ret_val;
+ stream->stream_status = RUNNING;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return ret_val;
+}
+
+
+static snd_pcm_uframes_t mid_platform_pcm_pointer
+ (struct snd_pcm_substream *substream)
+{
+ /* struct snd_pcm_runtime *runtime = substream->runtime; */
+ struct mid_runtime_stream *stream;
+ int ret_val;
+ struct pcm_stream_info *str_info;
+
+ pr_debug("mid_platform_pcm_pointer called\n");
+
+ stream = substream->runtime->private_data;
+ if (stream->stream_status == INIT)
+ return 0;
+ 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 = 0x%x\n", ret_val);
+ return ret_val;
+ }
+
+ return stream->stream_info.buffer_ptr;
+}
+
+
+static struct snd_pcm_ops intel_mid_platform_ops = {
+ .open = mid_platform_open,
+ .close = mid_platform_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .prepare = mid_platform_pcm_prepare,
+ .trigger = mid_platform_pcm_trigger,
+ .pointer = mid_platform_pcm_pointer,
+};
+
+static void intel_mid_pcm_free(struct snd_pcm *pcm)
+{
+ pr_debug("intel_mid_pcm_free called\n");
+ snd_pcm_lib_preallocate_free_for_all(pcm);
+}
+
+int intel_mid_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
+ struct snd_pcm *pcm)
+{
+ int retval = 0;
+
+ pr_debug("intel_mid_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),
+ MID_MIN_BUFFER, MID_MAX_BUFFER);
+ if (retval) {
+ pr_err("dma buffer allocationf fail\n");
+ return retval;
+ }
+ }
+
+ return retval;
+}
+struct snd_soc_platform_driver intelmid_soc_platform_drv = {
+ .ops = &intel_mid_platform_ops,
+ .pcm_new = intel_mid_pcm_new,
+ .pcm_free = intel_mid_pcm_free,
+};
+
+static int intelmid_platform_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ pr_debug("intelmid_platform_probe called\n");
+ ret = snd_soc_register_platform(&pdev->dev, &intelmid_soc_platform_drv);
+ if (ret) {
+ pr_err("registering soc platform failed\n");
+ return ret;
+ }
+ return snd_soc_register_dais(&pdev->dev,
+ mfld_dai, ARRAY_SIZE(mfld_dai));
+}
+
+static int intelmid_platform_remove(struct platform_device *pdev)
+{
+
+ snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(mfld_dai));
+
+ snd_soc_unregister_platform(&pdev->dev);
+ pr_debug("intelmid_platform_remove sucess\n");
+
+ return 0;
+}
+
+static struct platform_driver intelmid_platform_driver = {
+ .driver = {
+ .name = "mid-audio-platform",
+ .owner = THIS_MODULE,
+ },
+ .probe = intelmid_platform_probe,
+ .remove = intelmid_platform_remove,
+};
+
+static int __init intel_mid_soc_platform_init(void)
+{
+ pr_debug("intel_mid_soc_platform_init called\n");
+ return platform_driver_register(&intelmid_platform_driver);
+}
+module_init(intel_mid_soc_platform_init);
+
+static void __exit intel_mid_soc_platform_exit(void)
+{
+ platform_driver_unregister(&intelmid_platform_driver);
+ pr_debug("intel_mid_soc_platform_exit sucess\n");
+}
+module_exit(intel_mid_soc_platform_exit);
+
+MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
+MODULE_AUTHOR("Vinod Koul <vinod.koul at intel.com>");
+MODULE_AUTHOR("Harsha Priya <priya.harsha at intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("mid-platform");
diff --git a/sound/soc/mid-x86/mid_platform.h b/sound/soc/mid-x86/mid_platform.h
new file mode 100644
index 0000000..e042266
--- /dev/null
+++ b/sound/soc/mid-x86/mid_platform.h
@@ -0,0 +1,71 @@
+/*
+ * mid_platform.h - Intel MID Platform driver header file
+ *
+ * Copyright (C) 2010 Intel Corp
+ * Author: Vinod Koul <vinod.koul at intel.com>
+ * Author: Harsha Priya <priya.harsha at 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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *
+ */
+
+#ifndef __MID_PLATFORMDRV_H__
+#define __MID_PLATFORMDRV_H__
+
+#define MID_MONO 1
+#define MID_STEREO 2
+#define MID_MAX_CAP 5
+
+#define MID_MIN_RATE 8000
+#define MID_MAX_RATE 48000
+#define MID_MIN_CHANNEL 1
+#define MID_MAX_CHANNEL 5
+#define MID_MAX_BUFFER (800*1024)
+#define MID_MIN_BUFFER (800*1024)
+#define MID_MIN_PERIOD_BYTES 32
+#define MID_MAX_PERIOD_BYTES MID_MAX_BUFFER
+#define MID_MIN_PERIODS 2
+#define MID_MAX_PERIODS (1024*2)
+#define MID_FIFO_SIZE 0
+#define SST_CARD_NAMES "intel_mid_card"
+#define MSIC_VENDOR_ID 3
+
+int snd_intelmad_alloc_stream(struct snd_pcm_substream *substream);
+int snd_intelmad_init_stream(struct snd_pcm_substream *substream);
+
+struct mid_runtime_stream {
+ int stream_status;
+ struct pcm_stream_info stream_info;
+ struct intel_sst_card_ops *sstdrv_ops;
+ unsigned long long buffer_ptr;
+};
+
+struct mid_dev_data {
+ struct snd_soc_dai_driver *dai;
+ int num_dais;
+};
+
+enum mid_drv_status {
+ INIT = 1,
+ STARTED,
+ RUNNING,
+ PAUSED,
+ DROPPED,
+};
+
+#endif
diff --git a/sound/soc/mid-x86/mid_platform_lib.c b/sound/soc/mid-x86/mid_platform_lib.c
new file mode 100644
index 0000000..531bf81
--- /dev/null
+++ b/sound/soc/mid-x86/mid_platform_lib.c
@@ -0,0 +1,122 @@
+/*
+ * mid_platform_lib.c - Intel MID Platform driver lib functions
+ *
+ * Copyright (C) 2010 Intel Corp
+ * Author: Vinod Koul <vinod.koul at intel.com>
+ * Author: Harsha Priya <priya.harsha at 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/io.h>
+#include <sound/pcm.h>
+#include "../../../drivers/staging/intel_sst/intel_sst.h"
+#include "../../../drivers/staging/intel_sst/intel_sst_ioctl.h"
+#include "mid_platform.h"
+
+int snd_intelmad_alloc_stream(struct snd_pcm_substream *substream)
+{
+ struct mid_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;
+}
+
+
+void period_elapsed(void *mad_substream)
+{
+ struct snd_pcm_substream *substream = mad_substream;
+ struct mid_runtime_stream *stream;
+
+ if (!substream || !substream->runtime)
+ return;
+ stream = substream->runtime->private_data;
+ if (!stream)
+ return;
+
+ if (stream->stream_status != RUNNING)
+ return;
+ pr_debug("calling period elapsed\n");
+ snd_pcm_period_elapsed(substream);
+ return;
+}
+
+int snd_intelmad_init_stream(struct snd_pcm_substream *substream)
+{
+ struct mid_runtime_stream *stream =
+ substream->runtime->private_data;
+ int ret_val;
+
+ pr_debug("setting buffer ptr param\n");
+ stream->stream_status = INIT;
+ stream->stream_info.period_elapsed = 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;
+
+}
--
1.7.2.3
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