new file mode 100644
@@ -0,0 +1,586 @@
+/*
+ * hda-skl-pcm.c -ASoC HDA Platform driver file implementing PCM functionality
+ *
+ * Copyright (C) 2014-2015 Intel Corp
+ * Author: Jeeja KP <jeeja.kp@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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ */
+#include <linux/pci.h>
+#include <linux/pm_runtime.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include "hda-skl.h"
+
+#define HDA_MONO 1
+#define HDA_STEREO 2
+
+static struct snd_pcm_hardware azx_pcm_hw = {
+ .info = (SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_PAUSE |
+ SNDRV_PCM_INFO_SYNC_START |
+ SNDRV_PCM_INFO_HAS_WALL_CLOCK | /* legacy */
+ SNDRV_PCM_INFO_HAS_LINK_ATIME |
+ SNDRV_PCM_INFO_NO_PERIOD_WAKEUP),
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .rates = SNDRV_PCM_RATE_48000,
+ .rate_min = 48000,
+ .rate_max = 48000,
+ .channels_min = 2,
+ .channels_max = 2,
+ .buffer_bytes_max = AZX_MAX_BUF_SIZE,
+ .period_bytes_min = 128,
+ .period_bytes_max = AZX_MAX_BUF_SIZE / 2,
+ .periods_min = 2,
+ .periods_max = AZX_MAX_FRAG,
+ .fifo_size = 0,
+};
+
+static inline
+struct soc_hdac_stream *get_hdac_stream(struct snd_pcm_substream *substream)
+{
+ return substream->runtime->private_data;
+}
+
+static struct soc_hdac_bus *get_bus_ctx(struct snd_pcm_substream *substream)
+{
+ struct soc_hdac_stream *stream = get_hdac_stream(substream);
+ struct hdac_stream *hstream = hdac_stream(stream);
+ struct hdac_bus *bus = hstream->bus;
+
+ return bus_to_soc_hdac_bus(bus);
+}
+
+static int substream_alloc_pages(struct soc_hdac_bus *sbus,
+ struct snd_pcm_substream *substream,
+ size_t size)
+{
+ struct soc_hdac_stream *stream = get_hdac_stream(substream);
+ int ret;
+
+ hdac_stream(stream)->bufsize = 0;
+ hdac_stream(stream)->period_bytes = 0;
+ hdac_stream(stream)->format_val = 0;
+
+ ret = snd_pcm_lib_malloc_pages(substream, size);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int substream_free_pages(struct hdac_bus *bus,
+ struct snd_pcm_substream *substream)
+{
+ return snd_pcm_lib_free_pages(substream);
+}
+
+static void soc_hda_set_pcm_constrains(struct soc_hdac_bus *sbus,
+ struct snd_pcm_runtime *runtime)
+{
+ snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+
+ /* avoid wrap-around with wall-clock */
+ snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
+ 20, 178000000);
+}
+
+static int soc_hda_pcm_open(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct soc_hdac_bus *sbus = dev_get_drvdata(dai->dev);
+ struct soc_hdac_stream *stream;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct soc_hda_dma_params *dma_params;
+
+ dev_dbg(dai->dev, "%s: %s\n", __func__, dai->name);
+ pm_runtime_get_sync(dai->dev);
+
+ stream = snd_soc_hdac_stream_assign(sbus, substream,
+ HDAC_STREAM_TYPE_COUPLED);
+ if (stream == NULL)
+ return -EBUSY;
+
+ soc_hda_set_pcm_constrains(sbus, runtime);
+
+ /*
+ * disable WALLCLOCK timestamps for capture streams
+ * until we figure out how to handle digital inputs
+ */
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+ runtime->hw.info &= ~SNDRV_PCM_INFO_HAS_WALL_CLOCK; /* legacy */
+ runtime->hw.info &= ~SNDRV_PCM_INFO_HAS_LINK_ATIME;
+ }
+
+ runtime->private_data = stream;
+
+ dma_params = kzalloc(sizeof(*dma_params), GFP_KERNEL);
+ if (!dma_params)
+ return -ENOMEM;
+
+ dma_params->stream_tag = hdac_stream(stream)->stream_tag;
+ snd_soc_dai_set_dma_data(dai, substream, (void *)dma_params);
+
+ dev_dbg(dai->dev, "stream tag set in dma params=%d\n",
+ dma_params->stream_tag);
+ snd_pcm_set_sync(substream);
+
+ return 0;
+}
+
+static int hda_get_format(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
+ struct soc_hda_dma_params *dma_params;
+ int format_val = 0;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+
+ dma_params = (struct soc_hda_dma_params *)
+ snd_soc_dai_get_dma_data(codec_dai, substream);
+
+ if (!dma_params)
+ format_val = dma_params->format;
+
+ return format_val;
+}
+
+static int soc_hda_pcm_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct soc_hdac_stream *stream = get_hdac_stream(substream);
+ unsigned int format_val;
+ int err;
+
+ dev_dbg(dai->dev, "%s: %s\n", __func__, dai->name);
+ if (hdac_stream(stream)->prepared) {
+ dev_dbg(dai->dev, "already stream is prepared - returning\n");
+ return 0;
+ }
+
+ format_val = hda_get_format(substream, dai);
+ dev_dbg(dai->dev, "stream_tag=%d formatvalue=%d\n",
+ hdac_stream(stream)->stream_tag, format_val);
+ snd_hdac_stream_reset(hdac_stream(stream));
+
+ err = snd_hdac_stream_set_params(hdac_stream(stream), format_val);
+
+ if (err < 0)
+ return err;
+
+ snd_hdac_stream_setup(hdac_stream(stream));
+ hdac_stream(stream)->prepared = 1;
+
+ return err;
+}
+
+static int soc_hda_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct soc_hdac_bus *sbus = dev_get_drvdata(dai->dev);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int ret;
+
+ dev_dbg(dai->dev, "%s: %s\n", __func__, dai->name);
+ ret = substream_alloc_pages(sbus, substream,
+ params_buffer_bytes(params));
+
+ if (ret < 0)
+ return ret;
+
+ if (substream->runtime->dma_area)
+ memset(substream->runtime->dma_area, 0,
+ params_buffer_bytes(params));
+
+ dev_dbg(dai->dev, "format_val, rate=%d, ch=%d, format=%d\n",
+ runtime->rate, runtime->channels, runtime->format);
+
+ return ret;
+}
+
+static void soc_hda_pcm_close(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct soc_hdac_stream *stream = get_hdac_stream(substream);
+ struct soc_hda_dma_params *dma_params = NULL;
+
+ dev_dbg(dai->dev, "%s: %s\n", __func__, dai->name);
+ snd_soc_hdac_stream_release(stream, HDAC_STREAM_TYPE_COUPLED);
+
+ dma_params = (struct soc_hda_dma_params *)
+ snd_soc_dai_get_dma_data(dai, substream);
+
+ pm_runtime_mark_last_busy(dai->dev);
+ pm_runtime_put_autosuspend(dai->dev);
+ kfree(dma_params);
+}
+
+static int soc_hda_pcm_hw_free(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct soc_hdac_bus *sbus = dev_get_drvdata(dai->dev);
+ struct soc_hdac_stream *stream = get_hdac_stream(substream);
+
+ dev_dbg(dai->dev, "%s: %s\n", __func__, dai->name);
+
+ snd_hdac_stream_cleanup(hdac_stream(stream));
+ hdac_stream(stream)->prepared = 0;
+
+ return substream_free_pages(hdac_bus(sbus), substream);
+}
+
+static struct snd_soc_dai_ops hda_pcm_dai_ops = {
+ .startup = soc_hda_pcm_open,
+ .shutdown = soc_hda_pcm_close,
+ .prepare = soc_hda_pcm_prepare,
+ .hw_params = soc_hda_pcm_hw_params,
+ .hw_free = soc_hda_pcm_hw_free,
+};
+
+static struct snd_soc_dai_driver soc_hda_platform_dai[] = {
+{
+ .name = "System Pin",
+ .ops = &hda_pcm_dai_ops,
+ .playback = {
+ .stream_name = "System Playback",
+ .channels_min = HDA_MONO,
+ .channels_max = HDA_STEREO,
+ .rates = SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_8000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
+ },
+ .capture = {
+ .stream_name = "System Capture",
+ .channels_min = HDA_MONO,
+ .channels_max = HDA_STEREO,
+ .rates = SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_16000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
+ },
+},
+{
+ .name = "Deepbuffer Pin",
+ .ops = &hda_pcm_dai_ops,
+ .playback = {
+ .stream_name = "Deepbuffer Playback",
+ .channels_min = HDA_STEREO,
+ .channels_max = HDA_STEREO,
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
+ },
+},
+{
+ .name = "LowLatency Pin",
+ .ops = &hda_pcm_dai_ops,
+ .playback = {
+ .stream_name = "Low Latency Playback",
+ .channels_min = HDA_STEREO,
+ .channels_max = HDA_STEREO,
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
+ },
+},
+};
+
+static int soc_hda_platform_open(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai_link *dai_link = rtd->dai_link;
+
+ dev_dbg(rtd->cpu_dai->dev, "In %s:%s\n", __func__,
+ dai_link->cpu_dai_name);
+
+ runtime = substream->runtime;
+ snd_soc_set_runtime_hwparams(substream, &azx_pcm_hw);
+ return 0;
+}
+
+static int soc_hda_platform_pcm_trigger(struct snd_pcm_substream *substream,
+ int cmd)
+{
+ struct soc_hdac_bus *sbus = get_bus_ctx(substream);
+ struct hdac_bus *bus = hdac_bus(sbus);
+ struct soc_hdac_stream *stream;
+ struct snd_pcm_substream *s;
+ bool start;
+ int sbits = 0;
+ unsigned long cookie;
+ struct hdac_stream *hstr;
+
+ stream = get_hdac_stream(substream);
+ hstr = hdac_stream(stream);
+
+ dev_dbg(bus->dev, "In %s cmd=%d\n", __func__, cmd);
+
+ if (!hstr->prepared)
+ return -EPIPE;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ start = true;
+ break;
+
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_STOP:
+ start = false;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ snd_pcm_group_for_each_entry(s, substream) {
+ if (s->pcm->card != substream->pcm->card)
+ continue;
+ stream = get_hdac_stream(s);
+ sbits |= 1 << hdac_stream(stream)->index;
+ snd_pcm_trigger_done(s, substream);
+ }
+
+ spin_lock_irqsave(&bus->reg_lock, cookie);
+
+ /* first, set SYNC bits of corresponding streams */
+ snd_hdac_stream_sync_trigger(hstr, true, sbits, AZX_REG_SSYNC);
+
+ snd_pcm_group_for_each_entry(s, substream) {
+ if (s->pcm->card != substream->pcm->card)
+ continue;
+ stream = get_hdac_stream(s);
+ if (start)
+ snd_hdac_stream_start(hdac_stream(stream), true);
+ else
+ snd_hdac_stream_stop(hdac_stream(stream));
+ }
+ spin_unlock_irqrestore(&bus->reg_lock, cookie);
+
+ snd_hdac_stream_sync(hstr, start, sbits);
+
+ spin_lock_irqsave(&bus->reg_lock, cookie);
+
+ /* reset SYNC bits */
+ snd_hdac_stream_sync_trigger(hstr, false, sbits, AZX_REG_SSYNC);
+ if (start)
+ snd_hdac_stream_timecounter_init(hstr, sbits);
+ spin_unlock_irqrestore(&bus->reg_lock, cookie);
+ return 0;
+}
+
+/* calculate runtime delay from LPIB */
+static int hda_get_delay_from_lpib(struct soc_hdac_bus *sbus,
+ struct soc_hdac_stream *sstream,
+ unsigned int pos)
+{
+ struct hdac_bus *bus = hdac_bus(sbus);
+ struct hdac_stream *hstream = hdac_stream(sstream);
+ struct snd_pcm_substream *substream = hstream->substream;
+ int stream = substream->stream;
+ unsigned int lpib_pos = snd_hdac_stream_get_pos_lpib(hstream);
+ int delay;
+
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+ delay = pos - lpib_pos;
+ else
+ delay = lpib_pos - pos;
+ if (delay < 0) {
+ if (delay >= hstream->delay_negative_threshold)
+ delay = 0;
+ else
+ delay += hstream->bufsize;
+ }
+
+ if (delay >= hstream->period_bytes) {
+ dev_info(bus->dev,
+ "Unstable LPIB (%d >= %d); disabling LPIB delay counting\n",
+ delay, hstream->period_bytes);
+ delay = 0;
+ }
+
+ return bytes_to_frames(substream->runtime, delay);
+}
+
+static unsigned int hda_get_position(struct soc_hdac_stream *hstream,
+ int codec_delay)
+{
+ struct hdac_stream *hstr = hdac_stream(hstream);
+ struct snd_pcm_substream *substream = hstr->substream;
+ struct soc_hdac_bus *sbus = get_bus_ctx(substream);
+ unsigned int pos;
+ int delay = 0;
+
+ /* use the position buffer as default */
+ pos = snd_hdac_stream_get_pos_posbuf(hdac_stream(hstream));
+
+ if (pos >= hdac_stream(hstream)->bufsize)
+ pos = 0;
+
+ if (substream->runtime) {
+ delay = hda_get_delay_from_lpib(sbus, hstream, pos)
+ + codec_delay;
+ substream->runtime->delay += delay;
+ }
+
+ return pos;
+}
+
+static snd_pcm_uframes_t soc_hda_platform_pcm_pointer
+ (struct snd_pcm_substream *substream)
+{
+ struct soc_hdac_stream *hstream = get_hdac_stream(substream);
+
+ return bytes_to_frames(substream->runtime,
+ hda_get_position(hstream, 0));
+}
+
+static u64 soc_azx_adjust_codec_delay(struct snd_pcm_substream *substream,
+ u64 nsec)
+{
+ struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ u64 codec_frames, codec_nsecs;
+
+ if (!codec_dai->driver->ops->delay)
+ return nsec;
+
+ codec_frames = codec_dai->driver->ops->delay(substream, codec_dai);
+ codec_nsecs = div_u64(codec_frames * 1000000000LL,
+ substream->runtime->rate);
+
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ return nsec + codec_nsecs;
+
+ return (nsec > codec_nsecs) ? nsec - codec_nsecs : 0;
+}
+
+static int soc_hda_get_time_info(struct snd_pcm_substream *substream,
+ struct timespec *system_ts, struct timespec *audio_ts,
+ struct snd_pcm_audio_tstamp_config *audio_tstamp_config,
+ struct snd_pcm_audio_tstamp_report *audio_tstamp_report)
+{
+ struct soc_hdac_stream *sstream = get_hdac_stream(substream);
+ struct hdac_stream *hstr = hdac_stream(sstream);
+ u64 nsec;
+
+ if ((substream->runtime->hw.info & SNDRV_PCM_INFO_HAS_LINK_ATIME) &&
+ (audio_tstamp_config->type_requested == SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK)) {
+
+ snd_pcm_gettime(substream->runtime, system_ts);
+
+ nsec = timecounter_read(&hstr->tc);
+ nsec = div_u64(nsec, 3); /* can be optimized */
+ if (audio_tstamp_config->report_delay)
+ nsec = soc_azx_adjust_codec_delay(substream, nsec);
+
+ *audio_ts = ns_to_timespec(nsec);
+
+ audio_tstamp_report->actual_type = SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK;
+ audio_tstamp_report->accuracy_report = 1; /* rest of struct is valid */
+ audio_tstamp_report->accuracy = 42; /* 24MHzWallClk == 42ns resolution */
+
+ } else
+ audio_tstamp_report->actual_type = SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT;
+
+ return 0;
+}
+
+static struct snd_pcm_ops soc_hda_platform_ops = {
+ .open = soc_hda_platform_open,
+ .ioctl = snd_pcm_lib_ioctl,
+ .trigger = soc_hda_platform_pcm_trigger,
+ .pointer = soc_hda_platform_pcm_pointer,
+ .get_time_info = soc_hda_get_time_info,
+ .mmap = snd_pcm_lib_default_mmap,
+ .page = snd_pcm_sgbuf_ops_page,
+};
+
+static void soc_hda_pcm_free(struct snd_pcm *pcm)
+{
+ snd_pcm_lib_preallocate_free_for_all(pcm);
+}
+
+#define MAX_PREALLOC_SIZE (32 * 1024 * 1024)
+
+static int soc_hda_pcm_new(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_dai *dai = rtd->cpu_dai;
+ struct soc_hdac_bus *sbus = dev_get_drvdata(dai->dev);
+ struct snd_pcm *pcm = rtd->pcm;
+ unsigned int size;
+ int retval = 0;
+ struct hda_skl *hda = to_hda_skl(sbus);
+
+ dev_dbg(dai->dev, "In %s\n", __func__);
+ if (dai->driver->playback.channels_min ||
+ dai->driver->capture.channels_min) {
+ /* buffer pre-allocation */
+ size = CONFIG_SND_SOC_HDA_PREALLOC_SIZE * 1024;
+ if (size > MAX_PREALLOC_SIZE)
+ size = MAX_PREALLOC_SIZE;
+ retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
+ SNDRV_DMA_TYPE_DEV_SG,
+ snd_dma_pci_data(hda->pci),
+ size, MAX_PREALLOC_SIZE);
+ if (retval) {
+ dev_err(dai->dev, "dma buffer allocationf fail\n");
+ return retval;
+ }
+ }
+ return retval;
+}
+
+static struct snd_soc_platform_driver soc_hda_platform_drv = {
+ .ops = &soc_hda_platform_ops,
+ .pcm_new = soc_hda_pcm_new,
+ .pcm_free = soc_hda_pcm_free,
+};
+
+static const struct snd_soc_component_driver soc_hda_component = {
+ .name = "pcm",
+};
+
+int soc_hda_platform_register(struct device *dev)
+{
+ int ret;
+
+ ret = snd_soc_register_platform(dev, &soc_hda_platform_drv);
+ if (ret) {
+ dev_err(dev, "soc platform registration failed %d\n", ret);
+ return ret;
+ }
+ ret = snd_soc_register_component(dev, &soc_hda_component,
+ soc_hda_platform_dai,
+ ARRAY_SIZE(soc_hda_platform_dai));
+ if (ret) {
+ dev_err(dev, "soc component registration failed %d\n", ret);
+ snd_soc_unregister_platform(dev);
+ }
+
+ return ret;
+
+}
+
+int soc_hda_platform_unregister(struct device *dev)
+{
+ snd_soc_unregister_component(dev);
+ snd_soc_unregister_platform(dev);
+ return 0;
+}