[PATCH 3/3] ASoC: AMD: add AMD ASoC ACP-I2S driver [v4]
Alex Deucher
alexdeucher at gmail.com
Thu Aug 20 13:09:21 PDT 2015
From: Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu at amd.com>
ACP IP block consists of dedicated DMA and I2S blocks. The PCM driver
provides the DMA and CPU DAI components to ALSA core.
v2: squash in Kconfig fix
v3: squash additional commits, convert to mfd, drop rt286 changes
v4: squash in naming fixes
Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Reviewed-by: Murali Krishna Vemuri <murali-krishna.vemuri at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
sound/soc/Kconfig | 1 +
sound/soc/Makefile | 1 +
sound/soc/amd/Kconfig | 5 +
sound/soc/amd/Makefile | 3 +
sound/soc/amd/acp-pcm-dma.c | 676 ++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 686 insertions(+)
create mode 100644 sound/soc/amd/Kconfig
create mode 100644 sound/soc/amd/Makefile
create mode 100644 sound/soc/amd/acp-pcm-dma.c
diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig
index 2ae9619..1b9ce31 100644
--- a/sound/soc/Kconfig
+++ b/sound/soc/Kconfig
@@ -32,6 +32,7 @@ config SND_SOC_GENERIC_DMAENGINE_PCM
# All the supported SoCs
source "sound/soc/adi/Kconfig"
+source "sound/soc/amd/Kconfig"
source "sound/soc/atmel/Kconfig"
source "sound/soc/au1x/Kconfig"
source "sound/soc/bcm/Kconfig"
diff --git a/sound/soc/Makefile b/sound/soc/Makefile
index e189903..a6cbb99 100644
--- a/sound/soc/Makefile
+++ b/sound/soc/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_SND_SOC) += snd-soc-core.o
obj-$(CONFIG_SND_SOC) += codecs/
obj-$(CONFIG_SND_SOC) += generic/
obj-$(CONFIG_SND_SOC) += adi/
+obj-$(CONFIG_SND_SOC) += amd/
obj-$(CONFIG_SND_SOC) += atmel/
obj-$(CONFIG_SND_SOC) += au1x/
obj-$(CONFIG_SND_SOC) += bcm/
diff --git a/sound/soc/amd/Kconfig b/sound/soc/amd/Kconfig
new file mode 100644
index 0000000..ce39979
--- /dev/null
+++ b/sound/soc/amd/Kconfig
@@ -0,0 +1,5 @@
+config SND_SOC_AMD_ACP
+ tristate "AMD Audio Coprocessor support"
+ depends on MFD_CORE
+ help
+ This option enables ACP support (DMA,I2S) on AMD platforms.
diff --git a/sound/soc/amd/Makefile b/sound/soc/amd/Makefile
new file mode 100644
index 0000000..1a66ec0
--- /dev/null
+++ b/sound/soc/amd/Makefile
@@ -0,0 +1,3 @@
+snd-soc-acp-pcm-objs := acp-pcm-dma.o
+
+obj-$(CONFIG_SND_SOC_AMD_ACP) += snd-soc-acp-pcm.o
diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c
new file mode 100644
index 0000000..18cc60c
--- /dev/null
+++ b/sound/soc/amd/acp-pcm-dma.c
@@ -0,0 +1,676 @@
+/*
+ * AMD ALSA SoC PCM Driver
+ *
+ * Copyright 2014-2015 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ *
+ */
+
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/pci.h>
+#include <linux/pm_runtime.h>
+#include <linux/mfd/amd_acp.h>
+
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#define PLAYBACK_MIN_NUM_PERIODS 2
+#define PLAYBACK_MAX_NUM_PERIODS 2
+#define PLAYBACK_MAX_PERIOD_SIZE 16384
+#define PLAYBACK_MIN_PERIOD_SIZE 1024
+#define CAPTURE_MIN_NUM_PERIODS 2
+#define CAPTURE_MAX_NUM_PERIODS 2
+#define CAPTURE_MAX_PERIOD_SIZE 16384
+#define CAPTURE_MIN_PERIOD_SIZE 1024
+
+#define NUM_DSCRS_PER_CHANNEL 2
+
+#define MAX_BUFFER (PLAYBACK_MAX_PERIOD_SIZE * PLAYBACK_MAX_NUM_PERIODS)
+#define MIN_BUFFER MAX_BUFFER
+
+#define TWO_CHANNEL_SUPPORT 2 /* up to 2.0 */
+#define FOUR_CHANNEL_SUPPORT 4 /* up to 3.1 */
+#define SIX_CHANNEL_SUPPORT 6 /* up to 5.1 */
+#define EIGHT_CHANNEL_SUPPORT 8 /* up to 7.1 */
+
+
+static const struct snd_pcm_hardware acp_pcm_hardware_playback = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH |
+ SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
+ /* formats,rates,channels based on i2s doc. */
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
+ .channels_min = 1,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_8000_96000,
+ .rate_min = 8000,
+ .rate_max = 96000,
+ .buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE,
+ .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
+ .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
+ .periods_min = PLAYBACK_MIN_NUM_PERIODS,
+ .periods_max = PLAYBACK_MAX_NUM_PERIODS,
+};
+
+static const struct snd_pcm_hardware acp_pcm_hardware_capture = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH |
+ SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
+ /* formats,rates,channels based on i2s doc. */
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_48000,
+ .rate_min = 8000,
+ .rate_max = 48000,
+ .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
+ .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
+ .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
+ .periods_min = CAPTURE_MIN_NUM_PERIODS,
+ .periods_max = CAPTURE_MAX_NUM_PERIODS,
+};
+
+struct audio_drv_data {
+ struct snd_pcm_substream *play_stream;
+ struct snd_pcm_substream *capture_stream;
+ struct amd_acp_device *acp_dev;
+ struct acp_irq_prv *iprv;
+};
+
+static const struct snd_soc_component_driver dw_i2s_component = {
+ .name = "dw-i2s",
+};
+
+static void acp_pcm_period_elapsed(struct device *dev, u16 play_intr,
+ u16 capture_intr)
+{
+ struct snd_pcm_substream *substream;
+ struct audio_drv_data *irq_data = dev_get_drvdata(dev);
+
+ /* Inform ALSA about the period elapsed (one out of two periods) */
+ if (play_intr)
+ substream = irq_data->play_stream;
+ else
+ substream = irq_data->capture_stream;
+
+ if (substream->runtime && snd_pcm_running(substream))
+ snd_pcm_period_elapsed(substream);
+}
+
+static int acp_dma_open(struct snd_pcm_substream *substream)
+{
+ int ret = 0;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *prtd = substream->private_data;
+ struct audio_drv_data *intr_data = dev_get_drvdata(prtd->platform->dev);
+
+ struct audio_substream_data *adata =
+ kzalloc(sizeof(struct audio_substream_data), GFP_KERNEL);
+ if (adata == NULL)
+ return -ENOMEM;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ runtime->hw = acp_pcm_hardware_playback;
+ else
+ runtime->hw = acp_pcm_hardware_capture;
+
+ ret = snd_pcm_hw_constraint_integer(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+ if (ret < 0) {
+ dev_err(prtd->platform->dev, "set integer constraint failed\n");
+ return ret;
+ }
+
+ adata->acp_dev = intr_data->acp_dev;
+ runtime->private_data = adata;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ intr_data->play_stream = substream;
+ else
+ intr_data->capture_stream = substream;
+
+ return 0;
+}
+
+static int acp_dma_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ int status;
+ uint64_t size;
+ struct snd_dma_buffer *dma_buffer;
+ struct page *pg;
+ u16 num_of_pages;
+ struct snd_pcm_runtime *runtime;
+ struct audio_substream_data *rtd;
+ struct amd_acp_device *acp_dev;
+
+ dma_buffer = &substream->dma_buffer;
+
+ runtime = substream->runtime;
+ rtd = runtime->private_data;
+
+ if (WARN_ON(!rtd))
+ return -EINVAL;
+ acp_dev = rtd->acp_dev;
+
+ size = params_buffer_bytes(params);
+ status = snd_pcm_lib_malloc_pages(substream, size);
+ if (status < 0)
+ return status;
+
+ memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
+ pg = virt_to_page(substream->dma_buffer.area);
+
+ if (NULL != pg) {
+ /* Save for runtime private data */
+ rtd->pg = pg;
+ rtd->order = get_order(size);
+
+ /* Let ACP know the Allocated memory */
+ num_of_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
+
+ /* Fill the page table entries in ACP SRAM */
+ rtd->pg = pg;
+ rtd->size = size;
+ rtd->num_of_pages = num_of_pages;
+ rtd->direction = substream->stream;
+
+ acp_dev->config_dma(acp_dev, rtd);
+ status = 0;
+ } else {
+ status = -ENOMEM;
+ }
+ return status;
+}
+
+static int acp_dma_hw_free(struct snd_pcm_substream *substream)
+{
+ return snd_pcm_lib_free_pages(substream);
+}
+
+static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream)
+{
+ u32 pos = 0;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct audio_substream_data *rtd = runtime->private_data;
+ struct amd_acp_device *acp_dev = rtd->acp_dev;
+
+ pos = acp_dev->update_dma_pointer(acp_dev, substream->stream,
+ frames_to_bytes(runtime, runtime->period_size));
+ return bytes_to_frames(runtime, pos);
+
+}
+
+static int acp_dma_mmap(struct snd_pcm_substream *substream,
+ struct vm_area_struct *vma)
+{
+ return snd_pcm_lib_default_mmap(substream, vma);
+}
+
+static int acp_dma_prepare(struct snd_pcm_substream *substream)
+{
+ int ret;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct audio_substream_data *rtd = runtime->private_data;
+ struct amd_acp_device *acp_dev = rtd->acp_dev;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+
+ acp_dev->config_dma_channel(acp_dev, SYSRAM_TO_ACP_CH_NUM,
+ PLAYBACK_START_DMA_DESCR_CH12,
+ NUM_DSCRS_PER_CHANNEL, 0);
+ acp_dev->config_dma_channel(acp_dev, ACP_TO_I2S_DMA_CH_NUM,
+ PLAYBACK_START_DMA_DESCR_CH13,
+ NUM_DSCRS_PER_CHANNEL, 0);
+ /* Fill ACP SRAM (2 periods) with zeros from System RAM
+ * which is zero-ed in hw_params */
+ ret = acp_dev->dma_start(rtd->acp_dev,
+ SYSRAM_TO_ACP_CH_NUM, false);
+ if (ret < 0)
+ ret = -EFAULT;
+
+ /* Now configure DMA to transfer only first half of System RAM
+ * buffer before playback is triggered. This will overwrite
+ * zero-ed second half of SRAM buffer */
+ acp_dev->config_dma_channel(acp_dev, SYSRAM_TO_ACP_CH_NUM,
+ PLAYBACK_START_DMA_DESCR_CH12,
+ 1, 0);
+ } else {
+ acp_dev->config_dma_channel(acp_dev, ACP_TO_SYSRAM_CH_NUM,
+ CAPTURE_START_DMA_DESCR_CH14,
+ NUM_DSCRS_PER_CHANNEL, 0);
+ acp_dev->config_dma_channel(acp_dev, I2S_TO_ACP_DMA_CH_NUM,
+ CAPTURE_START_DMA_DESCR_CH15,
+ NUM_DSCRS_PER_CHANNEL, 0);
+ }
+ return 0;
+}
+
+static int acp_dma_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct audio_substream_data *rtd = runtime->private_data;
+ struct amd_acp_device *acp_dev = rtd->acp_dev;
+ int ret;
+
+ if (!rtd)
+ return -EINVAL;
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ ret = acp_dev->dma_start(rtd->acp_dev,
+ SYSRAM_TO_ACP_CH_NUM, false);
+ if (ret < 0)
+ return -EFAULT;
+ acp_dev->prebuffer_audio(rtd->acp_dev);
+
+ ret = acp_dev->dma_start(acp_dev,
+ ACP_TO_I2S_DMA_CH_NUM, true);
+ } else {
+ ret = acp_dev->dma_start(acp_dev,
+ I2S_TO_ACP_DMA_CH_NUM, true);
+ }
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ ret = acp_dev->dma_stop(acp_dev, SYSRAM_TO_ACP_CH_NUM);
+ if (0 == ret)
+ ret = acp_dev->dma_stop(acp_dev,
+ ACP_TO_I2S_DMA_CH_NUM);
+ } else {
+ ret = acp_dev->dma_stop(acp_dev, I2S_TO_ACP_DMA_CH_NUM);
+ if (0 == ret)
+ ret = acp_dev->dma_stop(acp_dev,
+ ACP_TO_SYSRAM_CH_NUM);
+ }
+ break;
+ default:
+ ret = -EINVAL;
+
+ }
+ return ret;
+}
+
+static int acp_dma_new(struct snd_soc_pcm_runtime *rtd)
+{
+ int ret;
+ struct snd_pcm *pcm;
+
+ pcm = rtd->pcm;
+ ret = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+ NULL, MIN_BUFFER, MAX_BUFFER);
+ return ret;
+}
+
+static int acp_dma_close(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct audio_substream_data *rtd = runtime->private_data;
+ struct snd_soc_pcm_runtime *prtd = substream->private_data;
+
+ kfree(rtd);
+
+ pm_runtime_mark_last_busy(prtd->platform->dev);
+ return 0;
+}
+
+static int acp_dai_i2s_hwparams(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *prtd = substream->private_data;
+ struct audio_substream_data *rtd = runtime->private_data;
+ struct amd_acp_device *acp_dev = rtd->acp_dev;
+ struct device *dev = prtd->platform->dev;
+ u32 chan_nr;
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ rtd->xfer_resolution = 0x02;
+ break;
+
+ case SNDRV_PCM_FORMAT_S24_LE:
+ rtd->xfer_resolution = 0x04;
+ break;
+
+ case SNDRV_PCM_FORMAT_S32_LE:
+ rtd->xfer_resolution = 0x05;
+ break;
+
+ default:
+ dev_err(dev, "unsuppted PCM fmt : %d\n", params_format(params));
+ return -EINVAL;
+ }
+
+ chan_nr = params_channels(params);
+
+ switch (chan_nr) {
+ case EIGHT_CHANNEL_SUPPORT:
+ rtd->ch_reg = 3;
+ break;
+ case SIX_CHANNEL_SUPPORT:
+ rtd->ch_reg = 2;
+ break;
+ case FOUR_CHANNEL_SUPPORT:
+ rtd->ch_reg = 1;
+ break;
+ case TWO_CHANNEL_SUPPORT:
+ rtd->ch_reg = 0;
+ break;
+ default:
+ dev_err(dev, "channel not supported : %d\n", chan_nr);
+ return -EINVAL;
+ }
+
+ rtd->direction = substream->stream;
+
+ acp_dev->config_i2s(acp_dev, rtd);
+
+ return 0;
+}
+
+static int acp_dai_i2s_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *dai)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct audio_substream_data *rtd = runtime->private_data;
+ struct amd_acp_device *acp_dev = rtd->acp_dev;
+ int ret;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ acp_dev->i2s_start(acp_dev, substream->stream);
+ ret = 0;
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ acp_dev->i2s_stop(acp_dev, substream->stream);
+ ret = 0;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int acp_dai_i2s_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct audio_substream_data *rtd = runtime->private_data;
+ struct amd_acp_device *acp_dev = rtd->acp_dev;
+
+ acp_dev->i2s_reset(acp_dev, substream->stream);
+ return 0;
+}
+
+static struct snd_pcm_ops acp_dma_ops = {
+ .open = acp_dma_open,
+ .close = acp_dma_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = acp_dma_hw_params,
+ .hw_free = acp_dma_hw_free,
+ .trigger = acp_dma_trigger,
+ .pointer = acp_dma_pointer,
+ .mmap = acp_dma_mmap,
+ .prepare = acp_dma_prepare,
+};
+
+static struct snd_soc_dai_ops acp_dai_i2s_ops = {
+ .prepare = acp_dai_i2s_prepare,
+ .hw_params = acp_dai_i2s_hwparams,
+ .trigger = acp_dai_i2s_trigger,
+};
+
+static struct snd_soc_dai_driver i2s_dai_driver = {
+ .playback = {
+ .stream_name = "I2S Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_96000,
+ .formats = SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+
+ .rate_min = 8000,
+ .rate_max = 96000,
+ },
+ .capture = {
+ .stream_name = "I2S Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_48000,
+ .formats = SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ .rate_min = 8000,
+ .rate_max = 48000,
+ },
+ .ops = &acp_dai_i2s_ops,
+};
+
+static struct snd_soc_platform_driver acp_asoc_platform = {
+ .ops = &acp_dma_ops,
+ .pcm_new = acp_dma_new,
+};
+
+static int acp_alsa_register(struct device *dev, struct amd_acp_device *acp_dev,
+ struct platform_device *pdev)
+{
+ int status;
+
+ status = snd_soc_register_platform(dev, &acp_asoc_platform);
+ if (0 != status) {
+ dev_err(dev, "Unable to register ALSA platform device\n");
+ goto exit_platform;
+ } else {
+ status = snd_soc_register_component(dev,
+ &dw_i2s_component,
+ &i2s_dai_driver, 1);
+
+ if (0 != status) {
+ dev_err(dev, "Unable to register i2s dai\n");
+ goto exit_dai;
+ } else {
+ dev_info(dev, "ACP device registered with ALSA\n");
+ return status;
+ }
+ }
+
+exit_dai:
+ snd_soc_unregister_platform(dev);
+exit_platform:
+ acp_dev->fini(acp_dev);
+ return status;
+}
+
+static int acp_audio_probe(struct platform_device *pdev)
+{
+ int status;
+ struct audio_drv_data *audio_drv_data;
+ struct amd_acp_device *acp_dev = dev_get_platdata(&pdev->dev);
+
+ audio_drv_data = devm_kzalloc(&pdev->dev, sizeof(struct audio_drv_data),
+ GFP_KERNEL);
+ if (audio_drv_data == NULL)
+ return -ENOMEM;
+
+ audio_drv_data->iprv = devm_kzalloc(&pdev->dev,
+ sizeof(struct acp_irq_prv),
+ GFP_KERNEL);
+ if (audio_drv_data->iprv == NULL)
+ return -ENOMEM;
+
+ /* The following members gets populated in device 'open'
+ * function. Till then interrupts are disabled in 'acp_hw_init'
+ * and device doesn't generate any interrupts.
+ */
+
+ audio_drv_data->play_stream = NULL;
+ audio_drv_data->capture_stream = NULL;
+ audio_drv_data->acp_dev = acp_dev;
+
+ audio_drv_data->iprv->dev = &pdev->dev;
+ audio_drv_data->iprv->acp_dev = acp_dev;
+ audio_drv_data->iprv->set_elapsed = acp_pcm_period_elapsed;
+
+ dev_set_drvdata(&pdev->dev, audio_drv_data);
+
+ /* Initialize the ACP */
+ status = acp_dev->init(acp_dev, audio_drv_data->iprv);
+
+ if (0 == status)
+ status = acp_alsa_register(&pdev->dev, acp_dev, pdev);
+ else
+ dev_err(&pdev->dev, "ACP initialization Failed\n");
+
+ pm_runtime_set_autosuspend_delay(&pdev->dev, 10000);
+ pm_runtime_use_autosuspend(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+
+ return status;
+}
+
+static int acp_audio_remove(struct platform_device *pdev)
+{
+ struct amd_acp_device *acp_dev = dev_get_platdata(&pdev->dev);
+
+ snd_soc_unregister_component(&pdev->dev);
+ snd_soc_unregister_platform(&pdev->dev);
+
+ acp_dev->fini(acp_dev);
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static int acp_pcm_suspend(struct device *dev)
+{
+ bool pm_rts;
+ struct audio_drv_data *adata = dev_get_drvdata(dev);
+
+ pm_rts = pm_runtime_status_suspended(dev);
+ if (pm_rts == false)
+ adata->acp_dev->fini(adata->acp_dev);
+
+ return 0;
+}
+
+static int acp_pcm_resume(struct device *dev)
+{
+ bool pm_rts;
+ struct snd_pcm_substream *pstream, *cstream;
+ struct snd_pcm_runtime *prtd, *crtd;
+ struct audio_substream_data *rtd;
+ struct audio_drv_data *adata = dev_get_drvdata(dev);
+
+ pm_rts = pm_runtime_status_suspended(dev);
+ if (pm_rts == true) {
+ /* Resumed from system wide suspend and there is
+ * no pending audio activity to resume. */
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ goto out;
+ }
+
+ pstream = adata->play_stream;
+ prtd = pstream ? pstream->runtime : NULL;
+ if (prtd != NULL) {
+ /* Resume playback stream from a suspended state */
+ rtd = prtd->private_data;
+
+ adata->acp_dev->config_dma(adata->acp_dev, rtd);
+ adata->acp_dev->config_i2s(adata->acp_dev, rtd);
+ }
+
+ cstream = adata->capture_stream;
+ crtd = cstream ? cstream->runtime : NULL;
+ if (crtd != NULL) {
+ /* Resume capture stream from a suspended state */
+ rtd = crtd->private_data;
+
+ adata->acp_dev->config_dma(adata->acp_dev, rtd);
+ adata->acp_dev->config_i2s(adata->acp_dev, rtd);
+ }
+out:
+ return 0;
+}
+
+static int acp_pcm_runtime_suspend(struct device *dev)
+{
+ struct audio_drv_data *adata = dev_get_drvdata(dev);
+
+ adata->acp_dev->acp_suspend(adata->acp_dev);
+ return 0;
+}
+
+static int acp_pcm_runtime_resume(struct device *dev)
+{
+ struct audio_drv_data *adata = dev_get_drvdata(dev);
+
+ adata->acp_dev->acp_resume(adata->acp_dev);
+ return 0;
+}
+
+static const struct dev_pm_ops acp_pm_ops = {
+ .suspend = acp_pcm_suspend,
+ .resume = acp_pcm_resume,
+ .runtime_suspend = acp_pcm_runtime_suspend,
+ .runtime_resume = acp_pcm_runtime_resume,
+};
+
+static struct platform_driver acp_dma_driver = {
+ .probe = acp_audio_probe,
+ .remove = acp_audio_remove,
+ .driver = {
+ .name = "acp-i2s-audio",
+ .pm = &acp_pm_ops,
+ },
+};
+
+module_platform_driver(acp_dma_driver);
+
+MODULE_AUTHOR("Maruthi.Bayyavarapu at amd.com");
+MODULE_DESCRIPTION("AMD ACP PCM Driver");
+MODULE_LICENSE("GPL and additional rights");
+MODULE_ALIAS("platform:acp-i2s-audio");
--
1.8.3.1
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