Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 608 insertions, 0 deletions

diff --git a/sound/soc/qcom/lpass-platform.c b/sound/soc/qcom/lpass-platform.c
new file mode 100644
index 000000000..1d06e2b7b
--- /dev/null
+++ b/sound/soc/qcom/lpass-platform.c
@@ -0,0 +1,608 @@
+/*
+ * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ * lpass-platform.c -- ALSA SoC platform driver for QTi LPASS
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/export.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <sound/pcm_params.h>
+#include <linux/regmap.h>
+#include <sound/soc.h>
+#include "lpass-lpaif-reg.h"
+#include "lpass.h"
+
+#define DRV_NAME "lpass-platform"
+
+struct lpass_pcm_data {
+	int dma_ch;
+	int i2s_port;
+};
+
+#define LPASS_PLATFORM_BUFFER_SIZE	(16 * 1024)
+#define LPASS_PLATFORM_PERIODS		2
+
+static const struct snd_pcm_hardware lpass_platform_pcm_hardware = {
+	.info			=	SNDRV_PCM_INFO_MMAP |
+					SNDRV_PCM_INFO_MMAP_VALID |
+					SNDRV_PCM_INFO_INTERLEAVED |
+					SNDRV_PCM_INFO_PAUSE |
+					SNDRV_PCM_INFO_RESUME,
+	.formats		=	SNDRV_PCM_FMTBIT_S16 |
+					SNDRV_PCM_FMTBIT_S24 |
+					SNDRV_PCM_FMTBIT_S32,
+	.rates			=	SNDRV_PCM_RATE_8000_192000,
+	.rate_min		=	8000,
+	.rate_max		=	192000,
+	.channels_min		=	1,
+	.channels_max		=	8,
+	.buffer_bytes_max	=	LPASS_PLATFORM_BUFFER_SIZE,
+	.period_bytes_max	=	LPASS_PLATFORM_BUFFER_SIZE /
+						LPASS_PLATFORM_PERIODS,
+	.period_bytes_min	=	LPASS_PLATFORM_BUFFER_SIZE /
+						LPASS_PLATFORM_PERIODS,
+	.periods_min		=	LPASS_PLATFORM_PERIODS,
+	.periods_max		=	LPASS_PLATFORM_PERIODS,
+	.fifo_size		=	0,
+};
+
+static int lpass_platform_pcmops_open(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+	struct snd_soc_dai *cpu_dai = soc_runtime->cpu_dai;
+	struct snd_soc_component *component = snd_soc_rtdcom_lookup(soc_runtime, DRV_NAME);
+	struct lpass_data *drvdata = snd_soc_component_get_drvdata(component);
+	struct lpass_variant *v = drvdata->variant;
+	int ret, dma_ch, dir = substream->stream;
+	struct lpass_pcm_data *data;
+
+	data = kzalloc(sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->i2s_port = cpu_dai->driver->id;
+	runtime->private_data = data;
+
+	if (v->alloc_dma_channel)
+		dma_ch = v->alloc_dma_channel(drvdata, dir);
+	else
+		dma_ch = 0;
+
+	if (dma_ch < 0) {
+		kfree(data);
+		return dma_ch;
+	}
+
+	drvdata->substream[dma_ch] = substream;
+
+	ret = regmap_write(drvdata->lpaif_map,
+			LPAIF_DMACTL_REG(v, dma_ch, dir), 0);
+	if (ret) {
+		dev_err(soc_runtime->dev,
+			"error writing to rdmactl reg: %d\n", ret);
+			return ret;
+	}
+
+	data->dma_ch = dma_ch;
+
+	snd_soc_set_runtime_hwparams(substream, &lpass_platform_pcm_hardware);
+
+	runtime->dma_bytes = lpass_platform_pcm_hardware.buffer_bytes_max;
+
+	ret = snd_pcm_hw_constraint_integer(runtime,
+			SNDRV_PCM_HW_PARAM_PERIODS);
+	if (ret < 0) {
+		kfree(data);
+		dev_err(soc_runtime->dev, "setting constraints failed: %d\n",
+			ret);
+		return -EINVAL;
+	}
+
+	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+
+	return 0;
+}
+
+static int lpass_platform_pcmops_close(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+	struct snd_soc_component *component = snd_soc_rtdcom_lookup(soc_runtime, DRV_NAME);
+	struct lpass_data *drvdata = snd_soc_component_get_drvdata(component);
+	struct lpass_variant *v = drvdata->variant;
+	struct lpass_pcm_data *data;
+
+	data = runtime->private_data;
+	drvdata->substream[data->dma_ch] = NULL;
+	if (v->free_dma_channel)
+		v->free_dma_channel(drvdata, data->dma_ch);
+
+	kfree(data);
+	return 0;
+}
+
+static int lpass_platform_pcmops_hw_params(struct snd_pcm_substream *substream,
+		struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+	struct snd_soc_component *component = snd_soc_rtdcom_lookup(soc_runtime, DRV_NAME);
+	struct lpass_data *drvdata = snd_soc_component_get_drvdata(component);
+	struct snd_pcm_runtime *rt = substream->runtime;
+	struct lpass_pcm_data *pcm_data = rt->private_data;
+	struct lpass_variant *v = drvdata->variant;
+	snd_pcm_format_t format = params_format(params);
+	unsigned int channels = params_channels(params);
+	unsigned int regval;
+	int ch, dir = substream->stream;
+	int bitwidth;
+	int ret, dma_port = pcm_data->i2s_port + v->dmactl_audif_start;
+
+	ch = pcm_data->dma_ch;
+
+	bitwidth = snd_pcm_format_width(format);
+	if (bitwidth < 0) {
+		dev_err(soc_runtime->dev, "invalid bit width given: %d\n",
+				bitwidth);
+		return bitwidth;
+	}
+
+	regval = LPAIF_DMACTL_BURSTEN_INCR4 |
+			LPAIF_DMACTL_AUDINTF(dma_port) |
+			LPAIF_DMACTL_FIFOWM_8;
+
+	switch (bitwidth) {
+	case 16:
+		switch (channels) {
+		case 1:
+		case 2:
+			regval |= LPAIF_DMACTL_WPSCNT_ONE;
+			break;
+		case 4:
+			regval |= LPAIF_DMACTL_WPSCNT_TWO;
+			break;
+		case 6:
+			regval |= LPAIF_DMACTL_WPSCNT_THREE;
+			break;
+		case 8:
+			regval |= LPAIF_DMACTL_WPSCNT_FOUR;
+			break;
+		default:
+			dev_err(soc_runtime->dev,
+				"invalid PCM config given: bw=%d, ch=%u\n",
+				bitwidth, channels);
+			return -EINVAL;
+		}
+		break;
+	case 24:
+	case 32:
+		switch (channels) {
+		case 1:
+			regval |= LPAIF_DMACTL_WPSCNT_ONE;
+			break;
+		case 2:
+			regval |= LPAIF_DMACTL_WPSCNT_TWO;
+			break;
+		case 4:
+			regval |= LPAIF_DMACTL_WPSCNT_FOUR;
+			break;
+		case 6:
+			regval |= LPAIF_DMACTL_WPSCNT_SIX;
+			break;
+		case 8:
+			regval |= LPAIF_DMACTL_WPSCNT_EIGHT;
+			break;
+		default:
+			dev_err(soc_runtime->dev,
+				"invalid PCM config given: bw=%d, ch=%u\n",
+				bitwidth, channels);
+			return -EINVAL;
+		}
+		break;
+	default:
+		dev_err(soc_runtime->dev, "invalid PCM config given: bw=%d, ch=%u\n",
+			bitwidth, channels);
+		return -EINVAL;
+	}
+
+	ret = regmap_write(drvdata->lpaif_map,
+			LPAIF_DMACTL_REG(v, ch, dir), regval);
+	if (ret) {
+		dev_err(soc_runtime->dev, "error writing to rdmactl reg: %d\n",
+			ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int lpass_platform_pcmops_hw_free(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+	struct snd_soc_component *component = snd_soc_rtdcom_lookup(soc_runtime, DRV_NAME);
+	struct lpass_data *drvdata = snd_soc_component_get_drvdata(component);
+	struct snd_pcm_runtime *rt = substream->runtime;
+	struct lpass_pcm_data *pcm_data = rt->private_data;
+	struct lpass_variant *v = drvdata->variant;
+	unsigned int reg;
+	int ret;
+
+	reg = LPAIF_DMACTL_REG(v, pcm_data->dma_ch, substream->stream);
+	ret = regmap_write(drvdata->lpaif_map, reg, 0);
+	if (ret)
+		dev_err(soc_runtime->dev, "error writing to rdmactl reg: %d\n",
+			ret);
+
+	return ret;
+}
+
+static int lpass_platform_pcmops_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+	struct snd_soc_component *component = snd_soc_rtdcom_lookup(soc_runtime, DRV_NAME);
+	struct lpass_data *drvdata = snd_soc_component_get_drvdata(component);
+	struct snd_pcm_runtime *rt = substream->runtime;
+	struct lpass_pcm_data *pcm_data = rt->private_data;
+	struct lpass_variant *v = drvdata->variant;
+	int ret, ch, dir = substream->stream;
+
+	ch = pcm_data->dma_ch;
+
+	ret = regmap_write(drvdata->lpaif_map,
+			LPAIF_DMABASE_REG(v, ch, dir),
+			runtime->dma_addr);
+	if (ret) {
+		dev_err(soc_runtime->dev, "error writing to rdmabase reg: %d\n",
+			ret);
+		return ret;
+	}
+
+	ret = regmap_write(drvdata->lpaif_map,
+			LPAIF_DMABUFF_REG(v, ch, dir),
+			(snd_pcm_lib_buffer_bytes(substream) >> 2) - 1);
+	if (ret) {
+		dev_err(soc_runtime->dev, "error writing to rdmabuff reg: %d\n",
+			ret);
+		return ret;
+	}
+
+	ret = regmap_write(drvdata->lpaif_map,
+			LPAIF_DMAPER_REG(v, ch, dir),
+			(snd_pcm_lib_period_bytes(substream) >> 2) - 1);
+	if (ret) {
+		dev_err(soc_runtime->dev, "error writing to rdmaper reg: %d\n",
+			ret);
+		return ret;
+	}
+
+	ret = regmap_update_bits(drvdata->lpaif_map,
+			LPAIF_DMACTL_REG(v, ch, dir),
+			LPAIF_DMACTL_ENABLE_MASK, LPAIF_DMACTL_ENABLE_ON);
+	if (ret) {
+		dev_err(soc_runtime->dev, "error writing to rdmactl reg: %d\n",
+			ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int lpass_platform_pcmops_trigger(struct snd_pcm_substream *substream,
+		int cmd)
+{
+	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+	struct snd_soc_component *component = snd_soc_rtdcom_lookup(soc_runtime, DRV_NAME);
+	struct lpass_data *drvdata = snd_soc_component_get_drvdata(component);
+	struct snd_pcm_runtime *rt = substream->runtime;
+	struct lpass_pcm_data *pcm_data = rt->private_data;
+	struct lpass_variant *v = drvdata->variant;
+	int ret, ch, dir = substream->stream;
+
+	ch = pcm_data->dma_ch;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		/* clear status before enabling interrupts */
+		ret = regmap_write(drvdata->lpaif_map,
+				LPAIF_IRQCLEAR_REG(v, LPAIF_IRQ_PORT_HOST),
+				LPAIF_IRQ_ALL(ch));
+		if (ret) {
+			dev_err(soc_runtime->dev,
+				"error writing to irqclear reg: %d\n", ret);
+			return ret;
+		}
+
+		ret = regmap_update_bits(drvdata->lpaif_map,
+				LPAIF_IRQEN_REG(v, LPAIF_IRQ_PORT_HOST),
+				LPAIF_IRQ_ALL(ch),
+				LPAIF_IRQ_ALL(ch));
+		if (ret) {
+			dev_err(soc_runtime->dev,
+				"error writing to irqen reg: %d\n", ret);
+			return ret;
+		}
+
+		ret = regmap_update_bits(drvdata->lpaif_map,
+				LPAIF_DMACTL_REG(v, ch, dir),
+				LPAIF_DMACTL_ENABLE_MASK,
+				LPAIF_DMACTL_ENABLE_ON);
+		if (ret) {
+			dev_err(soc_runtime->dev,
+				"error writing to rdmactl reg: %d\n", ret);
+			return ret;
+		}
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		ret = regmap_update_bits(drvdata->lpaif_map,
+				LPAIF_DMACTL_REG(v, ch, dir),
+				LPAIF_DMACTL_ENABLE_MASK,
+				LPAIF_DMACTL_ENABLE_OFF);
+		if (ret) {
+			dev_err(soc_runtime->dev,
+				"error writing to rdmactl reg: %d\n", ret);
+			return ret;
+		}
+
+		ret = regmap_update_bits(drvdata->lpaif_map,
+				LPAIF_IRQEN_REG(v, LPAIF_IRQ_PORT_HOST),
+				LPAIF_IRQ_ALL(ch), 0);
+		if (ret) {
+			dev_err(soc_runtime->dev,
+				"error writing to irqen reg: %d\n", ret);
+			return ret;
+		}
+		break;
+	}
+
+	return 0;
+}
+
+static snd_pcm_uframes_t lpass_platform_pcmops_pointer(
+		struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+	struct snd_soc_component *component = snd_soc_rtdcom_lookup(soc_runtime, DRV_NAME);
+	struct lpass_data *drvdata = snd_soc_component_get_drvdata(component);
+	struct snd_pcm_runtime *rt = substream->runtime;
+	struct lpass_pcm_data *pcm_data = rt->private_data;
+	struct lpass_variant *v = drvdata->variant;
+	unsigned int base_addr, curr_addr;
+	int ret, ch, dir = substream->stream;
+
+	ch = pcm_data->dma_ch;
+
+	ret = regmap_read(drvdata->lpaif_map,
+			LPAIF_DMABASE_REG(v, ch, dir), &base_addr);
+	if (ret) {
+		dev_err(soc_runtime->dev,
+			"error reading from rdmabase reg: %d\n", ret);
+		return ret;
+	}
+
+	ret = regmap_read(drvdata->lpaif_map,
+			LPAIF_DMACURR_REG(v, ch, dir), &curr_addr);
+	if (ret) {
+		dev_err(soc_runtime->dev,
+			"error reading from rdmacurr reg: %d\n", ret);
+		return ret;
+	}
+
+	return bytes_to_frames(substream->runtime, curr_addr - base_addr);
+}
+
+static int lpass_platform_pcmops_mmap(struct snd_pcm_substream *substream,
+		struct vm_area_struct *vma)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	return dma_mmap_coherent(substream->pcm->card->dev, vma,
+			runtime->dma_area, runtime->dma_addr,
+			runtime->dma_bytes);
+}
+
+static const struct snd_pcm_ops lpass_platform_pcm_ops = {
+	.open		= lpass_platform_pcmops_open,
+	.close		= lpass_platform_pcmops_close,
+	.ioctl		= snd_pcm_lib_ioctl,
+	.hw_params	= lpass_platform_pcmops_hw_params,
+	.hw_free	= lpass_platform_pcmops_hw_free,
+	.prepare	= lpass_platform_pcmops_prepare,
+	.trigger	= lpass_platform_pcmops_trigger,
+	.pointer	= lpass_platform_pcmops_pointer,
+	.mmap		= lpass_platform_pcmops_mmap,
+};
+
+static irqreturn_t lpass_dma_interrupt_handler(
+			struct snd_pcm_substream *substream,
+			struct lpass_data *drvdata,
+			int chan, u32 interrupts)
+{
+	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+	struct lpass_variant *v = drvdata->variant;
+	irqreturn_t ret = IRQ_NONE;
+	int rv;
+
+	if (interrupts & LPAIF_IRQ_PER(chan)) {
+		rv = regmap_write(drvdata->lpaif_map,
+				LPAIF_IRQCLEAR_REG(v, LPAIF_IRQ_PORT_HOST),
+				LPAIF_IRQ_PER(chan));
+		if (rv) {
+			dev_err(soc_runtime->dev,
+				"error writing to irqclear reg: %d\n", rv);
+			return IRQ_NONE;
+		}
+		snd_pcm_period_elapsed(substream);
+		ret = IRQ_HANDLED;
+	}
+
+	if (interrupts & LPAIF_IRQ_XRUN(chan)) {
+		rv = regmap_write(drvdata->lpaif_map,
+				LPAIF_IRQCLEAR_REG(v, LPAIF_IRQ_PORT_HOST),
+				LPAIF_IRQ_XRUN(chan));
+		if (rv) {
+			dev_err(soc_runtime->dev,
+				"error writing to irqclear reg: %d\n", rv);
+			return IRQ_NONE;
+		}
+		dev_warn(soc_runtime->dev, "xrun warning\n");
+		snd_pcm_stop_xrun(substream);
+		ret = IRQ_HANDLED;
+	}
+
+	if (interrupts & LPAIF_IRQ_ERR(chan)) {
+		rv = regmap_write(drvdata->lpaif_map,
+				LPAIF_IRQCLEAR_REG(v, LPAIF_IRQ_PORT_HOST),
+				LPAIF_IRQ_ERR(chan));
+		if (rv) {
+			dev_err(soc_runtime->dev,
+				"error writing to irqclear reg: %d\n", rv);
+			return IRQ_NONE;
+		}
+		dev_err(soc_runtime->dev, "bus access error\n");
+		snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED);
+		ret = IRQ_HANDLED;
+	}
+
+	return ret;
+}
+
+static irqreturn_t lpass_platform_lpaif_irq(int irq, void *data)
+{
+	struct lpass_data *drvdata = data;
+	struct lpass_variant *v = drvdata->variant;
+	unsigned int irqs;
+	int rv, chan;
+
+	rv = regmap_read(drvdata->lpaif_map,
+			LPAIF_IRQSTAT_REG(v, LPAIF_IRQ_PORT_HOST), &irqs);
+	if (rv) {
+		pr_err("error reading from irqstat reg: %d\n", rv);
+		return IRQ_NONE;
+	}
+
+	/* Handle per channel interrupts */
+	for (chan = 0; chan < LPASS_MAX_DMA_CHANNELS; chan++) {
+		if (irqs & LPAIF_IRQ_ALL(chan) && drvdata->substream[chan]) {
+			rv = lpass_dma_interrupt_handler(
+						drvdata->substream[chan],
+						drvdata, chan, irqs);
+			if (rv != IRQ_HANDLED)
+				return rv;
+		}
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int lpass_platform_pcm_new(struct snd_soc_pcm_runtime *soc_runtime)
+{
+	struct snd_pcm *pcm = soc_runtime->pcm;
+	struct snd_pcm_substream *psubstream, *csubstream;
+	struct snd_soc_component *component = snd_soc_rtdcom_lookup(soc_runtime, DRV_NAME);
+	int ret = -EINVAL;
+	size_t size = lpass_platform_pcm_hardware.buffer_bytes_max;
+
+	psubstream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+	if (psubstream) {
+		ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
+					component->dev,
+					size, &psubstream->dma_buffer);
+		if (ret) {
+			dev_err(soc_runtime->dev, "Cannot allocate buffer(s)\n");
+			return ret;
+		}
+	}
+
+	csubstream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
+	if (csubstream) {
+		ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
+					component->dev,
+					size, &csubstream->dma_buffer);
+		if (ret) {
+			dev_err(soc_runtime->dev, "Cannot allocate buffer(s)\n");
+			if (psubstream)
+				snd_dma_free_pages(&psubstream->dma_buffer);
+			return ret;
+		}
+
+	}
+
+	return 0;
+}
+
+static void lpass_platform_pcm_free(struct snd_pcm *pcm)
+{
+	struct snd_pcm_substream *substream;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(pcm->streams); i++) {
+		substream = pcm->streams[i].substream;
+		if (substream) {
+			snd_dma_free_pages(&substream->dma_buffer);
+			substream->dma_buffer.area = NULL;
+			substream->dma_buffer.addr = 0;
+		}
+	}
+}
+
+static const struct snd_soc_component_driver lpass_component_driver = {
+	.name		= DRV_NAME,
+	.pcm_new	= lpass_platform_pcm_new,
+	.pcm_free	= lpass_platform_pcm_free,
+	.ops		= &lpass_platform_pcm_ops,
+};
+
+int asoc_qcom_lpass_platform_register(struct platform_device *pdev)
+{
+	struct lpass_data *drvdata = platform_get_drvdata(pdev);
+	struct lpass_variant *v = drvdata->variant;
+	int ret;
+
+	drvdata->lpaif_irq = platform_get_irq_byname(pdev, "lpass-irq-lpaif");
+	if (drvdata->lpaif_irq < 0) {
+		dev_err(&pdev->dev, "error getting irq handle: %d\n",
+			drvdata->lpaif_irq);
+		return -ENODEV;
+	}
+
+	/* ensure audio hardware is disabled */
+	ret = regmap_write(drvdata->lpaif_map,
+			LPAIF_IRQEN_REG(v, LPAIF_IRQ_PORT_HOST), 0);
+	if (ret) {
+		dev_err(&pdev->dev, "error writing to irqen reg: %d\n", ret);
+		return ret;
+	}
+
+	ret = devm_request_irq(&pdev->dev, drvdata->lpaif_irq,
+			lpass_platform_lpaif_irq, IRQF_TRIGGER_RISING,
+			"lpass-irq-lpaif", drvdata);
+	if (ret) {
+		dev_err(&pdev->dev, "irq request failed: %d\n", ret);
+		return ret;
+	}
+
+
+	return devm_snd_soc_register_component(&pdev->dev,
+			&lpass_component_driver, NULL, 0);
+}
+EXPORT_SYMBOL_GPL(asoc_qcom_lpass_platform_register);
+
+MODULE_DESCRIPTION("QTi LPASS Platform Driver");
+MODULE_LICENSE("GPL v2");