1 files changed, 546 insertions, 0 deletions

diff --git a/sound/soc/qcom/lpass-cpu.c b/sound/soc/qcom/lpass-cpu.c
new file mode 100644
index 000000000..475579a98
--- /dev/null
+++ b/sound/soc/qcom/lpass-cpu.c
@@ -0,0 +1,546 @@
+/*
+ * 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-cpu.c -- ALSA SoC CPU DAI driver for QTi LPASS
+ */
+
+#include <linux/clk.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <linux/regmap.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+#include "lpass-lpaif-reg.h"
+#include "lpass.h"
+
+static int lpass_cpu_daiops_set_sysclk(struct snd_soc_dai *dai, int clk_id,
+		unsigned int freq, int dir)
+{
+	struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
+	int ret;
+
+	ret = clk_set_rate(drvdata->mi2s_osr_clk[dai->driver->id], freq);
+	if (ret)
+		dev_err(dai->dev, "error setting mi2s osrclk to %u: %d\n",
+			freq, ret);
+
+	return ret;
+}
+
+static int lpass_cpu_daiops_startup(struct snd_pcm_substream *substream,
+		struct snd_soc_dai *dai)
+{
+	struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
+	int ret;
+
+	ret = clk_prepare_enable(drvdata->mi2s_osr_clk[dai->driver->id]);
+	if (ret) {
+		dev_err(dai->dev, "error in enabling mi2s osr clk: %d\n", ret);
+		return ret;
+	}
+
+	ret = clk_prepare_enable(drvdata->mi2s_bit_clk[dai->driver->id]);
+	if (ret) {
+		dev_err(dai->dev, "error in enabling mi2s bit clk: %d\n", ret);
+		clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->driver->id]);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void lpass_cpu_daiops_shutdown(struct snd_pcm_substream *substream,
+		struct snd_soc_dai *dai)
+{
+	struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
+
+	clk_disable_unprepare(drvdata->mi2s_bit_clk[dai->driver->id]);
+
+	clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->driver->id]);
+}
+
+static int lpass_cpu_daiops_hw_params(struct snd_pcm_substream *substream,
+		struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+	struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
+	snd_pcm_format_t format = params_format(params);
+	unsigned int channels = params_channels(params);
+	unsigned int rate = params_rate(params);
+	unsigned int regval;
+	int bitwidth, ret;
+
+	bitwidth = snd_pcm_format_width(format);
+	if (bitwidth < 0) {
+		dev_err(dai->dev, "invalid bit width given: %d\n", bitwidth);
+		return bitwidth;
+	}
+
+	regval = LPAIF_I2SCTL_LOOPBACK_DISABLE |
+			LPAIF_I2SCTL_WSSRC_INTERNAL;
+
+	switch (bitwidth) {
+	case 16:
+		regval |= LPAIF_I2SCTL_BITWIDTH_16;
+		break;
+	case 24:
+		regval |= LPAIF_I2SCTL_BITWIDTH_24;
+		break;
+	case 32:
+		regval |= LPAIF_I2SCTL_BITWIDTH_32;
+		break;
+	default:
+		dev_err(dai->dev, "invalid bitwidth given: %d\n", bitwidth);
+		return -EINVAL;
+	}
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		switch (channels) {
+		case 1:
+			regval |= LPAIF_I2SCTL_SPKMODE_SD0;
+			regval |= LPAIF_I2SCTL_SPKMONO_MONO;
+			break;
+		case 2:
+			regval |= LPAIF_I2SCTL_SPKMODE_SD0;
+			regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
+			break;
+		case 4:
+			regval |= LPAIF_I2SCTL_SPKMODE_QUAD01;
+			regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
+			break;
+		case 6:
+			regval |= LPAIF_I2SCTL_SPKMODE_6CH;
+			regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
+			break;
+		case 8:
+			regval |= LPAIF_I2SCTL_SPKMODE_8CH;
+			regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
+			break;
+		default:
+			dev_err(dai->dev, "invalid channels given: %u\n",
+				channels);
+			return -EINVAL;
+		}
+	} else {
+		switch (channels) {
+		case 1:
+			regval |= LPAIF_I2SCTL_MICMODE_SD0;
+			regval |= LPAIF_I2SCTL_MICMONO_MONO;
+			break;
+		case 2:
+			regval |= LPAIF_I2SCTL_MICMODE_SD0;
+			regval |= LPAIF_I2SCTL_MICMONO_STEREO;
+			break;
+		case 4:
+			regval |= LPAIF_I2SCTL_MICMODE_QUAD01;
+			regval |= LPAIF_I2SCTL_MICMONO_STEREO;
+			break;
+		case 6:
+			regval |= LPAIF_I2SCTL_MICMODE_6CH;
+			regval |= LPAIF_I2SCTL_MICMONO_STEREO;
+			break;
+		case 8:
+			regval |= LPAIF_I2SCTL_MICMODE_8CH;
+			regval |= LPAIF_I2SCTL_MICMONO_STEREO;
+			break;
+		default:
+			dev_err(dai->dev, "invalid channels given: %u\n",
+				channels);
+			return -EINVAL;
+		}
+	}
+
+	ret = regmap_write(drvdata->lpaif_map,
+			   LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
+			   regval);
+	if (ret) {
+		dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
+		return ret;
+	}
+
+	ret = clk_set_rate(drvdata->mi2s_bit_clk[dai->driver->id],
+			   rate * bitwidth * 2);
+	if (ret) {
+		dev_err(dai->dev, "error setting mi2s bitclk to %u: %d\n",
+			rate * bitwidth * 2, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int lpass_cpu_daiops_prepare(struct snd_pcm_substream *substream,
+		struct snd_soc_dai *dai)
+{
+	struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
+	int ret;
+	unsigned int val, mask;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		val = LPAIF_I2SCTL_SPKEN_ENABLE;
+		mask = LPAIF_I2SCTL_SPKEN_MASK;
+	} else  {
+		val = LPAIF_I2SCTL_MICEN_ENABLE;
+		mask = LPAIF_I2SCTL_MICEN_MASK;
+	}
+
+	ret = regmap_update_bits(drvdata->lpaif_map,
+			LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
+			mask, val);
+	if (ret)
+		dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
+
+	return ret;
+}
+
+static int lpass_cpu_daiops_trigger(struct snd_pcm_substream *substream,
+		int cmd, struct snd_soc_dai *dai)
+{
+	struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
+	int ret = -EINVAL;
+	unsigned int val, mask;
+
+	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) {
+			val = LPAIF_I2SCTL_SPKEN_ENABLE;
+			mask = LPAIF_I2SCTL_SPKEN_MASK;
+		} else  {
+			val = LPAIF_I2SCTL_MICEN_ENABLE;
+			mask = LPAIF_I2SCTL_MICEN_MASK;
+		}
+
+		ret = regmap_update_bits(drvdata->lpaif_map,
+				LPAIF_I2SCTL_REG(drvdata->variant,
+						dai->driver->id),
+				mask, val);
+		if (ret)
+			dev_err(dai->dev, "error writing to i2sctl reg: %d\n",
+				ret);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			val = LPAIF_I2SCTL_SPKEN_DISABLE;
+			mask = LPAIF_I2SCTL_SPKEN_MASK;
+		} else  {
+			val = LPAIF_I2SCTL_MICEN_DISABLE;
+			mask = LPAIF_I2SCTL_MICEN_MASK;
+		}
+
+		ret = regmap_update_bits(drvdata->lpaif_map,
+				LPAIF_I2SCTL_REG(drvdata->variant,
+						dai->driver->id),
+				mask, val);
+		if (ret)
+			dev_err(dai->dev, "error writing to i2sctl reg: %d\n",
+				ret);
+		break;
+	}
+
+	return ret;
+}
+
+const struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops = {
+	.set_sysclk	= lpass_cpu_daiops_set_sysclk,
+	.startup	= lpass_cpu_daiops_startup,
+	.shutdown	= lpass_cpu_daiops_shutdown,
+	.hw_params	= lpass_cpu_daiops_hw_params,
+	.prepare	= lpass_cpu_daiops_prepare,
+	.trigger	= lpass_cpu_daiops_trigger,
+};
+EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_dai_ops);
+
+int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai)
+{
+	struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
+	int ret;
+
+	/* ensure audio hardware is disabled */
+	ret = regmap_write(drvdata->lpaif_map,
+			LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id), 0);
+	if (ret)
+		dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_dai_probe);
+
+static const struct snd_soc_component_driver lpass_cpu_comp_driver = {
+	.name = "lpass-cpu",
+};
+
+static bool lpass_cpu_regmap_writeable(struct device *dev, unsigned int reg)
+{
+	struct lpass_data *drvdata = dev_get_drvdata(dev);
+	struct lpass_variant *v = drvdata->variant;
+	int i;
+
+	for (i = 0; i < v->i2s_ports; ++i)
+		if (reg == LPAIF_I2SCTL_REG(v, i))
+			return true;
+
+	for (i = 0; i < v->irq_ports; ++i) {
+		if (reg == LPAIF_IRQEN_REG(v, i))
+			return true;
+		if (reg == LPAIF_IRQCLEAR_REG(v, i))
+			return true;
+	}
+
+	for (i = 0; i < v->rdma_channels; ++i) {
+		if (reg == LPAIF_RDMACTL_REG(v, i))
+			return true;
+		if (reg == LPAIF_RDMABASE_REG(v, i))
+			return true;
+		if (reg == LPAIF_RDMABUFF_REG(v, i))
+			return true;
+		if (reg == LPAIF_RDMAPER_REG(v, i))
+			return true;
+	}
+
+	for (i = 0; i < v->wrdma_channels; ++i) {
+		if (reg == LPAIF_WRDMACTL_REG(v, i + v->wrdma_channel_start))
+			return true;
+		if (reg == LPAIF_WRDMABASE_REG(v, i + v->wrdma_channel_start))
+			return true;
+		if (reg == LPAIF_WRDMABUFF_REG(v, i + v->wrdma_channel_start))
+			return true;
+		if (reg == LPAIF_WRDMAPER_REG(v, i + v->wrdma_channel_start))
+			return true;
+	}
+
+	return false;
+}
+
+static bool lpass_cpu_regmap_readable(struct device *dev, unsigned int reg)
+{
+	struct lpass_data *drvdata = dev_get_drvdata(dev);
+	struct lpass_variant *v = drvdata->variant;
+	int i;
+
+	for (i = 0; i < v->i2s_ports; ++i)
+		if (reg == LPAIF_I2SCTL_REG(v, i))
+			return true;
+
+	for (i = 0; i < v->irq_ports; ++i) {
+		if (reg == LPAIF_IRQEN_REG(v, i))
+			return true;
+		if (reg == LPAIF_IRQSTAT_REG(v, i))
+			return true;
+	}
+
+	for (i = 0; i < v->rdma_channels; ++i) {
+		if (reg == LPAIF_RDMACTL_REG(v, i))
+			return true;
+		if (reg == LPAIF_RDMABASE_REG(v, i))
+			return true;
+		if (reg == LPAIF_RDMABUFF_REG(v, i))
+			return true;
+		if (reg == LPAIF_RDMACURR_REG(v, i))
+			return true;
+		if (reg == LPAIF_RDMAPER_REG(v, i))
+			return true;
+	}
+
+	for (i = 0; i < v->wrdma_channels; ++i) {
+		if (reg == LPAIF_WRDMACTL_REG(v, i + v->wrdma_channel_start))
+			return true;
+		if (reg == LPAIF_WRDMABASE_REG(v, i + v->wrdma_channel_start))
+			return true;
+		if (reg == LPAIF_WRDMABUFF_REG(v, i + v->wrdma_channel_start))
+			return true;
+		if (reg == LPAIF_WRDMACURR_REG(v, i + v->wrdma_channel_start))
+			return true;
+		if (reg == LPAIF_WRDMAPER_REG(v, i + v->wrdma_channel_start))
+			return true;
+	}
+
+	return false;
+}
+
+static bool lpass_cpu_regmap_volatile(struct device *dev, unsigned int reg)
+{
+	struct lpass_data *drvdata = dev_get_drvdata(dev);
+	struct lpass_variant *v = drvdata->variant;
+	int i;
+
+	for (i = 0; i < v->irq_ports; ++i)
+		if (reg == LPAIF_IRQSTAT_REG(v, i))
+			return true;
+
+	for (i = 0; i < v->rdma_channels; ++i)
+		if (reg == LPAIF_RDMACURR_REG(v, i))
+			return true;
+
+	for (i = 0; i < v->wrdma_channels; ++i)
+		if (reg == LPAIF_WRDMACURR_REG(v, i + v->wrdma_channel_start))
+			return true;
+
+	return false;
+}
+
+static struct regmap_config lpass_cpu_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.writeable_reg = lpass_cpu_regmap_writeable,
+	.readable_reg = lpass_cpu_regmap_readable,
+	.volatile_reg = lpass_cpu_regmap_volatile,
+	.cache_type = REGCACHE_FLAT,
+};
+
+int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev)
+{
+	struct lpass_data *drvdata;
+	struct device_node *dsp_of_node;
+	struct resource *res;
+	struct lpass_variant *variant;
+	struct device *dev = &pdev->dev;
+	const struct of_device_id *match;
+	int ret, i, dai_id;
+
+	dsp_of_node = of_parse_phandle(pdev->dev.of_node, "qcom,adsp", 0);
+	if (dsp_of_node) {
+		dev_err(&pdev->dev, "DSP exists and holds audio resources\n");
+		return -EBUSY;
+	}
+
+	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct lpass_data),
+			GFP_KERNEL);
+	if (!drvdata)
+		return -ENOMEM;
+	platform_set_drvdata(pdev, drvdata);
+
+	match = of_match_device(dev->driver->of_match_table, dev);
+	if (!match || !match->data)
+		return -EINVAL;
+
+	drvdata->variant = (struct lpass_variant *)match->data;
+	variant = drvdata->variant;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "lpass-lpaif");
+
+	drvdata->lpaif = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR((void const __force *)drvdata->lpaif)) {
+		dev_err(&pdev->dev, "error mapping reg resource: %ld\n",
+				PTR_ERR((void const __force *)drvdata->lpaif));
+		return PTR_ERR((void const __force *)drvdata->lpaif);
+	}
+
+	lpass_cpu_regmap_config.max_register = LPAIF_WRDMAPER_REG(variant,
+						variant->wrdma_channels +
+						variant->wrdma_channel_start);
+
+	drvdata->lpaif_map = devm_regmap_init_mmio(&pdev->dev, drvdata->lpaif,
+			&lpass_cpu_regmap_config);
+	if (IS_ERR(drvdata->lpaif_map)) {
+		dev_err(&pdev->dev, "error initializing regmap: %ld\n",
+			PTR_ERR(drvdata->lpaif_map));
+		return PTR_ERR(drvdata->lpaif_map);
+	}
+
+	if (variant->init)
+		variant->init(pdev);
+
+	for (i = 0; i < variant->num_dai; i++) {
+		dai_id = variant->dai_driver[i].id;
+		drvdata->mi2s_osr_clk[dai_id] = devm_clk_get(&pdev->dev,
+					     variant->dai_osr_clk_names[i]);
+		if (IS_ERR(drvdata->mi2s_osr_clk[dai_id])) {
+			dev_warn(&pdev->dev,
+				"%s() error getting optional %s: %ld\n",
+				__func__,
+				variant->dai_osr_clk_names[i],
+				PTR_ERR(drvdata->mi2s_osr_clk[dai_id]));
+
+			drvdata->mi2s_osr_clk[dai_id] = NULL;
+		}
+
+		drvdata->mi2s_bit_clk[dai_id] = devm_clk_get(&pdev->dev,
+						variant->dai_bit_clk_names[i]);
+		if (IS_ERR(drvdata->mi2s_bit_clk[dai_id])) {
+			dev_err(&pdev->dev,
+				"error getting %s: %ld\n",
+				variant->dai_bit_clk_names[i],
+				PTR_ERR(drvdata->mi2s_bit_clk[dai_id]));
+			return PTR_ERR(drvdata->mi2s_bit_clk[dai_id]);
+		}
+	}
+
+	drvdata->ahbix_clk = devm_clk_get(&pdev->dev, "ahbix-clk");
+	if (IS_ERR(drvdata->ahbix_clk)) {
+		dev_err(&pdev->dev, "error getting ahbix-clk: %ld\n",
+			PTR_ERR(drvdata->ahbix_clk));
+		return PTR_ERR(drvdata->ahbix_clk);
+	}
+
+	ret = clk_set_rate(drvdata->ahbix_clk, LPASS_AHBIX_CLOCK_FREQUENCY);
+	if (ret) {
+		dev_err(&pdev->dev, "error setting rate on ahbix_clk: %d\n",
+			ret);
+		return ret;
+	}
+	dev_dbg(&pdev->dev, "set ahbix_clk rate to %lu\n",
+		clk_get_rate(drvdata->ahbix_clk));
+
+	ret = clk_prepare_enable(drvdata->ahbix_clk);
+	if (ret) {
+		dev_err(&pdev->dev, "error enabling ahbix_clk: %d\n", ret);
+		return ret;
+	}
+
+	ret = devm_snd_soc_register_component(&pdev->dev,
+					      &lpass_cpu_comp_driver,
+					      variant->dai_driver,
+					      variant->num_dai);
+	if (ret) {
+		dev_err(&pdev->dev, "error registering cpu driver: %d\n", ret);
+		goto err_clk;
+	}
+
+	ret = asoc_qcom_lpass_platform_register(pdev);
+	if (ret) {
+		dev_err(&pdev->dev, "error registering platform driver: %d\n",
+			ret);
+		goto err_clk;
+	}
+
+	return 0;
+
+err_clk:
+	clk_disable_unprepare(drvdata->ahbix_clk);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_platform_probe);
+
+int asoc_qcom_lpass_cpu_platform_remove(struct platform_device *pdev)
+{
+	struct lpass_data *drvdata = platform_get_drvdata(pdev);
+
+	if (drvdata->variant->exit)
+		drvdata->variant->exit(pdev);
+
+	clk_disable_unprepare(drvdata->ahbix_clk);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_platform_remove);
+
+MODULE_DESCRIPTION("QTi LPASS CPU Driver");
+MODULE_LICENSE("GPL v2");