Message-Id: <E1elDck-0007An-R1@debutante>
Date:   Mon, 12 Feb 2018 12:54:22 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Katsuhiro Suzuki <suzuki.katsuhiro@...ionext.com>
Cc:     Mark Brown <broonie@...nel.org>, Mark Brown <broonie@...nel.org>,
        alsa-devel@...a-project.org, Rob Herring <robh+dt@...nel.org>,
        devicetree@...r.kernel.org,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        linux-arm-kernel@...ts.infradead.org,
        Masami Hiramatsu <masami.hiramatsu@...aro.org>,
        linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: Applied "ASoC: uniphier: add support for UniPhier AIO CPU DAI driver" to the asoc tree

The patch

   ASoC: uniphier: add support for UniPhier AIO CPU DAI driver

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 139a342002330e2e9730a564766ec04bd028d511 Mon Sep 17 00:00:00 2001
From: Katsuhiro Suzuki <suzuki.katsuhiro@...ionext.com>
Date: Fri, 19 Jan 2018 18:25:31 +0900
Subject: [PATCH] ASoC: uniphier: add support for UniPhier AIO CPU DAI driver

This patch adds CPU DAI driver for UniPhier AIO audio sound system.

This module provides PCM devices for all input/output port of AIO
such as I2S, S/PDIF.

Signed-off-by: Katsuhiro Suzuki <suzuki.katsuhiro@...ionext.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
---
 sound/soc/uniphier/Makefile  |   2 +-
 sound/soc/uniphier/aio-cpu.c | 570 +++++++++++++++++++++++++++++++++++++++++++
 sound/soc/uniphier/aio.h     |   9 +
 3 files changed, 580 insertions(+), 1 deletion(-)
 create mode 100644 sound/soc/uniphier/aio-cpu.c

diff --git a/sound/soc/uniphier/Makefile b/sound/soc/uniphier/Makefile
index 9efe0feffdc2..3ef2784b2383 100644
--- a/sound/soc/uniphier/Makefile
+++ b/sound/soc/uniphier/Makefile
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
-snd-soc-uniphier-aio-cpu-objs := aio-core.o aio-dma.o
+snd-soc-uniphier-aio-cpu-objs := aio-core.o aio-dma.o aio-cpu.o
 
 obj-$(CONFIG_SND_SOC_UNIPHIER_AIO) += snd-soc-uniphier-aio-cpu.o
 
diff --git a/sound/soc/uniphier/aio-cpu.c b/sound/soc/uniphier/aio-cpu.c
new file mode 100644
index 000000000000..55f3248a31fd
--- /dev/null
+++ b/sound/soc/uniphier/aio-cpu.c
@@ -0,0 +1,570 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Socionext UniPhier AIO ALSA CPU DAI driver.
+//
+// Copyright (c) 2016-2018 Socionext Inc.
+//
+// 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, see <http://www.gnu.org/licenses/>.
+
+#include <linux/clk.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "aio.h"
+
+static bool is_valid_pll(struct uniphier_aio_chip *chip, int pll_id)
+{
+	struct device *dev = &chip->pdev->dev;
+
+	if (pll_id < 0 || chip->num_plls <= pll_id) {
+		dev_err(dev, "PLL(%d) is not supported\n", pll_id);
+		return false;
+	}
+
+	return chip->plls[pll_id].enable;
+}
+
+static bool match_spec(const struct uniphier_aio_spec *spec,
+		       const char *name, int dir)
+{
+	if (dir == SNDRV_PCM_STREAM_PLAYBACK &&
+	    spec->swm.dir != PORT_DIR_OUTPUT) {
+		return false;
+	}
+
+	if (dir == SNDRV_PCM_STREAM_CAPTURE &&
+	    spec->swm.dir != PORT_DIR_INPUT) {
+		return false;
+	}
+
+	if (spec->name && strcmp(spec->name, name) == 0)
+		return true;
+
+	if (spec->gname && strcmp(spec->gname, name) == 0)
+		return true;
+
+	return false;
+}
+
+/**
+ * find_spec - find HW specification info by name
+ * @aio: the AIO device pointer
+ * @name: name of device
+ * @direction: the direction of substream, SNDRV_PCM_STREAM_*
+ *
+ * Find hardware specification information from list by device name. This
+ * information is used for telling the difference of SoCs to driver.
+ *
+ * Specification list is array of 'struct uniphier_aio_spec' which is defined
+ * in each drivers (see: aio-i2s.c).
+ *
+ * Return: The pointer of hardware specification of AIO if successful,
+ * otherwise NULL on error.
+ */
+static const struct uniphier_aio_spec *find_spec(struct uniphier_aio *aio,
+						 const char *name,
+						 int direction)
+{
+	const struct uniphier_aio_chip_spec *chip_spec = aio->chip->chip_spec;
+	int i;
+
+	for (i = 0; i < chip_spec->num_specs; i++) {
+		const struct uniphier_aio_spec *spec = &chip_spec->specs[i];
+
+		if (match_spec(spec, name, direction))
+			return spec;
+	}
+
+	return NULL;
+}
+
+/**
+ * find_divider - find clock divider by frequency
+ * @aio: the AIO device pointer
+ * @pll_id: PLL ID, should be AUD_PLL_XX
+ * @freq: required frequency
+ *
+ * Find suitable clock divider by frequency.
+ *
+ * Return: The ID of PLL if successful, otherwise negative error value.
+ */
+static int find_divider(struct uniphier_aio *aio, int pll_id, unsigned int freq)
+{
+	struct uniphier_aio_pll *pll;
+	int mul[] = { 1, 1, 1, 2, };
+	int div[] = { 2, 3, 1, 3, };
+	int i;
+
+	if (!is_valid_pll(aio->chip, pll_id))
+		return -EINVAL;
+
+	pll = &aio->chip->plls[pll_id];
+	for (i = 0; i < ARRAY_SIZE(mul); i++)
+		if (pll->freq * mul[i] / div[i] == freq)
+			return i;
+
+	return -ENOTSUPP;
+}
+
+static int uniphier_aio_set_sysclk(struct snd_soc_dai *dai, int clk_id,
+				   unsigned int freq, int dir)
+{
+	struct uniphier_aio *aio = uniphier_priv(dai);
+	struct device *dev = &aio->chip->pdev->dev;
+	bool pll_auto = false;
+	int pll_id, div_id;
+
+	if (clk_id == AUD_CLK_IO)
+		return -ENOTSUPP;
+
+	switch (clk_id) {
+	case AUD_CLK_IO:
+		return -ENOTSUPP;
+	case AUD_CLK_A1:
+		pll_id = AUD_PLL_A1;
+		break;
+	case AUD_CLK_F1:
+		pll_id = AUD_PLL_F1;
+		break;
+	case AUD_CLK_A2:
+		pll_id = AUD_PLL_A2;
+		break;
+	case AUD_CLK_F2:
+		pll_id = AUD_PLL_F2;
+		break;
+	case AUD_CLK_A:
+		pll_id = AUD_PLL_A1;
+		pll_auto = true;
+		break;
+	case AUD_CLK_F:
+		pll_id = AUD_PLL_F1;
+		pll_auto = true;
+		break;
+	case AUD_CLK_APLL:
+		pll_id = AUD_PLL_APLL;
+		break;
+	case AUD_CLK_RX0:
+		pll_id = AUD_PLL_RX0;
+		break;
+	case AUD_CLK_USB0:
+		pll_id = AUD_PLL_USB0;
+		break;
+	case AUD_CLK_HSC0:
+		pll_id = AUD_PLL_HSC0;
+		break;
+	default:
+		dev_err(dev, "Sysclk(%d) is not supported\n", clk_id);
+		return -EINVAL;
+	}
+
+	if (pll_auto) {
+		for (pll_id = 0; pll_id < aio->chip->num_plls; pll_id++) {
+			div_id = find_divider(aio, pll_id, freq);
+			if (div_id >= 0) {
+				aio->plldiv = div_id;
+				break;
+			}
+		}
+		if (pll_id == aio->chip->num_plls) {
+			dev_err(dev, "Sysclk frequency is not supported(%d)\n",
+				freq);
+			return -EINVAL;
+		}
+	}
+
+	if (dir == SND_SOC_CLOCK_OUT)
+		aio->pll_out = pll_id;
+	else
+		aio->pll_in = pll_id;
+
+	return 0;
+}
+
+static int uniphier_aio_set_pll(struct snd_soc_dai *dai, int pll_id,
+				int source, unsigned int freq_in,
+				unsigned int freq_out)
+{
+	struct uniphier_aio *aio = uniphier_priv(dai);
+	struct device *dev = &aio->chip->pdev->dev;
+	int ret;
+
+	if (!is_valid_pll(aio->chip, pll_id))
+		return -EINVAL;
+	if (!aio->chip->plls[pll_id].enable) {
+		dev_err(dev, "PLL(%d) is not implemented\n", pll_id);
+		return -ENOTSUPP;
+	}
+
+	ret = aio_chip_set_pll(aio->chip, pll_id, freq_out);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int uniphier_aio_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	struct uniphier_aio *aio = uniphier_priv(dai);
+	struct device *dev = &aio->chip->pdev->dev;
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_LEFT_J:
+	case SND_SOC_DAIFMT_RIGHT_J:
+	case SND_SOC_DAIFMT_I2S:
+		aio->fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
+		break;
+	default:
+		dev_err(dev, "Format is not supported(%d)\n",
+			fmt & SND_SOC_DAIFMT_FORMAT_MASK);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int uniphier_aio_startup(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct uniphier_aio *aio = uniphier_priv(dai);
+	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
+	int ret;
+
+	sub->substream = substream;
+	sub->pass_through = 0;
+	sub->use_mmap = true;
+
+	ret = aio_init(sub);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static void uniphier_aio_shutdown(struct snd_pcm_substream *substream,
+				  struct snd_soc_dai *dai)
+{
+	struct uniphier_aio *aio = uniphier_priv(dai);
+	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
+
+	sub->substream = NULL;
+}
+
+static int uniphier_aio_hw_params(struct snd_pcm_substream *substream,
+				  struct snd_pcm_hw_params *params,
+				  struct snd_soc_dai *dai)
+{
+	struct uniphier_aio *aio = uniphier_priv(dai);
+	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
+	struct device *dev = &aio->chip->pdev->dev;
+	int freq, ret;
+
+	switch (params_rate(params)) {
+	case 48000:
+	case 32000:
+	case 24000:
+		freq = 12288000;
+		break;
+	case 44100:
+	case 22050:
+		freq = 11289600;
+		break;
+	default:
+		dev_err(dev, "Rate is not supported(%d)\n",
+			params_rate(params));
+		return -EINVAL;
+	}
+	ret = snd_soc_dai_set_sysclk(dai, AUD_CLK_A,
+				     freq, SND_SOC_CLOCK_OUT);
+	if (ret)
+		return ret;
+
+	sub->params = *params;
+	sub->setting = 1;
+
+	aio_port_reset(sub);
+	aio_src_reset(sub);
+
+	return 0;
+}
+
+static int uniphier_aio_hw_free(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct uniphier_aio *aio = uniphier_priv(dai);
+	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
+
+	sub->setting = 0;
+
+	return 0;
+}
+
+static int uniphier_aio_prepare(struct snd_pcm_substream *substream,
+				struct snd_soc_dai *dai)
+{
+	struct uniphier_aio *aio = uniphier_priv(dai);
+	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
+	int ret;
+
+	ret = aio_port_set_param(sub, sub->pass_through, &sub->params);
+	if (ret)
+		return ret;
+	ret = aio_src_set_param(sub, &sub->params);
+	if (ret)
+		return ret;
+	aio_port_set_enable(sub, 1);
+
+	ret = aio_if_set_param(sub, sub->pass_through);
+	if (ret)
+		return ret;
+
+	if (sub->swm->type == PORT_TYPE_CONV) {
+		ret = aio_srcif_set_param(sub);
+		if (ret)
+			return ret;
+		ret = aio_srcch_set_param(sub);
+		if (ret)
+			return ret;
+		aio_srcch_set_enable(sub, 1);
+	}
+
+	return 0;
+}
+
+const struct snd_soc_dai_ops uniphier_aio_i2s_ops = {
+	.set_sysclk  = uniphier_aio_set_sysclk,
+	.set_pll     = uniphier_aio_set_pll,
+	.set_fmt     = uniphier_aio_set_fmt,
+	.startup     = uniphier_aio_startup,
+	.shutdown    = uniphier_aio_shutdown,
+	.hw_params   = uniphier_aio_hw_params,
+	.hw_free     = uniphier_aio_hw_free,
+	.prepare     = uniphier_aio_prepare,
+};
+EXPORT_SYMBOL_GPL(uniphier_aio_i2s_ops);
+
+const struct snd_soc_dai_ops uniphier_aio_spdif_ops = {
+	.set_sysclk  = uniphier_aio_set_sysclk,
+	.set_pll     = uniphier_aio_set_pll,
+	.startup     = uniphier_aio_startup,
+	.shutdown    = uniphier_aio_shutdown,
+	.hw_params   = uniphier_aio_hw_params,
+	.hw_free     = uniphier_aio_hw_free,
+	.prepare     = uniphier_aio_prepare,
+};
+EXPORT_SYMBOL_GPL(uniphier_aio_spdif_ops);
+
+int uniphier_aio_dai_probe(struct snd_soc_dai *dai)
+{
+	struct uniphier_aio *aio = uniphier_priv(dai);
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(aio->sub); i++) {
+		struct uniphier_aio_sub *sub = &aio->sub[i];
+		const struct uniphier_aio_spec *spec;
+
+		spec = find_spec(aio, dai->name, i);
+		if (!spec)
+			continue;
+
+		sub->swm = &spec->swm;
+		sub->spec = spec;
+	}
+
+	aio_chip_init(aio->chip);
+	aio->chip->active = 1;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(uniphier_aio_dai_probe);
+
+int uniphier_aio_dai_remove(struct snd_soc_dai *dai)
+{
+	struct uniphier_aio *aio = uniphier_priv(dai);
+
+	aio->chip->active = 0;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(uniphier_aio_dai_remove);
+
+int uniphier_aio_dai_suspend(struct snd_soc_dai *dai)
+{
+	struct uniphier_aio *aio = uniphier_priv(dai);
+
+	reset_control_assert(aio->chip->rst);
+	clk_disable_unprepare(aio->chip->clk);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(uniphier_aio_dai_suspend);
+
+int uniphier_aio_dai_resume(struct snd_soc_dai *dai)
+{
+	struct uniphier_aio *aio = uniphier_priv(dai);
+	int ret, i;
+
+	if (!aio->chip->active)
+		return 0;
+
+	ret = clk_prepare_enable(aio->chip->clk);
+	if (ret)
+		return ret;
+
+	ret = reset_control_deassert(aio->chip->rst);
+	if (ret)
+		goto err_out_clock;
+
+	aio_chip_init(aio->chip);
+
+	for (i = 0; i < ARRAY_SIZE(aio->sub); i++) {
+		struct uniphier_aio_sub *sub = &aio->sub[i];
+
+		if (!sub->spec || !sub->substream)
+			continue;
+
+		ret = aio_init(sub);
+		if (ret)
+			goto err_out_clock;
+
+		if (!sub->setting)
+			continue;
+
+		aio_port_reset(sub);
+		aio_src_reset(sub);
+	}
+
+	return 0;
+
+err_out_clock:
+	clk_disable_unprepare(aio->chip->clk);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(uniphier_aio_dai_resume);
+
+static const struct snd_soc_component_driver uniphier_aio_component = {
+	.name = "uniphier-aio",
+};
+
+int uniphier_aio_probe(struct platform_device *pdev)
+{
+	struct uniphier_aio_chip *chip;
+	struct device *dev = &pdev->dev;
+	int ret, i, j;
+
+	chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	chip->chip_spec = of_device_get_match_data(dev);
+	if (!chip->chip_spec)
+		return -EINVAL;
+
+	chip->clk = devm_clk_get(dev, "aio");
+	if (IS_ERR(chip->clk))
+		return PTR_ERR(chip->clk);
+
+	chip->rst = devm_reset_control_get_shared(dev, "aio");
+	if (IS_ERR(chip->rst))
+		return PTR_ERR(chip->rst);
+
+	chip->num_aios = chip->chip_spec->num_dais;
+	chip->aios = devm_kzalloc(dev,
+				  sizeof(struct uniphier_aio) * chip->num_aios,
+				  GFP_KERNEL);
+	if (!chip->aios)
+		return -ENOMEM;
+
+	chip->num_plls = chip->chip_spec->num_plls;
+	chip->plls = devm_kzalloc(dev, sizeof(struct uniphier_aio_pll) *
+				  chip->num_plls, GFP_KERNEL);
+	if (!chip->plls)
+		return -ENOMEM;
+	memcpy(chip->plls, chip->chip_spec->plls,
+	       sizeof(struct uniphier_aio_pll) * chip->num_plls);
+
+	for (i = 0; i < chip->num_aios; i++) {
+		struct uniphier_aio *aio = &chip->aios[i];
+
+		aio->chip = chip;
+		aio->fmt = SND_SOC_DAIFMT_I2S;
+
+		for (j = 0; j < ARRAY_SIZE(aio->sub); j++) {
+			struct uniphier_aio_sub *sub = &aio->sub[j];
+
+			sub->aio = aio;
+			spin_lock_init(&sub->lock);
+		}
+	}
+
+	chip->pdev = pdev;
+	platform_set_drvdata(pdev, chip);
+
+	ret = clk_prepare_enable(chip->clk);
+	if (ret)
+		return ret;
+
+	ret = reset_control_deassert(chip->rst);
+	if (ret)
+		goto err_out_clock;
+
+	ret = devm_snd_soc_register_component(dev, &uniphier_aio_component,
+					      chip->chip_spec->dais,
+					      chip->chip_spec->num_dais);
+	if (ret) {
+		dev_err(dev, "Register component failed.\n");
+		goto err_out_reset;
+	}
+
+	ret = uniphier_aiodma_soc_register_platform(pdev);
+	if (ret) {
+		dev_err(dev, "Register platform failed.\n");
+		goto err_out_reset;
+	}
+
+	return 0;
+
+err_out_reset:
+	reset_control_assert(chip->rst);
+
+err_out_clock:
+	clk_disable_unprepare(chip->clk);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(uniphier_aio_probe);
+
+int uniphier_aio_remove(struct platform_device *pdev)
+{
+	struct uniphier_aio_chip *chip = platform_get_drvdata(pdev);
+
+	reset_control_assert(chip->rst);
+	clk_disable_unprepare(chip->clk);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(uniphier_aio_remove);
+
+MODULE_AUTHOR("Katsuhiro Suzuki <suzuki.katsuhiro@...ionext.com>");
+MODULE_DESCRIPTION("UniPhier AIO CPU DAI driver.");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/uniphier/aio.h b/sound/soc/uniphier/aio.h
index 3687f6ff30b1..b12e2e3d7699 100644
--- a/sound/soc/uniphier/aio.h
+++ b/sound/soc/uniphier/aio.h
@@ -306,6 +306,15 @@ static inline struct uniphier_aio *uniphier_priv(struct snd_soc_dai *dai)
 
 int uniphier_aiodma_soc_register_platform(struct platform_device *pdev);
 
+int uniphier_aio_dai_probe(struct snd_soc_dai *dai);
+int uniphier_aio_dai_remove(struct snd_soc_dai *dai);
+int uniphier_aio_dai_suspend(struct snd_soc_dai *dai);
+int uniphier_aio_dai_resume(struct snd_soc_dai *dai);
+int uniphier_aio_probe(struct platform_device *pdev);
+int uniphier_aio_remove(struct platform_device *pdev);
+extern const struct snd_soc_dai_ops uniphier_aio_i2s_ops;
+extern const struct snd_soc_dai_ops uniphier_aio_spdif_ops;
+
 u64 aio_rb_cnt(struct uniphier_aio_sub *sub);
 u64 aio_rbt_cnt_to_end(struct uniphier_aio_sub *sub);
 u64 aio_rb_space(struct uniphier_aio_sub *sub);
-- 
2.16.1

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