ASoC: tegra: add tegra sgtl5000 machine driver

This binding and driver describe/support playback to headphones, and
capture from line-in and microphone.

This driver is useful for the Toradex Apalis T30, Apalis TK1 and
Colibri T30 modules.

Signed-off-by: Marcel Ziswiler <marcel@ziswiler.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

4 files changed, 267 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/nvidia,tegra-audio-sgtl5000.txt b/Documentation/devicetree/bindings/sound/nvidia,tegra-audio-sgtl5000.txt
new file mode 100644
index 000000000000..5da7da4ea07a
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/nvidia,tegra-audio-sgtl5000.txt
@@ -0,0 +1,42 @@
+NVIDIA Tegra audio complex, with SGTL5000 CODEC
+
+Required properties:
+- compatible : "nvidia,tegra-audio-sgtl5000"
+- clocks : Must contain an entry for each entry in clock-names.
+  See ../clocks/clock-bindings.txt for details.
+- clock-names : Must include the following entries:
+  - pll_a
+  - pll_a_out0
+  - mclk (The Tegra cdev1/extern1 clock, which feeds the CODEC's mclk)
+- nvidia,model : The user-visible name of this sound complex.
+- nvidia,audio-routing : A list of the connections between audio components.
+  Each entry is a pair of strings, the first being the connection's sink,
+  the second being the connection's source. Valid names for sources and
+  sinks are the SGTL5000's pins (as documented in its binding), and the jacks
+  on the board:
+
+  * Headphone Jack
+  * Line In Jack
+  * Mic Jack
+
+- nvidia,i2s-controller : The phandle of the Tegra I2S controller that's
+  connected to the CODEC.
+- nvidia,audio-codec : The phandle of the SGTL5000 audio codec.
+
+Example:
+
+sound {
+        compatible = "toradex,tegra-audio-sgtl5000-apalis_t30",
+                     "nvidia,tegra-audio-sgtl5000";
+        nvidia,model = "Toradex Apalis T30";
+        nvidia,audio-routing =
+                "Headphone Jack", "HP_OUT",
+                "LINE_IN", "Line In Jack",
+                "MIC_IN", "Mic Jack";
+        nvidia,i2s-controller = <&tegra_i2s2>;
+        nvidia,audio-codec = <&sgtl5000>;
+        clocks = <&tegra_car TEGRA30_CLK_PLL_A>,
+                 <&tegra_car TEGRA30_CLK_PLL_A_OUT0>,
+                 <&tegra_car TEGRA30_CLK_EXTERN1>;
+        clock-names = "pll_a", "pll_a_out0", "mclk";
+};
diff --git a/sound/soc/tegra/Kconfig b/sound/soc/tegra/Kconfig
index a6768f832c6f..efbe8d4c019e 100644
--- a/sound/soc/tegra/Kconfig
+++ b/sound/soc/tegra/Kconfig
@@ -138,3 +138,14 @@ config SND_SOC_TEGRA_RT5677
         help
           Say Y or M here if you want to add support for SoC audio on Tegra
           boards using the RT5677 codec, such as Ryu.
+
+config SND_SOC_TEGRA_SGTL5000
+        tristate "SoC Audio support for Tegra boards using a SGTL5000 codec"
+        depends on SND_SOC_TEGRA && I2C && GPIOLIB
+        select SND_SOC_TEGRA20_I2S if ARCH_TEGRA_2x_SOC
+        select SND_SOC_TEGRA30_I2S if ARCH_TEGRA_3x_SOC
+        select SND_SOC_SGTL5000
+        help
+          Say Y or M here if you want to add support for SoC audio on Tegra
+          boards using the SGTL5000 codec, such as Apalis T30, Apalis TK1 or
+          Colibri T30.
diff --git a/sound/soc/tegra/Makefile b/sound/soc/tegra/Makefile
index 9171655ad843..f214a3fd0024 100644
--- a/sound/soc/tegra/Makefile
+++ b/sound/soc/tegra/Makefile
@@ -26,6 +26,7 @@ snd-soc-tegra-wm9712-objs := tegra_wm9712.o
 snd-soc-tegra-trimslice-objs := trimslice.o
 snd-soc-tegra-alc5632-objs := tegra_alc5632.o
 snd-soc-tegra-max98090-objs := tegra_max98090.o
+snd-soc-tegra-sgtl5000-objs := tegra_sgtl5000.o
 
 obj-$(CONFIG_SND_SOC_TEGRA_RT5640) += snd-soc-tegra-rt5640.o
 obj-$(CONFIG_SND_SOC_TEGRA_RT5677) += snd-soc-tegra-rt5677.o
@@ -35,3 +36,4 @@ obj-$(CONFIG_SND_SOC_TEGRA_WM9712) += snd-soc-tegra-wm9712.o
 obj-$(CONFIG_SND_SOC_TEGRA_TRIMSLICE) += snd-soc-tegra-trimslice.o
 obj-$(CONFIG_SND_SOC_TEGRA_ALC5632) += snd-soc-tegra-alc5632.o
 obj-$(CONFIG_SND_SOC_TEGRA_MAX98090) += snd-soc-tegra-max98090.o
+obj-$(CONFIG_SND_SOC_TEGRA_SGTL5000) += snd-soc-tegra-sgtl5000.o
\ No newline at end of file
diff --git a/sound/soc/tegra/tegra_sgtl5000.c b/sound/soc/tegra/tegra_sgtl5000.c
new file mode 100644
index 000000000000..1e76869dd488
--- /dev/null
+++ b/sound/soc/tegra/tegra_sgtl5000.c
@@ -0,0 +1,212 @@
+/*
+ * tegra_sgtl5000.c - Tegra machine ASoC driver for boards using SGTL5000 codec
+ *
+ * Author: Marcel Ziswiler <marcel@ziswiler.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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/>.
+ *
+ * Based on code copyright/by:
+ *
+ * Copyright (C) 2010-2012 - NVIDIA, Inc.
+ * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
+ * Copyright 2007 Wolfson Microelectronics PLC.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "../codecs/sgtl5000.h"
+
+#include "tegra_asoc_utils.h"
+
+#define DRV_NAME "tegra-snd-sgtl5000"
+
+struct tegra_sgtl5000 {
+        struct tegra_asoc_utils_data util_data;
+};
+
+static int tegra_sgtl5000_hw_params(struct snd_pcm_substream *substream,
+                                        struct snd_pcm_hw_params *params)
+{
+        struct snd_soc_pcm_runtime *rtd = substream->private_data;
+        struct snd_soc_dai *codec_dai = rtd->codec_dai;
+        struct snd_soc_card *card = rtd->card;
+        struct tegra_sgtl5000 *machine = snd_soc_card_get_drvdata(card);
+        int srate, mclk;
+        int err;
+
+        srate = params_rate(params);
+        switch (srate) {
+        case 11025:
+        case 22050:
+        case 44100:
+        case 88200:
+                mclk = 11289600;
+                break;
+        default:
+                mclk = 12288000;
+                break;
+        }
+
+        err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
+        if (err < 0) {
+                dev_err(card->dev, "Can't configure clocks\n");
+                return err;
+        }
+
+        err = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk,
+                                     SND_SOC_CLOCK_IN);
+        if (err < 0) {
+                dev_err(card->dev, "codec_dai clock not set\n");
+                return err;
+        }
+
+        return 0;
+}
+
+static struct snd_soc_ops tegra_sgtl5000_ops = {
+        .hw_params = tegra_sgtl5000_hw_params,
+};
+
+static const struct snd_soc_dapm_widget tegra_sgtl5000_dapm_widgets[] = {
+        SND_SOC_DAPM_HP("Headphone Jack", NULL),
+        SND_SOC_DAPM_LINE("Line In Jack", NULL),
+        SND_SOC_DAPM_MIC("Mic Jack", NULL),
+};
+
+static struct snd_soc_dai_link tegra_sgtl5000_dai = {
+        .name = "sgtl5000",
+        .stream_name = "HiFi",
+        .codec_dai_name = "sgtl5000",
+        .ops = &tegra_sgtl5000_ops,
+        .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+                        SND_SOC_DAIFMT_CBS_CFS,
+};
+
+static struct snd_soc_card snd_soc_tegra_sgtl5000 = {
+        .name = "tegra-sgtl5000",
+        .owner = THIS_MODULE,
+        .dai_link = &tegra_sgtl5000_dai,
+        .num_links = 1,
+        .dapm_widgets = tegra_sgtl5000_dapm_widgets,
+        .num_dapm_widgets = ARRAY_SIZE(tegra_sgtl5000_dapm_widgets),
+        .fully_routed = true,
+};
+
+static int tegra_sgtl5000_driver_probe(struct platform_device *pdev)
+{
+        struct device_node *np = pdev->dev.of_node;
+        struct snd_soc_card *card = &snd_soc_tegra_sgtl5000;
+        struct tegra_sgtl5000 *machine;
+        int ret;
+
+        machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_sgtl5000),
+                               GFP_KERNEL);
+        if (!machine) {
+                dev_err(&pdev->dev, "Can't allocate tegra_sgtl5000 struct\n");
+                return -ENOMEM;
+        }
+
+        card->dev = &pdev->dev;
+        platform_set_drvdata(pdev, card);
+        snd_soc_card_set_drvdata(card, machine);
+
+        ret = snd_soc_of_parse_card_name(card, "nvidia,model");
+        if (ret)
+                goto err;
+
+        ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
+        if (ret)
+                goto err;
+
+        tegra_sgtl5000_dai.codec_of_node = of_parse_phandle(np,
+                        "nvidia,audio-codec", 0);
+        if (!tegra_sgtl5000_dai.codec_of_node) {
+                dev_err(&pdev->dev,
+                        "Property 'nvidia,audio-codec' missing or invalid\n");
+                ret = -EINVAL;
+                goto err;
+        }
+
+        tegra_sgtl5000_dai.cpu_of_node = of_parse_phandle(np,
+                        "nvidia,i2s-controller", 0);
+        if (!tegra_sgtl5000_dai.cpu_of_node) {
+                dev_err(&pdev->dev,
+                        "Property 'nvidia,i2s-controller' missing/invalid\n");
+                ret = -EINVAL;
+                goto err;
+        }
+
+        tegra_sgtl5000_dai.platform_of_node = tegra_sgtl5000_dai.cpu_of_node;
+
+        ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
+        if (ret)
+                goto err;
+
+        ret = snd_soc_register_card(card);
+        if (ret) {
+                dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
+                        ret);
+                goto err_fini_utils;
+        }
+
+        return 0;
+
+err_fini_utils:
+        tegra_asoc_utils_fini(&machine->util_data);
+err:
+        return ret;
+}
+
+static int tegra_sgtl5000_driver_remove(struct platform_device *pdev)
+{
+        struct snd_soc_card *card = platform_get_drvdata(pdev);
+        struct tegra_sgtl5000 *machine = snd_soc_card_get_drvdata(card);
+        int ret;
+
+        ret = snd_soc_unregister_card(card);
+
+        tegra_asoc_utils_fini(&machine->util_data);
+
+        return ret;
+}
+
+static const struct of_device_id tegra_sgtl5000_of_match[] = {
+        { .compatible = "nvidia,tegra-audio-sgtl5000", },
+        { /* sentinel */ },
+};
+
+static struct platform_driver tegra_sgtl5000_driver = {
+        .driver = {
+                .name = DRV_NAME,
+                .pm = &snd_soc_pm_ops,
+                .of_match_table = tegra_sgtl5000_of_match,
+        },
+        .probe = tegra_sgtl5000_driver_probe,
+        .remove = tegra_sgtl5000_driver_remove,
+};
+module_platform_driver(tegra_sgtl5000_driver);
+
+MODULE_AUTHOR("Marcel Ziswiler <marcel@ziswiler.com>");
+MODULE_DESCRIPTION("Tegra SGTL5000 machine ASoC driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRV_NAME);
+MODULE_DEVICE_TABLE(of, tegra_sgtl5000_of_match);