--- /dev/null
+/*
+ * ASoC Driver for AudioSense add on soundcard
+ * Author:
+ * Bhargav A K <anur.bhargav@gmail.com>
+ * Copyright 2017
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/i2c.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+#include <sound/control.h>
+
+#include <sound/tlv320aic32x4.h>
+#include "../codecs/tlv320aic32x4.h"
+
+#define AIC32X4_SYSCLK_XTAL 0x00
+
+/*
+ * Setup Codec Sample Rates and Channels
+ * Supported Rates:
+ * 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000, 88200, 96000,
+ */
+static const unsigned int audiosense_pi_rate[] = {
+ 48000,
+};
+
+static struct snd_pcm_hw_constraint_list audiosense_constraints_rates = {
+ .list = audiosense_pi_rate,
+ .count = ARRAY_SIZE(audiosense_pi_rate),
+};
+
+static const unsigned int audiosense_pi_channels[] = {
+ 2,
+};
+
+static struct snd_pcm_hw_constraint_list audiosense_constraints_ch = {
+ .count = ARRAY_SIZE(audiosense_pi_channels),
+ .list = audiosense_pi_channels,
+ .mask = 0,
+};
+
+/* Setup DAPM widgets and paths */
+static const struct snd_soc_dapm_widget audiosense_pi_dapm_widgets[] = {
+ SND_SOC_DAPM_HP("Headphone Jack", NULL),
+ SND_SOC_DAPM_LINE("Line Out", NULL),
+ SND_SOC_DAPM_LINE("Line In", NULL),
+ SND_SOC_DAPM_INPUT("CM_L"),
+ SND_SOC_DAPM_INPUT("CM_R"),
+};
+
+static const struct snd_soc_dapm_route audiosense_pi_audio_map[] = {
+ /* Line Inputs are connected to
+ * (IN1_L | IN1_R)
+ * (IN2_L | IN2_R)
+ * (IN3_L | IN3_R)
+ */
+ {"IN1_L", NULL, "Line In"},
+ {"IN1_R", NULL, "Line In"},
+ {"IN2_L", NULL, "Line In"},
+ {"IN2_R", NULL, "Line In"},
+ {"IN3_L", NULL, "Line In"},
+ {"IN3_R", NULL, "Line In"},
+
+ /* Mic is connected to IN2_L and IN2_R */
+ {"Left ADC", NULL, "Mic Bias"},
+ {"Right ADC", NULL, "Mic Bias"},
+
+ /* Headphone connected to HPL, HPR */
+ {"Headphone Jack", NULL, "HPL"},
+ {"Headphone Jack", NULL, "HPR"},
+
+ /* Speakers connected to LOL and LOR */
+ {"Line Out", NULL, "LOL"},
+ {"Line Out", NULL, "LOR"},
+};
+
+static int audiosense_pi_card_init(struct snd_soc_pcm_runtime *rtd)
+{
+ /* TODO: init of the codec specific dapm data, ignore suspend/resume */
+ struct snd_soc_component *component = rtd->codec_dai->component;
+
+ snd_soc_component_update_bits(component, AIC32X4_MICBIAS, 0x78,
+ AIC32X4_MICBIAS_LDOIN |
+ AIC32X4_MICBIAS_2075V);
+ snd_soc_component_update_bits(component, AIC32X4_PWRCFG, 0x08,
+ AIC32X4_AVDDWEAKDISABLE);
+ snd_soc_component_update_bits(component, AIC32X4_LDOCTL, 0x01,
+ AIC32X4_LDOCTLEN);
+
+ return 0;
+}
+
+static int audiosense_pi_card_hw_params(
+ struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ int ret = 0;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+
+ /* Set the codec system clock, there is a 12 MHz XTAL on the board */
+ ret = snd_soc_dai_set_sysclk(codec_dai, AIC32X4_SYSCLK_XTAL,
+ 12000000, SND_SOC_CLOCK_IN);
+ if (ret) {
+ dev_err(rtd->card->dev,
+ "could not set codec driver clock params\n");
+ return ret;
+ }
+ return 0;
+}
+
+static int audiosense_pi_card_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ /*
+ * Set codec to 48Khz Sampling, Stereo I/O and 16 bit audio
+ */
+ runtime->hw.channels_max = 2;
+ snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+ &audiosense_constraints_ch);
+
+ runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE;
+ snd_pcm_hw_constraint_msbits(runtime, 0, 16, 16);
+
+
+ snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ &audiosense_constraints_rates);
+ return 0;
+}
+
+static struct snd_soc_ops audiosense_pi_card_ops = {
+ .startup = audiosense_pi_card_startup,
+ .hw_params = audiosense_pi_card_hw_params,
+};
+
+static struct snd_soc_dai_link audiosense_pi_card_dai[] = {
+ {
+ .name = "TLV320AIC3204 Audio",
+ .stream_name = "TLV320AIC3204 Hifi Audio",
+ .cpu_dai_name = "bcm2708-i2s.0",
+ .codec_dai_name = "tlv320aic32x4-hifi",
+ .platform_name = "bcm2708-i2s.0",
+ .codec_name = "tlv320aic32x4.1-0018",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBM_CFM,
+ .ops = &audiosense_pi_card_ops,
+ .init = audiosense_pi_card_init,
+ },
+};
+
+static struct snd_soc_card audiosense_pi_card = {
+ .name = "audiosense-pi",
+ .driver_name = "audiosense-pi",
+ .dai_link = audiosense_pi_card_dai,
+ .owner = THIS_MODULE,
+ .num_links = ARRAY_SIZE(audiosense_pi_card_dai),
+ .dapm_widgets = audiosense_pi_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(audiosense_pi_dapm_widgets),
+ .dapm_routes = audiosense_pi_audio_map,
+ .num_dapm_routes = ARRAY_SIZE(audiosense_pi_audio_map),
+};
+
+static int audiosense_pi_card_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct snd_soc_card *card = &audiosense_pi_card;
+ struct snd_soc_dai_link *dai = &audiosense_pi_card_dai[0];
+ struct device_node *i2s_node = pdev->dev.of_node;
+
+ card->dev = &pdev->dev;
+
+ if (!dai) {
+ dev_err(&pdev->dev, "DAI not found. Missing or Invalid\n");
+ return -EINVAL;
+ }
+
+ i2s_node = of_parse_phandle(pdev->dev.of_node, "i2s-controller", 0);
+ if (!i2s_node) {
+ dev_err(&pdev->dev,
+ "Property 'i2s-controller' missing or invalid\n");
+ return -EINVAL;
+ }
+
+ dai->cpu_dai_name = NULL;
+ dai->cpu_of_node = i2s_node;
+ dai->platform_name = NULL;
+ dai->platform_of_node = i2s_node;
+
+ of_node_put(i2s_node);
+
+ ret = snd_soc_register_card(card);
+ if (ret && ret != -EPROBE_DEFER)
+ dev_err(&pdev->dev,
+ "snd_soc_register_card() failed: %d\n", ret);
+
+ return ret;
+}
+
+static int audiosense_pi_card_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+ return snd_soc_unregister_card(card);
+
+}
+
+static const struct of_device_id audiosense_pi_card_of_match[] = {
+ { .compatible = "as,audiosense-pi", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, audiosense_pi_card_of_match);
+
+static struct platform_driver audiosense_pi_card_driver = {
+ .driver = {
+ .name = "audiosense-snd-card",
+ .owner = THIS_MODULE,
+ .of_match_table = audiosense_pi_card_of_match,
+ },
+ .probe = audiosense_pi_card_probe,
+ .remove = audiosense_pi_card_remove,
+};
+
+module_platform_driver(audiosense_pi_card_driver);
+
+MODULE_AUTHOR("Bhargav AK <anur.bhargav@gmail.com>");
+MODULE_DESCRIPTION("ASoC Driver for TLV320AIC3204 Audio");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:audiosense-pi");
+
projects / platform / kernel / linux-rpi3.git / commitdiff