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-rw-r--r--sound/soc/atmel/mikroe-proto.c184
1 files changed, 184 insertions, 0 deletions
diff --git a/sound/soc/atmel/mikroe-proto.c b/sound/soc/atmel/mikroe-proto.c
new file mode 100644
index 000000000..954460719
--- /dev/null
+++ b/sound/soc/atmel/mikroe-proto.c
@@ -0,0 +1,184 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ASoC driver for PROTO AudioCODEC (with a WM8731)
+ *
+ * Author: Florian Meier, <koalo@koalo.de>
+ * Copyright 2013
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+
+#include "../codecs/wm8731.h"
+
+#define XTAL_RATE 12288000 /* This is fixed on this board */
+
+static int snd_proto_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_card *card = rtd->card;
+ struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
+
+ /* Set proto sysclk */
+ int ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
+ XTAL_RATE, SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ dev_err(card->dev, "Failed to set WM8731 SYSCLK: %d\n",
+ ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_dapm_widget snd_proto_widget[] = {
+ SND_SOC_DAPM_MIC("Microphone Jack", NULL),
+ SND_SOC_DAPM_HP("Headphone Jack", NULL),
+};
+
+static const struct snd_soc_dapm_route snd_proto_route[] = {
+ /* speaker connected to LHPOUT/RHPOUT */
+ {"Headphone Jack", NULL, "LHPOUT"},
+ {"Headphone Jack", NULL, "RHPOUT"},
+
+ /* mic is connected to Mic Jack, with WM8731 Mic Bias */
+ {"MICIN", NULL, "Mic Bias"},
+ {"Mic Bias", NULL, "Microphone Jack"},
+};
+
+/* audio machine driver */
+static struct snd_soc_card snd_proto = {
+ .name = "snd_mikroe_proto",
+ .owner = THIS_MODULE,
+ .dapm_widgets = snd_proto_widget,
+ .num_dapm_widgets = ARRAY_SIZE(snd_proto_widget),
+ .dapm_routes = snd_proto_route,
+ .num_dapm_routes = ARRAY_SIZE(snd_proto_route),
+};
+
+static int snd_proto_probe(struct platform_device *pdev)
+{
+ struct snd_soc_dai_link *dai;
+ struct snd_soc_dai_link_component *comp;
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *codec_np, *cpu_np;
+ struct device_node *bitclkmaster = NULL;
+ struct device_node *framemaster = NULL;
+ unsigned int dai_fmt;
+ int ret = 0;
+
+ if (!np) {
+ dev_err(&pdev->dev, "No device node supplied\n");
+ return -EINVAL;
+ }
+
+ snd_proto.dev = &pdev->dev;
+ ret = snd_soc_of_parse_card_name(&snd_proto, "model");
+ if (ret)
+ return ret;
+
+ dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);
+ if (!dai)
+ return -ENOMEM;
+
+ /* for cpus/codecs/platforms */
+ comp = devm_kzalloc(&pdev->dev, 3 * sizeof(*comp), GFP_KERNEL);
+ if (!comp)
+ return -ENOMEM;
+
+ snd_proto.dai_link = dai;
+ snd_proto.num_links = 1;
+
+ dai->cpus = &comp[0];
+ dai->num_cpus = 1;
+ dai->codecs = &comp[1];
+ dai->num_codecs = 1;
+ dai->platforms = &comp[2];
+ dai->num_platforms = 1;
+
+ dai->name = "WM8731";
+ dai->stream_name = "WM8731 HiFi";
+ dai->codecs->dai_name = "wm8731-hifi";
+ dai->init = &snd_proto_init;
+
+ codec_np = of_parse_phandle(np, "audio-codec", 0);
+ if (!codec_np) {
+ dev_err(&pdev->dev, "audio-codec node missing\n");
+ return -EINVAL;
+ }
+ dai->codecs->of_node = codec_np;
+
+ cpu_np = of_parse_phandle(np, "i2s-controller", 0);
+ if (!cpu_np) {
+ dev_err(&pdev->dev, "i2s-controller missing\n");
+ ret = -EINVAL;
+ goto put_codec_node;
+ }
+ dai->cpus->of_node = cpu_np;
+ dai->platforms->of_node = cpu_np;
+
+ dai_fmt = snd_soc_daifmt_parse_format(np, NULL);
+ snd_soc_daifmt_parse_clock_provider_as_phandle(np, NULL,
+ &bitclkmaster, &framemaster);
+ if (bitclkmaster != framemaster) {
+ dev_err(&pdev->dev, "Must be the same bitclock and frame master\n");
+ ret = -EINVAL;
+ goto put_cpu_node;
+ }
+ if (bitclkmaster) {
+ if (codec_np == bitclkmaster)
+ dai_fmt |= SND_SOC_DAIFMT_CBP_CFP;
+ else
+ dai_fmt |= SND_SOC_DAIFMT_CBC_CFC;
+ } else {
+ dai_fmt |= snd_soc_daifmt_parse_clock_provider_as_flag(np, NULL);
+ }
+
+
+ dai->dai_fmt = dai_fmt;
+ ret = snd_soc_register_card(&snd_proto);
+ if (ret)
+ dev_err_probe(&pdev->dev, ret,
+ "snd_soc_register_card() failed\n");
+
+
+put_cpu_node:
+ of_node_put(bitclkmaster);
+ of_node_put(framemaster);
+ of_node_put(cpu_np);
+put_codec_node:
+ of_node_put(codec_np);
+ return ret;
+}
+
+static int snd_proto_remove(struct platform_device *pdev)
+{
+ snd_soc_unregister_card(&snd_proto);
+
+ return 0;
+}
+
+static const struct of_device_id snd_proto_of_match[] = {
+ { .compatible = "mikroe,mikroe-proto", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, snd_proto_of_match);
+
+static struct platform_driver snd_proto_driver = {
+ .driver = {
+ .name = "snd-mikroe-proto",
+ .of_match_table = snd_proto_of_match,
+ },
+ .probe = snd_proto_probe,
+ .remove = snd_proto_remove,
+};
+
+module_platform_driver(snd_proto_driver);
+
+MODULE_AUTHOR("Florian Meier");
+MODULE_DESCRIPTION("ASoC Driver for PROTO board (WM8731)");
+MODULE_LICENSE("GPL");