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-rw-r--r--sound/soc/atmel/sam9g20_wm8731.c219
1 files changed, 219 insertions, 0 deletions
diff --git a/sound/soc/atmel/sam9g20_wm8731.c b/sound/soc/atmel/sam9g20_wm8731.c
new file mode 100644
index 0000000000..0405e9e491
--- /dev/null
+++ b/sound/soc/atmel/sam9g20_wm8731.c
@@ -0,0 +1,219 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based
+ * ATMEL AT91SAM9G20ek board.
+ *
+ * Copyright (C) 2005 SAN People
+ * Copyright (C) 2008 Atmel
+ *
+ * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
+ *
+ * Based on ati_b1_wm8731.c by:
+ * Frank Mandarino <fmandarino@endrelia.com>
+ * Copyright 2006 Endrelia Technologies Inc.
+ * Based on corgi.c by:
+ * Copyright 2005 Wolfson Microelectronics PLC.
+ * Copyright 2005 Openedhand Ltd.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+
+#include <linux/atmel-ssc.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "../codecs/wm8731.h"
+#include "atmel-pcm.h"
+#include "atmel_ssc_dai.h"
+
+#define MCLK_RATE 12000000
+
+/*
+ * As shipped the board does not have inputs. However, it is relatively
+ * straightforward to modify the board to hook them up so support is left
+ * in the driver.
+ */
+#undef ENABLE_MIC_INPUT
+
+static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
+ SND_SOC_DAPM_MIC("Int Mic", NULL),
+ SND_SOC_DAPM_SPK("Ext Spk", NULL),
+};
+
+static const struct snd_soc_dapm_route intercon[] = {
+
+ /* speaker connected to LHPOUT/RHPOUT */
+ {"Ext Spk", NULL, "LHPOUT"},
+ {"Ext Spk", NULL, "RHPOUT"},
+
+ /* mic is connected to Mic Jack, with WM8731 Mic Bias */
+ {"MICIN", NULL, "Mic Bias"},
+ {"Mic Bias", NULL, "Int Mic"},
+};
+
+/*
+ * Logic for a wm8731 as connected on a at91sam9g20ek board.
+ */
+static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
+ struct device *dev = rtd->dev;
+ int ret;
+
+ dev_dbg(dev, "%s called\n", __func__);
+
+ ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK,
+ MCLK_RATE, SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ dev_err(dev, "Failed to set WM8731 SYSCLK: %d\n", ret);
+ return ret;
+ }
+
+#ifndef ENABLE_MIC_INPUT
+ snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic");
+#endif
+
+ return 0;
+}
+
+SND_SOC_DAILINK_DEFS(pcm,
+ DAILINK_COMP_ARRAY(COMP_CPU("at91rm9200_ssc.0")),
+ DAILINK_COMP_ARRAY(COMP_CODEC("wm8731.0-001b", "wm8731-hifi")),
+ DAILINK_COMP_ARRAY(COMP_PLATFORM("at91rm9200_ssc.0")));
+
+static struct snd_soc_dai_link at91sam9g20ek_dai = {
+ .name = "WM8731",
+ .stream_name = "WM8731 PCM",
+ .init = at91sam9g20ek_wm8731_init,
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBP_CFP,
+#ifndef ENABLE_MIC_INPUT
+ .playback_only = true,
+#endif
+ SND_SOC_DAILINK_REG(pcm),
+};
+
+static struct snd_soc_card snd_soc_at91sam9g20ek = {
+ .name = "AT91SAMG20-EK",
+ .owner = THIS_MODULE,
+ .dai_link = &at91sam9g20ek_dai,
+ .num_links = 1,
+
+ .dapm_widgets = at91sam9g20ek_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets),
+ .dapm_routes = intercon,
+ .num_dapm_routes = ARRAY_SIZE(intercon),
+ .fully_routed = true,
+};
+
+static int at91sam9g20ek_audio_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *codec_np, *cpu_np;
+ struct snd_soc_card *card = &snd_soc_at91sam9g20ek;
+ int ret;
+
+ if (!np) {
+ return -ENODEV;
+ }
+
+ ret = atmel_ssc_set_audio(0);
+ if (ret) {
+ dev_err(&pdev->dev, "ssc channel is not valid: %d\n", ret);
+ return ret;
+ }
+
+ card->dev = &pdev->dev;
+
+ /* Parse device node info */
+ ret = snd_soc_of_parse_card_name(card, "atmel,model");
+ if (ret)
+ goto err;
+
+ ret = snd_soc_of_parse_audio_routing(card,
+ "atmel,audio-routing");
+ if (ret)
+ goto err;
+
+ /* Parse codec info */
+ at91sam9g20ek_dai.codecs->name = NULL;
+ codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
+ if (!codec_np) {
+ dev_err(&pdev->dev, "codec info missing\n");
+ ret = -EINVAL;
+ goto err;
+ }
+ at91sam9g20ek_dai.codecs->of_node = codec_np;
+
+ /* Parse dai and platform info */
+ at91sam9g20ek_dai.cpus->dai_name = NULL;
+ at91sam9g20ek_dai.platforms->name = NULL;
+ cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
+ if (!cpu_np) {
+ dev_err(&pdev->dev, "dai and pcm info missing\n");
+ of_node_put(codec_np);
+ ret = -EINVAL;
+ goto err;
+ }
+ at91sam9g20ek_dai.cpus->of_node = cpu_np;
+ at91sam9g20ek_dai.platforms->of_node = cpu_np;
+
+ of_node_put(codec_np);
+ of_node_put(cpu_np);
+
+ ret = snd_soc_register_card(card);
+ if (ret) {
+ dev_err_probe(&pdev->dev, ret,
+ "snd_soc_register_card() failed\n");
+ goto err;
+ }
+
+ return 0;
+
+err:
+ atmel_ssc_put_audio(0);
+ return ret;
+}
+
+static void at91sam9g20ek_audio_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+ snd_soc_unregister_card(card);
+ atmel_ssc_put_audio(0);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = {
+ { .compatible = "atmel,at91sam9g20ek-wm8731-audio", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids);
+#endif
+
+static struct platform_driver at91sam9g20ek_audio_driver = {
+ .driver = {
+ .name = "at91sam9g20ek-audio",
+ .of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids),
+ },
+ .probe = at91sam9g20ek_audio_probe,
+ .remove_new = at91sam9g20ek_audio_remove,
+};
+
+module_platform_driver(at91sam9g20ek_audio_driver);
+
+/* Module information */
+MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
+MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
+MODULE_ALIAS("platform:at91sam9g20ek-audio");
+MODULE_LICENSE("GPL");