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Diffstat (limited to 'sound/soc/atmel/sam9g20_wm8731.c')
-rw-r--r--sound/soc/atmel/sam9g20_wm8731.c291
1 files changed, 291 insertions, 0 deletions
diff --git a/sound/soc/atmel/sam9g20_wm8731.c b/sound/soc/atmel/sam9g20_wm8731.c
new file mode 100644
index 000000000..8de836165
--- /dev/null
+++ b/sound/soc/atmel/sam9g20_wm8731.c
@@ -0,0 +1,291 @@
+/*
+ * 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.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#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/i2c.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 struct clk *mclk;
+
+static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card,
+ struct snd_soc_dapm_context *dapm,
+ enum snd_soc_bias_level level)
+{
+ static int mclk_on;
+ int ret = 0;
+
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ case SND_SOC_BIAS_PREPARE:
+ if (!mclk_on)
+ ret = clk_enable(mclk);
+ if (ret == 0)
+ mclk_on = 1;
+ break;
+
+ case SND_SOC_BIAS_OFF:
+ case SND_SOC_BIAS_STANDBY:
+ if (mclk_on)
+ clk_disable(mclk);
+ mclk_on = 0;
+ break;
+ }
+
+ return ret;
+}
+
+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 */
+ {"Ext Spk", NULL, "LHPOUT"},
+
+ /* 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_codec *codec = rtd->codec;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct snd_soc_dapm_context *dapm = &codec->dapm;
+ int ret;
+
+ printk(KERN_DEBUG
+ "at91sam9g20ek_wm8731 "
+ ": at91sam9g20ek_wm8731_init() called\n");
+
+ ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK,
+ MCLK_RATE, SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret);
+ return ret;
+ }
+
+ /* not connected */
+ snd_soc_dapm_nc_pin(dapm, "RLINEIN");
+ snd_soc_dapm_nc_pin(dapm, "LLINEIN");
+
+#ifndef ENABLE_MIC_INPUT
+ snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic");
+#endif
+
+ return 0;
+}
+
+static struct snd_soc_dai_link at91sam9g20ek_dai = {
+ .name = "WM8731",
+ .stream_name = "WM8731 PCM",
+ .cpu_dai_name = "at91rm9200_ssc.0",
+ .codec_dai_name = "wm8731-hifi",
+ .init = at91sam9g20ek_wm8731_init,
+ .platform_name = "at91rm9200_ssc.0",
+ .codec_name = "wm8731.0-001b",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBM_CFM,
+};
+
+static struct snd_soc_card snd_soc_at91sam9g20ek = {
+ .name = "AT91SAMG20-EK",
+ .owner = THIS_MODULE,
+ .dai_link = &at91sam9g20ek_dai,
+ .num_links = 1,
+ .set_bias_level = at91sam9g20ek_set_bias_level,
+
+ .dapm_widgets = at91sam9g20ek_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets),
+ .dapm_routes = intercon,
+ .num_dapm_routes = ARRAY_SIZE(intercon),
+};
+
+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 clk *pllb;
+ 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\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Codec MCLK is supplied by PCK0 - set it up.
+ */
+ mclk = clk_get(NULL, "pck0");
+ if (IS_ERR(mclk)) {
+ printk(KERN_ERR "ASoC: Failed to get MCLK\n");
+ ret = PTR_ERR(mclk);
+ goto err;
+ }
+
+ pllb = clk_get(NULL, "pllb");
+ if (IS_ERR(pllb)) {
+ printk(KERN_ERR "ASoC: Failed to get PLLB\n");
+ ret = PTR_ERR(pllb);
+ goto err_mclk;
+ }
+ ret = clk_set_parent(mclk, pllb);
+ clk_put(pllb);
+ if (ret != 0) {
+ printk(KERN_ERR "ASoC: Failed to set MCLK parent\n");
+ goto err_mclk;
+ }
+
+ clk_set_rate(mclk, MCLK_RATE);
+
+ 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.codec_name = NULL;
+ codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
+ if (!codec_np) {
+ dev_err(&pdev->dev, "codec info missing\n");
+ return -EINVAL;
+ }
+ at91sam9g20ek_dai.codec_of_node = codec_np;
+
+ /* Parse dai and platform info */
+ at91sam9g20ek_dai.cpu_dai_name = NULL;
+ at91sam9g20ek_dai.platform_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");
+ return -EINVAL;
+ }
+ at91sam9g20ek_dai.cpu_of_node = cpu_np;
+ at91sam9g20ek_dai.platform_of_node = cpu_np;
+
+ of_node_put(codec_np);
+ of_node_put(cpu_np);
+
+ ret = snd_soc_register_card(card);
+ if (ret) {
+ printk(KERN_ERR "ASoC: snd_soc_register_card() failed\n");
+ }
+
+ return ret;
+
+err_mclk:
+ clk_put(mclk);
+ mclk = NULL;
+err:
+ atmel_ssc_put_audio(0);
+ return ret;
+}
+
+static int at91sam9g20ek_audio_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+ clk_disable(mclk);
+ mclk = NULL;
+ snd_soc_unregister_card(card);
+ atmel_ssc_put_audio(0);
+
+ return 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 = 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");
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-06 11:10:11 +0000