--- /dev/null
+/*
+ * ASoC Driver for Allo DigiOne
+ *
+ * Author: Baswaraj <jaikumar@cemsolutions.net>
+ * Copyright 2017
+ * based on code by Daniel Matuschek <info@crazy-audio.com>
+ * based on code by Florian Meier <florian.meier@koalo.de>
+ *
+ * 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 <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+#include <linux/gpio/consumer.h>
+
+#include "../codecs/wm8804.h"
+
+static short int auto_shutdown_output = 0;
+module_param(auto_shutdown_output, short,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
+MODULE_PARM_DESC(auto_shutdown_output, "Shutdown SP/DIF output if playback is stopped");
+
+#define CLK_44EN_RATE 22579200UL
+#define CLK_48EN_RATE 24576000UL
+
+static struct gpio_desc *snd_allo_clk44gpio;
+static struct gpio_desc *snd_allo_clk48gpio;
+
+static int samplerate = 44100;
+
+static uint32_t snd_allo_digione_enable_clock(int sample_rate)
+{
+ switch (sample_rate) {
+ case 11025:
+ case 22050:
+ case 44100:
+ case 88200:
+ case 176400:
+ gpiod_set_value_cansleep(snd_allo_clk44gpio, 1);
+ gpiod_set_value_cansleep(snd_allo_clk48gpio, 0);
+ return CLK_44EN_RATE;
+ default:
+ gpiod_set_value_cansleep(snd_allo_clk48gpio, 1);
+ gpiod_set_value_cansleep(snd_allo_clk44gpio, 0);
+ return CLK_48EN_RATE;
+ }
+}
+
+
+static int snd_allo_digione_init(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_codec *codec = rtd->codec;
+
+ /* enable TX output */
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
+
+ return 0;
+}
+
+static int snd_allo_digione_startup(struct snd_pcm_substream *substream)
+{
+ /* turn on digital output */
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_codec *codec = rtd->codec;
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x3c, 0x00);
+ return 0;
+}
+
+static void snd_allo_digione_shutdown(struct snd_pcm_substream *substream)
+{
+ /* turn off output */
+ if (auto_shutdown_output) {
+ /* turn off output */
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_codec *codec = rtd->codec;
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x3c, 0x3c);
+ }
+}
+
+static int snd_allo_digione_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_codec *codec = rtd->codec;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+
+ int sysclk = 27000000; /* This is fixed on this board */
+
+ long mclk_freq = 0;
+ int mclk_div = 1;
+ int sampling_freq = 1;
+
+ int ret;
+
+ samplerate = params_rate(params);
+
+ if (samplerate <= 96000) {
+ mclk_freq = samplerate * 256;
+ mclk_div = WM8804_MCLKDIV_256FS;
+ } else {
+ mclk_freq = samplerate * 128;
+ mclk_div = WM8804_MCLKDIV_128FS;
+ }
+
+ sysclk = snd_allo_digione_enable_clock(samplerate);
+
+ switch (samplerate) {
+ case 32000:
+ sampling_freq=0x03;
+ break;
+ case 44100:
+ sampling_freq=0x00;
+ break;
+ case 48000:
+ sampling_freq=0x02;
+ break;
+ case 88200:
+ sampling_freq=0x08;
+ break;
+ case 96000:
+ sampling_freq=0x0a;
+ break;
+ case 176400:
+ sampling_freq=0x0c;
+ break;
+ case 192000:
+ sampling_freq=0x0e;
+ break;
+ default:
+ dev_err(codec->dev,
+ "Failed to set WM8804 SYSCLK, unsupported samplerate %d\n",
+ samplerate);
+ }
+
+ snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
+ snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
+
+ ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
+ sysclk, SND_SOC_CLOCK_OUT);
+
+ if (ret < 0) {
+ dev_err(codec->dev,
+ "Failed to set WM8804 SYSCLK: %d\n", ret);
+ return ret;
+ }
+
+ /* Enable TX output */
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
+
+ /* Power on */
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
+
+ /* set sampling frequency status bits */
+ snd_soc_update_bits(codec, WM8804_SPDTX4, 0x0f, sampling_freq);
+
+ return snd_soc_dai_set_bclk_ratio(cpu_dai, 64);
+}
+
+/* machine stream operations */
+static struct snd_soc_ops snd_allo_digione_ops = {
+ .hw_params = snd_allo_digione_hw_params,
+ .startup = snd_allo_digione_startup,
+ .shutdown = snd_allo_digione_shutdown,
+};
+
+static struct snd_soc_dai_link snd_allo_digione_dai[] = {
+{
+ .name = "Allo DigiOne",
+ .stream_name = "Allo DigiOne HiFi",
+ .cpu_dai_name = "bcm2708-i2s.0",
+ .codec_dai_name = "wm8804-spdif",
+ .platform_name = "bcm2708-i2s.0",
+ .codec_name = "wm8804.1-003b",
+ .dai_fmt = SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBM_CFM,
+ .ops = &snd_allo_digione_ops,
+ .init = snd_allo_digione_init,
+},
+};
+
+/* audio machine driver */
+static struct snd_soc_card snd_allo_digione = {
+ .name = "snd_allo_digione",
+ .driver_name = "AlloDigiOne",
+ .owner = THIS_MODULE,
+ .dai_link = snd_allo_digione_dai,
+ .num_links = ARRAY_SIZE(snd_allo_digione_dai),
+};
+
+static int snd_allo_digione_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+
+ snd_allo_digione.dev = &pdev->dev;
+
+ if (pdev->dev.of_node) {
+ struct device_node *i2s_node;
+ struct snd_soc_dai_link *dai = &snd_allo_digione_dai[0];
+ i2s_node = of_parse_phandle(pdev->dev.of_node,
+ "i2s-controller", 0);
+
+ if (i2s_node) {
+ dai->cpu_dai_name = NULL;
+ dai->cpu_of_node = i2s_node;
+ dai->platform_name = NULL;
+ dai->platform_of_node = i2s_node;
+ }
+
+ snd_allo_clk44gpio =
+ devm_gpiod_get(&pdev->dev, "clock44", GPIOD_OUT_LOW);
+ if (IS_ERR(snd_allo_clk44gpio))
+ dev_err(&pdev->dev, "devm_gpiod_get() failed\n");
+
+ snd_allo_clk48gpio =
+ devm_gpiod_get(&pdev->dev, "clock48", GPIOD_OUT_LOW);
+ if (IS_ERR(snd_allo_clk48gpio))
+ dev_err(&pdev->dev, "devm_gpiod_get() failed\n");
+ }
+
+ ret = snd_soc_register_card(&snd_allo_digione);
+ if (ret && ret != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
+ ret);
+
+ return ret;
+}
+
+static int snd_allo_digione_remove(struct platform_device *pdev)
+{
+ return snd_soc_unregister_card(&snd_allo_digione);
+}
+
+static const struct of_device_id snd_allo_digione_of_match[] = {
+ { .compatible = "allo,allo-digione", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, snd_allo_digione_of_match);
+
+static struct platform_driver snd_allo_digione_driver = {
+ .driver = {
+ .name = "snd-allo-digione",
+ .owner = THIS_MODULE,
+ .of_match_table = snd_allo_digione_of_match,
+ },
+ .probe = snd_allo_digione_probe,
+ .remove = snd_allo_digione_remove,
+};
+
+module_platform_driver(snd_allo_digione_driver);
+
+MODULE_AUTHOR("Baswaraj <jaikumar@cem-solutions.net>");
+MODULE_DESCRIPTION("ASoC Driver for Allo DigiOne");
+MODULE_LICENSE("GPL v2");
projects / linux-4.9.git / commitdiff