+++ /dev/null
-From 6af5a0adda5b782ad2e134b405ca168895c89b0c Mon Sep 17 00:00:00 2001
-From: Tim Gover <tim.gover@raspberrypi.org>
-Date: Sat, 21 Jul 2018 20:07:46 +0100
-Subject: [PATCH] ASoC: Create a generic Pi Hat WM8804 driver
-
-Reduce the amount of duplicated code by creating a generic driver for
-Pi Hat digi cards using the WM8804 codec.
-
-This replaces the
-Allo DigiOne, Hifiberry Digi/Pro, JustBoom Digi and IQAudIO Digi
-dedicate soundcard drivers with a generic driver.
-
-There are no significant changes to the runtime behavior of the drivers
-and end users should not have to change any configuration settings
-after upgrading.
-
-Minor changes
-* Check the return value of snd_soc_component_update_bits
-* Added some pr_debug tracing
-* Various checkpatch tidyups
-* Updated allodigi-one to use use 128FS at > 96 Khz. This appears to
- be an omission in the original driver code so followed the Hifiberry
- DAC driver approach.
----
- sound/soc/bcm/rpi-wm8804-soundcard.c | 428 +++++++++++++++++++++++++++
- 1 file changed, 428 insertions(+)
- create mode 100644 sound/soc/bcm/rpi-wm8804-soundcard.c
-
---- /dev/null
-+++ b/sound/soc/bcm/rpi-wm8804-soundcard.c
-@@ -0,0 +1,428 @@
-+// SPDX-License-Identifier: GPL-2.0
-+/*
-+ * rpi--wm8804.c -- ALSA SoC Raspberry Pi soundcard.
-+ *
-+ * Copyright (C) 2018 Raspberry Pi.
-+ *
-+ * Authors: Tim Gover <tim.gover@raspberrypi.org>
-+ *
-+ * Generic driver for Pi Hat WM8804 digi sounds cards
-+ *
-+ * Based upon code from:
-+ * justboom-digi.c
-+ * by Milan Neskovic <info@justboom.co>
-+ *
-+ * iqaudio_digi.c
-+ * by Daniel Matuschek <info@crazy-audio.com>
-+ *
-+ * allo-digione.c
-+ * by Baswaraj <jaikumar@cem-solutions.net>
-+ *
-+ * hifiberry-digi.c
-+ * Daniel Matuschek <info@crazy-audio.com>
-+ *
-+ * 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/gpio/consumer.h>
-+#include <linux/platform_device.h>
-+#include <linux/module.h>
-+
-+#include <sound/core.h>
-+#include <sound/pcm.h>
-+#include <sound/pcm_params.h>
-+#include <sound/soc.h>
-+
-+#include "../codecs/wm8804.h"
-+
-+struct wm8804_clk_cfg {
-+ unsigned int sysclk_freq;
-+ unsigned int mclk_freq;
-+ unsigned int mclk_div;
-+};
-+
-+/* Parameters for generic functions */
-+struct snd_rpi_wm8804_drvdata {
-+ /* Required - pointer to the DAI structure */
-+ struct snd_soc_dai_link *dai;
-+ /* Required - snd_soc_card name */
-+ const char *card_name;
-+ /* Optional- Overrides the module paramter */
-+ unsigned short auto_shutdown_output;
-+ /* Optional DT node names if card info is defined in DT */
-+ const char *card_name_dt;
-+ const char *dai_name_dt;
-+ const char *dai_stream_name_dt;
-+ /* Optional probe extension - called prior to register_card */
-+ int (*probe)(struct platform_device *pdev);
-+};
-+
-+static short int auto_shutdown_output;
-+module_param(auto_shutdown_output, short, 0660);
-+MODULE_PARM_DESC(auto_shutdown_output, "Shutdown SP/DIF output if playback is stopped");
-+
-+static struct gpio_desc *snd_clk44gpio;
-+static struct gpio_desc *snd_clk48gpio;
-+
-+#define CLK_44EN_RATE 22579200UL
-+#define CLK_48EN_RATE 24576000UL
-+
-+static int snd_rpi_wm8804_init(struct snd_soc_pcm_runtime *rtd)
-+{
-+ struct snd_soc_component *component = rtd->codec_dai->component;
-+ int rc;
-+
-+ pr_debug("%s\n", __func__);
-+
-+ rc = snd_soc_component_update_bits(component, WM8804_PWRDN, 0x4, 0x0);
-+ return rc < 0 ? rc : 0;
-+}
-+
-+static int snd_rpi_wm8804_digi_startup(struct snd_pcm_substream *substream)
-+{
-+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
-+ struct snd_soc_component *component = rtd->codec_dai->component;
-+ int rc;
-+
-+ pr_debug("%s\n", __func__);
-+
-+ rc = snd_soc_component_update_bits(component, WM8804_PWRDN, 0x3c, 0x00);
-+ return rc < 0 ? rc : 0;
-+}
-+
-+static void snd_rpi_wm8804_digi_shutdown(struct snd_pcm_substream *substream)
-+{
-+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
-+ struct snd_soc_component *component = rtd->codec_dai->component;
-+
-+ pr_debug("%s %d\n", __func__, auto_shutdown_output);
-+
-+ if (auto_shutdown_output)
-+ snd_soc_component_update_bits(component, WM8804_PWRDN,
-+ 0x3c, 0x3c);
-+}
-+
-+static unsigned int snd_rpi_wm8804_enable_clock(unsigned int samplerate)
-+{
-+ switch (samplerate) {
-+ case 11025:
-+ case 22050:
-+ case 44100:
-+ case 88200:
-+ case 176400:
-+ gpiod_set_value_cansleep(snd_clk44gpio, 1);
-+ gpiod_set_value_cansleep(snd_clk48gpio, 0);
-+ return CLK_44EN_RATE;
-+ default:
-+ gpiod_set_value_cansleep(snd_clk48gpio, 1);
-+ gpiod_set_value_cansleep(snd_clk44gpio, 0);
-+ return CLK_48EN_RATE;
-+ }
-+}
-+
-+static void snd_rpi_wm8804_clk_cfg(unsigned int samplerate,
-+ struct wm8804_clk_cfg *clk_cfg)
-+{
-+ clk_cfg->mclk_freq = 0;
-+ clk_cfg->mclk_div = 1;
-+ clk_cfg->sysclk_freq = 27000000;
-+
-+ if (samplerate <= 96000) {
-+ clk_cfg->mclk_freq = samplerate * 256;
-+ clk_cfg->mclk_div = WM8804_MCLKDIV_256FS;
-+ } else {
-+ clk_cfg->mclk_freq = samplerate * 128;
-+ clk_cfg->mclk_div = WM8804_MCLKDIV_128FS;
-+ }
-+
-+ if (!(IS_ERR(snd_clk44gpio) || IS_ERR(snd_clk48gpio)))
-+ clk_cfg->sysclk_freq = snd_rpi_wm8804_enable_clock(samplerate);
-+}
-+
-+static int snd_rpi_wm8804_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_component *component = rtd->codec_dai->component;
-+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-+ int sampling_freq = 1;
-+ int ret;
-+ struct wm8804_clk_cfg clk_cfg;
-+ int samplerate = params_rate(params);
-+
-+ snd_rpi_wm8804_clk_cfg(samplerate, &clk_cfg);
-+
-+ pr_debug("%s samplerate: %d mclk_freq: %u mclk_div: %u sysclk: %u\n",
-+ __func__, samplerate, clk_cfg.mclk_freq,
-+ clk_cfg.mclk_div, clk_cfg.sysclk_freq);
-+
-+ 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(rtd->card->dev,
-+ "Failed to set WM8804 SYSCLK, unsupported samplerate %d\n",
-+ samplerate);
-+ }
-+
-+ snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, clk_cfg.mclk_div);
-+ snd_soc_dai_set_pll(codec_dai, 0, 0,
-+ clk_cfg.sysclk_freq, clk_cfg.mclk_freq);
-+
-+ ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
-+ clk_cfg.sysclk_freq, SND_SOC_CLOCK_OUT);
-+ if (ret < 0) {
-+ dev_err(rtd->card->dev,
-+ "Failed to set WM8804 SYSCLK: %d\n", ret);
-+ return ret;
-+ }
-+
-+ /* Enable TX output */
-+ snd_soc_component_update_bits(component, WM8804_PWRDN, 0x4, 0x0);
-+
-+ /* Power on */
-+ snd_soc_component_update_bits(component, WM8804_PWRDN, 0x9, 0);
-+
-+ /* set sampling frequency status bits */
-+ snd_soc_component_update_bits(component, WM8804_SPDTX4, 0x0f,
-+ sampling_freq);
-+
-+ return snd_soc_dai_set_bclk_ratio(cpu_dai, 64);
-+}
-+
-+static struct snd_soc_ops snd_rpi_wm8804_ops = {
-+ .hw_params = snd_rpi_wm8804_hw_params,
-+ .startup = snd_rpi_wm8804_digi_startup,
-+ .shutdown = snd_rpi_wm8804_digi_shutdown,
-+};
-+
-+static struct snd_soc_dai_link snd_justboom_digi_dai[] = {
-+{
-+ .name = "JustBoom Digi",
-+ .stream_name = "JustBoom Digi HiFi",
-+},
-+};
-+
-+static struct snd_rpi_wm8804_drvdata drvdata_justboom_digi = {
-+ .card_name = "snd_rpi_justboom_digi",
-+ .dai = snd_justboom_digi_dai,
-+ .auto_shutdown_output = 1,
-+};
-+
-+static struct snd_soc_dai_link snd_iqaudio_digi_dai[] = {
-+{
-+ .name = "IQAudIO Digi",
-+ .stream_name = "IQAudIO Digi HiFi",
-+},
-+};
-+
-+static struct snd_rpi_wm8804_drvdata drvdata_iqaudio_digi = {
-+ .card_name = "IQAudIODigi",
-+ .dai = snd_iqaudio_digi_dai,
-+ .card_name_dt = "wm8804-digi,card-name",
-+ .dai_name_dt = "wm8804-digi,dai-name",
-+ .dai_stream_name_dt = "wm8804-digi,dai-stream-name",
-+};
-+
-+static int snd_allo_digione_probe(struct platform_device *pdev)
-+{
-+ pr_debug("%s\n", __func__);
-+
-+ if (IS_ERR(snd_clk44gpio) || IS_ERR(snd_clk48gpio)) {
-+ dev_err(&pdev->dev, "devm_gpiod_get() failed\n");
-+ return -EINVAL;
-+ }
-+ return 0;
-+}
-+
-+static struct snd_soc_dai_link snd_allo_digione_dai[] = {
-+{
-+ .name = "Allo DigiOne",
-+ .stream_name = "Allo DigiOne HiFi",
-+},
-+};
-+
-+static struct snd_rpi_wm8804_drvdata drvdata_allo_digione = {
-+ .card_name = "snd_allo_digione",
-+ .dai = snd_allo_digione_dai,
-+ .probe = snd_allo_digione_probe,
-+};
-+
-+static struct snd_soc_dai_link snd_hifiberry_digi_dai[] = {
-+{
-+ .name = "HifiBerry Digi",
-+ .stream_name = "HifiBerry Digi HiFi",
-+},
-+};
-+
-+static int snd_hifiberry_digi_probe(struct platform_device *pdev)
-+{
-+ pr_debug("%s\n", __func__);
-+
-+ if (IS_ERR(snd_clk44gpio) || IS_ERR(snd_clk48gpio))
-+ return 0;
-+
-+ snd_hifiberry_digi_dai->name = "HiFiBerry Digi+ Pro";
-+ snd_hifiberry_digi_dai->stream_name = "HiFiBerry Digi+ Pro HiFi";
-+ return 0;
-+}
-+
-+static struct snd_rpi_wm8804_drvdata drvdata_hifiberry_digi = {
-+ .card_name = "snd_rpi_hifiberry_digi",
-+ .dai = snd_hifiberry_digi_dai,
-+ .probe = snd_hifiberry_digi_probe,
-+};
-+
-+static const struct of_device_id snd_rpi_wm8804_of_match[] = {
-+ { .compatible = "justboom,justboom-digi",
-+ .data = (void *) &drvdata_justboom_digi },
-+ { .compatible = "iqaudio,wm8804-digi",
-+ .data = (void *) &drvdata_iqaudio_digi },
-+ { .compatible = "allo,allo-digione",
-+ .data = (void *) &drvdata_allo_digione },
-+ { .compatible = "hifiberry,hifiberry-digi",
-+ .data = (void *) &drvdata_hifiberry_digi },
-+ {},
-+};
-+
-+static struct snd_soc_card snd_rpi_wm8804 = {
-+ .driver_name = "RPi-WM8804",
-+ .owner = THIS_MODULE,
-+ .dai_link = NULL,
-+ .num_links = 1,
-+};
-+
-+static int snd_rpi_wm8804_probe(struct platform_device *pdev)
-+{
-+ int ret = 0;
-+ const struct of_device_id *of_id;
-+
-+ snd_rpi_wm8804.dev = &pdev->dev;
-+ of_id = of_match_node(snd_rpi_wm8804_of_match, pdev->dev.of_node);
-+
-+ if (pdev->dev.of_node && of_id->data) {
-+ struct device_node *i2s_node;
-+ struct snd_rpi_wm8804_drvdata *drvdata =
-+ (struct snd_rpi_wm8804_drvdata *) of_id->data;
-+ struct snd_soc_dai_link *dai = drvdata->dai;
-+
-+ snd_soc_card_set_drvdata(&snd_rpi_wm8804, drvdata);
-+
-+ if (!dai->init)
-+ dai->init = snd_rpi_wm8804_init;
-+ if (!dai->ops)
-+ dai->ops = &snd_rpi_wm8804_ops;
-+ if (!dai->codec_dai_name)
-+ dai->codec_dai_name = "wm8804-spdif";
-+ if (!dai->codec_name)
-+ dai->codec_name = "wm8804.1-003b";
-+ if (!dai->dai_fmt)
-+ dai->dai_fmt = SND_SOC_DAIFMT_I2S |
-+ SND_SOC_DAIFMT_NB_NF |
-+ SND_SOC_DAIFMT_CBM_CFM;
-+
-+ if (drvdata->auto_shutdown_output)
-+ auto_shutdown_output = 1;
-+
-+ snd_rpi_wm8804.dai_link = dai;
-+ i2s_node = of_parse_phandle(pdev->dev.of_node,
-+ "i2s-controller", 0);
-+ if (!i2s_node) {
-+ pr_err("Failed to find i2s-controller DT node\n");
-+ return -ENODEV;
-+ }
-+
-+ snd_rpi_wm8804.name = drvdata->card_name;
-+
-+ /* If requested by in drvdata get card & DAI names from DT */
-+ if (drvdata->card_name_dt)
-+ of_property_read_string(i2s_node,
-+ drvdata->card_name_dt,
-+ &snd_rpi_wm8804.name);
-+
-+ if (drvdata->dai_name_dt)
-+ of_property_read_string(i2s_node,
-+ drvdata->dai_name_dt,
-+ &dai->name);
-+
-+ if (drvdata->dai_stream_name_dt)
-+ of_property_read_string(i2s_node,
-+ drvdata->dai_stream_name_dt,
-+ &dai->stream_name);
-+
-+ dai->cpu_of_node = i2s_node;
-+ dai->platform_of_node = i2s_node;
-+
-+ /*
-+ * clk44gpio and clk48gpio are not required by all cards so
-+ * don't check the error status.
-+ */
-+ snd_clk44gpio =
-+ devm_gpiod_get(&pdev->dev, "clock44", GPIOD_OUT_LOW);
-+
-+ snd_clk48gpio =
-+ devm_gpiod_get(&pdev->dev, "clock48", GPIOD_OUT_LOW);
-+
-+ if (drvdata->probe) {
-+ ret = drvdata->probe(pdev);
-+ if (ret < 0) {
-+ dev_err(&pdev->dev, "Custom probe failed %d\n",
-+ ret);
-+ return ret;
-+ }
-+ }
-+
-+ pr_debug("%s card: %s dai: %s stream: %s\n", __func__,
-+ snd_rpi_wm8804.name,
-+ dai->name, dai->stream_name);
-+ }
-+
-+ ret = devm_snd_soc_register_card(&pdev->dev, &snd_rpi_wm8804);
-+ if (ret && ret != -EPROBE_DEFER)
-+ dev_err(&pdev->dev, "Failed to register card %d\n", ret);
-+
-+ return ret;
-+}
-+
-+static struct platform_driver snd_rpi_wm8804_driver = {
-+ .driver = {
-+ .name = "snd-rpi-wm8804",
-+ .owner = THIS_MODULE,
-+ .of_match_table = snd_rpi_wm8804_of_match,
-+ },
-+ .probe = snd_rpi_wm8804_probe,
-+};
-+MODULE_DEVICE_TABLE(of, snd_rpi_wm8804_of_match);
-+
-+module_platform_driver(snd_rpi_wm8804_driver);
-+
-+MODULE_AUTHOR("Tim Gover <tim.gover@raspberrypi.org>");
-+MODULE_DESCRIPTION("ASoC Raspberry Pi Hat generic digi driver for WM8804 based cards");
-+MODULE_LICENSE("GPL v2");
projects / openwrt / staging / chunkeey.git / blobdiff