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266 lines
7.4 KiB
266 lines
7.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* rpi--wm8804.c -- ALSA SoC Raspberry Pi soundcard. |
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* |
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* Authors: Johannes Krude <[email protected] |
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* |
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* Driver for when connecting simultaneously justboom-digi and justboom-dac |
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* |
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* Based upon code from: |
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* justboom-digi.c |
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* by Milan Neskovic <[email protected]> |
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* justboom-dac.c |
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* by Milan Neskovic <[email protected]> |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* version 2 as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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*/ |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <sound/core.h> |
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#include <sound/pcm.h> |
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#include <sound/pcm_params.h> |
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#include <sound/soc.h> |
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#include <sound/jack.h> |
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#include "../codecs/wm8804.h" |
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#include "../codecs/pcm512x.h" |
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static bool digital_gain_0db_limit = true; |
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static int snd_rpi_justboom_both_init(struct snd_soc_pcm_runtime *rtd) |
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{ |
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struct snd_soc_component *digi = asoc_rtd_to_codec(rtd, 0)->component; |
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struct snd_soc_component *dac = asoc_rtd_to_codec(rtd, 1)->component; |
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/* enable TX output */ |
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snd_soc_component_update_bits(digi, WM8804_PWRDN, 0x4, 0x0); |
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snd_soc_component_update_bits(dac, PCM512x_GPIO_EN, 0x08, 0x08); |
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snd_soc_component_update_bits(dac, PCM512x_GPIO_OUTPUT_4, 0xf, 0x02); |
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snd_soc_component_update_bits(dac, PCM512x_GPIO_CONTROL_1, 0x08, 0x08); |
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if (digital_gain_0db_limit) { |
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int ret; |
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struct snd_soc_card *card = rtd->card; |
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ret = snd_soc_limit_volume(card, "Digital Playback Volume", |
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207); |
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if (ret < 0) |
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dev_warn(card->dev, "Failed to set volume limit: %d\n", |
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ret); |
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} |
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return 0; |
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} |
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static int snd_rpi_justboom_both_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params) |
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{ |
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struct snd_soc_pcm_runtime *rtd = substream->private_data; |
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); |
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struct snd_soc_component *digi = asoc_rtd_to_codec(rtd, 0)->component; |
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); |
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int sysclk = 27000000; /* This is fixed on this board */ |
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long mclk_freq = 0; |
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int mclk_div = 1; |
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int sampling_freq = 1; |
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int ret; |
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int samplerate = params_rate(params); |
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if (samplerate <= 96000) { |
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mclk_freq = samplerate*256; |
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mclk_div = WM8804_MCLKDIV_256FS; |
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} else { |
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mclk_freq = samplerate*128; |
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mclk_div = WM8804_MCLKDIV_128FS; |
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} |
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switch (samplerate) { |
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case 32000: |
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sampling_freq = 0x03; |
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break; |
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case 44100: |
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sampling_freq = 0x00; |
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break; |
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case 48000: |
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sampling_freq = 0x02; |
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break; |
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case 88200: |
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sampling_freq = 0x08; |
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break; |
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case 96000: |
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sampling_freq = 0x0a; |
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break; |
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case 176400: |
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sampling_freq = 0x0c; |
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break; |
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case 192000: |
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sampling_freq = 0x0e; |
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break; |
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default: |
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dev_err(rtd->card->dev, |
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"Failed to set WM8804 SYSCLK, unsupported samplerate %d\n", |
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samplerate); |
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} |
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snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div); |
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snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq); |
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ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL, |
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sysclk, SND_SOC_CLOCK_OUT); |
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if (ret < 0) { |
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dev_err(rtd->card->dev, |
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"Failed to set WM8804 SYSCLK: %d\n", ret); |
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return ret; |
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} |
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/* Enable TX output */ |
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snd_soc_component_update_bits(digi, WM8804_PWRDN, 0x4, 0x0); |
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/* Power on */ |
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snd_soc_component_update_bits(digi, WM8804_PWRDN, 0x9, 0); |
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/* set sampling frequency status bits */ |
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snd_soc_component_update_bits(digi, WM8804_SPDTX4, 0x0f, sampling_freq); |
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return snd_soc_dai_set_bclk_ratio(cpu_dai, 64); |
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} |
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static int snd_rpi_justboom_both_startup(struct snd_pcm_substream *substream) |
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{ |
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struct snd_soc_pcm_runtime *rtd = substream->private_data; |
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struct snd_soc_component *digi = asoc_rtd_to_codec(rtd, 0)->component; |
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struct snd_soc_component *dac = asoc_rtd_to_codec(rtd, 1)->component; |
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/* turn on digital output */ |
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snd_soc_component_update_bits(digi, WM8804_PWRDN, 0x3c, 0x00); |
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snd_soc_component_update_bits(dac, PCM512x_GPIO_CONTROL_1, 0x08, 0x08); |
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return 0; |
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} |
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static void snd_rpi_justboom_both_shutdown(struct snd_pcm_substream *substream) |
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{ |
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struct snd_soc_pcm_runtime *rtd = substream->private_data; |
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struct snd_soc_component *digi = asoc_rtd_to_codec(rtd, 0)->component; |
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struct snd_soc_component *dac = asoc_rtd_to_codec(rtd, 1)->component; |
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snd_soc_component_update_bits(dac, PCM512x_GPIO_CONTROL_1, 0x08, 0x00); |
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/* turn off output */ |
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snd_soc_component_update_bits(digi, WM8804_PWRDN, 0x3c, 0x3c); |
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} |
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/* machine stream operations */ |
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static struct snd_soc_ops snd_rpi_justboom_both_ops = { |
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.hw_params = snd_rpi_justboom_both_hw_params, |
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.startup = snd_rpi_justboom_both_startup, |
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.shutdown = snd_rpi_justboom_both_shutdown, |
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}; |
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SND_SOC_DAILINK_DEFS(rpi_justboom_both, |
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DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")), |
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DAILINK_COMP_ARRAY(COMP_CODEC("pcm512x.1-004d", "pcm512x-hifi"), |
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COMP_CODEC("wm8804.1-003b", "wm8804-spdif")), |
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DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0"))); |
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static struct snd_soc_dai_link snd_rpi_justboom_both_dai[] = { |
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{ |
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.name = "JustBoom Digi", |
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.stream_name = "JustBoom Digi HiFi", |
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.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | |
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SND_SOC_DAIFMT_CBM_CFM, |
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.ops = &snd_rpi_justboom_both_ops, |
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.init = snd_rpi_justboom_both_init, |
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SND_SOC_DAILINK_REG(rpi_justboom_both), |
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}, |
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}; |
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/* audio machine driver */ |
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static struct snd_soc_card snd_rpi_justboom_both = { |
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.name = "snd_rpi_justboom_both", |
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.driver_name = "JustBoomBoth", |
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.owner = THIS_MODULE, |
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.dai_link = snd_rpi_justboom_both_dai, |
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.num_links = ARRAY_SIZE(snd_rpi_justboom_both_dai), |
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}; |
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static int snd_rpi_justboom_both_probe(struct platform_device *pdev) |
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{ |
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int ret = 0; |
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struct snd_soc_card *card = &snd_rpi_justboom_both; |
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snd_rpi_justboom_both.dev = &pdev->dev; |
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if (pdev->dev.of_node) { |
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struct device_node *i2s_node; |
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struct snd_soc_dai_link *dai = &snd_rpi_justboom_both_dai[0]; |
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i2s_node = of_parse_phandle(pdev->dev.of_node, |
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"i2s-controller", 0); |
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if (i2s_node) { |
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int i; |
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for (i = 0; i < card->num_links; i++) { |
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dai->cpus->dai_name = NULL; |
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dai->cpus->of_node = i2s_node; |
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dai->platforms->name = NULL; |
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dai->platforms->of_node = i2s_node; |
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} |
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} |
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digital_gain_0db_limit = !of_property_read_bool( |
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pdev->dev.of_node, "justboom,24db_digital_gain"); |
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} |
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ret = snd_soc_register_card(card); |
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if (ret && ret != -EPROBE_DEFER) { |
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dev_err(&pdev->dev, |
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"snd_soc_register_card() failed: %d\n", ret); |
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} |
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return ret; |
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} |
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static int snd_rpi_justboom_both_remove(struct platform_device *pdev) |
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{ |
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return snd_soc_unregister_card(&snd_rpi_justboom_both); |
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} |
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static const struct of_device_id snd_rpi_justboom_both_of_match[] = { |
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{ .compatible = "justboom,justboom-both", }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, snd_rpi_justboom_both_of_match); |
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static struct platform_driver snd_rpi_justboom_both_driver = { |
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.driver = { |
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.name = "snd-rpi-justboom-both", |
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.owner = THIS_MODULE, |
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.of_match_table = snd_rpi_justboom_both_of_match, |
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}, |
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.probe = snd_rpi_justboom_both_probe, |
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.remove = snd_rpi_justboom_both_remove, |
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}; |
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module_platform_driver(snd_rpi_justboom_both_driver); |
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MODULE_AUTHOR("Johannes Krude <[email protected]>"); |
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MODULE_DESCRIPTION("ASoC Driver for simultaneous use of JustBoom PI Digi & DAC HAT Sound Cards"); |
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MODULE_LICENSE("GPL v2");
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