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410 lines
11 KiB
410 lines
11 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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* Copyright (C) 2018 Raspberry Pi. |
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* |
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* Authors: Tim Gover <[email protected]> |
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* |
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* Generic driver for Pi Hat WM8804 digi sounds cards |
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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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* |
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* iqaudio_digi.c |
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* by Daniel Matuschek <[email protected]> |
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* |
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* allo-digione.c |
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* by Baswaraj <[email protected]> |
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* |
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* hifiberry-digi.c |
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* Daniel Matuschek <[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/gpio/consumer.h> |
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#include <linux/platform_device.h> |
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#include <linux/module.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 "../codecs/wm8804.h" |
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struct wm8804_clk_cfg { |
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unsigned int sysclk_freq; |
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unsigned int mclk_freq; |
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unsigned int mclk_div; |
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}; |
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/* Parameters for generic functions */ |
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struct snd_rpi_wm8804_drvdata { |
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/* Required - pointer to the DAI structure */ |
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struct snd_soc_dai_link *dai; |
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/* Required - snd_soc_card name */ |
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const char *card_name; |
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/* Optional DT node names if card info is defined in DT */ |
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const char *card_name_dt; |
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const char *dai_name_dt; |
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const char *dai_stream_name_dt; |
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/* Optional probe extension - called prior to register_card */ |
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int (*probe)(struct platform_device *pdev); |
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}; |
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static struct gpio_desc *snd_clk44gpio; |
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static struct gpio_desc *snd_clk48gpio; |
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static int wm8804_samplerate = 0; |
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/* Forward declarations */ |
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static struct snd_soc_dai_link snd_allo_digione_dai[]; |
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static struct snd_soc_card snd_rpi_wm8804; |
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#define CLK_44EN_RATE 22579200UL |
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#define CLK_48EN_RATE 24576000UL |
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static unsigned int snd_rpi_wm8804_enable_clock(unsigned int samplerate) |
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{ |
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switch (samplerate) { |
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case 11025: |
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case 22050: |
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case 44100: |
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case 88200: |
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case 176400: |
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gpiod_set_value_cansleep(snd_clk44gpio, 1); |
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gpiod_set_value_cansleep(snd_clk48gpio, 0); |
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return CLK_44EN_RATE; |
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default: |
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gpiod_set_value_cansleep(snd_clk48gpio, 1); |
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gpiod_set_value_cansleep(snd_clk44gpio, 0); |
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return CLK_48EN_RATE; |
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} |
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} |
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static void snd_rpi_wm8804_clk_cfg(unsigned int samplerate, |
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struct wm8804_clk_cfg *clk_cfg) |
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{ |
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clk_cfg->sysclk_freq = 27000000; |
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if (samplerate <= 96000 || |
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snd_rpi_wm8804.dai_link == snd_allo_digione_dai) { |
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clk_cfg->mclk_freq = samplerate * 256; |
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clk_cfg->mclk_div = WM8804_MCLKDIV_256FS; |
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} else { |
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clk_cfg->mclk_freq = samplerate * 128; |
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clk_cfg->mclk_div = WM8804_MCLKDIV_128FS; |
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} |
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if (!(IS_ERR(snd_clk44gpio) || IS_ERR(snd_clk48gpio))) |
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clk_cfg->sysclk_freq = snd_rpi_wm8804_enable_clock(samplerate); |
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} |
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static int snd_rpi_wm8804_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 *component = 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 sampling_freq = 1; |
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int ret; |
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struct wm8804_clk_cfg clk_cfg; |
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int samplerate = params_rate(params); |
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if (samplerate == wm8804_samplerate) |
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return 0; |
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/* clear until all clocks are setup properly */ |
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wm8804_samplerate = 0; |
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snd_rpi_wm8804_clk_cfg(samplerate, &clk_cfg); |
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pr_debug("%s samplerate: %d mclk_freq: %u mclk_div: %u sysclk: %u\n", |
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__func__, samplerate, clk_cfg.mclk_freq, |
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clk_cfg.mclk_div, clk_cfg.sysclk_freq); |
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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, clk_cfg.mclk_div); |
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snd_soc_dai_set_pll(codec_dai, 0, 0, |
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clk_cfg.sysclk_freq, clk_cfg.mclk_freq); |
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ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL, |
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clk_cfg.sysclk_freq, 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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wm8804_samplerate = samplerate; |
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/* set sampling frequency status bits */ |
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snd_soc_component_update_bits(component, WM8804_SPDTX4, 0x0f, |
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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 struct snd_soc_ops snd_rpi_wm8804_ops = { |
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.hw_params = snd_rpi_wm8804_hw_params, |
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}; |
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SND_SOC_DAILINK_DEFS(justboom_digi, |
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DAILINK_COMP_ARRAY(COMP_EMPTY()), |
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DAILINK_COMP_ARRAY(COMP_EMPTY()), |
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DAILINK_COMP_ARRAY(COMP_EMPTY())); |
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static struct snd_soc_dai_link snd_justboom_digi_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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SND_SOC_DAILINK_REG(justboom_digi), |
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}, |
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}; |
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static struct snd_rpi_wm8804_drvdata drvdata_justboom_digi = { |
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.card_name = "snd_rpi_justboom_digi", |
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.dai = snd_justboom_digi_dai, |
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}; |
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SND_SOC_DAILINK_DEFS(iqaudio_digi, |
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DAILINK_COMP_ARRAY(COMP_EMPTY()), |
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DAILINK_COMP_ARRAY(COMP_EMPTY()), |
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DAILINK_COMP_ARRAY(COMP_EMPTY())); |
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static struct snd_soc_dai_link snd_iqaudio_digi_dai[] = { |
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{ |
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.name = "IQAudIO Digi", |
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.stream_name = "IQAudIO Digi HiFi", |
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SND_SOC_DAILINK_REG(iqaudio_digi), |
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}, |
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}; |
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static struct snd_rpi_wm8804_drvdata drvdata_iqaudio_digi = { |
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.card_name = "IQAudIODigi", |
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.dai = snd_iqaudio_digi_dai, |
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.card_name_dt = "wm8804-digi,card-name", |
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.dai_name_dt = "wm8804-digi,dai-name", |
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.dai_stream_name_dt = "wm8804-digi,dai-stream-name", |
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}; |
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static int snd_allo_digione_probe(struct platform_device *pdev) |
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{ |
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pr_debug("%s\n", __func__); |
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if (IS_ERR(snd_clk44gpio) || IS_ERR(snd_clk48gpio)) { |
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dev_err(&pdev->dev, "devm_gpiod_get() failed\n"); |
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return -EINVAL; |
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} |
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return 0; |
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} |
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SND_SOC_DAILINK_DEFS(allo_digione, |
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DAILINK_COMP_ARRAY(COMP_EMPTY()), |
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DAILINK_COMP_ARRAY(COMP_EMPTY()), |
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DAILINK_COMP_ARRAY(COMP_EMPTY())); |
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static struct snd_soc_dai_link snd_allo_digione_dai[] = { |
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{ |
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.name = "Allo DigiOne", |
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.stream_name = "Allo DigiOne HiFi", |
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SND_SOC_DAILINK_REG(allo_digione), |
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}, |
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}; |
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static struct snd_rpi_wm8804_drvdata drvdata_allo_digione = { |
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.card_name = "snd_allo_digione", |
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.dai = snd_allo_digione_dai, |
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.probe = snd_allo_digione_probe, |
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}; |
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SND_SOC_DAILINK_DEFS(hifiberry_digi, |
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DAILINK_COMP_ARRAY(COMP_EMPTY()), |
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DAILINK_COMP_ARRAY(COMP_EMPTY()), |
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DAILINK_COMP_ARRAY(COMP_EMPTY())); |
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static struct snd_soc_dai_link snd_hifiberry_digi_dai[] = { |
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{ |
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.name = "HifiBerry Digi", |
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.stream_name = "HifiBerry Digi HiFi", |
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SND_SOC_DAILINK_REG(hifiberry_digi), |
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}, |
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}; |
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static int snd_hifiberry_digi_probe(struct platform_device *pdev) |
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{ |
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pr_debug("%s\n", __func__); |
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if (IS_ERR(snd_clk44gpio) || IS_ERR(snd_clk48gpio)) |
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return 0; |
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snd_hifiberry_digi_dai->name = "HiFiBerry Digi+ Pro"; |
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snd_hifiberry_digi_dai->stream_name = "HiFiBerry Digi+ Pro HiFi"; |
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return 0; |
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} |
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static struct snd_rpi_wm8804_drvdata drvdata_hifiberry_digi = { |
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.card_name = "snd_rpi_hifiberry_digi", |
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.dai = snd_hifiberry_digi_dai, |
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.probe = snd_hifiberry_digi_probe, |
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}; |
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static const struct of_device_id snd_rpi_wm8804_of_match[] = { |
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{ .compatible = "justboom,justboom-digi", |
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.data = (void *) &drvdata_justboom_digi }, |
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{ .compatible = "iqaudio,wm8804-digi", |
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.data = (void *) &drvdata_iqaudio_digi }, |
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{ .compatible = "allo,allo-digione", |
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.data = (void *) &drvdata_allo_digione }, |
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{ .compatible = "hifiberry,hifiberry-digi", |
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.data = (void *) &drvdata_hifiberry_digi }, |
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{}, |
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}; |
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static struct snd_soc_card snd_rpi_wm8804 = { |
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.driver_name = "RPi-WM8804", |
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.owner = THIS_MODULE, |
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.dai_link = NULL, |
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.num_links = 1, |
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}; |
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static int snd_rpi_wm8804_probe(struct platform_device *pdev) |
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{ |
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int ret = 0; |
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const struct of_device_id *of_id; |
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snd_rpi_wm8804.dev = &pdev->dev; |
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of_id = of_match_node(snd_rpi_wm8804_of_match, pdev->dev.of_node); |
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if (pdev->dev.of_node && of_id->data) { |
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struct device_node *i2s_node; |
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struct snd_rpi_wm8804_drvdata *drvdata = |
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(struct snd_rpi_wm8804_drvdata *) of_id->data; |
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struct snd_soc_dai_link *dai = drvdata->dai; |
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snd_soc_card_set_drvdata(&snd_rpi_wm8804, drvdata); |
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if (!dai->ops) |
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dai->ops = &snd_rpi_wm8804_ops; |
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if (!dai->codecs->dai_name) |
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dai->codecs->dai_name = "wm8804-spdif"; |
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if (!dai->codecs->name) |
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dai->codecs->name = "wm8804.1-003b"; |
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if (!dai->dai_fmt) |
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dai->dai_fmt = SND_SOC_DAIFMT_I2S | |
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SND_SOC_DAIFMT_NB_NF | |
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SND_SOC_DAIFMT_CBM_CFM; |
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snd_rpi_wm8804.dai_link = dai; |
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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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pr_err("Failed to find i2s-controller DT node\n"); |
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return -ENODEV; |
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} |
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snd_rpi_wm8804.name = drvdata->card_name; |
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/* If requested by in drvdata get card & DAI names from DT */ |
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if (drvdata->card_name_dt) |
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of_property_read_string(i2s_node, |
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drvdata->card_name_dt, |
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&snd_rpi_wm8804.name); |
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if (drvdata->dai_name_dt) |
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of_property_read_string(i2s_node, |
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drvdata->dai_name_dt, |
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&dai->name); |
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if (drvdata->dai_stream_name_dt) |
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of_property_read_string(i2s_node, |
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drvdata->dai_stream_name_dt, |
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&dai->stream_name); |
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dai->cpus->of_node = i2s_node; |
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dai->platforms->of_node = i2s_node; |
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/* |
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* clk44gpio and clk48gpio are not required by all cards so |
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* don't check the error status. |
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*/ |
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snd_clk44gpio = |
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devm_gpiod_get(&pdev->dev, "clock44", GPIOD_OUT_LOW); |
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snd_clk48gpio = |
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devm_gpiod_get(&pdev->dev, "clock48", GPIOD_OUT_LOW); |
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if (drvdata->probe) { |
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ret = drvdata->probe(pdev); |
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if (ret < 0) { |
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dev_err(&pdev->dev, "Custom probe failed %d\n", |
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ret); |
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return ret; |
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} |
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} |
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pr_debug("%s card: %s dai: %s stream: %s\n", __func__, |
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snd_rpi_wm8804.name, |
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dai->name, dai->stream_name); |
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} |
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ret = devm_snd_soc_register_card(&pdev->dev, &snd_rpi_wm8804); |
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if (ret && ret != -EPROBE_DEFER) |
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dev_err(&pdev->dev, "Failed to register card %d\n", ret); |
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return ret; |
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} |
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static struct platform_driver snd_rpi_wm8804_driver = { |
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.driver = { |
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.name = "snd-rpi-wm8804", |
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.owner = THIS_MODULE, |
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.of_match_table = snd_rpi_wm8804_of_match, |
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}, |
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.probe = snd_rpi_wm8804_probe, |
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}; |
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MODULE_DEVICE_TABLE(of, snd_rpi_wm8804_of_match); |
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module_platform_driver(snd_rpi_wm8804_driver); |
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MODULE_AUTHOR("Tim Gover <[email protected]>"); |
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MODULE_DESCRIPTION("ASoC Raspberry Pi Hat generic digi driver for WM8804 based cards"); |
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MODULE_LICENSE("GPL v2");
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