smdk_wm8994.c

  1// SPDX-License-Identifier: GPL-2.0+
  2
  3#include "../codecs/wm8994.h"
  4#include <sound/pcm_params.h>
  5#include <sound/soc.h>
  6#include <linux/module.h>
  7#include <linux/of.h>
  8
  9 /*
 10  * Default CFG switch settings to use this driver:
 11  *	SMDKV310: CFG5-1000, CFG7-111111
 12  */
 13
 14 /*
 15  * Configure audio route as :-
 16  * $ amixer sset 'DAC1' on,on
 17  * $ amixer sset 'Right Headphone Mux' 'DAC'
 18  * $ amixer sset 'Left Headphone Mux' 'DAC'
 19  * $ amixer sset 'DAC1R Mixer AIF1.1' on
 20  * $ amixer sset 'DAC1L Mixer AIF1.1' on
 21  * $ amixer sset 'IN2L' on
 22  * $ amixer sset 'IN2L PGA IN2LN' on
 23  * $ amixer sset 'MIXINL IN2L' on
 24  * $ amixer sset 'AIF1ADC1L Mixer ADC/DMIC' on
 25  * $ amixer sset 'IN2R' on
 26  * $ amixer sset 'IN2R PGA IN2RN' on
 27  * $ amixer sset 'MIXINR IN2R' on
 28  * $ amixer sset 'AIF1ADC1R Mixer ADC/DMIC' on
 29  */
 30
 31/* SMDK has a 16.934MHZ crystal attached to WM8994 */
 32#define SMDK_WM8994_FREQ 16934000
 33
 34static int smdk_hw_params(struct snd_pcm_substream *substream,
 35	struct snd_pcm_hw_params *params)
 36{
 37	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 38	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
 39	unsigned int pll_out;
 40	int ret;
 41
 42	/* AIF1CLK should be >=3MHz for optimal performance */
 43	if (params_width(params) == 24)
 44		pll_out = params_rate(params) * 384;
 45	else if (params_rate(params) == 8000 || params_rate(params) == 11025)
 46		pll_out = params_rate(params) * 512;
 47	else
 48		pll_out = params_rate(params) * 256;
 49
 50	ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
 51					SMDK_WM8994_FREQ, pll_out);
 52	if (ret < 0)
 53		return ret;
 54
 55	ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
 56					pll_out, SND_SOC_CLOCK_IN);
 57	if (ret < 0)
 58		return ret;
 59
 60	return 0;
 61}
 62
 63/*
 64 * SMDK WM8994 DAI operations.
 65 */
 66static const struct snd_soc_ops smdk_ops = {
 67	.hw_params = smdk_hw_params,
 68};
 69
 70static int smdk_wm8994_init_paiftx(struct snd_soc_pcm_runtime *rtd)
 71{
 72	struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(rtd->card);
 73
 74	/* Other pins NC */
 75	snd_soc_dapm_disable_pin(dapm, "HPOUT2P");
 76	snd_soc_dapm_disable_pin(dapm, "HPOUT2N");
 77	snd_soc_dapm_disable_pin(dapm, "SPKOUTLN");
 78	snd_soc_dapm_disable_pin(dapm, "SPKOUTLP");
 79	snd_soc_dapm_disable_pin(dapm, "SPKOUTRP");
 80	snd_soc_dapm_disable_pin(dapm, "SPKOUTRN");
 81	snd_soc_dapm_disable_pin(dapm, "LINEOUT1N");
 82	snd_soc_dapm_disable_pin(dapm, "LINEOUT1P");
 83	snd_soc_dapm_disable_pin(dapm, "LINEOUT2N");
 84	snd_soc_dapm_disable_pin(dapm, "LINEOUT2P");
 85	snd_soc_dapm_disable_pin(dapm, "IN1LP");
 86	snd_soc_dapm_disable_pin(dapm, "IN2LP:VXRN");
 87	snd_soc_dapm_disable_pin(dapm, "IN1RP");
 88	snd_soc_dapm_disable_pin(dapm, "IN2RP:VXRP");
 89
 90	return 0;
 91}
 92
 93SND_SOC_DAILINK_DEFS(aif1,
 94	DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")),
 95	DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")),
 96	DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0")));
 97
 98SND_SOC_DAILINK_DEFS(fifo_tx,
 99	DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s-sec")),
100	DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")),
101	DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s-sec")));
102
103static struct snd_soc_dai_link smdk_dai[] = {
104	{ /* Primary DAI i/f */
105		.name = "WM8994 AIF1",
106		.stream_name = "Pri_Dai",
107		.init = smdk_wm8994_init_paiftx,
108		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
109			SND_SOC_DAIFMT_CBP_CFP,
110		.ops = &smdk_ops,
111		SND_SOC_DAILINK_REG(aif1),
112	}, { /* Sec_Fifo Playback i/f */
113		.name = "Sec_FIFO TX",
114		.stream_name = "Sec_Dai",
115		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
116			SND_SOC_DAIFMT_CBP_CFP,
117		.ops = &smdk_ops,
118		SND_SOC_DAILINK_REG(fifo_tx),
119	},
120};
121
122static struct snd_soc_card smdk = {
123	.name = "SMDK-I2S",
124	.owner = THIS_MODULE,
125	.dai_link = smdk_dai,
126	.num_links = ARRAY_SIZE(smdk_dai),
127};
128
129static const struct of_device_id samsung_wm8994_of_match[] = {
130	{ .compatible = "samsung,smdk-wm8994" },
131	{},
132};
133MODULE_DEVICE_TABLE(of, samsung_wm8994_of_match);
134
135static int smdk_audio_probe(struct platform_device *pdev)
136{
137	int ret;
138	struct device_node *np = pdev->dev.of_node;
139	struct snd_soc_card *card = &smdk;
140
141	card->dev = &pdev->dev;
142
143	if (np) {
144		smdk_dai[0].cpus->dai_name = NULL;
145		smdk_dai[0].cpus->of_node = of_parse_phandle(np,
146				"samsung,i2s-controller", 0);
147		if (!smdk_dai[0].cpus->of_node) {
148			dev_err(&pdev->dev,
149			   "Property 'samsung,i2s-controller' missing or invalid\n");
150			ret = -EINVAL;
151			return ret;
152		}
153
154		smdk_dai[0].platforms->name = NULL;
155		smdk_dai[0].platforms->of_node = smdk_dai[0].cpus->of_node;
156	}
157
158	ret = devm_snd_soc_register_card(&pdev->dev, card);
159
160	if (ret)
161		dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n");
162
163	return ret;
164}
165
166static struct platform_driver smdk_audio_driver = {
167	.driver		= {
168		.name	= "smdk-audio-wm8994",
169		.of_match_table = samsung_wm8994_of_match,
170		.pm	= &snd_soc_pm_ops,
171	},
172	.probe		= smdk_audio_probe,
173};
174
175module_platform_driver(smdk_audio_driver);
176
177MODULE_DESCRIPTION("ALSA SoC SMDK WM8994");
178MODULE_LICENSE("GPL");
179MODULE_ALIAS("platform:smdk-audio-wm8994");