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 #include <linux/of_device.h>
9 
10  /*
11   * Default CFG switch settings to use this driver:
12   *	SMDKV310: CFG5-1000, CFG7-111111
13   */
14 
15  /*
16   * Configure audio route as :-
17   * $ amixer sset 'DAC1' on,on
18   * $ amixer sset 'Right Headphone Mux' 'DAC'
19   * $ amixer sset 'Left Headphone Mux' 'DAC'
20   * $ amixer sset 'DAC1R Mixer AIF1.1' on
21   * $ amixer sset 'DAC1L Mixer AIF1.1' on
22   * $ amixer sset 'IN2L' on
23   * $ amixer sset 'IN2L PGA IN2LN' on
24   * $ amixer sset 'MIXINL IN2L' on
25   * $ amixer sset 'AIF1ADC1L Mixer ADC/DMIC' on
26   * $ amixer sset 'IN2R' on
27   * $ amixer sset 'IN2R PGA IN2RN' on
28   * $ amixer sset 'MIXINR IN2R' on
29   * $ amixer sset 'AIF1ADC1R Mixer ADC/DMIC' on
30   */
31 
32 /* SMDK has a 16.934MHZ crystal attached to WM8994 */
33 #define SMDK_WM8994_FREQ 16934000
34 
35 struct smdk_wm8994_data {
36 	int mclk1_rate;
37 };
38 
39 /* Default SMDKs */
40 static struct smdk_wm8994_data smdk_board_data = {
41 	.mclk1_rate = SMDK_WM8994_FREQ,
42 };
43 
smdk_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)44 static int smdk_hw_params(struct snd_pcm_substream *substream,
45 	struct snd_pcm_hw_params *params)
46 {
47 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
48 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
49 	unsigned int pll_out;
50 	int ret;
51 
52 	/* AIF1CLK should be >=3MHz for optimal performance */
53 	if (params_width(params) == 24)
54 		pll_out = params_rate(params) * 384;
55 	else if (params_rate(params) == 8000 || params_rate(params) == 11025)
56 		pll_out = params_rate(params) * 512;
57 	else
58 		pll_out = params_rate(params) * 256;
59 
60 	ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
61 					SMDK_WM8994_FREQ, pll_out);
62 	if (ret < 0)
63 		return ret;
64 
65 	ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
66 					pll_out, SND_SOC_CLOCK_IN);
67 	if (ret < 0)
68 		return ret;
69 
70 	return 0;
71 }
72 
73 /*
74  * SMDK WM8994 DAI operations.
75  */
76 static const struct snd_soc_ops smdk_ops = {
77 	.hw_params = smdk_hw_params,
78 };
79 
smdk_wm8994_init_paiftx(struct snd_soc_pcm_runtime * rtd)80 static int smdk_wm8994_init_paiftx(struct snd_soc_pcm_runtime *rtd)
81 {
82 	struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
83 
84 	/* Other pins NC */
85 	snd_soc_dapm_nc_pin(dapm, "HPOUT2P");
86 	snd_soc_dapm_nc_pin(dapm, "HPOUT2N");
87 	snd_soc_dapm_nc_pin(dapm, "SPKOUTLN");
88 	snd_soc_dapm_nc_pin(dapm, "SPKOUTLP");
89 	snd_soc_dapm_nc_pin(dapm, "SPKOUTRP");
90 	snd_soc_dapm_nc_pin(dapm, "SPKOUTRN");
91 	snd_soc_dapm_nc_pin(dapm, "LINEOUT1N");
92 	snd_soc_dapm_nc_pin(dapm, "LINEOUT1P");
93 	snd_soc_dapm_nc_pin(dapm, "LINEOUT2N");
94 	snd_soc_dapm_nc_pin(dapm, "LINEOUT2P");
95 	snd_soc_dapm_nc_pin(dapm, "IN1LP");
96 	snd_soc_dapm_nc_pin(dapm, "IN2LP:VXRN");
97 	snd_soc_dapm_nc_pin(dapm, "IN1RP");
98 	snd_soc_dapm_nc_pin(dapm, "IN2RP:VXRP");
99 
100 	return 0;
101 }
102 
103 SND_SOC_DAILINK_DEFS(aif1,
104 	DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")),
105 	DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")),
106 	DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0")));
107 
108 SND_SOC_DAILINK_DEFS(fifo_tx,
109 	DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s-sec")),
110 	DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")),
111 	DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s-sec")));
112 
113 static struct snd_soc_dai_link smdk_dai[] = {
114 	{ /* Primary DAI i/f */
115 		.name = "WM8994 AIF1",
116 		.stream_name = "Pri_Dai",
117 		.init = smdk_wm8994_init_paiftx,
118 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
119 			SND_SOC_DAIFMT_CBM_CFM,
120 		.ops = &smdk_ops,
121 		SND_SOC_DAILINK_REG(aif1),
122 	}, { /* Sec_Fifo Playback i/f */
123 		.name = "Sec_FIFO TX",
124 		.stream_name = "Sec_Dai",
125 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
126 			SND_SOC_DAIFMT_CBM_CFM,
127 		.ops = &smdk_ops,
128 		SND_SOC_DAILINK_REG(fifo_tx),
129 	},
130 };
131 
132 static struct snd_soc_card smdk = {
133 	.name = "SMDK-I2S",
134 	.owner = THIS_MODULE,
135 	.dai_link = smdk_dai,
136 	.num_links = ARRAY_SIZE(smdk_dai),
137 };
138 
139 static const struct of_device_id samsung_wm8994_of_match[] __maybe_unused = {
140 	{ .compatible = "samsung,smdk-wm8994", .data = &smdk_board_data },
141 	{},
142 };
143 MODULE_DEVICE_TABLE(of, samsung_wm8994_of_match);
144 
smdk_audio_probe(struct platform_device * pdev)145 static int smdk_audio_probe(struct platform_device *pdev)
146 {
147 	int ret;
148 	struct device_node *np = pdev->dev.of_node;
149 	struct snd_soc_card *card = &smdk;
150 	struct smdk_wm8994_data *board;
151 	const struct of_device_id *id;
152 
153 	card->dev = &pdev->dev;
154 
155 	board = devm_kzalloc(&pdev->dev, sizeof(*board), GFP_KERNEL);
156 	if (!board)
157 		return -ENOMEM;
158 
159 	if (np) {
160 		smdk_dai[0].cpus->dai_name = NULL;
161 		smdk_dai[0].cpus->of_node = of_parse_phandle(np,
162 				"samsung,i2s-controller", 0);
163 		if (!smdk_dai[0].cpus->of_node) {
164 			dev_err(&pdev->dev,
165 			   "Property 'samsung,i2s-controller' missing or invalid\n");
166 			ret = -EINVAL;
167 			return ret;
168 		}
169 
170 		smdk_dai[0].platforms->name = NULL;
171 		smdk_dai[0].platforms->of_node = smdk_dai[0].cpus->of_node;
172 	}
173 
174 	id = of_match_device(samsung_wm8994_of_match, &pdev->dev);
175 	if (id)
176 		*board = *((struct smdk_wm8994_data *)id->data);
177 
178 	platform_set_drvdata(pdev, board);
179 
180 	ret = devm_snd_soc_register_card(&pdev->dev, card);
181 
182 	if (ret)
183 		dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n");
184 
185 	return ret;
186 }
187 
188 static struct platform_driver smdk_audio_driver = {
189 	.driver		= {
190 		.name	= "smdk-audio-wm8994",
191 		.of_match_table = of_match_ptr(samsung_wm8994_of_match),
192 		.pm	= &snd_soc_pm_ops,
193 	},
194 	.probe		= smdk_audio_probe,
195 };
196 
197 module_platform_driver(smdk_audio_driver);
198 
199 MODULE_DESCRIPTION("ALSA SoC SMDK WM8994");
200 MODULE_LICENSE("GPL");
201 MODULE_ALIAS("platform:smdk-audio-wm8994");
202