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1 /*
2  * rx1950.c  --  ALSA Soc Audio Layer
3  *
4  * Copyright (c) 2010 Vasily Khoruzhick <anarsoul@gmail.com>
5  *
6  * Based on smdk2440.c and magician.c
7  *
8  * Authors: Graeme Gregory graeme.gregory@wolfsonmicro.com
9  *          Philipp Zabel <philipp.zabel@gmail.com>
10  *          Denis Grigoriev <dgreenday@gmail.com>
11  *          Vasily Khoruzhick <anarsoul@gmail.com>
12  *
13  *  This program is free software; you can redistribute  it and/or modify it
14  *  under  the terms of  the GNU General  Public License as published by the
15  *  Free Software Foundation;  either version 2 of the  License, or (at your
16  *  option) any later version.
17  *
18  */
19 
20 #include <linux/types.h>
21 #include <linux/gpio.h>
22 #include <linux/module.h>
23 
24 #include <sound/soc.h>
25 #include <sound/jack.h>
26 
27 #include "regs-iis.h"
28 #include <asm/mach-types.h>
29 
30 #include "s3c24xx-i2s.h"
31 
32 static int rx1950_uda1380_init(struct snd_soc_pcm_runtime *rtd);
33 static int rx1950_startup(struct snd_pcm_substream *substream);
34 static int rx1950_hw_params(struct snd_pcm_substream *substream,
35 				struct snd_pcm_hw_params *params);
36 static int rx1950_spk_power(struct snd_soc_dapm_widget *w,
37 				struct snd_kcontrol *kcontrol, int event);
38 
39 static unsigned int rates[] = {
40 	16000,
41 	44100,
42 	48000,
43 };
44 
45 static struct snd_pcm_hw_constraint_list hw_rates = {
46 	.count = ARRAY_SIZE(rates),
47 	.list = rates,
48 	.mask = 0,
49 };
50 
51 static struct snd_soc_jack hp_jack;
52 
53 static struct snd_soc_jack_pin hp_jack_pins[] = {
54 	{
55 		.pin	= "Headphone Jack",
56 		.mask	= SND_JACK_HEADPHONE,
57 	},
58 	{
59 		.pin	= "Speaker",
60 		.mask	= SND_JACK_HEADPHONE,
61 		.invert	= 1,
62 	},
63 };
64 
65 static struct snd_soc_jack_gpio hp_jack_gpios[] = {
66 	[0] = {
67 		.gpio			= S3C2410_GPG(12),
68 		.name			= "hp-gpio",
69 		.report			= SND_JACK_HEADPHONE,
70 		.invert			= 1,
71 		.debounce_time		= 200,
72 	},
73 };
74 
75 static struct snd_soc_ops rx1950_ops = {
76 	.startup	= rx1950_startup,
77 	.hw_params	= rx1950_hw_params,
78 };
79 
80 /* s3c24xx digital audio interface glue - connects codec <--> CPU */
81 static struct snd_soc_dai_link rx1950_uda1380_dai[] = {
82 	{
83 		.name		= "uda1380",
84 		.stream_name	= "UDA1380 Duplex",
85 		.cpu_dai_name	= "s3c24xx-iis",
86 		.codec_dai_name	= "uda1380-hifi",
87 		.init		= rx1950_uda1380_init,
88 		.platform_name	= "s3c24xx-iis",
89 		.codec_name	= "uda1380-codec.0-001a",
90 		.ops		= &rx1950_ops,
91 	},
92 };
93 
94 /* rx1950 machine dapm widgets */
95 static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
96 	SND_SOC_DAPM_HP("Headphone Jack", NULL),
97 	SND_SOC_DAPM_MIC("Mic Jack", NULL),
98 	SND_SOC_DAPM_SPK("Speaker", rx1950_spk_power),
99 };
100 
101 /* rx1950 machine audio_map */
102 static const struct snd_soc_dapm_route audio_map[] = {
103 	/* headphone connected to VOUTLHP, VOUTRHP */
104 	{"Headphone Jack", NULL, "VOUTLHP"},
105 	{"Headphone Jack", NULL, "VOUTRHP"},
106 
107 	/* ext speaker connected to VOUTL, VOUTR  */
108 	{"Speaker", NULL, "VOUTL"},
109 	{"Speaker", NULL, "VOUTR"},
110 
111 	/* mic is connected to VINM */
112 	{"VINM", NULL, "Mic Jack"},
113 };
114 
115 static struct snd_soc_card rx1950_asoc = {
116 	.name = "rx1950",
117 	.owner = THIS_MODULE,
118 	.dai_link = rx1950_uda1380_dai,
119 	.num_links = ARRAY_SIZE(rx1950_uda1380_dai),
120 
121 	.dapm_widgets = uda1380_dapm_widgets,
122 	.num_dapm_widgets = ARRAY_SIZE(uda1380_dapm_widgets),
123 	.dapm_routes = audio_map,
124 	.num_dapm_routes = ARRAY_SIZE(audio_map),
125 };
126 
127 static struct platform_device *s3c24xx_snd_device;
128 
rx1950_startup(struct snd_pcm_substream * substream)129 static int rx1950_startup(struct snd_pcm_substream *substream)
130 {
131 	struct snd_pcm_runtime *runtime = substream->runtime;
132 
133 	runtime->hw.rate_min = hw_rates.list[0];
134 	runtime->hw.rate_max = hw_rates.list[hw_rates.count - 1];
135 	runtime->hw.rates = SNDRV_PCM_RATE_KNOT;
136 
137 	return snd_pcm_hw_constraint_list(runtime, 0,
138 					SNDRV_PCM_HW_PARAM_RATE,
139 					&hw_rates);
140 }
141 
rx1950_spk_power(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)142 static int rx1950_spk_power(struct snd_soc_dapm_widget *w,
143 				struct snd_kcontrol *kcontrol, int event)
144 {
145 	if (SND_SOC_DAPM_EVENT_ON(event))
146 		gpio_set_value(S3C2410_GPA(1), 1);
147 	else
148 		gpio_set_value(S3C2410_GPA(1), 0);
149 
150 	return 0;
151 }
152 
rx1950_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)153 static int rx1950_hw_params(struct snd_pcm_substream *substream,
154 				struct snd_pcm_hw_params *params)
155 {
156 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
157 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
158 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
159 	int div;
160 	int ret;
161 	unsigned int rate = params_rate(params);
162 	int clk_source, fs_mode;
163 
164 	switch (rate) {
165 	case 16000:
166 	case 48000:
167 		clk_source = S3C24XX_CLKSRC_PCLK;
168 		fs_mode = S3C2410_IISMOD_256FS;
169 		div = s3c24xx_i2s_get_clockrate() / (256 * rate);
170 		if (s3c24xx_i2s_get_clockrate() % (256 * rate) > (128 * rate))
171 			div++;
172 		break;
173 	case 44100:
174 	case 88200:
175 		clk_source = S3C24XX_CLKSRC_MPLL;
176 		fs_mode = S3C2410_IISMOD_384FS;
177 		div = 1;
178 		break;
179 	default:
180 		printk(KERN_ERR "%s: rate %d is not supported\n",
181 			__func__, rate);
182 		return -EINVAL;
183 	}
184 
185 	/* set codec DAI configuration */
186 	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
187 		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
188 	if (ret < 0)
189 		return ret;
190 
191 	/* set cpu DAI configuration */
192 	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
193 		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
194 	if (ret < 0)
195 		return ret;
196 
197 	/* select clock source */
198 	ret = snd_soc_dai_set_sysclk(cpu_dai, clk_source, rate,
199 			SND_SOC_CLOCK_OUT);
200 	if (ret < 0)
201 		return ret;
202 
203 	/* set MCLK division for sample rate */
204 	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
205 		fs_mode);
206 	if (ret < 0)
207 		return ret;
208 
209 	/* set BCLK division for sample rate */
210 	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
211 		S3C2410_IISMOD_32FS);
212 	if (ret < 0)
213 		return ret;
214 
215 	/* set prescaler division for sample rate */
216 	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
217 		S3C24XX_PRESCALE(div, div));
218 	if (ret < 0)
219 		return ret;
220 
221 	return 0;
222 }
223 
rx1950_uda1380_init(struct snd_soc_pcm_runtime * rtd)224 static int rx1950_uda1380_init(struct snd_soc_pcm_runtime *rtd)
225 {
226 	struct snd_soc_codec *codec = rtd->codec;
227 	struct snd_soc_dapm_context *dapm = &codec->dapm;
228 	int err;
229 
230 	snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
231 	snd_soc_dapm_enable_pin(dapm, "Speaker");
232 	snd_soc_dapm_enable_pin(dapm, "Mic Jack");
233 
234 	snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
235 		&hp_jack);
236 
237 	snd_soc_jack_add_pins(&hp_jack, ARRAY_SIZE(hp_jack_pins),
238 		hp_jack_pins);
239 
240 	snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
241 		hp_jack_gpios);
242 
243 	return 0;
244 }
245 
rx1950_init(void)246 static int __init rx1950_init(void)
247 {
248 	int ret;
249 
250 	if (!machine_is_rx1950())
251 		return -ENODEV;
252 
253 	/* configure some gpios */
254 	ret = gpio_request(S3C2410_GPA(1), "speaker-power");
255 	if (ret)
256 		goto err_gpio;
257 
258 	ret = gpio_direction_output(S3C2410_GPA(1), 0);
259 	if (ret)
260 		goto err_gpio_conf;
261 
262 	s3c24xx_snd_device = platform_device_alloc("soc-audio", -1);
263 	if (!s3c24xx_snd_device) {
264 		ret = -ENOMEM;
265 		goto err_plat_alloc;
266 	}
267 
268 	platform_set_drvdata(s3c24xx_snd_device, &rx1950_asoc);
269 	ret = platform_device_add(s3c24xx_snd_device);
270 
271 	if (ret) {
272 		platform_device_put(s3c24xx_snd_device);
273 		goto err_plat_add;
274 	}
275 
276 	return 0;
277 
278 err_plat_add:
279 err_plat_alloc:
280 err_gpio_conf:
281 	gpio_free(S3C2410_GPA(1));
282 
283 err_gpio:
284 	return ret;
285 }
286 
rx1950_exit(void)287 static void __exit rx1950_exit(void)
288 {
289 	platform_device_unregister(s3c24xx_snd_device);
290 	snd_soc_jack_free_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
291 		hp_jack_gpios);
292 	gpio_free(S3C2410_GPA(1));
293 }
294 
295 module_init(rx1950_init);
296 module_exit(rx1950_exit);
297 
298 /* Module information */
299 MODULE_AUTHOR("Vasily Khoruzhick");
300 MODULE_DESCRIPTION("ALSA SoC RX1950");
301 MODULE_LICENSE("GPL");
302