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 <mach/gpio-samsung.h>
28 #include "regs-iis.h"
29 #include <asm/mach-types.h>
30
31 #include "s3c24xx-i2s.h"
32
33 static int rx1950_uda1380_init(struct snd_soc_pcm_runtime *rtd);
34 static int rx1950_uda1380_card_remove(struct snd_soc_card *card);
35 static int rx1950_startup(struct snd_pcm_substream *substream);
36 static int rx1950_hw_params(struct snd_pcm_substream *substream,
37 struct snd_pcm_hw_params *params);
38 static int rx1950_spk_power(struct snd_soc_dapm_widget *w,
39 struct snd_kcontrol *kcontrol, int event);
40
41 static const unsigned int rates[] = {
42 16000,
43 44100,
44 48000,
45 };
46
47 static const struct snd_pcm_hw_constraint_list hw_rates = {
48 .count = ARRAY_SIZE(rates),
49 .list = rates,
50 };
51
52 static struct snd_soc_jack hp_jack;
53
54 static struct snd_soc_jack_pin hp_jack_pins[] = {
55 {
56 .pin = "Headphone Jack",
57 .mask = SND_JACK_HEADPHONE,
58 },
59 {
60 .pin = "Speaker",
61 .mask = SND_JACK_HEADPHONE,
62 .invert = 1,
63 },
64 };
65
66 static struct snd_soc_jack_gpio hp_jack_gpios[] = {
67 [0] = {
68 .gpio = S3C2410_GPG(12),
69 .name = "hp-gpio",
70 .report = SND_JACK_HEADPHONE,
71 .invert = 1,
72 .debounce_time = 200,
73 },
74 };
75
76 static struct snd_soc_ops rx1950_ops = {
77 .startup = rx1950_startup,
78 .hw_params = rx1950_hw_params,
79 };
80
81 /* s3c24xx digital audio interface glue - connects codec <--> CPU */
82 static struct snd_soc_dai_link rx1950_uda1380_dai[] = {
83 {
84 .name = "uda1380",
85 .stream_name = "UDA1380 Duplex",
86 .cpu_dai_name = "s3c24xx-iis",
87 .codec_dai_name = "uda1380-hifi",
88 .init = rx1950_uda1380_init,
89 .platform_name = "s3c24xx-iis",
90 .codec_name = "uda1380-codec.0-001a",
91 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
92 SND_SOC_DAIFMT_CBS_CFS,
93 .ops = &rx1950_ops,
94 },
95 };
96
97 /* rx1950 machine dapm widgets */
98 static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
99 SND_SOC_DAPM_HP("Headphone Jack", NULL),
100 SND_SOC_DAPM_MIC("Mic Jack", NULL),
101 SND_SOC_DAPM_SPK("Speaker", rx1950_spk_power),
102 };
103
104 /* rx1950 machine audio_map */
105 static const struct snd_soc_dapm_route audio_map[] = {
106 /* headphone connected to VOUTLHP, VOUTRHP */
107 {"Headphone Jack", NULL, "VOUTLHP"},
108 {"Headphone Jack", NULL, "VOUTRHP"},
109
110 /* ext speaker connected to VOUTL, VOUTR */
111 {"Speaker", NULL, "VOUTL"},
112 {"Speaker", NULL, "VOUTR"},
113
114 /* mic is connected to VINM */
115 {"VINM", NULL, "Mic Jack"},
116 };
117
118 static struct snd_soc_card rx1950_asoc = {
119 .name = "rx1950",
120 .owner = THIS_MODULE,
121 .remove = rx1950_uda1380_card_remove,
122 .dai_link = rx1950_uda1380_dai,
123 .num_links = ARRAY_SIZE(rx1950_uda1380_dai),
124
125 .dapm_widgets = uda1380_dapm_widgets,
126 .num_dapm_widgets = ARRAY_SIZE(uda1380_dapm_widgets),
127 .dapm_routes = audio_map,
128 .num_dapm_routes = ARRAY_SIZE(audio_map),
129 };
130
131 static struct platform_device *s3c24xx_snd_device;
132
rx1950_startup(struct snd_pcm_substream * substream)133 static int rx1950_startup(struct snd_pcm_substream *substream)
134 {
135 struct snd_pcm_runtime *runtime = substream->runtime;
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 int div;
159 int ret;
160 unsigned int rate = params_rate(params);
161 int clk_source, fs_mode;
162
163 switch (rate) {
164 case 16000:
165 case 48000:
166 clk_source = S3C24XX_CLKSRC_PCLK;
167 fs_mode = S3C2410_IISMOD_256FS;
168 div = s3c24xx_i2s_get_clockrate() / (256 * rate);
169 if (s3c24xx_i2s_get_clockrate() % (256 * rate) > (128 * rate))
170 div++;
171 break;
172 case 44100:
173 case 88200:
174 clk_source = S3C24XX_CLKSRC_MPLL;
175 fs_mode = S3C2410_IISMOD_384FS;
176 div = 1;
177 break;
178 default:
179 printk(KERN_ERR "%s: rate %d is not supported\n",
180 __func__, rate);
181 return -EINVAL;
182 }
183
184 /* select clock source */
185 ret = snd_soc_dai_set_sysclk(cpu_dai, clk_source, rate,
186 SND_SOC_CLOCK_OUT);
187 if (ret < 0)
188 return ret;
189
190 /* set MCLK division for sample rate */
191 ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
192 fs_mode);
193 if (ret < 0)
194 return ret;
195
196 /* set BCLK division for sample rate */
197 ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
198 S3C2410_IISMOD_32FS);
199 if (ret < 0)
200 return ret;
201
202 /* set prescaler division for sample rate */
203 ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
204 S3C24XX_PRESCALE(div, div));
205 if (ret < 0)
206 return ret;
207
208 return 0;
209 }
210
rx1950_uda1380_init(struct snd_soc_pcm_runtime * rtd)211 static int rx1950_uda1380_init(struct snd_soc_pcm_runtime *rtd)
212 {
213 snd_soc_card_jack_new(rtd->card, "Headphone Jack", SND_JACK_HEADPHONE,
214 &hp_jack, hp_jack_pins, ARRAY_SIZE(hp_jack_pins));
215
216 snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
217 hp_jack_gpios);
218
219 return 0;
220 }
221
rx1950_uda1380_card_remove(struct snd_soc_card * card)222 static int rx1950_uda1380_card_remove(struct snd_soc_card *card)
223 {
224 snd_soc_jack_free_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
225 hp_jack_gpios);
226
227 return 0;
228 }
229
rx1950_init(void)230 static int __init rx1950_init(void)
231 {
232 int ret;
233
234 if (!machine_is_rx1950())
235 return -ENODEV;
236
237 /* configure some gpios */
238 ret = gpio_request(S3C2410_GPA(1), "speaker-power");
239 if (ret)
240 goto err_gpio;
241
242 ret = gpio_direction_output(S3C2410_GPA(1), 0);
243 if (ret)
244 goto err_gpio_conf;
245
246 s3c24xx_snd_device = platform_device_alloc("soc-audio", -1);
247 if (!s3c24xx_snd_device) {
248 ret = -ENOMEM;
249 goto err_plat_alloc;
250 }
251
252 platform_set_drvdata(s3c24xx_snd_device, &rx1950_asoc);
253 ret = platform_device_add(s3c24xx_snd_device);
254
255 if (ret) {
256 platform_device_put(s3c24xx_snd_device);
257 goto err_plat_add;
258 }
259
260 return 0;
261
262 err_plat_add:
263 err_plat_alloc:
264 err_gpio_conf:
265 gpio_free(S3C2410_GPA(1));
266
267 err_gpio:
268 return ret;
269 }
270
rx1950_exit(void)271 static void __exit rx1950_exit(void)
272 {
273 platform_device_unregister(s3c24xx_snd_device);
274 gpio_free(S3C2410_GPA(1));
275 }
276
277 module_init(rx1950_init);
278 module_exit(rx1950_exit);
279
280 /* Module information */
281 MODULE_AUTHOR("Vasily Khoruzhick");
282 MODULE_DESCRIPTION("ALSA SoC RX1950");
283 MODULE_LICENSE("GPL");
284