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_startup(struct snd_pcm_substream *substream);
35 static int rx1950_hw_params(struct snd_pcm_substream *substream,
36 struct snd_pcm_hw_params *params);
37 static int rx1950_spk_power(struct snd_soc_dapm_widget *w,
38 struct snd_kcontrol *kcontrol, int event);
39
40 static const unsigned int rates[] = {
41 16000,
42 44100,
43 48000,
44 };
45
46 static const struct snd_pcm_hw_constraint_list hw_rates = {
47 .count = ARRAY_SIZE(rates),
48 .list = rates,
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 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
91 SND_SOC_DAIFMT_CBS_CFS,
92 .ops = &rx1950_ops,
93 },
94 };
95
96 /* rx1950 machine dapm widgets */
97 static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
98 SND_SOC_DAPM_HP("Headphone Jack", NULL),
99 SND_SOC_DAPM_MIC("Mic Jack", NULL),
100 SND_SOC_DAPM_SPK("Speaker", rx1950_spk_power),
101 };
102
103 /* rx1950 machine audio_map */
104 static const struct snd_soc_dapm_route audio_map[] = {
105 /* headphone connected to VOUTLHP, VOUTRHP */
106 {"Headphone Jack", NULL, "VOUTLHP"},
107 {"Headphone Jack", NULL, "VOUTRHP"},
108
109 /* ext speaker connected to VOUTL, VOUTR */
110 {"Speaker", NULL, "VOUTL"},
111 {"Speaker", NULL, "VOUTR"},
112
113 /* mic is connected to VINM */
114 {"VINM", NULL, "Mic Jack"},
115 };
116
117 static struct snd_soc_card rx1950_asoc = {
118 .name = "rx1950",
119 .owner = THIS_MODULE,
120 .dai_link = rx1950_uda1380_dai,
121 .num_links = ARRAY_SIZE(rx1950_uda1380_dai),
122
123 .dapm_widgets = uda1380_dapm_widgets,
124 .num_dapm_widgets = ARRAY_SIZE(uda1380_dapm_widgets),
125 .dapm_routes = audio_map,
126 .num_dapm_routes = ARRAY_SIZE(audio_map),
127 };
128
129 static struct platform_device *s3c24xx_snd_device;
130
rx1950_startup(struct snd_pcm_substream * substream)131 static int rx1950_startup(struct snd_pcm_substream *substream)
132 {
133 struct snd_pcm_runtime *runtime = substream->runtime;
134
135 return snd_pcm_hw_constraint_list(runtime, 0,
136 SNDRV_PCM_HW_PARAM_RATE,
137 &hw_rates);
138 }
139
rx1950_spk_power(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)140 static int rx1950_spk_power(struct snd_soc_dapm_widget *w,
141 struct snd_kcontrol *kcontrol, int event)
142 {
143 if (SND_SOC_DAPM_EVENT_ON(event))
144 gpio_set_value(S3C2410_GPA(1), 1);
145 else
146 gpio_set_value(S3C2410_GPA(1), 0);
147
148 return 0;
149 }
150
rx1950_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)151 static int rx1950_hw_params(struct snd_pcm_substream *substream,
152 struct snd_pcm_hw_params *params)
153 {
154 struct snd_soc_pcm_runtime *rtd = substream->private_data;
155 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
156 int div;
157 int ret;
158 unsigned int rate = params_rate(params);
159 int clk_source, fs_mode;
160
161 switch (rate) {
162 case 16000:
163 case 48000:
164 clk_source = S3C24XX_CLKSRC_PCLK;
165 fs_mode = S3C2410_IISMOD_256FS;
166 div = s3c24xx_i2s_get_clockrate() / (256 * rate);
167 if (s3c24xx_i2s_get_clockrate() % (256 * rate) > (128 * rate))
168 div++;
169 break;
170 case 44100:
171 case 88200:
172 clk_source = S3C24XX_CLKSRC_MPLL;
173 fs_mode = S3C2410_IISMOD_384FS;
174 div = 1;
175 break;
176 default:
177 printk(KERN_ERR "%s: rate %d is not supported\n",
178 __func__, rate);
179 return -EINVAL;
180 }
181
182 /* select clock source */
183 ret = snd_soc_dai_set_sysclk(cpu_dai, clk_source, rate,
184 SND_SOC_CLOCK_OUT);
185 if (ret < 0)
186 return ret;
187
188 /* set MCLK division for sample rate */
189 ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
190 fs_mode);
191 if (ret < 0)
192 return ret;
193
194 /* set BCLK division for sample rate */
195 ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
196 S3C2410_IISMOD_32FS);
197 if (ret < 0)
198 return ret;
199
200 /* set prescaler division for sample rate */
201 ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
202 S3C24XX_PRESCALE(div, div));
203 if (ret < 0)
204 return ret;
205
206 return 0;
207 }
208
rx1950_uda1380_init(struct snd_soc_pcm_runtime * rtd)209 static int rx1950_uda1380_init(struct snd_soc_pcm_runtime *rtd)
210 {
211 snd_soc_card_jack_new(rtd->card, "Headphone Jack", SND_JACK_HEADPHONE,
212 &hp_jack, hp_jack_pins, ARRAY_SIZE(hp_jack_pins));
213
214 snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
215 hp_jack_gpios);
216
217 return 0;
218 }
219
rx1950_init(void)220 static int __init rx1950_init(void)
221 {
222 int ret;
223
224 if (!machine_is_rx1950())
225 return -ENODEV;
226
227 /* configure some gpios */
228 ret = gpio_request(S3C2410_GPA(1), "speaker-power");
229 if (ret)
230 goto err_gpio;
231
232 ret = gpio_direction_output(S3C2410_GPA(1), 0);
233 if (ret)
234 goto err_gpio_conf;
235
236 s3c24xx_snd_device = platform_device_alloc("soc-audio", -1);
237 if (!s3c24xx_snd_device) {
238 ret = -ENOMEM;
239 goto err_plat_alloc;
240 }
241
242 platform_set_drvdata(s3c24xx_snd_device, &rx1950_asoc);
243 ret = platform_device_add(s3c24xx_snd_device);
244
245 if (ret) {
246 platform_device_put(s3c24xx_snd_device);
247 goto err_plat_add;
248 }
249
250 return 0;
251
252 err_plat_add:
253 err_plat_alloc:
254 err_gpio_conf:
255 gpio_free(S3C2410_GPA(1));
256
257 err_gpio:
258 return ret;
259 }
260
rx1950_exit(void)261 static void __exit rx1950_exit(void)
262 {
263 platform_device_unregister(s3c24xx_snd_device);
264 gpio_free(S3C2410_GPA(1));
265 }
266
267 module_init(rx1950_init);
268 module_exit(rx1950_exit);
269
270 /* Module information */
271 MODULE_AUTHOR("Vasily Khoruzhick");
272 MODULE_DESCRIPTION("ALSA SoC RX1950");
273 MODULE_LICENSE("GPL");
274
