Merge branch 'for-2.6.39' of git://linux-nfs.org/~bfields/linux
[pandora-kernel.git] / sound / soc / samsung / h1940_uda1380.c
1 /*
2  * h1940-uda1380.c  --  ALSA Soc Audio Layer
3  *
4  * Copyright (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
5  * Copyright (c) 2010 Vasily Khoruzhick <anarsoul@gmail.com>
6  *
7  * Based on version from Arnaud Patard <arnaud.patard@rtp-net.org>
8  *
9  * This program is free software; you can redistribute  it and/or modify it
10  * under  the terms of  the GNU General  Public License as published by the
11  * Free Software Foundation;  either version 2 of the  License, or (at your
12  * option) any later version.
13  *
14  */
15
16 #include <linux/gpio.h>
17
18 #include <sound/soc.h>
19 #include <sound/jack.h>
20
21 #include <plat/regs-iis.h>
22 #include <mach/h1940-latch.h>
23 #include <asm/mach-types.h>
24
25 #include "s3c24xx-i2s.h"
26
27 static unsigned int rates[] = {
28         11025,
29         22050,
30         44100,
31 };
32
33 static struct snd_pcm_hw_constraint_list hw_rates = {
34         .count = ARRAY_SIZE(rates),
35         .list = rates,
36         .mask = 0,
37 };
38
39 static struct snd_soc_jack hp_jack;
40
41 static struct snd_soc_jack_pin hp_jack_pins[] = {
42         {
43                 .pin    = "Headphone Jack",
44                 .mask   = SND_JACK_HEADPHONE,
45         },
46         {
47                 .pin    = "Speaker",
48                 .mask   = SND_JACK_HEADPHONE,
49                 .invert = 1,
50         },
51 };
52
53 static struct snd_soc_jack_gpio hp_jack_gpios[] = {
54         {
55                 .gpio                   = S3C2410_GPG(4),
56                 .name                   = "hp-gpio",
57                 .report                 = SND_JACK_HEADPHONE,
58                 .invert                 = 1,
59                 .debounce_time          = 200,
60         },
61 };
62
63 static int h1940_startup(struct snd_pcm_substream *substream)
64 {
65         struct snd_pcm_runtime *runtime = substream->runtime;
66
67         runtime->hw.rate_min = hw_rates.list[0];
68         runtime->hw.rate_max = hw_rates.list[hw_rates.count - 1];
69         runtime->hw.rates = SNDRV_PCM_RATE_KNOT;
70
71         return snd_pcm_hw_constraint_list(runtime, 0,
72                                         SNDRV_PCM_HW_PARAM_RATE,
73                                         &hw_rates);
74 }
75
76 static int h1940_hw_params(struct snd_pcm_substream *substream,
77                                 struct snd_pcm_hw_params *params)
78 {
79         struct snd_soc_pcm_runtime *rtd = substream->private_data;
80         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
81         struct snd_soc_dai *codec_dai = rtd->codec_dai;
82         int div;
83         int ret;
84         unsigned int rate = params_rate(params);
85
86         switch (rate) {
87         case 11025:
88         case 22050:
89         case 44100:
90                 div = s3c24xx_i2s_get_clockrate() / (384 * rate);
91                 if (s3c24xx_i2s_get_clockrate() % (384 * rate) > (192 * rate))
92                         div++;
93                 break;
94         default:
95                 dev_err(&rtd->dev, "%s: rate %d is not supported\n",
96                         __func__, rate);
97                 return -EINVAL;
98         }
99
100         /* set codec DAI configuration */
101         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
102                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
103         if (ret < 0)
104                 return ret;
105
106         /* set cpu DAI configuration */
107         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
108                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
109         if (ret < 0)
110                 return ret;
111
112         /* select clock source */
113         ret = snd_soc_dai_set_sysclk(cpu_dai, S3C24XX_CLKSRC_PCLK, rate,
114                         SND_SOC_CLOCK_OUT);
115         if (ret < 0)
116                 return ret;
117
118         /* set MCLK division for sample rate */
119         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
120                 S3C2410_IISMOD_384FS);
121         if (ret < 0)
122                 return ret;
123
124         /* set BCLK division for sample rate */
125         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
126                 S3C2410_IISMOD_32FS);
127         if (ret < 0)
128                 return ret;
129
130         /* set prescaler division for sample rate */
131         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
132                 S3C24XX_PRESCALE(div, div));
133         if (ret < 0)
134                 return ret;
135
136         return 0;
137 }
138
139 static struct snd_soc_ops h1940_ops = {
140         .startup        = h1940_startup,
141         .hw_params      = h1940_hw_params,
142 };
143
144 static int h1940_spk_power(struct snd_soc_dapm_widget *w,
145                                 struct snd_kcontrol *kcontrol, int event)
146 {
147         if (SND_SOC_DAPM_EVENT_ON(event))
148                 gpio_set_value(H1940_LATCH_AUDIO_POWER, 1);
149         else
150                 gpio_set_value(H1940_LATCH_AUDIO_POWER, 0);
151
152         return 0;
153 }
154
155 /* h1940 machine dapm widgets */
156 static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
157         SND_SOC_DAPM_HP("Headphone Jack", NULL),
158         SND_SOC_DAPM_MIC("Mic Jack", NULL),
159         SND_SOC_DAPM_SPK("Speaker", h1940_spk_power),
160 };
161
162 /* h1940 machine audio_map */
163 static const struct snd_soc_dapm_route audio_map[] = {
164         /* headphone connected to VOUTLHP, VOUTRHP */
165         {"Headphone Jack", NULL, "VOUTLHP"},
166         {"Headphone Jack", NULL, "VOUTRHP"},
167
168         /* ext speaker connected to VOUTL, VOUTR  */
169         {"Speaker", NULL, "VOUTL"},
170         {"Speaker", NULL, "VOUTR"},
171
172         /* mic is connected to VINM */
173         {"VINM", NULL, "Mic Jack"},
174 };
175
176 static struct platform_device *s3c24xx_snd_device;
177
178 static int h1940_uda1380_init(struct snd_soc_pcm_runtime *rtd)
179 {
180         struct snd_soc_codec *codec = rtd->codec;
181         struct snd_soc_dapm_context *dapm = &codec->dapm;
182         int err;
183
184         /* Add h1940 specific widgets */
185         err = snd_soc_dapm_new_controls(dapm, uda1380_dapm_widgets,
186                                   ARRAY_SIZE(uda1380_dapm_widgets));
187         if (err)
188                 return err;
189
190         /* Set up h1940 specific audio path audio_mapnects */
191         err = snd_soc_dapm_add_routes(dapm, audio_map,
192                                       ARRAY_SIZE(audio_map));
193         if (err)
194                 return err;
195
196         snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
197         snd_soc_dapm_enable_pin(dapm, "Speaker");
198         snd_soc_dapm_enable_pin(dapm, "Mic Jack");
199
200         snd_soc_dapm_sync(dapm);
201
202         snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
203                 &hp_jack);
204
205         snd_soc_jack_add_pins(&hp_jack, ARRAY_SIZE(hp_jack_pins),
206                 hp_jack_pins);
207
208         snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
209                 hp_jack_gpios);
210
211         return 0;
212 }
213
214 /* s3c24xx digital audio interface glue - connects codec <--> CPU */
215 static struct snd_soc_dai_link h1940_uda1380_dai[] = {
216         {
217                 .name           = "uda1380",
218                 .stream_name    = "UDA1380 Duplex",
219                 .cpu_dai_name   = "s3c24xx-iis",
220                 .codec_dai_name = "uda1380-hifi",
221                 .init           = h1940_uda1380_init,
222                 .platform_name  = "samsung-audio",
223                 .codec_name     = "uda1380-codec.0-001a",
224                 .ops            = &h1940_ops,
225         },
226 };
227
228 static struct snd_soc_card h1940_asoc = {
229         .name = "h1940",
230         .dai_link = h1940_uda1380_dai,
231         .num_links = ARRAY_SIZE(h1940_uda1380_dai),
232 };
233
234 static int __init h1940_init(void)
235 {
236         int ret;
237
238         if (!machine_is_h1940())
239                 return -ENODEV;
240
241         /* configure some gpios */
242         ret = gpio_request(H1940_LATCH_AUDIO_POWER, "speaker-power");
243         if (ret)
244                 goto err_out;
245
246         ret = gpio_direction_output(H1940_LATCH_AUDIO_POWER, 0);
247         if (ret)
248                 goto err_gpio;
249
250         s3c24xx_snd_device = platform_device_alloc("soc-audio", -1);
251         if (!s3c24xx_snd_device) {
252                 ret = -ENOMEM;
253                 goto err_gpio;
254         }
255
256         platform_set_drvdata(s3c24xx_snd_device, &h1940_asoc);
257         ret = platform_device_add(s3c24xx_snd_device);
258
259         if (ret)
260                 goto err_plat;
261
262         return 0;
263
264 err_plat:
265         platform_device_put(s3c24xx_snd_device);
266 err_gpio:
267         gpio_free(H1940_LATCH_AUDIO_POWER);
268
269 err_out:
270         return ret;
271 }
272
273 static void __exit h1940_exit(void)
274 {
275         platform_device_unregister(s3c24xx_snd_device);
276         snd_soc_jack_free_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
277                 hp_jack_gpios);
278         gpio_free(H1940_LATCH_AUDIO_POWER);
279 }
280
281 module_init(h1940_init);
282 module_exit(h1940_exit);
283
284 /* Module information */
285 MODULE_AUTHOR("Arnaud Patard, Vasily Khoruzhick");
286 MODULE_DESCRIPTION("ALSA SoC H1940");
287 MODULE_LICENSE("GPL");