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Linux/sound/soc/samsung/h1940_uda1380.c

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  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/types.h>
 17 #include <linux/gpio.h>
 18 #include <linux/module.h>
 19 
 20 #include <sound/soc.h>
 21 #include <sound/jack.h>
 22 
 23 #include "regs-iis.h"
 24 #include <asm/mach-types.h>
 25 
 26 #include <mach/gpio-samsung.h>
 27 #include "s3c24xx-i2s.h"
 28 
 29 static unsigned int rates[] = {
 30         11025,
 31         22050,
 32         44100,
 33 };
 34 
 35 static struct snd_pcm_hw_constraint_list hw_rates = {
 36         .count = ARRAY_SIZE(rates),
 37         .list = rates,
 38         .mask = 0,
 39 };
 40 
 41 static struct snd_soc_jack hp_jack;
 42 
 43 static struct snd_soc_jack_pin hp_jack_pins[] = {
 44         {
 45                 .pin    = "Headphone Jack",
 46                 .mask   = SND_JACK_HEADPHONE,
 47         },
 48         {
 49                 .pin    = "Speaker",
 50                 .mask   = SND_JACK_HEADPHONE,
 51                 .invert = 1,
 52         },
 53 };
 54 
 55 static struct snd_soc_jack_gpio hp_jack_gpios[] = {
 56         {
 57                 .gpio                   = S3C2410_GPG(4),
 58                 .name                   = "hp-gpio",
 59                 .report                 = SND_JACK_HEADPHONE,
 60                 .invert                 = 1,
 61                 .debounce_time          = 200,
 62         },
 63 };
 64 
 65 static int h1940_startup(struct snd_pcm_substream *substream)
 66 {
 67         struct snd_pcm_runtime *runtime = substream->runtime;
 68 
 69         return snd_pcm_hw_constraint_list(runtime, 0,
 70                                         SNDRV_PCM_HW_PARAM_RATE,
 71                                         &hw_rates);
 72 }
 73 
 74 static int h1940_hw_params(struct snd_pcm_substream *substream,
 75                                 struct snd_pcm_hw_params *params)
 76 {
 77         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 78         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 79         int div;
 80         int ret;
 81         unsigned int rate = params_rate(params);
 82 
 83         switch (rate) {
 84         case 11025:
 85         case 22050:
 86         case 44100:
 87                 div = s3c24xx_i2s_get_clockrate() / (384 * rate);
 88                 if (s3c24xx_i2s_get_clockrate() % (384 * rate) > (192 * rate))
 89                         div++;
 90                 break;
 91         default:
 92                 dev_err(rtd->dev, "%s: rate %d is not supported\n",
 93                         __func__, rate);
 94                 return -EINVAL;
 95         }
 96 
 97         /* select clock source */
 98         ret = snd_soc_dai_set_sysclk(cpu_dai, S3C24XX_CLKSRC_PCLK, rate,
 99                         SND_SOC_CLOCK_OUT);
100         if (ret < 0)
101                 return ret;
102 
103         /* set MCLK division for sample rate */
104         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
105                 S3C2410_IISMOD_384FS);
106         if (ret < 0)
107                 return ret;
108 
109         /* set BCLK division for sample rate */
110         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
111                 S3C2410_IISMOD_32FS);
112         if (ret < 0)
113                 return ret;
114 
115         /* set prescaler division for sample rate */
116         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
117                 S3C24XX_PRESCALE(div, div));
118         if (ret < 0)
119                 return ret;
120 
121         return 0;
122 }
123 
124 static struct snd_soc_ops h1940_ops = {
125         .startup        = h1940_startup,
126         .hw_params      = h1940_hw_params,
127 };
128 
129 static int h1940_spk_power(struct snd_soc_dapm_widget *w,
130                                 struct snd_kcontrol *kcontrol, int event)
131 {
132         if (SND_SOC_DAPM_EVENT_ON(event))
133                 gpio_set_value(S3C_GPIO_END + 9, 1);
134         else
135                 gpio_set_value(S3C_GPIO_END + 9, 0);
136 
137         return 0;
138 }
139 
140 /* h1940 machine dapm widgets */
141 static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
142         SND_SOC_DAPM_HP("Headphone Jack", NULL),
143         SND_SOC_DAPM_MIC("Mic Jack", NULL),
144         SND_SOC_DAPM_SPK("Speaker", h1940_spk_power),
145 };
146 
147 /* h1940 machine audio_map */
148 static const struct snd_soc_dapm_route audio_map[] = {
149         /* headphone connected to VOUTLHP, VOUTRHP */
150         {"Headphone Jack", NULL, "VOUTLHP"},
151         {"Headphone Jack", NULL, "VOUTRHP"},
152 
153         /* ext speaker connected to VOUTL, VOUTR  */
154         {"Speaker", NULL, "VOUTL"},
155         {"Speaker", NULL, "VOUTR"},
156 
157         /* mic is connected to VINM */
158         {"VINM", NULL, "Mic Jack"},
159 };
160 
161 static struct platform_device *s3c24xx_snd_device;
162 
163 static int h1940_uda1380_init(struct snd_soc_pcm_runtime *rtd)
164 {
165         snd_soc_card_jack_new(rtd->card, "Headphone Jack", SND_JACK_HEADPHONE,
166                 &hp_jack, hp_jack_pins, ARRAY_SIZE(hp_jack_pins));
167 
168         snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
169                 hp_jack_gpios);
170 
171         return 0;
172 }
173 
174 static int h1940_uda1380_card_remove(struct snd_soc_card *card)
175 {
176         snd_soc_jack_free_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
177                 hp_jack_gpios);
178 
179         return 0;
180 }
181 
182 /* s3c24xx digital audio interface glue - connects codec <--> CPU */
183 static struct snd_soc_dai_link h1940_uda1380_dai[] = {
184         {
185                 .name           = "uda1380",
186                 .stream_name    = "UDA1380 Duplex",
187                 .cpu_dai_name   = "s3c24xx-iis",
188                 .codec_dai_name = "uda1380-hifi",
189                 .init           = h1940_uda1380_init,
190                 .platform_name  = "s3c24xx-iis",
191                 .codec_name     = "uda1380-codec.0-001a",
192                 .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
193                                   SND_SOC_DAIFMT_CBS_CFS,
194                 .ops            = &h1940_ops,
195         },
196 };
197 
198 static struct snd_soc_card h1940_asoc = {
199         .name = "h1940",
200         .owner = THIS_MODULE,
201         .remove = h1940_uda1380_card_remove,
202         .dai_link = h1940_uda1380_dai,
203         .num_links = ARRAY_SIZE(h1940_uda1380_dai),
204 
205         .dapm_widgets = uda1380_dapm_widgets,
206         .num_dapm_widgets = ARRAY_SIZE(uda1380_dapm_widgets),
207         .dapm_routes = audio_map,
208         .num_dapm_routes = ARRAY_SIZE(audio_map),
209 };
210 
211 static int __init h1940_init(void)
212 {
213         int ret;
214 
215         if (!machine_is_h1940())
216                 return -ENODEV;
217 
218         /* configure some gpios */
219         ret = gpio_request(S3C_GPIO_END + 9, "speaker-power");
220         if (ret)
221                 goto err_out;
222 
223         ret = gpio_direction_output(S3C_GPIO_END + 9, 0);
224         if (ret)
225                 goto err_gpio;
226 
227         s3c24xx_snd_device = platform_device_alloc("soc-audio", -1);
228         if (!s3c24xx_snd_device) {
229                 ret = -ENOMEM;
230                 goto err_gpio;
231         }
232 
233         platform_set_drvdata(s3c24xx_snd_device, &h1940_asoc);
234         ret = platform_device_add(s3c24xx_snd_device);
235 
236         if (ret)
237                 goto err_plat;
238 
239         return 0;
240 
241 err_plat:
242         platform_device_put(s3c24xx_snd_device);
243 err_gpio:
244         gpio_free(S3C_GPIO_END + 9);
245 
246 err_out:
247         return ret;
248 }
249 
250 static void __exit h1940_exit(void)
251 {
252         platform_device_unregister(s3c24xx_snd_device);
253         gpio_free(S3C_GPIO_END + 9);
254 }
255 
256 module_init(h1940_init);
257 module_exit(h1940_exit);
258 
259 /* Module information */
260 MODULE_AUTHOR("Arnaud Patard, Vasily Khoruzhick");
261 MODULE_DESCRIPTION("ALSA SoC H1940");
262 MODULE_LICENSE("GPL");
263 

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