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

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