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Linux/sound/soc/samsung/rx1950_uda1380.c

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  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 "regs-iis.h"
 28 #include <asm/mach-types.h>
 29 
 30 #include "s3c24xx-i2s.h"
 31 
 32 static int rx1950_uda1380_init(struct snd_soc_pcm_runtime *rtd);
 33 static int rx1950_startup(struct snd_pcm_substream *substream);
 34 static int rx1950_hw_params(struct snd_pcm_substream *substream,
 35                                 struct snd_pcm_hw_params *params);
 36 static int rx1950_spk_power(struct snd_soc_dapm_widget *w,
 37                                 struct snd_kcontrol *kcontrol, int event);
 38 
 39 static unsigned int rates[] = {
 40         16000,
 41         44100,
 42         48000,
 43 };
 44 
 45 static struct snd_pcm_hw_constraint_list hw_rates = {
 46         .count = ARRAY_SIZE(rates),
 47         .list = rates,
 48         .mask = 0,
 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                 .ops            = &rx1950_ops,
 91         },
 92 };
 93 
 94 /* rx1950 machine dapm widgets */
 95 static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
 96         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 97         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 98         SND_SOC_DAPM_SPK("Speaker", rx1950_spk_power),
 99 };
100 
101 /* rx1950 machine audio_map */
102 static const struct snd_soc_dapm_route audio_map[] = {
103         /* headphone connected to VOUTLHP, VOUTRHP */
104         {"Headphone Jack", NULL, "VOUTLHP"},
105         {"Headphone Jack", NULL, "VOUTRHP"},
106 
107         /* ext speaker connected to VOUTL, VOUTR  */
108         {"Speaker", NULL, "VOUTL"},
109         {"Speaker", NULL, "VOUTR"},
110 
111         /* mic is connected to VINM */
112         {"VINM", NULL, "Mic Jack"},
113 };
114 
115 static struct snd_soc_card rx1950_asoc = {
116         .name = "rx1950",
117         .owner = THIS_MODULE,
118         .dai_link = rx1950_uda1380_dai,
119         .num_links = ARRAY_SIZE(rx1950_uda1380_dai),
120 
121         .dapm_widgets = uda1380_dapm_widgets,
122         .num_dapm_widgets = ARRAY_SIZE(uda1380_dapm_widgets),
123         .dapm_routes = audio_map,
124         .num_dapm_routes = ARRAY_SIZE(audio_map),
125 };
126 
127 static struct platform_device *s3c24xx_snd_device;
128 
129 static int rx1950_startup(struct snd_pcm_substream *substream)
130 {
131         struct snd_pcm_runtime *runtime = substream->runtime;
132 
133         runtime->hw.rate_min = hw_rates.list[0];
134         runtime->hw.rate_max = hw_rates.list[hw_rates.count - 1];
135         runtime->hw.rates = SNDRV_PCM_RATE_KNOT;
136 
137         return snd_pcm_hw_constraint_list(runtime, 0,
138                                         SNDRV_PCM_HW_PARAM_RATE,
139                                         &hw_rates);
140 }
141 
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 
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         struct snd_soc_dai *codec_dai = rtd->codec_dai;
159         int div;
160         int ret;
161         unsigned int rate = params_rate(params);
162         int clk_source, fs_mode;
163 
164         switch (rate) {
165         case 16000:
166         case 48000:
167                 clk_source = S3C24XX_CLKSRC_PCLK;
168                 fs_mode = S3C2410_IISMOD_256FS;
169                 div = s3c24xx_i2s_get_clockrate() / (256 * rate);
170                 if (s3c24xx_i2s_get_clockrate() % (256 * rate) > (128 * rate))
171                         div++;
172                 break;
173         case 44100:
174         case 88200:
175                 clk_source = S3C24XX_CLKSRC_MPLL;
176                 fs_mode = S3C2410_IISMOD_384FS;
177                 div = 1;
178                 break;
179         default:
180                 printk(KERN_ERR "%s: rate %d is not supported\n",
181                         __func__, rate);
182                 return -EINVAL;
183         }
184 
185         /* set codec DAI configuration */
186         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
187                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
188         if (ret < 0)
189                 return ret;
190 
191         /* set cpu DAI configuration */
192         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
193                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
194         if (ret < 0)
195                 return ret;
196 
197         /* select clock source */
198         ret = snd_soc_dai_set_sysclk(cpu_dai, clk_source, rate,
199                         SND_SOC_CLOCK_OUT);
200         if (ret < 0)
201                 return ret;
202 
203         /* set MCLK division for sample rate */
204         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
205                 fs_mode);
206         if (ret < 0)
207                 return ret;
208 
209         /* set BCLK division for sample rate */
210         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
211                 S3C2410_IISMOD_32FS);
212         if (ret < 0)
213                 return ret;
214 
215         /* set prescaler division for sample rate */
216         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
217                 S3C24XX_PRESCALE(div, div));
218         if (ret < 0)
219                 return ret;
220 
221         return 0;
222 }
223 
224 static int rx1950_uda1380_init(struct snd_soc_pcm_runtime *rtd)
225 {
226         struct snd_soc_codec *codec = rtd->codec;
227         struct snd_soc_dapm_context *dapm = &codec->dapm;
228         int err;
229 
230         snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
231         snd_soc_dapm_enable_pin(dapm, "Speaker");
232         snd_soc_dapm_enable_pin(dapm, "Mic Jack");
233 
234         snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
235                 &hp_jack);
236 
237         snd_soc_jack_add_pins(&hp_jack, ARRAY_SIZE(hp_jack_pins),
238                 hp_jack_pins);
239 
240         snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
241                 hp_jack_gpios);
242 
243         return 0;
244 }
245 
246 static int __init rx1950_init(void)
247 {
248         int ret;
249 
250         if (!machine_is_rx1950())
251                 return -ENODEV;
252 
253         /* configure some gpios */
254         ret = gpio_request(S3C2410_GPA(1), "speaker-power");
255         if (ret)
256                 goto err_gpio;
257 
258         ret = gpio_direction_output(S3C2410_GPA(1), 0);
259         if (ret)
260                 goto err_gpio_conf;
261 
262         s3c24xx_snd_device = platform_device_alloc("soc-audio", -1);
263         if (!s3c24xx_snd_device) {
264                 ret = -ENOMEM;
265                 goto err_plat_alloc;
266         }
267 
268         platform_set_drvdata(s3c24xx_snd_device, &rx1950_asoc);
269         ret = platform_device_add(s3c24xx_snd_device);
270 
271         if (ret) {
272                 platform_device_put(s3c24xx_snd_device);
273                 goto err_plat_add;
274         }
275 
276         return 0;
277 
278 err_plat_add:
279 err_plat_alloc:
280 err_gpio_conf:
281         gpio_free(S3C2410_GPA(1));
282 
283 err_gpio:
284         return ret;
285 }
286 
287 static void __exit rx1950_exit(void)
288 {
289         platform_device_unregister(s3c24xx_snd_device);
290         snd_soc_jack_free_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
291                 hp_jack_gpios);
292         gpio_free(S3C2410_GPA(1));
293 }
294 
295 module_init(rx1950_init);
296 module_exit(rx1950_exit);
297 
298 /* Module information */
299 MODULE_AUTHOR("Vasily Khoruzhick");
300 MODULE_DESCRIPTION("ALSA SoC RX1950");
301 MODULE_LICENSE("GPL");
302 

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