ASoC: Decouple DAPM from CODECs
[linux-2.6.git] / sound / soc / s3c24xx / smartq_wm8987.c
1 /* sound/soc/s3c24xx/smartq_wm8987.c
2  *
3  * Copyright 2010 Maurus Cuelenaere <mcuelenaere@gmail.com>
4  *
5  * Based on smdk6410_wm8987.c
6  *     Copyright 2007 Wolfson Microelectronics PLC. - linux@wolfsonmicro.com
7  *     Graeme Gregory - graeme.gregory@wolfsonmicro.com
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/module.h>
17 #include <linux/platform_device.h>
18 #include <linux/gpio.h>
19
20 #include <sound/pcm.h>
21 #include <sound/pcm_params.h>
22 #include <sound/soc-dapm.h>
23 #include <sound/jack.h>
24
25 #include <asm/mach-types.h>
26
27 #include "s3c-dma.h"
28 #include "s3c64xx-i2s.h"
29
30 #include "../codecs/wm8750.h"
31
32 /*
33  * WM8987 is register compatible with WM8750, so using that as base driver.
34  */
35
36 static struct snd_soc_card snd_soc_smartq;
37
38 static int smartq_hifi_hw_params(struct snd_pcm_substream *substream,
39         struct snd_pcm_hw_params *params)
40 {
41         struct snd_soc_pcm_runtime *rtd = substream->private_data;
42         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
43         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
44         struct s3c_i2sv2_rate_calc div;
45         unsigned int clk = 0;
46         int ret;
47
48         s3c_i2sv2_iis_calc_rate(&div, NULL, params_rate(params),
49                                 s3c_i2sv2_get_clock(cpu_dai));
50
51         switch (params_rate(params)) {
52         case 8000:
53         case 16000:
54         case 32000:
55         case 48000:
56         case 96000:
57                 clk = 12288000;
58                 break;
59         case 11025:
60         case 22050:
61         case 44100:
62         case 88200:
63                 clk = 11289600;
64                 break;
65         }
66
67         /* set codec DAI configuration */
68         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
69                                              SND_SOC_DAIFMT_NB_NF |
70                                              SND_SOC_DAIFMT_CBS_CFS);
71         if (ret < 0)
72                 return ret;
73
74         /* set cpu DAI configuration */
75         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
76                                            SND_SOC_DAIFMT_NB_NF |
77                                            SND_SOC_DAIFMT_CBS_CFS);
78         if (ret < 0)
79                 return ret;
80
81         /* set the codec system clock for DAC and ADC */
82         ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
83                                      SND_SOC_CLOCK_IN);
84         if (ret < 0)
85                 return ret;
86
87         /* set MCLK division for sample rate */
88         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_RCLK, div.fs_div);
89         if (ret < 0)
90                 return ret;
91
92         /* set prescaler division for sample rate */
93         ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_PRESCALER,
94                                      div.clk_div - 1);
95         if (ret < 0)
96                 return ret;
97
98         return 0;
99 }
100
101 /*
102  * SmartQ WM8987 HiFi DAI operations.
103  */
104 static struct snd_soc_ops smartq_hifi_ops = {
105         .hw_params = smartq_hifi_hw_params,
106 };
107
108 static struct snd_soc_jack smartq_jack;
109
110 static struct snd_soc_jack_pin smartq_jack_pins[] = {
111         /* Disable speaker when headphone is plugged in */
112         {
113                 .pin    = "Internal Speaker",
114                 .mask   = SND_JACK_HEADPHONE,
115         },
116 };
117
118 static struct snd_soc_jack_gpio smartq_jack_gpios[] = {
119         {
120                 .gpio           = S3C64XX_GPL(12),
121                 .name           = "headphone detect",
122                 .report         = SND_JACK_HEADPHONE,
123                 .debounce_time  = 200,
124         },
125 };
126
127 static const struct snd_kcontrol_new wm8987_smartq_controls[] = {
128         SOC_DAPM_PIN_SWITCH("Internal Speaker"),
129         SOC_DAPM_PIN_SWITCH("Headphone Jack"),
130         SOC_DAPM_PIN_SWITCH("Internal Mic"),
131 };
132
133 static int smartq_speaker_event(struct snd_soc_dapm_widget *w,
134                                 struct snd_kcontrol *k,
135                                 int event)
136 {
137         gpio_set_value(S3C64XX_GPK(12), SND_SOC_DAPM_EVENT_OFF(event));
138
139         return 0;
140 }
141
142 static const struct snd_soc_dapm_widget wm8987_dapm_widgets[] = {
143         SND_SOC_DAPM_SPK("Internal Speaker", smartq_speaker_event),
144         SND_SOC_DAPM_HP("Headphone Jack", NULL),
145         SND_SOC_DAPM_MIC("Internal Mic", NULL),
146 };
147
148 static const struct snd_soc_dapm_route audio_map[] = {
149         {"Headphone Jack", NULL, "LOUT2"},
150         {"Headphone Jack", NULL, "ROUT2"},
151
152         {"Internal Speaker", NULL, "LOUT2"},
153         {"Internal Speaker", NULL, "ROUT2"},
154
155         {"Mic Bias", NULL, "Internal Mic"},
156         {"LINPUT2", NULL, "Mic Bias"},
157 };
158
159 static int smartq_wm8987_init(struct snd_soc_codec *codec)
160 {
161         struct snd_soc_dapm_context *dapm = &codec->dapm;
162         int err = 0;
163
164         /* Add SmartQ specific widgets */
165         snd_soc_dapm_new_controls(dapm, wm8987_dapm_widgets,
166                                   ARRAY_SIZE(wm8987_dapm_widgets));
167
168         /* add SmartQ specific controls */
169         err = snd_soc_add_controls(codec, wm8987_smartq_controls,
170                                    ARRAY_SIZE(wm8987_smartq_controls));
171
172         if (err < 0)
173                 return err;
174
175         /* setup SmartQ specific audio path */
176         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
177
178         /* set endpoints to not connected */
179         snd_soc_dapm_nc_pin(dapm, "LINPUT1");
180         snd_soc_dapm_nc_pin(dapm, "RINPUT1");
181         snd_soc_dapm_nc_pin(dapm, "OUT3");
182         snd_soc_dapm_nc_pin(dapm, "ROUT1");
183
184         /* set endpoints to default off mode */
185         snd_soc_dapm_enable_pin(dapm, "Internal Speaker");
186         snd_soc_dapm_enable_pin(dapm, "Internal Mic");
187         snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
188
189         err = snd_soc_dapm_sync(dapm);
190         if (err)
191                 return err;
192
193         /* Headphone jack detection */
194         err = snd_soc_jack_new(&snd_soc_smartq, "Headphone Jack",
195                                SND_JACK_HEADPHONE, &smartq_jack);
196         if (err)
197                 return err;
198
199         err = snd_soc_jack_add_pins(&smartq_jack, ARRAY_SIZE(smartq_jack_pins),
200                                     smartq_jack_pins);
201         if (err)
202                 return err;
203
204         err = snd_soc_jack_add_gpios(&smartq_jack,
205                                      ARRAY_SIZE(smartq_jack_gpios),
206                                      smartq_jack_gpios);
207
208         return err;
209 }
210
211 static struct snd_soc_dai_link smartq_dai[] = {
212         {
213                 .name           = "wm8987",
214                 .stream_name    = "SmartQ Hi-Fi",
215                 .cpu_dai_name   = "s3c64xx-i2s.0",
216                 .codec_dai_name = "wm8750-hifi",
217                 .platform_name  = "s3c24xx-pcm-audio",
218                 .codec_name     = "wm8750-codec.0-0x1a",
219                 .init           = smartq_wm8987_init,
220                 .ops            = &smartq_hifi_ops,
221         },
222 };
223
224 static struct snd_soc_card snd_soc_smartq = {
225         .name = "SmartQ",
226         .dai_link = smartq_dai,
227         .num_links = ARRAY_SIZE(smartq_dai),
228 };
229
230 static struct platform_device *smartq_snd_device;
231
232 static int __init smartq_init(void)
233 {
234         int ret;
235
236         if (!machine_is_smartq7() && !machine_is_smartq5()) {
237                 pr_info("Only SmartQ is supported by this ASoC driver\n");
238                 return -ENODEV;
239         }
240
241         smartq_snd_device = platform_device_alloc("soc-audio", -1);
242         if (!smartq_snd_device)
243                 return -ENOMEM;
244
245         platform_set_drvdata(smartq_snd_device, &snd_soc_smartq);
246
247         ret = platform_device_add(smartq_snd_device);
248         if (ret) {
249                 platform_device_put(smartq_snd_device);
250                 return ret;
251         }
252
253         /* Initialise GPIOs used by amplifiers */
254         ret = gpio_request(S3C64XX_GPK(12), "amplifiers shutdown");
255         if (ret) {
256                 dev_err(&smartq_snd_device->dev, "Failed to register GPK12\n");
257                 goto err_unregister_device;
258         }
259
260         /* Disable amplifiers */
261         ret = gpio_direction_output(S3C64XX_GPK(12), 1);
262         if (ret) {
263                 dev_err(&smartq_snd_device->dev, "Failed to configure GPK12\n");
264                 goto err_free_gpio_amp_shut;
265         }
266
267         return 0;
268
269 err_free_gpio_amp_shut:
270         gpio_free(S3C64XX_GPK(12));
271 err_unregister_device:
272         platform_device_unregister(smartq_snd_device);
273
274         return ret;
275 }
276
277 static void __exit smartq_exit(void)
278 {
279         snd_soc_jack_free_gpios(&smartq_jack, ARRAY_SIZE(smartq_jack_gpios),
280                                 smartq_jack_gpios);
281
282         platform_device_unregister(smartq_snd_device);
283 }
284
285 module_init(smartq_init);
286 module_exit(smartq_exit);
287
288 /* Module information */
289 MODULE_AUTHOR("Maurus Cuelenaere <mcuelenaere@gmail.com>");
290 MODULE_DESCRIPTION("ALSA SoC SmartQ WM8987");
291 MODULE_LICENSE("GPL");