1 /*
2 * corgi.c -- SoC audio for Corgi
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 *
7 * Authors: Liam Girdwood <lrg@slimlogic.co.uk>
8 * Richard Purdie <richard@openedhand.com>
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 */
15
16 #include <linux/module.h>
17 #include <linux/moduleparam.h>
18 #include <linux/timer.h>
19 #include <linux/i2c.h>
20 #include <linux/interrupt.h>
21 #include <linux/platform_device.h>
22 #include <linux/gpio.h>
23 #include <sound/core.h>
24 #include <sound/pcm.h>
25 #include <sound/soc.h>
26
27 #include <asm/mach-types.h>
28 #include <mach/corgi.h>
29 #include <mach/audio.h>
30
31 #include "../codecs/wm8731.h"
32 #include "pxa2xx-i2s.h"
33
34 #define CORGI_HP 0
35 #define CORGI_MIC 1
36 #define CORGI_LINE 2
37 #define CORGI_HEADSET 3
38 #define CORGI_HP_OFF 4
39 #define CORGI_SPK_ON 0
40 #define CORGI_SPK_OFF 1
41
42 /* audio clock in Hz - rounded from 12.235MHz */
43 #define CORGI_AUDIO_CLOCK 12288000
44
45 static int corgi_jack_func;
46 static int corgi_spk_func;
47
corgi_ext_control(struct snd_soc_codec * codec)48 static void corgi_ext_control(struct snd_soc_codec *codec)
49 {
50 struct snd_soc_dapm_context *dapm = &codec->dapm;
51
52 /* set up jack connection */
53 switch (corgi_jack_func) {
54 case CORGI_HP:
55 /* set = unmute headphone */
56 gpio_set_value(CORGI_GPIO_MUTE_L, 1);
57 gpio_set_value(CORGI_GPIO_MUTE_R, 1);
58 snd_soc_dapm_disable_pin(dapm, "Mic Jack");
59 snd_soc_dapm_disable_pin(dapm, "Line Jack");
60 snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
61 snd_soc_dapm_disable_pin(dapm, "Headset Jack");
62 break;
63 case CORGI_MIC:
64 /* reset = mute headphone */
65 gpio_set_value(CORGI_GPIO_MUTE_L, 0);
66 gpio_set_value(CORGI_GPIO_MUTE_R, 0);
67 snd_soc_dapm_enable_pin(dapm, "Mic Jack");
68 snd_soc_dapm_disable_pin(dapm, "Line Jack");
69 snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
70 snd_soc_dapm_disable_pin(dapm, "Headset Jack");
71 break;
72 case CORGI_LINE:
73 gpio_set_value(CORGI_GPIO_MUTE_L, 0);
74 gpio_set_value(CORGI_GPIO_MUTE_R, 0);
75 snd_soc_dapm_disable_pin(dapm, "Mic Jack");
76 snd_soc_dapm_enable_pin(dapm, "Line Jack");
77 snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
78 snd_soc_dapm_disable_pin(dapm, "Headset Jack");
79 break;
80 case CORGI_HEADSET:
81 gpio_set_value(CORGI_GPIO_MUTE_L, 0);
82 gpio_set_value(CORGI_GPIO_MUTE_R, 1);
83 snd_soc_dapm_enable_pin(dapm, "Mic Jack");
84 snd_soc_dapm_disable_pin(dapm, "Line Jack");
85 snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
86 snd_soc_dapm_enable_pin(dapm, "Headset Jack");
87 break;
88 }
89
90 if (corgi_spk_func == CORGI_SPK_ON)
91 snd_soc_dapm_enable_pin(dapm, "Ext Spk");
92 else
93 snd_soc_dapm_disable_pin(dapm, "Ext Spk");
94
95 /* signal a DAPM event */
96 snd_soc_dapm_sync(dapm);
97 }
98
corgi_startup(struct snd_pcm_substream * substream)99 static int corgi_startup(struct snd_pcm_substream *substream)
100 {
101 struct snd_soc_pcm_runtime *rtd = substream->private_data;
102 struct snd_soc_codec *codec = rtd->codec;
103
104 mutex_lock(&codec->mutex);
105
106 /* check the jack status at stream startup */
107 corgi_ext_control(codec);
108
109 mutex_unlock(&codec->mutex);
110
111 return 0;
112 }
113
114 /* we need to unmute the HP at shutdown as the mute burns power on corgi */
corgi_shutdown(struct snd_pcm_substream * substream)115 static void corgi_shutdown(struct snd_pcm_substream *substream)
116 {
117 /* set = unmute headphone */
118 gpio_set_value(CORGI_GPIO_MUTE_L, 1);
119 gpio_set_value(CORGI_GPIO_MUTE_R, 1);
120 }
121
corgi_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)122 static int corgi_hw_params(struct snd_pcm_substream *substream,
123 struct snd_pcm_hw_params *params)
124 {
125 struct snd_soc_pcm_runtime *rtd = substream->private_data;
126 struct snd_soc_dai *codec_dai = rtd->codec_dai;
127 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
128 unsigned int clk = 0;
129 int ret = 0;
130
131 switch (params_rate(params)) {
132 case 8000:
133 case 16000:
134 case 48000:
135 case 96000:
136 clk = 12288000;
137 break;
138 case 11025:
139 case 22050:
140 case 44100:
141 clk = 11289600;
142 break;
143 }
144
145 /* set the codec system clock for DAC and ADC */
146 ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
147 SND_SOC_CLOCK_IN);
148 if (ret < 0)
149 return ret;
150
151 /* set the I2S system clock as input (unused) */
152 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
153 SND_SOC_CLOCK_IN);
154 if (ret < 0)
155 return ret;
156
157 return 0;
158 }
159
160 static struct snd_soc_ops corgi_ops = {
161 .startup = corgi_startup,
162 .hw_params = corgi_hw_params,
163 .shutdown = corgi_shutdown,
164 };
165
corgi_get_jack(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)166 static int corgi_get_jack(struct snd_kcontrol *kcontrol,
167 struct snd_ctl_elem_value *ucontrol)
168 {
169 ucontrol->value.integer.value[0] = corgi_jack_func;
170 return 0;
171 }
172
corgi_set_jack(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)173 static int corgi_set_jack(struct snd_kcontrol *kcontrol,
174 struct snd_ctl_elem_value *ucontrol)
175 {
176 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
177
178 if (corgi_jack_func == ucontrol->value.integer.value[0])
179 return 0;
180
181 corgi_jack_func = ucontrol->value.integer.value[0];
182 corgi_ext_control(codec);
183 return 1;
184 }
185
corgi_get_spk(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)186 static int corgi_get_spk(struct snd_kcontrol *kcontrol,
187 struct snd_ctl_elem_value *ucontrol)
188 {
189 ucontrol->value.integer.value[0] = corgi_spk_func;
190 return 0;
191 }
192
corgi_set_spk(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)193 static int corgi_set_spk(struct snd_kcontrol *kcontrol,
194 struct snd_ctl_elem_value *ucontrol)
195 {
196 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
197
198 if (corgi_spk_func == ucontrol->value.integer.value[0])
199 return 0;
200
201 corgi_spk_func = ucontrol->value.integer.value[0];
202 corgi_ext_control(codec);
203 return 1;
204 }
205
corgi_amp_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)206 static int corgi_amp_event(struct snd_soc_dapm_widget *w,
207 struct snd_kcontrol *k, int event)
208 {
209 gpio_set_value(CORGI_GPIO_APM_ON, SND_SOC_DAPM_EVENT_ON(event));
210 return 0;
211 }
212
corgi_mic_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)213 static int corgi_mic_event(struct snd_soc_dapm_widget *w,
214 struct snd_kcontrol *k, int event)
215 {
216 gpio_set_value(CORGI_GPIO_MIC_BIAS, SND_SOC_DAPM_EVENT_ON(event));
217 return 0;
218 }
219
220 /* corgi machine dapm widgets */
221 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
222 SND_SOC_DAPM_HP("Headphone Jack", NULL),
223 SND_SOC_DAPM_MIC("Mic Jack", corgi_mic_event),
224 SND_SOC_DAPM_SPK("Ext Spk", corgi_amp_event),
225 SND_SOC_DAPM_LINE("Line Jack", NULL),
226 SND_SOC_DAPM_HP("Headset Jack", NULL),
227 };
228
229 /* Corgi machine audio map (connections to the codec pins) */
230 static const struct snd_soc_dapm_route corgi_audio_map[] = {
231
232 /* headset Jack - in = micin, out = LHPOUT*/
233 {"Headset Jack", NULL, "LHPOUT"},
234
235 /* headphone connected to LHPOUT1, RHPOUT1 */
236 {"Headphone Jack", NULL, "LHPOUT"},
237 {"Headphone Jack", NULL, "RHPOUT"},
238
239 /* speaker connected to LOUT, ROUT */
240 {"Ext Spk", NULL, "ROUT"},
241 {"Ext Spk", NULL, "LOUT"},
242
243 /* mic is connected to MICIN (via right channel of headphone jack) */
244 {"MICIN", NULL, "Mic Jack"},
245
246 /* Same as the above but no mic bias for line signals */
247 {"MICIN", NULL, "Line Jack"},
248 };
249
250 static const char *jack_function[] = {"Headphone", "Mic", "Line", "Headset",
251 "Off"};
252 static const char *spk_function[] = {"On", "Off"};
253 static const struct soc_enum corgi_enum[] = {
254 SOC_ENUM_SINGLE_EXT(5, jack_function),
255 SOC_ENUM_SINGLE_EXT(2, spk_function),
256 };
257
258 static const struct snd_kcontrol_new wm8731_corgi_controls[] = {
259 SOC_ENUM_EXT("Jack Function", corgi_enum[0], corgi_get_jack,
260 corgi_set_jack),
261 SOC_ENUM_EXT("Speaker Function", corgi_enum[1], corgi_get_spk,
262 corgi_set_spk),
263 };
264
265 /*
266 * Logic for a wm8731 as connected on a Sharp SL-C7x0 Device
267 */
corgi_wm8731_init(struct snd_soc_pcm_runtime * rtd)268 static int corgi_wm8731_init(struct snd_soc_pcm_runtime *rtd)
269 {
270 struct snd_soc_codec *codec = rtd->codec;
271 struct snd_soc_dapm_context *dapm = &codec->dapm;
272
273 snd_soc_dapm_nc_pin(dapm, "LLINEIN");
274 snd_soc_dapm_nc_pin(dapm, "RLINEIN");
275
276 return 0;
277 }
278
279 /* corgi digital audio interface glue - connects codec <--> CPU */
280 static struct snd_soc_dai_link corgi_dai = {
281 .name = "WM8731",
282 .stream_name = "WM8731",
283 .cpu_dai_name = "pxa2xx-i2s",
284 .codec_dai_name = "wm8731-hifi",
285 .platform_name = "pxa-pcm-audio",
286 .codec_name = "wm8731.0-001b",
287 .init = corgi_wm8731_init,
288 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
289 SND_SOC_DAIFMT_CBS_CFS,
290 .ops = &corgi_ops,
291 };
292
293 /* corgi audio machine driver */
294 static struct snd_soc_card corgi = {
295 .name = "Corgi",
296 .owner = THIS_MODULE,
297 .dai_link = &corgi_dai,
298 .num_links = 1,
299
300 .controls = wm8731_corgi_controls,
301 .num_controls = ARRAY_SIZE(wm8731_corgi_controls),
302 .dapm_widgets = wm8731_dapm_widgets,
303 .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
304 .dapm_routes = corgi_audio_map,
305 .num_dapm_routes = ARRAY_SIZE(corgi_audio_map),
306 };
307
corgi_probe(struct platform_device * pdev)308 static int __devinit corgi_probe(struct platform_device *pdev)
309 {
310 struct snd_soc_card *card = &corgi;
311 int ret;
312
313 card->dev = &pdev->dev;
314
315 ret = snd_soc_register_card(card);
316 if (ret)
317 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
318 ret);
319 return ret;
320 }
321
corgi_remove(struct platform_device * pdev)322 static int __devexit corgi_remove(struct platform_device *pdev)
323 {
324 struct snd_soc_card *card = platform_get_drvdata(pdev);
325
326 snd_soc_unregister_card(card);
327 return 0;
328 }
329
330 static struct platform_driver corgi_driver = {
331 .driver = {
332 .name = "corgi-audio",
333 .owner = THIS_MODULE,
334 },
335 .probe = corgi_probe,
336 .remove = __devexit_p(corgi_remove),
337 };
338
339 module_platform_driver(corgi_driver);
340
341 /* Module information */
342 MODULE_AUTHOR("Richard Purdie");
343 MODULE_DESCRIPTION("ALSA SoC Corgi");
344 MODULE_LICENSE("GPL");
345 MODULE_ALIAS("platform:corgi-audio");
346