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_dapm_context * dapm)48 static void corgi_ext_control(struct snd_soc_dapm_context *dapm)
49 {
50 snd_soc_dapm_mutex_lock(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_unlocked(dapm, "Mic Jack");
59 snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
60 snd_soc_dapm_enable_pin_unlocked(dapm, "Headphone Jack");
61 snd_soc_dapm_disable_pin_unlocked(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_unlocked(dapm, "Mic Jack");
68 snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
69 snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
70 snd_soc_dapm_disable_pin_unlocked(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_unlocked(dapm, "Mic Jack");
76 snd_soc_dapm_enable_pin_unlocked(dapm, "Line Jack");
77 snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
78 snd_soc_dapm_disable_pin_unlocked(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_unlocked(dapm, "Mic Jack");
84 snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
85 snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
86 snd_soc_dapm_enable_pin_unlocked(dapm, "Headset Jack");
87 break;
88 }
89
90 if (corgi_spk_func == CORGI_SPK_ON)
91 snd_soc_dapm_enable_pin_unlocked(dapm, "Ext Spk");
92 else
93 snd_soc_dapm_disable_pin_unlocked(dapm, "Ext Spk");
94
95 /* signal a DAPM event */
96 snd_soc_dapm_sync_unlocked(dapm);
97
98 snd_soc_dapm_mutex_unlock(dapm);
99 }
100
corgi_startup(struct snd_pcm_substream * substream)101 static int corgi_startup(struct snd_pcm_substream *substream)
102 {
103 struct snd_soc_pcm_runtime *rtd = substream->private_data;
104
105 /* check the jack status at stream startup */
106 corgi_ext_control(&rtd->card->dapm);
107
108 return 0;
109 }
110
111 /* we need to unmute the HP at shutdown as the mute burns power on corgi */
corgi_shutdown(struct snd_pcm_substream * substream)112 static void corgi_shutdown(struct snd_pcm_substream *substream)
113 {
114 /* set = unmute headphone */
115 gpio_set_value(CORGI_GPIO_MUTE_L, 1);
116 gpio_set_value(CORGI_GPIO_MUTE_R, 1);
117 }
118
corgi_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)119 static int corgi_hw_params(struct snd_pcm_substream *substream,
120 struct snd_pcm_hw_params *params)
121 {
122 struct snd_soc_pcm_runtime *rtd = substream->private_data;
123 struct snd_soc_dai *codec_dai = rtd->codec_dai;
124 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
125 unsigned int clk = 0;
126 int ret = 0;
127
128 switch (params_rate(params)) {
129 case 8000:
130 case 16000:
131 case 48000:
132 case 96000:
133 clk = 12288000;
134 break;
135 case 11025:
136 case 22050:
137 case 44100:
138 clk = 11289600;
139 break;
140 }
141
142 /* set the codec system clock for DAC and ADC */
143 ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
144 SND_SOC_CLOCK_IN);
145 if (ret < 0)
146 return ret;
147
148 /* set the I2S system clock as input (unused) */
149 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
150 SND_SOC_CLOCK_IN);
151 if (ret < 0)
152 return ret;
153
154 return 0;
155 }
156
157 static struct snd_soc_ops corgi_ops = {
158 .startup = corgi_startup,
159 .hw_params = corgi_hw_params,
160 .shutdown = corgi_shutdown,
161 };
162
corgi_get_jack(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)163 static int corgi_get_jack(struct snd_kcontrol *kcontrol,
164 struct snd_ctl_elem_value *ucontrol)
165 {
166 ucontrol->value.integer.value[0] = corgi_jack_func;
167 return 0;
168 }
169
corgi_set_jack(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)170 static int corgi_set_jack(struct snd_kcontrol *kcontrol,
171 struct snd_ctl_elem_value *ucontrol)
172 {
173 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
174
175 if (corgi_jack_func == ucontrol->value.integer.value[0])
176 return 0;
177
178 corgi_jack_func = ucontrol->value.integer.value[0];
179 corgi_ext_control(&card->dapm);
180 return 1;
181 }
182
corgi_get_spk(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)183 static int corgi_get_spk(struct snd_kcontrol *kcontrol,
184 struct snd_ctl_elem_value *ucontrol)
185 {
186 ucontrol->value.integer.value[0] = corgi_spk_func;
187 return 0;
188 }
189
corgi_set_spk(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)190 static int corgi_set_spk(struct snd_kcontrol *kcontrol,
191 struct snd_ctl_elem_value *ucontrol)
192 {
193 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
194
195 if (corgi_spk_func == ucontrol->value.integer.value[0])
196 return 0;
197
198 corgi_spk_func = ucontrol->value.integer.value[0];
199 corgi_ext_control(&card->dapm);
200 return 1;
201 }
202
corgi_amp_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)203 static int corgi_amp_event(struct snd_soc_dapm_widget *w,
204 struct snd_kcontrol *k, int event)
205 {
206 gpio_set_value(CORGI_GPIO_APM_ON, SND_SOC_DAPM_EVENT_ON(event));
207 return 0;
208 }
209
corgi_mic_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)210 static int corgi_mic_event(struct snd_soc_dapm_widget *w,
211 struct snd_kcontrol *k, int event)
212 {
213 gpio_set_value(CORGI_GPIO_MIC_BIAS, SND_SOC_DAPM_EVENT_ON(event));
214 return 0;
215 }
216
217 /* corgi machine dapm widgets */
218 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
219 SND_SOC_DAPM_HP("Headphone Jack", NULL),
220 SND_SOC_DAPM_MIC("Mic Jack", corgi_mic_event),
221 SND_SOC_DAPM_SPK("Ext Spk", corgi_amp_event),
222 SND_SOC_DAPM_LINE("Line Jack", NULL),
223 SND_SOC_DAPM_HP("Headset Jack", NULL),
224 };
225
226 /* Corgi machine audio map (connections to the codec pins) */
227 static const struct snd_soc_dapm_route corgi_audio_map[] = {
228
229 /* headset Jack - in = micin, out = LHPOUT*/
230 {"Headset Jack", NULL, "LHPOUT"},
231
232 /* headphone connected to LHPOUT1, RHPOUT1 */
233 {"Headphone Jack", NULL, "LHPOUT"},
234 {"Headphone Jack", NULL, "RHPOUT"},
235
236 /* speaker connected to LOUT, ROUT */
237 {"Ext Spk", NULL, "ROUT"},
238 {"Ext Spk", NULL, "LOUT"},
239
240 /* mic is connected to MICIN (via right channel of headphone jack) */
241 {"MICIN", NULL, "Mic Jack"},
242
243 /* Same as the above but no mic bias for line signals */
244 {"MICIN", NULL, "Line Jack"},
245 };
246
247 static const char *jack_function[] = {"Headphone", "Mic", "Line", "Headset",
248 "Off"};
249 static const char *spk_function[] = {"On", "Off"};
250 static const struct soc_enum corgi_enum[] = {
251 SOC_ENUM_SINGLE_EXT(5, jack_function),
252 SOC_ENUM_SINGLE_EXT(2, spk_function),
253 };
254
255 static const struct snd_kcontrol_new wm8731_corgi_controls[] = {
256 SOC_ENUM_EXT("Jack Function", corgi_enum[0], corgi_get_jack,
257 corgi_set_jack),
258 SOC_ENUM_EXT("Speaker Function", corgi_enum[1], corgi_get_spk,
259 corgi_set_spk),
260 };
261
262 /* corgi digital audio interface glue - connects codec <--> CPU */
263 static struct snd_soc_dai_link corgi_dai = {
264 .name = "WM8731",
265 .stream_name = "WM8731",
266 .cpu_dai_name = "pxa2xx-i2s",
267 .codec_dai_name = "wm8731-hifi",
268 .platform_name = "pxa-pcm-audio",
269 .codec_name = "wm8731.0-001b",
270 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
271 SND_SOC_DAIFMT_CBS_CFS,
272 .ops = &corgi_ops,
273 };
274
275 /* corgi audio machine driver */
276 static struct snd_soc_card corgi = {
277 .name = "Corgi",
278 .owner = THIS_MODULE,
279 .dai_link = &corgi_dai,
280 .num_links = 1,
281
282 .controls = wm8731_corgi_controls,
283 .num_controls = ARRAY_SIZE(wm8731_corgi_controls),
284 .dapm_widgets = wm8731_dapm_widgets,
285 .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
286 .dapm_routes = corgi_audio_map,
287 .num_dapm_routes = ARRAY_SIZE(corgi_audio_map),
288 .fully_routed = true,
289 };
290
corgi_probe(struct platform_device * pdev)291 static int corgi_probe(struct platform_device *pdev)
292 {
293 struct snd_soc_card *card = &corgi;
294 int ret;
295
296 card->dev = &pdev->dev;
297
298 ret = devm_snd_soc_register_card(&pdev->dev, card);
299 if (ret)
300 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
301 ret);
302 return ret;
303 }
304
305 static struct platform_driver corgi_driver = {
306 .driver = {
307 .name = "corgi-audio",
308 .pm = &snd_soc_pm_ops,
309 },
310 .probe = corgi_probe,
311 };
312
313 module_platform_driver(corgi_driver);
314
315 /* Module information */
316 MODULE_AUTHOR("Richard Purdie");
317 MODULE_DESCRIPTION("ALSA SoC Corgi");
318 MODULE_LICENSE("GPL");
319 MODULE_ALIAS("platform:corgi-audio");
320