1 /*
2 * poodle.c -- SoC audio for Poodle
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
17 #include <linux/module.h>
18 #include <linux/moduleparam.h>
19 #include <linux/timer.h>
20 #include <linux/i2c.h>
21 #include <linux/interrupt.h>
22 #include <linux/platform_device.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 <asm/hardware/locomo.h>
29 #include <mach/poodle.h>
30 #include <mach/audio.h>
31
32 #include "../codecs/wm8731.h"
33 #include "pxa2xx-i2s.h"
34
35 #define POODLE_HP 1
36 #define POODLE_HP_OFF 0
37 #define POODLE_SPK_ON 1
38 #define POODLE_SPK_OFF 0
39
40 /* audio clock in Hz - rounded from 12.235MHz */
41 #define POODLE_AUDIO_CLOCK 12288000
42
43 static int poodle_jack_func;
44 static int poodle_spk_func;
45
poodle_ext_control(struct snd_soc_dapm_context * dapm)46 static void poodle_ext_control(struct snd_soc_dapm_context *dapm)
47 {
48 /* set up jack connection */
49 if (poodle_jack_func == POODLE_HP) {
50 /* set = unmute headphone */
51 locomo_gpio_write(&poodle_locomo_device.dev,
52 POODLE_LOCOMO_GPIO_MUTE_L, 1);
53 locomo_gpio_write(&poodle_locomo_device.dev,
54 POODLE_LOCOMO_GPIO_MUTE_R, 1);
55 snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
56 } else {
57 locomo_gpio_write(&poodle_locomo_device.dev,
58 POODLE_LOCOMO_GPIO_MUTE_L, 0);
59 locomo_gpio_write(&poodle_locomo_device.dev,
60 POODLE_LOCOMO_GPIO_MUTE_R, 0);
61 snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
62 }
63
64 /* set the enpoints to their new connetion states */
65 if (poodle_spk_func == POODLE_SPK_ON)
66 snd_soc_dapm_enable_pin(dapm, "Ext Spk");
67 else
68 snd_soc_dapm_disable_pin(dapm, "Ext Spk");
69
70 /* signal a DAPM event */
71 snd_soc_dapm_sync(dapm);
72 }
73
poodle_startup(struct snd_pcm_substream * substream)74 static int poodle_startup(struct snd_pcm_substream *substream)
75 {
76 struct snd_soc_pcm_runtime *rtd = substream->private_data;
77
78 /* check the jack status at stream startup */
79 poodle_ext_control(&rtd->card->dapm);
80
81 return 0;
82 }
83
84 /* we need to unmute the HP at shutdown as the mute burns power on poodle */
poodle_shutdown(struct snd_pcm_substream * substream)85 static void poodle_shutdown(struct snd_pcm_substream *substream)
86 {
87 /* set = unmute headphone */
88 locomo_gpio_write(&poodle_locomo_device.dev,
89 POODLE_LOCOMO_GPIO_MUTE_L, 1);
90 locomo_gpio_write(&poodle_locomo_device.dev,
91 POODLE_LOCOMO_GPIO_MUTE_R, 1);
92 }
93
poodle_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)94 static int poodle_hw_params(struct snd_pcm_substream *substream,
95 struct snd_pcm_hw_params *params)
96 {
97 struct snd_soc_pcm_runtime *rtd = substream->private_data;
98 struct snd_soc_dai *codec_dai = rtd->codec_dai;
99 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
100 unsigned int clk = 0;
101 int ret = 0;
102
103 switch (params_rate(params)) {
104 case 8000:
105 case 16000:
106 case 48000:
107 case 96000:
108 clk = 12288000;
109 break;
110 case 11025:
111 case 22050:
112 case 44100:
113 clk = 11289600;
114 break;
115 }
116
117 /* set the codec system clock for DAC and ADC */
118 ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
119 SND_SOC_CLOCK_IN);
120 if (ret < 0)
121 return ret;
122
123 /* set the I2S system clock as input (unused) */
124 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
125 SND_SOC_CLOCK_IN);
126 if (ret < 0)
127 return ret;
128
129 return 0;
130 }
131
132 static const struct snd_soc_ops poodle_ops = {
133 .startup = poodle_startup,
134 .hw_params = poodle_hw_params,
135 .shutdown = poodle_shutdown,
136 };
137
poodle_get_jack(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)138 static int poodle_get_jack(struct snd_kcontrol *kcontrol,
139 struct snd_ctl_elem_value *ucontrol)
140 {
141 ucontrol->value.enumerated.item[0] = poodle_jack_func;
142 return 0;
143 }
144
poodle_set_jack(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)145 static int poodle_set_jack(struct snd_kcontrol *kcontrol,
146 struct snd_ctl_elem_value *ucontrol)
147 {
148 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
149
150 if (poodle_jack_func == ucontrol->value.enumerated.item[0])
151 return 0;
152
153 poodle_jack_func = ucontrol->value.enumerated.item[0];
154 poodle_ext_control(&card->dapm);
155 return 1;
156 }
157
poodle_get_spk(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)158 static int poodle_get_spk(struct snd_kcontrol *kcontrol,
159 struct snd_ctl_elem_value *ucontrol)
160 {
161 ucontrol->value.enumerated.item[0] = poodle_spk_func;
162 return 0;
163 }
164
poodle_set_spk(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)165 static int poodle_set_spk(struct snd_kcontrol *kcontrol,
166 struct snd_ctl_elem_value *ucontrol)
167 {
168 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
169
170 if (poodle_spk_func == ucontrol->value.enumerated.item[0])
171 return 0;
172
173 poodle_spk_func = ucontrol->value.enumerated.item[0];
174 poodle_ext_control(&card->dapm);
175 return 1;
176 }
177
poodle_amp_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)178 static int poodle_amp_event(struct snd_soc_dapm_widget *w,
179 struct snd_kcontrol *k, int event)
180 {
181 if (SND_SOC_DAPM_EVENT_ON(event))
182 locomo_gpio_write(&poodle_locomo_device.dev,
183 POODLE_LOCOMO_GPIO_AMP_ON, 0);
184 else
185 locomo_gpio_write(&poodle_locomo_device.dev,
186 POODLE_LOCOMO_GPIO_AMP_ON, 1);
187
188 return 0;
189 }
190
191 /* poodle machine dapm widgets */
192 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
193 SND_SOC_DAPM_HP("Headphone Jack", NULL),
194 SND_SOC_DAPM_SPK("Ext Spk", poodle_amp_event),
195 SND_SOC_DAPM_MIC("Microphone", NULL),
196 };
197
198 /* Corgi machine connections to the codec pins */
199 static const struct snd_soc_dapm_route poodle_audio_map[] = {
200
201 /* headphone connected to LHPOUT1, RHPOUT1 */
202 {"Headphone Jack", NULL, "LHPOUT"},
203 {"Headphone Jack", NULL, "RHPOUT"},
204
205 /* speaker connected to LOUT, ROUT */
206 {"Ext Spk", NULL, "ROUT"},
207 {"Ext Spk", NULL, "LOUT"},
208
209 {"MICIN", NULL, "Microphone"},
210 };
211
212 static const char * const jack_function[] = {"Off", "Headphone"};
213 static const char * const spk_function[] = {"Off", "On"};
214 static const struct soc_enum poodle_enum[] = {
215 SOC_ENUM_SINGLE_EXT(2, jack_function),
216 SOC_ENUM_SINGLE_EXT(2, spk_function),
217 };
218
219 static const struct snd_kcontrol_new wm8731_poodle_controls[] = {
220 SOC_ENUM_EXT("Jack Function", poodle_enum[0], poodle_get_jack,
221 poodle_set_jack),
222 SOC_ENUM_EXT("Speaker Function", poodle_enum[1], poodle_get_spk,
223 poodle_set_spk),
224 };
225
226 /* poodle digital audio interface glue - connects codec <--> CPU */
227 static struct snd_soc_dai_link poodle_dai = {
228 .name = "WM8731",
229 .stream_name = "WM8731",
230 .cpu_dai_name = "pxa2xx-i2s",
231 .codec_dai_name = "wm8731-hifi",
232 .platform_name = "pxa-pcm-audio",
233 .codec_name = "wm8731.0-001b",
234 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
235 SND_SOC_DAIFMT_CBS_CFS,
236 .ops = &poodle_ops,
237 };
238
239 /* poodle audio machine driver */
240 static struct snd_soc_card poodle = {
241 .name = "Poodle",
242 .dai_link = &poodle_dai,
243 .num_links = 1,
244 .owner = THIS_MODULE,
245
246 .controls = wm8731_poodle_controls,
247 .num_controls = ARRAY_SIZE(wm8731_poodle_controls),
248 .dapm_widgets = wm8731_dapm_widgets,
249 .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
250 .dapm_routes = poodle_audio_map,
251 .num_dapm_routes = ARRAY_SIZE(poodle_audio_map),
252 .fully_routed = true,
253 };
254
poodle_probe(struct platform_device * pdev)255 static int poodle_probe(struct platform_device *pdev)
256 {
257 struct snd_soc_card *card = &poodle;
258 int ret;
259
260 locomo_gpio_set_dir(&poodle_locomo_device.dev,
261 POODLE_LOCOMO_GPIO_AMP_ON, 0);
262 /* should we mute HP at startup - burning power ?*/
263 locomo_gpio_set_dir(&poodle_locomo_device.dev,
264 POODLE_LOCOMO_GPIO_MUTE_L, 0);
265 locomo_gpio_set_dir(&poodle_locomo_device.dev,
266 POODLE_LOCOMO_GPIO_MUTE_R, 0);
267
268 card->dev = &pdev->dev;
269
270 ret = devm_snd_soc_register_card(&pdev->dev, card);
271 if (ret)
272 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
273 ret);
274 return ret;
275 }
276
277 static struct platform_driver poodle_driver = {
278 .driver = {
279 .name = "poodle-audio",
280 .pm = &snd_soc_pm_ops,
281 },
282 .probe = poodle_probe,
283 };
284
285 module_platform_driver(poodle_driver);
286
287 /* Module information */
288 MODULE_AUTHOR("Richard Purdie");
289 MODULE_DESCRIPTION("ALSA SoC Poodle");
290 MODULE_LICENSE("GPL");
291 MODULE_ALIAS("platform:poodle-audio");
292
