tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
43static int poodle_jack_func;
44static int poodle_spk_func;
45
46static 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
74static 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 */
85static 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
94static 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
132static struct snd_soc_ops poodle_ops = {
133 .startup = poodle_startup,
134 .hw_params = poodle_hw_params,
135 .shutdown = poodle_shutdown,
136};
137
138static int poodle_get_jack(struct snd_kcontrol *kcontrol,
139 struct snd_ctl_elem_value *ucontrol)
140{
141 ucontrol->value.integer.value[0] = poodle_jack_func;
142 return 0;
143}
144
145static 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.integer.value[0])
151 return 0;
152
153 poodle_jack_func = ucontrol->value.integer.value[0];
154 poodle_ext_control(&card->dapm);
155 return 1;
156}
157
158static int poodle_get_spk(struct snd_kcontrol *kcontrol,
159 struct snd_ctl_elem_value *ucontrol)
160{
161 ucontrol->value.integer.value[0] = poodle_spk_func;
162 return 0;
163}
164
165static 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.integer.value[0])
171 return 0;
172
173 poodle_spk_func = ucontrol->value.integer.value[0];
174 poodle_ext_control(&card->dapm);
175 return 1;
176}
177
178static 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 */
192static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
193SND_SOC_DAPM_HP("Headphone Jack", NULL),
194SND_SOC_DAPM_SPK("Ext Spk", poodle_amp_event),
195SND_SOC_DAPM_MIC("Microphone", NULL),
196};
197
198/* Corgi machine connections to the codec pins */
199static 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
212static const char *jack_function[] = {"Off", "Headphone"};
213static const char *spk_function[] = {"Off", "On"};
214static const struct soc_enum poodle_enum[] = {
215 SOC_ENUM_SINGLE_EXT(2, jack_function),
216 SOC_ENUM_SINGLE_EXT(2, spk_function),
217};
218
219static 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 */
227static 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 */
240static 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
255static 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 = snd_soc_register_card(card);
271 if (ret)
272 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
273 ret);
274 return ret;
275}
276
277static int poodle_remove(struct platform_device *pdev)
278{
279 struct snd_soc_card *card = platform_get_drvdata(pdev);
280
281 snd_soc_unregister_card(card);
282 return 0;
283}
284
285static struct platform_driver poodle_driver = {
286 .driver = {
287 .name = "poodle-audio",
288 .pm = &snd_soc_pm_ops,
289 },
290 .probe = poodle_probe,
291 .remove = poodle_remove,
292};
293
294module_platform_driver(poodle_driver);
295
296/* Module information */
297MODULE_AUTHOR("Richard Purdie");
298MODULE_DESCRIPTION("ALSA SoC Poodle");
299MODULE_LICENSE("GPL");
300MODULE_ALIAS("platform:poodle-audio");