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
45static int corgi_jack_func;
46static int corgi_spk_func;
47
48static 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
101static 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 */
112static 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
119static 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
157static struct snd_soc_ops corgi_ops = {
158	.startup = corgi_startup,
159	.hw_params = corgi_hw_params,
160	.shutdown = corgi_shutdown,
161};
162
163static 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
170static 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
183static 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
190static 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
203static 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
210static 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 */
218static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
219SND_SOC_DAPM_HP("Headphone Jack", NULL),
220SND_SOC_DAPM_MIC("Mic Jack", corgi_mic_event),
221SND_SOC_DAPM_SPK("Ext Spk", corgi_amp_event),
222SND_SOC_DAPM_LINE("Line Jack", NULL),
223SND_SOC_DAPM_HP("Headset Jack", NULL),
224};
225
226/* Corgi machine audio map (connections to the codec pins) */
227static 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
247static const char *jack_function[] = {"Headphone", "Mic", "Line", "Headset",
248	"Off"};
249static const char *spk_function[] = {"On", "Off"};
250static const struct soc_enum corgi_enum[] = {
251	SOC_ENUM_SINGLE_EXT(5, jack_function),
252	SOC_ENUM_SINGLE_EXT(2, spk_function),
253};
254
255static 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 */
263static 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 */
276static 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
291static 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 = snd_soc_register_card(card);
299	if (ret)
300		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
301			ret);
302	return ret;
303}
304
305static int corgi_remove(struct platform_device *pdev)
306{
307	struct snd_soc_card *card = platform_get_drvdata(pdev);
308
309	snd_soc_unregister_card(card);
310	return 0;
311}
312
313static struct platform_driver corgi_driver = {
314	.driver		= {
315		.name	= "corgi-audio",
316		.pm     = &snd_soc_pm_ops,
317	},
318	.probe		= corgi_probe,
319	.remove		= corgi_remove,
320};
321
322module_platform_driver(corgi_driver);
323
324/* Module information */
325MODULE_AUTHOR("Richard Purdie");
326MODULE_DESCRIPTION("ALSA SoC Corgi");
327MODULE_LICENSE("GPL");
328MODULE_ALIAS("platform:corgi-audio");
329