palm27x.c revision e91fb9137dd235ab959d7675d0e4104974dad5eb
1/*
2 * linux/sound/soc/pxa/palm27x.c
3 *
4 * SoC Audio driver for Palm T|X, T5 and LifeDrive
5 *
6 * based on tosa.c
7 *
8 * Copyright (C) 2008 Marek Vasut <marek.vasut@gmail.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 */
15
16#include <linux/module.h>
17#include <linux/moduleparam.h>
18#include <linux/device.h>
19#include <linux/gpio.h>
20#include <linux/interrupt.h>
21#include <linux/irq.h>
22
23#include <sound/core.h>
24#include <sound/pcm.h>
25#include <sound/soc.h>
26#include <sound/soc-dapm.h>
27
28#include <asm/mach-types.h>
29#include <mach/audio.h>
30#include <mach/palmasoc.h>
31
32#include "../codecs/wm9712.h"
33#include "pxa2xx-pcm.h"
34#include "pxa2xx-ac97.h"
35
36static int palm27x_jack_func = 1;
37static int palm27x_spk_func = 1;
38static int palm27x_ep_gpio = -1;
39
40static void palm27x_ext_control(struct snd_soc_codec *codec)
41{
42	if (!palm27x_spk_func)
43		snd_soc_dapm_enable_pin(codec, "Speaker");
44	else
45		snd_soc_dapm_disable_pin(codec, "Speaker");
46
47	if (!palm27x_jack_func)
48		snd_soc_dapm_enable_pin(codec, "Headphone Jack");
49	else
50		snd_soc_dapm_disable_pin(codec, "Headphone Jack");
51
52	snd_soc_dapm_sync(codec);
53}
54
55static int palm27x_startup(struct snd_pcm_substream *substream)
56{
57	struct snd_soc_pcm_runtime *rtd = substream->private_data;
58	struct snd_soc_codec *codec = rtd->socdev->card->codec;
59
60	/* check the jack status at stream startup */
61	palm27x_ext_control(codec);
62	return 0;
63}
64
65static struct snd_soc_ops palm27x_ops = {
66	.startup = palm27x_startup,
67};
68
69static irqreturn_t palm27x_interrupt(int irq, void *v)
70{
71	palm27x_spk_func = gpio_get_value(palm27x_ep_gpio);
72	palm27x_jack_func = !palm27x_spk_func;
73	return IRQ_HANDLED;
74}
75
76static int palm27x_get_jack(struct snd_kcontrol *kcontrol,
77	struct snd_ctl_elem_value *ucontrol)
78{
79	ucontrol->value.integer.value[0] = palm27x_jack_func;
80	return 0;
81}
82
83static int palm27x_set_jack(struct snd_kcontrol *kcontrol,
84	struct snd_ctl_elem_value *ucontrol)
85{
86	struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
87
88	if (palm27x_jack_func == ucontrol->value.integer.value[0])
89		return 0;
90
91	palm27x_jack_func = ucontrol->value.integer.value[0];
92	palm27x_ext_control(codec);
93	return 1;
94}
95
96static int palm27x_get_spk(struct snd_kcontrol *kcontrol,
97	struct snd_ctl_elem_value *ucontrol)
98{
99	ucontrol->value.integer.value[0] = palm27x_spk_func;
100	return 0;
101}
102
103static int palm27x_set_spk(struct snd_kcontrol *kcontrol,
104	struct snd_ctl_elem_value *ucontrol)
105{
106	struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
107
108	if (palm27x_spk_func == ucontrol->value.integer.value[0])
109		return 0;
110
111	palm27x_spk_func = ucontrol->value.integer.value[0];
112	palm27x_ext_control(codec);
113	return 1;
114}
115
116/* PalmTX machine dapm widgets */
117static const struct snd_soc_dapm_widget palm27x_dapm_widgets[] = {
118	SND_SOC_DAPM_HP("Headphone Jack", NULL),
119	SND_SOC_DAPM_SPK("Speaker", NULL),
120};
121
122/* PalmTX audio map */
123static const struct snd_soc_dapm_route audio_map[] = {
124	/* headphone connected to HPOUTL, HPOUTR */
125	{"Headphone Jack", NULL, "HPOUTL"},
126	{"Headphone Jack", NULL, "HPOUTR"},
127
128	/* ext speaker connected to ROUT2, LOUT2 */
129	{"Speaker", NULL, "LOUT2"},
130	{"Speaker", NULL, "ROUT2"},
131};
132
133static const char *jack_function[] = {"Headphone", "Off"};
134static const char *spk_function[] = {"On", "Off"};
135static const struct soc_enum palm27x_enum[] = {
136	SOC_ENUM_SINGLE_EXT(2, jack_function),
137	SOC_ENUM_SINGLE_EXT(2, spk_function),
138};
139
140static const struct snd_kcontrol_new palm27x_controls[] = {
141	SOC_ENUM_EXT("Jack Function", palm27x_enum[0], palm27x_get_jack,
142		palm27x_set_jack),
143	SOC_ENUM_EXT("Speaker Function", palm27x_enum[1], palm27x_get_spk,
144		palm27x_set_spk),
145};
146
147static int palm27x_ac97_init(struct snd_soc_codec *codec)
148{
149	int err;
150
151	snd_soc_dapm_nc_pin(codec, "OUT3");
152	snd_soc_dapm_nc_pin(codec, "MONOOUT");
153
154	/* add palm27x specific controls */
155	err = snd_soc_add_controls(codec, palm27x_controls,
156				ARRAY_SIZE(palm27x_controls));
157	if (err < 0)
158		return err;
159
160	/* add palm27x specific widgets */
161	snd_soc_dapm_new_controls(codec, palm27x_dapm_widgets,
162				ARRAY_SIZE(palm27x_dapm_widgets));
163
164	/* set up palm27x specific audio path audio_map */
165	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
166
167	snd_soc_dapm_sync(codec);
168	return 0;
169}
170
171static struct snd_soc_dai_link palm27x_dai[] = {
172{
173	.name = "AC97 HiFi",
174	.stream_name = "AC97 HiFi",
175	.cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_HIFI],
176	.codec_dai = &wm9712_dai[WM9712_DAI_AC97_HIFI],
177	.init = palm27x_ac97_init,
178	.ops = &palm27x_ops,
179},
180{
181	.name = "AC97 Aux",
182	.stream_name = "AC97 Aux",
183	.cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_AUX],
184	.codec_dai = &wm9712_dai[WM9712_DAI_AC97_AUX],
185	.ops = &palm27x_ops,
186},
187};
188
189static struct snd_soc_card palm27x_asoc = {
190	.name = "Palm/PXA27x",
191	.platform = &pxa2xx_soc_platform,
192	.dai_link = palm27x_dai,
193	.num_links = ARRAY_SIZE(palm27x_dai),
194};
195
196static struct snd_soc_device palm27x_snd_devdata = {
197	.card = &palm27x_asoc,
198	.codec_dev = &soc_codec_dev_wm9712,
199};
200
201static struct platform_device *palm27x_snd_device;
202
203static int palm27x_asoc_probe(struct platform_device *pdev)
204{
205	int ret;
206
207	if (!(machine_is_palmtx() || machine_is_palmt5() ||
208		machine_is_palmld()))
209		return -ENODEV;
210
211	if (pdev->dev.platform_data)
212		palm27x_ep_gpio = ((struct palm27x_asoc_info *)
213			(pdev->dev.platform_data))->jack_gpio;
214
215	ret = gpio_request(palm27x_ep_gpio, "Headphone Jack");
216	if (ret)
217		return ret;
218	ret = gpio_direction_input(palm27x_ep_gpio);
219	if (ret)
220		goto err_alloc;
221
222	if (request_irq(gpio_to_irq(palm27x_ep_gpio), palm27x_interrupt,
223			IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
224			"Headphone jack", NULL))
225		goto err_alloc;
226
227	palm27x_snd_device = platform_device_alloc("soc-audio", -1);
228	if (!palm27x_snd_device) {
229		ret = -ENOMEM;
230		goto err_dev;
231	}
232
233	platform_set_drvdata(palm27x_snd_device, &palm27x_snd_devdata);
234	palm27x_snd_devdata.dev = &palm27x_snd_device->dev;
235	ret = platform_device_add(palm27x_snd_device);
236
237	if (ret != 0)
238		goto put_device;
239
240	return 0;
241
242put_device:
243	platform_device_put(palm27x_snd_device);
244err_dev:
245	free_irq(gpio_to_irq(palm27x_ep_gpio), NULL);
246err_alloc:
247	gpio_free(palm27x_ep_gpio);
248
249	return ret;
250}
251
252static int __devexit palm27x_asoc_remove(struct platform_device *pdev)
253{
254	free_irq(gpio_to_irq(palm27x_ep_gpio), NULL);
255	gpio_free(palm27x_ep_gpio);
256	platform_device_unregister(palm27x_snd_device);
257	return 0;
258}
259
260static struct platform_driver palm27x_wm9712_driver = {
261	.probe		= palm27x_asoc_probe,
262	.remove		= __devexit_p(palm27x_asoc_remove),
263	.driver		= {
264		.name		= "palm27x-asoc",
265		.owner		= THIS_MODULE,
266	},
267};
268
269static int __init palm27x_asoc_init(void)
270{
271	return platform_driver_register(&palm27x_wm9712_driver);
272}
273
274static void __exit palm27x_asoc_exit(void)
275{
276	platform_driver_unregister(&palm27x_wm9712_driver);
277}
278
279module_init(palm27x_asoc_init);
280module_exit(palm27x_asoc_exit);
281
282/* Module information */
283MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
284MODULE_DESCRIPTION("ALSA SoC Palm T|X, T5 and LifeDrive");
285MODULE_LICENSE("GPL");
286