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),
195};
196
197/* Corgi machine connections to the codec pins */
198static const struct snd_soc_dapm_route poodle_audio_map[] = {
199
200	/* headphone connected to LHPOUT1, RHPOUT1 */
201	{"Headphone Jack", NULL, "LHPOUT"},
202	{"Headphone Jack", NULL, "RHPOUT"},
203
204	/* speaker connected to LOUT, ROUT */
205	{"Ext Spk", NULL, "ROUT"},
206	{"Ext Spk", NULL, "LOUT"},
207};
208
209static const char *jack_function[] = {"Off", "Headphone"};
210static const char *spk_function[] = {"Off", "On"};
211static const struct soc_enum poodle_enum[] = {
212	SOC_ENUM_SINGLE_EXT(2, jack_function),
213	SOC_ENUM_SINGLE_EXT(2, spk_function),
214};
215
216static const struct snd_kcontrol_new wm8731_poodle_controls[] = {
217	SOC_ENUM_EXT("Jack Function", poodle_enum[0], poodle_get_jack,
218		poodle_set_jack),
219	SOC_ENUM_EXT("Speaker Function", poodle_enum[1], poodle_get_spk,
220		poodle_set_spk),
221};
222
223/*
224 * Logic for a wm8731 as connected on a Sharp SL-C7x0 Device
225 */
226static int poodle_wm8731_init(struct snd_soc_pcm_runtime *rtd)
227{
228	struct snd_soc_codec *codec = rtd->codec;
229	struct snd_soc_dapm_context *dapm = &codec->dapm;
230
231	snd_soc_dapm_nc_pin(dapm, "LLINEIN");
232	snd_soc_dapm_nc_pin(dapm, "RLINEIN");
233
234	return 0;
235}
236
237/* poodle digital audio interface glue - connects codec <--> CPU */
238static struct snd_soc_dai_link poodle_dai = {
239	.name = "WM8731",
240	.stream_name = "WM8731",
241	.cpu_dai_name = "pxa2xx-i2s",
242	.codec_dai_name = "wm8731-hifi",
243	.platform_name = "pxa-pcm-audio",
244	.codec_name = "wm8731.0-001b",
245	.init = poodle_wm8731_init,
246	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
247		   SND_SOC_DAIFMT_CBS_CFS,
248	.ops = &poodle_ops,
249};
250
251/* poodle audio machine driver */
252static struct snd_soc_card poodle = {
253	.name = "Poodle",
254	.dai_link = &poodle_dai,
255	.num_links = 1,
256	.owner = THIS_MODULE,
257
258	.controls = wm8731_poodle_controls,
259	.num_controls = ARRAY_SIZE(wm8731_poodle_controls),
260	.dapm_widgets = wm8731_dapm_widgets,
261	.num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
262	.dapm_routes = poodle_audio_map,
263	.num_dapm_routes = ARRAY_SIZE(poodle_audio_map),
264};
265
266static int poodle_probe(struct platform_device *pdev)
267{
268	struct snd_soc_card *card = &poodle;
269	int ret;
270
271	locomo_gpio_set_dir(&poodle_locomo_device.dev,
272		POODLE_LOCOMO_GPIO_AMP_ON, 0);
273	/* should we mute HP at startup - burning power ?*/
274	locomo_gpio_set_dir(&poodle_locomo_device.dev,
275		POODLE_LOCOMO_GPIO_MUTE_L, 0);
276	locomo_gpio_set_dir(&poodle_locomo_device.dev,
277		POODLE_LOCOMO_GPIO_MUTE_R, 0);
278
279	card->dev = &pdev->dev;
280
281	ret = snd_soc_register_card(card);
282	if (ret)
283		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
284			ret);
285	return ret;
286}
287
288static int poodle_remove(struct platform_device *pdev)
289{
290	struct snd_soc_card *card = platform_get_drvdata(pdev);
291
292	snd_soc_unregister_card(card);
293	return 0;
294}
295
296static struct platform_driver poodle_driver = {
297	.driver		= {
298		.name	= "poodle-audio",
299		.pm     = &snd_soc_pm_ops,
300	},
301	.probe		= poodle_probe,
302	.remove		= poodle_remove,
303};
304
305module_platform_driver(poodle_driver);
306
307/* Module information */
308MODULE_AUTHOR("Richard Purdie");
309MODULE_DESCRIPTION("ALSA SoC Poodle");
310MODULE_LICENSE("GPL");
311MODULE_ALIAS("platform:poodle-audio");
312