1/*
2 * linux/sound/soc/pxa/z2.c
3 *
4 * SoC Audio driver for Aeronix Zipit Z2
5 *
6 * Copyright (C) 2009 Ken McGuire <kenm@desertweyr.com>
7 * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#include <linux/module.h>
15#include <linux/moduleparam.h>
16#include <linux/timer.h>
17#include <linux/interrupt.h>
18#include <linux/platform_device.h>
19#include <linux/gpio.h>
20
21#include <sound/core.h>
22#include <sound/pcm.h>
23#include <sound/soc.h>
24#include <sound/jack.h>
25
26#include <asm/mach-types.h>
27#include <mach/hardware.h>
28#include <mach/audio.h>
29#include <mach/z2.h>
30
31#include "../codecs/wm8750.h"
32#include "pxa2xx-i2s.h"
33
34static struct snd_soc_card snd_soc_z2;
35
36static int z2_hw_params(struct snd_pcm_substream *substream,
37	struct snd_pcm_hw_params *params)
38{
39	struct snd_soc_pcm_runtime *rtd = substream->private_data;
40	struct snd_soc_dai *codec_dai = rtd->codec_dai;
41	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
42	unsigned int clk = 0;
43	int ret = 0;
44
45	switch (params_rate(params)) {
46	case 8000:
47	case 16000:
48	case 48000:
49	case 96000:
50		clk = 12288000;
51		break;
52	case 11025:
53	case 22050:
54	case 44100:
55		clk = 11289600;
56		break;
57	}
58
59	/* set the codec system clock for DAC and ADC */
60	ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
61		SND_SOC_CLOCK_IN);
62	if (ret < 0)
63		return ret;
64
65	/* set the I2S system clock as input (unused) */
66	ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
67		SND_SOC_CLOCK_IN);
68	if (ret < 0)
69		return ret;
70
71	return 0;
72}
73
74static struct snd_soc_jack hs_jack;
75
76/* Headset jack detection DAPM pins */
77static struct snd_soc_jack_pin hs_jack_pins[] = {
78	{
79		.pin	= "Mic Jack",
80		.mask	= SND_JACK_MICROPHONE,
81	},
82	{
83		.pin	= "Headphone Jack",
84		.mask	= SND_JACK_HEADPHONE,
85	},
86	{
87		.pin    = "Ext Spk",
88		.mask   = SND_JACK_HEADPHONE,
89		.invert = 1
90	},
91};
92
93/* Headset jack detection gpios */
94static struct snd_soc_jack_gpio hs_jack_gpios[] = {
95	{
96		.gpio		= GPIO37_ZIPITZ2_HEADSET_DETECT,
97		.name		= "hsdet-gpio",
98		.report		= SND_JACK_HEADSET,
99		.debounce_time	= 200,
100		.invert		= 1,
101	},
102};
103
104/* z2 machine dapm widgets */
105static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
106	SND_SOC_DAPM_HP("Headphone Jack", NULL),
107	SND_SOC_DAPM_MIC("Mic Jack", NULL),
108	SND_SOC_DAPM_SPK("Ext Spk", NULL),
109
110	/* headset is a mic and mono headphone */
111	SND_SOC_DAPM_HP("Headset Jack", NULL),
112};
113
114/* Z2 machine audio_map */
115static const struct snd_soc_dapm_route z2_audio_map[] = {
116
117	/* headphone connected to LOUT1, ROUT1 */
118	{"Headphone Jack", NULL, "LOUT1"},
119	{"Headphone Jack", NULL, "ROUT1"},
120
121	/* ext speaker connected to LOUT2, ROUT2  */
122	{"Ext Spk", NULL , "ROUT2"},
123	{"Ext Spk", NULL , "LOUT2"},
124
125	/* mic is connected to R input 2 - with bias */
126	{"RINPUT2", NULL, "Mic Bias"},
127	{"Mic Bias", NULL, "Mic Jack"},
128};
129
130/*
131 * Logic for a wm8750 as connected on a Z2 Device
132 */
133static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
134{
135	struct snd_soc_codec *codec = rtd->codec;
136	struct snd_soc_dapm_context *dapm = &codec->dapm;
137	int ret;
138
139	/* NC codec pins */
140	snd_soc_dapm_disable_pin(dapm, "LINPUT3");
141	snd_soc_dapm_disable_pin(dapm, "RINPUT3");
142	snd_soc_dapm_disable_pin(dapm, "OUT3");
143	snd_soc_dapm_disable_pin(dapm, "MONO1");
144
145	/* Jack detection API stuff */
146	ret = snd_soc_card_jack_new(rtd->card, "Headset Jack", SND_JACK_HEADSET,
147				    &hs_jack, hs_jack_pins,
148				    ARRAY_SIZE(hs_jack_pins));
149	if (ret)
150		goto err;
151
152	ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
153				hs_jack_gpios);
154	if (ret)
155		goto err;
156
157	return 0;
158
159err:
160	return ret;
161}
162
163static struct snd_soc_ops z2_ops = {
164	.hw_params = z2_hw_params,
165};
166
167/* z2 digital audio interface glue - connects codec <--> CPU */
168static struct snd_soc_dai_link z2_dai = {
169	.name		= "wm8750",
170	.stream_name	= "WM8750",
171	.cpu_dai_name	= "pxa2xx-i2s",
172	.codec_dai_name	= "wm8750-hifi",
173	.platform_name = "pxa-pcm-audio",
174	.codec_name	= "wm8750.0-001b",
175	.init		= z2_wm8750_init,
176	.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
177			  SND_SOC_DAIFMT_CBS_CFS,
178	.ops		= &z2_ops,
179};
180
181/* z2 audio machine driver */
182static struct snd_soc_card snd_soc_z2 = {
183	.name		= "Z2",
184	.owner		= THIS_MODULE,
185	.dai_link	= &z2_dai,
186	.num_links	= 1,
187
188	.dapm_widgets = wm8750_dapm_widgets,
189	.num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
190	.dapm_routes = z2_audio_map,
191	.num_dapm_routes = ARRAY_SIZE(z2_audio_map),
192};
193
194static struct platform_device *z2_snd_device;
195
196static int __init z2_init(void)
197{
198	int ret;
199
200	if (!machine_is_zipit2())
201		return -ENODEV;
202
203	z2_snd_device = platform_device_alloc("soc-audio", -1);
204	if (!z2_snd_device)
205		return -ENOMEM;
206
207	platform_set_drvdata(z2_snd_device, &snd_soc_z2);
208	ret = platform_device_add(z2_snd_device);
209
210	if (ret)
211		platform_device_put(z2_snd_device);
212
213	return ret;
214}
215
216static void __exit z2_exit(void)
217{
218	platform_device_unregister(z2_snd_device);
219}
220
221module_init(z2_init);
222module_exit(z2_exit);
223
224MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, "
225		"Marek Vasut <marek.vasut@gmail.com>");
226MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
227MODULE_LICENSE("GPL");
228