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 codec DAI configuration */
60	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
61		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
62	if (ret < 0)
63		return ret;
64
65	/* set cpu DAI configuration */
66	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
67		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
68	if (ret < 0)
69		return ret;
70
71	/* set the codec system clock for DAC and ADC */
72	ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
73		SND_SOC_CLOCK_IN);
74	if (ret < 0)
75		return ret;
76
77	/* set the I2S system clock as input (unused) */
78	ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
79		SND_SOC_CLOCK_IN);
80	if (ret < 0)
81		return ret;
82
83	return 0;
84}
85
86static struct snd_soc_jack hs_jack;
87
88/* Headset jack detection DAPM pins */
89static struct snd_soc_jack_pin hs_jack_pins[] = {
90	{
91		.pin	= "Mic Jack",
92		.mask	= SND_JACK_MICROPHONE,
93	},
94	{
95		.pin	= "Headphone Jack",
96		.mask	= SND_JACK_HEADPHONE,
97	},
98	{
99		.pin    = "Ext Spk",
100		.mask   = SND_JACK_HEADPHONE,
101		.invert = 1
102	},
103};
104
105/* Headset jack detection gpios */
106static struct snd_soc_jack_gpio hs_jack_gpios[] = {
107	{
108		.gpio		= GPIO37_ZIPITZ2_HEADSET_DETECT,
109		.name		= "hsdet-gpio",
110		.report		= SND_JACK_HEADSET,
111		.debounce_time	= 200,
112		.invert		= 1,
113	},
114};
115
116/* z2 machine dapm widgets */
117static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
118	SND_SOC_DAPM_HP("Headphone Jack", NULL),
119	SND_SOC_DAPM_MIC("Mic Jack", NULL),
120	SND_SOC_DAPM_SPK("Ext Spk", NULL),
121
122	/* headset is a mic and mono headphone */
123	SND_SOC_DAPM_HP("Headset Jack", NULL),
124};
125
126/* Z2 machine audio_map */
127static const struct snd_soc_dapm_route audio_map[] = {
128
129	/* headphone connected to LOUT1, ROUT1 */
130	{"Headphone Jack", NULL, "LOUT1"},
131	{"Headphone Jack", NULL, "ROUT1"},
132
133	/* ext speaker connected to LOUT2, ROUT2  */
134	{"Ext Spk", NULL , "ROUT2"},
135	{"Ext Spk", NULL , "LOUT2"},
136
137	/* mic is connected to R input 2 - with bias */
138	{"RINPUT2", NULL, "Mic Bias"},
139	{"Mic Bias", NULL, "Mic Jack"},
140};
141
142/*
143 * Logic for a wm8750 as connected on a Z2 Device
144 */
145static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
146{
147	struct snd_soc_codec *codec = rtd->codec;
148	struct snd_soc_dapm_context *dapm = &codec->dapm;
149	int ret;
150
151	/* NC codec pins */
152	snd_soc_dapm_disable_pin(dapm, "LINPUT3");
153	snd_soc_dapm_disable_pin(dapm, "RINPUT3");
154	snd_soc_dapm_disable_pin(dapm, "OUT3");
155	snd_soc_dapm_disable_pin(dapm, "MONO1");
156
157	/* Add z2 specific widgets */
158	snd_soc_dapm_new_controls(dapm, wm8750_dapm_widgets,
159				 ARRAY_SIZE(wm8750_dapm_widgets));
160
161	/* Set up z2 specific audio paths */
162	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
163
164	ret = snd_soc_dapm_sync(dapm);
165	if (ret)
166		goto err;
167
168	/* Jack detection API stuff */
169	ret = snd_soc_jack_new(codec, "Headset Jack", SND_JACK_HEADSET,
170				&hs_jack);
171	if (ret)
172		goto err;
173
174	ret = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pins),
175				hs_jack_pins);
176	if (ret)
177		goto err;
178
179	ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
180				hs_jack_gpios);
181	if (ret)
182		goto err;
183
184	return 0;
185
186err:
187	return ret;
188}
189
190static struct snd_soc_ops z2_ops = {
191	.hw_params = z2_hw_params,
192};
193
194/* z2 digital audio interface glue - connects codec <--> CPU */
195static struct snd_soc_dai_link z2_dai = {
196	.name		= "wm8750",
197	.stream_name	= "WM8750",
198	.cpu_dai_name	= "pxa2xx-i2s",
199	.codec_dai_name	= "wm8750-hifi",
200	.platform_name = "pxa-pcm-audio",
201	.codec_name	= "wm8750-codec.0-001b",
202	.init		= z2_wm8750_init,
203	.ops		= &z2_ops,
204};
205
206/* z2 audio machine driver */
207static struct snd_soc_card snd_soc_z2 = {
208	.name		= "Z2",
209	.dai_link	= &z2_dai,
210	.num_links	= 1,
211};
212
213static struct platform_device *z2_snd_device;
214
215static int __init z2_init(void)
216{
217	int ret;
218
219	if (!machine_is_zipit2())
220		return -ENODEV;
221
222	z2_snd_device = platform_device_alloc("soc-audio", -1);
223	if (!z2_snd_device)
224		return -ENOMEM;
225
226	platform_set_drvdata(z2_snd_device, &snd_soc_z2);
227	ret = platform_device_add(z2_snd_device);
228
229	if (ret)
230		platform_device_put(z2_snd_device);
231
232	return ret;
233}
234
235static void __exit z2_exit(void)
236{
237	platform_device_unregister(z2_snd_device);
238}
239
240module_init(z2_init);
241module_exit(z2_exit);
242
243MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, "
244		"Marek Vasut <marek.vasut@gmail.com>");
245MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
246MODULE_LICENSE("GPL");
247