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Marek Vasutd21e0f42010-04-05 06:13:38 +02001/*
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/soc-dapm.h>
25#include <sound/jack.h>
26
27#include <asm/mach-types.h>
28#include <mach/hardware.h>
29#include <mach/audio.h>
30#include <mach/z2.h>
31
32#include "../codecs/wm8750.h"
Marek Vasutd21e0f42010-04-05 06:13:38 +020033#include "pxa2xx-i2s.h"
34
35static struct snd_soc_card snd_soc_z2;
36
37static int z2_hw_params(struct snd_pcm_substream *substream,
38 struct snd_pcm_hw_params *params)
39{
40 struct snd_soc_pcm_runtime *rtd = substream->private_data;
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000041 struct snd_soc_dai *codec_dai = rtd->codec_dai;
42 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
Marek Vasutd21e0f42010-04-05 06:13:38 +020043 unsigned int clk = 0;
44 int ret = 0;
45
46 switch (params_rate(params)) {
47 case 8000:
48 case 16000:
49 case 48000:
50 case 96000:
51 clk = 12288000;
52 break;
53 case 11025:
54 case 22050:
55 case 44100:
56 clk = 11289600;
57 break;
58 }
59
60 /* set codec DAI configuration */
61 ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
62 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
63 if (ret < 0)
64 return ret;
65
66 /* set cpu DAI configuration */
67 ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
68 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
69 if (ret < 0)
70 return ret;
71
72 /* set the codec system clock for DAC and ADC */
73 ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
74 SND_SOC_CLOCK_IN);
75 if (ret < 0)
76 return ret;
77
78 /* set the I2S system clock as input (unused) */
79 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
80 SND_SOC_CLOCK_IN);
81 if (ret < 0)
82 return ret;
83
84 return 0;
85}
86
87static struct snd_soc_jack hs_jack;
88
89/* Headset jack detection DAPM pins */
90static struct snd_soc_jack_pin hs_jack_pins[] = {
91 {
92 .pin = "Mic Jack",
93 .mask = SND_JACK_MICROPHONE,
94 },
95 {
96 .pin = "Headphone Jack",
97 .mask = SND_JACK_HEADPHONE,
98 },
99};
100
101/* Headset jack detection gpios */
102static struct snd_soc_jack_gpio hs_jack_gpios[] = {
103 {
104 .gpio = GPIO37_ZIPITZ2_HEADSET_DETECT,
105 .name = "hsdet-gpio",
106 .report = SND_JACK_HEADSET,
107 .debounce_time = 200,
108 },
109};
110
111/* z2 machine dapm widgets */
112static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
113 SND_SOC_DAPM_HP("Headphone Jack", NULL),
114 SND_SOC_DAPM_MIC("Mic Jack", NULL),
115 SND_SOC_DAPM_SPK("Ext Spk", NULL),
116
117 /* headset is a mic and mono headphone */
118 SND_SOC_DAPM_HP("Headset Jack", NULL),
119};
120
121/* Z2 machine audio_map */
122static const struct snd_soc_dapm_route audio_map[] = {
123
124 /* headphone connected to LOUT1, ROUT1 */
125 {"Headphone Jack", NULL, "LOUT1"},
126 {"Headphone Jack", NULL, "ROUT1"},
127
128 /* ext speaker connected to LOUT2, ROUT2 */
129 {"Ext Spk", NULL , "ROUT2"},
130 {"Ext Spk", NULL , "LOUT2"},
131
132 /* mic is connected to R input 2 - with bias */
133 {"RINPUT2", NULL, "Mic Bias"},
134 {"Mic Bias", NULL, "Mic Jack"},
135};
136
137/*
138 * Logic for a wm8750 as connected on a Z2 Device
139 */
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000140static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
Marek Vasutd21e0f42010-04-05 06:13:38 +0200141{
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000142 struct snd_soc_codec *codec = rtd->codec;
Marek Vasutd21e0f42010-04-05 06:13:38 +0200143 int ret;
144
145 /* NC codec pins */
146 snd_soc_dapm_disable_pin(codec, "LINPUT3");
147 snd_soc_dapm_disable_pin(codec, "RINPUT3");
148 snd_soc_dapm_disable_pin(codec, "OUT3");
149 snd_soc_dapm_disable_pin(codec, "MONO");
150
151 /* Add z2 specific widgets */
152 snd_soc_dapm_new_controls(codec, wm8750_dapm_widgets,
153 ARRAY_SIZE(wm8750_dapm_widgets));
154
155 /* Set up z2 specific audio paths */
156 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
157
158 ret = snd_soc_dapm_sync(codec);
159 if (ret)
160 goto err;
161
162 /* Jack detection API stuff */
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000163 ret = snd_soc_jack_new(codec, "Headset Jack", SND_JACK_HEADSET,
Marek Vasutd21e0f42010-04-05 06:13:38 +0200164 &hs_jack);
165 if (ret)
166 goto err;
167
168 ret = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pins),
169 hs_jack_pins);
170 if (ret)
171 goto err;
172
173 ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
174 hs_jack_gpios);
175 if (ret)
176 goto err;
177
178 return 0;
179
180err:
181 return ret;
182}
183
184static struct snd_soc_ops z2_ops = {
185 .hw_params = z2_hw_params,
186};
187
188/* z2 digital audio interface glue - connects codec <--> CPU */
189static struct snd_soc_dai_link z2_dai = {
190 .name = "wm8750",
191 .stream_name = "WM8750",
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000192 .cpu_dai_name = "pxa-i2s",
193 .codec_dai_name = "wm8750-hifi",
194 .platform_name = "pxa-pcm-audio",
195 .codec_name = "wm8750-codec.0-001a",
Marek Vasutd21e0f42010-04-05 06:13:38 +0200196 .init = z2_wm8750_init,
197 .ops = &z2_ops,
198};
199
200/* z2 audio machine driver */
201static struct snd_soc_card snd_soc_z2 = {
202 .name = "Z2",
Marek Vasutd21e0f42010-04-05 06:13:38 +0200203 .dai_link = &z2_dai,
204 .num_links = 1,
205};
206
Marek Vasutd21e0f42010-04-05 06:13:38 +0200207static struct platform_device *z2_snd_device;
208
209static int __init z2_init(void)
210{
211 int ret;
212
213 if (!machine_is_zipit2())
214 return -ENODEV;
215
216 z2_snd_device = platform_device_alloc("soc-audio", -1);
217 if (!z2_snd_device)
218 return -ENOMEM;
219
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000220 platform_set_drvdata(z2_snd_device, &snd_soc_z2);
Marek Vasutd21e0f42010-04-05 06:13:38 +0200221 ret = platform_device_add(z2_snd_device);
222
223 if (ret)
224 platform_device_put(z2_snd_device);
225
226 return ret;
227}
228
229static void __exit z2_exit(void)
230{
231 platform_device_unregister(z2_snd_device);
232}
233
234module_init(z2_init);
235module_exit(z2_exit);
236
237MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, "
238 "Marek Vasut <marek.vasut@gmail.com>");
239MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
240MODULE_LICENSE("GPL");