I2C: Add helper macro for i2c_driver boilerplate
[zen-stable.git] / sound / soc / pxa / z2.c
blobb311ffe04b71f6a0a1e87bd7470f0b50a422ecd3
1 /*
2 * linux/sound/soc/pxa/z2.c
4 * SoC Audio driver for Aeronix Zipit Z2
6 * Copyright (C) 2009 Ken McGuire <kenm@desertweyr.com>
7 * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
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.
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>
21 #include <sound/core.h>
22 #include <sound/pcm.h>
23 #include <sound/soc.h>
24 #include <sound/jack.h>
26 #include <asm/mach-types.h>
27 #include <mach/hardware.h>
28 #include <mach/audio.h>
29 #include <mach/z2.h>
31 #include "../codecs/wm8750.h"
32 #include "pxa2xx-i2s.h"
34 static struct snd_soc_card snd_soc_z2;
36 static int z2_hw_params(struct snd_pcm_substream *substream,
37 struct snd_pcm_hw_params *params)
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;
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;
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;
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;
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;
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;
83 return 0;
86 static struct snd_soc_jack hs_jack;
88 /* Headset jack detection DAPM pins */
89 static struct snd_soc_jack_pin hs_jack_pins[] = {
91 .pin = "Mic Jack",
92 .mask = SND_JACK_MICROPHONE,
95 .pin = "Headphone Jack",
96 .mask = SND_JACK_HEADPHONE,
99 .pin = "Ext Spk",
100 .mask = SND_JACK_HEADPHONE,
101 .invert = 1
105 /* Headset jack detection gpios */
106 static struct snd_soc_jack_gpio hs_jack_gpios[] = {
108 .gpio = GPIO37_ZIPITZ2_HEADSET_DETECT,
109 .name = "hsdet-gpio",
110 .report = SND_JACK_HEADSET,
111 .debounce_time = 200,
112 .invert = 1,
116 /* z2 machine dapm widgets */
117 static 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),
122 /* headset is a mic and mono headphone */
123 SND_SOC_DAPM_HP("Headset Jack", NULL),
126 /* Z2 machine audio_map */
127 static const struct snd_soc_dapm_route audio_map[] = {
129 /* headphone connected to LOUT1, ROUT1 */
130 {"Headphone Jack", NULL, "LOUT1"},
131 {"Headphone Jack", NULL, "ROUT1"},
133 /* ext speaker connected to LOUT2, ROUT2 */
134 {"Ext Spk", NULL , "ROUT2"},
135 {"Ext Spk", NULL , "LOUT2"},
137 /* mic is connected to R input 2 - with bias */
138 {"RINPUT2", NULL, "Mic Bias"},
139 {"Mic Bias", NULL, "Mic Jack"},
143 * Logic for a wm8750 as connected on a Z2 Device
145 static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
147 struct snd_soc_codec *codec = rtd->codec;
148 struct snd_soc_dapm_context *dapm = &codec->dapm;
149 int ret;
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");
157 /* Add z2 specific widgets */
158 snd_soc_dapm_new_controls(dapm, wm8750_dapm_widgets,
159 ARRAY_SIZE(wm8750_dapm_widgets));
161 /* Set up z2 specific audio paths */
162 snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
164 /* Jack detection API stuff */
165 ret = snd_soc_jack_new(codec, "Headset Jack", SND_JACK_HEADSET,
166 &hs_jack);
167 if (ret)
168 goto err;
170 ret = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pins),
171 hs_jack_pins);
172 if (ret)
173 goto err;
175 ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
176 hs_jack_gpios);
177 if (ret)
178 goto err;
180 return 0;
182 err:
183 return ret;
186 static struct snd_soc_ops z2_ops = {
187 .hw_params = z2_hw_params,
190 /* z2 digital audio interface glue - connects codec <--> CPU */
191 static struct snd_soc_dai_link z2_dai = {
192 .name = "wm8750",
193 .stream_name = "WM8750",
194 .cpu_dai_name = "pxa2xx-i2s",
195 .codec_dai_name = "wm8750-hifi",
196 .platform_name = "pxa-pcm-audio",
197 .codec_name = "wm8750.0-001b",
198 .init = z2_wm8750_init,
199 .ops = &z2_ops,
202 /* z2 audio machine driver */
203 static struct snd_soc_card snd_soc_z2 = {
204 .name = "Z2",
205 .dai_link = &z2_dai,
206 .num_links = 1,
209 static struct platform_device *z2_snd_device;
211 static int __init z2_init(void)
213 int ret;
215 if (!machine_is_zipit2())
216 return -ENODEV;
218 z2_snd_device = platform_device_alloc("soc-audio", -1);
219 if (!z2_snd_device)
220 return -ENOMEM;
222 platform_set_drvdata(z2_snd_device, &snd_soc_z2);
223 ret = platform_device_add(z2_snd_device);
225 if (ret)
226 platform_device_put(z2_snd_device);
228 return ret;
231 static void __exit z2_exit(void)
233 platform_device_unregister(z2_snd_device);
236 module_init(z2_init);
237 module_exit(z2_exit);
239 MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, "
240 "Marek Vasut <marek.vasut@gmail.com>");
241 MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
242 MODULE_LICENSE("GPL");