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>
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
;
45 switch (params_rate(params
)) {
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
);
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
);
71 /* set the codec system clock for DAC and ADC */
72 ret
= snd_soc_dai_set_sysclk(codec_dai
, WM8750_SYSCLK
, clk
,
77 /* set the I2S system clock as input (unused) */
78 ret
= snd_soc_dai_set_sysclk(cpu_dai
, PXA2XX_I2S_SYSCLK
, 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
[] = {
92 .mask
= SND_JACK_MICROPHONE
,
95 .pin
= "Headphone Jack",
96 .mask
= SND_JACK_HEADPHONE
,
100 .mask
= SND_JACK_HEADPHONE
,
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,
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
;
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
,
170 ret
= snd_soc_jack_add_pins(&hs_jack
, ARRAY_SIZE(hs_jack_pins
),
175 ret
= snd_soc_jack_add_gpios(&hs_jack
, ARRAY_SIZE(hs_jack_gpios
),
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
= {
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
,
202 /* z2 audio machine driver */
203 static struct snd_soc_card snd_soc_z2
= {
209 static struct platform_device
*z2_snd_device
;
211 static int __init
z2_init(void)
215 if (!machine_is_zipit2())
218 z2_snd_device
= platform_device_alloc("soc-audio", -1);
222 platform_set_drvdata(z2_snd_device
, &snd_soc_z2
);
223 ret
= platform_device_add(z2_snd_device
);
226 platform_device_put(z2_snd_device
);
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");