2 * linux/sound/soc/pxa/z2.c
4 * SoC Audio driver for Aeronix Zipit Z2
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 the codec system clock for DAC and ADC */
60 ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
65 /* set the I2S system clock as input (unused) */
66 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
74 static struct snd_soc_jack hs_jack;
76 /* Headset jack detection DAPM pins */
77 static struct snd_soc_jack_pin hs_jack_pins[] = {
80 .mask = SND_JACK_MICROPHONE,
83 .pin = "Headphone Jack",
84 .mask = SND_JACK_HEADPHONE,
88 .mask = SND_JACK_HEADPHONE,
93 /* Headset jack detection gpios */
94 static struct snd_soc_jack_gpio hs_jack_gpios[] = {
96 .gpio = GPIO37_ZIPITZ2_HEADSET_DETECT,
98 .report = SND_JACK_HEADSET,
104 /* z2 machine dapm widgets */
105 static 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),
110 /* headset is a mic and mono headphone */
111 SND_SOC_DAPM_HP("Headset Jack", NULL),
114 /* Z2 machine audio_map */
115 static const struct snd_soc_dapm_route z2_audio_map[] = {
117 /* headphone connected to LOUT1, ROUT1 */
118 {"Headphone Jack", NULL, "LOUT1"},
119 {"Headphone Jack", NULL, "ROUT1"},
121 /* ext speaker connected to LOUT2, ROUT2 */
122 {"Ext Spk", NULL , "ROUT2"},
123 {"Ext Spk", NULL , "LOUT2"},
125 /* mic is connected to R input 2 - with bias */
126 {"RINPUT2", NULL, "Mic Bias"},
127 {"Mic Bias", NULL, "Mic Jack"},
131 * Logic for a wm8750 as connected on a Z2 Device
133 static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
137 /* Jack detection API stuff */
138 ret = snd_soc_card_jack_new(rtd->card, "Headset Jack", SND_JACK_HEADSET,
139 &hs_jack, hs_jack_pins,
140 ARRAY_SIZE(hs_jack_pins));
144 ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
155 static struct snd_soc_ops z2_ops = {
156 .hw_params = z2_hw_params,
159 /* z2 digital audio interface glue - connects codec <--> CPU */
160 static struct snd_soc_dai_link z2_dai = {
162 .stream_name = "WM8750",
163 .cpu_dai_name = "pxa2xx-i2s",
164 .codec_dai_name = "wm8750-hifi",
165 .platform_name = "pxa-pcm-audio",
166 .codec_name = "wm8750.0-001b",
167 .init = z2_wm8750_init,
168 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
169 SND_SOC_DAIFMT_CBS_CFS,
173 /* z2 audio machine driver */
174 static struct snd_soc_card snd_soc_z2 = {
176 .owner = THIS_MODULE,
180 .dapm_widgets = wm8750_dapm_widgets,
181 .num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
182 .dapm_routes = z2_audio_map,
183 .num_dapm_routes = ARRAY_SIZE(z2_audio_map),
184 .fully_routed = true,
187 static struct platform_device *z2_snd_device;
189 static int __init z2_init(void)
193 if (!machine_is_zipit2())
196 z2_snd_device = platform_device_alloc("soc-audio", -1);
200 platform_set_drvdata(z2_snd_device, &snd_soc_z2);
201 ret = platform_device_add(z2_snd_device);
204 platform_device_put(z2_snd_device);
209 static void __exit z2_exit(void)
211 platform_device_unregister(z2_snd_device);
214 module_init(z2_init);
215 module_exit(z2_exit);
219 MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
220 MODULE_LICENSE("GPL");