2 * SoC audio for HP iPAQ hx4700
4 * Copyright (c) 2009 Philipp Zabel
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
13 #include <linux/module.h>
14 #include <linux/timer.h>
15 #include <linux/interrupt.h>
16 #include <linux/platform_device.h>
17 #include <linux/delay.h>
18 #include <linux/gpio.h>
20 #include <sound/core.h>
21 #include <sound/jack.h>
22 #include <sound/pcm.h>
23 #include <sound/pcm_params.h>
24 #include <sound/soc.h>
26 #include <mach/hx4700.h>
27 #include <asm/mach-types.h>
28 #include "pxa2xx-i2s.h"
30 #include "../codecs/ak4641.h"
32 static struct snd_soc_jack hs_jack;
34 /* Headphones jack detection DAPM pin */
35 static struct snd_soc_jack_pin hs_jack_pin[] = {
37 .pin = "Headphone Jack",
38 .mask = SND_JACK_HEADPHONE,
42 /* disable speaker when hp jack is inserted */
43 .mask = SND_JACK_HEADPHONE,
48 /* Headphones jack detection GPIO */
49 static struct snd_soc_jack_gpio hs_jack_gpio = {
50 .gpio = GPIO75_HX4700_EARPHONE_nDET,
53 .report = SND_JACK_HEADPHONE,
58 * iPAQ hx4700 uses I2S for capture and playback.
60 static int hx4700_hw_params(struct snd_pcm_substream *substream,
61 struct snd_pcm_hw_params *params)
63 struct snd_soc_pcm_runtime *rtd = substream->private_data;
64 struct snd_soc_dai *codec_dai = rtd->codec_dai;
65 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
68 /* set codec DAI configuration */
69 ret = snd_soc_dai_set_fmt(codec_dai,
70 SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
71 SND_SOC_DAIFMT_CBS_CFS);
75 /* set cpu DAI configuration */
76 ret = snd_soc_dai_set_fmt(cpu_dai,
77 SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
78 SND_SOC_DAIFMT_CBS_CFS);
82 /* set the I2S system clock as output */
83 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
88 /* inform codec driver about clock freq *
89 * (PXA I2S always uses divider 256) */
90 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 256 * params_rate(params),
98 static struct snd_soc_ops hx4700_ops = {
99 .hw_params = hx4700_hw_params,
102 static int hx4700_spk_power(struct snd_soc_dapm_widget *w,
103 struct snd_kcontrol *k, int event)
105 gpio_set_value(GPIO107_HX4700_SPK_nSD, !!SND_SOC_DAPM_EVENT_ON(event));
109 static int hx4700_hp_power(struct snd_soc_dapm_widget *w,
110 struct snd_kcontrol *k, int event)
112 gpio_set_value(GPIO92_HX4700_HP_DRIVER, !!SND_SOC_DAPM_EVENT_ON(event));
116 /* hx4700 machine dapm widgets */
117 static const struct snd_soc_dapm_widget hx4700_dapm_widgets[] = {
118 SND_SOC_DAPM_HP("Headphone Jack", hx4700_hp_power),
119 SND_SOC_DAPM_SPK("Speaker", hx4700_spk_power),
120 SND_SOC_DAPM_MIC("Built-in Microphone", NULL),
123 /* hx4700 machine audio_map */
124 static const struct snd_soc_dapm_route hx4700_audio_map[] = {
126 /* Headphone connected to LOUT, ROUT */
127 {"Headphone Jack", NULL, "LOUT"},
128 {"Headphone Jack", NULL, "ROUT"},
130 /* Speaker connected to MOUT2 */
131 {"Speaker", NULL, "MOUT2"},
133 /* Microphone connected to MICIN */
134 {"MICIN", NULL, "Built-in Microphone"},
135 {"AIN", NULL, "MICOUT"},
139 * Logic for a ak4641 as connected on a HP iPAQ hx4700
141 static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
143 struct snd_soc_codec *codec = rtd->codec;
144 struct snd_soc_dapm_context *dapm = &codec->dapm;
148 /* FIXME: is anything connected here? */
149 snd_soc_dapm_nc_pin(dapm, "MOUT1");
150 snd_soc_dapm_nc_pin(dapm, "MICEXT");
151 snd_soc_dapm_nc_pin(dapm, "AUX");
153 /* Jack detection API stuff */
154 err = snd_soc_jack_new(codec, "Headphone Jack",
155 SND_JACK_HEADPHONE, &hs_jack);
159 err = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pin),
164 err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
169 /* hx4700 digital audio interface glue - connects codec <--> CPU */
170 static struct snd_soc_dai_link hx4700_dai = {
172 .stream_name = "AK4641",
173 .cpu_dai_name = "pxa2xx-i2s",
174 .codec_dai_name = "ak4641-hifi",
175 .platform_name = "pxa-pcm-audio",
176 .codec_name = "ak4641.0-0012",
177 .init = hx4700_ak4641_init,
181 /* hx4700 audio machine driver */
182 static struct snd_soc_card snd_soc_card_hx4700 = {
183 .name = "iPAQ hx4700",
184 .dai_link = &hx4700_dai,
186 .dapm_widgets = hx4700_dapm_widgets,
187 .num_dapm_widgets = ARRAY_SIZE(hx4700_dapm_widgets),
188 .dapm_routes = hx4700_audio_map,
189 .num_dapm_routes = ARRAY_SIZE(hx4700_audio_map),
192 static struct gpio hx4700_audio_gpios[] = {
193 { GPIO107_HX4700_SPK_nSD, GPIOF_OUT_INIT_HIGH, "SPK_POWER" },
194 { GPIO92_HX4700_HP_DRIVER, GPIOF_OUT_INIT_LOW, "EP_POWER" },
197 static int __devinit hx4700_audio_probe(struct platform_device *pdev)
201 if (!machine_is_h4700())
204 ret = gpio_request_array(hx4700_audio_gpios,
205 ARRAY_SIZE(hx4700_audio_gpios));
209 snd_soc_card_hx4700.dev = &pdev->dev;
210 ret = snd_soc_register_card(&snd_soc_card_hx4700);
212 gpio_free_array(hx4700_audio_gpios,
213 ARRAY_SIZE(hx4700_audio_gpios));
218 static int __devexit hx4700_audio_remove(struct platform_device *pdev)
220 snd_soc_jack_free_gpios(&hs_jack, 1, &hs_jack_gpio);
221 snd_soc_unregister_card(&snd_soc_card_hx4700);
223 gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
224 gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
226 gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
230 static struct platform_driver hx4700_audio_driver = {
232 .name = "hx4700-audio",
233 .owner = THIS_MODULE,
234 .pm = &snd_soc_pm_ops,
236 .probe = hx4700_audio_probe,
237 .remove = __devexit_p(hx4700_audio_remove),
240 static int __init hx4700_modinit(void)
242 return platform_driver_register(&hx4700_audio_driver);
244 module_init(hx4700_modinit);
246 static void __exit hx4700_modexit(void)
248 platform_driver_unregister(&hx4700_audio_driver);
251 module_exit(hx4700_modexit);
253 MODULE_AUTHOR("Philipp Zabel");
254 MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
255 MODULE_LICENSE("GPL");
256 MODULE_ALIAS("platform:hx4700-audio");