1 /*
2 * SoC audio for HP iPAQ hx4700
3 *
4 * Copyright (c) 2009 Philipp Zabel
5 *
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.
10 *
11 */
12
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>
19
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>
25
26 #include <mach/hx4700.h>
27 #include <asm/mach-types.h>
28 #include "pxa2xx-i2s.h"
29
30 #include "../codecs/ak4641.h"
31
32 static struct snd_soc_jack hs_jack;
33
34 /* Headphones jack detection DAPM pin */
35 static struct snd_soc_jack_pin hs_jack_pin[] = {
36 {
37 .pin = "Headphone Jack",
38 .mask = SND_JACK_HEADPHONE,
39 },
40 {
41 .pin = "Speaker",
42 /* disable speaker when hp jack is inserted */
43 .mask = SND_JACK_HEADPHONE,
44 .invert = 1,
45 },
46 };
47
48 /* Headphones jack detection GPIO */
49 static struct snd_soc_jack_gpio hs_jack_gpio = {
50 .gpio = GPIO75_HX4700_EARPHONE_nDET,
51 .invert = true,
52 .name = "hp-gpio",
53 .report = SND_JACK_HEADPHONE,
54 .debounce_time = 200,
55 };
56
57 /*
58 * iPAQ hx4700 uses I2S for capture and playback.
59 */
hx4700_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)60 static int hx4700_hw_params(struct snd_pcm_substream *substream,
61 struct snd_pcm_hw_params *params)
62 {
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;
66 int ret = 0;
67
68 /* set the I2S system clock as output */
69 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
70 SND_SOC_CLOCK_OUT);
71 if (ret < 0)
72 return ret;
73
74 /* inform codec driver about clock freq *
75 * (PXA I2S always uses divider 256) */
76 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 256 * params_rate(params),
77 SND_SOC_CLOCK_IN);
78 if (ret < 0)
79 return ret;
80
81 return 0;
82 }
83
84 static struct snd_soc_ops hx4700_ops = {
85 .hw_params = hx4700_hw_params,
86 };
87
hx4700_spk_power(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)88 static int hx4700_spk_power(struct snd_soc_dapm_widget *w,
89 struct snd_kcontrol *k, int event)
90 {
91 gpio_set_value(GPIO107_HX4700_SPK_nSD, !!SND_SOC_DAPM_EVENT_ON(event));
92 return 0;
93 }
94
hx4700_hp_power(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)95 static int hx4700_hp_power(struct snd_soc_dapm_widget *w,
96 struct snd_kcontrol *k, int event)
97 {
98 gpio_set_value(GPIO92_HX4700_HP_DRIVER, !!SND_SOC_DAPM_EVENT_ON(event));
99 return 0;
100 }
101
102 /* hx4700 machine dapm widgets */
103 static const struct snd_soc_dapm_widget hx4700_dapm_widgets[] = {
104 SND_SOC_DAPM_HP("Headphone Jack", hx4700_hp_power),
105 SND_SOC_DAPM_SPK("Speaker", hx4700_spk_power),
106 SND_SOC_DAPM_MIC("Built-in Microphone", NULL),
107 };
108
109 /* hx4700 machine audio_map */
110 static const struct snd_soc_dapm_route hx4700_audio_map[] = {
111
112 /* Headphone connected to LOUT, ROUT */
113 {"Headphone Jack", NULL, "LOUT"},
114 {"Headphone Jack", NULL, "ROUT"},
115
116 /* Speaker connected to MOUT2 */
117 {"Speaker", NULL, "MOUT2"},
118
119 /* Microphone connected to MICIN */
120 {"MICIN", NULL, "Built-in Microphone"},
121 {"AIN", NULL, "MICOUT"},
122 };
123
124 /*
125 * Logic for a ak4641 as connected on a HP iPAQ hx4700
126 */
hx4700_ak4641_init(struct snd_soc_pcm_runtime * rtd)127 static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
128 {
129 struct snd_soc_codec *codec = rtd->codec;
130 struct snd_soc_dapm_context *dapm = &codec->dapm;
131 int err;
132
133 /* NC codec pins */
134 /* FIXME: is anything connected here? */
135 snd_soc_dapm_nc_pin(dapm, "MOUT1");
136 snd_soc_dapm_nc_pin(dapm, "MICEXT");
137 snd_soc_dapm_nc_pin(dapm, "AUX");
138
139 /* Jack detection API stuff */
140 err = snd_soc_jack_new(codec, "Headphone Jack",
141 SND_JACK_HEADPHONE, &hs_jack);
142 if (err)
143 return err;
144
145 err = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pin),
146 hs_jack_pin);
147 if (err)
148 return err;
149
150 err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
151
152 return err;
153 }
154
155 /* hx4700 digital audio interface glue - connects codec <--> CPU */
156 static struct snd_soc_dai_link hx4700_dai = {
157 .name = "ak4641",
158 .stream_name = "AK4641",
159 .cpu_dai_name = "pxa2xx-i2s",
160 .codec_dai_name = "ak4641-hifi",
161 .platform_name = "pxa-pcm-audio",
162 .codec_name = "ak4641.0-0012",
163 .init = hx4700_ak4641_init,
164 .dai_fmt = SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
165 SND_SOC_DAIFMT_CBS_CFS,
166 .ops = &hx4700_ops,
167 };
168
169 /* hx4700 audio machine driver */
170 static struct snd_soc_card snd_soc_card_hx4700 = {
171 .name = "iPAQ hx4700",
172 .owner = THIS_MODULE,
173 .dai_link = &hx4700_dai,
174 .num_links = 1,
175 .dapm_widgets = hx4700_dapm_widgets,
176 .num_dapm_widgets = ARRAY_SIZE(hx4700_dapm_widgets),
177 .dapm_routes = hx4700_audio_map,
178 .num_dapm_routes = ARRAY_SIZE(hx4700_audio_map),
179 };
180
181 static struct gpio hx4700_audio_gpios[] = {
182 { GPIO107_HX4700_SPK_nSD, GPIOF_OUT_INIT_HIGH, "SPK_POWER" },
183 { GPIO92_HX4700_HP_DRIVER, GPIOF_OUT_INIT_LOW, "EP_POWER" },
184 };
185
hx4700_audio_probe(struct platform_device * pdev)186 static int __devinit hx4700_audio_probe(struct platform_device *pdev)
187 {
188 int ret;
189
190 if (!machine_is_h4700())
191 return -ENODEV;
192
193 ret = gpio_request_array(hx4700_audio_gpios,
194 ARRAY_SIZE(hx4700_audio_gpios));
195 if (ret)
196 return ret;
197
198 snd_soc_card_hx4700.dev = &pdev->dev;
199 ret = snd_soc_register_card(&snd_soc_card_hx4700);
200 if (ret)
201 gpio_free_array(hx4700_audio_gpios,
202 ARRAY_SIZE(hx4700_audio_gpios));
203
204 return ret;
205 }
206
hx4700_audio_remove(struct platform_device * pdev)207 static int __devexit hx4700_audio_remove(struct platform_device *pdev)
208 {
209 snd_soc_jack_free_gpios(&hs_jack, 1, &hs_jack_gpio);
210 snd_soc_unregister_card(&snd_soc_card_hx4700);
211
212 gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
213 gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
214
215 gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
216 return 0;
217 }
218
219 static struct platform_driver hx4700_audio_driver = {
220 .driver = {
221 .name = "hx4700-audio",
222 .owner = THIS_MODULE,
223 .pm = &snd_soc_pm_ops,
224 },
225 .probe = hx4700_audio_probe,
226 .remove = __devexit_p(hx4700_audio_remove),
227 };
228
229 module_platform_driver(hx4700_audio_driver);
230
231 MODULE_AUTHOR("Philipp Zabel");
232 MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
233 MODULE_LICENSE("GPL");
234 MODULE_ALIAS("platform:hx4700-audio");
235