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 static struct snd_soc_jack hs_jack;
31
32 /* Headphones jack detection DAPM pin */
33 static struct snd_soc_jack_pin hs_jack_pin[] = {
34 {
35 .pin = "Headphone Jack",
36 .mask = SND_JACK_HEADPHONE,
37 },
38 {
39 .pin = "Speaker",
40 /* disable speaker when hp jack is inserted */
41 .mask = SND_JACK_HEADPHONE,
42 .invert = 1,
43 },
44 };
45
46 /* Headphones jack detection GPIO */
47 static struct snd_soc_jack_gpio hs_jack_gpio = {
48 .gpio = GPIO75_HX4700_EARPHONE_nDET,
49 .invert = true,
50 .name = "hp-gpio",
51 .report = SND_JACK_HEADPHONE,
52 .debounce_time = 200,
53 };
54
55 /*
56 * iPAQ hx4700 uses I2S for capture and playback.
57 */
hx4700_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)58 static int hx4700_hw_params(struct snd_pcm_substream *substream,
59 struct snd_pcm_hw_params *params)
60 {
61 struct snd_soc_pcm_runtime *rtd = substream->private_data;
62 struct snd_soc_dai *codec_dai = rtd->codec_dai;
63 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
64 int ret = 0;
65
66 /* set the I2S system clock as output */
67 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
68 SND_SOC_CLOCK_OUT);
69 if (ret < 0)
70 return ret;
71
72 /* inform codec driver about clock freq *
73 * (PXA I2S always uses divider 256) */
74 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 256 * params_rate(params),
75 SND_SOC_CLOCK_IN);
76 if (ret < 0)
77 return ret;
78
79 return 0;
80 }
81
82 static const struct snd_soc_ops hx4700_ops = {
83 .hw_params = hx4700_hw_params,
84 };
85
hx4700_spk_power(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)86 static int hx4700_spk_power(struct snd_soc_dapm_widget *w,
87 struct snd_kcontrol *k, int event)
88 {
89 gpio_set_value(GPIO107_HX4700_SPK_nSD, !!SND_SOC_DAPM_EVENT_ON(event));
90 return 0;
91 }
92
hx4700_hp_power(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)93 static int hx4700_hp_power(struct snd_soc_dapm_widget *w,
94 struct snd_kcontrol *k, int event)
95 {
96 gpio_set_value(GPIO92_HX4700_HP_DRIVER, !!SND_SOC_DAPM_EVENT_ON(event));
97 return 0;
98 }
99
100 /* hx4700 machine dapm widgets */
101 static const struct snd_soc_dapm_widget hx4700_dapm_widgets[] = {
102 SND_SOC_DAPM_HP("Headphone Jack", hx4700_hp_power),
103 SND_SOC_DAPM_SPK("Speaker", hx4700_spk_power),
104 SND_SOC_DAPM_MIC("Built-in Microphone", NULL),
105 };
106
107 /* hx4700 machine audio_map */
108 static const struct snd_soc_dapm_route hx4700_audio_map[] = {
109
110 /* Headphone connected to LOUT, ROUT */
111 {"Headphone Jack", NULL, "LOUT"},
112 {"Headphone Jack", NULL, "ROUT"},
113
114 /* Speaker connected to MOUT2 */
115 {"Speaker", NULL, "MOUT2"},
116
117 /* Microphone connected to MICIN */
118 {"MICIN", NULL, "Built-in Microphone"},
119 {"AIN", NULL, "MICOUT"},
120 };
121
122 /*
123 * Logic for a ak4641 as connected on a HP iPAQ hx4700
124 */
hx4700_ak4641_init(struct snd_soc_pcm_runtime * rtd)125 static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
126 {
127 int err;
128
129 /* Jack detection API stuff */
130 err = snd_soc_card_jack_new(rtd->card, "Headphone Jack",
131 SND_JACK_HEADPHONE, &hs_jack, hs_jack_pin,
132 ARRAY_SIZE(hs_jack_pin));
133 if (err)
134 return err;
135
136 err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
137
138 return err;
139 }
140
141 /* hx4700 digital audio interface glue - connects codec <--> CPU */
142 static struct snd_soc_dai_link hx4700_dai = {
143 .name = "ak4641",
144 .stream_name = "AK4641",
145 .cpu_dai_name = "pxa2xx-i2s",
146 .codec_dai_name = "ak4641-hifi",
147 .platform_name = "pxa-pcm-audio",
148 .codec_name = "ak4641.0-0012",
149 .init = hx4700_ak4641_init,
150 .dai_fmt = SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
151 SND_SOC_DAIFMT_CBS_CFS,
152 .ops = &hx4700_ops,
153 };
154
155 /* hx4700 audio machine driver */
156 static struct snd_soc_card snd_soc_card_hx4700 = {
157 .name = "iPAQ hx4700",
158 .owner = THIS_MODULE,
159 .dai_link = &hx4700_dai,
160 .num_links = 1,
161 .dapm_widgets = hx4700_dapm_widgets,
162 .num_dapm_widgets = ARRAY_SIZE(hx4700_dapm_widgets),
163 .dapm_routes = hx4700_audio_map,
164 .num_dapm_routes = ARRAY_SIZE(hx4700_audio_map),
165 .fully_routed = true,
166 };
167
168 static struct gpio hx4700_audio_gpios[] = {
169 { GPIO107_HX4700_SPK_nSD, GPIOF_OUT_INIT_HIGH, "SPK_POWER" },
170 { GPIO92_HX4700_HP_DRIVER, GPIOF_OUT_INIT_LOW, "EP_POWER" },
171 };
172
hx4700_audio_probe(struct platform_device * pdev)173 static int hx4700_audio_probe(struct platform_device *pdev)
174 {
175 int ret;
176
177 if (!machine_is_h4700())
178 return -ENODEV;
179
180 ret = gpio_request_array(hx4700_audio_gpios,
181 ARRAY_SIZE(hx4700_audio_gpios));
182 if (ret)
183 return ret;
184
185 snd_soc_card_hx4700.dev = &pdev->dev;
186 ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_hx4700);
187 if (ret)
188 gpio_free_array(hx4700_audio_gpios,
189 ARRAY_SIZE(hx4700_audio_gpios));
190
191 return ret;
192 }
193
hx4700_audio_remove(struct platform_device * pdev)194 static int hx4700_audio_remove(struct platform_device *pdev)
195 {
196 gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
197 gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
198
199 gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
200 return 0;
201 }
202
203 static struct platform_driver hx4700_audio_driver = {
204 .driver = {
205 .name = "hx4700-audio",
206 .pm = &snd_soc_pm_ops,
207 },
208 .probe = hx4700_audio_probe,
209 .remove = hx4700_audio_remove,
210 };
211
212 module_platform_driver(hx4700_audio_driver);
213
214 MODULE_AUTHOR("Philipp Zabel");
215 MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
216 MODULE_LICENSE("GPL");
217 MODULE_ALIAS("platform:hx4700-audio");
218
