1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * SoC audio for HP iPAQ hx4700
4 *
5 * Copyright (c) 2009 Philipp Zabel
6 */
7
8 #include <linux/module.h>
9 #include <linux/timer.h>
10 #include <linux/interrupt.h>
11 #include <linux/platform_device.h>
12 #include <linux/delay.h>
13 #include <linux/gpio/consumer.h>
14
15 #include <sound/core.h>
16 #include <sound/jack.h>
17 #include <sound/pcm.h>
18 #include <sound/pcm_params.h>
19 #include <sound/soc.h>
20
21 #include <asm/mach-types.h>
22 #include "pxa2xx-i2s.h"
23
24 static struct gpio_desc *gpiod_hp_driver, *gpiod_spk_sd;
25 static struct snd_soc_jack hs_jack;
26
27 /* Headphones jack detection DAPM pin */
28 static struct snd_soc_jack_pin hs_jack_pin[] = {
29 {
30 .pin = "Headphone Jack",
31 .mask = SND_JACK_HEADPHONE,
32 .invert = 1,
33 },
34 {
35 .pin = "Speaker",
36 /* disable speaker when hp jack is inserted */
37 .mask = SND_JACK_HEADPHONE,
38 },
39 };
40
41 /* Headphones jack detection GPIO */
42 static struct snd_soc_jack_gpio hs_jack_gpio = {
43 .name = "earphone-det",
44 .report = SND_JACK_HEADPHONE,
45 .debounce_time = 200,
46 };
47
48 /*
49 * iPAQ hx4700 uses I2S for capture and playback.
50 */
hx4700_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)51 static int hx4700_hw_params(struct snd_pcm_substream *substream,
52 struct snd_pcm_hw_params *params)
53 {
54 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
55 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
56 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
57 int ret = 0;
58
59 /* set the I2S system clock as output */
60 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
61 SND_SOC_CLOCK_OUT);
62 if (ret < 0)
63 return ret;
64
65 /* inform codec driver about clock freq *
66 * (PXA I2S always uses divider 256) */
67 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 256 * params_rate(params),
68 SND_SOC_CLOCK_IN);
69 if (ret < 0)
70 return ret;
71
72 return 0;
73 }
74
75 static const struct snd_soc_ops hx4700_ops = {
76 .hw_params = hx4700_hw_params,
77 };
78
hx4700_spk_power(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)79 static int hx4700_spk_power(struct snd_soc_dapm_widget *w,
80 struct snd_kcontrol *k, int event)
81 {
82 gpiod_set_value(gpiod_spk_sd, !SND_SOC_DAPM_EVENT_ON(event));
83 return 0;
84 }
85
hx4700_hp_power(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)86 static int hx4700_hp_power(struct snd_soc_dapm_widget *w,
87 struct snd_kcontrol *k, int event)
88 {
89 gpiod_set_value(gpiod_hp_driver, !!SND_SOC_DAPM_EVENT_ON(event));
90 return 0;
91 }
92
93 /* hx4700 machine dapm widgets */
94 static const struct snd_soc_dapm_widget hx4700_dapm_widgets[] = {
95 SND_SOC_DAPM_HP("Headphone Jack", hx4700_hp_power),
96 SND_SOC_DAPM_SPK("Speaker", hx4700_spk_power),
97 SND_SOC_DAPM_MIC("Built-in Microphone", NULL),
98 };
99
100 /* hx4700 machine audio_map */
101 static const struct snd_soc_dapm_route hx4700_audio_map[] = {
102
103 /* Headphone connected to LOUT, ROUT */
104 {"Headphone Jack", NULL, "LOUT"},
105 {"Headphone Jack", NULL, "ROUT"},
106
107 /* Speaker connected to MOUT2 */
108 {"Speaker", NULL, "MOUT2"},
109
110 /* Microphone connected to MICIN */
111 {"MICIN", NULL, "Built-in Microphone"},
112 {"AIN", NULL, "MICOUT"},
113 };
114
115 /*
116 * Logic for a ak4641 as connected on a HP iPAQ hx4700
117 */
hx4700_ak4641_init(struct snd_soc_pcm_runtime * rtd)118 static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
119 {
120 int err;
121
122 /* Jack detection API stuff */
123 err = snd_soc_card_jack_new_pins(rtd->card, "Headphone Jack",
124 SND_JACK_HEADPHONE, &hs_jack,
125 hs_jack_pin, ARRAY_SIZE(hs_jack_pin));
126 if (err)
127 return err;
128
129 err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
130
131 return err;
132 }
133
134 /* hx4700 digital audio interface glue - connects codec <--> CPU */
135 SND_SOC_DAILINK_DEFS(ak4641,
136 DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
137 DAILINK_COMP_ARRAY(COMP_CODEC("ak4641.0-0012", "ak4641-hifi")),
138 DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
139
140 static struct snd_soc_dai_link hx4700_dai = {
141 .name = "ak4641",
142 .stream_name = "AK4641",
143 .init = hx4700_ak4641_init,
144 .dai_fmt = SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
145 SND_SOC_DAIFMT_CBS_CFS,
146 .ops = &hx4700_ops,
147 SND_SOC_DAILINK_REG(ak4641),
148 };
149
150 /* hx4700 audio machine driver */
151 static struct snd_soc_card snd_soc_card_hx4700 = {
152 .name = "iPAQ hx4700",
153 .owner = THIS_MODULE,
154 .dai_link = &hx4700_dai,
155 .num_links = 1,
156 .dapm_widgets = hx4700_dapm_widgets,
157 .num_dapm_widgets = ARRAY_SIZE(hx4700_dapm_widgets),
158 .dapm_routes = hx4700_audio_map,
159 .num_dapm_routes = ARRAY_SIZE(hx4700_audio_map),
160 .fully_routed = true,
161 };
162
hx4700_audio_probe(struct platform_device * pdev)163 static int hx4700_audio_probe(struct platform_device *pdev)
164 {
165 int ret;
166
167 if (!machine_is_h4700())
168 return -ENODEV;
169
170 gpiod_hp_driver = devm_gpiod_get(&pdev->dev, "hp-driver", GPIOD_ASIS);
171 ret = PTR_ERR_OR_ZERO(gpiod_hp_driver);
172 if (ret)
173 return ret;
174 gpiod_spk_sd = devm_gpiod_get(&pdev->dev, "spk-sd", GPIOD_ASIS);
175 ret = PTR_ERR_OR_ZERO(gpiod_spk_sd);
176 if (ret)
177 return ret;
178
179 hs_jack_gpio.gpiod_dev = &pdev->dev;
180 snd_soc_card_hx4700.dev = &pdev->dev;
181 ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_hx4700);
182
183 return ret;
184 }
185
hx4700_audio_remove(struct platform_device * pdev)186 static int hx4700_audio_remove(struct platform_device *pdev)
187 {
188 gpiod_set_value(gpiod_hp_driver, 0);
189 gpiod_set_value(gpiod_spk_sd, 0);
190 return 0;
191 }
192
193 static struct platform_driver hx4700_audio_driver = {
194 .driver = {
195 .name = "hx4700-audio",
196 .pm = &snd_soc_pm_ops,
197 },
198 .probe = hx4700_audio_probe,
199 .remove = hx4700_audio_remove,
200 };
201
202 module_platform_driver(hx4700_audio_driver);
203
204 MODULE_AUTHOR("Philipp Zabel");
205 MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
206 MODULE_LICENSE("GPL");
207 MODULE_ALIAS("platform:hx4700-audio");
208