1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * SoC audio for HP iPAQ hx4700
5 * Copyright (c) 2009 Philipp Zabel
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.h>
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>
21 #include <mach/hx4700.h>
22 #include <asm/mach-types.h>
23 #include "pxa2xx-i2s.h"
25 static struct snd_soc_jack hs_jack
;
27 /* Headphones jack detection DAPM pin */
28 static struct snd_soc_jack_pin hs_jack_pin
[] = {
30 .pin
= "Headphone Jack",
31 .mask
= SND_JACK_HEADPHONE
,
35 /* disable speaker when hp jack is inserted */
36 .mask
= SND_JACK_HEADPHONE
,
41 /* Headphones jack detection GPIO */
42 static struct snd_soc_jack_gpio hs_jack_gpio
= {
43 .gpio
= GPIO75_HX4700_EARPHONE_nDET
,
46 .report
= SND_JACK_HEADPHONE
,
51 * iPAQ hx4700 uses I2S for capture and playback.
53 static int hx4700_hw_params(struct snd_pcm_substream
*substream
,
54 struct snd_pcm_hw_params
*params
)
56 struct snd_soc_pcm_runtime
*rtd
= asoc_substream_to_rtd(substream
);
57 struct snd_soc_dai
*codec_dai
= asoc_rtd_to_codec(rtd
, 0);
58 struct snd_soc_dai
*cpu_dai
= asoc_rtd_to_cpu(rtd
, 0);
61 /* set the I2S system clock as output */
62 ret
= snd_soc_dai_set_sysclk(cpu_dai
, PXA2XX_I2S_SYSCLK
, 0,
67 /* inform codec driver about clock freq *
68 * (PXA I2S always uses divider 256) */
69 ret
= snd_soc_dai_set_sysclk(codec_dai
, 0, 256 * params_rate(params
),
77 static const struct snd_soc_ops hx4700_ops
= {
78 .hw_params
= hx4700_hw_params
,
81 static int hx4700_spk_power(struct snd_soc_dapm_widget
*w
,
82 struct snd_kcontrol
*k
, int event
)
84 gpio_set_value(GPIO107_HX4700_SPK_nSD
, !!SND_SOC_DAPM_EVENT_ON(event
));
88 static int hx4700_hp_power(struct snd_soc_dapm_widget
*w
,
89 struct snd_kcontrol
*k
, int event
)
91 gpio_set_value(GPIO92_HX4700_HP_DRIVER
, !!SND_SOC_DAPM_EVENT_ON(event
));
95 /* hx4700 machine dapm widgets */
96 static const struct snd_soc_dapm_widget hx4700_dapm_widgets
[] = {
97 SND_SOC_DAPM_HP("Headphone Jack", hx4700_hp_power
),
98 SND_SOC_DAPM_SPK("Speaker", hx4700_spk_power
),
99 SND_SOC_DAPM_MIC("Built-in Microphone", NULL
),
102 /* hx4700 machine audio_map */
103 static const struct snd_soc_dapm_route hx4700_audio_map
[] = {
105 /* Headphone connected to LOUT, ROUT */
106 {"Headphone Jack", NULL
, "LOUT"},
107 {"Headphone Jack", NULL
, "ROUT"},
109 /* Speaker connected to MOUT2 */
110 {"Speaker", NULL
, "MOUT2"},
112 /* Microphone connected to MICIN */
113 {"MICIN", NULL
, "Built-in Microphone"},
114 {"AIN", NULL
, "MICOUT"},
118 * Logic for a ak4641 as connected on a HP iPAQ hx4700
120 static int hx4700_ak4641_init(struct snd_soc_pcm_runtime
*rtd
)
124 /* Jack detection API stuff */
125 err
= snd_soc_card_jack_new(rtd
->card
, "Headphone Jack",
126 SND_JACK_HEADPHONE
, &hs_jack
, hs_jack_pin
,
127 ARRAY_SIZE(hs_jack_pin
));
131 err
= snd_soc_jack_add_gpios(&hs_jack
, 1, &hs_jack_gpio
);
136 /* hx4700 digital audio interface glue - connects codec <--> CPU */
137 SND_SOC_DAILINK_DEFS(ak4641
,
138 DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
139 DAILINK_COMP_ARRAY(COMP_CODEC("ak4641.0-0012", "ak4641-hifi")),
140 DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
142 static struct snd_soc_dai_link hx4700_dai
= {
144 .stream_name
= "AK4641",
145 .init
= hx4700_ak4641_init
,
146 .dai_fmt
= SND_SOC_DAIFMT_MSB
| SND_SOC_DAIFMT_NB_NF
|
147 SND_SOC_DAIFMT_CBS_CFS
,
149 SND_SOC_DAILINK_REG(ak4641
),
152 /* hx4700 audio machine driver */
153 static struct snd_soc_card snd_soc_card_hx4700
= {
154 .name
= "iPAQ hx4700",
155 .owner
= THIS_MODULE
,
156 .dai_link
= &hx4700_dai
,
158 .dapm_widgets
= hx4700_dapm_widgets
,
159 .num_dapm_widgets
= ARRAY_SIZE(hx4700_dapm_widgets
),
160 .dapm_routes
= hx4700_audio_map
,
161 .num_dapm_routes
= ARRAY_SIZE(hx4700_audio_map
),
162 .fully_routed
= true,
165 static struct gpio hx4700_audio_gpios
[] = {
166 { GPIO107_HX4700_SPK_nSD
, GPIOF_OUT_INIT_HIGH
, "SPK_POWER" },
167 { GPIO92_HX4700_HP_DRIVER
, GPIOF_OUT_INIT_LOW
, "EP_POWER" },
170 static int hx4700_audio_probe(struct platform_device
*pdev
)
174 if (!machine_is_h4700())
177 ret
= gpio_request_array(hx4700_audio_gpios
,
178 ARRAY_SIZE(hx4700_audio_gpios
));
182 snd_soc_card_hx4700
.dev
= &pdev
->dev
;
183 ret
= devm_snd_soc_register_card(&pdev
->dev
, &snd_soc_card_hx4700
);
185 gpio_free_array(hx4700_audio_gpios
,
186 ARRAY_SIZE(hx4700_audio_gpios
));
191 static int hx4700_audio_remove(struct platform_device
*pdev
)
193 gpio_set_value(GPIO92_HX4700_HP_DRIVER
, 0);
194 gpio_set_value(GPIO107_HX4700_SPK_nSD
, 0);
196 gpio_free_array(hx4700_audio_gpios
, ARRAY_SIZE(hx4700_audio_gpios
));
200 static struct platform_driver hx4700_audio_driver
= {
202 .name
= "hx4700-audio",
203 .pm
= &snd_soc_pm_ops
,
205 .probe
= hx4700_audio_probe
,
206 .remove
= hx4700_audio_remove
,
209 module_platform_driver(hx4700_audio_driver
);
211 MODULE_AUTHOR("Philipp Zabel");
212 MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
213 MODULE_LICENSE("GPL");
214 MODULE_ALIAS("platform:hx4700-audio");