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.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 <mach/hx4700.h>
 22#include <asm/mach-types.h>
 23#include "pxa2xx-i2s.h"
 24
 25static struct snd_soc_jack hs_jack;
 26
 27/* Headphones jack detection DAPM pin */
 28static struct snd_soc_jack_pin hs_jack_pin[] = {
 29	{
 30		.pin	= "Headphone Jack",
 31		.mask	= SND_JACK_HEADPHONE,
 32	},
 33	{
 34		.pin	= "Speaker",
 35		/* disable speaker when hp jack is inserted */
 36		.mask   = SND_JACK_HEADPHONE,
 37		.invert	= 1,
 38	},
 39};
 40
 41/* Headphones jack detection GPIO */
 42static struct snd_soc_jack_gpio hs_jack_gpio = {
 43	.gpio		= GPIO75_HX4700_EARPHONE_nDET,
 44	.invert		= true,
 45	.name		= "hp-gpio",
 46	.report		= SND_JACK_HEADPHONE,
 47	.debounce_time	= 200,
 48};
 49
 50/*
 51 * iPAQ hx4700 uses I2S for capture and playback.
 52 */
 53static int hx4700_hw_params(struct snd_pcm_substream *substream,
 54			    struct snd_pcm_hw_params *params)
 55{
 56	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 57	struct snd_soc_dai *codec_dai = rtd->codec_dai;
 58	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 59	int ret = 0;
 60
 61	/* set the I2S system clock as output */
 62	ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 63			SND_SOC_CLOCK_OUT);
 64	if (ret < 0)
 65		return ret;
 66
 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),
 70			SND_SOC_CLOCK_IN);
 71	if (ret < 0)
 72		return ret;
 73
 74	return 0;
 75}
 76
 77static const struct snd_soc_ops hx4700_ops = {
 78	.hw_params = hx4700_hw_params,
 79};
 80
 81static int hx4700_spk_power(struct snd_soc_dapm_widget *w,
 82			    struct snd_kcontrol *k, int event)
 83{
 84	gpio_set_value(GPIO107_HX4700_SPK_nSD, !!SND_SOC_DAPM_EVENT_ON(event));
 85	return 0;
 86}
 87
 88static int hx4700_hp_power(struct snd_soc_dapm_widget *w,
 89			   struct snd_kcontrol *k, int event)
 90{
 91	gpio_set_value(GPIO92_HX4700_HP_DRIVER, !!SND_SOC_DAPM_EVENT_ON(event));
 92	return 0;
 93}
 94
 95/* hx4700 machine dapm widgets */
 96static 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),
100};
101
102/* hx4700 machine audio_map */
103static const struct snd_soc_dapm_route hx4700_audio_map[] = {
104
105	/* Headphone connected to LOUT, ROUT */
106	{"Headphone Jack", NULL, "LOUT"},
107	{"Headphone Jack", NULL, "ROUT"},
108
109	/* Speaker connected to MOUT2 */
110	{"Speaker", NULL, "MOUT2"},
111
112	/* Microphone connected to MICIN */
113	{"MICIN", NULL, "Built-in Microphone"},
114	{"AIN", NULL, "MICOUT"},
115};
116
117/*
118 * Logic for a ak4641 as connected on a HP iPAQ hx4700
119 */
120static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
121{
122	int err;
123
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));
128	if (err)
129		return err;
130
131	err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
132
133	return err;
134}
135
136/* hx4700 digital audio interface glue - connects codec <--> CPU */
137SND_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")));
141
142static struct snd_soc_dai_link hx4700_dai = {
143	.name = "ak4641",
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,
148	.ops = &hx4700_ops,
149	SND_SOC_DAILINK_REG(ak4641),
150};
151
152/* hx4700 audio machine driver */
153static struct snd_soc_card snd_soc_card_hx4700 = {
154	.name			= "iPAQ hx4700",
155	.owner			= THIS_MODULE,
156	.dai_link		= &hx4700_dai,
157	.num_links		= 1,
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,
163};
164
165static 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" },
168};
169
170static int hx4700_audio_probe(struct platform_device *pdev)
171{
172	int ret;
173
174	if (!machine_is_h4700())
175		return -ENODEV;
176
177	ret = gpio_request_array(hx4700_audio_gpios,
178				ARRAY_SIZE(hx4700_audio_gpios));
179	if (ret)
180		return ret;
181
182	snd_soc_card_hx4700.dev = &pdev->dev;
183	ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_hx4700);
184	if (ret)
185		gpio_free_array(hx4700_audio_gpios,
186				ARRAY_SIZE(hx4700_audio_gpios));
187
188	return ret;
189}
190
191static int hx4700_audio_remove(struct platform_device *pdev)
192{
193	gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
194	gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
195
196	gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
197	return 0;
198}
199
200static struct platform_driver hx4700_audio_driver = {
201	.driver	= {
202		.name = "hx4700-audio",
203		.pm = &snd_soc_pm_ops,
204	},
205	.probe	= hx4700_audio_probe,
206	.remove	= hx4700_audio_remove,
207};
208
209module_platform_driver(hx4700_audio_driver);
210
211MODULE_AUTHOR("Philipp Zabel");
212MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
213MODULE_LICENSE("GPL");
214MODULE_ALIAS("platform:hx4700-audio");