1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * linux/sound/soc/pxa/z2.c
  4 *
  5 * SoC Audio driver for Aeronix Zipit Z2
  6 *
  7 * Copyright (C) 2009 Ken McGuire <kenm@desertweyr.com>
  8 * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
  9 */
 10
 11#include <linux/module.h>
 12#include <linux/moduleparam.h>
 13#include <linux/timer.h>
 14#include <linux/interrupt.h>
 15#include <linux/platform_device.h>
 16#include <linux/gpio.h>
 17
 18#include <sound/core.h>
 19#include <sound/pcm.h>
 20#include <sound/soc.h>
 21#include <sound/jack.h>
 22
 23#include <asm/mach-types.h>
 24#include <mach/hardware.h>
 25#include <mach/audio.h>
 26#include <mach/z2.h>
 27
 28#include "../codecs/wm8750.h"
 29#include "pxa2xx-i2s.h"
 30
 31static struct snd_soc_card snd_soc_z2;
 32
 33static int z2_hw_params(struct snd_pcm_substream *substream,
 34	struct snd_pcm_hw_params *params)
 35{
 36	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 37	struct snd_soc_dai *codec_dai = rtd->codec_dai;
 38	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 39	unsigned int clk = 0;
 40	int ret = 0;
 41
 42	switch (params_rate(params)) {
 43	case 8000:
 44	case 16000:
 45	case 48000:
 46	case 96000:
 47		clk = 12288000;
 48		break;
 49	case 11025:
 50	case 22050:
 51	case 44100:
 52		clk = 11289600;
 53		break;
 54	}
 55
 56	/* set the codec system clock for DAC and ADC */
 57	ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
 58		SND_SOC_CLOCK_IN);
 59	if (ret < 0)
 60		return ret;
 61
 62	/* set the I2S system clock as input (unused) */
 63	ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 64		SND_SOC_CLOCK_IN);
 65	if (ret < 0)
 66		return ret;
 67
 68	return 0;
 69}
 70
 71static struct snd_soc_jack hs_jack;
 72
 73/* Headset jack detection DAPM pins */
 74static struct snd_soc_jack_pin hs_jack_pins[] = {
 75	{
 76		.pin	= "Mic Jack",
 77		.mask	= SND_JACK_MICROPHONE,
 78	},
 79	{
 80		.pin	= "Headphone Jack",
 81		.mask	= SND_JACK_HEADPHONE,
 82	},
 83	{
 84		.pin    = "Ext Spk",
 85		.mask   = SND_JACK_HEADPHONE,
 86		.invert = 1
 87	},
 88};
 89
 90/* Headset jack detection gpios */
 91static struct snd_soc_jack_gpio hs_jack_gpios[] = {
 92	{
 93		.gpio		= GPIO37_ZIPITZ2_HEADSET_DETECT,
 94		.name		= "hsdet-gpio",
 95		.report		= SND_JACK_HEADSET,
 96		.debounce_time	= 200,
 97		.invert		= 1,
 98	},
 99};
100
101/* z2 machine dapm widgets */
102static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
103	SND_SOC_DAPM_HP("Headphone Jack", NULL),
104	SND_SOC_DAPM_MIC("Mic Jack", NULL),
105	SND_SOC_DAPM_SPK("Ext Spk", NULL),
106
107	/* headset is a mic and mono headphone */
108	SND_SOC_DAPM_HP("Headset Jack", NULL),
109};
110
111/* Z2 machine audio_map */
112static const struct snd_soc_dapm_route z2_audio_map[] = {
113
114	/* headphone connected to LOUT1, ROUT1 */
115	{"Headphone Jack", NULL, "LOUT1"},
116	{"Headphone Jack", NULL, "ROUT1"},
117
118	/* ext speaker connected to LOUT2, ROUT2  */
119	{"Ext Spk", NULL, "ROUT2"},
120	{"Ext Spk", NULL, "LOUT2"},
121
122	/* mic is connected to R input 2 - with bias */
123	{"RINPUT2", NULL, "Mic Bias"},
124	{"Mic Bias", NULL, "Mic Jack"},
125};
126
127/*
128 * Logic for a wm8750 as connected on a Z2 Device
129 */
130static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
131{
132	int ret;
133
134	/* Jack detection API stuff */
135	ret = snd_soc_card_jack_new(rtd->card, "Headset Jack", SND_JACK_HEADSET,
136				    &hs_jack, hs_jack_pins,
137				    ARRAY_SIZE(hs_jack_pins));
138	if (ret)
139		goto err;
140
141	ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
142				hs_jack_gpios);
143	if (ret)
144		goto err;
145
146	return 0;
147
148err:
149	return ret;
150}
151
152static const struct snd_soc_ops z2_ops = {
153	.hw_params = z2_hw_params,
154};
155
156/* z2 digital audio interface glue - connects codec <--> CPU */
157SND_SOC_DAILINK_DEFS(wm8750,
158	DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
159	DAILINK_COMP_ARRAY(COMP_CODEC("wm8750.0-001b", "wm8750-hifi")),
160	DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
161
162static struct snd_soc_dai_link z2_dai = {
163	.name		= "wm8750",
164	.stream_name	= "WM8750",
165	.init		= z2_wm8750_init,
166	.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
167			  SND_SOC_DAIFMT_CBS_CFS,
168	.ops		= &z2_ops,
169	SND_SOC_DAILINK_REG(wm8750),
170};
171
172/* z2 audio machine driver */
173static struct snd_soc_card snd_soc_z2 = {
174	.name		= "Z2",
175	.owner		= THIS_MODULE,
176	.dai_link	= &z2_dai,
177	.num_links	= 1,
178
179	.dapm_widgets = wm8750_dapm_widgets,
180	.num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
181	.dapm_routes = z2_audio_map,
182	.num_dapm_routes = ARRAY_SIZE(z2_audio_map),
183	.fully_routed = true,
184};
185
186static struct platform_device *z2_snd_device;
187
188static int __init z2_init(void)
189{
190	int ret;
191
192	if (!machine_is_zipit2())
193		return -ENODEV;
194
195	z2_snd_device = platform_device_alloc("soc-audio", -1);
196	if (!z2_snd_device)
197		return -ENOMEM;
198
199	platform_set_drvdata(z2_snd_device, &snd_soc_z2);
200	ret = platform_device_add(z2_snd_device);
201
202	if (ret)
203		platform_device_put(z2_snd_device);
204
205	return ret;
206}
207
208static void __exit z2_exit(void)
209{
210	platform_device_unregister(z2_snd_device);
211}
212
213module_init(z2_init);
214module_exit(z2_exit);
215
216MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, "
217		"Marek Vasut <marek.vasut@gmail.com>");
218MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
219MODULE_LICENSE("GPL");