1/*
  2 * linux/sound/soc/pxa/z2.c
  3 *
  4 * SoC Audio driver for Aeronix Zipit Z2
  5 *
  6 * Copyright (C) 2009 Ken McGuire <kenm@desertweyr.com>
  7 * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
  8 *
  9 * This program is free software; you can redistribute it and/or modify
 10 * it under the terms of the GNU General Public License version 2 as
 11 * published by the Free Software Foundation.
 12 */
 13
 14#include <linux/module.h>
 15#include <linux/moduleparam.h>
 16#include <linux/timer.h>
 17#include <linux/interrupt.h>
 18#include <linux/platform_device.h>
 19#include <linux/gpio.h>
 20
 21#include <sound/core.h>
 22#include <sound/pcm.h>
 23#include <sound/soc.h>
 24#include <sound/jack.h>
 25
 26#include <asm/mach-types.h>
 27#include <mach/hardware.h>
 28#include <mach/audio.h>
 29#include <mach/z2.h>
 30
 31#include "../codecs/wm8750.h"
 32#include "pxa2xx-i2s.h"
 33
 34static struct snd_soc_card snd_soc_z2;
 35
 36static int z2_hw_params(struct snd_pcm_substream *substream,
 37	struct snd_pcm_hw_params *params)
 38{
 39	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 40	struct snd_soc_dai *codec_dai = rtd->codec_dai;
 41	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 42	unsigned int clk = 0;
 43	int ret = 0;
 44
 45	switch (params_rate(params)) {
 46	case 8000:
 47	case 16000:
 48	case 48000:
 49	case 96000:
 50		clk = 12288000;
 51		break;
 52	case 11025:
 53	case 22050:
 54	case 44100:
 55		clk = 11289600;
 56		break;
 57	}
 58
 59	/* set the codec system clock for DAC and ADC */
 60	ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
 61		SND_SOC_CLOCK_IN);
 62	if (ret < 0)
 63		return ret;
 64
 65	/* set the I2S system clock as input (unused) */
 66	ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 67		SND_SOC_CLOCK_IN);
 68	if (ret < 0)
 69		return ret;
 70
 71	return 0;
 72}
 73
 74static struct snd_soc_jack hs_jack;
 75
 76/* Headset jack detection DAPM pins */
 77static struct snd_soc_jack_pin hs_jack_pins[] = {
 78	{
 79		.pin	= "Mic Jack",
 80		.mask	= SND_JACK_MICROPHONE,
 81	},
 82	{
 83		.pin	= "Headphone Jack",
 84		.mask	= SND_JACK_HEADPHONE,
 85	},
 86	{
 87		.pin    = "Ext Spk",
 88		.mask   = SND_JACK_HEADPHONE,
 89		.invert = 1
 90	},
 91};
 92
 93/* Headset jack detection gpios */
 94static struct snd_soc_jack_gpio hs_jack_gpios[] = {
 95	{
 96		.gpio		= GPIO37_ZIPITZ2_HEADSET_DETECT,
 97		.name		= "hsdet-gpio",
 98		.report		= SND_JACK_HEADSET,
 99		.debounce_time	= 200,
100		.invert		= 1,
101	},
102};
103
104/* z2 machine dapm widgets */
105static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
106	SND_SOC_DAPM_HP("Headphone Jack", NULL),
107	SND_SOC_DAPM_MIC("Mic Jack", NULL),
108	SND_SOC_DAPM_SPK("Ext Spk", NULL),
109
110	/* headset is a mic and mono headphone */
111	SND_SOC_DAPM_HP("Headset Jack", NULL),
112};
113
114/* Z2 machine audio_map */
115static const struct snd_soc_dapm_route z2_audio_map[] = {
116
117	/* headphone connected to LOUT1, ROUT1 */
118	{"Headphone Jack", NULL, "LOUT1"},
119	{"Headphone Jack", NULL, "ROUT1"},
120
121	/* ext speaker connected to LOUT2, ROUT2  */
122	{"Ext Spk", NULL , "ROUT2"},
123	{"Ext Spk", NULL , "LOUT2"},
124
125	/* mic is connected to R input 2 - with bias */
126	{"RINPUT2", NULL, "Mic Bias"},
127	{"Mic Bias", NULL, "Mic Jack"},
128};
129
130/*
131 * Logic for a wm8750 as connected on a Z2 Device
132 */
133static int z2_wm8750_init(struct snd_soc_pcm_runtime *rtd)
134{
135	int ret;
136
137	/* Jack detection API stuff */
138	ret = snd_soc_card_jack_new(rtd->card, "Headset Jack", SND_JACK_HEADSET,
139				    &hs_jack, hs_jack_pins,
140				    ARRAY_SIZE(hs_jack_pins));
141	if (ret)
142		goto err;
143
144	ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
145				hs_jack_gpios);
146	if (ret)
147		goto err;
148
149	return 0;
150
151err:
152	return ret;
153}
154
155static struct snd_soc_ops z2_ops = {
156	.hw_params = z2_hw_params,
157};
158
159/* z2 digital audio interface glue - connects codec <--> CPU */
160static struct snd_soc_dai_link z2_dai = {
161	.name		= "wm8750",
162	.stream_name	= "WM8750",
163	.cpu_dai_name	= "pxa2xx-i2s",
164	.codec_dai_name	= "wm8750-hifi",
165	.platform_name = "pxa-pcm-audio",
166	.codec_name	= "wm8750.0-001b",
167	.init		= z2_wm8750_init,
168	.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
169			  SND_SOC_DAIFMT_CBS_CFS,
170	.ops		= &z2_ops,
171};
172
173/* z2 audio machine driver */
174static struct snd_soc_card snd_soc_z2 = {
175	.name		= "Z2",
176	.owner		= THIS_MODULE,
177	.dai_link	= &z2_dai,
178	.num_links	= 1,
179
180	.dapm_widgets = wm8750_dapm_widgets,
181	.num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
182	.dapm_routes = z2_audio_map,
183	.num_dapm_routes = ARRAY_SIZE(z2_audio_map),
184	.fully_routed = true,
185};
186
187static struct platform_device *z2_snd_device;
188
189static int __init z2_init(void)
190{
191	int ret;
192
193	if (!machine_is_zipit2())
194		return -ENODEV;
195
196	z2_snd_device = platform_device_alloc("soc-audio", -1);
197	if (!z2_snd_device)
198		return -ENOMEM;
199
200	platform_set_drvdata(z2_snd_device, &snd_soc_z2);
201	ret = platform_device_add(z2_snd_device);
202
203	if (ret)
204		platform_device_put(z2_snd_device);
205
206	return ret;
207}
208
209static void __exit z2_exit(void)
210{
211	platform_device_unregister(z2_snd_device);
212}
213
214module_init(z2_init);
215module_exit(z2_exit);
216
217MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, "
218		"Marek Vasut <marek.vasut@gmail.com>");
219MODULE_DESCRIPTION("ALSA SoC ZipitZ2");
220MODULE_LICENSE("GPL");