1/*
2 * h1940-uda1380.c  --  ALSA Soc Audio Layer
3 *
4 * Copyright (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
5 * Copyright (c) 2010 Vasily Khoruzhick <anarsoul@gmail.com>
6 *
7 * Based on version from Arnaud Patard <arnaud.patard@rtp-net.org>
8 *
9 * This program is free software; you can redistribute  it and/or modify it
10 * under  the terms of  the GNU General  Public License as published by the
11 * Free Software Foundation;  either version 2 of the  License, or (at your
12 * option) any later version.
13 *
14 */
15
16#include <linux/types.h>
17#include <linux/gpio.h>
18#include <linux/module.h>
19
20#include <sound/soc.h>
21#include <sound/jack.h>
22
23#include "regs-iis.h"
24#include <asm/mach-types.h>
25
26#include <mach/gpio-samsung.h>
27#include "s3c24xx-i2s.h"
28
29static unsigned int rates[] = {
30	11025,
31	22050,
32	44100,
33};
34
35static struct snd_pcm_hw_constraint_list hw_rates = {
36	.count = ARRAY_SIZE(rates),
37	.list = rates,
38	.mask = 0,
39};
40
41static struct snd_soc_jack hp_jack;
42
43static struct snd_soc_jack_pin hp_jack_pins[] = {
44	{
45		.pin	= "Headphone Jack",
46		.mask	= SND_JACK_HEADPHONE,
47	},
48	{
49		.pin	= "Speaker",
50		.mask	= SND_JACK_HEADPHONE,
51		.invert	= 1,
52	},
53};
54
55static struct snd_soc_jack_gpio hp_jack_gpios[] = {
56	{
57		.gpio			= S3C2410_GPG(4),
58		.name			= "hp-gpio",
59		.report			= SND_JACK_HEADPHONE,
60		.invert			= 1,
61		.debounce_time		= 200,
62	},
63};
64
65static int h1940_startup(struct snd_pcm_substream *substream)
66{
67	struct snd_pcm_runtime *runtime = substream->runtime;
68
69	return snd_pcm_hw_constraint_list(runtime, 0,
70					SNDRV_PCM_HW_PARAM_RATE,
71					&hw_rates);
72}
73
74static int h1940_hw_params(struct snd_pcm_substream *substream,
75				struct snd_pcm_hw_params *params)
76{
77	struct snd_soc_pcm_runtime *rtd = substream->private_data;
78	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
79	int div;
80	int ret;
81	unsigned int rate = params_rate(params);
82
83	switch (rate) {
84	case 11025:
85	case 22050:
86	case 44100:
87		div = s3c24xx_i2s_get_clockrate() / (384 * rate);
88		if (s3c24xx_i2s_get_clockrate() % (384 * rate) > (192 * rate))
89			div++;
90		break;
91	default:
92		dev_err(rtd->dev, "%s: rate %d is not supported\n",
93			__func__, rate);
94		return -EINVAL;
95	}
96
97	/* select clock source */
98	ret = snd_soc_dai_set_sysclk(cpu_dai, S3C24XX_CLKSRC_PCLK, rate,
99			SND_SOC_CLOCK_OUT);
100	if (ret < 0)
101		return ret;
102
103	/* set MCLK division for sample rate */
104	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
105		S3C2410_IISMOD_384FS);
106	if (ret < 0)
107		return ret;
108
109	/* set BCLK division for sample rate */
110	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
111		S3C2410_IISMOD_32FS);
112	if (ret < 0)
113		return ret;
114
115	/* set prescaler division for sample rate */
116	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
117		S3C24XX_PRESCALE(div, div));
118	if (ret < 0)
119		return ret;
120
121	return 0;
122}
123
124static struct snd_soc_ops h1940_ops = {
125	.startup	= h1940_startup,
126	.hw_params	= h1940_hw_params,
127};
128
129static int h1940_spk_power(struct snd_soc_dapm_widget *w,
130				struct snd_kcontrol *kcontrol, int event)
131{
132	if (SND_SOC_DAPM_EVENT_ON(event))
133		gpio_set_value(S3C_GPIO_END + 9, 1);
134	else
135		gpio_set_value(S3C_GPIO_END + 9, 0);
136
137	return 0;
138}
139
140/* h1940 machine dapm widgets */
141static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
142	SND_SOC_DAPM_HP("Headphone Jack", NULL),
143	SND_SOC_DAPM_MIC("Mic Jack", NULL),
144	SND_SOC_DAPM_SPK("Speaker", h1940_spk_power),
145};
146
147/* h1940 machine audio_map */
148static const struct snd_soc_dapm_route audio_map[] = {
149	/* headphone connected to VOUTLHP, VOUTRHP */
150	{"Headphone Jack", NULL, "VOUTLHP"},
151	{"Headphone Jack", NULL, "VOUTRHP"},
152
153	/* ext speaker connected to VOUTL, VOUTR  */
154	{"Speaker", NULL, "VOUTL"},
155	{"Speaker", NULL, "VOUTR"},
156
157	/* mic is connected to VINM */
158	{"VINM", NULL, "Mic Jack"},
159};
160
161static struct platform_device *s3c24xx_snd_device;
162
163static int h1940_uda1380_init(struct snd_soc_pcm_runtime *rtd)
164{
165	snd_soc_card_jack_new(rtd->card, "Headphone Jack", SND_JACK_HEADPHONE,
166		&hp_jack, hp_jack_pins, ARRAY_SIZE(hp_jack_pins));
167
168	snd_soc_jack_add_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
169		hp_jack_gpios);
170
171	return 0;
172}
173
174static int h1940_uda1380_card_remove(struct snd_soc_card *card)
175{
176	snd_soc_jack_free_gpios(&hp_jack, ARRAY_SIZE(hp_jack_gpios),
177		hp_jack_gpios);
178
179	return 0;
180}
181
182/* s3c24xx digital audio interface glue - connects codec <--> CPU */
183static struct snd_soc_dai_link h1940_uda1380_dai[] = {
184	{
185		.name		= "uda1380",
186		.stream_name	= "UDA1380 Duplex",
187		.cpu_dai_name	= "s3c24xx-iis",
188		.codec_dai_name	= "uda1380-hifi",
189		.init		= h1940_uda1380_init,
190		.platform_name	= "s3c24xx-iis",
191		.codec_name	= "uda1380-codec.0-001a",
192		.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
193				  SND_SOC_DAIFMT_CBS_CFS,
194		.ops		= &h1940_ops,
195	},
196};
197
198static struct snd_soc_card h1940_asoc = {
199	.name = "h1940",
200	.owner = THIS_MODULE,
201	.remove = h1940_uda1380_card_remove,
202	.dai_link = h1940_uda1380_dai,
203	.num_links = ARRAY_SIZE(h1940_uda1380_dai),
204
205	.dapm_widgets = uda1380_dapm_widgets,
206	.num_dapm_widgets = ARRAY_SIZE(uda1380_dapm_widgets),
207	.dapm_routes = audio_map,
208	.num_dapm_routes = ARRAY_SIZE(audio_map),
209};
210
211static int __init h1940_init(void)
212{
213	int ret;
214
215	if (!machine_is_h1940())
216		return -ENODEV;
217
218	/* configure some gpios */
219	ret = gpio_request(S3C_GPIO_END + 9, "speaker-power");
220	if (ret)
221		goto err_out;
222
223	ret = gpio_direction_output(S3C_GPIO_END + 9, 0);
224	if (ret)
225		goto err_gpio;
226
227	s3c24xx_snd_device = platform_device_alloc("soc-audio", -1);
228	if (!s3c24xx_snd_device) {
229		ret = -ENOMEM;
230		goto err_gpio;
231	}
232
233	platform_set_drvdata(s3c24xx_snd_device, &h1940_asoc);
234	ret = platform_device_add(s3c24xx_snd_device);
235
236	if (ret)
237		goto err_plat;
238
239	return 0;
240
241err_plat:
242	platform_device_put(s3c24xx_snd_device);
243err_gpio:
244	gpio_free(S3C_GPIO_END + 9);
245
246err_out:
247	return ret;
248}
249
250static void __exit h1940_exit(void)
251{
252	platform_device_unregister(s3c24xx_snd_device);
253	gpio_free(S3C_GPIO_END + 9);
254}
255
256module_init(h1940_init);
257module_exit(h1940_exit);
258
259/* Module information */
260MODULE_AUTHOR("Arnaud Patard, Vasily Khoruzhick");
261MODULE_DESCRIPTION("ALSA SoC H1940");
262MODULE_LICENSE("GPL");
263