1/*
2 * n810.c  --  SoC audio for Nokia N810
3 *
4 * Copyright (C) 2008 Nokia Corporation
5 *
6 * Contact: Jarkko Nikula <jarkko.nikula@bitmer.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 *
22 */
23
24#include <linux/clk.h>
25#include <linux/i2c.h>
26#include <linux/platform_device.h>
27#include <sound/core.h>
28#include <sound/pcm.h>
29#include <sound/soc.h>
30
31#include <asm/mach-types.h>
32#include <linux/gpio.h>
33#include <linux/module.h>
34#include <linux/platform_data/asoc-ti-mcbsp.h>
35
36#include "omap-mcbsp.h"
37
38#define N810_HEADSET_AMP_GPIO	10
39#define N810_SPEAKER_AMP_GPIO	101
40
41enum {
42	N810_JACK_DISABLED,
43	N810_JACK_HP,
44	N810_JACK_HS,
45	N810_JACK_MIC,
46};
47
48static struct clk *sys_clkout2;
49static struct clk *sys_clkout2_src;
50static struct clk *func96m_clk;
51
52static int n810_spk_func;
53static int n810_jack_func;
54static int n810_dmic_func;
55
56static void n810_ext_control(struct snd_soc_dapm_context *dapm)
57{
58	int hp = 0, line1l = 0;
59
60	switch (n810_jack_func) {
61	case N810_JACK_HS:
62		line1l = 1;
63	case N810_JACK_HP:
64		hp = 1;
65		break;
66	case N810_JACK_MIC:
67		line1l = 1;
68		break;
69	}
70
71	snd_soc_dapm_mutex_lock(dapm);
72
73	if (n810_spk_func)
74		snd_soc_dapm_enable_pin_unlocked(dapm, "Ext Spk");
75	else
76		snd_soc_dapm_disable_pin_unlocked(dapm, "Ext Spk");
77
78	if (hp)
79		snd_soc_dapm_enable_pin_unlocked(dapm, "Headphone Jack");
80	else
81		snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
82	if (line1l)
83		snd_soc_dapm_enable_pin_unlocked(dapm, "LINE1L");
84	else
85		snd_soc_dapm_disable_pin_unlocked(dapm, "LINE1L");
86
87	if (n810_dmic_func)
88		snd_soc_dapm_enable_pin_unlocked(dapm, "DMic");
89	else
90		snd_soc_dapm_disable_pin_unlocked(dapm, "DMic");
91
92	snd_soc_dapm_sync_unlocked(dapm);
93
94	snd_soc_dapm_mutex_unlock(dapm);
95}
96
97static int n810_startup(struct snd_pcm_substream *substream)
98{
99	struct snd_pcm_runtime *runtime = substream->runtime;
100	struct snd_soc_pcm_runtime *rtd = substream->private_data;
101
102	snd_pcm_hw_constraint_minmax(runtime,
103				     SNDRV_PCM_HW_PARAM_CHANNELS, 2, 2);
104
105	n810_ext_control(&rtd->card->dapm);
106	return clk_prepare_enable(sys_clkout2);
107}
108
109static void n810_shutdown(struct snd_pcm_substream *substream)
110{
111	clk_disable_unprepare(sys_clkout2);
112}
113
114static int n810_hw_params(struct snd_pcm_substream *substream,
115	struct snd_pcm_hw_params *params)
116{
117	struct snd_soc_pcm_runtime *rtd = substream->private_data;
118	struct snd_soc_dai *codec_dai = rtd->codec_dai;
119	int err;
120
121	/* Set the codec system clock for DAC and ADC */
122	err = snd_soc_dai_set_sysclk(codec_dai, 0, 12000000,
123					    SND_SOC_CLOCK_IN);
124
125	return err;
126}
127
128static struct snd_soc_ops n810_ops = {
129	.startup = n810_startup,
130	.hw_params = n810_hw_params,
131	.shutdown = n810_shutdown,
132};
133
134static int n810_get_spk(struct snd_kcontrol *kcontrol,
135			struct snd_ctl_elem_value *ucontrol)
136{
137	ucontrol->value.integer.value[0] = n810_spk_func;
138
139	return 0;
140}
141
142static int n810_set_spk(struct snd_kcontrol *kcontrol,
143			struct snd_ctl_elem_value *ucontrol)
144{
145	struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);
146
147	if (n810_spk_func == ucontrol->value.integer.value[0])
148		return 0;
149
150	n810_spk_func = ucontrol->value.integer.value[0];
151	n810_ext_control(&card->dapm);
152
153	return 1;
154}
155
156static int n810_get_jack(struct snd_kcontrol *kcontrol,
157			 struct snd_ctl_elem_value *ucontrol)
158{
159	ucontrol->value.integer.value[0] = n810_jack_func;
160
161	return 0;
162}
163
164static int n810_set_jack(struct snd_kcontrol *kcontrol,
165			 struct snd_ctl_elem_value *ucontrol)
166{
167	struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);
168
169	if (n810_jack_func == ucontrol->value.integer.value[0])
170		return 0;
171
172	n810_jack_func = ucontrol->value.integer.value[0];
173	n810_ext_control(&card->dapm);
174
175	return 1;
176}
177
178static int n810_get_input(struct snd_kcontrol *kcontrol,
179			  struct snd_ctl_elem_value *ucontrol)
180{
181	ucontrol->value.integer.value[0] = n810_dmic_func;
182
183	return 0;
184}
185
186static int n810_set_input(struct snd_kcontrol *kcontrol,
187			  struct snd_ctl_elem_value *ucontrol)
188{
189	struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);
190
191	if (n810_dmic_func == ucontrol->value.integer.value[0])
192		return 0;
193
194	n810_dmic_func = ucontrol->value.integer.value[0];
195	n810_ext_control(&card->dapm);
196
197	return 1;
198}
199
200static int n810_spk_event(struct snd_soc_dapm_widget *w,
201			  struct snd_kcontrol *k, int event)
202{
203	if (SND_SOC_DAPM_EVENT_ON(event))
204		gpio_set_value(N810_SPEAKER_AMP_GPIO, 1);
205	else
206		gpio_set_value(N810_SPEAKER_AMP_GPIO, 0);
207
208	return 0;
209}
210
211static int n810_jack_event(struct snd_soc_dapm_widget *w,
212			   struct snd_kcontrol *k, int event)
213{
214	if (SND_SOC_DAPM_EVENT_ON(event))
215		gpio_set_value(N810_HEADSET_AMP_GPIO, 1);
216	else
217		gpio_set_value(N810_HEADSET_AMP_GPIO, 0);
218
219	return 0;
220}
221
222static const struct snd_soc_dapm_widget aic33_dapm_widgets[] = {
223	SND_SOC_DAPM_SPK("Ext Spk", n810_spk_event),
224	SND_SOC_DAPM_HP("Headphone Jack", n810_jack_event),
225	SND_SOC_DAPM_MIC("DMic", NULL),
226};
227
228static const struct snd_soc_dapm_route audio_map[] = {
229	{"Headphone Jack", NULL, "HPLOUT"},
230	{"Headphone Jack", NULL, "HPROUT"},
231
232	{"Ext Spk", NULL, "LLOUT"},
233	{"Ext Spk", NULL, "RLOUT"},
234
235	{"DMic Rate 64", NULL, "Mic Bias"},
236	{"Mic Bias", NULL, "DMic"},
237};
238
239static const char *spk_function[] = {"Off", "On"};
240static const char *jack_function[] = {"Off", "Headphone", "Headset", "Mic"};
241static const char *input_function[] = {"ADC", "Digital Mic"};
242static const struct soc_enum n810_enum[] = {
243	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(spk_function), spk_function),
244	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(jack_function), jack_function),
245	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(input_function), input_function),
246};
247
248static const struct snd_kcontrol_new aic33_n810_controls[] = {
249	SOC_ENUM_EXT("Speaker Function", n810_enum[0],
250		     n810_get_spk, n810_set_spk),
251	SOC_ENUM_EXT("Jack Function", n810_enum[1],
252		     n810_get_jack, n810_set_jack),
253	SOC_ENUM_EXT("Input Select",  n810_enum[2],
254		     n810_get_input, n810_set_input),
255};
256
257/* Digital audio interface glue - connects codec <--> CPU */
258static struct snd_soc_dai_link n810_dai = {
259	.name = "TLV320AIC33",
260	.stream_name = "AIC33",
261	.cpu_dai_name = "omap-mcbsp.2",
262	.platform_name = "omap-mcbsp.2",
263	.codec_name = "tlv320aic3x-codec.2-0018",
264	.codec_dai_name = "tlv320aic3x-hifi",
265	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
266		   SND_SOC_DAIFMT_CBM_CFM,
267	.ops = &n810_ops,
268};
269
270/* Audio machine driver */
271static struct snd_soc_card snd_soc_n810 = {
272	.name = "N810",
273	.owner = THIS_MODULE,
274	.dai_link = &n810_dai,
275	.num_links = 1,
276
277	.controls = aic33_n810_controls,
278	.num_controls = ARRAY_SIZE(aic33_n810_controls),
279	.dapm_widgets = aic33_dapm_widgets,
280	.num_dapm_widgets = ARRAY_SIZE(aic33_dapm_widgets),
281	.dapm_routes = audio_map,
282	.num_dapm_routes = ARRAY_SIZE(audio_map),
283	.fully_routed = true,
284};
285
286static struct platform_device *n810_snd_device;
287
288static int __init n810_soc_init(void)
289{
290	int err;
291	struct device *dev;
292
293	if (!of_have_populated_dt() ||
294	    (!of_machine_is_compatible("nokia,n810") &&
295	     !of_machine_is_compatible("nokia,n810-wimax")))
296		return -ENODEV;
297
298	n810_snd_device = platform_device_alloc("soc-audio", -1);
299	if (!n810_snd_device)
300		return -ENOMEM;
301
302	platform_set_drvdata(n810_snd_device, &snd_soc_n810);
303	err = platform_device_add(n810_snd_device);
304	if (err)
305		goto err1;
306
307	dev = &n810_snd_device->dev;
308
309	sys_clkout2_src = clk_get(dev, "sys_clkout2_src");
310	if (IS_ERR(sys_clkout2_src)) {
311		dev_err(dev, "Could not get sys_clkout2_src clock\n");
312		err = PTR_ERR(sys_clkout2_src);
313		goto err2;
314	}
315	sys_clkout2 = clk_get(dev, "sys_clkout2");
316	if (IS_ERR(sys_clkout2)) {
317		dev_err(dev, "Could not get sys_clkout2\n");
318		err = PTR_ERR(sys_clkout2);
319		goto err3;
320	}
321	/*
322	 * Configure 12 MHz output on SYS_CLKOUT2. Therefore we must use
323	 * 96 MHz as its parent in order to get 12 MHz
324	 */
325	func96m_clk = clk_get(dev, "func_96m_ck");
326	if (IS_ERR(func96m_clk)) {
327		dev_err(dev, "Could not get func 96M clock\n");
328		err = PTR_ERR(func96m_clk);
329		goto err4;
330	}
331	clk_set_parent(sys_clkout2_src, func96m_clk);
332	clk_set_rate(sys_clkout2, 12000000);
333
334	if (WARN_ON((gpio_request(N810_HEADSET_AMP_GPIO, "hs_amp") < 0) ||
335		    (gpio_request(N810_SPEAKER_AMP_GPIO, "spk_amp") < 0))) {
336		err = -EINVAL;
337		goto err4;
338	}
339
340	gpio_direction_output(N810_HEADSET_AMP_GPIO, 0);
341	gpio_direction_output(N810_SPEAKER_AMP_GPIO, 0);
342
343	return 0;
344err4:
345	clk_put(sys_clkout2);
346err3:
347	clk_put(sys_clkout2_src);
348err2:
349	platform_device_del(n810_snd_device);
350err1:
351	platform_device_put(n810_snd_device);
352
353	return err;
354}
355
356static void __exit n810_soc_exit(void)
357{
358	gpio_free(N810_SPEAKER_AMP_GPIO);
359	gpio_free(N810_HEADSET_AMP_GPIO);
360	clk_put(sys_clkout2_src);
361	clk_put(sys_clkout2);
362	clk_put(func96m_clk);
363
364	platform_device_unregister(n810_snd_device);
365}
366
367module_init(n810_soc_init);
368module_exit(n810_soc_exit);
369
370MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@bitmer.com>");
371MODULE_DESCRIPTION("ALSA SoC Nokia N810");
372MODULE_LICENSE("GPL");
373