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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
41 enum {
42         N810_JACK_DISABLED,
43         N810_JACK_HP,
44         N810_JACK_HS,
45         N810_JACK_MIC,
46 };
47
48 static struct clk *sys_clkout2;
49 static struct clk *sys_clkout2_src;
50 static struct clk *func96m_clk;
51
52 static int n810_spk_func;
53 static int n810_jack_func;
54 static int n810_dmic_func;
55
56 static 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
97 static 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_single(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2);
103
104         n810_ext_control(&rtd->card->dapm);
105         return clk_prepare_enable(sys_clkout2);
106 }
107
108 static void n810_shutdown(struct snd_pcm_substream *substream)
109 {
110         clk_disable_unprepare(sys_clkout2);
111 }
112
113 static int n810_hw_params(struct snd_pcm_substream *substream,
114         struct snd_pcm_hw_params *params)
115 {
116         struct snd_soc_pcm_runtime *rtd = substream->private_data;
117         struct snd_soc_dai *codec_dai = rtd->codec_dai;
118         int err;
119
120         /* Set the codec system clock for DAC and ADC */
121         err = snd_soc_dai_set_sysclk(codec_dai, 0, 12000000,
122                                             SND_SOC_CLOCK_IN);
123
124         return err;
125 }
126
127 static struct snd_soc_ops n810_ops = {
128         .startup = n810_startup,
129         .hw_params = n810_hw_params,
130         .shutdown = n810_shutdown,
131 };
132
133 static int n810_get_spk(struct snd_kcontrol *kcontrol,
134                         struct snd_ctl_elem_value *ucontrol)
135 {
136         ucontrol->value.integer.value[0] = n810_spk_func;
137
138         return 0;
139 }
140
141 static int n810_set_spk(struct snd_kcontrol *kcontrol,
142                         struct snd_ctl_elem_value *ucontrol)
143 {
144         struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);
145
146         if (n810_spk_func == ucontrol->value.integer.value[0])
147                 return 0;
148
149         n810_spk_func = ucontrol->value.integer.value[0];
150         n810_ext_control(&card->dapm);
151
152         return 1;
153 }
154
155 static int n810_get_jack(struct snd_kcontrol *kcontrol,
156                          struct snd_ctl_elem_value *ucontrol)
157 {
158         ucontrol->value.integer.value[0] = n810_jack_func;
159
160         return 0;
161 }
162
163 static int n810_set_jack(struct snd_kcontrol *kcontrol,
164                          struct snd_ctl_elem_value *ucontrol)
165 {
166         struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);
167
168         if (n810_jack_func == ucontrol->value.integer.value[0])
169                 return 0;
170
171         n810_jack_func = ucontrol->value.integer.value[0];
172         n810_ext_control(&card->dapm);
173
174         return 1;
175 }
176
177 static int n810_get_input(struct snd_kcontrol *kcontrol,
178                           struct snd_ctl_elem_value *ucontrol)
179 {
180         ucontrol->value.integer.value[0] = n810_dmic_func;
181
182         return 0;
183 }
184
185 static int n810_set_input(struct snd_kcontrol *kcontrol,
186                           struct snd_ctl_elem_value *ucontrol)
187 {
188         struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);
189
190         if (n810_dmic_func == ucontrol->value.integer.value[0])
191                 return 0;
192
193         n810_dmic_func = ucontrol->value.integer.value[0];
194         n810_ext_control(&card->dapm);
195
196         return 1;
197 }
198
199 static int n810_spk_event(struct snd_soc_dapm_widget *w,
200                           struct snd_kcontrol *k, int event)
201 {
202         if (SND_SOC_DAPM_EVENT_ON(event))
203                 gpio_set_value(N810_SPEAKER_AMP_GPIO, 1);
204         else
205                 gpio_set_value(N810_SPEAKER_AMP_GPIO, 0);
206
207         return 0;
208 }
209
210 static int n810_jack_event(struct snd_soc_dapm_widget *w,
211                            struct snd_kcontrol *k, int event)
212 {
213         if (SND_SOC_DAPM_EVENT_ON(event))
214                 gpio_set_value(N810_HEADSET_AMP_GPIO, 1);
215         else
216                 gpio_set_value(N810_HEADSET_AMP_GPIO, 0);
217
218         return 0;
219 }
220
221 static const struct snd_soc_dapm_widget aic33_dapm_widgets[] = {
222         SND_SOC_DAPM_SPK("Ext Spk", n810_spk_event),
223         SND_SOC_DAPM_HP("Headphone Jack", n810_jack_event),
224         SND_SOC_DAPM_MIC("DMic", NULL),
225 };
226
227 static const struct snd_soc_dapm_route audio_map[] = {
228         {"Headphone Jack", NULL, "HPLOUT"},
229         {"Headphone Jack", NULL, "HPROUT"},
230
231         {"Ext Spk", NULL, "LLOUT"},
232         {"Ext Spk", NULL, "RLOUT"},
233
234         {"DMic Rate 64", NULL, "Mic Bias"},
235         {"Mic Bias", NULL, "DMic"},
236 };
237
238 static const char *spk_function[] = {"Off", "On"};
239 static const char *jack_function[] = {"Off", "Headphone", "Headset", "Mic"};
240 static const char *input_function[] = {"ADC", "Digital Mic"};
241 static const struct soc_enum n810_enum[] = {
242         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(spk_function), spk_function),
243         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(jack_function), jack_function),
244         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(input_function), input_function),
245 };
246
247 static const struct snd_kcontrol_new aic33_n810_controls[] = {
248         SOC_ENUM_EXT("Speaker Function", n810_enum[0],
249                      n810_get_spk, n810_set_spk),
250         SOC_ENUM_EXT("Jack Function", n810_enum[1],
251                      n810_get_jack, n810_set_jack),
252         SOC_ENUM_EXT("Input Select",  n810_enum[2],
253                      n810_get_input, n810_set_input),
254 };
255
256 /* Digital audio interface glue - connects codec <--> CPU */
257 static struct snd_soc_dai_link n810_dai = {
258         .name = "TLV320AIC33",
259         .stream_name = "AIC33",
260         .cpu_dai_name = "omap-mcbsp.2",
261         .platform_name = "omap-mcbsp.2",
262         .codec_name = "tlv320aic3x-codec.2-0018",
263         .codec_dai_name = "tlv320aic3x-hifi",
264         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
265                    SND_SOC_DAIFMT_CBM_CFM,
266         .ops = &n810_ops,
267 };
268
269 /* Audio machine driver */
270 static struct snd_soc_card snd_soc_n810 = {
271         .name = "N810",
272         .owner = THIS_MODULE,
273         .dai_link = &n810_dai,
274         .num_links = 1,
275
276         .controls = aic33_n810_controls,
277         .num_controls = ARRAY_SIZE(aic33_n810_controls),
278         .dapm_widgets = aic33_dapm_widgets,
279         .num_dapm_widgets = ARRAY_SIZE(aic33_dapm_widgets),
280         .dapm_routes = audio_map,
281         .num_dapm_routes = ARRAY_SIZE(audio_map),
282         .fully_routed = true,
283 };
284
285 static struct platform_device *n810_snd_device;
286
287 static int __init n810_soc_init(void)
288 {
289         int err;
290         struct device *dev;
291
292         if (!of_have_populated_dt() ||
293             (!of_machine_is_compatible("nokia,n810") &&
294              !of_machine_is_compatible("nokia,n810-wimax")))
295                 return -ENODEV;
296
297         n810_snd_device = platform_device_alloc("soc-audio", -1);
298         if (!n810_snd_device)
299                 return -ENOMEM;
300
301         platform_set_drvdata(n810_snd_device, &snd_soc_n810);
302         err = platform_device_add(n810_snd_device);
303         if (err)
304                 goto err1;
305
306         dev = &n810_snd_device->dev;
307
308         sys_clkout2_src = clk_get(dev, "sys_clkout2_src");
309         if (IS_ERR(sys_clkout2_src)) {
310                 dev_err(dev, "Could not get sys_clkout2_src clock\n");
311                 err = PTR_ERR(sys_clkout2_src);
312                 goto err2;
313         }
314         sys_clkout2 = clk_get(dev, "sys_clkout2");
315         if (IS_ERR(sys_clkout2)) {
316                 dev_err(dev, "Could not get sys_clkout2\n");
317                 err = PTR_ERR(sys_clkout2);
318                 goto err3;
319         }
320         /*
321          * Configure 12 MHz output on SYS_CLKOUT2. Therefore we must use
322          * 96 MHz as its parent in order to get 12 MHz
323          */
324         func96m_clk = clk_get(dev, "func_96m_ck");
325         if (IS_ERR(func96m_clk)) {
326                 dev_err(dev, "Could not get func 96M clock\n");
327                 err = PTR_ERR(func96m_clk);
328                 goto err4;
329         }
330         clk_set_parent(sys_clkout2_src, func96m_clk);
331         clk_set_rate(sys_clkout2, 12000000);
332
333         if (WARN_ON((gpio_request(N810_HEADSET_AMP_GPIO, "hs_amp") < 0) ||
334                     (gpio_request(N810_SPEAKER_AMP_GPIO, "spk_amp") < 0))) {
335                 err = -EINVAL;
336                 goto err4;
337         }
338
339         gpio_direction_output(N810_HEADSET_AMP_GPIO, 0);
340         gpio_direction_output(N810_SPEAKER_AMP_GPIO, 0);
341
342         return 0;
343 err4:
344         clk_put(sys_clkout2);
345 err3:
346         clk_put(sys_clkout2_src);
347 err2:
348         platform_device_del(n810_snd_device);
349 err1:
350         platform_device_put(n810_snd_device);
351
352         return err;
353 }
354
355 static void __exit n810_soc_exit(void)
356 {
357         gpio_free(N810_SPEAKER_AMP_GPIO);
358         gpio_free(N810_HEADSET_AMP_GPIO);
359         clk_put(sys_clkout2_src);
360         clk_put(sys_clkout2);
361         clk_put(func96m_clk);
362
363         platform_device_unregister(n810_snd_device);
364 }
365
366 module_init(n810_soc_init);
367 module_exit(n810_soc_exit);
368
369 MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@bitmer.com>");
370 MODULE_DESCRIPTION("ALSA SoC Nokia N810");
371 MODULE_LICENSE("GPL");