Linux 2.6.37-rc1
[pandora-kernel.git] / sound / soc / codecs / jz4740.c
1 /*
2  * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  *
8  *  You should have received a copy of the  GNU General Public License along
9  *  with this program; if not, write  to the Free Software Foundation, Inc.,
10  *  675 Mass Ave, Cambridge, MA 02139, USA.
11  *
12  */
13
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/platform_device.h>
17 #include <linux/slab.h>
18
19 #include <linux/delay.h>
20
21 #include <sound/core.h>
22 #include <sound/pcm.h>
23 #include <sound/pcm_params.h>
24 #include <sound/initval.h>
25 #include <sound/soc-dapm.h>
26 #include <sound/soc.h>
27
28 #define JZ4740_REG_CODEC_1 0x0
29 #define JZ4740_REG_CODEC_2 0x1
30
31 #define JZ4740_CODEC_1_LINE_ENABLE BIT(29)
32 #define JZ4740_CODEC_1_MIC_ENABLE BIT(28)
33 #define JZ4740_CODEC_1_SW1_ENABLE BIT(27)
34 #define JZ4740_CODEC_1_ADC_ENABLE BIT(26)
35 #define JZ4740_CODEC_1_SW2_ENABLE BIT(25)
36 #define JZ4740_CODEC_1_DAC_ENABLE BIT(24)
37 #define JZ4740_CODEC_1_VREF_DISABLE BIT(20)
38 #define JZ4740_CODEC_1_VREF_AMP_DISABLE BIT(19)
39 #define JZ4740_CODEC_1_VREF_PULLDOWN BIT(18)
40 #define JZ4740_CODEC_1_VREF_LOW_CURRENT BIT(17)
41 #define JZ4740_CODEC_1_VREF_HIGH_CURRENT BIT(16)
42 #define JZ4740_CODEC_1_HEADPHONE_DISABLE BIT(14)
43 #define JZ4740_CODEC_1_HEADPHONE_AMP_CHANGE_ANY BIT(13)
44 #define JZ4740_CODEC_1_HEADPHONE_CHARGE BIT(12)
45 #define JZ4740_CODEC_1_HEADPHONE_PULLDOWN (BIT(11) | BIT(10))
46 #define JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M BIT(9)
47 #define JZ4740_CODEC_1_HEADPHONE_POWERDOWN BIT(8)
48 #define JZ4740_CODEC_1_SUSPEND BIT(1)
49 #define JZ4740_CODEC_1_RESET BIT(0)
50
51 #define JZ4740_CODEC_1_LINE_ENABLE_OFFSET 29
52 #define JZ4740_CODEC_1_MIC_ENABLE_OFFSET 28
53 #define JZ4740_CODEC_1_SW1_ENABLE_OFFSET 27
54 #define JZ4740_CODEC_1_ADC_ENABLE_OFFSET 26
55 #define JZ4740_CODEC_1_SW2_ENABLE_OFFSET 25
56 #define JZ4740_CODEC_1_DAC_ENABLE_OFFSET 24
57 #define JZ4740_CODEC_1_HEADPHONE_DISABLE_OFFSET 14
58 #define JZ4740_CODEC_1_HEADPHONE_POWERDOWN_OFFSET 8
59
60 #define JZ4740_CODEC_2_INPUT_VOLUME_MASK                0x1f0000
61 #define JZ4740_CODEC_2_SAMPLE_RATE_MASK                 0x000f00
62 #define JZ4740_CODEC_2_MIC_BOOST_GAIN_MASK              0x000030
63 #define JZ4740_CODEC_2_HEADPHONE_VOLUME_MASK    0x000003
64
65 #define JZ4740_CODEC_2_INPUT_VOLUME_OFFSET              16
66 #define JZ4740_CODEC_2_SAMPLE_RATE_OFFSET                8
67 #define JZ4740_CODEC_2_MIC_BOOST_GAIN_OFFSET     4
68 #define JZ4740_CODEC_2_HEADPHONE_VOLUME_OFFSET   0
69
70 static const uint32_t jz4740_codec_regs[] = {
71         0x021b2302, 0x00170803,
72 };
73
74 struct jz4740_codec {
75         void __iomem *base;
76         struct resource *mem;
77 };
78
79 static unsigned int jz4740_codec_read(struct snd_soc_codec *codec,
80         unsigned int reg)
81 {
82         struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(codec);
83         return readl(jz4740_codec->base + (reg << 2));
84 }
85
86 static int jz4740_codec_write(struct snd_soc_codec *codec, unsigned int reg,
87         unsigned int val)
88 {
89         struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(codec);
90         u32 *cache = codec->reg_cache;
91
92         cache[reg] = val;
93         writel(val, jz4740_codec->base + (reg << 2));
94
95         return 0;
96 }
97
98 static const struct snd_kcontrol_new jz4740_codec_controls[] = {
99         SOC_SINGLE("Master Playback Volume", JZ4740_REG_CODEC_2,
100                         JZ4740_CODEC_2_HEADPHONE_VOLUME_OFFSET, 3, 0),
101         SOC_SINGLE("Master Capture Volume", JZ4740_REG_CODEC_2,
102                         JZ4740_CODEC_2_INPUT_VOLUME_OFFSET, 31, 0),
103         SOC_SINGLE("Master Playback Switch", JZ4740_REG_CODEC_1,
104                         JZ4740_CODEC_1_HEADPHONE_DISABLE_OFFSET, 1, 1),
105         SOC_SINGLE("Mic Capture Volume", JZ4740_REG_CODEC_2,
106                         JZ4740_CODEC_2_MIC_BOOST_GAIN_OFFSET, 3, 0),
107 };
108
109 static const struct snd_kcontrol_new jz4740_codec_output_controls[] = {
110         SOC_DAPM_SINGLE("Bypass Switch", JZ4740_REG_CODEC_1,
111                         JZ4740_CODEC_1_SW1_ENABLE_OFFSET, 1, 0),
112         SOC_DAPM_SINGLE("DAC Switch", JZ4740_REG_CODEC_1,
113                         JZ4740_CODEC_1_SW2_ENABLE_OFFSET, 1, 0),
114 };
115
116 static const struct snd_kcontrol_new jz4740_codec_input_controls[] = {
117         SOC_DAPM_SINGLE("Line Capture Switch", JZ4740_REG_CODEC_1,
118                         JZ4740_CODEC_1_LINE_ENABLE_OFFSET, 1, 0),
119         SOC_DAPM_SINGLE("Mic Capture Switch", JZ4740_REG_CODEC_1,
120                         JZ4740_CODEC_1_MIC_ENABLE_OFFSET, 1, 0),
121 };
122
123 static const struct snd_soc_dapm_widget jz4740_codec_dapm_widgets[] = {
124         SND_SOC_DAPM_ADC("ADC", "Capture", JZ4740_REG_CODEC_1,
125                         JZ4740_CODEC_1_ADC_ENABLE_OFFSET, 0),
126         SND_SOC_DAPM_DAC("DAC", "Playback", JZ4740_REG_CODEC_1,
127                         JZ4740_CODEC_1_DAC_ENABLE_OFFSET, 0),
128
129         SND_SOC_DAPM_MIXER("Output Mixer", JZ4740_REG_CODEC_1,
130                         JZ4740_CODEC_1_HEADPHONE_POWERDOWN_OFFSET, 1,
131                         jz4740_codec_output_controls,
132                         ARRAY_SIZE(jz4740_codec_output_controls)),
133
134         SND_SOC_DAPM_MIXER_NAMED_CTL("Input Mixer", SND_SOC_NOPM, 0, 0,
135                         jz4740_codec_input_controls,
136                         ARRAY_SIZE(jz4740_codec_input_controls)),
137         SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
138
139         SND_SOC_DAPM_OUTPUT("LOUT"),
140         SND_SOC_DAPM_OUTPUT("ROUT"),
141
142         SND_SOC_DAPM_INPUT("MIC"),
143         SND_SOC_DAPM_INPUT("LIN"),
144         SND_SOC_DAPM_INPUT("RIN"),
145 };
146
147 static const struct snd_soc_dapm_route jz4740_codec_dapm_routes[] = {
148         {"Line Input", NULL, "LIN"},
149         {"Line Input", NULL, "RIN"},
150
151         {"Input Mixer", "Line Capture Switch", "Line Input"},
152         {"Input Mixer", "Mic Capture Switch", "MIC"},
153
154         {"ADC", NULL, "Input Mixer"},
155
156         {"Output Mixer", "Bypass Switch", "Input Mixer"},
157         {"Output Mixer", "DAC Switch", "DAC"},
158
159         {"LOUT", NULL, "Output Mixer"},
160         {"ROUT", NULL, "Output Mixer"},
161 };
162
163 static int jz4740_codec_hw_params(struct snd_pcm_substream *substream,
164         struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
165 {
166         uint32_t val;
167         struct snd_soc_pcm_runtime *rtd = substream->private_data;
168         struct snd_soc_codec *codec =rtd->codec;
169
170         switch (params_rate(params)) {
171         case 8000:
172                 val = 0;
173                 break;
174         case 11025:
175                 val = 1;
176                 break;
177         case 12000:
178                 val = 2;
179                 break;
180         case 16000:
181                 val = 3;
182                 break;
183         case 22050:
184                 val = 4;
185                 break;
186         case 24000:
187                 val = 5;
188                 break;
189         case 32000:
190                 val = 6;
191                 break;
192         case 44100:
193                 val = 7;
194                 break;
195         case 48000:
196                 val = 8;
197                 break;
198         default:
199                 return -EINVAL;
200         }
201
202         val <<= JZ4740_CODEC_2_SAMPLE_RATE_OFFSET;
203
204         snd_soc_update_bits(codec, JZ4740_REG_CODEC_2,
205                                 JZ4740_CODEC_2_SAMPLE_RATE_MASK, val);
206
207         return 0;
208 }
209
210 static struct snd_soc_dai_ops jz4740_codec_dai_ops = {
211         .hw_params = jz4740_codec_hw_params,
212 };
213
214 static struct snd_soc_dai_driver jz4740_codec_dai = {
215         .name = "jz4740-hifi",
216         .playback = {
217                 .stream_name = "Playback",
218                 .channels_min = 2,
219                 .channels_max = 2,
220                 .rates = SNDRV_PCM_RATE_8000_48000,
221                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
222         },
223         .capture = {
224                 .stream_name = "Capture",
225                 .channels_min = 2,
226                 .channels_max = 2,
227                 .rates = SNDRV_PCM_RATE_8000_48000,
228                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
229         },
230         .ops = &jz4740_codec_dai_ops,
231         .symmetric_rates = 1,
232 };
233
234 static void jz4740_codec_wakeup(struct snd_soc_codec *codec)
235 {
236         int i;
237         uint32_t *cache = codec->reg_cache;
238
239         snd_soc_update_bits(codec, JZ4740_REG_CODEC_1,
240                 JZ4740_CODEC_1_RESET, JZ4740_CODEC_1_RESET);
241         udelay(2);
242
243         snd_soc_update_bits(codec, JZ4740_REG_CODEC_1,
244                 JZ4740_CODEC_1_SUSPEND | JZ4740_CODEC_1_RESET, 0);
245
246         for (i = 0; i < ARRAY_SIZE(jz4740_codec_regs); ++i)
247                 jz4740_codec_write(codec, i, cache[i]);
248 }
249
250 static int jz4740_codec_set_bias_level(struct snd_soc_codec *codec,
251         enum snd_soc_bias_level level)
252 {
253         unsigned int mask;
254         unsigned int value;
255
256         switch (level) {
257         case SND_SOC_BIAS_ON:
258                 break;
259         case SND_SOC_BIAS_PREPARE:
260                 mask = JZ4740_CODEC_1_VREF_DISABLE |
261                                 JZ4740_CODEC_1_VREF_AMP_DISABLE |
262                                 JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
263                 value = 0;
264
265                 snd_soc_update_bits(codec, JZ4740_REG_CODEC_1, mask, value);
266                 break;
267         case SND_SOC_BIAS_STANDBY:
268                 /* The only way to clear the suspend flag is to reset the codec */
269                 if (codec->bias_level == SND_SOC_BIAS_OFF)
270                         jz4740_codec_wakeup(codec);
271
272                 mask = JZ4740_CODEC_1_VREF_DISABLE |
273                         JZ4740_CODEC_1_VREF_AMP_DISABLE |
274                         JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
275                 value = JZ4740_CODEC_1_VREF_DISABLE |
276                         JZ4740_CODEC_1_VREF_AMP_DISABLE |
277                         JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
278
279                 snd_soc_update_bits(codec, JZ4740_REG_CODEC_1, mask, value);
280                 break;
281         case SND_SOC_BIAS_OFF:
282                 mask = JZ4740_CODEC_1_SUSPEND;
283                 value = JZ4740_CODEC_1_SUSPEND;
284
285                 snd_soc_update_bits(codec, JZ4740_REG_CODEC_1, mask, value);
286                 break;
287         default:
288                 break;
289         }
290
291         codec->bias_level = level;
292
293         return 0;
294 }
295
296 static int jz4740_codec_dev_probe(struct snd_soc_codec *codec)
297 {
298         snd_soc_update_bits(codec, JZ4740_REG_CODEC_1,
299                         JZ4740_CODEC_1_SW2_ENABLE, JZ4740_CODEC_1_SW2_ENABLE);
300
301         snd_soc_add_controls(codec, jz4740_codec_controls,
302                 ARRAY_SIZE(jz4740_codec_controls));
303
304         snd_soc_dapm_new_controls(codec, jz4740_codec_dapm_widgets,
305                 ARRAY_SIZE(jz4740_codec_dapm_widgets));
306
307         snd_soc_dapm_add_routes(codec, jz4740_codec_dapm_routes,
308                 ARRAY_SIZE(jz4740_codec_dapm_routes));
309
310         snd_soc_dapm_new_widgets(codec);
311
312         jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
313
314         return 0;
315 }
316
317 static int jz4740_codec_dev_remove(struct snd_soc_codec *codec)
318 {
319         jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_OFF);
320
321         return 0;
322 }
323
324 #ifdef CONFIG_PM_SLEEP
325
326 static int jz4740_codec_suspend(struct snd_soc_codec *codec, pm_message_t state)
327 {
328         return jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_OFF);
329 }
330
331 static int jz4740_codec_resume(struct snd_soc_codec *codec)
332 {
333         return jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
334 }
335
336 #else
337 #define jz4740_codec_suspend NULL
338 #define jz4740_codec_resume NULL
339 #endif
340
341 static struct snd_soc_codec_driver soc_codec_dev_jz4740_codec = {
342         .probe = jz4740_codec_dev_probe,
343         .remove = jz4740_codec_dev_remove,
344         .suspend = jz4740_codec_suspend,
345         .resume = jz4740_codec_resume,
346         .read = jz4740_codec_read,
347         .write = jz4740_codec_write,
348         .set_bias_level = jz4740_codec_set_bias_level,
349         .reg_cache_default      = jz4740_codec_regs,
350         .reg_word_size = sizeof(u32),
351         .reg_cache_size = 2,
352 };
353
354 static int __devinit jz4740_codec_probe(struct platform_device *pdev)
355 {
356         int ret;
357         struct jz4740_codec *jz4740_codec;
358         struct resource *mem;
359
360         jz4740_codec = kzalloc(sizeof(*jz4740_codec), GFP_KERNEL);
361         if (!jz4740_codec)
362                 return -ENOMEM;
363
364         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
365         if (!mem) {
366                 dev_err(&pdev->dev, "Failed to get mmio memory resource\n");
367                 ret = -ENOENT;
368                 goto err_free_codec;
369         }
370
371         mem = request_mem_region(mem->start, resource_size(mem), pdev->name);
372         if (!mem) {
373                 dev_err(&pdev->dev, "Failed to request mmio memory region\n");
374                 ret = -EBUSY;
375                 goto err_free_codec;
376         }
377
378         jz4740_codec->base = ioremap(mem->start, resource_size(mem));
379         if (!jz4740_codec->base) {
380                 dev_err(&pdev->dev, "Failed to ioremap mmio memory\n");
381                 ret = -EBUSY;
382                 goto err_release_mem_region;
383         }
384         jz4740_codec->mem = mem;
385
386         platform_set_drvdata(pdev, jz4740_codec);
387
388         ret = snd_soc_register_codec(&pdev->dev,
389                         &soc_codec_dev_jz4740_codec, &jz4740_codec_dai, 1);
390         if (ret) {
391                 dev_err(&pdev->dev, "Failed to register codec\n");
392                 goto err_iounmap;
393         }
394
395         return 0;
396
397 err_iounmap:
398         iounmap(jz4740_codec->base);
399 err_release_mem_region:
400         release_mem_region(mem->start, resource_size(mem));
401 err_free_codec:
402         kfree(jz4740_codec);
403
404         return ret;
405 }
406
407 static int __devexit jz4740_codec_remove(struct platform_device *pdev)
408 {
409         struct jz4740_codec *jz4740_codec = platform_get_drvdata(pdev);
410         struct resource *mem = jz4740_codec->mem;
411
412         snd_soc_unregister_codec(&pdev->dev);
413
414         iounmap(jz4740_codec->base);
415         release_mem_region(mem->start, resource_size(mem));
416
417         platform_set_drvdata(pdev, NULL);
418         kfree(jz4740_codec);
419
420         return 0;
421 }
422
423 static struct platform_driver jz4740_codec_driver = {
424         .probe = jz4740_codec_probe,
425         .remove = __devexit_p(jz4740_codec_remove),
426         .driver = {
427                 .name = "jz4740-codec",
428                 .owner = THIS_MODULE,
429         },
430 };
431
432 static int __init jz4740_codec_init(void)
433 {
434         return platform_driver_register(&jz4740_codec_driver);
435 }
436 module_init(jz4740_codec_init);
437
438 static void __exit jz4740_codec_exit(void)
439 {
440         platform_driver_unregister(&jz4740_codec_driver);
441 }
442 module_exit(jz4740_codec_exit);
443
444 MODULE_DESCRIPTION("JZ4740 SoC internal codec driver");
445 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
446 MODULE_LICENSE("GPL v2");
447 MODULE_ALIAS("platform:jz4740-codec");