summaryrefslogtreecommitdiffstats
path: root/target/linux/xburst/patches-2.6.34/060-jzcodec.patch
blob: 80fed9173f9a362702ff92ee8293836f71ade342 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
From 075550fa667fca846d1217f649438df5cb4f9529 Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Fri, 28 May 2010 19:53:05 +0200
Subject: [PATCH] Add jz4740 codec driver

---
 sound/soc/codecs/Kconfig   |    7 +
 sound/soc/codecs/Makefile  |    2 +
 sound/soc/codecs/jzcodec.c |  513 ++++++++++++++++++++++++++++++++++++++++++++
 sound/soc/codecs/jzcodec.h |   22 ++
 4 files changed, 544 insertions(+), 0 deletions(-)
 create mode 100644 sound/soc/codecs/jzcodec.c
 create mode 100644 sound/soc/codecs/jzcodec.h

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 1743d56..b25598a 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -260,6 +260,13 @@ config SND_SOC_WM9712
 config SND_SOC_WM9713
 	tristate
 
+config SND_SOC_JZCODEC
+	tristate "JZ4720/JZ4740 SoC internal codec"
+	depends on SND_SOC && SOC_JZ4740
+	help
+	  Say Y if you want to use internal codec on Ingenic JZ4720/JZ4740 based
+	  boards.
+
 # Amp
 config SND_SOC_MAX9877
 	tristate
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index dd5ce6d..3f6ce05 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -54,6 +54,7 @@ snd-soc-wm9705-objs := wm9705.o
 snd-soc-wm9712-objs := wm9712.o
 snd-soc-wm9713-objs := wm9713.o
 snd-soc-wm-hubs-objs := wm_hubs.o
+snd-soc-jzcodec-objs := jzcodec.o
 
 # Amp
 snd-soc-max9877-objs := max9877.o
@@ -116,6 +117,7 @@ obj-$(CONFIG_SND_SOC_WM9705)	+= snd-soc-wm9705.o
 obj-$(CONFIG_SND_SOC_WM9712)	+= snd-soc-wm9712.o
 obj-$(CONFIG_SND_SOC_WM9713)	+= snd-soc-wm9713.o
 obj-$(CONFIG_SND_SOC_WM_HUBS)	+= snd-soc-wm-hubs.o
+obj-$(CONFIG_SND_SOC_JZCODEC)	+= snd-soc-jzcodec.o
 
 # Amp
 obj-$(CONFIG_SND_SOC_MAX9877)	+= snd-soc-max9877.o
diff --git a/sound/soc/codecs/jzcodec.c b/sound/soc/codecs/jzcodec.c
new file mode 100644
index 0000000..91720fa
--- /dev/null
+++ b/sound/soc/codecs/jzcodec.c
@@ -0,0 +1,513 @@
+/*
+ * Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <linux/delay.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/soc-dapm.h>
+#include <sound/soc.h>
+
+#define JZ_REG_CODEC_1 0x0
+#define JZ_REG_CODEC_2 0x1
+
+#define JZ_CODEC_1_LINE_ENABLE BIT(29)
+#define JZ_CODEC_1_MIC_ENABLE BIT(28)
+#define JZ_CODEC_1_SW1_ENABLE BIT(27)
+#define JZ_CODEC_1_ADC_ENABLE BIT(26)
+#define JZ_CODEC_1_SW2_ENABLE BIT(25)
+#define JZ_CODEC_1_DAC_ENABLE BIT(24)
+#define JZ_CODEC_1_VREF_DISABLE BIT(20)
+#define JZ_CODEC_1_VREF_AMP_DISABLE BIT(19)
+#define JZ_CODEC_1_VREF_PULL_DOWN BIT(18)
+#define JZ_CODEC_1_VREF_LOW_CURRENT BIT(17)
+#define JZ_CODEC_1_VREF_HIGH_CURRENT BIT(16)
+#define JZ_CODEC_1_HEADPHONE_DISABLE BIT(14)
+#define JZ_CODEC_1_HEADPHONE_AMP_CHANGE_ANY BIT(13)
+#define JZ_CODEC_1_HEADPHONE_CHANGE BIT(12)
+#define JZ_CODEC_1_HEADPHONE_PULL_DOWN_M BIT(11)
+#define JZ_CODEC_1_HEADPHONE_PULL_DOWN_R BIT(10)
+#define JZ_CODEC_1_HEADPHONE_POWER_DOWN_M BIT(9)
+#define JZ_CODEC_1_HEADPHONE_POWER_DOWN BIT(8)
+#define JZ_CODEC_1_SUSPEND BIT(1)
+#define JZ_CODEC_1_RESET BIT(0)
+
+#define JZ_CODEC_1_LINE_ENABLE_OFFSET 29
+#define JZ_CODEC_1_MIC_ENABLE_OFFSET 28
+#define JZ_CODEC_1_SW1_ENABLE_OFFSET 27
+#define JZ_CODEC_1_ADC_ENABLE_OFFSET 26
+#define JZ_CODEC_1_SW2_ENABLE_OFFSET 25
+#define JZ_CODEC_1_DAC_ENABLE_OFFSET 24
+#define JZ_CODEC_1_HEADPHONE_DISABLE_OFFSET 14
+#define JZ_CODEC_1_HEADPHONE_POWER_DOWN_OFFSET 8
+
+#define JZ_CODEC_2_INPUT_VOLUME_MASK		0x1f0000
+#define JZ_CODEC_2_SAMPLE_RATE_MASK			0x000f00
+#define JZ_CODEC_2_MIC_BOOST_GAIN_MASK		0x000030
+#define JZ_CODEC_2_HEADPHONE_VOLUME_MASK	0x000003
+
+#define JZ_CODEC_2_INPUT_VOLUME_OFFSET		16
+#define JZ_CODEC_2_SAMPLE_RATE_OFFSET		 8
+#define JZ_CODEC_2_MIC_BOOST_GAIN_OFFSET	 4
+#define JZ_CODEC_2_HEADPHONE_VOLUME_OFFSET	 0
+
+struct jz_codec {
+	void __iomem *base;
+	struct resource *mem;
+
+	uint32_t reg_cache[2];
+	struct snd_soc_codec codec;
+};
+
+static inline struct jz_codec *codec_to_jz(struct snd_soc_codec *codec)
+{
+	return container_of(codec, struct jz_codec, codec);
+}
+
+static unsigned int jz_codec_read(struct snd_soc_codec *codec, unsigned int reg)
+{
+	struct jz_codec *jz_codec = codec_to_jz(codec);
+	return readl(jz_codec->base + (reg << 2));
+}
+
+static int jz_codec_write(struct snd_soc_codec *codec, unsigned int reg,
+unsigned int val)
+{
+	struct jz_codec *jz_codec = codec_to_jz(codec);
+	jz_codec->reg_cache[reg] = val;
+
+	writel(val, jz_codec->base + (reg << 2));
+	return 0;
+}
+
+static const struct snd_kcontrol_new jz_codec_controls[] = {
+	SOC_SINGLE("Master Playback Volume", JZ_REG_CODEC_2,
+			JZ_CODEC_2_HEADPHONE_VOLUME_OFFSET, 3, 0),
+	SOC_SINGLE("Capture Volume", JZ_REG_CODEC_2,
+			JZ_CODEC_2_INPUT_VOLUME_OFFSET, 31, 0),
+	SOC_SINGLE("Master Playback Switch", JZ_REG_CODEC_1,
+			JZ_CODEC_1_HEADPHONE_DISABLE_OFFSET, 1, 1),
+	SOC_SINGLE("Mic Capture Volume", JZ_REG_CODEC_2,
+			JZ_CODEC_2_MIC_BOOST_GAIN_OFFSET, 3, 0),
+};
+
+static const struct snd_kcontrol_new jz_codec_output_controls[] = {
+	SOC_DAPM_SINGLE("Bypass Switch", JZ_REG_CODEC_1,
+			JZ_CODEC_1_SW1_ENABLE_OFFSET, 1, 0),
+	SOC_DAPM_SINGLE("DAC Switch", JZ_REG_CODEC_1,
+			JZ_CODEC_1_SW2_ENABLE_OFFSET, 1, 0),
+};
+
+static const struct snd_kcontrol_new jz_codec_input_controls[] = {
+	SOC_DAPM_SINGLE("Line Capture Switch", JZ_REG_CODEC_1,
+			JZ_CODEC_1_LINE_ENABLE_OFFSET, 1, 0),
+	SOC_DAPM_SINGLE("Mic Capture Switch", JZ_REG_CODEC_1,
+			JZ_CODEC_1_MIC_ENABLE_OFFSET, 1, 0),
+};
+
+static const struct snd_soc_dapm_widget jz_codec_dapm_widgets[] = {
+	SND_SOC_DAPM_ADC("ADC", "Capture", JZ_REG_CODEC_1,
+			JZ_CODEC_1_ADC_ENABLE_OFFSET, 0),
+	SND_SOC_DAPM_DAC("DAC", "Playback", JZ_REG_CODEC_1,
+			JZ_CODEC_1_DAC_ENABLE_OFFSET, 0),
+
+	SND_SOC_DAPM_MIXER("Output Mixer", JZ_REG_CODEC_1,
+			JZ_CODEC_1_HEADPHONE_POWER_DOWN_OFFSET, 1,
+			jz_codec_output_controls,
+			ARRAY_SIZE(jz_codec_output_controls)),
+
+	SND_SOC_DAPM_MIXER_NAMED_CTL("Input Mixer", SND_SOC_NOPM, 0, 0,
+			jz_codec_input_controls,
+			ARRAY_SIZE(jz_codec_input_controls)),
+	SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
+
+	SND_SOC_DAPM_OUTPUT("LOUT"),
+	SND_SOC_DAPM_OUTPUT("ROUT"),
+
+	SND_SOC_DAPM_INPUT("MIC"),
+	SND_SOC_DAPM_INPUT("LIN"),
+	SND_SOC_DAPM_INPUT("RIN"),
+};
+
+static const struct snd_soc_dapm_route jz_codec_dapm_routes[] = {
+
+	{"Line Input", NULL, "LIN"},
+	{"Line Input", NULL, "RIN"},
+
+	{"Input Mixer", "Line Capture Switch", "Line Input"},
+	{"Input Mixer", "Mic Capture Switch", "MIC"},
+
+	{"ADC", NULL, "Input Mixer"},
+
+	{"Output Mixer", "Bypass Switch", "Input Mixer"},
+	{"Output Mixer", "DAC Switch", "DAC"},
+
+	{"LOUT", NULL, "Output Mixer"},
+	{"ROUT", NULL, "Output Mixer"},
+};
+
+static int jz_codec_hw_params(struct snd_pcm_substream *substream, struct
+snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+	uint32_t val;
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_device *socdev = rtd->socdev;
+	struct snd_soc_codec *codec = socdev->card->codec;
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S8:
+	case SNDRV_PCM_FORMAT_S16_LE:
+	case SNDRV_PCM_FORMAT_S18_3LE:
+		break;
+	default:
+		return -EINVAL;
+		break;
+	}
+
+	switch (params_rate(params)) {
+	case 8000:
+		val = 0;
+		break;
+	case 11025:
+		val = 1;
+		break;
+	case 12000:
+		val = 2;
+		break;
+	case 16000:
+		val = 3;
+		break;
+	case 22050:
+		val = 4;
+		break;
+	case 24000:
+		val = 5;
+		break;
+	case 32000:
+		val = 6;
+		break;
+	case 44100:
+		val = 7;
+		break;
+	case 48000:
+		val = 8;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	val <<= JZ_CODEC_2_SAMPLE_RATE_OFFSET;
+
+	snd_soc_update_bits(codec, JZ_REG_CODEC_2,
+				JZ_CODEC_2_SAMPLE_RATE_MASK, val);
+
+	return 0;
+}
+
+static int jz_codec_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int jz_codec_set_sysclk(struct snd_soc_dai *codec_dai,
+		int clk_id, unsigned int freq, int dir)
+{
+	return 0;
+}
+
+
+static struct snd_soc_dai_ops jz_codec_dai_ops = {
+	.hw_params = jz_codec_hw_params,
+	.set_fmt = jz_codec_set_fmt,
+/*	.set_clkdiv = jz_codec_set_clkdiv,*/
+	.set_sysclk = jz_codec_set_sysclk,
+};
+
+struct snd_soc_dai jz_codec_dai = {
+	.name = "jz-codec",
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_8000_48000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
+	},
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_8000_48000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
+	},
+	.ops = &jz_codec_dai_ops,
+	.symmetric_rates = 1,
+};
+EXPORT_SYMBOL_GPL(jz_codec_dai);
+
+static int jz_codec_set_bias_level(struct snd_soc_codec *codec,
+				enum snd_soc_bias_level level)
+{
+
+	if (codec->bias_level == SND_SOC_BIAS_OFF && level != SND_SOC_BIAS_OFF) {
+		snd_soc_update_bits(codec, JZ_REG_CODEC_1,
+			JZ_CODEC_1_RESET, JZ_CODEC_1_RESET);
+		udelay(2);
+
+		snd_soc_update_bits(codec, JZ_REG_CODEC_1,
+			JZ_CODEC_1_SUSPEND | JZ_CODEC_1_RESET, 0);
+	}
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+		snd_soc_update_bits(codec, JZ_REG_CODEC_1,
+			JZ_CODEC_1_VREF_DISABLE |
+			JZ_CODEC_1_VREF_AMP_DISABLE |
+			JZ_CODEC_1_HEADPHONE_POWER_DOWN_M |
+			JZ_CODEC_1_VREF_LOW_CURRENT |
+			JZ_CODEC_1_VREF_HIGH_CURRENT,
+			0);
+		break;
+	case SND_SOC_BIAS_PREPARE:
+		snd_soc_update_bits(codec, JZ_REG_CODEC_1,
+			JZ_CODEC_1_VREF_LOW_CURRENT |
+			JZ_CODEC_1_VREF_HIGH_CURRENT,
+			JZ_CODEC_1_VREF_LOW_CURRENT |
+			JZ_CODEC_1_VREF_HIGH_CURRENT);
+		break;
+	case SND_SOC_BIAS_STANDBY:
+		snd_soc_update_bits(codec, JZ_REG_CODEC_1,
+			JZ_CODEC_1_VREF_DISABLE | JZ_CODEC_1_VREF_AMP_DISABLE,
+			JZ_CODEC_1_VREF_DISABLE | JZ_CODEC_1_VREF_AMP_DISABLE);
+		break;
+	case SND_SOC_BIAS_OFF:
+		snd_soc_update_bits(codec, JZ_REG_CODEC_1,
+			JZ_CODEC_1_SUSPEND, JZ_CODEC_1_SUSPEND);
+		break;
+	}
+	codec->bias_level = level;
+
+	return 0;
+}
+
+
+static struct snd_soc_codec *jz_codec_codec;
+
+static int jz_codec_dev_probe(struct platform_device *pdev)
+{
+	int ret;
+	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+	struct snd_soc_codec *codec = jz_codec_codec;
+
+	BUG_ON(!codec);
+
+	socdev->card->codec = codec;
+
+	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to create pcms: %d\n", ret);
+		return ret;
+	}
+
+	snd_soc_add_controls(codec, jz_codec_controls,
+	ARRAY_SIZE(jz_codec_controls));
+
+	snd_soc_dapm_new_controls(codec, jz_codec_dapm_widgets,
+	ARRAY_SIZE(jz_codec_dapm_widgets));
+
+	snd_soc_dapm_add_routes(codec, jz_codec_dapm_routes,
+	ARRAY_SIZE(jz_codec_dapm_routes));
+
+	snd_soc_dapm_new_widgets(codec);
+
+	return 0;
+}
+
+static int jz_codec_dev_remove(struct platform_device *pdev)
+{
+	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+	snd_soc_free_pcms(socdev);
+	snd_soc_dapm_free(socdev);
+
+	return 0;
+}
+
+struct snd_soc_codec_device soc_codec_dev_jzcodec = {
+	.probe = jz_codec_dev_probe,
+	.remove = jz_codec_dev_remove,
+};
+EXPORT_SYMBOL_GPL(soc_codec_dev_jzcodec);
+
+static int __devinit jz_codec_probe(struct platform_device *pdev)
+{
+	int ret;
+	struct jz_codec *jz_codec;
+	struct snd_soc_codec *codec;
+
+	jz_codec = kzalloc(sizeof(*jz_codec), GFP_KERNEL);
+
+	if (!jz_codec)
+		return -ENOMEM;
+
+	jz_codec->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+	if (!jz_codec->mem) {
+		dev_err(&pdev->dev, "Failed to get mmio memory resource\n");
+		ret = -ENOENT;
+		goto err_free_jz_codec;
+	}
+
+	jz_codec->mem = request_mem_region(jz_codec->mem->start,
+				resource_size(jz_codec->mem), pdev->name);
+
+	if (!jz_codec->mem) {
+		dev_err(&pdev->dev, "Failed to request mmio memory region\n");
+		ret = -EBUSY;
+		goto err_free_jz_codec;
+	}
+
+	jz_codec->base = ioremap(jz_codec->mem->start, resource_size(jz_codec->mem));
+
+	if (!jz_codec->base) {
+		dev_err(&pdev->dev, "Failed to ioremap mmio memory\n");
+		ret = -EBUSY;
+		goto err_release_mem_region;
+	}
+
+	jz_codec_dai.dev = &pdev->dev;
+
+	codec = &jz_codec->codec;
+
+	codec->dev		= &pdev->dev;
+	codec->name		= "jz-codec";
+	codec->owner		= THIS_MODULE;
+
+	codec->read		= jz_codec_read;
+	codec->write		= jz_codec_write;
+	codec->set_bias_level	= jz_codec_set_bias_level;
+	codec->bias_level	= SND_SOC_BIAS_OFF;
+
+	codec->dai		= &jz_codec_dai;
+	codec->num_dai		= 1;
+
+	codec->reg_cache	= jz_codec->reg_cache;
+	codec->reg_cache_size	= 2;
+
+	codec->private_data	= jz_codec;
+
+	mutex_init(&codec->mutex);
+	INIT_LIST_HEAD(&codec->dapm_widgets);
+	INIT_LIST_HEAD(&codec->dapm_paths);
+
+	jz_codec_codec = codec;
+
+	snd_soc_update_bits(codec, JZ_REG_CODEC_1,
+				JZ_CODEC_1_SW2_ENABLE, JZ_CODEC_1_SW2_ENABLE);
+
+
+	platform_set_drvdata(pdev, jz_codec);
+	ret = snd_soc_register_codec(codec);
+
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to register codec\n");
+		goto err_iounmap;
+	}
+
+	ret = snd_soc_register_dai(&jz_codec_dai);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to register codec dai\n");
+		goto err_unregister_codec;
+	}
+
+	jz_codec_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+
+	return 0;
+err_unregister_codec:
+	snd_soc_unregister_codec(codec);
+err_iounmap:
+	iounmap(jz_codec->base);
+err_release_mem_region:
+	release_mem_region(jz_codec->mem->start, resource_size(jz_codec->mem));
+err_free_jz_codec:
+	kfree(jz_codec);
+
+	return ret;
+}
+
+static int __devexit jz_codec_remove(struct platform_device *pdev)
+{
+	struct jz_codec *jz_codec = platform_get_drvdata(pdev);
+
+	snd_soc_unregister_dai(&jz_codec_dai);
+	snd_soc_unregister_codec(&jz_codec->codec);
+
+	iounmap(jz_codec->base);
+	release_mem_region(jz_codec->mem->start, resource_size(jz_codec->mem));
+
+	platform_set_drvdata(pdev, NULL);
+	kfree(jz_codec);
+
+	return 0;
+}
+
+static struct platform_driver jz_codec_driver = {
+	.probe = jz_codec_probe,
+	.remove = __devexit_p(jz_codec_remove),
+	.driver = {
+		.name = "jz4740-codec",
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init jz_codec_init(void)
+{
+	return platform_driver_register(&jz_codec_driver);
+}
+module_init(jz_codec_init);
+
+static void __exit jz_codec_exit(void)
+{
+	platform_driver_unregister(&jz_codec_driver);
+}
+module_exit(jz_codec_exit);
+
+MODULE_DESCRIPTION("JZ4720/JZ4740 SoC internal codec driver");
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:jz-codec");
diff --git a/sound/soc/codecs/jzcodec.h b/sound/soc/codecs/jzcodec.h
new file mode 100644
index 0000000..05c57b8
--- /dev/null
+++ b/sound/soc/codecs/jzcodec.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#ifndef _ICODEC_H
+#define _ICODEC_H
+
+#define JZCODEC_SYSCLK	0
+
+extern struct snd_soc_dai jz_codec_dai;
+extern struct snd_soc_codec_device soc_codec_dev_jzcodec;
+
+#endif
-- 
1.5.6.5