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stac9766.c
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1 /*
2  * stac9766.c -- ALSA SoC STAC9766 codec support
3  *
4  * Copyright 2009 Jon Smirl, Digispeaker
5  * Author: Jon Smirl <[email protected]>
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License as published by the
9  * Free Software Foundation; either version 2 of the License, or (at your
10  * option) any later version.
11  *
12  * Features:-
13  *
14  * o Support for AC97 Codec, S/PDIF
15  */
16 
17 #include <linux/init.h>
18 #include <linux/slab.h>
19 #include <linux/module.h>
20 #include <linux/device.h>
21 #include <sound/core.h>
22 #include <sound/pcm.h>
23 #include <sound/ac97_codec.h>
24 #include <sound/initval.h>
25 #include <sound/pcm_params.h>
26 #include <sound/soc.h>
27 #include <sound/tlv.h>
28 
29 #include "stac9766.h"
30 
31 #define STAC9766_VERSION "0.10"
32 
33 /*
34  * STAC9766 register cache
35  */
36 static const u16 stac9766_reg[] = {
37  0x6A90, 0x8000, 0x8000, 0x8000, /* 6 */
38  0x0000, 0x0000, 0x8008, 0x8008, /* e */
39  0x8808, 0x8808, 0x8808, 0x8808, /* 16 */
40  0x8808, 0x0000, 0x8000, 0x0000, /* 1e */
41  0x0000, 0x0000, 0x0000, 0x000f, /* 26 */
42  0x0a05, 0x0400, 0xbb80, 0x0000, /* 2e */
43  0x0000, 0xbb80, 0x0000, 0x0000, /* 36 */
44  0x0000, 0x2000, 0x0000, 0x0100, /* 3e */
45  0x0000, 0x0000, 0x0080, 0x0000, /* 46 */
46  0x0000, 0x0000, 0x0003, 0xffff, /* 4e */
47  0x0000, 0x0000, 0x0000, 0x0000, /* 56 */
48  0x4000, 0x0000, 0x0000, 0x0000, /* 5e */
49  0x1201, 0xFFFF, 0xFFFF, 0x0000, /* 66 */
50  0x0000, 0x0000, 0x0000, 0x0000, /* 6e */
51  0x0000, 0x0000, 0x0000, 0x0006, /* 76 */
52  0x0000, 0x0000, 0x0000, 0x0000, /* 7e */
53 };
54 
55 static const char *stac9766_record_mux[] = {"Mic", "CD", "Video", "AUX",
56  "Line", "Stereo Mix", "Mono Mix", "Phone"};
57 static const char *stac9766_mono_mux[] = {"Mix", "Mic"};
58 static const char *stac9766_mic_mux[] = {"Mic1", "Mic2"};
59 static const char *stac9766_SPDIF_mux[] = {"PCM", "ADC Record"};
60 static const char *stac9766_popbypass_mux[] = {"Normal", "Bypass Mixer"};
61 static const char *stac9766_record_all_mux[] = {"All analog",
62  "Analog plus DAC"};
63 static const char *stac9766_boost1[] = {"0dB", "10dB"};
64 static const char *stac9766_boost2[] = {"0dB", "20dB"};
65 static const char *stac9766_stereo_mic[] = {"Off", "On"};
66 
67 static const struct soc_enum stac9766_record_enum =
68  SOC_ENUM_DOUBLE(AC97_REC_SEL, 8, 0, 8, stac9766_record_mux);
69 static const struct soc_enum stac9766_mono_enum =
70  SOC_ENUM_SINGLE(AC97_GENERAL_PURPOSE, 9, 2, stac9766_mono_mux);
71 static const struct soc_enum stac9766_mic_enum =
72  SOC_ENUM_SINGLE(AC97_GENERAL_PURPOSE, 8, 2, stac9766_mic_mux);
73 static const struct soc_enum stac9766_SPDIF_enum =
74  SOC_ENUM_SINGLE(AC97_STAC_DA_CONTROL, 1, 2, stac9766_SPDIF_mux);
75 static const struct soc_enum stac9766_popbypass_enum =
76  SOC_ENUM_SINGLE(AC97_GENERAL_PURPOSE, 15, 2, stac9766_popbypass_mux);
77 static const struct soc_enum stac9766_record_all_enum =
78  SOC_ENUM_SINGLE(AC97_STAC_ANALOG_SPECIAL, 12, 2,
79  stac9766_record_all_mux);
80 static const struct soc_enum stac9766_boost1_enum =
81  SOC_ENUM_SINGLE(AC97_MIC, 6, 2, stac9766_boost1); /* 0/10dB */
82 static const struct soc_enum stac9766_boost2_enum =
83  SOC_ENUM_SINGLE(AC97_STAC_ANALOG_SPECIAL, 2, 2, stac9766_boost2); /* 0/20dB */
84 static const struct soc_enum stac9766_stereo_mic_enum =
85  SOC_ENUM_SINGLE(AC97_STAC_STEREO_MIC, 2, 1, stac9766_stereo_mic);
86 
87 static const DECLARE_TLV_DB_LINEAR(master_tlv, -4600, 0);
88 static const DECLARE_TLV_DB_LINEAR(record_tlv, 0, 2250);
89 static const DECLARE_TLV_DB_LINEAR(beep_tlv, -4500, 0);
90 static const DECLARE_TLV_DB_LINEAR(mix_tlv, -3450, 1200);
91 
92 static const struct snd_kcontrol_new stac9766_snd_ac97_controls[] = {
93  SOC_DOUBLE_TLV("Speaker Volume", AC97_MASTER, 8, 0, 31, 1, master_tlv),
94  SOC_SINGLE("Speaker Switch", AC97_MASTER, 15, 1, 1),
95  SOC_DOUBLE_TLV("Headphone Volume", AC97_HEADPHONE, 8, 0, 31, 1,
96  master_tlv),
97  SOC_SINGLE("Headphone Switch", AC97_HEADPHONE, 15, 1, 1),
98  SOC_SINGLE_TLV("Mono Out Volume", AC97_MASTER_MONO, 0, 31, 1,
99  master_tlv),
100  SOC_SINGLE("Mono Out Switch", AC97_MASTER_MONO, 15, 1, 1),
101 
102  SOC_DOUBLE_TLV("Record Volume", AC97_REC_GAIN, 8, 0, 15, 0, record_tlv),
103  SOC_SINGLE("Record Switch", AC97_REC_GAIN, 15, 1, 1),
104 
105 
106  SOC_SINGLE_TLV("Beep Volume", AC97_PC_BEEP, 1, 15, 1, beep_tlv),
107  SOC_SINGLE("Beep Switch", AC97_PC_BEEP, 15, 1, 1),
108  SOC_SINGLE("Beep Frequency", AC97_PC_BEEP, 5, 127, 1),
109  SOC_SINGLE_TLV("Phone Volume", AC97_PHONE, 0, 31, 1, mix_tlv),
110  SOC_SINGLE("Phone Switch", AC97_PHONE, 15, 1, 1),
111 
112  SOC_ENUM("Mic Boost1", stac9766_boost1_enum),
113  SOC_ENUM("Mic Boost2", stac9766_boost2_enum),
114  SOC_SINGLE_TLV("Mic Volume", AC97_MIC, 0, 31, 1, mix_tlv),
115  SOC_SINGLE("Mic Switch", AC97_MIC, 15, 1, 1),
116  SOC_ENUM("Stereo Mic", stac9766_stereo_mic_enum),
117 
118  SOC_DOUBLE_TLV("Line Volume", AC97_LINE, 8, 0, 31, 1, mix_tlv),
119  SOC_SINGLE("Line Switch", AC97_LINE, 15, 1, 1),
120  SOC_DOUBLE_TLV("CD Volume", AC97_CD, 8, 0, 31, 1, mix_tlv),
121  SOC_SINGLE("CD Switch", AC97_CD, 15, 1, 1),
122  SOC_DOUBLE_TLV("AUX Volume", AC97_AUX, 8, 0, 31, 1, mix_tlv),
123  SOC_SINGLE("AUX Switch", AC97_AUX, 15, 1, 1),
124  SOC_DOUBLE_TLV("Video Volume", AC97_VIDEO, 8, 0, 31, 1, mix_tlv),
125  SOC_SINGLE("Video Switch", AC97_VIDEO, 15, 1, 1),
126 
127  SOC_DOUBLE_TLV("DAC Volume", AC97_PCM, 8, 0, 31, 1, mix_tlv),
128  SOC_SINGLE("DAC Switch", AC97_PCM, 15, 1, 1),
129  SOC_SINGLE("Loopback Test Switch", AC97_GENERAL_PURPOSE, 7, 1, 0),
130  SOC_SINGLE("3D Volume", AC97_3D_CONTROL, 3, 2, 1),
131  SOC_SINGLE("3D Switch", AC97_GENERAL_PURPOSE, 13, 1, 0),
132 
133  SOC_ENUM("SPDIF Mux", stac9766_SPDIF_enum),
134  SOC_ENUM("Mic1/2 Mux", stac9766_mic_enum),
135  SOC_ENUM("Record All Mux", stac9766_record_all_enum),
136  SOC_ENUM("Record Mux", stac9766_record_enum),
137  SOC_ENUM("Mono Mux", stac9766_mono_enum),
138  SOC_ENUM("Pop Bypass Mux", stac9766_popbypass_enum),
139 };
140 
141 static int stac9766_ac97_write(struct snd_soc_codec *codec, unsigned int reg,
142  unsigned int val)
143 {
144  u16 *cache = codec->reg_cache;
145 
146  if (reg > AC97_STAC_PAGE0) {
147  stac9766_ac97_write(codec, AC97_INT_PAGING, 0);
148  soc_ac97_ops.write(codec->ac97, reg, val);
149  stac9766_ac97_write(codec, AC97_INT_PAGING, 1);
150  return 0;
151  }
152  if (reg / 2 >= ARRAY_SIZE(stac9766_reg))
153  return -EIO;
154 
155  soc_ac97_ops.write(codec->ac97, reg, val);
156  cache[reg / 2] = val;
157  return 0;
158 }
159 
160 static unsigned int stac9766_ac97_read(struct snd_soc_codec *codec,
161  unsigned int reg)
162 {
163  u16 val = 0, *cache = codec->reg_cache;
164 
165  if (reg > AC97_STAC_PAGE0) {
166  stac9766_ac97_write(codec, AC97_INT_PAGING, 0);
167  val = soc_ac97_ops.read(codec->ac97, reg - AC97_STAC_PAGE0);
168  stac9766_ac97_write(codec, AC97_INT_PAGING, 1);
169  return val;
170  }
171  if (reg / 2 >= ARRAY_SIZE(stac9766_reg))
172  return -EIO;
173 
174  if (reg == AC97_RESET || reg == AC97_GPIO_STATUS ||
175  reg == AC97_INT_PAGING || reg == AC97_VENDOR_ID1 ||
176  reg == AC97_VENDOR_ID2) {
177 
178  val = soc_ac97_ops.read(codec->ac97, reg);
179  return val;
180  }
181  return cache[reg / 2];
182 }
183 
184 static int ac97_analog_prepare(struct snd_pcm_substream *substream,
185  struct snd_soc_dai *dai)
186 {
187  struct snd_soc_codec *codec = dai->codec;
188  struct snd_pcm_runtime *runtime = substream->runtime;
189  unsigned short reg, vra;
190 
191  vra = stac9766_ac97_read(codec, AC97_EXTENDED_STATUS);
192 
193  vra |= 0x1; /* enable variable rate audio */
194  vra &= ~0x4; /* disable SPDIF output */
195 
196  stac9766_ac97_write(codec, AC97_EXTENDED_STATUS, vra);
197 
198  if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
199  reg = AC97_PCM_FRONT_DAC_RATE;
200  else
201  reg = AC97_PCM_LR_ADC_RATE;
202 
203  return stac9766_ac97_write(codec, reg, runtime->rate);
204 }
205 
206 static int ac97_digital_prepare(struct snd_pcm_substream *substream,
207  struct snd_soc_dai *dai)
208 {
209  struct snd_soc_codec *codec = dai->codec;
210  struct snd_pcm_runtime *runtime = substream->runtime;
211  unsigned short reg, vra;
212 
213  stac9766_ac97_write(codec, AC97_SPDIF, 0x2002);
214 
215  vra = stac9766_ac97_read(codec, AC97_EXTENDED_STATUS);
216  vra |= 0x5; /* Enable VRA and SPDIF out */
217 
218  stac9766_ac97_write(codec, AC97_EXTENDED_STATUS, vra);
219 
220  reg = AC97_PCM_FRONT_DAC_RATE;
221 
222  return stac9766_ac97_write(codec, reg, runtime->rate);
223 }
224 
225 static int stac9766_set_bias_level(struct snd_soc_codec *codec,
226  enum snd_soc_bias_level level)
227 {
228  switch (level) {
229  case SND_SOC_BIAS_ON: /* full On */
230  case SND_SOC_BIAS_PREPARE: /* partial On */
231  case SND_SOC_BIAS_STANDBY: /* Off, with power */
232  stac9766_ac97_write(codec, AC97_POWERDOWN, 0x0000);
233  break;
234  case SND_SOC_BIAS_OFF: /* Off, without power */
235  /* disable everything including AC link */
236  stac9766_ac97_write(codec, AC97_POWERDOWN, 0xffff);
237  break;
238  }
239  codec->dapm.bias_level = level;
240  return 0;
241 }
242 
243 static int stac9766_reset(struct snd_soc_codec *codec, int try_warm)
244 {
245  if (try_warm && soc_ac97_ops.warm_reset) {
246  soc_ac97_ops.warm_reset(codec->ac97);
247  if (stac9766_ac97_read(codec, 0) == stac9766_reg[0])
248  return 1;
249  }
250 
251  soc_ac97_ops.reset(codec->ac97);
252  if (soc_ac97_ops.warm_reset)
253  soc_ac97_ops.warm_reset(codec->ac97);
254  if (stac9766_ac97_read(codec, 0) != stac9766_reg[0])
255  return -EIO;
256  return 0;
257 }
258 
259 static int stac9766_codec_suspend(struct snd_soc_codec *codec)
260 {
261  stac9766_set_bias_level(codec, SND_SOC_BIAS_OFF);
262  return 0;
263 }
264 
265 static int stac9766_codec_resume(struct snd_soc_codec *codec)
266 {
267  u16 id, reset;
268 
269  reset = 0;
270  /* give the codec an AC97 warm reset to start the link */
271 reset:
272  if (reset > 5) {
273  printk(KERN_ERR "stac9766 failed to resume");
274  return -EIO;
275  }
276  codec->ac97->bus->ops->warm_reset(codec->ac97);
277  id = soc_ac97_ops.read(codec->ac97, AC97_VENDOR_ID2);
278  if (id != 0x4c13) {
279  stac9766_reset(codec, 0);
280  reset++;
281  goto reset;
282  }
283  stac9766_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
284 
285  return 0;
286 }
287 
288 static const struct snd_soc_dai_ops stac9766_dai_ops_analog = {
289  .prepare = ac97_analog_prepare,
290 };
291 
292 static const struct snd_soc_dai_ops stac9766_dai_ops_digital = {
293  .prepare = ac97_digital_prepare,
294 };
295 
296 static struct snd_soc_dai_driver stac9766_dai[] = {
297 {
298  .name = "stac9766-hifi-analog",
299  .ac97_control = 1,
300 
301  /* stream cababilities */
302  .playback = {
303  .stream_name = "stac9766 analog",
304  .channels_min = 1,
305  .channels_max = 2,
306  .rates = SNDRV_PCM_RATE_8000_48000,
307  .formats = SND_SOC_STD_AC97_FMTS,
308  },
309  .capture = {
310  .stream_name = "stac9766 analog",
311  .channels_min = 1,
312  .channels_max = 2,
313  .rates = SNDRV_PCM_RATE_8000_48000,
314  .formats = SND_SOC_STD_AC97_FMTS,
315  },
316  /* alsa ops */
317  .ops = &stac9766_dai_ops_analog,
318 },
319 {
320  .name = "stac9766-hifi-IEC958",
321  .ac97_control = 1,
322 
323  /* stream cababilities */
324  .playback = {
325  .stream_name = "stac9766 IEC958",
326  .channels_min = 1,
327  .channels_max = 2,
328  .rates = SNDRV_PCM_RATE_32000 | \
329  SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
330  .formats = SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE,
331  },
332  /* alsa ops */
333  .ops = &stac9766_dai_ops_digital,
334 }
335 };
336 
337 static int stac9766_codec_probe(struct snd_soc_codec *codec)
338 {
339  int ret = 0;
340 
341  printk(KERN_INFO "STAC9766 SoC Audio Codec %s\n", STAC9766_VERSION);
342 
343  ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0);
344  if (ret < 0)
345  goto codec_err;
346 
347  /* do a cold reset for the controller and then try
348  * a warm reset followed by an optional cold reset for codec */
349  stac9766_reset(codec, 0);
350  ret = stac9766_reset(codec, 1);
351  if (ret < 0) {
352  printk(KERN_ERR "Failed to reset STAC9766: AC97 link error\n");
353  goto codec_err;
354  }
355 
356  stac9766_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
357 
358  snd_soc_add_codec_controls(codec, stac9766_snd_ac97_controls,
359  ARRAY_SIZE(stac9766_snd_ac97_controls));
360 
361  return 0;
362 
363 codec_err:
364  snd_soc_free_ac97_codec(codec);
365  return ret;
366 }
367 
368 static int stac9766_codec_remove(struct snd_soc_codec *codec)
369 {
370  snd_soc_free_ac97_codec(codec);
371  return 0;
372 }
373 
374 static struct snd_soc_codec_driver soc_codec_dev_stac9766 = {
375  .write = stac9766_ac97_write,
376  .read = stac9766_ac97_read,
377  .set_bias_level = stac9766_set_bias_level,
378  .probe = stac9766_codec_probe,
379  .remove = stac9766_codec_remove,
380  .suspend = stac9766_codec_suspend,
381  .resume = stac9766_codec_resume,
382  .reg_cache_size = ARRAY_SIZE(stac9766_reg),
383  .reg_word_size = sizeof(u16),
384  .reg_cache_step = 2,
385  .reg_cache_default = stac9766_reg,
386 };
387 
388 static __devinit int stac9766_probe(struct platform_device *pdev)
389 {
390  return snd_soc_register_codec(&pdev->dev,
391  &soc_codec_dev_stac9766, stac9766_dai, ARRAY_SIZE(stac9766_dai));
392 }
393 
394 static int __devexit stac9766_remove(struct platform_device *pdev)
395 {
396  snd_soc_unregister_codec(&pdev->dev);
397  return 0;
398 }
399 
400 static struct platform_driver stac9766_codec_driver = {
401  .driver = {
402  .name = "stac9766-codec",
403  .owner = THIS_MODULE,
404  },
405 
406  .probe = stac9766_probe,
407  .remove = __devexit_p(stac9766_remove),
408 };
409 
410 module_platform_driver(stac9766_codec_driver);
411 
412 MODULE_DESCRIPTION("ASoC stac9766 driver");
413 MODULE_AUTHOR("Jon Smirl <[email protected]>");
414 MODULE_LICENSE("GPL");
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