projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / soc / codecs / tlv320dac33.c
1 /*
2 * ALSA SoC Texas Instruments TLV320DAC33 codec driver
3 *
4 * Author: Peter Ujfalusi <peter.ujfalusi@nokia.com>
5 *
6 * Copyright: (C) 2009 Nokia Corporation
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * 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/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/init.h>
27 #include <linux/delay.h>
28 #include <linux/pm.h>
29 #include <linux/i2c.h>
30 #include <linux/platform_device.h>
31 #include <linux/interrupt.h>
32 #include <linux/gpio.h>
33 #include <linux/regulator/consumer.h>
34 #include <sound/core.h>
35 #include <sound/pcm.h>
36 #include <sound/pcm_params.h>
37 #include <sound/soc.h>
38 #include <sound/soc-dapm.h>
39 #include <sound/initval.h>
40 #include <sound/tlv.h>
41
42 #include <sound/tlv320dac33-plat.h>
43 #include "tlv320dac33.h"
44
45 #define DAC33_BUFFER_SIZE_BYTES 24576 /* bytes, 12288 16 bit words,
46 * 6144 stereo */
47 #define DAC33_BUFFER_SIZE_SAMPLES 6144
48
49 #define NSAMPLE_MAX 5700
50
51 #define LATENCY_TIME_MS 20
52
53 static struct snd_soc_codec *tlv320dac33_codec;
54
55 enum dac33_state {
56 DAC33_IDLE = 0,
57 DAC33_PREFILL,
58 DAC33_PLAYBACK,
59 DAC33_FLUSH,
60 };
61
62 enum dac33_fifo_modes {
63 DAC33_FIFO_BYPASS = 0,
64 DAC33_FIFO_MODE1,
65 DAC33_FIFO_MODE7,
66 DAC33_FIFO_LAST_MODE,
67 };
68
69 #define DAC33_NUM_SUPPLIES 3
70 static const char *dac33_supply_names[DAC33_NUM_SUPPLIES] = {
71 "AVDD",
72 "DVDD",
73 "IOVDD",
74 };
75
76 struct tlv320dac33_priv {
77 struct mutex mutex;
78 struct workqueue_struct *dac33_wq;
79 struct work_struct work;
80 struct snd_soc_codec codec;
81 struct regulator_bulk_data supplies[DAC33_NUM_SUPPLIES];
82 int power_gpio;
83 int chip_power;
84 int irq;
85 unsigned int refclk;
86
87 unsigned int alarm_threshold; /* set to be half of LATENCY_TIME_MS */
88 unsigned int nsample_min; /* nsample should not be lower than
89 * this */
90 unsigned int nsample_max; /* nsample should not be higher than
91 * this */
92 enum dac33_fifo_modes fifo_mode;/* FIFO mode selection */
93 unsigned int nsample; /* burst read amount from host */
94 u8 burst_bclkdiv; /* BCLK divider value in burst mode */
95
96 enum dac33_state state;
97 };
98
99 static const u8 dac33_reg[DAC33_CACHEREGNUM] = {
100 0x00, 0x00, 0x00, 0x00, /* 0x00 - 0x03 */
101 0x00, 0x00, 0x00, 0x00, /* 0x04 - 0x07 */
102 0x00, 0x00, 0x00, 0x00, /* 0x08 - 0x0b */
103 0x00, 0x00, 0x00, 0x00, /* 0x0c - 0x0f */
104 0x00, 0x00, 0x00, 0x00, /* 0x10 - 0x13 */
105 0x00, 0x00, 0x00, 0x00, /* 0x14 - 0x17 */
106 0x00, 0x00, 0x00, 0x00, /* 0x18 - 0x1b */
107 0x00, 0x00, 0x00, 0x00, /* 0x1c - 0x1f */
108 0x00, 0x00, 0x00, 0x00, /* 0x20 - 0x23 */
109 0x00, 0x00, 0x00, 0x00, /* 0x24 - 0x27 */
110 0x00, 0x00, 0x00, 0x00, /* 0x28 - 0x2b */
111 0x00, 0x00, 0x00, 0x80, /* 0x2c - 0x2f */
112 0x80, 0x00, 0x00, 0x00, /* 0x30 - 0x33 */
113 0x00, 0x00, 0x00, 0x00, /* 0x34 - 0x37 */
114 0x00, 0x00, /* 0x38 - 0x39 */
115 /* Registers 0x3a - 0x3f are reserved */
116 0x00, 0x00, /* 0x3a - 0x3b */
117 0x00, 0x00, 0x00, 0x00, /* 0x3c - 0x3f */
118
119 0x00, 0x00, 0x00, 0x00, /* 0x40 - 0x43 */
120 0x00, 0x80, /* 0x44 - 0x45 */
121 /* Registers 0x46 - 0x47 are reserved */
122 0x80, 0x80, /* 0x46 - 0x47 */
123
124 0x80, 0x00, 0x00, /* 0x48 - 0x4a */
125 /* Registers 0x4b - 0x7c are reserved */
126 0x00, /* 0x4b */
127 0x00, 0x00, 0x00, 0x00, /* 0x4c - 0x4f */
128 0x00, 0x00, 0x00, 0x00, /* 0x50 - 0x53 */
129 0x00, 0x00, 0x00, 0x00, /* 0x54 - 0x57 */
130 0x00, 0x00, 0x00, 0x00, /* 0x58 - 0x5b */
131 0x00, 0x00, 0x00, 0x00, /* 0x5c - 0x5f */
132 0x00, 0x00, 0x00, 0x00, /* 0x60 - 0x63 */
133 0x00, 0x00, 0x00, 0x00, /* 0x64 - 0x67 */
134 0x00, 0x00, 0x00, 0x00, /* 0x68 - 0x6b */
135 0x00, 0x00, 0x00, 0x00, /* 0x6c - 0x6f */
136 0x00, 0x00, 0x00, 0x00, /* 0x70 - 0x73 */
137 0x00, 0x00, 0x00, 0x00, /* 0x74 - 0x77 */
138 0x00, 0x00, 0x00, 0x00, /* 0x78 - 0x7b */
139 0x00, /* 0x7c */
140
141 0xda, 0x33, 0x03, /* 0x7d - 0x7f */
142 };
143
144 /* Register read and write */
145 static inline unsigned int dac33_read_reg_cache(struct snd_soc_codec *codec,
146 unsigned reg)
147 {
148 u8 *cache = codec->reg_cache;
149 if (reg >= DAC33_CACHEREGNUM)
150 return 0;
151
152 return cache[reg];
153 }
154
155 static inline void dac33_write_reg_cache(struct snd_soc_codec *codec,
156 u8 reg, u8 value)
157 {
158 u8 *cache = codec->reg_cache;
159 if (reg >= DAC33_CACHEREGNUM)
160 return;
161
162 cache[reg] = value;
163 }
164
165 static int dac33_read(struct snd_soc_codec *codec, unsigned int reg,
166 u8 *value)
167 {
168 struct tlv320dac33_priv *dac33 = codec->private_data;
169 int val;
170
171 *value = reg & 0xff;
172
173 /* If powered off, return the cached value */
174 if (dac33->chip_power) {
175 val = i2c_smbus_read_byte_data(codec->control_data, value[0]);
176 if (val < 0) {
177 dev_err(codec->dev, "Read failed (%d)\n", val);
178 value[0] = dac33_read_reg_cache(codec, reg);
179 } else {
180 value[0] = val;
181 dac33_write_reg_cache(codec, reg, val);
182 }
183 } else {
184 value[0] = dac33_read_reg_cache(codec, reg);
185 }
186
187 return 0;
188 }
189
190 static int dac33_write(struct snd_soc_codec *codec, unsigned int reg,
191 unsigned int value)
192 {
193 struct tlv320dac33_priv *dac33 = codec->private_data;
194 u8 data[2];
195 int ret = 0;
196
197 /*
198 * data is
199 * D15..D8 dac33 register offset
200 * D7...D0 register data
201 */
202 data[0] = reg & 0xff;
203 data[1] = value & 0xff;
204
205 dac33_write_reg_cache(codec, data[0], data[1]);
206 if (dac33->chip_power) {
207 ret = codec->hw_write(codec->control_data, data, 2);
208 if (ret != 2)
209 dev_err(codec->dev, "Write failed (%d)\n", ret);
210 else
211 ret = 0;
212 }
213
214 return ret;
215 }
216
217 static int dac33_write_locked(struct snd_soc_codec *codec, unsigned int reg,
218 unsigned int value)
219 {
220 struct tlv320dac33_priv *dac33 = codec->private_data;
221 int ret;
222
223 mutex_lock(&dac33->mutex);
224 ret = dac33_write(codec, reg, value);
225 mutex_unlock(&dac33->mutex);
226
227 return ret;
228 }
229
230 #define DAC33_I2C_ADDR_AUTOINC 0x80
231 static int dac33_write16(struct snd_soc_codec *codec, unsigned int reg,
232 unsigned int value)
233 {
234 struct tlv320dac33_priv *dac33 = codec->private_data;
235 u8 data[3];
236 int ret = 0;
237
238 /*
239 * data is
240 * D23..D16 dac33 register offset
241 * D15..D8 register data MSB
242 * D7...D0 register data LSB
243 */
244 data[0] = reg & 0xff;
245 data[1] = (value >> 8) & 0xff;
246 data[2] = value & 0xff;
247
248 dac33_write_reg_cache(codec, data[0], data[1]);
249 dac33_write_reg_cache(codec, data[0] + 1, data[2]);
250
251 if (dac33->chip_power) {
252 /* We need to set autoincrement mode for 16 bit writes */
253 data[0] |= DAC33_I2C_ADDR_AUTOINC;
254 ret = codec->hw_write(codec->control_data, data, 3);
255 if (ret != 3)
256 dev_err(codec->dev, "Write failed (%d)\n", ret);
257 else
258 ret = 0;
259 }
260
261 return ret;
262 }
263
264 static void dac33_restore_regs(struct snd_soc_codec *codec)
265 {
266 struct tlv320dac33_priv *dac33 = codec->private_data;
267 u8 *cache = codec->reg_cache;
268 u8 data[2];
269 int i, ret;
270
271 if (!dac33->chip_power)
272 return;
273
274 for (i = DAC33_PWR_CTRL; i <= DAC33_INTP_CTRL_B; i++) {
275 data[0] = i;
276 data[1] = cache[i];
277 /* Skip the read only registers */
278 if ((i >= DAC33_INT_OSC_STATUS &&
279 i <= DAC33_INT_OSC_FREQ_RAT_READ_B) ||
280 (i >= DAC33_FIFO_WPTR_MSB && i <= DAC33_FIFO_IRQ_FLAG) ||
281 i == DAC33_DAC_STATUS_FLAGS ||
282 i == DAC33_SRC_EST_REF_CLK_RATIO_A ||
283 i == DAC33_SRC_EST_REF_CLK_RATIO_B)
284 continue;
285 ret = codec->hw_write(codec->control_data, data, 2);
286 if (ret != 2)
287 dev_err(codec->dev, "Write failed (%d)\n", ret);
288 }
289 for (i = DAC33_LDAC_PWR_CTRL; i <= DAC33_LINEL_TO_LLO_VOL; i++) {
290 data[0] = i;
291 data[1] = cache[i];
292 ret = codec->hw_write(codec->control_data, data, 2);
293 if (ret != 2)
294 dev_err(codec->dev, "Write failed (%d)\n", ret);
295 }
296 for (i = DAC33_LINER_TO_RLO_VOL; i <= DAC33_OSC_TRIM; i++) {
297 data[0] = i;
298 data[1] = cache[i];
299 ret = codec->hw_write(codec->control_data, data, 2);
300 if (ret != 2)
301 dev_err(codec->dev, "Write failed (%d)\n", ret);
302 }
303 }
304
305 static inline void dac33_soft_power(struct snd_soc_codec *codec, int power)
306 {
307 u8 reg;
308
309 reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
310 if (power)
311 reg |= DAC33_PDNALLB;
312 else
313 reg &= ~DAC33_PDNALLB;
314 dac33_write(codec, DAC33_PWR_CTRL, reg);
315 }
316
317 static int dac33_hard_power(struct snd_soc_codec *codec, int power)
318 {
319 struct tlv320dac33_priv *dac33 = codec->private_data;
320 int ret;
321
322 mutex_lock(&dac33->mutex);
323 if (power) {
324 ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies),
325 dac33->supplies);
326 if (ret != 0) {
327 dev_err(codec->dev,
328 "Failed to enable supplies: %d\n", ret);
329 goto exit;
330 }
331
332 if (dac33->power_gpio >= 0)
333 gpio_set_value(dac33->power_gpio, 1);
334
335 dac33->chip_power = 1;
336
337 /* Restore registers */
338 dac33_restore_regs(codec);
339
340 dac33_soft_power(codec, 1);
341 } else {
342 dac33_soft_power(codec, 0);
343 if (dac33->power_gpio >= 0)
344 gpio_set_value(dac33->power_gpio, 0);
345
346 ret = regulator_bulk_disable(ARRAY_SIZE(dac33->supplies),
347 dac33->supplies);
348 if (ret != 0) {
349 dev_err(codec->dev,
350 "Failed to disable supplies: %d\n", ret);
351 goto exit;
352 }
353
354 dac33->chip_power = 0;
355 }
356
357 exit:
358 mutex_unlock(&dac33->mutex);
359 return ret;
360 }
361
362 static int dac33_get_nsample(struct snd_kcontrol *kcontrol,
363 struct snd_ctl_elem_value *ucontrol)
364 {
365 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
366 struct tlv320dac33_priv *dac33 = codec->private_data;
367
368 ucontrol->value.integer.value[0] = dac33->nsample;
369
370 return 0;
371 }
372
373 static int dac33_set_nsample(struct snd_kcontrol *kcontrol,
374 struct snd_ctl_elem_value *ucontrol)
375 {
376 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
377 struct tlv320dac33_priv *dac33 = codec->private_data;
378 int ret = 0;
379
380 if (dac33->nsample == ucontrol->value.integer.value[0])
381 return 0;
382
383 if (ucontrol->value.integer.value[0] < dac33->nsample_min ||
384 ucontrol->value.integer.value[0] > dac33->nsample_max)
385 ret = -EINVAL;
386 else
387 dac33->nsample = ucontrol->value.integer.value[0];
388
389 return ret;
390 }
391
392 static int dac33_get_fifo_mode(struct snd_kcontrol *kcontrol,
393 struct snd_ctl_elem_value *ucontrol)
394 {
395 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
396 struct tlv320dac33_priv *dac33 = codec->private_data;
397
398 ucontrol->value.integer.value[0] = dac33->fifo_mode;
399
400 return 0;
401 }
402
403 static int dac33_set_fifo_mode(struct snd_kcontrol *kcontrol,
404 struct snd_ctl_elem_value *ucontrol)
405 {
406 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
407 struct tlv320dac33_priv *dac33 = codec->private_data;
408 int ret = 0;
409
410 if (dac33->fifo_mode == ucontrol->value.integer.value[0])
411 return 0;
412 /* Do not allow changes while stream is running*/
413 if (codec->active)
414 return -EPERM;
415
416 if (ucontrol->value.integer.value[0] < 0 ||
417 ucontrol->value.integer.value[0] >= DAC33_FIFO_LAST_MODE)
418 ret = -EINVAL;
419 else
420 dac33->fifo_mode = ucontrol->value.integer.value[0];
421
422 return ret;
423 }
424
425 /* Codec operation modes */
426 static const char *dac33_fifo_mode_texts[] = {
427 "Bypass", "Mode 1", "Mode 7"
428 };
429
430 static const struct soc_enum dac33_fifo_mode_enum =
431 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(dac33_fifo_mode_texts),
432 dac33_fifo_mode_texts);
433
434 /*
435 * DACL/R digital volume control:
436 * from 0 dB to -63.5 in 0.5 dB steps
437 * Need to be inverted later on:
438 * 0x00 == 0 dB
439 * 0x7f == -63.5 dB
440 */
441 static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0);
442
443 static const struct snd_kcontrol_new dac33_snd_controls[] = {
444 SOC_DOUBLE_R_TLV("DAC Digital Playback Volume",
445 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL,
446 0, 0x7f, 1, dac_digivol_tlv),
447 SOC_DOUBLE_R("DAC Digital Playback Switch",
448 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1),
449 SOC_DOUBLE_R("Line to Line Out Volume",
450 DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1),
451 };
452
453 static const struct snd_kcontrol_new dac33_nsample_snd_controls[] = {
454 SOC_SINGLE_EXT("nSample", 0, 0, 5900, 0,
455 dac33_get_nsample, dac33_set_nsample),
456 SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum,
457 dac33_get_fifo_mode, dac33_set_fifo_mode),
458 };
459
460 /* Analog bypass */
461 static const struct snd_kcontrol_new dac33_dapm_abypassl_control =
462 SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1);
463
464 static const struct snd_kcontrol_new dac33_dapm_abypassr_control =
465 SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1);
466
467 static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = {
468 SND_SOC_DAPM_OUTPUT("LEFT_LO"),
469 SND_SOC_DAPM_OUTPUT("RIGHT_LO"),
470
471 SND_SOC_DAPM_INPUT("LINEL"),
472 SND_SOC_DAPM_INPUT("LINER"),
473
474 SND_SOC_DAPM_DAC("DACL", "Left Playback", DAC33_LDAC_PWR_CTRL, 2, 0),
475 SND_SOC_DAPM_DAC("DACR", "Right Playback", DAC33_RDAC_PWR_CTRL, 2, 0),
476
477 /* Analog bypass */
478 SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0,
479 &dac33_dapm_abypassl_control),
480 SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0,
481 &dac33_dapm_abypassr_control),
482
483 SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amp Power",
484 DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0),
485 SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amp Power",
486 DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0),
487 };
488
489 static const struct snd_soc_dapm_route audio_map[] = {
490 /* Analog bypass */
491 {"Analog Left Bypass", "Switch", "LINEL"},
492 {"Analog Right Bypass", "Switch", "LINER"},
493
494 {"Output Left Amp Power", NULL, "DACL"},
495 {"Output Right Amp Power", NULL, "DACR"},
496
497 {"Output Left Amp Power", NULL, "Analog Left Bypass"},
498 {"Output Right Amp Power", NULL, "Analog Right Bypass"},
499
500 /* output */
501 {"LEFT_LO", NULL, "Output Left Amp Power"},
502 {"RIGHT_LO", NULL, "Output Right Amp Power"},
503 };
504
505 static int dac33_add_widgets(struct snd_soc_codec *codec)
506 {
507 snd_soc_dapm_new_controls(codec, dac33_dapm_widgets,
508 ARRAY_SIZE(dac33_dapm_widgets));
509
510 /* set up audio path interconnects */
511 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
512
513 return 0;
514 }
515
516 static int dac33_set_bias_level(struct snd_soc_codec *codec,
517 enum snd_soc_bias_level level)
518 {
519 int ret;
520
521 switch (level) {
522 case SND_SOC_BIAS_ON:
523 dac33_soft_power(codec, 1);
524 break;
525 case SND_SOC_BIAS_PREPARE:
526 break;
527 case SND_SOC_BIAS_STANDBY:
528 if (codec->bias_level == SND_SOC_BIAS_OFF) {
529 ret = dac33_hard_power(codec, 1);
530 if (ret != 0)
531 return ret;
532 }
533
534 dac33_soft_power(codec, 0);
535 break;
536 case SND_SOC_BIAS_OFF:
537 ret = dac33_hard_power(codec, 0);
538 if (ret != 0)
539 return ret;
540
541 break;
542 }
543 codec->bias_level = level;
544
545 return 0;
546 }
547
548 static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
549 {
550 struct snd_soc_codec *codec;
551
552 codec = &dac33->codec;
553
554 switch (dac33->fifo_mode) {
555 case DAC33_FIFO_MODE1:
556 dac33_write16(codec, DAC33_NSAMPLE_MSB,
557 DAC33_THRREG(dac33->nsample));
558 dac33_write16(codec, DAC33_PREFILL_MSB,
559 DAC33_THRREG(dac33->alarm_threshold));
560 break;
561 case DAC33_FIFO_MODE7:
562 dac33_write16(codec, DAC33_PREFILL_MSB,
563 DAC33_THRREG(10));
564 break;
565 default:
566 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
567 dac33->fifo_mode);
568 break;
569 }
570 }
571
572 static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
573 {
574 struct snd_soc_codec *codec;
575
576 codec = &dac33->codec;
577
578 switch (dac33->fifo_mode) {
579 case DAC33_FIFO_MODE1:
580 dac33_write16(codec, DAC33_NSAMPLE_MSB,
581 DAC33_THRREG(dac33->nsample));
582 break;
583 case DAC33_FIFO_MODE7:
584 /* At the moment we are not using interrupts in mode7 */
585 break;
586 default:
587 dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
588 dac33->fifo_mode);
589 break;
590 }
591 }
592
593 static void dac33_work(struct work_struct *work)
594 {
595 struct snd_soc_codec *codec;
596 struct tlv320dac33_priv *dac33;
597 u8 reg;
598
599 dac33 = container_of(work, struct tlv320dac33_priv, work);
600 codec = &dac33->codec;
601
602 mutex_lock(&dac33->mutex);
603 switch (dac33->state) {
604 case DAC33_PREFILL:
605 dac33->state = DAC33_PLAYBACK;
606 dac33_prefill_handler(dac33);
607 break;
608 case DAC33_PLAYBACK:
609 dac33_playback_handler(dac33);
610 break;
611 case DAC33_IDLE:
612 break;
613 case DAC33_FLUSH:
614 dac33->state = DAC33_IDLE;
615 /* Mask all interrupts from dac33 */
616 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
617
618 /* flush fifo */
619 reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
620 reg |= DAC33_FIFOFLUSH;
621 dac33_write(codec, DAC33_FIFO_CTRL_A, reg);
622 break;
623 }
624 mutex_unlock(&dac33->mutex);
625 }
626
627 static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
628 {
629 struct snd_soc_codec *codec = dev;
630 struct tlv320dac33_priv *dac33 = codec->private_data;
631
632 queue_work(dac33->dac33_wq, &dac33->work);
633
634 return IRQ_HANDLED;
635 }
636
637 static void dac33_shutdown(struct snd_pcm_substream *substream,
638 struct snd_soc_dai *dai)
639 {
640 struct snd_soc_pcm_runtime *rtd = substream->private_data;
641 struct snd_soc_device *socdev = rtd->socdev;
642 struct snd_soc_codec *codec = socdev->card->codec;
643 struct tlv320dac33_priv *dac33 = codec->private_data;
644 unsigned int pwr_ctrl;
645
646 /* Stop pending workqueue */
647 if (dac33->fifo_mode)
648 cancel_work_sync(&dac33->work);
649
650 mutex_lock(&dac33->mutex);
651 pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
652 pwr_ctrl &= ~(DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB);
653 dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
654 mutex_unlock(&dac33->mutex);
655 }
656
657 static void dac33_oscwait(struct snd_soc_codec *codec)
658 {
659 int timeout = 20;
660 u8 reg;
661
662 do {
663 msleep(1);
664 dac33_read(codec, DAC33_INT_OSC_STATUS, &reg);
665 } while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
666 if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
667 dev_err(codec->dev,
668 "internal oscillator calibration failed\n");
669 }
670
671 static int dac33_hw_params(struct snd_pcm_substream *substream,
672 struct snd_pcm_hw_params *params,
673 struct snd_soc_dai *dai)
674 {
675 struct snd_soc_pcm_runtime *rtd = substream->private_data;
676 struct snd_soc_device *socdev = rtd->socdev;
677 struct snd_soc_codec *codec = socdev->card->codec;
678
679 /* Check parameters for validity */
680 switch (params_rate(params)) {
681 case 44100:
682 case 48000:
683 break;
684 default:
685 dev_err(codec->dev, "unsupported rate %d\n",
686 params_rate(params));
687 return -EINVAL;
688 }
689
690 switch (params_format(params)) {
691 case SNDRV_PCM_FORMAT_S16_LE:
692 break;
693 default:
694 dev_err(codec->dev, "unsupported format %d\n",
695 params_format(params));
696 return -EINVAL;
697 }
698
699 return 0;
700 }
701
702 #define CALC_OSCSET(rate, refclk) ( \
703 ((((rate * 10000) / refclk) * 4096) + 7000) / 10000)
704 #define CALC_RATIOSET(rate, refclk) ( \
705 ((((refclk * 100000) / rate) * 16384) + 50000) / 100000)
706
707 /*
708 * tlv320dac33 is strict on the sequence of the register writes, if the register
709 * writes happens in different order, than dac33 might end up in unknown state.
710 * Use the known, working sequence of register writes to initialize the dac33.
711 */
712 static int dac33_prepare_chip(struct snd_pcm_substream *substream)
713 {
714 struct snd_soc_pcm_runtime *rtd = substream->private_data;
715 struct snd_soc_device *socdev = rtd->socdev;
716 struct snd_soc_codec *codec = socdev->card->codec;
717 struct tlv320dac33_priv *dac33 = codec->private_data;
718 unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
719 u8 aictrl_a, aictrl_b, fifoctrl_a;
720
721 switch (substream->runtime->rate) {
722 case 44100:
723 case 48000:
724 oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
725 ratioset = CALC_RATIOSET(substream->runtime->rate,
726 dac33->refclk);
727 break;
728 default:
729 dev_err(codec->dev, "unsupported rate %d\n",
730 substream->runtime->rate);
731 return -EINVAL;
732 }
733
734
735 aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
736 aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
737 /* Read FIFO control A, and clear FIFO flush bit */
738 fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
739 fifoctrl_a &= ~DAC33_FIFOFLUSH;
740
741 fifoctrl_a &= ~DAC33_WIDTH;
742 switch (substream->runtime->format) {
743 case SNDRV_PCM_FORMAT_S16_LE:
744 aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
745 fifoctrl_a |= DAC33_WIDTH;
746 break;
747 default:
748 dev_err(codec->dev, "unsupported format %d\n",
749 substream->runtime->format);
750 return -EINVAL;
751 }
752
753 mutex_lock(&dac33->mutex);
754 dac33_soft_power(codec, 1);
755
756 reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
757 dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp);
758
759 /* Write registers 0x08 and 0x09 (MSB, LSB) */
760 dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
761
762 /* calib time: 128 is a nice number ;) */
763 dac33_write(codec, DAC33_CALIB_TIME, 128);
764
765 /* adjustment treshold & step */
766 dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
767 DAC33_ADJSTEP(1));
768
769 /* div=4 / gain=1 / div */
770 dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
771
772 pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
773 pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
774 dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
775
776 dac33_oscwait(codec);
777
778 if (dac33->fifo_mode) {
779 /* Generic for all FIFO modes */
780 /* 50-51 : ASRC Control registers */
781 dac33_write(codec, DAC33_ASRC_CTRL_A, (1 << 4)); /* div=2 */
782 dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */
783
784 /* Write registers 0x34 and 0x35 (MSB, LSB) */
785 dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
786
787 /* Set interrupts to high active */
788 dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
789 } else {
790 /* FIFO bypass mode */
791 /* 50-51 : ASRC Control registers */
792 dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
793 dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */
794 }
795
796 /* Interrupt behaviour configuration */
797 switch (dac33->fifo_mode) {
798 case DAC33_FIFO_MODE1:
799 dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
800 DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
801 dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
802 break;
803 case DAC33_FIFO_MODE7:
804 /* Disable all interrupts */
805 dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
806 break;
807 default:
808 /* in FIFO bypass mode, the interrupts are not used */
809 break;
810 }
811
812 aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
813
814 switch (dac33->fifo_mode) {
815 case DAC33_FIFO_MODE1:
816 /*
817 * For mode1:
818 * Disable the FIFO bypass (Enable the use of FIFO)
819 * Select nSample mode
820 * BCLK is only running when data is needed by DAC33
821 */
822 fifoctrl_a &= ~DAC33_FBYPAS;
823 fifoctrl_a &= ~DAC33_FAUTO;
824 aictrl_b &= ~DAC33_BCLKON;
825 break;
826 case DAC33_FIFO_MODE7:
827 /*
828 * For mode1:
829 * Disable the FIFO bypass (Enable the use of FIFO)
830 * Select Threshold mode
831 * BCLK is only running when data is needed by DAC33
832 */
833 fifoctrl_a &= ~DAC33_FBYPAS;
834 fifoctrl_a |= DAC33_FAUTO;
835 aictrl_b &= ~DAC33_BCLKON;
836 break;
837 default:
838 /*
839 * For FIFO bypass mode:
840 * Enable the FIFO bypass (Disable the FIFO use)
841 * Set the BCLK as continous
842 */
843 fifoctrl_a |= DAC33_FBYPAS;
844 aictrl_b |= DAC33_BCLKON;
845 break;
846 }
847
848 dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a);
849 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
850 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
851
852 /*
853 * BCLK divide ratio
854 * 0: 1.5
855 * 1: 1
856 * 2: 2
857 * ...
858 * 254: 254
859 * 255: 255
860 */
861 if (dac33->fifo_mode)
862 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C,
863 dac33->burst_bclkdiv);
864 else
865 dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);
866
867 switch (dac33->fifo_mode) {
868 case DAC33_FIFO_MODE1:
869 dac33_write16(codec, DAC33_ATHR_MSB,
870 DAC33_THRREG(dac33->alarm_threshold));
871 break;
872 case DAC33_FIFO_MODE7:
873 /*
874 * Configure the threshold levels, and leave 10 sample space
875 * at the bottom, and also at the top of the FIFO
876 */
877 dac33_write16(codec, DAC33_UTHR_MSB,
878 DAC33_THRREG(DAC33_BUFFER_SIZE_SAMPLES - 10));
879 dac33_write16(codec, DAC33_LTHR_MSB,
880 DAC33_THRREG(10));
881 break;
882 default:
883 break;
884 }
885
886 mutex_unlock(&dac33->mutex);
887
888 return 0;
889 }
890
891 static void dac33_calculate_times(struct snd_pcm_substream *substream)
892 {
893 struct snd_soc_pcm_runtime *rtd = substream->private_data;
894 struct snd_soc_device *socdev = rtd->socdev;
895 struct snd_soc_codec *codec = socdev->card->codec;
896 struct tlv320dac33_priv *dac33 = codec->private_data;
897 unsigned int nsample_limit;
898
899 /* Number of samples (16bit, stereo) in one period */
900 dac33->nsample_min = snd_pcm_lib_period_bytes(substream) / 4;
901
902 /* Number of samples (16bit, stereo) in ALSA buffer */
903 dac33->nsample_max = snd_pcm_lib_buffer_bytes(substream) / 4;
904 /* Subtract one period from the total */
905 dac33->nsample_max -= dac33->nsample_min;
906
907 /* Number of samples for LATENCY_TIME_MS / 2 */
908 dac33->alarm_threshold = substream->runtime->rate /
909 (1000 / (LATENCY_TIME_MS / 2));
910
911 /* Find and fix up the lowest nsmaple limit */
912 nsample_limit = substream->runtime->rate / (1000 / LATENCY_TIME_MS);
913
914 if (dac33->nsample_min < nsample_limit)
915 dac33->nsample_min = nsample_limit;
916
917 if (dac33->nsample < dac33->nsample_min)
918 dac33->nsample = dac33->nsample_min;
919
920 /*
921 * Find and fix up the highest nsmaple limit
922 * In order to not overflow the DAC33 buffer substract the
923 * alarm_threshold value from the size of the DAC33 buffer
924 */
925 nsample_limit = DAC33_BUFFER_SIZE_SAMPLES - dac33->alarm_threshold;
926
927 if (dac33->nsample_max > nsample_limit)
928 dac33->nsample_max = nsample_limit;
929
930 if (dac33->nsample > dac33->nsample_max)
931 dac33->nsample = dac33->nsample_max;
932 }
933
934 static int dac33_pcm_prepare(struct snd_pcm_substream *substream,
935 struct snd_soc_dai *dai)
936 {
937 dac33_calculate_times(substream);
938 dac33_prepare_chip(substream);
939
940 return 0;
941 }
942
943 static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
944 struct snd_soc_dai *dai)
945 {
946 struct snd_soc_pcm_runtime *rtd = substream->private_data;
947 struct snd_soc_device *socdev = rtd->socdev;
948 struct snd_soc_codec *codec = socdev->card->codec;
949 struct tlv320dac33_priv *dac33 = codec->private_data;
950 int ret = 0;
951
952 switch (cmd) {
953 case SNDRV_PCM_TRIGGER_START:
954 case SNDRV_PCM_TRIGGER_RESUME:
955 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
956 if (dac33->fifo_mode) {
957 dac33->state = DAC33_PREFILL;
958 queue_work(dac33->dac33_wq, &dac33->work);
959 }
960 break;
961 case SNDRV_PCM_TRIGGER_STOP:
962 case SNDRV_PCM_TRIGGER_SUSPEND:
963 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
964 if (dac33->fifo_mode) {
965 dac33->state = DAC33_FLUSH;
966 queue_work(dac33->dac33_wq, &dac33->work);
967 }
968 break;
969 default:
970 ret = -EINVAL;
971 }
972
973 return ret;
974 }
975
976 static int dac33_set_dai_sysclk(struct snd_soc_dai *codec_dai,
977 int clk_id, unsigned int freq, int dir)
978 {
979 struct snd_soc_codec *codec = codec_dai->codec;
980 struct tlv320dac33_priv *dac33 = codec->private_data;
981 u8 ioc_reg, asrcb_reg;
982
983 ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
984 asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B);
985 switch (clk_id) {
986 case TLV320DAC33_MCLK:
987 ioc_reg |= DAC33_REFSEL;
988 asrcb_reg |= DAC33_SRCREFSEL;
989 break;
990 case TLV320DAC33_SLEEPCLK:
991 ioc_reg &= ~DAC33_REFSEL;
992 asrcb_reg &= ~DAC33_SRCREFSEL;
993 break;
994 default:
995 dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id);
996 break;
997 }
998 dac33->refclk = freq;
999
1000 dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg);
1001 dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg);
1002
1003 return 0;
1004 }
1005
1006 static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
1007 unsigned int fmt)
1008 {
1009 struct snd_soc_codec *codec = codec_dai->codec;
1010 struct tlv320dac33_priv *dac33 = codec->private_data;
1011 u8 aictrl_a, aictrl_b;
1012
1013 aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
1014 aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
1015 /* set master/slave audio interface */
1016 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1017 case SND_SOC_DAIFMT_CBM_CFM:
1018 /* Codec Master */
1019 aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
1020 break;
1021 case SND_SOC_DAIFMT_CBS_CFS:
1022 /* Codec Slave */
1023 if (dac33->fifo_mode) {
1024 dev_err(codec->dev, "FIFO mode requires master mode\n");
1025 return -EINVAL;
1026 } else
1027 aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
1028 break;
1029 default:
1030 return -EINVAL;
1031 }
1032
1033 aictrl_a &= ~DAC33_AFMT_MASK;
1034 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
1035 case SND_SOC_DAIFMT_I2S:
1036 aictrl_a |= DAC33_AFMT_I2S;
1037 break;
1038 case SND_SOC_DAIFMT_DSP_A:
1039 aictrl_a |= DAC33_AFMT_DSP;
1040 aictrl_b &= ~DAC33_DATA_DELAY_MASK;
1041 aictrl_b |= DAC33_DATA_DELAY(1); /* 1 bit delay */
1042 break;
1043 case SND_SOC_DAIFMT_DSP_B:
1044 aictrl_a |= DAC33_AFMT_DSP;
1045 aictrl_b &= ~DAC33_DATA_DELAY_MASK; /* No delay */
1046 break;
1047 case SND_SOC_DAIFMT_RIGHT_J:
1048 aictrl_a |= DAC33_AFMT_RIGHT_J;
1049 break;
1050 case SND_SOC_DAIFMT_LEFT_J:
1051 aictrl_a |= DAC33_AFMT_LEFT_J;
1052 break;
1053 default:
1054 dev_err(codec->dev, "Unsupported format (%u)\n",
1055 fmt & SND_SOC_DAIFMT_FORMAT_MASK);
1056 return -EINVAL;
1057 }
1058
1059 dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
1060 dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
1061
1062 return 0;
1063 }
1064
1065 static void dac33_init_chip(struct snd_soc_codec *codec)
1066 {
1067 /* 44-46: DAC Control Registers */
1068 /* A : DAC sample rate Fsref/1.5 */
1069 dac33_write(codec, DAC33_DAC_CTRL_A, DAC33_DACRATE(1));
1070 /* B : DAC src=normal, not muted */
1071 dac33_write(codec, DAC33_DAC_CTRL_B, DAC33_DACSRCR_RIGHT |
1072 DAC33_DACSRCL_LEFT);
1073 /* C : (defaults) */
1074 dac33_write(codec, DAC33_DAC_CTRL_C, 0x00);
1075
1076 /* 64-65 : L&R DAC power control
1077 Line In -> OUT 1V/V Gain, DAC -> OUT 4V/V Gain*/
1078 dac33_write(codec, DAC33_LDAC_PWR_CTRL, DAC33_LROUT_GAIN(2));
1079 dac33_write(codec, DAC33_RDAC_PWR_CTRL, DAC33_LROUT_GAIN(2));
1080
1081 /* 73 : volume soft stepping control,
1082 clock source = internal osc (?) */
1083 dac33_write(codec, DAC33_ANA_VOL_SOFT_STEP_CTRL, DAC33_VOLCLKEN);
1084
1085 /* 66 : LOP/LOM Modes */
1086 dac33_write(codec, DAC33_OUT_AMP_CM_CTRL, 0xff);
1087
1088 /* 68 : LOM inverted from LOP */
1089 dac33_write(codec, DAC33_OUT_AMP_CTRL, (3<<2));
1090
1091 dac33_write(codec, DAC33_PWR_CTRL, DAC33_PDNALLB);
1092 }
1093
1094 static int dac33_soc_probe(struct platform_device *pdev)
1095 {
1096 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1097 struct snd_soc_codec *codec;
1098 struct tlv320dac33_priv *dac33;
1099 int ret = 0;
1100
1101 BUG_ON(!tlv320dac33_codec);
1102
1103 codec = tlv320dac33_codec;
1104 socdev->card->codec = codec;
1105 dac33 = codec->private_data;
1106
1107 /* Power up the codec */
1108 dac33_hard_power(codec, 1);
1109 /* Set default configuration */
1110 dac33_init_chip(codec);
1111
1112 /* register pcms */
1113 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
1114 if (ret < 0) {
1115 dev_err(codec->dev, "failed to create pcms\n");
1116 goto pcm_err;
1117 }
1118
1119 snd_soc_add_controls(codec, dac33_snd_controls,
1120 ARRAY_SIZE(dac33_snd_controls));
1121 /* Only add the nSample controls, if we have valid IRQ number */
1122 if (dac33->irq >= 0)
1123 snd_soc_add_controls(codec, dac33_nsample_snd_controls,
1124 ARRAY_SIZE(dac33_nsample_snd_controls));
1125
1126 dac33_add_widgets(codec);
1127
1128 /* power on device */
1129 dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1130
1131 /* Bias level configuration has enabled regulator an extra time */
1132 regulator_bulk_disable(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1133
1134 return 0;
1135
1136 pcm_err:
1137 dac33_hard_power(codec, 0);
1138 return ret;
1139 }
1140
1141 static int dac33_soc_remove(struct platform_device *pdev)
1142 {
1143 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1144 struct snd_soc_codec *codec = socdev->card->codec;
1145
1146 dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1147
1148 snd_soc_free_pcms(socdev);
1149 snd_soc_dapm_free(socdev);
1150
1151 return 0;
1152 }
1153
1154 static int dac33_soc_suspend(struct platform_device *pdev, pm_message_t state)
1155 {
1156 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1157 struct snd_soc_codec *codec = socdev->card->codec;
1158
1159 dac33_set_bias_level(codec, SND_SOC_BIAS_OFF);
1160
1161 return 0;
1162 }
1163
1164 static int dac33_soc_resume(struct platform_device *pdev)
1165 {
1166 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1167 struct snd_soc_codec *codec = socdev->card->codec;
1168
1169 dac33_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1170 dac33_set_bias_level(codec, codec->suspend_bias_level);
1171
1172 return 0;
1173 }
1174
1175 struct snd_soc_codec_device soc_codec_dev_tlv320dac33 = {
1176 .probe = dac33_soc_probe,
1177 .remove = dac33_soc_remove,
1178 .suspend = dac33_soc_suspend,
1179 .resume = dac33_soc_resume,
1180 };
1181 EXPORT_SYMBOL_GPL(soc_codec_dev_tlv320dac33);
1182
1183 #define DAC33_RATES (SNDRV_PCM_RATE_44100 | \
1184 SNDRV_PCM_RATE_48000)
1185 #define DAC33_FORMATS SNDRV_PCM_FMTBIT_S16_LE
1186
1187 static struct snd_soc_dai_ops dac33_dai_ops = {
1188 .shutdown = dac33_shutdown,
1189 .hw_params = dac33_hw_params,
1190 .prepare = dac33_pcm_prepare,
1191 .trigger = dac33_pcm_trigger,
1192 .set_sysclk = dac33_set_dai_sysclk,
1193 .set_fmt = dac33_set_dai_fmt,
1194 };
1195
1196 struct snd_soc_dai dac33_dai = {
1197 .name = "tlv320dac33",
1198 .playback = {
1199 .stream_name = "Playback",
1200 .channels_min = 2,
1201 .channels_max = 2,
1202 .rates = DAC33_RATES,
1203 .formats = DAC33_FORMATS,},
1204 .ops = &dac33_dai_ops,
1205 };
1206 EXPORT_SYMBOL_GPL(dac33_dai);
1207
1208 static int __devinit dac33_i2c_probe(struct i2c_client *client,
1209 const struct i2c_device_id *id)
1210 {
1211 struct tlv320dac33_platform_data *pdata;
1212 struct tlv320dac33_priv *dac33;
1213 struct snd_soc_codec *codec;
1214 int ret, i;
1215
1216 if (client->dev.platform_data == NULL) {
1217 dev_err(&client->dev, "Platform data not set\n");
1218 return -ENODEV;
1219 }
1220 pdata = client->dev.platform_data;
1221
1222 dac33 = kzalloc(sizeof(struct tlv320dac33_priv), GFP_KERNEL);
1223 if (dac33 == NULL)
1224 return -ENOMEM;
1225
1226 codec = &dac33->codec;
1227 codec->private_data = dac33;
1228 codec->control_data = client;
1229
1230 mutex_init(&codec->mutex);
1231 mutex_init(&dac33->mutex);
1232 INIT_LIST_HEAD(&codec->dapm_widgets);
1233 INIT_LIST_HEAD(&codec->dapm_paths);
1234
1235 codec->name = "tlv320dac33";
1236 codec->owner = THIS_MODULE;
1237 codec->read = dac33_read_reg_cache;
1238 codec->write = dac33_write_locked;
1239 codec->hw_write = (hw_write_t) i2c_master_send;
1240 codec->bias_level = SND_SOC_BIAS_OFF;
1241 codec->set_bias_level = dac33_set_bias_level;
1242 codec->dai = &dac33_dai;
1243 codec->num_dai = 1;
1244 codec->reg_cache_size = ARRAY_SIZE(dac33_reg);
1245 codec->reg_cache = kmemdup(dac33_reg, ARRAY_SIZE(dac33_reg),
1246 GFP_KERNEL);
1247 if (codec->reg_cache == NULL) {
1248 ret = -ENOMEM;
1249 goto error_reg;
1250 }
1251
1252 i2c_set_clientdata(client, dac33);
1253
1254 dac33->power_gpio = pdata->power_gpio;
1255 dac33->burst_bclkdiv = pdata->burst_bclkdiv;
1256 dac33->irq = client->irq;
1257 dac33->nsample = NSAMPLE_MAX;
1258 /* Disable FIFO use by default */
1259 dac33->fifo_mode = DAC33_FIFO_BYPASS;
1260
1261 tlv320dac33_codec = codec;
1262
1263 codec->dev = &client->dev;
1264 dac33_dai.dev = codec->dev;
1265
1266 /* Check if the reset GPIO number is valid and request it */
1267 if (dac33->power_gpio >= 0) {
1268 ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
1269 if (ret < 0) {
1270 dev_err(codec->dev,
1271 "Failed to request reset GPIO (%d)\n",
1272 dac33->power_gpio);
1273 snd_soc_unregister_dai(&dac33_dai);
1274 snd_soc_unregister_codec(codec);
1275 goto error_gpio;
1276 }
1277 gpio_direction_output(dac33->power_gpio, 0);
1278 } else {
1279 dac33->chip_power = 1;
1280 }
1281
1282 /* Check if the IRQ number is valid and request it */
1283 if (dac33->irq >= 0) {
1284 ret = request_irq(dac33->irq, dac33_interrupt_handler,
1285 IRQF_TRIGGER_RISING | IRQF_DISABLED,
1286 codec->name, codec);
1287 if (ret < 0) {
1288 dev_err(codec->dev, "Could not request IRQ%d (%d)\n",
1289 dac33->irq, ret);
1290 dac33->irq = -1;
1291 }
1292 if (dac33->irq != -1) {
1293 /* Setup work queue */
1294 dac33->dac33_wq =
1295 create_singlethread_workqueue("tlv320dac33");
1296 if (dac33->dac33_wq == NULL) {
1297 free_irq(dac33->irq, &dac33->codec);
1298 ret = -ENOMEM;
1299 goto error_wq;
1300 }
1301
1302 INIT_WORK(&dac33->work, dac33_work);
1303 }
1304 }
1305
1306 for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++)
1307 dac33->supplies[i].supply = dac33_supply_names[i];
1308
1309 ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(dac33->supplies),
1310 dac33->supplies);
1311
1312 if (ret != 0) {
1313 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
1314 goto err_get;
1315 }
1316
1317 ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies),
1318 dac33->supplies);
1319 if (ret != 0) {
1320 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
1321 goto err_enable;
1322 }
1323
1324 ret = snd_soc_register_codec(codec);
1325 if (ret != 0) {
1326 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
1327 goto error_codec;
1328 }
1329
1330 ret = snd_soc_register_dai(&dac33_dai);
1331 if (ret != 0) {
1332 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
1333 snd_soc_unregister_codec(codec);
1334 goto error_codec;
1335 }
1336
1337 /* Shut down the codec for now */
1338 dac33_hard_power(codec, 0);
1339
1340 return ret;
1341
1342 error_codec:
1343 regulator_bulk_disable(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1344 err_enable:
1345 regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1346 err_get:
1347 if (dac33->irq >= 0) {
1348 free_irq(dac33->irq, &dac33->codec);
1349 destroy_workqueue(dac33->dac33_wq);
1350 }
1351 error_wq:
1352 if (dac33->power_gpio >= 0)
1353 gpio_free(dac33->power_gpio);
1354 error_gpio:
1355 kfree(codec->reg_cache);
1356 error_reg:
1357 tlv320dac33_codec = NULL;
1358 kfree(dac33);
1359
1360 return ret;
1361 }
1362
1363 static int __devexit dac33_i2c_remove(struct i2c_client *client)
1364 {
1365 struct tlv320dac33_priv *dac33;
1366
1367 dac33 = i2c_get_clientdata(client);
1368 dac33_hard_power(&dac33->codec, 0);
1369
1370 if (dac33->power_gpio >= 0)
1371 gpio_free(dac33->power_gpio);
1372 if (dac33->irq >= 0)
1373 free_irq(dac33->irq, &dac33->codec);
1374
1375 regulator_bulk_free(ARRAY_SIZE(dac33->supplies), dac33->supplies);
1376
1377 destroy_workqueue(dac33->dac33_wq);
1378 snd_soc_unregister_dai(&dac33_dai);
1379 snd_soc_unregister_codec(&dac33->codec);
1380 kfree(dac33->codec.reg_cache);
1381 kfree(dac33);
1382 tlv320dac33_codec = NULL;
1383
1384 return 0;
1385 }
1386
1387 static const struct i2c_device_id tlv320dac33_i2c_id[] = {
1388 {
1389 .name = "tlv320dac33",
1390 .driver_data = 0,
1391 },
1392 { },
1393 };
1394
1395 static struct i2c_driver tlv320dac33_i2c_driver = {
1396 .driver = {
1397 .name = "tlv320dac33",
1398 .owner = THIS_MODULE,
1399 },
1400 .probe = dac33_i2c_probe,
1401 .remove = __devexit_p(dac33_i2c_remove),
1402 .id_table = tlv320dac33_i2c_id,
1403 };
1404
1405 static int __init dac33_module_init(void)
1406 {
1407 int r;
1408 r = i2c_add_driver(&tlv320dac33_i2c_driver);
1409 if (r < 0) {
1410 printk(KERN_ERR "DAC33: driver registration failed\n");
1411 return r;
1412 }
1413 return 0;
1414 }
1415 module_init(dac33_module_init);
1416
1417 static void __exit dac33_module_exit(void)
1418 {
1419 i2c_del_driver(&tlv320dac33_i2c_driver);
1420 }
1421 module_exit(dac33_module_exit);
1422
1423
1424 MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
1425 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@nokia.com>");
1426 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)