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TOMOYO Linux Cross Reference
Linux/sound/soc/codecs/tlv320aic23.c

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  1 /*
  2  * ALSA SoC TLV320AIC23 codec driver
  3  *
  4  * Author:      Arun KS, <arunks@mistralsolutions.com>
  5  * Copyright:   (C) 2008 Mistral Solutions Pvt Ltd.,
  6  *
  7  * Based on sound/soc/codecs/wm8731.c by Richard Purdie
  8  *
  9  * This program is free software; you can redistribute it and/or modify
 10  * it under the terms of the GNU General Public License version 2 as
 11  * published by the Free Software Foundation.
 12  *
 13  * Notes:
 14  *  The AIC23 is a driver for a low power stereo audio
 15  *  codec tlv320aic23
 16  *
 17  *  The machine layer should disable unsupported inputs/outputs by
 18  *  snd_soc_dapm_disable_pin(codec, "LHPOUT"), etc.
 19  */
 20 
 21 #include <linux/module.h>
 22 #include <linux/moduleparam.h>
 23 #include <linux/init.h>
 24 #include <linux/delay.h>
 25 #include <linux/pm.h>
 26 #include <linux/i2c.h>
 27 #include <linux/slab.h>
 28 #include <sound/core.h>
 29 #include <sound/pcm.h>
 30 #include <sound/pcm_params.h>
 31 #include <sound/soc.h>
 32 #include <sound/tlv.h>
 33 #include <sound/initval.h>
 34 
 35 #include "tlv320aic23.h"
 36 
 37 #define AIC23_VERSION "0.1"
 38 
 39 /*
 40  * AIC23 register cache
 41  */
 42 static const u16 tlv320aic23_reg[] = {
 43         0x0097, 0x0097, 0x00F9, 0x00F9, /* 0 */
 44         0x001A, 0x0004, 0x0007, 0x0001, /* 4 */
 45         0x0020, 0x0000, 0x0000, 0x0000, /* 8 */
 46         0x0000, 0x0000, 0x0000, 0x0000, /* 12 */
 47 };
 48 
 49 static const char *rec_src_text[] = { "Line", "Mic" };
 50 static const char *deemph_text[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 51 
 52 static const struct soc_enum rec_src_enum =
 53         SOC_ENUM_SINGLE(TLV320AIC23_ANLG, 2, 2, rec_src_text);
 54 
 55 static const struct snd_kcontrol_new tlv320aic23_rec_src_mux_controls =
 56 SOC_DAPM_ENUM("Input Select", rec_src_enum);
 57 
 58 static const struct soc_enum tlv320aic23_rec_src =
 59         SOC_ENUM_SINGLE(TLV320AIC23_ANLG, 2, 2, rec_src_text);
 60 static const struct soc_enum tlv320aic23_deemph =
 61         SOC_ENUM_SINGLE(TLV320AIC23_DIGT, 1, 4, deemph_text);
 62 
 63 static const DECLARE_TLV_DB_SCALE(out_gain_tlv, -12100, 100, 0);
 64 static const DECLARE_TLV_DB_SCALE(input_gain_tlv, -1725, 75, 0);
 65 static const DECLARE_TLV_DB_SCALE(sidetone_vol_tlv, -1800, 300, 0);
 66 
 67 static int snd_soc_tlv320aic23_put_volsw(struct snd_kcontrol *kcontrol,
 68         struct snd_ctl_elem_value *ucontrol)
 69 {
 70         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 71         u16 val, reg;
 72 
 73         val = (ucontrol->value.integer.value[0] & 0x07);
 74 
 75         /* linear conversion to userspace
 76         * 000   =       -6db
 77         * 001   =       -9db
 78         * 010   =       -12db
 79         * 011   =       -18db (Min)
 80         * 100   =       0db (Max)
 81         */
 82         val = (val >= 4) ? 4  : (3 - val);
 83 
 84         reg = snd_soc_read(codec, TLV320AIC23_ANLG) & (~0x1C0);
 85         snd_soc_write(codec, TLV320AIC23_ANLG, reg | (val << 6));
 86 
 87         return 0;
 88 }
 89 
 90 static int snd_soc_tlv320aic23_get_volsw(struct snd_kcontrol *kcontrol,
 91         struct snd_ctl_elem_value *ucontrol)
 92 {
 93         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 94         u16 val;
 95 
 96         val = snd_soc_read(codec, TLV320AIC23_ANLG) & (0x1C0);
 97         val = val >> 6;
 98         val = (val >= 4) ? 4  : (3 -  val);
 99         ucontrol->value.integer.value[0] = val;
100         return 0;
101 
102 }
103 
104 static const struct snd_kcontrol_new tlv320aic23_snd_controls[] = {
105         SOC_DOUBLE_R_TLV("Digital Playback Volume", TLV320AIC23_LCHNVOL,
106                          TLV320AIC23_RCHNVOL, 0, 127, 0, out_gain_tlv),
107         SOC_SINGLE("Digital Playback Switch", TLV320AIC23_DIGT, 3, 1, 1),
108         SOC_DOUBLE_R("Line Input Switch", TLV320AIC23_LINVOL,
109                      TLV320AIC23_RINVOL, 7, 1, 0),
110         SOC_DOUBLE_R_TLV("Line Input Volume", TLV320AIC23_LINVOL,
111                          TLV320AIC23_RINVOL, 0, 31, 0, input_gain_tlv),
112         SOC_SINGLE("Mic Input Switch", TLV320AIC23_ANLG, 1, 1, 1),
113         SOC_SINGLE("Mic Booster Switch", TLV320AIC23_ANLG, 0, 1, 0),
114         SOC_SINGLE_EXT_TLV("Sidetone Volume", TLV320AIC23_ANLG, 6, 4, 0,
115                            snd_soc_tlv320aic23_get_volsw,
116                            snd_soc_tlv320aic23_put_volsw, sidetone_vol_tlv),
117         SOC_ENUM("Playback De-emphasis", tlv320aic23_deemph),
118 };
119 
120 /* PGA Mixer controls for Line and Mic switch */
121 static const struct snd_kcontrol_new tlv320aic23_output_mixer_controls[] = {
122         SOC_DAPM_SINGLE("Line Bypass Switch", TLV320AIC23_ANLG, 3, 1, 0),
123         SOC_DAPM_SINGLE("Mic Sidetone Switch", TLV320AIC23_ANLG, 5, 1, 0),
124         SOC_DAPM_SINGLE("Playback Switch", TLV320AIC23_ANLG, 4, 1, 0),
125 };
126 
127 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
128         SND_SOC_DAPM_DAC("DAC", "Playback", TLV320AIC23_PWR, 3, 1),
129         SND_SOC_DAPM_ADC("ADC", "Capture", TLV320AIC23_PWR, 2, 1),
130         SND_SOC_DAPM_MUX("Capture Source", SND_SOC_NOPM, 0, 0,
131                          &tlv320aic23_rec_src_mux_controls),
132         SND_SOC_DAPM_MIXER("Output Mixer", TLV320AIC23_PWR, 4, 1,
133                            &tlv320aic23_output_mixer_controls[0],
134                            ARRAY_SIZE(tlv320aic23_output_mixer_controls)),
135         SND_SOC_DAPM_PGA("Line Input", TLV320AIC23_PWR, 0, 1, NULL, 0),
136         SND_SOC_DAPM_PGA("Mic Input", TLV320AIC23_PWR, 1, 1, NULL, 0),
137 
138         SND_SOC_DAPM_OUTPUT("LHPOUT"),
139         SND_SOC_DAPM_OUTPUT("RHPOUT"),
140         SND_SOC_DAPM_OUTPUT("LOUT"),
141         SND_SOC_DAPM_OUTPUT("ROUT"),
142 
143         SND_SOC_DAPM_INPUT("LLINEIN"),
144         SND_SOC_DAPM_INPUT("RLINEIN"),
145 
146         SND_SOC_DAPM_INPUT("MICIN"),
147 };
148 
149 static const struct snd_soc_dapm_route tlv320aic23_intercon[] = {
150         /* Output Mixer */
151         {"Output Mixer", "Line Bypass Switch", "Line Input"},
152         {"Output Mixer", "Playback Switch", "DAC"},
153         {"Output Mixer", "Mic Sidetone Switch", "Mic Input"},
154 
155         /* Outputs */
156         {"RHPOUT", NULL, "Output Mixer"},
157         {"LHPOUT", NULL, "Output Mixer"},
158         {"LOUT", NULL, "Output Mixer"},
159         {"ROUT", NULL, "Output Mixer"},
160 
161         /* Inputs */
162         {"Line Input", "NULL", "LLINEIN"},
163         {"Line Input", "NULL", "RLINEIN"},
164 
165         {"Mic Input", "NULL", "MICIN"},
166 
167         /* input mux */
168         {"Capture Source", "Line", "Line Input"},
169         {"Capture Source", "Mic", "Mic Input"},
170         {"ADC", NULL, "Capture Source"},
171 
172 };
173 
174 /* AIC23 driver data */
175 struct aic23 {
176         enum snd_soc_control_type control_type;
177         int mclk;
178         int requested_adc;
179         int requested_dac;
180 };
181 
182 /*
183  * Common Crystals used
184  * 11.2896 Mhz /128 = *88.2k  /192 = 58.8k
185  * 12.0000 Mhz /125 = *96k    /136 = 88.235K
186  * 12.2880 Mhz /128 = *96k    /192 = 64k
187  * 16.9344 Mhz /128 = 132.3k /192 = *88.2k
188  * 18.4320 Mhz /128 = 144k   /192 = *96k
189  */
190 
191 /*
192  * Normal BOSR 0-256/2 = 128, 1-384/2 = 192
193  * USB BOSR 0-250/2 = 125, 1-272/2 = 136
194  */
195 static const int bosr_usb_divisor_table[] = {
196         128, 125, 192, 136
197 };
198 #define LOWER_GROUP ((1<<0) | (1<<1) | (1<<2) | (1<<3) | (1<<6) | (1<<7))
199 #define UPPER_GROUP ((1<<8) | (1<<9) | (1<<10) | (1<<11)        | (1<<15))
200 static const unsigned short sr_valid_mask[] = {
201         LOWER_GROUP|UPPER_GROUP,        /* Normal, bosr - 0*/
202         LOWER_GROUP,                    /* Usb, bosr - 0*/
203         LOWER_GROUP|UPPER_GROUP,        /* Normal, bosr - 1*/
204         UPPER_GROUP,                    /* Usb, bosr - 1*/
205 };
206 /*
207  * Every divisor is a factor of 11*12
208  */
209 #define SR_MULT (11*12)
210 #define A(x) (SR_MULT/x)
211 static const unsigned char sr_adc_mult_table[] = {
212         A(2), A(2), A(12), A(12),  0, 0, A(3), A(1),
213         A(2), A(2), A(11), A(11),  0, 0, 0, A(1)
214 };
215 static const unsigned char sr_dac_mult_table[] = {
216         A(2), A(12), A(2), A(12),  0, 0, A(3), A(1),
217         A(2), A(11), A(2), A(11),  0, 0, 0, A(1)
218 };
219 
220 static unsigned get_score(int adc, int adc_l, int adc_h, int need_adc,
221                 int dac, int dac_l, int dac_h, int need_dac)
222 {
223         if ((adc >= adc_l) && (adc <= adc_h) &&
224                         (dac >= dac_l) && (dac <= dac_h)) {
225                 int diff_adc = need_adc - adc;
226                 int diff_dac = need_dac - dac;
227                 return abs(diff_adc) + abs(diff_dac);
228         }
229         return UINT_MAX;
230 }
231 
232 static int find_rate(int mclk, u32 need_adc, u32 need_dac)
233 {
234         int i, j;
235         int best_i = -1;
236         int best_j = -1;
237         int best_div = 0;
238         unsigned best_score = UINT_MAX;
239         int adc_l, adc_h, dac_l, dac_h;
240 
241         need_adc *= SR_MULT;
242         need_dac *= SR_MULT;
243         /*
244          * rates given are +/- 1/32
245          */
246         adc_l = need_adc - (need_adc >> 5);
247         adc_h = need_adc + (need_adc >> 5);
248         dac_l = need_dac - (need_dac >> 5);
249         dac_h = need_dac + (need_dac >> 5);
250         for (i = 0; i < ARRAY_SIZE(bosr_usb_divisor_table); i++) {
251                 int base = mclk / bosr_usb_divisor_table[i];
252                 int mask = sr_valid_mask[i];
253                 for (j = 0; j < ARRAY_SIZE(sr_adc_mult_table);
254                                 j++, mask >>= 1) {
255                         int adc;
256                         int dac;
257                         int score;
258                         if ((mask & 1) == 0)
259                                 continue;
260                         adc = base * sr_adc_mult_table[j];
261                         dac = base * sr_dac_mult_table[j];
262                         score = get_score(adc, adc_l, adc_h, need_adc,
263                                         dac, dac_l, dac_h, need_dac);
264                         if (best_score > score) {
265                                 best_score = score;
266                                 best_i = i;
267                                 best_j = j;
268                                 best_div = 0;
269                         }
270                         score = get_score((adc >> 1), adc_l, adc_h, need_adc,
271                                         (dac >> 1), dac_l, dac_h, need_dac);
272                         /* prefer to have a /2 */
273                         if ((score != UINT_MAX) && (best_score >= score)) {
274                                 best_score = score;
275                                 best_i = i;
276                                 best_j = j;
277                                 best_div = 1;
278                         }
279                 }
280         }
281         return (best_j << 2) | best_i | (best_div << TLV320AIC23_CLKIN_SHIFT);
282 }
283 
284 #ifdef DEBUG
285 static void get_current_sample_rates(struct snd_soc_codec *codec, int mclk,
286                 u32 *sample_rate_adc, u32 *sample_rate_dac)
287 {
288         int src = snd_soc_read(codec, TLV320AIC23_SRATE);
289         int sr = (src >> 2) & 0x0f;
290         int val = (mclk / bosr_usb_divisor_table[src & 3]);
291         int adc = (val * sr_adc_mult_table[sr]) / SR_MULT;
292         int dac = (val * sr_dac_mult_table[sr]) / SR_MULT;
293         if (src & TLV320AIC23_CLKIN_HALF) {
294                 adc >>= 1;
295                 dac >>= 1;
296         }
297         *sample_rate_adc = adc;
298         *sample_rate_dac = dac;
299 }
300 #endif
301 
302 static int set_sample_rate_control(struct snd_soc_codec *codec, int mclk,
303                 u32 sample_rate_adc, u32 sample_rate_dac)
304 {
305         /* Search for the right sample rate */
306         int data = find_rate(mclk, sample_rate_adc, sample_rate_dac);
307         if (data < 0) {
308                 printk(KERN_ERR "%s:Invalid rate %u,%u requested\n",
309                                 __func__, sample_rate_adc, sample_rate_dac);
310                 return -EINVAL;
311         }
312         snd_soc_write(codec, TLV320AIC23_SRATE, data);
313 #ifdef DEBUG
314         {
315                 u32 adc, dac;
316                 get_current_sample_rates(codec, mclk, &adc, &dac);
317                 printk(KERN_DEBUG "actual samplerate = %u,%u reg=%x\n",
318                         adc, dac, data);
319         }
320 #endif
321         return 0;
322 }
323 
324 static int tlv320aic23_hw_params(struct snd_pcm_substream *substream,
325                                  struct snd_pcm_hw_params *params,
326                                  struct snd_soc_dai *dai)
327 {
328         struct snd_soc_pcm_runtime *rtd = substream->private_data;
329         struct snd_soc_codec *codec = rtd->codec;
330         u16 iface_reg;
331         int ret;
332         struct aic23 *aic23 = snd_soc_codec_get_drvdata(codec);
333         u32 sample_rate_adc = aic23->requested_adc;
334         u32 sample_rate_dac = aic23->requested_dac;
335         u32 sample_rate = params_rate(params);
336 
337         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
338                 aic23->requested_dac = sample_rate_dac = sample_rate;
339                 if (!sample_rate_adc)
340                         sample_rate_adc = sample_rate;
341         } else {
342                 aic23->requested_adc = sample_rate_adc = sample_rate;
343                 if (!sample_rate_dac)
344                         sample_rate_dac = sample_rate;
345         }
346         ret = set_sample_rate_control(codec, aic23->mclk, sample_rate_adc,
347                         sample_rate_dac);
348         if (ret < 0)
349                 return ret;
350 
351         iface_reg = snd_soc_read(codec, TLV320AIC23_DIGT_FMT) & ~(0x03 << 2);
352 
353         switch (params_format(params)) {
354         case SNDRV_PCM_FORMAT_S16_LE:
355                 break;
356         case SNDRV_PCM_FORMAT_S20_3LE:
357                 iface_reg |= (0x01 << 2);
358                 break;
359         case SNDRV_PCM_FORMAT_S24_LE:
360                 iface_reg |= (0x02 << 2);
361                 break;
362         case SNDRV_PCM_FORMAT_S32_LE:
363                 iface_reg |= (0x03 << 2);
364                 break;
365         }
366         snd_soc_write(codec, TLV320AIC23_DIGT_FMT, iface_reg);
367 
368         return 0;
369 }
370 
371 static int tlv320aic23_pcm_prepare(struct snd_pcm_substream *substream,
372                                    struct snd_soc_dai *dai)
373 {
374         struct snd_soc_pcm_runtime *rtd = substream->private_data;
375         struct snd_soc_codec *codec = rtd->codec;
376 
377         /* set active */
378         snd_soc_write(codec, TLV320AIC23_ACTIVE, 0x0001);
379 
380         return 0;
381 }
382 
383 static void tlv320aic23_shutdown(struct snd_pcm_substream *substream,
384                                  struct snd_soc_dai *dai)
385 {
386         struct snd_soc_pcm_runtime *rtd = substream->private_data;
387         struct snd_soc_codec *codec = rtd->codec;
388         struct aic23 *aic23 = snd_soc_codec_get_drvdata(codec);
389 
390         /* deactivate */
391         if (!codec->active) {
392                 udelay(50);
393                 snd_soc_write(codec, TLV320AIC23_ACTIVE, 0x0);
394         }
395         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
396                 aic23->requested_dac = 0;
397         else
398                 aic23->requested_adc = 0;
399 }
400 
401 static int tlv320aic23_mute(struct snd_soc_dai *dai, int mute)
402 {
403         struct snd_soc_codec *codec = dai->codec;
404         u16 reg;
405 
406         reg = snd_soc_read(codec, TLV320AIC23_DIGT);
407         if (mute)
408                 reg |= TLV320AIC23_DACM_MUTE;
409 
410         else
411                 reg &= ~TLV320AIC23_DACM_MUTE;
412 
413         snd_soc_write(codec, TLV320AIC23_DIGT, reg);
414 
415         return 0;
416 }
417 
418 static int tlv320aic23_set_dai_fmt(struct snd_soc_dai *codec_dai,
419                                    unsigned int fmt)
420 {
421         struct snd_soc_codec *codec = codec_dai->codec;
422         u16 iface_reg;
423 
424         iface_reg = snd_soc_read(codec, TLV320AIC23_DIGT_FMT) & (~0x03);
425 
426         /* set master/slave audio interface */
427         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
428         case SND_SOC_DAIFMT_CBM_CFM:
429                 iface_reg |= TLV320AIC23_MS_MASTER;
430                 break;
431         case SND_SOC_DAIFMT_CBS_CFS:
432                 iface_reg &= ~TLV320AIC23_MS_MASTER;
433                 break;
434         default:
435                 return -EINVAL;
436 
437         }
438 
439         /* interface format */
440         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
441         case SND_SOC_DAIFMT_I2S:
442                 iface_reg |= TLV320AIC23_FOR_I2S;
443                 break;
444         case SND_SOC_DAIFMT_DSP_A:
445                 iface_reg |= TLV320AIC23_LRP_ON;
446         case SND_SOC_DAIFMT_DSP_B:
447                 iface_reg |= TLV320AIC23_FOR_DSP;
448                 break;
449         case SND_SOC_DAIFMT_RIGHT_J:
450                 break;
451         case SND_SOC_DAIFMT_LEFT_J:
452                 iface_reg |= TLV320AIC23_FOR_LJUST;
453                 break;
454         default:
455                 return -EINVAL;
456 
457         }
458 
459         snd_soc_write(codec, TLV320AIC23_DIGT_FMT, iface_reg);
460 
461         return 0;
462 }
463 
464 static int tlv320aic23_set_dai_sysclk(struct snd_soc_dai *codec_dai,
465                                       int clk_id, unsigned int freq, int dir)
466 {
467         struct aic23 *aic23 = snd_soc_dai_get_drvdata(codec_dai);
468         aic23->mclk = freq;
469         return 0;
470 }
471 
472 static int tlv320aic23_set_bias_level(struct snd_soc_codec *codec,
473                                       enum snd_soc_bias_level level)
474 {
475         u16 reg = snd_soc_read(codec, TLV320AIC23_PWR) & 0x17f;
476 
477         switch (level) {
478         case SND_SOC_BIAS_ON:
479                 /* vref/mid, osc on, dac unmute */
480                 reg &= ~(TLV320AIC23_DEVICE_PWR_OFF | TLV320AIC23_OSC_OFF | \
481                         TLV320AIC23_DAC_OFF);
482                 snd_soc_write(codec, TLV320AIC23_PWR, reg);
483                 break;
484         case SND_SOC_BIAS_PREPARE:
485                 break;
486         case SND_SOC_BIAS_STANDBY:
487                 /* everything off except vref/vmid, */
488                 snd_soc_write(codec, TLV320AIC23_PWR,
489                               reg | TLV320AIC23_CLK_OFF);
490                 break;
491         case SND_SOC_BIAS_OFF:
492                 /* everything off, dac mute, inactive */
493                 snd_soc_write(codec, TLV320AIC23_ACTIVE, 0x0);
494                 snd_soc_write(codec, TLV320AIC23_PWR, 0x1ff);
495                 break;
496         }
497         codec->dapm.bias_level = level;
498         return 0;
499 }
500 
501 #define AIC23_RATES     SNDRV_PCM_RATE_8000_96000
502 #define AIC23_FORMATS   (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
503                          SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE)
504 
505 static const struct snd_soc_dai_ops tlv320aic23_dai_ops = {
506         .prepare        = tlv320aic23_pcm_prepare,
507         .hw_params      = tlv320aic23_hw_params,
508         .shutdown       = tlv320aic23_shutdown,
509         .digital_mute   = tlv320aic23_mute,
510         .set_fmt        = tlv320aic23_set_dai_fmt,
511         .set_sysclk     = tlv320aic23_set_dai_sysclk,
512 };
513 
514 static struct snd_soc_dai_driver tlv320aic23_dai = {
515         .name = "tlv320aic23-hifi",
516         .playback = {
517                      .stream_name = "Playback",
518                      .channels_min = 2,
519                      .channels_max = 2,
520                      .rates = AIC23_RATES,
521                      .formats = AIC23_FORMATS,},
522         .capture = {
523                     .stream_name = "Capture",
524                     .channels_min = 2,
525                     .channels_max = 2,
526                     .rates = AIC23_RATES,
527                     .formats = AIC23_FORMATS,},
528         .ops = &tlv320aic23_dai_ops,
529 };
530 
531 static int tlv320aic23_suspend(struct snd_soc_codec *codec)
532 {
533         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_OFF);
534 
535         return 0;
536 }
537 
538 static int tlv320aic23_resume(struct snd_soc_codec *codec)
539 {
540         snd_soc_cache_sync(codec);
541         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
542 
543         return 0;
544 }
545 
546 static int tlv320aic23_probe(struct snd_soc_codec *codec)
547 {
548         struct aic23 *aic23 = snd_soc_codec_get_drvdata(codec);
549         int ret;
550 
551         printk(KERN_INFO "AIC23 Audio Codec %s\n", AIC23_VERSION);
552 
553         ret = snd_soc_codec_set_cache_io(codec, 7, 9, aic23->control_type);
554         if (ret < 0) {
555                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
556                 return ret;
557         }
558 
559         /* Reset codec */
560         snd_soc_write(codec, TLV320AIC23_RESET, 0);
561 
562         /* Write the register default value to cache for reserved registers,
563          * so the write to the these registers are suppressed by the cache
564          * restore code when it skips writes of default registers.
565          */
566         snd_soc_cache_write(codec, 0x0A, 0);
567         snd_soc_cache_write(codec, 0x0B, 0);
568         snd_soc_cache_write(codec, 0x0C, 0);
569         snd_soc_cache_write(codec, 0x0D, 0);
570         snd_soc_cache_write(codec, 0x0E, 0);
571 
572         /* power on device */
573         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
574 
575         snd_soc_write(codec, TLV320AIC23_DIGT, TLV320AIC23_DEEMP_44K);
576 
577         /* Unmute input */
578         snd_soc_update_bits(codec, TLV320AIC23_LINVOL,
579                             TLV320AIC23_LIM_MUTED, TLV320AIC23_LRS_ENABLED);
580 
581         snd_soc_update_bits(codec, TLV320AIC23_RINVOL,
582                             TLV320AIC23_LIM_MUTED, TLV320AIC23_LRS_ENABLED);
583 
584         snd_soc_update_bits(codec, TLV320AIC23_ANLG,
585                             TLV320AIC23_BYPASS_ON | TLV320AIC23_MICM_MUTED,
586                             0);
587 
588         /* Default output volume */
589         snd_soc_write(codec, TLV320AIC23_LCHNVOL,
590                       TLV320AIC23_DEFAULT_OUT_VOL & TLV320AIC23_OUT_VOL_MASK);
591         snd_soc_write(codec, TLV320AIC23_RCHNVOL,
592                       TLV320AIC23_DEFAULT_OUT_VOL & TLV320AIC23_OUT_VOL_MASK);
593 
594         snd_soc_write(codec, TLV320AIC23_ACTIVE, 0x1);
595 
596         snd_soc_add_codec_controls(codec, tlv320aic23_snd_controls,
597                                 ARRAY_SIZE(tlv320aic23_snd_controls));
598 
599         return 0;
600 }
601 
602 static int tlv320aic23_remove(struct snd_soc_codec *codec)
603 {
604         tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_OFF);
605         return 0;
606 }
607 
608 static struct snd_soc_codec_driver soc_codec_dev_tlv320aic23 = {
609         .reg_cache_size = ARRAY_SIZE(tlv320aic23_reg),
610         .reg_word_size = sizeof(u16),
611         .reg_cache_default = tlv320aic23_reg,
612         .probe = tlv320aic23_probe,
613         .remove = tlv320aic23_remove,
614         .suspend = tlv320aic23_suspend,
615         .resume = tlv320aic23_resume,
616         .set_bias_level = tlv320aic23_set_bias_level,
617         .dapm_widgets = tlv320aic23_dapm_widgets,
618         .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
619         .dapm_routes = tlv320aic23_intercon,
620         .num_dapm_routes = ARRAY_SIZE(tlv320aic23_intercon),
621 };
622 
623 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
624 /*
625  * If the i2c layer weren't so broken, we could pass this kind of data
626  * around
627  */
628 static int tlv320aic23_codec_probe(struct i2c_client *i2c,
629                                    const struct i2c_device_id *i2c_id)
630 {
631         struct aic23 *aic23;
632         int ret;
633 
634         if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
635                 return -EINVAL;
636 
637         aic23 = devm_kzalloc(&i2c->dev, sizeof(struct aic23), GFP_KERNEL);
638         if (aic23 == NULL)
639                 return -ENOMEM;
640 
641         i2c_set_clientdata(i2c, aic23);
642         aic23->control_type = SND_SOC_I2C;
643 
644         ret =  snd_soc_register_codec(&i2c->dev,
645                         &soc_codec_dev_tlv320aic23, &tlv320aic23_dai, 1);
646         return ret;
647 }
648 static int __exit tlv320aic23_i2c_remove(struct i2c_client *i2c)
649 {
650         snd_soc_unregister_codec(&i2c->dev);
651         return 0;
652 }
653 
654 static const struct i2c_device_id tlv320aic23_id[] = {
655         {"tlv320aic23", 0},
656         {}
657 };
658 
659 MODULE_DEVICE_TABLE(i2c, tlv320aic23_id);
660 
661 static struct i2c_driver tlv320aic23_i2c_driver = {
662         .driver = {
663                    .name = "tlv320aic23-codec",
664                    },
665         .probe = tlv320aic23_codec_probe,
666         .remove = __exit_p(tlv320aic23_i2c_remove),
667         .id_table = tlv320aic23_id,
668 };
669 
670 #endif
671 
672 static int __init tlv320aic23_modinit(void)
673 {
674         int ret;
675 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
676         ret = i2c_add_driver(&tlv320aic23_i2c_driver);
677         if (ret != 0) {
678                 printk(KERN_ERR "Failed to register TLV320AIC23 I2C driver: %d\n",
679                        ret);
680         }
681 #endif
682         return ret;
683 }
684 module_init(tlv320aic23_modinit);
685 
686 static void __exit tlv320aic23_exit(void)
687 {
688 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
689         i2c_del_driver(&tlv320aic23_i2c_driver);
690 #endif
691 }
692 module_exit(tlv320aic23_exit);
693 
694 MODULE_DESCRIPTION("ASoC TLV320AIC23 codec driver");
695 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
696 MODULE_LICENSE("GPL");
697 

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