1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Routines for control of the AK4114 via I2C and 4-wire serial interface
4 * IEC958 (S/PDIF) receiver by Asahi Kasei
5 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
6 */
7
8 #include <linux/slab.h>
9 #include <linux/delay.h>
10 #include <linux/module.h>
11 #include <sound/core.h>
12 #include <sound/control.h>
13 #include <sound/pcm.h>
14 #include <sound/ak4114.h>
15 #include <sound/asoundef.h>
16 #include <sound/info.h>
17
18 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
19 MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei");
20 MODULE_LICENSE("GPL");
21
22 #define AK4114_ADDR 0x00 /* fixed address */
23
24 static void ak4114_stats(struct work_struct *work);
25 static void ak4114_init_regs(struct ak4114 *chip);
26
reg_write(struct ak4114 * ak4114,unsigned char reg,unsigned char val)27 static void reg_write(struct ak4114 *ak4114, unsigned char reg, unsigned char val)
28 {
29 ak4114->write(ak4114->private_data, reg, val);
30 if (reg <= AK4114_REG_INT1_MASK)
31 ak4114->regmap[reg] = val;
32 else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
33 ak4114->txcsb[reg-AK4114_REG_TXCSB0] = val;
34 }
35
reg_read(struct ak4114 * ak4114,unsigned char reg)36 static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg)
37 {
38 return ak4114->read(ak4114->private_data, reg);
39 }
40
snd_ak4114_free(struct ak4114 * chip)41 static void snd_ak4114_free(struct ak4114 *chip)
42 {
43 atomic_inc(&chip->wq_processing); /* don't schedule new work */
44 cancel_delayed_work_sync(&chip->work);
45 kfree(chip);
46 }
47
snd_ak4114_dev_free(struct snd_device * device)48 static int snd_ak4114_dev_free(struct snd_device *device)
49 {
50 struct ak4114 *chip = device->device_data;
51 snd_ak4114_free(chip);
52 return 0;
53 }
54
snd_ak4114_create(struct snd_card * card,ak4114_read_t * read,ak4114_write_t * write,const unsigned char pgm[6],const unsigned char txcsb[5],void * private_data,struct ak4114 ** r_ak4114)55 int snd_ak4114_create(struct snd_card *card,
56 ak4114_read_t *read, ak4114_write_t *write,
57 const unsigned char pgm[6], const unsigned char txcsb[5],
58 void *private_data, struct ak4114 **r_ak4114)
59 {
60 struct ak4114 *chip;
61 int err = 0;
62 unsigned char reg;
63 static const struct snd_device_ops ops = {
64 .dev_free = snd_ak4114_dev_free,
65 };
66
67 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
68 if (chip == NULL)
69 return -ENOMEM;
70 spin_lock_init(&chip->lock);
71 chip->card = card;
72 chip->read = read;
73 chip->write = write;
74 chip->private_data = private_data;
75 INIT_DELAYED_WORK(&chip->work, ak4114_stats);
76 atomic_set(&chip->wq_processing, 0);
77 mutex_init(&chip->reinit_mutex);
78
79 for (reg = 0; reg < 6; reg++)
80 chip->regmap[reg] = pgm[reg];
81 for (reg = 0; reg < 5; reg++)
82 chip->txcsb[reg] = txcsb[reg];
83
84 ak4114_init_regs(chip);
85
86 chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT);
87 chip->rcs1 = reg_read(chip, AK4114_REG_RCS1);
88
89 err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops);
90 if (err < 0)
91 goto __fail;
92
93 if (r_ak4114)
94 *r_ak4114 = chip;
95 return 0;
96
97 __fail:
98 snd_ak4114_free(chip);
99 return err;
100 }
101 EXPORT_SYMBOL(snd_ak4114_create);
102
snd_ak4114_reg_write(struct ak4114 * chip,unsigned char reg,unsigned char mask,unsigned char val)103 void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val)
104 {
105 if (reg <= AK4114_REG_INT1_MASK)
106 reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
107 else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
108 reg_write(chip, reg,
109 (chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val);
110 }
111 EXPORT_SYMBOL(snd_ak4114_reg_write);
112
ak4114_init_regs(struct ak4114 * chip)113 static void ak4114_init_regs(struct ak4114 *chip)
114 {
115 unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
116
117 /* bring the chip to reset state and powerdown state */
118 reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN));
119 udelay(200);
120 /* release reset, but leave powerdown */
121 reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN);
122 udelay(200);
123 for (reg = 1; reg < 6; reg++)
124 reg_write(chip, reg, chip->regmap[reg]);
125 for (reg = 0; reg < 5; reg++)
126 reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]);
127 /* release powerdown, everything is initialized now */
128 reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN);
129 }
130
snd_ak4114_reinit(struct ak4114 * chip)131 void snd_ak4114_reinit(struct ak4114 *chip)
132 {
133 if (atomic_inc_return(&chip->wq_processing) == 1)
134 cancel_delayed_work_sync(&chip->work);
135 mutex_lock(&chip->reinit_mutex);
136 ak4114_init_regs(chip);
137 mutex_unlock(&chip->reinit_mutex);
138 /* bring up statistics / event queing */
139 if (atomic_dec_and_test(&chip->wq_processing))
140 schedule_delayed_work(&chip->work, HZ / 10);
141 }
142 EXPORT_SYMBOL(snd_ak4114_reinit);
143
external_rate(unsigned char rcs1)144 static unsigned int external_rate(unsigned char rcs1)
145 {
146 switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) {
147 case AK4114_FS_32000HZ: return 32000;
148 case AK4114_FS_44100HZ: return 44100;
149 case AK4114_FS_48000HZ: return 48000;
150 case AK4114_FS_88200HZ: return 88200;
151 case AK4114_FS_96000HZ: return 96000;
152 case AK4114_FS_176400HZ: return 176400;
153 case AK4114_FS_192000HZ: return 192000;
154 default: return 0;
155 }
156 }
157
snd_ak4114_in_error_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)158 static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol,
159 struct snd_ctl_elem_info *uinfo)
160 {
161 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
162 uinfo->count = 1;
163 uinfo->value.integer.min = 0;
164 uinfo->value.integer.max = LONG_MAX;
165 return 0;
166 }
167
snd_ak4114_in_error_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)168 static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol,
169 struct snd_ctl_elem_value *ucontrol)
170 {
171 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
172
173 spin_lock_irq(&chip->lock);
174 ucontrol->value.integer.value[0] =
175 chip->errors[kcontrol->private_value];
176 chip->errors[kcontrol->private_value] = 0;
177 spin_unlock_irq(&chip->lock);
178 return 0;
179 }
180
181 #define snd_ak4114_in_bit_info snd_ctl_boolean_mono_info
182
snd_ak4114_in_bit_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)183 static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,
184 struct snd_ctl_elem_value *ucontrol)
185 {
186 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
187 unsigned char reg = kcontrol->private_value & 0xff;
188 unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
189 unsigned char inv = (kcontrol->private_value >> 31) & 1;
190
191 ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
192 return 0;
193 }
194
snd_ak4114_rate_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)195 static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,
196 struct snd_ctl_elem_info *uinfo)
197 {
198 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
199 uinfo->count = 1;
200 uinfo->value.integer.min = 0;
201 uinfo->value.integer.max = 192000;
202 return 0;
203 }
204
snd_ak4114_rate_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)205 static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,
206 struct snd_ctl_elem_value *ucontrol)
207 {
208 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
209
210 ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));
211 return 0;
212 }
213
snd_ak4114_spdif_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)214 static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
215 {
216 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
217 uinfo->count = 1;
218 return 0;
219 }
220
snd_ak4114_spdif_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)221 static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol,
222 struct snd_ctl_elem_value *ucontrol)
223 {
224 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
225 unsigned i;
226
227 for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++)
228 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);
229 return 0;
230 }
231
snd_ak4114_spdif_playback_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)232 static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol,
233 struct snd_ctl_elem_value *ucontrol)
234 {
235 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
236 unsigned i;
237
238 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
239 ucontrol->value.iec958.status[i] = chip->txcsb[i];
240 return 0;
241 }
242
snd_ak4114_spdif_playback_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)243 static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol,
244 struct snd_ctl_elem_value *ucontrol)
245 {
246 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
247 unsigned i;
248
249 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
250 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);
251 return 0;
252 }
253
snd_ak4114_spdif_mask_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)254 static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
255 {
256 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
257 uinfo->count = 1;
258 return 0;
259 }
260
snd_ak4114_spdif_mask_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)261 static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,
262 struct snd_ctl_elem_value *ucontrol)
263 {
264 memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);
265 return 0;
266 }
267
snd_ak4114_spdif_pinfo(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)268 static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
269 {
270 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
271 uinfo->value.integer.min = 0;
272 uinfo->value.integer.max = 0xffff;
273 uinfo->count = 4;
274 return 0;
275 }
276
snd_ak4114_spdif_pget(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)277 static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,
278 struct snd_ctl_elem_value *ucontrol)
279 {
280 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
281 unsigned short tmp;
282
283 ucontrol->value.integer.value[0] = 0xf8f2;
284 ucontrol->value.integer.value[1] = 0x4e1f;
285 tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);
286 ucontrol->value.integer.value[2] = tmp;
287 tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);
288 ucontrol->value.integer.value[3] = tmp;
289 return 0;
290 }
291
snd_ak4114_spdif_qinfo(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)292 static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
293 {
294 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
295 uinfo->count = AK4114_REG_QSUB_SIZE;
296 return 0;
297 }
298
snd_ak4114_spdif_qget(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)299 static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
300 struct snd_ctl_elem_value *ucontrol)
301 {
302 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
303 unsigned i;
304
305 for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)
306 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);
307 return 0;
308 }
309
310 /* Don't forget to change AK4114_CONTROLS define!!! */
311 static const struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
312 {
313 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
314 .name = "IEC958 Parity Errors",
315 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
316 .info = snd_ak4114_in_error_info,
317 .get = snd_ak4114_in_error_get,
318 .private_value = AK4114_PARITY_ERRORS,
319 },
320 {
321 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
322 .name = "IEC958 V-Bit Errors",
323 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
324 .info = snd_ak4114_in_error_info,
325 .get = snd_ak4114_in_error_get,
326 .private_value = AK4114_V_BIT_ERRORS,
327 },
328 {
329 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
330 .name = "IEC958 C-CRC Errors",
331 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
332 .info = snd_ak4114_in_error_info,
333 .get = snd_ak4114_in_error_get,
334 .private_value = AK4114_CCRC_ERRORS,
335 },
336 {
337 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
338 .name = "IEC958 Q-CRC Errors",
339 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
340 .info = snd_ak4114_in_error_info,
341 .get = snd_ak4114_in_error_get,
342 .private_value = AK4114_QCRC_ERRORS,
343 },
344 {
345 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
346 .name = "IEC958 External Rate",
347 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
348 .info = snd_ak4114_rate_info,
349 .get = snd_ak4114_rate_get,
350 },
351 {
352 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
353 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
354 .access = SNDRV_CTL_ELEM_ACCESS_READ,
355 .info = snd_ak4114_spdif_mask_info,
356 .get = snd_ak4114_spdif_mask_get,
357 },
358 {
359 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
360 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
361 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
362 .info = snd_ak4114_spdif_info,
363 .get = snd_ak4114_spdif_playback_get,
364 .put = snd_ak4114_spdif_playback_put,
365 },
366 {
367 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
368 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
369 .access = SNDRV_CTL_ELEM_ACCESS_READ,
370 .info = snd_ak4114_spdif_mask_info,
371 .get = snd_ak4114_spdif_mask_get,
372 },
373 {
374 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
375 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
376 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
377 .info = snd_ak4114_spdif_info,
378 .get = snd_ak4114_spdif_get,
379 },
380 {
381 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
382 .name = "IEC958 Preamble Capture Default",
383 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
384 .info = snd_ak4114_spdif_pinfo,
385 .get = snd_ak4114_spdif_pget,
386 },
387 {
388 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
389 .name = "IEC958 Q-subcode Capture Default",
390 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
391 .info = snd_ak4114_spdif_qinfo,
392 .get = snd_ak4114_spdif_qget,
393 },
394 {
395 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
396 .name = "IEC958 Audio",
397 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
398 .info = snd_ak4114_in_bit_info,
399 .get = snd_ak4114_in_bit_get,
400 .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,
401 },
402 {
403 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
404 .name = "IEC958 Non-PCM Bitstream",
405 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
406 .info = snd_ak4114_in_bit_info,
407 .get = snd_ak4114_in_bit_get,
408 .private_value = (6<<8) | AK4114_REG_RCS0,
409 },
410 {
411 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
412 .name = "IEC958 DTS Bitstream",
413 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
414 .info = snd_ak4114_in_bit_info,
415 .get = snd_ak4114_in_bit_get,
416 .private_value = (3<<8) | AK4114_REG_RCS0,
417 },
418 {
419 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
420 .name = "IEC958 PPL Lock Status",
421 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
422 .info = snd_ak4114_in_bit_info,
423 .get = snd_ak4114_in_bit_get,
424 .private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0,
425 }
426 };
427
428
snd_ak4114_proc_regs_read(struct snd_info_entry * entry,struct snd_info_buffer * buffer)429 static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry,
430 struct snd_info_buffer *buffer)
431 {
432 struct ak4114 *ak4114 = entry->private_data;
433 int reg, val;
434 /* all ak4114 registers 0x00 - 0x1f */
435 for (reg = 0; reg < 0x20; reg++) {
436 val = reg_read(ak4114, reg);
437 snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val);
438 }
439 }
440
snd_ak4114_proc_init(struct ak4114 * ak4114)441 static void snd_ak4114_proc_init(struct ak4114 *ak4114)
442 {
443 snd_card_ro_proc_new(ak4114->card, "ak4114", ak4114,
444 snd_ak4114_proc_regs_read);
445 }
446
snd_ak4114_build(struct ak4114 * ak4114,struct snd_pcm_substream * ply_substream,struct snd_pcm_substream * cap_substream)447 int snd_ak4114_build(struct ak4114 *ak4114,
448 struct snd_pcm_substream *ply_substream,
449 struct snd_pcm_substream *cap_substream)
450 {
451 struct snd_kcontrol *kctl;
452 unsigned int idx;
453 int err;
454
455 if (snd_BUG_ON(!cap_substream))
456 return -EINVAL;
457 ak4114->playback_substream = ply_substream;
458 ak4114->capture_substream = cap_substream;
459 for (idx = 0; idx < AK4114_CONTROLS; idx++) {
460 kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114);
461 if (kctl == NULL)
462 return -ENOMEM;
463 if (strstr(kctl->id.name, "Playback")) {
464 if (ply_substream == NULL) {
465 snd_ctl_free_one(kctl);
466 ak4114->kctls[idx] = NULL;
467 continue;
468 }
469 kctl->id.device = ply_substream->pcm->device;
470 kctl->id.subdevice = ply_substream->number;
471 } else {
472 kctl->id.device = cap_substream->pcm->device;
473 kctl->id.subdevice = cap_substream->number;
474 }
475 err = snd_ctl_add(ak4114->card, kctl);
476 if (err < 0)
477 return err;
478 ak4114->kctls[idx] = kctl;
479 }
480 snd_ak4114_proc_init(ak4114);
481 /* trigger workq */
482 schedule_delayed_work(&ak4114->work, HZ / 10);
483 return 0;
484 }
485 EXPORT_SYMBOL(snd_ak4114_build);
486
487 /* notify kcontrols if any parameters are changed */
ak4114_notify(struct ak4114 * ak4114,unsigned char rcs0,unsigned char rcs1,unsigned char c0,unsigned char c1)488 static void ak4114_notify(struct ak4114 *ak4114,
489 unsigned char rcs0, unsigned char rcs1,
490 unsigned char c0, unsigned char c1)
491 {
492 if (!ak4114->kctls[0])
493 return;
494
495 if (rcs0 & AK4114_PAR)
496 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
497 &ak4114->kctls[0]->id);
498 if (rcs0 & AK4114_V)
499 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
500 &ak4114->kctls[1]->id);
501 if (rcs1 & AK4114_CCRC)
502 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
503 &ak4114->kctls[2]->id);
504 if (rcs1 & AK4114_QCRC)
505 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
506 &ak4114->kctls[3]->id);
507
508 /* rate change */
509 if (c1 & 0xf0)
510 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
511 &ak4114->kctls[4]->id);
512
513 if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
514 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
515 &ak4114->kctls[9]->id);
516 if (c0 & AK4114_QINT)
517 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
518 &ak4114->kctls[10]->id);
519
520 if (c0 & AK4114_AUDION)
521 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
522 &ak4114->kctls[11]->id);
523 if (c0 & AK4114_AUTO)
524 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
525 &ak4114->kctls[12]->id);
526 if (c0 & AK4114_DTSCD)
527 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
528 &ak4114->kctls[13]->id);
529 if (c0 & AK4114_UNLCK)
530 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
531 &ak4114->kctls[14]->id);
532 }
533
snd_ak4114_external_rate(struct ak4114 * ak4114)534 int snd_ak4114_external_rate(struct ak4114 *ak4114)
535 {
536 unsigned char rcs1;
537
538 rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
539 return external_rate(rcs1);
540 }
541 EXPORT_SYMBOL(snd_ak4114_external_rate);
542
snd_ak4114_check_rate_and_errors(struct ak4114 * ak4114,unsigned int flags)543 int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
544 {
545 struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
546 unsigned long _flags;
547 int res = 0;
548 unsigned char rcs0, rcs1;
549 unsigned char c0, c1;
550
551 rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
552 if (flags & AK4114_CHECK_NO_STAT)
553 goto __rate;
554 rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
555 spin_lock_irqsave(&ak4114->lock, _flags);
556 if (rcs0 & AK4114_PAR)
557 ak4114->errors[AK4114_PARITY_ERRORS]++;
558 if (rcs1 & AK4114_V)
559 ak4114->errors[AK4114_V_BIT_ERRORS]++;
560 if (rcs1 & AK4114_CCRC)
561 ak4114->errors[AK4114_CCRC_ERRORS]++;
562 if (rcs1 & AK4114_QCRC)
563 ak4114->errors[AK4114_QCRC_ERRORS]++;
564 c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
565 (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
566 c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
567 ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
568 ak4114->rcs1 = rcs1;
569 spin_unlock_irqrestore(&ak4114->lock, _flags);
570
571 ak4114_notify(ak4114, rcs0, rcs1, c0, c1);
572 if (ak4114->change_callback && (c0 | c1) != 0)
573 ak4114->change_callback(ak4114, c0, c1);
574
575 __rate:
576 /* compare rate */
577 res = external_rate(rcs1);
578 if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
579 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
580 if (snd_pcm_running(ak4114->capture_substream)) {
581 snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
582 res = 1;
583 }
584 snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);
585 }
586 return res;
587 }
588 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);
589
ak4114_stats(struct work_struct * work)590 static void ak4114_stats(struct work_struct *work)
591 {
592 struct ak4114 *chip = container_of(work, struct ak4114, work.work);
593
594 if (atomic_inc_return(&chip->wq_processing) == 1)
595 snd_ak4114_check_rate_and_errors(chip, chip->check_flags);
596 if (atomic_dec_and_test(&chip->wq_processing))
597 schedule_delayed_work(&chip->work, HZ / 10);
598 }
599
600 #ifdef CONFIG_PM
snd_ak4114_suspend(struct ak4114 * chip)601 void snd_ak4114_suspend(struct ak4114 *chip)
602 {
603 atomic_inc(&chip->wq_processing); /* don't schedule new work */
604 cancel_delayed_work_sync(&chip->work);
605 }
606 EXPORT_SYMBOL(snd_ak4114_suspend);
607
snd_ak4114_resume(struct ak4114 * chip)608 void snd_ak4114_resume(struct ak4114 *chip)
609 {
610 atomic_dec(&chip->wq_processing);
611 snd_ak4114_reinit(chip);
612 }
613 EXPORT_SYMBOL(snd_ak4114_resume);
614 #endif
615