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
41 #if 0
42 static void reg_dump(struct ak4114 *ak4114)
43 {
44 int i;
45
46 printk(KERN_DEBUG "AK4114 REG DUMP:\n");
47 for (i = 0; i < 0x20; i++)
48 printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4114, i), i < ARRAY_SIZE(ak4114->regmap) ? ak4114->regmap[i] : 0);
49 }
50 #endif
51
snd_ak4114_free(struct ak4114 * chip)52 static void snd_ak4114_free(struct ak4114 *chip)
53 {
54 atomic_inc(&chip->wq_processing); /* don't schedule new work */
55 cancel_delayed_work_sync(&chip->work);
56 kfree(chip);
57 }
58
snd_ak4114_dev_free(struct snd_device * device)59 static int snd_ak4114_dev_free(struct snd_device *device)
60 {
61 struct ak4114 *chip = device->device_data;
62 snd_ak4114_free(chip);
63 return 0;
64 }
65
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)66 int snd_ak4114_create(struct snd_card *card,
67 ak4114_read_t *read, ak4114_write_t *write,
68 const unsigned char pgm[6], const unsigned char txcsb[5],
69 void *private_data, struct ak4114 **r_ak4114)
70 {
71 struct ak4114 *chip;
72 int err = 0;
73 unsigned char reg;
74 static const struct snd_device_ops ops = {
75 .dev_free = snd_ak4114_dev_free,
76 };
77
78 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
79 if (chip == NULL)
80 return -ENOMEM;
81 spin_lock_init(&chip->lock);
82 chip->card = card;
83 chip->read = read;
84 chip->write = write;
85 chip->private_data = private_data;
86 INIT_DELAYED_WORK(&chip->work, ak4114_stats);
87 atomic_set(&chip->wq_processing, 0);
88 mutex_init(&chip->reinit_mutex);
89
90 for (reg = 0; reg < 6; reg++)
91 chip->regmap[reg] = pgm[reg];
92 for (reg = 0; reg < 5; reg++)
93 chip->txcsb[reg] = txcsb[reg];
94
95 ak4114_init_regs(chip);
96
97 chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT);
98 chip->rcs1 = reg_read(chip, AK4114_REG_RCS1);
99
100 if ((err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops)) < 0)
101 goto __fail;
102
103 if (r_ak4114)
104 *r_ak4114 = chip;
105 return 0;
106
107 __fail:
108 snd_ak4114_free(chip);
109 return err;
110 }
111 EXPORT_SYMBOL(snd_ak4114_create);
112
snd_ak4114_reg_write(struct ak4114 * chip,unsigned char reg,unsigned char mask,unsigned char val)113 void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val)
114 {
115 if (reg <= AK4114_REG_INT1_MASK)
116 reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
117 else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
118 reg_write(chip, reg,
119 (chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val);
120 }
121 EXPORT_SYMBOL(snd_ak4114_reg_write);
122
ak4114_init_regs(struct ak4114 * chip)123 static void ak4114_init_regs(struct ak4114 *chip)
124 {
125 unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
126
127 /* bring the chip to reset state and powerdown state */
128 reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN));
129 udelay(200);
130 /* release reset, but leave powerdown */
131 reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN);
132 udelay(200);
133 for (reg = 1; reg < 6; reg++)
134 reg_write(chip, reg, chip->regmap[reg]);
135 for (reg = 0; reg < 5; reg++)
136 reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]);
137 /* release powerdown, everything is initialized now */
138 reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN);
139 }
140
snd_ak4114_reinit(struct ak4114 * chip)141 void snd_ak4114_reinit(struct ak4114 *chip)
142 {
143 if (atomic_inc_return(&chip->wq_processing) == 1)
144 cancel_delayed_work_sync(&chip->work);
145 mutex_lock(&chip->reinit_mutex);
146 ak4114_init_regs(chip);
147 mutex_unlock(&chip->reinit_mutex);
148 /* bring up statistics / event queing */
149 if (atomic_dec_and_test(&chip->wq_processing))
150 schedule_delayed_work(&chip->work, HZ / 10);
151 }
152 EXPORT_SYMBOL(snd_ak4114_reinit);
153
external_rate(unsigned char rcs1)154 static unsigned int external_rate(unsigned char rcs1)
155 {
156 switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) {
157 case AK4114_FS_32000HZ: return 32000;
158 case AK4114_FS_44100HZ: return 44100;
159 case AK4114_FS_48000HZ: return 48000;
160 case AK4114_FS_88200HZ: return 88200;
161 case AK4114_FS_96000HZ: return 96000;
162 case AK4114_FS_176400HZ: return 176400;
163 case AK4114_FS_192000HZ: return 192000;
164 default: return 0;
165 }
166 }
167
snd_ak4114_in_error_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)168 static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol,
169 struct snd_ctl_elem_info *uinfo)
170 {
171 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
172 uinfo->count = 1;
173 uinfo->value.integer.min = 0;
174 uinfo->value.integer.max = LONG_MAX;
175 return 0;
176 }
177
snd_ak4114_in_error_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)178 static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol,
179 struct snd_ctl_elem_value *ucontrol)
180 {
181 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
182
183 spin_lock_irq(&chip->lock);
184 ucontrol->value.integer.value[0] =
185 chip->errors[kcontrol->private_value];
186 chip->errors[kcontrol->private_value] = 0;
187 spin_unlock_irq(&chip->lock);
188 return 0;
189 }
190
191 #define snd_ak4114_in_bit_info snd_ctl_boolean_mono_info
192
snd_ak4114_in_bit_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)193 static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,
194 struct snd_ctl_elem_value *ucontrol)
195 {
196 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
197 unsigned char reg = kcontrol->private_value & 0xff;
198 unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
199 unsigned char inv = (kcontrol->private_value >> 31) & 1;
200
201 ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
202 return 0;
203 }
204
snd_ak4114_rate_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)205 static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,
206 struct snd_ctl_elem_info *uinfo)
207 {
208 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
209 uinfo->count = 1;
210 uinfo->value.integer.min = 0;
211 uinfo->value.integer.max = 192000;
212 return 0;
213 }
214
snd_ak4114_rate_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)215 static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,
216 struct snd_ctl_elem_value *ucontrol)
217 {
218 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
219
220 ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));
221 return 0;
222 }
223
snd_ak4114_spdif_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)224 static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
225 {
226 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
227 uinfo->count = 1;
228 return 0;
229 }
230
snd_ak4114_spdif_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)231 static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol,
232 struct snd_ctl_elem_value *ucontrol)
233 {
234 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
235 unsigned i;
236
237 for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++)
238 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);
239 return 0;
240 }
241
snd_ak4114_spdif_playback_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)242 static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol,
243 struct snd_ctl_elem_value *ucontrol)
244 {
245 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
246 unsigned i;
247
248 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
249 ucontrol->value.iec958.status[i] = chip->txcsb[i];
250 return 0;
251 }
252
snd_ak4114_spdif_playback_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)253 static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol,
254 struct snd_ctl_elem_value *ucontrol)
255 {
256 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
257 unsigned i;
258
259 for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
260 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);
261 return 0;
262 }
263
snd_ak4114_spdif_mask_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)264 static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
265 {
266 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
267 uinfo->count = 1;
268 return 0;
269 }
270
snd_ak4114_spdif_mask_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)271 static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,
272 struct snd_ctl_elem_value *ucontrol)
273 {
274 memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);
275 return 0;
276 }
277
snd_ak4114_spdif_pinfo(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)278 static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
279 {
280 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
281 uinfo->value.integer.min = 0;
282 uinfo->value.integer.max = 0xffff;
283 uinfo->count = 4;
284 return 0;
285 }
286
snd_ak4114_spdif_pget(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)287 static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,
288 struct snd_ctl_elem_value *ucontrol)
289 {
290 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
291 unsigned short tmp;
292
293 ucontrol->value.integer.value[0] = 0xf8f2;
294 ucontrol->value.integer.value[1] = 0x4e1f;
295 tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);
296 ucontrol->value.integer.value[2] = tmp;
297 tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);
298 ucontrol->value.integer.value[3] = tmp;
299 return 0;
300 }
301
snd_ak4114_spdif_qinfo(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)302 static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
303 {
304 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
305 uinfo->count = AK4114_REG_QSUB_SIZE;
306 return 0;
307 }
308
snd_ak4114_spdif_qget(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)309 static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
310 struct snd_ctl_elem_value *ucontrol)
311 {
312 struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
313 unsigned i;
314
315 for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)
316 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);
317 return 0;
318 }
319
320 /* Don't forget to change AK4114_CONTROLS define!!! */
321 static const struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
322 {
323 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
324 .name = "IEC958 Parity Errors",
325 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
326 .info = snd_ak4114_in_error_info,
327 .get = snd_ak4114_in_error_get,
328 .private_value = AK4114_PARITY_ERRORS,
329 },
330 {
331 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
332 .name = "IEC958 V-Bit Errors",
333 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
334 .info = snd_ak4114_in_error_info,
335 .get = snd_ak4114_in_error_get,
336 .private_value = AK4114_V_BIT_ERRORS,
337 },
338 {
339 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
340 .name = "IEC958 C-CRC Errors",
341 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
342 .info = snd_ak4114_in_error_info,
343 .get = snd_ak4114_in_error_get,
344 .private_value = AK4114_CCRC_ERRORS,
345 },
346 {
347 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
348 .name = "IEC958 Q-CRC Errors",
349 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
350 .info = snd_ak4114_in_error_info,
351 .get = snd_ak4114_in_error_get,
352 .private_value = AK4114_QCRC_ERRORS,
353 },
354 {
355 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
356 .name = "IEC958 External Rate",
357 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
358 .info = snd_ak4114_rate_info,
359 .get = snd_ak4114_rate_get,
360 },
361 {
362 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
363 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
364 .access = SNDRV_CTL_ELEM_ACCESS_READ,
365 .info = snd_ak4114_spdif_mask_info,
366 .get = snd_ak4114_spdif_mask_get,
367 },
368 {
369 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
370 .name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
371 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
372 .info = snd_ak4114_spdif_info,
373 .get = snd_ak4114_spdif_playback_get,
374 .put = snd_ak4114_spdif_playback_put,
375 },
376 {
377 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
378 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
379 .access = SNDRV_CTL_ELEM_ACCESS_READ,
380 .info = snd_ak4114_spdif_mask_info,
381 .get = snd_ak4114_spdif_mask_get,
382 },
383 {
384 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
385 .name = SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
386 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
387 .info = snd_ak4114_spdif_info,
388 .get = snd_ak4114_spdif_get,
389 },
390 {
391 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
392 .name = "IEC958 Preamble Capture Default",
393 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
394 .info = snd_ak4114_spdif_pinfo,
395 .get = snd_ak4114_spdif_pget,
396 },
397 {
398 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
399 .name = "IEC958 Q-subcode Capture Default",
400 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
401 .info = snd_ak4114_spdif_qinfo,
402 .get = snd_ak4114_spdif_qget,
403 },
404 {
405 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
406 .name = "IEC958 Audio",
407 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
408 .info = snd_ak4114_in_bit_info,
409 .get = snd_ak4114_in_bit_get,
410 .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,
411 },
412 {
413 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
414 .name = "IEC958 Non-PCM Bitstream",
415 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
416 .info = snd_ak4114_in_bit_info,
417 .get = snd_ak4114_in_bit_get,
418 .private_value = (6<<8) | AK4114_REG_RCS0,
419 },
420 {
421 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
422 .name = "IEC958 DTS Bitstream",
423 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
424 .info = snd_ak4114_in_bit_info,
425 .get = snd_ak4114_in_bit_get,
426 .private_value = (3<<8) | AK4114_REG_RCS0,
427 },
428 {
429 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
430 .name = "IEC958 PPL Lock Status",
431 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
432 .info = snd_ak4114_in_bit_info,
433 .get = snd_ak4114_in_bit_get,
434 .private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0,
435 }
436 };
437
438
snd_ak4114_proc_regs_read(struct snd_info_entry * entry,struct snd_info_buffer * buffer)439 static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry,
440 struct snd_info_buffer *buffer)
441 {
442 struct ak4114 *ak4114 = entry->private_data;
443 int reg, val;
444 /* all ak4114 registers 0x00 - 0x1f */
445 for (reg = 0; reg < 0x20; reg++) {
446 val = reg_read(ak4114, reg);
447 snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val);
448 }
449 }
450
snd_ak4114_proc_init(struct ak4114 * ak4114)451 static void snd_ak4114_proc_init(struct ak4114 *ak4114)
452 {
453 snd_card_ro_proc_new(ak4114->card, "ak4114", ak4114,
454 snd_ak4114_proc_regs_read);
455 }
456
snd_ak4114_build(struct ak4114 * ak4114,struct snd_pcm_substream * ply_substream,struct snd_pcm_substream * cap_substream)457 int snd_ak4114_build(struct ak4114 *ak4114,
458 struct snd_pcm_substream *ply_substream,
459 struct snd_pcm_substream *cap_substream)
460 {
461 struct snd_kcontrol *kctl;
462 unsigned int idx;
463 int err;
464
465 if (snd_BUG_ON(!cap_substream))
466 return -EINVAL;
467 ak4114->playback_substream = ply_substream;
468 ak4114->capture_substream = cap_substream;
469 for (idx = 0; idx < AK4114_CONTROLS; idx++) {
470 kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114);
471 if (kctl == NULL)
472 return -ENOMEM;
473 if (strstr(kctl->id.name, "Playback")) {
474 if (ply_substream == NULL) {
475 snd_ctl_free_one(kctl);
476 ak4114->kctls[idx] = NULL;
477 continue;
478 }
479 kctl->id.device = ply_substream->pcm->device;
480 kctl->id.subdevice = ply_substream->number;
481 } else {
482 kctl->id.device = cap_substream->pcm->device;
483 kctl->id.subdevice = cap_substream->number;
484 }
485 err = snd_ctl_add(ak4114->card, kctl);
486 if (err < 0)
487 return err;
488 ak4114->kctls[idx] = kctl;
489 }
490 snd_ak4114_proc_init(ak4114);
491 /* trigger workq */
492 schedule_delayed_work(&ak4114->work, HZ / 10);
493 return 0;
494 }
495 EXPORT_SYMBOL(snd_ak4114_build);
496
497 /* notify kcontrols if any parameters are changed */
ak4114_notify(struct ak4114 * ak4114,unsigned char rcs0,unsigned char rcs1,unsigned char c0,unsigned char c1)498 static void ak4114_notify(struct ak4114 *ak4114,
499 unsigned char rcs0, unsigned char rcs1,
500 unsigned char c0, unsigned char c1)
501 {
502 if (!ak4114->kctls[0])
503 return;
504
505 if (rcs0 & AK4114_PAR)
506 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
507 &ak4114->kctls[0]->id);
508 if (rcs0 & AK4114_V)
509 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
510 &ak4114->kctls[1]->id);
511 if (rcs1 & AK4114_CCRC)
512 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
513 &ak4114->kctls[2]->id);
514 if (rcs1 & AK4114_QCRC)
515 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
516 &ak4114->kctls[3]->id);
517
518 /* rate change */
519 if (c1 & 0xf0)
520 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
521 &ak4114->kctls[4]->id);
522
523 if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
524 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
525 &ak4114->kctls[9]->id);
526 if (c0 & AK4114_QINT)
527 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
528 &ak4114->kctls[10]->id);
529
530 if (c0 & AK4114_AUDION)
531 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
532 &ak4114->kctls[11]->id);
533 if (c0 & AK4114_AUTO)
534 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
535 &ak4114->kctls[12]->id);
536 if (c0 & AK4114_DTSCD)
537 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
538 &ak4114->kctls[13]->id);
539 if (c0 & AK4114_UNLCK)
540 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
541 &ak4114->kctls[14]->id);
542 }
543
snd_ak4114_external_rate(struct ak4114 * ak4114)544 int snd_ak4114_external_rate(struct ak4114 *ak4114)
545 {
546 unsigned char rcs1;
547
548 rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
549 return external_rate(rcs1);
550 }
551 EXPORT_SYMBOL(snd_ak4114_external_rate);
552
snd_ak4114_check_rate_and_errors(struct ak4114 * ak4114,unsigned int flags)553 int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
554 {
555 struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
556 unsigned long _flags;
557 int res = 0;
558 unsigned char rcs0, rcs1;
559 unsigned char c0, c1;
560
561 rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
562 if (flags & AK4114_CHECK_NO_STAT)
563 goto __rate;
564 rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
565 spin_lock_irqsave(&ak4114->lock, _flags);
566 if (rcs0 & AK4114_PAR)
567 ak4114->errors[AK4114_PARITY_ERRORS]++;
568 if (rcs1 & AK4114_V)
569 ak4114->errors[AK4114_V_BIT_ERRORS]++;
570 if (rcs1 & AK4114_CCRC)
571 ak4114->errors[AK4114_CCRC_ERRORS]++;
572 if (rcs1 & AK4114_QCRC)
573 ak4114->errors[AK4114_QCRC_ERRORS]++;
574 c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
575 (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
576 c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
577 ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
578 ak4114->rcs1 = rcs1;
579 spin_unlock_irqrestore(&ak4114->lock, _flags);
580
581 ak4114_notify(ak4114, rcs0, rcs1, c0, c1);
582 if (ak4114->change_callback && (c0 | c1) != 0)
583 ak4114->change_callback(ak4114, c0, c1);
584
585 __rate:
586 /* compare rate */
587 res = external_rate(rcs1);
588 if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
589 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
590 if (snd_pcm_running(ak4114->capture_substream)) {
591 // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
592 snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
593 res = 1;
594 }
595 snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);
596 }
597 return res;
598 }
599 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);
600
ak4114_stats(struct work_struct * work)601 static void ak4114_stats(struct work_struct *work)
602 {
603 struct ak4114 *chip = container_of(work, struct ak4114, work.work);
604
605 if (atomic_inc_return(&chip->wq_processing) == 1)
606 snd_ak4114_check_rate_and_errors(chip, chip->check_flags);
607 if (atomic_dec_and_test(&chip->wq_processing))
608 schedule_delayed_work(&chip->work, HZ / 10);
609 }
610
611 #ifdef CONFIG_PM
snd_ak4114_suspend(struct ak4114 * chip)612 void snd_ak4114_suspend(struct ak4114 *chip)
613 {
614 atomic_inc(&chip->wq_processing); /* don't schedule new work */
615 cancel_delayed_work_sync(&chip->work);
616 }
617 EXPORT_SYMBOL(snd_ak4114_suspend);
618
snd_ak4114_resume(struct ak4114 * chip)619 void snd_ak4114_resume(struct ak4114 *chip)
620 {
621 atomic_dec(&chip->wq_processing);
622 snd_ak4114_reinit(chip);
623 }
624 EXPORT_SYMBOL(snd_ak4114_resume);
625 #endif
626