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 	err = snd_device_new(card, SNDRV_DEV_CODEC, chip, &ops);
101 	if (err < 0)
102 		goto __fail;
103 
104 	if (r_ak4114)
105 		*r_ak4114 = chip;
106 	return 0;
107 
108       __fail:
109 	snd_ak4114_free(chip);
110 	return err;
111 }
112 EXPORT_SYMBOL(snd_ak4114_create);
113 
snd_ak4114_reg_write(struct ak4114 * chip,unsigned char reg,unsigned char mask,unsigned char val)114 void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val)
115 {
116 	if (reg <= AK4114_REG_INT1_MASK)
117 		reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
118 	else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
119 		reg_write(chip, reg,
120 			  (chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val);
121 }
122 EXPORT_SYMBOL(snd_ak4114_reg_write);
123 
ak4114_init_regs(struct ak4114 * chip)124 static void ak4114_init_regs(struct ak4114 *chip)
125 {
126 	unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
127 
128 	/* bring the chip to reset state and powerdown state */
129 	reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN));
130 	udelay(200);
131 	/* release reset, but leave powerdown */
132 	reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN);
133 	udelay(200);
134 	for (reg = 1; reg < 6; reg++)
135 		reg_write(chip, reg, chip->regmap[reg]);
136 	for (reg = 0; reg < 5; reg++)
137 		reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]);
138 	/* release powerdown, everything is initialized now */
139 	reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN);
140 }
141 
snd_ak4114_reinit(struct ak4114 * chip)142 void snd_ak4114_reinit(struct ak4114 *chip)
143 {
144 	if (atomic_inc_return(&chip->wq_processing) == 1)
145 		cancel_delayed_work_sync(&chip->work);
146 	mutex_lock(&chip->reinit_mutex);
147 	ak4114_init_regs(chip);
148 	mutex_unlock(&chip->reinit_mutex);
149 	/* bring up statistics / event queing */
150 	if (atomic_dec_and_test(&chip->wq_processing))
151 		schedule_delayed_work(&chip->work, HZ / 10);
152 }
153 EXPORT_SYMBOL(snd_ak4114_reinit);
154 
external_rate(unsigned char rcs1)155 static unsigned int external_rate(unsigned char rcs1)
156 {
157 	switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) {
158 	case AK4114_FS_32000HZ: return 32000;
159 	case AK4114_FS_44100HZ: return 44100;
160 	case AK4114_FS_48000HZ: return 48000;
161 	case AK4114_FS_88200HZ: return 88200;
162 	case AK4114_FS_96000HZ: return 96000;
163 	case AK4114_FS_176400HZ: return 176400;
164 	case AK4114_FS_192000HZ: return 192000;
165 	default:		return 0;
166 	}
167 }
168 
snd_ak4114_in_error_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)169 static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol,
170 				    struct snd_ctl_elem_info *uinfo)
171 {
172 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
173 	uinfo->count = 1;
174 	uinfo->value.integer.min = 0;
175 	uinfo->value.integer.max = LONG_MAX;
176 	return 0;
177 }
178 
snd_ak4114_in_error_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)179 static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol,
180 				   struct snd_ctl_elem_value *ucontrol)
181 {
182 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
183 
184 	spin_lock_irq(&chip->lock);
185 	ucontrol->value.integer.value[0] =
186 		chip->errors[kcontrol->private_value];
187 	chip->errors[kcontrol->private_value] = 0;
188 	spin_unlock_irq(&chip->lock);
189 	return 0;
190 }
191 
192 #define snd_ak4114_in_bit_info		snd_ctl_boolean_mono_info
193 
snd_ak4114_in_bit_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)194 static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,
195 				 struct snd_ctl_elem_value *ucontrol)
196 {
197 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
198 	unsigned char reg = kcontrol->private_value & 0xff;
199 	unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
200 	unsigned char inv = (kcontrol->private_value >> 31) & 1;
201 
202 	ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
203 	return 0;
204 }
205 
snd_ak4114_rate_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)206 static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,
207 				struct snd_ctl_elem_info *uinfo)
208 {
209 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
210 	uinfo->count = 1;
211 	uinfo->value.integer.min = 0;
212 	uinfo->value.integer.max = 192000;
213 	return 0;
214 }
215 
snd_ak4114_rate_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)216 static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,
217 			       struct snd_ctl_elem_value *ucontrol)
218 {
219 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
220 
221 	ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));
222 	return 0;
223 }
224 
snd_ak4114_spdif_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)225 static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
226 {
227 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
228 	uinfo->count = 1;
229 	return 0;
230 }
231 
snd_ak4114_spdif_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)232 static int snd_ak4114_spdif_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_RXCSB_SIZE; i++)
239 		ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);
240 	return 0;
241 }
242 
snd_ak4114_spdif_playback_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)243 static int snd_ak4114_spdif_playback_get(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 		ucontrol->value.iec958.status[i] = chip->txcsb[i];
251 	return 0;
252 }
253 
snd_ak4114_spdif_playback_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)254 static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol,
255 					 struct snd_ctl_elem_value *ucontrol)
256 {
257 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
258 	unsigned i;
259 
260 	for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
261 		reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);
262 	return 0;
263 }
264 
snd_ak4114_spdif_mask_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)265 static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
266 {
267 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
268 	uinfo->count = 1;
269 	return 0;
270 }
271 
snd_ak4114_spdif_mask_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)272 static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,
273 				      struct snd_ctl_elem_value *ucontrol)
274 {
275 	memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);
276 	return 0;
277 }
278 
snd_ak4114_spdif_pinfo(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)279 static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
280 {
281 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
282 	uinfo->value.integer.min = 0;
283 	uinfo->value.integer.max = 0xffff;
284 	uinfo->count = 4;
285 	return 0;
286 }
287 
snd_ak4114_spdif_pget(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)288 static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,
289 				 struct snd_ctl_elem_value *ucontrol)
290 {
291 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
292 	unsigned short tmp;
293 
294 	ucontrol->value.integer.value[0] = 0xf8f2;
295 	ucontrol->value.integer.value[1] = 0x4e1f;
296 	tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);
297 	ucontrol->value.integer.value[2] = tmp;
298 	tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);
299 	ucontrol->value.integer.value[3] = tmp;
300 	return 0;
301 }
302 
snd_ak4114_spdif_qinfo(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)303 static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
304 {
305 	uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
306 	uinfo->count = AK4114_REG_QSUB_SIZE;
307 	return 0;
308 }
309 
snd_ak4114_spdif_qget(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)310 static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
311 				 struct snd_ctl_elem_value *ucontrol)
312 {
313 	struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
314 	unsigned i;
315 
316 	for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)
317 		ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);
318 	return 0;
319 }
320 
321 /* Don't forget to change AK4114_CONTROLS define!!! */
322 static const struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
323 {
324 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
325 	.name =		"IEC958 Parity Errors",
326 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
327 	.info =		snd_ak4114_in_error_info,
328 	.get =		snd_ak4114_in_error_get,
329 	.private_value = AK4114_PARITY_ERRORS,
330 },
331 {
332 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
333 	.name =		"IEC958 V-Bit Errors",
334 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
335 	.info =		snd_ak4114_in_error_info,
336 	.get =		snd_ak4114_in_error_get,
337 	.private_value = AK4114_V_BIT_ERRORS,
338 },
339 {
340 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
341 	.name =		"IEC958 C-CRC Errors",
342 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
343 	.info =		snd_ak4114_in_error_info,
344 	.get =		snd_ak4114_in_error_get,
345 	.private_value = AK4114_CCRC_ERRORS,
346 },
347 {
348 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
349 	.name =		"IEC958 Q-CRC Errors",
350 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
351 	.info =		snd_ak4114_in_error_info,
352 	.get =		snd_ak4114_in_error_get,
353 	.private_value = AK4114_QCRC_ERRORS,
354 },
355 {
356 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
357 	.name =		"IEC958 External Rate",
358 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
359 	.info =		snd_ak4114_rate_info,
360 	.get =		snd_ak4114_rate_get,
361 },
362 {
363 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
364 	.name =		SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
365 	.access =	SNDRV_CTL_ELEM_ACCESS_READ,
366 	.info =		snd_ak4114_spdif_mask_info,
367 	.get =		snd_ak4114_spdif_mask_get,
368 },
369 {
370 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
371 	.name =		SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
372 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
373 	.info =		snd_ak4114_spdif_info,
374 	.get =		snd_ak4114_spdif_playback_get,
375 	.put =		snd_ak4114_spdif_playback_put,
376 },
377 {
378 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
379 	.name =		SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
380 	.access =	SNDRV_CTL_ELEM_ACCESS_READ,
381 	.info =		snd_ak4114_spdif_mask_info,
382 	.get =		snd_ak4114_spdif_mask_get,
383 },
384 {
385 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
386 	.name =		SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
387 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
388 	.info =		snd_ak4114_spdif_info,
389 	.get =		snd_ak4114_spdif_get,
390 },
391 {
392 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
393 	.name =		"IEC958 Preamble Capture Default",
394 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
395 	.info =		snd_ak4114_spdif_pinfo,
396 	.get =		snd_ak4114_spdif_pget,
397 },
398 {
399 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
400 	.name =		"IEC958 Q-subcode Capture Default",
401 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
402 	.info =		snd_ak4114_spdif_qinfo,
403 	.get =		snd_ak4114_spdif_qget,
404 },
405 {
406 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
407 	.name =		"IEC958 Audio",
408 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
409 	.info =		snd_ak4114_in_bit_info,
410 	.get =		snd_ak4114_in_bit_get,
411 	.private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,
412 },
413 {
414 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
415 	.name =		"IEC958 Non-PCM Bitstream",
416 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
417 	.info =		snd_ak4114_in_bit_info,
418 	.get =		snd_ak4114_in_bit_get,
419 	.private_value = (6<<8) | AK4114_REG_RCS0,
420 },
421 {
422 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
423 	.name =		"IEC958 DTS Bitstream",
424 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
425 	.info =		snd_ak4114_in_bit_info,
426 	.get =		snd_ak4114_in_bit_get,
427 	.private_value = (3<<8) | AK4114_REG_RCS0,
428 },
429 {
430 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
431 	.name =		"IEC958 PPL Lock Status",
432 	.access =	SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
433 	.info =		snd_ak4114_in_bit_info,
434 	.get =		snd_ak4114_in_bit_get,
435 	.private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0,
436 }
437 };
438 
439 
snd_ak4114_proc_regs_read(struct snd_info_entry * entry,struct snd_info_buffer * buffer)440 static void snd_ak4114_proc_regs_read(struct snd_info_entry *entry,
441 		struct snd_info_buffer *buffer)
442 {
443 	struct ak4114 *ak4114 = entry->private_data;
444 	int reg, val;
445 	/* all ak4114 registers 0x00 - 0x1f */
446 	for (reg = 0; reg < 0x20; reg++) {
447 		val = reg_read(ak4114, reg);
448 		snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val);
449 	}
450 }
451 
snd_ak4114_proc_init(struct ak4114 * ak4114)452 static void snd_ak4114_proc_init(struct ak4114 *ak4114)
453 {
454 	snd_card_ro_proc_new(ak4114->card, "ak4114", ak4114,
455 			     snd_ak4114_proc_regs_read);
456 }
457 
snd_ak4114_build(struct ak4114 * ak4114,struct snd_pcm_substream * ply_substream,struct snd_pcm_substream * cap_substream)458 int snd_ak4114_build(struct ak4114 *ak4114,
459 		     struct snd_pcm_substream *ply_substream,
460 		     struct snd_pcm_substream *cap_substream)
461 {
462 	struct snd_kcontrol *kctl;
463 	unsigned int idx;
464 	int err;
465 
466 	if (snd_BUG_ON(!cap_substream))
467 		return -EINVAL;
468 	ak4114->playback_substream = ply_substream;
469 	ak4114->capture_substream = cap_substream;
470 	for (idx = 0; idx < AK4114_CONTROLS; idx++) {
471 		kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114);
472 		if (kctl == NULL)
473 			return -ENOMEM;
474 		if (strstr(kctl->id.name, "Playback")) {
475 			if (ply_substream == NULL) {
476 				snd_ctl_free_one(kctl);
477 				ak4114->kctls[idx] = NULL;
478 				continue;
479 			}
480 			kctl->id.device = ply_substream->pcm->device;
481 			kctl->id.subdevice = ply_substream->number;
482 		} else {
483 			kctl->id.device = cap_substream->pcm->device;
484 			kctl->id.subdevice = cap_substream->number;
485 		}
486 		err = snd_ctl_add(ak4114->card, kctl);
487 		if (err < 0)
488 			return err;
489 		ak4114->kctls[idx] = kctl;
490 	}
491 	snd_ak4114_proc_init(ak4114);
492 	/* trigger workq */
493 	schedule_delayed_work(&ak4114->work, HZ / 10);
494 	return 0;
495 }
496 EXPORT_SYMBOL(snd_ak4114_build);
497 
498 /* notify kcontrols if any parameters are changed */
ak4114_notify(struct ak4114 * ak4114,unsigned char rcs0,unsigned char rcs1,unsigned char c0,unsigned char c1)499 static void ak4114_notify(struct ak4114 *ak4114,
500 			  unsigned char rcs0, unsigned char rcs1,
501 			  unsigned char c0, unsigned char c1)
502 {
503 	if (!ak4114->kctls[0])
504 		return;
505 
506 	if (rcs0 & AK4114_PAR)
507 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
508 			       &ak4114->kctls[0]->id);
509 	if (rcs0 & AK4114_V)
510 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
511 			       &ak4114->kctls[1]->id);
512 	if (rcs1 & AK4114_CCRC)
513 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
514 			       &ak4114->kctls[2]->id);
515 	if (rcs1 & AK4114_QCRC)
516 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
517 			       &ak4114->kctls[3]->id);
518 
519 	/* rate change */
520 	if (c1 & 0xf0)
521 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
522 			       &ak4114->kctls[4]->id);
523 
524 	if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
525 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
526 			       &ak4114->kctls[9]->id);
527 	if (c0 & AK4114_QINT)
528 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
529 			       &ak4114->kctls[10]->id);
530 
531 	if (c0 & AK4114_AUDION)
532 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
533 			       &ak4114->kctls[11]->id);
534 	if (c0 & AK4114_AUTO)
535 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
536 			       &ak4114->kctls[12]->id);
537 	if (c0 & AK4114_DTSCD)
538 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
539 			       &ak4114->kctls[13]->id);
540 	if (c0 & AK4114_UNLCK)
541 		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
542 			       &ak4114->kctls[14]->id);
543 }
544 
snd_ak4114_external_rate(struct ak4114 * ak4114)545 int snd_ak4114_external_rate(struct ak4114 *ak4114)
546 {
547 	unsigned char rcs1;
548 
549 	rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
550 	return external_rate(rcs1);
551 }
552 EXPORT_SYMBOL(snd_ak4114_external_rate);
553 
snd_ak4114_check_rate_and_errors(struct ak4114 * ak4114,unsigned int flags)554 int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
555 {
556 	struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
557 	unsigned long _flags;
558 	int res = 0;
559 	unsigned char rcs0, rcs1;
560 	unsigned char c0, c1;
561 
562 	rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
563 	if (flags & AK4114_CHECK_NO_STAT)
564 		goto __rate;
565 	rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
566 	spin_lock_irqsave(&ak4114->lock, _flags);
567 	if (rcs0 & AK4114_PAR)
568 		ak4114->errors[AK4114_PARITY_ERRORS]++;
569 	if (rcs1 & AK4114_V)
570 		ak4114->errors[AK4114_V_BIT_ERRORS]++;
571 	if (rcs1 & AK4114_CCRC)
572 		ak4114->errors[AK4114_CCRC_ERRORS]++;
573 	if (rcs1 & AK4114_QCRC)
574 		ak4114->errors[AK4114_QCRC_ERRORS]++;
575 	c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
576                      (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
577 	c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
578 	ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
579 	ak4114->rcs1 = rcs1;
580 	spin_unlock_irqrestore(&ak4114->lock, _flags);
581 
582 	ak4114_notify(ak4114, rcs0, rcs1, c0, c1);
583 	if (ak4114->change_callback && (c0 | c1) != 0)
584 		ak4114->change_callback(ak4114, c0, c1);
585 
586       __rate:
587 	/* compare rate */
588 	res = external_rate(rcs1);
589 	if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
590 		snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
591 		if (snd_pcm_running(ak4114->capture_substream)) {
592 			// printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
593 			snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
594 			res = 1;
595 		}
596 		snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);
597 	}
598 	return res;
599 }
600 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);
601 
ak4114_stats(struct work_struct * work)602 static void ak4114_stats(struct work_struct *work)
603 {
604 	struct ak4114 *chip = container_of(work, struct ak4114, work.work);
605 
606 	if (atomic_inc_return(&chip->wq_processing) == 1)
607 		snd_ak4114_check_rate_and_errors(chip, chip->check_flags);
608 	if (atomic_dec_and_test(&chip->wq_processing))
609 		schedule_delayed_work(&chip->work, HZ / 10);
610 }
611 
612 #ifdef CONFIG_PM
snd_ak4114_suspend(struct ak4114 * chip)613 void snd_ak4114_suspend(struct ak4114 *chip)
614 {
615 	atomic_inc(&chip->wq_processing); /* don't schedule new work */
616 	cancel_delayed_work_sync(&chip->work);
617 }
618 EXPORT_SYMBOL(snd_ak4114_suspend);
619 
snd_ak4114_resume(struct ak4114 * chip)620 void snd_ak4114_resume(struct ak4114 *chip)
621 {
622 	atomic_dec(&chip->wq_processing);
623 	snd_ak4114_reinit(chip);
624 }
625 EXPORT_SYMBOL(snd_ak4114_resume);
626 #endif
627