xref: /openbmc/linux/sound/usb/6fire/control.c (revision 9ab0cb30)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Linux driver for TerraTec DMX 6Fire USB
4  *
5  * Mixer control
6  *
7  * Author:	Torsten Schenk <torsten.schenk@zoho.com>
8  * Created:	Jan 01, 2011
9  * Copyright:	(C) Torsten Schenk
10  *
11  * Thanks to:
12  * - Holger Ruckdeschel: he found out how to control individual channel
13  *   volumes and introduced mute switch
14  */
15 
16 #include <linux/interrupt.h>
17 #include <sound/control.h>
18 #include <sound/tlv.h>
19 
20 #include "control.h"
21 #include "comm.h"
22 #include "chip.h"
23 
24 static const char * const opt_coax_texts[2] = { "Optical", "Coax" };
25 static const char * const line_phono_texts[2] = { "Line", "Phono" };
26 
27 /*
28  * data that needs to be sent to device. sets up card internal stuff.
29  * values dumped from windows driver and filtered by trial'n'error.
30  */
31 static const struct {
32 	u8 type;
33 	u8 reg;
34 	u8 value;
35 }
36 init_data[] = {
37 	{ 0x22, 0x00, 0x00 }, { 0x20, 0x00, 0x08 }, { 0x22, 0x01, 0x01 },
38 	{ 0x20, 0x01, 0x08 }, { 0x22, 0x02, 0x00 }, { 0x20, 0x02, 0x08 },
39 	{ 0x22, 0x03, 0x00 }, { 0x20, 0x03, 0x08 }, { 0x22, 0x04, 0x00 },
40 	{ 0x20, 0x04, 0x08 }, { 0x22, 0x05, 0x01 }, { 0x20, 0x05, 0x08 },
41 	{ 0x22, 0x04, 0x01 }, { 0x12, 0x04, 0x00 }, { 0x12, 0x05, 0x00 },
42 	{ 0x12, 0x0d, 0x38 }, { 0x12, 0x21, 0x82 }, { 0x12, 0x22, 0x80 },
43 	{ 0x12, 0x23, 0x00 }, { 0x12, 0x06, 0x02 }, { 0x12, 0x03, 0x00 },
44 	{ 0x12, 0x02, 0x00 }, { 0x22, 0x03, 0x01 },
45 	{ 0 } /* TERMINATING ENTRY */
46 };
47 
48 static const int rates_altsetting[] = { 1, 1, 2, 2, 3, 3 };
49 /* values to write to soundcard register for all samplerates */
50 static const u16 rates_6fire_vl[] = {0x00, 0x01, 0x00, 0x01, 0x00, 0x01};
51 static const u16 rates_6fire_vh[] = {0x11, 0x11, 0x10, 0x10, 0x00, 0x00};
52 
53 static DECLARE_TLV_DB_MINMAX(tlv_output, -9000, 0);
54 static DECLARE_TLV_DB_MINMAX(tlv_input, -1500, 1500);
55 
56 enum {
57 	DIGITAL_THRU_ONLY_SAMPLERATE = 3
58 };
59 
usb6fire_control_output_vol_update(struct control_runtime * rt)60 static void usb6fire_control_output_vol_update(struct control_runtime *rt)
61 {
62 	struct comm_runtime *comm_rt = rt->chip->comm;
63 	int i;
64 
65 	if (comm_rt)
66 		for (i = 0; i < 6; i++)
67 			if (!(rt->ovol_updated & (1 << i))) {
68 				comm_rt->write8(comm_rt, 0x12, 0x0f + i,
69 					180 - rt->output_vol[i]);
70 				rt->ovol_updated |= 1 << i;
71 			}
72 }
73 
usb6fire_control_output_mute_update(struct control_runtime * rt)74 static void usb6fire_control_output_mute_update(struct control_runtime *rt)
75 {
76 	struct comm_runtime *comm_rt = rt->chip->comm;
77 
78 	if (comm_rt)
79 		comm_rt->write8(comm_rt, 0x12, 0x0e, ~rt->output_mute);
80 }
81 
usb6fire_control_input_vol_update(struct control_runtime * rt)82 static void usb6fire_control_input_vol_update(struct control_runtime *rt)
83 {
84 	struct comm_runtime *comm_rt = rt->chip->comm;
85 	int i;
86 
87 	if (comm_rt)
88 		for (i = 0; i < 2; i++)
89 			if (!(rt->ivol_updated & (1 << i))) {
90 				comm_rt->write8(comm_rt, 0x12, 0x1c + i,
91 					rt->input_vol[i] & 0x3f);
92 				rt->ivol_updated |= 1 << i;
93 			}
94 }
95 
usb6fire_control_line_phono_update(struct control_runtime * rt)96 static void usb6fire_control_line_phono_update(struct control_runtime *rt)
97 {
98 	struct comm_runtime *comm_rt = rt->chip->comm;
99 	if (comm_rt) {
100 		comm_rt->write8(comm_rt, 0x22, 0x02, rt->line_phono_switch);
101 		comm_rt->write8(comm_rt, 0x21, 0x02, rt->line_phono_switch);
102 	}
103 }
104 
usb6fire_control_opt_coax_update(struct control_runtime * rt)105 static void usb6fire_control_opt_coax_update(struct control_runtime *rt)
106 {
107 	struct comm_runtime *comm_rt = rt->chip->comm;
108 	if (comm_rt) {
109 		comm_rt->write8(comm_rt, 0x22, 0x00, rt->opt_coax_switch);
110 		comm_rt->write8(comm_rt, 0x21, 0x00, rt->opt_coax_switch);
111 	}
112 }
113 
usb6fire_control_set_rate(struct control_runtime * rt,int rate)114 static int usb6fire_control_set_rate(struct control_runtime *rt, int rate)
115 {
116 	int ret;
117 	struct usb_device *device = rt->chip->dev;
118 	struct comm_runtime *comm_rt = rt->chip->comm;
119 
120 	if (rate < 0 || rate >= CONTROL_N_RATES)
121 		return -EINVAL;
122 
123 	ret = usb_set_interface(device, 1, rates_altsetting[rate]);
124 	if (ret < 0)
125 		return ret;
126 
127 	/* set soundcard clock */
128 	ret = comm_rt->write16(comm_rt, 0x02, 0x01, rates_6fire_vl[rate],
129 			rates_6fire_vh[rate]);
130 	if (ret < 0)
131 		return ret;
132 
133 	return 0;
134 }
135 
usb6fire_control_set_channels(struct control_runtime * rt,int n_analog_out,int n_analog_in,bool spdif_out,bool spdif_in)136 static int usb6fire_control_set_channels(
137 	struct control_runtime *rt, int n_analog_out,
138 	int n_analog_in, bool spdif_out, bool spdif_in)
139 {
140 	int ret;
141 	struct comm_runtime *comm_rt = rt->chip->comm;
142 
143 	/* enable analog inputs and outputs
144 	 * (one bit per stereo-channel) */
145 	ret = comm_rt->write16(comm_rt, 0x02, 0x02,
146 			(1 << (n_analog_out / 2)) - 1,
147 			(1 << (n_analog_in / 2)) - 1);
148 	if (ret < 0)
149 		return ret;
150 
151 	/* disable digital inputs and outputs */
152 	/* TODO: use spdif_x to enable/disable digital channels */
153 	ret = comm_rt->write16(comm_rt, 0x02, 0x03, 0x00, 0x00);
154 	if (ret < 0)
155 		return ret;
156 
157 	return 0;
158 }
159 
usb6fire_control_streaming_update(struct control_runtime * rt)160 static int usb6fire_control_streaming_update(struct control_runtime *rt)
161 {
162 	struct comm_runtime *comm_rt = rt->chip->comm;
163 
164 	if (comm_rt) {
165 		if (!rt->usb_streaming && rt->digital_thru_switch)
166 			usb6fire_control_set_rate(rt,
167 				DIGITAL_THRU_ONLY_SAMPLERATE);
168 		return comm_rt->write16(comm_rt, 0x02, 0x00, 0x00,
169 			(rt->usb_streaming ? 0x01 : 0x00) |
170 			(rt->digital_thru_switch ? 0x08 : 0x00));
171 	}
172 	return -EINVAL;
173 }
174 
usb6fire_control_output_vol_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)175 static int usb6fire_control_output_vol_info(struct snd_kcontrol *kcontrol,
176 		struct snd_ctl_elem_info *uinfo)
177 {
178 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
179 	uinfo->count = 2;
180 	uinfo->value.integer.min = 0;
181 	uinfo->value.integer.max = 180;
182 	return 0;
183 }
184 
usb6fire_control_output_vol_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)185 static int usb6fire_control_output_vol_put(struct snd_kcontrol *kcontrol,
186 		struct snd_ctl_elem_value *ucontrol)
187 {
188 	struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
189 	unsigned int ch = kcontrol->private_value;
190 	int changed = 0;
191 
192 	if (ch > 4) {
193 		dev_err(&rt->chip->dev->dev,
194 			"Invalid channel in volume control.");
195 		return -EINVAL;
196 	}
197 
198 	if (rt->output_vol[ch] != ucontrol->value.integer.value[0]) {
199 		rt->output_vol[ch] = ucontrol->value.integer.value[0];
200 		rt->ovol_updated &= ~(1 << ch);
201 		changed = 1;
202 	}
203 	if (rt->output_vol[ch + 1] != ucontrol->value.integer.value[1]) {
204 		rt->output_vol[ch + 1] = ucontrol->value.integer.value[1];
205 		rt->ovol_updated &= ~(2 << ch);
206 		changed = 1;
207 	}
208 
209 	if (changed)
210 		usb6fire_control_output_vol_update(rt);
211 
212 	return changed;
213 }
214 
usb6fire_control_output_vol_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)215 static int usb6fire_control_output_vol_get(struct snd_kcontrol *kcontrol,
216 		struct snd_ctl_elem_value *ucontrol)
217 {
218 	struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
219 	unsigned int ch = kcontrol->private_value;
220 
221 	if (ch > 4) {
222 		dev_err(&rt->chip->dev->dev,
223 			"Invalid channel in volume control.");
224 		return -EINVAL;
225 	}
226 
227 	ucontrol->value.integer.value[0] = rt->output_vol[ch];
228 	ucontrol->value.integer.value[1] = rt->output_vol[ch + 1];
229 	return 0;
230 }
231 
usb6fire_control_output_mute_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)232 static int usb6fire_control_output_mute_put(struct snd_kcontrol *kcontrol,
233 	struct snd_ctl_elem_value *ucontrol)
234 {
235 	struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
236 	unsigned int ch = kcontrol->private_value;
237 	u8 old = rt->output_mute;
238 	u8 value = 0;
239 
240 	if (ch > 4) {
241 		dev_err(&rt->chip->dev->dev,
242 			"Invalid channel in volume control.");
243 		return -EINVAL;
244 	}
245 
246 	rt->output_mute &= ~(3 << ch);
247 	if (ucontrol->value.integer.value[0])
248 		value |= 1;
249 	if (ucontrol->value.integer.value[1])
250 		value |= 2;
251 	rt->output_mute |= value << ch;
252 
253 	if (rt->output_mute != old)
254 		usb6fire_control_output_mute_update(rt);
255 
256 	return rt->output_mute != old;
257 }
258 
usb6fire_control_output_mute_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)259 static int usb6fire_control_output_mute_get(struct snd_kcontrol *kcontrol,
260 	struct snd_ctl_elem_value *ucontrol)
261 {
262 	struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
263 	unsigned int ch = kcontrol->private_value;
264 	u8 value = rt->output_mute >> ch;
265 
266 	if (ch > 4) {
267 		dev_err(&rt->chip->dev->dev,
268 			"Invalid channel in volume control.");
269 		return -EINVAL;
270 	}
271 
272 	ucontrol->value.integer.value[0] = 1 & value;
273 	value >>= 1;
274 	ucontrol->value.integer.value[1] = 1 & value;
275 
276 	return 0;
277 }
278 
usb6fire_control_input_vol_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)279 static int usb6fire_control_input_vol_info(struct snd_kcontrol *kcontrol,
280 		struct snd_ctl_elem_info *uinfo)
281 {
282 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
283 	uinfo->count = 2;
284 	uinfo->value.integer.min = 0;
285 	uinfo->value.integer.max = 30;
286 	return 0;
287 }
288 
usb6fire_control_input_vol_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)289 static int usb6fire_control_input_vol_put(struct snd_kcontrol *kcontrol,
290 		struct snd_ctl_elem_value *ucontrol)
291 {
292 	struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
293 	int changed = 0;
294 
295 	if (rt->input_vol[0] != ucontrol->value.integer.value[0]) {
296 		rt->input_vol[0] = ucontrol->value.integer.value[0] - 15;
297 		rt->ivol_updated &= ~(1 << 0);
298 		changed = 1;
299 	}
300 	if (rt->input_vol[1] != ucontrol->value.integer.value[1]) {
301 		rt->input_vol[1] = ucontrol->value.integer.value[1] - 15;
302 		rt->ivol_updated &= ~(1 << 1);
303 		changed = 1;
304 	}
305 
306 	if (changed)
307 		usb6fire_control_input_vol_update(rt);
308 
309 	return changed;
310 }
311 
usb6fire_control_input_vol_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)312 static int usb6fire_control_input_vol_get(struct snd_kcontrol *kcontrol,
313 		struct snd_ctl_elem_value *ucontrol)
314 {
315 	struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
316 
317 	ucontrol->value.integer.value[0] = rt->input_vol[0] + 15;
318 	ucontrol->value.integer.value[1] = rt->input_vol[1] + 15;
319 
320 	return 0;
321 }
322 
usb6fire_control_line_phono_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)323 static int usb6fire_control_line_phono_info(struct snd_kcontrol *kcontrol,
324 		struct snd_ctl_elem_info *uinfo)
325 {
326 	return snd_ctl_enum_info(uinfo, 1, 2, line_phono_texts);
327 }
328 
usb6fire_control_line_phono_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)329 static int usb6fire_control_line_phono_put(struct snd_kcontrol *kcontrol,
330 		struct snd_ctl_elem_value *ucontrol)
331 {
332 	struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
333 	int changed = 0;
334 	if (rt->line_phono_switch != ucontrol->value.integer.value[0]) {
335 		rt->line_phono_switch = ucontrol->value.integer.value[0];
336 		usb6fire_control_line_phono_update(rt);
337 		changed = 1;
338 	}
339 	return changed;
340 }
341 
usb6fire_control_line_phono_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)342 static int usb6fire_control_line_phono_get(struct snd_kcontrol *kcontrol,
343 		struct snd_ctl_elem_value *ucontrol)
344 {
345 	struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
346 	ucontrol->value.integer.value[0] = rt->line_phono_switch;
347 	return 0;
348 }
349 
usb6fire_control_opt_coax_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)350 static int usb6fire_control_opt_coax_info(struct snd_kcontrol *kcontrol,
351 		struct snd_ctl_elem_info *uinfo)
352 {
353 	return snd_ctl_enum_info(uinfo, 1, 2, opt_coax_texts);
354 }
355 
usb6fire_control_opt_coax_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)356 static int usb6fire_control_opt_coax_put(struct snd_kcontrol *kcontrol,
357 		struct snd_ctl_elem_value *ucontrol)
358 {
359 	struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
360 	int changed = 0;
361 
362 	if (rt->opt_coax_switch != ucontrol->value.enumerated.item[0]) {
363 		rt->opt_coax_switch = ucontrol->value.enumerated.item[0];
364 		usb6fire_control_opt_coax_update(rt);
365 		changed = 1;
366 	}
367 	return changed;
368 }
369 
usb6fire_control_opt_coax_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)370 static int usb6fire_control_opt_coax_get(struct snd_kcontrol *kcontrol,
371 		struct snd_ctl_elem_value *ucontrol)
372 {
373 	struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
374 	ucontrol->value.enumerated.item[0] = rt->opt_coax_switch;
375 	return 0;
376 }
377 
usb6fire_control_digital_thru_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)378 static int usb6fire_control_digital_thru_put(struct snd_kcontrol *kcontrol,
379 		struct snd_ctl_elem_value *ucontrol)
380 {
381 	struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
382 	int changed = 0;
383 
384 	if (rt->digital_thru_switch != ucontrol->value.integer.value[0]) {
385 		rt->digital_thru_switch = ucontrol->value.integer.value[0];
386 		usb6fire_control_streaming_update(rt);
387 		changed = 1;
388 	}
389 	return changed;
390 }
391 
usb6fire_control_digital_thru_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)392 static int usb6fire_control_digital_thru_get(struct snd_kcontrol *kcontrol,
393 		struct snd_ctl_elem_value *ucontrol)
394 {
395 	struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
396 	ucontrol->value.integer.value[0] = rt->digital_thru_switch;
397 	return 0;
398 }
399 
400 static const struct snd_kcontrol_new vol_elements[] = {
401 	{
402 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
403 		.name = "Analog Playback Volume",
404 		.index = 0,
405 		.private_value = 0,
406 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
407 			SNDRV_CTL_ELEM_ACCESS_TLV_READ,
408 		.info = usb6fire_control_output_vol_info,
409 		.get = usb6fire_control_output_vol_get,
410 		.put = usb6fire_control_output_vol_put,
411 		.tlv = { .p = tlv_output }
412 	},
413 	{
414 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
415 		.name = "Analog Playback Volume",
416 		.index = 1,
417 		.private_value = 2,
418 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
419 			SNDRV_CTL_ELEM_ACCESS_TLV_READ,
420 		.info = usb6fire_control_output_vol_info,
421 		.get = usb6fire_control_output_vol_get,
422 		.put = usb6fire_control_output_vol_put,
423 		.tlv = { .p = tlv_output }
424 	},
425 	{
426 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
427 		.name = "Analog Playback Volume",
428 		.index = 2,
429 		.private_value = 4,
430 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
431 			SNDRV_CTL_ELEM_ACCESS_TLV_READ,
432 		.info = usb6fire_control_output_vol_info,
433 		.get = usb6fire_control_output_vol_get,
434 		.put = usb6fire_control_output_vol_put,
435 		.tlv = { .p = tlv_output }
436 	},
437 	{}
438 };
439 
440 static const struct snd_kcontrol_new mute_elements[] = {
441 	{
442 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
443 		.name = "Analog Playback Switch",
444 		.index = 0,
445 		.private_value = 0,
446 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
447 		.info = snd_ctl_boolean_stereo_info,
448 		.get = usb6fire_control_output_mute_get,
449 		.put = usb6fire_control_output_mute_put,
450 	},
451 	{
452 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
453 		.name = "Analog Playback Switch",
454 		.index = 1,
455 		.private_value = 2,
456 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
457 		.info = snd_ctl_boolean_stereo_info,
458 		.get = usb6fire_control_output_mute_get,
459 		.put = usb6fire_control_output_mute_put,
460 	},
461 	{
462 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
463 		.name = "Analog Playback Switch",
464 		.index = 2,
465 		.private_value = 4,
466 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
467 		.info = snd_ctl_boolean_stereo_info,
468 		.get = usb6fire_control_output_mute_get,
469 		.put = usb6fire_control_output_mute_put,
470 	},
471 	{}
472 };
473 
474 static const struct snd_kcontrol_new elements[] = {
475 	{
476 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
477 		.name = "Line/Phono Capture Route",
478 		.index = 0,
479 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
480 		.info = usb6fire_control_line_phono_info,
481 		.get = usb6fire_control_line_phono_get,
482 		.put = usb6fire_control_line_phono_put
483 	},
484 	{
485 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
486 		.name = "Opt/Coax Capture Route",
487 		.index = 0,
488 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
489 		.info = usb6fire_control_opt_coax_info,
490 		.get = usb6fire_control_opt_coax_get,
491 		.put = usb6fire_control_opt_coax_put
492 	},
493 	{
494 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
495 		.name = "Digital Thru Playback Route",
496 		.index = 0,
497 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
498 		.info = snd_ctl_boolean_mono_info,
499 		.get = usb6fire_control_digital_thru_get,
500 		.put = usb6fire_control_digital_thru_put
501 	},
502 	{
503 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
504 		.name = "Analog Capture Volume",
505 		.index = 0,
506 		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
507 			SNDRV_CTL_ELEM_ACCESS_TLV_READ,
508 		.info = usb6fire_control_input_vol_info,
509 		.get = usb6fire_control_input_vol_get,
510 		.put = usb6fire_control_input_vol_put,
511 		.tlv = { .p = tlv_input }
512 	},
513 	{}
514 };
515 
usb6fire_control_add_virtual(struct control_runtime * rt,struct snd_card * card,char * name,const struct snd_kcontrol_new * elems)516 static int usb6fire_control_add_virtual(
517 	struct control_runtime *rt,
518 	struct snd_card *card,
519 	char *name,
520 	const struct snd_kcontrol_new *elems)
521 {
522 	int ret;
523 	int i;
524 	struct snd_kcontrol *vmaster =
525 		snd_ctl_make_virtual_master(name, tlv_output);
526 	struct snd_kcontrol *control;
527 
528 	if (!vmaster)
529 		return -ENOMEM;
530 	ret = snd_ctl_add(card, vmaster);
531 	if (ret < 0)
532 		return ret;
533 
534 	i = 0;
535 	while (elems[i].name) {
536 		control = snd_ctl_new1(&elems[i], rt);
537 		if (!control)
538 			return -ENOMEM;
539 		ret = snd_ctl_add(card, control);
540 		if (ret < 0)
541 			return ret;
542 		ret = snd_ctl_add_follower(vmaster, control);
543 		if (ret < 0)
544 			return ret;
545 		i++;
546 	}
547 	return 0;
548 }
549 
usb6fire_control_init(struct sfire_chip * chip)550 int usb6fire_control_init(struct sfire_chip *chip)
551 {
552 	int i;
553 	int ret;
554 	struct control_runtime *rt = kzalloc(sizeof(struct control_runtime),
555 			GFP_KERNEL);
556 	struct comm_runtime *comm_rt = chip->comm;
557 
558 	if (!rt)
559 		return -ENOMEM;
560 
561 	rt->chip = chip;
562 	rt->update_streaming = usb6fire_control_streaming_update;
563 	rt->set_rate = usb6fire_control_set_rate;
564 	rt->set_channels = usb6fire_control_set_channels;
565 
566 	i = 0;
567 	while (init_data[i].type) {
568 		comm_rt->write8(comm_rt, init_data[i].type, init_data[i].reg,
569 				init_data[i].value);
570 		i++;
571 	}
572 
573 	usb6fire_control_opt_coax_update(rt);
574 	usb6fire_control_line_phono_update(rt);
575 	usb6fire_control_output_vol_update(rt);
576 	usb6fire_control_output_mute_update(rt);
577 	usb6fire_control_input_vol_update(rt);
578 	usb6fire_control_streaming_update(rt);
579 
580 	ret = usb6fire_control_add_virtual(rt, chip->card,
581 		"Master Playback Volume", vol_elements);
582 	if (ret) {
583 		dev_err(&chip->dev->dev, "cannot add control.\n");
584 		kfree(rt);
585 		return ret;
586 	}
587 	ret = usb6fire_control_add_virtual(rt, chip->card,
588 		"Master Playback Switch", mute_elements);
589 	if (ret) {
590 		dev_err(&chip->dev->dev, "cannot add control.\n");
591 		kfree(rt);
592 		return ret;
593 	}
594 
595 	i = 0;
596 	while (elements[i].name) {
597 		ret = snd_ctl_add(chip->card, snd_ctl_new1(&elements[i], rt));
598 		if (ret < 0) {
599 			kfree(rt);
600 			dev_err(&chip->dev->dev, "cannot add control.\n");
601 			return ret;
602 		}
603 		i++;
604 	}
605 
606 	chip->control = rt;
607 	return 0;
608 }
609 
usb6fire_control_abort(struct sfire_chip * chip)610 void usb6fire_control_abort(struct sfire_chip *chip)
611 {}
612 
usb6fire_control_destroy(struct sfire_chip * chip)613 void usb6fire_control_destroy(struct sfire_chip *chip)
614 {
615 	kfree(chip->control);
616 	chip->control = NULL;
617 }
618