xref: /openbmc/linux/sound/firewire/oxfw/oxfw-spkr.c (revision da607e19)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * oxfw-spkr.c - a part of driver for OXFW970/971 based devices
4  *
5  * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
6  */
7 
8 #include "oxfw.h"
9 
10 struct fw_spkr {
11 	bool mute;
12 	s16 volume[6];
13 	s16 volume_min;
14 	s16 volume_max;
15 
16 	unsigned int mixer_channels;
17 	u8 mute_fb_id;
18 	u8 volume_fb_id;
19 };
20 
21 enum control_action { CTL_READ, CTL_WRITE };
22 enum control_attribute {
23 	CTL_MIN		= 0x02,
24 	CTL_MAX		= 0x03,
25 	CTL_CURRENT	= 0x10,
26 };
27 
avc_audio_feature_mute(struct fw_unit * unit,u8 fb_id,bool * value,enum control_action action)28 static int avc_audio_feature_mute(struct fw_unit *unit, u8 fb_id, bool *value,
29 				  enum control_action action)
30 {
31 	u8 *buf;
32 	u8 response_ok;
33 	int err;
34 
35 	buf = kmalloc(11, GFP_KERNEL);
36 	if (!buf)
37 		return -ENOMEM;
38 
39 	if (action == CTL_READ) {
40 		buf[0] = 0x01;		/* AV/C, STATUS */
41 		response_ok = 0x0c;	/*       STABLE */
42 	} else {
43 		buf[0] = 0x00;		/* AV/C, CONTROL */
44 		response_ok = 0x09;	/*       ACCEPTED */
45 	}
46 	buf[1] = 0x08;			/* audio unit 0 */
47 	buf[2] = 0xb8;			/* FUNCTION BLOCK */
48 	buf[3] = 0x81;			/* function block type: feature */
49 	buf[4] = fb_id;			/* function block ID */
50 	buf[5] = 0x10;			/* control attribute: current */
51 	buf[6] = 0x02;			/* selector length */
52 	buf[7] = 0x00;			/* audio channel number */
53 	buf[8] = 0x01;			/* control selector: mute */
54 	buf[9] = 0x01;			/* control data length */
55 	if (action == CTL_READ)
56 		buf[10] = 0xff;
57 	else
58 		buf[10] = *value ? 0x70 : 0x60;
59 
60 	err = fcp_avc_transaction(unit, buf, 11, buf, 11, 0x3fe);
61 	if (err < 0)
62 		goto error;
63 	if (err < 11) {
64 		dev_err(&unit->device, "short FCP response\n");
65 		err = -EIO;
66 		goto error;
67 	}
68 	if (buf[0] != response_ok) {
69 		dev_err(&unit->device, "mute command failed\n");
70 		err = -EIO;
71 		goto error;
72 	}
73 	if (action == CTL_READ)
74 		*value = buf[10] == 0x70;
75 
76 	err = 0;
77 
78 error:
79 	kfree(buf);
80 
81 	return err;
82 }
83 
avc_audio_feature_volume(struct fw_unit * unit,u8 fb_id,s16 * value,unsigned int channel,enum control_attribute attribute,enum control_action action)84 static int avc_audio_feature_volume(struct fw_unit *unit, u8 fb_id, s16 *value,
85 				    unsigned int channel,
86 				    enum control_attribute attribute,
87 				    enum control_action action)
88 {
89 	u8 *buf;
90 	u8 response_ok;
91 	int err;
92 
93 	buf = kmalloc(12, GFP_KERNEL);
94 	if (!buf)
95 		return -ENOMEM;
96 
97 	if (action == CTL_READ) {
98 		buf[0] = 0x01;		/* AV/C, STATUS */
99 		response_ok = 0x0c;	/*       STABLE */
100 	} else {
101 		buf[0] = 0x00;		/* AV/C, CONTROL */
102 		response_ok = 0x09;	/*       ACCEPTED */
103 	}
104 	buf[1] = 0x08;			/* audio unit 0 */
105 	buf[2] = 0xb8;			/* FUNCTION BLOCK */
106 	buf[3] = 0x81;			/* function block type: feature */
107 	buf[4] = fb_id;			/* function block ID */
108 	buf[5] = attribute;		/* control attribute */
109 	buf[6] = 0x02;			/* selector length */
110 	buf[7] = channel;		/* audio channel number */
111 	buf[8] = 0x02;			/* control selector: volume */
112 	buf[9] = 0x02;			/* control data length */
113 	if (action == CTL_READ) {
114 		buf[10] = 0xff;
115 		buf[11] = 0xff;
116 	} else {
117 		buf[10] = *value >> 8;
118 		buf[11] = *value;
119 	}
120 
121 	err = fcp_avc_transaction(unit, buf, 12, buf, 12, 0x3fe);
122 	if (err < 0)
123 		goto error;
124 	if (err < 12) {
125 		dev_err(&unit->device, "short FCP response\n");
126 		err = -EIO;
127 		goto error;
128 	}
129 	if (buf[0] != response_ok) {
130 		dev_err(&unit->device, "volume command failed\n");
131 		err = -EIO;
132 		goto error;
133 	}
134 	if (action == CTL_READ)
135 		*value = (buf[10] << 8) | buf[11];
136 
137 	err = 0;
138 
139 error:
140 	kfree(buf);
141 
142 	return err;
143 }
144 
spkr_mute_get(struct snd_kcontrol * control,struct snd_ctl_elem_value * value)145 static int spkr_mute_get(struct snd_kcontrol *control,
146 			 struct snd_ctl_elem_value *value)
147 {
148 	struct snd_oxfw *oxfw = control->private_data;
149 	struct fw_spkr *spkr = oxfw->spec;
150 
151 	value->value.integer.value[0] = !spkr->mute;
152 
153 	return 0;
154 }
155 
spkr_mute_put(struct snd_kcontrol * control,struct snd_ctl_elem_value * value)156 static int spkr_mute_put(struct snd_kcontrol *control,
157 			 struct snd_ctl_elem_value *value)
158 {
159 	struct snd_oxfw *oxfw = control->private_data;
160 	struct fw_spkr *spkr = oxfw->spec;
161 	bool mute;
162 	int err;
163 
164 	mute = !value->value.integer.value[0];
165 
166 	if (mute == spkr->mute)
167 		return 0;
168 
169 	err = avc_audio_feature_mute(oxfw->unit, spkr->mute_fb_id, &mute,
170 				     CTL_WRITE);
171 	if (err < 0)
172 		return err;
173 	spkr->mute = mute;
174 
175 	return 1;
176 }
177 
spkr_volume_info(struct snd_kcontrol * control,struct snd_ctl_elem_info * info)178 static int spkr_volume_info(struct snd_kcontrol *control,
179 			    struct snd_ctl_elem_info *info)
180 {
181 	struct snd_oxfw *oxfw = control->private_data;
182 	struct fw_spkr *spkr = oxfw->spec;
183 
184 	info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
185 	info->count = spkr->mixer_channels;
186 	info->value.integer.min = spkr->volume_min;
187 	info->value.integer.max = spkr->volume_max;
188 
189 	return 0;
190 }
191 
192 static const u8 channel_map[6] = { 0, 1, 4, 5, 2, 3 };
193 
spkr_volume_get(struct snd_kcontrol * control,struct snd_ctl_elem_value * value)194 static int spkr_volume_get(struct snd_kcontrol *control,
195 			   struct snd_ctl_elem_value *value)
196 {
197 	struct snd_oxfw *oxfw = control->private_data;
198 	struct fw_spkr *spkr = oxfw->spec;
199 	unsigned int i;
200 
201 	for (i = 0; i < spkr->mixer_channels; ++i)
202 		value->value.integer.value[channel_map[i]] = spkr->volume[i];
203 
204 	return 0;
205 }
206 
spkr_volume_put(struct snd_kcontrol * control,struct snd_ctl_elem_value * value)207 static int spkr_volume_put(struct snd_kcontrol *control,
208 			   struct snd_ctl_elem_value *value)
209 {
210 	struct snd_oxfw *oxfw = control->private_data;
211 	struct fw_spkr *spkr = oxfw->spec;
212 	unsigned int i, changed_channels;
213 	bool equal_values = true;
214 	s16 volume;
215 	int err;
216 
217 	for (i = 0; i < spkr->mixer_channels; ++i) {
218 		if (value->value.integer.value[i] < spkr->volume_min ||
219 		    value->value.integer.value[i] > spkr->volume_max)
220 			return -EINVAL;
221 		if (value->value.integer.value[i] !=
222 		    value->value.integer.value[0])
223 			equal_values = false;
224 	}
225 
226 	changed_channels = 0;
227 	for (i = 0; i < spkr->mixer_channels; ++i)
228 		if (value->value.integer.value[channel_map[i]] !=
229 							spkr->volume[i])
230 			changed_channels |= 1 << (i + 1);
231 
232 	if (equal_values && changed_channels != 0)
233 		changed_channels = 1 << 0;
234 
235 	for (i = 0; i <= spkr->mixer_channels; ++i) {
236 		volume = value->value.integer.value[channel_map[i ? i - 1 : 0]];
237 		if (changed_channels & (1 << i)) {
238 			err = avc_audio_feature_volume(oxfw->unit,
239 						  spkr->volume_fb_id, &volume,
240 						  i, CTL_CURRENT, CTL_WRITE);
241 			if (err < 0)
242 				return err;
243 		}
244 		if (i > 0)
245 			spkr->volume[i - 1] = volume;
246 	}
247 
248 	return changed_channels != 0;
249 }
250 
snd_oxfw_add_spkr(struct snd_oxfw * oxfw,bool is_lacie)251 int snd_oxfw_add_spkr(struct snd_oxfw *oxfw, bool is_lacie)
252 {
253 	static const struct snd_kcontrol_new controls[] = {
254 		{
255 			.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
256 			.name = "PCM Playback Switch",
257 			.info = snd_ctl_boolean_mono_info,
258 			.get = spkr_mute_get,
259 			.put = spkr_mute_put,
260 		},
261 		{
262 			.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
263 			.name = "PCM Playback Volume",
264 			.info = spkr_volume_info,
265 			.get = spkr_volume_get,
266 			.put = spkr_volume_put,
267 		},
268 	};
269 	struct fw_spkr *spkr;
270 	unsigned int i, first_ch;
271 	int err;
272 
273 	spkr = devm_kzalloc(&oxfw->card->card_dev, sizeof(struct fw_spkr),
274 			    GFP_KERNEL);
275 	if (!spkr)
276 		return -ENOMEM;
277 	oxfw->spec = spkr;
278 
279 	if (is_lacie) {
280 		spkr->mixer_channels = 1;
281 		spkr->mute_fb_id = 0x01;
282 		spkr->volume_fb_id = 0x01;
283 	} else {
284 		spkr->mixer_channels = 6;
285 		spkr->mute_fb_id = 0x01;
286 		spkr->volume_fb_id = 0x02;
287 	}
288 
289 	err = avc_audio_feature_volume(oxfw->unit, spkr->volume_fb_id,
290 				       &spkr->volume_min, 0, CTL_MIN, CTL_READ);
291 	if (err < 0)
292 		return err;
293 	err = avc_audio_feature_volume(oxfw->unit, spkr->volume_fb_id,
294 				       &spkr->volume_max, 0, CTL_MAX, CTL_READ);
295 	if (err < 0)
296 		return err;
297 
298 	err = avc_audio_feature_mute(oxfw->unit, spkr->mute_fb_id, &spkr->mute,
299 				     CTL_READ);
300 	if (err < 0)
301 		return err;
302 
303 	first_ch = spkr->mixer_channels == 1 ? 0 : 1;
304 	for (i = 0; i < spkr->mixer_channels; ++i) {
305 		err = avc_audio_feature_volume(oxfw->unit, spkr->volume_fb_id,
306 					       &spkr->volume[i], first_ch + i,
307 					       CTL_CURRENT, CTL_READ);
308 		if (err < 0)
309 			return err;
310 	}
311 
312 	for (i = 0; i < ARRAY_SIZE(controls); ++i) {
313 		err = snd_ctl_add(oxfw->card,
314 				  snd_ctl_new1(&controls[i], oxfw));
315 		if (err < 0)
316 			return err;
317 	}
318 
319 	return 0;
320 }
321