1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Support for Digigram Lola PCI-e boards
4 *
5 * Copyright (c) 2011 Takashi Iwai <tiwai@suse.de>
6 */
7
8 #include <linux/kernel.h>
9 #include <linux/init.h>
10 #include <linux/delay.h>
11 #include <sound/core.h>
12 #include <sound/pcm.h>
13 #include "lola.h"
14
15 unsigned int lola_sample_rate_convert(unsigned int coded)
16 {
17 unsigned int freq;
18
19 /* base frequency */
20 switch (coded & 0x3) {
21 case 0: freq = 48000; break;
22 case 1: freq = 44100; break;
23 case 2: freq = 32000; break;
24 default: return 0; /* error */
25 }
26
27 /* multiplier / devisor */
28 switch (coded & 0x1c) {
29 case (0 << 2): break;
30 case (4 << 2): break;
31 case (1 << 2): freq *= 2; break;
32 case (2 << 2): freq *= 4; break;
33 case (5 << 2): freq /= 2; break;
34 case (6 << 2): freq /= 4; break;
35 default: return 0; /* error */
36 }
37
38 /* ajustement */
39 switch (coded & 0x60) {
40 case (0 << 5): break;
41 case (1 << 5): freq = (freq * 999) / 1000; break;
42 case (2 << 5): freq = (freq * 1001) / 1000; break;
43 default: return 0; /* error */
44 }
45 return freq;
46 }
47
48 /*
49 * Granualrity
50 */
51
52 #define LOLA_MAXFREQ_AT_GRANULARITY_MIN 48000
53 #define LOLA_MAXFREQ_AT_GRANULARITY_BELOW_MAX 96000
54
55 static bool check_gran_clock_compatibility(struct lola *chip,
56 unsigned int val,
57 unsigned int freq)
58 {
59 if (!chip->granularity)
60 return true;
61
62 if (val < LOLA_GRANULARITY_MIN || val > LOLA_GRANULARITY_MAX ||
63 (val % LOLA_GRANULARITY_STEP) != 0)
64 return false;
65
66 if (val == LOLA_GRANULARITY_MIN) {
67 if (freq > LOLA_MAXFREQ_AT_GRANULARITY_MIN)
68 return false;
69 } else if (val < LOLA_GRANULARITY_MAX) {
70 if (freq > LOLA_MAXFREQ_AT_GRANULARITY_BELOW_MAX)
71 return false;
72 }
73 return true;
74 }
75
76 int lola_set_granularity(struct lola *chip, unsigned int val, bool force)
77 {
78 int err;
79
80 if (!force) {
81 if (val == chip->granularity)
82 return 0;
83 #if 0
84 /* change Gran only if there are no streams allocated ! */
85 if (chip->audio_in_alloc_mask || chip->audio_out_alloc_mask)
86 return -EBUSY;
87 #endif
88 if (!check_gran_clock_compatibility(chip, val,
89 chip->clock.cur_freq))
90 return -EINVAL;
91 }
92
93 chip->granularity = val;
94 val /= LOLA_GRANULARITY_STEP;
95
96 /* audio function group */
97 err = lola_codec_write(chip, 1, LOLA_VERB_SET_GRANULARITY_STEPS,
98 val, 0);
99 if (err < 0)
100 return err;
101 /* this can be a very slow function !!! */
102 usleep_range(400 * val, 20000);
103 return lola_codec_flush(chip);
104 }
105
106 /*
107 * Clock widget handling
108 */
109
110 int lola_init_clock_widget(struct lola *chip, int nid)
111 {
112 unsigned int val;
113 int i, j, nitems, nb_verbs, idx, idx_list;
114 int err;
115
116 err = lola_read_param(chip, nid, LOLA_PAR_AUDIO_WIDGET_CAP, &val);
117 if (err < 0) {
118 dev_err(chip->card->dev, "Can't read wcaps for 0x%x\n", nid);
119 return err;
120 }
121
122 if ((val & 0xfff00000) != 0x01f00000) { /* test SubType and Type */
123 dev_dbg(chip->card->dev, "No valid clock widget\n");
124 return 0;
125 }
126
127 chip->clock.nid = nid;
128 chip->clock.items = val & 0xff;
129 dev_dbg(chip->card->dev, "clock_list nid=%x, entries=%d\n", nid,
130 chip->clock.items);
131 if (chip->clock.items > MAX_SAMPLE_CLOCK_COUNT) {
132 dev_err(chip->card->dev, "CLOCK_LIST too big: %d\n",
133 chip->clock.items);
134 return -EINVAL;
135 }
136
137 nitems = chip->clock.items;
138 nb_verbs = DIV_ROUND_UP(nitems, 4);
139 idx = 0;
140 idx_list = 0;
141 for (i = 0; i < nb_verbs; i++) {
142 unsigned int res_ex;
143 unsigned short items[4];
144
145 err = lola_codec_read(chip, nid, LOLA_VERB_GET_CLOCK_LIST,
146 idx, 0, &val, &res_ex);
147 if (err < 0) {
148 dev_err(chip->card->dev, "Can't read CLOCK_LIST\n");
149 return -EINVAL;
150 }
151
152 items[0] = val & 0xfff;
153 items[1] = (val >> 16) & 0xfff;
154 items[2] = res_ex & 0xfff;
155 items[3] = (res_ex >> 16) & 0xfff;
156
157 for (j = 0; j < 4; j++) {
158 unsigned char type = items[j] >> 8;
159 unsigned int freq = items[j] & 0xff;
160 int format = LOLA_CLOCK_FORMAT_NONE;
161 bool add_clock = true;
162 if (type == LOLA_CLOCK_TYPE_INTERNAL) {
163 freq = lola_sample_rate_convert(freq);
164 if (freq < chip->sample_rate_min)
165 add_clock = false;
166 else if (freq == 48000) {
167 chip->clock.cur_index = idx_list;
168 chip->clock.cur_freq = 48000;
169 chip->clock.cur_valid = true;
170 }
171 } else if (type == LOLA_CLOCK_TYPE_VIDEO) {
172 freq = lola_sample_rate_convert(freq);
173 if (freq < chip->sample_rate_min)
174 add_clock = false;
175 /* video clock has a format (0:NTSC, 1:PAL)*/
176 if (items[j] & 0x80)
177 format = LOLA_CLOCK_FORMAT_NTSC;
178 else
179 format = LOLA_CLOCK_FORMAT_PAL;
180 }
181 if (add_clock) {
182 struct lola_sample_clock *sc;
183 sc = &chip->clock.sample_clock[idx_list];
184 sc->type = type;
185 sc->format = format;
186 sc->freq = freq;
187 /* keep the index used with the board */
188 chip->clock.idx_lookup[idx_list] = idx;
189 idx_list++;
190 } else {
191 chip->clock.items--;
192 }
193 if (++idx >= nitems)
194 break;
195 }
196 }
197 return 0;
198 }
199
200 /* enable unsolicited events of the clock widget */
201 int lola_enable_clock_events(struct lola *chip)
202 {
203 unsigned int res;
204 int err;
205
206 err = lola_codec_read(chip, chip->clock.nid,
207 LOLA_VERB_SET_UNSOLICITED_ENABLE,
208 LOLA_UNSOLICITED_ENABLE | LOLA_UNSOLICITED_TAG,
209 0, &res, NULL);
210 if (err < 0)
211 return err;
212 if (res) {
213 dev_warn(chip->card->dev, "error in enable_clock_events %d\n",
214 res);
215 return -EINVAL;
216 }
217 return 0;
218 }
219
220 int lola_set_clock_index(struct lola *chip, unsigned int idx)
221 {
222 unsigned int res;
223 int err;
224
225 err = lola_codec_read(chip, chip->clock.nid,
226 LOLA_VERB_SET_CLOCK_SELECT,
227 chip->clock.idx_lookup[idx],
228 0, &res, NULL);
229 if (err < 0)
230 return err;
231 if (res) {
232 dev_warn(chip->card->dev, "error in set_clock %d\n", res);
233 return -EINVAL;
234 }
235 return 0;
236 }
237
238 bool lola_update_ext_clock_freq(struct lola *chip, unsigned int val)
239 {
240 unsigned int tag;
241
242 /* the current EXTERNAL clock information gets updated by interrupt
243 * with an unsolicited response
244 */
245 if (!val)
246 return false;
247 tag = (val >> LOLA_UNSOL_RESP_TAG_OFFSET) & LOLA_UNSOLICITED_TAG_MASK;
248 if (tag != LOLA_UNSOLICITED_TAG)
249 return false;
250
251 /* only for current = external clocks */
252 if (chip->clock.sample_clock[chip->clock.cur_index].type !=
253 LOLA_CLOCK_TYPE_INTERNAL) {
254 chip->clock.cur_freq = lola_sample_rate_convert(val & 0x7f);
255 chip->clock.cur_valid = (val & 0x100) != 0;
256 }
257 return true;
258 }
259
260 int lola_set_clock(struct lola *chip, int idx)
261 {
262 int freq = 0;
263 bool valid = false;
264
265 if (idx == chip->clock.cur_index) {
266 /* current clock is allowed */
267 freq = chip->clock.cur_freq;
268 valid = chip->clock.cur_valid;
269 } else if (chip->clock.sample_clock[idx].type ==
270 LOLA_CLOCK_TYPE_INTERNAL) {
271 /* internal clocks allowed */
272 freq = chip->clock.sample_clock[idx].freq;
273 valid = true;
274 }
275
276 if (!freq || !valid)
277 return -EINVAL;
278
279 if (!check_gran_clock_compatibility(chip, chip->granularity, freq))
280 return -EINVAL;
281
282 if (idx != chip->clock.cur_index) {
283 int err = lola_set_clock_index(chip, idx);
284 if (err < 0)
285 return err;
286 /* update new settings */
287 chip->clock.cur_index = idx;
288 chip->clock.cur_freq = freq;
289 chip->clock.cur_valid = true;
290 }
291 return 0;
292 }
293
294 int lola_set_sample_rate(struct lola *chip, int rate)
295 {
296 int i;
297
298 if (chip->clock.cur_freq == rate && chip->clock.cur_valid)
299 return 0;
300 /* search for new dwClockIndex */
301 for (i = 0; i < chip->clock.items; i++) {
302 if (chip->clock.sample_clock[i].type == LOLA_CLOCK_TYPE_INTERNAL &&
303 chip->clock.sample_clock[i].freq == rate)
304 break;
305 }
306 if (i >= chip->clock.items)
307 return -EINVAL;
308 return lola_set_clock(chip, i);
309 }
310
311
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