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15#include <linux/slab.h>
16#include <linux/device.h>
17#include <linux/regmap.h>
18#include <linux/export.h>
19#include <linux/pm.h>
20#include <linux/pm_runtime.h>
21#include <sound/core.h>
22#include <sound/hdaudio.h>
23#include <sound/hda_regmap.h>
24
25static int codec_pm_lock(struct hdac_device *codec)
26{
27 return snd_hdac_keep_power_up(codec);
28}
29
30static void codec_pm_unlock(struct hdac_device *codec, int lock)
31{
32 if (lock == 1)
33 snd_hdac_power_down_pm(codec);
34}
35
36#define get_verb(reg) (((reg) >> 8) & 0xfff)
37
38static bool hda_volatile_reg(struct device *dev, unsigned int reg)
39{
40 struct hdac_device *codec = dev_to_hdac_dev(dev);
41 unsigned int verb = get_verb(reg);
42
43 switch (verb) {
44 case AC_VERB_GET_PROC_COEF:
45 return !codec->cache_coef;
46 case AC_VERB_GET_COEF_INDEX:
47 case AC_VERB_GET_PROC_STATE:
48 case AC_VERB_GET_POWER_STATE:
49 case AC_VERB_GET_PIN_SENSE:
50 case AC_VERB_GET_HDMI_DIP_SIZE:
51 case AC_VERB_GET_HDMI_ELDD:
52 case AC_VERB_GET_HDMI_DIP_INDEX:
53 case AC_VERB_GET_HDMI_DIP_DATA:
54 case AC_VERB_GET_HDMI_DIP_XMIT:
55 case AC_VERB_GET_HDMI_CP_CTRL:
56 case AC_VERB_GET_HDMI_CHAN_SLOT:
57 case AC_VERB_GET_DEVICE_SEL:
58 case AC_VERB_GET_DEVICE_LIST:
59 return true;
60 }
61
62 return false;
63}
64
65static bool hda_writeable_reg(struct device *dev, unsigned int reg)
66{
67 struct hdac_device *codec = dev_to_hdac_dev(dev);
68 unsigned int verb = get_verb(reg);
69 const unsigned int *v;
70 int i;
71
72 snd_array_for_each(&codec->vendor_verbs, i, v) {
73 if (verb == *v)
74 return true;
75 }
76
77 if (codec->caps_overwriting)
78 return true;
79
80 switch (verb & 0xf00) {
81 case AC_VERB_GET_STREAM_FORMAT:
82 case AC_VERB_GET_AMP_GAIN_MUTE:
83 return true;
84 case AC_VERB_GET_PROC_COEF:
85 return codec->cache_coef;
86 case 0xf00:
87 break;
88 default:
89 return false;
90 }
91
92 switch (verb) {
93 case AC_VERB_GET_CONNECT_SEL:
94 case AC_VERB_GET_SDI_SELECT:
95 case AC_VERB_GET_PIN_WIDGET_CONTROL:
96 case AC_VERB_GET_UNSOLICITED_RESPONSE:
97 case AC_VERB_GET_BEEP_CONTROL:
98 case AC_VERB_GET_EAPD_BTLENABLE:
99 case AC_VERB_GET_DIGI_CONVERT_1:
100 case AC_VERB_GET_DIGI_CONVERT_2:
101 case AC_VERB_GET_VOLUME_KNOB_CONTROL:
102 case AC_VERB_GET_GPIO_MASK:
103 case AC_VERB_GET_GPIO_DIRECTION:
104 case AC_VERB_GET_GPIO_DATA:
105 case AC_VERB_GET_GPIO_WAKE_MASK:
106 case AC_VERB_GET_GPIO_UNSOLICITED_RSP_MASK:
107 case AC_VERB_GET_GPIO_STICKY_MASK:
108 return true;
109 }
110
111 return false;
112}
113
114static bool hda_readable_reg(struct device *dev, unsigned int reg)
115{
116 struct hdac_device *codec = dev_to_hdac_dev(dev);
117 unsigned int verb = get_verb(reg);
118
119 if (codec->caps_overwriting)
120 return true;
121
122 switch (verb) {
123 case AC_VERB_PARAMETERS:
124 case AC_VERB_GET_CONNECT_LIST:
125 case AC_VERB_GET_SUBSYSTEM_ID:
126 return true;
127
128
129
130 case AC_VERB_GET_CONFIG_DEFAULT:
131 case AC_VERB_GET_CONV:
132 case AC_VERB_GET_CVT_CHAN_COUNT:
133 return true;
134 }
135
136 return hda_writeable_reg(dev, reg);
137}
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146
147static bool is_stereo_amp_verb(unsigned int reg)
148{
149 if (((reg >> 8) & 0x700) != AC_VERB_SET_AMP_GAIN_MUTE)
150 return false;
151 return (reg & (AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT)) ==
152 (AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT);
153}
154
155
156static int hda_reg_read_stereo_amp(struct hdac_device *codec,
157 unsigned int reg, unsigned int *val)
158{
159 unsigned int left, right;
160 int err;
161
162 reg &= ~(AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT);
163 err = snd_hdac_exec_verb(codec, reg | AC_AMP_GET_LEFT, 0, &left);
164 if (err < 0)
165 return err;
166 err = snd_hdac_exec_verb(codec, reg | AC_AMP_GET_RIGHT, 0, &right);
167 if (err < 0)
168 return err;
169 *val = left | (right << 8);
170 return 0;
171}
172
173
174static int hda_reg_write_stereo_amp(struct hdac_device *codec,
175 unsigned int reg, unsigned int val)
176{
177 int err;
178 unsigned int verb, left, right;
179
180 verb = AC_VERB_SET_AMP_GAIN_MUTE << 8;
181 if (reg & AC_AMP_GET_OUTPUT)
182 verb |= AC_AMP_SET_OUTPUT;
183 else
184 verb |= AC_AMP_SET_INPUT | ((reg & 0xf) << 8);
185 reg = (reg & ~0xfffff) | verb;
186
187 left = val & 0xff;
188 right = (val >> 8) & 0xff;
189 if (left == right) {
190 reg |= AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT;
191 return snd_hdac_exec_verb(codec, reg | left, 0, NULL);
192 }
193
194 err = snd_hdac_exec_verb(codec, reg | AC_AMP_SET_LEFT | left, 0, NULL);
195 if (err < 0)
196 return err;
197 err = snd_hdac_exec_verb(codec, reg | AC_AMP_SET_RIGHT | right, 0, NULL);
198 if (err < 0)
199 return err;
200 return 0;
201}
202
203
204static int hda_reg_read_coef(struct hdac_device *codec, unsigned int reg,
205 unsigned int *val)
206{
207 unsigned int verb;
208 int err;
209
210 if (!codec->cache_coef)
211 return -EINVAL;
212
213 verb = (reg & ~0xfff00) | (AC_VERB_SET_COEF_INDEX << 8);
214 err = snd_hdac_exec_verb(codec, verb, 0, NULL);
215 if (err < 0)
216 return err;
217 verb = (reg & ~0xfffff) | (AC_VERB_GET_COEF_INDEX << 8);
218 return snd_hdac_exec_verb(codec, verb, 0, val);
219}
220
221
222static int hda_reg_write_coef(struct hdac_device *codec, unsigned int reg,
223 unsigned int val)
224{
225 unsigned int verb;
226 int err;
227
228 if (!codec->cache_coef)
229 return -EINVAL;
230
231 verb = (reg & ~0xfff00) | (AC_VERB_SET_COEF_INDEX << 8);
232 err = snd_hdac_exec_verb(codec, verb, 0, NULL);
233 if (err < 0)
234 return err;
235 verb = (reg & ~0xfffff) | (AC_VERB_GET_COEF_INDEX << 8) |
236 (val & 0xffff);
237 return snd_hdac_exec_verb(codec, verb, 0, NULL);
238}
239
240static int hda_reg_read(void *context, unsigned int reg, unsigned int *val)
241{
242 struct hdac_device *codec = context;
243 int verb = get_verb(reg);
244 int err;
245 int pm_lock = 0;
246
247 if (verb != AC_VERB_GET_POWER_STATE) {
248 pm_lock = codec_pm_lock(codec);
249 if (pm_lock < 0)
250 return -EAGAIN;
251 }
252 reg |= (codec->addr << 28);
253 if (is_stereo_amp_verb(reg)) {
254 err = hda_reg_read_stereo_amp(codec, reg, val);
255 goto out;
256 }
257 if (verb == AC_VERB_GET_PROC_COEF) {
258 err = hda_reg_read_coef(codec, reg, val);
259 goto out;
260 }
261 if ((verb & 0x700) == AC_VERB_SET_AMP_GAIN_MUTE)
262 reg &= ~AC_AMP_FAKE_MUTE;
263
264 err = snd_hdac_exec_verb(codec, reg, 0, val);
265 if (err < 0)
266 goto out;
267
268 if (verb == AC_VERB_GET_POWER_STATE) {
269 if (*val & AC_PWRST_ERROR)
270 *val = -1;
271 else
272 *val = (*val >> 4) & 0x0f;
273 }
274 out:
275 codec_pm_unlock(codec, pm_lock);
276 return err;
277}
278
279static int hda_reg_write(void *context, unsigned int reg, unsigned int val)
280{
281 struct hdac_device *codec = context;
282 unsigned int verb;
283 int i, bytes, err;
284 int pm_lock = 0;
285
286 if (codec->caps_overwriting)
287 return 0;
288
289 reg &= ~0x00080000U;
290 reg |= (codec->addr << 28);
291 verb = get_verb(reg);
292
293 if (verb != AC_VERB_SET_POWER_STATE) {
294 pm_lock = codec_pm_lock(codec);
295 if (pm_lock < 0)
296 return codec->lazy_cache ? 0 : -EAGAIN;
297 }
298
299 if (is_stereo_amp_verb(reg)) {
300 err = hda_reg_write_stereo_amp(codec, reg, val);
301 goto out;
302 }
303
304 if (verb == AC_VERB_SET_PROC_COEF) {
305 err = hda_reg_write_coef(codec, reg, val);
306 goto out;
307 }
308
309 switch (verb & 0xf00) {
310 case AC_VERB_SET_AMP_GAIN_MUTE:
311 if ((reg & AC_AMP_FAKE_MUTE) && (val & AC_AMP_MUTE))
312 val = 0;
313 verb = AC_VERB_SET_AMP_GAIN_MUTE;
314 if (reg & AC_AMP_GET_LEFT)
315 verb |= AC_AMP_SET_LEFT >> 8;
316 else
317 verb |= AC_AMP_SET_RIGHT >> 8;
318 if (reg & AC_AMP_GET_OUTPUT) {
319 verb |= AC_AMP_SET_OUTPUT >> 8;
320 } else {
321 verb |= AC_AMP_SET_INPUT >> 8;
322 verb |= reg & 0xf;
323 }
324 break;
325 }
326
327 switch (verb) {
328 case AC_VERB_SET_DIGI_CONVERT_1:
329 bytes = 2;
330 break;
331 case AC_VERB_SET_CONFIG_DEFAULT_BYTES_0:
332 bytes = 4;
333 break;
334 default:
335 bytes = 1;
336 break;
337 }
338
339 for (i = 0; i < bytes; i++) {
340 reg &= ~0xfffff;
341 reg |= (verb + i) << 8 | ((val >> (8 * i)) & 0xff);
342 err = snd_hdac_exec_verb(codec, reg, 0, NULL);
343 if (err < 0)
344 goto out;
345 }
346
347 out:
348 codec_pm_unlock(codec, pm_lock);
349 return err;
350}
351
352static const struct regmap_config hda_regmap_cfg = {
353 .name = "hdaudio",
354 .reg_bits = 32,
355 .val_bits = 32,
356 .max_register = 0xfffffff,
357 .writeable_reg = hda_writeable_reg,
358 .readable_reg = hda_readable_reg,
359 .volatile_reg = hda_volatile_reg,
360 .cache_type = REGCACHE_RBTREE,
361 .reg_read = hda_reg_read,
362 .reg_write = hda_reg_write,
363 .use_single_read = true,
364 .use_single_write = true,
365};
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373int snd_hdac_regmap_init(struct hdac_device *codec)
374{
375 struct regmap *regmap;
376
377 regmap = regmap_init(&codec->dev, NULL, codec, &hda_regmap_cfg);
378 if (IS_ERR(regmap))
379 return PTR_ERR(regmap);
380 codec->regmap = regmap;
381 snd_array_init(&codec->vendor_verbs, sizeof(unsigned int), 8);
382 return 0;
383}
384EXPORT_SYMBOL_GPL(snd_hdac_regmap_init);
385
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389
390void snd_hdac_regmap_exit(struct hdac_device *codec)
391{
392 if (codec->regmap) {
393 regmap_exit(codec->regmap);
394 codec->regmap = NULL;
395 snd_array_free(&codec->vendor_verbs);
396 }
397}
398EXPORT_SYMBOL_GPL(snd_hdac_regmap_exit);
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407int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec,
408 unsigned int verb)
409{
410 unsigned int *p = snd_array_new(&codec->vendor_verbs);
411
412 if (!p)
413 return -ENOMEM;
414 *p = verb | 0x800;
415 return 0;
416}
417EXPORT_SYMBOL_GPL(snd_hdac_regmap_add_vendor_verb);
418
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423
424static int reg_raw_write(struct hdac_device *codec, unsigned int reg,
425 unsigned int val)
426{
427 if (!codec->regmap)
428 return hda_reg_write(codec, reg, val);
429 else
430 return regmap_write(codec->regmap, reg, val);
431}
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441int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
442 unsigned int val)
443{
444 int err;
445
446 err = reg_raw_write(codec, reg, val);
447 if (err == -EAGAIN) {
448 err = snd_hdac_power_up_pm(codec);
449 if (err >= 0)
450 err = reg_raw_write(codec, reg, val);
451 snd_hdac_power_down_pm(codec);
452 }
453 return err;
454}
455EXPORT_SYMBOL_GPL(snd_hdac_regmap_write_raw);
456
457static int reg_raw_read(struct hdac_device *codec, unsigned int reg,
458 unsigned int *val, bool uncached)
459{
460 if (uncached || !codec->regmap)
461 return hda_reg_read(codec, reg, val);
462 else
463 return regmap_read(codec->regmap, reg, val);
464}
465
466static int __snd_hdac_regmap_read_raw(struct hdac_device *codec,
467 unsigned int reg, unsigned int *val,
468 bool uncached)
469{
470 int err;
471
472 err = reg_raw_read(codec, reg, val, uncached);
473 if (err == -EAGAIN) {
474 err = snd_hdac_power_up_pm(codec);
475 if (err >= 0)
476 err = reg_raw_read(codec, reg, val, uncached);
477 snd_hdac_power_down_pm(codec);
478 }
479 return err;
480}
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490int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
491 unsigned int *val)
492{
493 return __snd_hdac_regmap_read_raw(codec, reg, val, false);
494}
495EXPORT_SYMBOL_GPL(snd_hdac_regmap_read_raw);
496
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499
500int snd_hdac_regmap_read_raw_uncached(struct hdac_device *codec,
501 unsigned int reg, unsigned int *val)
502{
503 return __snd_hdac_regmap_read_raw(codec, reg, val, true);
504}
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515int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg,
516 unsigned int mask, unsigned int val)
517{
518 unsigned int orig;
519 int err;
520
521 val &= mask;
522 err = snd_hdac_regmap_read_raw(codec, reg, &orig);
523 if (err < 0)
524 return err;
525 val |= orig & ~mask;
526 if (val == orig)
527 return 0;
528 err = snd_hdac_regmap_write_raw(codec, reg, val);
529 if (err < 0)
530 return err;
531 return 1;
532}
533EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw);
534