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1/*
2 * Regmap support for HD-audio verbs
3 *
4 * A virtual register is translated to one or more hda verbs for write,
5 * vice versa for read.
6 *
7 * A few limitations:
8 * - Provided for not all verbs but only subset standard non-volatile verbs.
9 * - For reading, only AC_VERB_GET_* variants can be used.
10 * - For writing, mapped to the *corresponding* AC_VERB_SET_* variants,
11 * so can't handle asymmetric verbs for read and write
12 */
13
14#include <linux/slab.h>
15#include <linux/device.h>
16#include <linux/regmap.h>
17#include <linux/export.h>
18#include <linux/pm.h>
19#include <linux/pm_runtime.h>
20#include <sound/core.h>
21#include <sound/hdaudio.h>
22#include <sound/hda_regmap.h>
23
24static int codec_pm_lock(struct hdac_device *codec)
25{
26 return snd_hdac_keep_power_up(codec);
27}
28
29static void codec_pm_unlock(struct hdac_device *codec, int lock)
30{
31 if (lock == 1)
32 snd_hdac_power_down_pm(codec);
33}
34
35#define get_verb(reg) (((reg) >> 8) & 0xfff)
36
37static bool hda_volatile_reg(struct device *dev, unsigned int reg)
38{
39 struct hdac_device *codec = dev_to_hdac_dev(dev);
40 unsigned int verb = get_verb(reg);
41
42 switch (verb) {
43 case AC_VERB_GET_PROC_COEF:
44 return !codec->cache_coef;
45 case AC_VERB_GET_COEF_INDEX:
46 case AC_VERB_GET_PROC_STATE:
47 case AC_VERB_GET_POWER_STATE:
48 case AC_VERB_GET_PIN_SENSE:
49 case AC_VERB_GET_HDMI_DIP_SIZE:
50 case AC_VERB_GET_HDMI_ELDD:
51 case AC_VERB_GET_HDMI_DIP_INDEX:
52 case AC_VERB_GET_HDMI_DIP_DATA:
53 case AC_VERB_GET_HDMI_DIP_XMIT:
54 case AC_VERB_GET_HDMI_CP_CTRL:
55 case AC_VERB_GET_HDMI_CHAN_SLOT:
56 case AC_VERB_GET_DEVICE_SEL:
57 case AC_VERB_GET_DEVICE_LIST: /* read-only volatile */
58 return true;
59 }
60
61 return false;
62}
63
64static bool hda_writeable_reg(struct device *dev, unsigned int reg)
65{
66 struct hdac_device *codec = dev_to_hdac_dev(dev);
67 unsigned int verb = get_verb(reg);
68 int i;
69
70 for (i = 0; i < codec->vendor_verbs.used; i++) {
71 unsigned int *v = snd_array_elem(&codec->vendor_verbs, i);
72 if (verb == *v)
73 return true;
74 }
75
76 if (codec->caps_overwriting)
77 return true;
78
79 switch (verb & 0xf00) {
80 case AC_VERB_GET_STREAM_FORMAT:
81 case AC_VERB_GET_AMP_GAIN_MUTE:
82 return true;
83 case AC_VERB_GET_PROC_COEF:
84 return codec->cache_coef;
85 case 0xf00:
86 break;
87 default:
88 return false;
89 }
90
91 switch (verb) {
92 case AC_VERB_GET_CONNECT_SEL:
93 case AC_VERB_GET_SDI_SELECT:
94 case AC_VERB_GET_PIN_WIDGET_CONTROL:
95 case AC_VERB_GET_UNSOLICITED_RESPONSE: /* only as SET_UNSOLICITED_ENABLE */
96 case AC_VERB_GET_BEEP_CONTROL:
97 case AC_VERB_GET_EAPD_BTLENABLE:
98 case AC_VERB_GET_DIGI_CONVERT_1:
99 case AC_VERB_GET_DIGI_CONVERT_2: /* only for beep control */
100 case AC_VERB_GET_VOLUME_KNOB_CONTROL:
101 case AC_VERB_GET_GPIO_MASK:
102 case AC_VERB_GET_GPIO_DIRECTION:
103 case AC_VERB_GET_GPIO_DATA: /* not for volatile read */
104 case AC_VERB_GET_GPIO_WAKE_MASK:
105 case AC_VERB_GET_GPIO_UNSOLICITED_RSP_MASK:
106 case AC_VERB_GET_GPIO_STICKY_MASK:
107 return true;
108 }
109
110 return false;
111}
112
113static bool hda_readable_reg(struct device *dev, unsigned int reg)
114{
115 struct hdac_device *codec = dev_to_hdac_dev(dev);
116 unsigned int verb = get_verb(reg);
117
118 if (codec->caps_overwriting)
119 return true;
120
121 switch (verb) {
122 case AC_VERB_PARAMETERS:
123 case AC_VERB_GET_CONNECT_LIST:
124 case AC_VERB_GET_SUBSYSTEM_ID:
125 return true;
126 /* below are basically writable, but disabled for reducing unnecessary
127 * writes at sync
128 */
129 case AC_VERB_GET_CONFIG_DEFAULT: /* usually just read */
130 case AC_VERB_GET_CONV: /* managed in PCM code */
131 case AC_VERB_GET_CVT_CHAN_COUNT: /* managed in HDMI CA code */
132 return true;
133 }
134
135 return hda_writeable_reg(dev, reg);
136}
137
138/*
139 * Stereo amp pseudo register:
140 * for making easier to handle the stereo volume control, we provide a
141 * fake register to deal both left and right channels by a single
142 * (pseudo) register access. A verb consisting of SET_AMP_GAIN with
143 * *both* SET_LEFT and SET_RIGHT bits takes a 16bit value, the lower 8bit
144 * for the left and the upper 8bit for the right channel.
145 */
146static bool is_stereo_amp_verb(unsigned int reg)
147{
148 if (((reg >> 8) & 0x700) != AC_VERB_SET_AMP_GAIN_MUTE)
149 return false;
150 return (reg & (AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT)) ==
151 (AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT);
152}
153
154/* read a pseudo stereo amp register (16bit left+right) */
155static int hda_reg_read_stereo_amp(struct hdac_device *codec,
156 unsigned int reg, unsigned int *val)
157{
158 unsigned int left, right;
159 int err;
160
161 reg &= ~(AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT);
162 err = snd_hdac_exec_verb(codec, reg | AC_AMP_GET_LEFT, 0, &left);
163 if (err < 0)
164 return err;
165 err = snd_hdac_exec_verb(codec, reg | AC_AMP_GET_RIGHT, 0, &right);
166 if (err < 0)
167 return err;
168 *val = left | (right << 8);
169 return 0;
170}
171
172/* write a pseudo stereo amp register (16bit left+right) */
173static int hda_reg_write_stereo_amp(struct hdac_device *codec,
174 unsigned int reg, unsigned int val)
175{
176 int err;
177 unsigned int verb, left, right;
178
179 verb = AC_VERB_SET_AMP_GAIN_MUTE << 8;
180 if (reg & AC_AMP_GET_OUTPUT)
181 verb |= AC_AMP_SET_OUTPUT;
182 else
183 verb |= AC_AMP_SET_INPUT | ((reg & 0xf) << 8);
184 reg = (reg & ~0xfffff) | verb;
185
186 left = val & 0xff;
187 right = (val >> 8) & 0xff;
188 if (left == right) {
189 reg |= AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT;
190 return snd_hdac_exec_verb(codec, reg | left, 0, NULL);
191 }
192
193 err = snd_hdac_exec_verb(codec, reg | AC_AMP_SET_LEFT | left, 0, NULL);
194 if (err < 0)
195 return err;
196 err = snd_hdac_exec_verb(codec, reg | AC_AMP_SET_RIGHT | right, 0, NULL);
197 if (err < 0)
198 return err;
199 return 0;
200}
201
202/* read a pseudo coef register (16bit) */
203static int hda_reg_read_coef(struct hdac_device *codec, unsigned int reg,
204 unsigned int *val)
205{
206 unsigned int verb;
207 int err;
208
209 if (!codec->cache_coef)
210 return -EINVAL;
211 /* LSB 8bit = coef index */
212 verb = (reg & ~0xfff00) | (AC_VERB_SET_COEF_INDEX << 8);
213 err = snd_hdac_exec_verb(codec, verb, 0, NULL);
214 if (err < 0)
215 return err;
216 verb = (reg & ~0xfffff) | (AC_VERB_GET_COEF_INDEX << 8);
217 return snd_hdac_exec_verb(codec, verb, 0, val);
218}
219
220/* write a pseudo coef register (16bit) */
221static int hda_reg_write_coef(struct hdac_device *codec, unsigned int reg,
222 unsigned int val)
223{
224 unsigned int verb;
225 int err;
226
227 if (!codec->cache_coef)
228 return -EINVAL;
229 /* LSB 8bit = coef index */
230 verb = (reg & ~0xfff00) | (AC_VERB_SET_COEF_INDEX << 8);
231 err = snd_hdac_exec_verb(codec, verb, 0, NULL);
232 if (err < 0)
233 return err;
234 verb = (reg & ~0xfffff) | (AC_VERB_GET_COEF_INDEX << 8) |
235 (val & 0xffff);
236 return snd_hdac_exec_verb(codec, verb, 0, NULL);
237}
238
239static int hda_reg_read(void *context, unsigned int reg, unsigned int *val)
240{
241 struct hdac_device *codec = context;
242 int verb = get_verb(reg);
243 int err;
244 int pm_lock = 0;
245
246 if (verb != AC_VERB_GET_POWER_STATE) {
247 pm_lock = codec_pm_lock(codec);
248 if (pm_lock < 0)
249 return -EAGAIN;
250 }
251 reg |= (codec->addr << 28);
252 if (is_stereo_amp_verb(reg)) {
253 err = hda_reg_read_stereo_amp(codec, reg, val);
254 goto out;
255 }
256 if (verb == AC_VERB_GET_PROC_COEF) {
257 err = hda_reg_read_coef(codec, reg, val);
258 goto out;
259 }
260 if ((verb & 0x700) == AC_VERB_SET_AMP_GAIN_MUTE)
261 reg &= ~AC_AMP_FAKE_MUTE;
262
263 err = snd_hdac_exec_verb(codec, reg, 0, val);
264 if (err < 0)
265 goto out;
266 /* special handling for asymmetric reads */
267 if (verb == AC_VERB_GET_POWER_STATE) {
268 if (*val & AC_PWRST_ERROR)
269 *val = -1;
270 else /* take only the actual state */
271 *val = (*val >> 4) & 0x0f;
272 }
273 out:
274 codec_pm_unlock(codec, pm_lock);
275 return err;
276}
277
278static int hda_reg_write(void *context, unsigned int reg, unsigned int val)
279{
280 struct hdac_device *codec = context;
281 unsigned int verb;
282 int i, bytes, err;
283 int pm_lock = 0;
284
285 if (codec->caps_overwriting)
286 return 0;
287
288 reg &= ~0x00080000U; /* drop GET bit */
289 reg |= (codec->addr << 28);
290 verb = get_verb(reg);
291
292 if (verb != AC_VERB_SET_POWER_STATE) {
293 pm_lock = codec_pm_lock(codec);
294 if (pm_lock < 0)
295 return codec->lazy_cache ? 0 : -EAGAIN;
296 }
297
298 if (is_stereo_amp_verb(reg)) {
299 err = hda_reg_write_stereo_amp(codec, reg, val);
300 goto out;
301 }
302
303 if (verb == AC_VERB_SET_PROC_COEF) {
304 err = hda_reg_write_coef(codec, reg, val);
305 goto out;
306 }
307
308 switch (verb & 0xf00) {
309 case AC_VERB_SET_AMP_GAIN_MUTE:
310 if ((reg & AC_AMP_FAKE_MUTE) && (val & AC_AMP_MUTE))
311 val = 0;
312 verb = AC_VERB_SET_AMP_GAIN_MUTE;
313 if (reg & AC_AMP_GET_LEFT)
314 verb |= AC_AMP_SET_LEFT >> 8;
315 else
316 verb |= AC_AMP_SET_RIGHT >> 8;
317 if (reg & AC_AMP_GET_OUTPUT) {
318 verb |= AC_AMP_SET_OUTPUT >> 8;
319 } else {
320 verb |= AC_AMP_SET_INPUT >> 8;
321 verb |= reg & 0xf;
322 }
323 break;
324 }
325
326 switch (verb) {
327 case AC_VERB_SET_DIGI_CONVERT_1:
328 bytes = 2;
329 break;
330 case AC_VERB_SET_CONFIG_DEFAULT_BYTES_0:
331 bytes = 4;
332 break;
333 default:
334 bytes = 1;
335 break;
336 }
337
338 for (i = 0; i < bytes; i++) {
339 reg &= ~0xfffff;
340 reg |= (verb + i) << 8 | ((val >> (8 * i)) & 0xff);
341 err = snd_hdac_exec_verb(codec, reg, 0, NULL);
342 if (err < 0)
343 goto out;
344 }
345
346 out:
347 codec_pm_unlock(codec, pm_lock);
348 return err;
349}
350
351static const struct regmap_config hda_regmap_cfg = {
352 .name = "hdaudio",
353 .reg_bits = 32,
354 .val_bits = 32,
355 .max_register = 0xfffffff,
356 .writeable_reg = hda_writeable_reg,
357 .readable_reg = hda_readable_reg,
358 .volatile_reg = hda_volatile_reg,
359 .cache_type = REGCACHE_RBTREE,
360 .reg_read = hda_reg_read,
361 .reg_write = hda_reg_write,
362 .use_single_rw = true,
363};
364
365/**
366 * snd_hdac_regmap_init - Initialize regmap for HDA register accesses
367 * @codec: the codec object
368 *
369 * Returns zero for success or a negative error code.
370 */
371int snd_hdac_regmap_init(struct hdac_device *codec)
372{
373 struct regmap *regmap;
374
375 regmap = regmap_init(&codec->dev, NULL, codec, &hda_regmap_cfg);
376 if (IS_ERR(regmap))
377 return PTR_ERR(regmap);
378 codec->regmap = regmap;
379 snd_array_init(&codec->vendor_verbs, sizeof(unsigned int), 8);
380 return 0;
381}
382EXPORT_SYMBOL_GPL(snd_hdac_regmap_init);
383
384/**
385 * snd_hdac_regmap_init - Release the regmap from HDA codec
386 * @codec: the codec object
387 */
388void snd_hdac_regmap_exit(struct hdac_device *codec)
389{
390 if (codec->regmap) {
391 regmap_exit(codec->regmap);
392 codec->regmap = NULL;
393 snd_array_free(&codec->vendor_verbs);
394 }
395}
396EXPORT_SYMBOL_GPL(snd_hdac_regmap_exit);
397
398/**
399 * snd_hdac_regmap_add_vendor_verb - add a vendor-specific verb to regmap
400 * @codec: the codec object
401 * @verb: verb to allow accessing via regmap
402 *
403 * Returns zero for success or a negative error code.
404 */
405int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec,
406 unsigned int verb)
407{
408 unsigned int *p = snd_array_new(&codec->vendor_verbs);
409
410 if (!p)
411 return -ENOMEM;
412 *p = verb | 0x800; /* set GET bit */
413 return 0;
414}
415EXPORT_SYMBOL_GPL(snd_hdac_regmap_add_vendor_verb);
416
417/*
418 * helper functions
419 */
420
421/* write a pseudo-register value (w/o power sequence) */
422static int reg_raw_write(struct hdac_device *codec, unsigned int reg,
423 unsigned int val)
424{
425 if (!codec->regmap)
426 return hda_reg_write(codec, reg, val);
427 else
428 return regmap_write(codec->regmap, reg, val);
429}
430
431/**
432 * snd_hdac_regmap_write_raw - write a pseudo register with power mgmt
433 * @codec: the codec object
434 * @reg: pseudo register
435 * @val: value to write
436 *
437 * Returns zero if successful or a negative error code.
438 */
439int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
440 unsigned int val)
441{
442 int err;
443
444 err = reg_raw_write(codec, reg, val);
445 if (err == -EAGAIN) {
446 err = snd_hdac_power_up_pm(codec);
447 if (err >= 0)
448 err = reg_raw_write(codec, reg, val);
449 snd_hdac_power_down_pm(codec);
450 }
451 return err;
452}
453EXPORT_SYMBOL_GPL(snd_hdac_regmap_write_raw);
454
455static int reg_raw_read(struct hdac_device *codec, unsigned int reg,
456 unsigned int *val, bool uncached)
457{
458 if (uncached || !codec->regmap)
459 return hda_reg_read(codec, reg, val);
460 else
461 return regmap_read(codec->regmap, reg, val);
462}
463
464static int __snd_hdac_regmap_read_raw(struct hdac_device *codec,
465 unsigned int reg, unsigned int *val,
466 bool uncached)
467{
468 int err;
469
470 err = reg_raw_read(codec, reg, val, uncached);
471 if (err == -EAGAIN) {
472 err = snd_hdac_power_up_pm(codec);
473 if (err >= 0)
474 err = reg_raw_read(codec, reg, val, uncached);
475 snd_hdac_power_down_pm(codec);
476 }
477 return err;
478}
479
480/**
481 * snd_hdac_regmap_read_raw - read a pseudo register with power mgmt
482 * @codec: the codec object
483 * @reg: pseudo register
484 * @val: pointer to store the read value
485 *
486 * Returns zero if successful or a negative error code.
487 */
488int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
489 unsigned int *val)
490{
491 return __snd_hdac_regmap_read_raw(codec, reg, val, false);
492}
493EXPORT_SYMBOL_GPL(snd_hdac_regmap_read_raw);
494
495/* Works like snd_hdac_regmap_read_raw(), but this doesn't read from the
496 * cache but always via hda verbs.
497 */
498int snd_hdac_regmap_read_raw_uncached(struct hdac_device *codec,
499 unsigned int reg, unsigned int *val)
500{
501 return __snd_hdac_regmap_read_raw(codec, reg, val, true);
502}
503
504/**
505 * snd_hdac_regmap_update_raw - update a pseudo register with power mgmt
506 * @codec: the codec object
507 * @reg: pseudo register
508 * @mask: bit mask to udpate
509 * @val: value to update
510 *
511 * Returns zero if successful or a negative error code.
512 */
513int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg,
514 unsigned int mask, unsigned int val)
515{
516 unsigned int orig;
517 int err;
518
519 val &= mask;
520 err = snd_hdac_regmap_read_raw(codec, reg, &orig);
521 if (err < 0)
522 return err;
523 val |= orig & ~mask;
524 if (val == orig)
525 return 0;
526 err = snd_hdac_regmap_write_raw(codec, reg, val);
527 if (err < 0)
528 return err;
529 return 1;
530}
531EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw);
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Regmap support for HD-audio verbs
4 *
5 * A virtual register is translated to one or more hda verbs for write,
6 * vice versa for read.
7 *
8 * A few limitations:
9 * - Provided for not all verbs but only subset standard non-volatile verbs.
10 * - For reading, only AC_VERB_GET_* variants can be used.
11 * - For writing, mapped to the *corresponding* AC_VERB_SET_* variants,
12 * so can't handle asymmetric verbs for read and write
13 */
14
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 <sound/core.h>
21#include <sound/hdaudio.h>
22#include <sound/hda_regmap.h>
23#include "local.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: /* read-only volatile */
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: /* only as SET_UNSOLICITED_ENABLE */
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: /* only for beep control */
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: /* not for volatile read */
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 /* below are basically writable, but disabled for reducing unnecessary
128 * writes at sync
129 */
130 case AC_VERB_GET_CONFIG_DEFAULT: /* usually just read */
131 case AC_VERB_GET_CONV: /* managed in PCM code */
132 case AC_VERB_GET_CVT_CHAN_COUNT: /* managed in HDMI CA code */
133 return true;
134 }
135
136 return hda_writeable_reg(dev, reg);
137}
138
139/*
140 * Stereo amp pseudo register:
141 * for making easier to handle the stereo volume control, we provide a
142 * fake register to deal both left and right channels by a single
143 * (pseudo) register access. A verb consisting of SET_AMP_GAIN with
144 * *both* SET_LEFT and SET_RIGHT bits takes a 16bit value, the lower 8bit
145 * for the left and the upper 8bit for the right channel.
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/* read a pseudo stereo amp register (16bit left+right) */
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/* write a pseudo stereo amp register (16bit left+right) */
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/* read a pseudo coef register (16bit) */
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 /* LSB 8bit = coef index */
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/* write a pseudo coef register (16bit) */
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 /* LSB 8bit = coef index */
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 /* special handling for asymmetric reads */
268 if (verb == AC_VERB_GET_POWER_STATE) {
269 if (*val & AC_PWRST_ERROR)
270 *val = -1;
271 else /* take only the actual state */
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; /* drop GET bit */
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_MAPLE,
361 .reg_read = hda_reg_read,
362 .reg_write = hda_reg_write,
363 .use_single_read = true,
364 .use_single_write = true,
365 .disable_locking = true,
366};
367
368/**
369 * snd_hdac_regmap_init - Initialize regmap for HDA register accesses
370 * @codec: the codec object
371 *
372 * Returns zero for success or a negative error code.
373 */
374int snd_hdac_regmap_init(struct hdac_device *codec)
375{
376 struct regmap *regmap;
377
378 regmap = regmap_init(&codec->dev, NULL, codec, &hda_regmap_cfg);
379 if (IS_ERR(regmap))
380 return PTR_ERR(regmap);
381 codec->regmap = regmap;
382 snd_array_init(&codec->vendor_verbs, sizeof(unsigned int), 8);
383 return 0;
384}
385EXPORT_SYMBOL_GPL(snd_hdac_regmap_init);
386
387/**
388 * snd_hdac_regmap_exit - Release the regmap from HDA codec
389 * @codec: the codec object
390 */
391void snd_hdac_regmap_exit(struct hdac_device *codec)
392{
393 if (codec->regmap) {
394 regmap_exit(codec->regmap);
395 codec->regmap = NULL;
396 snd_array_free(&codec->vendor_verbs);
397 }
398}
399EXPORT_SYMBOL_GPL(snd_hdac_regmap_exit);
400
401/**
402 * snd_hdac_regmap_add_vendor_verb - add a vendor-specific verb to regmap
403 * @codec: the codec object
404 * @verb: verb to allow accessing via regmap
405 *
406 * Returns zero for success or a negative error code.
407 */
408int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec,
409 unsigned int verb)
410{
411 unsigned int *p = snd_array_new(&codec->vendor_verbs);
412
413 if (!p)
414 return -ENOMEM;
415 *p = verb | 0x800; /* set GET bit */
416 return 0;
417}
418EXPORT_SYMBOL_GPL(snd_hdac_regmap_add_vendor_verb);
419
420/*
421 * helper functions
422 */
423
424/* write a pseudo-register value (w/o power sequence) */
425static int reg_raw_write(struct hdac_device *codec, unsigned int reg,
426 unsigned int val)
427{
428 int err;
429
430 mutex_lock(&codec->regmap_lock);
431 if (!codec->regmap)
432 err = hda_reg_write(codec, reg, val);
433 else
434 err = regmap_write(codec->regmap, reg, val);
435 mutex_unlock(&codec->regmap_lock);
436 return err;
437}
438
439/* a helper macro to call @func_call; retry with power-up if failed */
440#define CALL_RAW_FUNC(codec, func_call) \
441 ({ \
442 int _err = func_call; \
443 if (_err == -EAGAIN) { \
444 _err = snd_hdac_power_up_pm(codec); \
445 if (_err >= 0) \
446 _err = func_call; \
447 snd_hdac_power_down_pm(codec); \
448 } \
449 _err;})
450
451/**
452 * snd_hdac_regmap_write_raw - write a pseudo register with power mgmt
453 * @codec: the codec object
454 * @reg: pseudo register
455 * @val: value to write
456 *
457 * Returns zero if successful or a negative error code.
458 */
459int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
460 unsigned int val)
461{
462 return CALL_RAW_FUNC(codec, reg_raw_write(codec, reg, val));
463}
464EXPORT_SYMBOL_GPL(snd_hdac_regmap_write_raw);
465
466static int reg_raw_read(struct hdac_device *codec, unsigned int reg,
467 unsigned int *val, bool uncached)
468{
469 int err;
470
471 mutex_lock(&codec->regmap_lock);
472 if (uncached || !codec->regmap)
473 err = hda_reg_read(codec, reg, val);
474 else
475 err = regmap_read(codec->regmap, reg, val);
476 mutex_unlock(&codec->regmap_lock);
477 return err;
478}
479
480static int __snd_hdac_regmap_read_raw(struct hdac_device *codec,
481 unsigned int reg, unsigned int *val,
482 bool uncached)
483{
484 return CALL_RAW_FUNC(codec, reg_raw_read(codec, reg, val, uncached));
485}
486
487/**
488 * snd_hdac_regmap_read_raw - read a pseudo register with power mgmt
489 * @codec: the codec object
490 * @reg: pseudo register
491 * @val: pointer to store the read value
492 *
493 * Returns zero if successful or a negative error code.
494 */
495int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
496 unsigned int *val)
497{
498 return __snd_hdac_regmap_read_raw(codec, reg, val, false);
499}
500EXPORT_SYMBOL_GPL(snd_hdac_regmap_read_raw);
501
502/* Works like snd_hdac_regmap_read_raw(), but this doesn't read from the
503 * cache but always via hda verbs.
504 */
505int snd_hdac_regmap_read_raw_uncached(struct hdac_device *codec,
506 unsigned int reg, unsigned int *val)
507{
508 return __snd_hdac_regmap_read_raw(codec, reg, val, true);
509}
510
511static int reg_raw_update(struct hdac_device *codec, unsigned int reg,
512 unsigned int mask, unsigned int val)
513{
514 unsigned int orig;
515 bool change;
516 int err;
517
518 mutex_lock(&codec->regmap_lock);
519 if (codec->regmap) {
520 err = regmap_update_bits_check(codec->regmap, reg, mask, val,
521 &change);
522 if (!err)
523 err = change ? 1 : 0;
524 } else {
525 err = hda_reg_read(codec, reg, &orig);
526 if (!err) {
527 val &= mask;
528 val |= orig & ~mask;
529 if (val != orig) {
530 err = hda_reg_write(codec, reg, val);
531 if (!err)
532 err = 1;
533 }
534 }
535 }
536 mutex_unlock(&codec->regmap_lock);
537 return err;
538}
539
540/**
541 * snd_hdac_regmap_update_raw - update a pseudo register with power mgmt
542 * @codec: the codec object
543 * @reg: pseudo register
544 * @mask: bit mask to update
545 * @val: value to update
546 *
547 * Returns zero if successful or a negative error code.
548 */
549int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg,
550 unsigned int mask, unsigned int val)
551{
552 return CALL_RAW_FUNC(codec, reg_raw_update(codec, reg, mask, val));
553}
554EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw);
555
556static int reg_raw_update_once(struct hdac_device *codec, unsigned int reg,
557 unsigned int mask, unsigned int val)
558{
559 int err = 0;
560
561 if (!codec->regmap)
562 return reg_raw_update(codec, reg, mask, val);
563
564 mutex_lock(&codec->regmap_lock);
565 /* Discard any updates to already initialised registers. */
566 if (!regcache_reg_cached(codec->regmap, reg))
567 err = regmap_update_bits(codec->regmap, reg, mask, val);
568 mutex_unlock(&codec->regmap_lock);
569 return err;
570}
571
572/**
573 * snd_hdac_regmap_update_raw_once - initialize the register value only once
574 * @codec: the codec object
575 * @reg: pseudo register
576 * @mask: bit mask to update
577 * @val: value to update
578 *
579 * Performs the update of the register bits only once when the register
580 * hasn't been initialized yet. Used in HD-audio legacy driver.
581 * Returns zero if successful or a negative error code
582 */
583int snd_hdac_regmap_update_raw_once(struct hdac_device *codec, unsigned int reg,
584 unsigned int mask, unsigned int val)
585{
586 return CALL_RAW_FUNC(codec, reg_raw_update_once(codec, reg, mask, val));
587}
588EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw_once);
589
590/**
591 * snd_hdac_regmap_sync - sync out the cached values for PM resume
592 * @codec: the codec object
593 */
594void snd_hdac_regmap_sync(struct hdac_device *codec)
595{
596 mutex_lock(&codec->regmap_lock);
597 if (codec->regmap)
598 regcache_sync(codec->regmap);
599 mutex_unlock(&codec->regmap_lock);
600}
601EXPORT_SYMBOL_GPL(snd_hdac_regmap_sync);