Commit | Line | Data |
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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
4d75faa0 TI |
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 <linux/pm_runtime.h> | |
21 | #include <sound/core.h> | |
22 | #include <sound/hdaudio.h> | |
23 | #include <sound/hda_regmap.h> | |
ddf7cb83 | 24 | #include "local.h" |
4d75faa0 | 25 | |
fc4f000b TI |
26 | static int codec_pm_lock(struct hdac_device *codec) |
27 | { | |
28 | return snd_hdac_keep_power_up(codec); | |
29 | } | |
30 | ||
31 | static void codec_pm_unlock(struct hdac_device *codec, int lock) | |
32 | { | |
33 | if (lock == 1) | |
34 | snd_hdac_power_down_pm(codec); | |
35 | } | |
4d75faa0 TI |
36 | |
37 | #define get_verb(reg) (((reg) >> 8) & 0xfff) | |
38 | ||
39 | static bool hda_volatile_reg(struct device *dev, unsigned int reg) | |
40 | { | |
40ba66a7 | 41 | struct hdac_device *codec = dev_to_hdac_dev(dev); |
4d75faa0 TI |
42 | unsigned int verb = get_verb(reg); |
43 | ||
44 | switch (verb) { | |
45 | case AC_VERB_GET_PROC_COEF: | |
40ba66a7 | 46 | return !codec->cache_coef; |
4d75faa0 TI |
47 | case AC_VERB_GET_COEF_INDEX: |
48 | case AC_VERB_GET_PROC_STATE: | |
49 | case AC_VERB_GET_POWER_STATE: | |
50 | case AC_VERB_GET_PIN_SENSE: | |
51 | case AC_VERB_GET_HDMI_DIP_SIZE: | |
52 | case AC_VERB_GET_HDMI_ELDD: | |
53 | case AC_VERB_GET_HDMI_DIP_INDEX: | |
54 | case AC_VERB_GET_HDMI_DIP_DATA: | |
55 | case AC_VERB_GET_HDMI_DIP_XMIT: | |
56 | case AC_VERB_GET_HDMI_CP_CTRL: | |
57 | case AC_VERB_GET_HDMI_CHAN_SLOT: | |
58 | case AC_VERB_GET_DEVICE_SEL: | |
59 | case AC_VERB_GET_DEVICE_LIST: /* read-only volatile */ | |
60 | return true; | |
61 | } | |
62 | ||
63 | return false; | |
64 | } | |
65 | ||
66 | static bool hda_writeable_reg(struct device *dev, unsigned int reg) | |
67 | { | |
faa75f8a | 68 | struct hdac_device *codec = dev_to_hdac_dev(dev); |
4d75faa0 | 69 | unsigned int verb = get_verb(reg); |
a9c2dfc8 | 70 | const unsigned int *v; |
5e56bcea TI |
71 | int i; |
72 | ||
a9c2dfc8 | 73 | snd_array_for_each(&codec->vendor_verbs, i, v) { |
5e56bcea TI |
74 | if (verb == *v) |
75 | return true; | |
76 | } | |
4d75faa0 | 77 | |
faa75f8a TI |
78 | if (codec->caps_overwriting) |
79 | return true; | |
80 | ||
4d75faa0 TI |
81 | switch (verb & 0xf00) { |
82 | case AC_VERB_GET_STREAM_FORMAT: | |
83 | case AC_VERB_GET_AMP_GAIN_MUTE: | |
84 | return true; | |
40ba66a7 TI |
85 | case AC_VERB_GET_PROC_COEF: |
86 | return codec->cache_coef; | |
4d75faa0 TI |
87 | case 0xf00: |
88 | break; | |
89 | default: | |
90 | return false; | |
91 | } | |
92 | ||
93 | switch (verb) { | |
94 | case AC_VERB_GET_CONNECT_SEL: | |
95 | case AC_VERB_GET_SDI_SELECT: | |
4d75faa0 TI |
96 | case AC_VERB_GET_PIN_WIDGET_CONTROL: |
97 | case AC_VERB_GET_UNSOLICITED_RESPONSE: /* only as SET_UNSOLICITED_ENABLE */ | |
98 | case AC_VERB_GET_BEEP_CONTROL: | |
99 | case AC_VERB_GET_EAPD_BTLENABLE: | |
100 | case AC_VERB_GET_DIGI_CONVERT_1: | |
101 | case AC_VERB_GET_DIGI_CONVERT_2: /* only for beep control */ | |
102 | case AC_VERB_GET_VOLUME_KNOB_CONTROL: | |
4d75faa0 TI |
103 | case AC_VERB_GET_GPIO_MASK: |
104 | case AC_VERB_GET_GPIO_DIRECTION: | |
105 | case AC_VERB_GET_GPIO_DATA: /* not for volatile read */ | |
106 | case AC_VERB_GET_GPIO_WAKE_MASK: | |
107 | case AC_VERB_GET_GPIO_UNSOLICITED_RSP_MASK: | |
108 | case AC_VERB_GET_GPIO_STICKY_MASK: | |
4d75faa0 TI |
109 | return true; |
110 | } | |
111 | ||
112 | return false; | |
113 | } | |
114 | ||
115 | static bool hda_readable_reg(struct device *dev, unsigned int reg) | |
116 | { | |
faa75f8a | 117 | struct hdac_device *codec = dev_to_hdac_dev(dev); |
4d75faa0 TI |
118 | unsigned int verb = get_verb(reg); |
119 | ||
faa75f8a TI |
120 | if (codec->caps_overwriting) |
121 | return true; | |
122 | ||
4d75faa0 TI |
123 | switch (verb) { |
124 | case AC_VERB_PARAMETERS: | |
125 | case AC_VERB_GET_CONNECT_LIST: | |
126 | case AC_VERB_GET_SUBSYSTEM_ID: | |
127 | return true; | |
8bc174e9 TI |
128 | /* below are basically writable, but disabled for reducing unnecessary |
129 | * writes at sync | |
130 | */ | |
131 | case AC_VERB_GET_CONFIG_DEFAULT: /* usually just read */ | |
132 | case AC_VERB_GET_CONV: /* managed in PCM code */ | |
133 | case AC_VERB_GET_CVT_CHAN_COUNT: /* managed in HDMI CA code */ | |
134 | return true; | |
4d75faa0 TI |
135 | } |
136 | ||
137 | return hda_writeable_reg(dev, reg); | |
138 | } | |
139 | ||
d313e0a8 TI |
140 | /* |
141 | * Stereo amp pseudo register: | |
142 | * for making easier to handle the stereo volume control, we provide a | |
143 | * fake register to deal both left and right channels by a single | |
144 | * (pseudo) register access. A verb consisting of SET_AMP_GAIN with | |
145 | * *both* SET_LEFT and SET_RIGHT bits takes a 16bit value, the lower 8bit | |
146 | * for the left and the upper 8bit for the right channel. | |
147 | */ | |
148 | static bool is_stereo_amp_verb(unsigned int reg) | |
149 | { | |
150 | if (((reg >> 8) & 0x700) != AC_VERB_SET_AMP_GAIN_MUTE) | |
151 | return false; | |
152 | return (reg & (AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT)) == | |
153 | (AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT); | |
154 | } | |
155 | ||
156 | /* read a pseudo stereo amp register (16bit left+right) */ | |
157 | static int hda_reg_read_stereo_amp(struct hdac_device *codec, | |
158 | unsigned int reg, unsigned int *val) | |
159 | { | |
160 | unsigned int left, right; | |
161 | int err; | |
162 | ||
163 | reg &= ~(AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT); | |
164 | err = snd_hdac_exec_verb(codec, reg | AC_AMP_GET_LEFT, 0, &left); | |
165 | if (err < 0) | |
166 | return err; | |
167 | err = snd_hdac_exec_verb(codec, reg | AC_AMP_GET_RIGHT, 0, &right); | |
168 | if (err < 0) | |
169 | return err; | |
170 | *val = left | (right << 8); | |
171 | return 0; | |
172 | } | |
173 | ||
174 | /* write a pseudo stereo amp register (16bit left+right) */ | |
175 | static int hda_reg_write_stereo_amp(struct hdac_device *codec, | |
176 | unsigned int reg, unsigned int val) | |
177 | { | |
178 | int err; | |
179 | unsigned int verb, left, right; | |
180 | ||
181 | verb = AC_VERB_SET_AMP_GAIN_MUTE << 8; | |
182 | if (reg & AC_AMP_GET_OUTPUT) | |
183 | verb |= AC_AMP_SET_OUTPUT; | |
184 | else | |
185 | verb |= AC_AMP_SET_INPUT | ((reg & 0xf) << 8); | |
186 | reg = (reg & ~0xfffff) | verb; | |
187 | ||
188 | left = val & 0xff; | |
189 | right = (val >> 8) & 0xff; | |
190 | if (left == right) { | |
191 | reg |= AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT; | |
192 | return snd_hdac_exec_verb(codec, reg | left, 0, NULL); | |
193 | } | |
194 | ||
195 | err = snd_hdac_exec_verb(codec, reg | AC_AMP_SET_LEFT | left, 0, NULL); | |
196 | if (err < 0) | |
197 | return err; | |
198 | err = snd_hdac_exec_verb(codec, reg | AC_AMP_SET_RIGHT | right, 0, NULL); | |
199 | if (err < 0) | |
200 | return err; | |
201 | return 0; | |
202 | } | |
203 | ||
40ba66a7 TI |
204 | /* read a pseudo coef register (16bit) */ |
205 | static int hda_reg_read_coef(struct hdac_device *codec, unsigned int reg, | |
206 | unsigned int *val) | |
207 | { | |
208 | unsigned int verb; | |
209 | int err; | |
210 | ||
211 | if (!codec->cache_coef) | |
212 | return -EINVAL; | |
213 | /* LSB 8bit = coef index */ | |
214 | verb = (reg & ~0xfff00) | (AC_VERB_SET_COEF_INDEX << 8); | |
215 | err = snd_hdac_exec_verb(codec, verb, 0, NULL); | |
216 | if (err < 0) | |
217 | return err; | |
218 | verb = (reg & ~0xfffff) | (AC_VERB_GET_COEF_INDEX << 8); | |
219 | return snd_hdac_exec_verb(codec, verb, 0, val); | |
220 | } | |
221 | ||
222 | /* write a pseudo coef register (16bit) */ | |
223 | static int hda_reg_write_coef(struct hdac_device *codec, unsigned int reg, | |
224 | unsigned int val) | |
225 | { | |
226 | unsigned int verb; | |
227 | int err; | |
228 | ||
229 | if (!codec->cache_coef) | |
230 | return -EINVAL; | |
231 | /* LSB 8bit = coef index */ | |
232 | verb = (reg & ~0xfff00) | (AC_VERB_SET_COEF_INDEX << 8); | |
233 | err = snd_hdac_exec_verb(codec, verb, 0, NULL); | |
234 | if (err < 0) | |
235 | return err; | |
236 | verb = (reg & ~0xfffff) | (AC_VERB_GET_COEF_INDEX << 8) | | |
237 | (val & 0xffff); | |
238 | return snd_hdac_exec_verb(codec, verb, 0, NULL); | |
239 | } | |
240 | ||
4d75faa0 TI |
241 | static int hda_reg_read(void *context, unsigned int reg, unsigned int *val) |
242 | { | |
243 | struct hdac_device *codec = context; | |
40ba66a7 | 244 | int verb = get_verb(reg); |
33f81940 | 245 | int err; |
fc4f000b | 246 | int pm_lock = 0; |
4d75faa0 | 247 | |
fc4f000b TI |
248 | if (verb != AC_VERB_GET_POWER_STATE) { |
249 | pm_lock = codec_pm_lock(codec); | |
250 | if (pm_lock < 0) | |
251 | return -EAGAIN; | |
252 | } | |
4d75faa0 | 253 | reg |= (codec->addr << 28); |
fc4f000b TI |
254 | if (is_stereo_amp_verb(reg)) { |
255 | err = hda_reg_read_stereo_amp(codec, reg, val); | |
256 | goto out; | |
257 | } | |
258 | if (verb == AC_VERB_GET_PROC_COEF) { | |
259 | err = hda_reg_read_coef(codec, reg, val); | |
260 | goto out; | |
261 | } | |
a686ec4c TI |
262 | if ((verb & 0x700) == AC_VERB_SET_AMP_GAIN_MUTE) |
263 | reg &= ~AC_AMP_FAKE_MUTE; | |
264 | ||
33f81940 TI |
265 | err = snd_hdac_exec_verb(codec, reg, 0, val); |
266 | if (err < 0) | |
fc4f000b | 267 | goto out; |
33f81940 | 268 | /* special handling for asymmetric reads */ |
40ba66a7 | 269 | if (verb == AC_VERB_GET_POWER_STATE) { |
33f81940 TI |
270 | if (*val & AC_PWRST_ERROR) |
271 | *val = -1; | |
272 | else /* take only the actual state */ | |
273 | *val = (*val >> 4) & 0x0f; | |
274 | } | |
fc4f000b TI |
275 | out: |
276 | codec_pm_unlock(codec, pm_lock); | |
277 | return err; | |
4d75faa0 TI |
278 | } |
279 | ||
280 | static int hda_reg_write(void *context, unsigned int reg, unsigned int val) | |
281 | { | |
282 | struct hdac_device *codec = context; | |
283 | unsigned int verb; | |
284 | int i, bytes, err; | |
fc4f000b | 285 | int pm_lock = 0; |
4d75faa0 | 286 | |
98a226ed TI |
287 | if (codec->caps_overwriting) |
288 | return 0; | |
289 | ||
4d75faa0 TI |
290 | reg &= ~0x00080000U; /* drop GET bit */ |
291 | reg |= (codec->addr << 28); | |
9efe2731 TI |
292 | verb = get_verb(reg); |
293 | ||
fc4f000b TI |
294 | if (verb != AC_VERB_SET_POWER_STATE) { |
295 | pm_lock = codec_pm_lock(codec); | |
296 | if (pm_lock < 0) | |
297 | return codec->lazy_cache ? 0 : -EAGAIN; | |
298 | } | |
4d75faa0 | 299 | |
fc4f000b TI |
300 | if (is_stereo_amp_verb(reg)) { |
301 | err = hda_reg_write_stereo_amp(codec, reg, val); | |
302 | goto out; | |
303 | } | |
d313e0a8 | 304 | |
fc4f000b TI |
305 | if (verb == AC_VERB_SET_PROC_COEF) { |
306 | err = hda_reg_write_coef(codec, reg, val); | |
307 | goto out; | |
308 | } | |
40ba66a7 | 309 | |
4d75faa0 TI |
310 | switch (verb & 0xf00) { |
311 | case AC_VERB_SET_AMP_GAIN_MUTE: | |
a686ec4c TI |
312 | if ((reg & AC_AMP_FAKE_MUTE) && (val & AC_AMP_MUTE)) |
313 | val = 0; | |
4d75faa0 TI |
314 | verb = AC_VERB_SET_AMP_GAIN_MUTE; |
315 | if (reg & AC_AMP_GET_LEFT) | |
316 | verb |= AC_AMP_SET_LEFT >> 8; | |
317 | else | |
318 | verb |= AC_AMP_SET_RIGHT >> 8; | |
319 | if (reg & AC_AMP_GET_OUTPUT) { | |
320 | verb |= AC_AMP_SET_OUTPUT >> 8; | |
321 | } else { | |
322 | verb |= AC_AMP_SET_INPUT >> 8; | |
323 | verb |= reg & 0xf; | |
324 | } | |
325 | break; | |
326 | } | |
327 | ||
328 | switch (verb) { | |
329 | case AC_VERB_SET_DIGI_CONVERT_1: | |
330 | bytes = 2; | |
331 | break; | |
332 | case AC_VERB_SET_CONFIG_DEFAULT_BYTES_0: | |
333 | bytes = 4; | |
334 | break; | |
335 | default: | |
336 | bytes = 1; | |
337 | break; | |
338 | } | |
339 | ||
340 | for (i = 0; i < bytes; i++) { | |
341 | reg &= ~0xfffff; | |
342 | reg |= (verb + i) << 8 | ((val >> (8 * i)) & 0xff); | |
343 | err = snd_hdac_exec_verb(codec, reg, 0, NULL); | |
344 | if (err < 0) | |
fc4f000b | 345 | goto out; |
4d75faa0 TI |
346 | } |
347 | ||
fc4f000b TI |
348 | out: |
349 | codec_pm_unlock(codec, pm_lock); | |
350 | return err; | |
4d75faa0 TI |
351 | } |
352 | ||
353 | static const struct regmap_config hda_regmap_cfg = { | |
354 | .name = "hdaudio", | |
355 | .reg_bits = 32, | |
356 | .val_bits = 32, | |
357 | .max_register = 0xfffffff, | |
358 | .writeable_reg = hda_writeable_reg, | |
359 | .readable_reg = hda_readable_reg, | |
360 | .volatile_reg = hda_volatile_reg, | |
361 | .cache_type = REGCACHE_RBTREE, | |
362 | .reg_read = hda_reg_read, | |
363 | .reg_write = hda_reg_write, | |
1c96a2f6 DF |
364 | .use_single_read = true, |
365 | .use_single_write = true, | |
1a462be5 | 366 | .disable_locking = true, |
4d75faa0 TI |
367 | }; |
368 | ||
78dd5e21 TI |
369 | /** |
370 | * snd_hdac_regmap_init - Initialize regmap for HDA register accesses | |
371 | * @codec: the codec object | |
372 | * | |
373 | * Returns zero for success or a negative error code. | |
374 | */ | |
4d75faa0 TI |
375 | int snd_hdac_regmap_init(struct hdac_device *codec) |
376 | { | |
377 | struct regmap *regmap; | |
378 | ||
379 | regmap = regmap_init(&codec->dev, NULL, codec, &hda_regmap_cfg); | |
380 | if (IS_ERR(regmap)) | |
381 | return PTR_ERR(regmap); | |
382 | codec->regmap = regmap; | |
5e56bcea | 383 | snd_array_init(&codec->vendor_verbs, sizeof(unsigned int), 8); |
4d75faa0 TI |
384 | return 0; |
385 | } | |
386 | EXPORT_SYMBOL_GPL(snd_hdac_regmap_init); | |
387 | ||
78dd5e21 | 388 | /** |
3531ba21 | 389 | * snd_hdac_regmap_exit - Release the regmap from HDA codec |
78dd5e21 TI |
390 | * @codec: the codec object |
391 | */ | |
4d75faa0 TI |
392 | void snd_hdac_regmap_exit(struct hdac_device *codec) |
393 | { | |
394 | if (codec->regmap) { | |
395 | regmap_exit(codec->regmap); | |
396 | codec->regmap = NULL; | |
5e56bcea | 397 | snd_array_free(&codec->vendor_verbs); |
4d75faa0 TI |
398 | } |
399 | } | |
400 | EXPORT_SYMBOL_GPL(snd_hdac_regmap_exit); | |
401 | ||
5e56bcea TI |
402 | /** |
403 | * snd_hdac_regmap_add_vendor_verb - add a vendor-specific verb to regmap | |
404 | * @codec: the codec object | |
405 | * @verb: verb to allow accessing via regmap | |
406 | * | |
407 | * Returns zero for success or a negative error code. | |
408 | */ | |
409 | int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec, | |
410 | unsigned int verb) | |
411 | { | |
412 | unsigned int *p = snd_array_new(&codec->vendor_verbs); | |
413 | ||
414 | if (!p) | |
415 | return -ENOMEM; | |
d6eb9e3e | 416 | *p = verb | 0x800; /* set GET bit */ |
5e56bcea TI |
417 | return 0; |
418 | } | |
419 | EXPORT_SYMBOL_GPL(snd_hdac_regmap_add_vendor_verb); | |
420 | ||
4d75faa0 TI |
421 | /* |
422 | * helper functions | |
423 | */ | |
424 | ||
425 | /* write a pseudo-register value (w/o power sequence) */ | |
426 | static int reg_raw_write(struct hdac_device *codec, unsigned int reg, | |
427 | unsigned int val) | |
428 | { | |
1a462be5 TI |
429 | int err; |
430 | ||
431 | mutex_lock(&codec->regmap_lock); | |
4d75faa0 | 432 | if (!codec->regmap) |
1a462be5 | 433 | err = hda_reg_write(codec, reg, val); |
4d75faa0 | 434 | else |
1a462be5 TI |
435 | err = regmap_write(codec->regmap, reg, val); |
436 | mutex_unlock(&codec->regmap_lock); | |
437 | return err; | |
4d75faa0 TI |
438 | } |
439 | ||
1a462be5 TI |
440 | /* a helper macro to call @func_call; retry with power-up if failed */ |
441 | #define CALL_RAW_FUNC(codec, func_call) \ | |
442 | ({ \ | |
443 | int _err = func_call; \ | |
444 | if (_err == -EAGAIN) { \ | |
445 | _err = snd_hdac_power_up_pm(codec); \ | |
446 | if (_err >= 0) \ | |
447 | _err = func_call; \ | |
448 | snd_hdac_power_down_pm(codec); \ | |
449 | } \ | |
450 | _err;}) | |
451 | ||
4d75faa0 TI |
452 | /** |
453 | * snd_hdac_regmap_write_raw - write a pseudo register with power mgmt | |
454 | * @codec: the codec object | |
455 | * @reg: pseudo register | |
456 | * @val: value to write | |
457 | * | |
458 | * Returns zero if successful or a negative error code. | |
459 | */ | |
460 | int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg, | |
461 | unsigned int val) | |
462 | { | |
1a462be5 | 463 | return CALL_RAW_FUNC(codec, reg_raw_write(codec, reg, val)); |
4d75faa0 TI |
464 | } |
465 | EXPORT_SYMBOL_GPL(snd_hdac_regmap_write_raw); | |
466 | ||
467 | static int reg_raw_read(struct hdac_device *codec, unsigned int reg, | |
3194ed49 | 468 | unsigned int *val, bool uncached) |
4d75faa0 | 469 | { |
1a462be5 TI |
470 | int err; |
471 | ||
472 | mutex_lock(&codec->regmap_lock); | |
3194ed49 | 473 | if (uncached || !codec->regmap) |
1a462be5 | 474 | err = hda_reg_read(codec, reg, val); |
4d75faa0 | 475 | else |
1a462be5 TI |
476 | err = regmap_read(codec->regmap, reg, val); |
477 | mutex_unlock(&codec->regmap_lock); | |
478 | return err; | |
4d75faa0 TI |
479 | } |
480 | ||
3194ed49 TI |
481 | static int __snd_hdac_regmap_read_raw(struct hdac_device *codec, |
482 | unsigned int reg, unsigned int *val, | |
483 | bool uncached) | |
484 | { | |
1a462be5 | 485 | return CALL_RAW_FUNC(codec, reg_raw_read(codec, reg, val, uncached)); |
3194ed49 TI |
486 | } |
487 | ||
4d75faa0 TI |
488 | /** |
489 | * snd_hdac_regmap_read_raw - read a pseudo register with power mgmt | |
490 | * @codec: the codec object | |
491 | * @reg: pseudo register | |
492 | * @val: pointer to store the read value | |
493 | * | |
494 | * Returns zero if successful or a negative error code. | |
495 | */ | |
496 | int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg, | |
497 | unsigned int *val) | |
498 | { | |
3194ed49 | 499 | return __snd_hdac_regmap_read_raw(codec, reg, val, false); |
4d75faa0 TI |
500 | } |
501 | EXPORT_SYMBOL_GPL(snd_hdac_regmap_read_raw); | |
502 | ||
3194ed49 TI |
503 | /* Works like snd_hdac_regmap_read_raw(), but this doesn't read from the |
504 | * cache but always via hda verbs. | |
505 | */ | |
506 | int snd_hdac_regmap_read_raw_uncached(struct hdac_device *codec, | |
507 | unsigned int reg, unsigned int *val) | |
508 | { | |
509 | return __snd_hdac_regmap_read_raw(codec, reg, val, true); | |
510 | } | |
511 | ||
1a462be5 TI |
512 | static int reg_raw_update(struct hdac_device *codec, unsigned int reg, |
513 | unsigned int mask, unsigned int val) | |
514 | { | |
515 | unsigned int orig; | |
516 | bool change; | |
517 | int err; | |
518 | ||
519 | mutex_lock(&codec->regmap_lock); | |
520 | if (codec->regmap) { | |
521 | err = regmap_update_bits_check(codec->regmap, reg, mask, val, | |
522 | &change); | |
523 | if (!err) | |
524 | err = change ? 1 : 0; | |
525 | } else { | |
526 | err = hda_reg_read(codec, reg, &orig); | |
527 | if (!err) { | |
528 | val &= mask; | |
529 | val |= orig & ~mask; | |
530 | if (val != orig) { | |
531 | err = hda_reg_write(codec, reg, val); | |
532 | if (!err) | |
533 | err = 1; | |
534 | } | |
535 | } | |
536 | } | |
537 | mutex_unlock(&codec->regmap_lock); | |
538 | return err; | |
539 | } | |
540 | ||
4d75faa0 TI |
541 | /** |
542 | * snd_hdac_regmap_update_raw - update a pseudo register with power mgmt | |
543 | * @codec: the codec object | |
544 | * @reg: pseudo register | |
1a0986c1 | 545 | * @mask: bit mask to update |
4d75faa0 TI |
546 | * @val: value to update |
547 | * | |
548 | * Returns zero if successful or a negative error code. | |
549 | */ | |
550 | int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg, | |
551 | unsigned int mask, unsigned int val) | |
1a462be5 TI |
552 | { |
553 | return CALL_RAW_FUNC(codec, reg_raw_update(codec, reg, mask, val)); | |
554 | } | |
555 | EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw); | |
556 | ||
557 | static int reg_raw_update_once(struct hdac_device *codec, unsigned int reg, | |
558 | unsigned int mask, unsigned int val) | |
4d75faa0 TI |
559 | { |
560 | unsigned int orig; | |
561 | int err; | |
562 | ||
1a462be5 TI |
563 | if (!codec->regmap) |
564 | return reg_raw_update(codec, reg, mask, val); | |
565 | ||
566 | mutex_lock(&codec->regmap_lock); | |
567 | regcache_cache_only(codec->regmap, true); | |
568 | err = regmap_read(codec->regmap, reg, &orig); | |
569 | regcache_cache_only(codec->regmap, false); | |
4d75faa0 | 570 | if (err < 0) |
1a462be5 TI |
571 | err = regmap_update_bits(codec->regmap, reg, mask, val); |
572 | mutex_unlock(&codec->regmap_lock); | |
573 | return err; | |
4d75faa0 | 574 | } |
1a462be5 TI |
575 | |
576 | /** | |
577 | * snd_hdac_regmap_update_raw_once - initialize the register value only once | |
578 | * @codec: the codec object | |
579 | * @reg: pseudo register | |
580 | * @mask: bit mask to update | |
581 | * @val: value to update | |
582 | * | |
583 | * Performs the update of the register bits only once when the register | |
584 | * hasn't been initialized yet. Used in HD-audio legacy driver. | |
585 | * Returns zero if successful or a negative error code | |
586 | */ | |
587 | int snd_hdac_regmap_update_raw_once(struct hdac_device *codec, unsigned int reg, | |
588 | unsigned int mask, unsigned int val) | |
589 | { | |
590 | return CALL_RAW_FUNC(codec, reg_raw_update_once(codec, reg, mask, val)); | |
591 | } | |
592 | EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw_once); | |
593 | ||
594 | /** | |
595 | * snd_hdac_regmap_sync - sync out the cached values for PM resume | |
596 | * @codec: the codec object | |
597 | */ | |
598 | void snd_hdac_regmap_sync(struct hdac_device *codec) | |
599 | { | |
600 | if (codec->regmap) { | |
601 | mutex_lock(&codec->regmap_lock); | |
602 | regcache_sync(codec->regmap); | |
603 | mutex_unlock(&codec->regmap_lock); | |
604 | } | |
605 | } | |
606 | EXPORT_SYMBOL_GPL(snd_hdac_regmap_sync); |