1 // SPDX-License-Identifier: GPL-2.0+
3 // soc-ops.c -- Generic ASoC operations
5 // Copyright 2005 Wolfson Microelectronics PLC.
6 // Copyright 2005 Openedhand Ltd.
7 // Copyright (C) 2010 Slimlogic Ltd.
8 // Copyright (C) 2010 Texas Instruments Inc.
10 // Author: Liam Girdwood <lrg@slimlogic.co.uk>
11 // with code, comments and ideas from :-
12 // Richard Purdie <richard@openedhand.com>
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/init.h>
17 #include <linux/delay.h>
19 #include <linux/bitops.h>
20 #include <linux/ctype.h>
21 #include <linux/slab.h>
22 #include <sound/core.h>
23 #include <sound/jack.h>
24 #include <sound/pcm.h>
25 #include <sound/pcm_params.h>
26 #include <sound/soc.h>
27 #include <sound/soc-dpcm.h>
28 #include <sound/initval.h>
31 * snd_soc_info_enum_double - enumerated double mixer info callback
32 * @kcontrol: mixer control
33 * @uinfo: control element information
35 * Callback to provide information about a double enumerated
38 * Returns 0 for success.
40 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
41 struct snd_ctl_elem_info *uinfo)
43 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
45 return snd_ctl_enum_info(uinfo, e->shift_l == e->shift_r ? 1 : 2,
48 EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);
51 * snd_soc_get_enum_double - enumerated double mixer get callback
52 * @kcontrol: mixer control
53 * @ucontrol: control element information
55 * Callback to get the value of a double enumerated mixer.
57 * Returns 0 for success.
59 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
60 struct snd_ctl_elem_value *ucontrol)
62 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
63 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
64 unsigned int val, item;
68 ret = snd_soc_component_read(component, e->reg, ®_val);
71 val = (reg_val >> e->shift_l) & e->mask;
72 item = snd_soc_enum_val_to_item(e, val);
73 ucontrol->value.enumerated.item[0] = item;
74 if (e->shift_l != e->shift_r) {
75 val = (reg_val >> e->shift_r) & e->mask;
76 item = snd_soc_enum_val_to_item(e, val);
77 ucontrol->value.enumerated.item[1] = item;
82 EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);
85 * snd_soc_put_enum_double - enumerated double mixer put callback
86 * @kcontrol: mixer control
87 * @ucontrol: control element information
89 * Callback to set the value of a double enumerated mixer.
91 * Returns 0 for success.
93 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
94 struct snd_ctl_elem_value *ucontrol)
96 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
97 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
98 unsigned int *item = ucontrol->value.enumerated.item;
102 if (item[0] >= e->items)
104 val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
105 mask = e->mask << e->shift_l;
106 if (e->shift_l != e->shift_r) {
107 if (item[1] >= e->items)
109 val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_r;
110 mask |= e->mask << e->shift_r;
113 return snd_soc_component_update_bits(component, e->reg, mask, val);
115 EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
118 * snd_soc_read_signed - Read a codec register and interpret as signed value
119 * @component: component
120 * @reg: Register to read
121 * @mask: Mask to use after shifting the register value
122 * @shift: Right shift of register value
123 * @sign_bit: Bit that describes if a number is negative or not.
124 * @signed_val: Pointer to where the read value should be stored
126 * This functions reads a codec register. The register value is shifted right
127 * by 'shift' bits and masked with the given 'mask'. Afterwards it translates
128 * the given registervalue into a signed integer if sign_bit is non-zero.
130 * Returns 0 on sucess, otherwise an error value
132 static int snd_soc_read_signed(struct snd_soc_component *component,
133 unsigned int reg, unsigned int mask, unsigned int shift,
134 unsigned int sign_bit, int *signed_val)
139 ret = snd_soc_component_read(component, reg, &val);
143 val = (val >> shift) & mask;
150 /* non-negative number */
151 if (!(val & BIT(sign_bit))) {
159 * The register most probably does not contain a full-sized int.
160 * Instead we have an arbitrary number of bits in a signed
161 * representation which has to be translated into a full-sized int.
162 * This is done by filling up all bits above the sign-bit.
164 ret |= ~((int)(BIT(sign_bit) - 1));
172 * snd_soc_info_volsw - single mixer info callback
173 * @kcontrol: mixer control
174 * @uinfo: control element information
176 * Callback to provide information about a single mixer control, or a double
177 * mixer control that spans 2 registers.
179 * Returns 0 for success.
181 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
182 struct snd_ctl_elem_info *uinfo)
184 struct soc_mixer_control *mc =
185 (struct soc_mixer_control *)kcontrol->private_value;
188 if (!mc->platform_max)
189 mc->platform_max = mc->max;
190 platform_max = mc->platform_max;
192 if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
193 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
195 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
197 uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
198 uinfo->value.integer.min = 0;
199 uinfo->value.integer.max = platform_max - mc->min;
202 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
205 * snd_soc_info_volsw_sx - Mixer info callback for SX TLV controls
206 * @kcontrol: mixer control
207 * @uinfo: control element information
209 * Callback to provide information about a single mixer control, or a double
210 * mixer control that spans 2 registers of the SX TLV type. SX TLV controls
211 * have a range that represents both positive and negative values either side
212 * of zero but without a sign bit.
214 * Returns 0 for success.
216 int snd_soc_info_volsw_sx(struct snd_kcontrol *kcontrol,
217 struct snd_ctl_elem_info *uinfo)
219 struct soc_mixer_control *mc =
220 (struct soc_mixer_control *)kcontrol->private_value;
222 snd_soc_info_volsw(kcontrol, uinfo);
223 /* Max represents the number of levels in an SX control not the
224 * maximum value, so add the minimum value back on
226 uinfo->value.integer.max += mc->min;
230 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_sx);
233 * snd_soc_get_volsw - single mixer get callback
234 * @kcontrol: mixer control
235 * @ucontrol: control element information
237 * Callback to get the value of a single mixer control, or a double mixer
238 * control that spans 2 registers.
240 * Returns 0 for success.
242 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
243 struct snd_ctl_elem_value *ucontrol)
245 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
246 struct soc_mixer_control *mc =
247 (struct soc_mixer_control *)kcontrol->private_value;
248 unsigned int reg = mc->reg;
249 unsigned int reg2 = mc->rreg;
250 unsigned int shift = mc->shift;
251 unsigned int rshift = mc->rshift;
254 int sign_bit = mc->sign_bit;
255 unsigned int mask = (1 << fls(max)) - 1;
256 unsigned int invert = mc->invert;
261 mask = BIT(sign_bit + 1) - 1;
263 ret = snd_soc_read_signed(component, reg, mask, shift, sign_bit, &val);
267 ucontrol->value.integer.value[0] = val - min;
269 ucontrol->value.integer.value[0] =
270 max - ucontrol->value.integer.value[0];
272 if (snd_soc_volsw_is_stereo(mc)) {
274 ret = snd_soc_read_signed(component, reg, mask, rshift,
277 ret = snd_soc_read_signed(component, reg2, mask, shift,
282 ucontrol->value.integer.value[1] = val - min;
284 ucontrol->value.integer.value[1] =
285 max - ucontrol->value.integer.value[1];
290 EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
293 * snd_soc_put_volsw - single mixer put callback
294 * @kcontrol: mixer control
295 * @ucontrol: control element information
297 * Callback to set the value of a single mixer control, or a double mixer
298 * control that spans 2 registers.
300 * Returns 0 for success.
302 int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
303 struct snd_ctl_elem_value *ucontrol)
305 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
306 struct soc_mixer_control *mc =
307 (struct soc_mixer_control *)kcontrol->private_value;
308 unsigned int reg = mc->reg;
309 unsigned int reg2 = mc->rreg;
310 unsigned int shift = mc->shift;
311 unsigned int rshift = mc->rshift;
314 unsigned int sign_bit = mc->sign_bit;
315 unsigned int mask = (1 << fls(max)) - 1;
316 unsigned int invert = mc->invert;
318 bool type_2r = false;
319 unsigned int val2 = 0;
320 unsigned int val, val_mask;
323 mask = BIT(sign_bit + 1) - 1;
325 val = ucontrol->value.integer.value[0];
326 if (mc->platform_max && ((int)val + min) > mc->platform_max)
332 val = (val + min) & mask;
335 val_mask = mask << shift;
337 if (snd_soc_volsw_is_stereo(mc)) {
338 val2 = ucontrol->value.integer.value[1];
339 if (mc->platform_max && ((int)val2 + min) > mc->platform_max)
341 if (val2 > max - min)
345 val2 = (val2 + min) & mask;
349 val_mask |= mask << rshift;
350 val |= val2 << rshift;
352 val2 = val2 << shift;
356 err = snd_soc_component_update_bits(component, reg, val_mask, val);
362 err = snd_soc_component_update_bits(component, reg2, val_mask,
364 /* Don't discard any error code or drop change flag */
365 if (ret == 0 || err < 0) {
372 EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
375 * snd_soc_get_volsw_sx - single mixer get callback
376 * @kcontrol: mixer control
377 * @ucontrol: control element information
379 * Callback to get the value of a single mixer control, or a double mixer
380 * control that spans 2 registers.
382 * Returns 0 for success.
384 int snd_soc_get_volsw_sx(struct snd_kcontrol *kcontrol,
385 struct snd_ctl_elem_value *ucontrol)
387 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
388 struct soc_mixer_control *mc =
389 (struct soc_mixer_control *)kcontrol->private_value;
390 unsigned int reg = mc->reg;
391 unsigned int reg2 = mc->rreg;
392 unsigned int shift = mc->shift;
393 unsigned int rshift = mc->rshift;
396 unsigned int mask = (1U << (fls(min + max) - 1)) - 1;
400 ret = snd_soc_component_read(component, reg, &val);
404 ucontrol->value.integer.value[0] = ((val >> shift) - min) & mask;
406 if (snd_soc_volsw_is_stereo(mc)) {
407 ret = snd_soc_component_read(component, reg2, &val);
411 val = ((val >> rshift) - min) & mask;
412 ucontrol->value.integer.value[1] = val;
417 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_sx);
420 * snd_soc_put_volsw_sx - double mixer set callback
421 * @kcontrol: mixer control
422 * @ucontrol: control element information
424 * Callback to set the value of a double mixer control that spans 2 registers.
426 * Returns 0 for success.
428 int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol,
429 struct snd_ctl_elem_value *ucontrol)
431 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
432 struct soc_mixer_control *mc =
433 (struct soc_mixer_control *)kcontrol->private_value;
435 unsigned int reg = mc->reg;
436 unsigned int reg2 = mc->rreg;
437 unsigned int shift = mc->shift;
438 unsigned int rshift = mc->rshift;
441 unsigned int mask = (1U << (fls(min + max) - 1)) - 1;
443 unsigned int val, val_mask, val2 = 0;
445 val = ucontrol->value.integer.value[0];
446 if (mc->platform_max && val > mc->platform_max)
452 val_mask = mask << shift;
453 val = (val + min) & mask;
456 err = snd_soc_component_update_bits(component, reg, val_mask, val);
460 if (snd_soc_volsw_is_stereo(mc)) {
461 val_mask = mask << rshift;
462 val2 = (ucontrol->value.integer.value[1] + min) & mask;
463 val2 = val2 << rshift;
465 err = snd_soc_component_update_bits(component, reg2, val_mask,
470 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_sx);
473 * snd_soc_info_volsw_range - single mixer info callback with range.
474 * @kcontrol: mixer control
475 * @uinfo: control element information
477 * Callback to provide information, within a range, about a single
480 * returns 0 for success.
482 int snd_soc_info_volsw_range(struct snd_kcontrol *kcontrol,
483 struct snd_ctl_elem_info *uinfo)
485 struct soc_mixer_control *mc =
486 (struct soc_mixer_control *)kcontrol->private_value;
490 if (!mc->platform_max)
491 mc->platform_max = mc->max;
492 platform_max = mc->platform_max;
494 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
495 uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
496 uinfo->value.integer.min = 0;
497 uinfo->value.integer.max = platform_max - min;
501 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_range);
504 * snd_soc_put_volsw_range - single mixer put value callback with range.
505 * @kcontrol: mixer control
506 * @ucontrol: control element information
508 * Callback to set the value, within a range, for a single mixer control.
510 * Returns 0 for success.
512 int snd_soc_put_volsw_range(struct snd_kcontrol *kcontrol,
513 struct snd_ctl_elem_value *ucontrol)
515 struct soc_mixer_control *mc =
516 (struct soc_mixer_control *)kcontrol->private_value;
517 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
518 unsigned int reg = mc->reg;
519 unsigned int rreg = mc->rreg;
520 unsigned int shift = mc->shift;
523 unsigned int mask = (1 << fls(max)) - 1;
524 unsigned int invert = mc->invert;
525 unsigned int val, val_mask;
529 val = (max - ucontrol->value.integer.value[0]) & mask;
531 val = ((ucontrol->value.integer.value[0] + min) & mask);
532 val_mask = mask << shift;
535 err = snd_soc_component_update_bits(component, reg, val_mask, val);
540 if (snd_soc_volsw_is_stereo(mc)) {
542 val = (max - ucontrol->value.integer.value[1]) & mask;
544 val = ((ucontrol->value.integer.value[1] + min) & mask);
545 val_mask = mask << shift;
548 err = snd_soc_component_update_bits(component, rreg, val_mask,
550 /* Don't discard any error code or drop change flag */
551 if (ret == 0 || err < 0) {
558 EXPORT_SYMBOL_GPL(snd_soc_put_volsw_range);
561 * snd_soc_get_volsw_range - single mixer get callback with range
562 * @kcontrol: mixer control
563 * @ucontrol: control element information
565 * Callback to get the value, within a range, of a single mixer control.
567 * Returns 0 for success.
569 int snd_soc_get_volsw_range(struct snd_kcontrol *kcontrol,
570 struct snd_ctl_elem_value *ucontrol)
572 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
573 struct soc_mixer_control *mc =
574 (struct soc_mixer_control *)kcontrol->private_value;
575 unsigned int reg = mc->reg;
576 unsigned int rreg = mc->rreg;
577 unsigned int shift = mc->shift;
580 unsigned int mask = (1 << fls(max)) - 1;
581 unsigned int invert = mc->invert;
585 ret = snd_soc_component_read(component, reg, &val);
589 ucontrol->value.integer.value[0] = (val >> shift) & mask;
591 ucontrol->value.integer.value[0] =
592 max - ucontrol->value.integer.value[0];
594 ucontrol->value.integer.value[0] =
595 ucontrol->value.integer.value[0] - min;
597 if (snd_soc_volsw_is_stereo(mc)) {
598 ret = snd_soc_component_read(component, rreg, &val);
602 ucontrol->value.integer.value[1] = (val >> shift) & mask;
604 ucontrol->value.integer.value[1] =
605 max - ucontrol->value.integer.value[1];
607 ucontrol->value.integer.value[1] =
608 ucontrol->value.integer.value[1] - min;
613 EXPORT_SYMBOL_GPL(snd_soc_get_volsw_range);
616 * snd_soc_limit_volume - Set new limit to an existing volume control.
618 * @card: where to look for the control
619 * @name: Name of the control
620 * @max: new maximum limit
622 * Return 0 for success, else error.
624 int snd_soc_limit_volume(struct snd_soc_card *card,
625 const char *name, int max)
627 struct snd_card *snd_card = card->snd_card;
628 struct snd_kcontrol *kctl;
629 struct soc_mixer_control *mc;
633 /* Sanity check for name and max */
634 if (unlikely(!name || max <= 0))
637 list_for_each_entry(kctl, &snd_card->controls, list) {
638 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
644 mc = (struct soc_mixer_control *)kctl->private_value;
645 if (max <= mc->max) {
646 mc->platform_max = max;
652 EXPORT_SYMBOL_GPL(snd_soc_limit_volume);
654 int snd_soc_bytes_info(struct snd_kcontrol *kcontrol,
655 struct snd_ctl_elem_info *uinfo)
657 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
658 struct soc_bytes *params = (void *)kcontrol->private_value;
660 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
661 uinfo->count = params->num_regs * component->val_bytes;
665 EXPORT_SYMBOL_GPL(snd_soc_bytes_info);
667 int snd_soc_bytes_get(struct snd_kcontrol *kcontrol,
668 struct snd_ctl_elem_value *ucontrol)
670 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
671 struct soc_bytes *params = (void *)kcontrol->private_value;
674 if (component->regmap)
675 ret = regmap_raw_read(component->regmap, params->base,
676 ucontrol->value.bytes.data,
677 params->num_regs * component->val_bytes);
681 /* Hide any masked bytes to ensure consistent data reporting */
682 if (ret == 0 && params->mask) {
683 switch (component->val_bytes) {
685 ucontrol->value.bytes.data[0] &= ~params->mask;
688 ((u16 *)(&ucontrol->value.bytes.data))[0]
689 &= cpu_to_be16(~params->mask);
692 ((u32 *)(&ucontrol->value.bytes.data))[0]
693 &= cpu_to_be32(~params->mask);
702 EXPORT_SYMBOL_GPL(snd_soc_bytes_get);
704 int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
705 struct snd_ctl_elem_value *ucontrol)
707 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
708 struct soc_bytes *params = (void *)kcontrol->private_value;
710 unsigned int val, mask;
713 if (!component->regmap || !params->num_regs)
716 len = params->num_regs * component->val_bytes;
718 data = kmemdup(ucontrol->value.bytes.data, len, GFP_KERNEL | GFP_DMA);
723 * If we've got a mask then we need to preserve the register
724 * bits. We shouldn't modify the incoming data so take a
728 ret = regmap_read(component->regmap, params->base, &val);
734 switch (component->val_bytes) {
736 ((u8 *)data)[0] &= ~params->mask;
737 ((u8 *)data)[0] |= val;
740 mask = ~params->mask;
741 ret = regmap_parse_val(component->regmap,
746 ((u16 *)data)[0] &= mask;
748 ret = regmap_parse_val(component->regmap,
753 ((u16 *)data)[0] |= val;
756 mask = ~params->mask;
757 ret = regmap_parse_val(component->regmap,
762 ((u32 *)data)[0] &= mask;
764 ret = regmap_parse_val(component->regmap,
769 ((u32 *)data)[0] |= val;
777 ret = regmap_raw_write(component->regmap, params->base,
785 EXPORT_SYMBOL_GPL(snd_soc_bytes_put);
787 int snd_soc_bytes_info_ext(struct snd_kcontrol *kcontrol,
788 struct snd_ctl_elem_info *ucontrol)
790 struct soc_bytes_ext *params = (void *)kcontrol->private_value;
792 ucontrol->type = SNDRV_CTL_ELEM_TYPE_BYTES;
793 ucontrol->count = params->max;
797 EXPORT_SYMBOL_GPL(snd_soc_bytes_info_ext);
799 int snd_soc_bytes_tlv_callback(struct snd_kcontrol *kcontrol, int op_flag,
800 unsigned int size, unsigned int __user *tlv)
802 struct soc_bytes_ext *params = (void *)kcontrol->private_value;
803 unsigned int count = size < params->max ? size : params->max;
807 case SNDRV_CTL_TLV_OP_READ:
809 ret = params->get(kcontrol, tlv, count);
811 case SNDRV_CTL_TLV_OP_WRITE:
813 ret = params->put(kcontrol, tlv, count);
818 EXPORT_SYMBOL_GPL(snd_soc_bytes_tlv_callback);
821 * snd_soc_info_xr_sx - signed multi register info callback
822 * @kcontrol: mreg control
823 * @uinfo: control element information
825 * Callback to provide information of a control that can
826 * span multiple codec registers which together
827 * forms a single signed value in a MSB/LSB manner.
829 * Returns 0 for success.
831 int snd_soc_info_xr_sx(struct snd_kcontrol *kcontrol,
832 struct snd_ctl_elem_info *uinfo)
834 struct soc_mreg_control *mc =
835 (struct soc_mreg_control *)kcontrol->private_value;
836 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
838 uinfo->value.integer.min = mc->min;
839 uinfo->value.integer.max = mc->max;
843 EXPORT_SYMBOL_GPL(snd_soc_info_xr_sx);
846 * snd_soc_get_xr_sx - signed multi register get callback
847 * @kcontrol: mreg control
848 * @ucontrol: control element information
850 * Callback to get the value of a control that can span
851 * multiple codec registers which together forms a single
852 * signed value in a MSB/LSB manner. The control supports
853 * specifying total no of bits used to allow for bitfields
854 * across the multiple codec registers.
856 * Returns 0 for success.
858 int snd_soc_get_xr_sx(struct snd_kcontrol *kcontrol,
859 struct snd_ctl_elem_value *ucontrol)
861 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
862 struct soc_mreg_control *mc =
863 (struct soc_mreg_control *)kcontrol->private_value;
864 unsigned int regbase = mc->regbase;
865 unsigned int regcount = mc->regcount;
866 unsigned int regwshift = component->val_bytes * BITS_PER_BYTE;
867 unsigned int regwmask = (1UL<<regwshift)-1;
868 unsigned int invert = mc->invert;
869 unsigned long mask = (1UL<<mc->nbits)-1;
877 for (i = 0; i < regcount; i++) {
878 ret = snd_soc_component_read(component, regbase+i, ®val);
881 val |= (regval & regwmask) << (regwshift*(regcount-i-1));
884 if (min < 0 && val > max)
888 ucontrol->value.integer.value[0] = val;
892 EXPORT_SYMBOL_GPL(snd_soc_get_xr_sx);
895 * snd_soc_put_xr_sx - signed multi register get callback
896 * @kcontrol: mreg control
897 * @ucontrol: control element information
899 * Callback to set the value of a control that can span
900 * multiple codec registers which together forms a single
901 * signed value in a MSB/LSB manner. The control supports
902 * specifying total no of bits used to allow for bitfields
903 * across the multiple codec registers.
905 * Returns 0 for success.
907 int snd_soc_put_xr_sx(struct snd_kcontrol *kcontrol,
908 struct snd_ctl_elem_value *ucontrol)
910 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
911 struct soc_mreg_control *mc =
912 (struct soc_mreg_control *)kcontrol->private_value;
913 unsigned int regbase = mc->regbase;
914 unsigned int regcount = mc->regcount;
915 unsigned int regwshift = component->val_bytes * BITS_PER_BYTE;
916 unsigned int regwmask = (1UL<<regwshift)-1;
917 unsigned int invert = mc->invert;
918 unsigned long mask = (1UL<<mc->nbits)-1;
920 long val = ucontrol->value.integer.value[0];
921 unsigned int i, regval, regmask;
924 if (val < mc->min || val > mc->max)
929 for (i = 0; i < regcount; i++) {
930 regval = (val >> (regwshift*(regcount-i-1))) & regwmask;
931 regmask = (mask >> (regwshift*(regcount-i-1))) & regwmask;
932 err = snd_soc_component_update_bits(component, regbase+i,
940 EXPORT_SYMBOL_GPL(snd_soc_put_xr_sx);
943 * snd_soc_get_strobe - strobe get callback
944 * @kcontrol: mixer control
945 * @ucontrol: control element information
947 * Callback get the value of a strobe mixer control.
949 * Returns 0 for success.
951 int snd_soc_get_strobe(struct snd_kcontrol *kcontrol,
952 struct snd_ctl_elem_value *ucontrol)
954 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
955 struct soc_mixer_control *mc =
956 (struct soc_mixer_control *)kcontrol->private_value;
957 unsigned int reg = mc->reg;
958 unsigned int shift = mc->shift;
959 unsigned int mask = 1 << shift;
960 unsigned int invert = mc->invert != 0;
964 ret = snd_soc_component_read(component, reg, &val);
970 if (shift != 0 && val != 0)
972 ucontrol->value.enumerated.item[0] = val ^ invert;
976 EXPORT_SYMBOL_GPL(snd_soc_get_strobe);
979 * snd_soc_put_strobe - strobe put callback
980 * @kcontrol: mixer control
981 * @ucontrol: control element information
983 * Callback strobe a register bit to high then low (or the inverse)
984 * in one pass of a single mixer enum control.
986 * Returns 1 for success.
988 int snd_soc_put_strobe(struct snd_kcontrol *kcontrol,
989 struct snd_ctl_elem_value *ucontrol)
991 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
992 struct soc_mixer_control *mc =
993 (struct soc_mixer_control *)kcontrol->private_value;
994 unsigned int reg = mc->reg;
995 unsigned int shift = mc->shift;
996 unsigned int mask = 1 << shift;
997 unsigned int invert = mc->invert != 0;
998 unsigned int strobe = ucontrol->value.enumerated.item[0] != 0;
999 unsigned int val1 = (strobe ^ invert) ? mask : 0;
1000 unsigned int val2 = (strobe ^ invert) ? 0 : mask;
1003 err = snd_soc_component_update_bits(component, reg, mask, val1);
1007 return snd_soc_component_update_bits(component, reg, mask, val2);
1009 EXPORT_SYMBOL_GPL(snd_soc_put_strobe);