1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * HD-audio regmap helpers
4  */
5 
6 #ifndef __SOUND_HDA_REGMAP_H
7 #define __SOUND_HDA_REGMAP_H
8 
9 #include <linux/regmap.h>
10 #include <sound/core.h>
11 #include <sound/hdaudio.h>
12 
13 #define AC_AMP_FAKE_MUTE	0x10	/* fake mute bit set to amp verbs */
14 
15 int snd_hdac_regmap_init(struct hdac_device *codec);
16 void snd_hdac_regmap_exit(struct hdac_device *codec);
17 int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec,
18 				    unsigned int verb);
19 int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
20 			     unsigned int *val);
21 int snd_hdac_regmap_read_raw_uncached(struct hdac_device *codec,
22 				      unsigned int reg, unsigned int *val);
23 int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
24 			      unsigned int val);
25 int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg,
26 			       unsigned int mask, unsigned int val);
27 int snd_hdac_regmap_update_raw_once(struct hdac_device *codec, unsigned int reg,
28 				    unsigned int mask, unsigned int val);
29 void snd_hdac_regmap_sync(struct hdac_device *codec);
30 
31 /**
32  * snd_hdac_regmap_encode_verb - encode the verb to a pseudo register
33  * @nid: widget NID
34  * @verb: codec verb
35  *
36  * Returns an encoded pseudo register.
37  */
38 #define snd_hdac_regmap_encode_verb(nid, verb)		\
39 	(((verb) << 8) | 0x80000 | ((unsigned int)(nid) << 20))
40 
41 /**
42  * snd_hdac_regmap_encode_amp - encode the AMP verb to a pseudo register
43  * @nid: widget NID
44  * @ch: channel (left = 0, right = 1)
45  * @dir: direction (#HDA_INPUT, #HDA_OUTPUT)
46  * @idx: input index value
47  *
48  * Returns an encoded pseudo register.
49  */
50 #define snd_hdac_regmap_encode_amp(nid, ch, dir, idx)			\
51 	(snd_hdac_regmap_encode_verb(nid, AC_VERB_GET_AMP_GAIN_MUTE) |	\
52 	 ((ch) ? AC_AMP_GET_RIGHT : AC_AMP_GET_LEFT) |			\
53 	 ((dir) == HDA_OUTPUT ? AC_AMP_GET_OUTPUT : AC_AMP_GET_INPUT) | \
54 	 (idx))
55 
56 /**
57  * snd_hdac_regmap_encode_amp_stereo - encode a pseudo register for stereo AMPs
58  * @nid: widget NID
59  * @dir: direction (#HDA_INPUT, #HDA_OUTPUT)
60  * @idx: input index value
61  *
62  * Returns an encoded pseudo register.
63  */
64 #define snd_hdac_regmap_encode_amp_stereo(nid, dir, idx)		\
65 	(snd_hdac_regmap_encode_verb(nid, AC_VERB_GET_AMP_GAIN_MUTE) |	\
66 	 AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT | /* both bits set! */	\
67 	 ((dir) == HDA_OUTPUT ? AC_AMP_GET_OUTPUT : AC_AMP_GET_INPUT) | \
68 	 (idx))
69 
70 /**
71  * snd_hdac_regmap_write - Write a verb with caching
72  * @nid: codec NID
73  * @reg: verb to write
74  * @val: value to write
75  *
76  * For writing an amp value, use snd_hdac_regmap_update_amp().
77  */
78 static inline int
snd_hdac_regmap_write(struct hdac_device * codec,hda_nid_t nid,unsigned int verb,unsigned int val)79 snd_hdac_regmap_write(struct hdac_device *codec, hda_nid_t nid,
80 		      unsigned int verb, unsigned int val)
81 {
82 	unsigned int cmd = snd_hdac_regmap_encode_verb(nid, verb);
83 
84 	return snd_hdac_regmap_write_raw(codec, cmd, val);
85 }
86 
87 /**
88  * snd_hda_regmap_update - Update a verb value with caching
89  * @nid: codec NID
90  * @verb: verb to update
91  * @mask: bit mask to update
92  * @val: value to update
93  *
94  * For updating an amp value, use snd_hdac_regmap_update_amp().
95  */
96 static inline int
snd_hdac_regmap_update(struct hdac_device * codec,hda_nid_t nid,unsigned int verb,unsigned int mask,unsigned int val)97 snd_hdac_regmap_update(struct hdac_device *codec, hda_nid_t nid,
98 		       unsigned int verb, unsigned int mask,
99 		       unsigned int val)
100 {
101 	unsigned int cmd = snd_hdac_regmap_encode_verb(nid, verb);
102 
103 	return snd_hdac_regmap_update_raw(codec, cmd, mask, val);
104 }
105 
106 /**
107  * snd_hda_regmap_read - Read a verb with caching
108  * @nid: codec NID
109  * @verb: verb to read
110  * @val: pointer to store the value
111  *
112  * For reading an amp value, use snd_hda_regmap_get_amp().
113  */
114 static inline int
snd_hdac_regmap_read(struct hdac_device * codec,hda_nid_t nid,unsigned int verb,unsigned int * val)115 snd_hdac_regmap_read(struct hdac_device *codec, hda_nid_t nid,
116 		     unsigned int verb, unsigned int *val)
117 {
118 	unsigned int cmd = snd_hdac_regmap_encode_verb(nid, verb);
119 
120 	return snd_hdac_regmap_read_raw(codec, cmd, val);
121 }
122 
123 /**
124  * snd_hdac_regmap_get_amp - Read AMP value
125  * @codec: HD-audio codec
126  * @nid: NID to read the AMP value
127  * @ch: channel (left=0 or right=1)
128  * @direction: #HDA_INPUT or #HDA_OUTPUT
129  * @index: the index value (only for input direction)
130  * @val: the pointer to store the value
131  *
132  * Read AMP value.  The volume is between 0 to 0x7f, 0x80 = mute bit.
133  * Returns the value or a negative error.
134  */
135 static inline int
snd_hdac_regmap_get_amp(struct hdac_device * codec,hda_nid_t nid,int ch,int dir,int idx)136 snd_hdac_regmap_get_amp(struct hdac_device *codec, hda_nid_t nid,
137 			int ch, int dir, int idx)
138 {
139 	unsigned int cmd = snd_hdac_regmap_encode_amp(nid, ch, dir, idx);
140 	int err, val;
141 
142 	err = snd_hdac_regmap_read_raw(codec, cmd, &val);
143 	return err < 0 ? err : val;
144 }
145 
146 /**
147  * snd_hdac_regmap_update_amp - update the AMP value
148  * @codec: HD-audio codec
149  * @nid: NID to read the AMP value
150  * @ch: channel (left=0 or right=1)
151  * @direction: #HDA_INPUT or #HDA_OUTPUT
152  * @idx: the index value (only for input direction)
153  * @mask: bit mask to set
154  * @val: the bits value to set
155  *
156  * Update the AMP value with a bit mask.
157  * Returns 0 if the value is unchanged, 1 if changed, or a negative error.
158  */
159 static inline int
snd_hdac_regmap_update_amp(struct hdac_device * codec,hda_nid_t nid,int ch,int dir,int idx,int mask,int val)160 snd_hdac_regmap_update_amp(struct hdac_device *codec, hda_nid_t nid,
161 			   int ch, int dir, int idx, int mask, int val)
162 {
163 	unsigned int cmd = snd_hdac_regmap_encode_amp(nid, ch, dir, idx);
164 
165 	return snd_hdac_regmap_update_raw(codec, cmd, mask, val);
166 }
167 
168 /**
169  * snd_hdac_regmap_get_amp_stereo - Read stereo AMP values
170  * @codec: HD-audio codec
171  * @nid: NID to read the AMP value
172  * @ch: channel (left=0 or right=1)
173  * @direction: #HDA_INPUT or #HDA_OUTPUT
174  * @index: the index value (only for input direction)
175  * @val: the pointer to store the value
176  *
177  * Read stereo AMP values.  The lower byte is left, the upper byte is right.
178  * Returns the value or a negative error.
179  */
180 static inline int
snd_hdac_regmap_get_amp_stereo(struct hdac_device * codec,hda_nid_t nid,int dir,int idx)181 snd_hdac_regmap_get_amp_stereo(struct hdac_device *codec, hda_nid_t nid,
182 			       int dir, int idx)
183 {
184 	unsigned int cmd = snd_hdac_regmap_encode_amp_stereo(nid, dir, idx);
185 	int err, val;
186 
187 	err = snd_hdac_regmap_read_raw(codec, cmd, &val);
188 	return err < 0 ? err : val;
189 }
190 
191 /**
192  * snd_hdac_regmap_update_amp_stereo - update the stereo AMP value
193  * @codec: HD-audio codec
194  * @nid: NID to read the AMP value
195  * @direction: #HDA_INPUT or #HDA_OUTPUT
196  * @idx: the index value (only for input direction)
197  * @mask: bit mask to set
198  * @val: the bits value to set
199  *
200  * Update the stereo AMP value with a bit mask.
201  * The lower byte is left, the upper byte is right.
202  * Returns 0 if the value is unchanged, 1 if changed, or a negative error.
203  */
204 static inline int
snd_hdac_regmap_update_amp_stereo(struct hdac_device * codec,hda_nid_t nid,int dir,int idx,int mask,int val)205 snd_hdac_regmap_update_amp_stereo(struct hdac_device *codec, hda_nid_t nid,
206 				  int dir, int idx, int mask, int val)
207 {
208 	unsigned int cmd = snd_hdac_regmap_encode_amp_stereo(nid, dir, idx);
209 
210 	return snd_hdac_regmap_update_raw(codec, cmd, mask, val);
211 }
212 
213 /**
214  * snd_hdac_regmap_sync_node - sync the widget node attributes
215  * @codec: HD-audio codec
216  * @nid: NID to sync
217  */
218 static inline void
snd_hdac_regmap_sync_node(struct hdac_device * codec,hda_nid_t nid)219 snd_hdac_regmap_sync_node(struct hdac_device *codec, hda_nid_t nid)
220 {
221 	regcache_mark_dirty(codec->regmap);
222 	regcache_sync_region(codec->regmap, nid << 20, ((nid + 1) << 20) - 1);
223 }
224 
225 #endif /* __SOUND_HDA_REGMAP_H */
226