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
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
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
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
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
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
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
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
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
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