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TOMOYO Linux Cross Reference
Linux/include/sound/hda_regmap.h

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

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