root/include/sound/hda_regmap.h

INCLUDED FROM

DEFINITIONS

1. snd_hdac_regmap_write
2. snd_hdac_regmap_update
3. snd_hdac_regmap_read
4. snd_hdac_regmap_get_amp
5. snd_hdac_regmap_update_amp
6. snd_hdac_regmap_get_amp_stereo
7. snd_hdac_regmap_update_amp_stereo
8. snd_hdac_regmap_sync_node

   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 */