include/sound/hda_regmap.h

   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 int snd_hdac_regmap_init(struct hdac_device *codec);
  13 void snd_hdac_regmap_exit(struct hdac_device *codec);
  14 int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec,
  15                                     unsigned int verb);
  16 int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
  17                              unsigned int *val);
  18 int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
  19                               unsigned int val);
  20 int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg,
  21                                unsigned int mask, unsigned int val);
  22
  23 /**
  24  * snd_hdac_regmap_encode_verb - encode the verb to a pseudo register
  25  * @nid: widget NID
  26  * @verb: codec verb
  27  *
  28  * Returns an encoded pseudo register.
  29  */
  30 #define snd_hdac_regmap_encode_verb(nid, verb)          \
  31         (((verb) << 8) | 0x80000 | ((unsigned int)(nid) << 20))
  32
  33 /**
  34  * snd_hdac_regmap_encode_amp - encode the AMP verb to a pseudo register
  35  * @nid: widget NID
  36  * @ch: channel (left = 0, right = 1)
  37  * @dir: direction (#HDA_INPUT, #HDA_OUTPUT)
  38  * @idx: input index value
  39  *
  40  * Returns an encoded pseudo register.
  41  */
  42 #define snd_hdac_regmap_encode_amp(nid, ch, dir, idx)                   \
  43         (snd_hdac_regmap_encode_verb(nid, AC_VERB_GET_AMP_GAIN_MUTE) |  \
  44          ((ch) ? AC_AMP_GET_RIGHT : AC_AMP_GET_LEFT) |                  \
  45          ((dir) == HDA_OUTPUT ? AC_AMP_GET_OUTPUT : AC_AMP_GET_INPUT) | \
  46          (idx))
  47
  48 /**
  49  * snd_hdac_regmap_write - Write a verb with caching
  50  * @nid: codec NID
  51  * @reg: verb to write
  52  * @val: value to write
  53  *
  54  * For writing an amp value, use snd_hda_regmap_amp_update().
  55  */
  56 static inline int
  57 snd_hdac_regmap_write(struct hdac_device *codec, hda_nid_t nid,
  58                       unsigned int verb, unsigned int val)
  59 {
  60         unsigned int cmd = snd_hdac_regmap_encode_verb(nid, verb);
  61
  62         return snd_hdac_regmap_write_raw(codec, cmd, val);
  63 }
  64
  65 /**
  66  * snd_hda_regmap_update - Update a verb value with caching
  67  * @nid: codec NID
  68  * @verb: verb to update
  69  * @mask: bit mask to update
  70  * @val: value to update
  71  *
  72  * For updating an amp value, use snd_hda_regmap_amp_update().
  73  */
  74 static inline int
  75 snd_hdac_regmap_update(struct hdac_device *codec, hda_nid_t nid,
  76                        unsigned int verb, unsigned int mask,
  77                        unsigned int val)
  78 {
  79         unsigned int cmd = snd_hdac_regmap_encode_verb(nid, verb);
  80
  81         return snd_hdac_regmap_update_raw(codec, cmd, mask, val);
  82 }
  83
  84 /**
  85  * snd_hda_regmap_read - Read a verb with caching
  86  * @nid: codec NID
  87  * @verb: verb to read
  88  * @val: pointer to store the value
  89  *
  90  * For reading an amp value, use snd_hda_regmap_get_amp().
  91  */
  92 static inline int
  93 snd_hdac_regmap_read(struct hdac_device *codec, hda_nid_t nid,
  94                      unsigned int verb, unsigned int *val)
  95 {
  96         unsigned int cmd = snd_hdac_regmap_encode_verb(nid, verb);
  97
  98         return snd_hdac_regmap_read_raw(codec, cmd, val);
  99 }
 100
 101 /**
 102  * snd_hdac_regmap_get_amp - Read AMP value
 103  * @codec: HD-audio codec
 104  * @nid: NID to read the AMP value
 105  * @ch: channel (left=0 or right=1)
 106  * @direction: #HDA_INPUT or #HDA_OUTPUT
 107  * @index: the index value (only for input direction)
 108  * @val: the pointer to store the value
 109  *
 110  * Read AMP value.  The volume is between 0 to 0x7f, 0x80 = mute bit.
 111  * Returns the value or a negative error.
 112  */
 113 static inline int
 114 snd_hdac_regmap_get_amp(struct hdac_device *codec, hda_nid_t nid,
 115                         int ch, int dir, int idx)
 116 {
 117         unsigned int cmd = snd_hdac_regmap_encode_amp(nid, ch, dir, idx);
 118         int err, val;
 119
 120         err = snd_hdac_regmap_read_raw(codec, cmd, &val);
 121         return err < 0 ? err : val;
 122 }
 123
 124 /**
 125  * snd_hdac_regmap_update_amp - update the AMP value
 126  * @codec: HD-audio codec
 127  * @nid: NID to read the AMP value
 128  * @ch: channel (left=0 or right=1)
 129  * @direction: #HDA_INPUT or #HDA_OUTPUT
 130  * @idx: the index value (only for input direction)
 131  * @mask: bit mask to set
 132  * @val: the bits value to set
 133  *
 134  * Update the AMP value with a bit mask.
 135  * Returns 0 if the value is unchanged, 1 if changed, or a negative error.
 136  */
 137 static inline int
 138 snd_hdac_regmap_update_amp(struct hdac_device *codec, hda_nid_t nid,
 139                            int ch, int dir, int idx, int mask, int val)
 140 {
 141         unsigned int cmd = snd_hdac_regmap_encode_amp(nid, ch, dir, idx);
 142
 143         return snd_hdac_regmap_update_raw(codec, cmd, mask, val);
 144 }
 145
 146 #endif /* __SOUND_HDA_REGMAP_H */