ALSA OXFW driver uses AV/C Audio Subunit commands to control some models. The commands get/set the state of Feature function block of the subunit. The commands are not specific to OXFW, thus there's a possibility to use them in the other drivers.
Currently, helper functions for the commands require 'struct snd_oxfw', although, it's necessarily required. It's better to change prototype of the functions without the structure for future use.
This commit changes the prototype.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/firewire/oxfw/oxfw-spkr.c | 54 +++++++++++++++++++++++------------------ 1 file changed, 31 insertions(+), 23 deletions(-)
diff --git a/sound/firewire/oxfw/oxfw-spkr.c b/sound/firewire/oxfw/oxfw-spkr.c index fde6b76..d733a15 100644 --- a/sound/firewire/oxfw/oxfw-spkr.c +++ b/sound/firewire/oxfw/oxfw-spkr.c @@ -14,8 +14,8 @@ enum control_attribute { CTL_CURRENT = 0x10, };
-static int spkr_mute_command(struct snd_oxfw *oxfw, bool *value, - enum control_action action) +static int avc_audio_feature_mute(struct fw_unit *unit, u8 fb_id, bool *value, + enum control_action action) { u8 *buf; u8 response_ok; @@ -35,7 +35,7 @@ static int spkr_mute_command(struct snd_oxfw *oxfw, bool *value, buf[1] = 0x08; /* audio unit 0 */ buf[2] = 0xb8; /* FUNCTION BLOCK */ buf[3] = 0x81; /* function block type: feature */ - buf[4] = oxfw->device_info->mute_fb_id; /* function block ID */ + buf[4] = fb_id; /* function block ID */ buf[5] = 0x10; /* control attribute: current */ buf[6] = 0x02; /* selector length */ buf[7] = 0x00; /* audio channel number */ @@ -46,16 +46,16 @@ static int spkr_mute_command(struct snd_oxfw *oxfw, bool *value, else buf[10] = *value ? 0x70 : 0x60;
- err = fcp_avc_transaction(oxfw->unit, buf, 11, buf, 11, 0x3fe); + err = fcp_avc_transaction(unit, buf, 11, buf, 11, 0x3fe); if (err < 0) goto error; if (err < 11) { - dev_err(&oxfw->unit->device, "short FCP response\n"); + dev_err(&unit->device, "short FCP response\n"); err = -EIO; goto error; } if (buf[0] != response_ok) { - dev_err(&oxfw->unit->device, "mute command failed\n"); + dev_err(&unit->device, "mute command failed\n"); err = -EIO; goto error; } @@ -70,10 +70,10 @@ error: return err; }
-static int spkr_volume_command(struct snd_oxfw *oxfw, s16 *value, - unsigned int channel, - enum control_attribute attribute, - enum control_action action) +static int avc_audio_feature_volume(struct fw_unit *unit, u8 fb_id, s16 *value, + unsigned int channel, + enum control_attribute attribute, + enum control_action action) { u8 *buf; u8 response_ok; @@ -93,7 +93,7 @@ static int spkr_volume_command(struct snd_oxfw *oxfw, s16 *value, buf[1] = 0x08; /* audio unit 0 */ buf[2] = 0xb8; /* FUNCTION BLOCK */ buf[3] = 0x81; /* function block type: feature */ - buf[4] = oxfw->device_info->volume_fb_id; /* function block ID */ + buf[4] = fb_id; /* function block ID */ buf[5] = attribute; /* control attribute */ buf[6] = 0x02; /* selector length */ buf[7] = channel; /* audio channel number */ @@ -107,16 +107,16 @@ static int spkr_volume_command(struct snd_oxfw *oxfw, s16 *value, buf[11] = *value; }
- err = fcp_avc_transaction(oxfw->unit, buf, 12, buf, 12, 0x3fe); + err = fcp_avc_transaction(unit, buf, 12, buf, 12, 0x3fe); if (err < 0) goto error; if (err < 12) { - dev_err(&oxfw->unit->device, "short FCP response\n"); + dev_err(&unit->device, "short FCP response\n"); err = -EIO; goto error; } if (buf[0] != response_ok) { - dev_err(&oxfw->unit->device, "volume command failed\n"); + dev_err(&unit->device, "volume command failed\n"); err = -EIO; goto error; } @@ -153,7 +153,8 @@ static int spkr_mute_put(struct snd_kcontrol *control, if (mute == oxfw->mute) return 0;
- err = spkr_mute_command(oxfw, &mute, CTL_WRITE); + err = avc_audio_feature_mute(oxfw->unit, oxfw->device_info->mute_fb_id, + &mute, CTL_WRITE); if (err < 0) return err; oxfw->mute = mute; @@ -218,8 +219,10 @@ static int spkr_volume_put(struct snd_kcontrol *control, for (i = 0; i <= oxfw->device_info->mixer_channels; ++i) { volume = value->value.integer.value[channel_map[i ? i - 1 : 0]]; if (changed_channels & (1 << i)) { - err = spkr_volume_command(oxfw, &volume, i, - CTL_CURRENT, CTL_WRITE); + err = avc_audio_feature_volume(oxfw->unit, + oxfw->device_info->mute_fb_id, + &volume, + i, CTL_CURRENT, CTL_WRITE); if (err < 0) return err; } @@ -251,22 +254,27 @@ int snd_oxfw_add_spkr(struct snd_oxfw *oxfw) unsigned int i, first_ch; int err;
- err = spkr_volume_command(oxfw, &oxfw->volume_min, - 0, CTL_MIN, CTL_READ); + err = avc_audio_feature_volume(oxfw->unit, + oxfw->device_info->volume_fb_id, + &oxfw->volume_min, 0, CTL_MIN, CTL_READ); if (err < 0) return err; - err = spkr_volume_command(oxfw, &oxfw->volume_max, - 0, CTL_MAX, CTL_READ); + err = avc_audio_feature_volume(oxfw->unit, + oxfw->device_info->volume_fb_id, + &oxfw->volume_max, 0, CTL_MAX, CTL_READ); if (err < 0) return err;
- err = spkr_mute_command(oxfw, &oxfw->mute, CTL_READ); + err = avc_audio_feature_mute(oxfw->unit, oxfw->device_info->mute_fb_id, + &oxfw->mute, CTL_READ); if (err < 0) return err;
first_ch = oxfw->device_info->mixer_channels == 1 ? 0 : 1; for (i = 0; i < oxfw->device_info->mixer_channels; ++i) { - err = spkr_volume_command(oxfw, &oxfw->volume[i], + err = avc_audio_feature_volume(oxfw->unit, + oxfw->device_info->volume_fb_id, + &oxfw->volume[i], first_ch + i, CTL_CURRENT, CTL_READ); if (err < 0) return err;