[alsa-devel] [PATCH RFC 08/10] ALSA: usb-audio: Add resume support for FTU controls
Takashi Iwai
tiwai at suse.de
Thu Nov 20 18:33:33 CET 2014
A few FTU mixer controls have the own value handling, so they have to
be rewritten to follow the support for resume callbacks. This ended
up in a fair amount of refactoring. Its own struct is now removed,
instead the values are embedded in kctl private_value totally.
Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
sound/usb/mixer_quirks.c | 194 +++++++++++++----------------------------------
1 file changed, 54 insertions(+), 140 deletions(-)
diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c
index 29324f4b3a7b..29afad6aac04 100644
--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -892,14 +892,6 @@ static int snd_nativeinstruments_create_mixer(struct usb_mixer_interface *mixer,
/* M-Audio FastTrack Ultra quirks */
/* FTU Effect switch (also used by C400/C600) */
-struct snd_ftu_eff_switch_priv_val {
- struct usb_mixer_interface *mixer;
- int cached_value;
- int is_cached;
- int bUnitID;
- int validx;
-};
-
static int snd_ftu_eff_switch_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
@@ -911,138 +903,77 @@ static int snd_ftu_eff_switch_info(struct snd_kcontrol *kcontrol,
return snd_ctl_enum_info(uinfo, 1, ARRAY_SIZE(texts), texts);
}
-static int snd_ftu_eff_switch_get(struct snd_kcontrol *kctl,
- struct snd_ctl_elem_value *ucontrol)
+static int snd_ftu_eff_switch_init(struct usb_mixer_interface *mixer,
+ struct snd_kcontrol *kctl)
{
- struct snd_usb_audio *chip;
- struct usb_mixer_interface *mixer;
- struct snd_ftu_eff_switch_priv_val *pval;
+ struct usb_device *dev = mixer->chip->dev;
+ unsigned int pval = kctl->private_value;
int err;
unsigned char value[2];
- int id, validx;
-
- const int val_len = 2;
value[0] = 0x00;
value[1] = 0x00;
- pval = (struct snd_ftu_eff_switch_priv_val *)
- kctl->private_value;
+ err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC_GET_CUR,
+ USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ pval & 0xff00,
+ snd_usb_ctrl_intf(mixer->chip) | ((pval & 0xff) << 8),
+ value, 2);
+ if (err < 0)
+ return err;
- if (pval->is_cached) {
- ucontrol->value.enumerated.item[0] = pval->cached_value;
- return 0;
- }
+ kctl->private_value |= value[0] << 24;
+ return 0;
+}
- mixer = (struct usb_mixer_interface *) pval->mixer;
- if (snd_BUG_ON(!mixer))
- return -EINVAL;
+static int snd_ftu_eff_switch_get(struct snd_kcontrol *kctl,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ ucontrol->value.enumerated.item[0] = kctl->private_value >> 24;
+ return 0;
+}
- chip = (struct snd_usb_audio *) mixer->chip;
- if (snd_BUG_ON(!chip))
- return -EINVAL;
+static int snd_ftu_eff_switch_update(struct usb_mixer_elem_list *list)
+{
+ struct snd_usb_audio *chip = list->mixer->chip;
+ unsigned int pval = list->kctl->private_value;
+ unsigned char value[2];
+ int err;
- id = pval->bUnitID;
- validx = pval->validx;
+ value[0] = pval >> 24;
+ value[1] = 0;
- down_read(&mixer->chip->shutdown_rwsem);
- if (mixer->chip->shutdown)
+ down_read(&chip->shutdown_rwsem);
+ if (chip->shutdown)
err = -ENODEV;
else
err = snd_usb_ctl_msg(chip->dev,
- usb_rcvctrlpipe(chip->dev, 0), UAC_GET_CUR,
- USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- validx << 8, snd_usb_ctrl_intf(chip) | (id << 8),
- value, val_len);
- up_read(&mixer->chip->shutdown_rwsem);
- if (err < 0)
- return err;
-
- ucontrol->value.enumerated.item[0] = value[0];
- pval->cached_value = value[0];
- pval->is_cached = 1;
-
- return 0;
+ usb_sndctrlpipe(chip->dev, 0),
+ UAC_SET_CUR,
+ USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
+ pval & 0xff00,
+ snd_usb_ctrl_intf(chip) | ((pval & 0xff) << 8),
+ value, 2);
+ up_read(&chip->shutdown_rwsem);
+ return err;
}
static int snd_ftu_eff_switch_put(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *ucontrol)
{
- struct snd_usb_audio *chip;
- struct snd_ftu_eff_switch_priv_val *pval;
-
- struct usb_mixer_interface *mixer;
- int changed, cur_val, err, new_val;
- unsigned char value[2];
- int id, validx;
-
- const int val_len = 2;
-
- changed = 0;
+ struct usb_mixer_elem_list *list = snd_kcontrol_chip(kctl);
+ unsigned int pval = list->kctl->private_value;
+ int cur_val, err, new_val;
- pval = (struct snd_ftu_eff_switch_priv_val *)
- kctl->private_value;
- cur_val = pval->cached_value;
+ cur_val = pval >> 24;
new_val = ucontrol->value.enumerated.item[0];
+ if (cur_val == new_val)
+ return 0;
- mixer = (struct usb_mixer_interface *) pval->mixer;
- if (snd_BUG_ON(!mixer))
- return -EINVAL;
-
- chip = (struct snd_usb_audio *) mixer->chip;
- if (snd_BUG_ON(!chip))
- return -EINVAL;
-
- id = pval->bUnitID;
- validx = pval->validx;
-
- if (!pval->is_cached) {
- /* Read current value */
- down_read(&mixer->chip->shutdown_rwsem);
- if (mixer->chip->shutdown)
- err = -ENODEV;
- else
- err = snd_usb_ctl_msg(chip->dev,
- usb_rcvctrlpipe(chip->dev, 0), UAC_GET_CUR,
- USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- validx << 8, snd_usb_ctrl_intf(chip) | (id << 8),
- value, val_len);
- up_read(&mixer->chip->shutdown_rwsem);
- if (err < 0)
- return err;
-
- cur_val = value[0];
- pval->cached_value = cur_val;
- pval->is_cached = 1;
- }
- /* update value if needed */
- if (cur_val != new_val) {
- value[0] = new_val;
- value[1] = 0;
- down_read(&mixer->chip->shutdown_rwsem);
- if (mixer->chip->shutdown)
- err = -ENODEV;
- else
- err = snd_usb_ctl_msg(chip->dev,
- usb_sndctrlpipe(chip->dev, 0), UAC_SET_CUR,
- USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
- validx << 8, snd_usb_ctrl_intf(chip) | (id << 8),
- value, val_len);
- up_read(&mixer->chip->shutdown_rwsem);
- if (err < 0)
- return err;
-
- pval->cached_value = new_val;
- pval->is_cached = 1;
- changed = 1;
- }
-
- return changed;
-}
-
-static void kctl_private_value_free(struct snd_kcontrol *kctl)
-{
- kfree((void *)kctl->private_value);
+ kctl->private_value &= ~(0xff << 24);
+ kctl->private_value |= new_val << 24;
+ err = snd_ftu_eff_switch_update(list);
+ return err < 0 ? err : 1;
}
static int snd_ftu_create_effect_switch(struct usb_mixer_interface *mixer,
@@ -1057,33 +988,16 @@ static int snd_ftu_create_effect_switch(struct usb_mixer_interface *mixer,
.get = snd_ftu_eff_switch_get,
.put = snd_ftu_eff_switch_put
};
-
+ struct usb_mixer_elem_list *list;
int err;
- struct snd_kcontrol *kctl;
- struct snd_ftu_eff_switch_priv_val *pval;
-
- pval = kzalloc(sizeof(*pval), GFP_KERNEL);
- if (!pval)
- return -ENOMEM;
-
- pval->cached_value = 0;
- pval->is_cached = 0;
- pval->mixer = mixer;
- pval->bUnitID = bUnitID;
- pval->validx = validx;
- template.private_value = (unsigned long) pval;
- kctl = snd_ctl_new1(&template, mixer->chip);
- if (!kctl) {
- kfree(pval);
- return -ENOMEM;
- }
-
- kctl->private_free = kctl_private_value_free;
- err = snd_ctl_add(mixer->chip->card, kctl);
+ err = add_single_ctl_with_resume(mixer, bUnitID,
+ snd_ftu_eff_switch_update,
+ &template, &list);
if (err < 0)
return err;
-
+ list->kctl->private_value = (validx << 8) | bUnitID;
+ snd_ftu_eff_switch_init(mixer, list->kctl);
return 0;
}
--
2.1.3
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