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-rw-r--r--sound/usb/mixer.c77
1 files changed, 42 insertions, 35 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 736d134cc03c..c166db0057d3 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -26,6 +26,22 @@
*
*/
+/*
+ * TODOs, for both the mixer and the streaming interfaces:
+ *
+ * - support for UAC2 effect units
+ * - support for graphical equalizers
+ * - RANGE and MEM set commands (UAC2)
+ * - RANGE and MEM interrupt dispatchers (UAC2)
+ * - audio channel clustering (UAC2)
+ * - audio sample rate converter units (UAC2)
+ * - proper handling of clock multipliers (UAC2)
+ * - dispatch clock change notifications (UAC2)
+ * - stop PCM streams which use a clock that became invalid
+ * - stop PCM streams which use a clock selector that has changed
+ * - parse available sample rates again when clock sources changed
+ */
+
#include <linux/bitops.h>
#include <linux/init.h>
#include <linux/list.h>
@@ -275,28 +291,28 @@ static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
{
+ struct snd_usb_audio *chip = cval->mixer->chip;
unsigned char buf[2];
int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
int timeout = 10;
while (timeout-- > 0) {
- if (snd_usb_ctl_msg(cval->mixer->chip->dev,
- usb_rcvctrlpipe(cval->mixer->chip->dev, 0),
- request,
+ if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- validx, cval->mixer->ctrlif | (cval->id << 8),
+ validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
buf, val_len, 100) >= val_len) {
*value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
return 0;
}
}
snd_printdd(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
- request, validx, cval->mixer->ctrlif | (cval->id << 8), cval->val_type);
+ request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type);
return -EINVAL;
}
static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
{
+ struct snd_usb_audio *chip = cval->mixer->chip;
unsigned char buf[2 + 3*sizeof(__u16)]; /* enough space for one range */
unsigned char *val;
int ret, size;
@@ -312,16 +328,14 @@ static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int v
memset(buf, 0, sizeof(buf));
- ret = snd_usb_ctl_msg(cval->mixer->chip->dev,
- usb_rcvctrlpipe(cval->mixer->chip->dev, 0),
- bRequest,
+ ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- validx, cval->mixer->ctrlif | (cval->id << 8),
+ validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
buf, size, 1000);
if (ret < 0) {
snd_printk(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
- request, validx, cval->mixer->ctrlif | (cval->id << 8), cval->val_type);
+ request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type);
return ret;
}
@@ -397,6 +411,7 @@ static int get_cur_mix_value(struct usb_mixer_elem_info *cval,
int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
int request, int validx, int value_set)
{
+ struct snd_usb_audio *chip = cval->mixer->chip;
unsigned char buf[2];
int val_len, timeout = 10;
@@ -419,15 +434,14 @@ int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
buf[0] = value_set & 0xff;
buf[1] = (value_set >> 8) & 0xff;
while (timeout-- > 0)
- if (snd_usb_ctl_msg(cval->mixer->chip->dev,
- usb_sndctrlpipe(cval->mixer->chip->dev, 0),
- request,
+ if (snd_usb_ctl_msg(chip->dev,
+ usb_sndctrlpipe(chip->dev, 0), request,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
- validx, cval->mixer->ctrlif | (cval->id << 8),
+ validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
buf, val_len, 100) >= 0)
return 0;
snd_printdd(KERN_ERR "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
- request, validx, cval->mixer->ctrlif | (cval->id << 8), cval->val_type, buf[0], buf[1]);
+ request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type, buf[0], buf[1]);
return -EINVAL;
}
@@ -582,9 +596,9 @@ static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm
switch (iterm->type >> 16) {
case UAC_SELECTOR_UNIT:
strcpy(name, "Selector"); return 8;
- case UAC_PROCESSING_UNIT_V1:
+ case UAC1_PROCESSING_UNIT:
strcpy(name, "Process Unit"); return 12;
- case UAC_EXTENSION_UNIT_V1:
+ case UAC1_EXTENSION_UNIT:
strcpy(name, "Ext Unit"); return 8;
case UAC_MIXER_UNIT:
strcpy(name, "Mixer"); return 5;
@@ -672,8 +686,8 @@ static int check_input_term(struct mixer_build *state, int id, struct usb_audio_
term->name = uac_selector_unit_iSelector(d);
return 0;
}
- case UAC_PROCESSING_UNIT_V1:
- case UAC_EXTENSION_UNIT_V1: {
+ case UAC1_PROCESSING_UNIT:
+ case UAC1_EXTENSION_UNIT: {
struct uac_processing_unit_descriptor *d = p1;
if (d->bNrInPins) {
id = d->baSourceID[0];
@@ -745,6 +759,8 @@ static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
*/
static int get_min_max(struct usb_mixer_elem_info *cval, int default_min)
{
+ struct snd_usb_audio *chip = cval->mixer->chip;
+
/* for failsafe */
cval->min = default_min;
cval->max = cval->min + 1;
@@ -767,7 +783,7 @@ static int get_min_max(struct usb_mixer_elem_info *cval, int default_min)
if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
snd_printd(KERN_ERR "%d:%d: cannot get min/max values for control %d (id %d)\n",
- cval->id, cval->mixer->ctrlif, cval->control, cval->id);
+ cval->id, snd_usb_ctrl_intf(chip), cval->control, cval->id);
return -EINVAL;
}
if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) {
@@ -1199,14 +1215,6 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void
}
} else { /* UAC_VERSION_2 */
for (i = 0; i < 30/2; i++) {
- /* From the USB Audio spec v2.0:
- bmaControls() is a (ch+1)-element array of 4-byte bitmaps,
- each containing a set of bit pairs. If a Control is present,
- it must be Host readable. If a certain Control is not
- present then the bit pair must be set to 0b00.
- If a Control is present but read-only, the bit pair must be
- set to 0b01. If a Control is also Host programmable, the bit
- pair must be set to 0b11. The value 0b10 is not allowed. */
unsigned int ch_bits = 0;
unsigned int ch_read_only = 0;
@@ -1855,13 +1863,13 @@ static int parse_audio_unit(struct mixer_build *state, int unitid)
return parse_audio_selector_unit(state, unitid, p1);
case UAC_FEATURE_UNIT:
return parse_audio_feature_unit(state, unitid, p1);
- case UAC_PROCESSING_UNIT_V1:
+ case UAC1_PROCESSING_UNIT:
/* UAC2_EFFECT_UNIT has the same value */
if (state->mixer->protocol == UAC_VERSION_1)
return parse_audio_processing_unit(state, unitid, p1);
else
return 0; /* FIXME - effect units not implemented yet */
- case UAC_EXTENSION_UNIT_V1:
+ case UAC1_EXTENSION_UNIT:
/* UAC2_PROCESSING_UNIT_V2 has the same value */
if (state->mixer->protocol == UAC_VERSION_1)
return parse_audio_extension_unit(state, unitid, p1);
@@ -1905,7 +1913,7 @@ static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
struct usb_host_interface *hostif;
void *p;
- hostif = &usb_ifnum_to_if(mixer->chip->dev, mixer->ctrlif)->altsetting[0];
+ hostif = mixer->chip->ctrl_intf;
memset(&state, 0, sizeof(state));
state.chip = mixer->chip;
state.mixer = mixer;
@@ -1925,7 +1933,7 @@ static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
p = NULL;
while ((p = snd_usb_find_csint_desc(hostif->extra, hostif->extralen, p, UAC_OUTPUT_TERMINAL)) != NULL) {
if (mixer->protocol == UAC_VERSION_1) {
- struct uac_output_terminal_descriptor_v1 *desc = p;
+ struct uac1_output_terminal_descriptor *desc = p;
if (desc->bLength < sizeof(*desc))
continue; /* invalid descriptor? */
@@ -1997,7 +2005,7 @@ static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
list_for_each_entry(mixer, &chip->mixer_list, list) {
snd_iprintf(buffer,
"USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
- chip->usb_id, mixer->ctrlif,
+ chip->usb_id, snd_usb_ctrl_intf(chip),
mixer->ignore_ctl_error);
snd_iprintf(buffer, "Card: %s\n", chip->card->longname);
for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) {
@@ -2115,7 +2123,7 @@ static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
int buffer_length;
unsigned int epnum;
- hostif = &usb_ifnum_to_if(mixer->chip->dev, mixer->ctrlif)->altsetting[0];
+ hostif = mixer->chip->ctrl_intf;
/* we need one interrupt input endpoint */
if (get_iface_desc(hostif)->bNumEndpoints < 1)
return 0;
@@ -2158,7 +2166,6 @@ int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
if (!mixer)
return -ENOMEM;
mixer->chip = chip;
- mixer->ctrlif = ctrlif;
mixer->ignore_ctl_error = ignore_error;
mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
GFP_KERNEL);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.