![Peter Senna Tschudin](/assets/img/avatar_default.png)
Convert 0 to false and 1 to true when assigning values to bool
variables. Inspired by commit 3db1cd5c05
.
The simplified semantic patch that find this problem is as
follows (http://coccinelle.lip6.fr/):
@@
bool b;
@@
(
-b = 0
+b = false
|
-b = 1
+b = true
)
Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2420 lines
65 KiB
C
2420 lines
65 KiB
C
/*
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* (Tentative) USB Audio Driver for ALSA
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*
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* Mixer control part
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*
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* Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
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*
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* Many codes borrowed from audio.c by
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* Alan Cox (alan@lxorguk.ukuu.org.uk)
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* Thomas Sailer (sailer@ife.ee.ethz.ch)
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/*
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* TODOs, for both the mixer and the streaming interfaces:
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*
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* - support for UAC2 effect units
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* - support for graphical equalizers
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* - RANGE and MEM set commands (UAC2)
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* - RANGE and MEM interrupt dispatchers (UAC2)
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* - audio channel clustering (UAC2)
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* - audio sample rate converter units (UAC2)
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* - proper handling of clock multipliers (UAC2)
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* - dispatch clock change notifications (UAC2)
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* - stop PCM streams which use a clock that became invalid
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* - stop PCM streams which use a clock selector that has changed
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* - parse available sample rates again when clock sources changed
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*/
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#include <linux/bitops.h>
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/usb.h>
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#include <linux/usb/audio.h>
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#include <linux/usb/audio-v2.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#include <sound/hwdep.h>
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#include <sound/info.h>
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#include <sound/tlv.h>
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#include "usbaudio.h"
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#include "mixer.h"
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#include "helper.h"
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#include "mixer_quirks.h"
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#include "power.h"
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#define MAX_ID_ELEMS 256
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struct usb_audio_term {
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int id;
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int type;
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int channels;
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unsigned int chconfig;
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int name;
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};
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struct usbmix_name_map;
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struct mixer_build {
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struct snd_usb_audio *chip;
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struct usb_mixer_interface *mixer;
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unsigned char *buffer;
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unsigned int buflen;
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DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS);
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struct usb_audio_term oterm;
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const struct usbmix_name_map *map;
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const struct usbmix_selector_map *selector_map;
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};
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/*E-mu 0202/0404/0204 eXtension Unit(XU) control*/
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enum {
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USB_XU_CLOCK_RATE = 0xe301,
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USB_XU_CLOCK_SOURCE = 0xe302,
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USB_XU_DIGITAL_IO_STATUS = 0xe303,
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USB_XU_DEVICE_OPTIONS = 0xe304,
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USB_XU_DIRECT_MONITORING = 0xe305,
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USB_XU_METERING = 0xe306
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};
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enum {
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USB_XU_CLOCK_SOURCE_SELECTOR = 0x02, /* clock source*/
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USB_XU_CLOCK_RATE_SELECTOR = 0x03, /* clock rate */
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USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01, /* the spdif format */
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USB_XU_SOFT_LIMIT_SELECTOR = 0x03 /* soft limiter */
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};
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/*
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* manual mapping of mixer names
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* if the mixer topology is too complicated and the parsed names are
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* ambiguous, add the entries in usbmixer_maps.c.
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*/
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#include "mixer_maps.c"
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static const struct usbmix_name_map *
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find_map(struct mixer_build *state, int unitid, int control)
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{
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const struct usbmix_name_map *p = state->map;
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if (!p)
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return NULL;
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for (p = state->map; p->id; p++) {
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if (p->id == unitid &&
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(!control || !p->control || control == p->control))
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return p;
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}
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return NULL;
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}
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/* get the mapped name if the unit matches */
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static int
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check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen)
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{
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if (!p || !p->name)
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return 0;
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buflen--;
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return strlcpy(buf, p->name, buflen);
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}
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/* check whether the control should be ignored */
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static inline int
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check_ignored_ctl(const struct usbmix_name_map *p)
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{
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if (!p || p->name || p->dB)
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return 0;
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return 1;
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}
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/* dB mapping */
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static inline void check_mapped_dB(const struct usbmix_name_map *p,
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struct usb_mixer_elem_info *cval)
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{
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if (p && p->dB) {
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cval->dBmin = p->dB->min;
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cval->dBmax = p->dB->max;
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cval->initialized = 1;
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}
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}
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/* get the mapped selector source name */
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static int check_mapped_selector_name(struct mixer_build *state, int unitid,
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int index, char *buf, int buflen)
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{
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const struct usbmix_selector_map *p;
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if (! state->selector_map)
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return 0;
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for (p = state->selector_map; p->id; p++) {
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if (p->id == unitid && index < p->count)
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return strlcpy(buf, p->names[index], buflen);
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}
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return 0;
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}
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/*
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* find an audio control unit with the given unit id
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*/
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static void *find_audio_control_unit(struct mixer_build *state, unsigned char unit)
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{
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/* we just parse the header */
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struct uac_feature_unit_descriptor *hdr = NULL;
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while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr,
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USB_DT_CS_INTERFACE)) != NULL) {
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if (hdr->bLength >= 4 &&
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hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL &&
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hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER &&
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hdr->bUnitID == unit)
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return hdr;
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}
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return NULL;
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}
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/*
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* copy a string with the given id
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*/
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static int snd_usb_copy_string_desc(struct mixer_build *state, int index, char *buf, int maxlen)
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{
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int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
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buf[len] = 0;
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return len;
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}
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/*
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* convert from the byte/word on usb descriptor to the zero-based integer
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*/
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static int convert_signed_value(struct usb_mixer_elem_info *cval, int val)
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{
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switch (cval->val_type) {
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case USB_MIXER_BOOLEAN:
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return !!val;
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case USB_MIXER_INV_BOOLEAN:
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return !val;
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case USB_MIXER_U8:
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val &= 0xff;
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break;
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case USB_MIXER_S8:
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val &= 0xff;
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if (val >= 0x80)
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val -= 0x100;
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break;
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case USB_MIXER_U16:
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val &= 0xffff;
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break;
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case USB_MIXER_S16:
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val &= 0xffff;
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if (val >= 0x8000)
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val -= 0x10000;
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break;
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}
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return val;
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}
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/*
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* convert from the zero-based int to the byte/word for usb descriptor
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*/
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static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val)
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{
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switch (cval->val_type) {
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case USB_MIXER_BOOLEAN:
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return !!val;
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case USB_MIXER_INV_BOOLEAN:
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return !val;
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case USB_MIXER_S8:
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case USB_MIXER_U8:
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return val & 0xff;
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case USB_MIXER_S16:
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case USB_MIXER_U16:
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return val & 0xffff;
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}
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return 0; /* not reached */
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}
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static int get_relative_value(struct usb_mixer_elem_info *cval, int val)
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{
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if (! cval->res)
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cval->res = 1;
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if (val < cval->min)
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return 0;
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else if (val >= cval->max)
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return (cval->max - cval->min + cval->res - 1) / cval->res;
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else
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return (val - cval->min) / cval->res;
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}
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static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
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{
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if (val < 0)
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return cval->min;
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if (! cval->res)
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cval->res = 1;
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val *= cval->res;
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val += cval->min;
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if (val > cval->max)
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return cval->max;
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return val;
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}
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/*
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* retrieve a mixer value
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*/
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static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
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{
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struct snd_usb_audio *chip = cval->mixer->chip;
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unsigned char buf[2];
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int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
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int timeout = 10;
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int idx = 0, err;
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err = snd_usb_autoresume(cval->mixer->chip);
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if (err < 0)
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return -EIO;
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down_read(&chip->shutdown_rwsem);
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while (timeout-- > 0) {
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if (chip->shutdown)
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break;
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idx = snd_usb_ctrl_intf(chip) | (cval->id << 8);
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if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request,
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USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
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validx, idx, buf, val_len) >= val_len) {
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*value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
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err = 0;
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goto out;
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}
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}
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snd_printdd(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
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request, validx, idx, cval->val_type);
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err = -EINVAL;
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out:
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up_read(&chip->shutdown_rwsem);
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snd_usb_autosuspend(cval->mixer->chip);
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return err;
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}
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static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
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{
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struct snd_usb_audio *chip = cval->mixer->chip;
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unsigned char buf[2 + 3*sizeof(__u16)]; /* enough space for one range */
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unsigned char *val;
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int idx = 0, ret, size;
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__u8 bRequest;
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if (request == UAC_GET_CUR) {
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bRequest = UAC2_CS_CUR;
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size = sizeof(__u16);
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} else {
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bRequest = UAC2_CS_RANGE;
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size = sizeof(buf);
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}
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memset(buf, 0, sizeof(buf));
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ret = snd_usb_autoresume(chip) ? -EIO : 0;
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if (ret)
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goto error;
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down_read(&chip->shutdown_rwsem);
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if (chip->shutdown)
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ret = -ENODEV;
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else {
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idx = snd_usb_ctrl_intf(chip) | (cval->id << 8);
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ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
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USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
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validx, idx, buf, size);
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}
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up_read(&chip->shutdown_rwsem);
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snd_usb_autosuspend(chip);
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if (ret < 0) {
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error:
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snd_printk(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
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request, validx, idx, cval->val_type);
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return ret;
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}
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/* FIXME: how should we handle multiple triplets here? */
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switch (request) {
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case UAC_GET_CUR:
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val = buf;
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break;
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case UAC_GET_MIN:
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val = buf + sizeof(__u16);
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break;
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case UAC_GET_MAX:
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val = buf + sizeof(__u16) * 2;
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break;
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case UAC_GET_RES:
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val = buf + sizeof(__u16) * 3;
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break;
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default:
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return -EINVAL;
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}
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*value_ret = convert_signed_value(cval, snd_usb_combine_bytes(val, sizeof(__u16)));
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return 0;
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}
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static int get_ctl_value(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
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{
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validx += cval->idx_off;
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return (cval->mixer->protocol == UAC_VERSION_1) ?
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get_ctl_value_v1(cval, request, validx, value_ret) :
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get_ctl_value_v2(cval, request, validx, value_ret);
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}
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static int get_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int *value)
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{
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return get_ctl_value(cval, UAC_GET_CUR, validx, value);
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}
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|
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/* channel = 0: master, 1 = first channel */
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static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval,
|
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int channel, int *value)
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{
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return get_ctl_value(cval, UAC_GET_CUR, (cval->control << 8) | channel, value);
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}
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|
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static int get_cur_mix_value(struct usb_mixer_elem_info *cval,
|
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int channel, int index, int *value)
|
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{
|
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int err;
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|
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if (cval->cached & (1 << channel)) {
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*value = cval->cache_val[index];
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return 0;
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}
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err = get_cur_mix_raw(cval, channel, value);
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if (err < 0) {
|
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if (!cval->mixer->ignore_ctl_error)
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snd_printd(KERN_ERR "cannot get current value for control %d ch %d: err = %d\n",
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cval->control, channel, err);
|
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return err;
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}
|
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cval->cached |= 1 << channel;
|
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cval->cache_val[index] = *value;
|
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return 0;
|
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}
|
|
|
|
|
|
/*
|
|
* set a mixer value
|
|
*/
|
|
|
|
int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
|
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int request, int validx, int value_set)
|
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{
|
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struct snd_usb_audio *chip = cval->mixer->chip;
|
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unsigned char buf[2];
|
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int idx = 0, val_len, err, timeout = 10;
|
|
|
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validx += cval->idx_off;
|
|
|
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if (cval->mixer->protocol == UAC_VERSION_1) {
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val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
|
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} else { /* UAC_VERSION_2 */
|
|
/* audio class v2 controls are always 2 bytes in size */
|
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val_len = sizeof(__u16);
|
|
|
|
/* FIXME */
|
|
if (request != UAC_SET_CUR) {
|
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snd_printdd(KERN_WARNING "RANGE setting not yet supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
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request = UAC2_CS_CUR;
|
|
}
|
|
|
|
value_set = convert_bytes_value(cval, value_set);
|
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buf[0] = value_set & 0xff;
|
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buf[1] = (value_set >> 8) & 0xff;
|
|
err = snd_usb_autoresume(chip);
|
|
if (err < 0)
|
|
return -EIO;
|
|
down_read(&chip->shutdown_rwsem);
|
|
while (timeout-- > 0) {
|
|
if (chip->shutdown)
|
|
break;
|
|
idx = snd_usb_ctrl_intf(chip) | (cval->id << 8);
|
|
if (snd_usb_ctl_msg(chip->dev,
|
|
usb_sndctrlpipe(chip->dev, 0), request,
|
|
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
|
|
validx, idx, buf, val_len) >= 0) {
|
|
err = 0;
|
|
goto out;
|
|
}
|
|
}
|
|
snd_printdd(KERN_ERR "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
|
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request, validx, idx, cval->val_type, buf[0], buf[1]);
|
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err = -EINVAL;
|
|
|
|
out:
|
|
up_read(&chip->shutdown_rwsem);
|
|
snd_usb_autosuspend(chip);
|
|
return err;
|
|
}
|
|
|
|
static int set_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int value)
|
|
{
|
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return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value);
|
|
}
|
|
|
|
static int set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
|
|
int index, int value)
|
|
{
|
|
int err;
|
|
unsigned int read_only = (channel == 0) ?
|
|
cval->master_readonly :
|
|
cval->ch_readonly & (1 << (channel - 1));
|
|
|
|
if (read_only) {
|
|
snd_printdd(KERN_INFO "%s(): channel %d of control %d is read_only\n",
|
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__func__, channel, cval->control);
|
|
return 0;
|
|
}
|
|
|
|
err = snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, (cval->control << 8) | channel,
|
|
value);
|
|
if (err < 0)
|
|
return err;
|
|
cval->cached |= 1 << channel;
|
|
cval->cache_val[index] = value;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* TLV callback for mixer volume controls
|
|
*/
|
|
int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
|
|
unsigned int size, unsigned int __user *_tlv)
|
|
{
|
|
struct usb_mixer_elem_info *cval = kcontrol->private_data;
|
|
DECLARE_TLV_DB_MINMAX(scale, 0, 0);
|
|
|
|
if (size < sizeof(scale))
|
|
return -ENOMEM;
|
|
scale[2] = cval->dBmin;
|
|
scale[3] = cval->dBmax;
|
|
if (copy_to_user(_tlv, scale, sizeof(scale)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* parser routines begin here...
|
|
*/
|
|
|
|
static int parse_audio_unit(struct mixer_build *state, int unitid);
|
|
|
|
|
|
/*
|
|
* check if the input/output channel routing is enabled on the given bitmap.
|
|
* used for mixer unit parser
|
|
*/
|
|
static int check_matrix_bitmap(unsigned char *bmap, int ich, int och, int num_outs)
|
|
{
|
|
int idx = ich * num_outs + och;
|
|
return bmap[idx >> 3] & (0x80 >> (idx & 7));
|
|
}
|
|
|
|
|
|
/*
|
|
* add an alsa control element
|
|
* search and increment the index until an empty slot is found.
|
|
*
|
|
* if failed, give up and free the control instance.
|
|
*/
|
|
|
|
int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer,
|
|
struct snd_kcontrol *kctl)
|
|
{
|
|
struct usb_mixer_elem_info *cval = kctl->private_data;
|
|
int err;
|
|
|
|
while (snd_ctl_find_id(mixer->chip->card, &kctl->id))
|
|
kctl->id.index++;
|
|
if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) {
|
|
snd_printd(KERN_ERR "cannot add control (err = %d)\n", err);
|
|
return err;
|
|
}
|
|
cval->elem_id = &kctl->id;
|
|
cval->next_id_elem = mixer->id_elems[cval->id];
|
|
mixer->id_elems[cval->id] = cval;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* get a terminal name string
|
|
*/
|
|
|
|
static struct iterm_name_combo {
|
|
int type;
|
|
char *name;
|
|
} iterm_names[] = {
|
|
{ 0x0300, "Output" },
|
|
{ 0x0301, "Speaker" },
|
|
{ 0x0302, "Headphone" },
|
|
{ 0x0303, "HMD Audio" },
|
|
{ 0x0304, "Desktop Speaker" },
|
|
{ 0x0305, "Room Speaker" },
|
|
{ 0x0306, "Com Speaker" },
|
|
{ 0x0307, "LFE" },
|
|
{ 0x0600, "External In" },
|
|
{ 0x0601, "Analog In" },
|
|
{ 0x0602, "Digital In" },
|
|
{ 0x0603, "Line" },
|
|
{ 0x0604, "Legacy In" },
|
|
{ 0x0605, "IEC958 In" },
|
|
{ 0x0606, "1394 DA Stream" },
|
|
{ 0x0607, "1394 DV Stream" },
|
|
{ 0x0700, "Embedded" },
|
|
{ 0x0701, "Noise Source" },
|
|
{ 0x0702, "Equalization Noise" },
|
|
{ 0x0703, "CD" },
|
|
{ 0x0704, "DAT" },
|
|
{ 0x0705, "DCC" },
|
|
{ 0x0706, "MiniDisk" },
|
|
{ 0x0707, "Analog Tape" },
|
|
{ 0x0708, "Phonograph" },
|
|
{ 0x0709, "VCR Audio" },
|
|
{ 0x070a, "Video Disk Audio" },
|
|
{ 0x070b, "DVD Audio" },
|
|
{ 0x070c, "TV Tuner Audio" },
|
|
{ 0x070d, "Satellite Rec Audio" },
|
|
{ 0x070e, "Cable Tuner Audio" },
|
|
{ 0x070f, "DSS Audio" },
|
|
{ 0x0710, "Radio Receiver" },
|
|
{ 0x0711, "Radio Transmitter" },
|
|
{ 0x0712, "Multi-Track Recorder" },
|
|
{ 0x0713, "Synthesizer" },
|
|
{ 0 },
|
|
};
|
|
|
|
static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm,
|
|
unsigned char *name, int maxlen, int term_only)
|
|
{
|
|
struct iterm_name_combo *names;
|
|
|
|
if (iterm->name)
|
|
return snd_usb_copy_string_desc(state, iterm->name, name, maxlen);
|
|
|
|
/* virtual type - not a real terminal */
|
|
if (iterm->type >> 16) {
|
|
if (term_only)
|
|
return 0;
|
|
switch (iterm->type >> 16) {
|
|
case UAC_SELECTOR_UNIT:
|
|
strcpy(name, "Selector"); return 8;
|
|
case UAC1_PROCESSING_UNIT:
|
|
strcpy(name, "Process Unit"); return 12;
|
|
case UAC1_EXTENSION_UNIT:
|
|
strcpy(name, "Ext Unit"); return 8;
|
|
case UAC_MIXER_UNIT:
|
|
strcpy(name, "Mixer"); return 5;
|
|
default:
|
|
return sprintf(name, "Unit %d", iterm->id);
|
|
}
|
|
}
|
|
|
|
switch (iterm->type & 0xff00) {
|
|
case 0x0100:
|
|
strcpy(name, "PCM"); return 3;
|
|
case 0x0200:
|
|
strcpy(name, "Mic"); return 3;
|
|
case 0x0400:
|
|
strcpy(name, "Headset"); return 7;
|
|
case 0x0500:
|
|
strcpy(name, "Phone"); return 5;
|
|
}
|
|
|
|
for (names = iterm_names; names->type; names++)
|
|
if (names->type == iterm->type) {
|
|
strcpy(name, names->name);
|
|
return strlen(names->name);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* parse the source unit recursively until it reaches to a terminal
|
|
* or a branched unit.
|
|
*/
|
|
static int check_input_term(struct mixer_build *state, int id, struct usb_audio_term *term)
|
|
{
|
|
int err;
|
|
void *p1;
|
|
|
|
memset(term, 0, sizeof(*term));
|
|
while ((p1 = find_audio_control_unit(state, id)) != NULL) {
|
|
unsigned char *hdr = p1;
|
|
term->id = id;
|
|
switch (hdr[2]) {
|
|
case UAC_INPUT_TERMINAL:
|
|
if (state->mixer->protocol == UAC_VERSION_1) {
|
|
struct uac_input_terminal_descriptor *d = p1;
|
|
term->type = le16_to_cpu(d->wTerminalType);
|
|
term->channels = d->bNrChannels;
|
|
term->chconfig = le16_to_cpu(d->wChannelConfig);
|
|
term->name = d->iTerminal;
|
|
} else { /* UAC_VERSION_2 */
|
|
struct uac2_input_terminal_descriptor *d = p1;
|
|
term->type = le16_to_cpu(d->wTerminalType);
|
|
term->channels = d->bNrChannels;
|
|
term->chconfig = le32_to_cpu(d->bmChannelConfig);
|
|
term->name = d->iTerminal;
|
|
|
|
/* call recursively to get the clock selectors */
|
|
err = check_input_term(state, d->bCSourceID, term);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
return 0;
|
|
case UAC_FEATURE_UNIT: {
|
|
/* the header is the same for v1 and v2 */
|
|
struct uac_feature_unit_descriptor *d = p1;
|
|
id = d->bSourceID;
|
|
break; /* continue to parse */
|
|
}
|
|
case UAC_MIXER_UNIT: {
|
|
struct uac_mixer_unit_descriptor *d = p1;
|
|
term->type = d->bDescriptorSubtype << 16; /* virtual type */
|
|
term->channels = uac_mixer_unit_bNrChannels(d);
|
|
term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol);
|
|
term->name = uac_mixer_unit_iMixer(d);
|
|
return 0;
|
|
}
|
|
case UAC_SELECTOR_UNIT:
|
|
case UAC2_CLOCK_SELECTOR: {
|
|
struct uac_selector_unit_descriptor *d = p1;
|
|
/* call recursively to retrieve the channel info */
|
|
err = check_input_term(state, d->baSourceID[0], term);
|
|
if (err < 0)
|
|
return err;
|
|
term->type = d->bDescriptorSubtype << 16; /* virtual type */
|
|
term->id = id;
|
|
term->name = uac_selector_unit_iSelector(d);
|
|
return 0;
|
|
}
|
|
case UAC1_PROCESSING_UNIT:
|
|
case UAC1_EXTENSION_UNIT:
|
|
/* UAC2_PROCESSING_UNIT_V2 */
|
|
/* UAC2_EFFECT_UNIT */
|
|
case UAC2_EXTENSION_UNIT_V2: {
|
|
struct uac_processing_unit_descriptor *d = p1;
|
|
|
|
if (state->mixer->protocol == UAC_VERSION_2 &&
|
|
hdr[2] == UAC2_EFFECT_UNIT) {
|
|
/* UAC2/UAC1 unit IDs overlap here in an
|
|
* uncompatible way. Ignore this unit for now.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
if (d->bNrInPins) {
|
|
id = d->baSourceID[0];
|
|
break; /* continue to parse */
|
|
}
|
|
term->type = d->bDescriptorSubtype << 16; /* virtual type */
|
|
term->channels = uac_processing_unit_bNrChannels(d);
|
|
term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol);
|
|
term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol);
|
|
return 0;
|
|
}
|
|
case UAC2_CLOCK_SOURCE: {
|
|
struct uac_clock_source_descriptor *d = p1;
|
|
term->type = d->bDescriptorSubtype << 16; /* virtual type */
|
|
term->id = id;
|
|
term->name = d->iClockSource;
|
|
return 0;
|
|
}
|
|
default:
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
|
|
|
|
/*
|
|
* Feature Unit
|
|
*/
|
|
|
|
/* feature unit control information */
|
|
struct usb_feature_control_info {
|
|
const char *name;
|
|
unsigned int type; /* control type (mute, volume, etc.) */
|
|
};
|
|
|
|
static struct usb_feature_control_info audio_feature_info[] = {
|
|
{ "Mute", USB_MIXER_INV_BOOLEAN },
|
|
{ "Volume", USB_MIXER_S16 },
|
|
{ "Tone Control - Bass", USB_MIXER_S8 },
|
|
{ "Tone Control - Mid", USB_MIXER_S8 },
|
|
{ "Tone Control - Treble", USB_MIXER_S8 },
|
|
{ "Graphic Equalizer", USB_MIXER_S8 }, /* FIXME: not implemeted yet */
|
|
{ "Auto Gain Control", USB_MIXER_BOOLEAN },
|
|
{ "Delay Control", USB_MIXER_U16 },
|
|
{ "Bass Boost", USB_MIXER_BOOLEAN },
|
|
{ "Loudness", USB_MIXER_BOOLEAN },
|
|
/* UAC2 specific */
|
|
{ "Input Gain Control", USB_MIXER_U16 },
|
|
{ "Input Gain Pad Control", USB_MIXER_BOOLEAN },
|
|
{ "Phase Inverter Control", USB_MIXER_BOOLEAN },
|
|
};
|
|
|
|
|
|
/* private_free callback */
|
|
static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
|
|
{
|
|
kfree(kctl->private_data);
|
|
kctl->private_data = NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
* interface to ALSA control for feature/mixer units
|
|
*/
|
|
|
|
/* volume control quirks */
|
|
static void volume_control_quirks(struct usb_mixer_elem_info *cval,
|
|
struct snd_kcontrol *kctl)
|
|
{
|
|
switch (cval->mixer->chip->usb_id) {
|
|
case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
|
|
case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
|
|
if (strcmp(kctl->id.name, "Effect Duration") == 0) {
|
|
cval->min = 0x0000;
|
|
cval->max = 0xffff;
|
|
cval->res = 0x00e6;
|
|
break;
|
|
}
|
|
if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
|
|
strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
|
|
cval->min = 0x00;
|
|
cval->max = 0xff;
|
|
break;
|
|
}
|
|
if (strstr(kctl->id.name, "Effect Return") != NULL) {
|
|
cval->min = 0xb706;
|
|
cval->max = 0xff7b;
|
|
cval->res = 0x0073;
|
|
break;
|
|
}
|
|
if ((strstr(kctl->id.name, "Playback Volume") != NULL) ||
|
|
(strstr(kctl->id.name, "Effect Send") != NULL)) {
|
|
cval->min = 0xb5fb; /* -73 dB = 0xb6ff */
|
|
cval->max = 0xfcfe;
|
|
cval->res = 0x0073;
|
|
}
|
|
break;
|
|
|
|
case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */
|
|
case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */
|
|
if (strcmp(kctl->id.name, "Effect Duration") == 0) {
|
|
snd_printk(KERN_INFO
|
|
"usb-audio: set quirk for FTU Effect Duration\n");
|
|
cval->min = 0x0000;
|
|
cval->max = 0x7f00;
|
|
cval->res = 0x0100;
|
|
break;
|
|
}
|
|
if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
|
|
strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
|
|
snd_printk(KERN_INFO
|
|
"usb-audio: set quirks for FTU Effect Feedback/Volume\n");
|
|
cval->min = 0x00;
|
|
cval->max = 0x7f;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case USB_ID(0x0471, 0x0101):
|
|
case USB_ID(0x0471, 0x0104):
|
|
case USB_ID(0x0471, 0x0105):
|
|
case USB_ID(0x0672, 0x1041):
|
|
/* quirk for UDA1321/N101.
|
|
* note that detection between firmware 2.1.1.7 (N101)
|
|
* and later 2.1.1.21 is not very clear from datasheets.
|
|
* I hope that the min value is -15360 for newer firmware --jk
|
|
*/
|
|
if (!strcmp(kctl->id.name, "PCM Playback Volume") &&
|
|
cval->min == -15616) {
|
|
snd_printk(KERN_INFO
|
|
"set volume quirk for UDA1321/N101 chip\n");
|
|
cval->max = -256;
|
|
}
|
|
break;
|
|
|
|
case USB_ID(0x046d, 0x09a4):
|
|
if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
|
|
snd_printk(KERN_INFO
|
|
"set volume quirk for QuickCam E3500\n");
|
|
cval->min = 6080;
|
|
cval->max = 8768;
|
|
cval->res = 192;
|
|
}
|
|
break;
|
|
|
|
case USB_ID(0x046d, 0x0808):
|
|
case USB_ID(0x046d, 0x0809):
|
|
case USB_ID(0x046d, 0x081b): /* HD Webcam c310 */
|
|
case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */
|
|
case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */
|
|
case USB_ID(0x046d, 0x0826): /* HD Webcam c525 */
|
|
case USB_ID(0x046d, 0x0991):
|
|
/* Most audio usb devices lie about volume resolution.
|
|
* Most Logitech webcams have res = 384.
|
|
* Proboly there is some logitech magic behind this number --fishor
|
|
*/
|
|
if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
|
|
snd_printk(KERN_INFO
|
|
"set resolution quirk: cval->res = 384\n");
|
|
cval->res = 384;
|
|
}
|
|
break;
|
|
|
|
}
|
|
}
|
|
|
|
/*
|
|
* retrieve the minimum and maximum values for the specified control
|
|
*/
|
|
static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval,
|
|
int default_min, struct snd_kcontrol *kctl)
|
|
{
|
|
/* for failsafe */
|
|
cval->min = default_min;
|
|
cval->max = cval->min + 1;
|
|
cval->res = 1;
|
|
cval->dBmin = cval->dBmax = 0;
|
|
|
|
if (cval->val_type == USB_MIXER_BOOLEAN ||
|
|
cval->val_type == USB_MIXER_INV_BOOLEAN) {
|
|
cval->initialized = 1;
|
|
} else {
|
|
int minchn = 0;
|
|
if (cval->cmask) {
|
|
int i;
|
|
for (i = 0; i < MAX_CHANNELS; i++)
|
|
if (cval->cmask & (1 << i)) {
|
|
minchn = i + 1;
|
|
break;
|
|
}
|
|
}
|
|
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, snd_usb_ctrl_intf(cval->mixer->chip), cval->control, cval->id);
|
|
return -EINVAL;
|
|
}
|
|
if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) {
|
|
cval->res = 1;
|
|
} else {
|
|
int last_valid_res = cval->res;
|
|
|
|
while (cval->res > 1) {
|
|
if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES,
|
|
(cval->control << 8) | minchn, cval->res / 2) < 0)
|
|
break;
|
|
cval->res /= 2;
|
|
}
|
|
if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0)
|
|
cval->res = last_valid_res;
|
|
}
|
|
if (cval->res == 0)
|
|
cval->res = 1;
|
|
|
|
/* Additional checks for the proper resolution
|
|
*
|
|
* Some devices report smaller resolutions than actually
|
|
* reacting. They don't return errors but simply clip
|
|
* to the lower aligned value.
|
|
*/
|
|
if (cval->min + cval->res < cval->max) {
|
|
int last_valid_res = cval->res;
|
|
int saved, test, check;
|
|
get_cur_mix_raw(cval, minchn, &saved);
|
|
for (;;) {
|
|
test = saved;
|
|
if (test < cval->max)
|
|
test += cval->res;
|
|
else
|
|
test -= cval->res;
|
|
if (test < cval->min || test > cval->max ||
|
|
set_cur_mix_value(cval, minchn, 0, test) ||
|
|
get_cur_mix_raw(cval, minchn, &check)) {
|
|
cval->res = last_valid_res;
|
|
break;
|
|
}
|
|
if (test == check)
|
|
break;
|
|
cval->res *= 2;
|
|
}
|
|
set_cur_mix_value(cval, minchn, 0, saved);
|
|
}
|
|
|
|
cval->initialized = 1;
|
|
}
|
|
|
|
if (kctl)
|
|
volume_control_quirks(cval, kctl);
|
|
|
|
/* USB descriptions contain the dB scale in 1/256 dB unit
|
|
* while ALSA TLV contains in 1/100 dB unit
|
|
*/
|
|
cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256;
|
|
cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256;
|
|
if (cval->dBmin > cval->dBmax) {
|
|
/* something is wrong; assume it's either from/to 0dB */
|
|
if (cval->dBmin < 0)
|
|
cval->dBmax = 0;
|
|
else if (cval->dBmin > 0)
|
|
cval->dBmin = 0;
|
|
if (cval->dBmin > cval->dBmax) {
|
|
/* totally crap, return an error */
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define get_min_max(cval, def) get_min_max_with_quirks(cval, def, NULL)
|
|
|
|
/* get a feature/mixer unit info */
|
|
static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
|
|
{
|
|
struct usb_mixer_elem_info *cval = kcontrol->private_data;
|
|
|
|
if (cval->val_type == USB_MIXER_BOOLEAN ||
|
|
cval->val_type == USB_MIXER_INV_BOOLEAN)
|
|
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
|
|
else
|
|
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
|
|
uinfo->count = cval->channels;
|
|
if (cval->val_type == USB_MIXER_BOOLEAN ||
|
|
cval->val_type == USB_MIXER_INV_BOOLEAN) {
|
|
uinfo->value.integer.min = 0;
|
|
uinfo->value.integer.max = 1;
|
|
} else {
|
|
if (!cval->initialized) {
|
|
get_min_max_with_quirks(cval, 0, kcontrol);
|
|
if (cval->initialized && cval->dBmin >= cval->dBmax) {
|
|
kcontrol->vd[0].access &=
|
|
~(SNDRV_CTL_ELEM_ACCESS_TLV_READ |
|
|
SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK);
|
|
snd_ctl_notify(cval->mixer->chip->card,
|
|
SNDRV_CTL_EVENT_MASK_INFO,
|
|
&kcontrol->id);
|
|
}
|
|
}
|
|
uinfo->value.integer.min = 0;
|
|
uinfo->value.integer.max =
|
|
(cval->max - cval->min + cval->res - 1) / cval->res;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* get the current value from feature/mixer unit */
|
|
static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct usb_mixer_elem_info *cval = kcontrol->private_data;
|
|
int c, cnt, val, err;
|
|
|
|
ucontrol->value.integer.value[0] = cval->min;
|
|
if (cval->cmask) {
|
|
cnt = 0;
|
|
for (c = 0; c < MAX_CHANNELS; c++) {
|
|
if (!(cval->cmask & (1 << c)))
|
|
continue;
|
|
err = get_cur_mix_value(cval, c + 1, cnt, &val);
|
|
if (err < 0)
|
|
return cval->mixer->ignore_ctl_error ? 0 : err;
|
|
val = get_relative_value(cval, val);
|
|
ucontrol->value.integer.value[cnt] = val;
|
|
cnt++;
|
|
}
|
|
return 0;
|
|
} else {
|
|
/* master channel */
|
|
err = get_cur_mix_value(cval, 0, 0, &val);
|
|
if (err < 0)
|
|
return cval->mixer->ignore_ctl_error ? 0 : err;
|
|
val = get_relative_value(cval, val);
|
|
ucontrol->value.integer.value[0] = val;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* put the current value to feature/mixer unit */
|
|
static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct usb_mixer_elem_info *cval = kcontrol->private_data;
|
|
int c, cnt, val, oval, err;
|
|
int changed = 0;
|
|
|
|
if (cval->cmask) {
|
|
cnt = 0;
|
|
for (c = 0; c < MAX_CHANNELS; c++) {
|
|
if (!(cval->cmask & (1 << c)))
|
|
continue;
|
|
err = get_cur_mix_value(cval, c + 1, cnt, &oval);
|
|
if (err < 0)
|
|
return cval->mixer->ignore_ctl_error ? 0 : err;
|
|
val = ucontrol->value.integer.value[cnt];
|
|
val = get_abs_value(cval, val);
|
|
if (oval != val) {
|
|
set_cur_mix_value(cval, c + 1, cnt, val);
|
|
changed = 1;
|
|
}
|
|
cnt++;
|
|
}
|
|
} else {
|
|
/* master channel */
|
|
err = get_cur_mix_value(cval, 0, 0, &oval);
|
|
if (err < 0)
|
|
return cval->mixer->ignore_ctl_error ? 0 : err;
|
|
val = ucontrol->value.integer.value[0];
|
|
val = get_abs_value(cval, val);
|
|
if (val != oval) {
|
|
set_cur_mix_value(cval, 0, 0, val);
|
|
changed = 1;
|
|
}
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
static struct snd_kcontrol_new usb_feature_unit_ctl = {
|
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
|
|
.name = "", /* will be filled later manually */
|
|
.info = mixer_ctl_feature_info,
|
|
.get = mixer_ctl_feature_get,
|
|
.put = mixer_ctl_feature_put,
|
|
};
|
|
|
|
/* the read-only variant */
|
|
static struct snd_kcontrol_new usb_feature_unit_ctl_ro = {
|
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
|
|
.name = "", /* will be filled later manually */
|
|
.info = mixer_ctl_feature_info,
|
|
.get = mixer_ctl_feature_get,
|
|
.put = NULL,
|
|
};
|
|
|
|
/* This symbol is exported in order to allow the mixer quirks to
|
|
* hook up to the standard feature unit control mechanism */
|
|
struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl;
|
|
|
|
/*
|
|
* build a feature control
|
|
*/
|
|
|
|
static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str)
|
|
{
|
|
return strlcat(kctl->id.name, str, sizeof(kctl->id.name));
|
|
}
|
|
|
|
/* A lot of headsets/headphones have a "Speaker" mixer. Make sure we
|
|
rename it to "Headphone". We determine if something is a headphone
|
|
similar to how udev determines form factor. */
|
|
static void check_no_speaker_on_headset(struct snd_kcontrol *kctl,
|
|
struct snd_card *card)
|
|
{
|
|
const char *names_to_check[] = {
|
|
"Headset", "headset", "Headphone", "headphone", NULL};
|
|
const char **s;
|
|
bool found = false;
|
|
|
|
if (strcmp("Speaker", kctl->id.name))
|
|
return;
|
|
|
|
for (s = names_to_check; *s; s++)
|
|
if (strstr(card->shortname, *s)) {
|
|
found = true;
|
|
break;
|
|
}
|
|
|
|
if (!found)
|
|
return;
|
|
|
|
strlcpy(kctl->id.name, "Headphone", sizeof(kctl->id.name));
|
|
}
|
|
|
|
static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
|
|
unsigned int ctl_mask, int control,
|
|
struct usb_audio_term *iterm, int unitid,
|
|
int readonly_mask)
|
|
{
|
|
struct uac_feature_unit_descriptor *desc = raw_desc;
|
|
unsigned int len = 0;
|
|
int mapped_name = 0;
|
|
int nameid = uac_feature_unit_iFeature(desc);
|
|
struct snd_kcontrol *kctl;
|
|
struct usb_mixer_elem_info *cval;
|
|
const struct usbmix_name_map *map;
|
|
unsigned int range;
|
|
|
|
control++; /* change from zero-based to 1-based value */
|
|
|
|
if (control == UAC_FU_GRAPHIC_EQUALIZER) {
|
|
/* FIXME: not supported yet */
|
|
return;
|
|
}
|
|
|
|
map = find_map(state, unitid, control);
|
|
if (check_ignored_ctl(map))
|
|
return;
|
|
|
|
cval = kzalloc(sizeof(*cval), GFP_KERNEL);
|
|
if (! cval) {
|
|
snd_printk(KERN_ERR "cannot malloc kcontrol\n");
|
|
return;
|
|
}
|
|
cval->mixer = state->mixer;
|
|
cval->id = unitid;
|
|
cval->control = control;
|
|
cval->cmask = ctl_mask;
|
|
cval->val_type = audio_feature_info[control-1].type;
|
|
if (ctl_mask == 0) {
|
|
cval->channels = 1; /* master channel */
|
|
cval->master_readonly = readonly_mask;
|
|
} else {
|
|
int i, c = 0;
|
|
for (i = 0; i < 16; i++)
|
|
if (ctl_mask & (1 << i))
|
|
c++;
|
|
cval->channels = c;
|
|
cval->ch_readonly = readonly_mask;
|
|
}
|
|
|
|
/* if all channels in the mask are marked read-only, make the control
|
|
* read-only. set_cur_mix_value() will check the mask again and won't
|
|
* issue write commands to read-only channels. */
|
|
if (cval->channels == readonly_mask)
|
|
kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval);
|
|
else
|
|
kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
|
|
|
|
if (! kctl) {
|
|
snd_printk(KERN_ERR "cannot malloc kcontrol\n");
|
|
kfree(cval);
|
|
return;
|
|
}
|
|
kctl->private_free = usb_mixer_elem_free;
|
|
|
|
len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
|
|
mapped_name = len != 0;
|
|
if (! len && nameid)
|
|
len = snd_usb_copy_string_desc(state, nameid,
|
|
kctl->id.name, sizeof(kctl->id.name));
|
|
|
|
switch (control) {
|
|
case UAC_FU_MUTE:
|
|
case UAC_FU_VOLUME:
|
|
/* determine the control name. the rule is:
|
|
* - if a name id is given in descriptor, use it.
|
|
* - if the connected input can be determined, then use the name
|
|
* of terminal type.
|
|
* - if the connected output can be determined, use it.
|
|
* - otherwise, anonymous name.
|
|
*/
|
|
if (! len) {
|
|
len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 1);
|
|
if (! len)
|
|
len = get_term_name(state, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 1);
|
|
if (! len)
|
|
len = snprintf(kctl->id.name, sizeof(kctl->id.name),
|
|
"Feature %d", unitid);
|
|
}
|
|
|
|
if (!mapped_name)
|
|
check_no_speaker_on_headset(kctl, state->mixer->chip->card);
|
|
|
|
/* determine the stream direction:
|
|
* if the connected output is USB stream, then it's likely a
|
|
* capture stream. otherwise it should be playback (hopefully :)
|
|
*/
|
|
if (! mapped_name && ! (state->oterm.type >> 16)) {
|
|
if ((state->oterm.type & 0xff00) == 0x0100) {
|
|
len = append_ctl_name(kctl, " Capture");
|
|
} else {
|
|
len = append_ctl_name(kctl, " Playback");
|
|
}
|
|
}
|
|
append_ctl_name(kctl, control == UAC_FU_MUTE ?
|
|
" Switch" : " Volume");
|
|
break;
|
|
default:
|
|
if (! len)
|
|
strlcpy(kctl->id.name, audio_feature_info[control-1].name,
|
|
sizeof(kctl->id.name));
|
|
break;
|
|
}
|
|
|
|
/* get min/max values */
|
|
get_min_max_with_quirks(cval, 0, kctl);
|
|
|
|
if (control == UAC_FU_VOLUME) {
|
|
check_mapped_dB(map, cval);
|
|
if (cval->dBmin < cval->dBmax || !cval->initialized) {
|
|
kctl->tlv.c = snd_usb_mixer_vol_tlv;
|
|
kctl->vd[0].access |=
|
|
SNDRV_CTL_ELEM_ACCESS_TLV_READ |
|
|
SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
|
|
}
|
|
}
|
|
|
|
range = (cval->max - cval->min) / cval->res;
|
|
/* Are there devices with volume range more than 255? I use a bit more
|
|
* to be sure. 384 is a resolution magic number found on Logitech
|
|
* devices. It will definitively catch all buggy Logitech devices.
|
|
*/
|
|
if (range > 384) {
|
|
snd_printk(KERN_WARNING "usb_audio: Warning! Unlikely big "
|
|
"volume range (=%u), cval->res is probably wrong.",
|
|
range);
|
|
snd_printk(KERN_WARNING "usb_audio: [%d] FU [%s] ch = %d, "
|
|
"val = %d/%d/%d", cval->id,
|
|
kctl->id.name, cval->channels,
|
|
cval->min, cval->max, cval->res);
|
|
}
|
|
|
|
snd_printdd(KERN_INFO "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
|
|
cval->id, kctl->id.name, cval->channels, cval->min, cval->max, cval->res);
|
|
snd_usb_mixer_add_control(state->mixer, kctl);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* parse a feature unit
|
|
*
|
|
* most of controls are defined here.
|
|
*/
|
|
static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void *_ftr)
|
|
{
|
|
int channels, i, j;
|
|
struct usb_audio_term iterm;
|
|
unsigned int master_bits, first_ch_bits;
|
|
int err, csize;
|
|
struct uac_feature_unit_descriptor *hdr = _ftr;
|
|
__u8 *bmaControls;
|
|
|
|
if (state->mixer->protocol == UAC_VERSION_1) {
|
|
csize = hdr->bControlSize;
|
|
if (!csize) {
|
|
snd_printdd(KERN_ERR "usbaudio: unit %u: "
|
|
"invalid bControlSize == 0\n", unitid);
|
|
return -EINVAL;
|
|
}
|
|
channels = (hdr->bLength - 7) / csize - 1;
|
|
bmaControls = hdr->bmaControls;
|
|
if (hdr->bLength < 7 + csize) {
|
|
snd_printk(KERN_ERR "usbaudio: unit %u: "
|
|
"invalid UAC_FEATURE_UNIT descriptor\n",
|
|
unitid);
|
|
return -EINVAL;
|
|
}
|
|
} else {
|
|
struct uac2_feature_unit_descriptor *ftr = _ftr;
|
|
csize = 4;
|
|
channels = (hdr->bLength - 6) / 4 - 1;
|
|
bmaControls = ftr->bmaControls;
|
|
if (hdr->bLength < 6 + csize) {
|
|
snd_printk(KERN_ERR "usbaudio: unit %u: "
|
|
"invalid UAC_FEATURE_UNIT descriptor\n",
|
|
unitid);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* parse the source unit */
|
|
if ((err = parse_audio_unit(state, hdr->bSourceID)) < 0)
|
|
return err;
|
|
|
|
/* determine the input source type and name */
|
|
err = check_input_term(state, hdr->bSourceID, &iterm);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
master_bits = snd_usb_combine_bytes(bmaControls, csize);
|
|
/* master configuration quirks */
|
|
switch (state->chip->usb_id) {
|
|
case USB_ID(0x08bb, 0x2702):
|
|
snd_printk(KERN_INFO
|
|
"usbmixer: master volume quirk for PCM2702 chip\n");
|
|
/* disable non-functional volume control */
|
|
master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME);
|
|
break;
|
|
case USB_ID(0x1130, 0xf211):
|
|
snd_printk(KERN_INFO
|
|
"usbmixer: volume control quirk for Tenx TP6911 Audio Headset\n");
|
|
/* disable non-functional volume control */
|
|
channels = 0;
|
|
break;
|
|
|
|
}
|
|
if (channels > 0)
|
|
first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize);
|
|
else
|
|
first_ch_bits = 0;
|
|
|
|
if (state->mixer->protocol == UAC_VERSION_1) {
|
|
/* check all control types */
|
|
for (i = 0; i < 10; i++) {
|
|
unsigned int ch_bits = 0;
|
|
for (j = 0; j < channels; j++) {
|
|
unsigned int mask = snd_usb_combine_bytes(bmaControls + csize * (j+1), csize);
|
|
if (mask & (1 << i))
|
|
ch_bits |= (1 << j);
|
|
}
|
|
/* audio class v1 controls are never read-only */
|
|
if (ch_bits & 1) /* the first channel must be set (for ease of programming) */
|
|
build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, 0);
|
|
if (master_bits & (1 << i))
|
|
build_feature_ctl(state, _ftr, 0, i, &iterm, unitid, 0);
|
|
}
|
|
} else { /* UAC_VERSION_2 */
|
|
for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) {
|
|
unsigned int ch_bits = 0;
|
|
unsigned int ch_read_only = 0;
|
|
|
|
for (j = 0; j < channels; j++) {
|
|
unsigned int mask = snd_usb_combine_bytes(bmaControls + csize * (j+1), csize);
|
|
if (uac2_control_is_readable(mask, i)) {
|
|
ch_bits |= (1 << j);
|
|
if (!uac2_control_is_writeable(mask, i))
|
|
ch_read_only |= (1 << j);
|
|
}
|
|
}
|
|
|
|
/* NOTE: build_feature_ctl() will mark the control read-only if all channels
|
|
* are marked read-only in the descriptors. Otherwise, the control will be
|
|
* reported as writeable, but the driver will not actually issue a write
|
|
* command for read-only channels */
|
|
if (ch_bits & 1) /* the first channel must be set (for ease of programming) */
|
|
build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, ch_read_only);
|
|
if (uac2_control_is_readable(master_bits, i))
|
|
build_feature_ctl(state, _ftr, 0, i, &iterm, unitid,
|
|
!uac2_control_is_writeable(master_bits, i));
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Mixer Unit
|
|
*/
|
|
|
|
/*
|
|
* build a mixer unit control
|
|
*
|
|
* the callbacks are identical with feature unit.
|
|
* input channel number (zero based) is given in control field instead.
|
|
*/
|
|
|
|
static void build_mixer_unit_ctl(struct mixer_build *state,
|
|
struct uac_mixer_unit_descriptor *desc,
|
|
int in_pin, int in_ch, int unitid,
|
|
struct usb_audio_term *iterm)
|
|
{
|
|
struct usb_mixer_elem_info *cval;
|
|
unsigned int num_outs = uac_mixer_unit_bNrChannels(desc);
|
|
unsigned int i, len;
|
|
struct snd_kcontrol *kctl;
|
|
const struct usbmix_name_map *map;
|
|
|
|
map = find_map(state, unitid, 0);
|
|
if (check_ignored_ctl(map))
|
|
return;
|
|
|
|
cval = kzalloc(sizeof(*cval), GFP_KERNEL);
|
|
if (! cval)
|
|
return;
|
|
|
|
cval->mixer = state->mixer;
|
|
cval->id = unitid;
|
|
cval->control = in_ch + 1; /* based on 1 */
|
|
cval->val_type = USB_MIXER_S16;
|
|
for (i = 0; i < num_outs; i++) {
|
|
if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc, state->mixer->protocol), in_ch, i, num_outs)) {
|
|
cval->cmask |= (1 << i);
|
|
cval->channels++;
|
|
}
|
|
}
|
|
|
|
/* get min/max values */
|
|
get_min_max(cval, 0);
|
|
|
|
kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
|
|
if (! kctl) {
|
|
snd_printk(KERN_ERR "cannot malloc kcontrol\n");
|
|
kfree(cval);
|
|
return;
|
|
}
|
|
kctl->private_free = usb_mixer_elem_free;
|
|
|
|
len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
|
|
if (! len)
|
|
len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 0);
|
|
if (! len)
|
|
len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
|
|
append_ctl_name(kctl, " Volume");
|
|
|
|
snd_printdd(KERN_INFO "[%d] MU [%s] ch = %d, val = %d/%d\n",
|
|
cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
|
|
snd_usb_mixer_add_control(state->mixer, kctl);
|
|
}
|
|
|
|
|
|
/*
|
|
* parse a mixer unit
|
|
*/
|
|
static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, void *raw_desc)
|
|
{
|
|
struct uac_mixer_unit_descriptor *desc = raw_desc;
|
|
struct usb_audio_term iterm;
|
|
int input_pins, num_ins, num_outs;
|
|
int pin, ich, err;
|
|
|
|
if (desc->bLength < 11 || ! (input_pins = desc->bNrInPins) || ! (num_outs = uac_mixer_unit_bNrChannels(desc))) {
|
|
snd_printk(KERN_ERR "invalid MIXER UNIT descriptor %d\n", unitid);
|
|
return -EINVAL;
|
|
}
|
|
/* no bmControls field (e.g. Maya44) -> ignore */
|
|
if (desc->bLength <= 10 + input_pins) {
|
|
snd_printdd(KERN_INFO "MU %d has no bmControls field\n", unitid);
|
|
return 0;
|
|
}
|
|
|
|
num_ins = 0;
|
|
ich = 0;
|
|
for (pin = 0; pin < input_pins; pin++) {
|
|
err = parse_audio_unit(state, desc->baSourceID[pin]);
|
|
if (err < 0)
|
|
continue;
|
|
err = check_input_term(state, desc->baSourceID[pin], &iterm);
|
|
if (err < 0)
|
|
return err;
|
|
num_ins += iterm.channels;
|
|
for (; ich < num_ins; ++ich) {
|
|
int och, ich_has_controls = 0;
|
|
|
|
for (och = 0; och < num_outs; ++och) {
|
|
if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc, state->mixer->protocol),
|
|
ich, och, num_outs)) {
|
|
ich_has_controls = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (ich_has_controls)
|
|
build_mixer_unit_ctl(state, desc, pin, ich,
|
|
unitid, &iterm);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Processing Unit / Extension Unit
|
|
*/
|
|
|
|
/* get callback for processing/extension unit */
|
|
static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct usb_mixer_elem_info *cval = kcontrol->private_data;
|
|
int err, val;
|
|
|
|
err = get_cur_ctl_value(cval, cval->control << 8, &val);
|
|
if (err < 0 && cval->mixer->ignore_ctl_error) {
|
|
ucontrol->value.integer.value[0] = cval->min;
|
|
return 0;
|
|
}
|
|
if (err < 0)
|
|
return err;
|
|
val = get_relative_value(cval, val);
|
|
ucontrol->value.integer.value[0] = val;
|
|
return 0;
|
|
}
|
|
|
|
/* put callback for processing/extension unit */
|
|
static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct usb_mixer_elem_info *cval = kcontrol->private_data;
|
|
int val, oval, err;
|
|
|
|
err = get_cur_ctl_value(cval, cval->control << 8, &oval);
|
|
if (err < 0) {
|
|
if (cval->mixer->ignore_ctl_error)
|
|
return 0;
|
|
return err;
|
|
}
|
|
val = ucontrol->value.integer.value[0];
|
|
val = get_abs_value(cval, val);
|
|
if (val != oval) {
|
|
set_cur_ctl_value(cval, cval->control << 8, val);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* alsa control interface for processing/extension unit */
|
|
static struct snd_kcontrol_new mixer_procunit_ctl = {
|
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
|
|
.name = "", /* will be filled later */
|
|
.info = mixer_ctl_feature_info,
|
|
.get = mixer_ctl_procunit_get,
|
|
.put = mixer_ctl_procunit_put,
|
|
};
|
|
|
|
|
|
/*
|
|
* predefined data for processing units
|
|
*/
|
|
struct procunit_value_info {
|
|
int control;
|
|
char *suffix;
|
|
int val_type;
|
|
int min_value;
|
|
};
|
|
|
|
struct procunit_info {
|
|
int type;
|
|
char *name;
|
|
struct procunit_value_info *values;
|
|
};
|
|
|
|
static struct procunit_value_info updown_proc_info[] = {
|
|
{ UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN },
|
|
{ UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
|
|
{ 0 }
|
|
};
|
|
static struct procunit_value_info prologic_proc_info[] = {
|
|
{ UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN },
|
|
{ UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
|
|
{ 0 }
|
|
};
|
|
static struct procunit_value_info threed_enh_proc_info[] = {
|
|
{ UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN },
|
|
{ UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 },
|
|
{ 0 }
|
|
};
|
|
static struct procunit_value_info reverb_proc_info[] = {
|
|
{ UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN },
|
|
{ UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
|
|
{ UAC_REVERB_TIME, "Time", USB_MIXER_U16 },
|
|
{ UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 },
|
|
{ 0 }
|
|
};
|
|
static struct procunit_value_info chorus_proc_info[] = {
|
|
{ UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN },
|
|
{ UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
|
|
{ UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
|
|
{ UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
|
|
{ 0 }
|
|
};
|
|
static struct procunit_value_info dcr_proc_info[] = {
|
|
{ UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN },
|
|
{ UAC_DCR_RATE, "Ratio", USB_MIXER_U16 },
|
|
{ UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 },
|
|
{ UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 },
|
|
{ UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 },
|
|
{ UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 },
|
|
{ 0 }
|
|
};
|
|
|
|
static struct procunit_info procunits[] = {
|
|
{ UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info },
|
|
{ UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info },
|
|
{ UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info },
|
|
{ UAC_PROCESS_REVERB, "Reverb", reverb_proc_info },
|
|
{ UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info },
|
|
{ UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info },
|
|
{ 0 },
|
|
};
|
|
/*
|
|
* predefined data for extension units
|
|
*/
|
|
static struct procunit_value_info clock_rate_xu_info[] = {
|
|
{ USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 },
|
|
{ 0 }
|
|
};
|
|
static struct procunit_value_info clock_source_xu_info[] = {
|
|
{ USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN },
|
|
{ 0 }
|
|
};
|
|
static struct procunit_value_info spdif_format_xu_info[] = {
|
|
{ USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN },
|
|
{ 0 }
|
|
};
|
|
static struct procunit_value_info soft_limit_xu_info[] = {
|
|
{ USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN },
|
|
{ 0 }
|
|
};
|
|
static struct procunit_info extunits[] = {
|
|
{ USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info },
|
|
{ USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info },
|
|
{ USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info },
|
|
{ USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info },
|
|
{ 0 }
|
|
};
|
|
/*
|
|
* build a processing/extension unit
|
|
*/
|
|
static int build_audio_procunit(struct mixer_build *state, int unitid, void *raw_desc, struct procunit_info *list, char *name)
|
|
{
|
|
struct uac_processing_unit_descriptor *desc = raw_desc;
|
|
int num_ins = desc->bNrInPins;
|
|
struct usb_mixer_elem_info *cval;
|
|
struct snd_kcontrol *kctl;
|
|
int i, err, nameid, type, len;
|
|
struct procunit_info *info;
|
|
struct procunit_value_info *valinfo;
|
|
const struct usbmix_name_map *map;
|
|
static struct procunit_value_info default_value_info[] = {
|
|
{ 0x01, "Switch", USB_MIXER_BOOLEAN },
|
|
{ 0 }
|
|
};
|
|
static struct procunit_info default_info = {
|
|
0, NULL, default_value_info
|
|
};
|
|
|
|
if (desc->bLength < 13 || desc->bLength < 13 + num_ins ||
|
|
desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) {
|
|
snd_printk(KERN_ERR "invalid %s descriptor (id %d)\n", name, unitid);
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (i = 0; i < num_ins; i++) {
|
|
if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
|
|
return err;
|
|
}
|
|
|
|
type = le16_to_cpu(desc->wProcessType);
|
|
for (info = list; info && info->type; info++)
|
|
if (info->type == type)
|
|
break;
|
|
if (! info || ! info->type)
|
|
info = &default_info;
|
|
|
|
for (valinfo = info->values; valinfo->control; valinfo++) {
|
|
__u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol);
|
|
|
|
if (! (controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1))))
|
|
continue;
|
|
map = find_map(state, unitid, valinfo->control);
|
|
if (check_ignored_ctl(map))
|
|
continue;
|
|
cval = kzalloc(sizeof(*cval), GFP_KERNEL);
|
|
if (! cval) {
|
|
snd_printk(KERN_ERR "cannot malloc kcontrol\n");
|
|
return -ENOMEM;
|
|
}
|
|
cval->mixer = state->mixer;
|
|
cval->id = unitid;
|
|
cval->control = valinfo->control;
|
|
cval->val_type = valinfo->val_type;
|
|
cval->channels = 1;
|
|
|
|
/* get min/max values */
|
|
if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) {
|
|
__u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol);
|
|
/* FIXME: hard-coded */
|
|
cval->min = 1;
|
|
cval->max = control_spec[0];
|
|
cval->res = 1;
|
|
cval->initialized = 1;
|
|
} else {
|
|
if (type == USB_XU_CLOCK_RATE) {
|
|
/* E-Mu USB 0404/0202/TrackerPre/0204
|
|
* samplerate control quirk
|
|
*/
|
|
cval->min = 0;
|
|
cval->max = 5;
|
|
cval->res = 1;
|
|
cval->initialized = 1;
|
|
} else
|
|
get_min_max(cval, valinfo->min_value);
|
|
}
|
|
|
|
kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
|
|
if (! kctl) {
|
|
snd_printk(KERN_ERR "cannot malloc kcontrol\n");
|
|
kfree(cval);
|
|
return -ENOMEM;
|
|
}
|
|
kctl->private_free = usb_mixer_elem_free;
|
|
|
|
if (check_mapped_name(map, kctl->id.name,
|
|
sizeof(kctl->id.name)))
|
|
/* nothing */ ;
|
|
else if (info->name)
|
|
strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
|
|
else {
|
|
nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol);
|
|
len = 0;
|
|
if (nameid)
|
|
len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
|
|
if (! len)
|
|
strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
|
|
}
|
|
append_ctl_name(kctl, " ");
|
|
append_ctl_name(kctl, valinfo->suffix);
|
|
|
|
snd_printdd(KERN_INFO "[%d] PU [%s] ch = %d, val = %d/%d\n",
|
|
cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
|
|
if ((err = snd_usb_mixer_add_control(state->mixer, kctl)) < 0)
|
|
return err;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int parse_audio_processing_unit(struct mixer_build *state, int unitid, void *raw_desc)
|
|
{
|
|
return build_audio_procunit(state, unitid, raw_desc, procunits, "Processing Unit");
|
|
}
|
|
|
|
static int parse_audio_extension_unit(struct mixer_build *state, int unitid, void *raw_desc)
|
|
{
|
|
/* Note that we parse extension units with processing unit descriptors.
|
|
* That's ok as the layout is the same */
|
|
return build_audio_procunit(state, unitid, raw_desc, extunits, "Extension Unit");
|
|
}
|
|
|
|
|
|
/*
|
|
* Selector Unit
|
|
*/
|
|
|
|
/* info callback for selector unit
|
|
* use an enumerator type for routing
|
|
*/
|
|
static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
|
|
{
|
|
struct usb_mixer_elem_info *cval = kcontrol->private_data;
|
|
const char **itemlist = (const char **)kcontrol->private_value;
|
|
|
|
if (snd_BUG_ON(!itemlist))
|
|
return -EINVAL;
|
|
return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist);
|
|
}
|
|
|
|
/* get callback for selector unit */
|
|
static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct usb_mixer_elem_info *cval = kcontrol->private_data;
|
|
int val, err;
|
|
|
|
err = get_cur_ctl_value(cval, cval->control << 8, &val);
|
|
if (err < 0) {
|
|
if (cval->mixer->ignore_ctl_error) {
|
|
ucontrol->value.enumerated.item[0] = 0;
|
|
return 0;
|
|
}
|
|
return err;
|
|
}
|
|
val = get_relative_value(cval, val);
|
|
ucontrol->value.enumerated.item[0] = val;
|
|
return 0;
|
|
}
|
|
|
|
/* put callback for selector unit */
|
|
static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct usb_mixer_elem_info *cval = kcontrol->private_data;
|
|
int val, oval, err;
|
|
|
|
err = get_cur_ctl_value(cval, cval->control << 8, &oval);
|
|
if (err < 0) {
|
|
if (cval->mixer->ignore_ctl_error)
|
|
return 0;
|
|
return err;
|
|
}
|
|
val = ucontrol->value.enumerated.item[0];
|
|
val = get_abs_value(cval, val);
|
|
if (val != oval) {
|
|
set_cur_ctl_value(cval, cval->control << 8, val);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* alsa control interface for selector unit */
|
|
static struct snd_kcontrol_new mixer_selectunit_ctl = {
|
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
|
|
.name = "", /* will be filled later */
|
|
.info = mixer_ctl_selector_info,
|
|
.get = mixer_ctl_selector_get,
|
|
.put = mixer_ctl_selector_put,
|
|
};
|
|
|
|
|
|
/* private free callback.
|
|
* free both private_data and private_value
|
|
*/
|
|
static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl)
|
|
{
|
|
int i, num_ins = 0;
|
|
|
|
if (kctl->private_data) {
|
|
struct usb_mixer_elem_info *cval = kctl->private_data;
|
|
num_ins = cval->max;
|
|
kfree(cval);
|
|
kctl->private_data = NULL;
|
|
}
|
|
if (kctl->private_value) {
|
|
char **itemlist = (char **)kctl->private_value;
|
|
for (i = 0; i < num_ins; i++)
|
|
kfree(itemlist[i]);
|
|
kfree(itemlist);
|
|
kctl->private_value = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* parse a selector unit
|
|
*/
|
|
static int parse_audio_selector_unit(struct mixer_build *state, int unitid, void *raw_desc)
|
|
{
|
|
struct uac_selector_unit_descriptor *desc = raw_desc;
|
|
unsigned int i, nameid, len;
|
|
int err;
|
|
struct usb_mixer_elem_info *cval;
|
|
struct snd_kcontrol *kctl;
|
|
const struct usbmix_name_map *map;
|
|
char **namelist;
|
|
|
|
if (!desc->bNrInPins || desc->bLength < 5 + desc->bNrInPins) {
|
|
snd_printk(KERN_ERR "invalid SELECTOR UNIT descriptor %d\n", unitid);
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (i = 0; i < desc->bNrInPins; i++) {
|
|
if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
|
|
return err;
|
|
}
|
|
|
|
if (desc->bNrInPins == 1) /* only one ? nonsense! */
|
|
return 0;
|
|
|
|
map = find_map(state, unitid, 0);
|
|
if (check_ignored_ctl(map))
|
|
return 0;
|
|
|
|
cval = kzalloc(sizeof(*cval), GFP_KERNEL);
|
|
if (! cval) {
|
|
snd_printk(KERN_ERR "cannot malloc kcontrol\n");
|
|
return -ENOMEM;
|
|
}
|
|
cval->mixer = state->mixer;
|
|
cval->id = unitid;
|
|
cval->val_type = USB_MIXER_U8;
|
|
cval->channels = 1;
|
|
cval->min = 1;
|
|
cval->max = desc->bNrInPins;
|
|
cval->res = 1;
|
|
cval->initialized = 1;
|
|
|
|
if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
|
|
cval->control = UAC2_CX_CLOCK_SELECTOR;
|
|
else
|
|
cval->control = 0;
|
|
|
|
namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL);
|
|
if (! namelist) {
|
|
snd_printk(KERN_ERR "cannot malloc\n");
|
|
kfree(cval);
|
|
return -ENOMEM;
|
|
}
|
|
#define MAX_ITEM_NAME_LEN 64
|
|
for (i = 0; i < desc->bNrInPins; i++) {
|
|
struct usb_audio_term iterm;
|
|
len = 0;
|
|
namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
|
|
if (! namelist[i]) {
|
|
snd_printk(KERN_ERR "cannot malloc\n");
|
|
while (i--)
|
|
kfree(namelist[i]);
|
|
kfree(namelist);
|
|
kfree(cval);
|
|
return -ENOMEM;
|
|
}
|
|
len = check_mapped_selector_name(state, unitid, i, namelist[i],
|
|
MAX_ITEM_NAME_LEN);
|
|
if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0)
|
|
len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0);
|
|
if (! len)
|
|
sprintf(namelist[i], "Input %d", i);
|
|
}
|
|
|
|
kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
|
|
if (! kctl) {
|
|
snd_printk(KERN_ERR "cannot malloc kcontrol\n");
|
|
kfree(namelist);
|
|
kfree(cval);
|
|
return -ENOMEM;
|
|
}
|
|
kctl->private_value = (unsigned long)namelist;
|
|
kctl->private_free = usb_mixer_selector_elem_free;
|
|
|
|
nameid = uac_selector_unit_iSelector(desc);
|
|
len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
|
|
if (len)
|
|
;
|
|
else if (nameid)
|
|
snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
|
|
else {
|
|
len = get_term_name(state, &state->oterm,
|
|
kctl->id.name, sizeof(kctl->id.name), 0);
|
|
if (! len)
|
|
strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
|
|
|
|
if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
|
|
append_ctl_name(kctl, " Clock Source");
|
|
else if ((state->oterm.type & 0xff00) == 0x0100)
|
|
append_ctl_name(kctl, " Capture Source");
|
|
else
|
|
append_ctl_name(kctl, " Playback Source");
|
|
}
|
|
|
|
snd_printdd(KERN_INFO "[%d] SU [%s] items = %d\n",
|
|
cval->id, kctl->id.name, desc->bNrInPins);
|
|
if ((err = snd_usb_mixer_add_control(state->mixer, kctl)) < 0)
|
|
return err;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* parse an audio unit recursively
|
|
*/
|
|
|
|
static int parse_audio_unit(struct mixer_build *state, int unitid)
|
|
{
|
|
unsigned char *p1;
|
|
|
|
if (test_and_set_bit(unitid, state->unitbitmap))
|
|
return 0; /* the unit already visited */
|
|
|
|
p1 = find_audio_control_unit(state, unitid);
|
|
if (!p1) {
|
|
snd_printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (p1[2]) {
|
|
case UAC_INPUT_TERMINAL:
|
|
case UAC2_CLOCK_SOURCE:
|
|
return 0; /* NOP */
|
|
case UAC_MIXER_UNIT:
|
|
return parse_audio_mixer_unit(state, unitid, p1);
|
|
case UAC_SELECTOR_UNIT:
|
|
case UAC2_CLOCK_SELECTOR:
|
|
return parse_audio_selector_unit(state, unitid, p1);
|
|
case UAC_FEATURE_UNIT:
|
|
return parse_audio_feature_unit(state, unitid, p1);
|
|
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 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);
|
|
else /* UAC_VERSION_2 */
|
|
return parse_audio_processing_unit(state, unitid, p1);
|
|
case UAC2_EXTENSION_UNIT_V2:
|
|
return parse_audio_extension_unit(state, unitid, p1);
|
|
default:
|
|
snd_printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
|
|
{
|
|
kfree(mixer->id_elems);
|
|
if (mixer->urb) {
|
|
kfree(mixer->urb->transfer_buffer);
|
|
usb_free_urb(mixer->urb);
|
|
}
|
|
usb_free_urb(mixer->rc_urb);
|
|
kfree(mixer->rc_setup_packet);
|
|
kfree(mixer);
|
|
}
|
|
|
|
static int snd_usb_mixer_dev_free(struct snd_device *device)
|
|
{
|
|
struct usb_mixer_interface *mixer = device->device_data;
|
|
snd_usb_mixer_free(mixer);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* create mixer controls
|
|
*
|
|
* walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers
|
|
*/
|
|
static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
|
|
{
|
|
struct mixer_build state;
|
|
int err;
|
|
const struct usbmix_ctl_map *map;
|
|
void *p;
|
|
|
|
memset(&state, 0, sizeof(state));
|
|
state.chip = mixer->chip;
|
|
state.mixer = mixer;
|
|
state.buffer = mixer->hostif->extra;
|
|
state.buflen = mixer->hostif->extralen;
|
|
|
|
/* check the mapping table */
|
|
for (map = usbmix_ctl_maps; map->id; map++) {
|
|
if (map->id == state.chip->usb_id) {
|
|
state.map = map->map;
|
|
state.selector_map = map->selector_map;
|
|
mixer->ignore_ctl_error = map->ignore_ctl_error;
|
|
break;
|
|
}
|
|
}
|
|
|
|
p = NULL;
|
|
while ((p = snd_usb_find_csint_desc(mixer->hostif->extra, mixer->hostif->extralen,
|
|
p, UAC_OUTPUT_TERMINAL)) != NULL) {
|
|
if (mixer->protocol == UAC_VERSION_1) {
|
|
struct uac1_output_terminal_descriptor *desc = p;
|
|
|
|
if (desc->bLength < sizeof(*desc))
|
|
continue; /* invalid descriptor? */
|
|
set_bit(desc->bTerminalID, state.unitbitmap); /* mark terminal ID as visited */
|
|
state.oterm.id = desc->bTerminalID;
|
|
state.oterm.type = le16_to_cpu(desc->wTerminalType);
|
|
state.oterm.name = desc->iTerminal;
|
|
err = parse_audio_unit(&state, desc->bSourceID);
|
|
if (err < 0 && err != -EINVAL)
|
|
return err;
|
|
} else { /* UAC_VERSION_2 */
|
|
struct uac2_output_terminal_descriptor *desc = p;
|
|
|
|
if (desc->bLength < sizeof(*desc))
|
|
continue; /* invalid descriptor? */
|
|
set_bit(desc->bTerminalID, state.unitbitmap); /* mark terminal ID as visited */
|
|
state.oterm.id = desc->bTerminalID;
|
|
state.oterm.type = le16_to_cpu(desc->wTerminalType);
|
|
state.oterm.name = desc->iTerminal;
|
|
err = parse_audio_unit(&state, desc->bSourceID);
|
|
if (err < 0 && err != -EINVAL)
|
|
return err;
|
|
|
|
/* for UAC2, use the same approach to also add the clock selectors */
|
|
err = parse_audio_unit(&state, desc->bCSourceID);
|
|
if (err < 0 && err != -EINVAL)
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid)
|
|
{
|
|
struct usb_mixer_elem_info *info;
|
|
|
|
for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem)
|
|
snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
|
|
info->elem_id);
|
|
}
|
|
|
|
static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer,
|
|
int unitid,
|
|
struct usb_mixer_elem_info *cval)
|
|
{
|
|
static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN",
|
|
"S8", "U8", "S16", "U16"};
|
|
snd_iprintf(buffer, " Unit: %i\n", unitid);
|
|
if (cval->elem_id)
|
|
snd_iprintf(buffer, " Control: name=\"%s\", index=%i\n",
|
|
cval->elem_id->name, cval->elem_id->index);
|
|
snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, "
|
|
"channels=%i, type=\"%s\"\n", cval->id,
|
|
cval->control, cval->cmask, cval->channels,
|
|
val_types[cval->val_type]);
|
|
snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
|
|
cval->min, cval->max, cval->dBmin, cval->dBmax);
|
|
}
|
|
|
|
static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
|
|
struct snd_info_buffer *buffer)
|
|
{
|
|
struct snd_usb_audio *chip = entry->private_data;
|
|
struct usb_mixer_interface *mixer;
|
|
struct usb_mixer_elem_info *cval;
|
|
int unitid;
|
|
|
|
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, 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++) {
|
|
for (cval = mixer->id_elems[unitid]; cval;
|
|
cval = cval->next_id_elem)
|
|
snd_usb_mixer_dump_cval(buffer, unitid, cval);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer,
|
|
int attribute, int value, int index)
|
|
{
|
|
struct usb_mixer_elem_info *info;
|
|
__u8 unitid = (index >> 8) & 0xff;
|
|
__u8 control = (value >> 8) & 0xff;
|
|
__u8 channel = value & 0xff;
|
|
|
|
if (channel >= MAX_CHANNELS) {
|
|
snd_printk(KERN_DEBUG "%s(): bogus channel number %d\n",
|
|
__func__, channel);
|
|
return;
|
|
}
|
|
|
|
for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem) {
|
|
if (info->control != control)
|
|
continue;
|
|
|
|
switch (attribute) {
|
|
case UAC2_CS_CUR:
|
|
/* invalidate cache, so the value is read from the device */
|
|
if (channel)
|
|
info->cached &= ~(1 << channel);
|
|
else /* master channel */
|
|
info->cached = 0;
|
|
|
|
snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
|
|
info->elem_id);
|
|
break;
|
|
|
|
case UAC2_CS_RANGE:
|
|
/* TODO */
|
|
break;
|
|
|
|
case UAC2_CS_MEM:
|
|
/* TODO */
|
|
break;
|
|
|
|
default:
|
|
snd_printk(KERN_DEBUG "unknown attribute %d in interrupt\n",
|
|
attribute);
|
|
break;
|
|
} /* switch */
|
|
}
|
|
}
|
|
|
|
static void snd_usb_mixer_interrupt(struct urb *urb)
|
|
{
|
|
struct usb_mixer_interface *mixer = urb->context;
|
|
int len = urb->actual_length;
|
|
int ustatus = urb->status;
|
|
|
|
if (ustatus != 0)
|
|
goto requeue;
|
|
|
|
if (mixer->protocol == UAC_VERSION_1) {
|
|
struct uac1_status_word *status;
|
|
|
|
for (status = urb->transfer_buffer;
|
|
len >= sizeof(*status);
|
|
len -= sizeof(*status), status++) {
|
|
snd_printd(KERN_DEBUG "status interrupt: %02x %02x\n",
|
|
status->bStatusType,
|
|
status->bOriginator);
|
|
|
|
/* ignore any notifications not from the control interface */
|
|
if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) !=
|
|
UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF)
|
|
continue;
|
|
|
|
if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED)
|
|
snd_usb_mixer_rc_memory_change(mixer, status->bOriginator);
|
|
else
|
|
snd_usb_mixer_notify_id(mixer, status->bOriginator);
|
|
}
|
|
} else { /* UAC_VERSION_2 */
|
|
struct uac2_interrupt_data_msg *msg;
|
|
|
|
for (msg = urb->transfer_buffer;
|
|
len >= sizeof(*msg);
|
|
len -= sizeof(*msg), msg++) {
|
|
/* drop vendor specific and endpoint requests */
|
|
if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) ||
|
|
(msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP))
|
|
continue;
|
|
|
|
snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute,
|
|
le16_to_cpu(msg->wValue),
|
|
le16_to_cpu(msg->wIndex));
|
|
}
|
|
}
|
|
|
|
requeue:
|
|
if (ustatus != -ENOENT && ustatus != -ECONNRESET && ustatus != -ESHUTDOWN) {
|
|
urb->dev = mixer->chip->dev;
|
|
usb_submit_urb(urb, GFP_ATOMIC);
|
|
}
|
|
}
|
|
|
|
/* stop any bus activity of a mixer */
|
|
void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer)
|
|
{
|
|
usb_kill_urb(mixer->urb);
|
|
usb_kill_urb(mixer->rc_urb);
|
|
}
|
|
|
|
int snd_usb_mixer_activate(struct usb_mixer_interface *mixer)
|
|
{
|
|
int err;
|
|
|
|
if (mixer->urb) {
|
|
err = usb_submit_urb(mixer->urb, GFP_NOIO);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* create the handler for the optional status interrupt endpoint */
|
|
static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
|
|
{
|
|
struct usb_endpoint_descriptor *ep;
|
|
void *transfer_buffer;
|
|
int buffer_length;
|
|
unsigned int epnum;
|
|
|
|
/* we need one interrupt input endpoint */
|
|
if (get_iface_desc(mixer->hostif)->bNumEndpoints < 1)
|
|
return 0;
|
|
ep = get_endpoint(mixer->hostif, 0);
|
|
if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep))
|
|
return 0;
|
|
|
|
epnum = usb_endpoint_num(ep);
|
|
buffer_length = le16_to_cpu(ep->wMaxPacketSize);
|
|
transfer_buffer = kmalloc(buffer_length, GFP_KERNEL);
|
|
if (!transfer_buffer)
|
|
return -ENOMEM;
|
|
mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!mixer->urb) {
|
|
kfree(transfer_buffer);
|
|
return -ENOMEM;
|
|
}
|
|
usb_fill_int_urb(mixer->urb, mixer->chip->dev,
|
|
usb_rcvintpipe(mixer->chip->dev, epnum),
|
|
transfer_buffer, buffer_length,
|
|
snd_usb_mixer_interrupt, mixer, ep->bInterval);
|
|
usb_submit_urb(mixer->urb, GFP_KERNEL);
|
|
return 0;
|
|
}
|
|
|
|
int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
|
|
int ignore_error)
|
|
{
|
|
static struct snd_device_ops dev_ops = {
|
|
.dev_free = snd_usb_mixer_dev_free
|
|
};
|
|
struct usb_mixer_interface *mixer;
|
|
struct snd_info_entry *entry;
|
|
int err;
|
|
|
|
strcpy(chip->card->mixername, "USB Mixer");
|
|
|
|
mixer = kzalloc(sizeof(*mixer), GFP_KERNEL);
|
|
if (!mixer)
|
|
return -ENOMEM;
|
|
mixer->chip = chip;
|
|
mixer->ignore_ctl_error = ignore_error;
|
|
mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
|
|
GFP_KERNEL);
|
|
if (!mixer->id_elems) {
|
|
kfree(mixer);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
mixer->hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0];
|
|
switch (get_iface_desc(mixer->hostif)->bInterfaceProtocol) {
|
|
case UAC_VERSION_1:
|
|
default:
|
|
mixer->protocol = UAC_VERSION_1;
|
|
break;
|
|
case UAC_VERSION_2:
|
|
mixer->protocol = UAC_VERSION_2;
|
|
break;
|
|
}
|
|
|
|
if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
|
|
(err = snd_usb_mixer_status_create(mixer)) < 0)
|
|
goto _error;
|
|
|
|
snd_usb_mixer_apply_create_quirk(mixer);
|
|
|
|
err = snd_device_new(chip->card, SNDRV_DEV_LOWLEVEL, mixer, &dev_ops);
|
|
if (err < 0)
|
|
goto _error;
|
|
|
|
if (list_empty(&chip->mixer_list) &&
|
|
!snd_card_proc_new(chip->card, "usbmixer", &entry))
|
|
snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read);
|
|
|
|
list_add(&mixer->list, &chip->mixer_list);
|
|
return 0;
|
|
|
|
_error:
|
|
snd_usb_mixer_free(mixer);
|
|
return err;
|
|
}
|
|
|
|
void snd_usb_mixer_disconnect(struct list_head *p)
|
|
{
|
|
struct usb_mixer_interface *mixer;
|
|
|
|
mixer = list_entry(p, struct usb_mixer_interface, list);
|
|
usb_kill_urb(mixer->urb);
|
|
usb_kill_urb(mixer->rc_urb);
|
|
}
|