4 * (Tentative) USB Audio Driver for ALSA
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 /* handling of USB vendor/product ID pairs as 32-bit numbers */
25 #define USB_ID(vendor, product) (((vendor) << 16) | (product))
26 #define USB_ID_VENDOR(id) ((id) >> 16)
27 #define USB_ID_PRODUCT(id) ((u16)(id))
33 struct snd_usb_audio {
35 struct usb_device *dev;
36 struct snd_card *card;
37 struct usb_interface *pm_intf;
40 struct rw_semaphore shutdown_rwsem;
41 unsigned int shutdown:1;
42 unsigned int probing:1;
43 unsigned int autosuspended:1;
44 unsigned int txfr_quirk:1; /* Subframe boundaries on transfers */
47 int num_suspended_intf;
49 struct list_head pcm_list; /* list of pcm streams */
50 struct list_head ep_list; /* list of audio-related endpoints */
53 struct list_head midi_list; /* list of midi interfaces */
55 struct list_head mixer_list; /* list of mixer interfaces */
57 int setup; /* from the 'device_setup' module param */
58 int nrpacks; /* from the 'nrpacks' module param */
59 bool autoclock; /* from the 'autoclock' module param */
61 struct usb_host_interface *ctrl_intf; /* the audio control interface */
65 * Information about devices with broken descriptors
68 /* special values for .ifnum */
69 #define QUIRK_NO_INTERFACE -2
70 #define QUIRK_ANY_INTERFACE -1
73 QUIRK_IGNORE_INTERFACE,
76 QUIRK_MIDI_STANDARD_INTERFACE,
77 QUIRK_MIDI_FIXED_ENDPOINT,
88 QUIRK_AUDIO_STANDARD_INTERFACE,
89 QUIRK_AUDIO_FIXED_ENDPOINT,
90 QUIRK_AUDIO_EDIROL_UAXX,
91 QUIRK_AUDIO_ALIGN_TRANSFER,
92 QUIRK_AUDIO_STANDARD_MIXER,
97 struct snd_usb_audio_quirk {
98 const char *vendor_name;
99 const char *product_name;
105 #define combine_word(s) ((*(s)) | ((unsigned int)(s)[1] << 8))
106 #define combine_triple(s) (combine_word(s) | ((unsigned int)(s)[2] << 16))
107 #define combine_quad(s) (combine_triple(s) | ((unsigned int)(s)[3] << 24))
109 #endif /* __USBAUDIO_H */