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;
39 struct mutex shutdown_mutex;
40 unsigned int txfr_quirk:1; /* Subframe boundaries on transfers */
42 int num_suspended_intf;
44 struct list_head pcm_list; /* list of pcm streams */
47 struct list_head midi_list; /* list of midi interfaces */
49 struct list_head mixer_list; /* list of mixer interfaces */
51 int setup; /* from the 'device_setup' module param */
52 int nrpacks; /* from the 'nrpacks' module param */
53 int async_unlink; /* from the 'async_unlink' module param */
55 struct usb_host_interface *ctrl_intf; /* the audio control interface */
59 * Information about devices with broken descriptors
62 /* special values for .ifnum */
63 #define QUIRK_NO_INTERFACE -2
64 #define QUIRK_ANY_INTERFACE -1
67 QUIRK_IGNORE_INTERFACE,
69 QUIRK_MIDI_STANDARD_INTERFACE,
70 QUIRK_MIDI_FIXED_ENDPOINT,
79 QUIRK_AUDIO_STANDARD_INTERFACE,
80 QUIRK_AUDIO_FIXED_ENDPOINT,
81 QUIRK_AUDIO_EDIROL_UAXX,
82 QUIRK_AUDIO_ALIGN_TRANSFER,
87 struct snd_usb_audio_quirk {
88 const char *vendor_name;
89 const char *product_name;
95 #define combine_word(s) ((*(s)) | ((unsigned int)(s)[1] << 8))
96 #define combine_triple(s) (combine_word(s) | ((unsigned int)(s)[2] << 16))
97 #define combine_quad(s) (combine_triple(s) | ((unsigned int)(s)[3] << 24))
99 #endif /* __USBAUDIO_H */