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))
32 struct snd_usb_audio {
34 struct usb_device *dev;
35 struct snd_card *card;
38 unsigned int txfr_quirk:1; /* Subframe boundaries on transfers */
40 int num_suspended_intf;
42 /* for audio class v2 */
45 struct list_head pcm_list; /* list of pcm streams */
48 struct list_head midi_list; /* list of midi interfaces */
50 struct list_head mixer_list; /* list of mixer interfaces */
54 * Information about devices with broken descriptors
57 /* special values for .ifnum */
58 #define QUIRK_NO_INTERFACE -2
59 #define QUIRK_ANY_INTERFACE -1
62 QUIRK_IGNORE_INTERFACE,
64 QUIRK_MIDI_STANDARD_INTERFACE,
65 QUIRK_MIDI_FIXED_ENDPOINT,
73 QUIRK_AUDIO_STANDARD_INTERFACE,
74 QUIRK_AUDIO_FIXED_ENDPOINT,
75 QUIRK_AUDIO_EDIROL_UAXX,
76 QUIRK_AUDIO_ALIGN_TRANSFER,
81 struct snd_usb_audio_quirk {
82 const char *vendor_name;
83 const char *product_name;
92 /*E-mu USB samplerate control quirk*/
94 EMU_QUIRK_SR_44100HZ = 0,
98 EMU_QUIRK_SR_176400HZ,
102 #define combine_word(s) ((*(s)) | ((unsigned int)(s)[1] << 8))
103 #define combine_triple(s) (combine_word(s) | ((unsigned int)(s)[2] << 16))
104 #define combine_quad(s) (combine_triple(s) | ((unsigned int)(s)[3] << 24))
106 unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size);
108 void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype);
109 void *snd_usb_find_csint_desc(void *descstart, int desclen, void *after, u8 dsubtype);
111 int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe,
112 __u8 request, __u8 requesttype, __u16 value, __u16 index,
113 void *data, __u16 size, int timeout);
116 * retrieve usb_interface descriptor from the host interface
117 * (conditional for compatibility with the older API)
119 #ifndef get_iface_desc
120 #define get_iface_desc(iface) (&(iface)->desc)
121 #define get_endpoint(alt,ep) (&(alt)->endpoint[ep].desc)
122 #define get_ep_desc(ep) (&(ep)->desc)
123 #define get_cfg_desc(cfg) (&(cfg)->desc)
126 #ifndef snd_usb_get_speed
127 #define snd_usb_get_speed(dev) ((dev)->speed)
130 #endif /* __USBAUDIO_H */