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 /* maximum number of endpoints per interface */
25 #define MIDI_MAX_ENDPOINTS 2
27 /* handling of USB vendor/product ID pairs as 32-bit numbers */
28 #define USB_ID(vendor, product) (((vendor) << 16) | (product))
29 #define USB_ID_VENDOR(id) ((id) >> 16)
30 #define USB_ID_PRODUCT(id) ((u16)(id))
35 struct snd_usb_audio {
37 struct usb_device *dev;
38 struct snd_card *card;
41 unsigned int txfr_quirk:1; /* Subframe boundaries on transfers */
43 int num_suspended_intf;
45 /* for audio class v2 */
48 struct list_head pcm_list; /* list of pcm streams */
51 struct list_head midi_list; /* list of midi interfaces */
53 struct list_head mixer_list; /* list of mixer interfaces */
57 * Information about devices with broken descriptors
60 /* special values for .ifnum */
61 #define QUIRK_NO_INTERFACE -2
62 #define QUIRK_ANY_INTERFACE -1
65 QUIRK_IGNORE_INTERFACE,
67 QUIRK_MIDI_STANDARD_INTERFACE,
68 QUIRK_MIDI_FIXED_ENDPOINT,
76 QUIRK_AUDIO_STANDARD_INTERFACE,
77 QUIRK_AUDIO_FIXED_ENDPOINT,
78 QUIRK_AUDIO_EDIROL_UAXX,
79 QUIRK_AUDIO_ALIGN_TRANSFER,
84 struct snd_usb_audio_quirk {
85 const char *vendor_name;
86 const char *product_name;
92 /* data for QUIRK_MIDI_FIXED_ENDPOINT */
93 struct snd_usb_midi_endpoint_info {
94 int8_t out_ep; /* ep number, 0 autodetect */
95 uint8_t out_interval; /* interval for interrupt endpoints */
98 uint16_t out_cables; /* bitmask */
99 uint16_t in_cables; /* bitmask */
102 /* for QUIRK_MIDI_YAMAHA, data is NULL */
104 /* for QUIRK_MIDI_MIDIMAN, data points to a snd_usb_midi_endpoint_info
105 * structure (out_cables and in_cables only) */
107 /* for QUIRK_COMPOSITE, data points to an array of snd_usb_audio_quirk
108 * structures, terminated with .ifnum = -1 */
110 /* for QUIRK_AUDIO_FIXED_ENDPOINT, data points to an audioformat structure */
112 /* for QUIRK_AUDIO/MIDI_STANDARD_INTERFACE, data is NULL */
114 /* for QUIRK_AUDIO_EDIROL_UAXX, data is NULL */
116 /* for QUIRK_IGNORE_INTERFACE, data is NULL */
118 /* for QUIRK_MIDI_NOVATION and _RAW, data is NULL */
120 /* for QUIRK_MIDI_EMAGIC, data points to a snd_usb_midi_endpoint_info
121 * structure (out_cables and in_cables only) */
123 /* for QUIRK_MIDI_CME, data is NULL */
128 /*E-mu USB samplerate control quirk*/
130 EMU_QUIRK_SR_44100HZ = 0,
131 EMU_QUIRK_SR_48000HZ,
132 EMU_QUIRK_SR_88200HZ,
133 EMU_QUIRK_SR_96000HZ,
134 EMU_QUIRK_SR_176400HZ,
135 EMU_QUIRK_SR_192000HZ
138 #define combine_word(s) ((*(s)) | ((unsigned int)(s)[1] << 8))
139 #define combine_triple(s) (combine_word(s) | ((unsigned int)(s)[2] << 16))
140 #define combine_quad(s) (combine_triple(s) | ((unsigned int)(s)[3] << 24))
142 unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size);
144 void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype);
145 void *snd_usb_find_csint_desc(void *descstart, int desclen, void *after, u8 dsubtype);
147 int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe,
148 __u8 request, __u8 requesttype, __u16 value, __u16 index,
149 void *data, __u16 size, int timeout);
151 int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
153 void snd_usb_mixer_disconnect(struct list_head *p);
155 int snd_usbmidi_create(struct snd_card *card,
156 struct usb_interface *iface,
157 struct list_head *midi_list,
158 const struct snd_usb_audio_quirk *quirk);
159 void snd_usbmidi_input_stop(struct list_head* p);
160 void snd_usbmidi_input_start(struct list_head* p);
161 void snd_usbmidi_disconnect(struct list_head *p);
163 void snd_emuusb_set_samplerate(struct snd_usb_audio *chip,
164 unsigned char samplerate_id);
167 * retrieve usb_interface descriptor from the host interface
168 * (conditional for compatibility with the older API)
170 #ifndef get_iface_desc
171 #define get_iface_desc(iface) (&(iface)->desc)
172 #define get_endpoint(alt,ep) (&(alt)->endpoint[ep].desc)
173 #define get_ep_desc(ep) (&(ep)->desc)
174 #define get_cfg_desc(cfg) (&(cfg)->desc)
177 #ifndef snd_usb_get_speed
178 #define snd_usb_get_speed(dev) ((dev)->speed)
181 #endif /* __USBAUDIO_H */