mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 16:38:31 +00:00
030a07e441
Added a new US122L usb-audio driver. This driver works together with a dedicated alsa-lib plugin. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
/*
|
|
* Copyright (C) 2007, 2008 Karsten Wiese <fzu@wemgehoertderstaat.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software Foundation,
|
|
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#define USB_STREAM_INTERFACE_VERSION 2
|
|
|
|
#define SNDRV_USB_STREAM_IOCTL_SET_PARAMS \
|
|
_IOW('H', 0x90, struct usb_stream_config)
|
|
|
|
struct usb_stream_packet {
|
|
unsigned offset;
|
|
unsigned length;
|
|
};
|
|
|
|
|
|
struct usb_stream_config {
|
|
unsigned version;
|
|
unsigned sample_rate;
|
|
unsigned period_frames;
|
|
unsigned frame_size;
|
|
};
|
|
|
|
struct usb_stream {
|
|
struct usb_stream_config cfg;
|
|
unsigned read_size;
|
|
unsigned write_size;
|
|
|
|
int period_size;
|
|
|
|
unsigned state;
|
|
|
|
int idle_insize;
|
|
int idle_outsize;
|
|
int sync_packet;
|
|
unsigned insize_done;
|
|
unsigned periods_done;
|
|
unsigned periods_polled;
|
|
|
|
struct usb_stream_packet outpacket[2];
|
|
unsigned inpackets;
|
|
unsigned inpacket_head;
|
|
unsigned inpacket_split;
|
|
unsigned inpacket_split_at;
|
|
unsigned next_inpacket_split;
|
|
unsigned next_inpacket_split_at;
|
|
struct usb_stream_packet inpacket[0];
|
|
};
|
|
|
|
enum usb_stream_state {
|
|
usb_stream_invalid,
|
|
usb_stream_stopped,
|
|
usb_stream_sync0,
|
|
usb_stream_sync1,
|
|
usb_stream_ready,
|
|
usb_stream_running,
|
|
usb_stream_xrun,
|
|
};
|
|
|
|
#if __KERNEL__
|
|
|
|
#define USB_STREAM_NURBS 4
|
|
#define USB_STREAM_URBDEPTH 4
|
|
|
|
struct usb_stream_kernel {
|
|
struct usb_stream *s;
|
|
|
|
void *write_page;
|
|
|
|
unsigned n_o_ps;
|
|
|
|
struct urb *inurb[USB_STREAM_NURBS];
|
|
struct urb *idle_inurb;
|
|
struct urb *completed_inurb;
|
|
struct urb *outurb[USB_STREAM_NURBS];
|
|
struct urb *idle_outurb;
|
|
struct urb *completed_outurb;
|
|
struct urb *i_urb;
|
|
|
|
int iso_frame_balance;
|
|
|
|
wait_queue_head_t sleep;
|
|
|
|
unsigned out_phase;
|
|
unsigned out_phase_peeked;
|
|
unsigned freqn;
|
|
};
|
|
|
|
struct usb_stream *usb_stream_new(struct usb_stream_kernel *sk,
|
|
struct usb_device *dev,
|
|
unsigned in_endpoint, unsigned out_endpoint,
|
|
unsigned sample_rate, unsigned use_packsize,
|
|
unsigned period_frames, unsigned frame_size);
|
|
void usb_stream_free(struct usb_stream_kernel *);
|
|
int usb_stream_start(struct usb_stream_kernel *);
|
|
void usb_stream_stop(struct usb_stream_kernel *);
|
|
|
|
|
|
#endif
|