| Karsten Wiese | 030a07e | 2008-07-30 15:13:29 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007, 2008 Karsten Wiese <fzu@wemgehoertderstaat.de> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License as published by the |
| 6 | * Free Software Foundation; either version 2 of the License, or (at your |
| 7 | * option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 11 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software Foundation, |
| 16 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 17 | */ |
| 18 | |
| 19 | #define USB_STREAM_INTERFACE_VERSION 2 |
| 20 | |
| 21 | #define SNDRV_USB_STREAM_IOCTL_SET_PARAMS \ |
| 22 | _IOW('H', 0x90, struct usb_stream_config) |
| 23 | |
| 24 | struct usb_stream_packet { |
| 25 | unsigned offset; |
| 26 | unsigned length; |
| 27 | }; |
| 28 | |
| 29 | |
| 30 | struct usb_stream_config { |
| 31 | unsigned version; |
| 32 | unsigned sample_rate; |
| 33 | unsigned period_frames; |
| 34 | unsigned frame_size; |
| 35 | }; |
| 36 | |
| 37 | struct usb_stream { |
| 38 | struct usb_stream_config cfg; |
| 39 | unsigned read_size; |
| 40 | unsigned write_size; |
| 41 | |
| 42 | int period_size; |
| 43 | |
| 44 | unsigned state; |
| 45 | |
| 46 | int idle_insize; |
| 47 | int idle_outsize; |
| 48 | int sync_packet; |
| 49 | unsigned insize_done; |
| 50 | unsigned periods_done; |
| 51 | unsigned periods_polled; |
| 52 | |
| 53 | struct usb_stream_packet outpacket[2]; |
| 54 | unsigned inpackets; |
| 55 | unsigned inpacket_head; |
| 56 | unsigned inpacket_split; |
| 57 | unsigned inpacket_split_at; |
| 58 | unsigned next_inpacket_split; |
| 59 | unsigned next_inpacket_split_at; |
| 60 | struct usb_stream_packet inpacket[0]; |
| 61 | }; |
| 62 | |
| 63 | enum usb_stream_state { |
| 64 | usb_stream_invalid, |
| 65 | usb_stream_stopped, |
| 66 | usb_stream_sync0, |
| 67 | usb_stream_sync1, |
| 68 | usb_stream_ready, |
| 69 | usb_stream_running, |
| 70 | usb_stream_xrun, |
| 71 | }; |
| 72 | |
| 73 | #if __KERNEL__ |
| 74 | |
| 75 | #define USB_STREAM_NURBS 4 |
| 76 | #define USB_STREAM_URBDEPTH 4 |
| 77 | |
| 78 | struct usb_stream_kernel { |
| 79 | struct usb_stream *s; |
| 80 | |
| 81 | void *write_page; |
| 82 | |
| 83 | unsigned n_o_ps; |
| 84 | |
| 85 | struct urb *inurb[USB_STREAM_NURBS]; |
| 86 | struct urb *idle_inurb; |
| 87 | struct urb *completed_inurb; |
| 88 | struct urb *outurb[USB_STREAM_NURBS]; |
| 89 | struct urb *idle_outurb; |
| 90 | struct urb *completed_outurb; |
| 91 | struct urb *i_urb; |
| 92 | |
| 93 | int iso_frame_balance; |
| 94 | |
| 95 | wait_queue_head_t sleep; |
| 96 | |
| 97 | unsigned out_phase; |
| 98 | unsigned out_phase_peeked; |
| 99 | unsigned freqn; |
| 100 | }; |
| 101 | |
| 102 | struct usb_stream *usb_stream_new(struct usb_stream_kernel *sk, |
| 103 | struct usb_device *dev, |
| 104 | unsigned in_endpoint, unsigned out_endpoint, |
| 105 | unsigned sample_rate, unsigned use_packsize, |
| 106 | unsigned period_frames, unsigned frame_size); |
| 107 | void usb_stream_free(struct usb_stream_kernel *); |
| 108 | int usb_stream_start(struct usb_stream_kernel *); |
| 109 | void usb_stream_stop(struct usb_stream_kernel *); |
| 110 | |
| 111 | |
| 112 | #endif |