1 /* 2 * 3 * Copyright (C) 2005 Mike Isely <isely@pobox.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 */ 15 #ifndef __PVRUSB2_CONTEXT_H 16 #define __PVRUSB2_CONTEXT_H 17 18 #include <linux/mutex.h> 19 #include <linux/usb.h> 20 #include <linux/workqueue.h> 21 22 struct pvr2_hdw; /* hardware interface - defined elsewhere */ 23 struct pvr2_stream; /* stream interface - defined elsewhere */ 24 25 struct pvr2_context; /* All central state */ 26 struct pvr2_channel; /* One I/O pathway to a user */ 27 struct pvr2_context_stream; /* Wrapper for a stream */ 28 struct pvr2_ioread; /* Low level stream structure */ 29 30 struct pvr2_context_stream { 31 struct pvr2_channel *user; 32 struct pvr2_stream *stream; 33 }; 34 35 struct pvr2_context { 36 struct pvr2_channel *mc_first; 37 struct pvr2_channel *mc_last; 38 struct pvr2_context *exist_next; 39 struct pvr2_context *exist_prev; 40 struct pvr2_context *notify_next; 41 struct pvr2_context *notify_prev; 42 struct pvr2_hdw *hdw; 43 struct pvr2_context_stream video_stream; 44 struct mutex mutex; 45 int notify_flag; 46 int initialized_flag; 47 int disconnect_flag; 48 49 /* Called after pvr2_context initialization is complete */ 50 void (*setup_func)(struct pvr2_context *); 51 52 }; 53 54 struct pvr2_channel { 55 struct pvr2_context *mc_head; 56 struct pvr2_channel *mc_next; 57 struct pvr2_channel *mc_prev; 58 struct pvr2_context_stream *stream; 59 struct pvr2_hdw *hdw; 60 unsigned int input_mask; 61 void (*check_func)(struct pvr2_channel *); 62 }; 63 64 struct pvr2_context *pvr2_context_create(struct usb_interface *intf, 65 const struct usb_device_id *devid, 66 void (*setup_func)(struct pvr2_context *)); 67 void pvr2_context_disconnect(struct pvr2_context *); 68 69 void pvr2_channel_init(struct pvr2_channel *,struct pvr2_context *); 70 void pvr2_channel_done(struct pvr2_channel *); 71 int pvr2_channel_limit_inputs(struct pvr2_channel *,unsigned int); 72 unsigned int pvr2_channel_get_limited_inputs(struct pvr2_channel *); 73 int pvr2_channel_claim_stream(struct pvr2_channel *, 74 struct pvr2_context_stream *); 75 struct pvr2_ioread *pvr2_channel_create_mpeg_stream( 76 struct pvr2_context_stream *); 77 78 int pvr2_context_global_init(void); 79 void pvr2_context_global_done(void); 80 81 #endif /* __PVRUSB2_CONTEXT_H */ 82