1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * Copyright (C) 2005 Mike Isely <isely@pobox.com> 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun #ifndef __PVRUSB2_IO_H 7*4882a593Smuzhiyun #define __PVRUSB2_IO_H 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #include <linux/usb.h> 10*4882a593Smuzhiyun #include <linux/list.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun typedef void (*pvr2_stream_callback)(void *); 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun enum pvr2_buffer_state { 15*4882a593Smuzhiyun pvr2_buffer_state_none = 0, // Not on any list 16*4882a593Smuzhiyun pvr2_buffer_state_idle = 1, // Buffer is ready to be used again 17*4882a593Smuzhiyun pvr2_buffer_state_queued = 2, // Buffer has been queued for filling 18*4882a593Smuzhiyun pvr2_buffer_state_ready = 3, // Buffer has data available 19*4882a593Smuzhiyun }; 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun struct pvr2_stream; 22*4882a593Smuzhiyun struct pvr2_buffer; 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun struct pvr2_stream_stats { 25*4882a593Smuzhiyun unsigned int buffers_in_queue; 26*4882a593Smuzhiyun unsigned int buffers_in_idle; 27*4882a593Smuzhiyun unsigned int buffers_in_ready; 28*4882a593Smuzhiyun unsigned int buffers_processed; 29*4882a593Smuzhiyun unsigned int buffers_failed; 30*4882a593Smuzhiyun unsigned int bytes_processed; 31*4882a593Smuzhiyun }; 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun /* Initialize / tear down stream structure */ 34*4882a593Smuzhiyun struct pvr2_stream *pvr2_stream_create(void); 35*4882a593Smuzhiyun void pvr2_stream_destroy(struct pvr2_stream *); 36*4882a593Smuzhiyun void pvr2_stream_setup(struct pvr2_stream *, 37*4882a593Smuzhiyun struct usb_device *dev,int endpoint, 38*4882a593Smuzhiyun unsigned int tolerance); 39*4882a593Smuzhiyun void pvr2_stream_set_callback(struct pvr2_stream *, 40*4882a593Smuzhiyun pvr2_stream_callback func, 41*4882a593Smuzhiyun void *data); 42*4882a593Smuzhiyun void pvr2_stream_get_stats(struct pvr2_stream *, 43*4882a593Smuzhiyun struct pvr2_stream_stats *, 44*4882a593Smuzhiyun int zero_counts); 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun /* Query / set the nominal buffer count */ 47*4882a593Smuzhiyun int pvr2_stream_get_buffer_count(struct pvr2_stream *); 48*4882a593Smuzhiyun int pvr2_stream_set_buffer_count(struct pvr2_stream *,unsigned int); 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun /* Get a pointer to a buffer that is either idle, ready, or is specified 51*4882a593Smuzhiyun named. */ 52*4882a593Smuzhiyun struct pvr2_buffer *pvr2_stream_get_idle_buffer(struct pvr2_stream *); 53*4882a593Smuzhiyun struct pvr2_buffer *pvr2_stream_get_ready_buffer(struct pvr2_stream *); 54*4882a593Smuzhiyun struct pvr2_buffer *pvr2_stream_get_buffer(struct pvr2_stream *sp,int id); 55*4882a593Smuzhiyun 56*4882a593Smuzhiyun /* Find out how many buffers are idle or ready */ 57*4882a593Smuzhiyun int pvr2_stream_get_ready_count(struct pvr2_stream *); 58*4882a593Smuzhiyun 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun /* Kill all pending buffers and throw away any ready buffers as well */ 61*4882a593Smuzhiyun void pvr2_stream_kill(struct pvr2_stream *); 62*4882a593Smuzhiyun 63*4882a593Smuzhiyun /* Set up the actual storage for a buffer */ 64*4882a593Smuzhiyun int pvr2_buffer_set_buffer(struct pvr2_buffer *,void *ptr,unsigned int cnt); 65*4882a593Smuzhiyun 66*4882a593Smuzhiyun /* Find out size of data in the given ready buffer */ 67*4882a593Smuzhiyun unsigned int pvr2_buffer_get_count(struct pvr2_buffer *); 68*4882a593Smuzhiyun 69*4882a593Smuzhiyun /* Retrieve completion code for given ready buffer */ 70*4882a593Smuzhiyun int pvr2_buffer_get_status(struct pvr2_buffer *); 71*4882a593Smuzhiyun 72*4882a593Smuzhiyun /* Retrieve ID of given buffer */ 73*4882a593Smuzhiyun int pvr2_buffer_get_id(struct pvr2_buffer *); 74*4882a593Smuzhiyun 75*4882a593Smuzhiyun /* Start reading into given buffer (kill it if needed) */ 76*4882a593Smuzhiyun int pvr2_buffer_queue(struct pvr2_buffer *); 77*4882a593Smuzhiyun 78*4882a593Smuzhiyun #endif /* __PVRUSB2_IO_H */ 79