1*2504ba9fSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 2d855497eSMike Isely /* 3d855497eSMike Isely * 4d855497eSMike Isely * Copyright (C) 2005 Mike Isely <isely@pobox.com> 5d855497eSMike Isely */ 6d855497eSMike Isely #ifndef __PVRUSB2_IO_H 7d855497eSMike Isely #define __PVRUSB2_IO_H 8d855497eSMike Isely 9d855497eSMike Isely #include <linux/usb.h> 10d855497eSMike Isely #include <linux/list.h> 11d855497eSMike Isely 12d855497eSMike Isely typedef void (*pvr2_stream_callback)(void *); 13d855497eSMike Isely 14d855497eSMike Isely enum pvr2_buffer_state { 15d855497eSMike Isely pvr2_buffer_state_none = 0, // Not on any list 16d855497eSMike Isely pvr2_buffer_state_idle = 1, // Buffer is ready to be used again 17d855497eSMike Isely pvr2_buffer_state_queued = 2, // Buffer has been queued for filling 18d855497eSMike Isely pvr2_buffer_state_ready = 3, // Buffer has data available 19d855497eSMike Isely }; 20d855497eSMike Isely 21d855497eSMike Isely struct pvr2_stream; 22d855497eSMike Isely struct pvr2_buffer; 23d855497eSMike Isely 24ad0992e9SMike Isely struct pvr2_stream_stats { 25ad0992e9SMike Isely unsigned int buffers_in_queue; 26ad0992e9SMike Isely unsigned int buffers_in_idle; 27ad0992e9SMike Isely unsigned int buffers_in_ready; 28ad0992e9SMike Isely unsigned int buffers_processed; 29ad0992e9SMike Isely unsigned int buffers_failed; 30ad0992e9SMike Isely unsigned int bytes_processed; 31ad0992e9SMike Isely }; 32ad0992e9SMike Isely 33d855497eSMike Isely /* Initialize / tear down stream structure */ 34d855497eSMike Isely struct pvr2_stream *pvr2_stream_create(void); 35d855497eSMike Isely void pvr2_stream_destroy(struct pvr2_stream *); 36d855497eSMike Isely void pvr2_stream_setup(struct pvr2_stream *, 37d855497eSMike Isely struct usb_device *dev,int endpoint, 38d855497eSMike Isely unsigned int tolerance); 39d855497eSMike Isely void pvr2_stream_set_callback(struct pvr2_stream *, 40d855497eSMike Isely pvr2_stream_callback func, 41d855497eSMike Isely void *data); 42ad0992e9SMike Isely void pvr2_stream_get_stats(struct pvr2_stream *, 43ad0992e9SMike Isely struct pvr2_stream_stats *, 44ad0992e9SMike Isely int zero_counts); 45d855497eSMike Isely 46d855497eSMike Isely /* Query / set the nominal buffer count */ 47e61b6fc5SMike Isely int pvr2_stream_get_buffer_count(struct pvr2_stream *); 48d855497eSMike Isely int pvr2_stream_set_buffer_count(struct pvr2_stream *,unsigned int); 49d855497eSMike Isely 50d855497eSMike Isely /* Get a pointer to a buffer that is either idle, ready, or is specified 51d855497eSMike Isely named. */ 52d855497eSMike Isely struct pvr2_buffer *pvr2_stream_get_idle_buffer(struct pvr2_stream *); 53d855497eSMike Isely struct pvr2_buffer *pvr2_stream_get_ready_buffer(struct pvr2_stream *); 54d855497eSMike Isely struct pvr2_buffer *pvr2_stream_get_buffer(struct pvr2_stream *sp,int id); 55d855497eSMike Isely 56d855497eSMike Isely /* Find out how many buffers are idle or ready */ 57d855497eSMike Isely int pvr2_stream_get_ready_count(struct pvr2_stream *); 58d855497eSMike Isely 59e61b6fc5SMike Isely 60d855497eSMike Isely /* Kill all pending buffers and throw away any ready buffers as well */ 61d855497eSMike Isely void pvr2_stream_kill(struct pvr2_stream *); 62d855497eSMike Isely 63d855497eSMike Isely /* Set up the actual storage for a buffer */ 64d855497eSMike Isely int pvr2_buffer_set_buffer(struct pvr2_buffer *,void *ptr,unsigned int cnt); 65d855497eSMike Isely 66d855497eSMike Isely /* Find out size of data in the given ready buffer */ 67d855497eSMike Isely unsigned int pvr2_buffer_get_count(struct pvr2_buffer *); 68d855497eSMike Isely 69d855497eSMike Isely /* Retrieve completion code for given ready buffer */ 70d855497eSMike Isely int pvr2_buffer_get_status(struct pvr2_buffer *); 71d855497eSMike Isely 72d855497eSMike Isely /* Retrieve ID of given buffer */ 73d855497eSMike Isely int pvr2_buffer_get_id(struct pvr2_buffer *); 74d855497eSMike Isely 75d855497eSMike Isely /* Start reading into given buffer (kill it if needed) */ 76d855497eSMike Isely int pvr2_buffer_queue(struct pvr2_buffer *); 77d855497eSMike Isely 78d855497eSMike Isely #endif /* __PVRUSB2_IO_H */ 79