12504ba9fSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 20c0d06caSMauro Carvalho Chehab /* 30c0d06caSMauro Carvalho Chehab * 40c0d06caSMauro Carvalho Chehab * Copyright (C) 2005 Mike Isely <isely@pobox.com> 50c0d06caSMauro Carvalho Chehab */ 60c0d06caSMauro Carvalho Chehab #ifndef __PVRUSB2_IO_H 70c0d06caSMauro Carvalho Chehab #define __PVRUSB2_IO_H 80c0d06caSMauro Carvalho Chehab 90c0d06caSMauro Carvalho Chehab #include <linux/usb.h> 100c0d06caSMauro Carvalho Chehab #include <linux/list.h> 110c0d06caSMauro Carvalho Chehab 120c0d06caSMauro Carvalho Chehab typedef void (*pvr2_stream_callback)(void *); 130c0d06caSMauro Carvalho Chehab 140c0d06caSMauro Carvalho Chehab enum pvr2_buffer_state { 150c0d06caSMauro Carvalho Chehab pvr2_buffer_state_none = 0, // Not on any list 160c0d06caSMauro Carvalho Chehab pvr2_buffer_state_idle = 1, // Buffer is ready to be used again 170c0d06caSMauro Carvalho Chehab pvr2_buffer_state_queued = 2, // Buffer has been queued for filling 180c0d06caSMauro Carvalho Chehab pvr2_buffer_state_ready = 3, // Buffer has data available 190c0d06caSMauro Carvalho Chehab }; 200c0d06caSMauro Carvalho Chehab 210c0d06caSMauro Carvalho Chehab struct pvr2_stream; 220c0d06caSMauro Carvalho Chehab struct pvr2_buffer; 230c0d06caSMauro Carvalho Chehab 240c0d06caSMauro Carvalho Chehab struct pvr2_stream_stats { 250c0d06caSMauro Carvalho Chehab unsigned int buffers_in_queue; 260c0d06caSMauro Carvalho Chehab unsigned int buffers_in_idle; 270c0d06caSMauro Carvalho Chehab unsigned int buffers_in_ready; 280c0d06caSMauro Carvalho Chehab unsigned int buffers_processed; 290c0d06caSMauro Carvalho Chehab unsigned int buffers_failed; 300c0d06caSMauro Carvalho Chehab unsigned int bytes_processed; 310c0d06caSMauro Carvalho Chehab }; 320c0d06caSMauro Carvalho Chehab 330c0d06caSMauro Carvalho Chehab /* Initialize / tear down stream structure */ 340c0d06caSMauro Carvalho Chehab struct pvr2_stream *pvr2_stream_create(void); 350c0d06caSMauro Carvalho Chehab void pvr2_stream_destroy(struct pvr2_stream *); 360c0d06caSMauro Carvalho Chehab void pvr2_stream_setup(struct pvr2_stream *, 370c0d06caSMauro Carvalho Chehab struct usb_device *dev,int endpoint, 380c0d06caSMauro Carvalho Chehab unsigned int tolerance); 390c0d06caSMauro Carvalho Chehab void pvr2_stream_set_callback(struct pvr2_stream *, 400c0d06caSMauro Carvalho Chehab pvr2_stream_callback func, 410c0d06caSMauro Carvalho Chehab void *data); 420c0d06caSMauro Carvalho Chehab void pvr2_stream_get_stats(struct pvr2_stream *, 430c0d06caSMauro Carvalho Chehab struct pvr2_stream_stats *, 440c0d06caSMauro Carvalho Chehab int zero_counts); 450c0d06caSMauro Carvalho Chehab 460c0d06caSMauro Carvalho Chehab /* Query / set the nominal buffer count */ 470c0d06caSMauro Carvalho Chehab int pvr2_stream_get_buffer_count(struct pvr2_stream *); 480c0d06caSMauro Carvalho Chehab int pvr2_stream_set_buffer_count(struct pvr2_stream *,unsigned int); 490c0d06caSMauro Carvalho Chehab 500c0d06caSMauro Carvalho Chehab /* Get a pointer to a buffer that is either idle, ready, or is specified 510c0d06caSMauro Carvalho Chehab named. */ 520c0d06caSMauro Carvalho Chehab struct pvr2_buffer *pvr2_stream_get_idle_buffer(struct pvr2_stream *); 530c0d06caSMauro Carvalho Chehab struct pvr2_buffer *pvr2_stream_get_ready_buffer(struct pvr2_stream *); 540c0d06caSMauro Carvalho Chehab struct pvr2_buffer *pvr2_stream_get_buffer(struct pvr2_stream *sp,int id); 550c0d06caSMauro Carvalho Chehab 560c0d06caSMauro Carvalho Chehab /* Find out how many buffers are idle or ready */ 570c0d06caSMauro Carvalho Chehab int pvr2_stream_get_ready_count(struct pvr2_stream *); 580c0d06caSMauro Carvalho Chehab 590c0d06caSMauro Carvalho Chehab 600c0d06caSMauro Carvalho Chehab /* Kill all pending buffers and throw away any ready buffers as well */ 610c0d06caSMauro Carvalho Chehab void pvr2_stream_kill(struct pvr2_stream *); 620c0d06caSMauro Carvalho Chehab 630c0d06caSMauro Carvalho Chehab /* Set up the actual storage for a buffer */ 640c0d06caSMauro Carvalho Chehab int pvr2_buffer_set_buffer(struct pvr2_buffer *,void *ptr,unsigned int cnt); 650c0d06caSMauro Carvalho Chehab 660c0d06caSMauro Carvalho Chehab /* Find out size of data in the given ready buffer */ 670c0d06caSMauro Carvalho Chehab unsigned int pvr2_buffer_get_count(struct pvr2_buffer *); 680c0d06caSMauro Carvalho Chehab 690c0d06caSMauro Carvalho Chehab /* Retrieve completion code for given ready buffer */ 700c0d06caSMauro Carvalho Chehab int pvr2_buffer_get_status(struct pvr2_buffer *); 710c0d06caSMauro Carvalho Chehab 720c0d06caSMauro Carvalho Chehab /* Retrieve ID of given buffer */ 730c0d06caSMauro Carvalho Chehab int pvr2_buffer_get_id(struct pvr2_buffer *); 740c0d06caSMauro Carvalho Chehab 750c0d06caSMauro Carvalho Chehab /* Start reading into given buffer (kill it if needed) */ 760c0d06caSMauro Carvalho Chehab int pvr2_buffer_queue(struct pvr2_buffer *); 770c0d06caSMauro Carvalho Chehab 780c0d06caSMauro Carvalho Chehab #endif /* __PVRUSB2_IO_H */ 79