diff options
Diffstat (limited to 'drivers/media/usb/pvrusb2/pvrusb2-io.h')
| -rw-r--r-- | drivers/media/usb/pvrusb2/pvrusb2-io.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/drivers/media/usb/pvrusb2/pvrusb2-io.h b/drivers/media/usb/pvrusb2/pvrusb2-io.h new file mode 100644 index 0000000000..80e4f831f5 --- /dev/null +++ b/drivers/media/usb/pvrusb2/pvrusb2-io.h @@ -0,0 +1,78 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * + * Copyright (C) 2005 Mike Isely <isely@pobox.com> + */ +#ifndef __PVRUSB2_IO_H +#define __PVRUSB2_IO_H + +#include <linux/usb.h> +#include <linux/list.h> + +typedef void (*pvr2_stream_callback)(void *); + +enum pvr2_buffer_state { + pvr2_buffer_state_none = 0, // Not on any list + pvr2_buffer_state_idle = 1, // Buffer is ready to be used again + pvr2_buffer_state_queued = 2, // Buffer has been queued for filling + pvr2_buffer_state_ready = 3, // Buffer has data available +}; + +struct pvr2_stream; +struct pvr2_buffer; + +struct pvr2_stream_stats { + unsigned int buffers_in_queue; + unsigned int buffers_in_idle; + unsigned int buffers_in_ready; + unsigned int buffers_processed; + unsigned int buffers_failed; + unsigned int bytes_processed; +}; + +/* Initialize / tear down stream structure */ +struct pvr2_stream *pvr2_stream_create(void); +void pvr2_stream_destroy(struct pvr2_stream *); +void pvr2_stream_setup(struct pvr2_stream *, + struct usb_device *dev,int endpoint, + unsigned int tolerance); +void pvr2_stream_set_callback(struct pvr2_stream *, + pvr2_stream_callback func, + void *data); +void pvr2_stream_get_stats(struct pvr2_stream *, + struct pvr2_stream_stats *, + int zero_counts); + +/* Query / set the nominal buffer count */ +int pvr2_stream_get_buffer_count(struct pvr2_stream *); +int pvr2_stream_set_buffer_count(struct pvr2_stream *,unsigned int); + +/* Get a pointer to a buffer that is either idle, ready, or is specified + named. */ +struct pvr2_buffer *pvr2_stream_get_idle_buffer(struct pvr2_stream *); +struct pvr2_buffer *pvr2_stream_get_ready_buffer(struct pvr2_stream *); +struct pvr2_buffer *pvr2_stream_get_buffer(struct pvr2_stream *sp,int id); + +/* Find out how many buffers are idle or ready */ +int pvr2_stream_get_ready_count(struct pvr2_stream *); + + +/* Kill all pending buffers and throw away any ready buffers as well */ +void pvr2_stream_kill(struct pvr2_stream *); + +/* Set up the actual storage for a buffer */ +int pvr2_buffer_set_buffer(struct pvr2_buffer *,void *ptr,unsigned int cnt); + +/* Find out size of data in the given ready buffer */ +unsigned int pvr2_buffer_get_count(struct pvr2_buffer *); + +/* Retrieve completion code for given ready buffer */ +int pvr2_buffer_get_status(struct pvr2_buffer *); + +/* Retrieve ID of given buffer */ +int pvr2_buffer_get_id(struct pvr2_buffer *); + +/* Start reading into given buffer (kill it if needed) */ +int pvr2_buffer_queue(struct pvr2_buffer *); + +#endif /* __PVRUSB2_IO_H */ |