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/*
* chnldefs.h
*
* DSP-BIOS Bridge driver support functions for TI OMAP processors.
*
* System-wide channel objects and constants.
*
* Copyright (C) 2005-2006 Texas Instruments, Inc.
*
* This package is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef CHNLDEFS_
#define CHNLDEFS_
/* Channel id option. */
#define CHNL_PICKFREE (~0UL) /* Let manager pick a free channel. */
/* Channel modes */
#define CHNL_MODETODSP 0 /* Data streaming to the DSP. */
#define CHNL_MODEFROMDSP 1 /* Data streaming from the DSP. */
/* GetIOCompletion flags */
#define CHNL_IOCINFINITE 0xffffffff /* Wait forever for IO completion. */
#define CHNL_IOCNOWAIT 0x0 /* Dequeue an IOC, if available. */
/* IO Completion Record status: */
#define CHNL_IOCSTATCOMPLETE 0x0000 /* IO Completed. */
#define CHNL_IOCSTATCANCEL 0x0002 /* IO was cancelled */
#define CHNL_IOCSTATTIMEOUT 0x0008 /* Wait for IOC timed out. */
#define CHNL_IOCSTATEOS 0x8000 /* End Of Stream reached. */
/* Macros for checking I/O Completion status: */
#define CHNL_IS_IO_COMPLETE(ioc) (!(ioc.status & ~CHNL_IOCSTATEOS))
#define CHNL_IS_IO_CANCELLED(ioc) (ioc.status & CHNL_IOCSTATCANCEL)
#define CHNL_IS_TIMED_OUT(ioc) (ioc.status & CHNL_IOCSTATTIMEOUT)
/* Channel attributes: */
struct chnl_attr {
u32 uio_reqs; /* Max # of preallocated I/O requests. */
void *event_obj; /* User supplied auto-reset event object. */
char *str_event_name; /* Ptr to name of user event object. */
void *reserved1; /* Reserved for future use. */
u32 reserved2; /* Reserved for future use. */
};
/* I/O completion record: */
struct chnl_ioc {
void *buf; /* Buffer to be filled/emptied. */
u32 byte_size; /* Bytes transferred. */
u32 buf_size; /* Actual buffer size in bytes */
u32 status; /* Status of IO completion. */
u32 arg; /* User argument associated with buf. */
};
#endif /* CHNLDEFS_ */
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