74 строки
2.2 KiB
C
74 строки
2.2 KiB
C
/**
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* Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
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*
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* This source file is released under GPL v2 license (no other versions).
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* See the COPYING file included in the main directory of this source
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* distribution for the license terms and conditions.
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*
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* @File ctresource.h
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*
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* @Brief
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* This file contains the definition of generic hardware resources for
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* resource management.
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*
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* @Author Liu Chun
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* @Date May 13 2008
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*
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*/
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#ifndef CTRESOURCE_H
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#define CTRESOURCE_H
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#include <linux/types.h>
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enum RSCTYP {
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SRC,
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SRCIMP,
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AMIXER,
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SUM,
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DAIO,
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NUM_RSCTYP /* This must be the last one and less than 16 */
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};
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struct rsc_ops;
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struct rsc {
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u32 idx:12; /* The index of a resource */
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u32 type:4; /* The type (RSCTYP) of a resource */
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u32 conj:12; /* Current conjugate index */
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u32 msr:4; /* The Master Sample Rate a resource working on */
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void *ctrl_blk; /* Chip specific control info block for a resource */
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struct hw *hw; /* Chip specific object for hardware access means */
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const struct rsc_ops *ops; /* Generic resource operations */
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};
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struct rsc_ops {
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int (*master)(struct rsc *rsc); /* Move to master resource */
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int (*next_conj)(struct rsc *rsc); /* Move to next conjugate resource */
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int (*index)(const struct rsc *rsc); /* Return the index of resource */
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/* Return the output slot number */
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int (*output_slot)(const struct rsc *rsc);
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};
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int
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rsc_init(struct rsc *rsc, u32 idx, enum RSCTYP type, u32 msr, struct hw *hw);
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int rsc_uninit(struct rsc *rsc);
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struct rsc_mgr {
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enum RSCTYP type; /* The type (RSCTYP) of resource to manage */
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unsigned int amount; /* The total amount of a kind of resource */
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unsigned int avail; /* The amount of currently available resources */
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unsigned char *rscs; /* The bit-map for resource allocation */
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void *ctrl_blk; /* Chip specific control info block */
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struct hw *hw; /* Chip specific object for hardware access */
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};
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/* Resource management is based on bit-map mechanism */
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int rsc_mgr_init(struct rsc_mgr *mgr, enum RSCTYP type,
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unsigned int amount, struct hw *hw);
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int rsc_mgr_uninit(struct rsc_mgr *mgr);
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int mgr_get_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int *ridx);
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int mgr_put_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int idx);
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#endif /* CTRESOURCE_H */
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