ctresource.h (2134B)
1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved. 4 * 5 * @File ctresource.h 6 * 7 * @Brief 8 * This file contains the definition of generic hardware resources for 9 * resource management. 10 * 11 * @Author Liu Chun 12 * @Date May 13 2008 13 */ 14 15#ifndef CTRESOURCE_H 16#define CTRESOURCE_H 17 18#include <linux/types.h> 19 20enum RSCTYP { 21 SRC, 22 SRCIMP, 23 AMIXER, 24 SUM, 25 DAIO, 26 NUM_RSCTYP /* This must be the last one and less than 16 */ 27}; 28 29struct rsc_ops; 30 31struct rsc { 32 u32 idx:12; /* The index of a resource */ 33 u32 type:4; /* The type (RSCTYP) of a resource */ 34 u32 conj:12; /* Current conjugate index */ 35 u32 msr:4; /* The Master Sample Rate a resource working on */ 36 void *ctrl_blk; /* Chip specific control info block for a resource */ 37 struct hw *hw; /* Chip specific object for hardware access means */ 38 const struct rsc_ops *ops; /* Generic resource operations */ 39}; 40 41struct rsc_ops { 42 void (*master)(struct rsc *rsc); /* Move to master resource */ 43 void (*next_conj)(struct rsc *rsc); /* Move to next conjugate resource */ 44 int (*index)(const struct rsc *rsc); /* Return the index of resource */ 45 /* Return the output slot number */ 46 int (*output_slot)(const struct rsc *rsc); 47}; 48 49int 50rsc_init(struct rsc *rsc, u32 idx, enum RSCTYP type, u32 msr, struct hw *hw); 51int rsc_uninit(struct rsc *rsc); 52 53struct rsc_mgr { 54 enum RSCTYP type; /* The type (RSCTYP) of resource to manage */ 55 unsigned int amount; /* The total amount of a kind of resource */ 56 unsigned int avail; /* The amount of currently available resources */ 57 unsigned char *rscs; /* The bit-map for resource allocation */ 58 void *ctrl_blk; /* Chip specific control info block */ 59 struct hw *hw; /* Chip specific object for hardware access */ 60}; 61 62/* Resource management is based on bit-map mechanism */ 63int rsc_mgr_init(struct rsc_mgr *mgr, enum RSCTYP type, 64 unsigned int amount, struct hw *hw); 65int rsc_mgr_uninit(struct rsc_mgr *mgr); 66int mgr_get_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int *ridx); 67int mgr_put_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int idx); 68 69#endif /* CTRESOURCE_H */