1 /** 2 * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved. 3 * 4 * This source file is released under GPL v2 license (no other versions). 5 * See the COPYING file included in the main directory of this source 6 * distribution for the license terms and conditions. 7 * 8 * @File ctresource.h 9 * 10 * @Brief 11 * This file contains the definition of generic hardware resources for 12 * resource management. 13 * 14 * @Author Liu Chun 15 * @Date May 13 2008 16 * 17 */ 18 19 #ifndef CTRESOURCE_H 20 #define CTRESOURCE_H 21 22 #include <linux/types.h> 23 24 enum RSCTYP { 25 SRC, 26 SRCIMP, 27 AMIXER, 28 SUM, 29 DAIO, 30 NUM_RSCTYP /* This must be the last one and less than 16 */ 31 }; 32 33 struct rsc_ops; 34 35 struct rsc { 36 u32 idx:12; /* The index of a resource */ 37 u32 type:4; /* The type (RSCTYP) of a resource */ 38 u32 conj:12; /* Current conjugate index */ 39 u32 msr:4; /* The Master Sample Rate a resource working on */ 40 void *ctrl_blk; /* Chip specific control info block for a resource */ 41 void *hw; /* Chip specific object for hardware access means */ 42 struct rsc_ops *ops; /* Generic resource operations */ 43 }; 44 45 struct rsc_ops { 46 int (*master)(struct rsc *rsc); /* Move to master resource */ 47 int (*next_conj)(struct rsc *rsc); /* Move to next conjugate resource */ 48 int (*index)(const struct rsc *rsc); /* Return the index of resource */ 49 /* Return the output slot number */ 50 int (*output_slot)(const struct rsc *rsc); 51 }; 52 53 int rsc_init(struct rsc *rsc, u32 idx, enum RSCTYP type, u32 msr, void *hw); 54 int rsc_uninit(struct rsc *rsc); 55 56 struct rsc_mgr { 57 enum RSCTYP type; /* The type (RSCTYP) of resource to manage */ 58 unsigned int amount; /* The total amount of a kind of resource */ 59 unsigned int avail; /* The amount of currently available resources */ 60 unsigned char *rscs; /* The bit-map for resource allocation */ 61 void *ctrl_blk; /* Chip specific control info block */ 62 void *hw; /* Chip specific object for hardware access */ 63 }; 64 65 /* Resource management is based on bit-map mechanism */ 66 int rsc_mgr_init(struct rsc_mgr *mgr, enum RSCTYP type, 67 unsigned int amount, void *hw); 68 int rsc_mgr_uninit(struct rsc_mgr *mgr); 69 int mgr_get_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int *ridx); 70 int mgr_put_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int idx); 71 72 #endif /* CTRESOURCE_H */ 73