xref: /openbmc/linux/sound/pci/ctxfi/ctresource.h (revision a2cce7a9)
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 	struct hw *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
54 rsc_init(struct rsc *rsc, u32 idx, enum RSCTYP type, u32 msr, struct hw *hw);
55 int rsc_uninit(struct rsc *rsc);
56 
57 struct rsc_mgr {
58 	enum RSCTYP type; /* The type (RSCTYP) of resource to manage */
59 	unsigned int amount; /* The total amount of a kind of resource */
60 	unsigned int avail; /* The amount of currently available resources */
61 	unsigned char *rscs; /* The bit-map for resource allocation */
62 	void *ctrl_blk; /* Chip specific control info block */
63 	struct hw *hw; /* Chip specific object for hardware access */
64 };
65 
66 /* Resource management is based on bit-map mechanism */
67 int rsc_mgr_init(struct rsc_mgr *mgr, enum RSCTYP type,
68 		 unsigned int amount, struct hw *hw);
69 int rsc_mgr_uninit(struct rsc_mgr *mgr);
70 int mgr_get_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int *ridx);
71 int mgr_put_resource(struct rsc_mgr *mgr, unsigned int n, unsigned int idx);
72 
73 #endif /* CTRESOURCE_H */
74