| Wai Yew CHAY | 8cc7236 | 2009-05-14 08:05:58 +0200 | [diff] [blame] | 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 */ |