sound/pci/ctxfi/ctresource.h

   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 */