LXR linux/sound/pci/ctxfi/cthardware.c

   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        cthardware.c
   9 *
  10 * @Brief
  11 * This file contains the implementation of hardware access methord.
  12 *
  13 * @Author      Liu Chun
  14 * @Date        Jun 26 2008
  15 *
  16 */
  17
  18#include "cthardware.h"
  19#include "cthw20k1.h"
  20#include "cthw20k2.h"
  21#include <linux/bug.h>
  22
  23int __devinit create_hw_obj(struct pci_dev *pci, enum CHIPTYP chip_type,
  24                            enum CTCARDS model, struct hw **rhw)
  25{
  26        int err;
  27
  28        switch (chip_type) {
  29        case ATC20K1:
  30                err = create_20k1_hw_obj(rhw);
  31                break;
  32        case ATC20K2:
  33                err = create_20k2_hw_obj(rhw);
  34                break;
  35        default:
  36                err = -ENODEV;
  37                break;
  38        }
  39        if (err)
  40                return err;
  41
  42        (*rhw)->pci = pci;
  43        (*rhw)->chip_type = chip_type;
  44        (*rhw)->model = model;
  45
  46        return 0;
  47}
  48
  49int destroy_hw_obj(struct hw *hw)
  50{
  51        int err;
  52
  53        switch (hw->pci->device) {
  54        case 0x0005:    /* 20k1 device */
  55                err = destroy_20k1_hw_obj(hw);
  56                break;
  57        case 0x000B:    /* 20k2 device */
  58                err = destroy_20k2_hw_obj(hw);
  59                break;
  60        default:
  61                err = -ENODEV;
  62                break;
  63        }
  64
  65        return err;
  66}
  67
  68unsigned int get_field(unsigned int data, unsigned int field)
  69{
  70        int i;
  71
  72        BUG_ON(!field);
  73        /* @field should always be greater than 0 */
  74        for (i = 0; !(field & (1 << i)); )
  75                i++;
  76
  77        return (data & field) >> i;
  78}
  79
  80void set_field(unsigned int *data, unsigned int field, unsigned int value)
  81{
  82        int i;
  83
  84        BUG_ON(!field);
  85        /* @field should always be greater than 0 */
  86        for (i = 0; !(field & (1 << i)); )
  87                i++;
  88
  89        *data = (*data & (~field)) | ((value << i) & field);
  90}
  91
  92