root/sound/pci/ctxfi/cthardware.c

DEFINITIONS

1. create_hw_obj
2. destroy_hw_obj
3. get_field
4. set_field

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /**
   3  * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
   4  *
   5  * @File        cthardware.c
   6  *
   7  * @Brief
   8  * This file contains the implementation of hardware access methord.
   9  *
  10  * @Author      Liu Chun
  11  * @Date        Jun 26 2008
  12  */
  13 
  14 #include "cthardware.h"
  15 #include "cthw20k1.h"
  16 #include "cthw20k2.h"
  17 #include <linux/bug.h>
  18 
  19 int create_hw_obj(struct pci_dev *pci, enum CHIPTYP chip_type,
  20                   enum CTCARDS model, struct hw **rhw)
  21 {
  22         int err;
  23 
  24         switch (chip_type) {
  25         case ATC20K1:
  26                 err = create_20k1_hw_obj(rhw);
  27                 break;
  28         case ATC20K2:
  29                 err = create_20k2_hw_obj(rhw);
  30                 break;
  31         default:
  32                 err = -ENODEV;
  33                 break;
  34         }
  35         if (err)
  36                 return err;
  37 
  38         (*rhw)->pci = pci;
  39         (*rhw)->chip_type = chip_type;
  40         (*rhw)->model = model;
  41 
  42         return 0;
  43 }
  44 
  45 int destroy_hw_obj(struct hw *hw)
  46 {
  47         int err;
  48 
  49         switch (hw->pci->device) {
  50         case 0x0005:    /* 20k1 device */
  51                 err = destroy_20k1_hw_obj(hw);
  52                 break;
  53         case 0x000B:    /* 20k2 device */
  54                 err = destroy_20k2_hw_obj(hw);
  55                 break;
  56         default:
  57                 err = -ENODEV;
  58                 break;
  59         }
  60 
  61         return err;
  62 }
  63 
  64 unsigned int get_field(unsigned int data, unsigned int field)
  65 {
  66         int i;
  67 
  68         if (WARN_ON(!field))
  69                 return 0;
  70         /* @field should always be greater than 0 */
  71         for (i = 0; !(field & (1 << i)); )
  72                 i++;
  73 
  74         return (data & field) >> i;
  75 }
  76 
  77 void set_field(unsigned int *data, unsigned int field, unsigned int value)
  78 {
  79         int i;
  80 
  81         if (WARN_ON(!field))
  82                 return;
  83         /* @field should always be greater than 0 */
  84         for (i = 0; !(field & (1 << i)); )
  85                 i++;
  86 
  87         *data = (*data & (~field)) | ((value << i) & field);
  88 }
  89