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kernel add
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/**
* Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
*
* This source file is released under GPL v2 license (no other versions).
* See the COPYING file included in the main directory of this source
* distribution for the license terms and conditions.
*
* @File cthardware.c
*
* @Brief
* This file contains the implementation of hardware access methord.
*
* @Author Liu Chun
* @Date Jun 26 2008
*
*/
#include "cthardware.h"
#include "cthw20k1.h"
#include "cthw20k2.h"
#include <linux/bug.h>
int create_hw_obj(struct pci_dev *pci, enum CHIPTYP chip_type,
enum CTCARDS model, struct hw **rhw)
{
int err;
switch (chip_type) {
case ATC20K1:
err = create_20k1_hw_obj(rhw);
break;
case ATC20K2:
err = create_20k2_hw_obj(rhw);
break;
default:
err = -ENODEV;
break;
}
if (err)
return err;
(*rhw)->pci = pci;
(*rhw)->chip_type = chip_type;
(*rhw)->model = model;
return 0;
}
int destroy_hw_obj(struct hw *hw)
{
int err;
switch (hw->pci->device) {
case 0x0005: /* 20k1 device */
err = destroy_20k1_hw_obj(hw);
break;
case 0x000B: /* 20k2 device */
err = destroy_20k2_hw_obj(hw);
break;
default:
err = -ENODEV;
break;
}
return err;
}
unsigned int get_field(unsigned int data, unsigned int field)
{
int i;
if (WARN_ON(!field))
return 0;
/* @field should always be greater than 0 */
for (i = 0; !(field & (1 << i)); )
i++;
return (data & field) >> i;
}
void set_field(unsigned int *data, unsigned int field, unsigned int value)
{
int i;
if (WARN_ON(!field))
return;
/* @field should always be greater than 0 */
for (i = 0; !(field & (1 << i)); )
i++;
*data = (*data & (~field)) | ((value << i) & field);
}
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