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