// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
 *
 * @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);
}