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