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1 /*
2 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * The contents of this file constitute Original Code as defined in and
7 * are subject to the Apple Public Source License Version 1.1 (the
8 * "License"). You may not use this file except in compliance with the
9 * License. Please obtain a copy of the License at
10 * http://www.apple.com/publicsource and read it before using this file.
11 *
12 * This Original Code and all software distributed under the License are
13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17 * License for the specific language governing rights and limitations
18 * under the License.
19 *
20 * @APPLE_LICENSE_HEADER_END@
21 */
22
23 /* Sym8xxMisc.m created by russb2 on Sat 30-May-1998 */
24
25 #include "Sym8xxController.h"
26
27 /*
28 * Miscellaneous IO worker routines
29 */
30
31 UInt32 Sym8xxSCSIController::Sym8xxReadRegs( volatile UInt8 *chipRegs, UInt32 regOffset, UInt32 regSize )
32 {
33 if ( regSize == 1 )
34 {
35 return chipRegs[regOffset];
36 }
37 if ( regSize == 2 )
38 {
39 return OSSwapHostToLittleInt16( *(volatile u_int16_t *)&chipRegs[regOffset] );
40 }
41 else if (regSize == 4 )
42 {
43 return OSSwapHostToLittleInt32( *(volatile UInt32 *)&chipRegs[regOffset] );
44 }
45 else
46 {
47 kprintf("SCSI(SymBios875): Sym8xxReadRegs incorrect regSize\n\r" );
48 return 0;
49 }
50 }
51
52 void Sym8xxSCSIController::Sym8xxWriteRegs( volatile UInt8 *chipRegs, UInt32 regOffset, UInt32 regSize, UInt32 regValue )
53 {
54 if ( regSize == 1 )
55 {
56 chipRegs[regOffset] = regValue;
57 }
58 else if ( regSize == 2 )
59 {
60 volatile u_int16_t *p = (volatile u_int16_t *)&chipRegs[regOffset];
61 *p = OSSwapHostToLittleInt16( regValue );
62 }
63 else if ( regSize == 4 )
64 {
65 volatile UInt32 *p = (volatile UInt32 *)&chipRegs[regOffset];
66 *p = OSSwapHostToLittleInt32( regValue );
67 }
68 else
69 {
70 kprintf("SCSI(SymBios875): Sym8xxWriteRegs incorrect regSize\n\r" );
71 }
72 eieio();
73 }