Return to BMacEnetHW.m CVS log

Up to [Apple Darwin 0.x] / kernel / bsd / dev / ppc / drvBMacEnet

Annotation of kernel/bsd/dev/ppc/drvBMacEnet/BMacEnetHW.m, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /*
        !            26:  * Copyright (c) 1998-1999 by Apple Computer, Inc., All rights reserved.
        !            27:  *
        !            28:  * Miscellaneous definitions for the BMac Ethernet controller.
        !            29:  *
        !            30:  * HISTORY
        !            31:  *
        !            32:  */
        !            33: 
        !            34: #import "BMacEnetRegisters.h"
        !            35: #import "BMacEnetPrivate.h"
        !            36: 
        !            37: 
        !            38: void WriteBigMacRegister( IOPPCAddress ioBaseEnet, u_int32_t reg_offset, u_int16_t data )
        !            39: {
        !            40:   WriteSwap16( ioBaseEnet, reg_offset, data );
        !            41:   eieio();
        !            42: }
        !            43: 
        !            44: 
        !            45: volatile u_int16_t ReadBigMacRegister( IOPPCAddress ioBaseEnet, u_int32_t reg_offset )
        !            46: {
        !            47:   return ReadSwap16( ioBaseEnet, reg_offset ); 
        !            48: }
        !            49: 
        !            50: /*
        !            51:  * Procedure for reading EEPROM 
        !            52:  */
        !            53: #define kSROMAddressLength             5
        !            54: #define kDataInOn                      0x0008
        !            55: #define kDataInOff                     0x0000
        !            56: #define kClk                           0x0002
        !            57: #define kChipSelect                    0x0001
        !            58: #define kSDIShiftCount                 3
        !            59: #define kSD0ShiftCount                 2
        !            60: #define        kDelayValue                     1000                            // number of microseconds
        !            61: 
        !            62: #define kSROMStartOffset               10                              // this is in words
        !            63: #define kSROMReadCount                 3                               // number of words to read from SROM 
        !            64: 
        !            65: unsigned char clock_out_bit(IOPPCAddress base)
        !            66: {
        !            67:     u_int16_t         data;
        !            68:     u_int16_t         val;
        !            69: 
        !            70:     WriteBigMacRegister(base, kSROMCSR, kChipSelect | kClk);
        !            71:     IODelay(kDelayValue);
        !            72:     
        !            73:     data = ReadBigMacRegister(base, kSROMCSR);
        !            74:     IODelay(kDelayValue);
        !            75:     val = (data >> kSD0ShiftCount) & 1;
        !            76: 
        !            77:     WriteBigMacRegister(base, kSROMCSR, kChipSelect);
        !            78:     IODelay(kDelayValue);
        !            79:     
        !            80:     return val;
        !            81: }
        !            82: 
        !            83: void clock_in_bit(IOPPCAddress base, unsigned int val)
        !            84: {
        !            85:     u_int16_t          data;    
        !            86: 
        !            87:     if (val != 0 && val != 1)  
        !            88:     {
        !            89:        IOLog("bogus data in clock_in_bit\n");
        !            90:        return;
        !            91:     }
        !            92:     
        !            93:     data = (val << kSDIShiftCount);
        !            94:     WriteBigMacRegister(base, kSROMCSR, data | kChipSelect  );
        !            95:     IODelay(kDelayValue);
        !            96:     
        !            97:     WriteBigMacRegister(base, kSROMCSR, data | kChipSelect | kClk );
        !            98:     IODelay(kDelayValue);
        !            99: 
        !           100:     WriteBigMacRegister(base, kSROMCSR, data | kChipSelect);
        !           101:     IODelay(kDelayValue);
        !           102: }
        !           103: 
        !           104: void reset_and_select_srom(IOPPCAddress base)
        !           105: {
        !           106:     /* first reset */
        !           107:     WriteBigMacRegister(base, kSROMCSR, 0);
        !           108:     IODelay(kDelayValue);
        !           109:     
        !           110:     /* send it the read command (110) */
        !           111:     clock_in_bit(base, 1);
        !           112:     clock_in_bit(base, 1);
        !           113:     clock_in_bit(base, 0);
        !           114: }
        !           115: 
        !           116: unsigned short read_srom(IOPPCAddress base, unsigned int addr, unsigned int addr_len)
        !           117: {
        !           118:     unsigned short data, val;
        !           119:     int i;
        !           120:     
        !           121:     /* send out the address we want to read from */
        !           122:     for (i = 0; i < addr_len; i++)     {
        !           123:        val = addr >> (addr_len-i-1);
        !           124:        clock_in_bit(base, val & 1);
        !           125:     }
        !           126:     
        !           127:     /* Now read in the 16-bit data */
        !           128:     data = 0;
        !           129:     for (i = 0; i < 16; i++)   {
        !           130:        val = clock_out_bit(base);
        !           131:        data <<= 1;
        !           132:        data |= val;
        !           133:     }
        !           134:     WriteBigMacRegister(base, kSROMCSR, 0);
        !           135:     
        !           136:     return data;
        !           137: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.