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Annotation of XNU/iokit/Drivers/network/drvIntel82557/i82557eeprom.cpp, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1998-2000 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:  * Copyright (c) 1996 NeXT Software, Inc.
        !            24:  *
        !            25:  * i82557eeprom.m
        !            26:  * - Intel 82557 eeprom access object
        !            27:  *
        !            28:  * HISTORY
        !            29:  *
        !            30:  * 6-Mar-96    Dieter Siegmund (dieter) at NeXT
        !            31:  *             Created.
        !            32:  */
        !            33: 
        !            34: #include <IOKit/network/IOEthernetController.h>
        !            35: #include "i82557eeprom.h"
        !            36: 
        !            37: #define super OSObject
        !            38: OSDefineMetaClassAndStructors( i82557eeprom, OSObject )
        !            39: 
        !            40: static __inline__ void
        !            41: _logAddr(unsigned char * addr)
        !            42: {
        !            43:     int i;
        !            44:     for (i = 0; i < NUM_EN_ADDR_BYTES; i++) {
        !            45:                IOLog("%s%02x", i > 0 ? ":" : "", addr[i]);
        !            46:     }
        !            47:     return;
        !            48: }
        !            49: 
        !            50: void i82557eeprom::dumpContents()
        !            51: {
        !            52:        EEPROM_t * eeprom_p = &image.fields;
        !            53: 
        !            54:     IOLog("The EEPROM contains the following information:\n");
        !            55: 
        !            56:     IOLog("ethernet address: ");
        !            57:     _logAddr((unsigned char *) &eeprom_p->addr);
        !            58:     IOLog("\n");
        !            59: 
        !            60:        if (eeprom_p->compatibility_0 & EEPROM_C0_MC_10)
        !            61:                IOLog("compatibility: MCSETUP workaround required for 10 Mbits\n");
        !            62:     if (eeprom_p->compatibility_0 & EEPROM_C0_MC_100)
        !            63:                IOLog("compatibility: MCSETUP workaround required for 100 Mbits\n");
        !            64: 
        !            65:        IOLog("connectors: %s %s %s %s\n", 
        !            66:                eeprom_p->connectors & EEPROM_CON_RJ45 ? "RJ-45" : "",
        !            67:                eeprom_p->connectors & EEPROM_CON_BNC ? "BNC" : "",
        !            68:                eeprom_p->connectors & EEPROM_CON_AUI ? "AUI" : "",
        !            69:                eeprom_p->connectors & EEPROM_CON_MII ? "MII" : "");
        !            70: 
        !            71:     IOLog("controller type: %d\n", eeprom_p->controllerType);
        !            72: 
        !            73:        for (int i = 0; i < NUM_PHYS; i++) {
        !            74:                char * s = (i == PRIMARY_PHY) ? "primary" : "secondary";
        !            75:                UInt16 phy = OSReadLE16(&eeprom_p->phys[i]);
        !            76: 
        !            77:                IOLog("%s PHY: %s\n", s,
        !            78:                        PHYDeviceNames(CSR_VALUE(EEPROM_PHY_DEVICE, phy)));
        !            79:                if (CSR_VALUE(EEPROM_PHY_DEVICE, phy) != PHYDevice_None_e) {
        !            80:                        if (phy & EEPROM_PHY_VSCR)
        !            81:                                IOLog("%s PHY: vendor specific code required\n", s);
        !            82:                        if (phy & EEPROM_PHY_10)
        !            83:                                IOLog("%s PHY: 10 Mbits only, requires 503 interface\n", s);
        !            84:                        IOLog("%s PHY address: 0x%x\n", s,
        !            85:                                CSR_VALUE(EEPROM_PHY_ADDRESS, phy));
        !            86:                }
        !            87:     }
        !            88: 
        !            89:     IOLog("PWA Number: %d %d %d-0%d\n", eeprom_p->PWANumber[1],
        !            90:          eeprom_p->PWANumber[0], eeprom_p->PWANumber[3],
        !            91:          eeprom_p->PWANumber[2]);
        !            92: 
        !            93:     IOLog("Checksum: 0x%x\n", OSReadLE16(&eeprom_p->checkSum));
        !            94: #if 0
        !            95:     if (eeprom_p->checkSum != image.words[NUM_EEPROM_WORDS - 1])
        !            96:                IOLog("the checksum in the struct doesn't match that in the array\n");
        !            97: #endif 
        !            98:        return;
        !            99: }
        !           100: 
        !           101: i82557eeprom * i82557eeprom::withAddress(volatile eeprom_control_t * p)
        !           102: {
        !           103:     i82557eeprom * eeprom = new i82557eeprom;
        !           104: 
        !           105:     if (eeprom && !eeprom->initWithAddress(p)) {
        !           106:                eeprom->release();
        !           107:                return 0;
        !           108:     }
        !           109:     return eeprom;
        !           110: }
        !           111: 
        !           112: bool i82557eeprom::initWithAddress(volatile eeprom_control_t * p)
        !           113: {
        !           114:     int        i;
        !           115:     UInt16     sum;
        !           116: 
        !           117:     if (!super::init())
        !           118:                return false;
        !           119: 
        !           120:     ee_p = p;
        !           121: 
        !           122:     /*
        !           123:      * Find out the number of bits in the address by issuing a read to address
        !           124:      * 0 ie. keep feeding eeprom address bits with value 0, until the eeprom
        !           125:      * says that the address is complete.  It tells us by setting EEDO to 0 
        !           126:      * after a write cycle.
        !           127:      */
        !           128:     EEPROMEnable(ee_p);
        !           129:     EEPROMWriteBit(ee_p, 1); /* read */
        !           130:     EEPROMWriteBit(ee_p, 1);
        !           131:     EEPROMWriteBit(ee_p, 0);
        !           132:     nbits = 1;
        !           133: 
        !           134:     do {
        !           135:                EEPROMWriteBit(ee_p, 0);
        !           136:                if ((OSReadLE16(ee_p) & EEPROM_CONTROL_EEDO) == 0)
        !           137:                break;
        !           138:                nbits++;
        !           139:     } while (nbits <= 32);
        !           140: 
        !           141:        // IOLog("nbits: %d\n", nbits);
        !           142: 
        !           143:     EEPROMDisable(ee_p);
        !           144:     for (sum = 0, i = 0; i < NUM_EEPROM_WORDS; i++) {
        !           145:                UInt16 w = readWord(i);
        !           146:                sum += w;
        !           147:                OSWriteLE16(&image.words[i], w);
        !           148:     }
        !           149:     if (sum != EEPROM_CHECKSUM_VALUE) {
        !           150:                IOLog("i82557eeprom: checksum %x incorrect\n", sum);
        !           151:                return false;
        !           152:     }
        !           153: 
        !           154:     return true;
        !           155: }
        !           156: 
        !           157: /* READ command bit sequence: 1 1 0 a5a4a3a2a1a0 */
        !           158: UInt16 i82557eeprom::readWord(int offset)
        !           159: {
        !           160:     int        i;
        !           161:     UInt16     value;
        !           162: 
        !           163:     EEPROMEnable(ee_p);
        !           164:     EEPROMWriteBit(ee_p, 1);
        !           165:     EEPROMWriteBit(ee_p, 1);
        !           166:     EEPROMWriteBit(ee_p, 0);
        !           167:     for (i = (nbits - 1); i >= 0; i--) {
        !           168:                EEPROMWriteBit(ee_p, (offset >> i) & 1);
        !           169:     }
        !           170:     value = 0;
        !           171:     for (i = BITS_IN_SHORT - 1; i >= 0; i--) {
        !           172:                value |= (EEPROMReadBit(ee_p) << i);
        !           173:     }
        !           174:     EEPROMDisable(ee_p);
        !           175:     return (value);
        !           176: }
        !           177: 
        !           178: EEPROM_t * i82557eeprom::getContents()
        !           179: {
        !           180:     return (&image.fields);
        !           181: }
        !           182: 

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