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Annotation of kernel/bsd/dev/ppc/drvDECchip21040/DECchip2104xInline.h, 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) 1995-1996 NeXT Software, Inc.
        !            27:  *
        !            28:  * Inline definitions for the DECchip 21X40.
        !            29:  *
        !            30:  * HISTORY
        !            31:  *
        !            32:  * 26-Apr-95   Rakesh Dubey (rdubey) at NeXT 
        !            33:  *     Created.
        !            34:  */
        !            35: 
        !            36: #import <machdep/ppc/proc_reg.h>
        !            37: #import "DECchip2104xRegisters.h"
        !            38: 
        !            39: //#define DEBUG
        !            40: 
        !            41: static __inline__
        !            42: unsigned int readCsr(IOPPCAddress base, unsigned short offset)
        !            43: {
        !            44:     unsigned int data;
        !            45: //kprintf("R%8x:", base + offset);
        !            46:     data = lwbrx(base + offset);
        !            47: //kprintf("%8x ", data);
        !            48:     
        !            49:     return data;
        !            50: }
        !            51: 
        !            52: static __inline__
        !            53: void writeCsr(IOPPCAddress base, unsigned short offset, 
        !            54:                unsigned int value)
        !            55: {
        !            56: //kprintf("W%8x:%8x ", base + offset, value);
        !            57:     stwbrx(value, base + offset);
        !            58:     eieio();
        !            59: }
        !            60: 
        !            61: static __inline__
        !            62: void getStationAddress(IOPPCAddress base, enet_addr_t *ea)
        !            63: {
        !            64:     int i;
        !            65:     csrRegUnion reg;
        !            66:     
        !            67:     writeCsr(base, DEC_21X40_CSR9, 0x0);
        !            68:     for (i = 0; i < sizeof (*ea); i++) {
        !            69:        do      {
        !            70:            reg.data = readCsr(base, DEC_21X40_CSR9);
        !            71:            IOSleep(1);
        !            72:        } while (reg.csr90.dtnv == YES);
        !            73:        ea->ea_byte[i] = reg.csr90.dt;
        !            74:     }
        !            75: }
        !            76: 
        !            77: 
        !            78: /*
        !            79:  * If this procedure for reading EEPROM seems arcane to you, see the DEC's
        !            80:  * Hardware Reference Manual for DECchip21140. 
        !            81:  */
        !            82: static __inline__
        !            83: unsigned char clock_out_bit(IOPPCAddress base)
        !            84: {
        !            85:     csrRegUnion reg;
        !            86:     unsigned char val;
        !            87:     
        !            88:     reg.data = 0x00004800;
        !            89:     
        !            90:     reg.csr91.scs = 1; reg.csr91.sclk = 1;
        !            91:     writeCsr(base, DEC_21X40_CSR9, reg.data);
        !            92:     IODelay(250);
        !            93:     
        !            94:     reg.data = readCsr(base, DEC_21X40_CSR9);
        !            95:     IODelay(250);
        !            96:     val = reg.csr91.sdo;
        !            97: 
        !            98:     reg.data = 0x00004800;
        !            99:     reg.csr91.scs = 1; reg.csr91.sclk = 0;
        !           100:     writeCsr(base, DEC_21X40_CSR9, reg.data);
        !           101:     IODelay(250);
        !           102:     
        !           103:     return val;
        !           104: }
        !           105: 
        !           106: static __inline__
        !           107: void clock_in_bit(IOPPCAddress base , unsigned int val)
        !           108: {
        !           109:     csrRegUnion reg;
        !           110:     
        !           111:     reg.data = 0x00004800;
        !           112:     
        !           113:     if (val != 0 && val != 1)  {
        !           114:        IOLog("bogus data in clock_in_bit\n");
        !           115:        return;
        !           116:     }
        !           117:     
        !           118:     reg.csr91.sdi = val;
        !           119:     
        !           120:     reg.csr91.scs = 1; reg.csr91.sclk = 0;
        !           121:     writeCsr(base, DEC_21X40_CSR9, reg.data);
        !           122:     IODelay(250);
        !           123:     
        !           124:     reg.csr91.scs = 1; reg.csr91.sclk = 1;
        !           125:     writeCsr(base, DEC_21X40_CSR9, reg.data);
        !           126:     IODelay(250);
        !           127: 
        !           128:     reg.csr91.scs = 1; reg.csr91.sclk = 0;
        !           129:     writeCsr(base, DEC_21X40_CSR9, reg.data);
        !           130:     IODelay(250);
        !           131: }
        !           132: 
        !           133: static __inline__
        !           134: void reset_and_select_srom(IOPPCAddress base)
        !           135: {
        !           136:     csrRegUnion reg;
        !           137:     
        !           138:     reg.data = 0x00004800;
        !           139:     
        !           140:     /* first reset */
        !           141:     writeCsr(base, DEC_21X40_CSR9, reg.data);
        !           142:     IODelay(250);
        !           143:     
        !           144:     /* select the serial rom */
        !           145:     clock_in_bit(base, 0);
        !           146:     
        !           147:     /* send it the read command (110) */
        !           148:     clock_in_bit(base, 1);
        !           149:     clock_in_bit(base, 1);
        !           150:     clock_in_bit(base, 0);
        !           151: }
        !           152: 
        !           153: static __inline__
        !           154: unsigned short read_srom(IOPPCAddress base, unsigned int addr,
        !           155:        unsigned int addr_len)
        !           156: {
        !           157:     unsigned short data, val;
        !           158:     int i;
        !           159:     
        !           160:     /* send out the address we want to read from */
        !           161:     for (i = 0; i < addr_len; i++)     {
        !           162:        val = addr >> (addr_len-i-1);
        !           163:        clock_in_bit(base, val & 1);
        !           164:     }
        !           165:     
        !           166:     /* Now read in the 16-bit data */
        !           167:     data = 0;
        !           168:     for (i = 0; i < 16; i++)   {
        !           169:        val = clock_out_bit(base);
        !           170:        data <<= 1;
        !           171:        data |= val;
        !           172:     }
        !           173:     
        !           174:     return data;
        !           175: }
        !           176: 
        !           177: static __inline__
        !           178: unsigned int
        !           179: _atoi(const char *s)
        !           180: {
        !           181:     char   *cptr;
        !           182:     unsigned int val;
        !           183: 
        !           184:     cptr = (char *)s;
        !           185:     while (*cptr && ((*cptr == ' ') || (*cptr == '\t') || (*cptr == '\n')))
        !           186:        cptr++;
        !           187: 
        !           188:     val = 0;
        !           189:     if (*cptr == '\0')
        !           190:        return 0;
        !           191:                
        !           192:     while ((*cptr != ' ') && (*cptr != '\t') && (*cptr != '\n'))       {
        !           193:        
        !           194:        if ((*cptr >= '0') && (*cptr <= '9'))
        !           195:            val = val * 10 + (*cptr - '0');
        !           196:            
        !           197:        ++cptr;
        !           198:        
        !           199:        if (*cptr == '\0')
        !           200:            break;
        !           201:     }
        !           202:     
        !           203:     return val;
        !           204: }
        !           205: 
        !           206: 
        !           207: /*
        !           208:  * Useful for testing. 
        !           209:  */
        !           210: static __inline__
        !           211: void _dump_srom(IOPPCAddress base, unsigned char sromAddressBits)
        !           212: {
        !           213:     unsigned short data;
        !           214:     int i;
        !           215:        
        !           216:     for (i = 0; i < 128; i++)  {
        !           217:        reset_and_select_srom(base);
        !           218:        data = read_srom(base, i, sromAddressBits);
        !           219:        IOLog("%x = %x ", i, data);
        !           220:        if (i % 10 == 0) IOLog("\n");
        !           221:     }
        !           222: }
        !           223: 
        !           224: 
        !           225: 

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