drivers/rtl8019.c

   1 /*
   2  * Realtek 8019AS Ethernet
   3  * (C) Copyright 2002-2003
   4  * Xue Ligong(lgxue@hotmail.com),Wang Kehao, ESLAB, whut.edu.cn
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 /*
  26  * This code works in 8bit mode.
  27  * If you need to work in 16bit mode, PLS change it!
  28  */
  29
  30 #include <common.h>
  31 #include <command.h>
  32 #include "rtl8019.h"
  33 #include <net.h>
  34
  35 #ifdef CONFIG_DRIVER_RTL8019
  36
  37 #if (CONFIG_COMMANDS & CFG_CMD_NET)
  38
  39
  40 /* packet page register access functions */
  41
  42
  43 static unsigned char get_reg (unsigned int regno)
  44 {
  45         return (*(unsigned char *) regno);
  46 }
  47
  48
  49 static void put_reg (unsigned int regno, unsigned char val)
  50 {
  51         *(volatile unsigned char *) regno = val;
  52 }
  53
  54 static void eth_reset (void)
  55 {
  56         unsigned char ucTemp;
  57
  58         /* reset NIC */
  59         ucTemp = get_reg (RTL8019_RESET);
  60         put_reg (RTL8019_RESET, ucTemp);
  61         put_reg (RTL8019_INTERRUPTSTATUS, 0xff);
  62         udelay (2000);          /* wait for 2ms */
  63 }
  64
  65 void rtl8019_get_enetaddr (uchar * addr)
  66 {
  67         unsigned char i;
  68         unsigned char temp;
  69
  70         eth_reset ();
  71
  72         put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
  73         put_reg (RTL8019_DATACONFIGURATION, 0x48);
  74         put_reg (RTL8019_REMOTESTARTADDRESS0, 0x00);
  75         put_reg (RTL8019_REMOTESTARTADDRESS1, 0x00);
  76         put_reg (RTL8019_REMOTEBYTECOUNT0, 12);
  77         put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
  78         put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
  79         printf ("MAC: ");
  80         for (i = 0; i < 6; i++) {
  81                 temp = get_reg (RTL8019_DMA_DATA);
  82                 *addr++ = temp;
  83                 temp = get_reg (RTL8019_DMA_DATA);
  84                 printf ("%x:", temp);
  85         }
  86
  87         while ((!get_reg (RTL8019_INTERRUPTSTATUS) & 0x40));
  88         printf ("\b \n");
  89         put_reg (RTL8019_REMOTEBYTECOUNT0, 0x00);
  90         put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
  91         put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
  92 }
  93
  94
  95 void eth_halt (void)
  96 {
  97         put_reg (RTL8019_COMMAND, 0x01);
  98 }
  99
 100 int eth_init (bd_t * bd)
 101 {
 102         eth_reset ();
 103         put_reg (RTL8019_COMMAND, RTL8019_PAGE0STOP);
 104         put_reg (RTL8019_DATACONFIGURATION, 0x48);
 105         put_reg (RTL8019_REMOTEBYTECOUNT0, 0x00);
 106         put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
 107         put_reg (RTL8019_RECEIVECONFIGURATION, 0x00);   /*00; */
 108         put_reg (RTL8019_TRANSMITPAGE, RTL8019_TPSTART);
 109         put_reg (RTL8019_TRANSMITCONFIGURATION, 0x02);
 110         put_reg (RTL8019_PAGESTART, RTL8019_PSTART);
 111         put_reg (RTL8019_BOUNDARY, RTL8019_PSTART);
 112         put_reg (RTL8019_PAGESTOP, RTL8019_PSTOP);
 113         put_reg (RTL8019_INTERRUPTSTATUS, 0xff);
 114         put_reg (RTL8019_INTERRUPTMASK, 0x11);  /*b; */
 115         put_reg (RTL8019_COMMAND, RTL8019_PAGE1STOP);
 116         put_reg (RTL8019_PHYSICALADDRESS0, bd->bi_enetaddr[0]);
 117         put_reg (RTL8019_PHYSICALADDRESS1, bd->bi_enetaddr[1]);
 118         put_reg (RTL8019_PHYSICALADDRESS2, bd->bi_enetaddr[2]);
 119         put_reg (RTL8019_PHYSICALADDRESS3, bd->bi_enetaddr[3]);
 120         put_reg (RTL8019_PHYSICALADDRESS4, bd->bi_enetaddr[4]);
 121         put_reg (RTL8019_PHYSICALADDRESS5, bd->bi_enetaddr[5]);
 122         put_reg (RTL8019_MULTIADDRESS0, 0x00);
 123         put_reg (RTL8019_MULTIADDRESS1, 0x00);
 124         put_reg (RTL8019_MULTIADDRESS2, 0x00);
 125         put_reg (RTL8019_MULTIADDRESS3, 0x00);
 126         put_reg (RTL8019_MULTIADDRESS4, 0x00);
 127         put_reg (RTL8019_MULTIADDRESS5, 0x00);
 128         put_reg (RTL8019_MULTIADDRESS6, 0x00);
 129         put_reg (RTL8019_MULTIADDRESS7, 0x00);
 130         put_reg (RTL8019_CURRENT, RTL8019_PSTART);
 131         put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
 132         put_reg (RTL8019_TRANSMITCONFIGURATION, 0xe0);  /*58; */
 133
 134         return 0;
 135 }
 136
 137
 138 static unsigned char nic_to_pc (void)
 139 {
 140         unsigned char rec_head_status;
 141         unsigned char next_packet_pointer;
 142         unsigned char packet_length0;
 143         unsigned char packet_length1;
 144         unsigned short rxlen = 0;
 145         unsigned int i = 4;
 146         unsigned char current_point;
 147         unsigned char *addr;
 148
 149         /*
 150          * The RTL8019's first 4B is packet status,page of next packet
 151          * and packet length(2B).So we receive the fist 4B.
 152          */
 153         put_reg (RTL8019_REMOTESTARTADDRESS1, get_reg (RTL8019_BOUNDARY));
 154         put_reg (RTL8019_REMOTESTARTADDRESS0, 0x00);
 155         put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
 156         put_reg (RTL8019_REMOTEBYTECOUNT0, 0x04);
 157
 158         put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
 159
 160         rec_head_status = get_reg (RTL8019_DMA_DATA);
 161         next_packet_pointer = get_reg (RTL8019_DMA_DATA);
 162         packet_length0 = get_reg (RTL8019_DMA_DATA);
 163         packet_length1 = get_reg (RTL8019_DMA_DATA);
 164
 165         put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
 166         /*Packet length is in two 8bit registers */
 167         rxlen = packet_length1;
 168         rxlen = (((rxlen << 8) & 0xff00) + packet_length0);
 169         rxlen -= 4;
 170
 171         if (rxlen > PKTSIZE_ALIGN + PKTALIGN)
 172                 printf ("packet too big!\n");
 173
 174         /*Receive the packet */
 175         put_reg (RTL8019_REMOTESTARTADDRESS0, 0x04);
 176         put_reg (RTL8019_REMOTESTARTADDRESS1, get_reg (RTL8019_BOUNDARY));
 177
 178         put_reg (RTL8019_REMOTEBYTECOUNT0, (rxlen & 0xff));
 179         put_reg (RTL8019_REMOTEBYTECOUNT1, ((rxlen >> 8) & 0xff));
 180
 181
 182         put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
 183
 184         for (addr = (unsigned char *) NetRxPackets[0], i = rxlen; i > 0; i--)
 185                 *addr++ = get_reg (RTL8019_DMA_DATA);
 186         /* Pass the packet up to the protocol layers. */
 187         NetReceive (NetRxPackets[0], rxlen);
 188
 189         while (!(get_reg (RTL8019_INTERRUPTSTATUS)) & 0x40);    /* wait for the op. */
 190
 191         /*
 192          * To test whether the packets are all received,get the
 193          * location of current point
 194          */
 195         put_reg (RTL8019_COMMAND, RTL8019_PAGE1);
 196         current_point = get_reg (RTL8019_CURRENT);
 197         put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
 198         put_reg (RTL8019_BOUNDARY, next_packet_pointer);
 199         return current_point;
 200 }
 201
 202 /* Get a data block via Ethernet */
 203 extern int eth_rx (void)
 204 {
 205         unsigned char temp, current_point;
 206
 207         put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
 208
 209         while (1) {
 210                 temp = get_reg (RTL8019_INTERRUPTSTATUS);
 211
 212                 if (temp & 0x90) {
 213                         /*overflow */
 214                         put_reg (RTL8019_COMMAND, RTL8019_PAGE0STOP);
 215                         udelay (2000);
 216                         put_reg (RTL8019_REMOTEBYTECOUNT0, 0);
 217                         put_reg (RTL8019_REMOTEBYTECOUNT1, 0);
 218                         put_reg (RTL8019_TRANSMITCONFIGURATION, 2);
 219                         do {
 220                                 current_point = nic_to_pc ();
 221                         } while (get_reg (RTL8019_BOUNDARY) != current_point);
 222
 223                         put_reg (RTL8019_TRANSMITCONFIGURATION, 0xe0);
 224                 }
 225
 226                 if (temp & 0x1) {
 227                         /*packet received */
 228                         do {
 229                                 put_reg (RTL8019_INTERRUPTSTATUS, 0x01);
 230                                 current_point = nic_to_pc ();
 231                         } while (get_reg (RTL8019_BOUNDARY) != current_point);
 232                 }
 233
 234                 if (!(temp & 0x1))
 235                         return 0;
 236                 /* done and exit. */
 237         }
 238 }
 239
 240 /* Send a data block via Ethernet. */
 241 extern int eth_send (volatile void *packet, int length)
 242 {
 243         volatile unsigned char *p;
 244         unsigned int pn;
 245
 246         pn = length;
 247         p = (volatile unsigned char *) packet;
 248
 249         while (get_reg (RTL8019_COMMAND) == RTL8019_TRANSMIT);
 250
 251         put_reg (RTL8019_REMOTESTARTADDRESS0, 0);
 252         put_reg (RTL8019_REMOTESTARTADDRESS1, RTL8019_TPSTART);
 253         put_reg (RTL8019_REMOTEBYTECOUNT0, (pn & 0xff));
 254         put_reg (RTL8019_REMOTEBYTECOUNT1, ((pn >> 8) & 0xff));
 255
 256         put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMAWR);
 257         while (pn > 0) {
 258                 put_reg (RTL8019_DMA_DATA, *p++);
 259                 pn--;
 260         }
 261
 262         pn = length;
 263
 264         while (pn < 60) {       /*Padding */
 265                 put_reg (RTL8019_DMA_DATA, 0);
 266                 pn++;
 267         }
 268
 269         while (!(get_reg (RTL8019_INTERRUPTSTATUS)) & 0x40);
 270
 271         put_reg (RTL8019_INTERRUPTSTATUS, 0x40);
 272         put_reg (RTL8019_TRANSMITPAGE, RTL8019_TPSTART);
 273         put_reg (RTL8019_TRANSMITBYTECOUNT0, (pn & 0xff));
 274         put_reg (RTL8019_TRANSMITBYTECOUNT1, ((pn >> 8 & 0xff)));
 275         put_reg (RTL8019_COMMAND, RTL8019_TRANSMIT);
 276
 277         return 0;
 278 }
 279
 280 #endif /* COMMANDS & CFG_NET */
 281
 282 #endif /* CONFIG_DRIVER_RTL8019 */