drivers/net/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 defined(CONFIG_CMD_NET)
  38
  39 /* packet page register access functions */
  40
  41 static unsigned char get_reg (unsigned int regno)
  42 {
  43         return (*(unsigned char *) regno);
  44 }
  45
  46 static void put_reg (unsigned int regno, unsigned char val)
  47 {
  48         *(volatile unsigned char *) regno = val;
  49 }
  50
  51 static void eth_reset (void)
  52 {
  53         unsigned char ucTemp;
  54
  55         /* reset NIC */
  56         ucTemp = get_reg (RTL8019_RESET);
  57         put_reg (RTL8019_RESET, ucTemp);
  58         put_reg (RTL8019_INTERRUPTSTATUS, 0xff);
  59         udelay (2000);          /* wait for 2ms */
  60 }
  61
  62 void rtl8019_get_enetaddr (uchar * addr)
  63 {
  64         unsigned char i;
  65         unsigned char temp;
  66
  67         eth_reset ();
  68
  69         put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
  70         put_reg (RTL8019_DATACONFIGURATION, 0x48);
  71         put_reg (RTL8019_REMOTESTARTADDRESS0, 0x00);
  72         put_reg (RTL8019_REMOTESTARTADDRESS1, 0x00);
  73         put_reg (RTL8019_REMOTEBYTECOUNT0, 12);
  74         put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
  75         put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
  76         printf ("MAC: ");
  77         for (i = 0; i < 6; i++) {
  78                 temp = get_reg (RTL8019_DMA_DATA);
  79                 *addr++ = temp;
  80                 temp = get_reg (RTL8019_DMA_DATA);
  81                 printf ("%x:", temp);
  82         }
  83
  84         while ((!get_reg (RTL8019_INTERRUPTSTATUS) & 0x40));
  85         printf ("\b \n");
  86         put_reg (RTL8019_REMOTEBYTECOUNT0, 0x00);
  87         put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
  88         put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
  89 }
  90
  91 void eth_halt (void)
  92 {
  93         put_reg (RTL8019_COMMAND, 0x01);
  94 }
  95
  96 int eth_init (bd_t * bd)
  97 {
  98         eth_reset ();
  99         put_reg (RTL8019_COMMAND, RTL8019_PAGE0STOP);
 100         put_reg (RTL8019_DATACONFIGURATION, 0x48);
 101         put_reg (RTL8019_REMOTEBYTECOUNT0, 0x00);
 102         put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
 103         put_reg (RTL8019_RECEIVECONFIGURATION, 0x00);   /*00; */
 104         put_reg (RTL8019_TRANSMITPAGE, RTL8019_TPSTART);
 105         put_reg (RTL8019_TRANSMITCONFIGURATION, 0x02);
 106         put_reg (RTL8019_PAGESTART, RTL8019_PSTART);
 107         put_reg (RTL8019_BOUNDARY, RTL8019_PSTART);
 108         put_reg (RTL8019_PAGESTOP, RTL8019_PSTOP);
 109         put_reg (RTL8019_INTERRUPTSTATUS, 0xff);
 110         put_reg (RTL8019_INTERRUPTMASK, 0x11);  /*b; */
 111         put_reg (RTL8019_COMMAND, RTL8019_PAGE1STOP);
 112         put_reg (RTL8019_PHYSICALADDRESS0, bd->bi_enetaddr[0]);
 113         put_reg (RTL8019_PHYSICALADDRESS1, bd->bi_enetaddr[1]);
 114         put_reg (RTL8019_PHYSICALADDRESS2, bd->bi_enetaddr[2]);
 115         put_reg (RTL8019_PHYSICALADDRESS3, bd->bi_enetaddr[3]);
 116         put_reg (RTL8019_PHYSICALADDRESS4, bd->bi_enetaddr[4]);
 117         put_reg (RTL8019_PHYSICALADDRESS5, bd->bi_enetaddr[5]);
 118         put_reg (RTL8019_MULTIADDRESS0, 0x00);
 119         put_reg (RTL8019_MULTIADDRESS1, 0x00);
 120         put_reg (RTL8019_MULTIADDRESS2, 0x00);
 121         put_reg (RTL8019_MULTIADDRESS3, 0x00);
 122         put_reg (RTL8019_MULTIADDRESS4, 0x00);
 123         put_reg (RTL8019_MULTIADDRESS5, 0x00);
 124         put_reg (RTL8019_MULTIADDRESS6, 0x00);
 125         put_reg (RTL8019_MULTIADDRESS7, 0x00);
 126         put_reg (RTL8019_CURRENT, RTL8019_PSTART);
 127         put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
 128         put_reg (RTL8019_TRANSMITCONFIGURATION, 0xe0);  /*58; */
 129
 130         return 0;
 131 }
 132
 133 static unsigned char nic_to_pc (void)
 134 {
 135         unsigned char rec_head_status;
 136         unsigned char next_packet_pointer;
 137         unsigned char packet_length0;
 138         unsigned char packet_length1;
 139         unsigned short rxlen = 0;
 140         unsigned int i = 4;
 141         unsigned char current_point;
 142         unsigned char *addr;
 143
 144         /*
 145          * The RTL8019's first 4B is packet status,page of next packet
 146          * and packet length(2B).So we receive the fist 4B.
 147          */
 148         put_reg (RTL8019_REMOTESTARTADDRESS1, get_reg (RTL8019_BOUNDARY));
 149         put_reg (RTL8019_REMOTESTARTADDRESS0, 0x00);
 150         put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
 151         put_reg (RTL8019_REMOTEBYTECOUNT0, 0x04);
 152
 153         put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
 154
 155         rec_head_status = get_reg (RTL8019_DMA_DATA);
 156         next_packet_pointer = get_reg (RTL8019_DMA_DATA);
 157         packet_length0 = get_reg (RTL8019_DMA_DATA);
 158         packet_length1 = get_reg (RTL8019_DMA_DATA);
 159
 160         put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
 161         /*Packet length is in two 8bit registers */
 162         rxlen = packet_length1;
 163         rxlen = (((rxlen << 8) & 0xff00) + packet_length0);
 164         rxlen -= 4;
 165
 166         if (rxlen > PKTSIZE_ALIGN + PKTALIGN)
 167                 printf ("packet too big!\n");
 168
 169         /*Receive the packet */
 170         put_reg (RTL8019_REMOTESTARTADDRESS0, 0x04);
 171         put_reg (RTL8019_REMOTESTARTADDRESS1, get_reg (RTL8019_BOUNDARY));
 172
 173         put_reg (RTL8019_REMOTEBYTECOUNT0, (rxlen & 0xff));
 174         put_reg (RTL8019_REMOTEBYTECOUNT1, ((rxlen >> 8) & 0xff));
 175
 176
 177         put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
 178
 179         for (addr = (unsigned char *) NetRxPackets[0], i = rxlen; i > 0; i--)
 180                 *addr++ = get_reg (RTL8019_DMA_DATA);
 181         /* Pass the packet up to the protocol layers. */
 182         NetReceive (NetRxPackets[0], rxlen);
 183
 184         while (!(get_reg (RTL8019_INTERRUPTSTATUS)) & 0x40);    /* wait for the op. */
 185
 186         /*
 187          * To test whether the packets are all received,get the
 188          * location of current point
 189          */
 190         put_reg (RTL8019_COMMAND, RTL8019_PAGE1);
 191         current_point = get_reg (RTL8019_CURRENT);
 192         put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
 193         put_reg (RTL8019_BOUNDARY, next_packet_pointer);
 194         return current_point;
 195 }
 196
 197 /* Get a data block via Ethernet */
 198 extern int eth_rx (void)
 199 {
 200         unsigned char temp, current_point;
 201
 202         put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
 203
 204         while (1) {
 205                 temp = get_reg (RTL8019_INTERRUPTSTATUS);
 206
 207                 if (temp & 0x90) {
 208                         /*overflow */
 209                         put_reg (RTL8019_COMMAND, RTL8019_PAGE0STOP);
 210                         udelay (2000);
 211                         put_reg (RTL8019_REMOTEBYTECOUNT0, 0);
 212                         put_reg (RTL8019_REMOTEBYTECOUNT1, 0);
 213                         put_reg (RTL8019_TRANSMITCONFIGURATION, 2);
 214                         do {
 215                                 current_point = nic_to_pc ();
 216                         } while (get_reg (RTL8019_BOUNDARY) != current_point);
 217
 218                         put_reg (RTL8019_TRANSMITCONFIGURATION, 0xe0);
 219                 }
 220
 221                 if (temp & 0x1) {
 222                         /*packet received */
 223                         do {
 224                                 put_reg (RTL8019_INTERRUPTSTATUS, 0x01);
 225                                 current_point = nic_to_pc ();
 226                         } while (get_reg (RTL8019_BOUNDARY) != current_point);
 227                 }
 228
 229                 if (!(temp & 0x1))
 230                         return 0;
 231                 /* done and exit. */
 232         }
 233 }
 234
 235 /* Send a data block via Ethernet. */
 236 extern int eth_send (volatile void *packet, int length)
 237 {
 238         volatile unsigned char *p;
 239         unsigned int pn;
 240
 241         pn = length;
 242         p = (volatile unsigned char *) packet;
 243
 244         while (get_reg (RTL8019_COMMAND) == RTL8019_TRANSMIT);
 245
 246         put_reg (RTL8019_REMOTESTARTADDRESS0, 0);
 247         put_reg (RTL8019_REMOTESTARTADDRESS1, RTL8019_TPSTART);
 248         put_reg (RTL8019_REMOTEBYTECOUNT0, (pn & 0xff));
 249         put_reg (RTL8019_REMOTEBYTECOUNT1, ((pn >> 8) & 0xff));
 250
 251         put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMAWR);
 252         while (pn > 0) {
 253                 put_reg (RTL8019_DMA_DATA, *p++);
 254                 pn--;
 255         }
 256
 257         pn = length;
 258
 259         while (pn < 60) {       /*Padding */
 260                 put_reg (RTL8019_DMA_DATA, 0);
 261                 pn++;
 262         }
 263
 264         while (!(get_reg (RTL8019_INTERRUPTSTATUS)) & 0x40);
 265
 266         put_reg (RTL8019_INTERRUPTSTATUS, 0x40);
 267         put_reg (RTL8019_TRANSMITPAGE, RTL8019_TPSTART);
 268         put_reg (RTL8019_TRANSMITBYTECOUNT0, (pn & 0xff));
 269         put_reg (RTL8019_TRANSMITBYTECOUNT1, ((pn >> 8 & 0xff)));
 270         put_reg (RTL8019_COMMAND, RTL8019_TRANSMIT);
 271
 272         return 0;
 273 }
 274
 275 #endif /* CONFIG_CMD_NET */
 276
 277 #endif /* CONFIG_DRIVER_RTL8019 */