2 * Realtek 8019AS Ethernet
3 * (C) Copyright 2002-2003
4 * Xue Ligong(lgxue@hotmail.com),Wang Kehao, ESLAB, whut.edu.cn
6 * See file CREDITS for list of people who contributed to this
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.
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.
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,
26 * This code works in 8bit mode.
27 * If you need to work in 16bit mode, PLS change it!
35 /* packet page register access functions */
37 static unsigned char get_reg (unsigned int regno)
39 return (*(unsigned char *) regno);
42 static void put_reg (unsigned int regno, unsigned char val)
44 *(volatile unsigned char *) regno = val;
47 static void eth_reset (void)
52 ucTemp = get_reg (RTL8019_RESET);
53 put_reg (RTL8019_RESET, ucTemp);
54 put_reg (RTL8019_INTERRUPTSTATUS, 0xff);
55 udelay (2000); /* wait for 2ms */
58 void rtl8019_get_enetaddr (uchar * addr)
65 put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
66 put_reg (RTL8019_DATACONFIGURATION, 0x48);
67 put_reg (RTL8019_REMOTESTARTADDRESS0, 0x00);
68 put_reg (RTL8019_REMOTESTARTADDRESS1, 0x00);
69 put_reg (RTL8019_REMOTEBYTECOUNT0, 12);
70 put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
71 put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
73 for (i = 0; i < 6; i++) {
74 temp = get_reg (RTL8019_DMA_DATA);
76 temp = get_reg (RTL8019_DMA_DATA);
80 while ((!get_reg (RTL8019_INTERRUPTSTATUS) & 0x40));
82 put_reg (RTL8019_REMOTEBYTECOUNT0, 0x00);
83 put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
84 put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
89 put_reg (RTL8019_COMMAND, 0x01);
92 int eth_init (bd_t * bd)
96 put_reg (RTL8019_COMMAND, RTL8019_PAGE0STOP);
97 put_reg (RTL8019_DATACONFIGURATION, 0x48);
98 put_reg (RTL8019_REMOTEBYTECOUNT0, 0x00);
99 put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
100 put_reg (RTL8019_RECEIVECONFIGURATION, 0x00); /*00; */
101 put_reg (RTL8019_TRANSMITPAGE, RTL8019_TPSTART);
102 put_reg (RTL8019_TRANSMITCONFIGURATION, 0x02);
103 put_reg (RTL8019_PAGESTART, RTL8019_PSTART);
104 put_reg (RTL8019_BOUNDARY, RTL8019_PSTART);
105 put_reg (RTL8019_PAGESTOP, RTL8019_PSTOP);
106 put_reg (RTL8019_INTERRUPTSTATUS, 0xff);
107 put_reg (RTL8019_INTERRUPTMASK, 0x11); /*b; */
108 put_reg (RTL8019_COMMAND, RTL8019_PAGE1STOP);
109 eth_getenv_enetaddr("ethaddr", enetaddr);
110 put_reg (RTL8019_PHYSICALADDRESS0, enetaddr[0]);
111 put_reg (RTL8019_PHYSICALADDRESS1, enetaddr[1]);
112 put_reg (RTL8019_PHYSICALADDRESS2, enetaddr[2]);
113 put_reg (RTL8019_PHYSICALADDRESS3, enetaddr[3]);
114 put_reg (RTL8019_PHYSICALADDRESS4, enetaddr[4]);
115 put_reg (RTL8019_PHYSICALADDRESS5, enetaddr[5]);
116 put_reg (RTL8019_MULTIADDRESS0, 0x00);
117 put_reg (RTL8019_MULTIADDRESS1, 0x00);
118 put_reg (RTL8019_MULTIADDRESS2, 0x00);
119 put_reg (RTL8019_MULTIADDRESS3, 0x00);
120 put_reg (RTL8019_MULTIADDRESS4, 0x00);
121 put_reg (RTL8019_MULTIADDRESS5, 0x00);
122 put_reg (RTL8019_MULTIADDRESS6, 0x00);
123 put_reg (RTL8019_MULTIADDRESS7, 0x00);
124 put_reg (RTL8019_CURRENT, RTL8019_PSTART);
125 put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
126 put_reg (RTL8019_TRANSMITCONFIGURATION, 0xe0); /*58; */
131 static unsigned char nic_to_pc (void)
133 unsigned char rec_head_status;
134 unsigned char next_packet_pointer;
135 unsigned char packet_length0;
136 unsigned char packet_length1;
137 unsigned short rxlen = 0;
139 unsigned char current_point;
143 * The RTL8019's first 4B is packet status,page of next packet
144 * and packet length(2B).So we receive the fist 4B.
146 put_reg (RTL8019_REMOTESTARTADDRESS1, get_reg (RTL8019_BOUNDARY));
147 put_reg (RTL8019_REMOTESTARTADDRESS0, 0x00);
148 put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00);
149 put_reg (RTL8019_REMOTEBYTECOUNT0, 0x04);
151 put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
153 rec_head_status = get_reg (RTL8019_DMA_DATA);
154 next_packet_pointer = get_reg (RTL8019_DMA_DATA);
155 packet_length0 = get_reg (RTL8019_DMA_DATA);
156 packet_length1 = get_reg (RTL8019_DMA_DATA);
158 put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
159 /*Packet length is in two 8bit registers */
160 rxlen = packet_length1;
161 rxlen = (((rxlen << 8) & 0xff00) + packet_length0);
164 if (rxlen > PKTSIZE_ALIGN + PKTALIGN)
165 printf ("packet too big!\n");
167 /*Receive the packet */
168 put_reg (RTL8019_REMOTESTARTADDRESS0, 0x04);
169 put_reg (RTL8019_REMOTESTARTADDRESS1, get_reg (RTL8019_BOUNDARY));
171 put_reg (RTL8019_REMOTEBYTECOUNT0, (rxlen & 0xff));
172 put_reg (RTL8019_REMOTEBYTECOUNT1, ((rxlen >> 8) & 0xff));
175 put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD);
177 for (addr = (unsigned char *) NetRxPackets[0], i = rxlen; i > 0; i--)
178 *addr++ = get_reg (RTL8019_DMA_DATA);
179 /* Pass the packet up to the protocol layers. */
180 NetReceive (NetRxPackets[0], rxlen);
182 while (!(get_reg (RTL8019_INTERRUPTSTATUS)) & 0x40); /* wait for the op. */
185 * To test whether the packets are all received,get the
186 * location of current point
188 put_reg (RTL8019_COMMAND, RTL8019_PAGE1);
189 current_point = get_reg (RTL8019_CURRENT);
190 put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
191 put_reg (RTL8019_BOUNDARY, next_packet_pointer);
192 return current_point;
195 /* Get a data block via Ethernet */
196 extern int eth_rx (void)
198 unsigned char temp, current_point;
200 put_reg (RTL8019_COMMAND, RTL8019_PAGE0);
203 temp = get_reg (RTL8019_INTERRUPTSTATUS);
207 put_reg (RTL8019_COMMAND, RTL8019_PAGE0STOP);
209 put_reg (RTL8019_REMOTEBYTECOUNT0, 0);
210 put_reg (RTL8019_REMOTEBYTECOUNT1, 0);
211 put_reg (RTL8019_TRANSMITCONFIGURATION, 2);
213 current_point = nic_to_pc ();
214 } while (get_reg (RTL8019_BOUNDARY) != current_point);
216 put_reg (RTL8019_TRANSMITCONFIGURATION, 0xe0);
222 put_reg (RTL8019_INTERRUPTSTATUS, 0x01);
223 current_point = nic_to_pc ();
224 } while (get_reg (RTL8019_BOUNDARY) != current_point);
233 /* Send a data block via Ethernet. */
234 extern int eth_send (volatile void *packet, int length)
236 volatile unsigned char *p;
240 p = (volatile unsigned char *) packet;
242 while (get_reg (RTL8019_COMMAND) == RTL8019_TRANSMIT);
244 put_reg (RTL8019_REMOTESTARTADDRESS0, 0);
245 put_reg (RTL8019_REMOTESTARTADDRESS1, RTL8019_TPSTART);
246 put_reg (RTL8019_REMOTEBYTECOUNT0, (pn & 0xff));
247 put_reg (RTL8019_REMOTEBYTECOUNT1, ((pn >> 8) & 0xff));
249 put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMAWR);
251 put_reg (RTL8019_DMA_DATA, *p++);
257 while (pn < 60) { /*Padding */
258 put_reg (RTL8019_DMA_DATA, 0);
262 while (!(get_reg (RTL8019_INTERRUPTSTATUS)) & 0x40);
264 put_reg (RTL8019_INTERRUPTSTATUS, 0x40);
265 put_reg (RTL8019_TRANSMITPAGE, RTL8019_TPSTART);
266 put_reg (RTL8019_TRANSMITBYTECOUNT0, (pn & 0xff));
267 put_reg (RTL8019_TRANSMITBYTECOUNT1, ((pn >> 8 & 0xff)));
268 put_reg (RTL8019_COMMAND, RTL8019_TRANSMIT);