1 /* Only eth0 supported for now
4 * Thomas.Lange@corelatus.se
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,
28 #if defined(CFG_DISCOVER_PHY) || (CONFIG_COMMANDS & CFG_CMD_MII)
29 #error "PHY and MII not supported yet"
30 /* We just assume that we are running 100FD for now */
31 /* We all use switches, right? ;-) */
35 /* Base address differ between cpu:s */
36 #define ETH0_BASE AU1000_ETH0_BASE
37 #define MAC0_ENABLE AU1000_MAC0_ENABLE
39 #error "Au1100 and Au1500 not supported"
47 #include <asm/au1x00.h>
49 /* Ethernet Transmit and Receive Buffers */
50 #define DBUF_LENGTH 1520
51 #define PKT_MAXBUF_SIZE 1518
53 static char txbuf[DBUF_LENGTH];
58 /* 4 rx and 4 tx fifos */
64 u32 len; /* Only used for tx */
68 mac_fifo_t mac_fifo[NO_OF_FIFOS];
72 static int au1x00_send(struct eth_device* dev, volatile void *packet, int length){
73 volatile mac_fifo_t *fifo_tx =
74 (volatile mac_fifo_t*)(MAC0_TX_DMA_ADDR+MAC_TX_BUFF0_STATUS);
78 /* tx fifo should always be idle */
79 fifo_tx[next_tx].len = length;
80 fifo_tx[next_tx].addr = (virt_to_phys(packet))|TX_DMA_ENABLE;
85 while(!(fifo_tx[next_tx].addr&TX_T_DONE)){
87 printf("TX timeout\n");
95 fifo_tx[next_tx].addr = 0;
96 fifo_tx[next_tx].len = 0;
99 res = fifo_tx[next_tx].status;
102 if(next_tx>=NO_OF_FIFOS){
108 static int au1x00_recv(struct eth_device* dev){
109 volatile mac_fifo_t *fifo_rx =
110 (volatile mac_fifo_t*)(MAC0_RX_DMA_ADDR+MAC_RX_BUFF0_STATUS);
116 if(!(fifo_rx[next_rx].addr&RX_T_DONE)){
117 /* Nothing has been received */
121 status = fifo_rx[next_rx].status;
123 length = status&0x3FFF;
126 printf("Rx error 0x%x\n", status);
129 /* Pass the packet up to the protocol layers. */
130 NetReceive(NetRxPackets[next_rx], length - 4);
133 fifo_rx[next_rx].addr = (virt_to_phys(NetRxPackets[next_rx]))|RX_DMA_ENABLE;
136 if(next_rx>=NO_OF_FIFOS){
141 return(0); /* Does anyone use this? */
144 static int au1x00_init(struct eth_device* dev, bd_t * bd){
146 volatile u32 *macen = (volatile u32*)MAC0_ENABLE;
147 volatile u32 *mac_ctrl = (volatile u32*)(ETH0_BASE+MAC_CONTROL);
148 volatile u32 *mac_addr_high = (volatile u32*)(ETH0_BASE+MAC_ADDRESS_HIGH);
149 volatile u32 *mac_addr_low = (volatile u32*)(ETH0_BASE+MAC_ADDRESS_LOW);
150 volatile u32 *mac_mcast_high = (volatile u32*)(ETH0_BASE+MAC_MCAST_HIGH);
151 volatile u32 *mac_mcast_low = (volatile u32*)(ETH0_BASE+MAC_MCAST_LOW);
152 volatile mac_fifo_t *fifo_tx =
153 (volatile mac_fifo_t*)(MAC0_TX_DMA_ADDR+MAC_TX_BUFF0_STATUS);
154 volatile mac_fifo_t *fifo_rx =
155 (volatile mac_fifo_t*)(MAC0_RX_DMA_ADDR+MAC_RX_BUFF0_STATUS);
161 /* We have to enable clocks before releasing reset */
162 *macen = MAC_EN_CLOCK_ENABLE;
166 /* We have to release reset before accessing registers */
167 *macen = MAC_EN_CLOCK_ENABLE|MAC_EN_RESET0|
168 MAC_EN_RESET1|MAC_EN_RESET2;
171 for(i=0;i<NO_OF_FIFOS;i++){
173 fifo_tx[i].addr = virt_to_phys(&txbuf[0]);
174 fifo_rx[i].addr = (virt_to_phys(NetRxPackets[i]))|RX_DMA_ENABLE;
177 /* Put mac addr in little endian */
178 #define ea eth_get_dev()->enetaddr
179 *mac_addr_high = (ea[5] << 8) | (ea[4] ) ;
180 *mac_addr_low = (ea[3] << 24) | (ea[2] << 16) |
181 (ea[1] << 8) | (ea[0] ) ;
187 *mac_ctrl = MAC_BIG_ENDIAN|MAC_FULL_DUPLEX;
189 *mac_ctrl = MAC_BIG_ENDIAN|MAC_FULL_DUPLEX|MAC_RX_ENABLE|MAC_TX_ENABLE;
194 static void au1x00_halt(struct eth_device* dev){
197 int au1x00_enet_initialize(bd_t *bis){
198 struct eth_device* dev;
200 dev = (struct eth_device*) malloc(sizeof *dev);
201 memset(dev, 0, sizeof *dev);
203 sprintf(dev->name, "Au1X00 ETHERNET");
206 dev->init = au1x00_init;
207 dev->halt = au1x00_halt;
208 dev->send = au1x00_send;
209 dev->recv = au1x00_recv;
216 #endif /* CONFIG_AU1X00 */