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)
29 #error "PHY not supported yet"
30 /* We just assume that we are running 100FD for now */
31 /* We all use switches, right? ;-) */
34 /* I assume ethernet behaves like au1000 */
37 /* Base address differ between cpu:s */
38 #define ETH0_BASE AU1000_ETH0_BASE
39 #define MAC0_ENABLE AU1000_MAC0_ENABLE
42 #define ETH0_BASE AU1100_ETH0_BASE
43 #define MAC0_ENABLE AU1100_MAC0_ENABLE
46 #define ETH0_BASE AU1500_ETH0_BASE
47 #define MAC0_ENABLE AU1500_MAC0_ENABLE
50 #define ETH0_BASE AU1550_ETH0_BASE
51 #define MAC0_ENABLE AU1550_MAC0_ENABLE
53 #error "No valid cpu set"
64 #include <asm/au1x00.h>
66 #if (CONFIG_COMMANDS & CFG_CMD_MII)
70 /* Ethernet Transmit and Receive Buffers */
71 #define DBUF_LENGTH 1520
72 #define PKT_MAXBUF_SIZE 1518
74 static char txbuf[DBUF_LENGTH];
79 /* 4 rx and 4 tx fifos */
85 u32 len; /* Only used for tx */
89 mac_fifo_t mac_fifo[NO_OF_FIFOS];
93 static int au1x00_send(struct eth_device* dev, volatile void *packet, int length){
94 volatile mac_fifo_t *fifo_tx =
95 (volatile mac_fifo_t*)(MAC0_TX_DMA_ADDR+MAC_TX_BUFF0_STATUS);
99 /* tx fifo should always be idle */
100 fifo_tx[next_tx].len = length;
101 fifo_tx[next_tx].addr = (virt_to_phys(packet))|TX_DMA_ENABLE;
106 while(!(fifo_tx[next_tx].addr&TX_T_DONE)){
108 printf("TX timeout\n");
116 fifo_tx[next_tx].addr = 0;
117 fifo_tx[next_tx].len = 0;
120 res = fifo_tx[next_tx].status;
123 if(next_tx>=NO_OF_FIFOS){
129 static int au1x00_recv(struct eth_device* dev){
130 volatile mac_fifo_t *fifo_rx =
131 (volatile mac_fifo_t*)(MAC0_RX_DMA_ADDR+MAC_RX_BUFF0_STATUS);
137 if(!(fifo_rx[next_rx].addr&RX_T_DONE)){
138 /* Nothing has been received */
142 status = fifo_rx[next_rx].status;
144 length = status&0x3FFF;
147 printf("Rx error 0x%x\n", status);
150 /* Pass the packet up to the protocol layers. */
151 NetReceive(NetRxPackets[next_rx], length - 4);
154 fifo_rx[next_rx].addr = (virt_to_phys(NetRxPackets[next_rx]))|RX_DMA_ENABLE;
157 if(next_rx>=NO_OF_FIFOS){
162 return(0); /* Does anyone use this? */
165 static int au1x00_init(struct eth_device* dev, bd_t * bd){
167 volatile u32 *macen = (volatile u32*)MAC0_ENABLE;
168 volatile u32 *mac_ctrl = (volatile u32*)(ETH0_BASE+MAC_CONTROL);
169 volatile u32 *mac_addr_high = (volatile u32*)(ETH0_BASE+MAC_ADDRESS_HIGH);
170 volatile u32 *mac_addr_low = (volatile u32*)(ETH0_BASE+MAC_ADDRESS_LOW);
171 volatile u32 *mac_mcast_high = (volatile u32*)(ETH0_BASE+MAC_MCAST_HIGH);
172 volatile u32 *mac_mcast_low = (volatile u32*)(ETH0_BASE+MAC_MCAST_LOW);
173 volatile mac_fifo_t *fifo_tx =
174 (volatile mac_fifo_t*)(MAC0_TX_DMA_ADDR+MAC_TX_BUFF0_STATUS);
175 volatile mac_fifo_t *fifo_rx =
176 (volatile mac_fifo_t*)(MAC0_RX_DMA_ADDR+MAC_RX_BUFF0_STATUS);
179 next_tx = TX_GET_DMA_BUFFER(fifo_tx[0].addr);
180 next_rx = RX_GET_DMA_BUFFER(fifo_rx[0].addr);
182 /* We have to enable clocks before releasing reset */
183 *macen = MAC_EN_CLOCK_ENABLE;
187 /* We have to release reset before accessing registers */
188 *macen = MAC_EN_CLOCK_ENABLE|MAC_EN_RESET0|
189 MAC_EN_RESET1|MAC_EN_RESET2;
192 for(i=0;i<NO_OF_FIFOS;i++){
194 fifo_tx[i].addr = virt_to_phys(&txbuf[0]);
195 fifo_rx[i].addr = (virt_to_phys(NetRxPackets[i]))|RX_DMA_ENABLE;
198 /* Put mac addr in little endian */
199 #define ea eth_get_dev()->enetaddr
200 *mac_addr_high = (ea[5] << 8) | (ea[4] ) ;
201 *mac_addr_low = (ea[3] << 24) | (ea[2] << 16) |
202 (ea[1] << 8) | (ea[0] ) ;
207 /* Make sure the MAC buffer is in the correct endian mode */
208 #ifdef __LITTLE_ENDIAN
209 *mac_ctrl = MAC_FULL_DUPLEX;
211 *mac_ctrl = MAC_FULL_DUPLEX|MAC_RX_ENABLE|MAC_TX_ENABLE;
213 *mac_ctrl = MAC_BIG_ENDIAN|MAC_FULL_DUPLEX;
215 *mac_ctrl = MAC_BIG_ENDIAN|MAC_FULL_DUPLEX|MAC_RX_ENABLE|MAC_TX_ENABLE;
221 static void au1x00_halt(struct eth_device* dev){
224 int au1x00_enet_initialize(bd_t *bis){
225 struct eth_device* dev;
227 if ((dev = (struct eth_device*)malloc(sizeof *dev)) == NULL) {
228 puts ("malloc failed\n");
232 memset(dev, 0, sizeof *dev);
234 sprintf(dev->name, "Au1X00 ethernet");
237 dev->init = au1x00_init;
238 dev->halt = au1x00_halt;
239 dev->send = au1x00_send;
240 dev->recv = au1x00_recv;
244 #if (CONFIG_COMMANDS & CFG_CMD_MII)
245 miiphy_register(dev->name,
246 au1x00_miiphy_read, au1x00_miiphy_write);
252 #if (CONFIG_COMMANDS & CFG_CMD_MII)
253 int au1x00_miiphy_read(char *devname, unsigned char addr,
254 unsigned char reg, unsigned short * value)
256 volatile u32 *mii_control_reg = (volatile u32*)(ETH0_BASE+MAC_MII_CNTRL);
257 volatile u32 *mii_data_reg = (volatile u32*)(ETH0_BASE+MAC_MII_DATA);
259 unsigned int timedout = 20;
261 while (*mii_control_reg & MAC_MII_BUSY) {
263 if (--timedout == 0) {
264 printf("au1x00_eth: miiphy_read busy timeout!!\n");
269 mii_control = MAC_SET_MII_SELECT_REG(reg) |
270 MAC_SET_MII_SELECT_PHY(addr) | MAC_MII_READ;
272 *mii_control_reg = mii_control;
275 while (*mii_control_reg & MAC_MII_BUSY) {
277 if (--timedout == 0) {
278 printf("au1x00_eth: miiphy_read busy timeout!!\n");
282 *value = *mii_data_reg;
286 int au1x00_miiphy_write(char *devname, unsigned char addr,
287 unsigned char reg, unsigned short value)
289 volatile u32 *mii_control_reg = (volatile u32*)(ETH0_BASE+MAC_MII_CNTRL);
290 volatile u32 *mii_data_reg = (volatile u32*)(ETH0_BASE+MAC_MII_DATA);
292 unsigned int timedout = 20;
294 while (*mii_control_reg & MAC_MII_BUSY) {
296 if (--timedout == 0) {
297 printf("au1x00_eth: miiphy_write busy timeout!!\n");
302 mii_control = MAC_SET_MII_SELECT_REG(reg) |
303 MAC_SET_MII_SELECT_PHY(addr) | MAC_MII_WRITE;
305 *mii_data_reg = value;
306 *mii_control_reg = mii_control;
309 #endif /* CONFIG_COMMANDS & CFG_CMD_MII */
311 #endif /* CONFIG_AU1X00 */