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Diffstat (limited to 'cpu/mips/au1x00_eth.c')
-rw-r--r--cpu/mips/au1x00_eth.c216
1 files changed, 216 insertions, 0 deletions
diff --git a/cpu/mips/au1x00_eth.c b/cpu/mips/au1x00_eth.c
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--- /dev/null
+++ b/cpu/mips/au1x00_eth.c
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+/* Only eth0 supported for now
+ *
+ * (C) Copyright 2003
+ * Thomas.Lange@corelatus.se
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <config.h>
+
+#ifdef CONFIG_AU1X00
+
+#if defined(CFG_DISCOVER_PHY) || (CONFIG_COMMANDS & CFG_CMD_MII)
+#error "PHY and MII not supported yet"
+/* We just assume that we are running 100FD for now */
+/* We all use switches, right? ;-) */
+#endif
+
+#ifdef CONFIG_AU1000
+/* Base address differ between cpu:s */
+#define ETH0_BASE AU1000_ETH0_BASE
+#define MAC0_ENABLE AU1000_MAC0_ENABLE
+#else
+#error "Au1100 and Au1500 not supported"
+#endif
+
+#include <common.h>
+#include <malloc.h>
+#include <net.h>
+#include <command.h>
+#include <asm/io.h>
+#include <asm/au1x00.h>
+
+/* Ethernet Transmit and Receive Buffers */
+#define DBUF_LENGTH 1520
+#define PKT_MAXBUF_SIZE 1518
+
+static char txbuf[DBUF_LENGTH];
+
+static int next_tx;
+static int next_rx;
+
+/* 4 rx and 4 tx fifos */
+#define NO_OF_FIFOS 4
+
+typedef struct{
+ u32 status;
+ u32 addr;
+ u32 len; /* Only used for tx */
+ u32 not_used;
+} mac_fifo_t;
+
+mac_fifo_t mac_fifo[NO_OF_FIFOS];
+
+#define MAX_WAIT 1000
+
+static int au1x00_send(struct eth_device* dev, volatile void *packet, int length){
+ volatile mac_fifo_t *fifo_tx =
+ (volatile mac_fifo_t*)(MAC0_TX_DMA_ADDR+MAC_TX_BUFF0_STATUS);
+ int i;
+ int res;
+
+ /* tx fifo should always be idle */
+ fifo_tx[next_tx].len = length;
+ fifo_tx[next_tx].addr = (virt_to_phys(packet))|TX_DMA_ENABLE;
+ au_sync();
+
+ udelay(1);
+ i=0;
+ while(!(fifo_tx[next_tx].addr&TX_T_DONE)){
+ if(i>MAX_WAIT){
+ printf("TX timeout\n");
+ break;
+ }
+ udelay(1);
+ i++;
+ }
+
+ /* Clear done bit */
+ fifo_tx[next_tx].addr = 0;
+ fifo_tx[next_tx].len = 0;
+ au_sync();
+
+ res = fifo_tx[next_tx].status;
+
+ next_tx++;
+ if(next_tx>=NO_OF_FIFOS){
+ next_tx=0;
+ }
+ return(res);
+}
+
+static int au1x00_recv(struct eth_device* dev){
+ volatile mac_fifo_t *fifo_rx =
+ (volatile mac_fifo_t*)(MAC0_RX_DMA_ADDR+MAC_RX_BUFF0_STATUS);
+
+ int length;
+ u32 status;
+
+ for(;;){
+ if(!(fifo_rx[next_rx].addr&RX_T_DONE)){
+ /* Nothing has been received */
+ return(-1);
+ }
+
+ status = fifo_rx[next_rx].status;
+
+ length = status&0x3FFF;
+
+ if(status&RX_ERROR){
+ printf("Rx error 0x%x\n", status);
+ }
+ else{
+ /* Pass the packet up to the protocol layers. */
+ NetReceive(NetRxPackets[next_rx], length - 4);
+ }
+
+ fifo_rx[next_rx].addr = (virt_to_phys(NetRxPackets[next_rx]))|RX_DMA_ENABLE;
+
+ next_rx++;
+ if(next_rx>=NO_OF_FIFOS){
+ next_rx=0;
+ }
+ } /* for */
+
+ return(0); /* Does anyone use this? */
+}
+
+static int au1x00_init(struct eth_device* dev, bd_t * bd){
+
+ volatile u32 *macen = (volatile u32*)MAC0_ENABLE;
+ volatile u32 *mac_ctrl = (volatile u32*)(ETH0_BASE+MAC_CONTROL);
+ volatile u32 *mac_addr_high = (volatile u32*)(ETH0_BASE+MAC_ADDRESS_HIGH);
+ volatile u32 *mac_addr_low = (volatile u32*)(ETH0_BASE+MAC_ADDRESS_LOW);
+ volatile u32 *mac_mcast_high = (volatile u32*)(ETH0_BASE+MAC_MCAST_HIGH);
+ volatile u32 *mac_mcast_low = (volatile u32*)(ETH0_BASE+MAC_MCAST_LOW);
+ volatile mac_fifo_t *fifo_tx =
+ (volatile mac_fifo_t*)(MAC0_TX_DMA_ADDR+MAC_TX_BUFF0_STATUS);
+ volatile mac_fifo_t *fifo_rx =
+ (volatile mac_fifo_t*)(MAC0_RX_DMA_ADDR+MAC_RX_BUFF0_STATUS);
+ int i;
+
+ next_tx = 0;
+ next_rx = 0;
+
+ /* We have to enable clocks before releasing reset */
+ *macen = MAC_EN_CLOCK_ENABLE;
+ udelay(10);
+
+ /* Enable MAC0 */
+ /* We have to release reset before accessing registers */
+ *macen = MAC_EN_CLOCK_ENABLE|MAC_EN_RESET0|
+ MAC_EN_RESET1|MAC_EN_RESET2;
+ udelay(10);
+
+ for(i=0;i<NO_OF_FIFOS;i++){
+ fifo_tx[i].len = 0;
+ fifo_tx[i].addr = virt_to_phys(&txbuf[0]);
+ fifo_rx[i].addr = (virt_to_phys(NetRxPackets[i]))|RX_DMA_ENABLE;
+ }
+
+ /* Put mac addr in little endian */
+#define ea eth_get_dev()->enetaddr
+ *mac_addr_high = (ea[5] << 8) | (ea[4] ) ;
+ *mac_addr_low = (ea[3] << 24) | (ea[2] << 16) |
+ (ea[1] << 8) | (ea[0] ) ;
+#undef ea
+
+ *mac_mcast_low = 0;
+ *mac_mcast_high = 0;
+
+ *mac_ctrl = MAC_BIG_ENDIAN|MAC_FULL_DUPLEX;
+ udelay(1);
+ *mac_ctrl = MAC_BIG_ENDIAN|MAC_FULL_DUPLEX|MAC_RX_ENABLE|MAC_TX_ENABLE;
+
+ return(1);
+}
+
+static void au1x00_halt(struct eth_device* dev){
+}
+
+int au1x00_enet_initialize(bd_t *bis){
+ struct eth_device* dev;
+
+ dev = (struct eth_device*) malloc(sizeof *dev);
+ memset(dev, 0, sizeof *dev);
+
+ sprintf(dev->name, "Au1X00 ETHERNET");
+ dev->iobase = 0;
+ dev->priv = 0;
+ dev->init = au1x00_init;
+ dev->halt = au1x00_halt;
+ dev->send = au1x00_send;
+ dev->recv = au1x00_recv;
+
+ eth_register(dev);
+
+ return 1;
+}
+
+#endif /* CONFIG_AU1X00 */