| /* 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 |
| |
| /* I assume ethernet behaves like au1000 */ |
| |
| #ifdef CONFIG_AU1000 |
| /* Base address differ between cpu:s */ |
| #define ETH0_BASE AU1000_ETH0_BASE |
| #define MAC0_ENABLE AU1000_MAC0_ENABLE |
| #else |
| #ifdef CONFIG_AU1100 |
| #define ETH0_BASE AU1100_ETH0_BASE |
| #define MAC0_ENABLE AU1100_MAC0_ENABLE |
| #else |
| #ifdef CONFIG_AU1500 |
| #define ETH0_BASE AU1500_ETH0_BASE |
| #define MAC0_ENABLE AU1500_MAC0_ENABLE |
| #else |
| #ifdef CONFIG_AU1550 |
| #define ETH0_BASE AU1550_ETH0_BASE |
| #define MAC0_ENABLE AU1550_MAC0_ENABLE |
| #else |
| #error "No valid cpu set" |
| #endif |
| #endif |
| #endif |
| #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 = TX_GET_DMA_BUFFER(fifo_tx[0].addr); |
| next_rx = RX_GET_DMA_BUFFER(fifo_rx[0].addr); |
| |
| /* 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; |
| |
| /* Make sure the MAC buffer is in the correct endian mode */ |
| #ifdef __LITTLE_ENDIAN |
| *mac_ctrl = MAC_FULL_DUPLEX; |
| udelay(1); |
| *mac_ctrl = MAC_FULL_DUPLEX|MAC_RX_ENABLE|MAC_TX_ENABLE; |
| #else |
| *mac_ctrl = MAC_BIG_ENDIAN|MAC_FULL_DUPLEX; |
| udelay(1); |
| *mac_ctrl = MAC_BIG_ENDIAN|MAC_FULL_DUPLEX|MAC_RX_ENABLE|MAC_TX_ENABLE; |
| #endif |
| |
| 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 */ |