diff options
Diffstat (limited to 'drivers/rtl8019.c')
| -rw-r--r-- | drivers/rtl8019.c | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/drivers/rtl8019.c b/drivers/rtl8019.c new file mode 100644 index 0000000..62b9245 --- /dev/null +++ b/drivers/rtl8019.c @@ -0,0 +1,282 @@ +/* + * Realtek 8019AS Ethernet + * (C) Copyright 2002-2003 + * Xue Ligong(lgxue@hotmail.com),Wang Kehao, ESLAB, whut.edu.cn + * + * 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 + */ + +/* + * This code works in 8bit mode. + * If you need to work in 16bit mode, PLS change it! + */ + +#include <common.h> +#include <command.h> +#include "rtl8019.h" +#include <net.h> + +#ifdef CONFIG_DRIVER_RTL8019 + +#if (CONFIG_COMMANDS & CFG_CMD_NET) + + +/* packet page register access functions */ + + +static unsigned char get_reg (unsigned int regno) +{ + return (*(unsigned char *) regno); +} + + +static void put_reg (unsigned int regno, unsigned char val) +{ + *(volatile unsigned char *) regno = val; +} + +static void eth_reset (void) +{ + unsigned char ucTemp; + + /* reset NIC */ + ucTemp = get_reg (RTL8019_RESET); + put_reg (RTL8019_RESET, ucTemp); + put_reg (RTL8019_INTERRUPTSTATUS, 0xff); + udelay (2000); /* wait for 2ms */ +} + +void rtl8019_get_enetaddr (uchar * addr) +{ + unsigned char i; + unsigned char temp; + + eth_reset (); + + put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD); + put_reg (RTL8019_DATACONFIGURATION, 0x48); + put_reg (RTL8019_REMOTESTARTADDRESS0, 0x00); + put_reg (RTL8019_REMOTESTARTADDRESS1, 0x00); + put_reg (RTL8019_REMOTEBYTECOUNT0, 12); + put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00); + put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD); + printf ("MAC: "); + for (i = 0; i < 6; i++) { + temp = get_reg (RTL8019_DMA_DATA); + *addr++ = temp; + temp = get_reg (RTL8019_DMA_DATA); + printf ("%x:", temp); + } + + while ((!get_reg (RTL8019_INTERRUPTSTATUS) & 0x40)); + printf ("\b \n"); + put_reg (RTL8019_REMOTEBYTECOUNT0, 0x00); + put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00); + put_reg (RTL8019_COMMAND, RTL8019_PAGE0); +} + + +void eth_halt (void) +{ + put_reg (RTL8019_COMMAND, 0x01); +} + +int eth_init (bd_t * bd) +{ + eth_reset (); + put_reg (RTL8019_COMMAND, RTL8019_PAGE0STOP); + put_reg (RTL8019_DATACONFIGURATION, 0x48); + put_reg (RTL8019_REMOTEBYTECOUNT0, 0x00); + put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00); + put_reg (RTL8019_RECEIVECONFIGURATION, 0x00); /*00; */ + put_reg (RTL8019_TRANSMITPAGE, RTL8019_TPSTART); + put_reg (RTL8019_TRANSMITCONFIGURATION, 0x02); + put_reg (RTL8019_PAGESTART, RTL8019_PSTART); + put_reg (RTL8019_BOUNDARY, RTL8019_PSTART); + put_reg (RTL8019_PAGESTOP, RTL8019_PSTOP); + put_reg (RTL8019_INTERRUPTSTATUS, 0xff); + put_reg (RTL8019_INTERRUPTMASK, 0x11); /*b; */ + put_reg (RTL8019_COMMAND, RTL8019_PAGE1STOP); + put_reg (RTL8019_PHYSICALADDRESS0, bd->bi_enetaddr[0]); + put_reg (RTL8019_PHYSICALADDRESS1, bd->bi_enetaddr[1]); + put_reg (RTL8019_PHYSICALADDRESS2, bd->bi_enetaddr[2]); + put_reg (RTL8019_PHYSICALADDRESS3, bd->bi_enetaddr[3]); + put_reg (RTL8019_PHYSICALADDRESS4, bd->bi_enetaddr[4]); + put_reg (RTL8019_PHYSICALADDRESS5, bd->bi_enetaddr[5]); + put_reg (RTL8019_MULTIADDRESS0, 0x00); + put_reg (RTL8019_MULTIADDRESS1, 0x00); + put_reg (RTL8019_MULTIADDRESS2, 0x00); + put_reg (RTL8019_MULTIADDRESS3, 0x00); + put_reg (RTL8019_MULTIADDRESS4, 0x00); + put_reg (RTL8019_MULTIADDRESS5, 0x00); + put_reg (RTL8019_MULTIADDRESS6, 0x00); + put_reg (RTL8019_MULTIADDRESS7, 0x00); + put_reg (RTL8019_CURRENT, RTL8019_PSTART); + put_reg (RTL8019_COMMAND, RTL8019_PAGE0); + put_reg (RTL8019_TRANSMITCONFIGURATION, 0xe0); /*58; */ + + return 0; +} + + +static unsigned char nic_to_pc (void) +{ + unsigned char rec_head_status; + unsigned char next_packet_pointer; + unsigned char packet_length0; + unsigned char packet_length1; + unsigned short rxlen = 0; + unsigned int i = 4; + unsigned char current_point; + unsigned char *addr; + + /* + * The RTL8019's first 4B is packet status,page of next packet + * and packet length(2B).So we receive the fist 4B. + */ + put_reg (RTL8019_REMOTESTARTADDRESS1, get_reg (RTL8019_BOUNDARY)); + put_reg (RTL8019_REMOTESTARTADDRESS0, 0x00); + put_reg (RTL8019_REMOTEBYTECOUNT1, 0x00); + put_reg (RTL8019_REMOTEBYTECOUNT0, 0x04); + + put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD); + + rec_head_status = get_reg (RTL8019_DMA_DATA); + next_packet_pointer = get_reg (RTL8019_DMA_DATA); + packet_length0 = get_reg (RTL8019_DMA_DATA); + packet_length1 = get_reg (RTL8019_DMA_DATA); + + put_reg (RTL8019_COMMAND, RTL8019_PAGE0); + /*Packet length is in two 8bit registers */ + rxlen = packet_length1; + rxlen = (((rxlen << 8) & 0xff00) + packet_length0); + rxlen -= 4; + + if (rxlen > PKTSIZE_ALIGN + PKTALIGN) + printf ("packet too big!\n"); + + /*Receive the packet */ + put_reg (RTL8019_REMOTESTARTADDRESS0, 0x04); + put_reg (RTL8019_REMOTESTARTADDRESS1, get_reg (RTL8019_BOUNDARY)); + + put_reg (RTL8019_REMOTEBYTECOUNT0, (rxlen & 0xff)); + put_reg (RTL8019_REMOTEBYTECOUNT1, ((rxlen >> 8) & 0xff)); + + + put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMARD); + + for (addr = (unsigned char *) NetRxPackets[0], i = rxlen; i > 0; i--) + *addr++ = get_reg (RTL8019_DMA_DATA); + /* Pass the packet up to the protocol layers. */ + NetReceive (NetRxPackets[0], rxlen); + + while (!(get_reg (RTL8019_INTERRUPTSTATUS)) & 0x40); /* wait for the op. */ + + /* + * To test whether the packets are all received,get the + * location of current point + */ + put_reg (RTL8019_COMMAND, RTL8019_PAGE1); + current_point = get_reg (RTL8019_CURRENT); + put_reg (RTL8019_COMMAND, RTL8019_PAGE0); + put_reg (RTL8019_BOUNDARY, next_packet_pointer); + return current_point; +} + +/* Get a data block via Ethernet */ +extern int eth_rx (void) +{ + unsigned char temp, current_point; + + put_reg (RTL8019_COMMAND, RTL8019_PAGE0); + + while (1) { + temp = get_reg (RTL8019_INTERRUPTSTATUS); + + if (temp & 0x90) { + /*overflow */ + put_reg (RTL8019_COMMAND, RTL8019_PAGE0STOP); + udelay (2000); + put_reg (RTL8019_REMOTEBYTECOUNT0, 0); + put_reg (RTL8019_REMOTEBYTECOUNT1, 0); + put_reg (RTL8019_TRANSMITCONFIGURATION, 2); + do { + current_point = nic_to_pc (); + } while (get_reg (RTL8019_BOUNDARY) != current_point); + + put_reg (RTL8019_TRANSMITCONFIGURATION, 0xe0); + } + + if (temp & 0x1) { + /*packet received */ + do { + put_reg (RTL8019_INTERRUPTSTATUS, 0x01); + current_point = nic_to_pc (); + } while (get_reg (RTL8019_BOUNDARY) != current_point); + } + + if (!(temp & 0x1)) + return 0; + /* done and exit. */ + } +} + +/* Send a data block via Ethernet. */ +extern int eth_send (volatile void *packet, int length) +{ + volatile unsigned char *p; + unsigned int pn; + + pn = length; + p = (volatile unsigned char *) packet; + + while (get_reg (RTL8019_COMMAND) == RTL8019_TRANSMIT); + + put_reg (RTL8019_REMOTESTARTADDRESS0, 0); + put_reg (RTL8019_REMOTESTARTADDRESS1, RTL8019_TPSTART); + put_reg (RTL8019_REMOTEBYTECOUNT0, (pn & 0xff)); + put_reg (RTL8019_REMOTEBYTECOUNT1, ((pn >> 8) & 0xff)); + + put_reg (RTL8019_COMMAND, RTL8019_REMOTEDMAWR); + while (pn > 0) { + put_reg (RTL8019_DMA_DATA, *p++); + pn--; + } + + pn = length; + + while (pn < 60) { /*Padding */ + put_reg (RTL8019_DMA_DATA, 0); + pn++; + } + + while (!(get_reg (RTL8019_INTERRUPTSTATUS)) & 0x40); + + put_reg (RTL8019_INTERRUPTSTATUS, 0x40); + put_reg (RTL8019_TRANSMITPAGE, RTL8019_TPSTART); + put_reg (RTL8019_TRANSMITBYTECOUNT0, (pn & 0xff)); + put_reg (RTL8019_TRANSMITBYTECOUNT1, ((pn >> 8 & 0xff))); + put_reg (RTL8019_COMMAND, RTL8019_TRANSMIT); + + return 0; +} + +#endif /* COMMANDS & CFG_NET */ + +#endif /* CONFIG_DRIVER_RTL8019 */ |