razzor/uboot-1.1.4-kirkwood
1
0
Fork 0
Code
18aafd50f8
uboot-1.1.4-kirkwood/drivers/cs8900.c

323 lines
8.0 KiB
C
Raw Normal View History

u-boot 1.1.4
2024-01-07 23:57:24 +01:00
/*
* Cirrus Logic CS8900A Ethernet
*
* (C) 2003 Wolfgang Denk, wd@denx.de
* Extension to synchronize ethaddr environment variable
* against value in EEPROM
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* Copyright (C) 1999 Ben Williamson <benw@pobox.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is loaded into SRAM in bootstrap mode, where it waits
* for commands on UART1 to read and write memory, jump to code etc.
* A design goal for this program is to be entirely independent of the
* target board. Anything with a CL-PS7111 or EP7211 should be able to run
* this code in bootstrap mode. All the board specifics can be handled on
* the host.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <common.h>
#include <command.h>
#include "cs8900.h"
#include <net.h>
#ifdef CONFIG_DRIVER_CS8900
#if (CONFIG_COMMANDS & CFG_CMD_NET)
#undef DEBUG
/* packet page register access functions */
#ifdef CS8900_BUS32
/* we don't need 16 bit initialisation on 32 bit bus */
#define get_reg_init_bus(x) get_reg((x))
#else
static unsigned short get_reg_init_bus (int regno)
{
/* force 16 bit busmode */
volatile unsigned char c;
c = CS8900_BUS16_0;
c = CS8900_BUS16_1;
c = CS8900_BUS16_0;
c = CS8900_BUS16_1;
c = CS8900_BUS16_0;
CS8900_PPTR = regno;
return (unsigned short) CS8900_PDATA;
}
#endif
static unsigned short get_reg (int regno)
{
CS8900_PPTR = regno;
return (unsigned short) CS8900_PDATA;
}
static void put_reg (int regno, unsigned short val)
{
CS8900_PPTR = regno;
CS8900_PDATA = val;
}
static void eth_reset (void)
{
int tmo;
unsigned short us;
/* reset NIC */
put_reg (PP_SelfCTL, get_reg (PP_SelfCTL) | PP_SelfCTL_Reset);
/* wait for 200ms */
udelay (200000);
/* Wait until the chip is reset */
tmo = get_timer (0) + 1 * CFG_HZ;
while ((((us = get_reg_init_bus (PP_SelfSTAT)) & PP_SelfSTAT_InitD) == 0)
&& tmo < get_timer (0))
/*NOP*/;
}
static void eth_reginit (void)
{
/* receive only error free packets addressed to this card */
put_reg (PP_RxCTL, PP_RxCTL_IA | PP_RxCTL_Broadcast | PP_RxCTL_RxOK);
/* do not generate any interrupts on receive operations */
put_reg (PP_RxCFG, 0);
/* do not generate any interrupts on transmit operations */
put_reg (PP_TxCFG, 0);
/* do not generate any interrupts on buffer operations */
put_reg (PP_BufCFG, 0);
/* enable transmitter/receiver mode */
put_reg (PP_LineCTL, PP_LineCTL_Rx | PP_LineCTL_Tx);
}
void cs8900_get_enetaddr (uchar * addr)
{
int i;
unsigned char env_enetaddr[6];
char *tmp = getenv ("ethaddr");
char *end;
for (i=0; i<6; i++) {
env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
if (tmp)
tmp = (*end) ? end+1 : end;
}
/* verify chip id */
if (get_reg_init_bus (PP_ChipID) != 0x630e)
return;
eth_reset ();
if ((get_reg (PP_SelfST) & (PP_SelfSTAT_EEPROM | PP_SelfSTAT_EEPROM_OK)) ==
(PP_SelfSTAT_EEPROM | PP_SelfSTAT_EEPROM_OK)) {
/* Load the MAC from EEPROM */
for (i = 0; i < 6 / 2; i++) {
unsigned int Addr;
Addr = get_reg (PP_IA + i * 2);
addr[i * 2] = Addr & 0xFF;
addr[i * 2 + 1] = Addr >> 8;
}
if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6) != 0 &&
memcmp(env_enetaddr, addr, 6) != 0) {
printf ("\nWarning: MAC addresses don't match:\n");
printf ("\tHW MAC address: "
"%02X:%02X:%02X:%02X:%02X:%02X\n",
addr[0], addr[1],
addr[2], addr[3],
addr[4], addr[5] );
printf ("\t\"ethaddr\" value: "
"%02X:%02X:%02X:%02X:%02X:%02X\n",
env_enetaddr[0], env_enetaddr[1],
env_enetaddr[2], env_enetaddr[3],
env_enetaddr[4], env_enetaddr[5]) ;
debug ("### Set MAC addr from environment\n");
memcpy (addr, env_enetaddr, 6);
}
if (!tmp) {
char ethaddr[20];
sprintf (ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X",
addr[0], addr[1],
addr[2], addr[3],
addr[4], addr[5]) ;
debug ("### Set environment from HW MAC addr = \"%s\"\n", ethaddr);
setenv ("ethaddr", ethaddr);
}
}
}
void eth_halt (void)
{
/* disable transmitter/receiver mode */
put_reg (PP_LineCTL, 0);
/* "shutdown" to show ChipID or kernel wouldn't find he cs8900 ... */
get_reg_init_bus (PP_ChipID);
}
int eth_init (bd_t * bd)
{
/* verify chip id */
if (get_reg_init_bus (PP_ChipID) != 0x630e) {
printf ("CS8900 Ethernet chip not found?!\n");
return 0;
}
eth_reset ();
/* set the ethernet address */
put_reg (PP_IA + 0, bd->bi_enetaddr[0] | (bd->bi_enetaddr[1] << 8));
put_reg (PP_IA + 2, bd->bi_enetaddr[2] | (bd->bi_enetaddr[3] << 8));
put_reg (PP_IA + 4, bd->bi_enetaddr[4] | (bd->bi_enetaddr[5] << 8));
eth_reginit ();
return 0;
}
/* Get a data block via Ethernet */
extern int eth_rx (void)
{
int i;
unsigned short rxlen;
unsigned short *addr;
unsigned short status;
status = get_reg (PP_RER);
if ((status & PP_RER_RxOK) == 0)
return 0;
status = CS8900_RTDATA; /* stat */
rxlen = CS8900_RTDATA; /* len */
#ifdef DEBUG
if (rxlen > PKTSIZE_ALIGN + PKTALIGN)
printf ("packet too big!\n");
#endif
for (addr = (unsigned short *) NetRxPackets[0], i = rxlen >> 1; i > 0;
i--)
*addr++ = CS8900_RTDATA;
if (rxlen & 1)
*addr++ = CS8900_RTDATA;
/* Pass the packet up to the protocol layers. */
NetReceive (NetRxPackets[0], rxlen);
return rxlen;
}
/* Send a data block via Ethernet. */
extern int eth_send (volatile void *packet, int length)
{
volatile unsigned short *addr;
int tmo;
unsigned short s;
retry:
/* initiate a transmit sequence */
CS8900_TxCMD = PP_TxCmd_TxStart_Full;
CS8900_TxLEN = length;
/* Test to see if the chip has allocated memory for the packet */
if ((get_reg (PP_BusSTAT) & PP_BusSTAT_TxRDY) == 0) {
/* Oops... this should not happen! */
#ifdef DEBUG
printf ("cs: unable to send packet; retrying...\n");
#endif
for (tmo = get_timer (0) + 5 * CFG_HZ; get_timer (0) < tmo;)
/*NOP*/;
eth_reset ();
eth_reginit ();
goto retry;
}
/* Write the contents of the packet */
/* assume even number of bytes */
for (addr = packet; length > 0; length -= 2)
CS8900_RTDATA = *addr++;
/* wait for transfer to succeed */
tmo = get_timer (0) + 5 * CFG_HZ;
while ((s = get_reg (PP_TER) & ~0x1F) == 0) {
if (get_timer (0) >= tmo)
break;
}
/* nothing */ ;
if ((s & (PP_TER_CRS | PP_TER_TxOK)) != PP_TER_TxOK) {
#ifdef DEBUG
printf ("\ntransmission error %#x\n", s);
#endif
}
return 0;
}
static void cs8900_e2prom_ready(void)
{
while(get_reg(PP_SelfST) & SI_BUSY);
}
/***********************************************************/
/* read a 16-bit word out of the EEPROM */
/***********************************************************/
int cs8900_e2prom_read(unsigned char addr, unsigned short *value)
{
cs8900_e2prom_ready();
put_reg(PP_EECMD, EEPROM_READ_CMD | addr);
cs8900_e2prom_ready();
*value = get_reg(PP_EEData);
return 0;
}
/***********************************************************/
/* write a 16-bit word into the EEPROM */
/***********************************************************/
int cs8900_e2prom_write(unsigned char addr, unsigned short value)
{
cs8900_e2prom_ready();
put_reg(PP_EECMD, EEPROM_WRITE_EN);
cs8900_e2prom_ready();
put_reg(PP_EEData, value);
put_reg(PP_EECMD, EEPROM_WRITE_CMD | addr);
cs8900_e2prom_ready();
put_reg(PP_EECMD, EEPROM_WRITE_DIS);
cs8900_e2prom_ready();
return 0;
}
#endif /* COMMANDS & CFG_NET */
#endif /* CONFIG_DRIVER_CS8900 */
Copy Permalink