518 lines
12 KiB
C
518 lines
12 KiB
C
/*------------------------------------------------------------------------
|
|
. 3c589.c
|
|
. This is a driver for 3Com's 3C589 (Etherlink III) PCMCIA Ethernet device.
|
|
.
|
|
. (C) Copyright 2002
|
|
. Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
. Rolf Offermanns <rof@sysgo.de>
|
|
.
|
|
. 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 <common.h>
|
|
#include <command.h>
|
|
#include <net.h>
|
|
|
|
#include "3c589.h"
|
|
|
|
|
|
/* Use power-down feature of the chip */
|
|
#define POWER_DOWN 0
|
|
|
|
#define NO_AUTOPROBE
|
|
|
|
static const char version[] =
|
|
"Your ad here! :P\n";
|
|
|
|
|
|
#undef EL_DEBUG
|
|
|
|
typedef unsigned char byte;
|
|
typedef unsigned short word;
|
|
typedef unsigned long int dword;
|
|
/*------------------------------------------------------------------------
|
|
.
|
|
. Configuration options, for the experienced user to change.
|
|
.
|
|
-------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
. Wait time for memory to be free. This probably shouldn't be
|
|
. tuned that much, as waiting for this means nothing else happens
|
|
. in the system
|
|
*/
|
|
#define MEMORY_WAIT_TIME 16
|
|
|
|
|
|
#if (EL_DEBUG > 2 )
|
|
#define PRINTK3(args...) printf(args)
|
|
#else
|
|
#define PRINTK3(args...)
|
|
#endif
|
|
|
|
#if EL_DEBUG > 1
|
|
#define PRINTK2(args...) printf(args)
|
|
#else
|
|
#define PRINTK2(args...)
|
|
#endif
|
|
|
|
#ifdef EL_DEBUG
|
|
#define PRINTK(args...) printf(args)
|
|
#else
|
|
#define PRINTK(args...)
|
|
#endif
|
|
|
|
#define outb(args...) mmio_outb(args)
|
|
#define mmio_outb(value, addr) (*((volatile byte *)(addr)) = value)
|
|
|
|
#define inb(args...) mmio_inb(args)
|
|
#define mmio_inb(addr) (*((volatile byte *)(addr)))
|
|
|
|
#define outw(args...) mmio_outw(args)
|
|
#define mmio_outw(value, addr) (*((volatile word *)(addr)) = value)
|
|
|
|
#define inw(args...) mmio_inw(args)
|
|
#define mmio_inw(addr) (*((volatile word *)(addr)))
|
|
|
|
#define outsw(args...) mmio_outsw(args)
|
|
#define mmio_outsw(r,b,l) ({ int __i; \
|
|
word *__b2; \
|
|
__b2 = (word *) b; \
|
|
for (__i = 0; __i < l; __i++) { \
|
|
mmio_outw( *(__b2 + __i), r); \
|
|
} \
|
|
})
|
|
|
|
#define insw(args...) mmio_insw(args)
|
|
#define mmio_insw(r,b,l) ({ int __i ; \
|
|
word *__b2; \
|
|
__b2 = (word *) b; \
|
|
for (__i = 0; __i < l; __i++) { \
|
|
*(__b2 + __i) = mmio_inw(r); \
|
|
mmio_inw(0); \
|
|
}; \
|
|
})
|
|
|
|
/*------------------------------------------------------------------------
|
|
.
|
|
. The internal workings of the driver. If you are changing anything
|
|
. here with the 3Com stuff, you should have the datasheet and know
|
|
. what you are doing.
|
|
.
|
|
-------------------------------------------------------------------------*/
|
|
#define EL_BASE_ADDR 0x20000000
|
|
|
|
|
|
/* Offsets from base I/O address. */
|
|
#define EL3_DATA 0x00
|
|
#define EL3_TIMER 0x0a
|
|
#define EL3_CMD 0x0e
|
|
#define EL3_STATUS 0x0e
|
|
|
|
#define EEPROM_READ 0x0080
|
|
|
|
#define EL3WINDOW(win_num) mmio_outw(SelectWindow + (win_num), EL_BASE_ADDR + EL3_CMD)
|
|
|
|
/* The top five bits written to EL3_CMD are a command, the lower
|
|
11 bits are the parameter, if applicable. */
|
|
enum c509cmd {
|
|
TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11,
|
|
RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11,
|
|
TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
|
|
FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
|
|
SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
|
|
SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11,
|
|
StatsDisable = 22<<11, StopCoax = 23<<11,
|
|
};
|
|
|
|
enum c509status {
|
|
IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
|
|
TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
|
|
IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000
|
|
};
|
|
|
|
/* The SetRxFilter command accepts the following classes: */
|
|
enum RxFilter {
|
|
RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
|
|
};
|
|
|
|
/* Register window 1 offsets, the window used in normal operation. */
|
|
#define TX_FIFO 0x00
|
|
#define RX_FIFO 0x00
|
|
#define RX_STATUS 0x08
|
|
#define TX_STATUS 0x0B
|
|
#define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
|
|
|
|
|
|
/*
|
|
Read a word from the EEPROM using the regular EEPROM access register.
|
|
Assume that we are in register window zero.
|
|
*/
|
|
static word read_eeprom(dword ioaddr, int index)
|
|
{
|
|
int i;
|
|
outw(EEPROM_READ + index, ioaddr + 0xa);
|
|
/* Reading the eeprom takes 162 us */
|
|
for (i = 1620; i >= 0; i--)
|
|
if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
|
|
break;
|
|
return inw(ioaddr + 0xc);
|
|
}
|
|
|
|
static void el_get_mac_addr( unsigned char *mac_addr )
|
|
{
|
|
int i;
|
|
union
|
|
{
|
|
word w;
|
|
unsigned char b[2];
|
|
} wrd;
|
|
unsigned char old_window = inw( EL_BASE_ADDR + EL3_STATUS ) >> 13;
|
|
GO_WINDOW(0);
|
|
VX_BUSY_WAIT;
|
|
for (i = 0; i < 3; i++)
|
|
{
|
|
wrd.w = read_eeprom(EL_BASE_ADDR, 0xa+i);
|
|
#ifdef __BIG_ENDIAN
|
|
mac_addr[2*i] = wrd.b[0];
|
|
mac_addr[2*i+1] = wrd.b[1];
|
|
#else
|
|
mac_addr[2*i] = wrd.b[1];
|
|
mac_addr[2*i+1] = wrd.b[0];
|
|
#endif
|
|
}
|
|
GO_WINDOW(old_window);
|
|
VX_BUSY_WAIT;
|
|
}
|
|
|
|
|
|
#if EL_DEBUG > 1
|
|
static void print_packet( byte * buf, int length )
|
|
{
|
|
int i;
|
|
int remainder;
|
|
int lines;
|
|
|
|
PRINTK2("Packet of length %d \n", length );
|
|
|
|
lines = length / 16;
|
|
remainder = length % 16;
|
|
|
|
for ( i = 0; i < lines ; i ++ ) {
|
|
int cur;
|
|
|
|
for ( cur = 0; cur < 8; cur ++ ) {
|
|
byte a, b;
|
|
|
|
a = *(buf ++ );
|
|
b = *(buf ++ );
|
|
PRINTK2("%02x%02x ", a, b );
|
|
}
|
|
PRINTK2("\n");
|
|
}
|
|
for ( i = 0; i < remainder/2 ; i++ ) {
|
|
byte a, b;
|
|
|
|
a = *(buf ++ );
|
|
b = *(buf ++ );
|
|
PRINTK2("%02x%02x ", a, b );
|
|
}
|
|
PRINTK2("\n");
|
|
}
|
|
#endif /* EL_DEBUG > 1 */
|
|
|
|
|
|
/**************************************************************************
|
|
ETH_RESET - Reset adapter
|
|
***************************************************************************/
|
|
static void el_reset(bd_t *bd)
|
|
{
|
|
/***********************************************************
|
|
Reset 3Com 595 card
|
|
*************************************************************/
|
|
/* QUICK HACK
|
|
* - adjust timing for 3c589
|
|
* - enable io for PCMCIA */
|
|
outw(0x0004, 0xa0000018);
|
|
udelay(100);
|
|
outw(0x0041, 0x28010000);
|
|
udelay(100);
|
|
|
|
/* issue global reset */
|
|
outw(GLOBAL_RESET, BASE + VX_COMMAND);
|
|
|
|
/* must wait for at least 1ms */
|
|
udelay(100000000);
|
|
|
|
/* set mac addr */
|
|
{
|
|
uchar mac_addr[6];
|
|
int i;
|
|
|
|
if (!eth_getenv_enetaddr("ethaddr", mac_addr)) {
|
|
el_get_mac_addr(mac_addr);
|
|
eth_setenv_enetaddr("ethaddr", mac_addr);
|
|
}
|
|
|
|
GO_WINDOW(2);
|
|
VX_BUSY_WAIT;
|
|
|
|
printf("3C589 MAC Addr.: ");
|
|
for (i = 0; i < 6; i++)
|
|
{
|
|
printf("%02x", mac_addr[i]);
|
|
outb(mac_addr[i], BASE + VX_W2_ADDR_0 + i);
|
|
VX_BUSY_WAIT;
|
|
}
|
|
printf("\n\n");
|
|
}
|
|
|
|
/* set RX filter */
|
|
outw(SET_RX_FILTER | FIL_INDIVIDUAL | FIL_BRDCST, BASE + VX_COMMAND);
|
|
VX_BUSY_WAIT;
|
|
|
|
|
|
/* set irq mask and read_zero */
|
|
outw(SET_RD_0_MASK | S_CARD_FAILURE | S_RX_COMPLETE |
|
|
S_TX_COMPLETE | S_TX_AVAIL, BASE + VX_COMMAND);
|
|
VX_BUSY_WAIT;
|
|
|
|
outw(SET_INTR_MASK | S_CARD_FAILURE | S_RX_COMPLETE |
|
|
S_TX_COMPLETE | S_TX_AVAIL, BASE + VX_COMMAND);
|
|
VX_BUSY_WAIT;
|
|
|
|
/* enable TP Linkbeat */
|
|
GO_WINDOW(4);
|
|
VX_BUSY_WAIT;
|
|
|
|
outw( ENABLE_UTP, BASE + VX_W4_MEDIA_TYPE);
|
|
VX_BUSY_WAIT;
|
|
|
|
|
|
/*
|
|
* Attempt to get rid of any stray interrupts that occured during
|
|
* configuration. On the i386 this isn't possible because one may
|
|
* already be queued. However, a single stray interrupt is
|
|
* unimportant.
|
|
*/
|
|
|
|
outw(ACK_INTR | 0xff, BASE + VX_COMMAND);
|
|
VX_BUSY_WAIT;
|
|
|
|
/* enable TX and RX */
|
|
outw( RX_ENABLE, BASE + VX_COMMAND );
|
|
VX_BUSY_WAIT;
|
|
|
|
outw( TX_ENABLE, BASE + VX_COMMAND );
|
|
VX_BUSY_WAIT;
|
|
|
|
|
|
/* print the diag. regs. */
|
|
PRINTK2("Diag. Regs\n");
|
|
PRINTK2("--> MEDIA_TYPE: %04x\n", inw(BASE + VX_W4_MEDIA_TYPE));
|
|
PRINTK2("--> NET_DIAG: %04x\n", inw(BASE + VX_W4_NET_DIAG));
|
|
PRINTK2("--> FIFO_DIAG: %04x\n", inw(BASE + VX_W4_FIFO_DIAG));
|
|
PRINTK2("--> CTRLR_STATUS: %04x\n", inw(BASE + VX_W4_CTRLR_STATUS));
|
|
PRINTK2("\n\n");
|
|
|
|
/* enter working mode */
|
|
GO_WINDOW(1);
|
|
VX_BUSY_WAIT;
|
|
|
|
/* wait for another 1ms */
|
|
udelay(100000000);
|
|
}
|
|
|
|
|
|
/*-----------------------------------------------------------------
|
|
.
|
|
. The driver can be entered at any of the following entry points.
|
|
.
|
|
.------------------------------------------------------------------ */
|
|
|
|
extern int eth_init(bd_t *bd);
|
|
extern void eth_halt(void);
|
|
extern int eth_rx(void);
|
|
extern int eth_send(volatile void *packet, int length);
|
|
|
|
|
|
/*
|
|
------------------------------------------------------------
|
|
.
|
|
. Internal routines
|
|
.
|
|
------------------------------------------------------------
|
|
*/
|
|
|
|
int eth_init(bd_t *bd)
|
|
{
|
|
el_reset(bd);
|
|
return 0;
|
|
}
|
|
|
|
void eth_halt() {
|
|
return;
|
|
}
|
|
|
|
#define EDEBUG 1
|
|
|
|
|
|
/**************************************************************************
|
|
ETH_POLL - Wait for a frame
|
|
***************************************************************************/
|
|
|
|
int eth_rx()
|
|
{
|
|
word status, rx_status, packet_size;
|
|
|
|
VX_BUSY_WAIT;
|
|
|
|
status = inw( BASE + VX_STATUS );
|
|
|
|
if ( (status & S_RX_COMPLETE) == 0 ) return 0; /* nothing to do */
|
|
|
|
/* Packet waiting -> check RX_STATUS */
|
|
rx_status = inw( BASE + VX_W1_RX_STATUS );
|
|
|
|
if ( rx_status & ERR_RX )
|
|
{
|
|
/* error in packet -> discard */
|
|
PRINTK("[ERROR] Invalid packet -> discarding\n");
|
|
PRINTK("-- error code 0x%02x\n", rx_status & ERR_MASK);
|
|
PRINTK("-- rx bytes 0x%04d\n", rx_status & ((1<<11) - 1));
|
|
PRINTK("[ERROR] Invalid packet -> discarding\n");
|
|
outw( RX_DISCARD_TOP_PACK, BASE + VX_COMMAND );
|
|
return 0;
|
|
}
|
|
|
|
/* correct pack. waiting in fifo */
|
|
packet_size = rx_status & RX_BYTES_MASK;
|
|
|
|
PRINTK("Correct packet waiting in fifo, size: %d\n", packet_size);
|
|
|
|
{
|
|
volatile word *packet_start = (word *)(BASE + VX_W1_RX_PIO_RD_1);
|
|
word *RcvBuffer = (word *)(NetRxPackets[0]);
|
|
int wcount = 0;
|
|
|
|
for (wcount = 0; wcount < (packet_size >> 1); wcount++)
|
|
{
|
|
*RcvBuffer++ = *(packet_start);
|
|
}
|
|
|
|
/* handle odd packets */
|
|
if ( packet_size & 1 )
|
|
{
|
|
*RcvBuffer++ = *(packet_start);
|
|
}
|
|
}
|
|
|
|
/* fifo should now be empty (besides the padding bytes) */
|
|
if ( ((*((word *)(BASE + VX_W1_RX_STATUS))) & RX_BYTES_MASK) > 3 )
|
|
{
|
|
PRINTK("[ERROR] Fifo not empty after packet read (remaining pkts: %d)\n",
|
|
(((*(word *)(BASE + VX_W1_RX_STATUS))) & RX_BYTES_MASK));
|
|
}
|
|
|
|
/* discard packet */
|
|
*((word *)(BASE + VX_COMMAND)) = RX_DISCARD_TOP_PACK;
|
|
|
|
/* Pass Packets to upper Layer */
|
|
NetReceive(NetRxPackets[0], packet_size);
|
|
return packet_size;
|
|
}
|
|
|
|
|
|
/**************************************************************************
|
|
ETH_TRANSMIT - Transmit a frame
|
|
***************************************************************************/
|
|
static char padmap[] = {
|
|
0, 3, 2, 1};
|
|
|
|
|
|
int eth_send(volatile void *packet, int length) {
|
|
int pad;
|
|
int status;
|
|
volatile word *buf = (word *)packet;
|
|
int dummy = 0;
|
|
|
|
/* padding stuff */
|
|
pad = padmap[length & 3];
|
|
|
|
PRINTK("eth_send(), length: %d\n", length);
|
|
/* drop acknowledgements */
|
|
while(( status=inb(EL_BASE_ADDR + VX_W1_TX_STATUS) )& TXS_COMPLETE ) {
|
|
if(status & (TXS_UNDERRUN|TXS_MAX_COLLISION|TXS_STATUS_OVERFLOW)) {
|
|
outw(TX_RESET, EL_BASE_ADDR + VX_COMMAND);
|
|
outw(TX_ENABLE, EL_BASE_ADDR + VX_COMMAND);
|
|
PRINTK("Bad status, resetting and reenabling transmitter\n");
|
|
}
|
|
|
|
outb(0x0, EL_BASE_ADDR + VX_W1_TX_STATUS);
|
|
}
|
|
|
|
|
|
while (inw(EL_BASE_ADDR + VX_W1_FREE_TX) < length + pad + 4) {
|
|
/* no room in FIFO */
|
|
if (dummy == 0)
|
|
{
|
|
PRINTK("No room in FIFO, waiting...\n");
|
|
dummy++;
|
|
}
|
|
|
|
}
|
|
|
|
PRINTK(" ---> FIFO ready\n");
|
|
|
|
|
|
outw(length, EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
|
|
|
|
/* Second dword meaningless */
|
|
outw(0x0, EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
|
|
|
|
#if EL_DEBUG > 1
|
|
print_packet((byte *)buf, length);
|
|
#endif
|
|
|
|
/* write packet */
|
|
{
|
|
unsigned int i, totw;
|
|
|
|
totw = ((length + 1) >> 1);
|
|
PRINTK("Buffer: (totw = %d)\n", totw);
|
|
for (i = 0; i < totw; i++) {
|
|
outw( *(buf+i), EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
|
|
udelay(10);
|
|
}
|
|
if(totw & 1)
|
|
{ /* pad to double word length */
|
|
outw( 0, EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
|
|
udelay(10);
|
|
}
|
|
PRINTK("\n\n");
|
|
}
|
|
|
|
/* wait for Tx complete */
|
|
PRINTK("Waiting for Tx to complete...\n");
|
|
while(((status = inw(EL_BASE_ADDR + VX_STATUS)) & S_COMMAND_IN_PROGRESS) != 0)
|
|
{
|
|
udelay(10);
|
|
}
|
|
PRINTK(" ---> Tx completed, status = 0x%04x\n", status);
|
|
|
|
return length;
|
|
}
|