Ok. I didn't make 2.4.0 in 2000. Tough. I tried, but we had some

[davej-history.git] / drivers / net / eepro.c

/* eepro.c: Intel EtherExpress Pro/10 device driver for Linux. */
/*
 Written 1994, 1995,1996 by Bao C. Ha.

 Copyright (C) 1994, 1995,1996 by Bao C. Ha.

 This software may be used and distributed
 according to the terms of the GNU Public License,
 incorporated herein by reference.

 The author may be reached at bao.ha@srs.gov 
 or 418 Hastings Place, Martinez, GA 30907.

 Things remaining to do:
 Better record keeping of errors.
 Eliminate transmit interrupt to reduce overhead.
 Implement "concurrent processing". I won't be doing it!

 Bugs:

 If you have a problem of not detecting the 82595 during a
 reboot (warm reset), disable the FLASH memory should fix it.
 This is a compatibility hardware problem.

 Versions:
 0.12b misc fixes (aris, 06/26/2000)
 0.12a port of version 0.12a of 2.2.x kernels to 2.3.x
 (aris (aris@conectiva.com.br), 05/19/2000)
 0.11e some tweaks about multiple cards support (PdP, jul/aug 1999)
 0.11d added __initdata, __init stuff; call spin_lock_init
 in eepro_probe1. Replaced "eepro" by dev->name. Augmented 
 the code protected by spin_lock in interrupt routine 
 (PdP, 12/12/1998)
 0.11c minor cleanup (PdP, RMC, 09/12/1998) 
 0.11b Pascal Dupuis (dupuis@lei.ucl.ac.be): works as a module 
 under 2.1.xx. Debug messages are flagged as KERN_DEBUG to 
 avoid console flooding. Added locking at critical parts. Now 
 the dawn thing is SMP safe.
 0.11a Attempt to get 2.1.xx support up (RMC)
 0.11 Brian Candler added support for multiple cards. Tested as
 a module, no idea if it works when compiled into kernel.

 0.10e Rick Bressler notified me that ifconfig up;ifconfig down fails
 because the irq is lost somewhere. Fixed that by moving 
 request_irq and free_irq to eepro_open and eepro_close respectively.
 0.10d Ugh! Now Wakeup works. Was seriously broken in my first attempt.
 I'll need to find a way to specify an ioport other than
 the default one in the PnP case. PnP definitively sucks.
 And, yes, this is not the only reason.
 0.10c PnP Wakeup Test for 595FX. uncomment #define PnPWakeup;
 to use.
 0.10b Should work now with (some) Pro/10+. At least for 
 me (and my two cards) it does. _No_ guarantee for 
 function with non-Pro/10+ cards! (don't have any)
 (RMC, 9/11/96)

 0.10 Added support for the Etherexpress Pro/10+. The
 IRQ map was changed significantly from the old
 pro/10. The new interrupt map was provided by
 Rainer M. Canavan (Canavan@Zeus.cs.bonn.edu).
 (BCH, 9/3/96)

 0.09 Fixed a race condition in the transmit algorithm,
 which causes crashes under heavy load with fast
 pentium computers. The performance should also
 improve a bit. The size of RX buffer, and hence
 TX buffer, can also be changed via lilo or insmod.
 (BCH, 7/31/96)

 0.08 Implement 32-bit I/O for the 82595TX and 82595FX
 based lan cards. Disable full-duplex mode if TPE
 is not used. (BCH, 4/8/96)

 0.07a Fix a stat report which counts every packet as a
 heart-beat failure. (BCH, 6/3/95)

 0.07 Modified to support all other 82595-based lan cards. 
 The IRQ vector of the EtherExpress Pro will be set
 according to the value saved in the EEPROM. For other
 cards, I will do autoirq_request() to grab the next
 available interrupt vector. (BCH, 3/17/95)

 0.06a,b Interim released. Minor changes in the comments and
 print out format. (BCH, 3/9/95 and 3/14/95)

 0.06 First stable release that I am comfortable with. (BCH,
 3/2/95) 

 0.05 Complete testing of multicast. (BCH, 2/23/95) 

 0.04 Adding multicast support. (BCH, 2/14/95) 

 0.03 First widely alpha release for public testing. 
 (BCH, 2/14/95) 

*/

static const char*version =
"eepro.c: v0.12b 04/26/2000 aris@conectiva.com.br\n";

#include <linux/module.h>

/*
 Sources:

 This driver wouldn't have been written without the availability 
 of the Crynwr's Lan595 driver source code. It helps me to 
 familiarize with the 82595 chipset while waiting for the Intel 
 documentation. I also learned how to detect the 82595 using 
 the packet driver's technique.

 This driver is written by cutting and pasting the skeleton.c driver
 provided by Donald Becker. I also borrowed the EEPROM routine from
 Donald Becker's 82586 driver.

 Datasheet for the Intel 82595 (including the TX and FX version). It 
 provides just enough info that the casual reader might think that it 
 documents the i82595.

 The User Manual for the 82595. It provides a lot of the missing
 information.

*/

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/malloc.h>
#include <linux/string.h>
#include <asm/system.h>
#include <asm/bitops.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <linux/errno.h>

#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/init.h>
#include <linux/delay.h>

#define compat_dev_kfree_skb( skb, mode ) dev_kfree_skb( (skb) )
/* I had reports of looong delays with SLOW_DOWN defined as udelay(2) */
#define SLOW_DOWN inb(0x80)
/* udelay(2) */
#define compat_init_data __initdata


/* First, a few definitions that the brave might change. */
/* A zero-terminated list of I/O addresses to be probed. */
static unsigned int eepro_portlist[] compat_init_data =
{0x300,0x210,0x240,0x280,0x2C0,0x200,0x320,0x340,0x360,0};
/* note: 0x300 is default, the 595FX supports ALL IO Ports 
 from 0x000 to 0x3F0, some of which are reserved in PCs */

/* To try the (not-really PnP Wakeup: */
/*
#define PnPWakeup
*/

/* use 0 for production, 1 for verification, >2 for debug */
#ifndef NET_DEBUG
#define NET_DEBUG 0
#endif
static unsigned int net_debug = NET_DEBUG;

/* The number of low I/O ports used by the ethercard. */
#define EEPRO_IO_EXTENT 16

/* Different 82595 chips */
#define LAN595 0
#define LAN595TX 1
#define LAN595FX 2
#define LAN595FX_10ISA 3

/* Information that need to be kept for each board. */
struct eepro_local {
struct net_device_stats stats;
unsigned rx_start;
unsigned tx_start;/* start of the transmit chain */
int tx_last;/* pointer to last packet in the transmit chain */
unsigned tx_end;/* end of the transmit chain (plus 1) */
int eepro;/* 1 for the EtherExpress Pro/10,
 2 for the EtherExpress Pro/10+,
 0 for other 82595-based lan cards. */
int version;/* a flag to indicate if this is a TX or FX
 version of the 82595 chip. */
int stepping;

 spinlock_t lock;/* Serializing lock */
};

/* The station (ethernet) address prefix, used for IDing the board. */
#define SA_ADDR0 0x00/* Etherexpress Pro/10 */
#define SA_ADDR1 0xaa
#define SA_ADDR2 0x00

#define GetBit(x,y) ((x & (1<<y))>>y)

/* EEPROM Word 0: */
#define ee_PnP 0/* Plug 'n Play enable bit */
#define ee_Word1 1/* Word 1? */
#define ee_BusWidth 2/* 8/16 bit */
#define ee_FlashAddr 3/* Flash Address */
#define ee_FlashMask 0x7/* Mask */
#define ee_AutoIO 6/* */
#define ee_reserved0 7/* =0! */
#define ee_Flash 8/* Flash there? */
#define ee_AutoNeg 9/* Auto Negotiation enabled? */
#define ee_IO0 10/* IO Address LSB */
#define ee_IO0Mask 0x/*...*/
#define ee_IO1 15/* IO MSB */

/* EEPROM Word 1: */
#define ee_IntSel 0/* Interrupt */
#define ee_IntMask 0x7
#define ee_LI 3/* Link Integrity 0= enabled */
#define ee_PC 4/* Polarity Correction 0= enabled */
#define ee_TPE_AUI 5/* PortSelection 1=TPE */
#define ee_Jabber 6/* Jabber prevention 0= enabled */
#define ee_AutoPort 7/* Auto Port Selection 1= Disabled */
#define ee_SMOUT 8/* SMout Pin Control 0= Input */
#define ee_PROM 9/* Flash EPROM / PROM 0=Flash */
#define ee_reserved1 10/* .. 12 =0! */
#define ee_AltReady 13/* Alternate Ready, 0=normal */
#define ee_reserved2 14/* =0! */
#define ee_Duplex 15

/* Word2,3,4: */
#define ee_IA5 0/*bit start for individual Addr Byte 5 */
#define ee_IA4 8/*bit start for individual Addr Byte 5 */
#define ee_IA3 0/*bit start for individual Addr Byte 5 */
#define ee_IA2 8/*bit start for individual Addr Byte 5 */
#define ee_IA1 0/*bit start for individual Addr Byte 5 */
#define ee_IA0 8/*bit start for individual Addr Byte 5 */

/* Word 5: */
#define ee_BNC_TPE 0/* 0=TPE */
#define ee_BootType 1/* 00=None, 01=IPX, 10=ODI, 11=NDIS */
#define ee_BootTypeMask 0x3 
#define ee_NumConn 3/* Number of Connections 0= One or Two */
#define ee_FlashSock 4/* Presence of Flash Socket 0= Present */
#define ee_PortTPE 5
#define ee_PortBNC 6
#define ee_PortAUI 7
#define ee_PowerMgt 10/* 0= disabled */
#define ee_CP 13/* Concurrent Processing */
#define ee_CPMask 0x7

/* Word 6: */
#define ee_Stepping 0/* Stepping info */
#define ee_StepMask 0x0F
#define ee_BoardID 4/* Manucaturer Board ID, reserved */
#define ee_BoardMask 0x0FFF

/* Word 7: */
#define ee_INT_TO_IRQ 0/* int to IRQ Mapping = 0x1EB8 for Pro/10+ */
#define ee_FX_INT2IRQ 0x1EB8/* the _only_ mapping allowed for FX chips */

/*..*/
#define ee_SIZE 0x40/* total EEprom Size */
#define ee_Checksum 0xBABA/* initial and final value for adding checksum */


/* Card identification via EEprom: */
#define ee_addr_vendor 0x10/* Word offset for EISA Vendor ID */
#define ee_addr_id 0x11/* Word offset for Card ID */
#define ee_addr_SN 0x12/* Serial Number */
#define ee_addr_CRC_8 0x14/* CRC over last thee Bytes */


#define ee_vendor_intel0 0x25/* Vendor ID Intel */
#define ee_vendor_intel1 0xD4
#define ee_id_eepro10p0 0x10/* ID for eepro/10+ */
#define ee_id_eepro10p1 0x31

#define TX_TIMEOUT 40

/* Index to functions, as function prototypes. */

externinteepro_probe(struct net_device *dev);

static inteepro_probe1(struct net_device *dev,short ioaddr);
static inteepro_open(struct net_device *dev);
static inteepro_send_packet(struct sk_buff *skb,struct net_device *dev);
static voideepro_interrupt(int irq,void*dev_id,struct pt_regs *regs);
static voideepro_rx(struct net_device *dev);
static voideepro_transmit_interrupt(struct net_device *dev);
static inteepro_close(struct net_device *dev);
static struct net_device_stats *eepro_get_stats(struct net_device *dev);
static voidset_multicast_list(struct net_device *dev);
static voideepro_tx_timeout(struct net_device *dev);

static intread_eeprom(int ioaddr,int location,struct net_device *dev);
static voidhardware_send_packet(struct net_device *dev,void*buf,short length);
static inteepro_grab_irq(struct net_device *dev);

/*
 Details of the i82595.

You will need either the datasheet or the user manual to understand what
is going on here. The 82595 is very different from the 82586, 82593.

The receive algorithm in eepro_rx() is just an implementation of the
RCV ring structure that the Intel 82595 imposes at the hardware level.
The receive buffer is set at 24K, and the transmit buffer is 8K. I
am assuming that the total buffer memory is 32K, which is true for the
Intel EtherExpress Pro/10. If it is less than that on a generic card,
the driver will be broken.

The transmit algorithm in the hardware_send_packet() is similar to the
one in the eepro_rx(). The transmit buffer is a ring linked list.
I just queue the next available packet to the end of the list. In my
system, the 82595 is so fast that the list seems to always contain a
single packet. In other systems with faster computers and more congested
network traffics, the ring linked list should improve performance by
allowing up to 8K worth of packets to be queued.

The sizes of the receive and transmit buffers can now be changed via lilo 
or insmod. Lilo uses the appended line "ether=io,irq,debug,rx-buffer,eth0"
where rx-buffer is in KB unit. Modules uses the parameter mem which is
also in KB unit, for example "insmod io=io-address irq=0 mem=rx-buffer." 
The receive buffer has to be more than 3K or less than 29K. Otherwise,
it is reset to the default of 24K, and, hence, 8K for the trasnmit
buffer (transmit-buffer = 32K - receive-buffer).

*/
/* now this section could be used by both boards: the oldies and the ee10:
 * ee10 uses tx buffer before of rx buffer and the oldies the inverse.
 * (aris)
 */
#define RAM_SIZE 0x8000

#define RCV_HEADER 8
#define RCV_DEFAULT_RAM 0x6000
#define RCV_RAM rcv_ram

static unsigned rcv_ram = RCV_DEFAULT_RAM;

#define XMT_HEADER 8
#define XMT_RAM (RAM_SIZE - RCV_RAM)

#define XMT_START ((rcv_start + RCV_RAM) % RAM_SIZE)

#define RCV_LOWER_LIMIT (rcv_start >> 8)
#define RCV_UPPER_LIMIT (((rcv_start + RCV_RAM) - 2) >> 8)
#define XMT_LOWER_LIMIT (XMT_START >> 8)
#define XMT_UPPER_LIMIT (((XMT_START + XMT_RAM) - 2) >> 8)

#define RCV_START_PRO 0x00
#define RCV_START_10 XMT_RAM
/* by default the old driver */
static unsigned rcv_start = RCV_START_PRO;

#define RCV_DONE 0x0008
#define RX_OK 0x2000
#define RX_ERROR 0x0d81

#define TX_DONE_BIT 0x0080
#define CHAIN_BIT 0x8000
#define XMT_STATUS 0x02
#define XMT_CHAIN 0x04
#define XMT_COUNT 0x06

#define BANK0_SELECT 0x00 
#define BANK1_SELECT 0x40 
#define BANK2_SELECT 0x80 

/* Bank 0 registers */
#define COMMAND_REG 0x00/* Register 0 */
#define MC_SETUP 0x03
#define XMT_CMD 0x04
#define DIAGNOSE_CMD 0x07
#define RCV_ENABLE_CMD 0x08
#define RCV_DISABLE_CMD 0x0a
#define STOP_RCV_CMD 0x0b
#define RESET_CMD 0x0e
#define POWER_DOWN_CMD 0x18
#define RESUME_XMT_CMD 0x1c
#define SEL_RESET_CMD 0x1e
#define STATUS_REG 0x01/* Register 1 */
#define RX_INT 0x02
#define TX_INT 0x04
#define EXEC_STATUS 0x30
#define ID_REG 0x02/* Register 2 */
#define R_ROBIN_BITS 0xc0/* round robin counter */
#define ID_REG_MASK 0x2c
#define ID_REG_SIG 0x24
#define AUTO_ENABLE 0x10
#define INT_MASK_REG 0x03/* Register 3 */
#define RX_STOP_MASK 0x01
#define RX_MASK 0x02
#define TX_MASK 0x04
#define EXEC_MASK 0x08
#define ALL_MASK 0x0f
#define IO_32_BIT 0x10
#define RCV_BAR 0x04/* The following are word (16-bit) registers */
#define RCV_STOP 0x06

#define XMT_BAR_PRO 0x0a
#define XMT_BAR_10 0x0b
static unsigned xmt_bar = XMT_BAR_PRO;

#define HOST_ADDRESS_REG 0x0c
#define IO_PORT 0x0e
#define IO_PORT_32_BIT 0x0c

/* Bank 1 registers */
#define REG1 0x01
#define WORD_WIDTH 0x02
#define INT_ENABLE 0x80
#define INT_NO_REG 0x02
#define RCV_LOWER_LIMIT_REG 0x08
#define RCV_UPPER_LIMIT_REG 0x09

#define XMT_LOWER_LIMIT_REG_PRO 0x0a
#define XMT_UPPER_LIMIT_REG_PRO 0x0b
#define XMT_LOWER_LIMIT_REG_10 0x0b
#define XMT_UPPER_LIMIT_REG_10 0x0a
static unsigned xmt_lower_limit_reg = XMT_LOWER_LIMIT_REG_PRO;
static unsigned xmt_upper_limit_reg = XMT_UPPER_LIMIT_REG_PRO;

/* Bank 2 registers */
#define XMT_Chain_Int 0x20/* Interrupt at the end of the transmit chain */
#define XMT_Chain_ErrStop 0x40/* Interrupt at the end of the chain even if there are errors */
#define RCV_Discard_BadFrame 0x80/* Throw bad frames away, and continue to receive others */
#define REG2 0x02
#define PRMSC_Mode 0x01
#define Multi_IA 0x20
#define REG3 0x03
#define TPE_BIT 0x04
#define BNC_BIT 0x20
#define REG13 0x0d
#define FDX 0x00
#define A_N_ENABLE 0x02

#define I_ADD_REG0 0x04
#define I_ADD_REG1 0x05
#define I_ADD_REG2 0x06
#define I_ADD_REG3 0x07
#define I_ADD_REG4 0x08
#define I_ADD_REG5 0x09

#define EEPROM_REG_PRO 0x0a
#define EEPROM_REG_10 0x0b
static unsigned eeprom_reg = EEPROM_REG_PRO;

#define EESK 0x01
#define EECS 0x02
#define EEDI 0x04
#define EEDO 0x08

/* do a full reset */
#define eepro_reset(ioaddr) outb(RESET_CMD, ioaddr)

/* do a nice reset */
#define eepro_sel_reset(ioaddr) { \
 outb(SEL_RESET_CMD, ioaddr); \
 SLOW_DOWN; \
 SLOW_DOWN; \
 }

/* disable all interrupts */
#define eepro_dis_int(ioaddr) outb(ALL_MASK, ioaddr + INT_MASK_REG)

/* clear all interrupts */
#define eepro_clear_int(ioaddr) outb(ALL_MASK, ioaddr + STATUS_REG)

/* enable tx/rx */
#define eepro_en_int(ioaddr) outb(ALL_MASK & ~(RX_MASK | TX_MASK), \
 ioaddr + INT_MASK_REG)

/* enable exec event interrupt */
#define eepro_en_intexec(ioaddr) outb(ALL_MASK & ~(EXEC_MASK), ioaddr + INT_MASK_REG)

/* enable rx */
#define eepro_en_rx(ioaddr) outb(RCV_ENABLE_CMD, ioaddr)

/* disable rx */
#define eepro_dis_rx(ioaddr) outb(RCV_DISABLE_CMD, ioaddr)

/* switch bank */
#define eepro_sw2bank0(ioaddr) outb(BANK0_SELECT, ioaddr)
#define eepro_sw2bank1(ioaddr) outb(BANK1_SELECT, ioaddr)
#define eepro_sw2bank2(ioaddr) outb(BANK2_SELECT, ioaddr)

/* enable interrupt line */
#define eepro_en_intline(ioaddr) outb(inb(ioaddr + REG1) | INT_ENABLE,\
 ioaddr + REG1)

/* disable interrupt line */
#define eepro_dis_intline(ioaddr) outb(inb(ioaddr + REG1) & 0x7f, \
 ioaddr + REG1);

/* set diagnose flag */
#define eepro_diag(ioaddr) outb(DIAGNOSE_CMD, ioaddr)

/* ack for rx/tx int */
#define eepro_ack_rxtx(ioaddr) outb (RX_INT | TX_INT, ioaddr + STATUS_REG)

/* ack for rx int */
#define eepro_ack_rx(ioaddr) outb (RX_INT, ioaddr + STATUS_REG)

/* ack for tx int */
#define eepro_ack_tx(ioaddr) outb (TX_INT, ioaddr + STATUS_REG)

/* a complete sel reset */
#define eepro_complete_selreset(ioaddr) { eepro_dis_int(ioaddr);\
 lp->stats.tx_errors++;\
 eepro_sel_reset(ioaddr);\
 lp->tx_end = \
 (XMT_LOWER_LIMIT << 8);\
 lp->tx_start = lp->tx_end;\
 lp->tx_last = 0;\
 dev->trans_start = jiffies;\
 netif_wake_queue(dev);\
 eepro_en_int(ioaddr);\
 eepro_en_rx(ioaddr);\
 }

/* Check for a network adaptor of this type, and return '0' if one exists.
 If dev->base_addr == 0, probe all likely locations.
 If dev->base_addr == 1, always return failure.
 If dev->base_addr == 2, allocate space for the device and return success
 (detachable devices only).
 */
int __init eepro_probe(struct net_device *dev)
{
int i;
int base_addr = dev->base_addr;

SET_MODULE_OWNER(dev);

#ifdef PnPWakeup
/* XXXX for multiple cards should this only be run once? */

/* Wakeup: */
#define WakeupPort 0x279
#define WakeupSeq {0x6A, 0xB5, 0xDA, 0xED, 0xF6, 0xFB, 0x7D, 0xBE,\
 0xDF, 0x6F, 0x37, 0x1B, 0x0D, 0x86, 0xC3, 0x61,\
 0xB0, 0x58, 0x2C, 0x16, 0x8B, 0x45, 0xA2, 0xD1,\
 0xE8, 0x74, 0x3A, 0x9D, 0xCE, 0xE7, 0x73, 0x43}

{
unsigned short int WS[32]=WakeupSeq;

if(check_region(WakeupPort,2)==0) {

if(net_debug>5)
printk(KERN_DEBUG "Waking UP\n");

outb_p(0,WakeupPort);
outb_p(0,WakeupPort);
for(i=0; i<32; i++) {
outb_p(WS[i],WakeupPort);
if(net_debug>5)printk(KERN_DEBUG ": %#x ",WS[i]);
}
}elseprintk(KERN_WARNING "Checkregion Failed!\n");
}
#endif


if(base_addr >0x1ff)/* Check a single specified location. */
returneepro_probe1(dev, base_addr);

else if(base_addr !=0)/* Don't probe at all. */
return-ENXIO;


for(i =0; eepro_portlist[i]; i++) {
int ioaddr = eepro_portlist[i];

if(check_region(ioaddr, EEPRO_IO_EXTENT))
continue;
if(eepro_probe1(dev, ioaddr) ==0)
return0;
}

return-ENODEV;
}

voidprintEEPROMInfo(short ioaddr,struct net_device *dev)
{
unsigned short Word;
int i,j;

for(i=0, j=ee_Checksum; i<ee_SIZE; i++)
 j+=read_eeprom(ioaddr,i,dev);
printk("Checksum: %#x\n",j&0xffff);

 Word=read_eeprom(ioaddr,0, dev);
printk(KERN_DEBUG "Word0:\n");
printk(KERN_DEBUG " Plug 'n Pray: %d\n",GetBit(Word,ee_PnP));
printk(KERN_DEBUG " Buswidth: %d\n",(GetBit(Word,ee_BusWidth)+1)*8);
printk(KERN_DEBUG " AutoNegotiation: %d\n",GetBit(Word,ee_AutoNeg));
printk(KERN_DEBUG " IO Address: %#x\n", (Word>>ee_IO0)<<4);

if(net_debug>4) {
 Word=read_eeprom(ioaddr,1, dev);
printk(KERN_DEBUG "Word1:\n");
printk(KERN_DEBUG " INT: %d\n", Word & ee_IntMask);
printk(KERN_DEBUG " LI: %d\n",GetBit(Word,ee_LI));
printk(KERN_DEBUG " PC: %d\n",GetBit(Word,ee_PC));
printk(KERN_DEBUG " TPE/AUI: %d\n",GetBit(Word,ee_TPE_AUI));
printk(KERN_DEBUG " Jabber: %d\n",GetBit(Word,ee_Jabber));
printk(KERN_DEBUG " AutoPort: %d\n",GetBit(!Word,ee_Jabber));
printk(KERN_DEBUG " Duplex: %d\n",GetBit(Word,ee_Duplex));
}

 Word=read_eeprom(ioaddr,5, dev);
printk(KERN_DEBUG "Word5:\n");
printk(KERN_DEBUG " BNC: %d\n",GetBit(Word,ee_BNC_TPE));
printk(KERN_DEBUG " NumConnectors: %d\n",GetBit(Word,ee_NumConn));
printk(KERN_DEBUG " Has ");
if(GetBit(Word,ee_PortTPE))printk("TPE ");
if(GetBit(Word,ee_PortBNC))printk("BNC ");
if(GetBit(Word,ee_PortAUI))printk("AUI ");
printk("port(s)\n");

 Word=read_eeprom(ioaddr,6, dev);
printk(KERN_DEBUG "Word6:\n");
printk(KERN_DEBUG " Stepping: %d\n",Word & ee_StepMask);
printk(KERN_DEBUG " BoardID: %d\n",Word>>ee_BoardID);

 Word=read_eeprom(ioaddr,7, dev);
printk(KERN_DEBUG "Word7:\n");
printk(KERN_DEBUG " INT to IRQ:\n");

printk(KERN_DEBUG);

for(i=0, j=0; i<15; i++)
if(GetBit(Word,i))printk(" INT%d -> IRQ %d;",j++,i);

printk("\n");
}

/* This is the real probe routine. Linux has a history of friendly device
 probes on the ISA bus. A good device probe avoids doing writes, and
 verifies that the correct device exists and functions. */

static inteepro_probe1(struct net_device *dev,short ioaddr)
{
unsigned short station_addr[6], id, counter;
int i,j, irqMask;
int eepro =0;
struct eepro_local *lp;
const char*ifmap[] = {"AUI","10Base2","10BaseT"};
enum iftype { AUI=0, BNC=1, TPE=2};

/* Now, we are going to check for the signature of the
 ID_REG (register 2 of bank 0) */

 id=inb(ioaddr + ID_REG);

if(((id) & ID_REG_MASK) == ID_REG_SIG) {

/* We seem to have the 82595 signature, let's
 play with its counter (last 2 bits of
 register 2 of bank 0) to be sure. */

 counter = (id & R_ROBIN_BITS);
if(((id=inb(ioaddr+ID_REG)) & R_ROBIN_BITS) ==
(counter +0x40)) {

/* Yes, the 82595 has been found */
printk(KERN_DEBUG " id: %#x ",id);
printk(" io: %#x ",ioaddr);

/* Initialize the device structure */
 dev->priv =kmalloc(sizeof(struct eepro_local), GFP_KERNEL);
if(dev->priv == NULL)
return-ENOMEM;
memset(dev->priv,0,sizeof(struct eepro_local));

 lp = (struct eepro_local *)dev->priv;

/* Now, get the ethernet hardware address from
 the EEPROM */

 station_addr[0] =read_eeprom(ioaddr,2, dev);

/* FIXME - find another way to know that we've found
 * an Etherexpress 10
 */
if(station_addr[0] ==0x0000||
 station_addr[0] ==0xffff) {
 eepro =3;
 lp->eepro = LAN595FX_10ISA;
 eeprom_reg = EEPROM_REG_10;
 rcv_start = RCV_START_10;
 xmt_lower_limit_reg = XMT_LOWER_LIMIT_REG_10;
 xmt_upper_limit_reg = XMT_UPPER_LIMIT_REG_10;

 station_addr[0] =read_eeprom(ioaddr,2, dev);
}

 station_addr[1] =read_eeprom(ioaddr,3, dev);
 station_addr[2] =read_eeprom(ioaddr,4, dev);

if(eepro) {
printk("%s: Intel EtherExpress 10 ISA\nat %#x,",
 dev->name, ioaddr);
}else if(read_eeprom(ioaddr,7,dev)== ee_FX_INT2IRQ) {
/* int to IRQ Mask */
 eepro =2;
printk("%s: Intel EtherExpress Pro/10+ ISA\nat %#x,",
 dev->name, ioaddr);
}else
if(station_addr[2] ==0x00aa) {
 eepro =1;
printk("%s: Intel EtherExpress Pro/10 ISA at %#x,",
 dev->name, ioaddr);
}
else{
 eepro =0;
printk("%s: Intel 82595-based lan card at %#x,",
 dev->name, ioaddr);
}

/* Fill in the 'dev' fields. */
 dev->base_addr = ioaddr;

for(i=0; i <6; i++) {
 dev->dev_addr[i] = ((unsigned char*) station_addr)[5-i];
printk("%c%02x", i ?':':' ', dev->dev_addr[i]);
}

 dev->mem_start = (RCV_LOWER_LIMIT <<8);

if((dev->mem_end &0x3f) <3||/* RX buffer must be more than 3K */
(dev->mem_end &0x3f) >29)/* and less than 29K */
 dev->mem_end = (RCV_UPPER_LIMIT <<8);
else{
 dev->mem_end = (dev->mem_end *1024) +
(RCV_LOWER_LIMIT <<8);
 rcv_ram = dev->mem_end - (RCV_LOWER_LIMIT <<8);
}

/* From now on, dev->mem_end - dev->mem_start contains 
 * the actual size of rx buffer 
 */

if(net_debug >3)
printk(", %dK RCV buffer", (int)(dev->mem_end -
 dev->mem_start)/1024);


/* ............... */

if(GetBit(read_eeprom(ioaddr,5, dev),ee_BNC_TPE))
 dev->if_port = BNC;
else dev->if_port = TPE;

/* ............... */


if((dev->irq <2) && (eepro!=0)) {
 i =read_eeprom(ioaddr,1, dev);
 irqMask =read_eeprom(ioaddr,7, dev);
 i &=0x07;/* Mask off INT number */

for(j=0; ((j<16) && (i>=0)); j++) {
if((irqMask & (1<<j))!=0) {
if(i==0) {
 dev->irq = j;
break;/* found bit corresponding to irq */
}
 i--;/* count bits set in irqMask */
}
}
if(dev->irq <2) {
printk(" Duh! illegal interrupt vector stored in EEPROM.\n");
return-ENODEV;
}else

if(dev->irq==2)
 dev->irq =9;
}

if(dev->irq >2) {
printk(", IRQ %d, %s.\n", dev->irq,
 ifmap[dev->if_port]);
}
elseprintk(", %s.\n", ifmap[dev->if_port]);

if((dev->mem_start &0xf) >0)/* I don't know if this is */
 net_debug = dev->mem_start &7;/* still useful or not */

if(net_debug >3) {
 i =read_eeprom(ioaddr,5, dev);
if(i &0x2000)/* bit 13 of EEPROM word 5 */
printk(KERN_DEBUG "%s: Concurrent Processing is enabled but not used!\n",
 dev->name);
}

if(net_debug)
printk(version);

/* Grab the region so we can find another board if autoIRQ fails. */
request_region(ioaddr, EEPRO_IO_EXTENT, dev->name);

((struct eepro_local *)dev->priv)->lock = SPIN_LOCK_UNLOCKED;

 dev->open = eepro_open;
 dev->stop = eepro_close;
 dev->hard_start_xmit = eepro_send_packet;
 dev->get_stats = eepro_get_stats;
 dev->set_multicast_list = &set_multicast_list;
 dev->tx_timeout = eepro_tx_timeout;
 dev->watchdog_timeo = TX_TIMEOUT;

/* Fill in the fields of the device structure with
 ethernet generic values */

ether_setup(dev);

/* Check the station address for the manufacturer's code */
if(net_debug>3)
printEEPROMInfo(ioaddr, dev);

/* RESET the 82595 */
eepro_reset(ioaddr);

return0;
}
else return-ENODEV;
}
else if(net_debug >3)
printk("EtherExpress Pro probed failed!\n");
return-ENODEV;
}

/* Open/initialize the board. This is called (in the current kernel)
 sometime after booting when the 'ifconfig' program is run.

 This routine should set everything up anew at each open, even
 registers that "should" only need to be set once at boot, so that
 there is non-reboot way to recover if something goes wrong.
 */

static char irqrmap[] = {-1,-1,0,1,-1,2,-1,-1,-1,0,3,4,-1,-1,-1,-1};
static char irqrmap2[] = {-1,-1,4,0,1,2,-1,3,-1,4,5,6,7,-1,-1,-1};
static inteepro_grab_irq(struct net_device *dev)
{
int irqlist[] = {3,4,5,7,9,10,11,12,0};
int*irqp = irqlist, temp_reg, ioaddr = dev->base_addr;

eepro_sw2bank1(ioaddr);/* be CAREFUL, BANK 1 now */

/* Enable the interrupt line. */
eepro_en_intline(ioaddr);

/* be CAREFUL, BANK 0 now */
eepro_sw2bank0(ioaddr);

/* clear all interrupts */
eepro_clear_int(ioaddr);

/* Let EXEC event to interrupt */
eepro_en_intexec(ioaddr);

do{
eepro_sw2bank1(ioaddr);/* be CAREFUL, BANK 1 now */

 temp_reg =inb(ioaddr + INT_NO_REG);
outb((temp_reg &0xf8) | irqrmap[*irqp], ioaddr + INT_NO_REG);

eepro_sw2bank0(ioaddr);/* Switch back to Bank 0 */

if(request_irq(*irqp, NULL,0,"bogus", dev) != EBUSY) {
/* Twinkle the interrupt, and check if it's seen */
autoirq_setup(0);

eepro_diag(ioaddr);/* RESET the 82595 */

if(*irqp ==autoirq_report(2))/* It's a good IRQ line */
break;

/* clear all interrupts */
eepro_clear_int(ioaddr);
}
}while(*++irqp);

eepro_sw2bank1(ioaddr);/* Switch back to Bank 1 */

/* Disable the physical interrupt line. */
eepro_dis_intline(ioaddr);

eepro_sw2bank0(ioaddr);/* Switch back to Bank 0 */

/* Mask all the interrupts. */
eepro_dis_int(ioaddr);

/* clear all interrupts */
eepro_clear_int(ioaddr);

return dev->irq;
}

static inteepro_open(struct net_device *dev)
{
unsigned short temp_reg, old8, old9;
int irqMask;
int i, ioaddr = dev->base_addr;
struct eepro_local *lp = (struct eepro_local *)dev->priv;

if(net_debug >3)
printk(KERN_DEBUG "%s: entering eepro_open routine.\n", dev->name);

 irqMask =read_eeprom(ioaddr,7,dev);

if(lp->eepro == LAN595FX_10ISA) {
if(net_debug >3)printk(KERN_DEBUG "p->eepro = 3;\n");
}
else if(irqMask == ee_FX_INT2IRQ)/* INT to IRQ Mask */
{
 lp->eepro =2;/* Yes, an Intel EtherExpress Pro/10+ */
if(net_debug >3)printk(KERN_DEBUG "p->eepro = 2;\n");
}

else if((dev->dev_addr[0] == SA_ADDR0 &&
 dev->dev_addr[1] == SA_ADDR1 &&
 dev->dev_addr[2] == SA_ADDR2))
{
 lp->eepro =1;
if(net_debug >3)printk(KERN_DEBUG "p->eepro = 1;\n");
}/* Yes, an Intel EtherExpress Pro/10 */

else lp->eepro =0;/* No, it is a generic 82585 lan card */

/* Get the interrupt vector for the 82595 */
if(dev->irq <2&&eepro_grab_irq(dev) ==0) {
printk("%s: unable to get IRQ %d.\n", dev->name, dev->irq);
return-EAGAIN;
}

if(request_irq(dev->irq , &eepro_interrupt,0, dev->name, dev)) {
printk("%s: unable to get IRQ %d.\n", dev->name, dev->irq);
return-EAGAIN;
}

#ifdef irq2dev_map
if(((irq2dev_map[dev->irq] !=0)
|| (irq2dev_map[dev->irq] = dev) ==0) &&
(irq2dev_map[dev->irq]!=dev)) {
/* printk("%s: IRQ map wrong\n", dev->name); */
return-EAGAIN;
}
#endif

/* Initialize the 82595. */

eepro_sw2bank2(ioaddr);/* be CAREFUL, BANK 2 now */
 temp_reg =inb(ioaddr + eeprom_reg);

 lp->stepping = temp_reg >>5;/* Get the stepping number of the 595 */

if(net_debug >3)
printk(KERN_DEBUG "The stepping of the 82595 is %d\n", lp->stepping);

if(temp_reg &0x10)/* Check the TurnOff Enable bit */
outb(temp_reg &0xef, ioaddr + eeprom_reg);
for(i=0; i <6; i++)
outb(dev->dev_addr[i] , ioaddr + I_ADD_REG0 + i);

 temp_reg =inb(ioaddr + REG1);/* Setup Transmit Chaining */
outb(temp_reg | XMT_Chain_Int | XMT_Chain_ErrStop /* and discard bad RCV frames */
| RCV_Discard_BadFrame, ioaddr + REG1);

 temp_reg =inb(ioaddr + REG2);/* Match broadcast */
outb(temp_reg |0x14, ioaddr + REG2);

 temp_reg =inb(ioaddr + REG3);
outb(temp_reg &0x3f, ioaddr + REG3);/* clear test mode */

/* Set the receiving mode */
eepro_sw2bank1(ioaddr);/* be CAREFUL, BANK 1 now */

/* Set the interrupt vector */
 temp_reg =inb(ioaddr + INT_NO_REG);
if(lp->eepro ==2|| lp->eepro == LAN595FX_10ISA)
outb((temp_reg &0xf8) | irqrmap2[dev->irq], ioaddr + INT_NO_REG);
elseoutb((temp_reg &0xf8) | irqrmap[dev->irq], ioaddr + INT_NO_REG);


 temp_reg =inb(ioaddr + INT_NO_REG);
if(lp->eepro ==2|| lp->eepro == LAN595FX_10ISA)
outb((temp_reg &0xf0) | irqrmap2[dev->irq] |0x08,ioaddr+INT_NO_REG);
elseoutb((temp_reg &0xf8) | irqrmap[dev->irq], ioaddr + INT_NO_REG);

if(net_debug >3)
printk(KERN_DEBUG "eepro_open: content of INT Reg is %x\n", temp_reg);


/* Initialize the RCV and XMT upper and lower limits */
outb(RCV_LOWER_LIMIT, ioaddr + RCV_LOWER_LIMIT_REG);
outb(RCV_UPPER_LIMIT, ioaddr + RCV_UPPER_LIMIT_REG);
outb(XMT_LOWER_LIMIT, ioaddr + xmt_lower_limit_reg);
outb(XMT_UPPER_LIMIT, ioaddr + xmt_upper_limit_reg);

/* Enable the interrupt line. */
eepro_en_intline(ioaddr);

/* Switch back to Bank 0 */
eepro_sw2bank0(ioaddr);

/* Let RX and TX events to interrupt */
eepro_en_int(ioaddr);

/* clear all interrupts */
eepro_clear_int(ioaddr);

/* Initialize RCV */
outw(RCV_LOWER_LIMIT <<8, ioaddr + RCV_BAR);
 lp->rx_start = (RCV_LOWER_LIMIT <<8) ;
outw((RCV_UPPER_LIMIT <<8) |0xfe, ioaddr + RCV_STOP);

/* Initialize XMT */
outw(XMT_LOWER_LIMIT <<8, ioaddr + xmt_bar);

/* Check for the i82595TX and i82595FX */
 old8 =inb(ioaddr +8);
outb(~old8, ioaddr +8);

if((temp_reg =inb(ioaddr +8)) == old8) {
if(net_debug >3)
printk(KERN_DEBUG "i82595 detected!\n");
 lp->version = LAN595;
}
else{
 lp->version = LAN595TX;
outb(old8, ioaddr +8);
 old9 =inb(ioaddr +9);
/*outb(~old9, ioaddr + 9);
 if (((temp_reg = inb(ioaddr + 9)) == ( (~old9)&0xff) )) {*/

if(irqMask==ee_FX_INT2IRQ) {
enum iftype { AUI=0, BNC=1, TPE=2};

if(net_debug >3) {
printk(KERN_DEBUG "IrqMask: %#x\n",irqMask);
printk(KERN_DEBUG "i82595FX detected!\n");
}
 lp->version = LAN595FX;
outb(old9, ioaddr +9);
if(dev->if_port != TPE) {/* Hopefully, this will fix the
 problem of using Pentiums and
 pro/10 w/ BNC. */
eepro_sw2bank2(ioaddr);/* be CAREFUL, BANK 2 now */
 temp_reg =inb(ioaddr + REG13);
/* disable the full duplex mode since it is not
 applicable with the 10Base2 cable. */
outb(temp_reg & ~(FDX | A_N_ENABLE), REG13);
eepro_sw2bank0(ioaddr);/* be CAREFUL, BANK 0 now */
}
}
else if(net_debug >3) {
printk(KERN_DEBUG "temp_reg: %#x ~old9: %#x\n",temp_reg,((~old9)&0xff));
printk(KERN_DEBUG "i82595TX detected!\n");
}
}

eepro_sel_reset(ioaddr);

 lp->tx_start = lp->tx_end = XMT_LOWER_LIMIT <<8;
 lp->tx_last =0;

netif_start_queue(dev);

if(net_debug >3)
printk(KERN_DEBUG "%s: exiting eepro_open routine.\n", dev->name);

/* enabling rx */
eepro_en_rx(ioaddr);

return0;
}

static voideepro_tx_timeout(struct net_device *dev)
{
struct eepro_local *lp = (struct eepro_local *) dev->priv;
int ioaddr = dev->base_addr;

/* if (net_debug > 1) */
printk(KERN_ERR "%s: transmit timed out, %s?\n", dev->name,
"network cable problem");
/* This is not a duplicate. One message for the console, 
 one for the the log file */
printk(KERN_DEBUG "%s: transmit timed out, %s?\n", dev->name,
"network cable problem");
eepro_complete_selreset(ioaddr);
}


static inteepro_send_packet(struct sk_buff *skb,struct net_device *dev)
{
struct eepro_local *lp = (struct eepro_local *)dev->priv;
unsigned long flags;

if(net_debug >5)
printk(KERN_DEBUG "%s: entering eepro_send_packet routine.\n", dev->name);

netif_stop_queue(dev);

spin_lock_irqsave(&lp->lock, flags);

{
short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
unsigned char*buf = skb->data;

 lp->stats.tx_bytes+=skb->len;

hardware_send_packet(dev, buf, length);

 dev->trans_start = jiffies;

}

dev_kfree_skb(skb);

/* You might need to clean up and record Tx statistics here. */
/* lp->stats.tx_aborted_errors++; */

if(net_debug >5)
printk(KERN_DEBUG "%s: exiting eepro_send_packet routine.\n", dev->name);

spin_unlock_irqrestore(&lp->lock, flags);

return0;
}


/* The typical workload of the driver:
 Handle the network interface interrupts. */

static void
eepro_interrupt(int irq,void*dev_id,struct pt_regs * regs)
{
struct net_device *dev = (struct net_device *)dev_id;
/* (struct net_device *)(irq2dev_map[irq]);*/
struct eepro_local *lp = (struct eepro_local *)dev->priv;
int ioaddr, status, boguscount =20;

if(dev == NULL) {
printk(KERN_ERR "eepro_interrupt(): irq %d for unknown device.\\n", irq);
return;
}

spin_lock(&lp->lock);

if(net_debug >5)
printk(KERN_DEBUG "%s: entering eepro_interrupt routine.\n", dev->name);

 ioaddr = dev->base_addr;

while(((status =inb(ioaddr + STATUS_REG)) &0x06) && (boguscount--))
{
switch(status & (RX_INT | TX_INT)) {
case(RX_INT | TX_INT):
eepro_ack_rxtx(ioaddr);
break;
case RX_INT:
eepro_ack_rx(ioaddr);
break;
case TX_INT:
eepro_ack_tx(ioaddr);
break;
}
if(status & RX_INT) {
if(net_debug >4)
printk(KERN_DEBUG "%s: packet received interrupt.\n", dev->name);

/* Get the received packets */
eepro_rx(dev);
}
if(status & TX_INT) {
if(net_debug >4)
printk(KERN_DEBUG "%s: packet transmit interrupt.\n", dev->name);

/* Process the status of transmitted packets */
eepro_transmit_interrupt(dev);
}
}

if(net_debug >5)
printk(KERN_DEBUG "%s: exiting eepro_interrupt routine.\n", dev->name);

spin_unlock(&lp->lock);
return;
}

static inteepro_close(struct net_device *dev)
{
struct eepro_local *lp = (struct eepro_local *)dev->priv;
int ioaddr = dev->base_addr;
short temp_reg;

netif_stop_queue(dev);

eepro_sw2bank1(ioaddr);/* Switch back to Bank 1 */

/* Disable the physical interrupt line. */
 temp_reg =inb(ioaddr + REG1);
outb(temp_reg &0x7f, ioaddr + REG1);

eepro_sw2bank0(ioaddr);/* Switch back to Bank 0 */

/* Flush the Tx and disable Rx. */
outb(STOP_RCV_CMD, ioaddr);
 lp->tx_start = lp->tx_end = (XMT_LOWER_LIMIT <<8);
 lp->tx_last =0;

/* Mask all the interrupts. */
eepro_dis_int(ioaddr);

/* clear all interrupts */
eepro_clear_int(ioaddr);

/* Reset the 82595 */
eepro_reset(ioaddr);

/* release the interrupt */
free_irq(dev->irq, dev);

#ifdef irq2dev_map
 irq2dev_map[dev->irq] =0;
#endif

/* Update the statistics here. What statistics? */

return0;
}

/* Get the current statistics. This may be called with the card open or
 closed. */
static struct net_device_stats *
eepro_get_stats(struct net_device *dev)
{
struct eepro_local *lp = (struct eepro_local *)dev->priv;

return&lp->stats;
}

/* Set or clear the multicast filter for this adaptor.
 */
static void
set_multicast_list(struct net_device *dev)
{
struct eepro_local *lp = (struct eepro_local *)dev->priv;
short ioaddr = dev->base_addr;
unsigned short mode;
struct dev_mc_list *dmi=dev->mc_list;

if(dev->flags&(IFF_ALLMULTI|IFF_PROMISC) || dev->mc_count >63)
{
/*
 * We must make the kernel realise we had to move
 * into promisc mode or we start all out war on
 * the cable. If it was a promisc request the
 * flag is already set. If not we assert it.
 */
 dev->flags|=IFF_PROMISC;

eepro_sw2bank2(ioaddr);/* be CAREFUL, BANK 2 now */
 mode =inb(ioaddr + REG2);
outb(mode | PRMSC_Mode, ioaddr + REG2);
 mode =inb(ioaddr + REG3);
outb(mode, ioaddr + REG3);/* writing reg. 3 to complete the update */
eepro_sw2bank0(ioaddr);/* Return to BANK 0 now */
printk("%s: promiscuous mode enabled.\n", dev->name);
}

else if(dev->mc_count==0)
{
eepro_sw2bank2(ioaddr);/* be CAREFUL, BANK 2 now */
 mode =inb(ioaddr + REG2);
outb(mode &0xd6, ioaddr + REG2);/* Turn off Multi-IA and PRMSC_Mode bits */
 mode =inb(ioaddr + REG3);
outb(mode, ioaddr + REG3);/* writing reg. 3 to complete the update */
eepro_sw2bank0(ioaddr);/* Return to BANK 0 now */
}

else
{
unsigned short status, *eaddrs;
int i, boguscount =0;

/* Disable RX and TX interrupts. Necessary to avoid
 corruption of the HOST_ADDRESS_REG by interrupt
 service routines. */
eepro_dis_int(ioaddr);

eepro_sw2bank2(ioaddr);/* be CAREFUL, BANK 2 now */
 mode =inb(ioaddr + REG2);
outb(mode | Multi_IA, ioaddr + REG2);
 mode =inb(ioaddr + REG3);
outb(mode, ioaddr + REG3);/* writing reg. 3 to complete the update */
eepro_sw2bank0(ioaddr);/* Return to BANK 0 now */
outw(lp->tx_end, ioaddr + HOST_ADDRESS_REG);
outw(MC_SETUP, ioaddr + IO_PORT);
outw(0, ioaddr + IO_PORT);
outw(0, ioaddr + IO_PORT);
outw(6*(dev->mc_count +1), ioaddr + IO_PORT);

for(i =0; i < dev->mc_count; i++)
{
 eaddrs=(unsigned short*)dmi->dmi_addr;
 dmi=dmi->next;
outw(*eaddrs++, ioaddr + IO_PORT);
outw(*eaddrs++, ioaddr + IO_PORT);
outw(*eaddrs++, ioaddr + IO_PORT);
}

 eaddrs = (unsigned short*) dev->dev_addr;
outw(eaddrs[0], ioaddr + IO_PORT);
outw(eaddrs[1], ioaddr + IO_PORT);
outw(eaddrs[2], ioaddr + IO_PORT);
outw(lp->tx_end, ioaddr + xmt_bar);
outb(MC_SETUP, ioaddr);

/* Update the transmit queue */
 i = lp->tx_end + XMT_HEADER +6*(dev->mc_count +1);

if(lp->tx_start != lp->tx_end)
{
/* update the next address and the chain bit in the 
 last packet */
outw(lp->tx_last + XMT_CHAIN, ioaddr + HOST_ADDRESS_REG);
outw(i, ioaddr + IO_PORT);
outw(lp->tx_last + XMT_COUNT, ioaddr + HOST_ADDRESS_REG);
 status =inw(ioaddr + IO_PORT);
outw(status | CHAIN_BIT, ioaddr + IO_PORT);
 lp->tx_end = i ;
}
else{
 lp->tx_start = lp->tx_end = i ;
}

/* Acknowledge that the MC setup is done */
do{/* We should be doing this in the eepro_interrupt()! */
 SLOW_DOWN;
 SLOW_DOWN;
if(inb(ioaddr + STATUS_REG) &0x08)
{
 i =inb(ioaddr);
outb(0x08, ioaddr + STATUS_REG);

if(i &0x20) {/* command ABORTed */
printk("%s: multicast setup failed.\n",
 dev->name);
break;
}else if((i &0x0f) ==0x03) {/* MC-Done */
printk("%s: set Rx mode to %d address%s.\n",
 dev->name, dev->mc_count,
 dev->mc_count >1?"es":"");
break;
}
}
}while(++boguscount <100);

/* Re-enable RX and TX interrupts */
eepro_en_int(ioaddr);
}
eepro_complete_selreset(ioaddr);
}

/* The horrible routine to read a word from the serial EEPROM. */
/* IMPORTANT - the 82595 will be set to Bank 0 after the eeprom is read */

/* The delay between EEPROM clock transitions. */
#define eeprom_delay() { udelay(40); }
#define EE_READ_CMD (6 << 6)

int
read_eeprom(int ioaddr,int location,struct net_device *dev)
{
int i;
unsigned short retval =0;
short ee_addr = ioaddr + eeprom_reg;
struct eepro_local *lp = (struct eepro_local *)dev->priv;
int read_cmd = location | EE_READ_CMD;
short ctrl_val = EECS ;

/* XXXX - this is not the final version. We must test this on other
 * boards other than eepro10. I think that it won't let other
 * boards to fail. (aris)
 */
if(lp->eepro == LAN595FX_10ISA) {
eepro_sw2bank1(ioaddr);
outb(0x00, ioaddr + STATUS_REG);
}

eepro_sw2bank2(ioaddr);
outb(ctrl_val, ee_addr);

/* Shift the read command bits out. */
for(i =8; i >=0; i--) {
short outval = (read_cmd & (1<< i)) ? ctrl_val | EEDI
: ctrl_val;
outb(outval, ee_addr);
outb(outval | EESK, ee_addr);/* EEPROM clock tick. */
eeprom_delay();
outb(outval, ee_addr);/* Finish EEPROM a clock tick. */
eeprom_delay();
}
outb(ctrl_val, ee_addr);

for(i =16; i >0; i--) {
outb(ctrl_val | EESK, ee_addr);eeprom_delay();
 retval = (retval <<1) | ((inb(ee_addr) & EEDO) ?1:0);
outb(ctrl_val, ee_addr);eeprom_delay();
}

/* Terminate the EEPROM access. */
 ctrl_val &= ~EECS;
outb(ctrl_val | EESK, ee_addr);
eeprom_delay();
outb(ctrl_val, ee_addr);
eeprom_delay();
eepro_sw2bank0(ioaddr);
return retval;
}

static void
hardware_send_packet(struct net_device *dev,void*buf,short length)
{
struct eepro_local *lp = (struct eepro_local *)dev->priv;
short ioaddr = dev->base_addr;
unsigned status, tx_available, last, end, boguscount =100;

if(net_debug >5)
printk(KERN_DEBUG "%s: entering hardware_send_packet routine.\n", dev->name);

while(boguscount-- >0) {

/* Disable RX and TX interrupts. Necessary to avoid
 corruption of the HOST_ADDRESS_REG by interrupt
 service routines. */
eepro_dis_int(ioaddr);

/* determine how much of the transmit buffer space is available */
if(lp->tx_end > lp->tx_start)
 tx_available = XMT_RAM - (lp->tx_end - lp->tx_start);
else if(lp->tx_end < lp->tx_start)
 tx_available = lp->tx_start - lp->tx_end;
else tx_available = XMT_RAM;

if(((((length +3) >>1) <<1) +2*XMT_HEADER)
>= tx_available)/* No space available ??? */
{
eepro_transmit_interrupt(dev);/* Clean up the transmiting queue */

/* Enable RX and TX interrupts */
eepro_en_int(ioaddr);
continue;
}

 last = lp->tx_end;
 end = last + (((length +3) >>1) <<1) + XMT_HEADER;

if(end >= (XMT_UPPER_LIMIT <<8)) {/* the transmit buffer is wrapped around */
if(((XMT_UPPER_LIMIT <<8) - last) <= XMT_HEADER) {
/* Arrrr!!!, must keep the xmt header together,
 several days were lost to chase this one down. */

 last = (XMT_LOWER_LIMIT <<8);
 end = last + (((length +3) >>1) <<1) + XMT_HEADER;
}

else end = (XMT_LOWER_LIMIT <<8) + (end -
(XMT_UPPER_LIMIT <<8));
}
outw(last, ioaddr + HOST_ADDRESS_REG);
outw(XMT_CMD, ioaddr + IO_PORT);
outw(0, ioaddr + IO_PORT);
outw(end, ioaddr + IO_PORT);
outw(length, ioaddr + IO_PORT);

if(lp->version == LAN595)
outsw(ioaddr + IO_PORT, buf, (length +3) >>1);
else{/* LAN595TX or LAN595FX, capable of 32-bit I/O processing */
unsigned short temp =inb(ioaddr + INT_MASK_REG);
outb(temp | IO_32_BIT, ioaddr + INT_MASK_REG);
outsl(ioaddr + IO_PORT_32_BIT, buf, (length +3) >>2);
outb(temp & ~(IO_32_BIT), ioaddr + INT_MASK_REG);
}

/* A dummy read to flush the DRAM write pipeline */
 status =inw(ioaddr + IO_PORT);

if(lp->tx_start == lp->tx_end) {
outw(last, ioaddr + xmt_bar);
outb(XMT_CMD, ioaddr);
 lp->tx_start = last;/* I don't like to change tx_start here */
}
else{
/* update the next address and the chain bit in the 
 last packet */

if(lp->tx_end != last) {
outw(lp->tx_last + XMT_CHAIN, ioaddr + HOST_ADDRESS_REG);
outw(last, ioaddr + IO_PORT);
}

outw(lp->tx_last + XMT_COUNT, ioaddr + HOST_ADDRESS_REG);
 status =inw(ioaddr + IO_PORT);
outw(status | CHAIN_BIT, ioaddr + IO_PORT);

/* Continue the transmit command */
outb(RESUME_XMT_CMD, ioaddr);
}

 lp->tx_last = last;
 lp->tx_end = end;

if(netif_queue_stopped(dev))
netif_wake_queue(dev);

/* now we are serializing tx. queue won't come back until
 * the tx interrupt
 */
if(lp->eepro == LAN595FX_10ISA)
netif_stop_queue(dev);

/* Enable RX and TX interrupts */
eepro_en_int(ioaddr);

if(net_debug >5)
printk(KERN_DEBUG "%s: exiting hardware_send_packet routine.\n", dev->name);
return;
}
netif_stop_queue(dev);
if(net_debug >5)
printk(KERN_DEBUG "%s: exiting hardware_send_packet routine.\n", dev->name);
}

static void
eepro_rx(struct net_device *dev)
{
struct eepro_local *lp = (struct eepro_local *)dev->priv;
short ioaddr = dev->base_addr;
short boguscount =20;
unsigned rcv_car = lp->rx_start;
unsigned rcv_event, rcv_status, rcv_next_frame, rcv_size;

if(net_debug >5)
printk(KERN_DEBUG "%s: entering eepro_rx routine.\n", dev->name);

/* Set the read pointer to the start of the RCV */
outw(rcv_car, ioaddr + HOST_ADDRESS_REG);

 rcv_event =inw(ioaddr + IO_PORT);

while(rcv_event == RCV_DONE) {

 rcv_status =inw(ioaddr + IO_PORT);
 rcv_next_frame =inw(ioaddr + IO_PORT);
 rcv_size =inw(ioaddr + IO_PORT);

if((rcv_status & (RX_OK | RX_ERROR)) == RX_OK) {

/* Malloc up new buffer. */
struct sk_buff *skb;

 lp->stats.rx_bytes+=rcv_size;
 rcv_size &=0x3fff;
 skb =dev_alloc_skb(rcv_size+5);
if(skb == NULL) {
printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
 lp->stats.rx_dropped++;
break;
}
 skb->dev = dev;
skb_reserve(skb,2);

if(lp->version == LAN595)
insw(ioaddr+IO_PORT,skb_put(skb,rcv_size), (rcv_size +3) >>1);
else{/* LAN595TX or LAN595FX, capable of 32-bit I/O processing */
unsigned short temp =inb(ioaddr + INT_MASK_REG);
outb(temp | IO_32_BIT, ioaddr + INT_MASK_REG);
insl(ioaddr+IO_PORT_32_BIT,skb_put(skb,rcv_size),
(rcv_size +3) >>2);
outb(temp & ~(IO_32_BIT), ioaddr + INT_MASK_REG);
}

 skb->protocol =eth_type_trans(skb,dev);
netif_rx(skb);
 lp->stats.rx_packets++;
}

else{/* Not sure will ever reach here, 
 I set the 595 to discard bad received frames */
 lp->stats.rx_errors++;

if(rcv_status &0x0100)
 lp->stats.rx_over_errors++;

else if(rcv_status &0x0400)
 lp->stats.rx_frame_errors++;

else if(rcv_status &0x0800)
 lp->stats.rx_crc_errors++;

printk("%s: event = %#x, status = %#x, next = %#x, size = %#x\n",
 dev->name, rcv_event, rcv_status, rcv_next_frame, rcv_size);
}

if(rcv_status &0x1000)
 lp->stats.rx_length_errors++;

if(--boguscount ==0)
break;

 rcv_car = lp->rx_start + RCV_HEADER + rcv_size;
 lp->rx_start = rcv_next_frame;
outw(rcv_next_frame, ioaddr + HOST_ADDRESS_REG);
 rcv_event =inw(ioaddr + IO_PORT);

}
if(rcv_car ==0)
 rcv_car = (RCV_UPPER_LIMIT <<8) |0xff;

outw(rcv_car -1, ioaddr + RCV_STOP);

if(net_debug >5)
printk(KERN_DEBUG "%s: exiting eepro_rx routine.\n", dev->name);
}

static void
eepro_transmit_interrupt(struct net_device *dev)
{
struct eepro_local *lp = (struct eepro_local *)dev->priv;
short ioaddr = dev->base_addr;
short boguscount =20;
unsigned xmt_status;

/*
 if (dev->tbusy == 0) {
 printk("%s: transmit_interrupt called with tbusy = 0 ??\n",
 dev->name);
 printk(KERN_DEBUG "%s: transmit_interrupt called with tbusy = 0 ??\n",
 dev->name);
 }
 */
while(lp->tx_start != lp->tx_end && boguscount) {

outw(lp->tx_start, ioaddr + HOST_ADDRESS_REG);
 xmt_status =inw(ioaddr+IO_PORT);

if((xmt_status & TX_DONE_BIT) ==0) {
udelay(40);
 boguscount--;
continue;
}

 xmt_status =inw(ioaddr+IO_PORT);
 lp->tx_start =inw(ioaddr+IO_PORT);

if(lp->eepro == LAN595FX_10ISA) {
 lp->tx_start = (XMT_LOWER_LIMIT <<8);
 lp->tx_end = lp->tx_start;

/* yeah, black magic :( */
eepro_sw2bank0(ioaddr);
eepro_en_int(ioaddr);

/* disabling rx */
eepro_dis_rx(ioaddr);

/* enabling rx */
eepro_en_rx(ioaddr);
}

netif_wake_queue(dev);

if(xmt_status &0x2000)
 lp->stats.tx_packets++;
else{
 lp->stats.tx_errors++;
if(xmt_status &0x0400) {
 lp->stats.tx_carrier_errors++;
printk(KERN_DEBUG "%s: carrier error\n",
 dev->name);
printk(KERN_DEBUG "%s: XMT status = %#x\n",
 dev->name, xmt_status);
}
else{
printk(KERN_DEBUG "%s: XMT status = %#x\n",
 dev->name, xmt_status);
printk(KERN_DEBUG "%s: XMT status = %#x\n",
 dev->name, xmt_status);
}
if(lp->eepro == LAN595FX_10ISA) {
/* Try to restart the adaptor. */
/* We are supposed to wait for 2 us after a SEL_RESET */
eepro_sel_reset(ioaddr);

/* first enable interrupts */
eepro_sw2bank0(ioaddr);
outb(ALL_MASK & ~(RX_INT | TX_INT), ioaddr + STATUS_REG);

/* enabling rx */
eepro_en_rx(ioaddr);
}
}
if(xmt_status &0x000f) {
 lp->stats.collisions += (xmt_status &0x000f);
}

if((xmt_status &0x0040) ==0x0) {
 lp->stats.tx_heartbeat_errors++;
}

 boguscount--;
}
/* if it reached here then it's probable that the adapter won't
 * interrupt again for tx. in other words: tx timeout what will take
 * a lot of time to happen, so we'll do a complete selreset.
 */
if(!boguscount)
eepro_complete_selreset(ioaddr);
}

#define MAX_EEPRO 8
static struct net_device dev_eepro[MAX_EEPRO];

static int io[MAX_EEPRO];
static int irq[MAX_EEPRO];
static int mem[MAX_EEPRO] = {/* Size of the rx buffer in KB */
[0... MAX_EEPRO-1] = RCV_DEFAULT_RAM/1024
};
static int autodetect;

static int n_eepro =0;
/* For linux 2.1.xx */

MODULE_AUTHOR("Pascal Dupuis <dupuis@lei.ucl.ac.be> for the 2.1 stuff (locking,...)");
MODULE_DESCRIPTION("Intel i82595 ISA EtherExpressPro10/10+ driver");
MODULE_PARM(io,"1-"__MODULE_STRING(MAX_EEPRO)"i");
MODULE_PARM(irq,"1-"__MODULE_STRING(MAX_EEPRO)"i");
MODULE_PARM(mem,"1-"__MODULE_STRING(MAX_EEPRO)"i");
MODULE_PARM(autodetect,"1-"__MODULE_STRING(1)"i");

#ifdef MODULE

int
init_module(void)
{
int i;
if(io[0] ==0&& autodetect ==0) {
printk("eepro_init_module: Probe is very dangerous in ISA boards!\n");
printk("eepro_init_module: Please add\"autodetect=1\"to force probe\n");
return1;
}
else if(autodetect) {
/* if autodetect is set then we must force detection */
 io[0] =0;

printk("eepro_init_module: Auto-detecting boards (May God protect us...)\n");
}

for(i =0; i < MAX_EEPRO; i++) {
struct net_device *d = &dev_eepro[n_eepro];
 d->mem_end = mem[n_eepro];
 d->base_addr = io[0];
 d->irq = irq[n_eepro];
 d->init = eepro_probe;

if(register_netdev(d) ==0)
 n_eepro++;
else
break;
}

return n_eepro ?0: -ENODEV;
}

void
cleanup_module(void)
{
int i;

for(i=0; i<n_eepro; i++) {
struct net_device *d = &dev_eepro[i];
unregister_netdev(d);

kfree(d->priv);
 d->priv=NULL;

/* If we don't do this, we can't re-insmod it later. */
release_region(d->base_addr, EEPRO_IO_EXTENT);

}
}
#endif/* MODULE */