Subversion Repositories planix.SVN

#include "u.h"

#include "../port/lib.h"

#include "mem.h"

#include "dat.h"

#include "fns.h"

#include "io.h"

#include "../port/error.h"

#include "../port/netif.h"

#include "etherif.h"

#include "ether8390.h"

/*

 * Western Digital/Standard Microsystems Corporation cards (WD80[01]3).

 * Also handles 8216 cards (Elite Ultra).

 * Configuration code based on that provided by SMC a long time ago.

 */

enum {					/* 83C584 Bus Interface Controller */

	Msr		= 0x00,		/* Memory Select Register */

	Icr		= 0x01,		/* Interface Configuration Register */

	Iar		= 0x02,		/* I/O Address Register */

	Bio		= 0x03,		/* BIOS ROM Address Register */

	Ear		= 0x03,		/* EEROM Address Register (shared with Bio) */

	Irr		= 0x04,		/* Interrupt Request Register */

	Hcr		= 0x04,		/* 8216 hardware control */

	Laar		= 0x05,		/* LA Address Register */

	Ijr		= 0x06,		/* Initialisation Jumpers */

	Gp2		= 0x07,		/* General Purpose Data Register */

	Lar		= 0x08,		/* LAN Address Registers */

	Id		= 0x0E,		/* Card ID byte */

	Cksum		= 0x0F,		/* Checksum */

};

enum {					/* Msr */

	Rst		= 0x80,		/* software reset */

	Menb		= 0x40,		/* memory enable */

};

enum {					/* Icr */

	Bit16		= 0x01,		/* 16-bit bus */

	Other		= 0x02,		/* other register access */

	Ir2		= 0x04,		/* IR2 */

	Msz		= 0x08,		/* SRAM size */

	Rla		= 0x10,		/* recall LAN address */

	Rx7		= 0x20,		/* recall all but I/O and LAN address */

	Rio		= 0x40,		/* recall I/O address from EEROM */

	Sto		= 0x80,		/* non-volatile EEROM store */

};

enum {					/* Laar */

	ZeroWS16	= 0x20,		/* zero wait states for 16-bit ops */

	L16en		= 0x40,		/* enable 16-bit LAN operation */

	M16en		= 0x80,		/* enable 16-bit memory access */

};

enum {					/* Ijr */

	Ienable		= 0x01,		/* 8216 interrupt enable */

};

/*

 * Mapping from configuration bits to interrupt level.

 */

static int irq8003[8] = {

	9, 3, 5, 7, 10, 11, 15, 4,

};

static int irq8216[8] = {

	0, 9, 3, 5, 7, 10, 11, 15,

};

static void

reset8003(Ether* ether, uchar ea[Eaddrlen], uchar ic[8])

{

	Dp8390 *ctlr;

	ulong port;

	ctlr = ether->ctlr;

	port = ether->port;

	/*

	 * Check for old, dumb 8003E, which doesn't have an interface

	 * chip. Only Msr exists out of the 1st eight registers, reads

	 * of the others just alias the 2nd eight registers, the LAN

	 * address ROM. Can check Icr, Irr and Laar against the ethernet

	 * address read above and if they match it's an 8003E (or an

	 * 8003EBT, 8003S, 8003SH or 8003WT, doesn't matter), in which

	 * case the default irq gets used.

	 */

	if(memcmp(&ea[1], &ic[1], 5) == 0){

		memset(ic, 0, sizeof(ic));

		ic[Msr] = (((ulong)ether->mem)>>13) & 0x3F;

	}

	else{

		/*

		 * As a final sanity check for the 8013EBT, which doesn't have

		 * the 83C584 interface chip, but has 2 real registers, write Gp2

		 * and if it reads back the same, it's not an 8013EBT.

		 */

		outb(port+Gp2, 0xAA);

		inb(port+Msr);				/* wiggle bus */

		if(inb(port+Gp2) != 0xAA){

			memset(ic, 0, sizeof(ic));

			ic[Msr] = (((ulong)ether->mem)>>13) & 0x3F;

		}

		else

			ether->irq = irq8003[((ic[Irr]>>5) & 0x3)|(ic[Icr] & 0x4)];

		/*

		 * Check if 16-bit card.

		 * If Bit16 is read/write, then it's an 8-bit card.

		 * If Bit16 is set, it's in a 16-bit slot.

		 */

		outb(port+Icr, ic[Icr]^Bit16);

		inb(port+Msr);				/* wiggle bus */

		if((inb(port+Icr) & Bit16) == (ic[Icr] & Bit16)){

			ctlr->width = 2;

			ic[Icr] &= ~Bit16;

		}

		outb(port+Icr, ic[Icr]);

		if(ctlr->width == 2 && (inb(port+Icr) & Bit16) == 0)

			ctlr->width = 1;

	}

	ether->mem = (ulong)KADDR((ic[Msr] & 0x3F)<<13);

	if(ctlr->width == 2)

		ether->mem |= (ic[Laar] & 0x1F)<<19;

	else

		ether->mem |= 0x80000;

	if(ic[Icr] & (1<<3))

		ether->size = 32*1024;

	if(ctlr->width == 2)

		ether->size <<= 1;

	/*

	 * Enable interface RAM, set interface width.

	 */

	outb(port+Msr, ic[Msr]|Menb);

	if(ctlr->width == 2)

		outb(port+Laar, ic[Laar]|L16en|M16en|ZeroWS16);

}

static void

reset8216(Ether* ether, uchar[8])

{

	uchar hcr, irq, x;

	ulong addr, port;

	Dp8390 *ctlr;

	ctlr = ether->ctlr;

	port = ether->port;

	ctlr->width = 2;

	/*

	 * Switch to the alternate register set and retrieve the memory

	 * and irq information.

	 */

	hcr = inb(port+Hcr);

	outb(port+Hcr, 0x80|hcr);

	addr = inb(port+0x0B) & 0xFF;

	irq = inb(port+0x0D);

	outb(port+Hcr, hcr);

	ether->mem = (ulong)KADDR(0xC0000+((((addr>>2) & 0x30)|(addr & 0x0F))<<13));

	ether->size = 8192*(1<<((addr>>4) & 0x03));

	ether->irq = irq8216[((irq>>4) & 0x04)|((irq>>2) & 0x03)];

	/*

	 * Enable interface RAM, set interface width, and enable interrupts.

	 */

	x = inb(port+Msr) & ~Rst;

	outb(port+Msr, Menb|x);

	x = inb(port+Laar);

	outb(port+Laar, M16en|x);

	outb(port+Ijr, Ienable);

}

/*

 * Get configuration parameters, enable memory.

 * There are opportunities here for buckets of code, try to resist.

 */

static int

reset(Ether* ether)

{

	int i;

	uchar ea[Eaddrlen], ic[8], id, nullea[Eaddrlen], sum;

	ulong port;

	Dp8390 *ctlr;

	/*

	 * Set up the software configuration.

	 * Use defaults for port, irq, mem and size if not specified.

	 * Defaults are set for the dumb 8003E which can't be

	 * autoconfigured.

	 */

	if(ether->port == 0)

		ether->port = 0x280;

	if(ether->irq == 0)

		ether->irq = 3;

	if(ether->mem == 0)

		ether->mem = 0xD0000;

	if(ether->size == 0)

		ether->size = 8*1024;

	if(ioalloc(ether->port, 0x20, 0, "wd8003") < 0)

		return -1;

	/*

	 * Look for the interface. Read the LAN address ROM

	 * and validate the checksum - the sum of all 8 bytes

	 * should be 0xFF.

	 * At the same time, get the (possible) interface chip

	 * registers, they'll be used later to check for aliasing.

	 */

	port = ether->port;

	sum = 0;

	for(i = 0; i < sizeof(ea); i++){

		ea[i] = inb(port+Lar+i);

		sum += ea[i];

		ic[i] = inb(port+i);

	}

	id = inb(port+Id);

	sum += id;

	sum += inb(port+Cksum);

	if(sum != 0xFF){

		iofree(ether->port);

		return -1;

	}

	ether->ctlr = malloc(sizeof(Dp8390));

	ctlr = ether->ctlr;

	if(ctlr == nil)

		error(Enomem);

	ctlr->ram = 1;

	if((id & 0xFE) == 0x2A)

		reset8216(ether, ic);

	else

		reset8003(ether, ea, ic);

	/*

	 * Set the DP8390 ring addresses.

	 */

	ctlr->port = port+0x10;

	ctlr->tstart = 0;

	ctlr->pstart = HOWMANY(sizeof(Etherpkt), Dp8390BufSz);

	ctlr->pstop = HOWMANY(ether->size, Dp8390BufSz);

	/*

	 * Finally, init the 8390, set the ethernet address

	 * and claim the memory used.

	 */

	dp8390reset(ether);

	memset(nullea, 0, Eaddrlen);

	if(memcmp(nullea, ether->ea, Eaddrlen) == 0){

		for(i = 0; i < sizeof(ether->ea); i++)

			ether->ea[i] = ea[i];

	}

	dp8390setea(ether);

	if(umbrwmalloc(PADDR(ether->mem), ether->size, 0) == 0)

		print("ether8003: warning - 0x%luX unavailable\n",

			PADDR(ether->mem));

	return 0;

}

void

ether8003link(void)

{

	addethercard("WD8003", reset);

}