1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 *    Lance ethernet driver for the MIPS processor based
   4 *      DECstation family
   5 *
   6 *
   7 *      adopted from sunlance.c by Richard van den Berg
   8 *
   9 *      Copyright (C) 2002, 2003, 2005, 2006  Maciej W. Rozycki
  10 *
  11 *      additional sources:
  12 *      - PMAD-AA TURBOchannel Ethernet Module Functional Specification,
  13 *        Revision 1.2
  14 *
  15 *      History:
  16 *
  17 *      v0.001: The kernel accepts the code and it shows the hardware address.
  18 *
  19 *      v0.002: Removed most sparc stuff, left only some module and dma stuff.
  20 *
  21 *      v0.003: Enhanced base address calculation from proposals by
  22 *              Harald Koerfgen and Thomas Riemer.
  23 *
  24 *      v0.004: lance-regs is pointing at the right addresses, added prom
  25 *              check. First start of address mapping and DMA.
  26 *
  27 *      v0.005: started to play around with LANCE-DMA. This driver will not
  28 *              work for non IOASIC lances. HK
  29 *
  30 *      v0.006: added pointer arrays to lance_private and setup routine for
  31 *              them in dec_lance_init. HK
  32 *
  33 *      v0.007: Big shit. The LANCE seems to use a different DMA mechanism to
  34 *              access the init block. This looks like one (short) word at a
  35 *              time, but the smallest amount the IOASIC can transfer is a
  36 *              (long) word. So we have a 2-2 padding here. Changed
  37 *              lance_init_block accordingly. The 16-16 padding for the buffers
  38 *              seems to be correct. HK
  39 *
  40 *      v0.008: mods to make PMAX_LANCE work. 01/09/1999 triemer
  41 *
  42 *      v0.009: Module support fixes, multiple interfaces support, various
  43 *              bits. macro
  44 *
  45 *      v0.010: Fixes for the PMAD mapping of the LANCE buffer and for the
  46 *              PMAX requirement to only use halfword accesses to the
  47 *              buffer. macro
  48 *
  49 *      v0.011: Converted the PMAD to the driver model. macro
  50 */
  51
  52#include <linux/crc32.h>
  53#include <linux/delay.h>
  54#include <linux/errno.h>
  55#include <linux/if_ether.h>
  56#include <linux/init.h>
  57#include <linux/kernel.h>
  58#include <linux/module.h>
  59#include <linux/netdevice.h>
  60#include <linux/etherdevice.h>
  61#include <linux/spinlock.h>
  62#include <linux/stddef.h>
  63#include <linux/string.h>
  64#include <linux/tc.h>
  65#include <linux/types.h>
  66
  67#include <asm/addrspace.h>
  68
  69#include <asm/dec/interrupts.h>
  70#include <asm/dec/ioasic.h>
  71#include <asm/dec/ioasic_addrs.h>
  72#include <asm/dec/kn01.h>
  73#include <asm/dec/machtype.h>
  74#include <asm/dec/system.h>
  75
  76static const char version[] =
  77"declance.c: v0.011 by Linux MIPS DECstation task force\n";
  78
  79MODULE_AUTHOR("Linux MIPS DECstation task force");
  80MODULE_DESCRIPTION("DEC LANCE (DECstation onboard, PMAD-xx) driver");
  81MODULE_LICENSE("GPL");
  82
  83#define __unused __attribute__ ((unused))
  84
  85/*
  86 * card types
  87 */
  88#define ASIC_LANCE 1
  89#define PMAD_LANCE 2
  90#define PMAX_LANCE 3
  91
  92
  93#define LE_CSR0 0
  94#define LE_CSR1 1
  95#define LE_CSR2 2
  96#define LE_CSR3 3
  97
  98#define LE_MO_PROM      0x8000	/* Enable promiscuous mode */
  99
 100#define	LE_C0_ERR	0x8000	/* Error: set if BAB, SQE, MISS or ME is set */
 101#define	LE_C0_BABL	0x4000	/* BAB:  Babble: tx timeout. */
 102#define	LE_C0_CERR	0x2000	/* SQE:  Signal quality error */
 103#define	LE_C0_MISS	0x1000	/* MISS: Missed a packet */
 104#define	LE_C0_MERR	0x0800	/* ME:   Memory error */
 105#define	LE_C0_RINT	0x0400	/* Received interrupt */
 106#define	LE_C0_TINT	0x0200	/* Transmitter Interrupt */
 107#define	LE_C0_IDON	0x0100	/* IFIN: Init finished. */
 108#define	LE_C0_INTR	0x0080	/* Interrupt or error */
 109#define	LE_C0_INEA	0x0040	/* Interrupt enable */
 110#define	LE_C0_RXON	0x0020	/* Receiver on */
 111#define	LE_C0_TXON	0x0010	/* Transmitter on */
 112#define	LE_C0_TDMD	0x0008	/* Transmitter demand */
 113#define	LE_C0_STOP	0x0004	/* Stop the card */
 114#define	LE_C0_STRT	0x0002	/* Start the card */
 115#define	LE_C0_INIT	0x0001	/* Init the card */
 116
 117#define	LE_C3_BSWP	0x4	/* SWAP */
 118#define	LE_C3_ACON	0x2	/* ALE Control */
 119#define	LE_C3_BCON	0x1	/* Byte control */
 120
 121/* Receive message descriptor 1 */
 122#define LE_R1_OWN	0x8000	/* Who owns the entry */
 123#define LE_R1_ERR	0x4000	/* Error: if FRA, OFL, CRC or BUF is set */
 124#define LE_R1_FRA	0x2000	/* FRA: Frame error */
 125#define LE_R1_OFL	0x1000	/* OFL: Frame overflow */
 126#define LE_R1_CRC	0x0800	/* CRC error */
 127#define LE_R1_BUF	0x0400	/* BUF: Buffer error */
 128#define LE_R1_SOP	0x0200	/* Start of packet */
 129#define LE_R1_EOP	0x0100	/* End of packet */
 130#define LE_R1_POK	0x0300	/* Packet is complete: SOP + EOP */
 131
 132/* Transmit message descriptor 1 */
 133#define LE_T1_OWN	0x8000	/* Lance owns the packet */
 134#define LE_T1_ERR	0x4000	/* Error summary */
 135#define LE_T1_EMORE	0x1000	/* Error: more than one retry needed */
 136#define LE_T1_EONE	0x0800	/* Error: one retry needed */
 137#define LE_T1_EDEF	0x0400	/* Error: deferred */
 138#define LE_T1_SOP	0x0200	/* Start of packet */
 139#define LE_T1_EOP	0x0100	/* End of packet */
 140#define LE_T1_POK	0x0300	/* Packet is complete: SOP + EOP */
 141
 142#define LE_T3_BUF       0x8000	/* Buffer error */
 143#define LE_T3_UFL       0x4000	/* Error underflow */
 144#define LE_T3_LCOL      0x1000	/* Error late collision */
 145#define LE_T3_CLOS      0x0800	/* Error carrier loss */
 146#define LE_T3_RTY       0x0400	/* Error retry */
 147#define LE_T3_TDR       0x03ff	/* Time Domain Reflectometry counter */
 148
 149/* Define: 2^4 Tx buffers and 2^4 Rx buffers */
 150
 151#ifndef LANCE_LOG_TX_BUFFERS
 152#define LANCE_LOG_TX_BUFFERS 4
 153#define LANCE_LOG_RX_BUFFERS 4
 154#endif
 155
 156#define TX_RING_SIZE			(1 << (LANCE_LOG_TX_BUFFERS))
 157#define TX_RING_MOD_MASK		(TX_RING_SIZE - 1)
 158
 159#define RX_RING_SIZE			(1 << (LANCE_LOG_RX_BUFFERS))
 160#define RX_RING_MOD_MASK		(RX_RING_SIZE - 1)
 161
 162#define PKT_BUF_SZ		1536
 163#define RX_BUFF_SIZE            PKT_BUF_SZ
 164#define TX_BUFF_SIZE            PKT_BUF_SZ
 165
 166#undef TEST_HITS
 167#define ZERO 0
 168
 169/*
 170 * The DS2100/3100 have a linear 64 kB buffer which supports halfword
 171 * accesses only.  Each halfword of the buffer is word-aligned in the
 172 * CPU address space.
 173 *
 174 * The PMAD-AA has a 128 kB buffer on-board.
 175 *
 176 * The IOASIC LANCE devices use a shared memory region.  This region
 177 * as seen from the CPU is (max) 128 kB long and has to be on an 128 kB
 178 * boundary.  The LANCE sees this as a 64 kB long continuous memory
 179 * region.
 180 *
 181 * The LANCE's DMA address is used as an index in this buffer and DMA
 182 * takes place in bursts of eight 16-bit words which are packed into
 183 * four 32-bit words by the IOASIC.  This leads to a strange padding:
 184 * 16 bytes of valid data followed by a 16 byte gap :-(.
 185 */
 186
 187struct lance_rx_desc {
 188	unsigned short rmd0;		/* low address of packet */
 189	unsigned short rmd1;		/* high address of packet
 190					   and descriptor bits */
 191	short length;			/* 2s complement (negative!)
 192					   of buffer length */
 193	unsigned short mblength;	/* actual number of bytes received */
 194};
 195
 196struct lance_tx_desc {
 197	unsigned short tmd0;		/* low address of packet */
 198	unsigned short tmd1;		/* high address of packet
 199					   and descriptor bits */
 200	short length;			/* 2s complement (negative!)
 201					   of buffer length */
 202	unsigned short misc;
 203};
 204
 205
 206/* First part of the LANCE initialization block, described in databook. */
 207struct lance_init_block {
 208	unsigned short mode;		/* pre-set mode (reg. 15) */
 209
 210	unsigned short phys_addr[3];	/* physical ethernet address */
 211	unsigned short filter[4];	/* multicast filter */
 212
 213	/* Receive and transmit ring base, along with extra bits. */
 214	unsigned short rx_ptr;		/* receive descriptor addr */
 215	unsigned short rx_len;		/* receive len and high addr */
 216	unsigned short tx_ptr;		/* transmit descriptor addr */
 217	unsigned short tx_len;		/* transmit len and high addr */
 218
 219	short gap[4];
 220
 221	/* The buffer descriptors */
 222	struct lance_rx_desc brx_ring[RX_RING_SIZE];
 223	struct lance_tx_desc btx_ring[TX_RING_SIZE];
 224};
 225
 226#define BUF_OFFSET_CPU sizeof(struct lance_init_block)
 227#define BUF_OFFSET_LNC sizeof(struct lance_init_block)
 228
 229#define shift_off(off, type)						\
 230	(type == ASIC_LANCE || type == PMAX_LANCE ? off << 1 : off)
 231
 232#define lib_off(rt, type)						\
 233	shift_off(offsetof(struct lance_init_block, rt), type)
 234
 235#define lib_ptr(ib, rt, type) 						\
 236	((volatile u16 *)((u8 *)(ib) + lib_off(rt, type)))
 237
 238#define rds_off(rt, type)						\
 239	shift_off(offsetof(struct lance_rx_desc, rt), type)
 240
 241#define rds_ptr(rd, rt, type) 						\
 242	((volatile u16 *)((u8 *)(rd) + rds_off(rt, type)))
 243
 244#define tds_off(rt, type)						\
 245	shift_off(offsetof(struct lance_tx_desc, rt), type)
 246
 247#define tds_ptr(td, rt, type) 						\
 248	((volatile u16 *)((u8 *)(td) + tds_off(rt, type)))
 249
 250struct lance_private {
 251	struct net_device *next;
 252	int type;
 253	int dma_irq;
 254	volatile struct lance_regs *ll;
 255
 256	spinlock_t	lock;
 257
 258	int rx_new, tx_new;
 259	int rx_old, tx_old;
 260
 261	unsigned short busmaster_regval;
 262
 263	struct timer_list       multicast_timer;
 264	struct net_device	*dev;
 265
 266	/* Pointers to the ring buffers as seen from the CPU */
 267	char *rx_buf_ptr_cpu[RX_RING_SIZE];
 268	char *tx_buf_ptr_cpu[TX_RING_SIZE];
 269
 270	/* Pointers to the ring buffers as seen from the LANCE */
 271	uint rx_buf_ptr_lnc[RX_RING_SIZE];
 272	uint tx_buf_ptr_lnc[TX_RING_SIZE];
 273};
 274
 275#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
 276			lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
 277			lp->tx_old - lp->tx_new-1)
 278
 279/* The lance control ports are at an absolute address, machine and tc-slot
 280 * dependent.
 281 * DECstations do only 32-bit access and the LANCE uses 16 bit addresses,
 282 * so we have to give the structure an extra member making rap pointing
 283 * at the right address
 284 */
 285struct lance_regs {
 286	volatile unsigned short rdp;	/* register data port */
 287	unsigned short pad;
 288	volatile unsigned short rap;	/* register address port */
 289};
 290
 291int dec_lance_debug = 2;
 292
 293static struct tc_driver dec_lance_tc_driver;
 294static struct net_device *root_lance_dev;
 295
 296static inline void writereg(volatile unsigned short *regptr, short value)
 297{
 298	*regptr = value;
 299	iob();
 300}
 301
 302/* Load the CSR registers */
 303static void load_csrs(struct lance_private *lp)
 304{
 305	volatile struct lance_regs *ll = lp->ll;
 306	uint leptr;
 307
 308	/* The address space as seen from the LANCE
 309	 * begins at address 0. HK
 310	 */
 311	leptr = 0;
 312
 313	writereg(&ll->rap, LE_CSR1);
 314	writereg(&ll->rdp, (leptr & 0xFFFF));
 315	writereg(&ll->rap, LE_CSR2);
 316	writereg(&ll->rdp, leptr >> 16);
 317	writereg(&ll->rap, LE_CSR3);
 318	writereg(&ll->rdp, lp->busmaster_regval);
 319
 320	/* Point back to csr0 */
 321	writereg(&ll->rap, LE_CSR0);
 322}
 323
 324/*
 325 * Our specialized copy routines
 326 *
 327 */
 328static void cp_to_buf(const int type, void *to, const void *from, int len)
 329{
 330	unsigned short *tp;
 331	const unsigned short *fp;
 332	unsigned short clen;
 333	unsigned char *rtp;
 334	const unsigned char *rfp;
 335
 336	if (type == PMAD_LANCE) {
 337		memcpy(to, from, len);
 338	} else if (type == PMAX_LANCE) {
 339		clen = len >> 1;
 340		tp = to;
 341		fp = from;
 342
 343		while (clen--) {
 344			*tp++ = *fp++;
 345			tp++;
 346		}
 347
 348		clen = len & 1;
 349		rtp = (unsigned char *)tp;
 350		rfp = (const unsigned char *)fp;
 351		while (clen--) {
 352			*rtp++ = *rfp++;
 353		}
 354	} else {
 355		/*
 356		 * copy 16 Byte chunks
 357		 */
 358		clen = len >> 4;
 359		tp = to;
 360		fp = from;
 361		while (clen--) {
 362			*tp++ = *fp++;
 363			*tp++ = *fp++;
 364			*tp++ = *fp++;
 365			*tp++ = *fp++;
 366			*tp++ = *fp++;
 367			*tp++ = *fp++;
 368			*tp++ = *fp++;
 369			*tp++ = *fp++;
 370			tp += 8;
 371		}
 372
 373		/*
 374		 * do the rest, if any.
 375		 */
 376		clen = len & 15;
 377		rtp = (unsigned char *)tp;
 378		rfp = (const unsigned char *)fp;
 379		while (clen--) {
 380			*rtp++ = *rfp++;
 381		}
 382	}
 383
 384	iob();
 385}
 386
 387static void cp_from_buf(const int type, void *to, const void *from, int len)
 388{
 389	unsigned short *tp;
 390	const unsigned short *fp;
 391	unsigned short clen;
 392	unsigned char *rtp;
 393	const unsigned char *rfp;
 394
 395	if (type == PMAD_LANCE) {
 396		memcpy(to, from, len);
 397	} else if (type == PMAX_LANCE) {
 398		clen = len >> 1;
 399		tp = to;
 400		fp = from;
 401		while (clen--) {
 402			*tp++ = *fp++;
 403			fp++;
 404		}
 405
 406		clen = len & 1;
 407
 408		rtp = (unsigned char *)tp;
 409		rfp = (const unsigned char *)fp;
 410
 411		while (clen--) {
 412			*rtp++ = *rfp++;
 413		}
 414	} else {
 415
 416		/*
 417		 * copy 16 Byte chunks
 418		 */
 419		clen = len >> 4;
 420		tp = to;
 421		fp = from;
 422		while (clen--) {
 423			*tp++ = *fp++;
 424			*tp++ = *fp++;
 425			*tp++ = *fp++;
 426			*tp++ = *fp++;
 427			*tp++ = *fp++;
 428			*tp++ = *fp++;
 429			*tp++ = *fp++;
 430			*tp++ = *fp++;
 431			fp += 8;
 432		}
 433
 434		/*
 435		 * do the rest, if any.
 436		 */
 437		clen = len & 15;
 438		rtp = (unsigned char *)tp;
 439		rfp = (const unsigned char *)fp;
 440		while (clen--) {
 441			*rtp++ = *rfp++;
 442		}
 443
 444
 445	}
 446
 447}
 448
 449/* Setup the Lance Rx and Tx rings */
 450static void lance_init_ring(struct net_device *dev)
 451{
 452	struct lance_private *lp = netdev_priv(dev);
 453	volatile u16 *ib = (volatile u16 *)dev->mem_start;
 454	uint leptr;
 455	int i;
 456
 457	/* Lock out other processes while setting up hardware */
 458	netif_stop_queue(dev);
 459	lp->rx_new = lp->tx_new = 0;
 460	lp->rx_old = lp->tx_old = 0;
 461
 462	/* Copy the ethernet address to the lance init block.
 463	 * XXX bit 0 of the physical address registers has to be zero
 464	 */
 465	*lib_ptr(ib, phys_addr[0], lp->type) = (dev->dev_addr[1] << 8) |
 466				     dev->dev_addr[0];
 467	*lib_ptr(ib, phys_addr[1], lp->type) = (dev->dev_addr[3] << 8) |
 468				     dev->dev_addr[2];
 469	*lib_ptr(ib, phys_addr[2], lp->type) = (dev->dev_addr[5] << 8) |
 470				     dev->dev_addr[4];
 471	/* Setup the initialization block */
 472
 473	/* Setup rx descriptor pointer */
 474	leptr = offsetof(struct lance_init_block, brx_ring);
 475	*lib_ptr(ib, rx_len, lp->type) = (LANCE_LOG_RX_BUFFERS << 13) |
 476					 (leptr >> 16);
 477	*lib_ptr(ib, rx_ptr, lp->type) = leptr;
 478	if (ZERO)
 479		printk("RX ptr: %8.8x(%8.8x)\n",
 480		       leptr, (uint)lib_off(brx_ring, lp->type));
 481
 482	/* Setup tx descriptor pointer */
 483	leptr = offsetof(struct lance_init_block, btx_ring);
 484	*lib_ptr(ib, tx_len, lp->type) = (LANCE_LOG_TX_BUFFERS << 13) |
 485					 (leptr >> 16);
 486	*lib_ptr(ib, tx_ptr, lp->type) = leptr;
 487	if (ZERO)
 488		printk("TX ptr: %8.8x(%8.8x)\n",
 489		       leptr, (uint)lib_off(btx_ring, lp->type));
 490
 491	if (ZERO)
 492		printk("TX rings:\n");
 493
 494	/* Setup the Tx ring entries */
 495	for (i = 0; i < TX_RING_SIZE; i++) {
 496		leptr = lp->tx_buf_ptr_lnc[i];
 497		*lib_ptr(ib, btx_ring[i].tmd0, lp->type) = leptr;
 498		*lib_ptr(ib, btx_ring[i].tmd1, lp->type) = (leptr >> 16) &
 499							   0xff;
 500		*lib_ptr(ib, btx_ring[i].length, lp->type) = 0xf000;
 501						/* The ones required by tmd2 */
 502		*lib_ptr(ib, btx_ring[i].misc, lp->type) = 0;
 503		if (i < 3 && ZERO)
 504			printk("%d: %8.8x(%p)\n",
 505			       i, leptr, lp->tx_buf_ptr_cpu[i]);
 506	}
 507
 508	/* Setup the Rx ring entries */
 509	if (ZERO)
 510		printk("RX rings:\n");
 511	for (i = 0; i < RX_RING_SIZE; i++) {
 512		leptr = lp->rx_buf_ptr_lnc[i];
 513		*lib_ptr(ib, brx_ring[i].rmd0, lp->type) = leptr;
 514		*lib_ptr(ib, brx_ring[i].rmd1, lp->type) = ((leptr >> 16) &
 515							    0xff) |
 516							   LE_R1_OWN;
 517		*lib_ptr(ib, brx_ring[i].length, lp->type) = -RX_BUFF_SIZE |
 518							     0xf000;
 519		*lib_ptr(ib, brx_ring[i].mblength, lp->type) = 0;
 520		if (i < 3 && ZERO)
 521			printk("%d: %8.8x(%p)\n",
 522			       i, leptr, lp->rx_buf_ptr_cpu[i]);
 523	}
 524	iob();
 525}
 526
 527static int init_restart_lance(struct lance_private *lp)
 528{
 529	volatile struct lance_regs *ll = lp->ll;
 530	int i;
 531
 532	writereg(&ll->rap, LE_CSR0);
 533	writereg(&ll->rdp, LE_C0_INIT);
 534
 535	/* Wait for the lance to complete initialization */
 536	for (i = 0; (i < 100) && !(ll->rdp & LE_C0_IDON); i++) {
 537		udelay(10);
 538	}
 539	if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
 540		printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
 541		       i, ll->rdp);
 542		return -1;
 543	}
 544	if ((ll->rdp & LE_C0_ERR)) {
 545		printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
 546		       i, ll->rdp);
 547		return -1;
 548	}
 549	writereg(&ll->rdp, LE_C0_IDON);
 550	writereg(&ll->rdp, LE_C0_STRT);
 551	writereg(&ll->rdp, LE_C0_INEA);
 552
 553	return 0;
 554}
 555
 556static int lance_rx(struct net_device *dev)
 557{
 558	struct lance_private *lp = netdev_priv(dev);
 559	volatile u16 *ib = (volatile u16 *)dev->mem_start;
 560	volatile u16 *rd;
 561	unsigned short bits;
 562	int entry, len;
 563	struct sk_buff *skb;
 564
 565#ifdef TEST_HITS
 566	{
 567		int i;
 568
 569		printk("[");
 570		for (i = 0; i < RX_RING_SIZE; i++) {
 571			if (i == lp->rx_new)
 572				printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
 573						      lp->type) &
 574					     LE_R1_OWN ? "_" : "X");
 575			else
 576				printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
 577						      lp->type) &
 578					     LE_R1_OWN ? "." : "1");
 579		}
 580		printk("]");
 581	}
 582#endif
 583
 584	for (rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type);
 585	     !((bits = *rds_ptr(rd, rmd1, lp->type)) & LE_R1_OWN);
 586	     rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type)) {
 587		entry = lp->rx_new;
 588
 589		/* We got an incomplete frame? */
 590		if ((bits & LE_R1_POK) != LE_R1_POK) {
 591			dev->stats.rx_over_errors++;
 592			dev->stats.rx_errors++;
 593		} else if (bits & LE_R1_ERR) {
 594			/* Count only the end frame as a rx error,
 595			 * not the beginning
 596			 */
 597			if (bits & LE_R1_BUF)
 598				dev->stats.rx_fifo_errors++;
 599			if (bits & LE_R1_CRC)
 600				dev->stats.rx_crc_errors++;
 601			if (bits & LE_R1_OFL)
 602				dev->stats.rx_over_errors++;
 603			if (bits & LE_R1_FRA)
 604				dev->stats.rx_frame_errors++;
 605			if (bits & LE_R1_EOP)
 606				dev->stats.rx_errors++;
 607		} else {
 608			len = (*rds_ptr(rd, mblength, lp->type) & 0xfff) - 4;
 609			skb = netdev_alloc_skb(dev, len + 2);
 610
 611			if (!skb) {
 612				dev->stats.rx_dropped++;
 613				*rds_ptr(rd, mblength, lp->type) = 0;
 614				*rds_ptr(rd, rmd1, lp->type) =
 615					((lp->rx_buf_ptr_lnc[entry] >> 16) &
 616					 0xff) | LE_R1_OWN;
 617				lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
 618				return 0;
 619			}
 620			dev->stats.rx_bytes += len;
 621
 622			skb_reserve(skb, 2);	/* 16 byte align */
 623			skb_put(skb, len);	/* make room */
 624
 625			cp_from_buf(lp->type, skb->data,
 626				    lp->rx_buf_ptr_cpu[entry], len);
 627
 628			skb->protocol = eth_type_trans(skb, dev);
 629			netif_rx(skb);
 630			dev->stats.rx_packets++;
 631		}
 632
 633		/* Return the packet to the pool */
 634		*rds_ptr(rd, mblength, lp->type) = 0;
 635		*rds_ptr(rd, length, lp->type) = -RX_BUFF_SIZE | 0xf000;
 636		*rds_ptr(rd, rmd1, lp->type) =
 637			((lp->rx_buf_ptr_lnc[entry] >> 16) & 0xff) | LE_R1_OWN;
 638		lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
 639	}
 640	return 0;
 641}
 642
 643static void lance_tx(struct net_device *dev)
 644{
 645	struct lance_private *lp = netdev_priv(dev);
 646	volatile u16 *ib = (volatile u16 *)dev->mem_start;
 647	volatile struct lance_regs *ll = lp->ll;
 648	volatile u16 *td;
 649	int i, j;
 650	int status;
 651
 652	j = lp->tx_old;
 653
 654	spin_lock(&lp->lock);
 655
 656	for (i = j; i != lp->tx_new; i = j) {
 657		td = lib_ptr(ib, btx_ring[i], lp->type);
 658		/* If we hit a packet not owned by us, stop */
 659		if (*tds_ptr(td, tmd1, lp->type) & LE_T1_OWN)
 660			break;
 661
 662		if (*tds_ptr(td, tmd1, lp->type) & LE_T1_ERR) {
 663			status = *tds_ptr(td, misc, lp->type);
 664
 665			dev->stats.tx_errors++;
 666			if (status & LE_T3_RTY)
 667				dev->stats.tx_aborted_errors++;
 668			if (status & LE_T3_LCOL)
 669				dev->stats.tx_window_errors++;
 670
 671			if (status & LE_T3_CLOS) {
 672				dev->stats.tx_carrier_errors++;
 673				printk("%s: Carrier Lost\n", dev->name);
 674				/* Stop the lance */
 675				writereg(&ll->rap, LE_CSR0);
 676				writereg(&ll->rdp, LE_C0_STOP);
 677				lance_init_ring(dev);
 678				load_csrs(lp);
 679				init_restart_lance(lp);
 680				goto out;
 681			}
 682			/* Buffer errors and underflows turn off the
 683			 * transmitter, restart the adapter.
 684			 */
 685			if (status & (LE_T3_BUF | LE_T3_UFL)) {
 686				dev->stats.tx_fifo_errors++;
 687
 688				printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
 689				       dev->name);
 690				/* Stop the lance */
 691				writereg(&ll->rap, LE_CSR0);
 692				writereg(&ll->rdp, LE_C0_STOP);
 693				lance_init_ring(dev);
 694				load_csrs(lp);
 695				init_restart_lance(lp);
 696				goto out;
 697			}
 698		} else if ((*tds_ptr(td, tmd1, lp->type) & LE_T1_POK) ==
 699			   LE_T1_POK) {
 700			/*
 701			 * So we don't count the packet more than once.
 702			 */
 703			*tds_ptr(td, tmd1, lp->type) &= ~(LE_T1_POK);
 704
 705			/* One collision before packet was sent. */
 706			if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EONE)
 707				dev->stats.collisions++;
 708
 709			/* More than one collision, be optimistic. */
 710			if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EMORE)
 711				dev->stats.collisions += 2;
 712
 713			dev->stats.tx_packets++;
 714		}
 715		j = (j + 1) & TX_RING_MOD_MASK;
 716	}
 717	lp->tx_old = j;
 718out:
 719	if (netif_queue_stopped(dev) &&
 720	    TX_BUFFS_AVAIL > 0)
 721		netif_wake_queue(dev);
 722
 723	spin_unlock(&lp->lock);
 724}
 725
 726static irqreturn_t lance_dma_merr_int(int irq, void *dev_id)
 727{
 728	struct net_device *dev = dev_id;
 729
 730	printk(KERN_ERR "%s: DMA error\n", dev->name);
 731	return IRQ_HANDLED;
 732}
 733
 734static irqreturn_t lance_interrupt(int irq, void *dev_id)
 735{
 736	struct net_device *dev = dev_id;
 737	struct lance_private *lp = netdev_priv(dev);
 738	volatile struct lance_regs *ll = lp->ll;
 739	int csr0;
 740
 741	writereg(&ll->rap, LE_CSR0);
 742	csr0 = ll->rdp;
 743
 744	/* Acknowledge all the interrupt sources ASAP */
 745	writereg(&ll->rdp, csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT));
 746
 747	if ((csr0 & LE_C0_ERR)) {
 748		/* Clear the error condition */
 749		writereg(&ll->rdp, LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
 750			 LE_C0_CERR | LE_C0_MERR);
 751	}
 752	if (csr0 & LE_C0_RINT)
 753		lance_rx(dev);
 754
 755	if (csr0 & LE_C0_TINT)
 756		lance_tx(dev);
 757
 758	if (csr0 & LE_C0_BABL)
 759		dev->stats.tx_errors++;
 760
 761	if (csr0 & LE_C0_MISS)
 762		dev->stats.rx_errors++;
 763
 764	if (csr0 & LE_C0_MERR) {
 765		printk("%s: Memory error, status %04x\n", dev->name, csr0);
 766
 767		writereg(&ll->rdp, LE_C0_STOP);
 768
 769		lance_init_ring(dev);
 770		load_csrs(lp);
 771		init_restart_lance(lp);
 772		netif_wake_queue(dev);
 773	}
 774
 775	writereg(&ll->rdp, LE_C0_INEA);
 776	writereg(&ll->rdp, LE_C0_INEA);
 777	return IRQ_HANDLED;
 778}
 779
 780static int lance_open(struct net_device *dev)
 781{
 782	volatile u16 *ib = (volatile u16 *)dev->mem_start;
 783	struct lance_private *lp = netdev_priv(dev);
 784	volatile struct lance_regs *ll = lp->ll;
 785	int status = 0;
 786
 787	/* Stop the Lance */
 788	writereg(&ll->rap, LE_CSR0);
 789	writereg(&ll->rdp, LE_C0_STOP);
 790
 791	/* Set mode and clear multicast filter only at device open,
 792	 * so that lance_init_ring() called at any error will not
 793	 * forget multicast filters.
 794	 *
 795	 * BTW it is common bug in all lance drivers! --ANK
 796	 */
 797	*lib_ptr(ib, mode, lp->type) = 0;
 798	*lib_ptr(ib, filter[0], lp->type) = 0;
 799	*lib_ptr(ib, filter[1], lp->type) = 0;
 800	*lib_ptr(ib, filter[2], lp->type) = 0;
 801	*lib_ptr(ib, filter[3], lp->type) = 0;
 802
 803	lance_init_ring(dev);
 804	load_csrs(lp);
 805
 806	netif_start_queue(dev);
 807
 808	/* Associate IRQ with lance_interrupt */
 809	if (request_irq(dev->irq, lance_interrupt, 0, "lance", dev)) {
 810		printk("%s: Can't get IRQ %d\n", dev->name, dev->irq);
 811		return -EAGAIN;
 812	}
 813	if (lp->dma_irq >= 0) {
 814		unsigned long flags;
 815
 816		if (request_irq(lp->dma_irq, lance_dma_merr_int, IRQF_ONESHOT,
 817				"lance error", dev)) {
 818			free_irq(dev->irq, dev);
 819			printk("%s: Can't get DMA IRQ %d\n", dev->name,
 820				lp->dma_irq);
 821			return -EAGAIN;
 822		}
 823
 824		spin_lock_irqsave(&ioasic_ssr_lock, flags);
 825
 826		fast_mb();
 827		/* Enable I/O ASIC LANCE DMA.  */
 828		ioasic_write(IO_REG_SSR,
 829			     ioasic_read(IO_REG_SSR) | IO_SSR_LANCE_DMA_EN);
 830
 831		fast_mb();
 832		spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
 833	}
 834
 835	status = init_restart_lance(lp);
 836	return status;
 837}
 838
 839static int lance_close(struct net_device *dev)
 840{
 841	struct lance_private *lp = netdev_priv(dev);
 842	volatile struct lance_regs *ll = lp->ll;
 843
 844	netif_stop_queue(dev);
 845	del_timer_sync(&lp->multicast_timer);
 846
 847	/* Stop the card */
 848	writereg(&ll->rap, LE_CSR0);
 849	writereg(&ll->rdp, LE_C0_STOP);
 850
 851	if (lp->dma_irq >= 0) {
 852		unsigned long flags;
 853
 854		spin_lock_irqsave(&ioasic_ssr_lock, flags);
 855
 856		fast_mb();
 857		/* Disable I/O ASIC LANCE DMA.  */
 858		ioasic_write(IO_REG_SSR,
 859			     ioasic_read(IO_REG_SSR) & ~IO_SSR_LANCE_DMA_EN);
 860
 861		fast_iob();
 862		spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
 863
 864		free_irq(lp->dma_irq, dev);
 865	}
 866	free_irq(dev->irq, dev);
 867	return 0;
 868}
 869
 870static inline int lance_reset(struct net_device *dev)
 871{
 872	struct lance_private *lp = netdev_priv(dev);
 873	volatile struct lance_regs *ll = lp->ll;
 874	int status;
 875
 876	/* Stop the lance */
 877	writereg(&ll->rap, LE_CSR0);
 878	writereg(&ll->rdp, LE_C0_STOP);
 879
 880	lance_init_ring(dev);
 881	load_csrs(lp);
 882	netif_trans_update(dev); /* prevent tx timeout */
 883	status = init_restart_lance(lp);
 884	return status;
 885}
 886
 887static void lance_tx_timeout(struct net_device *dev, unsigned int txqueue)
 888{
 889	struct lance_private *lp = netdev_priv(dev);
 890	volatile struct lance_regs *ll = lp->ll;
 891
 892	printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
 893		dev->name, ll->rdp);
 894	lance_reset(dev);
 895	netif_wake_queue(dev);
 896}
 897
 898static netdev_tx_t lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
 899{
 900	struct lance_private *lp = netdev_priv(dev);
 901	volatile struct lance_regs *ll = lp->ll;
 902	volatile u16 *ib = (volatile u16 *)dev->mem_start;
 903	unsigned long flags;
 904	int entry, len;
 905
 906	len = skb->len;
 907
 908	if (len < ETH_ZLEN) {
 909		if (skb_padto(skb, ETH_ZLEN))
 910			return NETDEV_TX_OK;
 911		len = ETH_ZLEN;
 912	}
 913
 914	dev->stats.tx_bytes += len;
 915
 916	spin_lock_irqsave(&lp->lock, flags);
 917
 918	entry = lp->tx_new;
 919	*lib_ptr(ib, btx_ring[entry].length, lp->type) = (-len);
 920	*lib_ptr(ib, btx_ring[entry].misc, lp->type) = 0;
 921
 922	cp_to_buf(lp->type, lp->tx_buf_ptr_cpu[entry], skb->data, len);
 923
 924	/* Now, give the packet to the lance */
 925	*lib_ptr(ib, btx_ring[entry].tmd1, lp->type) =
 926		((lp->tx_buf_ptr_lnc[entry] >> 16) & 0xff) |
 927		(LE_T1_POK | LE_T1_OWN);
 928	lp->tx_new = (entry + 1) & TX_RING_MOD_MASK;
 929
 930	if (TX_BUFFS_AVAIL <= 0)
 931		netif_stop_queue(dev);
 932
 933	/* Kick the lance: transmit now */
 934	writereg(&ll->rdp, LE_C0_INEA | LE_C0_TDMD);
 935
 936	spin_unlock_irqrestore(&lp->lock, flags);
 937
 938	dev_kfree_skb(skb);
 939
 940	return NETDEV_TX_OK;
 941}
 942
 943static void lance_load_multicast(struct net_device *dev)
 944{
 945	struct lance_private *lp = netdev_priv(dev);
 946	volatile u16 *ib = (volatile u16 *)dev->mem_start;
 947	struct netdev_hw_addr *ha;
 948	u32 crc;
 949
 950	/* set all multicast bits */
 951	if (dev->flags & IFF_ALLMULTI) {
 952		*lib_ptr(ib, filter[0], lp->type) = 0xffff;
 953		*lib_ptr(ib, filter[1], lp->type) = 0xffff;
 954		*lib_ptr(ib, filter[2], lp->type) = 0xffff;
 955		*lib_ptr(ib, filter[3], lp->type) = 0xffff;
 956		return;
 957	}
 958	/* clear the multicast filter */
 959	*lib_ptr(ib, filter[0], lp->type) = 0;
 960	*lib_ptr(ib, filter[1], lp->type) = 0;
 961	*lib_ptr(ib, filter[2], lp->type) = 0;
 962	*lib_ptr(ib, filter[3], lp->type) = 0;
 963
 964	/* Add addresses */
 965	netdev_for_each_mc_addr(ha, dev) {
 966		crc = ether_crc_le(ETH_ALEN, ha->addr);
 967		crc = crc >> 26;
 968		*lib_ptr(ib, filter[crc >> 4], lp->type) |= 1 << (crc & 0xf);
 969	}
 970}
 971
 972static void lance_set_multicast(struct net_device *dev)
 973{
 974	struct lance_private *lp = netdev_priv(dev);
 975	volatile u16 *ib = (volatile u16 *)dev->mem_start;
 976	volatile struct lance_regs *ll = lp->ll;
 977
 978	if (!netif_running(dev))
 979		return;
 980
 981	if (lp->tx_old != lp->tx_new) {
 982		mod_timer(&lp->multicast_timer, jiffies + 4 * HZ/100);
 983		netif_wake_queue(dev);
 984		return;
 985	}
 986
 987	netif_stop_queue(dev);
 988
 989	writereg(&ll->rap, LE_CSR0);
 990	writereg(&ll->rdp, LE_C0_STOP);
 991
 992	lance_init_ring(dev);
 993
 994	if (dev->flags & IFF_PROMISC) {
 995		*lib_ptr(ib, mode, lp->type) |= LE_MO_PROM;
 996	} else {
 997		*lib_ptr(ib, mode, lp->type) &= ~LE_MO_PROM;
 998		lance_load_multicast(dev);
 999	}
1000	load_csrs(lp);
1001	init_restart_lance(lp);
1002	netif_wake_queue(dev);
1003}
1004
1005static void lance_set_multicast_retry(struct timer_list *t)
1006{
1007	struct lance_private *lp = from_timer(lp, t, multicast_timer);
1008	struct net_device *dev = lp->dev;
1009
1010	lance_set_multicast(dev);
1011}
1012
1013static const struct net_device_ops lance_netdev_ops = {
1014	.ndo_open		= lance_open,
1015	.ndo_stop		= lance_close,
1016	.ndo_start_xmit		= lance_start_xmit,
1017	.ndo_tx_timeout		= lance_tx_timeout,
1018	.ndo_set_rx_mode	= lance_set_multicast,
1019	.ndo_validate_addr	= eth_validate_addr,
1020	.ndo_set_mac_address	= eth_mac_addr,
1021};
1022
1023static int dec_lance_probe(struct device *bdev, const int type)
1024{
1025	static unsigned version_printed;
1026	static const char fmt[] = "declance%d";
1027	char name[10];
1028	struct net_device *dev;
1029	struct lance_private *lp;
1030	volatile struct lance_regs *ll;
1031	resource_size_t start = 0, len = 0;
1032	int i, ret;
1033	unsigned long esar_base;
1034	unsigned char *esar;
1035	u8 addr[ETH_ALEN];
1036	const char *desc;
1037
1038	if (dec_lance_debug && version_printed++ == 0)
1039		printk(version);
1040
1041	if (bdev)
1042		snprintf(name, sizeof(name), "%s", dev_name(bdev));
1043	else {
1044		i = 0;
1045		dev = root_lance_dev;
1046		while (dev) {
1047			i++;
1048			lp = netdev_priv(dev);
1049			dev = lp->next;
1050		}
1051		snprintf(name, sizeof(name), fmt, i);
1052	}
1053
1054	dev = alloc_etherdev(sizeof(struct lance_private));
1055	if (!dev) {
1056		ret = -ENOMEM;
1057		goto err_out;
1058	}
1059
1060	/*
1061	 * alloc_etherdev ensures the data structures used by the LANCE
1062	 * are aligned.
1063	 */
1064	lp = netdev_priv(dev);
1065	spin_lock_init(&lp->lock);
1066
1067	lp->type = type;
1068	switch (type) {
1069	case ASIC_LANCE:
1070		dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE);
1071
1072		/* buffer space for the on-board LANCE shared memory */
1073		/*
1074		 * FIXME: ugly hack!
1075		 */
1076		dev->mem_start = CKSEG1ADDR(0x00020000);
1077		dev->mem_end = dev->mem_start + 0x00020000;
1078		dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1079		esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_ESAR);
1080
1081		/* Workaround crash with booting KN04 2.1k from Disk */
1082		memset((void *)dev->mem_start, 0,
1083		       dev->mem_end - dev->mem_start);
1084
1085		/*
1086		 * setup the pointer arrays, this sucks [tm] :-(
1087		 */
1088		for (i = 0; i < RX_RING_SIZE; i++) {
1089			lp->rx_buf_ptr_cpu[i] =
1090				(char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1091					 2 * i * RX_BUFF_SIZE);
1092			lp->rx_buf_ptr_lnc[i] =
1093				(BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1094		}
1095		for (i = 0; i < TX_RING_SIZE; i++) {
1096			lp->tx_buf_ptr_cpu[i] =
1097				(char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1098					 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1099					 2 * i * TX_BUFF_SIZE);
1100			lp->tx_buf_ptr_lnc[i] =
1101				(BUF_OFFSET_LNC +
1102				 RX_RING_SIZE * RX_BUFF_SIZE +
1103				 i * TX_BUFF_SIZE);
1104		}
1105
1106		/* Setup I/O ASIC LANCE DMA.  */
1107		lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR];
1108		ioasic_write(IO_REG_LANCE_DMA_P,
1109			     CPHYSADDR(dev->mem_start) << 3);
1110
1111		break;
1112#ifdef CONFIG_TC
1113	case PMAD_LANCE:
1114		dev_set_drvdata(bdev, dev);
1115
1116		start = to_tc_dev(bdev)->resource.start;
1117		len = to_tc_dev(bdev)->resource.end - start + 1;
1118		if (!request_mem_region(start, len, dev_name(bdev))) {
1119			printk(KERN_ERR
1120			       "%s: Unable to reserve MMIO resource\n",
1121			       dev_name(bdev));
1122			ret = -EBUSY;
1123			goto err_out_dev;
1124		}
1125
1126		dev->mem_start = CKSEG1ADDR(start);
1127		dev->mem_end = dev->mem_start + 0x100000;
1128		dev->base_addr = dev->mem_start + 0x100000;
1129		dev->irq = to_tc_dev(bdev)->interrupt;
1130		esar_base = dev->mem_start + 0x1c0002;
1131		lp->dma_irq = -1;
1132
1133		for (i = 0; i < RX_RING_SIZE; i++) {
1134			lp->rx_buf_ptr_cpu[i] =
1135				(char *)(dev->mem_start + BUF_OFFSET_CPU +
1136					 i * RX_BUFF_SIZE);
1137			lp->rx_buf_ptr_lnc[i] =
1138				(BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1139		}
1140		for (i = 0; i < TX_RING_SIZE; i++) {
1141			lp->tx_buf_ptr_cpu[i] =
1142				(char *)(dev->mem_start + BUF_OFFSET_CPU +
1143					 RX_RING_SIZE * RX_BUFF_SIZE +
1144					 i * TX_BUFF_SIZE);
1145			lp->tx_buf_ptr_lnc[i] =
1146				(BUF_OFFSET_LNC +
1147				 RX_RING_SIZE * RX_BUFF_SIZE +
1148				 i * TX_BUFF_SIZE);
1149		}
1150
1151		break;
1152#endif
1153	case PMAX_LANCE:
1154		dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1155		dev->base_addr = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE);
1156		dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM);
1157		dev->mem_end = dev->mem_start + KN01_SLOT_SIZE;
1158		esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 1);
1159		lp->dma_irq = -1;
1160
1161		/*
1162		 * setup the pointer arrays, this sucks [tm] :-(
1163		 */
1164		for (i = 0; i < RX_RING_SIZE; i++) {
1165			lp->rx_buf_ptr_cpu[i] =
1166				(char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1167					 2 * i * RX_BUFF_SIZE);
1168			lp->rx_buf_ptr_lnc[i] =
1169				(BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1170		}
1171		for (i = 0; i < TX_RING_SIZE; i++) {
1172			lp->tx_buf_ptr_cpu[i] =
1173				(char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1174					 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1175					 2 * i * TX_BUFF_SIZE);
1176			lp->tx_buf_ptr_lnc[i] =
1177				(BUF_OFFSET_LNC +
1178				 RX_RING_SIZE * RX_BUFF_SIZE +
1179				 i * TX_BUFF_SIZE);
1180		}
1181
1182		break;
1183
1184	default:
1185		printk(KERN_ERR "%s: declance_init called with unknown type\n",
1186			name);
1187		ret = -ENODEV;
1188		goto err_out_dev;
1189	}
1190
1191	ll = (struct lance_regs *) dev->base_addr;
1192	esar = (unsigned char *) esar_base;
1193
1194	/* prom checks */
1195	/* First, check for test pattern */
1196	if (esar[0x60] != 0xff && esar[0x64] != 0x00 &&
1197	    esar[0x68] != 0x55 && esar[0x6c] != 0xaa) {
1198		printk(KERN_ERR
1199			"%s: Ethernet station address prom not found!\n",
1200			name);
1201		ret = -ENODEV;
1202		goto err_out_resource;
1203	}
1204	/* Check the prom contents */
1205	for (i = 0; i < 8; i++) {
1206		if (esar[i * 4] != esar[0x3c - i * 4] &&
1207		    esar[i * 4] != esar[0x40 + i * 4] &&
1208		    esar[0x3c - i * 4] != esar[0x40 + i * 4]) {
1209			printk(KERN_ERR "%s: Something is wrong with the "
1210				"ethernet station address prom!\n", name);
1211			ret = -ENODEV;
1212			goto err_out_resource;
1213		}
1214	}
1215
1216	/* Copy the ethernet address to the device structure, later to the
1217	 * lance initialization block so the lance gets it every time it's
1218	 * (re)initialized.
1219	 */
1220	switch (type) {
1221	case ASIC_LANCE:
1222		desc = "IOASIC onboard LANCE";
1223		break;
1224	case PMAD_LANCE:
1225		desc = "PMAD-AA";
1226		break;
1227	case PMAX_LANCE:
1228		desc = "PMAX onboard LANCE";
1229		break;
1230	}
1231	for (i = 0; i < 6; i++)
1232		addr[i] = esar[i * 4];
1233	eth_hw_addr_set(dev, addr);
1234
1235	printk("%s: %s, addr = %pM, irq = %d\n",
1236	       name, desc, dev->dev_addr, dev->irq);
1237
1238	dev->netdev_ops = &lance_netdev_ops;
1239	dev->watchdog_timeo = 5*HZ;
1240
1241	/* lp->ll is the location of the registers for lance card */
1242	lp->ll = ll;
1243
1244	/* busmaster_regval (CSR3) should be zero according to the PMAD-AA
1245	 * specification.
1246	 */
1247	lp->busmaster_regval = 0;
1248
1249	dev->dma = 0;
1250
1251	/* We cannot sleep if the chip is busy during a
1252	 * multicast list update event, because such events
1253	 * can occur from interrupts (ex. IPv6).  So we
1254	 * use a timer to try again later when necessary. -DaveM
1255	 */
1256	lp->dev = dev;
1257	timer_setup(&lp->multicast_timer, lance_set_multicast_retry, 0);
1258
1259
1260	ret = register_netdev(dev);
1261	if (ret) {
1262		printk(KERN_ERR
1263			"%s: Unable to register netdev, aborting.\n", name);
1264		goto err_out_resource;
1265	}
1266
1267	if (!bdev) {
1268		lp->next = root_lance_dev;
1269		root_lance_dev = dev;
1270	}
1271
1272	printk("%s: registered as %s.\n", name, dev->name);
1273	return 0;
1274
1275err_out_resource:
1276	if (bdev)
1277		release_mem_region(start, len);
1278
1279err_out_dev:
1280	free_netdev(dev);
1281
1282err_out:
1283	return ret;
1284}
1285
1286/* Find all the lance cards on the system and initialize them */
1287static int __init dec_lance_platform_probe(void)
1288{
1289	int count = 0;
1290
1291	if (dec_interrupt[DEC_IRQ_LANCE] >= 0) {
1292		if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) {
1293			if (dec_lance_probe(NULL, ASIC_LANCE) >= 0)
1294				count++;
1295		} else if (!TURBOCHANNEL) {
1296			if (dec_lance_probe(NULL, PMAX_LANCE) >= 0)
1297				count++;
1298		}
1299	}
1300
1301	return (count > 0) ? 0 : -ENODEV;
1302}
1303
1304static void __exit dec_lance_platform_remove(void)
1305{
1306	while (root_lance_dev) {
1307		struct net_device *dev = root_lance_dev;
1308		struct lance_private *lp = netdev_priv(dev);
1309
1310		unregister_netdev(dev);
1311		root_lance_dev = lp->next;
1312		free_netdev(dev);
1313	}
1314}
1315
1316#ifdef CONFIG_TC
1317static int dec_lance_tc_probe(struct device *dev);
1318static int dec_lance_tc_remove(struct device *dev);
1319
1320static const struct tc_device_id dec_lance_tc_table[] = {
1321	{ "DEC     ", "PMAD-AA " },
1322	{ }
1323};
1324MODULE_DEVICE_TABLE(tc, dec_lance_tc_table);
1325
1326static struct tc_driver dec_lance_tc_driver = {
1327	.id_table	= dec_lance_tc_table,
1328	.driver		= {
1329		.name	= "declance",
1330		.bus	= &tc_bus_type,
1331		.probe	= dec_lance_tc_probe,
1332		.remove	= dec_lance_tc_remove,
1333	},
1334};
1335
1336static int dec_lance_tc_probe(struct device *dev)
1337{
1338        int status = dec_lance_probe(dev, PMAD_LANCE);
1339        if (!status)
1340                get_device(dev);
1341        return status;
1342}
1343
1344static void dec_lance_remove(struct device *bdev)
1345{
1346	struct net_device *dev = dev_get_drvdata(bdev);
1347	resource_size_t start, len;
1348
1349	unregister_netdev(dev);
1350	start = to_tc_dev(bdev)->resource.start;
1351	len = to_tc_dev(bdev)->resource.end - start + 1;
1352	release_mem_region(start, len);
1353	free_netdev(dev);
1354}
1355
1356static int dec_lance_tc_remove(struct device *dev)
1357{
1358        put_device(dev);
1359        dec_lance_remove(dev);
1360        return 0;
1361}
1362#endif
1363
1364static int __init dec_lance_init(void)
1365{
1366	int status;
1367
1368	status = tc_register_driver(&dec_lance_tc_driver);
1369	if (!status)
1370		dec_lance_platform_probe();
1371	return status;
1372}
1373
1374static void __exit dec_lance_exit(void)
1375{
1376	dec_lance_platform_remove();
1377	tc_unregister_driver(&dec_lance_tc_driver);
1378}
1379
1380
1381module_init(dec_lance_init);
1382module_exit(dec_lance_exit);