text: /*
   *    Lance ethernet driver for the MIPS processor based
   *      DECstation family
   *
   *
   *      adopted from sunlance.c by Richard van den Berg
   *
   *      Copyright (C) 2002, 2003, 2005, 2006  Maciej W. Rozycki
   *
   *      additional sources:
   *      - PMAD-AA TURBOchannel Ethernet Module Functional Specification,
   *        Revision 1.2
   *
   *      History:
   *
   *      v0.001: The kernel accepts the code and it shows the hardware address.
   *
   *      v0.002: Removed most sparc stuff, left only some module and dma stuff.
   *
   *      v0.003: Enhanced base address calculation from proposals by
   *              Harald Koerfgen and Thomas Riemer.
   *
   *      v0.004: lance-regs is pointing at the right addresses, added prom
   *              check. First start of address mapping and DMA.
   *
   *      v0.005: started to play around with LANCE-DMA. This driver will not
   *              work for non IOASIC lances. HK
   *
   *      v0.006: added pointer arrays to lance_private and setup routine for
   *              them in dec_lance_init. HK
   *
   *      v0.007: Big shit. The LANCE seems to use a different DMA mechanism to
   *              access the init block. This looks like one (short) word at a
   *              time, but the smallest amount the IOASIC can transfer is a
   *              (long) word. So we have a 2-2 padding here. Changed
   *              lance_init_block accordingly. The 16-16 padding for the buffers
   *              seems to be correct. HK
   *
   *      v0.008: mods to make PMAX_LANCE work. 01/09/1999 triemer
   *
   *      v0.009: Module support fixes, multiple interfaces support, various
   *              bits. macro
   *
   *      v0.010: Fixes for the PMAD mapping of the LANCE buffer and for the
   *              PMAX requirement to only use halfword accesses to the
   *              buffer. macro
   *
   *      v0.011: Converted the PMAD to the driver model. macro
   */
  
  #include <linux/crc32.h>
  #include <linux/delay.h>
  #include <linux/errno.h>
  #include <linux/if_ether.h>
  #include <linux/init.h>
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/netdevice.h>
  #include <linux/etherdevice.h>
  #include <linux/spinlock.h>
  #include <linux/stddef.h>
  #include <linux/string.h>
  #include <linux/tc.h>
  #include <linux/types.h>
  
  #include <asm/addrspace.h>
  
  #include <asm/dec/interrupts.h>
  #include <asm/dec/ioasic.h>
  #include <asm/dec/ioasic_addrs.h>
  #include <asm/dec/kn01.h>
  #include <asm/dec/machtype.h>
  #include <asm/dec/system.h>
  
  static char version[] =
  "declance.c: v0.011 by Linux MIPS DECstation task force\n";
  
  MODULE_AUTHOR("Linux MIPS DECstation task force");
  MODULE_DESCRIPTION("DEC LANCE (DECstation onboard, PMAD-xx) driver");
  MODULE_LICENSE("GPL");
  
  #define __unused __attribute__ ((unused))
  
  /*
   * card types
   */
  #define ASIC_LANCE 1
  #define PMAD_LANCE 2
  #define PMAX_LANCE 3
  
  
  #define LE_CSR0 0
  #define LE_CSR1 1
  #define LE_CSR2 2
  #define LE_CSR3 3
  
  #define LE_MO_PROM      0x8000	/* Enable promiscuous mode */
  
  #define	LE_C0_ERR	0x8000	/* Error: set if BAB, SQE, MISS or ME is set */
  #define	LE_C0_BABL	0x4000	/* BAB:  Babble: tx timeout. */
  #define	LE_C0_CERR	0x2000	/* SQE:  Signal quality error */
  #define	LE_C0_MISS	0x1000	/* MISS: Missed a packet */
  #define	LE_C0_MERR	0x0800	/* ME:   Memory error */
  #define	LE_C0_RINT	0x0400	/* Received interrupt */
  #define	LE_C0_TINT	0x0200	/* Transmitter Interrupt */
  #define	LE_C0_IDON	0x0100	/* IFIN: Init finished. */
  #define	LE_C0_INTR	0x0080	/* Interrupt or error */
  #define	LE_C0_INEA	0x0040	/* Interrupt enable */
  #define	LE_C0_RXON	0x0020	/* Receiver on */
  #define	LE_C0_TXON	0x0010	/* Transmitter on */
  #define	LE_C0_TDMD	0x0008	/* Transmitter demand */
  #define	LE_C0_STOP	0x0004	/* Stop the card */
  #define	LE_C0_STRT	0x0002	/* Start the card */
  #define	LE_C0_INIT	0x0001	/* Init the card */
  
  #define	LE_C3_BSWP	0x4	/* SWAP */
  #define	LE_C3_ACON	0x2	/* ALE Control */
  #define	LE_C3_BCON	0x1	/* Byte control */
  
  /* Receive message descriptor 1 */
  #define LE_R1_OWN	0x8000	/* Who owns the entry */
  #define LE_R1_ERR	0x4000	/* Error: if FRA, OFL, CRC or BUF is set */
  #define LE_R1_FRA	0x2000	/* FRA: Frame error */
  #define LE_R1_OFL	0x1000	/* OFL: Frame overflow */
  #define LE_R1_CRC	0x0800	/* CRC error */
  #define LE_R1_BUF	0x0400	/* BUF: Buffer error */
  #define LE_R1_SOP	0x0200	/* Start of packet */
  #define LE_R1_EOP	0x0100	/* End of packet */
  #define LE_R1_POK	0x0300	/* Packet is complete: SOP + EOP */
  
  /* Transmit message descriptor 1 */
  #define LE_T1_OWN	0x8000	/* Lance owns the packet */
  #define LE_T1_ERR	0x4000	/* Error summary */
  #define LE_T1_EMORE	0x1000	/* Error: more than one retry needed */
  #define LE_T1_EONE	0x0800	/* Error: one retry needed */
  #define LE_T1_EDEF	0x0400	/* Error: deferred */
  #define LE_T1_SOP	0x0200	/* Start of packet */
  #define LE_T1_EOP	0x0100	/* End of packet */
  #define LE_T1_POK	0x0300	/* Packet is complete: SOP + EOP */
  
  #define LE_T3_BUF       0x8000	/* Buffer error */
  #define LE_T3_UFL       0x4000	/* Error underflow */
  #define LE_T3_LCOL      0x1000	/* Error late collision */
  #define LE_T3_CLOS      0x0800	/* Error carrier loss */
  #define LE_T3_RTY       0x0400	/* Error retry */
  #define LE_T3_TDR       0x03ff	/* Time Domain Reflectometry counter */
  
  /* Define: 2^4 Tx buffers and 2^4 Rx buffers */
  
  #ifndef LANCE_LOG_TX_BUFFERS
  #define LANCE_LOG_TX_BUFFERS 4
  #define LANCE_LOG_RX_BUFFERS 4
  #endif
  
  #define TX_RING_SIZE			(1 << (LANCE_LOG_TX_BUFFERS))
  #define TX_RING_MOD_MASK		(TX_RING_SIZE - 1)
  
  #define RX_RING_SIZE			(1 << (LANCE_LOG_RX_BUFFERS))
  #define RX_RING_MOD_MASK		(RX_RING_SIZE - 1)
  
  #define PKT_BUF_SZ		1536
  #define RX_BUFF_SIZE            PKT_BUF_SZ
  #define TX_BUFF_SIZE            PKT_BUF_SZ
  
  #undef TEST_HITS
  #define ZERO 0
  
  /*
   * The DS2100/3100 have a linear 64 kB buffer which supports halfword
   * accesses only.  Each halfword of the buffer is word-aligned in the
   * CPU address space.
   *
   * The PMAD-AA has a 128 kB buffer on-board.
   *
   * The IOASIC LANCE devices use a shared memory region.  This region
   * as seen from the CPU is (max) 128 kB long and has to be on an 128 kB
   * boundary.  The LANCE sees this as a 64 kB long continuous memory
   * region.
   *
   * The LANCE's DMA address is used as an index in this buffer and DMA
   * takes place in bursts of eight 16-bit words which are packed into
   * four 32-bit words by the IOASIC.  This leads to a strange padding:
   * 16 bytes of valid data followed by a 16 byte gap :-(.
   */
  
  struct lance_rx_desc {
  	unsigned short rmd0;		/* low address of packet */
  	unsigned short rmd1;		/* high address of packet
  					   and descriptor bits */
  	short length;			/* 2s complement (negative!)
  					   of buffer length */
  	unsigned short mblength;	/* actual number of bytes received */
  };
  
  struct lance_tx_desc {
  	unsigned short tmd0;		/* low address of packet */
  	unsigned short tmd1;		/* high address of packet
  					   and descriptor bits */
  	short length;			/* 2s complement (negative!)
  					   of buffer length */
  	unsigned short misc;
  };
  
  
  /* First part of the LANCE initialization block, described in databook. */
  struct lance_init_block {
  	unsigned short mode;		/* pre-set mode (reg. 15) */
  
  	unsigned short phys_addr[3];	/* physical ethernet address */
  	unsigned short filter[4];	/* multicast filter */
  
  	/* Receive and transmit ring base, along with extra bits. */
  	unsigned short rx_ptr;		/* receive descriptor addr */
  	unsigned short rx_len;		/* receive len and high addr */
  	unsigned short tx_ptr;		/* transmit descriptor addr */
  	unsigned short tx_len;		/* transmit len and high addr */
  
  	short gap[4];
  
  	/* The buffer descriptors */
  	struct lance_rx_desc brx_ring[RX_RING_SIZE];
  	struct lance_tx_desc btx_ring[TX_RING_SIZE];
  };
  
  #define BUF_OFFSET_CPU sizeof(struct lance_init_block)
  #define BUF_OFFSET_LNC sizeof(struct lance_init_block)
  
  #define shift_off(off, type)						\
  	(type == ASIC_LANCE || type == PMAX_LANCE ? off << 1 : off)
  
  #define lib_off(rt, type)						\
  	shift_off(offsetof(struct lance_init_block, rt), type)
  
  #define lib_ptr(ib, rt, type) 						\
  	((volatile u16 *)((u8 *)(ib) + lib_off(rt, type)))
  
  #define rds_off(rt, type)						\
  	shift_off(offsetof(struct lance_rx_desc, rt), type)
  
  #define rds_ptr(rd, rt, type) 						\
  	((volatile u16 *)((u8 *)(rd) + rds_off(rt, type)))
  
  #define tds_off(rt, type)						\
  	shift_off(offsetof(struct lance_tx_desc, rt), type)
  
  #define tds_ptr(td, rt, type) 						\
  	((volatile u16 *)((u8 *)(td) + tds_off(rt, type)))
  
  struct lance_private {
  	struct net_device *next;
  	int type;
  	int dma_irq;
  	volatile struct lance_regs *ll;
  
  	spinlock_t	lock;
  
  	int rx_new, tx_new;
  	int rx_old, tx_old;
  
  	unsigned short busmaster_regval;
  
  	struct timer_list       multicast_timer;
  
  	/* Pointers to the ring buffers as seen from the CPU */
  	char *rx_buf_ptr_cpu[RX_RING_SIZE];
  	char *tx_buf_ptr_cpu[TX_RING_SIZE];
  
  	/* Pointers to the ring buffers as seen from the LANCE */
  	uint rx_buf_ptr_lnc[RX_RING_SIZE];
  	uint tx_buf_ptr_lnc[TX_RING_SIZE];
  };
  
  #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
  			lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
  			lp->tx_old - lp->tx_new-1)
  
  /* The lance control ports are at an absolute address, machine and tc-slot
   * dependent.
   * DECstations do only 32-bit access and the LANCE uses 16 bit addresses,
   * so we have to give the structure an extra member making rap pointing
   * at the right address
   */
  struct lance_regs {
  	volatile unsigned short rdp;	/* register data port */
  	unsigned short pad;
  	volatile unsigned short rap;	/* register address port */
  };
  
  int dec_lance_debug = 2;
  
  static struct tc_driver dec_lance_tc_driver;
  static struct net_device *root_lance_dev;
  
  static inline void writereg(volatile unsigned short *regptr, short value)
  {
  	*regptr = value;
  	iob();
  }
  
  /* Load the CSR registers */
  static void load_csrs(struct lance_private *lp)
  {
  	volatile struct lance_regs *ll = lp->ll;
  	uint leptr;
  
  	/* The address space as seen from the LANCE
  	 * begins at address 0. HK
  	 */
  	leptr = 0;
  
  	writereg(&ll->rap, LE_CSR1);
  	writereg(&ll->rdp, (leptr & 0xFFFF));
  	writereg(&ll->rap, LE_CSR2);
  	writereg(&ll->rdp, leptr >> 16);
  	writereg(&ll->rap, LE_CSR3);
  	writereg(&ll->rdp, lp->busmaster_regval);
  
  	/* Point back to csr0 */
  	writereg(&ll->rap, LE_CSR0);
  }
  
  /*
   * Our specialized copy routines
   *
   */
  static void cp_to_buf(const int type, void *to, const void *from, int len)
  {
  	unsigned short *tp;
  	const unsigned short *fp;
  	unsigned short clen;
  	unsigned char *rtp;
  	const unsigned char *rfp;
  
  	if (type == PMAD_LANCE) {
  		memcpy(to, from, len);
  	} else if (type == PMAX_LANCE) {
  		clen = len >> 1;
  		tp = to;
  		fp = from;
  
  		while (clen--) {
  			*tp++ = *fp++;
  			tp++;
  		}
  
  		clen = len & 1;
  		rtp = (unsigned char *)tp;
  		rfp = (const unsigned char *)fp;
  		while (clen--) {
  			*rtp++ = *rfp++;
  		}
  	} else {
  		/*
  		 * copy 16 Byte chunks
  		 */
  		clen = len >> 4;
  		tp = to;
  		fp = from;
  		while (clen--) {
  			*tp++ = *fp++;
  			*tp++ = *fp++;
  			*tp++ = *fp++;
  			*tp++ = *fp++;
  			*tp++ = *fp++;
  			*tp++ = *fp++;
  			*tp++ = *fp++;
  			*tp++ = *fp++;
  			tp += 8;
  		}
  
  		/*
  		 * do the rest, if any.
  		 */
  		clen = len & 15;
  		rtp = (unsigned char *)tp;
  		rfp = (const unsigned char *)fp;
  		while (clen--) {
  			*rtp++ = *rfp++;
  		}
  	}
  
  	iob();
  }
  
  static void cp_from_buf(const int type, void *to, const void *from, int len)
  {
  	unsigned short *tp;
  	const unsigned short *fp;
  	unsigned short clen;
  	unsigned char *rtp;
  	const unsigned char *rfp;
  
  	if (type == PMAD_LANCE) {
  		memcpy(to, from, len);
  	} else if (type == PMAX_LANCE) {
  		clen = len >> 1;
  		tp = to;
  		fp = from;
  		while (clen--) {
  			*tp++ = *fp++;
  			fp++;
  		}
  
  		clen = len & 1;
  
  		rtp = (unsigned char *)tp;
  		rfp = (const unsigned char *)fp;
  
  		while (clen--) {
  			*rtp++ = *rfp++;
  		}
  	} else {
  
  		/*
  		 * copy 16 Byte chunks
  		 */
  		clen = len >> 4;
  		tp = to;
  		fp = from;
  		while (clen--) {
  			*tp++ = *fp++;
  			*tp++ = *fp++;
  			*tp++ = *fp++;
  			*tp++ = *fp++;
  			*tp++ = *fp++;
  			*tp++ = *fp++;
  			*tp++ = *fp++;
  			*tp++ = *fp++;
  			fp += 8;
  		}
  
  		/*
  		 * do the rest, if any.
  		 */
  		clen = len & 15;
  		rtp = (unsigned char *)tp;
  		rfp = (const unsigned char *)fp;
  		while (clen--) {
  			*rtp++ = *rfp++;
  		}
  
  
  	}
  
  }
  
  /* Setup the Lance Rx and Tx rings */
  static void lance_init_ring(struct net_device *dev)
  {
  	struct lance_private *lp = netdev_priv(dev);
  	volatile u16 *ib = (volatile u16 *)dev->mem_start;
  	uint leptr;
  	int i;
  
  	/* Lock out other processes while setting up hardware */
  	netif_stop_queue(dev);
  	lp->rx_new = lp->tx_new = 0;
  	lp->rx_old = lp->tx_old = 0;
  
  	/* Copy the ethernet address to the lance init block.
  	 * XXX bit 0 of the physical address registers has to be zero
  	 */
  	*lib_ptr(ib, phys_addr[0], lp->type) = (dev->dev_addr[1] << 8) |
  				     dev->dev_addr[0];
  	*lib_ptr(ib, phys_addr[1], lp->type) = (dev->dev_addr[3] << 8) |
  				     dev->dev_addr[2];
  	*lib_ptr(ib, phys_addr[2], lp->type) = (dev->dev_addr[5] << 8) |
  				     dev->dev_addr[4];
  	/* Setup the initialization block */
  
  	/* Setup rx descriptor pointer */
  	leptr = offsetof(struct lance_init_block, brx_ring);
  	*lib_ptr(ib, rx_len, lp->type) = (LANCE_LOG_RX_BUFFERS << 13) |
  					 (leptr >> 16);
  	*lib_ptr(ib, rx_ptr, lp->type) = leptr;
  	if (ZERO)
  		printk("RX ptr: %8.8x(%8.8x)\n",
  		       leptr, (uint)lib_off(brx_ring, lp->type));
  
  	/* Setup tx descriptor pointer */
  	leptr = offsetof(struct lance_init_block, btx_ring);
  	*lib_ptr(ib, tx_len, lp->type) = (LANCE_LOG_TX_BUFFERS << 13) |
  					 (leptr >> 16);
  	*lib_ptr(ib, tx_ptr, lp->type) = leptr;
  	if (ZERO)
  		printk("TX ptr: %8.8x(%8.8x)\n",
  		       leptr, (uint)lib_off(btx_ring, lp->type));
  
  	if (ZERO)
  		printk("TX rings:\n");
  
  	/* Setup the Tx ring entries */
  	for (i = 0; i < TX_RING_SIZE; i++) {
  		leptr = lp->tx_buf_ptr_lnc[i];
  		*lib_ptr(ib, btx_ring[i].tmd0, lp->type) = leptr;
  		*lib_ptr(ib, btx_ring[i].tmd1, lp->type) = (leptr >> 16) &
  							   0xff;
  		*lib_ptr(ib, btx_ring[i].length, lp->type) = 0xf000;
  						/* The ones required by tmd2 */
  		*lib_ptr(ib, btx_ring[i].misc, lp->type) = 0;
  		if (i < 3 && ZERO)
  			printk("%d: %8.8x(%p)\n",
  			       i, leptr, lp->tx_buf_ptr_cpu[i]);
  	}
  
  	/* Setup the Rx ring entries */
  	if (ZERO)
  		printk("RX rings:\n");
  	for (i = 0; i < RX_RING_SIZE; i++) {
  		leptr = lp->rx_buf_ptr_lnc[i];
  		*lib_ptr(ib, brx_ring[i].rmd0, lp->type) = leptr;
  		*lib_ptr(ib, brx_ring[i].rmd1, lp->type) = ((leptr >> 16) &
  							    0xff) |
  							   LE_R1_OWN;
  		*lib_ptr(ib, brx_ring[i].length, lp->type) = -RX_BUFF_SIZE |
  							     0xf000;
  		*lib_ptr(ib, brx_ring[i].mblength, lp->type) = 0;
  		if (i < 3 && ZERO)
  			printk("%d: %8.8x(%p)\n",
  			       i, leptr, lp->rx_buf_ptr_cpu[i]);
  	}
  	iob();
  }
  
  static int init_restart_lance(struct lance_private *lp)
  {
  	volatile struct lance_regs *ll = lp->ll;
  	int i;
  
  	writereg(&ll->rap, LE_CSR0);
  	writereg(&ll->rdp, LE_C0_INIT);
  
  	/* Wait for the lance to complete initialization */
  	for (i = 0; (i < 100) && !(ll->rdp & LE_C0_IDON); i++) {
  		udelay(10);
  	}
  	if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
  		printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
  		       i, ll->rdp);
  		return -1;
  	}
  	if ((ll->rdp & LE_C0_ERR)) {
  		printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
  		       i, ll->rdp);
  		return -1;
  	}
  	writereg(&ll->rdp, LE_C0_IDON);
  	writereg(&ll->rdp, LE_C0_STRT);
  	writereg(&ll->rdp, LE_C0_INEA);
  
  	return 0;
  }
  
  static int lance_rx(struct net_device *dev)
  {
  	struct lance_private *lp = netdev_priv(dev);
  	volatile u16 *ib = (volatile u16 *)dev->mem_start;
  	volatile u16 *rd;
  	unsigned short bits;
  	int entry, len;
  	struct sk_buff *skb;
  
  #ifdef TEST_HITS
  	{
  		int i;
  
  		printk("[");
  		for (i = 0; i < RX_RING_SIZE; i++) {
  			if (i == lp->rx_new)
  				printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
  						      lp->type) &
  					     LE_R1_OWN ? "_" : "X");
  			else
  				printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
  						      lp->type) &
  					     LE_R1_OWN ? "." : "1");
  		}
  		printk("]");
  	}
  #endif
  
  	for (rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type);
  	     !((bits = *rds_ptr(rd, rmd1, lp->type)) & LE_R1_OWN);
  	     rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type)) {
  		entry = lp->rx_new;
  
  		/* We got an incomplete frame? */
  		if ((bits & LE_R1_POK) != LE_R1_POK) {
  			dev->stats.rx_over_errors++;
  			dev->stats.rx_errors++;
  		} else if (bits & LE_R1_ERR) {
  			/* Count only the end frame as a rx error,
  			 * not the beginning
  			 */
  			if (bits & LE_R1_BUF)
  				dev->stats.rx_fifo_errors++;
  			if (bits & LE_R1_CRC)
  				dev->stats.rx_crc_errors++;
  			if (bits & LE_R1_OFL)
  				dev->stats.rx_over_errors++;
  			if (bits & LE_R1_FRA)
  				dev->stats.rx_frame_errors++;
  			if (bits & LE_R1_EOP)
  				dev->stats.rx_errors++;
  		} else {
  			len = (*rds_ptr(rd, mblength, lp->type) & 0xfff) - 4;
  			skb = netdev_alloc_skb(dev, len + 2);
  
  			if (skb == 0) {
  				dev->stats.rx_dropped++;
  				*rds_ptr(rd, mblength, lp->type) = 0;
  				*rds_ptr(rd, rmd1, lp->type) =
  					((lp->rx_buf_ptr_lnc[entry] >> 16) &
  					 0xff) | LE_R1_OWN;
  				lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
  				return 0;
  			}
  			dev->stats.rx_bytes += len;
  
  			skb_reserve(skb, 2);	/* 16 byte align */
  			skb_put(skb, len);	/* make room */
  
  			cp_from_buf(lp->type, skb->data,
  				    lp->rx_buf_ptr_cpu[entry], len);
  
  			skb->protocol = eth_type_trans(skb, dev);
  			netif_rx(skb);
  			dev->stats.rx_packets++;
  		}
  
  		/* Return the packet to the pool */
  		*rds_ptr(rd, mblength, lp->type) = 0;
  		*rds_ptr(rd, length, lp->type) = -RX_BUFF_SIZE | 0xf000;
  		*rds_ptr(rd, rmd1, lp->type) =
  			((lp->rx_buf_ptr_lnc[entry] >> 16) & 0xff) | LE_R1_OWN;
  		lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
  	}
  	return 0;
  }
  
  static void lance_tx(struct net_device *dev)
  {
  	struct lance_private *lp = netdev_priv(dev);
  	volatile u16 *ib = (volatile u16 *)dev->mem_start;
  	volatile struct lance_regs *ll = lp->ll;
  	volatile u16 *td;
  	int i, j;
  	int status;
  
  	j = lp->tx_old;
  
  	spin_lock(&lp->lock);
  
  	for (i = j; i != lp->tx_new; i = j) {
  		td = lib_ptr(ib, btx_ring[i], lp->type);
  		/* If we hit a packet not owned by us, stop */
  		if (*tds_ptr(td, tmd1, lp->type) & LE_T1_OWN)
  			break;
  
  		if (*tds_ptr(td, tmd1, lp->type) & LE_T1_ERR) {
  			status = *tds_ptr(td, misc, lp->type);
  
  			dev->stats.tx_errors++;
  			if (status & LE_T3_RTY)
  				dev->stats.tx_aborted_errors++;
  			if (status & LE_T3_LCOL)
  				dev->stats.tx_window_errors++;
  
  			if (status & LE_T3_CLOS) {
  				dev->stats.tx_carrier_errors++;
  				printk("%s: Carrier Lost\n", dev->name);
  				/* Stop the lance */
  				writereg(&ll->rap, LE_CSR0);
  				writereg(&ll->rdp, LE_C0_STOP);
  				lance_init_ring(dev);
  				load_csrs(lp);
  				init_restart_lance(lp);
  				goto out;
  			}
  			/* Buffer errors and underflows turn off the
  			 * transmitter, restart the adapter.
  			 */
  			if (status & (LE_T3_BUF | LE_T3_UFL)) {
  				dev->stats.tx_fifo_errors++;
  
  				printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
  				       dev->name);
  				/* Stop the lance */
  				writereg(&ll->rap, LE_CSR0);
  				writereg(&ll->rdp, LE_C0_STOP);
  				lance_init_ring(dev);
  				load_csrs(lp);
  				init_restart_lance(lp);
  				goto out;
  			}
  		} else if ((*tds_ptr(td, tmd1, lp->type) & LE_T1_POK) ==
  			   LE_T1_POK) {
  			/*
  			 * So we don't count the packet more than once.
  			 */
  			*tds_ptr(td, tmd1, lp->type) &= ~(LE_T1_POK);
  
  			/* One collision before packet was sent. */
  			if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EONE)
  				dev->stats.collisions++;
  
  			/* More than one collision, be optimistic. */
  			if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EMORE)
  				dev->stats.collisions += 2;
  
  			dev->stats.tx_packets++;
  		}
  		j = (j + 1) & TX_RING_MOD_MASK;
  	}
  	lp->tx_old = j;
  out:
  	if (netif_queue_stopped(dev) &&
  	    TX_BUFFS_AVAIL > 0)
  		netif_wake_queue(dev);
  
  	spin_unlock(&lp->lock);
  }
  
  static irqreturn_t lance_dma_merr_int(int irq, void *dev_id)
  {
  	struct net_device *dev = dev_id;
  
  	printk(KERN_ERR "%s: DMA error\n", dev->name);
  	return IRQ_HANDLED;
  }
  
  static irqreturn_t lance_interrupt(int irq, void *dev_id)
  {
  	struct net_device *dev = dev_id;
  	struct lance_private *lp = netdev_priv(dev);
  	volatile struct lance_regs *ll = lp->ll;
  	int csr0;
  
  	writereg(&ll->rap, LE_CSR0);
  	csr0 = ll->rdp;
  
  	/* Acknowledge all the interrupt sources ASAP */
  	writereg(&ll->rdp, csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT));
  
  	if ((csr0 & LE_C0_ERR)) {
  		/* Clear the error condition */
  		writereg(&ll->rdp, LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
  			 LE_C0_CERR | LE_C0_MERR);
  	}
  	if (csr0 & LE_C0_RINT)
  		lance_rx(dev);
  
  	if (csr0 & LE_C0_TINT)
  		lance_tx(dev);
  
  	if (csr0 & LE_C0_BABL)
  		dev->stats.tx_errors++;
  
  	if (csr0 & LE_C0_MISS)
  		dev->stats.rx_errors++;
  
  	if (csr0 & LE_C0_MERR) {
  		printk("%s: Memory error, status %04x\n", dev->name, csr0);
  
  		writereg(&ll->rdp, LE_C0_STOP);
  
  		lance_init_ring(dev);
  		load_csrs(lp);
  		init_restart_lance(lp);
  		netif_wake_queue(dev);
  	}
  
  	writereg(&ll->rdp, LE_C0_INEA);
  	writereg(&ll->rdp, LE_C0_INEA);
  	return IRQ_HANDLED;
  }
  
  static int lance_open(struct net_device *dev)
  {
  	volatile u16 *ib = (volatile u16 *)dev->mem_start;
  	struct lance_private *lp = netdev_priv(dev);
  	volatile struct lance_regs *ll = lp->ll;
  	int status = 0;
  
  	/* Stop the Lance */
  	writereg(&ll->rap, LE_CSR0);
  	writereg(&ll->rdp, LE_C0_STOP);
  
  	/* Set mode and clear multicast filter only at device open,
  	 * so that lance_init_ring() called at any error will not
  	 * forget multicast filters.
  	 *
  	 * BTW it is common bug in all lance drivers! --ANK
  	 */
  	*lib_ptr(ib, mode, lp->type) = 0;
  	*lib_ptr(ib, filter[0], lp->type) = 0;
  	*lib_ptr(ib, filter[1], lp->type) = 0;
  	*lib_ptr(ib, filter[2], lp->type) = 0;
  	*lib_ptr(ib, filter[3], lp->type) = 0;
  
  	lance_init_ring(dev);
  	load_csrs(lp);
  
  	netif_start_queue(dev);
  
  	/* Associate IRQ with lance_interrupt */
  	if (request_irq(dev->irq, lance_interrupt, 0, "lance", dev)) {
  		printk("%s: Can't get IRQ %d\n", dev->name, dev->irq);
  		return -EAGAIN;
  	}
  	if (lp->dma_irq >= 0) {
  		unsigned long flags;
  
  		if (request_irq(lp->dma_irq, lance_dma_merr_int, IRQF_ONESHOT,
  				"lance error", dev)) {
  			free_irq(dev->irq, dev);
  			printk("%s: Can't get DMA IRQ %d\n", dev->name,
  				lp->dma_irq);
  			return -EAGAIN;
  		}
  
  		spin_lock_irqsave(&ioasic_ssr_lock, flags);
  
  		fast_mb();
  		/* Enable I/O ASIC LANCE DMA.  */
  		ioasic_write(IO_REG_SSR,
  			     ioasic_read(IO_REG_SSR) | IO_SSR_LANCE_DMA_EN);
  
  		fast_mb();
  		spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
  	}
  
  	status = init_restart_lance(lp);
  	return status;
  }
  
  static int lance_close(struct net_device *dev)
  {
  	struct lance_private *lp = netdev_priv(dev);
  	volatile struct lance_regs *ll = lp->ll;
  
  	netif_stop_queue(dev);
  	del_timer_sync(&lp->multicast_timer);
  
  	/* Stop the card */
  	writereg(&ll->rap, LE_CSR0);
  	writereg(&ll->rdp, LE_C0_STOP);
  
  	if (lp->dma_irq >= 0) {
  		unsigned long flags;
  
  		spin_lock_irqsave(&ioasic_ssr_lock, flags);
  
  		fast_mb();
  		/* Disable I/O ASIC LANCE DMA.  */
  		ioasic_write(IO_REG_SSR,
  			     ioasic_read(IO_REG_SSR) & ~IO_SSR_LANCE_DMA_EN);
  
  		fast_iob();
  		spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
  
  		free_irq(lp->dma_irq, dev);
  	}
  	free_irq(dev->irq, dev);
  	return 0;
  }
  
  static inline int lance_reset(struct net_device *dev)
  {
  	struct lance_private *lp = netdev_priv(dev);
  	volatile struct lance_regs *ll = lp->ll;
  	int status;
  
  	/* Stop the lance */
  	writereg(&ll->rap, LE_CSR0);
  	writereg(&ll->rdp, LE_C0_STOP);
  
  	lance_init_ring(dev);
  	load_csrs(lp);
  	netif_trans_update(dev); /* prevent tx timeout */
  	status = init_restart_lance(lp);
  	return status;
  }
  
  static void lance_tx_timeout(struct net_device *dev)
  {
  	struct lance_private *lp = netdev_priv(dev);
  	volatile struct lance_regs *ll = lp->ll;
  
  	printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
  		dev->name, ll->rdp);
  	lance_reset(dev);
  	netif_wake_queue(dev);
  }
  
  static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
  {
  	struct lance_private *lp = netdev_priv(dev);
  	volatile struct lance_regs *ll = lp->ll;
  	volatile u16 *ib = (volatile u16 *)dev->mem_start;
  	unsigned long flags;
  	int entry, len;
  
  	len = skb->len;
  
  	if (len < ETH_ZLEN) {
  		if (skb_padto(skb, ETH_ZLEN))
  			return NETDEV_TX_OK;
  		len = ETH_ZLEN;
  	}
  
  	dev->stats.tx_bytes += len;
  
  	spin_lock_irqsave(&lp->lock, flags);
  
  	entry = lp->tx_new;
  	*lib_ptr(ib, btx_ring[entry].length, lp->type) = (-len);
  	*lib_ptr(ib, btx_ring[entry].misc, lp->type) = 0;
  
  	cp_to_buf(lp->type, lp->tx_buf_ptr_cpu[entry], skb->data, len);
  
  	/* Now, give the packet to the lance */
  	*lib_ptr(ib, btx_ring[entry].tmd1, lp->type) =
  		((lp->tx_buf_ptr_lnc[entry] >> 16) & 0xff) |
  		(LE_T1_POK | LE_T1_OWN);
  	lp->tx_new = (entry + 1) & TX_RING_MOD_MASK;
  
  	if (TX_BUFFS_AVAIL <= 0)
  		netif_stop_queue(dev);
  
  	/* Kick the lance: transmit now */
  	writereg(&ll->rdp, LE_C0_INEA | LE_C0_TDMD);
  
  	spin_unlock_irqrestore(&lp->lock, flags);
  
  	dev_kfree_skb(skb);
  
   	return NETDEV_TX_OK;
  }
  
  static void lance_load_multicast(struct net_device *dev)
  {
  	struct lance_private *lp = netdev_priv(dev);
  	volatile u16 *ib = (volatile u16 *)dev->mem_start;
  	struct netdev_hw_addr *ha;
  	u32 crc;
  
  	/* set all multicast bits */
  	if (dev->flags & IFF_ALLMULTI) {
  		*lib_ptr(ib, filter[0], lp->type) = 0xffff;
  		*lib_ptr(ib, filter[1], lp->type) = 0xffff;
  		*lib_ptr(ib, filter[2], lp->type) = 0xffff;
  		*lib_ptr(ib, filter[3], lp->type) = 0xffff;
  		return;
  	}
  	/* clear the multicast filter */
  	*lib_ptr(ib, filter[0], lp->type) = 0;
  	*lib_ptr(ib, filter[1], lp->type) = 0;
  	*lib_ptr(ib, filter[2], lp->type) = 0;
  	*lib_ptr(ib, filter[3], lp->type) = 0;
  
  	/* Add addresses */
  	netdev_for_each_mc_addr(ha, dev) {
  		crc = ether_crc_le(ETH_ALEN, ha->addr);
  		crc = crc >> 26;
  		*lib_ptr(ib, filter[crc >> 4], lp->type) |= 1 << (crc & 0xf);
  	}
  }
  
  static void lance_set_multicast(struct net_device *dev)
  {
  	struct lance_private *lp = netdev_priv(dev);
  	volatile u16 *ib = (volatile u16 *)dev->mem_start;
  	volatile struct lance_regs *ll = lp->ll;
  
  	if (!netif_running(dev))
  		return;
  
  	if (lp->tx_old != lp->tx_new) {
  		mod_timer(&lp->multicast_timer, jiffies + 4 * HZ/100);
  		netif_wake_queue(dev);
  		return;
  	}
  
  	netif_stop_queue(dev);
  
  	writereg(&ll->rap, LE_CSR0);
  	writereg(&ll->rdp, LE_C0_STOP);
  
  	lance_init_ring(dev);
  
  	if (dev->flags & IFF_PROMISC) {
  		*lib_ptr(ib, mode, lp->type) |= LE_MO_PROM;
  	} else {
  		*lib_ptr(ib, mode, lp->type) &= ~LE_MO_PROM;
  		lance_load_multicast(dev);
  	}
  	load_csrs(lp);
  	init_restart_lance(lp);
  	netif_wake_queue(dev);
  }
  
  static void lance_set_multicast_retry(unsigned long _opaque)
  {
  	struct net_device *dev = (struct net_device *) _opaque;
  
  	lance_set_multicast(dev);
  }
  
  static const struct net_device_ops lance_netdev_ops = {
  	.ndo_open		= lance_open,
  	.ndo_stop		= lance_close,
  	.ndo_start_xmit		= lance_start_xmit,
  	.ndo_tx_timeout		= lance_tx_timeout,
  	.ndo_set_rx_mode	= lance_set_multicast,
  	.ndo_change_mtu		= eth_change_mtu,
  	.ndo_validate_addr	= eth_validate_addr,
  	.ndo_set_mac_address	= eth_mac_addr,
  };
  
  static int dec_lance_probe(struct device *bdev, const int type)
  {
  	static unsigned version_printed;
  	static const char fmt[] = "declance%d";
  	char name[10];
  	struct net_device *dev;
  	struct lance_private *lp;
  	volatile struct lance_regs *ll;
  	resource_size_t start = 0, len = 0;
  	int i, ret;
  	unsigned long esar_base;
  	unsigned char *esar;
  
  	if (dec_lance_debug && version_printed++ == 0)
  		printk(version);
  
  	if (bdev)
  		snprintf(name, sizeof(name), "%s", dev_name(bdev));
  	else {
  		i = 0;
  		dev = root_lance_dev;
  		while (dev) {
  			i++;
  			lp = netdev_priv(dev);
  			dev = lp->next;
  		}
  		snprintf(name, sizeof(name), fmt, i);
  	}
  
  	dev = alloc_etherdev(sizeof(struct lance_private));
  	if (!dev) {
  		ret = -ENOMEM;
  		goto err_out;
  	}
  
  	/*
  	 * alloc_etherdev ensures the data structures used by the LANCE
  	 * are aligned.
  	 */
  	lp = netdev_priv(dev);
  	spin_lock_init(&lp->lock);
  
  	lp->type = type;
  	switch (type) {
  	case ASIC_LANCE:
  		dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE);
  
  		/* buffer space for the on-board LANCE shared memory */
  		/*
  		 * FIXME: ugly hack!
  		 */
  		dev->mem_start = CKSEG1ADDR(0x00020000);
  		dev->mem_end = dev->mem_start + 0x00020000;
  		dev->irq = dec_interrupt[DEC_IRQ_LANCE];
  		esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_ESAR);
  
  		/* Workaround crash with booting KN04 2.1k from Disk */
  		memset((void *)dev->mem_start, 0,
  		       dev->mem_end - dev->mem_start);
  
  		/*
  		 * setup the pointer arrays, this sucks [tm] :-(
  		 */
  		for (i = 0; i < RX_RING_SIZE; i++) {
  			lp->rx_buf_ptr_cpu[i] =
  				(char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
  					 2 * i * RX_BUFF_SIZE);
  			lp->rx_buf_ptr_lnc[i] =
  				(BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
  		}
  		for (i = 0; i < TX_RING_SIZE; i++) {
  			lp->tx_buf_ptr_cpu[i] =
  				(char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
  					 2 * RX_RING_SIZE * RX_BUFF_SIZE +
  					 2 * i * TX_BUFF_SIZE);
  			lp->tx_buf_ptr_lnc[i] =
  				(BUF_OFFSET_LNC +
  				 RX_RING_SIZE * RX_BUFF_SIZE +
  				 i * TX_BUFF_SIZE);
  		}
  
  		/* Setup I/O ASIC LANCE DMA.  */
  		lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR];
  		ioasic_write(IO_REG_LANCE_DMA_P,
  			     CPHYSADDR(dev->mem_start) << 3);
  
  		break;
  #ifdef CONFIG_TC
  	case PMAD_LANCE:
  		dev_set_drvdata(bdev, dev);
  
  		start = to_tc_dev(bdev)->resource.start;
  		len = to_tc_dev(bdev)->resource.end - start + 1;
  		if (!request_mem_region(start, len, dev_name(bdev))) {
  			printk(KERN_ERR
  			       "%s: Unable to reserve MMIO resource\n",
  			       dev_name(bdev));
  			ret = -EBUSY;
  			goto err_out_dev;
  		}
  
  		dev->mem_start = CKSEG1ADDR(start);
  		dev->mem_end = dev->mem_start + 0x100000;
  		dev->base_addr = dev->mem_start + 0x100000;
  		dev->irq = to_tc_dev(bdev)->interrupt;
  		esar_base = dev->mem_start + 0x1c0002;
  		lp->dma_irq = -1;
  
  		for (i = 0; i < RX_RING_SIZE; i++) {
  			lp->rx_buf_ptr_cpu[i] =
  				(char *)(dev->mem_start + BUF_OFFSET_CPU +
  					 i * RX_BUFF_SIZE);
  			lp->rx_buf_ptr_lnc[i] =
  				(BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
  		}
  		for (i = 0; i < TX_RING_SIZE; i++) {
  			lp->tx_buf_ptr_cpu[i] =
  				(char *)(dev->mem_start + BUF_OFFSET_CPU +
  					 RX_RING_SIZE * RX_BUFF_SIZE +
  					 i * TX_BUFF_SIZE);
  			lp->tx_buf_ptr_lnc[i] =
  				(BUF_OFFSET_LNC +
  				 RX_RING_SIZE * RX_BUFF_SIZE +
  				 i * TX_BUFF_SIZE);
  		}
  
  		break;
  #endif
  	case PMAX_LANCE:
  		dev->irq = dec_interrupt[DEC_IRQ_LANCE];
  		dev->base_addr = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE);
  		dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM);
  		dev->mem_end = dev->mem_start + KN01_SLOT_SIZE;
  		esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 1);
  		lp->dma_irq = -1;
  
  		/*
  		 * setup the pointer arrays, this sucks [tm] :-(
  		 */
  		for (i = 0; i < RX_RING_SIZE; i++) {
  			lp->rx_buf_ptr_cpu[i] =
  				(char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
  					 2 * i * RX_BUFF_SIZE);
  			lp->rx_buf_ptr_lnc[i] =
  				(BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
  		}
  		for (i = 0; i < TX_RING_SIZE; i++) {
  			lp->tx_buf_ptr_cpu[i] =
  				(char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
  					 2 * RX_RING_SIZE * RX_BUFF_SIZE +
  					 2 * i * TX_BUFF_SIZE);
  			lp->tx_buf_ptr_lnc[i] =
  				(BUF_OFFSET_LNC +
  				 RX_RING_SIZE * RX_BUFF_SIZE +
  				 i * TX_BUFF_SIZE);
  		}
  
  		break;
  
  	default:
  		printk(KERN_ERR "%s: declance_init called with unknown type\n",
  			name);
  		ret = -ENODEV;
  		goto err_out_dev;
  	}
  
  	ll = (struct lance_regs *) dev->base_addr;
  	esar = (unsigned char *) esar_base;
  
  	/* prom checks */
  	/* First, check for test pattern */
  	if (esar[0x60] != 0xff && esar[0x64] != 0x00 &&
  	    esar[0x68] != 0x55 && esar[0x6c] != 0xaa) {
  		printk(KERN_ERR
  			"%s: Ethernet station address prom not found!\n",
  			name);
  		ret = -ENODEV;
  		goto err_out_resource;
  	}
  	/* Check the prom contents */
  	for (i = 0; i < 8; i++) {
  		if (esar[i * 4] != esar[0x3c - i * 4] &&
  		    esar[i * 4] != esar[0x40 + i * 4] &&
  		    esar[0x3c - i * 4] != esar[0x40 + i * 4]) {
  			printk(KERN_ERR "%s: Something is wrong with the "
  				"ethernet station address prom!\n", name);
  			ret = -ENODEV;
  			goto err_out_resource;
  		}
  	}
  
  	/* Copy the ethernet address to the device structure, later to the
  	 * lance initialization block so the lance gets it every time it's
  	 * (re)initialized.
  	 */
  	switch (type) {
  	case ASIC_LANCE:
  		printk("%s: IOASIC onboard LANCE", name);
  		break;
  	case PMAD_LANCE:
  		printk("%s: PMAD-AA", name);
  		break;
  	case PMAX_LANCE:
  		printk("%s: PMAX onboard LANCE", name);
  		break;
  	}
  	for (i = 0; i < 6; i++)
  		dev->dev_addr[i] = esar[i * 4];
  
  	printk(", addr = %pM, irq = %d\n", dev->dev_addr, dev->irq);
  
  	dev->netdev_ops = &lance_netdev_ops;
  	dev->watchdog_timeo = 5*HZ;
  
  	/* lp->ll is the location of the registers for lance card */
  	lp->ll = ll;
  
  	/* busmaster_regval (CSR3) should be zero according to the PMAD-AA
  	 * specification.
  	 */
  	lp->busmaster_regval = 0;
  
  	dev->dma = 0;
  
  	/* We cannot sleep if the chip is busy during a
  	 * multicast list update event, because such events
  	 * can occur from interrupts (ex. IPv6).  So we
  	 * use a timer to try again later when necessary. -DaveM
  	 */
  	init_timer(&lp->multicast_timer);
  	lp->multicast_timer.data = (unsigned long) dev;
  	lp->multicast_timer.function = lance_set_multicast_retry;
  
  	ret = register_netdev(dev);
  	if (ret) {
  		printk(KERN_ERR
  			"%s: Unable to register netdev, aborting.\n", name);
  		goto err_out_resource;
  	}
  
  	if (!bdev) {
  		lp->next = root_lance_dev;
  		root_lance_dev = dev;
  	}
  
  	printk("%s: registered as %s.\n", name, dev->name);
  	return 0;
  
  err_out_resource:
  	if (bdev)
  		release_mem_region(start, len);
  
  err_out_dev:
  	free_netdev(dev);
  
  err_out:
  	return ret;
  }
  
  static void __exit dec_lance_remove(struct device *bdev)
  {
  	struct net_device *dev = dev_get_drvdata(bdev);
  	resource_size_t start, len;
  
  	unregister_netdev(dev);
  	start = to_tc_dev(bdev)->resource.start;
  	len = to_tc_dev(bdev)->resource.end - start + 1;
  	release_mem_region(start, len);
  	free_netdev(dev);
  }
  
  /* Find all the lance cards on the system and initialize them */
  static int __init dec_lance_platform_probe(void)
  {
  	int count = 0;
  
  	if (dec_interrupt[DEC_IRQ_LANCE] >= 0) {
  		if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) {
  			if (dec_lance_probe(NULL, ASIC_LANCE) >= 0)
  				count++;
  		} else if (!TURBOCHANNEL) {
  			if (dec_lance_probe(NULL, PMAX_LANCE) >= 0)
  				count++;
  		}
  	}
  
  	return (count > 0) ? 0 : -ENODEV;
  }
  
  static void __exit dec_lance_platform_remove(void)
  {
  	while (root_lance_dev) {
  		struct net_device *dev = root_lance_dev;
  		struct lance_private *lp = netdev_priv(dev);
  
  		unregister_netdev(dev);
  		root_lance_dev = lp->next;
  		free_netdev(dev);
  	}
  }
  
  #ifdef CONFIG_TC
  static int dec_lance_tc_probe(struct device *dev);
  static int __exit dec_lance_tc_remove(struct device *dev);
  
  static const struct tc_device_id dec_lance_tc_table[] = {
  	{ "DEC     ", "PMAD-AA " },
  	{ }
  };
  MODULE_DEVICE_TABLE(tc, dec_lance_tc_table);
  
  static struct tc_driver dec_lance_tc_driver = {
  	.id_table	= dec_lance_tc_table,
  	.driver		= {
  		.name	= "declance",
  		.bus	= &tc_bus_type,
  		.probe	= dec_lance_tc_probe,
  		.remove	= __exit_p(dec_lance_tc_remove),
  	},
  };
  
  static int dec_lance_tc_probe(struct device *dev)
  {
          int status = dec_lance_probe(dev, PMAD_LANCE);
          if (!status)
                  get_device(dev);
          return status;
  }
  
  static int __exit dec_lance_tc_remove(struct device *dev)
  {
          put_device(dev);
          dec_lance_remove(dev);
          return 0;
  }
  #endif
  
  static int __init dec_lance_init(void)
  {
  	int status;
  
  	status = tc_register_driver(&dec_lance_tc_driver);
  	if (!status)
  		dec_lance_platform_probe();
  	return status;
  }
  
  static void __exit dec_lance_exit(void)
  {
  	dec_lance_platform_remove();
  	tc_unregister_driver(&dec_lance_tc_driver);
  }
  
  
  module_init(dec_lance_init);
  module_exit(dec_lance_exit);
  