Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1379 insertions, 0 deletions

diff --git a/drivers/net/ethernet/amd/declance.c b/drivers/net/ethernet/amd/declance.c
new file mode 100644
index 000000000..9f23703dd
--- /dev/null
+++ b/drivers/net/ethernet/amd/declance.c
@@ -0,0 +1,1379 @@
+/*
+ *    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 const 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;
+	struct net_device	*dev;
+
+	/* 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 netdev_tx_t 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(struct timer_list *t)
+{
+	struct lance_private *lp = from_timer(lp, t, multicast_timer);
+	struct net_device *dev = lp->dev;
+
+	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_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;
+	const char *desc;
+
+	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:
+		desc = "IOASIC onboard LANCE";
+		break;
+	case PMAD_LANCE:
+		desc = "PMAD-AA";
+		break;
+	case PMAX_LANCE:
+		desc = "PMAX onboard LANCE";
+		break;
+	}
+	for (i = 0; i < 6; i++)
+		dev->dev_addr[i] = esar[i * 4];
+
+	printk("%s: %s, addr = %pM, irq = %d\n",
+	       name, desc, 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
+	 */
+	lp->dev = dev;
+	timer_setup(&lp->multicast_timer, lance_set_multicast_retry, 0);
+
+
+	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;
+}
+
+/* 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 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	= 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 void 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);
+}
+
+static int 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);