text: /*
   * Amiga Linux/68k A2065 Ethernet Driver
   *
   * (C) Copyright 1995-2003 by Geert Uytterhoeven <geert@linux-m68k.org>
   *
   * Fixes and tips by:
   *	- Janos Farkas (CHEXUM@sparta.banki.hu)
   *	- Jes Degn Soerensen (jds@kom.auc.dk)
   *	- Matt Domsch (Matt_Domsch@dell.com)
   *
   * ----------------------------------------------------------------------------
   *
   * This program is based on
   *
   *	ariadne.?:	Amiga Linux/68k Ariadne Ethernet Driver
   *			(C) Copyright 1995 by Geert Uytterhoeven,
   *                                            Peter De Schrijver
   *
   *	lance.c:	An AMD LANCE ethernet driver for linux.
   *			Written 1993-94 by Donald Becker.
   *
   *	Am79C960:	PCnet(tm)-ISA Single-Chip Ethernet Controller
   *			Advanced Micro Devices
   *			Publication #16907, Rev. B, Amendment/0, May 1994
   *
   * ----------------------------------------------------------------------------
   *
   * This file is subject to the terms and conditions of the GNU General Public
   * License.  See the file COPYING in the main directory of the Linux
   * distribution for more details.
   *
   * ----------------------------------------------------------------------------
   *
   * The A2065 is a Zorro-II board made by Commodore/Ameristar. It contains:
   *
   *	- an Am7990 Local Area Network Controller for Ethernet (LANCE) with
   *	  both 10BASE-2 (thin coax) and AUI (DB-15) connectors
   */
  
  #include <linux/errno.h>
  #include <linux/netdevice.h>
  #include <linux/etherdevice.h>
  #include <linux/module.h>
  #include <linux/stddef.h>
  #include <linux/kernel.h>
  #include <linux/interrupt.h>
  #include <linux/ioport.h>
  #include <linux/skbuff.h>
  #include <linux/slab.h>
  #include <linux/string.h>
  #include <linux/init.h>
  #include <linux/crc32.h>
  #include <linux/zorro.h>
  #include <linux/bitops.h>
  
  #include <asm/irq.h>
  #include <asm/amigaints.h>
  #include <asm/amigahw.h>
  
  #include "a2065.h"
  
  
  	/*
  	 *		Transmit/Receive Ring Definitions
  	 */
  
  #define LANCE_LOG_TX_BUFFERS	(2)
  #define LANCE_LOG_RX_BUFFERS	(4)
  
  #define TX_RING_SIZE		(1<<LANCE_LOG_TX_BUFFERS)
  #define RX_RING_SIZE		(1<<LANCE_LOG_RX_BUFFERS)
  
  #define TX_RING_MOD_MASK	(TX_RING_SIZE-1)
  #define RX_RING_MOD_MASK	(RX_RING_SIZE-1)
  
  #define PKT_BUF_SIZE		(1544)
  #define RX_BUFF_SIZE            PKT_BUF_SIZE
  #define TX_BUFF_SIZE            PKT_BUF_SIZE
  
  
  	/*
  	 *		Layout of the Lance's RAM Buffer
  	 */
  
  
  struct lance_init_block {
  	unsigned short mode;		/* Pre-set mode (reg. 15) */
  	unsigned char phys_addr[6];     /* Physical ethernet address */
  	unsigned filter[2];		/* 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 */
  
  	/* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
  	struct lance_rx_desc brx_ring[RX_RING_SIZE];
  	struct lance_tx_desc btx_ring[TX_RING_SIZE];
  
  	char   rx_buf [RX_RING_SIZE][RX_BUFF_SIZE];
  	char   tx_buf [TX_RING_SIZE][TX_BUFF_SIZE];
  };
  
  
  	/*
  	 *		Private Device Data
  	 */
  
  struct lance_private {
  	char *name;
  	volatile struct lance_regs *ll;
  	volatile struct lance_init_block *init_block;	    /* Hosts view */
  	volatile struct lance_init_block *lance_init_block; /* Lance view */
  
  	int rx_new, tx_new;
  	int rx_old, tx_old;
  
  	int lance_log_rx_bufs, lance_log_tx_bufs;
  	int rx_ring_mod_mask, tx_ring_mod_mask;
  
  	int tpe;		      /* cable-selection is TPE */
  	int auto_select;	      /* cable-selection by carrier */
  	unsigned short busmaster_regval;
  
  #ifdef CONFIG_SUNLANCE
  	struct Linux_SBus_DMA *ledma; /* if set this points to ledma and arch=4m */
  	int burst_sizes;	      /* ledma SBus burst sizes */
  #endif
  	struct timer_list         multicast_timer;
  };
  
  #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
  			lp->tx_old+lp->tx_ring_mod_mask-lp->tx_new:\
  			lp->tx_old - lp->tx_new-1)
  
  
  #define LANCE_ADDR(x) ((int)(x) & ~0xff000000)
  
  /* Load the CSR registers */
  static void load_csrs (struct lance_private *lp)
  {
  	volatile struct lance_regs *ll = lp->ll;
  	volatile struct lance_init_block *aib = lp->lance_init_block;
  	int leptr;
  
  	leptr = LANCE_ADDR (aib);
  
  	ll->rap = LE_CSR1;
  	ll->rdp = (leptr & 0xFFFF);
  	ll->rap = LE_CSR2;
  	ll->rdp = leptr >> 16;
  	ll->rap = LE_CSR3;
  	ll->rdp = lp->busmaster_regval;
  
  	/* Point back to csr0 */
  	ll->rap = LE_CSR0;
  }
  
  #define ZERO 0
  
  /* Setup the Lance Rx and Tx rings */
  static void lance_init_ring (struct net_device *dev)
  {
  	struct lance_private *lp = netdev_priv(dev);
  	volatile struct lance_init_block *ib = lp->init_block;
  	volatile struct lance_init_block *aib; /* for LANCE_ADDR computations */
  	int leptr;
  	int i;
  
  	aib = lp->lance_init_block;
  
  	/* 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;
  
  	ib->mode = 0;
  
  	/* Copy the ethernet address to the lance init block
  	 * Note that on the sparc you need to swap the ethernet address.
  	 */
  	ib->phys_addr [0] = dev->dev_addr [1];
  	ib->phys_addr [1] = dev->dev_addr [0];
  	ib->phys_addr [2] = dev->dev_addr [3];
  	ib->phys_addr [3] = dev->dev_addr [2];
  	ib->phys_addr [4] = dev->dev_addr [5];
  	ib->phys_addr [5] = dev->dev_addr [4];
  
  	if (ZERO)
  		printk(KERN_DEBUG "TX rings:\n");
  
  	/* Setup the Tx ring entries */
  	for (i = 0; i <= (1<<lp->lance_log_tx_bufs); i++) {
  		leptr = LANCE_ADDR(&aib->tx_buf[i][0]);
  		ib->btx_ring [i].tmd0      = leptr;
  		ib->btx_ring [i].tmd1_hadr = leptr >> 16;
  		ib->btx_ring [i].tmd1_bits = 0;
  		ib->btx_ring [i].length    = 0xf000; /* The ones required by tmd2 */
  		ib->btx_ring [i].misc      = 0;
  		if (i < 3 && ZERO)
  			printk(KERN_DEBUG "%d: 0x%8.8x\n", i, leptr);
  	}
  
  	/* Setup the Rx ring entries */
  	if (ZERO)
  		printk(KERN_DEBUG "RX rings:\n");
  	for (i = 0; i < (1<<lp->lance_log_rx_bufs); i++) {
  		leptr = LANCE_ADDR(&aib->rx_buf[i][0]);
  
  		ib->brx_ring [i].rmd0      = leptr;
  		ib->brx_ring [i].rmd1_hadr = leptr >> 16;
  		ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
  		ib->brx_ring [i].length    = -RX_BUFF_SIZE | 0xf000;
  		ib->brx_ring [i].mblength  = 0;
  		if (i < 3 && ZERO)
  			printk(KERN_DEBUG "%d: 0x%8.8x\n", i, leptr);
  	}
  
  	/* Setup the initialization block */
  
  	/* Setup rx descriptor pointer */
  	leptr = LANCE_ADDR(&aib->brx_ring);
  	ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16);
  	ib->rx_ptr = leptr;
  	if (ZERO)
  		printk(KERN_DEBUG "RX ptr: %8.8x\n", leptr);
  
  	/* Setup tx descriptor pointer */
  	leptr = LANCE_ADDR(&aib->btx_ring);
  	ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16);
  	ib->tx_ptr = leptr;
  	if (ZERO)
  		printk(KERN_DEBUG "TX ptr: %8.8x\n", leptr);
  
  	/* Clear the multicast filter */
  	ib->filter [0] = 0;
  	ib->filter [1] = 0;
  }
  
  static int init_restart_lance (struct lance_private *lp)
  {
  	volatile struct lance_regs *ll = lp->ll;
  	int i;
  
  	ll->rap = LE_CSR0;
  	ll->rdp = LE_C0_INIT;
  
  	/* Wait for the lance to complete initialization */
  	for (i = 0; (i < 100) && !(ll->rdp & (LE_C0_ERR | LE_C0_IDON)); i++)
  		barrier();
  	if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
  		printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n",
  		       i, ll->rdp);
  		return -EIO;
  	}
  
  	/* Clear IDON by writing a "1", enable interrupts and start lance */
  	ll->rdp = LE_C0_IDON;
  	ll->rdp = LE_C0_INEA | LE_C0_STRT;
  
  	return 0;
  }
  
  static int lance_rx (struct net_device *dev)
  {
  	struct lance_private *lp = netdev_priv(dev);
  	volatile struct lance_init_block *ib = lp->init_block;
  	volatile struct lance_regs *ll = lp->ll;
  	volatile struct lance_rx_desc *rd;
  	unsigned char bits;
  
  #ifdef TEST_HITS
  	int i;
  	printk(KERN_DEBUG "[");
  	for (i = 0; i < RX_RING_SIZE; i++) {
  		if (i == lp->rx_new)
  			printk ("%s",
  				ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "_" : "X");
  		else
  			printk ("%s",
  				ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "." : "1");
  	}
  	printk ("]\n");
  #endif
  
  	ll->rdp = LE_C0_RINT|LE_C0_INEA;
  	for (rd = &ib->brx_ring [lp->rx_new];
  	     !((bits = rd->rmd1_bits) & LE_R1_OWN);
  	     rd = &ib->brx_ring [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++;
  			continue;
  		} 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 {
  			int len = (rd->mblength & 0xfff) - 4;
  			struct sk_buff *skb = dev_alloc_skb (len+2);
  
  			if (!skb) {
  				printk(KERN_WARNING "%s: Memory squeeze, "
  				       "deferring packet.\n", dev->name);
  				dev->stats.rx_dropped++;
  				rd->mblength = 0;
  				rd->rmd1_bits = LE_R1_OWN;
  				lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
  				return 0;
  			}
  
  			skb_reserve (skb, 2);		/* 16 byte align */
  			skb_put (skb, len);		/* make room */
  			skb_copy_to_linear_data(skb,
  					 (unsigned char *)&(ib->rx_buf [lp->rx_new][0]),
  					 len);
  			skb->protocol = eth_type_trans (skb, dev);
  			netif_rx (skb);
  			dev->stats.rx_packets++;
  			dev->stats.rx_bytes += len;
  		}
  
  		/* Return the packet to the pool */
  		rd->mblength = 0;
  		rd->rmd1_bits = LE_R1_OWN;
  		lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
  	}
  	return 0;
  }
  
  static int lance_tx (struct net_device *dev)
  {
  	struct lance_private *lp = netdev_priv(dev);
  	volatile struct lance_init_block *ib = lp->init_block;
  	volatile struct lance_regs *ll = lp->ll;
  	volatile struct lance_tx_desc *td;
  	int i, j;
  	int status;
  
  	/* csr0 is 2f3 */
  	ll->rdp = LE_C0_TINT | LE_C0_INEA;
  	/* csr0 is 73 */
  
  	j = lp->tx_old;
  	for (i = j; i != lp->tx_new; i = j) {
  		td = &ib->btx_ring [i];
  
  		/* If we hit a packet not owned by us, stop */
  		if (td->tmd1_bits & LE_T1_OWN)
  			break;
  
  		if (td->tmd1_bits & LE_T1_ERR) {
  			status = td->misc;
  
  			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++;
  				if (lp->auto_select) {
  					lp->tpe = 1 - lp->tpe;
  					printk(KERN_ERR "%s: Carrier Lost, "
  					       "trying %s\n", dev->name,
  					       lp->tpe?"TPE":"AUI");
  					/* Stop the lance */
  					ll->rap = LE_CSR0;
  					ll->rdp = LE_C0_STOP;
  					lance_init_ring (dev);
  					load_csrs (lp);
  					init_restart_lance (lp);
  					return 0;
  				}
  			}
  
  			/* 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(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, "
  				       "restarting\n", dev->name);
  				/* Stop the lance */
  				ll->rap = LE_CSR0;
  				ll->rdp = LE_C0_STOP;
  				lance_init_ring (dev);
  				load_csrs (lp);
  				init_restart_lance (lp);
  				return 0;
  			}
  		} else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
  			/*
  			 * So we don't count the packet more than once.
  			 */
  			td->tmd1_bits &= ~(LE_T1_POK);
  
  			/* One collision before packet was sent. */
  			if (td->tmd1_bits & LE_T1_EONE)
  				dev->stats.collisions++;
  
  			/* More than one collision, be optimistic. */
  			if (td->tmd1_bits & LE_T1_EMORE)
  				dev->stats.collisions += 2;
  
  			dev->stats.tx_packets++;
  		}
  
  		j = (j + 1) & lp->tx_ring_mod_mask;
  	}
  	lp->tx_old = j;
  	ll->rdp = LE_C0_TINT | LE_C0_INEA;
  	return 0;
  }
  
  static irqreturn_t lance_interrupt (int irq, void *dev_id)
  {
  	struct net_device *dev;
  	struct lance_private *lp;
  	volatile struct lance_regs *ll;
  	int csr0;
  
  	dev = (struct net_device *) dev_id;
  
  	lp = netdev_priv(dev);
  	ll = lp->ll;
  
  	ll->rap = LE_CSR0;		/* LANCE Controller Status */
  	csr0 = ll->rdp;
  
  	if (!(csr0 & LE_C0_INTR))	/* Check if any interrupt has */
  		return IRQ_NONE;	/* been generated by the Lance. */
  
  	/* Acknowledge all the interrupt sources ASAP */
  	ll->rdp = csr0 & ~(LE_C0_INEA|LE_C0_TDMD|LE_C0_STOP|LE_C0_STRT|
  			   LE_C0_INIT);
  
  	if ((csr0 & LE_C0_ERR)) {
  		/* Clear the error condition */
  		ll->rdp = LE_C0_BABL|LE_C0_ERR|LE_C0_MISS|LE_C0_INEA;
  	}
  
  	if (csr0 & LE_C0_RINT)
  		lance_rx (dev);
  
  	if (csr0 & LE_C0_TINT)
  		lance_tx (dev);
  
  	/* Log misc errors. */
  	if (csr0 & LE_C0_BABL)
  		dev->stats.tx_errors++;       /* Tx babble. */
  	if (csr0 & LE_C0_MISS)
  		dev->stats.rx_errors++;       /* Missed a Rx frame. */
  	if (csr0 & LE_C0_MERR) {
  		printk(KERN_ERR "%s: Bus master arbitration failure, status "
  		       "%4.4x.\n", dev->name, csr0);
  		/* Restart the chip. */
  		ll->rdp = LE_C0_STRT;
  	}
  
  	if (netif_queue_stopped(dev) && TX_BUFFS_AVAIL > 0)
  		netif_wake_queue(dev);
  
  	ll->rap = LE_CSR0;
  	ll->rdp = LE_C0_BABL|LE_C0_CERR|LE_C0_MISS|LE_C0_MERR|
  					LE_C0_IDON|LE_C0_INEA;
  	return IRQ_HANDLED;
  }
  
  static int lance_open (struct net_device *dev)
  {
  	struct lance_private *lp = netdev_priv(dev);
  	volatile struct lance_regs *ll = lp->ll;
  	int ret;
  
  	/* Stop the Lance */
  	ll->rap = LE_CSR0;
  	ll->rdp = LE_C0_STOP;
  
  	/* Install the Interrupt handler */
  	ret = request_irq(IRQ_AMIGA_PORTS, lance_interrupt, IRQF_SHARED,
  			  dev->name, dev);
  	if (ret) return ret;
  
  	load_csrs (lp);
  	lance_init_ring (dev);
  
  	netif_start_queue(dev);
  
  	return init_restart_lance (lp);
  }
  
  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 */
  	ll->rap = LE_CSR0;
  	ll->rdp = LE_C0_STOP;
  
  	free_irq(IRQ_AMIGA_PORTS, 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 */
  	ll->rap = LE_CSR0;
  	ll->rdp = LE_C0_STOP;
  
  	load_csrs (lp);
  
  	lance_init_ring (dev);
  	dev->trans_start = jiffies;
  	netif_start_queue(dev);
  
  	status = init_restart_lance (lp);
  #ifdef DEBUG_DRIVER
  	printk(KERN_DEBUG "Lance restart=%d\n", status);
  #endif
  	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 struct lance_init_block *ib = lp->init_block;
  	int entry, skblen;
  	int status = NETDEV_TX_OK;
  	unsigned long flags;
  
  	if (skb_padto(skb, ETH_ZLEN))
  		return NETDEV_TX_OK;
  	skblen = max_t(unsigned, skb->len, ETH_ZLEN);
  
  	local_irq_save(flags);
  
  	if (!TX_BUFFS_AVAIL){
  		local_irq_restore(flags);
  		return NETDEV_TX_LOCKED;
  	}
  
  #ifdef DEBUG_DRIVER
  	/* dump the packet */
  	print_hex_dump(KERN_DEBUG, "skb->data: ", DUMP_PREFIX_NONE,
  		       16, 1, skb->data, 64, true);
  #endif
  	entry = lp->tx_new & lp->tx_ring_mod_mask;
  	ib->btx_ring [entry].length = (-skblen) | 0xf000;
  	ib->btx_ring [entry].misc = 0;
  
  	skb_copy_from_linear_data(skb, (void *)&ib->tx_buf [entry][0], skblen);
  
  	/* Now, give the packet to the lance */
  	ib->btx_ring [entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
  	lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask;
  	dev->stats.tx_bytes += skblen;
  
  	if (TX_BUFFS_AVAIL <= 0)
  		netif_stop_queue(dev);
  
  	/* Kick the lance: transmit now */
  	ll->rdp = LE_C0_INEA | LE_C0_TDMD;
  	dev->trans_start = jiffies;
  	dev_kfree_skb (skb);
  
  	local_irq_restore(flags);
  
  	return status;
  }
  
  /* taken from the depca driver */
  static void lance_load_multicast (struct net_device *dev)
  {
  	struct lance_private *lp = netdev_priv(dev);
  	volatile struct lance_init_block *ib = lp->init_block;
  	volatile u16 *mcast_table = (u16 *)&ib->filter;
  	struct dev_mc_list *dmi=dev->mc_list;
  	char *addrs;
  	int i;
  	u32 crc;
  
  	/* set all multicast bits */
  	if (dev->flags & IFF_ALLMULTI){
  		ib->filter [0] = 0xffffffff;
  		ib->filter [1] = 0xffffffff;
  		return;
  	}
  	/* clear the multicast filter */
  	ib->filter [0] = 0;
  	ib->filter [1] = 0;
  
  	/* Add addresses */
  	for (i = 0; i < dev->mc_count; i++){
  		addrs = dmi->dmi_addr;
  		dmi   = dmi->next;
  
  		/* multicast address? */
  		if (!(*addrs & 1))
  			continue;
  
  		crc = ether_crc_le(6, addrs);
  		crc = crc >> 26;
  		mcast_table [crc >> 4] |= 1 << (crc & 0xf);
  	}
  	return;
  }
  
  static void lance_set_multicast (struct net_device *dev)
  {
  	struct lance_private *lp = netdev_priv(dev);
  	volatile struct lance_init_block *ib = lp->init_block;
  	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);
  		netif_wake_queue(dev);
  		return;
  	}
  
  	netif_stop_queue(dev);
  
  	ll->rap = LE_CSR0;
  	ll->rdp = LE_C0_STOP;
  	lance_init_ring (dev);
  
  	if (dev->flags & IFF_PROMISC) {
  		ib->mode |= LE_MO_PROM;
  	} else {
  		ib->mode &= ~LE_MO_PROM;
  		lance_load_multicast (dev);
  	}
  	load_csrs (lp);
  	init_restart_lance (lp);
  	netif_wake_queue(dev);
  }
  
  static int __devinit a2065_init_one(struct zorro_dev *z,
  				    const struct zorro_device_id *ent);
  static void __devexit a2065_remove_one(struct zorro_dev *z);
  
  
  static struct zorro_device_id a2065_zorro_tbl[] __devinitdata = {
  	{ ZORRO_PROD_CBM_A2065_1 },
  	{ ZORRO_PROD_CBM_A2065_2 },
  	{ ZORRO_PROD_AMERISTAR_A2065 },
  	{ 0 }
  };
  
  static struct zorro_driver a2065_driver = {
  	.name		= "a2065",
  	.id_table	= a2065_zorro_tbl,
  	.probe		= a2065_init_one,
  	.remove		= __devexit_p(a2065_remove_one),
  };
  
  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_multicast_list	= lance_set_multicast,
  	.ndo_validate_addr	= eth_validate_addr,
  	.ndo_change_mtu		= eth_change_mtu,
  	.ndo_set_mac_address	= eth_mac_addr,
  };
  
  static int __devinit a2065_init_one(struct zorro_dev *z,
  				    const struct zorro_device_id *ent)
  {
  	struct net_device *dev;
  	struct lance_private *priv;
  	unsigned long board, base_addr, mem_start;
  	struct resource *r1, *r2;
  	int err;
  
  	board = z->resource.start;
  	base_addr = board+A2065_LANCE;
  	mem_start = board+A2065_RAM;
  
  	r1 = request_mem_region(base_addr, sizeof(struct lance_regs),
  				"Am7990");
  	if (!r1)
  		return -EBUSY;
  	r2 = request_mem_region(mem_start, A2065_RAM_SIZE, "RAM");
  	if (!r2) {
  		release_resource(r1);
  		return -EBUSY;
  	}
  
  	dev = alloc_etherdev(sizeof(struct lance_private));
  	if (dev == NULL) {
  		release_resource(r1);
  		release_resource(r2);
  		return -ENOMEM;
  	}
  
  	priv = netdev_priv(dev);
  
  	r1->name = dev->name;
  	r2->name = dev->name;
  
  	dev->dev_addr[0] = 0x00;
  	if (z->id != ZORRO_PROD_AMERISTAR_A2065) {	/* Commodore */
  		dev->dev_addr[1] = 0x80;
  		dev->dev_addr[2] = 0x10;
  	} else {					/* Ameristar */
  		dev->dev_addr[1] = 0x00;
  		dev->dev_addr[2] = 0x9f;
  	}
  	dev->dev_addr[3] = (z->rom.er_SerialNumber>>16) & 0xff;
  	dev->dev_addr[4] = (z->rom.er_SerialNumber>>8) & 0xff;
  	dev->dev_addr[5] = z->rom.er_SerialNumber & 0xff;
  	dev->base_addr = ZTWO_VADDR(base_addr);
  	dev->mem_start = ZTWO_VADDR(mem_start);
  	dev->mem_end = dev->mem_start+A2065_RAM_SIZE;
  
  	priv->ll = (volatile struct lance_regs *)dev->base_addr;
  	priv->init_block = (struct lance_init_block *)dev->mem_start;
  	priv->lance_init_block = (struct lance_init_block *)A2065_RAM;
  	priv->auto_select = 0;
  	priv->busmaster_regval = LE_C3_BSWP;
  
  	priv->lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
  	priv->lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
  	priv->rx_ring_mod_mask = RX_RING_MOD_MASK;
  	priv->tx_ring_mod_mask = TX_RING_MOD_MASK;
  
  	dev->netdev_ops = &lance_netdev_ops;
  	dev->watchdog_timeo = 5*HZ;
  	dev->dma = 0;
  
  	init_timer(&priv->multicast_timer);
  	priv->multicast_timer.data = (unsigned long) dev;
  	priv->multicast_timer.function =
  		(void (*)(unsigned long)) &lance_set_multicast;
  
  	err = register_netdev(dev);
  	if (err) {
  		release_resource(r1);
  		release_resource(r2);
  		free_netdev(dev);
  		return err;
  	}
  	zorro_set_drvdata(z, dev);
  
  	printk(KERN_INFO "%s: A2065 at 0x%08lx, Ethernet Address "
  	       "%pM\n", dev->name, board, dev->dev_addr);
  
  	return 0;
  }
  
  
  static void __devexit a2065_remove_one(struct zorro_dev *z)
  {
  	struct net_device *dev = zorro_get_drvdata(z);
  
  	unregister_netdev(dev);
  	release_mem_region(ZTWO_PADDR(dev->base_addr),
  			   sizeof(struct lance_regs));
  	release_mem_region(ZTWO_PADDR(dev->mem_start), A2065_RAM_SIZE);
  	free_netdev(dev);
  }
  
  static int __init a2065_init_module(void)
  {
  	return zorro_register_driver(&a2065_driver);
  }
  
  static void __exit a2065_cleanup_module(void)
  {
  	zorro_unregister_driver(&a2065_driver);
  }
  
  module_init(a2065_init_module);
  module_exit(a2065_cleanup_module);
  
  MODULE_LICENSE("GPL");
  