amd: Move AMD (Lance) chipset drivers

Moves the drivers for the AMD chipsets into drivers/net/ethernet/amd/
and the necessary Kconfig and Makfile changes.

The au1000 (Alchemy) driver was also moved into the same directory
even though it is not a "Lance" driver.

CC: Peter Maydell <pmaydell@chiark.greenend.org.uk>
CC: Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
CC: "Maciej W. Rozycki" <macro@linux-mips.org>
CC: Donald Becker <becker@scyld.com>
CC: Sam Creasey <sammy@users.qual.net>
CC: Miguel de Icaza <miguel@nuclecu.unam.mx>
CC: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
CC: Don Fry <pcnet32@frontier.com>
CC: Geert Uytterhoeven <geert@linux-m68k.org>
CC: Russell King <linux@arm.linux.org.uk>
CC: David Davies <davies@maniac.ultranet.com>
CC: "M.Hipp" <hippm@informatik.uni-tuebingen.de>
CC: Pete Popov <ppopov@embeddedalley.com>
CC: David Hinds <dahinds@users.sourceforge.net>
CC: "Roger C. Pao" <rpao@paonet.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 2111 insertions, 0 deletions

diff --git a/drivers/net/ethernet/amd/depca.c b/drivers/net/ethernet/amd/depca.c
new file mode 100644
index 000000000000..f2015a851977
--- /dev/null
+++ b/drivers/net/ethernet/amd/depca.c
@@ -0,0 +1,2111 @@
+/*  depca.c: A DIGITAL DEPCA & EtherWORKS ethernet driver for linux.
+
+    Written 1994, 1995 by David C. Davies.
+
+
+                      Copyright 1994 David C. Davies
+		                   and
+			 United States Government
+	 (as represented by the Director, National Security Agency).
+
+               Copyright 1995  Digital Equipment Corporation.
+
+
+    This software may be used and distributed according to the terms of
+    the GNU General Public License, incorporated herein by reference.
+
+    This driver is written for the Digital Equipment Corporation series
+    of DEPCA and EtherWORKS ethernet cards:
+
+        DEPCA       (the original)
+    	DE100
+    	DE101
+	DE200 Turbo
+	DE201 Turbo
+	DE202 Turbo (TP BNC)
+	DE210
+	DE422       (EISA)
+
+    The  driver has been tested on DE100, DE200 and DE202 cards  in  a
+    relatively busy network. The DE422 has been tested a little.
+
+    This  driver will NOT work   for the DE203,  DE204  and DE205 series  of
+    cards,  since they have  a  new custom ASIC in   place of the AMD  LANCE
+    chip.  See the 'ewrk3.c'   driver in the  Linux  source tree for running
+    those cards.
+
+    I have benchmarked the driver with a  DE100 at 595kB/s to (542kB/s from)
+    a DECstation 5000/200.
+
+    The author may be reached at davies@maniac.ultranet.com
+
+    =========================================================================
+
+    The  driver was originally based  on   the 'lance.c' driver from  Donald
+    Becker   which  is included with  the  standard  driver distribution for
+    linux.  V0.4  is  a complete  re-write  with only  the kernel  interface
+    remaining from the original code.
+
+    1) Lance.c code in /linux/drivers/net/
+    2) "Ethernet/IEEE 802.3 Family. 1992 World Network Data Book/Handbook",
+       AMD, 1992 [(800) 222-9323].
+    3) "Am79C90 CMOS Local Area Network Controller for Ethernet (C-LANCE)",
+       AMD, Pub. #17881, May 1993.
+    4) "Am79C960 PCnet-ISA(tm), Single-Chip Ethernet Controller for ISA",
+       AMD, Pub. #16907, May 1992
+    5) "DEC EtherWORKS LC Ethernet Controller Owners Manual",
+       Digital Equipment corporation, 1990, Pub. #EK-DE100-OM.003
+    6) "DEC EtherWORKS Turbo Ethernet Controller Owners Manual",
+       Digital Equipment corporation, 1990, Pub. #EK-DE200-OM.003
+    7) "DEPCA Hardware Reference Manual", Pub. #EK-DEPCA-PR
+       Digital Equipment Corporation, 1989
+    8) "DEC EtherWORKS Turbo_(TP BNC) Ethernet Controller Owners Manual",
+       Digital Equipment corporation, 1991, Pub. #EK-DE202-OM.001
+
+
+    Peter Bauer's depca.c (V0.5) was referred to when debugging V0.1 of this
+    driver.
+
+    The original DEPCA  card requires that the  ethernet ROM address counter
+    be enabled to count and has an 8 bit NICSR.  The ROM counter enabling is
+    only  done when a  0x08 is read as the  first address octet (to minimise
+    the chances  of writing over some  other hardware's  I/O register).  The
+    NICSR accesses   have been changed  to  byte accesses  for all the cards
+    supported by this driver, since there is only one  useful bit in the MSB
+    (remote boot timeout) and it  is not used.  Also, there  is a maximum of
+    only 48kB network  RAM for this  card.  My thanks  to Torbjorn Lindh for
+    help debugging all this (and holding my feet to  the fire until I got it
+    right).
+
+    The DE200  series  boards have  on-board 64kB  RAM for  use  as a shared
+    memory network  buffer. Only the DE100  cards make use  of a  2kB buffer
+    mode which has not  been implemented in  this driver (only the 32kB  and
+    64kB modes are supported [16kB/48kB for the original DEPCA]).
+
+    At the most only 2 DEPCA cards can  be supported on  the ISA bus because
+    there is only provision  for two I/O base addresses  on each card (0x300
+    and 0x200). The I/O address is detected by searching for a byte sequence
+    in the Ethernet station address PROM at the expected I/O address for the
+    Ethernet  PROM.   The shared memory  base   address  is 'autoprobed'  by
+    looking  for the self  test PROM  and detecting the  card name.   When a
+    second  DEPCA is  detected,  information  is   placed in the   base_addr
+    variable of the  next device structure (which  is created if necessary),
+    thus  enabling ethif_probe  initialization  for the device.  More than 2
+    EISA cards can  be  supported, but  care will  be  needed assigning  the
+    shared memory to ensure that each slot has the  correct IRQ, I/O address
+    and shared memory address assigned.
+
+    ************************************************************************
+
+    NOTE: If you are using two  ISA DEPCAs, it is  important that you assign
+    the base memory addresses correctly.   The  driver autoprobes I/O  0x300
+    then 0x200.  The  base memory address for  the first device must be less
+    than that of the second so that the auto probe will correctly assign the
+    I/O and memory addresses on the same card.  I can't think of a way to do
+    this unambiguously at the moment, since there is nothing on the cards to
+    tie I/O and memory information together.
+
+    I am unable  to  test  2 cards   together for now,    so this  code   is
+    unchecked. All reports, good or bad, are welcome.
+
+    ************************************************************************
+
+    The board IRQ   setting must be  at an  unused IRQ which  is auto-probed
+    using Donald Becker's autoprobe routines. DEPCA and DE100 board IRQs are
+    {2,3,4,5,7}, whereas the  DE200 is at {5,9,10,11,15}.  Note that IRQ2 is
+    really IRQ9 in machines with 16 IRQ lines.
+
+    No 16MB memory  limitation should exist with this  driver as DMA is  not
+    used and the common memory area is in low memory on the network card (my
+    current system has 20MB and I've not had problems yet).
+
+    The ability to load this driver as a loadable module has been added. To
+    utilise this ability, you have to do <8 things:
+
+    0) have a copy of the loadable modules code installed on your system.
+    1) copy depca.c from the  /linux/drivers/net directory to your favourite
+    temporary directory.
+    2) if you wish, edit the  source code near  line 1530 to reflect the I/O
+    address and IRQ you're using (see also 5).
+    3) compile  depca.c, but include -DMODULE in  the command line to ensure
+    that the correct bits are compiled (see end of source code).
+    4) if you are wanting to add a new  card, goto 5. Otherwise, recompile a
+    kernel with the depca configuration turned off and reboot.
+    5) insmod depca.o [irq=7] [io=0x200] [mem=0xd0000] [adapter_name=DE100]
+       [Alan Cox: Changed the code to allow command line irq/io assignments]
+       [Dave Davies: Changed the code to allow command line mem/name
+                                                                assignments]
+    6) run the net startup bits for your eth?? interface manually
+    (usually /etc/rc.inet[12] at boot time).
+    7) enjoy!
+
+    Note that autoprobing is not allowed in loadable modules - the system is
+    already up and running and you're messing with interrupts.
+
+    To unload a module, turn off the associated interface
+    'ifconfig eth?? down' then 'rmmod depca'.
+
+    To assign a base memory address for the shared memory  when running as a
+    loadable module, see 5 above.  To include the adapter  name (if you have
+    no PROM  but know the card name)  also see 5  above. Note that this last
+    option  will not work  with kernel  built-in  depca's.
+
+    The shared memory assignment for a loadable module  makes sense to avoid
+    the 'memory autoprobe' picking the wrong shared memory  (for the case of
+    2 depca's in a PC).
+
+    ************************************************************************
+    Support for MCA EtherWORKS cards added 11-3-98.
+    Verified to work with up to 2 DE212 cards in a system (although not
+      fully stress-tested).
+
+    Currently known bugs/limitations:
+
+    Note:  with the MCA stuff as a module, it trusts the MCA configuration,
+           not the command line for IRQ and memory address.  You can
+           specify them if you want, but it will throw your values out.
+           You still have to pass the IO address it was configured as
+           though.
+
+    ************************************************************************
+    TO DO:
+    ------
+
+
+    Revision History
+    ----------------
+
+    Version   Date        Description
+
+      0.1     25-jan-94   Initial writing.
+      0.2     27-jan-94   Added LANCE TX hardware buffer chaining.
+      0.3      1-feb-94   Added multiple DEPCA support.
+      0.31     4-feb-94   Added DE202 recognition.
+      0.32    19-feb-94   Tidy up. Improve multi-DEPCA support.
+      0.33    25-feb-94   Fix DEPCA ethernet ROM counter enable.
+                          Add jabber packet fix from murf@perftech.com
+			  and becker@super.org
+      0.34     7-mar-94   Fix DEPCA max network memory RAM & NICSR access.
+      0.35     8-mar-94   Added DE201 recognition. Tidied up.
+      0.351   30-apr-94   Added EISA support. Added DE422 recognition.
+      0.36    16-may-94   DE422 fix released.
+      0.37    22-jul-94   Added MODULE support
+      0.38    15-aug-94   Added DBR ROM switch in depca_close().
+                          Multi DEPCA bug fix.
+      0.38axp 15-sep-94   Special version for Alpha AXP Linux V1.0.
+      0.381   12-dec-94   Added DE101 recognition, fix multicast bug.
+      0.382    9-feb-95   Fix recognition bug reported by <bkm@star.rl.ac.uk>.
+      0.383   22-feb-95   Fix for conflict with VESA SCSI reported by
+                          <stromain@alf.dec.com>
+      0.384   17-mar-95   Fix a ring full bug reported by <bkm@star.rl.ac.uk>
+      0.385    3-apr-95   Fix a recognition bug reported by
+                                                <ryan.niemi@lastfrontier.com>
+      0.386   21-apr-95   Fix the last fix...sorry, must be galloping senility
+      0.40    25-May-95   Rewrite for portability & updated.
+                          ALPHA support from <jestabro@amt.tay1.dec.com>
+      0.41    26-Jun-95   Added verify_area() calls in depca_ioctl() from
+                          suggestion by <heiko@colossus.escape.de>
+      0.42    27-Dec-95   Add 'mem' shared memory assignment for loadable
+                          modules.
+                          Add 'adapter_name' for loadable modules when no PROM.
+			  Both above from a suggestion by
+			  <pchen@woodruffs121.residence.gatech.edu>.
+			  Add new multicasting code.
+      0.421   22-Apr-96	  Fix alloc_device() bug <jari@markkus2.fimr.fi>
+      0.422   29-Apr-96	  Fix depca_hw_init() bug <jari@markkus2.fimr.fi>
+      0.423    7-Jun-96   Fix module load bug <kmg@barco.be>
+      0.43    16-Aug-96   Update alloc_device() to conform to de4x5.c
+      0.44     1-Sep-97   Fix *_probe() to test check_region() first - bug
+                           reported by <mmogilvi@elbert.uccs.edu>
+      0.45     3-Nov-98   Added support for MCA EtherWORKS (DE210/DE212) cards
+                           by <tymm@computer.org>
+      0.451    5-Nov-98   Fixed mca stuff cuz I'm a dummy. <tymm@computer.org>
+      0.5     14-Nov-98   Re-spin for 2.1.x kernels.
+      0.51    27-Jun-99   Correct received packet length for CRC from
+                           report by <worm@dkik.dk>
+      0.52    16-Oct-00   Fixes for 2.3 io memory accesses
+                          Fix show-stopper (ints left masked) in depca_interrupt
+			   by <peterd@pnd-pc.demon.co.uk>
+      0.53    12-Jan-01	  Release resources on failure, bss tidbits
+      			   by acme@conectiva.com.br
+      0.54    08-Nov-01	  use library crc32 functions
+      			   by Matt_Domsch@dell.com
+      0.55    01-Mar-03   Use EISA/sysfs framework <maz@wild-wind.fr.eu.org>
+
+    =========================================================================
+*/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/crc32.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/time.h>
+#include <linux/types.h>
+#include <linux/unistd.h>
+#include <linux/ctype.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/bitops.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+
+#ifdef CONFIG_MCA
+#include <linux/mca.h>
+#endif
+
+#ifdef CONFIG_EISA
+#include <linux/eisa.h>
+#endif
+
+#include "depca.h"
+
+static char version[] __initdata = "depca.c:v0.53 2001/1/12 davies@maniac.ultranet.com\n";
+
+#ifdef DEPCA_DEBUG
+static int depca_debug = DEPCA_DEBUG;
+#else
+static int depca_debug = 1;
+#endif
+
+#define DEPCA_NDA 0xffe0	/* No Device Address */
+
+#define TX_TIMEOUT (1*HZ)
+
+/*
+** Ethernet PROM defines
+*/
+#define PROBE_LENGTH    32
+#define ETH_PROM_SIG    0xAA5500FFUL
+
+/*
+** Set the number of Tx and Rx buffers. Ensure that the memory requested
+** here is <= to the amount of shared memory set up by the board switches.
+** The number of descriptors MUST BE A POWER OF 2.
+**
+** total_memory = NUM_RX_DESC*(8+RX_BUFF_SZ) + NUM_TX_DESC*(8+TX_BUFF_SZ)
+*/
+#define NUM_RX_DESC     8	/* Number of RX descriptors */
+#define NUM_TX_DESC     8	/* Number of TX descriptors */
+#define RX_BUFF_SZ	1536	/* Buffer size for each Rx buffer */
+#define TX_BUFF_SZ	1536	/* Buffer size for each Tx buffer */
+
+/*
+** EISA bus defines
+*/
+#define DEPCA_EISA_IO_PORTS 0x0c00	/* I/O port base address, slot 0 */
+
+/*
+** ISA Bus defines
+*/
+#define DEPCA_RAM_BASE_ADDRESSES {0xc0000,0xd0000,0xe0000,0x00000}
+#define DEPCA_TOTAL_SIZE 0x10
+
+static struct {
+	u_long iobase;
+	struct platform_device *device;
+} depca_io_ports[] = {
+	{ 0x300, NULL },
+	{ 0x200, NULL },
+	{ 0    , NULL },
+};
+
+/*
+** Name <-> Adapter mapping
+*/
+#define DEPCA_SIGNATURE {"DEPCA",\
+			 "DE100","DE101",\
+                         "DE200","DE201","DE202",\
+			 "DE210","DE212",\
+                         "DE422",\
+                         ""}
+
+static char* __initdata depca_signature[] = DEPCA_SIGNATURE;
+
+enum depca_type {
+	DEPCA, de100, de101, de200, de201, de202, de210, de212, de422, unknown
+};
+
+static char depca_string[] = "depca";
+
+static int depca_device_remove (struct device *device);
+
+#ifdef CONFIG_EISA
+static struct eisa_device_id depca_eisa_ids[] = {
+	{ "DEC4220", de422 },
+	{ "" }
+};
+MODULE_DEVICE_TABLE(eisa, depca_eisa_ids);
+
+static int depca_eisa_probe  (struct device *device);
+
+static struct eisa_driver depca_eisa_driver = {
+	.id_table = depca_eisa_ids,
+	.driver   = {
+		.name    = depca_string,
+		.probe   = depca_eisa_probe,
+		.remove  = __devexit_p (depca_device_remove)
+	}
+};
+#endif
+
+#ifdef CONFIG_MCA
+/*
+** Adapter ID for the MCA EtherWORKS DE210/212 adapter
+*/
+#define DE210_ID 0x628d
+#define DE212_ID 0x6def
+
+static short depca_mca_adapter_ids[] = {
+	DE210_ID,
+	DE212_ID,
+	0x0000
+};
+
+static char *depca_mca_adapter_name[] = {
+	"DEC EtherWORKS MC Adapter (DE210)",
+	"DEC EtherWORKS MC Adapter (DE212)",
+	NULL
+};
+
+static enum depca_type depca_mca_adapter_type[] = {
+	de210,
+	de212,
+	0
+};
+
+static int depca_mca_probe (struct device *);
+
+static struct mca_driver depca_mca_driver = {
+	.id_table = depca_mca_adapter_ids,
+	.driver   = {
+		.name   = depca_string,
+		.bus    = &mca_bus_type,
+		.probe  = depca_mca_probe,
+		.remove = __devexit_p(depca_device_remove),
+	},
+};
+#endif
+
+static int depca_isa_probe (struct platform_device *);
+
+static int __devexit depca_isa_remove(struct platform_device *pdev)
+{
+	return depca_device_remove(&pdev->dev);
+}
+
+static struct platform_driver depca_isa_driver = {
+	.probe  = depca_isa_probe,
+	.remove = __devexit_p(depca_isa_remove),
+	.driver	= {
+		.name   = depca_string,
+	},
+};
+
+/*
+** Miscellaneous info...
+*/
+#define DEPCA_STRLEN 16
+
+/*
+** Memory Alignment. Each descriptor is 4 longwords long. To force a
+** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
+** DESC_ALIGN. DEPCA_ALIGN aligns the start address of the private memory area
+** and hence the RX descriptor ring's first entry.
+*/
+#define DEPCA_ALIGN4      ((u_long)4 - 1)	/* 1 longword align */
+#define DEPCA_ALIGN8      ((u_long)8 - 1)	/* 2 longword (quadword) align */
+#define DEPCA_ALIGN         DEPCA_ALIGN8	/* Keep the LANCE happy... */
+
+/*
+** The DEPCA Rx and Tx ring descriptors.
+*/
+struct depca_rx_desc {
+	volatile s32 base;
+	s16 buf_length;		/* This length is negative 2's complement! */
+	s16 msg_length;		/* This length is "normal". */
+};
+
+struct depca_tx_desc {
+	volatile s32 base;
+	s16 length;		/* This length is negative 2's complement! */
+	s16 misc;		/* Errors and TDR info */
+};
+
+#define LA_MASK 0x0000ffff	/* LANCE address mask for mapping network RAM
+				   to LANCE memory address space */
+
+/*
+** The Lance initialization block, described in databook, in common memory.
+*/
+struct depca_init {
+	u16 mode;		/* Mode register */
+	u8 phys_addr[ETH_ALEN];	/* Physical ethernet address */
+	u8 mcast_table[8];	/* Multicast Hash Table. */
+	u32 rx_ring;		/* Rx ring base pointer & ring length */
+	u32 tx_ring;		/* Tx ring base pointer & ring length */
+};
+
+#define DEPCA_PKT_STAT_SZ 16
+#define DEPCA_PKT_BIN_SZ  128	/* Should be >=100 unless you
+				   increase DEPCA_PKT_STAT_SZ */
+struct depca_private {
+	char adapter_name[DEPCA_STRLEN];	/* /proc/ioports string                  */
+	enum depca_type adapter;		/* Adapter type */
+	enum {
+                DEPCA_BUS_MCA = 1,
+                DEPCA_BUS_ISA,
+                DEPCA_BUS_EISA,
+        } depca_bus;	        /* type of bus */
+	struct depca_init init_block;	/* Shadow Initialization block            */
+/* CPU address space fields */
+	struct depca_rx_desc __iomem *rx_ring;	/* Pointer to start of RX descriptor ring */
+	struct depca_tx_desc __iomem *tx_ring;	/* Pointer to start of TX descriptor ring */
+	void __iomem *rx_buff[NUM_RX_DESC];	/* CPU virt address of sh'd memory buffs  */
+	void __iomem *tx_buff[NUM_TX_DESC];	/* CPU virt address of sh'd memory buffs  */
+	void __iomem *sh_mem;	/* CPU mapped virt address of device RAM  */
+	u_long mem_start;	/* Bus address of device RAM (before remap) */
+	u_long mem_len;		/* device memory size */
+/* Device address space fields */
+	u_long device_ram_start;	/* Start of RAM in device addr space      */
+/* Offsets used in both address spaces */
+	u_long rx_ring_offset;	/* Offset from start of RAM to rx_ring    */
+	u_long tx_ring_offset;	/* Offset from start of RAM to tx_ring    */
+	u_long buffs_offset;	/* LANCE Rx and Tx buffers start address. */
+/* Kernel-only (not device) fields */
+	int rx_new, tx_new;	/* The next free ring entry               */
+	int rx_old, tx_old;	/* The ring entries to be free()ed.       */
+	spinlock_t lock;
+	struct {		/* Private stats counters                 */
+		u32 bins[DEPCA_PKT_STAT_SZ];
+		u32 unicast;
+		u32 multicast;
+		u32 broadcast;
+		u32 excessive_collisions;
+		u32 tx_underruns;
+		u32 excessive_underruns;
+	} pktStats;
+	int txRingMask;		/* TX ring mask                           */
+	int rxRingMask;		/* RX ring mask                           */
+	s32 rx_rlen;		/* log2(rxRingMask+1) for the descriptors */
+	s32 tx_rlen;		/* log2(txRingMask+1) for the descriptors */
+};
+
+/*
+** The transmit ring full condition is described by the tx_old and tx_new
+** pointers by:
+**    tx_old            = tx_new    Empty ring
+**    tx_old            = tx_new+1  Full ring
+**    tx_old+txRingMask = tx_new    Full ring  (wrapped condition)
+*/
+#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
+			 lp->tx_old+lp->txRingMask-lp->tx_new:\
+                         lp->tx_old               -lp->tx_new-1)
+
+/*
+** Public Functions
+*/
+static int depca_open(struct net_device *dev);
+static netdev_tx_t depca_start_xmit(struct sk_buff *skb,
+				    struct net_device *dev);
+static irqreturn_t depca_interrupt(int irq, void *dev_id);
+static int depca_close(struct net_device *dev);
+static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+static void depca_tx_timeout(struct net_device *dev);
+static void set_multicast_list(struct net_device *dev);
+
+/*
+** Private functions
+*/
+static void depca_init_ring(struct net_device *dev);
+static int depca_rx(struct net_device *dev);
+static int depca_tx(struct net_device *dev);
+
+static void LoadCSRs(struct net_device *dev);
+static int InitRestartDepca(struct net_device *dev);
+static int DepcaSignature(char *name, u_long paddr);
+static int DevicePresent(u_long ioaddr);
+static int get_hw_addr(struct net_device *dev);
+static void SetMulticastFilter(struct net_device *dev);
+static int load_packet(struct net_device *dev, struct sk_buff *skb);
+static void depca_dbg_open(struct net_device *dev);
+
+static u_char de1xx_irq[] __initdata = { 2, 3, 4, 5, 7, 9, 0 };
+static u_char de2xx_irq[] __initdata = { 5, 9, 10, 11, 15, 0 };
+static u_char de422_irq[] __initdata = { 5, 9, 10, 11, 0 };
+static u_char *depca_irq;
+
+static int irq;
+static int io;
+static char *adapter_name;
+static int mem;			/* For loadable module assignment
+				   use insmod mem=0x????? .... */
+module_param (irq, int, 0);
+module_param (io, int, 0);
+module_param (adapter_name, charp, 0);
+module_param (mem, int, 0);
+MODULE_PARM_DESC(irq, "DEPCA IRQ number");
+MODULE_PARM_DESC(io, "DEPCA I/O base address");
+MODULE_PARM_DESC(adapter_name, "DEPCA adapter name");
+MODULE_PARM_DESC(mem, "DEPCA shared memory address");
+MODULE_LICENSE("GPL");
+
+/*
+** Miscellaneous defines...
+*/
+#define STOP_DEPCA \
+    outw(CSR0, DEPCA_ADDR);\
+    outw(STOP, DEPCA_DATA)
+
+static const struct net_device_ops depca_netdev_ops = {
+	.ndo_open 		= depca_open,
+	.ndo_start_xmit 	= depca_start_xmit,
+	.ndo_stop 		= depca_close,
+	.ndo_set_multicast_list = set_multicast_list,
+	.ndo_do_ioctl 		= depca_ioctl,
+	.ndo_tx_timeout 	= depca_tx_timeout,
+	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_set_mac_address 	= eth_mac_addr,
+	.ndo_validate_addr	= eth_validate_addr,
+};
+
+static int __init depca_hw_init (struct net_device *dev, struct device *device)
+{
+	struct depca_private *lp;
+	int i, j, offset, netRAM, mem_len, status = 0;
+	s16 nicsr;
+	u_long ioaddr;
+	u_long mem_start;
+
+	/*
+	 * We are now supposed to enter this function with the
+	 * following fields filled with proper values :
+	 *
+	 * dev->base_addr
+	 * lp->mem_start
+	 * lp->depca_bus
+	 * lp->adapter
+	 *
+	 * dev->irq can be set if known from device configuration (on
+	 * MCA or EISA) or module option. Otherwise, it will be auto
+	 * detected.
+	 */
+
+	ioaddr = dev->base_addr;
+
+	STOP_DEPCA;
+
+	nicsr = inb(DEPCA_NICSR);
+	nicsr = ((nicsr & ~SHE & ~RBE & ~IEN) | IM);
+	outb(nicsr, DEPCA_NICSR);
+
+	if (inw(DEPCA_DATA) != STOP) {
+		return -ENXIO;
+	}
+
+	lp = netdev_priv(dev);
+	mem_start = lp->mem_start;
+
+	if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
+		return -ENXIO;
+
+	printk("%s: %s at 0x%04lx",
+	       dev_name(device), depca_signature[lp->adapter], ioaddr);
+
+	switch (lp->depca_bus) {
+#ifdef CONFIG_MCA
+	case DEPCA_BUS_MCA:
+		printk(" (MCA slot %d)", to_mca_device(device)->slot + 1);
+		break;
+#endif
+
+#ifdef CONFIG_EISA
+	case DEPCA_BUS_EISA:
+		printk(" (EISA slot %d)", to_eisa_device(device)->slot);
+		break;
+#endif
+
+	case DEPCA_BUS_ISA:
+		break;
+
+	default:
+		printk("Unknown DEPCA bus %d\n", lp->depca_bus);
+		return -ENXIO;
+	}
+
+	printk(", h/w address ");
+	status = get_hw_addr(dev);
+	printk("%pM", dev->dev_addr);
+	if (status != 0) {
+		printk("      which has an Ethernet PROM CRC error.\n");
+		return -ENXIO;
+	}
+
+	/* Set up the maximum amount of network RAM(kB) */
+	netRAM = ((lp->adapter != DEPCA) ? 64 : 48);
+	if ((nicsr & _128KB) && (lp->adapter == de422))
+		netRAM = 128;
+
+	/* Shared Memory Base Address */
+	if (nicsr & BUF) {
+		nicsr &= ~BS;	/* DEPCA RAM in top 32k */
+		netRAM -= 32;
+
+		/* Only EISA/ISA needs start address to be re-computed */
+		if (lp->depca_bus != DEPCA_BUS_MCA)
+			mem_start += 0x8000;
+	}
+
+	if ((mem_len = (NUM_RX_DESC * (sizeof(struct depca_rx_desc) + RX_BUFF_SZ) + NUM_TX_DESC * (sizeof(struct depca_tx_desc) + TX_BUFF_SZ) + sizeof(struct depca_init)))
+	    > (netRAM << 10)) {
+		printk(",\n       requests %dkB RAM: only %dkB is available!\n", (mem_len >> 10), netRAM);
+		return -ENXIO;
+	}
+
+	printk(",\n      has %dkB RAM at 0x%.5lx", netRAM, mem_start);
+
+	/* Enable the shadow RAM. */
+	if (lp->adapter != DEPCA) {
+		nicsr |= SHE;
+		outb(nicsr, DEPCA_NICSR);
+	}
+
+	spin_lock_init(&lp->lock);
+	sprintf(lp->adapter_name, "%s (%s)",
+		depca_signature[lp->adapter], dev_name(device));
+	status = -EBUSY;
+
+	/* Initialisation Block */
+	if (!request_mem_region (mem_start, mem_len, lp->adapter_name)) {
+		printk(KERN_ERR "depca: cannot request ISA memory, aborting\n");
+		goto out_priv;
+	}
+
+	status = -EIO;
+	lp->sh_mem = ioremap(mem_start, mem_len);
+	if (lp->sh_mem == NULL) {
+		printk(KERN_ERR "depca: cannot remap ISA memory, aborting\n");
+		goto out1;
+	}
+
+	lp->mem_start = mem_start;
+	lp->mem_len   = mem_len;
+	lp->device_ram_start = mem_start & LA_MASK;
+
+	offset = 0;
+	offset += sizeof(struct depca_init);
+
+	/* Tx & Rx descriptors (aligned to a quadword boundary) */
+	offset = (offset + DEPCA_ALIGN) & ~DEPCA_ALIGN;
+	lp->rx_ring = lp->sh_mem + offset;
+	lp->rx_ring_offset = offset;
+
+	offset += (sizeof(struct depca_rx_desc) * NUM_RX_DESC);
+	lp->tx_ring = lp->sh_mem + offset;
+	lp->tx_ring_offset = offset;
+
+	offset += (sizeof(struct depca_tx_desc) * NUM_TX_DESC);
+
+	lp->buffs_offset = offset;
+
+	/* Finish initialising the ring information. */
+	lp->rxRingMask = NUM_RX_DESC - 1;
+	lp->txRingMask = NUM_TX_DESC - 1;
+
+	/* Calculate Tx/Rx RLEN size for the descriptors. */
+	for (i = 0, j = lp->rxRingMask; j > 0; i++) {
+		j >>= 1;
+	}
+	lp->rx_rlen = (s32) (i << 29);
+	for (i = 0, j = lp->txRingMask; j > 0; i++) {
+		j >>= 1;
+	}
+	lp->tx_rlen = (s32) (i << 29);
+
+	/* Load the initialisation block */
+	depca_init_ring(dev);
+
+	/* Initialise the control and status registers */
+	LoadCSRs(dev);
+
+	/* Enable DEPCA board interrupts for autoprobing */
+	nicsr = ((nicsr & ~IM) | IEN);
+	outb(nicsr, DEPCA_NICSR);
+
+	/* To auto-IRQ we enable the initialization-done and DMA err,
+	   interrupts. For now we will always get a DMA error. */
+	if (dev->irq < 2) {
+		unsigned char irqnum;
+		unsigned long irq_mask, delay;
+
+		irq_mask = probe_irq_on();
+
+		/* Assign the correct irq list */
+		switch (lp->adapter) {
+		case DEPCA:
+		case de100:
+		case de101:
+			depca_irq = de1xx_irq;
+			break;
+		case de200:
+		case de201:
+		case de202:
+		case de210:
+		case de212:
+			depca_irq = de2xx_irq;
+			break;
+		case de422:
+			depca_irq = de422_irq;
+			break;
+
+		default:
+			break;	/* Not reached */
+		}
+
+		/* Trigger an initialization just for the interrupt. */
+		outw(INEA | INIT, DEPCA_DATA);
+
+		delay = jiffies + HZ/50;
+		while (time_before(jiffies, delay))
+			yield();
+
+		irqnum = probe_irq_off(irq_mask);
+
+		status = -ENXIO;
+		if (!irqnum) {
+			printk(" and failed to detect IRQ line.\n");
+			goto out2;
+		} else {
+			for (dev->irq = 0, i = 0; (depca_irq[i]) && (!dev->irq); i++)
+				if (irqnum == depca_irq[i]) {
+					dev->irq = irqnum;
+					printk(" and uses IRQ%d.\n", dev->irq);
+				}
+
+			if (!dev->irq) {
+				printk(" but incorrect IRQ line detected.\n");
+				goto out2;
+			}
+		}
+	} else {
+		printk(" and assigned IRQ%d.\n", dev->irq);
+	}
+
+	if (depca_debug > 1) {
+		printk(version);
+	}
+
+	/* The DEPCA-specific entries in the device structure. */
+	dev->netdev_ops = &depca_netdev_ops;
+	dev->watchdog_timeo = TX_TIMEOUT;
+
+	dev->mem_start = 0;
+
+	dev_set_drvdata(device, dev);
+	SET_NETDEV_DEV (dev, device);
+
+	status = register_netdev(dev);
+	if (status == 0)
+		return 0;
+out2:
+	iounmap(lp->sh_mem);
+out1:
+	release_mem_region (mem_start, mem_len);
+out_priv:
+	return status;
+}
+
+
+static int depca_open(struct net_device *dev)
+{
+	struct depca_private *lp = netdev_priv(dev);
+	u_long ioaddr = dev->base_addr;
+	s16 nicsr;
+	int status = 0;
+
+	STOP_DEPCA;
+	nicsr = inb(DEPCA_NICSR);
+
+	/* Make sure the shadow RAM is enabled */
+	if (lp->adapter != DEPCA) {
+		nicsr |= SHE;
+		outb(nicsr, DEPCA_NICSR);
+	}
+
+	/* Re-initialize the DEPCA... */
+	depca_init_ring(dev);
+	LoadCSRs(dev);
+
+	depca_dbg_open(dev);
+
+	if (request_irq(dev->irq, depca_interrupt, 0, lp->adapter_name, dev)) {
+		printk("depca_open(): Requested IRQ%d is busy\n", dev->irq);
+		status = -EAGAIN;
+	} else {
+
+		/* Enable DEPCA board interrupts and turn off LED */
+		nicsr = ((nicsr & ~IM & ~LED) | IEN);
+		outb(nicsr, DEPCA_NICSR);
+		outw(CSR0, DEPCA_ADDR);
+
+		netif_start_queue(dev);
+
+		status = InitRestartDepca(dev);
+
+		if (depca_debug > 1) {
+			printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA));
+			printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR));
+		}
+	}
+	return status;
+}
+
+/* Initialize the lance Rx and Tx descriptor rings. */
+static void depca_init_ring(struct net_device *dev)
+{
+	struct depca_private *lp = netdev_priv(dev);
+	u_int i;
+	u_long offset;
+
+	/* Lock out other processes whilst setting up the hardware */
+	netif_stop_queue(dev);
+
+	lp->rx_new = lp->tx_new = 0;
+	lp->rx_old = lp->tx_old = 0;
+
+	/* Initialize the base address and length of each buffer in the ring */
+	for (i = 0; i <= lp->rxRingMask; i++) {
+		offset = lp->buffs_offset + i * RX_BUFF_SZ;
+		writel((lp->device_ram_start + offset) | R_OWN, &lp->rx_ring[i].base);
+		writew(-RX_BUFF_SZ, &lp->rx_ring[i].buf_length);
+		lp->rx_buff[i] = lp->sh_mem + offset;
+	}
+
+	for (i = 0; i <= lp->txRingMask; i++) {
+		offset = lp->buffs_offset + (i + lp->rxRingMask + 1) * TX_BUFF_SZ;
+		writel((lp->device_ram_start + offset) & 0x00ffffff, &lp->tx_ring[i].base);
+		lp->tx_buff[i] = lp->sh_mem + offset;
+	}
+
+	/* Set up the initialization block */
+	lp->init_block.rx_ring = (lp->device_ram_start + lp->rx_ring_offset) | lp->rx_rlen;
+	lp->init_block.tx_ring = (lp->device_ram_start + lp->tx_ring_offset) | lp->tx_rlen;
+
+	SetMulticastFilter(dev);
+
+	for (i = 0; i < ETH_ALEN; i++) {
+		lp->init_block.phys_addr[i] = dev->dev_addr[i];
+	}
+
+	lp->init_block.mode = 0x0000;	/* Enable the Tx and Rx */
+}
+
+
+static void depca_tx_timeout(struct net_device *dev)
+{
+	u_long ioaddr = dev->base_addr;
+
+	printk("%s: transmit timed out, status %04x, resetting.\n", dev->name, inw(DEPCA_DATA));
+
+	STOP_DEPCA;
+	depca_init_ring(dev);
+	LoadCSRs(dev);
+	dev->trans_start = jiffies; /* prevent tx timeout */
+	netif_wake_queue(dev);
+	InitRestartDepca(dev);
+}
+
+
+/*
+** Writes a socket buffer to TX descriptor ring and starts transmission
+*/
+static netdev_tx_t depca_start_xmit(struct sk_buff *skb,
+				    struct net_device *dev)
+{
+	struct depca_private *lp = netdev_priv(dev);
+	u_long ioaddr = dev->base_addr;
+	int status = 0;
+
+	/* Transmitter timeout, serious problems. */
+	if (skb->len < 1)
+		goto out;
+
+	if (skb_padto(skb, ETH_ZLEN))
+		goto out;
+
+	netif_stop_queue(dev);
+
+	if (TX_BUFFS_AVAIL) {	/* Fill in a Tx ring entry */
+		status = load_packet(dev, skb);
+
+		if (!status) {
+			/* Trigger an immediate send demand. */
+			outw(CSR0, DEPCA_ADDR);
+			outw(INEA | TDMD, DEPCA_DATA);
+
+			dev_kfree_skb(skb);
+		}
+		if (TX_BUFFS_AVAIL)
+			netif_start_queue(dev);
+	} else
+		status = NETDEV_TX_LOCKED;
+
+      out:
+	return status;
+}
+
+/*
+** The DEPCA interrupt handler.
+*/
+static irqreturn_t depca_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = dev_id;
+	struct depca_private *lp;
+	s16 csr0, nicsr;
+	u_long ioaddr;
+
+	if (dev == NULL) {
+		printk("depca_interrupt(): irq %d for unknown device.\n", irq);
+		return IRQ_NONE;
+	}
+
+	lp = netdev_priv(dev);
+	ioaddr = dev->base_addr;
+
+	spin_lock(&lp->lock);
+
+	/* mask the DEPCA board interrupts and turn on the LED */
+	nicsr = inb(DEPCA_NICSR);
+	nicsr |= (IM | LED);
+	outb(nicsr, DEPCA_NICSR);
+
+	outw(CSR0, DEPCA_ADDR);
+	csr0 = inw(DEPCA_DATA);
+
+	/* Acknowledge all of the current interrupt sources ASAP. */
+	outw(csr0 & INTE, DEPCA_DATA);
+
+	if (csr0 & RINT)	/* Rx interrupt (packet arrived) */
+		depca_rx(dev);
+
+	if (csr0 & TINT)	/* Tx interrupt (packet sent) */
+		depca_tx(dev);
+
+	/* Any resources available? */
+	if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
+		netif_wake_queue(dev);
+	}
+
+	/* Unmask the DEPCA board interrupts and turn off the LED */
+	nicsr = (nicsr & ~IM & ~LED);
+	outb(nicsr, DEPCA_NICSR);
+
+	spin_unlock(&lp->lock);
+	return IRQ_HANDLED;
+}
+
+/* Called with lp->lock held */
+static int depca_rx(struct net_device *dev)
+{
+	struct depca_private *lp = netdev_priv(dev);
+	int i, entry;
+	s32 status;
+
+	for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
+		status = readl(&lp->rx_ring[entry].base) >> 16;
+		if (status & R_STP) {	/* Remember start of frame */
+			lp->rx_old = entry;
+		}
+		if (status & R_ENP) {	/* Valid frame status */
+			if (status & R_ERR) {	/* There was an error. */
+				dev->stats.rx_errors++;	/* Update the error stats. */
+				if (status & R_FRAM)
+					dev->stats.rx_frame_errors++;
+				if (status & R_OFLO)
+					dev->stats.rx_over_errors++;
+				if (status & R_CRC)
+					dev->stats.rx_crc_errors++;
+				if (status & R_BUFF)
+					dev->stats.rx_fifo_errors++;
+			} else {
+				short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
+				struct sk_buff *skb;
+
+				skb = dev_alloc_skb(pkt_len + 2);
+				if (skb != NULL) {
+					unsigned char *buf;
+					skb_reserve(skb, 2);	/* 16 byte align the IP header */
+					buf = skb_put(skb, pkt_len);
+					if (entry < lp->rx_old) {	/* Wrapped buffer */
+						len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
+						memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
+						memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
+					} else {	/* Linear buffer */
+						memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
+					}
+
+					/*
+					   ** Notify the upper protocol layers that there is another
+					   ** packet to handle
+					 */
+					skb->protocol = eth_type_trans(skb, dev);
+					netif_rx(skb);
+
+					/*
+					   ** Update stats
+					 */
+					dev->stats.rx_packets++;
+					dev->stats.rx_bytes += pkt_len;
+					for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
+						if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
+							lp->pktStats.bins[i]++;
+							i = DEPCA_PKT_STAT_SZ;
+						}
+					}
+					if (is_multicast_ether_addr(buf)) {
+						if (is_broadcast_ether_addr(buf)) {
+							lp->pktStats.broadcast++;
+						} else {
+							lp->pktStats.multicast++;
+						}
+					} else if (compare_ether_addr(buf, dev->dev_addr) == 0) {
+						lp->pktStats.unicast++;
+					}
+
+					lp->pktStats.bins[0]++;	/* Duplicates stats.rx_packets */
+					if (lp->pktStats.bins[0] == 0) {	/* Reset counters */
+						memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
+					}
+				} else {
+					printk("%s: Memory squeeze, deferring packet.\n", dev->name);
+					dev->stats.rx_dropped++;	/* Really, deferred. */
+					break;
+				}
+			}
+			/* Change buffer ownership for this last frame, back to the adapter */
+			for (; lp->rx_old != entry; lp->rx_old = (lp->rx_old + 1) & lp->rxRingMask) {
+				writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
+			}
+			writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
+		}
+
+		/*
+		   ** Update entry information
+		 */
+		lp->rx_new = (lp->rx_new + 1) & lp->rxRingMask;
+	}
+
+	return 0;
+}
+
+/*
+** Buffer sent - check for buffer errors.
+** Called with lp->lock held
+*/
+static int depca_tx(struct net_device *dev)
+{
+	struct depca_private *lp = netdev_priv(dev);
+	int entry;
+	s32 status;
+	u_long ioaddr = dev->base_addr;
+
+	for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
+		status = readl(&lp->tx_ring[entry].base) >> 16;
+
+		if (status < 0) {	/* Packet not yet sent! */
+			break;
+		} else if (status & T_ERR) {	/* An error occurred. */
+			status = readl(&lp->tx_ring[entry].misc);
+			dev->stats.tx_errors++;
+			if (status & TMD3_RTRY)
+				dev->stats.tx_aborted_errors++;
+			if (status & TMD3_LCAR)
+				dev->stats.tx_carrier_errors++;
+			if (status & TMD3_LCOL)
+				dev->stats.tx_window_errors++;
+			if (status & TMD3_UFLO)
+				dev->stats.tx_fifo_errors++;
+			if (status & (TMD3_BUFF | TMD3_UFLO)) {
+				/* Trigger an immediate send demand. */
+				outw(CSR0, DEPCA_ADDR);
+				outw(INEA | TDMD, DEPCA_DATA);
+			}
+		} else if (status & (T_MORE | T_ONE)) {
+			dev->stats.collisions++;
+		} else {
+			dev->stats.tx_packets++;
+		}
+
+		/* Update all the pointers */
+		lp->tx_old = (lp->tx_old + 1) & lp->txRingMask;
+	}
+
+	return 0;
+}
+
+static int depca_close(struct net_device *dev)
+{
+	struct depca_private *lp = netdev_priv(dev);
+	s16 nicsr;
+	u_long ioaddr = dev->base_addr;
+
+	netif_stop_queue(dev);
+
+	outw(CSR0, DEPCA_ADDR);
+
+	if (depca_debug > 1) {
+		printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
+	}
+
+	/*
+	   ** We stop the DEPCA here -- it occasionally polls
+	   ** memory if we don't.
+	 */
+	outw(STOP, DEPCA_DATA);
+
+	/*
+	   ** Give back the ROM in case the user wants to go to DOS
+	 */
+	if (lp->adapter != DEPCA) {
+		nicsr = inb(DEPCA_NICSR);
+		nicsr &= ~SHE;
+		outb(nicsr, DEPCA_NICSR);
+	}
+
+	/*
+	   ** Free the associated irq
+	 */
+	free_irq(dev->irq, dev);
+	return 0;
+}
+
+static void LoadCSRs(struct net_device *dev)
+{
+	struct depca_private *lp = netdev_priv(dev);
+	u_long ioaddr = dev->base_addr;
+
+	outw(CSR1, DEPCA_ADDR);	/* initialisation block address LSW */
+	outw((u16) lp->device_ram_start, DEPCA_DATA);
+	outw(CSR2, DEPCA_ADDR);	/* initialisation block address MSW */
+	outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
+	outw(CSR3, DEPCA_ADDR);	/* ALE control */
+	outw(ACON, DEPCA_DATA);
+
+	outw(CSR0, DEPCA_ADDR);	/* Point back to CSR0 */
+}
+
+static int InitRestartDepca(struct net_device *dev)
+{
+	struct depca_private *lp = netdev_priv(dev);
+	u_long ioaddr = dev->base_addr;
+	int i, status = 0;
+
+	/* Copy the shadow init_block to shared memory */
+	memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
+
+	outw(CSR0, DEPCA_ADDR);	/* point back to CSR0 */
+	outw(INIT, DEPCA_DATA);	/* initialize DEPCA */
+
+	/* wait for lance to complete initialisation */
+	for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
+
+	if (i != 100) {
+		/* clear IDON by writing a "1", enable interrupts and start lance */
+		outw(IDON | INEA | STRT, DEPCA_DATA);
+		if (depca_debug > 2) {
+			printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
+		}
+	} else {
+		printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
+		status = -1;
+	}
+
+	return status;
+}
+
+/*
+** Set or clear the multicast filter for this adaptor.
+*/
+static void set_multicast_list(struct net_device *dev)
+{
+	struct depca_private *lp = netdev_priv(dev);
+	u_long ioaddr = dev->base_addr;
+
+	netif_stop_queue(dev);
+	while (lp->tx_old != lp->tx_new);	/* Wait for the ring to empty */
+
+	STOP_DEPCA;	/* Temporarily stop the depca.  */
+	depca_init_ring(dev);	/* Initialize the descriptor rings */
+
+	if (dev->flags & IFF_PROMISC) {	/* Set promiscuous mode */
+		lp->init_block.mode |= PROM;
+	} else {
+		SetMulticastFilter(dev);
+		lp->init_block.mode &= ~PROM;	/* Unset promiscuous mode */
+	}
+
+	LoadCSRs(dev);	/* Reload CSR3 */
+	InitRestartDepca(dev);	/* Resume normal operation. */
+	netif_start_queue(dev);	/* Unlock the TX ring */
+}
+
+/*
+** Calculate the hash code and update the logical address filter
+** from a list of ethernet multicast addresses.
+** Big endian crc one liner is mine, all mine, ha ha ha ha!
+** LANCE calculates its hash codes big endian.
+*/
+static void SetMulticastFilter(struct net_device *dev)
+{
+	struct depca_private *lp = netdev_priv(dev);
+	struct netdev_hw_addr *ha;
+	int i, j, bit, byte;
+	u16 hashcode;
+	u32 crc;
+
+	if (dev->flags & IFF_ALLMULTI) {	/* Set all multicast bits */
+		for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
+			lp->init_block.mcast_table[i] = (char) 0xff;
+		}
+	} else {
+		for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {	/* Clear the multicast table */
+			lp->init_block.mcast_table[i] = 0;
+		}
+		/* Add multicast addresses */
+		netdev_for_each_mc_addr(ha, dev) {
+			crc = ether_crc(ETH_ALEN, ha->addr);
+			hashcode = (crc & 1);	/* hashcode is 6 LSb of CRC ... */
+			for (j = 0; j < 5; j++) {	/* ... in reverse order. */
+				hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
+			}
+
+			byte = hashcode >> 3;	/* bit[3-5] -> byte in filter */
+			bit = 1 << (hashcode & 0x07);	/* bit[0-2] -> bit in byte */
+			lp->init_block.mcast_table[byte] |= bit;
+		}
+	}
+}
+
+static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
+{
+	int status = 0;
+
+	if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
+		status = -EBUSY;
+		goto out;
+	}
+
+	if (DevicePresent(ioaddr)) {
+		status = -ENODEV;
+		goto out_release;
+	}
+
+	if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
+		status = -ENOMEM;
+		goto out_release;
+	}
+
+	return 0;
+
+ out_release:
+	release_region (ioaddr, DEPCA_TOTAL_SIZE);
+ out:
+	return status;
+}
+
+#ifdef CONFIG_MCA
+/*
+** Microchannel bus I/O device probe
+*/
+static int __init depca_mca_probe(struct device *device)
+{
+	unsigned char pos[2];
+	unsigned char where;
+	unsigned long iobase, mem_start;
+	int irq, err;
+	struct mca_device *mdev = to_mca_device (device);
+	struct net_device *dev;
+	struct depca_private *lp;
+
+	/*
+	** Search for the adapter.  If an address has been given, search
+	** specifically for the card at that address.  Otherwise find the
+	** first card in the system.
+	*/
+
+	pos[0] = mca_device_read_stored_pos(mdev, 2);
+	pos[1] = mca_device_read_stored_pos(mdev, 3);
+
+	/*
+	** IO of card is handled by bits 1 and 2 of pos0.
+	**
+	**    bit2 bit1    IO
+	**       0    0    0x2c00
+	**       0    1    0x2c10
+	**       1    0    0x2c20
+	**       1    1    0x2c30
+	*/
+	where = (pos[0] & 6) >> 1;
+	iobase = 0x2c00 + (0x10 * where);
+
+	/*
+	** Found the adapter we were looking for. Now start setting it up.
+	**
+	** First work on decoding the IRQ.  It's stored in the lower 4 bits
+	** of pos1.  Bits are as follows (from the ADF file):
+	**
+	**      Bits
+	**   3   2   1   0    IRQ
+	**   --------------------
+	**   0   0   1   0     5
+	**   0   0   0   1     9
+	**   0   1   0   0    10
+	**   1   0   0   0    11
+	*/
+	where = pos[1] & 0x0f;
+	switch (where) {
+	case 1:
+		irq = 9;
+		break;
+	case 2:
+		irq = 5;
+		break;
+	case 4:
+		irq = 10;
+		break;
+	case 8:
+		irq = 11;
+		break;
+	default:
+		printk("%s: mca_probe IRQ error.  You should never get here (%d).\n", mdev->name, where);
+		return -EINVAL;
+	}
+
+	/*
+	** Shared memory address of adapter is stored in bits 3-5 of pos0.
+	** They are mapped as follows:
+	**
+	**    Bit
+	**   5  4  3       Memory Addresses
+	**   0  0  0       C0000-CFFFF (64K)
+	**   1  0  0       C8000-CFFFF (32K)
+	**   0  0  1       D0000-DFFFF (64K)
+	**   1  0  1       D8000-DFFFF (32K)
+	**   0  1  0       E0000-EFFFF (64K)
+	**   1  1  0       E8000-EFFFF (32K)
+	*/
+	where = (pos[0] & 0x18) >> 3;
+	mem_start = 0xc0000 + (where * 0x10000);
+	if (pos[0] & 0x20) {
+		mem_start += 0x8000;
+	}
+
+	/* claim the slot */
+	strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
+		sizeof(mdev->name));
+	mca_device_set_claim(mdev, 1);
+
+        /*
+	** Get everything allocated and initialized...  (almost just
+	** like the ISA and EISA probes)
+	*/
+	irq = mca_device_transform_irq(mdev, irq);
+	iobase = mca_device_transform_ioport(mdev, iobase);
+
+	if ((err = depca_common_init (iobase, &dev)))
+		goto out_unclaim;
+
+	dev->irq = irq;
+	dev->base_addr = iobase;
+	lp = netdev_priv(dev);
+	lp->depca_bus = DEPCA_BUS_MCA;
+	lp->adapter = depca_mca_adapter_type[mdev->index];
+	lp->mem_start = mem_start;
+
+	if ((err = depca_hw_init(dev, device)))
+		goto out_free;
+
+	return 0;
+
+ out_free:
+	free_netdev (dev);
+	release_region (iobase, DEPCA_TOTAL_SIZE);
+ out_unclaim:
+	mca_device_set_claim(mdev, 0);
+
+	return err;
+}
+#endif
+
+/*
+** ISA bus I/O device probe
+*/
+
+static void __init depca_platform_probe (void)
+{
+	int i;
+	struct platform_device *pldev;
+
+	for (i = 0; depca_io_ports[i].iobase; i++) {
+		depca_io_ports[i].device = NULL;
+
+		/* if an address has been specified on the command
+		 * line, use it (if valid) */
+		if (io && io != depca_io_ports[i].iobase)
+			continue;
+
+		pldev = platform_device_alloc(depca_string, i);
+		if (!pldev)
+			continue;
+
+		pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
+		depca_io_ports[i].device = pldev;
+
+		if (platform_device_add(pldev)) {
+			depca_io_ports[i].device = NULL;
+			pldev->dev.platform_data = NULL;
+			platform_device_put(pldev);
+			continue;
+		}
+
+		if (!pldev->dev.driver) {
+		/* The driver was not bound to this device, there was
+		 * no hardware at this address. Unregister it, as the
+		 * release function will take care of freeing the
+		 * allocated structure */
+
+			depca_io_ports[i].device = NULL;
+			pldev->dev.platform_data = NULL;
+			platform_device_unregister (pldev);
+		}
+	}
+}
+
+static enum depca_type __init depca_shmem_probe (ulong *mem_start)
+{
+	u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
+	enum depca_type adapter = unknown;
+	int i;
+
+	for (i = 0; mem_base[i]; i++) {
+		*mem_start = mem ? mem : mem_base[i];
+		adapter = DepcaSignature (adapter_name, *mem_start);
+		if (adapter != unknown)
+			break;
+	}
+
+	return adapter;
+}
+
+static int __devinit depca_isa_probe (struct platform_device *device)
+{
+	struct net_device *dev;
+	struct depca_private *lp;
+	u_long ioaddr, mem_start = 0;
+	enum depca_type adapter = unknown;
+	int status = 0;
+
+	ioaddr = (u_long) device->dev.platform_data;
+
+	if ((status = depca_common_init (ioaddr, &dev)))
+		goto out;
+
+	adapter = depca_shmem_probe (&mem_start);
+
+	if (adapter == unknown) {
+		status = -ENODEV;
+		goto out_free;
+	}
+
+	dev->base_addr = ioaddr;
+	dev->irq = irq;		/* Use whatever value the user gave
+				 * us, and 0 if he didn't. */
+	lp = netdev_priv(dev);
+	lp->depca_bus = DEPCA_BUS_ISA;
+	lp->adapter = adapter;
+	lp->mem_start = mem_start;
+
+	if ((status = depca_hw_init(dev, &device->dev)))
+		goto out_free;
+
+	return 0;
+
+ out_free:
+	free_netdev (dev);
+	release_region (ioaddr, DEPCA_TOTAL_SIZE);
+ out:
+	return status;
+}
+
+/*
+** EISA callbacks from sysfs.
+*/
+
+#ifdef CONFIG_EISA
+static int __init depca_eisa_probe (struct device *device)
+{
+	enum depca_type adapter = unknown;
+	struct eisa_device *edev;
+	struct net_device *dev;
+	struct depca_private *lp;
+	u_long ioaddr, mem_start;
+	int status = 0;
+
+	edev = to_eisa_device (device);
+	ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
+
+	if ((status = depca_common_init (ioaddr, &dev)))
+		goto out;
+
+	/* It would have been nice to get card configuration from the
+	 * card. Unfortunately, this register is write-only (shares
+	 * it's address with the ethernet prom)... As we don't parse
+	 * the EISA configuration structures (yet... :-), just rely on
+	 * the ISA probing to sort it out... */
+
+	adapter = depca_shmem_probe (&mem_start);
+	if (adapter == unknown) {
+		status = -ENODEV;
+		goto out_free;
+	}
+
+	dev->base_addr = ioaddr;
+	dev->irq = irq;
+	lp = netdev_priv(dev);
+	lp->depca_bus = DEPCA_BUS_EISA;
+	lp->adapter = edev->id.driver_data;
+	lp->mem_start = mem_start;
+
+	if ((status = depca_hw_init(dev, device)))
+		goto out_free;
+
+	return 0;
+
+ out_free:
+	free_netdev (dev);
+	release_region (ioaddr, DEPCA_TOTAL_SIZE);
+ out:
+	return status;
+}
+#endif
+
+static int __devexit depca_device_remove (struct device *device)
+{
+	struct net_device *dev;
+	struct depca_private *lp;
+	int bus;
+
+	dev  = dev_get_drvdata(device);
+	lp   = netdev_priv(dev);
+
+	unregister_netdev (dev);
+	iounmap (lp->sh_mem);
+	release_mem_region (lp->mem_start, lp->mem_len);
+	release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
+	bus = lp->depca_bus;
+	free_netdev (dev);
+
+	return 0;
+}
+
+/*
+** Look for a particular board name in the on-board Remote Diagnostics
+** and Boot (readb) ROM. This will also give us a clue to the network RAM
+** base address.
+*/
+static int __init DepcaSignature(char *name, u_long base_addr)
+{
+	u_int i, j, k;
+	void __iomem *ptr;
+	char tmpstr[16];
+	u_long prom_addr = base_addr + 0xc000;
+	u_long mem_addr = base_addr + 0x8000; /* 32KB */
+
+	/* Can't reserve the prom region, it is already marked as
+	 * used, at least on x86. Instead, reserve a memory region a
+	 * board would certainly use. If it works, go ahead. If not,
+	 * run like hell... */
+
+	if (!request_mem_region (mem_addr, 16, depca_string))
+		return unknown;
+
+	/* Copy the first 16 bytes of ROM */
+
+	ptr = ioremap(prom_addr, 16);
+	if (ptr == NULL) {
+		printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
+		return unknown;
+	}
+	for (i = 0; i < 16; i++) {
+		tmpstr[i] = readb(ptr + i);
+	}
+	iounmap(ptr);
+
+	release_mem_region (mem_addr, 16);
+
+	/* Check if PROM contains a valid string */
+	for (i = 0; *depca_signature[i] != '\0'; i++) {
+		for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
+			if (depca_signature[i][k] == tmpstr[j]) {	/* track signature */
+				k++;
+			} else {	/* lost signature; begin search again */
+				k = 0;
+			}
+		}
+		if (k == strlen(depca_signature[i]))
+			break;
+	}
+
+	/* Check if name string is valid, provided there's no PROM */
+	if (name && *name && (i == unknown)) {
+		for (i = 0; *depca_signature[i] != '\0'; i++) {
+			if (strcmp(name, depca_signature[i]) == 0)
+				break;
+		}
+	}
+
+	return i;
+}
+
+/*
+** Look for a special sequence in the Ethernet station address PROM that
+** is common across all DEPCA products. Note that the original DEPCA needs
+** its ROM address counter to be initialized and enabled. Only enable
+** if the first address octet is a 0x08 - this minimises the chances of
+** messing around with some other hardware, but it assumes that this DEPCA
+** card initialized itself correctly.
+**
+** Search the Ethernet address ROM for the signature. Since the ROM address
+** counter can start at an arbitrary point, the search must include the entire
+** probe sequence length plus the (length_of_the_signature - 1).
+** Stop the search IMMEDIATELY after the signature is found so that the
+** PROM address counter is correctly positioned at the start of the
+** ethernet address for later read out.
+*/
+static int __init DevicePresent(u_long ioaddr)
+{
+	union {
+		struct {
+			u32 a;
+			u32 b;
+		} llsig;
+		char Sig[sizeof(u32) << 1];
+	}
+	dev;
+	short sigLength = 0;
+	s8 data;
+	s16 nicsr;
+	int i, j, status = 0;
+
+	data = inb(DEPCA_PROM);	/* clear counter on DEPCA */
+	data = inb(DEPCA_PROM);	/* read data */
+
+	if (data == 0x08) {	/* Enable counter on DEPCA */
+		nicsr = inb(DEPCA_NICSR);
+		nicsr |= AAC;
+		outb(nicsr, DEPCA_NICSR);
+	}
+
+	dev.llsig.a = ETH_PROM_SIG;
+	dev.llsig.b = ETH_PROM_SIG;
+	sigLength = sizeof(u32) << 1;
+
+	for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
+		data = inb(DEPCA_PROM);
+		if (dev.Sig[j] == data) {	/* track signature */
+			j++;
+		} else {	/* lost signature; begin search again */
+			if (data == dev.Sig[0]) {	/* rare case.... */
+				j = 1;
+			} else {
+				j = 0;
+			}
+		}
+	}
+
+	if (j != sigLength) {
+		status = -ENODEV;	/* search failed */
+	}
+
+	return status;
+}
+
+/*
+** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
+** reason: access the upper half of the PROM with x=0; access the lower half
+** with x=1.
+*/
+static int __init get_hw_addr(struct net_device *dev)
+{
+	u_long ioaddr = dev->base_addr;
+	struct depca_private *lp = netdev_priv(dev);
+	int i, k, tmp, status = 0;
+	u_short j, x, chksum;
+
+	x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
+
+	for (i = 0, k = 0, j = 0; j < 3; j++) {
+		k <<= 1;
+		if (k > 0xffff)
+			k -= 0xffff;
+
+		k += (u_char) (tmp = inb(DEPCA_PROM + x));
+		dev->dev_addr[i++] = (u_char) tmp;
+		k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
+		dev->dev_addr[i++] = (u_char) tmp;
+
+		if (k > 0xffff)
+			k -= 0xffff;
+	}
+	if (k == 0xffff)
+		k = 0;
+
+	chksum = (u_char) inb(DEPCA_PROM + x);
+	chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
+	if (k != chksum)
+		status = -1;
+
+	return status;
+}
+
+/*
+** Load a packet into the shared memory
+*/
+static int load_packet(struct net_device *dev, struct sk_buff *skb)
+{
+	struct depca_private *lp = netdev_priv(dev);
+	int i, entry, end, len, status = NETDEV_TX_OK;
+
+	entry = lp->tx_new;	/* Ring around buffer number. */
+	end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
+	if (!(readl(&lp->tx_ring[end].base) & T_OWN)) {	/* Enough room? */
+		/*
+		   ** Caution: the write order is important here... don't set up the
+		   ** ownership rights until all the other information is in place.
+		 */
+		if (end < entry) {	/* wrapped buffer */
+			len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
+			memcpy_toio(lp->tx_buff[entry], skb->data, len);
+			memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
+		} else {	/* linear buffer */
+			memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
+		}
+
+		/* set up the buffer descriptors */
+		len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
+		for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
+			/* clean out flags */
+			writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
+			writew(0x0000, &lp->tx_ring[i].misc);	/* clears other error flags */
+			writew(-TX_BUFF_SZ, &lp->tx_ring[i].length);	/* packet length in buffer */
+			len -= TX_BUFF_SZ;
+		}
+		/* clean out flags */
+		writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
+		writew(0x0000, &lp->tx_ring[end].misc);	/* clears other error flags */
+		writew(-len, &lp->tx_ring[end].length);	/* packet length in last buff */
+
+		/* start of packet */
+		writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
+		/* end of packet */
+		writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
+
+		for (i = end; i != entry; --i) {
+			/* ownership of packet */
+			writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
+			if (i == 0)
+				i = lp->txRingMask + 1;
+		}
+		writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
+
+		lp->tx_new = (++end) & lp->txRingMask;	/* update current pointers */
+	} else {
+		status = NETDEV_TX_LOCKED;
+	}
+
+	return status;
+}
+
+static void depca_dbg_open(struct net_device *dev)
+{
+	struct depca_private *lp = netdev_priv(dev);
+	u_long ioaddr = dev->base_addr;
+	struct depca_init *p = &lp->init_block;
+	int i;
+
+	if (depca_debug > 1) {
+		/* Do not copy the shadow init block into shared memory */
+		/* Debugging should not affect normal operation! */
+		/* The shadow init block will get copied across during InitRestartDepca */
+		printk("%s: depca open with irq %d\n", dev->name, dev->irq);
+		printk("Descriptor head addresses (CPU):\n");
+		printk("        0x%lx  0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
+		printk("Descriptor addresses (CPU):\nRX: ");
+		for (i = 0; i < lp->rxRingMask; i++) {
+			if (i < 3) {
+				printk("%p ", &lp->rx_ring[i].base);
+			}
+		}
+		printk("...%p\n", &lp->rx_ring[i].base);
+		printk("TX: ");
+		for (i = 0; i < lp->txRingMask; i++) {
+			if (i < 3) {
+				printk("%p ", &lp->tx_ring[i].base);
+			}
+		}
+		printk("...%p\n", &lp->tx_ring[i].base);
+		printk("\nDescriptor buffers (Device):\nRX: ");
+		for (i = 0; i < lp->rxRingMask; i++) {
+			if (i < 3) {
+				printk("0x%8.8x  ", readl(&lp->rx_ring[i].base));
+			}
+		}
+		printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
+		printk("TX: ");
+		for (i = 0; i < lp->txRingMask; i++) {
+			if (i < 3) {
+				printk("0x%8.8x  ", readl(&lp->tx_ring[i].base));
+			}
+		}
+		printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
+		printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
+		printk("        mode: 0x%4.4x\n", p->mode);
+		printk("        physical address: %pM\n", p->phys_addr);
+		printk("        multicast hash table: ");
+		for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
+			printk("%2.2x:", p->mcast_table[i]);
+		}
+		printk("%2.2x\n", p->mcast_table[i]);
+		printk("        rx_ring at: 0x%8.8x\n", p->rx_ring);
+		printk("        tx_ring at: 0x%8.8x\n", p->tx_ring);
+		printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
+		printk("Ring size:\nRX: %d  Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
+		printk("TX: %d  Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
+		outw(CSR2, DEPCA_ADDR);
+		printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
+		outw(CSR1, DEPCA_ADDR);
+		printk("%4.4x\n", inw(DEPCA_DATA));
+		outw(CSR3, DEPCA_ADDR);
+		printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
+	}
+}
+
+/*
+** Perform IOCTL call functions here. Some are privileged operations and the
+** effective uid is checked in those cases.
+** All multicast IOCTLs will not work here and are for testing purposes only.
+*/
+static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	struct depca_private *lp = netdev_priv(dev);
+	struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
+	int i, status = 0;
+	u_long ioaddr = dev->base_addr;
+	union {
+		u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
+		u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
+		u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
+	} tmp;
+	unsigned long flags;
+	void *buf;
+
+	switch (ioc->cmd) {
+	case DEPCA_GET_HWADDR:	/* Get the hardware address */
+		for (i = 0; i < ETH_ALEN; i++) {
+			tmp.addr[i] = dev->dev_addr[i];
+		}
+		ioc->len = ETH_ALEN;
+		if (copy_to_user(ioc->data, tmp.addr, ioc->len))
+			return -EFAULT;
+		break;
+
+	case DEPCA_SET_HWADDR:	/* Set the hardware address */
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
+			return -EFAULT;
+		for (i = 0; i < ETH_ALEN; i++) {
+			dev->dev_addr[i] = tmp.addr[i];
+		}
+		netif_stop_queue(dev);
+		while (lp->tx_old != lp->tx_new)
+			cpu_relax();	/* Wait for the ring to empty */
+
+		STOP_DEPCA;	/* Temporarily stop the depca.  */
+		depca_init_ring(dev);	/* Initialize the descriptor rings */
+		LoadCSRs(dev);	/* Reload CSR3 */
+		InitRestartDepca(dev);	/* Resume normal operation. */
+		netif_start_queue(dev);	/* Unlock the TX ring */
+		break;
+
+	case DEPCA_SET_PROM:	/* Set Promiscuous Mode */
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		netif_stop_queue(dev);
+		while (lp->tx_old != lp->tx_new)
+			cpu_relax();	/* Wait for the ring to empty */
+
+		STOP_DEPCA;	/* Temporarily stop the depca.  */
+		depca_init_ring(dev);	/* Initialize the descriptor rings */
+		lp->init_block.mode |= PROM;	/* Set promiscuous mode */
+
+		LoadCSRs(dev);	/* Reload CSR3 */
+		InitRestartDepca(dev);	/* Resume normal operation. */
+		netif_start_queue(dev);	/* Unlock the TX ring */
+		break;
+
+	case DEPCA_CLR_PROM:	/* Clear Promiscuous Mode */
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		netif_stop_queue(dev);
+		while (lp->tx_old != lp->tx_new)
+			cpu_relax();	/* Wait for the ring to empty */
+
+		STOP_DEPCA;	/* Temporarily stop the depca.  */
+		depca_init_ring(dev);	/* Initialize the descriptor rings */
+		lp->init_block.mode &= ~PROM;	/* Clear promiscuous mode */
+
+		LoadCSRs(dev);	/* Reload CSR3 */
+		InitRestartDepca(dev);	/* Resume normal operation. */
+		netif_start_queue(dev);	/* Unlock the TX ring */
+		break;
+
+	case DEPCA_SAY_BOO:	/* Say "Boo!" to the kernel log file */
+		if(!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		printk("%s: Boo!\n", dev->name);
+		break;
+
+	case DEPCA_GET_MCA:	/* Get the multicast address table */
+		ioc->len = (HASH_TABLE_LEN >> 3);
+		if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
+			return -EFAULT;
+		break;
+
+	case DEPCA_SET_MCA:	/* Set a multicast address */
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		if (ioc->len >= HASH_TABLE_LEN)
+			return -EINVAL;
+		if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
+			return -EFAULT;
+		set_multicast_list(dev);
+		break;
+
+	case DEPCA_CLR_MCA:	/* Clear all multicast addresses */
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		set_multicast_list(dev);
+		break;
+
+	case DEPCA_MCA_EN:	/* Enable pass all multicast addressing */
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		set_multicast_list(dev);
+		break;
+
+	case DEPCA_GET_STATS:	/* Get the driver statistics */
+		ioc->len = sizeof(lp->pktStats);
+		buf = kmalloc(ioc->len, GFP_KERNEL);
+		if(!buf)
+			return -ENOMEM;
+		spin_lock_irqsave(&lp->lock, flags);
+		memcpy(buf, &lp->pktStats, ioc->len);
+		spin_unlock_irqrestore(&lp->lock, flags);
+		if (copy_to_user(ioc->data, buf, ioc->len))
+			status = -EFAULT;
+		kfree(buf);
+		break;
+
+	case DEPCA_CLR_STATS:	/* Zero out the driver statistics */
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		spin_lock_irqsave(&lp->lock, flags);
+		memset(&lp->pktStats, 0, sizeof(lp->pktStats));
+		spin_unlock_irqrestore(&lp->lock, flags);
+		break;
+
+	case DEPCA_GET_REG:	/* Get the DEPCA Registers */
+		i = 0;
+		tmp.sval[i++] = inw(DEPCA_NICSR);
+		outw(CSR0, DEPCA_ADDR);	/* status register */
+		tmp.sval[i++] = inw(DEPCA_DATA);
+		memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
+		ioc->len = i + sizeof(struct depca_init);
+		if (copy_to_user(ioc->data, tmp.addr, ioc->len))
+			return -EFAULT;
+		break;
+
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return status;
+}
+
+static int __init depca_module_init (void)
+{
+	int err = 0;
+
+#ifdef CONFIG_MCA
+	err = mca_register_driver(&depca_mca_driver);
+	if (err)
+		goto err;
+#endif
+#ifdef CONFIG_EISA
+	err = eisa_driver_register(&depca_eisa_driver);
+	if (err)
+		goto err_mca;
+#endif
+	err = platform_driver_register(&depca_isa_driver);
+	if (err)
+		goto err_eisa;
+
+	depca_platform_probe();
+	return 0;
+
+err_eisa:
+#ifdef CONFIG_EISA
+	eisa_driver_unregister(&depca_eisa_driver);
+err_mca:
+#endif
+#ifdef CONFIG_MCA
+	mca_unregister_driver(&depca_mca_driver);
+err:
+#endif
+	return err;
+}
+
+static void __exit depca_module_exit (void)
+{
+	int i;
+#ifdef CONFIG_MCA
+        mca_unregister_driver (&depca_mca_driver);
+#endif
+#ifdef CONFIG_EISA
+        eisa_driver_unregister (&depca_eisa_driver);
+#endif
+	platform_driver_unregister (&depca_isa_driver);
+
+	for (i = 0; depca_io_ports[i].iobase; i++) {
+		if (depca_io_ports[i].device) {
+			depca_io_ports[i].device->dev.platform_data = NULL;
+			platform_device_unregister (depca_io_ports[i].device);
+			depca_io_ports[i].device = NULL;
+		}
+	}
+}
+
+module_init (depca_module_init);
+module_exit (depca_module_exit);