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linux_dsm_epyc7002/drivers/net/smc9194.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

1628 lines
44 KiB
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/*------------------------------------------------------------------------
. smc9194.c
. This is a driver for SMC's 9000 series of Ethernet cards.
.
. Copyright (C) 1996 by Erik Stahlman
. This software may be used and distributed according to the terms
. of the GNU General Public License, incorporated herein by reference.
.
. "Features" of the SMC chip:
. 4608 byte packet memory. ( for the 91C92. Others have more )
. EEPROM for configuration
. AUI/TP selection ( mine has 10Base2/10BaseT select )
.
. Arguments:
. io = for the base address
. irq = for the IRQ
. ifport = 0 for autodetect, 1 for TP, 2 for AUI ( or 10base2 )
.
. author:
. Erik Stahlman ( erik@vt.edu )
. contributors:
. Arnaldo Carvalho de Melo <acme@conectiva.com.br>
.
. Hardware multicast code from Peter Cammaert ( pc@denkart.be )
.
. Sources:
. o SMC databook
. o skeleton.c by Donald Becker ( becker@scyld.com )
. o ( a LOT of advice from Becker as well )
.
. History:
. 12/07/95 Erik Stahlman written, got receive/xmit handled
. 01/03/96 Erik Stahlman worked out some bugs, actually usable!!! :-)
. 01/06/96 Erik Stahlman cleaned up some, better testing, etc
. 01/29/96 Erik Stahlman fixed autoirq, added multicast
. 02/01/96 Erik Stahlman 1. disabled all interrupts in smc_reset
. 2. got rid of post-decrementing bug -- UGH.
. 02/13/96 Erik Stahlman Tried to fix autoirq failure. Added more
. descriptive error messages.
. 02/15/96 Erik Stahlman Fixed typo that caused detection failure
. 02/23/96 Erik Stahlman Modified it to fit into kernel tree
. Added support to change hardware address
. Cleared stats on opens
. 02/26/96 Erik Stahlman Trial support for Kernel 1.2.13
. Kludge for automatic IRQ detection
. 03/04/96 Erik Stahlman Fixed kernel 1.3.70 +
. Fixed bug reported by Gardner Buchanan in
. smc_enable, with outw instead of outb
. 03/06/96 Erik Stahlman Added hardware multicast from Peter Cammaert
. 04/14/00 Heiko Pruessing (SMA Regelsysteme) Fixed bug in chip memory
. allocation
. 08/20/00 Arnaldo Melo fix kfree(skb) in smc_hardware_send_packet
. 12/15/00 Christian Jullien fix "Warning: kfree_skb on hard IRQ"
. 11/08/01 Matt Domsch Use common crc32 function
----------------------------------------------------------------------------*/
static const char version[] =
"smc9194.c:v0.14 12/15/00 by Erik Stahlman (erik@vt.edu)\n";
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/crc32.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/bitops.h>
#include <asm/io.h>
#include "smc9194.h"
#define DRV_NAME "smc9194"
/*------------------------------------------------------------------------
.
. Configuration options, for the experienced user to change.
.
-------------------------------------------------------------------------*/
/*
. Do you want to use 32 bit xfers? This should work on all chips, as
. the chipset is designed to accommodate them.
*/
#ifdef __sh__
#undef USE_32_BIT
#else
#define USE_32_BIT 1
#endif
#if defined(__H8300H__) || defined(__H8300S__)
#define NO_AUTOPROBE
#undef insl
#undef outsl
#define insl(a,b,l) io_insl_noswap(a,b,l)
#define outsl(a,b,l) io_outsl_noswap(a,b,l)
#endif
/*
.the SMC9194 can be at any of the following port addresses. To change,
.for a slightly different card, you can add it to the array. Keep in
.mind that the array must end in zero.
*/
struct devlist {
unsigned int port;
unsigned int irq;
};
#if defined(CONFIG_H8S_EDOSK2674)
static struct devlist smc_devlist[] __initdata = {
{.port = 0xf80000, .irq = 16},
{.port = 0, .irq = 0 },
};
#else
static struct devlist smc_devlist[] __initdata = {
{.port = 0x200, .irq = 0},
{.port = 0x220, .irq = 0},
{.port = 0x240, .irq = 0},
{.port = 0x260, .irq = 0},
{.port = 0x280, .irq = 0},
{.port = 0x2A0, .irq = 0},
{.port = 0x2C0, .irq = 0},
{.port = 0x2E0, .irq = 0},
{.port = 0x300, .irq = 0},
{.port = 0x320, .irq = 0},
{.port = 0x340, .irq = 0},
{.port = 0x360, .irq = 0},
{.port = 0x380, .irq = 0},
{.port = 0x3A0, .irq = 0},
{.port = 0x3C0, .irq = 0},
{.port = 0x3E0, .irq = 0},
{.port = 0, .irq = 0},
};
#endif
/*
. Wait time for memory to be free. This probably shouldn't be
. tuned that much, as waiting for this means nothing else happens
. in the system
*/
#define MEMORY_WAIT_TIME 16
/*
. DEBUGGING LEVELS
.
. 0 for normal operation
. 1 for slightly more details
. >2 for various levels of increasingly useless information
. 2 for interrupt tracking, status flags
. 3 for packet dumps, etc.
*/
#define SMC_DEBUG 0
#if (SMC_DEBUG > 2 )
#define PRINTK3(x) printk x
#else
#define PRINTK3(x)
#endif
#if SMC_DEBUG > 1
#define PRINTK2(x) printk x
#else
#define PRINTK2(x)
#endif
#ifdef SMC_DEBUG
#define PRINTK(x) printk x
#else
#define PRINTK(x)
#endif
/*------------------------------------------------------------------------
.
. The internal workings of the driver. If you are changing anything
. here with the SMC stuff, you should have the datasheet and known
. what you are doing.
.
-------------------------------------------------------------------------*/
#define CARDNAME "SMC9194"
/* store this information for the driver.. */
struct smc_local {
/*
these are things that the kernel wants me to keep, so users
can find out semi-useless statistics of how well the card is
performing
*/
struct net_device_stats stats;
/*
If I have to wait until memory is available to send
a packet, I will store the skbuff here, until I get the
desired memory. Then, I'll send it out and free it.
*/
struct sk_buff * saved_skb;
/*
. This keeps track of how many packets that I have
. sent out. When an TX_EMPTY interrupt comes, I know
. that all of these have been sent.
*/
int packets_waiting;
};
/*-----------------------------------------------------------------
.
. The driver can be entered at any of the following entry points.
.
.------------------------------------------------------------------ */
/*
. This is called by register_netdev(). It is responsible for
. checking the portlist for the SMC9000 series chipset. If it finds
. one, then it will initialize the device, find the hardware information,
. and sets up the appropriate device parameters.
. NOTE: Interrupts are *OFF* when this procedure is called.
.
. NB:This shouldn't be static since it is referred to externally.
*/
struct net_device *smc_init(int unit);
/*
. The kernel calls this function when someone wants to use the device,
. typically 'ifconfig ethX up'.
*/
static int smc_open(struct net_device *dev);
/*
. Our watchdog timed out. Called by the networking layer
*/
static void smc_timeout(struct net_device *dev);
/*
. This is called by the kernel in response to 'ifconfig ethX down'. It
. is responsible for cleaning up everything that the open routine
. does, and maybe putting the card into a powerdown state.
*/
static int smc_close(struct net_device *dev);
/*
. This routine allows the proc file system to query the driver's
. statistics.
*/
static struct net_device_stats * smc_query_statistics( struct net_device *dev);
/*
. Finally, a call to set promiscuous mode ( for TCPDUMP and related
. programs ) and multicast modes.
*/
static void smc_set_multicast_list(struct net_device *dev);
/*---------------------------------------------------------------
.
. Interrupt level calls..
.
----------------------------------------------------------------*/
/*
. Handles the actual interrupt
*/
static irqreturn_t smc_interrupt(int irq, void *);
/*
. This is a separate procedure to handle the receipt of a packet, to
. leave the interrupt code looking slightly cleaner
*/
static inline void smc_rcv( struct net_device *dev );
/*
. This handles a TX interrupt, which is only called when an error
. relating to a packet is sent.
*/
static inline void smc_tx( struct net_device * dev );
/*
------------------------------------------------------------
.
. Internal routines
.
------------------------------------------------------------
*/
/*
. Test if a given location contains a chip, trying to cause as
. little damage as possible if it's not a SMC chip.
*/
static int smc_probe(struct net_device *dev, int ioaddr);
/*
. A rather simple routine to print out a packet for debugging purposes.
*/
#if SMC_DEBUG > 2
static void print_packet( byte *, int );
#endif
#define tx_done(dev) 1
/* this is called to actually send the packet to the chip */
static void smc_hardware_send_packet( struct net_device * dev );
/* Since I am not sure if I will have enough room in the chip's ram
. to store the packet, I call this routine, which either sends it
. now, or generates an interrupt when the card is ready for the
. packet */
static int smc_wait_to_send_packet( struct sk_buff * skb, struct net_device *dev );
/* this does a soft reset on the device */
static void smc_reset( int ioaddr );
/* Enable Interrupts, Receive, and Transmit */
static void smc_enable( int ioaddr );
/* this puts the device in an inactive state */
static void smc_shutdown( int ioaddr );
/* This routine will find the IRQ of the driver if one is not
. specified in the input to the device. */
static int smc_findirq( int ioaddr );
/*
. Function: smc_reset( int ioaddr )
. Purpose:
. This sets the SMC91xx chip to its normal state, hopefully from whatever
. mess that any other DOS driver has put it in.
.
. Maybe I should reset more registers to defaults in here? SOFTRESET should
. do that for me.
.
. Method:
. 1. send a SOFT RESET
. 2. wait for it to finish
. 3. enable autorelease mode
. 4. reset the memory management unit
. 5. clear all interrupts
.
*/
static void smc_reset( int ioaddr )
{
/* This resets the registers mostly to defaults, but doesn't
affect EEPROM. That seems unnecessary */
SMC_SELECT_BANK( 0 );
outw( RCR_SOFTRESET, ioaddr + RCR );
/* this should pause enough for the chip to be happy */
SMC_DELAY( );
/* Set the transmit and receive configuration registers to
default values */
outw( RCR_CLEAR, ioaddr + RCR );
outw( TCR_CLEAR, ioaddr + TCR );
/* set the control register to automatically
release successfully transmitted packets, to make the best
use out of our limited memory */
SMC_SELECT_BANK( 1 );
outw( inw( ioaddr + CONTROL ) | CTL_AUTO_RELEASE , ioaddr + CONTROL );
/* Reset the MMU */
SMC_SELECT_BANK( 2 );
outw( MC_RESET, ioaddr + MMU_CMD );
/* Note: It doesn't seem that waiting for the MMU busy is needed here,
but this is a place where future chipsets _COULD_ break. Be wary
of issuing another MMU command right after this */
outb( 0, ioaddr + INT_MASK );
}
/*
. Function: smc_enable
. Purpose: let the chip talk to the outside work
. Method:
. 1. Enable the transmitter
. 2. Enable the receiver
. 3. Enable interrupts
*/
static void smc_enable( int ioaddr )
{
SMC_SELECT_BANK( 0 );
/* see the header file for options in TCR/RCR NORMAL*/
outw( TCR_NORMAL, ioaddr + TCR );
outw( RCR_NORMAL, ioaddr + RCR );
/* now, enable interrupts */
SMC_SELECT_BANK( 2 );
outb( SMC_INTERRUPT_MASK, ioaddr + INT_MASK );
}
/*
. Function: smc_shutdown
. Purpose: closes down the SMC91xxx chip.
. Method:
. 1. zero the interrupt mask
. 2. clear the enable receive flag
. 3. clear the enable xmit flags
.
. TODO:
. (1) maybe utilize power down mode.
. Why not yet? Because while the chip will go into power down mode,
. the manual says that it will wake up in response to any I/O requests
. in the register space. Empirical results do not show this working.
*/
static void smc_shutdown( int ioaddr )
{
/* no more interrupts for me */
SMC_SELECT_BANK( 2 );
outb( 0, ioaddr + INT_MASK );
/* and tell the card to stay away from that nasty outside world */
SMC_SELECT_BANK( 0 );
outb( RCR_CLEAR, ioaddr + RCR );
outb( TCR_CLEAR, ioaddr + TCR );
#if 0
/* finally, shut the chip down */
SMC_SELECT_BANK( 1 );
outw( inw( ioaddr + CONTROL ), CTL_POWERDOWN, ioaddr + CONTROL );
#endif
}
/*
. Function: smc_setmulticast( int ioaddr, int count, dev_mc_list * adds )
. Purpose:
. This sets the internal hardware table to filter out unwanted multicast
. packets before they take up memory.
.
. The SMC chip uses a hash table where the high 6 bits of the CRC of
. address are the offset into the table. If that bit is 1, then the
. multicast packet is accepted. Otherwise, it's dropped silently.
.
. To use the 6 bits as an offset into the table, the high 3 bits are the
. number of the 8 bit register, while the low 3 bits are the bit within
. that register.
.
. This routine is based very heavily on the one provided by Peter Cammaert.
*/
static void smc_setmulticast( int ioaddr, int count, struct dev_mc_list * addrs ) {
int i;
unsigned char multicast_table[ 8 ];
struct dev_mc_list * cur_addr;
/* table for flipping the order of 3 bits */
unsigned char invert3[] = { 0, 4, 2, 6, 1, 5, 3, 7 };
/* start with a table of all zeros: reject all */
memset( multicast_table, 0, sizeof( multicast_table ) );
cur_addr = addrs;
for ( i = 0; i < count ; i ++, cur_addr = cur_addr->next ) {
int position;
/* do we have a pointer here? */
if ( !cur_addr )
break;
/* make sure this is a multicast address - shouldn't this
be a given if we have it here ? */
if ( !( *cur_addr->dmi_addr & 1 ) )
continue;
/* only use the low order bits */
position = ether_crc_le(6, cur_addr->dmi_addr) & 0x3f;
/* do some messy swapping to put the bit in the right spot */
multicast_table[invert3[position&7]] |=
(1<<invert3[(position>>3)&7]);
}
/* now, the table can be loaded into the chipset */
SMC_SELECT_BANK( 3 );
for ( i = 0; i < 8 ; i++ ) {
outb( multicast_table[i], ioaddr + MULTICAST1 + i );
}
}
/*
. Function: smc_wait_to_send_packet( struct sk_buff * skb, struct net_device * )
. Purpose:
. Attempt to allocate memory for a packet, if chip-memory is not
. available, then tell the card to generate an interrupt when it
. is available.
.
. Algorithm:
.
. o if the saved_skb is not currently null, then drop this packet
. on the floor. This should never happen, because of TBUSY.
. o if the saved_skb is null, then replace it with the current packet,
. o See if I can sending it now.
. o (NO): Enable interrupts and let the interrupt handler deal with it.
. o (YES):Send it now.
*/
static int smc_wait_to_send_packet( struct sk_buff * skb, struct net_device * dev )
{
struct smc_local *lp = netdev_priv(dev);
unsigned int ioaddr = dev->base_addr;
word length;
unsigned short numPages;
word time_out;
netif_stop_queue(dev);
/* Well, I want to send the packet.. but I don't know
if I can send it right now... */
if ( lp->saved_skb) {
/* THIS SHOULD NEVER HAPPEN. */
lp->stats.tx_aborted_errors++;
printk(CARDNAME": Bad Craziness - sent packet while busy.\n" );
return 1;
}
lp->saved_skb = skb;
length = skb->len;
if (length < ETH_ZLEN) {
if (skb_padto(skb, ETH_ZLEN)) {
netif_wake_queue(dev);
return 0;
}
length = ETH_ZLEN;
}
/*
** The MMU wants the number of pages to be the number of 256 bytes
** 'pages', minus 1 ( since a packet can't ever have 0 pages :) )
**
** Pkt size for allocating is data length +6 (for additional status words,
** length and ctl!) If odd size last byte is included in this header.
*/
numPages = ((length & 0xfffe) + 6) / 256;
if (numPages > 7 ) {
printk(CARDNAME": Far too big packet error. \n");
/* freeing the packet is a good thing here... but should
. any packets of this size get down here? */
dev_kfree_skb (skb);
lp->saved_skb = NULL;
/* this IS an error, but, i don't want the skb saved */
netif_wake_queue(dev);
return 0;
}
/* either way, a packet is waiting now */
lp->packets_waiting++;
/* now, try to allocate the memory */
SMC_SELECT_BANK( 2 );
outw( MC_ALLOC | numPages, ioaddr + MMU_CMD );
/*
. Performance Hack
.
. wait a short amount of time.. if I can send a packet now, I send
. it now. Otherwise, I enable an interrupt and wait for one to be
. available.
.
. I could have handled this a slightly different way, by checking to
. see if any memory was available in the FREE MEMORY register. However,
. either way, I need to generate an allocation, and the allocation works
. no matter what, so I saw no point in checking free memory.
*/
time_out = MEMORY_WAIT_TIME;
do {
word status;
status = inb( ioaddr + INTERRUPT );
if ( status & IM_ALLOC_INT ) {
/* acknowledge the interrupt */
outb( IM_ALLOC_INT, ioaddr + INTERRUPT );
break;
}
} while ( -- time_out );
if ( !time_out ) {
/* oh well, wait until the chip finds memory later */
SMC_ENABLE_INT( IM_ALLOC_INT );
PRINTK2((CARDNAME": memory allocation deferred. \n"));
/* it's deferred, but I'll handle it later */
return 0;
}
/* or YES! I can send the packet now.. */
smc_hardware_send_packet(dev);
netif_wake_queue(dev);
return 0;
}
/*
. Function: smc_hardware_send_packet(struct net_device * )
. Purpose:
. This sends the actual packet to the SMC9xxx chip.
.
. Algorithm:
. First, see if a saved_skb is available.
. ( this should NOT be called if there is no 'saved_skb'
. Now, find the packet number that the chip allocated
. Point the data pointers at it in memory
. Set the length word in the chip's memory
. Dump the packet to chip memory
. Check if a last byte is needed ( odd length packet )
. if so, set the control flag right
. Tell the card to send it
. Enable the transmit interrupt, so I know if it failed
. Free the kernel data if I actually sent it.
*/
static void smc_hardware_send_packet( struct net_device * dev )
{
struct smc_local *lp = netdev_priv(dev);
byte packet_no;
struct sk_buff * skb = lp->saved_skb;
word length;
unsigned int ioaddr;
byte * buf;
ioaddr = dev->base_addr;
if ( !skb ) {
PRINTK((CARDNAME": In XMIT with no packet to send \n"));
return;
}
length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
buf = skb->data;
/* If I get here, I _know_ there is a packet slot waiting for me */
packet_no = inb( ioaddr + PNR_ARR + 1 );
if ( packet_no & 0x80 ) {
/* or isn't there? BAD CHIP! */
printk(KERN_DEBUG CARDNAME": Memory allocation failed. \n");
dev_kfree_skb_any(skb);
lp->saved_skb = NULL;
netif_wake_queue(dev);
return;
}
/* we have a packet address, so tell the card to use it */
outb( packet_no, ioaddr + PNR_ARR );
/* point to the beginning of the packet */
outw( PTR_AUTOINC , ioaddr + POINTER );
PRINTK3((CARDNAME": Trying to xmit packet of length %x\n", length ));
#if SMC_DEBUG > 2
print_packet( buf, length );
#endif
/* send the packet length ( +6 for status, length and ctl byte )
and the status word ( set to zeros ) */
#ifdef USE_32_BIT
outl( (length +6 ) << 16 , ioaddr + DATA_1 );
#else
outw( 0, ioaddr + DATA_1 );
/* send the packet length ( +6 for status words, length, and ctl*/
outb( (length+6) & 0xFF,ioaddr + DATA_1 );
outb( (length+6) >> 8 , ioaddr + DATA_1 );
#endif
/* send the actual data
. I _think_ it's faster to send the longs first, and then
. mop up by sending the last word. It depends heavily
. on alignment, at least on the 486. Maybe it would be
. a good idea to check which is optimal? But that could take
. almost as much time as is saved?
*/
#ifdef USE_32_BIT
if ( length & 0x2 ) {
outsl(ioaddr + DATA_1, buf, length >> 2 );
#if !defined(__H8300H__) && !defined(__H8300S__)
outw( *((word *)(buf + (length & 0xFFFFFFFC))),ioaddr +DATA_1);
#else
ctrl_outw( *((word *)(buf + (length & 0xFFFFFFFC))),ioaddr +DATA_1);
#endif
}
else
outsl(ioaddr + DATA_1, buf, length >> 2 );
#else
outsw(ioaddr + DATA_1 , buf, (length ) >> 1);
#endif
/* Send the last byte, if there is one. */
if ( (length & 1) == 0 ) {
outw( 0, ioaddr + DATA_1 );
} else {
outb( buf[length -1 ], ioaddr + DATA_1 );
outb( 0x20, ioaddr + DATA_1);
}
/* enable the interrupts */
SMC_ENABLE_INT( (IM_TX_INT | IM_TX_EMPTY_INT) );
/* and let the chipset deal with it */
outw( MC_ENQUEUE , ioaddr + MMU_CMD );
PRINTK2((CARDNAME": Sent packet of length %d \n",length));
lp->saved_skb = NULL;
dev_kfree_skb_any (skb);
dev->trans_start = jiffies;
/* we can send another packet */
netif_wake_queue(dev);
return;
}
/*-------------------------------------------------------------------------
|
| smc_init(int unit)
| Input parameters:
| dev->base_addr == 0, try to find all possible locations
| dev->base_addr == 1, return failure code
| dev->base_addr == 2, always allocate space, and return success
| dev->base_addr == <anything else> this is the address to check
|
| Output:
| pointer to net_device or ERR_PTR(error)
|
---------------------------------------------------------------------------
*/
static int io;
static int irq;
static int ifport;
struct net_device * __init smc_init(int unit)
{
struct net_device *dev = alloc_etherdev(sizeof(struct smc_local));
struct devlist *smcdev = smc_devlist;
int err = 0;
if (!dev)
return ERR_PTR(-ENODEV);
if (unit >= 0) {
sprintf(dev->name, "eth%d", unit);
netdev_boot_setup_check(dev);
io = dev->base_addr;
irq = dev->irq;
}
SET_MODULE_OWNER(dev);
if (io > 0x1ff) { /* Check a single specified location. */
err = smc_probe(dev, io);
} else if (io != 0) { /* Don't probe at all. */
err = -ENXIO;
} else {
for (;smcdev->port; smcdev++) {
if (smc_probe(dev, smcdev->port) == 0)
break;
}
if (!smcdev->port)
err = -ENODEV;
}
if (err)
goto out;
err = register_netdev(dev);
if (err)
goto out1;
return dev;
out1:
free_irq(dev->irq, dev);
release_region(dev->base_addr, SMC_IO_EXTENT);
out:
free_netdev(dev);
return ERR_PTR(err);
}
/*----------------------------------------------------------------------
. smc_findirq
.
. This routine has a simple purpose -- make the SMC chip generate an
. interrupt, so an auto-detect routine can detect it, and find the IRQ,
------------------------------------------------------------------------
*/
int __init smc_findirq( int ioaddr )
{
#ifndef NO_AUTOPROBE
int timeout = 20;
unsigned long cookie;
cookie = probe_irq_on();
/*
* What I try to do here is trigger an ALLOC_INT. This is done
* by allocating a small chunk of memory, which will give an interrupt
* when done.
*/
SMC_SELECT_BANK(2);
/* enable ALLOCation interrupts ONLY */
outb( IM_ALLOC_INT, ioaddr + INT_MASK );
/*
. Allocate 512 bytes of memory. Note that the chip was just
. reset so all the memory is available
*/
outw( MC_ALLOC | 1, ioaddr + MMU_CMD );
/*
. Wait until positive that the interrupt has been generated
*/
while ( timeout ) {
byte int_status;
int_status = inb( ioaddr + INTERRUPT );
if ( int_status & IM_ALLOC_INT )
break; /* got the interrupt */
timeout--;
}
/* there is really nothing that I can do here if timeout fails,
as probe_irq_off will return a 0 anyway, which is what I
want in this case. Plus, the clean up is needed in both
cases. */
/* DELAY HERE!
On a fast machine, the status might change before the interrupt
is given to the processor. This means that the interrupt was
never detected, and probe_irq_off fails to report anything.
This should fix probe_irq_* problems.
*/
SMC_DELAY();
SMC_DELAY();
/* and disable all interrupts again */
outb( 0, ioaddr + INT_MASK );
/* and return what I found */
return probe_irq_off(cookie);
#else /* NO_AUTOPROBE */
struct devlist *smcdev;
for (smcdev = smc_devlist; smcdev->port; smcdev++) {
if (smcdev->port == ioaddr)
return smcdev->irq;
}
return 0;
#endif
}
/*----------------------------------------------------------------------
. Function: smc_probe( int ioaddr )
.
. Purpose:
. Tests to see if a given ioaddr points to an SMC9xxx chip.
. Returns a 0 on success
.
. Algorithm:
. (1) see if the high byte of BANK_SELECT is 0x33
. (2) compare the ioaddr with the base register's address
. (3) see if I recognize the chip ID in the appropriate register
.
.---------------------------------------------------------------------
*/
/*---------------------------------------------------------------
. Here I do typical initialization tasks.
.
. o Initialize the structure if needed
. o print out my vanity message if not done so already
. o print out what type of hardware is detected
. o print out the ethernet address
. o find the IRQ
. o set up my private data
. o configure the dev structure with my subroutines
. o actually GRAB the irq.
. o GRAB the region
.-----------------------------------------------------------------
*/
static int __init smc_probe(struct net_device *dev, int ioaddr)
{
int i, memory, retval;
static unsigned version_printed;
unsigned int bank;
const char *version_string;
const char *if_string;
/* registers */
word revision_register;
word base_address_register;
word configuration_register;
word memory_info_register;
word memory_cfg_register;
/* Grab the region so that no one else tries to probe our ioports. */
if (!request_region(ioaddr, SMC_IO_EXTENT, DRV_NAME))
return -EBUSY;
dev->irq = irq;
dev->if_port = ifport;
/* First, see if the high byte is 0x33 */
bank = inw( ioaddr + BANK_SELECT );
if ( (bank & 0xFF00) != 0x3300 ) {
retval = -ENODEV;
goto err_out;
}
/* The above MIGHT indicate a device, but I need to write to further
test this. */
outw( 0x0, ioaddr + BANK_SELECT );
bank = inw( ioaddr + BANK_SELECT );
if ( (bank & 0xFF00 ) != 0x3300 ) {
retval = -ENODEV;
goto err_out;
}
#if !defined(CONFIG_H8S_EDOSK2674)
/* well, we've already written once, so hopefully another time won't
hurt. This time, I need to switch the bank register to bank 1,
so I can access the base address register */
SMC_SELECT_BANK(1);
base_address_register = inw( ioaddr + BASE );
if ( ioaddr != ( base_address_register >> 3 & 0x3E0 ) ) {
printk(CARDNAME ": IOADDR %x doesn't match configuration (%x)."
"Probably not a SMC chip\n",
ioaddr, base_address_register >> 3 & 0x3E0 );
/* well, the base address register didn't match. Must not have
been a SMC chip after all. */
retval = -ENODEV;
goto err_out;
}
#else
(void)base_address_register; /* Warning suppression */
#endif
/* check if the revision register is something that I recognize.
These might need to be added to later, as future revisions
could be added. */
SMC_SELECT_BANK(3);
revision_register = inw( ioaddr + REVISION );
if ( !chip_ids[ ( revision_register >> 4 ) & 0xF ] ) {
/* I don't recognize this chip, so... */
printk(CARDNAME ": IO %x: Unrecognized revision register:"
" %x, Contact author. \n", ioaddr, revision_register );
retval = -ENODEV;
goto err_out;
}
/* at this point I'll assume that the chip is an SMC9xxx.
It might be prudent to check a listing of MAC addresses
against the hardware address, or do some other tests. */
if (version_printed++ == 0)
printk("%s", version);
/* fill in some of the fields */
dev->base_addr = ioaddr;
/*
. Get the MAC address ( bank 1, regs 4 - 9 )
*/
SMC_SELECT_BANK( 1 );
for ( i = 0; i < 6; i += 2 ) {
word address;
address = inw( ioaddr + ADDR0 + i );
dev->dev_addr[ i + 1] = address >> 8;
dev->dev_addr[ i ] = address & 0xFF;
}
/* get the memory information */
SMC_SELECT_BANK( 0 );
memory_info_register = inw( ioaddr + MIR );
memory_cfg_register = inw( ioaddr + MCR );
memory = ( memory_cfg_register >> 9 ) & 0x7; /* multiplier */
memory *= 256 * ( memory_info_register & 0xFF );
/*
Now, I want to find out more about the chip. This is sort of
redundant, but it's cleaner to have it in both, rather than having
one VERY long probe procedure.
*/
SMC_SELECT_BANK(3);
revision_register = inw( ioaddr + REVISION );
version_string = chip_ids[ ( revision_register >> 4 ) & 0xF ];
if ( !version_string ) {
/* I shouldn't get here because this call was done before.... */
retval = -ENODEV;
goto err_out;
}
/* is it using AUI or 10BaseT ? */
if ( dev->if_port == 0 ) {
SMC_SELECT_BANK(1);
configuration_register = inw( ioaddr + CONFIG );
if ( configuration_register & CFG_AUI_SELECT )
dev->if_port = 2;
else
dev->if_port = 1;
}
if_string = interfaces[ dev->if_port - 1 ];
/* now, reset the chip, and put it into a known state */
smc_reset( ioaddr );
/*
. If dev->irq is 0, then the device has to be banged on to see
. what the IRQ is.
.
. This banging doesn't always detect the IRQ, for unknown reasons.
. a workaround is to reset the chip and try again.
.
. Interestingly, the DOS packet driver *SETS* the IRQ on the card to
. be what is requested on the command line. I don't do that, mostly
. because the card that I have uses a non-standard method of accessing
. the IRQs, and because this _should_ work in most configurations.
.
. Specifying an IRQ is done with the assumption that the user knows
. what (s)he is doing. No checking is done!!!!
.
*/
if ( dev->irq < 2 ) {
int trials;
trials = 3;
while ( trials-- ) {
dev->irq = smc_findirq( ioaddr );
if ( dev->irq )
break;
/* kick the card and try again */
smc_reset( ioaddr );
}
}
if (dev->irq == 0 ) {
printk(CARDNAME": Couldn't autodetect your IRQ. Use irq=xx.\n");
retval = -ENODEV;
goto err_out;
}
/* now, print out the card info, in a short format.. */
printk("%s: %s(r:%d) at %#3x IRQ:%d INTF:%s MEM:%db ", dev->name,
version_string, revision_register & 0xF, ioaddr, dev->irq,
if_string, memory );
/*
. Print the Ethernet address
*/
printk("ADDR: ");
for (i = 0; i < 5; i++)
printk("%2.2x:", dev->dev_addr[i] );
printk("%2.2x \n", dev->dev_addr[5] );
/* set the private data to zero by default */
memset(dev->priv, 0, sizeof(struct smc_local));
/* Grab the IRQ */
retval = request_irq(dev->irq, &smc_interrupt, 0, DRV_NAME, dev);
if (retval) {
printk("%s: unable to get IRQ %d (irqval=%d).\n", DRV_NAME,
dev->irq, retval);
goto err_out;
}
dev->open = smc_open;
dev->stop = smc_close;
dev->hard_start_xmit = smc_wait_to_send_packet;
dev->tx_timeout = smc_timeout;
dev->watchdog_timeo = HZ/20;
dev->get_stats = smc_query_statistics;
dev->set_multicast_list = smc_set_multicast_list;
return 0;
err_out:
release_region(ioaddr, SMC_IO_EXTENT);
return retval;
}
#if SMC_DEBUG > 2
static void print_packet( byte * buf, int length )
{
#if 0
int i;
int remainder;
int lines;
printk("Packet of length %d \n", length );
lines = length / 16;
remainder = length % 16;
for ( i = 0; i < lines ; i ++ ) {
int cur;
for ( cur = 0; cur < 8; cur ++ ) {
byte a, b;
a = *(buf ++ );
b = *(buf ++ );
printk("%02x%02x ", a, b );
}
printk("\n");
}
for ( i = 0; i < remainder/2 ; i++ ) {
byte a, b;
a = *(buf ++ );
b = *(buf ++ );
printk("%02x%02x ", a, b );
}
printk("\n");
#endif
}
#endif
/*
* Open and Initialize the board
*
* Set up everything, reset the card, etc ..
*
*/
static int smc_open(struct net_device *dev)
{
int ioaddr = dev->base_addr;
int i; /* used to set hw ethernet address */
/* clear out all the junk that was put here before... */
memset(dev->priv, 0, sizeof(struct smc_local));
/* reset the hardware */
smc_reset( ioaddr );
smc_enable( ioaddr );
/* Select which interface to use */
SMC_SELECT_BANK( 1 );
if ( dev->if_port == 1 ) {
outw( inw( ioaddr + CONFIG ) & ~CFG_AUI_SELECT,
ioaddr + CONFIG );
}
else if ( dev->if_port == 2 ) {
outw( inw( ioaddr + CONFIG ) | CFG_AUI_SELECT,
ioaddr + CONFIG );
}
/*
According to Becker, I have to set the hardware address
at this point, because the (l)user can set it with an
ioctl. Easily done...
*/
SMC_SELECT_BANK( 1 );
for ( i = 0; i < 6; i += 2 ) {
word address;
address = dev->dev_addr[ i + 1 ] << 8 ;
address |= dev->dev_addr[ i ];
outw( address, ioaddr + ADDR0 + i );
}
netif_start_queue(dev);
return 0;
}
/*--------------------------------------------------------
. Called by the kernel to send a packet out into the void
. of the net. This routine is largely based on
. skeleton.c, from Becker.
.--------------------------------------------------------
*/
static void smc_timeout(struct net_device *dev)
{
/* If we get here, some higher level has decided we are broken.
There should really be a "kick me" function call instead. */
printk(KERN_WARNING CARDNAME": transmit timed out, %s?\n",
tx_done(dev) ? "IRQ conflict" :
"network cable problem");
/* "kick" the adaptor */
smc_reset( dev->base_addr );
smc_enable( dev->base_addr );
dev->trans_start = jiffies;
/* clear anything saved */
((struct smc_local *)dev->priv)->saved_skb = NULL;
netif_wake_queue(dev);
}
/*-------------------------------------------------------------
.
. smc_rcv - receive a packet from the card
.
. There is ( at least ) a packet waiting to be read from
. chip-memory.
.
. o Read the status
. o If an error, record it
. o otherwise, read in the packet
--------------------------------------------------------------
*/
static void smc_rcv(struct net_device *dev)
{
struct smc_local *lp = netdev_priv(dev);
int ioaddr = dev->base_addr;
int packet_number;
word status;
word packet_length;
/* assume bank 2 */
packet_number = inw( ioaddr + FIFO_PORTS );
if ( packet_number & FP_RXEMPTY ) {
/* we got called , but nothing was on the FIFO */
PRINTK((CARDNAME ": WARNING: smc_rcv with nothing on FIFO. \n"));
/* don't need to restore anything */
return;
}
/* start reading from the start of the packet */
outw( PTR_READ | PTR_RCV | PTR_AUTOINC, ioaddr + POINTER );
/* First two words are status and packet_length */
status = inw( ioaddr + DATA_1 );
packet_length = inw( ioaddr + DATA_1 );
packet_length &= 0x07ff; /* mask off top bits */
PRINTK2(("RCV: STATUS %4x LENGTH %4x\n", status, packet_length ));
/*
. the packet length contains 3 extra words :
. status, length, and an extra word with an odd byte .
*/
packet_length -= 6;
if ( !(status & RS_ERRORS ) ){
/* do stuff to make a new packet */
struct sk_buff * skb;
byte * data;
/* read one extra byte */
if ( status & RS_ODDFRAME )
packet_length++;
/* set multicast stats */
if ( status & RS_MULTICAST )
lp->stats.multicast++;
skb = dev_alloc_skb( packet_length + 5);
if ( skb == NULL ) {
printk(KERN_NOTICE CARDNAME ": Low memory, packet dropped.\n");
lp->stats.rx_dropped++;
goto done;
}
/*
! This should work without alignment, but it could be
! in the worse case
*/
skb_reserve( skb, 2 ); /* 16 bit alignment */
skb->dev = dev;
data = skb_put( skb, packet_length);
#ifdef USE_32_BIT
/* QUESTION: Like in the TX routine, do I want
to send the DWORDs or the bytes first, or some
mixture. A mixture might improve already slow PIO
performance */
PRINTK3((" Reading %d dwords (and %d bytes) \n",
packet_length >> 2, packet_length & 3 ));
insl(ioaddr + DATA_1 , data, packet_length >> 2 );
/* read the left over bytes */
insb( ioaddr + DATA_1, data + (packet_length & 0xFFFFFC),
packet_length & 0x3 );
#else
PRINTK3((" Reading %d words and %d byte(s) \n",
(packet_length >> 1 ), packet_length & 1 ));
insw(ioaddr + DATA_1 , data, packet_length >> 1);
if ( packet_length & 1 ) {
data += packet_length & ~1;
*(data++) = inb( ioaddr + DATA_1 );
}
#endif
#if SMC_DEBUG > 2
print_packet( data, packet_length );
#endif
skb->protocol = eth_type_trans(skb, dev );
netif_rx(skb);
dev->last_rx = jiffies;
lp->stats.rx_packets++;
lp->stats.rx_bytes += packet_length;
} else {
/* error ... */
lp->stats.rx_errors++;
if ( status & RS_ALGNERR ) lp->stats.rx_frame_errors++;
if ( status & (RS_TOOSHORT | RS_TOOLONG ) )
lp->stats.rx_length_errors++;
if ( status & RS_BADCRC) lp->stats.rx_crc_errors++;
}
done:
/* error or good, tell the card to get rid of this packet */
outw( MC_RELEASE, ioaddr + MMU_CMD );
}
/*************************************************************************
. smc_tx
.
. Purpose: Handle a transmit error message. This will only be called
. when an error, because of the AUTO_RELEASE mode.
.
. Algorithm:
. Save pointer and packet no
. Get the packet no from the top of the queue
. check if it's valid ( if not, is this an error??? )
. read the status word
. record the error
. ( resend? Not really, since we don't want old packets around )
. Restore saved values
************************************************************************/
static void smc_tx( struct net_device * dev )
{
int ioaddr = dev->base_addr;
struct smc_local *lp = netdev_priv(dev);
byte saved_packet;
byte packet_no;
word tx_status;
/* assume bank 2 */
saved_packet = inb( ioaddr + PNR_ARR );
packet_no = inw( ioaddr + FIFO_PORTS );
packet_no &= 0x7F;
/* select this as the packet to read from */
outb( packet_no, ioaddr + PNR_ARR );
/* read the first word from this packet */
outw( PTR_AUTOINC | PTR_READ, ioaddr + POINTER );
tx_status = inw( ioaddr + DATA_1 );
PRINTK3((CARDNAME": TX DONE STATUS: %4x \n", tx_status ));
lp->stats.tx_errors++;
if ( tx_status & TS_LOSTCAR ) lp->stats.tx_carrier_errors++;
if ( tx_status & TS_LATCOL ) {
printk(KERN_DEBUG CARDNAME
": Late collision occurred on last xmit.\n");
lp->stats.tx_window_errors++;
}
#if 0
if ( tx_status & TS_16COL ) { ... }
#endif
if ( tx_status & TS_SUCCESS ) {
printk(CARDNAME": Successful packet caused interrupt \n");
}
/* re-enable transmit */
SMC_SELECT_BANK( 0 );
outw( inw( ioaddr + TCR ) | TCR_ENABLE, ioaddr + TCR );
/* kill the packet */
SMC_SELECT_BANK( 2 );
outw( MC_FREEPKT, ioaddr + MMU_CMD );
/* one less packet waiting for me */
lp->packets_waiting--;
outb( saved_packet, ioaddr + PNR_ARR );
return;
}
/*--------------------------------------------------------------------
.
. This is the main routine of the driver, to handle the device when
. it needs some attention.
.
. So:
. first, save state of the chipset
. branch off into routines to handle each case, and acknowledge
. each to the interrupt register
. and finally restore state.
.
---------------------------------------------------------------------*/
static irqreturn_t smc_interrupt(int irq, void * dev_id)
{
struct net_device *dev = dev_id;
int ioaddr = dev->base_addr;
struct smc_local *lp = netdev_priv(dev);
byte status;
word card_stats;
byte mask;
int timeout;
/* state registers */
word saved_bank;
word saved_pointer;
int handled = 0;
PRINTK3((CARDNAME": SMC interrupt started \n"));
saved_bank = inw( ioaddr + BANK_SELECT );
SMC_SELECT_BANK(2);
saved_pointer = inw( ioaddr + POINTER );
mask = inb( ioaddr + INT_MASK );
/* clear all interrupts */
outb( 0, ioaddr + INT_MASK );
/* set a timeout value, so I don't stay here forever */
timeout = 4;
PRINTK2((KERN_WARNING CARDNAME ": MASK IS %x \n", mask ));
do {
/* read the status flag, and mask it */
status = inb( ioaddr + INTERRUPT ) & mask;
if (!status )
break;
handled = 1;
PRINTK3((KERN_WARNING CARDNAME
": Handling interrupt status %x \n", status ));
if (status & IM_RCV_INT) {
/* Got a packet(s). */
PRINTK2((KERN_WARNING CARDNAME
": Receive Interrupt\n"));
smc_rcv(dev);
} else if (status & IM_TX_INT ) {
PRINTK2((KERN_WARNING CARDNAME
": TX ERROR handled\n"));
smc_tx(dev);
outb(IM_TX_INT, ioaddr + INTERRUPT );
} else if (status & IM_TX_EMPTY_INT ) {
/* update stats */
SMC_SELECT_BANK( 0 );
card_stats = inw( ioaddr + COUNTER );
/* single collisions */
lp->stats.collisions += card_stats & 0xF;
card_stats >>= 4;
/* multiple collisions */
lp->stats.collisions += card_stats & 0xF;
/* these are for when linux supports these statistics */
SMC_SELECT_BANK( 2 );
PRINTK2((KERN_WARNING CARDNAME
": TX_BUFFER_EMPTY handled\n"));
outb( IM_TX_EMPTY_INT, ioaddr + INTERRUPT );
mask &= ~IM_TX_EMPTY_INT;
lp->stats.tx_packets += lp->packets_waiting;
lp->packets_waiting = 0;
} else if (status & IM_ALLOC_INT ) {
PRINTK2((KERN_DEBUG CARDNAME
": Allocation interrupt \n"));
/* clear this interrupt so it doesn't happen again */
mask &= ~IM_ALLOC_INT;
smc_hardware_send_packet( dev );
/* enable xmit interrupts based on this */
mask |= ( IM_TX_EMPTY_INT | IM_TX_INT );
/* and let the card send more packets to me */
netif_wake_queue(dev);
PRINTK2((CARDNAME": Handoff done successfully.\n"));
} else if (status & IM_RX_OVRN_INT ) {
lp->stats.rx_errors++;
lp->stats.rx_fifo_errors++;
outb( IM_RX_OVRN_INT, ioaddr + INTERRUPT );
} else if (status & IM_EPH_INT ) {
PRINTK((CARDNAME ": UNSUPPORTED: EPH INTERRUPT \n"));
} else if (status & IM_ERCV_INT ) {
PRINTK((CARDNAME ": UNSUPPORTED: ERCV INTERRUPT \n"));
outb( IM_ERCV_INT, ioaddr + INTERRUPT );
}
} while ( timeout -- );
/* restore state register */
SMC_SELECT_BANK( 2 );
outb( mask, ioaddr + INT_MASK );
PRINTK3(( KERN_WARNING CARDNAME ": MASK is now %x \n", mask ));
outw( saved_pointer, ioaddr + POINTER );
SMC_SELECT_BANK( saved_bank );
PRINTK3((CARDNAME ": Interrupt done\n"));
return IRQ_RETVAL(handled);
}
/*----------------------------------------------------
. smc_close
.
. this makes the board clean up everything that it can
. and not talk to the outside world. Caused by
. an 'ifconfig ethX down'
.
-----------------------------------------------------*/
static int smc_close(struct net_device *dev)
{
netif_stop_queue(dev);
/* clear everything */
smc_shutdown( dev->base_addr );
/* Update the statistics here. */
return 0;
}
/*------------------------------------------------------------
. Get the current statistics.
. This may be called with the card open or closed.
.-------------------------------------------------------------*/
static struct net_device_stats* smc_query_statistics(struct net_device *dev) {
struct smc_local *lp = netdev_priv(dev);
return &lp->stats;
}
/*-----------------------------------------------------------
. smc_set_multicast_list
.
. This routine will, depending on the values passed to it,
. either make it accept multicast packets, go into
. promiscuous mode ( for TCPDUMP and cousins ) or accept
. a select set of multicast packets
*/
static void smc_set_multicast_list(struct net_device *dev)
{
short ioaddr = dev->base_addr;
SMC_SELECT_BANK(0);
if ( dev->flags & IFF_PROMISC )
outw( inw(ioaddr + RCR ) | RCR_PROMISC, ioaddr + RCR );
/* BUG? I never disable promiscuous mode if multicasting was turned on.
Now, I turn off promiscuous mode, but I don't do anything to multicasting
when promiscuous mode is turned on.
*/
/* Here, I am setting this to accept all multicast packets.
I don't need to zero the multicast table, because the flag is
checked before the table is
*/
else if (dev->flags & IFF_ALLMULTI)
outw( inw(ioaddr + RCR ) | RCR_ALMUL, ioaddr + RCR );
/* We just get all multicast packets even if we only want them
. from one source. This will be changed at some future
. point. */
else if (dev->mc_count ) {
/* support hardware multicasting */
/* be sure I get rid of flags I might have set */
outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL),
ioaddr + RCR );
/* NOTE: this has to set the bank, so make sure it is the
last thing called. The bank is set to zero at the top */
smc_setmulticast( ioaddr, dev->mc_count, dev->mc_list );
}
else {
outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL),
ioaddr + RCR );
/*
since I'm disabling all multicast entirely, I need to
clear the multicast list
*/
SMC_SELECT_BANK( 3 );
outw( 0, ioaddr + MULTICAST1 );
outw( 0, ioaddr + MULTICAST2 );
outw( 0, ioaddr + MULTICAST3 );
outw( 0, ioaddr + MULTICAST4 );
}
}
#ifdef MODULE
static struct net_device *devSMC9194;
MODULE_LICENSE("GPL");
module_param(io, int, 0);
module_param(irq, int, 0);
module_param(ifport, int, 0);
MODULE_PARM_DESC(io, "SMC 99194 I/O base address");
MODULE_PARM_DESC(irq, "SMC 99194 IRQ number");
MODULE_PARM_DESC(ifport, "SMC 99194 interface port (0-default, 1-TP, 2-AUI)");
int __init init_module(void)
{
if (io == 0)
printk(KERN_WARNING
CARDNAME": You shouldn't use auto-probing with insmod!\n" );
/* copy the parameters from insmod into the device structure */
devSMC9194 = smc_init(-1);
if (IS_ERR(devSMC9194))
return PTR_ERR(devSMC9194);
return 0;
}
void cleanup_module(void)
{
unregister_netdev(devSMC9194);
free_irq(devSMC9194->irq, devSMC9194);
release_region(devSMC9194->base_addr, SMC_IO_EXTENT);
free_netdev(devSMC9194);
}
#endif /* MODULE */
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