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1595 lines
43 KiB
1595 lines
43 KiB
/*------------------------------------------------------------------------
|
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. smc9194.c
|
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. This is a driver for SMC's 9000 series of Ethernet cards.
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.
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. Copyright (C) 1996 by Erik Stahlman
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. This software may be used and distributed according to the terms
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. of the GNU General Public License, incorporated herein by reference.
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.
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. "Features" of the SMC chip:
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. 4608 byte packet memory. ( for the 91C92. Others have more )
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. EEPROM for configuration
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. AUI/TP selection ( mine has 10Base2/10BaseT select )
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.
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. Arguments:
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. io = for the base address
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. irq = for the IRQ
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. ifport = 0 for autodetect, 1 for TP, 2 for AUI ( or 10base2 )
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.
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. author:
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. Erik Stahlman ( erik@vt.edu )
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. contributors:
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. Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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.
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. Hardware multicast code from Peter Cammaert ( pc@denkart.be )
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.
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. Sources:
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. o SMC databook
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. o skeleton.c by Donald Becker ( becker@scyld.com )
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. o ( a LOT of advice from Becker as well )
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.
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. History:
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. 12/07/95 Erik Stahlman written, got receive/xmit handled
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. 01/03/96 Erik Stahlman worked out some bugs, actually usable!!! :-)
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. 01/06/96 Erik Stahlman cleaned up some, better testing, etc
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. 01/29/96 Erik Stahlman fixed autoirq, added multicast
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. 02/01/96 Erik Stahlman 1. disabled all interrupts in smc_reset
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. 2. got rid of post-decrementing bug -- UGH.
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. 02/13/96 Erik Stahlman Tried to fix autoirq failure. Added more
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. descriptive error messages.
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. 02/15/96 Erik Stahlman Fixed typo that caused detection failure
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. 02/23/96 Erik Stahlman Modified it to fit into kernel tree
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. Added support to change hardware address
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. Cleared stats on opens
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. 02/26/96 Erik Stahlman Trial support for Kernel 1.2.13
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. Kludge for automatic IRQ detection
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. 03/04/96 Erik Stahlman Fixed kernel 1.3.70 +
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. Fixed bug reported by Gardner Buchanan in
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. smc_enable, with outw instead of outb
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. 03/06/96 Erik Stahlman Added hardware multicast from Peter Cammaert
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. 04/14/00 Heiko Pruessing (SMA Regelsysteme) Fixed bug in chip memory
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. allocation
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. 08/20/00 Arnaldo Melo fix kfree(skb) in smc_hardware_send_packet
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. 12/15/00 Christian Jullien fix "Warning: kfree_skb on hard IRQ"
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. 11/08/01 Matt Domsch Use common crc32 function
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----------------------------------------------------------------------------*/
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static const char version[] =
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"smc9194.c:v0.14 12/15/00 by Erik Stahlman (erik@vt.edu)\n";
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/in.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/crc32.h>
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#include <linux/errno.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/bitops.h>
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#include <asm/io.h>
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#include "smc9194.h"
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#define DRV_NAME "smc9194"
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/*------------------------------------------------------------------------
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.
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. Configuration options, for the experienced user to change.
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.
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-------------------------------------------------------------------------*/
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/*
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. Do you want to use 32 bit xfers? This should work on all chips, as
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. the chipset is designed to accommodate them.
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*/
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#ifdef __sh__
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#undef USE_32_BIT
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#else
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#define USE_32_BIT 1
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#endif
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#if defined(__H8300H__) || defined(__H8300S__)
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#define NO_AUTOPROBE
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#undef insl
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#undef outsl
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#define insl(a,b,l) io_insl_noswap(a,b,l)
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#define outsl(a,b,l) io_outsl_noswap(a,b,l)
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#endif
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/*
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.the SMC9194 can be at any of the following port addresses. To change,
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.for a slightly different card, you can add it to the array. Keep in
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.mind that the array must end in zero.
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*/
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struct devlist {
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unsigned int port;
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unsigned int irq;
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};
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#if defined(CONFIG_H8S_EDOSK2674)
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static struct devlist smc_devlist[] __initdata = {
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{.port = 0xf80000, .irq = 16},
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{.port = 0, .irq = 0 },
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};
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#else
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static struct devlist smc_devlist[] __initdata = {
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{.port = 0x200, .irq = 0},
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{.port = 0x220, .irq = 0},
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{.port = 0x240, .irq = 0},
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{.port = 0x260, .irq = 0},
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{.port = 0x280, .irq = 0},
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{.port = 0x2A0, .irq = 0},
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{.port = 0x2C0, .irq = 0},
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{.port = 0x2E0, .irq = 0},
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{.port = 0x300, .irq = 0},
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{.port = 0x320, .irq = 0},
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{.port = 0x340, .irq = 0},
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{.port = 0x360, .irq = 0},
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{.port = 0x380, .irq = 0},
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{.port = 0x3A0, .irq = 0},
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{.port = 0x3C0, .irq = 0},
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{.port = 0x3E0, .irq = 0},
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{.port = 0, .irq = 0},
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};
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#endif
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/*
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. Wait time for memory to be free. This probably shouldn't be
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. tuned that much, as waiting for this means nothing else happens
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. in the system
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*/
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#define MEMORY_WAIT_TIME 16
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/*
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. DEBUGGING LEVELS
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.
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. 0 for normal operation
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. 1 for slightly more details
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. >2 for various levels of increasingly useless information
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. 2 for interrupt tracking, status flags
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. 3 for packet dumps, etc.
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*/
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#define SMC_DEBUG 0
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#if (SMC_DEBUG > 2 )
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#define PRINTK3(x) printk x
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#else
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#define PRINTK3(x)
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#endif
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#if SMC_DEBUG > 1
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#define PRINTK2(x) printk x
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#else
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#define PRINTK2(x)
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#endif
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#ifdef SMC_DEBUG
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#define PRINTK(x) printk x
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#else
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#define PRINTK(x)
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#endif
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|
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/*------------------------------------------------------------------------
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.
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. The internal workings of the driver. If you are changing anything
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. here with the SMC stuff, you should have the datasheet and known
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. what you are doing.
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.
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-------------------------------------------------------------------------*/
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#define CARDNAME "SMC9194"
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/* store this information for the driver.. */
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struct smc_local {
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/*
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If I have to wait until memory is available to send
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a packet, I will store the skbuff here, until I get the
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desired memory. Then, I'll send it out and free it.
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*/
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struct sk_buff * saved_skb;
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/*
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. This keeps track of how many packets that I have
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. sent out. When an TX_EMPTY interrupt comes, I know
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. that all of these have been sent.
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*/
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int packets_waiting;
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};
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|
|
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/*-----------------------------------------------------------------
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.
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. The driver can be entered at any of the following entry points.
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.
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.------------------------------------------------------------------ */
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/*
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. This is called by register_netdev(). It is responsible for
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. checking the portlist for the SMC9000 series chipset. If it finds
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. one, then it will initialize the device, find the hardware information,
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. and sets up the appropriate device parameters.
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. NOTE: Interrupts are *OFF* when this procedure is called.
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.
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. NB:This shouldn't be static since it is referred to externally.
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*/
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struct net_device *smc_init(int unit);
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/*
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. The kernel calls this function when someone wants to use the device,
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. typically 'ifconfig ethX up'.
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*/
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static int smc_open(struct net_device *dev);
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/*
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. Our watchdog timed out. Called by the networking layer
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*/
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static void smc_timeout(struct net_device *dev);
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/*
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. This is called by the kernel in response to 'ifconfig ethX down'. It
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. is responsible for cleaning up everything that the open routine
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. does, and maybe putting the card into a powerdown state.
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*/
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static int smc_close(struct net_device *dev);
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/*
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. Finally, a call to set promiscuous mode ( for TCPDUMP and related
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. programs ) and multicast modes.
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*/
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static void smc_set_multicast_list(struct net_device *dev);
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|
|
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/*---------------------------------------------------------------
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.
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. Interrupt level calls..
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.
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----------------------------------------------------------------*/
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/*
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. Handles the actual interrupt
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*/
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static irqreturn_t smc_interrupt(int irq, void *);
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/*
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. This is a separate procedure to handle the receipt of a packet, to
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. leave the interrupt code looking slightly cleaner
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*/
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static inline void smc_rcv( struct net_device *dev );
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/*
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. This handles a TX interrupt, which is only called when an error
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. relating to a packet is sent.
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*/
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static inline void smc_tx( struct net_device * dev );
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/*
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------------------------------------------------------------
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.
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. Internal routines
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.
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------------------------------------------------------------
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*/
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/*
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. Test if a given location contains a chip, trying to cause as
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. little damage as possible if it's not a SMC chip.
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*/
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static int smc_probe(struct net_device *dev, int ioaddr);
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/*
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. A rather simple routine to print out a packet for debugging purposes.
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*/
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#if SMC_DEBUG > 2
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static void print_packet( byte *, int );
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#endif
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#define tx_done(dev) 1
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/* this is called to actually send the packet to the chip */
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static void smc_hardware_send_packet( struct net_device * dev );
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/* Since I am not sure if I will have enough room in the chip's ram
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. to store the packet, I call this routine, which either sends it
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. now, or generates an interrupt when the card is ready for the
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. packet */
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static int smc_wait_to_send_packet( struct sk_buff * skb, struct net_device *dev );
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/* this does a soft reset on the device */
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static void smc_reset( int ioaddr );
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/* Enable Interrupts, Receive, and Transmit */
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static void smc_enable( int ioaddr );
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/* this puts the device in an inactive state */
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static void smc_shutdown( int ioaddr );
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/* This routine will find the IRQ of the driver if one is not
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. specified in the input to the device. */
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static int smc_findirq( int ioaddr );
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/*
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. Function: smc_reset( int ioaddr )
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. Purpose:
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. This sets the SMC91xx chip to its normal state, hopefully from whatever
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. mess that any other DOS driver has put it in.
|
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.
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|
. Maybe I should reset more registers to defaults in here? SOFTRESET should
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. do that for me.
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.
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. Method:
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. 1. send a SOFT RESET
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. 2. wait for it to finish
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. 3. enable autorelease mode
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. 4. reset the memory management unit
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. 5. clear all interrupts
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.
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*/
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static void smc_reset( int ioaddr )
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{
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/* This resets the registers mostly to defaults, but doesn't
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affect EEPROM. That seems unnecessary */
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SMC_SELECT_BANK( 0 );
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outw( RCR_SOFTRESET, ioaddr + RCR );
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|
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/* this should pause enough for the chip to be happy */
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SMC_DELAY( );
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|
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/* Set the transmit and receive configuration registers to
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default values */
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outw( RCR_CLEAR, ioaddr + RCR );
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outw( TCR_CLEAR, ioaddr + TCR );
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|
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/* set the control register to automatically
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release successfully transmitted packets, to make the best
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use out of our limited memory */
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SMC_SELECT_BANK( 1 );
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outw( inw( ioaddr + CONTROL ) | CTL_AUTO_RELEASE , ioaddr + CONTROL );
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/* Reset the MMU */
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SMC_SELECT_BANK( 2 );
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outw( MC_RESET, ioaddr + MMU_CMD );
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|
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/* Note: It doesn't seem that waiting for the MMU busy is needed here,
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but this is a place where future chipsets _COULD_ break. Be wary
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of issuing another MMU command right after this */
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|
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outb( 0, ioaddr + INT_MASK );
|
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}
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|
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/*
|
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. Function: smc_enable
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. Purpose: let the chip talk to the outside work
|
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. Method:
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. 1. Enable the transmitter
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. 2. Enable the receiver
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. 3. Enable interrupts
|
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*/
|
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static void smc_enable( int ioaddr )
|
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{
|
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SMC_SELECT_BANK( 0 );
|
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/* see the header file for options in TCR/RCR NORMAL*/
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outw( TCR_NORMAL, ioaddr + TCR );
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outw( RCR_NORMAL, ioaddr + RCR );
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|
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/* now, enable interrupts */
|
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SMC_SELECT_BANK( 2 );
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outb( SMC_INTERRUPT_MASK, ioaddr + INT_MASK );
|
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}
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|
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/*
|
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. Function: smc_shutdown
|
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. Purpose: closes down the SMC91xxx chip.
|
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. Method:
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. 1. zero the interrupt mask
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. 2. clear the enable receive flag
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. 3. clear the enable xmit flags
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.
|
|
. TODO:
|
|
. (1) maybe utilize power down mode.
|
|
. Why not yet? Because while the chip will go into power down mode,
|
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. the manual says that it will wake up in response to any I/O requests
|
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. in the register space. Empirical results do not show this working.
|
|
*/
|
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static void smc_shutdown( int ioaddr )
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{
|
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/* no more interrupts for me */
|
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SMC_SELECT_BANK( 2 );
|
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outb( 0, ioaddr + INT_MASK );
|
|
|
|
/* and tell the card to stay away from that nasty outside world */
|
|
SMC_SELECT_BANK( 0 );
|
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outb( RCR_CLEAR, ioaddr + RCR );
|
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outb( TCR_CLEAR, ioaddr + TCR );
|
|
#if 0
|
|
/* finally, shut the chip down */
|
|
SMC_SELECT_BANK( 1 );
|
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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. */
|
|
dev->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;
|
|
}
|
|
|
|
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,
|
|
------------------------------------------------------------------------
|
|
*/
|
|
static 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: %pM\n", dev->dev_addr);
|
|
|
|
/* set the private data to zero by default */
|
|
memset(netdev_priv(dev), 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->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(netdev_priv(dev), 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 *)netdev_priv(dev))->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)
|
|
{
|
|
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 )
|
|
dev->stats.multicast++;
|
|
|
|
skb = dev_alloc_skb( packet_length + 5);
|
|
|
|
if ( skb == NULL ) {
|
|
printk(KERN_NOTICE CARDNAME ": Low memory, packet dropped.\n");
|
|
dev->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 */
|
|
|
|
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->stats.rx_packets++;
|
|
dev->stats.rx_bytes += packet_length;
|
|
} else {
|
|
/* error ... */
|
|
dev->stats.rx_errors++;
|
|
|
|
if ( status & RS_ALGNERR ) dev->stats.rx_frame_errors++;
|
|
if ( status & (RS_TOOSHORT | RS_TOOLONG ) )
|
|
dev->stats.rx_length_errors++;
|
|
if ( status & RS_BADCRC) dev->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 ));
|
|
|
|
dev->stats.tx_errors++;
|
|
if ( tx_status & TS_LOSTCAR ) dev->stats.tx_carrier_errors++;
|
|
if ( tx_status & TS_LATCOL ) {
|
|
printk(KERN_DEBUG CARDNAME
|
|
": Late collision occurred on last xmit.\n");
|
|
dev->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 */
|
|
dev->stats.collisions += card_stats & 0xF;
|
|
card_stats >>= 4;
|
|
/* multiple collisions */
|
|
dev->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;
|
|
dev->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 ) {
|
|
dev->stats.rx_errors++;
|
|
dev->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;
|
|
}
|
|
|
|
/*-----------------------------------------------------------
|
|
. 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 __exit cleanup_module(void)
|
|
{
|
|
unregister_netdev(devSMC9194);
|
|
free_irq(devSMC9194->irq, devSMC9194);
|
|
release_region(devSMC9194->base_addr, SMC_IO_EXTENT);
|
|
free_netdev(devSMC9194);
|
|
}
|
|
|
|
#endif /* MODULE */
|
|
|