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1275 |
phoenix |
/*
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* de620.c $Revision: 1.1.1.1 $ BETA
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*
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*
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* Linux driver for the D-Link DE-620 Ethernet pocket adapter.
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*
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* Portions (C) Copyright 1993, 1994 by Bjorn Ekwall <bj0rn@blox.se>
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*
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* Based on adapter information gathered from DOS packetdriver
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* sources from D-Link Inc: (Special thanks to Henry Ngai of D-Link.)
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* Portions (C) Copyright D-Link SYSTEM Inc. 1991, 1992
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* Copyright, 1988, Russell Nelson, Crynwr Software
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*
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* Adapted to the sample network driver core for linux,
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* written by: Donald Becker <becker@super.org>
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* (Now at <becker@scyld.com>)
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*
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* Valuable assistance from:
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* J. Joshua Kopper <kopper@rtsg.mot.com>
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* Olav Kvittem <Olav.Kvittem@uninett.no>
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* Germano Caronni <caronni@nessie.cs.id.ethz.ch>
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* Jeremy Fitzhardinge <jeremy@suite.sw.oz.au>
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*
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*****************************************************************************/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*****************************************************************************/
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static const char version[] =
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"de620.c: $Revision: 1.1.1.1 $, Bjorn Ekwall <bj0rn@blox.se>\n";
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/***********************************************************************
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*
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* "Tuning" section.
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*
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* Compile-time options: (see below for descriptions)
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* -DDE620_IO=0x378 (lpt1)
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* -DDE620_IRQ=7 (lpt1)
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* -DDE602_DEBUG=...
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* -DSHUTDOWN_WHEN_LOST
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* -DCOUNT_LOOPS
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* -DLOWSPEED
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* -DREAD_DELAY
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* -DWRITE_DELAY
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*/
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/*
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* This driver assumes that the printer port is a "normal",
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* dumb, uni-directional port!
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* If your port is "fancy" in any way, please try to set it to "normal"
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* with your BIOS setup. I have no access to machines with bi-directional
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* ports, so I can't test such a driver :-(
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* (Yes, I _know_ it is possible to use DE620 with bidirectional ports...)
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*
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* There are some clones of DE620 out there, with different names.
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* If the current driver does not recognize a clone, try to change
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* the following #define to:
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*
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* #define DE620_CLONE 1
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*/
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#define DE620_CLONE 0
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/*
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* If the adapter has problems with high speeds, enable this #define
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* otherwise full printerport speed will be attempted.
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*
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* You can tune the READ_DELAY/WRITE_DELAY below if you enable LOWSPEED
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*
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#define LOWSPEED
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*/
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#ifndef READ_DELAY
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#define READ_DELAY 100 /* adapter internal read delay in 100ns units */
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#endif
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#ifndef WRITE_DELAY
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#define WRITE_DELAY 100 /* adapter internal write delay in 100ns units */
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#endif
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/*
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* Enable this #define if you want the adapter to do a "ifconfig down" on
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* itself when we have detected that something is possibly wrong with it.
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* The default behaviour is to retry with "adapter_init()" until success.
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* This should be used for debugging purposes only.
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*
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#define SHUTDOWN_WHEN_LOST
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*/
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/*
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* Enable debugging by "-DDE620_DEBUG=3" when compiling,
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* OR by enabling the following #define
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*
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* use 0 for production, 1 for verification, >2 for debug
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*
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#define DE620_DEBUG 3
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*/
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#ifdef LOWSPEED
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/*
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* Enable this #define if you want to see debugging output that show how long
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* we have to wait before the DE-620 is ready for the next read/write/command.
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*
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#define COUNT_LOOPS
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*/
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#endif
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/string.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <asm/io.h>
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#include <linux/in.h>
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#include <linux/ptrace.h>
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#include <asm/system.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/inet.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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/* Constant definitions for the DE-620 registers, commands and bits */
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#include "de620.h"
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typedef unsigned char byte;
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/*******************************************************
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* *
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* Definition of D-Link DE-620 Ethernet Pocket adapter *
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* See also "de620.h" *
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* *
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*******************************************************/
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#ifndef DE620_IO /* Compile-time configurable */
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#define DE620_IO 0x378
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#endif
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#ifndef DE620_IRQ /* Compile-time configurable */
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#define DE620_IRQ 7
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#endif
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#define DATA_PORT (dev->base_addr)
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#define STATUS_PORT (dev->base_addr + 1)
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#define COMMAND_PORT (dev->base_addr + 2)
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#define RUNT 60 /* Too small Ethernet packet */
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#define GIANT 1514 /* largest legal size packet, no fcs */
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#ifdef DE620_DEBUG /* Compile-time configurable */
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#define PRINTK(x) if (de620_debug >= 2) printk x
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#else
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#define DE620_DEBUG 0
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#define PRINTK(x) /**/
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#endif
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/*
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* Force media with insmod:
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* insmod de620.o bnc=1
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* or
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* insmod de620.o utp=1
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*
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* Force io and/or irq with insmod:
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* insmod de620.o io=0x378 irq=7
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*
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* Make a clone skip the Ethernet-address range check:
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* insmod de620.o clone=1
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*/
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static int bnc;
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static int utp;
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static int io = DE620_IO;
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static int irq = DE620_IRQ;
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static int clone = DE620_CLONE;
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static unsigned int de620_debug = DE620_DEBUG;
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MODULE_PARM(bnc, "i");
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MODULE_PARM(utp, "i");
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MODULE_PARM(io, "i");
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MODULE_PARM(irq, "i");
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MODULE_PARM(clone, "i");
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MODULE_PARM(de620_debug, "i");
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MODULE_PARM_DESC(bnc, "DE-620 set BNC medium (0-1)");
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MODULE_PARM_DESC(utp, "DE-620 set UTP medium (0-1)");
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MODULE_PARM_DESC(io, "DE-620 I/O base address,required");
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MODULE_PARM_DESC(irq, "DE-620 IRQ number,required");
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MODULE_PARM_DESC(clone, "Check also for non-D-Link DE-620 clones (0-1)");
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MODULE_PARM_DESC(de620_debug, "DE-620 debug level (0-2)");
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/***********************************************
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* *
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* Index to functions, as function prototypes. *
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* *
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***********************************************/
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/*
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* Routines used internally. (See also "convenience macros.. below")
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*/
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/* Put in the device structure. */
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static int de620_open(struct net_device *);
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static int de620_close(struct net_device *);
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static struct net_device_stats *get_stats(struct net_device *);
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static void de620_set_multicast_list(struct net_device *);
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static int de620_start_xmit(struct sk_buff *, struct net_device *);
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/* Dispatch from interrupts. */
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static void de620_interrupt(int, void *, struct pt_regs *);
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static int de620_rx_intr(struct net_device *);
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/* Initialization */
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static int adapter_init(struct net_device *);
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int de620_probe(struct net_device *);
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static int read_eeprom(struct net_device *);
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/*
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* D-Link driver variables:
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*/
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#define SCR_DEF NIBBLEMODE |INTON | SLEEP | AUTOTX
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#define TCR_DEF RXPB /* not used: | TXSUCINT | T16INT */
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#define DE620_RX_START_PAGE 12 /* 12 pages (=3k) reserved for tx */
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#define DEF_NIC_CMD IRQEN | ICEN | DS1
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static volatile byte NIC_Cmd;
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static volatile byte next_rx_page;
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static byte first_rx_page;
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static byte last_rx_page;
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static byte EIPRegister;
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static struct nic {
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byte NodeID[6];
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byte RAM_Size;
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byte Model;
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byte Media;
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byte SCR;
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} nic_data;
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/**********************************************************
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* *
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* Convenience macros/functions for D-Link DE-620 adapter *
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* *
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**********************************************************/
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#define de620_tx_buffs(dd) (inb(STATUS_PORT) & (TXBF0 | TXBF1))
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#define de620_flip_ds(dd) NIC_Cmd ^= DS0 | DS1; outb(NIC_Cmd, COMMAND_PORT);
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/* Check for ready-status, and return a nibble (high 4 bits) for data input */
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#ifdef COUNT_LOOPS
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static int tot_cnt;
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#endif
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static inline byte
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de620_ready(struct net_device *dev)
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{
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byte value;
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register short int cnt = 0;
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while ((((value = inb(STATUS_PORT)) & READY) == 0) && (cnt <= 1000))
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++cnt;
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#ifdef COUNT_LOOPS
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tot_cnt += cnt;
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#endif
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return value & 0xf0; /* nibble */
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}
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static inline void
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de620_send_command(struct net_device *dev, byte cmd)
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{
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de620_ready(dev);
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if (cmd == W_DUMMY)
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outb(NIC_Cmd, COMMAND_PORT);
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outb(cmd, DATA_PORT);
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outb(NIC_Cmd ^ CS0, COMMAND_PORT);
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de620_ready(dev);
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outb(NIC_Cmd, COMMAND_PORT);
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}
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static inline void
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de620_put_byte(struct net_device *dev, byte value)
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{
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/* The de620_ready() makes 7 loops, on the average, on a DX2/66 */
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de620_ready(dev);
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outb(value, DATA_PORT);
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de620_flip_ds(dev);
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}
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static inline byte
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de620_read_byte(struct net_device *dev)
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{
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byte value;
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311 |
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/* The de620_ready() makes 7 loops, on the average, on a DX2/66 */
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value = de620_ready(dev); /* High nibble */
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de620_flip_ds(dev);
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value |= de620_ready(dev) >> 4; /* Low nibble */
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return value;
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}
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static inline void
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de620_write_block(struct net_device *dev, byte *buffer, int count, int pad)
|
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{
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321 |
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#ifndef LOWSPEED
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byte uflip = NIC_Cmd ^ (DS0 | DS1);
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byte dflip = NIC_Cmd;
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#else /* LOWSPEED */
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#ifdef COUNT_LOOPS
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int bytes = count;
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#endif /* COUNT_LOOPS */
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#endif /* LOWSPEED */
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#ifdef LOWSPEED
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#ifdef COUNT_LOOPS
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tot_cnt = 0;
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#endif /* COUNT_LOOPS */
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/* No further optimization useful, the limit is in the adapter. */
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for ( ; count > 0; --count, ++buffer) {
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de620_put_byte(dev,*buffer);
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}
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for ( count = pad ; count > 0; --count, ++buffer) {
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de620_put_byte(dev, 0);
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}
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de620_send_command(dev,W_DUMMY);
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#ifdef COUNT_LOOPS
|
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/* trial debug output: loops per byte in de620_ready() */
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printk("WRITE(%d)\n", tot_cnt/((bytes?bytes:1)));
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#endif /* COUNT_LOOPS */
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#else /* not LOWSPEED */
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for ( ; count > 0; count -=2) {
|
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outb(*buffer++, DATA_PORT);
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outb(uflip, COMMAND_PORT);
|
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outb(*buffer++, DATA_PORT);
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outb(dflip, COMMAND_PORT);
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}
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de620_send_command(dev,W_DUMMY);
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#endif /* LOWSPEED */
|
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}
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357 |
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static inline void
|
358 |
|
|
de620_read_block(struct net_device *dev, byte *data, int count)
|
359 |
|
|
{
|
360 |
|
|
#ifndef LOWSPEED
|
361 |
|
|
byte value;
|
362 |
|
|
byte uflip = NIC_Cmd ^ (DS0 | DS1);
|
363 |
|
|
byte dflip = NIC_Cmd;
|
364 |
|
|
#else /* LOWSPEED */
|
365 |
|
|
#ifdef COUNT_LOOPS
|
366 |
|
|
int bytes = count;
|
367 |
|
|
|
368 |
|
|
tot_cnt = 0;
|
369 |
|
|
#endif /* COUNT_LOOPS */
|
370 |
|
|
#endif /* LOWSPEED */
|
371 |
|
|
|
372 |
|
|
#ifdef LOWSPEED
|
373 |
|
|
/* No further optimization useful, the limit is in the adapter. */
|
374 |
|
|
while (count-- > 0) {
|
375 |
|
|
*data++ = de620_read_byte(dev);
|
376 |
|
|
de620_flip_ds(dev);
|
377 |
|
|
}
|
378 |
|
|
#ifdef COUNT_LOOPS
|
379 |
|
|
/* trial debug output: loops per byte in de620_ready() */
|
380 |
|
|
printk("READ(%d)\n", tot_cnt/(2*(bytes?bytes:1)));
|
381 |
|
|
#endif /* COUNT_LOOPS */
|
382 |
|
|
#else /* not LOWSPEED */
|
383 |
|
|
while (count-- > 0) {
|
384 |
|
|
value = inb(STATUS_PORT) & 0xf0; /* High nibble */
|
385 |
|
|
outb(uflip, COMMAND_PORT);
|
386 |
|
|
*data++ = value | inb(STATUS_PORT) >> 4; /* Low nibble */
|
387 |
|
|
outb(dflip , COMMAND_PORT);
|
388 |
|
|
}
|
389 |
|
|
#endif /* LOWSPEED */
|
390 |
|
|
}
|
391 |
|
|
|
392 |
|
|
static inline void
|
393 |
|
|
de620_set_delay(struct net_device *dev)
|
394 |
|
|
{
|
395 |
|
|
de620_ready(dev);
|
396 |
|
|
outb(W_DFR, DATA_PORT);
|
397 |
|
|
outb(NIC_Cmd ^ CS0, COMMAND_PORT);
|
398 |
|
|
|
399 |
|
|
de620_ready(dev);
|
400 |
|
|
#ifdef LOWSPEED
|
401 |
|
|
outb(WRITE_DELAY, DATA_PORT);
|
402 |
|
|
#else
|
403 |
|
|
outb(0, DATA_PORT);
|
404 |
|
|
#endif
|
405 |
|
|
de620_flip_ds(dev);
|
406 |
|
|
|
407 |
|
|
de620_ready(dev);
|
408 |
|
|
#ifdef LOWSPEED
|
409 |
|
|
outb(READ_DELAY, DATA_PORT);
|
410 |
|
|
#else
|
411 |
|
|
outb(0, DATA_PORT);
|
412 |
|
|
#endif
|
413 |
|
|
de620_flip_ds(dev);
|
414 |
|
|
}
|
415 |
|
|
|
416 |
|
|
static inline void
|
417 |
|
|
de620_set_register(struct net_device *dev, byte reg, byte value)
|
418 |
|
|
{
|
419 |
|
|
de620_ready(dev);
|
420 |
|
|
outb(reg, DATA_PORT);
|
421 |
|
|
outb(NIC_Cmd ^ CS0, COMMAND_PORT);
|
422 |
|
|
|
423 |
|
|
de620_put_byte(dev, value);
|
424 |
|
|
}
|
425 |
|
|
|
426 |
|
|
static inline byte
|
427 |
|
|
de620_get_register(struct net_device *dev, byte reg)
|
428 |
|
|
{
|
429 |
|
|
byte value;
|
430 |
|
|
|
431 |
|
|
de620_send_command(dev,reg);
|
432 |
|
|
value = de620_read_byte(dev);
|
433 |
|
|
de620_send_command(dev,W_DUMMY);
|
434 |
|
|
|
435 |
|
|
return value;
|
436 |
|
|
}
|
437 |
|
|
|
438 |
|
|
/*********************************************************************
|
439 |
|
|
*
|
440 |
|
|
* Open/initialize the board.
|
441 |
|
|
*
|
442 |
|
|
* This routine should set everything up anew at each open, even
|
443 |
|
|
* registers that "should" only need to be set once at boot, so that
|
444 |
|
|
* there is a non-reboot way to recover if something goes wrong.
|
445 |
|
|
*
|
446 |
|
|
*/
|
447 |
|
|
static int de620_open(struct net_device *dev)
|
448 |
|
|
{
|
449 |
|
|
int ret = request_irq(dev->irq, de620_interrupt, 0, dev->name, dev);
|
450 |
|
|
if (ret) {
|
451 |
|
|
printk (KERN_ERR "%s: unable to get IRQ %d\n", dev->name, dev->irq);
|
452 |
|
|
return ret;
|
453 |
|
|
}
|
454 |
|
|
|
455 |
|
|
if (adapter_init(dev)) {
|
456 |
|
|
ret = -EIO;
|
457 |
|
|
goto out_free_irq;
|
458 |
|
|
}
|
459 |
|
|
|
460 |
|
|
netif_start_queue(dev);
|
461 |
|
|
return 0;
|
462 |
|
|
|
463 |
|
|
out_free_irq:
|
464 |
|
|
free_irq(dev->irq, dev);
|
465 |
|
|
return ret;
|
466 |
|
|
}
|
467 |
|
|
|
468 |
|
|
/************************************************
|
469 |
|
|
*
|
470 |
|
|
* The inverse routine to de620_open().
|
471 |
|
|
*
|
472 |
|
|
*/
|
473 |
|
|
|
474 |
|
|
static int de620_close(struct net_device *dev)
|
475 |
|
|
{
|
476 |
|
|
netif_stop_queue(dev);
|
477 |
|
|
/* disable recv */
|
478 |
|
|
de620_set_register(dev, W_TCR, RXOFF);
|
479 |
|
|
free_irq(dev->irq, dev);
|
480 |
|
|
return 0;
|
481 |
|
|
}
|
482 |
|
|
|
483 |
|
|
/*********************************************
|
484 |
|
|
*
|
485 |
|
|
* Return current statistics
|
486 |
|
|
*
|
487 |
|
|
*/
|
488 |
|
|
static struct net_device_stats *get_stats(struct net_device *dev)
|
489 |
|
|
{
|
490 |
|
|
return (struct net_device_stats *)(dev->priv);
|
491 |
|
|
}
|
492 |
|
|
|
493 |
|
|
/*********************************************
|
494 |
|
|
*
|
495 |
|
|
* Set or clear the multicast filter for this adaptor.
|
496 |
|
|
* (no real multicast implemented for the DE-620, but she can be promiscuous...)
|
497 |
|
|
*
|
498 |
|
|
*/
|
499 |
|
|
|
500 |
|
|
static void de620_set_multicast_list(struct net_device *dev)
|
501 |
|
|
{
|
502 |
|
|
if (dev->mc_count || dev->flags&(IFF_ALLMULTI|IFF_PROMISC))
|
503 |
|
|
{ /* Enable promiscuous mode */
|
504 |
|
|
/*
|
505 |
|
|
* We must make the kernel realise we had to move
|
506 |
|
|
* into promisc mode or we start all out war on
|
507 |
|
|
* the cable. - AC
|
508 |
|
|
*/
|
509 |
|
|
dev->flags|=IFF_PROMISC;
|
510 |
|
|
|
511 |
|
|
de620_set_register(dev, W_TCR, (TCR_DEF & ~RXPBM) | RXALL);
|
512 |
|
|
}
|
513 |
|
|
else
|
514 |
|
|
{ /* Disable promiscuous mode, use normal mode */
|
515 |
|
|
de620_set_register(dev, W_TCR, TCR_DEF);
|
516 |
|
|
}
|
517 |
|
|
}
|
518 |
|
|
|
519 |
|
|
/*******************************************************
|
520 |
|
|
*
|
521 |
|
|
* Handle timeouts on transmit
|
522 |
|
|
*/
|
523 |
|
|
|
524 |
|
|
static void de620_timeout(struct net_device *dev)
|
525 |
|
|
{
|
526 |
|
|
printk("%s: transmit timed out, %s?\n",
|
527 |
|
|
dev->name,
|
528 |
|
|
"network cable problem"
|
529 |
|
|
);
|
530 |
|
|
/* Restart the adapter. */
|
531 |
|
|
if (!adapter_init(dev)) /* maybe close it */
|
532 |
|
|
netif_wake_queue(dev);
|
533 |
|
|
}
|
534 |
|
|
|
535 |
|
|
/*******************************************************
|
536 |
|
|
*
|
537 |
|
|
* Copy a buffer to the adapter transmit page memory.
|
538 |
|
|
* Start sending.
|
539 |
|
|
*/
|
540 |
|
|
static int de620_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
541 |
|
|
{
|
542 |
|
|
unsigned long flags;
|
543 |
|
|
int len;
|
544 |
|
|
byte *buffer = skb->data;
|
545 |
|
|
byte using_txbuf;
|
546 |
|
|
|
547 |
|
|
using_txbuf = de620_tx_buffs(dev); /* Peek at the adapter */
|
548 |
|
|
|
549 |
|
|
netif_stop_queue(dev);
|
550 |
|
|
|
551 |
|
|
|
552 |
|
|
if ((len = skb->len) < RUNT)
|
553 |
|
|
len = RUNT;
|
554 |
|
|
if (len & 1) /* send an even number of bytes */
|
555 |
|
|
++len;
|
556 |
|
|
|
557 |
|
|
/* Start real output */
|
558 |
|
|
save_flags(flags);
|
559 |
|
|
cli();
|
560 |
|
|
|
561 |
|
|
PRINTK(("de620_start_xmit: len=%d, bufs 0x%02x\n",
|
562 |
|
|
(int)skb->len, using_txbuf));
|
563 |
|
|
|
564 |
|
|
/* select a free tx buffer. if there is one... */
|
565 |
|
|
switch (using_txbuf) {
|
566 |
|
|
default: /* both are free: use TXBF0 */
|
567 |
|
|
case TXBF1: /* use TXBF0 */
|
568 |
|
|
de620_send_command(dev,W_CR | RW0);
|
569 |
|
|
using_txbuf |= TXBF0;
|
570 |
|
|
break;
|
571 |
|
|
|
572 |
|
|
case TXBF0: /* use TXBF1 */
|
573 |
|
|
de620_send_command(dev,W_CR | RW1);
|
574 |
|
|
using_txbuf |= TXBF1;
|
575 |
|
|
break;
|
576 |
|
|
|
577 |
|
|
case (TXBF0 | TXBF1): /* NONE!!! */
|
578 |
|
|
printk(KERN_WARNING "%s: No tx-buffer available!\n", dev->name);
|
579 |
|
|
restore_flags(flags);
|
580 |
|
|
return 1;
|
581 |
|
|
}
|
582 |
|
|
de620_write_block(dev, buffer, skb->len, len-skb->len);
|
583 |
|
|
|
584 |
|
|
dev->trans_start = jiffies;
|
585 |
|
|
if(!(using_txbuf == (TXBF0 | TXBF1)))
|
586 |
|
|
netif_wake_queue(dev);
|
587 |
|
|
|
588 |
|
|
((struct net_device_stats *)(dev->priv))->tx_packets++;
|
589 |
|
|
restore_flags(flags); /* interrupts maybe back on */
|
590 |
|
|
dev_kfree_skb (skb);
|
591 |
|
|
return 0;
|
592 |
|
|
}
|
593 |
|
|
|
594 |
|
|
/*****************************************************
|
595 |
|
|
*
|
596 |
|
|
* Handle the network interface interrupts.
|
597 |
|
|
*
|
598 |
|
|
*/
|
599 |
|
|
static void de620_interrupt(int irq_in, void *dev_id, struct pt_regs *regs)
|
600 |
|
|
{
|
601 |
|
|
struct net_device *dev = dev_id;
|
602 |
|
|
byte irq_status;
|
603 |
|
|
int bogus_count = 0;
|
604 |
|
|
int again = 0;
|
605 |
|
|
|
606 |
|
|
/* This might be deleted now, no crummy drivers present :-) Or..? */
|
607 |
|
|
if ((dev == NULL) || (irq != irq_in)) {
|
608 |
|
|
printk("%s: bogus interrupt %d\n", dev?dev->name:"de620", irq_in);
|
609 |
|
|
return;
|
610 |
|
|
}
|
611 |
|
|
|
612 |
|
|
/* Read the status register (_not_ the status port) */
|
613 |
|
|
irq_status = de620_get_register(dev, R_STS);
|
614 |
|
|
|
615 |
|
|
PRINTK(("de620_interrupt (%2.2X)\n", irq_status));
|
616 |
|
|
|
617 |
|
|
if (irq_status & RXGOOD) {
|
618 |
|
|
do {
|
619 |
|
|
again = de620_rx_intr(dev);
|
620 |
|
|
PRINTK(("again=%d\n", again));
|
621 |
|
|
}
|
622 |
|
|
while (again && (++bogus_count < 100));
|
623 |
|
|
}
|
624 |
|
|
|
625 |
|
|
if(de620_tx_buffs(dev) != (TXBF0 | TXBF1))
|
626 |
|
|
netif_wake_queue(dev);
|
627 |
|
|
}
|
628 |
|
|
|
629 |
|
|
/**************************************
|
630 |
|
|
*
|
631 |
|
|
* Get a packet from the adapter
|
632 |
|
|
*
|
633 |
|
|
* Send it "upstairs"
|
634 |
|
|
*
|
635 |
|
|
*/
|
636 |
|
|
static int de620_rx_intr(struct net_device *dev)
|
637 |
|
|
{
|
638 |
|
|
struct header_buf {
|
639 |
|
|
byte status;
|
640 |
|
|
byte Rx_NextPage;
|
641 |
|
|
unsigned short Rx_ByteCount;
|
642 |
|
|
} header_buf;
|
643 |
|
|
struct sk_buff *skb;
|
644 |
|
|
int size;
|
645 |
|
|
byte *buffer;
|
646 |
|
|
byte pagelink;
|
647 |
|
|
byte curr_page;
|
648 |
|
|
|
649 |
|
|
PRINTK(("de620_rx_intr: next_rx_page = %d\n", next_rx_page));
|
650 |
|
|
|
651 |
|
|
/* Tell the adapter that we are going to read data, and from where */
|
652 |
|
|
de620_send_command(dev, W_CR | RRN);
|
653 |
|
|
de620_set_register(dev, W_RSA1, next_rx_page);
|
654 |
|
|
de620_set_register(dev, W_RSA0, 0);
|
655 |
|
|
|
656 |
|
|
/* Deep breath, and away we goooooo */
|
657 |
|
|
de620_read_block(dev, (byte *)&header_buf, sizeof(struct header_buf));
|
658 |
|
|
PRINTK(("page status=0x%02x, nextpage=%d, packetsize=%d\n",
|
659 |
|
|
header_buf.status, header_buf.Rx_NextPage, header_buf.Rx_ByteCount));
|
660 |
|
|
|
661 |
|
|
/* Plausible page header? */
|
662 |
|
|
pagelink = header_buf.Rx_NextPage;
|
663 |
|
|
if ((pagelink < first_rx_page) || (last_rx_page < pagelink)) {
|
664 |
|
|
/* Ouch... Forget it! Skip all and start afresh... */
|
665 |
|
|
printk(KERN_WARNING "%s: Ring overrun? Restoring...\n", dev->name);
|
666 |
|
|
/* You win some, you lose some. And sometimes plenty... */
|
667 |
|
|
adapter_init(dev);
|
668 |
|
|
netif_wake_queue(dev);
|
669 |
|
|
((struct net_device_stats *)(dev->priv))->rx_over_errors++;
|
670 |
|
|
return 0;
|
671 |
|
|
}
|
672 |
|
|
|
673 |
|
|
/* OK, this look good, so far. Let's see if it's consistent... */
|
674 |
|
|
/* Let's compute the start of the next packet, based on where we are */
|
675 |
|
|
pagelink = next_rx_page +
|
676 |
|
|
((header_buf.Rx_ByteCount + (4 - 1 + 0x100)) >> 8);
|
677 |
|
|
|
678 |
|
|
/* Are we going to wrap around the page counter? */
|
679 |
|
|
if (pagelink > last_rx_page)
|
680 |
|
|
pagelink -= (last_rx_page - first_rx_page + 1);
|
681 |
|
|
|
682 |
|
|
/* Is the _computed_ next page number equal to what the adapter says? */
|
683 |
|
|
if (pagelink != header_buf.Rx_NextPage) {
|
684 |
|
|
/* Naah, we'll skip this packet. Probably bogus data as well */
|
685 |
|
|
printk(KERN_WARNING "%s: Page link out of sync! Restoring...\n", dev->name);
|
686 |
|
|
next_rx_page = header_buf.Rx_NextPage; /* at least a try... */
|
687 |
|
|
de620_send_command(dev, W_DUMMY);
|
688 |
|
|
de620_set_register(dev, W_NPRF, next_rx_page);
|
689 |
|
|
((struct net_device_stats *)(dev->priv))->rx_over_errors++;
|
690 |
|
|
return 0;
|
691 |
|
|
}
|
692 |
|
|
next_rx_page = pagelink;
|
693 |
|
|
|
694 |
|
|
size = header_buf.Rx_ByteCount - 4;
|
695 |
|
|
if ((size < RUNT) || (GIANT < size)) {
|
696 |
|
|
printk(KERN_WARNING "%s: Illegal packet size: %d!\n", dev->name, size);
|
697 |
|
|
}
|
698 |
|
|
else { /* Good packet? */
|
699 |
|
|
skb = dev_alloc_skb(size+2);
|
700 |
|
|
if (skb == NULL) { /* Yeah, but no place to put it... */
|
701 |
|
|
printk(KERN_WARNING "%s: Couldn't allocate a sk_buff of size %d.\n",
|
702 |
|
|
dev->name, size);
|
703 |
|
|
((struct net_device_stats *)(dev->priv))->rx_dropped++;
|
704 |
|
|
}
|
705 |
|
|
else { /* Yep! Go get it! */
|
706 |
|
|
skb_reserve(skb,2); /* Align */
|
707 |
|
|
skb->dev = dev;
|
708 |
|
|
/* skb->data points to the start of sk_buff data area */
|
709 |
|
|
buffer = skb_put(skb,size);
|
710 |
|
|
/* copy the packet into the buffer */
|
711 |
|
|
de620_read_block(dev, buffer, size);
|
712 |
|
|
PRINTK(("Read %d bytes\n", size));
|
713 |
|
|
skb->protocol=eth_type_trans(skb,dev);
|
714 |
|
|
netif_rx(skb); /* deliver it "upstairs" */
|
715 |
|
|
dev->last_rx = jiffies;
|
716 |
|
|
/* count all receives */
|
717 |
|
|
((struct net_device_stats *)(dev->priv))->rx_packets++;
|
718 |
|
|
((struct net_device_stats *)(dev->priv))->rx_bytes += size;
|
719 |
|
|
}
|
720 |
|
|
}
|
721 |
|
|
|
722 |
|
|
/* Let's peek ahead to see if we have read the last current packet */
|
723 |
|
|
/* NOTE! We're _not_ checking the 'EMPTY'-flag! This seems better... */
|
724 |
|
|
curr_page = de620_get_register(dev, R_CPR);
|
725 |
|
|
de620_set_register(dev, W_NPRF, next_rx_page);
|
726 |
|
|
PRINTK(("next_rx_page=%d CPR=%d\n", next_rx_page, curr_page));
|
727 |
|
|
|
728 |
|
|
return (next_rx_page != curr_page); /* That was slightly tricky... */
|
729 |
|
|
}
|
730 |
|
|
|
731 |
|
|
/*********************************************
|
732 |
|
|
*
|
733 |
|
|
* Reset the adapter to a known state
|
734 |
|
|
*
|
735 |
|
|
*/
|
736 |
|
|
static int adapter_init(struct net_device *dev)
|
737 |
|
|
{
|
738 |
|
|
int i;
|
739 |
|
|
static int was_down;
|
740 |
|
|
|
741 |
|
|
if ((nic_data.Model == 3) || (nic_data.Model == 0)) { /* CT */
|
742 |
|
|
EIPRegister = NCTL0;
|
743 |
|
|
if (nic_data.Media != 1)
|
744 |
|
|
EIPRegister |= NIS0; /* not BNC */
|
745 |
|
|
}
|
746 |
|
|
else if (nic_data.Model == 2) { /* UTP */
|
747 |
|
|
EIPRegister = NCTL0 | NIS0;
|
748 |
|
|
}
|
749 |
|
|
|
750 |
|
|
if (utp)
|
751 |
|
|
EIPRegister = NCTL0 | NIS0;
|
752 |
|
|
if (bnc)
|
753 |
|
|
EIPRegister = NCTL0;
|
754 |
|
|
|
755 |
|
|
de620_send_command(dev, W_CR | RNOP | CLEAR);
|
756 |
|
|
de620_send_command(dev, W_CR | RNOP);
|
757 |
|
|
|
758 |
|
|
de620_set_register(dev, W_SCR, SCR_DEF);
|
759 |
|
|
/* disable recv to wait init */
|
760 |
|
|
de620_set_register(dev, W_TCR, RXOFF);
|
761 |
|
|
|
762 |
|
|
/* Set the node ID in the adapter */
|
763 |
|
|
for (i = 0; i < 6; ++i) { /* W_PARn = 0xaa + n */
|
764 |
|
|
de620_set_register(dev, W_PAR0 + i, dev->dev_addr[i]);
|
765 |
|
|
}
|
766 |
|
|
|
767 |
|
|
de620_set_register(dev, W_EIP, EIPRegister);
|
768 |
|
|
|
769 |
|
|
next_rx_page = first_rx_page = DE620_RX_START_PAGE;
|
770 |
|
|
if (nic_data.RAM_Size)
|
771 |
|
|
last_rx_page = nic_data.RAM_Size - 1;
|
772 |
|
|
else /* 64k RAM */
|
773 |
|
|
last_rx_page = 255;
|
774 |
|
|
|
775 |
|
|
de620_set_register(dev, W_SPR, first_rx_page); /* Start Page Register*/
|
776 |
|
|
de620_set_register(dev, W_EPR, last_rx_page); /* End Page Register */
|
777 |
|
|
de620_set_register(dev, W_CPR, first_rx_page);/*Current Page Register*/
|
778 |
|
|
de620_send_command(dev, W_NPR | first_rx_page); /* Next Page Register*/
|
779 |
|
|
de620_send_command(dev, W_DUMMY);
|
780 |
|
|
de620_set_delay(dev);
|
781 |
|
|
|
782 |
|
|
/* Final sanity check: Anybody out there? */
|
783 |
|
|
/* Let's hope some bits from the statusregister make a good check */
|
784 |
|
|
#define CHECK_MASK ( 0 | TXSUC | T16 | 0 | RXCRC | RXSHORT | 0 | 0 )
|
785 |
|
|
#define CHECK_OK ( 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 )
|
786 |
|
|
/* success: X 0 0 X 0 0 X X */
|
787 |
|
|
/* ignore: EEDI RXGOOD COLS LNKS*/
|
788 |
|
|
|
789 |
|
|
if (((i = de620_get_register(dev, R_STS)) & CHECK_MASK) != CHECK_OK) {
|
790 |
|
|
printk(KERN_ERR "%s: Something has happened to the DE-620! Please check it"
|
791 |
|
|
#ifdef SHUTDOWN_WHEN_LOST
|
792 |
|
|
" and do a new ifconfig"
|
793 |
|
|
#endif
|
794 |
|
|
"! (%02x)\n", dev->name, i);
|
795 |
|
|
#ifdef SHUTDOWN_WHEN_LOST
|
796 |
|
|
/* Goodbye, cruel world... */
|
797 |
|
|
dev->flags &= ~IFF_UP;
|
798 |
|
|
de620_close(dev);
|
799 |
|
|
#endif
|
800 |
|
|
was_down = 1;
|
801 |
|
|
return 1; /* failed */
|
802 |
|
|
}
|
803 |
|
|
if (was_down) {
|
804 |
|
|
printk(KERN_WARNING "%s: Thanks, I feel much better now!\n", dev->name);
|
805 |
|
|
was_down = 0;
|
806 |
|
|
}
|
807 |
|
|
|
808 |
|
|
/* All OK, go ahead... */
|
809 |
|
|
de620_set_register(dev, W_TCR, TCR_DEF);
|
810 |
|
|
|
811 |
|
|
return 0; /* all ok */
|
812 |
|
|
}
|
813 |
|
|
|
814 |
|
|
/******************************************************************************
|
815 |
|
|
*
|
816 |
|
|
* Only start-up code below
|
817 |
|
|
*
|
818 |
|
|
*/
|
819 |
|
|
/****************************************
|
820 |
|
|
*
|
821 |
|
|
* Check if there is a DE-620 connected
|
822 |
|
|
*/
|
823 |
|
|
int __init de620_probe(struct net_device *dev)
|
824 |
|
|
{
|
825 |
|
|
static struct net_device_stats de620_netstats;
|
826 |
|
|
int i;
|
827 |
|
|
byte checkbyte = 0xa5;
|
828 |
|
|
|
829 |
|
|
SET_MODULE_OWNER(dev);
|
830 |
|
|
|
831 |
|
|
/*
|
832 |
|
|
* This is where the base_addr and irq gets set.
|
833 |
|
|
* Tunable at compile-time and insmod-time
|
834 |
|
|
*/
|
835 |
|
|
dev->base_addr = io;
|
836 |
|
|
dev->irq = irq;
|
837 |
|
|
|
838 |
|
|
if (de620_debug)
|
839 |
|
|
printk(version);
|
840 |
|
|
|
841 |
|
|
printk(KERN_INFO "D-Link DE-620 pocket adapter");
|
842 |
|
|
|
843 |
|
|
/* Initially, configure basic nibble mode, so we can read the EEPROM */
|
844 |
|
|
NIC_Cmd = DEF_NIC_CMD;
|
845 |
|
|
de620_set_register(dev, W_EIP, EIPRegister);
|
846 |
|
|
|
847 |
|
|
/* Anybody out there? */
|
848 |
|
|
de620_set_register(dev, W_CPR, checkbyte);
|
849 |
|
|
checkbyte = de620_get_register(dev, R_CPR);
|
850 |
|
|
|
851 |
|
|
if ((checkbyte != 0xa5) || (read_eeprom(dev) != 0)) {
|
852 |
|
|
printk(" not identified in the printer port\n");
|
853 |
|
|
return -ENODEV;
|
854 |
|
|
}
|
855 |
|
|
|
856 |
|
|
if (!request_region(dev->base_addr, 3, "de620")) {
|
857 |
|
|
printk(KERN_ERR "io 0x%3lX, which is busy.\n", dev->base_addr);
|
858 |
|
|
return -EBUSY;
|
859 |
|
|
}
|
860 |
|
|
|
861 |
|
|
/* else, got it! */
|
862 |
|
|
printk(", Ethernet Address: %2.2X",
|
863 |
|
|
dev->dev_addr[0] = nic_data.NodeID[0]);
|
864 |
|
|
for (i = 1; i < ETH_ALEN; i++) {
|
865 |
|
|
printk(":%2.2X", dev->dev_addr[i] = nic_data.NodeID[i]);
|
866 |
|
|
dev->broadcast[i] = 0xff;
|
867 |
|
|
}
|
868 |
|
|
|
869 |
|
|
printk(" (%dk RAM,",
|
870 |
|
|
(nic_data.RAM_Size) ? (nic_data.RAM_Size >> 2) : 64);
|
871 |
|
|
|
872 |
|
|
if (nic_data.Media == 1)
|
873 |
|
|
printk(" BNC)\n");
|
874 |
|
|
else
|
875 |
|
|
printk(" UTP)\n");
|
876 |
|
|
|
877 |
|
|
/* Initialize the device structure. */
|
878 |
|
|
dev->priv = &de620_netstats;
|
879 |
|
|
|
880 |
|
|
memset(dev->priv, 0, sizeof(struct net_device_stats));
|
881 |
|
|
dev->get_stats = get_stats;
|
882 |
|
|
dev->open = de620_open;
|
883 |
|
|
dev->stop = de620_close;
|
884 |
|
|
dev->hard_start_xmit = de620_start_xmit;
|
885 |
|
|
dev->tx_timeout = de620_timeout;
|
886 |
|
|
dev->watchdog_timeo = HZ*2;
|
887 |
|
|
dev->set_multicast_list = de620_set_multicast_list;
|
888 |
|
|
|
889 |
|
|
/* base_addr and irq are already set, see above! */
|
890 |
|
|
|
891 |
|
|
ether_setup(dev);
|
892 |
|
|
|
893 |
|
|
/* dump eeprom */
|
894 |
|
|
if (de620_debug) {
|
895 |
|
|
printk("\nEEPROM contents:\n");
|
896 |
|
|
printk("RAM_Size = 0x%02X\n", nic_data.RAM_Size);
|
897 |
|
|
printk("NodeID = %02X:%02X:%02X:%02X:%02X:%02X\n",
|
898 |
|
|
nic_data.NodeID[0], nic_data.NodeID[1],
|
899 |
|
|
nic_data.NodeID[2], nic_data.NodeID[3],
|
900 |
|
|
nic_data.NodeID[4], nic_data.NodeID[5]);
|
901 |
|
|
printk("Model = %d\n", nic_data.Model);
|
902 |
|
|
printk("Media = %d\n", nic_data.Media);
|
903 |
|
|
printk("SCR = 0x%02x\n", nic_data.SCR);
|
904 |
|
|
}
|
905 |
|
|
|
906 |
|
|
return 0;
|
907 |
|
|
}
|
908 |
|
|
|
909 |
|
|
/**********************************
|
910 |
|
|
*
|
911 |
|
|
* Read info from on-board EEPROM
|
912 |
|
|
*
|
913 |
|
|
* Note: Bitwise serial I/O to/from the EEPROM vi the status _register_!
|
914 |
|
|
*/
|
915 |
|
|
#define sendit(dev,data) de620_set_register(dev, W_EIP, data | EIPRegister);
|
916 |
|
|
|
917 |
|
|
static unsigned short __init ReadAWord(struct net_device *dev, int from)
|
918 |
|
|
{
|
919 |
|
|
unsigned short data;
|
920 |
|
|
int nbits;
|
921 |
|
|
|
922 |
|
|
/* cs [__~~] SET SEND STATE */
|
923 |
|
|
/* di [____] */
|
924 |
|
|
/* sck [_~~_] */
|
925 |
|
|
sendit(dev, 0); sendit(dev, 1); sendit(dev, 5); sendit(dev, 4);
|
926 |
|
|
|
927 |
|
|
/* Send the 9-bit address from where we want to read the 16-bit word */
|
928 |
|
|
for (nbits = 9; nbits > 0; --nbits, from <<= 1) {
|
929 |
|
|
if (from & 0x0100) { /* bit set? */
|
930 |
|
|
/* cs [~~~~] SEND 1 */
|
931 |
|
|
/* di [~~~~] */
|
932 |
|
|
/* sck [_~~_] */
|
933 |
|
|
sendit(dev, 6); sendit(dev, 7); sendit(dev, 7); sendit(dev, 6);
|
934 |
|
|
}
|
935 |
|
|
else {
|
936 |
|
|
/* cs [~~~~] SEND 0 */
|
937 |
|
|
/* di [____] */
|
938 |
|
|
/* sck [_~~_] */
|
939 |
|
|
sendit(dev, 4); sendit(dev, 5); sendit(dev, 5); sendit(dev, 4);
|
940 |
|
|
}
|
941 |
|
|
}
|
942 |
|
|
|
943 |
|
|
/* Shift in the 16-bit word. The bits appear serially in EEDI (=0x80) */
|
944 |
|
|
for (data = 0, nbits = 16; nbits > 0; --nbits) {
|
945 |
|
|
/* cs [~~~~] SEND 0 */
|
946 |
|
|
/* di [____] */
|
947 |
|
|
/* sck [_~~_] */
|
948 |
|
|
sendit(dev, 4); sendit(dev, 5); sendit(dev, 5); sendit(dev, 4);
|
949 |
|
|
data = (data << 1) | ((de620_get_register(dev, R_STS) & EEDI) >> 7);
|
950 |
|
|
}
|
951 |
|
|
/* cs [____] RESET SEND STATE */
|
952 |
|
|
/* di [____] */
|
953 |
|
|
/* sck [_~~_] */
|
954 |
|
|
sendit(dev, 0); sendit(dev, 1); sendit(dev, 1); sendit(dev, 0);
|
955 |
|
|
|
956 |
|
|
return data;
|
957 |
|
|
}
|
958 |
|
|
|
959 |
|
|
static int __init read_eeprom(struct net_device *dev)
|
960 |
|
|
{
|
961 |
|
|
unsigned short wrd;
|
962 |
|
|
|
963 |
|
|
/* D-Link Ethernet addresses are in the series 00:80:c8:7X:XX:XX:XX */
|
964 |
|
|
wrd = ReadAWord(dev, 0x1aa); /* bytes 0 + 1 of NodeID */
|
965 |
|
|
if (!clone && (wrd != htons(0x0080))) /* Valid D-Link ether sequence? */
|
966 |
|
|
return -1; /* Nope, not a DE-620 */
|
967 |
|
|
nic_data.NodeID[0] = wrd & 0xff;
|
968 |
|
|
nic_data.NodeID[1] = wrd >> 8;
|
969 |
|
|
|
970 |
|
|
wrd = ReadAWord(dev, 0x1ab); /* bytes 2 + 3 of NodeID */
|
971 |
|
|
if (!clone && ((wrd & 0xff) != 0xc8)) /* Valid D-Link ether sequence? */
|
972 |
|
|
return -1; /* Nope, not a DE-620 */
|
973 |
|
|
nic_data.NodeID[2] = wrd & 0xff;
|
974 |
|
|
nic_data.NodeID[3] = wrd >> 8;
|
975 |
|
|
|
976 |
|
|
wrd = ReadAWord(dev, 0x1ac); /* bytes 4 + 5 of NodeID */
|
977 |
|
|
nic_data.NodeID[4] = wrd & 0xff;
|
978 |
|
|
nic_data.NodeID[5] = wrd >> 8;
|
979 |
|
|
|
980 |
|
|
wrd = ReadAWord(dev, 0x1ad); /* RAM size in pages (256 bytes). 0 = 64k */
|
981 |
|
|
nic_data.RAM_Size = (wrd >> 8);
|
982 |
|
|
|
983 |
|
|
wrd = ReadAWord(dev, 0x1ae); /* hardware model (CT = 3) */
|
984 |
|
|
nic_data.Model = (wrd & 0xff);
|
985 |
|
|
|
986 |
|
|
wrd = ReadAWord(dev, 0x1af); /* media (indicates BNC/UTP) */
|
987 |
|
|
nic_data.Media = (wrd & 0xff);
|
988 |
|
|
|
989 |
|
|
wrd = ReadAWord(dev, 0x1a8); /* System Configuration Register */
|
990 |
|
|
nic_data.SCR = (wrd >> 8);
|
991 |
|
|
|
992 |
|
|
return 0; /* no errors */
|
993 |
|
|
}
|
994 |
|
|
|
995 |
|
|
/******************************************************************************
|
996 |
|
|
*
|
997 |
|
|
* Loadable module skeleton
|
998 |
|
|
*
|
999 |
|
|
*/
|
1000 |
|
|
#ifdef MODULE
|
1001 |
|
|
static struct net_device de620_dev;
|
1002 |
|
|
|
1003 |
|
|
int init_module(void)
|
1004 |
|
|
{
|
1005 |
|
|
de620_dev.init = de620_probe;
|
1006 |
|
|
if (register_netdev(&de620_dev) != 0)
|
1007 |
|
|
return -EIO;
|
1008 |
|
|
return 0;
|
1009 |
|
|
}
|
1010 |
|
|
|
1011 |
|
|
void cleanup_module(void)
|
1012 |
|
|
{
|
1013 |
|
|
unregister_netdev(&de620_dev);
|
1014 |
|
|
release_region(de620_dev.base_addr, 3);
|
1015 |
|
|
}
|
1016 |
|
|
#endif /* MODULE */
|
1017 |
|
|
MODULE_LICENSE("GPL");
|
1018 |
|
|
|
1019 |
|
|
|
1020 |
|
|
/*
|
1021 |
|
|
* (add '-DMODULE' when compiling as loadable module)
|
1022 |
|
|
*
|
1023 |
|
|
* compile-command:
|
1024 |
|
|
* gcc -D__KERNEL__ -Wall -Wstrict-prototypes -O2 \
|
1025 |
|
|
* -fomit-frame-pointer -m486 \
|
1026 |
|
|
* -I/usr/src/linux/include -I../../net/inet -c de620.c
|
1027 |
|
|
*/
|
1028 |
|
|
/*
|
1029 |
|
|
* Local variables:
|
1030 |
|
|
* kernel-compile-command: "gcc -D__KERNEL__ -Ilinux/include -I../../net/inet -Wall -Wstrict-prototypes -O2 -m486 -c de620.c"
|
1031 |
|
|
* module-compile-command: "gcc -D__KERNEL__ -DMODULE -Ilinux/include -I../../net/inet -Wall -Wstrict-prototypes -O2 -m486 -c de620.c"
|
1032 |
|
|
* compile-command: "gcc -D__KERNEL__ -DMODULE -Ilinux/include -I../../net/inet -Wall -Wstrict-prototypes -O2 -m486 -c de620.c"
|
1033 |
|
|
* End:
|
1034 |
|
|
*/
|