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|
/* cops.c: LocalTalk driver for Linux.
*
* Authors:
* - Jay Schulist <jschlst@samba.org>
*
* With more than a little help from;
* - Alan Cox <alan@lxorguk.ukuu.org.uk>
*
* Derived from:
* - skeleton.c: A network driver outline for linux.
* Written 1993-94 by Donald Becker.
* - ltpc.c: A driver for the LocalTalk PC card.
* Written by Bradford W. Johnson.
*
* Copyright 1993 United States Government as represented by the
* Director, National Security Agency.
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
* Changes:
* 19970608 Alan Cox Allowed dual card type support
* Can set board type in insmod
* Hooks for cops_setup routine
* (not yet implemented).
* 19971101 Jay Schulist Fixes for multiple lt* devices.
* 19980607 Steven Hirsch Fixed the badly broken support
* for Tangent type cards. Only
* tested on Daystar LT200. Some
* cleanup of formatting and program
* logic. Added emacs 'local-vars'
* setup for Jay's brace style.
* 20000211 Alan Cox Cleaned up for softnet
*/
static const char *version =
"cops.c:v0.04 6/7/98 Jay Schulist <jschlst@samba.org>\n";
/*
* Sources:
* COPS Localtalk SDK. This provides almost all of the information
* needed.
*/
/*
* insmod/modprobe configurable stuff.
* - IO Port, choose one your card supports or 0 if you dare.
* - IRQ, also choose one your card supports or nothing and let
* the driver figure it out.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/if_ltalk.h>
#include <linux/delay.h> /* For udelay() */
#include <linux/atalk.h>
#include <linux/spinlock.h>
#include <linux/bitops.h>
#include <linux/jiffies.h>
#include <asm/io.h>
#include <asm/dma.h>
#include "cops.h" /* Our Stuff */
#include "cops_ltdrv.h" /* Firmware code for Tangent type cards. */
#include "cops_ffdrv.h" /* Firmware code for Dayna type cards. */
/*
* The name of the card. Is used for messages and in the requests for
* io regions, irqs and dma channels
*/
static const char *cardname = "cops";
#ifdef CONFIG_COPS_DAYNA
static int board_type = DAYNA; /* Module exported */
#else
static int board_type = TANGENT;
#endif
static int io = 0x240; /* Default IO for Dayna */
static int irq = 5; /* Default IRQ */
/*
* COPS Autoprobe information.
* Right now if port address is right but IRQ is not 5 this will
* return a 5 no matter what since we will still get a status response.
* Need one more additional check to narrow down after we have gotten
* the ioaddr. But since only other possible IRQs is 3 and 4 so no real
* hurry on this. I *STRONGLY* recommend using IRQ 5 for your card with
* this driver.
*
* This driver has 2 modes and they are: Dayna mode and Tangent mode.
* Each mode corresponds with the type of card. It has been found
* that there are 2 main types of cards and all other cards are
* the same and just have different names or only have minor differences
* such as more IO ports. As this driver is tested it will
* become more clear on exactly what cards are supported. The driver
* defaults to using Dayna mode. To change the drivers mode, simply
* select Dayna or Tangent mode when configuring the kernel.
*
* This driver should support:
* TANGENT driver mode:
* Tangent ATB-II, Novell NL-1000, Daystar Digital LT-200,
* COPS LT-1
* DAYNA driver mode:
* Dayna DL2000/DaynaTalk PC (Half Length), COPS LT-95,
* Farallon PhoneNET PC III, Farallon PhoneNET PC II
* Other cards possibly supported mode unknown though:
* Dayna DL2000 (Full length), COPS LT/M (Micro-Channel)
*
* Cards NOT supported by this driver but supported by the ltpc.c
* driver written by Bradford W. Johnson <johns393@maroon.tc.umn.edu>
* Farallon PhoneNET PC
* Original Apple LocalTalk PC card
*
* N.B.
*
* The Daystar Digital LT200 boards do not support interrupt-driven
* IO. You must specify 'irq=0xff' as a module parameter to invoke
* polled mode. I also believe that the port probing logic is quite
* dangerous at best and certainly hopeless for a polled card. Best to
* specify both. - Steve H.
*
*/
/*
* Zero terminated list of IO ports to probe.
*/
static unsigned int ports[] = {
0x240, 0x340, 0x200, 0x210, 0x220, 0x230, 0x260,
0x2A0, 0x300, 0x310, 0x320, 0x330, 0x350, 0x360,
0
};
/*
* Zero terminated list of IRQ ports to probe.
*/
static int cops_irqlist[] = {
5, 4, 3, 0
};
static struct timer_list cops_timer;
/* use 0 for production, 1 for verification, 2 for debug, 3 for verbose debug */
#ifndef COPS_DEBUG
#define COPS_DEBUG 1
#endif
static unsigned int cops_debug = COPS_DEBUG;
/* The number of low I/O ports used by the card. */
#define COPS_IO_EXTENT 8
/* Information that needs to be kept for each board. */
struct cops_local
{
int board; /* Holds what board type is. */
int nodeid; /* Set to 1 once have nodeid. */
unsigned char node_acquire; /* Node ID when acquired. */
struct atalk_addr node_addr; /* Full node address */
spinlock_t lock; /* RX/TX lock */
};
/* Index to functions, as function prototypes. */
static int cops_probe1 (struct net_device *dev, int ioaddr);
static int cops_irq (int ioaddr, int board);
static int cops_open (struct net_device *dev);
static int cops_jumpstart (struct net_device *dev);
static void cops_reset (struct net_device *dev, int sleep);
static void cops_load (struct net_device *dev);
static int cops_nodeid (struct net_device *dev, int nodeid);
static irqreturn_t cops_interrupt (int irq, void *dev_id);
static void cops_poll (unsigned long ltdev);
static void cops_timeout(struct net_device *dev);
static void cops_rx (struct net_device *dev);
static netdev_tx_t cops_send_packet (struct sk_buff *skb,
struct net_device *dev);
static void set_multicast_list (struct net_device *dev);
static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
static int cops_close (struct net_device *dev);
static void cleanup_card
|