2 * Linux ARCnet driver - COM20020 chipset support
4 * Written 1997 by David Woodhouse.
5 * Written 1994-1999 by Avery Pennarun.
6 * Written 1999-2000 by Martin Mares <mj@ucw.cz>.
7 * Derived from skeleton.c by Donald Becker.
9 * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
10 * for sponsoring the further development of this driver.
12 * **********************
14 * The original copyright of skeleton.c was as follows:
16 * skeleton.c Written 1993 by Donald Becker.
17 * Copyright 1993 United States Government as represented by the
18 * Director, National Security Agency. This software may only be used
19 * and distributed according to the terms of the GNU General Public License as
20 * modified by SRC, incorporated herein by reference.
22 * **********************
24 * For more details, see drivers/net/arcnet.c
26 * **********************
28 #include <linux/module.h>
29 #include <linux/moduleparam.h>
30 #include <linux/kernel.h>
31 #include <linux/types.h>
32 #include <linux/ioport.h>
33 #include <linux/errno.h>
34 #include <linux/delay.h>
35 #include <linux/netdevice.h>
36 #include <linux/init.h>
37 #include <linux/interrupt.h>
38 #include <linux/bootmem.h>
39 #include <linux/arcdevice.h>
40 #include <linux/com20020.h>
44 #define VERSION "arcnet: COM20020 ISA support (by David Woodhouse et al.)\n"
46 /* We cannot (yet) probe for an IO mapped card, although we can check that
47 * it's where we were told it was, and even do autoirq.
49 static int __init com20020isa_probe(struct net_device *dev)
52 unsigned long airqmask;
53 struct arcnet_local *lp = netdev_priv(dev);
56 BUGLVL(D_NORMAL) printk(VERSION);
58 ioaddr = dev->base_addr;
60 BUGMSG(D_NORMAL, "No autoprobe (yet) for IO mapped cards; you must specify the base address!\n");
63 if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) {
64 BUGMSG(D_NORMAL, "IO region %xh-%xh already allocated.\n",
65 ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
68 if (ASTATUS() == 0xFF) {
69 BUGMSG(D_NORMAL, "IO address %x empty\n", ioaddr);
73 if (com20020_check(dev)) {
79 /* if we do this, we're sure to get an IRQ since the
80 * card has just reset and the NORXflag is on until
81 * we tell it to start receiving.
83 BUGMSG(D_INIT_REASONS, "intmask was %02Xh\n", inb(_INTMASK));
85 airqmask = probe_irq_on();
86 outb(NORXflag, _INTMASK);
89 dev->irq = probe_irq_off(airqmask);
91 if ((int)dev->irq <= 0) {
92 BUGMSG(D_INIT_REASONS, "Autoprobe IRQ failed first time\n");
93 airqmask = probe_irq_on();
94 outb(NORXflag, _INTMASK);
97 dev->irq = probe_irq_off(airqmask);
98 if ((int)dev->irq <= 0) {
99 BUGMSG(D_NORMAL, "Autoprobe IRQ failed.\n");
106 lp->card_name = "ISA COM20020";
107 if ((err = com20020_found(dev, 0)) != 0)
113 release_region(ioaddr, ARCNET_TOTAL_SIZE);
118 static int io = 0x0; /* <--- EDIT THESE LINES FOR YOUR CONFIGURATION */
119 static int irq = 0; /* or use the insmod io= irq= shmem= options */
120 static char device[9]; /* use eg. device="arc1" to change name */
121 static int timeout = 3;
122 static int backplane = 0;
123 static int clockp = 0;
124 static int clockm = 0;
126 module_param(node, int, 0);
127 module_param(io, int, 0);
128 module_param(irq, int, 0);
129 module_param_string(device, device, sizeof(device), 0);
130 module_param(timeout, int, 0);
131 module_param(backplane, int, 0);
132 module_param(clockp, int, 0);
133 module_param(clockm, int, 0);
135 MODULE_LICENSE("GPL");
137 static struct net_device *my_dev;
139 static int __init com20020_init(void)
141 struct net_device *dev;
142 struct arcnet_local *lp;
144 dev = alloc_arcdev(device);
148 if (node && node != 0xff)
149 dev->dev_addr[0] = node;
151 dev->netdev_ops = &com20020_netdev_ops;
153 lp = netdev_priv(dev);
154 lp->backplane = backplane;
155 lp->clockp = clockp & 7;
156 lp->clockm = clockm & 3;
157 lp->timeout = timeout & 3;
158 lp->hw.owner = THIS_MODULE;
166 if (com20020isa_probe(dev)) {
175 static void __exit com20020_exit(void)
177 unregister_netdev(my_dev);
178 free_irq(my_dev->irq, my_dev);
179 release_region(my_dev->base_addr, ARCNET_TOTAL_SIZE);
184 static int __init com20020isa_setup(char *s)
188 s = get_options(s, 8, ints);
194 printk("com90xx: Too many arguments.\n");
195 case 6: /* Timeout */
197 case 5: /* CKP value */
199 case 4: /* Backplane flag */
201 case 3: /* Node ID */
205 case 1: /* IO address */
209 snprintf(device, sizeof(device), "%s", s);
213 __setup("com20020=", com20020isa_setup);
217 module_init(com20020_init)
218 module_exit(com20020_exit)