1 /*
2 * Linux ARCnet driver - COM20020 chipset support
3 *
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.
8 *
9 * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
10 * for sponsoring the further development of this driver.
11 *
12 * **********************
13 *
14 * The original copyright of skeleton.c was as follows:
15 *
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.
21 *
22 * **********************
23 *
24 * For more details, see drivers/net/arcnet.c
25 *
26 * **********************
27 */
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/bootmem.h>
38 #include <linux/arcdevice.h>
39 #include <linux/com20020.h>
40
41 #include <asm/io.h>
42
43 #define VERSION "arcnet: COM20020 ISA support (by David Woodhouse et al.)\n"
44
45
46 /*
47 * We cannot (yet) probe for an IO mapped card, although we can check that
48 * it's where we were told it was, and even do autoirq.
49 */
com20020isa_probe(struct net_device * dev)50 static int __init com20020isa_probe(struct net_device *dev)
51 {
52 int ioaddr;
53 unsigned long airqmask;
54 struct arcnet_local *lp = netdev_priv(dev);
55 int err;
56
57 BUGLVL(D_NORMAL) printk(VERSION);
58
59 ioaddr = dev->base_addr;
60 if (!ioaddr) {
61 BUGMSG(D_NORMAL, "No autoprobe (yet) for IO mapped cards; you "
62 "must specify the base address!\n");
63 return -ENODEV;
64 }
65 if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) {
66 BUGMSG(D_NORMAL, "IO region %xh-%xh already allocated.\n",
67 ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
68 return -ENXIO;
69 }
70 if (ASTATUS() == 0xFF) {
71 BUGMSG(D_NORMAL, "IO address %x empty\n", ioaddr);
72 err = -ENODEV;
73 goto out;
74 }
75 if (com20020_check(dev)) {
76 err = -ENODEV;
77 goto out;
78 }
79
80 if (!dev->irq) {
81 /* if we do this, we're sure to get an IRQ since the
82 * card has just reset and the NORXflag is on until
83 * we tell it to start receiving.
84 */
85 BUGMSG(D_INIT_REASONS, "intmask was %02Xh\n", inb(_INTMASK));
86 outb(0, _INTMASK);
87 airqmask = probe_irq_on();
88 outb(NORXflag, _INTMASK);
89 udelay(1);
90 outb(0, _INTMASK);
91 dev->irq = probe_irq_off(airqmask);
92
93 if ((int)dev->irq <= 0) {
94 BUGMSG(D_INIT_REASONS, "Autoprobe IRQ failed first time\n");
95 airqmask = probe_irq_on();
96 outb(NORXflag, _INTMASK);
97 udelay(5);
98 outb(0, _INTMASK);
99 dev->irq = probe_irq_off(airqmask);
100 if ((int)dev->irq <= 0) {
101 BUGMSG(D_NORMAL, "Autoprobe IRQ failed.\n");
102 err = -ENODEV;
103 goto out;
104 }
105 }
106 }
107
108 lp->card_name = "ISA COM20020";
109 if ((err = com20020_found(dev, 0)) != 0)
110 goto out;
111
112 return 0;
113
114 out:
115 release_region(ioaddr, ARCNET_TOTAL_SIZE);
116 return err;
117 }
118
119 static int node = 0;
120 static int io = 0x0; /* <--- EDIT THESE LINES FOR YOUR CONFIGURATION */
121 static int irq = 0; /* or use the insmod io= irq= shmem= options */
122 static char device[9]; /* use eg. device="arc1" to change name */
123 static int timeout = 3;
124 static int backplane = 0;
125 static int clockp = 0;
126 static int clockm = 0;
127
128 module_param(node, int, 0);
129 module_param(io, int, 0);
130 module_param(irq, int, 0);
131 module_param_string(device, device, sizeof(device), 0);
132 module_param(timeout, int, 0);
133 module_param(backplane, int, 0);
134 module_param(clockp, int, 0);
135 module_param(clockm, int, 0);
136
137 MODULE_LICENSE("GPL");
138
139 static struct net_device *my_dev;
140
com20020_init(void)141 static int __init com20020_init(void)
142 {
143 struct net_device *dev;
144 struct arcnet_local *lp;
145
146 dev = alloc_arcdev(device);
147 if (!dev)
148 return -ENOMEM;
149
150 if (node && node != 0xff)
151 dev->dev_addr[0] = node;
152
153 dev->netdev_ops = &com20020_netdev_ops;
154
155 lp = netdev_priv(dev);
156 lp->backplane = backplane;
157 lp->clockp = clockp & 7;
158 lp->clockm = clockm & 3;
159 lp->timeout = timeout & 3;
160 lp->hw.owner = THIS_MODULE;
161
162 dev->base_addr = io;
163 dev->irq = irq;
164
165 if (dev->irq == 2)
166 dev->irq = 9;
167
168 if (com20020isa_probe(dev)) {
169 free_netdev(dev);
170 return -EIO;
171 }
172
173 my_dev = dev;
174 return 0;
175 }
176
com20020_exit(void)177 static void __exit com20020_exit(void)
178 {
179 unregister_netdev(my_dev);
180 free_irq(my_dev->irq, my_dev);
181 release_region(my_dev->base_addr, ARCNET_TOTAL_SIZE);
182 free_netdev(my_dev);
183 }
184
185 #ifndef MODULE
com20020isa_setup(char * s)186 static int __init com20020isa_setup(char *s)
187 {
188 int ints[8];
189
190 s = get_options(s, 8, ints);
191 if (!ints[0])
192 return 1;
193
194 switch (ints[0]) {
195 default: /* ERROR */
196 printk("com90xx: Too many arguments.\n");
197 case 6: /* Timeout */
198 timeout = ints[6];
199 case 5: /* CKP value */
200 clockp = ints[5];
201 case 4: /* Backplane flag */
202 backplane = ints[4];
203 case 3: /* Node ID */
204 node = ints[3];
205 case 2: /* IRQ */
206 irq = ints[2];
207 case 1: /* IO address */
208 io = ints[1];
209 }
210 if (*s)
211 snprintf(device, sizeof(device), "%s", s);
212 return 1;
213 }
214
215 __setup("com20020=", com20020isa_setup);
216
217 #endif /* MODULE */
218
219 module_init(com20020_init)
220 module_exit(com20020_exit)
221