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/slab.h>
34 #include <linux/errno.h>
35 #include <linux/delay.h>
36 #include <linux/netdevice.h>
37 #include <linux/init.h>
38 #include <linux/bootmem.h>
39 #include <linux/arcdevice.h>
40 #include <linux/com20020.h>
41
42 #include <asm/io.h>
43
44 #define VERSION "arcnet: COM20020 ISA support (by David Woodhouse et al.)\n"
45
46
47 /*
48 * We cannot (yet) probe for an IO mapped card, although we can check that
49 * it's where we were told it was, and even do autoirq.
50 */
51 static int __init com20020isa_probe(struct net_device *dev)
52 {
53 int ioaddr;
54 unsigned long airqmask;
55 struct arcnet_local *lp = netdev_priv(dev);
56 int err;
57
58 BUGLVL(D_NORMAL) printk(VERSION);
59
60 ioaddr = dev->base_addr;
61 if (!ioaddr) {
62 BUGMSG(D_NORMAL, "No autoprobe (yet) for IO mapped cards; you "
63 "must specify the base address!\n");
64 return -ENODEV;
65 }
66 if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) {
67 BUGMSG(D_NORMAL, "IO region %xh-%xh already allocated.\n",
68 ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
69 return -ENXIO;
70 }
71 if (ASTATUS() == 0xFF) {
72 BUGMSG(D_NORMAL, "IO address %x empty\n", ioaddr);
73 err = -ENODEV;
74 goto out;
75 }
76 if (com20020_check(dev)) {
77 err = -ENODEV;
78 goto out;
79 }
80
81 if (!dev->irq) {
82 /* if we do this, we're sure to get an IRQ since the
83 * card has just reset and the NORXflag is on until
84 * we tell it to start receiving.
85 */
86 BUGMSG(D_INIT_REASONS, "intmask was %02Xh\n", inb(_INTMASK));
87 outb(0, _INTMASK);
88 airqmask = probe_irq_on();
89 outb(NORXflag, _INTMASK);
90 udelay(1);
91 outb(0, _INTMASK);
92 dev->irq = probe_irq_off(airqmask);
93
94 if (dev->irq <= 0) {
95 BUGMSG(D_INIT_REASONS, "Autoprobe IRQ failed first time\n");
96 airqmask = probe_irq_on();
97 outb(NORXflag, _INTMASK);
98 udelay(5);
99 outb(0, _INTMASK);
100 dev->irq = probe_irq_off(airqmask);
101 if (dev->irq <= 0) {
102 BUGMSG(D_NORMAL, "Autoprobe IRQ failed.\n");
103 err = -ENODEV;
104 goto out;
105 }
106 }
107 }
108
109 lp->card_name = "ISA COM20020";
110 if ((err = com20020_found(dev, 0)) != 0)
111 goto out;
112
113 return 0;
114
115 out:
116 release_region(ioaddr, ARCNET_TOTAL_SIZE);
117 return err;
118 }
119
120 static int node = 0;
121 static int io = 0x0; /* <--- EDIT THESE LINES FOR YOUR CONFIGURATION */
122 static int irq = 0; /* or use the insmod io= irq= shmem= options */
123 static char device[9]; /* use eg. device="arc1" to change name */
124 static int timeout = 3;
125 static int backplane = 0;
126 static int clockp = 0;
127 static int clockm = 0;
128
129 module_param(node, int, 0);
130 module_param(io, int, 0);
131 module_param(irq, int, 0);
132 module_param_string(device, device, sizeof(device), 0);
133 module_param(timeout, int, 0);
134 module_param(backplane, int, 0);
135 module_param(clockp, int, 0);
136 module_param(clockm, int, 0);
137
138 MODULE_LICENSE("GPL");
139
140 static struct net_device *my_dev;
141
142 static int __init com20020_init(void)
143 {
144 struct net_device *dev;
145 struct arcnet_local *lp;
146
147 dev = alloc_arcdev(device);
148 if (!dev)
149 return -ENOMEM;
150
151 if (node && node != 0xff)
152 dev->dev_addr[0] = node;
153
154 dev->netdev_ops = &com20020_netdev_ops;
155
156 lp = netdev_priv(dev);
157 lp->backplane = backplane;
158 lp->clockp = clockp & 7;
159 lp->clockm = clockm & 3;
160 lp->timeout = timeout & 3;
161 lp->hw.owner = THIS_MODULE;
162
163 dev->base_addr = io;
164 dev->irq = irq;
165
166 if (dev->irq == 2)
167 dev->irq = 9;
168
169 if (com20020isa_probe(dev)) {
170 free_netdev(dev);
171 return -EIO;
172 }
173
174 my_dev = dev;
175 return 0;
176 }
177
178 static void __exit com20020_exit(void)
179 {
180 unregister_netdev(my_dev);
181 free_irq(my_dev->irq, my_dev);
182 release_region(my_dev->base_addr, ARCNET_TOTAL_SIZE);
183 free_netdev(my_dev);
184 }
185
186 #ifndef MODULE
187 static int __init com20020isa_setup(char *s)
188 {
189 int ints[8];
190
191 s = get_options(s, 8, ints);
192 if (!ints[0])
193 return 1;
194
195 switch (ints[0]) {
196 default: /* ERROR */
197 printk("com90xx: Too many arguments.\n");
198 case 6: /* Timeout */
199 timeout = ints[6];
200 case 5: /* CKP value */
201 clockp = ints[5];
202 case 4: /* Backplane flag */
203 backplane = ints[4];
204 case 3: /* Node ID */
205 node = ints[3];
206 case 2: /* IRQ */
207 irq = ints[2];
208 case 1: /* IO address */
209 io = ints[1];
210 }
211 if (*s)
212 snprintf(device, sizeof(device), "%s", s);
213 return 1;
214 }
215
216 __setup("com20020=", com20020isa_setup);
217
218 #endif /* MODULE */
219
220 module_init(com20020_init)
221 module_exit(com20020_exit)
222
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