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
29 #define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
30
31 #include <linux/module.h>
32 #include <linux/moduleparam.h>
33 #include <linux/kernel.h>
34 #include <linux/types.h>
35 #include <linux/ioport.h>
36 #include <linux/errno.h>
37 #include <linux/delay.h>
38 #include <linux/netdevice.h>
39 #include <linux/init.h>
40 #include <linux/interrupt.h>
41 #include <linux/bootmem.h>
42 #include <linux/io.h>
43
44 #include "arcdevice.h"
45 #include "com20020.h"
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 if (BUGLVL(D_NORMAL))
58 pr_info("%s\n", "COM20020 ISA support (by David Woodhouse et al.)");
59
60 ioaddr = dev->base_addr;
61 if (!ioaddr) {
62 arc_printk(D_NORMAL, dev, "No autoprobe (yet) for IO mapped cards; you must specify the base address!\n");
63 return -ENODEV;
64 }
65 if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) {
66 arc_printk(D_NORMAL, dev, "IO region %xh-%xh already allocated.\n",
67 ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
68 return -ENXIO;
69 }
70 if (arcnet_inb(ioaddr, COM20020_REG_R_STATUS) == 0xFF) {
71 arc_printk(D_NORMAL, dev, "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 arc_printk(D_INIT_REASONS, dev, "intmask was %02Xh\n",
86 arcnet_inb(ioaddr, COM20020_REG_R_STATUS));
87 arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);
88 airqmask = probe_irq_on();
89 arcnet_outb(NORXflag, ioaddr, COM20020_REG_W_INTMASK);
90 udelay(1);
91 arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);
92 dev->irq = probe_irq_off(airqmask);
93
94 if ((int)dev->irq <= 0) {
95 arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed first time\n");
96 airqmask = probe_irq_on();
97 arcnet_outb(NORXflag, ioaddr, COM20020_REG_W_INTMASK);
98 udelay(5);
99 arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK);
100 dev->irq = probe_irq_off(airqmask);
101 if ((int)dev->irq <= 0) {
102 arc_printk(D_NORMAL, dev, "Autoprobe IRQ failed.\n");
103 err = -ENODEV;
104 goto out;
105 }
106 }
107 }
108
109 lp->card_name = "ISA COM20020";
110
111 err = com20020_found(dev, 0);
112 if (err != 0)
113 goto out;
114
115 return 0;
116
117 out:
118 release_region(ioaddr, ARCNET_TOTAL_SIZE);
119 return err;
120 }
121
122 static int node = 0;
123 static int io = 0x0; /* <--- EDIT THESE LINES FOR YOUR CONFIGURATION */
124 static int irq = 0; /* or use the insmod io= irq= shmem= options */
125 static char device[9]; /* use eg. device="arc1" to change name */
126 static int timeout = 3;
127 static int backplane = 0;
128 static int clockp = 0;
129 static int clockm = 0;
130
131 module_param(node, int, 0);
132 module_param_hw(io, int, ioport, 0);
133 module_param_hw(irq, int, irq, 0);
134 module_param_string(device, device, sizeof(device), 0);
135 module_param(timeout, int, 0);
136 module_param(backplane, int, 0);
137 module_param(clockp, int, 0);
138 module_param(clockm, int, 0);
139
140 MODULE_LICENSE("GPL");
141
142 static struct net_device *my_dev;
143
com20020_init(void)144 static int __init com20020_init(void)
145 {
146 struct net_device *dev;
147 struct arcnet_local *lp;
148
149 dev = alloc_arcdev(device);
150 if (!dev)
151 return -ENOMEM;
152
153 if (node && node != 0xff)
154 dev->dev_addr[0] = node;
155
156 dev->netdev_ops = &com20020_netdev_ops;
157
158 lp = netdev_priv(dev);
159 lp->backplane = backplane;
160 lp->clockp = clockp & 7;
161 lp->clockm = clockm & 3;
162 lp->timeout = timeout & 3;
163 lp->hw.owner = THIS_MODULE;
164
165 dev->base_addr = io;
166 dev->irq = irq;
167
168 if (dev->irq == 2)
169 dev->irq = 9;
170
171 if (com20020isa_probe(dev)) {
172 free_netdev(dev);
173 return -EIO;
174 }
175
176 my_dev = dev;
177 return 0;
178 }
179
com20020_exit(void)180 static void __exit com20020_exit(void)
181 {
182 unregister_netdev(my_dev);
183 free_irq(my_dev->irq, my_dev);
184 release_region(my_dev->base_addr, ARCNET_TOTAL_SIZE);
185 free_netdev(my_dev);
186 }
187
188 #ifndef MODULE
com20020isa_setup(char * s)189 static int __init com20020isa_setup(char *s)
190 {
191 int ints[8];
192
193 s = get_options(s, 8, ints);
194 if (!ints[0])
195 return 1;
196
197 switch (ints[0]) {
198 default: /* ERROR */
199 pr_info("Too many arguments\n");
200 case 6: /* Timeout */
201 timeout = ints[6];
202 case 5: /* CKP value */
203 clockp = ints[5];
204 case 4: /* Backplane flag */
205 backplane = ints[4];
206 case 3: /* Node ID */
207 node = ints[3];
208 case 2: /* IRQ */
209 irq = ints[2];
210 case 1: /* IO address */
211 io = ints[1];
212 }
213 if (*s)
214 snprintf(device, sizeof(device), "%s", s);
215 return 1;
216 }
217
218 __setup("com20020=", com20020isa_setup);
219
220 #endif /* MODULE */
221
222 module_init(com20020_init)
223 module_exit(com20020_exit)
224
