Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Linux ARCnet driver - COM20020 chipset support | |
cb334648 | 3 | * |
1da177e4 LT |
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 | */ | |
05a24b23 JP |
28 | |
29 | #define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt | |
30 | ||
1da177e4 LT |
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> | |
1da177e4 LT |
36 | #include <linux/errno.h> |
37 | #include <linux/delay.h> | |
38 | #include <linux/netdevice.h> | |
39 | #include <linux/init.h> | |
a6b7a407 | 40 | #include <linux/interrupt.h> |
1da177e4 | 41 | #include <linux/bootmem.h> |
5e7ef913 | 42 | #include <linux/io.h> |
1da177e4 | 43 | |
26c6d281 JP |
44 | #include "arcdevice.h" |
45 | #include "com20020.h" | |
46 | ||
f2f0a16b | 47 | /* We cannot (yet) probe for an IO mapped card, although we can check that |
1da177e4 LT |
48 | * it's where we were told it was, and even do autoirq. |
49 | */ | |
50 | static int __init com20020isa_probe(struct net_device *dev) | |
51 | { | |
52 | int ioaddr; | |
53 | unsigned long airqmask; | |
454d7c9b | 54 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
55 | int err; |
56 | ||
72aeea48 | 57 | if (BUGLVL(D_NORMAL)) |
05a24b23 | 58 | pr_info("%s\n", "COM20020 ISA support (by David Woodhouse et al.)"); |
1da177e4 LT |
59 | |
60 | ioaddr = dev->base_addr; | |
61 | if (!ioaddr) { | |
a34c0932 | 62 | arc_printk(D_NORMAL, dev, "No autoprobe (yet) for IO mapped cards; you must specify the base address!\n"); |
1da177e4 LT |
63 | return -ENODEV; |
64 | } | |
65 | if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) { | |
a34c0932 JP |
66 | arc_printk(D_NORMAL, dev, "IO region %xh-%xh already allocated.\n", |
67 | ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1); | |
1da177e4 LT |
68 | return -ENXIO; |
69 | } | |
0fec6513 | 70 | if (arcnet_inb(ioaddr, COM20020_REG_R_STATUS) == 0xFF) { |
a34c0932 | 71 | arc_printk(D_NORMAL, dev, "IO address %x empty\n", ioaddr); |
1da177e4 LT |
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 | */ | |
a34c0932 | 85 | arc_printk(D_INIT_REASONS, dev, "intmask was %02Xh\n", |
0fec6513 JP |
86 | arcnet_inb(ioaddr, COM20020_REG_R_STATUS)); |
87 | arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK); | |
1da177e4 | 88 | airqmask = probe_irq_on(); |
0fec6513 | 89 | arcnet_outb(NORXflag, ioaddr, COM20020_REG_W_INTMASK); |
1da177e4 | 90 | udelay(1); |
0fec6513 | 91 | arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK); |
1da177e4 LT |
92 | dev->irq = probe_irq_off(airqmask); |
93 | ||
0a6efc78 | 94 | if ((int)dev->irq <= 0) { |
a34c0932 | 95 | arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed first time\n"); |
1da177e4 | 96 | airqmask = probe_irq_on(); |
0fec6513 | 97 | arcnet_outb(NORXflag, ioaddr, COM20020_REG_W_INTMASK); |
1da177e4 | 98 | udelay(5); |
0fec6513 | 99 | arcnet_outb(0, ioaddr, COM20020_REG_W_INTMASK); |
1da177e4 | 100 | dev->irq = probe_irq_off(airqmask); |
0a6efc78 | 101 | if ((int)dev->irq <= 0) { |
a34c0932 | 102 | arc_printk(D_NORMAL, dev, "Autoprobe IRQ failed.\n"); |
1da177e4 LT |
103 | err = -ENODEV; |
104 | goto out; | |
105 | } | |
106 | } | |
107 | } | |
108 | ||
109 | lp->card_name = "ISA COM20020"; | |
97464edd JP |
110 | |
111 | err = com20020_found(dev, 0); | |
112 | if (err != 0) | |
1da177e4 LT |
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(io, int, 0); | |
133 | module_param(irq, int, 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 | ||
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 | ||
a1799af4 SH |
156 | dev->netdev_ops = &com20020_netdev_ops; |
157 | ||
454d7c9b | 158 | lp = netdev_priv(dev); |
1da177e4 LT |
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 | ||
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 | |
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 */ | |
05a24b23 | 199 | pr_info("Too many arguments\n"); |
1da177e4 LT |
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) |