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/memblock.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 | */ |
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, shared: 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 | |
144 | static int __init com20020_init(void) |
145 | { |
146 | struct net_device *dev; |
147 | struct arcnet_local *lp; |
148 | |
149 | dev = alloc_arcdev(name: device); |
150 | if (!dev) |
151 | return -ENOMEM; |
152 | |
153 | if (node && node != 0xff) |
154 | arcnet_set_addr(dev, addr: 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_arcdev(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(dev: my_dev); |
183 | free_irq(my_dev->irq, my_dev); |
184 | release_region(my_dev->base_addr, ARCNET_TOTAL_SIZE); |
185 | free_arcdev(dev: 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(str: s, nints: 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 | fallthrough; |
201 | case 6: /* Timeout */ |
202 | timeout = ints[6]; |
203 | fallthrough; |
204 | case 5: /* CKP value */ |
205 | clockp = ints[5]; |
206 | fallthrough; |
207 | case 4: /* Backplane flag */ |
208 | backplane = ints[4]; |
209 | fallthrough; |
210 | case 3: /* Node ID */ |
211 | node = ints[3]; |
212 | fallthrough; |
213 | case 2: /* IRQ */ |
214 | irq = ints[2]; |
215 | fallthrough; |
216 | case 1: /* IO address */ |
217 | io = ints[1]; |
218 | } |
219 | if (*s) |
220 | snprintf(buf: device, size: sizeof(device), fmt: "%s" , s); |
221 | return 1; |
222 | } |
223 | |
224 | __setup("com20020=" , com20020isa_setup); |
225 | |
226 | #endif /* MODULE */ |
227 | |
228 | module_init(com20020_init) |
229 | module_exit(com20020_exit) |
230 | |