1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
|
/*
* Linux ARCnet driver - COM90xx chipset (IO-mapped buffers)
*
* Written 1997 by David Woodhouse.
* Written 1994-1999 by Avery Pennarun.
* Written 1999-2000 by Martin Mares <mj@ucw.cz>.
* Derived from skeleton.c by Donald Becker.
*
* Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
* for sponsoring the further development of this driver.
*
* **********************
*
* The original copyright of skeleton.c was as follows:
*
* skeleton.c Written 1993 by Donald Becker.
* Copyright 1993 United States Government as represented by the
* Director, National Security Agency. This software may only be used
* and distributed according to the terms of the GNU General Public License as
* modified by SRC, incorporated herein by reference.
*
* **********************
*
* For more details, see drivers/net/arcnet.c
*
* **********************
*/
#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/bootmem.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include "arcdevice.h"
/* Internal function declarations */
static int com90io_found(struct net_device *dev);
static void com90io_command(struct net_device *dev, int command);
static int com90io_status(struct net_device *dev);
static void com90io_setmask(struct net_device *dev, int mask);
static int com90io_reset(struct net_device *dev, int really_reset);
static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
void *buf, int count);
static void com90io_copy_from_card(struct net_device *dev, int bufnum,
int offset, void *buf, int count);
/* Handy defines for ARCnet specific stuff */
/* The number of low I/O ports used by the card. */
#define ARCNET_TOTAL_SIZE 16
/* COM 9026 controller chip --> ARCnet register addresses */
#define _INTMASK (ioaddr + 0) /* writable */
#define _STATUS (ioaddr + 0) /* readable */
#define _COMMAND (ioaddr + 1) /* writable, returns random vals on read (?) */
#define _RESET (ioaddr + 8) /* software reset (on read) */
#define _MEMDATA (ioaddr + 12) /* Data port for IO-mapped memory */
#define _ADDR_HI (ioaddr + 15) /* Control registers for said */
#define _ADDR_LO (ioaddr + 14)
#define _CONFIG (ioaddr + 2) /* Configuration register */
#undef ASTATUS
#undef ACOMMAND
#undef AINTMASK
#define ASTATUS() inb(_STATUS)
#define ACOMMAND(cmd) outb((cmd), _COMMAND)
#define AINTMASK(msk) outb((msk), _INTMASK)
#define SETCONF() outb((lp->config), _CONFIG)
/****************************************************************************
* *
* IO-mapped operation routines *
* *
****************************************************************************/
#undef ONE_AT_A_TIME_TX
#undef ONE_AT_A_TIME_RX
static u_char get_buffer_byte(struct net_device *dev, unsigned offset)
{
int ioaddr = dev->base_addr;
outb(offset >> 8, _ADDR_HI);
outb(offset & 0xff, _ADDR_LO);
return inb(_MEMDATA);
}
#ifdef ONE_AT_A_TIME_TX
static void put_buffer_byte(struct net_device *dev, unsigned offset,
u_char datum)
{
int ioaddr = dev->base_addr;
outb(offset >> 8, _ADDR_HI);
outb(offset & 0xff, _ADDR_LO);
outb(datum, _MEMDATA);
}
#endif
static void get_whole_buffer(struct net_device *dev, unsigned offset,
unsigned length, char *dest)
{
int ioaddr = dev->base_addr;
outb((offset >> 8) | AUTOINCflag, _ADDR_HI);
outb(offset & 0xff, _ADDR_LO);
while (length--)
#ifdef ONE_AT_A_TIME_RX
*(dest++) = get_buffer_byte(dev, offset++);
#else
*(dest++) = inb(_MEMDATA);
#endif
}
static void put_whole_buffer(struct net_device *dev, unsigned offset,
unsigned length, char *dest)
{
int ioaddr = dev->base_addr;
outb((offset >> 8) | AUTOINCflag, _ADDR_HI);
outb(offset & 0xff, _ADDR_LO);
while (length--)
#ifdef ONE_AT_A_TIME_TX
put_buffer_byte(dev, offset++, *(dest++));
#else
outb(*(dest++), _MEMDATA);
#endif
}
/* We cannot probe for an IO mapped card either, although we can check that
* it's where we were told it was, and even autoirq
*/
static int __init com90io_probe(struct net_device *dev)
{
int ioaddr = dev->base_addr, status;
unsigned long airqmask;
if (BUGLVL(D_NORMAL)) {
pr_info("%s\n", "COM90xx IO-mapped mode support (by David Woodhouse et el.)");
pr_info("E-mail me if you actually test this driver, please!\n");
}
if (!ioaddr) {
arc_printk(D_NORMAL, dev, "No autoprobe for IO mapped cards; you must specify the base address!\n");
return -ENODEV;
}
if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "com90io probe")) {
arc_printk(D_INIT_REASONS, dev, "IO request_region %x-%x failed\n",
ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
return -ENXIO;
}
if (ASTATUS() == 0xFF) {
arc_printk(D_INIT_REASONS, dev, "IO address %x empty\n",
ioaddr);
goto err_out;
}
inb(_RESET);
mdelay(RESETtime);
status = ASTATUS();
if ((status & 0x9D) != (NORXflag | RECONflag | TXFREEflag | RESETflag)) {
arc_printk(D_INIT_REASONS, dev, "Status invalid (%Xh)\n",
status);
goto err_out;
}
arc_printk(D_INIT_REASONS, dev, "Status after reset: %X\n", status);
ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear);
arc_printk(D_INIT_REASONS, dev, "Status after reset acknowledged: %X\n",
status);
status = ASTATUS();
if (status & RESETflag) {
arc_printk(D_INIT_REASONS, dev, "Eternal reset (status=%Xh)\n",
status);
goto err_out;
}
outb((0x16 | IOMAPflag) & ~ENABLE16flag, _CONFIG);
/* Read first loc'n of memory */
outb(AUTOINCflag, _ADDR_HI);
outb(0, _ADDR_LO);
status = inb(_MEMDATA);
if (status != 0xd1) {
arc_printk(D_INIT_REASONS, dev, "Signature byte not found (%Xh instead).\n",
status);
goto err_out;
}
if (!dev->irq) {
/* if we do this, we're sure to get an IRQ since the
* card has just reset and the NORXflag is on until
* we tell it to start receiving.
*/
airqmask = probe_irq_on();
outb(NORXflag, _INTMASK);
udelay(1);
outb(0, _INTMASK);
dev->irq = probe_irq_off(airqmask);
if ((int)dev->irq <= 0) {
arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed\n");
goto err_out;
}
}
release_region(ioaddr, ARCNET_TOTAL_SIZE); /* end of probing */
return com90io_found(dev);
err_out:
release_region(ioaddr, ARCNET_TOTAL_SIZE);
return -ENODEV;
}
/* Set up the struct net_device associated with this card. Called after
* probing succeeds.
*/
static int __init com90io_found(struct net_device *dev)
{
struct arcnet_local *lp;
int ioaddr = dev->base_addr;
int err;
/* Reserve the irq */
if (request_irq(dev->irq, arcnet_interrupt, 0,
"arcnet (COM90xx-IO)", dev)) {
arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
return -ENODEV;
}
/* Reserve the I/O region */
if (!request_region(dev->base_addr, ARCNET_TOTAL_SIZE,
"arcnet (COM90xx-IO)")) {
free_irq(dev->irq, dev);
return -EBUSY;
}
lp = netdev_priv(dev);
lp->card_name = "COM90xx I/O";
lp->hw.command = com90io_command;
lp->hw.status = com90io_status;
lp->hw.intmask = com90io_setmask;
lp->hw.reset = com90io_reset;
lp->hw.owner = THIS_MODULE;
lp->hw.copy_to_card = com90io_copy_to_card;
lp->hw.copy_from_card = com90io_copy_from_card;
lp->config = (0x16 | IOMAPflag) & ~ENABLE16flag;
SETCONF();
/* get and check the station ID from offset 1 in shmem */
dev->dev_addr[0] = get_buffer_byte(dev, 1);
err = register_netdev(dev);
if (err) {
outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG);
free_irq(dev->irq, dev);
release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
return err;
}
arc_printk(D_NORMAL, dev, "COM90IO: station %02Xh found at %03lXh, IRQ %d.\n",
dev->dev_addr[0], dev->base_addr, dev->irq);
return 0;
}
/* Do a hardware reset on the card, and set up necessary registers.
*
* This should be called as little as possible, because it disrupts the
* token on the network (causes a RECON) and requires a significant delay.
*
* However, it does make sure the card is in a defined state.
*/
static int com90io_reset(struct net_device *dev, int really_reset)
{
struct arcnet_local *lp = netdev_priv(dev);
short ioaddr = dev->base_addr;
arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
dev->name, ASTATUS());
if (really_reset) {
/* reset the card */
inb(_RESET);
mdelay(RESETtime);
}
/* Set the thing to IO-mapped, 8-bit mode */
lp->config = (0x1C | IOMAPflag) & ~ENABLE16flag;
SETCONF();
ACOMMAND(CFLAGScmd | RESETclear); /* clear flags & end reset */
ACOMMAND(CFLAGScmd | CONFIGclear);
/* verify that the ARCnet signature byte is present */
if (get_buffer_byte(dev, 0) != TESTvalue) {
arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");
return 1;
}
/* enable extended (512-byte) packets */
ACOMMAND(CONFIGcmd | EXTconf);
/* done! return success. */
return 0;
}
static void com90io_command(struct net_device *dev, int cmd)
{
short ioaddr = dev->base_addr;
ACOMMAND(cmd);
}
static int com90io_status(struct net_device *dev)
{
short ioaddr = dev->base_addr;
return ASTATUS();
}
static void com90io_setmask(struct net_device *dev, int mask)
{
short ioaddr = dev->base_addr;
AINTMASK(mask);
}
static void com90io_copy_to_card(struct net_device *dev, int bufnum,
int offset, void *buf, int count)
{
TIME(dev, "put_whole_buffer", count,
put_whole_buffer(dev, bufnum * 512 + offset, count, buf));
}
static void com90io_copy_from_card(struct net_device *dev, int bufnum,
int offset, void *buf, int count)
{
TIME(dev, "get_whole_buffer", count,
get_whole_buffer(dev, bufnum * 512 + offset, count, buf));
}
static int io; /* use the insmod io= irq= shmem= options */
static int irq;
static char device[9]; /* use eg. device=arc1 to change name */
module_param(io, int, 0);
module_param(irq, int, 0);
module_param_string(device, device, sizeof(device), 0);
MODULE_LICENSE("GPL");
#ifndef MODULE
static int __init com90io_setup(char *s)
{
int ints[4];
s = get_options(s, 4, ints);
if (!ints[0])
return 0;
switch (ints[0]) {
default: /* ERROR */
pr_err("Too many arguments\n");
case 2: /* IRQ */
irq = ints[2];
case 1: /* IO address */
io = ints[1];
}
if (*s)
snprintf(device, sizeof(device), "%s", s);
return 1;
}
__setup("com90io=", com90io_setup);
#endif
static struct net_device *my_dev;
static int __init com90io_init(void)
{
struct net_device *dev;
int err;
dev = alloc_arcdev(device);
if (!dev)
return -ENOMEM;
dev->base_addr = io;
dev->irq = irq;
if (dev->irq == 2)
dev->irq = 9;
err = com90io_probe(dev);
if (err) {
free_netdev(dev);
return err;
}
my_dev = dev;
return 0;
}
static void __exit com90io_exit(void)
{
struct net_device *dev = my_dev;
int ioaddr = dev->base_addr;
unregister_netdev(dev);
/* In case the old driver is loaded later,
* set the thing back to MMAP mode
*/
outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG);
free_irq(dev->irq, dev);
release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
free_netdev(dev);
}
module_init(com90io_init)
module_exit(com90io_exit)
|