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1/*
2 * Linux ARCnet driver - COM90xx chipset (IO-mapped buffers)
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/kernel.h>
32#include <linux/module.h>
33#include <linux/moduleparam.h>
34#include <linux/ioport.h>
35#include <linux/delay.h>
36#include <linux/netdevice.h>
37#include <linux/memblock.h>
38#include <linux/init.h>
39#include <linux/interrupt.h>
40#include <linux/io.h>
41
42#include "arcdevice.h"
43#include "com9026.h"
44
45/* Internal function declarations */
46
47static int com90io_found(struct net_device *dev);
48static void com90io_command(struct net_device *dev, int command);
49static int com90io_status(struct net_device *dev);
50static void com90io_setmask(struct net_device *dev, int mask);
51static int com90io_reset(struct net_device *dev, int really_reset);
52static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
53 void *buf, int count);
54static void com90io_copy_from_card(struct net_device *dev, int bufnum,
55 int offset, void *buf, int count);
56
57/* Handy defines for ARCnet specific stuff */
58
59/* The number of low I/O ports used by the card. */
60#define ARCNET_TOTAL_SIZE 16
61
62/****************************************************************************
63 * *
64 * IO-mapped operation routines *
65 * *
66 ****************************************************************************/
67
68#undef ONE_AT_A_TIME_TX
69#undef ONE_AT_A_TIME_RX
70
71static u_char get_buffer_byte(struct net_device *dev, unsigned offset)
72{
73 int ioaddr = dev->base_addr;
74
75 arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI);
76 arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
77
78 return arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
79}
80
81#ifdef ONE_AT_A_TIME_TX
82static void put_buffer_byte(struct net_device *dev, unsigned offset,
83 u_char datum)
84{
85 int ioaddr = dev->base_addr;
86
87 arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI);
88 arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
89
90 arcnet_outb(datum, ioaddr, COM9026_REG_RW_MEMDATA);
91}
92
93#endif
94
95static void get_whole_buffer(struct net_device *dev, unsigned offset,
96 unsigned length, char *dest)
97{
98 int ioaddr = dev->base_addr;
99
100 arcnet_outb((offset >> 8) | AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
101 arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
102
103 while (length--)
104#ifdef ONE_AT_A_TIME_RX
105 *(dest++) = get_buffer_byte(dev, offset++);
106#else
107 *(dest++) = arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
108#endif
109}
110
111static void put_whole_buffer(struct net_device *dev, unsigned offset,
112 unsigned length, char *dest)
113{
114 int ioaddr = dev->base_addr;
115
116 arcnet_outb((offset >> 8) | AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
117 arcnet_outb(offset & 0xff, ioaddr,COM9026_REG_W_ADDR_LO);
118
119 while (length--)
120#ifdef ONE_AT_A_TIME_TX
121 put_buffer_byte(dev, offset++, *(dest++));
122#else
123 arcnet_outb(*(dest++), ioaddr, COM9026_REG_RW_MEMDATA);
124#endif
125}
126
127/* We cannot probe for an IO mapped card either, although we can check that
128 * it's where we were told it was, and even autoirq
129 */
130static int __init com90io_probe(struct net_device *dev)
131{
132 int ioaddr = dev->base_addr, status;
133 unsigned long airqmask;
134
135 if (BUGLVL(D_NORMAL)) {
136 pr_info("%s\n", "COM90xx IO-mapped mode support (by David Woodhouse et el.)");
137 pr_info("E-mail me if you actually test this driver, please!\n");
138 }
139
140 if (!ioaddr) {
141 arc_printk(D_NORMAL, dev, "No autoprobe for IO mapped cards; you must specify the base address!\n");
142 return -ENODEV;
143 }
144 if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "com90io probe")) {
145 arc_printk(D_INIT_REASONS, dev, "IO request_region %x-%x failed\n",
146 ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
147 return -ENXIO;
148 }
149 if (arcnet_inb(ioaddr, COM9026_REG_R_STATUS) == 0xFF) {
150 arc_printk(D_INIT_REASONS, dev, "IO address %x empty\n",
151 ioaddr);
152 goto err_out;
153 }
154 arcnet_inb(ioaddr, COM9026_REG_R_RESET);
155 mdelay(RESETtime);
156
157 status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
158
159 if ((status & 0x9D) != (NORXflag | RECONflag | TXFREEflag | RESETflag)) {
160 arc_printk(D_INIT_REASONS, dev, "Status invalid (%Xh)\n",
161 status);
162 goto err_out;
163 }
164 arc_printk(D_INIT_REASONS, dev, "Status after reset: %X\n", status);
165
166 arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear,
167 ioaddr, COM9026_REG_W_COMMAND);
168
169 arc_printk(D_INIT_REASONS, dev, "Status after reset acknowledged: %X\n",
170 status);
171
172 status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
173
174 if (status & RESETflag) {
175 arc_printk(D_INIT_REASONS, dev, "Eternal reset (status=%Xh)\n",
176 status);
177 goto err_out;
178 }
179 arcnet_outb((0x16 | IOMAPflag) & ~ENABLE16flag,
180 ioaddr, COM9026_REG_RW_CONFIG);
181
182 /* Read first loc'n of memory */
183
184 arcnet_outb(AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
185 arcnet_outb(0, ioaddr, COM9026_REG_W_ADDR_LO);
186
187 status = arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
188 if (status != 0xd1) {
189 arc_printk(D_INIT_REASONS, dev, "Signature byte not found (%Xh instead).\n",
190 status);
191 goto err_out;
192 }
193 if (!dev->irq) {
194 /* if we do this, we're sure to get an IRQ since the
195 * card has just reset and the NORXflag is on until
196 * we tell it to start receiving.
197 */
198
199 airqmask = probe_irq_on();
200 arcnet_outb(NORXflag, ioaddr, COM9026_REG_W_INTMASK);
201 udelay(1);
202 arcnet_outb(0, ioaddr, COM9026_REG_W_INTMASK);
203 dev->irq = probe_irq_off(airqmask);
204
205 if ((int)dev->irq <= 0) {
206 arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed\n");
207 goto err_out;
208 }
209 }
210 release_region(ioaddr, ARCNET_TOTAL_SIZE); /* end of probing */
211 return com90io_found(dev);
212
213err_out:
214 release_region(ioaddr, ARCNET_TOTAL_SIZE);
215 return -ENODEV;
216}
217
218/* Set up the struct net_device associated with this card. Called after
219 * probing succeeds.
220 */
221static int __init com90io_found(struct net_device *dev)
222{
223 struct arcnet_local *lp;
224 int ioaddr = dev->base_addr;
225 int err;
226
227 /* Reserve the irq */
228 if (request_irq(dev->irq, arcnet_interrupt, 0,
229 "arcnet (COM90xx-IO)", dev)) {
230 arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
231 return -ENODEV;
232 }
233 /* Reserve the I/O region */
234 if (!request_region(dev->base_addr, ARCNET_TOTAL_SIZE,
235 "arcnet (COM90xx-IO)")) {
236 free_irq(dev->irq, dev);
237 return -EBUSY;
238 }
239
240 lp = netdev_priv(dev);
241 lp->card_name = "COM90xx I/O";
242 lp->hw.command = com90io_command;
243 lp->hw.status = com90io_status;
244 lp->hw.intmask = com90io_setmask;
245 lp->hw.reset = com90io_reset;
246 lp->hw.owner = THIS_MODULE;
247 lp->hw.copy_to_card = com90io_copy_to_card;
248 lp->hw.copy_from_card = com90io_copy_from_card;
249
250 lp->config = (0x16 | IOMAPflag) & ~ENABLE16flag;
251 arcnet_outb(lp->config, ioaddr, COM9026_REG_RW_CONFIG);
252
253 /* get and check the station ID from offset 1 in shmem */
254
255 arcnet_set_addr(dev, get_buffer_byte(dev, 1));
256
257 err = register_netdev(dev);
258 if (err) {
259 arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) & ~IOMAPflag,
260 ioaddr, COM9026_REG_RW_CONFIG);
261 free_irq(dev->irq, dev);
262 release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
263 return err;
264 }
265
266 arc_printk(D_NORMAL, dev, "COM90IO: station %02Xh found at %03lXh, IRQ %d.\n",
267 dev->dev_addr[0], dev->base_addr, dev->irq);
268
269 return 0;
270}
271
272/* Do a hardware reset on the card, and set up necessary registers.
273 *
274 * This should be called as little as possible, because it disrupts the
275 * token on the network (causes a RECON) and requires a significant delay.
276 *
277 * However, it does make sure the card is in a defined state.
278 */
279static int com90io_reset(struct net_device *dev, int really_reset)
280{
281 struct arcnet_local *lp = netdev_priv(dev);
282 short ioaddr = dev->base_addr;
283
284 arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
285 dev->name, arcnet_inb(ioaddr, COM9026_REG_R_STATUS));
286
287 if (really_reset) {
288 /* reset the card */
289 arcnet_inb(ioaddr, COM9026_REG_R_RESET);
290 mdelay(RESETtime);
291 }
292 /* Set the thing to IO-mapped, 8-bit mode */
293 lp->config = (0x1C | IOMAPflag) & ~ENABLE16flag;
294 arcnet_outb(lp->config, ioaddr, COM9026_REG_RW_CONFIG);
295
296 arcnet_outb(CFLAGScmd | RESETclear, ioaddr, COM9026_REG_W_COMMAND);
297 /* clear flags & end reset */
298 arcnet_outb(CFLAGScmd | CONFIGclear, ioaddr, COM9026_REG_W_COMMAND);
299
300 /* verify that the ARCnet signature byte is present */
301 if (get_buffer_byte(dev, 0) != TESTvalue) {
302 arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");
303 return 1;
304 }
305 /* enable extended (512-byte) packets */
306 arcnet_outb(CONFIGcmd | EXTconf, ioaddr, COM9026_REG_W_COMMAND);
307 /* done! return success. */
308 return 0;
309}
310
311static void com90io_command(struct net_device *dev, int cmd)
312{
313 short ioaddr = dev->base_addr;
314
315 arcnet_outb(cmd, ioaddr, COM9026_REG_W_COMMAND);
316}
317
318static int com90io_status(struct net_device *dev)
319{
320 short ioaddr = dev->base_addr;
321
322 return arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
323}
324
325static void com90io_setmask(struct net_device *dev, int mask)
326{
327 short ioaddr = dev->base_addr;
328
329 arcnet_outb(mask, ioaddr, COM9026_REG_W_INTMASK);
330}
331
332static void com90io_copy_to_card(struct net_device *dev, int bufnum,
333 int offset, void *buf, int count)
334{
335 TIME(dev, "put_whole_buffer", count,
336 put_whole_buffer(dev, bufnum * 512 + offset, count, buf));
337}
338
339static void com90io_copy_from_card(struct net_device *dev, int bufnum,
340 int offset, void *buf, int count)
341{
342 TIME(dev, "get_whole_buffer", count,
343 get_whole_buffer(dev, bufnum * 512 + offset, count, buf));
344}
345
346static int io; /* use the insmod io= irq= shmem= options */
347static int irq;
348static char device[9]; /* use eg. device=arc1 to change name */
349
350module_param_hw(io, int, ioport, 0);
351module_param_hw(irq, int, irq, 0);
352module_param_string(device, device, sizeof(device), 0);
353MODULE_DESCRIPTION("ARCnet COM90xx IO mapped chipset driver");
354MODULE_LICENSE("GPL");
355
356#ifndef MODULE
357static int __init com90io_setup(char *s)
358{
359 int ints[4];
360
361 s = get_options(s, 4, ints);
362 if (!ints[0])
363 return 0;
364 switch (ints[0]) {
365 default: /* ERROR */
366 pr_err("Too many arguments\n");
367 fallthrough;
368 case 2: /* IRQ */
369 irq = ints[2];
370 fallthrough;
371 case 1: /* IO address */
372 io = ints[1];
373 }
374 if (*s)
375 snprintf(device, sizeof(device), "%s", s);
376 return 1;
377}
378__setup("com90io=", com90io_setup);
379#endif
380
381static struct net_device *my_dev;
382
383static int __init com90io_init(void)
384{
385 struct net_device *dev;
386 int err;
387
388 dev = alloc_arcdev(device);
389 if (!dev)
390 return -ENOMEM;
391
392 dev->base_addr = io;
393 dev->irq = irq;
394 if (dev->irq == 2)
395 dev->irq = 9;
396
397 err = com90io_probe(dev);
398
399 if (err) {
400 free_arcdev(dev);
401 return err;
402 }
403
404 my_dev = dev;
405 return 0;
406}
407
408static void __exit com90io_exit(void)
409{
410 struct net_device *dev = my_dev;
411 int ioaddr = dev->base_addr;
412
413 unregister_netdev(dev);
414
415 /* In case the old driver is loaded later,
416 * set the thing back to MMAP mode
417 */
418 arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) & ~IOMAPflag,
419 ioaddr, COM9026_REG_RW_CONFIG);
420
421 free_irq(dev->irq, dev);
422 release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
423 free_arcdev(dev);
424}
425
426module_init(com90io_init)
427module_exit(com90io_exit)
1/*
2 * Linux ARCnet driver - COM90xx chipset (IO-mapped buffers)
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/kernel.h>
32#include <linux/module.h>
33#include <linux/moduleparam.h>
34#include <linux/ioport.h>
35#include <linux/delay.h>
36#include <linux/netdevice.h>
37#include <linux/memblock.h>
38#include <linux/init.h>
39#include <linux/interrupt.h>
40#include <linux/io.h>
41
42#include "arcdevice.h"
43#include "com9026.h"
44
45/* Internal function declarations */
46
47static int com90io_found(struct net_device *dev);
48static void com90io_command(struct net_device *dev, int command);
49static int com90io_status(struct net_device *dev);
50static void com90io_setmask(struct net_device *dev, int mask);
51static int com90io_reset(struct net_device *dev, int really_reset);
52static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
53 void *buf, int count);
54static void com90io_copy_from_card(struct net_device *dev, int bufnum,
55 int offset, void *buf, int count);
56
57/* Handy defines for ARCnet specific stuff */
58
59/* The number of low I/O ports used by the card. */
60#define ARCNET_TOTAL_SIZE 16
61
62/****************************************************************************
63 * *
64 * IO-mapped operation routines *
65 * *
66 ****************************************************************************/
67
68#undef ONE_AT_A_TIME_TX
69#undef ONE_AT_A_TIME_RX
70
71static u_char get_buffer_byte(struct net_device *dev, unsigned offset)
72{
73 int ioaddr = dev->base_addr;
74
75 arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI);
76 arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
77
78 return arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
79}
80
81#ifdef ONE_AT_A_TIME_TX
82static void put_buffer_byte(struct net_device *dev, unsigned offset,
83 u_char datum)
84{
85 int ioaddr = dev->base_addr;
86
87 arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI);
88 arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
89
90 arcnet_outb(datum, ioaddr, COM9026_REG_RW_MEMDATA);
91}
92
93#endif
94
95static void get_whole_buffer(struct net_device *dev, unsigned offset,
96 unsigned length, char *dest)
97{
98 int ioaddr = dev->base_addr;
99
100 arcnet_outb((offset >> 8) | AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
101 arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);
102
103 while (length--)
104#ifdef ONE_AT_A_TIME_RX
105 *(dest++) = get_buffer_byte(dev, offset++);
106#else
107 *(dest++) = arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
108#endif
109}
110
111static void put_whole_buffer(struct net_device *dev, unsigned offset,
112 unsigned length, char *dest)
113{
114 int ioaddr = dev->base_addr;
115
116 arcnet_outb((offset >> 8) | AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
117 arcnet_outb(offset & 0xff, ioaddr,COM9026_REG_W_ADDR_LO);
118
119 while (length--)
120#ifdef ONE_AT_A_TIME_TX
121 put_buffer_byte(dev, offset++, *(dest++));
122#else
123 arcnet_outb(*(dest++), ioaddr, COM9026_REG_RW_MEMDATA);
124#endif
125}
126
127/* We cannot probe for an IO mapped card either, although we can check that
128 * it's where we were told it was, and even autoirq
129 */
130static int __init com90io_probe(struct net_device *dev)
131{
132 int ioaddr = dev->base_addr, status;
133 unsigned long airqmask;
134
135 if (BUGLVL(D_NORMAL)) {
136 pr_info("%s\n", "COM90xx IO-mapped mode support (by David Woodhouse et el.)");
137 pr_info("E-mail me if you actually test this driver, please!\n");
138 }
139
140 if (!ioaddr) {
141 arc_printk(D_NORMAL, dev, "No autoprobe for IO mapped cards; you must specify the base address!\n");
142 return -ENODEV;
143 }
144 if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "com90io probe")) {
145 arc_printk(D_INIT_REASONS, dev, "IO request_region %x-%x failed\n",
146 ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1);
147 return -ENXIO;
148 }
149 if (arcnet_inb(ioaddr, COM9026_REG_R_STATUS) == 0xFF) {
150 arc_printk(D_INIT_REASONS, dev, "IO address %x empty\n",
151 ioaddr);
152 goto err_out;
153 }
154 arcnet_inb(ioaddr, COM9026_REG_R_RESET);
155 mdelay(RESETtime);
156
157 status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
158
159 if ((status & 0x9D) != (NORXflag | RECONflag | TXFREEflag | RESETflag)) {
160 arc_printk(D_INIT_REASONS, dev, "Status invalid (%Xh)\n",
161 status);
162 goto err_out;
163 }
164 arc_printk(D_INIT_REASONS, dev, "Status after reset: %X\n", status);
165
166 arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear,
167 ioaddr, COM9026_REG_W_COMMAND);
168
169 arc_printk(D_INIT_REASONS, dev, "Status after reset acknowledged: %X\n",
170 status);
171
172 status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
173
174 if (status & RESETflag) {
175 arc_printk(D_INIT_REASONS, dev, "Eternal reset (status=%Xh)\n",
176 status);
177 goto err_out;
178 }
179 arcnet_outb((0x16 | IOMAPflag) & ~ENABLE16flag,
180 ioaddr, COM9026_REG_RW_CONFIG);
181
182 /* Read first loc'n of memory */
183
184 arcnet_outb(AUTOINCflag, ioaddr, COM9026_REG_W_ADDR_HI);
185 arcnet_outb(0, ioaddr, COM9026_REG_W_ADDR_LO);
186
187 status = arcnet_inb(ioaddr, COM9026_REG_RW_MEMDATA);
188 if (status != 0xd1) {
189 arc_printk(D_INIT_REASONS, dev, "Signature byte not found (%Xh instead).\n",
190 status);
191 goto err_out;
192 }
193 if (!dev->irq) {
194 /* if we do this, we're sure to get an IRQ since the
195 * card has just reset and the NORXflag is on until
196 * we tell it to start receiving.
197 */
198
199 airqmask = probe_irq_on();
200 arcnet_outb(NORXflag, ioaddr, COM9026_REG_W_INTMASK);
201 udelay(1);
202 arcnet_outb(0, ioaddr, COM9026_REG_W_INTMASK);
203 dev->irq = probe_irq_off(airqmask);
204
205 if ((int)dev->irq <= 0) {
206 arc_printk(D_INIT_REASONS, dev, "Autoprobe IRQ failed\n");
207 goto err_out;
208 }
209 }
210 release_region(ioaddr, ARCNET_TOTAL_SIZE); /* end of probing */
211 return com90io_found(dev);
212
213err_out:
214 release_region(ioaddr, ARCNET_TOTAL_SIZE);
215 return -ENODEV;
216}
217
218/* Set up the struct net_device associated with this card. Called after
219 * probing succeeds.
220 */
221static int __init com90io_found(struct net_device *dev)
222{
223 struct arcnet_local *lp;
224 int ioaddr = dev->base_addr;
225 int err;
226
227 /* Reserve the irq */
228 if (request_irq(dev->irq, arcnet_interrupt, 0,
229 "arcnet (COM90xx-IO)", dev)) {
230 arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq);
231 return -ENODEV;
232 }
233 /* Reserve the I/O region */
234 if (!request_region(dev->base_addr, ARCNET_TOTAL_SIZE,
235 "arcnet (COM90xx-IO)")) {
236 free_irq(dev->irq, dev);
237 return -EBUSY;
238 }
239
240 lp = netdev_priv(dev);
241 lp->card_name = "COM90xx I/O";
242 lp->hw.command = com90io_command;
243 lp->hw.status = com90io_status;
244 lp->hw.intmask = com90io_setmask;
245 lp->hw.reset = com90io_reset;
246 lp->hw.owner = THIS_MODULE;
247 lp->hw.copy_to_card = com90io_copy_to_card;
248 lp->hw.copy_from_card = com90io_copy_from_card;
249
250 lp->config = (0x16 | IOMAPflag) & ~ENABLE16flag;
251 arcnet_outb(lp->config, ioaddr, COM9026_REG_RW_CONFIG);
252
253 /* get and check the station ID from offset 1 in shmem */
254
255 dev->dev_addr[0] = get_buffer_byte(dev, 1);
256
257 err = register_netdev(dev);
258 if (err) {
259 arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) & ~IOMAPflag,
260 ioaddr, COM9026_REG_RW_CONFIG);
261 free_irq(dev->irq, dev);
262 release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
263 return err;
264 }
265
266 arc_printk(D_NORMAL, dev, "COM90IO: station %02Xh found at %03lXh, IRQ %d.\n",
267 dev->dev_addr[0], dev->base_addr, dev->irq);
268
269 return 0;
270}
271
272/* Do a hardware reset on the card, and set up necessary registers.
273 *
274 * This should be called as little as possible, because it disrupts the
275 * token on the network (causes a RECON) and requires a significant delay.
276 *
277 * However, it does make sure the card is in a defined state.
278 */
279static int com90io_reset(struct net_device *dev, int really_reset)
280{
281 struct arcnet_local *lp = netdev_priv(dev);
282 short ioaddr = dev->base_addr;
283
284 arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n",
285 dev->name, arcnet_inb(ioaddr, COM9026_REG_R_STATUS));
286
287 if (really_reset) {
288 /* reset the card */
289 arcnet_inb(ioaddr, COM9026_REG_R_RESET);
290 mdelay(RESETtime);
291 }
292 /* Set the thing to IO-mapped, 8-bit mode */
293 lp->config = (0x1C | IOMAPflag) & ~ENABLE16flag;
294 arcnet_outb(lp->config, ioaddr, COM9026_REG_RW_CONFIG);
295
296 arcnet_outb(CFLAGScmd | RESETclear, ioaddr, COM9026_REG_W_COMMAND);
297 /* clear flags & end reset */
298 arcnet_outb(CFLAGScmd | CONFIGclear, ioaddr, COM9026_REG_W_COMMAND);
299
300 /* verify that the ARCnet signature byte is present */
301 if (get_buffer_byte(dev, 0) != TESTvalue) {
302 arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");
303 return 1;
304 }
305 /* enable extended (512-byte) packets */
306 arcnet_outb(CONFIGcmd | EXTconf, ioaddr, COM9026_REG_W_COMMAND);
307 /* done! return success. */
308 return 0;
309}
310
311static void com90io_command(struct net_device *dev, int cmd)
312{
313 short ioaddr = dev->base_addr;
314
315 arcnet_outb(cmd, ioaddr, COM9026_REG_W_COMMAND);
316}
317
318static int com90io_status(struct net_device *dev)
319{
320 short ioaddr = dev->base_addr;
321
322 return arcnet_inb(ioaddr, COM9026_REG_R_STATUS);
323}
324
325static void com90io_setmask(struct net_device *dev, int mask)
326{
327 short ioaddr = dev->base_addr;
328
329 arcnet_outb(mask, ioaddr, COM9026_REG_W_INTMASK);
330}
331
332static void com90io_copy_to_card(struct net_device *dev, int bufnum,
333 int offset, void *buf, int count)
334{
335 TIME(dev, "put_whole_buffer", count,
336 put_whole_buffer(dev, bufnum * 512 + offset, count, buf));
337}
338
339static void com90io_copy_from_card(struct net_device *dev, int bufnum,
340 int offset, void *buf, int count)
341{
342 TIME(dev, "get_whole_buffer", count,
343 get_whole_buffer(dev, bufnum * 512 + offset, count, buf));
344}
345
346static int io; /* use the insmod io= irq= shmem= options */
347static int irq;
348static char device[9]; /* use eg. device=arc1 to change name */
349
350module_param_hw(io, int, ioport, 0);
351module_param_hw(irq, int, irq, 0);
352module_param_string(device, device, sizeof(device), 0);
353MODULE_LICENSE("GPL");
354
355#ifndef MODULE
356static int __init com90io_setup(char *s)
357{
358 int ints[4];
359
360 s = get_options(s, 4, ints);
361 if (!ints[0])
362 return 0;
363 switch (ints[0]) {
364 default: /* ERROR */
365 pr_err("Too many arguments\n");
366 fallthrough;
367 case 2: /* IRQ */
368 irq = ints[2];
369 fallthrough;
370 case 1: /* IO address */
371 io = ints[1];
372 }
373 if (*s)
374 snprintf(device, sizeof(device), "%s", s);
375 return 1;
376}
377__setup("com90io=", com90io_setup);
378#endif
379
380static struct net_device *my_dev;
381
382static int __init com90io_init(void)
383{
384 struct net_device *dev;
385 int err;
386
387 dev = alloc_arcdev(device);
388 if (!dev)
389 return -ENOMEM;
390
391 dev->base_addr = io;
392 dev->irq = irq;
393 if (dev->irq == 2)
394 dev->irq = 9;
395
396 err = com90io_probe(dev);
397
398 if (err) {
399 free_arcdev(dev);
400 return err;
401 }
402
403 my_dev = dev;
404 return 0;
405}
406
407static void __exit com90io_exit(void)
408{
409 struct net_device *dev = my_dev;
410 int ioaddr = dev->base_addr;
411
412 unregister_netdev(dev);
413
414 /* In case the old driver is loaded later,
415 * set the thing back to MMAP mode
416 */
417 arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) & ~IOMAPflag,
418 ioaddr, COM9026_REG_RW_CONFIG);
419
420 free_irq(dev->irq, dev);
421 release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
422 free_arcdev(dev);
423}
424
425module_init(com90io_init)
426module_exit(com90io_exit)