Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | #include <linux/kernel.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/moduleparam.h> | |
31 | #include <linux/ioport.h> | |
1da177e4 LT |
32 | #include <linux/delay.h> |
33 | #include <linux/netdevice.h> | |
34 | #include <linux/bootmem.h> | |
35 | #include <linux/init.h> | |
36 | #include <asm/io.h> | |
37 | #include <linux/arcdevice.h> | |
38 | ||
39 | ||
40 | #define VERSION "arcnet: COM90xx IO-mapped mode support (by David Woodhouse et el.)\n" | |
41 | ||
42 | ||
43 | /* Internal function declarations */ | |
44 | ||
45 | static int com90io_found(struct net_device *dev); | |
46 | static void com90io_command(struct net_device *dev, int command); | |
47 | static int com90io_status(struct net_device *dev); | |
48 | static void com90io_setmask(struct net_device *dev, int mask); | |
49 | static int com90io_reset(struct net_device *dev, int really_reset); | |
50 | static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset, | |
51 | void *buf, int count); | |
52 | static void com90io_copy_from_card(struct net_device *dev, int bufnum, int offset, | |
53 | void *buf, int count); | |
54 | ||
55 | ||
56 | /* Handy defines for ARCnet specific stuff */ | |
57 | ||
58 | /* The number of low I/O ports used by the card. */ | |
59 | #define ARCNET_TOTAL_SIZE 16 | |
60 | ||
61 | /* COM 9026 controller chip --> ARCnet register addresses */ | |
62 | #define _INTMASK (ioaddr+0) /* writable */ | |
63 | #define _STATUS (ioaddr+0) /* readable */ | |
64 | #define _COMMAND (ioaddr+1) /* writable, returns random vals on read (?) */ | |
65 | #define _RESET (ioaddr+8) /* software reset (on read) */ | |
66 | #define _MEMDATA (ioaddr+12) /* Data port for IO-mapped memory */ | |
67 | #define _ADDR_HI (ioaddr+15) /* Control registers for said */ | |
68 | #define _ADDR_LO (ioaddr+14) | |
69 | #define _CONFIG (ioaddr+2) /* Configuration register */ | |
70 | ||
71 | #undef ASTATUS | |
72 | #undef ACOMMAND | |
73 | #undef AINTMASK | |
74 | ||
75 | #define ASTATUS() inb(_STATUS) | |
76 | #define ACOMMAND(cmd) outb((cmd),_COMMAND) | |
77 | #define AINTMASK(msk) outb((msk),_INTMASK) | |
78 | #define SETCONF() outb((lp->config),_CONFIG) | |
79 | ||
80 | ||
81 | /**************************************************************************** | |
82 | * * | |
83 | * IO-mapped operation routines * | |
84 | * * | |
85 | ****************************************************************************/ | |
86 | ||
87 | #undef ONE_AT_A_TIME_TX | |
88 | #undef ONE_AT_A_TIME_RX | |
89 | ||
90 | static u_char get_buffer_byte(struct net_device *dev, unsigned offset) | |
91 | { | |
92 | int ioaddr = dev->base_addr; | |
93 | ||
94 | outb(offset >> 8, _ADDR_HI); | |
95 | outb(offset & 0xff, _ADDR_LO); | |
96 | ||
97 | return inb(_MEMDATA); | |
98 | } | |
99 | ||
100 | #ifdef ONE_AT_A_TIME_TX | |
101 | static void put_buffer_byte(struct net_device *dev, unsigned offset, u_char datum) | |
102 | { | |
103 | int ioaddr = dev->base_addr; | |
104 | ||
105 | outb(offset >> 8, _ADDR_HI); | |
106 | outb(offset & 0xff, _ADDR_LO); | |
107 | ||
108 | outb(datum, _MEMDATA); | |
109 | } | |
110 | ||
111 | #endif | |
112 | ||
113 | ||
114 | static void get_whole_buffer(struct net_device *dev, unsigned offset, unsigned length, char *dest) | |
115 | { | |
116 | int ioaddr = dev->base_addr; | |
117 | ||
118 | outb((offset >> 8) | AUTOINCflag, _ADDR_HI); | |
119 | outb(offset & 0xff, _ADDR_LO); | |
120 | ||
121 | while (length--) | |
122 | #ifdef ONE_AT_A_TIME_RX | |
123 | *(dest++) = get_buffer_byte(dev, offset++); | |
124 | #else | |
125 | *(dest++) = inb(_MEMDATA); | |
126 | #endif | |
127 | } | |
128 | ||
129 | static void put_whole_buffer(struct net_device *dev, unsigned offset, unsigned length, char *dest) | |
130 | { | |
131 | int ioaddr = dev->base_addr; | |
132 | ||
133 | outb((offset >> 8) | AUTOINCflag, _ADDR_HI); | |
134 | outb(offset & 0xff, _ADDR_LO); | |
135 | ||
136 | while (length--) | |
137 | #ifdef ONE_AT_A_TIME_TX | |
138 | put_buffer_byte(dev, offset++, *(dest++)); | |
139 | #else | |
140 | outb(*(dest++), _MEMDATA); | |
141 | #endif | |
142 | } | |
143 | ||
144 | /* | |
145 | * We cannot probe for an IO mapped card either, although we can check that | |
146 | * it's where we were told it was, and even autoirq | |
147 | */ | |
148 | static int __init com90io_probe(struct net_device *dev) | |
149 | { | |
150 | int ioaddr = dev->base_addr, status; | |
151 | unsigned long airqmask; | |
152 | ||
153 | BUGLVL(D_NORMAL) printk(VERSION); | |
154 | BUGLVL(D_NORMAL) printk("E-mail me if you actually test this driver, please!\n"); | |
155 | ||
156 | if (!ioaddr) { | |
157 | BUGMSG(D_NORMAL, "No autoprobe for IO mapped cards; you " | |
158 | "must specify the base address!\n"); | |
159 | return -ENODEV; | |
160 | } | |
161 | if (!request_region(ioaddr, ARCNET_TOTAL_SIZE, "com90io probe")) { | |
fb911ee8 | 162 | BUGMSG(D_INIT_REASONS, "IO request_region %x-%x failed.\n", |
1da177e4 LT |
163 | ioaddr, ioaddr + ARCNET_TOTAL_SIZE - 1); |
164 | return -ENXIO; | |
165 | } | |
166 | if (ASTATUS() == 0xFF) { | |
167 | BUGMSG(D_INIT_REASONS, "IO address %x empty\n", ioaddr); | |
168 | goto err_out; | |
169 | } | |
170 | inb(_RESET); | |
171 | mdelay(RESETtime); | |
172 | ||
173 | status = ASTATUS(); | |
174 | ||
175 | if ((status & 0x9D) != (NORXflag | RECONflag | TXFREEflag | RESETflag)) { | |
176 | BUGMSG(D_INIT_REASONS, "Status invalid (%Xh).\n", status); | |
177 | goto err_out; | |
178 | } | |
179 | BUGMSG(D_INIT_REASONS, "Status after reset: %X\n", status); | |
180 | ||
181 | ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear); | |
182 | ||
183 | BUGMSG(D_INIT_REASONS, "Status after reset acknowledged: %X\n", status); | |
184 | ||
185 | status = ASTATUS(); | |
186 | ||
187 | if (status & RESETflag) { | |
188 | BUGMSG(D_INIT_REASONS, "Eternal reset (status=%Xh)\n", status); | |
189 | goto err_out; | |
190 | } | |
191 | outb((0x16 | IOMAPflag) & ~ENABLE16flag, _CONFIG); | |
192 | ||
193 | /* Read first loc'n of memory */ | |
194 | ||
195 | outb(AUTOINCflag, _ADDR_HI); | |
196 | outb(0, _ADDR_LO); | |
197 | ||
198 | if ((status = inb(_MEMDATA)) != 0xd1) { | |
199 | BUGMSG(D_INIT_REASONS, "Signature byte not found" | |
200 | " (%Xh instead).\n", status); | |
201 | goto err_out; | |
202 | } | |
203 | if (!dev->irq) { | |
204 | /* | |
205 | * if we do this, we're sure to get an IRQ since the | |
206 | * card has just reset and the NORXflag is on until | |
207 | * we tell it to start receiving. | |
208 | */ | |
209 | ||
210 | airqmask = probe_irq_on(); | |
211 | outb(NORXflag, _INTMASK); | |
212 | udelay(1); | |
213 | outb(0, _INTMASK); | |
214 | dev->irq = probe_irq_off(airqmask); | |
215 | ||
0a6efc78 | 216 | if ((int)dev->irq <= 0) { |
1da177e4 LT |
217 | BUGMSG(D_INIT_REASONS, "Autoprobe IRQ failed\n"); |
218 | goto err_out; | |
219 | } | |
220 | } | |
221 | release_region(ioaddr, ARCNET_TOTAL_SIZE); /* end of probing */ | |
222 | return com90io_found(dev); | |
223 | ||
224 | err_out: | |
225 | release_region(ioaddr, ARCNET_TOTAL_SIZE); | |
226 | return -ENODEV; | |
227 | } | |
228 | ||
229 | ||
230 | /* Set up the struct net_device associated with this card. Called after | |
231 | * probing succeeds. | |
232 | */ | |
233 | static int __init com90io_found(struct net_device *dev) | |
234 | { | |
235 | struct arcnet_local *lp; | |
236 | int ioaddr = dev->base_addr; | |
237 | int err; | |
238 | ||
239 | /* Reserve the irq */ | |
a0607fd3 | 240 | if (request_irq(dev->irq, arcnet_interrupt, 0, "arcnet (COM90xx-IO)", dev)) { |
1da177e4 LT |
241 | BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq); |
242 | return -ENODEV; | |
243 | } | |
fb911ee8 | 244 | /* Reserve the I/O region */ |
1da177e4 LT |
245 | if (!request_region(dev->base_addr, ARCNET_TOTAL_SIZE, "arcnet (COM90xx-IO)")) { |
246 | free_irq(dev->irq, dev); | |
247 | return -EBUSY; | |
248 | } | |
249 | ||
454d7c9b | 250 | lp = netdev_priv(dev); |
1da177e4 LT |
251 | lp->card_name = "COM90xx I/O"; |
252 | lp->hw.command = com90io_command; | |
253 | lp->hw.status = com90io_status; | |
254 | lp->hw.intmask = com90io_setmask; | |
255 | lp->hw.reset = com90io_reset; | |
256 | lp->hw.owner = THIS_MODULE; | |
257 | lp->hw.copy_to_card = com90io_copy_to_card; | |
258 | lp->hw.copy_from_card = com90io_copy_from_card; | |
259 | ||
260 | lp->config = (0x16 | IOMAPflag) & ~ENABLE16flag; | |
261 | SETCONF(); | |
262 | ||
263 | /* get and check the station ID from offset 1 in shmem */ | |
264 | ||
265 | dev->dev_addr[0] = get_buffer_byte(dev, 1); | |
266 | ||
267 | err = register_netdev(dev); | |
268 | if (err) { | |
269 | outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG); | |
270 | free_irq(dev->irq, dev); | |
271 | release_region(dev->base_addr, ARCNET_TOTAL_SIZE); | |
272 | return err; | |
273 | } | |
274 | ||
275 | BUGMSG(D_NORMAL, "COM90IO: station %02Xh found at %03lXh, IRQ %d.\n", | |
276 | dev->dev_addr[0], dev->base_addr, dev->irq); | |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
281 | ||
282 | /* | |
283 | * Do a hardware reset on the card, and set up necessary registers. | |
284 | * | |
285 | * This should be called as little as possible, because it disrupts the | |
286 | * token on the network (causes a RECON) and requires a significant delay. | |
287 | * | |
288 | * However, it does make sure the card is in a defined state. | |
289 | */ | |
290 | static int com90io_reset(struct net_device *dev, int really_reset) | |
291 | { | |
454d7c9b | 292 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
293 | short ioaddr = dev->base_addr; |
294 | ||
295 | BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", dev->name, ASTATUS()); | |
296 | ||
297 | if (really_reset) { | |
298 | /* reset the card */ | |
299 | inb(_RESET); | |
300 | mdelay(RESETtime); | |
301 | } | |
302 | /* Set the thing to IO-mapped, 8-bit mode */ | |
303 | lp->config = (0x1C | IOMAPflag) & ~ENABLE16flag; | |
304 | SETCONF(); | |
305 | ||
306 | ACOMMAND(CFLAGScmd | RESETclear); /* clear flags & end reset */ | |
307 | ACOMMAND(CFLAGScmd | CONFIGclear); | |
308 | ||
309 | /* verify that the ARCnet signature byte is present */ | |
310 | if (get_buffer_byte(dev, 0) != TESTvalue) { | |
311 | BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n"); | |
312 | return 1; | |
313 | } | |
314 | /* enable extended (512-byte) packets */ | |
315 | ACOMMAND(CONFIGcmd | EXTconf); | |
316 | ||
317 | /* done! return success. */ | |
318 | return 0; | |
319 | } | |
320 | ||
321 | ||
322 | static void com90io_command(struct net_device *dev, int cmd) | |
323 | { | |
324 | short ioaddr = dev->base_addr; | |
325 | ||
326 | ACOMMAND(cmd); | |
327 | } | |
328 | ||
329 | ||
330 | static int com90io_status(struct net_device *dev) | |
331 | { | |
332 | short ioaddr = dev->base_addr; | |
333 | ||
334 | return ASTATUS(); | |
335 | } | |
336 | ||
337 | ||
338 | static void com90io_setmask(struct net_device *dev, int mask) | |
339 | { | |
340 | short ioaddr = dev->base_addr; | |
341 | ||
342 | AINTMASK(mask); | |
343 | } | |
344 | ||
345 | static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset, | |
346 | void *buf, int count) | |
347 | { | |
348 | TIME("put_whole_buffer", count, put_whole_buffer(dev, bufnum * 512 + offset, count, buf)); | |
349 | } | |
350 | ||
351 | ||
352 | static void com90io_copy_from_card(struct net_device *dev, int bufnum, int offset, | |
353 | void *buf, int count) | |
354 | { | |
355 | TIME("get_whole_buffer", count, get_whole_buffer(dev, bufnum * 512 + offset, count, buf)); | |
356 | } | |
357 | ||
358 | static int io; /* use the insmod io= irq= shmem= options */ | |
359 | static int irq; | |
360 | static char device[9]; /* use eg. device=arc1 to change name */ | |
361 | ||
362 | module_param(io, int, 0); | |
363 | module_param(irq, int, 0); | |
364 | module_param_string(device, device, sizeof(device), 0); | |
365 | MODULE_LICENSE("GPL"); | |
366 | ||
367 | #ifndef MODULE | |
368 | static int __init com90io_setup(char *s) | |
369 | { | |
370 | int ints[4]; | |
371 | s = get_options(s, 4, ints); | |
372 | if (!ints[0]) | |
373 | return 0; | |
374 | switch (ints[0]) { | |
375 | default: /* ERROR */ | |
376 | printk("com90io: Too many arguments.\n"); | |
377 | case 2: /* IRQ */ | |
378 | irq = ints[2]; | |
379 | case 1: /* IO address */ | |
380 | io = ints[1]; | |
381 | } | |
382 | if (*s) | |
383 | snprintf(device, sizeof(device), "%s", s); | |
384 | return 1; | |
385 | } | |
386 | __setup("com90io=", com90io_setup); | |
387 | #endif | |
388 | ||
389 | static struct net_device *my_dev; | |
390 | ||
391 | static int __init com90io_init(void) | |
392 | { | |
393 | struct net_device *dev; | |
394 | int err; | |
395 | ||
396 | dev = alloc_arcdev(device); | |
397 | if (!dev) | |
398 | return -ENOMEM; | |
399 | ||
1da177e4 LT |
400 | dev->base_addr = io; |
401 | dev->irq = irq; | |
402 | if (dev->irq == 2) | |
403 | dev->irq = 9; | |
404 | ||
405 | err = com90io_probe(dev); | |
406 | ||
407 | if (err) { | |
408 | free_netdev(dev); | |
409 | return err; | |
410 | } | |
411 | ||
412 | my_dev = dev; | |
413 | return 0; | |
414 | } | |
415 | ||
416 | static void __exit com90io_exit(void) | |
417 | { | |
418 | struct net_device *dev = my_dev; | |
419 | int ioaddr = dev->base_addr; | |
420 | ||
421 | unregister_netdev(dev); | |
422 | ||
423 | /* Set the thing back to MMAP mode, in case the old driver is loaded later */ | |
424 | outb((inb(_CONFIG) & ~IOMAPflag), _CONFIG); | |
425 | ||
426 | free_irq(dev->irq, dev); | |
427 | release_region(dev->base_addr, ARCNET_TOTAL_SIZE); | |
428 | free_netdev(dev); | |
429 | } | |
430 | ||
431 | module_init(com90io_init) | |
432 | module_exit(com90io_exit) |