Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Linux ARCnet driver - COM90xx chipset (memory-mapped buffers) | |
cb334648 | 3 | * |
1da177e4 LT |
4 | * Written 1994-1999 by Avery Pennarun. |
5 | * Written 1999 by Martin Mares <mj@ucw.cz>. | |
6 | * Derived from skeleton.c by Donald Becker. | |
7 | * | |
8 | * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com) | |
9 | * for sponsoring the further development of this driver. | |
10 | * | |
11 | * ********************** | |
12 | * | |
13 | * The original copyright of skeleton.c was as follows: | |
14 | * | |
15 | * skeleton.c Written 1993 by Donald Becker. | |
16 | * Copyright 1993 United States Government as represented by the | |
17 | * Director, National Security Agency. This software may only be used | |
18 | * and distributed according to the terms of the GNU General Public License as | |
19 | * modified by SRC, incorporated herein by reference. | |
20 | * | |
21 | * ********************** | |
22 | * | |
23 | * For more details, see drivers/net/arcnet.c | |
24 | * | |
25 | * ********************** | |
26 | */ | |
05a24b23 JP |
27 | |
28 | #define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/moduleparam.h> | |
32 | #include <linux/init.h> | |
a6b7a407 | 33 | #include <linux/interrupt.h> |
1da177e4 LT |
34 | #include <linux/ioport.h> |
35 | #include <linux/delay.h> | |
36 | #include <linux/netdevice.h> | |
5a0e3ad6 | 37 | #include <linux/slab.h> |
5e7ef913 | 38 | #include <linux/io.h> |
26c6d281 JP |
39 | |
40 | #include "arcdevice.h" | |
8e0f295e | 41 | #include "com9026.h" |
1da177e4 | 42 | |
1da177e4 LT |
43 | /* Define this to speed up the autoprobe by assuming if only one io port and |
44 | * shmem are left in the list at Stage 5, they must correspond to each | |
45 | * other. | |
46 | * | |
47 | * This is undefined by default because it might not always be true, and the | |
48 | * extra check makes the autoprobe even more careful. Speed demons can turn | |
49 | * it on - I think it should be fine if you only have one ARCnet card | |
50 | * installed. | |
51 | * | |
52 | * If no ARCnet cards are installed, this delay never happens anyway and thus | |
53 | * the option has no effect. | |
54 | */ | |
55 | #undef FAST_PROBE | |
56 | ||
1da177e4 | 57 | /* Internal function declarations */ |
d0f6ecad | 58 | static int com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *); |
1da177e4 LT |
59 | static void com90xx_command(struct net_device *dev, int command); |
60 | static int com90xx_status(struct net_device *dev); | |
61 | static void com90xx_setmask(struct net_device *dev, int mask); | |
62 | static int com90xx_reset(struct net_device *dev, int really_reset); | |
63 | static void com90xx_copy_to_card(struct net_device *dev, int bufnum, int offset, | |
64 | void *buf, int count); | |
d6d7d3ed JP |
65 | static void com90xx_copy_from_card(struct net_device *dev, int bufnum, |
66 | int offset, void *buf, int count); | |
1da177e4 LT |
67 | |
68 | /* Known ARCnet cards */ | |
69 | ||
70 | static struct net_device *cards[16]; | |
71 | static int numcards; | |
72 | ||
73 | /* Handy defines for ARCnet specific stuff */ | |
74 | ||
75 | /* The number of low I/O ports used by the card */ | |
76 | #define ARCNET_TOTAL_SIZE 16 | |
77 | ||
78 | /* Amount of I/O memory used by the card */ | |
79 | #define BUFFER_SIZE (512) | |
cb334648 | 80 | #define MIRROR_SIZE (BUFFER_SIZE * 4) |
1da177e4 | 81 | |
1da177e4 LT |
82 | static int com90xx_skip_probe __initdata = 0; |
83 | ||
84 | /* Module parameters */ | |
85 | ||
86 | static int io; /* use the insmod io= irq= shmem= options */ | |
87 | static int irq; | |
88 | static int shmem; | |
89 | static char device[9]; /* use eg. device=arc1 to change name */ | |
90 | ||
06a5128a DH |
91 | module_param_hw(io, int, ioport, 0); |
92 | module_param_hw(irq, int, irq, 0); | |
1da177e4 LT |
93 | module_param(shmem, int, 0); |
94 | module_param_string(device, device, sizeof(device), 0); | |
95 | ||
96 | static void __init com90xx_probe(void) | |
97 | { | |
98 | int count, status, ioaddr, numprint, airq, openparen = 0; | |
99 | unsigned long airqmask; | |
7f5e760c | 100 | int ports[(0x3f0 - 0x200) / 16 + 1] = { 0 }; |
d0f6ecad AV |
101 | unsigned long *shmems; |
102 | void __iomem **iomem; | |
1da177e4 LT |
103 | int numports, numshmems, *port; |
104 | u_long *p; | |
d0f6ecad | 105 | int index; |
1da177e4 LT |
106 | |
107 | if (!io && !irq && !shmem && !*device && com90xx_skip_probe) | |
108 | return; | |
109 | ||
cb334648 | 110 | shmems = kzalloc(((0x100000 - 0xa0000) / 0x800) * sizeof(unsigned long), |
d0f6ecad AV |
111 | GFP_KERNEL); |
112 | if (!shmems) | |
113 | return; | |
cb334648 JP |
114 | iomem = kzalloc(((0x100000 - 0xa0000) / 0x800) * sizeof(void __iomem *), |
115 | GFP_KERNEL); | |
d0f6ecad AV |
116 | if (!iomem) { |
117 | kfree(shmems); | |
118 | return; | |
119 | } | |
120 | ||
72aeea48 | 121 | if (BUGLVL(D_NORMAL)) |
05a24b23 | 122 | pr_info("%s\n", "COM90xx chipset support"); |
1da177e4 LT |
123 | |
124 | /* set up the arrays where we'll store the possible probe addresses */ | |
125 | numports = numshmems = 0; | |
126 | if (io) | |
127 | ports[numports++] = io; | |
128 | else | |
129 | for (count = 0x200; count <= 0x3f0; count += 16) | |
130 | ports[numports++] = count; | |
131 | if (shmem) | |
132 | shmems[numshmems++] = shmem; | |
133 | else | |
134 | for (count = 0xA0000; count <= 0xFF800; count += 2048) | |
135 | shmems[numshmems++] = count; | |
136 | ||
137 | /* Stage 1: abandon any reserved ports, or ones with status==0xFF | |
138 | * (empty), and reset any others by reading the reset port. | |
139 | */ | |
140 | numprint = -1; | |
141 | for (port = &ports[0]; port - ports < numports; port++) { | |
142 | numprint++; | |
143 | numprint %= 8; | |
144 | if (!numprint) { | |
a34c0932 JP |
145 | arc_cont(D_INIT, "\n"); |
146 | arc_cont(D_INIT, "S1: "); | |
1da177e4 | 147 | } |
a34c0932 | 148 | arc_cont(D_INIT, "%Xh ", *port); |
1da177e4 LT |
149 | |
150 | ioaddr = *port; | |
151 | ||
d6d7d3ed JP |
152 | if (!request_region(*port, ARCNET_TOTAL_SIZE, |
153 | "arcnet (90xx)")) { | |
a34c0932 JP |
154 | arc_cont(D_INIT_REASONS, "(request_region)\n"); |
155 | arc_cont(D_INIT_REASONS, "S1: "); | |
72aeea48 JP |
156 | if (BUGLVL(D_INIT_REASONS)) |
157 | numprint = 0; | |
1da177e4 LT |
158 | *port-- = ports[--numports]; |
159 | continue; | |
160 | } | |
09dfbcd5 | 161 | if (arcnet_inb(ioaddr, COM9026_REG_R_STATUS) == 0xFF) { |
a34c0932 JP |
162 | arc_cont(D_INIT_REASONS, "(empty)\n"); |
163 | arc_cont(D_INIT_REASONS, "S1: "); | |
72aeea48 JP |
164 | if (BUGLVL(D_INIT_REASONS)) |
165 | numprint = 0; | |
1da177e4 LT |
166 | release_region(*port, ARCNET_TOTAL_SIZE); |
167 | *port-- = ports[--numports]; | |
168 | continue; | |
169 | } | |
09dfbcd5 JP |
170 | /* begin resetting card */ |
171 | arcnet_inb(ioaddr, COM9026_REG_R_RESET); | |
1da177e4 | 172 | |
a34c0932 JP |
173 | arc_cont(D_INIT_REASONS, "\n"); |
174 | arc_cont(D_INIT_REASONS, "S1: "); | |
72aeea48 JP |
175 | if (BUGLVL(D_INIT_REASONS)) |
176 | numprint = 0; | |
1da177e4 | 177 | } |
a34c0932 | 178 | arc_cont(D_INIT, "\n"); |
1da177e4 LT |
179 | |
180 | if (!numports) { | |
a34c0932 | 181 | arc_cont(D_NORMAL, "S1: No ARCnet cards found.\n"); |
d0f6ecad AV |
182 | kfree(shmems); |
183 | kfree(iomem); | |
1da177e4 LT |
184 | return; |
185 | } | |
186 | /* Stage 2: we have now reset any possible ARCnet cards, so we can't | |
187 | * do anything until they finish. If D_INIT, print the list of | |
188 | * cards that are left. | |
189 | */ | |
190 | numprint = -1; | |
191 | for (port = &ports[0]; port < ports + numports; port++) { | |
192 | numprint++; | |
193 | numprint %= 8; | |
194 | if (!numprint) { | |
a34c0932 JP |
195 | arc_cont(D_INIT, "\n"); |
196 | arc_cont(D_INIT, "S2: "); | |
1da177e4 | 197 | } |
a34c0932 | 198 | arc_cont(D_INIT, "%Xh ", *port); |
1da177e4 | 199 | } |
a34c0932 | 200 | arc_cont(D_INIT, "\n"); |
1da177e4 LT |
201 | mdelay(RESETtime); |
202 | ||
203 | /* Stage 3: abandon any shmem addresses that don't have the signature | |
204 | * 0xD1 byte in the right place, or are read-only. | |
205 | */ | |
206 | numprint = -1; | |
d0f6ecad AV |
207 | for (index = 0, p = &shmems[0]; index < numshmems; p++, index++) { |
208 | void __iomem *base; | |
1da177e4 LT |
209 | |
210 | numprint++; | |
211 | numprint %= 8; | |
212 | if (!numprint) { | |
a34c0932 JP |
213 | arc_cont(D_INIT, "\n"); |
214 | arc_cont(D_INIT, "S3: "); | |
1da177e4 | 215 | } |
a34c0932 | 216 | arc_cont(D_INIT, "%lXh ", *p); |
1da177e4 | 217 | |
d0f6ecad | 218 | if (!request_mem_region(*p, MIRROR_SIZE, "arcnet (90xx)")) { |
a34c0932 JP |
219 | arc_cont(D_INIT_REASONS, "(request_mem_region)\n"); |
220 | arc_cont(D_INIT_REASONS, "Stage 3: "); | |
72aeea48 JP |
221 | if (BUGLVL(D_INIT_REASONS)) |
222 | numprint = 0; | |
d0f6ecad AV |
223 | goto out; |
224 | } | |
225 | base = ioremap(*p, MIRROR_SIZE); | |
226 | if (!base) { | |
a34c0932 JP |
227 | arc_cont(D_INIT_REASONS, "(ioremap)\n"); |
228 | arc_cont(D_INIT_REASONS, "Stage 3: "); | |
72aeea48 JP |
229 | if (BUGLVL(D_INIT_REASONS)) |
230 | numprint = 0; | |
d0f6ecad | 231 | goto out1; |
1da177e4 | 232 | } |
a11a5442 | 233 | if (arcnet_readb(base, COM9026_REG_R_STATUS) != TESTvalue) { |
a34c0932 | 234 | arc_cont(D_INIT_REASONS, "(%02Xh != %02Xh)\n", |
a11a5442 JP |
235 | arcnet_readb(base, COM9026_REG_R_STATUS), |
236 | TESTvalue); | |
a34c0932 | 237 | arc_cont(D_INIT_REASONS, "S3: "); |
72aeea48 JP |
238 | if (BUGLVL(D_INIT_REASONS)) |
239 | numprint = 0; | |
d0f6ecad | 240 | goto out2; |
1da177e4 LT |
241 | } |
242 | /* By writing 0x42 to the TESTvalue location, we also make | |
243 | * sure no "mirror" shmem areas show up - if they occur | |
244 | * in another pass through this loop, they will be discarded | |
245 | * because *cptr != TESTvalue. | |
246 | */ | |
a11a5442 JP |
247 | arcnet_writeb(0x42, base, COM9026_REG_W_INTMASK); |
248 | if (arcnet_readb(base, COM9026_REG_R_STATUS) != 0x42) { | |
a34c0932 JP |
249 | arc_cont(D_INIT_REASONS, "(read only)\n"); |
250 | arc_cont(D_INIT_REASONS, "S3: "); | |
d0f6ecad | 251 | goto out2; |
1da177e4 | 252 | } |
a34c0932 JP |
253 | arc_cont(D_INIT_REASONS, "\n"); |
254 | arc_cont(D_INIT_REASONS, "S3: "); | |
72aeea48 JP |
255 | if (BUGLVL(D_INIT_REASONS)) |
256 | numprint = 0; | |
d0f6ecad AV |
257 | iomem[index] = base; |
258 | continue; | |
259 | out2: | |
260 | iounmap(base); | |
261 | out1: | |
262 | release_mem_region(*p, MIRROR_SIZE); | |
263 | out: | |
264 | *p-- = shmems[--numshmems]; | |
265 | index--; | |
1da177e4 | 266 | } |
a34c0932 | 267 | arc_cont(D_INIT, "\n"); |
1da177e4 LT |
268 | |
269 | if (!numshmems) { | |
a34c0932 | 270 | arc_cont(D_NORMAL, "S3: No ARCnet cards found.\n"); |
1da177e4 LT |
271 | for (port = &ports[0]; port < ports + numports; port++) |
272 | release_region(*port, ARCNET_TOTAL_SIZE); | |
d0f6ecad AV |
273 | kfree(shmems); |
274 | kfree(iomem); | |
1da177e4 LT |
275 | return; |
276 | } | |
277 | /* Stage 4: something of a dummy, to report the shmems that are | |
278 | * still possible after stage 3. | |
279 | */ | |
280 | numprint = -1; | |
281 | for (p = &shmems[0]; p < shmems + numshmems; p++) { | |
282 | numprint++; | |
283 | numprint %= 8; | |
284 | if (!numprint) { | |
a34c0932 JP |
285 | arc_cont(D_INIT, "\n"); |
286 | arc_cont(D_INIT, "S4: "); | |
1da177e4 | 287 | } |
a34c0932 | 288 | arc_cont(D_INIT, "%lXh ", *p); |
1da177e4 | 289 | } |
a34c0932 | 290 | arc_cont(D_INIT, "\n"); |
1da177e4 LT |
291 | |
292 | /* Stage 5: for any ports that have the correct status, can disable | |
293 | * the RESET flag, and (if no irq is given) generate an autoirq, | |
294 | * register an ARCnet device. | |
295 | * | |
296 | * Currently, we can only register one device per probe, so quit | |
297 | * after the first one is found. | |
298 | */ | |
299 | numprint = -1; | |
300 | for (port = &ports[0]; port < ports + numports; port++) { | |
301 | int found = 0; | |
01a1d5ac | 302 | |
1da177e4 LT |
303 | numprint++; |
304 | numprint %= 8; | |
305 | if (!numprint) { | |
a34c0932 JP |
306 | arc_cont(D_INIT, "\n"); |
307 | arc_cont(D_INIT, "S5: "); | |
1da177e4 | 308 | } |
a34c0932 | 309 | arc_cont(D_INIT, "%Xh ", *port); |
1da177e4 LT |
310 | |
311 | ioaddr = *port; | |
09dfbcd5 | 312 | status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS); |
1da177e4 LT |
313 | |
314 | if ((status & 0x9D) | |
315 | != (NORXflag | RECONflag | TXFREEflag | RESETflag)) { | |
a34c0932 JP |
316 | arc_cont(D_INIT_REASONS, "(status=%Xh)\n", status); |
317 | arc_cont(D_INIT_REASONS, "S5: "); | |
72aeea48 JP |
318 | if (BUGLVL(D_INIT_REASONS)) |
319 | numprint = 0; | |
1da177e4 LT |
320 | release_region(*port, ARCNET_TOTAL_SIZE); |
321 | *port-- = ports[--numports]; | |
322 | continue; | |
323 | } | |
09dfbcd5 JP |
324 | arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear, |
325 | ioaddr, COM9026_REG_W_COMMAND); | |
326 | status = arcnet_inb(ioaddr, COM9026_REG_R_STATUS); | |
1da177e4 | 327 | if (status & RESETflag) { |
a34c0932 JP |
328 | arc_cont(D_INIT_REASONS, " (eternal reset, status=%Xh)\n", |
329 | status); | |
330 | arc_cont(D_INIT_REASONS, "S5: "); | |
72aeea48 JP |
331 | if (BUGLVL(D_INIT_REASONS)) |
332 | numprint = 0; | |
1da177e4 LT |
333 | release_region(*port, ARCNET_TOTAL_SIZE); |
334 | *port-- = ports[--numports]; | |
335 | continue; | |
336 | } | |
337 | /* skip this completely if an IRQ was given, because maybe | |
338 | * we're on a machine that locks during autoirq! | |
339 | */ | |
340 | if (!irq) { | |
341 | /* if we do this, we're sure to get an IRQ since the | |
342 | * card has just reset and the NORXflag is on until | |
343 | * we tell it to start receiving. | |
344 | */ | |
345 | airqmask = probe_irq_on(); | |
09dfbcd5 | 346 | arcnet_outb(NORXflag, ioaddr, COM9026_REG_W_INTMASK); |
1da177e4 | 347 | udelay(1); |
09dfbcd5 | 348 | arcnet_outb(0, ioaddr, COM9026_REG_W_INTMASK); |
1da177e4 LT |
349 | airq = probe_irq_off(airqmask); |
350 | ||
351 | if (airq <= 0) { | |
a34c0932 JP |
352 | arc_cont(D_INIT_REASONS, "(airq=%d)\n", airq); |
353 | arc_cont(D_INIT_REASONS, "S5: "); | |
72aeea48 JP |
354 | if (BUGLVL(D_INIT_REASONS)) |
355 | numprint = 0; | |
1da177e4 LT |
356 | release_region(*port, ARCNET_TOTAL_SIZE); |
357 | *port-- = ports[--numports]; | |
358 | continue; | |
359 | } | |
360 | } else { | |
361 | airq = irq; | |
362 | } | |
363 | ||
a34c0932 | 364 | arc_cont(D_INIT, "(%d,", airq); |
1da177e4 LT |
365 | openparen = 1; |
366 | ||
367 | /* Everything seems okay. But which shmem, if any, puts | |
368 | * back its signature byte when the card is reset? | |
369 | * | |
370 | * If there are multiple cards installed, there might be | |
371 | * multiple shmems still in the list. | |
372 | */ | |
373 | #ifdef FAST_PROBE | |
374 | if (numports > 1 || numshmems > 1) { | |
09dfbcd5 | 375 | arcnet_inb(ioaddr, COM9026_REG_R_RESET); |
1da177e4 LT |
376 | mdelay(RESETtime); |
377 | } else { | |
378 | /* just one shmem and port, assume they match */ | |
a11a5442 JP |
379 | arcnet_writeb(TESTvalue, iomem[0], |
380 | COM9026_REG_W_INTMASK); | |
1da177e4 LT |
381 | } |
382 | #else | |
09dfbcd5 | 383 | arcnet_inb(ioaddr, COM9026_REG_R_RESET); |
1da177e4 LT |
384 | mdelay(RESETtime); |
385 | #endif | |
386 | ||
d0f6ecad AV |
387 | for (index = 0; index < numshmems; index++) { |
388 | u_long ptr = shmems[index]; | |
389 | void __iomem *base = iomem[index]; | |
1da177e4 | 390 | |
a11a5442 | 391 | if (arcnet_readb(base, COM9026_REG_R_STATUS) == TESTvalue) { /* found one */ |
a34c0932 | 392 | arc_cont(D_INIT, "%lXh)\n", *p); |
1da177e4 LT |
393 | openparen = 0; |
394 | ||
395 | /* register the card */ | |
d0f6ecad | 396 | if (com90xx_found(*port, airq, ptr, base) == 0) |
1da177e4 LT |
397 | found = 1; |
398 | numprint = -1; | |
399 | ||
400 | /* remove shmem from the list */ | |
d0f6ecad AV |
401 | shmems[index] = shmems[--numshmems]; |
402 | iomem[index] = iomem[numshmems]; | |
1da177e4 LT |
403 | break; /* go to the next I/O port */ |
404 | } else { | |
a11a5442 JP |
405 | arc_cont(D_INIT_REASONS, "%Xh-", |
406 | arcnet_readb(base, COM9026_REG_R_STATUS)); | |
1da177e4 LT |
407 | } |
408 | } | |
409 | ||
410 | if (openparen) { | |
72aeea48 | 411 | if (BUGLVL(D_INIT)) |
05a24b23 | 412 | pr_cont("no matching shmem)\n"); |
72aeea48 | 413 | if (BUGLVL(D_INIT_REASONS)) { |
05a24b23 | 414 | pr_cont("S5: "); |
72aeea48 JP |
415 | numprint = 0; |
416 | } | |
1da177e4 LT |
417 | } |
418 | if (!found) | |
419 | release_region(*port, ARCNET_TOTAL_SIZE); | |
420 | *port-- = ports[--numports]; | |
421 | } | |
422 | ||
72aeea48 | 423 | if (BUGLVL(D_INIT_REASONS)) |
05a24b23 | 424 | pr_cont("\n"); |
1da177e4 LT |
425 | |
426 | /* Now put back TESTvalue on all leftover shmems. */ | |
d0f6ecad | 427 | for (index = 0; index < numshmems; index++) { |
a11a5442 | 428 | arcnet_writeb(TESTvalue, iomem[index], COM9026_REG_W_INTMASK); |
d0f6ecad AV |
429 | iounmap(iomem[index]); |
430 | release_mem_region(shmems[index], MIRROR_SIZE); | |
1da177e4 | 431 | } |
d0f6ecad AV |
432 | kfree(shmems); |
433 | kfree(iomem); | |
1da177e4 LT |
434 | } |
435 | ||
553bc087 | 436 | static int __init check_mirror(unsigned long addr, size_t size) |
d0f6ecad AV |
437 | { |
438 | void __iomem *p; | |
439 | int res = -1; | |
440 | ||
441 | if (!request_mem_region(addr, size, "arcnet (90xx)")) | |
442 | return -1; | |
443 | ||
444 | p = ioremap(addr, size); | |
445 | if (p) { | |
a11a5442 | 446 | if (arcnet_readb(p, COM9026_REG_R_STATUS) == TESTvalue) |
d0f6ecad AV |
447 | res = 1; |
448 | else | |
449 | res = 0; | |
450 | iounmap(p); | |
451 | } | |
452 | ||
453 | release_mem_region(addr, size); | |
454 | return res; | |
455 | } | |
1da177e4 LT |
456 | |
457 | /* Set up the struct net_device associated with this card. Called after | |
458 | * probing succeeds. | |
459 | */ | |
d6d7d3ed JP |
460 | static int __init com90xx_found(int ioaddr, int airq, u_long shmem, |
461 | void __iomem *p) | |
1da177e4 LT |
462 | { |
463 | struct net_device *dev = NULL; | |
464 | struct arcnet_local *lp; | |
465 | u_long first_mirror, last_mirror; | |
466 | int mirror_size; | |
467 | ||
468 | /* allocate struct net_device */ | |
469 | dev = alloc_arcdev(device); | |
470 | if (!dev) { | |
a34c0932 | 471 | arc_cont(D_NORMAL, "com90xx: Can't allocate device!\n"); |
d0f6ecad AV |
472 | iounmap(p); |
473 | release_mem_region(shmem, MIRROR_SIZE); | |
1da177e4 LT |
474 | return -ENOMEM; |
475 | } | |
454d7c9b | 476 | lp = netdev_priv(dev); |
1da177e4 LT |
477 | /* find the real shared memory start/end points, including mirrors */ |
478 | ||
479 | /* guess the actual size of one "memory mirror" - the number of | |
480 | * bytes between copies of the shared memory. On most cards, it's | |
481 | * 2k (or there are no mirrors at all) but on some, it's 4k. | |
482 | */ | |
483 | mirror_size = MIRROR_SIZE; | |
a11a5442 | 484 | if (arcnet_readb(p, COM9026_REG_R_STATUS) == TESTvalue && |
d0f6ecad AV |
485 | check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 && |
486 | check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1) | |
487 | mirror_size = 2 * MIRROR_SIZE; | |
1da177e4 | 488 | |
d0f6ecad AV |
489 | first_mirror = shmem - mirror_size; |
490 | while (check_mirror(first_mirror, mirror_size) == 1) | |
1da177e4 LT |
491 | first_mirror -= mirror_size; |
492 | first_mirror += mirror_size; | |
493 | ||
d0f6ecad AV |
494 | last_mirror = shmem + mirror_size; |
495 | while (check_mirror(last_mirror, mirror_size) == 1) | |
1da177e4 LT |
496 | last_mirror += mirror_size; |
497 | last_mirror -= mirror_size; | |
498 | ||
499 | dev->mem_start = first_mirror; | |
500 | dev->mem_end = last_mirror + MIRROR_SIZE - 1; | |
501 | ||
d0f6ecad AV |
502 | iounmap(p); |
503 | release_mem_region(shmem, MIRROR_SIZE); | |
504 | ||
d6d7d3ed JP |
505 | if (!request_mem_region(dev->mem_start, |
506 | dev->mem_end - dev->mem_start + 1, | |
507 | "arcnet (90xx)")) | |
1da177e4 LT |
508 | goto err_free_dev; |
509 | ||
510 | /* reserve the irq */ | |
a0607fd3 | 511 | if (request_irq(airq, arcnet_interrupt, 0, "arcnet (90xx)", dev)) { |
a34c0932 | 512 | arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", airq); |
1da177e4 LT |
513 | goto err_release_mem; |
514 | } | |
515 | dev->irq = airq; | |
516 | ||
517 | /* Initialize the rest of the device structure. */ | |
518 | lp->card_name = "COM90xx"; | |
519 | lp->hw.command = com90xx_command; | |
520 | lp->hw.status = com90xx_status; | |
521 | lp->hw.intmask = com90xx_setmask; | |
522 | lp->hw.reset = com90xx_reset; | |
523 | lp->hw.owner = THIS_MODULE; | |
524 | lp->hw.copy_to_card = com90xx_copy_to_card; | |
525 | lp->hw.copy_from_card = com90xx_copy_from_card; | |
d6d7d3ed JP |
526 | lp->mem_start = ioremap(dev->mem_start, |
527 | dev->mem_end - dev->mem_start + 1); | |
1da177e4 | 528 | if (!lp->mem_start) { |
a34c0932 | 529 | arc_printk(D_NORMAL, dev, "Can't remap device memory!\n"); |
1da177e4 LT |
530 | goto err_free_irq; |
531 | } | |
532 | ||
533 | /* get and check the station ID from offset 1 in shmem */ | |
13b5ffa0 JK |
534 | arcnet_set_addr(dev, arcnet_readb(lp->mem_start, |
535 | COM9026_REG_R_STATION)); | |
1da177e4 LT |
536 | |
537 | dev->base_addr = ioaddr; | |
538 | ||
a34c0932 JP |
539 | arc_printk(D_NORMAL, dev, "COM90xx station %02Xh found at %03lXh, IRQ %d, ShMem %lXh (%ld*%xh).\n", |
540 | dev->dev_addr[0], | |
541 | dev->base_addr, dev->irq, dev->mem_start, | |
542 | (dev->mem_end - dev->mem_start + 1) / mirror_size, | |
543 | mirror_size); | |
1da177e4 LT |
544 | |
545 | if (register_netdev(dev)) | |
546 | goto err_unmap; | |
547 | ||
548 | cards[numcards++] = dev; | |
549 | return 0; | |
550 | ||
551 | err_unmap: | |
552 | iounmap(lp->mem_start); | |
553 | err_free_irq: | |
554 | free_irq(dev->irq, dev); | |
555 | err_release_mem: | |
556 | release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1); | |
557 | err_free_dev: | |
01365633 | 558 | free_arcdev(dev); |
1da177e4 LT |
559 | return -EIO; |
560 | } | |
561 | ||
1da177e4 LT |
562 | static void com90xx_command(struct net_device *dev, int cmd) |
563 | { | |
564 | short ioaddr = dev->base_addr; | |
565 | ||
09dfbcd5 | 566 | arcnet_outb(cmd, ioaddr, COM9026_REG_W_COMMAND); |
1da177e4 LT |
567 | } |
568 | ||
1da177e4 LT |
569 | static int com90xx_status(struct net_device *dev) |
570 | { | |
571 | short ioaddr = dev->base_addr; | |
572 | ||
09dfbcd5 | 573 | return arcnet_inb(ioaddr, COM9026_REG_R_STATUS); |
1da177e4 LT |
574 | } |
575 | ||
1da177e4 LT |
576 | static void com90xx_setmask(struct net_device *dev, int mask) |
577 | { | |
578 | short ioaddr = dev->base_addr; | |
579 | ||
09dfbcd5 | 580 | arcnet_outb(mask, ioaddr, COM9026_REG_W_INTMASK); |
1da177e4 LT |
581 | } |
582 | ||
f2f0a16b | 583 | /* Do a hardware reset on the card, and set up necessary registers. |
cb334648 | 584 | * |
1da177e4 LT |
585 | * This should be called as little as possible, because it disrupts the |
586 | * token on the network (causes a RECON) and requires a significant delay. | |
587 | * | |
588 | * However, it does make sure the card is in a defined state. | |
589 | */ | |
888432f6 | 590 | static int com90xx_reset(struct net_device *dev, int really_reset) |
1da177e4 | 591 | { |
454d7c9b | 592 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
593 | short ioaddr = dev->base_addr; |
594 | ||
09dfbcd5 JP |
595 | arc_printk(D_INIT, dev, "Resetting (status=%02Xh)\n", |
596 | arcnet_inb(ioaddr, COM9026_REG_R_STATUS)); | |
1da177e4 LT |
597 | |
598 | if (really_reset) { | |
599 | /* reset the card */ | |
09dfbcd5 | 600 | arcnet_inb(ioaddr, COM9026_REG_R_RESET); |
1da177e4 LT |
601 | mdelay(RESETtime); |
602 | } | |
09dfbcd5 JP |
603 | /* clear flags & end reset */ |
604 | arcnet_outb(CFLAGScmd | RESETclear, ioaddr, COM9026_REG_W_COMMAND); | |
605 | arcnet_outb(CFLAGScmd | CONFIGclear, ioaddr, COM9026_REG_W_COMMAND); | |
1da177e4 | 606 | |
09dfbcd5 | 607 | #if 0 |
1da177e4 | 608 | /* don't do this until we verify that it doesn't hurt older cards! */ |
09dfbcd5 JP |
609 | arcnet_outb(arcnet_inb(ioaddr, COM9026_REG_RW_CONFIG) | ENABLE16flag, |
610 | ioaddr, COM9026_REG_RW_CONFIG); | |
611 | #endif | |
1da177e4 LT |
612 | |
613 | /* verify that the ARCnet signature byte is present */ | |
a11a5442 | 614 | if (arcnet_readb(lp->mem_start, COM9026_REG_R_STATUS) != TESTvalue) { |
1da177e4 | 615 | if (really_reset) |
a34c0932 | 616 | arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n"); |
1da177e4 LT |
617 | return 1; |
618 | } | |
619 | /* enable extended (512-byte) packets */ | |
09dfbcd5 | 620 | arcnet_outb(CONFIGcmd | EXTconf, ioaddr, COM9026_REG_W_COMMAND); |
1da177e4 LT |
621 | |
622 | /* clean out all the memory to make debugging make more sense :) */ | |
72aeea48 JP |
623 | if (BUGLVL(D_DURING)) |
624 | memset_io(lp->mem_start, 0x42, 2048); | |
1da177e4 LT |
625 | |
626 | /* done! return success. */ | |
627 | return 0; | |
628 | } | |
629 | ||
d6d7d3ed JP |
630 | static void com90xx_copy_to_card(struct net_device *dev, int bufnum, |
631 | int offset, void *buf, int count) | |
1da177e4 | 632 | { |
454d7c9b | 633 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 | 634 | void __iomem *memaddr = lp->mem_start + bufnum * 512 + offset; |
01a1d5ac | 635 | |
a34c0932 | 636 | TIME(dev, "memcpy_toio", count, memcpy_toio(memaddr, buf, count)); |
1da177e4 LT |
637 | } |
638 | ||
d6d7d3ed JP |
639 | static void com90xx_copy_from_card(struct net_device *dev, int bufnum, |
640 | int offset, void *buf, int count) | |
1da177e4 | 641 | { |
454d7c9b | 642 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 | 643 | void __iomem *memaddr = lp->mem_start + bufnum * 512 + offset; |
01a1d5ac | 644 | |
a34c0932 | 645 | TIME(dev, "memcpy_fromio", count, memcpy_fromio(buf, memaddr, count)); |
1da177e4 LT |
646 | } |
647 | ||
538b22e7 | 648 | MODULE_DESCRIPTION("ARCnet COM90xx normal chipset driver"); |
1da177e4 LT |
649 | MODULE_LICENSE("GPL"); |
650 | ||
651 | static int __init com90xx_init(void) | |
652 | { | |
653 | if (irq == 2) | |
654 | irq = 9; | |
655 | com90xx_probe(); | |
656 | if (!numcards) | |
657 | return -EIO; | |
658 | return 0; | |
659 | } | |
660 | ||
661 | static void __exit com90xx_exit(void) | |
662 | { | |
663 | struct net_device *dev; | |
664 | struct arcnet_local *lp; | |
665 | int count; | |
666 | ||
667 | for (count = 0; count < numcards; count++) { | |
668 | dev = cards[count]; | |
454d7c9b | 669 | lp = netdev_priv(dev); |
1da177e4 LT |
670 | |
671 | unregister_netdev(dev); | |
672 | free_irq(dev->irq, dev); | |
673 | iounmap(lp->mem_start); | |
674 | release_region(dev->base_addr, ARCNET_TOTAL_SIZE); | |
d6d7d3ed JP |
675 | release_mem_region(dev->mem_start, |
676 | dev->mem_end - dev->mem_start + 1); | |
01365633 | 677 | free_arcdev(dev); |
1da177e4 LT |
678 | } |
679 | } | |
680 | ||
681 | module_init(com90xx_init); | |
682 | module_exit(com90xx_exit); | |
683 | ||
684 | #ifndef MODULE | |
685 | static int __init com90xx_setup(char *s) | |
686 | { | |
687 | int ints[8]; | |
688 | ||
689 | s = get_options(s, 8, ints); | |
690 | if (!ints[0] && !*s) { | |
05a24b23 | 691 | pr_notice("Disabled\n"); |
1da177e4 LT |
692 | return 1; |
693 | } | |
694 | ||
695 | switch (ints[0]) { | |
696 | default: /* ERROR */ | |
05a24b23 | 697 | pr_err("Too many arguments\n"); |
df561f66 | 698 | fallthrough; |
1da177e4 LT |
699 | case 3: /* Mem address */ |
700 | shmem = ints[3]; | |
df561f66 | 701 | fallthrough; |
1da177e4 LT |
702 | case 2: /* IRQ */ |
703 | irq = ints[2]; | |
df561f66 | 704 | fallthrough; |
1da177e4 LT |
705 | case 1: /* IO address */ |
706 | io = ints[1]; | |
707 | } | |
708 | ||
709 | if (*s) | |
710 | snprintf(device, sizeof(device), "%s", s); | |
711 | ||
712 | return 1; | |
713 | } | |
714 | ||
715 | __setup("com90xx=", com90xx_setup); | |
716 | #endif |