FreeBSD/Linux Kernel Cross Reference
sys/isa/pnp.c
1 /*
2 * Copyright (c) 1996, Sujal M. Patel
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 * from: pnp.c,v 1.11 1999/05/06 22:11:19 peter Exp
28 */
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/bus.h>
35 #include <sys/malloc.h>
36 #include <isa/isavar.h>
37 #include <isa/pnpreg.h>
38 #include <isa/pnpvar.h>
39 #include <machine/clock.h>
40
41 typedef struct _pnp_id {
42 u_int32_t vendor_id;
43 u_int32_t serial;
44 u_char checksum;
45 } pnp_id;
46
47 struct pnp_set_config_arg {
48 int csn; /* Card number to configure */
49 int ldn; /* Logical device on card */
50 };
51
52 struct pnp_quirk {
53 u_int32_t vendor_id; /* Vendor of the card */
54 u_int32_t logical_id; /* ID of the device with quirk */
55 int type;
56 #define PNP_QUIRK_WRITE_REG 1 /* Need to write a pnp register */
57 int arg1;
58 int arg2;
59 };
60
61 struct pnp_quirk pnp_quirks[] = {
62 /*
63 * The Gravis UltraSound needs register 0xf2 to be set to 0xff
64 * to enable power.
65 * XXX need to know the logical device id.
66 */
67 { 0x0100561e /* GRV0001 */, 0,
68 PNP_QUIRK_WRITE_REG, 0xf2, 0xff },
69
70 { 0 }
71 };
72
73 #ifdef PC98
74 /* Some NEC PnP cards have 9 bytes serial code. */
75 static pnp_id necids[] = {
76 {0x4180a3b8, 0xffffffff, 0x00}, /* PC-9801CB-B04 (NEC8041) */
77 {0x5181a3b8, 0xffffffff, 0x46}, /* PC-9821CB2-B04(NEC8151) */
78 {0x5182a3b8, 0xffffffff, 0xb8}, /* PC-9801-XX (NEC8251) */
79 {0x9181a3b8, 0xffffffff, 0x00}, /* PC-9801-120 (NEC8191) */
80 {0, 0, 0}
81 };
82 #endif
83
84 #if 0
85 /*
86 * these entries are initialized using the autoconfig menu
87 * The struct is invalid (and must be initialized) if the first
88 * CSN is zero. The init code fills invalid entries with CSN 255
89 * which is not a supported value.
90 */
91
92 struct pnp_cinfo pnp_ldn_overrides[MAX_PNP_LDN] = {
93 { 0 }
94 };
95 #endif
96
97 /* The READ_DATA port that we are using currently */
98 static int pnp_rd_port;
99
100 static void pnp_send_initiation_key(void);
101 static int pnp_get_serial(pnp_id *p);
102 static int pnp_isolation_protocol(device_t parent);
103
104 char *
105 pnp_eisaformat(u_int32_t id)
106 {
107 u_int8_t *data = (u_int8_t *) &id;
108 static char idbuf[8];
109 const char hextoascii[] = "0123456789abcdef";
110
111 idbuf[0] = '@' + ((data[0] & 0x7c) >> 2);
112 idbuf[1] = '@' + (((data[0] & 0x3) << 3) + ((data[1] & 0xe0) >> 5));
113 idbuf[2] = '@' + (data[1] & 0x1f);
114 idbuf[3] = hextoascii[(data[2] >> 4)];
115 idbuf[4] = hextoascii[(data[2] & 0xf)];
116 idbuf[5] = hextoascii[(data[3] >> 4)];
117 idbuf[6] = hextoascii[(data[3] & 0xf)];
118 idbuf[7] = 0;
119 return(idbuf);
120 }
121
122 static void
123 pnp_write(int d, u_char r)
124 {
125 outb (_PNP_ADDRESS, d);
126 outb (_PNP_WRITE_DATA, r);
127 }
128
129 #if 0
130
131 static u_char
132 pnp_read(int d)
133 {
134 outb (_PNP_ADDRESS, d);
135 return (inb(3 | (pnp_rd_port <<2)));
136 }
137
138 #endif
139
140 /*
141 * Send Initiation LFSR as described in "Plug and Play ISA Specification",
142 * Intel May 94.
143 */
144 static void
145 pnp_send_initiation_key()
146 {
147 int cur, i;
148
149 /* Reset the LSFR */
150 outb(_PNP_ADDRESS, 0);
151 outb(_PNP_ADDRESS, 0); /* yes, we do need it twice! */
152
153 cur = 0x6a;
154 outb(_PNP_ADDRESS, cur);
155
156 for (i = 1; i < 32; i++) {
157 cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff);
158 outb(_PNP_ADDRESS, cur);
159 }
160 }
161
162
163 /*
164 * Get the device's serial number. Returns 1 if the serial is valid.
165 */
166 static int
167 pnp_get_serial(pnp_id *p)
168 {
169 int i, bit, valid = 0, sum = 0x6a;
170 u_char *data = (u_char *)p;
171
172 bzero(data, sizeof(char) * 9);
173 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION);
174 for (i = 0; i < 72; i++) {
175 bit = inb((pnp_rd_port << 2) | 0x3) == 0x55;
176 DELAY(250); /* Delay 250 usec */
177
178 /* Can't Short Circuit the next evaluation, so 'and' is last */
179 bit = (inb((pnp_rd_port << 2) | 0x3) == 0xaa) && bit;
180 DELAY(250); /* Delay 250 usec */
181
182 valid = valid || bit;
183
184 if (i < 64)
185 sum = (sum >> 1) |
186 (((sum ^ (sum >> 1) ^ bit) << 7) & 0xff);
187
188 data[i / 8] = (data[i / 8] >> 1) | (bit ? 0x80 : 0);
189 }
190
191 valid = valid && (data[8] == sum);
192
193 return valid;
194 }
195
196 /*
197 * Fill's the buffer with resource info from the device.
198 * Returns the number of characters read.
199 */
200 static int
201 pnp_get_resource_info(u_char *buffer, int len)
202 {
203 int i, j, count;
204 u_char temp;
205
206 count = 0;
207 for (i = 0; i < len; i++) {
208 outb(_PNP_ADDRESS, PNP_STATUS);
209 for (j = 0; j < 100; j++) {
210 if ((inb((pnp_rd_port << 2) | 0x3)) & 0x1)
211 break;
212 DELAY(1);
213 }
214 if (j == 100) {
215 printf("PnP device failed to report resource data\n");
216 return count;
217 }
218 outb(_PNP_ADDRESS, PNP_RESOURCE_DATA);
219 temp = inb((pnp_rd_port << 2) | 0x3);
220 if (buffer != NULL)
221 buffer[i] = temp;
222 count++;
223 }
224 return count;
225 }
226
227 #if 0
228 /*
229 * write_pnp_parms initializes a logical device with the parms
230 * in d, and then activates the board if the last parameter is 1.
231 */
232
233 static int
234 write_pnp_parms(struct pnp_cinfo *d, pnp_id *p, int ldn)
235 {
236 int i, empty = -1 ;
237
238 pnp_write (SET_LDN, ldn );
239 i = pnp_read(SET_LDN) ;
240 if (i != ldn) {
241 printf("Warning: LDN %d does not exist\n", ldn);
242 }
243 for (i = 0; i < 8; i++) {
244 pnp_write(IO_CONFIG_BASE + i * 2, d->ic_port[i] >> 8 );
245 pnp_write(IO_CONFIG_BASE + i * 2 + 1, d->ic_port[i] & 0xff );
246 }
247 for (i = 0; i < 4; i++) {
248 pnp_write(MEM_CONFIG + i*8, (d->ic_mem[i].base >> 16) & 0xff );
249 pnp_write(MEM_CONFIG + i*8+1, (d->ic_mem[i].base >> 8) & 0xff );
250 pnp_write(MEM_CONFIG + i*8+2, d->ic_mem[i].control & 0xff );
251 pnp_write(MEM_CONFIG + i*8+3, (d->ic_mem[i].range >> 16) & 0xff );
252 pnp_write(MEM_CONFIG + i*8+4, (d->ic_mem[i].range >> 8) & 0xff );
253 }
254 for (i = 0; i < 2; i++) {
255 pnp_write(IRQ_CONFIG + i*2 , d->irq[i] );
256 pnp_write(IRQ_CONFIG + i*2 + 1, d->irq_type[i] );
257 pnp_write(DRQ_CONFIG + i, d->drq[i] );
258 }
259 /*
260 * store parameters read into the current kernel
261 * so manual editing next time is easier
262 */
263 for (i = 0 ; i < MAX_PNP_LDN; i++) {
264 if (pnp_ldn_overrides[i].csn == d->csn &&
265 pnp_ldn_overrides[i].ldn == ldn) {
266 d->flags = pnp_ldn_overrides[i].flags ;
267 pnp_ldn_overrides[i] = *d ;
268 break ;
269 } else if (pnp_ldn_overrides[i].csn < 1 ||
270 pnp_ldn_overrides[i].csn == 255)
271 empty = i ;
272 }
273 if (i== MAX_PNP_LDN && empty != -1)
274 pnp_ldn_overrides[empty] = *d;
275
276 /*
277 * Here should really perform the range check, and
278 * return a failure if not successful.
279 */
280 pnp_write (IO_RANGE_CHECK, 0);
281 DELAY(1000); /* XXX is it really necessary ? */
282 pnp_write (ACTIVATE, d->enable ? 1 : 0);
283 DELAY(1000); /* XXX is it really necessary ? */
284 return 1 ;
285 }
286 #endif
287
288 /*
289 * This function is called after the bus has assigned resource
290 * locations for a logical device.
291 */
292 static void
293 pnp_set_config(void *arg, struct isa_config *config, int enable)
294 {
295 int csn = ((struct pnp_set_config_arg *) arg)->csn;
296 int ldn = ((struct pnp_set_config_arg *) arg)->ldn;
297 int i;
298
299 /*
300 * First put all cards into Sleep state with the initiation
301 * key, then put our card into Config state.
302 */
303 pnp_send_initiation_key();
304 pnp_write(PNP_WAKE, csn);
305
306 /*
307 * Select our logical device so that we can program it.
308 */
309 pnp_write(PNP_SET_LDN, ldn);
310
311 /*
312 * Now program the resources.
313 */
314 for (i = 0; i < config->ic_nmem; i++) {
315 u_int32_t start = config->ic_mem[i].ir_start;
316 u_int32_t size = config->ic_mem[i].ir_size;
317 if (start & 0xff)
318 panic("pnp_set_config: bogus memory assignment");
319 pnp_write(PNP_MEM_BASE_HIGH(i), (start >> 16) & 0xff);
320 pnp_write(PNP_MEM_BASE_LOW(i), (start >> 8) & 0xff);
321 pnp_write(PNP_MEM_RANGE_HIGH(i), (size >> 16) & 0xff);
322 pnp_write(PNP_MEM_RANGE_LOW(i), (size >> 8) & 0xff);
323 }
324 for (; i < ISA_NMEM; i++) {
325 pnp_write(PNP_MEM_BASE_HIGH(i), 0);
326 pnp_write(PNP_MEM_BASE_LOW(i), 0);
327 pnp_write(PNP_MEM_RANGE_HIGH(i), 0);
328 pnp_write(PNP_MEM_RANGE_LOW(i), 0);
329 }
330
331 for (i = 0; i < config->ic_nport; i++) {
332 u_int32_t start = config->ic_port[i].ir_start;
333 pnp_write(PNP_IO_BASE_HIGH(i), (start >> 8) & 0xff);
334 pnp_write(PNP_IO_BASE_LOW(i), (start >> 0) & 0xff);
335 }
336 for (; i < ISA_NPORT; i++) {
337 pnp_write(PNP_IO_BASE_HIGH(i), 0);
338 pnp_write(PNP_IO_BASE_LOW(i), 0);
339 }
340
341 for (i = 0; i < config->ic_nirq; i++) {
342 int irq = ffs(config->ic_irqmask[i]) - 1;
343 pnp_write(PNP_IRQ_LEVEL(i), irq);
344 pnp_write(PNP_IRQ_TYPE(i), 2); /* XXX */
345 }
346 for (; i < ISA_NIRQ; i++) {
347 /*
348 * IRQ 0 is not a valid interrupt selection and
349 * represents no interrupt selection.
350 */
351 pnp_write(PNP_IRQ_LEVEL(i), 0);
352 }
353
354 for (i = 0; i < config->ic_ndrq; i++) {
355 int drq = ffs(config->ic_drqmask[i]) - 1;
356 pnp_write(PNP_DMA_CHANNEL(i), drq);
357 }
358 for (; i < ISA_NDRQ; i++) {
359 /*
360 * DMA channel 4, the cascade channel is used to
361 * indicate no DMA channel is active.
362 */
363 pnp_write(PNP_DMA_CHANNEL(i), 4);
364 }
365
366 pnp_write(PNP_ACTIVATE, enable ? 1 : 0);
367
368 /*
369 * Wake everyone up again, we are finished.
370 */
371 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY);
372 }
373
374 /*
375 * Process quirks for a logical device.. The card must be in Config state.
376 */
377 static void
378 pnp_check_quirks(u_int32_t vendor_id, u_int32_t logical_id, int ldn)
379 {
380 struct pnp_quirk *qp;
381
382 for (qp = &pnp_quirks[0]; qp->vendor_id; qp++) {
383 if (qp->vendor_id == vendor_id
384 && (qp->logical_id == 0
385 || qp->logical_id == logical_id)) {
386 switch (qp->type) {
387 case PNP_QUIRK_WRITE_REG:
388 pnp_write(PNP_SET_LDN, ldn);
389 pnp_write(qp->arg1, qp->arg2);
390 break;
391 }
392 }
393 }
394 }
395
396 /*
397 * Scan Resource Data for Logical Devices.
398 *
399 * This function exits as soon as it gets an error reading *ANY*
400 * Resource Data or it reaches the end of Resource Data. In the first
401 * case the return value will be TRUE, FALSE otherwise.
402 */
403 static int
404 pnp_create_devices(device_t parent, pnp_id *p, int csn,
405 u_char *resources, int len)
406 {
407 u_char tag, *resp, *resinfo, *startres = 0;
408 int large_len, scanning = len, retval = FALSE;
409 u_int32_t logical_id;
410 u_int32_t compat_id;
411 device_t dev = 0;
412 int ldn = 0;
413 struct pnp_set_config_arg *csnldn;
414 char buf[100];
415 char *desc = 0;
416
417 resp = resources;
418 while (scanning > 0) {
419 tag = *resp++;
420 scanning--;
421 if (PNP_RES_TYPE(tag) != 0) {
422 /* Large resource */
423 if (scanning < 2) {
424 scanning = 0;
425 continue;
426 }
427 large_len = resp[0] + (resp[1] << 8);
428 resp += 2;
429
430 if (scanning < large_len) {
431 scanning = 0;
432 continue;
433 }
434 resinfo = resp;
435 resp += large_len;
436 scanning -= large_len;
437
438 if (PNP_LRES_NUM(tag) == PNP_TAG_ID_ANSI) {
439 if (large_len > sizeof(buf) - 1)
440 large_len = sizeof(buf) - 1;
441 bcopy(resinfo, buf, large_len);
442
443 /*
444 * Trim trailing spaces.
445 */
446 while (buf[large_len-1] == ' ')
447 large_len--;
448 buf[large_len] = '\0';
449 desc = buf;
450 if (dev)
451 device_set_desc_copy(dev, desc);
452 continue;
453 }
454
455 continue;
456 }
457
458 /* Small resource */
459 if (scanning < PNP_SRES_LEN(tag)) {
460 scanning = 0;
461 continue;
462 }
463 resinfo = resp;
464 resp += PNP_SRES_LEN(tag);
465 scanning -= PNP_SRES_LEN(tag);;
466
467 switch (PNP_SRES_NUM(tag)) {
468 case PNP_TAG_LOGICAL_DEVICE:
469 /*
470 * Parse the resources for the previous
471 * logical device (if any).
472 */
473 if (startres) {
474 pnp_parse_resources(dev, startres,
475 resinfo - startres - 1);
476 dev = 0;
477 startres = 0;
478 }
479
480 /*
481 * A new logical device. Scan for end of
482 * resources.
483 */
484 bcopy(resinfo, &logical_id, 4);
485 pnp_check_quirks(p->vendor_id, logical_id, ldn);
486 compat_id = 0;
487 dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1);
488 if (desc)
489 device_set_desc_copy(dev, desc);
490 isa_set_vendorid(dev, p->vendor_id);
491 isa_set_serial(dev, p->serial);
492 isa_set_logicalid(dev, logical_id);
493 csnldn = malloc(sizeof *csnldn, M_DEVBUF, M_NOWAIT);
494 if (!csnldn) {
495 device_printf(parent,
496 "out of memory\n");
497 scanning = 0;
498 break;
499 }
500 csnldn->csn = csn;
501 csnldn->ldn = ldn;
502 ISA_SET_CONFIG_CALLBACK(parent, dev,
503 pnp_set_config, csnldn);
504 ldn++;
505 startres = resp;
506 break;
507
508 case PNP_TAG_END:
509 if (!startres) {
510 device_printf(parent,
511 "malformed resources\n");
512 scanning = 0;
513 break;
514 }
515 pnp_parse_resources(dev, startres,
516 resinfo - startres - 1);
517 dev = 0;
518 startres = 0;
519 scanning = 0;
520 break;
521
522 default:
523 /* Skip this resource */
524 break;
525 }
526 }
527
528 return retval;
529 }
530
531 /*
532 * Read 'amount' bytes of resources from the card, allocating memory
533 * as needed. If a buffer is already available, it should be passed in
534 * '*resourcesp' and its length in '*spacep'. The number of resource
535 * bytes already in the buffer should be passed in '*lenp'. The memory
536 * allocated will be returned in '*resourcesp' with its size and the
537 * number of bytes of resources in '*spacep' and '*lenp' respectively.
538 */
539 static int
540 pnp_read_bytes(int amount, u_char **resourcesp, int *spacep, int *lenp)
541 {
542 u_char *resources = *resourcesp;
543 u_char *newres;
544 int space = *spacep;
545 int len = *lenp;
546
547 if (space == 0) {
548 space = 1024;
549 resources = malloc(space, M_TEMP, M_NOWAIT);
550 if (!resources)
551 return ENOMEM;
552 }
553
554 if (len + amount > space) {
555 int extra = 1024;
556 while (len + amount > space + extra)
557 extra += 1024;
558 newres = malloc(space + extra, M_TEMP, M_NOWAIT);
559 if (!newres)
560 return ENOMEM;
561 bcopy(resources, newres, len);
562 free(resources, M_TEMP);
563 resources = newres;
564 space += extra;
565 }
566
567 if (pnp_get_resource_info(resources + len, amount) != amount)
568 return EINVAL;
569 len += amount;
570
571 *resourcesp = resources;
572 *spacep = space;
573 *lenp = len;
574
575 return 0;
576 }
577
578 /*
579 * Read all resources from the card, allocating memory as needed. If a
580 * buffer is already available, it should be passed in '*resourcesp'
581 * and its length in '*spacep'. The memory allocated will be returned
582 * in '*resourcesp' with its size and the number of bytes of resources
583 * in '*spacep' and '*lenp' respectively.
584 */
585 static int
586 pnp_read_resources(u_char **resourcesp, int *spacep, int *lenp)
587 {
588 u_char *resources = *resourcesp;
589 int space = *spacep;
590 int len = 0;
591 int error, done;
592 u_char tag;
593
594 error = 0;
595 done = 0;
596 while (!done) {
597 error = pnp_read_bytes(1, &resources, &space, &len);
598 if (error)
599 goto out;
600 tag = resources[len-1];
601 if (PNP_RES_TYPE(tag) == 0) {
602 /*
603 * Small resource, read contents.
604 */
605 error = pnp_read_bytes(PNP_SRES_LEN(tag),
606 &resources, &space, &len);
607 if (error)
608 goto out;
609 if (PNP_SRES_NUM(tag) == PNP_TAG_END)
610 done = 1;
611 } else {
612 /*
613 * Large resource, read length and contents.
614 */
615 error = pnp_read_bytes(2, &resources, &space, &len);
616 if (error)
617 goto out;
618 error = pnp_read_bytes(resources[len-2]
619 + (resources[len-1] << 8),
620 &resources, &space, &len);
621 if (error)
622 goto out;
623 }
624 }
625
626 out:
627 *resourcesp = resources;
628 *spacep = space;
629 *lenp = len;
630 return error;
631 }
632
633 /*
634 * Run the isolation protocol. Use pnp_rd_port as the READ_DATA port
635 * value (caller should try multiple READ_DATA locations before giving
636 * up). Upon exiting, all cards are aware that they should use
637 * pnp_rd_port as the READ_DATA port.
638 *
639 * In the first pass, a csn is assigned to each board and pnp_id's
640 * are saved to an array, pnp_devices. In the second pass, each
641 * card is woken up and the device configuration is called.
642 */
643 static int
644 pnp_isolation_protocol(device_t parent)
645 {
646 int csn;
647 pnp_id id;
648 int found = 0, len;
649 u_char *resources = 0;
650 int space = 0;
651 int error;
652 #ifdef PC98
653 int n, necpnp;
654 u_char buffer[10];
655 #endif
656
657 /*
658 * Put all cards into the Sleep state so that we can clear
659 * their CSNs.
660 */
661 pnp_send_initiation_key();
662
663 /*
664 * Clear the CSN for all cards.
665 */
666 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_RESET_CSN);
667
668 /*
669 * Move all cards to the Isolation state.
670 */
671 pnp_write(PNP_WAKE, 0);
672
673 /*
674 * Tell them where the read point is going to be this time.
675 */
676 pnp_write(PNP_SET_RD_DATA, pnp_rd_port);
677
678 for (csn = 1; csn < PNP_MAX_CARDS; csn++) {
679 /*
680 * Start the serial isolation protocol.
681 */
682 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION);
683 DELAY(1000); /* Delay 1 msec */
684
685 if (pnp_get_serial(&id)) {
686 /*
687 * We have read the id from a card
688 * successfully. The card which won the
689 * isolation protocol will be in Isolation
690 * mode and all others will be in Sleep.
691 * Program the CSN of the isolated card
692 * (taking it to Config state) and read its
693 * resources, creating devices as we find
694 * logical devices on the card.
695 */
696 pnp_write(PNP_SET_CSN, csn);
697 #ifdef PC98
698 if (bootverbose)
699 printf("PnP Vendor ID = %x\n", id.vendor_id);
700 /* Check for NEC PnP (9 bytes serial). */
701 for (n = necpnp = 0; necids[n].vendor_id; n++) {
702 if (id.vendor_id == necids[n].vendor_id) {
703 necpnp = 1;
704 break;
705 }
706 }
707 if (necpnp) {
708 if (bootverbose)
709 printf("It seems to NEC-PnP card (%s).\n",
710 pnp_eisaformat(id.vendor_id));
711 /* Read dummy 9 bytes serial area. */
712 pnp_get_resource_info(buffer, 9);
713 } else {
714 if (bootverbose)
715 printf("It seems to Normal-ISA-PnP card (%s).\n",
716 pnp_eisaformat(id.vendor_id));
717 }
718 if (bootverbose)
719 printf("Reading PnP configuration for %s.\n",
720 pnp_eisaformat(id.vendor_id));
721 #endif
722 error = pnp_read_resources(&resources,
723 &space,
724 &len);
725 if (error)
726 break;
727 pnp_create_devices(parent, &id, csn,
728 resources, len);
729 found++;
730 } else
731 break;
732
733 /*
734 * Put this card back to the Sleep state and
735 * simultaneously move all cards which don't have a
736 * CSN yet to Isolation state.
737 */
738 pnp_write(PNP_WAKE, 0);
739 }
740
741 /*
742 * Unless we have chosen the wrong read port, all cards will
743 * be in Sleep state. Put them back into WaitForKey for
744 * now. Their resources will be programmed later.
745 */
746 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY);
747
748 /*
749 * Cleanup.
750 */
751 if (resources)
752 free(resources, M_TEMP);
753
754 return found;
755 }
756
757
758 /*
759 * pnp_identify()
760 *
761 * autoconfiguration of pnp devices. This routine just runs the
762 * isolation protocol over several ports, until one is successful.
763 *
764 * may be called more than once ?
765 *
766 */
767
768 static void
769 pnp_identify(driver_t *driver, device_t parent)
770 {
771 int num_pnp_devs;
772
773 #if 0
774 if (pnp_ldn_overrides[0].csn == 0) {
775 if (bootverbose)
776 printf("Initializing PnP override table\n");
777 bzero (pnp_ldn_overrides, sizeof(pnp_ldn_overrides));
778 pnp_ldn_overrides[0].csn = 255 ;
779 }
780 #endif
781
782 /* Try various READ_DATA ports from 0x203-0x3ff */
783 for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) {
784 if (bootverbose)
785 printf("Trying Read_Port at %x\n", (pnp_rd_port << 2) | 0x3);
786
787 num_pnp_devs = pnp_isolation_protocol(parent);
788 if (num_pnp_devs)
789 break;
790 }
791 }
792
793 static device_method_t pnp_methods[] = {
794 /* Device interface */
795 DEVMETHOD(device_identify, pnp_identify),
796
797 { 0, 0 }
798 };
799
800 static driver_t pnp_driver = {
801 "pnp",
802 pnp_methods,
803 1, /* no softc */
804 };
805
806 static devclass_t pnp_devclass;
807
808 DRIVER_MODULE(pnp, isa, pnp_driver, pnp_devclass, 0, 0);
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