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[dragonfly.git] / sys / bus / isa / pnp.c
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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: src/sys/isa/pnp.c,v 1.5.2.1 2002/10/14 09:31:09 nyan Exp $
6c4c657b 27 * $DragonFly: src/sys/bus/isa/pnp.c,v 1.5 2004/04/07 05:54:32 dillon Exp $
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28 * from: pnp.c,v 1.11 1999/05/06 22:11:19 peter Exp
29 */
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/kernel.h>
34#include <sys/module.h>
35#include <sys/bus.h>
36#include <sys/malloc.h>
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37#include "isavar.h"
38#include "pnpreg.h"
39#include "pnpvar.h"
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40#include <machine/clock.h>
41
42typedef struct _pnp_id {
43 u_int32_t vendor_id;
44 u_int32_t serial;
45 u_char checksum;
46} pnp_id;
47
48struct pnp_set_config_arg {
49 int csn; /* Card number to configure */
50 int ldn; /* Logical device on card */
51};
52
53struct pnp_quirk {
54 u_int32_t vendor_id; /* Vendor of the card */
55 u_int32_t logical_id; /* ID of the device with quirk */
56 int type;
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57 int arg1;
58 int arg2;
59};
60
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61#define PNP_QUIRK_WRITE_REG 1 /* Need to write a pnp register */
62#define PNP_QUIRK_EXTRA_IO 2 /* Has extra io ports */
984263bc 63
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64struct pnp_quirk pnp_quirks[] = {
65 /*
66 * The Gravis UltraSound needs register 0xf2 to be set to 0xff
67 * to enable power.
68 * XXX need to know the logical device id.
69 */
70 { 0x0100561e /* GRV0001 */, 0,
71 PNP_QUIRK_WRITE_REG, 0xf2, 0xff },
72 /*
73 * An emu8000 does not give us other than the first
74 * port.
75 */
76 { 0x0100561e /* GRV0001 */, 0,
77 PNP_QUIRK_WRITE_REG, 0xf2, 0xff },
78 /*
79 * An emu8000 does not give us other than the first
80 * port.
81 */
82 { 0x26008c0e /* SB16 */, 0x21008c0e,
83 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 },
84 { 0x42008c0e /* SB32(CTL0042) */, 0x21008c0e,
85 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 },
86 { 0x44008c0e /* SB32(CTL0044) */, 0x21008c0e,
87 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 },
88 { 0x49008c0e /* SB32(CTL0049) */, 0x21008c0e,
89 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 },
90 { 0xf1008c0e /* SB32(CTL00f1) */, 0x21008c0e,
91 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 },
92 { 0xc1008c0e /* SB64(CTL00c1) */, 0x22008c0e,
93 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 },
94 { 0xc5008c0e /* SB64(CTL00c5) */, 0x22008c0e,
95 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 },
96 { 0xe4008c0e /* SB64(CTL00e4) */, 0x22008c0e,
97 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 },
98
99 { 0 }
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100};
101
102#ifdef PC98
103/* Some NEC PnP cards have 9 bytes serial code. */
104static pnp_id necids[] = {
105 {0x4180a3b8, 0xffffffff, 0x00}, /* PC-9801CB-B04 (NEC8041) */
106 {0x5181a3b8, 0xffffffff, 0x46}, /* PC-9821CB2-B04(NEC8151) */
107 {0x5182a3b8, 0xffffffff, 0xb8}, /* PC-9801-XX (NEC8251) */
108 {0x9181a3b8, 0xffffffff, 0x00}, /* PC-9801-120 (NEC8191) */
109 {0, 0, 0}
110};
111#endif
112
113#if 0
114/*
115 * these entries are initialized using the autoconfig menu
116 * The struct is invalid (and must be initialized) if the first
117 * CSN is zero. The init code fills invalid entries with CSN 255
118 * which is not a supported value.
119 */
120
121struct pnp_cinfo pnp_ldn_overrides[MAX_PNP_LDN] = {
122 { 0 }
123};
124#endif
125
126/* The READ_DATA port that we are using currently */
127static int pnp_rd_port;
128
129static void pnp_send_initiation_key(void);
130static int pnp_get_serial(pnp_id *p);
131static int pnp_isolation_protocol(device_t parent);
132
133char *
134pnp_eisaformat(u_int32_t id)
135{
136 u_int8_t *data = (u_int8_t *) &id;
137 static char idbuf[8];
138 const char hextoascii[] = "0123456789abcdef";
139
140 idbuf[0] = '@' + ((data[0] & 0x7c) >> 2);
141 idbuf[1] = '@' + (((data[0] & 0x3) << 3) + ((data[1] & 0xe0) >> 5));
142 idbuf[2] = '@' + (data[1] & 0x1f);
143 idbuf[3] = hextoascii[(data[2] >> 4)];
144 idbuf[4] = hextoascii[(data[2] & 0xf)];
145 idbuf[5] = hextoascii[(data[3] >> 4)];
146 idbuf[6] = hextoascii[(data[3] & 0xf)];
147 idbuf[7] = 0;
148 return(idbuf);
149}
150
151static void
152pnp_write(int d, u_char r)
153{
154 outb (_PNP_ADDRESS, d);
155 outb (_PNP_WRITE_DATA, r);
156}
157
158#if 0
159
160static u_char
161pnp_read(int d)
162{
163 outb (_PNP_ADDRESS, d);
164 return (inb(3 | (pnp_rd_port <<2)));
165}
166
167#endif
168
169/*
170 * Send Initiation LFSR as described in "Plug and Play ISA Specification",
171 * Intel May 94.
172 */
173static void
174pnp_send_initiation_key()
175{
176 int cur, i;
177
178 /* Reset the LSFR */
179 outb(_PNP_ADDRESS, 0);
180 outb(_PNP_ADDRESS, 0); /* yes, we do need it twice! */
181
182 cur = 0x6a;
183 outb(_PNP_ADDRESS, cur);
184
185 for (i = 1; i < 32; i++) {
186 cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff);
187 outb(_PNP_ADDRESS, cur);
188 }
189}
190
191
192/*
193 * Get the device's serial number. Returns 1 if the serial is valid.
194 */
195static int
196pnp_get_serial(pnp_id *p)
197{
198 int i, bit, valid = 0, sum = 0x6a;
199 u_char *data = (u_char *)p;
200
201 bzero(data, sizeof(char) * 9);
202 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION);
203 for (i = 0; i < 72; i++) {
204 bit = inb((pnp_rd_port << 2) | 0x3) == 0x55;
205 DELAY(250); /* Delay 250 usec */
206
207 /* Can't Short Circuit the next evaluation, so 'and' is last */
208 bit = (inb((pnp_rd_port << 2) | 0x3) == 0xaa) && bit;
209 DELAY(250); /* Delay 250 usec */
210
211 valid = valid || bit;
212
213 if (i < 64)
214 sum = (sum >> 1) |
215 (((sum ^ (sum >> 1) ^ bit) << 7) & 0xff);
216
217 data[i / 8] = (data[i / 8] >> 1) | (bit ? 0x80 : 0);
218 }
219
220 valid = valid && (data[8] == sum);
221
222 return valid;
223}
224
225/*
226 * Fill's the buffer with resource info from the device.
227 * Returns the number of characters read.
228 */
229static int
230pnp_get_resource_info(u_char *buffer, int len)
231{
232 int i, j, count;
233 u_char temp;
234
235 count = 0;
236 for (i = 0; i < len; i++) {
237 outb(_PNP_ADDRESS, PNP_STATUS);
238 for (j = 0; j < 100; j++) {
239 if ((inb((pnp_rd_port << 2) | 0x3)) & 0x1)
240 break;
241 DELAY(1);
242 }
243 if (j == 100) {
244 printf("PnP device failed to report resource data\n");
245 return count;
246 }
247 outb(_PNP_ADDRESS, PNP_RESOURCE_DATA);
248 temp = inb((pnp_rd_port << 2) | 0x3);
249 if (buffer != NULL)
250 buffer[i] = temp;
251 count++;
252 }
253 return count;
254}
255
256#if 0
257/*
258 * write_pnp_parms initializes a logical device with the parms
259 * in d, and then activates the board if the last parameter is 1.
260 */
261
262static int
263write_pnp_parms(struct pnp_cinfo *d, pnp_id *p, int ldn)
264{
265 int i, empty = -1 ;
266
267 pnp_write (SET_LDN, ldn );
268 i = pnp_read(SET_LDN) ;
269 if (i != ldn) {
270 printf("Warning: LDN %d does not exist\n", ldn);
271 }
272 for (i = 0; i < 8; i++) {
273 pnp_write(IO_CONFIG_BASE + i * 2, d->ic_port[i] >> 8 );
274 pnp_write(IO_CONFIG_BASE + i * 2 + 1, d->ic_port[i] & 0xff );
275 }
276 for (i = 0; i < 4; i++) {
277 pnp_write(MEM_CONFIG + i*8, (d->ic_mem[i].base >> 16) & 0xff );
278 pnp_write(MEM_CONFIG + i*8+1, (d->ic_mem[i].base >> 8) & 0xff );
279 pnp_write(MEM_CONFIG + i*8+2, d->ic_mem[i].control & 0xff );
280 pnp_write(MEM_CONFIG + i*8+3, (d->ic_mem[i].range >> 16) & 0xff );
281 pnp_write(MEM_CONFIG + i*8+4, (d->ic_mem[i].range >> 8) & 0xff );
282 }
283 for (i = 0; i < 2; i++) {
284 pnp_write(IRQ_CONFIG + i*2 , d->irq[i] );
285 pnp_write(IRQ_CONFIG + i*2 + 1, d->irq_type[i] );
286 pnp_write(DRQ_CONFIG + i, d->drq[i] );
287 }
288 /*
289 * store parameters read into the current kernel
290 * so manual editing next time is easier
291 */
292 for (i = 0 ; i < MAX_PNP_LDN; i++) {
293 if (pnp_ldn_overrides[i].csn == d->csn &&
294 pnp_ldn_overrides[i].ldn == ldn) {
295 d->flags = pnp_ldn_overrides[i].flags ;
296 pnp_ldn_overrides[i] = *d ;
297 break ;
298 } else if (pnp_ldn_overrides[i].csn < 1 ||
299 pnp_ldn_overrides[i].csn == 255)
300 empty = i ;
301 }
302 if (i== MAX_PNP_LDN && empty != -1)
303 pnp_ldn_overrides[empty] = *d;
304
305 /*
306 * Here should really perform the range check, and
307 * return a failure if not successful.
308 */
309 pnp_write (IO_RANGE_CHECK, 0);
310 DELAY(1000); /* XXX is it really necessary ? */
311 pnp_write (ACTIVATE, d->enable ? 1 : 0);
312 DELAY(1000); /* XXX is it really necessary ? */
313 return 1 ;
314}
315#endif
316
317/*
318 * This function is called after the bus has assigned resource
319 * locations for a logical device.
320 */
321static void
322pnp_set_config(void *arg, struct isa_config *config, int enable)
323{
324 int csn = ((struct pnp_set_config_arg *) arg)->csn;
325 int ldn = ((struct pnp_set_config_arg *) arg)->ldn;
326 int i;
327
328 /*
329 * First put all cards into Sleep state with the initiation
330 * key, then put our card into Config state.
331 */
332 pnp_send_initiation_key();
333 pnp_write(PNP_WAKE, csn);
334
335 /*
336 * Select our logical device so that we can program it.
337 */
338 pnp_write(PNP_SET_LDN, ldn);
339
340 /*
341 * Now program the resources.
342 */
343 for (i = 0; i < config->ic_nmem; i++) {
344 u_int32_t start = config->ic_mem[i].ir_start;
345 u_int32_t size = config->ic_mem[i].ir_size;
346 if (start & 0xff)
347 panic("pnp_set_config: bogus memory assignment");
348 pnp_write(PNP_MEM_BASE_HIGH(i), (start >> 16) & 0xff);
349 pnp_write(PNP_MEM_BASE_LOW(i), (start >> 8) & 0xff);
350 pnp_write(PNP_MEM_RANGE_HIGH(i), (size >> 16) & 0xff);
351 pnp_write(PNP_MEM_RANGE_LOW(i), (size >> 8) & 0xff);
352 }
353 for (; i < ISA_NMEM; i++) {
354 pnp_write(PNP_MEM_BASE_HIGH(i), 0);
355 pnp_write(PNP_MEM_BASE_LOW(i), 0);
356 pnp_write(PNP_MEM_RANGE_HIGH(i), 0);
357 pnp_write(PNP_MEM_RANGE_LOW(i), 0);
358 }
359
360 for (i = 0; i < config->ic_nport; i++) {
361 u_int32_t start = config->ic_port[i].ir_start;
362 pnp_write(PNP_IO_BASE_HIGH(i), (start >> 8) & 0xff);
363 pnp_write(PNP_IO_BASE_LOW(i), (start >> 0) & 0xff);
364 }
365 for (; i < ISA_NPORT; i++) {
366 pnp_write(PNP_IO_BASE_HIGH(i), 0);
367 pnp_write(PNP_IO_BASE_LOW(i), 0);
368 }
369
370 for (i = 0; i < config->ic_nirq; i++) {
371 int irq = ffs(config->ic_irqmask[i]) - 1;
372 pnp_write(PNP_IRQ_LEVEL(i), irq);
373 pnp_write(PNP_IRQ_TYPE(i), 2); /* XXX */
374 }
375 for (; i < ISA_NIRQ; i++) {
376 /*
377 * IRQ 0 is not a valid interrupt selection and
378 * represents no interrupt selection.
379 */
380 pnp_write(PNP_IRQ_LEVEL(i), 0);
381 }
382
383 for (i = 0; i < config->ic_ndrq; i++) {
384 int drq = ffs(config->ic_drqmask[i]) - 1;
385 pnp_write(PNP_DMA_CHANNEL(i), drq);
386 }
387 for (; i < ISA_NDRQ; i++) {
388 /*
389 * DMA channel 4, the cascade channel is used to
390 * indicate no DMA channel is active.
391 */
392 pnp_write(PNP_DMA_CHANNEL(i), 4);
393 }
394
395 pnp_write(PNP_ACTIVATE, enable ? 1 : 0);
396
397 /*
398 * Wake everyone up again, we are finished.
399 */
400 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY);
401}
402
403/*
404 * Process quirks for a logical device.. The card must be in Config state.
405 */
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406void
407pnp_check_quirks(u_int32_t vendor_id, u_int32_t logical_id,
408 int ldn, struct isa_config *config)
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409{
410 struct pnp_quirk *qp;
411
412 for (qp = &pnp_quirks[0]; qp->vendor_id; qp++) {
413 if (qp->vendor_id == vendor_id
414 && (qp->logical_id == 0
415 || qp->logical_id == logical_id)) {
416 switch (qp->type) {
417 case PNP_QUIRK_WRITE_REG:
418 pnp_write(PNP_SET_LDN, ldn);
419 pnp_write(qp->arg1, qp->arg2);
420 break;
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421 case PNP_QUIRK_EXTRA_IO:
422 if (config == NULL)
423 break;
424 if (qp->arg1 != 0) {
425 config->ic_nport++;
426 config->ic_port[config->ic_nport - 1] = config->ic_port[0];
427 config->ic_port[config->ic_nport - 1].ir_start += qp->arg1;
428 config->ic_port[config->ic_nport - 1].ir_end += qp->arg1;
429 }
430 if (qp->arg2 != 0) {
431 config->ic_nport++;
432 config->ic_port[config->ic_nport - 1] = config->ic_port[0];
433 config->ic_port[config->ic_nport - 1].ir_start += qp->arg2;
434 config->ic_port[config->ic_nport - 1].ir_end += qp->arg2;
435 }
436 break;
437
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438 }
439 }
440 }
441}
442
443/*
444 * Scan Resource Data for Logical Devices.
445 *
446 * This function exits as soon as it gets an error reading *ANY*
447 * Resource Data or it reaches the end of Resource Data. In the first
448 * case the return value will be TRUE, FALSE otherwise.
449 */
450static int
451pnp_create_devices(device_t parent, pnp_id *p, int csn,
452 u_char *resources, int len)
453{
454 u_char tag, *resp, *resinfo, *startres = 0;
455 int large_len, scanning = len, retval = FALSE;
456 u_int32_t logical_id;
457 u_int32_t compat_id;
458 device_t dev = 0;
459 int ldn = 0;
460 struct pnp_set_config_arg *csnldn;
461 char buf[100];
462 char *desc = 0;
463
464 resp = resources;
465 while (scanning > 0) {
466 tag = *resp++;
467 scanning--;
468 if (PNP_RES_TYPE(tag) != 0) {
469 /* Large resource */
470 if (scanning < 2) {
471 scanning = 0;
472 continue;
473 }
474 large_len = resp[0] + (resp[1] << 8);
475 resp += 2;
476
477 if (scanning < large_len) {
478 scanning = 0;
479 continue;
480 }
481 resinfo = resp;
482 resp += large_len;
483 scanning -= large_len;
484
485 if (PNP_LRES_NUM(tag) == PNP_TAG_ID_ANSI) {
486 if (large_len > sizeof(buf) - 1)
487 large_len = sizeof(buf) - 1;
488 bcopy(resinfo, buf, large_len);
489
490 /*
491 * Trim trailing spaces.
492 */
493 while (buf[large_len-1] == ' ')
494 large_len--;
495 buf[large_len] = '\0';
496 desc = buf;
497 if (dev)
498 device_set_desc_copy(dev, desc);
499 continue;
500 }
501
502 continue;
503 }
504
505 /* Small resource */
506 if (scanning < PNP_SRES_LEN(tag)) {
507 scanning = 0;
508 continue;
509 }
510 resinfo = resp;
511 resp += PNP_SRES_LEN(tag);
512 scanning -= PNP_SRES_LEN(tag);;
513
514 switch (PNP_SRES_NUM(tag)) {
515 case PNP_TAG_LOGICAL_DEVICE:
516 /*
517 * Parse the resources for the previous
518 * logical device (if any).
519 */
520 if (startres) {
521 pnp_parse_resources(dev, startres,
dcfd0003 522 resinfo - startres - 1, ldn);
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523 dev = 0;
524 startres = 0;
525 }
526
527 /*
528 * A new logical device. Scan for end of
529 * resources.
530 */
531 bcopy(resinfo, &logical_id, 4);
dcfd0003 532 pnp_check_quirks(p->vendor_id, logical_id, ldn, NULL);
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533 compat_id = 0;
534 dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1);
535 if (desc)
536 device_set_desc_copy(dev, desc);
537 isa_set_vendorid(dev, p->vendor_id);
538 isa_set_serial(dev, p->serial);
539 isa_set_logicalid(dev, logical_id);
6c4c657b 540 csnldn = malloc(sizeof *csnldn, M_DEVBUF, M_WAITOK);
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541 csnldn->csn = csn;
542 csnldn->ldn = ldn;
543 ISA_SET_CONFIG_CALLBACK(parent, dev,
544 pnp_set_config, csnldn);
545 ldn++;
546 startres = resp;
547 break;
548
549 case PNP_TAG_END:
550 if (!startres) {
551 device_printf(parent,
552 "malformed resources\n");
553 scanning = 0;
554 break;
555 }
556 pnp_parse_resources(dev, startres,
dcfd0003 557 resinfo - startres - 1, ldn);
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558 dev = 0;
559 startres = 0;
560 scanning = 0;
561 break;
562
563 default:
564 /* Skip this resource */
565 break;
566 }
567 }
568
569 return retval;
570}
571
572/*
573 * Read 'amount' bytes of resources from the card, allocating memory
574 * as needed. If a buffer is already available, it should be passed in
575 * '*resourcesp' and its length in '*spacep'. The number of resource
576 * bytes already in the buffer should be passed in '*lenp'. The memory
577 * allocated will be returned in '*resourcesp' with its size and the
578 * number of bytes of resources in '*spacep' and '*lenp' respectively.
579 */
580static int
581pnp_read_bytes(int amount, u_char **resourcesp, int *spacep, int *lenp)
582{
583 u_char *resources = *resourcesp;
584 u_char *newres;
585 int space = *spacep;
586 int len = *lenp;
587
588 if (space == 0) {
589 space = 1024;
6c4c657b 590 resources = malloc(space, M_TEMP, M_WAITOK);
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591 }
592
593 if (len + amount > space) {
594 int extra = 1024;
595 while (len + amount > space + extra)
596 extra += 1024;
6c4c657b 597 newres = malloc(space + extra, M_TEMP, M_WAITOK);
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598 bcopy(resources, newres, len);
599 free(resources, M_TEMP);
600 resources = newres;
601 space += extra;
602 }
603
604 if (pnp_get_resource_info(resources + len, amount) != amount)
605 return EINVAL;
606 len += amount;
607
608 *resourcesp = resources;
609 *spacep = space;
610 *lenp = len;
611
612 return 0;
613}
614
615/*
616 * Read all resources from the card, allocating memory as needed. If a
617 * buffer is already available, it should be passed in '*resourcesp'
618 * and its length in '*spacep'. The memory allocated will be returned
619 * in '*resourcesp' with its size and the number of bytes of resources
620 * in '*spacep' and '*lenp' respectively.
621 */
622static int
623pnp_read_resources(u_char **resourcesp, int *spacep, int *lenp)
624{
625 u_char *resources = *resourcesp;
626 int space = *spacep;
627 int len = 0;
628 int error, done;
629 u_char tag;
630
631 error = 0;
632 done = 0;
633 while (!done) {
634 error = pnp_read_bytes(1, &resources, &space, &len);
635 if (error)
636 goto out;
637 tag = resources[len-1];
638 if (PNP_RES_TYPE(tag) == 0) {
639 /*
640 * Small resource, read contents.
641 */
642 error = pnp_read_bytes(PNP_SRES_LEN(tag),
643 &resources, &space, &len);
644 if (error)
645 goto out;
646 if (PNP_SRES_NUM(tag) == PNP_TAG_END)
647 done = 1;
648 } else {
649 /*
650 * Large resource, read length and contents.
651 */
652 error = pnp_read_bytes(2, &resources, &space, &len);
653 if (error)
654 goto out;
655 error = pnp_read_bytes(resources[len-2]
656 + (resources[len-1] << 8),
657 &resources, &space, &len);
658 if (error)
659 goto out;
660 }
661 }
662
663 out:
664 *resourcesp = resources;
665 *spacep = space;
666 *lenp = len;
667 return error;
668}
669
670/*
671 * Run the isolation protocol. Use pnp_rd_port as the READ_DATA port
672 * value (caller should try multiple READ_DATA locations before giving
673 * up). Upon exiting, all cards are aware that they should use
674 * pnp_rd_port as the READ_DATA port.
675 *
676 * In the first pass, a csn is assigned to each board and pnp_id's
677 * are saved to an array, pnp_devices. In the second pass, each
678 * card is woken up and the device configuration is called.
679 */
680static int
681pnp_isolation_protocol(device_t parent)
682{
683 int csn;
684 pnp_id id;
685 int found = 0, len;
686 u_char *resources = 0;
687 int space = 0;
688 int error;
689#ifdef PC98
690 int n, necpnp;
691 u_char buffer[10];
692#endif
693
694 /*
695 * Put all cards into the Sleep state so that we can clear
696 * their CSNs.
697 */
698 pnp_send_initiation_key();
699
700 /*
701 * Clear the CSN for all cards.
702 */
703 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_RESET_CSN);
704
705 /*
706 * Move all cards to the Isolation state.
707 */
708 pnp_write(PNP_WAKE, 0);
709
710 /*
711 * Tell them where the read point is going to be this time.
712 */
713 pnp_write(PNP_SET_RD_DATA, pnp_rd_port);
714
715 for (csn = 1; csn < PNP_MAX_CARDS; csn++) {
716 /*
717 * Start the serial isolation protocol.
718 */
719 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION);
720 DELAY(1000); /* Delay 1 msec */
721
722 if (pnp_get_serial(&id)) {
723 /*
724 * We have read the id from a card
725 * successfully. The card which won the
726 * isolation protocol will be in Isolation
727 * mode and all others will be in Sleep.
728 * Program the CSN of the isolated card
729 * (taking it to Config state) and read its
730 * resources, creating devices as we find
731 * logical devices on the card.
732 */
733 pnp_write(PNP_SET_CSN, csn);
734#ifdef PC98
735 if (bootverbose)
736 printf("PnP Vendor ID = %x\n", id.vendor_id);
737 /* Check for NEC PnP (9 bytes serial). */
738 for (n = necpnp = 0; necids[n].vendor_id; n++) {
739 if (id.vendor_id == necids[n].vendor_id) {
740 necpnp = 1;
741 break;
742 }
743 }
744 if (necpnp) {
745 if (bootverbose)
746 printf("It seems to NEC-PnP card (%s).\n",
747 pnp_eisaformat(id.vendor_id));
748 /* Read dummy 9 bytes serial area. */
749 pnp_get_resource_info(buffer, 9);
750 } else {
751 if (bootverbose)
752 printf("It seems to Normal-ISA-PnP card (%s).\n",
753 pnp_eisaformat(id.vendor_id));
754 }
755 if (bootverbose)
756 printf("Reading PnP configuration for %s.\n",
757 pnp_eisaformat(id.vendor_id));
758#endif
759 error = pnp_read_resources(&resources,
760 &space,
761 &len);
762 if (error)
763 break;
764 pnp_create_devices(parent, &id, csn,
765 resources, len);
766 found++;
767 } else
768 break;
769
770 /*
771 * Put this card back to the Sleep state and
772 * simultaneously move all cards which don't have a
773 * CSN yet to Isolation state.
774 */
775 pnp_write(PNP_WAKE, 0);
776 }
777
778 /*
779 * Unless we have chosen the wrong read port, all cards will
780 * be in Sleep state. Put them back into WaitForKey for
781 * now. Their resources will be programmed later.
782 */
783 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY);
784
785 /*
786 * Cleanup.
787 */
788 if (resources)
789 free(resources, M_TEMP);
790
791 return found;
792}
793
794
795/*
796 * pnp_identify()
797 *
798 * autoconfiguration of pnp devices. This routine just runs the
799 * isolation protocol over several ports, until one is successful.
800 *
801 * may be called more than once ?
802 *
803 */
804
805static void
806pnp_identify(driver_t *driver, device_t parent)
807{
808 int num_pnp_devs;
809
810#if 0
811 if (pnp_ldn_overrides[0].csn == 0) {
812 if (bootverbose)
813 printf("Initializing PnP override table\n");
814 bzero (pnp_ldn_overrides, sizeof(pnp_ldn_overrides));
815 pnp_ldn_overrides[0].csn = 255 ;
816 }
817#endif
818
819 /* Try various READ_DATA ports from 0x203-0x3ff */
820 for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) {
821 if (bootverbose)
822 printf("Trying Read_Port at %x\n", (pnp_rd_port << 2) | 0x3);
823
824 num_pnp_devs = pnp_isolation_protocol(parent);
825 if (num_pnp_devs)
826 break;
827 }
828}
829
830static device_method_t pnp_methods[] = {
831 /* Device interface */
832 DEVMETHOD(device_identify, pnp_identify),
833
834 { 0, 0 }
835};
836
837static driver_t pnp_driver = {
838 "pnp",
839 pnp_methods,
840 1, /* no softc */
841};
842
843static devclass_t pnp_devclass;
844
845DRIVER_MODULE(pnp, isa, pnp_driver, pnp_devclass, 0, 0);