1 /* $NetBSD: if_ai.c,v 1.36 2022/07/12 02:03:57 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Rafal K. Boni.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: if_ai.c,v 1.36 2022/07/12 02:03:57 thorpej Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/mbuf.h>
38 #include <sys/errno.h>
39 #include <sys/device.h>
40 #include <sys/protosw.h>
41 #include <sys/socket.h>
42
43 #include <net/if.h>
44 #include <net/if_dl.h>
45 #include <net/if_types.h>
46 #include <net/if_media.h>
47 #include <net/if_ether.h>
48
49 #include <sys/cpu.h>
50 #include <sys/bus.h>
51 #include <sys/intr.h>
52
53 #include <dev/isa/isareg.h>
54 #include <dev/isa/isavar.h>
55
56 #include <dev/ic/i82586reg.h>
57 #include <dev/ic/i82586var.h>
58 #include <dev/isa/if_aireg.h>
59
60 #ifdef AI_DEBUG
61 #define DPRINTF(x) printf x
62 #else
63 #define DPRINTF(x)
64 #endif
65
66 struct ai_softc {
67 struct ie_softc sc_ie;
68
69 bus_space_tag_t sc_regt; /* space tag for registers */
70 bus_space_handle_t sc_regh; /* space handle for registers */
71
72 uint8_t card_rev;
73 uint8_t card_type;
74
75 void *sc_ih; /* interrupt handle */
76 };
77
78 static const char *ai_names[] = {
79 "StarLAN 10",
80 "EN100",
81 "StarLAN Fiber",
82 };
83
84 /* Functions required by the i82586 MI driver */
85 static void ai_reset(struct ie_softc *, int);
86 static void ai_atten(struct ie_softc *, int);
87
88 static void ai_copyin(struct ie_softc *, void *, int, size_t);
89 static void ai_copyout(struct ie_softc *, const void *, int, size_t);
90
91 static uint16_t ai_read_16(struct ie_softc *, int);
92 static void ai_write_16(struct ie_softc *, int, uint16_t);
93 static void ai_write_24(struct ie_softc *, int, int);
94
95 /* Local support functions */
96 static int check_ie_present(struct ie_softc*, bus_space_tag_t,
97 bus_space_handle_t, bus_size_t);
98 static int ai_find_mem_size(struct ai_softc*, bus_space_tag_t,
99 bus_size_t);
100
101 static int ai_match(device_t, cfdata_t, void *);
102 static void ai_attach(device_t, device_t, void *);
103
104 /*
105 * AT&T StarLan support routines
106 */
107 static void
ai_reset(struct ie_softc * sc,int why)108 ai_reset(struct ie_softc *sc, int why)
109 {
110 struct ai_softc *asc = (struct ai_softc *)sc;
111
112 switch (why) {
113 case CHIP_PROBE:
114 /* Reset to chip to see if it responds */
115 bus_space_write_1(asc->sc_regt, asc->sc_regh, AI_RESET, 0);
116 DELAY(100);
117 break;
118
119 case CARD_RESET:
120 /*
121 * This takes around 10sec, and we can get
122 * by quite well w/out it...
123 */
124 break;
125 }
126 }
127
128 static void
ai_atten(struct ie_softc * sc,int why)129 ai_atten(struct ie_softc *sc, int why)
130 {
131 struct ai_softc *asc = (struct ai_softc *)sc;
132
133 bus_space_write_1(asc->sc_regt, asc->sc_regh, AI_ATTN, 0);
134 }
135
136 static void
ai_copyin(struct ie_softc * sc,void * dst,int offset,size_t size)137 ai_copyin(struct ie_softc *sc, void *dst, int offset, size_t size)
138 {
139 int dribble;
140 uint8_t *bptr = dst;
141
142 if (offset % 2) {
143 *bptr = bus_space_read_1(sc->bt, sc->bh, offset);
144 offset++; bptr++; size--;
145 }
146
147 dribble = size % 2;
148 bus_space_read_region_2(sc->bt, sc->bh, offset, (uint16_t *)bptr,
149 size >> 1);
150
151 if (dribble) {
152 bptr += size - 1;
153 offset += size - 1;
154 *bptr = bus_space_read_1(sc->bt, sc->bh, offset);
155 }
156 }
157
158 static void
ai_copyout(struct ie_softc * sc,const void * src,int offset,size_t size)159 ai_copyout(struct ie_softc *sc, const void *src, int offset, size_t size)
160 {
161 int dribble;
162 const uint8_t *bptr = src;
163
164 if (offset % 2) {
165 bus_space_write_1(sc->bt, sc->bh, offset, *bptr);
166 offset++; bptr++; size--;
167 }
168
169 dribble = size % 2;
170 bus_space_write_region_2(sc->bt, sc->bh, offset,
171 (const uint16_t *)bptr, size >> 1);
172 if (dribble) {
173 bptr += size - 1;
174 offset += size - 1;
175 bus_space_write_1(sc->bt, sc->bh, offset, *bptr);
176 }
177 }
178
179 static uint16_t
ai_read_16(struct ie_softc * sc,int offset)180 ai_read_16(struct ie_softc *sc, int offset)
181 {
182
183 return bus_space_read_2(sc->bt, sc->bh, offset);
184 }
185
186 static void
ai_write_16(struct ie_softc * sc,int offset,uint16_t value)187 ai_write_16(struct ie_softc *sc, int offset, uint16_t value)
188 {
189
190 bus_space_write_2(sc->bt, sc->bh, offset, value);
191 }
192
193 static void
ai_write_24(struct ie_softc * sc,int offset,int addr)194 ai_write_24(struct ie_softc *sc, int offset, int addr)
195 {
196
197 bus_space_write_4(sc->bt, sc->bh, offset, addr +
198 (u_long)sc->sc_maddr - (u_long)sc->sc_iobase);
199 }
200
201 int
ai_match(device_t parent,cfdata_t cf,void * aux)202 ai_match(device_t parent, cfdata_t cf, void *aux)
203 {
204 int rv = 0;
205 uint8_t val, type;
206 bus_size_t memsize;
207 bus_space_tag_t iot;
208 bus_space_handle_t ioh;
209 struct isa_attach_args * const ia = aux;
210 struct ai_softc asc;
211
212 if (ia->ia_nio < 1)
213 return 0;
214 if (ia->ia_niomem < 1)
215 return 0;
216 if (ia->ia_nirq < 1)
217 return 0;
218
219 if (ISA_DIRECT_CONFIG(ia))
220 return 0;
221
222 /* Punt if wildcarded port, IRQ or memory address */
223 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT ||
224 ia->ia_iomem[0].ir_addr == ISA_UNKNOWN_IOMEM ||
225 ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) {
226 DPRINTF((
227 "ai_match: wildcarded IRQ, IOAddr, or memAddr, skipping\n"));
228 return 0;
229 }
230
231 iot = ia->ia_iot;
232
233 /*
234 * This probe is horribly bad, but I have no info on this card other
235 * than the former driver, and it was just as bad!
236 */
237 if (bus_space_map(iot, ia->ia_io[0].ir_addr,
238 AI_IOSIZE, 0, &ioh) != 0) {
239
240 DPRINTF(("ai_match: cannot map %d IO ports @ 0x%x\n",
241 AI_IOSIZE, ia->ia_io[0].ir_addr));
242 return 0;
243 }
244
245 val = bus_space_read_1(iot, ioh, AI_REVISION);
246
247 type = SL_BOARD(val);
248 if (type != SL10_BOARD && type != EN100_BOARD &&
249 type != SLFIBER_BOARD) {
250 DPRINTF(("ai_match: unknown board code 0x%02x @ 0x%x\n",
251 type, ia->ia_io[0].ir_addr));
252 goto out;
253 }
254
255 /*
256 * Fill in just about enough of our local `ai_softc' for
257 * ai_find_mem_size() to do its job.
258 */
259 memset(&asc, 0, sizeof asc);
260 asc.sc_regt = iot;
261 asc.sc_regh = ioh;
262
263 if ((memsize = ai_find_mem_size(&asc, ia->ia_memt,
264 ia->ia_iomem[0].ir_addr)) == 0) {
265 DPRINTF(("ai_match: cannot size memory of board @ 0x%x\n",
266 ia->ia_io[0].ir_addr));
267 goto out;
268 }
269
270 if (ia->ia_iomem[0].ir_size != 0 &&
271 ia->ia_iomem[0].ir_size != memsize) {
272 DPRINTF((
273 "ai_match: memsize of board @ 0x%x doesn't match config\n",
274 ia->ia_io[0].ir_addr));
275 goto out;
276 }
277
278 rv = 1;
279
280 ia->ia_nio = 1;
281 ia->ia_io[0].ir_size = AI_IOSIZE;
282
283 ia->ia_niomem = 1;
284 ia->ia_iomem[0].ir_size = memsize;
285
286 ia->ia_nirq = 1;
287
288 ia->ia_ndrq = 0;
289
290 DPRINTF(("ai_match: found board @ 0x%x\n", ia->ia_io[0].ir_addr));
291
292 out:
293 bus_space_unmap(iot, ioh, AI_IOSIZE);
294 return rv;
295 }
296
297 void
ai_attach(device_t parent,device_t self,void * aux)298 ai_attach(device_t parent, device_t self, void *aux)
299 {
300 struct ai_softc *asc = device_private(self);
301 struct ie_softc *sc = &asc->sc_ie;
302 struct isa_attach_args *ia = aux;
303 uint8_t val = 0;
304 bus_space_handle_t ioh, memh;
305 uint8_t ethaddr[ETHER_ADDR_LEN];
306 char name[80];
307
308 sc->sc_dev = self;
309
310 if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr,
311 ia->ia_io[0].ir_size, 0, &ioh) != 0) {
312 DPRINTF(("\n%s: can't map i/o space 0x%x-0x%x\n",
313 device_xname(self),
314 ia->ia_io[0].ir_addr, ia->ia_io[0].ir_addr +
315 ia->ia_io[0].ir_size - 1));
316 return;
317 }
318
319 if (bus_space_map(ia->ia_memt, ia->ia_iomem[0].ir_addr,
320 ia->ia_iomem[0].ir_size, 0, &memh) != 0) {
321 DPRINTF(("\n%s: can't map iomem space 0x%x-0x%x\n",
322 device_xname(self),
323 ia->ia_iomem[0].ir_addr, ia->ia_iomem[0].ir_addr +
324 ia->ia_iomem[0].ir_size - 1));
325 bus_space_unmap(ia->ia_iot, ioh, ia->ia_io[0].ir_size);
326 return;
327 }
328
329 asc->sc_regt = ia->ia_iot;
330 asc->sc_regh = ioh;
331
332 sc->hwinit = NULL;
333 sc->intrhook = NULL;
334 sc->hwreset = ai_reset;
335 sc->chan_attn = ai_atten;
336
337 sc->ie_bus_barrier = NULL;
338
339 sc->memcopyin = ai_copyin;
340 sc->memcopyout = ai_copyout;
341 sc->ie_bus_read16 = ai_read_16;
342 sc->ie_bus_write16 = ai_write_16;
343 sc->ie_bus_write24 = ai_write_24;
344
345 sc->do_xmitnopchain = 0;
346
347 sc->sc_mediachange = NULL;
348 sc->sc_mediastatus = NULL;
349
350 sc->bt = ia->ia_memt;
351 sc->bh = memh;
352
353 /* Map i/o space. */
354 sc->sc_msize = ia->ia_iomem[0].ir_size;
355 sc->sc_maddr = (void *)memh;
356 sc->sc_iobase = (char *)sc->sc_maddr + sc->sc_msize - (1 << 24);
357
358 /* Set up pointers to important on-card control structures */
359 sc->iscp = 0;
360 sc->scb = IE_ISCP_SZ;
361 sc->scp = sc->sc_msize + IE_SCP_ADDR - (1 << 24);
362
363 sc->buf_area = sc->scb + IE_SCB_SZ;
364 sc->buf_area_sz = sc->sc_msize - IE_ISCP_SZ - IE_SCB_SZ - IE_SCP_SZ;
365
366 /* Zero card memory */
367 bus_space_set_region_1(sc->bt, sc->bh, 0, 0, sc->sc_msize);
368
369 /* Set card to 16-bit bus mode */
370 bus_space_write_1(sc->bt, sc->bh, IE_SCP_BUS_USE((u_long)sc->scp),
371 IE_SYSBUS_16BIT);
372
373 /* Set up pointers to key structures */
374 ai_write_24(sc, IE_SCP_ISCP((u_long)sc->scp), (u_long)sc->iscp);
375 ai_write_16(sc, IE_ISCP_SCB((u_long)sc->iscp), (u_long)sc->scb);
376 ai_write_24(sc, IE_ISCP_BASE((u_long)sc->iscp), (u_long)sc->iscp);
377
378 /* Flush setup of pointers, check if chip answers */
379 if (!i82586_proberam(sc)) {
380 DPRINTF(("\n%s: can't talk to i82586!\n",
381 device_xname(self)));
382 bus_space_unmap(ia->ia_iot, ioh, ia->ia_io[0].ir_size);
383 bus_space_unmap(ia->ia_memt, memh, ia->ia_iomem[0].ir_size);
384 return;
385 }
386
387 val = bus_space_read_1(asc->sc_regt, asc->sc_regh, AI_REVISION);
388 asc->card_rev = SL_REV(val);
389 asc->card_type = SL_BOARD(val) - 1;
390 snprintf(name, sizeof(name), "%s, rev. %d",
391 ai_names[asc->card_type], asc->card_rev);
392
393 i82586_attach(sc, name, ethaddr, NULL, 0, 0);
394
395 asc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
396 IST_EDGE, IPL_NET, i82586_intr, sc);
397 if (asc->sc_ih == NULL) {
398 DPRINTF(("\n%s: can't establish interrupt\n",
399 device_xname(self)));
400 }
401 }
402
403 /*
404 * Divine the memory size of this board.
405 * Better hope there's nothing important hiding just below the card...
406 */
407 static int
ai_find_mem_size(struct ai_softc * asc,bus_space_tag_t memt,bus_size_t maddr)408 ai_find_mem_size(struct ai_softc* asc, bus_space_tag_t memt, bus_size_t maddr)
409 {
410 int size;
411 bus_space_handle_t memh;
412 struct ie_softc *sc = &asc->sc_ie;
413
414 for (size = 65536; size >= 16384; size -= 16384) {
415 if (bus_space_map(memt, maddr, size, 0, &memh) == 0) {
416 size = check_ie_present(sc, memt, maddr, size);
417 bus_space_unmap(memt, memh, size);
418
419 if (size != 0)
420 return size;
421 }
422 }
423
424 return 0;
425 }
426
427 /*
428 * Check to see if there's an 82586 out there.
429 */
430 static int
check_ie_present(struct ie_softc * sc,bus_space_tag_t memt,bus_space_handle_t memh,bus_size_t size)431 check_ie_present(struct ie_softc* sc, bus_space_tag_t memt,
432 bus_space_handle_t memh, bus_size_t size)
433 {
434
435 sc->hwreset = ai_reset;
436 sc->chan_attn = ai_atten;
437 sc->ie_bus_read16 = ai_read_16;
438 sc->ie_bus_write16 = ai_write_16;
439
440 sc->bt = memt;
441 sc->bh = memh;
442 sc->sc_iobase = (char *)memh + size - (1 << 24);
443
444 sc->scp = size + IE_SCP_ADDR - (1 << 24);
445 bus_space_set_region_1(memt, memh, (u_long)sc->scp, 0, IE_SCP_SZ);
446
447 sc->iscp = 0;
448 bus_space_set_region_1(memt, memh, (u_long)sc->iscp, 0, IE_ISCP_SZ);
449
450 sc->scb = IE_ISCP_SZ;
451 bus_space_set_region_1(memt, memh, sc->scb, 0, IE_SCB_SZ);
452
453 /* Set card to 16-bit bus mode */
454 bus_space_write_1(sc->bt, sc->bh, IE_SCP_BUS_USE((u_long)sc->scp),
455 IE_SYSBUS_16BIT);
456
457 /* Set up pointers to key structures */
458 ai_write_24(sc, IE_SCP_ISCP((u_long)sc->scp), (u_long)sc->iscp);
459 ai_write_16(sc, IE_ISCP_SCB((u_long)sc->iscp), (u_long)sc->scb);
460 ai_write_24(sc, IE_ISCP_BASE((u_long)sc->iscp), (u_long)sc->iscp);
461
462 /* Flush setup of pointers, check if chip answers */
463 if (!i82586_proberam(sc))
464 return 0;
465
466 return size;
467 }
468
469 CFATTACH_DECL_NEW(ai, sizeof(struct ai_softc),
470 ai_match, ai_attach, NULL, NULL);
471