FreeBSD/Linux Kernel Cross Reference
sys/pci/if_en_pci.c
1 /* $NetBSD: if_en_pci.c,v 1.1 1996/06/22 02:00:31 chuck Exp $ */
2
3 /*
4 *
5 * Copyright (c) 1996 Charles D. Cranor and Washington University.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Charles D. Cranor and
19 * Washington University.
20 * 4. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 /*
36 *
37 * i f _ e n _ p c i . c
38 *
39 * author: Chuck Cranor <chuck@ccrc.wustl.edu>
40 * started: spring, 1996.
41 *
42 * FreeBSD PCI glue for the eni155p card.
43 * thanks to Matt Thomas for figuring out FreeBSD vs NetBSD vs etc.. diffs.
44 */
45
46 #include "en.h"
47 #include "pci.h"
48 #if (NEN > 0) && (NPCI > 0)
49
50 #include <sys/param.h>
51 #include <sys/kernel.h>
52 #include <sys/systm.h>
53 #include <sys/malloc.h>
54 #include <sys/socket.h>
55
56 #include <machine/clock.h> /* for DELAY */
57
58 #include <net/if.h>
59
60 #include <pci/pcivar.h>
61 #include <pci/pcireg.h>
62
63 #include <dev/en/midwayreg.h>
64 #include <dev/en/midwayvar.h>
65
66
67 /*
68 * prototypes
69 */
70
71 static void en_pci_attach __P((pcici_t, int));
72 static const char *en_pci_probe __P((pcici_t, pcidi_t));
73 static void en_pci_shutdown __P((int, void *));
74
75 /*
76 * local structures
77 */
78
79 struct en_pci_softc {
80 /* bus independent stuff */
81 struct en_softc esc; /* includes "device" structure */
82
83 /* PCI bus glue */
84 void *sc_ih; /* interrupt handle */
85 pci_chipset_tag_t en_pc; /* for PCI calls */
86 pcici_t en_confid; /* config id */
87 };
88
89 #if !defined(MIDWAY_ENIONLY)
90 static void eni_get_macaddr __P((struct en_pci_softc *));
91 #endif
92 #if !defined(MIDWAY_ADPONLY)
93 static void adp_get_macaddr __P((struct en_pci_softc *));
94 #endif
95
96 /*
97 * pointers to softcs (we alloc)
98 */
99
100 static struct en_pci_softc *enpcis[NEN] = {0};
101 extern struct cfdriver en_cd;
102
103 /*
104 * autoconfig structures
105 */
106
107 static u_long en_pci_count;
108
109 static struct pci_device endevice = {
110 "en",
111 en_pci_probe,
112 en_pci_attach,
113 &en_pci_count,
114 NULL,
115 };
116
117 DATA_SET (pcidevice_set, endevice);
118
119 /*
120 * local defines (PCI specific stuff)
121 */
122
123 /*
124 * address of config base memory address register in PCI config space
125 * (this is card specific)
126 */
127
128 #define PCI_CBMA 0x10
129
130 /*
131 * tonga (pci bridge). ENI cards only!
132 */
133
134 #define EN_TONGA 0x60 /* PCI config addr of tonga reg */
135
136 #define TONGA_SWAP_DMA 0x80 /* endian swap control */
137 #define TONGA_SWAP_BYTE 0x40
138 #define TONGA_SWAP_WORD 0x20
139
140 /*
141 * adaptec pci bridge. ADP cards only!
142 */
143
144 #define ADP_PCIREG 0x050040 /* PCI control register */
145
146 #define ADP_PCIREG_RESET 0x1 /* reset card */
147 #define ADP_PCIREG_IENABLE 0x2 /* interrupt enable */
148 #define ADP_PCIREG_SWAP_WORD 0x4 /* swap byte on slave access */
149 #define ADP_PCIREG_SWAP_DMA 0x8 /* swap byte on DMA */
150
151 #define PCI_VENDOR_EFFICIENTNETS 0x111a /* Efficent Networks */
152 #define PCI_PRODUCT_EFFICIENTNETS_ENI155PF 0x0000 /* ENI-155P ATM */
153 #define PCI_PRODUCT_EFFICIENTNETS_ENI155PA 0x0002 /* ENI-155P ATM */
154 #define PCI_VENDOR_ADP 0x9004 /* adaptec */
155 #define PCI_PRODUCT_ADP_AIC5900 0x5900
156 #define PCI_PRODUCT_ADP_AIC5905 0x5905
157 #define PCI_VENDOR(x) ((x) & 0xFFFF)
158 #define PCI_CHIPID(x) (((x) >> 16) & 0xFFFF)
159
160 #if !defined(MIDWAY_ENIONLY)
161
162 static void adp_busreset __P((void *));
163
164 /*
165 * bus specific reset function [ADP only!]
166 */
167
168 static void adp_busreset(v)
169
170 void *v;
171
172 {
173 struct en_softc *sc = (struct en_softc *) v;
174 u_int32_t dummy;
175
176 bus_space_write_4(sc->en_memt, sc->en_base, ADP_PCIREG, ADP_PCIREG_RESET);
177 DELAY(1000); /* let it reset */
178 dummy = bus_space_read_4(sc->en_memt, sc->en_base, ADP_PCIREG);
179 bus_space_write_4(sc->en_memt, sc->en_base, ADP_PCIREG,
180 (ADP_PCIREG_SWAP_WORD|ADP_PCIREG_SWAP_DMA|ADP_PCIREG_IENABLE));
181 dummy = bus_space_read_4(sc->en_memt, sc->en_base, ADP_PCIREG);
182 if ((dummy & (ADP_PCIREG_SWAP_WORD|ADP_PCIREG_SWAP_DMA)) !=
183 (ADP_PCIREG_SWAP_WORD|ADP_PCIREG_SWAP_DMA))
184 printf("adp_busreset: Adaptec ATM did NOT reset!\n");
185 }
186 #endif
187
188 /***********************************************************************/
189
190 /*
191 * autoconfig stuff
192 */
193
194 static const char *en_pci_probe(config_id, device_id)
195
196 pcici_t config_id;
197 pcidi_t device_id;
198
199 {
200 #if !defined(MIDWAY_ADPONLY)
201 if (PCI_VENDOR(device_id) == PCI_VENDOR_EFFICIENTNETS &&
202 (PCI_CHIPID(device_id) == PCI_PRODUCT_EFFICIENTNETS_ENI155PF ||
203 PCI_CHIPID(device_id) == PCI_PRODUCT_EFFICIENTNETS_ENI155PA))
204 return "Efficient Networks ENI-155p";
205 #endif
206
207 #if !defined(MIDWAY_ENIONLY)
208 if (PCI_VENDOR(device_id) == PCI_VENDOR_ADP &&
209 (PCI_CHIPID(device_id) == PCI_PRODUCT_ADP_AIC5900 ||
210 PCI_CHIPID(device_id) == PCI_PRODUCT_ADP_AIC5905))
211 return "Adaptec 155 ATM";
212 #endif
213
214 return 0;
215 }
216
217 static void en_pci_attach(config_id, unit)
218
219 pcici_t config_id;
220 int unit;
221
222 {
223 struct en_softc *sc;
224 struct en_pci_softc *scp;
225 pcidi_t device_id;
226 int retval;
227 vm_offset_t pa;
228
229 if (unit >= NEN) {
230 printf("en%d: not configured; kernel is built for only %d device%s.\n",
231 unit, NEN, NEN == 1 ? "" : "s");
232 return;
233 }
234
235 scp = (struct en_pci_softc *) malloc(sizeof(*scp), M_DEVBUF, M_NOWAIT);
236 if (scp == NULL)
237 return;
238 bzero(scp, sizeof(*scp)); /* zero */
239 sc = &scp->esc;
240
241 retval = pci_map_mem(config_id, PCI_CBMA, (vm_offset_t *) &sc->en_base, &pa);
242
243 if (!retval) {
244 free((caddr_t) scp, M_DEVBUF);
245 return;
246 }
247 enpcis[unit] = scp; /* lock it in */
248 en_cd.cd_devs[unit] = sc; /* fake a cfdriver structure */
249 en_cd.cd_ndevs = NEN;
250 snprintf(sc->sc_dev.dv_xname, sizeof(sc->sc_dev.dv_xname), "en%d", unit);
251 sc->enif.if_unit = unit;
252 sc->enif.if_name = "en";
253 scp->en_confid = config_id;
254
255 /*
256 * figure out if we are an adaptec card or not.
257 * XXX: why do we have to re-read PC_ID_REG when en_pci_probe already
258 * had that info?
259 */
260
261 device_id = pci_conf_read(config_id, PCI_ID_REG);
262 sc->is_adaptec = (PCI_VENDOR(device_id) == PCI_VENDOR_ADP) ? 1 : 0;
263
264 /*
265 * Add shutdown hook so that DMA is disabled prior to reboot. Not
266 * doing so could allow DMA to corrupt kernel memory during the
267 * reboot before the driver initializes.
268 */
269 at_shutdown(en_pci_shutdown, scp, SHUTDOWN_POST_SYNC);
270
271 if (!pci_map_int(config_id, en_intr, (void *) sc, &net_imask)) {
272 printf("%s: couldn't establish interrupt\n", sc->sc_dev.dv_xname);
273 return;
274 }
275 sc->ipl = 1; /* XXX */
276
277 /*
278 * set up pci bridge
279 */
280
281 #if !defined(MIDWAY_ENIONLY)
282 if (sc->is_adaptec) {
283 adp_get_macaddr(scp);
284 sc->en_busreset = adp_busreset;
285 adp_busreset(sc);
286 }
287 #endif
288
289 #if !defined(MIDWAY_ADPONLY)
290 if (!sc->is_adaptec) {
291 eni_get_macaddr(scp);
292 sc->en_busreset = NULL;
293 pci_conf_write(config_id, EN_TONGA, (TONGA_SWAP_DMA|TONGA_SWAP_WORD));
294 }
295 #endif
296
297 /*
298 * done PCI specific stuff
299 */
300
301 en_attach(sc);
302
303 }
304
305 static void
306 en_pci_shutdown(
307 int howto,
308 void *sc)
309 {
310 struct en_pci_softc *psc = (struct en_pci_softc *)sc;
311
312 en_reset(&psc->esc);
313 DELAY(10);
314 }
315
316 #if !defined(MIDWAY_ENIONLY)
317
318 #if defined(sparc) || defined(__FreeBSD__)
319 #define bus_space_read_1(t, h, o) \
320 ((void)t, (*(volatile u_int8_t *)((h) + (o))))
321 #endif
322
323 static void
324 adp_get_macaddr(scp)
325 struct en_pci_softc *scp;
326 {
327 struct en_softc * sc = (struct en_softc *)scp;
328 int lcv;
329
330 for (lcv = 0; lcv < sizeof(sc->macaddr); lcv++)
331 sc->macaddr[lcv] = bus_space_read_1(sc->en_memt, sc->en_base,
332 MID_ADPMACOFF + lcv);
333 }
334
335 #endif /* MIDWAY_ENIONLY */
336
337 #if !defined(MIDWAY_ADPONLY)
338
339 /*
340 * Read station (MAC) address from serial EEPROM.
341 * derived from linux drivers/atm/eni.c by Werner Almesberger, EPFL LRC.
342 */
343 #define EN_PROM_MAGIC 0x0c
344 #define EN_PROM_DATA 0x02
345 #define EN_PROM_CLK 0x01
346 #define EN_ESI 64
347
348 static void
349 eni_get_macaddr(scp)
350 struct en_pci_softc *scp;
351 {
352 struct en_softc * sc = (struct en_softc *)scp;
353 pcici_t id = scp->en_confid;
354 int i, j, address, status;
355 u_int32_t data, t_data;
356 u_int8_t tmp;
357
358 t_data = pci_conf_read(id, EN_TONGA) & 0xffffff00;
359
360 data = EN_PROM_MAGIC | EN_PROM_DATA | EN_PROM_CLK;
361 pci_conf_write(id, EN_TONGA, data);
362
363 for (i = 0; i < sizeof(sc->macaddr); i ++){
364 /* start operation */
365 data |= EN_PROM_DATA ;
366 pci_conf_write(id, EN_TONGA, data);
367 data |= EN_PROM_CLK ;
368 pci_conf_write(id, EN_TONGA, data);
369 data &= ~EN_PROM_DATA ;
370 pci_conf_write(id, EN_TONGA, data);
371 data &= ~EN_PROM_CLK ;
372 pci_conf_write(id, EN_TONGA, data);
373 /* send address with serial line */
374 address = ((i + EN_ESI) << 1) + 1;
375 for ( j = 7 ; j >= 0 ; j --){
376 data = (address >> j) & 1 ? data | EN_PROM_DATA :
377 data & ~EN_PROM_DATA;
378 pci_conf_write(id, EN_TONGA, data);
379 data |= EN_PROM_CLK ;
380 pci_conf_write(id, EN_TONGA, data);
381 data &= ~EN_PROM_CLK ;
382 pci_conf_write(id, EN_TONGA, data);
383 }
384 /* get ack */
385 data |= EN_PROM_DATA ;
386 pci_conf_write(id, EN_TONGA, data);
387 data |= EN_PROM_CLK ;
388 pci_conf_write(id, EN_TONGA, data);
389 data = pci_conf_read(id, EN_TONGA);
390 status = data & EN_PROM_DATA;
391 data &= ~EN_PROM_CLK ;
392 pci_conf_write(id, EN_TONGA, data);
393 data |= EN_PROM_DATA ;
394 pci_conf_write(id, EN_TONGA, data);
395
396 tmp = 0;
397
398 for ( j = 7 ; j >= 0 ; j --){
399 tmp <<= 1;
400 data |= EN_PROM_DATA ;
401 pci_conf_write(id, EN_TONGA, data);
402 data |= EN_PROM_CLK ;
403 pci_conf_write(id, EN_TONGA, data);
404 data = pci_conf_read(id, EN_TONGA);
405 if(data & EN_PROM_DATA) tmp |= 1;
406 data &= ~EN_PROM_CLK ;
407 pci_conf_write(id, EN_TONGA, data);
408 data |= EN_PROM_DATA ;
409 pci_conf_write(id, EN_TONGA, data);
410 }
411 /* get ack */
412 data |= EN_PROM_DATA ;
413 pci_conf_write(id, EN_TONGA, data);
414 data |= EN_PROM_CLK ;
415 pci_conf_write(id, EN_TONGA, data);
416 data = pci_conf_read(id, EN_TONGA);
417 status = data & EN_PROM_DATA;
418 data &= ~EN_PROM_CLK ;
419 pci_conf_write(id, EN_TONGA, data);
420 data |= EN_PROM_DATA ;
421 pci_conf_write(id, EN_TONGA, data);
422
423 sc->macaddr[i] = tmp;
424 }
425 /* stop operation */
426 data &= ~EN_PROM_DATA;
427 pci_conf_write(id, EN_TONGA, data);
428 data |= EN_PROM_CLK;
429 pci_conf_write(id, EN_TONGA, data);
430 data |= EN_PROM_DATA;
431 pci_conf_write(id, EN_TONGA, data);
432 pci_conf_write(id, EN_TONGA, t_data);
433 }
434
435 #endif /* !MIDWAY_ADPONLY */
436
437 #endif /* NEN > 0 && NPCI > 0 */
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