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 * $FreeBSD: src/sys/pci/if_en_pci.c,v 1.12 1999/08/21 22:10:49 msmith Exp $
35 */
36
37 /*
38 *
39 * i f _ e n _ p c i . c
40 *
41 * author: Chuck Cranor <chuck@ccrc.wustl.edu>
42 * started: spring, 1996.
43 *
44 * FreeBSD PCI glue for the eni155p card.
45 * thanks to Matt Thomas for figuring out FreeBSD vs NetBSD vs etc.. diffs.
46 */
47
48 #include "use_en.h"
49
50 #include <sys/param.h>
51 #include <sys/bus.h>
52 #include <sys/kernel.h>
53 #include <sys/systm.h>
54 #if defined(__DragonFly__) || defined(__FreeBSD__)
55 #include <sys/eventhandler.h>
56 #endif
57 #include <sys/malloc.h>
58 #include <sys/socket.h>
59
60 #include <machine/clock.h> /* for DELAY */
61
62 #include <net/if.h>
63
64 #include "pcidevs.h"
65 #include <bus/pci/pcivar.h>
66 #include <bus/pci/pcireg.h>
67
68 #include <dev/atm/en/midwayreg.h>
69 #include <dev/atm/en/midwayvar.h>
70
71
72 /*
73 * prototypes
74 */
75
76 static void en_pci_attach (pcici_t, int);
77 static const char *en_pci_probe (pcici_t, pcidi_t);
78 static void en_pci_shutdown (void *, int);
79
80 /*
81 * local structures
82 */
83
84 struct en_pci_softc {
85 /* bus independent stuff */
86 struct en_softc esc; /* includes "device" structure */
87
88 /* PCI bus glue */
89 void *sc_ih; /* interrupt handle */
90 pci_chipset_tag_t en_pc; /* for PCI calls */
91 pcici_t en_confid; /* config id */
92 };
93
94 #if !defined(MIDWAY_ENIONLY)
95 static void eni_get_macaddr (struct en_pci_softc *);
96 #endif
97 #if !defined(MIDWAY_ADPONLY)
98 static void adp_get_macaddr (struct en_pci_softc *);
99 #endif
100
101 /*
102 * pointers to softcs (we alloc)
103 */
104
105 static struct en_pci_softc *enpcis[NEN] = {0};
106 extern struct cfdriver en_cd;
107
108 /*
109 * autoconfig structures
110 */
111
112 static u_long en_pci_count;
113
114 static struct pci_device endevice = {
115 "en",
116 en_pci_probe,
117 en_pci_attach,
118 &en_pci_count,
119 NULL,
120 };
121
122 COMPAT_PCI_DRIVER (if_en, endevice);
123
124 /*
125 * local defines (PCI specific stuff)
126 */
127
128 /*
129 * address of config base memory address register in PCI config space
130 * (this is card specific)
131 */
132
133 #define PCI_CBMA 0x10
134
135 /*
136 * tonga (pci bridge). ENI cards only!
137 */
138
139 #define EN_TONGA 0x60 /* PCI config addr of tonga reg */
140
141 #define TONGA_SWAP_DMA 0x80 /* endian swap control */
142 #define TONGA_SWAP_BYTE 0x40
143 #define TONGA_SWAP_WORD 0x20
144
145 /*
146 * adaptec pci bridge. ADP cards only!
147 */
148
149 #define ADP_PCIREG 0x050040 /* PCI control register */
150
151 #define ADP_PCIREG_RESET 0x1 /* reset card */
152 #define ADP_PCIREG_IENABLE 0x2 /* interrupt enable */
153 #define ADP_PCIREG_SWAP_WORD 0x4 /* swap byte on slave access */
154 #define ADP_PCIREG_SWAP_DMA 0x8 /* swap byte on DMA */
155
156 #define PCI_VENDOR(x) ((x) & 0xFFFF)
157 #define PCI_CHIPID(x) (((x) >> 16) & 0xFFFF)
158
159 #if !defined(MIDWAY_ENIONLY)
160
161 static void adp_busreset (void *);
162
163 /*
164 * bus specific reset function [ADP only!]
165 */
166
167 static void
168 adp_busreset(void *v)
169 {
170 struct en_softc *sc = (struct en_softc *) v;
171 u_int32_t dummy;
172
173 bus_space_write_4(sc->en_memt, sc->en_base, ADP_PCIREG, ADP_PCIREG_RESET);
174 DELAY(1000); /* let it reset */
175 dummy = bus_space_read_4(sc->en_memt, sc->en_base, ADP_PCIREG);
176 bus_space_write_4(sc->en_memt, sc->en_base, ADP_PCIREG,
177 (ADP_PCIREG_SWAP_WORD|ADP_PCIREG_SWAP_DMA|ADP_PCIREG_IENABLE));
178 dummy = bus_space_read_4(sc->en_memt, sc->en_base, ADP_PCIREG);
179 if ((dummy & (ADP_PCIREG_SWAP_WORD|ADP_PCIREG_SWAP_DMA)) !=
180 (ADP_PCIREG_SWAP_WORD|ADP_PCIREG_SWAP_DMA))
181 kprintf("adp_busreset: Adaptec ATM did NOT reset!\n");
182 }
183 #endif
184
185 /***********************************************************************/
186
187 /*
188 * autoconfig stuff
189 */
190
191 static const char *
192 en_pci_probe(pcici_t config_id, pcidi_t device_id)
193 {
194 #if !defined(MIDWAY_ADPONLY)
195 if (PCI_VENDOR(device_id) == PCI_VENDOR_EFFICIENTNETS &&
196 (PCI_CHIPID(device_id) == PCI_PRODUCT_EFFICIENTNETS_ENI155PF ||
197 PCI_CHIPID(device_id) == PCI_PRODUCT_EFFICIENTNETS_ENI155PA))
198 return "Efficient Networks ENI-155p";
199 #endif
200
201 #if !defined(MIDWAY_ENIONLY)
202 if (PCI_VENDOR(device_id) == PCI_VENDOR_ADP &&
203 (PCI_CHIPID(device_id) == PCI_PRODUCT_ADP_AIC5900 ||
204 PCI_CHIPID(device_id) == PCI_PRODUCT_ADP_AIC5905))
205 return "Adaptec 155 ATM";
206 #endif
207
208 return 0;
209 }
210
211 static void
212 en_pci_attach(pcici_t config_id, int unit)
213 {
214 struct en_softc *sc;
215 struct en_pci_softc *scp;
216 pcidi_t device_id;
217 int retval;
218 vm_offset_t pa;
219
220 if (unit >= NEN) {
221 kprintf("en%d: not configured; kernel is built for only %d device%s.\n",
222 unit, NEN, NEN == 1 ? "" : "s");
223 return;
224 }
225
226 scp = kmalloc(sizeof(*scp), M_DEVBUF, M_WAITOK | M_ZERO);
227 sc = &scp->esc;
228
229 retval = pci_map_mem(config_id, PCI_CBMA, (vm_offset_t *) &sc->en_base, &pa);
230
231 if (!retval) {
232 kfree((caddr_t) scp, M_DEVBUF);
233 return;
234 }
235 enpcis[unit] = scp; /* lock it in */
236 en_cd.cd_devs[unit] = sc; /* fake a cfdriver structure */
237 en_cd.cd_ndevs = NEN;
238 if_initname(&(sc->enif), "en", unit);
239 ksnprintf(sc->sc_dev.dv_xname, sizeof(sc->sc_dev.dv_xname), "%s",
240 sc->enif.if_xname);
241 scp->en_confid = config_id;
242
243 /*
244 * figure out if we are an adaptec card or not.
245 * XXX: why do we have to re-read PC_ID_REG when en_pci_probe already
246 * had that info?
247 */
248
249 device_id = pci_conf_read(config_id, PCI_ID_REG);
250 sc->is_adaptec = (PCI_VENDOR(device_id) == PCI_VENDOR_ADP) ? 1 : 0;
251
252 /*
253 * Add shutdown hook so that DMA is disabled prior to reboot. Not
254 * doing so could allow DMA to corrupt kernel memory during the
255 * reboot before the driver initializes.
256 */
257 EVENTHANDLER_REGISTER(shutdown_post_sync, en_pci_shutdown, scp,
258 SHUTDOWN_PRI_DRIVER);
259
260 if (!pci_map_int(config_id, en_intr, (void *) sc)) {
261 kprintf("%s: couldn't establish interrupt\n", sc->sc_dev.dv_xname);
262 return;
263 }
264 sc->ipl = 1; /* XXX */
265
266 /*
267 * set up pci bridge
268 */
269
270 #if !defined(MIDWAY_ENIONLY)
271 if (sc->is_adaptec) {
272 adp_get_macaddr(scp);
273 sc->en_busreset = adp_busreset;
274 adp_busreset(sc);
275 }
276 #endif
277
278 #if !defined(MIDWAY_ADPONLY)
279 if (!sc->is_adaptec) {
280 eni_get_macaddr(scp);
281 sc->en_busreset = NULL;
282 pci_conf_write(config_id, EN_TONGA, (TONGA_SWAP_DMA|TONGA_SWAP_WORD));
283 }
284 #endif
285
286 /*
287 * done PCI specific stuff
288 */
289
290 en_attach(sc);
291
292 }
293
294 static void
295 en_pci_shutdown(void *sc, int howto)
296 {
297 struct en_pci_softc *psc = (struct en_pci_softc *)sc;
298
299 en_reset(&psc->esc);
300 DELAY(10);
301 }
302
303 #if !defined(MIDWAY_ENIONLY)
304
305 #if defined(__DragonFly__) || defined(sparc) || defined(__FreeBSD__)
306 #define bus_space_read_1(t, h, o) \
307 ((void)t, (*(volatile u_int8_t *)((h) + (o))))
308 #endif
309
310 static void
311 adp_get_macaddr(struct en_pci_softc *scp)
312 {
313 struct en_softc * sc = (struct en_softc *)scp;
314 int lcv;
315
316 for (lcv = 0; lcv < sizeof(sc->macaddr); lcv++)
317 sc->macaddr[lcv] = bus_space_read_1(sc->en_memt, sc->en_base,
318 MID_ADPMACOFF + lcv);
319 }
320
321 #endif /* MIDWAY_ENIONLY */
322
323 #if !defined(MIDWAY_ADPONLY)
324
325 /*
326 * Read station (MAC) address from serial EEPROM.
327 * derived from linux drivers/atm/eni.c by Werner Almesberger, EPFL LRC.
328 */
329 #define EN_PROM_MAGIC 0x0c
330 #define EN_PROM_DATA 0x02
331 #define EN_PROM_CLK 0x01
332 #define EN_ESI 64
333
334 static void
335 eni_get_macaddr(struct en_pci_softc *scp)
336 {
337 struct en_softc * sc = (struct en_softc *)scp;
338 pcici_t id = scp->en_confid;
339 int i, j, address;
340 u_int32_t data, t_data;
341 u_int8_t tmp;
342
343 t_data = pci_conf_read(id, EN_TONGA) & 0xffffff00;
344
345 data = EN_PROM_MAGIC | EN_PROM_DATA | EN_PROM_CLK;
346 pci_conf_write(id, EN_TONGA, data);
347
348 for (i = 0; i < sizeof(sc->macaddr); i ++){
349 /* start operation */
350 data |= EN_PROM_DATA ;
351 pci_conf_write(id, EN_TONGA, data);
352 data |= EN_PROM_CLK ;
353 pci_conf_write(id, EN_TONGA, data);
354 data &= ~EN_PROM_DATA ;
355 pci_conf_write(id, EN_TONGA, data);
356 data &= ~EN_PROM_CLK ;
357 pci_conf_write(id, EN_TONGA, data);
358 /* send address with serial line */
359 address = ((i + EN_ESI) << 1) + 1;
360 for ( j = 7 ; j >= 0 ; j --){
361 data = (address >> j) & 1 ? data | EN_PROM_DATA :
362 data & ~EN_PROM_DATA;
363 pci_conf_write(id, EN_TONGA, data);
364 data |= EN_PROM_CLK ;
365 pci_conf_write(id, EN_TONGA, data);
366 data &= ~EN_PROM_CLK ;
367 pci_conf_write(id, EN_TONGA, data);
368 }
369 /* get ack */
370 data |= EN_PROM_DATA ;
371 pci_conf_write(id, EN_TONGA, data);
372 data |= EN_PROM_CLK ;
373 pci_conf_write(id, EN_TONGA, data);
374 data = pci_conf_read(id, EN_TONGA);
375 data &= ~EN_PROM_CLK ;
376 pci_conf_write(id, EN_TONGA, data);
377 data |= EN_PROM_DATA ;
378 pci_conf_write(id, EN_TONGA, data);
379
380 tmp = 0;
381
382 for ( j = 7 ; j >= 0 ; j --){
383 tmp <<= 1;
384 data |= EN_PROM_DATA ;
385 pci_conf_write(id, EN_TONGA, data);
386 data |= EN_PROM_CLK ;
387 pci_conf_write(id, EN_TONGA, data);
388 data = pci_conf_read(id, EN_TONGA);
389 if(data & EN_PROM_DATA) tmp |= 1;
390 data &= ~EN_PROM_CLK ;
391 pci_conf_write(id, EN_TONGA, data);
392 data |= EN_PROM_DATA ;
393 pci_conf_write(id, EN_TONGA, data);
394 }
395 /* get ack */
396 data |= EN_PROM_DATA ;
397 pci_conf_write(id, EN_TONGA, data);
398 data |= EN_PROM_CLK ;
399 pci_conf_write(id, EN_TONGA, data);
400 data = pci_conf_read(id, EN_TONGA);
401 data &= ~EN_PROM_CLK ;
402 pci_conf_write(id, EN_TONGA, data);
403 data |= EN_PROM_DATA ;
404 pci_conf_write(id, EN_TONGA, data);
405
406 sc->macaddr[i] = tmp;
407 }
408 /* stop operation */
409 data &= ~EN_PROM_DATA;
410 pci_conf_write(id, EN_TONGA, data);
411 data |= EN_PROM_CLK;
412 pci_conf_write(id, EN_TONGA, data);
413 data |= EN_PROM_DATA;
414 pci_conf_write(id, EN_TONGA, data);
415 pci_conf_write(id, EN_TONGA, t_data);
416 }
417
418 #endif /* !MIDWAY_ADPONLY */
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