1 /* $NetBSD: if_le_ledma.c,v 1.38 2022/09/25 18:03:04 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum; Jason R. Thorpe of the Numerical Aerospace
9 * Simulation Facility, NASA Ames Research Center; Paul Kranenburg.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __KERNEL_RCSID(0, "$NetBSD: if_le_ledma.c,v 1.38 2022/09/25 18:03:04 thorpej Exp $");
35
36 #include "opt_inet.h"
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/mbuf.h>
41 #include <sys/syslog.h>
42 #include <sys/socket.h>
43 #include <sys/device.h>
44
45 #include <net/if.h>
46 #include <net/if_ether.h>
47 #include <net/if_media.h>
48
49 #ifdef INET
50 #include <netinet/in.h>
51 #include <netinet/if_inarp.h>
52 #endif
53
54 #include <sys/bus.h>
55 #include <sys/intr.h>
56 #include <machine/autoconf.h>
57
58 #include <dev/sbus/sbusvar.h>
59
60 #include <dev/ic/lsi64854reg.h>
61 #include <dev/ic/lsi64854var.h>
62
63 #include <dev/ic/lancereg.h>
64 #include <dev/ic/lancevar.h>
65 #include <dev/ic/am7990reg.h>
66 #include <dev/ic/am7990var.h>
67
68 #include "ioconf.h"
69
70 /*
71 * LANCE registers.
72 */
73 #define LEREG1_RDP 0 /* Register Data port */
74 #define LEREG1_RAP 2 /* Register Address port */
75
76 struct le_softc {
77 struct am7990_softc sc_am7990; /* glue to MI code */
78 bus_space_tag_t sc_bustag;
79 bus_dmamap_t sc_dmamap;
80 bus_space_handle_t sc_reg; /* LANCE registers */
81 struct lsi64854_softc *sc_dma; /* pointer to my dma */
82 u_int sc_laddr; /* LANCE DMA address */
83 u_int sc_lostcount;
84 #define LE_LOSTTHRESH 5 /* lost carrior count to switch media */
85 };
86
87 #define MEMSIZE (16*1024) /* LANCE memory size */
88 #define LEDMA_BOUNDARY (16*1024*1024) /* must not cross 16MB boundary */
89
90 int lematch_ledma(device_t, cfdata_t, void *);
91 void leattach_ledma(device_t, device_t, void *);
92
93 /*
94 * Media types supported by the Sun4m.
95 */
96 static int lemedia[] = {
97 IFM_ETHER | IFM_10_T,
98 IFM_ETHER | IFM_10_5,
99 IFM_ETHER | IFM_AUTO,
100 };
101 #define NLEMEDIA __arraycount(lemedia)
102
103 void lesetutp(struct lance_softc *);
104 void lesetaui(struct lance_softc *);
105
106 int lemediachange(struct lance_softc *);
107 void lemediastatus(struct lance_softc *, struct ifmediareq *);
108
109 CFATTACH_DECL_NEW(le_ledma, sizeof(struct le_softc),
110 lematch_ledma, leattach_ledma, NULL, NULL);
111
112 #if defined(_KERNEL_OPT)
113 #include "opt_ddb.h"
114 #endif
115
116 static void lewrcsr(struct lance_softc *, uint16_t, uint16_t);
117 static uint16_t lerdcsr(struct lance_softc *, uint16_t);
118 static void lehwreset(struct lance_softc *);
119 static void lehwinit(struct lance_softc *);
120 static void lenocarrier(struct lance_softc *);
121
122 static void
lewrcsr(struct lance_softc * sc,uint16_t port,uint16_t val)123 lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
124 {
125 struct le_softc *lesc = (struct le_softc *)sc;
126 bus_space_tag_t t = lesc->sc_bustag;
127 bus_space_handle_t h = lesc->sc_reg;
128
129 bus_space_write_2(t, h, LEREG1_RAP, port);
130 bus_space_write_2(t, h, LEREG1_RDP, val);
131
132 #if defined(SUN4M)
133 /*
134 * We need to flush the Sbus->Mbus write buffers. This can most
135 * easily be accomplished by reading back the register that we
136 * just wrote (thanks to Chris Torek for this solution).
137 */
138 (void)bus_space_read_2(t, h, LEREG1_RDP);
139 #endif
140 }
141
142 static uint16_t
lerdcsr(struct lance_softc * sc,uint16_t port)143 lerdcsr(struct lance_softc *sc, uint16_t port)
144 {
145 struct le_softc *lesc = (struct le_softc *)sc;
146 bus_space_tag_t t = lesc->sc_bustag;
147 bus_space_handle_t h = lesc->sc_reg;
148
149 bus_space_write_2(t, h, LEREG1_RAP, port);
150 return bus_space_read_2(t, h, LEREG1_RDP);
151 }
152
153 void
lesetutp(struct lance_softc * sc)154 lesetutp(struct lance_softc *sc)
155 {
156 struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma;
157 uint32_t csr;
158
159 csr = L64854_GCSR(dma);
160 csr |= E_TP_AUI;
161 L64854_SCSR(dma, csr);
162 delay(20000); /* must not touch le for 20ms */
163 }
164
165 void
lesetaui(struct lance_softc * sc)166 lesetaui(struct lance_softc *sc)
167 {
168 struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma;
169 uint32_t csr;
170
171 csr = L64854_GCSR(dma);
172 csr &= ~E_TP_AUI;
173 L64854_SCSR(dma, csr);
174 delay(20000); /* must not touch le for 20ms */
175 }
176
177 int
lemediachange(struct lance_softc * sc)178 lemediachange(struct lance_softc *sc)
179 {
180 struct ifmedia *ifm = &sc->sc_media;
181
182 if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
183 return EINVAL;
184
185 /*
186 * Switch to the selected media. If autoselect is
187 * set, we don't really have to do anything. We'll
188 * switch to the other media when we detect loss of
189 * carrier.
190 */
191 switch (IFM_SUBTYPE(ifm->ifm_media)) {
192 case IFM_10_T:
193 lesetutp(sc);
194 break;
195
196 case IFM_10_5:
197 lesetaui(sc);
198 break;
199
200 case IFM_AUTO:
201 break;
202
203 default:
204 return EINVAL;
205 }
206
207 return 0;
208 }
209
210 void
lemediastatus(struct lance_softc * sc,struct ifmediareq * ifmr)211 lemediastatus(struct lance_softc *sc, struct ifmediareq *ifmr)
212 {
213 struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma;
214
215 /*
216 * Notify the world which media we're currently using.
217 */
218 if (L64854_GCSR(dma) & E_TP_AUI)
219 ifmr->ifm_active = IFM_ETHER | IFM_10_T;
220 else
221 ifmr->ifm_active = IFM_ETHER | IFM_10_5;
222 }
223
224 static void
lehwreset(struct lance_softc * sc)225 lehwreset(struct lance_softc *sc)
226 {
227 struct le_softc *lesc = (struct le_softc *)sc;
228 struct lsi64854_softc *dma = lesc->sc_dma;
229 uint32_t csr;
230 u_int aui_bit;
231
232 /*
233 * Reset DMA channel.
234 */
235 csr = L64854_GCSR(dma);
236 aui_bit = csr & E_TP_AUI;
237 DMA_RESET(dma);
238
239 /* Write bits 24-31 of Lance address */
240 bus_space_write_4(dma->sc_bustag, dma->sc_regs, L64854_REG_ENBAR,
241 lesc->sc_laddr & 0xff000000);
242
243 DMA_ENINTR(dma);
244
245 /*
246 * Disable E-cache invalidates on chip writes.
247 * Retain previous cable selection bit.
248 */
249 csr = L64854_GCSR(dma);
250 csr |= (E_DSBL_WR_INVAL | aui_bit);
251 L64854_SCSR(dma, csr);
252 delay(20000); /* must not touch le for 20ms */
253 }
254
255 static void
lehwinit(struct lance_softc * sc)256 lehwinit(struct lance_softc *sc)
257 {
258
259 /*
260 * Make sure we're using the currently-enabled media type.
261 * XXX Actually, this is probably unnecessary, now.
262 */
263 switch (IFM_SUBTYPE(sc->sc_media.ifm_cur->ifm_media)) {
264 case IFM_10_T:
265 lesetutp(sc);
266 break;
267
268 case IFM_10_5:
269 lesetaui(sc);
270 break;
271 }
272 }
273
274 static void
lenocarrier(struct lance_softc * sc)275 lenocarrier(struct lance_softc *sc)
276 {
277 struct le_softc *lesc = (struct le_softc *)sc;
278
279 /* it may take a while for modern switches to set 10baseT media */
280 if (lesc->sc_lostcount++ < LE_LOSTTHRESH)
281 return;
282
283 lesc->sc_lostcount = 0;
284
285 /*
286 * Check if the user has requested a certain cable type, and
287 * if so, honor that request.
288 */
289 printf("%s: lost carrier on ", device_xname(sc->sc_dev));
290
291 if (L64854_GCSR(lesc->sc_dma) & E_TP_AUI) {
292 printf("UTP port");
293 switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) {
294 case IFM_10_5:
295 case IFM_AUTO:
296 printf(", switching to AUI port");
297 lesetaui(sc);
298 }
299 } else {
300 printf("AUI port");
301 switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) {
302 case IFM_10_T:
303 case IFM_AUTO:
304 printf(", switching to UTP port");
305 lesetutp(sc);
306 }
307 }
308 printf("\n");
309 }
310
311 int
lematch_ledma(device_t parent,cfdata_t cf,void * aux)312 lematch_ledma(device_t parent, cfdata_t cf, void *aux)
313 {
314 struct sbus_attach_args *sa = aux;
315
316 return (strcmp(cf->cf_name, sa->sa_name) == 0);
317 }
318
319
320 void
leattach_ledma(device_t parent,device_t self,void * aux)321 leattach_ledma(device_t parent, device_t self, void *aux)
322 {
323 struct le_softc *lesc = device_private(self);
324 struct lance_softc *sc = &lesc->sc_am7990.lsc;
325 struct lsi64854_softc *lsi = device_private(parent);
326 struct sbus_attach_args *sa = aux;
327 bus_dma_tag_t dmatag = sa->sa_dmatag;
328 bus_dma_segment_t seg;
329 int rseg, error;
330
331 sc->sc_dev = self;
332 lesc->sc_bustag = sa->sa_bustag;
333
334 /* Establish link to `ledma' device */
335 lesc->sc_dma = lsi;
336 lesc->sc_dma->sc_client = lesc;
337
338 /* Map device registers */
339 if (sbus_bus_map(sa->sa_bustag,
340 sa->sa_slot,
341 sa->sa_offset,
342 sa->sa_size,
343 0, &lesc->sc_reg) != 0) {
344 aprint_error(": cannot map registers\n");
345 return;
346 }
347
348 /* Allocate buffer memory */
349 sc->sc_memsize = MEMSIZE;
350
351 /* Get a DMA handle */
352 if ((error = bus_dmamap_create(dmatag, MEMSIZE, 1, MEMSIZE,
353 LEDMA_BOUNDARY, BUS_DMA_NOWAIT, &lesc->sc_dmamap)) != 0) {
354 aprint_error(": DMA map create error %d\n", error);
355 return;
356 }
357
358 /* Allocate DMA buffer */
359 if ((error = bus_dmamem_alloc(dmatag, MEMSIZE, 0, LEDMA_BOUNDARY,
360 &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) {
361 aprint_error(": DMA buffer alloc error %d\n",error);
362 goto bad_destroy;
363 }
364
365 /* Map DMA buffer into kernel space */
366 if ((error = bus_dmamem_map(dmatag, &seg, rseg, MEMSIZE,
367 (void **)&sc->sc_mem, BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) {
368 aprint_error(": DMA buffer map error %d\n", error);
369 goto bad_free;
370 }
371
372 /* Load DMA buffer */
373 if ((error = bus_dmamap_load(dmatag, lesc->sc_dmamap, sc->sc_mem,
374 MEMSIZE, NULL, BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) {
375 aprint_error(": DMA buffer map load error %d\n", error);
376 goto bad_unmap;
377 }
378
379 lesc->sc_laddr = lesc->sc_dmamap->dm_segs[0].ds_addr;
380 sc->sc_addr = lesc->sc_laddr & 0xffffff;
381 sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON;
382 lesc->sc_lostcount = 0;
383
384 sc->sc_mediachange = lemediachange;
385 sc->sc_mediastatus = lemediastatus;
386 sc->sc_supmedia = lemedia;
387 sc->sc_nsupmedia = NLEMEDIA;
388 sc->sc_defaultmedia = IFM_ETHER | IFM_AUTO;
389
390 prom_getether(sa->sa_node, sc->sc_enaddr);
391
392 sc->sc_copytodesc = lance_copytobuf_contig;
393 sc->sc_copyfromdesc = lance_copyfrombuf_contig;
394 sc->sc_copytobuf = lance_copytobuf_contig;
395 sc->sc_copyfrombuf = lance_copyfrombuf_contig;
396 sc->sc_zerobuf = lance_zerobuf_contig;
397
398 sc->sc_rdcsr = lerdcsr;
399 sc->sc_wrcsr = lewrcsr;
400 sc->sc_hwinit = lehwinit;
401 sc->sc_nocarrier = lenocarrier;
402 sc->sc_hwreset = lehwreset;
403
404 /* Establish interrupt handler */
405 if (sa->sa_nintr != 0)
406 (void)bus_intr_establish(sa->sa_bustag, sa->sa_pri, IPL_NET,
407 am7990_intr, sc);
408
409 am7990_config(&lesc->sc_am7990);
410
411 /* now initialize DMA */
412 lehwreset(sc);
413
414 return;
415
416 bad_unmap:
417 bus_dmamem_unmap(dmatag, sc->sc_mem, MEMSIZE);
418 bad_free:
419 bus_dmamem_free(dmatag, &seg, rseg);
420 bad_destroy:
421 bus_dmamap_destroy(dmatag, lesc->sc_dmamap);
422 }
423