1 /* $NetBSD: if_le_ledma.c,v 1.26 2005/12/11 12:23:44 christos Exp $ */
4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
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.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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.
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.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
37 #include <sys/systm.h>
39 #include <sys/endian.h>
40 #include <sys/kernel.h>
42 #include <sys/module.h>
43 #include <sys/mutex.h>
44 #include <sys/resource.h>
46 #include <sys/socket.h>
48 #include <dev/ofw/ofw_bus.h>
50 #include <machine/bus.h>
51 #include <machine/ofw_machdep.h>
52 #include <machine/resource.h>
54 #include <net/ethernet.h>
56 #include <net/if_media.h>
58 #include <sparc64/sbus/lsi64854reg.h>
59 #include <sparc64/sbus/lsi64854var.h>
61 #include <dev/le/lancereg.h>
62 #include <dev/le/lancevar.h>
63 #include <dev/le/am7990var.h>
65 #define LEDMA_ALIGNMENT 8 /* ring desc. alignmet for NCR92C990 */
66 #define LEDMA_BOUNDARY (16*1024*1024) /* must not cross 16MB boundary */
67 #define LEDMA_MEMSIZE (16*1024) /* LANCE memory size */
68 #define LEREG1_RDP 0 /* Register Data Port */
69 #define LEREG1_RAP 2 /* Register Address Port */
72 struct am7990_softc sc_am7990; /* glue to MI code */
74 struct resource *sc_rres;
76 struct resource *sc_ires;
79 bus_dma_tag_t sc_dmat;
81 bus_addr_t sc_laddr; /* LANCE DMA address */
83 struct lsi64854_softc *sc_dma; /* pointer to DMA engine */
86 static device_probe_t le_dma_probe;
87 static device_attach_t le_dma_attach;
88 static device_detach_t le_dma_detach;
89 static device_resume_t le_dma_resume;
90 static device_suspend_t le_dma_suspend;
92 static device_method_t le_dma_methods[] = {
93 /* Device interface */
94 DEVMETHOD(device_probe, le_dma_probe),
95 DEVMETHOD(device_attach, le_dma_attach),
96 DEVMETHOD(device_detach, le_dma_detach),
97 /* We can just use the suspend method here. */
98 DEVMETHOD(device_shutdown, le_dma_suspend),
99 DEVMETHOD(device_suspend, le_dma_suspend),
100 DEVMETHOD(device_resume, le_dma_resume),
105 DEFINE_CLASS_0(le, le_dma_driver, le_dma_methods, sizeof(struct le_dma_softc));
106 DRIVER_MODULE(le, dma, le_dma_driver, le_devclass, 0, 0);
107 MODULE_DEPEND(le, dma, 1, 1, 1);
108 MODULE_DEPEND(le, ether, 1, 1, 1);
111 * Media types supported
113 static const int le_dma_supmedia[] = {
114 IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, 0),
115 IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, 0),
116 IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, 0)
119 static void le_dma_wrcsr(struct lance_softc *, uint16_t, uint16_t);
120 static uint16_t le_dma_rdcsr(struct lance_softc *, uint16_t);
121 static void le_dma_setutp(struct lance_softc *);
122 static void le_dma_setaui(struct lance_softc *);
123 static int le_dma_supmediachange(struct lance_softc *);
124 static void le_dma_supmediastatus(struct lance_softc *, struct ifmediareq *);
125 static void le_dma_hwreset(struct lance_softc *);
126 static int le_dma_hwintr(struct lance_softc *);
127 static void le_dma_nocarrier(struct lance_softc *);
128 static bus_dmamap_callback_t le_dma_dma_callback;
131 le_dma_wrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
133 struct le_dma_softc *lesc = (struct le_dma_softc *)sc;
135 bus_write_2(lesc->sc_rres, LEREG1_RAP, port);
136 bus_barrier(lesc->sc_rres, LEREG1_RAP, 2, BUS_SPACE_BARRIER_WRITE);
137 bus_write_2(lesc->sc_rres, LEREG1_RDP, val);
141 le_dma_rdcsr(struct lance_softc *sc, uint16_t port)
143 struct le_dma_softc *lesc = (struct le_dma_softc *)sc;
145 bus_write_2(lesc->sc_rres, LEREG1_RAP, port);
146 bus_barrier(lesc->sc_rres, LEREG1_RAP, 2, BUS_SPACE_BARRIER_WRITE);
147 return (bus_read_2(lesc->sc_rres, LEREG1_RDP));
151 le_dma_setutp(struct lance_softc *sc)
153 struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma;
155 L64854_SCSR(dma, L64854_GCSR(dma) | E_TP_AUI);
156 DELAY(20000); /* We must not touch the LANCE chip for 20ms. */
160 le_dma_setaui(struct lance_softc *sc)
162 struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma;
164 L64854_SCSR(dma, L64854_GCSR(dma) & ~E_TP_AUI);
165 DELAY(20000); /* We must not touch the LANCE chip for 20ms. */
169 le_dma_supmediachange(struct lance_softc *sc)
171 struct ifmedia *ifm = &sc->sc_media;
173 if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
177 * Switch to the selected media. If autoselect is set, we don't
178 * really have to do anything. We'll switch to the other media
179 * when we detect loss of carrier.
181 switch (IFM_SUBTYPE(ifm->ifm_media)) {
201 le_dma_supmediastatus(struct lance_softc *sc, struct ifmediareq *ifmr)
203 struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma;
206 * Notify the world which media we're currently using.
208 if (L64854_GCSR(dma) & E_TP_AUI)
209 ifmr->ifm_active = IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, 0);
211 ifmr->ifm_active = IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, 0);
215 le_dma_hwreset(struct lance_softc *sc)
217 struct le_dma_softc *lesc = (struct le_dma_softc *)sc;
218 struct lsi64854_softc *dma = lesc->sc_dma;
219 uint32_t aui_bit, csr;
224 csr = L64854_GCSR(dma);
225 aui_bit = csr & E_TP_AUI;
228 /* Write bits 24-31 of Lance address. */
229 bus_write_4(dma->sc_res, L64854_REG_ENBAR,
230 lesc->sc_laddr & 0xff000000);
235 * Disable E-cache invalidates on chip writes.
236 * Retain previous cable selection bit.
238 csr = L64854_GCSR(dma);
239 csr |= (E_DSBL_WR_INVAL | aui_bit);
240 L64854_SCSR(dma, csr);
241 DELAY(20000); /* We must not touch the LANCE chip for 20ms. */
245 le_dma_hwintr(struct lance_softc *sc)
247 struct le_dma_softc *lesc = (struct le_dma_softc *)sc;
248 struct lsi64854_softc *dma = lesc->sc_dma;
250 return (DMA_INTR(dma));
254 le_dma_nocarrier(struct lance_softc *sc)
256 struct le_dma_softc *lesc = (struct le_dma_softc *)sc;
259 * Check if the user has requested a certain cable type, and
260 * if so, honor that request.
263 if (L64854_GCSR(lesc->sc_dma) & E_TP_AUI) {
264 switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) {
267 if_printf(sc->sc_ifp, "lost carrier on UTP port, "
268 "switching to AUI port\n");
272 switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) {
275 if_printf(sc->sc_ifp, "lost carrier on AUI port, "
276 "switching to UTP port\n");
283 le_dma_dma_callback(void *xsc, bus_dma_segment_t *segs, int nsegs, int error)
285 struct le_dma_softc *lesc = (struct le_dma_softc *)xsc;
289 KASSERT(nsegs == 1, ("%s: bad DMA segment count", __func__));
290 lesc->sc_laddr = segs[0].ds_addr;
294 le_dma_probe(device_t dev)
297 if (strcmp(ofw_bus_get_name(dev), "le") == 0) {
298 device_set_desc(dev, "LANCE Ethernet");
299 return (BUS_PROBE_DEFAULT);
305 le_dma_attach(device_t dev)
307 struct le_dma_softc *lesc;
308 struct lsi64854_softc *dma;
309 struct lance_softc *sc;
312 lesc = device_get_softc(dev);
313 sc = &lesc->sc_am7990.lsc;
315 LE_LOCK_INIT(sc, device_get_nameunit(dev));
318 * Establish link to `ledma' device.
321 dma = (struct lsi64854_softc *)device_get_softc(device_get_parent(dev));
323 lesc->sc_dma->sc_client = lesc;
326 lesc->sc_rres = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
328 if (lesc->sc_rres == NULL) {
329 device_printf(dev, "cannot allocate registers\n");
335 if ((lesc->sc_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ,
336 &i, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
337 device_printf(dev, "cannot allocate interrupt\n");
342 /* Attach the DMA engine. */
343 error = lsi64854_attach(dma);
345 device_printf(dev, "lsi64854_attach failed\n");
349 sc->sc_memsize = LEDMA_MEMSIZE;
350 error = bus_dma_tag_create(
351 dma->sc_parent_dmat, /* parent */
352 LEDMA_ALIGNMENT, /* alignment */
353 LEDMA_BOUNDARY, /* boundary */
354 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
355 BUS_SPACE_MAXADDR, /* highaddr */
356 NULL, NULL, /* filter, filterarg */
357 sc->sc_memsize, /* maxsize */
359 sc->sc_memsize, /* maxsegsize */
361 NULL, NULL, /* lockfunc, lockarg */
364 device_printf(dev, "cannot allocate buffer DMA tag\n");
368 error = bus_dmamem_alloc(lesc->sc_dmat, (void **)&sc->sc_mem,
369 BUS_DMA_WAITOK | BUS_DMA_COHERENT, &lesc->sc_dmam);
371 device_printf(dev, "cannot allocate DMA buffer memory\n");
376 error = bus_dmamap_load(lesc->sc_dmat, lesc->sc_dmam, sc->sc_mem,
377 sc->sc_memsize, le_dma_dma_callback, lesc, 0);
378 if (error != 0 || lesc->sc_laddr == 0) {
379 device_printf(dev, "cannot load DMA buffer map\n");
383 sc->sc_addr = lesc->sc_laddr & 0xffffff;
385 sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON;
387 sc->sc_mediachange = le_dma_supmediachange;
388 sc->sc_mediastatus = le_dma_supmediastatus;
389 sc->sc_supmedia = le_dma_supmedia;
390 sc->sc_nsupmedia = sizeof(le_dma_supmedia) / sizeof(le_dma_supmedia[0]);
391 sc->sc_defaultmedia = le_dma_supmedia[0];
393 OF_getetheraddr(dev, sc->sc_enaddr);
395 sc->sc_copytodesc = lance_copytobuf_contig;
396 sc->sc_copyfromdesc = lance_copyfrombuf_contig;
397 sc->sc_copytobuf = lance_copytobuf_contig;
398 sc->sc_copyfrombuf = lance_copyfrombuf_contig;
399 sc->sc_zerobuf = lance_zerobuf_contig;
401 sc->sc_rdcsr = le_dma_rdcsr;
402 sc->sc_wrcsr = le_dma_wrcsr;
403 sc->sc_hwreset = le_dma_hwreset;
404 sc->sc_hwintr = le_dma_hwintr;
405 sc->sc_nocarrier = le_dma_nocarrier;
407 error = am7990_config(&lesc->sc_am7990, device_get_name(dev),
408 device_get_unit(dev));
410 device_printf(dev, "cannot attach Am7990\n");
414 error = bus_setup_intr(dev, lesc->sc_ires, INTR_TYPE_NET | INTR_MPSAFE,
415 NULL, am7990_intr, sc, &lesc->sc_ih);
417 device_printf(dev, "cannot set up interrupt\n");
424 am7990_detach(&lesc->sc_am7990);
426 bus_dmamap_unload(lesc->sc_dmat, lesc->sc_dmam);
428 bus_dmamem_free(lesc->sc_dmat, sc->sc_mem, lesc->sc_dmam);
430 bus_dma_tag_destroy(lesc->sc_dmat);
432 lsi64854_detach(dma);
434 bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(lesc->sc_ires),
437 bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(lesc->sc_rres),
445 le_dma_detach(device_t dev)
447 struct le_dma_softc *lesc;
448 struct lance_softc *sc;
451 lesc = device_get_softc(dev);
452 sc = &lesc->sc_am7990.lsc;
454 bus_teardown_intr(dev, lesc->sc_ires, lesc->sc_ih);
455 am7990_detach(&lesc->sc_am7990);
456 bus_dmamap_unload(lesc->sc_dmat, lesc->sc_dmam);
457 bus_dmamem_free(lesc->sc_dmat, sc->sc_mem, lesc->sc_dmam);
458 bus_dma_tag_destroy(lesc->sc_dmat);
459 error = lsi64854_detach(lesc->sc_dma);
462 bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(lesc->sc_ires),
464 bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(lesc->sc_rres),
472 le_dma_suspend(device_t dev)
474 struct le_dma_softc *lesc;
476 lesc = device_get_softc(dev);
478 lance_suspend(&lesc->sc_am7990.lsc);
484 le_dma_resume(device_t dev)
486 struct le_dma_softc *lesc;
488 lesc = device_get_softc(dev);
490 lance_resume(&lesc->sc_am7990.lsc);