1/*	$NetBSD: if_le_ledma.c,v 1.34 2009/09/17 16:28:12 tsutsui 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 1.34 2009/09/17 16:28:12 tsutsui 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#include <sys/malloc.h>
45
46#include <net/if.h>
47#include <net/if_ether.h>
48#include <net/if_media.h>
49
50#ifdef INET
51#include <netinet/in.h>
52#include <netinet/if_inarp.h>
53#endif
54
55#include <sys/bus.h>
56#include <sys/intr.h>
57#include <machine/autoconf.h>
58
59#include <dev/sbus/sbusvar.h>
60
61#include <dev/ic/lsi64854reg.h>
62#include <dev/ic/lsi64854var.h>
63
64#include <dev/ic/lancereg.h>
65#include <dev/ic/lancevar.h>
66#include <dev/ic/am7990reg.h>
67#include <dev/ic/am7990var.h>
68
69#include "ioconf.h"
70
71/*
72 * LANCE registers.
73 */
74#define LEREG1_RDP	0	/* Register Data port */
75#define LEREG1_RAP	2	/* Register Address port */
76
77struct	le_softc {
78	struct	am7990_softc	sc_am7990;	/* glue to MI code */
79	bus_space_tag_t		sc_bustag;
80	bus_dmamap_t		sc_dmamap;
81	bus_space_handle_t	sc_reg;		/* LANCE registers */
82	struct	lsi64854_softc	*sc_dma;	/* pointer to my dma */
83	u_int			sc_laddr;	/* LANCE DMA address */
84	u_int			sc_lostcount;
85#define LE_LOSTTHRESH	5	/* lost carrior count to switch media */
86};
87
88#define MEMSIZE		(16*1024)	/* LANCE memory size */
89#define LEDMA_BOUNDARY	(16*1024*1024)	/* must not cross 16MB boundary */
90
91int	lematch_ledma(device_t, cfdata_t, void *);
92void	leattach_ledma(device_t, device_t, void *);
93
94/*
95 * Media types supported by the Sun4m.
96 */
97static int lemedia[] = {
98	IFM_ETHER|IFM_10_T,
99	IFM_ETHER|IFM_10_5,
100	IFM_ETHER|IFM_AUTO,
101};
102#define NLEMEDIA	__arraycount(lemedia)
103
104void	lesetutp(struct lance_softc *);
105void	lesetaui(struct lance_softc *);
106
107int	lemediachange(struct lance_softc *);
108void	lemediastatus(struct lance_softc *, struct ifmediareq *);
109
110CFATTACH_DECL_NEW(le_ledma, sizeof(struct le_softc),
111    lematch_ledma, leattach_ledma, NULL, NULL);
112
113#if defined(_KERNEL_OPT)
114#include "opt_ddb.h"
115#endif
116
117static void lewrcsr(struct lance_softc *, uint16_t, uint16_t);
118static uint16_t lerdcsr(struct lance_softc *, uint16_t);
119static void lehwreset(struct lance_softc *);
120static void lehwinit(struct lance_softc *);
121static void lenocarrier(struct lance_softc *);
122
123static void
124lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
125{
126	struct le_softc *lesc = (struct le_softc *)sc;
127	bus_space_tag_t t = lesc->sc_bustag;
128	bus_space_handle_t h = lesc->sc_reg;
129
130	bus_space_write_2(t, h, LEREG1_RAP, port);
131	bus_space_write_2(t, h, LEREG1_RDP, val);
132
133#if defined(SUN4M)
134	/*
135	 * We need to flush the Sbus->Mbus write buffers. This can most
136	 * easily be accomplished by reading back the register that we
137	 * just wrote (thanks to Chris Torek for this solution).
138	 */
139	(void)bus_space_read_2(t, h, LEREG1_RDP);
140#endif
141}
142
143static uint16_t
144lerdcsr(struct lance_softc *sc, uint16_t port)
145{
146	struct le_softc *lesc = (struct le_softc *)sc;
147	bus_space_tag_t t = lesc->sc_bustag;
148	bus_space_handle_t h = lesc->sc_reg;
149
150	bus_space_write_2(t, h, LEREG1_RAP, port);
151	return (bus_space_read_2(t, h, LEREG1_RDP));
152}
153
154void
155lesetutp(struct lance_softc *sc)
156{
157	struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma;
158	uint32_t csr;
159
160	csr = L64854_GCSR(dma);
161	csr |= E_TP_AUI;
162	L64854_SCSR(dma, csr);
163	delay(20000);	/* must not touch le for 20ms */
164}
165
166void
167lesetaui(struct lance_softc *sc)
168{
169	struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma;
170	uint32_t csr;
171
172	csr = L64854_GCSR(dma);
173	csr &= ~E_TP_AUI;
174	L64854_SCSR(dma, csr);
175	delay(20000);	/* must not touch le for 20ms */
176}
177
178int
179lemediachange(struct lance_softc *sc)
180{
181	struct ifmedia *ifm = &sc->sc_media;
182
183	if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
184		return (EINVAL);
185
186	/*
187	 * Switch to the selected media.  If autoselect is
188	 * set, we don't really have to do anything.  We'll
189	 * switch to the other media when we detect loss of
190	 * carrier.
191	 */
192	switch (IFM_SUBTYPE(ifm->ifm_media)) {
193	case IFM_10_T:
194		lesetutp(sc);
195		break;
196
197	case IFM_10_5:
198		lesetaui(sc);
199		break;
200
201	case IFM_AUTO:
202		break;
203
204	default:
205		return (EINVAL);
206	}
207
208	return (0);
209}
210
211void
212lemediastatus(struct lance_softc *sc, struct ifmediareq *ifmr)
213{
214	struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma;
215
216	/*
217	 * Notify the world which media we're currently using.
218	 */
219	if (L64854_GCSR(dma) & E_TP_AUI)
220		ifmr->ifm_active = IFM_ETHER|IFM_10_T;
221	else
222		ifmr->ifm_active = IFM_ETHER|IFM_10_5;
223}
224
225static void
226lehwreset(struct lance_softc *sc)
227{
228	struct le_softc *lesc = (struct le_softc *)sc;
229	struct lsi64854_softc *dma = lesc->sc_dma;
230	uint32_t csr;
231	u_int aui_bit;
232
233	/*
234	 * Reset DMA channel.
235	 */
236	csr = L64854_GCSR(dma);
237	aui_bit = csr & E_TP_AUI;
238	DMA_RESET(dma);
239
240	/* Write bits 24-31 of Lance address */
241	bus_space_write_4(dma->sc_bustag, dma->sc_regs, L64854_REG_ENBAR,
242			  lesc->sc_laddr & 0xff000000);
243
244	DMA_ENINTR(dma);
245
246	/*
247	 * Disable E-cache invalidates on chip writes.
248	 * Retain previous cable selection bit.
249	 */
250	csr = L64854_GCSR(dma);
251	csr |= (E_DSBL_WR_INVAL | aui_bit);
252	L64854_SCSR(dma, csr);
253	delay(20000);	/* must not touch le for 20ms */
254}
255
256static void
257lehwinit(struct lance_softc *sc)
258{
259
260	/*
261	 * Make sure we're using the currently-enabled media type.
262	 * XXX Actually, this is probably unnecessary, now.
263	 */
264	switch (IFM_SUBTYPE(sc->sc_media.ifm_cur->ifm_media)) {
265	case IFM_10_T:
266		lesetutp(sc);
267		break;
268
269	case IFM_10_5:
270		lesetaui(sc);
271		break;
272	}
273}
274
275static void
276lenocarrier(struct lance_softc *sc)
277{
278	struct le_softc *lesc = (struct le_softc *)sc;
279
280	/* it may take a while for modern switches to set 10baseT media */
281	if (lesc->sc_lostcount++ < LE_LOSTTHRESH)
282		return;
283
284	lesc->sc_lostcount = 0;
285
286	/*
287	 * Check if the user has requested a certain cable type, and
288	 * if so, honor that request.
289	 */
290	printf("%s: lost carrier on ", device_xname(sc->sc_dev));
291
292	if (L64854_GCSR(lesc->sc_dma) & E_TP_AUI) {
293		printf("UTP port");
294		switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) {
295		case IFM_10_5:
296		case IFM_AUTO:
297			printf(", switching to AUI port");
298			lesetaui(sc);
299		}
300	} else {
301		printf("AUI port");
302		switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) {
303		case IFM_10_T:
304		case IFM_AUTO:
305			printf(", switching to UTP port");
306			lesetutp(sc);
307		}
308	}
309	printf("\n");
310}
311
312int
313lematch_ledma(device_t parent, cfdata_t cf, void *aux)
314{
315	struct sbus_attach_args *sa = aux;
316
317	return (strcmp(cf->cf_name, sa->sa_name) == 0);
318}
319
320
321void
322leattach_ledma(device_t parent, device_t self, void *aux)
323{
324	struct le_softc *lesc = device_private(self);
325	struct lance_softc *sc = &lesc->sc_am7990.lsc;
326	struct lsi64854_softc *lsi = device_private(parent);
327	struct sbus_attach_args *sa = aux;
328	bus_dma_tag_t dmatag = sa->sa_dmatag;
329	bus_dma_segment_t seg;
330	int rseg, error;
331
332	sc->sc_dev = self;
333	lesc->sc_bustag = sa->sa_bustag;
334
335	/* Establish link to `ledma' device */
336	lesc->sc_dma = lsi;
337	lesc->sc_dma->sc_client = lesc;
338
339	/* Map device registers */
340	if (sbus_bus_map(sa->sa_bustag,
341			 sa->sa_slot,
342			 sa->sa_offset,
343			 sa->sa_size,
344			 0, &lesc->sc_reg) != 0) {
345		aprint_error(": cannot map registers\n");
346		return;
347	}
348
349	/* Allocate buffer memory */
350	sc->sc_memsize = MEMSIZE;
351
352	/* Get a DMA handle */
353	if ((error = bus_dmamap_create(dmatag, MEMSIZE, 1, MEMSIZE,
354					LEDMA_BOUNDARY, BUS_DMA_NOWAIT,
355					&lesc->sc_dmamap)) != 0) {
356		aprint_error(": DMA map create error %d\n", error);
357		return;
358	}
359
360	/* Allocate DMA buffer */
361	if ((error = bus_dmamem_alloc(dmatag, MEMSIZE, 0, LEDMA_BOUNDARY,
362				 &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) {
363		aprint_error(": DMA buffer alloc error %d\n",error);
364		return;
365	}
366
367	/* Map DMA buffer into kernel space */
368	if ((error = bus_dmamem_map(dmatag, &seg, rseg, MEMSIZE,
369			       (void **)&sc->sc_mem,
370			       BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) {
371		aprint_error(": DMA buffer map error %d\n", error);
372		bus_dmamem_free(dmatag, &seg, rseg);
373		return;
374	}
375
376	/* Load DMA buffer */
377	if ((error = bus_dmamap_load(dmatag, lesc->sc_dmamap, sc->sc_mem,
378			MEMSIZE, NULL, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) {
379		aprint_error(": DMA buffer map load error %d\n", error);
380		bus_dmamem_free(dmatag, &seg, rseg);
381		bus_dmamem_unmap(dmatag, sc->sc_mem, MEMSIZE);
382		return;
383	}
384
385	lesc->sc_laddr = lesc->sc_dmamap->dm_segs[0].ds_addr;
386	sc->sc_addr = lesc->sc_laddr & 0xffffff;
387	sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON;
388	lesc->sc_lostcount = 0;
389
390	sc->sc_mediachange = lemediachange;
391	sc->sc_mediastatus = lemediastatus;
392	sc->sc_supmedia = lemedia;
393	sc->sc_nsupmedia = NLEMEDIA;
394	sc->sc_defaultmedia = IFM_ETHER|IFM_AUTO;
395
396	prom_getether(sa->sa_node, sc->sc_enaddr);
397
398	sc->sc_copytodesc = lance_copytobuf_contig;
399	sc->sc_copyfromdesc = lance_copyfrombuf_contig;
400	sc->sc_copytobuf = lance_copytobuf_contig;
401	sc->sc_copyfrombuf = lance_copyfrombuf_contig;
402	sc->sc_zerobuf = lance_zerobuf_contig;
403
404	sc->sc_rdcsr = lerdcsr;
405	sc->sc_wrcsr = lewrcsr;
406	sc->sc_hwinit = lehwinit;
407	sc->sc_nocarrier = lenocarrier;
408	sc->sc_hwreset = lehwreset;
409
410	/* Establish interrupt handler */
411	if (sa->sa_nintr != 0)
412		(void)bus_intr_establish(sa->sa_bustag, sa->sa_pri, IPL_NET,
413					 am7990_intr, sc);
414
415	am7990_config(&lesc->sc_am7990);
416
417	/* now initialize DMA */
418	lehwreset(sc);
419}
420