if_tlp_eisa.c revision 1.21 
1/*	$NetBSD: if_tlp_eisa.c,v 1.21 2008/04/28 20:23:48 martin Exp $	*/
2
3/*-
4 * Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9 * NASA Ames Research Center.
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/*
34 * EISA bus front-end for the Digital Semiconductor ``Tulip'' (21x4x)
35 * Ethernet controller family driver.
36 */
37
38#include <sys/cdefs.h>
39__KERNEL_RCSID(0, "$NetBSD: if_tlp_eisa.c,v 1.21 2008/04/28 20:23:48 martin Exp $");
40
41#include "opt_inet.h"
42#include "bpfilter.h"
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/mbuf.h>
47#include <sys/malloc.h>
48#include <sys/kernel.h>
49#include <sys/socket.h>
50#include <sys/ioctl.h>
51#include <sys/errno.h>
52#include <sys/device.h>
53
54#include <machine/endian.h>
55
56#include <net/if.h>
57#include <net/if_dl.h>
58#include <net/if_media.h>
59#include <net/if_ether.h>
60
61#if NBPFILTER > 0
62#include <net/bpf.h>
63#endif
64
65#ifdef INET
66#include <netinet/in.h>
67#include <netinet/if_inarp.h>
68#endif
69
70
71#include <sys/bus.h>
72#include <sys/intr.h>
73
74#include <dev/mii/miivar.h>
75#include <dev/mii/mii_bitbang.h>
76
77#include <dev/ic/tulipreg.h>
78#include <dev/ic/tulipvar.h>
79
80#include <dev/eisa/eisareg.h>
81#include <dev/eisa/eisavar.h>
82#include <dev/eisa/eisadevs.h>
83
84#include <dev/pci/pcireg.h>
85
86/*
87 * DE425 configuration registers; literal offsets from CSR base.
88 * This is effectively the 21040 PCI configuration space interleaved
89 * into the CSR space (CSRs are space 16 bytes on the DE425).
90 *
91 * What a cool address decoder hack they must have on that board...
92 */
93#define	DE425_CFID		0x08	/* Configuration ID */
94#define	DE425_CFCS		0x0c	/* Configuration Command-Status */
95#define	DE425_CFRV		0x18	/* Configuration Revision */
96#define	DE425_CFLT		0x1c	/* Configuration Latency Timer */
97#define	DE425_CBIO		0x28	/* Configuration Base I/O Address */
98#define	DE425_CFDA		0x2c	/* Configuration Driver Area */
99#define	DE425_ENETROM		0xc90	/* Offset in I/O space for ENETROM */
100#define	DE425_CFG0		0xc88	/* IRQ Configuration Register */
101
102struct tulip_eisa_softc {
103	struct tulip_softc sc_tulip;	/* real Tulip softc */
104
105	/* EISA-specific goo. */
106	void	*sc_ih;			/* interrupt handle */
107};
108
109static int	tlp_eisa_match(struct device *, struct cfdata *, void *);
110static void	tlp_eisa_attach(struct device *, struct device *, void *);
111
112CFATTACH_DECL(tlp_eisa, sizeof(struct tulip_eisa_softc),
113    tlp_eisa_match, tlp_eisa_attach, NULL, NULL);
114
115static const int tlp_eisa_irqs[] = { 5, 9, 10, 11 };
116
117static const struct tulip_eisa_product {
118	const char	*tep_eisaid;	/* EISA ID */
119	const char	*tep_name;	/* device name */
120	tulip_chip_t	tep_chip;	/* base Tulip chip type */
121} tlp_eisa_products[] = {
122	{ "DEC4250",			"DEC DE425",
123	  TULIP_CHIP_DE425 },
124
125	{ NULL,				NULL,
126	  TULIP_CHIP_INVALID },
127};
128
129static const struct tulip_eisa_product *
130tlp_eisa_lookup(const struct eisa_attach_args *ea)
131{
132	const struct tulip_eisa_product *tep;
133
134	for (tep = tlp_eisa_products;
135	     tep->tep_chip != TULIP_CHIP_INVALID; tep++)
136		if (strcmp(ea->ea_idstring, tep->tep_eisaid) == 0)
137			return (tep);
138	return (NULL);
139}
140
141static int
142tlp_eisa_match(struct device *parent, struct cfdata *match,
143    void *aux)
144{
145	struct eisa_attach_args *ea = aux;
146
147	if (tlp_eisa_lookup(ea) != NULL)
148		return (1);
149
150	return (0);
151}
152
153static void
154tlp_eisa_attach(struct device *parent, struct device *self, void *aux)
155{
156	static const u_int8_t testpat[] =
157	    { 0xff, 0, 0x55, 0xaa, 0xff, 0, 0x55, 0xaa };
158	struct tulip_eisa_softc *esc = device_private(self);
159	struct tulip_softc *sc = &esc->sc_tulip;
160	struct eisa_attach_args *ea = aux;
161	eisa_chipset_tag_t ec = ea->ea_ec;
162	eisa_intr_handle_t ih;
163	bus_space_tag_t iot = ea->ea_iot;
164	bus_space_handle_t ioh;
165	const char *intrstr;
166	const struct tulip_eisa_product *tep;
167	u_int8_t enaddr[ETHER_ADDR_LEN], tmpbuf[sizeof(testpat)];
168	u_int32_t val;
169	int irq, i, cnt;
170
171	/*
172	 * Map the device.
173	 */
174	if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot),
175	    EISA_SLOT_SIZE, 0, &ioh)) {
176		printf(": unable to map I/O space\n");
177		return;
178	}
179
180	sc->sc_st = iot;
181	sc->sc_sh = ioh;
182
183	tep = tlp_eisa_lookup(ea);
184	if (tep == NULL) {
185		printf("\n");
186		panic("tlp_eisa_attach: impossible");
187	}
188	sc->sc_chip = tep->tep_chip;
189
190	/*
191	 * DE425's registers are 16 bytes long; the PCI configuration
192	 * space registers are interleaved in the I/O space.
193	 */
194	sc->sc_regshift = 4;
195
196	/*
197	 * No power management hooks.
198	 */
199	sc->sc_flags |= TULIPF_ENABLED;
200
201	/*
202	 * CBIO must map the EISA slot, and I/O access and Bus Mastering
203	 * must be enabled.
204	 */
205	bus_space_write_4(iot, ioh, DE425_CBIO, EISA_SLOT_ADDR(ea->ea_slot));
206	bus_space_write_4(iot, ioh, DE425_CFCS,
207	    bus_space_read_4(iot, ioh, DE425_CFCS) |
208	    PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MASTER_ENABLE);
209
210	/*
211	 * Get revision info.
212	 */
213	sc->sc_rev = bus_space_read_4(iot, ioh, DE425_CFRV) & 0xff;
214
215	printf(": %s Ethernet, pass %d.%d\n",
216	    tep->tep_name, (sc->sc_rev >> 4) & 0xf, sc->sc_rev & 0xf);
217
218	sc->sc_dmat = ea->ea_dmat;
219
220	/*
221	 * EISA doesn't have a cache line register.
222	 */
223	sc->sc_cacheline = 0;
224
225	/*
226	 * Find the beginning of the Ethernet Address ROM.
227	 */
228	for (i = 0, cnt = 0; i < sizeof(testpat) && cnt < 32; cnt++) {
229		tmpbuf[i] = bus_space_read_1(iot, ioh, DE425_ENETROM);
230		if (tmpbuf[i] == testpat[i])
231			i++;
232		else
233			i = 0;
234	}
235
236	/*
237	 * ...and now read the contents of the Ethernet Address ROM.
238	 */
239	sc->sc_srom = malloc(32, M_DEVBUF, M_WAITOK|M_ZERO);
240	for (i = 0; i < 32; i++)
241		sc->sc_srom[i] = bus_space_read_1(iot, ioh, DE425_ENETROM);
242
243	/*
244	 * None of the DE425 boards have the new-style SROMs.
245	 */
246	if (tlp_parse_old_srom(sc, enaddr) == 0) {
247		aprint_error_dev(&sc->sc_dev, "unable to decode old-style SROM\n");
248		return;
249	}
250
251	/*
252	 * All DE425 boards use the 21040 media switch.
253	 */
254	sc->sc_mediasw = &tlp_21040_mediasw;
255
256	/*
257	 * Figure out which IRQ we want to use, and determine of it's
258	 * edge- or level-triggered.
259	 */
260	val = bus_space_read_4(iot, ioh, DE425_CFG0);
261	irq = tlp_eisa_irqs[(val >> 1) & 0x03];
262
263	/*
264	 * Map and establish our interrupt.
265	 */
266	if (eisa_intr_map(ec, irq, &ih)) {
267		aprint_error_dev(&sc->sc_dev, "unable to map interrupt (%u)\n",
268		    irq);
269		return;
270	}
271	intrstr = eisa_intr_string(ec, ih);
272	esc->sc_ih = eisa_intr_establish(ec, ih,
273	    (val & 0x01) ? IST_EDGE : IST_LEVEL, IPL_NET, tlp_intr, sc);
274	if (esc->sc_ih == NULL) {
275		aprint_error_dev(&sc->sc_dev, "unable to establish interrupt");
276		if (intrstr != NULL)
277			printf(" at %s", intrstr);
278		printf("\n");
279		return;
280	}
281	if (intrstr != NULL)
282		printf("%s: interrupting at %s\n", device_xname(&sc->sc_dev),
283		    intrstr);
284
285	/*
286	 * Finish off the attach.
287	 */
288	tlp_attach(sc, enaddr);
289}
290