if_tlp_eisa.c revision 1.29 
1/*	$NetBSD: if_tlp_eisa.c,v 1.29 2021/07/24 18:50:07 thorpej 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 1.29 2021/07/24 18:50:07 thorpej Exp $");
40
41#include "opt_inet.h"
42
43#include <sys/param.h>
44#include <sys/systm.h>
45#include <sys/mbuf.h>
46#include <sys/malloc.h>
47#include <sys/kernel.h>
48#include <sys/socket.h>
49#include <sys/ioctl.h>
50#include <sys/errno.h>
51#include <sys/device.h>
52
53#include <machine/endian.h>
54
55#include <net/if.h>
56#include <net/if_dl.h>
57#include <net/if_media.h>
58#include <net/if_ether.h>
59
60#ifdef INET
61#include <netinet/in.h>
62#include <netinet/if_inarp.h>
63#endif
64
65
66#include <sys/bus.h>
67#include <sys/intr.h>
68
69#include <dev/mii/miivar.h>
70#include <dev/mii/mii_bitbang.h>
71
72#include <dev/ic/tulipreg.h>
73#include <dev/ic/tulipvar.h>
74
75#include <dev/eisa/eisareg.h>
76#include <dev/eisa/eisavar.h>
77#include <dev/eisa/eisadevs.h>
78
79#include <dev/pci/pcireg.h>
80
81/*
82 * DE425 configuration registers; literal offsets from CSR base.
83 * This is effectively the 21040 PCI configuration space interleaved
84 * into the CSR space (CSRs are space 16 bytes on the DE425).
85 *
86 * What a cool address decoder hack they must have on that board...
87 */
88#define	DE425_CFID		0x08	/* Configuration ID */
89#define	DE425_CFCS		0x0c	/* Configuration Command-Status */
90#define	DE425_CFRV		0x18	/* Configuration Revision */
91#define	DE425_CFLT		0x1c	/* Configuration Latency Timer */
92#define	DE425_CBIO		0x28	/* Configuration Base I/O Address */
93#define	DE425_CFDA		0x2c	/* Configuration Driver Area */
94#define	DE425_ENETROM		0xc90	/* Offset in I/O space for ENETROM */
95#define	DE425_CFG0		0xc88	/* IRQ Configuration Register */
96
97struct tulip_eisa_softc {
98	struct tulip_softc sc_tulip;	/* real Tulip softc */
99
100	/* EISA-specific goo. */
101	void	*sc_ih;			/* interrupt handle */
102};
103
104static int	tlp_eisa_match(device_t, cfdata_t, void *);
105static void	tlp_eisa_attach(device_t, device_t, void *);
106
107CFATTACH_DECL_NEW(tlp_eisa, sizeof(struct tulip_eisa_softc),
108    tlp_eisa_match, tlp_eisa_attach, NULL, NULL);
109
110static const int tlp_eisa_irqs[] = { 5, 9, 10, 11 };
111
112struct tulip_eisa_product {
113	const char	*name;	/* device name */
114	tulip_chip_t	chip;	/* base Tulip chip type */
115};
116
117static const struct tulip_eisa_product dec4250 = {
118	.name = "DEC DE425",
119	.chip = TULIP_CHIP_DE425,
120};
121
122static const struct device_compatible_entry compat_data[] = {
123	{ .compat = "DEC4250",		.data = &dec4250 },
124	DEVICE_COMPAT_EOL
125};
126
127static int
128tlp_eisa_match(device_t parent, cfdata_t match,
129    void *aux)
130{
131	struct eisa_attach_args *ea = aux;
132
133	return (eisa_compatible_match(ea, compat_data));
134}
135
136static void
137tlp_eisa_attach(device_t parent, device_t self, void *aux)
138{
139	static const u_int8_t testpat[] =
140	    { 0xff, 0, 0x55, 0xaa, 0xff, 0, 0x55, 0xaa };
141	struct tulip_eisa_softc *esc = device_private(self);
142	struct tulip_softc *sc = &esc->sc_tulip;
143	struct eisa_attach_args *ea = aux;
144	const struct device_compatible_entry *dce;
145	eisa_chipset_tag_t ec = ea->ea_ec;
146	eisa_intr_handle_t ih;
147	bus_space_tag_t iot = ea->ea_iot;
148	bus_space_handle_t ioh;
149	const char *intrstr;
150	const struct tulip_eisa_product *tep;
151	u_int8_t enaddr[ETHER_ADDR_LEN], tmpbuf[sizeof(testpat)];
152	u_int32_t val;
153	int irq, ist, i, cnt;
154	char intrbuf[EISA_INTRSTR_LEN];
155
156	/*
157	 * Map the device.
158	 */
159	if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot),
160	    EISA_SLOT_SIZE, 0, &ioh)) {
161		aprint_error(": unable to map I/O space\n");
162		return;
163	}
164
165	sc->sc_dev = self;
166	sc->sc_st = iot;
167	sc->sc_sh = ioh;
168
169	dce = eisa_compatible_lookup(ea, compat_data);
170	KASSERT(dce != NULL);
171	tep = dce->data;
172
173	sc->sc_chip = tep->chip;
174
175	/*
176	 * DE425's registers are 16 bytes long; the PCI configuration
177	 * space registers are interleaved in the I/O space.
178	 */
179	sc->sc_regshift = 4;
180
181	/*
182	 * No power management hooks.
183	 */
184	sc->sc_flags |= TULIPF_ENABLED;
185
186	/*
187	 * CBIO must map the EISA slot, and I/O access and Bus Mastering
188	 * must be enabled.
189	 */
190	bus_space_write_4(iot, ioh, DE425_CBIO, EISA_SLOT_ADDR(ea->ea_slot));
191	bus_space_write_4(iot, ioh, DE425_CFCS,
192	    bus_space_read_4(iot, ioh, DE425_CFCS) |
193	    PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MASTER_ENABLE);
194
195	/*
196	 * Get revision info.
197	 */
198	sc->sc_rev = bus_space_read_4(iot, ioh, DE425_CFRV) & 0xff;
199
200	aprint_normal(": %s Ethernet, pass %d.%d\n",
201	    tep->name, (sc->sc_rev >> 4) & 0xf, sc->sc_rev & 0xf);
202
203	sc->sc_dmat = ea->ea_dmat;
204
205	/*
206	 * EISA doesn't have a cache line register.
207	 */
208	sc->sc_cacheline = 0;
209
210	/*
211	 * Find the beginning of the Ethernet Address ROM.
212	 */
213	for (i = 0, cnt = 0; i < sizeof(testpat) && cnt < 32; cnt++) {
214		tmpbuf[i] = bus_space_read_1(iot, ioh, DE425_ENETROM);
215		if (tmpbuf[i] == testpat[i])
216			i++;
217		else
218			i = 0;
219	}
220
221	/*
222	 * ...and now read the contents of the Ethernet Address ROM.
223	 */
224	sc->sc_srom = malloc(32, M_DEVBUF, M_WAITOK|M_ZERO);
225	for (i = 0; i < 32; i++)
226		sc->sc_srom[i] = bus_space_read_1(iot, ioh, DE425_ENETROM);
227
228	/*
229	 * None of the DE425 boards have the new-style SROMs.
230	 */
231	if (tlp_parse_old_srom(sc, enaddr) == 0) {
232		aprint_error_dev(self, "unable to decode old-style SROM\n");
233		return;
234	}
235
236	/*
237	 * All DE425 boards use the 21040 media switch.
238	 */
239	sc->sc_mediasw = &tlp_21040_mediasw;
240
241	/*
242	 * Figure out which IRQ we want to use, and determine if it's
243	 * edge- or level-triggered.
244	 */
245	val = bus_space_read_4(iot, ioh, DE425_CFG0);
246	irq = tlp_eisa_irqs[(val >> 1) & 0x03];
247	ist = (val & 0x01) ? IST_EDGE : IST_LEVEL;
248
249	/*
250	 * Map and establish our interrupt.
251	 */
252	if (eisa_intr_map(ec, irq, &ih)) {
253		aprint_error_dev(self, "unable to map interrupt (%u)\n", irq);
254		return;
255	}
256	intrstr = eisa_intr_string(ec, ih, intrbuf, sizeof(intrbuf));
257	esc->sc_ih = eisa_intr_establish(ec, ih, ist, IPL_NET, tlp_intr, sc);
258	if (esc->sc_ih == NULL) {
259		aprint_error_dev(self, "unable to establish interrupt");
260		if (intrstr != NULL)
261			aprint_error(" at %s", intrstr);
262		aprint_error("\n");
263		return;
264	}
265	if (intrstr != NULL) {
266		aprint_normal_dev(self, "interrupting at %s (%s trigger)\n",
267		    ist == IST_EDGE ? "edge" : "level", intrstr);
268	}
269
270	/*
271	 * Finish off the attach.
272	 */
273	tlp_attach(sc, enaddr);
274}
275