if_sn_jazzio.c revision 1.14 
1/*	$NetBSD: if_sn_jazzio.c,v 1.14 2021/02/20 09:36:30 rin Exp $	*/
2
3/*-
4 * Copyright (c) 2001 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.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * Microsoft JAZZ front-end for for the National Semiconductor DP83932
34 * Systems-Oriented Network Interface Controller (SONIC).
35 */
36
37#include <sys/cdefs.h>
38__KERNEL_RCSID(0, "$NetBSD: if_sn_jazzio.c,v 1.14 2021/02/20 09:36:30 rin Exp $");
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/mbuf.h>
43#include <sys/malloc.h>
44#include <sys/kernel.h>
45#include <sys/socket.h>
46#include <sys/ioctl.h>
47#include <sys/errno.h>
48#include <sys/device.h>
49#include <sys/kcore.h>
50
51#include <sys/rndsource.h>
52
53#include <net/if.h>
54#include <net/if_dl.h>
55#include <net/if_ether.h>
56
57#include <machine/autoconf.h>
58#include <sys/bus.h>
59#include <machine/intr.h>
60
61#include <dev/ic/dp83932reg.h>
62#include <dev/ic/dp83932var.h>
63
64#include <arc/arc/arcbios.h>
65#include <arc/jazz/jazziovar.h>
66
67int	sonic_jazzio_match(device_t, cfdata_t, void *);
68void	sonic_jazzio_attach(device_t, device_t, void *);
69
70CFATTACH_DECL_NEW(sn_jazzio, sizeof(struct sonic_softc),
71    sonic_jazzio_match, sonic_jazzio_attach, NULL, NULL);
72
73int
74sonic_jazzio_match(device_t parent, cfdata_t cf, void *aux)
75{
76	struct jazzio_attach_args *ja = aux;
77
78	if (strcmp(ja->ja_name, "SONIC") != 0)
79		return 0;
80
81	return 1;
82}
83
84void
85sonic_jazzio_attach(device_t parent, device_t self, void *aux)
86{
87	struct sonic_softc *sc = device_private(self);
88	struct jazzio_attach_args *ja = aux;
89	int i;
90	uint8_t enaddr[ETHER_ADDR_LEN];
91
92	sc->sc_dev = self;
93	sc->sc_st = ja->ja_bust;
94	sc->sc_dmat = ja->ja_dmat;
95
96	aprint_normal(": SONIC Ethernet\n");
97
98	/* Map the device. */
99	if (bus_space_map(sc->sc_st, ja->ja_addr, SONIC_NREGS * 4,
100	    0, &sc->sc_sh) != 0) {
101		aprint_error_dev(sc->sc_dev, "unable to map SONIC registers\n");
102		return;
103	}
104
105	/* We run in 32-bit mode. */
106	sc->sc_32bit = 1;
107
108	/* BMODE is set for little-endian. */
109	sc->sc_bigendian = 0;
110
111	/* Regs are 16-bit, plus 16-bit pad. */
112	for (i = 0; i < SONIC_NREGS; i++)
113		sc->sc_regmap[i] = i * 4;
114
115	/*
116	 * Configure DCR:
117	 *
118	 *	- Latched bug retry
119	 *	- Synchronous bus (memory cycle 2 clocks)
120	 *	- 0 wait states added (WC0,WC1 == 0,0)
121	 *	- 4 byte Rx DMA threshold (RFT0,RFT1 == 0,0)
122	 *	- 28 byte Tx DMA threshold (TFT0,TFT1 == 1,1)
123	 *	  XXX There was a comment
124	 *	  	"XXX RFT & TFT according to MIPS manual"
125	 *	      in old MD sys/arch/arc/dev/if_sn.c in Attic.
126	 */
127	sc->sc_dcr = DCR_LBR | DCR_SBUS | DCR_TFT0 | DCR_TFT1;
128	sc->sc_dcr2 = 0;
129
130	/* Hook up our interrupt handler. */
131	jazzio_intr_establish(ja->ja_intr, sonic_intr, sc);
132
133	/* The Ethernet address is from the product ID. */
134	memcpy(enaddr, arc_product_id, sizeof(enaddr));
135
136	/* Finish off the attach. */
137	sonic_attach(sc, enaddr);
138}
139