1 /* $NetBSD: if_le_obio.c,v 1.29 2022/05/29 10:45:05 rin 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_obio.c,v 1.29 2022/05/29 10:45:05 rin Exp $");
35
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/device.h>
39
40 #include <uvm/uvm_extern.h>
41
42 #include <net/if.h>
43 #include <net/if_ether.h>
44 #include <net/if_media.h>
45
46 #include <sys/bus.h>
47 #include <machine/intr.h>
48 #include <machine/autoconf.h>
49
50 #include <dev/ic/lancereg.h>
51 #include <dev/ic/lancevar.h>
52 #include <dev/ic/am7990reg.h>
53 #include <dev/ic/am7990var.h>
54
55 /*
56 * LANCE registers.
57 */
58 #define LEREG1_RDP 0 /* Register Data port */
59 #define LEREG1_RAP 2 /* Register Address port */
60
61 struct le_softc {
62 struct am7990_softc sc_am7990; /* glue to MI code */
63 bus_space_tag_t sc_bustag;
64 bus_dma_tag_t sc_dmatag;
65 bus_dmamap_t sc_dmamap;
66 bus_space_handle_t sc_reg; /* LANCE registers */
67 };
68
69 #define MEMSIZE 0x4000 /* LANCE memory size */
70
71 /*
72 * Media types supported.
73 */
74 static int lemedia[] = {
75 IFM_ETHER | IFM_10_T,
76 };
77 #define NLEMEDIA __arraycount(lemedia)
78
79 static int lematch_obio(device_t, cfdata_t, void *);
80 static void leattach_obio(device_t, device_t, void *);
81
82 CFATTACH_DECL_NEW(le_obio, sizeof(struct le_softc),
83 lematch_obio, leattach_obio, NULL, NULL);
84
85
86 static void lewrcsr(struct lance_softc *, uint16_t, uint16_t);
87 static uint16_t lerdcsr(struct lance_softc *, uint16_t);
88
89 static void
lewrcsr(struct lance_softc * sc,uint16_t port,uint16_t val)90 lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
91 {
92 struct le_softc *lesc = (struct le_softc *)sc;
93 bus_space_tag_t t = lesc->sc_bustag;
94 bus_space_handle_t h = lesc->sc_reg;
95
96 bus_space_write_2(t, h, LEREG1_RAP, port);
97 bus_space_write_2(t, h, LEREG1_RDP, val);
98 }
99
100 static uint16_t
lerdcsr(struct lance_softc * sc,uint16_t port)101 lerdcsr(struct lance_softc *sc, uint16_t port)
102 {
103 struct le_softc *lesc = (struct le_softc *)sc;
104 bus_space_tag_t t = lesc->sc_bustag;
105 bus_space_handle_t h = lesc->sc_reg;
106
107 bus_space_write_2(t, h, LEREG1_RAP, port);
108 return bus_space_read_2(t, h, LEREG1_RDP);
109 }
110
111 static int
lematch_obio(device_t parent,cfdata_t cf,void * aux)112 lematch_obio(device_t parent, cfdata_t cf, void *aux)
113 {
114 union obio_attach_args *uoba = aux;
115 struct obio4_attach_args *oba;
116
117 if (uoba->uoba_isobio4 == 0)
118 return 0;
119
120 oba = &uoba->uoba_oba4;
121 return bus_space_probe(oba->oba_bustag, oba->oba_paddr,
122 2, /* probe size */
123 0, /* offset */
124 0, /* flags */
125 NULL, NULL);
126 }
127
128 static void
leattach_obio(device_t parent,device_t self,void * aux)129 leattach_obio(device_t parent, device_t self, void *aux)
130 {
131 union obio_attach_args *uoba = aux;
132 struct obio4_attach_args *oba = &uoba->uoba_oba4;
133 struct le_softc *lesc = device_private(self);
134 struct lance_softc *sc = &lesc->sc_am7990.lsc;
135 bus_dma_segment_t seg;
136 bus_dma_tag_t dmatag;
137 int rseg;
138 int error;
139
140 sc->sc_dev = self;
141 lesc->sc_bustag = oba->oba_bustag;
142 lesc->sc_dmatag = dmatag = oba->oba_dmatag;
143
144 if (bus_space_map(oba->oba_bustag, oba->oba_paddr,
145 2 * sizeof(uint16_t), 0, &lesc->sc_reg) != 0) {
146 aprint_error(": cannot map registers\n");
147 return;
148 }
149
150 /* Get a DMA handle */
151 if ((error = bus_dmamap_create(dmatag, MEMSIZE, 1, MEMSIZE, 0,
152 BUS_DMA_NOWAIT|BUS_DMA_24BIT, &lesc->sc_dmamap)) != 0) {
153 aprint_error(": DMA map create error %d\n", error);
154 goto bad_bsunmap;
155 }
156
157 /* Allocate DMA buffer */
158 if ((error = bus_dmamem_alloc(dmatag, MEMSIZE, PAGE_SIZE, 0,
159 &seg, 1, &rseg, BUS_DMA_NOWAIT | BUS_DMA_24BIT)) != 0) {
160 aprint_error(": DMA memory allocation error %d\n", error);
161 goto bad_destroy;
162 }
163 /* Map DMA buffer into kernel space */
164 if ((error = bus_dmamem_map(dmatag, &seg, rseg, MEMSIZE,
165 (void **)&sc->sc_mem, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) {
166 aprint_error(": DMA memory map error %d\n", error);
167 goto bad_free;
168 }
169 /* Load DMA buffer */
170 if ((error = bus_dmamap_load(dmatag, lesc->sc_dmamap,
171 sc->sc_mem, MEMSIZE, NULL, BUS_DMA_NOWAIT)) != 0) {
172 aprint_error(": DMA buffer map load error %d\n", error);
173 goto bad_unmap;
174 }
175
176 sc->sc_addr = lesc->sc_dmamap->dm_segs[0].ds_addr & 0xffffff;
177 sc->sc_memsize = MEMSIZE;
178 sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON;
179
180 sc->sc_supmedia = lemedia;
181 sc->sc_nsupmedia = NLEMEDIA;
182 sc->sc_defaultmedia = lemedia[0];
183
184 prom_getether(0, sc->sc_enaddr);
185
186 sc->sc_copytodesc = lance_copytobuf_contig;
187 sc->sc_copyfromdesc = lance_copyfrombuf_contig;
188 sc->sc_copytobuf = lance_copytobuf_contig;
189 sc->sc_copyfrombuf = lance_copyfrombuf_contig;
190 sc->sc_zerobuf = lance_zerobuf_contig;
191
192 sc->sc_rdcsr = lerdcsr;
193 sc->sc_wrcsr = lewrcsr;
194
195 am7990_config(&lesc->sc_am7990);
196
197 /* Install interrupt */
198 (void)bus_intr_establish(lesc->sc_bustag, oba->oba_pri, IPL_NET,
199 am7990_intr, sc);
200
201 return;
202
203 bad_unmap:
204 bus_dmamem_unmap(dmatag, (void *)sc->sc_mem, MEMSIZE);
205 bad_free:
206 bus_dmamem_free(lesc->sc_dmatag, &seg, rseg);
207 bad_destroy:
208 bus_dmamap_destroy(dmatag, lesc->sc_dmamap);
209 bad_bsunmap:
210 bus_space_unmap(oba->oba_bustag, lesc->sc_reg, 2 * sizeof(uint16_t));
211 }
212