1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2013 Bjoern A. Zeeb
5 * All rights reserved.
6 *
7 * This software was developed by SRI International and the University of
8 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-11-C-0249)
9 * ("MRC2"), as part of the DARPA MRC research programme.
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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <sys/param.h>
34 #include <sys/bus.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
37 #include <sys/rman.h>
38 #include <sys/socket.h>
39 #include <sys/systm.h>
40
41 #include <machine/bus.h>
42 #include <machine/resource.h>
43
44 #include <net/ethernet.h>
45 #include <net/if.h>
46 #include <net/if_media.h>
47 #include <net/if_var.h>
48
49 #include <dev/mii/mii.h>
50 #include <dev/mii/miivar.h>
51
52 #include <dev/fdt/fdt_common.h>
53 #include <dev/ofw/openfirm.h>
54 #include <dev/ofw/ofw_bus.h>
55 #include <dev/ofw/ofw_bus_subr.h>
56
57 #include <dev/altera/atse/if_atsereg.h>
58
59 /* "device miibus" required. See GENERIC if you get errors here. */
60 #include "miibus_if.h"
61
62 static int
atse_probe_fdt(device_t dev)63 atse_probe_fdt(device_t dev)
64 {
65
66 if (!ofw_bus_status_okay(dev))
67 return (ENXIO);
68
69 if (!ofw_bus_is_compatible(dev, "altera,atse")) {
70 return (ENXIO);
71 }
72
73 device_set_desc(dev, "Altera Triple-Speed Ethernet MegaCore");
74
75 return (BUS_PROBE_DEFAULT);
76 }
77
78 static int
atse_attach_fdt(device_t dev)79 atse_attach_fdt(device_t dev)
80 {
81 struct atse_softc *sc;
82 int error;
83
84 sc = device_get_softc(dev);
85 sc->atse_dev = dev;
86 sc->atse_unit = device_get_unit(dev);
87
88 /*
89 * FDT has the list of our resources. Given we are using multiple
90 * memory regions and possibly multiple interrupts, we need to attach
91 * them in the order specified in .dts:
92 * MAC, RX and RXC FIFO, TX and TXC FIFO; RX INTR, TX INTR.
93 */
94
95 /* MAC: Avalon-MM, atse management register region. */
96 sc->atse_mem_rid = 0;
97 sc->atse_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
98 &sc->atse_mem_rid, RF_ACTIVE);
99 if (sc->atse_mem_res == NULL) {
100 device_printf(dev, "failed to map memory for ctrl region\n");
101 /* Cleanup. */
102 atse_detach_resources(dev);
103
104 return (ENXIO);
105 }
106 if (bootverbose)
107 device_printf(sc->atse_dev, "MAC ctrl region at mem %p-%p\n",
108 (void *)rman_get_start(sc->atse_mem_res),
109 (void *)(rman_get_start(sc->atse_mem_res) +
110 rman_get_size(sc->atse_mem_res)));
111
112 error = atse_attach(dev);
113 if (error) {
114 /* Cleanup. */
115 atse_detach_resources(dev);
116
117 return (error);
118 }
119
120 return (0);
121 }
122
123 static device_method_t atse_methods_fdt[] = {
124 /* Device interface */
125 DEVMETHOD(device_probe, atse_probe_fdt),
126 DEVMETHOD(device_attach, atse_attach_fdt),
127 DEVMETHOD(device_detach, atse_detach_dev),
128
129 /* MII interface */
130 DEVMETHOD(miibus_readreg, atse_miibus_readreg),
131 DEVMETHOD(miibus_writereg, atse_miibus_writereg),
132 DEVMETHOD(miibus_statchg, atse_miibus_statchg),
133
134 DEVMETHOD_END
135 };
136
137 static driver_t atse_driver_fdt = {
138 "atse",
139 atse_methods_fdt,
140 sizeof(struct atse_softc)
141 };
142
143 DRIVER_MODULE(atse, simplebus, atse_driver_fdt, 0, 0);
144 DRIVER_MODULE(miibus, atse, miibus_driver, 0, 0);
145