genet_fdt.c revision 1.4 
1/* $NetBSD: genet_fdt.c,v 1.4 2021/01/27 03:10:21 thorpej Exp $ */
2
3/*-
4 * Copyright (c) 2020 Jared McNeill <jmcneill@invisible.ca>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include "opt_net_mpsafe.h"
30
31#include <sys/cdefs.h>
32__KERNEL_RCSID(0, "$NetBSD: genet_fdt.c,v 1.4 2021/01/27 03:10:21 thorpej Exp $");
33
34#include <sys/param.h>
35#include <sys/bus.h>
36#include <sys/device.h>
37#include <sys/intr.h>
38#include <sys/systm.h>
39#include <sys/kernel.h>
40
41#include <net/if.h>
42#include <net/if_dl.h>
43#include <net/if_ether.h>
44#include <net/if_media.h>
45
46#include <dev/mii/miivar.h>
47
48#include <dev/ic/bcmgenetvar.h>
49
50#include <dev/fdt/fdtvar.h>
51
52#ifdef NET_MPSAFE
53#define	FDT_INTR_FLAGS	FDT_INTR_MPSAFE
54#else
55#define	FDT_INTR_FLAGS	0
56#endif
57
58static int	genet_fdt_match(device_t, cfdata_t, void *);
59static void	genet_fdt_attach(device_t, device_t, void *);
60
61CFATTACH_DECL_NEW(genet_fdt, sizeof(struct genet_softc),
62	genet_fdt_match, genet_fdt_attach, NULL, NULL);
63
64static const struct device_compatible_entry compat_data[] = {
65	{ .compat = "brcm,bcm2711-genet-v5" },
66	DEVICE_COMPAT_EOL
67};
68
69static int
70genet_fdt_match(device_t parent, cfdata_t cf, void *aux)
71{
72	struct fdt_attach_args * const faa = aux;
73
74	return of_compatible_match(faa->faa_phandle, compat_data);
75}
76
77static void
78genet_fdt_attach(device_t parent, device_t self, void *aux)
79{
80	struct genet_softc * const sc = device_private(self);
81	struct fdt_attach_args * const faa = aux;
82	const int phandle = faa->faa_phandle;
83	char intrstr[128];
84	bus_addr_t addr;
85	bus_size_t size;
86	void *ih;
87
88	if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
89		aprint_error(": couldn't get registers\n");
90		return;
91	}
92
93	sc->sc_dev = self;
94	sc->sc_bst = faa->faa_bst;
95	if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
96		aprint_error(": couldn't map registers\n");
97		return;
98	}
99	sc->sc_dmat = faa->faa_dmat;
100	sc->sc_phy_id = MII_PHY_ANY;
101
102	const char *phy_mode = fdtbus_get_string(phandle, "phy-mode");
103	if (phy_mode == NULL) {
104		aprint_error(": missing 'phy-mode' property\n");
105		return;
106	}
107
108	if (strcmp(phy_mode, "rgmii-rxid") == 0)
109		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_RXID;
110	else if (strcmp(phy_mode, "rgmii-txid") == 0)
111		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_TXID;
112	else if (strcmp(phy_mode, "rgmii-id") == 0)
113		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_ID;
114	else if (strcmp(phy_mode, "rgmii") == 0)
115		sc->sc_phy_mode = GENET_PHY_MODE_RGMII;
116	else {
117		aprint_error(": unsupported phy-mode '%s'\n", phy_mode);
118		return;
119	}
120
121	if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
122		aprint_error(": failed to decode interrupt\n");
123		return;
124	}
125
126	if (genet_attach(sc) != 0)
127		return;
128
129	ih = fdtbus_intr_establish_xname(phandle, 0, IPL_NET, FDT_INTR_FLAGS,
130	    genet_intr, sc, device_xname(self));
131	if (ih == NULL) {
132		aprint_error_dev(self, "couldn't establish interrupt on %s\n",
133		    intrstr);
134		return;
135	}
136	aprint_normal_dev(self, "interrupting on %s\n", intrstr);
137}
138