genet_fdt.c revision 1.1 
1/* $NetBSD: genet_fdt.c,v 1.1 2020/02/22 00:28:35 jmcneill 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 1.1 2020/02/22 00:28:35 jmcneill 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 int
65genet_fdt_match(device_t parent, cfdata_t cf, void *aux)
66{
67	const char * const compatible[] = {
68		"brcm,bcm2711-genet-v5",
69		NULL
70	};
71	struct fdt_attach_args * const faa = aux;
72
73	return of_match_compatible(faa->faa_phandle, compatible);
74}
75
76static void
77genet_fdt_attach(device_t parent, device_t self, void *aux)
78{
79	struct genet_softc * const sc = device_private(self);
80	struct fdt_attach_args * const faa = aux;
81	const int phandle = faa->faa_phandle;
82	char intrstr[128];
83	bus_addr_t addr;
84	bus_size_t size;
85	void *ih;
86
87	if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
88		aprint_error(": couldn't get registers\n");
89		return;
90	}
91
92	sc->sc_dev = self;
93	sc->sc_bst = faa->faa_bst;
94	if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
95		aprint_error(": couldn't map registers\n");
96		return;
97	}
98	sc->sc_dmat = faa->faa_dmat;
99	sc->sc_phy_id = MII_PHY_ANY;
100
101	const char *phy_mode = fdtbus_get_string(phandle, "phy-mode");
102	if (phy_mode == NULL) {
103		aprint_error(": missing 'phy-mode' property\n");
104		return;
105	}
106
107	if (strcmp(phy_mode, "rgmii-rxid") == 0)
108		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_RXID;
109	else if (strcmp(phy_mode, "rgmii-txid") == 0)
110		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_TXID;
111	else if (strcmp(phy_mode, "rgmii") == 0)
112		sc->sc_phy_mode = GENET_PHY_MODE_RGMII;
113	else {
114		aprint_error(": unsupported phy-mode '%s'\n", phy_mode);
115		return;
116	}
117
118	if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
119		aprint_error(": failed to decode interrupt\n");
120		return;
121	}
122
123	if (genet_attach(sc) != 0)
124		return;
125
126	ih = fdtbus_intr_establish(phandle, 0, IPL_NET, FDT_INTR_FLAGS,
127	    genet_intr, sc);
128	if (ih == NULL) {
129		aprint_error_dev(self, "couldn't establish interrupt on %s\n",
130		    intrstr);
131		return;
132	}
133	aprint_normal_dev(self, "interrupting on %s\n", intrstr);
134}
135