genet_acpi.c revision 1.4 
1/* $NetBSD: genet_acpi.c,v 1.4 2021/01/29 15:49:55 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_acpi.c,v 1.4 2021/01/29 15:49:55 thorpej Exp $");
33
34#include <sys/param.h>
35#include <sys/bus.h>
36#include <sys/cpu.h>
37#include <sys/device.h>
38
39#include <net/if.h>
40#include <net/if_dl.h>
41#include <net/if_ether.h>
42#include <net/if_media.h>
43
44#include <dev/mii/miivar.h>
45
46#include <dev/ic/bcmgenetvar.h>
47
48#include <dev/acpi/acpireg.h>
49#include <dev/acpi/acpivar.h>
50#include <dev/acpi/acpi_intr.h>
51
52#ifdef NET_MPSAFE
53#define	GENET_INTR_MPSAFE	true
54#else
55#define	GENET_INTR_MPSAFE	false
56#endif
57
58static const struct device_compatible_entry compat_data[] = {
59	{ .compat = "BCM6E4E" },	/* Broadcom GENET v5 */
60	DEVICE_COMPAT_EOL
61};
62
63static int	genet_acpi_match(device_t, cfdata_t, void *);
64static void	genet_acpi_attach(device_t, device_t, void *);
65
66CFATTACH_DECL_NEW(genet_acpi, sizeof(struct genet_softc),
67    genet_acpi_match, genet_acpi_attach, NULL, NULL);
68
69static int
70genet_acpi_match(device_t parent, cfdata_t cf, void *aux)
71{
72	struct acpi_attach_args *aa = aux;
73
74	return acpi_compatible_match(aa, compat_data);
75}
76
77static void
78genet_acpi_attach(device_t parent, device_t self, void *aux)
79{
80	struct genet_softc * const sc = device_private(self);
81	struct acpi_attach_args *aa = aux;
82	ACPI_HANDLE handle = aa->aa_node->ad_handle;
83	struct acpi_resources res;
84	struct acpi_mem *mem;
85	struct acpi_irq *irq;
86	char *phy_mode;
87	ACPI_STATUS rv;
88	int error;
89	void *ih;
90
91	sc->sc_dev = self;
92
93	rv = acpi_resource_parse(sc->sc_dev, handle, "_CRS",
94	    &res, &acpi_resource_parse_ops_default);
95	if (ACPI_FAILURE(rv))
96		return;
97
98	mem = acpi_res_mem(&res, 0);
99	if (mem == NULL) {
100		aprint_error_dev(self, "couldn't find mem resource\n");
101		goto done;
102	}
103
104	irq = acpi_res_irq(&res, 0);
105	if (irq == NULL) {
106		aprint_error_dev(self, "couldn't find irq resource\n");
107		goto done;
108	}
109
110	sc->sc_bst = aa->aa_memt;
111	error = bus_space_map(sc->sc_bst, mem->ar_base, mem->ar_length,
112	    0, &sc->sc_bsh);
113	if (error != 0) {
114		aprint_error_dev(self, "couldn't map registers\n");
115		goto done;
116	}
117	sc->sc_dmat = BUS_DMA_TAG_VALID(aa->aa_dmat64) ?
118	    aa->aa_dmat64 : aa->aa_dmat;
119	sc->sc_phy_id = MII_PHY_ANY;
120
121	rv = acpi_dsd_string(handle, "phy-mode", &phy_mode);
122	if (ACPI_FAILURE(rv)) {
123		aprint_error_dev(self, "missing 'phy-mode' property\n");
124		goto done;
125	}
126
127	if (strcmp(phy_mode, "rgmii-rxid") == 0)
128		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_RXID;
129	else if (strcmp(phy_mode, "rgmii-txid") == 0)
130		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_TXID;
131	else if (strcmp(phy_mode, "rgmii-id") == 0)
132		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_ID;
133	else if (strcmp(phy_mode, "rgmii") == 0)
134		sc->sc_phy_mode = GENET_PHY_MODE_RGMII;
135	else {
136		aprint_error(": unsupported phy-mode '%s'\n", phy_mode);
137		goto done;
138	}
139
140	aprint_normal("%s", device_xname(self));
141	if (genet_attach(sc) != 0)
142		goto done;
143
144        ih = acpi_intr_establish(self, (uint64_t)(uintptr_t)handle, IPL_NET,
145	    GENET_INTR_MPSAFE, genet_intr, sc, device_xname(self));
146	if (ih == NULL) {
147		aprint_error_dev(self, "couldn't establish interrupt\n");
148		goto done;
149	}
150
151done:
152	acpi_resource_cleanup(&res);
153}
154