1/* $NetBSD: genet_acpi.c,v 1.5 2021/05/03 10:28:26 rin 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 1.5 2021/05/03 10:28:26 rin 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 <sys/rndsource.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/acpi/acpireg.h>
51#include <dev/acpi/acpivar.h>
52#include <dev/acpi/acpi_intr.h>
53
54#ifdef NET_MPSAFE
55#define	GENET_INTR_MPSAFE	true
56#else
57#define	GENET_INTR_MPSAFE	false
58#endif
59
60static const struct device_compatible_entry compat_data[] = {
61	{ .compat = "BCM6E4E" },	/* Broadcom GENET v5 */
62	DEVICE_COMPAT_EOL
63};
64
65static int	genet_acpi_match(device_t, cfdata_t, void *);
66static void	genet_acpi_attach(device_t, device_t, void *);
67
68CFATTACH_DECL_NEW(genet_acpi, sizeof(struct genet_softc),
69    genet_acpi_match, genet_acpi_attach, NULL, NULL);
70
71static int
72genet_acpi_match(device_t parent, cfdata_t cf, void *aux)
73{
74	struct acpi_attach_args *aa = aux;
75
76	return acpi_compatible_match(aa, compat_data);
77}
78
79static void
80genet_acpi_attach(device_t parent, device_t self, void *aux)
81{
82	struct genet_softc * const sc = device_private(self);
83	struct acpi_attach_args *aa = aux;
84	ACPI_HANDLE handle = aa->aa_node->ad_handle;
85	struct acpi_resources res;
86	struct acpi_mem *mem;
87	struct acpi_irq *irq;
88	char *phy_mode;
89	ACPI_STATUS rv;
90	int error;
91	void *ih;
92
93	sc->sc_dev = self;
94
95	rv = acpi_resource_parse(sc->sc_dev, handle, "_CRS",
96	    &res, &acpi_resource_parse_ops_default);
97	if (ACPI_FAILURE(rv))
98		return;
99
100	mem = acpi_res_mem(&res, 0);
101	if (mem == NULL) {
102		aprint_error_dev(self, "couldn't find mem resource\n");
103		goto done;
104	}
105
106	irq = acpi_res_irq(&res, 0);
107	if (irq == NULL) {
108		aprint_error_dev(self, "couldn't find irq resource\n");
109		goto done;
110	}
111
112	sc->sc_bst = aa->aa_memt;
113	error = bus_space_map(sc->sc_bst, mem->ar_base, mem->ar_length,
114	    0, &sc->sc_bsh);
115	if (error != 0) {
116		aprint_error_dev(self, "couldn't map registers\n");
117		goto done;
118	}
119	sc->sc_dmat = BUS_DMA_TAG_VALID(aa->aa_dmat64) ?
120	    aa->aa_dmat64 : aa->aa_dmat;
121	sc->sc_phy_id = MII_PHY_ANY;
122
123	rv = acpi_dsd_string(handle, "phy-mode", &phy_mode);
124	if (ACPI_FAILURE(rv)) {
125		aprint_error_dev(self, "missing 'phy-mode' property\n");
126		goto done;
127	}
128
129	if (strcmp(phy_mode, "rgmii-rxid") == 0)
130		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_RXID;
131	else if (strcmp(phy_mode, "rgmii-txid") == 0)
132		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_TXID;
133	else if (strcmp(phy_mode, "rgmii-id") == 0)
134		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_ID;
135	else if (strcmp(phy_mode, "rgmii") == 0)
136		sc->sc_phy_mode = GENET_PHY_MODE_RGMII;
137	else {
138		aprint_error(": unsupported phy-mode '%s'\n", phy_mode);
139		goto done;
140	}
141
142	aprint_normal("%s", device_xname(self));
143	if (genet_attach(sc) != 0)
144		goto done;
145
146        ih = acpi_intr_establish(self, (uint64_t)(uintptr_t)handle, IPL_NET,
147	    GENET_INTR_MPSAFE, genet_intr, sc, device_xname(self));
148	if (ih == NULL) {
149		aprint_error_dev(self, "couldn't establish interrupt\n");
150		goto done;
151	}
152
153done:
154	acpi_resource_cleanup(&res);
155}
156