1 /* $NetBSD: eqos_acpi.c,v 1.2 2023/12/24 16:12:54 skrll Exp $ */
2
3 /*-
4 * Copyright (c) 2022 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 <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: eqos_acpi.c,v 1.2 2023/12/24 16:12:54 skrll Exp $");
31
32 #include <sys/param.h>
33 #include <sys/bus.h>
34 #include <sys/cpu.h>
35 #include <sys/device.h>
36 #include <sys/kmem.h>
37
38 #include <sys/rndsource.h>
39
40 #include <net/if.h>
41 #include <net/if_dl.h>
42 #include <net/if_ether.h>
43 #include <net/if_media.h>
44
45 #include <dev/mii/miivar.h>
46
47 #include <dev/ic/dwc_eqos_var.h>
48
49 #include <dev/acpi/acpireg.h>
50 #include <dev/acpi/acpivar.h>
51 #include <dev/acpi/acpi_intr.h>
52
53 #define CSR_RATE_RGMII 125000000
54
55 static const struct device_compatible_entry compat_data[] = {
56 { .compat = "snps,dwmac-4.20a" }, /* DT link */
57 DEVICE_COMPAT_EOL
58 };
59
60 static int eqos_acpi_match(device_t, cfdata_t, void *);
61 static void eqos_acpi_attach(device_t, device_t, void *);
62
63 static void eqos_acpi_init_props(struct eqos_softc *, ACPI_HANDLE);
64
65 CFATTACH_DECL_NEW(eqos_acpi, sizeof(struct eqos_softc),
66 eqos_acpi_match, eqos_acpi_attach, NULL, NULL);
67
68 static int
eqos_acpi_match(device_t parent,cfdata_t cf,void * aux)69 eqos_acpi_match(device_t parent, cfdata_t cf, void *aux)
70 {
71 struct acpi_attach_args *aa = aux;
72
73 return acpi_compatible_match(aa, compat_data);
74 }
75
76 static void
eqos_acpi_attach(device_t parent,device_t self,void * aux)77 eqos_acpi_attach(device_t parent, device_t self, void *aux)
78 {
79 struct eqos_softc * const sc = device_private(self);
80 struct acpi_attach_args *aa = aux;
81 ACPI_HANDLE handle = aa->aa_node->ad_handle;
82 struct acpi_resources res;
83 struct acpi_mem *mem;
84 struct acpi_irq *irq;
85 ACPI_STATUS rv;
86 int error;
87 void *ih;
88
89 sc->sc_dev = self;
90
91 rv = acpi_resource_parse(sc->sc_dev, handle, "_CRS",
92 &res, &acpi_resource_parse_ops_default);
93 if (ACPI_FAILURE(rv))
94 return;
95
96 mem = acpi_res_mem(&res, 0);
97 if (mem == NULL) {
98 aprint_error_dev(self, "couldn't find mem resource\n");
99 goto done;
100 }
101
102 irq = acpi_res_irq(&res, 0);
103 if (irq == NULL) {
104 aprint_error_dev(self, "couldn't find irq resource\n");
105 goto done;
106 }
107
108 sc->sc_bst = aa->aa_memt;
109 error = bus_space_map(sc->sc_bst, mem->ar_base, mem->ar_length,
110 0, &sc->sc_bsh);
111 if (error != 0) {
112 aprint_error_dev(self, "couldn't map registers\n");
113 goto done;
114 }
115 sc->sc_dmat = BUS_DMA_TAG_VALID(aa->aa_dmat64) ?
116 aa->aa_dmat64 : aa->aa_dmat;
117 sc->sc_phy_id = MII_PHY_ANY;
118 sc->sc_csr_clock = CSR_RATE_RGMII;
119
120 eqos_acpi_init_props(sc, handle);
121
122 aprint_normal("%s", device_xname(self));
123 if (eqos_attach(sc) != 0)
124 goto done;
125
126 ih = acpi_intr_establish(self, (uint64_t)(uintptr_t)handle, IPL_NET,
127 true, eqos_intr, sc, device_xname(self));
128 if (ih == NULL) {
129 aprint_error_dev(self, "couldn't establish interrupt\n");
130 goto done;
131 }
132
133 done:
134 acpi_resource_cleanup(&res);
135 }
136
137 static void
eqos_acpi_init_props(struct eqos_softc * sc,ACPI_HANDLE handle)138 eqos_acpi_init_props(struct eqos_softc *sc, ACPI_HANDLE handle)
139 {
140 prop_dictionary_t prop = device_properties(sc->sc_dev);
141 ACPI_STATUS rv;
142 ACPI_INTEGER ival;
143 #if notyet
144 ACPI_HANDLE axi;
145 char *sval;
146 #endif
147
148 /* Defaults */
149 prop_dictionary_set_uint(prop, "snps,wr_osr_lmt", 4);
150 prop_dictionary_set_uint(prop, "snps,rd_osr_lmt", 8);
151
152 /* Get settings from DSD properties */
153 rv = acpi_dsd_integer(handle, "snps,mixed-burst", &ival);
154 if (ACPI_SUCCESS(rv) && ival) {
155 prop_dictionary_set_bool(prop, "snps,mixed-burst", true);
156 }
157 rv = acpi_dsd_integer(handle, "snps,tso", &ival);
158 if (ACPI_SUCCESS(rv) && ival) {
159 prop_dictionary_set_bool(prop, "snps,tso", true);
160 }
161
162 #if notyet
163 rv = acpi_dsd_string(handle, "snps,axi-config", &sval);
164 if (ACPI_SUCCESS(rv)) {
165 rv = AcpiGetHandle(handle, sval, &axi);
166 if (ACPI_SUCCESS(rv)) {
167 rv = acpi_dsd_integer(axi, "snps,wr_osr_lmt", &ival);
168 if (ACPI_SUCCESS(rv) && ival > 0) {
169 prop_dictionary_set_uint(prop,
170 "snps,wr_osr_lmt", ival);
171 }
172 rv = acpi_dsd_integer(axi, "snps,rd_osr_lmt", &ival);
173 if (ACPI_SUCCESS(rv) && ival > 0) {
174 prop_dictionary_set_uint(prop,
175 "snps,rd_osr_lmt", ival);
176 }
177 }
178 kmem_strfree(sval);
179 }
180 #endif
181 }
182