1 /* $NetBSD: ahcisata_fdt.c,v 1.3 2021/01/27 03:10:21 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2018 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30
31 __KERNEL_RCSID(0, "$NetBSD: ahcisata_fdt.c,v 1.3 2021/01/27 03:10:21 thorpej Exp $");
32
33 #include <sys/param.h>
34 #include <sys/bus.h>
35 #include <sys/device.h>
36 #include <sys/intr.h>
37 #include <sys/systm.h>
38
39 #include <dev/ata/atavar.h>
40 #include <dev/ic/ahcisatavar.h>
41
42 #include <dev/fdt/fdtvar.h>
43
44 static const struct device_compatible_entry compat_data[] = {
45 { .compat = "snps,dwc-ahci" },
46 { .compat = "generic-ahci" },
47 DEVICE_COMPAT_EOL
48 };
49
50 static int
ahcisata_fdt_match(device_t parent,cfdata_t cf,void * aux)51 ahcisata_fdt_match(device_t parent, cfdata_t cf, void *aux)
52 {
53 struct fdt_attach_args * const faa = aux;
54
55 return of_compatible_match(faa->faa_phandle, compat_data);
56 }
57
58 static void
ahcisata_fdt_attach(device_t parent,device_t self,void * aux)59 ahcisata_fdt_attach(device_t parent, device_t self, void *aux)
60 {
61 struct ahci_softc * const sc = device_private(self);
62 struct fdt_attach_args * const faa = aux;
63 const int phandle = faa->faa_phandle;
64 struct fdtbus_reset *rst;
65 struct clk *clk;
66 char intrstr[128];
67 bus_addr_t addr;
68 bus_size_t size;
69 int i;
70
71 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
72 aprint_error(": couldn't get registers\n");
73 return;
74 }
75
76 sc->sc_atac.atac_dev = self;
77 sc->sc_dmat = faa->faa_dmat;
78 sc->sc_ahcit = faa->faa_bst;
79 sc->sc_ahcis = size;
80 if (bus_space_map(sc->sc_ahcit, addr, size, 0, &sc->sc_ahcih) != 0) {
81 aprint_error(": couldn't map registers\n");
82 return;
83 }
84 if (of_getprop_uint32(phandle, "ports-implemented", &sc->sc_ahci_ports) != 0)
85 sc->sc_save_init_data = true;
86
87 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
88 aprint_error(": failed to decode interrupt\n");
89 return;
90 }
91
92 for (i = 0; (clk = fdtbus_clock_get_index(phandle, i)) != NULL; i++)
93 if (clk_enable(clk) != 0) {
94 aprint_error(": couldn't enable clock #%d\n", i);
95 return;
96 }
97 for (i = 0; (rst = fdtbus_reset_get_index(phandle, i)) != NULL; i++)
98 if (fdtbus_reset_deassert(rst) != 0) {
99 aprint_error(": couldn't de-assert reset #%d\n", i);
100 return;
101 }
102
103 aprint_naive("\n");
104 aprint_normal(": AHCI SATA controller\n");
105
106 if (fdtbus_intr_establish_xname(phandle, 0, IPL_BIO, 0,
107 ahci_intr, sc, device_xname(self)) == NULL) {
108 aprint_error_dev(self,
109 "failed to establish interrupt on %s\n", intrstr);
110 return;
111 }
112 aprint_normal_dev(self, "interrupting on %s\n", intrstr);
113
114 ahci_attach(sc);
115 }
116
117 CFATTACH_DECL_NEW(ahcisata_fdt, sizeof(struct ahci_softc),
118 ahcisata_fdt_match, ahcisata_fdt_attach, NULL, NULL);
119