tegra_mc.c revision 1.7.10.2 1 1.7.10.2 jdolecek /* $NetBSD: tegra_mc.c,v 1.7.10.2 2017/12/03 11:35:54 jdolecek Exp $ */
2 1.7.10.2 jdolecek
3 1.7.10.2 jdolecek /*-
4 1.7.10.2 jdolecek * Copyright (c) 2015 Jared D. McNeill <jmcneill (at) invisible.ca>
5 1.7.10.2 jdolecek * All rights reserved.
6 1.7.10.2 jdolecek *
7 1.7.10.2 jdolecek * Redistribution and use in source and binary forms, with or without
8 1.7.10.2 jdolecek * modification, are permitted provided that the following conditions
9 1.7.10.2 jdolecek * are met:
10 1.7.10.2 jdolecek * 1. Redistributions of source code must retain the above copyright
11 1.7.10.2 jdolecek * notice, this list of conditions and the following disclaimer.
12 1.7.10.2 jdolecek * 2. Redistributions in binary form must reproduce the above copyright
13 1.7.10.2 jdolecek * notice, this list of conditions and the following disclaimer in the
14 1.7.10.2 jdolecek * documentation and/or other materials provided with the distribution.
15 1.7.10.2 jdolecek *
16 1.7.10.2 jdolecek * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 1.7.10.2 jdolecek * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 1.7.10.2 jdolecek * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 1.7.10.2 jdolecek * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 1.7.10.2 jdolecek * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 1.7.10.2 jdolecek * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 1.7.10.2 jdolecek * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 1.7.10.2 jdolecek * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 1.7.10.2 jdolecek * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 1.7.10.2 jdolecek * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 1.7.10.2 jdolecek * SUCH DAMAGE.
27 1.7.10.2 jdolecek */
28 1.7.10.2 jdolecek
29 1.7.10.2 jdolecek #include "locators.h"
30 1.7.10.2 jdolecek
31 1.7.10.2 jdolecek #include <sys/cdefs.h>
32 1.7.10.2 jdolecek __KERNEL_RCSID(0, "$NetBSD: tegra_mc.c,v 1.7.10.2 2017/12/03 11:35:54 jdolecek Exp $");
33 1.7.10.2 jdolecek
34 1.7.10.2 jdolecek #include <sys/param.h>
35 1.7.10.2 jdolecek #include <sys/bus.h>
36 1.7.10.2 jdolecek #include <sys/device.h>
37 1.7.10.2 jdolecek #include <sys/intr.h>
38 1.7.10.2 jdolecek #include <sys/systm.h>
39 1.7.10.2 jdolecek #include <sys/kernel.h>
40 1.7.10.2 jdolecek
41 1.7.10.2 jdolecek #include <arm/nvidia/tegra_reg.h>
42 1.7.10.2 jdolecek #include <arm/nvidia/tegra_mcreg.h>
43 1.7.10.2 jdolecek #include <arm/nvidia/tegra_var.h>
44 1.7.10.2 jdolecek
45 1.7.10.2 jdolecek #include <dev/fdt/fdtvar.h>
46 1.7.10.2 jdolecek
47 1.7.10.2 jdolecek static int tegra_mc_match(device_t, cfdata_t, void *);
48 1.7.10.2 jdolecek static void tegra_mc_attach(device_t, device_t, void *);
49 1.7.10.2 jdolecek
50 1.7.10.2 jdolecek static int tegra_mc_intr(void *);
51 1.7.10.2 jdolecek
52 1.7.10.2 jdolecek struct tegra_mc_softc {
53 1.7.10.2 jdolecek device_t sc_dev;
54 1.7.10.2 jdolecek bus_space_tag_t sc_bst;
55 1.7.10.2 jdolecek bus_space_handle_t sc_bsh;
56 1.7.10.2 jdolecek void *sc_ih;
57 1.7.10.2 jdolecek };
58 1.7.10.2 jdolecek
59 1.7.10.2 jdolecek static struct tegra_mc_softc *mc_softc = NULL;
60 1.7.10.2 jdolecek
61 1.7.10.2 jdolecek CFATTACH_DECL_NEW(tegra_mc, sizeof(struct tegra_mc_softc),
62 1.7.10.2 jdolecek tegra_mc_match, tegra_mc_attach, NULL, NULL);
63 1.7.10.2 jdolecek
64 1.7.10.2 jdolecek #define MC_READ(sc, reg) \
65 1.7.10.2 jdolecek bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg))
66 1.7.10.2 jdolecek #define MC_WRITE(sc, reg, val) \
67 1.7.10.2 jdolecek bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val))
68 1.7.10.2 jdolecek #define MC_SET_CLEAR(sc, reg, set, clr) \
69 1.7.10.2 jdolecek tegra_reg_set_clear((sc)->sc_bst, (sc)->sc_bsh, (reg), (set), (clr))
70 1.7.10.2 jdolecek
71 1.7.10.2 jdolecek static int
72 1.7.10.2 jdolecek tegra_mc_match(device_t parent, cfdata_t cf, void *aux)
73 1.7.10.2 jdolecek {
74 1.7.10.2 jdolecek const char * const compatible[] = { "nvidia,tegra124-mc", NULL };
75 1.7.10.2 jdolecek struct fdt_attach_args * const faa = aux;
76 1.7.10.2 jdolecek
77 1.7.10.2 jdolecek return of_match_compatible(faa->faa_phandle, compatible);
78 1.7.10.2 jdolecek }
79 1.7.10.2 jdolecek
80 1.7.10.2 jdolecek static void
81 1.7.10.2 jdolecek tegra_mc_attach(device_t parent, device_t self, void *aux)
82 1.7.10.2 jdolecek {
83 1.7.10.2 jdolecek struct tegra_mc_softc * const sc = device_private(self);
84 1.7.10.2 jdolecek struct fdt_attach_args * const faa = aux;
85 1.7.10.2 jdolecek char intrstr[128];
86 1.7.10.2 jdolecek bus_addr_t addr;
87 1.7.10.2 jdolecek bus_size_t size;
88 1.7.10.2 jdolecek int error;
89 1.7.10.2 jdolecek
90 1.7.10.2 jdolecek if (fdtbus_get_reg(faa->faa_phandle, 0, &addr, &size) != 0) {
91 1.7.10.2 jdolecek aprint_error(": couldn't get registers\n");
92 1.7.10.2 jdolecek return;
93 1.7.10.2 jdolecek }
94 1.7.10.2 jdolecek
95 1.7.10.2 jdolecek sc->sc_dev = self;
96 1.7.10.2 jdolecek sc->sc_bst = faa->faa_bst;
97 1.7.10.2 jdolecek error = bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh);
98 1.7.10.2 jdolecek if (error) {
99 1.7.10.2 jdolecek aprint_error(": couldn't map %#llx: %d", (uint64_t)addr, error);
100 1.7.10.2 jdolecek return;
101 1.7.10.2 jdolecek }
102 1.7.10.2 jdolecek
103 1.7.10.2 jdolecek KASSERT(mc_softc == NULL);
104 1.7.10.2 jdolecek mc_softc = sc;
105 1.7.10.2 jdolecek
106 1.7.10.2 jdolecek aprint_naive("\n");
107 1.7.10.2 jdolecek aprint_normal(": MC\n");
108 1.7.10.2 jdolecek
109 1.7.10.2 jdolecek if (!fdtbus_intr_str(faa->faa_phandle, 0, intrstr, sizeof(intrstr))) {
110 1.7.10.2 jdolecek aprint_error_dev(self, "failed to decode interrupt\n");
111 1.7.10.2 jdolecek return;
112 1.7.10.2 jdolecek }
113 1.7.10.2 jdolecek
114 1.7.10.2 jdolecek sc->sc_ih = fdtbus_intr_establish(faa->faa_phandle, 0, IPL_VM,
115 1.7.10.2 jdolecek FDT_INTR_MPSAFE, tegra_mc_intr, sc);
116 1.7.10.2 jdolecek if (sc->sc_ih == NULL) {
117 1.7.10.2 jdolecek aprint_error_dev(self, "failed to establish interrupt on %s\n",
118 1.7.10.2 jdolecek intrstr);
119 1.7.10.2 jdolecek return;
120 1.7.10.2 jdolecek }
121 1.7.10.2 jdolecek aprint_normal_dev(self, "interrupting on %s\n", intrstr);
122 1.7.10.2 jdolecek
123 1.7.10.2 jdolecek MC_WRITE(sc, MC_INTSTATUS_REG, MC_INT__ALL);
124 1.7.10.2 jdolecek MC_WRITE(sc, MC_INTMASK_REG, MC_INT__ALL);
125 1.7.10.2 jdolecek }
126 1.7.10.2 jdolecek
127 1.7.10.2 jdolecek static int
128 1.7.10.2 jdolecek tegra_mc_intr(void *v)
129 1.7.10.2 jdolecek {
130 1.7.10.2 jdolecek struct tegra_mc_softc * const sc = v;
131 1.7.10.2 jdolecek
132 1.7.10.2 jdolecek const uint32_t status = MC_READ(sc, MC_INTSTATUS_REG);
133 1.7.10.2 jdolecek
134 1.7.10.2 jdolecek if (status == 0) {
135 1.7.10.2 jdolecek return 0;
136 1.7.10.2 jdolecek }
137 1.7.10.2 jdolecek
138 1.7.10.2 jdolecek const uint32_t err_status = MC_READ(sc, MC_ERR_STATUS_REG);
139 1.7.10.2 jdolecek const uint32_t err_adr = MC_READ(sc, MC_ERR_ADR_REG);
140 1.7.10.2 jdolecek
141 1.7.10.2 jdolecek device_printf(sc->sc_dev, "intrstatus %#x err %#x adr %#x\n",
142 1.7.10.2 jdolecek status, err_status, err_adr);
143 1.7.10.2 jdolecek
144 1.7.10.2 jdolecek MC_WRITE(sc, MC_INTSTATUS_REG, status);
145 1.7.10.2 jdolecek
146 1.7.10.2 jdolecek return status;
147 1.7.10.2 jdolecek }
148