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
Indexes created Mon Oct 20 11:09:49 GMT 2025