1 /* $OpenBSD: mvodog.c,v 1.1 2023/03/02 09:56:52 jmatthew Exp $ */ 2 /* 3 * Copyright (c) 2022 Jonathan Matthew <jmatthew@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <sys/param.h> 19 #include <sys/systm.h> 20 #include <sys/device.h> 21 #include <machine/bus.h> 22 #include <machine/fdt.h> 23 24 #include <dev/ofw/openfirm.h> 25 #include <dev/ofw/ofw_misc.h> 26 #include <dev/ofw/fdt.h> 27 28 #define WDT_ENABLE (1 << 8) 29 30 #define RSTOUT_ENABLE (1 << 8) 31 #define RSTOUT_MASK (1 << 10) 32 33 #define HREAD4(sc, ioh, reg) \ 34 (bus_space_read_4((sc)->sc_iot, (ioh), (reg))) 35 #define HWRITE4(sc, ioh, reg, val) \ 36 bus_space_write_4((sc)->sc_iot, (ioh), (reg), (val)) 37 #define HSET4(sc, ioh, reg, bits) \ 38 HWRITE4((sc), (ioh), (reg), HREAD4((sc), (ioh), (reg)) | (bits)) 39 #define HCLR4(sc, ioh, reg, bits) \ 40 HWRITE4((sc), (ioh), (reg), HREAD4((sc), (ioh), (reg)) & ~(bits)) 41 42 struct mvodog_softc { 43 struct device sc_dev; 44 bus_space_tag_t sc_iot; 45 bus_space_handle_t sc_reg_ioh; 46 bus_space_handle_t sc_rstout_ioh; 47 bus_space_handle_t sc_rstout_mask_ioh; 48 }; 49 50 int mvodog_match(struct device *, void *, void *); 51 void mvodog_attach(struct device *, struct device *, void *); 52 53 const struct cfattach mvodog_ca = { 54 sizeof (struct mvodog_softc), mvodog_match, mvodog_attach 55 }; 56 57 struct cfdriver mvodog_cd = { 58 NULL, "mvodog", DV_DULL 59 }; 60 61 int 62 mvodog_match(struct device *parent, void *cfdata, void *aux) 63 { 64 struct fdt_attach_args *faa = aux; 65 66 return OF_is_compatible(faa->fa_node, "marvell,armada-380-wdt"); 67 } 68 69 void 70 mvodog_attach(struct device *parent, struct device *self, void *aux) 71 { 72 struct mvodog_softc *sc = (struct mvodog_softc *)self; 73 struct fdt_attach_args *faa = aux; 74 75 if (faa->fa_nreg < 1) { 76 printf(": no registers\n"); 77 return; 78 } 79 80 sc->sc_iot = faa->fa_iot; 81 if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, 82 faa->fa_reg[0].size, 0, &sc->sc_reg_ioh)) { 83 printf(": can't map registers\n"); 84 return; 85 } 86 87 if (bus_space_map(sc->sc_iot, faa->fa_reg[1].addr, 88 faa->fa_reg[1].size, 0, &sc->sc_rstout_ioh)) { 89 printf(": can't map rstout\n"); 90 return; 91 } 92 93 if (bus_space_map(sc->sc_iot, faa->fa_reg[2].addr, 94 faa->fa_reg[2].size, 0, &sc->sc_rstout_mask_ioh)) { 95 printf(": can't map rstout mask\n"); 96 return; 97 } 98 99 printf("\n"); 100 101 /* Disable watchdog timer. */ 102 HSET4(sc, sc->sc_rstout_mask_ioh, 0, RSTOUT_MASK); 103 HCLR4(sc, sc->sc_rstout_ioh, 0, RSTOUT_ENABLE); 104 HCLR4(sc, sc->sc_reg_ioh, 0, WDT_ENABLE); 105 } 106