1 /* $OpenBSD: hireset.c,v 1.1 2018/08/27 14:12:59 kettenis Exp $ */ 2 /* 3 * Copyright (c) 2018 Mark Kettenis <kettenis@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 22 #include <machine/intr.h> 23 #include <machine/bus.h> 24 #include <machine/fdt.h> 25 26 #include <dev/ofw/openfirm.h> 27 #include <dev/ofw/ofw_clock.h> 28 #include <dev/ofw/ofw_misc.h> 29 #include <dev/ofw/fdt.h> 30 31 struct hireset_softc { 32 struct device sc_dev; 33 uint32_t sc_rst_syscon; 34 35 struct reset_device sc_rd; 36 }; 37 38 int hireset_match(struct device *, void *, void *); 39 void hireset_attach(struct device *, struct device *, void *); 40 41 struct cfattach hireset_ca = { 42 sizeof (struct hireset_softc), hireset_match, hireset_attach 43 }; 44 45 struct cfdriver hireset_cd = { 46 NULL, "hireset", DV_DULL 47 }; 48 49 void hireset_reset(void *, uint32_t *, int); 50 51 int 52 hireset_match(struct device *parent, void *match, void *aux) 53 { 54 struct fdt_attach_args *faa = aux; 55 56 return OF_is_compatible(faa->fa_node, "hisilicon,hi3660-reset"); 57 } 58 59 void 60 hireset_attach(struct device *parent, struct device *self, void *aux) 61 { 62 struct hireset_softc *sc = (struct hireset_softc *)self; 63 struct fdt_attach_args *faa = aux; 64 65 sc->sc_rst_syscon = OF_getpropint(faa->fa_node, "hisi,rst-syscon", 0); 66 67 printf("\n"); 68 69 sc->sc_rd.rd_node = faa->fa_node; 70 sc->sc_rd.rd_cookie = sc; 71 sc->sc_rd.rd_reset = hireset_reset; 72 reset_register(&sc->sc_rd); 73 } 74 75 void 76 hireset_reset(void *cookie, uint32_t *cells, int on) 77 { 78 struct hireset_softc *sc = cookie; 79 struct regmap *rm; 80 uint32_t offset = cells[0]; 81 uint32_t bit = cells[1]; 82 83 rm = regmap_byphandle(sc->sc_rst_syscon); 84 if (rm == NULL) { 85 printf("%s: can't find regmap\n", sc->sc_dev.dv_xname); 86 return; 87 } 88 89 if (on) 90 regmap_write_4(rm, offset + 0, (1 << bit)); 91 else 92 regmap_write_4(rm, offset + 4, (1 << bit)); 93 } 94