/* $OpenBSD: sysreg.c,v 1.6 2021/10/24 17:52:28 mpi Exp $ */ /* * Copyright (c) 2015 Jonathan Gray * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include #define SYS_ID 0x00 #define SYS_PROCID0 0x84 #define SYS_PROCID1 0x88 #define SYS_CFGDATA 0xa0 #define SYS_CFGCTRL 0xa4 #define SYS_CFGSTAT 0xa8 #define SYS_CFG_WRITE (1 << 30) #define SYS_CFG_START (1U << 31) #define SYS_CFG_RESET 5 #define SYS_CFG_SHUTDOWN 8 #define SYS_CFG_REBOOT 9 #define SYS_CFGSTAT_COMPLETE (1 << 0) #define SYS_CFGSTAT_ERROR (1 << 1) struct sysreg_softc { struct device sc_dev; bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; }; struct sysreg_softc *sysreg_sc; int sysreg_match(struct device *, void *, void *); void sysreg_attach(struct device *, struct device *, void *); void sysconf_function(struct sysreg_softc *, int); void sysconf_reboot(void); void sysconf_shutdown(void); const struct cfattach sysreg_ca = { sizeof (struct sysreg_softc), sysreg_match, sysreg_attach }; struct cfdriver sysreg_cd = { NULL, "sysreg", DV_DULL }; int sysreg_match(struct device *parent, void *match, void *aux) { struct fdt_attach_args *faa = aux; return OF_is_compatible(faa->fa_node, "arm,vexpress-sysreg"); } void sysreg_attach(struct device *parent, struct device *self, void *aux) { struct fdt_attach_args *faa = aux; struct sysreg_softc *sc = (struct sysreg_softc *)self; uint32_t id; sc->sc_iot = faa->fa_iot; if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, faa->fa_reg[0].size, 0, &sc->sc_ioh)) panic(": bus_space_map failed!"); sysreg_sc = sc; id = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SYS_ID); printf(": ID 0x%x", id); id = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SYS_PROCID0); printf(" PROCID0 0x%x\n", id); cpuresetfn = sysconf_reboot; powerdownfn = sysconf_shutdown; } void sysconf_function(struct sysreg_softc *sc, int function) { int dcc, site, position, device; dcc = 0; site = 0; position = 0; device = 0; bus_space_write_4(sc->sc_iot, sc->sc_ioh, SYS_CFGSTAT, 0); bus_space_write_4(sc->sc_iot, sc->sc_ioh, SYS_CFGCTRL, SYS_CFG_START | SYS_CFG_WRITE | (dcc << 26) | (function << 20) | (site << 16) | (position << 12) | device); while ((bus_space_read_4(sc->sc_iot, sc->sc_ioh, SYS_CFGSTAT) & SYS_CFGSTAT_COMPLETE) == 0); if (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SYS_CFGSTAT) & SYS_CFGSTAT_ERROR) printf("SYS_CFGSTAT error\n"); } void sysconf_reboot(void) { struct sysreg_softc *sc = sysreg_sc; if (sc == NULL) return; sysconf_function(sc, SYS_CFG_REBOOT); } void sysconf_shutdown(void) { struct sysreg_softc *sc = sysreg_sc; if (sc == NULL) return; sysconf_function(sc, SYS_CFG_SHUTDOWN); }