/* $OpenBSD: wbsio.c,v 1.6 2010/07/18 12:44:55 kettenis Exp $ */ /* * Copyright (c) 2008 Mark Kettenis * * 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. */ /* * Winbond LPC Super I/O driver. */ #include #include #include #include #include #include #include /* ISA bus registers */ #define WBSIO_INDEX 0x00 /* Configuration Index Register */ #define WBSIO_DATA 0x01 /* Configuration Data Register */ #define WBSIO_IOSIZE 0x02 /* ISA I/O space size */ #define WBSIO_CONF_EN_MAGIC 0x87 /* enable configuration mode */ #define WBSIO_CONF_DS_MAGIC 0xaa /* disable configuration mode */ /* Configuration Space Registers */ #define WBSIO_LDN 0x07 /* Logical Device Number */ #define WBSIO_ID 0x20 /* Device ID */ #define WBSIO_REV 0x21 /* Device Revision */ #define WBSIO_ID_W83627HF 0x52 #define WBSIO_ID_W83627THF 0x82 #define WBSIO_ID_W83627EHF 0x88 #define WBSIO_ID_W83627DHG 0xa0 #define WBSIO_ID_W83627DHGP 0xb0 #define WBSIO_ID_W83627SF 0x59 #define WBSIO_ID_W83637HF 0x70 #define WBSIO_ID_W83697HF 0x60 /* Logical Device Number (LDN) Assignments */ #define WBSIO_LDN_HM 0x0b /* Hardware Monitor Control Registers (LDN B) */ #define WBSIO_HM_ADDR_MSB 0x60 /* Address [15:8] */ #define WBSIO_HM_ADDR_LSB 0x61 /* Address [7:0] */ #ifdef WBSIO_DEBUG #define DPRINTF(x) printf x #else #define DPRINTF(x) #endif struct wbsio_softc { struct device sc_dev; bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; }; int wbsio_probe(struct device *, void *, void *); void wbsio_attach(struct device *, struct device *, void *); int wbsio_print(void *, const char *); struct cfattach wbsio_ca = { sizeof(struct wbsio_softc), wbsio_probe, wbsio_attach }; struct cfdriver wbsio_cd = { NULL, "wbsio", DV_DULL }; static __inline void wbsio_conf_enable(bus_space_tag_t iot, bus_space_handle_t ioh) { bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_EN_MAGIC); bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_EN_MAGIC); } static __inline void wbsio_conf_disable(bus_space_tag_t iot, bus_space_handle_t ioh) { bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_DS_MAGIC); } static __inline u_int8_t wbsio_conf_read(bus_space_tag_t iot, bus_space_handle_t ioh, u_int8_t index) { bus_space_write_1(iot, ioh, WBSIO_INDEX, index); return (bus_space_read_1(iot, ioh, WBSIO_DATA)); } static __inline void wbsio_conf_write(bus_space_tag_t iot, bus_space_handle_t ioh, u_int8_t index, u_int8_t data) { bus_space_write_1(iot, ioh, WBSIO_INDEX, index); bus_space_write_1(iot, ioh, WBSIO_DATA, data); } int wbsio_probe(struct device *parent, void *match, void *aux) { struct isa_attach_args *ia = aux; bus_space_tag_t iot; bus_space_handle_t ioh; u_int8_t reg; /* Match by device ID */ iot = ia->ia_iot; if (bus_space_map(iot, ia->ipa_io[0].base, WBSIO_IOSIZE, 0, &ioh)) return (0); wbsio_conf_enable(iot, ioh); reg = wbsio_conf_read(iot, ioh, WBSIO_ID); DPRINTF(("wbsio_probe: id 0x%02x\n", reg)); wbsio_conf_disable(iot, ioh); bus_space_unmap(iot, ioh, WBSIO_IOSIZE); switch (reg) { case WBSIO_ID_W83627HF: case WBSIO_ID_W83627THF: case WBSIO_ID_W83627EHF: case WBSIO_ID_W83627DHG: case WBSIO_ID_W83627DHGP: case WBSIO_ID_W83637HF: case WBSIO_ID_W83697HF: ia->ipa_nio = 1; ia->ipa_io[0].length = WBSIO_IOSIZE; ia->ipa_nmem = 0; ia->ipa_nirq = 0; ia->ipa_ndrq = 0; return (1); } return (0); } void wbsio_attach(struct device *parent, struct device *self, void *aux) { struct wbsio_softc *sc = (void *)self; struct isa_attach_args *ia = aux; struct isa_attach_args nia; u_int8_t reg, reg0, reg1; u_int16_t iobase; /* Map ISA I/O space */ sc->sc_iot = ia->ia_iot; if (bus_space_map(sc->sc_iot, ia->ipa_io[0].base, WBSIO_IOSIZE, 0, &sc->sc_ioh)) { printf(": can't map i/o space\n"); return; } /* Enter configuration mode */ wbsio_conf_enable(sc->sc_iot, sc->sc_ioh); /* Read device ID */ reg = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_ID); switch (reg) { case WBSIO_ID_W83627HF: printf(": W83627HF"); break; case WBSIO_ID_W83627THF: printf(": W83627THF"); break; case WBSIO_ID_W83627EHF: printf(": W83627EHF"); break; case WBSIO_ID_W83627DHG: printf(": W83627DHG"); break; case WBSIO_ID_W83627DHGP: printf(": W83627DHG-P"); break; case WBSIO_ID_W83637HF: printf(": W83637HF"); break; case WBSIO_ID_W83697HF: printf(": W83697HF"); break; } /* Read device revision */ reg = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_REV); printf(" rev 0x%02x", reg); /* Select HM logical device */ wbsio_conf_write(sc->sc_iot, sc->sc_ioh, WBSIO_LDN, WBSIO_LDN_HM); /* * The address should be 8-byte aligned, but it seems some * BIOSes ignore this. They get away with it, because * Apparently the hardware simply ignores the lower three * bits. We do the same here. */ reg0 = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_HM_ADDR_LSB); reg1 = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_HM_ADDR_MSB); iobase = (reg1 << 8) | (reg0 & ~0x7); printf("\n"); /* Escape from configuration mode */ wbsio_conf_disable(sc->sc_iot, sc->sc_ioh); if (iobase == 0) return; nia = *ia; nia.ia_iobase = iobase; config_found(self, &nia, wbsio_print); } int wbsio_print(void *aux, const char *pnp) { struct isa_attach_args *ia = aux; if (pnp) printf("%s", pnp); if (ia->ia_iosize) printf(" port 0x%x", ia->ia_iobase); if (ia->ia_iosize > 1) printf("/%d", ia->ia_iosize); return (UNCONF); }