diff options
Diffstat (limited to 'sys/arch/i386/pci/gscpm.c')
| -rw-r--r-- | sys/arch/i386/pci/gscpm.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/sys/arch/i386/pci/gscpm.c b/sys/arch/i386/pci/gscpm.c new file mode 100644 index 00000000000..4156dbfbc95 --- /dev/null +++ b/sys/arch/i386/pci/gscpm.c @@ -0,0 +1,179 @@ +/* $OpenBSD: gscpm.c,v 1.1 2004/09/15 20:28:53 grange Exp $ */ +/* + * Copyright (c) 2004 Alexander Yurchenko <grange@openbsd.org> + * + * 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. + */ + +/* + * National Semiconductor Geode SC1100 SMI/ACPI module. + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/device.h> +#include <sys/kernel.h> +#include <sys/sysctl.h> +#ifdef __HAVE_TIMECOUNTER +#include <sys/timetc.h> +#endif + +#include <machine/bus.h> + +#include <dev/pci/pcidevs.h> +#include <dev/pci/pcireg.h> +#include <dev/pci/pcivar.h> + +#include <i386/pci/gscpmreg.h> + +struct gscpm_softc { + struct device sc_dev; + + pci_chipset_tag_t sc_pc; + pcitag_t sc_tag; + bus_space_tag_t sc_iot; + bus_space_handle_t sc_acpi_ioh; +}; + +int gscpm_match(struct device *, void *, void *); +void gscpm_attach(struct device *, struct device *, void *); + +int gscpm_setperf(int); + +#ifdef __HAVE_TIMECOUNTER +u_int gscpm_get_timecount(struct timecounter *tc); + +struct timecounter gscpm_timecounter = { + gscpm_get_timecount, /* get_timecount */ + 0, /* no poll_pps */ + 0xffffff, /* counter_mask */ + 14318180 / 4, /* frequency */ + "Geode SC1100", /* name */ + 1000 /* quality */ +}; +#endif /* __HAVE_TIMECOUNTER */ + +struct cfattach gscpm_ca = { + sizeof (struct gscpm_softc), + gscpm_match, + gscpm_attach +}; + +struct cfdriver gscpm_cd = { + NULL, "gscpm", DV_DULL +}; + +#if 0 +static void *gscpm_cookie; /* XXX */ +#endif + +int +gscpm_match(struct device *parent, void *match, void *aux) +{ + struct pci_attach_args *pa = aux; + + if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_NS && + PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_NS_SC1100_SMI) + return (1); + + return (0); +} + +void +gscpm_attach(struct device *parent, struct device *self, void *aux) +{ + struct gscpm_softc *sc = (struct gscpm_softc *)self; + struct pci_attach_args *pa = aux; + pcireg_t csr, acpibase; + + sc->sc_pc = pa->pa_pc; + sc->sc_tag = pa->pa_tag; + sc->sc_iot = pa->pa_iot; + + /* Enable I/O space */ + csr = pci_conf_read(sc->sc_pc, sc->sc_tag, PCI_COMMAND_STATUS_REG); + pci_conf_write(sc->sc_pc, sc->sc_tag, PCI_COMMAND_STATUS_REG, + csr | PCI_COMMAND_IO_ENABLE); + + /* Map ACPI registers */ + acpibase = pci_conf_read(sc->sc_pc, sc->sc_tag, GSCPM_ACPIBASE); + if (bus_space_map(sc->sc_iot, PCI_MAPREG_IO_ADDR(acpibase), + GSCPM_ACPISIZE, 0, &sc->sc_acpi_ioh)) { + printf(": failed to map ACPI registers\n"); + return; + } + + printf("\n"); + +#ifdef __HAVE_TIMECOUNTER + /* Hook into the kern_tc */ + gscpm_timecounter.tc_priv = sc; + tc_init(&gscpm_timecounter); +#endif /* __HAVE_TIMECOUNTER */ + +/* XXX: disabled due to unresolved yet hardware errata */ +#if 0 + /* Hook into the hw.setperf sysctl */ + gscpm_cookie = sc; + cpu_setperf = gscpm_setperf; +#endif + +} + +#ifdef __HAVE_TIMECOUNTER +u_int +gscpm_get_timecount(struct timecounter *tc) +{ + struct gscpm_softc *sc = tc->tc_priv; + u_int u1, u2, u3; + + u2 = bus_space_read_4(sc->sc_iot, sc->sc_acpi_ioh, GSCPM_PM_TMR); + u3 = bus_space_read_4(sc->sc_iot, sc->sc_acpi_ioh, GSCPM_PM_TMR); + do { + u1 = u2; + u2 = u3; + u3 = bus_space_read_4(sc->sc_iot, sc->sc_acpi_ioh, + GSCPM_PM_TMR); + } while (u1 > u2 || u2 > u3); + + return (u2); +} +#endif /* __HAVE_TIMECOUNTER */ + +#if 0 +int +gscpm_setperf(int level) +{ + struct gscpm_softc *sc = gscpm_cookie; + int i; + u_int32_t pctl; + + pctl = bus_space_read_4(sc->sc_iot, sc->sc_acpi_ioh, GSCPM_P_CNT); + + if (level == 100) { + /* 100 is a maximum perfomance, disable throttling */ + pctl &= ~GSCPM_P_CNT_THTEN; + } else { + for (i = 0; i < GSCPM_THT_LEVELS; i++) + if (level >= gscpm_tht[i].level) + break; + pctl = (0xf0 | GSCPM_P_CNT_THTEN | + GSCPM_P_CNT_CLK(gscpm_tht[i].value)); + } + + /* Update processor control register */ + bus_space_write_4(sc->sc_iot, sc->sc_acpi_ioh, GSCPM_P_CNT, pctl); + + return (0); +} +#endif |