diff options
Diffstat (limited to 'sys/dev/acpi/pluart_acpi.c')
| -rw-r--r-- | sys/dev/acpi/pluart_acpi.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/sys/dev/acpi/pluart_acpi.c b/sys/dev/acpi/pluart_acpi.c new file mode 100644 index 00000000000..79b853ae33f --- /dev/null +++ b/sys/dev/acpi/pluart_acpi.c @@ -0,0 +1,153 @@ +/* $OpenBSD: pluart_acpi.c,v 1.1 2018/07/02 12:46:20 kettenis Exp $ */ +/* + * Copyright (c) 2018 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. + */ + +#include <sys/param.h> +#include <sys/malloc.h> +#include <sys/systm.h> +#include <sys/tty.h> + +#include <dev/acpi/acpireg.h> +#include <dev/acpi/acpivar.h> +#include <dev/acpi/acpidev.h> +#include <dev/acpi/amltypes.h> +#include <dev/acpi/dsdt.h> + +#undef DEVNAME +#include <dev/ic/pluartvar.h> +#include <dev/cons.h> + +struct pluart_acpi_softc { + struct pluart_softc sc; + struct acpi_softc *sc_acpi; + struct aml_node *sc_node; + + bus_addr_t sc_addr; + bus_size_t sc_size; + + int sc_irq; + int sc_irq_flags; + void *sc_ih; +}; + +int pluart_acpi_match(struct device *, void *, void *); +void pluart_acpi_attach(struct device *, struct device *, void *); + +struct cfattach pluart_acpi_ca = { + sizeof(struct pluart_acpi_softc), pluart_acpi_match, pluart_acpi_attach +}; + +const char *pluart_hids[] = { + "AMDI0511", + NULL +}; + +int pluart_acpi_parse_resources(int, union acpi_resource *, void *); +int pluart_acpi_is_console(struct pluart_acpi_softc *); + +int +pluart_acpi_match(struct device *parent, void *match, void *aux) +{ + struct acpi_attach_args *aaa = aux; + struct cfdata *cf = match; + + return acpi_matchhids(aaa, pluart_hids, cf->cf_driver->cd_name); +} + +void +pluart_acpi_attach(struct device *parent, struct device *self, void *aux) +{ + struct acpi_attach_args *aaa = aux; + struct pluart_acpi_softc *sc = (struct pluart_acpi_softc *)self; + struct aml_value res; + + sc->sc_acpi = (struct acpi_softc *)parent; + sc->sc_node = aaa->aaa_node; + printf(" %s", sc->sc_node->name); + + if (aml_evalname(sc->sc_acpi, sc->sc_node, "_CRS", 0, NULL, &res)) { + printf(": can't find registers\n"); + return; + } + + aml_parse_resource(&res, pluart_acpi_parse_resources, sc); + printf(" addr 0x%lx/0x%lx", sc->sc_addr, sc->sc_size); + if (sc->sc_addr == 0 || sc->sc_size == 0) { + printf("\n"); + return; + } + + printf(" irq %d", sc->sc_irq); + + sc->sc.sc_iot = aaa->aaa_memt; + if (bus_space_map(sc->sc.sc_iot, sc->sc_addr, sc->sc_size, 0, + &sc->sc.sc_ioh)) { + printf(": can't map registers\n"); + return; + } + + sc->sc_ih = acpi_intr_establish(sc->sc_irq, sc->sc_irq_flags, IPL_TTY, + pluart_intr, sc, sc->sc.sc_dev.dv_xname); + if (sc->sc_ih == NULL) { + printf(": can't establish interrupt\n"); + return; + } + + pluart_attach_common(&sc->sc, pluart_acpi_is_console(sc)); +} + +int +pluart_acpi_parse_resources(int crsidx, union acpi_resource *crs, void *arg) +{ + struct pluart_acpi_softc *sc = arg; + int type = AML_CRSTYPE(crs); + + switch (type) { + case LR_MEM32FIXED: + sc->sc_addr = crs->lr_m32fixed._bas; + sc->sc_size = crs->lr_m32fixed._len; + break; + case LR_EXTIRQ: + sc->sc_irq = crs->lr_extirq.irq[0]; + sc->sc_irq_flags = crs->lr_extirq.flags; + break; + } + + return 0; +} + +int +pluart_acpi_is_console(struct pluart_acpi_softc *sc) +{ + struct acpi_table_header *hdr; + struct acpi_spcr *spcr; + struct acpi_gas *base; + struct acpi_q *entry; + + SIMPLEQ_FOREACH(entry, &sc->sc_acpi->sc_tables, q_next) { + hdr = entry->q_table; + if (strncmp(hdr->signature, SPCR_SIG, + sizeof(hdr->signature)) == 0) { + spcr = entry->q_table; + base = &spcr->base_address; + if (base->address_space_id == GAS_SYSTEM_MEMORY && + base->address == sc->sc_addr) + return 1; + } + } + + return 0; +} |