Allow pluart(4) to attach to acpi(4).

ok mlarkin@, patrick@

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;
+}