Add bytgpio(4) a driver for the gpio controllers found on Intel's Bay Trail

SoC.

2 files changed, 248 insertions, 1 deletions

diff --git a/sys/dev/acpi/bytgpio.c b/sys/dev/acpi/bytgpio.c
new file mode 100644
index 00000000000..46978d31609
--- /dev/null
+++ b/sys/dev/acpi/bytgpio.c
@@ -0,0 +1,242 @@
+/*	$OpenBSD: bytgpio.c,v 1.1 2016/03/28 17:29:11 kettenis Exp $	*/
+/*
+ * Copyright (c) 2016 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 <dev/acpi/acpireg.h>
+#include <dev/acpi/acpivar.h>
+#include <dev/acpi/acpidev.h>
+#include <dev/acpi/amltypes.h>
+#include <dev/acpi/dsdt.h>
+
+#define BYTGPIO_PAD_VAL		0x00000001
+
+struct bytgpio_softc {
+	struct device sc_dev;
+	struct acpi_softc *sc_acpi;
+	struct aml_node *sc_node;
+
+	bus_space_tag_t sc_memt;
+	bus_space_handle_t sc_memh;
+	bus_addr_t sc_addr;
+	bus_size_t sc_size;
+
+	int sc_irq;
+	int sc_irq_flags;
+	void *sc_ih;
+
+	const int *sc_pins;
+	int sc_npins;
+
+	struct acpi_gpio sc_gpio;
+};
+
+int	bytgpio_match(struct device *, void *, void *);
+void	bytgpio_attach(struct device *, struct device *, void *);
+
+struct cfattach bytgpio_ca = {
+	sizeof(struct bytgpio_softc), bytgpio_match, bytgpio_attach
+};
+
+struct cfdriver bytgpio_cd = {
+	NULL, "bytgpio", DV_DULL
+};
+
+const char *bytgpio_hids[] = {
+	"INT33FC",
+	0
+};
+
+/*
+ * The pads for the pins are randomly ordered.
+ */
+
+const int byt_score_pins[] = {
+	85, 89, 93, 96, 99, 102, 98, 101, 34, 37, 36, 38, 39, 35, 40,
+	84, 62, 61, 64, 59, 54, 56, 60, 55, 63, 57, 51, 50, 53, 47,
+	52, 49, 48, 43, 46, 41, 45, 42, 58, 44, 95, 105, 70, 68, 67,
+	66, 69, 71, 65, 72, 86, 90, 88, 92, 103, 77, 79, 83, 78, 81,
+	80, 82, 13, 12, 15, 14, 17, 18, 19, 16, 2, 1, 0, 4, 6, 7, 9,
+	8, 33, 32, 31, 30, 29, 27, 25, 28, 26, 23, 21, 20, 24, 22, 5,
+	3, 10, 11, 106, 87, 91, 104, 97, 100
+};
+
+const int byt_ncore_pins[] = {
+	19, 18, 17, 20, 21, 22, 24, 25, 23, 16, 14, 15, 12, 26, 27,
+	1, 4, 8, 11, 0, 3, 6, 10, 13, 2, 5, 9, 7
+};
+
+const int byt_sus_pins[] = {
+        29, 33, 30, 31, 32, 34, 36, 35, 38, 37, 18, 7, 11, 20, 17, 1,
+	8, 10, 19, 12, 0, 2, 23, 39, 28, 27, 22, 21, 24, 25, 26, 51,
+	56, 54, 49, 55, 48, 57, 50, 58, 52, 53, 59, 40
+};
+
+int	bytgpio_parse_resources(union acpi_resource *, void *);
+int	bytgpio_read_pin(void *, int);
+int	bytgpio_intr(void *);
+
+int
+bytgpio_match(struct device *parent, void *match, void *aux)
+{
+	struct acpi_attach_args *aaa = aux;
+	struct cfdata *cf = match;
+	int64_t sta;
+
+	if (!acpi_matchhids(aaa, bytgpio_hids, cf->cf_driver->cd_name))
+		return 0;
+
+	if (aml_evalinteger((struct acpi_softc *)parent, aaa->aaa_node,
+	    "_STA", 0, NULL, &sta))
+		sta = STA_PRESENT | STA_ENABLED | STA_DEV_OK | 0x1000;
+
+	if ((sta & STA_PRESENT) == 0)
+		return 0;
+
+	return 1;
+}
+
+void
+bytgpio_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct acpi_attach_args *aaa = aux;
+	struct bytgpio_softc *sc = (struct bytgpio_softc *)self;
+	struct aml_value res;
+	int64_t uid;
+
+	sc->sc_acpi = (struct acpi_softc *)parent;
+	sc->sc_node = aaa->aaa_node;
+	printf(": %s", sc->sc_node->name);
+
+	if (aml_evalinteger(sc->sc_acpi, sc->sc_node, "_UID", 0, NULL, &uid)) {
+		printf(", can't find uid\n");
+		return;
+	}
+
+	printf(" uid %lld", uid);
+
+	switch (uid) {
+	case 1:
+		sc->sc_pins = byt_score_pins;
+		sc->sc_npins = nitems(byt_score_pins);
+		break;
+	case 2:
+		sc->sc_pins = byt_ncore_pins;
+		sc->sc_npins = nitems(byt_ncore_pins);
+		break;
+	case 3:
+		sc->sc_pins = byt_sus_pins;
+		sc->sc_npins = nitems(byt_sus_pins);
+		break;
+	default:
+		return;
+	}
+
+	if (aml_evalname(sc->sc_acpi, sc->sc_node, "_CRS", 0, NULL, &res)) {
+		printf(", can't find registers\n");
+		return;
+	}
+
+	aml_parse_resource(&res, bytgpio_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_memt = aaa->aaa_memt;
+	if (bus_space_map(sc->sc_memt, sc->sc_addr, sc->sc_size, 0,
+	    &sc->sc_memh)) {
+		printf(", can't map registers\n");
+		return;
+	}
+
+#if 0
+	sc->sc_ih = acpi_intr_establish(sc->sc_irq, sc->sc_irq_flags, IPL_BIO,
+	    bytgpio_intr, sc, sc->sc_dev.dv_xname);
+	if (sc->sc_ih == NULL) {
+		printf(", can't establish interrupt\n");
+		return;
+	}
+#endif
+
+	sc->sc_gpio.cookie = sc;
+	sc->sc_gpio.read_pin = bytgpio_read_pin;
+	sc->sc_node->gpio = &sc->sc_gpio;
+
+	printf(", %d pins\n", sc->sc_npins);
+}
+
+int
+bytgpio_parse_resources(union acpi_resource *crs, void *arg)
+{
+	struct bytgpio_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;
+	default:
+		printf(" type 0x%x\n", type);
+		break;
+	}
+
+	return 0;
+}
+
+int
+bytgpio_read_pin(void *cookie, int pin)
+{
+	struct bytgpio_softc *sc = cookie;
+	uint32_t reg;
+
+	reg = bus_space_read_4(sc->sc_memt, sc->sc_memh, sc->sc_pins[pin] * 16 + 8);
+	return (reg & BYTGPIO_PAD_VAL);
+}
+
+#if 0
+
+int
+bytgpio_intr(void *arg)
+{
+	struct bytgpio_softc *sc = arg;
+	uint32_t reg;
+	int pin;
+
+	for (pin = 0; pin < sc->sc_npins; pin++) {
+		if (pin % 32 == 0)
+			reg = bus_space_read_4(sc->sc_memt, sc->sc_memh, 0x800 + (pin / 8));
+		if (reg & (1 << (pin % 32))) {
+			
+		}
+	}
+
+	printf("%s\n", __func__);
+	return 1;
+}
+
+#endif
diff --git a/sys/dev/acpi/files.acpi b/sys/dev/acpi/files.acpi
index 4cad71a0730..846d7c797aa 100644
--- a/sys/dev/acpi/files.acpi
+++ b/sys/dev/acpi/files.acpi
@@ -1,4 +1,4 @@
-#	$OpenBSD: files.acpi,v 1.30 2016/01/12 01:11:15 jcs Exp $
+#	$OpenBSD: files.acpi,v 1.31 2016/03/28 17:29:11 kettenis Exp $
 #
 # Config file and device description for machine-independent ACPI code.
 # Included by ports that need it.
@@ -112,6 +112,11 @@ device	aibs
 attach	aibs at acpi
 file	dev/acpi/atk0110.c		aibs
 
+# Intel Bay Trail GPIO
+device	bytgpio
+attach	bytgpio at acpi
+file	dev/acpi/bytgpio.c		bytgpio
+
 # SD Host Controller
 attach	sdhc at acpi with sdhc_acpi
 file	dev/acpi/sdhc_acpi.c		sdhc_acpi