1 files changed, 251 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gpio/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/gpio/base.c
new file mode 100644
index 000000000000..dea58161ba46
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gpio/base.c
@@ -0,0 +1,251 @@
+/*
+ * Copyright 2011 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs
+ */
+#include "priv.h"
+
+#include <core/device.h>
+#include <core/notify.h>
+
+static int
+nvkm_gpio_drive(struct nvkm_gpio *gpio, int idx, int line, int dir, int out)
+{
+	const struct nvkm_gpio_impl *impl = (void *)nv_object(gpio)->oclass;
+	return impl->drive ? impl->drive(gpio, line, dir, out) : -ENODEV;
+}
+
+static int
+nvkm_gpio_sense(struct nvkm_gpio *gpio, int idx, int line)
+{
+	const struct nvkm_gpio_impl *impl = (void *)nv_object(gpio)->oclass;
+	return impl->sense ? impl->sense(gpio, line) : -ENODEV;
+}
+
+static int
+nvkm_gpio_find(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line,
+	       struct dcb_gpio_func *func)
+{
+	struct nvkm_bios *bios = nvkm_bios(gpio);
+	u8  ver, len;
+	u16 data;
+
+	if (line == 0xff && tag == 0xff)
+		return -EINVAL;
+
+	data = dcb_gpio_match(bios, idx, tag, line, &ver, &len, func);
+	if (data)
+		return 0;
+
+	/* Apple iMac G4 NV18 */
+	if (nv_device_match(nv_object(gpio), 0x0189, 0x10de, 0x0010)) {
+		if (tag == DCB_GPIO_TVDAC0) {
+			*func = (struct dcb_gpio_func) {
+				.func = DCB_GPIO_TVDAC0,
+				.line = 4,
+				.log[0] = 0,
+				.log[1] = 1,
+			};
+			return 0;
+		}
+	}
+
+	return -ENOENT;
+}
+
+static int
+nvkm_gpio_set(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line, int state)
+{
+	struct dcb_gpio_func func;
+	int ret;
+
+	ret = nvkm_gpio_find(gpio, idx, tag, line, &func);
+	if (ret == 0) {
+		int dir = !!(func.log[state] & 0x02);
+		int out = !!(func.log[state] & 0x01);
+		ret = nvkm_gpio_drive(gpio, idx, func.line, dir, out);
+	}
+
+	return ret;
+}
+
+static int
+nvkm_gpio_get(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line)
+{
+	struct dcb_gpio_func func;
+	int ret;
+
+	ret = nvkm_gpio_find(gpio, idx, tag, line, &func);
+	if (ret == 0) {
+		ret = nvkm_gpio_sense(gpio, idx, func.line);
+		if (ret >= 0)
+			ret = (ret == (func.log[1] & 1));
+	}
+
+	return ret;
+}
+
+static void
+nvkm_gpio_intr_fini(struct nvkm_event *event, int type, int index)
+{
+	struct nvkm_gpio *gpio = container_of(event, typeof(*gpio), event);
+	const struct nvkm_gpio_impl *impl = (void *)nv_object(gpio)->oclass;
+	impl->intr_mask(gpio, type, 1 << index, 0);
+}
+
+static void
+nvkm_gpio_intr_init(struct nvkm_event *event, int type, int index)
+{
+	struct nvkm_gpio *gpio = container_of(event, typeof(*gpio), event);
+	const struct nvkm_gpio_impl *impl = (void *)nv_object(gpio)->oclass;
+	impl->intr_mask(gpio, type, 1 << index, 1 << index);
+}
+
+static int
+nvkm_gpio_intr_ctor(struct nvkm_object *object, void *data, u32 size,
+		    struct nvkm_notify *notify)
+{
+	struct nvkm_gpio_ntfy_req *req = data;
+	if (!WARN_ON(size != sizeof(*req))) {
+		notify->size  = sizeof(struct nvkm_gpio_ntfy_rep);
+		notify->types = req->mask;
+		notify->index = req->line;
+		return 0;
+	}
+	return -EINVAL;
+}
+
+static void
+nvkm_gpio_intr(struct nvkm_subdev *subdev)
+{
+	struct nvkm_gpio *gpio = nvkm_gpio(subdev);
+	const struct nvkm_gpio_impl *impl = (void *)nv_object(gpio)->oclass;
+	u32 hi, lo, i;
+
+	impl->intr_stat(gpio, &hi, &lo);
+
+	for (i = 0; (hi | lo) && i < impl->lines; i++) {
+		struct nvkm_gpio_ntfy_rep rep = {
+			.mask = (NVKM_GPIO_HI * !!(hi & (1 << i))) |
+				(NVKM_GPIO_LO * !!(lo & (1 << i))),
+		};
+		nvkm_event_send(&gpio->event, rep.mask, i, &rep, sizeof(rep));
+	}
+}
+
+static const struct nvkm_event_func
+nvkm_gpio_intr_func = {
+	.ctor = nvkm_gpio_intr_ctor,
+	.init = nvkm_gpio_intr_init,
+	.fini = nvkm_gpio_intr_fini,
+};
+
+int
+_nvkm_gpio_fini(struct nvkm_object *object, bool suspend)
+{
+	const struct nvkm_gpio_impl *impl = (void *)object->oclass;
+	struct nvkm_gpio *gpio = nvkm_gpio(object);
+	u32 mask = (1 << impl->lines) - 1;
+
+	impl->intr_mask(gpio, NVKM_GPIO_TOGGLED, mask, 0);
+	impl->intr_stat(gpio, &mask, &mask);
+
+	return nvkm_subdev_fini(&gpio->base, suspend);
+}
+
+static struct dmi_system_id gpio_reset_ids[] = {
+	{
+		.ident = "Apple Macbook 10,1",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro10,1"),
+		}
+	},
+	{ }
+};
+
+int
+_nvkm_gpio_init(struct nvkm_object *object)
+{
+	struct nvkm_gpio *gpio = nvkm_gpio(object);
+	int ret;
+
+	ret = nvkm_subdev_init(&gpio->base);
+	if (ret)
+		return ret;
+
+	if (gpio->reset && dmi_check_system(gpio_reset_ids))
+		gpio->reset(gpio, DCB_GPIO_UNUSED);
+
+	return ret;
+}
+
+void
+_nvkm_gpio_dtor(struct nvkm_object *object)
+{
+	struct nvkm_gpio *gpio = (void *)object;
+	nvkm_event_fini(&gpio->event);
+	nvkm_subdev_destroy(&gpio->base);
+}
+
+int
+nvkm_gpio_create_(struct nvkm_object *parent, struct nvkm_object *engine,
+		  struct nvkm_oclass *oclass, int length, void **pobject)
+{
+	const struct nvkm_gpio_impl *impl = (void *)oclass;
+	struct nvkm_gpio *gpio;
+	int ret;
+
+	ret = nvkm_subdev_create_(parent, engine, oclass, 0, "GPIO",
+				  "gpio", length, pobject);
+	gpio = *pobject;
+	if (ret)
+		return ret;
+
+	gpio->find = nvkm_gpio_find;
+	gpio->set  = nvkm_gpio_set;
+	gpio->get  = nvkm_gpio_get;
+	gpio->reset = impl->reset;
+
+	ret = nvkm_event_init(&nvkm_gpio_intr_func, 2, impl->lines,
+			      &gpio->event);
+	if (ret)
+		return ret;
+
+	nv_subdev(gpio)->intr = nvkm_gpio_intr;
+	return 0;
+}
+
+int
+_nvkm_gpio_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
+		struct nvkm_oclass *oclass, void *data, u32 size,
+		struct nvkm_object **pobject)
+{
+	struct nvkm_gpio *gpio;
+	int ret;
+
+	ret = nvkm_gpio_create(parent, engine, oclass, &gpio);
+	*pobject = nv_object(gpio);
+	if (ret)
+		return ret;
+
+	return 0;
+}