1 files changed, 75 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv04.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv04.c
new file mode 100644
index 000000000..cfed17c06
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv04.c
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2012 Nouveau Community
+ *
+ * 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: Martin Peres <martin.peres@labri.fr>
+ *          Ben Skeggs
+ */
+#include "priv.h"
+
+#include <subdev/gpio.h>
+
+static void
+nv04_bus_intr(struct nvkm_bus *bus)
+{
+	struct nvkm_subdev *subdev = &bus->subdev;
+	struct nvkm_device *device = subdev->device;
+	u32 stat = nvkm_rd32(device, 0x001100) & nvkm_rd32(device, 0x001140);
+
+	if (stat & 0x00000001) {
+		nvkm_error(subdev, "BUS ERROR\n");
+		stat &= ~0x00000001;
+		nvkm_wr32(device, 0x001100, 0x00000001);
+	}
+
+	if (stat & 0x00000110) {
+		struct nvkm_gpio *gpio = device->gpio;
+		if (gpio)
+			nvkm_subdev_intr(&gpio->subdev);
+		stat &= ~0x00000110;
+		nvkm_wr32(device, 0x001100, 0x00000110);
+	}
+
+	if (stat) {
+		nvkm_error(subdev, "intr %08x\n", stat);
+		nvkm_mask(device, 0x001140, stat, 0x00000000);
+	}
+}
+
+static void
+nv04_bus_init(struct nvkm_bus *bus)
+{
+	struct nvkm_device *device = bus->subdev.device;
+	nvkm_wr32(device, 0x001100, 0xffffffff);
+	nvkm_wr32(device, 0x001140, 0x00000111);
+}
+
+static const struct nvkm_bus_func
+nv04_bus = {
+	.init = nv04_bus_init,
+	.intr = nv04_bus_intr,
+};
+
+int
+nv04_bus_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
+	     struct nvkm_bus **pbus)
+{
+	return nvkm_bus_new_(&nv04_bus, device, type, inst, pbus);
+}