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path: root/drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv04.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv04.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/bus/nv04.c75
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);
+}