1 files changed, 76 insertions, 0 deletions
diff --git a/drm/nouveau/nvkm/subdev/fuse/nv50.c b/drm/nouveau/nvkm/subdev/fuse/nv50.c
new file mode 100644
index 000000000..0d2afc426
--- /dev/null
+++ b/drm/nouveau/nvkm/subdev/fuse/nv50.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2014 Martin Peres
+ *
+ * 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
+ */
+#include "priv.h"
+
+struct nv50_fuse_priv {
+	struct nvkm_fuse base;
+
+	spinlock_t fuse_enable_lock;
+};
+
+static u32
+nv50_fuse_rd32(struct nvkm_object *object, u64 addr)
+{
+	struct nv50_fuse_priv *priv = (void *)object;
+	unsigned long flags;
+	u32 fuse_enable, val;
+
+	/* racy if another part of nvkm start writing to this reg */
+	spin_lock_irqsave(&priv->fuse_enable_lock, flags);
+	fuse_enable = nv_mask(priv, 0x1084, 0x800, 0x800);
+	val = nv_rd32(priv, 0x21000 + addr);
+	nv_wr32(priv, 0x1084, fuse_enable);
+	spin_unlock_irqrestore(&priv->fuse_enable_lock, flags);
+	return val;
+}
+
+
+static int
+nv50_fuse_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
+	       struct nvkm_oclass *oclass, void *data, u32 size,
+	       struct nvkm_object **pobject)
+{
+	struct nv50_fuse_priv *priv;
+	int ret;
+
+	ret = nvkm_fuse_create(parent, engine, oclass, &priv);
+	*pobject = nv_object(priv);
+	if (ret)
+		return ret;
+
+	spin_lock_init(&priv->fuse_enable_lock);
+	return 0;
+}
+
+struct nvkm_oclass
+nv50_fuse_oclass = {
+	.handle = NV_SUBDEV(FUSE, 0x50),
+	.ofuncs = &(struct nvkm_ofuncs) {
+		.ctor = nv50_fuse_ctor,
+		.dtor = _nvkm_fuse_dtor,
+		.init = _nvkm_fuse_init,
+		.fini = _nvkm_fuse_fini,
+		.rd32 = nv50_fuse_rd32,
+	},
+};