2 * Copyright 2014 Martin Peres
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
22 * Authors: Martin Peres
26 struct gf100_fuse_priv {
27 struct nvkm_fuse base;
29 spinlock_t fuse_enable_lock;
33 gf100_fuse_rd32(struct nvkm_object *object, u64 addr)
35 struct gf100_fuse_priv *priv = (void *)object;
37 u32 fuse_enable, unk, val;
39 /* racy if another part of nvkm start writing to these regs */
40 spin_lock_irqsave(&priv->fuse_enable_lock, flags);
41 fuse_enable = nv_mask(priv, 0x22400, 0x800, 0x800);
42 unk = nv_mask(priv, 0x21000, 0x1, 0x1);
43 val = nv_rd32(priv, 0x21100 + addr);
44 nv_wr32(priv, 0x21000, unk);
45 nv_wr32(priv, 0x22400, fuse_enable);
46 spin_unlock_irqrestore(&priv->fuse_enable_lock, flags);
52 gf100_fuse_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
53 struct nvkm_oclass *oclass, void *data, u32 size,
54 struct nvkm_object **pobject)
56 struct gf100_fuse_priv *priv;
59 ret = nvkm_fuse_create(parent, engine, oclass, &priv);
60 *pobject = nv_object(priv);
64 spin_lock_init(&priv->fuse_enable_lock);
70 .handle = NV_SUBDEV(FUSE, 0xC0),
71 .ofuncs = &(struct nvkm_ofuncs) {
72 .ctor = gf100_fuse_ctor,
73 .dtor = _nvkm_fuse_dtor,
74 .init = _nvkm_fuse_init,
75 .fini = _nvkm_fuse_fini,
76 .rd32 = gf100_fuse_rd32,