1 /*
2 * Copyright 2014 Martin Peres
3 *
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:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
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.
21 *
22 * Authors: Martin Peres
23 */
24 #include "priv.h"
25
26 struct nv50_fuse_priv {
27 struct nvkm_fuse base;
28
29 spinlock_t fuse_enable_lock;
30 };
31
32 static u32
nv50_fuse_rd32(struct nvkm_object * object,u64 addr)33 nv50_fuse_rd32(struct nvkm_object *object, u64 addr)
34 {
35 struct nv50_fuse_priv *priv = (void *)object;
36 unsigned long flags;
37 u32 fuse_enable, val;
38
39 /* racy if another part of nvkm start writing to this reg */
40 spin_lock_irqsave(&priv->fuse_enable_lock, flags);
41 fuse_enable = nv_mask(priv, 0x1084, 0x800, 0x800);
42 val = nv_rd32(priv, 0x21000 + addr);
43 nv_wr32(priv, 0x1084, fuse_enable);
44 spin_unlock_irqrestore(&priv->fuse_enable_lock, flags);
45 return val;
46 }
47
48
49 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)50 nv50_fuse_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
51 struct nvkm_oclass *oclass, void *data, u32 size,
52 struct nvkm_object **pobject)
53 {
54 struct nv50_fuse_priv *priv;
55 int ret;
56
57 ret = nvkm_fuse_create(parent, engine, oclass, &priv);
58 *pobject = nv_object(priv);
59 if (ret)
60 return ret;
61
62 spin_lock_init(&priv->fuse_enable_lock);
63 return 0;
64 }
65
66 struct nvkm_oclass
67 nv50_fuse_oclass = {
68 .handle = NV_SUBDEV(FUSE, 0x50),
69 .ofuncs = &(struct nvkm_ofuncs) {
70 .ctor = nv50_fuse_ctor,
71 .dtor = _nvkm_fuse_dtor,
72 .init = _nvkm_fuse_init,
73 .fini = _nvkm_fuse_fini,
74 .rd32 = nv50_fuse_rd32,
75 },
76 };
77