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
25 #include "priv.h"
26
27 struct g80_fuse_priv {
28 struct nouveau_fuse base;
29
30 spinlock_t fuse_enable_lock;
31 };
32
33 static u32
g80_fuse_rd32(struct nouveau_object * object,u64 addr)34 g80_fuse_rd32(struct nouveau_object *object, u64 addr)
35 {
36 struct g80_fuse_priv *priv = (void *)object;
37 unsigned long flags;
38 u32 fuse_enable, val;
39
40 spin_lock_irqsave(&priv->fuse_enable_lock, flags);
41
42 /* racy if another part of nouveau start writing to this reg */
43 fuse_enable = nv_mask(priv, 0x1084, 0x800, 0x800);
44 val = nv_rd32(priv, 0x21000 + addr);
45 nv_wr32(priv, 0x1084, fuse_enable);
46
47 spin_unlock_irqrestore(&priv->fuse_enable_lock, flags);
48
49 return val;
50 }
51
52
53 static int
g80_fuse_ctor(struct nouveau_object * parent,struct nouveau_object * engine,struct nouveau_oclass * oclass,void * data,u32 size,struct nouveau_object ** pobject)54 g80_fuse_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
55 struct nouveau_oclass *oclass, void *data, u32 size,
56 struct nouveau_object **pobject)
57 {
58 struct g80_fuse_priv *priv;
59 int ret;
60
61 ret = nouveau_fuse_create(parent, engine, oclass, &priv);
62 *pobject = nv_object(priv);
63 if (ret)
64 return ret;
65
66 spin_lock_init(&priv->fuse_enable_lock);
67
68 return 0;
69 }
70
71 struct nouveau_oclass
72 g80_fuse_oclass = {
73 .handle = NV_SUBDEV(FUSE, 0x50),
74 .ofuncs = &(struct nouveau_ofuncs) {
75 .ctor = g80_fuse_ctor,
76 .dtor = _nouveau_fuse_dtor,
77 .init = _nouveau_fuse_init,
78 .fini = _nouveau_fuse_fini,
79 .rd32 = g80_fuse_rd32,
80 },
81 };
82