gf100.c revision 3ca6cd435effd1d762217529baaab010f34f8cc8 
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
27struct gf100_fuse_priv {
28	struct nouveau_fuse base;
29
30	spinlock_t fuse_enable_lock;
31};
32
33static u32
34gf100_fuse_rd32(struct nouveau_object *object, u64 addr)
35{
36	struct gf100_fuse_priv *priv = (void *)object;
37	unsigned long flags;
38	u32 fuse_enable, unk, val;
39
40	spin_lock_irqsave(&priv->fuse_enable_lock, flags);
41
42	/* racy if another part of nouveau start writing to these regs */
43	fuse_enable = nv_mask(priv, 0x22400, 0x800, 0x800);
44	unk = nv_mask(priv, 0x21000, 0x1, 0x1);
45	val = nv_rd32(priv, 0x21100 + addr);
46	nv_wr32(priv, 0x21000, unk);
47	nv_wr32(priv, 0x22400, fuse_enable);
48
49	spin_unlock_irqrestore(&priv->fuse_enable_lock, flags);
50
51	return val;
52}
53
54
55static int
56gf100_fuse_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
57	       struct nouveau_oclass *oclass, void *data, u32 size,
58	       struct nouveau_object **pobject)
59{
60	struct gf100_fuse_priv *priv;
61	int ret;
62
63	ret = nouveau_fuse_create(parent, engine, oclass, &priv);
64	*pobject = nv_object(priv);
65	if (ret)
66		return ret;
67
68	spin_lock_init(&priv->fuse_enable_lock);
69
70	return 0;
71}
72
73struct nouveau_oclass
74gf100_fuse_oclass = {
75	.handle = NV_SUBDEV(FUSE, 0xC0),
76	.ofuncs = &(struct nouveau_ofuncs) {
77		.ctor = gf100_fuse_ctor,
78		.dtor = _nouveau_fuse_dtor,
79		.init = _nouveau_fuse_init,
80		.fini = _nouveau_fuse_fini,
81		.rd32 = gf100_fuse_rd32,
82	},
83};
84