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
26struct gf100_fuse_priv {
27	struct nvkm_fuse base;
28
29	spinlock_t fuse_enable_lock;
30};
31
32static u32
33gf100_fuse_rd32(struct nvkm_object *object, u64 addr)
34{
35	struct gf100_fuse_priv *priv = (void *)object;
36	unsigned long flags;
37	u32 fuse_enable, unk, val;
38
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);
47	return val;
48}
49
50
51static int
52gf100_fuse_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
53		struct nvkm_oclass *oclass, void *data, u32 size,
54		struct nvkm_object **pobject)
55{
56	struct gf100_fuse_priv *priv;
57	int ret;
58
59	ret = nvkm_fuse_create(parent, engine, oclass, &priv);
60	*pobject = nv_object(priv);
61	if (ret)
62		return ret;
63
64	spin_lock_init(&priv->fuse_enable_lock);
65	return 0;
66}
67
68struct nvkm_oclass
69gf100_fuse_oclass = {
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,
77	},
78};
79