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3ca6cd43 MP |
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 | */ | |
3ca6cd43 MP |
24 | #include "priv.h" |
25 | ||
3ca6cd43 | 26 | static u32 |
c5fcafa5 | 27 | gf100_fuse_read(struct nvkm_fuse *fuse, u32 addr) |
3ca6cd43 | 28 | { |
c5fcafa5 | 29 | struct nvkm_device *device = fuse->subdev.device; |
3ca6cd43 MP |
30 | unsigned long flags; |
31 | u32 fuse_enable, unk, val; | |
32 | ||
630ec6c0 | 33 | /* racy if another part of nvkm start writing to these regs */ |
c5fcafa5 BS |
34 | spin_lock_irqsave(&fuse->lock, flags); |
35 | fuse_enable = nvkm_mask(device, 0x022400, 0x800, 0x800); | |
36 | unk = nvkm_mask(device, 0x021000, 0x1, 0x1); | |
37 | val = nvkm_rd32(device, 0x021100 + addr); | |
38 | nvkm_wr32(device, 0x021000, unk); | |
39 | nvkm_wr32(device, 0x022400, fuse_enable); | |
40 | spin_unlock_irqrestore(&fuse->lock, flags); | |
3ca6cd43 MP |
41 | return val; |
42 | } | |
43 | ||
7e24c114 | 44 | static const struct nvkm_fuse_func |
c5fcafa5 | 45 | gf100_fuse = { |
7e24c114 BS |
46 | .read = gf100_fuse_read, |
47 | }; | |
3ca6cd43 | 48 | |
c5fcafa5 BS |
49 | int |
50 | gf100_fuse_new(struct nvkm_device *device, int index, struct nvkm_fuse **pfuse) | |
3ca6cd43 | 51 | { |
c5fcafa5 | 52 | return nvkm_fuse_new_(&gf100_fuse, device, index, pfuse); |
3ca6cd43 | 53 | } |