| /* |
| * Copyright 2014 Martin Peres |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * Authors: Martin Peres |
| */ |
| #include "priv.h" |
| |
| static u32 |
| nv50_fuse_read(struct nvkm_fuse *fuse, u32 addr) |
| { |
| struct nvkm_device *device = fuse->subdev.device; |
| unsigned long flags; |
| u32 fuse_enable, val; |
| |
| /* racy if another part of nvkm start writing to this reg */ |
| spin_lock_irqsave(&fuse->lock, flags); |
| fuse_enable = nvkm_mask(device, 0x001084, 0x800, 0x800); |
| val = nvkm_rd32(device, 0x021000 + addr); |
| nvkm_wr32(device, 0x001084, fuse_enable); |
| spin_unlock_irqrestore(&fuse->lock, flags); |
| return val; |
| } |
| |
| static const struct nvkm_fuse_func |
| nv50_fuse = { |
| .read = &nv50_fuse_read, |
| }; |
| |
| int |
| nv50_fuse_new(struct nvkm_device *device, int index, struct nvkm_fuse **pfuse) |
| { |
| return nvkm_fuse_new_(&nv50_fuse, device, index, pfuse); |
| } |
