55 lines
1.9 KiB
C
55 lines
1.9 KiB
C
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/*
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* Copyright 2014 Martin Peres
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Martin Peres
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*/
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#include "priv.h"
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static u32
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gf100_fuse_read(struct nvkm_fuse *fuse, u32 addr)
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{
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struct nvkm_device *device = fuse->subdev.device;
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unsigned long flags;
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u32 fuse_enable, unk, val;
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/* racy if another part of nvkm start writing to these regs */
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spin_lock_irqsave(&fuse->lock, flags);
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fuse_enable = nvkm_mask(device, 0x022400, 0x800, 0x800);
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unk = nvkm_mask(device, 0x021000, 0x1, 0x1);
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val = nvkm_rd32(device, 0x021100 + addr);
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nvkm_wr32(device, 0x021000, unk);
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nvkm_wr32(device, 0x022400, fuse_enable);
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spin_unlock_irqrestore(&fuse->lock, flags);
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return val;
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}
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static const struct nvkm_fuse_func
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gf100_fuse = {
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.read = gf100_fuse_read,
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};
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int
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gf100_fuse_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
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struct nvkm_fuse **pfuse)
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{
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return nvkm_fuse_new_(&gf100_fuse, device, type, inst, pfuse);
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}
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