mirror of https://gitee.com/openkylin/linux.git
77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/*
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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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struct nv50_fuse {
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struct nvkm_fuse base;
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spinlock_t fuse_enable_lock;
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};
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static u32
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nv50_fuse_rd32(struct nvkm_object *object, u64 addr)
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{
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struct nv50_fuse *fuse = (void *)object;
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unsigned long flags;
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u32 fuse_enable, val;
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/* racy if another part of nvkm start writing to this reg */
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spin_lock_irqsave(&fuse->fuse_enable_lock, flags);
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fuse_enable = nv_mask(fuse, 0x1084, 0x800, 0x800);
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val = nv_rd32(fuse, 0x21000 + addr);
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nv_wr32(fuse, 0x1084, fuse_enable);
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spin_unlock_irqrestore(&fuse->fuse_enable_lock, flags);
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return val;
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}
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static int
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nv50_fuse_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
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struct nvkm_oclass *oclass, void *data, u32 size,
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struct nvkm_object **pobject)
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{
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struct nv50_fuse *fuse;
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int ret;
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ret = nvkm_fuse_create(parent, engine, oclass, &fuse);
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*pobject = nv_object(fuse);
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if (ret)
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return ret;
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spin_lock_init(&fuse->fuse_enable_lock);
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return 0;
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}
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struct nvkm_oclass
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nv50_fuse_oclass = {
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.handle = NV_SUBDEV(FUSE, 0x50),
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.ofuncs = &(struct nvkm_ofuncs) {
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.ctor = nv50_fuse_ctor,
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.dtor = _nvkm_fuse_dtor,
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.init = _nvkm_fuse_init,
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.fini = _nvkm_fuse_fini,
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.rd32 = nv50_fuse_rd32,
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},
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};
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