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/*
* 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"
struct gf100_fuse_priv {
struct nvkm_fuse base;
spinlock_t fuse_enable_lock;
};
static u32
gf100_fuse_rd32(struct nvkm_object *object, u64 addr)
{
struct gf100_fuse_priv *priv = (void *)object;
unsigned long flags;
u32 fuse_enable, unk, val;
/* racy if another part of nvkm start writing to these regs */
spin_lock_irqsave(&priv->fuse_enable_lock, flags);
fuse_enable = nv_mask(priv, 0x22400, 0x800, 0x800);
unk = nv_mask(priv, 0x21000, 0x1, 0x1);
val = nv_rd32(priv, 0x21100 + addr);
nv_wr32(priv, 0x21000, unk);
nv_wr32(priv, 0x22400, fuse_enable);
spin_unlock_irqrestore(&priv->fuse_enable_lock, flags);
return val;
}
static int
gf100_fuse_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
struct nvkm_oclass *oclass, void *data, u32 size,
struct nvkm_object **pobject)
{
struct gf100_fuse_priv *priv;
int ret;
ret = nvkm_fuse_create(parent, engine, oclass, &priv);
*pobject = nv_object(priv);
if (ret)
return ret;
spin_lock_init(&priv->fuse_enable_lock);
return 0;
}
struct nvkm_oclass
gf100_fuse_oclass = {
.handle = NV_SUBDEV(FUSE, 0xC0),
.ofuncs = &(struct nvkm_ofuncs) {
.ctor = gf100_fuse_ctor,
.dtor = _nvkm_fuse_dtor,
.init = _nvkm_fuse_init,
.fini = _nvkm_fuse_fini,
.rd32 = gf100_fuse_rd32,
},
};
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