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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"
static u32
gf100_fuse_read(struct nvkm_fuse *fuse, u32 addr)
{
struct nvkm_device *device = fuse->subdev.device;
unsigned long flags;
u32 fuse_enable, unk, val;
/* racy if another part of nvkm start writing to these regs */
spin_lock_irqsave(&fuse->lock, flags);
fuse_enable = nvkm_mask(device, 0x022400, 0x800, 0x800);
unk = nvkm_mask(device, 0x021000, 0x1, 0x1);
val = nvkm_rd32(device, 0x021100 + addr);
nvkm_wr32(device, 0x021000, unk);
nvkm_wr32(device, 0x022400, fuse_enable);
spin_unlock_irqrestore(&fuse->lock, flags);
return val;
}
static const struct nvkm_fuse_func
gf100_fuse = {
.read = gf100_fuse_read,
};
int
gf100_fuse_new(struct nvkm_device *device, int index, struct nvkm_fuse **pfuse)
{
return nvkm_fuse_new_(&gf100_fuse, device, index, pfuse);
}
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