/* * 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, enum nvkm_subdev_type type, int inst, struct nvkm_fuse **pfuse) { return nvkm_fuse_new_(&gf100_fuse, device, type, inst, pfuse); }