53 lines · c
1/*2 * Copyright 2014 Martin Peres3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: Martin Peres23 */24#include "priv.h"25 26static u3227nv50_fuse_read(struct nvkm_fuse *fuse, u32 addr)28{29 struct nvkm_device *device = fuse->subdev.device;30 unsigned long flags;31 u32 fuse_enable, val;32 33 /* racy if another part of nvkm start writing to this reg */34 spin_lock_irqsave(&fuse->lock, flags);35 fuse_enable = nvkm_mask(device, 0x001084, 0x800, 0x800);36 val = nvkm_rd32(device, 0x021000 + addr);37 nvkm_wr32(device, 0x001084, fuse_enable);38 spin_unlock_irqrestore(&fuse->lock, flags);39 return val;40}41 42static const struct nvkm_fuse_func43nv50_fuse = {44 .read = &nv50_fuse_read,45};46 47int48nv50_fuse_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,49 struct nvkm_fuse **pfuse)50{51 return nvkm_fuse_new_(&nv50_fuse, device, type, inst, pfuse);52}53