1 /* 2 * Copyright 2014 Martin Peres 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * 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 OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Martin Peres 23 */ 24 #include "priv.h" 25 26 struct gf100_fuse_priv { 27 struct nvkm_fuse base; 28 29 spinlock_t fuse_enable_lock; 30 }; 31 32 static u32 33 gf100_fuse_rd32(struct nvkm_object *object, u64 addr) 34 { 35 struct gf100_fuse_priv *priv = (void *)object; 36 unsigned long flags; 37 u32 fuse_enable, unk, val; 38 39 /* racy if another part of nvkm start writing to these regs */ 40 spin_lock_irqsave(&priv->fuse_enable_lock, flags); 41 fuse_enable = nv_mask(priv, 0x22400, 0x800, 0x800); 42 unk = nv_mask(priv, 0x21000, 0x1, 0x1); 43 val = nv_rd32(priv, 0x21100 + addr); 44 nv_wr32(priv, 0x21000, unk); 45 nv_wr32(priv, 0x22400, fuse_enable); 46 spin_unlock_irqrestore(&priv->fuse_enable_lock, flags); 47 return val; 48 } 49 50 51 static int 52 gf100_fuse_ctor(struct nvkm_object *parent, struct nvkm_object *engine, 53 struct nvkm_oclass *oclass, void *data, u32 size, 54 struct nvkm_object **pobject) 55 { 56 struct gf100_fuse_priv *priv; 57 int ret; 58 59 ret = nvkm_fuse_create(parent, engine, oclass, &priv); 60 *pobject = nv_object(priv); 61 if (ret) 62 return ret; 63 64 spin_lock_init(&priv->fuse_enable_lock); 65 return 0; 66 } 67 68 struct nvkm_oclass 69 gf100_fuse_oclass = { 70 .handle = NV_SUBDEV(FUSE, 0xC0), 71 .ofuncs = &(struct nvkm_ofuncs) { 72 .ctor = gf100_fuse_ctor, 73 .dtor = _nvkm_fuse_dtor, 74 .init = _nvkm_fuse_init, 75 .fini = _nvkm_fuse_fini, 76 .rd32 = gf100_fuse_rd32, 77 }, 78 }; 79