| /* |
| * Copyright 2012 Red Hat Inc. |
| * |
| * 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: Ben Skeggs |
| */ |
| |
| #include <subdev/ltcg.h> |
| |
| struct nvc0_ltcg_priv { |
| struct nouveau_ltcg base; |
| u32 subp_nr; |
| }; |
| |
| static void |
| nvc0_ltcg_subp_isr(struct nvc0_ltcg_priv *priv, int unit, int subp) |
| { |
| u32 subp_base = 0x141000 + (unit * 0x2000) + (subp * 0x400); |
| u32 stat = nv_rd32(priv, subp_base + 0x020); |
| |
| if (stat) { |
| nv_info(priv, "LTC%d_LTS%d: 0x%08x\n", unit, subp, stat); |
| nv_wr32(priv, subp_base + 0x020, stat); |
| } |
| } |
| |
| static void |
| nvc0_ltcg_intr(struct nouveau_subdev *subdev) |
| { |
| struct nvc0_ltcg_priv *priv = (void *)subdev; |
| u32 units; |
| |
| units = nv_rd32(priv, 0x00017c); |
| while (units) { |
| u32 subp, unit = ffs(units) - 1; |
| for (subp = 0; subp < priv->subp_nr; subp++) |
| nvc0_ltcg_subp_isr(priv, unit, subp); |
| units &= ~(1 << unit); |
| } |
| |
| /* we do something horribly wrong and upset PMFB a lot, so mask off |
| * interrupts from it after the first one until it's fixed |
| */ |
| nv_mask(priv, 0x000640, 0x02000000, 0x00000000); |
| } |
| |
| static int |
| nvc0_ltcg_ctor(struct nouveau_object *parent, struct nouveau_object *engine, |
| struct nouveau_oclass *oclass, void *data, u32 size, |
| struct nouveau_object **pobject) |
| { |
| struct nvc0_ltcg_priv *priv; |
| int ret; |
| |
| ret = nouveau_ltcg_create(parent, engine, oclass, &priv); |
| *pobject = nv_object(priv); |
| if (ret) |
| return ret; |
| |
| priv->subp_nr = nv_rd32(priv, 0x17e8dc) >> 24; |
| nv_mask(priv, 0x17e820, 0x00100000, 0x00000000); /* INTR_EN &= ~0x10 */ |
| |
| nv_subdev(priv)->intr = nvc0_ltcg_intr; |
| return 0; |
| } |
| |
| struct nouveau_oclass |
| nvc0_ltcg_oclass = { |
| .handle = NV_SUBDEV(LTCG, 0xc0), |
| .ofuncs = &(struct nouveau_ofuncs) { |
| .ctor = nvc0_ltcg_ctor, |
| .dtor = _nouveau_ltcg_dtor, |
| .init = _nouveau_ltcg_init, |
| .fini = _nouveau_ltcg_fini, |
| }, |
| }; |