1 /*
2 * Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 * DEALINGS IN THE SOFTWARE.
21 */
22 #include <subdev/ibus.h>
23
24 #include "priv.h"
25
26 static int
27 gp10b_ibus_init(struct nvkm_subdev *ibus)
28 {
29 struct nvkm_device *device = ibus->device;
30
31 nvkm_wr32(device, 0x1200a8, 0x0);
32
33 /* init ring */
34 nvkm_wr32(device, 0x12004c, 0x4);
35 nvkm_wr32(device, 0x122204, 0x2);
36 nvkm_rd32(device, 0x122204);
37
38 /* timeout configuration */
39 nvkm_wr32(device, 0x009080, 0x800186a0);
40
41 return 0;
42 }
43
44 static const struct nvkm_subdev_func
45 gp10b_ibus = {
46 .init = gp10b_ibus_init,
47 .intr = gk104_ibus_intr,
48 };
49
50 int
51 gp10b_ibus_new(struct nvkm_device *device, int index,
52 struct nvkm_subdev **pibus)
53 {
54 struct nvkm_subdev *ibus;
55 if (!(ibus = *pibus = kzalloc(sizeof(*ibus), GFP_KERNEL)))
56 return -ENOMEM;
57 nvkm_subdev_ctor(&gp10b_ibus, device, index, ibus);
58 return 0;
59 }