1 /*
2 * Copyright 2012 Nouveau Community
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 <martin.peres@labri.fr>
23 * Ben Skeggs
24 */
25 #include "priv.h"
26
27 #include <subdev/gpio.h>
28
29 static void
30 nv04_bus_intr(struct nvkm_bus *bus)
31 {
32 struct nvkm_subdev *subdev = &bus->subdev;
33 struct nvkm_device *device = subdev->device;
34 u32 stat = nvkm_rd32(device, 0x001100) & nvkm_rd32(device, 0x001140);
35
36 if (stat & 0x00000001) {
37 nvkm_error(subdev, "BUS ERROR\n");
38 stat &= ~0x00000001;
39 nvkm_wr32(device, 0x001100, 0x00000001);
40 }
41
42 if (stat & 0x00000110) {
43 struct nvkm_gpio *gpio = device->gpio;
44 if (gpio)
45 nvkm_subdev_intr(&gpio->subdev);
46 stat &= ~0x00000110;
47 nvkm_wr32(device, 0x001100, 0x00000110);
48 }
49
50 if (stat) {
51 nvkm_error(subdev, "intr %08x\n", stat);
52 nvkm_mask(device, 0x001140, stat, 0x00000000);
53 }
54 }
55
56 static void
57 nv04_bus_init(struct nvkm_bus *bus)
58 {
59 struct nvkm_device *device = bus->subdev.device;
60 nvkm_wr32(device, 0x001100, 0xffffffff);
61 nvkm_wr32(device, 0x001140, 0x00000111);
62 }
63
64 static const struct nvkm_bus_func
65 nv04_bus = {
66 .init = nv04_bus_init,
67 .intr = nv04_bus_intr,
68 };
69
70 int
71 nv04_bus_new(struct nvkm_device *device, int index, struct nvkm_bus **pbus)
72 {
73 return nvkm_bus_new_(&nv04_bus, device, index, pbus);
74 }