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
29static void
30nv04_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
56static void
57nv04_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
64static const struct nvkm_bus_func
65nv04_bus = {
66	.init = nv04_bus_init,
67	.intr = nv04_bus_intr,
68};
69
70int
71nv04_bus_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
72	     struct nvkm_bus **pbus)
73{
74	return nvkm_bus_new_(&nv04_bus, device, type, inst, pbus);
75}
76