1/*	$NetBSD: nouveau_nvkm_subdev_bus_nv04.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $	*/
2
3/*
4 * Copyright 2012 Nouveau Community
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Martin Peres <martin.peres@labri.fr>
25 *          Ben Skeggs
26 */
27#include <sys/cdefs.h>
28__KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bus_nv04.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $");
29
30#include "priv.h"
31
32#include <subdev/gpio.h>
33
34static void
35nv04_bus_intr(struct nvkm_bus *bus)
36{
37	struct nvkm_subdev *subdev = &bus->subdev;
38	struct nvkm_device *device = subdev->device;
39	u32 stat = nvkm_rd32(device, 0x001100) & nvkm_rd32(device, 0x001140);
40
41	if (stat & 0x00000001) {
42		nvkm_error(subdev, "BUS ERROR\n");
43		stat &= ~0x00000001;
44		nvkm_wr32(device, 0x001100, 0x00000001);
45	}
46
47	if (stat & 0x00000110) {
48		struct nvkm_gpio *gpio = device->gpio;
49		if (gpio)
50			nvkm_subdev_intr(&gpio->subdev);
51		stat &= ~0x00000110;
52		nvkm_wr32(device, 0x001100, 0x00000110);
53	}
54
55	if (stat) {
56		nvkm_error(subdev, "intr %08x\n", stat);
57		nvkm_mask(device, 0x001140, stat, 0x00000000);
58	}
59}
60
61static void
62nv04_bus_init(struct nvkm_bus *bus)
63{
64	struct nvkm_device *device = bus->subdev.device;
65	nvkm_wr32(device, 0x001100, 0xffffffff);
66	nvkm_wr32(device, 0x001140, 0x00000111);
67}
68
69static const struct nvkm_bus_func
70nv04_bus = {
71	.init = nv04_bus_init,
72	.intr = nv04_bus_intr,
73};
74
75int
76nv04_bus_new(struct nvkm_device *device, int index, struct nvkm_bus **pbus)
77{
78	return nvkm_bus_new_(&nv04_bus, device, index, pbus);
79}
80