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, 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