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 #include <subdev/gpio.h>
30 
31 static void
32 nv04_bus_intr(struct nvkm_bus *bus)
33 {
34 	struct nvkm_subdev *subdev = &bus->subdev;
35 	struct nvkm_device *device = subdev->device;
36 	u32 stat = nvkm_rd32(device, 0x001100) & nvkm_rd32(device, 0x001140);
37 
38 	if (stat & 0x00000001) {
39 		nvkm_error(subdev, "BUS ERROR\n");
40 		stat &= ~0x00000001;
41 		nvkm_wr32(device, 0x001100, 0x00000001);
42 	}
43 
44 	if (stat & 0x00000110) {
45 		struct nvkm_gpio *gpio = device->gpio;
46 		if (gpio)
47 			nvkm_subdev_intr(&gpio->subdev);
48 		stat &= ~0x00000110;
49 		nvkm_wr32(device, 0x001100, 0x00000110);
50 	}
51 
52 	if (stat) {
53 		nvkm_error(subdev, "intr %08x\n", stat);
54 		nvkm_mask(device, 0x001140, stat, 0x00000000);
55 	}
56 }
57 
58 static void
59 nv04_bus_init(struct nvkm_bus *bus)
60 {
61 	struct nvkm_device *device = bus->subdev.device;
62 	nvkm_wr32(device, 0x001100, 0xffffffff);
63 	nvkm_wr32(device, 0x001140, 0x00000111);
64 }
65 
66 static const struct nvkm_bus_func
67 nv04_bus = {
68 	.init = nv04_bus_init,
69 	.intr = nv04_bus_intr,
70 };
71 
72 int
73 nv04_bus_new(struct nvkm_device *device, int index, struct nvkm_bus **pbus)
74 {
75 	return nvkm_bus_new_(&nv04_bus, device, index, pbus);
76 }
77