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 #include <subdev/therm.h>
29 
30 static void
31 nv31_bus_intr(struct nvkm_bus *bus)
32 {
33 	struct nvkm_subdev *subdev = &bus->subdev;
34 	struct nvkm_device *device = subdev->device;
35 	u32 stat = nvkm_rd32(device, 0x001100) & nvkm_rd32(device, 0x001140);
36 	u32 gpio = nvkm_rd32(device, 0x001104) & nvkm_rd32(device, 0x001144);
37 
38 	if (gpio) {
39 		struct nvkm_gpio *gpio = device->gpio;
40 		if (gpio)
41 			nvkm_subdev_intr(&gpio->subdev);
42 	}
43 
44 	if (stat & 0x00000008) {  /* NV41- */
45 		u32 addr = nvkm_rd32(device, 0x009084);
46 		u32 data = nvkm_rd32(device, 0x009088);
47 
48 		nvkm_error_ratelimited(subdev, "MMIO %s of %08x FAULT at %06x\n",
49 				       (addr & 0x00000002) ? "write" : "read", data,
50 				       (addr & 0x00fffffc));
51 
52 		stat &= ~0x00000008;
53 		nvkm_wr32(device, 0x001100, 0x00000008);
54 	}
55 
56 	if (stat & 0x00070000) {
57 		struct nvkm_therm *therm = device->therm;
58 		if (therm)
59 			nvkm_subdev_intr(&therm->subdev);
60 		stat &= ~0x00070000;
61 		nvkm_wr32(device, 0x001100, 0x00070000);
62 	}
63 
64 	if (stat) {
65 		nvkm_error(subdev, "intr %08x\n", stat);
66 		nvkm_mask(device, 0x001140, stat, 0x00000000);
67 	}
68 }
69 
70 static void
71 nv31_bus_init(struct nvkm_bus *bus)
72 {
73 	struct nvkm_device *device = bus->subdev.device;
74 	nvkm_wr32(device, 0x001100, 0xffffffff);
75 	nvkm_wr32(device, 0x001140, 0x00070008);
76 }
77 
78 static const struct nvkm_bus_func
79 nv31_bus = {
80 	.init = nv31_bus_init,
81 	.intr = nv31_bus_intr,
82 };
83 
84 int
85 nv31_bus_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
86 	     struct nvkm_bus **pbus)
87 {
88 	return nvkm_bus_new_(&nv31_bus, device, type, inst, pbus);
89 }
90