1 /*
2  * Copyright 2012 Red Hat Inc.
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: Ben Skeggs
23  */
24 #include "priv.h"
25 #include "pad.h"
26 
27 void
28 g94_aux_stat(struct nvkm_i2c *i2c, u32 *hi, u32 *lo, u32 *rq, u32 *tx)
29 {
30 	struct nvkm_device *device = i2c->subdev.device;
31 	u32 intr = nvkm_rd32(device, 0x00e06c);
32 	u32 stat = nvkm_rd32(device, 0x00e068) & intr, i;
33 	for (i = 0, *hi = *lo = *rq = *tx = 0; i < 8; i++) {
34 		if ((stat & (1 << (i * 4)))) *hi |= 1 << i;
35 		if ((stat & (2 << (i * 4)))) *lo |= 1 << i;
36 		if ((stat & (4 << (i * 4)))) *rq |= 1 << i;
37 		if ((stat & (8 << (i * 4)))) *tx |= 1 << i;
38 	}
39 	nvkm_wr32(device, 0x00e06c, intr);
40 }
41 
42 void
43 g94_aux_mask(struct nvkm_i2c *i2c, u32 type, u32 mask, u32 data)
44 {
45 	struct nvkm_device *device = i2c->subdev.device;
46 	u32 temp = nvkm_rd32(device, 0x00e068), i;
47 	for (i = 0; i < 8; i++) {
48 		if (mask & (1 << i)) {
49 			if (!(data & (1 << i))) {
50 				temp &= ~(type << (i * 4));
51 				continue;
52 			}
53 			temp |= type << (i * 4);
54 		}
55 	}
56 	nvkm_wr32(device, 0x00e068, temp);
57 }
58 
59 static const struct nvkm_i2c_func
60 g94_i2c = {
61 	.pad_x_new = g94_i2c_pad_x_new,
62 	.pad_s_new = g94_i2c_pad_s_new,
63 	.aux = 4,
64 	.aux_stat = g94_aux_stat,
65 	.aux_mask = g94_aux_mask,
66 };
67 
68 int
69 g94_i2c_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
70 	    struct nvkm_i2c **pi2c)
71 {
72 	return nvkm_i2c_new_(&g94_i2c, device, type, inst, pi2c);
73 }
74