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 
26 void
gf119_gpio_reset(struct nvkm_gpio * gpio,u8 match)27 gf119_gpio_reset(struct nvkm_gpio *gpio, u8 match)
28 {
29 	struct nvkm_device *device = gpio->subdev.device;
30 	struct nvkm_bios *bios = device->bios;
31 	u8 ver, len;
32 	u16 entry;
33 	int ent = -1;
34 
35 	while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) {
36 		u32 data = nvbios_rd32(bios, entry);
37 		u8  line =   (data & 0x0000003f);
38 		u8  defs = !!(data & 0x00000080);
39 		u8  func =   (data & 0x0000ff00) >> 8;
40 		u8  unk0 =   (data & 0x00ff0000) >> 16;
41 		u8  unk1 =   (data & 0x1f000000) >> 24;
42 
43 		if ( func  == DCB_GPIO_UNUSED ||
44 		    (match != DCB_GPIO_UNUSED && match != func))
45 			continue;
46 
47 		nvkm_gpio_set(gpio, 0, func, line, defs);
48 
49 		nvkm_mask(device, 0x00d610 + (line * 4), 0xff, unk0);
50 		if (unk1--)
51 			nvkm_mask(device, 0x00d740 + (unk1 * 4), 0xff, line);
52 	}
53 }
54 
55 int
gf119_gpio_drive(struct nvkm_gpio * gpio,int line,int dir,int out)56 gf119_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
57 {
58 	struct nvkm_device *device = gpio->subdev.device;
59 	u32 data = ((dir ^ 1) << 13) | (out << 12);
60 	nvkm_mask(device, 0x00d610 + (line * 4), 0x00003000, data);
61 	nvkm_mask(device, 0x00d604, 0x00000001, 0x00000001); /* update? */
62 	return 0;
63 }
64 
65 int
gf119_gpio_sense(struct nvkm_gpio * gpio,int line)66 gf119_gpio_sense(struct nvkm_gpio *gpio, int line)
67 {
68 	struct nvkm_device *device = gpio->subdev.device;
69 	return !!(nvkm_rd32(device, 0x00d610 + (line * 4)) & 0x00004000);
70 }
71 
72 static const struct nvkm_gpio_func
73 gf119_gpio = {
74 	.lines = 32,
75 	.intr_stat = g94_gpio_intr_stat,
76 	.intr_mask = g94_gpio_intr_mask,
77 	.drive = gf119_gpio_drive,
78 	.sense = gf119_gpio_sense,
79 	.reset = gf119_gpio_reset,
80 };
81 
82 int
gf119_gpio_new(struct nvkm_device * device,enum nvkm_subdev_type type,int inst,struct nvkm_gpio ** pgpio)83 gf119_gpio_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
84 	       struct nvkm_gpio **pgpio)
85 {
86 	return nvkm_gpio_new_(&gf119_gpio, device, type, inst, pgpio);
87 }
88