1 /* $NetBSD: nouveau_nvkm_subdev_gpio_nv10.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $ */
2
3 /*
4 * Copyright (C) 2009 Francisco Jerez.
5 * All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining
8 * a copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sublicense, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial
17 * portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
22 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
23 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
24 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
25 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 */
28 #include <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_gpio_nv10.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $");
30
31 #include "priv.h"
32
33 static int
nv10_gpio_sense(struct nvkm_gpio * gpio,int line)34 nv10_gpio_sense(struct nvkm_gpio *gpio, int line)
35 {
36 struct nvkm_device *device = gpio->subdev.device;
37 if (line < 2) {
38 line = line * 16;
39 line = nvkm_rd32(device, 0x600818) >> line;
40 return !!(line & 0x0100);
41 } else
42 if (line < 10) {
43 line = (line - 2) * 4;
44 line = nvkm_rd32(device, 0x60081c) >> line;
45 return !!(line & 0x04);
46 } else
47 if (line < 14) {
48 line = (line - 10) * 4;
49 line = nvkm_rd32(device, 0x600850) >> line;
50 return !!(line & 0x04);
51 }
52
53 return -EINVAL;
54 }
55
56 static int
nv10_gpio_drive(struct nvkm_gpio * gpio,int line,int dir,int out)57 nv10_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
58 {
59 struct nvkm_device *device = gpio->subdev.device;
60 u32 reg, mask, data;
61
62 if (line < 2) {
63 line = line * 16;
64 reg = 0x600818;
65 mask = 0x00000011;
66 data = (dir << 4) | out;
67 } else
68 if (line < 10) {
69 line = (line - 2) * 4;
70 reg = 0x60081c;
71 mask = 0x00000003;
72 data = (dir << 1) | out;
73 } else
74 if (line < 14) {
75 line = (line - 10) * 4;
76 reg = 0x600850;
77 mask = 0x00000003;
78 data = (dir << 1) | out;
79 } else {
80 return -EINVAL;
81 }
82
83 nvkm_mask(device, reg, mask << line, data << line);
84 return 0;
85 }
86
87 static void
nv10_gpio_intr_stat(struct nvkm_gpio * gpio,u32 * hi,u32 * lo)88 nv10_gpio_intr_stat(struct nvkm_gpio *gpio, u32 *hi, u32 *lo)
89 {
90 struct nvkm_device *device = gpio->subdev.device;
91 u32 intr = nvkm_rd32(device, 0x001104);
92 u32 stat = nvkm_rd32(device, 0x001144) & intr;
93 *lo = (stat & 0xffff0000) >> 16;
94 *hi = (stat & 0x0000ffff);
95 nvkm_wr32(device, 0x001104, intr);
96 }
97
98 static void
nv10_gpio_intr_mask(struct nvkm_gpio * gpio,u32 type,u32 mask,u32 data)99 nv10_gpio_intr_mask(struct nvkm_gpio *gpio, u32 type, u32 mask, u32 data)
100 {
101 struct nvkm_device *device = gpio->subdev.device;
102 u32 inte = nvkm_rd32(device, 0x001144);
103 if (type & NVKM_GPIO_LO)
104 inte = (inte & ~(mask << 16)) | (data << 16);
105 if (type & NVKM_GPIO_HI)
106 inte = (inte & ~mask) | data;
107 nvkm_wr32(device, 0x001144, inte);
108 }
109
110 static const struct nvkm_gpio_func
111 nv10_gpio = {
112 .lines = 16,
113 .intr_stat = nv10_gpio_intr_stat,
114 .intr_mask = nv10_gpio_intr_mask,
115 .drive = nv10_gpio_drive,
116 .sense = nv10_gpio_sense,
117 };
118
119 int
nv10_gpio_new(struct nvkm_device * device,int index,struct nvkm_gpio ** pgpio)120 nv10_gpio_new(struct nvkm_device *device, int index, struct nvkm_gpio **pgpio)
121 {
122 return nvkm_gpio_new_(&nv10_gpio, device, index, pgpio);
123 }
124