1 /*
2 * Copyright 2021 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 #include "priv.h"
23
24 static void
ga102_gpio_reset(struct nvkm_gpio * gpio,u8 match)25 ga102_gpio_reset(struct nvkm_gpio *gpio, u8 match)
26 {
27 struct nvkm_device *device = gpio->subdev.device;
28 struct nvkm_bios *bios = device->bios;
29 u8 ver, len;
30 u16 entry;
31 int ent = -1;
32
33 while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) {
34 u32 data = nvbios_rd32(bios, entry);
35 u8 line = (data & 0x0000003f);
36 u8 defs = !!(data & 0x00000080);
37 u8 func = (data & 0x0000ff00) >> 8;
38 u8 unk0 = (data & 0x00ff0000) >> 16;
39 u8 unk1 = (data & 0x1f000000) >> 24;
40
41 if ( func == DCB_GPIO_UNUSED ||
42 (match != DCB_GPIO_UNUSED && match != func))
43 continue;
44
45 nvkm_gpio_set(gpio, 0, func, line, defs);
46
47 nvkm_mask(device, 0x021200 + (line * 4), 0xff, unk0);
48 if (unk1--)
49 nvkm_mask(device, 0x00d740 + (unk1 * 4), 0xff, line);
50 }
51 }
52
53 static int
ga102_gpio_drive(struct nvkm_gpio * gpio,int line,int dir,int out)54 ga102_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
55 {
56 struct nvkm_device *device = gpio->subdev.device;
57 u32 data = ((dir ^ 1) << 13) | (out << 12);
58 nvkm_mask(device, 0x021200 + (line * 4), 0x00003000, data);
59 nvkm_mask(device, 0x00d604, 0x00000001, 0x00000001); /* update? */
60 return 0;
61 }
62
63 static int
ga102_gpio_sense(struct nvkm_gpio * gpio,int line)64 ga102_gpio_sense(struct nvkm_gpio *gpio, int line)
65 {
66 struct nvkm_device *device = gpio->subdev.device;
67 return !!(nvkm_rd32(device, 0x021200 + (line * 4)) & 0x00004000);
68 }
69
70 static void
ga102_gpio_intr_stat(struct nvkm_gpio * gpio,u32 * hi,u32 * lo)71 ga102_gpio_intr_stat(struct nvkm_gpio *gpio, u32 *hi, u32 *lo)
72 {
73 struct nvkm_device *device = gpio->subdev.device;
74 u32 intr0 = nvkm_rd32(device, 0x021640);
75 u32 intr1 = nvkm_rd32(device, 0x02164c);
76 u32 stat0 = nvkm_rd32(device, 0x021648) & intr0;
77 u32 stat1 = nvkm_rd32(device, 0x021654) & intr1;
78 *lo = (stat1 & 0xffff0000) | (stat0 >> 16);
79 *hi = (stat1 << 16) | (stat0 & 0x0000ffff);
80 nvkm_wr32(device, 0x021640, intr0);
81 nvkm_wr32(device, 0x02164c, intr1);
82 }
83
84 static void
ga102_gpio_intr_mask(struct nvkm_gpio * gpio,u32 type,u32 mask,u32 data)85 ga102_gpio_intr_mask(struct nvkm_gpio *gpio, u32 type, u32 mask, u32 data)
86 {
87 struct nvkm_device *device = gpio->subdev.device;
88 u32 inte0 = nvkm_rd32(device, 0x021648);
89 u32 inte1 = nvkm_rd32(device, 0x021654);
90 if (type & NVKM_GPIO_LO)
91 inte0 = (inte0 & ~(mask << 16)) | (data << 16);
92 if (type & NVKM_GPIO_HI)
93 inte0 = (inte0 & ~(mask & 0xffff)) | (data & 0xffff);
94 mask >>= 16;
95 data >>= 16;
96 if (type & NVKM_GPIO_LO)
97 inte1 = (inte1 & ~(mask << 16)) | (data << 16);
98 if (type & NVKM_GPIO_HI)
99 inte1 = (inte1 & ~mask) | data;
100 nvkm_wr32(device, 0x021648, inte0);
101 nvkm_wr32(device, 0x021654, inte1);
102 }
103
104 static const struct nvkm_gpio_func
105 ga102_gpio = {
106 .lines = 32,
107 .intr_stat = ga102_gpio_intr_stat,
108 .intr_mask = ga102_gpio_intr_mask,
109 .drive = ga102_gpio_drive,
110 .sense = ga102_gpio_sense,
111 .reset = ga102_gpio_reset,
112 };
113
114 int
ga102_gpio_new(struct nvkm_device * device,enum nvkm_subdev_type type,int inst,struct nvkm_gpio ** pgpio)115 ga102_gpio_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
116 struct nvkm_gpio **pgpio)
117 {
118 return nvkm_gpio_new_(&ga102_gpio, device, type, inst, pgpio);
119 }
120