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 #include <subdev/gsp.h>
25
26 static void
ga102_gpio_reset(struct nvkm_gpio * gpio,u8 match)27 ga102_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, 0x021200 + (line * 4), 0xff, unk0);
50 if (unk1--)
51 nvkm_mask(device, 0x00d740 + (unk1 * 4), 0xff, line);
52 }
53 }
54
55 static int
ga102_gpio_drive(struct nvkm_gpio * gpio,int line,int dir,int out)56 ga102_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, 0x021200 + (line * 4), 0x00003000, data);
61 nvkm_mask(device, 0x00d604, 0x00000001, 0x00000001); /* update? */
62 return 0;
63 }
64
65 static int
ga102_gpio_sense(struct nvkm_gpio * gpio,int line)66 ga102_gpio_sense(struct nvkm_gpio *gpio, int line)
67 {
68 struct nvkm_device *device = gpio->subdev.device;
69 return !!(nvkm_rd32(device, 0x021200 + (line * 4)) & 0x00004000);
70 }
71
72 static void
ga102_gpio_intr_stat(struct nvkm_gpio * gpio,u32 * hi,u32 * lo)73 ga102_gpio_intr_stat(struct nvkm_gpio *gpio, u32 *hi, u32 *lo)
74 {
75 struct nvkm_device *device = gpio->subdev.device;
76 u32 intr0 = nvkm_rd32(device, 0x021640);
77 u32 intr1 = nvkm_rd32(device, 0x02164c);
78 u32 stat0 = nvkm_rd32(device, 0x021648) & intr0;
79 u32 stat1 = nvkm_rd32(device, 0x021654) & intr1;
80 *lo = (stat1 & 0xffff0000) | (stat0 >> 16);
81 *hi = (stat1 << 16) | (stat0 & 0x0000ffff);
82 nvkm_wr32(device, 0x021640, intr0);
83 nvkm_wr32(device, 0x02164c, intr1);
84 }
85
86 static void
ga102_gpio_intr_mask(struct nvkm_gpio * gpio,u32 type,u32 mask,u32 data)87 ga102_gpio_intr_mask(struct nvkm_gpio *gpio, u32 type, u32 mask, u32 data)
88 {
89 struct nvkm_device *device = gpio->subdev.device;
90 u32 inte0 = nvkm_rd32(device, 0x021648);
91 u32 inte1 = nvkm_rd32(device, 0x021654);
92 if (type & NVKM_GPIO_LO)
93 inte0 = (inte0 & ~(mask << 16)) | (data << 16);
94 if (type & NVKM_GPIO_HI)
95 inte0 = (inte0 & ~(mask & 0xffff)) | (data & 0xffff);
96 mask >>= 16;
97 data >>= 16;
98 if (type & NVKM_GPIO_LO)
99 inte1 = (inte1 & ~(mask << 16)) | (data << 16);
100 if (type & NVKM_GPIO_HI)
101 inte1 = (inte1 & ~mask) | data;
102 nvkm_wr32(device, 0x021648, inte0);
103 nvkm_wr32(device, 0x021654, inte1);
104 }
105
106 static const struct nvkm_gpio_func
107 ga102_gpio = {
108 .lines = 32,
109 .intr_stat = ga102_gpio_intr_stat,
110 .intr_mask = ga102_gpio_intr_mask,
111 .drive = ga102_gpio_drive,
112 .sense = ga102_gpio_sense,
113 .reset = ga102_gpio_reset,
114 };
115
116 int
ga102_gpio_new(struct nvkm_device * device,enum nvkm_subdev_type type,int inst,struct nvkm_gpio ** pgpio)117 ga102_gpio_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
118 struct nvkm_gpio **pgpio)
119 {
120 if (nvkm_gsp_rm(device->gsp))
121 return -ENODEV;
122
123 return nvkm_gpio_new_(&ga102_gpio, device, type, inst, pgpio);
124 }
125