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 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 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 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 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 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 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