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 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 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 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 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 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 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