1 /* $NetBSD: nouveau_nvkm_subdev_gpio_base.c,v 1.4 2021/12/18 23:45:39 riastradh Exp $ */ 2 3 /* 4 * Copyright 2011 Red Hat Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Ben Skeggs 25 */ 26 #include <sys/cdefs.h> 27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_gpio_base.c,v 1.4 2021/12/18 23:45:39 riastradh Exp $"); 28 29 #include "priv.h" 30 31 #include <core/option.h> 32 #include <core/notify.h> 33 34 static int 35 nvkm_gpio_drive(struct nvkm_gpio *gpio, int idx, int line, int dir, int out) 36 { 37 return gpio->func->drive(gpio, line, dir, out); 38 } 39 40 static int 41 nvkm_gpio_sense(struct nvkm_gpio *gpio, int idx, int line) 42 { 43 return gpio->func->sense(gpio, line); 44 } 45 46 void 47 nvkm_gpio_reset(struct nvkm_gpio *gpio, u8 func) 48 { 49 if (gpio->func->reset) 50 gpio->func->reset(gpio, func); 51 } 52 53 int 54 nvkm_gpio_find(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line, 55 struct dcb_gpio_func *func) 56 { 57 struct nvkm_device *device = gpio->subdev.device; 58 struct nvkm_bios *bios = device->bios; 59 u8 ver, len; 60 u16 data; 61 62 if (line == 0xff && tag == 0xff) 63 return -EINVAL; 64 65 data = dcb_gpio_match(bios, idx, tag, line, &ver, &len, func); 66 if (data) 67 return 0; 68 69 /* Apple iMac G4 NV18 */ 70 if (device->quirk && device->quirk->tv_gpio) { 71 if (tag == DCB_GPIO_TVDAC0) { 72 *func = (struct dcb_gpio_func) { 73 .func = DCB_GPIO_TVDAC0, 74 .line = device->quirk->tv_gpio, 75 .log[0] = 0, 76 .log[1] = 1, 77 }; 78 return 0; 79 } 80 } 81 82 return -ENOENT; 83 } 84 85 int 86 nvkm_gpio_set(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line, int state) 87 { 88 struct dcb_gpio_func func; 89 int ret; 90 91 ret = nvkm_gpio_find(gpio, idx, tag, line, &func); 92 if (ret == 0) { 93 int dir = !!(func.log[state] & 0x02); 94 int out = !!(func.log[state] & 0x01); 95 ret = nvkm_gpio_drive(gpio, idx, func.line, dir, out); 96 } 97 98 return ret; 99 } 100 101 int 102 nvkm_gpio_get(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line) 103 { 104 struct dcb_gpio_func func; 105 int ret; 106 107 ret = nvkm_gpio_find(gpio, idx, tag, line, &func); 108 if (ret == 0) { 109 ret = nvkm_gpio_sense(gpio, idx, func.line); 110 if (ret >= 0) 111 ret = (ret == (func.log[1] & 1)); 112 } 113 114 return ret; 115 } 116 117 static void 118 nvkm_gpio_intr_fini(struct nvkm_event *event, int type, int index) 119 { 120 struct nvkm_gpio *gpio = container_of(event, typeof(*gpio), event); 121 gpio->func->intr_mask(gpio, type, 1 << index, 0); 122 } 123 124 static void 125 nvkm_gpio_intr_init(struct nvkm_event *event, int type, int index) 126 { 127 struct nvkm_gpio *gpio = container_of(event, typeof(*gpio), event); 128 gpio->func->intr_mask(gpio, type, 1 << index, 1 << index); 129 } 130 131 static int 132 nvkm_gpio_intr_ctor(struct nvkm_object *object, void *data, u32 size, 133 struct nvkm_notify *notify) 134 { 135 struct nvkm_gpio_ntfy_req *req = data; 136 if (!WARN_ON(size != sizeof(*req))) { 137 notify->size = sizeof(struct nvkm_gpio_ntfy_rep); 138 notify->types = req->mask; 139 notify->index = req->line; 140 return 0; 141 } 142 return -EINVAL; 143 } 144 145 static const struct nvkm_event_func 146 nvkm_gpio_intr_func = { 147 .ctor = nvkm_gpio_intr_ctor, 148 .init = nvkm_gpio_intr_init, 149 .fini = nvkm_gpio_intr_fini, 150 }; 151 152 static void 153 nvkm_gpio_intr(struct nvkm_subdev *subdev) 154 { 155 struct nvkm_gpio *gpio = nvkm_gpio(subdev); 156 u32 hi, lo, i; 157 158 gpio->func->intr_stat(gpio, &hi, &lo); 159 160 for (i = 0; (hi | lo) && i < gpio->func->lines; i++) { 161 struct nvkm_gpio_ntfy_rep rep = { 162 .mask = (NVKM_GPIO_HI * !!(hi & (1 << i))) | 163 (NVKM_GPIO_LO * !!(lo & (1 << i))), 164 }; 165 nvkm_event_send(&gpio->event, rep.mask, i, &rep, sizeof(rep)); 166 } 167 } 168 169 static int 170 nvkm_gpio_fini(struct nvkm_subdev *subdev, bool suspend) 171 { 172 struct nvkm_gpio *gpio = nvkm_gpio(subdev); 173 u32 mask = (1ULL << gpio->func->lines) - 1; 174 175 gpio->func->intr_mask(gpio, NVKM_GPIO_TOGGLED, mask, 0); 176 gpio->func->intr_stat(gpio, &mask, &mask); 177 return 0; 178 } 179 180 static const struct dmi_system_id gpio_reset_ids[] = { 181 { 182 .ident = "Apple Macbook 10,1", 183 .matches = { 184 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 185 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro10,1"), 186 } 187 }, 188 { } 189 }; 190 191 static enum dcb_gpio_func_name power_checks[] = { 192 DCB_GPIO_THERM_EXT_POWER_EVENT, 193 DCB_GPIO_POWER_ALERT, 194 DCB_GPIO_EXT_POWER_LOW, 195 }; 196 197 static int 198 nvkm_gpio_init(struct nvkm_subdev *subdev) 199 { 200 struct nvkm_gpio *gpio = nvkm_gpio(subdev); 201 struct dcb_gpio_func func; 202 int ret; 203 int i; 204 205 if (dmi_check_system(gpio_reset_ids)) 206 nvkm_gpio_reset(gpio, DCB_GPIO_UNUSED); 207 208 if (nvkm_boolopt(subdev->device->cfgopt, "NvPowerChecks", true)) { 209 for (i = 0; i < ARRAY_SIZE(power_checks); ++i) { 210 ret = nvkm_gpio_find(gpio, 0, power_checks[i], 211 DCB_GPIO_UNUSED, &func); 212 if (ret) 213 continue; 214 215 ret = nvkm_gpio_get(gpio, 0, func.func, func.line); 216 if (!ret) 217 continue; 218 219 nvkm_error(&gpio->subdev, 220 "GPU is missing power, check its power " 221 "cables. Boot with " 222 "nouveau.config=NvPowerChecks=0 to " 223 "disable.\n"); 224 return -EINVAL; 225 } 226 } 227 228 return 0; 229 } 230 231 static void * 232 nvkm_gpio_dtor(struct nvkm_subdev *subdev) 233 { 234 struct nvkm_gpio *gpio = nvkm_gpio(subdev); 235 nvkm_event_fini(&gpio->event); 236 return gpio; 237 } 238 239 static const struct nvkm_subdev_func 240 nvkm_gpio = { 241 .dtor = nvkm_gpio_dtor, 242 .init = nvkm_gpio_init, 243 .fini = nvkm_gpio_fini, 244 .intr = nvkm_gpio_intr, 245 }; 246 247 int 248 nvkm_gpio_new_(const struct nvkm_gpio_func *func, struct nvkm_device *device, 249 int index, struct nvkm_gpio **pgpio) 250 { 251 struct nvkm_gpio *gpio; 252 253 if (!(gpio = *pgpio = kzalloc(sizeof(*gpio), GFP_KERNEL))) 254 return -ENOMEM; 255 256 nvkm_subdev_ctor(&nvkm_gpio, device, index, &gpio->subdev); 257 gpio->func = func; 258 259 return nvkm_event_init(&nvkm_gpio_intr_func, 2, func->lines, 260 &gpio->event); 261 } 262
Indexes created Sat Sep 20 22:09:52 GMT 2025