1 /* 2 * Copyright 2011 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 * Authors: Ben Skeggs 23 */ 24 #include "priv.h" 25 26 #include <core/option.h> 27 #include <core/notify.h> 28 29 static int 30 nvkm_gpio_drive(struct nvkm_gpio *gpio, int idx, int line, int dir, int out) 31 { 32 return gpio->func->drive(gpio, line, dir, out); 33 } 34 35 static int 36 nvkm_gpio_sense(struct nvkm_gpio *gpio, int idx, int line) 37 { 38 return gpio->func->sense(gpio, line); 39 } 40 41 void 42 nvkm_gpio_reset(struct nvkm_gpio *gpio, u8 func) 43 { 44 if (gpio->func->reset) 45 gpio->func->reset(gpio, func); 46 } 47 48 int 49 nvkm_gpio_find(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line, 50 struct dcb_gpio_func *func) 51 { 52 struct nvkm_device *device = gpio->subdev.device; 53 struct nvkm_bios *bios = device->bios; 54 u8 ver, len; 55 u16 data; 56 57 if (line == 0xff && tag == 0xff) 58 return -EINVAL; 59 60 data = dcb_gpio_match(bios, idx, tag, line, &ver, &len, func); 61 if (data) 62 return 0; 63 64 /* Apple iMac G4 NV18 */ 65 if (device->quirk && device->quirk->tv_gpio) { 66 if (tag == DCB_GPIO_TVDAC0) { 67 *func = (struct dcb_gpio_func) { 68 .func = DCB_GPIO_TVDAC0, 69 .line = device->quirk->tv_gpio, 70 .log[0] = 0, 71 .log[1] = 1, 72 }; 73 return 0; 74 } 75 } 76 77 return -ENOENT; 78 } 79 80 int 81 nvkm_gpio_set(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line, int state) 82 { 83 struct dcb_gpio_func func; 84 int ret; 85 86 ret = nvkm_gpio_find(gpio, idx, tag, line, &func); 87 if (ret == 0) { 88 int dir = !!(func.log[state] & 0x02); 89 int out = !!(func.log[state] & 0x01); 90 ret = nvkm_gpio_drive(gpio, idx, func.line, dir, out); 91 } 92 93 return ret; 94 } 95 96 int 97 nvkm_gpio_get(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line) 98 { 99 struct dcb_gpio_func func; 100 int ret; 101 102 ret = nvkm_gpio_find(gpio, idx, tag, line, &func); 103 if (ret == 0) { 104 ret = nvkm_gpio_sense(gpio, idx, func.line); 105 if (ret >= 0) 106 ret = (ret == (func.log[1] & 1)); 107 } 108 109 return ret; 110 } 111 112 static void 113 nvkm_gpio_intr_fini(struct nvkm_event *event, int type, int index) 114 { 115 struct nvkm_gpio *gpio = container_of(event, typeof(*gpio), event); 116 gpio->func->intr_mask(gpio, type, 1 << index, 0); 117 } 118 119 static void 120 nvkm_gpio_intr_init(struct nvkm_event *event, int type, int index) 121 { 122 struct nvkm_gpio *gpio = container_of(event, typeof(*gpio), event); 123 gpio->func->intr_mask(gpio, type, 1 << index, 1 << index); 124 } 125 126 static int 127 nvkm_gpio_intr_ctor(struct nvkm_object *object, void *data, u32 size, 128 struct nvkm_notify *notify) 129 { 130 struct nvkm_gpio_ntfy_req *req = data; 131 if (!WARN_ON(size != sizeof(*req))) { 132 notify->size = sizeof(struct nvkm_gpio_ntfy_rep); 133 notify->types = req->mask; 134 notify->index = req->line; 135 return 0; 136 } 137 return -EINVAL; 138 } 139 140 static const struct nvkm_event_func 141 nvkm_gpio_intr_func = { 142 .ctor = nvkm_gpio_intr_ctor, 143 .init = nvkm_gpio_intr_init, 144 .fini = nvkm_gpio_intr_fini, 145 }; 146 147 static void 148 nvkm_gpio_intr(struct nvkm_subdev *subdev) 149 { 150 struct nvkm_gpio *gpio = nvkm_gpio(subdev); 151 u32 hi, lo, i; 152 153 gpio->func->intr_stat(gpio, &hi, &lo); 154 155 for (i = 0; (hi | lo) && i < gpio->func->lines; i++) { 156 struct nvkm_gpio_ntfy_rep rep = { 157 .mask = (NVKM_GPIO_HI * !!(hi & (1 << i))) | 158 (NVKM_GPIO_LO * !!(lo & (1 << i))), 159 }; 160 nvkm_event_send(&gpio->event, rep.mask, i, &rep, sizeof(rep)); 161 } 162 } 163 164 static int 165 nvkm_gpio_fini(struct nvkm_subdev *subdev, bool suspend) 166 { 167 struct nvkm_gpio *gpio = nvkm_gpio(subdev); 168 u32 mask = (1ULL << gpio->func->lines) - 1; 169 170 gpio->func->intr_mask(gpio, NVKM_GPIO_TOGGLED, mask, 0); 171 gpio->func->intr_stat(gpio, &mask, &mask); 172 return 0; 173 } 174 175 static const struct dmi_system_id gpio_reset_ids[] = { 176 { 177 .ident = "Apple Macbook 10,1", 178 .matches = { 179 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 180 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro10,1"), 181 } 182 }, 183 { } 184 }; 185 186 static enum dcb_gpio_func_name power_checks[] = { 187 DCB_GPIO_THERM_EXT_POWER_EVENT, 188 DCB_GPIO_POWER_ALERT, 189 DCB_GPIO_EXT_POWER_LOW, 190 }; 191 192 static int 193 nvkm_gpio_init(struct nvkm_subdev *subdev) 194 { 195 struct nvkm_gpio *gpio = nvkm_gpio(subdev); 196 struct dcb_gpio_func func; 197 int ret; 198 int i; 199 200 if (dmi_check_system(gpio_reset_ids)) 201 nvkm_gpio_reset(gpio, DCB_GPIO_UNUSED); 202 203 if (nvkm_boolopt(subdev->device->cfgopt, "NvPowerChecks", true)) { 204 for (i = 0; i < ARRAY_SIZE(power_checks); ++i) { 205 ret = nvkm_gpio_find(gpio, 0, power_checks[i], 206 DCB_GPIO_UNUSED, &func); 207 if (ret) 208 continue; 209 210 ret = nvkm_gpio_get(gpio, 0, func.func, func.line); 211 if (!ret) 212 continue; 213 214 nvkm_error(&gpio->subdev, 215 "GPU is missing power, check its power " 216 "cables. Boot with " 217 "nouveau.config=NvPowerChecks=0 to " 218 "disable.\n"); 219 return -EINVAL; 220 } 221 } 222 223 return 0; 224 } 225 226 static void * 227 nvkm_gpio_dtor(struct nvkm_subdev *subdev) 228 { 229 struct nvkm_gpio *gpio = nvkm_gpio(subdev); 230 nvkm_event_fini(&gpio->event); 231 return gpio; 232 } 233 234 static const struct nvkm_subdev_func 235 nvkm_gpio = { 236 .dtor = nvkm_gpio_dtor, 237 .init = nvkm_gpio_init, 238 .fini = nvkm_gpio_fini, 239 .intr = nvkm_gpio_intr, 240 }; 241 242 int 243 nvkm_gpio_new_(const struct nvkm_gpio_func *func, struct nvkm_device *device, 244 enum nvkm_subdev_type type, int inst, struct nvkm_gpio **pgpio) 245 { 246 struct nvkm_gpio *gpio; 247 248 if (!(gpio = *pgpio = kzalloc(sizeof(*gpio), GFP_KERNEL))) 249 return -ENOMEM; 250 251 nvkm_subdev_ctor(&nvkm_gpio, device, type, inst, &gpio->subdev); 252 gpio->func = func; 253 254 return nvkm_event_init(&nvkm_gpio_intr_func, 2, func->lines, 255 &gpio->event); 256 } 257