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