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1/*2 * Copyright 2011 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: Ben Skeggs23 */24#include "priv.h"25 26#include <core/option.h>27 28static int29nvkm_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 34static int35nvkm_gpio_sense(struct nvkm_gpio *gpio, int idx, int line)36{37 return gpio->func->sense(gpio, line);38}39 40void41nvkm_gpio_reset(struct nvkm_gpio *gpio, u8 func)42{43 if (gpio->func->reset)44 gpio->func->reset(gpio, func);45}46 47int48nvkm_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 79int80nvkm_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 95int96nvkm_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 111static void112nvkm_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 118static void119nvkm_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 125static const struct nvkm_event_func126nvkm_gpio_intr_func = {127 .init = nvkm_gpio_intr_init,128 .fini = nvkm_gpio_intr_fini,129};130 131static void132nvkm_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 146static int147nvkm_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 157static 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 168static 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 174static int175nvkm_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 208static void *209nvkm_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 216static const struct nvkm_subdev_func217nvkm_gpio = {218 .dtor = nvkm_gpio_dtor,219 .init = nvkm_gpio_init,220 .fini = nvkm_gpio_fini,221 .intr = nvkm_gpio_intr,222};223 224int225nvkm_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