1c39f472eSBen Skeggs /* 2c39f472eSBen Skeggs * Copyright 2011 Red Hat Inc. 3c39f472eSBen Skeggs * 4c39f472eSBen Skeggs * Permission is hereby granted, free of charge, to any person obtaining a 5c39f472eSBen Skeggs * copy of this software and associated documentation files (the "Software"), 6c39f472eSBen Skeggs * to deal in the Software without restriction, including without limitation 7c39f472eSBen Skeggs * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8c39f472eSBen Skeggs * and/or sell copies of the Software, and to permit persons to whom the 9c39f472eSBen Skeggs * Software is furnished to do so, subject to the following conditions: 10c39f472eSBen Skeggs * 11c39f472eSBen Skeggs * The above copyright notice and this permission notice shall be included in 12c39f472eSBen Skeggs * all copies or substantial portions of the Software. 13c39f472eSBen Skeggs * 14c39f472eSBen Skeggs * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15c39f472eSBen Skeggs * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16c39f472eSBen Skeggs * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17c39f472eSBen Skeggs * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18c39f472eSBen Skeggs * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19c39f472eSBen Skeggs * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20c39f472eSBen Skeggs * OTHER DEALINGS IN THE SOFTWARE. 21c39f472eSBen Skeggs * 22c39f472eSBen Skeggs * Authors: Ben Skeggs 23c39f472eSBen Skeggs */ 24c39f472eSBen Skeggs #include "priv.h" 25c39f472eSBen Skeggs 264e7659fcSBen Skeggs #include <core/notify.h> 274e7659fcSBen Skeggs 28c39f472eSBen Skeggs static int 294e7659fcSBen Skeggs nvkm_gpio_drive(struct nvkm_gpio *gpio, int idx, int line, int dir, int out) 30c39f472eSBen Skeggs { 312ea7249fSBen Skeggs return gpio->func->drive(gpio, line, dir, out); 32c39f472eSBen Skeggs } 33c39f472eSBen Skeggs 34c39f472eSBen Skeggs static int 354e7659fcSBen Skeggs nvkm_gpio_sense(struct nvkm_gpio *gpio, int idx, int line) 36c39f472eSBen Skeggs { 372ea7249fSBen Skeggs return gpio->func->sense(gpio, line); 38c39f472eSBen Skeggs } 39c39f472eSBen Skeggs 402ea7249fSBen Skeggs void 412ea7249fSBen Skeggs nvkm_gpio_reset(struct nvkm_gpio *gpio, u8 func) 422ea7249fSBen Skeggs { 432ea7249fSBen Skeggs if (gpio->func->reset) 442ea7249fSBen Skeggs gpio->func->reset(gpio, func); 452ea7249fSBen Skeggs } 462ea7249fSBen Skeggs 472ea7249fSBen Skeggs int 484e7659fcSBen Skeggs nvkm_gpio_find(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line, 49c39f472eSBen Skeggs struct dcb_gpio_func *func) 50c39f472eSBen Skeggs { 51e7d65181SBen Skeggs struct nvkm_device *device = gpio->subdev.device; 5246484438SBen Skeggs struct nvkm_bios *bios = device->bios; 53c39f472eSBen Skeggs u8 ver, len; 54c39f472eSBen Skeggs u16 data; 55c39f472eSBen Skeggs 56c39f472eSBen Skeggs if (line == 0xff && tag == 0xff) 57c39f472eSBen Skeggs return -EINVAL; 58c39f472eSBen Skeggs 59c39f472eSBen Skeggs data = dcb_gpio_match(bios, idx, tag, line, &ver, &len, func); 60c39f472eSBen Skeggs if (data) 61c39f472eSBen Skeggs return 0; 62c39f472eSBen Skeggs 63c39f472eSBen Skeggs /* Apple iMac G4 NV18 */ 64c7af0ff0SBen Skeggs if (device->quirk && device->quirk->tv_gpio) { 65c39f472eSBen Skeggs if (tag == DCB_GPIO_TVDAC0) { 66c39f472eSBen Skeggs *func = (struct dcb_gpio_func) { 67c39f472eSBen Skeggs .func = DCB_GPIO_TVDAC0, 68c7af0ff0SBen Skeggs .line = device->quirk->tv_gpio, 69c39f472eSBen Skeggs .log[0] = 0, 70c39f472eSBen Skeggs .log[1] = 1, 71c39f472eSBen Skeggs }; 72c39f472eSBen Skeggs return 0; 73c39f472eSBen Skeggs } 74c39f472eSBen Skeggs } 75c39f472eSBen Skeggs 76c39f472eSBen Skeggs return -ENOENT; 77c39f472eSBen Skeggs } 78c39f472eSBen Skeggs 792ea7249fSBen Skeggs int 804e7659fcSBen Skeggs nvkm_gpio_set(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line, int state) 81c39f472eSBen Skeggs { 82c39f472eSBen Skeggs struct dcb_gpio_func func; 83c39f472eSBen Skeggs int ret; 84c39f472eSBen Skeggs 854e7659fcSBen Skeggs ret = nvkm_gpio_find(gpio, idx, tag, line, &func); 86c39f472eSBen Skeggs if (ret == 0) { 87c39f472eSBen Skeggs int dir = !!(func.log[state] & 0x02); 88c39f472eSBen Skeggs int out = !!(func.log[state] & 0x01); 894e7659fcSBen Skeggs ret = nvkm_gpio_drive(gpio, idx, func.line, dir, out); 90c39f472eSBen Skeggs } 91c39f472eSBen Skeggs 92c39f472eSBen Skeggs return ret; 93c39f472eSBen Skeggs } 94c39f472eSBen Skeggs 952ea7249fSBen Skeggs int 964e7659fcSBen Skeggs nvkm_gpio_get(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line) 97c39f472eSBen Skeggs { 98c39f472eSBen Skeggs struct dcb_gpio_func func; 99c39f472eSBen Skeggs int ret; 100c39f472eSBen Skeggs 1014e7659fcSBen Skeggs ret = nvkm_gpio_find(gpio, idx, tag, line, &func); 102c39f472eSBen Skeggs if (ret == 0) { 1034e7659fcSBen Skeggs ret = nvkm_gpio_sense(gpio, idx, func.line); 104c39f472eSBen Skeggs if (ret >= 0) 105c39f472eSBen Skeggs ret = (ret == (func.log[1] & 1)); 106c39f472eSBen Skeggs } 107c39f472eSBen Skeggs 108c39f472eSBen Skeggs return ret; 109c39f472eSBen Skeggs } 110c39f472eSBen Skeggs 111c39f472eSBen Skeggs static void 1124e7659fcSBen Skeggs nvkm_gpio_intr_fini(struct nvkm_event *event, int type, int index) 113c39f472eSBen Skeggs { 1144e7659fcSBen Skeggs struct nvkm_gpio *gpio = container_of(event, typeof(*gpio), event); 1152ea7249fSBen Skeggs gpio->func->intr_mask(gpio, type, 1 << index, 0); 116c39f472eSBen Skeggs } 117c39f472eSBen Skeggs 118c39f472eSBen Skeggs static void 1194e7659fcSBen Skeggs nvkm_gpio_intr_init(struct nvkm_event *event, int type, int index) 120c39f472eSBen Skeggs { 1214e7659fcSBen Skeggs struct nvkm_gpio *gpio = container_of(event, typeof(*gpio), event); 1222ea7249fSBen Skeggs gpio->func->intr_mask(gpio, type, 1 << index, 1 << index); 123c39f472eSBen Skeggs } 124c39f472eSBen Skeggs 125c39f472eSBen Skeggs static int 1264e7659fcSBen Skeggs nvkm_gpio_intr_ctor(struct nvkm_object *object, void *data, u32 size, 127c39f472eSBen Skeggs struct nvkm_notify *notify) 128c39f472eSBen Skeggs { 129c39f472eSBen Skeggs struct nvkm_gpio_ntfy_req *req = data; 130c39f472eSBen Skeggs if (!WARN_ON(size != sizeof(*req))) { 131c39f472eSBen Skeggs notify->size = sizeof(struct nvkm_gpio_ntfy_rep); 132c39f472eSBen Skeggs notify->types = req->mask; 133c39f472eSBen Skeggs notify->index = req->line; 134c39f472eSBen Skeggs return 0; 135c39f472eSBen Skeggs } 136c39f472eSBen Skeggs return -EINVAL; 137c39f472eSBen Skeggs } 138c39f472eSBen Skeggs 1392ea7249fSBen Skeggs static const struct nvkm_event_func 1402ea7249fSBen Skeggs nvkm_gpio_intr_func = { 1412ea7249fSBen Skeggs .ctor = nvkm_gpio_intr_ctor, 1422ea7249fSBen Skeggs .init = nvkm_gpio_intr_init, 1432ea7249fSBen Skeggs .fini = nvkm_gpio_intr_fini, 1442ea7249fSBen Skeggs }; 1452ea7249fSBen Skeggs 146c39f472eSBen Skeggs static void 1474e7659fcSBen Skeggs nvkm_gpio_intr(struct nvkm_subdev *subdev) 148c39f472eSBen Skeggs { 1494e7659fcSBen Skeggs struct nvkm_gpio *gpio = nvkm_gpio(subdev); 150c39f472eSBen Skeggs u32 hi, lo, i; 151c39f472eSBen Skeggs 1522ea7249fSBen Skeggs gpio->func->intr_stat(gpio, &hi, &lo); 153c39f472eSBen Skeggs 1542ea7249fSBen Skeggs for (i = 0; (hi | lo) && i < gpio->func->lines; i++) { 155c39f472eSBen Skeggs struct nvkm_gpio_ntfy_rep rep = { 156c39f472eSBen Skeggs .mask = (NVKM_GPIO_HI * !!(hi & (1 << i))) | 157c39f472eSBen Skeggs (NVKM_GPIO_LO * !!(lo & (1 << i))), 158c39f472eSBen Skeggs }; 159c39f472eSBen Skeggs nvkm_event_send(&gpio->event, rep.mask, i, &rep, sizeof(rep)); 160c39f472eSBen Skeggs } 161c39f472eSBen Skeggs } 162c39f472eSBen Skeggs 1632ea7249fSBen Skeggs static int 1642ea7249fSBen Skeggs nvkm_gpio_fini(struct nvkm_subdev *subdev, bool suspend) 165c39f472eSBen Skeggs { 1662ea7249fSBen Skeggs struct nvkm_gpio *gpio = nvkm_gpio(subdev); 1672ea7249fSBen Skeggs u32 mask = (1 << gpio->func->lines) - 1; 168c39f472eSBen Skeggs 1692ea7249fSBen Skeggs gpio->func->intr_mask(gpio, NVKM_GPIO_TOGGLED, mask, 0); 1702ea7249fSBen Skeggs gpio->func->intr_stat(gpio, &mask, &mask); 1712ea7249fSBen Skeggs return 0; 172c39f472eSBen Skeggs } 173c39f472eSBen Skeggs 174c39f472eSBen Skeggs static struct dmi_system_id gpio_reset_ids[] = { 175c39f472eSBen Skeggs { 176c39f472eSBen Skeggs .ident = "Apple Macbook 10,1", 177c39f472eSBen Skeggs .matches = { 178c39f472eSBen Skeggs DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), 179c39f472eSBen Skeggs DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro10,1"), 180c39f472eSBen Skeggs } 181c39f472eSBen Skeggs }, 182c39f472eSBen Skeggs { } 183c39f472eSBen Skeggs }; 184c39f472eSBen Skeggs 1852ea7249fSBen Skeggs static int 1862ea7249fSBen Skeggs nvkm_gpio_init(struct nvkm_subdev *subdev) 187c39f472eSBen Skeggs { 1882ea7249fSBen Skeggs struct nvkm_gpio *gpio = nvkm_gpio(subdev); 1892ea7249fSBen Skeggs if (dmi_check_system(gpio_reset_ids)) 1902ea7249fSBen Skeggs nvkm_gpio_reset(gpio, DCB_GPIO_UNUSED); 1912ea7249fSBen Skeggs return 0; 192c39f472eSBen Skeggs } 193c39f472eSBen Skeggs 1942ea7249fSBen Skeggs static void * 1952ea7249fSBen Skeggs nvkm_gpio_dtor(struct nvkm_subdev *subdev) 196c39f472eSBen Skeggs { 1972ea7249fSBen Skeggs struct nvkm_gpio *gpio = nvkm_gpio(subdev); 198c39f472eSBen Skeggs nvkm_event_fini(&gpio->event); 1992ea7249fSBen Skeggs return gpio; 200c39f472eSBen Skeggs } 201c39f472eSBen Skeggs 2022ea7249fSBen Skeggs static const struct nvkm_subdev_func 2032ea7249fSBen Skeggs nvkm_gpio = { 2042ea7249fSBen Skeggs .dtor = nvkm_gpio_dtor, 2052ea7249fSBen Skeggs .init = nvkm_gpio_init, 2062ea7249fSBen Skeggs .fini = nvkm_gpio_fini, 2072ea7249fSBen Skeggs .intr = nvkm_gpio_intr, 2082ea7249fSBen Skeggs }; 2092ea7249fSBen Skeggs 210c39f472eSBen Skeggs int 2112ea7249fSBen Skeggs nvkm_gpio_new_(const struct nvkm_gpio_func *func, struct nvkm_device *device, 2122ea7249fSBen Skeggs int index, struct nvkm_gpio **pgpio) 213c39f472eSBen Skeggs { 2144e7659fcSBen Skeggs struct nvkm_gpio *gpio; 215c39f472eSBen Skeggs 2162ea7249fSBen Skeggs if (!(gpio = *pgpio = kzalloc(sizeof(*gpio), GFP_KERNEL))) 2172ea7249fSBen Skeggs return -ENOMEM; 218c39f472eSBen Skeggs 21956d06fa2SBen Skeggs nvkm_subdev_ctor(&nvkm_gpio, device, index, &gpio->subdev); 2202ea7249fSBen Skeggs gpio->func = func; 221c39f472eSBen Skeggs 2222ea7249fSBen Skeggs return nvkm_event_init(&nvkm_gpio_intr_func, 2, func->lines, 223c39f472eSBen Skeggs &gpio->event); 224c39f472eSBen Skeggs } 225