nouveau_nvkm_subdev_i2c_base.c revision 1.1
1/* $NetBSD: nouveau_nvkm_subdev_i2c_base.c,v 1.1 2018/08/27 01:34:56 riastradh Exp $ */ 2 3/* 4 * Copyright 2013 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_i2c_base.c,v 1.1 2018/08/27 01:34:56 riastradh Exp $"); 28 29#include "priv.h" 30#include "aux.h" 31#include "bus.h" 32#include "pad.h" 33 34#include <core/notify.h> 35#include <core/option.h> 36#include <subdev/bios.h> 37#include <subdev/bios/dcb.h> 38#include <subdev/bios/i2c.h> 39 40static struct nvkm_i2c_pad * 41nvkm_i2c_pad_find(struct nvkm_i2c *i2c, int id) 42{ 43 struct nvkm_i2c_pad *pad; 44 45 list_for_each_entry(pad, &i2c->pad, head) { 46 if (pad->id == id) 47 return pad; 48 } 49 50 return NULL; 51} 52 53struct nvkm_i2c_bus * 54nvkm_i2c_bus_find(struct nvkm_i2c *i2c, int id) 55{ 56 struct nvkm_bios *bios = i2c->subdev.device->bios; 57 struct nvkm_i2c_bus *bus; 58 59 if (id == NVKM_I2C_BUS_PRI || id == NVKM_I2C_BUS_SEC) { 60 u8 ver, hdr, cnt, len; 61 u16 i2c = dcb_i2c_table(bios, &ver, &hdr, &cnt, &len); 62 if (i2c && ver >= 0x30) { 63 u8 auxidx = nvbios_rd08(bios, i2c + 4); 64 if (id == NVKM_I2C_BUS_PRI) 65 id = NVKM_I2C_BUS_CCB((auxidx & 0x0f) >> 0); 66 else 67 id = NVKM_I2C_BUS_CCB((auxidx & 0xf0) >> 4); 68 } else { 69 id = NVKM_I2C_BUS_CCB(2); 70 } 71 } 72 73 list_for_each_entry(bus, &i2c->bus, head) { 74 if (bus->id == id) 75 return bus; 76 } 77 78 return NULL; 79} 80 81struct nvkm_i2c_aux * 82nvkm_i2c_aux_find(struct nvkm_i2c *i2c, int id) 83{ 84 struct nvkm_i2c_aux *aux; 85 86 list_for_each_entry(aux, &i2c->aux, head) { 87 if (aux->id == id) 88 return aux; 89 } 90 91 return NULL; 92} 93 94static void 95nvkm_i2c_intr_fini(struct nvkm_event *event, int type, int id) 96{ 97 struct nvkm_i2c *i2c = container_of(event, typeof(*i2c), event); 98 struct nvkm_i2c_aux *aux = nvkm_i2c_aux_find(i2c, id); 99 if (aux) 100 i2c->func->aux_mask(i2c, type, aux->intr, 0); 101} 102 103static void 104nvkm_i2c_intr_init(struct nvkm_event *event, int type, int id) 105{ 106 struct nvkm_i2c *i2c = container_of(event, typeof(*i2c), event); 107 struct nvkm_i2c_aux *aux = nvkm_i2c_aux_find(i2c, id); 108 if (aux) 109 i2c->func->aux_mask(i2c, type, aux->intr, aux->intr); 110} 111 112static int 113nvkm_i2c_intr_ctor(struct nvkm_object *object, void *data, u32 size, 114 struct nvkm_notify *notify) 115{ 116 struct nvkm_i2c_ntfy_req *req = data; 117 if (!WARN_ON(size != sizeof(*req))) { 118 notify->size = sizeof(struct nvkm_i2c_ntfy_rep); 119 notify->types = req->mask; 120 notify->index = req->port; 121 return 0; 122 } 123 return -EINVAL; 124} 125 126static const struct nvkm_event_func 127nvkm_i2c_intr_func = { 128 .ctor = nvkm_i2c_intr_ctor, 129 .init = nvkm_i2c_intr_init, 130 .fini = nvkm_i2c_intr_fini, 131}; 132 133static void 134nvkm_i2c_intr(struct nvkm_subdev *subdev) 135{ 136 struct nvkm_i2c *i2c = nvkm_i2c(subdev); 137 struct nvkm_i2c_aux *aux; 138 u32 hi, lo, rq, tx; 139 140 if (!i2c->func->aux_stat) 141 return; 142 143 i2c->func->aux_stat(i2c, &hi, &lo, &rq, &tx); 144 if (!hi && !lo && !rq && !tx) 145 return; 146 147 list_for_each_entry(aux, &i2c->aux, head) { 148 u32 mask = 0; 149 if (hi & aux->intr) mask |= NVKM_I2C_PLUG; 150 if (lo & aux->intr) mask |= NVKM_I2C_UNPLUG; 151 if (rq & aux->intr) mask |= NVKM_I2C_IRQ; 152 if (tx & aux->intr) mask |= NVKM_I2C_DONE; 153 if (mask) { 154 struct nvkm_i2c_ntfy_rep rep = { 155 .mask = mask, 156 }; 157 nvkm_event_send(&i2c->event, rep.mask, aux->id, 158 &rep, sizeof(rep)); 159 } 160 } 161} 162 163static int 164nvkm_i2c_fini(struct nvkm_subdev *subdev, bool suspend) 165{ 166 struct nvkm_i2c *i2c = nvkm_i2c(subdev); 167 struct nvkm_i2c_pad *pad; 168 u32 mask; 169 170 if ((mask = (1 << i2c->func->aux) - 1), i2c->func->aux_stat) { 171 i2c->func->aux_mask(i2c, NVKM_I2C_ANY, mask, 0); 172 i2c->func->aux_stat(i2c, &mask, &mask, &mask, &mask); 173 } 174 175 list_for_each_entry(pad, &i2c->pad, head) { 176 nvkm_i2c_pad_fini(pad); 177 } 178 179 return 0; 180} 181 182static int 183nvkm_i2c_init(struct nvkm_subdev *subdev) 184{ 185 struct nvkm_i2c *i2c = nvkm_i2c(subdev); 186 struct nvkm_i2c_bus *bus; 187 struct nvkm_i2c_pad *pad; 188 189 list_for_each_entry(pad, &i2c->pad, head) { 190 nvkm_i2c_pad_init(pad); 191 } 192 193 list_for_each_entry(bus, &i2c->bus, head) { 194 nvkm_i2c_bus_init(bus); 195 } 196 197 return 0; 198} 199 200static void * 201nvkm_i2c_dtor(struct nvkm_subdev *subdev) 202{ 203 struct nvkm_i2c *i2c = nvkm_i2c(subdev); 204 205 nvkm_event_fini(&i2c->event); 206 207 while (!list_empty(&i2c->aux)) { 208 struct nvkm_i2c_aux *aux = 209 list_first_entry(&i2c->aux, typeof(*aux), head); 210 nvkm_i2c_aux_del(&aux); 211 } 212 213 while (!list_empty(&i2c->bus)) { 214 struct nvkm_i2c_bus *bus = 215 list_first_entry(&i2c->bus, typeof(*bus), head); 216 nvkm_i2c_bus_del(&bus); 217 } 218 219 while (!list_empty(&i2c->pad)) { 220 struct nvkm_i2c_pad *pad = 221 list_first_entry(&i2c->pad, typeof(*pad), head); 222 nvkm_i2c_pad_del(&pad); 223 } 224 225 return i2c; 226} 227 228static const struct nvkm_subdev_func 229nvkm_i2c = { 230 .dtor = nvkm_i2c_dtor, 231 .init = nvkm_i2c_init, 232 .fini = nvkm_i2c_fini, 233 .intr = nvkm_i2c_intr, 234}; 235 236static const struct nvkm_i2c_drv { 237 u8 bios; 238 u8 addr; 239 int (*pad_new)(struct nvkm_i2c_bus *, int id, u8 addr, 240 struct nvkm_i2c_pad **); 241} 242nvkm_i2c_drv[] = { 243 { 0x0d, 0x39, anx9805_pad_new }, 244 { 0x0e, 0x3b, anx9805_pad_new }, 245 {} 246}; 247 248int 249nvkm_i2c_new_(const struct nvkm_i2c_func *func, struct nvkm_device *device, 250 int index, struct nvkm_i2c **pi2c) 251{ 252 struct nvkm_bios *bios = device->bios; 253 struct nvkm_i2c *i2c; 254 struct dcb_i2c_entry ccbE; 255 struct dcb_output dcbE; 256 u8 ver, hdr; 257 int ret, i; 258 259 if (!(i2c = *pi2c = kzalloc(sizeof(*i2c), GFP_KERNEL))) 260 return -ENOMEM; 261 262 nvkm_subdev_ctor(&nvkm_i2c, device, index, 0, &i2c->subdev); 263 i2c->func = func; 264 INIT_LIST_HEAD(&i2c->pad); 265 INIT_LIST_HEAD(&i2c->bus); 266 INIT_LIST_HEAD(&i2c->aux); 267 268 i = -1; 269 while (!dcb_i2c_parse(bios, ++i, &ccbE)) { 270 struct nvkm_i2c_pad *pad = NULL; 271 struct nvkm_i2c_bus *bus = NULL; 272 struct nvkm_i2c_aux *aux = NULL; 273 274 nvkm_debug(&i2c->subdev, "ccb %02x: type %02x drive %02x " 275 "sense %02x share %02x auxch %02x\n", i, ccbE.type, 276 ccbE.drive, ccbE.sense, ccbE.share, ccbE.auxch); 277 278 if (ccbE.share != DCB_I2C_UNUSED) { 279 const int id = NVKM_I2C_PAD_HYBRID(ccbE.share); 280 if (!(pad = nvkm_i2c_pad_find(i2c, id))) 281 ret = func->pad_s_new(i2c, id, &pad); 282 else 283 ret = 0; 284 } else { 285 ret = func->pad_x_new(i2c, NVKM_I2C_PAD_CCB(i), &pad); 286 } 287 288 if (ret) { 289 nvkm_error(&i2c->subdev, "ccb %02x pad, %d\n", i, ret); 290 nvkm_i2c_pad_del(&pad); 291 continue; 292 } 293 294 if (pad->func->bus_new_0 && ccbE.type == DCB_I2C_NV04_BIT) { 295 ret = pad->func->bus_new_0(pad, NVKM_I2C_BUS_CCB(i), 296 ccbE.drive, 297 ccbE.sense, &bus); 298 } else 299 if (pad->func->bus_new_4 && 300 ( ccbE.type == DCB_I2C_NV4E_BIT || 301 ccbE.type == DCB_I2C_NVIO_BIT || 302 (ccbE.type == DCB_I2C_PMGR && 303 ccbE.drive != DCB_I2C_UNUSED))) { 304 ret = pad->func->bus_new_4(pad, NVKM_I2C_BUS_CCB(i), 305 ccbE.drive, &bus); 306 } 307 308 if (ret) { 309 nvkm_error(&i2c->subdev, "ccb %02x bus, %d\n", i, ret); 310 nvkm_i2c_bus_del(&bus); 311 } 312 313 if (pad->func->aux_new_6 && 314 ( ccbE.type == DCB_I2C_NVIO_AUX || 315 (ccbE.type == DCB_I2C_PMGR && 316 ccbE.auxch != DCB_I2C_UNUSED))) { 317 ret = pad->func->aux_new_6(pad, NVKM_I2C_BUS_CCB(i), 318 ccbE.auxch, &aux); 319 } else { 320 ret = 0; 321 } 322 323 if (ret) { 324 nvkm_error(&i2c->subdev, "ccb %02x aux, %d\n", i, ret); 325 nvkm_i2c_aux_del(&aux); 326 } 327 328 if (ccbE.type != DCB_I2C_UNUSED && !bus && !aux) { 329 nvkm_warn(&i2c->subdev, "ccb %02x was ignored\n", i); 330 continue; 331 } 332 } 333 334 i = -1; 335 while (dcb_outp_parse(bios, ++i, &ver, &hdr, &dcbE)) { 336 const struct nvkm_i2c_drv *drv = nvkm_i2c_drv; 337 struct nvkm_i2c_bus *bus; 338 struct nvkm_i2c_pad *pad; 339 340 /* internal outputs handled by native i2c busses (above) */ 341 if (!dcbE.location) 342 continue; 343 344 /* we need an i2c bus to talk to the external encoder */ 345 bus = nvkm_i2c_bus_find(i2c, dcbE.i2c_index); 346 if (!bus) { 347 nvkm_debug(&i2c->subdev, "dcb %02x no bus\n", i); 348 continue; 349 } 350 351 /* ... and a driver for it */ 352 while (drv->pad_new) { 353 if (drv->bios == dcbE.extdev) 354 break; 355 drv++; 356 } 357 358 if (!drv->pad_new) { 359 nvkm_debug(&i2c->subdev, "dcb %02x drv %02x unknown\n", 360 i, dcbE.extdev); 361 continue; 362 } 363 364 /* find/create an instance of the driver */ 365 pad = nvkm_i2c_pad_find(i2c, NVKM_I2C_PAD_EXT(dcbE.extdev)); 366 if (!pad) { 367 const int id = NVKM_I2C_PAD_EXT(dcbE.extdev); 368 ret = drv->pad_new(bus, id, drv->addr, &pad); 369 if (ret) { 370 nvkm_error(&i2c->subdev, "dcb %02x pad, %d\n", 371 i, ret); 372 nvkm_i2c_pad_del(&pad); 373 continue; 374 } 375 } 376 377 /* create any i2c bus / aux channel required by the output */ 378 if (pad->func->aux_new_6 && dcbE.type == DCB_OUTPUT_DP) { 379 const int id = NVKM_I2C_AUX_EXT(dcbE.extdev); 380 struct nvkm_i2c_aux *aux = NULL; 381 ret = pad->func->aux_new_6(pad, id, 0, &aux); 382 if (ret) { 383 nvkm_error(&i2c->subdev, "dcb %02x aux, %d\n", 384 i, ret); 385 nvkm_i2c_aux_del(&aux); 386 } 387 } else 388 if (pad->func->bus_new_4) { 389 const int id = NVKM_I2C_BUS_EXT(dcbE.extdev); 390 struct nvkm_i2c_bus *bus = NULL; 391 ret = pad->func->bus_new_4(pad, id, 0, &bus); 392 if (ret) { 393 nvkm_error(&i2c->subdev, "dcb %02x bus, %d\n", 394 i, ret); 395 nvkm_i2c_bus_del(&bus); 396 } 397 } 398 } 399 400 return nvkm_event_init(&nvkm_i2c_intr_func, 4, i, &i2c->event); 401} 402