1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Driver for Intel PMC USB mux control 4 * 5 * Copyright (C) 2020 Intel Corporation 6 * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com> 7 */ 8 9 #include <linux/acpi.h> 10 #include <linux/module.h> 11 #include <linux/platform_device.h> 12 #include <linux/property.h> 13 #include <linux/usb/pd.h> 14 #include <linux/usb/role.h> 15 #include <linux/usb/typec_mux.h> 16 #include <linux/usb/typec_dp.h> 17 #include <linux/usb/typec_tbt.h> 18 19 #include <asm/intel_scu_ipc.h> 20 21 #define PMC_USBC_CMD 0xa7 22 23 /* Response status bits */ 24 #define PMC_USB_RESP_STATUS_FAILURE BIT(0) 25 #define PMC_USB_RESP_STATUS_FATAL BIT(1) 26 27 /* "Usage" OOB Message field values */ 28 enum { 29 PMC_USB_CONNECT, 30 PMC_USB_DISCONNECT, 31 PMC_USB_SAFE_MODE, 32 PMC_USB_ALT_MODE, 33 PMC_USB_DP_HPD, 34 }; 35 36 #define PMC_USB_MSG_USB2_PORT_SHIFT 0 37 #define PMC_USB_MSG_USB3_PORT_SHIFT 4 38 #define PMC_USB_MSG_UFP_SHIFT 4 39 #define PMC_USB_MSG_ORI_HSL_SHIFT 5 40 #define PMC_USB_MSG_ORI_AUX_SHIFT 6 41 42 /* Alt Mode Request */ 43 struct altmode_req { 44 u8 usage; 45 u8 mode_type; 46 u8 mode_id; 47 u8 reserved; 48 u32 mode_data; 49 } __packed; 50 51 #define PMC_USB_MODE_TYPE_SHIFT 4 52 53 enum { 54 PMC_USB_MODE_TYPE_USB, 55 PMC_USB_MODE_TYPE_DP, 56 PMC_USB_MODE_TYPE_TBT, 57 }; 58 59 /* Common Mode Data bits */ 60 #define PMC_USB_ALTMODE_ACTIVE_CABLE BIT(2) 61 62 #define PMC_USB_ALTMODE_ORI_SHIFT 1 63 #define PMC_USB_ALTMODE_UFP_SHIFT 3 64 65 /* DP specific Mode Data bits */ 66 #define PMC_USB_ALTMODE_DP_MODE_SHIFT 8 67 68 /* TBT specific Mode Data bits */ 69 #define PMC_USB_ALTMODE_TBT_TYPE BIT(17) 70 #define PMC_USB_ALTMODE_CABLE_TYPE BIT(18) 71 #define PMC_USB_ALTMODE_ACTIVE_LINK BIT(20) 72 #define PMC_USB_ALTMODE_FORCE_LSR BIT(23) 73 #define PMC_USB_ALTMODE_CABLE_SPD(_s_) (((_s_) & GENMASK(2, 0)) << 25) 74 #define PMC_USB_ALTMODE_CABLE_USB31 1 75 #define PMC_USB_ALTMODE_CABLE_10GPS 2 76 #define PMC_USB_ALTMODE_CABLE_20GPS 3 77 #define PMC_USB_ALTMODE_TBT_GEN(_g_) (((_g_) & GENMASK(1, 0)) << 28) 78 79 /* Display HPD Request bits */ 80 #define PMC_USB_DP_HPD_LVL BIT(4) 81 #define PMC_USB_DP_HPD_IRQ BIT(5) 82 83 /* 84 * Input Output Manager (IOM) PORT STATUS 85 */ 86 #define IOM_PORT_STATUS_ACTIVITY_TYPE_MASK GENMASK(9, 6) 87 #define IOM_PORT_STATUS_ACTIVITY_TYPE_SHIFT 6 88 #define IOM_PORT_STATUS_ACTIVITY_TYPE_USB 0x03 89 /* activity type: Safe Mode */ 90 #define IOM_PORT_STATUS_ACTIVITY_TYPE_SAFE_MODE 0x04 91 /* activity type: Display Port */ 92 #define IOM_PORT_STATUS_ACTIVITY_TYPE_DP 0x05 93 /* activity type: Display Port Multi Function Device */ 94 #define IOM_PORT_STATUS_ACTIVITY_TYPE_DP_MFD 0x06 95 /* activity type: Thunderbolt */ 96 #define IOM_PORT_STATUS_ACTIVITY_TYPE_TBT 0x07 97 #define IOM_PORT_STATUS_ACTIVITY_TYPE_ALT_MODE_USB 0x0c 98 #define IOM_PORT_STATUS_ACTIVITY_TYPE_ALT_MODE_TBT_USB 0x0d 99 /* Upstream Facing Port Information */ 100 #define IOM_PORT_STATUS_UFP BIT(10) 101 /* Display Port Hot Plug Detect status */ 102 #define IOM_PORT_STATUS_DHPD_HPD_STATUS_MASK GENMASK(13, 12) 103 #define IOM_PORT_STATUS_DHPD_HPD_STATUS_SHIFT 12 104 #define IOM_PORT_STATUS_DHPD_HPD_STATUS_ASSERT 0x01 105 #define IOM_PORT_STATUS_DHPD_HPD_SOURCE_TBT BIT(14) 106 #define IOM_PORT_STATUS_CONNECTED BIT(31) 107 108 #define IOM_PORT_ACTIVITY_IS(_status_, _type_) \ 109 ((((_status_) & IOM_PORT_STATUS_ACTIVITY_TYPE_MASK) >> \ 110 IOM_PORT_STATUS_ACTIVITY_TYPE_SHIFT) == \ 111 (IOM_PORT_STATUS_ACTIVITY_TYPE_##_type_)) 112 113 #define IOM_PORT_HPD_ASSERTED(_status_) \ 114 ((((_status_) & IOM_PORT_STATUS_DHPD_HPD_STATUS_MASK) >> \ 115 IOM_PORT_STATUS_DHPD_HPD_STATUS_SHIFT) & \ 116 IOM_PORT_STATUS_DHPD_HPD_STATUS_ASSERT) 117 118 struct pmc_usb; 119 120 struct pmc_usb_port { 121 int num; 122 u32 iom_status; 123 struct pmc_usb *pmc; 124 struct typec_mux *typec_mux; 125 struct typec_switch *typec_sw; 126 struct usb_role_switch *usb_sw; 127 128 enum typec_orientation orientation; 129 enum usb_role role; 130 131 u8 usb2_port; 132 u8 usb3_port; 133 134 enum typec_orientation sbu_orientation; 135 enum typec_orientation hsl_orientation; 136 }; 137 138 struct pmc_usb { 139 u8 num_ports; 140 struct device *dev; 141 struct intel_scu_ipc_dev *ipc; 142 struct pmc_usb_port *port; 143 struct acpi_device *iom_adev; 144 void __iomem *iom_base; 145 u32 iom_port_status_offset; 146 }; 147 148 static void update_port_status(struct pmc_usb_port *port) 149 { 150 u8 port_num; 151 152 /* SoC expects the USB Type-C port numbers to start with 0 */ 153 port_num = port->usb3_port - 1; 154 155 port->iom_status = readl(port->pmc->iom_base + 156 port->pmc->iom_port_status_offset + 157 port_num * sizeof(u32)); 158 } 159 160 static int sbu_orientation(struct pmc_usb_port *port) 161 { 162 if (port->sbu_orientation) 163 return port->sbu_orientation - 1; 164 165 return port->orientation - 1; 166 } 167 168 static int hsl_orientation(struct pmc_usb_port *port) 169 { 170 if (port->hsl_orientation) 171 return port->hsl_orientation - 1; 172 173 return port->orientation - 1; 174 } 175 176 static int pmc_usb_command(struct pmc_usb_port *port, u8 *msg, u32 len) 177 { 178 u8 response[4]; 179 u8 status_res; 180 int ret; 181 182 /* 183 * Error bit will always be 0 with the USBC command. 184 * Status can be checked from the response message if the 185 * function intel_scu_ipc_dev_command succeeds. 186 */ 187 ret = intel_scu_ipc_dev_command(port->pmc->ipc, PMC_USBC_CMD, 0, msg, 188 len, response, sizeof(response)); 189 190 if (ret) 191 return ret; 192 193 status_res = (msg[0] & 0xf) < PMC_USB_SAFE_MODE ? 194 response[2] : response[1]; 195 196 if (status_res & PMC_USB_RESP_STATUS_FAILURE) { 197 if (status_res & PMC_USB_RESP_STATUS_FATAL) 198 return -EIO; 199 200 return -EBUSY; 201 } 202 203 return 0; 204 } 205 206 static int 207 pmc_usb_mux_dp_hpd(struct pmc_usb_port *port, struct typec_displayport_data *dp) 208 { 209 u8 msg[2] = { }; 210 int ret; 211 212 msg[0] = PMC_USB_DP_HPD; 213 msg[0] |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT; 214 215 /* Configure HPD first if HPD,IRQ comes together */ 216 if (!IOM_PORT_HPD_ASSERTED(port->iom_status) && 217 dp->status & DP_STATUS_IRQ_HPD && 218 dp->status & DP_STATUS_HPD_STATE) { 219 msg[1] = PMC_USB_DP_HPD_LVL; 220 ret = pmc_usb_command(port, msg, sizeof(msg)); 221 if (ret) 222 return ret; 223 } 224 225 if (dp->status & DP_STATUS_IRQ_HPD) 226 msg[1] = PMC_USB_DP_HPD_IRQ; 227 228 if (dp->status & DP_STATUS_HPD_STATE) 229 msg[1] |= PMC_USB_DP_HPD_LVL; 230 231 return pmc_usb_command(port, msg, sizeof(msg)); 232 } 233 234 static int 235 pmc_usb_mux_dp(struct pmc_usb_port *port, struct typec_mux_state *state) 236 { 237 struct typec_displayport_data *data = state->data; 238 struct altmode_req req = { }; 239 int ret; 240 241 if (IOM_PORT_ACTIVITY_IS(port->iom_status, DP) || 242 IOM_PORT_ACTIVITY_IS(port->iom_status, DP_MFD)) { 243 if (IOM_PORT_HPD_ASSERTED(port->iom_status) && 244 (!(data->status & DP_STATUS_IRQ_HPD) && 245 data->status & DP_STATUS_HPD_STATE)) 246 return 0; 247 248 return pmc_usb_mux_dp_hpd(port, state->data); 249 } 250 251 req.usage = PMC_USB_ALT_MODE; 252 req.usage |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT; 253 req.mode_type = PMC_USB_MODE_TYPE_DP << PMC_USB_MODE_TYPE_SHIFT; 254 255 req.mode_data = (port->orientation - 1) << PMC_USB_ALTMODE_ORI_SHIFT; 256 req.mode_data |= (port->role - 1) << PMC_USB_ALTMODE_UFP_SHIFT; 257 258 req.mode_data |= (state->mode - TYPEC_STATE_MODAL) << 259 PMC_USB_ALTMODE_DP_MODE_SHIFT; 260 261 ret = pmc_usb_command(port, (void *)&req, sizeof(req)); 262 if (ret) 263 return ret; 264 265 if (data->status & (DP_STATUS_IRQ_HPD | DP_STATUS_HPD_STATE)) 266 return pmc_usb_mux_dp_hpd(port, state->data); 267 268 return 0; 269 } 270 271 static int 272 pmc_usb_mux_tbt(struct pmc_usb_port *port, struct typec_mux_state *state) 273 { 274 struct typec_thunderbolt_data *data = state->data; 275 u8 cable_rounded = TBT_CABLE_ROUNDED_SUPPORT(data->cable_mode); 276 u8 cable_speed = TBT_CABLE_SPEED(data->cable_mode); 277 struct altmode_req req = { }; 278 279 if (IOM_PORT_ACTIVITY_IS(port->iom_status, TBT) || 280 IOM_PORT_ACTIVITY_IS(port->iom_status, ALT_MODE_TBT_USB)) 281 return 0; 282 283 req.usage = PMC_USB_ALT_MODE; 284 req.usage |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT; 285 req.mode_type = PMC_USB_MODE_TYPE_TBT << PMC_USB_MODE_TYPE_SHIFT; 286 287 req.mode_data = (port->orientation - 1) << PMC_USB_ALTMODE_ORI_SHIFT; 288 req.mode_data |= (port->role - 1) << PMC_USB_ALTMODE_UFP_SHIFT; 289 290 if (TBT_ADAPTER(data->device_mode) == TBT_ADAPTER_TBT3) 291 req.mode_data |= PMC_USB_ALTMODE_TBT_TYPE; 292 293 if (data->cable_mode & TBT_CABLE_OPTICAL) 294 req.mode_data |= PMC_USB_ALTMODE_CABLE_TYPE; 295 296 if (data->cable_mode & TBT_CABLE_LINK_TRAINING) 297 req.mode_data |= PMC_USB_ALTMODE_ACTIVE_LINK; 298 299 if (data->enter_vdo & TBT_ENTER_MODE_ACTIVE_CABLE) 300 req.mode_data |= PMC_USB_ALTMODE_ACTIVE_CABLE; 301 302 req.mode_data |= PMC_USB_ALTMODE_CABLE_SPD(cable_speed); 303 304 req.mode_data |= PMC_USB_ALTMODE_TBT_GEN(cable_rounded); 305 306 return pmc_usb_command(port, (void *)&req, sizeof(req)); 307 } 308 309 static int 310 pmc_usb_mux_usb4(struct pmc_usb_port *port, struct typec_mux_state *state) 311 { 312 struct enter_usb_data *data = state->data; 313 struct altmode_req req = { }; 314 u8 cable_speed; 315 316 if (IOM_PORT_ACTIVITY_IS(port->iom_status, TBT) || 317 IOM_PORT_ACTIVITY_IS(port->iom_status, ALT_MODE_TBT_USB)) 318 return 0; 319 320 req.usage = PMC_USB_ALT_MODE; 321 req.usage |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT; 322 req.mode_type = PMC_USB_MODE_TYPE_TBT << PMC_USB_MODE_TYPE_SHIFT; 323 324 /* USB4 Mode */ 325 req.mode_data = PMC_USB_ALTMODE_FORCE_LSR; 326 327 if (data->active_link_training) 328 req.mode_data |= PMC_USB_ALTMODE_ACTIVE_LINK; 329 330 req.mode_data |= (port->orientation - 1) << PMC_USB_ALTMODE_ORI_SHIFT; 331 req.mode_data |= (port->role - 1) << PMC_USB_ALTMODE_UFP_SHIFT; 332 333 switch ((data->eudo & EUDO_CABLE_TYPE_MASK) >> EUDO_CABLE_TYPE_SHIFT) { 334 case EUDO_CABLE_TYPE_PASSIVE: 335 break; 336 case EUDO_CABLE_TYPE_OPTICAL: 337 req.mode_data |= PMC_USB_ALTMODE_CABLE_TYPE; 338 fallthrough; 339 default: 340 req.mode_data |= PMC_USB_ALTMODE_ACTIVE_CABLE; 341 342 /* Configure data rate to rounded in the case of Active TBT3 343 * and USB4 cables. 344 */ 345 req.mode_data |= PMC_USB_ALTMODE_TBT_GEN(1); 346 break; 347 } 348 349 cable_speed = (data->eudo & EUDO_CABLE_SPEED_MASK) >> EUDO_CABLE_SPEED_SHIFT; 350 req.mode_data |= PMC_USB_ALTMODE_CABLE_SPD(cable_speed); 351 352 return pmc_usb_command(port, (void *)&req, sizeof(req)); 353 } 354 355 static int pmc_usb_mux_safe_state(struct pmc_usb_port *port) 356 { 357 u8 msg; 358 359 if (IOM_PORT_ACTIVITY_IS(port->iom_status, SAFE_MODE)) 360 return 0; 361 362 msg = PMC_USB_SAFE_MODE; 363 msg |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT; 364 365 return pmc_usb_command(port, &msg, sizeof(msg)); 366 } 367 368 static int pmc_usb_disconnect(struct pmc_usb_port *port) 369 { 370 struct typec_displayport_data data = { }; 371 u8 msg[2]; 372 373 if (!(port->iom_status & IOM_PORT_STATUS_CONNECTED)) 374 return 0; 375 376 /* Clear DisplayPort HPD if it's still asserted. */ 377 if (IOM_PORT_HPD_ASSERTED(port->iom_status)) 378 pmc_usb_mux_dp_hpd(port, &data); 379 380 msg[0] = PMC_USB_DISCONNECT; 381 msg[0] |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT; 382 383 msg[1] = port->usb2_port << PMC_USB_MSG_USB2_PORT_SHIFT; 384 385 return pmc_usb_command(port, msg, sizeof(msg)); 386 } 387 388 static int pmc_usb_connect(struct pmc_usb_port *port, enum usb_role role) 389 { 390 u8 ufp = role == USB_ROLE_DEVICE ? 1 : 0; 391 u8 msg[2]; 392 int ret; 393 394 if (port->orientation == TYPEC_ORIENTATION_NONE) 395 return -EINVAL; 396 397 if (port->iom_status & IOM_PORT_STATUS_CONNECTED) { 398 if (port->role == role || port->role == USB_ROLE_NONE) 399 return 0; 400 401 /* Role swap */ 402 ret = pmc_usb_disconnect(port); 403 if (ret) 404 return ret; 405 } 406 407 msg[0] = PMC_USB_CONNECT; 408 msg[0] |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT; 409 410 msg[1] = port->usb2_port << PMC_USB_MSG_USB2_PORT_SHIFT; 411 msg[1] |= ufp << PMC_USB_MSG_UFP_SHIFT; 412 msg[1] |= hsl_orientation(port) << PMC_USB_MSG_ORI_HSL_SHIFT; 413 msg[1] |= sbu_orientation(port) << PMC_USB_MSG_ORI_AUX_SHIFT; 414 415 return pmc_usb_command(port, msg, sizeof(msg)); 416 } 417 418 static int 419 pmc_usb_mux_set(struct typec_mux *mux, struct typec_mux_state *state) 420 { 421 struct pmc_usb_port *port = typec_mux_get_drvdata(mux); 422 423 update_port_status(port); 424 425 if (port->orientation == TYPEC_ORIENTATION_NONE || port->role == USB_ROLE_NONE) 426 return 0; 427 428 if (state->mode == TYPEC_STATE_SAFE) 429 return pmc_usb_mux_safe_state(port); 430 if (state->mode == TYPEC_STATE_USB) 431 return pmc_usb_connect(port, port->role); 432 433 if (state->alt) { 434 switch (state->alt->svid) { 435 case USB_TYPEC_TBT_SID: 436 return pmc_usb_mux_tbt(port, state); 437 case USB_TYPEC_DP_SID: 438 return pmc_usb_mux_dp(port, state); 439 } 440 } else { 441 switch (state->mode) { 442 case TYPEC_MODE_USB2: 443 /* REVISIT: Try with usb3_port set to 0? */ 444 break; 445 case TYPEC_MODE_USB3: 446 return pmc_usb_connect(port, port->role); 447 case TYPEC_MODE_USB4: 448 return pmc_usb_mux_usb4(port, state); 449 } 450 } 451 452 return -EOPNOTSUPP; 453 } 454 455 static int pmc_usb_set_orientation(struct typec_switch *sw, 456 enum typec_orientation orientation) 457 { 458 struct pmc_usb_port *port = typec_switch_get_drvdata(sw); 459 460 update_port_status(port); 461 462 port->orientation = orientation; 463 464 return 0; 465 } 466 467 static int pmc_usb_set_role(struct usb_role_switch *sw, enum usb_role role) 468 { 469 struct pmc_usb_port *port = usb_role_switch_get_drvdata(sw); 470 int ret; 471 472 update_port_status(port); 473 474 if (role == USB_ROLE_NONE) 475 ret = pmc_usb_disconnect(port); 476 else 477 ret = pmc_usb_connect(port, role); 478 479 port->role = role; 480 481 return ret; 482 } 483 484 static int pmc_usb_register_port(struct pmc_usb *pmc, int index, 485 struct fwnode_handle *fwnode) 486 { 487 struct pmc_usb_port *port = &pmc->port[index]; 488 struct usb_role_switch_desc desc = { }; 489 struct typec_switch_desc sw_desc = { }; 490 struct typec_mux_desc mux_desc = { }; 491 const char *str; 492 int ret; 493 494 ret = fwnode_property_read_u8(fwnode, "usb2-port-number", &port->usb2_port); 495 if (ret) 496 return ret; 497 498 ret = fwnode_property_read_u8(fwnode, "usb3-port-number", &port->usb3_port); 499 if (ret) 500 return ret; 501 502 ret = fwnode_property_read_string(fwnode, "sbu-orientation", &str); 503 if (!ret) 504 port->sbu_orientation = typec_find_orientation(str); 505 506 ret = fwnode_property_read_string(fwnode, "hsl-orientation", &str); 507 if (!ret) 508 port->hsl_orientation = typec_find_orientation(str); 509 510 port->num = index; 511 port->pmc = pmc; 512 513 sw_desc.fwnode = fwnode; 514 sw_desc.drvdata = port; 515 sw_desc.name = fwnode_get_name(fwnode); 516 sw_desc.set = pmc_usb_set_orientation; 517 518 port->typec_sw = typec_switch_register(pmc->dev, &sw_desc); 519 if (IS_ERR(port->typec_sw)) 520 return PTR_ERR(port->typec_sw); 521 522 mux_desc.fwnode = fwnode; 523 mux_desc.drvdata = port; 524 mux_desc.name = fwnode_get_name(fwnode); 525 mux_desc.set = pmc_usb_mux_set; 526 527 port->typec_mux = typec_mux_register(pmc->dev, &mux_desc); 528 if (IS_ERR(port->typec_mux)) { 529 ret = PTR_ERR(port->typec_mux); 530 goto err_unregister_switch; 531 } 532 533 desc.fwnode = fwnode; 534 desc.driver_data = port; 535 desc.name = fwnode_get_name(fwnode); 536 desc.set = pmc_usb_set_role; 537 538 port->usb_sw = usb_role_switch_register(pmc->dev, &desc); 539 if (IS_ERR(port->usb_sw)) { 540 ret = PTR_ERR(port->usb_sw); 541 goto err_unregister_mux; 542 } 543 544 return 0; 545 546 err_unregister_mux: 547 typec_mux_unregister(port->typec_mux); 548 549 err_unregister_switch: 550 typec_switch_unregister(port->typec_sw); 551 552 return ret; 553 } 554 555 static int is_memory(struct acpi_resource *res, void *data) 556 { 557 struct resource r; 558 559 return !acpi_dev_resource_memory(res, &r); 560 } 561 562 /* IOM ACPI IDs and IOM_PORT_STATUS_OFFSET */ 563 static const struct acpi_device_id iom_acpi_ids[] = { 564 /* TigerLake */ 565 { "INTC1072", 0x560, }, 566 567 /* AlderLake */ 568 { "INTC1079", 0x160, }, 569 {} 570 }; 571 572 static int pmc_usb_probe_iom(struct pmc_usb *pmc) 573 { 574 struct list_head resource_list; 575 struct resource_entry *rentry; 576 static const struct acpi_device_id *dev_id; 577 struct acpi_device *adev = NULL; 578 int ret; 579 580 for (dev_id = &iom_acpi_ids[0]; dev_id->id[0]; dev_id++) { 581 if (acpi_dev_present(dev_id->id, NULL, -1)) { 582 pmc->iom_port_status_offset = (u32)dev_id->driver_data; 583 adev = acpi_dev_get_first_match_dev(dev_id->id, NULL, -1); 584 break; 585 } 586 } 587 588 if (!adev) 589 return -ENODEV; 590 591 INIT_LIST_HEAD(&resource_list); 592 ret = acpi_dev_get_resources(adev, &resource_list, is_memory, NULL); 593 if (ret < 0) 594 return ret; 595 596 rentry = list_first_entry_or_null(&resource_list, struct resource_entry, node); 597 if (rentry) 598 pmc->iom_base = devm_ioremap_resource(pmc->dev, rentry->res); 599 600 acpi_dev_free_resource_list(&resource_list); 601 602 if (!pmc->iom_base) { 603 acpi_dev_put(adev); 604 return -ENOMEM; 605 } 606 607 if (IS_ERR(pmc->iom_base)) { 608 acpi_dev_put(adev); 609 return PTR_ERR(pmc->iom_base); 610 } 611 612 pmc->iom_adev = adev; 613 614 return 0; 615 } 616 617 static int pmc_usb_probe(struct platform_device *pdev) 618 { 619 struct fwnode_handle *fwnode = NULL; 620 struct pmc_usb *pmc; 621 int i = 0; 622 int ret; 623 624 pmc = devm_kzalloc(&pdev->dev, sizeof(*pmc), GFP_KERNEL); 625 if (!pmc) 626 return -ENOMEM; 627 628 device_for_each_child_node(&pdev->dev, fwnode) 629 pmc->num_ports++; 630 631 /* The IOM microcontroller has a limitation of max 4 ports. */ 632 if (pmc->num_ports > 4) { 633 dev_err(&pdev->dev, "driver limited to 4 ports\n"); 634 return -ERANGE; 635 } 636 637 pmc->port = devm_kcalloc(&pdev->dev, pmc->num_ports, 638 sizeof(struct pmc_usb_port), GFP_KERNEL); 639 if (!pmc->port) 640 return -ENOMEM; 641 642 pmc->ipc = devm_intel_scu_ipc_dev_get(&pdev->dev); 643 if (!pmc->ipc) 644 return -ENODEV; 645 646 pmc->dev = &pdev->dev; 647 648 ret = pmc_usb_probe_iom(pmc); 649 if (ret) 650 return ret; 651 652 /* 653 * For every physical USB connector (USB2 and USB3 combo) there is a 654 * child ACPI device node under the PMC mux ACPI device object. 655 */ 656 for (i = 0; i < pmc->num_ports; i++) { 657 fwnode = device_get_next_child_node(pmc->dev, fwnode); 658 if (!fwnode) 659 break; 660 661 ret = pmc_usb_register_port(pmc, i, fwnode); 662 if (ret) { 663 fwnode_handle_put(fwnode); 664 goto err_remove_ports; 665 } 666 } 667 668 platform_set_drvdata(pdev, pmc); 669 670 return 0; 671 672 err_remove_ports: 673 for (i = 0; i < pmc->num_ports; i++) { 674 typec_switch_unregister(pmc->port[i].typec_sw); 675 typec_mux_unregister(pmc->port[i].typec_mux); 676 usb_role_switch_unregister(pmc->port[i].usb_sw); 677 } 678 679 acpi_dev_put(pmc->iom_adev); 680 681 return ret; 682 } 683 684 static int pmc_usb_remove(struct platform_device *pdev) 685 { 686 struct pmc_usb *pmc = platform_get_drvdata(pdev); 687 int i; 688 689 for (i = 0; i < pmc->num_ports; i++) { 690 typec_switch_unregister(pmc->port[i].typec_sw); 691 typec_mux_unregister(pmc->port[i].typec_mux); 692 usb_role_switch_unregister(pmc->port[i].usb_sw); 693 } 694 695 acpi_dev_put(pmc->iom_adev); 696 697 return 0; 698 } 699 700 static const struct acpi_device_id pmc_usb_acpi_ids[] = { 701 { "INTC105C", }, 702 { } 703 }; 704 MODULE_DEVICE_TABLE(acpi, pmc_usb_acpi_ids); 705 706 static struct platform_driver pmc_usb_driver = { 707 .driver = { 708 .name = "intel_pmc_usb", 709 .acpi_match_table = ACPI_PTR(pmc_usb_acpi_ids), 710 }, 711 .probe = pmc_usb_probe, 712 .remove = pmc_usb_remove, 713 }; 714 715 module_platform_driver(pmc_usb_driver); 716 717 MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>"); 718 MODULE_LICENSE("GPL v2"); 719 MODULE_DESCRIPTION("Intel PMC USB mux control"); 720