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_dev *typec_mux; 125 struct typec_switch_dev *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_send_command(struct intel_scu_ipc_dev *ipc, 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(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 pmc_usb_command(struct pmc_usb_port *port, u8 *msg, u32 len) 207 { 208 int retry_count = 3; 209 int ret; 210 211 /* 212 * If PMC is busy then retry the command once again 213 */ 214 while (retry_count--) { 215 ret = pmc_usb_send_command(port->pmc->ipc, msg, len); 216 if (ret != -EBUSY) 217 break; 218 } 219 220 return ret; 221 } 222 223 static int 224 pmc_usb_mux_dp_hpd(struct pmc_usb_port *port, struct typec_displayport_data *dp) 225 { 226 u8 msg[2] = { }; 227 int ret; 228 229 msg[0] = PMC_USB_DP_HPD; 230 msg[0] |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT; 231 232 /* Configure HPD first if HPD,IRQ comes together */ 233 if (!IOM_PORT_HPD_ASSERTED(port->iom_status) && 234 dp->status & DP_STATUS_IRQ_HPD && 235 dp->status & DP_STATUS_HPD_STATE) { 236 msg[1] = PMC_USB_DP_HPD_LVL; 237 ret = pmc_usb_command(port, msg, sizeof(msg)); 238 if (ret) 239 return ret; 240 } 241 242 if (dp->status & DP_STATUS_IRQ_HPD) 243 msg[1] = PMC_USB_DP_HPD_IRQ; 244 245 if (dp->status & DP_STATUS_HPD_STATE) 246 msg[1] |= PMC_USB_DP_HPD_LVL; 247 248 return pmc_usb_command(port, msg, sizeof(msg)); 249 } 250 251 static int 252 pmc_usb_mux_dp(struct pmc_usb_port *port, struct typec_mux_state *state) 253 { 254 struct typec_displayport_data *data = state->data; 255 struct altmode_req req = { }; 256 int ret; 257 258 if (IOM_PORT_ACTIVITY_IS(port->iom_status, DP) || 259 IOM_PORT_ACTIVITY_IS(port->iom_status, DP_MFD)) { 260 if (IOM_PORT_HPD_ASSERTED(port->iom_status) && 261 (!(data->status & DP_STATUS_IRQ_HPD) && 262 data->status & DP_STATUS_HPD_STATE)) 263 return 0; 264 265 return pmc_usb_mux_dp_hpd(port, state->data); 266 } 267 268 req.usage = PMC_USB_ALT_MODE; 269 req.usage |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT; 270 req.mode_type = PMC_USB_MODE_TYPE_DP << PMC_USB_MODE_TYPE_SHIFT; 271 272 req.mode_data = (port->orientation - 1) << PMC_USB_ALTMODE_ORI_SHIFT; 273 req.mode_data |= (port->role - 1) << PMC_USB_ALTMODE_UFP_SHIFT; 274 275 req.mode_data |= (state->mode - TYPEC_STATE_MODAL) << 276 PMC_USB_ALTMODE_DP_MODE_SHIFT; 277 278 ret = pmc_usb_command(port, (void *)&req, sizeof(req)); 279 if (ret) 280 return ret; 281 282 if (data->status & (DP_STATUS_IRQ_HPD | DP_STATUS_HPD_STATE)) 283 return pmc_usb_mux_dp_hpd(port, state->data); 284 285 return 0; 286 } 287 288 static int 289 pmc_usb_mux_tbt(struct pmc_usb_port *port, struct typec_mux_state *state) 290 { 291 struct typec_thunderbolt_data *data = state->data; 292 u8 cable_rounded = TBT_CABLE_ROUNDED_SUPPORT(data->cable_mode); 293 u8 cable_speed = TBT_CABLE_SPEED(data->cable_mode); 294 struct altmode_req req = { }; 295 296 if (IOM_PORT_ACTIVITY_IS(port->iom_status, TBT) || 297 IOM_PORT_ACTIVITY_IS(port->iom_status, ALT_MODE_TBT_USB)) 298 return 0; 299 300 req.usage = PMC_USB_ALT_MODE; 301 req.usage |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT; 302 req.mode_type = PMC_USB_MODE_TYPE_TBT << PMC_USB_MODE_TYPE_SHIFT; 303 304 req.mode_data = (port->orientation - 1) << PMC_USB_ALTMODE_ORI_SHIFT; 305 req.mode_data |= (port->role - 1) << PMC_USB_ALTMODE_UFP_SHIFT; 306 307 if (TBT_ADAPTER(data->device_mode) == TBT_ADAPTER_TBT3) 308 req.mode_data |= PMC_USB_ALTMODE_TBT_TYPE; 309 310 if (data->cable_mode & TBT_CABLE_OPTICAL) 311 req.mode_data |= PMC_USB_ALTMODE_CABLE_TYPE; 312 313 if (data->cable_mode & TBT_CABLE_LINK_TRAINING) 314 req.mode_data |= PMC_USB_ALTMODE_ACTIVE_LINK; 315 316 if (data->enter_vdo & TBT_ENTER_MODE_ACTIVE_CABLE) 317 req.mode_data |= PMC_USB_ALTMODE_ACTIVE_CABLE; 318 319 req.mode_data |= PMC_USB_ALTMODE_CABLE_SPD(cable_speed); 320 321 req.mode_data |= PMC_USB_ALTMODE_TBT_GEN(cable_rounded); 322 323 return pmc_usb_command(port, (void *)&req, sizeof(req)); 324 } 325 326 static int 327 pmc_usb_mux_usb4(struct pmc_usb_port *port, struct typec_mux_state *state) 328 { 329 struct enter_usb_data *data = state->data; 330 struct altmode_req req = { }; 331 u8 cable_speed; 332 333 if (IOM_PORT_ACTIVITY_IS(port->iom_status, TBT) || 334 IOM_PORT_ACTIVITY_IS(port->iom_status, ALT_MODE_TBT_USB)) 335 return 0; 336 337 req.usage = PMC_USB_ALT_MODE; 338 req.usage |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT; 339 req.mode_type = PMC_USB_MODE_TYPE_TBT << PMC_USB_MODE_TYPE_SHIFT; 340 341 /* USB4 Mode */ 342 req.mode_data = PMC_USB_ALTMODE_FORCE_LSR; 343 344 if (data->active_link_training) 345 req.mode_data |= PMC_USB_ALTMODE_ACTIVE_LINK; 346 347 req.mode_data |= (port->orientation - 1) << PMC_USB_ALTMODE_ORI_SHIFT; 348 req.mode_data |= (port->role - 1) << PMC_USB_ALTMODE_UFP_SHIFT; 349 350 switch ((data->eudo & EUDO_CABLE_TYPE_MASK) >> EUDO_CABLE_TYPE_SHIFT) { 351 case EUDO_CABLE_TYPE_PASSIVE: 352 break; 353 case EUDO_CABLE_TYPE_OPTICAL: 354 req.mode_data |= PMC_USB_ALTMODE_CABLE_TYPE; 355 fallthrough; 356 default: 357 req.mode_data |= PMC_USB_ALTMODE_ACTIVE_CABLE; 358 359 /* Configure data rate to rounded in the case of Active TBT3 360 * and USB4 cables. 361 */ 362 req.mode_data |= PMC_USB_ALTMODE_TBT_GEN(1); 363 break; 364 } 365 366 cable_speed = (data->eudo & EUDO_CABLE_SPEED_MASK) >> EUDO_CABLE_SPEED_SHIFT; 367 req.mode_data |= PMC_USB_ALTMODE_CABLE_SPD(cable_speed); 368 369 return pmc_usb_command(port, (void *)&req, sizeof(req)); 370 } 371 372 static int pmc_usb_mux_safe_state(struct pmc_usb_port *port, 373 struct typec_mux_state *state) 374 { 375 u8 msg; 376 377 if (IOM_PORT_ACTIVITY_IS(port->iom_status, SAFE_MODE)) 378 return 0; 379 380 if ((IOM_PORT_ACTIVITY_IS(port->iom_status, DP) || 381 IOM_PORT_ACTIVITY_IS(port->iom_status, DP_MFD)) && 382 state->alt && state->alt->svid == USB_TYPEC_DP_SID) 383 return 0; 384 385 if ((IOM_PORT_ACTIVITY_IS(port->iom_status, TBT) || 386 IOM_PORT_ACTIVITY_IS(port->iom_status, ALT_MODE_TBT_USB)) && 387 state->alt && state->alt->svid == USB_TYPEC_TBT_SID) 388 return 0; 389 390 msg = PMC_USB_SAFE_MODE; 391 msg |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT; 392 393 return pmc_usb_command(port, &msg, sizeof(msg)); 394 } 395 396 static int pmc_usb_disconnect(struct pmc_usb_port *port) 397 { 398 struct typec_displayport_data data = { }; 399 u8 msg[2]; 400 401 if (!(port->iom_status & IOM_PORT_STATUS_CONNECTED)) 402 return 0; 403 404 /* Clear DisplayPort HPD if it's still asserted. */ 405 if (IOM_PORT_HPD_ASSERTED(port->iom_status)) 406 pmc_usb_mux_dp_hpd(port, &data); 407 408 msg[0] = PMC_USB_DISCONNECT; 409 msg[0] |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT; 410 411 msg[1] = port->usb2_port << PMC_USB_MSG_USB2_PORT_SHIFT; 412 413 return pmc_usb_command(port, msg, sizeof(msg)); 414 } 415 416 static int pmc_usb_connect(struct pmc_usb_port *port, enum usb_role role) 417 { 418 u8 ufp = role == USB_ROLE_DEVICE ? 1 : 0; 419 u8 msg[2]; 420 int ret; 421 422 if (port->orientation == TYPEC_ORIENTATION_NONE) 423 return -EINVAL; 424 425 if (port->iom_status & IOM_PORT_STATUS_CONNECTED) { 426 if (port->role == role || port->role == USB_ROLE_NONE) 427 return 0; 428 429 /* Role swap */ 430 ret = pmc_usb_disconnect(port); 431 if (ret) 432 return ret; 433 } 434 435 msg[0] = PMC_USB_CONNECT; 436 msg[0] |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT; 437 438 msg[1] = port->usb2_port << PMC_USB_MSG_USB2_PORT_SHIFT; 439 msg[1] |= ufp << PMC_USB_MSG_UFP_SHIFT; 440 msg[1] |= hsl_orientation(port) << PMC_USB_MSG_ORI_HSL_SHIFT; 441 msg[1] |= sbu_orientation(port) << PMC_USB_MSG_ORI_AUX_SHIFT; 442 443 return pmc_usb_command(port, msg, sizeof(msg)); 444 } 445 446 static int 447 pmc_usb_mux_set(struct typec_mux_dev *mux, struct typec_mux_state *state) 448 { 449 struct pmc_usb_port *port = typec_mux_get_drvdata(mux); 450 451 update_port_status(port); 452 453 if (port->orientation == TYPEC_ORIENTATION_NONE || port->role == USB_ROLE_NONE) 454 return 0; 455 456 if (state->mode == TYPEC_STATE_SAFE) 457 return pmc_usb_mux_safe_state(port, state); 458 if (state->mode == TYPEC_STATE_USB) 459 return pmc_usb_connect(port, port->role); 460 461 if (state->alt) { 462 switch (state->alt->svid) { 463 case USB_TYPEC_TBT_SID: 464 return pmc_usb_mux_tbt(port, state); 465 case USB_TYPEC_DP_SID: 466 return pmc_usb_mux_dp(port, state); 467 } 468 } else { 469 switch (state->mode) { 470 case TYPEC_MODE_USB2: 471 /* REVISIT: Try with usb3_port set to 0? */ 472 break; 473 case TYPEC_MODE_USB3: 474 return pmc_usb_connect(port, port->role); 475 case TYPEC_MODE_USB4: 476 return pmc_usb_mux_usb4(port, state); 477 } 478 } 479 480 return -EOPNOTSUPP; 481 } 482 483 static int pmc_usb_set_orientation(struct typec_switch_dev *sw, 484 enum typec_orientation orientation) 485 { 486 struct pmc_usb_port *port = typec_switch_get_drvdata(sw); 487 488 update_port_status(port); 489 490 port->orientation = orientation; 491 492 return 0; 493 } 494 495 static int pmc_usb_set_role(struct usb_role_switch *sw, enum usb_role role) 496 { 497 struct pmc_usb_port *port = usb_role_switch_get_drvdata(sw); 498 int ret; 499 500 update_port_status(port); 501 502 if (role == USB_ROLE_NONE) 503 ret = pmc_usb_disconnect(port); 504 else 505 ret = pmc_usb_connect(port, role); 506 507 port->role = role; 508 509 return ret; 510 } 511 512 static int pmc_usb_register_port(struct pmc_usb *pmc, int index, 513 struct fwnode_handle *fwnode) 514 { 515 struct pmc_usb_port *port = &pmc->port[index]; 516 struct usb_role_switch_desc desc = { }; 517 struct typec_switch_desc sw_desc = { }; 518 struct typec_mux_desc mux_desc = { }; 519 const char *str; 520 int ret; 521 522 ret = fwnode_property_read_u8(fwnode, "usb2-port-number", &port->usb2_port); 523 if (ret) 524 return ret; 525 526 ret = fwnode_property_read_u8(fwnode, "usb3-port-number", &port->usb3_port); 527 if (ret) 528 return ret; 529 530 ret = fwnode_property_read_string(fwnode, "sbu-orientation", &str); 531 if (!ret) 532 port->sbu_orientation = typec_find_orientation(str); 533 534 ret = fwnode_property_read_string(fwnode, "hsl-orientation", &str); 535 if (!ret) 536 port->hsl_orientation = typec_find_orientation(str); 537 538 port->num = index; 539 port->pmc = pmc; 540 541 sw_desc.fwnode = fwnode; 542 sw_desc.drvdata = port; 543 sw_desc.name = fwnode_get_name(fwnode); 544 sw_desc.set = pmc_usb_set_orientation; 545 546 port->typec_sw = typec_switch_register(pmc->dev, &sw_desc); 547 if (IS_ERR(port->typec_sw)) 548 return PTR_ERR(port->typec_sw); 549 550 mux_desc.fwnode = fwnode; 551 mux_desc.drvdata = port; 552 mux_desc.name = fwnode_get_name(fwnode); 553 mux_desc.set = pmc_usb_mux_set; 554 555 port->typec_mux = typec_mux_register(pmc->dev, &mux_desc); 556 if (IS_ERR(port->typec_mux)) { 557 ret = PTR_ERR(port->typec_mux); 558 goto err_unregister_switch; 559 } 560 561 desc.fwnode = fwnode; 562 desc.driver_data = port; 563 desc.name = fwnode_get_name(fwnode); 564 desc.set = pmc_usb_set_role; 565 566 port->usb_sw = usb_role_switch_register(pmc->dev, &desc); 567 if (IS_ERR(port->usb_sw)) { 568 ret = PTR_ERR(port->usb_sw); 569 goto err_unregister_mux; 570 } 571 572 return 0; 573 574 err_unregister_mux: 575 typec_mux_unregister(port->typec_mux); 576 577 err_unregister_switch: 578 typec_switch_unregister(port->typec_sw); 579 580 return ret; 581 } 582 583 /* IOM ACPI IDs and IOM_PORT_STATUS_OFFSET */ 584 static const struct acpi_device_id iom_acpi_ids[] = { 585 /* TigerLake */ 586 { "INTC1072", 0x560, }, 587 588 /* AlderLake */ 589 { "INTC1079", 0x160, }, 590 591 /* Meteor Lake */ 592 { "INTC107A", 0x160, }, 593 {} 594 }; 595 596 static int pmc_usb_probe_iom(struct pmc_usb *pmc) 597 { 598 struct list_head resource_list; 599 struct resource_entry *rentry; 600 static const struct acpi_device_id *dev_id; 601 struct acpi_device *adev = NULL; 602 int ret; 603 604 for (dev_id = &iom_acpi_ids[0]; dev_id->id[0]; dev_id++) { 605 adev = acpi_dev_get_first_match_dev(dev_id->id, NULL, -1); 606 if (adev) 607 break; 608 } 609 if (!adev) 610 return -ENODEV; 611 612 pmc->iom_port_status_offset = (u32)dev_id->driver_data; 613 614 INIT_LIST_HEAD(&resource_list); 615 ret = acpi_dev_get_memory_resources(adev, &resource_list); 616 if (ret < 0) { 617 acpi_dev_put(adev); 618 return ret; 619 } 620 621 rentry = list_first_entry_or_null(&resource_list, struct resource_entry, node); 622 if (rentry) 623 pmc->iom_base = devm_ioremap_resource(pmc->dev, rentry->res); 624 625 acpi_dev_free_resource_list(&resource_list); 626 627 if (!pmc->iom_base) { 628 acpi_dev_put(adev); 629 return -ENOMEM; 630 } 631 632 if (IS_ERR(pmc->iom_base)) { 633 acpi_dev_put(adev); 634 return PTR_ERR(pmc->iom_base); 635 } 636 637 pmc->iom_adev = adev; 638 639 return 0; 640 } 641 642 static int pmc_usb_probe(struct platform_device *pdev) 643 { 644 struct fwnode_handle *fwnode = NULL; 645 struct pmc_usb *pmc; 646 int i = 0; 647 int ret; 648 649 pmc = devm_kzalloc(&pdev->dev, sizeof(*pmc), GFP_KERNEL); 650 if (!pmc) 651 return -ENOMEM; 652 653 device_for_each_child_node(&pdev->dev, fwnode) 654 pmc->num_ports++; 655 656 /* The IOM microcontroller has a limitation of max 4 ports. */ 657 if (pmc->num_ports > 4) { 658 dev_err(&pdev->dev, "driver limited to 4 ports\n"); 659 return -ERANGE; 660 } 661 662 pmc->port = devm_kcalloc(&pdev->dev, pmc->num_ports, 663 sizeof(struct pmc_usb_port), GFP_KERNEL); 664 if (!pmc->port) 665 return -ENOMEM; 666 667 pmc->ipc = devm_intel_scu_ipc_dev_get(&pdev->dev); 668 if (!pmc->ipc) 669 return -ENODEV; 670 671 pmc->dev = &pdev->dev; 672 673 ret = pmc_usb_probe_iom(pmc); 674 if (ret) 675 return ret; 676 677 /* 678 * For every physical USB connector (USB2 and USB3 combo) there is a 679 * child ACPI device node under the PMC mux ACPI device object. 680 */ 681 for (i = 0; i < pmc->num_ports; i++) { 682 fwnode = device_get_next_child_node(pmc->dev, fwnode); 683 if (!fwnode) 684 break; 685 686 ret = pmc_usb_register_port(pmc, i, fwnode); 687 if (ret) { 688 fwnode_handle_put(fwnode); 689 goto err_remove_ports; 690 } 691 } 692 693 platform_set_drvdata(pdev, pmc); 694 695 return 0; 696 697 err_remove_ports: 698 for (i = 0; i < pmc->num_ports; i++) { 699 typec_switch_unregister(pmc->port[i].typec_sw); 700 typec_mux_unregister(pmc->port[i].typec_mux); 701 usb_role_switch_unregister(pmc->port[i].usb_sw); 702 } 703 704 acpi_dev_put(pmc->iom_adev); 705 706 return ret; 707 } 708 709 static int pmc_usb_remove(struct platform_device *pdev) 710 { 711 struct pmc_usb *pmc = platform_get_drvdata(pdev); 712 int i; 713 714 for (i = 0; i < pmc->num_ports; i++) { 715 typec_switch_unregister(pmc->port[i].typec_sw); 716 typec_mux_unregister(pmc->port[i].typec_mux); 717 usb_role_switch_unregister(pmc->port[i].usb_sw); 718 } 719 720 acpi_dev_put(pmc->iom_adev); 721 722 return 0; 723 } 724 725 static const struct acpi_device_id pmc_usb_acpi_ids[] = { 726 { "INTC105C", }, 727 { } 728 }; 729 MODULE_DEVICE_TABLE(acpi, pmc_usb_acpi_ids); 730 731 static struct platform_driver pmc_usb_driver = { 732 .driver = { 733 .name = "intel_pmc_usb", 734 .acpi_match_table = ACPI_PTR(pmc_usb_acpi_ids), 735 }, 736 .probe = pmc_usb_probe, 737 .remove = pmc_usb_remove, 738 }; 739 740 module_platform_driver(pmc_usb_driver); 741 742 MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>"); 743 MODULE_LICENSE("GPL v2"); 744 MODULE_DESCRIPTION("Intel PMC USB mux control"); 745