1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2016-2017 Google, Inc 4 * 5 * Fairchild FUSB302 Type-C Chip Driver 6 */ 7 8 #include <linux/debugfs.h> 9 #include <linux/delay.h> 10 #include <linux/errno.h> 11 #include <linux/extcon.h> 12 #include <linux/gpio/consumer.h> 13 #include <linux/i2c.h> 14 #include <linux/interrupt.h> 15 #include <linux/kernel.h> 16 #include <linux/module.h> 17 #include <linux/mutex.h> 18 #include <linux/of_device.h> 19 #include <linux/pinctrl/consumer.h> 20 #include <linux/proc_fs.h> 21 #include <linux/regulator/consumer.h> 22 #include <linux/sched/clock.h> 23 #include <linux/seq_file.h> 24 #include <linux/slab.h> 25 #include <linux/spinlock.h> 26 #include <linux/string.h> 27 #include <linux/types.h> 28 #include <linux/usb.h> 29 #include <linux/usb/typec.h> 30 #include <linux/usb/tcpm.h> 31 #include <linux/usb/pd.h> 32 #include <linux/workqueue.h> 33 34 #include "fusb302_reg.h" 35 36 /* 37 * When the device is SNK, BC_LVL interrupt is used to monitor cc pins 38 * for the current capability offered by the SRC. As FUSB302 chip fires 39 * the BC_LVL interrupt on PD signalings, cc lvl should be handled after 40 * a delay to avoid measuring on PD activities. The delay is slightly 41 * longer than PD_T_PD_DEBPUNCE (10-20ms). 42 */ 43 #define T_BC_LVL_DEBOUNCE_DELAY_MS 30 44 45 enum toggling_mode { 46 TOGGLING_MODE_OFF, 47 TOGGLING_MODE_DRP, 48 TOGGLING_MODE_SNK, 49 TOGGLING_MODE_SRC, 50 }; 51 52 enum src_current_status { 53 SRC_CURRENT_DEFAULT, 54 SRC_CURRENT_MEDIUM, 55 SRC_CURRENT_HIGH, 56 }; 57 58 static const u8 ra_mda_value[] = { 59 [SRC_CURRENT_DEFAULT] = 4, /* 210mV */ 60 [SRC_CURRENT_MEDIUM] = 9, /* 420mV */ 61 [SRC_CURRENT_HIGH] = 18, /* 798mV */ 62 }; 63 64 static const u8 rd_mda_value[] = { 65 [SRC_CURRENT_DEFAULT] = 38, /* 1638mV */ 66 [SRC_CURRENT_MEDIUM] = 38, /* 1638mV */ 67 [SRC_CURRENT_HIGH] = 61, /* 2604mV */ 68 }; 69 70 #define LOG_BUFFER_ENTRIES 1024 71 #define LOG_BUFFER_ENTRY_SIZE 128 72 73 struct fusb302_chip { 74 struct device *dev; 75 struct i2c_client *i2c_client; 76 struct tcpm_port *tcpm_port; 77 struct tcpc_dev tcpc_dev; 78 79 struct regulator *vbus; 80 81 spinlock_t irq_lock; 82 struct work_struct irq_work; 83 bool irq_suspended; 84 bool irq_while_suspended; 85 struct gpio_desc *gpio_int_n; 86 int gpio_int_n_irq; 87 struct extcon_dev *extcon; 88 89 struct workqueue_struct *wq; 90 struct delayed_work bc_lvl_handler; 91 92 /* lock for sharing chip states */ 93 struct mutex lock; 94 95 /* chip status */ 96 enum toggling_mode toggling_mode; 97 enum src_current_status src_current_status; 98 bool intr_togdone; 99 bool intr_bc_lvl; 100 bool intr_comp_chng; 101 102 /* port status */ 103 bool vconn_on; 104 bool vbus_on; 105 bool charge_on; 106 bool vbus_present; 107 enum typec_cc_polarity cc_polarity; 108 enum typec_cc_status cc1; 109 enum typec_cc_status cc2; 110 u32 snk_pdo[PDO_MAX_OBJECTS]; 111 112 #ifdef CONFIG_DEBUG_FS 113 struct dentry *dentry; 114 /* lock for log buffer access */ 115 struct mutex logbuffer_lock; 116 int logbuffer_head; 117 int logbuffer_tail; 118 u8 *logbuffer[LOG_BUFFER_ENTRIES]; 119 #endif 120 }; 121 122 /* 123 * Logging 124 */ 125 126 #ifdef CONFIG_DEBUG_FS 127 static bool fusb302_log_full(struct fusb302_chip *chip) 128 { 129 return chip->logbuffer_tail == 130 (chip->logbuffer_head + 1) % LOG_BUFFER_ENTRIES; 131 } 132 133 __printf(2, 0) 134 static void _fusb302_log(struct fusb302_chip *chip, const char *fmt, 135 va_list args) 136 { 137 char tmpbuffer[LOG_BUFFER_ENTRY_SIZE]; 138 u64 ts_nsec = local_clock(); 139 unsigned long rem_nsec; 140 141 if (!chip->logbuffer[chip->logbuffer_head]) { 142 chip->logbuffer[chip->logbuffer_head] = 143 kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL); 144 if (!chip->logbuffer[chip->logbuffer_head]) 145 return; 146 } 147 148 vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args); 149 150 mutex_lock(&chip->logbuffer_lock); 151 152 if (fusb302_log_full(chip)) { 153 chip->logbuffer_head = max(chip->logbuffer_head - 1, 0); 154 strlcpy(tmpbuffer, "overflow", sizeof(tmpbuffer)); 155 } 156 157 if (chip->logbuffer_head < 0 || 158 chip->logbuffer_head >= LOG_BUFFER_ENTRIES) { 159 dev_warn(chip->dev, 160 "Bad log buffer index %d\n", chip->logbuffer_head); 161 goto abort; 162 } 163 164 if (!chip->logbuffer[chip->logbuffer_head]) { 165 dev_warn(chip->dev, 166 "Log buffer index %d is NULL\n", chip->logbuffer_head); 167 goto abort; 168 } 169 170 rem_nsec = do_div(ts_nsec, 1000000000); 171 scnprintf(chip->logbuffer[chip->logbuffer_head], 172 LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s", 173 (unsigned long)ts_nsec, rem_nsec / 1000, 174 tmpbuffer); 175 chip->logbuffer_head = (chip->logbuffer_head + 1) % LOG_BUFFER_ENTRIES; 176 177 abort: 178 mutex_unlock(&chip->logbuffer_lock); 179 } 180 181 static void fusb302_log(struct fusb302_chip *chip, const char *fmt, ...) 182 { 183 va_list args; 184 185 va_start(args, fmt); 186 _fusb302_log(chip, fmt, args); 187 va_end(args); 188 } 189 190 static int fusb302_debug_show(struct seq_file *s, void *v) 191 { 192 struct fusb302_chip *chip = (struct fusb302_chip *)s->private; 193 int tail; 194 195 mutex_lock(&chip->logbuffer_lock); 196 tail = chip->logbuffer_tail; 197 while (tail != chip->logbuffer_head) { 198 seq_printf(s, "%s\n", chip->logbuffer[tail]); 199 tail = (tail + 1) % LOG_BUFFER_ENTRIES; 200 } 201 if (!seq_has_overflowed(s)) 202 chip->logbuffer_tail = tail; 203 mutex_unlock(&chip->logbuffer_lock); 204 205 return 0; 206 } 207 DEFINE_SHOW_ATTRIBUTE(fusb302_debug); 208 209 static void fusb302_debugfs_init(struct fusb302_chip *chip) 210 { 211 char name[NAME_MAX]; 212 213 mutex_init(&chip->logbuffer_lock); 214 snprintf(name, NAME_MAX, "fusb302-%s", dev_name(chip->dev)); 215 chip->dentry = debugfs_create_file(name, S_IFREG | 0444, usb_debug_root, 216 chip, &fusb302_debug_fops); 217 } 218 219 static void fusb302_debugfs_exit(struct fusb302_chip *chip) 220 { 221 debugfs_remove(chip->dentry); 222 } 223 224 #else 225 226 static void fusb302_log(const struct fusb302_chip *chip, 227 const char *fmt, ...) { } 228 static void fusb302_debugfs_init(const struct fusb302_chip *chip) { } 229 static void fusb302_debugfs_exit(const struct fusb302_chip *chip) { } 230 231 #endif 232 233 static int fusb302_i2c_write(struct fusb302_chip *chip, 234 u8 address, u8 data) 235 { 236 int ret = 0; 237 238 ret = i2c_smbus_write_byte_data(chip->i2c_client, address, data); 239 if (ret < 0) 240 fusb302_log(chip, "cannot write 0x%02x to 0x%02x, ret=%d", 241 data, address, ret); 242 243 return ret; 244 } 245 246 static int fusb302_i2c_block_write(struct fusb302_chip *chip, u8 address, 247 u8 length, const u8 *data) 248 { 249 int ret = 0; 250 251 if (length <= 0) 252 return ret; 253 254 ret = i2c_smbus_write_i2c_block_data(chip->i2c_client, address, 255 length, data); 256 if (ret < 0) 257 fusb302_log(chip, "cannot block write 0x%02x, len=%d, ret=%d", 258 address, length, ret); 259 260 return ret; 261 } 262 263 static int fusb302_i2c_read(struct fusb302_chip *chip, 264 u8 address, u8 *data) 265 { 266 int ret = 0; 267 268 ret = i2c_smbus_read_byte_data(chip->i2c_client, address); 269 *data = (u8)ret; 270 if (ret < 0) 271 fusb302_log(chip, "cannot read %02x, ret=%d", address, ret); 272 273 return ret; 274 } 275 276 static int fusb302_i2c_block_read(struct fusb302_chip *chip, u8 address, 277 u8 length, u8 *data) 278 { 279 int ret = 0; 280 281 if (length <= 0) 282 return ret; 283 284 ret = i2c_smbus_read_i2c_block_data(chip->i2c_client, address, 285 length, data); 286 if (ret < 0) { 287 fusb302_log(chip, "cannot block read 0x%02x, len=%d, ret=%d", 288 address, length, ret); 289 goto done; 290 } 291 if (ret != length) { 292 fusb302_log(chip, "only read %d/%d bytes from 0x%02x", 293 ret, length, address); 294 ret = -EIO; 295 } 296 297 done: 298 return ret; 299 } 300 301 static int fusb302_i2c_mask_write(struct fusb302_chip *chip, u8 address, 302 u8 mask, u8 value) 303 { 304 int ret = 0; 305 u8 data; 306 307 ret = fusb302_i2c_read(chip, address, &data); 308 if (ret < 0) 309 return ret; 310 data &= ~mask; 311 data |= value; 312 ret = fusb302_i2c_write(chip, address, data); 313 if (ret < 0) 314 return ret; 315 316 return ret; 317 } 318 319 static int fusb302_i2c_set_bits(struct fusb302_chip *chip, u8 address, 320 u8 set_bits) 321 { 322 return fusb302_i2c_mask_write(chip, address, 0x00, set_bits); 323 } 324 325 static int fusb302_i2c_clear_bits(struct fusb302_chip *chip, u8 address, 326 u8 clear_bits) 327 { 328 return fusb302_i2c_mask_write(chip, address, clear_bits, 0x00); 329 } 330 331 static int fusb302_sw_reset(struct fusb302_chip *chip) 332 { 333 int ret = 0; 334 335 ret = fusb302_i2c_write(chip, FUSB_REG_RESET, 336 FUSB_REG_RESET_SW_RESET); 337 if (ret < 0) 338 fusb302_log(chip, "cannot sw reset the chip, ret=%d", ret); 339 else 340 fusb302_log(chip, "sw reset"); 341 342 return ret; 343 } 344 345 static int fusb302_enable_tx_auto_retries(struct fusb302_chip *chip) 346 { 347 int ret = 0; 348 349 ret = fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL3, 350 FUSB_REG_CONTROL3_N_RETRIES_3 | 351 FUSB_REG_CONTROL3_AUTO_RETRY); 352 353 return ret; 354 } 355 356 /* 357 * initialize interrupt on the chip 358 * - unmasked interrupt: VBUS_OK 359 */ 360 static int fusb302_init_interrupt(struct fusb302_chip *chip) 361 { 362 int ret = 0; 363 364 ret = fusb302_i2c_write(chip, FUSB_REG_MASK, 365 0xFF & ~FUSB_REG_MASK_VBUSOK); 366 if (ret < 0) 367 return ret; 368 ret = fusb302_i2c_write(chip, FUSB_REG_MASKA, 0xFF); 369 if (ret < 0) 370 return ret; 371 ret = fusb302_i2c_write(chip, FUSB_REG_MASKB, 0xFF); 372 if (ret < 0) 373 return ret; 374 ret = fusb302_i2c_clear_bits(chip, FUSB_REG_CONTROL0, 375 FUSB_REG_CONTROL0_INT_MASK); 376 if (ret < 0) 377 return ret; 378 379 return ret; 380 } 381 382 static int fusb302_set_power_mode(struct fusb302_chip *chip, u8 power_mode) 383 { 384 int ret = 0; 385 386 ret = fusb302_i2c_write(chip, FUSB_REG_POWER, power_mode); 387 388 return ret; 389 } 390 391 static int tcpm_init(struct tcpc_dev *dev) 392 { 393 struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, 394 tcpc_dev); 395 int ret = 0; 396 u8 data; 397 398 ret = fusb302_sw_reset(chip); 399 if (ret < 0) 400 return ret; 401 ret = fusb302_enable_tx_auto_retries(chip); 402 if (ret < 0) 403 return ret; 404 ret = fusb302_init_interrupt(chip); 405 if (ret < 0) 406 return ret; 407 ret = fusb302_set_power_mode(chip, FUSB_REG_POWER_PWR_ALL); 408 if (ret < 0) 409 return ret; 410 ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &data); 411 if (ret < 0) 412 return ret; 413 chip->vbus_present = !!(data & FUSB_REG_STATUS0_VBUSOK); 414 ret = fusb302_i2c_read(chip, FUSB_REG_DEVICE_ID, &data); 415 if (ret < 0) 416 return ret; 417 fusb302_log(chip, "fusb302 device ID: 0x%02x", data); 418 419 return ret; 420 } 421 422 static int tcpm_get_vbus(struct tcpc_dev *dev) 423 { 424 struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, 425 tcpc_dev); 426 int ret = 0; 427 428 mutex_lock(&chip->lock); 429 ret = chip->vbus_present ? 1 : 0; 430 mutex_unlock(&chip->lock); 431 432 return ret; 433 } 434 435 static int tcpm_get_current_limit(struct tcpc_dev *dev) 436 { 437 struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, 438 tcpc_dev); 439 int current_limit = 0; 440 unsigned long timeout; 441 442 if (!chip->extcon) 443 return 0; 444 445 /* 446 * USB2 Charger detection may still be in progress when we get here, 447 * this can take upto 600ms, wait 800ms max. 448 */ 449 timeout = jiffies + msecs_to_jiffies(800); 450 do { 451 if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_SDP) == 1) 452 current_limit = 500; 453 454 if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_CDP) == 1 || 455 extcon_get_state(chip->extcon, EXTCON_CHG_USB_ACA) == 1) 456 current_limit = 1500; 457 458 if (extcon_get_state(chip->extcon, EXTCON_CHG_USB_DCP) == 1) 459 current_limit = 2000; 460 461 msleep(50); 462 } while (current_limit == 0 && time_before(jiffies, timeout)); 463 464 return current_limit; 465 } 466 467 static int fusb302_set_src_current(struct fusb302_chip *chip, 468 enum src_current_status status) 469 { 470 int ret = 0; 471 472 chip->src_current_status = status; 473 switch (status) { 474 case SRC_CURRENT_DEFAULT: 475 ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0, 476 FUSB_REG_CONTROL0_HOST_CUR_MASK, 477 FUSB_REG_CONTROL0_HOST_CUR_DEF); 478 break; 479 case SRC_CURRENT_MEDIUM: 480 ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0, 481 FUSB_REG_CONTROL0_HOST_CUR_MASK, 482 FUSB_REG_CONTROL0_HOST_CUR_MED); 483 break; 484 case SRC_CURRENT_HIGH: 485 ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL0, 486 FUSB_REG_CONTROL0_HOST_CUR_MASK, 487 FUSB_REG_CONTROL0_HOST_CUR_HIGH); 488 break; 489 default: 490 break; 491 } 492 493 return ret; 494 } 495 496 static int fusb302_set_toggling(struct fusb302_chip *chip, 497 enum toggling_mode mode) 498 { 499 int ret = 0; 500 501 /* first disable toggling */ 502 ret = fusb302_i2c_clear_bits(chip, FUSB_REG_CONTROL2, 503 FUSB_REG_CONTROL2_TOGGLE); 504 if (ret < 0) 505 return ret; 506 /* mask interrupts for SRC or SNK */ 507 ret = fusb302_i2c_set_bits(chip, FUSB_REG_MASK, 508 FUSB_REG_MASK_BC_LVL | 509 FUSB_REG_MASK_COMP_CHNG); 510 if (ret < 0) 511 return ret; 512 chip->intr_bc_lvl = false; 513 chip->intr_comp_chng = false; 514 /* configure toggling mode: none/snk/src/drp */ 515 switch (mode) { 516 case TOGGLING_MODE_OFF: 517 ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2, 518 FUSB_REG_CONTROL2_MODE_MASK, 519 FUSB_REG_CONTROL2_MODE_NONE); 520 if (ret < 0) 521 return ret; 522 break; 523 case TOGGLING_MODE_SNK: 524 ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2, 525 FUSB_REG_CONTROL2_MODE_MASK, 526 FUSB_REG_CONTROL2_MODE_UFP); 527 if (ret < 0) 528 return ret; 529 break; 530 case TOGGLING_MODE_SRC: 531 ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2, 532 FUSB_REG_CONTROL2_MODE_MASK, 533 FUSB_REG_CONTROL2_MODE_DFP); 534 if (ret < 0) 535 return ret; 536 break; 537 case TOGGLING_MODE_DRP: 538 ret = fusb302_i2c_mask_write(chip, FUSB_REG_CONTROL2, 539 FUSB_REG_CONTROL2_MODE_MASK, 540 FUSB_REG_CONTROL2_MODE_DRP); 541 if (ret < 0) 542 return ret; 543 break; 544 default: 545 break; 546 } 547 548 if (mode == TOGGLING_MODE_OFF) { 549 /* mask TOGDONE interrupt */ 550 ret = fusb302_i2c_set_bits(chip, FUSB_REG_MASKA, 551 FUSB_REG_MASKA_TOGDONE); 552 if (ret < 0) 553 return ret; 554 chip->intr_togdone = false; 555 } else { 556 /* Datasheet says vconn MUST be off when toggling */ 557 WARN(chip->vconn_on, "Vconn is on during toggle start"); 558 /* unmask TOGDONE interrupt */ 559 ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASKA, 560 FUSB_REG_MASKA_TOGDONE); 561 if (ret < 0) 562 return ret; 563 chip->intr_togdone = true; 564 /* start toggling */ 565 ret = fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL2, 566 FUSB_REG_CONTROL2_TOGGLE); 567 if (ret < 0) 568 return ret; 569 /* during toggling, consider cc as Open */ 570 chip->cc1 = TYPEC_CC_OPEN; 571 chip->cc2 = TYPEC_CC_OPEN; 572 } 573 chip->toggling_mode = mode; 574 575 return ret; 576 } 577 578 static const char * const typec_cc_status_name[] = { 579 [TYPEC_CC_OPEN] = "Open", 580 [TYPEC_CC_RA] = "Ra", 581 [TYPEC_CC_RD] = "Rd", 582 [TYPEC_CC_RP_DEF] = "Rp-def", 583 [TYPEC_CC_RP_1_5] = "Rp-1.5", 584 [TYPEC_CC_RP_3_0] = "Rp-3.0", 585 }; 586 587 static const enum src_current_status cc_src_current[] = { 588 [TYPEC_CC_OPEN] = SRC_CURRENT_DEFAULT, 589 [TYPEC_CC_RA] = SRC_CURRENT_DEFAULT, 590 [TYPEC_CC_RD] = SRC_CURRENT_DEFAULT, 591 [TYPEC_CC_RP_DEF] = SRC_CURRENT_DEFAULT, 592 [TYPEC_CC_RP_1_5] = SRC_CURRENT_MEDIUM, 593 [TYPEC_CC_RP_3_0] = SRC_CURRENT_HIGH, 594 }; 595 596 static int tcpm_set_cc(struct tcpc_dev *dev, enum typec_cc_status cc) 597 { 598 struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, 599 tcpc_dev); 600 u8 switches0_mask = FUSB_REG_SWITCHES0_CC1_PU_EN | 601 FUSB_REG_SWITCHES0_CC2_PU_EN | 602 FUSB_REG_SWITCHES0_CC1_PD_EN | 603 FUSB_REG_SWITCHES0_CC2_PD_EN; 604 u8 rd_mda, switches0_data = 0x00; 605 int ret = 0; 606 607 mutex_lock(&chip->lock); 608 switch (cc) { 609 case TYPEC_CC_OPEN: 610 break; 611 case TYPEC_CC_RD: 612 switches0_data |= FUSB_REG_SWITCHES0_CC1_PD_EN | 613 FUSB_REG_SWITCHES0_CC2_PD_EN; 614 break; 615 case TYPEC_CC_RP_DEF: 616 case TYPEC_CC_RP_1_5: 617 case TYPEC_CC_RP_3_0: 618 switches0_data |= (chip->cc_polarity == TYPEC_POLARITY_CC1) ? 619 FUSB_REG_SWITCHES0_CC1_PU_EN : 620 FUSB_REG_SWITCHES0_CC2_PU_EN; 621 break; 622 default: 623 fusb302_log(chip, "unsupported cc value %s", 624 typec_cc_status_name[cc]); 625 ret = -EINVAL; 626 goto done; 627 } 628 629 fusb302_log(chip, "cc := %s", typec_cc_status_name[cc]); 630 631 ret = fusb302_set_toggling(chip, TOGGLING_MODE_OFF); 632 if (ret < 0) { 633 fusb302_log(chip, "cannot set toggling mode, ret=%d", ret); 634 goto done; 635 } 636 637 ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0, 638 switches0_mask, switches0_data); 639 if (ret < 0) { 640 fusb302_log(chip, "cannot set pull-up/-down, ret = %d", ret); 641 goto done; 642 } 643 /* reset the cc status */ 644 chip->cc1 = TYPEC_CC_OPEN; 645 chip->cc2 = TYPEC_CC_OPEN; 646 647 /* adjust current for SRC */ 648 ret = fusb302_set_src_current(chip, cc_src_current[cc]); 649 if (ret < 0) { 650 fusb302_log(chip, "cannot set src current %s, ret=%d", 651 typec_cc_status_name[cc], ret); 652 goto done; 653 } 654 655 /* enable/disable interrupts, BC_LVL for SNK and COMP_CHNG for SRC */ 656 switch (cc) { 657 case TYPEC_CC_RP_DEF: 658 case TYPEC_CC_RP_1_5: 659 case TYPEC_CC_RP_3_0: 660 rd_mda = rd_mda_value[cc_src_current[cc]]; 661 ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda); 662 if (ret < 0) { 663 fusb302_log(chip, 664 "cannot set SRC measure value, ret=%d", 665 ret); 666 goto done; 667 } 668 ret = fusb302_i2c_mask_write(chip, FUSB_REG_MASK, 669 FUSB_REG_MASK_BC_LVL | 670 FUSB_REG_MASK_COMP_CHNG, 671 FUSB_REG_MASK_COMP_CHNG); 672 if (ret < 0) { 673 fusb302_log(chip, "cannot set SRC interrupt, ret=%d", 674 ret); 675 goto done; 676 } 677 chip->intr_comp_chng = true; 678 break; 679 case TYPEC_CC_RD: 680 ret = fusb302_i2c_mask_write(chip, FUSB_REG_MASK, 681 FUSB_REG_MASK_BC_LVL | 682 FUSB_REG_MASK_COMP_CHNG, 683 FUSB_REG_MASK_BC_LVL); 684 if (ret < 0) { 685 fusb302_log(chip, "cannot set SRC interrupt, ret=%d", 686 ret); 687 goto done; 688 } 689 chip->intr_bc_lvl = true; 690 break; 691 default: 692 break; 693 } 694 done: 695 mutex_unlock(&chip->lock); 696 697 return ret; 698 } 699 700 static int tcpm_get_cc(struct tcpc_dev *dev, enum typec_cc_status *cc1, 701 enum typec_cc_status *cc2) 702 { 703 struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, 704 tcpc_dev); 705 706 mutex_lock(&chip->lock); 707 *cc1 = chip->cc1; 708 *cc2 = chip->cc2; 709 fusb302_log(chip, "cc1=%s, cc2=%s", typec_cc_status_name[*cc1], 710 typec_cc_status_name[*cc2]); 711 mutex_unlock(&chip->lock); 712 713 return 0; 714 } 715 716 static int tcpm_set_polarity(struct tcpc_dev *dev, 717 enum typec_cc_polarity polarity) 718 { 719 return 0; 720 } 721 722 static int tcpm_set_vconn(struct tcpc_dev *dev, bool on) 723 { 724 struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, 725 tcpc_dev); 726 int ret = 0; 727 u8 switches0_data = 0x00; 728 u8 switches0_mask = FUSB_REG_SWITCHES0_VCONN_CC1 | 729 FUSB_REG_SWITCHES0_VCONN_CC2; 730 731 mutex_lock(&chip->lock); 732 if (chip->vconn_on == on) { 733 fusb302_log(chip, "vconn is already %s", on ? "On" : "Off"); 734 goto done; 735 } 736 if (on) { 737 switches0_data = (chip->cc_polarity == TYPEC_POLARITY_CC1) ? 738 FUSB_REG_SWITCHES0_VCONN_CC2 : 739 FUSB_REG_SWITCHES0_VCONN_CC1; 740 } 741 ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES0, 742 switches0_mask, switches0_data); 743 if (ret < 0) 744 goto done; 745 chip->vconn_on = on; 746 fusb302_log(chip, "vconn := %s", on ? "On" : "Off"); 747 done: 748 mutex_unlock(&chip->lock); 749 750 return ret; 751 } 752 753 static int tcpm_set_vbus(struct tcpc_dev *dev, bool on, bool charge) 754 { 755 struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, 756 tcpc_dev); 757 int ret = 0; 758 759 mutex_lock(&chip->lock); 760 if (chip->vbus_on == on) { 761 fusb302_log(chip, "vbus is already %s", on ? "On" : "Off"); 762 } else { 763 if (on) 764 ret = regulator_enable(chip->vbus); 765 else 766 ret = regulator_disable(chip->vbus); 767 if (ret < 0) { 768 fusb302_log(chip, "cannot %s vbus regulator, ret=%d", 769 on ? "enable" : "disable", ret); 770 goto done; 771 } 772 chip->vbus_on = on; 773 fusb302_log(chip, "vbus := %s", on ? "On" : "Off"); 774 } 775 if (chip->charge_on == charge) 776 fusb302_log(chip, "charge is already %s", 777 charge ? "On" : "Off"); 778 else 779 chip->charge_on = charge; 780 781 done: 782 mutex_unlock(&chip->lock); 783 784 return ret; 785 } 786 787 static int fusb302_pd_tx_flush(struct fusb302_chip *chip) 788 { 789 return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL0, 790 FUSB_REG_CONTROL0_TX_FLUSH); 791 } 792 793 static int fusb302_pd_rx_flush(struct fusb302_chip *chip) 794 { 795 return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL1, 796 FUSB_REG_CONTROL1_RX_FLUSH); 797 } 798 799 static int fusb302_pd_set_auto_goodcrc(struct fusb302_chip *chip, bool on) 800 { 801 if (on) 802 return fusb302_i2c_set_bits(chip, FUSB_REG_SWITCHES1, 803 FUSB_REG_SWITCHES1_AUTO_GCRC); 804 return fusb302_i2c_clear_bits(chip, FUSB_REG_SWITCHES1, 805 FUSB_REG_SWITCHES1_AUTO_GCRC); 806 } 807 808 static int fusb302_pd_set_interrupts(struct fusb302_chip *chip, bool on) 809 { 810 int ret = 0; 811 u8 mask_interrupts = FUSB_REG_MASK_COLLISION; 812 u8 maska_interrupts = FUSB_REG_MASKA_RETRYFAIL | 813 FUSB_REG_MASKA_HARDSENT | 814 FUSB_REG_MASKA_TX_SUCCESS | 815 FUSB_REG_MASKA_HARDRESET; 816 u8 maskb_interrupts = FUSB_REG_MASKB_GCRCSENT; 817 818 ret = on ? 819 fusb302_i2c_clear_bits(chip, FUSB_REG_MASK, mask_interrupts) : 820 fusb302_i2c_set_bits(chip, FUSB_REG_MASK, mask_interrupts); 821 if (ret < 0) 822 return ret; 823 ret = on ? 824 fusb302_i2c_clear_bits(chip, FUSB_REG_MASKA, maska_interrupts) : 825 fusb302_i2c_set_bits(chip, FUSB_REG_MASKA, maska_interrupts); 826 if (ret < 0) 827 return ret; 828 ret = on ? 829 fusb302_i2c_clear_bits(chip, FUSB_REG_MASKB, maskb_interrupts) : 830 fusb302_i2c_set_bits(chip, FUSB_REG_MASKB, maskb_interrupts); 831 return ret; 832 } 833 834 static int tcpm_set_pd_rx(struct tcpc_dev *dev, bool on) 835 { 836 struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, 837 tcpc_dev); 838 int ret = 0; 839 840 mutex_lock(&chip->lock); 841 ret = fusb302_pd_rx_flush(chip); 842 if (ret < 0) { 843 fusb302_log(chip, "cannot flush pd rx buffer, ret=%d", ret); 844 goto done; 845 } 846 ret = fusb302_pd_tx_flush(chip); 847 if (ret < 0) { 848 fusb302_log(chip, "cannot flush pd tx buffer, ret=%d", ret); 849 goto done; 850 } 851 ret = fusb302_pd_set_auto_goodcrc(chip, on); 852 if (ret < 0) { 853 fusb302_log(chip, "cannot turn %s auto GCRC, ret=%d", 854 on ? "on" : "off", ret); 855 goto done; 856 } 857 ret = fusb302_pd_set_interrupts(chip, on); 858 if (ret < 0) { 859 fusb302_log(chip, "cannot turn %s pd interrupts, ret=%d", 860 on ? "on" : "off", ret); 861 goto done; 862 } 863 fusb302_log(chip, "pd := %s", on ? "on" : "off"); 864 done: 865 mutex_unlock(&chip->lock); 866 867 return ret; 868 } 869 870 static const char * const typec_role_name[] = { 871 [TYPEC_SINK] = "Sink", 872 [TYPEC_SOURCE] = "Source", 873 }; 874 875 static const char * const typec_data_role_name[] = { 876 [TYPEC_DEVICE] = "Device", 877 [TYPEC_HOST] = "Host", 878 }; 879 880 static int tcpm_set_roles(struct tcpc_dev *dev, bool attached, 881 enum typec_role pwr, enum typec_data_role data) 882 { 883 struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, 884 tcpc_dev); 885 int ret = 0; 886 u8 switches1_mask = FUSB_REG_SWITCHES1_POWERROLE | 887 FUSB_REG_SWITCHES1_DATAROLE; 888 u8 switches1_data = 0x00; 889 890 mutex_lock(&chip->lock); 891 if (pwr == TYPEC_SOURCE) 892 switches1_data |= FUSB_REG_SWITCHES1_POWERROLE; 893 if (data == TYPEC_HOST) 894 switches1_data |= FUSB_REG_SWITCHES1_DATAROLE; 895 ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES1, 896 switches1_mask, switches1_data); 897 if (ret < 0) { 898 fusb302_log(chip, "unable to set pd header %s, %s, ret=%d", 899 typec_role_name[pwr], typec_data_role_name[data], 900 ret); 901 goto done; 902 } 903 fusb302_log(chip, "pd header := %s, %s", typec_role_name[pwr], 904 typec_data_role_name[data]); 905 done: 906 mutex_unlock(&chip->lock); 907 908 return ret; 909 } 910 911 static int tcpm_start_toggling(struct tcpc_dev *dev, 912 enum typec_port_type port_type, 913 enum typec_cc_status cc) 914 { 915 struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, 916 tcpc_dev); 917 enum toggling_mode mode = TOGGLING_MODE_OFF; 918 int ret = 0; 919 920 switch (port_type) { 921 case TYPEC_PORT_SRC: 922 mode = TOGGLING_MODE_SRC; 923 break; 924 case TYPEC_PORT_SNK: 925 mode = TOGGLING_MODE_SNK; 926 break; 927 case TYPEC_PORT_DRP: 928 mode = TOGGLING_MODE_DRP; 929 break; 930 } 931 932 mutex_lock(&chip->lock); 933 ret = fusb302_set_src_current(chip, cc_src_current[cc]); 934 if (ret < 0) { 935 fusb302_log(chip, "unable to set src current %s, ret=%d", 936 typec_cc_status_name[cc], ret); 937 goto done; 938 } 939 ret = fusb302_set_toggling(chip, mode); 940 if (ret < 0) { 941 fusb302_log(chip, 942 "unable to start drp toggling, ret=%d", ret); 943 goto done; 944 } 945 fusb302_log(chip, "start drp toggling"); 946 done: 947 mutex_unlock(&chip->lock); 948 949 return ret; 950 } 951 952 static int fusb302_pd_send_message(struct fusb302_chip *chip, 953 const struct pd_message *msg) 954 { 955 int ret = 0; 956 u8 buf[40]; 957 u8 pos = 0; 958 int len; 959 960 /* SOP tokens */ 961 buf[pos++] = FUSB302_TKN_SYNC1; 962 buf[pos++] = FUSB302_TKN_SYNC1; 963 buf[pos++] = FUSB302_TKN_SYNC1; 964 buf[pos++] = FUSB302_TKN_SYNC2; 965 966 len = pd_header_cnt_le(msg->header) * 4; 967 /* plug 2 for header */ 968 len += 2; 969 if (len > 0x1F) { 970 fusb302_log(chip, 971 "PD message too long %d (incl. header)", len); 972 return -EINVAL; 973 } 974 /* packsym tells the FUSB302 chip that the next X bytes are payload */ 975 buf[pos++] = FUSB302_TKN_PACKSYM | (len & 0x1F); 976 memcpy(&buf[pos], &msg->header, sizeof(msg->header)); 977 pos += sizeof(msg->header); 978 979 len -= 2; 980 memcpy(&buf[pos], msg->payload, len); 981 pos += len; 982 983 /* CRC */ 984 buf[pos++] = FUSB302_TKN_JAMCRC; 985 /* EOP */ 986 buf[pos++] = FUSB302_TKN_EOP; 987 /* turn tx off after sending message */ 988 buf[pos++] = FUSB302_TKN_TXOFF; 989 /* start transmission */ 990 buf[pos++] = FUSB302_TKN_TXON; 991 992 ret = fusb302_i2c_block_write(chip, FUSB_REG_FIFOS, pos, buf); 993 if (ret < 0) 994 return ret; 995 fusb302_log(chip, "sending PD message header: %x", msg->header); 996 fusb302_log(chip, "sending PD message len: %d", len); 997 998 return ret; 999 } 1000 1001 static int fusb302_pd_send_hardreset(struct fusb302_chip *chip) 1002 { 1003 return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL3, 1004 FUSB_REG_CONTROL3_SEND_HARDRESET); 1005 } 1006 1007 static const char * const transmit_type_name[] = { 1008 [TCPC_TX_SOP] = "SOP", 1009 [TCPC_TX_SOP_PRIME] = "SOP'", 1010 [TCPC_TX_SOP_PRIME_PRIME] = "SOP''", 1011 [TCPC_TX_SOP_DEBUG_PRIME] = "DEBUG'", 1012 [TCPC_TX_SOP_DEBUG_PRIME_PRIME] = "DEBUG''", 1013 [TCPC_TX_HARD_RESET] = "HARD_RESET", 1014 [TCPC_TX_CABLE_RESET] = "CABLE_RESET", 1015 [TCPC_TX_BIST_MODE_2] = "BIST_MODE_2", 1016 }; 1017 1018 static int tcpm_pd_transmit(struct tcpc_dev *dev, enum tcpm_transmit_type type, 1019 const struct pd_message *msg) 1020 { 1021 struct fusb302_chip *chip = container_of(dev, struct fusb302_chip, 1022 tcpc_dev); 1023 int ret = 0; 1024 1025 mutex_lock(&chip->lock); 1026 switch (type) { 1027 case TCPC_TX_SOP: 1028 ret = fusb302_pd_send_message(chip, msg); 1029 if (ret < 0) 1030 fusb302_log(chip, 1031 "cannot send PD message, ret=%d", ret); 1032 break; 1033 case TCPC_TX_HARD_RESET: 1034 ret = fusb302_pd_send_hardreset(chip); 1035 if (ret < 0) 1036 fusb302_log(chip, 1037 "cannot send hardreset, ret=%d", ret); 1038 break; 1039 default: 1040 fusb302_log(chip, "type %s not supported", 1041 transmit_type_name[type]); 1042 ret = -EINVAL; 1043 } 1044 mutex_unlock(&chip->lock); 1045 1046 return ret; 1047 } 1048 1049 static enum typec_cc_status fusb302_bc_lvl_to_cc(u8 bc_lvl) 1050 { 1051 if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_1230_MAX) 1052 return TYPEC_CC_RP_3_0; 1053 if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_600_1230) 1054 return TYPEC_CC_RP_1_5; 1055 if (bc_lvl == FUSB_REG_STATUS0_BC_LVL_200_600) 1056 return TYPEC_CC_RP_DEF; 1057 return TYPEC_CC_OPEN; 1058 } 1059 1060 static void fusb302_bc_lvl_handler_work(struct work_struct *work) 1061 { 1062 struct fusb302_chip *chip = container_of(work, struct fusb302_chip, 1063 bc_lvl_handler.work); 1064 int ret = 0; 1065 u8 status0; 1066 u8 bc_lvl; 1067 enum typec_cc_status cc_status; 1068 1069 mutex_lock(&chip->lock); 1070 if (!chip->intr_bc_lvl) { 1071 fusb302_log(chip, "BC_LVL interrupt is turned off, abort"); 1072 goto done; 1073 } 1074 ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); 1075 if (ret < 0) 1076 goto done; 1077 fusb302_log(chip, "BC_LVL handler, status0=0x%02x", status0); 1078 if (status0 & FUSB_REG_STATUS0_ACTIVITY) { 1079 fusb302_log(chip, "CC activities detected, delay handling"); 1080 mod_delayed_work(chip->wq, &chip->bc_lvl_handler, 1081 msecs_to_jiffies(T_BC_LVL_DEBOUNCE_DELAY_MS)); 1082 goto done; 1083 } 1084 bc_lvl = status0 & FUSB_REG_STATUS0_BC_LVL_MASK; 1085 cc_status = fusb302_bc_lvl_to_cc(bc_lvl); 1086 if (chip->cc_polarity == TYPEC_POLARITY_CC1) { 1087 if (chip->cc1 != cc_status) { 1088 fusb302_log(chip, "cc1: %s -> %s", 1089 typec_cc_status_name[chip->cc1], 1090 typec_cc_status_name[cc_status]); 1091 chip->cc1 = cc_status; 1092 tcpm_cc_change(chip->tcpm_port); 1093 } 1094 } else { 1095 if (chip->cc2 != cc_status) { 1096 fusb302_log(chip, "cc2: %s -> %s", 1097 typec_cc_status_name[chip->cc2], 1098 typec_cc_status_name[cc_status]); 1099 chip->cc2 = cc_status; 1100 tcpm_cc_change(chip->tcpm_port); 1101 } 1102 } 1103 1104 done: 1105 mutex_unlock(&chip->lock); 1106 } 1107 1108 static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev) 1109 { 1110 fusb302_tcpc_dev->init = tcpm_init; 1111 fusb302_tcpc_dev->get_vbus = tcpm_get_vbus; 1112 fusb302_tcpc_dev->get_current_limit = tcpm_get_current_limit; 1113 fusb302_tcpc_dev->set_cc = tcpm_set_cc; 1114 fusb302_tcpc_dev->get_cc = tcpm_get_cc; 1115 fusb302_tcpc_dev->set_polarity = tcpm_set_polarity; 1116 fusb302_tcpc_dev->set_vconn = tcpm_set_vconn; 1117 fusb302_tcpc_dev->set_vbus = tcpm_set_vbus; 1118 fusb302_tcpc_dev->set_pd_rx = tcpm_set_pd_rx; 1119 fusb302_tcpc_dev->set_roles = tcpm_set_roles; 1120 fusb302_tcpc_dev->start_toggling = tcpm_start_toggling; 1121 fusb302_tcpc_dev->pd_transmit = tcpm_pd_transmit; 1122 } 1123 1124 static const char * const cc_polarity_name[] = { 1125 [TYPEC_POLARITY_CC1] = "Polarity_CC1", 1126 [TYPEC_POLARITY_CC2] = "Polarity_CC2", 1127 }; 1128 1129 static int fusb302_set_cc_polarity_and_pull(struct fusb302_chip *chip, 1130 enum typec_cc_polarity cc_polarity, 1131 bool pull_up, bool pull_down) 1132 { 1133 int ret = 0; 1134 u8 switches0_data = 0x00; 1135 u8 switches1_mask = FUSB_REG_SWITCHES1_TXCC1_EN | 1136 FUSB_REG_SWITCHES1_TXCC2_EN; 1137 u8 switches1_data = 0x00; 1138 1139 if (pull_down) 1140 switches0_data |= FUSB_REG_SWITCHES0_CC1_PD_EN | 1141 FUSB_REG_SWITCHES0_CC2_PD_EN; 1142 1143 if (cc_polarity == TYPEC_POLARITY_CC1) { 1144 switches0_data |= FUSB_REG_SWITCHES0_MEAS_CC1; 1145 if (chip->vconn_on) 1146 switches0_data |= FUSB_REG_SWITCHES0_VCONN_CC2; 1147 if (pull_up) 1148 switches0_data |= FUSB_REG_SWITCHES0_CC1_PU_EN; 1149 switches1_data = FUSB_REG_SWITCHES1_TXCC1_EN; 1150 } else { 1151 switches0_data |= FUSB_REG_SWITCHES0_MEAS_CC2; 1152 if (chip->vconn_on) 1153 switches0_data |= FUSB_REG_SWITCHES0_VCONN_CC1; 1154 if (pull_up) 1155 switches0_data |= FUSB_REG_SWITCHES0_CC2_PU_EN; 1156 switches1_data = FUSB_REG_SWITCHES1_TXCC2_EN; 1157 } 1158 ret = fusb302_i2c_write(chip, FUSB_REG_SWITCHES0, switches0_data); 1159 if (ret < 0) 1160 return ret; 1161 ret = fusb302_i2c_mask_write(chip, FUSB_REG_SWITCHES1, 1162 switches1_mask, switches1_data); 1163 if (ret < 0) 1164 return ret; 1165 chip->cc_polarity = cc_polarity; 1166 1167 return ret; 1168 } 1169 1170 static int fusb302_handle_togdone_snk(struct fusb302_chip *chip, 1171 u8 togdone_result) 1172 { 1173 int ret = 0; 1174 u8 status0; 1175 u8 bc_lvl; 1176 enum typec_cc_polarity cc_polarity; 1177 enum typec_cc_status cc_status_active, cc1, cc2; 1178 1179 /* set polarity and pull_up, pull_down */ 1180 cc_polarity = (togdone_result == FUSB_REG_STATUS1A_TOGSS_SNK1) ? 1181 TYPEC_POLARITY_CC1 : TYPEC_POLARITY_CC2; 1182 ret = fusb302_set_cc_polarity_and_pull(chip, cc_polarity, false, true); 1183 if (ret < 0) { 1184 fusb302_log(chip, "cannot set cc polarity %s, ret=%d", 1185 cc_polarity_name[cc_polarity], ret); 1186 return ret; 1187 } 1188 /* fusb302_set_cc_polarity() has set the correct measure block */ 1189 ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); 1190 if (ret < 0) 1191 return ret; 1192 bc_lvl = status0 & FUSB_REG_STATUS0_BC_LVL_MASK; 1193 cc_status_active = fusb302_bc_lvl_to_cc(bc_lvl); 1194 /* restart toggling if the cc status on the active line is OPEN */ 1195 if (cc_status_active == TYPEC_CC_OPEN) { 1196 fusb302_log(chip, "restart toggling as CC_OPEN detected"); 1197 ret = fusb302_set_toggling(chip, chip->toggling_mode); 1198 return ret; 1199 } 1200 /* update tcpm with the new cc value */ 1201 cc1 = (cc_polarity == TYPEC_POLARITY_CC1) ? 1202 cc_status_active : TYPEC_CC_OPEN; 1203 cc2 = (cc_polarity == TYPEC_POLARITY_CC2) ? 1204 cc_status_active : TYPEC_CC_OPEN; 1205 if ((chip->cc1 != cc1) || (chip->cc2 != cc2)) { 1206 chip->cc1 = cc1; 1207 chip->cc2 = cc2; 1208 tcpm_cc_change(chip->tcpm_port); 1209 } 1210 /* turn off toggling */ 1211 ret = fusb302_set_toggling(chip, TOGGLING_MODE_OFF); 1212 if (ret < 0) { 1213 fusb302_log(chip, 1214 "cannot set toggling mode off, ret=%d", ret); 1215 return ret; 1216 } 1217 /* unmask bc_lvl interrupt */ 1218 ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASK, FUSB_REG_MASK_BC_LVL); 1219 if (ret < 0) { 1220 fusb302_log(chip, 1221 "cannot unmask bc_lcl interrupt, ret=%d", ret); 1222 return ret; 1223 } 1224 chip->intr_bc_lvl = true; 1225 fusb302_log(chip, "detected cc1=%s, cc2=%s", 1226 typec_cc_status_name[cc1], 1227 typec_cc_status_name[cc2]); 1228 1229 return ret; 1230 } 1231 1232 /* On error returns < 0, otherwise a typec_cc_status value */ 1233 static int fusb302_get_src_cc_status(struct fusb302_chip *chip, 1234 enum typec_cc_polarity cc_polarity, 1235 enum typec_cc_status *cc) 1236 { 1237 u8 ra_mda = ra_mda_value[chip->src_current_status]; 1238 u8 rd_mda = rd_mda_value[chip->src_current_status]; 1239 u8 switches0_data, status0; 1240 int ret; 1241 1242 /* Step 1: Set switches so that we measure the right CC pin */ 1243 switches0_data = (cc_polarity == TYPEC_POLARITY_CC1) ? 1244 FUSB_REG_SWITCHES0_CC1_PU_EN | FUSB_REG_SWITCHES0_MEAS_CC1 : 1245 FUSB_REG_SWITCHES0_CC2_PU_EN | FUSB_REG_SWITCHES0_MEAS_CC2; 1246 ret = fusb302_i2c_write(chip, FUSB_REG_SWITCHES0, switches0_data); 1247 if (ret < 0) 1248 return ret; 1249 1250 fusb302_i2c_read(chip, FUSB_REG_SWITCHES0, &status0); 1251 fusb302_log(chip, "get_src_cc_status switches: 0x%0x", status0); 1252 1253 /* Step 2: Set compararator volt to differentiate between Open and Rd */ 1254 ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda); 1255 if (ret < 0) 1256 return ret; 1257 1258 usleep_range(50, 100); 1259 ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); 1260 if (ret < 0) 1261 return ret; 1262 1263 fusb302_log(chip, "get_src_cc_status rd_mda status0: 0x%0x", status0); 1264 if (status0 & FUSB_REG_STATUS0_COMP) { 1265 *cc = TYPEC_CC_OPEN; 1266 return 0; 1267 } 1268 1269 /* Step 3: Set compararator input to differentiate between Rd and Ra. */ 1270 ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, ra_mda); 1271 if (ret < 0) 1272 return ret; 1273 1274 usleep_range(50, 100); 1275 ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); 1276 if (ret < 0) 1277 return ret; 1278 1279 fusb302_log(chip, "get_src_cc_status ra_mda status0: 0x%0x", status0); 1280 if (status0 & FUSB_REG_STATUS0_COMP) 1281 *cc = TYPEC_CC_RD; 1282 else 1283 *cc = TYPEC_CC_RA; 1284 1285 return 0; 1286 } 1287 1288 static int fusb302_handle_togdone_src(struct fusb302_chip *chip, 1289 u8 togdone_result) 1290 { 1291 /* 1292 * - set polarity (measure cc, vconn, tx) 1293 * - set pull_up, pull_down 1294 * - set cc1, cc2, and update to tcpm_port 1295 * - set I_COMP interrupt on 1296 */ 1297 int ret = 0; 1298 u8 rd_mda = rd_mda_value[chip->src_current_status]; 1299 enum toggling_mode toggling_mode = chip->toggling_mode; 1300 enum typec_cc_polarity cc_polarity; 1301 enum typec_cc_status cc1, cc2; 1302 1303 /* 1304 * The toggle-engine will stop in a src state if it sees either Ra or 1305 * Rd. Determine the status for both CC pins, starting with the one 1306 * where toggling stopped, as that is where the switches point now. 1307 */ 1308 if (togdone_result == FUSB_REG_STATUS1A_TOGSS_SRC1) 1309 ret = fusb302_get_src_cc_status(chip, TYPEC_POLARITY_CC1, &cc1); 1310 else 1311 ret = fusb302_get_src_cc_status(chip, TYPEC_POLARITY_CC2, &cc2); 1312 if (ret < 0) 1313 return ret; 1314 /* we must turn off toggling before we can measure the other pin */ 1315 ret = fusb302_set_toggling(chip, TOGGLING_MODE_OFF); 1316 if (ret < 0) { 1317 fusb302_log(chip, "cannot set toggling mode off, ret=%d", ret); 1318 return ret; 1319 } 1320 /* get the status of the other pin */ 1321 if (togdone_result == FUSB_REG_STATUS1A_TOGSS_SRC1) 1322 ret = fusb302_get_src_cc_status(chip, TYPEC_POLARITY_CC2, &cc2); 1323 else 1324 ret = fusb302_get_src_cc_status(chip, TYPEC_POLARITY_CC1, &cc1); 1325 if (ret < 0) 1326 return ret; 1327 1328 /* determine polarity based on the status of both pins */ 1329 if (cc1 == TYPEC_CC_RD && 1330 (cc2 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_RA)) { 1331 cc_polarity = TYPEC_POLARITY_CC1; 1332 } else if (cc2 == TYPEC_CC_RD && 1333 (cc1 == TYPEC_CC_OPEN || cc1 == TYPEC_CC_RA)) { 1334 cc_polarity = TYPEC_POLARITY_CC2; 1335 } else { 1336 fusb302_log(chip, "unexpected CC status cc1=%s, cc2=%s, restarting toggling", 1337 typec_cc_status_name[cc1], 1338 typec_cc_status_name[cc2]); 1339 return fusb302_set_toggling(chip, toggling_mode); 1340 } 1341 /* set polarity and pull_up, pull_down */ 1342 ret = fusb302_set_cc_polarity_and_pull(chip, cc_polarity, true, false); 1343 if (ret < 0) { 1344 fusb302_log(chip, "cannot set cc polarity %s, ret=%d", 1345 cc_polarity_name[cc_polarity], ret); 1346 return ret; 1347 } 1348 /* update tcpm with the new cc value */ 1349 if ((chip->cc1 != cc1) || (chip->cc2 != cc2)) { 1350 chip->cc1 = cc1; 1351 chip->cc2 = cc2; 1352 tcpm_cc_change(chip->tcpm_port); 1353 } 1354 /* set MDAC to Rd threshold, and unmask I_COMP for unplug detection */ 1355 ret = fusb302_i2c_write(chip, FUSB_REG_MEASURE, rd_mda); 1356 if (ret < 0) 1357 return ret; 1358 /* unmask comp_chng interrupt */ 1359 ret = fusb302_i2c_clear_bits(chip, FUSB_REG_MASK, 1360 FUSB_REG_MASK_COMP_CHNG); 1361 if (ret < 0) { 1362 fusb302_log(chip, 1363 "cannot unmask comp_chng interrupt, ret=%d", ret); 1364 return ret; 1365 } 1366 chip->intr_comp_chng = true; 1367 fusb302_log(chip, "detected cc1=%s, cc2=%s", 1368 typec_cc_status_name[cc1], 1369 typec_cc_status_name[cc2]); 1370 1371 return ret; 1372 } 1373 1374 static int fusb302_handle_togdone(struct fusb302_chip *chip) 1375 { 1376 int ret = 0; 1377 u8 status1a; 1378 u8 togdone_result; 1379 1380 ret = fusb302_i2c_read(chip, FUSB_REG_STATUS1A, &status1a); 1381 if (ret < 0) 1382 return ret; 1383 togdone_result = (status1a >> FUSB_REG_STATUS1A_TOGSS_POS) & 1384 FUSB_REG_STATUS1A_TOGSS_MASK; 1385 switch (togdone_result) { 1386 case FUSB_REG_STATUS1A_TOGSS_SNK1: 1387 case FUSB_REG_STATUS1A_TOGSS_SNK2: 1388 return fusb302_handle_togdone_snk(chip, togdone_result); 1389 case FUSB_REG_STATUS1A_TOGSS_SRC1: 1390 case FUSB_REG_STATUS1A_TOGSS_SRC2: 1391 return fusb302_handle_togdone_src(chip, togdone_result); 1392 case FUSB_REG_STATUS1A_TOGSS_AA: 1393 /* doesn't support */ 1394 fusb302_log(chip, "AudioAccessory not supported"); 1395 fusb302_set_toggling(chip, chip->toggling_mode); 1396 break; 1397 default: 1398 fusb302_log(chip, "TOGDONE with an invalid state: %d", 1399 togdone_result); 1400 fusb302_set_toggling(chip, chip->toggling_mode); 1401 break; 1402 } 1403 return ret; 1404 } 1405 1406 static int fusb302_pd_reset(struct fusb302_chip *chip) 1407 { 1408 return fusb302_i2c_set_bits(chip, FUSB_REG_RESET, 1409 FUSB_REG_RESET_PD_RESET); 1410 } 1411 1412 static int fusb302_pd_read_message(struct fusb302_chip *chip, 1413 struct pd_message *msg) 1414 { 1415 int ret = 0; 1416 u8 token; 1417 u8 crc[4]; 1418 int len; 1419 1420 /* first SOP token */ 1421 ret = fusb302_i2c_read(chip, FUSB_REG_FIFOS, &token); 1422 if (ret < 0) 1423 return ret; 1424 ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, 2, 1425 (u8 *)&msg->header); 1426 if (ret < 0) 1427 return ret; 1428 len = pd_header_cnt_le(msg->header) * 4; 1429 /* add 4 to length to include the CRC */ 1430 if (len > PD_MAX_PAYLOAD * 4) { 1431 fusb302_log(chip, "PD message too long %d", len); 1432 return -EINVAL; 1433 } 1434 if (len > 0) { 1435 ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, len, 1436 (u8 *)msg->payload); 1437 if (ret < 0) 1438 return ret; 1439 } 1440 /* another 4 bytes to read CRC out */ 1441 ret = fusb302_i2c_block_read(chip, FUSB_REG_FIFOS, 4, crc); 1442 if (ret < 0) 1443 return ret; 1444 fusb302_log(chip, "PD message header: %x", msg->header); 1445 fusb302_log(chip, "PD message len: %d", len); 1446 1447 /* 1448 * Check if we've read off a GoodCRC message. If so then indicate to 1449 * TCPM that the previous transmission has completed. Otherwise we pass 1450 * the received message over to TCPM for processing. 1451 * 1452 * We make this check here instead of basing the reporting decision on 1453 * the IRQ event type, as it's possible for the chip to report the 1454 * TX_SUCCESS and GCRCSENT events out of order on occasion, so we need 1455 * to check the message type to ensure correct reporting to TCPM. 1456 */ 1457 if ((!len) && (pd_header_type_le(msg->header) == PD_CTRL_GOOD_CRC)) 1458 tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_SUCCESS); 1459 else 1460 tcpm_pd_receive(chip->tcpm_port, msg); 1461 1462 return ret; 1463 } 1464 1465 static irqreturn_t fusb302_irq_intn(int irq, void *dev_id) 1466 { 1467 struct fusb302_chip *chip = dev_id; 1468 unsigned long flags; 1469 1470 /* Disable our level triggered IRQ until our irq_work has cleared it */ 1471 disable_irq_nosync(chip->gpio_int_n_irq); 1472 1473 spin_lock_irqsave(&chip->irq_lock, flags); 1474 if (chip->irq_suspended) 1475 chip->irq_while_suspended = true; 1476 else 1477 schedule_work(&chip->irq_work); 1478 spin_unlock_irqrestore(&chip->irq_lock, flags); 1479 1480 return IRQ_HANDLED; 1481 } 1482 1483 static void fusb302_irq_work(struct work_struct *work) 1484 { 1485 struct fusb302_chip *chip = container_of(work, struct fusb302_chip, 1486 irq_work); 1487 int ret = 0; 1488 u8 interrupt; 1489 u8 interrupta; 1490 u8 interruptb; 1491 u8 status0; 1492 bool vbus_present; 1493 bool comp_result; 1494 bool intr_togdone; 1495 bool intr_bc_lvl; 1496 bool intr_comp_chng; 1497 struct pd_message pd_msg; 1498 1499 mutex_lock(&chip->lock); 1500 /* grab a snapshot of intr flags */ 1501 intr_togdone = chip->intr_togdone; 1502 intr_bc_lvl = chip->intr_bc_lvl; 1503 intr_comp_chng = chip->intr_comp_chng; 1504 1505 ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPT, &interrupt); 1506 if (ret < 0) 1507 goto done; 1508 ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPTA, &interrupta); 1509 if (ret < 0) 1510 goto done; 1511 ret = fusb302_i2c_read(chip, FUSB_REG_INTERRUPTB, &interruptb); 1512 if (ret < 0) 1513 goto done; 1514 ret = fusb302_i2c_read(chip, FUSB_REG_STATUS0, &status0); 1515 if (ret < 0) 1516 goto done; 1517 fusb302_log(chip, 1518 "IRQ: 0x%02x, a: 0x%02x, b: 0x%02x, status0: 0x%02x", 1519 interrupt, interrupta, interruptb, status0); 1520 1521 if (interrupt & FUSB_REG_INTERRUPT_VBUSOK) { 1522 vbus_present = !!(status0 & FUSB_REG_STATUS0_VBUSOK); 1523 fusb302_log(chip, "IRQ: VBUS_OK, vbus=%s", 1524 vbus_present ? "On" : "Off"); 1525 if (vbus_present != chip->vbus_present) { 1526 chip->vbus_present = vbus_present; 1527 tcpm_vbus_change(chip->tcpm_port); 1528 } 1529 } 1530 1531 if ((interrupta & FUSB_REG_INTERRUPTA_TOGDONE) && intr_togdone) { 1532 fusb302_log(chip, "IRQ: TOGDONE"); 1533 ret = fusb302_handle_togdone(chip); 1534 if (ret < 0) { 1535 fusb302_log(chip, 1536 "handle togdone error, ret=%d", ret); 1537 goto done; 1538 } 1539 } 1540 1541 if ((interrupt & FUSB_REG_INTERRUPT_BC_LVL) && intr_bc_lvl) { 1542 fusb302_log(chip, "IRQ: BC_LVL, handler pending"); 1543 /* 1544 * as BC_LVL interrupt can be affected by PD activity, 1545 * apply delay to for the handler to wait for the PD 1546 * signaling to finish. 1547 */ 1548 mod_delayed_work(chip->wq, &chip->bc_lvl_handler, 1549 msecs_to_jiffies(T_BC_LVL_DEBOUNCE_DELAY_MS)); 1550 } 1551 1552 if ((interrupt & FUSB_REG_INTERRUPT_COMP_CHNG) && intr_comp_chng) { 1553 comp_result = !!(status0 & FUSB_REG_STATUS0_COMP); 1554 fusb302_log(chip, "IRQ: COMP_CHNG, comp=%s", 1555 comp_result ? "true" : "false"); 1556 if (comp_result) { 1557 /* cc level > Rd_threshold, detach */ 1558 chip->cc1 = TYPEC_CC_OPEN; 1559 chip->cc2 = TYPEC_CC_OPEN; 1560 tcpm_cc_change(chip->tcpm_port); 1561 } 1562 } 1563 1564 if (interrupt & FUSB_REG_INTERRUPT_COLLISION) { 1565 fusb302_log(chip, "IRQ: PD collision"); 1566 tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_FAILED); 1567 } 1568 1569 if (interrupta & FUSB_REG_INTERRUPTA_RETRYFAIL) { 1570 fusb302_log(chip, "IRQ: PD retry failed"); 1571 tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_FAILED); 1572 } 1573 1574 if (interrupta & FUSB_REG_INTERRUPTA_HARDSENT) { 1575 fusb302_log(chip, "IRQ: PD hardreset sent"); 1576 ret = fusb302_pd_reset(chip); 1577 if (ret < 0) { 1578 fusb302_log(chip, "cannot PD reset, ret=%d", ret); 1579 goto done; 1580 } 1581 tcpm_pd_transmit_complete(chip->tcpm_port, TCPC_TX_SUCCESS); 1582 } 1583 1584 if (interrupta & FUSB_REG_INTERRUPTA_TX_SUCCESS) { 1585 fusb302_log(chip, "IRQ: PD tx success"); 1586 ret = fusb302_pd_read_message(chip, &pd_msg); 1587 if (ret < 0) { 1588 fusb302_log(chip, 1589 "cannot read in PD message, ret=%d", ret); 1590 goto done; 1591 } 1592 } 1593 1594 if (interrupta & FUSB_REG_INTERRUPTA_HARDRESET) { 1595 fusb302_log(chip, "IRQ: PD received hardreset"); 1596 ret = fusb302_pd_reset(chip); 1597 if (ret < 0) { 1598 fusb302_log(chip, "cannot PD reset, ret=%d", ret); 1599 goto done; 1600 } 1601 tcpm_pd_hard_reset(chip->tcpm_port); 1602 } 1603 1604 if (interruptb & FUSB_REG_INTERRUPTB_GCRCSENT) { 1605 fusb302_log(chip, "IRQ: PD sent good CRC"); 1606 ret = fusb302_pd_read_message(chip, &pd_msg); 1607 if (ret < 0) { 1608 fusb302_log(chip, 1609 "cannot read in PD message, ret=%d", ret); 1610 goto done; 1611 } 1612 } 1613 done: 1614 mutex_unlock(&chip->lock); 1615 enable_irq(chip->gpio_int_n_irq); 1616 } 1617 1618 static int init_gpio(struct fusb302_chip *chip) 1619 { 1620 struct device *dev = chip->dev; 1621 int ret = 0; 1622 1623 chip->gpio_int_n = devm_gpiod_get(dev, "fcs,int_n", GPIOD_IN); 1624 if (IS_ERR(chip->gpio_int_n)) { 1625 dev_err(dev, "failed to request gpio_int_n\n"); 1626 return PTR_ERR(chip->gpio_int_n); 1627 } 1628 ret = gpiod_to_irq(chip->gpio_int_n); 1629 if (ret < 0) { 1630 dev_err(dev, 1631 "cannot request IRQ for GPIO Int_N, ret=%d", ret); 1632 return ret; 1633 } 1634 chip->gpio_int_n_irq = ret; 1635 return 0; 1636 } 1637 1638 #define PDO_FIXED_FLAGS \ 1639 (PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP | PDO_FIXED_USB_COMM) 1640 1641 static const u32 src_pdo[] = { 1642 PDO_FIXED(5000, 400, PDO_FIXED_FLAGS) 1643 }; 1644 1645 static const u32 snk_pdo[] = { 1646 PDO_FIXED(5000, 400, PDO_FIXED_FLAGS) 1647 }; 1648 1649 static const struct property_entry port_props[] = { 1650 PROPERTY_ENTRY_STRING("data-role", "dual"), 1651 PROPERTY_ENTRY_STRING("power-role", "dual"), 1652 PROPERTY_ENTRY_STRING("try-power-role", "sink"), 1653 PROPERTY_ENTRY_U32_ARRAY("source-pdos", src_pdo), 1654 PROPERTY_ENTRY_U32_ARRAY("sink-pdos", snk_pdo), 1655 PROPERTY_ENTRY_U32("op-sink-microwatt", 2500000), 1656 { } 1657 }; 1658 1659 static struct fwnode_handle *fusb302_fwnode_get(struct device *dev) 1660 { 1661 struct fwnode_handle *fwnode; 1662 1663 fwnode = device_get_named_child_node(dev, "connector"); 1664 if (!fwnode) 1665 fwnode = fwnode_create_software_node(port_props, NULL); 1666 1667 return fwnode; 1668 } 1669 1670 static int fusb302_probe(struct i2c_client *client, 1671 const struct i2c_device_id *id) 1672 { 1673 struct fusb302_chip *chip; 1674 struct i2c_adapter *adapter = client->adapter; 1675 struct device *dev = &client->dev; 1676 const char *name; 1677 int ret = 0; 1678 1679 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) { 1680 dev_err(&client->dev, 1681 "I2C/SMBus block functionality not supported!\n"); 1682 return -ENODEV; 1683 } 1684 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); 1685 if (!chip) 1686 return -ENOMEM; 1687 1688 chip->i2c_client = client; 1689 chip->dev = &client->dev; 1690 mutex_init(&chip->lock); 1691 1692 /* 1693 * Devicetree platforms should get extcon via phandle (not yet 1694 * supported). On ACPI platforms, we get the name from a device prop. 1695 * This device prop is for kernel internal use only and is expected 1696 * to be set by the platform code which also registers the i2c client 1697 * for the fusb302. 1698 */ 1699 if (device_property_read_string(dev, "linux,extcon-name", &name) == 0) { 1700 chip->extcon = extcon_get_extcon_dev(name); 1701 if (!chip->extcon) 1702 return -EPROBE_DEFER; 1703 } 1704 1705 chip->vbus = devm_regulator_get(chip->dev, "vbus"); 1706 if (IS_ERR(chip->vbus)) 1707 return PTR_ERR(chip->vbus); 1708 1709 chip->wq = create_singlethread_workqueue(dev_name(chip->dev)); 1710 if (!chip->wq) 1711 return -ENOMEM; 1712 1713 spin_lock_init(&chip->irq_lock); 1714 INIT_WORK(&chip->irq_work, fusb302_irq_work); 1715 INIT_DELAYED_WORK(&chip->bc_lvl_handler, fusb302_bc_lvl_handler_work); 1716 init_tcpc_dev(&chip->tcpc_dev); 1717 fusb302_debugfs_init(chip); 1718 1719 if (client->irq) { 1720 chip->gpio_int_n_irq = client->irq; 1721 } else { 1722 ret = init_gpio(chip); 1723 if (ret < 0) 1724 goto destroy_workqueue; 1725 } 1726 1727 chip->tcpc_dev.fwnode = fusb302_fwnode_get(dev); 1728 if (IS_ERR(chip->tcpc_dev.fwnode)) { 1729 ret = PTR_ERR(chip->tcpc_dev.fwnode); 1730 goto destroy_workqueue; 1731 } 1732 1733 chip->tcpm_port = tcpm_register_port(&client->dev, &chip->tcpc_dev); 1734 if (IS_ERR(chip->tcpm_port)) { 1735 fwnode_handle_put(chip->tcpc_dev.fwnode); 1736 ret = PTR_ERR(chip->tcpm_port); 1737 if (ret != -EPROBE_DEFER) 1738 dev_err(dev, "cannot register tcpm port, ret=%d", ret); 1739 goto destroy_workqueue; 1740 } 1741 1742 ret = request_irq(chip->gpio_int_n_irq, fusb302_irq_intn, 1743 IRQF_ONESHOT | IRQF_TRIGGER_LOW, 1744 "fsc_interrupt_int_n", chip); 1745 if (ret < 0) { 1746 dev_err(dev, "cannot request IRQ for GPIO Int_N, ret=%d", ret); 1747 goto tcpm_unregister_port; 1748 } 1749 enable_irq_wake(chip->gpio_int_n_irq); 1750 i2c_set_clientdata(client, chip); 1751 1752 return ret; 1753 1754 tcpm_unregister_port: 1755 tcpm_unregister_port(chip->tcpm_port); 1756 fwnode_handle_put(chip->tcpc_dev.fwnode); 1757 destroy_workqueue: 1758 fusb302_debugfs_exit(chip); 1759 destroy_workqueue(chip->wq); 1760 1761 return ret; 1762 } 1763 1764 static int fusb302_remove(struct i2c_client *client) 1765 { 1766 struct fusb302_chip *chip = i2c_get_clientdata(client); 1767 1768 disable_irq_wake(chip->gpio_int_n_irq); 1769 free_irq(chip->gpio_int_n_irq, chip); 1770 cancel_work_sync(&chip->irq_work); 1771 cancel_delayed_work_sync(&chip->bc_lvl_handler); 1772 tcpm_unregister_port(chip->tcpm_port); 1773 fwnode_handle_put(chip->tcpc_dev.fwnode); 1774 destroy_workqueue(chip->wq); 1775 fusb302_debugfs_exit(chip); 1776 1777 return 0; 1778 } 1779 1780 static int fusb302_pm_suspend(struct device *dev) 1781 { 1782 struct fusb302_chip *chip = dev->driver_data; 1783 unsigned long flags; 1784 1785 spin_lock_irqsave(&chip->irq_lock, flags); 1786 chip->irq_suspended = true; 1787 spin_unlock_irqrestore(&chip->irq_lock, flags); 1788 1789 /* Make sure any pending irq_work is finished before the bus suspends */ 1790 flush_work(&chip->irq_work); 1791 return 0; 1792 } 1793 1794 static int fusb302_pm_resume(struct device *dev) 1795 { 1796 struct fusb302_chip *chip = dev->driver_data; 1797 unsigned long flags; 1798 1799 spin_lock_irqsave(&chip->irq_lock, flags); 1800 if (chip->irq_while_suspended) { 1801 schedule_work(&chip->irq_work); 1802 chip->irq_while_suspended = false; 1803 } 1804 chip->irq_suspended = false; 1805 spin_unlock_irqrestore(&chip->irq_lock, flags); 1806 1807 return 0; 1808 } 1809 1810 static const struct of_device_id fusb302_dt_match[] = { 1811 {.compatible = "fcs,fusb302"}, 1812 {}, 1813 }; 1814 MODULE_DEVICE_TABLE(of, fusb302_dt_match); 1815 1816 static const struct i2c_device_id fusb302_i2c_device_id[] = { 1817 {"typec_fusb302", 0}, 1818 {}, 1819 }; 1820 MODULE_DEVICE_TABLE(i2c, fusb302_i2c_device_id); 1821 1822 static const struct dev_pm_ops fusb302_pm_ops = { 1823 .suspend = fusb302_pm_suspend, 1824 .resume = fusb302_pm_resume, 1825 }; 1826 1827 static struct i2c_driver fusb302_driver = { 1828 .driver = { 1829 .name = "typec_fusb302", 1830 .pm = &fusb302_pm_ops, 1831 .of_match_table = of_match_ptr(fusb302_dt_match), 1832 }, 1833 .probe = fusb302_probe, 1834 .remove = fusb302_remove, 1835 .id_table = fusb302_i2c_device_id, 1836 }; 1837 module_i2c_driver(fusb302_driver); 1838 1839 MODULE_AUTHOR("Yueyao Zhu <yueyao.zhu@gmail.com>"); 1840 MODULE_DESCRIPTION("Fairchild FUSB302 Type-C Chip Driver"); 1841 MODULE_LICENSE("GPL"); 1842