1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Copyright (c) 2011-2016 Synaptics Incorporated 4 * Copyright (c) 2011 Unixphere 5 */ 6 7#include <linux/kernel.h> 8#include <linux/rmi.h> 9#include <linux/slab.h> 10#include <linux/uaccess.h> 11#include <linux/of.h> 12#include <asm/unaligned.h> 13#include "rmi_driver.h" 14 15#define RMI_PRODUCT_ID_LENGTH 10 16#define RMI_PRODUCT_INFO_LENGTH 2 17 18#define RMI_DATE_CODE_LENGTH 3 19 20#define PRODUCT_ID_OFFSET 0x10 21#define PRODUCT_INFO_OFFSET 0x1E 22 23 24/* Force a firmware reset of the sensor */ 25#define RMI_F01_CMD_DEVICE_RESET 1 26 27/* Various F01_RMI_QueryX bits */ 28 29#define RMI_F01_QRY1_CUSTOM_MAP BIT(0) 30#define RMI_F01_QRY1_NON_COMPLIANT BIT(1) 31#define RMI_F01_QRY1_HAS_LTS BIT(2) 32#define RMI_F01_QRY1_HAS_SENSOR_ID BIT(3) 33#define RMI_F01_QRY1_HAS_CHARGER_INP BIT(4) 34#define RMI_F01_QRY1_HAS_ADJ_DOZE BIT(5) 35#define RMI_F01_QRY1_HAS_ADJ_DOZE_HOFF BIT(6) 36#define RMI_F01_QRY1_HAS_QUERY42 BIT(7) 37 38#define RMI_F01_QRY5_YEAR_MASK 0x1f 39#define RMI_F01_QRY6_MONTH_MASK 0x0f 40#define RMI_F01_QRY7_DAY_MASK 0x1f 41 42#define RMI_F01_QRY2_PRODINFO_MASK 0x7f 43 44#define RMI_F01_BASIC_QUERY_LEN 21 /* From Query 00 through 20 */ 45 46struct f01_basic_properties { 47 u8 manufacturer_id; 48 bool has_lts; 49 bool has_adjustable_doze; 50 bool has_adjustable_doze_holdoff; 51 char dom[11]; /* YYYY/MM/DD + '\0' */ 52 u8 product_id[RMI_PRODUCT_ID_LENGTH + 1]; 53 u16 productinfo; 54 u32 firmware_id; 55 u32 package_id; 56}; 57 58/* F01 device status bits */ 59 60/* Most recent device status event */ 61#define RMI_F01_STATUS_CODE(status) ((status) & 0x0f) 62/* The device has lost its configuration for some reason. */ 63#define RMI_F01_STATUS_UNCONFIGURED(status) (!!((status) & 0x80)) 64/* The device is in bootloader mode */ 65#define RMI_F01_STATUS_BOOTLOADER(status) ((status) & 0x40) 66 67/* Control register bits */ 68 69/* 70 * Sleep mode controls power management on the device and affects all 71 * functions of the device. 72 */ 73#define RMI_F01_CTRL0_SLEEP_MODE_MASK 0x03 74 75#define RMI_SLEEP_MODE_NORMAL 0x00 76#define RMI_SLEEP_MODE_SENSOR_SLEEP 0x01 77#define RMI_SLEEP_MODE_RESERVED0 0x02 78#define RMI_SLEEP_MODE_RESERVED1 0x03 79 80/* 81 * This bit disables whatever sleep mode may be selected by the sleep_mode 82 * field and forces the device to run at full power without sleeping. 83 */ 84#define RMI_F01_CTRL0_NOSLEEP_BIT BIT(2) 85 86/* 87 * When this bit is set, the touch controller employs a noise-filtering 88 * algorithm designed for use with a connected battery charger. 89 */ 90#define RMI_F01_CTRL0_CHARGER_BIT BIT(5) 91 92/* 93 * Sets the report rate for the device. The effect of this setting is 94 * highly product dependent. Check the spec sheet for your particular 95 * touch sensor. 96 */ 97#define RMI_F01_CTRL0_REPORTRATE_BIT BIT(6) 98 99/* 100 * Written by the host as an indicator that the device has been 101 * successfully configured. 102 */ 103#define RMI_F01_CTRL0_CONFIGURED_BIT BIT(7) 104 105/** 106 * @ctrl0 - see the bit definitions above. 107 * @doze_interval - controls the interval between checks for finger presence 108 * when the touch sensor is in doze mode, in units of 10ms. 109 * @wakeup_threshold - controls the capacitance threshold at which the touch 110 * sensor will decide to wake up from that low power state. 111 * @doze_holdoff - controls how long the touch sensor waits after the last 112 * finger lifts before entering the doze state, in units of 100ms. 113 */ 114struct f01_device_control { 115 u8 ctrl0; 116 u8 doze_interval; 117 u8 wakeup_threshold; 118 u8 doze_holdoff; 119}; 120 121struct f01_data { 122 struct f01_basic_properties properties; 123 struct f01_device_control device_control; 124 125 u16 doze_interval_addr; 126 u16 wakeup_threshold_addr; 127 u16 doze_holdoff_addr; 128 129 bool suspended; 130 bool old_nosleep; 131 132 unsigned int num_of_irq_regs; 133}; 134 135static int rmi_f01_read_properties(struct rmi_device *rmi_dev, 136 u16 query_base_addr, 137 struct f01_basic_properties *props) 138{ 139 u8 queries[RMI_F01_BASIC_QUERY_LEN]; 140 int ret; 141 int query_offset = query_base_addr; 142 bool has_ds4_queries = false; 143 bool has_query42 = false; 144 bool has_sensor_id = false; 145 bool has_package_id_query = false; 146 bool has_build_id_query = false; 147 u16 prod_info_addr; 148 u8 ds4_query_len; 149 150 ret = rmi_read_block(rmi_dev, query_offset, 151 queries, RMI_F01_BASIC_QUERY_LEN); 152 if (ret) { 153 dev_err(&rmi_dev->dev, 154 "Failed to read device query registers: %d\n", ret); 155 return ret; 156 } 157 158 prod_info_addr = query_offset + 17; 159 query_offset += RMI_F01_BASIC_QUERY_LEN; 160 161 /* Now parse what we got */ 162 props->manufacturer_id = queries[0]; 163 164 props->has_lts = queries[1] & RMI_F01_QRY1_HAS_LTS; 165 props->has_adjustable_doze = 166 queries[1] & RMI_F01_QRY1_HAS_ADJ_DOZE; 167 props->has_adjustable_doze_holdoff = 168 queries[1] & RMI_F01_QRY1_HAS_ADJ_DOZE_HOFF; 169 has_query42 = queries[1] & RMI_F01_QRY1_HAS_QUERY42; 170 has_sensor_id = queries[1] & RMI_F01_QRY1_HAS_SENSOR_ID; 171 172 snprintf(props->dom, sizeof(props->dom), "20%02d/%02d/%02d", 173 queries[5] & RMI_F01_QRY5_YEAR_MASK, 174 queries[6] & RMI_F01_QRY6_MONTH_MASK, 175 queries[7] & RMI_F01_QRY7_DAY_MASK); 176 177 memcpy(props->product_id, &queries[11], 178 RMI_PRODUCT_ID_LENGTH); 179 props->product_id[RMI_PRODUCT_ID_LENGTH] = '\0'; 180 181 props->productinfo = 182 ((queries[2] & RMI_F01_QRY2_PRODINFO_MASK) << 7) | 183 (queries[3] & RMI_F01_QRY2_PRODINFO_MASK); 184 185 if (has_sensor_id) 186 query_offset++; 187 188 if (has_query42) { 189 ret = rmi_read(rmi_dev, query_offset, queries); 190 if (ret) { 191 dev_err(&rmi_dev->dev, 192 "Failed to read query 42 register: %d\n", ret); 193 return ret; 194 } 195 196 has_ds4_queries = !!(queries[0] & BIT(0)); 197 query_offset++; 198 } 199 200 if (has_ds4_queries) { 201 ret = rmi_read(rmi_dev, query_offset, &ds4_query_len); 202 if (ret) { 203 dev_err(&rmi_dev->dev, 204 "Failed to read DS4 queries length: %d\n", ret); 205 return ret; 206 } 207 query_offset++; 208 209 if (ds4_query_len > 0) { 210 ret = rmi_read(rmi_dev, query_offset, queries); 211 if (ret) { 212 dev_err(&rmi_dev->dev, 213 "Failed to read DS4 queries: %d\n", 214 ret); 215 return ret; 216 } 217 218 has_package_id_query = !!(queries[0] & BIT(0)); 219 has_build_id_query = !!(queries[0] & BIT(1)); 220 } 221 222 if (has_package_id_query) { 223 ret = rmi_read_block(rmi_dev, prod_info_addr, 224 queries, sizeof(__le64)); 225 if (ret) { 226 dev_err(&rmi_dev->dev, 227 "Failed to read package info: %d\n", 228 ret); 229 return ret; 230 } 231 232 props->package_id = get_unaligned_le64(queries); 233 prod_info_addr++; 234 } 235 236 if (has_build_id_query) { 237 ret = rmi_read_block(rmi_dev, prod_info_addr, queries, 238 3); 239 if (ret) { 240 dev_err(&rmi_dev->dev, 241 "Failed to read product info: %d\n", 242 ret); 243 return ret; 244 } 245 246 props->firmware_id = queries[1] << 8 | queries[0]; 247 props->firmware_id += queries[2] * 65536; 248 } 249 } 250 251 return 0; 252} 253 254const char *rmi_f01_get_product_ID(struct rmi_function *fn) 255{ 256 struct f01_data *f01 = dev_get_drvdata(&fn->dev); 257 258 return f01->properties.product_id; 259} 260 261static ssize_t rmi_driver_manufacturer_id_show(struct device *dev, 262 struct device_attribute *dattr, 263 char *buf) 264{ 265 struct rmi_driver_data *data = dev_get_drvdata(dev); 266 struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev); 267 268 return scnprintf(buf, PAGE_SIZE, "%d\n", 269 f01->properties.manufacturer_id); 270} 271 272static DEVICE_ATTR(manufacturer_id, 0444, 273 rmi_driver_manufacturer_id_show, NULL); 274 275static ssize_t rmi_driver_dom_show(struct device *dev, 276 struct device_attribute *dattr, char *buf) 277{ 278 struct rmi_driver_data *data = dev_get_drvdata(dev); 279 struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev); 280 281 return scnprintf(buf, PAGE_SIZE, "%s\n", f01->properties.dom); 282} 283 284static DEVICE_ATTR(date_of_manufacture, 0444, rmi_driver_dom_show, NULL); 285 286static ssize_t rmi_driver_product_id_show(struct device *dev, 287 struct device_attribute *dattr, 288 char *buf) 289{ 290 struct rmi_driver_data *data = dev_get_drvdata(dev); 291 struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev); 292 293 return scnprintf(buf, PAGE_SIZE, "%s\n", f01->properties.product_id); 294} 295 296static DEVICE_ATTR(product_id, 0444, rmi_driver_product_id_show, NULL); 297 298static ssize_t rmi_driver_firmware_id_show(struct device *dev, 299 struct device_attribute *dattr, 300 char *buf) 301{ 302 struct rmi_driver_data *data = dev_get_drvdata(dev); 303 struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev); 304 305 return scnprintf(buf, PAGE_SIZE, "%d\n", f01->properties.firmware_id); 306} 307 308static DEVICE_ATTR(firmware_id, 0444, rmi_driver_firmware_id_show, NULL); 309 310static ssize_t rmi_driver_package_id_show(struct device *dev, 311 struct device_attribute *dattr, 312 char *buf) 313{ 314 struct rmi_driver_data *data = dev_get_drvdata(dev); 315 struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev); 316 317 u32 package_id = f01->properties.package_id; 318 319 return scnprintf(buf, PAGE_SIZE, "%04x.%04x\n", 320 package_id & 0xffff, (package_id >> 16) & 0xffff); 321} 322 323static DEVICE_ATTR(package_id, 0444, rmi_driver_package_id_show, NULL); 324 325static struct attribute *rmi_f01_attrs[] = { 326 &dev_attr_manufacturer_id.attr, 327 &dev_attr_date_of_manufacture.attr, 328 &dev_attr_product_id.attr, 329 &dev_attr_firmware_id.attr, 330 &dev_attr_package_id.attr, 331 NULL 332}; 333 334static const struct attribute_group rmi_f01_attr_group = { 335 .attrs = rmi_f01_attrs, 336}; 337 338#ifdef CONFIG_OF 339static int rmi_f01_of_probe(struct device *dev, 340 struct rmi_device_platform_data *pdata) 341{ 342 int retval; 343 u32 val; 344 345 retval = rmi_of_property_read_u32(dev, 346 (u32 *)&pdata->power_management.nosleep, 347 "syna,nosleep-mode", 1); 348 if (retval) 349 return retval; 350 351 retval = rmi_of_property_read_u32(dev, &val, 352 "syna,wakeup-threshold", 1); 353 if (retval) 354 return retval; 355 356 pdata->power_management.wakeup_threshold = val; 357 358 retval = rmi_of_property_read_u32(dev, &val, 359 "syna,doze-holdoff-ms", 1); 360 if (retval) 361 return retval; 362 363 pdata->power_management.doze_holdoff = val * 100; 364 365 retval = rmi_of_property_read_u32(dev, &val, 366 "syna,doze-interval-ms", 1); 367 if (retval) 368 return retval; 369 370 pdata->power_management.doze_interval = val / 10; 371 372 return 0; 373} 374#else 375static inline int rmi_f01_of_probe(struct device *dev, 376 struct rmi_device_platform_data *pdata) 377{ 378 return -ENODEV; 379} 380#endif 381 382static int rmi_f01_probe(struct rmi_function *fn) 383{ 384 struct rmi_device *rmi_dev = fn->rmi_dev; 385 struct rmi_driver_data *driver_data = dev_get_drvdata(&rmi_dev->dev); 386 struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev); 387 struct f01_data *f01; 388 int error; 389 u16 ctrl_base_addr = fn->fd.control_base_addr; 390 u8 device_status; 391 u8 temp; 392 393 if (fn->dev.of_node) { 394 error = rmi_f01_of_probe(&fn->dev, pdata); 395 if (error) 396 return error; 397 } 398 399 f01 = devm_kzalloc(&fn->dev, sizeof(struct f01_data), GFP_KERNEL); 400 if (!f01) 401 return -ENOMEM; 402 403 f01->num_of_irq_regs = driver_data->num_of_irq_regs; 404 405 /* 406 * Set the configured bit and (optionally) other important stuff 407 * in the device control register. 408 */ 409 410 error = rmi_read(rmi_dev, fn->fd.control_base_addr, 411 &f01->device_control.ctrl0); 412 if (error) { 413 dev_err(&fn->dev, "Failed to read F01 control: %d\n", error); 414 return error; 415 } 416 417 switch (pdata->power_management.nosleep) { 418 case RMI_REG_STATE_DEFAULT: 419 break; 420 case RMI_REG_STATE_OFF: 421 f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_NOSLEEP_BIT; 422 break; 423 case RMI_REG_STATE_ON: 424 f01->device_control.ctrl0 |= RMI_F01_CTRL0_NOSLEEP_BIT; 425 break; 426 } 427 428 /* 429 * Sleep mode might be set as a hangover from a system crash or 430 * reboot without power cycle. If so, clear it so the sensor 431 * is certain to function. 432 */ 433 if ((f01->device_control.ctrl0 & RMI_F01_CTRL0_SLEEP_MODE_MASK) != 434 RMI_SLEEP_MODE_NORMAL) { 435 dev_warn(&fn->dev, 436 "WARNING: Non-zero sleep mode found. Clearing...\n"); 437 f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK; 438 } 439 440 f01->device_control.ctrl0 |= RMI_F01_CTRL0_CONFIGURED_BIT; 441 442 error = rmi_write(rmi_dev, fn->fd.control_base_addr, 443 f01->device_control.ctrl0); 444 if (error) { 445 dev_err(&fn->dev, "Failed to write F01 control: %d\n", error); 446 return error; 447 } 448 449 /* Dummy read in order to clear irqs */ 450 error = rmi_read(rmi_dev, fn->fd.data_base_addr + 1, &temp); 451 if (error < 0) { 452 dev_err(&fn->dev, "Failed to read Interrupt Status.\n"); 453 return error; 454 } 455 456 error = rmi_f01_read_properties(rmi_dev, fn->fd.query_base_addr, 457 &f01->properties); 458 if (error < 0) { 459 dev_err(&fn->dev, "Failed to read F01 properties.\n"); 460 return error; 461 } 462 463 dev_info(&fn->dev, "found RMI device, manufacturer: %s, product: %s, fw id: %d\n", 464 f01->properties.manufacturer_id == 1 ? "Synaptics" : "unknown", 465 f01->properties.product_id, f01->properties.firmware_id); 466 467 /* Advance to interrupt control registers, then skip over them. */ 468 ctrl_base_addr++; 469 ctrl_base_addr += f01->num_of_irq_regs; 470 471 /* read control register */ 472 if (f01->properties.has_adjustable_doze) { 473 f01->doze_interval_addr = ctrl_base_addr; 474 ctrl_base_addr++; 475 476 if (pdata->power_management.doze_interval) { 477 f01->device_control.doze_interval = 478 pdata->power_management.doze_interval; 479 error = rmi_write(rmi_dev, f01->doze_interval_addr, 480 f01->device_control.doze_interval); 481 if (error) { 482 dev_err(&fn->dev, 483 "Failed to configure F01 doze interval register: %d\n", 484 error); 485 return error; 486 } 487 } else { 488 error = rmi_read(rmi_dev, f01->doze_interval_addr, 489 &f01->device_control.doze_interval); 490 if (error) { 491 dev_err(&fn->dev, 492 "Failed to read F01 doze interval register: %d\n", 493 error); 494 return error; 495 } 496 } 497 498 f01->wakeup_threshold_addr = ctrl_base_addr; 499 ctrl_base_addr++; 500 501 if (pdata->power_management.wakeup_threshold) { 502 f01->device_control.wakeup_threshold = 503 pdata->power_management.wakeup_threshold; 504 error = rmi_write(rmi_dev, f01->wakeup_threshold_addr, 505 f01->device_control.wakeup_threshold); 506 if (error) { 507 dev_err(&fn->dev, 508 "Failed to configure F01 wakeup threshold register: %d\n", 509 error); 510 return error; 511 } 512 } else { 513 error = rmi_read(rmi_dev, f01->wakeup_threshold_addr, 514 &f01->device_control.wakeup_threshold); 515 if (error < 0) { 516 dev_err(&fn->dev, 517 "Failed to read F01 wakeup threshold register: %d\n", 518 error); 519 return error; 520 } 521 } 522 } 523 524 if (f01->properties.has_lts) 525 ctrl_base_addr++; 526 527 if (f01->properties.has_adjustable_doze_holdoff) { 528 f01->doze_holdoff_addr = ctrl_base_addr; 529 ctrl_base_addr++; 530 531 if (pdata->power_management.doze_holdoff) { 532 f01->device_control.doze_holdoff = 533 pdata->power_management.doze_holdoff; 534 error = rmi_write(rmi_dev, f01->doze_holdoff_addr, 535 f01->device_control.doze_holdoff); 536 if (error) { 537 dev_err(&fn->dev, 538 "Failed to configure F01 doze holdoff register: %d\n", 539 error); 540 return error; 541 } 542 } else { 543 error = rmi_read(rmi_dev, f01->doze_holdoff_addr, 544 &f01->device_control.doze_holdoff); 545 if (error) { 546 dev_err(&fn->dev, 547 "Failed to read F01 doze holdoff register: %d\n", 548 error); 549 return error; 550 } 551 } 552 } 553 554 error = rmi_read(rmi_dev, fn->fd.data_base_addr, &device_status); 555 if (error < 0) { 556 dev_err(&fn->dev, 557 "Failed to read device status: %d\n", error); 558 return error; 559 } 560 561 if (RMI_F01_STATUS_UNCONFIGURED(device_status)) { 562 dev_err(&fn->dev, 563 "Device was reset during configuration process, status: %#02x!\n", 564 RMI_F01_STATUS_CODE(device_status)); 565 return -EINVAL; 566 } 567 568 dev_set_drvdata(&fn->dev, f01); 569 570 error = sysfs_create_group(&fn->rmi_dev->dev.kobj, &rmi_f01_attr_group); 571 if (error) 572 dev_warn(&fn->dev, "Failed to create sysfs group: %d\n", error); 573 574 return 0; 575} 576 577static void rmi_f01_remove(struct rmi_function *fn) 578{ 579 /* Note that the bus device is used, not the F01 device */ 580 sysfs_remove_group(&fn->rmi_dev->dev.kobj, &rmi_f01_attr_group); 581} 582 583static int rmi_f01_config(struct rmi_function *fn) 584{ 585 struct f01_data *f01 = dev_get_drvdata(&fn->dev); 586 int error; 587 588 error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr, 589 f01->device_control.ctrl0); 590 if (error) { 591 dev_err(&fn->dev, 592 "Failed to write device_control register: %d\n", error); 593 return error; 594 } 595 596 if (f01->properties.has_adjustable_doze) { 597 error = rmi_write(fn->rmi_dev, f01->doze_interval_addr, 598 f01->device_control.doze_interval); 599 if (error) { 600 dev_err(&fn->dev, 601 "Failed to write doze interval: %d\n", error); 602 return error; 603 } 604 605 error = rmi_write_block(fn->rmi_dev, 606 f01->wakeup_threshold_addr, 607 &f01->device_control.wakeup_threshold, 608 sizeof(u8)); 609 if (error) { 610 dev_err(&fn->dev, 611 "Failed to write wakeup threshold: %d\n", 612 error); 613 return error; 614 } 615 } 616 617 if (f01->properties.has_adjustable_doze_holdoff) { 618 error = rmi_write(fn->rmi_dev, f01->doze_holdoff_addr, 619 f01->device_control.doze_holdoff); 620 if (error) { 621 dev_err(&fn->dev, 622 "Failed to write doze holdoff: %d\n", error); 623 return error; 624 } 625 } 626 627 return 0; 628} 629 630static int rmi_f01_suspend(struct rmi_function *fn) 631{ 632 struct f01_data *f01 = dev_get_drvdata(&fn->dev); 633 int error; 634 635 f01->old_nosleep = 636 f01->device_control.ctrl0 & RMI_F01_CTRL0_NOSLEEP_BIT; 637 f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_NOSLEEP_BIT; 638 639 f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK; 640 if (device_may_wakeup(fn->rmi_dev->xport->dev)) 641 f01->device_control.ctrl0 |= RMI_SLEEP_MODE_RESERVED1; 642 else 643 f01->device_control.ctrl0 |= RMI_SLEEP_MODE_SENSOR_SLEEP; 644 645 error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr, 646 f01->device_control.ctrl0); 647 if (error) { 648 dev_err(&fn->dev, "Failed to write sleep mode: %d.\n", error); 649 if (f01->old_nosleep) 650 f01->device_control.ctrl0 |= RMI_F01_CTRL0_NOSLEEP_BIT; 651 f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK; 652 f01->device_control.ctrl0 |= RMI_SLEEP_MODE_NORMAL; 653 return error; 654 } 655 656 return 0; 657} 658 659static int rmi_f01_resume(struct rmi_function *fn) 660{ 661 struct f01_data *f01 = dev_get_drvdata(&fn->dev); 662 int error; 663 664 if (f01->old_nosleep) 665 f01->device_control.ctrl0 |= RMI_F01_CTRL0_NOSLEEP_BIT; 666 667 f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK; 668 f01->device_control.ctrl0 |= RMI_SLEEP_MODE_NORMAL; 669 670 error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr, 671 f01->device_control.ctrl0); 672 if (error) { 673 dev_err(&fn->dev, 674 "Failed to restore normal operation: %d.\n", error); 675 return error; 676 } 677 678 return 0; 679} 680 681static irqreturn_t rmi_f01_attention(int irq, void *ctx) 682{ 683 struct rmi_function *fn = ctx; 684 struct rmi_device *rmi_dev = fn->rmi_dev; 685 int error; 686 u8 device_status; 687 688 error = rmi_read(rmi_dev, fn->fd.data_base_addr, &device_status); 689 if (error) { 690 dev_err(&fn->dev, 691 "Failed to read device status: %d.\n", error); 692 return IRQ_RETVAL(error); 693 } 694 695 if (RMI_F01_STATUS_BOOTLOADER(device_status)) 696 dev_warn(&fn->dev, 697 "Device in bootloader mode, please update firmware\n"); 698 699 if (RMI_F01_STATUS_UNCONFIGURED(device_status)) { 700 dev_warn(&fn->dev, "Device reset detected.\n"); 701 error = rmi_dev->driver->reset_handler(rmi_dev); 702 if (error) { 703 dev_err(&fn->dev, "Device reset failed: %d\n", error); 704 return IRQ_RETVAL(error); 705 } 706 } 707 708 return IRQ_HANDLED; 709} 710 711struct rmi_function_handler rmi_f01_handler = { 712 .driver = { 713 .name = "rmi4_f01", 714 /* 715 * Do not allow user unbinding F01 as it is critical 716 * function. 717 */ 718 .suppress_bind_attrs = true, 719 }, 720 .func = 0x01, 721 .probe = rmi_f01_probe, 722 .remove = rmi_f01_remove, 723 .config = rmi_f01_config, 724 .attention = rmi_f01_attention, 725 .suspend = rmi_f01_suspend, 726 .resume = rmi_f01_resume, 727}; 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