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 * struct f01_device_control - controls basic sensor functions 107 * 108 * @ctrl0: see the bit definitions above. 109 * @doze_interval: controls the interval between checks for finger presence 110 * when the touch sensor is in doze mode, in units of 10ms. 111 * @wakeup_threshold: controls the capacitance threshold at which the touch 112 * sensor will decide to wake up from that low power state. 113 * @doze_holdoff: controls how long the touch sensor waits after the last 114 * finger lifts before entering the doze state, in units of 100ms. 115 */ 116struct f01_device_control { 117 u8 ctrl0; 118 u8 doze_interval; 119 u8 wakeup_threshold; 120 u8 doze_holdoff; 121}; 122 123struct f01_data { 124 struct f01_basic_properties properties; 125 struct f01_device_control device_control; 126 127 u16 doze_interval_addr; 128 u16 wakeup_threshold_addr; 129 u16 doze_holdoff_addr; 130 131 bool suspended; 132 bool old_nosleep; 133 134 unsigned int num_of_irq_regs; 135}; 136 137static int rmi_f01_read_properties(struct rmi_device *rmi_dev, 138 u16 query_base_addr, 139 struct f01_basic_properties *props) 140{ 141 u8 queries[RMI_F01_BASIC_QUERY_LEN]; 142 int ret; 143 int query_offset = query_base_addr; 144 bool has_ds4_queries = false; 145 bool has_query42 = false; 146 bool has_sensor_id = false; 147 bool has_package_id_query = false; 148 bool has_build_id_query = false; 149 u16 prod_info_addr; 150 u8 ds4_query_len; 151 152 ret = rmi_read_block(rmi_dev, query_offset, 153 queries, RMI_F01_BASIC_QUERY_LEN); 154 if (ret) { 155 dev_err(&rmi_dev->dev, 156 "Failed to read device query registers: %d\n", ret); 157 return ret; 158 } 159 160 prod_info_addr = query_offset + 17; 161 query_offset += RMI_F01_BASIC_QUERY_LEN; 162 163 /* Now parse what we got */ 164 props->manufacturer_id = queries[0]; 165 166 props->has_lts = queries[1] & RMI_F01_QRY1_HAS_LTS; 167 props->has_adjustable_doze = 168 queries[1] & RMI_F01_QRY1_HAS_ADJ_DOZE; 169 props->has_adjustable_doze_holdoff = 170 queries[1] & RMI_F01_QRY1_HAS_ADJ_DOZE_HOFF; 171 has_query42 = queries[1] & RMI_F01_QRY1_HAS_QUERY42; 172 has_sensor_id = queries[1] & RMI_F01_QRY1_HAS_SENSOR_ID; 173 174 snprintf(props->dom, sizeof(props->dom), "20%02d/%02d/%02d", 175 queries[5] & RMI_F01_QRY5_YEAR_MASK, 176 queries[6] & RMI_F01_QRY6_MONTH_MASK, 177 queries[7] & RMI_F01_QRY7_DAY_MASK); 178 179 memcpy(props->product_id, &queries[11], 180 RMI_PRODUCT_ID_LENGTH); 181 props->product_id[RMI_PRODUCT_ID_LENGTH] = '\0'; 182 183 props->productinfo = 184 ((queries[2] & RMI_F01_QRY2_PRODINFO_MASK) << 7) | 185 (queries[3] & RMI_F01_QRY2_PRODINFO_MASK); 186 187 if (has_sensor_id) 188 query_offset++; 189 190 if (has_query42) { 191 ret = rmi_read(rmi_dev, query_offset, queries); 192 if (ret) { 193 dev_err(&rmi_dev->dev, 194 "Failed to read query 42 register: %d\n", ret); 195 return ret; 196 } 197 198 has_ds4_queries = !!(queries[0] & BIT(0)); 199 query_offset++; 200 } 201 202 if (has_ds4_queries) { 203 ret = rmi_read(rmi_dev, query_offset, &ds4_query_len); 204 if (ret) { 205 dev_err(&rmi_dev->dev, 206 "Failed to read DS4 queries length: %d\n", ret); 207 return ret; 208 } 209 query_offset++; 210 211 if (ds4_query_len > 0) { 212 ret = rmi_read(rmi_dev, query_offset, queries); 213 if (ret) { 214 dev_err(&rmi_dev->dev, 215 "Failed to read DS4 queries: %d\n", 216 ret); 217 return ret; 218 } 219 220 has_package_id_query = !!(queries[0] & BIT(0)); 221 has_build_id_query = !!(queries[0] & BIT(1)); 222 } 223 224 if (has_package_id_query) { 225 ret = rmi_read_block(rmi_dev, prod_info_addr, 226 queries, sizeof(__le64)); 227 if (ret) { 228 dev_err(&rmi_dev->dev, 229 "Failed to read package info: %d\n", 230 ret); 231 return ret; 232 } 233 234 props->package_id = get_unaligned_le64(queries); 235 prod_info_addr++; 236 } 237 238 if (has_build_id_query) { 239 ret = rmi_read_block(rmi_dev, prod_info_addr, queries, 240 3); 241 if (ret) { 242 dev_err(&rmi_dev->dev, 243 "Failed to read product info: %d\n", 244 ret); 245 return ret; 246 } 247 248 props->firmware_id = queries[1] << 8 | queries[0]; 249 props->firmware_id += queries[2] * 65536; 250 } 251 } 252 253 return 0; 254} 255 256const char *rmi_f01_get_product_ID(struct rmi_function *fn) 257{ 258 struct f01_data *f01 = dev_get_drvdata(&fn->dev); 259 260 return f01->properties.product_id; 261} 262 263static ssize_t rmi_driver_manufacturer_id_show(struct device *dev, 264 struct device_attribute *dattr, 265 char *buf) 266{ 267 struct rmi_driver_data *data = dev_get_drvdata(dev); 268 struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev); 269 270 return sysfs_emit(buf, "%d\n", f01->properties.manufacturer_id); 271} 272 273static DEVICE_ATTR(manufacturer_id, 0444, 274 rmi_driver_manufacturer_id_show, NULL); 275 276static ssize_t rmi_driver_dom_show(struct device *dev, 277 struct device_attribute *dattr, char *buf) 278{ 279 struct rmi_driver_data *data = dev_get_drvdata(dev); 280 struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev); 281 282 return sysfs_emit(buf, "%s\n", f01->properties.dom); 283} 284 285static DEVICE_ATTR(date_of_manufacture, 0444, rmi_driver_dom_show, NULL); 286 287static ssize_t rmi_driver_product_id_show(struct device *dev, 288 struct device_attribute *dattr, 289 char *buf) 290{ 291 struct rmi_driver_data *data = dev_get_drvdata(dev); 292 struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev); 293 294 return sysfs_emit(buf, "%s\n", f01->properties.product_id); 295} 296 297static DEVICE_ATTR(product_id, 0444, rmi_driver_product_id_show, NULL); 298 299static ssize_t rmi_driver_firmware_id_show(struct device *dev, 300 struct device_attribute *dattr, 301 char *buf) 302{ 303 struct rmi_driver_data *data = dev_get_drvdata(dev); 304 struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev); 305 306 return sysfs_emit(buf, "%d\n", f01->properties.firmware_id); 307} 308 309static DEVICE_ATTR(firmware_id, 0444, rmi_driver_firmware_id_show, NULL); 310 311static ssize_t rmi_driver_package_id_show(struct device *dev, 312 struct device_attribute *dattr, 313 char *buf) 314{ 315 struct rmi_driver_data *data = dev_get_drvdata(dev); 316 struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev); 317 318 u32 package_id = f01->properties.package_id; 319 320 return sysfs_emit(buf, "%04x.%04x\n", 321 package_id & 0xffff, (package_id >> 16) & 0xffff); 322} 323 324static DEVICE_ATTR(package_id, 0444, rmi_driver_package_id_show, NULL); 325 326static struct attribute *rmi_f01_attrs[] = { 327 &dev_attr_manufacturer_id.attr, 328 &dev_attr_date_of_manufacture.attr, 329 &dev_attr_product_id.attr, 330 &dev_attr_firmware_id.attr, 331 &dev_attr_package_id.attr, 332 NULL 333}; 334 335static const struct attribute_group rmi_f01_attr_group = { 336 .attrs = rmi_f01_attrs, 337}; 338 339#ifdef CONFIG_OF 340static int rmi_f01_of_probe(struct device *dev, 341 struct rmi_device_platform_data *pdata) 342{ 343 int retval; 344 u32 val; 345 346 retval = rmi_of_property_read_u32(dev, 347 (u32 *)&pdata->power_management.nosleep, 348 "syna,nosleep-mode", 1); 349 if (retval) 350 return retval; 351 352 retval = rmi_of_property_read_u32(dev, &val, 353 "syna,wakeup-threshold", 1); 354 if (retval) 355 return retval; 356 357 pdata->power_management.wakeup_threshold = val; 358 359 retval = rmi_of_property_read_u32(dev, &val, 360 "syna,doze-holdoff-ms", 1); 361 if (retval) 362 return retval; 363 364 pdata->power_management.doze_holdoff = val * 100; 365 366 retval = rmi_of_property_read_u32(dev, &val, 367 "syna,doze-interval-ms", 1); 368 if (retval) 369 return retval; 370 371 pdata->power_management.doze_interval = val / 10; 372 373 return 0; 374} 375#else 376static inline int rmi_f01_of_probe(struct device *dev, 377 struct rmi_device_platform_data *pdata) 378{ 379 return -ENODEV; 380} 381#endif 382 383static int rmi_f01_probe(struct rmi_function *fn) 384{ 385 struct rmi_device *rmi_dev = fn->rmi_dev; 386 struct rmi_driver_data *driver_data = dev_get_drvdata(&rmi_dev->dev); 387 struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev); 388 struct f01_data *f01; 389 int error; 390 u16 ctrl_base_addr = fn->fd.control_base_addr; 391 u8 device_status; 392 u8 temp; 393 394 if (fn->dev.of_node) { 395 error = rmi_f01_of_probe(&fn->dev, pdata); 396 if (error) 397 return error; 398 } 399 400 f01 = devm_kzalloc(&fn->dev, sizeof(struct f01_data), GFP_KERNEL); 401 if (!f01) 402 return -ENOMEM; 403 404 f01->num_of_irq_regs = driver_data->num_of_irq_regs; 405 406 /* 407 * Set the configured bit and (optionally) other important stuff 408 * in the device control register. 409 */ 410 411 error = rmi_read(rmi_dev, fn->fd.control_base_addr, 412 &f01->device_control.ctrl0); 413 if (error) { 414 dev_err(&fn->dev, "Failed to read F01 control: %d\n", error); 415 return error; 416 } 417 418 switch (pdata->power_management.nosleep) { 419 case RMI_REG_STATE_DEFAULT: 420 break; 421 case RMI_REG_STATE_OFF: 422 f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_NOSLEEP_BIT; 423 break; 424 case RMI_REG_STATE_ON: 425 f01->device_control.ctrl0 |= RMI_F01_CTRL0_NOSLEEP_BIT; 426 break; 427 } 428 429 /* 430 * Sleep mode might be set as a hangover from a system crash or 431 * reboot without power cycle. If so, clear it so the sensor 432 * is certain to function. 433 */ 434 if ((f01->device_control.ctrl0 & RMI_F01_CTRL0_SLEEP_MODE_MASK) != 435 RMI_SLEEP_MODE_NORMAL) { 436 dev_warn(&fn->dev, 437 "WARNING: Non-zero sleep mode found. Clearing...\n"); 438 f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK; 439 } 440 441 f01->device_control.ctrl0 |= RMI_F01_CTRL0_CONFIGURED_BIT; 442 443 error = rmi_write(rmi_dev, fn->fd.control_base_addr, 444 f01->device_control.ctrl0); 445 if (error) { 446 dev_err(&fn->dev, "Failed to write F01 control: %d\n", error); 447 return error; 448 } 449 450 /* Dummy read in order to clear irqs */ 451 error = rmi_read(rmi_dev, fn->fd.data_base_addr + 1, &temp); 452 if (error < 0) { 453 dev_err(&fn->dev, "Failed to read Interrupt Status.\n"); 454 return error; 455 } 456 457 error = rmi_f01_read_properties(rmi_dev, fn->fd.query_base_addr, 458 &f01->properties); 459 if (error < 0) { 460 dev_err(&fn->dev, "Failed to read F01 properties.\n"); 461 return error; 462 } 463 464 dev_info(&fn->dev, "found RMI device, manufacturer: %s, product: %s, fw id: %d\n", 465 f01->properties.manufacturer_id == 1 ? "Synaptics" : "unknown", 466 f01->properties.product_id, f01->properties.firmware_id); 467 468 /* Advance to interrupt control registers, then skip over them. */ 469 ctrl_base_addr++; 470 ctrl_base_addr += f01->num_of_irq_regs; 471 472 /* read control register */ 473 if (f01->properties.has_adjustable_doze) { 474 f01->doze_interval_addr = ctrl_base_addr; 475 ctrl_base_addr++; 476 477 if (pdata->power_management.doze_interval) { 478 f01->device_control.doze_interval = 479 pdata->power_management.doze_interval; 480 error = rmi_write(rmi_dev, f01->doze_interval_addr, 481 f01->device_control.doze_interval); 482 if (error) { 483 dev_err(&fn->dev, 484 "Failed to configure F01 doze interval register: %d\n", 485 error); 486 return error; 487 } 488 } else { 489 error = rmi_read(rmi_dev, f01->doze_interval_addr, 490 &f01->device_control.doze_interval); 491 if (error) { 492 dev_err(&fn->dev, 493 "Failed to read F01 doze interval register: %d\n", 494 error); 495 return error; 496 } 497 } 498 499 f01->wakeup_threshold_addr = ctrl_base_addr; 500 ctrl_base_addr++; 501 502 if (pdata->power_management.wakeup_threshold) { 503 f01->device_control.wakeup_threshold = 504 pdata->power_management.wakeup_threshold; 505 error = rmi_write(rmi_dev, f01->wakeup_threshold_addr, 506 f01->device_control.wakeup_threshold); 507 if (error) { 508 dev_err(&fn->dev, 509 "Failed to configure F01 wakeup threshold register: %d\n", 510 error); 511 return error; 512 } 513 } else { 514 error = rmi_read(rmi_dev, f01->wakeup_threshold_addr, 515 &f01->device_control.wakeup_threshold); 516 if (error < 0) { 517 dev_err(&fn->dev, 518 "Failed to read F01 wakeup threshold register: %d\n", 519 error); 520 return error; 521 } 522 } 523 } 524 525 if (f01->properties.has_lts) 526 ctrl_base_addr++; 527 528 if (f01->properties.has_adjustable_doze_holdoff) { 529 f01->doze_holdoff_addr = ctrl_base_addr; 530 ctrl_base_addr++; 531 532 if (pdata->power_management.doze_holdoff) { 533 f01->device_control.doze_holdoff = 534 pdata->power_management.doze_holdoff; 535 error = rmi_write(rmi_dev, f01->doze_holdoff_addr, 536 f01->device_control.doze_holdoff); 537 if (error) { 538 dev_err(&fn->dev, 539 "Failed to configure F01 doze holdoff register: %d\n", 540 error); 541 return error; 542 } 543 } else { 544 error = rmi_read(rmi_dev, f01->doze_holdoff_addr, 545 &f01->device_control.doze_holdoff); 546 if (error) { 547 dev_err(&fn->dev, 548 "Failed to read F01 doze holdoff register: %d\n", 549 error); 550 return error; 551 } 552 } 553 } 554 555 error = rmi_read(rmi_dev, fn->fd.data_base_addr, &device_status); 556 if (error < 0) { 557 dev_err(&fn->dev, 558 "Failed to read device status: %d\n", error); 559 return error; 560 } 561 562 if (RMI_F01_STATUS_UNCONFIGURED(device_status)) { 563 dev_err(&fn->dev, 564 "Device was reset during configuration process, status: %#02x!\n", 565 RMI_F01_STATUS_CODE(device_status)); 566 return -EINVAL; 567 } 568 569 dev_set_drvdata(&fn->dev, f01); 570 571 error = sysfs_create_group(&fn->rmi_dev->dev.kobj, &rmi_f01_attr_group); 572 if (error) 573 dev_warn(&fn->dev, "Failed to create sysfs group: %d\n", error); 574 575 return 0; 576} 577 578static void rmi_f01_remove(struct rmi_function *fn) 579{ 580 /* Note that the bus device is used, not the F01 device */ 581 sysfs_remove_group(&fn->rmi_dev->dev.kobj, &rmi_f01_attr_group); 582} 583 584static int rmi_f01_config(struct rmi_function *fn) 585{ 586 struct f01_data *f01 = dev_get_drvdata(&fn->dev); 587 int error; 588 589 error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr, 590 f01->device_control.ctrl0); 591 if (error) { 592 dev_err(&fn->dev, 593 "Failed to write device_control register: %d\n", error); 594 return error; 595 } 596 597 if (f01->properties.has_adjustable_doze) { 598 error = rmi_write(fn->rmi_dev, f01->doze_interval_addr, 599 f01->device_control.doze_interval); 600 if (error) { 601 dev_err(&fn->dev, 602 "Failed to write doze interval: %d\n", error); 603 return error; 604 } 605 606 error = rmi_write_block(fn->rmi_dev, 607 f01->wakeup_threshold_addr, 608 &f01->device_control.wakeup_threshold, 609 sizeof(u8)); 610 if (error) { 611 dev_err(&fn->dev, 612 "Failed to write wakeup threshold: %d\n", 613 error); 614 return error; 615 } 616 } 617 618 if (f01->properties.has_adjustable_doze_holdoff) { 619 error = rmi_write(fn->rmi_dev, f01->doze_holdoff_addr, 620 f01->device_control.doze_holdoff); 621 if (error) { 622 dev_err(&fn->dev, 623 "Failed to write doze holdoff: %d\n", error); 624 return error; 625 } 626 } 627 628 return 0; 629} 630 631static int rmi_f01_suspend(struct rmi_function *fn) 632{ 633 struct f01_data *f01 = dev_get_drvdata(&fn->dev); 634 int error; 635 636 f01->old_nosleep = 637 f01->device_control.ctrl0 & RMI_F01_CTRL0_NOSLEEP_BIT; 638 f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_NOSLEEP_BIT; 639 640 f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK; 641 if (device_may_wakeup(fn->rmi_dev->xport->dev)) 642 f01->device_control.ctrl0 |= RMI_SLEEP_MODE_RESERVED1; 643 else 644 f01->device_control.ctrl0 |= RMI_SLEEP_MODE_SENSOR_SLEEP; 645 646 error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr, 647 f01->device_control.ctrl0); 648 if (error) { 649 dev_err(&fn->dev, "Failed to write sleep mode: %d.\n", error); 650 if (f01->old_nosleep) 651 f01->device_control.ctrl0 |= RMI_F01_CTRL0_NOSLEEP_BIT; 652 f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK; 653 f01->device_control.ctrl0 |= RMI_SLEEP_MODE_NORMAL; 654 return error; 655 } 656 657 return 0; 658} 659 660static int rmi_f01_resume(struct rmi_function *fn) 661{ 662 struct f01_data *f01 = dev_get_drvdata(&fn->dev); 663 int error; 664 665 if (f01->old_nosleep) 666 f01->device_control.ctrl0 |= RMI_F01_CTRL0_NOSLEEP_BIT; 667 668 f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK; 669 f01->device_control.ctrl0 |= RMI_SLEEP_MODE_NORMAL; 670 671 error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr, 672 f01->device_control.ctrl0); 673 if (error) { 674 dev_err(&fn->dev, 675 "Failed to restore normal operation: %d.\n", error); 676 return error; 677 } 678 679 return 0; 680} 681 682static irqreturn_t rmi_f01_attention(int irq, void *ctx) 683{ 684 struct rmi_function *fn = ctx; 685 struct rmi_device *rmi_dev = fn->rmi_dev; 686 int error; 687 u8 device_status; 688 689 error = rmi_read(rmi_dev, fn->fd.data_base_addr, &device_status); 690 if (error) { 691 dev_err(&fn->dev, 692 "Failed to read device status: %d.\n", error); 693 return IRQ_RETVAL(error); 694 } 695 696 if (RMI_F01_STATUS_BOOTLOADER(device_status)) 697 dev_warn(&fn->dev, 698 "Device in bootloader mode, please update firmware\n"); 699 700 if (RMI_F01_STATUS_UNCONFIGURED(device_status)) { 701 dev_warn(&fn->dev, "Device reset detected.\n"); 702 error = rmi_dev->driver->reset_handler(rmi_dev); 703 if (error) { 704 dev_err(&fn->dev, "Device reset failed: %d\n", error); 705 return IRQ_RETVAL(error); 706 } 707 } 708 709 return IRQ_HANDLED; 710} 711 712struct rmi_function_handler rmi_f01_handler = { 713 .driver = { 714 .name = "rmi4_f01", 715 /* 716 * Do not allow user unbinding F01 as it is critical 717 * function. 718 */ 719 .suppress_bind_attrs = true, 720 }, 721 .func = 0x01, 722 .probe = rmi_f01_probe, 723 .remove = rmi_f01_remove, 724 .config = rmi_f01_config, 725 .attention = rmi_f01_attention, 726 .suspend = rmi_f01_suspend, 727 .resume = rmi_f01_resume, 728}; 729