1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2012-2015 Synaptics Incorporated 4 * Copyright (C) 2016 Zodiac Inflight Innovations 5 */ 6 7 #include <linux/kernel.h> 8 #include <linux/rmi.h> 9 #include <linux/input.h> 10 #include <linux/slab.h> 11 #include <linux/delay.h> 12 #include <linux/i2c.h> 13 #include <media/v4l2-device.h> 14 #include <media/v4l2-ioctl.h> 15 #include <media/videobuf2-v4l2.h> 16 #include <media/videobuf2-vmalloc.h> 17 #include "rmi_driver.h" 18 19 #define F54_NAME "rmi4_f54" 20 21 /* F54 data offsets */ 22 #define F54_REPORT_DATA_OFFSET 3 23 #define F54_FIFO_OFFSET 1 24 #define F54_NUM_TX_OFFSET 1 25 #define F54_NUM_RX_OFFSET 0 26 27 /* F54 commands */ 28 #define F54_GET_REPORT 1 29 #define F54_FORCE_CAL 2 30 31 /* F54 capabilities */ 32 #define F54_CAP_BASELINE (1 << 2) 33 #define F54_CAP_IMAGE8 (1 << 3) 34 #define F54_CAP_IMAGE16 (1 << 6) 35 36 /** 37 * enum rmi_f54_report_type - RMI4 F54 report types 38 * 39 * @F54_8BIT_IMAGE: Normalized 8-Bit Image Report. The capacitance variance 40 * from baseline for each pixel. 41 * 42 * @F54_16BIT_IMAGE: Normalized 16-Bit Image Report. The capacitance variance 43 * from baseline for each pixel. 44 * 45 * @F54_RAW_16BIT_IMAGE: 46 * Raw 16-Bit Image Report. The raw capacitance for each 47 * pixel. 48 * 49 * @F54_TRUE_BASELINE: True Baseline Report. The baseline capacitance for each 50 * pixel. 51 * 52 * @F54_FULL_RAW_CAP: Full Raw Capacitance Report. The raw capacitance with 53 * low reference set to its minimum value and high 54 * reference set to its maximum value. 55 * 56 * @F54_FULL_RAW_CAP_RX_OFFSET_REMOVED: 57 * Full Raw Capacitance with Receiver Offset Removed 58 * Report. Set Low reference to its minimum value and high 59 * references to its maximum value, then report the raw 60 * capacitance for each pixel. 61 */ 62 enum rmi_f54_report_type { 63 F54_REPORT_NONE = 0, 64 F54_8BIT_IMAGE = 1, 65 F54_16BIT_IMAGE = 2, 66 F54_RAW_16BIT_IMAGE = 3, 67 F54_TRUE_BASELINE = 9, 68 F54_FULL_RAW_CAP = 19, 69 F54_FULL_RAW_CAP_RX_OFFSET_REMOVED = 20, 70 F54_MAX_REPORT_TYPE, 71 }; 72 73 static const char * const rmi_f54_report_type_names[] = { 74 [F54_REPORT_NONE] = "Unknown", 75 [F54_8BIT_IMAGE] = "Normalized 8-Bit Image", 76 [F54_16BIT_IMAGE] = "Normalized 16-Bit Image", 77 [F54_RAW_16BIT_IMAGE] = "Raw 16-Bit Image", 78 [F54_TRUE_BASELINE] = "True Baseline", 79 [F54_FULL_RAW_CAP] = "Full Raw Capacitance", 80 [F54_FULL_RAW_CAP_RX_OFFSET_REMOVED] 81 = "Full Raw Capacitance RX Offset Removed", 82 }; 83 84 struct rmi_f54_reports { 85 int start; 86 int size; 87 }; 88 89 struct f54_data { 90 struct rmi_function *fn; 91 92 u8 num_rx_electrodes; 93 u8 num_tx_electrodes; 94 u8 capabilities; 95 u16 clock_rate; 96 u8 family; 97 98 enum rmi_f54_report_type report_type; 99 u8 *report_data; 100 int report_size; 101 struct rmi_f54_reports standard_report[2]; 102 103 bool is_busy; 104 struct mutex status_mutex; 105 struct mutex data_mutex; 106 107 struct workqueue_struct *workqueue; 108 struct delayed_work work; 109 unsigned long timeout; 110 111 struct completion cmd_done; 112 113 /* V4L2 support */ 114 struct v4l2_device v4l2; 115 struct v4l2_pix_format format; 116 struct video_device vdev; 117 struct vb2_queue queue; 118 struct mutex lock; 119 int input; 120 enum rmi_f54_report_type inputs[F54_MAX_REPORT_TYPE]; 121 }; 122 123 /* 124 * Basic checks on report_type to ensure we write a valid type 125 * to the sensor. 126 */ 127 static bool is_f54_report_type_valid(struct f54_data *f54, 128 enum rmi_f54_report_type reptype) 129 { 130 switch (reptype) { 131 case F54_8BIT_IMAGE: 132 return f54->capabilities & F54_CAP_IMAGE8; 133 case F54_16BIT_IMAGE: 134 case F54_RAW_16BIT_IMAGE: 135 return f54->capabilities & F54_CAP_IMAGE16; 136 case F54_TRUE_BASELINE: 137 return f54->capabilities & F54_CAP_IMAGE16; 138 case F54_FULL_RAW_CAP: 139 case F54_FULL_RAW_CAP_RX_OFFSET_REMOVED: 140 return true; 141 default: 142 return false; 143 } 144 } 145 146 static enum rmi_f54_report_type rmi_f54_get_reptype(struct f54_data *f54, 147 unsigned int i) 148 { 149 if (i >= F54_MAX_REPORT_TYPE) 150 return F54_REPORT_NONE; 151 152 return f54->inputs[i]; 153 } 154 155 static void rmi_f54_create_input_map(struct f54_data *f54) 156 { 157 int i = 0; 158 enum rmi_f54_report_type reptype; 159 160 for (reptype = 1; reptype < F54_MAX_REPORT_TYPE; reptype++) { 161 if (!is_f54_report_type_valid(f54, reptype)) 162 continue; 163 164 f54->inputs[i++] = reptype; 165 } 166 167 /* Remaining values are zero via kzalloc */ 168 } 169 170 static int rmi_f54_request_report(struct rmi_function *fn, u8 report_type) 171 { 172 struct f54_data *f54 = dev_get_drvdata(&fn->dev); 173 struct rmi_device *rmi_dev = fn->rmi_dev; 174 int error; 175 176 /* Write Report Type into F54_AD_Data0 */ 177 if (f54->report_type != report_type) { 178 error = rmi_write(rmi_dev, f54->fn->fd.data_base_addr, 179 report_type); 180 if (error) 181 return error; 182 f54->report_type = report_type; 183 } 184 185 /* 186 * Small delay after disabling interrupts to avoid race condition 187 * in firmare. This value is a bit higher than absolutely necessary. 188 * Should be removed once issue is resolved in firmware. 189 */ 190 usleep_range(2000, 3000); 191 192 mutex_lock(&f54->data_mutex); 193 194 error = rmi_write(rmi_dev, fn->fd.command_base_addr, F54_GET_REPORT); 195 if (error < 0) 196 goto unlock; 197 198 init_completion(&f54->cmd_done); 199 200 f54->is_busy = 1; 201 f54->timeout = jiffies + msecs_to_jiffies(100); 202 203 queue_delayed_work(f54->workqueue, &f54->work, 0); 204 205 unlock: 206 mutex_unlock(&f54->data_mutex); 207 208 return error; 209 } 210 211 static size_t rmi_f54_get_report_size(struct f54_data *f54) 212 { 213 struct rmi_device *rmi_dev = f54->fn->rmi_dev; 214 struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev); 215 u8 rx = drv_data->num_rx_electrodes ? : f54->num_rx_electrodes; 216 u8 tx = drv_data->num_tx_electrodes ? : f54->num_tx_electrodes; 217 size_t size; 218 219 switch (rmi_f54_get_reptype(f54, f54->input)) { 220 case F54_8BIT_IMAGE: 221 size = rx * tx; 222 break; 223 case F54_16BIT_IMAGE: 224 case F54_RAW_16BIT_IMAGE: 225 case F54_TRUE_BASELINE: 226 case F54_FULL_RAW_CAP: 227 case F54_FULL_RAW_CAP_RX_OFFSET_REMOVED: 228 size = sizeof(u16) * rx * tx; 229 break; 230 default: 231 size = 0; 232 } 233 234 return size; 235 } 236 237 static int rmi_f54_get_pixel_fmt(enum rmi_f54_report_type reptype, u32 *pixfmt) 238 { 239 int ret = 0; 240 241 switch (reptype) { 242 case F54_8BIT_IMAGE: 243 *pixfmt = V4L2_TCH_FMT_DELTA_TD08; 244 break; 245 246 case F54_16BIT_IMAGE: 247 *pixfmt = V4L2_TCH_FMT_DELTA_TD16; 248 break; 249 250 case F54_RAW_16BIT_IMAGE: 251 case F54_TRUE_BASELINE: 252 case F54_FULL_RAW_CAP: 253 case F54_FULL_RAW_CAP_RX_OFFSET_REMOVED: 254 *pixfmt = V4L2_TCH_FMT_TU16; 255 break; 256 257 case F54_REPORT_NONE: 258 case F54_MAX_REPORT_TYPE: 259 ret = -EINVAL; 260 break; 261 } 262 263 return ret; 264 } 265 266 static const struct v4l2_file_operations rmi_f54_video_fops = { 267 .owner = THIS_MODULE, 268 .open = v4l2_fh_open, 269 .release = vb2_fop_release, 270 .unlocked_ioctl = video_ioctl2, 271 .read = vb2_fop_read, 272 .mmap = vb2_fop_mmap, 273 .poll = vb2_fop_poll, 274 }; 275 276 static int rmi_f54_queue_setup(struct vb2_queue *q, unsigned int *nbuffers, 277 unsigned int *nplanes, unsigned int sizes[], 278 struct device *alloc_devs[]) 279 { 280 struct f54_data *f54 = q->drv_priv; 281 282 if (*nplanes) 283 return sizes[0] < rmi_f54_get_report_size(f54) ? -EINVAL : 0; 284 285 *nplanes = 1; 286 sizes[0] = rmi_f54_get_report_size(f54); 287 288 return 0; 289 } 290 291 static void rmi_f54_buffer_queue(struct vb2_buffer *vb) 292 { 293 struct f54_data *f54 = vb2_get_drv_priv(vb->vb2_queue); 294 u16 *ptr; 295 enum vb2_buffer_state state; 296 enum rmi_f54_report_type reptype; 297 int ret; 298 299 mutex_lock(&f54->status_mutex); 300 301 reptype = rmi_f54_get_reptype(f54, f54->input); 302 if (reptype == F54_REPORT_NONE) { 303 state = VB2_BUF_STATE_ERROR; 304 goto done; 305 } 306 307 if (f54->is_busy) { 308 state = VB2_BUF_STATE_ERROR; 309 goto done; 310 } 311 312 ret = rmi_f54_request_report(f54->fn, reptype); 313 if (ret) { 314 dev_err(&f54->fn->dev, "Error requesting F54 report\n"); 315 state = VB2_BUF_STATE_ERROR; 316 goto done; 317 } 318 319 /* get frame data */ 320 mutex_lock(&f54->data_mutex); 321 322 while (f54->is_busy) { 323 mutex_unlock(&f54->data_mutex); 324 if (!wait_for_completion_timeout(&f54->cmd_done, 325 msecs_to_jiffies(1000))) { 326 dev_err(&f54->fn->dev, "Timed out\n"); 327 state = VB2_BUF_STATE_ERROR; 328 goto done; 329 } 330 mutex_lock(&f54->data_mutex); 331 } 332 333 ptr = vb2_plane_vaddr(vb, 0); 334 if (!ptr) { 335 dev_err(&f54->fn->dev, "Error acquiring frame ptr\n"); 336 state = VB2_BUF_STATE_ERROR; 337 goto data_done; 338 } 339 340 memcpy(ptr, f54->report_data, f54->report_size); 341 vb2_set_plane_payload(vb, 0, rmi_f54_get_report_size(f54)); 342 state = VB2_BUF_STATE_DONE; 343 344 data_done: 345 mutex_unlock(&f54->data_mutex); 346 done: 347 vb2_buffer_done(vb, state); 348 mutex_unlock(&f54->status_mutex); 349 } 350 351 /* V4L2 structures */ 352 static const struct vb2_ops rmi_f54_queue_ops = { 353 .queue_setup = rmi_f54_queue_setup, 354 .buf_queue = rmi_f54_buffer_queue, 355 .wait_prepare = vb2_ops_wait_prepare, 356 .wait_finish = vb2_ops_wait_finish, 357 }; 358 359 static const struct vb2_queue rmi_f54_queue = { 360 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, 361 .io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ, 362 .buf_struct_size = sizeof(struct vb2_buffer), 363 .ops = &rmi_f54_queue_ops, 364 .mem_ops = &vb2_vmalloc_memops, 365 .timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC, 366 .min_buffers_needed = 1, 367 }; 368 369 static int rmi_f54_vidioc_querycap(struct file *file, void *priv, 370 struct v4l2_capability *cap) 371 { 372 struct f54_data *f54 = video_drvdata(file); 373 374 strlcpy(cap->driver, F54_NAME, sizeof(cap->driver)); 375 strlcpy(cap->card, SYNAPTICS_INPUT_DEVICE_NAME, sizeof(cap->card)); 376 snprintf(cap->bus_info, sizeof(cap->bus_info), 377 "rmi4:%s", dev_name(&f54->fn->dev)); 378 379 return 0; 380 } 381 382 static int rmi_f54_vidioc_enum_input(struct file *file, void *priv, 383 struct v4l2_input *i) 384 { 385 struct f54_data *f54 = video_drvdata(file); 386 enum rmi_f54_report_type reptype; 387 388 reptype = rmi_f54_get_reptype(f54, i->index); 389 if (reptype == F54_REPORT_NONE) 390 return -EINVAL; 391 392 i->type = V4L2_INPUT_TYPE_TOUCH; 393 394 strlcpy(i->name, rmi_f54_report_type_names[reptype], sizeof(i->name)); 395 return 0; 396 } 397 398 static int rmi_f54_set_input(struct f54_data *f54, unsigned int i) 399 { 400 struct rmi_device *rmi_dev = f54->fn->rmi_dev; 401 struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev); 402 u8 rx = drv_data->num_rx_electrodes ? : f54->num_rx_electrodes; 403 u8 tx = drv_data->num_tx_electrodes ? : f54->num_tx_electrodes; 404 struct v4l2_pix_format *f = &f54->format; 405 enum rmi_f54_report_type reptype; 406 int ret; 407 408 reptype = rmi_f54_get_reptype(f54, i); 409 if (reptype == F54_REPORT_NONE) 410 return -EINVAL; 411 412 ret = rmi_f54_get_pixel_fmt(reptype, &f->pixelformat); 413 if (ret) 414 return ret; 415 416 f54->input = i; 417 418 f->width = rx; 419 f->height = tx; 420 f->field = V4L2_FIELD_NONE; 421 f->colorspace = V4L2_COLORSPACE_RAW; 422 f->bytesperline = f->width * sizeof(u16); 423 f->sizeimage = f->width * f->height * sizeof(u16); 424 425 return 0; 426 } 427 428 static int rmi_f54_vidioc_s_input(struct file *file, void *priv, unsigned int i) 429 { 430 return rmi_f54_set_input(video_drvdata(file), i); 431 } 432 433 static int rmi_f54_vidioc_g_input(struct file *file, void *priv, 434 unsigned int *i) 435 { 436 struct f54_data *f54 = video_drvdata(file); 437 438 *i = f54->input; 439 440 return 0; 441 } 442 443 static int rmi_f54_vidioc_fmt(struct file *file, void *priv, 444 struct v4l2_format *f) 445 { 446 struct f54_data *f54 = video_drvdata(file); 447 448 f->fmt.pix = f54->format; 449 450 return 0; 451 } 452 453 static int rmi_f54_vidioc_enum_fmt(struct file *file, void *priv, 454 struct v4l2_fmtdesc *fmt) 455 { 456 struct f54_data *f54 = video_drvdata(file); 457 458 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 459 return -EINVAL; 460 461 if (fmt->index) 462 return -EINVAL; 463 464 fmt->pixelformat = f54->format.pixelformat; 465 466 return 0; 467 } 468 469 static int rmi_f54_vidioc_g_parm(struct file *file, void *fh, 470 struct v4l2_streamparm *a) 471 { 472 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 473 return -EINVAL; 474 475 a->parm.capture.readbuffers = 1; 476 a->parm.capture.timeperframe.numerator = 1; 477 a->parm.capture.timeperframe.denominator = 10; 478 return 0; 479 } 480 481 static const struct v4l2_ioctl_ops rmi_f54_video_ioctl_ops = { 482 .vidioc_querycap = rmi_f54_vidioc_querycap, 483 484 .vidioc_enum_fmt_vid_cap = rmi_f54_vidioc_enum_fmt, 485 .vidioc_s_fmt_vid_cap = rmi_f54_vidioc_fmt, 486 .vidioc_g_fmt_vid_cap = rmi_f54_vidioc_fmt, 487 .vidioc_try_fmt_vid_cap = rmi_f54_vidioc_fmt, 488 .vidioc_g_parm = rmi_f54_vidioc_g_parm, 489 490 .vidioc_enum_input = rmi_f54_vidioc_enum_input, 491 .vidioc_g_input = rmi_f54_vidioc_g_input, 492 .vidioc_s_input = rmi_f54_vidioc_s_input, 493 494 .vidioc_reqbufs = vb2_ioctl_reqbufs, 495 .vidioc_create_bufs = vb2_ioctl_create_bufs, 496 .vidioc_querybuf = vb2_ioctl_querybuf, 497 .vidioc_qbuf = vb2_ioctl_qbuf, 498 .vidioc_dqbuf = vb2_ioctl_dqbuf, 499 .vidioc_expbuf = vb2_ioctl_expbuf, 500 501 .vidioc_streamon = vb2_ioctl_streamon, 502 .vidioc_streamoff = vb2_ioctl_streamoff, 503 }; 504 505 static const struct video_device rmi_f54_video_device = { 506 .name = "Synaptics RMI4", 507 .fops = &rmi_f54_video_fops, 508 .ioctl_ops = &rmi_f54_video_ioctl_ops, 509 .release = video_device_release_empty, 510 .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH | 511 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING, 512 }; 513 514 static void rmi_f54_work(struct work_struct *work) 515 { 516 struct f54_data *f54 = container_of(work, struct f54_data, work.work); 517 struct rmi_function *fn = f54->fn; 518 u8 fifo[2]; 519 struct rmi_f54_reports *report; 520 int report_size; 521 u8 command; 522 u8 *data; 523 int error; 524 525 data = f54->report_data; 526 report_size = rmi_f54_get_report_size(f54); 527 if (report_size == 0) { 528 dev_err(&fn->dev, "Bad report size, report type=%d\n", 529 f54->report_type); 530 error = -EINVAL; 531 goto error; /* retry won't help */ 532 } 533 f54->standard_report[0].size = report_size; 534 report = f54->standard_report; 535 536 mutex_lock(&f54->data_mutex); 537 538 /* 539 * Need to check if command has completed. 540 * If not try again later. 541 */ 542 error = rmi_read(fn->rmi_dev, f54->fn->fd.command_base_addr, 543 &command); 544 if (error) { 545 dev_err(&fn->dev, "Failed to read back command\n"); 546 goto error; 547 } 548 if (command & F54_GET_REPORT) { 549 if (time_after(jiffies, f54->timeout)) { 550 dev_err(&fn->dev, "Get report command timed out\n"); 551 error = -ETIMEDOUT; 552 } 553 report_size = 0; 554 goto error; 555 } 556 557 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "Get report command completed, reading data\n"); 558 559 report_size = 0; 560 for (; report->size; report++) { 561 fifo[0] = report->start & 0xff; 562 fifo[1] = (report->start >> 8) & 0xff; 563 error = rmi_write_block(fn->rmi_dev, 564 fn->fd.data_base_addr + F54_FIFO_OFFSET, 565 fifo, sizeof(fifo)); 566 if (error) { 567 dev_err(&fn->dev, "Failed to set fifo start offset\n"); 568 goto abort; 569 } 570 571 error = rmi_read_block(fn->rmi_dev, fn->fd.data_base_addr + 572 F54_REPORT_DATA_OFFSET, data, 573 report->size); 574 if (error) { 575 dev_err(&fn->dev, "%s: read [%d bytes] returned %d\n", 576 __func__, report->size, error); 577 goto abort; 578 } 579 data += report->size; 580 report_size += report->size; 581 } 582 583 abort: 584 f54->report_size = error ? 0 : report_size; 585 error: 586 if (error) 587 report_size = 0; 588 589 if (report_size == 0 && !error) { 590 queue_delayed_work(f54->workqueue, &f54->work, 591 msecs_to_jiffies(1)); 592 } else { 593 f54->is_busy = false; 594 complete(&f54->cmd_done); 595 } 596 597 mutex_unlock(&f54->data_mutex); 598 } 599 600 static int rmi_f54_config(struct rmi_function *fn) 601 { 602 struct rmi_driver *drv = fn->rmi_dev->driver; 603 604 drv->set_irq_bits(fn->rmi_dev, fn->irq_mask); 605 606 return 0; 607 } 608 609 static int rmi_f54_detect(struct rmi_function *fn) 610 { 611 int error; 612 struct f54_data *f54; 613 u8 buf[6]; 614 615 f54 = dev_get_drvdata(&fn->dev); 616 617 error = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr, 618 buf, sizeof(buf)); 619 if (error) { 620 dev_err(&fn->dev, "%s: Failed to query F54 properties\n", 621 __func__); 622 return error; 623 } 624 625 f54->num_rx_electrodes = buf[0]; 626 f54->num_tx_electrodes = buf[1]; 627 f54->capabilities = buf[2]; 628 f54->clock_rate = buf[3] | (buf[4] << 8); 629 f54->family = buf[5]; 630 631 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F54 num_rx_electrodes: %d\n", 632 f54->num_rx_electrodes); 633 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F54 num_tx_electrodes: %d\n", 634 f54->num_tx_electrodes); 635 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F54 capabilities: 0x%x\n", 636 f54->capabilities); 637 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F54 clock rate: 0x%x\n", 638 f54->clock_rate); 639 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F54 family: 0x%x\n", 640 f54->family); 641 642 f54->is_busy = false; 643 644 return 0; 645 } 646 647 static int rmi_f54_probe(struct rmi_function *fn) 648 { 649 struct f54_data *f54; 650 int ret; 651 u8 rx, tx; 652 653 f54 = devm_kzalloc(&fn->dev, sizeof(struct f54_data), GFP_KERNEL); 654 if (!f54) 655 return -ENOMEM; 656 657 f54->fn = fn; 658 dev_set_drvdata(&fn->dev, f54); 659 660 ret = rmi_f54_detect(fn); 661 if (ret) 662 return ret; 663 664 mutex_init(&f54->data_mutex); 665 mutex_init(&f54->status_mutex); 666 667 rx = f54->num_rx_electrodes; 668 tx = f54->num_tx_electrodes; 669 f54->report_data = devm_kzalloc(&fn->dev, 670 array3_size(tx, rx, sizeof(u16)), 671 GFP_KERNEL); 672 if (f54->report_data == NULL) 673 return -ENOMEM; 674 675 INIT_DELAYED_WORK(&f54->work, rmi_f54_work); 676 677 f54->workqueue = create_singlethread_workqueue("rmi4-poller"); 678 if (!f54->workqueue) 679 return -ENOMEM; 680 681 rmi_f54_create_input_map(f54); 682 rmi_f54_set_input(f54, 0); 683 684 /* register video device */ 685 strlcpy(f54->v4l2.name, F54_NAME, sizeof(f54->v4l2.name)); 686 ret = v4l2_device_register(&fn->dev, &f54->v4l2); 687 if (ret) { 688 dev_err(&fn->dev, "Unable to register video dev.\n"); 689 goto remove_wq; 690 } 691 692 /* initialize the queue */ 693 mutex_init(&f54->lock); 694 f54->queue = rmi_f54_queue; 695 f54->queue.drv_priv = f54; 696 f54->queue.lock = &f54->lock; 697 f54->queue.dev = &fn->dev; 698 699 ret = vb2_queue_init(&f54->queue); 700 if (ret) 701 goto remove_v4l2; 702 703 f54->vdev = rmi_f54_video_device; 704 f54->vdev.v4l2_dev = &f54->v4l2; 705 f54->vdev.lock = &f54->lock; 706 f54->vdev.vfl_dir = VFL_DIR_RX; 707 f54->vdev.queue = &f54->queue; 708 video_set_drvdata(&f54->vdev, f54); 709 710 ret = video_register_device(&f54->vdev, VFL_TYPE_TOUCH, -1); 711 if (ret) { 712 dev_err(&fn->dev, "Unable to register video subdevice."); 713 goto remove_v4l2; 714 } 715 716 return 0; 717 718 remove_v4l2: 719 v4l2_device_unregister(&f54->v4l2); 720 remove_wq: 721 cancel_delayed_work_sync(&f54->work); 722 flush_workqueue(f54->workqueue); 723 destroy_workqueue(f54->workqueue); 724 return ret; 725 } 726 727 static void rmi_f54_remove(struct rmi_function *fn) 728 { 729 struct f54_data *f54 = dev_get_drvdata(&fn->dev); 730 731 video_unregister_device(&f54->vdev); 732 v4l2_device_unregister(&f54->v4l2); 733 } 734 735 struct rmi_function_handler rmi_f54_handler = { 736 .driver = { 737 .name = F54_NAME, 738 }, 739 .func = 0x54, 740 .probe = rmi_f54_probe, 741 .config = rmi_f54_config, 742 .remove = rmi_f54_remove, 743 }; 744