1 /* 2 * Copyright (c) 2012-2015 Synaptics Incorporated 3 * Copyright (C) 2016 Zodiac Inflight Innovations 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 as published by 7 * the Free Software Foundation. 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/rmi.h> 12 #include <linux/input.h> 13 #include <linux/slab.h> 14 #include <linux/delay.h> 15 #include <linux/i2c.h> 16 #include <media/v4l2-device.h> 17 #include <media/v4l2-ioctl.h> 18 #include <media/videobuf2-v4l2.h> 19 #include <media/videobuf2-vmalloc.h> 20 #include "rmi_driver.h" 21 22 #define F54_NAME "rmi4_f54" 23 24 /* F54 data offsets */ 25 #define F54_REPORT_DATA_OFFSET 3 26 #define F54_FIFO_OFFSET 1 27 #define F54_NUM_TX_OFFSET 1 28 #define F54_NUM_RX_OFFSET 0 29 30 /* F54 commands */ 31 #define F54_GET_REPORT 1 32 #define F54_FORCE_CAL 2 33 34 /* Fixed sizes of reports */ 35 #define F54_QUERY_LEN 27 36 37 /* F54 capabilities */ 38 #define F54_CAP_BASELINE (1 << 2) 39 #define F54_CAP_IMAGE8 (1 << 3) 40 #define F54_CAP_IMAGE16 (1 << 6) 41 42 /** 43 * enum rmi_f54_report_type - RMI4 F54 report types 44 * 45 * @F54_8BIT_IMAGE: Normalized 8-Bit Image Report. The capacitance variance 46 * from baseline for each pixel. 47 * 48 * @F54_16BIT_IMAGE: Normalized 16-Bit Image Report. The capacitance variance 49 * from baseline for each pixel. 50 * 51 * @F54_RAW_16BIT_IMAGE: 52 * Raw 16-Bit Image Report. The raw capacitance for each 53 * pixel. 54 * 55 * @F54_TRUE_BASELINE: True Baseline Report. The baseline capacitance for each 56 * pixel. 57 * 58 * @F54_FULL_RAW_CAP: Full Raw Capacitance Report. The raw capacitance with 59 * low reference set to its minimum value and high 60 * reference set to its maximum value. 61 * 62 * @F54_FULL_RAW_CAP_RX_OFFSET_REMOVED: 63 * Full Raw Capacitance with Receiver Offset Removed 64 * Report. Set Low reference to its minimum value and high 65 * references to its maximum value, then report the raw 66 * capacitance for each pixel. 67 */ 68 enum rmi_f54_report_type { 69 F54_REPORT_NONE = 0, 70 F54_8BIT_IMAGE = 1, 71 F54_16BIT_IMAGE = 2, 72 F54_RAW_16BIT_IMAGE = 3, 73 F54_TRUE_BASELINE = 9, 74 F54_FULL_RAW_CAP = 19, 75 F54_FULL_RAW_CAP_RX_OFFSET_REMOVED = 20, 76 F54_MAX_REPORT_TYPE, 77 }; 78 79 const char *rmi_f54_report_type_names[] = { 80 [F54_REPORT_NONE] = "Unknown", 81 [F54_8BIT_IMAGE] = "Normalized 8-Bit Image", 82 [F54_16BIT_IMAGE] = "Normalized 16-Bit Image", 83 [F54_RAW_16BIT_IMAGE] = "Raw 16-Bit Image", 84 [F54_TRUE_BASELINE] = "True Baseline", 85 [F54_FULL_RAW_CAP] = "Full Raw Capacitance", 86 [F54_FULL_RAW_CAP_RX_OFFSET_REMOVED] 87 = "Full Raw Capacitance RX Offset Removed", 88 }; 89 90 struct rmi_f54_reports { 91 int start; 92 int size; 93 }; 94 95 struct f54_data { 96 struct rmi_function *fn; 97 98 u8 qry[F54_QUERY_LEN]; 99 u8 num_rx_electrodes; 100 u8 num_tx_electrodes; 101 u8 capabilities; 102 u16 clock_rate; 103 u8 family; 104 105 enum rmi_f54_report_type report_type; 106 u8 *report_data; 107 int report_size; 108 struct rmi_f54_reports standard_report[2]; 109 110 bool is_busy; 111 struct mutex status_mutex; 112 struct mutex data_mutex; 113 114 struct workqueue_struct *workqueue; 115 struct delayed_work work; 116 unsigned long timeout; 117 118 struct completion cmd_done; 119 120 /* V4L2 support */ 121 struct v4l2_device v4l2; 122 struct v4l2_pix_format format; 123 struct video_device vdev; 124 struct vb2_queue queue; 125 struct mutex lock; 126 int input; 127 enum rmi_f54_report_type inputs[F54_MAX_REPORT_TYPE]; 128 }; 129 130 /* 131 * Basic checks on report_type to ensure we write a valid type 132 * to the sensor. 133 */ 134 static bool is_f54_report_type_valid(struct f54_data *f54, 135 enum rmi_f54_report_type reptype) 136 { 137 switch (reptype) { 138 case F54_8BIT_IMAGE: 139 return f54->capabilities & F54_CAP_IMAGE8; 140 case F54_16BIT_IMAGE: 141 case F54_RAW_16BIT_IMAGE: 142 return f54->capabilities & F54_CAP_IMAGE16; 143 case F54_TRUE_BASELINE: 144 return f54->capabilities & F54_CAP_IMAGE16; 145 case F54_FULL_RAW_CAP: 146 case F54_FULL_RAW_CAP_RX_OFFSET_REMOVED: 147 return true; 148 default: 149 return false; 150 } 151 } 152 153 static enum rmi_f54_report_type rmi_f54_get_reptype(struct f54_data *f54, 154 unsigned int i) 155 { 156 if (i >= F54_MAX_REPORT_TYPE) 157 return F54_REPORT_NONE; 158 159 return f54->inputs[i]; 160 } 161 162 static void rmi_f54_create_input_map(struct f54_data *f54) 163 { 164 int i = 0; 165 enum rmi_f54_report_type reptype; 166 167 for (reptype = 1; reptype < F54_MAX_REPORT_TYPE; reptype++) { 168 if (!is_f54_report_type_valid(f54, reptype)) 169 continue; 170 171 f54->inputs[i++] = reptype; 172 } 173 174 /* Remaining values are zero via kzalloc */ 175 } 176 177 static int rmi_f54_request_report(struct rmi_function *fn, u8 report_type) 178 { 179 struct f54_data *f54 = dev_get_drvdata(&fn->dev); 180 struct rmi_device *rmi_dev = fn->rmi_dev; 181 int error; 182 183 /* Write Report Type into F54_AD_Data0 */ 184 if (f54->report_type != report_type) { 185 error = rmi_write(rmi_dev, f54->fn->fd.data_base_addr, 186 report_type); 187 if (error) 188 return error; 189 f54->report_type = report_type; 190 } 191 192 /* 193 * Small delay after disabling interrupts to avoid race condition 194 * in firmare. This value is a bit higher than absolutely necessary. 195 * Should be removed once issue is resolved in firmware. 196 */ 197 usleep_range(2000, 3000); 198 199 mutex_lock(&f54->data_mutex); 200 201 error = rmi_write(rmi_dev, fn->fd.command_base_addr, F54_GET_REPORT); 202 if (error < 0) 203 return error; 204 205 init_completion(&f54->cmd_done); 206 207 f54->is_busy = 1; 208 f54->timeout = jiffies + msecs_to_jiffies(100); 209 210 queue_delayed_work(f54->workqueue, &f54->work, 0); 211 212 mutex_unlock(&f54->data_mutex); 213 214 return 0; 215 } 216 217 static size_t rmi_f54_get_report_size(struct f54_data *f54) 218 { 219 u8 rx = f54->num_rx_electrodes ? : f54->num_rx_electrodes; 220 u8 tx = f54->num_tx_electrodes ? : f54->num_tx_electrodes; 221 size_t size; 222 223 switch (rmi_f54_get_reptype(f54, f54->input)) { 224 case F54_8BIT_IMAGE: 225 size = rx * tx; 226 break; 227 case F54_16BIT_IMAGE: 228 case F54_RAW_16BIT_IMAGE: 229 case F54_TRUE_BASELINE: 230 case F54_FULL_RAW_CAP: 231 case F54_FULL_RAW_CAP_RX_OFFSET_REMOVED: 232 size = sizeof(u16) * rx * tx; 233 break; 234 default: 235 size = 0; 236 } 237 238 return size; 239 } 240 241 static int rmi_f54_get_pixel_fmt(enum rmi_f54_report_type reptype, u32 *pixfmt) 242 { 243 int ret = 0; 244 245 switch (reptype) { 246 case F54_8BIT_IMAGE: 247 *pixfmt = V4L2_TCH_FMT_DELTA_TD08; 248 break; 249 250 case F54_16BIT_IMAGE: 251 *pixfmt = V4L2_TCH_FMT_DELTA_TD16; 252 break; 253 254 case F54_RAW_16BIT_IMAGE: 255 case F54_TRUE_BASELINE: 256 case F54_FULL_RAW_CAP: 257 case F54_FULL_RAW_CAP_RX_OFFSET_REMOVED: 258 *pixfmt = V4L2_TCH_FMT_TU16; 259 break; 260 261 case F54_REPORT_NONE: 262 case F54_MAX_REPORT_TYPE: 263 ret = -EINVAL; 264 break; 265 } 266 267 return ret; 268 } 269 270 static const struct v4l2_file_operations rmi_f54_video_fops = { 271 .owner = THIS_MODULE, 272 .open = v4l2_fh_open, 273 .release = vb2_fop_release, 274 .unlocked_ioctl = video_ioctl2, 275 .read = vb2_fop_read, 276 .mmap = vb2_fop_mmap, 277 .poll = vb2_fop_poll, 278 }; 279 280 static int rmi_f54_queue_setup(struct vb2_queue *q, unsigned int *nbuffers, 281 unsigned int *nplanes, unsigned int sizes[], 282 struct device *alloc_devs[]) 283 { 284 struct f54_data *f54 = q->drv_priv; 285 286 if (*nplanes) 287 return sizes[0] < rmi_f54_get_report_size(f54) ? -EINVAL : 0; 288 289 *nplanes = 1; 290 sizes[0] = rmi_f54_get_report_size(f54); 291 292 return 0; 293 } 294 295 static void rmi_f54_buffer_queue(struct vb2_buffer *vb) 296 { 297 struct f54_data *f54 = vb2_get_drv_priv(vb->vb2_queue); 298 u16 *ptr; 299 enum vb2_buffer_state state; 300 enum rmi_f54_report_type reptype; 301 int ret; 302 303 mutex_lock(&f54->status_mutex); 304 305 reptype = rmi_f54_get_reptype(f54, f54->input); 306 if (reptype == F54_REPORT_NONE) { 307 state = VB2_BUF_STATE_ERROR; 308 goto done; 309 } 310 311 if (f54->is_busy) { 312 state = VB2_BUF_STATE_ERROR; 313 goto done; 314 } 315 316 ret = rmi_f54_request_report(f54->fn, reptype); 317 if (ret) { 318 dev_err(&f54->fn->dev, "Error requesting F54 report\n"); 319 state = VB2_BUF_STATE_ERROR; 320 goto done; 321 } 322 323 /* get frame data */ 324 mutex_lock(&f54->data_mutex); 325 326 while (f54->is_busy) { 327 mutex_unlock(&f54->data_mutex); 328 if (!wait_for_completion_timeout(&f54->cmd_done, 329 msecs_to_jiffies(1000))) { 330 dev_err(&f54->fn->dev, "Timed out\n"); 331 state = VB2_BUF_STATE_ERROR; 332 goto done; 333 } 334 mutex_lock(&f54->data_mutex); 335 } 336 337 ptr = vb2_plane_vaddr(vb, 0); 338 if (!ptr) { 339 dev_err(&f54->fn->dev, "Error acquiring frame ptr\n"); 340 state = VB2_BUF_STATE_ERROR; 341 goto data_done; 342 } 343 344 memcpy(ptr, f54->report_data, f54->report_size); 345 vb2_set_plane_payload(vb, 0, rmi_f54_get_report_size(f54)); 346 state = VB2_BUF_STATE_DONE; 347 348 data_done: 349 mutex_unlock(&f54->data_mutex); 350 done: 351 vb2_buffer_done(vb, state); 352 mutex_unlock(&f54->status_mutex); 353 } 354 355 /* V4L2 structures */ 356 static const struct vb2_ops rmi_f54_queue_ops = { 357 .queue_setup = rmi_f54_queue_setup, 358 .buf_queue = rmi_f54_buffer_queue, 359 .wait_prepare = vb2_ops_wait_prepare, 360 .wait_finish = vb2_ops_wait_finish, 361 }; 362 363 static const struct vb2_queue rmi_f54_queue = { 364 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, 365 .io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ, 366 .buf_struct_size = sizeof(struct vb2_buffer), 367 .ops = &rmi_f54_queue_ops, 368 .mem_ops = &vb2_vmalloc_memops, 369 .timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC, 370 .min_buffers_needed = 1, 371 }; 372 373 static int rmi_f54_vidioc_querycap(struct file *file, void *priv, 374 struct v4l2_capability *cap) 375 { 376 struct f54_data *f54 = video_drvdata(file); 377 378 strlcpy(cap->driver, F54_NAME, sizeof(cap->driver)); 379 strlcpy(cap->card, SYNAPTICS_INPUT_DEVICE_NAME, sizeof(cap->card)); 380 snprintf(cap->bus_info, sizeof(cap->bus_info), 381 "rmi4:%s", dev_name(&f54->fn->dev)); 382 383 return 0; 384 } 385 386 static int rmi_f54_vidioc_enum_input(struct file *file, void *priv, 387 struct v4l2_input *i) 388 { 389 struct f54_data *f54 = video_drvdata(file); 390 enum rmi_f54_report_type reptype; 391 392 reptype = rmi_f54_get_reptype(f54, i->index); 393 if (reptype == F54_REPORT_NONE) 394 return -EINVAL; 395 396 i->type = V4L2_INPUT_TYPE_TOUCH; 397 398 strlcpy(i->name, rmi_f54_report_type_names[reptype], sizeof(i->name)); 399 return 0; 400 } 401 402 static int rmi_f54_set_input(struct f54_data *f54, unsigned int i) 403 { 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 = f54->num_rx_electrodes; 419 f->height = f54->num_tx_electrodes; 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 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 457 return -EINVAL; 458 459 switch (fmt->index) { 460 case 0: 461 fmt->pixelformat = V4L2_TCH_FMT_DELTA_TD16; 462 break; 463 464 case 1: 465 fmt->pixelformat = V4L2_TCH_FMT_DELTA_TD08; 466 break; 467 468 case 2: 469 fmt->pixelformat = V4L2_TCH_FMT_TU16; 470 break; 471 472 default: 473 return -EINVAL; 474 } 475 476 return 0; 477 } 478 479 static int rmi_f54_vidioc_g_parm(struct file *file, void *fh, 480 struct v4l2_streamparm *a) 481 { 482 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 483 return -EINVAL; 484 485 a->parm.capture.readbuffers = 1; 486 a->parm.capture.timeperframe.numerator = 1; 487 a->parm.capture.timeperframe.denominator = 10; 488 return 0; 489 } 490 491 static const struct v4l2_ioctl_ops rmi_f54_video_ioctl_ops = { 492 .vidioc_querycap = rmi_f54_vidioc_querycap, 493 494 .vidioc_enum_fmt_vid_cap = rmi_f54_vidioc_enum_fmt, 495 .vidioc_s_fmt_vid_cap = rmi_f54_vidioc_fmt, 496 .vidioc_g_fmt_vid_cap = rmi_f54_vidioc_fmt, 497 .vidioc_try_fmt_vid_cap = rmi_f54_vidioc_fmt, 498 .vidioc_g_parm = rmi_f54_vidioc_g_parm, 499 500 .vidioc_enum_input = rmi_f54_vidioc_enum_input, 501 .vidioc_g_input = rmi_f54_vidioc_g_input, 502 .vidioc_s_input = rmi_f54_vidioc_s_input, 503 504 .vidioc_reqbufs = vb2_ioctl_reqbufs, 505 .vidioc_create_bufs = vb2_ioctl_create_bufs, 506 .vidioc_querybuf = vb2_ioctl_querybuf, 507 .vidioc_qbuf = vb2_ioctl_qbuf, 508 .vidioc_dqbuf = vb2_ioctl_dqbuf, 509 .vidioc_expbuf = vb2_ioctl_expbuf, 510 511 .vidioc_streamon = vb2_ioctl_streamon, 512 .vidioc_streamoff = vb2_ioctl_streamoff, 513 }; 514 515 static const struct video_device rmi_f54_video_device = { 516 .name = "Synaptics RMI4", 517 .fops = &rmi_f54_video_fops, 518 .ioctl_ops = &rmi_f54_video_ioctl_ops, 519 .release = video_device_release_empty, 520 .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH | 521 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING, 522 }; 523 524 static void rmi_f54_work(struct work_struct *work) 525 { 526 struct f54_data *f54 = container_of(work, struct f54_data, work.work); 527 struct rmi_function *fn = f54->fn; 528 u8 fifo[2]; 529 struct rmi_f54_reports *report; 530 int report_size; 531 u8 command; 532 u8 *data; 533 int error; 534 535 data = f54->report_data; 536 report_size = rmi_f54_get_report_size(f54); 537 if (report_size == 0) { 538 dev_err(&fn->dev, "Bad report size, report type=%d\n", 539 f54->report_type); 540 error = -EINVAL; 541 goto error; /* retry won't help */ 542 } 543 f54->standard_report[0].size = report_size; 544 report = f54->standard_report; 545 546 mutex_lock(&f54->data_mutex); 547 548 /* 549 * Need to check if command has completed. 550 * If not try again later. 551 */ 552 error = rmi_read(fn->rmi_dev, f54->fn->fd.command_base_addr, 553 &command); 554 if (error) { 555 dev_err(&fn->dev, "Failed to read back command\n"); 556 goto error; 557 } 558 if (command & F54_GET_REPORT) { 559 if (time_after(jiffies, f54->timeout)) { 560 dev_err(&fn->dev, "Get report command timed out\n"); 561 error = -ETIMEDOUT; 562 } 563 report_size = 0; 564 goto error; 565 } 566 567 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "Get report command completed, reading data\n"); 568 569 report_size = 0; 570 for (; report->size; report++) { 571 fifo[0] = report->start & 0xff; 572 fifo[1] = (report->start >> 8) & 0xff; 573 error = rmi_write_block(fn->rmi_dev, 574 fn->fd.data_base_addr + F54_FIFO_OFFSET, 575 fifo, sizeof(fifo)); 576 if (error) { 577 dev_err(&fn->dev, "Failed to set fifo start offset\n"); 578 goto abort; 579 } 580 581 error = rmi_read_block(fn->rmi_dev, fn->fd.data_base_addr + 582 F54_REPORT_DATA_OFFSET, data, 583 report->size); 584 if (error) { 585 dev_err(&fn->dev, "%s: read [%d bytes] returned %d\n", 586 __func__, report->size, error); 587 goto abort; 588 } 589 data += report->size; 590 report_size += report->size; 591 } 592 593 abort: 594 f54->report_size = error ? 0 : report_size; 595 error: 596 if (error) 597 report_size = 0; 598 599 if (report_size == 0 && !error) { 600 queue_delayed_work(f54->workqueue, &f54->work, 601 msecs_to_jiffies(1)); 602 } else { 603 f54->is_busy = false; 604 complete(&f54->cmd_done); 605 } 606 607 mutex_unlock(&f54->data_mutex); 608 } 609 610 static int rmi_f54_attention(struct rmi_function *fn, unsigned long *irqbits) 611 { 612 return 0; 613 } 614 615 static int rmi_f54_config(struct rmi_function *fn) 616 { 617 struct rmi_driver *drv = fn->rmi_dev->driver; 618 619 drv->set_irq_bits(fn->rmi_dev, fn->irq_mask); 620 621 return 0; 622 } 623 624 static int rmi_f54_detect(struct rmi_function *fn) 625 { 626 int error; 627 struct f54_data *f54; 628 629 f54 = dev_get_drvdata(&fn->dev); 630 631 error = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr, 632 &f54->qry, sizeof(f54->qry)); 633 if (error) { 634 dev_err(&fn->dev, "%s: Failed to query F54 properties\n", 635 __func__); 636 return error; 637 } 638 639 f54->num_rx_electrodes = f54->qry[0]; 640 f54->num_tx_electrodes = f54->qry[1]; 641 f54->capabilities = f54->qry[2]; 642 f54->clock_rate = f54->qry[3] | (f54->qry[4] << 8); 643 f54->family = f54->qry[5]; 644 645 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F54 num_rx_electrodes: %d\n", 646 f54->num_rx_electrodes); 647 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F54 num_tx_electrodes: %d\n", 648 f54->num_tx_electrodes); 649 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F54 capabilities: 0x%x\n", 650 f54->capabilities); 651 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F54 clock rate: 0x%x\n", 652 f54->clock_rate); 653 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F54 family: 0x%x\n", 654 f54->family); 655 656 f54->is_busy = false; 657 658 return 0; 659 } 660 661 static int rmi_f54_probe(struct rmi_function *fn) 662 { 663 struct f54_data *f54; 664 int ret; 665 u8 rx, tx; 666 667 f54 = devm_kzalloc(&fn->dev, sizeof(struct f54_data), GFP_KERNEL); 668 if (!f54) 669 return -ENOMEM; 670 671 f54->fn = fn; 672 dev_set_drvdata(&fn->dev, f54); 673 674 ret = rmi_f54_detect(fn); 675 if (ret) 676 return ret; 677 678 mutex_init(&f54->data_mutex); 679 mutex_init(&f54->status_mutex); 680 681 rx = f54->num_rx_electrodes; 682 tx = f54->num_tx_electrodes; 683 f54->report_data = devm_kzalloc(&fn->dev, 684 sizeof(u16) * tx * rx, 685 GFP_KERNEL); 686 if (f54->report_data == NULL) 687 return -ENOMEM; 688 689 INIT_DELAYED_WORK(&f54->work, rmi_f54_work); 690 691 f54->workqueue = create_singlethread_workqueue("rmi4-poller"); 692 if (!f54->workqueue) 693 return -ENOMEM; 694 695 rmi_f54_create_input_map(f54); 696 697 /* register video device */ 698 strlcpy(f54->v4l2.name, F54_NAME, sizeof(f54->v4l2.name)); 699 ret = v4l2_device_register(&fn->dev, &f54->v4l2); 700 if (ret) { 701 dev_err(&fn->dev, "Unable to register video dev.\n"); 702 goto remove_wq; 703 } 704 705 /* initialize the queue */ 706 mutex_init(&f54->lock); 707 f54->queue = rmi_f54_queue; 708 f54->queue.drv_priv = f54; 709 f54->queue.lock = &f54->lock; 710 f54->queue.dev = &fn->dev; 711 712 ret = vb2_queue_init(&f54->queue); 713 if (ret) 714 goto remove_v4l2; 715 716 f54->vdev = rmi_f54_video_device; 717 f54->vdev.v4l2_dev = &f54->v4l2; 718 f54->vdev.lock = &f54->lock; 719 f54->vdev.vfl_dir = VFL_DIR_RX; 720 f54->vdev.queue = &f54->queue; 721 video_set_drvdata(&f54->vdev, f54); 722 723 ret = video_register_device(&f54->vdev, VFL_TYPE_TOUCH, -1); 724 if (ret) { 725 dev_err(&fn->dev, "Unable to register video subdevice."); 726 goto remove_v4l2; 727 } 728 729 return 0; 730 731 remove_v4l2: 732 v4l2_device_unregister(&f54->v4l2); 733 remove_wq: 734 cancel_delayed_work_sync(&f54->work); 735 flush_workqueue(f54->workqueue); 736 destroy_workqueue(f54->workqueue); 737 return ret; 738 } 739 740 static void rmi_f54_remove(struct rmi_function *fn) 741 { 742 struct f54_data *f54 = dev_get_drvdata(&fn->dev); 743 744 video_unregister_device(&f54->vdev); 745 v4l2_device_unregister(&f54->v4l2); 746 } 747 748 struct rmi_function_handler rmi_f54_handler = { 749 .driver = { 750 .name = F54_NAME, 751 }, 752 .func = 0x54, 753 .probe = rmi_f54_probe, 754 .config = rmi_f54_config, 755 .attention = rmi_f54_attention, 756 .remove = rmi_f54_remove, 757 }; 758