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Merge tag 'for-linus-20190706' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / input / rmi4 / rmi_f54.c
blob710b025954860f7c3a8253668ead8068b65ca971
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 };
Linux with added FPC-III support