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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/*
28 * The smbus protocol can read only 32 bytes max at a time.
29 * But this should be fine for i2c/spi as well.
30 */
31#define F54_REPORT_DATA_SIZE 32
32
33/* F54 commands */
34#define F54_GET_REPORT 1
35#define F54_FORCE_CAL 2
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_REPORT_NONE: No Image Report.
46 *
47 * @F54_8BIT_IMAGE: Normalized 8-Bit Image Report. The capacitance variance
48 * from baseline for each pixel.
49 *
50 * @F54_16BIT_IMAGE: Normalized 16-Bit Image Report. The capacitance variance
51 * from baseline for each pixel.
52 *
53 * @F54_RAW_16BIT_IMAGE:
54 * Raw 16-Bit Image Report. The raw capacitance for each
55 * pixel.
56 *
57 * @F54_TRUE_BASELINE: True Baseline Report. The baseline capacitance for each
58 * pixel.
59 *
60 * @F54_FULL_RAW_CAP: Full Raw Capacitance Report. The raw capacitance with
61 * low reference set to its minimum value and high
62 * reference set to its maximum value.
63 *
64 * @F54_FULL_RAW_CAP_RX_OFFSET_REMOVED:
65 * Full Raw Capacitance with Receiver Offset Removed
66 * Report. Set Low reference to its minimum value and high
67 * references to its maximum value, then report the raw
68 * capacitance for each pixel.
69 *
70 * @F54_MAX_REPORT_TYPE:
71 * Maximum number of Report Types. Used for sanity
72 * checking.
73 */
74enum rmi_f54_report_type {
75 F54_REPORT_NONE = 0,
76 F54_8BIT_IMAGE = 1,
77 F54_16BIT_IMAGE = 2,
78 F54_RAW_16BIT_IMAGE = 3,
79 F54_TRUE_BASELINE = 9,
80 F54_FULL_RAW_CAP = 19,
81 F54_FULL_RAW_CAP_RX_OFFSET_REMOVED = 20,
82 F54_MAX_REPORT_TYPE,
83};
84
85static const char * const rmi_f54_report_type_names[] = {
86 [F54_REPORT_NONE] = "Unknown",
87 [F54_8BIT_IMAGE] = "Normalized 8-Bit Image",
88 [F54_16BIT_IMAGE] = "Normalized 16-Bit Image",
89 [F54_RAW_16BIT_IMAGE] = "Raw 16-Bit Image",
90 [F54_TRUE_BASELINE] = "True Baseline",
91 [F54_FULL_RAW_CAP] = "Full Raw Capacitance",
92 [F54_FULL_RAW_CAP_RX_OFFSET_REMOVED]
93 = "Full Raw Capacitance RX Offset Removed",
94};
95
96struct f54_data {
97 struct rmi_function *fn;
98
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
109 bool is_busy;
110 struct mutex status_mutex;
111 struct mutex data_mutex;
112
113 struct workqueue_struct *workqueue;
114 struct delayed_work work;
115 unsigned long timeout;
116
117 struct completion cmd_done;
118
119 /* V4L2 support */
120 struct v4l2_device v4l2;
121 struct v4l2_pix_format format;
122 struct video_device vdev;
123 struct vb2_queue queue;
124 struct mutex lock;
125 u32 sequence;
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 */
134static 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
153static 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
162static 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
177static 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 goto unlock;
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
212unlock:
213 mutex_unlock(&f54->data_mutex);
214
215 return error;
216}
217
218static size_t rmi_f54_get_report_size(struct f54_data *f54)
219{
220 struct rmi_device *rmi_dev = f54->fn->rmi_dev;
221 struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
222 u8 rx = drv_data->num_rx_electrodes ? : f54->num_rx_electrodes;
223 u8 tx = drv_data->num_tx_electrodes ? : f54->num_tx_electrodes;
224 size_t size;
225
226 switch (rmi_f54_get_reptype(f54, f54->input)) {
227 case F54_8BIT_IMAGE:
228 size = rx * tx;
229 break;
230 case F54_16BIT_IMAGE:
231 case F54_RAW_16BIT_IMAGE:
232 case F54_TRUE_BASELINE:
233 case F54_FULL_RAW_CAP:
234 case F54_FULL_RAW_CAP_RX_OFFSET_REMOVED:
235 size = sizeof(u16) * rx * tx;
236 break;
237 default:
238 size = 0;
239 }
240
241 return size;
242}
243
244static int rmi_f54_get_pixel_fmt(enum rmi_f54_report_type reptype, u32 *pixfmt)
245{
246 int ret = 0;
247
248 switch (reptype) {
249 case F54_8BIT_IMAGE:
250 *pixfmt = V4L2_TCH_FMT_DELTA_TD08;
251 break;
252
253 case F54_16BIT_IMAGE:
254 *pixfmt = V4L2_TCH_FMT_DELTA_TD16;
255 break;
256
257 case F54_RAW_16BIT_IMAGE:
258 case F54_TRUE_BASELINE:
259 case F54_FULL_RAW_CAP:
260 case F54_FULL_RAW_CAP_RX_OFFSET_REMOVED:
261 *pixfmt = V4L2_TCH_FMT_TU16;
262 break;
263
264 case F54_REPORT_NONE:
265 case F54_MAX_REPORT_TYPE:
266 ret = -EINVAL;
267 break;
268 }
269
270 return ret;
271}
272
273static const struct v4l2_file_operations rmi_f54_video_fops = {
274 .owner = THIS_MODULE,
275 .open = v4l2_fh_open,
276 .release = vb2_fop_release,
277 .unlocked_ioctl = video_ioctl2,
278 .read = vb2_fop_read,
279 .mmap = vb2_fop_mmap,
280 .poll = vb2_fop_poll,
281};
282
283static int rmi_f54_queue_setup(struct vb2_queue *q, unsigned int *nbuffers,
284 unsigned int *nplanes, unsigned int sizes[],
285 struct device *alloc_devs[])
286{
287 struct f54_data *f54 = q->drv_priv;
288
289 if (*nplanes)
290 return sizes[0] < rmi_f54_get_report_size(f54) ? -EINVAL : 0;
291
292 *nplanes = 1;
293 sizes[0] = rmi_f54_get_report_size(f54);
294
295 return 0;
296}
297
298static void rmi_f54_buffer_queue(struct vb2_buffer *vb)
299{
300 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
301 struct f54_data *f54 = vb2_get_drv_priv(vb->vb2_queue);
302 u16 *ptr;
303 enum vb2_buffer_state state;
304 enum rmi_f54_report_type reptype;
305 int ret;
306
307 mutex_lock(&f54->status_mutex);
308
309 vb2_set_plane_payload(vb, 0, 0);
310 reptype = rmi_f54_get_reptype(f54, f54->input);
311 if (reptype == F54_REPORT_NONE) {
312 state = VB2_BUF_STATE_ERROR;
313 goto done;
314 }
315
316 if (f54->is_busy) {
317 state = VB2_BUF_STATE_ERROR;
318 goto done;
319 }
320
321 ret = rmi_f54_request_report(f54->fn, reptype);
322 if (ret) {
323 dev_err(&f54->fn->dev, "Error requesting F54 report\n");
324 state = VB2_BUF_STATE_ERROR;
325 goto done;
326 }
327
328 /* get frame data */
329 mutex_lock(&f54->data_mutex);
330
331 while (f54->is_busy) {
332 mutex_unlock(&f54->data_mutex);
333 if (!wait_for_completion_timeout(&f54->cmd_done,
334 msecs_to_jiffies(1000))) {
335 dev_err(&f54->fn->dev, "Timed out\n");
336 state = VB2_BUF_STATE_ERROR;
337 goto done;
338 }
339 mutex_lock(&f54->data_mutex);
340 }
341
342 ptr = vb2_plane_vaddr(vb, 0);
343 if (!ptr) {
344 dev_err(&f54->fn->dev, "Error acquiring frame ptr\n");
345 state = VB2_BUF_STATE_ERROR;
346 goto data_done;
347 }
348
349 memcpy(ptr, f54->report_data, f54->report_size);
350 vb2_set_plane_payload(vb, 0, rmi_f54_get_report_size(f54));
351 state = VB2_BUF_STATE_DONE;
352
353data_done:
354 mutex_unlock(&f54->data_mutex);
355done:
356 vb->timestamp = ktime_get_ns();
357 vbuf->field = V4L2_FIELD_NONE;
358 vbuf->sequence = f54->sequence++;
359 vb2_buffer_done(vb, state);
360 mutex_unlock(&f54->status_mutex);
361}
362
363static void rmi_f54_stop_streaming(struct vb2_queue *q)
364{
365 struct f54_data *f54 = vb2_get_drv_priv(q);
366
367 f54->sequence = 0;
368}
369
370/* V4L2 structures */
371static const struct vb2_ops rmi_f54_queue_ops = {
372 .queue_setup = rmi_f54_queue_setup,
373 .buf_queue = rmi_f54_buffer_queue,
374 .stop_streaming = rmi_f54_stop_streaming,
375 .wait_prepare = vb2_ops_wait_prepare,
376 .wait_finish = vb2_ops_wait_finish,
377};
378
379static const struct vb2_queue rmi_f54_queue = {
380 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
381 .io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ,
382 .buf_struct_size = sizeof(struct vb2_v4l2_buffer),
383 .ops = &rmi_f54_queue_ops,
384 .mem_ops = &vb2_vmalloc_memops,
385 .timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC,
386};
387
388static int rmi_f54_vidioc_querycap(struct file *file, void *priv,
389 struct v4l2_capability *cap)
390{
391 struct f54_data *f54 = video_drvdata(file);
392
393 strscpy(cap->driver, F54_NAME, sizeof(cap->driver));
394 strscpy(cap->card, SYNAPTICS_INPUT_DEVICE_NAME, sizeof(cap->card));
395 snprintf(cap->bus_info, sizeof(cap->bus_info),
396 "rmi4:%s", dev_name(&f54->fn->dev));
397
398 return 0;
399}
400
401static int rmi_f54_vidioc_enum_input(struct file *file, void *priv,
402 struct v4l2_input *i)
403{
404 struct f54_data *f54 = video_drvdata(file);
405 enum rmi_f54_report_type reptype;
406
407 reptype = rmi_f54_get_reptype(f54, i->index);
408 if (reptype == F54_REPORT_NONE)
409 return -EINVAL;
410
411 i->type = V4L2_INPUT_TYPE_TOUCH;
412
413 strscpy(i->name, rmi_f54_report_type_names[reptype], sizeof(i->name));
414 return 0;
415}
416
417static int rmi_f54_set_input(struct f54_data *f54, unsigned int i)
418{
419 struct rmi_device *rmi_dev = f54->fn->rmi_dev;
420 struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
421 u8 rx = drv_data->num_rx_electrodes ? : f54->num_rx_electrodes;
422 u8 tx = drv_data->num_tx_electrodes ? : f54->num_tx_electrodes;
423 struct v4l2_pix_format *f = &f54->format;
424 enum rmi_f54_report_type reptype;
425 int ret;
426
427 reptype = rmi_f54_get_reptype(f54, i);
428 if (reptype == F54_REPORT_NONE)
429 return -EINVAL;
430
431 ret = rmi_f54_get_pixel_fmt(reptype, &f->pixelformat);
432 if (ret)
433 return ret;
434
435 f54->input = i;
436
437 f->width = rx;
438 f->height = tx;
439 f->field = V4L2_FIELD_NONE;
440 f->colorspace = V4L2_COLORSPACE_RAW;
441 f->bytesperline = f->width * sizeof(u16);
442 f->sizeimage = f->width * f->height * sizeof(u16);
443
444 return 0;
445}
446
447static int rmi_f54_vidioc_s_input(struct file *file, void *priv, unsigned int i)
448{
449 return rmi_f54_set_input(video_drvdata(file), i);
450}
451
452static int rmi_f54_vidioc_g_input(struct file *file, void *priv,
453 unsigned int *i)
454{
455 struct f54_data *f54 = video_drvdata(file);
456
457 *i = f54->input;
458
459 return 0;
460}
461
462static int rmi_f54_vidioc_fmt(struct file *file, void *priv,
463 struct v4l2_format *f)
464{
465 struct f54_data *f54 = video_drvdata(file);
466
467 f->fmt.pix = f54->format;
468
469 return 0;
470}
471
472static int rmi_f54_vidioc_enum_fmt(struct file *file, void *priv,
473 struct v4l2_fmtdesc *fmt)
474{
475 struct f54_data *f54 = video_drvdata(file);
476
477 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
478 return -EINVAL;
479
480 if (fmt->index)
481 return -EINVAL;
482
483 fmt->pixelformat = f54->format.pixelformat;
484
485 return 0;
486}
487
488static int rmi_f54_vidioc_g_parm(struct file *file, void *fh,
489 struct v4l2_streamparm *a)
490{
491 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
492 return -EINVAL;
493
494 a->parm.capture.readbuffers = 1;
495 a->parm.capture.timeperframe.numerator = 1;
496 a->parm.capture.timeperframe.denominator = 10;
497 return 0;
498}
499
500static const struct v4l2_ioctl_ops rmi_f54_video_ioctl_ops = {
501 .vidioc_querycap = rmi_f54_vidioc_querycap,
502
503 .vidioc_enum_fmt_vid_cap = rmi_f54_vidioc_enum_fmt,
504 .vidioc_s_fmt_vid_cap = rmi_f54_vidioc_fmt,
505 .vidioc_g_fmt_vid_cap = rmi_f54_vidioc_fmt,
506 .vidioc_try_fmt_vid_cap = rmi_f54_vidioc_fmt,
507 .vidioc_g_parm = rmi_f54_vidioc_g_parm,
508
509 .vidioc_enum_input = rmi_f54_vidioc_enum_input,
510 .vidioc_g_input = rmi_f54_vidioc_g_input,
511 .vidioc_s_input = rmi_f54_vidioc_s_input,
512
513 .vidioc_reqbufs = vb2_ioctl_reqbufs,
514 .vidioc_create_bufs = vb2_ioctl_create_bufs,
515 .vidioc_querybuf = vb2_ioctl_querybuf,
516 .vidioc_qbuf = vb2_ioctl_qbuf,
517 .vidioc_dqbuf = vb2_ioctl_dqbuf,
518 .vidioc_expbuf = vb2_ioctl_expbuf,
519
520 .vidioc_streamon = vb2_ioctl_streamon,
521 .vidioc_streamoff = vb2_ioctl_streamoff,
522};
523
524static const struct video_device rmi_f54_video_device = {
525 .name = "Synaptics RMI4",
526 .fops = &rmi_f54_video_fops,
527 .ioctl_ops = &rmi_f54_video_ioctl_ops,
528 .release = video_device_release_empty,
529 .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH |
530 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING,
531};
532
533static void rmi_f54_work(struct work_struct *work)
534{
535 struct f54_data *f54 = container_of(work, struct f54_data, work.work);
536 struct rmi_function *fn = f54->fn;
537 u8 fifo[2];
538 int report_size;
539 u8 command;
540 int error;
541 int i;
542
543 report_size = rmi_f54_get_report_size(f54);
544 if (report_size == 0) {
545 dev_err(&fn->dev, "Bad report size, report type=%d\n",
546 f54->report_type);
547 error = -EINVAL;
548 goto error; /* retry won't help */
549 }
550
551 mutex_lock(&f54->data_mutex);
552
553 /*
554 * Need to check if command has completed.
555 * If not try again later.
556 */
557 error = rmi_read(fn->rmi_dev, f54->fn->fd.command_base_addr,
558 &command);
559 if (error) {
560 dev_err(&fn->dev, "Failed to read back command\n");
561 goto error;
562 }
563 if (command & F54_GET_REPORT) {
564 if (time_after(jiffies, f54->timeout)) {
565 dev_err(&fn->dev, "Get report command timed out\n");
566 error = -ETIMEDOUT;
567 }
568 report_size = 0;
569 goto error;
570 }
571
572 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "Get report command completed, reading data\n");
573
574 for (i = 0; i < report_size; i += F54_REPORT_DATA_SIZE) {
575 int size = min(F54_REPORT_DATA_SIZE, report_size - i);
576
577 fifo[0] = i & 0xff;
578 fifo[1] = i >> 8;
579 error = rmi_write_block(fn->rmi_dev,
580 fn->fd.data_base_addr + F54_FIFO_OFFSET,
581 fifo, sizeof(fifo));
582 if (error) {
583 dev_err(&fn->dev, "Failed to set fifo start offset\n");
584 goto abort;
585 }
586
587 error = rmi_read_block(fn->rmi_dev, fn->fd.data_base_addr +
588 F54_REPORT_DATA_OFFSET,
589 f54->report_data + i, size);
590 if (error) {
591 dev_err(&fn->dev, "%s: read [%d bytes] returned %d\n",
592 __func__, size, error);
593 goto abort;
594 }
595 }
596
597abort:
598 f54->report_size = error ? 0 : report_size;
599error:
600 if (error)
601 report_size = 0;
602
603 if (report_size == 0 && !error) {
604 queue_delayed_work(f54->workqueue, &f54->work,
605 msecs_to_jiffies(1));
606 } else {
607 f54->is_busy = false;
608 complete(&f54->cmd_done);
609 }
610
611 mutex_unlock(&f54->data_mutex);
612}
613
614static int rmi_f54_config(struct rmi_function *fn)
615{
616 struct rmi_driver *drv = fn->rmi_dev->driver;
617
618 drv->clear_irq_bits(fn->rmi_dev, fn->irq_mask);
619
620 return 0;
621}
622
623static int rmi_f54_detect(struct rmi_function *fn)
624{
625 int error;
626 struct f54_data *f54;
627 u8 buf[6];
628
629 f54 = dev_get_drvdata(&fn->dev);
630
631 error = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr,
632 buf, sizeof(buf));
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 = buf[0];
640 f54->num_tx_electrodes = buf[1];
641 f54->capabilities = buf[2];
642 f54->clock_rate = buf[3] | (buf[4] << 8);
643 f54->family = buf[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
661static 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 array3_size(tx, rx, sizeof(u16)),
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 rmi_f54_set_input(f54, 0);
697
698 /* register video device */
699 strscpy(f54->v4l2.name, F54_NAME, sizeof(f54->v4l2.name));
700 ret = v4l2_device_register(&fn->dev, &f54->v4l2);
701 if (ret) {
702 dev_err(&fn->dev, "Unable to register video dev.\n");
703 goto remove_wq;
704 }
705
706 /* initialize the queue */
707 mutex_init(&f54->lock);
708 f54->queue = rmi_f54_queue;
709 f54->queue.drv_priv = f54;
710 f54->queue.lock = &f54->lock;
711 f54->queue.dev = &fn->dev;
712
713 ret = vb2_queue_init(&f54->queue);
714 if (ret)
715 goto remove_v4l2;
716
717 f54->vdev = rmi_f54_video_device;
718 f54->vdev.v4l2_dev = &f54->v4l2;
719 f54->vdev.lock = &f54->lock;
720 f54->vdev.vfl_dir = VFL_DIR_RX;
721 f54->vdev.queue = &f54->queue;
722 video_set_drvdata(&f54->vdev, f54);
723
724 ret = video_register_device(&f54->vdev, VFL_TYPE_TOUCH, -1);
725 if (ret) {
726 dev_err(&fn->dev, "Unable to register video subdevice.");
727 goto remove_v4l2;
728 }
729
730 return 0;
731
732remove_v4l2:
733 v4l2_device_unregister(&f54->v4l2);
734remove_wq:
735 cancel_delayed_work_sync(&f54->work);
736 destroy_workqueue(f54->workqueue);
737 return ret;
738}
739
740static 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 destroy_workqueue(f54->workqueue);
747}
748
749struct rmi_function_handler rmi_f54_handler = {
750 .driver = {
751 .name = F54_NAME,
752 },
753 .func = 0x54,
754 .probe = rmi_f54_probe,
755 .config = rmi_f54_config,
756 .remove = rmi_f54_remove,
757};
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/*
28 * The smbus protocol can read only 32 bytes max at a time.
29 * But this should be fine for i2c/spi as well.
30 */
31#define F54_REPORT_DATA_SIZE 32
32
33/* F54 commands */
34#define F54_GET_REPORT 1
35#define F54_FORCE_CAL 2
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_REPORT_NONE: No Image Report.
46 *
47 * @F54_8BIT_IMAGE: Normalized 8-Bit Image Report. The capacitance variance
48 * from baseline for each pixel.
49 *
50 * @F54_16BIT_IMAGE: Normalized 16-Bit Image Report. The capacitance variance
51 * from baseline for each pixel.
52 *
53 * @F54_RAW_16BIT_IMAGE:
54 * Raw 16-Bit Image Report. The raw capacitance for each
55 * pixel.
56 *
57 * @F54_TRUE_BASELINE: True Baseline Report. The baseline capacitance for each
58 * pixel.
59 *
60 * @F54_FULL_RAW_CAP: Full Raw Capacitance Report. The raw capacitance with
61 * low reference set to its minimum value and high
62 * reference set to its maximum value.
63 *
64 * @F54_FULL_RAW_CAP_RX_OFFSET_REMOVED:
65 * Full Raw Capacitance with Receiver Offset Removed
66 * Report. Set Low reference to its minimum value and high
67 * references to its maximum value, then report the raw
68 * capacitance for each pixel.
69 *
70 * @F54_MAX_REPORT_TYPE:
71 * Maximum number of Report Types. Used for sanity
72 * checking.
73 */
74enum rmi_f54_report_type {
75 F54_REPORT_NONE = 0,
76 F54_8BIT_IMAGE = 1,
77 F54_16BIT_IMAGE = 2,
78 F54_RAW_16BIT_IMAGE = 3,
79 F54_TRUE_BASELINE = 9,
80 F54_FULL_RAW_CAP = 19,
81 F54_FULL_RAW_CAP_RX_OFFSET_REMOVED = 20,
82 F54_MAX_REPORT_TYPE,
83};
84
85static const char * const rmi_f54_report_type_names[] = {
86 [F54_REPORT_NONE] = "Unknown",
87 [F54_8BIT_IMAGE] = "Normalized 8-Bit Image",
88 [F54_16BIT_IMAGE] = "Normalized 16-Bit Image",
89 [F54_RAW_16BIT_IMAGE] = "Raw 16-Bit Image",
90 [F54_TRUE_BASELINE] = "True Baseline",
91 [F54_FULL_RAW_CAP] = "Full Raw Capacitance",
92 [F54_FULL_RAW_CAP_RX_OFFSET_REMOVED]
93 = "Full Raw Capacitance RX Offset Removed",
94};
95
96struct f54_data {
97 struct rmi_function *fn;
98
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
109 bool is_busy;
110 struct mutex status_mutex;
111 struct mutex data_mutex;
112
113 struct workqueue_struct *workqueue;
114 struct delayed_work work;
115 unsigned long timeout;
116
117 struct completion cmd_done;
118
119 /* V4L2 support */
120 struct v4l2_device v4l2;
121 struct v4l2_pix_format format;
122 struct video_device vdev;
123 struct vb2_queue queue;
124 struct mutex lock;
125 u32 sequence;
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 */
134static 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
153static 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
162static 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
177static 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 goto unlock;
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
212unlock:
213 mutex_unlock(&f54->data_mutex);
214
215 return error;
216}
217
218static size_t rmi_f54_get_report_size(struct f54_data *f54)
219{
220 struct rmi_device *rmi_dev = f54->fn->rmi_dev;
221 struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
222 u8 rx = drv_data->num_rx_electrodes ? : f54->num_rx_electrodes;
223 u8 tx = drv_data->num_tx_electrodes ? : f54->num_tx_electrodes;
224 size_t size;
225
226 switch (rmi_f54_get_reptype(f54, f54->input)) {
227 case F54_8BIT_IMAGE:
228 size = rx * tx;
229 break;
230 case F54_16BIT_IMAGE:
231 case F54_RAW_16BIT_IMAGE:
232 case F54_TRUE_BASELINE:
233 case F54_FULL_RAW_CAP:
234 case F54_FULL_RAW_CAP_RX_OFFSET_REMOVED:
235 size = sizeof(u16) * rx * tx;
236 break;
237 default:
238 size = 0;
239 }
240
241 return size;
242}
243
244static int rmi_f54_get_pixel_fmt(enum rmi_f54_report_type reptype, u32 *pixfmt)
245{
246 int ret = 0;
247
248 switch (reptype) {
249 case F54_8BIT_IMAGE:
250 *pixfmt = V4L2_TCH_FMT_DELTA_TD08;
251 break;
252
253 case F54_16BIT_IMAGE:
254 *pixfmt = V4L2_TCH_FMT_DELTA_TD16;
255 break;
256
257 case F54_RAW_16BIT_IMAGE:
258 case F54_TRUE_BASELINE:
259 case F54_FULL_RAW_CAP:
260 case F54_FULL_RAW_CAP_RX_OFFSET_REMOVED:
261 *pixfmt = V4L2_TCH_FMT_TU16;
262 break;
263
264 case F54_REPORT_NONE:
265 case F54_MAX_REPORT_TYPE:
266 ret = -EINVAL;
267 break;
268 }
269
270 return ret;
271}
272
273static const struct v4l2_file_operations rmi_f54_video_fops = {
274 .owner = THIS_MODULE,
275 .open = v4l2_fh_open,
276 .release = vb2_fop_release,
277 .unlocked_ioctl = video_ioctl2,
278 .read = vb2_fop_read,
279 .mmap = vb2_fop_mmap,
280 .poll = vb2_fop_poll,
281};
282
283static int rmi_f54_queue_setup(struct vb2_queue *q, unsigned int *nbuffers,
284 unsigned int *nplanes, unsigned int sizes[],
285 struct device *alloc_devs[])
286{
287 struct f54_data *f54 = q->drv_priv;
288
289 if (*nplanes)
290 return sizes[0] < rmi_f54_get_report_size(f54) ? -EINVAL : 0;
291
292 *nplanes = 1;
293 sizes[0] = rmi_f54_get_report_size(f54);
294
295 return 0;
296}
297
298static void rmi_f54_buffer_queue(struct vb2_buffer *vb)
299{
300 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
301 struct f54_data *f54 = vb2_get_drv_priv(vb->vb2_queue);
302 u16 *ptr;
303 enum vb2_buffer_state state;
304 enum rmi_f54_report_type reptype;
305 int ret;
306
307 mutex_lock(&f54->status_mutex);
308
309 vb2_set_plane_payload(vb, 0, 0);
310 reptype = rmi_f54_get_reptype(f54, f54->input);
311 if (reptype == F54_REPORT_NONE) {
312 state = VB2_BUF_STATE_ERROR;
313 goto done;
314 }
315
316 if (f54->is_busy) {
317 state = VB2_BUF_STATE_ERROR;
318 goto done;
319 }
320
321 ret = rmi_f54_request_report(f54->fn, reptype);
322 if (ret) {
323 dev_err(&f54->fn->dev, "Error requesting F54 report\n");
324 state = VB2_BUF_STATE_ERROR;
325 goto done;
326 }
327
328 /* get frame data */
329 mutex_lock(&f54->data_mutex);
330
331 while (f54->is_busy) {
332 mutex_unlock(&f54->data_mutex);
333 if (!wait_for_completion_timeout(&f54->cmd_done,
334 msecs_to_jiffies(1000))) {
335 dev_err(&f54->fn->dev, "Timed out\n");
336 state = VB2_BUF_STATE_ERROR;
337 goto done;
338 }
339 mutex_lock(&f54->data_mutex);
340 }
341
342 ptr = vb2_plane_vaddr(vb, 0);
343 if (!ptr) {
344 dev_err(&f54->fn->dev, "Error acquiring frame ptr\n");
345 state = VB2_BUF_STATE_ERROR;
346 goto data_done;
347 }
348
349 memcpy(ptr, f54->report_data, f54->report_size);
350 vb2_set_plane_payload(vb, 0, rmi_f54_get_report_size(f54));
351 state = VB2_BUF_STATE_DONE;
352
353data_done:
354 mutex_unlock(&f54->data_mutex);
355done:
356 vb->timestamp = ktime_get_ns();
357 vbuf->field = V4L2_FIELD_NONE;
358 vbuf->sequence = f54->sequence++;
359 vb2_buffer_done(vb, state);
360 mutex_unlock(&f54->status_mutex);
361}
362
363static void rmi_f54_stop_streaming(struct vb2_queue *q)
364{
365 struct f54_data *f54 = vb2_get_drv_priv(q);
366
367 f54->sequence = 0;
368}
369
370/* V4L2 structures */
371static const struct vb2_ops rmi_f54_queue_ops = {
372 .queue_setup = rmi_f54_queue_setup,
373 .buf_queue = rmi_f54_buffer_queue,
374 .stop_streaming = rmi_f54_stop_streaming,
375 .wait_prepare = vb2_ops_wait_prepare,
376 .wait_finish = vb2_ops_wait_finish,
377};
378
379static const struct vb2_queue rmi_f54_queue = {
380 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
381 .io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ,
382 .buf_struct_size = sizeof(struct vb2_v4l2_buffer),
383 .ops = &rmi_f54_queue_ops,
384 .mem_ops = &vb2_vmalloc_memops,
385 .timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC,
386};
387
388static int rmi_f54_vidioc_querycap(struct file *file, void *priv,
389 struct v4l2_capability *cap)
390{
391 struct f54_data *f54 = video_drvdata(file);
392
393 strlcpy(cap->driver, F54_NAME, sizeof(cap->driver));
394 strlcpy(cap->card, SYNAPTICS_INPUT_DEVICE_NAME, sizeof(cap->card));
395 snprintf(cap->bus_info, sizeof(cap->bus_info),
396 "rmi4:%s", dev_name(&f54->fn->dev));
397
398 return 0;
399}
400
401static int rmi_f54_vidioc_enum_input(struct file *file, void *priv,
402 struct v4l2_input *i)
403{
404 struct f54_data *f54 = video_drvdata(file);
405 enum rmi_f54_report_type reptype;
406
407 reptype = rmi_f54_get_reptype(f54, i->index);
408 if (reptype == F54_REPORT_NONE)
409 return -EINVAL;
410
411 i->type = V4L2_INPUT_TYPE_TOUCH;
412
413 strlcpy(i->name, rmi_f54_report_type_names[reptype], sizeof(i->name));
414 return 0;
415}
416
417static int rmi_f54_set_input(struct f54_data *f54, unsigned int i)
418{
419 struct rmi_device *rmi_dev = f54->fn->rmi_dev;
420 struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
421 u8 rx = drv_data->num_rx_electrodes ? : f54->num_rx_electrodes;
422 u8 tx = drv_data->num_tx_electrodes ? : f54->num_tx_electrodes;
423 struct v4l2_pix_format *f = &f54->format;
424 enum rmi_f54_report_type reptype;
425 int ret;
426
427 reptype = rmi_f54_get_reptype(f54, i);
428 if (reptype == F54_REPORT_NONE)
429 return -EINVAL;
430
431 ret = rmi_f54_get_pixel_fmt(reptype, &f->pixelformat);
432 if (ret)
433 return ret;
434
435 f54->input = i;
436
437 f->width = rx;
438 f->height = tx;
439 f->field = V4L2_FIELD_NONE;
440 f->colorspace = V4L2_COLORSPACE_RAW;
441 f->bytesperline = f->width * sizeof(u16);
442 f->sizeimage = f->width * f->height * sizeof(u16);
443
444 return 0;
445}
446
447static int rmi_f54_vidioc_s_input(struct file *file, void *priv, unsigned int i)
448{
449 return rmi_f54_set_input(video_drvdata(file), i);
450}
451
452static int rmi_f54_vidioc_g_input(struct file *file, void *priv,
453 unsigned int *i)
454{
455 struct f54_data *f54 = video_drvdata(file);
456
457 *i = f54->input;
458
459 return 0;
460}
461
462static int rmi_f54_vidioc_fmt(struct file *file, void *priv,
463 struct v4l2_format *f)
464{
465 struct f54_data *f54 = video_drvdata(file);
466
467 f->fmt.pix = f54->format;
468
469 return 0;
470}
471
472static int rmi_f54_vidioc_enum_fmt(struct file *file, void *priv,
473 struct v4l2_fmtdesc *fmt)
474{
475 struct f54_data *f54 = video_drvdata(file);
476
477 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
478 return -EINVAL;
479
480 if (fmt->index)
481 return -EINVAL;
482
483 fmt->pixelformat = f54->format.pixelformat;
484
485 return 0;
486}
487
488static int rmi_f54_vidioc_g_parm(struct file *file, void *fh,
489 struct v4l2_streamparm *a)
490{
491 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
492 return -EINVAL;
493
494 a->parm.capture.readbuffers = 1;
495 a->parm.capture.timeperframe.numerator = 1;
496 a->parm.capture.timeperframe.denominator = 10;
497 return 0;
498}
499
500static const struct v4l2_ioctl_ops rmi_f54_video_ioctl_ops = {
501 .vidioc_querycap = rmi_f54_vidioc_querycap,
502
503 .vidioc_enum_fmt_vid_cap = rmi_f54_vidioc_enum_fmt,
504 .vidioc_s_fmt_vid_cap = rmi_f54_vidioc_fmt,
505 .vidioc_g_fmt_vid_cap = rmi_f54_vidioc_fmt,
506 .vidioc_try_fmt_vid_cap = rmi_f54_vidioc_fmt,
507 .vidioc_g_parm = rmi_f54_vidioc_g_parm,
508
509 .vidioc_enum_input = rmi_f54_vidioc_enum_input,
510 .vidioc_g_input = rmi_f54_vidioc_g_input,
511 .vidioc_s_input = rmi_f54_vidioc_s_input,
512
513 .vidioc_reqbufs = vb2_ioctl_reqbufs,
514 .vidioc_create_bufs = vb2_ioctl_create_bufs,
515 .vidioc_querybuf = vb2_ioctl_querybuf,
516 .vidioc_qbuf = vb2_ioctl_qbuf,
517 .vidioc_dqbuf = vb2_ioctl_dqbuf,
518 .vidioc_expbuf = vb2_ioctl_expbuf,
519
520 .vidioc_streamon = vb2_ioctl_streamon,
521 .vidioc_streamoff = vb2_ioctl_streamoff,
522};
523
524static const struct video_device rmi_f54_video_device = {
525 .name = "Synaptics RMI4",
526 .fops = &rmi_f54_video_fops,
527 .ioctl_ops = &rmi_f54_video_ioctl_ops,
528 .release = video_device_release_empty,
529 .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH |
530 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING,
531};
532
533static void rmi_f54_work(struct work_struct *work)
534{
535 struct f54_data *f54 = container_of(work, struct f54_data, work.work);
536 struct rmi_function *fn = f54->fn;
537 u8 fifo[2];
538 int report_size;
539 u8 command;
540 int error;
541 int i;
542
543 report_size = rmi_f54_get_report_size(f54);
544 if (report_size == 0) {
545 dev_err(&fn->dev, "Bad report size, report type=%d\n",
546 f54->report_type);
547 error = -EINVAL;
548 goto error; /* retry won't help */
549 }
550
551 mutex_lock(&f54->data_mutex);
552
553 /*
554 * Need to check if command has completed.
555 * If not try again later.
556 */
557 error = rmi_read(fn->rmi_dev, f54->fn->fd.command_base_addr,
558 &command);
559 if (error) {
560 dev_err(&fn->dev, "Failed to read back command\n");
561 goto error;
562 }
563 if (command & F54_GET_REPORT) {
564 if (time_after(jiffies, f54->timeout)) {
565 dev_err(&fn->dev, "Get report command timed out\n");
566 error = -ETIMEDOUT;
567 }
568 report_size = 0;
569 goto error;
570 }
571
572 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "Get report command completed, reading data\n");
573
574 for (i = 0; i < report_size; i += F54_REPORT_DATA_SIZE) {
575 int size = min(F54_REPORT_DATA_SIZE, report_size - i);
576
577 fifo[0] = i & 0xff;
578 fifo[1] = i >> 8;
579 error = rmi_write_block(fn->rmi_dev,
580 fn->fd.data_base_addr + F54_FIFO_OFFSET,
581 fifo, sizeof(fifo));
582 if (error) {
583 dev_err(&fn->dev, "Failed to set fifo start offset\n");
584 goto abort;
585 }
586
587 error = rmi_read_block(fn->rmi_dev, fn->fd.data_base_addr +
588 F54_REPORT_DATA_OFFSET,
589 f54->report_data + i, size);
590 if (error) {
591 dev_err(&fn->dev, "%s: read [%d bytes] returned %d\n",
592 __func__, size, error);
593 goto abort;
594 }
595 }
596
597abort:
598 f54->report_size = error ? 0 : report_size;
599error:
600 if (error)
601 report_size = 0;
602
603 if (report_size == 0 && !error) {
604 queue_delayed_work(f54->workqueue, &f54->work,
605 msecs_to_jiffies(1));
606 } else {
607 f54->is_busy = false;
608 complete(&f54->cmd_done);
609 }
610
611 mutex_unlock(&f54->data_mutex);
612}
613
614static int rmi_f54_config(struct rmi_function *fn)
615{
616 struct rmi_driver *drv = fn->rmi_dev->driver;
617
618 drv->clear_irq_bits(fn->rmi_dev, fn->irq_mask);
619
620 return 0;
621}
622
623static int rmi_f54_detect(struct rmi_function *fn)
624{
625 int error;
626 struct f54_data *f54;
627 u8 buf[6];
628
629 f54 = dev_get_drvdata(&fn->dev);
630
631 error = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr,
632 buf, sizeof(buf));
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 = buf[0];
640 f54->num_tx_electrodes = buf[1];
641 f54->capabilities = buf[2];
642 f54->clock_rate = buf[3] | (buf[4] << 8);
643 f54->family = buf[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
661static 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 array3_size(tx, rx, sizeof(u16)),
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 rmi_f54_set_input(f54, 0);
697
698 /* register video device */
699 strlcpy(f54->v4l2.name, F54_NAME, sizeof(f54->v4l2.name));
700 ret = v4l2_device_register(&fn->dev, &f54->v4l2);
701 if (ret) {
702 dev_err(&fn->dev, "Unable to register video dev.\n");
703 goto remove_wq;
704 }
705
706 /* initialize the queue */
707 mutex_init(&f54->lock);
708 f54->queue = rmi_f54_queue;
709 f54->queue.drv_priv = f54;
710 f54->queue.lock = &f54->lock;
711 f54->queue.dev = &fn->dev;
712
713 ret = vb2_queue_init(&f54->queue);
714 if (ret)
715 goto remove_v4l2;
716
717 f54->vdev = rmi_f54_video_device;
718 f54->vdev.v4l2_dev = &f54->v4l2;
719 f54->vdev.lock = &f54->lock;
720 f54->vdev.vfl_dir = VFL_DIR_RX;
721 f54->vdev.queue = &f54->queue;
722 video_set_drvdata(&f54->vdev, f54);
723
724 ret = video_register_device(&f54->vdev, VFL_TYPE_TOUCH, -1);
725 if (ret) {
726 dev_err(&fn->dev, "Unable to register video subdevice.");
727 goto remove_v4l2;
728 }
729
730 return 0;
731
732remove_v4l2:
733 v4l2_device_unregister(&f54->v4l2);
734remove_wq:
735 cancel_delayed_work_sync(&f54->work);
736 flush_workqueue(f54->workqueue);
737 destroy_workqueue(f54->workqueue);
738 return ret;
739}
740
741static void rmi_f54_remove(struct rmi_function *fn)
742{
743 struct f54_data *f54 = dev_get_drvdata(&fn->dev);
744
745 video_unregister_device(&f54->vdev);
746 v4l2_device_unregister(&f54->v4l2);
747 destroy_workqueue(f54->workqueue);
748}
749
750struct rmi_function_handler rmi_f54_handler = {
751 .driver = {
752 .name = F54_NAME,
753 },
754 .func = 0x54,
755 .probe = rmi_f54_probe,
756 .config = rmi_f54_config,
757 .remove = rmi_f54_remove,
758};