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20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/delay.h>
23#include <linux/init.h>
24#include <linux/slab.h>
25#include <linux/module.h>
26#include <linux/completion.h>
27#include <linux/uaccess.h>
28#include <linux/usb.h>
29#include <linux/printk.h>
30#include <linux/input.h>
31#include <linux/input/mt.h>
32#include <linux/usb/input.h>
33#include <linux/videodev2.h>
34#include <media/v4l2-device.h>
35#include <media/v4l2-dev.h>
36#include <media/v4l2-ioctl.h>
37#include <media/v4l2-ctrls.h>
38#include <media/videobuf2-v4l2.h>
39#include <media/videobuf2-dma-sg.h>
40
41
42struct sur40_header {
43
44 __le16 type;
45 __le16 count;
46
47 __le32 packet_id;
48
49 __le32 timestamp;
50 __le32 unknown;
51
52} __packed;
53
54struct sur40_blob {
55
56 __le16 blob_id;
57
58 u8 action;
59 u8 type;
60
61 __le16 bb_pos_x;
62 __le16 bb_pos_y;
63
64 __le16 bb_size_x;
65 __le16 bb_size_y;
66
67 __le16 pos_x;
68 __le16 pos_y;
69
70 __le16 ctr_x;
71 __le16 ctr_y;
72
73 __le16 axis_x;
74 __le16 axis_y;
75
76 __le32 angle;
77
78
79 __le32 area;
80
81 u8 padding[24];
82
83 __le32 tag_id;
84 __le32 unknown;
85
86} __packed;
87
88
89struct sur40_data {
90 struct sur40_header header;
91 struct sur40_blob blobs[];
92} __packed;
93
94
95
96struct sur40_image_header {
97 __le32 magic;
98 __le32 packet_id;
99 __le32 size;
100 __le32 timestamp;
101 __le32 unknown;
102} __packed;
103
104
105#define DRIVER_SHORT "sur40"
106#define DRIVER_LONG "Samsung SUR40"
107#define DRIVER_AUTHOR "Florian 'floe' Echtler <floe@butterbrot.org>"
108#define DRIVER_DESC "Surface2.0/SUR40/PixelSense input driver"
109
110
111#define ID_MICROSOFT 0x045e
112#define ID_SUR40 0x0775
113
114
115#define SENSOR_RES_X 1920
116#define SENSOR_RES_Y 1080
117
118
119#define TOUCH_ENDPOINT 0x86
120
121
122#define VIDEO_ENDPOINT 0x82
123
124
125#define VIDEO_HEADER_MAGIC 0x46425553
126#define VIDEO_PACKET_SIZE 16384
127
128
129#define POLL_INTERVAL 1
130
131
132#define MAX_CONTACTS 64
133
134
135#define SUR40_GET_VERSION 0xb0
136#define SUR40_ACCEL_CAPS 0xb3
137#define SUR40_SENSOR_CAPS 0xc1
138
139#define SUR40_POKE 0xc5
140#define SUR40_PEEK 0xc4
141
142#define SUR40_GET_STATE 0xc5
143#define SUR40_GET_SENSORS 0xb1
144
145#define SUR40_BLOB 0x01
146#define SUR40_TOUCH 0x02
147#define SUR40_TAG 0x04
148
149
150#define SUR40_BRIGHTNESS_MAX 0xff
151#define SUR40_BRIGHTNESS_MIN 0x00
152#define SUR40_BRIGHTNESS_DEF 0xff
153
154#define SUR40_CONTRAST_MAX 0x0f
155#define SUR40_CONTRAST_MIN 0x00
156#define SUR40_CONTRAST_DEF 0x0a
157
158#define SUR40_GAIN_MAX 0x09
159#define SUR40_GAIN_MIN 0x00
160#define SUR40_GAIN_DEF 0x08
161
162#define SUR40_BACKLIGHT_MAX 0x01
163#define SUR40_BACKLIGHT_MIN 0x00
164#define SUR40_BACKLIGHT_DEF 0x01
165
166#define sur40_str(s) #s
167#define SUR40_PARAM_RANGE(lo, hi) " (range " sur40_str(lo) "-" sur40_str(hi) ")"
168
169
170static uint brightness = SUR40_BRIGHTNESS_DEF;
171module_param(brightness, uint, 0644);
172MODULE_PARM_DESC(brightness, "set initial brightness"
173 SUR40_PARAM_RANGE(SUR40_BRIGHTNESS_MIN, SUR40_BRIGHTNESS_MAX));
174static uint contrast = SUR40_CONTRAST_DEF;
175module_param(contrast, uint, 0644);
176MODULE_PARM_DESC(contrast, "set initial contrast"
177 SUR40_PARAM_RANGE(SUR40_CONTRAST_MIN, SUR40_CONTRAST_MAX));
178static uint gain = SUR40_GAIN_DEF;
179module_param(gain, uint, 0644);
180MODULE_PARM_DESC(gain, "set initial gain"
181 SUR40_PARAM_RANGE(SUR40_GAIN_MIN, SUR40_GAIN_MAX));
182
183static const struct v4l2_pix_format sur40_pix_format[] = {
184 {
185 .pixelformat = V4L2_TCH_FMT_TU08,
186 .width = SENSOR_RES_X / 2,
187 .height = SENSOR_RES_Y / 2,
188 .field = V4L2_FIELD_NONE,
189 .colorspace = V4L2_COLORSPACE_RAW,
190 .bytesperline = SENSOR_RES_X / 2,
191 .sizeimage = (SENSOR_RES_X/2) * (SENSOR_RES_Y/2),
192 },
193 {
194 .pixelformat = V4L2_PIX_FMT_GREY,
195 .width = SENSOR_RES_X / 2,
196 .height = SENSOR_RES_Y / 2,
197 .field = V4L2_FIELD_NONE,
198 .colorspace = V4L2_COLORSPACE_RAW,
199 .bytesperline = SENSOR_RES_X / 2,
200 .sizeimage = (SENSOR_RES_X/2) * (SENSOR_RES_Y/2),
201 }
202};
203
204
205struct sur40_state {
206
207 struct usb_device *usbdev;
208 struct device *dev;
209 struct input_dev *input;
210
211 struct v4l2_device v4l2;
212 struct video_device vdev;
213 struct mutex lock;
214 struct v4l2_pix_format pix_fmt;
215 struct v4l2_ctrl_handler hdl;
216
217 struct vb2_queue queue;
218 struct list_head buf_list;
219 spinlock_t qlock;
220 int sequence;
221
222 struct sur40_data *bulk_in_buffer;
223 size_t bulk_in_size;
224 u8 bulk_in_epaddr;
225 u8 vsvideo;
226
227 char phys[64];
228};
229
230struct sur40_buffer {
231 struct vb2_v4l2_buffer vb;
232 struct list_head list;
233};
234
235
236static const struct video_device sur40_video_device;
237static const struct vb2_queue sur40_queue;
238static void sur40_process_video(struct sur40_state *sur40);
239static int sur40_s_ctrl(struct v4l2_ctrl *ctrl);
240
241static const struct v4l2_ctrl_ops sur40_ctrl_ops = {
242 .s_ctrl = sur40_s_ctrl,
243};
244
245
246
247
248
249
250
251
252
253
254
255static int sur40_command(struct sur40_state *dev,
256 u8 command, u16 index, void *buffer, u16 size)
257{
258 return usb_control_msg(dev->usbdev, usb_rcvctrlpipe(dev->usbdev, 0),
259 command,
260 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
261 0x00, index, buffer, size, 1000);
262}
263
264
265static int sur40_poke(struct sur40_state *dev, u8 offset, u8 value)
266{
267 int result;
268 u8 index = 0x96;
269
270 result = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0),
271 SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
272 0x32, index, NULL, 0, 1000);
273 if (result < 0)
274 goto error;
275 msleep(5);
276
277 result = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0),
278 SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
279 0x72, offset, NULL, 0, 1000);
280 if (result < 0)
281 goto error;
282 msleep(5);
283
284 result = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0),
285 SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
286 0xb2, value, NULL, 0, 1000);
287 if (result < 0)
288 goto error;
289 msleep(5);
290
291error:
292 return result;
293}
294
295static int sur40_set_preprocessor(struct sur40_state *dev, u8 value)
296{
297 u8 setting_07[2] = { 0x01, 0x00 };
298 u8 setting_17[2] = { 0x85, 0x80 };
299 int result;
300
301 if (value > 1)
302 return -ERANGE;
303
304 result = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0),
305 SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
306 0x07, setting_07[value], NULL, 0, 1000);
307 if (result < 0)
308 goto error;
309 msleep(5);
310
311 result = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0),
312 SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
313 0x17, setting_17[value], NULL, 0, 1000);
314 if (result < 0)
315 goto error;
316 msleep(5);
317
318error:
319 return result;
320}
321
322static void sur40_set_vsvideo(struct sur40_state *handle, u8 value)
323{
324 int i;
325
326 for (i = 0; i < 4; i++)
327 sur40_poke(handle, 0x1c+i, value);
328 handle->vsvideo = value;
329}
330
331static void sur40_set_irlevel(struct sur40_state *handle, u8 value)
332{
333 int i;
334
335 for (i = 0; i < 8; i++)
336 sur40_poke(handle, 0x08+(2*i), value);
337}
338
339
340static int sur40_init(struct sur40_state *dev)
341{
342 int result;
343 u8 *buffer;
344
345 buffer = kmalloc(24, GFP_KERNEL);
346 if (!buffer) {
347 result = -ENOMEM;
348 goto error;
349 }
350
351
352 result = sur40_command(dev, SUR40_GET_VERSION, 0x00, buffer, 12);
353 if (result < 0)
354 goto error;
355
356 result = sur40_command(dev, SUR40_GET_VERSION, 0x01, buffer, 12);
357 if (result < 0)
358 goto error;
359
360 result = sur40_command(dev, SUR40_GET_VERSION, 0x02, buffer, 12);
361 if (result < 0)
362 goto error;
363
364 result = sur40_command(dev, SUR40_SENSOR_CAPS, 0x00, buffer, 24);
365 if (result < 0)
366 goto error;
367
368 result = sur40_command(dev, SUR40_ACCEL_CAPS, 0x00, buffer, 5);
369 if (result < 0)
370 goto error;
371
372 result = sur40_command(dev, SUR40_GET_VERSION, 0x03, buffer, 12);
373 if (result < 0)
374 goto error;
375
376 result = 0;
377
378
379
380
381
382error:
383 kfree(buffer);
384 return result;
385}
386
387
388
389
390
391
392static int sur40_open(struct input_dev *input)
393{
394 struct sur40_state *sur40 = input_get_drvdata(input);
395
396 dev_dbg(sur40->dev, "open\n");
397 return sur40_init(sur40);
398}
399
400
401static void sur40_close(struct input_dev *input)
402{
403 struct sur40_state *sur40 = input_get_drvdata(input);
404
405 dev_dbg(sur40->dev, "close\n");
406
407
408
409
410}
411
412
413
414
415
416static void sur40_report_blob(struct sur40_blob *blob, struct input_dev *input)
417{
418 int wide, major, minor;
419 int bb_size_x, bb_size_y, pos_x, pos_y, ctr_x, ctr_y, slotnum;
420
421 if (blob->type != SUR40_TOUCH)
422 return;
423
424 slotnum = input_mt_get_slot_by_key(input, blob->blob_id);
425 if (slotnum < 0 || slotnum >= MAX_CONTACTS)
426 return;
427
428 bb_size_x = le16_to_cpu(blob->bb_size_x);
429 bb_size_y = le16_to_cpu(blob->bb_size_y);
430
431 pos_x = le16_to_cpu(blob->pos_x);
432 pos_y = le16_to_cpu(blob->pos_y);
433
434 ctr_x = le16_to_cpu(blob->ctr_x);
435 ctr_y = le16_to_cpu(blob->ctr_y);
436
437 input_mt_slot(input, slotnum);
438 input_mt_report_slot_state(input, MT_TOOL_FINGER, 1);
439 wide = (bb_size_x > bb_size_y);
440 major = max(bb_size_x, bb_size_y);
441 minor = min(bb_size_x, bb_size_y);
442
443 input_report_abs(input, ABS_MT_POSITION_X, pos_x);
444 input_report_abs(input, ABS_MT_POSITION_Y, pos_y);
445 input_report_abs(input, ABS_MT_TOOL_X, ctr_x);
446 input_report_abs(input, ABS_MT_TOOL_Y, ctr_y);
447
448
449 input_report_abs(input, ABS_MT_ORIENTATION, wide);
450 input_report_abs(input, ABS_MT_TOUCH_MAJOR, major);
451 input_report_abs(input, ABS_MT_TOUCH_MINOR, minor);
452}
453
454
455static void sur40_poll(struct input_dev *input)
456{
457 struct sur40_state *sur40 = input_get_drvdata(input);
458 int result, bulk_read, need_blobs, packet_blobs, i;
459 struct sur40_header *header = &sur40->bulk_in_buffer->header;
460 struct sur40_blob *inblob = &sur40->bulk_in_buffer->blobs[0];
461
462 dev_dbg(sur40->dev, "poll\n");
463
464 need_blobs = -1;
465
466 do {
467
468
469 result = usb_bulk_msg(sur40->usbdev,
470 usb_rcvbulkpipe(sur40->usbdev, sur40->bulk_in_epaddr),
471 sur40->bulk_in_buffer, sur40->bulk_in_size,
472 &bulk_read, 1000);
473
474 dev_dbg(sur40->dev, "received %d bytes\n", bulk_read);
475
476 if (result < 0) {
477 dev_err(sur40->dev, "error in usb_bulk_read\n");
478 return;
479 }
480
481 result = bulk_read - sizeof(struct sur40_header);
482
483 if (result % sizeof(struct sur40_blob) != 0) {
484 dev_err(sur40->dev, "transfer size mismatch\n");
485 return;
486 }
487
488
489 if (need_blobs == -1) {
490 need_blobs = le16_to_cpu(header->count);
491 dev_dbg(sur40->dev, "need %d blobs\n", need_blobs);
492
493 }
494
495
496
497
498
499
500
501
502
503
504
505
506 packet_blobs = result / sizeof(struct sur40_blob);
507 dev_dbg(sur40->dev, "received %d blobs\n", packet_blobs);
508
509
510 if (packet_blobs > need_blobs)
511 packet_blobs = need_blobs;
512
513 for (i = 0; i < packet_blobs; i++) {
514 need_blobs--;
515 dev_dbg(sur40->dev, "processing blob\n");
516 sur40_report_blob(&(inblob[i]), input);
517 }
518
519 } while (need_blobs > 0);
520
521 input_mt_sync_frame(input);
522 input_sync(input);
523
524 sur40_process_video(sur40);
525}
526
527
528static void sur40_process_video(struct sur40_state *sur40)
529{
530
531 struct sur40_image_header *img = (void *)(sur40->bulk_in_buffer);
532 struct sur40_buffer *new_buf;
533 struct usb_sg_request sgr;
534 struct sg_table *sgt;
535 int result, bulk_read;
536
537 if (!vb2_start_streaming_called(&sur40->queue))
538 return;
539
540
541 spin_lock(&sur40->qlock);
542 if (list_empty(&sur40->buf_list)) {
543 dev_dbg(sur40->dev, "buffer queue empty\n");
544 spin_unlock(&sur40->qlock);
545 return;
546 }
547 new_buf = list_entry(sur40->buf_list.next, struct sur40_buffer, list);
548 list_del(&new_buf->list);
549 spin_unlock(&sur40->qlock);
550
551 dev_dbg(sur40->dev, "buffer acquired\n");
552
553
554 result = usb_bulk_msg(sur40->usbdev,
555 usb_rcvbulkpipe(sur40->usbdev, VIDEO_ENDPOINT),
556 sur40->bulk_in_buffer, sur40->bulk_in_size,
557 &bulk_read, 1000);
558
559 if (result < 0) {
560 dev_err(sur40->dev, "error in usb_bulk_read\n");
561 goto err_poll;
562 }
563
564 if (bulk_read != sizeof(struct sur40_image_header)) {
565 dev_err(sur40->dev, "received %d bytes (%zd expected)\n",
566 bulk_read, sizeof(struct sur40_image_header));
567 goto err_poll;
568 }
569
570 if (le32_to_cpu(img->magic) != VIDEO_HEADER_MAGIC) {
571 dev_err(sur40->dev, "image magic mismatch\n");
572 goto err_poll;
573 }
574
575 if (le32_to_cpu(img->size) != sur40->pix_fmt.sizeimage) {
576 dev_err(sur40->dev, "image size mismatch\n");
577 goto err_poll;
578 }
579
580 dev_dbg(sur40->dev, "header acquired\n");
581
582 sgt = vb2_dma_sg_plane_desc(&new_buf->vb.vb2_buf, 0);
583
584 result = usb_sg_init(&sgr, sur40->usbdev,
585 usb_rcvbulkpipe(sur40->usbdev, VIDEO_ENDPOINT), 0,
586 sgt->sgl, sgt->nents, sur40->pix_fmt.sizeimage, 0);
587 if (result < 0) {
588 dev_err(sur40->dev, "error %d in usb_sg_init\n", result);
589 goto err_poll;
590 }
591
592 usb_sg_wait(&sgr);
593 if (sgr.status < 0) {
594 dev_err(sur40->dev, "error %d in usb_sg_wait\n", sgr.status);
595 goto err_poll;
596 }
597
598 dev_dbg(sur40->dev, "image acquired\n");
599
600
601 if (sur40->sequence == -1)
602 return;
603
604
605 new_buf->vb.vb2_buf.timestamp = ktime_get_ns();
606 new_buf->vb.sequence = sur40->sequence++;
607 new_buf->vb.field = V4L2_FIELD_NONE;
608 vb2_buffer_done(&new_buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
609 dev_dbg(sur40->dev, "buffer marked done\n");
610 return;
611
612err_poll:
613 vb2_buffer_done(&new_buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
614}
615
616
617static int sur40_input_setup_events(struct input_dev *input_dev)
618{
619 int error;
620
621 input_set_abs_params(input_dev, ABS_MT_POSITION_X,
622 0, SENSOR_RES_X, 0, 0);
623 input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
624 0, SENSOR_RES_Y, 0, 0);
625
626 input_set_abs_params(input_dev, ABS_MT_TOOL_X,
627 0, SENSOR_RES_X, 0, 0);
628 input_set_abs_params(input_dev, ABS_MT_TOOL_Y,
629 0, SENSOR_RES_Y, 0, 0);
630
631
632
633 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
634 0, SENSOR_RES_X, 0, 0);
635 input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR,
636 0, SENSOR_RES_Y, 0, 0);
637
638 input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0);
639
640 error = input_mt_init_slots(input_dev, MAX_CONTACTS,
641 INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
642 if (error) {
643 dev_err(input_dev->dev.parent, "failed to set up slots\n");
644 return error;
645 }
646
647 return 0;
648}
649
650
651static int sur40_probe(struct usb_interface *interface,
652 const struct usb_device_id *id)
653{
654 struct usb_device *usbdev = interface_to_usbdev(interface);
655 struct sur40_state *sur40;
656 struct usb_host_interface *iface_desc;
657 struct usb_endpoint_descriptor *endpoint;
658 struct input_dev *input;
659 int error;
660
661
662 iface_desc = interface->cur_altsetting;
663 if (iface_desc->desc.bInterfaceClass != 0xFF)
664 return -ENODEV;
665
666 if (iface_desc->desc.bNumEndpoints < 5)
667 return -ENODEV;
668
669
670 endpoint = &iface_desc->endpoint[4].desc;
671 if (endpoint->bEndpointAddress != TOUCH_ENDPOINT)
672 return -ENODEV;
673
674
675 sur40 = kzalloc(sizeof(struct sur40_state), GFP_KERNEL);
676 if (!sur40)
677 return -ENOMEM;
678
679 input = input_allocate_device();
680 if (!input) {
681 error = -ENOMEM;
682 goto err_free_dev;
683 }
684
685
686 INIT_LIST_HEAD(&sur40->buf_list);
687 spin_lock_init(&sur40->qlock);
688 mutex_init(&sur40->lock);
689
690
691 input->name = DRIVER_LONG;
692 usb_to_input_id(usbdev, &input->id);
693 usb_make_path(usbdev, sur40->phys, sizeof(sur40->phys));
694 strlcat(sur40->phys, "/input0", sizeof(sur40->phys));
695 input->phys = sur40->phys;
696 input->dev.parent = &interface->dev;
697
698 input->open = sur40_open;
699 input->close = sur40_close;
700
701 error = sur40_input_setup_events(input);
702 if (error)
703 goto err_free_input;
704
705 input_set_drvdata(input, sur40);
706 error = input_setup_polling(input, sur40_poll);
707 if (error) {
708 dev_err(&interface->dev, "failed to set up polling");
709 goto err_free_input;
710 }
711
712 input_set_poll_interval(input, POLL_INTERVAL);
713
714 sur40->usbdev = usbdev;
715 sur40->dev = &interface->dev;
716 sur40->input = input;
717
718
719 sur40->bulk_in_size = usb_endpoint_maxp(endpoint);
720 sur40->bulk_in_epaddr = endpoint->bEndpointAddress;
721 sur40->bulk_in_buffer = kmalloc(sur40->bulk_in_size, GFP_KERNEL);
722 if (!sur40->bulk_in_buffer) {
723 dev_err(&interface->dev, "Unable to allocate input buffer.");
724 error = -ENOMEM;
725 goto err_free_input;
726 }
727
728
729 error = input_register_device(input);
730 if (error) {
731 dev_err(&interface->dev,
732 "Unable to register polled input device.");
733 goto err_free_buffer;
734 }
735
736
737 snprintf(sur40->v4l2.name, sizeof(sur40->v4l2.name), "%s", DRIVER_LONG);
738 error = v4l2_device_register(sur40->dev, &sur40->v4l2);
739 if (error) {
740 dev_err(&interface->dev,
741 "Unable to register video master device.");
742 goto err_unreg_v4l2;
743 }
744
745
746 sur40->queue = sur40_queue;
747 sur40->queue.drv_priv = sur40;
748 sur40->queue.lock = &sur40->lock;
749 sur40->queue.dev = sur40->dev;
750
751
752 error = vb2_queue_init(&sur40->queue);
753 if (error)
754 goto err_unreg_v4l2;
755
756 sur40->pix_fmt = sur40_pix_format[0];
757 sur40->vdev = sur40_video_device;
758 sur40->vdev.v4l2_dev = &sur40->v4l2;
759 sur40->vdev.lock = &sur40->lock;
760 sur40->vdev.queue = &sur40->queue;
761 video_set_drvdata(&sur40->vdev, sur40);
762
763
764 v4l2_ctrl_handler_init(&sur40->hdl, 4);
765 sur40->v4l2.ctrl_handler = &sur40->hdl;
766 sur40->vsvideo = (SUR40_CONTRAST_DEF << 4) | SUR40_GAIN_DEF;
767
768 v4l2_ctrl_new_std(&sur40->hdl, &sur40_ctrl_ops, V4L2_CID_BRIGHTNESS,
769 SUR40_BRIGHTNESS_MIN, SUR40_BRIGHTNESS_MAX, 1, clamp(brightness,
770 (uint)SUR40_BRIGHTNESS_MIN, (uint)SUR40_BRIGHTNESS_MAX));
771
772 v4l2_ctrl_new_std(&sur40->hdl, &sur40_ctrl_ops, V4L2_CID_CONTRAST,
773 SUR40_CONTRAST_MIN, SUR40_CONTRAST_MAX, 1, clamp(contrast,
774 (uint)SUR40_CONTRAST_MIN, (uint)SUR40_CONTRAST_MAX));
775
776 v4l2_ctrl_new_std(&sur40->hdl, &sur40_ctrl_ops, V4L2_CID_GAIN,
777 SUR40_GAIN_MIN, SUR40_GAIN_MAX, 1, clamp(gain,
778 (uint)SUR40_GAIN_MIN, (uint)SUR40_GAIN_MAX));
779
780 v4l2_ctrl_new_std(&sur40->hdl, &sur40_ctrl_ops,
781 V4L2_CID_BACKLIGHT_COMPENSATION, SUR40_BACKLIGHT_MIN,
782 SUR40_BACKLIGHT_MAX, 1, SUR40_BACKLIGHT_DEF);
783
784 v4l2_ctrl_handler_setup(&sur40->hdl);
785
786 if (sur40->hdl.error) {
787 dev_err(&interface->dev,
788 "Unable to register video controls.");
789 v4l2_ctrl_handler_free(&sur40->hdl);
790 goto err_unreg_v4l2;
791 }
792
793 error = video_register_device(&sur40->vdev, VFL_TYPE_TOUCH, -1);
794 if (error) {
795 dev_err(&interface->dev,
796 "Unable to register video subdevice.");
797 goto err_unreg_video;
798 }
799
800
801 usb_set_intfdata(interface, sur40);
802 dev_dbg(&interface->dev, "%s is now attached\n", DRIVER_DESC);
803
804 return 0;
805
806err_unreg_video:
807 video_unregister_device(&sur40->vdev);
808err_unreg_v4l2:
809 v4l2_device_unregister(&sur40->v4l2);
810err_free_buffer:
811 kfree(sur40->bulk_in_buffer);
812err_free_input:
813 input_free_device(input);
814err_free_dev:
815 kfree(sur40);
816
817 return error;
818}
819
820
821static void sur40_disconnect(struct usb_interface *interface)
822{
823 struct sur40_state *sur40 = usb_get_intfdata(interface);
824
825 v4l2_ctrl_handler_free(&sur40->hdl);
826 video_unregister_device(&sur40->vdev);
827 v4l2_device_unregister(&sur40->v4l2);
828
829 input_unregister_device(sur40->input);
830 kfree(sur40->bulk_in_buffer);
831 kfree(sur40);
832
833 usb_set_intfdata(interface, NULL);
834 dev_dbg(&interface->dev, "%s is now disconnected\n", DRIVER_DESC);
835}
836
837
838
839
840
841
842
843
844static int sur40_queue_setup(struct vb2_queue *q,
845 unsigned int *nbuffers, unsigned int *nplanes,
846 unsigned int sizes[], struct device *alloc_devs[])
847{
848 struct sur40_state *sur40 = vb2_get_drv_priv(q);
849
850 if (q->num_buffers + *nbuffers < 3)
851 *nbuffers = 3 - q->num_buffers;
852
853 if (*nplanes)
854 return sizes[0] < sur40->pix_fmt.sizeimage ? -EINVAL : 0;
855
856 *nplanes = 1;
857 sizes[0] = sur40->pix_fmt.sizeimage;
858
859 return 0;
860}
861
862
863
864
865
866static int sur40_buffer_prepare(struct vb2_buffer *vb)
867{
868 struct sur40_state *sur40 = vb2_get_drv_priv(vb->vb2_queue);
869 unsigned long size = sur40->pix_fmt.sizeimage;
870
871 if (vb2_plane_size(vb, 0) < size) {
872 dev_err(&sur40->usbdev->dev, "buffer too small (%lu < %lu)\n",
873 vb2_plane_size(vb, 0), size);
874 return -EINVAL;
875 }
876
877 vb2_set_plane_payload(vb, 0, size);
878 return 0;
879}
880
881
882
883
884static void sur40_buffer_queue(struct vb2_buffer *vb)
885{
886 struct sur40_state *sur40 = vb2_get_drv_priv(vb->vb2_queue);
887 struct sur40_buffer *buf = (struct sur40_buffer *)vb;
888
889 spin_lock(&sur40->qlock);
890 list_add_tail(&buf->list, &sur40->buf_list);
891 spin_unlock(&sur40->qlock);
892}
893
894static void return_all_buffers(struct sur40_state *sur40,
895 enum vb2_buffer_state state)
896{
897 struct sur40_buffer *buf, *node;
898
899 spin_lock(&sur40->qlock);
900 list_for_each_entry_safe(buf, node, &sur40->buf_list, list) {
901 vb2_buffer_done(&buf->vb.vb2_buf, state);
902 list_del(&buf->list);
903 }
904 spin_unlock(&sur40->qlock);
905}
906
907
908
909
910
911
912
913static int sur40_start_streaming(struct vb2_queue *vq, unsigned int count)
914{
915 struct sur40_state *sur40 = vb2_get_drv_priv(vq);
916
917 sur40->sequence = 0;
918 return 0;
919}
920
921
922
923
924
925static void sur40_stop_streaming(struct vb2_queue *vq)
926{
927 struct sur40_state *sur40 = vb2_get_drv_priv(vq);
928 vb2_wait_for_all_buffers(vq);
929 sur40->sequence = -1;
930
931
932 return_all_buffers(sur40, VB2_BUF_STATE_ERROR);
933}
934
935
936static int sur40_vidioc_querycap(struct file *file, void *priv,
937 struct v4l2_capability *cap)
938{
939 struct sur40_state *sur40 = video_drvdata(file);
940
941 strlcpy(cap->driver, DRIVER_SHORT, sizeof(cap->driver));
942 strlcpy(cap->card, DRIVER_LONG, sizeof(cap->card));
943 usb_make_path(sur40->usbdev, cap->bus_info, sizeof(cap->bus_info));
944 return 0;
945}
946
947static int sur40_vidioc_enum_input(struct file *file, void *priv,
948 struct v4l2_input *i)
949{
950 if (i->index != 0)
951 return -EINVAL;
952 i->type = V4L2_INPUT_TYPE_TOUCH;
953 i->std = V4L2_STD_UNKNOWN;
954 strlcpy(i->name, "In-Cell Sensor", sizeof(i->name));
955 i->capabilities = 0;
956 return 0;
957}
958
959static int sur40_vidioc_s_input(struct file *file, void *priv, unsigned int i)
960{
961 return (i == 0) ? 0 : -EINVAL;
962}
963
964static int sur40_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
965{
966 *i = 0;
967 return 0;
968}
969
970static int sur40_vidioc_try_fmt(struct file *file, void *priv,
971 struct v4l2_format *f)
972{
973 switch (f->fmt.pix.pixelformat) {
974 case V4L2_PIX_FMT_GREY:
975 f->fmt.pix = sur40_pix_format[1];
976 break;
977
978 default:
979 f->fmt.pix = sur40_pix_format[0];
980 break;
981 }
982
983 return 0;
984}
985
986static int sur40_vidioc_s_fmt(struct file *file, void *priv,
987 struct v4l2_format *f)
988{
989 struct sur40_state *sur40 = video_drvdata(file);
990
991 switch (f->fmt.pix.pixelformat) {
992 case V4L2_PIX_FMT_GREY:
993 sur40->pix_fmt = sur40_pix_format[1];
994 break;
995
996 default:
997 sur40->pix_fmt = sur40_pix_format[0];
998 break;
999 }
1000
1001 f->fmt.pix = sur40->pix_fmt;
1002 return 0;
1003}
1004
1005static int sur40_vidioc_g_fmt(struct file *file, void *priv,
1006 struct v4l2_format *f)
1007{
1008 struct sur40_state *sur40 = video_drvdata(file);
1009
1010 f->fmt.pix = sur40->pix_fmt;
1011 return 0;
1012}
1013
1014static int sur40_s_ctrl(struct v4l2_ctrl *ctrl)
1015{
1016 struct sur40_state *sur40 = container_of(ctrl->handler,
1017 struct sur40_state, hdl);
1018 u8 value = sur40->vsvideo;
1019
1020 switch (ctrl->id) {
1021 case V4L2_CID_BRIGHTNESS:
1022 sur40_set_irlevel(sur40, ctrl->val);
1023 break;
1024 case V4L2_CID_CONTRAST:
1025 value = (value & 0x0f) | (ctrl->val << 4);
1026 sur40_set_vsvideo(sur40, value);
1027 break;
1028 case V4L2_CID_GAIN:
1029 value = (value & 0xf0) | (ctrl->val);
1030 sur40_set_vsvideo(sur40, value);
1031 break;
1032 case V4L2_CID_BACKLIGHT_COMPENSATION:
1033 sur40_set_preprocessor(sur40, ctrl->val);
1034 break;
1035 }
1036 return 0;
1037}
1038
1039static int sur40_ioctl_parm(struct file *file, void *priv,
1040 struct v4l2_streamparm *p)
1041{
1042 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1043 return -EINVAL;
1044
1045 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1046 p->parm.capture.timeperframe.numerator = 1;
1047 p->parm.capture.timeperframe.denominator = 60;
1048 p->parm.capture.readbuffers = 3;
1049 return 0;
1050}
1051
1052static int sur40_vidioc_enum_fmt(struct file *file, void *priv,
1053 struct v4l2_fmtdesc *f)
1054{
1055 if (f->index >= ARRAY_SIZE(sur40_pix_format))
1056 return -EINVAL;
1057
1058 f->pixelformat = sur40_pix_format[f->index].pixelformat;
1059 f->flags = 0;
1060 return 0;
1061}
1062
1063static int sur40_vidioc_enum_framesizes(struct file *file, void *priv,
1064 struct v4l2_frmsizeenum *f)
1065{
1066 struct sur40_state *sur40 = video_drvdata(file);
1067
1068 if ((f->index != 0) || ((f->pixel_format != V4L2_TCH_FMT_TU08)
1069 && (f->pixel_format != V4L2_PIX_FMT_GREY)))
1070 return -EINVAL;
1071
1072 f->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1073 f->discrete.width = sur40->pix_fmt.width;
1074 f->discrete.height = sur40->pix_fmt.height;
1075 return 0;
1076}
1077
1078static int sur40_vidioc_enum_frameintervals(struct file *file, void *priv,
1079 struct v4l2_frmivalenum *f)
1080{
1081 struct sur40_state *sur40 = video_drvdata(file);
1082
1083 if ((f->index > 0) || ((f->pixel_format != V4L2_TCH_FMT_TU08)
1084 && (f->pixel_format != V4L2_PIX_FMT_GREY))
1085 || (f->width != sur40->pix_fmt.width)
1086 || (f->height != sur40->pix_fmt.height))
1087 return -EINVAL;
1088
1089 f->type = V4L2_FRMIVAL_TYPE_DISCRETE;
1090 f->discrete.denominator = 60;
1091 f->discrete.numerator = 1;
1092 return 0;
1093}
1094
1095
1096static const struct usb_device_id sur40_table[] = {
1097 { USB_DEVICE(ID_MICROSOFT, ID_SUR40) },
1098 { }
1099};
1100MODULE_DEVICE_TABLE(usb, sur40_table);
1101
1102
1103static const struct vb2_ops sur40_queue_ops = {
1104 .queue_setup = sur40_queue_setup,
1105 .buf_prepare = sur40_buffer_prepare,
1106 .buf_queue = sur40_buffer_queue,
1107 .start_streaming = sur40_start_streaming,
1108 .stop_streaming = sur40_stop_streaming,
1109 .wait_prepare = vb2_ops_wait_prepare,
1110 .wait_finish = vb2_ops_wait_finish,
1111};
1112
1113static const struct vb2_queue sur40_queue = {
1114 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1115
1116
1117
1118
1119
1120 .io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF,
1121 .buf_struct_size = sizeof(struct sur40_buffer),
1122 .ops = &sur40_queue_ops,
1123 .mem_ops = &vb2_dma_sg_memops,
1124 .timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC,
1125 .min_buffers_needed = 3,
1126};
1127
1128static const struct v4l2_file_operations sur40_video_fops = {
1129 .owner = THIS_MODULE,
1130 .open = v4l2_fh_open,
1131 .release = vb2_fop_release,
1132 .unlocked_ioctl = video_ioctl2,
1133 .read = vb2_fop_read,
1134 .mmap = vb2_fop_mmap,
1135 .poll = vb2_fop_poll,
1136};
1137
1138static const struct v4l2_ioctl_ops sur40_video_ioctl_ops = {
1139
1140 .vidioc_querycap = sur40_vidioc_querycap,
1141
1142 .vidioc_enum_fmt_vid_cap = sur40_vidioc_enum_fmt,
1143 .vidioc_try_fmt_vid_cap = sur40_vidioc_try_fmt,
1144 .vidioc_s_fmt_vid_cap = sur40_vidioc_s_fmt,
1145 .vidioc_g_fmt_vid_cap = sur40_vidioc_g_fmt,
1146
1147 .vidioc_enum_framesizes = sur40_vidioc_enum_framesizes,
1148 .vidioc_enum_frameintervals = sur40_vidioc_enum_frameintervals,
1149
1150 .vidioc_g_parm = sur40_ioctl_parm,
1151 .vidioc_s_parm = sur40_ioctl_parm,
1152
1153 .vidioc_enum_input = sur40_vidioc_enum_input,
1154 .vidioc_g_input = sur40_vidioc_g_input,
1155 .vidioc_s_input = sur40_vidioc_s_input,
1156
1157 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1158 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1159 .vidioc_querybuf = vb2_ioctl_querybuf,
1160 .vidioc_qbuf = vb2_ioctl_qbuf,
1161 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1162 .vidioc_expbuf = vb2_ioctl_expbuf,
1163
1164 .vidioc_streamon = vb2_ioctl_streamon,
1165 .vidioc_streamoff = vb2_ioctl_streamoff,
1166};
1167
1168static const struct video_device sur40_video_device = {
1169 .name = DRIVER_LONG,
1170 .fops = &sur40_video_fops,
1171 .ioctl_ops = &sur40_video_ioctl_ops,
1172 .release = video_device_release_empty,
1173 .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH |
1174 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING,
1175};
1176
1177
1178static struct usb_driver sur40_driver = {
1179 .name = DRIVER_SHORT,
1180 .probe = sur40_probe,
1181 .disconnect = sur40_disconnect,
1182 .id_table = sur40_table,
1183};
1184
1185module_usb_driver(sur40_driver);
1186
1187MODULE_AUTHOR(DRIVER_AUTHOR);
1188MODULE_DESCRIPTION(DRIVER_DESC);
1189MODULE_LICENSE("GPL");
1190