1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Surface2.0/SUR40/PixelSense input driver |
4 | * |
5 | * Copyright (c) 2014 by Florian 'floe' Echtler <floe@butterbrot.org> |
6 | * |
7 | * Derived from the USB Skeleton driver 1.1, |
8 | * Copyright (c) 2003 Greg Kroah-Hartman (greg@kroah.com) |
9 | * |
10 | * and from the Apple USB BCM5974 multitouch driver, |
11 | * Copyright (c) 2008 Henrik Rydberg (rydberg@euromail.se) |
12 | * |
13 | * and from the generic hid-multitouch driver, |
14 | * Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr> |
15 | * |
16 | * and from the v4l2-pci-skeleton driver, |
17 | * Copyright (c) Copyright 2014 Cisco Systems, Inc. |
18 | */ |
19 | |
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 | /* read 512 bytes from endpoint 0x86 -> get header + blobs */ |
42 | struct { |
43 | |
44 | __le16 ; /* always 0x0001 */ |
45 | __le16 ; /* count of blobs (if 0: continue prev. packet) */ |
46 | |
47 | __le32 ; /* unique ID for all packets in one frame */ |
48 | |
49 | __le32 ; /* milliseconds (inc. by 16 or 17 each frame) */ |
50 | __le32 ; /* "epoch?" always 02/03 00 00 00 */ |
51 | |
52 | } __packed; |
53 | |
54 | struct sur40_blob { |
55 | |
56 | __le16 blob_id; |
57 | |
58 | u8 action; /* 0x02 = enter/exit, 0x03 = update (?) */ |
59 | u8 type; /* bitmask (0x01 blob, 0x02 touch, 0x04 tag) */ |
60 | |
61 | __le16 bb_pos_x; /* upper left corner of bounding box */ |
62 | __le16 bb_pos_y; |
63 | |
64 | __le16 bb_size_x; /* size of bounding box */ |
65 | __le16 bb_size_y; |
66 | |
67 | __le16 pos_x; /* finger tip position */ |
68 | __le16 pos_y; |
69 | |
70 | __le16 ctr_x; /* centroid position */ |
71 | __le16 ctr_y; |
72 | |
73 | __le16 axis_x; /* somehow related to major/minor axis, mostly: */ |
74 | __le16 axis_y; /* axis_x == bb_size_y && axis_y == bb_size_x */ |
75 | |
76 | __le32 angle; /* orientation in radians relative to x axis - |
77 | actually an IEEE754 float, don't use in kernel */ |
78 | |
79 | __le32 area; /* size in pixels/pressure (?) */ |
80 | |
81 | u8 padding[24]; |
82 | |
83 | __le32 tag_id; /* valid when type == 0x04 (SUR40_TAG) */ |
84 | __le32 unknown; |
85 | |
86 | } __packed; |
87 | |
88 | /* combined header/blob data */ |
89 | struct sur40_data { |
90 | struct sur40_header ; |
91 | struct sur40_blob blobs[]; |
92 | } __packed; |
93 | |
94 | /* read 512 bytes from endpoint 0x82 -> get header below |
95 | * continue reading 16k blocks until header.size bytes read */ |
96 | struct { |
97 | __le32 ; /* "SUBF" */ |
98 | __le32 ; |
99 | __le32 ; /* always 0x0007e900 = 960x540 */ |
100 | __le32 ; /* milliseconds (increases by 16 or 17 each frame) */ |
101 | __le32 ; /* "epoch?" always 02/03 00 00 00 */ |
102 | } __packed; |
103 | |
104 | /* version information */ |
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 | /* vendor and device IDs */ |
111 | #define ID_MICROSOFT 0x045e |
112 | #define ID_SUR40 0x0775 |
113 | |
114 | /* sensor resolution */ |
115 | #define SENSOR_RES_X 1920 |
116 | #define SENSOR_RES_Y 1080 |
117 | |
118 | /* touch data endpoint */ |
119 | #define TOUCH_ENDPOINT 0x86 |
120 | |
121 | /* video data endpoint */ |
122 | #define VIDEO_ENDPOINT 0x82 |
123 | |
124 | /* video header fields */ |
125 | #define 0x46425553 |
126 | #define VIDEO_PACKET_SIZE 16384 |
127 | |
128 | /* polling interval (ms) */ |
129 | #define POLL_INTERVAL 1 |
130 | |
131 | /* maximum number of contacts FIXME: this is a guess? */ |
132 | #define MAX_CONTACTS 64 |
133 | |
134 | /* control commands */ |
135 | #define SUR40_GET_VERSION 0xb0 /* 12 bytes string */ |
136 | #define SUR40_ACCEL_CAPS 0xb3 /* 5 bytes */ |
137 | #define SUR40_SENSOR_CAPS 0xc1 /* 24 bytes */ |
138 | |
139 | #define SUR40_POKE 0xc5 /* poke register byte */ |
140 | #define SUR40_PEEK 0xc4 /* 48 bytes registers */ |
141 | |
142 | #define SUR40_GET_STATE 0xc5 /* 4 bytes state (?) */ |
143 | #define SUR40_GET_SENSORS 0xb1 /* 8 bytes sensors */ |
144 | |
145 | #define SUR40_BLOB 0x01 |
146 | #define SUR40_TOUCH 0x02 |
147 | #define SUR40_TAG 0x04 |
148 | |
149 | /* video controls */ |
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 | /* module parameters */ |
170 | static uint brightness = SUR40_BRIGHTNESS_DEF; |
171 | module_param(brightness, uint, 0644); |
172 | MODULE_PARM_DESC(brightness, "set initial brightness" |
173 | SUR40_PARAM_RANGE(SUR40_BRIGHTNESS_MIN, SUR40_BRIGHTNESS_MAX)); |
174 | static uint contrast = SUR40_CONTRAST_DEF; |
175 | module_param(contrast, uint, 0644); |
176 | MODULE_PARM_DESC(contrast, "set initial contrast" |
177 | SUR40_PARAM_RANGE(SUR40_CONTRAST_MIN, SUR40_CONTRAST_MAX)); |
178 | static uint gain = SUR40_GAIN_DEF; |
179 | module_param(gain, uint, 0644); |
180 | MODULE_PARM_DESC(gain, "set initial gain" |
181 | SUR40_PARAM_RANGE(SUR40_GAIN_MIN, SUR40_GAIN_MAX)); |
182 | |
183 | static 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 | /* master device state */ |
205 | struct 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 | |
230 | struct sur40_buffer { |
231 | struct vb2_v4l2_buffer vb; |
232 | struct list_head list; |
233 | }; |
234 | |
235 | /* forward declarations */ |
236 | static const struct video_device sur40_video_device; |
237 | static const struct vb2_queue sur40_queue; |
238 | static void sur40_process_video(struct sur40_state *sur40); |
239 | static int sur40_s_ctrl(struct v4l2_ctrl *ctrl); |
240 | |
241 | static const struct v4l2_ctrl_ops sur40_ctrl_ops = { |
242 | .s_ctrl = sur40_s_ctrl, |
243 | }; |
244 | |
245 | /* |
246 | * Note: an earlier, non-public version of this driver used USB_RECIP_ENDPOINT |
247 | * here by mistake which is very likely to have corrupted the firmware EEPROM |
248 | * on two separate SUR40 devices. Thanks to Alan Stern who spotted this bug. |
249 | * Should you ever run into a similar problem, the background story to this |
250 | * incident and instructions on how to fix the corrupted EEPROM are available |
251 | * at https://floe.butterbrot.org/matrix/hacking/surface/brick.html |
252 | */ |
253 | |
254 | /* command wrapper */ |
255 | static int sur40_command(struct sur40_state *dev, |
256 | u8 command, u16 index, void *buffer, u16 size) |
257 | { |
258 | return usb_control_msg(dev: dev->usbdev, usb_rcvctrlpipe(dev->usbdev, 0), |
259 | request: command, |
260 | USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, |
261 | value: 0x00, index, data: buffer, size, timeout: 1000); |
262 | } |
263 | |
264 | /* poke a byte in the panel register space */ |
265 | static int sur40_poke(struct sur40_state *dev, u8 offset, u8 value) |
266 | { |
267 | int result; |
268 | u8 index = 0x96; // 0xae for permanent write |
269 | |
270 | result = usb_control_msg(dev: dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0), |
271 | SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, |
272 | value: 0x32, index, NULL, size: 0, timeout: 1000); |
273 | if (result < 0) |
274 | goto error; |
275 | msleep(msecs: 5); |
276 | |
277 | result = usb_control_msg(dev: dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0), |
278 | SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, |
279 | value: 0x72, index: offset, NULL, size: 0, timeout: 1000); |
280 | if (result < 0) |
281 | goto error; |
282 | msleep(msecs: 5); |
283 | |
284 | result = usb_control_msg(dev: dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0), |
285 | SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, |
286 | value: 0xb2, index: value, NULL, size: 0, timeout: 1000); |
287 | if (result < 0) |
288 | goto error; |
289 | msleep(msecs: 5); |
290 | |
291 | error: |
292 | return result; |
293 | } |
294 | |
295 | static 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: dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0), |
305 | SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, |
306 | value: 0x07, index: setting_07[value], NULL, size: 0, timeout: 1000); |
307 | if (result < 0) |
308 | goto error; |
309 | msleep(msecs: 5); |
310 | |
311 | result = usb_control_msg(dev: dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0), |
312 | SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, |
313 | value: 0x17, index: setting_17[value], NULL, size: 0, timeout: 1000); |
314 | if (result < 0) |
315 | goto error; |
316 | msleep(msecs: 5); |
317 | |
318 | error: |
319 | return result; |
320 | } |
321 | |
322 | static 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(dev: handle, offset: 0x1c+i, value); |
328 | handle->vsvideo = value; |
329 | } |
330 | |
331 | static 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(dev: handle, offset: 0x08+(2*i), value); |
337 | } |
338 | |
339 | /* Initialization routine, called from sur40_open */ |
340 | static int sur40_init(struct sur40_state *dev) |
341 | { |
342 | int result; |
343 | u8 *buffer; |
344 | |
345 | buffer = kmalloc(size: 24, GFP_KERNEL); |
346 | if (!buffer) { |
347 | result = -ENOMEM; |
348 | goto error; |
349 | } |
350 | |
351 | /* stupidly replay the original MS driver init sequence */ |
352 | result = sur40_command(dev, SUR40_GET_VERSION, index: 0x00, buffer, size: 12); |
353 | if (result < 0) |
354 | goto error; |
355 | |
356 | result = sur40_command(dev, SUR40_GET_VERSION, index: 0x01, buffer, size: 12); |
357 | if (result < 0) |
358 | goto error; |
359 | |
360 | result = sur40_command(dev, SUR40_GET_VERSION, index: 0x02, buffer, size: 12); |
361 | if (result < 0) |
362 | goto error; |
363 | |
364 | result = sur40_command(dev, SUR40_SENSOR_CAPS, index: 0x00, buffer, size: 24); |
365 | if (result < 0) |
366 | goto error; |
367 | |
368 | result = sur40_command(dev, SUR40_ACCEL_CAPS, index: 0x00, buffer, size: 5); |
369 | if (result < 0) |
370 | goto error; |
371 | |
372 | result = sur40_command(dev, SUR40_GET_VERSION, index: 0x03, buffer, size: 12); |
373 | if (result < 0) |
374 | goto error; |
375 | |
376 | result = 0; |
377 | |
378 | /* |
379 | * Discard the result buffer - no known data inside except |
380 | * some version strings, maybe extract these sometime... |
381 | */ |
382 | error: |
383 | kfree(objp: buffer); |
384 | return result; |
385 | } |
386 | |
387 | /* |
388 | * Callback routines from input_dev |
389 | */ |
390 | |
391 | /* Enable the device, polling will now start. */ |
392 | static int sur40_open(struct input_dev *input) |
393 | { |
394 | struct sur40_state *sur40 = input_get_drvdata(dev: input); |
395 | |
396 | dev_dbg(sur40->dev, "open\n" ); |
397 | return sur40_init(dev: sur40); |
398 | } |
399 | |
400 | /* Disable device, polling has stopped. */ |
401 | static void sur40_close(struct input_dev *input) |
402 | { |
403 | struct sur40_state *sur40 = input_get_drvdata(dev: input); |
404 | |
405 | dev_dbg(sur40->dev, "close\n" ); |
406 | /* |
407 | * There is no known way to stop the device, so we simply |
408 | * stop polling. |
409 | */ |
410 | } |
411 | |
412 | /* |
413 | * This function is called when a whole contact has been processed, |
414 | * so that it can assign it to a slot and store the data there. |
415 | */ |
416 | static 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(dev: input, key: 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(dev: input, slot: slotnum); |
438 | input_mt_report_slot_state(dev: input, MT_TOOL_FINGER, active: 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(dev: input, ABS_MT_POSITION_X, value: pos_x); |
444 | input_report_abs(dev: input, ABS_MT_POSITION_Y, value: pos_y); |
445 | input_report_abs(dev: input, ABS_MT_TOOL_X, value: ctr_x); |
446 | input_report_abs(dev: input, ABS_MT_TOOL_Y, value: ctr_y); |
447 | |
448 | /* TODO: use a better orientation measure */ |
449 | input_report_abs(dev: input, ABS_MT_ORIENTATION, value: wide); |
450 | input_report_abs(dev: input, ABS_MT_TOUCH_MAJOR, value: major); |
451 | input_report_abs(dev: input, ABS_MT_TOUCH_MINOR, value: minor); |
452 | } |
453 | |
454 | /* core function: poll for new input data */ |
455 | static void sur40_poll(struct input_dev *input) |
456 | { |
457 | struct sur40_state *sur40 = input_get_drvdata(dev: input); |
458 | int result, bulk_read, need_blobs, packet_blobs, i; |
459 | struct sur40_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 | /* perform a blocking bulk read to get data from the device */ |
469 | result = usb_bulk_msg(usb_dev: sur40->usbdev, |
470 | usb_rcvbulkpipe(sur40->usbdev, sur40->bulk_in_epaddr), |
471 | data: sur40->bulk_in_buffer, len: sur40->bulk_in_size, |
472 | actual_length: &bulk_read, timeout: 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 | /* first packet? */ |
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 | /* packet_id = le32_to_cpu(header->packet_id); */ |
493 | } |
494 | |
495 | /* |
496 | * Sanity check. when video data is also being retrieved, the |
497 | * packet ID will usually increase in the middle of a series |
498 | * instead of at the end. However, the data is still consistent, |
499 | * so the packet ID is probably just valid for the first packet |
500 | * in a series. |
501 | |
502 | if (packet_id != le32_to_cpu(header->packet_id)) |
503 | dev_dbg(sur40->dev, "packet ID mismatch\n"); |
504 | */ |
505 | |
506 | packet_blobs = result / sizeof(struct sur40_blob); |
507 | dev_dbg(sur40->dev, "received %d blobs\n" , packet_blobs); |
508 | |
509 | /* packets always contain at least 4 blobs, even if empty */ |
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(blob: &(inblob[i]), input); |
517 | } |
518 | |
519 | } while (need_blobs > 0); |
520 | |
521 | input_mt_sync_frame(dev: input); |
522 | input_sync(dev: input); |
523 | |
524 | sur40_process_video(sur40); |
525 | } |
526 | |
527 | /* deal with video data */ |
528 | static 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(q: &sur40->queue)) |
538 | return; |
539 | |
540 | /* get a new buffer from the list */ |
541 | spin_lock(lock: &sur40->qlock); |
542 | if (list_empty(head: &sur40->buf_list)) { |
543 | dev_dbg(sur40->dev, "buffer queue empty\n" ); |
544 | spin_unlock(lock: &sur40->qlock); |
545 | return; |
546 | } |
547 | new_buf = list_entry(sur40->buf_list.next, struct sur40_buffer, list); |
548 | list_del(entry: &new_buf->list); |
549 | spin_unlock(lock: &sur40->qlock); |
550 | |
551 | dev_dbg(sur40->dev, "buffer acquired\n" ); |
552 | |
553 | /* retrieve data via bulk read */ |
554 | result = usb_bulk_msg(usb_dev: sur40->usbdev, |
555 | usb_rcvbulkpipe(sur40->usbdev, VIDEO_ENDPOINT), |
556 | data: sur40->bulk_in_buffer, len: sur40->bulk_in_size, |
557 | actual_length: &bulk_read, timeout: 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(vb: &new_buf->vb.vb2_buf, plane_no: 0); |
583 | |
584 | result = usb_sg_init(io: &sgr, dev: sur40->usbdev, |
585 | usb_rcvbulkpipe(sur40->usbdev, VIDEO_ENDPOINT), period: 0, |
586 | sg: sgt->sgl, nents: sgt->nents, length: sur40->pix_fmt.sizeimage, mem_flags: 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(io: &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 | /* return error if streaming was stopped in the meantime */ |
601 | if (sur40->sequence == -1) |
602 | return; |
603 | |
604 | /* mark as finished */ |
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(vb: &new_buf->vb.vb2_buf, state: VB2_BUF_STATE_DONE); |
609 | dev_dbg(sur40->dev, "buffer marked done\n" ); |
610 | return; |
611 | |
612 | err_poll: |
613 | vb2_buffer_done(vb: &new_buf->vb.vb2_buf, state: VB2_BUF_STATE_ERROR); |
614 | } |
615 | |
616 | /* Initialize input device parameters. */ |
617 | static int sur40_input_setup_events(struct input_dev *input_dev) |
618 | { |
619 | int error; |
620 | |
621 | input_set_abs_params(dev: input_dev, ABS_MT_POSITION_X, |
622 | min: 0, SENSOR_RES_X, fuzz: 0, flat: 0); |
623 | input_set_abs_params(dev: input_dev, ABS_MT_POSITION_Y, |
624 | min: 0, SENSOR_RES_Y, fuzz: 0, flat: 0); |
625 | |
626 | input_set_abs_params(dev: input_dev, ABS_MT_TOOL_X, |
627 | min: 0, SENSOR_RES_X, fuzz: 0, flat: 0); |
628 | input_set_abs_params(dev: input_dev, ABS_MT_TOOL_Y, |
629 | min: 0, SENSOR_RES_Y, fuzz: 0, flat: 0); |
630 | |
631 | /* max value unknown, but major/minor axis |
632 | * can never be larger than screen */ |
633 | input_set_abs_params(dev: input_dev, ABS_MT_TOUCH_MAJOR, |
634 | min: 0, SENSOR_RES_X, fuzz: 0, flat: 0); |
635 | input_set_abs_params(dev: input_dev, ABS_MT_TOUCH_MINOR, |
636 | min: 0, SENSOR_RES_Y, fuzz: 0, flat: 0); |
637 | |
638 | input_set_abs_params(dev: input_dev, ABS_MT_ORIENTATION, min: 0, max: 1, fuzz: 0, flat: 0); |
639 | |
640 | error = input_mt_init_slots(dev: 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 | /* Check candidate USB interface. */ |
651 | static 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 | /* Check if we really have the right interface. */ |
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 | /* Use endpoint #4 (0x86). */ |
670 | endpoint = &iface_desc->endpoint[4].desc; |
671 | if (endpoint->bEndpointAddress != TOUCH_ENDPOINT) |
672 | return -ENODEV; |
673 | |
674 | /* Allocate memory for our device state and initialize it. */ |
675 | sur40 = kzalloc(size: 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 | /* initialize locks/lists */ |
686 | INIT_LIST_HEAD(list: &sur40->buf_list); |
687 | spin_lock_init(&sur40->qlock); |
688 | mutex_init(&sur40->lock); |
689 | |
690 | /* Set up regular input device structure */ |
691 | input->name = DRIVER_LONG; |
692 | usb_to_input_id(dev: usbdev, id: &input->id); |
693 | usb_make_path(dev: usbdev, buf: sur40->phys, size: sizeof(sur40->phys)); |
694 | strlcat(p: sur40->phys, q: "/input0" , avail: 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_dev: input); |
702 | if (error) |
703 | goto err_free_input; |
704 | |
705 | input_set_drvdata(dev: input, data: sur40); |
706 | error = input_setup_polling(dev: input, poll_fn: 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(dev: input, POLL_INTERVAL); |
713 | |
714 | sur40->usbdev = usbdev; |
715 | sur40->dev = &interface->dev; |
716 | sur40->input = input; |
717 | |
718 | /* use the bulk-in endpoint tested above */ |
719 | sur40->bulk_in_size = usb_endpoint_maxp(epd: endpoint); |
720 | sur40->bulk_in_epaddr = endpoint->bEndpointAddress; |
721 | sur40->bulk_in_buffer = kmalloc(size: 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 | /* register the polled input device */ |
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 | /* register the video master device */ |
737 | snprintf(buf: sur40->v4l2.name, size: sizeof(sur40->v4l2.name), fmt: "%s" , DRIVER_LONG); |
738 | error = v4l2_device_register(dev: sur40->dev, v4l2_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 | /* initialize the lock and subdevice */ |
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 | /* initialize the queue */ |
752 | error = vb2_queue_init(q: &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(vdev: &sur40->vdev, data: sur40); |
762 | |
763 | /* initialize the control handler for 4 controls */ |
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(hdl: &sur40->hdl, ops: &sur40_ctrl_ops, V4L2_CID_BRIGHTNESS, |
769 | SUR40_BRIGHTNESS_MIN, SUR40_BRIGHTNESS_MAX, step: 1, clamp(brightness, |
770 | (uint)SUR40_BRIGHTNESS_MIN, (uint)SUR40_BRIGHTNESS_MAX)); |
771 | |
772 | v4l2_ctrl_new_std(hdl: &sur40->hdl, ops: &sur40_ctrl_ops, V4L2_CID_CONTRAST, |
773 | SUR40_CONTRAST_MIN, SUR40_CONTRAST_MAX, step: 1, clamp(contrast, |
774 | (uint)SUR40_CONTRAST_MIN, (uint)SUR40_CONTRAST_MAX)); |
775 | |
776 | v4l2_ctrl_new_std(hdl: &sur40->hdl, ops: &sur40_ctrl_ops, V4L2_CID_GAIN, |
777 | SUR40_GAIN_MIN, SUR40_GAIN_MAX, step: 1, clamp(gain, |
778 | (uint)SUR40_GAIN_MIN, (uint)SUR40_GAIN_MAX)); |
779 | |
780 | v4l2_ctrl_new_std(hdl: &sur40->hdl, ops: &sur40_ctrl_ops, |
781 | V4L2_CID_BACKLIGHT_COMPENSATION, SUR40_BACKLIGHT_MIN, |
782 | SUR40_BACKLIGHT_MAX, step: 1, SUR40_BACKLIGHT_DEF); |
783 | |
784 | v4l2_ctrl_handler_setup(hdl: &sur40->hdl); |
785 | |
786 | if (sur40->hdl.error) { |
787 | dev_err(&interface->dev, |
788 | "Unable to register video controls." ); |
789 | v4l2_ctrl_handler_free(hdl: &sur40->hdl); |
790 | error = sur40->hdl.error; |
791 | goto err_unreg_v4l2; |
792 | } |
793 | |
794 | error = video_register_device(vdev: &sur40->vdev, type: VFL_TYPE_TOUCH, nr: -1); |
795 | if (error) { |
796 | dev_err(&interface->dev, |
797 | "Unable to register video subdevice." ); |
798 | goto err_unreg_video; |
799 | } |
800 | |
801 | /* we can register the device now, as it is ready */ |
802 | usb_set_intfdata(intf: interface, data: sur40); |
803 | dev_dbg(&interface->dev, "%s is now attached\n" , DRIVER_DESC); |
804 | |
805 | return 0; |
806 | |
807 | err_unreg_video: |
808 | video_unregister_device(vdev: &sur40->vdev); |
809 | err_unreg_v4l2: |
810 | v4l2_device_unregister(v4l2_dev: &sur40->v4l2); |
811 | err_free_buffer: |
812 | kfree(objp: sur40->bulk_in_buffer); |
813 | err_free_input: |
814 | input_free_device(dev: input); |
815 | err_free_dev: |
816 | kfree(objp: sur40); |
817 | |
818 | return error; |
819 | } |
820 | |
821 | /* Unregister device & clean up. */ |
822 | static void sur40_disconnect(struct usb_interface *interface) |
823 | { |
824 | struct sur40_state *sur40 = usb_get_intfdata(intf: interface); |
825 | |
826 | v4l2_ctrl_handler_free(hdl: &sur40->hdl); |
827 | video_unregister_device(vdev: &sur40->vdev); |
828 | v4l2_device_unregister(v4l2_dev: &sur40->v4l2); |
829 | |
830 | input_unregister_device(sur40->input); |
831 | kfree(objp: sur40->bulk_in_buffer); |
832 | kfree(objp: sur40); |
833 | |
834 | usb_set_intfdata(intf: interface, NULL); |
835 | dev_dbg(&interface->dev, "%s is now disconnected\n" , DRIVER_DESC); |
836 | } |
837 | |
838 | /* |
839 | * Setup the constraints of the queue: besides setting the number of planes |
840 | * per buffer and the size and allocation context of each plane, it also |
841 | * checks if sufficient buffers have been allocated. Usually 3 is a good |
842 | * minimum number: many DMA engines need a minimum of 2 buffers in the |
843 | * queue and you need to have another available for userspace processing. |
844 | */ |
845 | static int sur40_queue_setup(struct vb2_queue *q, |
846 | unsigned int *nbuffers, unsigned int *nplanes, |
847 | unsigned int sizes[], struct device *alloc_devs[]) |
848 | { |
849 | struct sur40_state *sur40 = vb2_get_drv_priv(q); |
850 | |
851 | if (q->num_buffers + *nbuffers < 3) |
852 | *nbuffers = 3 - q->num_buffers; |
853 | |
854 | if (*nplanes) |
855 | return sizes[0] < sur40->pix_fmt.sizeimage ? -EINVAL : 0; |
856 | |
857 | *nplanes = 1; |
858 | sizes[0] = sur40->pix_fmt.sizeimage; |
859 | |
860 | return 0; |
861 | } |
862 | |
863 | /* |
864 | * Prepare the buffer for queueing to the DMA engine: check and set the |
865 | * payload size. |
866 | */ |
867 | static int sur40_buffer_prepare(struct vb2_buffer *vb) |
868 | { |
869 | struct sur40_state *sur40 = vb2_get_drv_priv(q: vb->vb2_queue); |
870 | unsigned long size = sur40->pix_fmt.sizeimage; |
871 | |
872 | if (vb2_plane_size(vb, plane_no: 0) < size) { |
873 | dev_err(&sur40->usbdev->dev, "buffer too small (%lu < %lu)\n" , |
874 | vb2_plane_size(vb, 0), size); |
875 | return -EINVAL; |
876 | } |
877 | |
878 | vb2_set_plane_payload(vb, plane_no: 0, size); |
879 | return 0; |
880 | } |
881 | |
882 | /* |
883 | * Queue this buffer to the DMA engine. |
884 | */ |
885 | static void sur40_buffer_queue(struct vb2_buffer *vb) |
886 | { |
887 | struct sur40_state *sur40 = vb2_get_drv_priv(q: vb->vb2_queue); |
888 | struct sur40_buffer *buf = (struct sur40_buffer *)vb; |
889 | |
890 | spin_lock(lock: &sur40->qlock); |
891 | list_add_tail(new: &buf->list, head: &sur40->buf_list); |
892 | spin_unlock(lock: &sur40->qlock); |
893 | } |
894 | |
895 | static void return_all_buffers(struct sur40_state *sur40, |
896 | enum vb2_buffer_state state) |
897 | { |
898 | struct sur40_buffer *buf, *node; |
899 | |
900 | spin_lock(lock: &sur40->qlock); |
901 | list_for_each_entry_safe(buf, node, &sur40->buf_list, list) { |
902 | vb2_buffer_done(vb: &buf->vb.vb2_buf, state); |
903 | list_del(entry: &buf->list); |
904 | } |
905 | spin_unlock(lock: &sur40->qlock); |
906 | } |
907 | |
908 | /* |
909 | * Start streaming. First check if the minimum number of buffers have been |
910 | * queued. If not, then return -ENOBUFS and the vb2 framework will call |
911 | * this function again the next time a buffer has been queued until enough |
912 | * buffers are available to actually start the DMA engine. |
913 | */ |
914 | static int sur40_start_streaming(struct vb2_queue *vq, unsigned int count) |
915 | { |
916 | struct sur40_state *sur40 = vb2_get_drv_priv(q: vq); |
917 | |
918 | sur40->sequence = 0; |
919 | return 0; |
920 | } |
921 | |
922 | /* |
923 | * Stop the DMA engine. Any remaining buffers in the DMA queue are dequeued |
924 | * and passed on to the vb2 framework marked as STATE_ERROR. |
925 | */ |
926 | static void sur40_stop_streaming(struct vb2_queue *vq) |
927 | { |
928 | struct sur40_state *sur40 = vb2_get_drv_priv(q: vq); |
929 | vb2_wait_for_all_buffers(q: vq); |
930 | sur40->sequence = -1; |
931 | |
932 | /* Release all active buffers */ |
933 | return_all_buffers(sur40, state: VB2_BUF_STATE_ERROR); |
934 | } |
935 | |
936 | /* V4L ioctl */ |
937 | static int sur40_vidioc_querycap(struct file *file, void *priv, |
938 | struct v4l2_capability *cap) |
939 | { |
940 | struct sur40_state *sur40 = video_drvdata(file); |
941 | |
942 | strscpy(p: cap->driver, DRIVER_SHORT, size: sizeof(cap->driver)); |
943 | strscpy(p: cap->card, DRIVER_LONG, size: sizeof(cap->card)); |
944 | usb_make_path(dev: sur40->usbdev, buf: cap->bus_info, size: sizeof(cap->bus_info)); |
945 | return 0; |
946 | } |
947 | |
948 | static int sur40_vidioc_enum_input(struct file *file, void *priv, |
949 | struct v4l2_input *i) |
950 | { |
951 | if (i->index != 0) |
952 | return -EINVAL; |
953 | i->type = V4L2_INPUT_TYPE_TOUCH; |
954 | i->std = V4L2_STD_UNKNOWN; |
955 | strscpy(p: i->name, q: "In-Cell Sensor" , size: sizeof(i->name)); |
956 | i->capabilities = 0; |
957 | return 0; |
958 | } |
959 | |
960 | static int sur40_vidioc_s_input(struct file *file, void *priv, unsigned int i) |
961 | { |
962 | return (i == 0) ? 0 : -EINVAL; |
963 | } |
964 | |
965 | static int sur40_vidioc_g_input(struct file *file, void *priv, unsigned int *i) |
966 | { |
967 | *i = 0; |
968 | return 0; |
969 | } |
970 | |
971 | static int sur40_vidioc_try_fmt(struct file *file, void *priv, |
972 | struct v4l2_format *f) |
973 | { |
974 | switch (f->fmt.pix.pixelformat) { |
975 | case V4L2_PIX_FMT_GREY: |
976 | f->fmt.pix = sur40_pix_format[1]; |
977 | break; |
978 | |
979 | default: |
980 | f->fmt.pix = sur40_pix_format[0]; |
981 | break; |
982 | } |
983 | |
984 | return 0; |
985 | } |
986 | |
987 | static int sur40_vidioc_s_fmt(struct file *file, void *priv, |
988 | struct v4l2_format *f) |
989 | { |
990 | struct sur40_state *sur40 = video_drvdata(file); |
991 | |
992 | switch (f->fmt.pix.pixelformat) { |
993 | case V4L2_PIX_FMT_GREY: |
994 | sur40->pix_fmt = sur40_pix_format[1]; |
995 | break; |
996 | |
997 | default: |
998 | sur40->pix_fmt = sur40_pix_format[0]; |
999 | break; |
1000 | } |
1001 | |
1002 | f->fmt.pix = sur40->pix_fmt; |
1003 | return 0; |
1004 | } |
1005 | |
1006 | static int sur40_vidioc_g_fmt(struct file *file, void *priv, |
1007 | struct v4l2_format *f) |
1008 | { |
1009 | struct sur40_state *sur40 = video_drvdata(file); |
1010 | |
1011 | f->fmt.pix = sur40->pix_fmt; |
1012 | return 0; |
1013 | } |
1014 | |
1015 | static int sur40_s_ctrl(struct v4l2_ctrl *ctrl) |
1016 | { |
1017 | struct sur40_state *sur40 = container_of(ctrl->handler, |
1018 | struct sur40_state, hdl); |
1019 | u8 value = sur40->vsvideo; |
1020 | |
1021 | switch (ctrl->id) { |
1022 | case V4L2_CID_BRIGHTNESS: |
1023 | sur40_set_irlevel(handle: sur40, value: ctrl->val); |
1024 | break; |
1025 | case V4L2_CID_CONTRAST: |
1026 | value = (value & 0x0f) | (ctrl->val << 4); |
1027 | sur40_set_vsvideo(handle: sur40, value); |
1028 | break; |
1029 | case V4L2_CID_GAIN: |
1030 | value = (value & 0xf0) | (ctrl->val); |
1031 | sur40_set_vsvideo(handle: sur40, value); |
1032 | break; |
1033 | case V4L2_CID_BACKLIGHT_COMPENSATION: |
1034 | sur40_set_preprocessor(dev: sur40, value: ctrl->val); |
1035 | break; |
1036 | } |
1037 | return 0; |
1038 | } |
1039 | |
1040 | static int sur40_ioctl_parm(struct file *file, void *priv, |
1041 | struct v4l2_streamparm *p) |
1042 | { |
1043 | if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1044 | return -EINVAL; |
1045 | |
1046 | p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; |
1047 | p->parm.capture.timeperframe.numerator = 1; |
1048 | p->parm.capture.timeperframe.denominator = 60; |
1049 | p->parm.capture.readbuffers = 3; |
1050 | return 0; |
1051 | } |
1052 | |
1053 | static int sur40_vidioc_enum_fmt(struct file *file, void *priv, |
1054 | struct v4l2_fmtdesc *f) |
1055 | { |
1056 | if (f->index >= ARRAY_SIZE(sur40_pix_format)) |
1057 | return -EINVAL; |
1058 | |
1059 | f->pixelformat = sur40_pix_format[f->index].pixelformat; |
1060 | f->flags = 0; |
1061 | return 0; |
1062 | } |
1063 | |
1064 | static int sur40_vidioc_enum_framesizes(struct file *file, void *priv, |
1065 | struct v4l2_frmsizeenum *f) |
1066 | { |
1067 | struct sur40_state *sur40 = video_drvdata(file); |
1068 | |
1069 | if ((f->index != 0) || ((f->pixel_format != V4L2_TCH_FMT_TU08) |
1070 | && (f->pixel_format != V4L2_PIX_FMT_GREY))) |
1071 | return -EINVAL; |
1072 | |
1073 | f->type = V4L2_FRMSIZE_TYPE_DISCRETE; |
1074 | f->discrete.width = sur40->pix_fmt.width; |
1075 | f->discrete.height = sur40->pix_fmt.height; |
1076 | return 0; |
1077 | } |
1078 | |
1079 | static int sur40_vidioc_enum_frameintervals(struct file *file, void *priv, |
1080 | struct v4l2_frmivalenum *f) |
1081 | { |
1082 | struct sur40_state *sur40 = video_drvdata(file); |
1083 | |
1084 | if ((f->index > 0) || ((f->pixel_format != V4L2_TCH_FMT_TU08) |
1085 | && (f->pixel_format != V4L2_PIX_FMT_GREY)) |
1086 | || (f->width != sur40->pix_fmt.width) |
1087 | || (f->height != sur40->pix_fmt.height)) |
1088 | return -EINVAL; |
1089 | |
1090 | f->type = V4L2_FRMIVAL_TYPE_DISCRETE; |
1091 | f->discrete.denominator = 60; |
1092 | f->discrete.numerator = 1; |
1093 | return 0; |
1094 | } |
1095 | |
1096 | |
1097 | static const struct usb_device_id sur40_table[] = { |
1098 | { USB_DEVICE(ID_MICROSOFT, ID_SUR40) }, /* Samsung SUR40 */ |
1099 | { } /* terminating null entry */ |
1100 | }; |
1101 | MODULE_DEVICE_TABLE(usb, sur40_table); |
1102 | |
1103 | /* V4L2 structures */ |
1104 | static const struct vb2_ops sur40_queue_ops = { |
1105 | .queue_setup = sur40_queue_setup, |
1106 | .buf_prepare = sur40_buffer_prepare, |
1107 | .buf_queue = sur40_buffer_queue, |
1108 | .start_streaming = sur40_start_streaming, |
1109 | .stop_streaming = sur40_stop_streaming, |
1110 | .wait_prepare = vb2_ops_wait_prepare, |
1111 | .wait_finish = vb2_ops_wait_finish, |
1112 | }; |
1113 | |
1114 | static const struct vb2_queue sur40_queue = { |
1115 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, |
1116 | /* |
1117 | * VB2_USERPTR in currently not enabled: passing a user pointer to |
1118 | * dma-sg will result in segment sizes that are not a multiple of |
1119 | * 512 bytes, which is required by the host controller. |
1120 | */ |
1121 | .io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF, |
1122 | .buf_struct_size = sizeof(struct sur40_buffer), |
1123 | .ops = &sur40_queue_ops, |
1124 | .mem_ops = &vb2_dma_sg_memops, |
1125 | .timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC, |
1126 | .min_buffers_needed = 3, |
1127 | }; |
1128 | |
1129 | static const struct v4l2_file_operations sur40_video_fops = { |
1130 | .owner = THIS_MODULE, |
1131 | .open = v4l2_fh_open, |
1132 | .release = vb2_fop_release, |
1133 | .unlocked_ioctl = video_ioctl2, |
1134 | .read = vb2_fop_read, |
1135 | .mmap = vb2_fop_mmap, |
1136 | .poll = vb2_fop_poll, |
1137 | }; |
1138 | |
1139 | static const struct v4l2_ioctl_ops sur40_video_ioctl_ops = { |
1140 | |
1141 | .vidioc_querycap = sur40_vidioc_querycap, |
1142 | |
1143 | .vidioc_enum_fmt_vid_cap = sur40_vidioc_enum_fmt, |
1144 | .vidioc_try_fmt_vid_cap = sur40_vidioc_try_fmt, |
1145 | .vidioc_s_fmt_vid_cap = sur40_vidioc_s_fmt, |
1146 | .vidioc_g_fmt_vid_cap = sur40_vidioc_g_fmt, |
1147 | |
1148 | .vidioc_enum_framesizes = sur40_vidioc_enum_framesizes, |
1149 | .vidioc_enum_frameintervals = sur40_vidioc_enum_frameintervals, |
1150 | |
1151 | .vidioc_g_parm = sur40_ioctl_parm, |
1152 | .vidioc_s_parm = sur40_ioctl_parm, |
1153 | |
1154 | .vidioc_enum_input = sur40_vidioc_enum_input, |
1155 | .vidioc_g_input = sur40_vidioc_g_input, |
1156 | .vidioc_s_input = sur40_vidioc_s_input, |
1157 | |
1158 | .vidioc_reqbufs = vb2_ioctl_reqbufs, |
1159 | .vidioc_create_bufs = vb2_ioctl_create_bufs, |
1160 | .vidioc_querybuf = vb2_ioctl_querybuf, |
1161 | .vidioc_qbuf = vb2_ioctl_qbuf, |
1162 | .vidioc_dqbuf = vb2_ioctl_dqbuf, |
1163 | .vidioc_expbuf = vb2_ioctl_expbuf, |
1164 | |
1165 | .vidioc_streamon = vb2_ioctl_streamon, |
1166 | .vidioc_streamoff = vb2_ioctl_streamoff, |
1167 | }; |
1168 | |
1169 | static const struct video_device sur40_video_device = { |
1170 | .name = DRIVER_LONG, |
1171 | .fops = &sur40_video_fops, |
1172 | .ioctl_ops = &sur40_video_ioctl_ops, |
1173 | .release = video_device_release_empty, |
1174 | .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH | |
1175 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING, |
1176 | }; |
1177 | |
1178 | /* USB-specific object needed to register this driver with the USB subsystem. */ |
1179 | static struct usb_driver sur40_driver = { |
1180 | .name = DRIVER_SHORT, |
1181 | .probe = sur40_probe, |
1182 | .disconnect = sur40_disconnect, |
1183 | .id_table = sur40_table, |
1184 | }; |
1185 | |
1186 | module_usb_driver(sur40_driver); |
1187 | |
1188 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1189 | MODULE_DESCRIPTION(DRIVER_DESC); |
1190 | MODULE_LICENSE("GPL" ); |
1191 | |