Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Surface2.0/SUR40/PixelSense input driver |
| 3 | * |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 4 | * Copyright (c) 2014 by Florian 'floe' Echtler <floe@butterbrot.org> |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 5 | * |
| 6 | * Derived from the USB Skeleton driver 1.1, |
| 7 | * Copyright (c) 2003 Greg Kroah-Hartman (greg@kroah.com) |
| 8 | * |
| 9 | * and from the Apple USB BCM5974 multitouch driver, |
| 10 | * Copyright (c) 2008 Henrik Rydberg (rydberg@euromail.se) |
| 11 | * |
| 12 | * and from the generic hid-multitouch driver, |
| 13 | * Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr> |
| 14 | * |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 15 | * and from the v4l2-pci-skeleton driver, |
| 16 | * Copyright (c) Copyright 2014 Cisco Systems, Inc. |
| 17 | * |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 18 | * This program is free software; you can redistribute it and/or |
| 19 | * modify it under the terms of the GNU General Public License as |
| 20 | * published by the Free Software Foundation; either version 2 of |
| 21 | * the License, or (at your option) any later version. |
| 22 | */ |
| 23 | |
| 24 | #include <linux/kernel.h> |
| 25 | #include <linux/errno.h> |
| 26 | #include <linux/delay.h> |
| 27 | #include <linux/init.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/completion.h> |
| 31 | #include <linux/uaccess.h> |
| 32 | #include <linux/usb.h> |
| 33 | #include <linux/printk.h> |
| 34 | #include <linux/input-polldev.h> |
| 35 | #include <linux/input/mt.h> |
| 36 | #include <linux/usb/input.h> |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 37 | #include <linux/videodev2.h> |
| 38 | #include <media/v4l2-device.h> |
| 39 | #include <media/v4l2-dev.h> |
| 40 | #include <media/v4l2-ioctl.h> |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 41 | #include <media/videobuf2-v4l2.h> |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 42 | #include <media/videobuf2-dma-sg.h> |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 43 | |
| 44 | /* read 512 bytes from endpoint 0x86 -> get header + blobs */ |
| 45 | struct sur40_header { |
| 46 | |
| 47 | __le16 type; /* always 0x0001 */ |
| 48 | __le16 count; /* count of blobs (if 0: continue prev. packet) */ |
| 49 | |
| 50 | __le32 packet_id; /* unique ID for all packets in one frame */ |
| 51 | |
| 52 | __le32 timestamp; /* milliseconds (inc. by 16 or 17 each frame) */ |
| 53 | __le32 unknown; /* "epoch?" always 02/03 00 00 00 */ |
| 54 | |
| 55 | } __packed; |
| 56 | |
| 57 | struct sur40_blob { |
| 58 | |
| 59 | __le16 blob_id; |
| 60 | |
| 61 | u8 action; /* 0x02 = enter/exit, 0x03 = update (?) */ |
| 62 | u8 unknown; /* always 0x01 or 0x02 (no idea what this is?) */ |
| 63 | |
| 64 | __le16 bb_pos_x; /* upper left corner of bounding box */ |
| 65 | __le16 bb_pos_y; |
| 66 | |
| 67 | __le16 bb_size_x; /* size of bounding box */ |
| 68 | __le16 bb_size_y; |
| 69 | |
| 70 | __le16 pos_x; /* finger tip position */ |
| 71 | __le16 pos_y; |
| 72 | |
| 73 | __le16 ctr_x; /* centroid position */ |
| 74 | __le16 ctr_y; |
| 75 | |
| 76 | __le16 axis_x; /* somehow related to major/minor axis, mostly: */ |
| 77 | __le16 axis_y; /* axis_x == bb_size_y && axis_y == bb_size_x */ |
| 78 | |
| 79 | __le32 angle; /* orientation in radians relative to x axis - |
| 80 | actually an IEEE754 float, don't use in kernel */ |
| 81 | |
| 82 | __le32 area; /* size in pixels/pressure (?) */ |
| 83 | |
| 84 | u8 padding[32]; |
| 85 | |
| 86 | } __packed; |
| 87 | |
| 88 | /* combined header/blob data */ |
| 89 | struct sur40_data { |
| 90 | struct sur40_header header; |
| 91 | struct sur40_blob blobs[]; |
| 92 | } __packed; |
| 93 | |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 94 | /* read 512 bytes from endpoint 0x82 -> get header below |
| 95 | * continue reading 16k blocks until header.size bytes read */ |
| 96 | struct sur40_image_header { |
| 97 | __le32 magic; /* "SUBF" */ |
| 98 | __le32 packet_id; |
| 99 | __le32 size; /* always 0x0007e900 = 960x540 */ |
| 100 | __le32 timestamp; /* milliseconds (increases by 16 or 17 each frame) */ |
| 101 | __le32 unknown; /* "epoch?" always 02/03 00 00 00 */ |
| 102 | } __packed; |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 103 | |
| 104 | /* version information */ |
| 105 | #define DRIVER_SHORT "sur40" |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 106 | #define DRIVER_LONG "Samsung SUR40" |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 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 | |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 121 | /* video data endpoint */ |
| 122 | #define VIDEO_ENDPOINT 0x82 |
| 123 | |
| 124 | /* video header fields */ |
| 125 | #define VIDEO_HEADER_MAGIC 0x46425553 |
| 126 | #define VIDEO_PACKET_SIZE 16384 |
| 127 | |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 128 | /* polling interval (ms) */ |
Florian Echtler | ca27ab3 | 2015-05-25 09:04:13 -0300 | [diff] [blame] | 129 | #define POLL_INTERVAL 4 |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 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_UNKNOWN1 0xb3 /* 5 bytes */ |
| 137 | #define SUR40_UNKNOWN2 0xc1 /* 24 bytes */ |
| 138 | |
| 139 | #define SUR40_GET_STATE 0xc5 /* 4 bytes state (?) */ |
| 140 | #define SUR40_GET_SENSORS 0xb1 /* 8 bytes sensors */ |
| 141 | |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 142 | /* master device state */ |
| 143 | struct sur40_state { |
| 144 | |
| 145 | struct usb_device *usbdev; |
| 146 | struct device *dev; |
| 147 | struct input_polled_dev *input; |
| 148 | |
| 149 | struct v4l2_device v4l2; |
| 150 | struct video_device vdev; |
| 151 | struct mutex lock; |
| 152 | |
| 153 | struct vb2_queue queue; |
| 154 | struct vb2_alloc_ctx *alloc_ctx; |
| 155 | struct list_head buf_list; |
| 156 | spinlock_t qlock; |
| 157 | int sequence; |
| 158 | |
| 159 | struct sur40_data *bulk_in_buffer; |
| 160 | size_t bulk_in_size; |
| 161 | u8 bulk_in_epaddr; |
| 162 | |
| 163 | char phys[64]; |
| 164 | }; |
| 165 | |
| 166 | struct sur40_buffer { |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 167 | struct vb2_v4l2_buffer vb; |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 168 | struct list_head list; |
| 169 | }; |
| 170 | |
| 171 | /* forward declarations */ |
| 172 | static const struct video_device sur40_video_device; |
| 173 | static const struct v4l2_pix_format sur40_video_format; |
| 174 | static const struct vb2_queue sur40_queue; |
| 175 | static void sur40_process_video(struct sur40_state *sur40); |
| 176 | |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 177 | /* |
| 178 | * Note: an earlier, non-public version of this driver used USB_RECIP_ENDPOINT |
| 179 | * here by mistake which is very likely to have corrupted the firmware EEPROM |
| 180 | * on two separate SUR40 devices. Thanks to Alan Stern who spotted this bug. |
| 181 | * Should you ever run into a similar problem, the background story to this |
| 182 | * incident and instructions on how to fix the corrupted EEPROM are available |
| 183 | * at https://floe.butterbrot.org/matrix/hacking/surface/brick.html |
| 184 | */ |
| 185 | |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 186 | /* command wrapper */ |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 187 | static int sur40_command(struct sur40_state *dev, |
| 188 | u8 command, u16 index, void *buffer, u16 size) |
| 189 | { |
| 190 | return usb_control_msg(dev->usbdev, usb_rcvctrlpipe(dev->usbdev, 0), |
| 191 | command, |
| 192 | USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, |
| 193 | 0x00, index, buffer, size, 1000); |
| 194 | } |
| 195 | |
| 196 | /* Initialization routine, called from sur40_open */ |
| 197 | static int sur40_init(struct sur40_state *dev) |
| 198 | { |
| 199 | int result; |
Oliver Neukum | d314e9e | 2016-03-23 14:36:56 -0700 | [diff] [blame] | 200 | u8 *buffer; |
| 201 | |
| 202 | buffer = kmalloc(24, GFP_KERNEL); |
| 203 | if (!buffer) { |
| 204 | result = -ENOMEM; |
| 205 | goto error; |
| 206 | } |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 207 | |
| 208 | /* stupidly replay the original MS driver init sequence */ |
| 209 | result = sur40_command(dev, SUR40_GET_VERSION, 0x00, buffer, 12); |
| 210 | if (result < 0) |
Oliver Neukum | d314e9e | 2016-03-23 14:36:56 -0700 | [diff] [blame] | 211 | goto error; |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 212 | |
| 213 | result = sur40_command(dev, SUR40_GET_VERSION, 0x01, buffer, 12); |
| 214 | if (result < 0) |
Oliver Neukum | d314e9e | 2016-03-23 14:36:56 -0700 | [diff] [blame] | 215 | goto error; |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 216 | |
| 217 | result = sur40_command(dev, SUR40_GET_VERSION, 0x02, buffer, 12); |
| 218 | if (result < 0) |
Oliver Neukum | d314e9e | 2016-03-23 14:36:56 -0700 | [diff] [blame] | 219 | goto error; |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 220 | |
| 221 | result = sur40_command(dev, SUR40_UNKNOWN2, 0x00, buffer, 24); |
| 222 | if (result < 0) |
Oliver Neukum | d314e9e | 2016-03-23 14:36:56 -0700 | [diff] [blame] | 223 | goto error; |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 224 | |
| 225 | result = sur40_command(dev, SUR40_UNKNOWN1, 0x00, buffer, 5); |
| 226 | if (result < 0) |
Oliver Neukum | d314e9e | 2016-03-23 14:36:56 -0700 | [diff] [blame] | 227 | goto error; |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 228 | |
| 229 | result = sur40_command(dev, SUR40_GET_VERSION, 0x03, buffer, 12); |
| 230 | |
| 231 | /* |
| 232 | * Discard the result buffer - no known data inside except |
| 233 | * some version strings, maybe extract these sometime... |
| 234 | */ |
Oliver Neukum | d314e9e | 2016-03-23 14:36:56 -0700 | [diff] [blame] | 235 | error: |
| 236 | kfree(buffer); |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 237 | return result; |
| 238 | } |
| 239 | |
| 240 | /* |
| 241 | * Callback routines from input_polled_dev |
| 242 | */ |
| 243 | |
| 244 | /* Enable the device, polling will now start. */ |
| 245 | static void sur40_open(struct input_polled_dev *polldev) |
| 246 | { |
| 247 | struct sur40_state *sur40 = polldev->private; |
| 248 | |
| 249 | dev_dbg(sur40->dev, "open\n"); |
| 250 | sur40_init(sur40); |
| 251 | } |
| 252 | |
| 253 | /* Disable device, polling has stopped. */ |
| 254 | static void sur40_close(struct input_polled_dev *polldev) |
| 255 | { |
| 256 | struct sur40_state *sur40 = polldev->private; |
| 257 | |
| 258 | dev_dbg(sur40->dev, "close\n"); |
| 259 | /* |
| 260 | * There is no known way to stop the device, so we simply |
| 261 | * stop polling. |
| 262 | */ |
| 263 | } |
| 264 | |
| 265 | /* |
| 266 | * This function is called when a whole contact has been processed, |
| 267 | * so that it can assign it to a slot and store the data there. |
| 268 | */ |
| 269 | static void sur40_report_blob(struct sur40_blob *blob, struct input_dev *input) |
| 270 | { |
| 271 | int wide, major, minor; |
| 272 | |
| 273 | int bb_size_x = le16_to_cpu(blob->bb_size_x); |
| 274 | int bb_size_y = le16_to_cpu(blob->bb_size_y); |
| 275 | |
| 276 | int pos_x = le16_to_cpu(blob->pos_x); |
| 277 | int pos_y = le16_to_cpu(blob->pos_y); |
| 278 | |
| 279 | int ctr_x = le16_to_cpu(blob->ctr_x); |
| 280 | int ctr_y = le16_to_cpu(blob->ctr_y); |
| 281 | |
| 282 | int slotnum = input_mt_get_slot_by_key(input, blob->blob_id); |
| 283 | if (slotnum < 0 || slotnum >= MAX_CONTACTS) |
| 284 | return; |
| 285 | |
| 286 | input_mt_slot(input, slotnum); |
| 287 | input_mt_report_slot_state(input, MT_TOOL_FINGER, 1); |
| 288 | wide = (bb_size_x > bb_size_y); |
| 289 | major = max(bb_size_x, bb_size_y); |
| 290 | minor = min(bb_size_x, bb_size_y); |
| 291 | |
| 292 | input_report_abs(input, ABS_MT_POSITION_X, pos_x); |
| 293 | input_report_abs(input, ABS_MT_POSITION_Y, pos_y); |
| 294 | input_report_abs(input, ABS_MT_TOOL_X, ctr_x); |
| 295 | input_report_abs(input, ABS_MT_TOOL_Y, ctr_y); |
| 296 | |
| 297 | /* TODO: use a better orientation measure */ |
| 298 | input_report_abs(input, ABS_MT_ORIENTATION, wide); |
| 299 | input_report_abs(input, ABS_MT_TOUCH_MAJOR, major); |
| 300 | input_report_abs(input, ABS_MT_TOUCH_MINOR, minor); |
| 301 | } |
| 302 | |
| 303 | /* core function: poll for new input data */ |
| 304 | static void sur40_poll(struct input_polled_dev *polldev) |
| 305 | { |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 306 | struct sur40_state *sur40 = polldev->private; |
| 307 | struct input_dev *input = polldev->input; |
| 308 | int result, bulk_read, need_blobs, packet_blobs, i; |
Dmitry Torokhov | b884eb8 | 2013-11-26 11:03:57 -0800 | [diff] [blame] | 309 | u32 uninitialized_var(packet_id); |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 310 | |
| 311 | struct sur40_header *header = &sur40->bulk_in_buffer->header; |
| 312 | struct sur40_blob *inblob = &sur40->bulk_in_buffer->blobs[0]; |
| 313 | |
| 314 | dev_dbg(sur40->dev, "poll\n"); |
| 315 | |
| 316 | need_blobs = -1; |
| 317 | |
| 318 | do { |
| 319 | |
| 320 | /* perform a blocking bulk read to get data from the device */ |
| 321 | result = usb_bulk_msg(sur40->usbdev, |
| 322 | usb_rcvbulkpipe(sur40->usbdev, sur40->bulk_in_epaddr), |
| 323 | sur40->bulk_in_buffer, sur40->bulk_in_size, |
| 324 | &bulk_read, 1000); |
| 325 | |
| 326 | dev_dbg(sur40->dev, "received %d bytes\n", bulk_read); |
| 327 | |
| 328 | if (result < 0) { |
| 329 | dev_err(sur40->dev, "error in usb_bulk_read\n"); |
| 330 | return; |
| 331 | } |
| 332 | |
| 333 | result = bulk_read - sizeof(struct sur40_header); |
| 334 | |
| 335 | if (result % sizeof(struct sur40_blob) != 0) { |
| 336 | dev_err(sur40->dev, "transfer size mismatch\n"); |
| 337 | return; |
| 338 | } |
| 339 | |
| 340 | /* first packet? */ |
| 341 | if (need_blobs == -1) { |
| 342 | need_blobs = le16_to_cpu(header->count); |
| 343 | dev_dbg(sur40->dev, "need %d blobs\n", need_blobs); |
Dmitry Torokhov | b884eb8 | 2013-11-26 11:03:57 -0800 | [diff] [blame] | 344 | packet_id = le32_to_cpu(header->packet_id); |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | /* |
| 348 | * Sanity check. when video data is also being retrieved, the |
| 349 | * packet ID will usually increase in the middle of a series |
| 350 | * instead of at the end. |
| 351 | */ |
| 352 | if (packet_id != header->packet_id) |
Florian Echtler | 0cfdfcc | 2015-05-25 09:04:15 -0300 | [diff] [blame] | 353 | dev_dbg(sur40->dev, "packet ID mismatch\n"); |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 354 | |
| 355 | packet_blobs = result / sizeof(struct sur40_blob); |
| 356 | dev_dbg(sur40->dev, "received %d blobs\n", packet_blobs); |
| 357 | |
| 358 | /* packets always contain at least 4 blobs, even if empty */ |
| 359 | if (packet_blobs > need_blobs) |
| 360 | packet_blobs = need_blobs; |
| 361 | |
| 362 | for (i = 0; i < packet_blobs; i++) { |
| 363 | need_blobs--; |
| 364 | dev_dbg(sur40->dev, "processing blob\n"); |
| 365 | sur40_report_blob(&(inblob[i]), input); |
| 366 | } |
| 367 | |
| 368 | } while (need_blobs > 0); |
| 369 | |
| 370 | input_mt_sync_frame(input); |
| 371 | input_sync(input); |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 372 | |
| 373 | sur40_process_video(sur40); |
| 374 | } |
| 375 | |
| 376 | /* deal with video data */ |
| 377 | static void sur40_process_video(struct sur40_state *sur40) |
| 378 | { |
| 379 | |
| 380 | struct sur40_image_header *img = (void *)(sur40->bulk_in_buffer); |
| 381 | struct sur40_buffer *new_buf; |
| 382 | struct usb_sg_request sgr; |
| 383 | struct sg_table *sgt; |
| 384 | int result, bulk_read; |
| 385 | |
| 386 | if (!vb2_start_streaming_called(&sur40->queue)) |
| 387 | return; |
| 388 | |
| 389 | /* get a new buffer from the list */ |
| 390 | spin_lock(&sur40->qlock); |
Florian Echtler | c252990 | 2015-03-31 06:43:28 -0300 | [diff] [blame] | 391 | if (list_empty(&sur40->buf_list)) { |
| 392 | dev_dbg(sur40->dev, "buffer queue empty\n"); |
| 393 | spin_unlock(&sur40->qlock); |
| 394 | return; |
| 395 | } |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 396 | new_buf = list_entry(sur40->buf_list.next, struct sur40_buffer, list); |
| 397 | list_del(&new_buf->list); |
| 398 | spin_unlock(&sur40->qlock); |
| 399 | |
Florian Echtler | 0cfdfcc | 2015-05-25 09:04:15 -0300 | [diff] [blame] | 400 | dev_dbg(sur40->dev, "buffer acquired\n"); |
| 401 | |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 402 | /* retrieve data via bulk read */ |
| 403 | result = usb_bulk_msg(sur40->usbdev, |
| 404 | usb_rcvbulkpipe(sur40->usbdev, VIDEO_ENDPOINT), |
| 405 | sur40->bulk_in_buffer, sur40->bulk_in_size, |
| 406 | &bulk_read, 1000); |
| 407 | |
| 408 | if (result < 0) { |
| 409 | dev_err(sur40->dev, "error in usb_bulk_read\n"); |
| 410 | goto err_poll; |
| 411 | } |
| 412 | |
| 413 | if (bulk_read != sizeof(struct sur40_image_header)) { |
| 414 | dev_err(sur40->dev, "received %d bytes (%zd expected)\n", |
| 415 | bulk_read, sizeof(struct sur40_image_header)); |
| 416 | goto err_poll; |
| 417 | } |
| 418 | |
| 419 | if (le32_to_cpu(img->magic) != VIDEO_HEADER_MAGIC) { |
| 420 | dev_err(sur40->dev, "image magic mismatch\n"); |
| 421 | goto err_poll; |
| 422 | } |
| 423 | |
| 424 | if (le32_to_cpu(img->size) != sur40_video_format.sizeimage) { |
| 425 | dev_err(sur40->dev, "image size mismatch\n"); |
| 426 | goto err_poll; |
| 427 | } |
| 428 | |
Florian Echtler | 0cfdfcc | 2015-05-25 09:04:15 -0300 | [diff] [blame] | 429 | dev_dbg(sur40->dev, "header acquired\n"); |
| 430 | |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 431 | sgt = vb2_dma_sg_plane_desc(&new_buf->vb.vb2_buf, 0); |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 432 | |
| 433 | result = usb_sg_init(&sgr, sur40->usbdev, |
| 434 | usb_rcvbulkpipe(sur40->usbdev, VIDEO_ENDPOINT), 0, |
| 435 | sgt->sgl, sgt->nents, sur40_video_format.sizeimage, 0); |
| 436 | if (result < 0) { |
| 437 | dev_err(sur40->dev, "error %d in usb_sg_init\n", result); |
| 438 | goto err_poll; |
| 439 | } |
| 440 | |
| 441 | usb_sg_wait(&sgr); |
| 442 | if (sgr.status < 0) { |
| 443 | dev_err(sur40->dev, "error %d in usb_sg_wait\n", sgr.status); |
| 444 | goto err_poll; |
| 445 | } |
| 446 | |
Florian Echtler | 0cfdfcc | 2015-05-25 09:04:15 -0300 | [diff] [blame] | 447 | dev_dbg(sur40->dev, "image acquired\n"); |
| 448 | |
Florian Echtler | 2b7eea8 | 2015-05-25 09:04:16 -0300 | [diff] [blame] | 449 | /* return error if streaming was stopped in the meantime */ |
| 450 | if (sur40->sequence == -1) |
| 451 | goto err_poll; |
| 452 | |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 453 | /* mark as finished */ |
Junghak Sung | d6dd645 | 2015-11-03 08:16:37 -0200 | [diff] [blame] | 454 | new_buf->vb.vb2_buf.timestamp = ktime_get_ns(); |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 455 | new_buf->vb.sequence = sur40->sequence++; |
| 456 | new_buf->vb.field = V4L2_FIELD_NONE; |
| 457 | vb2_buffer_done(&new_buf->vb.vb2_buf, VB2_BUF_STATE_DONE); |
Florian Echtler | 0cfdfcc | 2015-05-25 09:04:15 -0300 | [diff] [blame] | 458 | dev_dbg(sur40->dev, "buffer marked done\n"); |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 459 | return; |
| 460 | |
| 461 | err_poll: |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 462 | vb2_buffer_done(&new_buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 463 | } |
| 464 | |
| 465 | /* Initialize input device parameters. */ |
| 466 | static void sur40_input_setup(struct input_dev *input_dev) |
| 467 | { |
| 468 | __set_bit(EV_KEY, input_dev->evbit); |
| 469 | __set_bit(EV_ABS, input_dev->evbit); |
| 470 | |
| 471 | input_set_abs_params(input_dev, ABS_MT_POSITION_X, |
| 472 | 0, SENSOR_RES_X, 0, 0); |
| 473 | input_set_abs_params(input_dev, ABS_MT_POSITION_Y, |
| 474 | 0, SENSOR_RES_Y, 0, 0); |
| 475 | |
| 476 | input_set_abs_params(input_dev, ABS_MT_TOOL_X, |
| 477 | 0, SENSOR_RES_X, 0, 0); |
| 478 | input_set_abs_params(input_dev, ABS_MT_TOOL_Y, |
| 479 | 0, SENSOR_RES_Y, 0, 0); |
| 480 | |
| 481 | /* max value unknown, but major/minor axis |
| 482 | * can never be larger than screen */ |
| 483 | input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, |
| 484 | 0, SENSOR_RES_X, 0, 0); |
| 485 | input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, |
| 486 | 0, SENSOR_RES_Y, 0, 0); |
| 487 | |
| 488 | input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0); |
| 489 | |
| 490 | input_mt_init_slots(input_dev, MAX_CONTACTS, |
| 491 | INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); |
| 492 | } |
| 493 | |
| 494 | /* Check candidate USB interface. */ |
| 495 | static int sur40_probe(struct usb_interface *interface, |
| 496 | const struct usb_device_id *id) |
| 497 | { |
| 498 | struct usb_device *usbdev = interface_to_usbdev(interface); |
| 499 | struct sur40_state *sur40; |
| 500 | struct usb_host_interface *iface_desc; |
| 501 | struct usb_endpoint_descriptor *endpoint; |
| 502 | struct input_polled_dev *poll_dev; |
| 503 | int error; |
| 504 | |
| 505 | /* Check if we really have the right interface. */ |
| 506 | iface_desc = &interface->altsetting[0]; |
| 507 | if (iface_desc->desc.bInterfaceClass != 0xFF) |
| 508 | return -ENODEV; |
| 509 | |
| 510 | /* Use endpoint #4 (0x86). */ |
| 511 | endpoint = &iface_desc->endpoint[4].desc; |
| 512 | if (endpoint->bEndpointAddress != TOUCH_ENDPOINT) |
| 513 | return -ENODEV; |
| 514 | |
| 515 | /* Allocate memory for our device state and initialize it. */ |
| 516 | sur40 = kzalloc(sizeof(struct sur40_state), GFP_KERNEL); |
| 517 | if (!sur40) |
| 518 | return -ENOMEM; |
| 519 | |
| 520 | poll_dev = input_allocate_polled_device(); |
| 521 | if (!poll_dev) { |
| 522 | error = -ENOMEM; |
| 523 | goto err_free_dev; |
| 524 | } |
| 525 | |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 526 | /* initialize locks/lists */ |
| 527 | INIT_LIST_HEAD(&sur40->buf_list); |
| 528 | spin_lock_init(&sur40->qlock); |
| 529 | mutex_init(&sur40->lock); |
| 530 | |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 531 | /* Set up polled input device control structure */ |
| 532 | poll_dev->private = sur40; |
| 533 | poll_dev->poll_interval = POLL_INTERVAL; |
| 534 | poll_dev->open = sur40_open; |
| 535 | poll_dev->poll = sur40_poll; |
| 536 | poll_dev->close = sur40_close; |
| 537 | |
| 538 | /* Set up regular input device structure */ |
| 539 | sur40_input_setup(poll_dev->input); |
| 540 | |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 541 | poll_dev->input->name = DRIVER_LONG; |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 542 | usb_to_input_id(usbdev, &poll_dev->input->id); |
| 543 | usb_make_path(usbdev, sur40->phys, sizeof(sur40->phys)); |
| 544 | strlcat(sur40->phys, "/input0", sizeof(sur40->phys)); |
| 545 | poll_dev->input->phys = sur40->phys; |
| 546 | poll_dev->input->dev.parent = &interface->dev; |
| 547 | |
| 548 | sur40->usbdev = usbdev; |
| 549 | sur40->dev = &interface->dev; |
| 550 | sur40->input = poll_dev; |
| 551 | |
| 552 | /* use the bulk-in endpoint tested above */ |
| 553 | sur40->bulk_in_size = usb_endpoint_maxp(endpoint); |
| 554 | sur40->bulk_in_epaddr = endpoint->bEndpointAddress; |
| 555 | sur40->bulk_in_buffer = kmalloc(sur40->bulk_in_size, GFP_KERNEL); |
| 556 | if (!sur40->bulk_in_buffer) { |
| 557 | dev_err(&interface->dev, "Unable to allocate input buffer."); |
| 558 | error = -ENOMEM; |
| 559 | goto err_free_polldev; |
| 560 | } |
| 561 | |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 562 | /* register the polled input device */ |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 563 | error = input_register_polled_device(poll_dev); |
| 564 | if (error) { |
| 565 | dev_err(&interface->dev, |
| 566 | "Unable to register polled input device."); |
| 567 | goto err_free_buffer; |
| 568 | } |
| 569 | |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 570 | /* register the video master device */ |
| 571 | snprintf(sur40->v4l2.name, sizeof(sur40->v4l2.name), "%s", DRIVER_LONG); |
| 572 | error = v4l2_device_register(sur40->dev, &sur40->v4l2); |
| 573 | if (error) { |
| 574 | dev_err(&interface->dev, |
| 575 | "Unable to register video master device."); |
| 576 | goto err_unreg_v4l2; |
| 577 | } |
| 578 | |
| 579 | /* initialize the lock and subdevice */ |
| 580 | sur40->queue = sur40_queue; |
| 581 | sur40->queue.drv_priv = sur40; |
| 582 | sur40->queue.lock = &sur40->lock; |
| 583 | |
| 584 | /* initialize the queue */ |
| 585 | error = vb2_queue_init(&sur40->queue); |
| 586 | if (error) |
| 587 | goto err_unreg_v4l2; |
| 588 | |
| 589 | sur40->alloc_ctx = vb2_dma_sg_init_ctx(sur40->dev); |
| 590 | if (IS_ERR(sur40->alloc_ctx)) { |
| 591 | dev_err(sur40->dev, "Can't allocate buffer context"); |
Julia Lawall | ff89de6 | 2015-08-24 10:51:04 -0700 | [diff] [blame] | 592 | error = PTR_ERR(sur40->alloc_ctx); |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 593 | goto err_unreg_v4l2; |
| 594 | } |
| 595 | |
| 596 | sur40->vdev = sur40_video_device; |
| 597 | sur40->vdev.v4l2_dev = &sur40->v4l2; |
| 598 | sur40->vdev.lock = &sur40->lock; |
| 599 | sur40->vdev.queue = &sur40->queue; |
| 600 | video_set_drvdata(&sur40->vdev, sur40); |
| 601 | |
| 602 | error = video_register_device(&sur40->vdev, VFL_TYPE_GRABBER, -1); |
| 603 | if (error) { |
| 604 | dev_err(&interface->dev, |
| 605 | "Unable to register video subdevice."); |
| 606 | goto err_unreg_video; |
| 607 | } |
| 608 | |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 609 | /* we can register the device now, as it is ready */ |
| 610 | usb_set_intfdata(interface, sur40); |
| 611 | dev_dbg(&interface->dev, "%s is now attached\n", DRIVER_DESC); |
| 612 | |
| 613 | return 0; |
| 614 | |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 615 | err_unreg_video: |
| 616 | video_unregister_device(&sur40->vdev); |
| 617 | err_unreg_v4l2: |
| 618 | v4l2_device_unregister(&sur40->v4l2); |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 619 | err_free_buffer: |
| 620 | kfree(sur40->bulk_in_buffer); |
| 621 | err_free_polldev: |
| 622 | input_free_polled_device(sur40->input); |
| 623 | err_free_dev: |
| 624 | kfree(sur40); |
| 625 | |
| 626 | return error; |
| 627 | } |
| 628 | |
| 629 | /* Unregister device & clean up. */ |
| 630 | static void sur40_disconnect(struct usb_interface *interface) |
| 631 | { |
| 632 | struct sur40_state *sur40 = usb_get_intfdata(interface); |
| 633 | |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 634 | video_unregister_device(&sur40->vdev); |
| 635 | v4l2_device_unregister(&sur40->v4l2); |
| 636 | vb2_dma_sg_cleanup_ctx(sur40->alloc_ctx); |
| 637 | |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 638 | input_unregister_polled_device(sur40->input); |
| 639 | input_free_polled_device(sur40->input); |
| 640 | kfree(sur40->bulk_in_buffer); |
| 641 | kfree(sur40); |
| 642 | |
| 643 | usb_set_intfdata(interface, NULL); |
| 644 | dev_dbg(&interface->dev, "%s is now disconnected\n", DRIVER_DESC); |
| 645 | } |
| 646 | |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 647 | /* |
| 648 | * Setup the constraints of the queue: besides setting the number of planes |
| 649 | * per buffer and the size and allocation context of each plane, it also |
| 650 | * checks if sufficient buffers have been allocated. Usually 3 is a good |
| 651 | * minimum number: many DMA engines need a minimum of 2 buffers in the |
| 652 | * queue and you need to have another available for userspace processing. |
| 653 | */ |
Hans Verkuil | df9ecb0 | 2015-10-28 00:50:37 -0200 | [diff] [blame] | 654 | static int sur40_queue_setup(struct vb2_queue *q, |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 655 | unsigned int *nbuffers, unsigned int *nplanes, |
| 656 | unsigned int sizes[], void *alloc_ctxs[]) |
| 657 | { |
| 658 | struct sur40_state *sur40 = vb2_get_drv_priv(q); |
| 659 | |
| 660 | if (q->num_buffers + *nbuffers < 3) |
| 661 | *nbuffers = 3 - q->num_buffers; |
Hans Verkuil | df9ecb0 | 2015-10-28 00:50:37 -0200 | [diff] [blame] | 662 | alloc_ctxs[0] = sur40->alloc_ctx; |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 663 | |
Hans Verkuil | df9ecb0 | 2015-10-28 00:50:37 -0200 | [diff] [blame] | 664 | if (*nplanes) |
| 665 | return sizes[0] < sur40_video_format.sizeimage ? -EINVAL : 0; |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 666 | |
| 667 | *nplanes = 1; |
Hans Verkuil | df9ecb0 | 2015-10-28 00:50:37 -0200 | [diff] [blame] | 668 | sizes[0] = sur40_video_format.sizeimage; |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 669 | |
| 670 | return 0; |
| 671 | } |
| 672 | |
| 673 | /* |
| 674 | * Prepare the buffer for queueing to the DMA engine: check and set the |
| 675 | * payload size. |
| 676 | */ |
| 677 | static int sur40_buffer_prepare(struct vb2_buffer *vb) |
| 678 | { |
| 679 | struct sur40_state *sur40 = vb2_get_drv_priv(vb->vb2_queue); |
| 680 | unsigned long size = sur40_video_format.sizeimage; |
| 681 | |
| 682 | if (vb2_plane_size(vb, 0) < size) { |
| 683 | dev_err(&sur40->usbdev->dev, "buffer too small (%lu < %lu)\n", |
| 684 | vb2_plane_size(vb, 0), size); |
| 685 | return -EINVAL; |
| 686 | } |
| 687 | |
| 688 | vb2_set_plane_payload(vb, 0, size); |
| 689 | return 0; |
| 690 | } |
| 691 | |
| 692 | /* |
| 693 | * Queue this buffer to the DMA engine. |
| 694 | */ |
| 695 | static void sur40_buffer_queue(struct vb2_buffer *vb) |
| 696 | { |
| 697 | struct sur40_state *sur40 = vb2_get_drv_priv(vb->vb2_queue); |
| 698 | struct sur40_buffer *buf = (struct sur40_buffer *)vb; |
| 699 | |
| 700 | spin_lock(&sur40->qlock); |
| 701 | list_add_tail(&buf->list, &sur40->buf_list); |
| 702 | spin_unlock(&sur40->qlock); |
| 703 | } |
| 704 | |
| 705 | static void return_all_buffers(struct sur40_state *sur40, |
| 706 | enum vb2_buffer_state state) |
| 707 | { |
| 708 | struct sur40_buffer *buf, *node; |
| 709 | |
| 710 | spin_lock(&sur40->qlock); |
| 711 | list_for_each_entry_safe(buf, node, &sur40->buf_list, list) { |
Junghak Sung | 2d70071 | 2015-09-22 10:30:30 -0300 | [diff] [blame] | 712 | vb2_buffer_done(&buf->vb.vb2_buf, state); |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 713 | list_del(&buf->list); |
| 714 | } |
| 715 | spin_unlock(&sur40->qlock); |
| 716 | } |
| 717 | |
| 718 | /* |
| 719 | * Start streaming. First check if the minimum number of buffers have been |
| 720 | * queued. If not, then return -ENOBUFS and the vb2 framework will call |
| 721 | * this function again the next time a buffer has been queued until enough |
| 722 | * buffers are available to actually start the DMA engine. |
| 723 | */ |
| 724 | static int sur40_start_streaming(struct vb2_queue *vq, unsigned int count) |
| 725 | { |
| 726 | struct sur40_state *sur40 = vb2_get_drv_priv(vq); |
| 727 | |
| 728 | sur40->sequence = 0; |
| 729 | return 0; |
| 730 | } |
| 731 | |
| 732 | /* |
| 733 | * Stop the DMA engine. Any remaining buffers in the DMA queue are dequeued |
| 734 | * and passed on to the vb2 framework marked as STATE_ERROR. |
| 735 | */ |
| 736 | static void sur40_stop_streaming(struct vb2_queue *vq) |
| 737 | { |
| 738 | struct sur40_state *sur40 = vb2_get_drv_priv(vq); |
Florian Echtler | 2b7eea8 | 2015-05-25 09:04:16 -0300 | [diff] [blame] | 739 | sur40->sequence = -1; |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 740 | |
| 741 | /* Release all active buffers */ |
| 742 | return_all_buffers(sur40, VB2_BUF_STATE_ERROR); |
| 743 | } |
| 744 | |
| 745 | /* V4L ioctl */ |
| 746 | static int sur40_vidioc_querycap(struct file *file, void *priv, |
| 747 | struct v4l2_capability *cap) |
| 748 | { |
| 749 | struct sur40_state *sur40 = video_drvdata(file); |
| 750 | |
| 751 | strlcpy(cap->driver, DRIVER_SHORT, sizeof(cap->driver)); |
| 752 | strlcpy(cap->card, DRIVER_LONG, sizeof(cap->card)); |
| 753 | usb_make_path(sur40->usbdev, cap->bus_info, sizeof(cap->bus_info)); |
| 754 | cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | |
| 755 | V4L2_CAP_READWRITE | |
| 756 | V4L2_CAP_STREAMING; |
| 757 | cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; |
| 758 | return 0; |
| 759 | } |
| 760 | |
| 761 | static int sur40_vidioc_enum_input(struct file *file, void *priv, |
| 762 | struct v4l2_input *i) |
| 763 | { |
| 764 | if (i->index != 0) |
| 765 | return -EINVAL; |
| 766 | i->type = V4L2_INPUT_TYPE_CAMERA; |
| 767 | i->std = V4L2_STD_UNKNOWN; |
| 768 | strlcpy(i->name, "In-Cell Sensor", sizeof(i->name)); |
| 769 | i->capabilities = 0; |
| 770 | return 0; |
| 771 | } |
| 772 | |
| 773 | static int sur40_vidioc_s_input(struct file *file, void *priv, unsigned int i) |
| 774 | { |
| 775 | return (i == 0) ? 0 : -EINVAL; |
| 776 | } |
| 777 | |
| 778 | static int sur40_vidioc_g_input(struct file *file, void *priv, unsigned int *i) |
| 779 | { |
| 780 | *i = 0; |
| 781 | return 0; |
| 782 | } |
| 783 | |
| 784 | static int sur40_vidioc_fmt(struct file *file, void *priv, |
| 785 | struct v4l2_format *f) |
| 786 | { |
| 787 | f->fmt.pix = sur40_video_format; |
| 788 | return 0; |
| 789 | } |
| 790 | |
| 791 | static int sur40_vidioc_enum_fmt(struct file *file, void *priv, |
| 792 | struct v4l2_fmtdesc *f) |
| 793 | { |
| 794 | if (f->index != 0) |
| 795 | return -EINVAL; |
| 796 | strlcpy(f->description, "8-bit greyscale", sizeof(f->description)); |
| 797 | f->pixelformat = V4L2_PIX_FMT_GREY; |
| 798 | f->flags = 0; |
| 799 | return 0; |
| 800 | } |
| 801 | |
Florian Echtler | da6e467 | 2015-05-25 09:04:14 -0300 | [diff] [blame] | 802 | static int sur40_vidioc_enum_framesizes(struct file *file, void *priv, |
| 803 | struct v4l2_frmsizeenum *f) |
| 804 | { |
| 805 | if ((f->index != 0) || (f->pixel_format != V4L2_PIX_FMT_GREY)) |
| 806 | return -EINVAL; |
| 807 | |
| 808 | f->type = V4L2_FRMSIZE_TYPE_DISCRETE; |
| 809 | f->discrete.width = sur40_video_format.width; |
| 810 | f->discrete.height = sur40_video_format.height; |
| 811 | return 0; |
| 812 | } |
| 813 | |
| 814 | static int sur40_vidioc_enum_frameintervals(struct file *file, void *priv, |
| 815 | struct v4l2_frmivalenum *f) |
| 816 | { |
| 817 | if ((f->index > 1) || (f->pixel_format != V4L2_PIX_FMT_GREY) |
| 818 | || (f->width != sur40_video_format.width) |
| 819 | || (f->height != sur40_video_format.height)) |
| 820 | return -EINVAL; |
| 821 | |
| 822 | f->type = V4L2_FRMIVAL_TYPE_DISCRETE; |
| 823 | f->discrete.denominator = 60/(f->index+1); |
| 824 | f->discrete.numerator = 1; |
| 825 | return 0; |
| 826 | } |
| 827 | |
| 828 | |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 829 | static const struct usb_device_id sur40_table[] = { |
| 830 | { USB_DEVICE(ID_MICROSOFT, ID_SUR40) }, /* Samsung SUR40 */ |
| 831 | { } /* terminating null entry */ |
| 832 | }; |
| 833 | MODULE_DEVICE_TABLE(usb, sur40_table); |
| 834 | |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 835 | /* V4L2 structures */ |
| 836 | static const struct vb2_ops sur40_queue_ops = { |
| 837 | .queue_setup = sur40_queue_setup, |
| 838 | .buf_prepare = sur40_buffer_prepare, |
| 839 | .buf_queue = sur40_buffer_queue, |
| 840 | .start_streaming = sur40_start_streaming, |
| 841 | .stop_streaming = sur40_stop_streaming, |
| 842 | .wait_prepare = vb2_ops_wait_prepare, |
| 843 | .wait_finish = vb2_ops_wait_finish, |
| 844 | }; |
| 845 | |
| 846 | static const struct vb2_queue sur40_queue = { |
| 847 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, |
| 848 | /* |
| 849 | * VB2_USERPTR in currently not enabled: passing a user pointer to |
| 850 | * dma-sg will result in segment sizes that are not a multiple of |
| 851 | * 512 bytes, which is required by the host controller. |
| 852 | */ |
| 853 | .io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF, |
| 854 | .buf_struct_size = sizeof(struct sur40_buffer), |
| 855 | .ops = &sur40_queue_ops, |
| 856 | .mem_ops = &vb2_dma_sg_memops, |
| 857 | .timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC, |
| 858 | .min_buffers_needed = 3, |
| 859 | }; |
| 860 | |
| 861 | static const struct v4l2_file_operations sur40_video_fops = { |
| 862 | .owner = THIS_MODULE, |
| 863 | .open = v4l2_fh_open, |
| 864 | .release = vb2_fop_release, |
| 865 | .unlocked_ioctl = video_ioctl2, |
| 866 | .read = vb2_fop_read, |
| 867 | .mmap = vb2_fop_mmap, |
| 868 | .poll = vb2_fop_poll, |
| 869 | }; |
| 870 | |
| 871 | static const struct v4l2_ioctl_ops sur40_video_ioctl_ops = { |
| 872 | |
| 873 | .vidioc_querycap = sur40_vidioc_querycap, |
| 874 | |
| 875 | .vidioc_enum_fmt_vid_cap = sur40_vidioc_enum_fmt, |
| 876 | .vidioc_try_fmt_vid_cap = sur40_vidioc_fmt, |
| 877 | .vidioc_s_fmt_vid_cap = sur40_vidioc_fmt, |
| 878 | .vidioc_g_fmt_vid_cap = sur40_vidioc_fmt, |
| 879 | |
Florian Echtler | da6e467 | 2015-05-25 09:04:14 -0300 | [diff] [blame] | 880 | .vidioc_enum_framesizes = sur40_vidioc_enum_framesizes, |
| 881 | .vidioc_enum_frameintervals = sur40_vidioc_enum_frameintervals, |
| 882 | |
Florian Echtler | e831cd2 | 2015-03-16 06:48:23 -0300 | [diff] [blame] | 883 | .vidioc_enum_input = sur40_vidioc_enum_input, |
| 884 | .vidioc_g_input = sur40_vidioc_g_input, |
| 885 | .vidioc_s_input = sur40_vidioc_s_input, |
| 886 | |
| 887 | .vidioc_reqbufs = vb2_ioctl_reqbufs, |
| 888 | .vidioc_create_bufs = vb2_ioctl_create_bufs, |
| 889 | .vidioc_querybuf = vb2_ioctl_querybuf, |
| 890 | .vidioc_qbuf = vb2_ioctl_qbuf, |
| 891 | .vidioc_dqbuf = vb2_ioctl_dqbuf, |
| 892 | .vidioc_expbuf = vb2_ioctl_expbuf, |
| 893 | |
| 894 | .vidioc_streamon = vb2_ioctl_streamon, |
| 895 | .vidioc_streamoff = vb2_ioctl_streamoff, |
| 896 | }; |
| 897 | |
| 898 | static const struct video_device sur40_video_device = { |
| 899 | .name = DRIVER_LONG, |
| 900 | .fops = &sur40_video_fops, |
| 901 | .ioctl_ops = &sur40_video_ioctl_ops, |
| 902 | .release = video_device_release_empty, |
| 903 | }; |
| 904 | |
| 905 | static const struct v4l2_pix_format sur40_video_format = { |
| 906 | .pixelformat = V4L2_PIX_FMT_GREY, |
| 907 | .width = SENSOR_RES_X / 2, |
| 908 | .height = SENSOR_RES_Y / 2, |
| 909 | .field = V4L2_FIELD_NONE, |
| 910 | .colorspace = V4L2_COLORSPACE_SRGB, |
| 911 | .bytesperline = SENSOR_RES_X / 2, |
| 912 | .sizeimage = (SENSOR_RES_X/2) * (SENSOR_RES_Y/2), |
| 913 | }; |
| 914 | |
Florian Echtler | bdb5c57 | 2013-11-08 10:01:13 -0800 | [diff] [blame] | 915 | /* USB-specific object needed to register this driver with the USB subsystem. */ |
| 916 | static struct usb_driver sur40_driver = { |
| 917 | .name = DRIVER_SHORT, |
| 918 | .probe = sur40_probe, |
| 919 | .disconnect = sur40_disconnect, |
| 920 | .id_table = sur40_table, |
| 921 | }; |
| 922 | |
| 923 | module_usb_driver(sur40_driver); |
| 924 | |
| 925 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 926 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 927 | MODULE_LICENSE("GPL"); |