1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * stk-webcam.c : Driver for Syntek 1125 USB webcam controller 4 * 5 * Copyright (C) 2006 Nicolas VIVIEN 6 * Copyright 2007-2008 Jaime Velasco Juan <jsagarribay@gmail.com> 7 * 8 * Some parts are inspired from cafe_ccic.c 9 * Copyright 2006-2007 Jonathan Corbet 10 */ 11 12#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 13 14#include <linux/module.h> 15#include <linux/init.h> 16#include <linux/kernel.h> 17#include <linux/errno.h> 18#include <linux/slab.h> 19 20#include <linux/dmi.h> 21#include <linux/usb.h> 22#include <linux/mm.h> 23#include <linux/vmalloc.h> 24#include <linux/videodev2.h> 25#include <media/v4l2-common.h> 26#include <media/v4l2-ioctl.h> 27#include <media/v4l2-event.h> 28 29#include "stk-webcam.h" 30 31 32static int hflip = -1; 33module_param(hflip, int, 0444); 34MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 0"); 35 36static int vflip = -1; 37module_param(vflip, int, 0444); 38MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 0"); 39 40static int debug; 41module_param(debug, int, 0444); 42MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0"); 43 44MODULE_LICENSE("GPL"); 45MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN"); 46MODULE_DESCRIPTION("Syntek DC1125 webcam driver"); 47 48/* Some cameras have audio interfaces, we aren't interested in those */ 49static const struct usb_device_id stkwebcam_table[] = { 50 { USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) }, 51 { USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) }, 52 { } 53}; 54MODULE_DEVICE_TABLE(usb, stkwebcam_table); 55 56/* 57 * The stk webcam laptop module is mounted upside down in some laptops :( 58 * 59 * Some background information (thanks to Hans de Goede for providing this): 60 * 61 * 1) Once upon a time the stkwebcam driver was written 62 * 63 * 2) The webcam in question was used mostly in Asus laptop models, including 64 * the laptop of the original author of the driver, and in these models, in 65 * typical Asus fashion (see the long long list for uvc cams inside v4l-utils), 66 * they mounted the webcam-module the wrong way up. So the hflip and vflip 67 * module options were given a default value of 1 (the correct value for 68 * upside down mounted models) 69 * 70 * 3) Years later I got a bug report from a user with a laptop with stkwebcam, 71 * where the module was actually mounted the right way up, and thus showed 72 * upside down under Linux. So now I was facing the choice of 2 options: 73 * 74 * a) Add a not-upside-down list to stkwebcam, which overrules the default. 75 * 76 * b) Do it like all the other drivers do, and make the default right for 77 * cams mounted the proper way and add an upside-down model list, with 78 * models where we need to flip-by-default. 79 * 80 * Despite knowing that going b) would cause a period of pain where we were 81 * building the table I opted to go for option b), since a) is just too ugly, 82 * and worse different from how every other driver does it leading to 83 * confusion in the long run. This change was made in kernel 3.6. 84 * 85 * So for any user report about upside-down images since kernel 3.6 ask them 86 * to provide the output of 'sudo dmidecode' so the laptop can be added in 87 * the table below. 88 */ 89static const struct dmi_system_id stk_upside_down_dmi_table[] = { 90 { 91 .ident = "ASUS G1", 92 .matches = { 93 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), 94 DMI_MATCH(DMI_PRODUCT_NAME, "G1") 95 } 96 }, { 97 .ident = "ASUS F3JC", 98 .matches = { 99 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), 100 DMI_MATCH(DMI_PRODUCT_NAME, "F3JC") 101 } 102 }, 103 { 104 .ident = "T12Rg-H", 105 .matches = { 106 DMI_MATCH(DMI_SYS_VENDOR, "HCL Infosystems Limited"), 107 DMI_MATCH(DMI_PRODUCT_NAME, "T12Rg-H") 108 } 109 }, 110 { 111 .ident = "ASUS A6VM", 112 .matches = { 113 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), 114 DMI_MATCH(DMI_PRODUCT_NAME, "A6VM") 115 } 116 }, 117 {} 118}; 119 120 121/* 122 * Basic stuff 123 */ 124int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value) 125{ 126 struct usb_device *udev = dev->udev; 127 int ret; 128 129 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 130 0x01, 131 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 132 value, 133 index, 134 NULL, 135 0, 136 500); 137 if (ret < 0) 138 return ret; 139 else 140 return 0; 141} 142 143int stk_camera_read_reg(struct stk_camera *dev, u16 index, u8 *value) 144{ 145 struct usb_device *udev = dev->udev; 146 unsigned char *buf; 147 int ret; 148 149 buf = kmalloc(sizeof(u8), GFP_KERNEL); 150 if (!buf) 151 return -ENOMEM; 152 153 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 154 0x00, 155 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 156 0x00, 157 index, 158 buf, 159 sizeof(u8), 160 500); 161 if (ret >= 0) 162 *value = *buf; 163 164 kfree(buf); 165 166 if (ret < 0) 167 return ret; 168 else 169 return 0; 170} 171 172static int stk_start_stream(struct stk_camera *dev) 173{ 174 u8 value; 175 int i, ret; 176 u8 value_116, value_117; 177 178 179 if (!is_present(dev)) 180 return -ENODEV; 181 if (!is_memallocd(dev) || !is_initialised(dev)) { 182 pr_err("FIXME: Buffers are not allocated\n"); 183 return -EFAULT; 184 } 185 ret = usb_set_interface(dev->udev, 0, 5); 186 187 if (ret < 0) 188 pr_err("usb_set_interface failed !\n"); 189 if (stk_sensor_wakeup(dev)) 190 pr_err("error awaking the sensor\n"); 191 192 stk_camera_read_reg(dev, 0x0116, &value_116); 193 stk_camera_read_reg(dev, 0x0117, &value_117); 194 195 stk_camera_write_reg(dev, 0x0116, 0x0000); 196 stk_camera_write_reg(dev, 0x0117, 0x0000); 197 198 stk_camera_read_reg(dev, 0x0100, &value); 199 stk_camera_write_reg(dev, 0x0100, value | 0x80); 200 201 stk_camera_write_reg(dev, 0x0116, value_116); 202 stk_camera_write_reg(dev, 0x0117, value_117); 203 for (i = 0; i < MAX_ISO_BUFS; i++) { 204 if (dev->isobufs[i].urb) { 205 ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL); 206 atomic_inc(&dev->urbs_used); 207 if (ret) 208 return ret; 209 } 210 } 211 set_streaming(dev); 212 return 0; 213} 214 215static int stk_stop_stream(struct stk_camera *dev) 216{ 217 u8 value; 218 int i; 219 if (is_present(dev)) { 220 stk_camera_read_reg(dev, 0x0100, &value); 221 stk_camera_write_reg(dev, 0x0100, value & ~0x80); 222 if (dev->isobufs != NULL) { 223 for (i = 0; i < MAX_ISO_BUFS; i++) { 224 if (dev->isobufs[i].urb) 225 usb_kill_urb(dev->isobufs[i].urb); 226 } 227 } 228 unset_streaming(dev); 229 230 if (usb_set_interface(dev->udev, 0, 0)) 231 pr_err("usb_set_interface failed !\n"); 232 if (stk_sensor_sleep(dev)) 233 pr_err("error suspending the sensor\n"); 234 } 235 return 0; 236} 237 238/* 239 * This seems to be the shortest init sequence we 240 * must do in order to find the sensor 241 * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor 242 * is also reset. Maybe powers down it? 243 * Rest of values don't make a difference 244 */ 245 246static struct regval stk1125_initvals[] = { 247 /*TODO: What means this sequence? */ 248 {0x0000, 0x24}, 249 {0x0100, 0x21}, 250 {0x0002, 0x68}, 251 {0x0003, 0x80}, 252 {0x0005, 0x00}, 253 {0x0007, 0x03}, 254 {0x000d, 0x00}, 255 {0x000f, 0x02}, 256 {0x0300, 0x12}, 257 {0x0350, 0x41}, 258 {0x0351, 0x00}, 259 {0x0352, 0x00}, 260 {0x0353, 0x00}, 261 {0x0018, 0x10}, 262 {0x0019, 0x00}, 263 {0x001b, 0x0e}, 264 {0x001c, 0x46}, 265 {0x0300, 0x80}, 266 {0x001a, 0x04}, 267 {0x0110, 0x00}, 268 {0x0111, 0x00}, 269 {0x0112, 0x00}, 270 {0x0113, 0x00}, 271 272 {0xffff, 0xff}, 273}; 274 275 276static int stk_initialise(struct stk_camera *dev) 277{ 278 struct regval *rv; 279 int ret; 280 if (!is_present(dev)) 281 return -ENODEV; 282 if (is_initialised(dev)) 283 return 0; 284 rv = stk1125_initvals; 285 while (rv->reg != 0xffff) { 286 ret = stk_camera_write_reg(dev, rv->reg, rv->val); 287 if (ret) 288 return ret; 289 rv++; 290 } 291 if (stk_sensor_init(dev) == 0) { 292 set_initialised(dev); 293 return 0; 294 } else 295 return -1; 296} 297 298/* *********************************************** */ 299/* 300 * This function is called as an URB transfert is complete (Isochronous pipe). 301 * So, the traitement is done in interrupt time, so it has be fast, not crash, 302 * and not stall. Neat. 303 */ 304static void stk_isoc_handler(struct urb *urb) 305{ 306 int i; 307 int ret; 308 int framelen; 309 unsigned long flags; 310 311 unsigned char *fill = NULL; 312 unsigned char *iso_buf = NULL; 313 314 struct stk_camera *dev; 315 struct stk_sio_buffer *fb; 316 317 dev = (struct stk_camera *) urb->context; 318 319 if (dev == NULL) { 320 pr_err("isoc_handler called with NULL device !\n"); 321 return; 322 } 323 324 if (urb->status == -ENOENT || urb->status == -ECONNRESET 325 || urb->status == -ESHUTDOWN) { 326 atomic_dec(&dev->urbs_used); 327 return; 328 } 329 330 spin_lock_irqsave(&dev->spinlock, flags); 331 332 if (urb->status != -EINPROGRESS && urb->status != 0) { 333 pr_err("isoc_handler: urb->status == %d\n", urb->status); 334 goto resubmit; 335 } 336 337 if (list_empty(&dev->sio_avail)) { 338 /*FIXME Stop streaming after a while */ 339 pr_err_ratelimited("isoc_handler without available buffer!\n"); 340 goto resubmit; 341 } 342 fb = list_first_entry(&dev->sio_avail, 343 struct stk_sio_buffer, list); 344 fill = fb->buffer + fb->v4lbuf.bytesused; 345 346 for (i = 0; i < urb->number_of_packets; i++) { 347 if (urb->iso_frame_desc[i].status != 0) { 348 if (urb->iso_frame_desc[i].status != -EXDEV) 349 pr_err("Frame %d has error %d\n", 350 i, urb->iso_frame_desc[i].status); 351 continue; 352 } 353 framelen = urb->iso_frame_desc[i].actual_length; 354 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset; 355 356 if (framelen <= 4) 357 continue; /* no data */ 358 359 /* 360 * we found something informational from there 361 * the isoc frames have to type of headers 362 * type1: 00 xx 00 00 or 20 xx 00 00 363 * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00 364 * xx is a sequencer which has never been seen over 0x3f 365 * imho data written down looks like bayer, i see similarities 366 * after every 640 bytes 367 */ 368 if (*iso_buf & 0x80) { 369 framelen -= 8; 370 iso_buf += 8; 371 /* This marks a new frame */ 372 if (fb->v4lbuf.bytesused != 0 373 && fb->v4lbuf.bytesused != dev->frame_size) { 374 pr_err_ratelimited("frame %d, bytesused=%d, skipping\n", 375 i, fb->v4lbuf.bytesused); 376 fb->v4lbuf.bytesused = 0; 377 fill = fb->buffer; 378 } else if (fb->v4lbuf.bytesused == dev->frame_size) { 379 if (list_is_singular(&dev->sio_avail)) { 380 /* Always reuse the last buffer */ 381 fb->v4lbuf.bytesused = 0; 382 fill = fb->buffer; 383 } else { 384 list_move_tail(dev->sio_avail.next, 385 &dev->sio_full); 386 wake_up(&dev->wait_frame); 387 fb = list_first_entry(&dev->sio_avail, 388 struct stk_sio_buffer, list); 389 fb->v4lbuf.bytesused = 0; 390 fill = fb->buffer; 391 } 392 } 393 } else { 394 framelen -= 4; 395 iso_buf += 4; 396 } 397 398 /* Our buffer is full !!! */ 399 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) { 400 pr_err_ratelimited("Frame buffer overflow, lost sync\n"); 401 /*FIXME Do something here? */ 402 continue; 403 } 404 spin_unlock_irqrestore(&dev->spinlock, flags); 405 memcpy(fill, iso_buf, framelen); 406 spin_lock_irqsave(&dev->spinlock, flags); 407 fill += framelen; 408 409 /* New size of our buffer */ 410 fb->v4lbuf.bytesused += framelen; 411 } 412 413resubmit: 414 spin_unlock_irqrestore(&dev->spinlock, flags); 415 urb->dev = dev->udev; 416 ret = usb_submit_urb(urb, GFP_ATOMIC); 417 if (ret != 0) { 418 pr_err("Error (%d) re-submitting urb in stk_isoc_handler\n", 419 ret); 420 } 421} 422 423/* -------------------------------------------- */ 424 425static int stk_prepare_iso(struct stk_camera *dev) 426{ 427 void *kbuf; 428 int i, j; 429 struct urb *urb; 430 struct usb_device *udev; 431 432 if (dev == NULL) 433 return -ENXIO; 434 udev = dev->udev; 435 436 if (dev->isobufs) 437 pr_err("isobufs already allocated. Bad\n"); 438 else 439 dev->isobufs = kcalloc(MAX_ISO_BUFS, sizeof(*dev->isobufs), 440 GFP_KERNEL); 441 if (dev->isobufs == NULL) { 442 pr_err("Unable to allocate iso buffers\n"); 443 return -ENOMEM; 444 } 445 for (i = 0; i < MAX_ISO_BUFS; i++) { 446 if (dev->isobufs[i].data == NULL) { 447 kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL); 448 if (kbuf == NULL) { 449 pr_err("Failed to allocate iso buffer %d\n", i); 450 goto isobufs_out; 451 } 452 dev->isobufs[i].data = kbuf; 453 } else 454 pr_err("isobuf data already allocated\n"); 455 if (dev->isobufs[i].urb == NULL) { 456 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL); 457 if (urb == NULL) 458 goto isobufs_out; 459 dev->isobufs[i].urb = urb; 460 } else { 461 pr_err("Killing URB\n"); 462 usb_kill_urb(dev->isobufs[i].urb); 463 urb = dev->isobufs[i].urb; 464 } 465 urb->interval = 1; 466 urb->dev = udev; 467 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep); 468 urb->transfer_flags = URB_ISO_ASAP; 469 urb->transfer_buffer = dev->isobufs[i].data; 470 urb->transfer_buffer_length = ISO_BUFFER_SIZE; 471 urb->complete = stk_isoc_handler; 472 urb->context = dev; 473 urb->start_frame = 0; 474 urb->number_of_packets = ISO_FRAMES_PER_DESC; 475 476 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) { 477 urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE; 478 urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE; 479 } 480 } 481 set_memallocd(dev); 482 return 0; 483 484isobufs_out: 485 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++) 486 kfree(dev->isobufs[i].data); 487 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++) 488 usb_free_urb(dev->isobufs[i].urb); 489 kfree(dev->isobufs); 490 dev->isobufs = NULL; 491 return -ENOMEM; 492} 493 494static void stk_clean_iso(struct stk_camera *dev) 495{ 496 int i; 497 498 if (dev == NULL || dev->isobufs == NULL) 499 return; 500 501 for (i = 0; i < MAX_ISO_BUFS; i++) { 502 struct urb *urb; 503 504 urb = dev->isobufs[i].urb; 505 if (urb) { 506 if (atomic_read(&dev->urbs_used) && is_present(dev)) 507 usb_kill_urb(urb); 508 usb_free_urb(urb); 509 } 510 kfree(dev->isobufs[i].data); 511 } 512 kfree(dev->isobufs); 513 dev->isobufs = NULL; 514 unset_memallocd(dev); 515} 516 517static int stk_setup_siobuf(struct stk_camera *dev, int index) 518{ 519 struct stk_sio_buffer *buf = dev->sio_bufs + index; 520 INIT_LIST_HEAD(&buf->list); 521 buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size); 522 buf->buffer = vmalloc_user(buf->v4lbuf.length); 523 if (buf->buffer == NULL) 524 return -ENOMEM; 525 buf->mapcount = 0; 526 buf->dev = dev; 527 buf->v4lbuf.index = index; 528 buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 529 buf->v4lbuf.flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 530 buf->v4lbuf.field = V4L2_FIELD_NONE; 531 buf->v4lbuf.memory = V4L2_MEMORY_MMAP; 532 buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length; 533 return 0; 534} 535 536static int stk_free_sio_buffers(struct stk_camera *dev) 537{ 538 int i; 539 int nbufs; 540 unsigned long flags; 541 if (dev->n_sbufs == 0 || dev->sio_bufs == NULL) 542 return 0; 543 /* 544 * If any buffers are mapped, we cannot free them at all. 545 */ 546 for (i = 0; i < dev->n_sbufs; i++) { 547 if (dev->sio_bufs[i].mapcount > 0) 548 return -EBUSY; 549 } 550 /* 551 * OK, let's do it. 552 */ 553 spin_lock_irqsave(&dev->spinlock, flags); 554 INIT_LIST_HEAD(&dev->sio_avail); 555 INIT_LIST_HEAD(&dev->sio_full); 556 nbufs = dev->n_sbufs; 557 dev->n_sbufs = 0; 558 spin_unlock_irqrestore(&dev->spinlock, flags); 559 for (i = 0; i < nbufs; i++) 560 vfree(dev->sio_bufs[i].buffer); 561 kfree(dev->sio_bufs); 562 dev->sio_bufs = NULL; 563 return 0; 564} 565 566static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs) 567{ 568 int i; 569 if (dev->sio_bufs != NULL) 570 pr_err("sio_bufs already allocated\n"); 571 else { 572 dev->sio_bufs = kcalloc(n_sbufs, 573 sizeof(struct stk_sio_buffer), 574 GFP_KERNEL); 575 if (dev->sio_bufs == NULL) 576 return -ENOMEM; 577 for (i = 0; i < n_sbufs; i++) { 578 if (stk_setup_siobuf(dev, i)) 579 return (dev->n_sbufs > 1 ? 0 : -ENOMEM); 580 dev->n_sbufs = i+1; 581 } 582 } 583 return 0; 584} 585 586static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs) 587{ 588 int err; 589 err = stk_prepare_iso(dev); 590 if (err) { 591 stk_clean_iso(dev); 592 return err; 593 } 594 err = stk_prepare_sio_buffers(dev, n_sbufs); 595 if (err) { 596 stk_free_sio_buffers(dev); 597 return err; 598 } 599 return 0; 600} 601 602static void stk_free_buffers(struct stk_camera *dev) 603{ 604 stk_clean_iso(dev); 605 stk_free_sio_buffers(dev); 606} 607/* -------------------------------------------- */ 608 609/* v4l file operations */ 610 611static int v4l_stk_open(struct file *fp) 612{ 613 struct stk_camera *dev = video_drvdata(fp); 614 int err; 615 616 if (dev == NULL || !is_present(dev)) 617 return -ENXIO; 618 619 if (mutex_lock_interruptible(&dev->lock)) 620 return -ERESTARTSYS; 621 if (!dev->first_init) 622 stk_camera_write_reg(dev, 0x0, 0x24); 623 else 624 dev->first_init = 0; 625 626 err = v4l2_fh_open(fp); 627 if (!err) 628 usb_autopm_get_interface(dev->interface); 629 mutex_unlock(&dev->lock); 630 return err; 631} 632 633static int v4l_stk_release(struct file *fp) 634{ 635 struct stk_camera *dev = video_drvdata(fp); 636 637 mutex_lock(&dev->lock); 638 if (dev->owner == fp) { 639 stk_stop_stream(dev); 640 stk_free_buffers(dev); 641 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */ 642 unset_initialised(dev); 643 dev->owner = NULL; 644 } 645 646 usb_autopm_put_interface(dev->interface); 647 mutex_unlock(&dev->lock); 648 return v4l2_fh_release(fp); 649} 650 651static ssize_t stk_read(struct file *fp, char __user *buf, 652 size_t count, loff_t *f_pos) 653{ 654 int i; 655 int ret; 656 unsigned long flags; 657 struct stk_sio_buffer *sbuf; 658 struct stk_camera *dev = video_drvdata(fp); 659 660 if (!is_present(dev)) 661 return -EIO; 662 if (dev->owner && (!dev->reading || dev->owner != fp)) 663 return -EBUSY; 664 dev->owner = fp; 665 if (!is_streaming(dev)) { 666 if (stk_initialise(dev) 667 || stk_allocate_buffers(dev, 3) 668 || stk_start_stream(dev)) 669 return -ENOMEM; 670 dev->reading = 1; 671 spin_lock_irqsave(&dev->spinlock, flags); 672 for (i = 0; i < dev->n_sbufs; i++) { 673 list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail); 674 dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED; 675 } 676 spin_unlock_irqrestore(&dev->spinlock, flags); 677 } 678 if (*f_pos == 0) { 679 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full)) 680 return -EWOULDBLOCK; 681 ret = wait_event_interruptible(dev->wait_frame, 682 !list_empty(&dev->sio_full) || !is_present(dev)); 683 if (ret) 684 return ret; 685 if (!is_present(dev)) 686 return -EIO; 687 } 688 if (count + *f_pos > dev->frame_size) 689 count = dev->frame_size - *f_pos; 690 spin_lock_irqsave(&dev->spinlock, flags); 691 if (list_empty(&dev->sio_full)) { 692 spin_unlock_irqrestore(&dev->spinlock, flags); 693 pr_err("BUG: No siobufs ready\n"); 694 return 0; 695 } 696 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list); 697 spin_unlock_irqrestore(&dev->spinlock, flags); 698 699 if (copy_to_user(buf, sbuf->buffer + *f_pos, count)) 700 return -EFAULT; 701 702 *f_pos += count; 703 704 if (*f_pos >= dev->frame_size) { 705 *f_pos = 0; 706 spin_lock_irqsave(&dev->spinlock, flags); 707 list_move_tail(&sbuf->list, &dev->sio_avail); 708 spin_unlock_irqrestore(&dev->spinlock, flags); 709 } 710 return count; 711} 712 713static ssize_t v4l_stk_read(struct file *fp, char __user *buf, 714 size_t count, loff_t *f_pos) 715{ 716 struct stk_camera *dev = video_drvdata(fp); 717 int ret; 718 719 if (mutex_lock_interruptible(&dev->lock)) 720 return -ERESTARTSYS; 721 ret = stk_read(fp, buf, count, f_pos); 722 mutex_unlock(&dev->lock); 723 return ret; 724} 725 726static __poll_t v4l_stk_poll(struct file *fp, poll_table *wait) 727{ 728 struct stk_camera *dev = video_drvdata(fp); 729 __poll_t res = v4l2_ctrl_poll(fp, wait); 730 731 poll_wait(fp, &dev->wait_frame, wait); 732 733 if (!is_present(dev)) 734 return EPOLLERR; 735 736 if (!list_empty(&dev->sio_full)) 737 return res | EPOLLIN | EPOLLRDNORM; 738 739 return res; 740} 741 742 743static void stk_v4l_vm_open(struct vm_area_struct *vma) 744{ 745 struct stk_sio_buffer *sbuf = vma->vm_private_data; 746 sbuf->mapcount++; 747} 748static void stk_v4l_vm_close(struct vm_area_struct *vma) 749{ 750 struct stk_sio_buffer *sbuf = vma->vm_private_data; 751 sbuf->mapcount--; 752 if (sbuf->mapcount == 0) 753 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED; 754} 755static const struct vm_operations_struct stk_v4l_vm_ops = { 756 .open = stk_v4l_vm_open, 757 .close = stk_v4l_vm_close 758}; 759 760static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma) 761{ 762 unsigned int i; 763 int ret; 764 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; 765 struct stk_camera *dev = video_drvdata(fp); 766 struct stk_sio_buffer *sbuf = NULL; 767 768 if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED)) 769 return -EINVAL; 770 771 for (i = 0; i < dev->n_sbufs; i++) { 772 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) { 773 sbuf = dev->sio_bufs + i; 774 break; 775 } 776 } 777 if (sbuf == NULL) 778 return -EINVAL; 779 ret = remap_vmalloc_range(vma, sbuf->buffer, 0); 780 if (ret) 781 return ret; 782 vma->vm_flags |= VM_DONTEXPAND; 783 vma->vm_private_data = sbuf; 784 vma->vm_ops = &stk_v4l_vm_ops; 785 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED; 786 stk_v4l_vm_open(vma); 787 return 0; 788} 789 790/* v4l ioctl handlers */ 791 792static int stk_vidioc_querycap(struct file *filp, 793 void *priv, struct v4l2_capability *cap) 794{ 795 struct stk_camera *dev = video_drvdata(filp); 796 797 strscpy(cap->driver, "stk", sizeof(cap->driver)); 798 strscpy(cap->card, "stk", sizeof(cap->card)); 799 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); 800 return 0; 801} 802 803static int stk_vidioc_enum_input(struct file *filp, 804 void *priv, struct v4l2_input *input) 805{ 806 if (input->index != 0) 807 return -EINVAL; 808 809 strscpy(input->name, "Syntek USB Camera", sizeof(input->name)); 810 input->type = V4L2_INPUT_TYPE_CAMERA; 811 return 0; 812} 813 814 815static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i) 816{ 817 *i = 0; 818 return 0; 819} 820 821static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i) 822{ 823 return i ? -EINVAL : 0; 824} 825 826static int stk_s_ctrl(struct v4l2_ctrl *ctrl) 827{ 828 struct stk_camera *dev = 829 container_of(ctrl->handler, struct stk_camera, hdl); 830 831 switch (ctrl->id) { 832 case V4L2_CID_BRIGHTNESS: 833 return stk_sensor_set_brightness(dev, ctrl->val); 834 case V4L2_CID_HFLIP: 835 if (dmi_check_system(stk_upside_down_dmi_table)) 836 dev->vsettings.hflip = !ctrl->val; 837 else 838 dev->vsettings.hflip = ctrl->val; 839 return 0; 840 case V4L2_CID_VFLIP: 841 if (dmi_check_system(stk_upside_down_dmi_table)) 842 dev->vsettings.vflip = !ctrl->val; 843 else 844 dev->vsettings.vflip = ctrl->val; 845 return 0; 846 default: 847 return -EINVAL; 848 } 849 return 0; 850} 851 852 853static int stk_vidioc_enum_fmt_vid_cap(struct file *filp, 854 void *priv, struct v4l2_fmtdesc *fmtd) 855{ 856 switch (fmtd->index) { 857 case 0: 858 fmtd->pixelformat = V4L2_PIX_FMT_RGB565; 859 break; 860 case 1: 861 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X; 862 break; 863 case 2: 864 fmtd->pixelformat = V4L2_PIX_FMT_UYVY; 865 break; 866 case 3: 867 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8; 868 break; 869 case 4: 870 fmtd->pixelformat = V4L2_PIX_FMT_YUYV; 871 break; 872 default: 873 return -EINVAL; 874 } 875 return 0; 876} 877 878static struct stk_size { 879 unsigned w; 880 unsigned h; 881 enum stk_mode m; 882} stk_sizes[] = { 883 { .w = 1280, .h = 1024, .m = MODE_SXGA, }, 884 { .w = 640, .h = 480, .m = MODE_VGA, }, 885 { .w = 352, .h = 288, .m = MODE_CIF, }, 886 { .w = 320, .h = 240, .m = MODE_QVGA, }, 887 { .w = 176, .h = 144, .m = MODE_QCIF, }, 888}; 889 890static int stk_vidioc_g_fmt_vid_cap(struct file *filp, 891 void *priv, struct v4l2_format *f) 892{ 893 struct v4l2_pix_format *pix_format = &f->fmt.pix; 894 struct stk_camera *dev = video_drvdata(filp); 895 int i; 896 897 for (i = 0; i < ARRAY_SIZE(stk_sizes) && 898 stk_sizes[i].m != dev->vsettings.mode; i++) 899 ; 900 if (i == ARRAY_SIZE(stk_sizes)) { 901 pr_err("ERROR: mode invalid\n"); 902 return -EINVAL; 903 } 904 pix_format->width = stk_sizes[i].w; 905 pix_format->height = stk_sizes[i].h; 906 pix_format->field = V4L2_FIELD_NONE; 907 pix_format->colorspace = V4L2_COLORSPACE_SRGB; 908 pix_format->pixelformat = dev->vsettings.palette; 909 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8) 910 pix_format->bytesperline = pix_format->width; 911 else 912 pix_format->bytesperline = 2 * pix_format->width; 913 pix_format->sizeimage = pix_format->bytesperline 914 * pix_format->height; 915 return 0; 916} 917 918static int stk_try_fmt_vid_cap(struct file *filp, 919 struct v4l2_format *fmtd, int *idx) 920{ 921 int i; 922 switch (fmtd->fmt.pix.pixelformat) { 923 case V4L2_PIX_FMT_RGB565: 924 case V4L2_PIX_FMT_RGB565X: 925 case V4L2_PIX_FMT_UYVY: 926 case V4L2_PIX_FMT_YUYV: 927 case V4L2_PIX_FMT_SBGGR8: 928 break; 929 default: 930 return -EINVAL; 931 } 932 for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) { 933 if (fmtd->fmt.pix.width > stk_sizes[i].w) 934 break; 935 } 936 if (i == ARRAY_SIZE(stk_sizes) 937 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w) 938 < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) { 939 fmtd->fmt.pix.height = stk_sizes[i-1].h; 940 fmtd->fmt.pix.width = stk_sizes[i-1].w; 941 if (idx) 942 *idx = i - 1; 943 } else { 944 fmtd->fmt.pix.height = stk_sizes[i].h; 945 fmtd->fmt.pix.width = stk_sizes[i].w; 946 if (idx) 947 *idx = i; 948 } 949 950 fmtd->fmt.pix.field = V4L2_FIELD_NONE; 951 fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB; 952 if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8) 953 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width; 954 else 955 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width; 956 fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline 957 * fmtd->fmt.pix.height; 958 return 0; 959} 960 961static int stk_vidioc_try_fmt_vid_cap(struct file *filp, 962 void *priv, struct v4l2_format *fmtd) 963{ 964 return stk_try_fmt_vid_cap(filp, fmtd, NULL); 965} 966 967static int stk_setup_format(struct stk_camera *dev) 968{ 969 int i = 0; 970 int depth; 971 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8) 972 depth = 1; 973 else 974 depth = 2; 975 while (i < ARRAY_SIZE(stk_sizes) && 976 stk_sizes[i].m != dev->vsettings.mode) 977 i++; 978 if (i == ARRAY_SIZE(stk_sizes)) { 979 pr_err("Something is broken in %s\n", __func__); 980 return -EFAULT; 981 } 982 /* This registers controls some timings, not sure of what. */ 983 stk_camera_write_reg(dev, 0x001b, 0x0e); 984 if (dev->vsettings.mode == MODE_SXGA) 985 stk_camera_write_reg(dev, 0x001c, 0x0e); 986 else 987 stk_camera_write_reg(dev, 0x001c, 0x46); 988 /* 989 * Registers 0x0115 0x0114 are the size of each line (bytes), 990 * regs 0x0117 0x0116 are the height of the image. 991 */ 992 stk_camera_write_reg(dev, 0x0115, 993 ((stk_sizes[i].w * depth) >> 8) & 0xff); 994 stk_camera_write_reg(dev, 0x0114, 995 (stk_sizes[i].w * depth) & 0xff); 996 stk_camera_write_reg(dev, 0x0117, 997 (stk_sizes[i].h >> 8) & 0xff); 998 stk_camera_write_reg(dev, 0x0116, 999 stk_sizes[i].h & 0xff); 1000 return stk_sensor_configure(dev); 1001} 1002 1003static int stk_vidioc_s_fmt_vid_cap(struct file *filp, 1004 void *priv, struct v4l2_format *fmtd) 1005{ 1006 int ret; 1007 int idx; 1008 struct stk_camera *dev = video_drvdata(filp); 1009 1010 if (dev == NULL) 1011 return -ENODEV; 1012 if (!is_present(dev)) 1013 return -ENODEV; 1014 if (is_streaming(dev)) 1015 return -EBUSY; 1016 if (dev->owner) 1017 return -EBUSY; 1018 ret = stk_try_fmt_vid_cap(filp, fmtd, &idx); 1019 if (ret) 1020 return ret; 1021 1022 dev->vsettings.palette = fmtd->fmt.pix.pixelformat; 1023 stk_free_buffers(dev); 1024 dev->frame_size = fmtd->fmt.pix.sizeimage; 1025 dev->vsettings.mode = stk_sizes[idx].m; 1026 1027 stk_initialise(dev); 1028 return stk_setup_format(dev); 1029} 1030 1031static int stk_vidioc_reqbufs(struct file *filp, 1032 void *priv, struct v4l2_requestbuffers *rb) 1033{ 1034 struct stk_camera *dev = video_drvdata(filp); 1035 1036 if (dev == NULL) 1037 return -ENODEV; 1038 if (rb->memory != V4L2_MEMORY_MMAP) 1039 return -EINVAL; 1040 if (is_streaming(dev) 1041 || (dev->owner && dev->owner != filp)) 1042 return -EBUSY; 1043 stk_free_buffers(dev); 1044 if (rb->count == 0) { 1045 stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */ 1046 unset_initialised(dev); 1047 dev->owner = NULL; 1048 return 0; 1049 } 1050 dev->owner = filp; 1051 1052 /*FIXME If they ask for zero, we must stop streaming and free */ 1053 if (rb->count < 3) 1054 rb->count = 3; 1055 /* Arbitrary limit */ 1056 else if (rb->count > 5) 1057 rb->count = 5; 1058 1059 stk_allocate_buffers(dev, rb->count); 1060 rb->count = dev->n_sbufs; 1061 return 0; 1062} 1063 1064static int stk_vidioc_querybuf(struct file *filp, 1065 void *priv, struct v4l2_buffer *buf) 1066{ 1067 struct stk_camera *dev = video_drvdata(filp); 1068 struct stk_sio_buffer *sbuf; 1069 1070 if (buf->index >= dev->n_sbufs) 1071 return -EINVAL; 1072 sbuf = dev->sio_bufs + buf->index; 1073 *buf = sbuf->v4lbuf; 1074 return 0; 1075} 1076 1077static int stk_vidioc_qbuf(struct file *filp, 1078 void *priv, struct v4l2_buffer *buf) 1079{ 1080 struct stk_camera *dev = video_drvdata(filp); 1081 struct stk_sio_buffer *sbuf; 1082 unsigned long flags; 1083 1084 if (buf->memory != V4L2_MEMORY_MMAP) 1085 return -EINVAL; 1086 1087 if (buf->index >= dev->n_sbufs) 1088 return -EINVAL; 1089 sbuf = dev->sio_bufs + buf->index; 1090 if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED) 1091 return 0; 1092 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED; 1093 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE; 1094 spin_lock_irqsave(&dev->spinlock, flags); 1095 list_add_tail(&sbuf->list, &dev->sio_avail); 1096 *buf = sbuf->v4lbuf; 1097 spin_unlock_irqrestore(&dev->spinlock, flags); 1098 return 0; 1099} 1100 1101static int stk_vidioc_dqbuf(struct file *filp, 1102 void *priv, struct v4l2_buffer *buf) 1103{ 1104 struct stk_camera *dev = video_drvdata(filp); 1105 struct stk_sio_buffer *sbuf; 1106 unsigned long flags; 1107 int ret; 1108 1109 if (!is_streaming(dev)) 1110 return -EINVAL; 1111 1112 if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full)) 1113 return -EWOULDBLOCK; 1114 ret = wait_event_interruptible(dev->wait_frame, 1115 !list_empty(&dev->sio_full) || !is_present(dev)); 1116 if (ret) 1117 return ret; 1118 if (!is_present(dev)) 1119 return -EIO; 1120 1121 spin_lock_irqsave(&dev->spinlock, flags); 1122 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list); 1123 list_del_init(&sbuf->list); 1124 spin_unlock_irqrestore(&dev->spinlock, flags); 1125 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED; 1126 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE; 1127 sbuf->v4lbuf.sequence = ++dev->sequence; 1128 v4l2_buffer_set_timestamp(&sbuf->v4lbuf, ktime_get_ns()); 1129 1130 *buf = sbuf->v4lbuf; 1131 return 0; 1132} 1133 1134static int stk_vidioc_streamon(struct file *filp, 1135 void *priv, enum v4l2_buf_type type) 1136{ 1137 struct stk_camera *dev = video_drvdata(filp); 1138 if (is_streaming(dev)) 1139 return 0; 1140 if (dev->sio_bufs == NULL) 1141 return -EINVAL; 1142 dev->sequence = 0; 1143 return stk_start_stream(dev); 1144} 1145 1146static int stk_vidioc_streamoff(struct file *filp, 1147 void *priv, enum v4l2_buf_type type) 1148{ 1149 struct stk_camera *dev = video_drvdata(filp); 1150 unsigned long flags; 1151 int i; 1152 stk_stop_stream(dev); 1153 spin_lock_irqsave(&dev->spinlock, flags); 1154 INIT_LIST_HEAD(&dev->sio_avail); 1155 INIT_LIST_HEAD(&dev->sio_full); 1156 for (i = 0; i < dev->n_sbufs; i++) { 1157 INIT_LIST_HEAD(&dev->sio_bufs[i].list); 1158 dev->sio_bufs[i].v4lbuf.flags = 0; 1159 } 1160 spin_unlock_irqrestore(&dev->spinlock, flags); 1161 return 0; 1162} 1163 1164 1165static int stk_vidioc_g_parm(struct file *filp, 1166 void *priv, struct v4l2_streamparm *sp) 1167{ 1168 /*FIXME This is not correct */ 1169 sp->parm.capture.timeperframe.numerator = 1; 1170 sp->parm.capture.timeperframe.denominator = 30; 1171 sp->parm.capture.readbuffers = 2; 1172 return 0; 1173} 1174 1175static int stk_vidioc_enum_framesizes(struct file *filp, 1176 void *priv, struct v4l2_frmsizeenum *frms) 1177{ 1178 if (frms->index >= ARRAY_SIZE(stk_sizes)) 1179 return -EINVAL; 1180 switch (frms->pixel_format) { 1181 case V4L2_PIX_FMT_RGB565: 1182 case V4L2_PIX_FMT_RGB565X: 1183 case V4L2_PIX_FMT_UYVY: 1184 case V4L2_PIX_FMT_YUYV: 1185 case V4L2_PIX_FMT_SBGGR8: 1186 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE; 1187 frms->discrete.width = stk_sizes[frms->index].w; 1188 frms->discrete.height = stk_sizes[frms->index].h; 1189 return 0; 1190 default: return -EINVAL; 1191 } 1192} 1193 1194static const struct v4l2_ctrl_ops stk_ctrl_ops = { 1195 .s_ctrl = stk_s_ctrl, 1196}; 1197 1198static const struct v4l2_file_operations v4l_stk_fops = { 1199 .owner = THIS_MODULE, 1200 .open = v4l_stk_open, 1201 .release = v4l_stk_release, 1202 .read = v4l_stk_read, 1203 .poll = v4l_stk_poll, 1204 .mmap = v4l_stk_mmap, 1205 .unlocked_ioctl = video_ioctl2, 1206}; 1207 1208static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = { 1209 .vidioc_querycap = stk_vidioc_querycap, 1210 .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap, 1211 .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap, 1212 .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap, 1213 .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap, 1214 .vidioc_enum_input = stk_vidioc_enum_input, 1215 .vidioc_s_input = stk_vidioc_s_input, 1216 .vidioc_g_input = stk_vidioc_g_input, 1217 .vidioc_reqbufs = stk_vidioc_reqbufs, 1218 .vidioc_querybuf = stk_vidioc_querybuf, 1219 .vidioc_qbuf = stk_vidioc_qbuf, 1220 .vidioc_dqbuf = stk_vidioc_dqbuf, 1221 .vidioc_streamon = stk_vidioc_streamon, 1222 .vidioc_streamoff = stk_vidioc_streamoff, 1223 .vidioc_g_parm = stk_vidioc_g_parm, 1224 .vidioc_enum_framesizes = stk_vidioc_enum_framesizes, 1225 .vidioc_log_status = v4l2_ctrl_log_status, 1226 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 1227 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1228}; 1229 1230static void stk_v4l_dev_release(struct video_device *vd) 1231{ 1232 struct stk_camera *dev = vdev_to_camera(vd); 1233 1234 if (dev->sio_bufs != NULL || dev->isobufs != NULL) 1235 pr_err("We are leaking memory\n"); 1236 usb_put_intf(dev->interface); 1237} 1238 1239static const struct video_device stk_v4l_data = { 1240 .name = "stkwebcam", 1241 .fops = &v4l_stk_fops, 1242 .ioctl_ops = &v4l_stk_ioctl_ops, 1243 .release = stk_v4l_dev_release, 1244}; 1245 1246 1247static int stk_register_video_device(struct stk_camera *dev) 1248{ 1249 int err; 1250 1251 dev->vdev = stk_v4l_data; 1252 dev->vdev.lock = &dev->lock; 1253 dev->vdev.v4l2_dev = &dev->v4l2_dev; 1254 dev->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | 1255 V4L2_CAP_STREAMING; 1256 video_set_drvdata(&dev->vdev, dev); 1257 err = video_register_device(&dev->vdev, VFL_TYPE_VIDEO, -1); 1258 if (err) 1259 pr_err("v4l registration failed\n"); 1260 else 1261 pr_info("Syntek USB2.0 Camera is now controlling device %s\n", 1262 video_device_node_name(&dev->vdev)); 1263 return err; 1264} 1265 1266 1267/* USB Stuff */ 1268 1269static int stk_camera_probe(struct usb_interface *interface, 1270 const struct usb_device_id *id) 1271{ 1272 struct v4l2_ctrl_handler *hdl; 1273 int err = 0; 1274 int i; 1275 1276 struct stk_camera *dev = NULL; 1277 struct usb_device *udev = interface_to_usbdev(interface); 1278 struct usb_host_interface *iface_desc; 1279 struct usb_endpoint_descriptor *endpoint; 1280 1281 dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL); 1282 if (dev == NULL) { 1283 pr_err("Out of memory !\n"); 1284 return -ENOMEM; 1285 } 1286 err = v4l2_device_register(&interface->dev, &dev->v4l2_dev); 1287 if (err < 0) { 1288 dev_err(&udev->dev, "couldn't register v4l2_device\n"); 1289 kfree(dev); 1290 return err; 1291 } 1292 hdl = &dev->hdl; 1293 v4l2_ctrl_handler_init(hdl, 3); 1294 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops, 1295 V4L2_CID_BRIGHTNESS, 0, 0xff, 0x1, 0x60); 1296 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops, 1297 V4L2_CID_HFLIP, 0, 1, 1, 1); 1298 v4l2_ctrl_new_std(hdl, &stk_ctrl_ops, 1299 V4L2_CID_VFLIP, 0, 1, 1, 1); 1300 if (hdl->error) { 1301 err = hdl->error; 1302 dev_err(&udev->dev, "couldn't register control\n"); 1303 goto error; 1304 } 1305 dev->v4l2_dev.ctrl_handler = hdl; 1306 1307 spin_lock_init(&dev->spinlock); 1308 mutex_init(&dev->lock); 1309 init_waitqueue_head(&dev->wait_frame); 1310 dev->first_init = 1; /* webcam LED management */ 1311 1312 dev->udev = udev; 1313 dev->interface = interface; 1314 usb_get_intf(interface); 1315 1316 if (hflip != -1) 1317 dev->vsettings.hflip = hflip; 1318 else if (dmi_check_system(stk_upside_down_dmi_table)) 1319 dev->vsettings.hflip = 1; 1320 else 1321 dev->vsettings.hflip = 0; 1322 if (vflip != -1) 1323 dev->vsettings.vflip = vflip; 1324 else if (dmi_check_system(stk_upside_down_dmi_table)) 1325 dev->vsettings.vflip = 1; 1326 else 1327 dev->vsettings.vflip = 0; 1328 dev->n_sbufs = 0; 1329 set_present(dev); 1330 1331 /* Set up the endpoint information 1332 * use only the first isoc-in endpoint 1333 * for the current alternate setting */ 1334 iface_desc = interface->cur_altsetting; 1335 1336 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 1337 endpoint = &iface_desc->endpoint[i].desc; 1338 1339 if (!dev->isoc_ep 1340 && usb_endpoint_is_isoc_in(endpoint)) { 1341 /* we found an isoc in endpoint */ 1342 dev->isoc_ep = usb_endpoint_num(endpoint); 1343 break; 1344 } 1345 } 1346 if (!dev->isoc_ep) { 1347 pr_err("Could not find isoc-in endpoint\n"); 1348 err = -ENODEV; 1349 goto error_put; 1350 } 1351 dev->vsettings.palette = V4L2_PIX_FMT_RGB565; 1352 dev->vsettings.mode = MODE_VGA; 1353 dev->frame_size = 640 * 480 * 2; 1354 1355 INIT_LIST_HEAD(&dev->sio_avail); 1356 INIT_LIST_HEAD(&dev->sio_full); 1357 1358 usb_set_intfdata(interface, dev); 1359 1360 err = stk_register_video_device(dev); 1361 if (err) 1362 goto error_put; 1363 1364 return 0; 1365 1366error_put: 1367 usb_put_intf(interface); 1368error: 1369 v4l2_ctrl_handler_free(hdl); 1370 v4l2_device_unregister(&dev->v4l2_dev); 1371 kfree(dev); 1372 return err; 1373} 1374 1375static void stk_camera_disconnect(struct usb_interface *interface) 1376{ 1377 struct stk_camera *dev = usb_get_intfdata(interface); 1378 1379 usb_set_intfdata(interface, NULL); 1380 unset_present(dev); 1381 1382 wake_up_interruptible(&dev->wait_frame); 1383 1384 pr_info("Syntek USB2.0 Camera release resources device %s\n", 1385 video_device_node_name(&dev->vdev)); 1386 1387 video_unregister_device(&dev->vdev); 1388 v4l2_ctrl_handler_free(&dev->hdl); 1389 v4l2_device_unregister(&dev->v4l2_dev); 1390 kfree(dev); 1391} 1392 1393#ifdef CONFIG_PM 1394static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message) 1395{ 1396 struct stk_camera *dev = usb_get_intfdata(intf); 1397 if (is_streaming(dev)) { 1398 stk_stop_stream(dev); 1399 /* yes, this is ugly */ 1400 set_streaming(dev); 1401 } 1402 return 0; 1403} 1404 1405static int stk_camera_resume(struct usb_interface *intf) 1406{ 1407 struct stk_camera *dev = usb_get_intfdata(intf); 1408 if (!is_initialised(dev)) 1409 return 0; 1410 unset_initialised(dev); 1411 stk_initialise(dev); 1412 stk_camera_write_reg(dev, 0x0, 0x49); 1413 stk_setup_format(dev); 1414 if (is_streaming(dev)) 1415 stk_start_stream(dev); 1416 return 0; 1417} 1418#endif 1419 1420static struct usb_driver stk_camera_driver = { 1421 .name = "stkwebcam", 1422 .probe = stk_camera_probe, 1423 .disconnect = stk_camera_disconnect, 1424 .id_table = stkwebcam_table, 1425#ifdef CONFIG_PM 1426 .suspend = stk_camera_suspend, 1427 .resume = stk_camera_resume, 1428#endif 1429}; 1430 1431module_usb_driver(stk_camera_driver); 1432