Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /*************************************************************************** |
| 2 | * V4L2 driver for SN9C10x PC Camera Controllers * |
| 3 | * * |
| 4 | * Copyright (C) 2004-2005 by Luca Risolia <luca.risolia@studio.unibo.it> * |
| 5 | * * |
| 6 | * This program is free software; you can redistribute it and/or modify * |
| 7 | * it under the terms of the GNU General Public License as published by * |
| 8 | * the Free Software Foundation; either version 2 of the License, or * |
| 9 | * (at your option) any later version. * |
| 10 | * * |
| 11 | * This program is distributed in the hope that it will be useful, * |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
| 14 | * GNU General Public License for more details. * |
| 15 | * * |
| 16 | * You should have received a copy of the GNU General Public License * |
| 17 | * along with this program; if not, write to the Free Software * |
| 18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * |
| 19 | ***************************************************************************/ |
| 20 | |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/param.h> |
| 25 | #include <linux/moduleparam.h> |
| 26 | #include <linux/errno.h> |
| 27 | #include <linux/slab.h> |
| 28 | #include <linux/string.h> |
| 29 | #include <linux/device.h> |
| 30 | #include <linux/fs.h> |
| 31 | #include <linux/delay.h> |
| 32 | #include <linux/stddef.h> |
| 33 | #include <linux/compiler.h> |
| 34 | #include <linux/ioctl.h> |
| 35 | #include <linux/poll.h> |
| 36 | #include <linux/stat.h> |
| 37 | #include <linux/mm.h> |
| 38 | #include <linux/vmalloc.h> |
| 39 | #include <linux/page-flags.h> |
| 40 | #include <linux/byteorder/generic.h> |
| 41 | #include <asm/page.h> |
| 42 | #include <asm/uaccess.h> |
| 43 | |
| 44 | #include "sn9c102.h" |
| 45 | |
| 46 | /*****************************************************************************/ |
| 47 | |
| 48 | MODULE_DEVICE_TABLE(usb, sn9c102_id_table); |
| 49 | |
| 50 | MODULE_AUTHOR(SN9C102_MODULE_AUTHOR " " SN9C102_AUTHOR_EMAIL); |
| 51 | MODULE_DESCRIPTION(SN9C102_MODULE_NAME); |
| 52 | MODULE_VERSION(SN9C102_MODULE_VERSION); |
| 53 | MODULE_LICENSE(SN9C102_MODULE_LICENSE); |
| 54 | |
| 55 | static short video_nr[] = {[0 ... SN9C102_MAX_DEVICES-1] = -1}; |
| 56 | module_param_array(video_nr, short, NULL, 0444); |
| 57 | MODULE_PARM_DESC(video_nr, |
| 58 | "\n<-1|n[,...]> Specify V4L2 minor mode number." |
| 59 | "\n -1 = use next available (default)" |
| 60 | "\n n = use minor number n (integer >= 0)" |
| 61 | "\nYou can specify up to "__MODULE_STRING(SN9C102_MAX_DEVICES) |
| 62 | " cameras this way." |
| 63 | "\nFor example:" |
| 64 | "\nvideo_nr=-1,2,-1 would assign minor number 2 to" |
| 65 | "\nthe second camera and use auto for the first" |
| 66 | "\none and for every other camera." |
| 67 | "\n"); |
| 68 | |
| 69 | static short force_munmap[] = {[0 ... SN9C102_MAX_DEVICES-1] = |
| 70 | SN9C102_FORCE_MUNMAP}; |
| 71 | module_param_array(force_munmap, bool, NULL, 0444); |
| 72 | MODULE_PARM_DESC(force_munmap, |
| 73 | "\n<0|1[,...]> Force the application to unmap previously " |
| 74 | "\nmapped buffer memory before calling any VIDIOC_S_CROP or " |
| 75 | "\nVIDIOC_S_FMT ioctl's. Not all the applications support " |
| 76 | "\nthis feature. This parameter is specific for each " |
| 77 | "\ndetected camera." |
| 78 | "\n 0 = do not force memory unmapping" |
| 79 | "\n 1 = force memory unmapping (save memory)" |
| 80 | "\nDefault value is "__MODULE_STRING(SN9C102_FORCE_MUNMAP)"." |
| 81 | "\n"); |
| 82 | |
| 83 | #ifdef SN9C102_DEBUG |
| 84 | static unsigned short debug = SN9C102_DEBUG_LEVEL; |
| 85 | module_param(debug, ushort, 0644); |
| 86 | MODULE_PARM_DESC(debug, |
| 87 | "\n<n> Debugging information level, from 0 to 3:" |
| 88 | "\n0 = none (use carefully)" |
| 89 | "\n1 = critical errors" |
| 90 | "\n2 = significant informations" |
| 91 | "\n3 = more verbose messages" |
| 92 | "\nLevel 3 is useful for testing only, when only " |
| 93 | "one device is used." |
| 94 | "\nDefault value is "__MODULE_STRING(SN9C102_DEBUG_LEVEL)"." |
| 95 | "\n"); |
| 96 | #endif |
| 97 | |
| 98 | /*****************************************************************************/ |
| 99 | |
| 100 | static sn9c102_sof_header_t sn9c102_sof_header[] = { |
| 101 | {0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96, 0x00}, |
| 102 | {0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96, 0x01}, |
| 103 | }; |
| 104 | |
| 105 | |
| 106 | static sn9c102_eof_header_t sn9c102_eof_header[] = { |
| 107 | {0x00, 0x00, 0x00, 0x00}, |
| 108 | {0x40, 0x00, 0x00, 0x00}, |
| 109 | {0x80, 0x00, 0x00, 0x00}, |
| 110 | {0xc0, 0x00, 0x00, 0x00}, |
| 111 | }; |
| 112 | |
| 113 | /*****************************************************************************/ |
| 114 | |
| 115 | static void* rvmalloc(size_t size) |
| 116 | { |
| 117 | void* mem; |
| 118 | unsigned long adr; |
| 119 | |
| 120 | size = PAGE_ALIGN(size); |
| 121 | |
| 122 | mem = vmalloc_32((unsigned long)size); |
| 123 | if (!mem) |
| 124 | return NULL; |
| 125 | |
| 126 | memset(mem, 0, size); |
| 127 | |
| 128 | adr = (unsigned long)mem; |
| 129 | while (size > 0) { |
| 130 | SetPageReserved(vmalloc_to_page((void *)adr)); |
| 131 | adr += PAGE_SIZE; |
| 132 | size -= PAGE_SIZE; |
| 133 | } |
| 134 | |
| 135 | return mem; |
| 136 | } |
| 137 | |
| 138 | |
| 139 | static void rvfree(void* mem, size_t size) |
| 140 | { |
| 141 | unsigned long adr; |
| 142 | |
| 143 | if (!mem) |
| 144 | return; |
| 145 | |
| 146 | size = PAGE_ALIGN(size); |
| 147 | |
| 148 | adr = (unsigned long)mem; |
| 149 | while (size > 0) { |
| 150 | ClearPageReserved(vmalloc_to_page((void *)adr)); |
| 151 | adr += PAGE_SIZE; |
| 152 | size -= PAGE_SIZE; |
| 153 | } |
| 154 | |
| 155 | vfree(mem); |
| 156 | } |
| 157 | |
| 158 | |
| 159 | static u32 |
| 160 | sn9c102_request_buffers(struct sn9c102_device* cam, u32 count, |
| 161 | enum sn9c102_io_method io) |
| 162 | { |
| 163 | struct v4l2_pix_format* p = &(cam->sensor->pix_format); |
| 164 | struct v4l2_rect* r = &(cam->sensor->cropcap.bounds); |
| 165 | const size_t imagesize = cam->module_param.force_munmap || |
| 166 | io == IO_READ ? |
| 167 | (p->width * p->height * p->priv) / 8 : |
| 168 | (r->width * r->height * p->priv) / 8; |
| 169 | void* buff = NULL; |
| 170 | u32 i; |
| 171 | |
| 172 | if (count > SN9C102_MAX_FRAMES) |
| 173 | count = SN9C102_MAX_FRAMES; |
| 174 | |
| 175 | cam->nbuffers = count; |
| 176 | while (cam->nbuffers > 0) { |
| 177 | if ((buff = rvmalloc(cam->nbuffers * PAGE_ALIGN(imagesize)))) |
| 178 | break; |
| 179 | cam->nbuffers--; |
| 180 | } |
| 181 | |
| 182 | for (i = 0; i < cam->nbuffers; i++) { |
| 183 | cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize); |
| 184 | cam->frame[i].buf.index = i; |
| 185 | cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize); |
| 186 | cam->frame[i].buf.length = imagesize; |
| 187 | cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 188 | cam->frame[i].buf.sequence = 0; |
| 189 | cam->frame[i].buf.field = V4L2_FIELD_NONE; |
| 190 | cam->frame[i].buf.memory = V4L2_MEMORY_MMAP; |
| 191 | cam->frame[i].buf.flags = 0; |
| 192 | } |
| 193 | |
| 194 | return cam->nbuffers; |
| 195 | } |
| 196 | |
| 197 | |
| 198 | static void sn9c102_release_buffers(struct sn9c102_device* cam) |
| 199 | { |
| 200 | if (cam->nbuffers) { |
| 201 | rvfree(cam->frame[0].bufmem, |
| 202 | cam->nbuffers * cam->frame[0].buf.length); |
| 203 | cam->nbuffers = 0; |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | |
| 208 | static void sn9c102_empty_framequeues(struct sn9c102_device* cam) |
| 209 | { |
| 210 | u32 i; |
| 211 | |
| 212 | INIT_LIST_HEAD(&cam->inqueue); |
| 213 | INIT_LIST_HEAD(&cam->outqueue); |
| 214 | |
| 215 | for (i = 0; i < SN9C102_MAX_FRAMES; i++) { |
| 216 | cam->frame[i].state = F_UNUSED; |
| 217 | cam->frame[i].buf.bytesused = 0; |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | |
| 222 | static void sn9c102_queue_unusedframes(struct sn9c102_device* cam) |
| 223 | { |
| 224 | unsigned long lock_flags; |
| 225 | u32 i; |
| 226 | |
| 227 | for (i = 0; i < cam->nbuffers; i++) |
| 228 | if (cam->frame[i].state == F_UNUSED) { |
| 229 | cam->frame[i].state = F_QUEUED; |
| 230 | spin_lock_irqsave(&cam->queue_lock, lock_flags); |
| 231 | list_add_tail(&cam->frame[i].frame, &cam->inqueue); |
| 232 | spin_unlock_irqrestore(&cam->queue_lock, lock_flags); |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | /*****************************************************************************/ |
| 237 | |
| 238 | int sn9c102_write_reg(struct sn9c102_device* cam, u8 value, u16 index) |
| 239 | { |
| 240 | struct usb_device* udev = cam->usbdev; |
| 241 | u8* buff = cam->control_buffer; |
| 242 | int res; |
| 243 | |
| 244 | *buff = value; |
| 245 | |
| 246 | res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41, |
| 247 | index, 0, buff, 1, SN9C102_CTRL_TIMEOUT); |
| 248 | if (res < 0) { |
| 249 | DBG(3, "Failed to write a register (value 0x%02X, index " |
| 250 | "0x%02X, error %d)", value, index, res) |
| 251 | return -1; |
| 252 | } |
| 253 | |
| 254 | cam->reg[index] = value; |
| 255 | |
| 256 | return 0; |
| 257 | } |
| 258 | |
| 259 | |
| 260 | /* NOTE: reading some registers always returns 0 */ |
| 261 | static int sn9c102_read_reg(struct sn9c102_device* cam, u16 index) |
| 262 | { |
| 263 | struct usb_device* udev = cam->usbdev; |
| 264 | u8* buff = cam->control_buffer; |
| 265 | int res; |
| 266 | |
| 267 | res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1, |
| 268 | index, 0, buff, 1, SN9C102_CTRL_TIMEOUT); |
| 269 | if (res < 0) |
| 270 | DBG(3, "Failed to read a register (index 0x%02X, error %d)", |
| 271 | index, res) |
| 272 | |
| 273 | return (res >= 0) ? (int)(*buff) : -1; |
| 274 | } |
| 275 | |
| 276 | |
| 277 | int sn9c102_pread_reg(struct sn9c102_device* cam, u16 index) |
| 278 | { |
| 279 | if (index > 0x1f) |
| 280 | return -EINVAL; |
| 281 | |
| 282 | return cam->reg[index]; |
| 283 | } |
| 284 | |
| 285 | |
| 286 | static int |
| 287 | sn9c102_i2c_wait(struct sn9c102_device* cam, struct sn9c102_sensor* sensor) |
| 288 | { |
| 289 | int i, r; |
| 290 | |
| 291 | for (i = 1; i <= 5; i++) { |
| 292 | r = sn9c102_read_reg(cam, 0x08); |
| 293 | if (r < 0) |
| 294 | return -EIO; |
| 295 | if (r & 0x04) |
| 296 | return 0; |
| 297 | if (sensor->frequency & SN9C102_I2C_400KHZ) |
| 298 | udelay(5*16); |
| 299 | else |
| 300 | udelay(16*16); |
| 301 | } |
| 302 | return -EBUSY; |
| 303 | } |
| 304 | |
| 305 | |
| 306 | static int |
| 307 | sn9c102_i2c_detect_read_error(struct sn9c102_device* cam, |
| 308 | struct sn9c102_sensor* sensor) |
| 309 | { |
| 310 | int r; |
| 311 | r = sn9c102_read_reg(cam, 0x08); |
| 312 | return (r < 0 || (r >= 0 && !(r & 0x08))) ? -EIO : 0; |
| 313 | } |
| 314 | |
| 315 | |
| 316 | static int |
| 317 | sn9c102_i2c_detect_write_error(struct sn9c102_device* cam, |
| 318 | struct sn9c102_sensor* sensor) |
| 319 | { |
| 320 | int r; |
| 321 | r = sn9c102_read_reg(cam, 0x08); |
| 322 | return (r < 0 || (r >= 0 && (r & 0x08))) ? -EIO : 0; |
| 323 | } |
| 324 | |
| 325 | |
| 326 | int |
| 327 | sn9c102_i2c_try_raw_read(struct sn9c102_device* cam, |
| 328 | struct sn9c102_sensor* sensor, u8 data0, u8 data1, |
| 329 | u8 n, u8 buffer[]) |
| 330 | { |
| 331 | struct usb_device* udev = cam->usbdev; |
| 332 | u8* data = cam->control_buffer; |
| 333 | int err = 0, res; |
| 334 | |
| 335 | /* Write cycle */ |
| 336 | data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) | |
| 337 | ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) | 0x10; |
| 338 | data[1] = data0; /* I2C slave id */ |
| 339 | data[2] = data1; /* address */ |
| 340 | data[7] = 0x10; |
| 341 | res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41, |
| 342 | 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT); |
| 343 | if (res < 0) |
| 344 | err += res; |
| 345 | |
| 346 | err += sn9c102_i2c_wait(cam, sensor); |
| 347 | |
| 348 | /* Read cycle - n bytes */ |
| 349 | data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) | |
| 350 | ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) | |
| 351 | (n << 4) | 0x02; |
| 352 | data[1] = data0; |
| 353 | data[7] = 0x10; |
| 354 | res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41, |
| 355 | 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT); |
| 356 | if (res < 0) |
| 357 | err += res; |
| 358 | |
| 359 | err += sn9c102_i2c_wait(cam, sensor); |
| 360 | |
| 361 | /* The first read byte will be placed in data[4] */ |
| 362 | res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1, |
| 363 | 0x0a, 0, data, 5, SN9C102_CTRL_TIMEOUT); |
| 364 | if (res < 0) |
| 365 | err += res; |
| 366 | |
| 367 | err += sn9c102_i2c_detect_read_error(cam, sensor); |
| 368 | |
| 369 | PDBGG("I2C read: address 0x%02X, first read byte: 0x%02X", data1, |
| 370 | data[4]) |
| 371 | |
| 372 | if (err) { |
| 373 | DBG(3, "I2C read failed for %s image sensor", sensor->name) |
| 374 | return -1; |
| 375 | } |
| 376 | |
| 377 | if (buffer) |
| 378 | memcpy(buffer, data, sizeof(buffer)); |
| 379 | |
| 380 | return (int)data[4]; |
| 381 | } |
| 382 | |
| 383 | |
| 384 | int |
| 385 | sn9c102_i2c_try_raw_write(struct sn9c102_device* cam, |
| 386 | struct sn9c102_sensor* sensor, u8 n, u8 data0, |
| 387 | u8 data1, u8 data2, u8 data3, u8 data4, u8 data5) |
| 388 | { |
| 389 | struct usb_device* udev = cam->usbdev; |
| 390 | u8* data = cam->control_buffer; |
| 391 | int err = 0, res; |
| 392 | |
| 393 | /* Write cycle. It usually is address + value */ |
| 394 | data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) | |
| 395 | ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) |
| 396 | | ((n - 1) << 4); |
| 397 | data[1] = data0; |
| 398 | data[2] = data1; |
| 399 | data[3] = data2; |
| 400 | data[4] = data3; |
| 401 | data[5] = data4; |
| 402 | data[6] = data5; |
| 403 | data[7] = 0x14; |
| 404 | res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41, |
| 405 | 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT); |
| 406 | if (res < 0) |
| 407 | err += res; |
| 408 | |
| 409 | err += sn9c102_i2c_wait(cam, sensor); |
| 410 | err += sn9c102_i2c_detect_write_error(cam, sensor); |
| 411 | |
| 412 | if (err) |
| 413 | DBG(3, "I2C write failed for %s image sensor", sensor->name) |
| 414 | |
| 415 | PDBGG("I2C raw write: %u bytes, data0 = 0x%02X, data1 = 0x%02X, " |
| 416 | "data2 = 0x%02X, data3 = 0x%02X, data4 = 0x%02X, data5 = 0x%02X", |
| 417 | n, data0, data1, data2, data3, data4, data5) |
| 418 | |
| 419 | return err ? -1 : 0; |
| 420 | } |
| 421 | |
| 422 | |
| 423 | int |
| 424 | sn9c102_i2c_try_read(struct sn9c102_device* cam, |
| 425 | struct sn9c102_sensor* sensor, u8 address) |
| 426 | { |
| 427 | return sn9c102_i2c_try_raw_read(cam, sensor, sensor->i2c_slave_id, |
| 428 | address, 1, NULL); |
| 429 | } |
| 430 | |
| 431 | |
Luca Risolia | b9df978 | 2005-06-25 16:30:24 +0200 | [diff] [blame] | 432 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | sn9c102_i2c_try_write(struct sn9c102_device* cam, |
| 434 | struct sn9c102_sensor* sensor, u8 address, u8 value) |
| 435 | { |
| 436 | return sn9c102_i2c_try_raw_write(cam, sensor, 3, |
| 437 | sensor->i2c_slave_id, address, |
| 438 | value, 0, 0, 0); |
| 439 | } |
| 440 | |
| 441 | |
| 442 | int sn9c102_i2c_read(struct sn9c102_device* cam, u8 address) |
| 443 | { |
| 444 | if (!cam->sensor) |
| 445 | return -1; |
| 446 | |
| 447 | return sn9c102_i2c_try_read(cam, cam->sensor, address); |
| 448 | } |
| 449 | |
| 450 | |
| 451 | int sn9c102_i2c_write(struct sn9c102_device* cam, u8 address, u8 value) |
| 452 | { |
| 453 | if (!cam->sensor) |
| 454 | return -1; |
| 455 | |
| 456 | return sn9c102_i2c_try_write(cam, cam->sensor, address, value); |
| 457 | } |
| 458 | |
| 459 | /*****************************************************************************/ |
| 460 | |
| 461 | static void* |
| 462 | sn9c102_find_sof_header(struct sn9c102_device* cam, void* mem, size_t len) |
| 463 | { |
| 464 | size_t soflen = sizeof(sn9c102_sof_header_t), i; |
| 465 | u8 j, n = sizeof(sn9c102_sof_header) / soflen; |
| 466 | |
| 467 | for (i = 0; (len >= soflen) && (i <= len - soflen); i++) |
| 468 | for (j = 0; j < n; j++) |
| 469 | /* It's enough to compare 7 bytes */ |
| 470 | if (!memcmp(mem + i, sn9c102_sof_header[j], 7)) { |
| 471 | memcpy(cam->sof_header, mem + i, soflen); |
| 472 | /* Skip the header */ |
| 473 | return mem + i + soflen; |
| 474 | } |
| 475 | |
| 476 | return NULL; |
| 477 | } |
| 478 | |
| 479 | |
| 480 | static void* |
| 481 | sn9c102_find_eof_header(struct sn9c102_device* cam, void* mem, size_t len) |
| 482 | { |
| 483 | size_t eoflen = sizeof(sn9c102_eof_header_t), i; |
| 484 | unsigned j, n = sizeof(sn9c102_eof_header) / eoflen; |
| 485 | |
| 486 | if (cam->sensor->pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X) |
| 487 | return NULL; /* EOF header does not exist in compressed data */ |
| 488 | |
| 489 | for (i = 0; (len >= eoflen) && (i <= len - eoflen); i++) |
| 490 | for (j = 0; j < n; j++) |
| 491 | if (!memcmp(mem + i, sn9c102_eof_header[j], eoflen)) |
| 492 | return mem + i; |
| 493 | |
| 494 | return NULL; |
| 495 | } |
| 496 | |
| 497 | |
| 498 | static void sn9c102_urb_complete(struct urb *urb, struct pt_regs* regs) |
| 499 | { |
| 500 | struct sn9c102_device* cam = urb->context; |
| 501 | struct sn9c102_frame_t** f; |
| 502 | size_t imagesize; |
| 503 | unsigned long lock_flags; |
| 504 | u8 i; |
| 505 | int err = 0; |
| 506 | |
| 507 | if (urb->status == -ENOENT) |
| 508 | return; |
| 509 | |
| 510 | f = &cam->frame_current; |
| 511 | |
| 512 | if (cam->stream == STREAM_INTERRUPT) { |
| 513 | cam->stream = STREAM_OFF; |
| 514 | if ((*f)) |
| 515 | (*f)->state = F_QUEUED; |
| 516 | DBG(3, "Stream interrupted") |
| 517 | wake_up_interruptible(&cam->wait_stream); |
| 518 | } |
| 519 | |
| 520 | if (cam->state & DEV_DISCONNECTED) |
| 521 | return; |
| 522 | |
| 523 | if (cam->state & DEV_MISCONFIGURED) { |
| 524 | wake_up_interruptible(&cam->wait_frame); |
| 525 | return; |
| 526 | } |
| 527 | |
| 528 | if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue)) |
| 529 | goto resubmit_urb; |
| 530 | |
| 531 | if (!(*f)) |
| 532 | (*f) = list_entry(cam->inqueue.next, struct sn9c102_frame_t, |
| 533 | frame); |
| 534 | |
| 535 | imagesize = (cam->sensor->pix_format.width * |
| 536 | cam->sensor->pix_format.height * |
| 537 | cam->sensor->pix_format.priv) / 8; |
| 538 | |
| 539 | for (i = 0; i < urb->number_of_packets; i++) { |
| 540 | unsigned int img, len, status; |
| 541 | void *pos, *sof, *eof; |
| 542 | |
| 543 | len = urb->iso_frame_desc[i].actual_length; |
| 544 | status = urb->iso_frame_desc[i].status; |
| 545 | pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer; |
| 546 | |
| 547 | if (status) { |
| 548 | DBG(3, "Error in isochronous frame") |
| 549 | (*f)->state = F_ERROR; |
| 550 | continue; |
| 551 | } |
| 552 | |
| 553 | PDBGG("Isochrnous frame: length %u, #%u i", len, i) |
| 554 | |
| 555 | /* |
| 556 | NOTE: It is probably correct to assume that SOF and EOF |
| 557 | headers do not occur between two consecutive packets, |
| 558 | but who knows..Whatever is the truth, this assumption |
| 559 | doesn't introduce bugs. |
| 560 | */ |
| 561 | |
| 562 | redo: |
| 563 | sof = sn9c102_find_sof_header(cam, pos, len); |
| 564 | if (!sof) { |
| 565 | eof = sn9c102_find_eof_header(cam, pos, len); |
| 566 | if ((*f)->state == F_GRABBING) { |
| 567 | end_of_frame: |
| 568 | img = len; |
| 569 | |
| 570 | if (eof) |
| 571 | img = (eof > pos) ? eof - pos - 1 : 0; |
| 572 | |
| 573 | if ((*f)->buf.bytesused+img > imagesize) { |
| 574 | u32 b = (*f)->buf.bytesused + img - |
| 575 | imagesize; |
| 576 | img = imagesize - (*f)->buf.bytesused; |
| 577 | DBG(3, "Expected EOF not found: " |
| 578 | "video frame cut") |
| 579 | if (eof) |
| 580 | DBG(3, "Exceeded limit: +%u " |
| 581 | "bytes", (unsigned)(b)) |
| 582 | } |
| 583 | |
| 584 | memcpy((*f)->bufmem + (*f)->buf.bytesused, pos, |
| 585 | img); |
| 586 | |
| 587 | if ((*f)->buf.bytesused == 0) |
| 588 | do_gettimeofday(&(*f)->buf.timestamp); |
| 589 | |
| 590 | (*f)->buf.bytesused += img; |
| 591 | |
| 592 | if ((*f)->buf.bytesused == imagesize || |
| 593 | (cam->sensor->pix_format.pixelformat == |
| 594 | V4L2_PIX_FMT_SN9C10X && eof)) { |
| 595 | u32 b = (*f)->buf.bytesused; |
| 596 | (*f)->state = F_DONE; |
| 597 | (*f)->buf.sequence= ++cam->frame_count; |
| 598 | spin_lock_irqsave(&cam->queue_lock, |
| 599 | lock_flags); |
| 600 | list_move_tail(&(*f)->frame, |
| 601 | &cam->outqueue); |
| 602 | if (!list_empty(&cam->inqueue)) |
| 603 | (*f) = list_entry( |
| 604 | cam->inqueue.next, |
| 605 | struct sn9c102_frame_t, |
| 606 | frame ); |
| 607 | else |
| 608 | (*f) = NULL; |
| 609 | spin_unlock_irqrestore(&cam->queue_lock |
| 610 | , lock_flags); |
| 611 | memcpy(cam->sysfs.frame_header, |
| 612 | cam->sof_header, |
| 613 | sizeof(sn9c102_sof_header_t)); |
| 614 | DBG(3, "Video frame captured: " |
| 615 | "%lu bytes", (unsigned long)(b)) |
| 616 | |
| 617 | if (!(*f)) |
| 618 | goto resubmit_urb; |
| 619 | |
| 620 | } else if (eof) { |
| 621 | (*f)->state = F_ERROR; |
| 622 | DBG(3, "Not expected EOF after %lu " |
| 623 | "bytes of image data", |
| 624 | (unsigned long)((*f)->buf.bytesused)) |
| 625 | } |
| 626 | |
| 627 | if (sof) /* (1) */ |
| 628 | goto start_of_frame; |
| 629 | |
| 630 | } else if (eof) { |
| 631 | DBG(3, "EOF without SOF") |
| 632 | continue; |
| 633 | |
| 634 | } else { |
| 635 | PDBGG("Ignoring pointless isochronous frame") |
| 636 | continue; |
| 637 | } |
| 638 | |
| 639 | } else if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR) { |
| 640 | start_of_frame: |
| 641 | (*f)->state = F_GRABBING; |
| 642 | (*f)->buf.bytesused = 0; |
| 643 | len -= (sof - pos); |
| 644 | pos = sof; |
| 645 | DBG(3, "SOF detected: new video frame") |
| 646 | if (len) |
| 647 | goto redo; |
| 648 | |
| 649 | } else if ((*f)->state == F_GRABBING) { |
| 650 | eof = sn9c102_find_eof_header(cam, pos, len); |
| 651 | if (eof && eof < sof) |
| 652 | goto end_of_frame; /* (1) */ |
| 653 | else { |
| 654 | if (cam->sensor->pix_format.pixelformat == |
| 655 | V4L2_PIX_FMT_SN9C10X) { |
| 656 | eof = sof-sizeof(sn9c102_sof_header_t); |
| 657 | goto end_of_frame; |
| 658 | } else { |
| 659 | DBG(3, "SOF before expected EOF after " |
| 660 | "%lu bytes of image data", |
| 661 | (unsigned long)((*f)->buf.bytesused)) |
| 662 | goto start_of_frame; |
| 663 | } |
| 664 | } |
| 665 | } |
| 666 | } |
| 667 | |
| 668 | resubmit_urb: |
| 669 | urb->dev = cam->usbdev; |
| 670 | err = usb_submit_urb(urb, GFP_ATOMIC); |
| 671 | if (err < 0 && err != -EPERM) { |
| 672 | cam->state |= DEV_MISCONFIGURED; |
| 673 | DBG(1, "usb_submit_urb() failed") |
| 674 | } |
| 675 | |
| 676 | wake_up_interruptible(&cam->wait_frame); |
| 677 | } |
| 678 | |
| 679 | |
| 680 | static int sn9c102_start_transfer(struct sn9c102_device* cam) |
| 681 | { |
| 682 | struct usb_device *udev = cam->usbdev; |
| 683 | struct urb* urb; |
| 684 | const unsigned int wMaxPacketSize[] = {0, 128, 256, 384, 512, |
| 685 | 680, 800, 900, 1023}; |
| 686 | const unsigned int psz = wMaxPacketSize[SN9C102_ALTERNATE_SETTING]; |
| 687 | s8 i, j; |
| 688 | int err = 0; |
| 689 | |
| 690 | for (i = 0; i < SN9C102_URBS; i++) { |
| 691 | cam->transfer_buffer[i] = kmalloc(SN9C102_ISO_PACKETS * psz, |
| 692 | GFP_KERNEL); |
| 693 | if (!cam->transfer_buffer[i]) { |
| 694 | err = -ENOMEM; |
| 695 | DBG(1, "Not enough memory") |
| 696 | goto free_buffers; |
| 697 | } |
| 698 | } |
| 699 | |
| 700 | for (i = 0; i < SN9C102_URBS; i++) { |
| 701 | urb = usb_alloc_urb(SN9C102_ISO_PACKETS, GFP_KERNEL); |
| 702 | cam->urb[i] = urb; |
| 703 | if (!urb) { |
| 704 | err = -ENOMEM; |
| 705 | DBG(1, "usb_alloc_urb() failed") |
| 706 | goto free_urbs; |
| 707 | } |
| 708 | urb->dev = udev; |
| 709 | urb->context = cam; |
| 710 | urb->pipe = usb_rcvisocpipe(udev, 1); |
| 711 | urb->transfer_flags = URB_ISO_ASAP; |
| 712 | urb->number_of_packets = SN9C102_ISO_PACKETS; |
| 713 | urb->complete = sn9c102_urb_complete; |
| 714 | urb->transfer_buffer = cam->transfer_buffer[i]; |
| 715 | urb->transfer_buffer_length = psz * SN9C102_ISO_PACKETS; |
| 716 | urb->interval = 1; |
| 717 | for (j = 0; j < SN9C102_ISO_PACKETS; j++) { |
| 718 | urb->iso_frame_desc[j].offset = psz * j; |
| 719 | urb->iso_frame_desc[j].length = psz; |
| 720 | } |
| 721 | } |
| 722 | |
| 723 | /* Enable video */ |
| 724 | if (!(cam->reg[0x01] & 0x04)) { |
| 725 | err = sn9c102_write_reg(cam, cam->reg[0x01] | 0x04, 0x01); |
| 726 | if (err) { |
| 727 | err = -EIO; |
| 728 | DBG(1, "I/O hardware error") |
| 729 | goto free_urbs; |
| 730 | } |
| 731 | } |
| 732 | |
| 733 | err = usb_set_interface(udev, 0, SN9C102_ALTERNATE_SETTING); |
| 734 | if (err) { |
| 735 | DBG(1, "usb_set_interface() failed") |
| 736 | goto free_urbs; |
| 737 | } |
| 738 | |
| 739 | cam->frame_current = NULL; |
| 740 | |
| 741 | for (i = 0; i < SN9C102_URBS; i++) { |
| 742 | err = usb_submit_urb(cam->urb[i], GFP_KERNEL); |
| 743 | if (err) { |
| 744 | for (j = i-1; j >= 0; j--) |
| 745 | usb_kill_urb(cam->urb[j]); |
| 746 | DBG(1, "usb_submit_urb() failed, error %d", err) |
| 747 | goto free_urbs; |
| 748 | } |
| 749 | } |
| 750 | |
| 751 | return 0; |
| 752 | |
| 753 | free_urbs: |
| 754 | for (i = 0; (i < SN9C102_URBS) && cam->urb[i]; i++) |
| 755 | usb_free_urb(cam->urb[i]); |
| 756 | |
| 757 | free_buffers: |
| 758 | for (i = 0; (i < SN9C102_URBS) && cam->transfer_buffer[i]; i++) |
| 759 | kfree(cam->transfer_buffer[i]); |
| 760 | |
| 761 | return err; |
| 762 | } |
| 763 | |
| 764 | |
| 765 | static int sn9c102_stop_transfer(struct sn9c102_device* cam) |
| 766 | { |
| 767 | struct usb_device *udev = cam->usbdev; |
| 768 | s8 i; |
| 769 | int err = 0; |
| 770 | |
| 771 | if (cam->state & DEV_DISCONNECTED) |
| 772 | return 0; |
| 773 | |
| 774 | for (i = SN9C102_URBS-1; i >= 0; i--) { |
| 775 | usb_kill_urb(cam->urb[i]); |
| 776 | usb_free_urb(cam->urb[i]); |
| 777 | kfree(cam->transfer_buffer[i]); |
| 778 | } |
| 779 | |
| 780 | err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */ |
| 781 | if (err) |
| 782 | DBG(3, "usb_set_interface() failed") |
| 783 | |
| 784 | return err; |
| 785 | } |
| 786 | |
| 787 | |
Adrian Bunk | 7107627 | 2005-04-22 15:07:00 -0700 | [diff] [blame] | 788 | static int sn9c102_stream_interrupt(struct sn9c102_device* cam) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | { |
| 790 | int err = 0; |
| 791 | |
| 792 | cam->stream = STREAM_INTERRUPT; |
| 793 | err = wait_event_timeout(cam->wait_stream, |
| 794 | (cam->stream == STREAM_OFF) || |
| 795 | (cam->state & DEV_DISCONNECTED), |
| 796 | SN9C102_URB_TIMEOUT); |
| 797 | if (cam->state & DEV_DISCONNECTED) |
| 798 | return -ENODEV; |
| 799 | else if (err) { |
| 800 | cam->state |= DEV_MISCONFIGURED; |
| 801 | DBG(1, "The camera is misconfigured. To use it, close and " |
| 802 | "open /dev/video%d again.", cam->v4ldev->minor) |
| 803 | return err; |
| 804 | } |
| 805 | |
| 806 | return 0; |
| 807 | } |
| 808 | |
| 809 | /*****************************************************************************/ |
| 810 | |
| 811 | static u8 sn9c102_strtou8(const char* buff, size_t len, ssize_t* count) |
| 812 | { |
| 813 | char str[5]; |
| 814 | char* endp; |
| 815 | unsigned long val; |
| 816 | |
| 817 | if (len < 4) { |
| 818 | strncpy(str, buff, len); |
| 819 | str[len+1] = '\0'; |
| 820 | } else { |
| 821 | strncpy(str, buff, 4); |
| 822 | str[4] = '\0'; |
| 823 | } |
| 824 | |
| 825 | val = simple_strtoul(str, &endp, 0); |
| 826 | |
| 827 | *count = 0; |
| 828 | if (val <= 0xff) |
| 829 | *count = (ssize_t)(endp - str); |
| 830 | if ((*count) && (len == *count+1) && (buff[*count] == '\n')) |
| 831 | *count += 1; |
| 832 | |
| 833 | return (u8)val; |
| 834 | } |
| 835 | |
| 836 | /* |
| 837 | NOTE 1: being inside one of the following methods implies that the v4l |
| 838 | device exists for sure (see kobjects and reference counters) |
| 839 | NOTE 2: buffers are PAGE_SIZE long |
| 840 | */ |
| 841 | |
| 842 | static ssize_t sn9c102_show_reg(struct class_device* cd, char* buf) |
| 843 | { |
| 844 | struct sn9c102_device* cam; |
| 845 | ssize_t count; |
| 846 | |
| 847 | if (down_interruptible(&sn9c102_sysfs_lock)) |
| 848 | return -ERESTARTSYS; |
| 849 | |
| 850 | cam = video_get_drvdata(to_video_device(cd)); |
| 851 | if (!cam) { |
| 852 | up(&sn9c102_sysfs_lock); |
| 853 | return -ENODEV; |
| 854 | } |
| 855 | |
| 856 | count = sprintf(buf, "%u\n", cam->sysfs.reg); |
| 857 | |
| 858 | up(&sn9c102_sysfs_lock); |
| 859 | |
| 860 | return count; |
| 861 | } |
| 862 | |
| 863 | |
| 864 | static ssize_t |
| 865 | sn9c102_store_reg(struct class_device* cd, const char* buf, size_t len) |
| 866 | { |
| 867 | struct sn9c102_device* cam; |
| 868 | u8 index; |
| 869 | ssize_t count; |
| 870 | |
| 871 | if (down_interruptible(&sn9c102_sysfs_lock)) |
| 872 | return -ERESTARTSYS; |
| 873 | |
| 874 | cam = video_get_drvdata(to_video_device(cd)); |
| 875 | if (!cam) { |
| 876 | up(&sn9c102_sysfs_lock); |
| 877 | return -ENODEV; |
| 878 | } |
| 879 | |
| 880 | index = sn9c102_strtou8(buf, len, &count); |
| 881 | if (index > 0x1f || !count) { |
| 882 | up(&sn9c102_sysfs_lock); |
| 883 | return -EINVAL; |
| 884 | } |
| 885 | |
| 886 | cam->sysfs.reg = index; |
| 887 | |
| 888 | DBG(2, "Moved SN9C10X register index to 0x%02X", cam->sysfs.reg) |
| 889 | DBG(3, "Written bytes: %zd", count) |
| 890 | |
| 891 | up(&sn9c102_sysfs_lock); |
| 892 | |
| 893 | return count; |
| 894 | } |
| 895 | |
| 896 | |
| 897 | static ssize_t sn9c102_show_val(struct class_device* cd, char* buf) |
| 898 | { |
| 899 | struct sn9c102_device* cam; |
| 900 | ssize_t count; |
| 901 | int val; |
| 902 | |
| 903 | if (down_interruptible(&sn9c102_sysfs_lock)) |
| 904 | return -ERESTARTSYS; |
| 905 | |
| 906 | cam = video_get_drvdata(to_video_device(cd)); |
| 907 | if (!cam) { |
| 908 | up(&sn9c102_sysfs_lock); |
| 909 | return -ENODEV; |
| 910 | } |
| 911 | |
| 912 | if ((val = sn9c102_read_reg(cam, cam->sysfs.reg)) < 0) { |
| 913 | up(&sn9c102_sysfs_lock); |
| 914 | return -EIO; |
| 915 | } |
| 916 | |
| 917 | count = sprintf(buf, "%d\n", val); |
| 918 | |
| 919 | DBG(3, "Read bytes: %zd", count) |
| 920 | |
| 921 | up(&sn9c102_sysfs_lock); |
| 922 | |
| 923 | return count; |
| 924 | } |
| 925 | |
| 926 | |
| 927 | static ssize_t |
| 928 | sn9c102_store_val(struct class_device* cd, const char* buf, size_t len) |
| 929 | { |
| 930 | struct sn9c102_device* cam; |
| 931 | u8 value; |
| 932 | ssize_t count; |
| 933 | int err; |
| 934 | |
| 935 | if (down_interruptible(&sn9c102_sysfs_lock)) |
| 936 | return -ERESTARTSYS; |
| 937 | |
| 938 | cam = video_get_drvdata(to_video_device(cd)); |
| 939 | if (!cam) { |
| 940 | up(&sn9c102_sysfs_lock); |
| 941 | return -ENODEV; |
| 942 | } |
| 943 | |
| 944 | value = sn9c102_strtou8(buf, len, &count); |
| 945 | if (!count) { |
| 946 | up(&sn9c102_sysfs_lock); |
| 947 | return -EINVAL; |
| 948 | } |
| 949 | |
| 950 | err = sn9c102_write_reg(cam, value, cam->sysfs.reg); |
| 951 | if (err) { |
| 952 | up(&sn9c102_sysfs_lock); |
| 953 | return -EIO; |
| 954 | } |
| 955 | |
| 956 | DBG(2, "Written SN9C10X reg. 0x%02X, val. 0x%02X", |
| 957 | cam->sysfs.reg, value) |
| 958 | DBG(3, "Written bytes: %zd", count) |
| 959 | |
| 960 | up(&sn9c102_sysfs_lock); |
| 961 | |
| 962 | return count; |
| 963 | } |
| 964 | |
| 965 | |
| 966 | static ssize_t sn9c102_show_i2c_reg(struct class_device* cd, char* buf) |
| 967 | { |
| 968 | struct sn9c102_device* cam; |
| 969 | ssize_t count; |
| 970 | |
| 971 | if (down_interruptible(&sn9c102_sysfs_lock)) |
| 972 | return -ERESTARTSYS; |
| 973 | |
| 974 | cam = video_get_drvdata(to_video_device(cd)); |
| 975 | if (!cam) { |
| 976 | up(&sn9c102_sysfs_lock); |
| 977 | return -ENODEV; |
| 978 | } |
| 979 | |
| 980 | count = sprintf(buf, "%u\n", cam->sysfs.i2c_reg); |
| 981 | |
| 982 | DBG(3, "Read bytes: %zd", count) |
| 983 | |
| 984 | up(&sn9c102_sysfs_lock); |
| 985 | |
| 986 | return count; |
| 987 | } |
| 988 | |
| 989 | |
| 990 | static ssize_t |
| 991 | sn9c102_store_i2c_reg(struct class_device* cd, const char* buf, size_t len) |
| 992 | { |
| 993 | struct sn9c102_device* cam; |
| 994 | u8 index; |
| 995 | ssize_t count; |
| 996 | |
| 997 | if (down_interruptible(&sn9c102_sysfs_lock)) |
| 998 | return -ERESTARTSYS; |
| 999 | |
| 1000 | cam = video_get_drvdata(to_video_device(cd)); |
| 1001 | if (!cam) { |
| 1002 | up(&sn9c102_sysfs_lock); |
| 1003 | return -ENODEV; |
| 1004 | } |
| 1005 | |
| 1006 | index = sn9c102_strtou8(buf, len, &count); |
| 1007 | if (!count) { |
| 1008 | up(&sn9c102_sysfs_lock); |
| 1009 | return -EINVAL; |
| 1010 | } |
| 1011 | |
| 1012 | cam->sysfs.i2c_reg = index; |
| 1013 | |
| 1014 | DBG(2, "Moved sensor register index to 0x%02X", cam->sysfs.i2c_reg) |
| 1015 | DBG(3, "Written bytes: %zd", count) |
| 1016 | |
| 1017 | up(&sn9c102_sysfs_lock); |
| 1018 | |
| 1019 | return count; |
| 1020 | } |
| 1021 | |
| 1022 | |
| 1023 | static ssize_t sn9c102_show_i2c_val(struct class_device* cd, char* buf) |
| 1024 | { |
| 1025 | struct sn9c102_device* cam; |
| 1026 | ssize_t count; |
| 1027 | int val; |
| 1028 | |
| 1029 | if (down_interruptible(&sn9c102_sysfs_lock)) |
| 1030 | return -ERESTARTSYS; |
| 1031 | |
| 1032 | cam = video_get_drvdata(to_video_device(cd)); |
| 1033 | if (!cam) { |
| 1034 | up(&sn9c102_sysfs_lock); |
| 1035 | return -ENODEV; |
| 1036 | } |
| 1037 | |
| 1038 | if (!(cam->sensor->sysfs_ops & SN9C102_I2C_READ)) { |
| 1039 | up(&sn9c102_sysfs_lock); |
| 1040 | return -ENOSYS; |
| 1041 | } |
| 1042 | |
| 1043 | if ((val = sn9c102_i2c_read(cam, cam->sysfs.i2c_reg)) < 0) { |
| 1044 | up(&sn9c102_sysfs_lock); |
| 1045 | return -EIO; |
| 1046 | } |
| 1047 | |
| 1048 | count = sprintf(buf, "%d\n", val); |
| 1049 | |
| 1050 | DBG(3, "Read bytes: %zd", count) |
| 1051 | |
| 1052 | up(&sn9c102_sysfs_lock); |
| 1053 | |
| 1054 | return count; |
| 1055 | } |
| 1056 | |
| 1057 | |
| 1058 | static ssize_t |
| 1059 | sn9c102_store_i2c_val(struct class_device* cd, const char* buf, size_t len) |
| 1060 | { |
| 1061 | struct sn9c102_device* cam; |
| 1062 | u8 value; |
| 1063 | ssize_t count; |
| 1064 | int err; |
| 1065 | |
| 1066 | if (down_interruptible(&sn9c102_sysfs_lock)) |
| 1067 | return -ERESTARTSYS; |
| 1068 | |
| 1069 | cam = video_get_drvdata(to_video_device(cd)); |
| 1070 | if (!cam) { |
| 1071 | up(&sn9c102_sysfs_lock); |
| 1072 | return -ENODEV; |
| 1073 | } |
| 1074 | |
| 1075 | if (!(cam->sensor->sysfs_ops & SN9C102_I2C_WRITE)) { |
| 1076 | up(&sn9c102_sysfs_lock); |
| 1077 | return -ENOSYS; |
| 1078 | } |
| 1079 | |
| 1080 | value = sn9c102_strtou8(buf, len, &count); |
| 1081 | if (!count) { |
| 1082 | up(&sn9c102_sysfs_lock); |
| 1083 | return -EINVAL; |
| 1084 | } |
| 1085 | |
| 1086 | err = sn9c102_i2c_write(cam, cam->sysfs.i2c_reg, value); |
| 1087 | if (err) { |
| 1088 | up(&sn9c102_sysfs_lock); |
| 1089 | return -EIO; |
| 1090 | } |
| 1091 | |
| 1092 | DBG(2, "Written sensor reg. 0x%02X, val. 0x%02X", |
| 1093 | cam->sysfs.i2c_reg, value) |
| 1094 | DBG(3, "Written bytes: %zd", count) |
| 1095 | |
| 1096 | up(&sn9c102_sysfs_lock); |
| 1097 | |
| 1098 | return count; |
| 1099 | } |
| 1100 | |
| 1101 | |
| 1102 | static ssize_t |
| 1103 | sn9c102_store_green(struct class_device* cd, const char* buf, size_t len) |
| 1104 | { |
| 1105 | struct sn9c102_device* cam; |
| 1106 | enum sn9c102_bridge bridge; |
| 1107 | ssize_t res = 0; |
| 1108 | u8 value; |
| 1109 | ssize_t count; |
| 1110 | |
| 1111 | if (down_interruptible(&sn9c102_sysfs_lock)) |
| 1112 | return -ERESTARTSYS; |
| 1113 | |
| 1114 | cam = video_get_drvdata(to_video_device(cd)); |
| 1115 | if (!cam) { |
| 1116 | up(&sn9c102_sysfs_lock); |
| 1117 | return -ENODEV; |
| 1118 | } |
| 1119 | |
| 1120 | bridge = cam->bridge; |
| 1121 | |
| 1122 | up(&sn9c102_sysfs_lock); |
| 1123 | |
| 1124 | value = sn9c102_strtou8(buf, len, &count); |
| 1125 | if (!count) |
| 1126 | return -EINVAL; |
| 1127 | |
| 1128 | switch (bridge) { |
| 1129 | case BRIDGE_SN9C101: |
| 1130 | case BRIDGE_SN9C102: |
| 1131 | if (value > 0x0f) |
| 1132 | return -EINVAL; |
| 1133 | if ((res = sn9c102_store_reg(cd, "0x11", 4)) >= 0) |
| 1134 | res = sn9c102_store_val(cd, buf, len); |
| 1135 | break; |
| 1136 | case BRIDGE_SN9C103: |
| 1137 | if (value > 0x7f) |
| 1138 | return -EINVAL; |
| 1139 | if ((res = sn9c102_store_reg(cd, "0x04", 4)) >= 0) |
| 1140 | res = sn9c102_store_val(cd, buf, len); |
| 1141 | break; |
| 1142 | } |
| 1143 | |
| 1144 | return res; |
| 1145 | } |
| 1146 | |
| 1147 | |
| 1148 | static ssize_t |
| 1149 | sn9c102_store_blue(struct class_device* cd, const char* buf, size_t len) |
| 1150 | { |
| 1151 | ssize_t res = 0; |
| 1152 | u8 value; |
| 1153 | ssize_t count; |
| 1154 | |
| 1155 | value = sn9c102_strtou8(buf, len, &count); |
| 1156 | if (!count || value > 0x7f) |
| 1157 | return -EINVAL; |
| 1158 | |
| 1159 | if ((res = sn9c102_store_reg(cd, "0x06", 4)) >= 0) |
| 1160 | res = sn9c102_store_val(cd, buf, len); |
| 1161 | |
| 1162 | return res; |
| 1163 | } |
| 1164 | |
| 1165 | |
| 1166 | static ssize_t |
| 1167 | sn9c102_store_red(struct class_device* cd, const char* buf, size_t len) |
| 1168 | { |
| 1169 | ssize_t res = 0; |
| 1170 | u8 value; |
| 1171 | ssize_t count; |
| 1172 | |
| 1173 | value = sn9c102_strtou8(buf, len, &count); |
| 1174 | if (!count || value > 0x7f) |
| 1175 | return -EINVAL; |
| 1176 | |
| 1177 | if ((res = sn9c102_store_reg(cd, "0x05", 4)) >= 0) |
| 1178 | res = sn9c102_store_val(cd, buf, len); |
| 1179 | |
| 1180 | return res; |
| 1181 | } |
| 1182 | |
| 1183 | |
| 1184 | static ssize_t sn9c102_show_frame_header(struct class_device* cd, char* buf) |
| 1185 | { |
| 1186 | struct sn9c102_device* cam; |
| 1187 | ssize_t count; |
| 1188 | |
| 1189 | cam = video_get_drvdata(to_video_device(cd)); |
| 1190 | if (!cam) |
| 1191 | return -ENODEV; |
| 1192 | |
| 1193 | count = sizeof(cam->sysfs.frame_header); |
| 1194 | memcpy(buf, cam->sysfs.frame_header, count); |
| 1195 | |
| 1196 | DBG(3, "Frame header, read bytes: %zd", count) |
| 1197 | |
| 1198 | return count; |
| 1199 | } |
| 1200 | |
| 1201 | |
| 1202 | static CLASS_DEVICE_ATTR(reg, S_IRUGO | S_IWUSR, |
| 1203 | sn9c102_show_reg, sn9c102_store_reg); |
| 1204 | static CLASS_DEVICE_ATTR(val, S_IRUGO | S_IWUSR, |
| 1205 | sn9c102_show_val, sn9c102_store_val); |
| 1206 | static CLASS_DEVICE_ATTR(i2c_reg, S_IRUGO | S_IWUSR, |
| 1207 | sn9c102_show_i2c_reg, sn9c102_store_i2c_reg); |
| 1208 | static CLASS_DEVICE_ATTR(i2c_val, S_IRUGO | S_IWUSR, |
| 1209 | sn9c102_show_i2c_val, sn9c102_store_i2c_val); |
| 1210 | static CLASS_DEVICE_ATTR(green, S_IWUGO, NULL, sn9c102_store_green); |
| 1211 | static CLASS_DEVICE_ATTR(blue, S_IWUGO, NULL, sn9c102_store_blue); |
| 1212 | static CLASS_DEVICE_ATTR(red, S_IWUGO, NULL, sn9c102_store_red); |
| 1213 | static CLASS_DEVICE_ATTR(frame_header, S_IRUGO, |
| 1214 | sn9c102_show_frame_header, NULL); |
| 1215 | |
| 1216 | |
| 1217 | static void sn9c102_create_sysfs(struct sn9c102_device* cam) |
| 1218 | { |
| 1219 | struct video_device *v4ldev = cam->v4ldev; |
| 1220 | |
| 1221 | video_device_create_file(v4ldev, &class_device_attr_reg); |
| 1222 | video_device_create_file(v4ldev, &class_device_attr_val); |
| 1223 | video_device_create_file(v4ldev, &class_device_attr_frame_header); |
| 1224 | if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102) |
| 1225 | video_device_create_file(v4ldev, &class_device_attr_green); |
| 1226 | else if (cam->bridge == BRIDGE_SN9C103) { |
| 1227 | video_device_create_file(v4ldev, &class_device_attr_blue); |
| 1228 | video_device_create_file(v4ldev, &class_device_attr_red); |
| 1229 | } |
| 1230 | if (cam->sensor->sysfs_ops) { |
| 1231 | video_device_create_file(v4ldev, &class_device_attr_i2c_reg); |
| 1232 | video_device_create_file(v4ldev, &class_device_attr_i2c_val); |
| 1233 | } |
| 1234 | } |
| 1235 | |
| 1236 | /*****************************************************************************/ |
| 1237 | |
| 1238 | static int |
| 1239 | sn9c102_set_pix_format(struct sn9c102_device* cam, struct v4l2_pix_format* pix) |
| 1240 | { |
| 1241 | int err = 0; |
| 1242 | |
| 1243 | if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X) |
| 1244 | err += sn9c102_write_reg(cam, cam->reg[0x18] | 0x80, 0x18); |
| 1245 | else |
| 1246 | err += sn9c102_write_reg(cam, cam->reg[0x18] & 0x7f, 0x18); |
| 1247 | |
| 1248 | return err ? -EIO : 0; |
| 1249 | } |
| 1250 | |
| 1251 | |
| 1252 | static int |
| 1253 | sn9c102_set_compression(struct sn9c102_device* cam, |
| 1254 | struct v4l2_jpegcompression* compression) |
| 1255 | { |
| 1256 | int err = 0; |
| 1257 | |
| 1258 | if (compression->quality == 0) |
| 1259 | err += sn9c102_write_reg(cam, cam->reg[0x17] | 0x01, 0x17); |
| 1260 | else if (compression->quality == 1) |
| 1261 | err += sn9c102_write_reg(cam, cam->reg[0x17] & 0xfe, 0x17); |
| 1262 | |
| 1263 | return err ? -EIO : 0; |
| 1264 | } |
| 1265 | |
| 1266 | |
| 1267 | static int sn9c102_set_scale(struct sn9c102_device* cam, u8 scale) |
| 1268 | { |
| 1269 | u8 r = 0; |
| 1270 | int err = 0; |
| 1271 | |
| 1272 | if (scale == 1) |
| 1273 | r = cam->reg[0x18] & 0xcf; |
| 1274 | else if (scale == 2) { |
| 1275 | r = cam->reg[0x18] & 0xcf; |
| 1276 | r |= 0x10; |
| 1277 | } else if (scale == 4) |
| 1278 | r = cam->reg[0x18] | 0x20; |
| 1279 | |
| 1280 | err += sn9c102_write_reg(cam, r, 0x18); |
| 1281 | if (err) |
| 1282 | return -EIO; |
| 1283 | |
| 1284 | PDBGG("Scaling factor: %u", scale) |
| 1285 | |
| 1286 | return 0; |
| 1287 | } |
| 1288 | |
| 1289 | |
| 1290 | static int sn9c102_set_crop(struct sn9c102_device* cam, struct v4l2_rect* rect) |
| 1291 | { |
| 1292 | struct sn9c102_sensor* s = cam->sensor; |
| 1293 | u8 h_start = (u8)(rect->left - s->cropcap.bounds.left), |
| 1294 | v_start = (u8)(rect->top - s->cropcap.bounds.top), |
| 1295 | h_size = (u8)(rect->width / 16), |
| 1296 | v_size = (u8)(rect->height / 16); |
| 1297 | int err = 0; |
| 1298 | |
| 1299 | err += sn9c102_write_reg(cam, h_start, 0x12); |
| 1300 | err += sn9c102_write_reg(cam, v_start, 0x13); |
| 1301 | err += sn9c102_write_reg(cam, h_size, 0x15); |
| 1302 | err += sn9c102_write_reg(cam, v_size, 0x16); |
| 1303 | if (err) |
| 1304 | return -EIO; |
| 1305 | |
| 1306 | PDBGG("h_start, v_start, h_size, v_size, ho_size, vo_size " |
| 1307 | "%u %u %u %u", h_start, v_start, h_size, v_size) |
| 1308 | |
| 1309 | return 0; |
| 1310 | } |
| 1311 | |
| 1312 | |
| 1313 | static int sn9c102_init(struct sn9c102_device* cam) |
| 1314 | { |
| 1315 | struct sn9c102_sensor* s = cam->sensor; |
| 1316 | struct v4l2_control ctrl; |
| 1317 | struct v4l2_queryctrl *qctrl; |
| 1318 | struct v4l2_rect* rect; |
| 1319 | u8 i = 0, n = 0; |
| 1320 | int err = 0; |
| 1321 | |
| 1322 | if (!(cam->state & DEV_INITIALIZED)) { |
| 1323 | init_waitqueue_head(&cam->open); |
| 1324 | qctrl = s->qctrl; |
| 1325 | rect = &(s->cropcap.defrect); |
| 1326 | } else { /* use current values */ |
| 1327 | qctrl = s->_qctrl; |
| 1328 | rect = &(s->_rect); |
| 1329 | } |
| 1330 | |
| 1331 | err += sn9c102_set_scale(cam, rect->width / s->pix_format.width); |
| 1332 | err += sn9c102_set_crop(cam, rect); |
| 1333 | if (err) |
| 1334 | return err; |
| 1335 | |
| 1336 | if (s->init) { |
| 1337 | err = s->init(cam); |
| 1338 | if (err) { |
| 1339 | DBG(3, "Sensor initialization failed") |
| 1340 | return err; |
| 1341 | } |
| 1342 | } |
| 1343 | |
| 1344 | if (!(cam->state & DEV_INITIALIZED)) |
| 1345 | cam->compression.quality = cam->reg[0x17] & 0x01 ? 0 : 1; |
| 1346 | else |
| 1347 | err += sn9c102_set_compression(cam, &cam->compression); |
| 1348 | err += sn9c102_set_pix_format(cam, &s->pix_format); |
| 1349 | if (s->set_pix_format) |
| 1350 | err += s->set_pix_format(cam, &s->pix_format); |
| 1351 | if (err) |
| 1352 | return err; |
| 1353 | |
| 1354 | if (s->pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X) |
| 1355 | DBG(3, "Compressed video format is active, quality %d", |
| 1356 | cam->compression.quality) |
| 1357 | else |
| 1358 | DBG(3, "Uncompressed video format is active") |
| 1359 | |
| 1360 | if (s->set_crop) |
| 1361 | if ((err = s->set_crop(cam, rect))) { |
| 1362 | DBG(3, "set_crop() failed") |
| 1363 | return err; |
| 1364 | } |
| 1365 | |
| 1366 | if (s->set_ctrl) { |
| 1367 | n = sizeof(s->qctrl) / sizeof(s->qctrl[0]); |
| 1368 | for (i = 0; i < n; i++) |
| 1369 | if (s->qctrl[i].id != 0 && |
| 1370 | !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) { |
| 1371 | ctrl.id = s->qctrl[i].id; |
| 1372 | ctrl.value = qctrl[i].default_value; |
| 1373 | err = s->set_ctrl(cam, &ctrl); |
| 1374 | if (err) { |
| 1375 | DBG(3, "Set %s control failed", |
| 1376 | s->qctrl[i].name) |
| 1377 | return err; |
| 1378 | } |
| 1379 | DBG(3, "Image sensor supports '%s' control", |
| 1380 | s->qctrl[i].name) |
| 1381 | } |
| 1382 | } |
| 1383 | |
| 1384 | if (!(cam->state & DEV_INITIALIZED)) { |
| 1385 | init_MUTEX(&cam->fileop_sem); |
| 1386 | spin_lock_init(&cam->queue_lock); |
| 1387 | init_waitqueue_head(&cam->wait_frame); |
| 1388 | init_waitqueue_head(&cam->wait_stream); |
| 1389 | cam->nreadbuffers = 2; |
| 1390 | memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl)); |
| 1391 | memcpy(&(s->_rect), &(s->cropcap.defrect), |
| 1392 | sizeof(struct v4l2_rect)); |
| 1393 | cam->state |= DEV_INITIALIZED; |
| 1394 | } |
| 1395 | |
| 1396 | DBG(2, "Initialization succeeded") |
| 1397 | return 0; |
| 1398 | } |
| 1399 | |
| 1400 | |
| 1401 | static void sn9c102_release_resources(struct sn9c102_device* cam) |
| 1402 | { |
| 1403 | down(&sn9c102_sysfs_lock); |
| 1404 | |
| 1405 | DBG(2, "V4L2 device /dev/video%d deregistered", cam->v4ldev->minor) |
| 1406 | video_set_drvdata(cam->v4ldev, NULL); |
| 1407 | video_unregister_device(cam->v4ldev); |
| 1408 | |
| 1409 | up(&sn9c102_sysfs_lock); |
| 1410 | |
| 1411 | kfree(cam->control_buffer); |
| 1412 | } |
| 1413 | |
| 1414 | /*****************************************************************************/ |
| 1415 | |
| 1416 | static int sn9c102_open(struct inode* inode, struct file* filp) |
| 1417 | { |
| 1418 | struct sn9c102_device* cam; |
| 1419 | int err = 0; |
| 1420 | |
| 1421 | /* |
| 1422 | This is the only safe way to prevent race conditions with |
| 1423 | disconnect |
| 1424 | */ |
| 1425 | if (!down_read_trylock(&sn9c102_disconnect)) |
| 1426 | return -ERESTARTSYS; |
| 1427 | |
| 1428 | cam = video_get_drvdata(video_devdata(filp)); |
| 1429 | |
| 1430 | if (down_interruptible(&cam->dev_sem)) { |
| 1431 | up_read(&sn9c102_disconnect); |
| 1432 | return -ERESTARTSYS; |
| 1433 | } |
| 1434 | |
| 1435 | if (cam->users) { |
| 1436 | DBG(2, "Device /dev/video%d is busy...", cam->v4ldev->minor) |
| 1437 | if ((filp->f_flags & O_NONBLOCK) || |
| 1438 | (filp->f_flags & O_NDELAY)) { |
| 1439 | err = -EWOULDBLOCK; |
| 1440 | goto out; |
| 1441 | } |
| 1442 | up(&cam->dev_sem); |
| 1443 | err = wait_event_interruptible_exclusive(cam->open, |
| 1444 | cam->state & DEV_DISCONNECTED |
| 1445 | || !cam->users); |
| 1446 | if (err) { |
| 1447 | up_read(&sn9c102_disconnect); |
| 1448 | return err; |
| 1449 | } |
| 1450 | if (cam->state & DEV_DISCONNECTED) { |
| 1451 | up_read(&sn9c102_disconnect); |
| 1452 | return -ENODEV; |
| 1453 | } |
| 1454 | down(&cam->dev_sem); |
| 1455 | } |
| 1456 | |
| 1457 | |
| 1458 | if (cam->state & DEV_MISCONFIGURED) { |
| 1459 | err = sn9c102_init(cam); |
| 1460 | if (err) { |
| 1461 | DBG(1, "Initialization failed again. " |
| 1462 | "I will retry on next open().") |
| 1463 | goto out; |
| 1464 | } |
| 1465 | cam->state &= ~DEV_MISCONFIGURED; |
| 1466 | } |
| 1467 | |
| 1468 | if ((err = sn9c102_start_transfer(cam))) |
| 1469 | goto out; |
| 1470 | |
| 1471 | filp->private_data = cam; |
| 1472 | cam->users++; |
| 1473 | cam->io = IO_NONE; |
| 1474 | cam->stream = STREAM_OFF; |
| 1475 | cam->nbuffers = 0; |
| 1476 | cam->frame_count = 0; |
| 1477 | sn9c102_empty_framequeues(cam); |
| 1478 | |
| 1479 | DBG(3, "Video device /dev/video%d is open", cam->v4ldev->minor) |
| 1480 | |
| 1481 | out: |
| 1482 | up(&cam->dev_sem); |
| 1483 | up_read(&sn9c102_disconnect); |
| 1484 | return err; |
| 1485 | } |
| 1486 | |
| 1487 | |
| 1488 | static int sn9c102_release(struct inode* inode, struct file* filp) |
| 1489 | { |
| 1490 | struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp)); |
| 1491 | |
| 1492 | down(&cam->dev_sem); /* prevent disconnect() to be called */ |
| 1493 | |
| 1494 | sn9c102_stop_transfer(cam); |
| 1495 | |
| 1496 | sn9c102_release_buffers(cam); |
| 1497 | |
| 1498 | if (cam->state & DEV_DISCONNECTED) { |
| 1499 | sn9c102_release_resources(cam); |
| 1500 | up(&cam->dev_sem); |
| 1501 | kfree(cam); |
| 1502 | return 0; |
| 1503 | } |
| 1504 | |
| 1505 | cam->users--; |
| 1506 | wake_up_interruptible_nr(&cam->open, 1); |
| 1507 | |
| 1508 | DBG(3, "Video device /dev/video%d closed", cam->v4ldev->minor) |
| 1509 | |
| 1510 | up(&cam->dev_sem); |
| 1511 | |
| 1512 | return 0; |
| 1513 | } |
| 1514 | |
| 1515 | |
| 1516 | static ssize_t |
| 1517 | sn9c102_read(struct file* filp, char __user * buf, size_t count, loff_t* f_pos) |
| 1518 | { |
| 1519 | struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp)); |
| 1520 | struct sn9c102_frame_t* f, * i; |
| 1521 | unsigned long lock_flags; |
| 1522 | int err = 0; |
| 1523 | |
| 1524 | if (down_interruptible(&cam->fileop_sem)) |
| 1525 | return -ERESTARTSYS; |
| 1526 | |
| 1527 | if (cam->state & DEV_DISCONNECTED) { |
| 1528 | DBG(1, "Device not present") |
| 1529 | up(&cam->fileop_sem); |
| 1530 | return -ENODEV; |
| 1531 | } |
| 1532 | |
| 1533 | if (cam->state & DEV_MISCONFIGURED) { |
| 1534 | DBG(1, "The camera is misconfigured. Close and open it again.") |
| 1535 | up(&cam->fileop_sem); |
| 1536 | return -EIO; |
| 1537 | } |
| 1538 | |
| 1539 | if (cam->io == IO_MMAP) { |
| 1540 | DBG(3, "Close and open the device again to choose " |
| 1541 | "the read method") |
| 1542 | up(&cam->fileop_sem); |
| 1543 | return -EINVAL; |
| 1544 | } |
| 1545 | |
| 1546 | if (cam->io == IO_NONE) { |
| 1547 | if (!sn9c102_request_buffers(cam,cam->nreadbuffers, IO_READ)) { |
| 1548 | DBG(1, "read() failed, not enough memory") |
| 1549 | up(&cam->fileop_sem); |
| 1550 | return -ENOMEM; |
| 1551 | } |
| 1552 | cam->io = IO_READ; |
| 1553 | cam->stream = STREAM_ON; |
| 1554 | sn9c102_queue_unusedframes(cam); |
| 1555 | } |
| 1556 | |
| 1557 | if (!count) { |
| 1558 | up(&cam->fileop_sem); |
| 1559 | return 0; |
| 1560 | } |
| 1561 | |
| 1562 | if (list_empty(&cam->outqueue)) { |
| 1563 | if (filp->f_flags & O_NONBLOCK) { |
| 1564 | up(&cam->fileop_sem); |
| 1565 | return -EAGAIN; |
| 1566 | } |
| 1567 | err = wait_event_interruptible |
| 1568 | ( cam->wait_frame, |
| 1569 | (!list_empty(&cam->outqueue)) || |
| 1570 | (cam->state & DEV_DISCONNECTED) || |
| 1571 | (cam->state & DEV_MISCONFIGURED) ); |
| 1572 | if (err) { |
| 1573 | up(&cam->fileop_sem); |
| 1574 | return err; |
| 1575 | } |
| 1576 | if (cam->state & DEV_DISCONNECTED) { |
| 1577 | up(&cam->fileop_sem); |
| 1578 | return -ENODEV; |
| 1579 | } |
| 1580 | if (cam->state & DEV_MISCONFIGURED) { |
| 1581 | up(&cam->fileop_sem); |
| 1582 | return -EIO; |
| 1583 | } |
| 1584 | } |
| 1585 | |
| 1586 | f = list_entry(cam->outqueue.prev, struct sn9c102_frame_t, frame); |
| 1587 | |
| 1588 | spin_lock_irqsave(&cam->queue_lock, lock_flags); |
| 1589 | list_for_each_entry(i, &cam->outqueue, frame) |
| 1590 | i->state = F_UNUSED; |
| 1591 | INIT_LIST_HEAD(&cam->outqueue); |
| 1592 | spin_unlock_irqrestore(&cam->queue_lock, lock_flags); |
| 1593 | |
| 1594 | sn9c102_queue_unusedframes(cam); |
| 1595 | |
| 1596 | if (count > f->buf.bytesused) |
| 1597 | count = f->buf.bytesused; |
| 1598 | |
| 1599 | if (copy_to_user(buf, f->bufmem, count)) { |
| 1600 | up(&cam->fileop_sem); |
| 1601 | return -EFAULT; |
| 1602 | } |
| 1603 | *f_pos += count; |
| 1604 | |
| 1605 | PDBGG("Frame #%lu, bytes read: %zu", (unsigned long)f->buf.index,count) |
| 1606 | |
| 1607 | up(&cam->fileop_sem); |
| 1608 | |
| 1609 | return count; |
| 1610 | } |
| 1611 | |
| 1612 | |
| 1613 | static unsigned int sn9c102_poll(struct file *filp, poll_table *wait) |
| 1614 | { |
| 1615 | struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp)); |
| 1616 | unsigned int mask = 0; |
| 1617 | |
| 1618 | if (down_interruptible(&cam->fileop_sem)) |
| 1619 | return POLLERR; |
| 1620 | |
| 1621 | if (cam->state & DEV_DISCONNECTED) { |
| 1622 | DBG(1, "Device not present") |
| 1623 | goto error; |
| 1624 | } |
| 1625 | |
| 1626 | if (cam->state & DEV_MISCONFIGURED) { |
| 1627 | DBG(1, "The camera is misconfigured. Close and open it again.") |
| 1628 | goto error; |
| 1629 | } |
| 1630 | |
| 1631 | if (cam->io == IO_NONE) { |
| 1632 | if (!sn9c102_request_buffers(cam, cam->nreadbuffers, |
| 1633 | IO_READ)) { |
| 1634 | DBG(1, "poll() failed, not enough memory") |
| 1635 | goto error; |
| 1636 | } |
| 1637 | cam->io = IO_READ; |
| 1638 | cam->stream = STREAM_ON; |
| 1639 | } |
| 1640 | |
| 1641 | if (cam->io == IO_READ) |
| 1642 | sn9c102_queue_unusedframes(cam); |
| 1643 | |
| 1644 | poll_wait(filp, &cam->wait_frame, wait); |
| 1645 | |
| 1646 | if (!list_empty(&cam->outqueue)) |
| 1647 | mask |= POLLIN | POLLRDNORM; |
| 1648 | |
| 1649 | up(&cam->fileop_sem); |
| 1650 | |
| 1651 | return mask; |
| 1652 | |
| 1653 | error: |
| 1654 | up(&cam->fileop_sem); |
| 1655 | return POLLERR; |
| 1656 | } |
| 1657 | |
| 1658 | |
| 1659 | static void sn9c102_vm_open(struct vm_area_struct* vma) |
| 1660 | { |
| 1661 | struct sn9c102_frame_t* f = vma->vm_private_data; |
| 1662 | f->vma_use_count++; |
| 1663 | } |
| 1664 | |
| 1665 | |
| 1666 | static void sn9c102_vm_close(struct vm_area_struct* vma) |
| 1667 | { |
| 1668 | /* NOTE: buffers are not freed here */ |
| 1669 | struct sn9c102_frame_t* f = vma->vm_private_data; |
| 1670 | f->vma_use_count--; |
| 1671 | } |
| 1672 | |
| 1673 | |
| 1674 | static struct vm_operations_struct sn9c102_vm_ops = { |
| 1675 | .open = sn9c102_vm_open, |
| 1676 | .close = sn9c102_vm_close, |
| 1677 | }; |
| 1678 | |
| 1679 | |
| 1680 | static int sn9c102_mmap(struct file* filp, struct vm_area_struct *vma) |
| 1681 | { |
| 1682 | struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp)); |
| 1683 | unsigned long size = vma->vm_end - vma->vm_start, |
| 1684 | start = vma->vm_start, |
| 1685 | pos, |
| 1686 | page; |
| 1687 | u32 i; |
| 1688 | |
| 1689 | if (down_interruptible(&cam->fileop_sem)) |
| 1690 | return -ERESTARTSYS; |
| 1691 | |
| 1692 | if (cam->state & DEV_DISCONNECTED) { |
| 1693 | DBG(1, "Device not present") |
| 1694 | up(&cam->fileop_sem); |
| 1695 | return -ENODEV; |
| 1696 | } |
| 1697 | |
| 1698 | if (cam->state & DEV_MISCONFIGURED) { |
| 1699 | DBG(1, "The camera is misconfigured. Close and open it again.") |
| 1700 | up(&cam->fileop_sem); |
| 1701 | return -EIO; |
| 1702 | } |
| 1703 | |
| 1704 | if (cam->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) || |
| 1705 | size != PAGE_ALIGN(cam->frame[0].buf.length)) { |
| 1706 | up(&cam->fileop_sem); |
| 1707 | return -EINVAL; |
| 1708 | } |
| 1709 | |
| 1710 | for (i = 0; i < cam->nbuffers; i++) { |
| 1711 | if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff) |
| 1712 | break; |
| 1713 | } |
| 1714 | if (i == cam->nbuffers) { |
| 1715 | up(&cam->fileop_sem); |
| 1716 | return -EINVAL; |
| 1717 | } |
| 1718 | |
| 1719 | /* VM_IO is eventually going to replace PageReserved altogether */ |
| 1720 | vma->vm_flags |= VM_IO; |
| 1721 | vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ |
| 1722 | |
| 1723 | pos = (unsigned long)cam->frame[i].bufmem; |
| 1724 | while (size > 0) { /* size is page-aligned */ |
| 1725 | page = vmalloc_to_pfn((void *)pos); |
| 1726 | if (remap_pfn_range(vma, start, page, PAGE_SIZE, |
| 1727 | vma->vm_page_prot)) { |
| 1728 | up(&cam->fileop_sem); |
| 1729 | return -EAGAIN; |
| 1730 | } |
| 1731 | start += PAGE_SIZE; |
| 1732 | pos += PAGE_SIZE; |
| 1733 | size -= PAGE_SIZE; |
| 1734 | } |
| 1735 | |
| 1736 | vma->vm_ops = &sn9c102_vm_ops; |
| 1737 | vma->vm_private_data = &cam->frame[i]; |
| 1738 | |
| 1739 | sn9c102_vm_open(vma); |
| 1740 | |
| 1741 | up(&cam->fileop_sem); |
| 1742 | |
| 1743 | return 0; |
| 1744 | } |
| 1745 | |
| 1746 | |
| 1747 | static int sn9c102_ioctl_v4l2(struct inode* inode, struct file* filp, |
| 1748 | unsigned int cmd, void __user * arg) |
| 1749 | { |
| 1750 | struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp)); |
| 1751 | |
| 1752 | switch (cmd) { |
| 1753 | |
| 1754 | case VIDIOC_QUERYCAP: |
| 1755 | { |
| 1756 | struct v4l2_capability cap = { |
| 1757 | .driver = "sn9c102", |
| 1758 | .version = SN9C102_MODULE_VERSION_CODE, |
| 1759 | .capabilities = V4L2_CAP_VIDEO_CAPTURE | |
| 1760 | V4L2_CAP_READWRITE | |
| 1761 | V4L2_CAP_STREAMING, |
| 1762 | }; |
| 1763 | |
| 1764 | strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card)); |
| 1765 | if (usb_make_path(cam->usbdev, cap.bus_info, |
| 1766 | sizeof(cap.bus_info)) < 0) |
| 1767 | strlcpy(cap.bus_info, cam->dev.bus_id, |
| 1768 | sizeof(cap.bus_info)); |
| 1769 | |
| 1770 | if (copy_to_user(arg, &cap, sizeof(cap))) |
| 1771 | return -EFAULT; |
| 1772 | |
| 1773 | return 0; |
| 1774 | } |
| 1775 | |
| 1776 | case VIDIOC_ENUMINPUT: |
| 1777 | { |
| 1778 | struct v4l2_input i; |
| 1779 | |
| 1780 | if (copy_from_user(&i, arg, sizeof(i))) |
| 1781 | return -EFAULT; |
| 1782 | |
| 1783 | if (i.index) |
| 1784 | return -EINVAL; |
| 1785 | |
| 1786 | memset(&i, 0, sizeof(i)); |
| 1787 | strcpy(i.name, "USB"); |
| 1788 | |
| 1789 | if (copy_to_user(arg, &i, sizeof(i))) |
| 1790 | return -EFAULT; |
| 1791 | |
| 1792 | return 0; |
| 1793 | } |
| 1794 | |
| 1795 | case VIDIOC_G_INPUT: |
| 1796 | case VIDIOC_S_INPUT: |
| 1797 | { |
| 1798 | int index; |
| 1799 | |
| 1800 | if (copy_from_user(&index, arg, sizeof(index))) |
| 1801 | return -EFAULT; |
| 1802 | |
| 1803 | if (index != 0) |
| 1804 | return -EINVAL; |
| 1805 | |
| 1806 | return 0; |
| 1807 | } |
| 1808 | |
| 1809 | case VIDIOC_QUERYCTRL: |
| 1810 | { |
| 1811 | struct sn9c102_sensor* s = cam->sensor; |
| 1812 | struct v4l2_queryctrl qc; |
| 1813 | u8 i, n; |
| 1814 | |
| 1815 | if (copy_from_user(&qc, arg, sizeof(qc))) |
| 1816 | return -EFAULT; |
| 1817 | |
| 1818 | n = sizeof(s->qctrl) / sizeof(s->qctrl[0]); |
| 1819 | for (i = 0; i < n; i++) |
| 1820 | if (qc.id && qc.id == s->qctrl[i].id) { |
| 1821 | memcpy(&qc, &(s->qctrl[i]), sizeof(qc)); |
| 1822 | if (copy_to_user(arg, &qc, sizeof(qc))) |
| 1823 | return -EFAULT; |
| 1824 | return 0; |
| 1825 | } |
| 1826 | |
| 1827 | return -EINVAL; |
| 1828 | } |
| 1829 | |
| 1830 | case VIDIOC_G_CTRL: |
| 1831 | { |
| 1832 | struct sn9c102_sensor* s = cam->sensor; |
| 1833 | struct v4l2_control ctrl; |
| 1834 | int err = 0; |
| 1835 | |
| 1836 | if (!s->get_ctrl) |
| 1837 | return -EINVAL; |
| 1838 | |
| 1839 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
| 1840 | return -EFAULT; |
| 1841 | |
| 1842 | err = s->get_ctrl(cam, &ctrl); |
| 1843 | |
| 1844 | if (copy_to_user(arg, &ctrl, sizeof(ctrl))) |
| 1845 | return -EFAULT; |
| 1846 | |
| 1847 | return err; |
| 1848 | } |
| 1849 | |
| 1850 | case VIDIOC_S_CTRL_OLD: |
| 1851 | case VIDIOC_S_CTRL: |
| 1852 | { |
| 1853 | struct sn9c102_sensor* s = cam->sensor; |
| 1854 | struct v4l2_control ctrl; |
| 1855 | u8 i, n; |
| 1856 | int err = 0; |
| 1857 | |
| 1858 | if (!s->set_ctrl) |
| 1859 | return -EINVAL; |
| 1860 | |
| 1861 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
| 1862 | return -EFAULT; |
| 1863 | |
| 1864 | n = sizeof(s->qctrl) / sizeof(s->qctrl[0]); |
| 1865 | for (i = 0; i < n; i++) |
| 1866 | if (ctrl.id == s->qctrl[i].id) { |
| 1867 | if (ctrl.value < s->qctrl[i].minimum || |
| 1868 | ctrl.value > s->qctrl[i].maximum) |
| 1869 | return -ERANGE; |
| 1870 | ctrl.value -= ctrl.value % s->qctrl[i].step; |
| 1871 | break; |
| 1872 | } |
| 1873 | |
| 1874 | if ((err = s->set_ctrl(cam, &ctrl))) |
| 1875 | return err; |
| 1876 | |
| 1877 | s->_qctrl[i].default_value = ctrl.value; |
| 1878 | |
| 1879 | PDBGG("VIDIOC_S_CTRL: id %lu, value %lu", |
| 1880 | (unsigned long)ctrl.id, (unsigned long)ctrl.value) |
| 1881 | |
| 1882 | return 0; |
| 1883 | } |
| 1884 | |
| 1885 | case VIDIOC_CROPCAP: |
| 1886 | { |
| 1887 | struct v4l2_cropcap* cc = &(cam->sensor->cropcap); |
| 1888 | |
| 1889 | cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 1890 | cc->pixelaspect.numerator = 1; |
| 1891 | cc->pixelaspect.denominator = 1; |
| 1892 | |
| 1893 | if (copy_to_user(arg, cc, sizeof(*cc))) |
| 1894 | return -EFAULT; |
| 1895 | |
| 1896 | return 0; |
| 1897 | } |
| 1898 | |
| 1899 | case VIDIOC_G_CROP: |
| 1900 | { |
| 1901 | struct sn9c102_sensor* s = cam->sensor; |
| 1902 | struct v4l2_crop crop = { |
| 1903 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, |
| 1904 | }; |
| 1905 | |
| 1906 | memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect)); |
| 1907 | |
| 1908 | if (copy_to_user(arg, &crop, sizeof(crop))) |
| 1909 | return -EFAULT; |
| 1910 | |
| 1911 | return 0; |
| 1912 | } |
| 1913 | |
| 1914 | case VIDIOC_S_CROP: |
| 1915 | { |
| 1916 | struct sn9c102_sensor* s = cam->sensor; |
| 1917 | struct v4l2_crop crop; |
| 1918 | struct v4l2_rect* rect; |
| 1919 | struct v4l2_rect* bounds = &(s->cropcap.bounds); |
| 1920 | struct v4l2_pix_format* pix_format = &(s->pix_format); |
| 1921 | u8 scale; |
| 1922 | const enum sn9c102_stream_state stream = cam->stream; |
| 1923 | const u32 nbuffers = cam->nbuffers; |
| 1924 | u32 i; |
| 1925 | int err = 0; |
| 1926 | |
| 1927 | if (copy_from_user(&crop, arg, sizeof(crop))) |
| 1928 | return -EFAULT; |
| 1929 | |
| 1930 | rect = &(crop.c); |
| 1931 | |
| 1932 | if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 1933 | return -EINVAL; |
| 1934 | |
| 1935 | if (cam->module_param.force_munmap) |
| 1936 | for (i = 0; i < cam->nbuffers; i++) |
| 1937 | if (cam->frame[i].vma_use_count) { |
| 1938 | DBG(3, "VIDIOC_S_CROP failed. " |
| 1939 | "Unmap the buffers first.") |
| 1940 | return -EINVAL; |
| 1941 | } |
| 1942 | |
| 1943 | /* Preserve R,G or B origin */ |
| 1944 | rect->left = (s->_rect.left & 1L) ? |
| 1945 | rect->left | 1L : rect->left & ~1L; |
| 1946 | rect->top = (s->_rect.top & 1L) ? |
| 1947 | rect->top | 1L : rect->top & ~1L; |
| 1948 | |
| 1949 | if (rect->width < 16) |
| 1950 | rect->width = 16; |
| 1951 | if (rect->height < 16) |
| 1952 | rect->height = 16; |
| 1953 | if (rect->width > bounds->width) |
| 1954 | rect->width = bounds->width; |
| 1955 | if (rect->height > bounds->height) |
| 1956 | rect->height = bounds->height; |
| 1957 | if (rect->left < bounds->left) |
| 1958 | rect->left = bounds->left; |
| 1959 | if (rect->top < bounds->top) |
| 1960 | rect->top = bounds->top; |
| 1961 | if (rect->left + rect->width > bounds->left + bounds->width) |
| 1962 | rect->left = bounds->left+bounds->width - rect->width; |
| 1963 | if (rect->top + rect->height > bounds->top + bounds->height) |
| 1964 | rect->top = bounds->top+bounds->height - rect->height; |
| 1965 | |
| 1966 | rect->width &= ~15L; |
| 1967 | rect->height &= ~15L; |
| 1968 | |
| 1969 | if (SN9C102_PRESERVE_IMGSCALE) { |
| 1970 | /* Calculate the actual scaling factor */ |
| 1971 | u32 a, b; |
| 1972 | a = rect->width * rect->height; |
| 1973 | b = pix_format->width * pix_format->height; |
| 1974 | scale = b ? (u8)((a / b) < 4 ? 1 : |
| 1975 | ((a / b) < 16 ? 2 : 4)) : 1; |
| 1976 | } else |
| 1977 | scale = 1; |
| 1978 | |
| 1979 | if (cam->stream == STREAM_ON) |
| 1980 | if ((err = sn9c102_stream_interrupt(cam))) |
| 1981 | return err; |
| 1982 | |
| 1983 | if (copy_to_user(arg, &crop, sizeof(crop))) { |
| 1984 | cam->stream = stream; |
| 1985 | return -EFAULT; |
| 1986 | } |
| 1987 | |
| 1988 | if (cam->module_param.force_munmap || cam->io == IO_READ) |
| 1989 | sn9c102_release_buffers(cam); |
| 1990 | |
| 1991 | err = sn9c102_set_crop(cam, rect); |
| 1992 | if (s->set_crop) |
| 1993 | err += s->set_crop(cam, rect); |
| 1994 | err += sn9c102_set_scale(cam, scale); |
| 1995 | |
| 1996 | if (err) { /* atomic, no rollback in ioctl() */ |
| 1997 | cam->state |= DEV_MISCONFIGURED; |
| 1998 | DBG(1, "VIDIOC_S_CROP failed because of hardware " |
| 1999 | "problems. To use the camera, close and open " |
| 2000 | "/dev/video%d again.", cam->v4ldev->minor) |
| 2001 | return -EIO; |
| 2002 | } |
| 2003 | |
| 2004 | s->pix_format.width = rect->width/scale; |
| 2005 | s->pix_format.height = rect->height/scale; |
| 2006 | memcpy(&(s->_rect), rect, sizeof(*rect)); |
| 2007 | |
| 2008 | if ((cam->module_param.force_munmap || cam->io == IO_READ) && |
| 2009 | nbuffers != sn9c102_request_buffers(cam, nbuffers, |
| 2010 | cam->io)) { |
| 2011 | cam->state |= DEV_MISCONFIGURED; |
| 2012 | DBG(1, "VIDIOC_S_CROP failed because of not enough " |
| 2013 | "memory. To use the camera, close and open " |
| 2014 | "/dev/video%d again.", cam->v4ldev->minor) |
| 2015 | return -ENOMEM; |
| 2016 | } |
| 2017 | |
| 2018 | cam->stream = stream; |
| 2019 | |
| 2020 | return 0; |
| 2021 | } |
| 2022 | |
| 2023 | case VIDIOC_ENUM_FMT: |
| 2024 | { |
| 2025 | struct v4l2_fmtdesc fmtd; |
| 2026 | |
| 2027 | if (copy_from_user(&fmtd, arg, sizeof(fmtd))) |
| 2028 | return -EFAULT; |
| 2029 | |
| 2030 | if (fmtd.index == 0) { |
| 2031 | strcpy(fmtd.description, "bayer rgb"); |
| 2032 | fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8; |
| 2033 | } else if (fmtd.index == 1) { |
| 2034 | strcpy(fmtd.description, "compressed"); |
| 2035 | fmtd.pixelformat = V4L2_PIX_FMT_SN9C10X; |
| 2036 | fmtd.flags = V4L2_FMT_FLAG_COMPRESSED; |
| 2037 | } else |
| 2038 | return -EINVAL; |
| 2039 | |
| 2040 | fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 2041 | memset(&fmtd.reserved, 0, sizeof(fmtd.reserved)); |
| 2042 | |
| 2043 | if (copy_to_user(arg, &fmtd, sizeof(fmtd))) |
| 2044 | return -EFAULT; |
| 2045 | |
| 2046 | return 0; |
| 2047 | } |
| 2048 | |
| 2049 | case VIDIOC_G_FMT: |
| 2050 | { |
| 2051 | struct v4l2_format format; |
| 2052 | struct v4l2_pix_format* pfmt = &(cam->sensor->pix_format); |
| 2053 | |
| 2054 | if (copy_from_user(&format, arg, sizeof(format))) |
| 2055 | return -EFAULT; |
| 2056 | |
| 2057 | if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 2058 | return -EINVAL; |
| 2059 | |
| 2060 | pfmt->bytesperline = (pfmt->pixelformat==V4L2_PIX_FMT_SN9C10X) |
| 2061 | ? 0 : (pfmt->width * pfmt->priv) / 8; |
| 2062 | pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8); |
| 2063 | pfmt->field = V4L2_FIELD_NONE; |
| 2064 | memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt)); |
| 2065 | |
| 2066 | if (copy_to_user(arg, &format, sizeof(format))) |
| 2067 | return -EFAULT; |
| 2068 | |
| 2069 | return 0; |
| 2070 | } |
| 2071 | |
| 2072 | case VIDIOC_TRY_FMT: |
| 2073 | case VIDIOC_S_FMT: |
| 2074 | { |
| 2075 | struct sn9c102_sensor* s = cam->sensor; |
| 2076 | struct v4l2_format format; |
| 2077 | struct v4l2_pix_format* pix; |
| 2078 | struct v4l2_pix_format* pfmt = &(s->pix_format); |
| 2079 | struct v4l2_rect* bounds = &(s->cropcap.bounds); |
| 2080 | struct v4l2_rect rect; |
| 2081 | u8 scale; |
| 2082 | const enum sn9c102_stream_state stream = cam->stream; |
| 2083 | const u32 nbuffers = cam->nbuffers; |
| 2084 | u32 i; |
| 2085 | int err = 0; |
| 2086 | |
| 2087 | if (copy_from_user(&format, arg, sizeof(format))) |
| 2088 | return -EFAULT; |
| 2089 | |
| 2090 | pix = &(format.fmt.pix); |
| 2091 | |
| 2092 | if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 2093 | return -EINVAL; |
| 2094 | |
| 2095 | memcpy(&rect, &(s->_rect), sizeof(rect)); |
| 2096 | |
| 2097 | { /* calculate the actual scaling factor */ |
| 2098 | u32 a, b; |
| 2099 | a = rect.width * rect.height; |
| 2100 | b = pix->width * pix->height; |
| 2101 | scale = b ? (u8)((a / b) < 4 ? 1 : |
| 2102 | ((a / b) < 16 ? 2 : 4)) : 1; |
| 2103 | } |
| 2104 | |
| 2105 | rect.width = scale * pix->width; |
| 2106 | rect.height = scale * pix->height; |
| 2107 | |
| 2108 | if (rect.width < 16) |
| 2109 | rect.width = 16; |
| 2110 | if (rect.height < 16) |
| 2111 | rect.height = 16; |
| 2112 | if (rect.width > bounds->left + bounds->width - rect.left) |
| 2113 | rect.width = bounds->left + bounds->width - rect.left; |
| 2114 | if (rect.height > bounds->top + bounds->height - rect.top) |
| 2115 | rect.height = bounds->top + bounds->height - rect.top; |
| 2116 | |
| 2117 | rect.width &= ~15L; |
| 2118 | rect.height &= ~15L; |
| 2119 | |
| 2120 | { /* adjust the scaling factor */ |
| 2121 | u32 a, b; |
| 2122 | a = rect.width * rect.height; |
| 2123 | b = pix->width * pix->height; |
| 2124 | scale = b ? (u8)((a / b) < 4 ? 1 : |
| 2125 | ((a / b) < 16 ? 2 : 4)) : 1; |
| 2126 | } |
| 2127 | |
| 2128 | pix->width = rect.width / scale; |
| 2129 | pix->height = rect.height / scale; |
| 2130 | |
| 2131 | if (pix->pixelformat != V4L2_PIX_FMT_SN9C10X && |
| 2132 | pix->pixelformat != V4L2_PIX_FMT_SBGGR8) |
| 2133 | pix->pixelformat = pfmt->pixelformat; |
| 2134 | pix->priv = pfmt->priv; /* bpp */ |
| 2135 | pix->colorspace = pfmt->colorspace; |
| 2136 | pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_SN9C10X) |
| 2137 | ? 0 : (pix->width * pix->priv) / 8; |
| 2138 | pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8); |
| 2139 | pix->field = V4L2_FIELD_NONE; |
| 2140 | |
| 2141 | if (cmd == VIDIOC_TRY_FMT) { |
| 2142 | if (copy_to_user(arg, &format, sizeof(format))) |
| 2143 | return -EFAULT; |
| 2144 | return 0; |
| 2145 | } |
| 2146 | |
| 2147 | if (cam->module_param.force_munmap) |
| 2148 | for (i = 0; i < cam->nbuffers; i++) |
| 2149 | if (cam->frame[i].vma_use_count) { |
| 2150 | DBG(3, "VIDIOC_S_FMT failed. " |
| 2151 | "Unmap the buffers first.") |
| 2152 | return -EINVAL; |
| 2153 | } |
| 2154 | |
| 2155 | if (cam->stream == STREAM_ON) |
| 2156 | if ((err = sn9c102_stream_interrupt(cam))) |
| 2157 | return err; |
| 2158 | |
| 2159 | if (copy_to_user(arg, &format, sizeof(format))) { |
| 2160 | cam->stream = stream; |
| 2161 | return -EFAULT; |
| 2162 | } |
| 2163 | |
| 2164 | if (cam->module_param.force_munmap || cam->io == IO_READ) |
| 2165 | sn9c102_release_buffers(cam); |
| 2166 | |
| 2167 | err += sn9c102_set_pix_format(cam, pix); |
| 2168 | err += sn9c102_set_crop(cam, &rect); |
| 2169 | if (s->set_pix_format) |
| 2170 | err += s->set_pix_format(cam, pix); |
| 2171 | if (s->set_crop) |
| 2172 | err += s->set_crop(cam, &rect); |
| 2173 | err += sn9c102_set_scale(cam, scale); |
| 2174 | |
| 2175 | if (err) { /* atomic, no rollback in ioctl() */ |
| 2176 | cam->state |= DEV_MISCONFIGURED; |
| 2177 | DBG(1, "VIDIOC_S_FMT failed because of hardware " |
| 2178 | "problems. To use the camera, close and open " |
| 2179 | "/dev/video%d again.", cam->v4ldev->minor) |
| 2180 | return -EIO; |
| 2181 | } |
| 2182 | |
| 2183 | memcpy(pfmt, pix, sizeof(*pix)); |
| 2184 | memcpy(&(s->_rect), &rect, sizeof(rect)); |
| 2185 | |
| 2186 | if ((cam->module_param.force_munmap || cam->io == IO_READ) && |
| 2187 | nbuffers != sn9c102_request_buffers(cam, nbuffers, |
| 2188 | cam->io)) { |
| 2189 | cam->state |= DEV_MISCONFIGURED; |
| 2190 | DBG(1, "VIDIOC_S_FMT failed because of not enough " |
| 2191 | "memory. To use the camera, close and open " |
| 2192 | "/dev/video%d again.", cam->v4ldev->minor) |
| 2193 | return -ENOMEM; |
| 2194 | } |
| 2195 | |
| 2196 | cam->stream = stream; |
| 2197 | |
| 2198 | return 0; |
| 2199 | } |
| 2200 | |
| 2201 | case VIDIOC_G_JPEGCOMP: |
| 2202 | { |
| 2203 | if (copy_to_user(arg, &cam->compression, |
| 2204 | sizeof(cam->compression))) |
| 2205 | return -EFAULT; |
| 2206 | |
| 2207 | return 0; |
| 2208 | } |
| 2209 | |
| 2210 | case VIDIOC_S_JPEGCOMP: |
| 2211 | { |
| 2212 | struct v4l2_jpegcompression jc; |
| 2213 | const enum sn9c102_stream_state stream = cam->stream; |
| 2214 | int err = 0; |
| 2215 | |
| 2216 | if (copy_from_user(&jc, arg, sizeof(jc))) |
| 2217 | return -EFAULT; |
| 2218 | |
| 2219 | if (jc.quality != 0 && jc.quality != 1) |
| 2220 | return -EINVAL; |
| 2221 | |
| 2222 | if (cam->stream == STREAM_ON) |
| 2223 | if ((err = sn9c102_stream_interrupt(cam))) |
| 2224 | return err; |
| 2225 | |
| 2226 | err += sn9c102_set_compression(cam, &jc); |
| 2227 | if (err) { /* atomic, no rollback in ioctl() */ |
| 2228 | cam->state |= DEV_MISCONFIGURED; |
| 2229 | DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware " |
| 2230 | "problems. To use the camera, close and open " |
| 2231 | "/dev/video%d again.", cam->v4ldev->minor) |
| 2232 | return -EIO; |
| 2233 | } |
| 2234 | |
| 2235 | cam->compression.quality = jc.quality; |
| 2236 | |
| 2237 | cam->stream = stream; |
| 2238 | |
| 2239 | return 0; |
| 2240 | } |
| 2241 | |
| 2242 | case VIDIOC_REQBUFS: |
| 2243 | { |
| 2244 | struct v4l2_requestbuffers rb; |
| 2245 | u32 i; |
| 2246 | int err; |
| 2247 | |
| 2248 | if (copy_from_user(&rb, arg, sizeof(rb))) |
| 2249 | return -EFAULT; |
| 2250 | |
| 2251 | if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || |
| 2252 | rb.memory != V4L2_MEMORY_MMAP) |
| 2253 | return -EINVAL; |
| 2254 | |
| 2255 | if (cam->io == IO_READ) { |
| 2256 | DBG(3, "Close and open the device again to choose " |
| 2257 | "the mmap I/O method") |
| 2258 | return -EINVAL; |
| 2259 | } |
| 2260 | |
| 2261 | for (i = 0; i < cam->nbuffers; i++) |
| 2262 | if (cam->frame[i].vma_use_count) { |
| 2263 | DBG(3, "VIDIOC_REQBUFS failed. " |
| 2264 | "Previous buffers are still mapped.") |
| 2265 | return -EINVAL; |
| 2266 | } |
| 2267 | |
| 2268 | if (cam->stream == STREAM_ON) |
| 2269 | if ((err = sn9c102_stream_interrupt(cam))) |
| 2270 | return err; |
| 2271 | |
| 2272 | sn9c102_empty_framequeues(cam); |
| 2273 | |
| 2274 | sn9c102_release_buffers(cam); |
| 2275 | if (rb.count) |
| 2276 | rb.count = sn9c102_request_buffers(cam, rb.count, |
| 2277 | IO_MMAP); |
| 2278 | |
| 2279 | if (copy_to_user(arg, &rb, sizeof(rb))) { |
| 2280 | sn9c102_release_buffers(cam); |
| 2281 | cam->io = IO_NONE; |
| 2282 | return -EFAULT; |
| 2283 | } |
| 2284 | |
| 2285 | cam->io = rb.count ? IO_MMAP : IO_NONE; |
| 2286 | |
| 2287 | return 0; |
| 2288 | } |
| 2289 | |
| 2290 | case VIDIOC_QUERYBUF: |
| 2291 | { |
| 2292 | struct v4l2_buffer b; |
| 2293 | |
| 2294 | if (copy_from_user(&b, arg, sizeof(b))) |
| 2295 | return -EFAULT; |
| 2296 | |
| 2297 | if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || |
| 2298 | b.index >= cam->nbuffers || cam->io != IO_MMAP) |
| 2299 | return -EINVAL; |
| 2300 | |
| 2301 | memcpy(&b, &cam->frame[b.index].buf, sizeof(b)); |
| 2302 | |
| 2303 | if (cam->frame[b.index].vma_use_count) |
| 2304 | b.flags |= V4L2_BUF_FLAG_MAPPED; |
| 2305 | |
| 2306 | if (cam->frame[b.index].state == F_DONE) |
| 2307 | b.flags |= V4L2_BUF_FLAG_DONE; |
| 2308 | else if (cam->frame[b.index].state != F_UNUSED) |
| 2309 | b.flags |= V4L2_BUF_FLAG_QUEUED; |
| 2310 | |
| 2311 | if (copy_to_user(arg, &b, sizeof(b))) |
| 2312 | return -EFAULT; |
| 2313 | |
| 2314 | return 0; |
| 2315 | } |
| 2316 | |
| 2317 | case VIDIOC_QBUF: |
| 2318 | { |
| 2319 | struct v4l2_buffer b; |
| 2320 | unsigned long lock_flags; |
| 2321 | |
| 2322 | if (copy_from_user(&b, arg, sizeof(b))) |
| 2323 | return -EFAULT; |
| 2324 | |
| 2325 | if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || |
| 2326 | b.index >= cam->nbuffers || cam->io != IO_MMAP) |
| 2327 | return -EINVAL; |
| 2328 | |
| 2329 | if (cam->frame[b.index].state != F_UNUSED) |
| 2330 | return -EINVAL; |
| 2331 | |
| 2332 | cam->frame[b.index].state = F_QUEUED; |
| 2333 | |
| 2334 | spin_lock_irqsave(&cam->queue_lock, lock_flags); |
| 2335 | list_add_tail(&cam->frame[b.index].frame, &cam->inqueue); |
| 2336 | spin_unlock_irqrestore(&cam->queue_lock, lock_flags); |
| 2337 | |
| 2338 | PDBGG("Frame #%lu queued", (unsigned long)b.index) |
| 2339 | |
| 2340 | return 0; |
| 2341 | } |
| 2342 | |
| 2343 | case VIDIOC_DQBUF: |
| 2344 | { |
| 2345 | struct v4l2_buffer b; |
| 2346 | struct sn9c102_frame_t *f; |
| 2347 | unsigned long lock_flags; |
| 2348 | int err = 0; |
| 2349 | |
| 2350 | if (copy_from_user(&b, arg, sizeof(b))) |
| 2351 | return -EFAULT; |
| 2352 | |
| 2353 | if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io!= IO_MMAP) |
| 2354 | return -EINVAL; |
| 2355 | |
| 2356 | if (list_empty(&cam->outqueue)) { |
| 2357 | if (cam->stream == STREAM_OFF) |
| 2358 | return -EINVAL; |
| 2359 | if (filp->f_flags & O_NONBLOCK) |
| 2360 | return -EAGAIN; |
| 2361 | err = wait_event_interruptible |
| 2362 | ( cam->wait_frame, |
| 2363 | (!list_empty(&cam->outqueue)) || |
| 2364 | (cam->state & DEV_DISCONNECTED) || |
| 2365 | (cam->state & DEV_MISCONFIGURED) ); |
| 2366 | if (err) |
| 2367 | return err; |
| 2368 | if (cam->state & DEV_DISCONNECTED) |
| 2369 | return -ENODEV; |
| 2370 | if (cam->state & DEV_MISCONFIGURED) |
| 2371 | return -EIO; |
| 2372 | } |
| 2373 | |
| 2374 | spin_lock_irqsave(&cam->queue_lock, lock_flags); |
| 2375 | f = list_entry(cam->outqueue.next, struct sn9c102_frame_t, |
| 2376 | frame); |
| 2377 | list_del(cam->outqueue.next); |
| 2378 | spin_unlock_irqrestore(&cam->queue_lock, lock_flags); |
| 2379 | |
| 2380 | f->state = F_UNUSED; |
| 2381 | |
| 2382 | memcpy(&b, &f->buf, sizeof(b)); |
| 2383 | if (f->vma_use_count) |
| 2384 | b.flags |= V4L2_BUF_FLAG_MAPPED; |
| 2385 | |
| 2386 | if (copy_to_user(arg, &b, sizeof(b))) |
| 2387 | return -EFAULT; |
| 2388 | |
| 2389 | PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index) |
| 2390 | |
| 2391 | return 0; |
| 2392 | } |
| 2393 | |
| 2394 | case VIDIOC_STREAMON: |
| 2395 | { |
| 2396 | int type; |
| 2397 | |
| 2398 | if (copy_from_user(&type, arg, sizeof(type))) |
| 2399 | return -EFAULT; |
| 2400 | |
| 2401 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP) |
| 2402 | return -EINVAL; |
| 2403 | |
| 2404 | if (list_empty(&cam->inqueue)) |
| 2405 | return -EINVAL; |
| 2406 | |
| 2407 | cam->stream = STREAM_ON; |
| 2408 | |
| 2409 | DBG(3, "Stream on") |
| 2410 | |
| 2411 | return 0; |
| 2412 | } |
| 2413 | |
| 2414 | case VIDIOC_STREAMOFF: |
| 2415 | { |
| 2416 | int type, err; |
| 2417 | |
| 2418 | if (copy_from_user(&type, arg, sizeof(type))) |
| 2419 | return -EFAULT; |
| 2420 | |
| 2421 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP) |
| 2422 | return -EINVAL; |
| 2423 | |
| 2424 | if (cam->stream == STREAM_ON) |
| 2425 | if ((err = sn9c102_stream_interrupt(cam))) |
| 2426 | return err; |
| 2427 | |
| 2428 | sn9c102_empty_framequeues(cam); |
| 2429 | |
| 2430 | DBG(3, "Stream off") |
| 2431 | |
| 2432 | return 0; |
| 2433 | } |
| 2434 | |
| 2435 | case VIDIOC_G_PARM: |
| 2436 | { |
| 2437 | struct v4l2_streamparm sp; |
| 2438 | |
| 2439 | if (copy_from_user(&sp, arg, sizeof(sp))) |
| 2440 | return -EFAULT; |
| 2441 | |
| 2442 | if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 2443 | return -EINVAL; |
| 2444 | |
| 2445 | sp.parm.capture.extendedmode = 0; |
| 2446 | sp.parm.capture.readbuffers = cam->nreadbuffers; |
| 2447 | |
| 2448 | if (copy_to_user(arg, &sp, sizeof(sp))) |
| 2449 | return -EFAULT; |
| 2450 | |
| 2451 | return 0; |
| 2452 | } |
| 2453 | |
| 2454 | case VIDIOC_S_PARM_OLD: |
| 2455 | case VIDIOC_S_PARM: |
| 2456 | { |
| 2457 | struct v4l2_streamparm sp; |
| 2458 | |
| 2459 | if (copy_from_user(&sp, arg, sizeof(sp))) |
| 2460 | return -EFAULT; |
| 2461 | |
| 2462 | if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
| 2463 | return -EINVAL; |
| 2464 | |
| 2465 | sp.parm.capture.extendedmode = 0; |
| 2466 | |
| 2467 | if (sp.parm.capture.readbuffers == 0) |
| 2468 | sp.parm.capture.readbuffers = cam->nreadbuffers; |
| 2469 | |
| 2470 | if (sp.parm.capture.readbuffers > SN9C102_MAX_FRAMES) |
| 2471 | sp.parm.capture.readbuffers = SN9C102_MAX_FRAMES; |
| 2472 | |
| 2473 | if (copy_to_user(arg, &sp, sizeof(sp))) |
| 2474 | return -EFAULT; |
| 2475 | |
| 2476 | cam->nreadbuffers = sp.parm.capture.readbuffers; |
| 2477 | |
| 2478 | return 0; |
| 2479 | } |
| 2480 | |
| 2481 | case VIDIOC_G_STD: |
| 2482 | case VIDIOC_S_STD: |
| 2483 | case VIDIOC_QUERYSTD: |
| 2484 | case VIDIOC_ENUMSTD: |
| 2485 | case VIDIOC_QUERYMENU: |
| 2486 | return -EINVAL; |
| 2487 | |
| 2488 | default: |
| 2489 | return -EINVAL; |
| 2490 | |
| 2491 | } |
| 2492 | } |
| 2493 | |
| 2494 | |
| 2495 | static int sn9c102_ioctl(struct inode* inode, struct file* filp, |
| 2496 | unsigned int cmd, unsigned long arg) |
| 2497 | { |
| 2498 | struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp)); |
| 2499 | int err = 0; |
| 2500 | |
| 2501 | if (down_interruptible(&cam->fileop_sem)) |
| 2502 | return -ERESTARTSYS; |
| 2503 | |
| 2504 | if (cam->state & DEV_DISCONNECTED) { |
| 2505 | DBG(1, "Device not present") |
| 2506 | up(&cam->fileop_sem); |
| 2507 | return -ENODEV; |
| 2508 | } |
| 2509 | |
| 2510 | if (cam->state & DEV_MISCONFIGURED) { |
| 2511 | DBG(1, "The camera is misconfigured. Close and open it again.") |
| 2512 | up(&cam->fileop_sem); |
| 2513 | return -EIO; |
| 2514 | } |
| 2515 | |
| 2516 | err = sn9c102_ioctl_v4l2(inode, filp, cmd, (void __user *)arg); |
| 2517 | |
| 2518 | up(&cam->fileop_sem); |
| 2519 | |
| 2520 | return err; |
| 2521 | } |
| 2522 | |
| 2523 | |
| 2524 | static struct file_operations sn9c102_fops = { |
| 2525 | .owner = THIS_MODULE, |
| 2526 | .open = sn9c102_open, |
| 2527 | .release = sn9c102_release, |
| 2528 | .ioctl = sn9c102_ioctl, |
| 2529 | .read = sn9c102_read, |
| 2530 | .poll = sn9c102_poll, |
| 2531 | .mmap = sn9c102_mmap, |
| 2532 | .llseek = no_llseek, |
| 2533 | }; |
| 2534 | |
| 2535 | /*****************************************************************************/ |
| 2536 | |
| 2537 | /* It exists a single interface only. We do not need to validate anything. */ |
| 2538 | static int |
| 2539 | sn9c102_usb_probe(struct usb_interface* intf, const struct usb_device_id* id) |
| 2540 | { |
| 2541 | struct usb_device *udev = interface_to_usbdev(intf); |
| 2542 | struct sn9c102_device* cam; |
| 2543 | static unsigned int dev_nr = 0; |
| 2544 | unsigned int i, n; |
| 2545 | int err = 0, r; |
| 2546 | |
| 2547 | n = sizeof(sn9c102_id_table)/sizeof(sn9c102_id_table[0]); |
| 2548 | for (i = 0; i < n-1; i++) |
| 2549 | if (le16_to_cpu(udev->descriptor.idVendor) == |
| 2550 | sn9c102_id_table[i].idVendor && |
| 2551 | le16_to_cpu(udev->descriptor.idProduct) == |
| 2552 | sn9c102_id_table[i].idProduct) |
| 2553 | break; |
| 2554 | if (i == n-1) |
| 2555 | return -ENODEV; |
| 2556 | |
| 2557 | if (!(cam = kmalloc(sizeof(struct sn9c102_device), GFP_KERNEL))) |
| 2558 | return -ENOMEM; |
| 2559 | memset(cam, 0, sizeof(*cam)); |
| 2560 | |
| 2561 | cam->usbdev = udev; |
| 2562 | |
| 2563 | memcpy(&cam->dev, &udev->dev, sizeof(struct device)); |
| 2564 | |
| 2565 | if (!(cam->control_buffer = kmalloc(8, GFP_KERNEL))) { |
| 2566 | DBG(1, "kmalloc() failed") |
| 2567 | err = -ENOMEM; |
| 2568 | goto fail; |
| 2569 | } |
| 2570 | memset(cam->control_buffer, 0, 8); |
| 2571 | |
| 2572 | if (!(cam->v4ldev = video_device_alloc())) { |
| 2573 | DBG(1, "video_device_alloc() failed") |
| 2574 | err = -ENOMEM; |
| 2575 | goto fail; |
| 2576 | } |
| 2577 | |
| 2578 | init_MUTEX(&cam->dev_sem); |
| 2579 | |
| 2580 | r = sn9c102_read_reg(cam, 0x00); |
| 2581 | if (r < 0 || r != 0x10) { |
| 2582 | DBG(1, "Sorry, this is not a SN9C10x based camera " |
| 2583 | "(vid/pid 0x%04X/0x%04X)", |
| 2584 | sn9c102_id_table[i].idVendor,sn9c102_id_table[i].idProduct) |
| 2585 | err = -ENODEV; |
| 2586 | goto fail; |
| 2587 | } |
| 2588 | |
| 2589 | cam->bridge = (sn9c102_id_table[i].idProduct & 0xffc0) == 0x6080 ? |
| 2590 | BRIDGE_SN9C103 : BRIDGE_SN9C102; |
| 2591 | switch (cam->bridge) { |
| 2592 | case BRIDGE_SN9C101: |
| 2593 | case BRIDGE_SN9C102: |
| 2594 | DBG(2, "SN9C10[12] PC Camera Controller detected " |
| 2595 | "(vid/pid 0x%04X/0x%04X)", sn9c102_id_table[i].idVendor, |
| 2596 | sn9c102_id_table[i].idProduct) |
| 2597 | break; |
| 2598 | case BRIDGE_SN9C103: |
| 2599 | DBG(2, "SN9C103 PC Camera Controller detected " |
| 2600 | "(vid/pid 0x%04X/0x%04X)", sn9c102_id_table[i].idVendor, |
| 2601 | sn9c102_id_table[i].idProduct) |
| 2602 | break; |
| 2603 | } |
| 2604 | |
| 2605 | for (i = 0; sn9c102_sensor_table[i]; i++) { |
| 2606 | err = sn9c102_sensor_table[i](cam); |
| 2607 | if (!err) |
| 2608 | break; |
| 2609 | } |
| 2610 | |
| 2611 | if (!err && cam->sensor) { |
| 2612 | DBG(2, "%s image sensor detected", cam->sensor->name) |
| 2613 | DBG(3, "Support for %s maintained by %s", |
| 2614 | cam->sensor->name, cam->sensor->maintainer) |
| 2615 | } else { |
| 2616 | DBG(1, "No supported image sensor detected") |
| 2617 | err = -ENODEV; |
| 2618 | goto fail; |
| 2619 | } |
| 2620 | |
| 2621 | if (sn9c102_init(cam)) { |
| 2622 | DBG(1, "Initialization failed. I will retry on open().") |
| 2623 | cam->state |= DEV_MISCONFIGURED; |
| 2624 | } |
| 2625 | |
| 2626 | strcpy(cam->v4ldev->name, "SN9C10x PC Camera"); |
| 2627 | cam->v4ldev->owner = THIS_MODULE; |
| 2628 | cam->v4ldev->type = VID_TYPE_CAPTURE | VID_TYPE_SCALES; |
| 2629 | cam->v4ldev->hardware = VID_HARDWARE_SN9C102; |
| 2630 | cam->v4ldev->fops = &sn9c102_fops; |
| 2631 | cam->v4ldev->minor = video_nr[dev_nr]; |
| 2632 | cam->v4ldev->release = video_device_release; |
| 2633 | video_set_drvdata(cam->v4ldev, cam); |
| 2634 | |
| 2635 | down(&cam->dev_sem); |
| 2636 | |
| 2637 | err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER, |
| 2638 | video_nr[dev_nr]); |
| 2639 | if (err) { |
| 2640 | DBG(1, "V4L2 device registration failed") |
| 2641 | if (err == -ENFILE && video_nr[dev_nr] == -1) |
| 2642 | DBG(1, "Free /dev/videoX node not found") |
| 2643 | video_nr[dev_nr] = -1; |
| 2644 | dev_nr = (dev_nr < SN9C102_MAX_DEVICES-1) ? dev_nr+1 : 0; |
| 2645 | up(&cam->dev_sem); |
| 2646 | goto fail; |
| 2647 | } |
| 2648 | |
| 2649 | DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->minor) |
| 2650 | |
| 2651 | cam->module_param.force_munmap = force_munmap[dev_nr]; |
| 2652 | |
| 2653 | dev_nr = (dev_nr < SN9C102_MAX_DEVICES-1) ? dev_nr+1 : 0; |
| 2654 | |
| 2655 | sn9c102_create_sysfs(cam); |
| 2656 | DBG(2, "Optional device control through 'sysfs' interface ready") |
| 2657 | |
| 2658 | usb_set_intfdata(intf, cam); |
| 2659 | |
| 2660 | up(&cam->dev_sem); |
| 2661 | |
| 2662 | return 0; |
| 2663 | |
| 2664 | fail: |
| 2665 | if (cam) { |
| 2666 | kfree(cam->control_buffer); |
| 2667 | if (cam->v4ldev) |
| 2668 | video_device_release(cam->v4ldev); |
| 2669 | kfree(cam); |
| 2670 | } |
| 2671 | return err; |
| 2672 | } |
| 2673 | |
| 2674 | |
| 2675 | static void sn9c102_usb_disconnect(struct usb_interface* intf) |
| 2676 | { |
| 2677 | struct sn9c102_device* cam = usb_get_intfdata(intf); |
| 2678 | |
| 2679 | if (!cam) |
| 2680 | return; |
| 2681 | |
| 2682 | down_write(&sn9c102_disconnect); |
| 2683 | |
| 2684 | down(&cam->dev_sem); |
| 2685 | |
| 2686 | DBG(2, "Disconnecting %s...", cam->v4ldev->name) |
| 2687 | |
| 2688 | wake_up_interruptible_all(&cam->open); |
| 2689 | |
| 2690 | if (cam->users) { |
| 2691 | DBG(2, "Device /dev/video%d is open! Deregistration and " |
| 2692 | "memory deallocation are deferred on close.", |
| 2693 | cam->v4ldev->minor) |
| 2694 | cam->state |= DEV_MISCONFIGURED; |
| 2695 | sn9c102_stop_transfer(cam); |
| 2696 | cam->state |= DEV_DISCONNECTED; |
| 2697 | wake_up_interruptible(&cam->wait_frame); |
| 2698 | wake_up_interruptible(&cam->wait_stream); |
| 2699 | } else { |
| 2700 | cam->state |= DEV_DISCONNECTED; |
| 2701 | sn9c102_release_resources(cam); |
| 2702 | } |
| 2703 | |
| 2704 | up(&cam->dev_sem); |
| 2705 | |
| 2706 | if (!cam->users) |
| 2707 | kfree(cam); |
| 2708 | |
| 2709 | up_write(&sn9c102_disconnect); |
| 2710 | } |
| 2711 | |
| 2712 | |
| 2713 | static struct usb_driver sn9c102_usb_driver = { |
| 2714 | .owner = THIS_MODULE, |
| 2715 | .name = "sn9c102", |
| 2716 | .id_table = sn9c102_id_table, |
| 2717 | .probe = sn9c102_usb_probe, |
| 2718 | .disconnect = sn9c102_usb_disconnect, |
| 2719 | }; |
| 2720 | |
| 2721 | /*****************************************************************************/ |
| 2722 | |
| 2723 | static int __init sn9c102_module_init(void) |
| 2724 | { |
| 2725 | int err = 0; |
| 2726 | |
| 2727 | KDBG(2, SN9C102_MODULE_NAME " v" SN9C102_MODULE_VERSION) |
| 2728 | KDBG(3, SN9C102_MODULE_AUTHOR) |
| 2729 | |
| 2730 | if ((err = usb_register(&sn9c102_usb_driver))) |
| 2731 | KDBG(1, "usb_register() failed") |
| 2732 | |
| 2733 | return err; |
| 2734 | } |
| 2735 | |
| 2736 | |
| 2737 | static void __exit sn9c102_module_exit(void) |
| 2738 | { |
| 2739 | usb_deregister(&sn9c102_usb_driver); |
| 2740 | } |
| 2741 | |
| 2742 | |
| 2743 | module_init(sn9c102_module_init); |
| 2744 | module_exit(sn9c102_module_exit); |