1 /* 2 em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB 3 video capture devices 4 5 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> 6 Markus Rechberger <mrechberger@gmail.com> 7 Mauro Carvalho Chehab <mchehab@infradead.org> 8 Sascha Sommer <saschasommer@freenet.de> 9 Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com> 10 11 Some parts based on SN9C10x PC Camera Controllers GPL driver made 12 by Luca Risolia <luca.risolia@studio.unibo.it> 13 14 This program is free software; you can redistribute it and/or modify 15 it under the terms of the GNU General Public License as published by 16 the Free Software Foundation; either version 2 of the License, or 17 (at your option) any later version. 18 19 This program is distributed in the hope that it will be useful, 20 but WITHOUT ANY WARRANTY; without even the implied warranty of 21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 GNU General Public License for more details. 23 24 You should have received a copy of the GNU General Public License 25 along with this program; if not, write to the Free Software 26 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 27 */ 28 29 #include <linux/init.h> 30 #include <linux/list.h> 31 #include <linux/module.h> 32 #include <linux/kernel.h> 33 #include <linux/bitmap.h> 34 #include <linux/usb.h> 35 #include <linux/i2c.h> 36 #include <linux/mm.h> 37 #include <linux/mutex.h> 38 #include <linux/slab.h> 39 40 #include "em28xx.h" 41 #include "em28xx-v4l.h" 42 #include <media/v4l2-common.h> 43 #include <media/v4l2-ioctl.h> 44 #include <media/v4l2-event.h> 45 #include <media/v4l2-clk.h> 46 #include <media/msp3400.h> 47 #include <media/tuner.h> 48 49 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \ 50 "Markus Rechberger <mrechberger@gmail.com>, " \ 51 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \ 52 "Sascha Sommer <saschasommer@freenet.de>" 53 54 static unsigned int isoc_debug; 55 module_param(isoc_debug, int, 0644); 56 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]"); 57 58 static unsigned int disable_vbi; 59 module_param(disable_vbi, int, 0644); 60 MODULE_PARM_DESC(disable_vbi, "disable vbi support"); 61 62 static int alt; 63 module_param(alt, int, 0644); 64 MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint"); 65 66 #define em28xx_videodbg(fmt, arg...) do {\ 67 if (video_debug) \ 68 printk(KERN_INFO "%s %s :"fmt, \ 69 dev->name, __func__ , ##arg); } while (0) 70 71 #define em28xx_isocdbg(fmt, arg...) \ 72 do {\ 73 if (isoc_debug) { \ 74 printk(KERN_INFO "%s %s :"fmt, \ 75 dev->name, __func__ , ##arg); \ 76 } \ 77 } while (0) 78 79 MODULE_AUTHOR(DRIVER_AUTHOR); 80 MODULE_DESCRIPTION(DRIVER_DESC " - v4l2 interface"); 81 MODULE_LICENSE("GPL"); 82 MODULE_VERSION(EM28XX_VERSION); 83 84 #define EM25XX_FRMDATAHDR_BYTE1 0x02 85 #define EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE 0x20 86 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_END 0x02 87 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_ID 0x01 88 #define EM25XX_FRMDATAHDR_BYTE2_MASK (EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE | \ 89 EM25XX_FRMDATAHDR_BYTE2_FRAME_END | \ 90 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID) 91 92 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; 93 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; 94 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; 95 96 module_param_array(video_nr, int, NULL, 0444); 97 module_param_array(vbi_nr, int, NULL, 0444); 98 module_param_array(radio_nr, int, NULL, 0444); 99 MODULE_PARM_DESC(video_nr, "video device numbers"); 100 MODULE_PARM_DESC(vbi_nr, "vbi device numbers"); 101 MODULE_PARM_DESC(radio_nr, "radio device numbers"); 102 103 static unsigned int video_debug; 104 module_param(video_debug, int, 0644); 105 MODULE_PARM_DESC(video_debug, "enable debug messages [video]"); 106 107 /* supported video standards */ 108 static struct em28xx_fmt format[] = { 109 { 110 .name = "16 bpp YUY2, 4:2:2, packed", 111 .fourcc = V4L2_PIX_FMT_YUYV, 112 .depth = 16, 113 .reg = EM28XX_OUTFMT_YUV422_Y0UY1V, 114 }, { 115 .name = "16 bpp RGB 565, LE", 116 .fourcc = V4L2_PIX_FMT_RGB565, 117 .depth = 16, 118 .reg = EM28XX_OUTFMT_RGB_16_656, 119 }, { 120 .name = "8 bpp Bayer BGBG..GRGR", 121 .fourcc = V4L2_PIX_FMT_SBGGR8, 122 .depth = 8, 123 .reg = EM28XX_OUTFMT_RGB_8_BGBG, 124 }, { 125 .name = "8 bpp Bayer GRGR..BGBG", 126 .fourcc = V4L2_PIX_FMT_SGRBG8, 127 .depth = 8, 128 .reg = EM28XX_OUTFMT_RGB_8_GRGR, 129 }, { 130 .name = "8 bpp Bayer GBGB..RGRG", 131 .fourcc = V4L2_PIX_FMT_SGBRG8, 132 .depth = 8, 133 .reg = EM28XX_OUTFMT_RGB_8_GBGB, 134 }, { 135 .name = "12 bpp YUV411", 136 .fourcc = V4L2_PIX_FMT_YUV411P, 137 .depth = 12, 138 .reg = EM28XX_OUTFMT_YUV411, 139 }, 140 }; 141 142 /*FIXME: maxw should be dependent of alt mode */ 143 static inline unsigned int norm_maxw(struct em28xx *dev) 144 { 145 struct em28xx_v4l2 *v4l2 = dev->v4l2; 146 147 if (dev->board.is_webcam) 148 return v4l2->sensor_xres; 149 150 if (dev->board.max_range_640_480) 151 return 640; 152 153 return 720; 154 } 155 156 static inline unsigned int norm_maxh(struct em28xx *dev) 157 { 158 struct em28xx_v4l2 *v4l2 = dev->v4l2; 159 160 if (dev->board.is_webcam) 161 return v4l2->sensor_yres; 162 163 if (dev->board.max_range_640_480) 164 return 480; 165 166 return (v4l2->norm & V4L2_STD_625_50) ? 576 : 480; 167 } 168 169 static int em28xx_vbi_supported(struct em28xx *dev) 170 { 171 /* Modprobe option to manually disable */ 172 if (disable_vbi == 1) 173 return 0; 174 175 if (dev->board.is_webcam) 176 return 0; 177 178 /* FIXME: check subdevices for VBI support */ 179 180 if (dev->chip_id == CHIP_ID_EM2860 || 181 dev->chip_id == CHIP_ID_EM2883) 182 return 1; 183 184 /* Version of em28xx that does not support VBI */ 185 return 0; 186 } 187 188 /* 189 * em28xx_wake_i2c() 190 * configure i2c attached devices 191 */ 192 static void em28xx_wake_i2c(struct em28xx *dev) 193 { 194 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev; 195 196 v4l2_device_call_all(v4l2_dev, 0, core, reset, 0); 197 v4l2_device_call_all(v4l2_dev, 0, video, s_routing, 198 INPUT(dev->ctl_input)->vmux, 0, 0); 199 v4l2_device_call_all(v4l2_dev, 0, video, s_stream, 0); 200 } 201 202 static int em28xx_colorlevels_set_default(struct em28xx *dev) 203 { 204 em28xx_write_reg(dev, EM28XX_R20_YGAIN, CONTRAST_DEFAULT); 205 em28xx_write_reg(dev, EM28XX_R21_YOFFSET, BRIGHTNESS_DEFAULT); 206 em28xx_write_reg(dev, EM28XX_R22_UVGAIN, SATURATION_DEFAULT); 207 em28xx_write_reg(dev, EM28XX_R23_UOFFSET, BLUE_BALANCE_DEFAULT); 208 em28xx_write_reg(dev, EM28XX_R24_VOFFSET, RED_BALANCE_DEFAULT); 209 em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, SHARPNESS_DEFAULT); 210 211 em28xx_write_reg(dev, EM28XX_R14_GAMMA, 0x20); 212 em28xx_write_reg(dev, EM28XX_R15_RGAIN, 0x20); 213 em28xx_write_reg(dev, EM28XX_R16_GGAIN, 0x20); 214 em28xx_write_reg(dev, EM28XX_R17_BGAIN, 0x20); 215 em28xx_write_reg(dev, EM28XX_R18_ROFFSET, 0x00); 216 em28xx_write_reg(dev, EM28XX_R19_GOFFSET, 0x00); 217 return em28xx_write_reg(dev, EM28XX_R1A_BOFFSET, 0x00); 218 } 219 220 static int em28xx_set_outfmt(struct em28xx *dev) 221 { 222 int ret; 223 u8 fmt, vinctrl; 224 struct em28xx_v4l2 *v4l2 = dev->v4l2; 225 226 fmt = v4l2->format->reg; 227 if (!dev->is_em25xx) 228 fmt |= 0x20; 229 /* 230 * NOTE: it's not clear if this is really needed ! 231 * The datasheets say bit 5 is a reserved bit and devices seem to work 232 * fine without it. But the Windows driver sets it for em2710/50+em28xx 233 * devices and we've always been setting it, too. 234 * 235 * em2765 (em25xx, em276x/7x/8x) devices do NOT work with this bit set, 236 * it's likely used for an additional (compressed ?) format there. 237 */ 238 ret = em28xx_write_reg(dev, EM28XX_R27_OUTFMT, fmt); 239 if (ret < 0) 240 return ret; 241 242 ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, v4l2->vinmode); 243 if (ret < 0) 244 return ret; 245 246 vinctrl = v4l2->vinctl; 247 if (em28xx_vbi_supported(dev) == 1) { 248 vinctrl |= EM28XX_VINCTRL_VBI_RAW; 249 em28xx_write_reg(dev, EM28XX_R34_VBI_START_H, 0x00); 250 em28xx_write_reg(dev, EM28XX_R36_VBI_WIDTH, v4l2->vbi_width/4); 251 em28xx_write_reg(dev, EM28XX_R37_VBI_HEIGHT, v4l2->vbi_height); 252 if (v4l2->norm & V4L2_STD_525_60) { 253 /* NTSC */ 254 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x09); 255 } else if (v4l2->norm & V4L2_STD_625_50) { 256 /* PAL */ 257 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x07); 258 } 259 } 260 261 return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, vinctrl); 262 } 263 264 static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax, 265 u8 ymin, u8 ymax) 266 { 267 em28xx_videodbg("em28xx Scale: (%d,%d)-(%d,%d)\n", 268 xmin, ymin, xmax, ymax); 269 270 em28xx_write_regs(dev, EM28XX_R28_XMIN, &xmin, 1); 271 em28xx_write_regs(dev, EM28XX_R29_XMAX, &xmax, 1); 272 em28xx_write_regs(dev, EM28XX_R2A_YMIN, &ymin, 1); 273 return em28xx_write_regs(dev, EM28XX_R2B_YMAX, &ymax, 1); 274 } 275 276 static void em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart, 277 u16 width, u16 height) 278 { 279 u8 cwidth = width >> 2; 280 u8 cheight = height >> 2; 281 u8 overflow = (height >> 9 & 0x02) | (width >> 10 & 0x01); 282 /* NOTE: size limit: 2047x1023 = 2MPix */ 283 284 em28xx_videodbg("capture area set to (%d,%d): %dx%d\n", 285 hstart, vstart, 286 ((overflow & 2) << 9 | cwidth << 2), 287 ((overflow & 1) << 10 | cheight << 2)); 288 289 em28xx_write_regs(dev, EM28XX_R1C_HSTART, &hstart, 1); 290 em28xx_write_regs(dev, EM28XX_R1D_VSTART, &vstart, 1); 291 em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, &cwidth, 1); 292 em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, &cheight, 1); 293 em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1); 294 295 /* FIXME: function/meaning of these registers ? */ 296 /* FIXME: align width+height to multiples of 4 ?! */ 297 if (dev->is_em25xx) { 298 em28xx_write_reg(dev, 0x34, width >> 4); 299 em28xx_write_reg(dev, 0x35, height >> 4); 300 } 301 } 302 303 static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v) 304 { 305 u8 mode = 0x00; 306 /* the em2800 scaler only supports scaling down to 50% */ 307 308 if (dev->board.is_em2800) { 309 mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00); 310 } else { 311 u8 buf[2]; 312 313 buf[0] = h; 314 buf[1] = h >> 8; 315 em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2); 316 317 buf[0] = v; 318 buf[1] = v >> 8; 319 em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2); 320 /* it seems that both H and V scalers must be active 321 to work correctly */ 322 mode = (h || v) ? 0x30 : 0x00; 323 } 324 return em28xx_write_reg(dev, EM28XX_R26_COMPR, mode); 325 } 326 327 /* FIXME: this only function read values from dev */ 328 static int em28xx_resolution_set(struct em28xx *dev) 329 { 330 struct em28xx_v4l2 *v4l2 = dev->v4l2; 331 int width = norm_maxw(dev); 332 int height = norm_maxh(dev); 333 334 /* Properly setup VBI */ 335 v4l2->vbi_width = 720; 336 if (v4l2->norm & V4L2_STD_525_60) 337 v4l2->vbi_height = 12; 338 else 339 v4l2->vbi_height = 18; 340 341 em28xx_set_outfmt(dev); 342 343 em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2); 344 345 /* If we don't set the start position to 2 in VBI mode, we end up 346 with line 20/21 being YUYV encoded instead of being in 8-bit 347 greyscale. The core of the issue is that line 21 (and line 23 for 348 PAL WSS) are inside of active video region, and as a result they 349 get the pixelformatting associated with that area. So by cropping 350 it out, we end up with the same format as the rest of the VBI 351 region */ 352 if (em28xx_vbi_supported(dev) == 1) 353 em28xx_capture_area_set(dev, 0, 2, width, height); 354 else 355 em28xx_capture_area_set(dev, 0, 0, width, height); 356 357 return em28xx_scaler_set(dev, v4l2->hscale, v4l2->vscale); 358 } 359 360 /* Set USB alternate setting for analog video */ 361 static int em28xx_set_alternate(struct em28xx *dev) 362 { 363 struct em28xx_v4l2 *v4l2 = dev->v4l2; 364 int errCode; 365 int i; 366 unsigned int min_pkt_size = v4l2->width * 2 + 4; 367 368 /* NOTE: for isoc transfers, only alt settings > 0 are allowed 369 bulk transfers seem to work only with alt=0 ! */ 370 dev->alt = 0; 371 if ((alt > 0) && (alt < dev->num_alt)) { 372 em28xx_videodbg("alternate forced to %d\n", dev->alt); 373 dev->alt = alt; 374 goto set_alt; 375 } 376 if (dev->analog_xfer_bulk) 377 goto set_alt; 378 379 /* When image size is bigger than a certain value, 380 the frame size should be increased, otherwise, only 381 green screen will be received. 382 */ 383 if (v4l2->width * 2 * v4l2->height > 720 * 240 * 2) 384 min_pkt_size *= 2; 385 386 for (i = 0; i < dev->num_alt; i++) { 387 /* stop when the selected alt setting offers enough bandwidth */ 388 if (dev->alt_max_pkt_size_isoc[i] >= min_pkt_size) { 389 dev->alt = i; 390 break; 391 /* otherwise make sure that we end up with the maximum bandwidth 392 because the min_pkt_size equation might be wrong... 393 */ 394 } else if (dev->alt_max_pkt_size_isoc[i] > 395 dev->alt_max_pkt_size_isoc[dev->alt]) 396 dev->alt = i; 397 } 398 399 set_alt: 400 /* NOTE: for bulk transfers, we need to call usb_set_interface() 401 * even if the previous settings were the same. Otherwise streaming 402 * fails with all urbs having status = -EOVERFLOW ! */ 403 if (dev->analog_xfer_bulk) { 404 dev->max_pkt_size = 512; /* USB 2.0 spec */ 405 dev->packet_multiplier = EM28XX_BULK_PACKET_MULTIPLIER; 406 } else { /* isoc */ 407 em28xx_videodbg("minimum isoc packet size: %u (alt=%d)\n", 408 min_pkt_size, dev->alt); 409 dev->max_pkt_size = 410 dev->alt_max_pkt_size_isoc[dev->alt]; 411 dev->packet_multiplier = EM28XX_NUM_ISOC_PACKETS; 412 } 413 em28xx_videodbg("setting alternate %d with wMaxPacketSize=%u\n", 414 dev->alt, dev->max_pkt_size); 415 errCode = usb_set_interface(dev->udev, dev->ifnum, dev->alt); 416 if (errCode < 0) { 417 em28xx_errdev("cannot change alternate number to %d (error=%i)\n", 418 dev->alt, errCode); 419 return errCode; 420 } 421 return 0; 422 } 423 424 /* ------------------------------------------------------------------ 425 DMA and thread functions 426 ------------------------------------------------------------------*/ 427 428 /* 429 * Finish the current buffer 430 */ 431 static inline void finish_buffer(struct em28xx *dev, 432 struct em28xx_buffer *buf) 433 { 434 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field); 435 436 buf->vb.v4l2_buf.sequence = dev->v4l2->field_count++; 437 if (dev->v4l2->progressive) 438 buf->vb.v4l2_buf.field = V4L2_FIELD_NONE; 439 else 440 buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED; 441 v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp); 442 443 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_DONE); 444 } 445 446 /* 447 * Copy picture data from USB buffer to videobuf buffer 448 */ 449 static void em28xx_copy_video(struct em28xx *dev, 450 struct em28xx_buffer *buf, 451 unsigned char *usb_buf, 452 unsigned long len) 453 { 454 struct em28xx_v4l2 *v4l2 = dev->v4l2; 455 void *fieldstart, *startwrite, *startread; 456 int linesdone, currlinedone, offset, lencopy, remain; 457 int bytesperline = v4l2->width << 1; 458 459 if (buf->pos + len > buf->length) 460 len = buf->length - buf->pos; 461 462 startread = usb_buf; 463 remain = len; 464 465 if (v4l2->progressive || buf->top_field) 466 fieldstart = buf->vb_buf; 467 else /* interlaced mode, even nr. of lines */ 468 fieldstart = buf->vb_buf + bytesperline; 469 470 linesdone = buf->pos / bytesperline; 471 currlinedone = buf->pos % bytesperline; 472 473 if (v4l2->progressive) 474 offset = linesdone * bytesperline + currlinedone; 475 else 476 offset = linesdone * bytesperline * 2 + currlinedone; 477 478 startwrite = fieldstart + offset; 479 lencopy = bytesperline - currlinedone; 480 lencopy = lencopy > remain ? remain : lencopy; 481 482 if ((char *)startwrite + lencopy > (char *)buf->vb_buf + buf->length) { 483 em28xx_isocdbg("Overflow of %zu bytes past buffer end (1)\n", 484 ((char *)startwrite + lencopy) - 485 ((char *)buf->vb_buf + buf->length)); 486 remain = (char *)buf->vb_buf + buf->length - 487 (char *)startwrite; 488 lencopy = remain; 489 } 490 if (lencopy <= 0) 491 return; 492 memcpy(startwrite, startread, lencopy); 493 494 remain -= lencopy; 495 496 while (remain > 0) { 497 if (v4l2->progressive) 498 startwrite += lencopy; 499 else 500 startwrite += lencopy + bytesperline; 501 startread += lencopy; 502 if (bytesperline > remain) 503 lencopy = remain; 504 else 505 lencopy = bytesperline; 506 507 if ((char *)startwrite + lencopy > (char *)buf->vb_buf + 508 buf->length) { 509 em28xx_isocdbg("Overflow of %zu bytes past buffer end" 510 "(2)\n", 511 ((char *)startwrite + lencopy) - 512 ((char *)buf->vb_buf + buf->length)); 513 lencopy = remain = (char *)buf->vb_buf + buf->length - 514 (char *)startwrite; 515 } 516 if (lencopy <= 0) 517 break; 518 519 memcpy(startwrite, startread, lencopy); 520 521 remain -= lencopy; 522 } 523 524 buf->pos += len; 525 } 526 527 /* 528 * Copy VBI data from USB buffer to videobuf buffer 529 */ 530 static void em28xx_copy_vbi(struct em28xx *dev, 531 struct em28xx_buffer *buf, 532 unsigned char *usb_buf, 533 unsigned long len) 534 { 535 unsigned int offset; 536 537 if (buf->pos + len > buf->length) 538 len = buf->length - buf->pos; 539 540 offset = buf->pos; 541 /* Make sure the bottom field populates the second half of the frame */ 542 if (buf->top_field == 0) 543 offset += dev->v4l2->vbi_width * dev->v4l2->vbi_height; 544 545 memcpy(buf->vb_buf + offset, usb_buf, len); 546 buf->pos += len; 547 } 548 549 static inline void print_err_status(struct em28xx *dev, 550 int packet, int status) 551 { 552 char *errmsg = "Unknown"; 553 554 switch (status) { 555 case -ENOENT: 556 errmsg = "unlinked synchronuously"; 557 break; 558 case -ECONNRESET: 559 errmsg = "unlinked asynchronuously"; 560 break; 561 case -ENOSR: 562 errmsg = "Buffer error (overrun)"; 563 break; 564 case -EPIPE: 565 errmsg = "Stalled (device not responding)"; 566 break; 567 case -EOVERFLOW: 568 errmsg = "Babble (bad cable?)"; 569 break; 570 case -EPROTO: 571 errmsg = "Bit-stuff error (bad cable?)"; 572 break; 573 case -EILSEQ: 574 errmsg = "CRC/Timeout (could be anything)"; 575 break; 576 case -ETIME: 577 errmsg = "Device does not respond"; 578 break; 579 } 580 if (packet < 0) { 581 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg); 582 } else { 583 em28xx_isocdbg("URB packet %d, status %d [%s].\n", 584 packet, status, errmsg); 585 } 586 } 587 588 /* 589 * get the next available buffer from dma queue 590 */ 591 static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev, 592 struct em28xx_dmaqueue *dma_q) 593 { 594 struct em28xx_buffer *buf; 595 596 if (list_empty(&dma_q->active)) { 597 em28xx_isocdbg("No active queue to serve\n"); 598 return NULL; 599 } 600 601 /* Get the next buffer */ 602 buf = list_entry(dma_q->active.next, struct em28xx_buffer, list); 603 /* Cleans up buffer - Useful for testing for frame/URB loss */ 604 list_del(&buf->list); 605 buf->pos = 0; 606 buf->vb_buf = buf->mem; 607 608 return buf; 609 } 610 611 /* 612 * Finish the current buffer if completed and prepare for the next field 613 */ 614 static struct em28xx_buffer * 615 finish_field_prepare_next(struct em28xx *dev, 616 struct em28xx_buffer *buf, 617 struct em28xx_dmaqueue *dma_q) 618 { 619 struct em28xx_v4l2 *v4l2 = dev->v4l2; 620 621 if (v4l2->progressive || v4l2->top_field) { /* Brand new frame */ 622 if (buf != NULL) 623 finish_buffer(dev, buf); 624 buf = get_next_buf(dev, dma_q); 625 } 626 if (buf != NULL) { 627 buf->top_field = v4l2->top_field; 628 buf->pos = 0; 629 } 630 631 return buf; 632 } 633 634 /* 635 * Process data packet according to the em2710/em2750/em28xx frame data format 636 */ 637 static inline void process_frame_data_em28xx(struct em28xx *dev, 638 unsigned char *data_pkt, 639 unsigned int data_len) 640 { 641 struct em28xx_v4l2 *v4l2 = dev->v4l2; 642 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf; 643 struct em28xx_buffer *vbi_buf = dev->usb_ctl.vbi_buf; 644 struct em28xx_dmaqueue *dma_q = &dev->vidq; 645 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq; 646 647 /* capture type 0 = vbi start 648 capture type 1 = vbi in progress 649 capture type 2 = video start 650 capture type 3 = video in progress */ 651 if (data_len >= 4) { 652 /* NOTE: Headers are always 4 bytes and 653 * never split across packets */ 654 if (data_pkt[0] == 0x88 && data_pkt[1] == 0x88 && 655 data_pkt[2] == 0x88 && data_pkt[3] == 0x88) { 656 /* Continuation */ 657 data_pkt += 4; 658 data_len -= 4; 659 } else if (data_pkt[0] == 0x33 && data_pkt[1] == 0x95) { 660 /* Field start (VBI mode) */ 661 v4l2->capture_type = 0; 662 v4l2->vbi_read = 0; 663 em28xx_isocdbg("VBI START HEADER !!!\n"); 664 v4l2->top_field = !(data_pkt[2] & 1); 665 data_pkt += 4; 666 data_len -= 4; 667 } else if (data_pkt[0] == 0x22 && data_pkt[1] == 0x5a) { 668 /* Field start (VBI disabled) */ 669 v4l2->capture_type = 2; 670 em28xx_isocdbg("VIDEO START HEADER !!!\n"); 671 v4l2->top_field = !(data_pkt[2] & 1); 672 data_pkt += 4; 673 data_len -= 4; 674 } 675 } 676 /* NOTE: With bulk transfers, intermediate data packets 677 * have no continuation header */ 678 679 if (v4l2->capture_type == 0) { 680 vbi_buf = finish_field_prepare_next(dev, vbi_buf, vbi_dma_q); 681 dev->usb_ctl.vbi_buf = vbi_buf; 682 v4l2->capture_type = 1; 683 } 684 685 if (v4l2->capture_type == 1) { 686 int vbi_size = v4l2->vbi_width * v4l2->vbi_height; 687 int vbi_data_len = ((v4l2->vbi_read + data_len) > vbi_size) ? 688 (vbi_size - v4l2->vbi_read) : data_len; 689 690 /* Copy VBI data */ 691 if (vbi_buf != NULL) 692 em28xx_copy_vbi(dev, vbi_buf, data_pkt, vbi_data_len); 693 v4l2->vbi_read += vbi_data_len; 694 695 if (vbi_data_len < data_len) { 696 /* Continue with copying video data */ 697 v4l2->capture_type = 2; 698 data_pkt += vbi_data_len; 699 data_len -= vbi_data_len; 700 } 701 } 702 703 if (v4l2->capture_type == 2) { 704 buf = finish_field_prepare_next(dev, buf, dma_q); 705 dev->usb_ctl.vid_buf = buf; 706 v4l2->capture_type = 3; 707 } 708 709 if (v4l2->capture_type == 3 && buf != NULL && data_len > 0) 710 em28xx_copy_video(dev, buf, data_pkt, data_len); 711 } 712 713 /* 714 * Process data packet according to the em25xx/em276x/7x/8x frame data format 715 */ 716 static inline void process_frame_data_em25xx(struct em28xx *dev, 717 unsigned char *data_pkt, 718 unsigned int data_len) 719 { 720 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf; 721 struct em28xx_dmaqueue *dmaq = &dev->vidq; 722 struct em28xx_v4l2 *v4l2 = dev->v4l2; 723 bool frame_end = false; 724 725 /* Check for header */ 726 /* NOTE: at least with bulk transfers, only the first packet 727 * has a header and has always set the FRAME_END bit */ 728 if (data_len >= 2) { /* em25xx header is only 2 bytes long */ 729 if ((data_pkt[0] == EM25XX_FRMDATAHDR_BYTE1) && 730 ((data_pkt[1] & ~EM25XX_FRMDATAHDR_BYTE2_MASK) == 0x00)) { 731 v4l2->top_field = !(data_pkt[1] & 732 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID); 733 frame_end = data_pkt[1] & 734 EM25XX_FRMDATAHDR_BYTE2_FRAME_END; 735 data_pkt += 2; 736 data_len -= 2; 737 } 738 739 /* Finish field and prepare next (BULK only) */ 740 if (dev->analog_xfer_bulk && frame_end) { 741 buf = finish_field_prepare_next(dev, buf, dmaq); 742 dev->usb_ctl.vid_buf = buf; 743 } 744 /* NOTE: in ISOC mode when a new frame starts and buf==NULL, 745 * we COULD already prepare a buffer here to avoid skipping the 746 * first frame. 747 */ 748 } 749 750 /* Copy data */ 751 if (buf != NULL && data_len > 0) 752 em28xx_copy_video(dev, buf, data_pkt, data_len); 753 754 /* Finish frame (ISOC only) => avoids lag of 1 frame */ 755 if (!dev->analog_xfer_bulk && frame_end) { 756 buf = finish_field_prepare_next(dev, buf, dmaq); 757 dev->usb_ctl.vid_buf = buf; 758 } 759 760 /* NOTE: Tested with USB bulk transfers only ! 761 * The wording in the datasheet suggests that isoc might work different. 762 * The current code assumes that with isoc transfers each packet has a 763 * header like with the other em28xx devices. 764 */ 765 /* NOTE: Support for interlaced mode is pure theory. It has not been 766 * tested and it is unknown if these devices actually support it. */ 767 /* NOTE: No VBI support yet (these chips likely do not support VBI). */ 768 } 769 770 /* Processes and copies the URB data content (video and VBI data) */ 771 static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb) 772 { 773 int xfer_bulk, num_packets, i; 774 unsigned char *usb_data_pkt; 775 unsigned int usb_data_len; 776 777 if (!dev) 778 return 0; 779 780 if (dev->disconnected) 781 return 0; 782 783 if (urb->status < 0) 784 print_err_status(dev, -1, urb->status); 785 786 xfer_bulk = usb_pipebulk(urb->pipe); 787 788 if (xfer_bulk) /* bulk */ 789 num_packets = 1; 790 else /* isoc */ 791 num_packets = urb->number_of_packets; 792 793 for (i = 0; i < num_packets; i++) { 794 if (xfer_bulk) { /* bulk */ 795 usb_data_len = urb->actual_length; 796 797 usb_data_pkt = urb->transfer_buffer; 798 } else { /* isoc */ 799 if (urb->iso_frame_desc[i].status < 0) { 800 print_err_status(dev, i, 801 urb->iso_frame_desc[i].status); 802 if (urb->iso_frame_desc[i].status != -EPROTO) 803 continue; 804 } 805 806 usb_data_len = urb->iso_frame_desc[i].actual_length; 807 if (usb_data_len > dev->max_pkt_size) { 808 em28xx_isocdbg("packet bigger than packet size"); 809 continue; 810 } 811 812 usb_data_pkt = urb->transfer_buffer + 813 urb->iso_frame_desc[i].offset; 814 } 815 816 if (usb_data_len == 0) { 817 /* NOTE: happens very often with isoc transfers */ 818 /* em28xx_usbdbg("packet %d is empty",i); - spammy */ 819 continue; 820 } 821 822 if (dev->is_em25xx) 823 process_frame_data_em25xx(dev, 824 usb_data_pkt, usb_data_len); 825 else 826 process_frame_data_em28xx(dev, 827 usb_data_pkt, usb_data_len); 828 829 } 830 return 1; 831 } 832 833 static int get_ressource(enum v4l2_buf_type f_type) 834 { 835 switch (f_type) { 836 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 837 return EM28XX_RESOURCE_VIDEO; 838 case V4L2_BUF_TYPE_VBI_CAPTURE: 839 return EM28XX_RESOURCE_VBI; 840 default: 841 BUG(); 842 return 0; 843 } 844 } 845 846 /* Usage lock check functions */ 847 static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type) 848 { 849 int res_type = get_ressource(f_type); 850 851 /* is it free? */ 852 if (dev->resources & res_type) { 853 /* no, someone else uses it */ 854 return -EBUSY; 855 } 856 857 /* it's free, grab it */ 858 dev->resources |= res_type; 859 em28xx_videodbg("res: get %d\n", res_type); 860 return 0; 861 } 862 863 static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type) 864 { 865 int res_type = get_ressource(f_type); 866 867 dev->resources &= ~res_type; 868 em28xx_videodbg("res: put %d\n", res_type); 869 } 870 871 /* ------------------------------------------------------------------ 872 Videobuf2 operations 873 ------------------------------------------------------------------*/ 874 875 static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt, 876 unsigned int *nbuffers, unsigned int *nplanes, 877 unsigned int sizes[], void *alloc_ctxs[]) 878 { 879 struct em28xx *dev = vb2_get_drv_priv(vq); 880 struct em28xx_v4l2 *v4l2 = dev->v4l2; 881 unsigned long size; 882 883 if (fmt) 884 size = fmt->fmt.pix.sizeimage; 885 else 886 size = 887 (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3; 888 889 if (size == 0) 890 return -EINVAL; 891 892 if (0 == *nbuffers) 893 *nbuffers = 32; 894 895 *nplanes = 1; 896 sizes[0] = size; 897 898 return 0; 899 } 900 901 static int 902 buffer_prepare(struct vb2_buffer *vb) 903 { 904 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue); 905 struct em28xx_v4l2 *v4l2 = dev->v4l2; 906 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); 907 unsigned long size; 908 909 em28xx_videodbg("%s, field=%d\n", __func__, vb->v4l2_buf.field); 910 911 size = (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3; 912 913 if (vb2_plane_size(vb, 0) < size) { 914 em28xx_videodbg("%s data will not fit into plane (%lu < %lu)\n", 915 __func__, vb2_plane_size(vb, 0), size); 916 return -EINVAL; 917 } 918 vb2_set_plane_payload(&buf->vb, 0, size); 919 920 return 0; 921 } 922 923 int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count) 924 { 925 struct em28xx *dev = vb2_get_drv_priv(vq); 926 struct em28xx_v4l2 *v4l2 = dev->v4l2; 927 struct v4l2_frequency f; 928 int rc = 0; 929 930 em28xx_videodbg("%s\n", __func__); 931 932 /* Make sure streaming is not already in progress for this type 933 of filehandle (e.g. video, vbi) */ 934 rc = res_get(dev, vq->type); 935 if (rc) 936 return rc; 937 938 if (v4l2->streaming_users == 0) { 939 /* First active streaming user, so allocate all the URBs */ 940 941 /* Allocate the USB bandwidth */ 942 em28xx_set_alternate(dev); 943 944 /* Needed, since GPIO might have disabled power of 945 some i2c device 946 */ 947 em28xx_wake_i2c(dev); 948 949 v4l2->capture_type = -1; 950 rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE, 951 dev->analog_xfer_bulk, 952 EM28XX_NUM_BUFS, 953 dev->max_pkt_size, 954 dev->packet_multiplier, 955 em28xx_urb_data_copy); 956 if (rc < 0) 957 return rc; 958 959 /* 960 * djh: it's not clear whether this code is still needed. I'm 961 * leaving it in here for now entirely out of concern for 962 * backward compatibility (the old code did it) 963 */ 964 965 /* Ask tuner to go to analog or radio mode */ 966 memset(&f, 0, sizeof(f)); 967 f.frequency = v4l2->frequency; 968 if (vq->owner && vq->owner->vdev->vfl_type == VFL_TYPE_RADIO) 969 f.type = V4L2_TUNER_RADIO; 970 else 971 f.type = V4L2_TUNER_ANALOG_TV; 972 v4l2_device_call_all(&v4l2->v4l2_dev, 973 0, tuner, s_frequency, &f); 974 } 975 976 v4l2->streaming_users++; 977 978 return rc; 979 } 980 981 static void em28xx_stop_streaming(struct vb2_queue *vq) 982 { 983 struct em28xx *dev = vb2_get_drv_priv(vq); 984 struct em28xx_v4l2 *v4l2 = dev->v4l2; 985 struct em28xx_dmaqueue *vidq = &dev->vidq; 986 unsigned long flags = 0; 987 988 em28xx_videodbg("%s\n", __func__); 989 990 res_free(dev, vq->type); 991 992 if (v4l2->streaming_users-- == 1) { 993 /* Last active user, so shutdown all the URBS */ 994 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); 995 } 996 997 spin_lock_irqsave(&dev->slock, flags); 998 if (dev->usb_ctl.vid_buf != NULL) { 999 vb2_buffer_done(&dev->usb_ctl.vid_buf->vb, VB2_BUF_STATE_ERROR); 1000 dev->usb_ctl.vid_buf = NULL; 1001 } 1002 while (!list_empty(&vidq->active)) { 1003 struct em28xx_buffer *buf; 1004 1005 buf = list_entry(vidq->active.next, struct em28xx_buffer, list); 1006 list_del(&buf->list); 1007 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR); 1008 } 1009 spin_unlock_irqrestore(&dev->slock, flags); 1010 } 1011 1012 void em28xx_stop_vbi_streaming(struct vb2_queue *vq) 1013 { 1014 struct em28xx *dev = vb2_get_drv_priv(vq); 1015 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1016 struct em28xx_dmaqueue *vbiq = &dev->vbiq; 1017 unsigned long flags = 0; 1018 1019 em28xx_videodbg("%s\n", __func__); 1020 1021 res_free(dev, vq->type); 1022 1023 if (v4l2->streaming_users-- == 1) { 1024 /* Last active user, so shutdown all the URBS */ 1025 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); 1026 } 1027 1028 spin_lock_irqsave(&dev->slock, flags); 1029 if (dev->usb_ctl.vbi_buf != NULL) { 1030 vb2_buffer_done(&dev->usb_ctl.vbi_buf->vb, VB2_BUF_STATE_ERROR); 1031 dev->usb_ctl.vbi_buf = NULL; 1032 } 1033 while (!list_empty(&vbiq->active)) { 1034 struct em28xx_buffer *buf; 1035 1036 buf = list_entry(vbiq->active.next, struct em28xx_buffer, list); 1037 list_del(&buf->list); 1038 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR); 1039 } 1040 spin_unlock_irqrestore(&dev->slock, flags); 1041 } 1042 1043 static void 1044 buffer_queue(struct vb2_buffer *vb) 1045 { 1046 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue); 1047 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); 1048 struct em28xx_dmaqueue *vidq = &dev->vidq; 1049 unsigned long flags = 0; 1050 1051 em28xx_videodbg("%s\n", __func__); 1052 buf->mem = vb2_plane_vaddr(vb, 0); 1053 buf->length = vb2_plane_size(vb, 0); 1054 1055 spin_lock_irqsave(&dev->slock, flags); 1056 list_add_tail(&buf->list, &vidq->active); 1057 spin_unlock_irqrestore(&dev->slock, flags); 1058 } 1059 1060 static struct vb2_ops em28xx_video_qops = { 1061 .queue_setup = queue_setup, 1062 .buf_prepare = buffer_prepare, 1063 .buf_queue = buffer_queue, 1064 .start_streaming = em28xx_start_analog_streaming, 1065 .stop_streaming = em28xx_stop_streaming, 1066 .wait_prepare = vb2_ops_wait_prepare, 1067 .wait_finish = vb2_ops_wait_finish, 1068 }; 1069 1070 static int em28xx_vb2_setup(struct em28xx *dev) 1071 { 1072 int rc; 1073 struct vb2_queue *q; 1074 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1075 1076 /* Setup Videobuf2 for Video capture */ 1077 q = &v4l2->vb_vidq; 1078 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1079 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF; 1080 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1081 q->drv_priv = dev; 1082 q->buf_struct_size = sizeof(struct em28xx_buffer); 1083 q->ops = &em28xx_video_qops; 1084 q->mem_ops = &vb2_vmalloc_memops; 1085 1086 rc = vb2_queue_init(q); 1087 if (rc < 0) 1088 return rc; 1089 1090 /* Setup Videobuf2 for VBI capture */ 1091 q = &v4l2->vb_vbiq; 1092 q->type = V4L2_BUF_TYPE_VBI_CAPTURE; 1093 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR; 1094 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1095 q->drv_priv = dev; 1096 q->buf_struct_size = sizeof(struct em28xx_buffer); 1097 q->ops = &em28xx_vbi_qops; 1098 q->mem_ops = &vb2_vmalloc_memops; 1099 1100 rc = vb2_queue_init(q); 1101 if (rc < 0) 1102 return rc; 1103 1104 return 0; 1105 } 1106 1107 /********************* v4l2 interface **************************************/ 1108 1109 static void video_mux(struct em28xx *dev, int index) 1110 { 1111 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev; 1112 1113 dev->ctl_input = index; 1114 dev->ctl_ainput = INPUT(index)->amux; 1115 dev->ctl_aoutput = INPUT(index)->aout; 1116 1117 if (!dev->ctl_aoutput) 1118 dev->ctl_aoutput = EM28XX_AOUT_MASTER; 1119 1120 v4l2_device_call_all(v4l2_dev, 0, video, s_routing, 1121 INPUT(index)->vmux, 0, 0); 1122 1123 if (dev->board.has_msp34xx) { 1124 if (dev->i2s_speed) { 1125 v4l2_device_call_all(v4l2_dev, 0, audio, 1126 s_i2s_clock_freq, dev->i2s_speed); 1127 } 1128 /* Note: this is msp3400 specific */ 1129 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing, 1130 dev->ctl_ainput, 1131 MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0); 1132 } 1133 1134 if (dev->board.adecoder != EM28XX_NOADECODER) { 1135 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing, 1136 dev->ctl_ainput, dev->ctl_aoutput, 0); 1137 } 1138 1139 em28xx_audio_analog_set(dev); 1140 } 1141 1142 static void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv) 1143 { 1144 struct em28xx *dev = priv; 1145 1146 /* 1147 * In the case of non-AC97 volume controls, we still need 1148 * to do some setups at em28xx, in order to mute/unmute 1149 * and to adjust audio volume. However, the value ranges 1150 * should be checked by the corresponding V4L subdriver. 1151 */ 1152 switch (ctrl->id) { 1153 case V4L2_CID_AUDIO_MUTE: 1154 dev->mute = ctrl->val; 1155 em28xx_audio_analog_set(dev); 1156 break; 1157 case V4L2_CID_AUDIO_VOLUME: 1158 dev->volume = ctrl->val; 1159 em28xx_audio_analog_set(dev); 1160 break; 1161 } 1162 } 1163 1164 static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl) 1165 { 1166 struct em28xx_v4l2 *v4l2 = 1167 container_of(ctrl->handler, struct em28xx_v4l2, ctrl_handler); 1168 struct em28xx *dev = v4l2->dev; 1169 int ret = -EINVAL; 1170 1171 switch (ctrl->id) { 1172 case V4L2_CID_AUDIO_MUTE: 1173 dev->mute = ctrl->val; 1174 ret = em28xx_audio_analog_set(dev); 1175 break; 1176 case V4L2_CID_AUDIO_VOLUME: 1177 dev->volume = ctrl->val; 1178 ret = em28xx_audio_analog_set(dev); 1179 break; 1180 case V4L2_CID_CONTRAST: 1181 ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val); 1182 break; 1183 case V4L2_CID_BRIGHTNESS: 1184 ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val); 1185 break; 1186 case V4L2_CID_SATURATION: 1187 ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val); 1188 break; 1189 case V4L2_CID_BLUE_BALANCE: 1190 ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val); 1191 break; 1192 case V4L2_CID_RED_BALANCE: 1193 ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val); 1194 break; 1195 case V4L2_CID_SHARPNESS: 1196 ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val); 1197 break; 1198 } 1199 1200 return (ret < 0) ? ret : 0; 1201 } 1202 1203 static const struct v4l2_ctrl_ops em28xx_ctrl_ops = { 1204 .s_ctrl = em28xx_s_ctrl, 1205 }; 1206 1207 static void size_to_scale(struct em28xx *dev, 1208 unsigned int width, unsigned int height, 1209 unsigned int *hscale, unsigned int *vscale) 1210 { 1211 unsigned int maxw = norm_maxw(dev); 1212 unsigned int maxh = norm_maxh(dev); 1213 1214 *hscale = (((unsigned long)maxw) << 12) / width - 4096L; 1215 if (*hscale > EM28XX_HVSCALE_MAX) 1216 *hscale = EM28XX_HVSCALE_MAX; 1217 1218 *vscale = (((unsigned long)maxh) << 12) / height - 4096L; 1219 if (*vscale > EM28XX_HVSCALE_MAX) 1220 *vscale = EM28XX_HVSCALE_MAX; 1221 } 1222 1223 static void scale_to_size(struct em28xx *dev, 1224 unsigned int hscale, unsigned int vscale, 1225 unsigned int *width, unsigned int *height) 1226 { 1227 unsigned int maxw = norm_maxw(dev); 1228 unsigned int maxh = norm_maxh(dev); 1229 1230 *width = (((unsigned long)maxw) << 12) / (hscale + 4096L); 1231 *height = (((unsigned long)maxh) << 12) / (vscale + 4096L); 1232 } 1233 1234 /* ------------------------------------------------------------------ 1235 IOCTL vidioc handling 1236 ------------------------------------------------------------------*/ 1237 1238 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 1239 struct v4l2_format *f) 1240 { 1241 struct em28xx *dev = video_drvdata(file); 1242 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1243 1244 f->fmt.pix.width = v4l2->width; 1245 f->fmt.pix.height = v4l2->height; 1246 f->fmt.pix.pixelformat = v4l2->format->fourcc; 1247 f->fmt.pix.bytesperline = (v4l2->width * v4l2->format->depth + 7) >> 3; 1248 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * v4l2->height; 1249 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 1250 1251 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */ 1252 if (v4l2->progressive) 1253 f->fmt.pix.field = V4L2_FIELD_NONE; 1254 else 1255 f->fmt.pix.field = v4l2->interlaced_fieldmode ? 1256 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; 1257 return 0; 1258 } 1259 1260 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc) 1261 { 1262 unsigned int i; 1263 1264 for (i = 0; i < ARRAY_SIZE(format); i++) 1265 if (format[i].fourcc == fourcc) 1266 return &format[i]; 1267 1268 return NULL; 1269 } 1270 1271 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 1272 struct v4l2_format *f) 1273 { 1274 struct em28xx *dev = video_drvdata(file); 1275 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1276 unsigned int width = f->fmt.pix.width; 1277 unsigned int height = f->fmt.pix.height; 1278 unsigned int maxw = norm_maxw(dev); 1279 unsigned int maxh = norm_maxh(dev); 1280 unsigned int hscale, vscale; 1281 struct em28xx_fmt *fmt; 1282 1283 fmt = format_by_fourcc(f->fmt.pix.pixelformat); 1284 if (!fmt) { 1285 em28xx_videodbg("Fourcc format (%08x) invalid.\n", 1286 f->fmt.pix.pixelformat); 1287 return -EINVAL; 1288 } 1289 1290 if (dev->board.is_em2800) { 1291 /* the em2800 can only scale down to 50% */ 1292 height = height > (3 * maxh / 4) ? maxh : maxh / 2; 1293 width = width > (3 * maxw / 4) ? maxw : maxw / 2; 1294 /* 1295 * MaxPacketSize for em2800 is too small to capture at full 1296 * resolution use half of maxw as the scaler can only scale 1297 * to 50% 1298 */ 1299 if (width == maxw && height == maxh) 1300 width /= 2; 1301 } else { 1302 /* width must even because of the YUYV format 1303 height must be even because of interlacing */ 1304 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh, 1305 1, 0); 1306 } 1307 1308 size_to_scale(dev, width, height, &hscale, &vscale); 1309 scale_to_size(dev, hscale, vscale, &width, &height); 1310 1311 f->fmt.pix.width = width; 1312 f->fmt.pix.height = height; 1313 f->fmt.pix.pixelformat = fmt->fourcc; 1314 f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3; 1315 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height; 1316 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 1317 if (v4l2->progressive) 1318 f->fmt.pix.field = V4L2_FIELD_NONE; 1319 else 1320 f->fmt.pix.field = v4l2->interlaced_fieldmode ? 1321 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; 1322 f->fmt.pix.priv = 0; 1323 1324 return 0; 1325 } 1326 1327 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc, 1328 unsigned width, unsigned height) 1329 { 1330 struct em28xx_fmt *fmt; 1331 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1332 1333 fmt = format_by_fourcc(fourcc); 1334 if (!fmt) 1335 return -EINVAL; 1336 1337 v4l2->format = fmt; 1338 v4l2->width = width; 1339 v4l2->height = height; 1340 1341 /* set new image size */ 1342 size_to_scale(dev, v4l2->width, v4l2->height, 1343 &v4l2->hscale, &v4l2->vscale); 1344 1345 em28xx_resolution_set(dev); 1346 1347 return 0; 1348 } 1349 1350 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 1351 struct v4l2_format *f) 1352 { 1353 struct em28xx *dev = video_drvdata(file); 1354 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1355 1356 if (vb2_is_busy(&v4l2->vb_vidq)) 1357 return -EBUSY; 1358 1359 vidioc_try_fmt_vid_cap(file, priv, f); 1360 1361 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat, 1362 f->fmt.pix.width, f->fmt.pix.height); 1363 } 1364 1365 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm) 1366 { 1367 struct em28xx *dev = video_drvdata(file); 1368 1369 *norm = dev->v4l2->norm; 1370 1371 return 0; 1372 } 1373 1374 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm) 1375 { 1376 struct em28xx *dev = video_drvdata(file); 1377 1378 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm); 1379 1380 return 0; 1381 } 1382 1383 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm) 1384 { 1385 struct em28xx *dev = video_drvdata(file); 1386 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1387 struct v4l2_format f; 1388 1389 if (norm == v4l2->norm) 1390 return 0; 1391 1392 if (v4l2->streaming_users > 0) 1393 return -EBUSY; 1394 1395 v4l2->norm = norm; 1396 1397 /* Adjusts width/height, if needed */ 1398 f.fmt.pix.width = 720; 1399 f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576; 1400 vidioc_try_fmt_vid_cap(file, priv, &f); 1401 1402 /* set new image size */ 1403 v4l2->width = f.fmt.pix.width; 1404 v4l2->height = f.fmt.pix.height; 1405 size_to_scale(dev, v4l2->width, v4l2->height, 1406 &v4l2->hscale, &v4l2->vscale); 1407 1408 em28xx_resolution_set(dev); 1409 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm); 1410 1411 return 0; 1412 } 1413 1414 static int vidioc_g_parm(struct file *file, void *priv, 1415 struct v4l2_streamparm *p) 1416 { 1417 struct em28xx *dev = video_drvdata(file); 1418 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1419 int rc = 0; 1420 1421 p->parm.capture.readbuffers = EM28XX_MIN_BUF; 1422 if (dev->board.is_webcam) 1423 rc = v4l2_device_call_until_err(&v4l2->v4l2_dev, 0, 1424 video, g_parm, p); 1425 else 1426 v4l2_video_std_frame_period(v4l2->norm, 1427 &p->parm.capture.timeperframe); 1428 1429 return rc; 1430 } 1431 1432 static int vidioc_s_parm(struct file *file, void *priv, 1433 struct v4l2_streamparm *p) 1434 { 1435 struct em28xx *dev = video_drvdata(file); 1436 1437 p->parm.capture.readbuffers = EM28XX_MIN_BUF; 1438 return v4l2_device_call_until_err(&dev->v4l2->v4l2_dev, 1439 0, video, s_parm, p); 1440 } 1441 1442 static const char *iname[] = { 1443 [EM28XX_VMUX_COMPOSITE1] = "Composite1", 1444 [EM28XX_VMUX_COMPOSITE2] = "Composite2", 1445 [EM28XX_VMUX_COMPOSITE3] = "Composite3", 1446 [EM28XX_VMUX_COMPOSITE4] = "Composite4", 1447 [EM28XX_VMUX_SVIDEO] = "S-Video", 1448 [EM28XX_VMUX_TELEVISION] = "Television", 1449 [EM28XX_VMUX_CABLE] = "Cable TV", 1450 [EM28XX_VMUX_DVB] = "DVB", 1451 [EM28XX_VMUX_DEBUG] = "for debug only", 1452 }; 1453 1454 static int vidioc_enum_input(struct file *file, void *priv, 1455 struct v4l2_input *i) 1456 { 1457 struct em28xx *dev = video_drvdata(file); 1458 unsigned int n; 1459 1460 n = i->index; 1461 if (n >= MAX_EM28XX_INPUT) 1462 return -EINVAL; 1463 if (0 == INPUT(n)->type) 1464 return -EINVAL; 1465 1466 i->index = n; 1467 i->type = V4L2_INPUT_TYPE_CAMERA; 1468 1469 strcpy(i->name, iname[INPUT(n)->type]); 1470 1471 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) || 1472 (EM28XX_VMUX_CABLE == INPUT(n)->type)) 1473 i->type = V4L2_INPUT_TYPE_TUNER; 1474 1475 i->std = dev->v4l2->vdev->tvnorms; 1476 /* webcams do not have the STD API */ 1477 if (dev->board.is_webcam) 1478 i->capabilities = 0; 1479 1480 return 0; 1481 } 1482 1483 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 1484 { 1485 struct em28xx *dev = video_drvdata(file); 1486 1487 *i = dev->ctl_input; 1488 1489 return 0; 1490 } 1491 1492 static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 1493 { 1494 struct em28xx *dev = video_drvdata(file); 1495 1496 if (i >= MAX_EM28XX_INPUT) 1497 return -EINVAL; 1498 if (0 == INPUT(i)->type) 1499 return -EINVAL; 1500 1501 video_mux(dev, i); 1502 return 0; 1503 } 1504 1505 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a) 1506 { 1507 struct em28xx *dev = video_drvdata(file); 1508 1509 switch (a->index) { 1510 case EM28XX_AMUX_VIDEO: 1511 strcpy(a->name, "Television"); 1512 break; 1513 case EM28XX_AMUX_LINE_IN: 1514 strcpy(a->name, "Line In"); 1515 break; 1516 case EM28XX_AMUX_VIDEO2: 1517 strcpy(a->name, "Television alt"); 1518 break; 1519 case EM28XX_AMUX_PHONE: 1520 strcpy(a->name, "Phone"); 1521 break; 1522 case EM28XX_AMUX_MIC: 1523 strcpy(a->name, "Mic"); 1524 break; 1525 case EM28XX_AMUX_CD: 1526 strcpy(a->name, "CD"); 1527 break; 1528 case EM28XX_AMUX_AUX: 1529 strcpy(a->name, "Aux"); 1530 break; 1531 case EM28XX_AMUX_PCM_OUT: 1532 strcpy(a->name, "PCM"); 1533 break; 1534 default: 1535 return -EINVAL; 1536 } 1537 1538 a->index = dev->ctl_ainput; 1539 a->capability = V4L2_AUDCAP_STEREO; 1540 1541 return 0; 1542 } 1543 1544 static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio *a) 1545 { 1546 struct em28xx *dev = video_drvdata(file); 1547 1548 if (a->index >= MAX_EM28XX_INPUT) 1549 return -EINVAL; 1550 if (0 == INPUT(a->index)->type) 1551 return -EINVAL; 1552 1553 dev->ctl_ainput = INPUT(a->index)->amux; 1554 dev->ctl_aoutput = INPUT(a->index)->aout; 1555 1556 if (!dev->ctl_aoutput) 1557 dev->ctl_aoutput = EM28XX_AOUT_MASTER; 1558 1559 return 0; 1560 } 1561 1562 static int vidioc_g_tuner(struct file *file, void *priv, 1563 struct v4l2_tuner *t) 1564 { 1565 struct em28xx *dev = video_drvdata(file); 1566 1567 if (0 != t->index) 1568 return -EINVAL; 1569 1570 strcpy(t->name, "Tuner"); 1571 1572 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t); 1573 return 0; 1574 } 1575 1576 static int vidioc_s_tuner(struct file *file, void *priv, 1577 const struct v4l2_tuner *t) 1578 { 1579 struct em28xx *dev = video_drvdata(file); 1580 1581 if (0 != t->index) 1582 return -EINVAL; 1583 1584 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t); 1585 return 0; 1586 } 1587 1588 static int vidioc_g_frequency(struct file *file, void *priv, 1589 struct v4l2_frequency *f) 1590 { 1591 struct em28xx *dev = video_drvdata(file); 1592 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1593 1594 if (0 != f->tuner) 1595 return -EINVAL; 1596 1597 f->frequency = v4l2->frequency; 1598 return 0; 1599 } 1600 1601 static int vidioc_s_frequency(struct file *file, void *priv, 1602 const struct v4l2_frequency *f) 1603 { 1604 struct v4l2_frequency new_freq = *f; 1605 struct em28xx *dev = video_drvdata(file); 1606 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1607 1608 if (0 != f->tuner) 1609 return -EINVAL; 1610 1611 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_frequency, f); 1612 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, g_frequency, &new_freq); 1613 v4l2->frequency = new_freq.frequency; 1614 1615 return 0; 1616 } 1617 1618 #ifdef CONFIG_VIDEO_ADV_DEBUG 1619 static int vidioc_g_chip_info(struct file *file, void *priv, 1620 struct v4l2_dbg_chip_info *chip) 1621 { 1622 struct em28xx *dev = video_drvdata(file); 1623 1624 if (chip->match.addr > 1) 1625 return -EINVAL; 1626 if (chip->match.addr == 1) 1627 strlcpy(chip->name, "ac97", sizeof(chip->name)); 1628 else 1629 strlcpy(chip->name, 1630 dev->v4l2->v4l2_dev.name, sizeof(chip->name)); 1631 return 0; 1632 } 1633 1634 static int em28xx_reg_len(int reg) 1635 { 1636 switch (reg) { 1637 case EM28XX_R40_AC97LSB: 1638 case EM28XX_R30_HSCALELOW: 1639 case EM28XX_R32_VSCALELOW: 1640 return 2; 1641 default: 1642 return 1; 1643 } 1644 } 1645 1646 static int vidioc_g_register(struct file *file, void *priv, 1647 struct v4l2_dbg_register *reg) 1648 { 1649 struct em28xx *dev = video_drvdata(file); 1650 int ret; 1651 1652 if (reg->match.addr > 1) 1653 return -EINVAL; 1654 if (reg->match.addr) { 1655 ret = em28xx_read_ac97(dev, reg->reg); 1656 if (ret < 0) 1657 return ret; 1658 1659 reg->val = ret; 1660 reg->size = 1; 1661 return 0; 1662 } 1663 1664 /* Match host */ 1665 reg->size = em28xx_reg_len(reg->reg); 1666 if (reg->size == 1) { 1667 ret = em28xx_read_reg(dev, reg->reg); 1668 1669 if (ret < 0) 1670 return ret; 1671 1672 reg->val = ret; 1673 } else { 1674 __le16 val = 0; 1675 1676 ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS, 1677 reg->reg, (char *)&val, 2); 1678 if (ret < 0) 1679 return ret; 1680 1681 reg->val = le16_to_cpu(val); 1682 } 1683 1684 return 0; 1685 } 1686 1687 static int vidioc_s_register(struct file *file, void *priv, 1688 const struct v4l2_dbg_register *reg) 1689 { 1690 struct em28xx *dev = video_drvdata(file); 1691 __le16 buf; 1692 1693 if (reg->match.addr > 1) 1694 return -EINVAL; 1695 if (reg->match.addr) 1696 return em28xx_write_ac97(dev, reg->reg, reg->val); 1697 1698 /* Match host */ 1699 buf = cpu_to_le16(reg->val); 1700 1701 return em28xx_write_regs(dev, reg->reg, (char *)&buf, 1702 em28xx_reg_len(reg->reg)); 1703 } 1704 #endif 1705 1706 static int vidioc_querycap(struct file *file, void *priv, 1707 struct v4l2_capability *cap) 1708 { 1709 struct video_device *vdev = video_devdata(file); 1710 struct em28xx *dev = video_drvdata(file); 1711 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1712 1713 strlcpy(cap->driver, "em28xx", sizeof(cap->driver)); 1714 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); 1715 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); 1716 1717 if (vdev->vfl_type == VFL_TYPE_GRABBER) 1718 cap->device_caps = V4L2_CAP_READWRITE | 1719 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; 1720 else if (vdev->vfl_type == VFL_TYPE_RADIO) 1721 cap->device_caps = V4L2_CAP_RADIO; 1722 else 1723 cap->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE; 1724 1725 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE) 1726 cap->device_caps |= V4L2_CAP_AUDIO; 1727 1728 if (dev->tuner_type != TUNER_ABSENT) 1729 cap->device_caps |= V4L2_CAP_TUNER; 1730 1731 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS | 1732 V4L2_CAP_READWRITE | V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; 1733 if (v4l2->vbi_dev) 1734 cap->capabilities |= V4L2_CAP_VBI_CAPTURE; 1735 if (v4l2->radio_dev) 1736 cap->capabilities |= V4L2_CAP_RADIO; 1737 return 0; 1738 } 1739 1740 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 1741 struct v4l2_fmtdesc *f) 1742 { 1743 if (unlikely(f->index >= ARRAY_SIZE(format))) 1744 return -EINVAL; 1745 1746 strlcpy(f->description, format[f->index].name, sizeof(f->description)); 1747 f->pixelformat = format[f->index].fourcc; 1748 1749 return 0; 1750 } 1751 1752 static int vidioc_enum_framesizes(struct file *file, void *priv, 1753 struct v4l2_frmsizeenum *fsize) 1754 { 1755 struct em28xx *dev = video_drvdata(file); 1756 struct em28xx_fmt *fmt; 1757 unsigned int maxw = norm_maxw(dev); 1758 unsigned int maxh = norm_maxh(dev); 1759 1760 fmt = format_by_fourcc(fsize->pixel_format); 1761 if (!fmt) { 1762 em28xx_videodbg("Fourcc format (%08x) invalid.\n", 1763 fsize->pixel_format); 1764 return -EINVAL; 1765 } 1766 1767 if (dev->board.is_em2800) { 1768 if (fsize->index > 1) 1769 return -EINVAL; 1770 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 1771 fsize->discrete.width = maxw / (1 + fsize->index); 1772 fsize->discrete.height = maxh / (1 + fsize->index); 1773 return 0; 1774 } 1775 1776 if (fsize->index != 0) 1777 return -EINVAL; 1778 1779 /* Report a continuous range */ 1780 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; 1781 scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX, 1782 &fsize->stepwise.min_width, &fsize->stepwise.min_height); 1783 if (fsize->stepwise.min_width < 48) 1784 fsize->stepwise.min_width = 48; 1785 if (fsize->stepwise.min_height < 38) 1786 fsize->stepwise.min_height = 38; 1787 fsize->stepwise.max_width = maxw; 1788 fsize->stepwise.max_height = maxh; 1789 fsize->stepwise.step_width = 1; 1790 fsize->stepwise.step_height = 1; 1791 return 0; 1792 } 1793 1794 /* RAW VBI ioctls */ 1795 1796 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv, 1797 struct v4l2_format *format) 1798 { 1799 struct em28xx *dev = video_drvdata(file); 1800 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1801 1802 format->fmt.vbi.samples_per_line = v4l2->vbi_width; 1803 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; 1804 format->fmt.vbi.offset = 0; 1805 format->fmt.vbi.flags = 0; 1806 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; 1807 format->fmt.vbi.count[0] = v4l2->vbi_height; 1808 format->fmt.vbi.count[1] = v4l2->vbi_height; 1809 memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved)); 1810 1811 /* Varies by video standard (NTSC, PAL, etc.) */ 1812 if (v4l2->norm & V4L2_STD_525_60) { 1813 /* NTSC */ 1814 format->fmt.vbi.start[0] = 10; 1815 format->fmt.vbi.start[1] = 273; 1816 } else if (v4l2->norm & V4L2_STD_625_50) { 1817 /* PAL */ 1818 format->fmt.vbi.start[0] = 6; 1819 format->fmt.vbi.start[1] = 318; 1820 } 1821 1822 return 0; 1823 } 1824 1825 /* ----------------------------------------------------------- */ 1826 /* RADIO ESPECIFIC IOCTLS */ 1827 /* ----------------------------------------------------------- */ 1828 1829 static int radio_g_tuner(struct file *file, void *priv, 1830 struct v4l2_tuner *t) 1831 { 1832 struct em28xx *dev = video_drvdata(file); 1833 1834 if (unlikely(t->index > 0)) 1835 return -EINVAL; 1836 1837 strcpy(t->name, "Radio"); 1838 1839 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t); 1840 1841 return 0; 1842 } 1843 1844 static int radio_s_tuner(struct file *file, void *priv, 1845 const struct v4l2_tuner *t) 1846 { 1847 struct em28xx *dev = video_drvdata(file); 1848 1849 if (0 != t->index) 1850 return -EINVAL; 1851 1852 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t); 1853 1854 return 0; 1855 } 1856 1857 /* 1858 * em28xx_free_v4l2() - Free struct em28xx_v4l2 1859 * 1860 * @ref: struct kref for struct em28xx_v4l2 1861 * 1862 * Called when all users of struct em28xx_v4l2 are gone 1863 */ 1864 static void em28xx_free_v4l2(struct kref *ref) 1865 { 1866 struct em28xx_v4l2 *v4l2 = container_of(ref, struct em28xx_v4l2, ref); 1867 1868 v4l2->dev->v4l2 = NULL; 1869 kfree(v4l2); 1870 } 1871 1872 /* 1873 * em28xx_v4l2_open() 1874 * inits the device and starts isoc transfer 1875 */ 1876 static int em28xx_v4l2_open(struct file *filp) 1877 { 1878 struct video_device *vdev = video_devdata(filp); 1879 struct em28xx *dev = video_drvdata(filp); 1880 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1881 enum v4l2_buf_type fh_type = 0; 1882 int ret; 1883 1884 switch (vdev->vfl_type) { 1885 case VFL_TYPE_GRABBER: 1886 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1887 break; 1888 case VFL_TYPE_VBI: 1889 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE; 1890 break; 1891 case VFL_TYPE_RADIO: 1892 break; 1893 default: 1894 return -EINVAL; 1895 } 1896 1897 em28xx_videodbg("open dev=%s type=%s users=%d\n", 1898 video_device_node_name(vdev), v4l2_type_names[fh_type], 1899 v4l2->users); 1900 1901 if (mutex_lock_interruptible(&dev->lock)) 1902 return -ERESTARTSYS; 1903 1904 ret = v4l2_fh_open(filp); 1905 if (ret) { 1906 em28xx_errdev("%s: v4l2_fh_open() returned error %d\n", 1907 __func__, ret); 1908 mutex_unlock(&dev->lock); 1909 return ret; 1910 } 1911 1912 if (v4l2->users == 0) { 1913 em28xx_set_mode(dev, EM28XX_ANALOG_MODE); 1914 1915 if (vdev->vfl_type != VFL_TYPE_RADIO) 1916 em28xx_resolution_set(dev); 1917 1918 /* 1919 * Needed, since GPIO might have disabled power 1920 * of some i2c devices 1921 */ 1922 em28xx_wake_i2c(dev); 1923 } 1924 1925 if (vdev->vfl_type == VFL_TYPE_RADIO) { 1926 em28xx_videodbg("video_open: setting radio device\n"); 1927 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_radio); 1928 } 1929 1930 kref_get(&dev->ref); 1931 kref_get(&v4l2->ref); 1932 v4l2->users++; 1933 1934 mutex_unlock(&dev->lock); 1935 1936 return 0; 1937 } 1938 1939 /* 1940 * em28xx_v4l2_fini() 1941 * unregisters the v4l2,i2c and usb devices 1942 * called when the device gets disconected or at module unload 1943 */ 1944 static int em28xx_v4l2_fini(struct em28xx *dev) 1945 { 1946 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1947 1948 if (dev->is_audio_only) { 1949 /* Shouldn't initialize IR for this interface */ 1950 return 0; 1951 } 1952 1953 if (!dev->has_video) { 1954 /* This device does not support the v4l2 extension */ 1955 return 0; 1956 } 1957 1958 if (v4l2 == NULL) 1959 return 0; 1960 1961 em28xx_info("Closing video extension"); 1962 1963 mutex_lock(&dev->lock); 1964 1965 v4l2_device_disconnect(&v4l2->v4l2_dev); 1966 1967 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); 1968 1969 if (v4l2->radio_dev) { 1970 em28xx_info("V4L2 device %s deregistered\n", 1971 video_device_node_name(v4l2->radio_dev)); 1972 video_unregister_device(v4l2->radio_dev); 1973 } 1974 if (v4l2->vbi_dev) { 1975 em28xx_info("V4L2 device %s deregistered\n", 1976 video_device_node_name(v4l2->vbi_dev)); 1977 video_unregister_device(v4l2->vbi_dev); 1978 } 1979 if (v4l2->vdev) { 1980 em28xx_info("V4L2 device %s deregistered\n", 1981 video_device_node_name(v4l2->vdev)); 1982 video_unregister_device(v4l2->vdev); 1983 } 1984 1985 v4l2_ctrl_handler_free(&v4l2->ctrl_handler); 1986 v4l2_device_unregister(&v4l2->v4l2_dev); 1987 1988 if (v4l2->clk) { 1989 v4l2_clk_unregister_fixed(v4l2->clk); 1990 v4l2->clk = NULL; 1991 } 1992 1993 kref_put(&v4l2->ref, em28xx_free_v4l2); 1994 1995 mutex_unlock(&dev->lock); 1996 1997 kref_put(&dev->ref, em28xx_free_device); 1998 1999 return 0; 2000 } 2001 2002 static int em28xx_v4l2_suspend(struct em28xx *dev) 2003 { 2004 if (dev->is_audio_only) 2005 return 0; 2006 2007 if (!dev->has_video) 2008 return 0; 2009 2010 em28xx_info("Suspending video extension"); 2011 em28xx_stop_urbs(dev); 2012 return 0; 2013 } 2014 2015 static int em28xx_v4l2_resume(struct em28xx *dev) 2016 { 2017 if (dev->is_audio_only) 2018 return 0; 2019 2020 if (!dev->has_video) 2021 return 0; 2022 2023 em28xx_info("Resuming video extension"); 2024 /* what do we do here */ 2025 return 0; 2026 } 2027 2028 /* 2029 * em28xx_v4l2_close() 2030 * stops streaming and deallocates all resources allocated by the v4l2 2031 * calls and ioctls 2032 */ 2033 static int em28xx_v4l2_close(struct file *filp) 2034 { 2035 struct em28xx *dev = video_drvdata(filp); 2036 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2037 int errCode; 2038 2039 em28xx_videodbg("users=%d\n", v4l2->users); 2040 2041 vb2_fop_release(filp); 2042 mutex_lock(&dev->lock); 2043 2044 if (v4l2->users == 1) { 2045 /* No sense to try to write to the device */ 2046 if (dev->disconnected) 2047 goto exit; 2048 2049 /* Save some power by putting tuner to sleep */ 2050 v4l2_device_call_all(&v4l2->v4l2_dev, 0, core, s_power, 0); 2051 2052 /* do this before setting alternate! */ 2053 em28xx_set_mode(dev, EM28XX_SUSPEND); 2054 2055 /* set alternate 0 */ 2056 dev->alt = 0; 2057 em28xx_videodbg("setting alternate 0\n"); 2058 errCode = usb_set_interface(dev->udev, 0, 0); 2059 if (errCode < 0) { 2060 em28xx_errdev("cannot change alternate number to " 2061 "0 (error=%i)\n", errCode); 2062 } 2063 } 2064 2065 exit: 2066 v4l2->users--; 2067 kref_put(&v4l2->ref, em28xx_free_v4l2); 2068 mutex_unlock(&dev->lock); 2069 kref_put(&dev->ref, em28xx_free_device); 2070 2071 return 0; 2072 } 2073 2074 static const struct v4l2_file_operations em28xx_v4l_fops = { 2075 .owner = THIS_MODULE, 2076 .open = em28xx_v4l2_open, 2077 .release = em28xx_v4l2_close, 2078 .read = vb2_fop_read, 2079 .poll = vb2_fop_poll, 2080 .mmap = vb2_fop_mmap, 2081 .unlocked_ioctl = video_ioctl2, 2082 }; 2083 2084 static const struct v4l2_ioctl_ops video_ioctl_ops = { 2085 .vidioc_querycap = vidioc_querycap, 2086 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 2087 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 2088 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 2089 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 2090 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2091 .vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2092 .vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2093 .vidioc_enum_framesizes = vidioc_enum_framesizes, 2094 .vidioc_g_audio = vidioc_g_audio, 2095 .vidioc_s_audio = vidioc_s_audio, 2096 2097 .vidioc_reqbufs = vb2_ioctl_reqbufs, 2098 .vidioc_create_bufs = vb2_ioctl_create_bufs, 2099 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 2100 .vidioc_querybuf = vb2_ioctl_querybuf, 2101 .vidioc_qbuf = vb2_ioctl_qbuf, 2102 .vidioc_dqbuf = vb2_ioctl_dqbuf, 2103 2104 .vidioc_g_std = vidioc_g_std, 2105 .vidioc_querystd = vidioc_querystd, 2106 .vidioc_s_std = vidioc_s_std, 2107 .vidioc_g_parm = vidioc_g_parm, 2108 .vidioc_s_parm = vidioc_s_parm, 2109 .vidioc_enum_input = vidioc_enum_input, 2110 .vidioc_g_input = vidioc_g_input, 2111 .vidioc_s_input = vidioc_s_input, 2112 .vidioc_streamon = vb2_ioctl_streamon, 2113 .vidioc_streamoff = vb2_ioctl_streamoff, 2114 .vidioc_g_tuner = vidioc_g_tuner, 2115 .vidioc_s_tuner = vidioc_s_tuner, 2116 .vidioc_g_frequency = vidioc_g_frequency, 2117 .vidioc_s_frequency = vidioc_s_frequency, 2118 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 2119 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 2120 #ifdef CONFIG_VIDEO_ADV_DEBUG 2121 .vidioc_g_chip_info = vidioc_g_chip_info, 2122 .vidioc_g_register = vidioc_g_register, 2123 .vidioc_s_register = vidioc_s_register, 2124 #endif 2125 }; 2126 2127 static const struct video_device em28xx_video_template = { 2128 .fops = &em28xx_v4l_fops, 2129 .ioctl_ops = &video_ioctl_ops, 2130 .release = video_device_release, 2131 .tvnorms = V4L2_STD_ALL, 2132 }; 2133 2134 static const struct v4l2_file_operations radio_fops = { 2135 .owner = THIS_MODULE, 2136 .open = em28xx_v4l2_open, 2137 .release = em28xx_v4l2_close, 2138 .unlocked_ioctl = video_ioctl2, 2139 }; 2140 2141 static const struct v4l2_ioctl_ops radio_ioctl_ops = { 2142 .vidioc_querycap = vidioc_querycap, 2143 .vidioc_g_tuner = radio_g_tuner, 2144 .vidioc_s_tuner = radio_s_tuner, 2145 .vidioc_g_frequency = vidioc_g_frequency, 2146 .vidioc_s_frequency = vidioc_s_frequency, 2147 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 2148 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 2149 #ifdef CONFIG_VIDEO_ADV_DEBUG 2150 .vidioc_g_chip_info = vidioc_g_chip_info, 2151 .vidioc_g_register = vidioc_g_register, 2152 .vidioc_s_register = vidioc_s_register, 2153 #endif 2154 }; 2155 2156 static struct video_device em28xx_radio_template = { 2157 .fops = &radio_fops, 2158 .ioctl_ops = &radio_ioctl_ops, 2159 .release = video_device_release, 2160 }; 2161 2162 /* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */ 2163 static unsigned short saa711x_addrs[] = { 2164 0x4a >> 1, 0x48 >> 1, /* SAA7111, SAA7111A and SAA7113 */ 2165 0x42 >> 1, 0x40 >> 1, /* SAA7114, SAA7115 and SAA7118 */ 2166 I2C_CLIENT_END }; 2167 2168 static unsigned short tvp5150_addrs[] = { 2169 0xb8 >> 1, 2170 0xba >> 1, 2171 I2C_CLIENT_END 2172 }; 2173 2174 static unsigned short msp3400_addrs[] = { 2175 0x80 >> 1, 2176 0x88 >> 1, 2177 I2C_CLIENT_END 2178 }; 2179 2180 /******************************** usb interface ******************************/ 2181 2182 static struct video_device 2183 *em28xx_vdev_init(struct em28xx *dev, 2184 const struct video_device *template, 2185 const char *type_name) 2186 { 2187 struct video_device *vfd; 2188 2189 vfd = video_device_alloc(); 2190 if (NULL == vfd) 2191 return NULL; 2192 2193 *vfd = *template; 2194 vfd->v4l2_dev = &dev->v4l2->v4l2_dev; 2195 vfd->debug = video_debug; 2196 vfd->lock = &dev->lock; 2197 if (dev->board.is_webcam) 2198 vfd->tvnorms = 0; 2199 2200 snprintf(vfd->name, sizeof(vfd->name), "%s %s", 2201 dev->name, type_name); 2202 2203 video_set_drvdata(vfd, dev); 2204 return vfd; 2205 } 2206 2207 static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr) 2208 { 2209 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2210 struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev; 2211 struct tuner_setup tun_setup; 2212 struct v4l2_frequency f; 2213 2214 memset(&tun_setup, 0, sizeof(tun_setup)); 2215 2216 tun_setup.mode_mask = T_ANALOG_TV | T_RADIO; 2217 tun_setup.tuner_callback = em28xx_tuner_callback; 2218 2219 if (dev->board.radio.type) { 2220 tun_setup.type = dev->board.radio.type; 2221 tun_setup.addr = dev->board.radio_addr; 2222 2223 v4l2_device_call_all(v4l2_dev, 2224 0, tuner, s_type_addr, &tun_setup); 2225 } 2226 2227 if ((dev->tuner_type != TUNER_ABSENT) && (dev->tuner_type)) { 2228 tun_setup.type = dev->tuner_type; 2229 tun_setup.addr = tuner_addr; 2230 2231 v4l2_device_call_all(v4l2_dev, 2232 0, tuner, s_type_addr, &tun_setup); 2233 } 2234 2235 if (dev->board.tda9887_conf) { 2236 struct v4l2_priv_tun_config tda9887_cfg; 2237 2238 tda9887_cfg.tuner = TUNER_TDA9887; 2239 tda9887_cfg.priv = &dev->board.tda9887_conf; 2240 2241 v4l2_device_call_all(v4l2_dev, 2242 0, tuner, s_config, &tda9887_cfg); 2243 } 2244 2245 if (dev->tuner_type == TUNER_XC2028) { 2246 struct v4l2_priv_tun_config xc2028_cfg; 2247 struct xc2028_ctrl ctl; 2248 2249 memset(&xc2028_cfg, 0, sizeof(xc2028_cfg)); 2250 memset(&ctl, 0, sizeof(ctl)); 2251 2252 em28xx_setup_xc3028(dev, &ctl); 2253 2254 xc2028_cfg.tuner = TUNER_XC2028; 2255 xc2028_cfg.priv = &ctl; 2256 2257 v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg); 2258 } 2259 2260 /* configure tuner */ 2261 f.tuner = 0; 2262 f.type = V4L2_TUNER_ANALOG_TV; 2263 f.frequency = 9076; /* just a magic number */ 2264 v4l2->frequency = f.frequency; 2265 v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency, &f); 2266 } 2267 2268 static int em28xx_v4l2_init(struct em28xx *dev) 2269 { 2270 u8 val; 2271 int ret; 2272 unsigned int maxw; 2273 struct v4l2_ctrl_handler *hdl; 2274 struct em28xx_v4l2 *v4l2; 2275 2276 if (dev->is_audio_only) { 2277 /* Shouldn't initialize IR for this interface */ 2278 return 0; 2279 } 2280 2281 if (!dev->has_video) { 2282 /* This device does not support the v4l2 extension */ 2283 return 0; 2284 } 2285 2286 em28xx_info("Registering V4L2 extension\n"); 2287 2288 mutex_lock(&dev->lock); 2289 2290 v4l2 = kzalloc(sizeof(struct em28xx_v4l2), GFP_KERNEL); 2291 if (v4l2 == NULL) { 2292 em28xx_info("em28xx_v4l: memory allocation failed\n"); 2293 mutex_unlock(&dev->lock); 2294 return -ENOMEM; 2295 } 2296 kref_init(&v4l2->ref); 2297 v4l2->dev = dev; 2298 dev->v4l2 = v4l2; 2299 2300 ret = v4l2_device_register(&dev->udev->dev, &v4l2->v4l2_dev); 2301 if (ret < 0) { 2302 em28xx_errdev("Call to v4l2_device_register() failed!\n"); 2303 goto err; 2304 } 2305 2306 hdl = &v4l2->ctrl_handler; 2307 v4l2_ctrl_handler_init(hdl, 8); 2308 v4l2->v4l2_dev.ctrl_handler = hdl; 2309 2310 if (dev->board.is_webcam) 2311 v4l2->progressive = true; 2312 2313 /* 2314 * Default format, used for tvp5150 or saa711x output formats 2315 */ 2316 v4l2->vinmode = 0x10; 2317 v4l2->vinctl = EM28XX_VINCTRL_INTERLACED | 2318 EM28XX_VINCTRL_CCIR656_ENABLE; 2319 2320 /* request some modules */ 2321 2322 if (dev->board.has_msp34xx) 2323 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2324 &dev->i2c_adap[dev->def_i2c_bus], 2325 "msp3400", 0, msp3400_addrs); 2326 2327 if (dev->board.decoder == EM28XX_SAA711X) 2328 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2329 &dev->i2c_adap[dev->def_i2c_bus], 2330 "saa7115_auto", 0, saa711x_addrs); 2331 2332 if (dev->board.decoder == EM28XX_TVP5150) 2333 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2334 &dev->i2c_adap[dev->def_i2c_bus], 2335 "tvp5150", 0, tvp5150_addrs); 2336 2337 if (dev->board.adecoder == EM28XX_TVAUDIO) 2338 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2339 &dev->i2c_adap[dev->def_i2c_bus], 2340 "tvaudio", dev->board.tvaudio_addr, NULL); 2341 2342 /* Initialize tuner and camera */ 2343 2344 if (dev->board.tuner_type != TUNER_ABSENT) { 2345 unsigned short tuner_addr = dev->board.tuner_addr; 2346 int has_demod = (dev->board.tda9887_conf & TDA9887_PRESENT); 2347 2348 if (dev->board.radio.type) 2349 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2350 &dev->i2c_adap[dev->def_i2c_bus], 2351 "tuner", dev->board.radio_addr, 2352 NULL); 2353 2354 if (has_demod) 2355 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2356 &dev->i2c_adap[dev->def_i2c_bus], 2357 "tuner", 0, 2358 v4l2_i2c_tuner_addrs(ADDRS_DEMOD)); 2359 if (tuner_addr == 0) { 2360 enum v4l2_i2c_tuner_type type = 2361 has_demod ? ADDRS_TV_WITH_DEMOD : ADDRS_TV; 2362 struct v4l2_subdev *sd; 2363 2364 sd = v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2365 &dev->i2c_adap[dev->def_i2c_bus], 2366 "tuner", 0, 2367 v4l2_i2c_tuner_addrs(type)); 2368 2369 if (sd) 2370 tuner_addr = v4l2_i2c_subdev_addr(sd); 2371 } else { 2372 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2373 &dev->i2c_adap[dev->def_i2c_bus], 2374 "tuner", tuner_addr, NULL); 2375 } 2376 2377 em28xx_tuner_setup(dev, tuner_addr); 2378 } 2379 2380 if (dev->em28xx_sensor != EM28XX_NOSENSOR) 2381 em28xx_init_camera(dev); 2382 2383 /* Configure audio */ 2384 ret = em28xx_audio_setup(dev); 2385 if (ret < 0) { 2386 em28xx_errdev("%s: Error while setting audio - error [%d]!\n", 2387 __func__, ret); 2388 goto unregister_dev; 2389 } 2390 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) { 2391 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2392 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); 2393 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2394 V4L2_CID_AUDIO_VOLUME, 0, 0x1f, 1, 0x1f); 2395 } else { 2396 /* install the em28xx notify callback */ 2397 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_MUTE), 2398 em28xx_ctrl_notify, dev); 2399 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_VOLUME), 2400 em28xx_ctrl_notify, dev); 2401 } 2402 2403 /* wake i2c devices */ 2404 em28xx_wake_i2c(dev); 2405 2406 /* init video dma queues */ 2407 INIT_LIST_HEAD(&dev->vidq.active); 2408 INIT_LIST_HEAD(&dev->vbiq.active); 2409 2410 if (dev->board.has_msp34xx) { 2411 /* Send a reset to other chips via gpio */ 2412 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xf7); 2413 if (ret < 0) { 2414 em28xx_errdev("%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n", 2415 __func__, ret); 2416 goto unregister_dev; 2417 } 2418 msleep(3); 2419 2420 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xff); 2421 if (ret < 0) { 2422 em28xx_errdev("%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n", 2423 __func__, ret); 2424 goto unregister_dev; 2425 } 2426 msleep(3); 2427 } 2428 2429 /* set default norm */ 2430 v4l2->norm = V4L2_STD_PAL; 2431 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm); 2432 v4l2->interlaced_fieldmode = EM28XX_INTERLACED_DEFAULT; 2433 2434 /* Analog specific initialization */ 2435 v4l2->format = &format[0]; 2436 2437 maxw = norm_maxw(dev); 2438 /* MaxPacketSize for em2800 is too small to capture at full resolution 2439 * use half of maxw as the scaler can only scale to 50% */ 2440 if (dev->board.is_em2800) 2441 maxw /= 2; 2442 2443 em28xx_set_video_format(dev, format[0].fourcc, 2444 maxw, norm_maxh(dev)); 2445 2446 video_mux(dev, 0); 2447 2448 /* Audio defaults */ 2449 dev->mute = 1; 2450 dev->volume = 0x1f; 2451 2452 /* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */ 2453 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK); 2454 em28xx_write_reg(dev, EM28XX_R0F_XCLK, 2455 (EM28XX_XCLK_AUDIO_UNMUTE | val)); 2456 2457 em28xx_set_outfmt(dev); 2458 2459 /* Add image controls */ 2460 /* NOTE: at this point, the subdevices are already registered, so bridge 2461 * controls are only added/enabled when no subdevice provides them */ 2462 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST)) 2463 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2464 V4L2_CID_CONTRAST, 2465 0, 0x1f, 1, CONTRAST_DEFAULT); 2466 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_BRIGHTNESS)) 2467 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2468 V4L2_CID_BRIGHTNESS, 2469 -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT); 2470 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_SATURATION)) 2471 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2472 V4L2_CID_SATURATION, 2473 0, 0x1f, 1, SATURATION_DEFAULT); 2474 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_BLUE_BALANCE)) 2475 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2476 V4L2_CID_BLUE_BALANCE, 2477 -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT); 2478 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_RED_BALANCE)) 2479 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2480 V4L2_CID_RED_BALANCE, 2481 -0x30, 0x30, 1, RED_BALANCE_DEFAULT); 2482 if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_SHARPNESS)) 2483 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2484 V4L2_CID_SHARPNESS, 2485 0, 0x0f, 1, SHARPNESS_DEFAULT); 2486 2487 /* Reset image controls */ 2488 em28xx_colorlevels_set_default(dev); 2489 v4l2_ctrl_handler_setup(hdl); 2490 ret = hdl->error; 2491 if (ret) 2492 goto unregister_dev; 2493 2494 /* allocate and fill video video_device struct */ 2495 v4l2->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video"); 2496 if (!v4l2->vdev) { 2497 em28xx_errdev("cannot allocate video_device.\n"); 2498 ret = -ENODEV; 2499 goto unregister_dev; 2500 } 2501 mutex_init(&v4l2->vb_queue_lock); 2502 mutex_init(&v4l2->vb_vbi_queue_lock); 2503 v4l2->vdev->queue = &v4l2->vb_vidq; 2504 v4l2->vdev->queue->lock = &v4l2->vb_queue_lock; 2505 2506 /* disable inapplicable ioctls */ 2507 if (dev->board.is_webcam) { 2508 v4l2_disable_ioctl(v4l2->vdev, VIDIOC_QUERYSTD); 2509 v4l2_disable_ioctl(v4l2->vdev, VIDIOC_G_STD); 2510 v4l2_disable_ioctl(v4l2->vdev, VIDIOC_S_STD); 2511 } else { 2512 v4l2_disable_ioctl(v4l2->vdev, VIDIOC_S_PARM); 2513 } 2514 if (dev->tuner_type == TUNER_ABSENT) { 2515 v4l2_disable_ioctl(v4l2->vdev, VIDIOC_G_TUNER); 2516 v4l2_disable_ioctl(v4l2->vdev, VIDIOC_S_TUNER); 2517 v4l2_disable_ioctl(v4l2->vdev, VIDIOC_G_FREQUENCY); 2518 v4l2_disable_ioctl(v4l2->vdev, VIDIOC_S_FREQUENCY); 2519 } 2520 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) { 2521 v4l2_disable_ioctl(v4l2->vdev, VIDIOC_G_AUDIO); 2522 v4l2_disable_ioctl(v4l2->vdev, VIDIOC_S_AUDIO); 2523 } 2524 2525 /* register v4l2 video video_device */ 2526 ret = video_register_device(v4l2->vdev, VFL_TYPE_GRABBER, 2527 video_nr[dev->devno]); 2528 if (ret) { 2529 em28xx_errdev("unable to register video device (error=%i).\n", 2530 ret); 2531 goto unregister_dev; 2532 } 2533 2534 /* Allocate and fill vbi video_device struct */ 2535 if (em28xx_vbi_supported(dev) == 1) { 2536 v4l2->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template, 2537 "vbi"); 2538 2539 v4l2->vbi_dev->queue = &v4l2->vb_vbiq; 2540 v4l2->vbi_dev->queue->lock = &v4l2->vb_vbi_queue_lock; 2541 2542 /* disable inapplicable ioctls */ 2543 v4l2_disable_ioctl(v4l2->vbi_dev, VIDIOC_S_PARM); 2544 if (dev->tuner_type == TUNER_ABSENT) { 2545 v4l2_disable_ioctl(v4l2->vbi_dev, VIDIOC_G_TUNER); 2546 v4l2_disable_ioctl(v4l2->vbi_dev, VIDIOC_S_TUNER); 2547 v4l2_disable_ioctl(v4l2->vbi_dev, VIDIOC_G_FREQUENCY); 2548 v4l2_disable_ioctl(v4l2->vbi_dev, VIDIOC_S_FREQUENCY); 2549 } 2550 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) { 2551 v4l2_disable_ioctl(v4l2->vbi_dev, VIDIOC_G_AUDIO); 2552 v4l2_disable_ioctl(v4l2->vbi_dev, VIDIOC_S_AUDIO); 2553 } 2554 2555 /* register v4l2 vbi video_device */ 2556 ret = video_register_device(v4l2->vbi_dev, VFL_TYPE_VBI, 2557 vbi_nr[dev->devno]); 2558 if (ret < 0) { 2559 em28xx_errdev("unable to register vbi device\n"); 2560 goto unregister_dev; 2561 } 2562 } 2563 2564 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) { 2565 v4l2->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template, 2566 "radio"); 2567 if (!v4l2->radio_dev) { 2568 em28xx_errdev("cannot allocate video_device.\n"); 2569 ret = -ENODEV; 2570 goto unregister_dev; 2571 } 2572 ret = video_register_device(v4l2->radio_dev, VFL_TYPE_RADIO, 2573 radio_nr[dev->devno]); 2574 if (ret < 0) { 2575 em28xx_errdev("can't register radio device\n"); 2576 goto unregister_dev; 2577 } 2578 em28xx_info("Registered radio device as %s\n", 2579 video_device_node_name(v4l2->radio_dev)); 2580 } 2581 2582 em28xx_info("V4L2 video device registered as %s\n", 2583 video_device_node_name(v4l2->vdev)); 2584 2585 if (v4l2->vbi_dev) 2586 em28xx_info("V4L2 VBI device registered as %s\n", 2587 video_device_node_name(v4l2->vbi_dev)); 2588 2589 /* Save some power by putting tuner to sleep */ 2590 v4l2_device_call_all(&v4l2->v4l2_dev, 0, core, s_power, 0); 2591 2592 /* initialize videobuf2 stuff */ 2593 em28xx_vb2_setup(dev); 2594 2595 em28xx_info("V4L2 extension successfully initialized\n"); 2596 2597 kref_get(&dev->ref); 2598 2599 mutex_unlock(&dev->lock); 2600 return 0; 2601 2602 unregister_dev: 2603 v4l2_ctrl_handler_free(&v4l2->ctrl_handler); 2604 v4l2_device_unregister(&v4l2->v4l2_dev); 2605 err: 2606 dev->v4l2 = NULL; 2607 kref_put(&v4l2->ref, em28xx_free_v4l2); 2608 mutex_unlock(&dev->lock); 2609 return ret; 2610 } 2611 2612 static struct em28xx_ops v4l2_ops = { 2613 .id = EM28XX_V4L2, 2614 .name = "Em28xx v4l2 Extension", 2615 .init = em28xx_v4l2_init, 2616 .fini = em28xx_v4l2_fini, 2617 .suspend = em28xx_v4l2_suspend, 2618 .resume = em28xx_v4l2_resume, 2619 }; 2620 2621 static int __init em28xx_video_register(void) 2622 { 2623 return em28xx_register_extension(&v4l2_ops); 2624 } 2625 2626 static void __exit em28xx_video_unregister(void) 2627 { 2628 em28xx_unregister_extension(&v4l2_ops); 2629 } 2630 2631 module_init(em28xx_video_register); 2632 module_exit(em28xx_video_unregister); 2633