1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB 4 // video capture devices 5 // 6 // Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> 7 // Markus Rechberger <mrechberger@gmail.com> 8 // Mauro Carvalho Chehab <mchehab@kernel.org> 9 // Sascha Sommer <saschasommer@freenet.de> 10 // Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com> 11 // 12 // Some parts based on SN9C10x PC Camera Controllers GPL driver made 13 // by Luca Risolia <luca.risolia@studio.unibo.it> 14 // 15 // This program is free software; you can redistribute it and/or modify 16 // it under the terms of the GNU General Public License as published by 17 // the Free Software Foundation; either version 2 of the License, or 18 // (at your option) any later version. 19 // 20 // This program is distributed in the hope that it will be useful, 21 // but WITHOUT ANY WARRANTY; without even the implied warranty of 22 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 // GNU General Public License for more details. 24 25 #include "em28xx.h" 26 27 #include <linux/init.h> 28 #include <linux/list.h> 29 #include <linux/module.h> 30 #include <linux/kernel.h> 31 #include <linux/bitmap.h> 32 #include <linux/usb.h> 33 #include <linux/i2c.h> 34 #include <linux/mm.h> 35 #include <linux/mutex.h> 36 #include <linux/slab.h> 37 38 #include "em28xx-v4l.h" 39 #include <media/v4l2-common.h> 40 #include <media/v4l2-ioctl.h> 41 #include <media/v4l2-event.h> 42 #include <media/drv-intf/msp3400.h> 43 #include <media/tuner.h> 44 45 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \ 46 "Markus Rechberger <mrechberger@gmail.com>, " \ 47 "Mauro Carvalho Chehab <mchehab@kernel.org>, " \ 48 "Sascha Sommer <saschasommer@freenet.de>" 49 50 static unsigned int isoc_debug; 51 module_param(isoc_debug, int, 0644); 52 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]"); 53 54 static unsigned int disable_vbi; 55 module_param(disable_vbi, int, 0644); 56 MODULE_PARM_DESC(disable_vbi, "disable vbi support"); 57 58 static int alt; 59 module_param(alt, int, 0644); 60 MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint"); 61 62 #define em28xx_videodbg(fmt, arg...) do { \ 63 if (video_debug) \ 64 dev_printk(KERN_DEBUG, &dev->intf->dev, \ 65 "video: %s: " fmt, __func__, ## arg); \ 66 } while (0) 67 68 #define em28xx_isocdbg(fmt, arg...) do {\ 69 if (isoc_debug) \ 70 dev_printk(KERN_DEBUG, &dev->intf->dev, \ 71 "isoc: %s: " fmt, __func__, ## arg); \ 72 } while (0) 73 74 MODULE_AUTHOR(DRIVER_AUTHOR); 75 MODULE_DESCRIPTION(DRIVER_DESC " - v4l2 interface"); 76 MODULE_LICENSE("GPL v2"); 77 MODULE_VERSION(EM28XX_VERSION); 78 79 #define EM25XX_FRMDATAHDR_BYTE1 0x02 80 #define EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE 0x20 81 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_END 0x02 82 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_ID 0x01 83 #define EM25XX_FRMDATAHDR_BYTE2_MASK (EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE | \ 84 EM25XX_FRMDATAHDR_BYTE2_FRAME_END | \ 85 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID) 86 87 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; 88 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; 89 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; 90 91 module_param_array(video_nr, int, NULL, 0444); 92 module_param_array(vbi_nr, int, NULL, 0444); 93 module_param_array(radio_nr, int, NULL, 0444); 94 MODULE_PARM_DESC(video_nr, "video device numbers"); 95 MODULE_PARM_DESC(vbi_nr, "vbi device numbers"); 96 MODULE_PARM_DESC(radio_nr, "radio device numbers"); 97 98 static unsigned int video_debug; 99 module_param(video_debug, int, 0644); 100 MODULE_PARM_DESC(video_debug, "enable debug messages [video]"); 101 102 /* supported video standards */ 103 static struct em28xx_fmt format[] = { 104 { 105 .fourcc = V4L2_PIX_FMT_YUYV, 106 .depth = 16, 107 .reg = EM28XX_OUTFMT_YUV422_Y0UY1V, 108 }, { 109 .fourcc = V4L2_PIX_FMT_RGB565, 110 .depth = 16, 111 .reg = EM28XX_OUTFMT_RGB_16_656, 112 }, { 113 .fourcc = V4L2_PIX_FMT_SRGGB8, 114 .depth = 8, 115 .reg = EM28XX_OUTFMT_RGB_8_RGRG, 116 }, { 117 .fourcc = V4L2_PIX_FMT_SBGGR8, 118 .depth = 8, 119 .reg = EM28XX_OUTFMT_RGB_8_BGBG, 120 }, { 121 .fourcc = V4L2_PIX_FMT_SGRBG8, 122 .depth = 8, 123 .reg = EM28XX_OUTFMT_RGB_8_GRGR, 124 }, { 125 .fourcc = V4L2_PIX_FMT_SGBRG8, 126 .depth = 8, 127 .reg = EM28XX_OUTFMT_RGB_8_GBGB, 128 }, { 129 .fourcc = V4L2_PIX_FMT_YUV411P, 130 .depth = 12, 131 .reg = EM28XX_OUTFMT_YUV411, 132 }, 133 }; 134 135 /*FIXME: maxw should be dependent of alt mode */ 136 static inline unsigned int norm_maxw(struct em28xx *dev) 137 { 138 struct em28xx_v4l2 *v4l2 = dev->v4l2; 139 140 if (dev->is_webcam) 141 return v4l2->sensor_xres; 142 143 if (dev->board.max_range_640_480) 144 return 640; 145 146 return 720; 147 } 148 149 static inline unsigned int norm_maxh(struct em28xx *dev) 150 { 151 struct em28xx_v4l2 *v4l2 = dev->v4l2; 152 153 if (dev->is_webcam) 154 return v4l2->sensor_yres; 155 156 if (dev->board.max_range_640_480) 157 return 480; 158 159 return (v4l2->norm & V4L2_STD_625_50) ? 576 : 480; 160 } 161 162 static int em28xx_vbi_supported(struct em28xx *dev) 163 { 164 /* Modprobe option to manually disable */ 165 if (disable_vbi == 1) 166 return 0; 167 168 if (dev->is_webcam) 169 return 0; 170 171 /* FIXME: check subdevices for VBI support */ 172 173 if (dev->chip_id == CHIP_ID_EM2860 || 174 dev->chip_id == CHIP_ID_EM2883) 175 return 1; 176 177 /* Version of em28xx that does not support VBI */ 178 return 0; 179 } 180 181 /* 182 * em28xx_wake_i2c() 183 * configure i2c attached devices 184 */ 185 static void em28xx_wake_i2c(struct em28xx *dev) 186 { 187 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev; 188 189 v4l2_device_call_all(v4l2_dev, 0, core, reset, 0); 190 v4l2_device_call_all(v4l2_dev, 0, video, s_routing, 191 INPUT(dev->ctl_input)->vmux, 0, 0); 192 } 193 194 static int em28xx_colorlevels_set_default(struct em28xx *dev) 195 { 196 em28xx_write_reg(dev, EM28XX_R20_YGAIN, CONTRAST_DEFAULT); 197 em28xx_write_reg(dev, EM28XX_R21_YOFFSET, BRIGHTNESS_DEFAULT); 198 em28xx_write_reg(dev, EM28XX_R22_UVGAIN, SATURATION_DEFAULT); 199 em28xx_write_reg(dev, EM28XX_R23_UOFFSET, BLUE_BALANCE_DEFAULT); 200 em28xx_write_reg(dev, EM28XX_R24_VOFFSET, RED_BALANCE_DEFAULT); 201 em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, SHARPNESS_DEFAULT); 202 203 em28xx_write_reg(dev, EM28XX_R14_GAMMA, 0x20); 204 em28xx_write_reg(dev, EM28XX_R15_RGAIN, 0x20); 205 em28xx_write_reg(dev, EM28XX_R16_GGAIN, 0x20); 206 em28xx_write_reg(dev, EM28XX_R17_BGAIN, 0x20); 207 em28xx_write_reg(dev, EM28XX_R18_ROFFSET, 0x00); 208 em28xx_write_reg(dev, EM28XX_R19_GOFFSET, 0x00); 209 return em28xx_write_reg(dev, EM28XX_R1A_BOFFSET, 0x00); 210 } 211 212 static int em28xx_set_outfmt(struct em28xx *dev) 213 { 214 int ret; 215 u8 fmt, vinctrl; 216 struct em28xx_v4l2 *v4l2 = dev->v4l2; 217 218 fmt = v4l2->format->reg; 219 if (!dev->is_em25xx) 220 fmt |= 0x20; 221 /* 222 * NOTE: it's not clear if this is really needed ! 223 * The datasheets say bit 5 is a reserved bit and devices seem to work 224 * fine without it. But the Windows driver sets it for em2710/50+em28xx 225 * devices and we've always been setting it, too. 226 * 227 * em2765 (em25xx, em276x/7x/8x) devices do NOT work with this bit set, 228 * it's likely used for an additional (compressed ?) format there. 229 */ 230 ret = em28xx_write_reg(dev, EM28XX_R27_OUTFMT, fmt); 231 if (ret < 0) 232 return ret; 233 234 ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, v4l2->vinmode); 235 if (ret < 0) 236 return ret; 237 238 vinctrl = v4l2->vinctl; 239 if (em28xx_vbi_supported(dev) == 1) { 240 vinctrl |= EM28XX_VINCTRL_VBI_RAW; 241 em28xx_write_reg(dev, EM28XX_R34_VBI_START_H, 0x00); 242 em28xx_write_reg(dev, EM28XX_R36_VBI_WIDTH, 243 v4l2->vbi_width / 4); 244 em28xx_write_reg(dev, EM28XX_R37_VBI_HEIGHT, v4l2->vbi_height); 245 if (v4l2->norm & V4L2_STD_525_60) { 246 /* NTSC */ 247 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x09); 248 } else if (v4l2->norm & V4L2_STD_625_50) { 249 /* PAL */ 250 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x07); 251 } 252 } 253 254 return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, vinctrl); 255 } 256 257 static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax, 258 u8 ymin, u8 ymax) 259 { 260 em28xx_videodbg("em28xx Scale: (%d,%d)-(%d,%d)\n", 261 xmin, ymin, xmax, ymax); 262 263 em28xx_write_regs(dev, EM28XX_R28_XMIN, &xmin, 1); 264 em28xx_write_regs(dev, EM28XX_R29_XMAX, &xmax, 1); 265 em28xx_write_regs(dev, EM28XX_R2A_YMIN, &ymin, 1); 266 return em28xx_write_regs(dev, EM28XX_R2B_YMAX, &ymax, 1); 267 } 268 269 static void em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart, 270 u16 width, u16 height) 271 { 272 u8 cwidth = width >> 2; 273 u8 cheight = height >> 2; 274 u8 overflow = (height >> 9 & 0x02) | (width >> 10 & 0x01); 275 /* NOTE: size limit: 2047x1023 = 2MPix */ 276 277 em28xx_videodbg("capture area set to (%d,%d): %dx%d\n", 278 hstart, vstart, 279 ((overflow & 2) << 9 | cwidth << 2), 280 ((overflow & 1) << 10 | cheight << 2)); 281 282 em28xx_write_regs(dev, EM28XX_R1C_HSTART, &hstart, 1); 283 em28xx_write_regs(dev, EM28XX_R1D_VSTART, &vstart, 1); 284 em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, &cwidth, 1); 285 em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, &cheight, 1); 286 em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1); 287 288 /* FIXME: function/meaning of these registers ? */ 289 /* FIXME: align width+height to multiples of 4 ?! */ 290 if (dev->is_em25xx) { 291 em28xx_write_reg(dev, 0x34, width >> 4); 292 em28xx_write_reg(dev, 0x35, height >> 4); 293 } 294 } 295 296 static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v) 297 { 298 u8 mode = 0x00; 299 /* the em2800 scaler only supports scaling down to 50% */ 300 301 if (dev->board.is_em2800) { 302 mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00); 303 } else { 304 u8 buf[2]; 305 306 buf[0] = h; 307 buf[1] = h >> 8; 308 em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2); 309 310 buf[0] = v; 311 buf[1] = v >> 8; 312 em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2); 313 /* 314 * it seems that both H and V scalers must be active 315 * to work correctly 316 */ 317 mode = (h || v) ? 0x30 : 0x00; 318 } 319 return em28xx_write_reg(dev, EM28XX_R26_COMPR, mode); 320 } 321 322 /* FIXME: this only function read values from dev */ 323 static int em28xx_resolution_set(struct em28xx *dev) 324 { 325 struct em28xx_v4l2 *v4l2 = dev->v4l2; 326 int width = norm_maxw(dev); 327 int height = norm_maxh(dev); 328 329 /* Properly setup VBI */ 330 v4l2->vbi_width = 720; 331 if (v4l2->norm & V4L2_STD_525_60) 332 v4l2->vbi_height = 12; 333 else 334 v4l2->vbi_height = 18; 335 336 em28xx_set_outfmt(dev); 337 338 em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2); 339 340 /* 341 * If we don't set the start position to 2 in VBI mode, we end up 342 * with line 20/21 being YUYV encoded instead of being in 8-bit 343 * greyscale. The core of the issue is that line 21 (and line 23 for 344 * PAL WSS) are inside of active video region, and as a result they 345 * get the pixelformatting associated with that area. So by cropping 346 * it out, we end up with the same format as the rest of the VBI 347 * region 348 */ 349 if (em28xx_vbi_supported(dev) == 1) 350 em28xx_capture_area_set(dev, 0, 2, width, height); 351 else 352 em28xx_capture_area_set(dev, 0, 0, width, height); 353 354 return em28xx_scaler_set(dev, v4l2->hscale, v4l2->vscale); 355 } 356 357 /* Set USB alternate setting for analog video */ 358 static int em28xx_set_alternate(struct em28xx *dev) 359 { 360 struct em28xx_v4l2 *v4l2 = dev->v4l2; 361 struct usb_device *udev = interface_to_usbdev(dev->intf); 362 int err; 363 int i; 364 unsigned int min_pkt_size = v4l2->width * 2 + 4; 365 366 /* 367 * NOTE: for isoc transfers, only alt settings > 0 are allowed 368 * bulk transfers seem to work only with alt=0 ! 369 */ 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 /* 380 * When image size is bigger than a certain value, 381 * the frame size should be increased, otherwise, only 382 * green screen will be received. 383 */ 384 if (v4l2->width * 2 * v4l2->height > 720 * 240 * 2) 385 min_pkt_size *= 2; 386 387 for (i = 0; i < dev->num_alt; i++) { 388 /* stop when the selected alt setting offers enough bandwidth */ 389 if (dev->alt_max_pkt_size_isoc[i] >= min_pkt_size) { 390 dev->alt = i; 391 break; 392 /* 393 * otherwise make sure that we end up with the maximum 394 * bandwidth because the min_pkt_size equation might be wrong. 395 * 396 */ 397 } else if (dev->alt_max_pkt_size_isoc[i] > 398 dev->alt_max_pkt_size_isoc[dev->alt]) 399 dev->alt = i; 400 } 401 402 set_alt: 403 /* 404 * NOTE: for bulk transfers, we need to call usb_set_interface() 405 * even if the previous settings were the same. Otherwise streaming 406 * fails with all urbs having status = -EOVERFLOW ! 407 */ 408 if (dev->analog_xfer_bulk) { 409 dev->max_pkt_size = 512; /* USB 2.0 spec */ 410 dev->packet_multiplier = EM28XX_BULK_PACKET_MULTIPLIER; 411 } else { /* isoc */ 412 em28xx_videodbg("minimum isoc packet size: %u (alt=%d)\n", 413 min_pkt_size, dev->alt); 414 dev->max_pkt_size = 415 dev->alt_max_pkt_size_isoc[dev->alt]; 416 dev->packet_multiplier = EM28XX_NUM_ISOC_PACKETS; 417 } 418 em28xx_videodbg("setting alternate %d with wMaxPacketSize=%u\n", 419 dev->alt, dev->max_pkt_size); 420 err = usb_set_interface(udev, dev->ifnum, dev->alt); 421 if (err < 0) { 422 dev_err(&dev->intf->dev, 423 "cannot change alternate number to %d (error=%i)\n", 424 dev->alt, err); 425 return err; 426 } 427 return 0; 428 } 429 430 /* 431 * DMA and thread functions 432 */ 433 434 /* 435 * Finish the current buffer 436 */ 437 static inline void finish_buffer(struct em28xx *dev, 438 struct em28xx_buffer *buf) 439 { 440 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field); 441 442 buf->vb.sequence = dev->v4l2->field_count++; 443 if (dev->v4l2->progressive) 444 buf->vb.field = V4L2_FIELD_NONE; 445 else 446 buf->vb.field = V4L2_FIELD_INTERLACED; 447 buf->vb.vb2_buf.timestamp = ktime_get_ns(); 448 449 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE); 450 } 451 452 /* 453 * Copy picture data from USB buffer to videobuf buffer 454 */ 455 static void em28xx_copy_video(struct em28xx *dev, 456 struct em28xx_buffer *buf, 457 unsigned char *usb_buf, 458 unsigned long len) 459 { 460 struct em28xx_v4l2 *v4l2 = dev->v4l2; 461 void *fieldstart, *startwrite, *startread; 462 int linesdone, currlinedone, offset, lencopy, remain; 463 int bytesperline = v4l2->width << 1; 464 465 if (buf->pos + len > buf->length) 466 len = buf->length - buf->pos; 467 468 startread = usb_buf; 469 remain = len; 470 471 if (v4l2->progressive || buf->top_field) 472 fieldstart = buf->vb_buf; 473 else /* interlaced mode, even nr. of lines */ 474 fieldstart = buf->vb_buf + bytesperline; 475 476 linesdone = buf->pos / bytesperline; 477 currlinedone = buf->pos % bytesperline; 478 479 if (v4l2->progressive) 480 offset = linesdone * bytesperline + currlinedone; 481 else 482 offset = linesdone * bytesperline * 2 + currlinedone; 483 484 startwrite = fieldstart + offset; 485 lencopy = bytesperline - currlinedone; 486 lencopy = lencopy > remain ? remain : lencopy; 487 488 if ((char *)startwrite + lencopy > (char *)buf->vb_buf + buf->length) { 489 em28xx_isocdbg("Overflow of %zu bytes past buffer end (1)\n", 490 ((char *)startwrite + lencopy) - 491 ((char *)buf->vb_buf + buf->length)); 492 remain = (char *)buf->vb_buf + buf->length - 493 (char *)startwrite; 494 lencopy = remain; 495 } 496 if (lencopy <= 0) 497 return; 498 memcpy(startwrite, startread, lencopy); 499 500 remain -= lencopy; 501 502 while (remain > 0) { 503 if (v4l2->progressive) 504 startwrite += lencopy; 505 else 506 startwrite += lencopy + bytesperline; 507 startread += lencopy; 508 if (bytesperline > remain) 509 lencopy = remain; 510 else 511 lencopy = bytesperline; 512 513 if ((char *)startwrite + lencopy > (char *)buf->vb_buf + 514 buf->length) { 515 em28xx_isocdbg("Overflow of %zu bytes past buffer end(2)\n", 516 ((char *)startwrite + lencopy) - 517 ((char *)buf->vb_buf + buf->length)); 518 remain = (char *)buf->vb_buf + buf->length - 519 (char *)startwrite; 520 lencopy = remain; 521 } 522 if (lencopy <= 0) 523 break; 524 525 memcpy(startwrite, startread, lencopy); 526 527 remain -= lencopy; 528 } 529 530 buf->pos += len; 531 } 532 533 /* 534 * Copy VBI data from USB buffer to videobuf buffer 535 */ 536 static void em28xx_copy_vbi(struct em28xx *dev, 537 struct em28xx_buffer *buf, 538 unsigned char *usb_buf, 539 unsigned long len) 540 { 541 unsigned int offset; 542 543 if (buf->pos + len > buf->length) 544 len = buf->length - buf->pos; 545 546 offset = buf->pos; 547 /* Make sure the bottom field populates the second half of the frame */ 548 if (buf->top_field == 0) 549 offset += dev->v4l2->vbi_width * dev->v4l2->vbi_height; 550 551 memcpy(buf->vb_buf + offset, usb_buf, len); 552 buf->pos += len; 553 } 554 555 static inline void print_err_status(struct em28xx *dev, 556 int packet, int status) 557 { 558 char *errmsg = "Unknown"; 559 560 switch (status) { 561 case -ENOENT: 562 errmsg = "unlinked synchronously"; 563 break; 564 case -ECONNRESET: 565 errmsg = "unlinked asynchronously"; 566 break; 567 case -ENOSR: 568 errmsg = "Buffer error (overrun)"; 569 break; 570 case -EPIPE: 571 errmsg = "Stalled (device not responding)"; 572 break; 573 case -EOVERFLOW: 574 errmsg = "Babble (bad cable?)"; 575 break; 576 case -EPROTO: 577 errmsg = "Bit-stuff error (bad cable?)"; 578 break; 579 case -EILSEQ: 580 errmsg = "CRC/Timeout (could be anything)"; 581 break; 582 case -ETIME: 583 errmsg = "Device does not respond"; 584 break; 585 } 586 if (packet < 0) { 587 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg); 588 } else { 589 em28xx_isocdbg("URB packet %d, status %d [%s].\n", 590 packet, status, errmsg); 591 } 592 } 593 594 /* 595 * get the next available buffer from dma queue 596 */ 597 static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev, 598 struct em28xx_dmaqueue *dma_q) 599 { 600 struct em28xx_buffer *buf; 601 602 if (list_empty(&dma_q->active)) { 603 em28xx_isocdbg("No active queue to serve\n"); 604 return NULL; 605 } 606 607 /* Get the next buffer */ 608 buf = list_entry(dma_q->active.next, struct em28xx_buffer, list); 609 /* Cleans up buffer - Useful for testing for frame/URB loss */ 610 list_del(&buf->list); 611 buf->pos = 0; 612 buf->vb_buf = buf->mem; 613 614 return buf; 615 } 616 617 /* 618 * Finish the current buffer if completed and prepare for the next field 619 */ 620 static struct em28xx_buffer * 621 finish_field_prepare_next(struct em28xx *dev, 622 struct em28xx_buffer *buf, 623 struct em28xx_dmaqueue *dma_q) 624 { 625 struct em28xx_v4l2 *v4l2 = dev->v4l2; 626 627 if (v4l2->progressive || v4l2->top_field) { /* Brand new frame */ 628 if (buf) 629 finish_buffer(dev, buf); 630 buf = get_next_buf(dev, dma_q); 631 } 632 if (buf) { 633 buf->top_field = v4l2->top_field; 634 buf->pos = 0; 635 } 636 637 return buf; 638 } 639 640 /* 641 * Process data packet according to the em2710/em2750/em28xx frame data format 642 */ 643 static inline void process_frame_data_em28xx(struct em28xx *dev, 644 unsigned char *data_pkt, 645 unsigned int data_len) 646 { 647 struct em28xx_v4l2 *v4l2 = dev->v4l2; 648 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf; 649 struct em28xx_buffer *vbi_buf = dev->usb_ctl.vbi_buf; 650 struct em28xx_dmaqueue *dma_q = &dev->vidq; 651 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq; 652 653 /* 654 * capture type 0 = vbi start 655 * capture type 1 = vbi in progress 656 * capture type 2 = video start 657 * capture type 3 = video in progress 658 */ 659 if (data_len >= 4) { 660 /* 661 * NOTE: Headers are always 4 bytes and 662 * never split across packets 663 */ 664 if (data_pkt[0] == 0x88 && data_pkt[1] == 0x88 && 665 data_pkt[2] == 0x88 && data_pkt[3] == 0x88) { 666 /* Continuation */ 667 data_pkt += 4; 668 data_len -= 4; 669 } else if (data_pkt[0] == 0x33 && data_pkt[1] == 0x95) { 670 /* Field start (VBI mode) */ 671 v4l2->capture_type = 0; 672 v4l2->vbi_read = 0; 673 em28xx_isocdbg("VBI START HEADER !!!\n"); 674 v4l2->top_field = !(data_pkt[2] & 1); 675 data_pkt += 4; 676 data_len -= 4; 677 } else if (data_pkt[0] == 0x22 && data_pkt[1] == 0x5a) { 678 /* Field start (VBI disabled) */ 679 v4l2->capture_type = 2; 680 em28xx_isocdbg("VIDEO START HEADER !!!\n"); 681 v4l2->top_field = !(data_pkt[2] & 1); 682 data_pkt += 4; 683 data_len -= 4; 684 } 685 } 686 /* 687 * NOTE: With bulk transfers, intermediate data packets 688 * have no continuation header 689 */ 690 691 if (v4l2->capture_type == 0) { 692 vbi_buf = finish_field_prepare_next(dev, vbi_buf, vbi_dma_q); 693 dev->usb_ctl.vbi_buf = vbi_buf; 694 v4l2->capture_type = 1; 695 } 696 697 if (v4l2->capture_type == 1) { 698 int vbi_size = v4l2->vbi_width * v4l2->vbi_height; 699 int vbi_data_len = ((v4l2->vbi_read + data_len) > vbi_size) ? 700 (vbi_size - v4l2->vbi_read) : data_len; 701 702 /* Copy VBI data */ 703 if (vbi_buf) 704 em28xx_copy_vbi(dev, vbi_buf, data_pkt, vbi_data_len); 705 v4l2->vbi_read += vbi_data_len; 706 707 if (vbi_data_len < data_len) { 708 /* Continue with copying video data */ 709 v4l2->capture_type = 2; 710 data_pkt += vbi_data_len; 711 data_len -= vbi_data_len; 712 } 713 } 714 715 if (v4l2->capture_type == 2) { 716 buf = finish_field_prepare_next(dev, buf, dma_q); 717 dev->usb_ctl.vid_buf = buf; 718 v4l2->capture_type = 3; 719 } 720 721 if (v4l2->capture_type == 3 && buf && data_len > 0) 722 em28xx_copy_video(dev, buf, data_pkt, data_len); 723 } 724 725 /* 726 * Process data packet according to the em25xx/em276x/7x/8x frame data format 727 */ 728 static inline void process_frame_data_em25xx(struct em28xx *dev, 729 unsigned char *data_pkt, 730 unsigned int data_len) 731 { 732 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf; 733 struct em28xx_dmaqueue *dmaq = &dev->vidq; 734 struct em28xx_v4l2 *v4l2 = dev->v4l2; 735 bool frame_end = false; 736 737 /* Check for header */ 738 /* 739 * NOTE: at least with bulk transfers, only the first packet 740 * has a header and has always set the FRAME_END bit 741 */ 742 if (data_len >= 2) { /* em25xx header is only 2 bytes long */ 743 if ((data_pkt[0] == EM25XX_FRMDATAHDR_BYTE1) && 744 ((data_pkt[1] & ~EM25XX_FRMDATAHDR_BYTE2_MASK) == 0x00)) { 745 v4l2->top_field = !(data_pkt[1] & 746 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID); 747 frame_end = data_pkt[1] & 748 EM25XX_FRMDATAHDR_BYTE2_FRAME_END; 749 data_pkt += 2; 750 data_len -= 2; 751 } 752 753 /* Finish field and prepare next (BULK only) */ 754 if (dev->analog_xfer_bulk && frame_end) { 755 buf = finish_field_prepare_next(dev, buf, dmaq); 756 dev->usb_ctl.vid_buf = buf; 757 } 758 /* 759 * NOTE: in ISOC mode when a new frame starts and buf==NULL, 760 * we COULD already prepare a buffer here to avoid skipping the 761 * first frame. 762 */ 763 } 764 765 /* Copy data */ 766 if (buf && data_len > 0) 767 em28xx_copy_video(dev, buf, data_pkt, data_len); 768 769 /* Finish frame (ISOC only) => avoids lag of 1 frame */ 770 if (!dev->analog_xfer_bulk && frame_end) { 771 buf = finish_field_prepare_next(dev, buf, dmaq); 772 dev->usb_ctl.vid_buf = buf; 773 } 774 775 /* 776 * NOTES: 777 * 778 * 1) Tested with USB bulk transfers only ! 779 * The wording in the datasheet suggests that isoc might work different. 780 * The current code assumes that with isoc transfers each packet has a 781 * header like with the other em28xx devices. 782 * 783 * 2) Support for interlaced mode is pure theory. It has not been 784 * tested and it is unknown if these devices actually support it. 785 */ 786 } 787 788 /* Processes and copies the URB data content (video and VBI data) */ 789 static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb) 790 { 791 int xfer_bulk, num_packets, i; 792 unsigned char *usb_data_pkt; 793 unsigned int usb_data_len; 794 795 if (!dev) 796 return 0; 797 798 if (dev->disconnected) 799 return 0; 800 801 if (urb->status < 0) 802 print_err_status(dev, -1, urb->status); 803 804 xfer_bulk = usb_pipebulk(urb->pipe); 805 806 if (xfer_bulk) /* bulk */ 807 num_packets = 1; 808 else /* isoc */ 809 num_packets = urb->number_of_packets; 810 811 for (i = 0; i < num_packets; i++) { 812 if (xfer_bulk) { /* bulk */ 813 usb_data_len = urb->actual_length; 814 815 usb_data_pkt = urb->transfer_buffer; 816 } else { /* isoc */ 817 if (urb->iso_frame_desc[i].status < 0) { 818 print_err_status(dev, i, 819 urb->iso_frame_desc[i].status); 820 if (urb->iso_frame_desc[i].status != -EPROTO) 821 continue; 822 } 823 824 usb_data_len = urb->iso_frame_desc[i].actual_length; 825 if (usb_data_len > dev->max_pkt_size) { 826 em28xx_isocdbg("packet bigger than packet size"); 827 continue; 828 } 829 830 usb_data_pkt = urb->transfer_buffer + 831 urb->iso_frame_desc[i].offset; 832 } 833 834 if (usb_data_len == 0) { 835 /* NOTE: happens very often with isoc transfers */ 836 /* em28xx_usbdbg("packet %d is empty",i); - spammy */ 837 continue; 838 } 839 840 if (dev->is_em25xx) 841 process_frame_data_em25xx(dev, 842 usb_data_pkt, usb_data_len); 843 else 844 process_frame_data_em28xx(dev, 845 usb_data_pkt, usb_data_len); 846 } 847 return 1; 848 } 849 850 static int get_resource(enum v4l2_buf_type f_type) 851 { 852 switch (f_type) { 853 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 854 return EM28XX_RESOURCE_VIDEO; 855 case V4L2_BUF_TYPE_VBI_CAPTURE: 856 return EM28XX_RESOURCE_VBI; 857 default: 858 WARN_ON(1); 859 return -1; /* Indicate that device is busy */ 860 } 861 } 862 863 /* Usage lock check functions */ 864 static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type) 865 { 866 int res_type = get_resource(f_type); 867 868 /* is it free? */ 869 if (dev->resources & res_type) { 870 /* no, someone else uses it */ 871 return -EBUSY; 872 } 873 874 /* it's free, grab it */ 875 dev->resources |= res_type; 876 em28xx_videodbg("res: get %d\n", res_type); 877 return 0; 878 } 879 880 static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type) 881 { 882 int res_type = get_resource(f_type); 883 884 dev->resources &= ~res_type; 885 em28xx_videodbg("res: put %d\n", res_type); 886 } 887 888 static void em28xx_v4l2_media_release(struct em28xx *dev) 889 { 890 #ifdef CONFIG_MEDIA_CONTROLLER 891 int i; 892 893 for (i = 0; i < MAX_EM28XX_INPUT; i++) { 894 if (!INPUT(i)->type) 895 return; 896 media_device_unregister_entity(&dev->input_ent[i]); 897 } 898 #endif 899 } 900 901 /* 902 * Media Controller helper functions 903 */ 904 905 static int em28xx_enable_analog_tuner(struct em28xx *dev) 906 { 907 #ifdef CONFIG_MEDIA_CONTROLLER 908 struct media_device *mdev = dev->media_dev; 909 struct em28xx_v4l2 *v4l2 = dev->v4l2; 910 struct media_entity *source; 911 struct media_link *link, *found_link = NULL; 912 int ret, active_links = 0; 913 914 if (!mdev || !v4l2->decoder) 915 return 0; 916 917 /* 918 * This will find the tuner that is connected into the decoder. 919 * Technically, this is not 100% correct, as the device may be 920 * using an analog input instead of the tuner. However, as we can't 921 * do DVB streaming while the DMA engine is being used for V4L2, 922 * this should be enough for the actual needs. 923 */ 924 list_for_each_entry(link, &v4l2->decoder->links, list) { 925 if (link->sink->entity == v4l2->decoder) { 926 found_link = link; 927 if (link->flags & MEDIA_LNK_FL_ENABLED) 928 active_links++; 929 break; 930 } 931 } 932 933 if (active_links == 1 || !found_link) 934 return 0; 935 936 source = found_link->source->entity; 937 list_for_each_entry(link, &source->links, list) { 938 struct media_entity *sink; 939 int flags = 0; 940 941 sink = link->sink->entity; 942 943 if (sink == v4l2->decoder) 944 flags = MEDIA_LNK_FL_ENABLED; 945 946 ret = media_entity_setup_link(link, flags); 947 if (ret) { 948 dev_err(&dev->intf->dev, 949 "Couldn't change link %s->%s to %s. Error %d\n", 950 source->name, sink->name, 951 flags ? "enabled" : "disabled", 952 ret); 953 return ret; 954 } 955 956 em28xx_videodbg("link %s->%s was %s\n", 957 source->name, sink->name, 958 flags ? "ENABLED" : "disabled"); 959 } 960 #endif 961 return 0; 962 } 963 964 static const char * const iname[] = { 965 [EM28XX_VMUX_COMPOSITE] = "Composite", 966 [EM28XX_VMUX_SVIDEO] = "S-Video", 967 [EM28XX_VMUX_TELEVISION] = "Television", 968 [EM28XX_RADIO] = "Radio", 969 }; 970 971 static void em28xx_v4l2_create_entities(struct em28xx *dev) 972 { 973 #if defined(CONFIG_MEDIA_CONTROLLER) 974 struct em28xx_v4l2 *v4l2 = dev->v4l2; 975 int ret, i; 976 977 /* Initialize Video, VBI and Radio pads */ 978 v4l2->video_pad.flags = MEDIA_PAD_FL_SINK; 979 ret = media_entity_pads_init(&v4l2->vdev.entity, 1, &v4l2->video_pad); 980 if (ret < 0) 981 dev_err(&dev->intf->dev, 982 "failed to initialize video media entity!\n"); 983 984 if (em28xx_vbi_supported(dev)) { 985 v4l2->vbi_pad.flags = MEDIA_PAD_FL_SINK; 986 ret = media_entity_pads_init(&v4l2->vbi_dev.entity, 1, 987 &v4l2->vbi_pad); 988 if (ret < 0) 989 dev_err(&dev->intf->dev, 990 "failed to initialize vbi media entity!\n"); 991 } 992 993 /* Webcams don't have input connectors */ 994 if (dev->is_webcam) 995 return; 996 997 /* Create entities for each input connector */ 998 for (i = 0; i < MAX_EM28XX_INPUT; i++) { 999 struct media_entity *ent = &dev->input_ent[i]; 1000 1001 if (!INPUT(i)->type) 1002 break; 1003 1004 ent->name = iname[INPUT(i)->type]; 1005 ent->flags = MEDIA_ENT_FL_CONNECTOR; 1006 dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE; 1007 1008 switch (INPUT(i)->type) { 1009 case EM28XX_VMUX_COMPOSITE: 1010 ent->function = MEDIA_ENT_F_CONN_COMPOSITE; 1011 break; 1012 case EM28XX_VMUX_SVIDEO: 1013 ent->function = MEDIA_ENT_F_CONN_SVIDEO; 1014 break; 1015 default: /* EM28XX_VMUX_TELEVISION or EM28XX_RADIO */ 1016 if (dev->tuner_type != TUNER_ABSENT) 1017 ent->function = MEDIA_ENT_F_CONN_RF; 1018 break; 1019 } 1020 1021 ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]); 1022 if (ret < 0) 1023 dev_err(&dev->intf->dev, 1024 "failed to initialize input pad[%d]!\n", i); 1025 1026 ret = media_device_register_entity(dev->media_dev, ent); 1027 if (ret < 0) 1028 dev_err(&dev->intf->dev, 1029 "failed to register input entity %d!\n", i); 1030 } 1031 #endif 1032 } 1033 1034 /* 1035 * Videobuf2 operations 1036 */ 1037 1038 static int queue_setup(struct vb2_queue *vq, 1039 unsigned int *nbuffers, unsigned int *nplanes, 1040 unsigned int sizes[], struct device *alloc_devs[]) 1041 { 1042 struct em28xx *dev = vb2_get_drv_priv(vq); 1043 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1044 unsigned long size = 1045 (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3; 1046 1047 if (*nplanes) 1048 return sizes[0] < size ? -EINVAL : 0; 1049 *nplanes = 1; 1050 sizes[0] = size; 1051 1052 em28xx_enable_analog_tuner(dev); 1053 1054 return 0; 1055 } 1056 1057 static int 1058 buffer_prepare(struct vb2_buffer *vb) 1059 { 1060 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 1061 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue); 1062 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1063 unsigned long size; 1064 1065 em28xx_videodbg("%s, field=%d\n", __func__, vbuf->field); 1066 1067 size = (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3; 1068 1069 if (vb2_plane_size(vb, 0) < size) { 1070 em28xx_videodbg("%s data will not fit into plane (%lu < %lu)\n", 1071 __func__, vb2_plane_size(vb, 0), size); 1072 return -EINVAL; 1073 } 1074 vb2_set_plane_payload(vb, 0, size); 1075 1076 return 0; 1077 } 1078 1079 int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count) 1080 { 1081 struct em28xx *dev = vb2_get_drv_priv(vq); 1082 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1083 struct v4l2_frequency f; 1084 struct v4l2_fh *owner; 1085 int rc = 0; 1086 1087 em28xx_videodbg("%s\n", __func__); 1088 1089 dev->v4l2->field_count = 0; 1090 1091 /* 1092 * Make sure streaming is not already in progress for this type 1093 * of filehandle (e.g. video, vbi) 1094 */ 1095 rc = res_get(dev, vq->type); 1096 if (rc) 1097 return rc; 1098 1099 if (v4l2->streaming_users == 0) { 1100 /* First active streaming user, so allocate all the URBs */ 1101 1102 /* Allocate the USB bandwidth */ 1103 em28xx_set_alternate(dev); 1104 1105 /* 1106 * Needed, since GPIO might have disabled power of 1107 * some i2c device 1108 */ 1109 em28xx_wake_i2c(dev); 1110 1111 v4l2->capture_type = -1; 1112 rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE, 1113 dev->analog_xfer_bulk, 1114 EM28XX_NUM_BUFS, 1115 dev->max_pkt_size, 1116 dev->packet_multiplier, 1117 em28xx_urb_data_copy); 1118 if (rc < 0) 1119 return rc; 1120 1121 /* 1122 * djh: it's not clear whether this code is still needed. I'm 1123 * leaving it in here for now entirely out of concern for 1124 * backward compatibility (the old code did it) 1125 */ 1126 1127 /* Ask tuner to go to analog or radio mode */ 1128 memset(&f, 0, sizeof(f)); 1129 f.frequency = v4l2->frequency; 1130 owner = (struct v4l2_fh *)vq->owner; 1131 if (owner && owner->vdev->vfl_type == VFL_TYPE_RADIO) 1132 f.type = V4L2_TUNER_RADIO; 1133 else 1134 f.type = V4L2_TUNER_ANALOG_TV; 1135 v4l2_device_call_all(&v4l2->v4l2_dev, 1136 0, tuner, s_frequency, &f); 1137 1138 /* Enable video stream at TV decoder */ 1139 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 1); 1140 } 1141 1142 v4l2->streaming_users++; 1143 1144 return rc; 1145 } 1146 1147 static void em28xx_stop_streaming(struct vb2_queue *vq) 1148 { 1149 struct em28xx *dev = vb2_get_drv_priv(vq); 1150 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1151 struct em28xx_dmaqueue *vidq = &dev->vidq; 1152 unsigned long flags = 0; 1153 1154 em28xx_videodbg("%s\n", __func__); 1155 1156 res_free(dev, vq->type); 1157 1158 if (v4l2->streaming_users-- == 1) { 1159 /* Disable video stream at TV decoder */ 1160 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0); 1161 1162 /* Last active user, so shutdown all the URBS */ 1163 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); 1164 } 1165 1166 spin_lock_irqsave(&dev->slock, flags); 1167 if (dev->usb_ctl.vid_buf) { 1168 vb2_buffer_done(&dev->usb_ctl.vid_buf->vb.vb2_buf, 1169 VB2_BUF_STATE_ERROR); 1170 dev->usb_ctl.vid_buf = NULL; 1171 } 1172 while (!list_empty(&vidq->active)) { 1173 struct em28xx_buffer *buf; 1174 1175 buf = list_entry(vidq->active.next, struct em28xx_buffer, list); 1176 list_del(&buf->list); 1177 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 1178 } 1179 spin_unlock_irqrestore(&dev->slock, flags); 1180 } 1181 1182 void em28xx_stop_vbi_streaming(struct vb2_queue *vq) 1183 { 1184 struct em28xx *dev = vb2_get_drv_priv(vq); 1185 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1186 struct em28xx_dmaqueue *vbiq = &dev->vbiq; 1187 unsigned long flags = 0; 1188 1189 em28xx_videodbg("%s\n", __func__); 1190 1191 res_free(dev, vq->type); 1192 1193 if (v4l2->streaming_users-- == 1) { 1194 /* Disable video stream at TV decoder */ 1195 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0); 1196 1197 /* Last active user, so shutdown all the URBS */ 1198 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); 1199 } 1200 1201 spin_lock_irqsave(&dev->slock, flags); 1202 if (dev->usb_ctl.vbi_buf) { 1203 vb2_buffer_done(&dev->usb_ctl.vbi_buf->vb.vb2_buf, 1204 VB2_BUF_STATE_ERROR); 1205 dev->usb_ctl.vbi_buf = NULL; 1206 } 1207 while (!list_empty(&vbiq->active)) { 1208 struct em28xx_buffer *buf; 1209 1210 buf = list_entry(vbiq->active.next, struct em28xx_buffer, list); 1211 list_del(&buf->list); 1212 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 1213 } 1214 spin_unlock_irqrestore(&dev->slock, flags); 1215 } 1216 1217 static void 1218 buffer_queue(struct vb2_buffer *vb) 1219 { 1220 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 1221 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue); 1222 struct em28xx_buffer *buf = 1223 container_of(vbuf, struct em28xx_buffer, vb); 1224 struct em28xx_dmaqueue *vidq = &dev->vidq; 1225 unsigned long flags = 0; 1226 1227 em28xx_videodbg("%s\n", __func__); 1228 buf->mem = vb2_plane_vaddr(vb, 0); 1229 buf->length = vb2_plane_size(vb, 0); 1230 1231 spin_lock_irqsave(&dev->slock, flags); 1232 list_add_tail(&buf->list, &vidq->active); 1233 spin_unlock_irqrestore(&dev->slock, flags); 1234 } 1235 1236 static const struct vb2_ops em28xx_video_qops = { 1237 .queue_setup = queue_setup, 1238 .buf_prepare = buffer_prepare, 1239 .buf_queue = buffer_queue, 1240 .start_streaming = em28xx_start_analog_streaming, 1241 .stop_streaming = em28xx_stop_streaming, 1242 .wait_prepare = vb2_ops_wait_prepare, 1243 .wait_finish = vb2_ops_wait_finish, 1244 }; 1245 1246 static int em28xx_vb2_setup(struct em28xx *dev) 1247 { 1248 int rc; 1249 struct vb2_queue *q; 1250 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1251 1252 /* Setup Videobuf2 for Video capture */ 1253 q = &v4l2->vb_vidq; 1254 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1255 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF; 1256 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1257 q->drv_priv = dev; 1258 q->buf_struct_size = sizeof(struct em28xx_buffer); 1259 q->ops = &em28xx_video_qops; 1260 q->mem_ops = &vb2_vmalloc_memops; 1261 1262 rc = vb2_queue_init(q); 1263 if (rc < 0) 1264 return rc; 1265 1266 /* Setup Videobuf2 for VBI capture */ 1267 q = &v4l2->vb_vbiq; 1268 q->type = V4L2_BUF_TYPE_VBI_CAPTURE; 1269 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR; 1270 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1271 q->drv_priv = dev; 1272 q->buf_struct_size = sizeof(struct em28xx_buffer); 1273 q->ops = &em28xx_vbi_qops; 1274 q->mem_ops = &vb2_vmalloc_memops; 1275 1276 rc = vb2_queue_init(q); 1277 if (rc < 0) 1278 return rc; 1279 1280 return 0; 1281 } 1282 1283 /* 1284 * v4l2 interface 1285 */ 1286 1287 static void video_mux(struct em28xx *dev, int index) 1288 { 1289 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev; 1290 1291 dev->ctl_input = index; 1292 dev->ctl_ainput = INPUT(index)->amux; 1293 dev->ctl_aoutput = INPUT(index)->aout; 1294 1295 if (!dev->ctl_aoutput) 1296 dev->ctl_aoutput = EM28XX_AOUT_MASTER; 1297 1298 v4l2_device_call_all(v4l2_dev, 0, video, s_routing, 1299 INPUT(index)->vmux, 0, 0); 1300 1301 if (dev->has_msp34xx) { 1302 if (dev->i2s_speed) { 1303 v4l2_device_call_all(v4l2_dev, 0, audio, 1304 s_i2s_clock_freq, dev->i2s_speed); 1305 } 1306 /* Note: this is msp3400 specific */ 1307 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing, 1308 dev->ctl_ainput, 1309 MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0); 1310 } 1311 1312 if (dev->board.adecoder != EM28XX_NOADECODER) { 1313 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing, 1314 dev->ctl_ainput, dev->ctl_aoutput, 0); 1315 } 1316 1317 em28xx_audio_analog_set(dev); 1318 } 1319 1320 static void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv) 1321 { 1322 struct em28xx *dev = priv; 1323 1324 /* 1325 * In the case of non-AC97 volume controls, we still need 1326 * to do some setups at em28xx, in order to mute/unmute 1327 * and to adjust audio volume. However, the value ranges 1328 * should be checked by the corresponding V4L subdriver. 1329 */ 1330 switch (ctrl->id) { 1331 case V4L2_CID_AUDIO_MUTE: 1332 dev->mute = ctrl->val; 1333 em28xx_audio_analog_set(dev); 1334 break; 1335 case V4L2_CID_AUDIO_VOLUME: 1336 dev->volume = ctrl->val; 1337 em28xx_audio_analog_set(dev); 1338 break; 1339 } 1340 } 1341 1342 static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl) 1343 { 1344 struct em28xx_v4l2 *v4l2 = 1345 container_of(ctrl->handler, struct em28xx_v4l2, ctrl_handler); 1346 struct em28xx *dev = v4l2->dev; 1347 int ret = -EINVAL; 1348 1349 switch (ctrl->id) { 1350 case V4L2_CID_AUDIO_MUTE: 1351 dev->mute = ctrl->val; 1352 ret = em28xx_audio_analog_set(dev); 1353 break; 1354 case V4L2_CID_AUDIO_VOLUME: 1355 dev->volume = ctrl->val; 1356 ret = em28xx_audio_analog_set(dev); 1357 break; 1358 case V4L2_CID_CONTRAST: 1359 ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val); 1360 break; 1361 case V4L2_CID_BRIGHTNESS: 1362 ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val); 1363 break; 1364 case V4L2_CID_SATURATION: 1365 ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val); 1366 break; 1367 case V4L2_CID_BLUE_BALANCE: 1368 ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val); 1369 break; 1370 case V4L2_CID_RED_BALANCE: 1371 ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val); 1372 break; 1373 case V4L2_CID_SHARPNESS: 1374 ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val); 1375 break; 1376 } 1377 1378 return (ret < 0) ? ret : 0; 1379 } 1380 1381 static const struct v4l2_ctrl_ops em28xx_ctrl_ops = { 1382 .s_ctrl = em28xx_s_ctrl, 1383 }; 1384 1385 static void size_to_scale(struct em28xx *dev, 1386 unsigned int width, unsigned int height, 1387 unsigned int *hscale, unsigned int *vscale) 1388 { 1389 unsigned int maxw = norm_maxw(dev); 1390 unsigned int maxh = norm_maxh(dev); 1391 1392 *hscale = (((unsigned long)maxw) << 12) / width - 4096L; 1393 if (*hscale > EM28XX_HVSCALE_MAX) 1394 *hscale = EM28XX_HVSCALE_MAX; 1395 1396 *vscale = (((unsigned long)maxh) << 12) / height - 4096L; 1397 if (*vscale > EM28XX_HVSCALE_MAX) 1398 *vscale = EM28XX_HVSCALE_MAX; 1399 } 1400 1401 static void scale_to_size(struct em28xx *dev, 1402 unsigned int hscale, unsigned int vscale, 1403 unsigned int *width, unsigned int *height) 1404 { 1405 unsigned int maxw = norm_maxw(dev); 1406 unsigned int maxh = norm_maxh(dev); 1407 1408 *width = (((unsigned long)maxw) << 12) / (hscale + 4096L); 1409 *height = (((unsigned long)maxh) << 12) / (vscale + 4096L); 1410 1411 /* Don't let width or height to be zero */ 1412 if (*width < 1) 1413 *width = 1; 1414 if (*height < 1) 1415 *height = 1; 1416 } 1417 1418 /* 1419 * IOCTL vidioc handling 1420 */ 1421 1422 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 1423 struct v4l2_format *f) 1424 { 1425 struct em28xx *dev = video_drvdata(file); 1426 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1427 1428 f->fmt.pix.width = v4l2->width; 1429 f->fmt.pix.height = v4l2->height; 1430 f->fmt.pix.pixelformat = v4l2->format->fourcc; 1431 f->fmt.pix.bytesperline = (v4l2->width * v4l2->format->depth + 7) >> 3; 1432 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * v4l2->height; 1433 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 1434 1435 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */ 1436 if (v4l2->progressive) 1437 f->fmt.pix.field = V4L2_FIELD_NONE; 1438 else 1439 f->fmt.pix.field = v4l2->interlaced_fieldmode ? 1440 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; 1441 return 0; 1442 } 1443 1444 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc) 1445 { 1446 unsigned int i; 1447 1448 for (i = 0; i < ARRAY_SIZE(format); i++) 1449 if (format[i].fourcc == fourcc) 1450 return &format[i]; 1451 1452 return NULL; 1453 } 1454 1455 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 1456 struct v4l2_format *f) 1457 { 1458 struct em28xx *dev = video_drvdata(file); 1459 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1460 unsigned int width = f->fmt.pix.width; 1461 unsigned int height = f->fmt.pix.height; 1462 unsigned int maxw = norm_maxw(dev); 1463 unsigned int maxh = norm_maxh(dev); 1464 unsigned int hscale, vscale; 1465 struct em28xx_fmt *fmt; 1466 1467 fmt = format_by_fourcc(f->fmt.pix.pixelformat); 1468 if (!fmt) { 1469 fmt = &format[0]; 1470 em28xx_videodbg("Fourcc format (%08x) invalid. Using default (%08x).\n", 1471 f->fmt.pix.pixelformat, fmt->fourcc); 1472 } 1473 1474 if (dev->board.is_em2800) { 1475 /* the em2800 can only scale down to 50% */ 1476 height = height > (3 * maxh / 4) ? maxh : maxh / 2; 1477 width = width > (3 * maxw / 4) ? maxw : maxw / 2; 1478 /* 1479 * MaxPacketSize for em2800 is too small to capture at full 1480 * resolution use half of maxw as the scaler can only scale 1481 * to 50% 1482 */ 1483 if (width == maxw && height == maxh) 1484 width /= 2; 1485 } else { 1486 /* 1487 * width must even because of the YUYV format 1488 * height must be even because of interlacing 1489 */ 1490 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh, 1491 1, 0); 1492 } 1493 /* Avoid division by zero at size_to_scale */ 1494 if (width < 1) 1495 width = 1; 1496 if (height < 1) 1497 height = 1; 1498 1499 size_to_scale(dev, width, height, &hscale, &vscale); 1500 scale_to_size(dev, hscale, vscale, &width, &height); 1501 1502 f->fmt.pix.width = width; 1503 f->fmt.pix.height = height; 1504 f->fmt.pix.pixelformat = fmt->fourcc; 1505 f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3; 1506 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height; 1507 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 1508 if (v4l2->progressive) 1509 f->fmt.pix.field = V4L2_FIELD_NONE; 1510 else 1511 f->fmt.pix.field = v4l2->interlaced_fieldmode ? 1512 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; 1513 f->fmt.pix.priv = 0; 1514 1515 return 0; 1516 } 1517 1518 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc, 1519 unsigned int width, unsigned int height) 1520 { 1521 struct em28xx_fmt *fmt; 1522 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1523 1524 fmt = format_by_fourcc(fourcc); 1525 if (!fmt) 1526 return -EINVAL; 1527 1528 v4l2->format = fmt; 1529 v4l2->width = width; 1530 v4l2->height = height; 1531 1532 /* set new image size */ 1533 size_to_scale(dev, v4l2->width, v4l2->height, 1534 &v4l2->hscale, &v4l2->vscale); 1535 1536 em28xx_resolution_set(dev); 1537 1538 return 0; 1539 } 1540 1541 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 1542 struct v4l2_format *f) 1543 { 1544 struct em28xx *dev = video_drvdata(file); 1545 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1546 1547 if (vb2_is_busy(&v4l2->vb_vidq)) 1548 return -EBUSY; 1549 1550 vidioc_try_fmt_vid_cap(file, priv, f); 1551 1552 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat, 1553 f->fmt.pix.width, f->fmt.pix.height); 1554 } 1555 1556 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm) 1557 { 1558 struct em28xx *dev = video_drvdata(file); 1559 1560 *norm = dev->v4l2->norm; 1561 1562 return 0; 1563 } 1564 1565 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm) 1566 { 1567 struct em28xx *dev = video_drvdata(file); 1568 1569 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm); 1570 1571 return 0; 1572 } 1573 1574 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm) 1575 { 1576 struct em28xx *dev = video_drvdata(file); 1577 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1578 struct v4l2_format f; 1579 1580 if (norm == v4l2->norm) 1581 return 0; 1582 1583 if (v4l2->streaming_users > 0) 1584 return -EBUSY; 1585 1586 v4l2->norm = norm; 1587 1588 /* Adjusts width/height, if needed */ 1589 f.fmt.pix.width = 720; 1590 f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576; 1591 vidioc_try_fmt_vid_cap(file, priv, &f); 1592 1593 /* set new image size */ 1594 v4l2->width = f.fmt.pix.width; 1595 v4l2->height = f.fmt.pix.height; 1596 size_to_scale(dev, v4l2->width, v4l2->height, 1597 &v4l2->hscale, &v4l2->vscale); 1598 1599 em28xx_resolution_set(dev); 1600 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm); 1601 1602 return 0; 1603 } 1604 1605 static int vidioc_g_parm(struct file *file, void *priv, 1606 struct v4l2_streamparm *p) 1607 { 1608 struct v4l2_subdev_frame_interval ival = { 0 }; 1609 struct em28xx *dev = video_drvdata(file); 1610 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1611 int rc = 0; 1612 1613 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1614 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1615 return -EINVAL; 1616 1617 p->parm.capture.readbuffers = EM28XX_MIN_BUF; 1618 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 1619 if (dev->is_webcam) { 1620 rc = v4l2_device_call_until_err(&v4l2->v4l2_dev, 0, 1621 video, g_frame_interval, &ival); 1622 if (!rc) 1623 p->parm.capture.timeperframe = ival.interval; 1624 } else { 1625 v4l2_video_std_frame_period(v4l2->norm, 1626 &p->parm.capture.timeperframe); 1627 } 1628 1629 return rc; 1630 } 1631 1632 static int vidioc_s_parm(struct file *file, void *priv, 1633 struct v4l2_streamparm *p) 1634 { 1635 struct em28xx *dev = video_drvdata(file); 1636 struct v4l2_subdev_frame_interval ival = { 1637 0, 1638 p->parm.capture.timeperframe 1639 }; 1640 int rc = 0; 1641 1642 if (!dev->is_webcam) 1643 return -ENOTTY; 1644 1645 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1646 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1647 return -EINVAL; 1648 1649 memset(&p->parm, 0, sizeof(p->parm)); 1650 p->parm.capture.readbuffers = EM28XX_MIN_BUF; 1651 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 1652 rc = v4l2_device_call_until_err(&dev->v4l2->v4l2_dev, 0, 1653 video, s_frame_interval, &ival); 1654 if (!rc) 1655 p->parm.capture.timeperframe = ival.interval; 1656 return rc; 1657 } 1658 1659 static int vidioc_enum_input(struct file *file, void *priv, 1660 struct v4l2_input *i) 1661 { 1662 struct em28xx *dev = video_drvdata(file); 1663 unsigned int n; 1664 int j; 1665 1666 n = i->index; 1667 if (n >= MAX_EM28XX_INPUT) 1668 return -EINVAL; 1669 if (!INPUT(n)->type) 1670 return -EINVAL; 1671 1672 i->type = V4L2_INPUT_TYPE_CAMERA; 1673 1674 strscpy(i->name, iname[INPUT(n)->type], sizeof(i->name)); 1675 1676 if (INPUT(n)->type == EM28XX_VMUX_TELEVISION) 1677 i->type = V4L2_INPUT_TYPE_TUNER; 1678 1679 i->std = dev->v4l2->vdev.tvnorms; 1680 /* webcams do not have the STD API */ 1681 if (dev->is_webcam) 1682 i->capabilities = 0; 1683 1684 /* Dynamically generates an audioset bitmask */ 1685 i->audioset = 0; 1686 for (j = 0; j < MAX_EM28XX_INPUT; j++) 1687 if (dev->amux_map[j] != EM28XX_AMUX_UNUSED) 1688 i->audioset |= 1 << j; 1689 1690 return 0; 1691 } 1692 1693 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 1694 { 1695 struct em28xx *dev = video_drvdata(file); 1696 1697 *i = dev->ctl_input; 1698 1699 return 0; 1700 } 1701 1702 static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 1703 { 1704 struct em28xx *dev = video_drvdata(file); 1705 1706 if (i >= MAX_EM28XX_INPUT) 1707 return -EINVAL; 1708 if (!INPUT(i)->type) 1709 return -EINVAL; 1710 1711 video_mux(dev, i); 1712 return 0; 1713 } 1714 1715 static int em28xx_fill_audio_input(struct em28xx *dev, 1716 const char *s, 1717 struct v4l2_audio *a, 1718 unsigned int index) 1719 { 1720 unsigned int idx = dev->amux_map[index]; 1721 1722 /* 1723 * With msp3400, almost all mappings use the default (amux = 0). 1724 * The only one may use a different value is WinTV USB2, where it 1725 * can also be SCART1 input. 1726 * As it is very doubtful that we would see new boards with msp3400, 1727 * let's just reuse the existing switch. 1728 */ 1729 if (dev->has_msp34xx && idx != EM28XX_AMUX_UNUSED) 1730 idx = EM28XX_AMUX_LINE_IN; 1731 1732 switch (idx) { 1733 case EM28XX_AMUX_VIDEO: 1734 strscpy(a->name, "Television", sizeof(a->name)); 1735 break; 1736 case EM28XX_AMUX_LINE_IN: 1737 strscpy(a->name, "Line In", sizeof(a->name)); 1738 break; 1739 case EM28XX_AMUX_VIDEO2: 1740 strscpy(a->name, "Television alt", sizeof(a->name)); 1741 break; 1742 case EM28XX_AMUX_PHONE: 1743 strscpy(a->name, "Phone", sizeof(a->name)); 1744 break; 1745 case EM28XX_AMUX_MIC: 1746 strscpy(a->name, "Mic", sizeof(a->name)); 1747 break; 1748 case EM28XX_AMUX_CD: 1749 strscpy(a->name, "CD", sizeof(a->name)); 1750 break; 1751 case EM28XX_AMUX_AUX: 1752 strscpy(a->name, "Aux", sizeof(a->name)); 1753 break; 1754 case EM28XX_AMUX_PCM_OUT: 1755 strscpy(a->name, "PCM", sizeof(a->name)); 1756 break; 1757 case EM28XX_AMUX_UNUSED: 1758 default: 1759 return -EINVAL; 1760 } 1761 a->index = index; 1762 a->capability = V4L2_AUDCAP_STEREO; 1763 1764 em28xx_videodbg("%s: audio input index %d is '%s'\n", 1765 s, a->index, a->name); 1766 1767 return 0; 1768 } 1769 1770 static int vidioc_enumaudio(struct file *file, void *fh, struct v4l2_audio *a) 1771 { 1772 struct em28xx *dev = video_drvdata(file); 1773 1774 if (a->index >= MAX_EM28XX_INPUT) 1775 return -EINVAL; 1776 1777 return em28xx_fill_audio_input(dev, __func__, a, a->index); 1778 } 1779 1780 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a) 1781 { 1782 struct em28xx *dev = video_drvdata(file); 1783 int i; 1784 1785 for (i = 0; i < MAX_EM28XX_INPUT; i++) 1786 if (dev->ctl_ainput == dev->amux_map[i]) 1787 return em28xx_fill_audio_input(dev, __func__, a, i); 1788 1789 /* Should never happen! */ 1790 return -EINVAL; 1791 } 1792 1793 static int vidioc_s_audio(struct file *file, void *priv, 1794 const struct v4l2_audio *a) 1795 { 1796 struct em28xx *dev = video_drvdata(file); 1797 int idx, i; 1798 1799 if (a->index >= MAX_EM28XX_INPUT) 1800 return -EINVAL; 1801 1802 idx = dev->amux_map[a->index]; 1803 1804 if (idx == EM28XX_AMUX_UNUSED) 1805 return -EINVAL; 1806 1807 dev->ctl_ainput = idx; 1808 1809 /* 1810 * FIXME: This is wrong, as different inputs at em28xx_cards 1811 * may have different audio outputs. So, the right thing 1812 * to do is to implement VIDIOC_G_AUDOUT/VIDIOC_S_AUDOUT. 1813 * With the current board definitions, this would work fine, 1814 * as, currently, all boards fit. 1815 */ 1816 for (i = 0; i < MAX_EM28XX_INPUT; i++) 1817 if (idx == dev->amux_map[i]) 1818 break; 1819 if (i == MAX_EM28XX_INPUT) 1820 return -EINVAL; 1821 1822 dev->ctl_aoutput = INPUT(i)->aout; 1823 1824 if (!dev->ctl_aoutput) 1825 dev->ctl_aoutput = EM28XX_AOUT_MASTER; 1826 1827 em28xx_videodbg("%s: set audio input to %d\n", __func__, 1828 dev->ctl_ainput); 1829 1830 return 0; 1831 } 1832 1833 static int vidioc_g_tuner(struct file *file, void *priv, 1834 struct v4l2_tuner *t) 1835 { 1836 struct em28xx *dev = video_drvdata(file); 1837 1838 if (t->index != 0) 1839 return -EINVAL; 1840 1841 strscpy(t->name, "Tuner", sizeof(t->name)); 1842 1843 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t); 1844 return 0; 1845 } 1846 1847 static int vidioc_s_tuner(struct file *file, void *priv, 1848 const struct v4l2_tuner *t) 1849 { 1850 struct em28xx *dev = video_drvdata(file); 1851 1852 if (t->index != 0) 1853 return -EINVAL; 1854 1855 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t); 1856 return 0; 1857 } 1858 1859 static int vidioc_g_frequency(struct file *file, void *priv, 1860 struct v4l2_frequency *f) 1861 { 1862 struct em28xx *dev = video_drvdata(file); 1863 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1864 1865 if (f->tuner != 0) 1866 return -EINVAL; 1867 1868 f->frequency = v4l2->frequency; 1869 return 0; 1870 } 1871 1872 static int vidioc_s_frequency(struct file *file, void *priv, 1873 const struct v4l2_frequency *f) 1874 { 1875 struct v4l2_frequency new_freq = *f; 1876 struct em28xx *dev = video_drvdata(file); 1877 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1878 1879 if (f->tuner != 0) 1880 return -EINVAL; 1881 1882 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_frequency, f); 1883 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, g_frequency, &new_freq); 1884 v4l2->frequency = new_freq.frequency; 1885 1886 return 0; 1887 } 1888 1889 #ifdef CONFIG_VIDEO_ADV_DEBUG 1890 static int vidioc_g_chip_info(struct file *file, void *priv, 1891 struct v4l2_dbg_chip_info *chip) 1892 { 1893 struct em28xx *dev = video_drvdata(file); 1894 1895 if (chip->match.addr > 1) 1896 return -EINVAL; 1897 if (chip->match.addr == 1) 1898 strscpy(chip->name, "ac97", sizeof(chip->name)); 1899 else 1900 strscpy(chip->name, 1901 dev->v4l2->v4l2_dev.name, sizeof(chip->name)); 1902 return 0; 1903 } 1904 1905 static int em28xx_reg_len(int reg) 1906 { 1907 switch (reg) { 1908 case EM28XX_R40_AC97LSB: 1909 case EM28XX_R30_HSCALELOW: 1910 case EM28XX_R32_VSCALELOW: 1911 return 2; 1912 default: 1913 return 1; 1914 } 1915 } 1916 1917 static int vidioc_g_register(struct file *file, void *priv, 1918 struct v4l2_dbg_register *reg) 1919 { 1920 struct em28xx *dev = video_drvdata(file); 1921 int ret; 1922 1923 if (reg->match.addr > 1) 1924 return -EINVAL; 1925 if (reg->match.addr) { 1926 ret = em28xx_read_ac97(dev, reg->reg); 1927 if (ret < 0) 1928 return ret; 1929 1930 reg->val = ret; 1931 reg->size = 1; 1932 return 0; 1933 } 1934 1935 /* Match host */ 1936 reg->size = em28xx_reg_len(reg->reg); 1937 if (reg->size == 1) { 1938 ret = em28xx_read_reg(dev, reg->reg); 1939 1940 if (ret < 0) 1941 return ret; 1942 1943 reg->val = ret; 1944 } else { 1945 __le16 val = 0; 1946 1947 ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS, 1948 reg->reg, (char *)&val, 2); 1949 if (ret < 0) 1950 return ret; 1951 1952 reg->val = le16_to_cpu(val); 1953 } 1954 1955 return 0; 1956 } 1957 1958 static int vidioc_s_register(struct file *file, void *priv, 1959 const struct v4l2_dbg_register *reg) 1960 { 1961 struct em28xx *dev = video_drvdata(file); 1962 __le16 buf; 1963 1964 if (reg->match.addr > 1) 1965 return -EINVAL; 1966 if (reg->match.addr) 1967 return em28xx_write_ac97(dev, reg->reg, reg->val); 1968 1969 /* Match host */ 1970 buf = cpu_to_le16(reg->val); 1971 1972 return em28xx_write_regs(dev, reg->reg, (char *)&buf, 1973 em28xx_reg_len(reg->reg)); 1974 } 1975 #endif 1976 1977 static int vidioc_querycap(struct file *file, void *priv, 1978 struct v4l2_capability *cap) 1979 { 1980 struct em28xx *dev = video_drvdata(file); 1981 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1982 struct usb_device *udev = interface_to_usbdev(dev->intf); 1983 1984 strscpy(cap->driver, "em28xx", sizeof(cap->driver)); 1985 strscpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); 1986 usb_make_path(udev, cap->bus_info, sizeof(cap->bus_info)); 1987 1988 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_READWRITE | 1989 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; 1990 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE) 1991 cap->capabilities |= V4L2_CAP_AUDIO; 1992 if (dev->tuner_type != TUNER_ABSENT) 1993 cap->capabilities |= V4L2_CAP_TUNER; 1994 if (video_is_registered(&v4l2->vbi_dev)) 1995 cap->capabilities |= V4L2_CAP_VBI_CAPTURE; 1996 if (video_is_registered(&v4l2->radio_dev)) 1997 cap->capabilities |= V4L2_CAP_RADIO; 1998 return 0; 1999 } 2000 2001 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 2002 struct v4l2_fmtdesc *f) 2003 { 2004 if (unlikely(f->index >= ARRAY_SIZE(format))) 2005 return -EINVAL; 2006 2007 f->pixelformat = format[f->index].fourcc; 2008 2009 return 0; 2010 } 2011 2012 static int vidioc_enum_framesizes(struct file *file, void *priv, 2013 struct v4l2_frmsizeenum *fsize) 2014 { 2015 struct em28xx *dev = video_drvdata(file); 2016 struct em28xx_fmt *fmt; 2017 unsigned int maxw = norm_maxw(dev); 2018 unsigned int maxh = norm_maxh(dev); 2019 2020 fmt = format_by_fourcc(fsize->pixel_format); 2021 if (!fmt) { 2022 em28xx_videodbg("Fourcc format (%08x) invalid.\n", 2023 fsize->pixel_format); 2024 return -EINVAL; 2025 } 2026 2027 if (dev->board.is_em2800) { 2028 if (fsize->index > 1) 2029 return -EINVAL; 2030 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 2031 fsize->discrete.width = maxw / (1 + fsize->index); 2032 fsize->discrete.height = maxh / (1 + fsize->index); 2033 return 0; 2034 } 2035 2036 if (fsize->index != 0) 2037 return -EINVAL; 2038 2039 /* Report a continuous range */ 2040 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; 2041 scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX, 2042 &fsize->stepwise.min_width, &fsize->stepwise.min_height); 2043 if (fsize->stepwise.min_width < 48) 2044 fsize->stepwise.min_width = 48; 2045 if (fsize->stepwise.min_height < 38) 2046 fsize->stepwise.min_height = 38; 2047 fsize->stepwise.max_width = maxw; 2048 fsize->stepwise.max_height = maxh; 2049 fsize->stepwise.step_width = 1; 2050 fsize->stepwise.step_height = 1; 2051 return 0; 2052 } 2053 2054 /* RAW VBI ioctls */ 2055 2056 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv, 2057 struct v4l2_format *format) 2058 { 2059 struct em28xx *dev = video_drvdata(file); 2060 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2061 2062 format->fmt.vbi.samples_per_line = v4l2->vbi_width; 2063 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; 2064 format->fmt.vbi.offset = 0; 2065 format->fmt.vbi.flags = 0; 2066 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; 2067 format->fmt.vbi.count[0] = v4l2->vbi_height; 2068 format->fmt.vbi.count[1] = v4l2->vbi_height; 2069 memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved)); 2070 2071 /* Varies by video standard (NTSC, PAL, etc.) */ 2072 if (v4l2->norm & V4L2_STD_525_60) { 2073 /* NTSC */ 2074 format->fmt.vbi.start[0] = 10; 2075 format->fmt.vbi.start[1] = 273; 2076 } else if (v4l2->norm & V4L2_STD_625_50) { 2077 /* PAL */ 2078 format->fmt.vbi.start[0] = 6; 2079 format->fmt.vbi.start[1] = 318; 2080 } 2081 2082 return 0; 2083 } 2084 2085 /* 2086 * RADIO ESPECIFIC IOCTLS 2087 */ 2088 2089 static int radio_g_tuner(struct file *file, void *priv, 2090 struct v4l2_tuner *t) 2091 { 2092 struct em28xx *dev = video_drvdata(file); 2093 2094 if (unlikely(t->index > 0)) 2095 return -EINVAL; 2096 2097 strscpy(t->name, "Radio", sizeof(t->name)); 2098 2099 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t); 2100 2101 return 0; 2102 } 2103 2104 static int radio_s_tuner(struct file *file, void *priv, 2105 const struct v4l2_tuner *t) 2106 { 2107 struct em28xx *dev = video_drvdata(file); 2108 2109 if (t->index != 0) 2110 return -EINVAL; 2111 2112 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t); 2113 2114 return 0; 2115 } 2116 2117 /* 2118 * em28xx_free_v4l2() - Free struct em28xx_v4l2 2119 * 2120 * @ref: struct kref for struct em28xx_v4l2 2121 * 2122 * Called when all users of struct em28xx_v4l2 are gone 2123 */ 2124 static void em28xx_free_v4l2(struct kref *ref) 2125 { 2126 struct em28xx_v4l2 *v4l2 = container_of(ref, struct em28xx_v4l2, ref); 2127 2128 v4l2->dev->v4l2 = NULL; 2129 kfree(v4l2); 2130 } 2131 2132 /* 2133 * em28xx_v4l2_open() 2134 * inits the device and starts isoc transfer 2135 */ 2136 static int em28xx_v4l2_open(struct file *filp) 2137 { 2138 struct video_device *vdev = video_devdata(filp); 2139 struct em28xx *dev = video_drvdata(filp); 2140 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2141 enum v4l2_buf_type fh_type = 0; 2142 int ret; 2143 2144 switch (vdev->vfl_type) { 2145 case VFL_TYPE_GRABBER: 2146 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2147 break; 2148 case VFL_TYPE_VBI: 2149 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE; 2150 break; 2151 case VFL_TYPE_RADIO: 2152 break; 2153 default: 2154 return -EINVAL; 2155 } 2156 2157 em28xx_videodbg("open dev=%s type=%s users=%d\n", 2158 video_device_node_name(vdev), v4l2_type_names[fh_type], 2159 v4l2->users); 2160 2161 if (mutex_lock_interruptible(&dev->lock)) 2162 return -ERESTARTSYS; 2163 2164 ret = v4l2_fh_open(filp); 2165 if (ret) { 2166 dev_err(&dev->intf->dev, 2167 "%s: v4l2_fh_open() returned error %d\n", 2168 __func__, ret); 2169 mutex_unlock(&dev->lock); 2170 return ret; 2171 } 2172 2173 if (v4l2->users == 0) { 2174 em28xx_set_mode(dev, EM28XX_ANALOG_MODE); 2175 2176 if (vdev->vfl_type != VFL_TYPE_RADIO) 2177 em28xx_resolution_set(dev); 2178 2179 /* 2180 * Needed, since GPIO might have disabled power 2181 * of some i2c devices 2182 */ 2183 em28xx_wake_i2c(dev); 2184 } 2185 2186 if (vdev->vfl_type == VFL_TYPE_RADIO) { 2187 em28xx_videodbg("video_open: setting radio device\n"); 2188 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_radio); 2189 } 2190 2191 kref_get(&dev->ref); 2192 kref_get(&v4l2->ref); 2193 v4l2->users++; 2194 2195 mutex_unlock(&dev->lock); 2196 2197 return 0; 2198 } 2199 2200 /* 2201 * em28xx_v4l2_fini() 2202 * unregisters the v4l2,i2c and usb devices 2203 * called when the device gets disconected or at module unload 2204 */ 2205 static int em28xx_v4l2_fini(struct em28xx *dev) 2206 { 2207 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2208 2209 if (dev->is_audio_only) { 2210 /* Shouldn't initialize IR for this interface */ 2211 return 0; 2212 } 2213 2214 if (!dev->has_video) { 2215 /* This device does not support the v4l2 extension */ 2216 return 0; 2217 } 2218 2219 if (!v4l2) 2220 return 0; 2221 2222 dev_info(&dev->intf->dev, "Closing video extension\n"); 2223 2224 mutex_lock(&dev->lock); 2225 2226 v4l2_device_disconnect(&v4l2->v4l2_dev); 2227 2228 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); 2229 2230 em28xx_v4l2_media_release(dev); 2231 2232 if (video_is_registered(&v4l2->radio_dev)) { 2233 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n", 2234 video_device_node_name(&v4l2->radio_dev)); 2235 video_unregister_device(&v4l2->radio_dev); 2236 } 2237 if (video_is_registered(&v4l2->vbi_dev)) { 2238 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n", 2239 video_device_node_name(&v4l2->vbi_dev)); 2240 video_unregister_device(&v4l2->vbi_dev); 2241 } 2242 if (video_is_registered(&v4l2->vdev)) { 2243 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n", 2244 video_device_node_name(&v4l2->vdev)); 2245 video_unregister_device(&v4l2->vdev); 2246 } 2247 2248 v4l2_ctrl_handler_free(&v4l2->ctrl_handler); 2249 v4l2_device_unregister(&v4l2->v4l2_dev); 2250 2251 kref_put(&v4l2->ref, em28xx_free_v4l2); 2252 2253 mutex_unlock(&dev->lock); 2254 2255 kref_put(&dev->ref, em28xx_free_device); 2256 2257 return 0; 2258 } 2259 2260 static int em28xx_v4l2_suspend(struct em28xx *dev) 2261 { 2262 if (dev->is_audio_only) 2263 return 0; 2264 2265 if (!dev->has_video) 2266 return 0; 2267 2268 dev_info(&dev->intf->dev, "Suspending video extension\n"); 2269 em28xx_stop_urbs(dev); 2270 return 0; 2271 } 2272 2273 static int em28xx_v4l2_resume(struct em28xx *dev) 2274 { 2275 if (dev->is_audio_only) 2276 return 0; 2277 2278 if (!dev->has_video) 2279 return 0; 2280 2281 dev_info(&dev->intf->dev, "Resuming video extension\n"); 2282 /* what do we do here */ 2283 return 0; 2284 } 2285 2286 /* 2287 * em28xx_v4l2_close() 2288 * stops streaming and deallocates all resources allocated by the v4l2 2289 * calls and ioctls 2290 */ 2291 static int em28xx_v4l2_close(struct file *filp) 2292 { 2293 struct em28xx *dev = video_drvdata(filp); 2294 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2295 struct usb_device *udev = interface_to_usbdev(dev->intf); 2296 int err; 2297 2298 em28xx_videodbg("users=%d\n", v4l2->users); 2299 2300 vb2_fop_release(filp); 2301 mutex_lock(&dev->lock); 2302 2303 if (v4l2->users == 1) { 2304 /* No sense to try to write to the device */ 2305 if (dev->disconnected) 2306 goto exit; 2307 2308 /* Save some power by putting tuner to sleep */ 2309 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby); 2310 2311 /* do this before setting alternate! */ 2312 em28xx_set_mode(dev, EM28XX_SUSPEND); 2313 2314 /* set alternate 0 */ 2315 dev->alt = 0; 2316 em28xx_videodbg("setting alternate 0\n"); 2317 err = usb_set_interface(udev, 0, 0); 2318 if (err < 0) { 2319 dev_err(&dev->intf->dev, 2320 "cannot change alternate number to 0 (error=%i)\n", 2321 err); 2322 } 2323 } 2324 2325 exit: 2326 v4l2->users--; 2327 kref_put(&v4l2->ref, em28xx_free_v4l2); 2328 mutex_unlock(&dev->lock); 2329 kref_put(&dev->ref, em28xx_free_device); 2330 2331 return 0; 2332 } 2333 2334 static const struct v4l2_file_operations em28xx_v4l_fops = { 2335 .owner = THIS_MODULE, 2336 .open = em28xx_v4l2_open, 2337 .release = em28xx_v4l2_close, 2338 .read = vb2_fop_read, 2339 .poll = vb2_fop_poll, 2340 .mmap = vb2_fop_mmap, 2341 .unlocked_ioctl = video_ioctl2, 2342 }; 2343 2344 static const struct v4l2_ioctl_ops video_ioctl_ops = { 2345 .vidioc_querycap = vidioc_querycap, 2346 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 2347 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 2348 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 2349 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 2350 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2351 .vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2352 .vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2353 .vidioc_enum_framesizes = vidioc_enum_framesizes, 2354 .vidioc_enumaudio = vidioc_enumaudio, 2355 .vidioc_g_audio = vidioc_g_audio, 2356 .vidioc_s_audio = vidioc_s_audio, 2357 2358 .vidioc_reqbufs = vb2_ioctl_reqbufs, 2359 .vidioc_create_bufs = vb2_ioctl_create_bufs, 2360 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 2361 .vidioc_querybuf = vb2_ioctl_querybuf, 2362 .vidioc_qbuf = vb2_ioctl_qbuf, 2363 .vidioc_dqbuf = vb2_ioctl_dqbuf, 2364 2365 .vidioc_g_std = vidioc_g_std, 2366 .vidioc_querystd = vidioc_querystd, 2367 .vidioc_s_std = vidioc_s_std, 2368 .vidioc_g_parm = vidioc_g_parm, 2369 .vidioc_s_parm = vidioc_s_parm, 2370 .vidioc_enum_input = vidioc_enum_input, 2371 .vidioc_g_input = vidioc_g_input, 2372 .vidioc_s_input = vidioc_s_input, 2373 .vidioc_streamon = vb2_ioctl_streamon, 2374 .vidioc_streamoff = vb2_ioctl_streamoff, 2375 .vidioc_g_tuner = vidioc_g_tuner, 2376 .vidioc_s_tuner = vidioc_s_tuner, 2377 .vidioc_g_frequency = vidioc_g_frequency, 2378 .vidioc_s_frequency = vidioc_s_frequency, 2379 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 2380 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 2381 #ifdef CONFIG_VIDEO_ADV_DEBUG 2382 .vidioc_g_chip_info = vidioc_g_chip_info, 2383 .vidioc_g_register = vidioc_g_register, 2384 .vidioc_s_register = vidioc_s_register, 2385 #endif 2386 }; 2387 2388 static const struct video_device em28xx_video_template = { 2389 .fops = &em28xx_v4l_fops, 2390 .ioctl_ops = &video_ioctl_ops, 2391 .release = video_device_release_empty, 2392 .tvnorms = V4L2_STD_ALL, 2393 }; 2394 2395 static const struct v4l2_file_operations radio_fops = { 2396 .owner = THIS_MODULE, 2397 .open = em28xx_v4l2_open, 2398 .release = em28xx_v4l2_close, 2399 .unlocked_ioctl = video_ioctl2, 2400 }; 2401 2402 static const struct v4l2_ioctl_ops radio_ioctl_ops = { 2403 .vidioc_querycap = vidioc_querycap, 2404 .vidioc_g_tuner = radio_g_tuner, 2405 .vidioc_s_tuner = radio_s_tuner, 2406 .vidioc_g_frequency = vidioc_g_frequency, 2407 .vidioc_s_frequency = vidioc_s_frequency, 2408 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 2409 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 2410 #ifdef CONFIG_VIDEO_ADV_DEBUG 2411 .vidioc_g_chip_info = vidioc_g_chip_info, 2412 .vidioc_g_register = vidioc_g_register, 2413 .vidioc_s_register = vidioc_s_register, 2414 #endif 2415 }; 2416 2417 static struct video_device em28xx_radio_template = { 2418 .fops = &radio_fops, 2419 .ioctl_ops = &radio_ioctl_ops, 2420 .release = video_device_release_empty, 2421 }; 2422 2423 /* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */ 2424 static unsigned short saa711x_addrs[] = { 2425 0x4a >> 1, 0x48 >> 1, /* SAA7111, SAA7111A and SAA7113 */ 2426 0x42 >> 1, 0x40 >> 1, /* SAA7114, SAA7115 and SAA7118 */ 2427 I2C_CLIENT_END }; 2428 2429 static unsigned short tvp5150_addrs[] = { 2430 0xb8 >> 1, 2431 0xba >> 1, 2432 I2C_CLIENT_END 2433 }; 2434 2435 static unsigned short msp3400_addrs[] = { 2436 0x80 >> 1, 2437 0x88 >> 1, 2438 I2C_CLIENT_END 2439 }; 2440 2441 /******************************** usb interface ******************************/ 2442 2443 static void em28xx_vdev_init(struct em28xx *dev, 2444 struct video_device *vfd, 2445 const struct video_device *template, 2446 const char *type_name) 2447 { 2448 *vfd = *template; 2449 vfd->v4l2_dev = &dev->v4l2->v4l2_dev; 2450 vfd->lock = &dev->lock; 2451 if (dev->is_webcam) 2452 vfd->tvnorms = 0; 2453 2454 snprintf(vfd->name, sizeof(vfd->name), "%s %s", 2455 dev_name(&dev->intf->dev), type_name); 2456 2457 video_set_drvdata(vfd, dev); 2458 } 2459 2460 static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr) 2461 { 2462 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2463 struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev; 2464 struct tuner_setup tun_setup; 2465 struct v4l2_frequency f; 2466 2467 memset(&tun_setup, 0, sizeof(tun_setup)); 2468 2469 tun_setup.mode_mask = T_ANALOG_TV | T_RADIO; 2470 tun_setup.tuner_callback = em28xx_tuner_callback; 2471 2472 if (dev->board.radio.type) { 2473 tun_setup.type = dev->board.radio.type; 2474 tun_setup.addr = dev->board.radio_addr; 2475 2476 v4l2_device_call_all(v4l2_dev, 2477 0, tuner, s_type_addr, &tun_setup); 2478 } 2479 2480 if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type) { 2481 tun_setup.type = dev->tuner_type; 2482 tun_setup.addr = tuner_addr; 2483 2484 v4l2_device_call_all(v4l2_dev, 2485 0, tuner, s_type_addr, &tun_setup); 2486 } 2487 2488 if (dev->board.tda9887_conf) { 2489 struct v4l2_priv_tun_config tda9887_cfg; 2490 2491 tda9887_cfg.tuner = TUNER_TDA9887; 2492 tda9887_cfg.priv = &dev->board.tda9887_conf; 2493 2494 v4l2_device_call_all(v4l2_dev, 2495 0, tuner, s_config, &tda9887_cfg); 2496 } 2497 2498 if (dev->tuner_type == TUNER_XC2028) { 2499 struct v4l2_priv_tun_config xc2028_cfg; 2500 struct xc2028_ctrl ctl; 2501 2502 memset(&xc2028_cfg, 0, sizeof(xc2028_cfg)); 2503 memset(&ctl, 0, sizeof(ctl)); 2504 2505 em28xx_setup_xc3028(dev, &ctl); 2506 2507 xc2028_cfg.tuner = TUNER_XC2028; 2508 xc2028_cfg.priv = &ctl; 2509 2510 v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg); 2511 } 2512 2513 /* configure tuner */ 2514 f.tuner = 0; 2515 f.type = V4L2_TUNER_ANALOG_TV; 2516 f.frequency = 9076; /* just a magic number */ 2517 v4l2->frequency = f.frequency; 2518 v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency, &f); 2519 } 2520 2521 static int em28xx_v4l2_init(struct em28xx *dev) 2522 { 2523 u8 val; 2524 int ret; 2525 unsigned int maxw; 2526 struct v4l2_ctrl_handler *hdl; 2527 struct em28xx_v4l2 *v4l2; 2528 2529 if (dev->is_audio_only) { 2530 /* Shouldn't initialize IR for this interface */ 2531 return 0; 2532 } 2533 2534 if (!dev->has_video) { 2535 /* This device does not support the v4l2 extension */ 2536 return 0; 2537 } 2538 2539 dev_info(&dev->intf->dev, "Registering V4L2 extension\n"); 2540 2541 mutex_lock(&dev->lock); 2542 2543 v4l2 = kzalloc(sizeof(*v4l2), GFP_KERNEL); 2544 if (!v4l2) { 2545 mutex_unlock(&dev->lock); 2546 return -ENOMEM; 2547 } 2548 kref_init(&v4l2->ref); 2549 v4l2->dev = dev; 2550 dev->v4l2 = v4l2; 2551 2552 #ifdef CONFIG_MEDIA_CONTROLLER 2553 v4l2->v4l2_dev.mdev = dev->media_dev; 2554 #endif 2555 ret = v4l2_device_register(&dev->intf->dev, &v4l2->v4l2_dev); 2556 if (ret < 0) { 2557 dev_err(&dev->intf->dev, 2558 "Call to v4l2_device_register() failed!\n"); 2559 goto err; 2560 } 2561 2562 hdl = &v4l2->ctrl_handler; 2563 v4l2_ctrl_handler_init(hdl, 8); 2564 v4l2->v4l2_dev.ctrl_handler = hdl; 2565 2566 if (dev->is_webcam) 2567 v4l2->progressive = true; 2568 2569 /* 2570 * Default format, used for tvp5150 or saa711x output formats 2571 */ 2572 v4l2->vinmode = EM28XX_VINMODE_YUV422_CbYCrY; 2573 v4l2->vinctl = EM28XX_VINCTRL_INTERLACED | 2574 EM28XX_VINCTRL_CCIR656_ENABLE; 2575 2576 /* request some modules */ 2577 2578 if (dev->has_msp34xx) 2579 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2580 &dev->i2c_adap[dev->def_i2c_bus], 2581 "msp3400", 0, msp3400_addrs); 2582 2583 if (dev->board.decoder == EM28XX_SAA711X) 2584 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2585 &dev->i2c_adap[dev->def_i2c_bus], 2586 "saa7115_auto", 0, saa711x_addrs); 2587 2588 if (dev->board.decoder == EM28XX_TVP5150) 2589 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2590 &dev->i2c_adap[dev->def_i2c_bus], 2591 "tvp5150", 0, tvp5150_addrs); 2592 2593 if (dev->board.adecoder == EM28XX_TVAUDIO) 2594 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2595 &dev->i2c_adap[dev->def_i2c_bus], 2596 "tvaudio", dev->board.tvaudio_addr, NULL); 2597 2598 /* Initialize tuner and camera */ 2599 2600 if (dev->board.tuner_type != TUNER_ABSENT) { 2601 unsigned short tuner_addr = dev->board.tuner_addr; 2602 int has_demod = (dev->board.tda9887_conf & TDA9887_PRESENT); 2603 2604 if (dev->board.radio.type) 2605 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2606 &dev->i2c_adap[dev->def_i2c_bus], 2607 "tuner", dev->board.radio_addr, 2608 NULL); 2609 2610 if (has_demod) 2611 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2612 &dev->i2c_adap[dev->def_i2c_bus], 2613 "tuner", 0, 2614 v4l2_i2c_tuner_addrs(ADDRS_DEMOD)); 2615 if (tuner_addr == 0) { 2616 enum v4l2_i2c_tuner_type type = 2617 has_demod ? ADDRS_TV_WITH_DEMOD : ADDRS_TV; 2618 struct v4l2_subdev *sd; 2619 2620 sd = v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2621 &dev->i2c_adap[dev->def_i2c_bus], 2622 "tuner", 0, 2623 v4l2_i2c_tuner_addrs(type)); 2624 2625 if (sd) 2626 tuner_addr = v4l2_i2c_subdev_addr(sd); 2627 } else { 2628 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2629 &dev->i2c_adap[dev->def_i2c_bus], 2630 "tuner", tuner_addr, NULL); 2631 } 2632 2633 em28xx_tuner_setup(dev, tuner_addr); 2634 } 2635 2636 if (dev->em28xx_sensor != EM28XX_NOSENSOR) 2637 em28xx_init_camera(dev); 2638 2639 /* Configure audio */ 2640 ret = em28xx_audio_setup(dev); 2641 if (ret < 0) { 2642 dev_err(&dev->intf->dev, 2643 "%s: Error while setting audio - error [%d]!\n", 2644 __func__, ret); 2645 goto unregister_dev; 2646 } 2647 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) { 2648 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2649 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); 2650 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2651 V4L2_CID_AUDIO_VOLUME, 0, 0x1f, 1, 0x1f); 2652 } else { 2653 /* install the em28xx notify callback */ 2654 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_MUTE), 2655 em28xx_ctrl_notify, dev); 2656 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_VOLUME), 2657 em28xx_ctrl_notify, dev); 2658 } 2659 2660 /* wake i2c devices */ 2661 em28xx_wake_i2c(dev); 2662 2663 /* init video dma queues */ 2664 INIT_LIST_HEAD(&dev->vidq.active); 2665 INIT_LIST_HEAD(&dev->vbiq.active); 2666 2667 if (dev->has_msp34xx) { 2668 /* Send a reset to other chips via gpio */ 2669 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xf7); 2670 if (ret < 0) { 2671 dev_err(&dev->intf->dev, 2672 "%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n", 2673 __func__, ret); 2674 goto unregister_dev; 2675 } 2676 usleep_range(10000, 11000); 2677 2678 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xff); 2679 if (ret < 0) { 2680 dev_err(&dev->intf->dev, 2681 "%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n", 2682 __func__, ret); 2683 goto unregister_dev; 2684 } 2685 usleep_range(10000, 11000); 2686 } 2687 2688 /* set default norm */ 2689 v4l2->norm = V4L2_STD_PAL; 2690 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm); 2691 v4l2->interlaced_fieldmode = EM28XX_INTERLACED_DEFAULT; 2692 2693 /* Analog specific initialization */ 2694 v4l2->format = &format[0]; 2695 2696 maxw = norm_maxw(dev); 2697 /* 2698 * MaxPacketSize for em2800 is too small to capture at full resolution 2699 * use half of maxw as the scaler can only scale to 50% 2700 */ 2701 if (dev->board.is_em2800) 2702 maxw /= 2; 2703 2704 em28xx_set_video_format(dev, format[0].fourcc, 2705 maxw, norm_maxh(dev)); 2706 2707 video_mux(dev, 0); 2708 2709 /* Audio defaults */ 2710 dev->mute = 1; 2711 dev->volume = 0x1f; 2712 2713 /* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */ 2714 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK); 2715 em28xx_write_reg(dev, EM28XX_R0F_XCLK, 2716 (EM28XX_XCLK_AUDIO_UNMUTE | val)); 2717 2718 em28xx_set_outfmt(dev); 2719 2720 /* Add image controls */ 2721 2722 /* 2723 * NOTE: at this point, the subdevices are already registered, so 2724 * bridge controls are only added/enabled when no subdevice provides 2725 * them 2726 */ 2727 if (!v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST)) 2728 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2729 V4L2_CID_CONTRAST, 2730 0, 0x1f, 1, CONTRAST_DEFAULT); 2731 if (!v4l2_ctrl_find(hdl, V4L2_CID_BRIGHTNESS)) 2732 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2733 V4L2_CID_BRIGHTNESS, 2734 -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT); 2735 if (!v4l2_ctrl_find(hdl, V4L2_CID_SATURATION)) 2736 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2737 V4L2_CID_SATURATION, 2738 0, 0x1f, 1, SATURATION_DEFAULT); 2739 if (!v4l2_ctrl_find(hdl, V4L2_CID_BLUE_BALANCE)) 2740 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2741 V4L2_CID_BLUE_BALANCE, 2742 -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT); 2743 if (!v4l2_ctrl_find(hdl, V4L2_CID_RED_BALANCE)) 2744 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2745 V4L2_CID_RED_BALANCE, 2746 -0x30, 0x30, 1, RED_BALANCE_DEFAULT); 2747 if (!v4l2_ctrl_find(hdl, V4L2_CID_SHARPNESS)) 2748 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2749 V4L2_CID_SHARPNESS, 2750 0, 0x0f, 1, SHARPNESS_DEFAULT); 2751 2752 /* Reset image controls */ 2753 em28xx_colorlevels_set_default(dev); 2754 v4l2_ctrl_handler_setup(hdl); 2755 ret = hdl->error; 2756 if (ret) 2757 goto unregister_dev; 2758 2759 /* allocate and fill video video_device struct */ 2760 em28xx_vdev_init(dev, &v4l2->vdev, &em28xx_video_template, "video"); 2761 mutex_init(&v4l2->vb_queue_lock); 2762 mutex_init(&v4l2->vb_vbi_queue_lock); 2763 v4l2->vdev.queue = &v4l2->vb_vidq; 2764 v4l2->vdev.queue->lock = &v4l2->vb_queue_lock; 2765 v4l2->vdev.device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VIDEO_CAPTURE | 2766 V4L2_CAP_STREAMING; 2767 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE) 2768 v4l2->vdev.device_caps |= V4L2_CAP_AUDIO; 2769 if (dev->tuner_type != TUNER_ABSENT) 2770 v4l2->vdev.device_caps |= V4L2_CAP_TUNER; 2771 2772 2773 /* disable inapplicable ioctls */ 2774 if (dev->is_webcam) { 2775 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_QUERYSTD); 2776 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_STD); 2777 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_STD); 2778 } else { 2779 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_PARM); 2780 } 2781 if (dev->tuner_type == TUNER_ABSENT) { 2782 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_TUNER); 2783 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_TUNER); 2784 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_FREQUENCY); 2785 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_FREQUENCY); 2786 } 2787 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) { 2788 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_AUDIO); 2789 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_AUDIO); 2790 } 2791 2792 /* register v4l2 video video_device */ 2793 ret = video_register_device(&v4l2->vdev, VFL_TYPE_GRABBER, 2794 video_nr[dev->devno]); 2795 if (ret) { 2796 dev_err(&dev->intf->dev, 2797 "unable to register video device (error=%i).\n", ret); 2798 goto unregister_dev; 2799 } 2800 2801 /* Allocate and fill vbi video_device struct */ 2802 if (em28xx_vbi_supported(dev) == 1) { 2803 em28xx_vdev_init(dev, &v4l2->vbi_dev, &em28xx_video_template, 2804 "vbi"); 2805 2806 v4l2->vbi_dev.queue = &v4l2->vb_vbiq; 2807 v4l2->vbi_dev.queue->lock = &v4l2->vb_vbi_queue_lock; 2808 v4l2->vbi_dev.device_caps = V4L2_CAP_STREAMING | 2809 V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE; 2810 if (dev->tuner_type != TUNER_ABSENT) 2811 v4l2->vbi_dev.device_caps |= V4L2_CAP_TUNER; 2812 2813 /* disable inapplicable ioctls */ 2814 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_PARM); 2815 if (dev->tuner_type == TUNER_ABSENT) { 2816 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_TUNER); 2817 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_TUNER); 2818 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_FREQUENCY); 2819 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_FREQUENCY); 2820 } 2821 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) { 2822 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_AUDIO); 2823 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_AUDIO); 2824 } 2825 2826 /* register v4l2 vbi video_device */ 2827 ret = video_register_device(&v4l2->vbi_dev, VFL_TYPE_VBI, 2828 vbi_nr[dev->devno]); 2829 if (ret < 0) { 2830 dev_err(&dev->intf->dev, 2831 "unable to register vbi device\n"); 2832 goto unregister_dev; 2833 } 2834 } 2835 2836 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) { 2837 em28xx_vdev_init(dev, &v4l2->radio_dev, &em28xx_radio_template, 2838 "radio"); 2839 v4l2->radio_dev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER; 2840 ret = video_register_device(&v4l2->radio_dev, VFL_TYPE_RADIO, 2841 radio_nr[dev->devno]); 2842 if (ret < 0) { 2843 dev_err(&dev->intf->dev, 2844 "can't register radio device\n"); 2845 goto unregister_dev; 2846 } 2847 dev_info(&dev->intf->dev, 2848 "Registered radio device as %s\n", 2849 video_device_node_name(&v4l2->radio_dev)); 2850 } 2851 2852 /* Init entities at the Media Controller */ 2853 em28xx_v4l2_create_entities(dev); 2854 2855 #ifdef CONFIG_MEDIA_CONTROLLER 2856 ret = v4l2_mc_create_media_graph(dev->media_dev); 2857 if (ret) { 2858 dev_err(&dev->intf->dev, 2859 "failed to create media graph\n"); 2860 em28xx_v4l2_media_release(dev); 2861 goto unregister_dev; 2862 } 2863 #endif 2864 2865 dev_info(&dev->intf->dev, 2866 "V4L2 video device registered as %s\n", 2867 video_device_node_name(&v4l2->vdev)); 2868 2869 if (video_is_registered(&v4l2->vbi_dev)) 2870 dev_info(&dev->intf->dev, 2871 "V4L2 VBI device registered as %s\n", 2872 video_device_node_name(&v4l2->vbi_dev)); 2873 2874 /* Save some power by putting tuner to sleep */ 2875 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby); 2876 2877 /* initialize videobuf2 stuff */ 2878 em28xx_vb2_setup(dev); 2879 2880 dev_info(&dev->intf->dev, 2881 "V4L2 extension successfully initialized\n"); 2882 2883 kref_get(&dev->ref); 2884 2885 mutex_unlock(&dev->lock); 2886 return 0; 2887 2888 unregister_dev: 2889 if (video_is_registered(&v4l2->radio_dev)) { 2890 dev_info(&dev->intf->dev, 2891 "V4L2 device %s deregistered\n", 2892 video_device_node_name(&v4l2->radio_dev)); 2893 video_unregister_device(&v4l2->radio_dev); 2894 } 2895 if (video_is_registered(&v4l2->vbi_dev)) { 2896 dev_info(&dev->intf->dev, 2897 "V4L2 device %s deregistered\n", 2898 video_device_node_name(&v4l2->vbi_dev)); 2899 video_unregister_device(&v4l2->vbi_dev); 2900 } 2901 if (video_is_registered(&v4l2->vdev)) { 2902 dev_info(&dev->intf->dev, 2903 "V4L2 device %s deregistered\n", 2904 video_device_node_name(&v4l2->vdev)); 2905 video_unregister_device(&v4l2->vdev); 2906 } 2907 2908 v4l2_ctrl_handler_free(&v4l2->ctrl_handler); 2909 v4l2_device_unregister(&v4l2->v4l2_dev); 2910 err: 2911 dev->v4l2 = NULL; 2912 kref_put(&v4l2->ref, em28xx_free_v4l2); 2913 mutex_unlock(&dev->lock); 2914 return ret; 2915 } 2916 2917 static struct em28xx_ops v4l2_ops = { 2918 .id = EM28XX_V4L2, 2919 .name = "Em28xx v4l2 Extension", 2920 .init = em28xx_v4l2_init, 2921 .fini = em28xx_v4l2_fini, 2922 .suspend = em28xx_v4l2_suspend, 2923 .resume = em28xx_v4l2_resume, 2924 }; 2925 2926 static int __init em28xx_video_register(void) 2927 { 2928 return em28xx_register_extension(&v4l2_ops); 2929 } 2930 2931 static void __exit em28xx_video_unregister(void) 2932 { 2933 em28xx_unregister_extension(&v4l2_ops); 2934 } 2935 2936 module_init(em28xx_video_register); 2937 module_exit(em28xx_video_unregister); 2938