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 50static unsigned int isoc_debug; 51module_param(isoc_debug, int, 0644); 52MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]"); 53 54static unsigned int disable_vbi; 55module_param(disable_vbi, int, 0644); 56MODULE_PARM_DESC(disable_vbi, "disable vbi support"); 57 58static int alt; 59module_param(alt, int, 0644); 60MODULE_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 74MODULE_AUTHOR(DRIVER_AUTHOR); 75MODULE_DESCRIPTION(DRIVER_DESC " - v4l2 interface"); 76MODULE_LICENSE("GPL v2"); 77MODULE_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 87static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; 88static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; 89static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; 90 91module_param_array(video_nr, int, NULL, 0444); 92module_param_array(vbi_nr, int, NULL, 0444); 93module_param_array(radio_nr, int, NULL, 0444); 94MODULE_PARM_DESC(video_nr, "video device numbers"); 95MODULE_PARM_DESC(vbi_nr, "vbi device numbers"); 96MODULE_PARM_DESC(radio_nr, "radio device numbers"); 97 98static unsigned int video_debug; 99module_param(video_debug, int, 0644); 100MODULE_PARM_DESC(video_debug, "enable debug messages [video]"); 101 102/* supported video standards */ 103static 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 */ 136static 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 149static 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 162static 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 */ 185static 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 194static 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 212static 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 257static 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 269static 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 296static 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 */ 323static 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 */ 358static 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 402set_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 */ 437static 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 */ 455static 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 */ 536static 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 555static 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 */ 597static 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 */ 620static struct em28xx_buffer * 621finish_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 */ 643static 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 */ 728static 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) */ 789static 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 850static 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 */ 864static 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 880static 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 888static 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 905static 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 964static 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 971static 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 1038static 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 1057static int 1058buffer_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 1079int 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 1147static 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 1182void 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 1217static void 1218buffer_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 1236static 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 1246static 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 1287static 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 1320static 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 1342static 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 1381static const struct v4l2_ctrl_ops em28xx_ctrl_ops = { 1382 .s_ctrl = em28xx_s_ctrl, 1383}; 1384 1385static 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 1401static 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 1422static 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 1444static 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 1455static 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 1514 return 0; 1515} 1516 1517static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc, 1518 unsigned int width, unsigned int height) 1519{ 1520 struct em28xx_fmt *fmt; 1521 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1522 1523 fmt = format_by_fourcc(fourcc); 1524 if (!fmt) 1525 return -EINVAL; 1526 1527 v4l2->format = fmt; 1528 v4l2->width = width; 1529 v4l2->height = height; 1530 1531 /* set new image size */ 1532 size_to_scale(dev, v4l2->width, v4l2->height, 1533 &v4l2->hscale, &v4l2->vscale); 1534 1535 em28xx_resolution_set(dev); 1536 1537 return 0; 1538} 1539 1540static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 1541 struct v4l2_format *f) 1542{ 1543 struct em28xx *dev = video_drvdata(file); 1544 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1545 1546 if (vb2_is_busy(&v4l2->vb_vidq)) 1547 return -EBUSY; 1548 1549 vidioc_try_fmt_vid_cap(file, priv, f); 1550 1551 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat, 1552 f->fmt.pix.width, f->fmt.pix.height); 1553} 1554 1555static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm) 1556{ 1557 struct em28xx *dev = video_drvdata(file); 1558 1559 *norm = dev->v4l2->norm; 1560 1561 return 0; 1562} 1563 1564static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm) 1565{ 1566 struct em28xx *dev = video_drvdata(file); 1567 1568 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm); 1569 1570 return 0; 1571} 1572 1573static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm) 1574{ 1575 struct em28xx *dev = video_drvdata(file); 1576 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1577 struct v4l2_format f; 1578 1579 if (norm == v4l2->norm) 1580 return 0; 1581 1582 if (v4l2->streaming_users > 0) 1583 return -EBUSY; 1584 1585 v4l2->norm = norm; 1586 1587 /* Adjusts width/height, if needed */ 1588 f.fmt.pix.width = 720; 1589 f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576; 1590 vidioc_try_fmt_vid_cap(file, priv, &f); 1591 1592 /* set new image size */ 1593 v4l2->width = f.fmt.pix.width; 1594 v4l2->height = f.fmt.pix.height; 1595 size_to_scale(dev, v4l2->width, v4l2->height, 1596 &v4l2->hscale, &v4l2->vscale); 1597 1598 em28xx_resolution_set(dev); 1599 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm); 1600 1601 return 0; 1602} 1603 1604static int vidioc_g_parm(struct file *file, void *priv, 1605 struct v4l2_streamparm *p) 1606{ 1607 struct v4l2_subdev_frame_interval ival = { 0 }; 1608 struct em28xx *dev = video_drvdata(file); 1609 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1610 int rc = 0; 1611 1612 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1613 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1614 return -EINVAL; 1615 1616 p->parm.capture.readbuffers = EM28XX_MIN_BUF; 1617 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 1618 if (dev->is_webcam) { 1619 rc = v4l2_device_call_until_err(&v4l2->v4l2_dev, 0, 1620 video, g_frame_interval, &ival); 1621 if (!rc) 1622 p->parm.capture.timeperframe = ival.interval; 1623 } else { 1624 v4l2_video_std_frame_period(v4l2->norm, 1625 &p->parm.capture.timeperframe); 1626 } 1627 1628 return rc; 1629} 1630 1631static int vidioc_s_parm(struct file *file, void *priv, 1632 struct v4l2_streamparm *p) 1633{ 1634 struct em28xx *dev = video_drvdata(file); 1635 struct v4l2_subdev_frame_interval ival = { 1636 0, 1637 p->parm.capture.timeperframe 1638 }; 1639 int rc = 0; 1640 1641 if (!dev->is_webcam) 1642 return -ENOTTY; 1643 1644 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1645 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1646 return -EINVAL; 1647 1648 memset(&p->parm, 0, sizeof(p->parm)); 1649 p->parm.capture.readbuffers = EM28XX_MIN_BUF; 1650 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 1651 rc = v4l2_device_call_until_err(&dev->v4l2->v4l2_dev, 0, 1652 video, s_frame_interval, &ival); 1653 if (!rc) 1654 p->parm.capture.timeperframe = ival.interval; 1655 return rc; 1656} 1657 1658static int vidioc_enum_input(struct file *file, void *priv, 1659 struct v4l2_input *i) 1660{ 1661 struct em28xx *dev = video_drvdata(file); 1662 unsigned int n; 1663 int j; 1664 1665 n = i->index; 1666 if (n >= MAX_EM28XX_INPUT) 1667 return -EINVAL; 1668 if (!INPUT(n)->type) 1669 return -EINVAL; 1670 1671 i->type = V4L2_INPUT_TYPE_CAMERA; 1672 1673 strscpy(i->name, iname[INPUT(n)->type], sizeof(i->name)); 1674 1675 if (INPUT(n)->type == EM28XX_VMUX_TELEVISION) 1676 i->type = V4L2_INPUT_TYPE_TUNER; 1677 1678 i->std = dev->v4l2->vdev.tvnorms; 1679 /* webcams do not have the STD API */ 1680 if (dev->is_webcam) 1681 i->capabilities = 0; 1682 1683 /* Dynamically generates an audioset bitmask */ 1684 i->audioset = 0; 1685 for (j = 0; j < MAX_EM28XX_INPUT; j++) 1686 if (dev->amux_map[j] != EM28XX_AMUX_UNUSED) 1687 i->audioset |= 1 << j; 1688 1689 return 0; 1690} 1691 1692static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 1693{ 1694 struct em28xx *dev = video_drvdata(file); 1695 1696 *i = dev->ctl_input; 1697 1698 return 0; 1699} 1700 1701static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 1702{ 1703 struct em28xx *dev = video_drvdata(file); 1704 1705 if (i >= MAX_EM28XX_INPUT) 1706 return -EINVAL; 1707 if (!INPUT(i)->type) 1708 return -EINVAL; 1709 1710 video_mux(dev, i); 1711 return 0; 1712} 1713 1714static int em28xx_fill_audio_input(struct em28xx *dev, 1715 const char *s, 1716 struct v4l2_audio *a, 1717 unsigned int index) 1718{ 1719 unsigned int idx = dev->amux_map[index]; 1720 1721 /* 1722 * With msp3400, almost all mappings use the default (amux = 0). 1723 * The only one may use a different value is WinTV USB2, where it 1724 * can also be SCART1 input. 1725 * As it is very doubtful that we would see new boards with msp3400, 1726 * let's just reuse the existing switch. 1727 */ 1728 if (dev->has_msp34xx && idx != EM28XX_AMUX_UNUSED) 1729 idx = EM28XX_AMUX_LINE_IN; 1730 1731 switch (idx) { 1732 case EM28XX_AMUX_VIDEO: 1733 strscpy(a->name, "Television", sizeof(a->name)); 1734 break; 1735 case EM28XX_AMUX_LINE_IN: 1736 strscpy(a->name, "Line In", sizeof(a->name)); 1737 break; 1738 case EM28XX_AMUX_VIDEO2: 1739 strscpy(a->name, "Television alt", sizeof(a->name)); 1740 break; 1741 case EM28XX_AMUX_PHONE: 1742 strscpy(a->name, "Phone", sizeof(a->name)); 1743 break; 1744 case EM28XX_AMUX_MIC: 1745 strscpy(a->name, "Mic", sizeof(a->name)); 1746 break; 1747 case EM28XX_AMUX_CD: 1748 strscpy(a->name, "CD", sizeof(a->name)); 1749 break; 1750 case EM28XX_AMUX_AUX: 1751 strscpy(a->name, "Aux", sizeof(a->name)); 1752 break; 1753 case EM28XX_AMUX_PCM_OUT: 1754 strscpy(a->name, "PCM", sizeof(a->name)); 1755 break; 1756 case EM28XX_AMUX_UNUSED: 1757 default: 1758 return -EINVAL; 1759 } 1760 a->index = index; 1761 a->capability = V4L2_AUDCAP_STEREO; 1762 1763 em28xx_videodbg("%s: audio input index %d is '%s'\n", 1764 s, a->index, a->name); 1765 1766 return 0; 1767} 1768 1769static int vidioc_enumaudio(struct file *file, void *fh, struct v4l2_audio *a) 1770{ 1771 struct em28xx *dev = video_drvdata(file); 1772 1773 if (a->index >= MAX_EM28XX_INPUT) 1774 return -EINVAL; 1775 1776 return em28xx_fill_audio_input(dev, __func__, a, a->index); 1777} 1778 1779static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a) 1780{ 1781 struct em28xx *dev = video_drvdata(file); 1782 int i; 1783 1784 for (i = 0; i < MAX_EM28XX_INPUT; i++) 1785 if (dev->ctl_ainput == dev->amux_map[i]) 1786 return em28xx_fill_audio_input(dev, __func__, a, i); 1787 1788 /* Should never happen! */ 1789 return -EINVAL; 1790} 1791 1792static int vidioc_s_audio(struct file *file, void *priv, 1793 const struct v4l2_audio *a) 1794{ 1795 struct em28xx *dev = video_drvdata(file); 1796 int idx, i; 1797 1798 if (a->index >= MAX_EM28XX_INPUT) 1799 return -EINVAL; 1800 1801 idx = dev->amux_map[a->index]; 1802 1803 if (idx == EM28XX_AMUX_UNUSED) 1804 return -EINVAL; 1805 1806 dev->ctl_ainput = idx; 1807 1808 /* 1809 * FIXME: This is wrong, as different inputs at em28xx_cards 1810 * may have different audio outputs. So, the right thing 1811 * to do is to implement VIDIOC_G_AUDOUT/VIDIOC_S_AUDOUT. 1812 * With the current board definitions, this would work fine, 1813 * as, currently, all boards fit. 1814 */ 1815 for (i = 0; i < MAX_EM28XX_INPUT; i++) 1816 if (idx == dev->amux_map[i]) 1817 break; 1818 if (i == MAX_EM28XX_INPUT) 1819 return -EINVAL; 1820 1821 dev->ctl_aoutput = INPUT(i)->aout; 1822 1823 if (!dev->ctl_aoutput) 1824 dev->ctl_aoutput = EM28XX_AOUT_MASTER; 1825 1826 em28xx_videodbg("%s: set audio input to %d\n", __func__, 1827 dev->ctl_ainput); 1828 1829 return 0; 1830} 1831 1832static int vidioc_g_tuner(struct file *file, void *priv, 1833 struct v4l2_tuner *t) 1834{ 1835 struct em28xx *dev = video_drvdata(file); 1836 1837 if (t->index != 0) 1838 return -EINVAL; 1839 1840 strscpy(t->name, "Tuner", sizeof(t->name)); 1841 1842 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t); 1843 return 0; 1844} 1845 1846static int vidioc_s_tuner(struct file *file, void *priv, 1847 const struct v4l2_tuner *t) 1848{ 1849 struct em28xx *dev = video_drvdata(file); 1850 1851 if (t->index != 0) 1852 return -EINVAL; 1853 1854 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t); 1855 return 0; 1856} 1857 1858static int vidioc_g_frequency(struct file *file, void *priv, 1859 struct v4l2_frequency *f) 1860{ 1861 struct em28xx *dev = video_drvdata(file); 1862 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1863 1864 if (f->tuner != 0) 1865 return -EINVAL; 1866 1867 f->frequency = v4l2->frequency; 1868 return 0; 1869} 1870 1871static int vidioc_s_frequency(struct file *file, void *priv, 1872 const struct v4l2_frequency *f) 1873{ 1874 struct v4l2_frequency new_freq = *f; 1875 struct em28xx *dev = video_drvdata(file); 1876 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1877 1878 if (f->tuner != 0) 1879 return -EINVAL; 1880 1881 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_frequency, f); 1882 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, g_frequency, &new_freq); 1883 v4l2->frequency = new_freq.frequency; 1884 1885 return 0; 1886} 1887 1888#ifdef CONFIG_VIDEO_ADV_DEBUG 1889static int vidioc_g_chip_info(struct file *file, void *priv, 1890 struct v4l2_dbg_chip_info *chip) 1891{ 1892 struct em28xx *dev = video_drvdata(file); 1893 1894 if (chip->match.addr > 1) 1895 return -EINVAL; 1896 if (chip->match.addr == 1) 1897 strscpy(chip->name, "ac97", sizeof(chip->name)); 1898 else 1899 strscpy(chip->name, 1900 dev->v4l2->v4l2_dev.name, sizeof(chip->name)); 1901 return 0; 1902} 1903 1904static int em28xx_reg_len(int reg) 1905{ 1906 switch (reg) { 1907 case EM28XX_R40_AC97LSB: 1908 case EM28XX_R30_HSCALELOW: 1909 case EM28XX_R32_VSCALELOW: 1910 return 2; 1911 default: 1912 return 1; 1913 } 1914} 1915 1916static int vidioc_g_register(struct file *file, void *priv, 1917 struct v4l2_dbg_register *reg) 1918{ 1919 struct em28xx *dev = video_drvdata(file); 1920 int ret; 1921 1922 if (reg->match.addr > 1) 1923 return -EINVAL; 1924 if (reg->match.addr) { 1925 ret = em28xx_read_ac97(dev, reg->reg); 1926 if (ret < 0) 1927 return ret; 1928 1929 reg->val = ret; 1930 reg->size = 1; 1931 return 0; 1932 } 1933 1934 /* Match host */ 1935 reg->size = em28xx_reg_len(reg->reg); 1936 if (reg->size == 1) { 1937 ret = em28xx_read_reg(dev, reg->reg); 1938 1939 if (ret < 0) 1940 return ret; 1941 1942 reg->val = ret; 1943 } else { 1944 __le16 val = 0; 1945 1946 ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS, 1947 reg->reg, (char *)&val, 2); 1948 if (ret < 0) 1949 return ret; 1950 1951 reg->val = le16_to_cpu(val); 1952 } 1953 1954 return 0; 1955} 1956 1957static int vidioc_s_register(struct file *file, void *priv, 1958 const struct v4l2_dbg_register *reg) 1959{ 1960 struct em28xx *dev = video_drvdata(file); 1961 __le16 buf; 1962 1963 if (reg->match.addr > 1) 1964 return -EINVAL; 1965 if (reg->match.addr) 1966 return em28xx_write_ac97(dev, reg->reg, reg->val); 1967 1968 /* Match host */ 1969 buf = cpu_to_le16(reg->val); 1970 1971 return em28xx_write_regs(dev, reg->reg, (char *)&buf, 1972 em28xx_reg_len(reg->reg)); 1973} 1974#endif 1975 1976static int vidioc_querycap(struct file *file, void *priv, 1977 struct v4l2_capability *cap) 1978{ 1979 struct em28xx *dev = video_drvdata(file); 1980 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1981 struct usb_device *udev = interface_to_usbdev(dev->intf); 1982 1983 strscpy(cap->driver, "em28xx", sizeof(cap->driver)); 1984 strscpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); 1985 usb_make_path(udev, cap->bus_info, sizeof(cap->bus_info)); 1986 1987 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_READWRITE | 1988 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; 1989 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE) 1990 cap->capabilities |= V4L2_CAP_AUDIO; 1991 if (dev->tuner_type != TUNER_ABSENT) 1992 cap->capabilities |= V4L2_CAP_TUNER; 1993 if (video_is_registered(&v4l2->vbi_dev)) 1994 cap->capabilities |= V4L2_CAP_VBI_CAPTURE; 1995 if (video_is_registered(&v4l2->radio_dev)) 1996 cap->capabilities |= V4L2_CAP_RADIO; 1997 return 0; 1998} 1999 2000static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 2001 struct v4l2_fmtdesc *f) 2002{ 2003 if (unlikely(f->index >= ARRAY_SIZE(format))) 2004 return -EINVAL; 2005 2006 f->pixelformat = format[f->index].fourcc; 2007 2008 return 0; 2009} 2010 2011static int vidioc_enum_framesizes(struct file *file, void *priv, 2012 struct v4l2_frmsizeenum *fsize) 2013{ 2014 struct em28xx *dev = video_drvdata(file); 2015 struct em28xx_fmt *fmt; 2016 unsigned int maxw = norm_maxw(dev); 2017 unsigned int maxh = norm_maxh(dev); 2018 2019 fmt = format_by_fourcc(fsize->pixel_format); 2020 if (!fmt) { 2021 em28xx_videodbg("Fourcc format (%08x) invalid.\n", 2022 fsize->pixel_format); 2023 return -EINVAL; 2024 } 2025 2026 if (dev->board.is_em2800) { 2027 if (fsize->index > 1) 2028 return -EINVAL; 2029 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 2030 fsize->discrete.width = maxw / (1 + fsize->index); 2031 fsize->discrete.height = maxh / (1 + fsize->index); 2032 return 0; 2033 } 2034 2035 if (fsize->index != 0) 2036 return -EINVAL; 2037 2038 /* Report a continuous range */ 2039 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; 2040 scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX, 2041 &fsize->stepwise.min_width, &fsize->stepwise.min_height); 2042 if (fsize->stepwise.min_width < 48) 2043 fsize->stepwise.min_width = 48; 2044 if (fsize->stepwise.min_height < 38) 2045 fsize->stepwise.min_height = 38; 2046 fsize->stepwise.max_width = maxw; 2047 fsize->stepwise.max_height = maxh; 2048 fsize->stepwise.step_width = 1; 2049 fsize->stepwise.step_height = 1; 2050 return 0; 2051} 2052 2053/* RAW VBI ioctls */ 2054 2055static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv, 2056 struct v4l2_format *format) 2057{ 2058 struct em28xx *dev = video_drvdata(file); 2059 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2060 2061 format->fmt.vbi.samples_per_line = v4l2->vbi_width; 2062 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; 2063 format->fmt.vbi.offset = 0; 2064 format->fmt.vbi.flags = 0; 2065 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; 2066 format->fmt.vbi.count[0] = v4l2->vbi_height; 2067 format->fmt.vbi.count[1] = v4l2->vbi_height; 2068 memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved)); 2069 2070 /* Varies by video standard (NTSC, PAL, etc.) */ 2071 if (v4l2->norm & V4L2_STD_525_60) { 2072 /* NTSC */ 2073 format->fmt.vbi.start[0] = 10; 2074 format->fmt.vbi.start[1] = 273; 2075 } else if (v4l2->norm & V4L2_STD_625_50) { 2076 /* PAL */ 2077 format->fmt.vbi.start[0] = 6; 2078 format->fmt.vbi.start[1] = 318; 2079 } 2080 2081 return 0; 2082} 2083 2084/* 2085 * RADIO ESPECIFIC IOCTLS 2086 */ 2087 2088static int radio_g_tuner(struct file *file, void *priv, 2089 struct v4l2_tuner *t) 2090{ 2091 struct em28xx *dev = video_drvdata(file); 2092 2093 if (unlikely(t->index > 0)) 2094 return -EINVAL; 2095 2096 strscpy(t->name, "Radio", sizeof(t->name)); 2097 2098 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t); 2099 2100 return 0; 2101} 2102 2103static int radio_s_tuner(struct file *file, void *priv, 2104 const struct v4l2_tuner *t) 2105{ 2106 struct em28xx *dev = video_drvdata(file); 2107 2108 if (t->index != 0) 2109 return -EINVAL; 2110 2111 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t); 2112 2113 return 0; 2114} 2115 2116/* 2117 * em28xx_free_v4l2() - Free struct em28xx_v4l2 2118 * 2119 * @ref: struct kref for struct em28xx_v4l2 2120 * 2121 * Called when all users of struct em28xx_v4l2 are gone 2122 */ 2123static void em28xx_free_v4l2(struct kref *ref) 2124{ 2125 struct em28xx_v4l2 *v4l2 = container_of(ref, struct em28xx_v4l2, ref); 2126 2127 v4l2->dev->v4l2 = NULL; 2128 kfree(v4l2); 2129} 2130 2131/* 2132 * em28xx_v4l2_open() 2133 * inits the device and starts isoc transfer 2134 */ 2135static int em28xx_v4l2_open(struct file *filp) 2136{ 2137 struct video_device *vdev = video_devdata(filp); 2138 struct em28xx *dev = video_drvdata(filp); 2139 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2140 enum v4l2_buf_type fh_type = 0; 2141 int ret; 2142 2143 switch (vdev->vfl_type) { 2144 case VFL_TYPE_VIDEO: 2145 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2146 break; 2147 case VFL_TYPE_VBI: 2148 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE; 2149 break; 2150 case VFL_TYPE_RADIO: 2151 break; 2152 default: 2153 return -EINVAL; 2154 } 2155 2156 em28xx_videodbg("open dev=%s type=%s users=%d\n", 2157 video_device_node_name(vdev), v4l2_type_names[fh_type], 2158 v4l2->users); 2159 2160 if (mutex_lock_interruptible(&dev->lock)) 2161 return -ERESTARTSYS; 2162 2163 ret = v4l2_fh_open(filp); 2164 if (ret) { 2165 dev_err(&dev->intf->dev, 2166 "%s: v4l2_fh_open() returned error %d\n", 2167 __func__, ret); 2168 mutex_unlock(&dev->lock); 2169 return ret; 2170 } 2171 2172 if (v4l2->users == 0) { 2173 em28xx_set_mode(dev, EM28XX_ANALOG_MODE); 2174 2175 if (vdev->vfl_type != VFL_TYPE_RADIO) 2176 em28xx_resolution_set(dev); 2177 2178 /* 2179 * Needed, since GPIO might have disabled power 2180 * of some i2c devices 2181 */ 2182 em28xx_wake_i2c(dev); 2183 } 2184 2185 if (vdev->vfl_type == VFL_TYPE_RADIO) { 2186 em28xx_videodbg("video_open: setting radio device\n"); 2187 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_radio); 2188 } 2189 2190 kref_get(&dev->ref); 2191 kref_get(&v4l2->ref); 2192 v4l2->users++; 2193 2194 mutex_unlock(&dev->lock); 2195 2196 return 0; 2197} 2198 2199/* 2200 * em28xx_v4l2_fini() 2201 * unregisters the v4l2,i2c and usb devices 2202 * called when the device gets disconnected or at module unload 2203 */ 2204static int em28xx_v4l2_fini(struct em28xx *dev) 2205{ 2206 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2207 2208 if (dev->is_audio_only) { 2209 /* Shouldn't initialize IR for this interface */ 2210 return 0; 2211 } 2212 2213 if (!dev->has_video) { 2214 /* This device does not support the v4l2 extension */ 2215 return 0; 2216 } 2217 2218 if (!v4l2) 2219 return 0; 2220 2221 dev_info(&dev->intf->dev, "Closing video extension\n"); 2222 2223 mutex_lock(&dev->lock); 2224 2225 v4l2_device_disconnect(&v4l2->v4l2_dev); 2226 2227 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); 2228 2229 em28xx_v4l2_media_release(dev); 2230 2231 if (video_is_registered(&v4l2->radio_dev)) { 2232 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n", 2233 video_device_node_name(&v4l2->radio_dev)); 2234 video_unregister_device(&v4l2->radio_dev); 2235 } 2236 if (video_is_registered(&v4l2->vbi_dev)) { 2237 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n", 2238 video_device_node_name(&v4l2->vbi_dev)); 2239 video_unregister_device(&v4l2->vbi_dev); 2240 } 2241 if (video_is_registered(&v4l2->vdev)) { 2242 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n", 2243 video_device_node_name(&v4l2->vdev)); 2244 video_unregister_device(&v4l2->vdev); 2245 } 2246 2247 v4l2_ctrl_handler_free(&v4l2->ctrl_handler); 2248 v4l2_device_unregister(&v4l2->v4l2_dev); 2249 2250 kref_put(&v4l2->ref, em28xx_free_v4l2); 2251 2252 mutex_unlock(&dev->lock); 2253 2254 kref_put(&dev->ref, em28xx_free_device); 2255 2256 return 0; 2257} 2258 2259static int em28xx_v4l2_suspend(struct em28xx *dev) 2260{ 2261 if (dev->is_audio_only) 2262 return 0; 2263 2264 if (!dev->has_video) 2265 return 0; 2266 2267 dev_info(&dev->intf->dev, "Suspending video extension\n"); 2268 em28xx_stop_urbs(dev); 2269 return 0; 2270} 2271 2272static int em28xx_v4l2_resume(struct em28xx *dev) 2273{ 2274 if (dev->is_audio_only) 2275 return 0; 2276 2277 if (!dev->has_video) 2278 return 0; 2279 2280 dev_info(&dev->intf->dev, "Resuming video extension\n"); 2281 /* what do we do here */ 2282 return 0; 2283} 2284 2285/* 2286 * em28xx_v4l2_close() 2287 * stops streaming and deallocates all resources allocated by the v4l2 2288 * calls and ioctls 2289 */ 2290static int em28xx_v4l2_close(struct file *filp) 2291{ 2292 struct em28xx *dev = video_drvdata(filp); 2293 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2294 struct usb_device *udev = interface_to_usbdev(dev->intf); 2295 int err; 2296 2297 em28xx_videodbg("users=%d\n", v4l2->users); 2298 2299 vb2_fop_release(filp); 2300 mutex_lock(&dev->lock); 2301 2302 if (v4l2->users == 1) { 2303 /* No sense to try to write to the device */ 2304 if (dev->disconnected) 2305 goto exit; 2306 2307 /* Save some power by putting tuner to sleep */ 2308 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby); 2309 2310 /* do this before setting alternate! */ 2311 em28xx_set_mode(dev, EM28XX_SUSPEND); 2312 2313 /* set alternate 0 */ 2314 dev->alt = 0; 2315 em28xx_videodbg("setting alternate 0\n"); 2316 err = usb_set_interface(udev, 0, 0); 2317 if (err < 0) { 2318 dev_err(&dev->intf->dev, 2319 "cannot change alternate number to 0 (error=%i)\n", 2320 err); 2321 } 2322 } 2323 2324exit: 2325 v4l2->users--; 2326 kref_put(&v4l2->ref, em28xx_free_v4l2); 2327 mutex_unlock(&dev->lock); 2328 kref_put(&dev->ref, em28xx_free_device); 2329 2330 return 0; 2331} 2332 2333static const struct v4l2_file_operations em28xx_v4l_fops = { 2334 .owner = THIS_MODULE, 2335 .open = em28xx_v4l2_open, 2336 .release = em28xx_v4l2_close, 2337 .read = vb2_fop_read, 2338 .poll = vb2_fop_poll, 2339 .mmap = vb2_fop_mmap, 2340 .unlocked_ioctl = video_ioctl2, 2341}; 2342 2343static const struct v4l2_ioctl_ops video_ioctl_ops = { 2344 .vidioc_querycap = vidioc_querycap, 2345 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 2346 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 2347 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 2348 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 2349 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2350 .vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2351 .vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2352 .vidioc_enum_framesizes = vidioc_enum_framesizes, 2353 .vidioc_enumaudio = vidioc_enumaudio, 2354 .vidioc_g_audio = vidioc_g_audio, 2355 .vidioc_s_audio = vidioc_s_audio, 2356 2357 .vidioc_reqbufs = vb2_ioctl_reqbufs, 2358 .vidioc_create_bufs = vb2_ioctl_create_bufs, 2359 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 2360 .vidioc_querybuf = vb2_ioctl_querybuf, 2361 .vidioc_qbuf = vb2_ioctl_qbuf, 2362 .vidioc_dqbuf = vb2_ioctl_dqbuf, 2363 2364 .vidioc_g_std = vidioc_g_std, 2365 .vidioc_querystd = vidioc_querystd, 2366 .vidioc_s_std = vidioc_s_std, 2367 .vidioc_g_parm = vidioc_g_parm, 2368 .vidioc_s_parm = vidioc_s_parm, 2369 .vidioc_enum_input = vidioc_enum_input, 2370 .vidioc_g_input = vidioc_g_input, 2371 .vidioc_s_input = vidioc_s_input, 2372 .vidioc_streamon = vb2_ioctl_streamon, 2373 .vidioc_streamoff = vb2_ioctl_streamoff, 2374 .vidioc_g_tuner = vidioc_g_tuner, 2375 .vidioc_s_tuner = vidioc_s_tuner, 2376 .vidioc_g_frequency = vidioc_g_frequency, 2377 .vidioc_s_frequency = vidioc_s_frequency, 2378 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 2379 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 2380#ifdef CONFIG_VIDEO_ADV_DEBUG 2381 .vidioc_g_chip_info = vidioc_g_chip_info, 2382 .vidioc_g_register = vidioc_g_register, 2383 .vidioc_s_register = vidioc_s_register, 2384#endif 2385}; 2386 2387static const struct video_device em28xx_video_template = { 2388 .fops = &em28xx_v4l_fops, 2389 .ioctl_ops = &video_ioctl_ops, 2390 .release = video_device_release_empty, 2391 .tvnorms = V4L2_STD_ALL, 2392}; 2393 2394static const struct v4l2_file_operations radio_fops = { 2395 .owner = THIS_MODULE, 2396 .open = em28xx_v4l2_open, 2397 .release = em28xx_v4l2_close, 2398 .unlocked_ioctl = video_ioctl2, 2399}; 2400 2401static const struct v4l2_ioctl_ops radio_ioctl_ops = { 2402 .vidioc_querycap = vidioc_querycap, 2403 .vidioc_g_tuner = radio_g_tuner, 2404 .vidioc_s_tuner = radio_s_tuner, 2405 .vidioc_g_frequency = vidioc_g_frequency, 2406 .vidioc_s_frequency = vidioc_s_frequency, 2407 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 2408 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 2409#ifdef CONFIG_VIDEO_ADV_DEBUG 2410 .vidioc_g_chip_info = vidioc_g_chip_info, 2411 .vidioc_g_register = vidioc_g_register, 2412 .vidioc_s_register = vidioc_s_register, 2413#endif 2414}; 2415 2416static struct video_device em28xx_radio_template = { 2417 .fops = &radio_fops, 2418 .ioctl_ops = &radio_ioctl_ops, 2419 .release = video_device_release_empty, 2420}; 2421 2422/* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */ 2423static unsigned short saa711x_addrs[] = { 2424 0x4a >> 1, 0x48 >> 1, /* SAA7111, SAA7111A and SAA7113 */ 2425 0x42 >> 1, 0x40 >> 1, /* SAA7114, SAA7115 and SAA7118 */ 2426 I2C_CLIENT_END }; 2427 2428static unsigned short tvp5150_addrs[] = { 2429 0xb8 >> 1, 2430 0xba >> 1, 2431 I2C_CLIENT_END 2432}; 2433 2434static unsigned short msp3400_addrs[] = { 2435 0x80 >> 1, 2436 0x88 >> 1, 2437 I2C_CLIENT_END 2438}; 2439 2440/******************************** usb interface ******************************/ 2441 2442static void em28xx_vdev_init(struct em28xx *dev, 2443 struct video_device *vfd, 2444 const struct video_device *template, 2445 const char *type_name) 2446{ 2447 *vfd = *template; 2448 vfd->v4l2_dev = &dev->v4l2->v4l2_dev; 2449 vfd->lock = &dev->lock; 2450 if (dev->is_webcam) 2451 vfd->tvnorms = 0; 2452 2453 snprintf(vfd->name, sizeof(vfd->name), "%s %s", 2454 dev_name(&dev->intf->dev), type_name); 2455 2456 video_set_drvdata(vfd, dev); 2457} 2458 2459static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr) 2460{ 2461 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2462 struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev; 2463 struct tuner_setup tun_setup; 2464 struct v4l2_frequency f; 2465 2466 memset(&tun_setup, 0, sizeof(tun_setup)); 2467 2468 tun_setup.mode_mask = T_ANALOG_TV | T_RADIO; 2469 tun_setup.tuner_callback = em28xx_tuner_callback; 2470 2471 if (dev->board.radio.type) { 2472 tun_setup.type = dev->board.radio.type; 2473 tun_setup.addr = dev->board.radio_addr; 2474 2475 v4l2_device_call_all(v4l2_dev, 2476 0, tuner, s_type_addr, &tun_setup); 2477 } 2478 2479 if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type) { 2480 tun_setup.type = dev->tuner_type; 2481 tun_setup.addr = tuner_addr; 2482 2483 v4l2_device_call_all(v4l2_dev, 2484 0, tuner, s_type_addr, &tun_setup); 2485 } 2486 2487 if (dev->board.tda9887_conf) { 2488 struct v4l2_priv_tun_config tda9887_cfg; 2489 2490 tda9887_cfg.tuner = TUNER_TDA9887; 2491 tda9887_cfg.priv = &dev->board.tda9887_conf; 2492 2493 v4l2_device_call_all(v4l2_dev, 2494 0, tuner, s_config, &tda9887_cfg); 2495 } 2496 2497 if (dev->tuner_type == TUNER_XC2028) { 2498 struct v4l2_priv_tun_config xc2028_cfg; 2499 struct xc2028_ctrl ctl; 2500 2501 memset(&xc2028_cfg, 0, sizeof(xc2028_cfg)); 2502 memset(&ctl, 0, sizeof(ctl)); 2503 2504 em28xx_setup_xc3028(dev, &ctl); 2505 2506 xc2028_cfg.tuner = TUNER_XC2028; 2507 xc2028_cfg.priv = &ctl; 2508 2509 v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg); 2510 } 2511 2512 /* configure tuner */ 2513 f.tuner = 0; 2514 f.type = V4L2_TUNER_ANALOG_TV; 2515 f.frequency = 9076; /* just a magic number */ 2516 v4l2->frequency = f.frequency; 2517 v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency, &f); 2518} 2519 2520static int em28xx_v4l2_init(struct em28xx *dev) 2521{ 2522 u8 val; 2523 int ret; 2524 unsigned int maxw; 2525 struct v4l2_ctrl_handler *hdl; 2526 struct em28xx_v4l2 *v4l2; 2527 2528 if (dev->is_audio_only) { 2529 /* Shouldn't initialize IR for this interface */ 2530 return 0; 2531 } 2532 2533 if (!dev->has_video) { 2534 /* This device does not support the v4l2 extension */ 2535 return 0; 2536 } 2537 2538 dev_info(&dev->intf->dev, "Registering V4L2 extension\n"); 2539 2540 mutex_lock(&dev->lock); 2541 2542 v4l2 = kzalloc(sizeof(*v4l2), GFP_KERNEL); 2543 if (!v4l2) { 2544 mutex_unlock(&dev->lock); 2545 return -ENOMEM; 2546 } 2547 kref_init(&v4l2->ref); 2548 v4l2->dev = dev; 2549 dev->v4l2 = v4l2; 2550 2551#ifdef CONFIG_MEDIA_CONTROLLER 2552 v4l2->v4l2_dev.mdev = dev->media_dev; 2553#endif 2554 ret = v4l2_device_register(&dev->intf->dev, &v4l2->v4l2_dev); 2555 if (ret < 0) { 2556 dev_err(&dev->intf->dev, 2557 "Call to v4l2_device_register() failed!\n"); 2558 goto err; 2559 } 2560 2561 hdl = &v4l2->ctrl_handler; 2562 v4l2_ctrl_handler_init(hdl, 8); 2563 v4l2->v4l2_dev.ctrl_handler = hdl; 2564 2565 if (dev->is_webcam) 2566 v4l2->progressive = true; 2567 2568 /* 2569 * Default format, used for tvp5150 or saa711x output formats 2570 */ 2571 v4l2->vinmode = EM28XX_VINMODE_YUV422_CbYCrY; 2572 v4l2->vinctl = EM28XX_VINCTRL_INTERLACED | 2573 EM28XX_VINCTRL_CCIR656_ENABLE; 2574 2575 /* request some modules */ 2576 2577 if (dev->has_msp34xx) 2578 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2579 &dev->i2c_adap[dev->def_i2c_bus], 2580 "msp3400", 0, msp3400_addrs); 2581 2582 if (dev->board.decoder == EM28XX_SAA711X) 2583 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2584 &dev->i2c_adap[dev->def_i2c_bus], 2585 "saa7115_auto", 0, saa711x_addrs); 2586 2587 if (dev->board.decoder == EM28XX_TVP5150) 2588 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2589 &dev->i2c_adap[dev->def_i2c_bus], 2590 "tvp5150", 0, tvp5150_addrs); 2591 2592 if (dev->board.adecoder == EM28XX_TVAUDIO) 2593 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2594 &dev->i2c_adap[dev->def_i2c_bus], 2595 "tvaudio", dev->board.tvaudio_addr, NULL); 2596 2597 /* Initialize tuner and camera */ 2598 2599 if (dev->board.tuner_type != TUNER_ABSENT) { 2600 unsigned short tuner_addr = dev->board.tuner_addr; 2601 int has_demod = (dev->board.tda9887_conf & TDA9887_PRESENT); 2602 2603 if (dev->board.radio.type) 2604 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2605 &dev->i2c_adap[dev->def_i2c_bus], 2606 "tuner", dev->board.radio_addr, 2607 NULL); 2608 2609 if (has_demod) 2610 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2611 &dev->i2c_adap[dev->def_i2c_bus], 2612 "tuner", 0, 2613 v4l2_i2c_tuner_addrs(ADDRS_DEMOD)); 2614 if (tuner_addr == 0) { 2615 enum v4l2_i2c_tuner_type type = 2616 has_demod ? ADDRS_TV_WITH_DEMOD : ADDRS_TV; 2617 struct v4l2_subdev *sd; 2618 2619 sd = v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2620 &dev->i2c_adap[dev->def_i2c_bus], 2621 "tuner", 0, 2622 v4l2_i2c_tuner_addrs(type)); 2623 2624 if (sd) 2625 tuner_addr = v4l2_i2c_subdev_addr(sd); 2626 } else { 2627 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2628 &dev->i2c_adap[dev->def_i2c_bus], 2629 "tuner", tuner_addr, NULL); 2630 } 2631 2632 em28xx_tuner_setup(dev, tuner_addr); 2633 } 2634 2635 if (dev->em28xx_sensor != EM28XX_NOSENSOR) 2636 em28xx_init_camera(dev); 2637 2638 /* Configure audio */ 2639 ret = em28xx_audio_setup(dev); 2640 if (ret < 0) { 2641 dev_err(&dev->intf->dev, 2642 "%s: Error while setting audio - error [%d]!\n", 2643 __func__, ret); 2644 goto unregister_dev; 2645 } 2646 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) { 2647 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2648 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); 2649 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2650 V4L2_CID_AUDIO_VOLUME, 0, 0x1f, 1, 0x1f); 2651 } else { 2652 /* install the em28xx notify callback */ 2653 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_MUTE), 2654 em28xx_ctrl_notify, dev); 2655 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_VOLUME), 2656 em28xx_ctrl_notify, dev); 2657 } 2658 2659 /* wake i2c devices */ 2660 em28xx_wake_i2c(dev); 2661 2662 /* init video dma queues */ 2663 INIT_LIST_HEAD(&dev->vidq.active); 2664 INIT_LIST_HEAD(&dev->vbiq.active); 2665 2666 if (dev->has_msp34xx) { 2667 /* Send a reset to other chips via gpio */ 2668 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xf7); 2669 if (ret < 0) { 2670 dev_err(&dev->intf->dev, 2671 "%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n", 2672 __func__, ret); 2673 goto unregister_dev; 2674 } 2675 usleep_range(10000, 11000); 2676 2677 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xff); 2678 if (ret < 0) { 2679 dev_err(&dev->intf->dev, 2680 "%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n", 2681 __func__, ret); 2682 goto unregister_dev; 2683 } 2684 usleep_range(10000, 11000); 2685 } 2686 2687 /* set default norm */ 2688 v4l2->norm = V4L2_STD_PAL; 2689 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm); 2690 v4l2->interlaced_fieldmode = EM28XX_INTERLACED_DEFAULT; 2691 2692 /* Analog specific initialization */ 2693 v4l2->format = &format[0]; 2694 2695 maxw = norm_maxw(dev); 2696 /* 2697 * MaxPacketSize for em2800 is too small to capture at full resolution 2698 * use half of maxw as the scaler can only scale to 50% 2699 */ 2700 if (dev->board.is_em2800) 2701 maxw /= 2; 2702 2703 em28xx_set_video_format(dev, format[0].fourcc, 2704 maxw, norm_maxh(dev)); 2705 2706 video_mux(dev, 0); 2707 2708 /* Audio defaults */ 2709 dev->mute = 1; 2710 dev->volume = 0x1f; 2711 2712/* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */ 2713 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK); 2714 em28xx_write_reg(dev, EM28XX_R0F_XCLK, 2715 (EM28XX_XCLK_AUDIO_UNMUTE | val)); 2716 2717 em28xx_set_outfmt(dev); 2718 2719 /* Add image controls */ 2720 2721 /* 2722 * NOTE: at this point, the subdevices are already registered, so 2723 * bridge controls are only added/enabled when no subdevice provides 2724 * them 2725 */ 2726 if (!v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST)) 2727 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2728 V4L2_CID_CONTRAST, 2729 0, 0x1f, 1, CONTRAST_DEFAULT); 2730 if (!v4l2_ctrl_find(hdl, V4L2_CID_BRIGHTNESS)) 2731 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2732 V4L2_CID_BRIGHTNESS, 2733 -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT); 2734 if (!v4l2_ctrl_find(hdl, V4L2_CID_SATURATION)) 2735 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2736 V4L2_CID_SATURATION, 2737 0, 0x1f, 1, SATURATION_DEFAULT); 2738 if (!v4l2_ctrl_find(hdl, V4L2_CID_BLUE_BALANCE)) 2739 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2740 V4L2_CID_BLUE_BALANCE, 2741 -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT); 2742 if (!v4l2_ctrl_find(hdl, V4L2_CID_RED_BALANCE)) 2743 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2744 V4L2_CID_RED_BALANCE, 2745 -0x30, 0x30, 1, RED_BALANCE_DEFAULT); 2746 if (!v4l2_ctrl_find(hdl, V4L2_CID_SHARPNESS)) 2747 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2748 V4L2_CID_SHARPNESS, 2749 0, 0x0f, 1, SHARPNESS_DEFAULT); 2750 2751 /* Reset image controls */ 2752 em28xx_colorlevels_set_default(dev); 2753 v4l2_ctrl_handler_setup(hdl); 2754 ret = hdl->error; 2755 if (ret) 2756 goto unregister_dev; 2757 2758 /* allocate and fill video video_device struct */ 2759 em28xx_vdev_init(dev, &v4l2->vdev, &em28xx_video_template, "video"); 2760 mutex_init(&v4l2->vb_queue_lock); 2761 mutex_init(&v4l2->vb_vbi_queue_lock); 2762 v4l2->vdev.queue = &v4l2->vb_vidq; 2763 v4l2->vdev.queue->lock = &v4l2->vb_queue_lock; 2764 v4l2->vdev.device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VIDEO_CAPTURE | 2765 V4L2_CAP_STREAMING; 2766 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE) 2767 v4l2->vdev.device_caps |= V4L2_CAP_AUDIO; 2768 if (dev->tuner_type != TUNER_ABSENT) 2769 v4l2->vdev.device_caps |= V4L2_CAP_TUNER; 2770 2771 2772 /* disable inapplicable ioctls */ 2773 if (dev->is_webcam) { 2774 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_QUERYSTD); 2775 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_STD); 2776 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_STD); 2777 } else { 2778 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_PARM); 2779 } 2780 if (dev->tuner_type == TUNER_ABSENT) { 2781 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_TUNER); 2782 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_TUNER); 2783 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_FREQUENCY); 2784 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_FREQUENCY); 2785 } 2786 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) { 2787 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_AUDIO); 2788 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_AUDIO); 2789 } 2790 2791 /* register v4l2 video video_device */ 2792 ret = video_register_device(&v4l2->vdev, VFL_TYPE_VIDEO, 2793 video_nr[dev->devno]); 2794 if (ret) { 2795 dev_err(&dev->intf->dev, 2796 "unable to register video device (error=%i).\n", ret); 2797 goto unregister_dev; 2798 } 2799 2800 /* Allocate and fill vbi video_device struct */ 2801 if (em28xx_vbi_supported(dev) == 1) { 2802 em28xx_vdev_init(dev, &v4l2->vbi_dev, &em28xx_video_template, 2803 "vbi"); 2804 2805 v4l2->vbi_dev.queue = &v4l2->vb_vbiq; 2806 v4l2->vbi_dev.queue->lock = &v4l2->vb_vbi_queue_lock; 2807 v4l2->vbi_dev.device_caps = V4L2_CAP_STREAMING | 2808 V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE; 2809 if (dev->tuner_type != TUNER_ABSENT) 2810 v4l2->vbi_dev.device_caps |= V4L2_CAP_TUNER; 2811 2812 /* disable inapplicable ioctls */ 2813 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_PARM); 2814 if (dev->tuner_type == TUNER_ABSENT) { 2815 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_TUNER); 2816 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_TUNER); 2817 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_FREQUENCY); 2818 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_FREQUENCY); 2819 } 2820 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) { 2821 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_AUDIO); 2822 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_AUDIO); 2823 } 2824 2825 /* register v4l2 vbi video_device */ 2826 ret = video_register_device(&v4l2->vbi_dev, VFL_TYPE_VBI, 2827 vbi_nr[dev->devno]); 2828 if (ret < 0) { 2829 dev_err(&dev->intf->dev, 2830 "unable to register vbi device\n"); 2831 goto unregister_dev; 2832 } 2833 } 2834 2835 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) { 2836 em28xx_vdev_init(dev, &v4l2->radio_dev, &em28xx_radio_template, 2837 "radio"); 2838 v4l2->radio_dev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER; 2839 ret = video_register_device(&v4l2->radio_dev, VFL_TYPE_RADIO, 2840 radio_nr[dev->devno]); 2841 if (ret < 0) { 2842 dev_err(&dev->intf->dev, 2843 "can't register radio device\n"); 2844 goto unregister_dev; 2845 } 2846 dev_info(&dev->intf->dev, 2847 "Registered radio device as %s\n", 2848 video_device_node_name(&v4l2->radio_dev)); 2849 } 2850 2851 /* Init entities at the Media Controller */ 2852 em28xx_v4l2_create_entities(dev); 2853 2854#ifdef CONFIG_MEDIA_CONTROLLER 2855 ret = v4l2_mc_create_media_graph(dev->media_dev); 2856 if (ret) { 2857 dev_err(&dev->intf->dev, 2858 "failed to create media graph\n"); 2859 em28xx_v4l2_media_release(dev); 2860 goto unregister_dev; 2861 } 2862#endif 2863 2864 dev_info(&dev->intf->dev, 2865 "V4L2 video device registered as %s\n", 2866 video_device_node_name(&v4l2->vdev)); 2867 2868 if (video_is_registered(&v4l2->vbi_dev)) 2869 dev_info(&dev->intf->dev, 2870 "V4L2 VBI device registered as %s\n", 2871 video_device_node_name(&v4l2->vbi_dev)); 2872 2873 /* Save some power by putting tuner to sleep */ 2874 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby); 2875 2876 /* initialize videobuf2 stuff */ 2877 em28xx_vb2_setup(dev); 2878 2879 dev_info(&dev->intf->dev, 2880 "V4L2 extension successfully initialized\n"); 2881 2882 kref_get(&dev->ref); 2883 2884 mutex_unlock(&dev->lock); 2885 return 0; 2886 2887unregister_dev: 2888 if (video_is_registered(&v4l2->radio_dev)) { 2889 dev_info(&dev->intf->dev, 2890 "V4L2 device %s deregistered\n", 2891 video_device_node_name(&v4l2->radio_dev)); 2892 video_unregister_device(&v4l2->radio_dev); 2893 } 2894 if (video_is_registered(&v4l2->vbi_dev)) { 2895 dev_info(&dev->intf->dev, 2896 "V4L2 device %s deregistered\n", 2897 video_device_node_name(&v4l2->vbi_dev)); 2898 video_unregister_device(&v4l2->vbi_dev); 2899 } 2900 if (video_is_registered(&v4l2->vdev)) { 2901 dev_info(&dev->intf->dev, 2902 "V4L2 device %s deregistered\n", 2903 video_device_node_name(&v4l2->vdev)); 2904 video_unregister_device(&v4l2->vdev); 2905 } 2906 2907 v4l2_ctrl_handler_free(&v4l2->ctrl_handler); 2908 v4l2_device_unregister(&v4l2->v4l2_dev); 2909err: 2910 dev->v4l2 = NULL; 2911 kref_put(&v4l2->ref, em28xx_free_v4l2); 2912 mutex_unlock(&dev->lock); 2913 return ret; 2914} 2915 2916static struct em28xx_ops v4l2_ops = { 2917 .id = EM28XX_V4L2, 2918 .name = "Em28xx v4l2 Extension", 2919 .init = em28xx_v4l2_init, 2920 .fini = em28xx_v4l2_fini, 2921 .suspend = em28xx_v4l2_suspend, 2922 .resume = em28xx_v4l2_resume, 2923}; 2924 2925static int __init em28xx_video_register(void) 2926{ 2927 return em28xx_register_extension(&v4l2_ops); 2928} 2929 2930static void __exit em28xx_video_unregister(void) 2931{ 2932 em28xx_unregister_extension(&v4l2_ops); 2933} 2934 2935module_init(em28xx_video_register); 2936module_exit(em28xx_video_unregister); 2937