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 Sch��fer <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#include "em28xx.h" 16 17#include <linux/init.h> 18#include <linux/list.h> 19#include <linux/module.h> 20#include <linux/kernel.h> 21#include <linux/bitmap.h> 22#include <linux/usb.h> 23#include <linux/i2c.h> 24#include <linux/mm.h> 25#include <linux/mutex.h> 26#include <linux/slab.h> 27 28#include "em28xx-v4l.h" 29#include <media/v4l2-common.h> 30#include <media/v4l2-ioctl.h> 31#include <media/v4l2-event.h> 32#include <media/drv-intf/msp3400.h> 33#include <media/tuner.h> 34 35#define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \ 36 "Markus Rechberger <mrechberger@gmail.com>, " \ 37 "Mauro Carvalho Chehab <mchehab@kernel.org>, " \ 38 "Sascha Sommer <saschasommer@freenet.de>" 39 40static unsigned int isoc_debug; 41module_param(isoc_debug, int, 0644); 42MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]"); 43 44static unsigned int disable_vbi; 45module_param(disable_vbi, int, 0644); 46MODULE_PARM_DESC(disable_vbi, "disable vbi support"); 47 48static int alt; 49module_param(alt, int, 0644); 50MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint"); 51 52#define em28xx_videodbg(fmt, arg...) do { \ 53 if (video_debug) \ 54 dev_printk(KERN_DEBUG, &dev->intf->dev, \ 55 "video: %s: " fmt, __func__, ## arg); \ 56} while (0) 57 58#define em28xx_isocdbg(fmt, arg...) do {\ 59 if (isoc_debug) \ 60 dev_printk(KERN_DEBUG, &dev->intf->dev, \ 61 "isoc: %s: " fmt, __func__, ## arg); \ 62} while (0) 63 64MODULE_AUTHOR(DRIVER_AUTHOR); 65MODULE_DESCRIPTION(DRIVER_DESC " - v4l2 interface"); 66MODULE_LICENSE("GPL v2"); 67MODULE_VERSION(EM28XX_VERSION); 68 69#define EM25XX_FRMDATAHDR_BYTE1 0x02 70#define EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE 0x20 71#define EM25XX_FRMDATAHDR_BYTE2_FRAME_END 0x02 72#define EM25XX_FRMDATAHDR_BYTE2_FRAME_ID 0x01 73#define EM25XX_FRMDATAHDR_BYTE2_MASK (EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE | \ 74 EM25XX_FRMDATAHDR_BYTE2_FRAME_END | \ 75 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID) 76 77static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; 78static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; 79static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; 80 81module_param_array(video_nr, int, NULL, 0444); 82module_param_array(vbi_nr, int, NULL, 0444); 83module_param_array(radio_nr, int, NULL, 0444); 84MODULE_PARM_DESC(video_nr, "video device numbers"); 85MODULE_PARM_DESC(vbi_nr, "vbi device numbers"); 86MODULE_PARM_DESC(radio_nr, "radio device numbers"); 87 88static unsigned int video_debug; 89module_param(video_debug, int, 0644); 90MODULE_PARM_DESC(video_debug, "enable debug messages [video]"); 91 92/* supported video standards */ 93static struct em28xx_fmt format[] = { 94 { 95 .fourcc = V4L2_PIX_FMT_YUYV, 96 .depth = 16, 97 .reg = EM28XX_OUTFMT_YUV422_Y0UY1V, 98 }, { 99 .fourcc = V4L2_PIX_FMT_RGB565, 100 .depth = 16, 101 .reg = EM28XX_OUTFMT_RGB_16_656, 102 }, { 103 .fourcc = V4L2_PIX_FMT_SRGGB8, 104 .depth = 8, 105 .reg = EM28XX_OUTFMT_RGB_8_RGRG, 106 }, { 107 .fourcc = V4L2_PIX_FMT_SBGGR8, 108 .depth = 8, 109 .reg = EM28XX_OUTFMT_RGB_8_BGBG, 110 }, { 111 .fourcc = V4L2_PIX_FMT_SGRBG8, 112 .depth = 8, 113 .reg = EM28XX_OUTFMT_RGB_8_GRGR, 114 }, { 115 .fourcc = V4L2_PIX_FMT_SGBRG8, 116 .depth = 8, 117 .reg = EM28XX_OUTFMT_RGB_8_GBGB, 118 }, { 119 .fourcc = V4L2_PIX_FMT_YUV411P, 120 .depth = 12, 121 .reg = EM28XX_OUTFMT_YUV411, 122 }, 123}; 124 125/*FIXME: maxw should be dependent of alt mode */ 126static inline unsigned int norm_maxw(struct em28xx *dev) 127{ 128 struct em28xx_v4l2 *v4l2 = dev->v4l2; 129 130 if (dev->is_webcam) 131 return v4l2->sensor_xres; 132 133 if (dev->board.max_range_640_480) 134 return 640; 135 136 return 720; 137} 138 139static inline unsigned int norm_maxh(struct em28xx *dev) 140{ 141 struct em28xx_v4l2 *v4l2 = dev->v4l2; 142 143 if (dev->is_webcam) 144 return v4l2->sensor_yres; 145 146 if (dev->board.max_range_640_480) 147 return 480; 148 149 return (v4l2->norm & V4L2_STD_625_50) ? 576 : 480; 150} 151 152static int em28xx_vbi_supported(struct em28xx *dev) 153{ 154 /* Modprobe option to manually disable */ 155 if (disable_vbi == 1) 156 return 0; 157 158 if (dev->is_webcam) 159 return 0; 160 161 /* FIXME: check subdevices for VBI support */ 162 163 if (dev->chip_id == CHIP_ID_EM2860 || 164 dev->chip_id == CHIP_ID_EM2883) 165 return 1; 166 167 /* Version of em28xx that does not support VBI */ 168 return 0; 169} 170 171/* 172 * em28xx_wake_i2c() 173 * configure i2c attached devices 174 */ 175static void em28xx_wake_i2c(struct em28xx *dev) 176{ 177 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev; 178 179 v4l2_device_call_all(v4l2_dev, 0, core, reset, 0); 180 v4l2_device_call_all(v4l2_dev, 0, video, s_routing, 181 INPUT(dev->ctl_input)->vmux, 0, 0); 182} 183 184static int em28xx_colorlevels_set_default(struct em28xx *dev) 185{ 186 em28xx_write_reg(dev, EM28XX_R20_YGAIN, CONTRAST_DEFAULT); 187 em28xx_write_reg(dev, EM28XX_R21_YOFFSET, BRIGHTNESS_DEFAULT); 188 em28xx_write_reg(dev, EM28XX_R22_UVGAIN, SATURATION_DEFAULT); 189 em28xx_write_reg(dev, EM28XX_R23_UOFFSET, BLUE_BALANCE_DEFAULT); 190 em28xx_write_reg(dev, EM28XX_R24_VOFFSET, RED_BALANCE_DEFAULT); 191 em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, SHARPNESS_DEFAULT); 192 193 em28xx_write_reg(dev, EM28XX_R14_GAMMA, 0x20); 194 em28xx_write_reg(dev, EM28XX_R15_RGAIN, 0x20); 195 em28xx_write_reg(dev, EM28XX_R16_GGAIN, 0x20); 196 em28xx_write_reg(dev, EM28XX_R17_BGAIN, 0x20); 197 em28xx_write_reg(dev, EM28XX_R18_ROFFSET, 0x00); 198 em28xx_write_reg(dev, EM28XX_R19_GOFFSET, 0x00); 199 return em28xx_write_reg(dev, EM28XX_R1A_BOFFSET, 0x00); 200} 201 202static int em28xx_set_outfmt(struct em28xx *dev) 203{ 204 int ret; 205 u8 fmt, vinctrl; 206 struct em28xx_v4l2 *v4l2 = dev->v4l2; 207 208 fmt = v4l2->format->reg; 209 if (!dev->is_em25xx) 210 fmt |= 0x20; 211 /* 212 * NOTE: it's not clear if this is really needed ! 213 * The datasheets say bit 5 is a reserved bit and devices seem to work 214 * fine without it. But the Windows driver sets it for em2710/50+em28xx 215 * devices and we've always been setting it, too. 216 * 217 * em2765 (em25xx, em276x/7x/8x) devices do NOT work with this bit set, 218 * it's likely used for an additional (compressed ?) format there. 219 */ 220 ret = em28xx_write_reg(dev, EM28XX_R27_OUTFMT, fmt); 221 if (ret < 0) 222 return ret; 223 224 ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, v4l2->vinmode); 225 if (ret < 0) 226 return ret; 227 228 vinctrl = v4l2->vinctl; 229 if (em28xx_vbi_supported(dev) == 1) { 230 vinctrl |= EM28XX_VINCTRL_VBI_RAW; 231 em28xx_write_reg(dev, EM28XX_R34_VBI_START_H, 0x00); 232 em28xx_write_reg(dev, EM28XX_R36_VBI_WIDTH, 233 v4l2->vbi_width / 4); 234 em28xx_write_reg(dev, EM28XX_R37_VBI_HEIGHT, v4l2->vbi_height); 235 if (v4l2->norm & V4L2_STD_525_60) { 236 /* NTSC */ 237 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x09); 238 } else if (v4l2->norm & V4L2_STD_625_50) { 239 /* PAL */ 240 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x07); 241 } 242 } 243 244 return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, vinctrl); 245} 246 247static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax, 248 u8 ymin, u8 ymax) 249{ 250 em28xx_videodbg("em28xx Scale: (%d,%d)-(%d,%d)\n", 251 xmin, ymin, xmax, ymax); 252 253 em28xx_write_regs(dev, EM28XX_R28_XMIN, &xmin, 1); 254 em28xx_write_regs(dev, EM28XX_R29_XMAX, &xmax, 1); 255 em28xx_write_regs(dev, EM28XX_R2A_YMIN, &ymin, 1); 256 return em28xx_write_regs(dev, EM28XX_R2B_YMAX, &ymax, 1); 257} 258 259static void em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart, 260 u16 width, u16 height) 261{ 262 u8 cwidth = width >> 2; 263 u8 cheight = height >> 2; 264 u8 overflow = (height >> 9 & 0x02) | (width >> 10 & 0x01); 265 /* NOTE: size limit: 2047x1023 = 2MPix */ 266 267 em28xx_videodbg("capture area set to (%d,%d): %dx%d\n", 268 hstart, vstart, 269 ((overflow & 2) << 9 | cwidth << 2), 270 ((overflow & 1) << 10 | cheight << 2)); 271 272 em28xx_write_regs(dev, EM28XX_R1C_HSTART, &hstart, 1); 273 em28xx_write_regs(dev, EM28XX_R1D_VSTART, &vstart, 1); 274 em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, &cwidth, 1); 275 em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, &cheight, 1); 276 em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1); 277 278 /* FIXME: function/meaning of these registers ? */ 279 /* FIXME: align width+height to multiples of 4 ?! */ 280 if (dev->is_em25xx) { 281 em28xx_write_reg(dev, 0x34, width >> 4); 282 em28xx_write_reg(dev, 0x35, height >> 4); 283 } 284} 285 286static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v) 287{ 288 u8 mode = 0x00; 289 /* the em2800 scaler only supports scaling down to 50% */ 290 291 if (dev->board.is_em2800) { 292 mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00); 293 } else { 294 u8 buf[2]; 295 296 buf[0] = h; 297 buf[1] = h >> 8; 298 em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2); 299 300 buf[0] = v; 301 buf[1] = v >> 8; 302 em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2); 303 /* 304 * it seems that both H and V scalers must be active 305 * to work correctly 306 */ 307 mode = (h || v) ? 0x30 : 0x00; 308 } 309 return em28xx_write_reg(dev, EM28XX_R26_COMPR, mode); 310} 311 312/* FIXME: this only function read values from dev */ 313static int em28xx_resolution_set(struct em28xx *dev) 314{ 315 struct em28xx_v4l2 *v4l2 = dev->v4l2; 316 int width = norm_maxw(dev); 317 int height = norm_maxh(dev); 318 319 /* Properly setup VBI */ 320 v4l2->vbi_width = 720; 321 if (v4l2->norm & V4L2_STD_525_60) 322 v4l2->vbi_height = 12; 323 else 324 v4l2->vbi_height = 18; 325 326 em28xx_set_outfmt(dev); 327 328 em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2); 329 330 /* 331 * If we don't set the start position to 2 in VBI mode, we end up 332 * with line 20/21 being YUYV encoded instead of being in 8-bit 333 * greyscale. The core of the issue is that line 21 (and line 23 for 334 * PAL WSS) are inside of active video region, and as a result they 335 * get the pixelformatting associated with that area. So by cropping 336 * it out, we end up with the same format as the rest of the VBI 337 * region 338 */ 339 if (em28xx_vbi_supported(dev) == 1) 340 em28xx_capture_area_set(dev, 0, 2, width, height); 341 else 342 em28xx_capture_area_set(dev, 0, 0, width, height); 343 344 return em28xx_scaler_set(dev, v4l2->hscale, v4l2->vscale); 345} 346 347/* Set USB alternate setting for analog video */ 348static int em28xx_set_alternate(struct em28xx *dev) 349{ 350 struct em28xx_v4l2 *v4l2 = dev->v4l2; 351 struct usb_device *udev = interface_to_usbdev(dev->intf); 352 int err; 353 int i; 354 unsigned int min_pkt_size = v4l2->width * 2 + 4; 355 356 /* 357 * NOTE: for isoc transfers, only alt settings > 0 are allowed 358 * bulk transfers seem to work only with alt=0 ! 359 */ 360 dev->alt = 0; 361 if (alt > 0 && alt < dev->num_alt) { 362 em28xx_videodbg("alternate forced to %d\n", dev->alt); 363 dev->alt = alt; 364 goto set_alt; 365 } 366 if (dev->analog_xfer_bulk) 367 goto set_alt; 368 369 /* 370 * When image size is bigger than a certain value, 371 * the frame size should be increased, otherwise, only 372 * green screen will be received. 373 */ 374 if (v4l2->width * 2 * v4l2->height > 720 * 240 * 2) 375 min_pkt_size *= 2; 376 377 for (i = 0; i < dev->num_alt; i++) { 378 /* stop when the selected alt setting offers enough bandwidth */ 379 if (dev->alt_max_pkt_size_isoc[i] >= min_pkt_size) { 380 dev->alt = i; 381 break; 382 /* 383 * otherwise make sure that we end up with the maximum 384 * bandwidth because the min_pkt_size equation might be wrong. 385 * 386 */ 387 } else if (dev->alt_max_pkt_size_isoc[i] > 388 dev->alt_max_pkt_size_isoc[dev->alt]) 389 dev->alt = i; 390 } 391 392set_alt: 393 /* 394 * NOTE: for bulk transfers, we need to call usb_set_interface() 395 * even if the previous settings were the same. Otherwise streaming 396 * fails with all urbs having status = -EOVERFLOW ! 397 */ 398 if (dev->analog_xfer_bulk) { 399 dev->max_pkt_size = 512; /* USB 2.0 spec */ 400 dev->packet_multiplier = EM28XX_BULK_PACKET_MULTIPLIER; 401 } else { /* isoc */ 402 em28xx_videodbg("minimum isoc packet size: %u (alt=%d)\n", 403 min_pkt_size, dev->alt); 404 dev->max_pkt_size = 405 dev->alt_max_pkt_size_isoc[dev->alt]; 406 dev->packet_multiplier = EM28XX_NUM_ISOC_PACKETS; 407 } 408 em28xx_videodbg("setting alternate %d with wMaxPacketSize=%u\n", 409 dev->alt, dev->max_pkt_size); 410 err = usb_set_interface(udev, dev->ifnum, dev->alt); 411 if (err < 0) { 412 dev_err(&dev->intf->dev, 413 "cannot change alternate number to %d (error=%i)\n", 414 dev->alt, err); 415 return err; 416 } 417 return 0; 418} 419 420/* 421 * DMA and thread functions 422 */ 423 424/* 425 * Finish the current buffer 426 */ 427static inline void finish_buffer(struct em28xx *dev, 428 struct em28xx_buffer *buf) 429{ 430 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field); 431 432 buf->vb.sequence = dev->v4l2->field_count++; 433 if (dev->v4l2->progressive) 434 buf->vb.field = V4L2_FIELD_NONE; 435 else 436 buf->vb.field = V4L2_FIELD_INTERLACED; 437 buf->vb.vb2_buf.timestamp = ktime_get_ns(); 438 439 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE); 440} 441 442/* 443 * Copy picture data from USB buffer to video buffer 444 */ 445static void em28xx_copy_video(struct em28xx *dev, 446 struct em28xx_buffer *buf, 447 unsigned char *usb_buf, 448 unsigned long len) 449{ 450 struct em28xx_v4l2 *v4l2 = dev->v4l2; 451 void *fieldstart, *startwrite, *startread; 452 int linesdone, currlinedone, offset, lencopy, remain; 453 int bytesperline = v4l2->width << 1; 454 455 if (buf->pos + len > buf->length) 456 len = buf->length - buf->pos; 457 458 startread = usb_buf; 459 remain = len; 460 461 if (v4l2->progressive || buf->top_field) 462 fieldstart = buf->vb_buf; 463 else /* interlaced mode, even nr. of lines */ 464 fieldstart = buf->vb_buf + bytesperline; 465 466 linesdone = buf->pos / bytesperline; 467 currlinedone = buf->pos % bytesperline; 468 469 if (v4l2->progressive) 470 offset = linesdone * bytesperline + currlinedone; 471 else 472 offset = linesdone * bytesperline * 2 + currlinedone; 473 474 startwrite = fieldstart + offset; 475 lencopy = bytesperline - currlinedone; 476 lencopy = lencopy > remain ? remain : lencopy; 477 478 if ((char *)startwrite + lencopy > (char *)buf->vb_buf + buf->length) { 479 em28xx_isocdbg("Overflow of %zu bytes past buffer end (1)\n", 480 ((char *)startwrite + lencopy) - 481 ((char *)buf->vb_buf + buf->length)); 482 remain = (char *)buf->vb_buf + buf->length - 483 (char *)startwrite; 484 lencopy = remain; 485 } 486 if (lencopy <= 0) 487 return; 488 memcpy(startwrite, startread, lencopy); 489 490 remain -= lencopy; 491 492 while (remain > 0) { 493 if (v4l2->progressive) 494 startwrite += lencopy; 495 else 496 startwrite += lencopy + bytesperline; 497 startread += lencopy; 498 if (bytesperline > remain) 499 lencopy = remain; 500 else 501 lencopy = bytesperline; 502 503 if ((char *)startwrite + lencopy > (char *)buf->vb_buf + 504 buf->length) { 505 em28xx_isocdbg("Overflow of %zu bytes past buffer end(2)\n", 506 ((char *)startwrite + lencopy) - 507 ((char *)buf->vb_buf + buf->length)); 508 remain = (char *)buf->vb_buf + buf->length - 509 (char *)startwrite; 510 lencopy = remain; 511 } 512 if (lencopy <= 0) 513 break; 514 515 memcpy(startwrite, startread, lencopy); 516 517 remain -= lencopy; 518 } 519 520 buf->pos += len; 521} 522 523/* 524 * Copy VBI data from USB buffer to video buffer 525 */ 526static void em28xx_copy_vbi(struct em28xx *dev, 527 struct em28xx_buffer *buf, 528 unsigned char *usb_buf, 529 unsigned long len) 530{ 531 unsigned int offset; 532 533 if (buf->pos + len > buf->length) 534 len = buf->length - buf->pos; 535 536 offset = buf->pos; 537 /* Make sure the bottom field populates the second half of the frame */ 538 if (buf->top_field == 0) 539 offset += dev->v4l2->vbi_width * dev->v4l2->vbi_height; 540 541 memcpy(buf->vb_buf + offset, usb_buf, len); 542 buf->pos += len; 543} 544 545static inline void print_err_status(struct em28xx *dev, 546 int packet, int status) 547{ 548 char *errmsg = "Unknown"; 549 550 switch (status) { 551 case -ENOENT: 552 errmsg = "unlinked synchronously"; 553 break; 554 case -ECONNRESET: 555 errmsg = "unlinked asynchronously"; 556 break; 557 case -ENOSR: 558 errmsg = "Buffer error (overrun)"; 559 break; 560 case -EPIPE: 561 errmsg = "Stalled (device not responding)"; 562 break; 563 case -EOVERFLOW: 564 errmsg = "Babble (bad cable?)"; 565 break; 566 case -EPROTO: 567 errmsg = "Bit-stuff error (bad cable?)"; 568 break; 569 case -EILSEQ: 570 errmsg = "CRC/Timeout (could be anything)"; 571 break; 572 case -ETIME: 573 errmsg = "Device does not respond"; 574 break; 575 } 576 if (packet < 0) { 577 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg); 578 } else { 579 em28xx_isocdbg("URB packet %d, status %d [%s].\n", 580 packet, status, errmsg); 581 } 582} 583 584/* 585 * get the next available buffer from dma queue 586 */ 587static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev, 588 struct em28xx_dmaqueue *dma_q) 589{ 590 struct em28xx_buffer *buf; 591 592 if (list_empty(&dma_q->active)) { 593 em28xx_isocdbg("No active queue to serve\n"); 594 return NULL; 595 } 596 597 /* Get the next buffer */ 598 buf = list_entry(dma_q->active.next, struct em28xx_buffer, list); 599 /* Cleans up buffer - Useful for testing for frame/URB loss */ 600 list_del(&buf->list); 601 buf->pos = 0; 602 buf->vb_buf = buf->mem; 603 604 return buf; 605} 606 607/* 608 * Finish the current buffer if completed and prepare for the next field 609 */ 610static struct em28xx_buffer * 611finish_field_prepare_next(struct em28xx *dev, 612 struct em28xx_buffer *buf, 613 struct em28xx_dmaqueue *dma_q) 614{ 615 struct em28xx_v4l2 *v4l2 = dev->v4l2; 616 617 if (v4l2->progressive || v4l2->top_field) { /* Brand new frame */ 618 if (buf) 619 finish_buffer(dev, buf); 620 buf = get_next_buf(dev, dma_q); 621 } 622 if (buf) { 623 buf->top_field = v4l2->top_field; 624 buf->pos = 0; 625 } 626 627 return buf; 628} 629 630/* 631 * Process data packet according to the em2710/em2750/em28xx frame data format 632 */ 633static inline void process_frame_data_em28xx(struct em28xx *dev, 634 unsigned char *data_pkt, 635 unsigned int data_len) 636{ 637 struct em28xx_v4l2 *v4l2 = dev->v4l2; 638 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf; 639 struct em28xx_buffer *vbi_buf = dev->usb_ctl.vbi_buf; 640 struct em28xx_dmaqueue *dma_q = &dev->vidq; 641 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq; 642 643 /* 644 * capture type 0 = vbi start 645 * capture type 1 = vbi in progress 646 * capture type 2 = video start 647 * capture type 3 = video in progress 648 */ 649 if (data_len >= 4) { 650 /* 651 * NOTE: Headers are always 4 bytes and 652 * never split across packets 653 */ 654 if (data_pkt[0] == 0x88 && data_pkt[1] == 0x88 && 655 data_pkt[2] == 0x88 && data_pkt[3] == 0x88) { 656 /* Continuation */ 657 data_pkt += 4; 658 data_len -= 4; 659 } else if (data_pkt[0] == 0x33 && data_pkt[1] == 0x95) { 660 /* Field start (VBI mode) */ 661 v4l2->capture_type = 0; 662 v4l2->vbi_read = 0; 663 em28xx_isocdbg("VBI START HEADER !!!\n"); 664 v4l2->top_field = !(data_pkt[2] & 1); 665 data_pkt += 4; 666 data_len -= 4; 667 } else if (data_pkt[0] == 0x22 && data_pkt[1] == 0x5a) { 668 /* Field start (VBI disabled) */ 669 v4l2->capture_type = 2; 670 em28xx_isocdbg("VIDEO START HEADER !!!\n"); 671 v4l2->top_field = !(data_pkt[2] & 1); 672 data_pkt += 4; 673 data_len -= 4; 674 } 675 } 676 /* 677 * NOTE: With bulk transfers, intermediate data packets 678 * have no continuation header 679 */ 680 681 if (v4l2->capture_type == 0) { 682 vbi_buf = finish_field_prepare_next(dev, vbi_buf, vbi_dma_q); 683 dev->usb_ctl.vbi_buf = vbi_buf; 684 v4l2->capture_type = 1; 685 } 686 687 if (v4l2->capture_type == 1) { 688 int vbi_size = v4l2->vbi_width * v4l2->vbi_height; 689 int vbi_data_len = ((v4l2->vbi_read + data_len) > vbi_size) ? 690 (vbi_size - v4l2->vbi_read) : data_len; 691 692 /* Copy VBI data */ 693 if (vbi_buf) 694 em28xx_copy_vbi(dev, vbi_buf, data_pkt, vbi_data_len); 695 v4l2->vbi_read += vbi_data_len; 696 697 if (vbi_data_len < data_len) { 698 /* Continue with copying video data */ 699 v4l2->capture_type = 2; 700 data_pkt += vbi_data_len; 701 data_len -= vbi_data_len; 702 } 703 } 704 705 if (v4l2->capture_type == 2) { 706 buf = finish_field_prepare_next(dev, buf, dma_q); 707 dev->usb_ctl.vid_buf = buf; 708 v4l2->capture_type = 3; 709 } 710 711 if (v4l2->capture_type == 3 && buf && data_len > 0) 712 em28xx_copy_video(dev, buf, data_pkt, data_len); 713} 714 715/* 716 * Process data packet according to the em25xx/em276x/7x/8x frame data format 717 */ 718static inline void process_frame_data_em25xx(struct em28xx *dev, 719 unsigned char *data_pkt, 720 unsigned int data_len) 721{ 722 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf; 723 struct em28xx_dmaqueue *dmaq = &dev->vidq; 724 struct em28xx_v4l2 *v4l2 = dev->v4l2; 725 bool frame_end = false; 726 727 /* Check for header */ 728 /* 729 * NOTE: at least with bulk transfers, only the first packet 730 * has a header and has always set the FRAME_END bit 731 */ 732 if (data_len >= 2) { /* em25xx header is only 2 bytes long */ 733 if ((data_pkt[0] == EM25XX_FRMDATAHDR_BYTE1) && 734 ((data_pkt[1] & ~EM25XX_FRMDATAHDR_BYTE2_MASK) == 0x00)) { 735 v4l2->top_field = !(data_pkt[1] & 736 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID); 737 frame_end = data_pkt[1] & 738 EM25XX_FRMDATAHDR_BYTE2_FRAME_END; 739 data_pkt += 2; 740 data_len -= 2; 741 } 742 743 /* Finish field and prepare next (BULK only) */ 744 if (dev->analog_xfer_bulk && frame_end) { 745 buf = finish_field_prepare_next(dev, buf, dmaq); 746 dev->usb_ctl.vid_buf = buf; 747 } 748 /* 749 * NOTE: in ISOC mode when a new frame starts and buf==NULL, 750 * we COULD already prepare a buffer here to avoid skipping the 751 * first frame. 752 */ 753 } 754 755 /* Copy data */ 756 if (buf && data_len > 0) 757 em28xx_copy_video(dev, buf, data_pkt, data_len); 758 759 /* Finish frame (ISOC only) => avoids lag of 1 frame */ 760 if (!dev->analog_xfer_bulk && frame_end) { 761 buf = finish_field_prepare_next(dev, buf, dmaq); 762 dev->usb_ctl.vid_buf = buf; 763 } 764 765 /* 766 * NOTES: 767 * 768 * 1) Tested with USB bulk transfers only ! 769 * The wording in the datasheet suggests that isoc might work different. 770 * The current code assumes that with isoc transfers each packet has a 771 * header like with the other em28xx devices. 772 * 773 * 2) Support for interlaced mode is pure theory. It has not been 774 * tested and it is unknown if these devices actually support it. 775 */ 776} 777 778/* Processes and copies the URB data content (video and VBI data) */ 779static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb) 780{ 781 int xfer_bulk, num_packets, i; 782 unsigned char *usb_data_pkt; 783 unsigned int usb_data_len; 784 785 if (!dev) 786 return 0; 787 788 if (dev->disconnected) 789 return 0; 790 791 if (urb->status < 0) 792 print_err_status(dev, -1, urb->status); 793 794 xfer_bulk = usb_pipebulk(urb->pipe); 795 796 if (xfer_bulk) /* bulk */ 797 num_packets = 1; 798 else /* isoc */ 799 num_packets = urb->number_of_packets; 800 801 for (i = 0; i < num_packets; i++) { 802 if (xfer_bulk) { /* bulk */ 803 usb_data_len = urb->actual_length; 804 805 usb_data_pkt = urb->transfer_buffer; 806 } else { /* isoc */ 807 if (urb->iso_frame_desc[i].status < 0) { 808 print_err_status(dev, i, 809 urb->iso_frame_desc[i].status); 810 if (urb->iso_frame_desc[i].status != -EPROTO) 811 continue; 812 } 813 814 usb_data_len = urb->iso_frame_desc[i].actual_length; 815 if (usb_data_len > dev->max_pkt_size) { 816 em28xx_isocdbg("packet bigger than packet size"); 817 continue; 818 } 819 820 usb_data_pkt = urb->transfer_buffer + 821 urb->iso_frame_desc[i].offset; 822 } 823 824 if (usb_data_len == 0) { 825 /* NOTE: happens very often with isoc transfers */ 826 /* em28xx_usbdbg("packet %d is empty",i); - spammy */ 827 continue; 828 } 829 830 if (dev->is_em25xx) 831 process_frame_data_em25xx(dev, 832 usb_data_pkt, usb_data_len); 833 else 834 process_frame_data_em28xx(dev, 835 usb_data_pkt, usb_data_len); 836 } 837 return 1; 838} 839 840static int get_resource(enum v4l2_buf_type f_type) 841{ 842 switch (f_type) { 843 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 844 return EM28XX_RESOURCE_VIDEO; 845 case V4L2_BUF_TYPE_VBI_CAPTURE: 846 return EM28XX_RESOURCE_VBI; 847 default: 848 WARN_ON(1); 849 return -1; /* Indicate that device is busy */ 850 } 851} 852 853/* Usage lock check functions */ 854static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type) 855{ 856 int res_type = get_resource(f_type); 857 858 /* is it free? */ 859 if (dev->resources & res_type) { 860 /* no, someone else uses it */ 861 return -EBUSY; 862 } 863 864 /* it's free, grab it */ 865 dev->resources |= res_type; 866 em28xx_videodbg("res: get %d\n", res_type); 867 return 0; 868} 869 870static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type) 871{ 872 int res_type = get_resource(f_type); 873 874 dev->resources &= ~res_type; 875 em28xx_videodbg("res: put %d\n", res_type); 876} 877 878static void em28xx_v4l2_media_release(struct em28xx *dev) 879{ 880#ifdef CONFIG_MEDIA_CONTROLLER 881 int i; 882 883 for (i = 0; i < MAX_EM28XX_INPUT; i++) { 884 if (!INPUT(i)->type) 885 return; 886 media_device_unregister_entity(&dev->input_ent[i]); 887 } 888#endif 889} 890 891/* 892 * Media Controller helper functions 893 */ 894 895static int em28xx_enable_analog_tuner(struct em28xx *dev) 896{ 897#ifdef CONFIG_MEDIA_CONTROLLER 898 struct media_device *mdev = dev->media_dev; 899 struct em28xx_v4l2 *v4l2 = dev->v4l2; 900 struct media_entity *source; 901 struct media_link *link, *found_link = NULL; 902 int ret, active_links = 0; 903 904 if (!mdev || !v4l2->decoder) 905 return 0; 906 907 /* 908 * This will find the tuner that is connected into the decoder. 909 * Technically, this is not 100% correct, as the device may be 910 * using an analog input instead of the tuner. However, as we can't 911 * do DVB streaming while the DMA engine is being used for V4L2, 912 * this should be enough for the actual needs. 913 */ 914 list_for_each_entry(link, &v4l2->decoder->links, list) { 915 if (link->sink->entity == v4l2->decoder) { 916 found_link = link; 917 if (link->flags & MEDIA_LNK_FL_ENABLED) 918 active_links++; 919 break; 920 } 921 } 922 923 if (active_links == 1 || !found_link) 924 return 0; 925 926 source = found_link->source->entity; 927 list_for_each_entry(link, &source->links, list) { 928 struct media_entity *sink; 929 int flags = 0; 930 931 sink = link->sink->entity; 932 933 if (sink == v4l2->decoder) 934 flags = MEDIA_LNK_FL_ENABLED; 935 936 ret = media_entity_setup_link(link, flags); 937 if (ret) { 938 dev_err(&dev->intf->dev, 939 "Couldn't change link %s->%s to %s. Error %d\n", 940 source->name, sink->name, 941 flags ? "enabled" : "disabled", 942 ret); 943 return ret; 944 } 945 946 em28xx_videodbg("link %s->%s was %s\n", 947 source->name, sink->name, 948 flags ? "ENABLED" : "disabled"); 949 } 950#endif 951 return 0; 952} 953 954static const char * const iname[] = { 955 [EM28XX_VMUX_COMPOSITE] = "Composite", 956 [EM28XX_VMUX_SVIDEO] = "S-Video", 957 [EM28XX_VMUX_TELEVISION] = "Television", 958 [EM28XX_RADIO] = "Radio", 959}; 960 961static void em28xx_v4l2_create_entities(struct em28xx *dev) 962{ 963#if defined(CONFIG_MEDIA_CONTROLLER) 964 struct em28xx_v4l2 *v4l2 = dev->v4l2; 965 int ret, i; 966 967 /* Initialize Video, VBI and Radio pads */ 968 v4l2->video_pad.flags = MEDIA_PAD_FL_SINK; 969 ret = media_entity_pads_init(&v4l2->vdev.entity, 1, &v4l2->video_pad); 970 if (ret < 0) 971 dev_err(&dev->intf->dev, 972 "failed to initialize video media entity!\n"); 973 974 if (em28xx_vbi_supported(dev)) { 975 v4l2->vbi_pad.flags = MEDIA_PAD_FL_SINK; 976 ret = media_entity_pads_init(&v4l2->vbi_dev.entity, 1, 977 &v4l2->vbi_pad); 978 if (ret < 0) 979 dev_err(&dev->intf->dev, 980 "failed to initialize vbi media entity!\n"); 981 } 982 983 /* Webcams don't have input connectors */ 984 if (dev->is_webcam) 985 return; 986 987 /* Create entities for each input connector */ 988 for (i = 0; i < MAX_EM28XX_INPUT; i++) { 989 struct media_entity *ent = &dev->input_ent[i]; 990 991 if (!INPUT(i)->type) 992 break; 993 994 ent->name = iname[INPUT(i)->type]; 995 ent->flags = MEDIA_ENT_FL_CONNECTOR; 996 dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE; 997 998 switch (INPUT(i)->type) { 999 case EM28XX_VMUX_COMPOSITE: 1000 ent->function = MEDIA_ENT_F_CONN_COMPOSITE; 1001 break; 1002 case EM28XX_VMUX_SVIDEO: 1003 ent->function = MEDIA_ENT_F_CONN_SVIDEO; 1004 break; 1005 default: /* EM28XX_VMUX_TELEVISION or EM28XX_RADIO */ 1006 if (dev->tuner_type != TUNER_ABSENT) 1007 ent->function = MEDIA_ENT_F_CONN_RF; 1008 break; 1009 } 1010 1011 ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]); 1012 if (ret < 0) 1013 dev_err(&dev->intf->dev, 1014 "failed to initialize input pad[%d]!\n", i); 1015 1016 ret = media_device_register_entity(dev->media_dev, ent); 1017 if (ret < 0) 1018 dev_err(&dev->intf->dev, 1019 "failed to register input entity %d!\n", i); 1020 } 1021#endif 1022} 1023 1024/* 1025 * Videobuf2 operations 1026 */ 1027 1028static int queue_setup(struct vb2_queue *vq, 1029 unsigned int *nbuffers, unsigned int *nplanes, 1030 unsigned int sizes[], struct device *alloc_devs[]) 1031{ 1032 struct em28xx *dev = vb2_get_drv_priv(vq); 1033 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1034 unsigned long size = 1035 (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3; 1036 1037 if (*nplanes) 1038 return sizes[0] < size ? -EINVAL : 0; 1039 *nplanes = 1; 1040 sizes[0] = size; 1041 1042 em28xx_enable_analog_tuner(dev); 1043 1044 return 0; 1045} 1046 1047static int 1048buffer_prepare(struct vb2_buffer *vb) 1049{ 1050 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 1051 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue); 1052 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1053 unsigned long size; 1054 1055 em28xx_videodbg("%s, field=%d\n", __func__, vbuf->field); 1056 1057 size = (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3; 1058 1059 if (vb2_plane_size(vb, 0) < size) { 1060 em28xx_videodbg("%s data will not fit into plane (%lu < %lu)\n", 1061 __func__, vb2_plane_size(vb, 0), size); 1062 return -EINVAL; 1063 } 1064 vb2_set_plane_payload(vb, 0, size); 1065 1066 return 0; 1067} 1068 1069int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count) 1070{ 1071 struct em28xx *dev = vb2_get_drv_priv(vq); 1072 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1073 struct v4l2_frequency f; 1074 struct v4l2_fh *owner; 1075 int rc = 0; 1076 1077 em28xx_videodbg("%s\n", __func__); 1078 1079 dev->v4l2->field_count = 0; 1080 1081 /* 1082 * Make sure streaming is not already in progress for this type 1083 * of filehandle (e.g. video, vbi) 1084 */ 1085 rc = res_get(dev, vq->type); 1086 if (rc) 1087 return rc; 1088 1089 if (v4l2->streaming_users == 0) { 1090 /* First active streaming user, so allocate all the URBs */ 1091 1092 /* Allocate the USB bandwidth */ 1093 em28xx_set_alternate(dev); 1094 1095 /* 1096 * Needed, since GPIO might have disabled power of 1097 * some i2c device 1098 */ 1099 em28xx_wake_i2c(dev); 1100 1101 v4l2->capture_type = -1; 1102 rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE, 1103 dev->analog_xfer_bulk, 1104 EM28XX_NUM_BUFS, 1105 dev->max_pkt_size, 1106 dev->packet_multiplier, 1107 em28xx_urb_data_copy); 1108 if (rc < 0) 1109 return rc; 1110 1111 /* 1112 * djh: it's not clear whether this code is still needed. I'm 1113 * leaving it in here for now entirely out of concern for 1114 * backward compatibility (the old code did it) 1115 */ 1116 1117 /* Ask tuner to go to analog or radio mode */ 1118 memset(&f, 0, sizeof(f)); 1119 f.frequency = v4l2->frequency; 1120 owner = (struct v4l2_fh *)vq->owner; 1121 if (owner && owner->vdev->vfl_type == VFL_TYPE_RADIO) 1122 f.type = V4L2_TUNER_RADIO; 1123 else 1124 f.type = V4L2_TUNER_ANALOG_TV; 1125 v4l2_device_call_all(&v4l2->v4l2_dev, 1126 0, tuner, s_frequency, &f); 1127 1128 /* Enable video stream at TV decoder */ 1129 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 1); 1130 } 1131 1132 v4l2->streaming_users++; 1133 1134 return rc; 1135} 1136 1137static void em28xx_stop_streaming(struct vb2_queue *vq) 1138{ 1139 struct em28xx *dev = vb2_get_drv_priv(vq); 1140 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1141 struct em28xx_dmaqueue *vidq = &dev->vidq; 1142 unsigned long flags = 0; 1143 1144 em28xx_videodbg("%s\n", __func__); 1145 1146 res_free(dev, vq->type); 1147 1148 if (v4l2->streaming_users-- == 1) { 1149 /* Disable video stream at TV decoder */ 1150 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0); 1151 1152 /* Last active user, so shutdown all the URBS */ 1153 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); 1154 } 1155 1156 spin_lock_irqsave(&dev->slock, flags); 1157 if (dev->usb_ctl.vid_buf) { 1158 vb2_buffer_done(&dev->usb_ctl.vid_buf->vb.vb2_buf, 1159 VB2_BUF_STATE_ERROR); 1160 dev->usb_ctl.vid_buf = NULL; 1161 } 1162 while (!list_empty(&vidq->active)) { 1163 struct em28xx_buffer *buf; 1164 1165 buf = list_entry(vidq->active.next, struct em28xx_buffer, list); 1166 list_del(&buf->list); 1167 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 1168 } 1169 spin_unlock_irqrestore(&dev->slock, flags); 1170} 1171 1172void em28xx_stop_vbi_streaming(struct vb2_queue *vq) 1173{ 1174 struct em28xx *dev = vb2_get_drv_priv(vq); 1175 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1176 struct em28xx_dmaqueue *vbiq = &dev->vbiq; 1177 unsigned long flags = 0; 1178 1179 em28xx_videodbg("%s\n", __func__); 1180 1181 res_free(dev, vq->type); 1182 1183 if (v4l2->streaming_users-- == 1) { 1184 /* Disable video stream at TV decoder */ 1185 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0); 1186 1187 /* Last active user, so shutdown all the URBS */ 1188 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); 1189 } 1190 1191 spin_lock_irqsave(&dev->slock, flags); 1192 if (dev->usb_ctl.vbi_buf) { 1193 vb2_buffer_done(&dev->usb_ctl.vbi_buf->vb.vb2_buf, 1194 VB2_BUF_STATE_ERROR); 1195 dev->usb_ctl.vbi_buf = NULL; 1196 } 1197 while (!list_empty(&vbiq->active)) { 1198 struct em28xx_buffer *buf; 1199 1200 buf = list_entry(vbiq->active.next, struct em28xx_buffer, list); 1201 list_del(&buf->list); 1202 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 1203 } 1204 spin_unlock_irqrestore(&dev->slock, flags); 1205} 1206 1207static void 1208buffer_queue(struct vb2_buffer *vb) 1209{ 1210 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 1211 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue); 1212 struct em28xx_buffer *buf = 1213 container_of(vbuf, struct em28xx_buffer, vb); 1214 struct em28xx_dmaqueue *vidq = &dev->vidq; 1215 unsigned long flags = 0; 1216 1217 em28xx_videodbg("%s\n", __func__); 1218 buf->mem = vb2_plane_vaddr(vb, 0); 1219 buf->length = vb2_plane_size(vb, 0); 1220 1221 spin_lock_irqsave(&dev->slock, flags); 1222 list_add_tail(&buf->list, &vidq->active); 1223 spin_unlock_irqrestore(&dev->slock, flags); 1224} 1225 1226static const struct vb2_ops em28xx_video_qops = { 1227 .queue_setup = queue_setup, 1228 .buf_prepare = buffer_prepare, 1229 .buf_queue = buffer_queue, 1230 .start_streaming = em28xx_start_analog_streaming, 1231 .stop_streaming = em28xx_stop_streaming, 1232 .wait_prepare = vb2_ops_wait_prepare, 1233 .wait_finish = vb2_ops_wait_finish, 1234}; 1235 1236static int em28xx_vb2_setup(struct em28xx *dev) 1237{ 1238 int rc; 1239 struct vb2_queue *q; 1240 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1241 1242 /* Setup Videobuf2 for Video capture */ 1243 q = &v4l2->vb_vidq; 1244 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1245 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF; 1246 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1247 q->drv_priv = dev; 1248 q->buf_struct_size = sizeof(struct em28xx_buffer); 1249 q->ops = &em28xx_video_qops; 1250 q->mem_ops = &vb2_vmalloc_memops; 1251 1252 rc = vb2_queue_init(q); 1253 if (rc < 0) 1254 return rc; 1255 1256 /* Setup Videobuf2 for VBI capture */ 1257 q = &v4l2->vb_vbiq; 1258 q->type = V4L2_BUF_TYPE_VBI_CAPTURE; 1259 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR; 1260 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1261 q->drv_priv = dev; 1262 q->buf_struct_size = sizeof(struct em28xx_buffer); 1263 q->ops = &em28xx_vbi_qops; 1264 q->mem_ops = &vb2_vmalloc_memops; 1265 1266 rc = vb2_queue_init(q); 1267 if (rc < 0) 1268 return rc; 1269 1270 return 0; 1271} 1272 1273/* 1274 * v4l2 interface 1275 */ 1276 1277static void video_mux(struct em28xx *dev, int index) 1278{ 1279 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev; 1280 1281 dev->ctl_input = index; 1282 dev->ctl_ainput = INPUT(index)->amux; 1283 dev->ctl_aoutput = INPUT(index)->aout; 1284 1285 if (!dev->ctl_aoutput) 1286 dev->ctl_aoutput = EM28XX_AOUT_MASTER; 1287 1288 v4l2_device_call_all(v4l2_dev, 0, video, s_routing, 1289 INPUT(index)->vmux, 0, 0); 1290 1291 if (dev->has_msp34xx) { 1292 if (dev->i2s_speed) { 1293 v4l2_device_call_all(v4l2_dev, 0, audio, 1294 s_i2s_clock_freq, dev->i2s_speed); 1295 } 1296 /* Note: this is msp3400 specific */ 1297 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing, 1298 dev->ctl_ainput, 1299 MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0); 1300 } 1301 1302 if (dev->board.adecoder != EM28XX_NOADECODER) { 1303 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing, 1304 dev->ctl_ainput, dev->ctl_aoutput, 0); 1305 } 1306 1307 em28xx_audio_analog_set(dev); 1308} 1309 1310static void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv) 1311{ 1312 struct em28xx *dev = priv; 1313 1314 /* 1315 * In the case of non-AC97 volume controls, we still need 1316 * to do some setups at em28xx, in order to mute/unmute 1317 * and to adjust audio volume. However, the value ranges 1318 * should be checked by the corresponding V4L subdriver. 1319 */ 1320 switch (ctrl->id) { 1321 case V4L2_CID_AUDIO_MUTE: 1322 dev->mute = ctrl->val; 1323 em28xx_audio_analog_set(dev); 1324 break; 1325 case V4L2_CID_AUDIO_VOLUME: 1326 dev->volume = ctrl->val; 1327 em28xx_audio_analog_set(dev); 1328 break; 1329 } 1330} 1331 1332static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl) 1333{ 1334 struct em28xx_v4l2 *v4l2 = 1335 container_of(ctrl->handler, struct em28xx_v4l2, ctrl_handler); 1336 struct em28xx *dev = v4l2->dev; 1337 int ret = -EINVAL; 1338 1339 switch (ctrl->id) { 1340 case V4L2_CID_AUDIO_MUTE: 1341 dev->mute = ctrl->val; 1342 ret = em28xx_audio_analog_set(dev); 1343 break; 1344 case V4L2_CID_AUDIO_VOLUME: 1345 dev->volume = ctrl->val; 1346 ret = em28xx_audio_analog_set(dev); 1347 break; 1348 case V4L2_CID_CONTRAST: 1349 ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val); 1350 break; 1351 case V4L2_CID_BRIGHTNESS: 1352 ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val); 1353 break; 1354 case V4L2_CID_SATURATION: 1355 ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val); 1356 break; 1357 case V4L2_CID_BLUE_BALANCE: 1358 ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val); 1359 break; 1360 case V4L2_CID_RED_BALANCE: 1361 ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val); 1362 break; 1363 case V4L2_CID_SHARPNESS: 1364 ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val); 1365 break; 1366 } 1367 1368 return (ret < 0) ? ret : 0; 1369} 1370 1371static const struct v4l2_ctrl_ops em28xx_ctrl_ops = { 1372 .s_ctrl = em28xx_s_ctrl, 1373}; 1374 1375static void size_to_scale(struct em28xx *dev, 1376 unsigned int width, unsigned int height, 1377 unsigned int *hscale, unsigned int *vscale) 1378{ 1379 unsigned int maxw = norm_maxw(dev); 1380 unsigned int maxh = norm_maxh(dev); 1381 1382 *hscale = (((unsigned long)maxw) << 12) / width - 4096L; 1383 if (*hscale > EM28XX_HVSCALE_MAX) 1384 *hscale = EM28XX_HVSCALE_MAX; 1385 1386 *vscale = (((unsigned long)maxh) << 12) / height - 4096L; 1387 if (*vscale > EM28XX_HVSCALE_MAX) 1388 *vscale = EM28XX_HVSCALE_MAX; 1389} 1390 1391static void scale_to_size(struct em28xx *dev, 1392 unsigned int hscale, unsigned int vscale, 1393 unsigned int *width, unsigned int *height) 1394{ 1395 unsigned int maxw = norm_maxw(dev); 1396 unsigned int maxh = norm_maxh(dev); 1397 1398 *width = (((unsigned long)maxw) << 12) / (hscale + 4096L); 1399 *height = (((unsigned long)maxh) << 12) / (vscale + 4096L); 1400 1401 /* Don't let width or height to be zero */ 1402 if (*width < 1) 1403 *width = 1; 1404 if (*height < 1) 1405 *height = 1; 1406} 1407 1408/* 1409 * IOCTL vidioc handling 1410 */ 1411 1412static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 1413 struct v4l2_format *f) 1414{ 1415 struct em28xx *dev = video_drvdata(file); 1416 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1417 1418 f->fmt.pix.width = v4l2->width; 1419 f->fmt.pix.height = v4l2->height; 1420 f->fmt.pix.pixelformat = v4l2->format->fourcc; 1421 f->fmt.pix.bytesperline = (v4l2->width * v4l2->format->depth + 7) >> 3; 1422 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * v4l2->height; 1423 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 1424 1425 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */ 1426 if (v4l2->progressive) 1427 f->fmt.pix.field = V4L2_FIELD_NONE; 1428 else 1429 f->fmt.pix.field = v4l2->interlaced_fieldmode ? 1430 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; 1431 return 0; 1432} 1433 1434static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc) 1435{ 1436 unsigned int i; 1437 1438 for (i = 0; i < ARRAY_SIZE(format); i++) 1439 if (format[i].fourcc == fourcc) 1440 return &format[i]; 1441 1442 return NULL; 1443} 1444 1445static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 1446 struct v4l2_format *f) 1447{ 1448 struct em28xx *dev = video_drvdata(file); 1449 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1450 unsigned int width = f->fmt.pix.width; 1451 unsigned int height = f->fmt.pix.height; 1452 unsigned int maxw = norm_maxw(dev); 1453 unsigned int maxh = norm_maxh(dev); 1454 unsigned int hscale, vscale; 1455 struct em28xx_fmt *fmt; 1456 1457 fmt = format_by_fourcc(f->fmt.pix.pixelformat); 1458 if (!fmt) { 1459 fmt = &format[0]; 1460 em28xx_videodbg("Fourcc format (%08x) invalid. Using default (%08x).\n", 1461 f->fmt.pix.pixelformat, fmt->fourcc); 1462 } 1463 1464 if (dev->board.is_em2800) { 1465 /* the em2800 can only scale down to 50% */ 1466 height = height > (3 * maxh / 4) ? maxh : maxh / 2; 1467 width = width > (3 * maxw / 4) ? maxw : maxw / 2; 1468 /* 1469 * MaxPacketSize for em2800 is too small to capture at full 1470 * resolution use half of maxw as the scaler can only scale 1471 * to 50% 1472 */ 1473 if (width == maxw && height == maxh) 1474 width /= 2; 1475 } else { 1476 /* 1477 * width must even because of the YUYV format 1478 * height must be even because of interlacing 1479 */ 1480 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh, 1481 1, 0); 1482 } 1483 /* Avoid division by zero at size_to_scale */ 1484 if (width < 1) 1485 width = 1; 1486 if (height < 1) 1487 height = 1; 1488 1489 size_to_scale(dev, width, height, &hscale, &vscale); 1490 scale_to_size(dev, hscale, vscale, &width, &height); 1491 1492 f->fmt.pix.width = width; 1493 f->fmt.pix.height = height; 1494 f->fmt.pix.pixelformat = fmt->fourcc; 1495 f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3; 1496 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height; 1497 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 1498 if (v4l2->progressive) 1499 f->fmt.pix.field = V4L2_FIELD_NONE; 1500 else 1501 f->fmt.pix.field = v4l2->interlaced_fieldmode ? 1502 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; 1503 1504 return 0; 1505} 1506 1507static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc, 1508 unsigned int width, unsigned int height) 1509{ 1510 struct em28xx_fmt *fmt; 1511 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1512 1513 fmt = format_by_fourcc(fourcc); 1514 if (!fmt) 1515 return -EINVAL; 1516 1517 v4l2->format = fmt; 1518 v4l2->width = width; 1519 v4l2->height = height; 1520 1521 /* set new image size */ 1522 size_to_scale(dev, v4l2->width, v4l2->height, 1523 &v4l2->hscale, &v4l2->vscale); 1524 1525 em28xx_resolution_set(dev); 1526 1527 return 0; 1528} 1529 1530static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 1531 struct v4l2_format *f) 1532{ 1533 struct em28xx *dev = video_drvdata(file); 1534 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1535 1536 if (vb2_is_busy(&v4l2->vb_vidq)) 1537 return -EBUSY; 1538 1539 vidioc_try_fmt_vid_cap(file, priv, f); 1540 1541 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat, 1542 f->fmt.pix.width, f->fmt.pix.height); 1543} 1544 1545static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm) 1546{ 1547 struct em28xx *dev = video_drvdata(file); 1548 1549 *norm = dev->v4l2->norm; 1550 1551 return 0; 1552} 1553 1554static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm) 1555{ 1556 struct em28xx *dev = video_drvdata(file); 1557 1558 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm); 1559 1560 return 0; 1561} 1562 1563static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm) 1564{ 1565 struct em28xx *dev = video_drvdata(file); 1566 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1567 struct v4l2_format f; 1568 1569 if (norm == v4l2->norm) 1570 return 0; 1571 1572 if (v4l2->streaming_users > 0) 1573 return -EBUSY; 1574 1575 v4l2->norm = norm; 1576 1577 /* Adjusts width/height, if needed */ 1578 f.fmt.pix.width = 720; 1579 f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576; 1580 vidioc_try_fmt_vid_cap(file, priv, &f); 1581 1582 /* set new image size */ 1583 v4l2->width = f.fmt.pix.width; 1584 v4l2->height = f.fmt.pix.height; 1585 size_to_scale(dev, v4l2->width, v4l2->height, 1586 &v4l2->hscale, &v4l2->vscale); 1587 1588 em28xx_resolution_set(dev); 1589 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm); 1590 1591 return 0; 1592} 1593 1594static int vidioc_g_parm(struct file *file, void *priv, 1595 struct v4l2_streamparm *p) 1596{ 1597 struct v4l2_subdev_frame_interval ival = { 0 }; 1598 struct em28xx *dev = video_drvdata(file); 1599 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1600 int rc = 0; 1601 1602 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1603 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1604 return -EINVAL; 1605 1606 p->parm.capture.readbuffers = EM28XX_MIN_BUF; 1607 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 1608 if (dev->is_webcam) { 1609 rc = v4l2_device_call_until_err(&v4l2->v4l2_dev, 0, 1610 pad, get_frame_interval, NULL, 1611 &ival); 1612 if (!rc) 1613 p->parm.capture.timeperframe = ival.interval; 1614 } else { 1615 v4l2_video_std_frame_period(v4l2->norm, 1616 &p->parm.capture.timeperframe); 1617 } 1618 1619 return rc; 1620} 1621 1622static int vidioc_s_parm(struct file *file, void *priv, 1623 struct v4l2_streamparm *p) 1624{ 1625 struct em28xx *dev = video_drvdata(file); 1626 struct v4l2_subdev_frame_interval ival = { 1627 0, 1628 p->parm.capture.timeperframe 1629 }; 1630 int rc = 0; 1631 1632 if (!dev->is_webcam) 1633 return -ENOTTY; 1634 1635 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1636 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1637 return -EINVAL; 1638 1639 memset(&p->parm, 0, sizeof(p->parm)); 1640 p->parm.capture.readbuffers = EM28XX_MIN_BUF; 1641 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 1642 rc = v4l2_device_call_until_err(&dev->v4l2->v4l2_dev, 0, 1643 pad, set_frame_interval, NULL, 1644 &ival); 1645 if (!rc) 1646 p->parm.capture.timeperframe = ival.interval; 1647 return rc; 1648} 1649 1650static int vidioc_enum_input(struct file *file, void *priv, 1651 struct v4l2_input *i) 1652{ 1653 struct em28xx *dev = video_drvdata(file); 1654 unsigned int n; 1655 int j; 1656 1657 n = i->index; 1658 if (n >= MAX_EM28XX_INPUT) 1659 return -EINVAL; 1660 if (!INPUT(n)->type) 1661 return -EINVAL; 1662 1663 i->type = V4L2_INPUT_TYPE_CAMERA; 1664 1665 strscpy(i->name, iname[INPUT(n)->type], sizeof(i->name)); 1666 1667 if (INPUT(n)->type == EM28XX_VMUX_TELEVISION) 1668 i->type = V4L2_INPUT_TYPE_TUNER; 1669 1670 i->std = dev->v4l2->vdev.tvnorms; 1671 /* webcams do not have the STD API */ 1672 if (dev->is_webcam) 1673 i->capabilities = 0; 1674 1675 /* Dynamically generates an audioset bitmask */ 1676 i->audioset = 0; 1677 for (j = 0; j < MAX_EM28XX_INPUT; j++) 1678 if (dev->amux_map[j] != EM28XX_AMUX_UNUSED) 1679 i->audioset |= 1 << j; 1680 1681 return 0; 1682} 1683 1684static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 1685{ 1686 struct em28xx *dev = video_drvdata(file); 1687 1688 *i = dev->ctl_input; 1689 1690 return 0; 1691} 1692 1693static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 1694{ 1695 struct em28xx *dev = video_drvdata(file); 1696 1697 if (i >= MAX_EM28XX_INPUT) 1698 return -EINVAL; 1699 if (!INPUT(i)->type) 1700 return -EINVAL; 1701 1702 video_mux(dev, i); 1703 return 0; 1704} 1705 1706static int em28xx_fill_audio_input(struct em28xx *dev, 1707 const char *s, 1708 struct v4l2_audio *a, 1709 unsigned int index) 1710{ 1711 unsigned int idx = dev->amux_map[index]; 1712 1713 /* 1714 * With msp3400, almost all mappings use the default (amux = 0). 1715 * The only one may use a different value is WinTV USB2, where it 1716 * can also be SCART1 input. 1717 * As it is very doubtful that we would see new boards with msp3400, 1718 * let's just reuse the existing switch. 1719 */ 1720 if (dev->has_msp34xx && idx != EM28XX_AMUX_UNUSED) 1721 idx = EM28XX_AMUX_LINE_IN; 1722 1723 switch (idx) { 1724 case EM28XX_AMUX_VIDEO: 1725 strscpy(a->name, "Television", sizeof(a->name)); 1726 break; 1727 case EM28XX_AMUX_LINE_IN: 1728 strscpy(a->name, "Line In", sizeof(a->name)); 1729 break; 1730 case EM28XX_AMUX_VIDEO2: 1731 strscpy(a->name, "Television alt", sizeof(a->name)); 1732 break; 1733 case EM28XX_AMUX_PHONE: 1734 strscpy(a->name, "Phone", sizeof(a->name)); 1735 break; 1736 case EM28XX_AMUX_MIC: 1737 strscpy(a->name, "Mic", sizeof(a->name)); 1738 break; 1739 case EM28XX_AMUX_CD: 1740 strscpy(a->name, "CD", sizeof(a->name)); 1741 break; 1742 case EM28XX_AMUX_AUX: 1743 strscpy(a->name, "Aux", sizeof(a->name)); 1744 break; 1745 case EM28XX_AMUX_PCM_OUT: 1746 strscpy(a->name, "PCM", sizeof(a->name)); 1747 break; 1748 case EM28XX_AMUX_UNUSED: 1749 default: 1750 return -EINVAL; 1751 } 1752 a->index = index; 1753 a->capability = V4L2_AUDCAP_STEREO; 1754 1755 em28xx_videodbg("%s: audio input index %d is '%s'\n", 1756 s, a->index, a->name); 1757 1758 return 0; 1759} 1760 1761static int vidioc_enumaudio(struct file *file, void *fh, struct v4l2_audio *a) 1762{ 1763 struct em28xx *dev = video_drvdata(file); 1764 1765 if (a->index >= MAX_EM28XX_INPUT) 1766 return -EINVAL; 1767 1768 return em28xx_fill_audio_input(dev, __func__, a, a->index); 1769} 1770 1771static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a) 1772{ 1773 struct em28xx *dev = video_drvdata(file); 1774 int i; 1775 1776 for (i = 0; i < MAX_EM28XX_INPUT; i++) 1777 if (dev->ctl_ainput == dev->amux_map[i]) 1778 return em28xx_fill_audio_input(dev, __func__, a, i); 1779 1780 /* Should never happen! */ 1781 return -EINVAL; 1782} 1783 1784static int vidioc_s_audio(struct file *file, void *priv, 1785 const struct v4l2_audio *a) 1786{ 1787 struct em28xx *dev = video_drvdata(file); 1788 int idx, i; 1789 1790 if (a->index >= MAX_EM28XX_INPUT) 1791 return -EINVAL; 1792 1793 idx = dev->amux_map[a->index]; 1794 1795 if (idx == EM28XX_AMUX_UNUSED) 1796 return -EINVAL; 1797 1798 dev->ctl_ainput = idx; 1799 1800 /* 1801 * FIXME: This is wrong, as different inputs at em28xx_cards 1802 * may have different audio outputs. So, the right thing 1803 * to do is to implement VIDIOC_G_AUDOUT/VIDIOC_S_AUDOUT. 1804 * With the current board definitions, this would work fine, 1805 * as, currently, all boards fit. 1806 */ 1807 for (i = 0; i < MAX_EM28XX_INPUT; i++) 1808 if (idx == dev->amux_map[i]) 1809 break; 1810 if (i == MAX_EM28XX_INPUT) 1811 return -EINVAL; 1812 1813 dev->ctl_aoutput = INPUT(i)->aout; 1814 1815 if (!dev->ctl_aoutput) 1816 dev->ctl_aoutput = EM28XX_AOUT_MASTER; 1817 1818 em28xx_videodbg("%s: set audio input to %d\n", __func__, 1819 dev->ctl_ainput); 1820 1821 return 0; 1822} 1823 1824static int vidioc_g_tuner(struct file *file, void *priv, 1825 struct v4l2_tuner *t) 1826{ 1827 struct em28xx *dev = video_drvdata(file); 1828 1829 if (t->index != 0) 1830 return -EINVAL; 1831 1832 strscpy(t->name, "Tuner", sizeof(t->name)); 1833 1834 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t); 1835 return 0; 1836} 1837 1838static int vidioc_s_tuner(struct file *file, void *priv, 1839 const struct v4l2_tuner *t) 1840{ 1841 struct em28xx *dev = video_drvdata(file); 1842 1843 if (t->index != 0) 1844 return -EINVAL; 1845 1846 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t); 1847 return 0; 1848} 1849 1850static int vidioc_g_frequency(struct file *file, void *priv, 1851 struct v4l2_frequency *f) 1852{ 1853 struct em28xx *dev = video_drvdata(file); 1854 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1855 1856 if (f->tuner != 0) 1857 return -EINVAL; 1858 1859 f->frequency = v4l2->frequency; 1860 return 0; 1861} 1862 1863static int vidioc_s_frequency(struct file *file, void *priv, 1864 const struct v4l2_frequency *f) 1865{ 1866 struct v4l2_frequency new_freq = *f; 1867 struct em28xx *dev = video_drvdata(file); 1868 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1869 1870 if (f->tuner != 0) 1871 return -EINVAL; 1872 1873 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_frequency, f); 1874 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, g_frequency, &new_freq); 1875 v4l2->frequency = new_freq.frequency; 1876 1877 return 0; 1878} 1879 1880#ifdef CONFIG_VIDEO_ADV_DEBUG 1881static int vidioc_g_chip_info(struct file *file, void *priv, 1882 struct v4l2_dbg_chip_info *chip) 1883{ 1884 struct em28xx *dev = video_drvdata(file); 1885 1886 if (chip->match.addr > 1) 1887 return -EINVAL; 1888 if (chip->match.addr == 1) 1889 strscpy(chip->name, "ac97", sizeof(chip->name)); 1890 else 1891 strscpy(chip->name, 1892 dev->v4l2->v4l2_dev.name, sizeof(chip->name)); 1893 return 0; 1894} 1895 1896static int em28xx_reg_len(int reg) 1897{ 1898 switch (reg) { 1899 case EM28XX_R40_AC97LSB: 1900 case EM28XX_R30_HSCALELOW: 1901 case EM28XX_R32_VSCALELOW: 1902 return 2; 1903 default: 1904 return 1; 1905 } 1906} 1907 1908static int vidioc_g_register(struct file *file, void *priv, 1909 struct v4l2_dbg_register *reg) 1910{ 1911 struct em28xx *dev = video_drvdata(file); 1912 int ret; 1913 1914 if (reg->match.addr > 1) 1915 return -EINVAL; 1916 if (reg->match.addr) { 1917 ret = em28xx_read_ac97(dev, reg->reg); 1918 if (ret < 0) 1919 return ret; 1920 1921 reg->val = ret; 1922 reg->size = 1; 1923 return 0; 1924 } 1925 1926 /* Match host */ 1927 reg->size = em28xx_reg_len(reg->reg); 1928 if (reg->size == 1) { 1929 ret = em28xx_read_reg(dev, reg->reg); 1930 1931 if (ret < 0) 1932 return ret; 1933 1934 reg->val = ret; 1935 } else { 1936 __le16 val = 0; 1937 1938 ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS, 1939 reg->reg, (char *)&val, 2); 1940 if (ret < 0) 1941 return ret; 1942 1943 reg->val = le16_to_cpu(val); 1944 } 1945 1946 return 0; 1947} 1948 1949static int vidioc_s_register(struct file *file, void *priv, 1950 const struct v4l2_dbg_register *reg) 1951{ 1952 struct em28xx *dev = video_drvdata(file); 1953 __le16 buf; 1954 1955 if (reg->match.addr > 1) 1956 return -EINVAL; 1957 if (reg->match.addr) 1958 return em28xx_write_ac97(dev, reg->reg, reg->val); 1959 1960 /* Match host */ 1961 buf = cpu_to_le16(reg->val); 1962 1963 return em28xx_write_regs(dev, reg->reg, (char *)&buf, 1964 em28xx_reg_len(reg->reg)); 1965} 1966#endif 1967 1968static int vidioc_querycap(struct file *file, void *priv, 1969 struct v4l2_capability *cap) 1970{ 1971 struct em28xx *dev = video_drvdata(file); 1972 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1973 struct usb_device *udev = interface_to_usbdev(dev->intf); 1974 1975 strscpy(cap->driver, "em28xx", sizeof(cap->driver)); 1976 strscpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); 1977 usb_make_path(udev, cap->bus_info, sizeof(cap->bus_info)); 1978 1979 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_READWRITE | 1980 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; 1981 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE) 1982 cap->capabilities |= V4L2_CAP_AUDIO; 1983 if (dev->tuner_type != TUNER_ABSENT) 1984 cap->capabilities |= V4L2_CAP_TUNER; 1985 if (video_is_registered(&v4l2->vbi_dev)) 1986 cap->capabilities |= V4L2_CAP_VBI_CAPTURE; 1987 if (video_is_registered(&v4l2->radio_dev)) 1988 cap->capabilities |= V4L2_CAP_RADIO; 1989 return 0; 1990} 1991 1992static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 1993 struct v4l2_fmtdesc *f) 1994{ 1995 if (unlikely(f->index >= ARRAY_SIZE(format))) 1996 return -EINVAL; 1997 1998 f->pixelformat = format[f->index].fourcc; 1999 2000 return 0; 2001} 2002 2003static int vidioc_enum_framesizes(struct file *file, void *priv, 2004 struct v4l2_frmsizeenum *fsize) 2005{ 2006 struct em28xx *dev = video_drvdata(file); 2007 struct em28xx_fmt *fmt; 2008 unsigned int maxw = norm_maxw(dev); 2009 unsigned int maxh = norm_maxh(dev); 2010 2011 fmt = format_by_fourcc(fsize->pixel_format); 2012 if (!fmt) { 2013 em28xx_videodbg("Fourcc format (%08x) invalid.\n", 2014 fsize->pixel_format); 2015 return -EINVAL; 2016 } 2017 2018 if (dev->board.is_em2800) { 2019 if (fsize->index > 1) 2020 return -EINVAL; 2021 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 2022 fsize->discrete.width = maxw / (1 + fsize->index); 2023 fsize->discrete.height = maxh / (1 + fsize->index); 2024 return 0; 2025 } 2026 2027 if (fsize->index != 0) 2028 return -EINVAL; 2029 2030 /* Report a continuous range */ 2031 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; 2032 scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX, 2033 &fsize->stepwise.min_width, &fsize->stepwise.min_height); 2034 if (fsize->stepwise.min_width < 48) 2035 fsize->stepwise.min_width = 48; 2036 if (fsize->stepwise.min_height < 38) 2037 fsize->stepwise.min_height = 38; 2038 fsize->stepwise.max_width = maxw; 2039 fsize->stepwise.max_height = maxh; 2040 fsize->stepwise.step_width = 1; 2041 fsize->stepwise.step_height = 1; 2042 return 0; 2043} 2044 2045/* RAW VBI ioctls */ 2046 2047static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv, 2048 struct v4l2_format *format) 2049{ 2050 struct em28xx *dev = video_drvdata(file); 2051 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2052 2053 format->fmt.vbi.samples_per_line = v4l2->vbi_width; 2054 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; 2055 format->fmt.vbi.offset = 0; 2056 format->fmt.vbi.flags = 0; 2057 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; 2058 format->fmt.vbi.count[0] = v4l2->vbi_height; 2059 format->fmt.vbi.count[1] = v4l2->vbi_height; 2060 memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved)); 2061 2062 /* Varies by video standard (NTSC, PAL, etc.) */ 2063 if (v4l2->norm & V4L2_STD_525_60) { 2064 /* NTSC */ 2065 format->fmt.vbi.start[0] = 10; 2066 format->fmt.vbi.start[1] = 273; 2067 } else if (v4l2->norm & V4L2_STD_625_50) { 2068 /* PAL */ 2069 format->fmt.vbi.start[0] = 6; 2070 format->fmt.vbi.start[1] = 318; 2071 } 2072 2073 return 0; 2074} 2075 2076/* 2077 * RADIO ESPECIFIC IOCTLS 2078 */ 2079 2080static int radio_g_tuner(struct file *file, void *priv, 2081 struct v4l2_tuner *t) 2082{ 2083 struct em28xx *dev = video_drvdata(file); 2084 2085 if (unlikely(t->index > 0)) 2086 return -EINVAL; 2087 2088 strscpy(t->name, "Radio", sizeof(t->name)); 2089 2090 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t); 2091 2092 return 0; 2093} 2094 2095static int radio_s_tuner(struct file *file, void *priv, 2096 const struct v4l2_tuner *t) 2097{ 2098 struct em28xx *dev = video_drvdata(file); 2099 2100 if (t->index != 0) 2101 return -EINVAL; 2102 2103 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t); 2104 2105 return 0; 2106} 2107 2108/* 2109 * em28xx_free_v4l2() - Free struct em28xx_v4l2 2110 * 2111 * @ref: struct kref for struct em28xx_v4l2 2112 * 2113 * Called when all users of struct em28xx_v4l2 are gone 2114 */ 2115static void em28xx_free_v4l2(struct kref *ref) 2116{ 2117 struct em28xx_v4l2 *v4l2 = container_of(ref, struct em28xx_v4l2, ref); 2118 2119 v4l2->dev->v4l2 = NULL; 2120 kfree(v4l2); 2121} 2122 2123/* 2124 * em28xx_v4l2_open() 2125 * inits the device and starts isoc transfer 2126 */ 2127static int em28xx_v4l2_open(struct file *filp) 2128{ 2129 struct video_device *vdev = video_devdata(filp); 2130 struct em28xx *dev = video_drvdata(filp); 2131 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2132 enum v4l2_buf_type fh_type = 0; 2133 int ret; 2134 2135 switch (vdev->vfl_type) { 2136 case VFL_TYPE_VIDEO: 2137 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2138 break; 2139 case VFL_TYPE_VBI: 2140 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE; 2141 break; 2142 case VFL_TYPE_RADIO: 2143 break; 2144 default: 2145 return -EINVAL; 2146 } 2147 2148 em28xx_videodbg("open dev=%s type=%s users=%d\n", 2149 video_device_node_name(vdev), v4l2_type_names[fh_type], 2150 v4l2->users); 2151 2152 if (mutex_lock_interruptible(&dev->lock)) 2153 return -ERESTARTSYS; 2154 2155 ret = v4l2_fh_open(filp); 2156 if (ret) { 2157 dev_err(&dev->intf->dev, 2158 "%s: v4l2_fh_open() returned error %d\n", 2159 __func__, ret); 2160 mutex_unlock(&dev->lock); 2161 return ret; 2162 } 2163 2164 if (v4l2->users == 0) { 2165 em28xx_set_mode(dev, EM28XX_ANALOG_MODE); 2166 2167 if (vdev->vfl_type != VFL_TYPE_RADIO) 2168 em28xx_resolution_set(dev); 2169 2170 /* 2171 * Needed, since GPIO might have disabled power 2172 * of some i2c devices 2173 */ 2174 em28xx_wake_i2c(dev); 2175 } 2176 2177 if (vdev->vfl_type == VFL_TYPE_RADIO) { 2178 em28xx_videodbg("video_open: setting radio device\n"); 2179 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_radio); 2180 } 2181 2182 kref_get(&dev->ref); 2183 kref_get(&v4l2->ref); 2184 v4l2->users++; 2185 2186 mutex_unlock(&dev->lock); 2187 2188 return 0; 2189} 2190 2191/* 2192 * em28xx_v4l2_fini() 2193 * unregisters the v4l2,i2c and usb devices 2194 * called when the device gets disconnected or at module unload 2195 */ 2196static int em28xx_v4l2_fini(struct em28xx *dev) 2197{ 2198 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2199 2200 if (dev->is_audio_only) { 2201 /* Shouldn't initialize IR for this interface */ 2202 return 0; 2203 } 2204 2205 if (!dev->has_video) { 2206 /* This device does not support the v4l2 extension */ 2207 return 0; 2208 } 2209 2210 if (!v4l2) 2211 return 0; 2212 2213 dev_info(&dev->intf->dev, "Closing video extension\n"); 2214 2215 mutex_lock(&dev->lock); 2216 2217 v4l2_device_disconnect(&v4l2->v4l2_dev); 2218 2219 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); 2220 2221 em28xx_v4l2_media_release(dev); 2222 2223 if (video_is_registered(&v4l2->radio_dev)) { 2224 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n", 2225 video_device_node_name(&v4l2->radio_dev)); 2226 video_unregister_device(&v4l2->radio_dev); 2227 } 2228 if (video_is_registered(&v4l2->vbi_dev)) { 2229 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n", 2230 video_device_node_name(&v4l2->vbi_dev)); 2231 video_unregister_device(&v4l2->vbi_dev); 2232 } 2233 if (video_is_registered(&v4l2->vdev)) { 2234 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n", 2235 video_device_node_name(&v4l2->vdev)); 2236 video_unregister_device(&v4l2->vdev); 2237 } 2238 2239 v4l2_ctrl_handler_free(&v4l2->ctrl_handler); 2240 v4l2_device_unregister(&v4l2->v4l2_dev); 2241 2242 kref_put(&v4l2->ref, em28xx_free_v4l2); 2243 2244 mutex_unlock(&dev->lock); 2245 2246 kref_put(&dev->ref, em28xx_free_device); 2247 2248 return 0; 2249} 2250 2251static int em28xx_v4l2_suspend(struct em28xx *dev) 2252{ 2253 if (dev->is_audio_only) 2254 return 0; 2255 2256 if (!dev->has_video) 2257 return 0; 2258 2259 dev_info(&dev->intf->dev, "Suspending video extension\n"); 2260 em28xx_stop_urbs(dev); 2261 return 0; 2262} 2263 2264static int em28xx_v4l2_resume(struct em28xx *dev) 2265{ 2266 if (dev->is_audio_only) 2267 return 0; 2268 2269 if (!dev->has_video) 2270 return 0; 2271 2272 dev_info(&dev->intf->dev, "Resuming video extension\n"); 2273 /* what do we do here */ 2274 return 0; 2275} 2276 2277/* 2278 * em28xx_v4l2_close() 2279 * stops streaming and deallocates all resources allocated by the v4l2 2280 * calls and ioctls 2281 */ 2282static int em28xx_v4l2_close(struct file *filp) 2283{ 2284 struct em28xx *dev = video_drvdata(filp); 2285 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2286 struct usb_device *udev = interface_to_usbdev(dev->intf); 2287 int err; 2288 2289 em28xx_videodbg("users=%d\n", v4l2->users); 2290 2291 vb2_fop_release(filp); 2292 mutex_lock(&dev->lock); 2293 2294 if (v4l2->users == 1) { 2295 /* No sense to try to write to the device */ 2296 if (dev->disconnected) 2297 goto exit; 2298 2299 /* Save some power by putting tuner to sleep */ 2300 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby); 2301 2302 /* do this before setting alternate! */ 2303 em28xx_set_mode(dev, EM28XX_SUSPEND); 2304 2305 /* set alternate 0 */ 2306 dev->alt = 0; 2307 em28xx_videodbg("setting alternate 0\n"); 2308 err = usb_set_interface(udev, 0, 0); 2309 if (err < 0) { 2310 dev_err(&dev->intf->dev, 2311 "cannot change alternate number to 0 (error=%i)\n", 2312 err); 2313 } 2314 } 2315 2316exit: 2317 v4l2->users--; 2318 kref_put(&v4l2->ref, em28xx_free_v4l2); 2319 mutex_unlock(&dev->lock); 2320 kref_put(&dev->ref, em28xx_free_device); 2321 2322 return 0; 2323} 2324 2325static const struct v4l2_file_operations em28xx_v4l_fops = { 2326 .owner = THIS_MODULE, 2327 .open = em28xx_v4l2_open, 2328 .release = em28xx_v4l2_close, 2329 .read = vb2_fop_read, 2330 .poll = vb2_fop_poll, 2331 .mmap = vb2_fop_mmap, 2332 .unlocked_ioctl = video_ioctl2, 2333}; 2334 2335static const struct v4l2_ioctl_ops video_ioctl_ops = { 2336 .vidioc_querycap = vidioc_querycap, 2337 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 2338 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 2339 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 2340 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 2341 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2342 .vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2343 .vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2344 .vidioc_enum_framesizes = vidioc_enum_framesizes, 2345 .vidioc_enumaudio = vidioc_enumaudio, 2346 .vidioc_g_audio = vidioc_g_audio, 2347 .vidioc_s_audio = vidioc_s_audio, 2348 2349 .vidioc_reqbufs = vb2_ioctl_reqbufs, 2350 .vidioc_create_bufs = vb2_ioctl_create_bufs, 2351 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 2352 .vidioc_querybuf = vb2_ioctl_querybuf, 2353 .vidioc_qbuf = vb2_ioctl_qbuf, 2354 .vidioc_dqbuf = vb2_ioctl_dqbuf, 2355 2356 .vidioc_g_std = vidioc_g_std, 2357 .vidioc_querystd = vidioc_querystd, 2358 .vidioc_s_std = vidioc_s_std, 2359 .vidioc_g_parm = vidioc_g_parm, 2360 .vidioc_s_parm = vidioc_s_parm, 2361 .vidioc_enum_input = vidioc_enum_input, 2362 .vidioc_g_input = vidioc_g_input, 2363 .vidioc_s_input = vidioc_s_input, 2364 .vidioc_streamon = vb2_ioctl_streamon, 2365 .vidioc_streamoff = vb2_ioctl_streamoff, 2366 .vidioc_g_tuner = vidioc_g_tuner, 2367 .vidioc_s_tuner = vidioc_s_tuner, 2368 .vidioc_g_frequency = vidioc_g_frequency, 2369 .vidioc_s_frequency = vidioc_s_frequency, 2370 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 2371 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 2372#ifdef CONFIG_VIDEO_ADV_DEBUG 2373 .vidioc_g_chip_info = vidioc_g_chip_info, 2374 .vidioc_g_register = vidioc_g_register, 2375 .vidioc_s_register = vidioc_s_register, 2376#endif 2377}; 2378 2379static const struct video_device em28xx_video_template = { 2380 .fops = &em28xx_v4l_fops, 2381 .ioctl_ops = &video_ioctl_ops, 2382 .release = video_device_release_empty, 2383 .tvnorms = V4L2_STD_ALL, 2384}; 2385 2386static const struct v4l2_file_operations radio_fops = { 2387 .owner = THIS_MODULE, 2388 .open = em28xx_v4l2_open, 2389 .release = em28xx_v4l2_close, 2390 .unlocked_ioctl = video_ioctl2, 2391}; 2392 2393static const struct v4l2_ioctl_ops radio_ioctl_ops = { 2394 .vidioc_querycap = vidioc_querycap, 2395 .vidioc_g_tuner = radio_g_tuner, 2396 .vidioc_s_tuner = radio_s_tuner, 2397 .vidioc_g_frequency = vidioc_g_frequency, 2398 .vidioc_s_frequency = vidioc_s_frequency, 2399 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 2400 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 2401#ifdef CONFIG_VIDEO_ADV_DEBUG 2402 .vidioc_g_chip_info = vidioc_g_chip_info, 2403 .vidioc_g_register = vidioc_g_register, 2404 .vidioc_s_register = vidioc_s_register, 2405#endif 2406}; 2407 2408static struct video_device em28xx_radio_template = { 2409 .fops = &radio_fops, 2410 .ioctl_ops = &radio_ioctl_ops, 2411 .release = video_device_release_empty, 2412}; 2413 2414/* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */ 2415static unsigned short saa711x_addrs[] = { 2416 0x4a >> 1, 0x48 >> 1, /* SAA7111, SAA7111A and SAA7113 */ 2417 0x42 >> 1, 0x40 >> 1, /* SAA7114, SAA7115 and SAA7118 */ 2418 I2C_CLIENT_END }; 2419 2420static unsigned short tvp5150_addrs[] = { 2421 0xb8 >> 1, 2422 0xba >> 1, 2423 I2C_CLIENT_END 2424}; 2425 2426static unsigned short msp3400_addrs[] = { 2427 0x80 >> 1, 2428 0x88 >> 1, 2429 I2C_CLIENT_END 2430}; 2431 2432/******************************** usb interface ******************************/ 2433 2434static void em28xx_vdev_init(struct em28xx *dev, 2435 struct video_device *vfd, 2436 const struct video_device *template, 2437 const char *type_name) 2438{ 2439 *vfd = *template; 2440 vfd->v4l2_dev = &dev->v4l2->v4l2_dev; 2441 vfd->lock = &dev->lock; 2442 if (dev->is_webcam) 2443 vfd->tvnorms = 0; 2444 2445 snprintf(vfd->name, sizeof(vfd->name), "%s %s", 2446 dev_name(&dev->intf->dev), type_name); 2447 2448 video_set_drvdata(vfd, dev); 2449} 2450 2451static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr) 2452{ 2453 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2454 struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev; 2455 struct tuner_setup tun_setup; 2456 struct v4l2_frequency f; 2457 2458 memset(&tun_setup, 0, sizeof(tun_setup)); 2459 2460 tun_setup.mode_mask = T_ANALOG_TV | T_RADIO; 2461 tun_setup.tuner_callback = em28xx_tuner_callback; 2462 2463 if (dev->board.radio.type) { 2464 tun_setup.type = dev->board.radio.type; 2465 tun_setup.addr = dev->board.radio_addr; 2466 2467 v4l2_device_call_all(v4l2_dev, 2468 0, tuner, s_type_addr, &tun_setup); 2469 } 2470 2471 if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type) { 2472 tun_setup.type = dev->tuner_type; 2473 tun_setup.addr = tuner_addr; 2474 2475 v4l2_device_call_all(v4l2_dev, 2476 0, tuner, s_type_addr, &tun_setup); 2477 } 2478 2479 if (dev->board.tda9887_conf) { 2480 struct v4l2_priv_tun_config tda9887_cfg; 2481 2482 tda9887_cfg.tuner = TUNER_TDA9887; 2483 tda9887_cfg.priv = &dev->board.tda9887_conf; 2484 2485 v4l2_device_call_all(v4l2_dev, 2486 0, tuner, s_config, &tda9887_cfg); 2487 } 2488 2489 if (dev->tuner_type == TUNER_XC2028) { 2490 struct v4l2_priv_tun_config xc2028_cfg; 2491 struct xc2028_ctrl ctl; 2492 2493 memset(&xc2028_cfg, 0, sizeof(xc2028_cfg)); 2494 memset(&ctl, 0, sizeof(ctl)); 2495 2496 em28xx_setup_xc3028(dev, &ctl); 2497 2498 xc2028_cfg.tuner = TUNER_XC2028; 2499 xc2028_cfg.priv = &ctl; 2500 2501 v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg); 2502 } 2503 2504 /* configure tuner */ 2505 f.tuner = 0; 2506 f.type = V4L2_TUNER_ANALOG_TV; 2507 f.frequency = 9076; /* just a magic number */ 2508 v4l2->frequency = f.frequency; 2509 v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency, &f); 2510} 2511 2512static int em28xx_v4l2_init(struct em28xx *dev) 2513{ 2514 u8 val; 2515 int ret; 2516 unsigned int maxw; 2517 struct v4l2_ctrl_handler *hdl; 2518 struct em28xx_v4l2 *v4l2; 2519 2520 if (dev->is_audio_only) { 2521 /* Shouldn't initialize IR for this interface */ 2522 return 0; 2523 } 2524 2525 if (!dev->has_video) { 2526 /* This device does not support the v4l2 extension */ 2527 return 0; 2528 } 2529 2530 dev_info(&dev->intf->dev, "Registering V4L2 extension\n"); 2531 2532 mutex_lock(&dev->lock); 2533 2534 v4l2 = kzalloc(sizeof(*v4l2), GFP_KERNEL); 2535 if (!v4l2) { 2536 mutex_unlock(&dev->lock); 2537 return -ENOMEM; 2538 } 2539 kref_init(&v4l2->ref); 2540 v4l2->dev = dev; 2541 dev->v4l2 = v4l2; 2542 2543#ifdef CONFIG_MEDIA_CONTROLLER 2544 v4l2->v4l2_dev.mdev = dev->media_dev; 2545#endif 2546 ret = v4l2_device_register(&dev->intf->dev, &v4l2->v4l2_dev); 2547 if (ret < 0) { 2548 dev_err(&dev->intf->dev, 2549 "Call to v4l2_device_register() failed!\n"); 2550 goto err; 2551 } 2552 2553 hdl = &v4l2->ctrl_handler; 2554 v4l2_ctrl_handler_init(hdl, 8); 2555 v4l2->v4l2_dev.ctrl_handler = hdl; 2556 2557 if (dev->is_webcam) 2558 v4l2->progressive = true; 2559 2560 /* 2561 * Default format, used for tvp5150 or saa711x output formats 2562 */ 2563 v4l2->vinmode = EM28XX_VINMODE_YUV422_CbYCrY; 2564 v4l2->vinctl = EM28XX_VINCTRL_INTERLACED | 2565 EM28XX_VINCTRL_CCIR656_ENABLE; 2566 2567 /* request some modules */ 2568 2569 if (dev->has_msp34xx) 2570 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2571 &dev->i2c_adap[dev->def_i2c_bus], 2572 "msp3400", 0, msp3400_addrs); 2573 2574 if (dev->board.decoder == EM28XX_SAA711X) 2575 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2576 &dev->i2c_adap[dev->def_i2c_bus], 2577 "saa7115_auto", 0, saa711x_addrs); 2578 2579 if (dev->board.decoder == EM28XX_TVP5150) 2580 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2581 &dev->i2c_adap[dev->def_i2c_bus], 2582 "tvp5150", 0, tvp5150_addrs); 2583 2584 if (dev->board.adecoder == EM28XX_TVAUDIO) 2585 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2586 &dev->i2c_adap[dev->def_i2c_bus], 2587 "tvaudio", dev->board.tvaudio_addr, NULL); 2588 2589 /* Initialize tuner and camera */ 2590 2591 if (dev->board.tuner_type != TUNER_ABSENT) { 2592 unsigned short tuner_addr = dev->board.tuner_addr; 2593 int has_demod = (dev->board.tda9887_conf & TDA9887_PRESENT); 2594 2595 if (dev->board.radio.type) 2596 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2597 &dev->i2c_adap[dev->def_i2c_bus], 2598 "tuner", dev->board.radio_addr, 2599 NULL); 2600 2601 if (has_demod) 2602 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2603 &dev->i2c_adap[dev->def_i2c_bus], 2604 "tuner", 0, 2605 v4l2_i2c_tuner_addrs(ADDRS_DEMOD)); 2606 if (tuner_addr == 0) { 2607 enum v4l2_i2c_tuner_type type = 2608 has_demod ? ADDRS_TV_WITH_DEMOD : ADDRS_TV; 2609 struct v4l2_subdev *sd; 2610 2611 sd = v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2612 &dev->i2c_adap[dev->def_i2c_bus], 2613 "tuner", 0, 2614 v4l2_i2c_tuner_addrs(type)); 2615 2616 if (sd) 2617 tuner_addr = v4l2_i2c_subdev_addr(sd); 2618 } else { 2619 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2620 &dev->i2c_adap[dev->def_i2c_bus], 2621 "tuner", tuner_addr, NULL); 2622 } 2623 2624 em28xx_tuner_setup(dev, tuner_addr); 2625 } 2626 2627 if (dev->em28xx_sensor != EM28XX_NOSENSOR) 2628 em28xx_init_camera(dev); 2629 2630 /* Configure audio */ 2631 ret = em28xx_audio_setup(dev); 2632 if (ret < 0) { 2633 dev_err(&dev->intf->dev, 2634 "%s: Error while setting audio - error [%d]!\n", 2635 __func__, ret); 2636 goto unregister_dev; 2637 } 2638 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) { 2639 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2640 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); 2641 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2642 V4L2_CID_AUDIO_VOLUME, 0, 0x1f, 1, 0x1f); 2643 } else { 2644 /* install the em28xx notify callback */ 2645 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_MUTE), 2646 em28xx_ctrl_notify, dev); 2647 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_VOLUME), 2648 em28xx_ctrl_notify, dev); 2649 } 2650 2651 /* wake i2c devices */ 2652 em28xx_wake_i2c(dev); 2653 2654 /* init video dma queues */ 2655 INIT_LIST_HEAD(&dev->vidq.active); 2656 INIT_LIST_HEAD(&dev->vbiq.active); 2657 2658 if (dev->has_msp34xx) { 2659 /* Send a reset to other chips via gpio */ 2660 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xf7); 2661 if (ret < 0) { 2662 dev_err(&dev->intf->dev, 2663 "%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n", 2664 __func__, ret); 2665 goto unregister_dev; 2666 } 2667 usleep_range(10000, 11000); 2668 2669 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xff); 2670 if (ret < 0) { 2671 dev_err(&dev->intf->dev, 2672 "%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n", 2673 __func__, ret); 2674 goto unregister_dev; 2675 } 2676 usleep_range(10000, 11000); 2677 } 2678 2679 /* set default norm */ 2680 v4l2->norm = V4L2_STD_PAL; 2681 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm); 2682 v4l2->interlaced_fieldmode = EM28XX_INTERLACED_DEFAULT; 2683 2684 /* Analog specific initialization */ 2685 v4l2->format = &format[0]; 2686 2687 maxw = norm_maxw(dev); 2688 /* 2689 * MaxPacketSize for em2800 is too small to capture at full resolution 2690 * use half of maxw as the scaler can only scale to 50% 2691 */ 2692 if (dev->board.is_em2800) 2693 maxw /= 2; 2694 2695 em28xx_set_video_format(dev, format[0].fourcc, 2696 maxw, norm_maxh(dev)); 2697 2698 video_mux(dev, 0); 2699 2700 /* Audio defaults */ 2701 dev->mute = 1; 2702 dev->volume = 0x1f; 2703 2704/* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */ 2705 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK); 2706 em28xx_write_reg(dev, EM28XX_R0F_XCLK, 2707 (EM28XX_XCLK_AUDIO_UNMUTE | val)); 2708 2709 em28xx_set_outfmt(dev); 2710 2711 /* Add image controls */ 2712 2713 /* 2714 * NOTE: at this point, the subdevices are already registered, so 2715 * bridge controls are only added/enabled when no subdevice provides 2716 * them 2717 */ 2718 if (!v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST)) 2719 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2720 V4L2_CID_CONTRAST, 2721 0, 0x1f, 1, CONTRAST_DEFAULT); 2722 if (!v4l2_ctrl_find(hdl, V4L2_CID_BRIGHTNESS)) 2723 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2724 V4L2_CID_BRIGHTNESS, 2725 -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT); 2726 if (!v4l2_ctrl_find(hdl, V4L2_CID_SATURATION)) 2727 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2728 V4L2_CID_SATURATION, 2729 0, 0x1f, 1, SATURATION_DEFAULT); 2730 if (!v4l2_ctrl_find(hdl, V4L2_CID_BLUE_BALANCE)) 2731 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2732 V4L2_CID_BLUE_BALANCE, 2733 -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT); 2734 if (!v4l2_ctrl_find(hdl, V4L2_CID_RED_BALANCE)) 2735 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2736 V4L2_CID_RED_BALANCE, 2737 -0x30, 0x30, 1, RED_BALANCE_DEFAULT); 2738 if (!v4l2_ctrl_find(hdl, V4L2_CID_SHARPNESS)) 2739 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2740 V4L2_CID_SHARPNESS, 2741 0, 0x0f, 1, SHARPNESS_DEFAULT); 2742 2743 /* Reset image controls */ 2744 em28xx_colorlevels_set_default(dev); 2745 v4l2_ctrl_handler_setup(hdl); 2746 ret = hdl->error; 2747 if (ret) 2748 goto unregister_dev; 2749 2750 /* allocate and fill video video_device struct */ 2751 em28xx_vdev_init(dev, &v4l2->vdev, &em28xx_video_template, "video"); 2752 mutex_init(&v4l2->vb_queue_lock); 2753 mutex_init(&v4l2->vb_vbi_queue_lock); 2754 v4l2->vdev.queue = &v4l2->vb_vidq; 2755 v4l2->vdev.queue->lock = &v4l2->vb_queue_lock; 2756 v4l2->vdev.device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VIDEO_CAPTURE | 2757 V4L2_CAP_STREAMING; 2758 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE) 2759 v4l2->vdev.device_caps |= V4L2_CAP_AUDIO; 2760 if (dev->tuner_type != TUNER_ABSENT) 2761 v4l2->vdev.device_caps |= V4L2_CAP_TUNER; 2762 2763 2764 /* disable inapplicable ioctls */ 2765 if (dev->is_webcam) { 2766 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_QUERYSTD); 2767 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_STD); 2768 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_STD); 2769 } else { 2770 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_PARM); 2771 } 2772 if (dev->tuner_type == TUNER_ABSENT) { 2773 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_TUNER); 2774 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_TUNER); 2775 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_FREQUENCY); 2776 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_FREQUENCY); 2777 } 2778 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) { 2779 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_AUDIO); 2780 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_AUDIO); 2781 } 2782 2783 /* register v4l2 video video_device */ 2784 ret = video_register_device(&v4l2->vdev, VFL_TYPE_VIDEO, 2785 video_nr[dev->devno]); 2786 if (ret) { 2787 dev_err(&dev->intf->dev, 2788 "unable to register video device (error=%i).\n", ret); 2789 goto unregister_dev; 2790 } 2791 2792 /* Allocate and fill vbi video_device struct */ 2793 if (em28xx_vbi_supported(dev) == 1) { 2794 em28xx_vdev_init(dev, &v4l2->vbi_dev, &em28xx_video_template, 2795 "vbi"); 2796 2797 v4l2->vbi_dev.queue = &v4l2->vb_vbiq; 2798 v4l2->vbi_dev.queue->lock = &v4l2->vb_vbi_queue_lock; 2799 v4l2->vbi_dev.device_caps = V4L2_CAP_STREAMING | 2800 V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE; 2801 if (dev->tuner_type != TUNER_ABSENT) 2802 v4l2->vbi_dev.device_caps |= V4L2_CAP_TUNER; 2803 2804 /* disable inapplicable ioctls */ 2805 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_PARM); 2806 if (dev->tuner_type == TUNER_ABSENT) { 2807 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_TUNER); 2808 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_TUNER); 2809 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_FREQUENCY); 2810 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_FREQUENCY); 2811 } 2812 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) { 2813 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_AUDIO); 2814 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_AUDIO); 2815 } 2816 2817 /* register v4l2 vbi video_device */ 2818 ret = video_register_device(&v4l2->vbi_dev, VFL_TYPE_VBI, 2819 vbi_nr[dev->devno]); 2820 if (ret < 0) { 2821 dev_err(&dev->intf->dev, 2822 "unable to register vbi device\n"); 2823 goto unregister_dev; 2824 } 2825 } 2826 2827 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) { 2828 em28xx_vdev_init(dev, &v4l2->radio_dev, &em28xx_radio_template, 2829 "radio"); 2830 v4l2->radio_dev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER; 2831 ret = video_register_device(&v4l2->radio_dev, VFL_TYPE_RADIO, 2832 radio_nr[dev->devno]); 2833 if (ret < 0) { 2834 dev_err(&dev->intf->dev, 2835 "can't register radio device\n"); 2836 goto unregister_dev; 2837 } 2838 dev_info(&dev->intf->dev, 2839 "Registered radio device as %s\n", 2840 video_device_node_name(&v4l2->radio_dev)); 2841 } 2842 2843 /* Init entities at the Media Controller */ 2844 em28xx_v4l2_create_entities(dev); 2845 2846#ifdef CONFIG_MEDIA_CONTROLLER 2847 ret = v4l2_mc_create_media_graph(dev->media_dev); 2848 if (ret) { 2849 dev_err(&dev->intf->dev, 2850 "failed to create media graph\n"); 2851 em28xx_v4l2_media_release(dev); 2852 goto unregister_dev; 2853 } 2854#endif 2855 2856 dev_info(&dev->intf->dev, 2857 "V4L2 video device registered as %s\n", 2858 video_device_node_name(&v4l2->vdev)); 2859 2860 if (video_is_registered(&v4l2->vbi_dev)) 2861 dev_info(&dev->intf->dev, 2862 "V4L2 VBI device registered as %s\n", 2863 video_device_node_name(&v4l2->vbi_dev)); 2864 2865 /* Save some power by putting tuner to sleep */ 2866 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby); 2867 2868 /* initialize videobuf2 stuff */ 2869 em28xx_vb2_setup(dev); 2870 2871 dev_info(&dev->intf->dev, 2872 "V4L2 extension successfully initialized\n"); 2873 2874 kref_get(&dev->ref); 2875 2876 mutex_unlock(&dev->lock); 2877 return 0; 2878 2879unregister_dev: 2880 if (video_is_registered(&v4l2->radio_dev)) { 2881 dev_info(&dev->intf->dev, 2882 "V4L2 device %s deregistered\n", 2883 video_device_node_name(&v4l2->radio_dev)); 2884 video_unregister_device(&v4l2->radio_dev); 2885 } 2886 if (video_is_registered(&v4l2->vbi_dev)) { 2887 dev_info(&dev->intf->dev, 2888 "V4L2 device %s deregistered\n", 2889 video_device_node_name(&v4l2->vbi_dev)); 2890 video_unregister_device(&v4l2->vbi_dev); 2891 } 2892 if (video_is_registered(&v4l2->vdev)) { 2893 dev_info(&dev->intf->dev, 2894 "V4L2 device %s deregistered\n", 2895 video_device_node_name(&v4l2->vdev)); 2896 video_unregister_device(&v4l2->vdev); 2897 } 2898 2899 v4l2_ctrl_handler_free(&v4l2->ctrl_handler); 2900 v4l2_device_unregister(&v4l2->v4l2_dev); 2901err: 2902 dev->v4l2 = NULL; 2903 kref_put(&v4l2->ref, em28xx_free_v4l2); 2904 mutex_unlock(&dev->lock); 2905 return ret; 2906} 2907 2908static struct em28xx_ops v4l2_ops = { 2909 .id = EM28XX_V4L2, 2910 .name = "Em28xx v4l2 Extension", 2911 .init = em28xx_v4l2_init, 2912 .fini = em28xx_v4l2_fini, 2913 .suspend = em28xx_v4l2_suspend, 2914 .resume = em28xx_v4l2_resume, 2915}; 2916 2917static int __init em28xx_video_register(void) 2918{ 2919 return em28xx_register_extension(&v4l2_ops); 2920} 2921 2922static void __exit em28xx_video_unregister(void) 2923{ 2924 em28xx_unregister_extension(&v4l2_ops); 2925} 2926 2927module_init(em28xx_video_register); 2928module_exit(em28xx_video_unregister); 2929