drivers/media/usb/em28xx/em28xx-video.c

   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 #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
  40 static unsigned int isoc_debug;
  41 module_param(isoc_debug, int, 0644);
  42 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
  43
  44 static unsigned int disable_vbi;
  45 module_param(disable_vbi, int, 0644);
  46 MODULE_PARM_DESC(disable_vbi, "disable vbi support");
  47
  48 static int alt;
  49 module_param(alt, int, 0644);
  50 MODULE_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
  64 MODULE_AUTHOR(DRIVER_AUTHOR);
  65 MODULE_DESCRIPTION(DRIVER_DESC " - v4l2 interface");
  66 MODULE_LICENSE("GPL v2");
  67 MODULE_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
  77 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
  78 static unsigned int vbi_nr[]   = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
  79 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
  80
  81 module_param_array(video_nr, int, NULL, 0444);
  82 module_param_array(vbi_nr, int, NULL, 0444);
  83 module_param_array(radio_nr, int, NULL, 0444);
  84 MODULE_PARM_DESC(video_nr, "video device numbers");
  85 MODULE_PARM_DESC(vbi_nr,   "vbi device numbers");
  86 MODULE_PARM_DESC(radio_nr, "radio device numbers");
  87
  88 static unsigned int video_debug;
  89 module_param(video_debug, int, 0644);
  90 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
  91
  92 /* supported video standards */
  93 static 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 */
 126 static 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
 139 static 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
 152 static 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  */
 175 static 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
 184 static 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
 202 static 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
 247 static 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
 259 static 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
 286 static 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 */
 313 static 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 */
 348 static 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
 392 set_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  */
 427 static 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  */
 445 static 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  */
 526 static 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
 545 static 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  */
 587 static 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  */
 610 static struct em28xx_buffer *
 611 finish_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  */
 633 static 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  */
 718 static 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) */
 779 static 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
 840 static 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 */
 854 static 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
 870 static 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
 878 static 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
 895 static 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
 954 static 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
 961 static 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
1028 static 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
1047 static int
1048 buffer_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
1069 int 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
1137 static 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
1172 void 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
1207 static void
1208 buffer_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
1226 static 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
1236 static 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
1277 static 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
1310 static 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
1332 static 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
1371 static const struct v4l2_ctrl_ops em28xx_ctrl_ops = {
1372         .s_ctrl = em28xx_s_ctrl,
1373 };
1374
1375 static 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
1391 static 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
1412 static 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
1434 static 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
1445 static 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
1507 static 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
1530 static 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
1545 static 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
1554 static 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
1563 static 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
1594 static 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                                                 video, g_frame_interval, &ival);
1611                 if (!rc)
1612                         p->parm.capture.timeperframe = ival.interval;
1613         } else {
1614                 v4l2_video_std_frame_period(v4l2->norm,
1615                                             &p->parm.capture.timeperframe);
1616         }
1617
1618         return rc;
1619 }
1620
1621 static int vidioc_s_parm(struct file *file, void *priv,
1622                          struct v4l2_streamparm *p)
1623 {
1624         struct em28xx *dev = video_drvdata(file);
1625         struct v4l2_subdev_frame_interval ival = {
1626                 0,
1627                 p->parm.capture.timeperframe
1628         };
1629         int rc = 0;
1630
1631         if (!dev->is_webcam)
1632                 return -ENOTTY;
1633
1634         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1635             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1636                 return -EINVAL;
1637
1638         memset(&p->parm, 0, sizeof(p->parm));
1639         p->parm.capture.readbuffers = EM28XX_MIN_BUF;
1640         p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
1641         rc = v4l2_device_call_until_err(&dev->v4l2->v4l2_dev, 0,
1642                                         video, s_frame_interval, &ival);
1643         if (!rc)
1644                 p->parm.capture.timeperframe = ival.interval;
1645         return rc;
1646 }
1647
1648 static int vidioc_enum_input(struct file *file, void *priv,
1649                              struct v4l2_input *i)
1650 {
1651         struct em28xx *dev = video_drvdata(file);
1652         unsigned int       n;
1653         int j;
1654
1655         n = i->index;
1656         if (n >= MAX_EM28XX_INPUT)
1657                 return -EINVAL;
1658         if (!INPUT(n)->type)
1659                 return -EINVAL;
1660
1661         i->type = V4L2_INPUT_TYPE_CAMERA;
1662
1663         strscpy(i->name, iname[INPUT(n)->type], sizeof(i->name));
1664
1665         if (INPUT(n)->type == EM28XX_VMUX_TELEVISION)
1666                 i->type = V4L2_INPUT_TYPE_TUNER;
1667
1668         i->std = dev->v4l2->vdev.tvnorms;
1669         /* webcams do not have the STD API */
1670         if (dev->is_webcam)
1671                 i->capabilities = 0;
1672
1673         /* Dynamically generates an audioset bitmask */
1674         i->audioset = 0;
1675         for (j = 0; j < MAX_EM28XX_INPUT; j++)
1676                 if (dev->amux_map[j] != EM28XX_AMUX_UNUSED)
1677                         i->audioset |= 1 << j;
1678
1679         return 0;
1680 }
1681
1682 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1683 {
1684         struct em28xx *dev = video_drvdata(file);
1685
1686         *i = dev->ctl_input;
1687
1688         return 0;
1689 }
1690
1691 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1692 {
1693         struct em28xx *dev = video_drvdata(file);
1694
1695         if (i >= MAX_EM28XX_INPUT)
1696                 return -EINVAL;
1697         if (!INPUT(i)->type)
1698                 return -EINVAL;
1699
1700         video_mux(dev, i);
1701         return 0;
1702 }
1703
1704 static int em28xx_fill_audio_input(struct em28xx *dev,
1705                                    const char *s,
1706                                    struct v4l2_audio *a,
1707                                    unsigned int index)
1708 {
1709         unsigned int idx = dev->amux_map[index];
1710
1711         /*
1712          * With msp3400, almost all mappings use the default (amux = 0).
1713          * The only one may use a different value is WinTV USB2, where it
1714          * can also be SCART1 input.
1715          * As it is very doubtful that we would see new boards with msp3400,
1716          * let's just reuse the existing switch.
1717          */
1718         if (dev->has_msp34xx && idx != EM28XX_AMUX_UNUSED)
1719                 idx = EM28XX_AMUX_LINE_IN;
1720
1721         switch (idx) {
1722         case EM28XX_AMUX_VIDEO:
1723                 strscpy(a->name, "Television", sizeof(a->name));
1724                 break;
1725         case EM28XX_AMUX_LINE_IN:
1726                 strscpy(a->name, "Line In", sizeof(a->name));
1727                 break;
1728         case EM28XX_AMUX_VIDEO2:
1729                 strscpy(a->name, "Television alt", sizeof(a->name));
1730                 break;
1731         case EM28XX_AMUX_PHONE:
1732                 strscpy(a->name, "Phone", sizeof(a->name));
1733                 break;
1734         case EM28XX_AMUX_MIC:
1735                 strscpy(a->name, "Mic", sizeof(a->name));
1736                 break;
1737         case EM28XX_AMUX_CD:
1738                 strscpy(a->name, "CD", sizeof(a->name));
1739                 break;
1740         case EM28XX_AMUX_AUX:
1741                 strscpy(a->name, "Aux", sizeof(a->name));
1742                 break;
1743         case EM28XX_AMUX_PCM_OUT:
1744                 strscpy(a->name, "PCM", sizeof(a->name));
1745                 break;
1746         case EM28XX_AMUX_UNUSED:
1747         default:
1748                 return -EINVAL;
1749         }
1750         a->index = index;
1751         a->capability = V4L2_AUDCAP_STEREO;
1752
1753         em28xx_videodbg("%s: audio input index %d is '%s'\n",
1754                         s, a->index, a->name);
1755
1756         return 0;
1757 }
1758
1759 static int vidioc_enumaudio(struct file *file, void *fh, struct v4l2_audio *a)
1760 {
1761         struct em28xx *dev = video_drvdata(file);
1762
1763         if (a->index >= MAX_EM28XX_INPUT)
1764                 return -EINVAL;
1765
1766         return em28xx_fill_audio_input(dev, __func__, a, a->index);
1767 }
1768
1769 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1770 {
1771         struct em28xx *dev = video_drvdata(file);
1772         int i;
1773
1774         for (i = 0; i < MAX_EM28XX_INPUT; i++)
1775                 if (dev->ctl_ainput == dev->amux_map[i])
1776                         return em28xx_fill_audio_input(dev, __func__, a, i);
1777
1778         /* Should never happen! */
1779         return -EINVAL;
1780 }
1781
1782 static int vidioc_s_audio(struct file *file, void *priv,
1783                           const struct v4l2_audio *a)
1784 {
1785         struct em28xx *dev = video_drvdata(file);
1786         int idx, i;
1787
1788         if (a->index >= MAX_EM28XX_INPUT)
1789                 return -EINVAL;
1790
1791         idx = dev->amux_map[a->index];
1792
1793         if (idx == EM28XX_AMUX_UNUSED)
1794                 return -EINVAL;
1795
1796         dev->ctl_ainput = idx;
1797
1798         /*
1799          * FIXME: This is wrong, as different inputs at em28xx_cards
1800          * may have different audio outputs. So, the right thing
1801          * to do is to implement VIDIOC_G_AUDOUT/VIDIOC_S_AUDOUT.
1802          * With the current board definitions, this would work fine,
1803          * as, currently, all boards fit.
1804          */
1805         for (i = 0; i < MAX_EM28XX_INPUT; i++)
1806                 if (idx == dev->amux_map[i])
1807                         break;
1808         if (i == MAX_EM28XX_INPUT)
1809                 return -EINVAL;
1810
1811         dev->ctl_aoutput = INPUT(i)->aout;
1812
1813         if (!dev->ctl_aoutput)
1814                 dev->ctl_aoutput = EM28XX_AOUT_MASTER;
1815
1816         em28xx_videodbg("%s: set audio input to %d\n", __func__,
1817                         dev->ctl_ainput);
1818
1819         return 0;
1820 }
1821
1822 static int vidioc_g_tuner(struct file *file, void *priv,
1823                           struct v4l2_tuner *t)
1824 {
1825         struct em28xx *dev = video_drvdata(file);
1826
1827         if (t->index != 0)
1828                 return -EINVAL;
1829
1830         strscpy(t->name, "Tuner", sizeof(t->name));
1831
1832         v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
1833         return 0;
1834 }
1835
1836 static int vidioc_s_tuner(struct file *file, void *priv,
1837                           const struct v4l2_tuner *t)
1838 {
1839         struct em28xx *dev = video_drvdata(file);
1840
1841         if (t->index != 0)
1842                 return -EINVAL;
1843
1844         v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
1845         return 0;
1846 }
1847
1848 static int vidioc_g_frequency(struct file *file, void *priv,
1849                               struct v4l2_frequency *f)
1850 {
1851         struct em28xx         *dev = video_drvdata(file);
1852         struct em28xx_v4l2    *v4l2 = dev->v4l2;
1853
1854         if (f->tuner != 0)
1855                 return -EINVAL;
1856
1857         f->frequency = v4l2->frequency;
1858         return 0;
1859 }
1860
1861 static int vidioc_s_frequency(struct file *file, void *priv,
1862                               const struct v4l2_frequency *f)
1863 {
1864         struct v4l2_frequency  new_freq = *f;
1865         struct em28xx             *dev  = video_drvdata(file);
1866         struct em28xx_v4l2        *v4l2 = dev->v4l2;
1867
1868         if (f->tuner != 0)
1869                 return -EINVAL;
1870
1871         v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_frequency, f);
1872         v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, g_frequency, &new_freq);
1873         v4l2->frequency = new_freq.frequency;
1874
1875         return 0;
1876 }
1877
1878 #ifdef CONFIG_VIDEO_ADV_DEBUG
1879 static int vidioc_g_chip_info(struct file *file, void *priv,
1880                               struct v4l2_dbg_chip_info *chip)
1881 {
1882         struct em28xx *dev = video_drvdata(file);
1883
1884         if (chip->match.addr > 1)
1885                 return -EINVAL;
1886         if (chip->match.addr == 1)
1887                 strscpy(chip->name, "ac97", sizeof(chip->name));
1888         else
1889                 strscpy(chip->name,
1890                         dev->v4l2->v4l2_dev.name, sizeof(chip->name));
1891         return 0;
1892 }
1893
1894 static int em28xx_reg_len(int reg)
1895 {
1896         switch (reg) {
1897         case EM28XX_R40_AC97LSB:
1898         case EM28XX_R30_HSCALELOW:
1899         case EM28XX_R32_VSCALELOW:
1900                 return 2;
1901         default:
1902                 return 1;
1903         }
1904 }
1905
1906 static int vidioc_g_register(struct file *file, void *priv,
1907                              struct v4l2_dbg_register *reg)
1908 {
1909         struct em28xx *dev = video_drvdata(file);
1910         int ret;
1911
1912         if (reg->match.addr > 1)
1913                 return -EINVAL;
1914         if (reg->match.addr) {
1915                 ret = em28xx_read_ac97(dev, reg->reg);
1916                 if (ret < 0)
1917                         return ret;
1918
1919                 reg->val = ret;
1920                 reg->size = 1;
1921                 return 0;
1922         }
1923
1924         /* Match host */
1925         reg->size = em28xx_reg_len(reg->reg);
1926         if (reg->size == 1) {
1927                 ret = em28xx_read_reg(dev, reg->reg);
1928
1929                 if (ret < 0)
1930                         return ret;
1931
1932                 reg->val = ret;
1933         } else {
1934                 __le16 val = 0;
1935
1936                 ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1937                                                    reg->reg, (char *)&val, 2);
1938                 if (ret < 0)
1939                         return ret;
1940
1941                 reg->val = le16_to_cpu(val);
1942         }
1943
1944         return 0;
1945 }
1946
1947 static int vidioc_s_register(struct file *file, void *priv,
1948                              const struct v4l2_dbg_register *reg)
1949 {
1950         struct em28xx *dev = video_drvdata(file);
1951         __le16 buf;
1952
1953         if (reg->match.addr > 1)
1954                 return -EINVAL;
1955         if (reg->match.addr)
1956                 return em28xx_write_ac97(dev, reg->reg, reg->val);
1957
1958         /* Match host */
1959         buf = cpu_to_le16(reg->val);
1960
1961         return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1962                                em28xx_reg_len(reg->reg));
1963 }
1964 #endif
1965
1966 static int vidioc_querycap(struct file *file, void  *priv,
1967                            struct v4l2_capability *cap)
1968 {
1969         struct em28xx         *dev  = video_drvdata(file);
1970         struct em28xx_v4l2    *v4l2 = dev->v4l2;
1971         struct usb_device *udev = interface_to_usbdev(dev->intf);
1972
1973         strscpy(cap->driver, "em28xx", sizeof(cap->driver));
1974         strscpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1975         usb_make_path(udev, cap->bus_info, sizeof(cap->bus_info));
1976
1977         cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_READWRITE |
1978                             V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1979         if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE)
1980                 cap->capabilities |= V4L2_CAP_AUDIO;
1981         if (dev->tuner_type != TUNER_ABSENT)
1982                 cap->capabilities |= V4L2_CAP_TUNER;
1983         if (video_is_registered(&v4l2->vbi_dev))
1984                 cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
1985         if (video_is_registered(&v4l2->radio_dev))
1986                 cap->capabilities |= V4L2_CAP_RADIO;
1987         return 0;
1988 }
1989
1990 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
1991                                    struct v4l2_fmtdesc *f)
1992 {
1993         if (unlikely(f->index >= ARRAY_SIZE(format)))
1994                 return -EINVAL;
1995
1996         f->pixelformat = format[f->index].fourcc;
1997
1998         return 0;
1999 }
2000
2001 static int vidioc_enum_framesizes(struct file *file, void *priv,
2002                                   struct v4l2_frmsizeenum *fsize)
2003 {
2004         struct em28xx         *dev = video_drvdata(file);
2005         struct em28xx_fmt     *fmt;
2006         unsigned int          maxw = norm_maxw(dev);
2007         unsigned int          maxh = norm_maxh(dev);
2008
2009         fmt = format_by_fourcc(fsize->pixel_format);
2010         if (!fmt) {
2011                 em28xx_videodbg("Fourcc format (%08x) invalid.\n",
2012                                 fsize->pixel_format);
2013                 return -EINVAL;
2014         }
2015
2016         if (dev->board.is_em2800) {
2017                 if (fsize->index > 1)
2018                         return -EINVAL;
2019                 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
2020                 fsize->discrete.width = maxw / (1 + fsize->index);
2021                 fsize->discrete.height = maxh / (1 + fsize->index);
2022                 return 0;
2023         }
2024
2025         if (fsize->index != 0)
2026                 return -EINVAL;
2027
2028         /* Report a continuous range */
2029         fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
2030         scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX,
2031                       &fsize->stepwise.min_width, &fsize->stepwise.min_height);
2032         if (fsize->stepwise.min_width < 48)
2033                 fsize->stepwise.min_width = 48;
2034         if (fsize->stepwise.min_height < 38)
2035                 fsize->stepwise.min_height = 38;
2036         fsize->stepwise.max_width = maxw;
2037         fsize->stepwise.max_height = maxh;
2038         fsize->stepwise.step_width = 1;
2039         fsize->stepwise.step_height = 1;
2040         return 0;
2041 }
2042
2043 /* RAW VBI ioctls */
2044
2045 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
2046                                 struct v4l2_format *format)
2047 {
2048         struct em28xx         *dev  = video_drvdata(file);
2049         struct em28xx_v4l2    *v4l2 = dev->v4l2;
2050
2051         format->fmt.vbi.samples_per_line = v4l2->vbi_width;
2052         format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
2053         format->fmt.vbi.offset = 0;
2054         format->fmt.vbi.flags = 0;
2055         format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
2056         format->fmt.vbi.count[0] = v4l2->vbi_height;
2057         format->fmt.vbi.count[1] = v4l2->vbi_height;
2058         memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));
2059
2060         /* Varies by video standard (NTSC, PAL, etc.) */
2061         if (v4l2->norm & V4L2_STD_525_60) {
2062                 /* NTSC */
2063                 format->fmt.vbi.start[0] = 10;
2064                 format->fmt.vbi.start[1] = 273;
2065         } else if (v4l2->norm & V4L2_STD_625_50) {
2066                 /* PAL */
2067                 format->fmt.vbi.start[0] = 6;
2068                 format->fmt.vbi.start[1] = 318;
2069         }
2070
2071         return 0;
2072 }
2073
2074 /*
2075  * RADIO ESPECIFIC IOCTLS
2076  */
2077
2078 static int radio_g_tuner(struct file *file, void *priv,
2079                          struct v4l2_tuner *t)
2080 {
2081         struct em28xx *dev = video_drvdata(file);
2082
2083         if (unlikely(t->index > 0))
2084                 return -EINVAL;
2085
2086         strscpy(t->name, "Radio", sizeof(t->name));
2087
2088         v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
2089
2090         return 0;
2091 }
2092
2093 static int radio_s_tuner(struct file *file, void *priv,
2094                          const struct v4l2_tuner *t)
2095 {
2096         struct em28xx *dev = video_drvdata(file);
2097
2098         if (t->index != 0)
2099                 return -EINVAL;
2100
2101         v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
2102
2103         return 0;
2104 }
2105
2106 /*
2107  * em28xx_free_v4l2() - Free struct em28xx_v4l2
2108  *
2109  * @ref: struct kref for struct em28xx_v4l2
2110  *
2111  * Called when all users of struct em28xx_v4l2 are gone
2112  */
2113 static void em28xx_free_v4l2(struct kref *ref)
2114 {
2115         struct em28xx_v4l2 *v4l2 = container_of(ref, struct em28xx_v4l2, ref);
2116
2117         v4l2->dev->v4l2 = NULL;
2118         kfree(v4l2);
2119 }
2120
2121 /*
2122  * em28xx_v4l2_open()
2123  * inits the device and starts isoc transfer
2124  */
2125 static int em28xx_v4l2_open(struct file *filp)
2126 {
2127         struct video_device *vdev = video_devdata(filp);
2128         struct em28xx *dev = video_drvdata(filp);
2129         struct em28xx_v4l2 *v4l2 = dev->v4l2;
2130         enum v4l2_buf_type fh_type = 0;
2131         int ret;
2132
2133         switch (vdev->vfl_type) {
2134         case VFL_TYPE_VIDEO:
2135                 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2136                 break;
2137         case VFL_TYPE_VBI:
2138                 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
2139                 break;
2140         case VFL_TYPE_RADIO:
2141                 break;
2142         default:
2143                 return -EINVAL;
2144         }
2145
2146         em28xx_videodbg("open dev=%s type=%s users=%d\n",
2147                         video_device_node_name(vdev), v4l2_type_names[fh_type],
2148                         v4l2->users);
2149
2150         if (mutex_lock_interruptible(&dev->lock))
2151                 return -ERESTARTSYS;
2152
2153         ret = v4l2_fh_open(filp);
2154         if (ret) {
2155                 dev_err(&dev->intf->dev,
2156                         "%s: v4l2_fh_open() returned error %d\n",
2157                        __func__, ret);
2158                 mutex_unlock(&dev->lock);
2159                 return ret;
2160         }
2161
2162         if (v4l2->users == 0) {
2163                 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
2164
2165                 if (vdev->vfl_type != VFL_TYPE_RADIO)
2166                         em28xx_resolution_set(dev);
2167
2168                 /*
2169                  * Needed, since GPIO might have disabled power
2170                  * of some i2c devices
2171                  */
2172                 em28xx_wake_i2c(dev);
2173         }
2174
2175         if (vdev->vfl_type == VFL_TYPE_RADIO) {
2176                 em28xx_videodbg("video_open: setting radio device\n");
2177                 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_radio);
2178         }
2179
2180         kref_get(&dev->ref);
2181         kref_get(&v4l2->ref);
2182         v4l2->users++;
2183
2184         mutex_unlock(&dev->lock);
2185
2186         return 0;
2187 }
2188
2189 /*
2190  * em28xx_v4l2_fini()
2191  * unregisters the v4l2,i2c and usb devices
2192  * called when the device gets disconnected or at module unload
2193  */
2194 static int em28xx_v4l2_fini(struct em28xx *dev)
2195 {
2196         struct em28xx_v4l2 *v4l2 = dev->v4l2;
2197
2198         if (dev->is_audio_only) {
2199                 /* Shouldn't initialize IR for this interface */
2200                 return 0;
2201         }
2202
2203         if (!dev->has_video) {
2204                 /* This device does not support the v4l2 extension */
2205                 return 0;
2206         }
2207
2208         if (!v4l2)
2209                 return 0;
2210
2211         dev_info(&dev->intf->dev, "Closing video extension\n");
2212
2213         mutex_lock(&dev->lock);
2214
2215         v4l2_device_disconnect(&v4l2->v4l2_dev);
2216
2217         em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
2218
2219         em28xx_v4l2_media_release(dev);
2220
2221         if (video_is_registered(&v4l2->radio_dev)) {
2222                 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2223                          video_device_node_name(&v4l2->radio_dev));
2224                 video_unregister_device(&v4l2->radio_dev);
2225         }
2226         if (video_is_registered(&v4l2->vbi_dev)) {
2227                 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2228                          video_device_node_name(&v4l2->vbi_dev));
2229                 video_unregister_device(&v4l2->vbi_dev);
2230         }
2231         if (video_is_registered(&v4l2->vdev)) {
2232                 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n",
2233                          video_device_node_name(&v4l2->vdev));
2234                 video_unregister_device(&v4l2->vdev);
2235         }
2236
2237         v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
2238         v4l2_device_unregister(&v4l2->v4l2_dev);
2239
2240         kref_put(&v4l2->ref, em28xx_free_v4l2);
2241
2242         mutex_unlock(&dev->lock);
2243
2244         kref_put(&dev->ref, em28xx_free_device);
2245
2246         return 0;
2247 }
2248
2249 static int em28xx_v4l2_suspend(struct em28xx *dev)
2250 {
2251         if (dev->is_audio_only)
2252                 return 0;
2253
2254         if (!dev->has_video)
2255                 return 0;
2256
2257         dev_info(&dev->intf->dev, "Suspending video extension\n");
2258         em28xx_stop_urbs(dev);
2259         return 0;
2260 }
2261
2262 static int em28xx_v4l2_resume(struct em28xx *dev)
2263 {
2264         if (dev->is_audio_only)
2265                 return 0;
2266
2267         if (!dev->has_video)
2268                 return 0;
2269
2270         dev_info(&dev->intf->dev, "Resuming video extension\n");
2271         /* what do we do here */
2272         return 0;
2273 }
2274
2275 /*
2276  * em28xx_v4l2_close()
2277  * stops streaming and deallocates all resources allocated by the v4l2
2278  * calls and ioctls
2279  */
2280 static int em28xx_v4l2_close(struct file *filp)
2281 {
2282         struct em28xx         *dev  = video_drvdata(filp);
2283         struct em28xx_v4l2    *v4l2 = dev->v4l2;
2284         struct usb_device *udev = interface_to_usbdev(dev->intf);
2285         int              err;
2286
2287         em28xx_videodbg("users=%d\n", v4l2->users);
2288
2289         vb2_fop_release(filp);
2290         mutex_lock(&dev->lock);
2291
2292         if (v4l2->users == 1) {
2293                 /* No sense to try to write to the device */
2294                 if (dev->disconnected)
2295                         goto exit;
2296
2297                 /* Save some power by putting tuner to sleep */
2298                 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby);
2299
2300                 /* do this before setting alternate! */
2301                 em28xx_set_mode(dev, EM28XX_SUSPEND);
2302
2303                 /* set alternate 0 */
2304                 dev->alt = 0;
2305                 em28xx_videodbg("setting alternate 0\n");
2306                 err = usb_set_interface(udev, 0, 0);
2307                 if (err < 0) {
2308                         dev_err(&dev->intf->dev,
2309                                 "cannot change alternate number to 0 (error=%i)\n",
2310                                 err);
2311                 }
2312         }
2313
2314 exit:
2315         v4l2->users--;
2316         kref_put(&v4l2->ref, em28xx_free_v4l2);
2317         mutex_unlock(&dev->lock);
2318         kref_put(&dev->ref, em28xx_free_device);
2319
2320         return 0;
2321 }
2322
2323 static const struct v4l2_file_operations em28xx_v4l_fops = {
2324         .owner         = THIS_MODULE,
2325         .open          = em28xx_v4l2_open,
2326         .release       = em28xx_v4l2_close,
2327         .read          = vb2_fop_read,
2328         .poll          = vb2_fop_poll,
2329         .mmap          = vb2_fop_mmap,
2330         .unlocked_ioctl = video_ioctl2,
2331 };
2332
2333 static const struct v4l2_ioctl_ops video_ioctl_ops = {
2334         .vidioc_querycap            = vidioc_querycap,
2335         .vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
2336         .vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
2337         .vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
2338         .vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
2339         .vidioc_g_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
2340         .vidioc_try_fmt_vbi_cap     = vidioc_g_fmt_vbi_cap,
2341         .vidioc_s_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
2342         .vidioc_enum_framesizes     = vidioc_enum_framesizes,
2343         .vidioc_enumaudio           = vidioc_enumaudio,
2344         .vidioc_g_audio             = vidioc_g_audio,
2345         .vidioc_s_audio             = vidioc_s_audio,
2346
2347         .vidioc_reqbufs             = vb2_ioctl_reqbufs,
2348         .vidioc_create_bufs         = vb2_ioctl_create_bufs,
2349         .vidioc_prepare_buf         = vb2_ioctl_prepare_buf,
2350         .vidioc_querybuf            = vb2_ioctl_querybuf,
2351         .vidioc_qbuf                = vb2_ioctl_qbuf,
2352         .vidioc_dqbuf               = vb2_ioctl_dqbuf,
2353
2354         .vidioc_g_std               = vidioc_g_std,
2355         .vidioc_querystd            = vidioc_querystd,
2356         .vidioc_s_std               = vidioc_s_std,
2357         .vidioc_g_parm              = vidioc_g_parm,
2358         .vidioc_s_parm              = vidioc_s_parm,
2359         .vidioc_enum_input          = vidioc_enum_input,
2360         .vidioc_g_input             = vidioc_g_input,
2361         .vidioc_s_input             = vidioc_s_input,
2362         .vidioc_streamon            = vb2_ioctl_streamon,
2363         .vidioc_streamoff           = vb2_ioctl_streamoff,
2364         .vidioc_g_tuner             = vidioc_g_tuner,
2365         .vidioc_s_tuner             = vidioc_s_tuner,
2366         .vidioc_g_frequency         = vidioc_g_frequency,
2367         .vidioc_s_frequency         = vidioc_s_frequency,
2368         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2369         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2370 #ifdef CONFIG_VIDEO_ADV_DEBUG
2371         .vidioc_g_chip_info         = vidioc_g_chip_info,
2372         .vidioc_g_register          = vidioc_g_register,
2373         .vidioc_s_register          = vidioc_s_register,
2374 #endif
2375 };
2376
2377 static const struct video_device em28xx_video_template = {
2378         .fops           = &em28xx_v4l_fops,
2379         .ioctl_ops      = &video_ioctl_ops,
2380         .release        = video_device_release_empty,
2381         .tvnorms        = V4L2_STD_ALL,
2382 };
2383
2384 static const struct v4l2_file_operations radio_fops = {
2385         .owner         = THIS_MODULE,
2386         .open          = em28xx_v4l2_open,
2387         .release       = em28xx_v4l2_close,
2388         .unlocked_ioctl = video_ioctl2,
2389 };
2390
2391 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
2392         .vidioc_querycap      = vidioc_querycap,
2393         .vidioc_g_tuner       = radio_g_tuner,
2394         .vidioc_s_tuner       = radio_s_tuner,
2395         .vidioc_g_frequency   = vidioc_g_frequency,
2396         .vidioc_s_frequency   = vidioc_s_frequency,
2397         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2398         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2399 #ifdef CONFIG_VIDEO_ADV_DEBUG
2400         .vidioc_g_chip_info   = vidioc_g_chip_info,
2401         .vidioc_g_register    = vidioc_g_register,
2402         .vidioc_s_register    = vidioc_s_register,
2403 #endif
2404 };
2405
2406 static struct video_device em28xx_radio_template = {
2407         .fops           = &radio_fops,
2408         .ioctl_ops      = &radio_ioctl_ops,
2409         .release        = video_device_release_empty,
2410 };
2411
2412 /* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */
2413 static unsigned short saa711x_addrs[] = {
2414         0x4a >> 1, 0x48 >> 1,   /* SAA7111, SAA7111A and SAA7113 */
2415         0x42 >> 1, 0x40 >> 1,   /* SAA7114, SAA7115 and SAA7118 */
2416         I2C_CLIENT_END };
2417
2418 static unsigned short tvp5150_addrs[] = {
2419         0xb8 >> 1,
2420         0xba >> 1,
2421         I2C_CLIENT_END
2422 };
2423
2424 static unsigned short msp3400_addrs[] = {
2425         0x80 >> 1,
2426         0x88 >> 1,
2427         I2C_CLIENT_END
2428 };
2429
2430 /******************************** usb interface ******************************/
2431
2432 static void em28xx_vdev_init(struct em28xx *dev,
2433                              struct video_device *vfd,
2434                              const struct video_device *template,
2435                              const char *type_name)
2436 {
2437         *vfd            = *template;
2438         vfd->v4l2_dev   = &dev->v4l2->v4l2_dev;
2439         vfd->lock       = &dev->lock;
2440         if (dev->is_webcam)
2441                 vfd->tvnorms = 0;
2442
2443         snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2444                  dev_name(&dev->intf->dev), type_name);
2445
2446         video_set_drvdata(vfd, dev);
2447 }
2448
2449 static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr)
2450 {
2451         struct em28xx_v4l2      *v4l2 = dev->v4l2;
2452         struct v4l2_device      *v4l2_dev = &v4l2->v4l2_dev;
2453         struct tuner_setup      tun_setup;
2454         struct v4l2_frequency   f;
2455
2456         memset(&tun_setup, 0, sizeof(tun_setup));
2457
2458         tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
2459         tun_setup.tuner_callback = em28xx_tuner_callback;
2460
2461         if (dev->board.radio.type) {
2462                 tun_setup.type = dev->board.radio.type;
2463                 tun_setup.addr = dev->board.radio_addr;
2464
2465                 v4l2_device_call_all(v4l2_dev,
2466                                      0, tuner, s_type_addr, &tun_setup);
2467         }
2468
2469         if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type) {
2470                 tun_setup.type   = dev->tuner_type;
2471                 tun_setup.addr   = tuner_addr;
2472
2473                 v4l2_device_call_all(v4l2_dev,
2474                                      0, tuner, s_type_addr, &tun_setup);
2475         }
2476
2477         if (dev->board.tda9887_conf) {
2478                 struct v4l2_priv_tun_config tda9887_cfg;
2479
2480                 tda9887_cfg.tuner = TUNER_TDA9887;
2481                 tda9887_cfg.priv = &dev->board.tda9887_conf;
2482
2483                 v4l2_device_call_all(v4l2_dev,
2484                                      0, tuner, s_config, &tda9887_cfg);
2485         }
2486
2487         if (dev->tuner_type == TUNER_XC2028) {
2488                 struct v4l2_priv_tun_config  xc2028_cfg;
2489                 struct xc2028_ctrl           ctl;
2490
2491                 memset(&xc2028_cfg, 0, sizeof(xc2028_cfg));
2492                 memset(&ctl, 0, sizeof(ctl));
2493
2494                 em28xx_setup_xc3028(dev, &ctl);
2495
2496                 xc2028_cfg.tuner = TUNER_XC2028;
2497                 xc2028_cfg.priv  = &ctl;
2498
2499                 v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg);
2500         }
2501
2502         /* configure tuner */
2503         f.tuner = 0;
2504         f.type = V4L2_TUNER_ANALOG_TV;
2505         f.frequency = 9076;     /* just a magic number */
2506         v4l2->frequency = f.frequency;
2507         v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency, &f);
2508 }
2509
2510 static int em28xx_v4l2_init(struct em28xx *dev)
2511 {
2512         u8 val;
2513         int ret;
2514         unsigned int maxw;
2515         struct v4l2_ctrl_handler *hdl;
2516         struct em28xx_v4l2 *v4l2;
2517
2518         if (dev->is_audio_only) {
2519                 /* Shouldn't initialize IR for this interface */
2520                 return 0;
2521         }
2522
2523         if (!dev->has_video) {
2524                 /* This device does not support the v4l2 extension */
2525                 return 0;
2526         }
2527
2528         dev_info(&dev->intf->dev, "Registering V4L2 extension\n");
2529
2530         mutex_lock(&dev->lock);
2531
2532         v4l2 = kzalloc(sizeof(*v4l2), GFP_KERNEL);
2533         if (!v4l2) {
2534                 mutex_unlock(&dev->lock);
2535                 return -ENOMEM;
2536         }
2537         kref_init(&v4l2->ref);
2538         v4l2->dev = dev;
2539         dev->v4l2 = v4l2;
2540
2541 #ifdef CONFIG_MEDIA_CONTROLLER
2542         v4l2->v4l2_dev.mdev = dev->media_dev;
2543 #endif
2544         ret = v4l2_device_register(&dev->intf->dev, &v4l2->v4l2_dev);
2545         if (ret < 0) {
2546                 dev_err(&dev->intf->dev,
2547                         "Call to v4l2_device_register() failed!\n");
2548                 goto err;
2549         }
2550
2551         hdl = &v4l2->ctrl_handler;
2552         v4l2_ctrl_handler_init(hdl, 8);
2553         v4l2->v4l2_dev.ctrl_handler = hdl;
2554
2555         if (dev->is_webcam)
2556                 v4l2->progressive = true;
2557
2558         /*
2559          * Default format, used for tvp5150 or saa711x output formats
2560          */
2561         v4l2->vinmode = EM28XX_VINMODE_YUV422_CbYCrY;
2562         v4l2->vinctl  = EM28XX_VINCTRL_INTERLACED |
2563                         EM28XX_VINCTRL_CCIR656_ENABLE;
2564
2565         /* request some modules */
2566
2567         if (dev->has_msp34xx)
2568                 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2569                                     &dev->i2c_adap[dev->def_i2c_bus],
2570                                     "msp3400", 0, msp3400_addrs);
2571
2572         if (dev->board.decoder == EM28XX_SAA711X)
2573                 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2574                                     &dev->i2c_adap[dev->def_i2c_bus],
2575                                     "saa7115_auto", 0, saa711x_addrs);
2576
2577         if (dev->board.decoder == EM28XX_TVP5150)
2578                 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2579                                     &dev->i2c_adap[dev->def_i2c_bus],
2580                                     "tvp5150", 0, tvp5150_addrs);
2581
2582         if (dev->board.adecoder == EM28XX_TVAUDIO)
2583                 v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2584                                     &dev->i2c_adap[dev->def_i2c_bus],
2585                                     "tvaudio", dev->board.tvaudio_addr, NULL);
2586
2587         /* Initialize tuner and camera */
2588
2589         if (dev->board.tuner_type != TUNER_ABSENT) {
2590                 unsigned short tuner_addr = dev->board.tuner_addr;
2591                 int has_demod = (dev->board.tda9887_conf & TDA9887_PRESENT);
2592
2593                 if (dev->board.radio.type)
2594                         v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2595                                             &dev->i2c_adap[dev->def_i2c_bus],
2596                                             "tuner", dev->board.radio_addr,
2597                                             NULL);
2598
2599                 if (has_demod)
2600                         v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2601                                             &dev->i2c_adap[dev->def_i2c_bus],
2602                                             "tuner", 0,
2603                                             v4l2_i2c_tuner_addrs(ADDRS_DEMOD));
2604                 if (tuner_addr == 0) {
2605                         enum v4l2_i2c_tuner_type type =
2606                                 has_demod ? ADDRS_TV_WITH_DEMOD : ADDRS_TV;
2607                         struct v4l2_subdev *sd;
2608
2609                         sd = v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2610                                                  &dev->i2c_adap[dev->def_i2c_bus],
2611                                                  "tuner", 0,
2612                                                  v4l2_i2c_tuner_addrs(type));
2613
2614                         if (sd)
2615                                 tuner_addr = v4l2_i2c_subdev_addr(sd);
2616                 } else {
2617                         v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
2618                                             &dev->i2c_adap[dev->def_i2c_bus],
2619                                             "tuner", tuner_addr, NULL);
2620                 }
2621
2622                 em28xx_tuner_setup(dev, tuner_addr);
2623         }
2624
2625         if (dev->em28xx_sensor != EM28XX_NOSENSOR)
2626                 em28xx_init_camera(dev);
2627
2628         /* Configure audio */
2629         ret = em28xx_audio_setup(dev);
2630         if (ret < 0) {
2631                 dev_err(&dev->intf->dev,
2632                         "%s: Error while setting audio - error [%d]!\n",
2633                         __func__, ret);
2634                 goto unregister_dev;
2635         }
2636         if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
2637                 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2638                                   V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
2639                 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2640                                   V4L2_CID_AUDIO_VOLUME, 0, 0x1f, 1, 0x1f);
2641         } else {
2642                 /* install the em28xx notify callback */
2643                 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_MUTE),
2644                                  em28xx_ctrl_notify, dev);
2645                 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_VOLUME),
2646                                  em28xx_ctrl_notify, dev);
2647         }
2648
2649         /* wake i2c devices */
2650         em28xx_wake_i2c(dev);
2651
2652         /* init video dma queues */
2653         INIT_LIST_HEAD(&dev->vidq.active);
2654         INIT_LIST_HEAD(&dev->vbiq.active);
2655
2656         if (dev->has_msp34xx) {
2657                 /* Send a reset to other chips via gpio */
2658                 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xf7);
2659                 if (ret < 0) {
2660                         dev_err(&dev->intf->dev,
2661                                 "%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n",
2662                                 __func__, ret);
2663                         goto unregister_dev;
2664                 }
2665                 usleep_range(10000, 11000);
2666
2667                 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xff);
2668                 if (ret < 0) {
2669                         dev_err(&dev->intf->dev,
2670                                 "%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n",
2671                                 __func__, ret);
2672                         goto unregister_dev;
2673                 }
2674                 usleep_range(10000, 11000);
2675         }
2676
2677         /* set default norm */
2678         v4l2->norm = V4L2_STD_PAL;
2679         v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
2680         v4l2->interlaced_fieldmode = EM28XX_INTERLACED_DEFAULT;
2681
2682         /* Analog specific initialization */
2683         v4l2->format = &format[0];
2684
2685         maxw = norm_maxw(dev);
2686         /*
2687          * MaxPacketSize for em2800 is too small to capture at full resolution
2688          * use half of maxw as the scaler can only scale to 50%
2689          */
2690         if (dev->board.is_em2800)
2691                 maxw /= 2;
2692
2693         em28xx_set_video_format(dev, format[0].fourcc,
2694                                 maxw, norm_maxh(dev));
2695
2696         video_mux(dev, 0);
2697
2698         /* Audio defaults */
2699         dev->mute = 1;
2700         dev->volume = 0x1f;
2701
2702 /*      em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
2703         val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
2704         em28xx_write_reg(dev, EM28XX_R0F_XCLK,
2705                          (EM28XX_XCLK_AUDIO_UNMUTE | val));
2706
2707         em28xx_set_outfmt(dev);
2708
2709         /* Add image controls */
2710
2711         /*
2712          * NOTE: at this point, the subdevices are already registered, so
2713          * bridge controls are only added/enabled when no subdevice provides
2714          * them
2715          */
2716         if (!v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST))
2717                 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2718                                   V4L2_CID_CONTRAST,
2719                                   0, 0x1f, 1, CONTRAST_DEFAULT);
2720         if (!v4l2_ctrl_find(hdl, V4L2_CID_BRIGHTNESS))
2721                 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2722                                   V4L2_CID_BRIGHTNESS,
2723                                   -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT);
2724         if (!v4l2_ctrl_find(hdl, V4L2_CID_SATURATION))
2725                 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2726                                   V4L2_CID_SATURATION,
2727                                   0, 0x1f, 1, SATURATION_DEFAULT);
2728         if (!v4l2_ctrl_find(hdl, V4L2_CID_BLUE_BALANCE))
2729                 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2730                                   V4L2_CID_BLUE_BALANCE,
2731                                   -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT);
2732         if (!v4l2_ctrl_find(hdl, V4L2_CID_RED_BALANCE))
2733                 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2734                                   V4L2_CID_RED_BALANCE,
2735                                   -0x30, 0x30, 1, RED_BALANCE_DEFAULT);
2736         if (!v4l2_ctrl_find(hdl, V4L2_CID_SHARPNESS))
2737                 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
2738                                   V4L2_CID_SHARPNESS,
2739                                   0, 0x0f, 1, SHARPNESS_DEFAULT);
2740
2741         /* Reset image controls */
2742         em28xx_colorlevels_set_default(dev);
2743         v4l2_ctrl_handler_setup(hdl);
2744         ret = hdl->error;
2745         if (ret)
2746                 goto unregister_dev;
2747
2748         /* allocate and fill video video_device struct */
2749         em28xx_vdev_init(dev, &v4l2->vdev, &em28xx_video_template, "video");
2750         mutex_init(&v4l2->vb_queue_lock);
2751         mutex_init(&v4l2->vb_vbi_queue_lock);
2752         v4l2->vdev.queue = &v4l2->vb_vidq;
2753         v4l2->vdev.queue->lock = &v4l2->vb_queue_lock;
2754         v4l2->vdev.device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VIDEO_CAPTURE |
2755                                  V4L2_CAP_STREAMING;
2756         if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE)
2757                 v4l2->vdev.device_caps |= V4L2_CAP_AUDIO;
2758         if (dev->tuner_type != TUNER_ABSENT)
2759                 v4l2->vdev.device_caps |= V4L2_CAP_TUNER;
2760
2761
2762         /* disable inapplicable ioctls */
2763         if (dev->is_webcam) {
2764                 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_QUERYSTD);
2765                 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_STD);
2766                 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_STD);
2767         } else {
2768                 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_PARM);
2769         }
2770         if (dev->tuner_type == TUNER_ABSENT) {
2771                 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_TUNER);
2772                 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_TUNER);
2773                 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_FREQUENCY);
2774                 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_FREQUENCY);
2775         }
2776         if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2777                 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_AUDIO);
2778                 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_AUDIO);
2779         }
2780
2781         /* register v4l2 video video_device */
2782         ret = video_register_device(&v4l2->vdev, VFL_TYPE_VIDEO,
2783                                     video_nr[dev->devno]);
2784         if (ret) {
2785                 dev_err(&dev->intf->dev,
2786                         "unable to register video device (error=%i).\n", ret);
2787                 goto unregister_dev;
2788         }
2789
2790         /* Allocate and fill vbi video_device struct */
2791         if (em28xx_vbi_supported(dev) == 1) {
2792                 em28xx_vdev_init(dev, &v4l2->vbi_dev, &em28xx_video_template,
2793                                  "vbi");
2794
2795                 v4l2->vbi_dev.queue = &v4l2->vb_vbiq;
2796                 v4l2->vbi_dev.queue->lock = &v4l2->vb_vbi_queue_lock;
2797                 v4l2->vbi_dev.device_caps = V4L2_CAP_STREAMING |
2798                         V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE;
2799                 if (dev->tuner_type != TUNER_ABSENT)
2800                         v4l2->vbi_dev.device_caps |= V4L2_CAP_TUNER;
2801
2802                 /* disable inapplicable ioctls */
2803                 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_PARM);
2804                 if (dev->tuner_type == TUNER_ABSENT) {
2805                         v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_TUNER);
2806                         v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_TUNER);
2807                         v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_FREQUENCY);
2808                         v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_FREQUENCY);
2809                 }
2810                 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
2811                         v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_AUDIO);
2812                         v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_AUDIO);
2813                 }
2814
2815                 /* register v4l2 vbi video_device */
2816                 ret = video_register_device(&v4l2->vbi_dev, VFL_TYPE_VBI,
2817                                             vbi_nr[dev->devno]);
2818                 if (ret < 0) {
2819                         dev_err(&dev->intf->dev,
2820                                 "unable to register vbi device\n");
2821                         goto unregister_dev;
2822                 }
2823         }
2824
2825         if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2826                 em28xx_vdev_init(dev, &v4l2->radio_dev, &em28xx_radio_template,
2827                                  "radio");
2828                 v4l2->radio_dev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER;
2829                 ret = video_register_device(&v4l2->radio_dev, VFL_TYPE_RADIO,
2830                                             radio_nr[dev->devno]);
2831                 if (ret < 0) {
2832                         dev_err(&dev->intf->dev,
2833                                 "can't register radio device\n");
2834                         goto unregister_dev;
2835                 }
2836                 dev_info(&dev->intf->dev,
2837                          "Registered radio device as %s\n",
2838                          video_device_node_name(&v4l2->radio_dev));
2839         }
2840
2841         /* Init entities at the Media Controller */
2842         em28xx_v4l2_create_entities(dev);
2843
2844 #ifdef CONFIG_MEDIA_CONTROLLER
2845         ret = v4l2_mc_create_media_graph(dev->media_dev);
2846         if (ret) {
2847                 dev_err(&dev->intf->dev,
2848                         "failed to create media graph\n");
2849                 em28xx_v4l2_media_release(dev);
2850                 goto unregister_dev;
2851         }
2852 #endif
2853
2854         dev_info(&dev->intf->dev,
2855                  "V4L2 video device registered as %s\n",
2856                  video_device_node_name(&v4l2->vdev));
2857
2858         if (video_is_registered(&v4l2->vbi_dev))
2859                 dev_info(&dev->intf->dev,
2860                          "V4L2 VBI device registered as %s\n",
2861                          video_device_node_name(&v4l2->vbi_dev));
2862
2863         /* Save some power by putting tuner to sleep */
2864         v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby);
2865
2866         /* initialize videobuf2 stuff */
2867         em28xx_vb2_setup(dev);
2868
2869         dev_info(&dev->intf->dev,
2870                  "V4L2 extension successfully initialized\n");
2871
2872         kref_get(&dev->ref);
2873
2874         mutex_unlock(&dev->lock);
2875         return 0;
2876
2877 unregister_dev:
2878         if (video_is_registered(&v4l2->radio_dev)) {
2879                 dev_info(&dev->intf->dev,
2880                          "V4L2 device %s deregistered\n",
2881                          video_device_node_name(&v4l2->radio_dev));
2882                 video_unregister_device(&v4l2->radio_dev);
2883         }
2884         if (video_is_registered(&v4l2->vbi_dev)) {
2885                 dev_info(&dev->intf->dev,
2886                          "V4L2 device %s deregistered\n",
2887                          video_device_node_name(&v4l2->vbi_dev));
2888                 video_unregister_device(&v4l2->vbi_dev);
2889         }
2890         if (video_is_registered(&v4l2->vdev)) {
2891                 dev_info(&dev->intf->dev,
2892                          "V4L2 device %s deregistered\n",
2893                          video_device_node_name(&v4l2->vdev));
2894                 video_unregister_device(&v4l2->vdev);
2895         }
2896
2897         v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
2898         v4l2_device_unregister(&v4l2->v4l2_dev);
2899 err:
2900         dev->v4l2 = NULL;
2901         kref_put(&v4l2->ref, em28xx_free_v4l2);
2902         mutex_unlock(&dev->lock);
2903         return ret;
2904 }
2905
2906 static struct em28xx_ops v4l2_ops = {
2907         .id   = EM28XX_V4L2,
2908         .name = "Em28xx v4l2 Extension",
2909         .init = em28xx_v4l2_init,
2910         .fini = em28xx_v4l2_fini,
2911         .suspend = em28xx_v4l2_suspend,
2912         .resume = em28xx_v4l2_resume,
2913 };
2914
2915 static int __init em28xx_video_register(void)
2916 {
2917         return em28xx_register_extension(&v4l2_ops);
2918 }
2919
2920 static void __exit em28xx_video_unregister(void)
2921 {
2922         em28xx_unregister_extension(&v4l2_ops);
2923 }
2924
2925 module_init(em28xx_video_register);
2926 module_exit(em28xx_video_unregister);