drivers/media/video/saa5249.c

   1 /*
   2  * Modified in order to keep it compatible both with new and old videotext IOCTLs by
   3  * Michael Geng <linux@MichaelGeng.de>
   4  *
   5  *      Cleaned up to use existing videodev interface and allow the idea
   6  *      of multiple teletext decoders on the video4linux iface. Changed i2c
   7  *      to cover addressing clashes on device busses. It's also rebuilt so
   8  *      you can add arbitary multiple teletext devices to Linux video4linux
   9  *      now (well 32 anyway).
  10  *
  11  *      Alan Cox <alan@lxorguk.ukuu.org.uk>
  12  *
  13  *      The original driver was heavily modified to match the i2c interface
  14  *      It was truncated to use the WinTV boards, too.
  15  *
  16  *      Copyright (c) 1998 Richard Guenther <richard.guenther@student.uni-tuebingen.de>
  17  *
  18  *      Derived From
  19  *
  20  * vtx.c:
  21  * This is a loadable character-device-driver for videotext-interfaces
  22  * (aka teletext). Please check the Makefile/README for a list of supported
  23  * interfaces.
  24  *
  25  * Copyright (c) 1994-97 Martin Buck  <martin-2.buck@student.uni-ulm.de>
  26  *
  27  *
  28  * This program is free software; you can redistribute it and/or modify
  29  * it under the terms of the GNU General Public License as published by
  30  * the Free Software Foundation; either version 2 of the License, or
  31  * (at your option) any later version.
  32  *
  33  * This program is distributed in the hope that it will be useful,
  34  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  35  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  36  * GNU General Public License for more details.
  37  *
  38  * You should have received a copy of the GNU General Public License
  39  * along with this program; if not, write to the Free Software
  40  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  41  * USA.
  42  */
  43
  44 #include <linux/module.h>
  45 #include <linux/kernel.h>
  46 #include <linux/mm.h>
  47 #include <linux/init.h>
  48 #include <linux/i2c.h>
  49 #include <linux/mutex.h>
  50 #include <linux/delay.h>
  51 #include <linux/videotext.h>
  52 #include <linux/videodev2.h>
  53 #include <media/v4l2-device.h>
  54 #include <media/v4l2-chip-ident.h>
  55 #include <media/v4l2-ioctl.h>
  56 #include <media/v4l2-i2c-drv.h>
  57
  58 MODULE_AUTHOR("Michael Geng <linux@MichaelGeng.de>");
  59 MODULE_DESCRIPTION("Philips SAA5249 Teletext decoder driver");
  60 MODULE_LICENSE("GPL");
  61
  62
  63 #define VTX_VER_MAJ 1
  64 #define VTX_VER_MIN 8
  65
  66
  67 #define NUM_DAUS 4
  68 #define NUM_BUFS 8
  69
  70 static const int disp_modes[8][3] =
  71 {
  72         { 0x46, 0x03, 0x03 },   /* DISPOFF */
  73         { 0x46, 0xcc, 0xcc },   /* DISPNORM */
  74         { 0x44, 0x0f, 0x0f },   /* DISPTRANS */
  75         { 0x46, 0xcc, 0x46 },   /* DISPINS */
  76         { 0x44, 0x03, 0x03 },   /* DISPOFF, interlaced */
  77         { 0x44, 0xcc, 0xcc },   /* DISPNORM, interlaced */
  78         { 0x44, 0x0f, 0x0f },   /* DISPTRANS, interlaced */
  79         { 0x44, 0xcc, 0x46 }    /* DISPINS, interlaced */
  80 };
  81
  82
  83
  84 #define PAGE_WAIT    msecs_to_jiffies(300)      /* Time between requesting page and */
  85                                                 /* checking status bits */
  86 #define PGBUF_EXPIRE msecs_to_jiffies(15000)    /* Time to wait before retransmitting */
  87                                                 /* page regardless of infobits */
  88 typedef struct {
  89         u8 pgbuf[VTX_VIRTUALSIZE];              /* Page-buffer */
  90         u8 laststat[10];                        /* Last value of infobits for DAU */
  91         u8 sregs[7];                            /* Page-request registers */
  92         unsigned long expire;                   /* Time when page will be expired */
  93         unsigned clrfound : 1;                  /* VTXIOCCLRFOUND has been called */
  94         unsigned stopped : 1;                   /* VTXIOCSTOPDAU has been called */
  95 } vdau_t;
  96
  97 struct saa5249_device
  98 {
  99         struct v4l2_subdev sd;
 100         struct video_device *vdev;
 101         vdau_t vdau[NUM_DAUS];                  /* Data for virtual DAUs (the 5249 only has one */
 102                                                 /* real DAU, so we have to simulate some more) */
 103         int vtx_use_count;
 104         int is_searching[NUM_DAUS];
 105         int disp_mode;
 106         int virtual_mode;
 107         unsigned long in_use;
 108         struct mutex lock;
 109 };
 110
 111 static inline struct saa5249_device *to_dev(struct v4l2_subdev *sd)
 112 {
 113         return container_of(sd, struct saa5249_device, sd);
 114 }
 115
 116
 117 #define CCTWR 34                /* I²C write/read-address of vtx-chip */
 118 #define CCTRD 35
 119 #define NOACK_REPEAT 10         /* Retry access this many times on failure */
 120 #define CLEAR_DELAY   msecs_to_jiffies(50)      /* Time required to clear a page */
 121 #define READY_TIMEOUT msecs_to_jiffies(30)      /* Time to wait for ready signal of I2C-bus interface */
 122 #define INIT_DELAY 500          /* Time in usec to wait at initialization of CEA interface */
 123 #define START_DELAY 10          /* Time in usec to wait before starting write-cycle (CEA) */
 124
 125 #define VTX_DEV_MINOR 0
 126
 127 static struct video_device saa_template;        /* Declared near bottom */
 128
 129 /*
 130  *      Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
 131  *      delay may be longer.
 132  */
 133
 134 static void jdelay(unsigned long delay)
 135 {
 136         sigset_t oldblocked = current->blocked;
 137
 138         spin_lock_irq(&current->sighand->siglock);
 139         sigfillset(&current->blocked);
 140         recalc_sigpending();
 141         spin_unlock_irq(&current->sighand->siglock);
 142         msleep_interruptible(jiffies_to_msecs(delay));
 143
 144         spin_lock_irq(&current->sighand->siglock);
 145         current->blocked = oldblocked;
 146         recalc_sigpending();
 147         spin_unlock_irq(&current->sighand->siglock);
 148 }
 149
 150
 151 /*
 152  *      I2C interfaces
 153  */
 154
 155 static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data)
 156 {
 157         struct i2c_client *client = v4l2_get_subdevdata(&t->sd);
 158         char buf[64];
 159
 160         buf[0] = reg;
 161         memcpy(buf+1, data, count);
 162
 163         if (i2c_master_send(client, buf, count + 1) == count + 1)
 164                 return 0;
 165         return -1;
 166 }
 167
 168 static int i2c_senddata(struct saa5249_device *t, ...)
 169 {
 170         unsigned char buf[64];
 171         int v;
 172         int ct = 0;
 173         va_list argp;
 174         va_start(argp,t);
 175
 176         while ((v = va_arg(argp, int)) != -1)
 177                 buf[ct++] = v;
 178
 179         va_end(argp);
 180         return i2c_sendbuf(t, buf[0], ct-1, buf+1);
 181 }
 182
 183 /* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop
 184  * handshaking is done by this routine, ack will be sent after the last byte to inhibit further
 185  * sending of data. If uaccess is 'true', data is written to user-space with put_user.
 186  * Returns -1 if I²C-device didn't send acknowledge, 0 otherwise
 187  */
 188
 189 static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf)
 190 {
 191         struct i2c_client *client = v4l2_get_subdevdata(&t->sd);
 192
 193         if (i2c_master_recv(client, buf, count) != count)
 194                 return -1;
 195         return 0;
 196 }
 197
 198
 199 /*
 200  *      Standard character-device-driver functions
 201  */
 202
 203 static long do_saa5249_ioctl(struct file *file, unsigned int cmd, void *arg)
 204 {
 205         static int virtual_mode = false;
 206         struct saa5249_device *t = video_drvdata(file);
 207
 208         switch (cmd) {
 209         case VTXIOCGETINFO:
 210         {
 211                 vtx_info_t *info = arg;
 212                 info->version_major = VTX_VER_MAJ;
 213                 info->version_minor = VTX_VER_MIN;
 214                 info->numpages = NUM_DAUS;
 215                 /*info->cct_type = CCT_TYPE;*/
 216                 return 0;
 217         }
 218
 219         case VTXIOCCLRPAGE:
 220         {
 221                 vtx_pagereq_t *req = arg;
 222
 223                 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 224                         return -EINVAL;
 225                 memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 226                 t->vdau[req->pgbuf].clrfound = true;
 227                 return 0;
 228         }
 229
 230         case VTXIOCCLRFOUND:
 231         {
 232                 vtx_pagereq_t *req = arg;
 233
 234                 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 235                         return -EINVAL;
 236                 t->vdau[req->pgbuf].clrfound = true;
 237                 return 0;
 238         }
 239
 240         case VTXIOCPAGEREQ:
 241         {
 242                 vtx_pagereq_t *req = arg;
 243                 if (!(req->pagemask & PGMASK_PAGE))
 244                         req->page = 0;
 245                 if (!(req->pagemask & PGMASK_HOUR))
 246                         req->hour = 0;
 247                 if (!(req->pagemask & PGMASK_MINUTE))
 248                         req->minute = 0;
 249                 if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
 250                         return -EINVAL;
 251                 req->page &= 0x7ff;
 252                 if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
 253                         req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 254                         return -EINVAL;
 255                 t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
 256                 t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
 257                 t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
 258                 t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
 259                 t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
 260                 t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
 261                 t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
 262                 t->vdau[req->pgbuf].stopped = false;
 263                 t->vdau[req->pgbuf].clrfound = true;
 264                 t->is_searching[req->pgbuf] = true;
 265                 return 0;
 266         }
 267
 268         case VTXIOCGETSTAT:
 269         {
 270                 vtx_pagereq_t *req = arg;
 271                 u8 infobits[10];
 272                 vtx_pageinfo_t info;
 273                 int a;
 274
 275                 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 276                         return -EINVAL;
 277                 if (!t->vdau[req->pgbuf].stopped) {
 278                         if (i2c_senddata(t, 2, 0, -1) ||
 279                                 i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
 280                                 i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
 281                                 i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
 282                                 i2c_senddata(t, 8, 0, 25, 0, -1))
 283                                 return -EIO;
 284                         jdelay(PAGE_WAIT);
 285                         if (i2c_getdata(t, 10, infobits))
 286                                 return -EIO;
 287
 288                         if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) &&   /* check FOUND-bit */
 289                                 (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
 290                                 time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
 291                         {               /* check if new page arrived */
 292                                 if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
 293                                         i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
 294                                         return -EIO;
 295                                 t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
 296                                 memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
 297                                 if (t->virtual_mode) {
 298                                         /* Packet X/24 */
 299                                         if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
 300                                                 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
 301                                                 return -EIO;
 302                                         /* Packet X/27/0 */
 303                                         if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
 304                                                 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
 305                                                 return -EIO;
 306                                         /* Packet 8/30/0...8/30/15
 307                                          * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
 308                                          *        so we should undo this here.
 309                                          */
 310                                         if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
 311                                                 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
 312                                                 return -EIO;
 313                                 }
 314                                 t->vdau[req->pgbuf].clrfound = false;
 315                                 memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
 316                         } else {
 317                                 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
 318                         }
 319                 } else {
 320                         memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
 321                 }
 322
 323                 info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
 324                 if (info.pagenum < 0x100)
 325                         info.pagenum += 0x800;
 326                 info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
 327                 info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
 328                 info.charset = ((infobits[7] >> 1) & 7);
 329                 info.delete = !!(infobits[3] & 8);
 330                 info.headline = !!(infobits[5] & 4);
 331                 info.subtitle = !!(infobits[5] & 8);
 332                 info.supp_header = !!(infobits[6] & 1);
 333                 info.update = !!(infobits[6] & 2);
 334                 info.inter_seq = !!(infobits[6] & 4);
 335                 info.dis_disp = !!(infobits[6] & 8);
 336                 info.serial = !!(infobits[7] & 1);
 337                 info.notfound = !!(infobits[8] & 0x10);
 338                 info.pblf = !!(infobits[9] & 0x20);
 339                 info.hamming = 0;
 340                 for (a = 0; a <= 7; a++) {
 341                         if (infobits[a] & 0xf0) {
 342                                 info.hamming = 1;
 343                                 break;
 344                         }
 345                 }
 346                 if (t->vdau[req->pgbuf].clrfound)
 347                         info.notfound = 1;
 348                 if (copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
 349                         return -EFAULT;
 350                 if (!info.hamming && !info.notfound)
 351                         t->is_searching[req->pgbuf] = false;
 352                 return 0;
 353         }
 354
 355         case VTXIOCGETPAGE:
 356         {
 357                 vtx_pagereq_t *req = arg;
 358                 int start, end;
 359
 360                 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
 361                         req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
 362                         return -EINVAL;
 363                 if (copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
 364                         return -EFAULT;
 365
 366                  /*
 367                   *     Always read the time directly from SAA5249
 368                   */
 369
 370                 if (req->start <= 39 && req->end >= 32) {
 371                         int len;
 372                         char buf[16];
 373                         start = max(req->start, 32);
 374                         end = min(req->end, 39);
 375                         len = end - start + 1;
 376                         if (i2c_senddata(t, 8, 0, 0, start, -1) ||
 377                                 i2c_getdata(t, len, buf))
 378                                 return -EIO;
 379                         if (copy_to_user(req->buffer + start - req->start, buf, len))
 380                                 return -EFAULT;
 381                 }
 382                 /* Insert the current header if DAU is still searching for a page */
 383                 if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf]) {
 384                         char buf[32];
 385                         int len;
 386
 387                         start = max(req->start, 7);
 388                         end = min(req->end, 31);
 389                         len = end - start + 1;
 390                         if (i2c_senddata(t, 8, 0, 0, start, -1) ||
 391                                 i2c_getdata(t, len, buf))
 392                                 return -EIO;
 393                         if (copy_to_user(req->buffer + start - req->start, buf, len))
 394                                 return -EFAULT;
 395                 }
 396                 return 0;
 397         }
 398
 399         case VTXIOCSTOPDAU:
 400         {
 401                 vtx_pagereq_t *req = arg;
 402
 403                 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 404                         return -EINVAL;
 405                 t->vdau[req->pgbuf].stopped = true;
 406                 t->is_searching[req->pgbuf] = false;
 407                 return 0;
 408         }
 409
 410         case VTXIOCPUTPAGE:
 411         case VTXIOCSETDISP:
 412         case VTXIOCPUTSTAT:
 413                 return 0;
 414
 415         case VTXIOCCLRCACHE:
 416         {
 417                 if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
 418                         ' ', ' ', ' ', ' ', ' ', ' ',
 419                         ' ', ' ', ' ', ' ', ' ', ' ',
 420                         ' ', ' ', ' ', ' ', ' ', ' ',
 421                         ' ', ' ', ' ', ' ', ' ', ' ',
 422                         -1))
 423                         return -EIO;
 424                 if (i2c_senddata(t, 3, 0x20, -1))
 425                         return -EIO;
 426                 jdelay(10 * CLEAR_DELAY);                       /* I have no idea how long we have to wait here */
 427                 return 0;
 428         }
 429
 430         case VTXIOCSETVIRT:
 431         {
 432                 /* The SAA5249 has virtual-row reception turned on always */
 433                 t->virtual_mode = (int)(long)arg;
 434                 return 0;
 435         }
 436         }
 437         return -EINVAL;
 438 }
 439
 440 /*
 441  * Translates old vtx IOCTLs to new ones
 442  *
 443  * This keeps new kernel versions compatible with old userspace programs.
 444  */
 445 static inline unsigned int vtx_fix_command(unsigned int cmd)
 446 {
 447         switch (cmd) {
 448         case VTXIOCGETINFO_OLD:
 449                 cmd = VTXIOCGETINFO;
 450                 break;
 451         case VTXIOCCLRPAGE_OLD:
 452                 cmd = VTXIOCCLRPAGE;
 453                 break;
 454         case VTXIOCCLRFOUND_OLD:
 455                 cmd = VTXIOCCLRFOUND;
 456                 break;
 457         case VTXIOCPAGEREQ_OLD:
 458                 cmd = VTXIOCPAGEREQ;
 459                 break;
 460         case VTXIOCGETSTAT_OLD:
 461                 cmd = VTXIOCGETSTAT;
 462                 break;
 463         case VTXIOCGETPAGE_OLD:
 464                 cmd = VTXIOCGETPAGE;
 465                 break;
 466         case VTXIOCSTOPDAU_OLD:
 467                 cmd = VTXIOCSTOPDAU;
 468                 break;
 469         case VTXIOCPUTPAGE_OLD:
 470                 cmd = VTXIOCPUTPAGE;
 471                 break;
 472         case VTXIOCSETDISP_OLD:
 473                 cmd = VTXIOCSETDISP;
 474                 break;
 475         case VTXIOCPUTSTAT_OLD:
 476                 cmd = VTXIOCPUTSTAT;
 477                 break;
 478         case VTXIOCCLRCACHE_OLD:
 479                 cmd = VTXIOCCLRCACHE;
 480                 break;
 481         case VTXIOCSETVIRT_OLD:
 482                 cmd = VTXIOCSETVIRT;
 483                 break;
 484         }
 485         return cmd;
 486 }
 487
 488 /*
 489  *      Handle the locking
 490  */
 491
 492 static long saa5249_ioctl(struct file *file,
 493                          unsigned int cmd, unsigned long arg)
 494 {
 495         struct saa5249_device *t = video_drvdata(file);
 496         long err;
 497
 498         cmd = vtx_fix_command(cmd);
 499         mutex_lock(&t->lock);
 500         err = video_usercopy(file, cmd, arg, do_saa5249_ioctl);
 501         mutex_unlock(&t->lock);
 502         return err;
 503 }
 504
 505 static int saa5249_open(struct file *file)
 506 {
 507         struct saa5249_device *t = video_drvdata(file);
 508         int pgbuf;
 509
 510         if (test_and_set_bit(0, &t->in_use))
 511                 return -EBUSY;
 512
 513         if (i2c_senddata(t, 0, 0, -1) || /* Select R11 */
 514                 /* Turn off parity checks (we do this ourselves) */
 515                 i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
 516                 /* Display TV-picture, no virtual rows */
 517                 i2c_senddata(t, 4, NUM_DAUS, disp_modes[t->disp_mode][1], disp_modes[t->disp_mode][2], 7, -1))
 518                 /* Set display to page 4 */
 519         {
 520                 clear_bit(0, &t->in_use);
 521                 return -EIO;
 522         }
 523
 524         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) {
 525                 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 526                 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
 527                 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
 528                 t->vdau[pgbuf].expire = 0;
 529                 t->vdau[pgbuf].clrfound = true;
 530                 t->vdau[pgbuf].stopped = true;
 531                 t->is_searching[pgbuf] = false;
 532         }
 533         t->virtual_mode = false;
 534         return 0;
 535 }
 536
 537
 538
 539 static int saa5249_release(struct file *file)
 540 {
 541         struct saa5249_device *t = video_drvdata(file);
 542
 543         i2c_senddata(t, 1, 0x20, -1);           /* Turn off CCT */
 544         i2c_senddata(t, 5, 3, 3, -1);           /* Turn off TV-display */
 545         clear_bit(0, &t->in_use);
 546         return 0;
 547 }
 548
 549 static const struct v4l2_file_operations saa_fops = {
 550         .owner          = THIS_MODULE,
 551         .open           = saa5249_open,
 552         .release        = saa5249_release,
 553         .ioctl          = saa5249_ioctl,
 554 };
 555
 556 static struct video_device saa_template =
 557 {
 558         .name           = "saa5249",
 559         .fops           = &saa_fops,
 560         .release        = video_device_release,
 561 };
 562
 563 static int saa5249_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 564 {
 565         struct i2c_client *client = v4l2_get_subdevdata(sd);
 566
 567         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA5249, 0);
 568 }
 569
 570 static const struct v4l2_subdev_core_ops saa5249_core_ops = {
 571         .g_chip_ident = saa5249_g_chip_ident,
 572 };
 573
 574 static const struct v4l2_subdev_ops saa5249_ops = {
 575         .core = &saa5249_core_ops,
 576 };
 577
 578 static int saa5249_probe(struct i2c_client *client,
 579                         const struct i2c_device_id *id)
 580 {
 581         int pgbuf;
 582         int err;
 583         struct saa5249_device *t;
 584         struct v4l2_subdev *sd;
 585
 586         v4l_info(client, "chip found @ 0x%x (%s)\n",
 587                         client->addr << 1, client->adapter->name);
 588         v4l_info(client, "VideoText version %d.%d\n",
 589                         VTX_VER_MAJ, VTX_VER_MIN);
 590         t = kzalloc(sizeof(*t), GFP_KERNEL);
 591         if (t == NULL)
 592                 return -ENOMEM;
 593         sd = &t->sd;
 594         v4l2_i2c_subdev_init(sd, client, &saa5249_ops);
 595         mutex_init(&t->lock);
 596
 597         /* Now create a video4linux device */
 598         t->vdev = video_device_alloc();
 599         if (t->vdev == NULL) {
 600                 kfree(t);
 601                 kfree(client);
 602                 return -ENOMEM;
 603         }
 604         memcpy(t->vdev, &saa_template, sizeof(*t->vdev));
 605
 606         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) {
 607                 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 608                 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
 609                 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
 610                 t->vdau[pgbuf].expire = 0;
 611                 t->vdau[pgbuf].clrfound = true;
 612                 t->vdau[pgbuf].stopped = true;
 613                 t->is_searching[pgbuf] = false;
 614         }
 615         video_set_drvdata(t->vdev, t);
 616
 617         /* Register it */
 618         err = video_register_device(t->vdev, VFL_TYPE_VTX, -1);
 619         if (err < 0) {
 620                 video_device_release(t->vdev);
 621                 kfree(t);
 622                 return err;
 623         }
 624         return 0;
 625 }
 626
 627 static int saa5249_remove(struct i2c_client *client)
 628 {
 629         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 630         struct saa5249_device *t = to_dev(sd);
 631
 632         video_unregister_device(t->vdev);
 633         v4l2_device_unregister_subdev(sd);
 634         kfree(t);
 635         return 0;
 636 }
 637
 638 static const struct i2c_device_id saa5249_id[] = {
 639         { "saa5249", 0 },
 640         { }
 641 };
 642 MODULE_DEVICE_TABLE(i2c, saa5249_id);
 643
 644 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 645         .name = "saa5249",
 646         .probe = saa5249_probe,
 647         .remove = saa5249_remove,
 648         .id_table = saa5249_id,
 649 };