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/smp_lock.h>
  50 #include <linux/mutex.h>
  51 #include <linux/delay.h>
  52 #include <linux/videotext.h>
  53 #include <linux/videodev.h>
  54 #include <media/v4l2-common.h>
  55 #include <media/v4l2-ioctl.h>
  56 #include <media/v4l2-i2c-drv-legacy.h>
  57
  58 MODULE_AUTHOR("Michael Geng <linux@MichaelGeng.de>");
  59 MODULE_DESCRIPTION("Philips SAA5249 Teletext decoder driver");
  60 MODULE_LICENSE("GPL");
  61
  62 #define VTX_VER_MAJ 1
  63 #define VTX_VER_MIN 8
  64
  65
  66 #define NUM_DAUS 4
  67 #define NUM_BUFS 8
  68
  69 static const int disp_modes[8][3] =
  70 {
  71         { 0x46, 0x03, 0x03 },   /* DISPOFF */
  72         { 0x46, 0xcc, 0xcc },   /* DISPNORM */
  73         { 0x44, 0x0f, 0x0f },   /* DISPTRANS */
  74         { 0x46, 0xcc, 0x46 },   /* DISPINS */
  75         { 0x44, 0x03, 0x03 },   /* DISPOFF, interlaced */
  76         { 0x44, 0xcc, 0xcc },   /* DISPNORM, interlaced */
  77         { 0x44, 0x0f, 0x0f },   /* DISPTRANS, interlaced */
  78         { 0x44, 0xcc, 0x46 }    /* DISPINS, interlaced */
  79 };
  80
  81
  82
  83 #define PAGE_WAIT    msecs_to_jiffies(300)      /* Time between requesting page and */
  84                                                 /* checking status bits */
  85 #define PGBUF_EXPIRE msecs_to_jiffies(15000)    /* Time to wait before retransmitting */
  86                                                 /* page regardless of infobits */
  87 typedef struct {
  88         u8 pgbuf[VTX_VIRTUALSIZE];              /* Page-buffer */
  89         u8 laststat[10];                        /* Last value of infobits for DAU */
  90         u8 sregs[7];                            /* Page-request registers */
  91         unsigned long expire;                   /* Time when page will be expired */
  92         unsigned clrfound : 1;                  /* VTXIOCCLRFOUND has been called */
  93         unsigned stopped : 1;                   /* VTXIOCSTOPDAU has been called */
  94 } vdau_t;
  95
  96 struct saa5249_device
  97 {
  98         vdau_t vdau[NUM_DAUS];                  /* Data for virtual DAUs (the 5249 only has one */
  99                                                 /* real DAU, so we have to simulate some more) */
 100         int vtx_use_count;
 101         int is_searching[NUM_DAUS];
 102         int disp_mode;
 103         int virtual_mode;
 104         struct i2c_client *client;
 105         unsigned long in_use;
 106         struct mutex lock;
 107 };
 108
 109
 110 #define CCTWR 34                /* I²C write/read-address of vtx-chip */
 111 #define CCTRD 35
 112 #define NOACK_REPEAT 10         /* Retry access this many times on failure */
 113 #define CLEAR_DELAY   msecs_to_jiffies(50)      /* Time required to clear a page */
 114 #define READY_TIMEOUT msecs_to_jiffies(30)      /* Time to wait for ready signal of I2C-bus interface */
 115 #define INIT_DELAY 500          /* Time in usec to wait at initialization of CEA interface */
 116 #define START_DELAY 10          /* Time in usec to wait before starting write-cycle (CEA) */
 117
 118 #define VTX_DEV_MINOR 0
 119
 120 static struct video_device saa_template;        /* Declared near bottom */
 121
 122 /*
 123  *      Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
 124  *      delay may be longer.
 125  */
 126
 127 static void jdelay(unsigned long delay)
 128 {
 129         sigset_t oldblocked = current->blocked;
 130
 131         spin_lock_irq(&current->sighand->siglock);
 132         sigfillset(&current->blocked);
 133         recalc_sigpending();
 134         spin_unlock_irq(&current->sighand->siglock);
 135         msleep_interruptible(jiffies_to_msecs(delay));
 136
 137         spin_lock_irq(&current->sighand->siglock);
 138         current->blocked = oldblocked;
 139         recalc_sigpending();
 140         spin_unlock_irq(&current->sighand->siglock);
 141 }
 142
 143
 144 /*
 145  *      I2C interfaces
 146  */
 147
 148 static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data)
 149 {
 150         char buf[64];
 151
 152         buf[0] = reg;
 153         memcpy(buf+1, data, count);
 154
 155         if (i2c_master_send(t->client, buf, count + 1) == count + 1)
 156                 return 0;
 157         return -1;
 158 }
 159
 160 static int i2c_senddata(struct saa5249_device *t, ...)
 161 {
 162         unsigned char buf[64];
 163         int v;
 164         int ct = 0;
 165         va_list argp;
 166         va_start(argp,t);
 167
 168         while ((v = va_arg(argp, int)) != -1)
 169                 buf[ct++] = v;
 170
 171         va_end(argp);
 172         return i2c_sendbuf(t, buf[0], ct-1, buf+1);
 173 }
 174
 175 /* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop
 176  * handshaking is done by this routine, ack will be sent after the last byte to inhibit further
 177  * sending of data. If uaccess is 'true', data is written to user-space with put_user.
 178  * Returns -1 if I²C-device didn't send acknowledge, 0 otherwise
 179  */
 180
 181 static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf)
 182 {
 183         if(i2c_master_recv(t->client, buf, count)!=count)
 184                 return -1;
 185         return 0;
 186 }
 187
 188
 189 /*
 190  *      Standard character-device-driver functions
 191  */
 192
 193 static long do_saa5249_ioctl(struct file *file, unsigned int cmd, void *arg)
 194 {
 195         static int virtual_mode = false;
 196         struct saa5249_device *t = video_drvdata(file);
 197
 198         switch (cmd) {
 199         case VTXIOCGETINFO:
 200         {
 201                 vtx_info_t *info = arg;
 202                 info->version_major = VTX_VER_MAJ;
 203                 info->version_minor = VTX_VER_MIN;
 204                 info->numpages = NUM_DAUS;
 205                 /*info->cct_type = CCT_TYPE;*/
 206                 return 0;
 207         }
 208
 209         case VTXIOCCLRPAGE:
 210         {
 211                 vtx_pagereq_t *req = arg;
 212
 213                 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 214                         return -EINVAL;
 215                 memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 216                 t->vdau[req->pgbuf].clrfound = true;
 217                 return 0;
 218         }
 219
 220         case VTXIOCCLRFOUND:
 221         {
 222                 vtx_pagereq_t *req = arg;
 223
 224                 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 225                         return -EINVAL;
 226                 t->vdau[req->pgbuf].clrfound = true;
 227                 return 0;
 228         }
 229
 230         case VTXIOCPAGEREQ:
 231         {
 232                 vtx_pagereq_t *req = arg;
 233                 if (!(req->pagemask & PGMASK_PAGE))
 234                         req->page = 0;
 235                 if (!(req->pagemask & PGMASK_HOUR))
 236                         req->hour = 0;
 237                 if (!(req->pagemask & PGMASK_MINUTE))
 238                         req->minute = 0;
 239                 if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
 240                         return -EINVAL;
 241                 req->page &= 0x7ff;
 242                 if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
 243                         req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 244                         return -EINVAL;
 245                 t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
 246                 t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
 247                 t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
 248                 t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
 249                 t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
 250                 t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
 251                 t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
 252                 t->vdau[req->pgbuf].stopped = false;
 253                 t->vdau[req->pgbuf].clrfound = true;
 254                 t->is_searching[req->pgbuf] = true;
 255                 return 0;
 256         }
 257
 258         case VTXIOCGETSTAT:
 259         {
 260                 vtx_pagereq_t *req = arg;
 261                 u8 infobits[10];
 262                 vtx_pageinfo_t info;
 263                 int a;
 264
 265                 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 266                         return -EINVAL;
 267                 if (!t->vdau[req->pgbuf].stopped) {
 268                         if (i2c_senddata(t, 2, 0, -1) ||
 269                                 i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
 270                                 i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
 271                                 i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
 272                                 i2c_senddata(t, 8, 0, 25, 0, -1))
 273                                 return -EIO;
 274                         jdelay(PAGE_WAIT);
 275                         if (i2c_getdata(t, 10, infobits))
 276                                 return -EIO;
 277
 278                         if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) &&   /* check FOUND-bit */
 279                                 (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
 280                                 time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
 281                         {               /* check if new page arrived */
 282                                 if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
 283                                         i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
 284                                         return -EIO;
 285                                 t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
 286                                 memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
 287                                 if (t->virtual_mode) {
 288                                         /* Packet X/24 */
 289                                         if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
 290                                                 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
 291                                                 return -EIO;
 292                                         /* Packet X/27/0 */
 293                                         if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
 294                                                 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
 295                                                 return -EIO;
 296                                         /* Packet 8/30/0...8/30/15
 297                                          * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
 298                                          *        so we should undo this here.
 299                                          */
 300                                         if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
 301                                                 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
 302                                                 return -EIO;
 303                                 }
 304                                 t->vdau[req->pgbuf].clrfound = false;
 305                                 memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
 306                         } else {
 307                                 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
 308                         }
 309                 } else {
 310                         memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
 311                 }
 312
 313                 info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
 314                 if (info.pagenum < 0x100)
 315                         info.pagenum += 0x800;
 316                 info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
 317                 info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
 318                 info.charset = ((infobits[7] >> 1) & 7);
 319                 info.delete = !!(infobits[3] & 8);
 320                 info.headline = !!(infobits[5] & 4);
 321                 info.subtitle = !!(infobits[5] & 8);
 322                 info.supp_header = !!(infobits[6] & 1);
 323                 info.update = !!(infobits[6] & 2);
 324                 info.inter_seq = !!(infobits[6] & 4);
 325                 info.dis_disp = !!(infobits[6] & 8);
 326                 info.serial = !!(infobits[7] & 1);
 327                 info.notfound = !!(infobits[8] & 0x10);
 328                 info.pblf = !!(infobits[9] & 0x20);
 329                 info.hamming = 0;
 330                 for (a = 0; a <= 7; a++) {
 331                         if (infobits[a] & 0xf0) {
 332                                 info.hamming = 1;
 333                                 break;
 334                         }
 335                 }
 336                 if (t->vdau[req->pgbuf].clrfound)
 337                         info.notfound = 1;
 338                 if (copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
 339                         return -EFAULT;
 340                 if (!info.hamming && !info.notfound)
 341                         t->is_searching[req->pgbuf] = false;
 342                 return 0;
 343         }
 344
 345         case VTXIOCGETPAGE:
 346         {
 347                 vtx_pagereq_t *req = arg;
 348                 int start, end;
 349
 350                 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
 351                         req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
 352                         return -EINVAL;
 353                 if (copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
 354                         return -EFAULT;
 355
 356                  /*
 357                   *     Always read the time directly from SAA5249
 358                   */
 359
 360                 if (req->start <= 39 && req->end >= 32) {
 361                         int len;
 362                         char buf[16];
 363                         start = max(req->start, 32);
 364                         end = min(req->end, 39);
 365                         len = end - start + 1;
 366                         if (i2c_senddata(t, 8, 0, 0, start, -1) ||
 367                                 i2c_getdata(t, len, buf))
 368                                 return -EIO;
 369                         if (copy_to_user(req->buffer + start - req->start, buf, len))
 370                                 return -EFAULT;
 371                 }
 372                 /* Insert the current header if DAU is still searching for a page */
 373                 if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf]) {
 374                         char buf[32];
 375                         int len;
 376
 377                         start = max(req->start, 7);
 378                         end = min(req->end, 31);
 379                         len = end - start + 1;
 380                         if (i2c_senddata(t, 8, 0, 0, start, -1) ||
 381                                 i2c_getdata(t, len, buf))
 382                                 return -EIO;
 383                         if (copy_to_user(req->buffer + start - req->start, buf, len))
 384                                 return -EFAULT;
 385                 }
 386                 return 0;
 387         }
 388
 389         case VTXIOCSTOPDAU:
 390         {
 391                 vtx_pagereq_t *req = arg;
 392
 393                 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 394                         return -EINVAL;
 395                 t->vdau[req->pgbuf].stopped = true;
 396                 t->is_searching[req->pgbuf] = false;
 397                 return 0;
 398         }
 399
 400         case VTXIOCPUTPAGE:
 401         case VTXIOCSETDISP:
 402         case VTXIOCPUTSTAT:
 403                 return 0;
 404
 405         case VTXIOCCLRCACHE:
 406         {
 407                 if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
 408                         ' ', ' ', ' ', ' ', ' ', ' ',
 409                         ' ', ' ', ' ', ' ', ' ', ' ',
 410                         ' ', ' ', ' ', ' ', ' ', ' ',
 411                         ' ', ' ', ' ', ' ', ' ', ' ',
 412                         -1))
 413                         return -EIO;
 414                 if (i2c_senddata(t, 3, 0x20, -1))
 415                         return -EIO;
 416                 jdelay(10 * CLEAR_DELAY);                       /* I have no idea how long we have to wait here */
 417                 return 0;
 418         }
 419
 420         case VTXIOCSETVIRT:
 421         {
 422                 /* The SAA5249 has virtual-row reception turned on always */
 423                 t->virtual_mode = (int)(long)arg;
 424                 return 0;
 425         }
 426         }
 427         return -EINVAL;
 428 }
 429
 430 /*
 431  * Translates old vtx IOCTLs to new ones
 432  *
 433  * This keeps new kernel versions compatible with old userspace programs.
 434  */
 435 static inline unsigned int vtx_fix_command(unsigned int cmd)
 436 {
 437         switch (cmd) {
 438         case VTXIOCGETINFO_OLD:
 439                 cmd = VTXIOCGETINFO;
 440                 break;
 441         case VTXIOCCLRPAGE_OLD:
 442                 cmd = VTXIOCCLRPAGE;
 443                 break;
 444         case VTXIOCCLRFOUND_OLD:
 445                 cmd = VTXIOCCLRFOUND;
 446                 break;
 447         case VTXIOCPAGEREQ_OLD:
 448                 cmd = VTXIOCPAGEREQ;
 449                 break;
 450         case VTXIOCGETSTAT_OLD:
 451                 cmd = VTXIOCGETSTAT;
 452                 break;
 453         case VTXIOCGETPAGE_OLD:
 454                 cmd = VTXIOCGETPAGE;
 455                 break;
 456         case VTXIOCSTOPDAU_OLD:
 457                 cmd = VTXIOCSTOPDAU;
 458                 break;
 459         case VTXIOCPUTPAGE_OLD:
 460                 cmd = VTXIOCPUTPAGE;
 461                 break;
 462         case VTXIOCSETDISP_OLD:
 463                 cmd = VTXIOCSETDISP;
 464                 break;
 465         case VTXIOCPUTSTAT_OLD:
 466                 cmd = VTXIOCPUTSTAT;
 467                 break;
 468         case VTXIOCCLRCACHE_OLD:
 469                 cmd = VTXIOCCLRCACHE;
 470                 break;
 471         case VTXIOCSETVIRT_OLD:
 472                 cmd = VTXIOCSETVIRT;
 473                 break;
 474         }
 475         return cmd;
 476 }
 477
 478 /*
 479  *      Handle the locking
 480  */
 481
 482 static long saa5249_ioctl(struct file *file,
 483                          unsigned int cmd, unsigned long arg)
 484 {
 485         struct saa5249_device *t = video_drvdata(file);
 486         long err;
 487
 488         cmd = vtx_fix_command(cmd);
 489         mutex_lock(&t->lock);
 490         err = video_usercopy(file, cmd, arg, do_saa5249_ioctl);
 491         mutex_unlock(&t->lock);
 492         return err;
 493 }
 494
 495 static int saa5249_open(struct file *file)
 496 {
 497         struct saa5249_device *t = video_drvdata(file);
 498         int pgbuf;
 499
 500         if (t->client == NULL)
 501                 return -ENODEV;
 502
 503         if (test_and_set_bit(0, &t->in_use))
 504                 return -EBUSY;
 505
 506         if (i2c_senddata(t, 0, 0, -1) || /* Select R11 */
 507                 /* Turn off parity checks (we do this ourselves) */
 508                 i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
 509                 /* Display TV-picture, no virtual rows */
 510                 i2c_senddata(t, 4, NUM_DAUS, disp_modes[t->disp_mode][1], disp_modes[t->disp_mode][2], 7, -1))
 511                 /* Set display to page 4 */
 512         {
 513                 clear_bit(0, &t->in_use);
 514                 return -EIO;
 515         }
 516
 517         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) {
 518                 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 519                 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
 520                 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
 521                 t->vdau[pgbuf].expire = 0;
 522                 t->vdau[pgbuf].clrfound = true;
 523                 t->vdau[pgbuf].stopped = true;
 524                 t->is_searching[pgbuf] = false;
 525         }
 526         t->virtual_mode = false;
 527         return 0;
 528 }
 529
 530
 531
 532 static int saa5249_release(struct file *file)
 533 {
 534         struct saa5249_device *t = video_drvdata(file);
 535
 536         i2c_senddata(t, 1, 0x20, -1);           /* Turn off CCT */
 537         i2c_senddata(t, 5, 3, 3, -1);           /* Turn off TV-display */
 538         clear_bit(0, &t->in_use);
 539         return 0;
 540 }
 541
 542 static const struct v4l2_file_operations saa_fops = {
 543         .owner          = THIS_MODULE,
 544         .open           = saa5249_open,
 545         .release        = saa5249_release,
 546         .ioctl          = saa5249_ioctl,
 547 };
 548
 549 static struct video_device saa_template =
 550 {
 551         .name           = "saa5249",
 552         .fops           = &saa_fops,
 553         .release        = video_device_release,
 554 };
 555
 556 /* Addresses to scan */
 557 static unsigned short normal_i2c[] = { 0x22 >> 1, I2C_CLIENT_END };
 558
 559 I2C_CLIENT_INSMOD;
 560
 561 static int saa5249_probe(struct i2c_client *client,
 562                         const struct i2c_device_id *id)
 563 {
 564         int pgbuf;
 565         int err;
 566         struct video_device *vd;
 567         struct saa5249_device *t;
 568
 569         v4l_info(client, "chip found @ 0x%x (%s)\n",
 570                         client->addr << 1, client->adapter->name);
 571         v4l_info(client, "VideoText version %d.%d\n",
 572                         VTX_VER_MAJ, VTX_VER_MIN);
 573         t = kzalloc(sizeof(*t), GFP_KERNEL);
 574         if (t == NULL)
 575                 return -ENOMEM;
 576         mutex_init(&t->lock);
 577
 578         /* Now create a video4linux device */
 579         vd = kmalloc(sizeof(struct video_device), GFP_KERNEL);
 580         if (vd == NULL) {
 581                 kfree(client);
 582                 return -ENOMEM;
 583         }
 584         i2c_set_clientdata(client, vd);
 585         memcpy(vd, &saa_template, sizeof(*vd));
 586
 587         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) {
 588                 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 589                 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
 590                 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
 591                 t->vdau[pgbuf].expire = 0;
 592                 t->vdau[pgbuf].clrfound = true;
 593                 t->vdau[pgbuf].stopped = true;
 594                 t->is_searching[pgbuf] = false;
 595         }
 596         video_set_drvdata(vd, t);
 597
 598         /* Register it */
 599         err = video_register_device(vd, VFL_TYPE_VTX, -1);
 600         if (err < 0) {
 601                 kfree(t);
 602                 kfree(vd);
 603                 return err;
 604         }
 605         t->client = client;
 606         return 0;
 607 }
 608
 609 static int saa5249_remove(struct i2c_client *client)
 610 {
 611         struct video_device *vd = i2c_get_clientdata(client);
 612
 613         video_unregister_device(vd);
 614         kfree(video_get_drvdata(vd));
 615         kfree(vd);
 616         return 0;
 617 }
 618
 619 static const struct i2c_device_id saa5249_id[] = {
 620         { "saa5249", 0 },
 621         { }
 622 };
 623 MODULE_DEVICE_TABLE(i2c, saa5249_id);
 624
 625 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 626         .name = "saa5249",
 627         .driverid = I2C_DRIVERID_SAA5249,
 628         .probe = saa5249_probe,
 629         .remove = saa5249_remove,
 630         .id_table = saa5249_id,
 631 };