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.Cox@linux.org>
  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  * $Id: saa5249.c,v 1.1 1998/03/30 22:23:23 alan Exp $
  19  *
  20  *      Derived From
  21  *
  22  * vtx.c:
  23  * This is a loadable character-device-driver for videotext-interfaces
  24  * (aka teletext). Please check the Makefile/README for a list of supported
  25  * interfaces.
  26  *
  27  * Copyright (c) 1994-97 Martin Buck  <martin-2.buck@student.uni-ulm.de>
  28  *
  29  *
  30  * This program is free software; you can redistribute it and/or modify
  31  * it under the terms of the GNU General Public License as published by
  32  * the Free Software Foundation; either version 2 of the License, or
  33  * (at your option) any later version.
  34  *
  35  * This program is distributed in the hope that it will be useful,
  36  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  37  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  38  * GNU General Public License for more details.
  39  *
  40  * You should have received a copy of the GNU General Public License
  41  * along with this program; if not, write to the Free Software
  42  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  43  * USA.
  44  */
  45
  46 #include <linux/module.h>
  47 #include <linux/kernel.h>
  48 #include <linux/sched.h>
  49 #include <linux/mm.h>
  50 #include <linux/errno.h>
  51 #include <linux/delay.h>
  52 #include <linux/ioport.h>
  53 #include <linux/slab.h>
  54 #include <linux/init.h>
  55 #include <stdarg.h>
  56 #include <linux/i2c.h>
  57 #include <linux/videotext.h>
  58 #include <linux/videodev.h>
  59 #include <media/v4l2-common.h>
  60 #include <linux/mutex.h>
  61
  62
  63 #include <asm/io.h>
  64 #include <asm/uaccess.h>
  65
  66 #define VTX_VER_MAJ 1
  67 #define VTX_VER_MIN 8
  68
  69
  70
  71 #define NUM_DAUS 4
  72 #define NUM_BUFS 8
  73 #define IF_NAME "SAA5249"
  74
  75 static const int disp_modes[8][3] =
  76 {
  77         { 0x46, 0x03, 0x03 },   /* DISPOFF */
  78         { 0x46, 0xcc, 0xcc },   /* DISPNORM */
  79         { 0x44, 0x0f, 0x0f },   /* DISPTRANS */
  80         { 0x46, 0xcc, 0x46 },   /* DISPINS */
  81         { 0x44, 0x03, 0x03 },   /* DISPOFF, interlaced */
  82         { 0x44, 0xcc, 0xcc },   /* DISPNORM, interlaced */
  83         { 0x44, 0x0f, 0x0f },   /* DISPTRANS, interlaced */
  84         { 0x44, 0xcc, 0x46 }    /* DISPINS, interlaced */
  85 };
  86
  87
  88
  89 #define PAGE_WAIT    msecs_to_jiffies(300)      /* Time between requesting page and */
  90                                                 /* checking status bits */
  91 #define PGBUF_EXPIRE msecs_to_jiffies(15000)    /* Time to wait before retransmitting */
  92                                                 /* page regardless of infobits */
  93 typedef struct {
  94         u8 pgbuf[VTX_VIRTUALSIZE];              /* Page-buffer */
  95         u8 laststat[10];                        /* Last value of infobits for DAU */
  96         u8 sregs[7];                            /* Page-request registers */
  97         unsigned long expire;                   /* Time when page will be expired */
  98         unsigned clrfound : 1;                  /* VTXIOCCLRFOUND has been called */
  99         unsigned stopped : 1;                   /* VTXIOCSTOPDAU has been called */
 100 } vdau_t;
 101
 102 struct saa5249_device
 103 {
 104         vdau_t vdau[NUM_DAUS];                  /* Data for virtual DAUs (the 5249 only has one */
 105                                                 /* real DAU, so we have to simulate some more) */
 106         int vtx_use_count;
 107         int is_searching[NUM_DAUS];
 108         int disp_mode;
 109         int virtual_mode;
 110         struct i2c_client *client;
 111         struct mutex lock;
 112 };
 113
 114
 115 #define CCTWR 34                /* I²C write/read-address of vtx-chip */
 116 #define CCTRD 35
 117 #define NOACK_REPEAT 10         /* Retry access this many times on failure */
 118 #define CLEAR_DELAY   msecs_to_jiffies(50)      /* Time required to clear a page */
 119 #define READY_TIMEOUT msecs_to_jiffies(30)      /* Time to wait for ready signal of I2C-bus interface */
 120 #define INIT_DELAY 500          /* Time in usec to wait at initialization of CEA interface */
 121 #define START_DELAY 10          /* Time in usec to wait before starting write-cycle (CEA) */
 122
 123 #define VTX_DEV_MINOR 0
 124
 125 /* General defines and debugging support */
 126
 127 #define RESCHED do { cond_resched(); } while(0)
 128
 129 static struct video_device saa_template;        /* Declared near bottom */
 130
 131 /* Addresses to scan */
 132 static unsigned short normal_i2c[] = {34>>1,I2C_CLIENT_END};
 133 I2C_CLIENT_INSMOD;
 134
 135 static struct i2c_client client_template;
 136
 137 static int saa5249_attach(struct i2c_adapter *adap, int addr, int kind)
 138 {
 139         int pgbuf;
 140         int err;
 141         struct i2c_client *client;
 142         struct video_device *vd;
 143         struct saa5249_device *t;
 144
 145         printk(KERN_INFO "saa5249: teletext chip found.\n");
 146         client=kmalloc(sizeof(*client), GFP_KERNEL);
 147         if(client==NULL)
 148                 return -ENOMEM;
 149         client_template.adapter = adap;
 150         client_template.addr = addr;
 151         memcpy(client, &client_template, sizeof(*client));
 152         t = kzalloc(sizeof(*t), GFP_KERNEL);
 153         if(t==NULL)
 154         {
 155                 kfree(client);
 156                 return -ENOMEM;
 157         }
 158         strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
 159         mutex_init(&t->lock);
 160
 161         /*
 162          *      Now create a video4linux device
 163          */
 164
 165         vd = kmalloc(sizeof(struct video_device), GFP_KERNEL);
 166         if(vd==NULL)
 167         {
 168                 kfree(t);
 169                 kfree(client);
 170                 return -ENOMEM;
 171         }
 172         i2c_set_clientdata(client, vd);
 173         memcpy(vd, &saa_template, sizeof(*vd));
 174
 175         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
 176         {
 177                 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 178                 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
 179                 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
 180                 t->vdau[pgbuf].expire = 0;
 181                 t->vdau[pgbuf].clrfound = true;
 182                 t->vdau[pgbuf].stopped = true;
 183                 t->is_searching[pgbuf] = false;
 184         }
 185         vd->priv=t;
 186
 187
 188         /*
 189          *      Register it
 190          */
 191
 192         if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
 193         {
 194                 kfree(t);
 195                 kfree(vd);
 196                 kfree(client);
 197                 return err;
 198         }
 199         t->client = client;
 200         i2c_attach_client(client);
 201         return 0;
 202 }
 203
 204 /*
 205  *      We do most of the hard work when we become a device on the i2c.
 206  */
 207
 208 static int saa5249_probe(struct i2c_adapter *adap)
 209 {
 210         if (adap->class & I2C_CLASS_TV_ANALOG)
 211                 return i2c_probe(adap, &addr_data, saa5249_attach);
 212         return 0;
 213 }
 214
 215 static int saa5249_detach(struct i2c_client *client)
 216 {
 217         struct video_device *vd = i2c_get_clientdata(client);
 218         i2c_detach_client(client);
 219         video_unregister_device(vd);
 220         kfree(vd->priv);
 221         kfree(vd);
 222         kfree(client);
 223         return 0;
 224 }
 225
 226 /* new I2C driver support */
 227
 228 static struct i2c_driver i2c_driver_videotext =
 229 {
 230         .driver = {
 231                 .name   = IF_NAME,              /* name */
 232         },
 233         .id             = I2C_DRIVERID_SAA5249, /* in i2c.h */
 234         .attach_adapter = saa5249_probe,
 235         .detach_client  = saa5249_detach,
 236 };
 237
 238 static struct i2c_client client_template = {
 239         .driver         = &i2c_driver_videotext,
 240         .name           = "(unset)",
 241 };
 242
 243 /*
 244  *      Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
 245  *      delay may be longer.
 246  */
 247
 248 static void jdelay(unsigned long delay)
 249 {
 250         sigset_t oldblocked = current->blocked;
 251
 252         spin_lock_irq(&current->sighand->siglock);
 253         sigfillset(&current->blocked);
 254         recalc_sigpending();
 255         spin_unlock_irq(&current->sighand->siglock);
 256         msleep_interruptible(jiffies_to_msecs(delay));
 257
 258         spin_lock_irq(&current->sighand->siglock);
 259         current->blocked = oldblocked;
 260         recalc_sigpending();
 261         spin_unlock_irq(&current->sighand->siglock);
 262 }
 263
 264
 265 /*
 266  *      I2C interfaces
 267  */
 268
 269 static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data)
 270 {
 271         char buf[64];
 272
 273         buf[0] = reg;
 274         memcpy(buf+1, data, count);
 275
 276         if(i2c_master_send(t->client, buf, count+1)==count+1)
 277                 return 0;
 278         return -1;
 279 }
 280
 281 static int i2c_senddata(struct saa5249_device *t, ...)
 282 {
 283         unsigned char buf[64];
 284         int v;
 285         int ct = 0;
 286         va_list argp;
 287         va_start(argp,t);
 288
 289         while ((v = va_arg(argp, int)) != -1)
 290                 buf[ct++] = v;
 291
 292         va_end(argp);
 293         return i2c_sendbuf(t, buf[0], ct-1, buf+1);
 294 }
 295
 296 /* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop
 297  * handshaking is done by this routine, ack will be sent after the last byte to inhibit further
 298  * sending of data. If uaccess is 'true', data is written to user-space with put_user.
 299  * Returns -1 if I²C-device didn't send acknowledge, 0 otherwise
 300  */
 301
 302 static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf)
 303 {
 304         if(i2c_master_recv(t->client, buf, count)!=count)
 305                 return -1;
 306         return 0;
 307 }
 308
 309
 310 /*
 311  *      Standard character-device-driver functions
 312  */
 313
 314 static int do_saa5249_ioctl(struct inode *inode, struct file *file,
 315                             unsigned int cmd, void *arg)
 316 {
 317         static int virtual_mode = false;
 318         struct video_device *vd = video_devdata(file);
 319         struct saa5249_device *t=vd->priv;
 320
 321         switch(cmd)
 322         {
 323                 case VTXIOCGETINFO:
 324                 {
 325                         vtx_info_t *info = arg;
 326                         info->version_major = VTX_VER_MAJ;
 327                         info->version_minor = VTX_VER_MIN;
 328                         info->numpages = NUM_DAUS;
 329                         /*info->cct_type = CCT_TYPE;*/
 330                         return 0;
 331                 }
 332
 333                 case VTXIOCCLRPAGE:
 334                 {
 335                         vtx_pagereq_t *req = arg;
 336
 337                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 338                                 return -EINVAL;
 339                         memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 340                         t->vdau[req->pgbuf].clrfound = true;
 341                         return 0;
 342                 }
 343
 344                 case VTXIOCCLRFOUND:
 345                 {
 346                         vtx_pagereq_t *req = arg;
 347
 348                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 349                                 return -EINVAL;
 350                         t->vdau[req->pgbuf].clrfound = true;
 351                         return 0;
 352                 }
 353
 354                 case VTXIOCPAGEREQ:
 355                 {
 356                         vtx_pagereq_t *req = arg;
 357                         if (!(req->pagemask & PGMASK_PAGE))
 358                                 req->page = 0;
 359                         if (!(req->pagemask & PGMASK_HOUR))
 360                                 req->hour = 0;
 361                         if (!(req->pagemask & PGMASK_MINUTE))
 362                                 req->minute = 0;
 363                         if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
 364                                 return -EINVAL;
 365                         req->page &= 0x7ff;
 366                         if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
 367                                 req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 368                                 return -EINVAL;
 369                         t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
 370                         t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
 371                         t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
 372                         t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
 373                         t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
 374                         t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
 375                         t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
 376                         t->vdau[req->pgbuf].stopped = false;
 377                         t->vdau[req->pgbuf].clrfound = true;
 378                         t->is_searching[req->pgbuf] = true;
 379                         return 0;
 380                 }
 381
 382                 case VTXIOCGETSTAT:
 383                 {
 384                         vtx_pagereq_t *req = arg;
 385                         u8 infobits[10];
 386                         vtx_pageinfo_t info;
 387                         int a;
 388
 389                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 390                                 return -EINVAL;
 391                         if (!t->vdau[req->pgbuf].stopped)
 392                         {
 393                                 if (i2c_senddata(t, 2, 0, -1) ||
 394                                         i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
 395                                         i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
 396                                         i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
 397                                         i2c_senddata(t, 8, 0, 25, 0, -1))
 398                                         return -EIO;
 399                                 jdelay(PAGE_WAIT);
 400                                 if (i2c_getdata(t, 10, infobits))
 401                                         return -EIO;
 402
 403                                 if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) &&   /* check FOUND-bit */
 404                                         (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
 405                                         time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
 406                                 {               /* check if new page arrived */
 407                                         if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
 408                                                 i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
 409                                                 return -EIO;
 410                                         t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
 411                                         memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
 412                                         if (t->virtual_mode)
 413                                         {
 414                                                 /* Packet X/24 */
 415                                                 if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
 416                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
 417                                                         return -EIO;
 418                                                 /* Packet X/27/0 */
 419                                                 if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
 420                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
 421                                                         return -EIO;
 422                                                 /* Packet 8/30/0...8/30/15
 423                                                  * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
 424                                                  *        so we should undo this here.
 425                                                  */
 426                                                 if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
 427                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
 428                                                         return -EIO;
 429                                         }
 430                                         t->vdau[req->pgbuf].clrfound = false;
 431                                         memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
 432                                 }
 433                                 else
 434                                 {
 435                                         memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
 436                                 }
 437                         }
 438                         else
 439                         {
 440                                 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
 441                         }
 442
 443                         info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
 444                         if (info.pagenum < 0x100)
 445                                 info.pagenum += 0x800;
 446                         info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
 447                         info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
 448                         info.charset = ((infobits[7] >> 1) & 7);
 449                         info.delete = !!(infobits[3] & 8);
 450                         info.headline = !!(infobits[5] & 4);
 451                         info.subtitle = !!(infobits[5] & 8);
 452                         info.supp_header = !!(infobits[6] & 1);
 453                         info.update = !!(infobits[6] & 2);
 454                         info.inter_seq = !!(infobits[6] & 4);
 455                         info.dis_disp = !!(infobits[6] & 8);
 456                         info.serial = !!(infobits[7] & 1);
 457                         info.notfound = !!(infobits[8] & 0x10);
 458                         info.pblf = !!(infobits[9] & 0x20);
 459                         info.hamming = 0;
 460                         for (a = 0; a <= 7; a++)
 461                         {
 462                                 if (infobits[a] & 0xf0)
 463                                 {
 464                                         info.hamming = 1;
 465                                         break;
 466                                 }
 467                         }
 468                         if (t->vdau[req->pgbuf].clrfound)
 469                                 info.notfound = 1;
 470                         if(copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
 471                                 return -EFAULT;
 472                         if (!info.hamming && !info.notfound)
 473                         {
 474                                 t->is_searching[req->pgbuf] = false;
 475                         }
 476                         return 0;
 477                 }
 478
 479                 case VTXIOCGETPAGE:
 480                 {
 481                         vtx_pagereq_t *req = arg;
 482                         int start, end;
 483
 484                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
 485                                 req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
 486                                 return -EINVAL;
 487                         if(copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
 488                                 return -EFAULT;
 489
 490                          /*
 491                           *     Always read the time directly from SAA5249
 492                           */
 493
 494                         if (req->start <= 39 && req->end >= 32)
 495                         {
 496                                 int len;
 497                                 char buf[16];
 498                                 start = max(req->start, 32);
 499                                 end = min(req->end, 39);
 500                                 len=end-start+1;
 501                                 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
 502                                         i2c_getdata(t, len, buf))
 503                                         return -EIO;
 504                                 if(copy_to_user(req->buffer+start-req->start, buf, len))
 505                                         return -EFAULT;
 506                         }
 507                         /* Insert the current header if DAU is still searching for a page */
 508                         if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf])
 509                         {
 510                                 char buf[32];
 511                                 int len;
 512                                 start = max(req->start, 7);
 513                                 end = min(req->end, 31);
 514                                 len=end-start+1;
 515                                 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
 516                                         i2c_getdata(t, len, buf))
 517                                         return -EIO;
 518                                 if(copy_to_user(req->buffer+start-req->start, buf, len))
 519                                         return -EFAULT;
 520                         }
 521                         return 0;
 522                 }
 523
 524                 case VTXIOCSTOPDAU:
 525                 {
 526                         vtx_pagereq_t *req = arg;
 527
 528                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 529                                 return -EINVAL;
 530                         t->vdau[req->pgbuf].stopped = true;
 531                         t->is_searching[req->pgbuf] = false;
 532                         return 0;
 533                 }
 534
 535                 case VTXIOCPUTPAGE:
 536                 case VTXIOCSETDISP:
 537                 case VTXIOCPUTSTAT:
 538                         return 0;
 539
 540                 case VTXIOCCLRCACHE:
 541                 {
 542                         if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
 543                                 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',
 544                                 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ', -1))
 545                                 return -EIO;
 546                         if (i2c_senddata(t, 3, 0x20, -1))
 547                                 return -EIO;
 548                         jdelay(10 * CLEAR_DELAY);                       /* I have no idea how long we have to wait here */
 549                         return 0;
 550                 }
 551
 552                 case VTXIOCSETVIRT:
 553                 {
 554                         /* The SAA5249 has virtual-row reception turned on always */
 555                         t->virtual_mode = (int)(long)arg;
 556                         return 0;
 557                 }
 558         }
 559         return -EINVAL;
 560 }
 561
 562 /*
 563  * Translates old vtx IOCTLs to new ones
 564  *
 565  * This keeps new kernel versions compatible with old userspace programs.
 566  */
 567 static inline unsigned int vtx_fix_command(unsigned int cmd)
 568 {
 569         switch (cmd) {
 570         case VTXIOCGETINFO_OLD:
 571                 cmd = VTXIOCGETINFO;
 572                 break;
 573         case VTXIOCCLRPAGE_OLD:
 574                 cmd = VTXIOCCLRPAGE;
 575                 break;
 576         case VTXIOCCLRFOUND_OLD:
 577                 cmd = VTXIOCCLRFOUND;
 578                 break;
 579         case VTXIOCPAGEREQ_OLD:
 580                 cmd = VTXIOCPAGEREQ;
 581                 break;
 582         case VTXIOCGETSTAT_OLD:
 583                 cmd = VTXIOCGETSTAT;
 584                 break;
 585         case VTXIOCGETPAGE_OLD:
 586                 cmd = VTXIOCGETPAGE;
 587                 break;
 588         case VTXIOCSTOPDAU_OLD:
 589                 cmd = VTXIOCSTOPDAU;
 590                 break;
 591         case VTXIOCPUTPAGE_OLD:
 592                 cmd = VTXIOCPUTPAGE;
 593                 break;
 594         case VTXIOCSETDISP_OLD:
 595                 cmd = VTXIOCSETDISP;
 596                 break;
 597         case VTXIOCPUTSTAT_OLD:
 598                 cmd = VTXIOCPUTSTAT;
 599                 break;
 600         case VTXIOCCLRCACHE_OLD:
 601                 cmd = VTXIOCCLRCACHE;
 602                 break;
 603         case VTXIOCSETVIRT_OLD:
 604                 cmd = VTXIOCSETVIRT;
 605                 break;
 606         }
 607         return cmd;
 608 }
 609
 610 /*
 611  *      Handle the locking
 612  */
 613
 614 static int saa5249_ioctl(struct inode *inode, struct file *file,
 615                          unsigned int cmd, unsigned long arg)
 616 {
 617         struct video_device *vd = video_devdata(file);
 618         struct saa5249_device *t=vd->priv;
 619         int err;
 620
 621         cmd = vtx_fix_command(cmd);
 622         mutex_lock(&t->lock);
 623         err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
 624         mutex_unlock(&t->lock);
 625         return err;
 626 }
 627
 628 static int saa5249_open(struct inode *inode, struct file *file)
 629 {
 630         struct video_device *vd = video_devdata(file);
 631         struct saa5249_device *t=vd->priv;
 632         int err,pgbuf;
 633
 634         err = video_exclusive_open(inode,file);
 635         if (err < 0)
 636                 return err;
 637
 638         if (t->client==NULL) {
 639                 err = -ENODEV;
 640                 goto fail;
 641         }
 642
 643         if (i2c_senddata(t, 0, 0, -1) ||                /* Select R11 */
 644                                                 /* Turn off parity checks (we do this ourselves) */
 645                 i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
 646                                                 /* Display TV-picture, no virtual rows */
 647                 i2c_senddata(t, 4, NUM_DAUS, disp_modes[t->disp_mode][1], disp_modes[t->disp_mode][2], 7, -1)) /* Set display to page 4 */
 648
 649         {
 650                 err = -EIO;
 651                 goto fail;
 652         }
 653
 654         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
 655         {
 656                 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 657                 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
 658                 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
 659                 t->vdau[pgbuf].expire = 0;
 660                 t->vdau[pgbuf].clrfound = true;
 661                 t->vdau[pgbuf].stopped = true;
 662                 t->is_searching[pgbuf] = false;
 663         }
 664         t->virtual_mode = false;
 665         return 0;
 666
 667  fail:
 668         video_exclusive_release(inode,file);
 669         return err;
 670 }
 671
 672
 673
 674 static int saa5249_release(struct inode *inode, struct file *file)
 675 {
 676         struct video_device *vd = video_devdata(file);
 677         struct saa5249_device *t=vd->priv;
 678         i2c_senddata(t, 1, 0x20, -1);           /* Turn off CCT */
 679         i2c_senddata(t, 5, 3, 3, -1);           /* Turn off TV-display */
 680         video_exclusive_release(inode,file);
 681         return 0;
 682 }
 683
 684 static int __init init_saa_5249 (void)
 685 {
 686         printk(KERN_INFO "SAA5249 driver (" IF_NAME " interface) for VideoText version %d.%d\n",
 687                         VTX_VER_MAJ, VTX_VER_MIN);
 688         return i2c_add_driver(&i2c_driver_videotext);
 689 }
 690
 691 static void __exit cleanup_saa_5249 (void)
 692 {
 693         i2c_del_driver(&i2c_driver_videotext);
 694 }
 695
 696 module_init(init_saa_5249);
 697 module_exit(cleanup_saa_5249);
 698
 699 static const struct file_operations saa_fops = {
 700         .owner          = THIS_MODULE,
 701         .open           = saa5249_open,
 702         .release        = saa5249_release,
 703         .ioctl          = saa5249_ioctl,
 704 #ifdef CONFIG_COMPAT
 705         .compat_ioctl   = v4l_compat_ioctl32,
 706 #endif
 707         .llseek         = no_llseek,
 708 };
 709
 710 static struct video_device saa_template =
 711 {
 712         .owner          = THIS_MODULE,
 713         .name           = IF_NAME,
 714         .type           = VID_TYPE_TELETEXT,    /*| VID_TYPE_TUNER ?? */
 715         .fops           = &saa_fops,
 716 };
 717
 718 MODULE_LICENSE("GPL");