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 (300*HZ/1000)                 /* Time between requesting page and */
  90                                                 /* checking status bits */
  91 #define PGBUF_EXPIRE (15*HZ)                    /* 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 (HZ/20)     /* Time required to clear a page */
 119 #define READY_TIMEOUT (30*HZ/1000)      /* 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         return i2c_sendbuf(t, buf[0], ct-1, buf+1);
 292 }
 293
 294 /* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop
 295  * handshaking is done by this routine, ack will be sent after the last byte to inhibit further
 296  * sending of data. If uaccess is 'true', data is written to user-space with put_user.
 297  * Returns -1 if I²C-device didn't send acknowledge, 0 otherwise
 298  */
 299
 300 static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf)
 301 {
 302         if(i2c_master_recv(t->client, buf, count)!=count)
 303                 return -1;
 304         return 0;
 305 }
 306
 307
 308 /*
 309  *      Standard character-device-driver functions
 310  */
 311
 312 static int do_saa5249_ioctl(struct inode *inode, struct file *file,
 313                             unsigned int cmd, void *arg)
 314 {
 315         static int virtual_mode = false;
 316         struct video_device *vd = video_devdata(file);
 317         struct saa5249_device *t=vd->priv;
 318
 319         switch(cmd)
 320         {
 321                 case VTXIOCGETINFO:
 322                 {
 323                         vtx_info_t *info = arg;
 324                         info->version_major = VTX_VER_MAJ;
 325                         info->version_minor = VTX_VER_MIN;
 326                         info->numpages = NUM_DAUS;
 327                         /*info->cct_type = CCT_TYPE;*/
 328                         return 0;
 329                 }
 330
 331                 case VTXIOCCLRPAGE:
 332                 {
 333                         vtx_pagereq_t *req = arg;
 334
 335                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 336                                 return -EINVAL;
 337                         memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 338                         t->vdau[req->pgbuf].clrfound = true;
 339                         return 0;
 340                 }
 341
 342                 case VTXIOCCLRFOUND:
 343                 {
 344                         vtx_pagereq_t *req = arg;
 345
 346                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 347                                 return -EINVAL;
 348                         t->vdau[req->pgbuf].clrfound = true;
 349                         return 0;
 350                 }
 351
 352                 case VTXIOCPAGEREQ:
 353                 {
 354                         vtx_pagereq_t *req = arg;
 355                         if (!(req->pagemask & PGMASK_PAGE))
 356                                 req->page = 0;
 357                         if (!(req->pagemask & PGMASK_HOUR))
 358                                 req->hour = 0;
 359                         if (!(req->pagemask & PGMASK_MINUTE))
 360                                 req->minute = 0;
 361                         if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
 362                                 return -EINVAL;
 363                         req->page &= 0x7ff;
 364                         if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
 365                                 req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 366                                 return -EINVAL;
 367                         t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
 368                         t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
 369                         t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
 370                         t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
 371                         t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
 372                         t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
 373                         t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
 374                         t->vdau[req->pgbuf].stopped = false;
 375                         t->vdau[req->pgbuf].clrfound = true;
 376                         t->is_searching[req->pgbuf] = true;
 377                         return 0;
 378                 }
 379
 380                 case VTXIOCGETSTAT:
 381                 {
 382                         vtx_pagereq_t *req = arg;
 383                         u8 infobits[10];
 384                         vtx_pageinfo_t info;
 385                         int a;
 386
 387                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 388                                 return -EINVAL;
 389                         if (!t->vdau[req->pgbuf].stopped)
 390                         {
 391                                 if (i2c_senddata(t, 2, 0, -1) ||
 392                                         i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
 393                                         i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
 394                                         i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
 395                                         i2c_senddata(t, 8, 0, 25, 0, -1))
 396                                         return -EIO;
 397                                 jdelay(PAGE_WAIT);
 398                                 if (i2c_getdata(t, 10, infobits))
 399                                         return -EIO;
 400
 401                                 if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) &&   /* check FOUND-bit */
 402                                         (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
 403                                         time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
 404                                 {               /* check if new page arrived */
 405                                         if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
 406                                                 i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
 407                                                 return -EIO;
 408                                         t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
 409                                         memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
 410                                         if (t->virtual_mode)
 411                                         {
 412                                                 /* Packet X/24 */
 413                                                 if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
 414                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
 415                                                         return -EIO;
 416                                                 /* Packet X/27/0 */
 417                                                 if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
 418                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
 419                                                         return -EIO;
 420                                                 /* Packet 8/30/0...8/30/15
 421                                                  * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
 422                                                  *        so we should undo this here.
 423                                                  */
 424                                                 if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
 425                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
 426                                                         return -EIO;
 427                                         }
 428                                         t->vdau[req->pgbuf].clrfound = false;
 429                                         memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
 430                                 }
 431                                 else
 432                                 {
 433                                         memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
 434                                 }
 435                         }
 436                         else
 437                         {
 438                                 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
 439                         }
 440
 441                         info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
 442                         if (info.pagenum < 0x100)
 443                                 info.pagenum += 0x800;
 444                         info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
 445                         info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
 446                         info.charset = ((infobits[7] >> 1) & 7);
 447                         info.delete = !!(infobits[3] & 8);
 448                         info.headline = !!(infobits[5] & 4);
 449                         info.subtitle = !!(infobits[5] & 8);
 450                         info.supp_header = !!(infobits[6] & 1);
 451                         info.update = !!(infobits[6] & 2);
 452                         info.inter_seq = !!(infobits[6] & 4);
 453                         info.dis_disp = !!(infobits[6] & 8);
 454                         info.serial = !!(infobits[7] & 1);
 455                         info.notfound = !!(infobits[8] & 0x10);
 456                         info.pblf = !!(infobits[9] & 0x20);
 457                         info.hamming = 0;
 458                         for (a = 0; a <= 7; a++)
 459                         {
 460                                 if (infobits[a] & 0xf0)
 461                                 {
 462                                         info.hamming = 1;
 463                                         break;
 464                                 }
 465                         }
 466                         if (t->vdau[req->pgbuf].clrfound)
 467                                 info.notfound = 1;
 468                         if(copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
 469                                 return -EFAULT;
 470                         if (!info.hamming && !info.notfound)
 471                         {
 472                                 t->is_searching[req->pgbuf] = false;
 473                         }
 474                         return 0;
 475                 }
 476
 477                 case VTXIOCGETPAGE:
 478                 {
 479                         vtx_pagereq_t *req = arg;
 480                         int start, end;
 481
 482                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
 483                                 req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
 484                                 return -EINVAL;
 485                         if(copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
 486                                 return -EFAULT;
 487
 488                          /*
 489                           *     Always read the time directly from SAA5249
 490                           */
 491
 492                         if (req->start <= 39 && req->end >= 32)
 493                         {
 494                                 int len;
 495                                 char buf[16];
 496                                 start = max(req->start, 32);
 497                                 end = min(req->end, 39);
 498                                 len=end-start+1;
 499                                 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
 500                                         i2c_getdata(t, len, buf))
 501                                         return -EIO;
 502                                 if(copy_to_user(req->buffer+start-req->start, buf, len))
 503                                         return -EFAULT;
 504                         }
 505                         /* Insert the current header if DAU is still searching for a page */
 506                         if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf])
 507                         {
 508                                 char buf[32];
 509                                 int len;
 510                                 start = max(req->start, 7);
 511                                 end = min(req->end, 31);
 512                                 len=end-start+1;
 513                                 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
 514                                         i2c_getdata(t, len, buf))
 515                                         return -EIO;
 516                                 if(copy_to_user(req->buffer+start-req->start, buf, len))
 517                                         return -EFAULT;
 518                         }
 519                         return 0;
 520                 }
 521
 522                 case VTXIOCSTOPDAU:
 523                 {
 524                         vtx_pagereq_t *req = arg;
 525
 526                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 527                                 return -EINVAL;
 528                         t->vdau[req->pgbuf].stopped = true;
 529                         t->is_searching[req->pgbuf] = false;
 530                         return 0;
 531                 }
 532
 533                 case VTXIOCPUTPAGE:
 534                 case VTXIOCSETDISP:
 535                 case VTXIOCPUTSTAT:
 536                         return 0;
 537
 538                 case VTXIOCCLRCACHE:
 539                 {
 540                         if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
 541                                 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',
 542                                 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ', -1))
 543                                 return -EIO;
 544                         if (i2c_senddata(t, 3, 0x20, -1))
 545                                 return -EIO;
 546                         jdelay(10 * CLEAR_DELAY);                       /* I have no idea how long we have to wait here */
 547                         return 0;
 548                 }
 549
 550                 case VTXIOCSETVIRT:
 551                 {
 552                         /* The SAA5249 has virtual-row reception turned on always */
 553                         t->virtual_mode = (int)(long)arg;
 554                         return 0;
 555                 }
 556         }
 557         return -EINVAL;
 558 }
 559
 560 /*
 561  * Translates old vtx IOCTLs to new ones
 562  *
 563  * This keeps new kernel versions compatible with old userspace programs.
 564  */
 565 static inline unsigned int vtx_fix_command(unsigned int cmd)
 566 {
 567         switch (cmd) {
 568         case VTXIOCGETINFO_OLD:
 569                 cmd = VTXIOCGETINFO;
 570                 break;
 571         case VTXIOCCLRPAGE_OLD:
 572                 cmd = VTXIOCCLRPAGE;
 573                 break;
 574         case VTXIOCCLRFOUND_OLD:
 575                 cmd = VTXIOCCLRFOUND;
 576                 break;
 577         case VTXIOCPAGEREQ_OLD:
 578                 cmd = VTXIOCPAGEREQ;
 579                 break;
 580         case VTXIOCGETSTAT_OLD:
 581                 cmd = VTXIOCGETSTAT;
 582                 break;
 583         case VTXIOCGETPAGE_OLD:
 584                 cmd = VTXIOCGETPAGE;
 585                 break;
 586         case VTXIOCSTOPDAU_OLD:
 587                 cmd = VTXIOCSTOPDAU;
 588                 break;
 589         case VTXIOCPUTPAGE_OLD:
 590                 cmd = VTXIOCPUTPAGE;
 591                 break;
 592         case VTXIOCSETDISP_OLD:
 593                 cmd = VTXIOCSETDISP;
 594                 break;
 595         case VTXIOCPUTSTAT_OLD:
 596                 cmd = VTXIOCPUTSTAT;
 597                 break;
 598         case VTXIOCCLRCACHE_OLD:
 599                 cmd = VTXIOCCLRCACHE;
 600                 break;
 601         case VTXIOCSETVIRT_OLD:
 602                 cmd = VTXIOCSETVIRT;
 603                 break;
 604         }
 605         return cmd;
 606 }
 607
 608 /*
 609  *      Handle the locking
 610  */
 611
 612 static int saa5249_ioctl(struct inode *inode, struct file *file,
 613                          unsigned int cmd, unsigned long arg)
 614 {
 615         struct video_device *vd = video_devdata(file);
 616         struct saa5249_device *t=vd->priv;
 617         int err;
 618
 619         cmd = vtx_fix_command(cmd);
 620         mutex_lock(&t->lock);
 621         err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
 622         mutex_unlock(&t->lock);
 623         return err;
 624 }
 625
 626 static int saa5249_open(struct inode *inode, struct file *file)
 627 {
 628         struct video_device *vd = video_devdata(file);
 629         struct saa5249_device *t=vd->priv;
 630         int err,pgbuf;
 631
 632         err = video_exclusive_open(inode,file);
 633         if (err < 0)
 634                 return err;
 635
 636         if (t->client==NULL) {
 637                 err = -ENODEV;
 638                 goto fail;
 639         }
 640
 641         if (i2c_senddata(t, 0, 0, -1) ||                /* Select R11 */
 642                                                 /* Turn off parity checks (we do this ourselves) */
 643                 i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
 644                                                 /* Display TV-picture, no virtual rows */
 645                 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 */
 646
 647         {
 648                 err = -EIO;
 649                 goto fail;
 650         }
 651
 652         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
 653         {
 654                 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 655                 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
 656                 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
 657                 t->vdau[pgbuf].expire = 0;
 658                 t->vdau[pgbuf].clrfound = true;
 659                 t->vdau[pgbuf].stopped = true;
 660                 t->is_searching[pgbuf] = false;
 661         }
 662         t->virtual_mode = false;
 663         return 0;
 664
 665  fail:
 666         video_exclusive_release(inode,file);
 667         return err;
 668 }
 669
 670
 671
 672 static int saa5249_release(struct inode *inode, struct file *file)
 673 {
 674         struct video_device *vd = video_devdata(file);
 675         struct saa5249_device *t=vd->priv;
 676         i2c_senddata(t, 1, 0x20, -1);           /* Turn off CCT */
 677         i2c_senddata(t, 5, 3, 3, -1);           /* Turn off TV-display */
 678         video_exclusive_release(inode,file);
 679         return 0;
 680 }
 681
 682 static int __init init_saa_5249 (void)
 683 {
 684         printk(KERN_INFO "SAA5249 driver (" IF_NAME " interface) for VideoText version %d.%d\n",
 685                         VTX_VER_MAJ, VTX_VER_MIN);
 686         return i2c_add_driver(&i2c_driver_videotext);
 687 }
 688
 689 static void __exit cleanup_saa_5249 (void)
 690 {
 691         i2c_del_driver(&i2c_driver_videotext);
 692 }
 693
 694 module_init(init_saa_5249);
 695 module_exit(cleanup_saa_5249);
 696
 697 static const struct file_operations saa_fops = {
 698         .owner          = THIS_MODULE,
 699         .open           = saa5249_open,
 700         .release        = saa5249_release,
 701         .ioctl          = saa5249_ioctl,
 702         .compat_ioctl   = v4l_compat_ioctl32,
 703         .llseek         = no_llseek,
 704 };
 705
 706 static struct video_device saa_template =
 707 {
 708         .owner          = THIS_MODULE,
 709         .name           = IF_NAME,
 710         .type           = VID_TYPE_TELETEXT,    /*| VID_TYPE_TUNER ?? */
 711         .fops           = &saa_fops,
 712 };
 713
 714 MODULE_LICENSE("GPL");