git.oblomov.eu Git - linux-2.6/blob - 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 <linux/mutex.h>
  60
  61
  62 #include <asm/io.h>
  63 #include <asm/uaccess.h>
  64
  65 #define VTX_VER_MAJ 1
  66 #define VTX_VER_MIN 8
  67
  68
  69
  70 #define NUM_DAUS 4
  71 #define NUM_BUFS 8
  72 #define IF_NAME "SAA5249"
  73
  74 static const int disp_modes[8][3] =
  75 {
  76         { 0x46, 0x03, 0x03 },   /* DISPOFF */
  77         { 0x46, 0xcc, 0xcc },   /* DISPNORM */
  78         { 0x44, 0x0f, 0x0f },   /* DISPTRANS */
  79         { 0x46, 0xcc, 0x46 },   /* DISPINS */
  80         { 0x44, 0x03, 0x03 },   /* DISPOFF, interlaced */
  81         { 0x44, 0xcc, 0xcc },   /* DISPNORM, interlaced */
  82         { 0x44, 0x0f, 0x0f },   /* DISPTRANS, interlaced */
  83         { 0x44, 0xcc, 0x46 }    /* DISPINS, interlaced */
  84 };
  85
  86
  87
  88 #define PAGE_WAIT (300*HZ/1000)                 /* Time between requesting page and */
  89                                                 /* checking status bits */
  90 #define PGBUF_EXPIRE (15*HZ)                    /* Time to wait before retransmitting */
  91                                                 /* page regardless of infobits */
  92 typedef struct {
  93         u8 pgbuf[VTX_VIRTUALSIZE];              /* Page-buffer */
  94         u8 laststat[10];                        /* Last value of infobits for DAU */
  95         u8 sregs[7];                            /* Page-request registers */
  96         unsigned long expire;                   /* Time when page will be expired */
  97         unsigned clrfound : 1;                  /* VTXIOCCLRFOUND has been called */
  98         unsigned stopped : 1;                   /* VTXIOCSTOPDAU has been called */
  99 } vdau_t;
 100
 101 struct saa5249_device
 102 {
 103         vdau_t vdau[NUM_DAUS];                  /* Data for virtual DAUs (the 5249 only has one */
 104                                                 /* real DAU, so we have to simulate some more) */
 105         int vtx_use_count;
 106         int is_searching[NUM_DAUS];
 107         int disp_mode;
 108         int virtual_mode;
 109         struct i2c_client *client;
 110         struct mutex lock;
 111 };
 112
 113
 114 #define CCTWR 34                /* I²C write/read-address of vtx-chip */
 115 #define CCTRD 35
 116 #define NOACK_REPEAT 10         /* Retry access this many times on failure */
 117 #define CLEAR_DELAY (HZ/20)     /* Time required to clear a page */
 118 #define READY_TIMEOUT (30*HZ/1000)      /* Time to wait for ready signal of I²C-bus interface */
 119 #define INIT_DELAY 500          /* Time in usec to wait at initialization of CEA interface */
 120 #define START_DELAY 10          /* Time in usec to wait before starting write-cycle (CEA) */
 121
 122 #define VTX_DEV_MINOR 0
 123
 124 /* General defines and debugging support */
 125
 126 #ifndef FALSE
 127 #define FALSE 0
 128 #define TRUE 1
 129 #endif
 130
 131 #define RESCHED do { cond_resched(); } while(0)
 132
 133 static struct video_device saa_template;        /* Declared near bottom */
 134
 135 /* Addresses to scan */
 136 static unsigned short normal_i2c[] = {34>>1,I2C_CLIENT_END};
 137 I2C_CLIENT_INSMOD;
 138
 139 static struct i2c_client client_template;
 140
 141 static int saa5249_attach(struct i2c_adapter *adap, int addr, int kind)
 142 {
 143         int pgbuf;
 144         int err;
 145         struct i2c_client *client;
 146         struct video_device *vd;
 147         struct saa5249_device *t;
 148
 149         printk(KERN_INFO "saa5249: teletext chip found.\n");
 150         client=kmalloc(sizeof(*client), GFP_KERNEL);
 151         if(client==NULL)
 152                 return -ENOMEM;
 153         client_template.adapter = adap;
 154         client_template.addr = addr;
 155         memcpy(client, &client_template, sizeof(*client));
 156         t = kzalloc(sizeof(*t), GFP_KERNEL);
 157         if(t==NULL)
 158         {
 159                 kfree(client);
 160                 return -ENOMEM;
 161         }
 162         strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
 163         mutex_init(&t->lock);
 164
 165         /*
 166          *      Now create a video4linux device
 167          */
 168
 169         vd = kmalloc(sizeof(struct video_device), GFP_KERNEL);
 170         if(vd==NULL)
 171         {
 172                 kfree(t);
 173                 kfree(client);
 174                 return -ENOMEM;
 175         }
 176         i2c_set_clientdata(client, vd);
 177         memcpy(vd, &saa_template, sizeof(*vd));
 178
 179         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
 180         {
 181                 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 182                 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
 183                 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
 184                 t->vdau[pgbuf].expire = 0;
 185                 t->vdau[pgbuf].clrfound = TRUE;
 186                 t->vdau[pgbuf].stopped = TRUE;
 187                 t->is_searching[pgbuf] = FALSE;
 188         }
 189         vd->priv=t;
 190
 191
 192         /*
 193          *      Register it
 194          */
 195
 196         if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
 197         {
 198                 kfree(t);
 199                 kfree(vd);
 200                 kfree(client);
 201                 return err;
 202         }
 203         t->client = client;
 204         i2c_attach_client(client);
 205         return 0;
 206 }
 207
 208 /*
 209  *      We do most of the hard work when we become a device on the i2c.
 210  */
 211
 212 static int saa5249_probe(struct i2c_adapter *adap)
 213 {
 214         if (adap->class & I2C_CLASS_TV_ANALOG)
 215                 return i2c_probe(adap, &addr_data, saa5249_attach);
 216         return 0;
 217 }
 218
 219 static int saa5249_detach(struct i2c_client *client)
 220 {
 221         struct video_device *vd = i2c_get_clientdata(client);
 222         i2c_detach_client(client);
 223         video_unregister_device(vd);
 224         kfree(vd->priv);
 225         kfree(vd);
 226         kfree(client);
 227         return 0;
 228 }
 229
 230 /* new I2C driver support */
 231
 232 static struct i2c_driver i2c_driver_videotext =
 233 {
 234         .driver = {
 235                 .name   = IF_NAME,              /* name */
 236         },
 237         .id             = I2C_DRIVERID_SAA5249, /* in i2c.h */
 238         .attach_adapter = saa5249_probe,
 239         .detach_client  = saa5249_detach,
 240 };
 241
 242 static struct i2c_client client_template = {
 243         .driver         = &i2c_driver_videotext,
 244         .name           = "(unset)",
 245 };
 246
 247 /*
 248  *      Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
 249  *      delay may be longer.
 250  */
 251
 252 static void jdelay(unsigned long delay)
 253 {
 254         sigset_t oldblocked = current->blocked;
 255
 256         spin_lock_irq(&current->sighand->siglock);
 257         sigfillset(&current->blocked);
 258         recalc_sigpending();
 259         spin_unlock_irq(&current->sighand->siglock);
 260         msleep_interruptible(jiffies_to_msecs(delay));
 261
 262         spin_lock_irq(&current->sighand->siglock);
 263         current->blocked = oldblocked;
 264         recalc_sigpending();
 265         spin_unlock_irq(&current->sighand->siglock);
 266 }
 267
 268
 269 /*
 270  *      I2C interfaces
 271  */
 272
 273 static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data)
 274 {
 275         char buf[64];
 276
 277         buf[0] = reg;
 278         memcpy(buf+1, data, count);
 279
 280         if(i2c_master_send(t->client, buf, count+1)==count+1)
 281                 return 0;
 282         return -1;
 283 }
 284
 285 static int i2c_senddata(struct saa5249_device *t, ...)
 286 {
 287         unsigned char buf[64];
 288         int v;
 289         int ct=0;
 290         va_list argp;
 291         va_start(argp,t);
 292
 293         while((v=va_arg(argp,int))!=-1)
 294                 buf[ct++]=v;
 295         return i2c_sendbuf(t, buf[0], ct-1, buf+1);
 296 }
 297
 298 /* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop
 299  * handshaking is done by this routine, ack will be sent after the last byte to inhibit further
 300  * sending of data. If uaccess is TRUE, data is written to user-space with put_user.
 301  * Returns -1 if I²C-device didn't send acknowledge, 0 otherwise
 302  */
 303
 304 static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf)
 305 {
 306         if(i2c_master_recv(t->client, buf, count)!=count)
 307                 return -1;
 308         return 0;
 309 }
 310
 311
 312 /*
 313  *      Standard character-device-driver functions
 314  */
 315
 316 static int do_saa5249_ioctl(struct inode *inode, struct file *file,
 317                             unsigned int cmd, void *arg)
 318 {
 319         static int virtual_mode = FALSE;
 320         struct video_device *vd = video_devdata(file);
 321         struct saa5249_device *t=vd->priv;
 322
 323         switch(cmd)
 324         {
 325                 case VTXIOCGETINFO:
 326                 {
 327                         vtx_info_t *info = arg;
 328                         info->version_major = VTX_VER_MAJ;
 329                         info->version_minor = VTX_VER_MIN;
 330                         info->numpages = NUM_DAUS;
 331                         /*info->cct_type = CCT_TYPE;*/
 332                         return 0;
 333                 }
 334
 335                 case VTXIOCCLRPAGE:
 336                 {
 337                         vtx_pagereq_t *req = arg;
 338
 339                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 340                                 return -EINVAL;
 341                         memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 342                         t->vdau[req->pgbuf].clrfound = TRUE;
 343                         return 0;
 344                 }
 345
 346                 case VTXIOCCLRFOUND:
 347                 {
 348                         vtx_pagereq_t *req = arg;
 349
 350                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 351                                 return -EINVAL;
 352                         t->vdau[req->pgbuf].clrfound = TRUE;
 353                         return 0;
 354                 }
 355
 356                 case VTXIOCPAGEREQ:
 357                 {
 358                         vtx_pagereq_t *req = arg;
 359                         if (!(req->pagemask & PGMASK_PAGE))
 360                                 req->page = 0;
 361                         if (!(req->pagemask & PGMASK_HOUR))
 362                                 req->hour = 0;
 363                         if (!(req->pagemask & PGMASK_MINUTE))
 364                                 req->minute = 0;
 365                         if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
 366                                 return -EINVAL;
 367                         req->page &= 0x7ff;
 368                         if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
 369                                 req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 370                                 return -EINVAL;
 371                         t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
 372                         t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
 373                         t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
 374                         t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
 375                         t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
 376                         t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
 377                         t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
 378                         t->vdau[req->pgbuf].stopped = FALSE;
 379                         t->vdau[req->pgbuf].clrfound = TRUE;
 380                         t->is_searching[req->pgbuf] = TRUE;
 381                         return 0;
 382                 }
 383
 384                 case VTXIOCGETSTAT:
 385                 {
 386                         vtx_pagereq_t *req = arg;
 387                         u8 infobits[10];
 388                         vtx_pageinfo_t info;
 389                         int a;
 390
 391                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 392                                 return -EINVAL;
 393                         if (!t->vdau[req->pgbuf].stopped)
 394                         {
 395                                 if (i2c_senddata(t, 2, 0, -1) ||
 396                                         i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
 397                                         i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
 398                                         i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
 399                                         i2c_senddata(t, 8, 0, 25, 0, -1))
 400                                         return -EIO;
 401                                 jdelay(PAGE_WAIT);
 402                                 if (i2c_getdata(t, 10, infobits))
 403                                         return -EIO;
 404
 405                                 if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) &&   /* check FOUND-bit */
 406                                         (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
 407                                         time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
 408                                 {               /* check if new page arrived */
 409                                         if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
 410                                                 i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
 411                                                 return -EIO;
 412                                         t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
 413                                         memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
 414                                         if (t->virtual_mode)
 415                                         {
 416                                                 /* Packet X/24 */
 417                                                 if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
 418                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
 419                                                         return -EIO;
 420                                                 /* Packet X/27/0 */
 421                                                 if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
 422                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
 423                                                         return -EIO;
 424                                                 /* Packet 8/30/0...8/30/15
 425                                                  * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
 426                                                  *        so we should undo this here.
 427                                                  */
 428                                                 if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
 429                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
 430                                                         return -EIO;
 431                                         }
 432                                         t->vdau[req->pgbuf].clrfound = FALSE;
 433                                         memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
 434                                 }
 435                                 else
 436                                 {
 437                                         memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
 438                                 }
 439                         }
 440                         else
 441                         {
 442                                 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
 443                         }
 444
 445                         info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
 446                         if (info.pagenum < 0x100)
 447                                 info.pagenum += 0x800;
 448                         info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
 449                         info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
 450                         info.charset = ((infobits[7] >> 1) & 7);
 451                         info.delete = !!(infobits[3] & 8);
 452                         info.headline = !!(infobits[5] & 4);
 453                         info.subtitle = !!(infobits[5] & 8);
 454                         info.supp_header = !!(infobits[6] & 1);
 455                         info.update = !!(infobits[6] & 2);
 456                         info.inter_seq = !!(infobits[6] & 4);
 457                         info.dis_disp = !!(infobits[6] & 8);
 458                         info.serial = !!(infobits[7] & 1);
 459                         info.notfound = !!(infobits[8] & 0x10);
 460                         info.pblf = !!(infobits[9] & 0x20);
 461                         info.hamming = 0;
 462                         for (a = 0; a <= 7; a++)
 463                         {
 464                                 if (infobits[a] & 0xf0)
 465                                 {
 466                                         info.hamming = 1;
 467                                         break;
 468                                 }
 469                         }
 470                         if (t->vdau[req->pgbuf].clrfound)
 471                                 info.notfound = 1;
 472                         if(copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
 473                                 return -EFAULT;
 474                         if (!info.hamming && !info.notfound)
 475                         {
 476                                 t->is_searching[req->pgbuf] = FALSE;
 477                         }
 478                         return 0;
 479                 }
 480
 481                 case VTXIOCGETPAGE:
 482                 {
 483                         vtx_pagereq_t *req = arg;
 484                         int start, end;
 485
 486                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
 487                                 req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
 488                                 return -EINVAL;
 489                         if(copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
 490                                 return -EFAULT;
 491
 492                          /*
 493                           *     Always read the time directly from SAA5249
 494                           */
 495
 496                         if (req->start <= 39 && req->end >= 32)
 497                         {
 498                                 int len;
 499                                 char buf[16];
 500                                 start = max(req->start, 32);
 501                                 end = min(req->end, 39);
 502                                 len=end-start+1;
 503                                 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
 504                                         i2c_getdata(t, len, buf))
 505                                         return -EIO;
 506                                 if(copy_to_user(req->buffer+start-req->start, buf, len))
 507                                         return -EFAULT;
 508                         }
 509                         /* Insert the current header if DAU is still searching for a page */
 510                         if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf])
 511                         {
 512                                 char buf[32];
 513                                 int len;
 514                                 start = max(req->start, 7);
 515                                 end = min(req->end, 31);
 516                                 len=end-start+1;
 517                                 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
 518                                         i2c_getdata(t, len, buf))
 519                                         return -EIO;
 520                                 if(copy_to_user(req->buffer+start-req->start, buf, len))
 521                                         return -EFAULT;
 522                         }
 523                         return 0;
 524                 }
 525
 526                 case VTXIOCSTOPDAU:
 527                 {
 528                         vtx_pagereq_t *req = arg;
 529
 530                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 531                                 return -EINVAL;
 532                         t->vdau[req->pgbuf].stopped = TRUE;
 533                         t->is_searching[req->pgbuf] = FALSE;
 534                         return 0;
 535                 }
 536
 537                 case VTXIOCPUTPAGE:
 538                 case VTXIOCSETDISP:
 539                 case VTXIOCPUTSTAT:
 540                         return 0;
 541
 542                 case VTXIOCCLRCACHE:
 543                 {
 544                         if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
 545                                 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',
 546                                 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ', -1))
 547                                 return -EIO;
 548                         if (i2c_senddata(t, 3, 0x20, -1))
 549                                 return -EIO;
 550                         jdelay(10 * CLEAR_DELAY);                       /* I have no idea how long we have to wait here */
 551                         return 0;
 552                 }
 553
 554                 case VTXIOCSETVIRT:
 555                 {
 556                         /* The SAA5249 has virtual-row reception turned on always */
 557                         t->virtual_mode = (int)(long)arg;
 558                         return 0;
 559                 }
 560         }
 561         return -EINVAL;
 562 }
 563
 564 /*
 565  * Translates old vtx IOCTLs to new ones
 566  *
 567  * This keeps new kernel versions compatible with old userspace programs.
 568  */
 569 static inline unsigned int vtx_fix_command(unsigned int cmd)
 570 {
 571         switch (cmd) {
 572         case VTXIOCGETINFO_OLD:
 573                 cmd = VTXIOCGETINFO;
 574                 break;
 575         case VTXIOCCLRPAGE_OLD:
 576                 cmd = VTXIOCCLRPAGE;
 577                 break;
 578         case VTXIOCCLRFOUND_OLD:
 579                 cmd = VTXIOCCLRFOUND;
 580                 break;
 581         case VTXIOCPAGEREQ_OLD:
 582                 cmd = VTXIOCPAGEREQ;
 583                 break;
 584         case VTXIOCGETSTAT_OLD:
 585                 cmd = VTXIOCGETSTAT;
 586                 break;
 587         case VTXIOCGETPAGE_OLD:
 588                 cmd = VTXIOCGETPAGE;
 589                 break;
 590         case VTXIOCSTOPDAU_OLD:
 591                 cmd = VTXIOCSTOPDAU;
 592                 break;
 593         case VTXIOCPUTPAGE_OLD:
 594                 cmd = VTXIOCPUTPAGE;
 595                 break;
 596         case VTXIOCSETDISP_OLD:
 597                 cmd = VTXIOCSETDISP;
 598                 break;
 599         case VTXIOCPUTSTAT_OLD:
 600                 cmd = VTXIOCPUTSTAT;
 601                 break;
 602         case VTXIOCCLRCACHE_OLD:
 603                 cmd = VTXIOCCLRCACHE;
 604                 break;
 605         case VTXIOCSETVIRT_OLD:
 606                 cmd = VTXIOCSETVIRT;
 607                 break;
 608         }
 609         return cmd;
 610 }
 611
 612 /*
 613  *      Handle the locking
 614  */
 615
 616 static int saa5249_ioctl(struct inode *inode, struct file *file,
 617                          unsigned int cmd, unsigned long arg)
 618 {
 619         struct video_device *vd = video_devdata(file);
 620         struct saa5249_device *t=vd->priv;
 621         int err;
 622
 623         cmd = vtx_fix_command(cmd);
 624         mutex_lock(&t->lock);
 625         err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
 626         mutex_unlock(&t->lock);
 627         return err;
 628 }
 629
 630 static int saa5249_open(struct inode *inode, struct file *file)
 631 {
 632         struct video_device *vd = video_devdata(file);
 633         struct saa5249_device *t=vd->priv;
 634         int err,pgbuf;
 635
 636         err = video_exclusive_open(inode,file);
 637         if (err < 0)
 638                 return err;
 639
 640         if (t->client==NULL) {
 641                 err = -ENODEV;
 642                 goto fail;
 643         }
 644
 645         if (i2c_senddata(t, 0, 0, -1) ||                /* Select R11 */
 646                                                 /* Turn off parity checks (we do this ourselves) */
 647                 i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
 648                                                 /* Display TV-picture, no virtual rows */
 649                 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 */
 650
 651         {
 652                 err = -EIO;
 653                 goto fail;
 654         }
 655
 656         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
 657         {
 658                 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 659                 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
 660                 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
 661                 t->vdau[pgbuf].expire = 0;
 662                 t->vdau[pgbuf].clrfound = TRUE;
 663                 t->vdau[pgbuf].stopped = TRUE;
 664                 t->is_searching[pgbuf] = FALSE;
 665         }
 666         t->virtual_mode=FALSE;
 667         return 0;
 668
 669  fail:
 670         video_exclusive_release(inode,file);
 671         return err;
 672 }
 673
 674
 675
 676 static int saa5249_release(struct inode *inode, struct file *file)
 677 {
 678         struct video_device *vd = video_devdata(file);
 679         struct saa5249_device *t=vd->priv;
 680         i2c_senddata(t, 1, 0x20, -1);           /* Turn off CCT */
 681         i2c_senddata(t, 5, 3, 3, -1);           /* Turn off TV-display */
 682         video_exclusive_release(inode,file);
 683         return 0;
 684 }
 685
 686 static int __init init_saa_5249 (void)
 687 {
 688         printk(KERN_INFO "SAA5249 driver (" IF_NAME " interface) for VideoText version %d.%d\n",
 689                         VTX_VER_MAJ, VTX_VER_MIN);
 690         return i2c_add_driver(&i2c_driver_videotext);
 691 }
 692
 693 static void __exit cleanup_saa_5249 (void)
 694 {
 695         i2c_del_driver(&i2c_driver_videotext);
 696 }
 697
 698 module_init(init_saa_5249);
 699 module_exit(cleanup_saa_5249);
 700
 701 static struct file_operations saa_fops = {
 702         .owner          = THIS_MODULE,
 703         .open           = saa5249_open,
 704         .release        = saa5249_release,
 705         .ioctl          = saa5249_ioctl,
 706         .compat_ioctl   = v4l_compat_ioctl32,
 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         .hardware       = VID_HARDWARE_SAA5249,
 716         .fops           = &saa_fops,
 717 };
 718
 719 MODULE_LICENSE("GPL");