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
  60 #include <asm/io.h>
  61 #include <asm/uaccess.h>
  62
  63 #define VTX_VER_MAJ 1
  64 #define VTX_VER_MIN 8
  65
  66
  67
  68 #define NUM_DAUS 4
  69 #define NUM_BUFS 8
  70 #define IF_NAME "SAA5249"
  71
  72 static const int disp_modes[8][3] =
  73 {
  74         { 0x46, 0x03, 0x03 },   /* DISPOFF */
  75         { 0x46, 0xcc, 0xcc },   /* DISPNORM */
  76         { 0x44, 0x0f, 0x0f },   /* DISPTRANS */
  77         { 0x46, 0xcc, 0x46 },   /* DISPINS */
  78         { 0x44, 0x03, 0x03 },   /* DISPOFF, interlaced */
  79         { 0x44, 0xcc, 0xcc },   /* DISPNORM, interlaced */
  80         { 0x44, 0x0f, 0x0f },   /* DISPTRANS, interlaced */
  81         { 0x44, 0xcc, 0x46 }    /* DISPINS, interlaced */
  82 };
  83
  84
  85
  86 #define PAGE_WAIT (300*HZ/1000)                 /* Time between requesting page and */
  87                                                 /* checking status bits */
  88 #define PGBUF_EXPIRE (15*HZ)                    /* Time to wait before retransmitting */
  89                                                 /* page regardless of infobits */
  90 typedef struct {
  91         u8 pgbuf[VTX_VIRTUALSIZE];              /* Page-buffer */
  92         u8 laststat[10];                        /* Last value of infobits for DAU */
  93         u8 sregs[7];                            /* Page-request registers */
  94         unsigned long expire;                   /* Time when page will be expired */
  95         unsigned clrfound : 1;                  /* VTXIOCCLRFOUND has been called */
  96         unsigned stopped : 1;                   /* VTXIOCSTOPDAU has been called */
  97 } vdau_t;
  98
  99 struct saa5249_device
 100 {
 101         vdau_t vdau[NUM_DAUS];                  /* Data for virtual DAUs (the 5249 only has one */
 102                                                 /* real DAU, so we have to simulate some more) */
 103         int vtx_use_count;
 104         int is_searching[NUM_DAUS];
 105         int disp_mode;
 106         int virtual_mode;
 107         struct i2c_client *client;
 108         struct semaphore lock;
 109 };
 110
 111
 112 #define CCTWR 34                /* I²C write/read-address of vtx-chip */
 113 #define CCTRD 35
 114 #define NOACK_REPEAT 10         /* Retry access this many times on failure */
 115 #define CLEAR_DELAY (HZ/20)     /* Time required to clear a page */
 116 #define READY_TIMEOUT (30*HZ/1000)      /* Time to wait for ready signal of I²C-bus interface */
 117 #define INIT_DELAY 500          /* Time in usec to wait at initialization of CEA interface */
 118 #define START_DELAY 10          /* Time in usec to wait before starting write-cycle (CEA) */
 119
 120 #define VTX_DEV_MINOR 0
 121
 122 /* General defines and debugging support */
 123
 124 #ifndef FALSE
 125 #define FALSE 0
 126 #define TRUE 1
 127 #endif
 128
 129 #define RESCHED do { cond_resched(); } while(0)
 130
 131 static struct video_device saa_template;        /* Declared near bottom */
 132
 133 /* Addresses to scan */
 134 static unsigned short normal_i2c[] = {34>>1,I2C_CLIENT_END};
 135 static unsigned short normal_i2c_range[] = {I2C_CLIENT_END};
 136 static unsigned short probe[2]        = { I2C_CLIENT_END, I2C_CLIENT_END };
 137 static unsigned short probe_range[2]  = { I2C_CLIENT_END, I2C_CLIENT_END };
 138 static unsigned short ignore[2]       = { I2C_CLIENT_END, I2C_CLIENT_END };
 139 static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 140 static unsigned short force[2]        = { I2C_CLIENT_END, I2C_CLIENT_END };
 141
 142 static struct i2c_client_address_data addr_data = {
 143         normal_i2c, normal_i2c_range,
 144         probe, probe_range,
 145         ignore, ignore_range,
 146         force
 147 };
 148
 149 static struct i2c_client client_template;
 150
 151 static int saa5249_attach(struct i2c_adapter *adap, int addr, int kind)
 152 {
 153         int pgbuf;
 154         int err;
 155         struct i2c_client *client;
 156         struct video_device *vd;
 157         struct saa5249_device *t;
 158
 159         printk(KERN_INFO "saa5249: teletext chip found.\n");
 160         client=kmalloc(sizeof(*client), GFP_KERNEL);
 161         if(client==NULL)
 162                 return -ENOMEM;
 163         client_template.adapter = adap;
 164         client_template.addr = addr;
 165         memcpy(client, &client_template, sizeof(*client));
 166         t = kmalloc(sizeof(*t), GFP_KERNEL);
 167         if(t==NULL)
 168         {
 169                 kfree(client);
 170                 return -ENOMEM;
 171         }
 172         memset(t, 0, sizeof(*t));
 173         strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
 174         init_MUTEX(&t->lock);
 175
 176         /*
 177          *      Now create a video4linux device
 178          */
 179
 180         vd = (struct video_device *)kmalloc(sizeof(struct video_device), GFP_KERNEL);
 181         if(vd==NULL)
 182         {
 183                 kfree(t);
 184                 kfree(client);
 185                 return -ENOMEM;
 186         }
 187         i2c_set_clientdata(client, vd);
 188         memcpy(vd, &saa_template, sizeof(*vd));
 189
 190         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
 191         {
 192                 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 193                 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
 194                 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
 195                 t->vdau[pgbuf].expire = 0;
 196                 t->vdau[pgbuf].clrfound = TRUE;
 197                 t->vdau[pgbuf].stopped = TRUE;
 198                 t->is_searching[pgbuf] = FALSE;
 199         }
 200         vd->priv=t;
 201
 202
 203         /*
 204          *      Register it
 205          */
 206
 207         if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
 208         {
 209                 kfree(t);
 210                 kfree(vd);
 211                 kfree(client);
 212                 return err;
 213         }
 214         t->client = client;
 215         i2c_attach_client(client);
 216         return 0;
 217 }
 218
 219 /*
 220  *      We do most of the hard work when we become a device on the i2c.
 221  */
 222
 223 static int saa5249_probe(struct i2c_adapter *adap)
 224 {
 225         if (adap->class & I2C_CLASS_TV_ANALOG)
 226                 return i2c_probe(adap, &addr_data, saa5249_attach);
 227         return 0;
 228 }
 229
 230 static int saa5249_detach(struct i2c_client *client)
 231 {
 232         struct video_device *vd = i2c_get_clientdata(client);
 233         i2c_detach_client(client);
 234         video_unregister_device(vd);
 235         kfree(vd->priv);
 236         kfree(vd);
 237         kfree(client);
 238         return 0;
 239 }
 240
 241 static int saa5249_command(struct i2c_client *device,
 242                              unsigned int cmd, void *arg)
 243 {
 244         return -EINVAL;
 245 }
 246
 247 /* new I2C driver support */
 248
 249 static struct i2c_driver i2c_driver_videotext =
 250 {
 251         .owner          = THIS_MODULE,
 252         .name           = IF_NAME,              /* name */
 253         .id             = I2C_DRIVERID_SAA5249, /* in i2c.h */
 254         .flags          = I2C_DF_NOTIFY,
 255         .attach_adapter = saa5249_probe,
 256         .detach_client  = saa5249_detach,
 257         .command        = saa5249_command
 258 };
 259
 260 static struct i2c_client client_template = {
 261         .id             = -1,
 262         .driver         = &i2c_driver_videotext,
 263         .name           = "(unset)",
 264 };
 265
 266 /*
 267  *      Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
 268  *      delay may be longer.
 269  */
 270
 271 static void jdelay(unsigned long delay)
 272 {
 273         sigset_t oldblocked = current->blocked;
 274
 275         spin_lock_irq(&current->sighand->siglock);
 276         sigfillset(&current->blocked);
 277         recalc_sigpending();
 278         spin_unlock_irq(&current->sighand->siglock);
 279         msleep_interruptible(jiffies_to_msecs(delay));
 280
 281         spin_lock_irq(&current->sighand->siglock);
 282         current->blocked = oldblocked;
 283         recalc_sigpending();
 284         spin_unlock_irq(&current->sighand->siglock);
 285 }
 286
 287
 288 /*
 289  *      I2C interfaces
 290  */
 291
 292 static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data)
 293 {
 294         char buf[64];
 295
 296         buf[0] = reg;
 297         memcpy(buf+1, data, count);
 298
 299         if(i2c_master_send(t->client, buf, count+1)==count+1)
 300                 return 0;
 301         return -1;
 302 }
 303
 304 static int i2c_senddata(struct saa5249_device *t, ...)
 305 {
 306         unsigned char buf[64];
 307         int v;
 308         int ct=0;
 309         va_list argp;
 310         va_start(argp,t);
 311
 312         while((v=va_arg(argp,int))!=-1)
 313                 buf[ct++]=v;
 314         return i2c_sendbuf(t, buf[0], ct-1, buf+1);
 315 }
 316
 317 /* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop
 318  * handshaking is done by this routine, ack will be sent after the last byte to inhibit further
 319  * sending of data. If uaccess is TRUE, data is written to user-space with put_user.
 320  * Returns -1 if I²C-device didn't send acknowledge, 0 otherwise
 321  */
 322
 323 static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf)
 324 {
 325         if(i2c_master_recv(t->client, buf, count)!=count)
 326                 return -1;
 327         return 0;
 328 }
 329
 330
 331 /*
 332  *      Standard character-device-driver functions
 333  */
 334
 335 static int do_saa5249_ioctl(struct inode *inode, struct file *file,
 336                             unsigned int cmd, void *arg)
 337 {
 338         static int virtual_mode = FALSE;
 339         struct video_device *vd = video_devdata(file);
 340         struct saa5249_device *t=vd->priv;
 341
 342         switch(cmd)
 343         {
 344                 case VTXIOCGETINFO:
 345                 {
 346                         vtx_info_t *info = arg;
 347                         info->version_major = VTX_VER_MAJ;
 348                         info->version_minor = VTX_VER_MIN;
 349                         info->numpages = NUM_DAUS;
 350                         /*info->cct_type = CCT_TYPE;*/
 351                         return 0;
 352                 }
 353
 354                 case VTXIOCCLRPAGE:
 355                 {
 356                         vtx_pagereq_t *req = arg;
 357
 358                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 359                                 return -EINVAL;
 360                         memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 361                         t->vdau[req->pgbuf].clrfound = TRUE;
 362                         return 0;
 363                 }
 364
 365                 case VTXIOCCLRFOUND:
 366                 {
 367                         vtx_pagereq_t *req = arg;
 368
 369                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 370                                 return -EINVAL;
 371                         t->vdau[req->pgbuf].clrfound = TRUE;
 372                         return 0;
 373                 }
 374
 375                 case VTXIOCPAGEREQ:
 376                 {
 377                         vtx_pagereq_t *req = arg;
 378                         if (!(req->pagemask & PGMASK_PAGE))
 379                                 req->page = 0;
 380                         if (!(req->pagemask & PGMASK_HOUR))
 381                                 req->hour = 0;
 382                         if (!(req->pagemask & PGMASK_MINUTE))
 383                                 req->minute = 0;
 384                         if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
 385                                 return -EINVAL;
 386                         req->page &= 0x7ff;
 387                         if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
 388                                 req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 389                                 return -EINVAL;
 390                         t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
 391                         t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
 392                         t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
 393                         t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
 394                         t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
 395                         t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
 396                         t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
 397                         t->vdau[req->pgbuf].stopped = FALSE;
 398                         t->vdau[req->pgbuf].clrfound = TRUE;
 399                         t->is_searching[req->pgbuf] = TRUE;
 400                         return 0;
 401                 }
 402
 403                 case VTXIOCGETSTAT:
 404                 {
 405                         vtx_pagereq_t *req = arg;
 406                         u8 infobits[10];
 407                         vtx_pageinfo_t info;
 408                         int a;
 409
 410                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 411                                 return -EINVAL;
 412                         if (!t->vdau[req->pgbuf].stopped)
 413                         {
 414                                 if (i2c_senddata(t, 2, 0, -1) ||
 415                                         i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
 416                                         i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
 417                                         i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
 418                                         i2c_senddata(t, 8, 0, 25, 0, -1))
 419                                         return -EIO;
 420                                 jdelay(PAGE_WAIT);
 421                                 if (i2c_getdata(t, 10, infobits))
 422                                         return -EIO;
 423
 424                                 if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) &&   /* check FOUND-bit */
 425                                         (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
 426                                         time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
 427                                 {               /* check if new page arrived */
 428                                         if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
 429                                                 i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
 430                                                 return -EIO;
 431                                         t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
 432                                         memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
 433                                         if (t->virtual_mode)
 434                                         {
 435                                                 /* Packet X/24 */
 436                                                 if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
 437                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
 438                                                         return -EIO;
 439                                                 /* Packet X/27/0 */
 440                                                 if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
 441                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
 442                                                         return -EIO;
 443                                                 /* Packet 8/30/0...8/30/15
 444                                                  * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
 445                                                  *        so we should undo this here.
 446                                                  */
 447                                                 if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
 448                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
 449                                                         return -EIO;
 450                                         }
 451                                         t->vdau[req->pgbuf].clrfound = FALSE;
 452                                         memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
 453                                 }
 454                                 else
 455                                 {
 456                                         memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
 457                                 }
 458                         }
 459                         else
 460                         {
 461                                 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
 462                         }
 463
 464                         info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
 465                         if (info.pagenum < 0x100)
 466                                 info.pagenum += 0x800;
 467                         info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
 468                         info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
 469                         info.charset = ((infobits[7] >> 1) & 7);
 470                         info.delete = !!(infobits[3] & 8);
 471                         info.headline = !!(infobits[5] & 4);
 472                         info.subtitle = !!(infobits[5] & 8);
 473                         info.supp_header = !!(infobits[6] & 1);
 474                         info.update = !!(infobits[6] & 2);
 475                         info.inter_seq = !!(infobits[6] & 4);
 476                         info.dis_disp = !!(infobits[6] & 8);
 477                         info.serial = !!(infobits[7] & 1);
 478                         info.notfound = !!(infobits[8] & 0x10);
 479                         info.pblf = !!(infobits[9] & 0x20);
 480                         info.hamming = 0;
 481                         for (a = 0; a <= 7; a++)
 482                         {
 483                                 if (infobits[a] & 0xf0)
 484                                 {
 485                                         info.hamming = 1;
 486                                         break;
 487                                 }
 488                         }
 489                         if (t->vdau[req->pgbuf].clrfound)
 490                                 info.notfound = 1;
 491                         if(copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
 492                                 return -EFAULT;
 493                         if (!info.hamming && !info.notfound)
 494                         {
 495                                 t->is_searching[req->pgbuf] = FALSE;
 496                         }
 497                         return 0;
 498                 }
 499
 500                 case VTXIOCGETPAGE:
 501                 {
 502                         vtx_pagereq_t *req = arg;
 503                         int start, end;
 504
 505                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
 506                                 req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
 507                                 return -EINVAL;
 508                         if(copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
 509                                 return -EFAULT;
 510
 511                          /*
 512                           *     Always read the time directly from SAA5249
 513                           */
 514
 515                         if (req->start <= 39 && req->end >= 32)
 516                         {
 517                                 int len;
 518                                 char buf[16];
 519                                 start = max(req->start, 32);
 520                                 end = min(req->end, 39);
 521                                 len=end-start+1;
 522                                 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
 523                                         i2c_getdata(t, len, buf))
 524                                         return -EIO;
 525                                 if(copy_to_user(req->buffer+start-req->start, buf, len))
 526                                         return -EFAULT;
 527                         }
 528                         /* Insert the current header if DAU is still searching for a page */
 529                         if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf])
 530                         {
 531                                 char buf[32];
 532                                 int len;
 533                                 start = max(req->start, 7);
 534                                 end = min(req->end, 31);
 535                                 len=end-start+1;
 536                                 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
 537                                         i2c_getdata(t, len, buf))
 538                                         return -EIO;
 539                                 if(copy_to_user(req->buffer+start-req->start, buf, len))
 540                                         return -EFAULT;
 541                         }
 542                         return 0;
 543                 }
 544
 545                 case VTXIOCSTOPDAU:
 546                 {
 547                         vtx_pagereq_t *req = arg;
 548
 549                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 550                                 return -EINVAL;
 551                         t->vdau[req->pgbuf].stopped = TRUE;
 552                         t->is_searching[req->pgbuf] = FALSE;
 553                         return 0;
 554                 }
 555
 556                 case VTXIOCPUTPAGE:
 557                 case VTXIOCSETDISP:
 558                 case VTXIOCPUTSTAT:
 559                         return 0;
 560
 561                 case VTXIOCCLRCACHE:
 562                 {
 563                         if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
 564                                 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',
 565                                 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ', -1))
 566                                 return -EIO;
 567                         if (i2c_senddata(t, 3, 0x20, -1))
 568                                 return -EIO;
 569                         jdelay(10 * CLEAR_DELAY);                       /* I have no idea how long we have to wait here */
 570                         return 0;
 571                 }
 572
 573                 case VTXIOCSETVIRT:
 574                 {
 575                         /* The SAA5249 has virtual-row reception turned on always */
 576                         t->virtual_mode = (int)(long)arg;
 577                         return 0;
 578                 }
 579         }
 580         return -EINVAL;
 581 }
 582
 583 /*
 584  * Translates old vtx IOCTLs to new ones
 585  *
 586  * This keeps new kernel versions compatible with old userspace programs.
 587  */
 588 static inline unsigned int vtx_fix_command(unsigned int cmd)
 589 {
 590         switch (cmd) {
 591         case VTXIOCGETINFO_OLD:
 592                 cmd = VTXIOCGETINFO;
 593                 break;
 594         case VTXIOCCLRPAGE_OLD:
 595                 cmd = VTXIOCCLRPAGE;
 596                 break;
 597         case VTXIOCCLRFOUND_OLD:
 598                 cmd = VTXIOCCLRFOUND;
 599                 break;
 600         case VTXIOCPAGEREQ_OLD:
 601                 cmd = VTXIOCPAGEREQ;
 602                 break;
 603         case VTXIOCGETSTAT_OLD:
 604                 cmd = VTXIOCGETSTAT;
 605                 break;
 606         case VTXIOCGETPAGE_OLD:
 607                 cmd = VTXIOCGETPAGE;
 608                 break;
 609         case VTXIOCSTOPDAU_OLD:
 610                 cmd = VTXIOCSTOPDAU;
 611                 break;
 612         case VTXIOCPUTPAGE_OLD:
 613                 cmd = VTXIOCPUTPAGE;
 614                 break;
 615         case VTXIOCSETDISP_OLD:
 616                 cmd = VTXIOCSETDISP;
 617                 break;
 618         case VTXIOCPUTSTAT_OLD:
 619                 cmd = VTXIOCPUTSTAT;
 620                 break;
 621         case VTXIOCCLRCACHE_OLD:
 622                 cmd = VTXIOCCLRCACHE;
 623                 break;
 624         case VTXIOCSETVIRT_OLD:
 625                 cmd = VTXIOCSETVIRT;
 626                 break;
 627         }
 628         return cmd;
 629 }
 630
 631 /*
 632  *      Handle the locking
 633  */
 634
 635 static int saa5249_ioctl(struct inode *inode, struct file *file,
 636                          unsigned int cmd, unsigned long arg)
 637 {
 638         struct video_device *vd = video_devdata(file);
 639         struct saa5249_device *t=vd->priv;
 640         int err;
 641
 642         cmd = vtx_fix_command(cmd);
 643         down(&t->lock);
 644         err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
 645         up(&t->lock);
 646         return err;
 647 }
 648
 649 static int saa5249_open(struct inode *inode, struct file *file)
 650 {
 651         struct video_device *vd = video_devdata(file);
 652         struct saa5249_device *t=vd->priv;
 653         int err,pgbuf;
 654
 655         err = video_exclusive_open(inode,file);
 656         if (err < 0)
 657                 return err;
 658
 659         if (t->client==NULL) {
 660                 err = -ENODEV;
 661                 goto fail;
 662         }
 663
 664         if (i2c_senddata(t, 0, 0, -1) ||                /* Select R11 */
 665                                                 /* Turn off parity checks (we do this ourselves) */
 666                 i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
 667                                                 /* Display TV-picture, no virtual rows */
 668                 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 */
 669
 670         {
 671                 err = -EIO;
 672                 goto fail;
 673         }
 674
 675         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
 676         {
 677                 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 678                 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
 679                 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
 680                 t->vdau[pgbuf].expire = 0;
 681                 t->vdau[pgbuf].clrfound = TRUE;
 682                 t->vdau[pgbuf].stopped = TRUE;
 683                 t->is_searching[pgbuf] = FALSE;
 684         }
 685         t->virtual_mode=FALSE;
 686         return 0;
 687
 688  fail:
 689         video_exclusive_release(inode,file);
 690         return err;
 691 }
 692
 693
 694
 695 static int saa5249_release(struct inode *inode, struct file *file)
 696 {
 697         struct video_device *vd = video_devdata(file);
 698         struct saa5249_device *t=vd->priv;
 699         i2c_senddata(t, 1, 0x20, -1);           /* Turn off CCT */
 700         i2c_senddata(t, 5, 3, 3, -1);           /* Turn off TV-display */
 701         video_exclusive_release(inode,file);
 702         return 0;
 703 }
 704
 705 static int __init init_saa_5249 (void)
 706 {
 707         printk(KERN_INFO "SAA5249 driver (" IF_NAME " interface) for VideoText version %d.%d\n",
 708                         VTX_VER_MAJ, VTX_VER_MIN);
 709         return i2c_add_driver(&i2c_driver_videotext);
 710 }
 711
 712 static void __exit cleanup_saa_5249 (void)
 713 {
 714         i2c_del_driver(&i2c_driver_videotext);
 715 }
 716
 717 module_init(init_saa_5249);
 718 module_exit(cleanup_saa_5249);
 719
 720 static struct file_operations saa_fops = {
 721         .owner          = THIS_MODULE,
 722         .open           = saa5249_open,
 723         .release        = saa5249_release,
 724         .ioctl          = saa5249_ioctl,
 725         .llseek         = no_llseek,
 726 };
 727
 728 static struct video_device saa_template =
 729 {
 730         .owner          = THIS_MODULE,
 731         .name           = IF_NAME,
 732         .type           = VID_TYPE_TELETEXT,    /*| VID_TYPE_TUNER ?? */
 733         .hardware       = VID_HARDWARE_SAA5249,
 734         .fops           = &saa_fops,
 735 };
 736
 737 MODULE_LICENSE("GPL");