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 I2C_CLIENT_INSMOD;
 137
 138 static struct i2c_client client_template;
 139
 140 static int saa5249_attach(struct i2c_adapter *adap, int addr, int kind)
 141 {
 142         int pgbuf;
 143         int err;
 144         struct i2c_client *client;
 145         struct video_device *vd;
 146         struct saa5249_device *t;
 147
 148         printk(KERN_INFO "saa5249: teletext chip found.\n");
 149         client=kmalloc(sizeof(*client), GFP_KERNEL);
 150         if(client==NULL)
 151                 return -ENOMEM;
 152         client_template.adapter = adap;
 153         client_template.addr = addr;
 154         memcpy(client, &client_template, sizeof(*client));
 155         t = kmalloc(sizeof(*t), GFP_KERNEL);
 156         if(t==NULL)
 157         {
 158                 kfree(client);
 159                 return -ENOMEM;
 160         }
 161         memset(t, 0, sizeof(*t));
 162         strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
 163         init_MUTEX(&t->lock);
 164
 165         /*
 166          *      Now create a video4linux device
 167          */
 168
 169         vd = (struct video_device *)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 static int saa5249_command(struct i2c_client *device,
 231                              unsigned int cmd, void *arg)
 232 {
 233         return -EINVAL;
 234 }
 235
 236 /* new I2C driver support */
 237
 238 static struct i2c_driver i2c_driver_videotext =
 239 {
 240         .owner          = THIS_MODULE,
 241         .name           = IF_NAME,              /* name */
 242         .id             = I2C_DRIVERID_SAA5249, /* in i2c.h */
 243         .flags          = I2C_DF_NOTIFY,
 244         .attach_adapter = saa5249_probe,
 245         .detach_client  = saa5249_detach,
 246         .command        = saa5249_command
 247 };
 248
 249 static struct i2c_client client_template = {
 250         .driver         = &i2c_driver_videotext,
 251         .name           = "(unset)",
 252 };
 253
 254 /*
 255  *      Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
 256  *      delay may be longer.
 257  */
 258
 259 static void jdelay(unsigned long delay)
 260 {
 261         sigset_t oldblocked = current->blocked;
 262
 263         spin_lock_irq(&current->sighand->siglock);
 264         sigfillset(&current->blocked);
 265         recalc_sigpending();
 266         spin_unlock_irq(&current->sighand->siglock);
 267         msleep_interruptible(jiffies_to_msecs(delay));
 268
 269         spin_lock_irq(&current->sighand->siglock);
 270         current->blocked = oldblocked;
 271         recalc_sigpending();
 272         spin_unlock_irq(&current->sighand->siglock);
 273 }
 274
 275
 276 /*
 277  *      I2C interfaces
 278  */
 279
 280 static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data)
 281 {
 282         char buf[64];
 283
 284         buf[0] = reg;
 285         memcpy(buf+1, data, count);
 286
 287         if(i2c_master_send(t->client, buf, count+1)==count+1)
 288                 return 0;
 289         return -1;
 290 }
 291
 292 static int i2c_senddata(struct saa5249_device *t, ...)
 293 {
 294         unsigned char buf[64];
 295         int v;
 296         int ct=0;
 297         va_list argp;
 298         va_start(argp,t);
 299
 300         while((v=va_arg(argp,int))!=-1)
 301                 buf[ct++]=v;
 302         return i2c_sendbuf(t, buf[0], ct-1, buf+1);
 303 }
 304
 305 /* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop
 306  * handshaking is done by this routine, ack will be sent after the last byte to inhibit further
 307  * sending of data. If uaccess is TRUE, data is written to user-space with put_user.
 308  * Returns -1 if I²C-device didn't send acknowledge, 0 otherwise
 309  */
 310
 311 static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf)
 312 {
 313         if(i2c_master_recv(t->client, buf, count)!=count)
 314                 return -1;
 315         return 0;
 316 }
 317
 318
 319 /*
 320  *      Standard character-device-driver functions
 321  */
 322
 323 static int do_saa5249_ioctl(struct inode *inode, struct file *file,
 324                             unsigned int cmd, void *arg)
 325 {
 326         static int virtual_mode = FALSE;
 327         struct video_device *vd = video_devdata(file);
 328         struct saa5249_device *t=vd->priv;
 329
 330         switch(cmd)
 331         {
 332                 case VTXIOCGETINFO:
 333                 {
 334                         vtx_info_t *info = arg;
 335                         info->version_major = VTX_VER_MAJ;
 336                         info->version_minor = VTX_VER_MIN;
 337                         info->numpages = NUM_DAUS;
 338                         /*info->cct_type = CCT_TYPE;*/
 339                         return 0;
 340                 }
 341
 342                 case VTXIOCCLRPAGE:
 343                 {
 344                         vtx_pagereq_t *req = arg;
 345
 346                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 347                                 return -EINVAL;
 348                         memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 349                         t->vdau[req->pgbuf].clrfound = TRUE;
 350                         return 0;
 351                 }
 352
 353                 case VTXIOCCLRFOUND:
 354                 {
 355                         vtx_pagereq_t *req = arg;
 356
 357                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 358                                 return -EINVAL;
 359                         t->vdau[req->pgbuf].clrfound = TRUE;
 360                         return 0;
 361                 }
 362
 363                 case VTXIOCPAGEREQ:
 364                 {
 365                         vtx_pagereq_t *req = arg;
 366                         if (!(req->pagemask & PGMASK_PAGE))
 367                                 req->page = 0;
 368                         if (!(req->pagemask & PGMASK_HOUR))
 369                                 req->hour = 0;
 370                         if (!(req->pagemask & PGMASK_MINUTE))
 371                                 req->minute = 0;
 372                         if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
 373                                 return -EINVAL;
 374                         req->page &= 0x7ff;
 375                         if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
 376                                 req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 377                                 return -EINVAL;
 378                         t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
 379                         t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
 380                         t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
 381                         t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
 382                         t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
 383                         t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
 384                         t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
 385                         t->vdau[req->pgbuf].stopped = FALSE;
 386                         t->vdau[req->pgbuf].clrfound = TRUE;
 387                         t->is_searching[req->pgbuf] = TRUE;
 388                         return 0;
 389                 }
 390
 391                 case VTXIOCGETSTAT:
 392                 {
 393                         vtx_pagereq_t *req = arg;
 394                         u8 infobits[10];
 395                         vtx_pageinfo_t info;
 396                         int a;
 397
 398                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 399                                 return -EINVAL;
 400                         if (!t->vdau[req->pgbuf].stopped)
 401                         {
 402                                 if (i2c_senddata(t, 2, 0, -1) ||
 403                                         i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
 404                                         i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
 405                                         i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
 406                                         i2c_senddata(t, 8, 0, 25, 0, -1))
 407                                         return -EIO;
 408                                 jdelay(PAGE_WAIT);
 409                                 if (i2c_getdata(t, 10, infobits))
 410                                         return -EIO;
 411
 412                                 if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) &&   /* check FOUND-bit */
 413                                         (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
 414                                         time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
 415                                 {               /* check if new page arrived */
 416                                         if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
 417                                                 i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
 418                                                 return -EIO;
 419                                         t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
 420                                         memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
 421                                         if (t->virtual_mode)
 422                                         {
 423                                                 /* Packet X/24 */
 424                                                 if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
 425                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
 426                                                         return -EIO;
 427                                                 /* Packet X/27/0 */
 428                                                 if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
 429                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
 430                                                         return -EIO;
 431                                                 /* Packet 8/30/0...8/30/15
 432                                                  * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
 433                                                  *        so we should undo this here.
 434                                                  */
 435                                                 if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
 436                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
 437                                                         return -EIO;
 438                                         }
 439                                         t->vdau[req->pgbuf].clrfound = FALSE;
 440                                         memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
 441                                 }
 442                                 else
 443                                 {
 444                                         memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
 445                                 }
 446                         }
 447                         else
 448                         {
 449                                 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
 450                         }
 451
 452                         info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
 453                         if (info.pagenum < 0x100)
 454                                 info.pagenum += 0x800;
 455                         info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
 456                         info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
 457                         info.charset = ((infobits[7] >> 1) & 7);
 458                         info.delete = !!(infobits[3] & 8);
 459                         info.headline = !!(infobits[5] & 4);
 460                         info.subtitle = !!(infobits[5] & 8);
 461                         info.supp_header = !!(infobits[6] & 1);
 462                         info.update = !!(infobits[6] & 2);
 463                         info.inter_seq = !!(infobits[6] & 4);
 464                         info.dis_disp = !!(infobits[6] & 8);
 465                         info.serial = !!(infobits[7] & 1);
 466                         info.notfound = !!(infobits[8] & 0x10);
 467                         info.pblf = !!(infobits[9] & 0x20);
 468                         info.hamming = 0;
 469                         for (a = 0; a <= 7; a++)
 470                         {
 471                                 if (infobits[a] & 0xf0)
 472                                 {
 473                                         info.hamming = 1;
 474                                         break;
 475                                 }
 476                         }
 477                         if (t->vdau[req->pgbuf].clrfound)
 478                                 info.notfound = 1;
 479                         if(copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
 480                                 return -EFAULT;
 481                         if (!info.hamming && !info.notfound)
 482                         {
 483                                 t->is_searching[req->pgbuf] = FALSE;
 484                         }
 485                         return 0;
 486                 }
 487
 488                 case VTXIOCGETPAGE:
 489                 {
 490                         vtx_pagereq_t *req = arg;
 491                         int start, end;
 492
 493                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
 494                                 req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
 495                                 return -EINVAL;
 496                         if(copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
 497                                 return -EFAULT;
 498
 499                          /*
 500                           *     Always read the time directly from SAA5249
 501                           */
 502
 503                         if (req->start <= 39 && req->end >= 32)
 504                         {
 505                                 int len;
 506                                 char buf[16];
 507                                 start = max(req->start, 32);
 508                                 end = min(req->end, 39);
 509                                 len=end-start+1;
 510                                 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
 511                                         i2c_getdata(t, len, buf))
 512                                         return -EIO;
 513                                 if(copy_to_user(req->buffer+start-req->start, buf, len))
 514                                         return -EFAULT;
 515                         }
 516                         /* Insert the current header if DAU is still searching for a page */
 517                         if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf])
 518                         {
 519                                 char buf[32];
 520                                 int len;
 521                                 start = max(req->start, 7);
 522                                 end = min(req->end, 31);
 523                                 len=end-start+1;
 524                                 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
 525                                         i2c_getdata(t, len, buf))
 526                                         return -EIO;
 527                                 if(copy_to_user(req->buffer+start-req->start, buf, len))
 528                                         return -EFAULT;
 529                         }
 530                         return 0;
 531                 }
 532
 533                 case VTXIOCSTOPDAU:
 534                 {
 535                         vtx_pagereq_t *req = arg;
 536
 537                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
 538                                 return -EINVAL;
 539                         t->vdau[req->pgbuf].stopped = TRUE;
 540                         t->is_searching[req->pgbuf] = FALSE;
 541                         return 0;
 542                 }
 543
 544                 case VTXIOCPUTPAGE:
 545                 case VTXIOCSETDISP:
 546                 case VTXIOCPUTSTAT:
 547                         return 0;
 548
 549                 case VTXIOCCLRCACHE:
 550                 {
 551                         if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
 552                                 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',
 553                                 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ', -1))
 554                                 return -EIO;
 555                         if (i2c_senddata(t, 3, 0x20, -1))
 556                                 return -EIO;
 557                         jdelay(10 * CLEAR_DELAY);                       /* I have no idea how long we have to wait here */
 558                         return 0;
 559                 }
 560
 561                 case VTXIOCSETVIRT:
 562                 {
 563                         /* The SAA5249 has virtual-row reception turned on always */
 564                         t->virtual_mode = (int)(long)arg;
 565                         return 0;
 566                 }
 567         }
 568         return -EINVAL;
 569 }
 570
 571 /*
 572  * Translates old vtx IOCTLs to new ones
 573  *
 574  * This keeps new kernel versions compatible with old userspace programs.
 575  */
 576 static inline unsigned int vtx_fix_command(unsigned int cmd)
 577 {
 578         switch (cmd) {
 579         case VTXIOCGETINFO_OLD:
 580                 cmd = VTXIOCGETINFO;
 581                 break;
 582         case VTXIOCCLRPAGE_OLD:
 583                 cmd = VTXIOCCLRPAGE;
 584                 break;
 585         case VTXIOCCLRFOUND_OLD:
 586                 cmd = VTXIOCCLRFOUND;
 587                 break;
 588         case VTXIOCPAGEREQ_OLD:
 589                 cmd = VTXIOCPAGEREQ;
 590                 break;
 591         case VTXIOCGETSTAT_OLD:
 592                 cmd = VTXIOCGETSTAT;
 593                 break;
 594         case VTXIOCGETPAGE_OLD:
 595                 cmd = VTXIOCGETPAGE;
 596                 break;
 597         case VTXIOCSTOPDAU_OLD:
 598                 cmd = VTXIOCSTOPDAU;
 599                 break;
 600         case VTXIOCPUTPAGE_OLD:
 601                 cmd = VTXIOCPUTPAGE;
 602                 break;
 603         case VTXIOCSETDISP_OLD:
 604                 cmd = VTXIOCSETDISP;
 605                 break;
 606         case VTXIOCPUTSTAT_OLD:
 607                 cmd = VTXIOCPUTSTAT;
 608                 break;
 609         case VTXIOCCLRCACHE_OLD:
 610                 cmd = VTXIOCCLRCACHE;
 611                 break;
 612         case VTXIOCSETVIRT_OLD:
 613                 cmd = VTXIOCSETVIRT;
 614                 break;
 615         }
 616         return cmd;
 617 }
 618
 619 /*
 620  *      Handle the locking
 621  */
 622
 623 static int saa5249_ioctl(struct inode *inode, struct file *file,
 624                          unsigned int cmd, unsigned long arg)
 625 {
 626         struct video_device *vd = video_devdata(file);
 627         struct saa5249_device *t=vd->priv;
 628         int err;
 629
 630         cmd = vtx_fix_command(cmd);
 631         down(&t->lock);
 632         err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
 633         up(&t->lock);
 634         return err;
 635 }
 636
 637 static int saa5249_open(struct inode *inode, struct file *file)
 638 {
 639         struct video_device *vd = video_devdata(file);
 640         struct saa5249_device *t=vd->priv;
 641         int err,pgbuf;
 642
 643         err = video_exclusive_open(inode,file);
 644         if (err < 0)
 645                 return err;
 646
 647         if (t->client==NULL) {
 648                 err = -ENODEV;
 649                 goto fail;
 650         }
 651
 652         if (i2c_senddata(t, 0, 0, -1) ||                /* Select R11 */
 653                                                 /* Turn off parity checks (we do this ourselves) */
 654                 i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
 655                                                 /* Display TV-picture, no virtual rows */
 656                 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 */
 657
 658         {
 659                 err = -EIO;
 660                 goto fail;
 661         }
 662
 663         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
 664         {
 665                 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
 666                 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
 667                 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
 668                 t->vdau[pgbuf].expire = 0;
 669                 t->vdau[pgbuf].clrfound = TRUE;
 670                 t->vdau[pgbuf].stopped = TRUE;
 671                 t->is_searching[pgbuf] = FALSE;
 672         }
 673         t->virtual_mode=FALSE;
 674         return 0;
 675
 676  fail:
 677         video_exclusive_release(inode,file);
 678         return err;
 679 }
 680
 681
 682
 683 static int saa5249_release(struct inode *inode, struct file *file)
 684 {
 685         struct video_device *vd = video_devdata(file);
 686         struct saa5249_device *t=vd->priv;
 687         i2c_senddata(t, 1, 0x20, -1);           /* Turn off CCT */
 688         i2c_senddata(t, 5, 3, 3, -1);           /* Turn off TV-display */
 689         video_exclusive_release(inode,file);
 690         return 0;
 691 }
 692
 693 static int __init init_saa_5249 (void)
 694 {
 695         printk(KERN_INFO "SAA5249 driver (" IF_NAME " interface) for VideoText version %d.%d\n",
 696                         VTX_VER_MAJ, VTX_VER_MIN);
 697         return i2c_add_driver(&i2c_driver_videotext);
 698 }
 699
 700 static void __exit cleanup_saa_5249 (void)
 701 {
 702         i2c_del_driver(&i2c_driver_videotext);
 703 }
 704
 705 module_init(init_saa_5249);
 706 module_exit(cleanup_saa_5249);
 707
 708 static struct file_operations saa_fops = {
 709         .owner          = THIS_MODULE,
 710         .open           = saa5249_open,
 711         .release        = saa5249_release,
 712         .ioctl          = saa5249_ioctl,
 713         .llseek         = no_llseek,
 714 };
 715
 716 static struct video_device saa_template =
 717 {
 718         .owner          = THIS_MODULE,
 719         .name           = IF_NAME,
 720         .type           = VID_TYPE_TELETEXT,    /*| VID_TYPE_TUNER ?? */
 721         .hardware       = VID_HARDWARE_SAA5249,
 722         .fops           = &saa_fops,
 723 };
 724
 725 MODULE_LICENSE("GPL");