Merge branch 'for-2.6.24' of master.kernel.org:/pub/scm/linux/kernel/git/jwboyer...
[linux-2.6] / drivers / media / video / saa5246a.c
1 /*
2  * Driver for the SAA5246A or SAA5281 Teletext (=Videotext) decoder chips from
3  * Philips.
4  *
5  * Only capturing of Teletext pages is tested. The videotext chips also have a
6  * TV output but my hardware doesn't use it. For this reason this driver does
7  * not support changing any TV display settings.
8  *
9  * Copyright (C) 2004 Michael Geng <linux@MichaelGeng.de>
10  *
11  * Derived from
12  *
13  * saa5249 driver
14  * Copyright (C) 1998 Richard Guenther
15  * <richard.guenther@student.uni-tuebingen.de>
16  *
17  * with changes by
18  * Alan Cox <Alan.Cox@linux.org>
19  *
20  * and
21  *
22  * vtx.c
23  * Copyright (C) 1994-97 Martin Buck  <martin-2.buck@student.uni-ulm.de>
24  *
25  * This program is free software; you can redistribute it and/or modify
26  * it under the terms of the GNU General Public License as published by
27  * the Free Software Foundation; either version 2 of the License, or
28  * (at your option) any later version.
29  *
30  * This program is distributed in the hope that it will be useful,
31  * but WITHOUT ANY WARRANTY; without even the implied warranty of
32  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
33  * GNU General Public License for more details.
34  *
35  * You should have received a copy of the GNU General Public License
36  * along with this program; if not, write to the Free Software
37  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
38  * USA.
39  */
40
41 #include <linux/module.h>
42 #include <linux/kernel.h>
43 #include <linux/mm.h>
44 #include <linux/init.h>
45 #include <linux/i2c.h>
46 #include <linux/videotext.h>
47 #include <linux/videodev.h>
48 #include <media/v4l2-common.h>
49 #include <linux/mutex.h>
50
51 #include "saa5246a.h"
52
53 MODULE_AUTHOR("Michael Geng <linux@MichaelGeng.de>");
54 MODULE_DESCRIPTION("Philips SAA5246A, SAA5281 Teletext decoder driver");
55 MODULE_LICENSE("GPL");
56
57 struct saa5246a_device
58 {
59         u8     pgbuf[NUM_DAUS][VTX_VIRTUALSIZE];
60         int    is_searching[NUM_DAUS];
61         struct i2c_client *client;
62         struct mutex lock;
63 };
64
65 static struct video_device saa_template;        /* Declared near bottom */
66
67 /* Addresses to scan */
68 static unsigned short normal_i2c[]       = { I2C_ADDRESS, I2C_CLIENT_END };
69 I2C_CLIENT_INSMOD;
70
71 static struct i2c_client client_template;
72
73 static int saa5246a_attach(struct i2c_adapter *adap, int addr, int kind)
74 {
75         int pgbuf;
76         int err;
77         struct i2c_client *client;
78         struct video_device *vd;
79         struct saa5246a_device *t;
80
81         printk(KERN_INFO "saa5246a: teletext chip found.\n");
82         client=kmalloc(sizeof(*client), GFP_KERNEL);
83         if(client==NULL)
84                 return -ENOMEM;
85         client_template.adapter = adap;
86         client_template.addr = addr;
87         memcpy(client, &client_template, sizeof(*client));
88         t = kzalloc(sizeof(*t), GFP_KERNEL);
89         if(t==NULL)
90         {
91                 kfree(client);
92                 return -ENOMEM;
93         }
94         strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
95         mutex_init(&t->lock);
96
97         /*
98          *      Now create a video4linux device
99          */
100
101         vd = video_device_alloc();
102         if(vd==NULL)
103         {
104                 kfree(t);
105                 kfree(client);
106                 return -ENOMEM;
107         }
108         i2c_set_clientdata(client, vd);
109         memcpy(vd, &saa_template, sizeof(*vd));
110
111         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
112         {
113                 memset(t->pgbuf[pgbuf], ' ', sizeof(t->pgbuf[0]));
114                 t->is_searching[pgbuf] = false;
115         }
116         vd->priv=t;
117
118
119         /*
120          *      Register it
121          */
122
123         if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
124         {
125                 kfree(t);
126                 kfree(client);
127                 video_device_release(vd);
128                 return err;
129         }
130         t->client = client;
131         i2c_attach_client(client);
132         return 0;
133 }
134
135 /*
136  *      We do most of the hard work when we become a device on the i2c.
137  */
138 static int saa5246a_probe(struct i2c_adapter *adap)
139 {
140         if (adap->class & I2C_CLASS_TV_ANALOG)
141                 return i2c_probe(adap, &addr_data, saa5246a_attach);
142         return 0;
143 }
144
145 static int saa5246a_detach(struct i2c_client *client)
146 {
147         struct video_device *vd = i2c_get_clientdata(client);
148         i2c_detach_client(client);
149         video_unregister_device(vd);
150         kfree(vd->priv);
151         kfree(client);
152         return 0;
153 }
154
155 /*
156  *      I2C interfaces
157  */
158
159 static struct i2c_driver i2c_driver_videotext =
160 {
161         .driver = {
162                 .name   = IF_NAME,              /* name */
163         },
164         .id             = I2C_DRIVERID_SAA5249, /* in i2c.h */
165         .attach_adapter = saa5246a_probe,
166         .detach_client  = saa5246a_detach,
167 };
168
169 static struct i2c_client client_template = {
170         .driver         = &i2c_driver_videotext,
171         .name           = "(unset)",
172 };
173
174 static int i2c_sendbuf(struct saa5246a_device *t, int reg, int count, u8 *data)
175 {
176         char buf[64];
177
178         buf[0] = reg;
179         memcpy(buf+1, data, count);
180
181         if(i2c_master_send(t->client, buf, count+1)==count+1)
182                 return 0;
183         return -1;
184 }
185
186 static int i2c_senddata(struct saa5246a_device *t, ...)
187 {
188         unsigned char buf[64];
189         int v;
190         int ct=0;
191         va_list argp;
192         va_start(argp,t);
193
194         while((v=va_arg(argp,int))!=-1)
195                 buf[ct++]=v;
196         return i2c_sendbuf(t, buf[0], ct-1, buf+1);
197 }
198
199 /* Get count number of bytes from I²C-device at address adr, store them in buf.
200  * Start & stop handshaking is done by this routine, ack will be sent after the
201  * last byte to inhibit further sending of data. If uaccess is 'true', data is
202  * written to user-space with put_user. Returns -1 if I²C-device didn't send
203  * acknowledge, 0 otherwise
204  */
205 static int i2c_getdata(struct saa5246a_device *t, int count, u8 *buf)
206 {
207         if(i2c_master_recv(t->client, buf, count)!=count)
208                 return -1;
209         return 0;
210 }
211
212 /* When a page is found then the not FOUND bit in one of the status registers
213  * of the SAA5264A chip is cleared. Unfortunately this bit is not set
214  * automatically when a new page is requested. Instead this function must be
215  * called after a page has been requested.
216  *
217  * Return value: 0 if successful
218  */
219 static int saa5246a_clear_found_bit(struct saa5246a_device *t,
220         unsigned char dau_no)
221 {
222         unsigned char row_25_column_8;
223
224         if (i2c_senddata(t, SAA5246A_REGISTER_R8,
225
226                 dau_no |
227                 R8_DO_NOT_CLEAR_MEMORY,
228
229                 R9_CURSER_ROW_25,
230
231                 R10_CURSER_COLUMN_8,
232
233                 COMMAND_END) ||
234                 i2c_getdata(t, 1, &row_25_column_8))
235         {
236                 return -EIO;
237         }
238         row_25_column_8 |= ROW25_COLUMN8_PAGE_NOT_FOUND;
239         if (i2c_senddata(t, SAA5246A_REGISTER_R8,
240
241                 dau_no |
242                 R8_DO_NOT_CLEAR_MEMORY,
243
244                 R9_CURSER_ROW_25,
245
246                 R10_CURSER_COLUMN_8,
247
248                 row_25_column_8,
249
250                 COMMAND_END))
251         {
252                 return -EIO;
253         }
254
255         return 0;
256 }
257
258 /* Requests one videotext page as described in req. The fields of req are
259  * checked and an error is returned if something is invalid.
260  *
261  * Return value: 0 if successful
262  */
263 static int saa5246a_request_page(struct saa5246a_device *t,
264     vtx_pagereq_t *req)
265 {
266         if (req->pagemask < 0 || req->pagemask >= PGMASK_MAX)
267                 return -EINVAL;
268         if (req->pagemask & PGMASK_PAGE)
269                 if (req->page < 0 || req->page > PAGE_MAX)
270                         return -EINVAL;
271         if (req->pagemask & PGMASK_HOUR)
272                 if (req->hour < 0 || req->hour > HOUR_MAX)
273                         return -EINVAL;
274         if (req->pagemask & PGMASK_MINUTE)
275                 if (req->minute < 0 || req->minute > MINUTE_MAX)
276                         return -EINVAL;
277         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
278                 return -EINVAL;
279
280         if (i2c_senddata(t, SAA5246A_REGISTER_R2,
281
282                 R2_IN_R3_SELECT_PAGE_HUNDREDS |
283                 req->pgbuf << 4 |
284                 R2_BANK_0 |
285                 R2_HAMMING_CHECK_OFF,
286
287                 HUNDREDS_OF_PAGE(req->page) |
288                 R3_HOLD_PAGE |
289                 (req->pagemask & PG_HUND ?
290                         R3_PAGE_HUNDREDS_DO_CARE :
291                         R3_PAGE_HUNDREDS_DO_NOT_CARE),
292
293                 TENS_OF_PAGE(req->page) |
294                 (req->pagemask & PG_TEN ?
295                         R3_PAGE_TENS_DO_CARE :
296                         R3_PAGE_TENS_DO_NOT_CARE),
297
298                 UNITS_OF_PAGE(req->page) |
299                 (req->pagemask & PG_UNIT ?
300                         R3_PAGE_UNITS_DO_CARE :
301                         R3_PAGE_UNITS_DO_NOT_CARE),
302
303                 TENS_OF_HOUR(req->hour) |
304                 (req->pagemask & HR_TEN ?
305                         R3_HOURS_TENS_DO_CARE :
306                         R3_HOURS_TENS_DO_NOT_CARE),
307
308                 UNITS_OF_HOUR(req->hour) |
309                 (req->pagemask & HR_UNIT ?
310                         R3_HOURS_UNITS_DO_CARE :
311                         R3_HOURS_UNITS_DO_NOT_CARE),
312
313                 TENS_OF_MINUTE(req->minute) |
314                 (req->pagemask & MIN_TEN ?
315                         R3_MINUTES_TENS_DO_CARE :
316                         R3_MINUTES_TENS_DO_NOT_CARE),
317
318                 UNITS_OF_MINUTE(req->minute) |
319                 (req->pagemask & MIN_UNIT ?
320                         R3_MINUTES_UNITS_DO_CARE :
321                         R3_MINUTES_UNITS_DO_NOT_CARE),
322
323                 COMMAND_END) || i2c_senddata(t, SAA5246A_REGISTER_R2,
324
325                 R2_IN_R3_SELECT_PAGE_HUNDREDS |
326                 req->pgbuf << 4 |
327                 R2_BANK_0 |
328                 R2_HAMMING_CHECK_OFF,
329
330                 HUNDREDS_OF_PAGE(req->page) |
331                 R3_UPDATE_PAGE |
332                 (req->pagemask & PG_HUND ?
333                         R3_PAGE_HUNDREDS_DO_CARE :
334                         R3_PAGE_HUNDREDS_DO_NOT_CARE),
335
336                 COMMAND_END))
337         {
338                 return -EIO;
339         }
340
341         t->is_searching[req->pgbuf] = true;
342         return 0;
343 }
344
345 /* This routine decodes the page number from the infobits contained in line 25.
346  *
347  * Parameters:
348  * infobits: must be bits 0 to 9 of column 25
349  *
350  * Return value: page number coded in hexadecimal, i. e. page 123 is coded 0x123
351  */
352 static inline int saa5246a_extract_pagenum_from_infobits(
353     unsigned char infobits[10])
354 {
355         int page_hundreds, page_tens, page_units;
356
357         page_units    = infobits[0] & ROW25_COLUMN0_PAGE_UNITS;
358         page_tens     = infobits[1] & ROW25_COLUMN1_PAGE_TENS;
359         page_hundreds = infobits[8] & ROW25_COLUMN8_PAGE_HUNDREDS;
360
361         /* page 0x.. means page 8.. */
362         if (page_hundreds == 0)
363                 page_hundreds = 8;
364
365         return((page_hundreds << 8) | (page_tens << 4) | page_units);
366 }
367
368 /* Decodes the hour from the infobits contained in line 25.
369  *
370  * Parameters:
371  * infobits: must be bits 0 to 9 of column 25
372  *
373  * Return: hour coded in hexadecimal, i. e. 12h is coded 0x12
374  */
375 static inline int saa5246a_extract_hour_from_infobits(
376     unsigned char infobits[10])
377 {
378         int hour_tens, hour_units;
379
380         hour_units = infobits[4] & ROW25_COLUMN4_HOUR_UNITS;
381         hour_tens  = infobits[5] & ROW25_COLUMN5_HOUR_TENS;
382
383         return((hour_tens << 4) | hour_units);
384 }
385
386 /* Decodes the minutes from the infobits contained in line 25.
387  *
388  * Parameters:
389  * infobits: must be bits 0 to 9 of column 25
390  *
391  * Return: minutes coded in hexadecimal, i. e. 10min is coded 0x10
392  */
393 static inline int saa5246a_extract_minutes_from_infobits(
394     unsigned char infobits[10])
395 {
396         int minutes_tens, minutes_units;
397
398         minutes_units = infobits[2] & ROW25_COLUMN2_MINUTES_UNITS;
399         minutes_tens  = infobits[3] & ROW25_COLUMN3_MINUTES_TENS;
400
401         return((minutes_tens << 4) | minutes_units);
402 }
403
404 /* Reads the status bits contained in the first 10 columns of the first line
405  * and extracts the information into info.
406  *
407  * Return value: 0 if successful
408  */
409 static inline int saa5246a_get_status(struct saa5246a_device *t,
410     vtx_pageinfo_t *info, unsigned char dau_no)
411 {
412         unsigned char infobits[10];
413         int column;
414
415         if (dau_no >= NUM_DAUS)
416                 return -EINVAL;
417
418         if (i2c_senddata(t, SAA5246A_REGISTER_R8,
419
420                 dau_no |
421                 R8_DO_NOT_CLEAR_MEMORY,
422
423                 R9_CURSER_ROW_25,
424
425                 R10_CURSER_COLUMN_0,
426
427                 COMMAND_END) ||
428                 i2c_getdata(t, 10, infobits))
429         {
430                 return -EIO;
431         }
432
433         info->pagenum = saa5246a_extract_pagenum_from_infobits(infobits);
434         info->hour    = saa5246a_extract_hour_from_infobits(infobits);
435         info->minute  = saa5246a_extract_minutes_from_infobits(infobits);
436         info->charset = ((infobits[7] & ROW25_COLUMN7_CHARACTER_SET) >> 1);
437         info->delete = !!(infobits[3] & ROW25_COLUMN3_DELETE_PAGE);
438         info->headline = !!(infobits[5] & ROW25_COLUMN5_INSERT_HEADLINE);
439         info->subtitle = !!(infobits[5] & ROW25_COLUMN5_INSERT_SUBTITLE);
440         info->supp_header = !!(infobits[6] & ROW25_COLUMN6_SUPPRESS_HEADER);
441         info->update = !!(infobits[6] & ROW25_COLUMN6_UPDATE_PAGE);
442         info->inter_seq = !!(infobits[6] & ROW25_COLUMN6_INTERRUPTED_SEQUENCE);
443         info->dis_disp = !!(infobits[6] & ROW25_COLUMN6_SUPPRESS_DISPLAY);
444         info->serial = !!(infobits[7] & ROW25_COLUMN7_SERIAL_MODE);
445         info->notfound = !!(infobits[8] & ROW25_COLUMN8_PAGE_NOT_FOUND);
446         info->pblf = !!(infobits[9] & ROW25_COLUMN9_PAGE_BEING_LOOKED_FOR);
447         info->hamming = 0;
448         for (column = 0; column <= 7; column++) {
449                 if (infobits[column] & ROW25_COLUMN0_TO_7_HAMMING_ERROR) {
450                         info->hamming = 1;
451                         break;
452                 }
453         }
454         if (!info->hamming && !info->notfound)
455                 t->is_searching[dau_no] = false;
456         return 0;
457 }
458
459 /* Reads 1 videotext page buffer of the SAA5246A.
460  *
461  * req is used both as input and as output. It contains information which part
462  * must be read. The videotext page is copied into req->buffer.
463  *
464  * Return value: 0 if successful
465  */
466 static inline int saa5246a_get_page(struct saa5246a_device *t,
467         vtx_pagereq_t *req)
468 {
469         int start, end, size;
470         char *buf;
471         int err;
472
473         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS ||
474             req->start < 0 || req->start > req->end || req->end >= VTX_PAGESIZE)
475                 return -EINVAL;
476
477         buf = kmalloc(VTX_PAGESIZE, GFP_KERNEL);
478         if (!buf)
479                 return -ENOMEM;
480
481         /* Read "normal" part of page */
482         err = -EIO;
483
484         end = min(req->end, VTX_PAGESIZE - 1);
485         if (i2c_senddata(t, SAA5246A_REGISTER_R8,
486                         req->pgbuf | R8_DO_NOT_CLEAR_MEMORY,
487                         ROW(req->start), COLUMN(req->start), COMMAND_END))
488                 goto out;
489         if (i2c_getdata(t, end - req->start + 1, buf))
490                 goto out;
491         err = -EFAULT;
492         if (copy_to_user(req->buffer, buf, end - req->start + 1))
493                 goto out;
494
495         /* Always get the time from buffer 4, since this stupid SAA5246A only
496          * updates the currently displayed buffer...
497          */
498         if (REQ_CONTAINS_TIME(req)) {
499                 start = max(req->start, POS_TIME_START);
500                 end   = min(req->end,   POS_TIME_END);
501                 size = end - start + 1;
502                 err = -EINVAL;
503                 if (size < 0)
504                         goto out;
505                 err = -EIO;
506                 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
507                                 R8_ACTIVE_CHAPTER_4 | R8_DO_NOT_CLEAR_MEMORY,
508                                 R9_CURSER_ROW_0, start, COMMAND_END))
509                         goto out;
510                 if (i2c_getdata(t, size, buf))
511                         goto out;
512                 err = -EFAULT;
513                 if (copy_to_user(req->buffer + start - req->start, buf, size))
514                         goto out;
515         }
516         /* Insert the header from buffer 4 only, if acquisition circuit is still searching for a page */
517         if (REQ_CONTAINS_HEADER(req) && t->is_searching[req->pgbuf]) {
518                 start = max(req->start, POS_HEADER_START);
519                 end   = min(req->end,   POS_HEADER_END);
520                 size = end - start + 1;
521                 err = -EINVAL;
522                 if (size < 0)
523                         goto out;
524                 err = -EIO;
525                 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
526                                 R8_ACTIVE_CHAPTER_4 | R8_DO_NOT_CLEAR_MEMORY,
527                                 R9_CURSER_ROW_0, start, COMMAND_END))
528                         goto out;
529                 if (i2c_getdata(t, end - start + 1, buf))
530                         goto out;
531                 err = -EFAULT;
532                 if (copy_to_user(req->buffer + start - req->start, buf, size))
533                         goto out;
534         }
535         err = 0;
536 out:
537         kfree(buf);
538         return err;
539 }
540
541 /* Stops the acquisition circuit given in dau_no. The page buffer associated
542  * with this acquisition circuit will no more be updated. The other daus are
543  * not affected.
544  *
545  * Return value: 0 if successful
546  */
547 static inline int saa5246a_stop_dau(struct saa5246a_device *t,
548     unsigned char dau_no)
549 {
550         if (dau_no >= NUM_DAUS)
551                 return -EINVAL;
552         if (i2c_senddata(t, SAA5246A_REGISTER_R2,
553
554                 R2_IN_R3_SELECT_PAGE_HUNDREDS |
555                 dau_no << 4 |
556                 R2_BANK_0 |
557                 R2_HAMMING_CHECK_OFF,
558
559                 R3_PAGE_HUNDREDS_0 |
560                 R3_HOLD_PAGE |
561                 R3_PAGE_HUNDREDS_DO_NOT_CARE,
562
563                 COMMAND_END))
564         {
565                 return -EIO;
566         }
567         t->is_searching[dau_no] = false;
568         return 0;
569 }
570
571 /*  Handles ioctls defined in videotext.h
572  *
573  *  Returns 0 if successful
574  */
575 static int do_saa5246a_ioctl(struct inode *inode, struct file *file,
576                             unsigned int cmd, void *arg)
577 {
578         struct video_device *vd = video_devdata(file);
579         struct saa5246a_device *t=vd->priv;
580         switch(cmd)
581         {
582                 case VTXIOCGETINFO:
583                 {
584                         vtx_info_t *info = arg;
585
586                         info->version_major = MAJOR_VERSION;
587                         info->version_minor = MINOR_VERSION;
588                         info->numpages = NUM_DAUS;
589                         return 0;
590                 }
591
592                 case VTXIOCCLRPAGE:
593                 {
594                         vtx_pagereq_t *req = arg;
595
596                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
597                                 return -EINVAL;
598                         memset(t->pgbuf[req->pgbuf], ' ', sizeof(t->pgbuf[0]));
599                         return 0;
600                 }
601
602                 case VTXIOCCLRFOUND:
603                 {
604                         vtx_pagereq_t *req = arg;
605
606                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
607                                 return -EINVAL;
608                         return(saa5246a_clear_found_bit(t, req->pgbuf));
609                 }
610
611                 case VTXIOCPAGEREQ:
612                 {
613                         vtx_pagereq_t *req = arg;
614
615                         return(saa5246a_request_page(t, req));
616                 }
617
618                 case VTXIOCGETSTAT:
619                 {
620                         vtx_pagereq_t *req = arg;
621                         vtx_pageinfo_t info;
622                         int rval;
623
624                         if ((rval = saa5246a_get_status(t, &info, req->pgbuf)))
625                                 return rval;
626                         if(copy_to_user(req->buffer, &info,
627                                 sizeof(vtx_pageinfo_t)))
628                                 return -EFAULT;
629                         return 0;
630                 }
631
632                 case VTXIOCGETPAGE:
633                 {
634                         vtx_pagereq_t *req = arg;
635
636                         return(saa5246a_get_page(t, req));
637                 }
638
639                 case VTXIOCSTOPDAU:
640                 {
641                         vtx_pagereq_t *req = arg;
642
643                         return(saa5246a_stop_dau(t, req->pgbuf));
644                 }
645
646                 case VTXIOCPUTPAGE:
647                 case VTXIOCSETDISP:
648                 case VTXIOCPUTSTAT:
649                         return 0;
650
651                 case VTXIOCCLRCACHE:
652                 {
653                         return 0;
654                 }
655
656                 case VTXIOCSETVIRT:
657                 {
658                         /* I do not know what "virtual mode" means */
659                         return 0;
660                 }
661         }
662         return -EINVAL;
663 }
664
665 /*
666  * Translates old vtx IOCTLs to new ones
667  *
668  * This keeps new kernel versions compatible with old userspace programs.
669  */
670 static inline unsigned int vtx_fix_command(unsigned int cmd)
671 {
672         switch (cmd) {
673         case VTXIOCGETINFO_OLD:
674                 cmd = VTXIOCGETINFO;
675                 break;
676         case VTXIOCCLRPAGE_OLD:
677                 cmd = VTXIOCCLRPAGE;
678                 break;
679         case VTXIOCCLRFOUND_OLD:
680                 cmd = VTXIOCCLRFOUND;
681                 break;
682         case VTXIOCPAGEREQ_OLD:
683                 cmd = VTXIOCPAGEREQ;
684                 break;
685         case VTXIOCGETSTAT_OLD:
686                 cmd = VTXIOCGETSTAT;
687                 break;
688         case VTXIOCGETPAGE_OLD:
689                 cmd = VTXIOCGETPAGE;
690                 break;
691         case VTXIOCSTOPDAU_OLD:
692                 cmd = VTXIOCSTOPDAU;
693                 break;
694         case VTXIOCPUTPAGE_OLD:
695                 cmd = VTXIOCPUTPAGE;
696                 break;
697         case VTXIOCSETDISP_OLD:
698                 cmd = VTXIOCSETDISP;
699                 break;
700         case VTXIOCPUTSTAT_OLD:
701                 cmd = VTXIOCPUTSTAT;
702                 break;
703         case VTXIOCCLRCACHE_OLD:
704                 cmd = VTXIOCCLRCACHE;
705                 break;
706         case VTXIOCSETVIRT_OLD:
707                 cmd = VTXIOCSETVIRT;
708                 break;
709         }
710         return cmd;
711 }
712
713 /*
714  *      Handle the locking
715  */
716 static int saa5246a_ioctl(struct inode *inode, struct file *file,
717                          unsigned int cmd, unsigned long arg)
718 {
719         struct video_device *vd = video_devdata(file);
720         struct saa5246a_device *t = vd->priv;
721         int err;
722
723         cmd = vtx_fix_command(cmd);
724         mutex_lock(&t->lock);
725         err = video_usercopy(inode, file, cmd, arg, do_saa5246a_ioctl);
726         mutex_unlock(&t->lock);
727         return err;
728 }
729
730 static int saa5246a_open(struct inode *inode, struct file *file)
731 {
732         struct video_device *vd = video_devdata(file);
733         struct saa5246a_device *t = vd->priv;
734         int err;
735
736         err = video_exclusive_open(inode,file);
737         if (err < 0)
738                 return err;
739
740         if (t->client==NULL) {
741                 err = -ENODEV;
742                 goto fail;
743         }
744
745         if (i2c_senddata(t, SAA5246A_REGISTER_R0,
746
747                 R0_SELECT_R11 |
748                 R0_PLL_TIME_CONSTANT_LONG |
749                 R0_ENABLE_nODD_EVEN_OUTPUT |
750                 R0_ENABLE_HDR_POLL |
751                 R0_DO_NOT_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED |
752                 R0_NO_FREE_RUN_PLL |
753                 R0_NO_AUTOMATIC_FASTEXT_PROMPT,
754
755                 R1_NON_INTERLACED_312_312_LINES |
756                 R1_DEW |
757                 R1_EXTENDED_PACKET_DISABLE |
758                 R1_DAUS_ALL_ON |
759                 R1_8_BITS_NO_PARITY |
760                 R1_VCS_TO_SCS,
761
762                 COMMAND_END) ||
763                 i2c_senddata(t, SAA5246A_REGISTER_R4,
764
765                 /* We do not care much for the TV display but nevertheless we
766                  * need the currently displayed page later because only on that
767                  * page the time is updated. */
768                 R4_DISPLAY_PAGE_4,
769
770                 COMMAND_END))
771         {
772                 err = -EIO;
773                 goto fail;
774         }
775
776         return 0;
777
778 fail:
779         video_exclusive_release(inode,file);
780         return err;
781 }
782
783 static int saa5246a_release(struct inode *inode, struct file *file)
784 {
785         struct video_device *vd = video_devdata(file);
786         struct saa5246a_device *t = vd->priv;
787
788         /* Stop all acquisition circuits. */
789         i2c_senddata(t, SAA5246A_REGISTER_R1,
790
791                 R1_INTERLACED_312_AND_HALF_312_AND_HALF_LINES |
792                 R1_DEW |
793                 R1_EXTENDED_PACKET_DISABLE |
794                 R1_DAUS_ALL_OFF |
795                 R1_8_BITS_NO_PARITY |
796                 R1_VCS_TO_SCS,
797
798                 COMMAND_END);
799         video_exclusive_release(inode,file);
800         return 0;
801 }
802
803 static int __init init_saa_5246a (void)
804 {
805         printk(KERN_INFO
806                 "SAA5246A (or compatible) Teletext decoder driver version %d.%d\n",
807                 MAJOR_VERSION, MINOR_VERSION);
808         return i2c_add_driver(&i2c_driver_videotext);
809 }
810
811 static void __exit cleanup_saa_5246a (void)
812 {
813         i2c_del_driver(&i2c_driver_videotext);
814 }
815
816 module_init(init_saa_5246a);
817 module_exit(cleanup_saa_5246a);
818
819 static const struct file_operations saa_fops = {
820         .owner   = THIS_MODULE,
821         .open    = saa5246a_open,
822         .release = saa5246a_release,
823         .ioctl   = saa5246a_ioctl,
824         .llseek  = no_llseek,
825 };
826
827 static struct video_device saa_template =
828 {
829         .owner    = THIS_MODULE,
830         .name     = IF_NAME,
831         .type     = VID_TYPE_TELETEXT,
832         .fops     = &saa_fops,
833         .release  = video_device_release,
834         .minor    = -1,
835 };