7ffa2e9a9bf3b78d2c66af08d11460d240cbf761
[linux-2.6.git] / 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 I2C_CLIENT_INSMOD;
136
137 static struct i2c_client client_template;
138
139 static int saa5249_attach(struct i2c_adapter *adap, int addr, int kind)
140 {
141         int pgbuf;
142         int err;
143         struct i2c_client *client;
144         struct video_device *vd;
145         struct saa5249_device *t;
146
147         printk(KERN_INFO "saa5249: teletext chip found.\n");
148         client=kmalloc(sizeof(*client), GFP_KERNEL);
149         if(client==NULL)
150                 return -ENOMEM;
151         client_template.adapter = adap;
152         client_template.addr = addr;
153         memcpy(client, &client_template, sizeof(*client));
154         t = kmalloc(sizeof(*t), GFP_KERNEL);
155         if(t==NULL)
156         {
157                 kfree(client);
158                 return -ENOMEM;
159         }
160         memset(t, 0, sizeof(*t));
161         strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
162         init_MUTEX(&t->lock);
163         
164         /*
165          *      Now create a video4linux device
166          */
167          
168         vd = (struct video_device *)kmalloc(sizeof(struct video_device), GFP_KERNEL);
169         if(vd==NULL)
170         {
171                 kfree(t);
172                 kfree(client);
173                 return -ENOMEM;
174         }
175         i2c_set_clientdata(client, vd);
176         memcpy(vd, &saa_template, sizeof(*vd));
177                 
178         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) 
179         {
180                 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
181                 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
182                 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
183                 t->vdau[pgbuf].expire = 0;
184                 t->vdau[pgbuf].clrfound = TRUE;
185                 t->vdau[pgbuf].stopped = TRUE;
186                 t->is_searching[pgbuf] = FALSE;
187         }
188         vd->priv=t;     
189          
190         
191         /*
192          *      Register it
193          */
194
195         if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
196         {
197                 kfree(t);
198                 kfree(vd);
199                 kfree(client);
200                 return err;
201         }
202         t->client = client;
203         i2c_attach_client(client);
204         return 0;
205 }
206
207 /*
208  *      We do most of the hard work when we become a device on the i2c.
209  */
210  
211 static int saa5249_probe(struct i2c_adapter *adap)
212 {
213         if (adap->class & I2C_CLASS_TV_ANALOG)
214                 return i2c_probe(adap, &addr_data, saa5249_attach);
215         return 0;
216 }
217
218 static int saa5249_detach(struct i2c_client *client)
219 {
220         struct video_device *vd = i2c_get_clientdata(client);
221         i2c_detach_client(client);
222         video_unregister_device(vd);
223         kfree(vd->priv);
224         kfree(vd);
225         kfree(client);
226         return 0;
227 }
228
229 static int saa5249_command(struct i2c_client *device,
230                              unsigned int cmd, void *arg)
231 {
232         return -EINVAL;
233 }
234
235 /* new I2C driver support */
236
237 static struct i2c_driver i2c_driver_videotext = 
238 {
239         .owner          = THIS_MODULE,
240         .name           = IF_NAME,              /* name */
241         .id             = I2C_DRIVERID_SAA5249, /* in i2c.h */
242         .flags          = I2C_DF_NOTIFY,
243         .attach_adapter = saa5249_probe,
244         .detach_client  = saa5249_detach,
245         .command        = saa5249_command
246 };
247
248 static struct i2c_client client_template = {
249         .driver         = &i2c_driver_videotext,
250         .name           = "(unset)",
251 };
252
253 /*
254  *      Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
255  *      delay may be longer.
256  */
257
258 static void jdelay(unsigned long delay) 
259 {
260         sigset_t oldblocked = current->blocked;
261
262         spin_lock_irq(&current->sighand->siglock);
263         sigfillset(&current->blocked);
264         recalc_sigpending();
265         spin_unlock_irq(&current->sighand->siglock);
266         msleep_interruptible(jiffies_to_msecs(delay));
267
268         spin_lock_irq(&current->sighand->siglock);
269         current->blocked = oldblocked;
270         recalc_sigpending();
271         spin_unlock_irq(&current->sighand->siglock);
272 }
273
274
275 /*
276  *      I2C interfaces
277  */
278  
279 static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data) 
280 {
281         char buf[64];
282         
283         buf[0] = reg;
284         memcpy(buf+1, data, count);
285         
286         if(i2c_master_send(t->client, buf, count+1)==count+1)
287                 return 0;
288         return -1;
289 }
290
291 static int i2c_senddata(struct saa5249_device *t, ...)
292 {
293         unsigned char buf[64];
294         int v;
295         int ct=0;
296         va_list argp;
297         va_start(argp,t);
298         
299         while((v=va_arg(argp,int))!=-1)
300                 buf[ct++]=v;
301         return i2c_sendbuf(t, buf[0], ct-1, buf+1);
302 }
303
304 /* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop
305  * handshaking is done by this routine, ack will be sent after the last byte to inhibit further
306  * sending of data. If uaccess is TRUE, data is written to user-space with put_user.
307  * Returns -1 if I²C-device didn't send acknowledge, 0 otherwise
308  */
309
310 static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf) 
311 {
312         if(i2c_master_recv(t->client, buf, count)!=count)
313                 return -1;
314         return 0;
315 }
316
317
318 /*
319  *      Standard character-device-driver functions
320  */
321
322 static int do_saa5249_ioctl(struct inode *inode, struct file *file,
323                             unsigned int cmd, void *arg)
324 {
325         static int virtual_mode = FALSE;
326         struct video_device *vd = video_devdata(file);
327         struct saa5249_device *t=vd->priv;
328
329         switch(cmd) 
330         {
331                 case VTXIOCGETINFO: 
332                 {
333                         vtx_info_t *info = arg;
334                         info->version_major = VTX_VER_MAJ;
335                         info->version_minor = VTX_VER_MIN;
336                         info->numpages = NUM_DAUS;
337                         /*info->cct_type = CCT_TYPE;*/
338                         return 0;
339                 }
340
341                 case VTXIOCCLRPAGE: 
342                 {
343                         vtx_pagereq_t *req = arg;
344       
345                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
346                                 return -EINVAL;
347                         memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
348                         t->vdau[req->pgbuf].clrfound = TRUE;
349                         return 0;
350                 }
351
352                 case VTXIOCCLRFOUND: 
353                 {
354                         vtx_pagereq_t *req = arg;
355       
356                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
357                                 return -EINVAL;
358                         t->vdau[req->pgbuf].clrfound = TRUE;
359                         return 0;
360                 }
361
362                 case VTXIOCPAGEREQ: 
363                 {
364                         vtx_pagereq_t *req = arg;
365                         if (!(req->pagemask & PGMASK_PAGE))
366                                 req->page = 0;
367                         if (!(req->pagemask & PGMASK_HOUR))
368                                 req->hour = 0;
369                         if (!(req->pagemask & PGMASK_MINUTE))
370                                 req->minute = 0;
371                         if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
372                                 return -EINVAL;
373                         req->page &= 0x7ff;
374                         if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
375                                 req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
376                                 return -EINVAL;
377                         t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
378                         t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
379                         t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
380                         t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
381                         t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
382                         t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
383                         t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
384                         t->vdau[req->pgbuf].stopped = FALSE;
385                         t->vdau[req->pgbuf].clrfound = TRUE;
386                         t->is_searching[req->pgbuf] = TRUE;
387                         return 0;
388                 }
389
390                 case VTXIOCGETSTAT: 
391                 {
392                         vtx_pagereq_t *req = arg;
393                         u8 infobits[10];
394                         vtx_pageinfo_t info;
395                         int a;
396
397                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
398                                 return -EINVAL;
399                         if (!t->vdau[req->pgbuf].stopped) 
400                         {
401                                 if (i2c_senddata(t, 2, 0, -1) ||
402                                         i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
403                                         i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
404                                         i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
405                                         i2c_senddata(t, 8, 0, 25, 0, -1))
406                                         return -EIO;
407                                 jdelay(PAGE_WAIT);
408                                 if (i2c_getdata(t, 10, infobits))
409                                         return -EIO;
410
411                                 if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) &&   /* check FOUND-bit */
412                                         (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) || 
413                                         time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
414                                 {               /* check if new page arrived */
415                                         if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
416                                                 i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
417                                                 return -EIO;
418                                         t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
419                                         memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
420                                         if (t->virtual_mode) 
421                                         {
422                                                 /* Packet X/24 */
423                                                 if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
424                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
425                                                         return -EIO;
426                                                 /* Packet X/27/0 */
427                                                 if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
428                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
429                                                         return -EIO;
430                                                 /* Packet 8/30/0...8/30/15
431                                                  * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
432                                                  *        so we should undo this here.
433                                                  */
434                                                 if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
435                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
436                                                         return -EIO;
437                                         }
438                                         t->vdau[req->pgbuf].clrfound = FALSE;
439                                         memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
440                                 }
441                                 else
442                                 {
443                                         memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
444                                 }
445                         }
446                         else
447                         {
448                                 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
449                         }
450
451                         info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
452                         if (info.pagenum < 0x100)
453                                 info.pagenum += 0x800;
454                         info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
455                         info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
456                         info.charset = ((infobits[7] >> 1) & 7);
457                         info.delete = !!(infobits[3] & 8);
458                         info.headline = !!(infobits[5] & 4);
459                         info.subtitle = !!(infobits[5] & 8);
460                         info.supp_header = !!(infobits[6] & 1);
461                         info.update = !!(infobits[6] & 2);
462                         info.inter_seq = !!(infobits[6] & 4);
463                         info.dis_disp = !!(infobits[6] & 8);
464                         info.serial = !!(infobits[7] & 1);
465                         info.notfound = !!(infobits[8] & 0x10);
466                         info.pblf = !!(infobits[9] & 0x20);
467                         info.hamming = 0;
468                         for (a = 0; a <= 7; a++) 
469                         {
470                                 if (infobits[a] & 0xf0) 
471                                 {
472                                         info.hamming = 1;
473                                         break;
474                                 }
475                         }
476                         if (t->vdau[req->pgbuf].clrfound)
477                                 info.notfound = 1;
478                         if(copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
479                                 return -EFAULT;
480                         if (!info.hamming && !info.notfound) 
481                         {
482                                 t->is_searching[req->pgbuf] = FALSE;
483                         }
484                         return 0;
485                 }
486
487                 case VTXIOCGETPAGE: 
488                 {
489                         vtx_pagereq_t *req = arg;
490                         int start, end;
491
492                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
493                                 req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
494                                 return -EINVAL;
495                         if(copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
496                                 return -EFAULT;
497                                 
498                          /* 
499                           *     Always read the time directly from SAA5249
500                           */
501                           
502                         if (req->start <= 39 && req->end >= 32) 
503                         {
504                                 int len;
505                                 char buf[16];  
506                                 start = max(req->start, 32);
507                                 end = min(req->end, 39);
508                                 len=end-start+1;
509                                 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
510                                         i2c_getdata(t, len, buf))
511                                         return -EIO;
512                                 if(copy_to_user(req->buffer+start-req->start, buf, len))
513                                         return -EFAULT;
514                         }
515                         /* Insert the current header if DAU is still searching for a page */
516                         if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf]) 
517                         {
518                                 char buf[32];
519                                 int len;
520                                 start = max(req->start, 7);
521                                 end = min(req->end, 31);
522                                 len=end-start+1;
523                                 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
524                                         i2c_getdata(t, len, buf))
525                                         return -EIO;
526                                 if(copy_to_user(req->buffer+start-req->start, buf, len))
527                                         return -EFAULT;
528                         }
529                         return 0;
530                 }
531
532                 case VTXIOCSTOPDAU: 
533                 {
534                         vtx_pagereq_t *req = arg;
535
536                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
537                                 return -EINVAL;
538                         t->vdau[req->pgbuf].stopped = TRUE;
539                         t->is_searching[req->pgbuf] = FALSE;
540                         return 0;
541                 }
542
543                 case VTXIOCPUTPAGE: 
544                 case VTXIOCSETDISP: 
545                 case VTXIOCPUTSTAT: 
546                         return 0;
547                         
548                 case VTXIOCCLRCACHE: 
549                 {
550                         if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
551                                 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',
552                                 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ', -1))
553                                 return -EIO;
554                         if (i2c_senddata(t, 3, 0x20, -1))
555                                 return -EIO;
556                         jdelay(10 * CLEAR_DELAY);                       /* I have no idea how long we have to wait here */
557                         return 0;
558                 }
559
560                 case VTXIOCSETVIRT: 
561                 {
562                         /* The SAA5249 has virtual-row reception turned on always */
563                         t->virtual_mode = (int)(long)arg;
564                         return 0;
565                 }
566         }
567         return -EINVAL;
568 }
569
570 /*
571  * Translates old vtx IOCTLs to new ones
572  *
573  * This keeps new kernel versions compatible with old userspace programs.
574  */
575 static inline unsigned int vtx_fix_command(unsigned int cmd)
576 {
577         switch (cmd) {
578         case VTXIOCGETINFO_OLD:
579                 cmd = VTXIOCGETINFO;
580                 break;
581         case VTXIOCCLRPAGE_OLD:
582                 cmd = VTXIOCCLRPAGE;
583                 break;
584         case VTXIOCCLRFOUND_OLD:
585                 cmd = VTXIOCCLRFOUND;
586                 break;
587         case VTXIOCPAGEREQ_OLD:
588                 cmd = VTXIOCPAGEREQ;
589                 break;
590         case VTXIOCGETSTAT_OLD:
591                 cmd = VTXIOCGETSTAT;
592                 break;
593         case VTXIOCGETPAGE_OLD:
594                 cmd = VTXIOCGETPAGE;
595                 break;
596         case VTXIOCSTOPDAU_OLD:
597                 cmd = VTXIOCSTOPDAU;
598                 break;
599         case VTXIOCPUTPAGE_OLD:
600                 cmd = VTXIOCPUTPAGE;
601                 break;
602         case VTXIOCSETDISP_OLD:
603                 cmd = VTXIOCSETDISP;
604                 break;
605         case VTXIOCPUTSTAT_OLD:
606                 cmd = VTXIOCPUTSTAT;
607                 break;
608         case VTXIOCCLRCACHE_OLD:
609                 cmd = VTXIOCCLRCACHE;
610                 break;
611         case VTXIOCSETVIRT_OLD:
612                 cmd = VTXIOCSETVIRT;
613                 break;
614         }
615         return cmd;
616 }
617
618 /*
619  *      Handle the locking
620  */
621  
622 static int saa5249_ioctl(struct inode *inode, struct file *file,
623                          unsigned int cmd, unsigned long arg) 
624 {
625         struct video_device *vd = video_devdata(file);
626         struct saa5249_device *t=vd->priv;
627         int err;
628         
629         cmd = vtx_fix_command(cmd);
630         down(&t->lock);
631         err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
632         up(&t->lock);
633         return err;
634 }
635
636 static int saa5249_open(struct inode *inode, struct file *file) 
637 {
638         struct video_device *vd = video_devdata(file);
639         struct saa5249_device *t=vd->priv;
640         int err,pgbuf;
641
642         err = video_exclusive_open(inode,file);
643         if (err < 0)
644                 return err;
645         
646         if (t->client==NULL) {
647                 err = -ENODEV;
648                 goto fail;
649         }
650
651         if (i2c_senddata(t, 0, 0, -1) ||                /* Select R11 */
652                                                 /* Turn off parity checks (we do this ourselves) */
653                 i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
654                                                 /* Display TV-picture, no virtual rows */
655                 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 */
656         
657         {
658                 err = -EIO;
659                 goto fail;
660         }
661
662         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) 
663         {
664                 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
665                 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
666                 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
667                 t->vdau[pgbuf].expire = 0;
668                 t->vdau[pgbuf].clrfound = TRUE;
669                 t->vdau[pgbuf].stopped = TRUE;
670                 t->is_searching[pgbuf] = FALSE;
671         }
672         t->virtual_mode=FALSE;
673         return 0;
674
675  fail:
676         video_exclusive_release(inode,file);
677         return err;
678 }
679
680
681
682 static int saa5249_release(struct inode *inode, struct file *file) 
683 {
684         struct video_device *vd = video_devdata(file);
685         struct saa5249_device *t=vd->priv;
686         i2c_senddata(t, 1, 0x20, -1);           /* Turn off CCT */
687         i2c_senddata(t, 5, 3, 3, -1);           /* Turn off TV-display */
688         video_exclusive_release(inode,file);
689         return 0;
690 }
691
692 static int __init init_saa_5249 (void)
693 {
694         printk(KERN_INFO "SAA5249 driver (" IF_NAME " interface) for VideoText version %d.%d\n",
695                         VTX_VER_MAJ, VTX_VER_MIN);
696         return i2c_add_driver(&i2c_driver_videotext);
697 }
698
699 static void __exit cleanup_saa_5249 (void) 
700 {
701         i2c_del_driver(&i2c_driver_videotext);
702 }
703
704 module_init(init_saa_5249);
705 module_exit(cleanup_saa_5249);
706
707 static struct file_operations saa_fops = {
708         .owner          = THIS_MODULE,
709         .open           = saa5249_open,
710         .release        = saa5249_release,
711         .ioctl          = saa5249_ioctl,
712         .llseek         = no_llseek,
713 };
714
715 static struct video_device saa_template =
716 {
717         .owner          = THIS_MODULE,
718         .name           = IF_NAME,
719         .type           = VID_TYPE_TELETEXT,    /*| VID_TYPE_TUNER ?? */
720         .hardware       = VID_HARDWARE_SAA5249,
721         .fops           = &saa_fops,
722 };
723
724 MODULE_LICENSE("GPL");