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