V4L/DVB (6948): HVR950 requires additional settings for audio to properly work
[linux-2.6] / 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 #include <media/v4l2-common.h>
60 #include <linux/mutex.h>
61
62
63 #include <asm/io.h>
64 #include <asm/uaccess.h>
65
66 #define VTX_VER_MAJ 1
67 #define VTX_VER_MIN 8
68
69
70
71 #define NUM_DAUS 4
72 #define NUM_BUFS 8
73 #define IF_NAME "SAA5249"
74
75 static const int disp_modes[8][3] =
76 {
77         { 0x46, 0x03, 0x03 },   /* DISPOFF */
78         { 0x46, 0xcc, 0xcc },   /* DISPNORM */
79         { 0x44, 0x0f, 0x0f },   /* DISPTRANS */
80         { 0x46, 0xcc, 0x46 },   /* DISPINS */
81         { 0x44, 0x03, 0x03 },   /* DISPOFF, interlaced */
82         { 0x44, 0xcc, 0xcc },   /* DISPNORM, interlaced */
83         { 0x44, 0x0f, 0x0f },   /* DISPTRANS, interlaced */
84         { 0x44, 0xcc, 0x46 }    /* DISPINS, interlaced */
85 };
86
87
88
89 #define PAGE_WAIT    msecs_to_jiffies(300)      /* Time between requesting page and */
90                                                 /* checking status bits */
91 #define PGBUF_EXPIRE msecs_to_jiffies(15000)    /* Time to wait before retransmitting */
92                                                 /* page regardless of infobits */
93 typedef struct {
94         u8 pgbuf[VTX_VIRTUALSIZE];              /* Page-buffer */
95         u8 laststat[10];                        /* Last value of infobits for DAU */
96         u8 sregs[7];                            /* Page-request registers */
97         unsigned long expire;                   /* Time when page will be expired */
98         unsigned clrfound : 1;                  /* VTXIOCCLRFOUND has been called */
99         unsigned stopped : 1;                   /* VTXIOCSTOPDAU has been called */
100 } vdau_t;
101
102 struct saa5249_device
103 {
104         vdau_t vdau[NUM_DAUS];                  /* Data for virtual DAUs (the 5249 only has one */
105                                                 /* real DAU, so we have to simulate some more) */
106         int vtx_use_count;
107         int is_searching[NUM_DAUS];
108         int disp_mode;
109         int virtual_mode;
110         struct i2c_client *client;
111         struct mutex lock;
112 };
113
114
115 #define CCTWR 34                /* I²C write/read-address of vtx-chip */
116 #define CCTRD 35
117 #define NOACK_REPEAT 10         /* Retry access this many times on failure */
118 #define CLEAR_DELAY   msecs_to_jiffies(50)      /* Time required to clear a page */
119 #define READY_TIMEOUT msecs_to_jiffies(30)      /* Time to wait for ready signal of I2C-bus interface */
120 #define INIT_DELAY 500          /* Time in usec to wait at initialization of CEA interface */
121 #define START_DELAY 10          /* Time in usec to wait before starting write-cycle (CEA) */
122
123 #define VTX_DEV_MINOR 0
124
125 /* General defines and debugging support */
126
127 #define RESCHED do { cond_resched(); } while(0)
128
129 static struct video_device saa_template;        /* Declared near bottom */
130
131 /* Addresses to scan */
132 static unsigned short normal_i2c[] = {34>>1,I2C_CLIENT_END};
133 I2C_CLIENT_INSMOD;
134
135 static struct i2c_client client_template;
136
137 static int saa5249_attach(struct i2c_adapter *adap, int addr, int kind)
138 {
139         int pgbuf;
140         int err;
141         struct i2c_client *client;
142         struct video_device *vd;
143         struct saa5249_device *t;
144
145         printk(KERN_INFO "saa5249: teletext chip found.\n");
146         client=kmalloc(sizeof(*client), GFP_KERNEL);
147         if(client==NULL)
148                 return -ENOMEM;
149         client_template.adapter = adap;
150         client_template.addr = addr;
151         memcpy(client, &client_template, sizeof(*client));
152         t = kzalloc(sizeof(*t), GFP_KERNEL);
153         if(t==NULL)
154         {
155                 kfree(client);
156                 return -ENOMEM;
157         }
158         strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
159         mutex_init(&t->lock);
160
161         /*
162          *      Now create a video4linux device
163          */
164
165         vd = kmalloc(sizeof(struct video_device), GFP_KERNEL);
166         if(vd==NULL)
167         {
168                 kfree(t);
169                 kfree(client);
170                 return -ENOMEM;
171         }
172         i2c_set_clientdata(client, vd);
173         memcpy(vd, &saa_template, sizeof(*vd));
174
175         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
176         {
177                 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
178                 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
179                 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
180                 t->vdau[pgbuf].expire = 0;
181                 t->vdau[pgbuf].clrfound = true;
182                 t->vdau[pgbuf].stopped = true;
183                 t->is_searching[pgbuf] = false;
184         }
185         vd->priv=t;
186
187
188         /*
189          *      Register it
190          */
191
192         if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
193         {
194                 kfree(t);
195                 kfree(vd);
196                 kfree(client);
197                 return err;
198         }
199         t->client = client;
200         i2c_attach_client(client);
201         return 0;
202 }
203
204 /*
205  *      We do most of the hard work when we become a device on the i2c.
206  */
207
208 static int saa5249_probe(struct i2c_adapter *adap)
209 {
210         if (adap->class & I2C_CLASS_TV_ANALOG)
211                 return i2c_probe(adap, &addr_data, saa5249_attach);
212         return 0;
213 }
214
215 static int saa5249_detach(struct i2c_client *client)
216 {
217         struct video_device *vd = i2c_get_clientdata(client);
218         i2c_detach_client(client);
219         video_unregister_device(vd);
220         kfree(vd->priv);
221         kfree(vd);
222         kfree(client);
223         return 0;
224 }
225
226 /* new I2C driver support */
227
228 static struct i2c_driver i2c_driver_videotext =
229 {
230         .driver = {
231                 .name   = IF_NAME,              /* name */
232         },
233         .id             = I2C_DRIVERID_SAA5249, /* in i2c.h */
234         .attach_adapter = saa5249_probe,
235         .detach_client  = saa5249_detach,
236 };
237
238 static struct i2c_client client_template = {
239         .driver         = &i2c_driver_videotext,
240         .name           = "(unset)",
241 };
242
243 /*
244  *      Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
245  *      delay may be longer.
246  */
247
248 static void jdelay(unsigned long delay)
249 {
250         sigset_t oldblocked = current->blocked;
251
252         spin_lock_irq(&current->sighand->siglock);
253         sigfillset(&current->blocked);
254         recalc_sigpending();
255         spin_unlock_irq(&current->sighand->siglock);
256         msleep_interruptible(jiffies_to_msecs(delay));
257
258         spin_lock_irq(&current->sighand->siglock);
259         current->blocked = oldblocked;
260         recalc_sigpending();
261         spin_unlock_irq(&current->sighand->siglock);
262 }
263
264
265 /*
266  *      I2C interfaces
267  */
268
269 static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data)
270 {
271         char buf[64];
272
273         buf[0] = reg;
274         memcpy(buf+1, data, count);
275
276         if(i2c_master_send(t->client, buf, count+1)==count+1)
277                 return 0;
278         return -1;
279 }
280
281 static int i2c_senddata(struct saa5249_device *t, ...)
282 {
283         unsigned char buf[64];
284         int v;
285         int ct = 0;
286         va_list argp;
287         va_start(argp,t);
288
289         while ((v = va_arg(argp, int)) != -1)
290                 buf[ct++] = v;
291
292         va_end(argp);
293         return i2c_sendbuf(t, buf[0], ct-1, buf+1);
294 }
295
296 /* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop
297  * handshaking is done by this routine, ack will be sent after the last byte to inhibit further
298  * sending of data. If uaccess is 'true', data is written to user-space with put_user.
299  * Returns -1 if I²C-device didn't send acknowledge, 0 otherwise
300  */
301
302 static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf)
303 {
304         if(i2c_master_recv(t->client, buf, count)!=count)
305                 return -1;
306         return 0;
307 }
308
309
310 /*
311  *      Standard character-device-driver functions
312  */
313
314 static int do_saa5249_ioctl(struct inode *inode, struct file *file,
315                             unsigned int cmd, void *arg)
316 {
317         static int virtual_mode = false;
318         struct video_device *vd = video_devdata(file);
319         struct saa5249_device *t=vd->priv;
320
321         switch(cmd)
322         {
323                 case VTXIOCGETINFO:
324                 {
325                         vtx_info_t *info = arg;
326                         info->version_major = VTX_VER_MAJ;
327                         info->version_minor = VTX_VER_MIN;
328                         info->numpages = NUM_DAUS;
329                         /*info->cct_type = CCT_TYPE;*/
330                         return 0;
331                 }
332
333                 case VTXIOCCLRPAGE:
334                 {
335                         vtx_pagereq_t *req = arg;
336
337                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
338                                 return -EINVAL;
339                         memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
340                         t->vdau[req->pgbuf].clrfound = true;
341                         return 0;
342                 }
343
344                 case VTXIOCCLRFOUND:
345                 {
346                         vtx_pagereq_t *req = arg;
347
348                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
349                                 return -EINVAL;
350                         t->vdau[req->pgbuf].clrfound = true;
351                         return 0;
352                 }
353
354                 case VTXIOCPAGEREQ:
355                 {
356                         vtx_pagereq_t *req = arg;
357                         if (!(req->pagemask & PGMASK_PAGE))
358                                 req->page = 0;
359                         if (!(req->pagemask & PGMASK_HOUR))
360                                 req->hour = 0;
361                         if (!(req->pagemask & PGMASK_MINUTE))
362                                 req->minute = 0;
363                         if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
364                                 return -EINVAL;
365                         req->page &= 0x7ff;
366                         if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
367                                 req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
368                                 return -EINVAL;
369                         t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
370                         t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
371                         t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
372                         t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
373                         t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
374                         t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
375                         t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
376                         t->vdau[req->pgbuf].stopped = false;
377                         t->vdau[req->pgbuf].clrfound = true;
378                         t->is_searching[req->pgbuf] = true;
379                         return 0;
380                 }
381
382                 case VTXIOCGETSTAT:
383                 {
384                         vtx_pagereq_t *req = arg;
385                         u8 infobits[10];
386                         vtx_pageinfo_t info;
387                         int a;
388
389                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
390                                 return -EINVAL;
391                         if (!t->vdau[req->pgbuf].stopped)
392                         {
393                                 if (i2c_senddata(t, 2, 0, -1) ||
394                                         i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
395                                         i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
396                                         i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
397                                         i2c_senddata(t, 8, 0, 25, 0, -1))
398                                         return -EIO;
399                                 jdelay(PAGE_WAIT);
400                                 if (i2c_getdata(t, 10, infobits))
401                                         return -EIO;
402
403                                 if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) &&   /* check FOUND-bit */
404                                         (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
405                                         time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
406                                 {               /* check if new page arrived */
407                                         if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
408                                                 i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
409                                                 return -EIO;
410                                         t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
411                                         memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
412                                         if (t->virtual_mode)
413                                         {
414                                                 /* Packet X/24 */
415                                                 if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
416                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
417                                                         return -EIO;
418                                                 /* Packet X/27/0 */
419                                                 if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
420                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
421                                                         return -EIO;
422                                                 /* Packet 8/30/0...8/30/15
423                                                  * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
424                                                  *        so we should undo this here.
425                                                  */
426                                                 if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
427                                                         i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
428                                                         return -EIO;
429                                         }
430                                         t->vdau[req->pgbuf].clrfound = false;
431                                         memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
432                                 }
433                                 else
434                                 {
435                                         memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
436                                 }
437                         }
438                         else
439                         {
440                                 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
441                         }
442
443                         info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
444                         if (info.pagenum < 0x100)
445                                 info.pagenum += 0x800;
446                         info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
447                         info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
448                         info.charset = ((infobits[7] >> 1) & 7);
449                         info.delete = !!(infobits[3] & 8);
450                         info.headline = !!(infobits[5] & 4);
451                         info.subtitle = !!(infobits[5] & 8);
452                         info.supp_header = !!(infobits[6] & 1);
453                         info.update = !!(infobits[6] & 2);
454                         info.inter_seq = !!(infobits[6] & 4);
455                         info.dis_disp = !!(infobits[6] & 8);
456                         info.serial = !!(infobits[7] & 1);
457                         info.notfound = !!(infobits[8] & 0x10);
458                         info.pblf = !!(infobits[9] & 0x20);
459                         info.hamming = 0;
460                         for (a = 0; a <= 7; a++)
461                         {
462                                 if (infobits[a] & 0xf0)
463                                 {
464                                         info.hamming = 1;
465                                         break;
466                                 }
467                         }
468                         if (t->vdau[req->pgbuf].clrfound)
469                                 info.notfound = 1;
470                         if(copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
471                                 return -EFAULT;
472                         if (!info.hamming && !info.notfound)
473                         {
474                                 t->is_searching[req->pgbuf] = false;
475                         }
476                         return 0;
477                 }
478
479                 case VTXIOCGETPAGE:
480                 {
481                         vtx_pagereq_t *req = arg;
482                         int start, end;
483
484                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
485                                 req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
486                                 return -EINVAL;
487                         if(copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
488                                 return -EFAULT;
489
490                          /*
491                           *     Always read the time directly from SAA5249
492                           */
493
494                         if (req->start <= 39 && req->end >= 32)
495                         {
496                                 int len;
497                                 char buf[16];
498                                 start = max(req->start, 32);
499                                 end = min(req->end, 39);
500                                 len=end-start+1;
501                                 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
502                                         i2c_getdata(t, len, buf))
503                                         return -EIO;
504                                 if(copy_to_user(req->buffer+start-req->start, buf, len))
505                                         return -EFAULT;
506                         }
507                         /* Insert the current header if DAU is still searching for a page */
508                         if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf])
509                         {
510                                 char buf[32];
511                                 int len;
512                                 start = max(req->start, 7);
513                                 end = min(req->end, 31);
514                                 len=end-start+1;
515                                 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
516                                         i2c_getdata(t, len, buf))
517                                         return -EIO;
518                                 if(copy_to_user(req->buffer+start-req->start, buf, len))
519                                         return -EFAULT;
520                         }
521                         return 0;
522                 }
523
524                 case VTXIOCSTOPDAU:
525                 {
526                         vtx_pagereq_t *req = arg;
527
528                         if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
529                                 return -EINVAL;
530                         t->vdau[req->pgbuf].stopped = true;
531                         t->is_searching[req->pgbuf] = false;
532                         return 0;
533                 }
534
535                 case VTXIOCPUTPAGE:
536                 case VTXIOCSETDISP:
537                 case VTXIOCPUTSTAT:
538                         return 0;
539
540                 case VTXIOCCLRCACHE:
541                 {
542                         if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
543                                 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',
544                                 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ', -1))
545                                 return -EIO;
546                         if (i2c_senddata(t, 3, 0x20, -1))
547                                 return -EIO;
548                         jdelay(10 * CLEAR_DELAY);                       /* I have no idea how long we have to wait here */
549                         return 0;
550                 }
551
552                 case VTXIOCSETVIRT:
553                 {
554                         /* The SAA5249 has virtual-row reception turned on always */
555                         t->virtual_mode = (int)(long)arg;
556                         return 0;
557                 }
558         }
559         return -EINVAL;
560 }
561
562 /*
563  * Translates old vtx IOCTLs to new ones
564  *
565  * This keeps new kernel versions compatible with old userspace programs.
566  */
567 static inline unsigned int vtx_fix_command(unsigned int cmd)
568 {
569         switch (cmd) {
570         case VTXIOCGETINFO_OLD:
571                 cmd = VTXIOCGETINFO;
572                 break;
573         case VTXIOCCLRPAGE_OLD:
574                 cmd = VTXIOCCLRPAGE;
575                 break;
576         case VTXIOCCLRFOUND_OLD:
577                 cmd = VTXIOCCLRFOUND;
578                 break;
579         case VTXIOCPAGEREQ_OLD:
580                 cmd = VTXIOCPAGEREQ;
581                 break;
582         case VTXIOCGETSTAT_OLD:
583                 cmd = VTXIOCGETSTAT;
584                 break;
585         case VTXIOCGETPAGE_OLD:
586                 cmd = VTXIOCGETPAGE;
587                 break;
588         case VTXIOCSTOPDAU_OLD:
589                 cmd = VTXIOCSTOPDAU;
590                 break;
591         case VTXIOCPUTPAGE_OLD:
592                 cmd = VTXIOCPUTPAGE;
593                 break;
594         case VTXIOCSETDISP_OLD:
595                 cmd = VTXIOCSETDISP;
596                 break;
597         case VTXIOCPUTSTAT_OLD:
598                 cmd = VTXIOCPUTSTAT;
599                 break;
600         case VTXIOCCLRCACHE_OLD:
601                 cmd = VTXIOCCLRCACHE;
602                 break;
603         case VTXIOCSETVIRT_OLD:
604                 cmd = VTXIOCSETVIRT;
605                 break;
606         }
607         return cmd;
608 }
609
610 /*
611  *      Handle the locking
612  */
613
614 static int saa5249_ioctl(struct inode *inode, struct file *file,
615                          unsigned int cmd, unsigned long arg)
616 {
617         struct video_device *vd = video_devdata(file);
618         struct saa5249_device *t=vd->priv;
619         int err;
620
621         cmd = vtx_fix_command(cmd);
622         mutex_lock(&t->lock);
623         err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
624         mutex_unlock(&t->lock);
625         return err;
626 }
627
628 static int saa5249_open(struct inode *inode, struct file *file)
629 {
630         struct video_device *vd = video_devdata(file);
631         struct saa5249_device *t=vd->priv;
632         int err,pgbuf;
633
634         err = video_exclusive_open(inode,file);
635         if (err < 0)
636                 return err;
637
638         if (t->client==NULL) {
639                 err = -ENODEV;
640                 goto fail;
641         }
642
643         if (i2c_senddata(t, 0, 0, -1) ||                /* Select R11 */
644                                                 /* Turn off parity checks (we do this ourselves) */
645                 i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
646                                                 /* Display TV-picture, no virtual rows */
647                 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 */
648
649         {
650                 err = -EIO;
651                 goto fail;
652         }
653
654         for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
655         {
656                 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
657                 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
658                 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
659                 t->vdau[pgbuf].expire = 0;
660                 t->vdau[pgbuf].clrfound = true;
661                 t->vdau[pgbuf].stopped = true;
662                 t->is_searching[pgbuf] = false;
663         }
664         t->virtual_mode = false;
665         return 0;
666
667  fail:
668         video_exclusive_release(inode,file);
669         return err;
670 }
671
672
673
674 static int saa5249_release(struct inode *inode, struct file *file)
675 {
676         struct video_device *vd = video_devdata(file);
677         struct saa5249_device *t=vd->priv;
678         i2c_senddata(t, 1, 0x20, -1);           /* Turn off CCT */
679         i2c_senddata(t, 5, 3, 3, -1);           /* Turn off TV-display */
680         video_exclusive_release(inode,file);
681         return 0;
682 }
683
684 static int __init init_saa_5249 (void)
685 {
686         printk(KERN_INFO "SAA5249 driver (" IF_NAME " interface) for VideoText version %d.%d\n",
687                         VTX_VER_MAJ, VTX_VER_MIN);
688         return i2c_add_driver(&i2c_driver_videotext);
689 }
690
691 static void __exit cleanup_saa_5249 (void)
692 {
693         i2c_del_driver(&i2c_driver_videotext);
694 }
695
696 module_init(init_saa_5249);
697 module_exit(cleanup_saa_5249);
698
699 static const struct file_operations saa_fops = {
700         .owner          = THIS_MODULE,
701         .open           = saa5249_open,
702         .release        = saa5249_release,
703         .ioctl          = saa5249_ioctl,
704         .compat_ioctl   = v4l_compat_ioctl32,
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         .fops           = &saa_fops,
714 };
715
716 MODULE_LICENSE("GPL");