blob: 7ffa2e9a9bf3b78d2c66af08d11460d240cbf761 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
72static 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 */
90typedef 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
99struct 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
131static struct video_device saa_template; /* Declared near bottom */
132
133/* Addresses to scan */
134static unsigned short normal_i2c[] = {34>>1,I2C_CLIENT_END};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135I2C_CLIENT_INSMOD;
136
137static struct i2c_client client_template;
138
139static 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
211static 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
218static 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
229static 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
237static 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
248static 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
258static 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
279static 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
291static 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
310static 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
322static 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 */
575static 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
622static 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
636static 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
682static 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
692static 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
699static void __exit cleanup_saa_5249 (void)
700{
701 i2c_del_driver(&i2c_driver_videotext);
702}
703
704module_init(init_saa_5249);
705module_exit(cleanup_saa_5249);
706
707static 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
715static 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
724MODULE_LICENSE("GPL");