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 static unsigned short normal_i2c_range[] = {I2C_CLIENT_END};
136 static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
137 static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
138 static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
139 static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
140 static unsigned short force[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
141
142 static struct i2c_client_address_data addr_data = {
143 normal_i2c, normal_i2c_range,
144 probe, probe_range,
145 ignore, ignore_range,
146 force
147 };
148
149 static struct i2c_client client_template;
150
151 static int saa5249_attach(struct i2c_adapter *adap, int addr, int kind)
152 {
153 int pgbuf;
154 int err;
155 struct i2c_client *client;
156 struct video_device *vd;
157 struct saa5249_device *t;
158
159 printk(KERN_INFO "saa5249: teletext chip found.\n");
160 client=kmalloc(sizeof(*client), GFP_KERNEL);
161 if(client==NULL)
162 return -ENOMEM;
163 client_template.adapter = adap;
164 client_template.addr = addr;
165 memcpy(client, &client_template, sizeof(*client));
166 t = kmalloc(sizeof(*t), GFP_KERNEL);
167 if(t==NULL)
168 {
169 kfree(client);
170 return -ENOMEM;
171 }
172 memset(t, 0, sizeof(*t));
173 strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
174 init_MUTEX(&t->lock);
175
176 /*
177 * Now create a video4linux device
178 */
179
180 vd = (struct video_device *)kmalloc(sizeof(struct video_device), GFP_KERNEL);
181 if(vd==NULL)
182 {
183 kfree(t);
184 kfree(client);
185 return -ENOMEM;
186 }
187 i2c_set_clientdata(client, vd);
188 memcpy(vd, &saa_template, sizeof(*vd));
189
190 for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
191 {
192 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
193 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
194 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
195 t->vdau[pgbuf].expire = 0;
196 t->vdau[pgbuf].clrfound = TRUE;
197 t->vdau[pgbuf].stopped = TRUE;
198 t->is_searching[pgbuf] = FALSE;
199 }
200 vd->priv=t;
201
202
203 /*
204 * Register it
205 */
206
207 if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
208 {
209 kfree(t);
210 kfree(vd);
211 kfree(client);
212 return err;
213 }
214 t->client = client;
215 i2c_attach_client(client);
216 return 0;
217 }
218
219 /*
220 * We do most of the hard work when we become a device on the i2c.
221 */
222
223 static int saa5249_probe(struct i2c_adapter *adap)
224 {
225 if (adap->class & I2C_CLASS_TV_ANALOG)
226 return i2c_probe(adap, &addr_data, saa5249_attach);
227 return 0;
228 }
229
230 static int saa5249_detach(struct i2c_client *client)
231 {
232 struct video_device *vd = i2c_get_clientdata(client);
233 i2c_detach_client(client);
234 video_unregister_device(vd);
235 kfree(vd->priv);
236 kfree(vd);
237 kfree(client);
238 return 0;
239 }
240
241 static int saa5249_command(struct i2c_client *device,
242 unsigned int cmd, void *arg)
243 {
244 return -EINVAL;
245 }
246
247 /* new I2C driver support */
248
249 static struct i2c_driver i2c_driver_videotext =
250 {
251 .owner = THIS_MODULE,
252 .name = IF_NAME, /* name */
253 .id = I2C_DRIVERID_SAA5249, /* in i2c.h */
254 .flags = I2C_DF_NOTIFY,
255 .attach_adapter = saa5249_probe,
256 .detach_client = saa5249_detach,
257 .command = saa5249_command
258 };
259
260 static struct i2c_client client_template = {
261 .id = -1,
262 .driver = &i2c_driver_videotext,
263 .name = "(unset)",
264 };
265
266 /*
267 * Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
268 * delay may be longer.
269 */
270
271 static void jdelay(unsigned long delay)
272 {
273 sigset_t oldblocked = current->blocked;
274
275 spin_lock_irq(¤t->sighand->siglock);
276 sigfillset(¤t->blocked);
277 recalc_sigpending();
278 spin_unlock_irq(¤t->sighand->siglock);
279 msleep_interruptible(jiffies_to_msecs(delay));
280
281 spin_lock_irq(¤t->sighand->siglock);
282 current->blocked = oldblocked;
283 recalc_sigpending();
284 spin_unlock_irq(¤t->sighand->siglock);
285 }
286
287
288 /*
289 * I2C interfaces
290 */
291
292 static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data)
293 {
294 char buf[64];
295
296 buf[0] = reg;
297 memcpy(buf+1, data, count);
298
299 if(i2c_master_send(t->client, buf, count+1)==count+1)
300 return 0;
301 return -1;
302 }
303
304 static int i2c_senddata(struct saa5249_device *t, ...)
305 {
306 unsigned char buf[64];
307 int v;
308 int ct=0;
309 va_list argp;
310 va_start(argp,t);
311
312 while((v=va_arg(argp,int))!=-1)
313 buf[ct++]=v;
314 return i2c_sendbuf(t, buf[0], ct-1, buf+1);
315 }
316
317 /* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop
318 * handshaking is done by this routine, ack will be sent after the last byte to inhibit further
319 * sending of data. If uaccess is TRUE, data is written to user-space with put_user.
320 * Returns -1 if I²C-device didn't send acknowledge, 0 otherwise
321 */
322
323 static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf)
324 {
325 if(i2c_master_recv(t->client, buf, count)!=count)
326 return -1;
327 return 0;
328 }
329
330
331 /*
332 * Standard character-device-driver functions
333 */
334
335 static int do_saa5249_ioctl(struct inode *inode, struct file *file,
336 unsigned int cmd, void *arg)
337 {
338 static int virtual_mode = FALSE;
339 struct video_device *vd = video_devdata(file);
340 struct saa5249_device *t=vd->priv;
341
342 switch(cmd)
343 {
344 case VTXIOCGETINFO:
345 {
346 vtx_info_t *info = arg;
347 info->version_major = VTX_VER_MAJ;
348 info->version_minor = VTX_VER_MIN;
349 info->numpages = NUM_DAUS;
350 /*info->cct_type = CCT_TYPE;*/
351 return 0;
352 }
353
354 case VTXIOCCLRPAGE:
355 {
356 vtx_pagereq_t *req = arg;
357
358 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
359 return -EINVAL;
360 memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
361 t->vdau[req->pgbuf].clrfound = TRUE;
362 return 0;
363 }
364
365 case VTXIOCCLRFOUND:
366 {
367 vtx_pagereq_t *req = arg;
368
369 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
370 return -EINVAL;
371 t->vdau[req->pgbuf].clrfound = TRUE;
372 return 0;
373 }
374
375 case VTXIOCPAGEREQ:
376 {
377 vtx_pagereq_t *req = arg;
378 if (!(req->pagemask & PGMASK_PAGE))
379 req->page = 0;
380 if (!(req->pagemask & PGMASK_HOUR))
381 req->hour = 0;
382 if (!(req->pagemask & PGMASK_MINUTE))
383 req->minute = 0;
384 if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
385 return -EINVAL;
386 req->page &= 0x7ff;
387 if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
388 req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
389 return -EINVAL;
390 t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
391 t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
392 t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
393 t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
394 t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
395 t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
396 t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
397 t->vdau[req->pgbuf].stopped = FALSE;
398 t->vdau[req->pgbuf].clrfound = TRUE;
399 t->is_searching[req->pgbuf] = TRUE;
400 return 0;
401 }
402
403 case VTXIOCGETSTAT:
404 {
405 vtx_pagereq_t *req = arg;
406 u8 infobits[10];
407 vtx_pageinfo_t info;
408 int a;
409
410 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
411 return -EINVAL;
412 if (!t->vdau[req->pgbuf].stopped)
413 {
414 if (i2c_senddata(t, 2, 0, -1) ||
415 i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
416 i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
417 i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
418 i2c_senddata(t, 8, 0, 25, 0, -1))
419 return -EIO;
420 jdelay(PAGE_WAIT);
421 if (i2c_getdata(t, 10, infobits))
422 return -EIO;
423
424 if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) && /* check FOUND-bit */
425 (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
426 time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
427 { /* check if new page arrived */
428 if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
429 i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
430 return -EIO;
431 t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
432 memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
433 if (t->virtual_mode)
434 {
435 /* Packet X/24 */
436 if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
437 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
438 return -EIO;
439 /* Packet X/27/0 */
440 if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
441 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
442 return -EIO;
443 /* Packet 8/30/0...8/30/15
444 * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
445 * so we should undo this here.
446 */
447 if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
448 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
449 return -EIO;
450 }
451 t->vdau[req->pgbuf].clrfound = FALSE;
452 memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
453 }
454 else
455 {
456 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
457 }
458 }
459 else
460 {
461 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
462 }
463
464 info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
465 if (info.pagenum < 0x100)
466 info.pagenum += 0x800;
467 info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
468 info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
469 info.charset = ((infobits[7] >> 1) & 7);
470 info.delete = !!(infobits[3] & 8);
471 info.headline = !!(infobits[5] & 4);
472 info.subtitle = !!(infobits[5] & 8);
473 info.supp_header = !!(infobits[6] & 1);
474 info.update = !!(infobits[6] & 2);
475 info.inter_seq = !!(infobits[6] & 4);
476 info.dis_disp = !!(infobits[6] & 8);
477 info.serial = !!(infobits[7] & 1);
478 info.notfound = !!(infobits[8] & 0x10);
479 info.pblf = !!(infobits[9] & 0x20);
480 info.hamming = 0;
481 for (a = 0; a <= 7; a++)
482 {
483 if (infobits[a] & 0xf0)
484 {
485 info.hamming = 1;
486 break;
487 }
488 }
489 if (t->vdau[req->pgbuf].clrfound)
490 info.notfound = 1;
491 if(copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
492 return -EFAULT;
493 if (!info.hamming && !info.notfound)
494 {
495 t->is_searching[req->pgbuf] = FALSE;
496 }
497 return 0;
498 }
499
500 case VTXIOCGETPAGE:
501 {
502 vtx_pagereq_t *req = arg;
503 int start, end;
504
505 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
506 req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
507 return -EINVAL;
508 if(copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
509 return -EFAULT;
510
511 /*
512 * Always read the time directly from SAA5249
513 */
514
515 if (req->start <= 39 && req->end >= 32)
516 {
517 int len;
518 char buf[16];
519 start = max(req->start, 32);
520 end = min(req->end, 39);
521 len=end-start+1;
522 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
523 i2c_getdata(t, len, buf))
524 return -EIO;
525 if(copy_to_user(req->buffer+start-req->start, buf, len))
526 return -EFAULT;
527 }
528 /* Insert the current header if DAU is still searching for a page */
529 if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf])
530 {
531 char buf[32];
532 int len;
533 start = max(req->start, 7);
534 end = min(req->end, 31);
535 len=end-start+1;
536 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
537 i2c_getdata(t, len, buf))
538 return -EIO;
539 if(copy_to_user(req->buffer+start-req->start, buf, len))
540 return -EFAULT;
541 }
542 return 0;
543 }
544
545 case VTXIOCSTOPDAU:
546 {
547 vtx_pagereq_t *req = arg;
548
549 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
550 return -EINVAL;
551 t->vdau[req->pgbuf].stopped = TRUE;
552 t->is_searching[req->pgbuf] = FALSE;
553 return 0;
554 }
555
556 case VTXIOCPUTPAGE:
557 case VTXIOCSETDISP:
558 case VTXIOCPUTSTAT:
559 return 0;
560
561 case VTXIOCCLRCACHE:
562 {
563 if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
564 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',
565 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ', -1))
566 return -EIO;
567 if (i2c_senddata(t, 3, 0x20, -1))
568 return -EIO;
569 jdelay(10 * CLEAR_DELAY); /* I have no idea how long we have to wait here */
570 return 0;
571 }
572
573 case VTXIOCSETVIRT:
574 {
575 /* The SAA5249 has virtual-row reception turned on always */
576 t->virtual_mode = (int)(long)arg;
577 return 0;
578 }
579 }
580 return -EINVAL;
581 }
582
583 /*
584 * Translates old vtx IOCTLs to new ones
585 *
586 * This keeps new kernel versions compatible with old userspace programs.
587 */
588 static inline unsigned int vtx_fix_command(unsigned int cmd)
589 {
590 switch (cmd) {
591 case VTXIOCGETINFO_OLD:
592 cmd = VTXIOCGETINFO;
593 break;
594 case VTXIOCCLRPAGE_OLD:
595 cmd = VTXIOCCLRPAGE;
596 break;
597 case VTXIOCCLRFOUND_OLD:
598 cmd = VTXIOCCLRFOUND;
599 break;
600 case VTXIOCPAGEREQ_OLD:
601 cmd = VTXIOCPAGEREQ;
602 break;
603 case VTXIOCGETSTAT_OLD:
604 cmd = VTXIOCGETSTAT;
605 break;
606 case VTXIOCGETPAGE_OLD:
607 cmd = VTXIOCGETPAGE;
608 break;
609 case VTXIOCSTOPDAU_OLD:
610 cmd = VTXIOCSTOPDAU;
611 break;
612 case VTXIOCPUTPAGE_OLD:
613 cmd = VTXIOCPUTPAGE;
614 break;
615 case VTXIOCSETDISP_OLD:
616 cmd = VTXIOCSETDISP;
617 break;
618 case VTXIOCPUTSTAT_OLD:
619 cmd = VTXIOCPUTSTAT;
620 break;
621 case VTXIOCCLRCACHE_OLD:
622 cmd = VTXIOCCLRCACHE;
623 break;
624 case VTXIOCSETVIRT_OLD:
625 cmd = VTXIOCSETVIRT;
626 break;
627 }
628 return cmd;
629 }
630
631 /*
632 * Handle the locking
633 */
634
635 static int saa5249_ioctl(struct inode *inode, struct file *file,
636 unsigned int cmd, unsigned long arg)
637 {
638 struct video_device *vd = video_devdata(file);
639 struct saa5249_device *t=vd->priv;
640 int err;
641
642 cmd = vtx_fix_command(cmd);
643 down(&t->lock);
644 err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
645 up(&t->lock);
646 return err;
647 }
648
649 static int saa5249_open(struct inode *inode, struct file *file)
650 {
651 struct video_device *vd = video_devdata(file);
652 struct saa5249_device *t=vd->priv;
653 int err,pgbuf;
654
655 err = video_exclusive_open(inode,file);
656 if (err < 0)
657 return err;
658
659 if (t->client==NULL) {
660 err = -ENODEV;
661 goto fail;
662 }
663
664 if (i2c_senddata(t, 0, 0, -1) || /* Select R11 */
665 /* Turn off parity checks (we do this ourselves) */
666 i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
667 /* Display TV-picture, no virtual rows */
668 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 */
669
670 {
671 err = -EIO;
672 goto fail;
673 }
674
675 for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
676 {
677 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
678 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
679 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
680 t->vdau[pgbuf].expire = 0;
681 t->vdau[pgbuf].clrfound = TRUE;
682 t->vdau[pgbuf].stopped = TRUE;
683 t->is_searching[pgbuf] = FALSE;
684 }
685 t->virtual_mode=FALSE;
686 return 0;
687
688 fail:
689 video_exclusive_release(inode,file);
690 return err;
691 }
692
693
694
695 static int saa5249_release(struct inode *inode, struct file *file)
696 {
697 struct video_device *vd = video_devdata(file);
698 struct saa5249_device *t=vd->priv;
699 i2c_senddata(t, 1, 0x20, -1); /* Turn off CCT */
700 i2c_senddata(t, 5, 3, 3, -1); /* Turn off TV-display */
701 video_exclusive_release(inode,file);
702 return 0;
703 }
704
705 static int __init init_saa_5249 (void)
706 {
707 printk(KERN_INFO "SAA5249 driver (" IF_NAME " interface) for VideoText version %d.%d\n",
708 VTX_VER_MAJ, VTX_VER_MIN);
709 return i2c_add_driver(&i2c_driver_videotext);
710 }
711
712 static void __exit cleanup_saa_5249 (void)
713 {
714 i2c_del_driver(&i2c_driver_videotext);
715 }
716
717 module_init(init_saa_5249);
718 module_exit(cleanup_saa_5249);
719
720 static struct file_operations saa_fops = {
721 .owner = THIS_MODULE,
722 .open = saa5249_open,
723 .release = saa5249_release,
724 .ioctl = saa5249_ioctl,
725 .llseek = no_llseek,
726 };
727
728 static struct video_device saa_template =
729 {
730 .owner = THIS_MODULE,
731 .name = IF_NAME,
732 .type = VID_TYPE_TELETEXT, /*| VID_TYPE_TUNER ?? */
733 .hardware = VID_HARDWARE_SAA5249,
734 .fops = &saa_fops,
735 };
736
737 MODULE_LICENSE("GPL");
738
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