blob: fde99d9ee71f5716f7acdcefcc3625a3cc05c7e6 [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>
Mauro Carvalho Chehab5e87efa2006-06-05 10:26:32 -030059#include <media/v4l2-common.h>
Ingo Molnar3593cab2006-02-07 06:49:14 -020060#include <linux/mutex.h>
61
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
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
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -030075static const int disp_modes[8][3] =
Linus Torvalds1da177e2005-04-16 15:20:36 -070076{
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
Mauro Carvalho Chehab09df5cb2007-07-17 16:25:38 -030089#define PAGE_WAIT msecs_to_jiffies(300) /* Time between requesting page and */
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 /* checking status bits */
Mauro Carvalho Chehab09df5cb2007-07-17 16:25:38 -030091#define PGBUF_EXPIRE msecs_to_jiffies(15000) /* Time to wait before retransmitting */
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 /* page regardless of infobits */
93typedef 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
102struct 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;
Ingo Molnar3593cab2006-02-07 06:49:14 -0200111 struct mutex lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112};
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 */
Mauro Carvalho Chehab09df5cb2007-07-17 16:25:38 -0300118#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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120#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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127#define RESCHED do { cond_resched(); } while(0)
128
129static struct video_device saa_template; /* Declared near bottom */
130
131/* Addresses to scan */
132static unsigned short normal_i2c[] = {34>>1,I2C_CLIENT_END};
Hans Verkuilf87086e2008-07-18 00:50:58 -0300133
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134I2C_CLIENT_INSMOD;
135
136static struct i2c_client client_template;
137
138static int saa5249_attach(struct i2c_adapter *adap, int addr, int kind)
139{
140 int pgbuf;
141 int err;
142 struct i2c_client *client;
143 struct video_device *vd;
144 struct saa5249_device *t;
145
146 printk(KERN_INFO "saa5249: teletext chip found.\n");
147 client=kmalloc(sizeof(*client), GFP_KERNEL);
148 if(client==NULL)
149 return -ENOMEM;
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300150 client_template.adapter = adap;
151 client_template.addr = addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 memcpy(client, &client_template, sizeof(*client));
Panagiotis Issaris74081872006-01-11 19:40:56 -0200153 t = kzalloc(sizeof(*t), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 if(t==NULL)
155 {
156 kfree(client);
157 return -ENOMEM;
158 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
Ingo Molnar3593cab2006-02-07 06:49:14 -0200160 mutex_init(&t->lock);
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 /*
163 * Now create a video4linux device
164 */
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300165
Panagiotis Issaris74081872006-01-11 19:40:56 -0200166 vd = kmalloc(sizeof(struct video_device), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 if(vd==NULL)
168 {
169 kfree(t);
170 kfree(client);
171 return -ENOMEM;
172 }
173 i2c_set_clientdata(client, vd);
174 memcpy(vd, &saa_template, sizeof(*vd));
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300175
176 for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 {
178 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
179 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
180 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
181 t->vdau[pgbuf].expire = 0;
Richard Knutssone8be02a2007-02-06 21:52:04 -0300182 t->vdau[pgbuf].clrfound = true;
183 t->vdau[pgbuf].stopped = true;
184 t->is_searching[pgbuf] = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 }
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300186 vd->priv=t;
187
188
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 /*
190 * Register it
191 */
192
193 if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
194 {
195 kfree(t);
196 kfree(vd);
197 kfree(client);
198 return err;
199 }
200 t->client = client;
201 i2c_attach_client(client);
202 return 0;
203}
204
205/*
206 * We do most of the hard work when we become a device on the i2c.
207 */
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300208
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209static int saa5249_probe(struct i2c_adapter *adap)
210{
211 if (adap->class & I2C_CLASS_TV_ANALOG)
212 return i2c_probe(adap, &addr_data, saa5249_attach);
213 return 0;
214}
215
216static int saa5249_detach(struct i2c_client *client)
217{
218 struct video_device *vd = i2c_get_clientdata(client);
219 i2c_detach_client(client);
220 video_unregister_device(vd);
221 kfree(vd->priv);
222 kfree(vd);
223 kfree(client);
224 return 0;
225}
226
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227/* new I2C driver support */
228
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300229static struct i2c_driver i2c_driver_videotext =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230{
Laurent Riffard604f28e2005-11-26 20:43:39 +0100231 .driver = {
Laurent Riffard604f28e2005-11-26 20:43:39 +0100232 .name = IF_NAME, /* name */
233 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 .id = I2C_DRIVERID_SAA5249, /* in i2c.h */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 .attach_adapter = saa5249_probe,
236 .detach_client = saa5249_detach,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237};
238
239static struct i2c_client client_template = {
240 .driver = &i2c_driver_videotext,
241 .name = "(unset)",
242};
243
244/*
245 * Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
246 * delay may be longer.
247 */
248
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300249static void jdelay(unsigned long delay)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250{
251 sigset_t oldblocked = current->blocked;
252
253 spin_lock_irq(&current->sighand->siglock);
254 sigfillset(&current->blocked);
255 recalc_sigpending();
256 spin_unlock_irq(&current->sighand->siglock);
257 msleep_interruptible(jiffies_to_msecs(delay));
258
259 spin_lock_irq(&current->sighand->siglock);
260 current->blocked = oldblocked;
261 recalc_sigpending();
262 spin_unlock_irq(&current->sighand->siglock);
263}
264
265
266/*
267 * I2C interfaces
268 */
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300269
270static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271{
272 char buf[64];
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 buf[0] = reg;
275 memcpy(buf+1, data, count);
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300276
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 if(i2c_master_send(t->client, buf, count+1)==count+1)
278 return 0;
279 return -1;
280}
281
282static int i2c_senddata(struct saa5249_device *t, ...)
283{
284 unsigned char buf[64];
285 int v;
Richard Knutssonb730a812007-11-27 06:59:37 -0300286 int ct = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 va_list argp;
288 va_start(argp,t);
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300289
Richard Knutssonb730a812007-11-27 06:59:37 -0300290 while ((v = va_arg(argp, int)) != -1)
291 buf[ct++] = v;
292
293 va_end(argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 return i2c_sendbuf(t, buf[0], ct-1, buf+1);
295}
296
Marcin Garskidb955172007-10-19 23:22:11 +0200297/* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 * handshaking is done by this routine, ack will be sent after the last byte to inhibit further
Richard Knutssone8be02a2007-02-06 21:52:04 -0300299 * sending of data. If uaccess is 'true', data is written to user-space with put_user.
Marcin Garskidb955172007-10-19 23:22:11 +0200300 * Returns -1 if I²C-device didn't send acknowledge, 0 otherwise
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 */
302
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300303static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304{
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
315static int do_saa5249_ioctl(struct inode *inode, struct file *file,
316 unsigned int cmd, void *arg)
317{
Richard Knutssone8be02a2007-02-06 21:52:04 -0300318 static int virtual_mode = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 struct video_device *vd = video_devdata(file);
320 struct saa5249_device *t=vd->priv;
321
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300322 switch(cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 {
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300324 case VTXIOCGETINFO:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 {
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
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300334 case VTXIOCCLRPAGE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 {
336 vtx_pagereq_t *req = arg;
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300337
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
339 return -EINVAL;
340 memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
Richard Knutssone8be02a2007-02-06 21:52:04 -0300341 t->vdau[req->pgbuf].clrfound = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 return 0;
343 }
344
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300345 case VTXIOCCLRFOUND:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 {
347 vtx_pagereq_t *req = arg;
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300348
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
350 return -EINVAL;
Richard Knutssone8be02a2007-02-06 21:52:04 -0300351 t->vdau[req->pgbuf].clrfound = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 return 0;
353 }
354
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300355 case VTXIOCPAGEREQ:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 {
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);
Richard Knutssone8be02a2007-02-06 21:52:04 -0300377 t->vdau[req->pgbuf].stopped = false;
378 t->vdau[req->pgbuf].clrfound = true;
379 t->is_searching[req->pgbuf] = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 return 0;
381 }
382
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300383 case VTXIOCGETSTAT:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 {
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;
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300392 if (!t->vdau[req->pgbuf].stopped)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 {
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 */
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300405 (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 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);
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300413 if (t->virtual_mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 {
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 }
Richard Knutssone8be02a2007-02-06 21:52:04 -0300431 t->vdau[req->pgbuf].clrfound = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 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;
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300461 for (a = 0; a <= 7; a++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 {
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300463 if (infobits[a] & 0xf0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 {
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;
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300473 if (!info.hamming && !info.notfound)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 {
Richard Knutssone8be02a2007-02-06 21:52:04 -0300475 t->is_searching[req->pgbuf] = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 }
477 return 0;
478 }
479
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300480 case VTXIOCGETPAGE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 {
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;
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300490
491 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 * Always read the time directly from SAA5249
493 */
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300494
495 if (req->start <= 39 && req->end >= 32)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 {
497 int len;
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300498 char buf[16];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 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 */
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300509 if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 {
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
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300525 case VTXIOCSTOPDAU:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 {
527 vtx_pagereq_t *req = arg;
528
529 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
530 return -EINVAL;
Richard Knutssone8be02a2007-02-06 21:52:04 -0300531 t->vdau[req->pgbuf].stopped = true;
532 t->is_searching[req->pgbuf] = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 return 0;
534 }
535
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300536 case VTXIOCPUTPAGE:
537 case VTXIOCSETDISP:
538 case VTXIOCPUTSTAT:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 return 0;
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300540
541 case VTXIOCCLRCACHE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 {
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
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300553 case VTXIOCSETVIRT:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 {
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 */
568static 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 */
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300614
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615static int saa5249_ioctl(struct inode *inode, struct file *file,
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300616 unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617{
618 struct video_device *vd = video_devdata(file);
619 struct saa5249_device *t=vd->priv;
620 int err;
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300621
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 cmd = vtx_fix_command(cmd);
Ingo Molnar3593cab2006-02-07 06:49:14 -0200623 mutex_lock(&t->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
Ingo Molnar3593cab2006-02-07 06:49:14 -0200625 mutex_unlock(&t->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 return err;
627}
628
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300629static int saa5249_open(struct inode *inode, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630{
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;
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300638
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 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 */
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300649
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 {
651 err = -EIO;
652 goto fail;
653 }
654
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300655 for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 {
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;
Richard Knutssone8be02a2007-02-06 21:52:04 -0300661 t->vdau[pgbuf].clrfound = true;
662 t->vdau[pgbuf].stopped = true;
663 t->is_searching[pgbuf] = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 }
Richard Knutssone8be02a2007-02-06 21:52:04 -0300665 t->virtual_mode = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 return 0;
667
668 fail:
669 video_exclusive_release(inode,file);
670 return err;
671}
672
673
674
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300675static int saa5249_release(struct inode *inode, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676{
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
685static 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
Mauro Carvalho Chehabd56410e2006-03-25 09:19:53 -0300692static void __exit cleanup_saa_5249 (void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693{
694 i2c_del_driver(&i2c_driver_videotext);
695}
696
697module_init(init_saa_5249);
698module_exit(cleanup_saa_5249);
699
Arjan van de Venfa027c22007-02-12 00:55:33 -0800700static const struct file_operations saa_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 .owner = THIS_MODULE,
702 .open = saa5249_open,
703 .release = saa5249_release,
704 .ioctl = saa5249_ioctl,
Douglas Schilling Landgraf078ff792008-04-22 14:46:11 -0300705#ifdef CONFIG_COMPAT
Arnd Bergmann0d0fbf82006-01-09 15:24:57 -0200706 .compat_ioctl = v4l_compat_ioctl32,
Douglas Schilling Landgraf078ff792008-04-22 14:46:11 -0300707#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 .llseek = no_llseek,
709};
710
711static struct video_device saa_template =
712{
713 .owner = THIS_MODULE,
714 .name = IF_NAME,
715 .type = VID_TYPE_TELETEXT, /*| VID_TYPE_TUNER ?? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 .fops = &saa_fops,
717};
718
719MODULE_LICENSE("GPL");