aboutsummaryrefslogtreecommitdiff
path: root/drivers/media/video/saa5249.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/video/saa5249.c')
-rw-r--r--drivers/media/video/saa5249.c725
1 files changed, 725 insertions, 0 deletions
diff --git a/drivers/media/video/saa5249.c b/drivers/media/video/saa5249.c
new file mode 100644
index 00000000000..d74caa139f0
--- /dev/null
+++ b/drivers/media/video/saa5249.c
@@ -0,0 +1,725 @@
+/*
+ * Modified in order to keep it compatible both with new and old videotext IOCTLs by
+ * Michael Geng <linux@MichaelGeng.de>
+ *
+ * Cleaned up to use existing videodev interface and allow the idea
+ * of multiple teletext decoders on the video4linux iface. Changed i2c
+ * to cover addressing clashes on device busses. It's also rebuilt so
+ * you can add arbitary multiple teletext devices to Linux video4linux
+ * now (well 32 anyway).
+ *
+ * Alan Cox <Alan.Cox@linux.org>
+ *
+ * The original driver was heavily modified to match the i2c interface
+ * It was truncated to use the WinTV boards, too.
+ *
+ * Copyright (c) 1998 Richard Guenther <richard.guenther@student.uni-tuebingen.de>
+ *
+ * $Id: saa5249.c,v 1.1 1998/03/30 22:23:23 alan Exp $
+ *
+ * Derived From
+ *
+ * vtx.c:
+ * This is a loadable character-device-driver for videotext-interfaces
+ * (aka teletext). Please check the Makefile/README for a list of supported
+ * interfaces.
+ *
+ * Copyright (c) 1994-97 Martin Buck <martin-2.buck@student.uni-ulm.de>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <stdarg.h>
+#include <linux/i2c.h>
+#include <linux/videotext.h>
+#include <linux/videodev.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#define VTX_VER_MAJ 1
+#define VTX_VER_MIN 8
+
+
+
+#define NUM_DAUS 4
+#define NUM_BUFS 8
+#define IF_NAME "SAA5249"
+
+static const int disp_modes[8][3] =
+{
+ { 0x46, 0x03, 0x03 }, /* DISPOFF */
+ { 0x46, 0xcc, 0xcc }, /* DISPNORM */
+ { 0x44, 0x0f, 0x0f }, /* DISPTRANS */
+ { 0x46, 0xcc, 0x46 }, /* DISPINS */
+ { 0x44, 0x03, 0x03 }, /* DISPOFF, interlaced */
+ { 0x44, 0xcc, 0xcc }, /* DISPNORM, interlaced */
+ { 0x44, 0x0f, 0x0f }, /* DISPTRANS, interlaced */
+ { 0x44, 0xcc, 0x46 } /* DISPINS, interlaced */
+};
+
+
+
+#define PAGE_WAIT (300*HZ/1000) /* Time between requesting page and */
+ /* checking status bits */
+#define PGBUF_EXPIRE (15*HZ) /* Time to wait before retransmitting */
+ /* page regardless of infobits */
+typedef struct {
+ u8 pgbuf[VTX_VIRTUALSIZE]; /* Page-buffer */
+ u8 laststat[10]; /* Last value of infobits for DAU */
+ u8 sregs[7]; /* Page-request registers */
+ unsigned long expire; /* Time when page will be expired */
+ unsigned clrfound : 1; /* VTXIOCCLRFOUND has been called */
+ unsigned stopped : 1; /* VTXIOCSTOPDAU has been called */
+} vdau_t;
+
+struct saa5249_device
+{
+ vdau_t vdau[NUM_DAUS]; /* Data for virtual DAUs (the 5249 only has one */
+ /* real DAU, so we have to simulate some more) */
+ int vtx_use_count;
+ int is_searching[NUM_DAUS];
+ int disp_mode;
+ int virtual_mode;
+ struct i2c_client *client;
+ struct semaphore lock;
+};
+
+
+#define CCTWR 34 /* I²C write/read-address of vtx-chip */
+#define CCTRD 35
+#define NOACK_REPEAT 10 /* Retry access this many times on failure */
+#define CLEAR_DELAY (HZ/20) /* Time required to clear a page */
+#define READY_TIMEOUT (30*HZ/1000) /* Time to wait for ready signal of I²C-bus interface */
+#define INIT_DELAY 500 /* Time in usec to wait at initialization of CEA interface */
+#define START_DELAY 10 /* Time in usec to wait before starting write-cycle (CEA) */
+
+#define VTX_DEV_MINOR 0
+
+/* General defines and debugging support */
+
+#ifndef FALSE
+#define FALSE 0
+#define TRUE 1
+#endif
+
+#define RESCHED do { cond_resched(); } while(0)
+
+static struct video_device saa_template; /* Declared near bottom */
+
+/* Addresses to scan */
+static unsigned short normal_i2c[] = {34>>1,I2C_CLIENT_END};
+static unsigned short normal_i2c_range[] = {I2C_CLIENT_END};
+I2C_CLIENT_INSMOD;
+
+static struct i2c_client client_template;
+
+static int saa5249_attach(struct i2c_adapter *adap, int addr, int kind)
+{
+ int pgbuf;
+ int err;
+ struct i2c_client *client;
+ struct video_device *vd;
+ struct saa5249_device *t;
+
+ printk(KERN_INFO "saa5249: teletext chip found.\n");
+ client=kmalloc(sizeof(*client), GFP_KERNEL);
+ if(client==NULL)
+ return -ENOMEM;
+ client_template.adapter = adap;
+ client_template.addr = addr;
+ memcpy(client, &client_template, sizeof(*client));
+ t = kmalloc(sizeof(*t), GFP_KERNEL);
+ if(t==NULL)
+ {
+ kfree(client);
+ return -ENOMEM;
+ }
+ memset(t, 0, sizeof(*t));
+ strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
+ init_MUTEX(&t->lock);
+
+ /*
+ * Now create a video4linux device
+ */
+
+ vd = (struct video_device *)kmalloc(sizeof(struct video_device), GFP_KERNEL);
+ if(vd==NULL)
+ {
+ kfree(t);
+ kfree(client);
+ return -ENOMEM;
+ }
+ i2c_set_clientdata(client, vd);
+ memcpy(vd, &saa_template, sizeof(*vd));
+
+ for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
+ {
+ memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
+ memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
+ memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
+ t->vdau[pgbuf].expire = 0;
+ t->vdau[pgbuf].clrfound = TRUE;
+ t->vdau[pgbuf].stopped = TRUE;
+ t->is_searching[pgbuf] = FALSE;
+ }
+ vd->priv=t;
+
+
+ /*
+ * Register it
+ */
+
+ if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
+ {
+ kfree(t);
+ kfree(vd);
+ kfree(client);
+ return err;
+ }
+ t->client = client;
+ i2c_attach_client(client);
+ return 0;
+}
+
+/*
+ * We do most of the hard work when we become a device on the i2c.
+ */
+
+static int saa5249_probe(struct i2c_adapter *adap)
+{
+ if (adap->class & I2C_CLASS_TV_ANALOG)
+ return i2c_probe(adap, &addr_data, saa5249_attach);
+ return 0;
+}
+
+static int saa5249_detach(struct i2c_client *client)
+{
+ struct video_device *vd = i2c_get_clientdata(client);
+ i2c_detach_client(client);
+ video_unregister_device(vd);
+ kfree(vd->priv);
+ kfree(vd);
+ kfree(client);
+ return 0;
+}
+
+static int saa5249_command(struct i2c_client *device,
+ unsigned int cmd, void *arg)
+{
+ return -EINVAL;
+}
+
+/* new I2C driver support */
+
+static struct i2c_driver i2c_driver_videotext =
+{
+ .owner = THIS_MODULE,
+ .name = IF_NAME, /* name */
+ .id = I2C_DRIVERID_SAA5249, /* in i2c.h */
+ .flags = I2C_DF_NOTIFY,
+ .attach_adapter = saa5249_probe,
+ .detach_client = saa5249_detach,
+ .command = saa5249_command
+};
+
+static struct i2c_client client_template = {
+ .driver = &i2c_driver_videotext,
+ .name = "(unset)",
+};
+
+/*
+ * Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
+ * delay may be longer.
+ */
+
+static void jdelay(unsigned long delay)
+{
+ sigset_t oldblocked = current->blocked;
+
+ spin_lock_irq(&current->sighand->siglock);
+ sigfillset(&current->blocked);
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+ msleep_interruptible(jiffies_to_msecs(delay));
+
+ spin_lock_irq(&current->sighand->siglock);
+ current->blocked = oldblocked;
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+}
+
+
+/*
+ * I2C interfaces
+ */
+
+static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data)
+{
+ char buf[64];
+
+ buf[0] = reg;
+ memcpy(buf+1, data, count);
+
+ if(i2c_master_send(t->client, buf, count+1)==count+1)
+ return 0;
+ return -1;
+}
+
+static int i2c_senddata(struct saa5249_device *t, ...)
+{
+ unsigned char buf[64];
+ int v;
+ int ct=0;
+ va_list argp;
+ va_start(argp,t);
+
+ while((v=va_arg(argp,int))!=-1)
+ buf[ct++]=v;
+ return i2c_sendbuf(t, buf[0], ct-1, buf+1);
+}
+
+/* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop
+ * handshaking is done by this routine, ack will be sent after the last byte to inhibit further
+ * sending of data. If uaccess is TRUE, data is written to user-space with put_user.
+ * Returns -1 if I²C-device didn't send acknowledge, 0 otherwise
+ */
+
+static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf)
+{
+ if(i2c_master_recv(t->client, buf, count)!=count)
+ return -1;
+ return 0;
+}
+
+
+/*
+ * Standard character-device-driver functions
+ */
+
+static int do_saa5249_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, void *arg)
+{
+ static int virtual_mode = FALSE;
+ struct video_device *vd = video_devdata(file);
+ struct saa5249_device *t=vd->priv;
+
+ switch(cmd)
+ {
+ case VTXIOCGETINFO:
+ {
+ vtx_info_t *info = arg;
+ info->version_major = VTX_VER_MAJ;
+ info->version_minor = VTX_VER_MIN;
+ info->numpages = NUM_DAUS;
+ /*info->cct_type = CCT_TYPE;*/
+ return 0;
+ }
+
+ case VTXIOCCLRPAGE:
+ {
+ vtx_pagereq_t *req = arg;
+
+ if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
+ return -EINVAL;
+ memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
+ t->vdau[req->pgbuf].clrfound = TRUE;
+ return 0;
+ }
+
+ case VTXIOCCLRFOUND:
+ {
+ vtx_pagereq_t *req = arg;
+
+ if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
+ return -EINVAL;
+ t->vdau[req->pgbuf].clrfound = TRUE;
+ return 0;
+ }
+
+ case VTXIOCPAGEREQ:
+ {
+ vtx_pagereq_t *req = arg;
+ if (!(req->pagemask & PGMASK_PAGE))
+ req->page = 0;
+ if (!(req->pagemask & PGMASK_HOUR))
+ req->hour = 0;
+ if (!(req->pagemask & PGMASK_MINUTE))
+ req->minute = 0;
+ if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
+ return -EINVAL;
+ req->page &= 0x7ff;
+ if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
+ req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
+ return -EINVAL;
+ t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
+ t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
+ t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
+ t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
+ t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
+ t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
+ t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
+ t->vdau[req->pgbuf].stopped = FALSE;
+ t->vdau[req->pgbuf].clrfound = TRUE;
+ t->is_searching[req->pgbuf] = TRUE;
+ return 0;
+ }
+
+ case VTXIOCGETSTAT:
+ {
+ vtx_pagereq_t *req = arg;
+ u8 infobits[10];
+ vtx_pageinfo_t info;
+ int a;
+
+ if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
+ return -EINVAL;
+ if (!t->vdau[req->pgbuf].stopped)
+ {
+ if (i2c_senddata(t, 2, 0, -1) ||
+ i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
+ i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
+ i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
+ i2c_senddata(t, 8, 0, 25, 0, -1))
+ return -EIO;
+ jdelay(PAGE_WAIT);
+ if (i2c_getdata(t, 10, infobits))
+ return -EIO;
+
+ if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) && /* check FOUND-bit */
+ (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
+ time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
+ { /* check if new page arrived */
+ if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
+ i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
+ return -EIO;
+ t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
+ memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
+ if (t->virtual_mode)
+ {
+ /* Packet X/24 */
+ if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
+ i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
+ return -EIO;
+ /* Packet X/27/0 */
+ if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
+ i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
+ return -EIO;
+ /* Packet 8/30/0...8/30/15
+ * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
+ * so we should undo this here.
+ */
+ if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
+ i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
+ return -EIO;
+ }
+ t->vdau[req->pgbuf].clrfound = FALSE;
+ memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
+ }
+ else
+ {
+ memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
+ }
+ }
+ else
+ {
+ memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
+ }
+
+ info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
+ if (info.pagenum < 0x100)
+ info.pagenum += 0x800;
+ info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
+ info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
+ info.charset = ((infobits[7] >> 1) & 7);
+ info.delete = !!(infobits[3] & 8);
+ info.headline = !!(infobits[5] & 4);
+ info.subtitle = !!(infobits[5] & 8);
+ info.supp_header = !!(infobits[6] & 1);
+ info.update = !!(infobits[6] & 2);
+ info.inter_seq = !!(infobits[6] & 4);
+ info.dis_disp = !!(infobits[6] & 8);
+ info.serial = !!(infobits[7] & 1);
+ info.notfound = !!(infobits[8] & 0x10);
+ info.pblf = !!(infobits[9] & 0x20);
+ info.hamming = 0;
+ for (a = 0; a <= 7; a++)
+ {
+ if (infobits[a] & 0xf0)
+ {
+ info.hamming = 1;
+ break;
+ }
+ }
+ if (t->vdau[req->pgbuf].clrfound)
+ info.notfound = 1;
+ if(copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
+ return -EFAULT;
+ if (!info.hamming && !info.notfound)
+ {
+ t->is_searching[req->pgbuf] = FALSE;
+ }
+ return 0;
+ }
+
+ case VTXIOCGETPAGE:
+ {
+ vtx_pagereq_t *req = arg;
+ int start, end;
+
+ if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
+ req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
+ return -EINVAL;
+ if(copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
+ return -EFAULT;
+
+ /*
+ * Always read the time directly from SAA5249
+ */
+
+ if (req->start <= 39 && req->end >= 32)
+ {
+ int len;
+ char buf[16];
+ start = max(req->start, 32);
+ end = min(req->end, 39);
+ len=end-start+1;
+ if (i2c_senddata(t, 8, 0, 0, start, -1) ||
+ i2c_getdata(t, len, buf))
+ return -EIO;
+ if(copy_to_user(req->buffer+start-req->start, buf, len))
+ return -EFAULT;
+ }
+ /* Insert the current header if DAU is still searching for a page */
+ if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf])
+ {
+ char buf[32];
+ int len;
+ start = max(req->start, 7);
+ end = min(req->end, 31);
+ len=end-start+1;
+ if (i2c_senddata(t, 8, 0, 0, start, -1) ||
+ i2c_getdata(t, len, buf))
+ return -EIO;
+ if(copy_to_user(req->buffer+start-req->start, buf, len))
+ return -EFAULT;
+ }
+ return 0;
+ }
+
+ case VTXIOCSTOPDAU:
+ {
+ vtx_pagereq_t *req = arg;
+
+ if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
+ return -EINVAL;
+ t->vdau[req->pgbuf].stopped = TRUE;
+ t->is_searching[req->pgbuf] = FALSE;
+ return 0;
+ }
+
+ case VTXIOCPUTPAGE:
+ case VTXIOCSETDISP:
+ case VTXIOCPUTSTAT:
+ return 0;
+
+ case VTXIOCCLRCACHE:
+ {
+ if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
+ ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',
+ ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ', -1))
+ return -EIO;
+ if (i2c_senddata(t, 3, 0x20, -1))
+ return -EIO;
+ jdelay(10 * CLEAR_DELAY); /* I have no idea how long we have to wait here */
+ return 0;
+ }
+
+ case VTXIOCSETVIRT:
+ {
+ /* The SAA5249 has virtual-row reception turned on always */
+ t->virtual_mode = (int)(long)arg;
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+
+/*
+ * Translates old vtx IOCTLs to new ones
+ *
+ * This keeps new kernel versions compatible with old userspace programs.
+ */
+static inline unsigned int vtx_fix_command(unsigned int cmd)
+{
+ switch (cmd) {
+ case VTXIOCGETINFO_OLD:
+ cmd = VTXIOCGETINFO;
+ break;
+ case VTXIOCCLRPAGE_OLD:
+ cmd = VTXIOCCLRPAGE;
+ break;
+ case VTXIOCCLRFOUND_OLD:
+ cmd = VTXIOCCLRFOUND;
+ break;
+ case VTXIOCPAGEREQ_OLD:
+ cmd = VTXIOCPAGEREQ;
+ break;
+ case VTXIOCGETSTAT_OLD:
+ cmd = VTXIOCGETSTAT;
+ break;
+ case VTXIOCGETPAGE_OLD:
+ cmd = VTXIOCGETPAGE;
+ break;
+ case VTXIOCSTOPDAU_OLD:
+ cmd = VTXIOCSTOPDAU;
+ break;
+ case VTXIOCPUTPAGE_OLD:
+ cmd = VTXIOCPUTPAGE;
+ break;
+ case VTXIOCSETDISP_OLD:
+ cmd = VTXIOCSETDISP;
+ break;
+ case VTXIOCPUTSTAT_OLD:
+ cmd = VTXIOCPUTSTAT;
+ break;
+ case VTXIOCCLRCACHE_OLD:
+ cmd = VTXIOCCLRCACHE;
+ break;
+ case VTXIOCSETVIRT_OLD:
+ cmd = VTXIOCSETVIRT;
+ break;
+ }
+ return cmd;
+}
+
+/*
+ * Handle the locking
+ */
+
+static int saa5249_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct video_device *vd = video_devdata(file);
+ struct saa5249_device *t=vd->priv;
+ int err;
+
+ cmd = vtx_fix_command(cmd);
+ down(&t->lock);
+ err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
+ up(&t->lock);
+ return err;
+}
+
+static int saa5249_open(struct inode *inode, struct file *file)
+{
+ struct video_device *vd = video_devdata(file);
+ struct saa5249_device *t=vd->priv;
+ int err,pgbuf;
+
+ err = video_exclusive_open(inode,file);
+ if (err < 0)
+ return err;
+
+ if (t->client==NULL) {
+ err = -ENODEV;
+ goto fail;
+ }
+
+ if (i2c_senddata(t, 0, 0, -1) || /* Select R11 */
+ /* Turn off parity checks (we do this ourselves) */
+ i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
+ /* Display TV-picture, no virtual rows */
+ 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 */
+
+ {
+ err = -EIO;
+ goto fail;
+ }
+
+ for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
+ {
+ memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
+ memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
+ memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
+ t->vdau[pgbuf].expire = 0;
+ t->vdau[pgbuf].clrfound = TRUE;
+ t->vdau[pgbuf].stopped = TRUE;
+ t->is_searching[pgbuf] = FALSE;
+ }
+ t->virtual_mode=FALSE;
+ return 0;
+
+ fail:
+ video_exclusive_release(inode,file);
+ return err;
+}
+
+
+
+static int saa5249_release(struct inode *inode, struct file *file)
+{
+ struct video_device *vd = video_devdata(file);
+ struct saa5249_device *t=vd->priv;
+ i2c_senddata(t, 1, 0x20, -1); /* Turn off CCT */
+ i2c_senddata(t, 5, 3, 3, -1); /* Turn off TV-display */
+ video_exclusive_release(inode,file);
+ return 0;
+}
+
+static int __init init_saa_5249 (void)
+{
+ printk(KERN_INFO "SAA5249 driver (" IF_NAME " interface) for VideoText version %d.%d\n",
+ VTX_VER_MAJ, VTX_VER_MIN);
+ return i2c_add_driver(&i2c_driver_videotext);
+}
+
+static void __exit cleanup_saa_5249 (void)
+{
+ i2c_del_driver(&i2c_driver_videotext);
+}
+
+module_init(init_saa_5249);
+module_exit(cleanup_saa_5249);
+
+static struct file_operations saa_fops = {
+ .owner = THIS_MODULE,
+ .open = saa5249_open,
+ .release = saa5249_release,
+ .ioctl = saa5249_ioctl,
+ .llseek = no_llseek,
+};
+
+static struct video_device saa_template =
+{
+ .owner = THIS_MODULE,
+ .name = IF_NAME,
+ .type = VID_TYPE_TELETEXT, /*| VID_TYPE_TUNER ?? */
+ .hardware = VID_HARDWARE_SAA5249,
+ .fops = &saa_fops,
+};
+
+MODULE_LICENSE("GPL");