V4L/DVB (8944): saa5249: convert i2c driver for new i2c API
authorHans Verkuil <hverkuil@xs4all.nl>
Sun, 7 Sep 2008 11:31:38 +0000 (08:31 -0300)
committerMauro Carvalho Chehab <mchehab@redhat.com>
Sun, 12 Oct 2008 11:37:00 +0000 (09:37 -0200)
- Convert to use v4l2-i2c-drv-legacy.h to be able to handle the new i2c API
- Cleanups
- Use v4l_dbg/v4l_info to have uniform kernel messages

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
drivers/media/video/saa5249.c

index 8517aa4..421071c 100644 (file)
@@ -15,8 +15,6 @@
  *
  *     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:
 
 #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 <linux/smp_lock.h>
-#include <stdarg.h>
 #include <linux/i2c.h>
+#include <linux/smp_lock.h>
+#include <linux/mutex.h>
 #include <linux/videotext.h>
 #include <linux/videodev.h>
 #include <media/v4l2-common.h>
 #include <media/v4l2-ioctl.h>
-#include <linux/mutex.h>
-
+#include <media/v4l2-i2c-drv-legacy.h>
 
-#include <asm/io.h>
-#include <asm/uaccess.h>
+MODULE_AUTHOR("Michael Geng <linux@MichaelGeng.de>");
+MODULE_DESCRIPTION("Philips SAA5249 Teletext decoder driver");
+MODULE_LICENSE("GPL");
 
 #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] =
 {
@@ -125,125 +116,8 @@ struct saa5249_device
 
 #define VTX_DEV_MINOR 0
 
-/* General defines and debugging support */
-
-#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};
-
-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 = kzalloc(sizeof(*t), GFP_KERNEL);
-       if(t==NULL)
-       {
-               kfree(client);
-               return -ENOMEM;
-       }
-       strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
-       mutex_init(&t->lock);
-
-       /*
-        *      Now create a video4linux device
-        */
-
-       vd = 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;
-       }
-       video_set_drvdata(vd, 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(video_get_drvdata(vd));
-       kfree(vd);
-       kfree(client);
-       return 0;
-}
-
-/* new I2C driver support */
-
-static struct i2c_driver i2c_driver_videotext =
-{
-       .driver = {
-               .name   = IF_NAME,              /* name */
-       },
-       .id             = I2C_DRIVERID_SAA5249, /* in i2c.h */
-       .attach_adapter = saa5249_probe,
-       .detach_client  = saa5249_detach,
-};
-
-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.
@@ -277,7 +151,7 @@ static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data)
        buf[0] = reg;
        memcpy(buf+1, data, count);
 
-       if(i2c_master_send(t->client, buf, count+1)==count+1)
+       if (i2c_master_send(t->client, buf, count + 1) == count + 1)
                return 0;
        return -1;
 }
@@ -321,243 +195,234 @@ static int do_saa5249_ioctl(struct inode *inode, struct file *file,
        static int virtual_mode = false;
        struct saa5249_device *t = video_drvdata(file);
 
-       switch(cmd)
+       switch (cmd) {
+       case VTXIOCGETINFO:
        {
-               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;
-               }
+               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;
+       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;
-               }
+               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;
+       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;
-               }
+               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 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;
+       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))
+                       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].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
-                       {
+                               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;
+               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;
                        }
-                       return 0;
                }
+               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))
+       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;
-
-                        /*
-                         *     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;
                }
+               return 0;
+       }
 
-               case VTXIOCSTOPDAU:
-               {
-                       vtx_pagereq_t *req = arg;
+       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;
-               }
+               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 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 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;
-               }
+       case VTXIOCSETVIRT:
+       {
+               /* The SAA5249 has virtual-row reception turned on always */
+               t->virtual_mode = (int)(long)arg;
+               return 0;
+       }
        }
        return -EINVAL;
 }
@@ -674,21 +539,6 @@ static int saa5249_release(struct inode *inode, struct file *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 const struct file_operations saa_fops = {
        .owner          = THIS_MODULE,
        .open           = saa5249_open,
@@ -702,9 +552,84 @@ static const struct file_operations saa_fops = {
 
 static struct video_device saa_template =
 {
-       .name           = IF_NAME,
+       .name           = "saa5249",
        .fops           = &saa_fops,
        .release        = video_device_release,
 };
 
-MODULE_LICENSE("GPL");
+/* Addresses to scan */
+static unsigned short normal_i2c[] = { 0x22 >> 1, I2C_CLIENT_END };
+
+I2C_CLIENT_INSMOD;
+
+static int saa5249_probe(struct i2c_client *client,
+                       const struct i2c_device_id *id)
+{
+       int pgbuf;
+       int err;
+       struct video_device *vd;
+       struct saa5249_device *t;
+
+       v4l_info(client, "chip found @ 0x%x (%s)\n",
+                       client->addr << 1, client->adapter->name);
+       v4l_info(client, "VideoText version %d.%d\n",
+                       VTX_VER_MAJ, VTX_VER_MIN);
+       t = kzalloc(sizeof(*t), GFP_KERNEL);
+       if (t == NULL)
+               return -ENOMEM;
+       mutex_init(&t->lock);
+
+       /* Now create a video4linux device */
+       vd = kmalloc(sizeof(struct video_device), GFP_KERNEL);
+       if (vd == NULL) {
+               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;
+       }
+       video_set_drvdata(vd, t);
+
+       /* Register it */
+       err = video_register_device(vd, VFL_TYPE_VTX, -1);
+       if (err < 0) {
+               kfree(t);
+               kfree(vd);
+               return err;
+       }
+       t->client = client;
+       return 0;
+}
+
+static int saa5249_remove(struct i2c_client *client)
+{
+       struct video_device *vd = i2c_get_clientdata(client);
+
+       video_unregister_device(vd);
+       kfree(video_get_drvdata(vd));
+       kfree(vd);
+       return 0;
+}
+
+static const struct i2c_device_id saa5249_id[] = {
+       { "saa5249", 0 },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, saa5249_id);
+
+static struct v4l2_i2c_driver_data v4l2_i2c_data = {
+       .name = "saa5249",
+       .driverid = I2C_DRIVERID_SAA5249,
+       .probe = saa5249_probe,
+       .remove = saa5249_remove,
+       .id_table = saa5249_id,
+};