saa5249: convert i2c driver for new i2c API

From: Hans Verkuil <hverkuil@xs4all.nl>

- 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

Priority: normal

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>

1 files changed, 294 insertions, 365 deletions

diff --git a/linux/drivers/media/video/saa5249.c b/linux/drivers/media/video/saa5249.c
index 398089510..763e6441b 100644
--- a/linux/drivers/media/video/saa5249.c
+++ b/linux/drivers/media/video/saa5249.c
@@ -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:
@@ -45,35 +43,28 @@
 
 #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 "compat.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 "compat.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] =
 {
@@ -126,125 +117,8 @@ 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.
@@ -278,7 +152,7 @@ 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;
 }
@@ -322,243 +196,234 @@ 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;
-
-			 /*
-			  *	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;
 		}
+		/* 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;
+	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;
 }
@@ -675,21 +540,6 @@ 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,
@@ -703,9 +553,88 @@ 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;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
+static const struct i2c_device_id saa5249_id[] = {
+	{ "saa5249", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, saa5249_id);
+#endif
+
+static struct v4l2_i2c_driver_data v4l2_i2c_data = {
+	.name = "saa5249",
+	.driverid = I2C_DRIVERID_SAA5249,
+	.probe = saa5249_probe,
+	.remove = saa5249_remove,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
+	.id_table = saa5249_id,
+#endif
+};