Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 843 insertions, 0 deletions

diff --git a/drivers/media/video/saa5246a.c b/drivers/media/video/saa5246a.c
new file mode 100644
index 000000000000..ba69f09cbdd1
--- /dev/null
+++ b/drivers/media/video/saa5246a.c
@@ -0,0 +1,843 @@
+/*
+ * Driver for the SAA5246A or SAA5281 Teletext (=Videotext) decoder chips from
+ * Philips.
+ *
+ * Only capturing of Teletext pages is tested. The videotext chips also have a
+ * TV output but my hardware doesn't use it. For this reason this driver does
+ * not support changing any TV display settings.
+ *
+ * Copyright (C) 2004 Michael Geng <linux@MichaelGeng.de>
+ *
+ * Derived from
+ *
+ * saa5249 driver
+ * Copyright (C) 1998 Richard Guenther
+ * <richard.guenther@student.uni-tuebingen.de>
+ *
+ * with changes by
+ * Alan Cox <Alan.Cox@linux.org>
+ *
+ * and
+ *
+ * vtx.c
+ * 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/init.h>
+#include <linux/i2c.h>
+#include <linux/videotext.h>
+#include <linux/videodev.h>
+#include "saa5246a.h"
+
+MODULE_AUTHOR("Michael Geng <linux@MichaelGeng.de>");
+MODULE_DESCRIPTION("Philips SAA5246A, SAA5281 Teletext decoder driver");
+MODULE_LICENSE("GPL");
+
+struct saa5246a_device
+{
+        u8     pgbuf[NUM_DAUS][VTX_VIRTUALSIZE];
+        int    is_searching[NUM_DAUS];
+        struct i2c_client *client;
+        struct semaphore lock;
+};
+
+static struct video_device saa_template;        /* Declared near bottom */
+
+/* Addresses to scan */
+static unsigned short normal_i2c[]       = { I2C_ADDRESS, I2C_CLIENT_END };
+static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
+I2C_CLIENT_INSMOD;
+
+static struct i2c_client client_template;
+
+static int saa5246a_attach(struct i2c_adapter *adap, int addr, int kind)
+{
+        int pgbuf;
+        int err;
+        struct i2c_client *client;
+        struct video_device *vd;
+        struct saa5246a_device *t;
+
+        printk(KERN_INFO "saa5246a: 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 = video_device_alloc();
+        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->pgbuf[pgbuf], ' ', sizeof(t->pgbuf[0]));
+                t->is_searching[pgbuf] = FALSE;
+        }
+        vd->priv=t;
+
+
+        /*
+         *      Register it
+         */
+
+        if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
+        {
+                kfree(t);
+                kfree(client);
+                video_device_release(vd);
+                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 saa5246a_probe(struct i2c_adapter *adap)
+{
+        if (adap->class & I2C_CLASS_TV_ANALOG)
+                return i2c_probe(adap, &addr_data, saa5246a_attach);
+        return 0;
+}
+
+static int saa5246a_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(client);
+        return 0;
+}
+
+static int saa5246a_command(struct i2c_client *device, unsigned int cmd,
+        void *arg)
+{
+        return -EINVAL;
+}
+
+/*
+ *      I2C interfaces
+ */
+
+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 = saa5246a_probe,
+        .detach_client  = saa5246a_detach,
+        .command        = saa5246a_command
+};
+
+static struct i2c_client client_template = {
+        .driver         = &i2c_driver_videotext,
+        .name           = "(unset)",
+};
+
+static int i2c_sendbuf(struct saa5246a_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 saa5246a_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 saa5246a_device *t, int count, u8 *buf)
+{
+        if(i2c_master_recv(t->client, buf, count)!=count)
+                return -1;
+        return 0;
+}
+
+/* When a page is found then the not FOUND bit in one of the status registers
+ * of the SAA5264A chip is cleared. Unfortunately this bit is not set
+ * automatically when a new page is requested. Instead this function must be
+ * called after a page has been requested.
+ *
+ * Return value: 0 if successful
+ */
+static int saa5246a_clear_found_bit(struct saa5246a_device *t,
+        unsigned char dau_no)
+{
+        unsigned char row_25_column_8;
+
+        if (i2c_senddata(t, SAA5246A_REGISTER_R8,
+
+                dau_no |
+                R8_DO_NOT_CLEAR_MEMORY,
+
+                R9_CURSER_ROW_25,
+
+                R10_CURSER_COLUMN_8,
+
+                COMMAND_END) ||
+                i2c_getdata(t, 1, &row_25_column_8))
+        {
+                return -EIO;
+        }
+        row_25_column_8 |= ROW25_COLUMN8_PAGE_NOT_FOUND;
+        if (i2c_senddata(t, SAA5246A_REGISTER_R8,
+
+                dau_no |
+                R8_DO_NOT_CLEAR_MEMORY,
+
+                R9_CURSER_ROW_25,
+
+                R10_CURSER_COLUMN_8,
+
+                row_25_column_8,
+
+                COMMAND_END))
+        {
+                return -EIO;
+        }
+
+        return 0;
+}
+
+/* Requests one videotext page as described in req. The fields of req are
+ * checked and an error is returned if something is invalid.
+ *
+ * Return value: 0 if successful
+ */
+static int saa5246a_request_page(struct saa5246a_device *t,
+    vtx_pagereq_t *req)
+{
+        if (req->pagemask < 0 || req->pagemask >= PGMASK_MAX)
+                return -EINVAL;
+        if (req->pagemask & PGMASK_PAGE)
+                if (req->page < 0 || req->page > PAGE_MAX)
+                        return -EINVAL;
+        if (req->pagemask & PGMASK_HOUR)
+                if (req->hour < 0 || req->hour > HOUR_MAX)
+                        return -EINVAL;
+        if (req->pagemask & PGMASK_MINUTE)
+                if (req->minute < 0 || req->minute > MINUTE_MAX)
+                        return -EINVAL;
+        if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
+                return -EINVAL;
+
+        if (i2c_senddata(t, SAA5246A_REGISTER_R2,
+
+                R2_IN_R3_SELECT_PAGE_HUNDREDS |
+                req->pgbuf << 4 |
+                R2_BANK_0 |
+                R2_HAMMING_CHECK_OFF,
+
+                HUNDREDS_OF_PAGE(req->page) |
+                R3_HOLD_PAGE |
+                (req->pagemask & PG_HUND ?
+                        R3_PAGE_HUNDREDS_DO_CARE :
+                        R3_PAGE_HUNDREDS_DO_NOT_CARE),
+
+                TENS_OF_PAGE(req->page) |
+                (req->pagemask & PG_TEN ?
+                        R3_PAGE_TENS_DO_CARE :
+                        R3_PAGE_TENS_DO_NOT_CARE),
+
+                UNITS_OF_PAGE(req->page) |
+                (req->pagemask & PG_UNIT ?
+                        R3_PAGE_UNITS_DO_CARE :
+                        R3_PAGE_UNITS_DO_NOT_CARE),
+
+                TENS_OF_HOUR(req->hour) |
+                (req->pagemask & HR_TEN ?
+                        R3_HOURS_TENS_DO_CARE :
+                        R3_HOURS_TENS_DO_NOT_CARE),
+
+                UNITS_OF_HOUR(req->hour) |
+                (req->pagemask & HR_UNIT ?
+                        R3_HOURS_UNITS_DO_CARE :
+                        R3_HOURS_UNITS_DO_NOT_CARE),
+
+                TENS_OF_MINUTE(req->minute) |
+                (req->pagemask & MIN_TEN ?
+                        R3_MINUTES_TENS_DO_CARE :
+                        R3_MINUTES_TENS_DO_NOT_CARE),
+
+                UNITS_OF_MINUTE(req->minute) |
+                (req->pagemask & MIN_UNIT ?
+                        R3_MINUTES_UNITS_DO_CARE :
+                        R3_MINUTES_UNITS_DO_NOT_CARE),
+
+                COMMAND_END) || i2c_senddata(t, SAA5246A_REGISTER_R2,
+
+                R2_IN_R3_SELECT_PAGE_HUNDREDS |
+                req->pgbuf << 4 |
+                R2_BANK_0 |
+                R2_HAMMING_CHECK_OFF,
+
+                HUNDREDS_OF_PAGE(req->page) |
+                R3_UPDATE_PAGE |
+                (req->pagemask & PG_HUND ?
+                        R3_PAGE_HUNDREDS_DO_CARE :
+                        R3_PAGE_HUNDREDS_DO_NOT_CARE),
+
+                COMMAND_END))
+        {
+                return -EIO;
+        }
+
+        t->is_searching[req->pgbuf] = TRUE;
+        return 0;
+}
+
+/* This routine decodes the page number from the infobits contained in line 25.
+ *
+ * Parameters:
+ * infobits: must be bits 0 to 9 of column 25
+ *
+ * Return value: page number coded in hexadecimal, i. e. page 123 is coded 0x123
+ */
+static inline int saa5246a_extract_pagenum_from_infobits(
+    unsigned char infobits[10])
+{
+        int page_hundreds, page_tens, page_units;
+
+        page_units    = infobits[0] & ROW25_COLUMN0_PAGE_UNITS;
+        page_tens     = infobits[1] & ROW25_COLUMN1_PAGE_TENS;
+        page_hundreds = infobits[8] & ROW25_COLUMN8_PAGE_HUNDREDS;
+
+        /* page 0x.. means page 8.. */
+        if (page_hundreds == 0)
+                page_hundreds = 8;
+
+        return((page_hundreds << 8) | (page_tens << 4) | page_units);
+}
+
+/* Decodes the hour from the infobits contained in line 25.
+ *
+ * Parameters:
+ * infobits: must be bits 0 to 9 of column 25
+ *
+ * Return: hour coded in hexadecimal, i. e. 12h is coded 0x12
+ */
+static inline int saa5246a_extract_hour_from_infobits(
+    unsigned char infobits[10])
+{
+        int hour_tens, hour_units;
+
+        hour_units = infobits[4] & ROW25_COLUMN4_HOUR_UNITS;
+        hour_tens  = infobits[5] & ROW25_COLUMN5_HOUR_TENS;
+
+        return((hour_tens << 4) | hour_units);
+}
+
+/* Decodes the minutes from the infobits contained in line 25.
+ *
+ * Parameters:
+ * infobits: must be bits 0 to 9 of column 25
+ *
+ * Return: minutes coded in hexadecimal, i. e. 10min is coded 0x10
+ */
+static inline int saa5246a_extract_minutes_from_infobits(
+    unsigned char infobits[10])
+{
+        int minutes_tens, minutes_units;
+
+        minutes_units = infobits[2] & ROW25_COLUMN2_MINUTES_UNITS;
+        minutes_tens  = infobits[3] & ROW25_COLUMN3_MINUTES_TENS;
+
+        return((minutes_tens << 4) | minutes_units);
+}
+
+/* Reads the status bits contained in the first 10 columns of the first line
+ * and extracts the information into info.
+ *
+ * Return value: 0 if successful
+ */
+static inline int saa5246a_get_status(struct saa5246a_device *t,
+    vtx_pageinfo_t *info, unsigned char dau_no)
+{
+        unsigned char infobits[10];
+        int column;
+
+        if (dau_no >= NUM_DAUS)
+                return -EINVAL;
+
+        if (i2c_senddata(t, SAA5246A_REGISTER_R8,
+
+                dau_no |
+                R8_DO_NOT_CLEAR_MEMORY,
+
+                R9_CURSER_ROW_25,
+
+                R10_CURSER_COLUMN_0,
+
+                COMMAND_END) ||
+                i2c_getdata(t, 10, infobits))
+        {
+                return -EIO;
+        }
+
+        info->pagenum = saa5246a_extract_pagenum_from_infobits(infobits);
+        info->hour    = saa5246a_extract_hour_from_infobits(infobits);
+        info->minute  = saa5246a_extract_minutes_from_infobits(infobits);
+        info->charset = ((infobits[7] & ROW25_COLUMN7_CHARACTER_SET) >> 1);
+        info->delete = !!(infobits[3] & ROW25_COLUMN3_DELETE_PAGE);
+        info->headline = !!(infobits[5] & ROW25_COLUMN5_INSERT_HEADLINE);
+        info->subtitle = !!(infobits[5] & ROW25_COLUMN5_INSERT_SUBTITLE);
+        info->supp_header = !!(infobits[6] & ROW25_COLUMN6_SUPPRESS_HEADER);
+        info->update = !!(infobits[6] & ROW25_COLUMN6_UPDATE_PAGE);
+        info->inter_seq = !!(infobits[6] & ROW25_COLUMN6_INTERRUPTED_SEQUENCE);
+        info->dis_disp = !!(infobits[6] & ROW25_COLUMN6_SUPPRESS_DISPLAY);
+        info->serial = !!(infobits[7] & ROW25_COLUMN7_SERIAL_MODE);
+        info->notfound = !!(infobits[8] & ROW25_COLUMN8_PAGE_NOT_FOUND);
+        info->pblf = !!(infobits[9] & ROW25_COLUMN9_PAGE_BEING_LOOKED_FOR);
+        info->hamming = 0;
+        for (column = 0; column <= 7; column++) {
+                if (infobits[column] & ROW25_COLUMN0_TO_7_HAMMING_ERROR) {
+                        info->hamming = 1;
+                        break;
+                }
+        }
+        if (!info->hamming && !info->notfound)
+                t->is_searching[dau_no] = FALSE;
+        return 0;
+}
+
+/* Reads 1 videotext page buffer of the SAA5246A.
+ *
+ * req is used both as input and as output. It contains information which part
+ * must be read. The videotext page is copied into req->buffer.
+ *
+ * Return value: 0 if successful
+ */
+static inline int saa5246a_get_page(struct saa5246a_device *t,
+        vtx_pagereq_t *req)
+{
+        int start, end, size;
+        char *buf;
+        int err;
+
+        if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS ||
+            req->start < 0 || req->start > req->end || req->end >= VTX_PAGESIZE)
+                return -EINVAL;
+
+        buf = kmalloc(VTX_PAGESIZE, GFP_KERNEL);
+        if (!buf)
+                return -ENOMEM;
+
+        /* Read "normal" part of page */
+        err = -EIO;
+
+        end = min(req->end, VTX_PAGESIZE - 1);
+        if (i2c_senddata(t, SAA5246A_REGISTER_R8,
+                        req->pgbuf | R8_DO_NOT_CLEAR_MEMORY,
+                        ROW(req->start), COLUMN(req->start), COMMAND_END))
+                goto out;
+        if (i2c_getdata(t, end - req->start + 1, buf))
+                goto out;
+        err = -EFAULT;
+        if (copy_to_user(req->buffer, buf, end - req->start + 1))
+                goto out;
+
+        /* Always get the time from buffer 4, since this stupid SAA5246A only
+         * updates the currently displayed buffer...
+         */
+        if (REQ_CONTAINS_TIME(req)) {
+                start = max(req->start, POS_TIME_START);
+                end   = min(req->end,   POS_TIME_END);
+                size = end - start + 1;
+                err = -EINVAL;
+                if (size < 0)
+                        goto out;
+                err = -EIO;
+                if (i2c_senddata(t, SAA5246A_REGISTER_R8,
+                                R8_ACTIVE_CHAPTER_4 | R8_DO_NOT_CLEAR_MEMORY,
+                                R9_CURSER_ROW_0, start, COMMAND_END))
+                        goto out;
+                if (i2c_getdata(t, size, buf))
+                        goto out;
+                err = -EFAULT;
+                if (copy_to_user(req->buffer + start - req->start, buf, size))
+                        goto out;
+        }
+        /* Insert the header from buffer 4 only, if acquisition circuit is still searching for a page */
+        if (REQ_CONTAINS_HEADER(req) && t->is_searching[req->pgbuf]) {
+                start = max(req->start, POS_HEADER_START);
+                end   = min(req->end,   POS_HEADER_END);
+                size = end - start + 1;
+                err = -EINVAL;
+                if (size < 0)
+                        goto out;
+                err = -EIO;
+                if (i2c_senddata(t, SAA5246A_REGISTER_R8,
+                                R8_ACTIVE_CHAPTER_4 | R8_DO_NOT_CLEAR_MEMORY,
+                                R9_CURSER_ROW_0, start, COMMAND_END))
+                        goto out;
+                if (i2c_getdata(t, end - start + 1, buf))
+                        goto out;
+                err = -EFAULT;
+                if (copy_to_user(req->buffer + start - req->start, buf, size))
+                        goto out;
+        }
+        err = 0;
+out:
+        kfree(buf);
+        return err;
+}
+
+/* Stops the acquisition circuit given in dau_no. The page buffer associated
+ * with this acquisition circuit will no more be updated. The other daus are
+ * not affected.
+ *
+ * Return value: 0 if successful
+ */
+static inline int saa5246a_stop_dau(struct saa5246a_device *t,
+    unsigned char dau_no)
+{
+        if (dau_no >= NUM_DAUS)
+                return -EINVAL;
+        if (i2c_senddata(t, SAA5246A_REGISTER_R2,
+
+                R2_IN_R3_SELECT_PAGE_HUNDREDS |
+                dau_no << 4 |
+                R2_BANK_0 |
+                R2_HAMMING_CHECK_OFF,
+
+                R3_PAGE_HUNDREDS_0 |
+                R3_HOLD_PAGE |
+                R3_PAGE_HUNDREDS_DO_NOT_CARE,
+
+                COMMAND_END))
+        {
+                return -EIO;
+        }
+        t->is_searching[dau_no] = FALSE;
+        return 0;
+}
+
+/*  Handles ioctls defined in videotext.h
+ *
+ *  Returns 0 if successful
+ */
+static int do_saa5246a_ioctl(struct inode *inode, struct file *file,
+                            unsigned int cmd, void *arg)
+{
+        struct video_device *vd = video_devdata(file);
+        struct saa5246a_device *t=vd->priv;
+        switch(cmd)
+        {
+                case VTXIOCGETINFO:
+                {
+                        vtx_info_t *info = arg;
+
+                        info->version_major = MAJOR_VERSION;
+                        info->version_minor = MINOR_VERSION;
+                        info->numpages = NUM_DAUS;
+                        return 0;
+                }
+
+                case VTXIOCCLRPAGE:
+                {
+                        vtx_pagereq_t *req = arg;
+
+                        if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
+                                return -EINVAL;
+                        memset(t->pgbuf[req->pgbuf], ' ', sizeof(t->pgbuf[0]));
+                        return 0;
+                }
+
+                case VTXIOCCLRFOUND:
+                {
+                        vtx_pagereq_t *req = arg;
+
+                        if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
+                                return -EINVAL;
+                        return(saa5246a_clear_found_bit(t, req->pgbuf));
+                }
+
+                case VTXIOCPAGEREQ:
+                {
+                        vtx_pagereq_t *req = arg;
+
+                        return(saa5246a_request_page(t, req));
+                }
+
+                case VTXIOCGETSTAT:
+                {
+                        vtx_pagereq_t *req = arg;
+                        vtx_pageinfo_t info;
+                        int rval;
+
+                        if ((rval = saa5246a_get_status(t, &info, req->pgbuf)))
+                                return rval;
+                        if(copy_to_user(req->buffer, &info,
+                                sizeof(vtx_pageinfo_t)))
+                                return -EFAULT;
+                        return 0;
+                }
+
+                case VTXIOCGETPAGE:
+                {
+                        vtx_pagereq_t *req = arg;
+
+                        return(saa5246a_get_page(t, req));
+                }
+
+                case VTXIOCSTOPDAU:
+                {
+                        vtx_pagereq_t *req = arg;
+
+                        return(saa5246a_stop_dau(t, req->pgbuf));
+                }
+
+                case VTXIOCPUTPAGE:
+                case VTXIOCSETDISP:
+                case VTXIOCPUTSTAT:
+                        return 0;
+
+                case VTXIOCCLRCACHE:
+                {
+                        return 0;
+                }
+
+                case VTXIOCSETVIRT:
+                {
+                        /* I do not know what "virtual mode" means */
+                        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 saa5246a_ioctl(struct inode *inode, struct file *file,
+                         unsigned int cmd, unsigned long arg)
+{
+        struct video_device *vd = video_devdata(file);
+        struct saa5246a_device *t = vd->priv;
+        int err;
+
+        cmd = vtx_fix_command(cmd);
+        down(&t->lock);
+        err = video_usercopy(inode, file, cmd, arg, do_saa5246a_ioctl);
+        up(&t->lock);
+        return err;
+}
+
+static int saa5246a_open(struct inode *inode, struct file *file)
+{
+        struct video_device *vd = video_devdata(file);
+        struct saa5246a_device *t = vd->priv;
+        int err;
+
+        err = video_exclusive_open(inode,file);
+        if (err < 0)
+                return err;
+
+        if (t->client==NULL) {
+                err = -ENODEV;
+                goto fail;
+        }
+
+        if (i2c_senddata(t, SAA5246A_REGISTER_R0,
+
+                R0_SELECT_R11 |
+                R0_PLL_TIME_CONSTANT_LONG |
+                R0_ENABLE_nODD_EVEN_OUTPUT |
+                R0_ENABLE_HDR_POLL |
+                R0_DO_NOT_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED |
+                R0_NO_FREE_RUN_PLL |
+                R0_NO_AUTOMATIC_FASTEXT_PROMPT,
+
+                R1_NON_INTERLACED_312_312_LINES |
+                R1_DEW |
+                R1_EXTENDED_PACKET_DISABLE |
+                R1_DAUS_ALL_ON |
+                R1_8_BITS_NO_PARITY |
+                R1_VCS_TO_SCS,
+
+                COMMAND_END) ||
+                i2c_senddata(t, SAA5246A_REGISTER_R4,
+
+                /* We do not care much for the TV display but nevertheless we
+                 * need the currently displayed page later because only on that
+                 * page the time is updated. */
+                R4_DISPLAY_PAGE_4,
+
+                COMMAND_END))
+        {
+                err = -EIO;
+                goto fail;
+        }
+
+        return 0;
+
+fail:
+        video_exclusive_release(inode,file);
+        return err;
+}
+
+static int saa5246a_release(struct inode *inode, struct file *file)
+{
+        struct video_device *vd = video_devdata(file);
+        struct saa5246a_device *t = vd->priv;
+
+        /* Stop all acquisition circuits. */
+        i2c_senddata(t, SAA5246A_REGISTER_R1,
+
+                R1_INTERLACED_312_AND_HALF_312_AND_HALF_LINES |
+                R1_DEW |
+                R1_EXTENDED_PACKET_DISABLE |
+                R1_DAUS_ALL_OFF |
+                R1_8_BITS_NO_PARITY |
+                R1_VCS_TO_SCS,
+
+                COMMAND_END);
+        video_exclusive_release(inode,file);
+        return 0;
+}
+
+static int __init init_saa_5246a (void)
+{
+        printk(KERN_INFO
+                "SAA5246A (or compatible) Teletext decoder driver version %d.%d\n",
+                MAJOR_VERSION, MINOR_VERSION);
+        return i2c_add_driver(&i2c_driver_videotext);
+}
+
+static void __exit cleanup_saa_5246a (void)
+{
+        i2c_del_driver(&i2c_driver_videotext);
+}
+
+module_init(init_saa_5246a);
+module_exit(cleanup_saa_5246a);
+
+static struct file_operations saa_fops = {
+        .owner   = THIS_MODULE,
+        .open    = saa5246a_open,
+        .release = saa5246a_release,
+        .ioctl   = saa5246a_ioctl,
+        .llseek  = no_llseek,
+};
+
+static struct video_device saa_template =
+{
+        .owner    = THIS_MODULE,
+        .name     = IF_NAME,
+        .type     = VID_TYPE_TELETEXT,
+        .hardware = VID_HARDWARE_SAA5249,
+        .fops     = &saa_fops,
+        .release  = video_device_release,
+        .minor    = -1,
+};