/*
* 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/mm.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/videotext.h>
#include <linux/videodev.h>
#include <media/v4l2-common.h>
#include <linux/mutex.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 mutex lock;
};
static struct video_device saa_template; /* Declared near bottom */
/* Addresses to scan */
static unsigned short normal_i2c[] = { I2C_ADDRESS, 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 = 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 = 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;
}
/*
* I2C interfaces
*/
static struct i2c_driver i2c_driver_videotext =
{
.driver = {
.name = IF_NAME, /* name */
},
.id = I2C_DRIVERID_SAA5249, /* in i2c.h */
.attach_adapter = saa5246a_probe,
.detach_client = saa5246a_detach,
};
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;
va_end(argp);
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);
mutex_lock(&t->lock);
err = video_usercopy(inode, file, cmd, arg, do_saa5246a_ioctl);
mutex_unlock(&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 const 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,
.fops = &saa_fops,
.release = video_device_release,
.minor = -1,
};
