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linux/drivers/media/video/saa5249.c
Jean Delvare b3d5496ea5 [PATCH] I2C: Kill address ranges in non-sensors i2c chip drivers 
Some months ago, you killed the address ranges mechanism from all
sensors i2c chip drivers (both the module parameters and the in-code
address lists). I think it was a very good move, as the ranges can
easily be replaced by individual addresses, and this allowed for
significant cleanups in the i2c core (let alone the impressive size
shrink for all these drivers).

Unfortunately you did not do the same for non-sensors i2c chip drivers.
These need the address ranges even less, so we could get rid of the
ranges here as well for another significant i2c core cleanup. Here comes
a patch which does just that. Since the process is exactly the same as
what you did for the other drivers set already, I did not split this one
in parts.

A documentation update is included.

The change saves 308 bytes in the i2c core, and an average 1382 bytes
for chip drivers which use I2C_CLIENT_INSMOD, 126 bytes for those which
do not.

This change is required if we want to merge the sensors and non-sensors
i2c code (and we want to do this).

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Index: gregkh-2.6/Documentation/i2c/writing-clients
===================================================================
2005-06-21 21:51:48 -07:00

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