mirror of https://gitee.com/openkylin/linux.git
725 lines
19 KiB
C
725 lines
19 KiB
C
/*
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* Modified in order to keep it compatible both with new and old videotext IOCTLs by
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* Michael Geng <linux@MichaelGeng.de>
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*
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* Cleaned up to use existing videodev interface and allow the idea
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* of multiple teletext decoders on the video4linux iface. Changed i2c
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* to cover addressing clashes on device busses. It's also rebuilt so
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* you can add arbitary multiple teletext devices to Linux video4linux
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* now (well 32 anyway).
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*
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* Alan Cox <Alan.Cox@linux.org>
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*
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* The original driver was heavily modified to match the i2c interface
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* It was truncated to use the WinTV boards, too.
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*
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* Copyright (c) 1998 Richard Guenther <richard.guenther@student.uni-tuebingen.de>
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*
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* $Id: saa5249.c,v 1.1 1998/03/30 22:23:23 alan Exp $
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*
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* Derived From
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*
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* vtx.c:
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* This is a loadable character-device-driver for videotext-interfaces
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* (aka teletext). Please check the Makefile/README for a list of supported
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* interfaces.
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*
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* Copyright (c) 1994-97 Martin Buck <martin-2.buck@student.uni-ulm.de>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/errno.h>
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#include <linux/delay.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <stdarg.h>
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#include <linux/i2c.h>
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#include <linux/videotext.h>
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#include <linux/videodev.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#define VTX_VER_MAJ 1
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#define VTX_VER_MIN 8
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#define NUM_DAUS 4
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#define NUM_BUFS 8
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#define IF_NAME "SAA5249"
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static const int disp_modes[8][3] =
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{
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{ 0x46, 0x03, 0x03 }, /* DISPOFF */
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{ 0x46, 0xcc, 0xcc }, /* DISPNORM */
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{ 0x44, 0x0f, 0x0f }, /* DISPTRANS */
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{ 0x46, 0xcc, 0x46 }, /* DISPINS */
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{ 0x44, 0x03, 0x03 }, /* DISPOFF, interlaced */
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{ 0x44, 0xcc, 0xcc }, /* DISPNORM, interlaced */
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{ 0x44, 0x0f, 0x0f }, /* DISPTRANS, interlaced */
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{ 0x44, 0xcc, 0x46 } /* DISPINS, interlaced */
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};
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#define PAGE_WAIT (300*HZ/1000) /* Time between requesting page and */
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/* checking status bits */
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#define PGBUF_EXPIRE (15*HZ) /* Time to wait before retransmitting */
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/* page regardless of infobits */
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typedef struct {
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u8 pgbuf[VTX_VIRTUALSIZE]; /* Page-buffer */
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u8 laststat[10]; /* Last value of infobits for DAU */
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u8 sregs[7]; /* Page-request registers */
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unsigned long expire; /* Time when page will be expired */
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unsigned clrfound : 1; /* VTXIOCCLRFOUND has been called */
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unsigned stopped : 1; /* VTXIOCSTOPDAU has been called */
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} vdau_t;
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struct saa5249_device
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{
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vdau_t vdau[NUM_DAUS]; /* Data for virtual DAUs (the 5249 only has one */
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/* real DAU, so we have to simulate some more) */
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int vtx_use_count;
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int is_searching[NUM_DAUS];
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int disp_mode;
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int virtual_mode;
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struct i2c_client *client;
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struct semaphore lock;
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};
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#define CCTWR 34 /* I<>C write/read-address of vtx-chip */
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#define CCTRD 35
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#define NOACK_REPEAT 10 /* Retry access this many times on failure */
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#define CLEAR_DELAY (HZ/20) /* Time required to clear a page */
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#define READY_TIMEOUT (30*HZ/1000) /* Time to wait for ready signal of I<>C-bus interface */
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#define INIT_DELAY 500 /* Time in usec to wait at initialization of CEA interface */
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#define START_DELAY 10 /* Time in usec to wait before starting write-cycle (CEA) */
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#define VTX_DEV_MINOR 0
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/* General defines and debugging support */
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#ifndef FALSE
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#define FALSE 0
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#define TRUE 1
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#endif
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#define RESCHED do { cond_resched(); } while(0)
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static struct video_device saa_template; /* Declared near bottom */
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/* Addresses to scan */
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static unsigned short normal_i2c[] = {34>>1,I2C_CLIENT_END};
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I2C_CLIENT_INSMOD;
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static struct i2c_client client_template;
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static int saa5249_attach(struct i2c_adapter *adap, int addr, int kind)
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{
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int pgbuf;
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int err;
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struct i2c_client *client;
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struct video_device *vd;
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struct saa5249_device *t;
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printk(KERN_INFO "saa5249: teletext chip found.\n");
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client=kmalloc(sizeof(*client), GFP_KERNEL);
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if(client==NULL)
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return -ENOMEM;
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client_template.adapter = adap;
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client_template.addr = addr;
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memcpy(client, &client_template, sizeof(*client));
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t = kmalloc(sizeof(*t), GFP_KERNEL);
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if(t==NULL)
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{
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kfree(client);
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return -ENOMEM;
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}
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memset(t, 0, sizeof(*t));
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strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
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init_MUTEX(&t->lock);
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/*
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* Now create a video4linux device
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*/
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vd = (struct video_device *)kmalloc(sizeof(struct video_device), GFP_KERNEL);
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if(vd==NULL)
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{
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kfree(t);
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kfree(client);
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return -ENOMEM;
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}
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i2c_set_clientdata(client, vd);
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memcpy(vd, &saa_template, sizeof(*vd));
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for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
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{
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memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
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memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
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memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
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t->vdau[pgbuf].expire = 0;
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t->vdau[pgbuf].clrfound = TRUE;
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t->vdau[pgbuf].stopped = TRUE;
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t->is_searching[pgbuf] = FALSE;
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}
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vd->priv=t;
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/*
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* Register it
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*/
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if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
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{
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kfree(t);
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kfree(vd);
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kfree(client);
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return err;
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}
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t->client = client;
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i2c_attach_client(client);
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return 0;
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}
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/*
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* We do most of the hard work when we become a device on the i2c.
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*/
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static int saa5249_probe(struct i2c_adapter *adap)
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{
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if (adap->class & I2C_CLASS_TV_ANALOG)
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return i2c_probe(adap, &addr_data, saa5249_attach);
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return 0;
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}
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static int saa5249_detach(struct i2c_client *client)
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{
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struct video_device *vd = i2c_get_clientdata(client);
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i2c_detach_client(client);
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video_unregister_device(vd);
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kfree(vd->priv);
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kfree(vd);
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kfree(client);
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return 0;
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}
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static int saa5249_command(struct i2c_client *device,
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unsigned int cmd, void *arg)
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{
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return -EINVAL;
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}
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/* new I2C driver support */
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static struct i2c_driver i2c_driver_videotext =
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{
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.owner = THIS_MODULE,
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.name = IF_NAME, /* name */
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.id = I2C_DRIVERID_SAA5249, /* in i2c.h */
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.flags = I2C_DF_NOTIFY,
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.attach_adapter = saa5249_probe,
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.detach_client = saa5249_detach,
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.command = saa5249_command
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};
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static struct i2c_client client_template = {
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.driver = &i2c_driver_videotext,
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.name = "(unset)",
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};
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/*
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* Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
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* delay may be longer.
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*/
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static void jdelay(unsigned long delay)
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{
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sigset_t oldblocked = current->blocked;
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spin_lock_irq(¤t->sighand->siglock);
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sigfillset(¤t->blocked);
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recalc_sigpending();
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spin_unlock_irq(¤t->sighand->siglock);
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msleep_interruptible(jiffies_to_msecs(delay));
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spin_lock_irq(¤t->sighand->siglock);
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current->blocked = oldblocked;
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recalc_sigpending();
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spin_unlock_irq(¤t->sighand->siglock);
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}
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/*
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* I2C interfaces
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*/
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static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data)
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{
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char buf[64];
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buf[0] = reg;
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memcpy(buf+1, data, count);
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if(i2c_master_send(t->client, buf, count+1)==count+1)
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return 0;
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return -1;
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}
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static int i2c_senddata(struct saa5249_device *t, ...)
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{
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unsigned char buf[64];
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int v;
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int ct=0;
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va_list argp;
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va_start(argp,t);
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while((v=va_arg(argp,int))!=-1)
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buf[ct++]=v;
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return i2c_sendbuf(t, buf[0], ct-1, buf+1);
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}
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/* Get count number of bytes from I<>C-device at address adr, store them in buf. Start & stop
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* handshaking is done by this routine, ack will be sent after the last byte to inhibit further
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* sending of data. If uaccess is TRUE, data is written to user-space with put_user.
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* Returns -1 if I<>C-device didn't send acknowledge, 0 otherwise
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*/
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static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf)
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{
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if(i2c_master_recv(t->client, buf, count)!=count)
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return -1;
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return 0;
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}
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/*
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* Standard character-device-driver functions
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*/
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static int do_saa5249_ioctl(struct inode *inode, struct file *file,
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unsigned int cmd, void *arg)
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{
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static int virtual_mode = FALSE;
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struct video_device *vd = video_devdata(file);
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struct saa5249_device *t=vd->priv;
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switch(cmd)
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{
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case VTXIOCGETINFO:
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{
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vtx_info_t *info = arg;
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info->version_major = VTX_VER_MAJ;
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info->version_minor = VTX_VER_MIN;
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info->numpages = NUM_DAUS;
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/*info->cct_type = CCT_TYPE;*/
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return 0;
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}
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case VTXIOCCLRPAGE:
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{
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vtx_pagereq_t *req = arg;
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if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
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return -EINVAL;
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memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
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t->vdau[req->pgbuf].clrfound = TRUE;
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return 0;
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}
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case VTXIOCCLRFOUND:
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{
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vtx_pagereq_t *req = arg;
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if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
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return -EINVAL;
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t->vdau[req->pgbuf].clrfound = TRUE;
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return 0;
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}
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case VTXIOCPAGEREQ:
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{
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vtx_pagereq_t *req = arg;
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if (!(req->pagemask & PGMASK_PAGE))
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req->page = 0;
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if (!(req->pagemask & PGMASK_HOUR))
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req->hour = 0;
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if (!(req->pagemask & PGMASK_MINUTE))
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req->minute = 0;
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if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
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return -EINVAL;
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req->page &= 0x7ff;
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if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
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req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
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return -EINVAL;
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t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
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t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
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t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
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t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
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t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
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t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
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t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
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t->vdau[req->pgbuf].stopped = FALSE;
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t->vdau[req->pgbuf].clrfound = TRUE;
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t->is_searching[req->pgbuf] = TRUE;
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return 0;
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}
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case VTXIOCGETSTAT:
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{
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vtx_pagereq_t *req = arg;
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u8 infobits[10];
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vtx_pageinfo_t info;
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int a;
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if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
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return -EINVAL;
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if (!t->vdau[req->pgbuf].stopped)
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{
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if (i2c_senddata(t, 2, 0, -1) ||
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i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
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i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
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i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
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i2c_senddata(t, 8, 0, 25, 0, -1))
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return -EIO;
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jdelay(PAGE_WAIT);
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if (i2c_getdata(t, 10, infobits))
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return -EIO;
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if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) && /* check FOUND-bit */
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(memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
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time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
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{ /* check if new page arrived */
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if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
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i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
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return -EIO;
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t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
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memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
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if (t->virtual_mode)
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{
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/* Packet X/24 */
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if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
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i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
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return -EIO;
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/* Packet X/27/0 */
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if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
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i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
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return -EIO;
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/* Packet 8/30/0...8/30/15
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* FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
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* so we should undo this here.
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*/
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if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
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i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
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return -EIO;
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}
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t->vdau[req->pgbuf].clrfound = FALSE;
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memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
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}
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else
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{
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memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
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}
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}
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else
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{
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memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
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}
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info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
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if (info.pagenum < 0x100)
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info.pagenum += 0x800;
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info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
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info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
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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");
|