patch-2.4.0-test7 linux/drivers/char/saa5249.c
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- Lines: 684
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.4.0-test6/linux/drivers/char/saa5249.c
- Orig date:
Thu Feb 10 17:11:08 2000
diff -u --recursive --new-file v2.4.0-test6/linux/drivers/char/saa5249.c linux/drivers/char/saa5249.c
@@ -1,683 +0,0 @@
-/*
- * 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 7
-
-
-
-#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;
-};
-
-
-#define CCTWR 34 /* I²C 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 I²C-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
-#ifndef MIN
-#define MIN(a, b) ((a) < (b) ? (a) : (b))
-#define MAX(a, b) ((a) > (b) ? (a) : (b))
-#endif
-
-#define RESCHED \
- do { \
- if (current->need_resched) \
- schedule(); \
- } while (0)
-
-static struct video_device saa_template; /* Declared near bottom */
-
-/* Addresses to scan */
-static unsigned short normal_i2c[] = {34>>1,I2C_CLIENT_END};
-static unsigned short normal_i2c_range[] = {I2C_CLIENT_END};
-static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
-static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
-static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
-static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
-static unsigned short force[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
-
-static struct i2c_client_address_data addr_data = {
- normal_i2c, normal_i2c_range,
- probe, probe_range,
- ignore, ignore_range,
- force
-};
-
-static struct i2c_client client_template;
-
-static int saa5249_attach(struct i2c_adapter *adap, int addr, unsigned short flags, 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));
- strcpy(client->name, IF_NAME);
-
- /*
- * Now create a video4linux device
- */
-
- client->data = vd=(struct video_device *)kmalloc(sizeof(struct video_device), GFP_KERNEL);
- if(vd==NULL)
- {
- kfree(t);
- kfree(client);
- return -ENOMEM;
- }
- 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))<0)
- {
- kfree(t);
- kfree(vd);
- kfree(client);
- return err;
- }
- t->client = client;
- i2c_attach_client(client);
- MOD_INC_USE_COUNT;
- 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)
-{
- /* Only attach these chips to the BT848 bus for now */
-
- if (adap->id == (I2C_ALGO_BIT | I2C_HW_B_BT848))
- {
- return i2c_probe(adap, &addr_data, saa5249_attach);
- }
- return 0;
-}
-
-static int saa5249_detach(struct i2c_client *client)
-{
- struct video_device *vd=client->data;
- i2c_detach_client(client);
- video_unregister_device(vd);
- kfree(vd->priv);
- kfree(vd);
- kfree(client);
- MOD_DEC_USE_COUNT;
- 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 =
-{
- IF_NAME, /* name */
- I2C_DRIVERID_SAA5249, /* in i2c.h */
- I2C_DF_NOTIFY,
- saa5249_probe,
- saa5249_detach,
- saa5249_command
-};
-
-static struct i2c_client client_template = {
- "(unset)",
- -1,
- 0,
- 0,
- NULL,
- &i2c_driver_videotext
-};
-
-/*
- * 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(¤t->sigmask_lock);
- sigfillset(¤t->blocked);
- recalc_sigpending(current);
- spin_unlock_irq(¤t->sigmask_lock);
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(delay);
-
- spin_lock_irq(¤t->sigmask_lock);
- current->blocked = oldblocked;
- recalc_sigpending(current);
- spin_unlock_irq(¤t->sigmask_lock);
-}
-
-
-/*
- * 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 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 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 saa5249_ioctl(struct video_device *vd, unsigned int cmd, void *arg)
-{
- struct saa5249_device *t=vd->priv;
- static int virtual_mode = FALSE;
-
- switch(cmd)
- {
- case VTXIOCGETINFO:
- {
- vtx_info_t info;
- info.version_major = VTX_VER_MAJ;
- info.version_minor = VTX_VER_MIN;
- info.numpages = NUM_DAUS;
- /*info.cct_type = CCT_TYPE;*/
- if(copy_to_user((void*)arg, &info, sizeof(vtx_info_t)))
- return -EFAULT;
- return 0;
- }
-
- case VTXIOCCLRPAGE:
- {
- vtx_pagereq_t req;
-
- if(copy_from_user(&req, (void*)arg, sizeof(vtx_pagereq_t)))
- return -EFAULT;
- 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;
-
- if(copy_from_user(&req, (void*)arg, sizeof(vtx_pagereq_t)))
- return -EFAULT;
- if (req.pgbuf < 0 || req.pgbuf >= NUM_DAUS)
- return -EINVAL;
- t->vdau[req.pgbuf].clrfound = TRUE;
- return 0;
- }
-
- case VTXIOCPAGEREQ:
- {
- vtx_pagereq_t req;
- if(copy_from_user(&req, (void*)arg, sizeof(vtx_pagereq_t)))
- return -EFAULT;
- 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;
- u8 infobits[10];
- vtx_pageinfo_t info;
- int a;
-
- if(copy_from_user(&req, (void*)arg, sizeof(vtx_pagereq_t)))
- return -EFAULT;
- 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;
- int start, end;
-
- if(copy_from_user(&req, (void*)arg, sizeof(vtx_pagereq_t)))
- return -EFAULT;
- 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;
-
- if(copy_from_user(&req, (void*)arg, sizeof(vtx_pagereq_t)))
- return -EFAULT;
- 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)arg;
- return 0;
- }
- }
- return -EINVAL;
-}
-
-
-static int saa5249_open(struct video_device *vd, int nb)
-{
- struct saa5249_device *t=vd->priv;
- int pgbuf;
-
- if (t->client==NULL)
- return -ENODEV;
-
- 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 */
-
- {
- return -EIO;
- }
-
- 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;
- MOD_INC_USE_COUNT;
- return 0;
-}
-
-
-
-static void saa5249_release(struct video_device *vd)
-{
- 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 */
- MOD_DEC_USE_COUNT;
- return;
-}
-
-static long saa5249_write(struct video_device *v, const char *buf, unsigned long l, int nb)
-{
- return -EINVAL;
-}
-
-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 video_device saa_template =
-{
- IF_NAME,
- VID_TYPE_TELETEXT, /*| VID_TYPE_TUNER ?? */
- VID_HARDWARE_SAA5249,
- saa5249_open,
- saa5249_release,
- NULL, /* read */
- saa5249_write,
- NULL, /* poll */
- saa5249_ioctl,
- /* the rest are null */
-};
-
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TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)