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62 |
marcus.erl |
/*
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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 <media/v4l2-common.h>
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#include <linux/mutex.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 msecs_to_jiffies(300) /* Time between requesting page and */
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/* checking status bits */
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#define PGBUF_EXPIRE msecs_to_jiffies(15000) /* 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 mutex lock;
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};
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#define CCTWR 34 /* I²C 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 msecs_to_jiffies(50) /* Time required to clear a page */
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#define READY_TIMEOUT msecs_to_jiffies(30) /* Time to wait for ready signal of I2C-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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#define RESCHED do { cond_resched(); } while(0)
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| 129 |
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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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| 141 |
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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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| 145 |
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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 = kzalloc(sizeof(*t), GFP_KERNEL);
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if(t==NULL)
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{
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| 155 |
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kfree(client);
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return -ENOMEM;
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}
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strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
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mutex_init(&t->lock);
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/*
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* Now create a video4linux device
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*/
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vd = 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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| 172 |
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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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| 187 |
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/*
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* Register it
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*/
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| 192 |
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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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| 200 |
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i2c_attach_client(client);
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return 0;
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}
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| 203 |
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| 204 |
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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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| 208 |
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static int saa5249_probe(struct i2c_adapter *adap)
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{
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| 210 |
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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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| 215 |
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static int saa5249_detach(struct i2c_client *client)
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{
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| 217 |
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struct video_device *vd = i2c_get_clientdata(client);
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i2c_detach_client(client);
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| 219 |
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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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| 224 |
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}
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| 226 |
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/* new I2C driver support */
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| 228 |
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static struct i2c_driver i2c_driver_videotext =
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{
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| 230 |
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.driver = {
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.name = IF_NAME, /* name */
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| 232 |
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},
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| 233 |
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.id = I2C_DRIVERID_SAA5249, /* in i2c.h */
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.attach_adapter = saa5249_probe,
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.detach_client = saa5249_detach,
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};
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| 238 |
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static struct i2c_client client_template = {
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| 239 |
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.driver = &i2c_driver_videotext,
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| 240 |
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.name = "(unset)",
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| 241 |
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};
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| 242 |
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| 243 |
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/*
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| 244 |
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* Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
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| 245 |
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* delay may be longer.
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| 246 |
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*/
|
| 247 |
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| 248 |
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static void jdelay(unsigned long delay)
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| 249 |
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{
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| 250 |
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sigset_t oldblocked = current->blocked;
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| 251 |
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| 252 |
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spin_lock_irq(¤t->sighand->siglock);
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| 253 |
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sigfillset(¤t->blocked);
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| 254 |
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recalc_sigpending();
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| 255 |
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spin_unlock_irq(¤t->sighand->siglock);
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| 256 |
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msleep_interruptible(jiffies_to_msecs(delay));
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| 257 |
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|
| 258 |
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spin_lock_irq(¤t->sighand->siglock);
|
| 259 |
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current->blocked = oldblocked;
|
| 260 |
|
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recalc_sigpending();
|
| 261 |
|
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spin_unlock_irq(¤t->sighand->siglock);
|
| 262 |
|
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}
|
| 263 |
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|
| 264 |
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|
| 265 |
|
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/*
|
| 266 |
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* I2C interfaces
|
| 267 |
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*/
|
| 268 |
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|
| 269 |
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static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data)
|
| 270 |
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{
|
| 271 |
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char buf[64];
|
| 272 |
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|
| 273 |
|
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buf[0] = reg;
|
| 274 |
|
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memcpy(buf+1, data, count);
|
| 275 |
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|
| 276 |
|
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if(i2c_master_send(t->client, buf, count+1)==count+1)
|
| 277 |
|
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return 0;
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| 278 |
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return -1;
|
| 279 |
|
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}
|
| 280 |
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|
| 281 |
|
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static int i2c_senddata(struct saa5249_device *t, ...)
|
| 282 |
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{
|
| 283 |
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unsigned char buf[64];
|
| 284 |
|
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int v;
|
| 285 |
|
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int ct = 0;
|
| 286 |
|
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va_list argp;
|
| 287 |
|
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va_start(argp,t);
|
| 288 |
|
|
|
| 289 |
|
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while ((v = va_arg(argp, int)) != -1)
|
| 290 |
|
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buf[ct++] = v;
|
| 291 |
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|
| 292 |
|
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va_end(argp);
|
| 293 |
|
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return i2c_sendbuf(t, buf[0], ct-1, buf+1);
|
| 294 |
|
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}
|
| 295 |
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|
| 296 |
|
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/* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop
|
| 297 |
|
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* handshaking is done by this routine, ack will be sent after the last byte to inhibit further
|
| 298 |
|
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* sending of data. If uaccess is 'true', data is written to user-space with put_user.
|
| 299 |
|
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* Returns -1 if I²C-device didn't send acknowledge, 0 otherwise
|
| 300 |
|
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*/
|
| 301 |
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|
| 302 |
|
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static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf)
|
| 303 |
|
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{
|
| 304 |
|
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if(i2c_master_recv(t->client, buf, count)!=count)
|
| 305 |
|
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return -1;
|
| 306 |
|
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return 0;
|
| 307 |
|
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}
|
| 308 |
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|
| 309 |
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|
| 310 |
|
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/*
|
| 311 |
|
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* Standard character-device-driver functions
|
| 312 |
|
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*/
|
| 313 |
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|
| 314 |
|
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static int do_saa5249_ioctl(struct inode *inode, struct file *file,
|
| 315 |
|
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unsigned int cmd, void *arg)
|
| 316 |
|
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{
|
| 317 |
|
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static int virtual_mode = false;
|
| 318 |
|
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struct video_device *vd = video_devdata(file);
|
| 319 |
|
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struct saa5249_device *t=vd->priv;
|
| 320 |
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|
| 321 |
|
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switch(cmd)
|
| 322 |
|
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{
|
| 323 |
|
|
case VTXIOCGETINFO:
|
| 324 |
|
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{
|
| 325 |
|
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vtx_info_t *info = arg;
|
| 326 |
|
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info->version_major = VTX_VER_MAJ;
|
| 327 |
|
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info->version_minor = VTX_VER_MIN;
|
| 328 |
|
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info->numpages = NUM_DAUS;
|
| 329 |
|
|
/*info->cct_type = CCT_TYPE;*/
|
| 330 |
|
|
return 0;
|
| 331 |
|
|
}
|
| 332 |
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|
|
| 333 |
|
|
case VTXIOCCLRPAGE:
|
| 334 |
|
|
{
|
| 335 |
|
|
vtx_pagereq_t *req = arg;
|
| 336 |
|
|
|
| 337 |
|
|
if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
|
| 338 |
|
|
return -EINVAL;
|
| 339 |
|
|
memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
|
| 340 |
|
|
t->vdau[req->pgbuf].clrfound = true;
|
| 341 |
|
|
return 0;
|
| 342 |
|
|
}
|
| 343 |
|
|
|
| 344 |
|
|
case VTXIOCCLRFOUND:
|
| 345 |
|
|
{
|
| 346 |
|
|
vtx_pagereq_t *req = arg;
|
| 347 |
|
|
|
| 348 |
|
|
if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
|
| 349 |
|
|
return -EINVAL;
|
| 350 |
|
|
t->vdau[req->pgbuf].clrfound = true;
|
| 351 |
|
|
return 0;
|
| 352 |
|
|
}
|
| 353 |
|
|
|
| 354 |
|
|
case VTXIOCPAGEREQ:
|
| 355 |
|
|
{
|
| 356 |
|
|
vtx_pagereq_t *req = arg;
|
| 357 |
|
|
if (!(req->pagemask & PGMASK_PAGE))
|
| 358 |
|
|
req->page = 0;
|
| 359 |
|
|
if (!(req->pagemask & PGMASK_HOUR))
|
| 360 |
|
|
req->hour = 0;
|
| 361 |
|
|
if (!(req->pagemask & PGMASK_MINUTE))
|
| 362 |
|
|
req->minute = 0;
|
| 363 |
|
|
if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
|
| 364 |
|
|
return -EINVAL;
|
| 365 |
|
|
req->page &= 0x7ff;
|
| 366 |
|
|
if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
|
| 367 |
|
|
req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
|
| 368 |
|
|
return -EINVAL;
|
| 369 |
|
|
t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
|
| 370 |
|
|
t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
|
| 371 |
|
|
t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
|
| 372 |
|
|
t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
|
| 373 |
|
|
t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
|
| 374 |
|
|
t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
|
| 375 |
|
|
t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
|
| 376 |
|
|
t->vdau[req->pgbuf].stopped = false;
|
| 377 |
|
|
t->vdau[req->pgbuf].clrfound = true;
|
| 378 |
|
|
t->is_searching[req->pgbuf] = true;
|
| 379 |
|
|
return 0;
|
| 380 |
|
|
}
|
| 381 |
|
|
|
| 382 |
|
|
case VTXIOCGETSTAT:
|
| 383 |
|
|
{
|
| 384 |
|
|
vtx_pagereq_t *req = arg;
|
| 385 |
|
|
u8 infobits[10];
|
| 386 |
|
|
vtx_pageinfo_t info;
|
| 387 |
|
|
int a;
|
| 388 |
|
|
|
| 389 |
|
|
if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
|
| 390 |
|
|
return -EINVAL;
|
| 391 |
|
|
if (!t->vdau[req->pgbuf].stopped)
|
| 392 |
|
|
{
|
| 393 |
|
|
if (i2c_senddata(t, 2, 0, -1) ||
|
| 394 |
|
|
i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
|
| 395 |
|
|
i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
|
| 396 |
|
|
i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
|
| 397 |
|
|
i2c_senddata(t, 8, 0, 25, 0, -1))
|
| 398 |
|
|
return -EIO;
|
| 399 |
|
|
jdelay(PAGE_WAIT);
|
| 400 |
|
|
if (i2c_getdata(t, 10, infobits))
|
| 401 |
|
|
return -EIO;
|
| 402 |
|
|
|
| 403 |
|
|
if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) && /* check FOUND-bit */
|
| 404 |
|
|
(memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
|
| 405 |
|
|
time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
|
| 406 |
|
|
{ /* check if new page arrived */
|
| 407 |
|
|
if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
|
| 408 |
|
|
i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
|
| 409 |
|
|
return -EIO;
|
| 410 |
|
|
t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
|
| 411 |
|
|
memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
|
| 412 |
|
|
if (t->virtual_mode)
|
| 413 |
|
|
{
|
| 414 |
|
|
/* Packet X/24 */
|
| 415 |
|
|
if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
|
| 416 |
|
|
i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
|
| 417 |
|
|
return -EIO;
|
| 418 |
|
|
/* Packet X/27/0 */
|
| 419 |
|
|
if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
|
| 420 |
|
|
i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
|
| 421 |
|
|
return -EIO;
|
| 422 |
|
|
/* Packet 8/30/0...8/30/15
|
| 423 |
|
|
* FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
|
| 424 |
|
|
* so we should undo this here.
|
| 425 |
|
|
*/
|
| 426 |
|
|
if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
|
| 427 |
|
|
i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
|
| 428 |
|
|
return -EIO;
|
| 429 |
|
|
}
|
| 430 |
|
|
t->vdau[req->pgbuf].clrfound = false;
|
| 431 |
|
|
memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
|
| 432 |
|
|
}
|
| 433 |
|
|
else
|
| 434 |
|
|
{
|
| 435 |
|
|
memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
|
| 436 |
|
|
}
|
| 437 |
|
|
}
|
| 438 |
|
|
else
|
| 439 |
|
|
{
|
| 440 |
|
|
memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
|
| 441 |
|
|
}
|
| 442 |
|
|
|
| 443 |
|
|
info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
|
| 444 |
|
|
if (info.pagenum < 0x100)
|
| 445 |
|
|
info.pagenum += 0x800;
|
| 446 |
|
|
info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
|
| 447 |
|
|
info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
|
| 448 |
|
|
info.charset = ((infobits[7] >> 1) & 7);
|
| 449 |
|
|
info.delete = !!(infobits[3] & 8);
|
| 450 |
|
|
info.headline = !!(infobits[5] & 4);
|
| 451 |
|
|
info.subtitle = !!(infobits[5] & 8);
|
| 452 |
|
|
info.supp_header = !!(infobits[6] & 1);
|
| 453 |
|
|
info.update = !!(infobits[6] & 2);
|
| 454 |
|
|
info.inter_seq = !!(infobits[6] & 4);
|
| 455 |
|
|
info.dis_disp = !!(infobits[6] & 8);
|
| 456 |
|
|
info.serial = !!(infobits[7] & 1);
|
| 457 |
|
|
info.notfound = !!(infobits[8] & 0x10);
|
| 458 |
|
|
info.pblf = !!(infobits[9] & 0x20);
|
| 459 |
|
|
info.hamming = 0;
|
| 460 |
|
|
for (a = 0; a <= 7; a++)
|
| 461 |
|
|
{
|
| 462 |
|
|
if (infobits[a] & 0xf0)
|
| 463 |
|
|
{
|
| 464 |
|
|
info.hamming = 1;
|
| 465 |
|
|
break;
|
| 466 |
|
|
}
|
| 467 |
|
|
}
|
| 468 |
|
|
if (t->vdau[req->pgbuf].clrfound)
|
| 469 |
|
|
info.notfound = 1;
|
| 470 |
|
|
if(copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
|
| 471 |
|
|
return -EFAULT;
|
| 472 |
|
|
if (!info.hamming && !info.notfound)
|
| 473 |
|
|
{
|
| 474 |
|
|
t->is_searching[req->pgbuf] = false;
|
| 475 |
|
|
}
|
| 476 |
|
|
return 0;
|
| 477 |
|
|
}
|
| 478 |
|
|
|
| 479 |
|
|
case VTXIOCGETPAGE:
|
| 480 |
|
|
{
|
| 481 |
|
|
vtx_pagereq_t *req = arg;
|
| 482 |
|
|
int start, end;
|
| 483 |
|
|
|
| 484 |
|
|
if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
|
| 485 |
|
|
req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
|
| 486 |
|
|
return -EINVAL;
|
| 487 |
|
|
if(copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
|
| 488 |
|
|
return -EFAULT;
|
| 489 |
|
|
|
| 490 |
|
|
/*
|
| 491 |
|
|
* Always read the time directly from SAA5249
|
| 492 |
|
|
*/
|
| 493 |
|
|
|
| 494 |
|
|
if (req->start <= 39 && req->end >= 32)
|
| 495 |
|
|
{
|
| 496 |
|
|
int len;
|
| 497 |
|
|
char buf[16];
|
| 498 |
|
|
start = max(req->start, 32);
|
| 499 |
|
|
end = min(req->end, 39);
|
| 500 |
|
|
len=end-start+1;
|
| 501 |
|
|
if (i2c_senddata(t, 8, 0, 0, start, -1) ||
|
| 502 |
|
|
i2c_getdata(t, len, buf))
|
| 503 |
|
|
return -EIO;
|
| 504 |
|
|
if(copy_to_user(req->buffer+start-req->start, buf, len))
|
| 505 |
|
|
return -EFAULT;
|
| 506 |
|
|
}
|
| 507 |
|
|
/* Insert the current header if DAU is still searching for a page */
|
| 508 |
|
|
if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf])
|
| 509 |
|
|
{
|
| 510 |
|
|
char buf[32];
|
| 511 |
|
|
int len;
|
| 512 |
|
|
start = max(req->start, 7);
|
| 513 |
|
|
end = min(req->end, 31);
|
| 514 |
|
|
len=end-start+1;
|
| 515 |
|
|
if (i2c_senddata(t, 8, 0, 0, start, -1) ||
|
| 516 |
|
|
i2c_getdata(t, len, buf))
|
| 517 |
|
|
return -EIO;
|
| 518 |
|
|
if(copy_to_user(req->buffer+start-req->start, buf, len))
|
| 519 |
|
|
return -EFAULT;
|
| 520 |
|
|
}
|
| 521 |
|
|
return 0;
|
| 522 |
|
|
}
|
| 523 |
|
|
|
| 524 |
|
|
case VTXIOCSTOPDAU:
|
| 525 |
|
|
{
|
| 526 |
|
|
vtx_pagereq_t *req = arg;
|
| 527 |
|
|
|
| 528 |
|
|
if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
|
| 529 |
|
|
return -EINVAL;
|
| 530 |
|
|
t->vdau[req->pgbuf].stopped = true;
|
| 531 |
|
|
t->is_searching[req->pgbuf] = false;
|
| 532 |
|
|
return 0;
|
| 533 |
|
|
}
|
| 534 |
|
|
|
| 535 |
|
|
case VTXIOCPUTPAGE:
|
| 536 |
|
|
case VTXIOCSETDISP:
|
| 537 |
|
|
case VTXIOCPUTSTAT:
|
| 538 |
|
|
return 0;
|
| 539 |
|
|
|
| 540 |
|
|
case VTXIOCCLRCACHE:
|
| 541 |
|
|
{
|
| 542 |
|
|
if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
|
| 543 |
|
|
' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',
|
| 544 |
|
|
' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ', -1))
|
| 545 |
|
|
return -EIO;
|
| 546 |
|
|
if (i2c_senddata(t, 3, 0x20, -1))
|
| 547 |
|
|
return -EIO;
|
| 548 |
|
|
jdelay(10 * CLEAR_DELAY); /* I have no idea how long we have to wait here */
|
| 549 |
|
|
return 0;
|
| 550 |
|
|
}
|
| 551 |
|
|
|
| 552 |
|
|
case VTXIOCSETVIRT:
|
| 553 |
|
|
{
|
| 554 |
|
|
/* The SAA5249 has virtual-row reception turned on always */
|
| 555 |
|
|
t->virtual_mode = (int)(long)arg;
|
| 556 |
|
|
return 0;
|
| 557 |
|
|
}
|
| 558 |
|
|
}
|
| 559 |
|
|
return -EINVAL;
|
| 560 |
|
|
}
|
| 561 |
|
|
|
| 562 |
|
|
/*
|
| 563 |
|
|
* Translates old vtx IOCTLs to new ones
|
| 564 |
|
|
*
|
| 565 |
|
|
* This keeps new kernel versions compatible with old userspace programs.
|
| 566 |
|
|
*/
|
| 567 |
|
|
static inline unsigned int vtx_fix_command(unsigned int cmd)
|
| 568 |
|
|
{
|
| 569 |
|
|
switch (cmd) {
|
| 570 |
|
|
case VTXIOCGETINFO_OLD:
|
| 571 |
|
|
cmd = VTXIOCGETINFO;
|
| 572 |
|
|
break;
|
| 573 |
|
|
case VTXIOCCLRPAGE_OLD:
|
| 574 |
|
|
cmd = VTXIOCCLRPAGE;
|
| 575 |
|
|
break;
|
| 576 |
|
|
case VTXIOCCLRFOUND_OLD:
|
| 577 |
|
|
cmd = VTXIOCCLRFOUND;
|
| 578 |
|
|
break;
|
| 579 |
|
|
case VTXIOCPAGEREQ_OLD:
|
| 580 |
|
|
cmd = VTXIOCPAGEREQ;
|
| 581 |
|
|
break;
|
| 582 |
|
|
case VTXIOCGETSTAT_OLD:
|
| 583 |
|
|
cmd = VTXIOCGETSTAT;
|
| 584 |
|
|
break;
|
| 585 |
|
|
case VTXIOCGETPAGE_OLD:
|
| 586 |
|
|
cmd = VTXIOCGETPAGE;
|
| 587 |
|
|
break;
|
| 588 |
|
|
case VTXIOCSTOPDAU_OLD:
|
| 589 |
|
|
cmd = VTXIOCSTOPDAU;
|
| 590 |
|
|
break;
|
| 591 |
|
|
case VTXIOCPUTPAGE_OLD:
|
| 592 |
|
|
cmd = VTXIOCPUTPAGE;
|
| 593 |
|
|
break;
|
| 594 |
|
|
case VTXIOCSETDISP_OLD:
|
| 595 |
|
|
cmd = VTXIOCSETDISP;
|
| 596 |
|
|
break;
|
| 597 |
|
|
case VTXIOCPUTSTAT_OLD:
|
| 598 |
|
|
cmd = VTXIOCPUTSTAT;
|
| 599 |
|
|
break;
|
| 600 |
|
|
case VTXIOCCLRCACHE_OLD:
|
| 601 |
|
|
cmd = VTXIOCCLRCACHE;
|
| 602 |
|
|
break;
|
| 603 |
|
|
case VTXIOCSETVIRT_OLD:
|
| 604 |
|
|
cmd = VTXIOCSETVIRT;
|
| 605 |
|
|
break;
|
| 606 |
|
|
}
|
| 607 |
|
|
return cmd;
|
| 608 |
|
|
}
|
| 609 |
|
|
|
| 610 |
|
|
/*
|
| 611 |
|
|
* Handle the locking
|
| 612 |
|
|
*/
|
| 613 |
|
|
|
| 614 |
|
|
static int saa5249_ioctl(struct inode *inode, struct file *file,
|
| 615 |
|
|
unsigned int cmd, unsigned long arg)
|
| 616 |
|
|
{
|
| 617 |
|
|
struct video_device *vd = video_devdata(file);
|
| 618 |
|
|
struct saa5249_device *t=vd->priv;
|
| 619 |
|
|
int err;
|
| 620 |
|
|
|
| 621 |
|
|
cmd = vtx_fix_command(cmd);
|
| 622 |
|
|
mutex_lock(&t->lock);
|
| 623 |
|
|
err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
|
| 624 |
|
|
mutex_unlock(&t->lock);
|
| 625 |
|
|
return err;
|
| 626 |
|
|
}
|
| 627 |
|
|
|
| 628 |
|
|
static int saa5249_open(struct inode *inode, struct file *file)
|
| 629 |
|
|
{
|
| 630 |
|
|
struct video_device *vd = video_devdata(file);
|
| 631 |
|
|
struct saa5249_device *t=vd->priv;
|
| 632 |
|
|
int err,pgbuf;
|
| 633 |
|
|
|
| 634 |
|
|
err = video_exclusive_open(inode,file);
|
| 635 |
|
|
if (err < 0)
|
| 636 |
|
|
return err;
|
| 637 |
|
|
|
| 638 |
|
|
if (t->client==NULL) {
|
| 639 |
|
|
err = -ENODEV;
|
| 640 |
|
|
goto fail;
|
| 641 |
|
|
}
|
| 642 |
|
|
|
| 643 |
|
|
if (i2c_senddata(t, 0, 0, -1) || /* Select R11 */
|
| 644 |
|
|
/* Turn off parity checks (we do this ourselves) */
|
| 645 |
|
|
i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
|
| 646 |
|
|
/* Display TV-picture, no virtual rows */
|
| 647 |
|
|
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 */
|
| 648 |
|
|
|
| 649 |
|
|
{
|
| 650 |
|
|
err = -EIO;
|
| 651 |
|
|
goto fail;
|
| 652 |
|
|
}
|
| 653 |
|
|
|
| 654 |
|
|
for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
|
| 655 |
|
|
{
|
| 656 |
|
|
memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
|
| 657 |
|
|
memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
|
| 658 |
|
|
memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
|
| 659 |
|
|
t->vdau[pgbuf].expire = 0;
|
| 660 |
|
|
t->vdau[pgbuf].clrfound = true;
|
| 661 |
|
|
t->vdau[pgbuf].stopped = true;
|
| 662 |
|
|
t->is_searching[pgbuf] = false;
|
| 663 |
|
|
}
|
| 664 |
|
|
t->virtual_mode = false;
|
| 665 |
|
|
return 0;
|
| 666 |
|
|
|
| 667 |
|
|
fail:
|
| 668 |
|
|
video_exclusive_release(inode,file);
|
| 669 |
|
|
return err;
|
| 670 |
|
|
}
|
| 671 |
|
|
|
| 672 |
|
|
|
| 673 |
|
|
|
| 674 |
|
|
static int saa5249_release(struct inode *inode, struct file *file)
|
| 675 |
|
|
{
|
| 676 |
|
|
struct video_device *vd = video_devdata(file);
|
| 677 |
|
|
struct saa5249_device *t=vd->priv;
|
| 678 |
|
|
i2c_senddata(t, 1, 0x20, -1); /* Turn off CCT */
|
| 679 |
|
|
i2c_senddata(t, 5, 3, 3, -1); /* Turn off TV-display */
|
| 680 |
|
|
video_exclusive_release(inode,file);
|
| 681 |
|
|
return 0;
|
| 682 |
|
|
}
|
| 683 |
|
|
|
| 684 |
|
|
static int __init init_saa_5249 (void)
|
| 685 |
|
|
{
|
| 686 |
|
|
printk(KERN_INFO "SAA5249 driver (" IF_NAME " interface) for VideoText version %d.%d\n",
|
| 687 |
|
|
VTX_VER_MAJ, VTX_VER_MIN);
|
| 688 |
|
|
return i2c_add_driver(&i2c_driver_videotext);
|
| 689 |
|
|
}
|
| 690 |
|
|
|
| 691 |
|
|
static void __exit cleanup_saa_5249 (void)
|
| 692 |
|
|
{
|
| 693 |
|
|
i2c_del_driver(&i2c_driver_videotext);
|
| 694 |
|
|
}
|
| 695 |
|
|
|
| 696 |
|
|
module_init(init_saa_5249);
|
| 697 |
|
|
module_exit(cleanup_saa_5249);
|
| 698 |
|
|
|
| 699 |
|
|
static const struct file_operations saa_fops = {
|
| 700 |
|
|
.owner = THIS_MODULE,
|
| 701 |
|
|
.open = saa5249_open,
|
| 702 |
|
|
.release = saa5249_release,
|
| 703 |
|
|
.ioctl = saa5249_ioctl,
|
| 704 |
|
|
.compat_ioctl = v4l_compat_ioctl32,
|
| 705 |
|
|
.llseek = no_llseek,
|
| 706 |
|
|
};
|
| 707 |
|
|
|
| 708 |
|
|
static struct video_device saa_template =
|
| 709 |
|
|
{
|
| 710 |
|
|
.owner = THIS_MODULE,
|
| 711 |
|
|
.name = IF_NAME,
|
| 712 |
|
|
.type = VID_TYPE_TELETEXT, /*| VID_TYPE_TUNER ?? */
|
| 713 |
|
|
.fops = &saa_fops,
|
| 714 |
|
|
};
|
| 715 |
|
|
|
| 716 |
|
|
MODULE_LICENSE("GPL");
|
