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tipar: remove obsolete module

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tipar: remove obsolete module

The tipar character driver was used to implement bit-banging access
to Texas Instruments parallel link cable. A user-land method now 
exists thru PPDEV & PARPORT.

Signed-off-by: Romain Liévin <roms@lpg.ticalc.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Romain Liévin 2007-12-01 08:51:58 +01:00 committed by Greg Kroah-Hartman
parent 8c4606b1a4
commit cb8c9b6de0
5 changed files with 0 additions and 721 deletions
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93
Documentation/tipar.txt
View file

@ -1,93 +0,0 @@
Parallel link cable for Texas Instruments handhelds
===================================================
Author: Romain Lievin
Homepage: http://lpg.ticalc.org/prj_tidev/index.html
INTRODUCTION:
This is a driver for the very common home-made parallel link cable, a cable
designed for connecting TI8x/9x graphing calculators (handhelds) to a computer
or workstation (Alpha, Sparc). Given that driver is built on parport, the
parallel port abstraction layer, this driver is architecture-independent.
It can also be used with another device plugged on the same port (such as a
ZIP drive). I have a 100MB ZIP and both of them work fine!
If you need more information, please visit the 'TI drivers' homepage at the URL
above.
WHAT YOU NEED:
A TI calculator and a program capable of communicating with your calculator.
TiLP will work for sure (since I am its developer!). yal92 may be able to use
it by changing tidev for tipar (may require some hacking...).
HOW TO USE IT:
You must have first compiled parport support (CONFIG_PARPORT_DEV): either
compiled in your kernel, either as a module.
Next, (as root):
modprobe parport
modprobe tipar
If it is not already there (it usually is), create the device:
mknod /dev/tipar0 c 115 0
mknod /dev/tipar1 c 115 1
mknod /dev/tipar2 c 115 2
You will have to set permissions on this device to allow you to read/write
from it:
chmod 666 /dev/tipar[0..2]
Now you are ready to run a linking program such as TiLP. Be sure to configure
it properly (RTFM).
MODULE PARAMETERS:
You can set these with: modprobe tipar NAME=VALUE
There is currently no way to set these on a per-cable basis.
NAME: timeout
TYPE: integer
DEFAULT: 15
DESC: Timeout value in tenth of seconds. If no data is available once this
time has expired then the driver will return with a timeout error.
NAME: delay
TYPE: integer
DEFAULT: 10
DESC: Inter-bit delay in micro-seconds. A lower value gives an higher data
rate but makes transmission less reliable.
These parameters can be changed at run time by any program via ioctl(2) calls
as listed in ./include/linux/ticable.h.
Rather than write 50 pages describing the ioctl() and so on, it is
perhaps more useful you look at ticables library (dev_link.c) that demonstrates
how to use them, and demonstrates the features of the driver. This is
probably a lot more useful to people interested in writing applications
that will be using this driver.
QUIRKS/BUGS:
None.
HOW TO CONTACT US:
You can email me at roms@lpg.ticalc.org. Please prefix the subject line
with "TIPAR: " so that I am certain to notice your message.
You can also mail JB at jb@jblache.org. He packaged these drivers for Debian.
CREDITS:
The code is based on tidev.c & parport.c.
The driver has been developed independently of Texas Instruments.

5
MAINTAINERS
View file

@ -3699,11 +3699,6 @@ M: nagar@watson.ibm.com
L: linux-kernel@vger.kernel.org
S: Maintained
TI PARALLEL LINK CABLE DRIVER
P: Romain Lievin
M: roms@lpg.ticalc.org
S: Maintained
TIPC NETWORK LAYER
P: Per Liden
M: per.liden@ericsson.com

22
drivers/char/Kconfig
View file

@ -543,28 +543,6 @@ config PPDEV
If unsure, say N.
config TIPAR
tristate "Texas Instruments parallel link cable support"
depends on PARPORT
---help---
If you own a Texas Instruments graphing calculator and use a
parallel link cable, then you might be interested in this driver.
If you enable this driver, you will be able to communicate with
your calculator through a set of device nodes under /dev. The
main advantage of this driver is that you don't have to be root
to use this precise link cable (depending on the permissions on
the device nodes, though).
To compile this driver as a module, choose M here: the
module will be called tipar.
If you don't know what a parallel link cable is or what a Texas
Instruments graphing calculator is, then you probably don't need this
driver.
If unsure, say N.
config HVC_DRIVER
bool
help

557
drivers/char/tipar.c
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@ -1,557 +0,0 @@
/* Hey EMACS -*- linux-c -*-
*
* tipar - low level driver for handling a parallel link cable designed
* for Texas Instruments graphing calculators (http://lpg.ticalc.org).
* A part of the TiLP project.
*
* Copyright (C) 2000-2002, Romain Lievin <roms@lpg.ticalc.org>
* under the terms of the GNU General Public License.
*
* Various fixes & clean-up from the Linux Kernel Mailing List
* (Alan Cox, Richard B. Johnson, Christoph Hellwig).
*/
/* This driver should, in theory, work with any parallel port that has an
* appropriate low-level driver; all I/O is done through the parport
* abstraction layer.
*
* If this driver is built into the kernel, you can configure it using the
* kernel command-line. For example:
*
* tipar=timeout,delay (set timeout and delay)
*
* If the driver is loaded as a module, similar functionality is available
* using module parameters. The equivalent of the above commands would be:
*
* # insmod tipar timeout=15 delay=10
*/
/* COMPATIBILITY WITH OLD KERNELS
*
* Usually, parallel cables were bound to ports at
* particular I/O addresses, as follows:
*
* tipar0 0x378
* tipar1 0x278
* tipar2 0x3bc
*
*
* This driver, by default, binds tipar devices according to parport and
* the minor number.
*
*/
#undef DEBUG /* change to #define to get debugging
* output - for pr_debug() */
#include <linux/module.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/fcntl.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <asm/uaccess.h>
#include <linux/ioport.h>
#include <asm/io.h>
#include <linux/bitops.h>
#include <linux/parport.h> /* Our code depend on parport */
#include <linux/device.h>
/*
* TI definitions
*/
#include <linux/ticable.h>
/*
* Version Information
*/
#define DRIVER_VERSION "1.19"
#define DRIVER_AUTHOR "Romain Lievin <roms@lpg.ticalc.org>"
#define DRIVER_DESC "Device driver for TI/PC parallel link cables"
#define DRIVER_LICENSE "GPL"
#define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
/* ----- global variables --------------------------------------------- */
struct tipar_struct {
struct pardevice *dev; /* Parport device entry */
};
#define PP_NO 3
static struct tipar_struct table[PP_NO];
static int delay = IO_DELAY; /* inter-bit delay in microseconds */
static int timeout = TIMAXTIME; /* timeout in tenth of seconds */
static unsigned int tp_count; /* tipar count */
static unsigned long opened; /* opened devices */
static struct class *tipar_class;
/* --- macros for parport access -------------------------------------- */
#define r_dtr(x) (parport_read_data(table[(x)].dev->port))
#define r_str(x) (parport_read_status(table[(x)].dev->port))
#define w_ctr(x,y) (parport_write_control(table[(x)].dev->port, (y)))
#define w_dtr(x,y) (parport_write_data(table[(x)].dev->port, (y)))
/* --- setting states on the D-bus with the right timing: ------------- */
static inline void
outbyte(int value, int minor)
{
w_dtr(minor, value);
}
static inline int
inbyte(int minor)
{
return (r_str(minor));
}
static inline void
init_ti_parallel(int minor)
{
outbyte(3, minor);
}
/* ----- global defines ----------------------------------------------- */
#define START(x) { x = jiffies + (HZ * timeout) / 10; }
#define WAIT(x) { \
if (time_before((x), jiffies)) return -1; \
if (need_resched()) schedule(); }
/* ----- D-bus bit-banging functions ---------------------------------- */
/* D-bus protocol (45kbit/s max):
1 0 0
_______ ______|______ __________|________ __________
Red : ________ | ____ | ____
_ ____________|________ ______|__________ _____
White: ________ | ______ | _______
*/
/* Try to transmit a byte on the specified port (-1 if error). */
static int
put_ti_parallel(int minor, unsigned char data)
{
unsigned int bit;
unsigned long max;
for (bit = 0; bit < 8; bit++) {
if (data & 1) {
outbyte(2, minor);
START(max);
do {
WAIT(max);
} while (inbyte(minor) & 0x10);
outbyte(3, minor);
START(max);
do {
WAIT(max);
} while (!(inbyte(minor) & 0x10));
} else {
outbyte(1, minor);
START(max);
do {
WAIT(max);
} while (inbyte(minor) & 0x20);
outbyte(3, minor);
START(max);
do {
WAIT(max);
} while (!(inbyte(minor) & 0x20));
}
data >>= 1;
udelay(delay);
if (need_resched())
schedule();
}
return 0;
}
/* Receive a byte on the specified port or -1 if error. */
static int
get_ti_parallel(int minor)
{
unsigned int bit;
unsigned char v, data = 0;
unsigned long max;
for (bit = 0; bit < 8; bit++) {
START(max);
do {
WAIT(max);
} while ((v = inbyte(minor) & 0x30) == 0x30);
if (v == 0x10) {
data = (data >> 1) | 0x80;
outbyte(1, minor);
START(max);
do {
WAIT(max);
} while (!(inbyte(minor) & 0x20));
outbyte(3, minor);
} else {
data = data >> 1;
outbyte(2, minor);
START(max);
do {
WAIT(max);
} while (!(inbyte(minor) & 0x10));
outbyte(3, minor);
}
udelay(delay);
if (need_resched())
schedule();
}
return (int) data;
}
/* Try to detect a parallel link cable on the specified port */
static int
probe_ti_parallel(int minor)
{
int i;
int seq[] = { 0x00, 0x20, 0x10, 0x30 };
int data;
for (i = 3; i >= 0; i--) {
outbyte(3, minor);
outbyte(i, minor);
udelay(delay);
data = inbyte(minor) & 0x30;
pr_debug("tipar: Probing -> %i: 0x%02x 0x%02x\n", i,
data, seq[i]);
if (data != seq[i]) {
outbyte(3, minor);
return -1;
}
}
outbyte(3, minor);
return 0;
}
/* ----- kernel module functions--------------------------------------- */
static int
tipar_open(struct inode *inode, struct file *file)
{
unsigned int minor = iminor(inode) - TIPAR_MINOR;
if (tp_count == 0 || minor > tp_count - 1)
return -ENXIO;
if (test_and_set_bit(minor, &opened))
return -EBUSY;
if (!table[minor].dev) {
printk(KERN_ERR "%s: NULL device for minor %u\n",
__FUNCTION__, minor);
return -ENXIO;
}
parport_claim_or_block(table[minor].dev);
init_ti_parallel(minor);
parport_release(table[minor].dev);
return nonseekable_open(inode, file);
}
static int
tipar_close(struct inode *inode, struct file *file)
{
unsigned int minor = iminor(inode) - TIPAR_MINOR;
if (minor > tp_count - 1)
return -ENXIO;
clear_bit(minor, &opened);
return 0;
}
static ssize_t
tipar_write (struct file *file, const char __user *buf, size_t count,
loff_t * ppos)
{
unsigned int minor = iminor(file->f_path.dentry->d_inode) - TIPAR_MINOR;
ssize_t n;
parport_claim_or_block(table[minor].dev);
for (n = 0; n < count; n++) {
unsigned char b;
if (get_user(b, buf + n)) {
n = -EFAULT;
goto out;
}
if (put_ti_parallel(minor, b) == -1) {
init_ti_parallel(minor);
n = -ETIMEDOUT;
goto out;
}
}
out:
parport_release(table[minor].dev);
return n;
}
static ssize_t
tipar_read(struct file *file, char __user *buf, size_t count, loff_t * ppos)
{
int b = 0;
unsigned int minor = iminor(file->f_path.dentry->d_inode) - TIPAR_MINOR;
ssize_t retval = 0;
ssize_t n = 0;
if (count == 0)
return 0;
parport_claim_or_block(table[minor].dev);
while (n < count) {
b = get_ti_parallel(minor);
if (b == -1) {
init_ti_parallel(minor);
retval = -ETIMEDOUT;
goto out;
} else {
if (put_user(b, buf + n)) {
retval = -EFAULT;
break;
} else
retval = ++n;
}
/* Non-blocking mode : try again ! */
if (file->f_flags & O_NONBLOCK) {
retval = -EAGAIN;
goto out;
}
/* Signal pending, try again ! */
if (signal_pending(current)) {
retval = -ERESTARTSYS;
goto out;
}
if (need_resched())
schedule();
}
out:
parport_release(table[minor].dev);
return retval;
}
static int
tipar_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
int retval = 0;
switch (cmd) {
case IOCTL_TIPAR_DELAY:
delay = (int)arg; //get_user(delay, &arg);
break;
case IOCTL_TIPAR_TIMEOUT:
if (arg != 0)
timeout = (int)arg;
else
retval = -EINVAL;
break;
default:
retval = -ENOTTY;
break;
}
return retval;
}
/* ----- kernel module registering ------------------------------------ */
static const struct file_operations tipar_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = tipar_read,
.write = tipar_write,
.ioctl = tipar_ioctl,
.open = tipar_open,
.release = tipar_close,
};
/* --- initialisation code ------------------------------------- */
#ifndef MODULE
/* You must set these - there is no sane way to probe for this cable.
* You can use 'tipar=timeout,delay' to set these now. */
static int __init
tipar_setup(char *str)
{
int ints[3];
str = get_options(str, ARRAY_SIZE(ints), ints);
if (ints[0] > 0) {
if (ints[1] != 0)
timeout = ints[1];
else
printk(KERN_WARNING "tipar: bad timeout value (0), "
"using default value instead");
if (ints[0] > 1) {
delay = ints[2];
}
}
return 1;
}
#endif
/*
* Register our module into parport.
* Pass also 2 callbacks functions to parport: a pre-emptive function and an
* interrupt handler function (unused).
* Display a message such "tipar0: using parport0 (polling)".
*/
static int
tipar_register(int nr, struct parport *port)
{
int err = 0;
/* Register our module into parport */
table[nr].dev = parport_register_device(port, "tipar",
NULL, NULL, NULL, 0,
(void *) &table[nr]);
if (table[nr].dev == NULL) {
err = 1;
goto out;
}
device_create(tipar_class, port->dev, MKDEV(TIPAR_MAJOR,
TIPAR_MINOR + nr), "par%d", nr);
/* Display informations */
pr_info("tipar%d: using %s (%s)\n", nr, port->name, (port->irq ==
PARPORT_IRQ_NONE) ? "polling" : "interrupt-driven");
if (probe_ti_parallel(nr) != -1)
pr_info("tipar%d: link cable found\n", nr);
else
pr_info("tipar%d: link cable not found\n", nr);
err = 0;
out:
return err;
}
static void
tipar_attach(struct parport *port)
{
if (tp_count == PP_NO) {
pr_info("tipar: ignoring parallel port (max. %d)\n", PP_NO);
return;
}
if (!tipar_register(tp_count, port))
tp_count++;
}
static void
tipar_detach(struct parport *port)
{
/* Nothing to do */
}
static struct parport_driver tipar_driver = {
.name = "tipar",
.attach = tipar_attach,
.detach = tipar_detach,
};
static int __init
tipar_init_module(void)
{
int err = 0;
pr_info("tipar: parallel link cable driver, version %s\n",
DRIVER_VERSION);
if (register_chrdev(TIPAR_MAJOR, "tipar", &tipar_fops)) {
printk(KERN_ERR "tipar: unable to get major %d\n", TIPAR_MAJOR);
err = -EIO;
goto out;
}
tipar_class = class_create(THIS_MODULE, "ticables");
if (IS_ERR(tipar_class)) {
err = PTR_ERR(tipar_class);
goto out_chrdev;
}
if (parport_register_driver(&tipar_driver)) {
printk(KERN_ERR "tipar: unable to register with parport\n");
err = -EIO;
goto out_class;
}
err = 0;
goto out;
out_class:
class_destroy(tipar_class);
out_chrdev:
unregister_chrdev(TIPAR_MAJOR, "tipar");
out:
return err;
}
static void __exit
tipar_cleanup_module(void)
{
unsigned int i;
/* Unregistering module */
parport_unregister_driver(&tipar_driver);
unregister_chrdev(TIPAR_MAJOR, "tipar");
for (i = 0; i < PP_NO; i++) {
if (table[i].dev == NULL)
continue;
parport_unregister_device(table[i].dev);
device_destroy(tipar_class, MKDEV(TIPAR_MAJOR, i));
}
class_destroy(tipar_class);
pr_info("tipar: module unloaded\n");
}
/* --------------------------------------------------------------------- */
__setup("tipar=", tipar_setup);
module_init(tipar_init_module);
module_exit(tipar_cleanup_module);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE(DRIVER_LICENSE);
module_param(timeout, int, 0);
MODULE_PARM_DESC(timeout, "Timeout (default=1.5 seconds)");
module_param(delay, int, 0);
MODULE_PARM_DESC(delay, "Inter-bit delay (default=10 microseconds)");

44
include/linux/ticable.h
View file

@ -1,44 +0,0 @@
/* Hey EMACS -*- linux-c -*-
*
* tipar/tiser/tiusb - low level driver for handling link cables
* designed for Texas Instruments graphing calculators.
*
* Copyright (C) 2000-2002, Romain Lievin <roms@lpg.ticalc.org>
*
* Redistribution of this file is permitted under the terms of the GNU
* Public License (GPL)
*/
#ifndef _TICABLE_H
#define _TICABLE_H 1
/* Internal default constants for the kernel module */
#define TIMAXTIME 15 /* 1.5 seconds */
#define IO_DELAY 10 /* 10 micro-seconds */
/* Major & minor number for character devices */
#define TIPAR_MAJOR 115 /* 0 to 7 */
#define TIPAR_MINOR 0
#define TISER_MAJOR 115 /* 8 to 15 */
#define TISER_MINOR 8
#define TIUSB_MAJOR 115 /* 16 to 31 */
#define TIUSB_MINOR 16
/*
* Request values for the 'ioctl' function.
*/
#define IOCTL_TIPAR_DELAY _IOW('p', 0xa8, int) /* set delay */
#define IOCTL_TIPAR_TIMEOUT _IOW('p', 0xa9, int) /* set timeout */
#define IOCTL_TISER_DELAY _IOW('p', 0xa0, int) /* set delay */
#define IOCTL_TISER_TIMEOUT _IOW('p', 0xa1, int) /* set timeout */
#define IOCTL_TIUSB_TIMEOUT _IOW('N', 0x20, int) /* set timeout */
#define IOCTL_TIUSB_RESET_DEVICE _IOW('N', 0x21, int) /* reset device */
#define IOCTL_TIUSB_RESET_PIPES _IOW('N', 0x22, int) /* reset both pipes*/
#define IOCTL_TIUSB_GET_MAXPS _IOR('N', 0x23, int) /* max packet size */
#define IOCTL_TIUSB_GET_DEVID _IOR('N', 0x24, int) /* get device type */
#endif /* TICABLE_H */