Hi all,
I've stumbled across serial port driver that was written for 2.6.10 kernel [1].
Since the time that 2.6.10 was released a lot of changes in serial / tty layers were committed to the mainline.
I've managed to make a initial port to 2.6.26, but I'm not sure if I made (all) the changes that were needed. I've attached the patch for you to review - any comments are welcomed.
Best regards,
Hinko
[1]: http://koti.mbnet.fi/toukka/ussp26-10.tar.gz
--
ČETRTA POT, d.o.o., Kranj
Planina 3
4000 Kranj
Slovenia, Europe
Tel. +386 (0) 4 280 66 03
E-mail: hinko.kocevar@xxxxxxxxxxxx
Http: www.cetrtapot.si
diff -urN ussp26-10/Makefile ussp26-26/Makefile
--- ussp26-10/Makefile 2005-03-08 23:08:01.000000000 +0100
+++ ussp26-26/Makefile 2008-07-08 13:23:02.000000000 +0200
@@ -1,6 +1,7 @@
obj-m += ussp.o
default:
- make -C /lib/modules/$(shell uname -r)/build/ SUBDIRS=$(PWD) modules
+ make -C $(shell pwd)/../linux-2.6/ SUBDIRS=$(PWD) modules
clean:
rm ussp.o ussp.ko ussp.mod* .ussp.*
rm -r .tmp_versions
+ rm -f [Mm]odule*
diff -urN ussp26-10/ussp.c ussp26-26/ussp.c
--- ussp26-10/ussp.c 2005-03-08 22:46:08.000000000 +0100
+++ ussp26-26/ussp.c 2008-07-08 13:25:02.000000000 +0200
@@ -53,7 +53,7 @@
#define RCS_ID "$Id: ussp.c,v 1.5 2005/03/08 22:00:02 jth Exp $"
#define RCS_REV "$Revision: 1.5 $"
-#include <linux/config.h>
+//#include <linux/config.h>
#include <linux/ctype.h>
#if 0
@@ -66,6 +66,7 @@
#endif
#include <linux/module.h>
+#include <linux/moduleparam.h>
#include <linux/kdev_t.h>
#include <asm/io.h>
#include <linux/kernel.h>
@@ -115,8 +116,11 @@
/* Configurable options:
(Don't be too sure that it'll work if you toggle them) */
-MODULE_PARM(ussp_debug, "i");
-MODULE_PARM(ussp_set_lowlatency, "i");
+//MODULE_PARM(ussp_debug, "i");
+//MODULE_PARM(ussp_set_lowlatency, "i");
+/* what is wrong with this lines ??? */
+//module_parm(ussp_debug, int, 0);
+//module_parm(ussp_set_lowlatency, int, 0);
MODULE_AUTHOR("R.E.Wolff@xxxxxxxxxxxx, patrick@xxxxxxxxxxxx");
MODULE_DESCRIPTION("User Space Serial Ports");
@@ -145,7 +149,6 @@
release: ussp_ctl_close
};
-
struct miscdevice ussp_ctl_device = {
USSPCTL_MISC_MINOR, "ussp_ctl", &ussp_ctl_fops
};
@@ -224,14 +227,14 @@
static void ussp_tty_close (struct tty_struct *, struct file *);
static int ussp_tty_write_room (struct tty_struct * );
static int ussp_tty_chars_in_buffer (struct tty_struct * );
-static void ussp_tty_put_char (struct tty_struct *, unsigned char);
+static int ussp_tty_put_char (struct tty_struct *, unsigned char);
void ussp_tty_flush_buffer (struct tty_struct *tty);
void ussp_tty_flush_chars (struct tty_struct *tty);
void ussp_tty_stop (struct tty_struct *tty);
void ussp_tty_start (struct tty_struct *tty);
void ussp_tty_set_termios (struct tty_struct * tty,
- struct termios * old_termios);
+ struct ktermios * old_termios);
void ussp_tty_hangup (struct tty_struct *tty);
struct ussp_port ussp_ports[USSP_MAX_PORTS];
@@ -240,8 +243,8 @@
static struct tty_driver ussp_driver;
static struct tty_struct * ussp_table[USSP_MAX_PORTS] = { NULL, };
-static struct termios * ussp_termios[USSP_MAX_PORTS];
-static struct termios * ussp_termios_locked[USSP_MAX_PORTS];
+static struct ktermios * ussp_termios[USSP_MAX_PORTS];
+static struct ktermios * ussp_termios_locked[USSP_MAX_PORTS];
#define D_DATA_AVAILABLE(port) ((port->daemon_head - port->daemon_tail) & (PAGE_SIZE-1))
#define TTY_DATA_AVAILABLE(port) ((port->tty_head - port->tty_tail) & (PAGE_SIZE-1))
@@ -312,6 +315,24 @@
+static struct tty_operations ttyops = {
+ .open = ussp_tty_open,
+ .close = ussp_tty_close,
+ .write = ussp_tty_write,
+ .put_char = ussp_tty_put_char,
+ .flush_chars = ussp_tty_flush_chars,
+ .write_room = ussp_tty_write_room,
+ .chars_in_buffer = ussp_tty_chars_in_buffer,
+ .flush_buffer = ussp_tty_flush_buffer,
+ .ioctl = ussp_tty_ioctl,
+ .throttle = ussp_dummy,
+ .unthrottle = ussp_dummy,
+ .set_termios = ussp_tty_set_termios,
+ .stop = ussp_tty_stop,
+ .start = ussp_tty_start,
+ .hangup = ussp_tty_hangup,
+};
+
int ussp_init (void)
{
int status;
@@ -340,7 +361,7 @@
ussp_driver.termios = ussp_termios;
ussp_driver.termios_locked = ussp_termios_locked;
- ussp_driver.open = ussp_tty_open;
+/* ussp_driver.open = ussp_tty_open;
ussp_driver.close = ussp_tty_close;
ussp_driver.write = ussp_tty_write;
ussp_driver.put_char = ussp_tty_put_char;
@@ -355,6 +376,8 @@
ussp_driver.stop = ussp_tty_stop;
ussp_driver.start = ussp_tty_start;
ussp_driver.hangup = ussp_tty_hangup;
+*/
+ ussp_driver.ops = &ttyops;
status = tty_register_driver (&ussp_driver);
//printk (KERN_INFO "Return value registering: %d\n", status);
@@ -547,7 +570,7 @@
void ussp_tty_set_termios (struct tty_struct * tty,
- struct termios * old_termios)
+ struct ktermios * old_termios)
{
func_enter ();
@@ -579,7 +602,7 @@
}
-static void ussp_tty_put_char (struct tty_struct * tty, unsigned char ch)
+static int ussp_tty_put_char (struct tty_struct * tty, unsigned char ch)
{
char tempchar = ch;
int count;
@@ -591,7 +614,7 @@
count = ussp_tty_write (tty, &tempchar, 1);
ussp_dprintk (DEBUG_WRITE_TO_CTL, "writing char: %c %d\n", ch, count);
func_exit ();
- return;
+ return count;
}
@@ -671,7 +694,8 @@
ussp_dprintk(DEBUG_OPEN, "Daemon returned error.\n");
return -EINTR;
}
-
+/*
+
ussp_dprintk (DEBUG_OPEN, "current->signal->leader: %d current->signal->tty: %d tty->session: %d\n", (int)current->signal->leader, (int)current->signal->tty, (int)tty->session);
if (current->signal->leader && !current->signal->tty && tty->session == 0){
ussp_dprintk (DEBUG_OPEN, "setting!\n");
@@ -680,7 +704,7 @@
tty->session = current->signal->session;
tty->pgrp = process_group(current);
}
-
+*/
func_exit();
return op.arg;
}
@@ -754,13 +778,15 @@
break;
case TIOCSSOFTCAR:
- if ((rc = verify_area(VERIFY_READ, (void *) arg,
+ /* verify_area() function will go away soon - use access_ok() instead */
+/* if ((rc = verify_area(VERIFY_READ, (void *) arg,
sizeof(int))) == 0) {
get_user(ival, (unsigned int *) arg);
tty->termios->c_cflag =
(tty->termios->c_cflag & ~CLOCAL) |
(ival ? CLOCAL : 0);
}
+*/
break;
case TIOCMGET:
ussp_dprintk (DEBUG_IOCTL, "TIOCMGET\n");
@@ -977,6 +1003,7 @@
int rc;
struct ussp_operation op;
struct ussp_port *port;
+ char *buff;
func_enter();
port = filp->private_data;
@@ -1011,13 +1038,19 @@
break;
case USSP_READ:
ussp_dprintk (DEBUG_IOCTL, "USSP_READ %d\n", (int)op.len);
- rc = copy_from_user (port->tty->flip.char_buf_ptr, buf + sizeof(struct ussp_operation), op.len);
- memset(port->tty->flip.flag_buf_ptr, TTY_NORMAL, op.len);
- port->tty->flip.count += op.len;
- port->tty->flip.char_buf_ptr += op.len;
- port->tty->flip.flag_buf_ptr += op.len;
+ buff = kmalloc((int)op.len, GFP_KERNEL);
+// rc = copy_from_user (port->tty->flip.char_buf_ptr, buf + sizeof(struct ussp_operation), op.len);
+// memset(port->tty->flip.flag_buf_ptr, TTY_NORMAL, op.len);
+// port->tty->flip.count += op.len;
+// port->tty->flip.char_buf_ptr += op.len;
+// port->tty->flip.flag_buf_ptr += op.len;
+ rc = tty_buffer_request_room(port->tty, (int)op.len);
+ if (rc > 0)
+ tty_insert_flip_string(port->tty, buff, (int)op.len);
+ tty_insert_flip_char(port->tty, 0, TTY_NORMAL);
tty_flip_buffer_push (port->tty);
port->stats.rxcount += op.len;
+ kfree(buff);
break;
case USSP_FORCE_CLOSE:
ussp_dprintk (USSP_CLOSE, "USSP_FORCE_CLOSE %d\n", (int)op.arg);
diff -urN ussp26-10/ussp.h ussp26-26/ussp.h
--- ussp26-10/ussp.h 2004-04-21 18:55:10.000000000 +0200
+++ ussp26-26/ussp.h 2008-07-08 11:44:11.000000000 +0200
@@ -74,8 +74,8 @@
struct stats stats;
int deamon_pid;
- struct termios normal_termios;
- struct termios callout_termios;
+ struct ktermios normal_termios;
+ struct ktermios callout_termios;
struct tty_struct *tty;
};
#endif
