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-rw-r--r--tty/tiny_tty.c123
1 files changed, 64 insertions, 59 deletions
diff --git a/tty/tiny_tty.c b/tty/tiny_tty.c
index 889c789..add9522 100644
--- a/tty/tiny_tty.c
+++ b/tty/tiny_tty.c
@@ -24,19 +24,18 @@
#include <linux/serial.h>
#include <linux/sched.h>
#include <linux/seq_file.h>
-#include <asm/uaccess.h>
-
+#include <linux/uaccess.h>
#define DRIVER_VERSION "v2.0"
#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>"
#define DRIVER_DESC "Tiny TTY driver"
/* Module information */
-MODULE_AUTHOR( DRIVER_AUTHOR );
-MODULE_DESCRIPTION( DRIVER_DESC );
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
-#define DELAY_TIME HZ * 2 /* 2 seconds per character */
+#define DELAY_TIME (HZ * 2) /* 2 seconds per character */
#define TINY_DATA_CHARACTER 't'
#define TINY_TTY_MAJOR 240 /* experimental range */
@@ -59,6 +58,7 @@ struct tiny_serial {
};
static struct tiny_serial *tiny_table[TINY_TTY_MINORS]; /* initially all NULL */
+static struct tty_port tiny_tty_port[TINY_TTY_MINORS];
static void tiny_timer(unsigned long timer_data)
@@ -135,9 +135,10 @@ static int tiny_open(struct tty_struct *tty, struct file *file)
}
tiny->timer = timer;
}
- tiny->timer->data = (unsigned long )tiny;
+ tiny->timer->data = (unsigned long)tiny;
tiny->timer->expires = jiffies + DELAY_TIME;
tiny->timer->function = tiny_timer;
+ init_timer(tiny->timer);
add_timer(tiny->timer);
}
@@ -172,9 +173,9 @@ static void tiny_close(struct tty_struct *tty, struct file *file)
if (tiny)
do_close(tiny);
-}
+}
-static int tiny_write(struct tty_struct *tty,
+static int tiny_write(struct tty_struct *tty,
const unsigned char *buffer, int count)
{
struct tiny_serial *tiny = tty->driver_data;
@@ -193,17 +194,17 @@ static int tiny_write(struct tty_struct *tty,
/* fake sending the data out a hardware port by
* writing it to the kernel debug log.
*/
- printk(KERN_DEBUG "%s - ", __FUNCTION__);
+ pr_debug("%s - ", __func__);
for (i = 0; i < count; ++i)
- printk("%02x ", buffer[i]);
- printk("\n");
-
+ pr_info("%02x ", buffer[i]);
+ pr_info("\n");
+
exit:
up(&tiny->sem);
return retval;
}
-static int tiny_write_room(struct tty_struct *tty)
+static int tiny_write_room(struct tty_struct *tty)
{
struct tiny_serial *tiny = tty->driver_data;
int room = -EINVAL;
@@ -212,7 +213,7 @@ static int tiny_write_room(struct tty_struct *tty)
return -ENODEV;
down(&tiny->sem);
-
+
if (!tiny->open_count) {
/* port was not opened */
goto exit;
@@ -239,51 +240,51 @@ static void tiny_set_termios(struct tty_struct *tty, struct ktermios *old_termio
if ((cflag == old_termios->c_cflag) &&
(RELEVANT_IFLAG(tty->termios.c_iflag) ==
RELEVANT_IFLAG(old_termios->c_iflag))) {
- printk(KERN_DEBUG " - nothing to change...\n");
+ pr_debug(" - nothing to change...\n");
return;
}
}
/* get the byte size */
switch (cflag & CSIZE) {
- case CS5:
- printk(KERN_DEBUG " - data bits = 5\n");
- break;
- case CS6:
- printk(KERN_DEBUG " - data bits = 6\n");
- break;
- case CS7:
- printk(KERN_DEBUG " - data bits = 7\n");
- break;
- default:
- case CS8:
- printk(KERN_DEBUG " - data bits = 8\n");
- break;
+ case CS5:
+ pr_debug(" - data bits = 5\n");
+ break;
+ case CS6:
+ pr_debug(" - data bits = 6\n");
+ break;
+ case CS7:
+ pr_debug(" - data bits = 7\n");
+ break;
+ default:
+ case CS8:
+ pr_debug(" - data bits = 8\n");
+ break;
}
-
+
/* determine the parity */
if (cflag & PARENB)
if (cflag & PARODD)
- printk(KERN_DEBUG " - parity = odd\n");
+ pr_debug(" - parity = odd\n");
else
- printk(KERN_DEBUG " - parity = even\n");
+ pr_debug(" - parity = even\n");
else
- printk(KERN_DEBUG " - parity = none\n");
+ pr_debug(" - parity = none\n");
/* figure out the stop bits requested */
if (cflag & CSTOPB)
- printk(KERN_DEBUG " - stop bits = 2\n");
+ pr_debug(" - stop bits = 2\n");
else
- printk(KERN_DEBUG " - stop bits = 1\n");
+ pr_debug(" - stop bits = 1\n");
/* figure out the hardware flow control settings */
if (cflag & CRTSCTS)
- printk(KERN_DEBUG " - RTS/CTS is enabled\n");
+ pr_debug(" - RTS/CTS is enabled\n");
else
- printk(KERN_DEBUG " - RTS/CTS is disabled\n");
-
+ pr_debug(" - RTS/CTS is disabled\n");
+
/* determine software flow control */
- /* if we are implementing XON/XOFF, set the start and
+ /* if we are implementing XON/XOFF, set the start and
* stop character in the device */
if (I_IXOFF(tty) || I_IXON(tty)) {
unsigned char stop_char = STOP_CHAR(tty);
@@ -291,21 +292,21 @@ static void tiny_set_termios(struct tty_struct *tty, struct ktermios *old_termio
/* if we are implementing INBOUND XON/XOFF */
if (I_IXOFF(tty))
- printk(KERN_DEBUG " - INBOUND XON/XOFF is enabled, "
+ pr_debug(" - INBOUND XON/XOFF is enabled, "
"XON = %2x, XOFF = %2x", start_char, stop_char);
else
- printk(KERN_DEBUG" - INBOUND XON/XOFF is disabled");
+ pr_debug(" - INBOUND XON/XOFF is disabled");
/* if we are implementing OUTBOUND XON/XOFF */
if (I_IXON(tty))
- printk(KERN_DEBUG" - OUTBOUND XON/XOFF is enabled, "
+ pr_debug(" - OUTBOUND XON/XOFF is enabled, "
"XON = %2x, XOFF = %2x", start_char, stop_char);
else
- printk(KERN_DEBUG" - OUTBOUND XON/XOFF is disabled");
+ pr_debug(" - OUTBOUND XON/XOFF is disabled");
}
/* get the baud rate wanted */
- printk(KERN_DEBUG " - baud rate = %d", tty_get_baud_rate(tty));
+ pr_debug(" - baud rate = %d", tty_get_baud_rate(tty));
}
/* Our fake UART values */
@@ -326,12 +327,12 @@ static int tiny_tiocmget(struct tty_struct *tty)
unsigned int mcr = tiny->mcr;
result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) | /* DTR is set */
- ((mcr & MCR_RTS) ? TIOCM_RTS : 0) | /* RTS is set */
- ((mcr & MCR_LOOP) ? TIOCM_LOOP : 0) | /* LOOP is set */
- ((msr & MSR_CTS) ? TIOCM_CTS : 0) | /* CTS is set */
- ((msr & MSR_CD) ? TIOCM_CAR : 0) | /* Carrier detect is set*/
- ((msr & MSR_RI) ? TIOCM_RI : 0) | /* Ring Indicator is set */
- ((msr & MSR_DSR) ? TIOCM_DSR : 0); /* DSR is set */
+ ((mcr & MCR_RTS) ? TIOCM_RTS : 0) | /* RTS is set */
+ ((mcr & MCR_LOOP) ? TIOCM_LOOP : 0) | /* LOOP is set */
+ ((msr & MSR_CTS) ? TIOCM_CTS : 0) | /* CTS is set */
+ ((msr & MSR_CD) ? TIOCM_CAR : 0) | /* Carrier detect is set*/
+ ((msr & MSR_RI) ? TIOCM_RI : 0) | /* Ring Indicator is set */
+ ((msr & MSR_DSR) ? TIOCM_DSR : 0); /* DSR is set */
return result;
}
@@ -438,7 +439,7 @@ static int tiny_ioctl(struct tty_struct *tty, unsigned int cmd,
if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
- ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
+ ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
return 0;
}
cprev = cnow;
@@ -497,19 +498,19 @@ static int tiny_ioctl(struct tty_struct *tty, unsigned int cmd,
static int tiny_proc_open(struct inode *inode, struct file *file)
{
- return single_open(file, tiny_proc_show, NULL);
+ return single_open(file, tiny_proc_show, NULL);
}
static const struct file_operations serial_proc_fops = {
- .owner = THIS_MODULE,
- .open = tiny_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
+ .owner = THIS_MODULE,
+ .open = tiny_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
};
-static struct tty_operations serial_ops = {
+static const struct tty_operations serial_ops = {
.open = tiny_open,
.close = tiny_close,
.write = tiny_write,
@@ -544,11 +545,15 @@ static int __init tiny_init(void)
tiny_tty_driver->init_termios = tty_std_termios;
tiny_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
tty_set_operations(tiny_tty_driver, &serial_ops);
+ for (i = 0; i < TINY_TTY_MINORS; i++) {
+ tty_port_init(tiny_tty_port + i);
+ tty_port_link_device(tiny_tty_port + i, tiny_tty_driver, i);
+ }
/* register the tty driver */
retval = tty_register_driver(tiny_tty_driver);
if (retval) {
- printk(KERN_ERR "failed to register tiny tty driver");
+ pr_err("failed to register tiny tty driver");
put_tty_driver(tiny_tty_driver);
return retval;
}
@@ -556,7 +561,7 @@ static int __init tiny_init(void)
for (i = 0; i < TINY_TTY_MINORS; ++i)
tty_register_device(tiny_tty_driver, i, NULL);
- printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION);
+ pr_info(DRIVER_DESC " " DRIVER_VERSION);
return retval;
}
generated by cgit v1.2.1-18-gbd029 (git 2.20.0) at 2025-06-15 20:49:34 +0000