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path: root/drivers/usb/class/cdc-acm.c
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Diffstat (limited to 'drivers/usb/class/cdc-acm.c')
-rw-r--r--drivers/usb/class/cdc-acm.c38
1 files changed, 30 insertions, 8 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 9543b19d410..b32ccb46101 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -39,6 +39,7 @@
#include <linux/serial.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
+#include <linux/serial.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/uaccess.h>
@@ -508,17 +509,12 @@ static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
if (!acm)
return -ENODEV;
- retval = tty_init_termios(tty);
+ retval = tty_standard_install(driver, tty);
if (retval)
goto error_init_termios;
tty->driver_data = acm;
- /* Final install (we use the default method) */
- tty_driver_kref_get(driver);
- tty->count++;
- driver->ttys[tty->index] = tty;
-
return 0;
error_init_termios:
@@ -773,10 +769,37 @@ static int acm_tty_tiocmset(struct tty_struct *tty,
return acm_set_control(acm, acm->ctrlout = newctrl);
}
+static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
+{
+ struct serial_struct tmp;
+
+ if (!info)
+ return -EINVAL;
+
+ memset(&tmp, 0, sizeof(tmp));
+ tmp.flags = ASYNC_LOW_LATENCY;
+ tmp.xmit_fifo_size = acm->writesize;
+ tmp.baud_base = le32_to_cpu(acm->line.dwDTERate);
+
+ if (copy_to_user(info, &tmp, sizeof(tmp)))
+ return -EFAULT;
+ else
+ return 0;
+}
+
static int acm_tty_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg)
{
- return -ENOIOCTLCMD;
+ struct acm *acm = tty->driver_data;
+ int rv = -ENOIOCTLCMD;
+
+ switch (cmd) {
+ case TIOCGSERIAL: /* gets serial port data */
+ rv = get_serial_info(acm, (struct serial_struct __user *) arg);
+ break;
+ }
+
+ return rv;
}
static const __u32 acm_tty_speed[] = {
@@ -1675,7 +1698,6 @@ static int __init acm_init(void)
acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS);
if (!acm_tty_driver)
return -ENOMEM;
- acm_tty_driver->owner = THIS_MODULE,
acm_tty_driver->driver_name = "acm",
acm_tty_driver->name = "ttyACM",
acm_tty_driver->major = ACM_TTY_MAJOR,