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path: root/drivers/usb/serial/console.c
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Diffstat (limited to 'drivers/usb/serial/console.c')
-rw-r--r--drivers/usb/serial/console.c56
1 files changed, 45 insertions, 11 deletions
diff --git a/drivers/usb/serial/console.c b/drivers/usb/serial/console.c
index 8023bb7279b..f3404e10afb 100644
--- a/drivers/usb/serial/console.c
+++ b/drivers/usb/serial/console.c
@@ -202,7 +202,7 @@ static void usb_console_write(struct console *co, const char *buf, unsigned coun
struct usb_serial *serial;
int retval = -ENODEV;
- if (!port)
+ if (!port || port->serial->dev->state == USB_STATE_NOTATTACHED)
return;
serial = port->serial;
@@ -213,17 +213,38 @@ static void usb_console_write(struct console *co, const char *buf, unsigned coun
if (!port->open_count) {
dbg ("%s - port not opened", __FUNCTION__);
- goto exit;
+ return;
}
- /* pass on to the driver specific version of this function if it is available */
- if (serial->type->write)
- retval = serial->type->write(port, buf, count);
- else
- retval = usb_serial_generic_write(port, buf, count);
-
-exit:
- dbg("%s - return value (if we had one): %d", __FUNCTION__, retval);
+ while (count) {
+ unsigned int i;
+ unsigned int lf;
+ /* search for LF so we can insert CR if necessary */
+ for (i=0, lf=0 ; i < count ; i++) {
+ if (*(buf + i) == 10) {
+ lf = 1;
+ i++;
+ break;
+ }
+ }
+ /* pass on to the driver specific version of this function if it is available */
+ if (serial->type->write)
+ retval = serial->type->write(port, buf, i);
+ else
+ retval = usb_serial_generic_write(port, buf, i);
+ dbg("%s - return value : %d", __FUNCTION__, retval);
+ if (lf) {
+ /* append CR after LF */
+ unsigned char cr = 13;
+ if (serial->type->write)
+ retval = serial->type->write(port, &cr, 1);
+ else
+ retval = usb_serial_generic_write(port, &cr, 1);
+ dbg("%s - return value : %d", __FUNCTION__, retval);
+ }
+ buf += i;
+ count -= i;
+ }
}
static struct console usbcons = {
@@ -234,6 +255,14 @@ static struct console usbcons = {
.index = -1,
};
+void usb_serial_console_disconnect(struct usb_serial *serial)
+{
+ if (serial && serial->port && serial->port[0] && serial->port[0] == usbcons_info.port) {
+ usb_serial_console_exit();
+ usb_serial_put(serial);
+ }
+}
+
void usb_serial_console_init (int serial_debug, int minor)
{
debug = serial_debug;
@@ -259,6 +288,11 @@ void usb_serial_console_init (int serial_debug, int minor)
void usb_serial_console_exit (void)
{
- unregister_console(&usbcons);
+ if (usbcons_info.port) {
+ unregister_console(&usbcons);
+ if (usbcons_info.port->open_count)
+ usbcons_info.port->open_count--;
+ usbcons_info.port = NULL;
+ }
}