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Commit e7806e36 authored by Alan Cox's avatar Alan Cox Committed by Greg Kroah-Hartman
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USB: keyspan_pda: clean up speed handling 



Signed-off-by: default avatarAlan Cox <alan@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 3ec466b4

drivers/usb/serial/keyspan_pda.c

+19 −19
Original line number Diff line number Diff line
@@ -303,7 +303,7 @@ static void keyspan_pda_rx_unthrottle (struct usb_serial_port *port) 
}





static int keyspan_pda_setbaud (struct usb_serial *serial, int baud)

static speed_t keyspan_pda_setbaud (struct usb_serial *serial, speed_t baud)

{

	int rc;

	int bindex;
@@ -319,7 +319,9 @@ static int keyspan_pda_setbaud (struct usb_serial *serial, int baud) 
		case 38400: bindex = 7; break;

		case 57600: bindex = 8; break;

		case 115200: bindex = 9; break;

		default: return -EINVAL;

		default:

			bindex = 5;	/* Default to 9600 */

			baud = 9600;

	}



	/* rather than figure out how to sleep while waiting for this
@@ -334,7 +336,9 @@ static int keyspan_pda_setbaud (struct usb_serial *serial, int baud) 
			     NULL, /* &data */

			     0, /* size */

			     2000); /* timeout */

	return(rc);

	if (rc < 0)

		return 0;

	return baud;

}
@@ -366,7 +370,7 @@ static void keyspan_pda_set_termios (struct usb_serial_port *port, 
				     struct ktermios *old_termios)

{

	struct usb_serial *serial = port->serial;

	unsigned int cflag = port->tty->termios->c_cflag;

	speed_t speed;



	/* cflag specifies lots of stuff: number of stop bits, parity, number

	   of data bits, baud. What can the device actually handle?:
@@ -388,22 +392,18 @@ static void keyspan_pda_set_termios (struct usb_serial_port *port, 


	   For now, just do baud. */



	switch (cflag & CBAUD) {

		/* we could support more values here, just need to calculate

		   the necessary divisors in the firmware. <asm/termbits.h>

		   has the Bnnn constants. */

		case B110: keyspan_pda_setbaud(serial, 110); break;

		case B300: keyspan_pda_setbaud(serial, 300); break;

		case B1200: keyspan_pda_setbaud(serial, 1200); break;

		case B2400: keyspan_pda_setbaud(serial, 2400); break;

		case B4800: keyspan_pda_setbaud(serial, 4800); break;

		case B9600: keyspan_pda_setbaud(serial, 9600); break;

		case B19200: keyspan_pda_setbaud(serial, 19200); break;

		case B38400: keyspan_pda_setbaud(serial, 38400); break;

		case B57600: keyspan_pda_setbaud(serial, 57600); break;

		case B115200: keyspan_pda_setbaud(serial, 115200); break;

		default: dbg("can't handle requested baud rate"); break;

	speed = tty_get_baud_rate(port->tty);

	speed = keyspan_pda_setbaud(serial, speed);



	if (speed == 0) {

		dbg("can't handle requested baud rate");

		/* It hasn't changed so.. */

		speed = tty_termios_baud_rate(old_termios);

	}

	/* Only speed can change so copy the old h/w parameters

	   then encode the new speed */

	tty_termios_copy_hw(port->tty->termios, old_termios);

	tty_encode_baud_rate(port->tty, speed, speed);

}