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Commit 1b8fb414 authored by Mark Ellis's avatar Mark Ellis Committed by Greg Kroah-Hartman
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USB: ipaq: handle 4 endpoint devices 



The ipaq driver currently enforces one port on all devices. This
is correct for 2 and 3 endpoint devices, but with 4 endpoint devices
meaningful communication occurs on the second pair.

This patch allows 2 ports for 4 endpoint devices.

Signed-off-by: default avatarMark Ellis <mark@mpellis.org.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 49121aa1

drivers/usb/serial/ipaq.c

+37 −6
Original line number Diff line number Diff line
@@ -78,6 +78,7 @@ static int ipaq_open(struct tty_struct *tty, 
			struct usb_serial_port *port, struct file *filp);

static void ipaq_close(struct tty_struct *tty,

			struct usb_serial_port *port, struct file *filp);

static int  ipaq_calc_num_ports(struct usb_serial *serial);

static int  ipaq_startup(struct usb_serial *serial);

static void ipaq_shutdown(struct usb_serial *serial);

static int ipaq_write(struct tty_struct *tty, struct usb_serial_port *port,
@@ -572,15 +573,10 @@ static struct usb_serial_driver ipaq_device = { 
	.description =		"PocketPC PDA",

	.usb_driver = 		&ipaq_driver,

	.id_table =		ipaq_id_table,

	/*

	 * some devices have an extra endpoint, which

	 * must be ignored as it would make the core

	 * create a second port which oopses when used

	 */

	.num_ports =		1,

	.open =			ipaq_open,

	.close =		ipaq_close,

	.attach =		ipaq_startup,

	.calc_num_ports =	ipaq_calc_num_ports,

	.shutdown =		ipaq_shutdown,

	.write =		ipaq_write,

	.write_room =		ipaq_write_room,
@@ -956,14 +952,49 @@ static void ipaq_destroy_lists(struct usb_serial_port *port) 
}





static int ipaq_calc_num_ports(struct usb_serial *serial)

{

	/*

	 * some devices have 3 endpoints, the 3rd of which

	 * must be ignored as it would make the core

	 * create a second port which oopses when used

	 */

	int ipaq_num_ports = 1;



	dbg("%s - numberofendpoints: %d", __FUNCTION__,

		(int)serial->interface->cur_altsetting->desc.bNumEndpoints);



	/*

	 * a few devices have 4 endpoints, seemingly Yakuma devices,

	 * and we need the second pair, so let them have 2 ports

	 *

	 * TODO: can we drop port 1 ?

	 */

	if (serial->interface->cur_altsetting->desc.bNumEndpoints > 3) {

		ipaq_num_ports = 2;

	}



	return ipaq_num_ports;

}





static int ipaq_startup(struct usb_serial *serial)

{

	dbg("%s", __func__);

	if (serial->dev->actconfig->desc.bConfigurationValue != 1) {

		/*

		 * FIXME: HP iPaq rx3715, possibly others, have 1 config that

		 * is labeled as 2

		 */



		dev_err(&serial->dev->dev, "active config #%d != 1 ??\n",

			serial->dev->actconfig->desc.bConfigurationValue);

		return -ENODEV;

	}



	dbg("%s - iPAQ module configured for %d ports",

		__FUNCTION__, serial->num_ports);



	return usb_reset_configuration(serial->dev);

}