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Commit d760557d authored by Johan Hovold's avatar Johan Hovold
Browse files

USB: serial: mos7720: clean up mcs7715 port setup 



Clean up the mcs7715 port setup by using the new endpoint-remap
functionality provided by core. Instead of poking around in internal
port-structure fields, simply swap the endpoint descriptors of the two
ports in calc_num_ports before the port structures are even allocated.

Note that we still need to override the default interrupt completion
handler.

Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
parent 772b2c5d

drivers/usb/serial/mos7720.c

+20 −32
Original line number Diff line number Diff line
@@ -977,8 +977,20 @@ static int mos77xx_calc_num_ports(struct usb_serial *serial, 
					struct usb_serial_endpoints *epds)

{

	u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);

	if (product == MOSCHIP_DEVICE_ID_7715)



	if (product == MOSCHIP_DEVICE_ID_7715) {

		/*

		 * The 7715 uses the first bulk in/out endpoint pair for the

		 * parallel port, and the second for the serial port. We swap

		 * the endpoint descriptors here so that the the first and

		 * only registered port structure uses the serial-port

		 * endpoints.

		 */

		swap(epds->bulk_in[0], epds->bulk_in[1]);

		swap(epds->bulk_out[0], epds->bulk_out[1]);



		return 1;

	}



	return 2;

}
@@ -1904,46 +1916,22 @@ static int mos7720_startup(struct usb_serial *serial) 
	product = le16_to_cpu(serial->dev->descriptor.idProduct);

	dev = serial->dev;



	/*

	 * The 7715 uses the first bulk in/out endpoint pair for the parallel

	 * port, and the second for the serial port.  Because the usbserial core

	 * assumes both pairs are serial ports, we must engage in a bit of

	 * subterfuge and swap the pointers for ports 0 and 1 in order to make

	 * port 0 point to the serial port.  However, both moschip devices use a

	 * single interrupt-in endpoint for both ports (as mentioned a little

	 * further down), and this endpoint was assigned to port 0.  So after

	 * the swap, we must copy the interrupt endpoint elements from port 1

	 * (as newly assigned) to port 0, and null out port 1 pointers.

	 */

	/* setting configuration feature to one */

	usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),

			(__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5000);



	if (product == MOSCHIP_DEVICE_ID_7715) {

		struct usb_serial_port *tmp = serial->port[0];

		serial->port[0] = serial->port[1];

		serial->port[1] = tmp;

		serial->port[0]->interrupt_in_urb = tmp->interrupt_in_urb;

		serial->port[0]->interrupt_in_buffer = tmp->interrupt_in_buffer;

		serial->port[0]->interrupt_in_endpointAddress =

			tmp->interrupt_in_endpointAddress;

		serial->port[1]->interrupt_in_urb = NULL;

		serial->port[1]->interrupt_in_buffer = NULL;



		if (serial->port[0]->interrupt_in_urb) {

		struct urb *urb = serial->port[0]->interrupt_in_urb;



		if (urb)

			urb->complete = mos7715_interrupt_callback;

		}

	}



	/* setting configuration feature to one */

	usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),

			(__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5000);



#ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT

	if (product == MOSCHIP_DEVICE_ID_7715) {

		ret_val = mos7715_parport_init(serial);

		if (ret_val < 0)

			return ret_val;

	}

#endif

	}

	/* start the interrupt urb */

	ret_val = usb_submit_urb(serial->port[0]->interrupt_in_urb, GFP_KERNEL);

	if (ret_val) {