1 files changed, 57 insertions, 26 deletions

diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index c72abd524983..5c7d6540053f 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -174,6 +174,7 @@
 
 #define CLK_MULTI_REGISTER         ((__u16)(0x02))
 #define CLK_START_VALUE_REGISTER   ((__u16)(0x03))
+#define GPIO_REGISTER              ((__u16)(0x07))
 
 #define SERIAL_LCR_DLAB            ((__u16)(0x0080))
 
@@ -1103,14 +1104,25 @@ static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
 	mos7840_port->read_urb = port->read_urb;
 
 	/* set up our bulk in urb */
-
-	usb_fill_bulk_urb(mos7840_port->read_urb,
-			  serial->dev,
-			  usb_rcvbulkpipe(serial->dev,
-					  port->bulk_in_endpointAddress),
-			  port->bulk_in_buffer,
-			  mos7840_port->read_urb->transfer_buffer_length,
-			  mos7840_bulk_in_callback, mos7840_port);
+	if ((serial->num_ports == 2)
+		&& ((((__u16)port->number -
+			(__u16)(port->serial->minor)) % 2) != 0)) {
+		usb_fill_bulk_urb(mos7840_port->read_urb,
+			serial->dev,
+			usb_rcvbulkpipe(serial->dev,
+				(port->bulk_in_endpointAddress) + 2),
+			port->bulk_in_buffer,
+			mos7840_port->read_urb->transfer_buffer_length,
+			mos7840_bulk_in_callback, mos7840_port);
+	} else {
+		usb_fill_bulk_urb(mos7840_port->read_urb,
+			serial->dev,
+			usb_rcvbulkpipe(serial->dev,
+				port->bulk_in_endpointAddress),
+			port->bulk_in_buffer,
+			mos7840_port->read_urb->transfer_buffer_length,
+			mos7840_bulk_in_callback, mos7840_port);
+	}
 
 	dbg("mos7840_open: bulkin endpoint is %d",
 	    port->bulk_in_endpointAddress);
@@ -1521,13 +1533,25 @@ static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
 	memcpy(urb->transfer_buffer, current_position, transfer_size);
 
 	/* fill urb with data and submit  */
-	usb_fill_bulk_urb(urb,
-			  serial->dev,
-			  usb_sndbulkpipe(serial->dev,
-					  port->bulk_out_endpointAddress),
-			  urb->transfer_buffer,
-			  transfer_size,
-			  mos7840_bulk_out_data_callback, mos7840_port);
+	if ((serial->num_ports == 2)
+		&& ((((__u16)port->number -
+			(__u16)(port->serial->minor)) % 2) != 0)) {
+		usb_fill_bulk_urb(urb,
+			serial->dev,
+			usb_sndbulkpipe(serial->dev,
+				(port->bulk_out_endpointAddress) + 2),
+			urb->transfer_buffer,
+			transfer_size,
+			mos7840_bulk_out_data_callback, mos7840_port);
+	} else {
+		usb_fill_bulk_urb(urb,
+			serial->dev,
+			usb_sndbulkpipe(serial->dev,
+				port->bulk_out_endpointAddress),
+			urb->transfer_buffer,
+			transfer_size,
+			mos7840_bulk_out_data_callback, mos7840_port);
+	}
 
 	data1 = urb->transfer_buffer;
 	dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress);
@@ -1840,7 +1864,7 @@ static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
 
 	} else {
 #ifdef HW_flow_control
-		/ *setting h/w flow control bit to 0 */
+		/* setting h/w flow control bit to 0 */
 		Data = 0xb;
 		mos7840_port->shadowMCR = Data;
 		status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
@@ -2309,19 +2333,26 @@ static int mos7840_ioctl(struct tty_struct *tty,
 
 static int mos7840_calc_num_ports(struct usb_serial *serial)
 {
-	int mos7840_num_ports = 0;
-
-	dbg("numberofendpoints: cur %d, alt %d",
-	    (int)serial->interface->cur_altsetting->desc.bNumEndpoints,
-	    (int)serial->interface->altsetting->desc.bNumEndpoints);
-	if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
-		mos7840_num_ports = serial->num_ports = 2;
-	} else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
+	__u16 Data = 0x00;
+	int ret = 0;
+	int mos7840_num_ports;
+
+	ret = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+		MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &Data,
+		VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
+
+	if ((Data & 0x01) == 0) {
+		mos7840_num_ports = 2;
+		serial->num_bulk_in = 2;
+		serial->num_bulk_out = 2;
+		serial->num_ports = 2;
+	} else {
+		mos7840_num_ports = 4;
 		serial->num_bulk_in = 4;
 		serial->num_bulk_out = 4;
-		mos7840_num_ports = serial->num_ports = 4;
+		serial->num_ports = 4;
 	}
-	dbg ("mos7840_num_ports = %d", mos7840_num_ports);
+
 	return mos7840_num_ports;
 }