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USB: opticon: Add Opticon OPN2001 write support

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OPN2001 expects write operations to arrive as a vendor-specific command
through the control pipe (instead of using a separate bulk-out pipe).

Signed-off-by: Alon Ziv <alon-git@nolaviz.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alon Ziv 2010-10-10 08:32:19 +02:00 committed by Greg Kroah-Hartman
parent 97cd8dc4ca
commit 0d930e51cf
1 changed files with 26 additions and 4 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

22
drivers/usb/serial/opticon.c
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@ -187,6 +187,9 @@ static void opticon_write_bulk_callback(struct urb *urb)
/* free up the transfer buffer, as usb_free_urb() does not do this */
kfree(urb->transfer_buffer);
/* setup packet may be set if we're using it for writing */
kfree(urb->setup_packet);
if (status)
dbg("%s - nonzero write bulk status received: %d",
__func__, status);
@ -237,10 +240,29 @@ static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port,
usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
if (port->bulk_out_endpointAddress) {
usb_fill_bulk_urb(urb, serial->dev,
usb_sndbulkpipe(serial->dev,
port->bulk_out_endpointAddress),
buffer, count, opticon_write_bulk_callback, priv);
} else {
struct usb_ctrlrequest *dr;
dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_NOIO);
if (!dr)
return -ENOMEM;
dr->bRequestType = USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT;
dr->bRequest = 0x01;
dr->wValue = 0;
dr->wIndex = 0;
dr->wLength = cpu_to_le16(count);
usb_fill_control_urb(urb, serial->dev,
usb_sndctrlpipe(serial->dev, 0),
(unsigned char *)dr, buffer, count,
opticon_write_bulk_callback, priv);
}
/* send it down the pipe */
status = usb_submit_urb(urb, GFP_ATOMIC);