6ca98bc284
Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* USB Wishbone-Serial adapter driver
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*
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* Copyright (C) 2013 Wesley W. Terpstra <w.terpstra@gsi.de>
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* Copyright (C) 2013 GSI Helmholtz Centre for Heavy Ion Research GmbH
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*/
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#include <linux/kernel.h>
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#include <linux/tty.h>
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#include <linux/module.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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#include <linux/uaccess.h>
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#define GSI_VENDOR_OPENCLOSE 0xB0
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static const struct usb_device_id id_table[] = {
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{ USB_DEVICE_AND_INTERFACE_INFO(0x1D50, 0x6062, 0xFF, 0xFF, 0xFF) },
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{ },
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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/*
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* Etherbone must be told that a new stream has begun before data arrives.
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* This is necessary to restart the negotiation of Wishbone bus parameters.
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* Similarly, when the stream ends, Etherbone must be told so that the cycle
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* line can be driven low in the case that userspace failed to do so.
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*/
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static int usb_gsi_openclose(struct usb_serial_port *port, int value)
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{
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struct usb_device *dev = port->serial->dev;
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return usb_control_msg(
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dev,
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usb_sndctrlpipe(dev, 0), /* Send to EP0OUT */
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GSI_VENDOR_OPENCLOSE,
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USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
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value, /* wValue = device is open(1) or closed(0) */
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port->serial->interface->cur_altsetting->desc.bInterfaceNumber,
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NULL, 0, /* There is no data stage */
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5000); /* Timeout till operation fails */
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}
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static int wishbone_serial_open(struct tty_struct *tty,
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struct usb_serial_port *port)
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{
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int retval;
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retval = usb_gsi_openclose(port, 1);
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if (retval) {
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dev_err(&port->serial->dev->dev,
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"Could not mark device as open (%d)\n",
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retval);
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return retval;
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}
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retval = usb_serial_generic_open(tty, port);
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if (retval)
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usb_gsi_openclose(port, 0);
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return retval;
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}
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static void wishbone_serial_close(struct usb_serial_port *port)
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{
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usb_serial_generic_close(port);
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usb_gsi_openclose(port, 0);
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}
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static struct usb_serial_driver wishbone_serial_device = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "wishbone_serial",
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},
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.id_table = id_table,
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.num_ports = 1,
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.open = &wishbone_serial_open,
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.close = &wishbone_serial_close,
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};
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static struct usb_serial_driver * const serial_drivers[] = {
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&wishbone_serial_device, NULL
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};
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module_usb_serial_driver(serial_drivers, id_table);
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MODULE_AUTHOR("Wesley W. Terpstra <w.terpstra@gsi.de>");
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MODULE_DESCRIPTION("USB Wishbone-Serial adapter");
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MODULE_LICENSE("GPL");
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