/*
 * USB Wishbone-Serial adapter driver
 *
 * Copyright (C) 2013 Wesley W. Terpstra <w.terpstra@gsi.de>
 * Copyright (C) 2013 GSI Helmholtz Centre for Heavy Ion Research GmbH
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 */

#include <linux/kernel.h>
#include <linux/tty.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include <linux/uaccess.h>

#define GSI_VENDOR_OPENCLOSE 0xB0

static const struct usb_device_id id_table[] = {
	{ USB_DEVICE_AND_INTERFACE_INFO(0x1D50, 0x6062, 0xFF, 0xFF, 0xFF) },
	{ },
};
MODULE_DEVICE_TABLE(usb, id_table);

/*
 * Etherbone must be told that a new stream has begun before data arrives.
 * This is necessary to restart the negotiation of Wishbone bus parameters.
 * Similarly, when the stream ends, Etherbone must be told so that the cycle
 * line can be driven low in the case that userspace failed to do so.
 */
static int usb_gsi_openclose(struct usb_serial_port *port, int value)
{
	struct usb_device *dev = port->serial->dev;

	return usb_control_msg(
		dev,
		usb_sndctrlpipe(dev, 0), /* Send to EP0OUT */
		GSI_VENDOR_OPENCLOSE,
		USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
		value, /* wValue = device is open(1) or closed(0) */
		port->serial->interface->cur_altsetting->desc.bInterfaceNumber,
		NULL, 0,  /* There is no data stage */
		5000); /* Timeout till operation fails */
}

static int wishbone_serial_open(struct tty_struct *tty,
				struct usb_serial_port *port)
{
	int retval;

	retval = usb_gsi_openclose(port, 1);
	if (retval) {
		dev_err(&port->serial->dev->dev,
		       "Could not mark device as open (%d)\n",
		       retval);
		return retval;
	}

	retval = usb_serial_generic_open(tty, port);
	if (retval)
		usb_gsi_openclose(port, 0);

	return retval;
}

static void wishbone_serial_close(struct usb_serial_port *port)
{
	usb_serial_generic_close(port);
	usb_gsi_openclose(port, 0);
}

static struct usb_serial_driver wishbone_serial_device = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"wishbone_serial",
	},
	.id_table =		id_table,
	.num_ports =		1,
	.open =			&wishbone_serial_open,
	.close =		&wishbone_serial_close,
};

static struct usb_serial_driver * const serial_drivers[] = {
	&wishbone_serial_device, NULL
};

module_usb_serial_driver(serial_drivers, id_table);

MODULE_AUTHOR("Wesley W. Terpstra <w.terpstra@gsi.de>");
MODULE_DESCRIPTION("USB Wishbone-Serial adapter");
MODULE_LICENSE("GPL");
t>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=868b2072f09c8a698df8066ca72d30411dcc57d6'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?h=nds-private-remove&amp;id=868b2072f09c8a698df8066ca72d30411dcc57d6'>include</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='868b2072f09c8a698df8066ca72d30411dcc57d6'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Moritz Fischer &lt;moritz.fischer@ettus.com&gt;</td><td class='right'>2016-05-23 11:44:39 -0700</td></tr>
<tr><th>committer</th><td>Wolfram Sang &lt;wsa@the-dreams.de&gt;</td><td class='right'>2016-05-26 20:52:15 +0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include?h=nds-private-remove&amp;id=868b2072f09c8a698df8066ca72d30411dcc57d6'>868b2072f09c8a698df8066ca72d30411dcc57d6</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include?id=868b2072f09c8a698df8066ca72d30411dcc57d6'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=868b2072f09c8a698df8066ca72d30411dcc57d6'>a9148b38dadb79d21ed8e75613282bad12475aa8</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include?h=nds-private-remove&amp;id=868b2072f09c8a698df8066ca72d30411dcc57d6'>include</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include?h=nds-private-remove&amp;id=79439d8308bb12b4bdb2ca42fba2b71f1600b88b'>79439d8308bb12b4bdb2ca42fba2b71f1600b88b</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include?h=nds-private-remove&amp;id=868b2072f09c8a698df8066ca72d30411dcc57d6&amp;id2=79439d8308bb12b4bdb2ca42fba2b71f1600b88b'>diff</a>)</td></tr></table>
<div class='commit-subject'>misc: at24: Fix typo in at24 header file</div><div class='commit-msg'>This commit fixes a simple typo s/mvmem/nvmem in the
example.

Signed-off-by: Moritz Fischer &lt;moritz.fischer@ettus.com&gt;
Signed-off-by: Wolfram Sang &lt;wsa@the-dreams.de&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=868b2072f09c8a698df8066ca72d30411dcc57d6'>Diffstat</a> (limited to 'include')</div><table summary='diffstat' class='diffstat'>