mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 05:16:53 +07:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
135 lines
2.9 KiB
C
135 lines
2.9 KiB
C
/*
|
|
* USB Serial Converter Bus specific functions
|
|
*
|
|
* Copyright (C) 2002 Greg Kroah-Hartman (greg@kroah.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License version
|
|
* 2 as published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/module.h>
|
|
#include <linux/usb.h>
|
|
#include "usb-serial.h"
|
|
|
|
static int usb_serial_device_match (struct device *dev, struct device_driver *drv)
|
|
{
|
|
struct usb_serial_device_type *driver;
|
|
const struct usb_serial_port *port;
|
|
|
|
/*
|
|
* drivers are already assigned to ports in serial_probe so it's
|
|
* a simple check here.
|
|
*/
|
|
port = to_usb_serial_port(dev);
|
|
if (!port)
|
|
return 0;
|
|
|
|
driver = to_usb_serial_driver(drv);
|
|
|
|
if (driver == port->serial->type)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct bus_type usb_serial_bus_type = {
|
|
.name = "usb-serial",
|
|
.match = usb_serial_device_match,
|
|
};
|
|
|
|
static int usb_serial_device_probe (struct device *dev)
|
|
{
|
|
struct usb_serial_device_type *driver;
|
|
struct usb_serial_port *port;
|
|
int retval = 0;
|
|
int minor;
|
|
|
|
port = to_usb_serial_port(dev);
|
|
if (!port) {
|
|
retval = -ENODEV;
|
|
goto exit;
|
|
}
|
|
|
|
driver = port->serial->type;
|
|
if (driver->port_probe) {
|
|
if (!try_module_get(driver->owner)) {
|
|
dev_err(dev, "module get failed, exiting\n");
|
|
retval = -EIO;
|
|
goto exit;
|
|
}
|
|
retval = driver->port_probe (port);
|
|
module_put(driver->owner);
|
|
if (retval)
|
|
goto exit;
|
|
}
|
|
|
|
minor = port->number;
|
|
tty_register_device (usb_serial_tty_driver, minor, dev);
|
|
dev_info(&port->serial->dev->dev,
|
|
"%s converter now attached to ttyUSB%d\n",
|
|
driver->name, minor);
|
|
|
|
exit:
|
|
return retval;
|
|
}
|
|
|
|
static int usb_serial_device_remove (struct device *dev)
|
|
{
|
|
struct usb_serial_device_type *driver;
|
|
struct usb_serial_port *port;
|
|
int retval = 0;
|
|
int minor;
|
|
|
|
port = to_usb_serial_port(dev);
|
|
if (!port) {
|
|
return -ENODEV;
|
|
}
|
|
|
|
driver = port->serial->type;
|
|
if (driver->port_remove) {
|
|
if (!try_module_get(driver->owner)) {
|
|
dev_err(dev, "module get failed, exiting\n");
|
|
retval = -EIO;
|
|
goto exit;
|
|
}
|
|
retval = driver->port_remove (port);
|
|
module_put(driver->owner);
|
|
}
|
|
exit:
|
|
minor = port->number;
|
|
tty_unregister_device (usb_serial_tty_driver, minor);
|
|
dev_info(dev, "%s converter now disconnected from ttyUSB%d\n",
|
|
driver->name, minor);
|
|
|
|
return retval;
|
|
}
|
|
|
|
int usb_serial_bus_register(struct usb_serial_device_type *device)
|
|
{
|
|
int retval;
|
|
|
|
if (device->short_name)
|
|
device->driver.name = (char *)device->short_name;
|
|
else
|
|
device->driver.name = (char *)device->name;
|
|
device->driver.bus = &usb_serial_bus_type;
|
|
device->driver.probe = usb_serial_device_probe;
|
|
device->driver.remove = usb_serial_device_remove;
|
|
device->driver.owner = device->owner;
|
|
|
|
retval = driver_register(&device->driver);
|
|
|
|
return retval;
|
|
}
|
|
|
|
void usb_serial_bus_deregister(struct usb_serial_device_type *device)
|
|
{
|
|
driver_unregister (&device->driver);
|
|
}
|
|
|