linux/drivers/usb/atm/xusbatm.c
Greg Kroah-Hartman 4a8635ae08 USB: atm: Remove redundant license text
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.

Cc: Duncan Sands <duncan.sands@free.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-04 11:55:38 +01:00

217 lines
6.9 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/******************************************************************************
* xusbatm.c - dumb usbatm-based driver for modems initialized in userspace
*
* Copyright (C) 2005 Duncan Sands, Roman Kagan (rkagan % mail ! ru)
******************************************************************************/
#include <linux/module.h>
#include <linux/etherdevice.h> /* for eth_random_addr() */
#include "usbatm.h"
#define XUSBATM_DRIVERS_MAX 8
#define XUSBATM_PARM(name, type, parmtype, desc) \
static type name[XUSBATM_DRIVERS_MAX]; \
static unsigned int num_##name; \
module_param_array(name, parmtype, &num_##name, 0444); \
MODULE_PARM_DESC(name, desc)
XUSBATM_PARM(vendor, unsigned short, ushort, "USB device vendor");
XUSBATM_PARM(product, unsigned short, ushort, "USB device product");
XUSBATM_PARM(rx_endpoint, unsigned char, byte, "rx endpoint number");
XUSBATM_PARM(tx_endpoint, unsigned char, byte, "tx endpoint number");
XUSBATM_PARM(rx_padding, unsigned char, byte, "rx padding (default 0)");
XUSBATM_PARM(tx_padding, unsigned char, byte, "tx padding (default 0)");
XUSBATM_PARM(rx_altsetting, unsigned char, byte, "rx altsetting (default 0)");
XUSBATM_PARM(tx_altsetting, unsigned char, byte, "rx altsetting (default 0)");
static const char xusbatm_driver_name[] = "xusbatm";
static struct usbatm_driver xusbatm_drivers[XUSBATM_DRIVERS_MAX];
static struct usb_device_id xusbatm_usb_ids[XUSBATM_DRIVERS_MAX + 1];
static struct usb_driver xusbatm_usb_driver;
static struct usb_interface *xusbatm_find_intf(struct usb_device *usb_dev, int altsetting, u8 ep)
{
struct usb_host_interface *alt;
struct usb_interface *intf;
int i, j;
for (i = 0; i < usb_dev->actconfig->desc.bNumInterfaces; i++)
if ((intf = usb_dev->actconfig->interface[i]) && (alt = usb_altnum_to_altsetting(intf, altsetting)))
for (j = 0; j < alt->desc.bNumEndpoints; j++)
if (alt->endpoint[j].desc.bEndpointAddress == ep)
return intf;
return NULL;
}
static int xusbatm_capture_intf(struct usbatm_data *usbatm, struct usb_device *usb_dev,
struct usb_interface *intf, int altsetting, int claim)
{
int ifnum = intf->altsetting->desc.bInterfaceNumber;
int ret;
if (claim && (ret = usb_driver_claim_interface(&xusbatm_usb_driver, intf, usbatm))) {
usb_err(usbatm, "%s: failed to claim interface %2d (%d)!\n", __func__, ifnum, ret);
return ret;
}
ret = usb_set_interface(usb_dev, ifnum, altsetting);
if (ret) {
usb_err(usbatm, "%s: altsetting %2d for interface %2d failed (%d)!\n", __func__, altsetting, ifnum, ret);
return ret;
}
return 0;
}
static void xusbatm_release_intf(struct usb_device *usb_dev, struct usb_interface *intf, int claimed)
{
if (claimed) {
usb_set_intfdata(intf, NULL);
usb_driver_release_interface(&xusbatm_usb_driver, intf);
}
}
static int xusbatm_bind(struct usbatm_data *usbatm,
struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *usb_dev = interface_to_usbdev(intf);
int drv_ix = id - xusbatm_usb_ids;
int rx_alt = rx_altsetting[drv_ix];
int tx_alt = tx_altsetting[drv_ix];
struct usb_interface *rx_intf = xusbatm_find_intf(usb_dev, rx_alt, rx_endpoint[drv_ix]);
struct usb_interface *tx_intf = xusbatm_find_intf(usb_dev, tx_alt, tx_endpoint[drv_ix]);
int ret;
usb_dbg(usbatm, "%s: binding driver %d: vendor %04x product %04x"
" rx: ep %02x padd %d alt %2d tx: ep %02x padd %d alt %2d\n",
__func__, drv_ix, vendor[drv_ix], product[drv_ix],
rx_endpoint[drv_ix], rx_padding[drv_ix], rx_alt,
tx_endpoint[drv_ix], tx_padding[drv_ix], tx_alt);
if (!rx_intf || !tx_intf) {
if (!rx_intf)
usb_dbg(usbatm, "%s: no interface contains endpoint %02x in altsetting %2d\n",
__func__, rx_endpoint[drv_ix], rx_alt);
if (!tx_intf)
usb_dbg(usbatm, "%s: no interface contains endpoint %02x in altsetting %2d\n",
__func__, tx_endpoint[drv_ix], tx_alt);
return -ENODEV;
}
if ((rx_intf != intf) && (tx_intf != intf))
return -ENODEV;
if ((rx_intf == tx_intf) && (rx_alt != tx_alt)) {
usb_err(usbatm, "%s: altsettings clash on interface %2d (%2d vs %2d)!\n", __func__,
rx_intf->altsetting->desc.bInterfaceNumber, rx_alt, tx_alt);
return -EINVAL;
}
usb_dbg(usbatm, "%s: rx If#=%2d; tx If#=%2d\n", __func__,
rx_intf->altsetting->desc.bInterfaceNumber,
tx_intf->altsetting->desc.bInterfaceNumber);
ret = xusbatm_capture_intf(usbatm, usb_dev, rx_intf, rx_alt, rx_intf != intf);
if (ret)
return ret;
if ((tx_intf != rx_intf) && (ret = xusbatm_capture_intf(usbatm, usb_dev, tx_intf, tx_alt, tx_intf != intf))) {
xusbatm_release_intf(usb_dev, rx_intf, rx_intf != intf);
return ret;
}
return 0;
}
static void xusbatm_unbind(struct usbatm_data *usbatm,
struct usb_interface *intf)
{
struct usb_device *usb_dev = interface_to_usbdev(intf);
int i;
usb_dbg(usbatm, "%s entered\n", __func__);
for (i = 0; i < usb_dev->actconfig->desc.bNumInterfaces; i++) {
struct usb_interface *cur_intf = usb_dev->actconfig->interface[i];
if (cur_intf && (usb_get_intfdata(cur_intf) == usbatm)) {
usb_set_intfdata(cur_intf, NULL);
usb_driver_release_interface(&xusbatm_usb_driver, cur_intf);
}
}
}
static int xusbatm_atm_start(struct usbatm_data *usbatm,
struct atm_dev *atm_dev)
{
atm_dbg(usbatm, "%s entered\n", __func__);
/* use random MAC as we've no way to get it from the device */
eth_random_addr(atm_dev->esi);
return 0;
}
static int xusbatm_usb_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
return usbatm_usb_probe(intf, id,
xusbatm_drivers + (id - xusbatm_usb_ids));
}
static struct usb_driver xusbatm_usb_driver = {
.name = xusbatm_driver_name,
.probe = xusbatm_usb_probe,
.disconnect = usbatm_usb_disconnect,
.id_table = xusbatm_usb_ids
};
static int __init xusbatm_init(void)
{
int i;
if (!num_vendor ||
num_vendor != num_product ||
num_vendor != num_rx_endpoint ||
num_vendor != num_tx_endpoint) {
printk(KERN_WARNING "xusbatm: malformed module parameters\n");
return -EINVAL;
}
for (i = 0; i < num_vendor; i++) {
rx_endpoint[i] |= USB_DIR_IN;
tx_endpoint[i] &= USB_ENDPOINT_NUMBER_MASK;
xusbatm_usb_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
xusbatm_usb_ids[i].idVendor = vendor[i];
xusbatm_usb_ids[i].idProduct = product[i];
xusbatm_drivers[i].driver_name = xusbatm_driver_name;
xusbatm_drivers[i].bind = xusbatm_bind;
xusbatm_drivers[i].unbind = xusbatm_unbind;
xusbatm_drivers[i].atm_start = xusbatm_atm_start;
xusbatm_drivers[i].bulk_in = rx_endpoint[i];
xusbatm_drivers[i].bulk_out = tx_endpoint[i];
xusbatm_drivers[i].rx_padding = rx_padding[i];
xusbatm_drivers[i].tx_padding = tx_padding[i];
}
return usb_register(&xusbatm_usb_driver);
}
module_init(xusbatm_init);
static void __exit xusbatm_exit(void)
{
usb_deregister(&xusbatm_usb_driver);
}
module_exit(xusbatm_exit);
MODULE_AUTHOR("Roman Kagan, Duncan Sands");
MODULE_DESCRIPTION("Driver for USB ADSL modems initialized in userspace");
MODULE_LICENSE("GPL");