mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
216 lines
6.9 KiB
216 lines
6.9 KiB
// 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) { |
|
pr_warn("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");
|
|
|