int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting)
{
const struct usb_cdc_union_desc *union_desc = NULL;
struct cdc_ncm_ctx *ctx;
struct usb_driver *driver;
u8 *buf;
int len;
int temp;
u8 iface_no;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
ctx->tx_timer.function = &cdc_ncm_tx_timer_cb;
ctx->bh.data = (unsigned long)dev;
ctx->bh.func = cdc_ncm_txpath_bh;
atomic_set(&ctx->stop, 0);
spin_lock_init(&ctx->mtx);
/* store ctx pointer in device data field */
dev->data[0] = (unsigned long)ctx;
/* only the control interface can be successfully probed */
ctx->control = intf;
/* get some pointers */
driver = driver_of(intf);
buf = intf->cur_altsetting->extra;
len = intf->cur_altsetting->extralen;
/* parse through descriptors associated with control interface */
while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) {
if (buf[1] != USB_DT_CS_INTERFACE)
goto advance;
switch (buf[2]) {
case USB_CDC_UNION_TYPE:
if (buf[0] < sizeof(*union_desc))
break;
union_desc = (const struct usb_cdc_union_desc *)buf;
/* the master must be the interface we are probing */
if (intf->cur_altsetting->desc.bInterfaceNumber !=
union_desc->bMasterInterface0) {
dev_dbg(&intf->dev, "bogus CDC Union\n");
goto error;
}
ctx->data = usb_ifnum_to_if(dev->udev,
union_desc->bSlaveInterface0);
break;
case USB_CDC_ETHERNET_TYPE:
if (buf[0] < sizeof(*(ctx->ether_desc)))
break;
ctx->ether_desc =
(const struct usb_cdc_ether_desc *)buf;
break;
case USB_CDC_NCM_TYPE:
if (buf[0] < sizeof(*(ctx->func_desc)))
break;
ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf;
break;
case USB_CDC_MBIM_TYPE:
if (buf[0] < sizeof(*(ctx->mbim_desc)))
break;
ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf;
break;
case USB_CDC_MBIM_EXTENDED_TYPE:
if (buf[0] < sizeof(*(ctx->mbim_extended_desc)))
break;
ctx->mbim_extended_desc =
(const struct usb_cdc_mbim_extended_desc *)buf;
break;
default:
break;
}
advance:
/* advance to next descriptor */
temp = buf[0];
buf += temp;
len -= temp;
}
/* some buggy devices have an IAD but no CDC Union */
if (!union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) {
ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1);
dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n");
}
/* check if we got everything */
if (!ctx->data || (!ctx->mbim_desc && !ctx->ether_desc)) {
dev_dbg(&intf->dev, "CDC descriptors missing\n");
goto error;
}
/* claim data interface, if different from control */
if (ctx->data != ctx->control) {
temp = usb_driver_claim_interface(driver, ctx->data, dev);
if (temp) {
dev_dbg(&intf->dev, "failed to claim data intf\n");
goto error;
}
}
iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber;
/* reset data interface */
temp = usb_set_interface(dev->udev, iface_no, 0);
if (temp) {
dev_dbg(&intf->dev, "set interface failed\n");
goto error2;
}
/* configure data interface */
temp = usb_set_interface(dev->udev, iface_no, data_altsetting);
if (temp) {
dev_dbg(&intf->dev, "set interface failed\n");
goto error2;
}
cdc_ncm_find_endpoints(dev, ctx->data);
cdc_ncm_find_endpoints(dev, ctx->control);
if (!dev->in || !dev->out || !dev->status) {
dev_dbg(&intf->dev, "failed to collect endpoints\n");
goto error2;
}
/* initialize data interface */
if (cdc_ncm_setup(dev)) {
dev_dbg(&intf->dev, "cdc_ncm_setup() failed\n");
goto error2;
}
usb_set_intfdata(ctx->data, dev);
usb_set_intfdata(ctx->control, dev);
if (ctx->ether_desc) {
temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress);
if (temp) {
dev_dbg(&intf->dev, "failed to get mac address\n");
goto error2;
}
dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr);
}
/* usbnet use these values for sizing tx/rx queues */
dev->hard_mtu = ctx->tx_max;
dev->rx_urb_size = ctx->rx_max;
return 0;
error2:
usb_set_intfdata(ctx->control, NULL);
usb_set_intfdata(ctx->data, NULL);
if (ctx->data != ctx->control)
usb_driver_release_interface(driver, ctx->data);
error:
cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]);
dev->data[0] = 0;
dev_info(&intf->dev, "bind() failure\n");
return -ENODEV;
}
int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting)
{
struct cdc_ncm_ctx *ctx;
struct usb_driver *driver;
u8 *buf;
int len;
int temp;
u8 iface_no;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
ctx->tx_timer.function = &cdc_ncm_tx_timer_cb;
ctx->bh.data = (unsigned long)ctx;
ctx->bh.func = cdc_ncm_txpath_bh;
atomic_set(&ctx->stop, 0);
spin_lock_init(&ctx->mtx);
ctx->netdev = dev->net;
/* store ctx pointer in device data field */
dev->data[0] = (unsigned long)ctx;
/* get some pointers */
driver = driver_of(intf);
buf = intf->cur_altsetting->extra;
len = intf->cur_altsetting->extralen;
ctx->udev = dev->udev;
ctx->intf = intf;
/* parse through descriptors associated with control interface */
while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) {
if (buf[1] != USB_DT_CS_INTERFACE)
goto advance;
switch (buf[2]) {
case USB_CDC_UNION_TYPE:
if (buf[0] < sizeof(*(ctx->union_desc)))
break;
ctx->union_desc =
(const struct usb_cdc_union_desc *)buf;
ctx->control = usb_ifnum_to_if(dev->udev,
ctx->union_desc->bMasterInterface0);
ctx->data = usb_ifnum_to_if(dev->udev,
ctx->union_desc->bSlaveInterface0);
break;
case USB_CDC_ETHERNET_TYPE:
if (buf[0] < sizeof(*(ctx->ether_desc)))
break;
ctx->ether_desc =
(const struct usb_cdc_ether_desc *)buf;
dev->hard_mtu =
le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
if (dev->hard_mtu < CDC_NCM_MIN_DATAGRAM_SIZE)
dev->hard_mtu = CDC_NCM_MIN_DATAGRAM_SIZE;
else if (dev->hard_mtu > CDC_NCM_MAX_DATAGRAM_SIZE)
dev->hard_mtu = CDC_NCM_MAX_DATAGRAM_SIZE;
break;
case USB_CDC_NCM_TYPE:
if (buf[0] < sizeof(*(ctx->func_desc)))
break;
ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf;
break;
case USB_CDC_MBIM_TYPE:
if (buf[0] < sizeof(*(ctx->mbim_desc)))
break;
ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf;
break;
default:
break;
}
advance:
/* advance to next descriptor */
temp = buf[0];
buf += temp;
len -= temp;
}
/* some buggy devices have an IAD but no CDC Union */
if (!ctx->union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) {
ctx->control = intf;
ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1);
dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n");
}
/* check if we got everything */
if ((ctx->control == NULL) || (ctx->data == NULL) ||
((!ctx->mbim_desc) && ((ctx->ether_desc == NULL) || (ctx->control != intf))))
goto error;
/* claim data interface, if different from control */
if (ctx->data != ctx->control) {
temp = usb_driver_claim_interface(driver, ctx->data, dev);
if (temp)
goto error;
}
iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber;
/* reset data interface */
temp = usb_set_interface(dev->udev, iface_no, 0);
if (temp)
goto error2;
/* initialize data interface */
if (cdc_ncm_setup(ctx))
goto error2;
/* configure data interface */
temp = usb_set_interface(dev->udev, iface_no, data_altsetting);
if (temp)
goto error2;
cdc_ncm_find_endpoints(ctx, ctx->data);
cdc_ncm_find_endpoints(ctx, ctx->control);
if ((ctx->in_ep == NULL) || (ctx->out_ep == NULL) ||
(ctx->status_ep == NULL))
goto error2;
dev->net->ethtool_ops = &cdc_ncm_ethtool_ops;
usb_set_intfdata(ctx->data, dev);
usb_set_intfdata(ctx->control, dev);
usb_set_intfdata(ctx->intf, dev);
if (ctx->ether_desc) {
temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress);
if (temp)
goto error2;
dev_info(&dev->udev->dev, "MAC-Address: %pM\n", dev->net->dev_addr);
}
dev->in = usb_rcvbulkpipe(dev->udev,
ctx->in_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
dev->out = usb_sndbulkpipe(dev->udev,
ctx->out_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
dev->status = ctx->status_ep;
dev->rx_urb_size = ctx->rx_max;
ctx->tx_speed = ctx->rx_speed = 0;
return 0;
error2:
usb_set_intfdata(ctx->control, NULL);
usb_set_intfdata(ctx->data, NULL);
if (ctx->data != ctx->control)
usb_driver_release_interface(driver, ctx->data);
error:
cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]);
dev->data[0] = 0;
dev_info(&dev->udev->dev, "bind() failure\n");
return -ENODEV;
}
int cdc_ncm_bind(struct if_usb_devdata *pipe_data,
struct usb_interface *intf, struct usb_link_device *usb_ld)
{
struct cdc_ncm_ctx *ctx;
struct usb_driver *usbdrv = to_usb_driver(intf->dev.driver);
struct usb_device *usbdev = interface_to_usbdev(intf);
unsigned char *buf = intf->cur_altsetting->extra;
int buflen = intf->cur_altsetting->extralen;
const struct usb_cdc_union_desc *union_desc;
int temp;
u8 iface_no;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (ctx == NULL)
return -ENODEV;
hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
ctx->tx_timer.function = &cdc_ncm_tx_timer_cb;
ctx->bh.data = (unsigned long)pipe_data;
ctx->bh.func = cdc_ncm_txpath_bh;
atomic_set(&ctx->stop, 0);
spin_lock_init(&ctx->mtx);
/* store ctx pointer in device data field */
pipe_data->sedata = (void *)ctx;
ctx->intf = intf;
/* parse through descriptors associated with control interface */
while ((buflen > 0) && (buf[0] > 2) && (buf[0] <= buflen)) {
if (buf[1] == USB_DT_CS_INTERFACE) {
switch (buf[2]) {
case USB_CDC_UNION_TYPE:
if (buf[0] < sizeof(*union_desc))
break;
union_desc =
(const struct usb_cdc_union_desc *)buf;
ctx->control = usb_ifnum_to_if(usbdev,
union_desc->bMasterInterface0);
ctx->data = usb_ifnum_to_if(usbdev,
union_desc->bSlaveInterface0);
break;
case USB_CDC_ETHERNET_TYPE:
if (buf[0] < sizeof(*(ctx->ether_desc)))
break;
ctx->ether_desc =
(const struct usb_cdc_ether_desc *)buf;
break;
case USB_CDC_NCM_TYPE:
if (buf[0] < sizeof(*(ctx->func_desc)))
break;
ctx->func_desc =
(const struct usb_cdc_ncm_desc *)buf;
break;
default:
break;
}
}
temp = buf[0];
buf += temp;
buflen -= temp;
}
/* check if we got everything */
if ((ctx->control == NULL) || (ctx->data == NULL) ||
(ctx->ether_desc == NULL) || (ctx->control != intf))
goto error;
pipe_data->usbdev = usb_get_dev(usbdev);
pipe_data->usb_ld = usb_ld;
pipe_data->disconnected = 0;
pipe_data->state = STATE_RESUMED;
/* claim interfaces, if any */
temp = usb_driver_claim_interface(usbdrv, ctx->data, pipe_data);
if (temp)
goto error;
iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber;
/* reset data interface */
temp = usb_set_interface(usbdev, iface_no, 0);
if (temp)
goto error2;
/* initialize data interface */
if (cdc_ncm_setup(pipe_data))
goto error2;
/* configure data interface */
temp = usb_set_interface(usbdev, iface_no, 1);
if (temp)
goto error2;
cdc_ncm_find_endpoints(ctx, ctx->data);
cdc_ncm_find_endpoints(ctx, ctx->control);
if ((ctx->in_ep == NULL) || (ctx->out_ep == NULL) ||
(ctx->status_ep == NULL))
goto error2;
usb_set_intfdata(ctx->data, pipe_data);
usb_set_intfdata(ctx->control, pipe_data);
usb_set_intfdata(ctx->intf, pipe_data);
pipe_data->rx_pipe = usb_rcvbulkpipe(usbdev,
ctx->in_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
pipe_data->tx_pipe = usb_sndbulkpipe(usbdev,
ctx->out_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
pipe_data->status = ctx->status_ep;
pipe_data->rx_buf_size = ctx->rx_max;
mif_debug("EP status: %x, tx:%x, rx:%x\n",
ctx->status_ep->desc.bEndpointAddress,
ctx->in_ep->desc.bEndpointAddress,
ctx->out_ep->desc.bEndpointAddress);
temp = cdc_ncm_setup_ethernet_address(pipe_data);
if (temp)
goto error2;
/*
* We should get an event when network connection is "connected" or
* "disconnected". Set network connection in "disconnected" state
* (carrier is OFF) during attach, so the IP network stack does not
* start IPv6 negotiation and more.
*/
netif_carrier_off(pipe_data->iod->ndev);
ctx->tx_speed = ctx->rx_speed = 0;
if (pipe_data->iod->ndev->mtu != (ctx->max_datagram_size - ETH_HLEN))
pipe_data->iod->ndev->mtu = ctx->max_datagram_size - ETH_HLEN;
return 0;
error2:
usb_set_intfdata(ctx->control, NULL);
usb_set_intfdata(ctx->data, NULL);
usb_driver_release_interface(usbdrv, ctx->data);
error:
cdc_ncm_free((struct cdc_ncm_ctx *)pipe_data->sedata);
pipe_data->sedata = NULL;
mif_err("bind() failure\n");
return -ENODEV;
}