Lines Matching +full:cdc +full:- +full:acm
1 // SPDX-License-Identifier: GPL-2.0-or-later
14 #include <linux/usb/cdc.h>
20 * RNDIS is NDIS remoted over USB. It's a MSFT variant of CDC ACM ... of
21 * course ACM was intended for modems, not Ethernet links! USB's standard
22 * for Ethernet links is "CDC Ethernet", which is significantly simpler.
26 * - Power management in particular relies on information that's scattered
29 * - There are various undocumented protocol requirements, such as the
30 * need to send unused garbage in control-OUT messages.
31 * - In some cases, MS-Windows will emit undocumented requests; this
34 * Moreover there's a no-open-specs variant of RNDIS called "ActiveSync".
37 * favor of such non-proprietary alternatives as CDC Ethernet or the newer (and
47 netdev_dbg(dev->net, "rndis status urb, len %d stat %d\n", in rndis_status()
48 urb->actual_length, urb->status); in rndis_status()
60 struct cdc_state *info = (void *)&dev->data; in rndis_msg_indicate()
61 struct device *udev = &info->control->dev; in rndis_msg_indicate()
63 if (dev->driver_info->indication) { in rndis_msg_indicate()
64 dev->driver_info->indication(dev, msg, buflen); in rndis_msg_indicate()
66 u32 status = le32_to_cpu(msg->status); in rndis_msg_indicate()
82 * RPC done RNDIS-style. Caller guarantees:
83 * - message is properly byteswapped
84 * - there's no other request pending
85 * - buf can hold up to 1KB response (required by RNDIS spec)
93 struct cdc_state *info = (void *) &dev->data; in rndis_command()
106 msg_type = le32_to_cpu(buf->msg_type); in rndis_command()
110 xid = dev->xid++; in rndis_command()
112 xid = dev->xid++; in rndis_command()
113 buf->request_id = (__force __le32) xid; in rndis_command()
115 master_ifnum = info->control->cur_altsetting->desc.bInterfaceNumber; in rndis_command()
116 retval = usb_control_msg(dev->udev, in rndis_command()
117 usb_sndctrlpipe(dev->udev, 0), in rndis_command()
121 buf, le32_to_cpu(buf->msg_len), in rndis_command()
128 if (dev->driver_info->data & RNDIS_DRIVER_DATA_POLL_STATUS) { in rndis_command()
130 dev->udev, in rndis_command()
131 usb_rcvintpipe(dev->udev, in rndis_command()
132 dev->status->desc.bEndpointAddress), in rndis_command()
140 rsp = le32_to_cpu(buf->msg_type) | RNDIS_MSG_COMPLETION; in rndis_command()
143 retval = usb_control_msg(dev->udev, in rndis_command()
144 usb_rcvctrlpipe(dev->udev, 0), in rndis_command()
151 msg_type = le32_to_cpu(buf->msg_type); in rndis_command()
152 msg_len = le32_to_cpu(buf->msg_len); in rndis_command()
153 status = le32_to_cpu(buf->status); in rndis_command()
154 request_id = (__force u32) buf->request_id; in rndis_command()
162 dev_dbg(&info->control->dev, in rndis_command()
165 return -EL3RST; in rndis_command()
167 dev_dbg(&info->control->dev, in rndis_command()
178 msg->msg_type = cpu_to_le32(RNDIS_MSG_KEEPALIVE_C); in rndis_command()
179 msg->msg_len = cpu_to_le32(sizeof *msg); in rndis_command()
180 msg->status = cpu_to_le32(RNDIS_STATUS_SUCCESS); in rndis_command()
181 retval = usb_control_msg(dev->udev, in rndis_command()
182 usb_sndctrlpipe(dev->udev, 0), in rndis_command()
189 dev_dbg(&info->control->dev, in rndis_command()
195 dev_dbg(&info->control->dev, in rndis_command()
197 le32_to_cpu(buf->msg_type), msg_len); in rndis_command()
201 dev_dbg(&info->control->dev, in rndis_command()
206 dev_dbg(&info->control->dev, "rndis response timeout\n"); in rndis_command()
207 return -ETIMEDOUT; in rndis_command()
215 * specified by @in_len. If @reply_len is not set to -1 then the reply
243 u.get->msg_type = cpu_to_le32(RNDIS_MSG_QUERY); in rndis_query()
244 u.get->msg_len = cpu_to_le32(sizeof *u.get + in_len); in rndis_query()
245 u.get->oid = cpu_to_le32(oid); in rndis_query()
246 u.get->len = cpu_to_le32(in_len); in rndis_query()
247 u.get->offset = cpu_to_le32(20); in rndis_query()
251 dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) failed, %d\n", in rndis_query()
256 off = le32_to_cpu(u.get_c->offset); in rndis_query()
257 len = le32_to_cpu(u.get_c->len); in rndis_query()
258 if (unlikely((off > CONTROL_BUFFER_SIZE - 8) || in rndis_query()
259 (len > CONTROL_BUFFER_SIZE - 8 - off))) in rndis_query()
262 if (*reply_len != -1 && len != *reply_len) in rndis_query()
265 *reply = (unsigned char *) &u.get_c->request_id + off; in rndis_query()
271 dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) " in rndis_query()
272 "invalid response - off %d len %d\n", in rndis_query()
274 return -EDOM; in rndis_query()
292 struct net_device *net = dev->net; in generic_rndis_bind()
293 struct cdc_state *info = (void *) &dev->data; in generic_rndis_bind()
313 return -ENOMEM; in generic_rndis_bind()
318 u.init->msg_type = cpu_to_le32(RNDIS_MSG_INIT); in generic_rndis_bind()
319 u.init->msg_len = cpu_to_le32(sizeof *u.init); in generic_rndis_bind()
320 u.init->major_version = cpu_to_le32(1); in generic_rndis_bind()
321 u.init->minor_version = cpu_to_le32(0); in generic_rndis_bind()
325 * For RX we handle drivers that zero-pad to end-of-packet. in generic_rndis_bind()
334 net->hard_header_len += sizeof (struct rndis_data_hdr); in generic_rndis_bind()
335 dev->hard_mtu = net->mtu + net->hard_header_len; in generic_rndis_bind()
337 dev->maxpacket = usb_maxpacket(dev->udev, dev->out); in generic_rndis_bind()
338 if (dev->maxpacket == 0) { in generic_rndis_bind()
339 netif_dbg(dev, probe, dev->net, in generic_rndis_bind()
340 "dev->maxpacket can't be 0\n"); in generic_rndis_bind()
341 retval = -EINVAL; in generic_rndis_bind()
345 dev->rx_urb_size = dev->hard_mtu + (dev->maxpacket + 1); in generic_rndis_bind()
346 dev->rx_urb_size &= ~(dev->maxpacket - 1); in generic_rndis_bind()
347 u.init->max_transfer_size = cpu_to_le32(dev->rx_urb_size); in generic_rndis_bind()
349 net->netdev_ops = &rndis_netdev_ops; in generic_rndis_bind()
354 dev_err(&intf->dev, "RNDIS init failed, %d\n", retval); in generic_rndis_bind()
357 tmp = le32_to_cpu(u.init_c->max_transfer_size); in generic_rndis_bind()
358 if (tmp < dev->hard_mtu) { in generic_rndis_bind()
359 if (tmp <= net->hard_header_len) { in generic_rndis_bind()
360 dev_err(&intf->dev, in generic_rndis_bind()
362 dev->hard_mtu, tmp); in generic_rndis_bind()
363 retval = -EINVAL; in generic_rndis_bind()
366 dev_warn(&intf->dev, in generic_rndis_bind()
369 dev->hard_mtu, tmp, tmp - net->hard_header_len); in generic_rndis_bind()
370 dev->hard_mtu = tmp; in generic_rndis_bind()
371 net->mtu = dev->hard_mtu - net->hard_header_len; in generic_rndis_bind()
375 dev_dbg(&intf->dev, in generic_rndis_bind()
377 dev->hard_mtu, tmp, dev->rx_urb_size, in generic_rndis_bind()
378 1 << le32_to_cpu(u.init_c->packet_alignment)); in generic_rndis_bind()
382 if (dev->driver_info->early_init && in generic_rndis_bind()
383 dev->driver_info->early_init(dev) != 0) in generic_rndis_bind()
399 netif_dbg(dev, probe, dev->net, in generic_rndis_bind()
401 retval = -ENODEV; in generic_rndis_bind()
406 netif_dbg(dev, probe, dev->net, in generic_rndis_bind()
407 "driver requires non-wireless physical medium, but device is wireless.\n"); in generic_rndis_bind()
408 retval = -ENODEV; in generic_rndis_bind()
418 dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval); in generic_rndis_bind()
426 u.set->msg_type = cpu_to_le32(RNDIS_MSG_SET); in generic_rndis_bind()
427 u.set->msg_len = cpu_to_le32(4 + sizeof *u.set); in generic_rndis_bind()
428 u.set->oid = cpu_to_le32(RNDIS_OID_GEN_CURRENT_PACKET_FILTER); in generic_rndis_bind()
429 u.set->len = cpu_to_le32(4); in generic_rndis_bind()
430 u.set->offset = cpu_to_le32((sizeof *u.set) - 8); in generic_rndis_bind()
435 dev_err(&intf->dev, "rndis set packet filter, %d\n", retval); in generic_rndis_bind()
446 u.halt->msg_type = cpu_to_le32(RNDIS_MSG_HALT); in generic_rndis_bind()
447 u.halt->msg_len = cpu_to_le32(sizeof *u.halt); in generic_rndis_bind()
450 usb_set_intfdata(info->data, NULL); in generic_rndis_bind()
451 usb_driver_release_interface(driver_of(intf), info->data); in generic_rndis_bind()
452 info->data = NULL; in generic_rndis_bind()
468 if (!status && (dev->net->dev_addr[0] & 0x02)) in zte_rndis_bind()
469 eth_hw_addr_random(dev->net); in zte_rndis_bind()
481 halt->msg_type = cpu_to_le32(RNDIS_MSG_HALT); in rndis_unbind()
482 halt->msg_len = cpu_to_le32(sizeof *halt); in rndis_unbind()
492 * DATA -- host must not write zlps
499 if (skb->len < dev->net->hard_header_len) in rndis_rx_fixup()
502 dst_mac_fixup = !!(dev->driver_info->data & RNDIS_DRIVER_DATA_DST_MAC_FIXUP); in rndis_rx_fixup()
505 while (likely(skb->len)) { in rndis_rx_fixup()
506 struct rndis_data_hdr *hdr = (void *)skb->data; in rndis_rx_fixup()
510 msg_type = le32_to_cpu(hdr->msg_type); in rndis_rx_fixup()
511 msg_len = le32_to_cpu(hdr->msg_len); in rndis_rx_fixup()
512 data_offset = le32_to_cpu(hdr->data_offset); in rndis_rx_fixup()
513 data_len = le32_to_cpu(hdr->data_len); in rndis_rx_fixup()
515 /* don't choke if we see oob, per-packet data, etc */ in rndis_rx_fixup()
516 if (unlikely(msg_type != RNDIS_MSG_PACKET || skb->len < msg_len in rndis_rx_fixup()
518 dev->net->stats.rx_frame_errors++; in rndis_rx_fixup()
519 netdev_dbg(dev->net, "bad rndis message %d/%d/%d/%d, len %d\n", in rndis_rx_fixup()
520 le32_to_cpu(hdr->msg_type), in rndis_rx_fixup()
521 msg_len, data_offset, data_len, skb->len); in rndis_rx_fixup()
527 if (likely((data_len - skb->len) <= sizeof *hdr)) { in rndis_rx_fixup()
536 skb_pull(skb, msg_len - sizeof *hdr); in rndis_rx_fixup()
558 unsigned len = skb->len; in rndis_tx_fixup()
563 /* enough head room as-is? */ in rndis_tx_fixup()
570 skb->data = memmove(skb->head + sizeof *hdr, in rndis_tx_fixup()
571 skb->data, len); in rndis_tx_fixup()
590 hdr->msg_type = cpu_to_le32(RNDIS_MSG_PACKET); in rndis_tx_fixup()
591 hdr->msg_len = cpu_to_le32(skb->len); in rndis_tx_fixup()
592 hdr->data_offset = cpu_to_le32(sizeof(*hdr) - 8); in rndis_tx_fixup()
593 hdr->data_len = cpu_to_le32(len); in rndis_tx_fixup()
633 /*-------------------------------------------------------------------------*/
639 USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
644 USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
652 /* ZTE WWAN modules, ACM flavour */
654 USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
657 /* RNDIS is MSFT's un-official variant of CDC ACM */
658 USB_INTERFACE_INFO(USB_CLASS_COMM, 2 /* ACM */, 0x0ff),