diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/net/usb/rndis_host.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/net/usb/rndis_host.c | 642 |
1 files changed, 0 insertions, 642 deletions
diff --git a/ANDROID_3.4.5/drivers/net/usb/rndis_host.c b/ANDROID_3.4.5/drivers/net/usb/rndis_host.c deleted file mode 100644 index c8f1b5b3..00000000 --- a/ANDROID_3.4.5/drivers/net/usb/rndis_host.c +++ /dev/null @@ -1,642 +0,0 @@ -/* - * Host Side support for RNDIS Networking Links - * Copyright (C) 2005 by David Brownell - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ -#include <linux/module.h> -#include <linux/init.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/ethtool.h> -#include <linux/workqueue.h> -#include <linux/slab.h> -#include <linux/mii.h> -#include <linux/usb.h> -#include <linux/usb/cdc.h> -#include <linux/usb/usbnet.h> -#include <linux/usb/rndis_host.h> - - -/* - * RNDIS is NDIS remoted over USB. It's a MSFT variant of CDC ACM ... of - * course ACM was intended for modems, not Ethernet links! USB's standard - * for Ethernet links is "CDC Ethernet", which is significantly simpler. - * - * NOTE that Microsoft's "RNDIS 1.0" specification is incomplete. Issues - * include: - * - Power management in particular relies on information that's scattered - * through other documentation, and which is incomplete or incorrect even - * there. - * - There are various undocumented protocol requirements, such as the - * need to send unused garbage in control-OUT messages. - * - In some cases, MS-Windows will emit undocumented requests; this - * matters more to peripheral implementations than host ones. - * - * Moreover there's a no-open-specs variant of RNDIS called "ActiveSync". - * - * For these reasons and others, ** USE OF RNDIS IS STRONGLY DISCOURAGED ** in - * favor of such non-proprietary alternatives as CDC Ethernet or the newer (and - * currently rare) "Ethernet Emulation Model" (EEM). - */ - -/* - * RNDIS notifications from device: command completion; "reverse" - * keepalives; etc - */ -void rndis_status(struct usbnet *dev, struct urb *urb) -{ - netdev_dbg(dev->net, "rndis status urb, len %d stat %d\n", - urb->actual_length, urb->status); - // FIXME for keepalives, respond immediately (asynchronously) - // if not an RNDIS status, do like cdc_status(dev,urb) does -} -EXPORT_SYMBOL_GPL(rndis_status); - -/* - * RNDIS indicate messages. - */ -static void rndis_msg_indicate(struct usbnet *dev, struct rndis_indicate *msg, - int buflen) -{ - struct cdc_state *info = (void *)&dev->data; - struct device *udev = &info->control->dev; - - if (dev->driver_info->indication) { - dev->driver_info->indication(dev, msg, buflen); - } else { - switch (msg->status) { - case RNDIS_STATUS_MEDIA_CONNECT: - dev_info(udev, "rndis media connect\n"); - break; - case RNDIS_STATUS_MEDIA_DISCONNECT: - dev_info(udev, "rndis media disconnect\n"); - break; - default: - dev_info(udev, "rndis indication: 0x%08x\n", - le32_to_cpu(msg->status)); - } - } -} - -/* - * RPC done RNDIS-style. Caller guarantees: - * - message is properly byteswapped - * - there's no other request pending - * - buf can hold up to 1KB response (required by RNDIS spec) - * On return, the first few entries are already byteswapped. - * - * Call context is likely probe(), before interface name is known, - * which is why we won't try to use it in the diagnostics. - */ -int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf, int buflen) -{ - struct cdc_state *info = (void *) &dev->data; - struct usb_cdc_notification notification; - int master_ifnum; - int retval; - int partial; - unsigned count; - __le32 rsp; - u32 xid = 0, msg_len, request_id; - - /* REVISIT when this gets called from contexts other than probe() or - * disconnect(): either serialize, or dispatch responses on xid - */ - - /* Issue the request; xid is unique, don't bother byteswapping it */ - if (likely(buf->msg_type != RNDIS_MSG_HALT && - buf->msg_type != RNDIS_MSG_RESET)) { - xid = dev->xid++; - if (!xid) - xid = dev->xid++; - buf->request_id = (__force __le32) xid; - } - master_ifnum = info->control->cur_altsetting->desc.bInterfaceNumber; - retval = usb_control_msg(dev->udev, - usb_sndctrlpipe(dev->udev, 0), - USB_CDC_SEND_ENCAPSULATED_COMMAND, - USB_TYPE_CLASS | USB_RECIP_INTERFACE, - 0, master_ifnum, - buf, le32_to_cpu(buf->msg_len), - RNDIS_CONTROL_TIMEOUT_MS); - if (unlikely(retval < 0 || xid == 0)) - return retval; - - /* Some devices don't respond on the control channel until - * polled on the status channel, so do that first. */ - if (dev->driver_info->data & RNDIS_DRIVER_DATA_POLL_STATUS) { - retval = usb_interrupt_msg( - dev->udev, - usb_rcvintpipe(dev->udev, - dev->status->desc.bEndpointAddress), - ¬ification, sizeof(notification), &partial, - RNDIS_CONTROL_TIMEOUT_MS); - if (unlikely(retval < 0)) - return retval; - } - - /* Poll the control channel; the request probably completed immediately */ - rsp = buf->msg_type | RNDIS_MSG_COMPLETION; - for (count = 0; count < 10; count++) { - memset(buf, 0, CONTROL_BUFFER_SIZE); - retval = usb_control_msg(dev->udev, - usb_rcvctrlpipe(dev->udev, 0), - USB_CDC_GET_ENCAPSULATED_RESPONSE, - USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, - 0, master_ifnum, - buf, buflen, - RNDIS_CONTROL_TIMEOUT_MS); - if (likely(retval >= 8)) { - msg_len = le32_to_cpu(buf->msg_len); - request_id = (__force u32) buf->request_id; - if (likely(buf->msg_type == rsp)) { - if (likely(request_id == xid)) { - if (unlikely(rsp == RNDIS_MSG_RESET_C)) - return 0; - if (likely(RNDIS_STATUS_SUCCESS - == buf->status)) - return 0; - dev_dbg(&info->control->dev, - "rndis reply status %08x\n", - le32_to_cpu(buf->status)); - return -EL3RST; - } - dev_dbg(&info->control->dev, - "rndis reply id %d expected %d\n", - request_id, xid); - /* then likely retry */ - } else switch (buf->msg_type) { - case RNDIS_MSG_INDICATE: /* fault/event */ - rndis_msg_indicate(dev, (void *)buf, buflen); - - break; - case RNDIS_MSG_KEEPALIVE: { /* ping */ - struct rndis_keepalive_c *msg = (void *)buf; - - msg->msg_type = RNDIS_MSG_KEEPALIVE_C; - msg->msg_len = cpu_to_le32(sizeof *msg); - msg->status = RNDIS_STATUS_SUCCESS; - retval = usb_control_msg(dev->udev, - usb_sndctrlpipe(dev->udev, 0), - USB_CDC_SEND_ENCAPSULATED_COMMAND, - USB_TYPE_CLASS | USB_RECIP_INTERFACE, - 0, master_ifnum, - msg, sizeof *msg, - RNDIS_CONTROL_TIMEOUT_MS); - if (unlikely(retval < 0)) - dev_dbg(&info->control->dev, - "rndis keepalive err %d\n", - retval); - } - break; - default: - dev_dbg(&info->control->dev, - "unexpected rndis msg %08x len %d\n", - le32_to_cpu(buf->msg_type), msg_len); - } - } else { - /* device probably issued a protocol stall; ignore */ - dev_dbg(&info->control->dev, - "rndis response error, code %d\n", retval); - } - msleep(20); - } - dev_dbg(&info->control->dev, "rndis response timeout\n"); - return -ETIMEDOUT; -} -EXPORT_SYMBOL_GPL(rndis_command); - -/* - * rndis_query: - * - * Performs a query for @oid along with 0 or more bytes of payload as - * specified by @in_len. If @reply_len is not set to -1 then the reply - * length is checked against this value, resulting in an error if it - * doesn't match. - * - * NOTE: Adding a payload exactly or greater than the size of the expected - * response payload is an evident requirement MSFT added for ActiveSync. - * - * The only exception is for OIDs that return a variably sized response, - * in which case no payload should be added. This undocumented (and - * nonsensical!) issue was found by sniffing protocol requests from the - * ActiveSync 4.1 Windows driver. - */ -static int rndis_query(struct usbnet *dev, struct usb_interface *intf, - void *buf, __le32 oid, u32 in_len, - void **reply, int *reply_len) -{ - int retval; - union { - void *buf; - struct rndis_msg_hdr *header; - struct rndis_query *get; - struct rndis_query_c *get_c; - } u; - u32 off, len; - - u.buf = buf; - - memset(u.get, 0, sizeof *u.get + in_len); - u.get->msg_type = RNDIS_MSG_QUERY; - u.get->msg_len = cpu_to_le32(sizeof *u.get + in_len); - u.get->oid = oid; - u.get->len = cpu_to_le32(in_len); - u.get->offset = cpu_to_le32(20); - - retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE); - if (unlikely(retval < 0)) { - dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) failed, %d\n", - oid, retval); - return retval; - } - - off = le32_to_cpu(u.get_c->offset); - len = le32_to_cpu(u.get_c->len); - if (unlikely((8 + off + len) > CONTROL_BUFFER_SIZE)) - goto response_error; - - if (*reply_len != -1 && len != *reply_len) - goto response_error; - - *reply = (unsigned char *) &u.get_c->request_id + off; - *reply_len = len; - - return retval; - -response_error: - dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) " - "invalid response - off %d len %d\n", - oid, off, len); - return -EDOM; -} - -/* same as usbnet_netdev_ops but MTU change not allowed */ -static const struct net_device_ops rndis_netdev_ops = { - .ndo_open = usbnet_open, - .ndo_stop = usbnet_stop, - .ndo_start_xmit = usbnet_start_xmit, - .ndo_tx_timeout = usbnet_tx_timeout, - .ndo_set_mac_address = eth_mac_addr, - .ndo_validate_addr = eth_validate_addr, -}; - -int -generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags) -{ - int retval; - struct net_device *net = dev->net; - struct cdc_state *info = (void *) &dev->data; - union { - void *buf; - struct rndis_msg_hdr *header; - struct rndis_init *init; - struct rndis_init_c *init_c; - struct rndis_query *get; - struct rndis_query_c *get_c; - struct rndis_set *set; - struct rndis_set_c *set_c; - struct rndis_halt *halt; - } u; - u32 tmp; - __le32 phym_unspec, *phym; - int reply_len; - unsigned char *bp; - - /* we can't rely on i/o from stack working, or stack allocation */ - u.buf = kmalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL); - if (!u.buf) - return -ENOMEM; - retval = usbnet_generic_cdc_bind(dev, intf); - if (retval < 0) - goto fail; - - u.init->msg_type = RNDIS_MSG_INIT; - u.init->msg_len = cpu_to_le32(sizeof *u.init); - u.init->major_version = cpu_to_le32(1); - u.init->minor_version = cpu_to_le32(0); - - /* max transfer (in spec) is 0x4000 at full speed, but for - * TX we'll stick to one Ethernet packet plus RNDIS framing. - * For RX we handle drivers that zero-pad to end-of-packet. - * Don't let userspace change these settings. - * - * NOTE: there still seems to be wierdness here, as if we need - * to do some more things to make sure WinCE targets accept this. - * They default to jumbograms of 8KB or 16KB, which is absurd - * for such low data rates and which is also more than Linux - * can usually expect to allocate for SKB data... - */ - net->hard_header_len += sizeof (struct rndis_data_hdr); - dev->hard_mtu = net->mtu + net->hard_header_len; - - dev->maxpacket = usb_maxpacket(dev->udev, dev->out, 1); - if (dev->maxpacket == 0) { - netif_dbg(dev, probe, dev->net, - "dev->maxpacket can't be 0\n"); - retval = -EINVAL; - goto fail_and_release; - } - - dev->rx_urb_size = dev->hard_mtu + (dev->maxpacket + 1); - dev->rx_urb_size &= ~(dev->maxpacket - 1); - u.init->max_transfer_size = cpu_to_le32(dev->rx_urb_size); - - net->netdev_ops = &rndis_netdev_ops; - - retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE); - if (unlikely(retval < 0)) { - /* it might not even be an RNDIS device!! */ - dev_err(&intf->dev, "RNDIS init failed, %d\n", retval); - goto fail_and_release; - } - tmp = le32_to_cpu(u.init_c->max_transfer_size); - if (tmp < dev->hard_mtu) { - if (tmp <= net->hard_header_len) { - dev_err(&intf->dev, - "dev can't take %u byte packets (max %u)\n", - dev->hard_mtu, tmp); - retval = -EINVAL; - goto halt_fail_and_release; - } - dev_warn(&intf->dev, - "dev can't take %u byte packets (max %u), " - "adjusting MTU to %u\n", - dev->hard_mtu, tmp, tmp - net->hard_header_len); - dev->hard_mtu = tmp; - net->mtu = dev->hard_mtu - net->hard_header_len; - } - - /* REVISIT: peripheral "alignment" request is ignored ... */ - dev_dbg(&intf->dev, - "hard mtu %u (%u from dev), rx buflen %Zu, align %d\n", - dev->hard_mtu, tmp, dev->rx_urb_size, - 1 << le32_to_cpu(u.init_c->packet_alignment)); - - /* module has some device initialization code needs to be done right - * after RNDIS_INIT */ - if (dev->driver_info->early_init && - dev->driver_info->early_init(dev) != 0) - goto halt_fail_and_release; - - /* Check physical medium */ - phym = NULL; - reply_len = sizeof *phym; - retval = rndis_query(dev, intf, u.buf, OID_GEN_PHYSICAL_MEDIUM, - 0, (void **) &phym, &reply_len); - if (retval != 0 || !phym) { - /* OID is optional so don't fail here. */ - phym_unspec = RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED; - phym = &phym_unspec; - } - if ((flags & FLAG_RNDIS_PHYM_WIRELESS) && - *phym != RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) { - netif_dbg(dev, probe, dev->net, - "driver requires wireless physical medium, but device is not\n"); - retval = -ENODEV; - goto halt_fail_and_release; - } - if ((flags & FLAG_RNDIS_PHYM_NOT_WIRELESS) && - *phym == RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) { - netif_dbg(dev, probe, dev->net, - "driver requires non-wireless physical medium, but device is wireless.\n"); - retval = -ENODEV; - goto halt_fail_and_release; - } - - /* Get designated host ethernet address */ - reply_len = ETH_ALEN; - retval = rndis_query(dev, intf, u.buf, OID_802_3_PERMANENT_ADDRESS, - 48, (void **) &bp, &reply_len); - if (unlikely(retval< 0)) { - dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval); - goto halt_fail_and_release; - } - memcpy(net->dev_addr, bp, ETH_ALEN); - memcpy(net->perm_addr, bp, ETH_ALEN); - - /* set a nonzero filter to enable data transfers */ - memset(u.set, 0, sizeof *u.set); - u.set->msg_type = RNDIS_MSG_SET; - u.set->msg_len = cpu_to_le32(4 + sizeof *u.set); - u.set->oid = OID_GEN_CURRENT_PACKET_FILTER; - u.set->len = cpu_to_le32(4); - u.set->offset = cpu_to_le32((sizeof *u.set) - 8); - *(__le32 *)(u.buf + sizeof *u.set) = RNDIS_DEFAULT_FILTER; - - retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE); - if (unlikely(retval < 0)) { - dev_err(&intf->dev, "rndis set packet filter, %d\n", retval); - goto halt_fail_and_release; - } - - retval = 0; - - kfree(u.buf); - return retval; - -halt_fail_and_release: - memset(u.halt, 0, sizeof *u.halt); - u.halt->msg_type = RNDIS_MSG_HALT; - u.halt->msg_len = cpu_to_le32(sizeof *u.halt); - (void) rndis_command(dev, (void *)u.halt, CONTROL_BUFFER_SIZE); -fail_and_release: - usb_set_intfdata(info->data, NULL); - usb_driver_release_interface(driver_of(intf), info->data); - info->data = NULL; -fail: - kfree(u.buf); - return retval; -} -EXPORT_SYMBOL_GPL(generic_rndis_bind); - -static int rndis_bind(struct usbnet *dev, struct usb_interface *intf) -{ - return generic_rndis_bind(dev, intf, FLAG_RNDIS_PHYM_NOT_WIRELESS); -} - -void rndis_unbind(struct usbnet *dev, struct usb_interface *intf) -{ - struct rndis_halt *halt; - - /* try to clear any rndis state/activity (no i/o from stack!) */ - halt = kzalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL); - if (halt) { - halt->msg_type = RNDIS_MSG_HALT; - halt->msg_len = cpu_to_le32(sizeof *halt); - (void) rndis_command(dev, (void *)halt, CONTROL_BUFFER_SIZE); - kfree(halt); - } - - usbnet_cdc_unbind(dev, intf); -} -EXPORT_SYMBOL_GPL(rndis_unbind); - -/* - * DATA -- host must not write zlps - */ -int rndis_rx_fixup(struct usbnet *dev, struct sk_buff *skb) -{ - /* peripheral may have batched packets to us... */ - while (likely(skb->len)) { - struct rndis_data_hdr *hdr = (void *)skb->data; - struct sk_buff *skb2; - u32 msg_len, data_offset, data_len; - - msg_len = le32_to_cpu(hdr->msg_len); - data_offset = le32_to_cpu(hdr->data_offset); - data_len = le32_to_cpu(hdr->data_len); - - /* don't choke if we see oob, per-packet data, etc */ - if (unlikely(hdr->msg_type != RNDIS_MSG_PACKET || - skb->len < msg_len || - (data_offset + data_len + 8) > msg_len)) { - dev->net->stats.rx_frame_errors++; - netdev_dbg(dev->net, "bad rndis message %d/%d/%d/%d, len %d\n", - le32_to_cpu(hdr->msg_type), - msg_len, data_offset, data_len, skb->len); - return 0; - } - skb_pull(skb, 8 + data_offset); - - /* at most one packet left? */ - if (likely((data_len - skb->len) <= sizeof *hdr)) { - skb_trim(skb, data_len); - break; - } - - /* try to return all the packets in the batch */ - skb2 = skb_clone(skb, GFP_ATOMIC); - if (unlikely(!skb2)) - break; - skb_pull(skb, msg_len - sizeof *hdr); - skb_trim(skb2, data_len); - usbnet_skb_return(dev, skb2); - } - - /* caller will usbnet_skb_return the remaining packet */ - return 1; -} -EXPORT_SYMBOL_GPL(rndis_rx_fixup); - -struct sk_buff * -rndis_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) -{ - struct rndis_data_hdr *hdr; - struct sk_buff *skb2; - unsigned len = skb->len; - - if (likely(!skb_cloned(skb))) { - int room = skb_headroom(skb); - - /* enough head room as-is? */ - if (unlikely((sizeof *hdr) <= room)) - goto fill; - - /* enough room, but needs to be readjusted? */ - room += skb_tailroom(skb); - if (likely((sizeof *hdr) <= room)) { - skb->data = memmove(skb->head + sizeof *hdr, - skb->data, len); - skb_set_tail_pointer(skb, len); - goto fill; - } - } - - /* create a new skb, with the correct size (and tailpad) */ - skb2 = skb_copy_expand(skb, sizeof *hdr, 1, flags); - dev_kfree_skb_any(skb); - if (unlikely(!skb2)) - return skb2; - skb = skb2; - - /* fill out the RNDIS header. we won't bother trying to batch - * packets; Linux minimizes wasted bandwidth through tx queues. - */ -fill: - hdr = (void *) __skb_push(skb, sizeof *hdr); - memset(hdr, 0, sizeof *hdr); - hdr->msg_type = RNDIS_MSG_PACKET; - hdr->msg_len = cpu_to_le32(skb->len); - hdr->data_offset = cpu_to_le32(sizeof(*hdr) - 8); - hdr->data_len = cpu_to_le32(len); - - /* FIXME make the last packet always be short ... */ - return skb; -} -EXPORT_SYMBOL_GPL(rndis_tx_fixup); - - -static const struct driver_info rndis_info = { - .description = "RNDIS device", - .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT, - .bind = rndis_bind, - .unbind = rndis_unbind, - .status = rndis_status, - .rx_fixup = rndis_rx_fixup, - .tx_fixup = rndis_tx_fixup, -}; - -static const struct driver_info rndis_poll_status_info = { - .description = "RNDIS device (poll status before control)", - .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT, - .data = RNDIS_DRIVER_DATA_POLL_STATUS, - .bind = rndis_bind, - .unbind = rndis_unbind, - .status = rndis_status, - .rx_fixup = rndis_rx_fixup, - .tx_fixup = rndis_tx_fixup, -}; - -/*-------------------------------------------------------------------------*/ - -static const struct usb_device_id products [] = { -{ - /* 2Wire HomePortal 1000SW */ - USB_DEVICE_AND_INTERFACE_INFO(0x1630, 0x0042, - USB_CLASS_COMM, 2 /* ACM */, 0x0ff), - .driver_info = (unsigned long) &rndis_poll_status_info, -}, { - /* RNDIS is MSFT's un-official variant of CDC ACM */ - USB_INTERFACE_INFO(USB_CLASS_COMM, 2 /* ACM */, 0x0ff), - .driver_info = (unsigned long) &rndis_info, -}, { - /* "ActiveSync" is an undocumented variant of RNDIS, used in WM5 */ - USB_INTERFACE_INFO(USB_CLASS_MISC, 1, 1), - .driver_info = (unsigned long) &rndis_poll_status_info, -}, { - /* RNDIS for tethering */ - USB_INTERFACE_INFO(USB_CLASS_WIRELESS_CONTROLLER, 1, 3), - .driver_info = (unsigned long) &rndis_info, -}, - { }, // END -}; -MODULE_DEVICE_TABLE(usb, products); - -static struct usb_driver rndis_driver = { - .name = "rndis_host", - .id_table = products, - .probe = usbnet_probe, - .disconnect = usbnet_disconnect, - .suspend = usbnet_suspend, - .resume = usbnet_resume, -}; - -module_usb_driver(rndis_driver); - -MODULE_AUTHOR("David Brownell"); -MODULE_DESCRIPTION("USB Host side RNDIS driver"); -MODULE_LICENSE("GPL"); |