diff options
Diffstat (limited to 'drivers/net/usb/int51x1.c')
| -rw-r--r-- | drivers/net/usb/int51x1.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/drivers/net/usb/int51x1.c b/drivers/net/usb/int51x1.c new file mode 100644 index 000000000..6fde41550 --- /dev/null +++ b/drivers/net/usb/int51x1.c @@ -0,0 +1,189 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2009 Peter Holik + * + * Intellon usb PLC (Powerline Communications) usb net driver + * + * http://www.tandel.be/downloads/INT51X1_Datasheet.pdf + * + * Based on the work of Jan 'RedBully' Seiffert + */ + +/* + */ + +#include <linux/module.h> +#include <linux/ctype.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.h> +#include <linux/slab.h> +#include <linux/mii.h> +#include <linux/usb.h> +#include <linux/usb/usbnet.h> + +#define INT51X1_VENDOR_ID 0x09e1 +#define INT51X1_PRODUCT_ID 0x5121 + +#define INT51X1_HEADER_SIZE 2 /* 2 byte header */ + +#define PACKET_TYPE_PROMISCUOUS (1 << 0) +#define PACKET_TYPE_ALL_MULTICAST (1 << 1) /* no filter */ +#define PACKET_TYPE_DIRECTED (1 << 2) +#define PACKET_TYPE_BROADCAST (1 << 3) +#define PACKET_TYPE_MULTICAST (1 << 4) /* filtered */ + +#define SET_ETHERNET_PACKET_FILTER 0x43 + +static int int51x1_rx_fixup(struct usbnet *dev, struct sk_buff *skb) +{ + int len; + + if (!(pskb_may_pull(skb, INT51X1_HEADER_SIZE))) { + netdev_err(dev->net, "unexpected tiny rx frame\n"); + return 0; + } + + len = le16_to_cpu(*(__le16 *)&skb->data[skb->len - 2]); + + skb_trim(skb, len); + + return 1; +} + +static struct sk_buff *int51x1_tx_fixup(struct usbnet *dev, + struct sk_buff *skb, gfp_t flags) +{ + int pack_len = skb->len; + int pack_with_header_len = pack_len + INT51X1_HEADER_SIZE; + int headroom = skb_headroom(skb); + int tailroom = skb_tailroom(skb); + int need_tail = 0; + __le16 *len; + + /* if packet and our header is smaller than 64 pad to 64 (+ ZLP) */ + if ((pack_with_header_len) < dev->maxpacket) + need_tail = dev->maxpacket - pack_with_header_len + 1; + /* + * usbnet would send a ZLP if packetlength mod urbsize == 0 for us, + * but we need to know ourself, because this would add to the length + * we send down to the device... + */ + else if (!(pack_with_header_len % dev->maxpacket)) + need_tail = 1; + + if (!skb_cloned(skb) && + (headroom + tailroom >= need_tail + INT51X1_HEADER_SIZE)) { + if (headroom < INT51X1_HEADER_SIZE || tailroom < need_tail) { + skb->data = memmove(skb->head + INT51X1_HEADER_SIZE, + skb->data, skb->len); + skb_set_tail_pointer(skb, skb->len); + } + } else { + struct sk_buff *skb2; + + skb2 = skb_copy_expand(skb, + INT51X1_HEADER_SIZE, + need_tail, + flags); + dev_kfree_skb_any(skb); + if (!skb2) + return NULL; + skb = skb2; + } + + pack_len += need_tail; + pack_len &= 0x07ff; + + len = __skb_push(skb, INT51X1_HEADER_SIZE); + *len = cpu_to_le16(pack_len); + + if(need_tail) + __skb_put_zero(skb, need_tail); + + return skb; +} + +static void int51x1_set_multicast(struct net_device *netdev) +{ + struct usbnet *dev = netdev_priv(netdev); + u16 filter = PACKET_TYPE_DIRECTED | PACKET_TYPE_BROADCAST; + + if (netdev->flags & IFF_PROMISC) { + /* do not expect to see traffic of other PLCs */ + filter |= PACKET_TYPE_PROMISCUOUS; + netdev_info(dev->net, "promiscuous mode enabled\n"); + } else if (!netdev_mc_empty(netdev) || + (netdev->flags & IFF_ALLMULTI)) { + filter |= PACKET_TYPE_ALL_MULTICAST; + netdev_dbg(dev->net, "receive all multicast enabled\n"); + } else { + /* ~PROMISCUOUS, ~MULTICAST */ + netdev_dbg(dev->net, "receive own packets only\n"); + } + + usbnet_write_cmd_async(dev, SET_ETHERNET_PACKET_FILTER, + USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, + filter, 0, NULL, 0); +} + +static const struct net_device_ops int51x1_netdev_ops = { + .ndo_open = usbnet_open, + .ndo_stop = usbnet_stop, + .ndo_start_xmit = usbnet_start_xmit, + .ndo_tx_timeout = usbnet_tx_timeout, + .ndo_change_mtu = usbnet_change_mtu, + .ndo_get_stats64 = dev_get_tstats64, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_rx_mode = int51x1_set_multicast, +}; + +static int int51x1_bind(struct usbnet *dev, struct usb_interface *intf) +{ + int status = usbnet_get_ethernet_addr(dev, 3); + + if (status) + return status; + + dev->net->hard_header_len += INT51X1_HEADER_SIZE; + dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; + dev->net->netdev_ops = &int51x1_netdev_ops; + + return usbnet_get_endpoints(dev, intf); +} + +static const struct driver_info int51x1_info = { + .description = "Intellon usb powerline adapter", + .bind = int51x1_bind, + .rx_fixup = int51x1_rx_fixup, + .tx_fixup = int51x1_tx_fixup, + .in = 1, + .out = 2, + .flags = FLAG_ETHER, +}; + +static const struct usb_device_id products[] = { + { + USB_DEVICE(INT51X1_VENDOR_ID, INT51X1_PRODUCT_ID), + .driver_info = (unsigned long) &int51x1_info, + }, + {}, +}; +MODULE_DEVICE_TABLE(usb, products); + +static struct usb_driver int51x1_driver = { + .name = "int51x1", + .id_table = products, + .probe = usbnet_probe, + .disconnect = usbnet_disconnect, + .suspend = usbnet_suspend, + .resume = usbnet_resume, + .disable_hub_initiated_lpm = 1, +}; + +module_usb_driver(int51x1_driver); + +MODULE_AUTHOR("Peter Holik"); +MODULE_DESCRIPTION("Intellon usb powerline adapter"); +MODULE_LICENSE("GPL"); |