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15e9abc270
The int51x1 driver uses the same requests as USB CDC to handle packet filtering, but provides its own definitions and function to handle it. The chip datasheet says the requests are CDC compliant. Replace this unnecessary code with a reference to usbnet_cdc_update_filter. Also fix the broken datasheet link and remove an empty comment. Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com> Link: https://patch.msgid.link/20260126044049.40359-1-enelsonmoore@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
157 lines
3.9 KiB
C
157 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2009 Peter Holik
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*
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* Intellon usb PLC (Powerline Communications) usb net driver
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*
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* https://web.archive.org/web/20101025091240id_/http://www.tandel.be/downloads/INT51X1_Datasheet.pdf
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*
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* Based on the work of Jan 'RedBully' Seiffert
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*/
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#include <linux/module.h>
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#include <linux/ctype.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/slab.h>
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#include <linux/mii.h>
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#include <linux/usb.h>
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#include <linux/usb/usbnet.h>
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#define INT51X1_VENDOR_ID 0x09e1
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#define INT51X1_PRODUCT_ID 0x5121
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#define INT51X1_HEADER_SIZE 2 /* 2 byte header */
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static int int51x1_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
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{
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int len;
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if (!(pskb_may_pull(skb, INT51X1_HEADER_SIZE))) {
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netdev_err(dev->net, "unexpected tiny rx frame\n");
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return 0;
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}
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len = le16_to_cpu(*(__le16 *)&skb->data[skb->len - 2]);
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skb_trim(skb, len);
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return 1;
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}
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static struct sk_buff *int51x1_tx_fixup(struct usbnet *dev,
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struct sk_buff *skb, gfp_t flags)
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{
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int pack_len = skb->len;
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int pack_with_header_len = pack_len + INT51X1_HEADER_SIZE;
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int headroom = skb_headroom(skb);
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int tailroom = skb_tailroom(skb);
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int need_tail = 0;
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__le16 *len;
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/* if packet and our header is smaller than 64 pad to 64 (+ ZLP) */
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if ((pack_with_header_len) < dev->maxpacket)
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need_tail = dev->maxpacket - pack_with_header_len + 1;
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/*
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* usbnet would send a ZLP if packetlength mod urbsize == 0 for us,
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* but we need to know ourself, because this would add to the length
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* we send down to the device...
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*/
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else if (!(pack_with_header_len % dev->maxpacket))
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need_tail = 1;
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if (!skb_cloned(skb) &&
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(headroom + tailroom >= need_tail + INT51X1_HEADER_SIZE)) {
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if (headroom < INT51X1_HEADER_SIZE || tailroom < need_tail) {
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skb->data = memmove(skb->head + INT51X1_HEADER_SIZE,
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skb->data, skb->len);
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skb_set_tail_pointer(skb, skb->len);
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}
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} else {
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struct sk_buff *skb2;
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skb2 = skb_copy_expand(skb,
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INT51X1_HEADER_SIZE,
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need_tail,
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flags);
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dev_kfree_skb_any(skb);
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if (!skb2)
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return NULL;
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skb = skb2;
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}
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pack_len += need_tail;
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pack_len &= 0x07ff;
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len = __skb_push(skb, INT51X1_HEADER_SIZE);
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*len = cpu_to_le16(pack_len);
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if(need_tail)
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__skb_put_zero(skb, need_tail);
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return skb;
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}
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static const struct net_device_ops int51x1_netdev_ops = {
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.ndo_open = usbnet_open,
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.ndo_stop = usbnet_stop,
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.ndo_start_xmit = usbnet_start_xmit,
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.ndo_tx_timeout = usbnet_tx_timeout,
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.ndo_change_mtu = usbnet_change_mtu,
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.ndo_get_stats64 = dev_get_tstats64,
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.ndo_set_mac_address = eth_mac_addr,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_set_rx_mode = usbnet_set_rx_mode,
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};
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static int int51x1_bind(struct usbnet *dev, struct usb_interface *intf)
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{
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int status = usbnet_get_ethernet_addr(dev, 3);
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if (status)
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return status;
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dev->net->hard_header_len += INT51X1_HEADER_SIZE;
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dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
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dev->net->netdev_ops = &int51x1_netdev_ops;
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return usbnet_get_endpoints(dev, intf);
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}
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static const struct driver_info int51x1_info = {
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.description = "Intellon usb powerline adapter",
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.bind = int51x1_bind,
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.rx_fixup = int51x1_rx_fixup,
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.tx_fixup = int51x1_tx_fixup,
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.set_rx_mode = usbnet_cdc_update_filter,
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.in = 1,
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.out = 2,
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.flags = FLAG_ETHER,
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};
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static const struct usb_device_id products[] = {
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{
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USB_DEVICE(INT51X1_VENDOR_ID, INT51X1_PRODUCT_ID),
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.driver_info = (unsigned long) &int51x1_info,
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},
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{},
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};
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MODULE_DEVICE_TABLE(usb, products);
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static struct usb_driver int51x1_driver = {
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.name = "int51x1",
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.id_table = products,
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.probe = usbnet_probe,
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.disconnect = usbnet_disconnect,
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.suspend = usbnet_suspend,
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.resume = usbnet_resume,
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.disable_hub_initiated_lpm = 1,
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};
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module_usb_driver(int51x1_driver);
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MODULE_AUTHOR("Peter Holik");
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MODULE_DESCRIPTION("Intellon usb powerline adapter");
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MODULE_LICENSE("GPL");
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