diff options
Diffstat (limited to 'drivers/net/usb/dm9601.c')
| -rw-r--r-- | drivers/net/usb/dm9601.c | 57 |
1 files changed, 44 insertions, 13 deletions
diff --git a/drivers/net/usb/dm9601.c b/drivers/net/usb/dm9601.c index c6867f926cff..6e9c344c7a20 100644 --- a/drivers/net/usb/dm9601.c +++ b/drivers/net/usb/dm9601.c @@ -1,5 +1,5 @@ /* - * Davicom DM9601 USB 1.1 10/100Mbps ethernet devices + * Davicom DM96xx USB 10/100Mbps ethernet devices * * Peter Korsgaard <jacmet@sunsite.dk> * @@ -13,7 +13,6 @@ #include <linux/module.h> #include <linux/sched.h> #include <linux/stddef.h> -#include <linux/init.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/ethtool.h> @@ -364,7 +363,12 @@ static int dm9601_bind(struct usbnet *dev, struct usb_interface *intf) dev->net->ethtool_ops = &dm9601_ethtool_ops; dev->net->hard_header_len += DM_TX_OVERHEAD; dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; - dev->rx_urb_size = dev->net->mtu + ETH_HLEN + DM_RX_OVERHEAD; + + /* dm9620/21a require room for 4 byte padding, even in dm9601 + * mode, so we need +1 to be able to receive full size + * ethernet frames. + */ + dev->rx_urb_size = dev->net->mtu + ETH_HLEN + DM_RX_OVERHEAD + 1; dev->mii.dev = dev->net; dev->mii.mdio_read = dm9601_mdio_read; @@ -468,7 +472,7 @@ static int dm9601_rx_fixup(struct usbnet *dev, struct sk_buff *skb) static struct sk_buff *dm9601_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) { - int len; + int len, pad; /* format: b1: packet length low @@ -476,12 +480,23 @@ static struct sk_buff *dm9601_tx_fixup(struct usbnet *dev, struct sk_buff *skb, b3..n: packet data */ - len = skb->len; + len = skb->len + DM_TX_OVERHEAD; - if (skb_headroom(skb) < DM_TX_OVERHEAD) { + /* workaround for dm962x errata with tx fifo getting out of + * sync if a USB bulk transfer retry happens right after a + * packet with odd / maxpacket length by adding up to 3 bytes + * padding. + */ + while ((len & 1) || !(len % dev->maxpacket)) + len++; + + len -= DM_TX_OVERHEAD; /* hw header doesn't count as part of length */ + pad = len - skb->len; + + if (skb_headroom(skb) < DM_TX_OVERHEAD || skb_tailroom(skb) < pad) { struct sk_buff *skb2; - skb2 = skb_copy_expand(skb, DM_TX_OVERHEAD, 0, flags); + skb2 = skb_copy_expand(skb, DM_TX_OVERHEAD, pad, flags); dev_kfree_skb_any(skb); skb = skb2; if (!skb) @@ -490,10 +505,10 @@ static struct sk_buff *dm9601_tx_fixup(struct usbnet *dev, struct sk_buff *skb, __skb_push(skb, DM_TX_OVERHEAD); - /* usbnet adds padding if length is a multiple of packet size - if so, adjust length value in header */ - if ((skb->len % dev->maxpacket) == 0) - len++; + if (pad) { + memset(skb->data + skb->len, 0, pad); + __skb_put(skb, pad); + } skb->data[0] = len; skb->data[1] = len >> 8; @@ -543,7 +558,7 @@ static int dm9601_link_reset(struct usbnet *dev) } static const struct driver_info dm9601_info = { - .description = "Davicom DM9601 USB Ethernet", + .description = "Davicom DM96xx USB 10/100 Ethernet", .flags = FLAG_ETHER | FLAG_LINK_INTR, .bind = dm9601_bind, .rx_fixup = dm9601_rx_fixup, @@ -594,6 +609,22 @@ static const struct usb_device_id products[] = { USB_DEVICE(0x0a46, 0x9620), /* DM9620 USB to Fast Ethernet Adapter */ .driver_info = (unsigned long)&dm9601_info, }, + { + USB_DEVICE(0x0a46, 0x9621), /* DM9621A USB to Fast Ethernet Adapter */ + .driver_info = (unsigned long)&dm9601_info, + }, + { + USB_DEVICE(0x0a46, 0x9622), /* DM9622 USB to Fast Ethernet Adapter */ + .driver_info = (unsigned long)&dm9601_info, + }, + { + USB_DEVICE(0x0a46, 0x0269), /* DM962OA USB to Fast Ethernet Adapter */ + .driver_info = (unsigned long)&dm9601_info, + }, + { + USB_DEVICE(0x0a46, 0x1269), /* DM9621A USB to Fast Ethernet Adapter */ + .driver_info = (unsigned long)&dm9601_info, + }, {}, // END }; @@ -612,5 +643,5 @@ static struct usb_driver dm9601_driver = { module_usb_driver(dm9601_driver); MODULE_AUTHOR("Peter Korsgaard <jacmet@sunsite.dk>"); -MODULE_DESCRIPTION("Davicom DM9601 USB 1.1 ethernet devices"); +MODULE_DESCRIPTION("Davicom DM96xx USB 10/100 ethernet devices"); MODULE_LICENSE("GPL"); |