there is a patch to support GeneSys Logic GL620USB-A chip, which can be
found in GeneLink cables. I have obtained the driver code from David
Brownell, the code comes from Jiun-Jie Huang (Genesys Logic Taiwan) and
I have merged it with linux-2.4.10.
I have author's agreement to include the code as GNU GPL.
I have succeeded in using it for two months (in past with -ac kernels,
now with 2.4.10).
The chip is present also on some mainboards with USB PC2PC support, for
example Microstar MSI K7T266 Pro.
Untested remains co-operation with Windows drivers. Unimplemented is
currently check_connect handshaking (it seems that is is recently
unsupported on all usbnet supported chips).
-- Stanislav Brabec--- linux/drivers/usb/usbnet.c.orig Sat Sep 15 00:04:07 2001 +++ linux/drivers/usb/usbnet.c Tue Sep 25 10:04:24 2001 @@ -19,6 +19,8 @@ * - "Linux Devices" (like iPaq and similar SA-1100 based PDAs) * - NetChip 1080 (interoperates with NetChip Win32 drivers) * - Prolific PL-2301/2302 (replaces "plusb" driver) + * - GeneSys GL620USB/GL620USB-A + * * USB devices can implement their side of this protocol at the cost * of two bulk endpoints; it's not restricted to "cable" applications. @@ -73,6 +75,9 @@ * Win32 Belkin driver; other cleanups (db). * 16-jul-2001 Bugfixes for uhci oops-on-unplug, Belkin support, various * cleanups for problems not yet seen in the field. (db) + * 3-aug-2001 Merged GeneSys driver, using code from + * Jiun-Jie Huang <huangjj@genesyslogic.com.tw> + * by Stanislav Brabec <utx@penguin.cz> * *-------------------------------------------------------------------------*/ @@ -101,6 +106,7 @@ #define CONFIG_USB_LINUXDEV #define CONFIG_USB_NET1080 #define CONFIG_USB_PL2301 +#define CONFIG_USB_GENELINK /*-------------------------------------------------------------------------*/ @@ -162,6 +168,13 @@ struct sk_buff_head done; struct tasklet_struct bh; struct tq_struct ctrl_task; + +#ifdef CONFIG_USB_GENELINK + + // various data structure may be needed + void *priv_data; + +#endif }; // device-specific info used by the driver @@ -170,6 +183,7 @@ int flags; #define FLAG_FRAMING 0x0001 /* guard against device dropouts */ +#define FLAG_GENELINK 0x0002 /* genelink flag */ /* reset device ... can sleep */ int (*reset)(struct usbnet *); @@ -177,6 +191,18 @@ /* see if peer is connected ... can sleep */ int (*check_connect)(struct usbnet *); +#ifdef CONFIG_USB_GENELINK + +// if (dev->driver_info->flags & FLAG_GENELINK) + + /* allocate and initialize the private resources per device */ + int (*initialize_private)(struct usbnet *); + + /* free the private resources per device */ + int (*release_private)(struct usbnet *); + +#endif + // FIXME -- also an interrupt mechanism /* framework currently "knows" bulk EPs talk packets */ @@ -719,6 +745,201 @@ +#ifdef CONFIG_USB_GENELINK +/*------------------------------------------------------------------------- + * + * GeneSys GL620USB/GL620USB-A (www.genesyslogic.com.tw) + * + *-------------------------------------------------------------------------*/ + +// control msg write command +#define GENELINK_CONNECT_WRITE 0xF0 +// interrupt pipe index +#define GENELINK_INTERRUPT_PIPE 0x03 +// interrupt read buffer size +#define INTERRUPT_BUFSIZE 0x08 +// interrupt pipe interval value +#define GENELINK_INTERRUPT_INTERVAL 0x10 +// max transmit packet number per transmit +#define GL_MAX_TRANSMIT_PACKETS 32 +// max packet length +#define GL_MAX_PACKET_LEN 1514 +// max receive buffer size +#define GL_RCV_BUF_SIZE (((GL_MAX_PACKET_LEN + 4) * GL_MAX_TRANSMIT_PACKETS) + 4) + +struct gl_priv +{ + struct urb *irq_urb; + char irq_buf[INTERRUPT_BUFSIZE]; +}; + +struct gl_packet +{ + u32 packet_length; + char packet_data[1]; +}; + +struct gl_header +{ + u32 packet_count; + + struct gl_packet packets; +}; + +static inline int gl_control_write(struct usbnet *dev, u8 request, u16 value) +{ + int retval; + + retval = usb_control_msg (dev->udev, + usb_sndctrlpipe (dev->udev, 0), + request, + USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, + value, + 0, // index + 0, // data buffer + 0, // size + CONTROL_TIMEOUT_JIFFIES); + + return retval; +} + +static void gl_interrupt_complete (struct urb *urb) +{ + int status = urb->status; + + if (status) + dbg("gl_interrupt_complete fail - %X\n", status); + else + dbg("gl_interrupt_complete success...\n"); +} + +static inline int gl_interrupt_read(struct usbnet *dev) +{ + struct gl_priv *priv = dev->priv_data; + int retval; + + // issue usb interrupt read + if (priv && priv->irq_urb) + { + // submit urb + if ((retval = usb_submit_urb (priv->irq_urb)) != 0) + dbg("gl_interrupt_read : submit interrupt read urb fail - %X...\n", retval); + else + dbg("gl_interrupt_read : submit interrupt read urb success....\n"); + } + + return 0; +} + +// check whether another side is connected +static int genelink_check_connect (struct usbnet *dev) +{ + dbg ("%s: assuming peer is connected", dev->net.name); + return 0; + + /* + // FIXME Uncomment this code after genelink_check_connect + // control hanshaking will be implemented + + int retval; + + dbg("genelink_check_connect...\n"); + + // issue a usb control write command to detect whether another side is connected + if ((retval = gl_control_write(dev, GENELINK_CONNECT_WRITE, 0)) != 0) { + dbg ("%s: genelink_check_connect control write fail - %X\n", dev->net.name, retval); + return retval; + } else { + dbg("%s: genelink_check_conntect control write success\n",dev->net.name); + + // issue a usb interrupt read command to ack another side + + if ((retval = gl_interrupt_read(dev)) != 0) { + dbg("%s: genelink_check_connect interrupt read fail - %X\n", dev->net.name, retval); + return retval; + } else { + dbg("%s: genelink_check_connect interrupt read success\n", dev->net.name); + } + + } + */ + + return 0; +} + +// allocate and initialize the private data for genelink +static int genelink_init_priv(struct usbnet *dev) +{ + struct gl_priv *priv; + + // allocate the private data structure + if ((priv = kmalloc (sizeof *priv, GFP_KERNEL)) == 0) + { + dbg("%s: cannot allocate private data per device", dev->net.name); + return -ENOMEM; + } + + // allocate irq urb + if ((priv->irq_urb = usb_alloc_urb(0)) == 0) + { + dbg("%s: cannot allocate private irq urb per device", dev->net.name); + kfree(priv); + return -ENOMEM; + } + + // fill irq urb + FILL_INT_URB(priv->irq_urb, dev->udev, usb_rcvintpipe(dev->udev, GENELINK_INTERRUPT_PIPE), + priv->irq_buf, INTERRUPT_BUFSIZE, gl_interrupt_complete, 0, GENELINK_INTERRUPT_INTERVAL); + + // set private data pointer + dev->priv_data = priv; + + return 0; +} + +// release the private data +static int genelink_release_priv(struct usbnet *dev) +{ + struct gl_priv *priv = dev->priv_data; + + if (!priv) + return 0; + + // cancel irq urb first + usb_unlink_urb(priv->irq_urb); + + // free irq urb + usb_free_urb(priv->irq_urb); + + // free the private data structure + kfree(priv); + + return 0; +} + +// reset the device status +static int genelink_reset (struct usbnet *dev) +{ + // we don't need to reset, just return 0 + return 0; +} + +static const struct driver_info genelink_info = { + description: "Genesys GeneLink", + flags: FLAG_GENELINK, + reset: genelink_reset, + check_connect: genelink_check_connect, + initialize_private: genelink_init_priv, + release_private: genelink_release_priv, + + in: 1, out: 2, // direction distinguishes these + epsize: 64, +}; + +#endif /* CONFIG_USB_GENELINK */ + + + /*------------------------------------------------------------------------- * * Network Device Driver (peer link to "Host Device", from USB host) @@ -782,6 +1003,14 @@ size = (dev->driver_info->flags & FLAG_FRAMING) ? FRAMED_SIZE (dev->net.mtu) : (sizeof (struct ethhdr) + dev->net.mtu); + +#ifdef CONFIG_USB_GENELINK + + if (dev->driver_info->flags & FLAG_GENELINK) + size = GL_RCV_BUF_SIZE; + +#endif + if ((skb = alloc_skb (size, flags)) == 0) { dbg ("no rx skb"); tasklet_schedule (&dev->bh); @@ -894,9 +1123,123 @@ // the extra byte we may have appended } +#ifdef CONFIG_USB_GENELINK + + if (dev->driver_info->flags & FLAG_GENELINK) + { + struct gl_header *header; + struct gl_packet *current_packet; + struct sk_buff *gl_skb; + int status; + u32 size; + + header = (struct gl_header *)skb->data; + + // get the packet count of the received skb + le32_to_cpus(&header->packet_count); + +// dbg("receive packet count = %d", header->packet_count); + + if ((header->packet_count > GL_MAX_TRANSMIT_PACKETS) || + (header->packet_count < 0)) + { + dbg("genelink : illegal received packet count %d", header->packet_count); + goto error; + } + + // set the current packet pointer to the first packet + current_packet = &(header->packets); + + // decrement the length for the packet count size 4 bytes + skb_pull(skb, 4); + + while (header->packet_count > 1) + { + // get the packet length + size = current_packet->packet_length; + + // this may be a broken packet + if (size > GL_MAX_PACKET_LEN) + { + dbg("genelink : illegal received packet length %d, maybe a broken packet", size); + goto error; + } + + // allocate the skb for the individual packet + gl_skb = alloc_skb (size, in_interrupt () ? GFP_ATOMIC : GFP_KERNEL); + + if (gl_skb == 0) + goto error; + + // copy the packet data to the new skb + memcpy(gl_skb->data,current_packet->packet_data,size); + + // set skb data size + gl_skb->len = size; +/* + dbg("rx_process one gl_packet, size = %d....", size); + + dbg("%02X %02X %02X %02X %02X %02X", + (u8)gl_skb->data[0],(u8)gl_skb->data[1],(u8)gl_skb->data[2], + (u8)gl_skb->data[3],(u8)gl_skb->data[4],(u8)gl_skb->data[5]); + dbg("%02X %02X %02X %02X %02X %02X\n", + (u8)gl_skb->data[6],(u8)gl_skb->data[7],(u8)gl_skb->data[8], + (u8)gl_skb->data[9],(u8)gl_skb->data[10],(u8)gl_skb->data[11]); +*/ + gl_skb->dev = &dev->net; + + // determine the packet's protocol ID + gl_skb->protocol = eth_type_trans(gl_skb, &dev->net); + + // update the status + dev->stats.rx_packets++; + dev->stats.rx_bytes += size; + + // notify os of the received packet + status = netif_rx (gl_skb); + +// dev_kfree_skb (gl_skb); // just for debug purpose, delete this line for normal operation + + // advance to the next packet + current_packet = (struct gl_packet *)(current_packet->packet_data + size); + + header->packet_count --; + + // shift the data pointer to the next gl_packet + skb_pull(skb, size + 4); + } // while (header->packet_count > 1) + + // skip the packet length field 4 bytes + skb_pull(skb, 4); + } + +#endif + if (skb->len) { int status; +#ifdef CONFIG_USB_GENELINK + +/* + dbg("rx_process one packet, size = %d", skb->len); + + dbg("%02X %02X %02X %02X %02X %02X", + (u8)skb->data[0],(u8)skb->data[1],(u8)skb->data[2], + (u8)skb->data[3],(u8)skb->data[4],(u8)skb->data[5]); + dbg("%02X %02X %02X %02X %02X %02X\n", + (u8)skb->data[6],(u8)skb->data[7],(u8)skb->data[8], + (u8)skb->data[9],(u8)skb->data[10],(u8)skb->data[11]); +*/ + + if ((dev->driver_info->flags & FLAG_GENELINK) && + (skb->len > GL_MAX_PACKET_LEN)) + { + dbg("genelink : illegal received packet length %d, maybe a broken packet", skb->len); + goto error; + } + +#endif + // FIXME: eth_copy_and_csum "small" packets to new SKB (small < ~200 bytes) ? skb->dev = &dev->net; @@ -1049,6 +1392,13 @@ dev->wait = 0; remove_wait_queue (&unlink_wakeup, &wait); +#ifdef CONFIG_USB_GENELINK + + if (dev->driver_info->release_private) + dev->driver_info->release_private(dev); + +#endif + mutex_unlock (&dev->mutex); return 0; } @@ -1076,6 +1426,19 @@ goto done; } +#ifdef CONFIG_USB_GENELINK + + // initialize the private resources + if (info->initialize_private) + { + if ((retval = info->initialize_private(dev)) < 0) + { + dbg("%s: open initialize private fail", dev->net.name); + goto done; + } + } +#endif + // insist peer be connected if (info->check_connect && (retval = info->check_connect (dev)) < 0) { devdbg (dev, "can't open; %d", retval); @@ -1180,6 +1543,49 @@ /*-------------------------------------------------------------------------*/ +#ifdef CONFIG_USB_GENELINK + +static struct sk_buff *gl_build_skb (struct sk_buff *skb) +{ + struct sk_buff *skb2; + int padlen; + + int headroom = skb_headroom (skb); + int tailroom = skb_tailroom (skb); + +// dbg("headroom = %d, tailroom = %d", headroom, tailroom); + + padlen = ((skb->len + (4 + 4*1)) % 64) ? 0 : 1; + + if ((!skb_cloned (skb)) && ((headroom + tailroom) >= (padlen + (4 + 4*1)))) + { + if ((headroom < (4 + 4*1)) || (tailroom < padlen)) + { + skb->data = memmove (skb->head + (4 + 4*1), + skb->data, skb->len); + skb->tail = skb->data + skb->len; + } + skb2 = skb; + } else { + skb2 = skb_copy_expand (skb, (4 + 4*1) , padlen, in_interrupt () ? GFP_ATOMIC : GFP_KERNEL); + + if (!skb2) + { + dbg("genelink : skb_copy_expand fail"); + return 0; + } + + // free the original skb + dev_kfree_skb_any (skb); + } + + return skb2; +} + +#endif + +/*-------------------------------------------------------------------------*/ + static int usbnet_start_xmit (struct sk_buff *skb, struct net_device *net) { struct usbnet *dev = (struct usbnet *) net->priv; @@ -1204,6 +1610,16 @@ skb = skb2; } +#ifdef CONFIG_USB_GENELINK + + if ((info->flags & FLAG_GENELINK) && (skb = gl_build_skb(skb)) == 0) + { + dbg("can't build skb for genelink transmit"); + goto drop; + } + +#endif + if (!(urb = usb_alloc_urb (0))) { dbg ("no urb"); goto drop; @@ -1222,7 +1638,31 @@ if (!((skb->len + sizeof *trailer) & 0x01)) *skb_put (skb, 1) = PAD_BYTE; trailer = (struct nc_trailer *) skb_put (skb, sizeof *trailer); - } else if ((length % EP_SIZE (dev)) == 0) { + } + +#ifdef CONFIG_USB_GENELINK + + else if (info->flags & FLAG_GENELINK) { + u32 *packet_count, *packet_len; + + // attach the packet count to the header + packet_count = (u32 *)skb_push(skb, (4 + 4*1)); + packet_len = packet_count + 1; + + // set packet to 1 + *packet_count = 1; + + // set packet length + *packet_len = length; + + // add padding byte + if ((skb->len % EP_SIZE(dev)) == 0) + skb_put(skb, 1); + } + +#endif + + else if ((length % EP_SIZE (dev)) == 0) { if (skb_shared (skb)) { struct sk_buff *skb2; skb2 = skb_unshare (skb, flags); @@ -1408,10 +1848,19 @@ return 0; } - if (usb_set_interface (udev, ifnum, altnum) < 0) { - err ("set_interface failed"); - return 0; +#ifdef CONFIG_USB_GENELINK + // genelink device didn't support set interface command + // it need to issue set interface command for genelink device + if (!((prod->idProduct == 0x0502) && (prod->idVendor == 0x05e3))) + { +#endif + if (usb_set_interface (udev, ifnum, altnum) < 0) { + err ("set_interface failed"); + return 0; + } +#ifdef CONFIG_USB_GENELINK } +#endif // set up our own records if (!(dev = kmalloc (sizeof *dev, GFP_KERNEL))) { @@ -1484,11 +1933,6 @@ }, #endif - -// GeneSys GL620USB (www.genesyslogic.com.tw) -// (patch exists against an older driver version) - - #ifdef CONFIG_USB_LINUXDEV /* * for example, this can be a host side talk-to-PDA driver. @@ -1528,6 +1972,13 @@ }, #endif +#ifdef CONFIG_USB_GENELINK +{ + USB_DEVICE (0x05e3, 0x0502), // GL620USB/GL620USB-A + driver_info: (unsigned long) &genelink_info, +}, +#endif + { }, // END }; MODULE_DEVICE_TABLE (usb, products); @@ -1564,5 +2015,5 @@ module_exit (usbnet_exit); MODULE_AUTHOR ("David Brownell <dbrownell@users.sourceforge.net>"); -MODULE_DESCRIPTION ("USB Host-to-Host Link Drivers (Belkin, Linux, NetChip, Prolific, ...)"); +MODULE_DESCRIPTION ("USB Host-to-Host Link Drivers (Belkin, Linux, NetChip, Prolific, Genesys Logic, ...)"); MODULE_LICENSE("GPL"); --- linux/Documentation/Configure.help.orig Tue Sep 25 00:08:44 2001 +++ linux/Documentation/Configure.help Tue Sep 25 00:14:01 2001 @@ -11738,9 +11738,11 @@ CONFIG_USB_USBNET This driver supports network links over USB with USB "Network" or "data transfer" cables, often used to network laptops to PCs. - Such cables have chips from suppliers such as NetChip and Prolific. - Intelligent USB devices could also use this approach to provide - Internet access, using standard USB cabling. + Such cables have chips from suppliers such as NetChip, Prolific + and GeneSys (GeneLink). Intelligent USB devices could also use this + approach to provide Internet access, using standard USB cabling. + You can find these chips also on some motherboards with USB PC2PC + support. These links will have names like "usb0", "usb1", etc. They act like two-node Ethernets, so you can use 802.1d Ethernet Bridging - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/