diff options
Diffstat (limited to 'drivers/usb/net/gl620a.c')
| -rw-r--r-- | drivers/usb/net/gl620a.c | 407 |
1 files changed, 0 insertions, 407 deletions
diff --git a/drivers/usb/net/gl620a.c b/drivers/usb/net/gl620a.c deleted file mode 100644 index c0f263b202a..00000000000 --- a/drivers/usb/net/gl620a.c +++ /dev/null @@ -1,407 +0,0 @@ -/* - * GeneSys GL620USB-A based links - * Copyright (C) 2001 by Jiun-Jie Huang <huangjj@genesyslogic.com.tw> - * Copyright (C) 2001 by Stanislav Brabec <utx@penguin.cz> - * - * 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 - */ - -// #define DEBUG // error path messages, extra info -// #define VERBOSE // more; success messages - -#include <linux/config.h> -#ifdef CONFIG_USB_DEBUG -# define DEBUG -#endif -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/init.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/ethtool.h> -#include <linux/workqueue.h> -#include <linux/mii.h> -#include <linux/usb.h> - -#include "usbnet.h" - - -/* - * GeneSys GL620USB-A (www.genesyslogic.com.tw) - * - * ... should partially interop with the Win32 driver for this hardware. - * The GeneSys docs imply there's some NDIS issue motivating this framing. - * - * Some info from GeneSys: - * - GL620USB-A is full duplex; GL620USB is only half duplex for bulk. - * (Some cables, like the BAFO-100c, use the half duplex version.) - * - For the full duplex model, the low bit of the version code says - * which side is which ("left/right"). - * - For the half duplex type, a control/interrupt handshake settles - * the transfer direction. (That's disabled here, partially coded.) - * A control URB would block until other side writes an interrupt. - * - * Original code from Jiun-Jie Huang <huangjj@genesyslogic.com.tw> - * and merged into "usbnet" by Stanislav Brabec <utx@penguin.cz>. - */ - -// 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_packet { - u32 packet_length; - char packet_data [1]; -}; - -struct gl_header { - u32 packet_count; - struct gl_packet packets; -}; - -#ifdef GENELINK_ACK - -// FIXME: this code is incomplete, not debugged; it doesn't -// handle interrupts correctly; it should use the generic -// status IRQ code (which didn't exist back in 2001). - -struct gl_priv { - struct urb *irq_urb; - char irq_buf [INTERRUPT_BUFSIZE]; -}; - -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 - USB_CTRL_SET_TIMEOUT); - return retval; -} - -static void gl_interrupt_complete(struct urb *urb, struct pt_regs *regs) -{ - int status = urb->status; - - switch (status) { - case 0: - /* success */ - break; - case -ECONNRESET: - case -ENOENT: - case -ESHUTDOWN: - /* this urb is terminated, clean up */ - dbg("%s - urb shutting down with status: %d", - __FUNCTION__, status); - return; - default: - dbg("%s - nonzero urb status received: %d", - __FUNCTION__, urb->status); - } - - status = usb_submit_urb(urb, GFP_ATOMIC); - if (status) - err("%s - usb_submit_urb failed with result %d", - __FUNCTION__, status); -} - -static 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, GFP_KERNEL)) != 0) - dbg("gl_interrupt_read: submit fail - %X...", retval); - else - dbg("gl_interrupt_read: submit success..."); - } - - return 0; -} - -// check whether another side is connected -static int genelink_check_connect(struct usbnet *dev) -{ - int retval; - - dbg("genelink_check_connect..."); - - // detect whether another side is connected - if ((retval = gl_control_write(dev, GENELINK_CONNECT_WRITE, 0)) != 0) { - dbg("%s: genelink_check_connect write fail - %X", - dev->net->name, retval); - return retval; - } - - // usb interrupt read to ack another side - if ((retval = gl_interrupt_read(dev)) != 0) { - dbg("%s: genelink_check_connect read fail - %X", - dev->net->name, retval); - return retval; - } - - dbg("%s: genelink_check_connect read success", dev->net->name); - return 0; -} - -// allocate and initialize the private data for genelink -static int genelink_init(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, GFP_KERNEL)) == 0) { - dbg("%s: cannot allocate private irq urb per device", - dev->net->name); - kfree(priv); - return -ENOMEM; - } - - // fill irq urb - usb_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_free(struct usbnet *dev) -{ - struct gl_priv *priv = dev->priv_data; - - if (!priv) - return 0; - -// FIXME: can't cancel here; it's synchronous, and -// should have happened earlier in any case (interrupt -// handling needs to be generic) - - // cancel irq urb first - usb_kill_urb(priv->irq_urb); - - // free irq urb - usb_free_urb(priv->irq_urb); - - // free the private data structure - kfree(priv); - - return 0; -} - -#endif - -static int genelink_rx_fixup(struct usbnet *dev, struct sk_buff *skb) -{ - struct gl_header *header; - struct gl_packet *packet; - struct sk_buff *gl_skb; - u32 size; - - header = (struct gl_header *) skb->data; - - // get the packet count of the received skb - le32_to_cpus(&header->packet_count); - if ((header->packet_count > GL_MAX_TRANSMIT_PACKETS) - || (header->packet_count < 0)) { - dbg("genelink: invalid received packet count %d", - header->packet_count); - return 0; - } - - // set the current packet pointer to the first packet - 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 = le32_to_cpu(packet->packet_length); - - // this may be a broken packet - if (size > GL_MAX_PACKET_LEN) { - dbg("genelink: invalid rx length %d", size); - return 0; - } - - // allocate the skb for the individual packet - gl_skb = alloc_skb(size, GFP_ATOMIC); - if (gl_skb) { - - // copy the packet data to the new skb - memcpy(skb_put(gl_skb, size), - packet->packet_data, size); - usbnet_skb_return(dev, gl_skb); - } - - // advance to the next packet - packet = (struct gl_packet *) - &packet->packet_data [size]; - header->packet_count--; - - // shift the data pointer to the next gl_packet - skb_pull(skb, size + 4); - } - - // skip the packet length field 4 bytes - skb_pull(skb, 4); - - if (skb->len > GL_MAX_PACKET_LEN) { - dbg("genelink: invalid rx length %d", skb->len); - return 0; - } - return 1; -} - -static struct sk_buff * -genelink_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) -{ - int padlen; - int length = skb->len; - int headroom = skb_headroom(skb); - int tailroom = skb_tailroom(skb); - u32 *packet_count; - u32 *packet_len; - - // FIXME: magic numbers, bleech - 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; - } - } else { - struct sk_buff *skb2; - skb2 = skb_copy_expand(skb, (4 + 4*1) , padlen, flags); - dev_kfree_skb_any(skb); - skb = skb2; - if (!skb) - return NULL; - } - - // attach the packet count to the header - packet_count = (u32 *) skb_push(skb, (4 + 4*1)); - packet_len = packet_count + 1; - - *packet_count = cpu_to_le32(1); - *packet_len = cpu_to_le32(length); - - // add padding byte - if ((skb->len % dev->maxpacket) == 0) - skb_put(skb, 1); - - return skb; -} - -static int genelink_bind(struct usbnet *dev, struct usb_interface *intf) -{ - dev->hard_mtu = GL_RCV_BUF_SIZE; - dev->net->hard_header_len += 4; - dev->in = usb_rcvbulkpipe(dev->udev, dev->driver_info->in); - dev->out = usb_sndbulkpipe(dev->udev, dev->driver_info->out); - return 0; -} - -static const struct driver_info genelink_info = { - .description = "Genesys GeneLink", - .flags = FLAG_FRAMING_GL | FLAG_NO_SETINT, - .bind = genelink_bind, - .rx_fixup = genelink_rx_fixup, - .tx_fixup = genelink_tx_fixup, - - .in = 1, .out = 2, - -#ifdef GENELINK_ACK - .check_connect =genelink_check_connect, -#endif -}; - -static const struct usb_device_id products [] = { - -{ - USB_DEVICE(0x05e3, 0x0502), // GL620USB-A - .driver_info = (unsigned long) &genelink_info, -}, - /* NOT: USB_DEVICE(0x05e3, 0x0501), // GL620USB - * that's half duplex, not currently supported - */ - { }, // END -}; -MODULE_DEVICE_TABLE(usb, products); - -static struct usb_driver gl620a_driver = { - .owner = THIS_MODULE, - .name = "gl620a", - .id_table = products, - .probe = usbnet_probe, - .disconnect = usbnet_disconnect, - .suspend = usbnet_suspend, - .resume = usbnet_resume, -}; - -static int __init usbnet_init(void) -{ - return usb_register(&gl620a_driver); -} -module_init(usbnet_init); - -static void __exit usbnet_exit(void) -{ - usb_deregister(&gl620a_driver); -} -module_exit(usbnet_exit); - -MODULE_AUTHOR("Jiun-Jie Huang"); -MODULE_DESCRIPTION("GL620-USB-A Host-to-Host Link cables"); -MODULE_LICENSE("GPL"); - |