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Diffstat (limited to 'drivers/usb/net/net1080.c')
-rw-r--r--drivers/usb/net/net1080.c615
1 files changed, 0 insertions, 615 deletions
diff --git a/drivers/usb/net/net1080.c b/drivers/usb/net/net1080.c
deleted file mode 100644
index 19bf8dae70c..00000000000
--- a/drivers/usb/net/net1080.c
+++ /dev/null
@@ -1,615 +0,0 @@
-/*
- * Net1080 based USB host-to-host cables
- * Copyright (C) 2000-2005 by David Brownell
- *
- * 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/module.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 <asm/unaligned.h>
-
-#include "usbnet.h"
-
-
-/*
- * Netchip 1080 driver ... http://www.netchip.com
- * (Sept 2004: End-of-life announcement has been sent.)
- * Used in (some) LapLink cables
- */
-
-#define frame_errors data[1]
-
-/*
- * NetChip framing of ethernet packets, supporting additional error
- * checks for links that may drop bulk packets from inside messages.
- * Odd USB length == always short read for last usb packet.
- * - nc_header
- * - Ethernet header (14 bytes)
- * - payload
- * - (optional padding byte, if needed so length becomes odd)
- * - nc_trailer
- *
- * This framing is to be avoided for non-NetChip devices.
- */
-
-struct nc_header { // packed:
- __le16 hdr_len; // sizeof nc_header (LE, all)
- __le16 packet_len; // payload size (including ethhdr)
- __le16 packet_id; // detects dropped packets
-#define MIN_HEADER 6
-
- // all else is optional, and must start with:
- // __le16 vendorId; // from usb-if
- // __le16 productId;
-} __attribute__((__packed__));
-
-#define PAD_BYTE ((unsigned char)0xAC)
-
-struct nc_trailer {
- __le16 packet_id;
-} __attribute__((__packed__));
-
-// packets may use FLAG_FRAMING_NC and optional pad
-#define FRAMED_SIZE(mtu) (sizeof (struct nc_header) \
- + sizeof (struct ethhdr) \
- + (mtu) \
- + 1 \
- + sizeof (struct nc_trailer))
-
-#define MIN_FRAMED FRAMED_SIZE(0)
-
-/* packets _could_ be up to 64KB... */
-#define NC_MAX_PACKET 32767
-
-
-/*
- * Zero means no timeout; else, how long a 64 byte bulk packet may be queued
- * before the hardware drops it. If that's done, the driver will need to
- * frame network packets to guard against the dropped USB packets. The win32
- * driver sets this for both sides of the link.
- */
-#define NC_READ_TTL_MS ((u8)255) // ms
-
-/*
- * We ignore most registers and EEPROM contents.
- */
-#define REG_USBCTL ((u8)0x04)
-#define REG_TTL ((u8)0x10)
-#define REG_STATUS ((u8)0x11)
-
-/*
- * Vendor specific requests to read/write data
- */
-#define REQUEST_REGISTER ((u8)0x10)
-#define REQUEST_EEPROM ((u8)0x11)
-
-static int
-nc_vendor_read(struct usbnet *dev, u8 req, u8 regnum, u16 *retval_ptr)
-{
- int status = usb_control_msg(dev->udev,
- usb_rcvctrlpipe(dev->udev, 0),
- req,
- USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
- 0, regnum,
- retval_ptr, sizeof *retval_ptr,
- USB_CTRL_GET_TIMEOUT);
- if (status > 0)
- status = 0;
- if (!status)
- le16_to_cpus(retval_ptr);
- return status;
-}
-
-static inline int
-nc_register_read(struct usbnet *dev, u8 regnum, u16 *retval_ptr)
-{
- return nc_vendor_read(dev, REQUEST_REGISTER, regnum, retval_ptr);
-}
-
-// no retval ... can become async, usable in_interrupt()
-static void
-nc_vendor_write(struct usbnet *dev, u8 req, u8 regnum, u16 value)
-{
- usb_control_msg(dev->udev,
- usb_sndctrlpipe(dev->udev, 0),
- req,
- USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
- value, regnum,
- NULL, 0, // data is in setup packet
- USB_CTRL_SET_TIMEOUT);
-}
-
-static inline void
-nc_register_write(struct usbnet *dev, u8 regnum, u16 value)
-{
- nc_vendor_write(dev, REQUEST_REGISTER, regnum, value);
-}
-
-
-#if 0
-static void nc_dump_registers(struct usbnet *dev)
-{
- u8 reg;
- u16 *vp = kmalloc(sizeof (u16));
-
- if (!vp) {
- dbg("no memory?");
- return;
- }
-
- dbg("%s registers:", dev->net->name);
- for (reg = 0; reg < 0x20; reg++) {
- int retval;
-
- // reading some registers is trouble
- if (reg >= 0x08 && reg <= 0xf)
- continue;
- if (reg >= 0x12 && reg <= 0x1e)
- continue;
-
- retval = nc_register_read(dev, reg, vp);
- if (retval < 0)
- dbg("%s reg [0x%x] ==> error %d",
- dev->net->name, reg, retval);
- else
- dbg("%s reg [0x%x] = 0x%x",
- dev->net->name, reg, *vp);
- }
- kfree(vp);
-}
-#endif
-
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * Control register
- */
-
-#define USBCTL_WRITABLE_MASK 0x1f0f
-// bits 15-13 reserved, r/o
-#define USBCTL_ENABLE_LANG (1 << 12)
-#define USBCTL_ENABLE_MFGR (1 << 11)
-#define USBCTL_ENABLE_PROD (1 << 10)
-#define USBCTL_ENABLE_SERIAL (1 << 9)
-#define USBCTL_ENABLE_DEFAULTS (1 << 8)
-// bits 7-4 reserved, r/o
-#define USBCTL_FLUSH_OTHER (1 << 3)
-#define USBCTL_FLUSH_THIS (1 << 2)
-#define USBCTL_DISCONN_OTHER (1 << 1)
-#define USBCTL_DISCONN_THIS (1 << 0)
-
-static inline void nc_dump_usbctl(struct usbnet *dev, u16 usbctl)
-{
- if (!netif_msg_link(dev))
- return;
- devdbg(dev, "net1080 %s-%s usbctl 0x%x:%s%s%s%s%s;"
- " this%s%s;"
- " other%s%s; r/o 0x%x",
- dev->udev->bus->bus_name, dev->udev->devpath,
- usbctl,
- (usbctl & USBCTL_ENABLE_LANG) ? " lang" : "",
- (usbctl & USBCTL_ENABLE_MFGR) ? " mfgr" : "",
- (usbctl & USBCTL_ENABLE_PROD) ? " prod" : "",
- (usbctl & USBCTL_ENABLE_SERIAL) ? " serial" : "",
- (usbctl & USBCTL_ENABLE_DEFAULTS) ? " defaults" : "",
-
- (usbctl & USBCTL_FLUSH_OTHER) ? " FLUSH" : "",
- (usbctl & USBCTL_DISCONN_OTHER) ? " DIS" : "",
- (usbctl & USBCTL_FLUSH_THIS) ? " FLUSH" : "",
- (usbctl & USBCTL_DISCONN_THIS) ? " DIS" : "",
- usbctl & ~USBCTL_WRITABLE_MASK
- );
-}
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * Status register
- */
-
-#define STATUS_PORT_A (1 << 15)
-
-#define STATUS_CONN_OTHER (1 << 14)
-#define STATUS_SUSPEND_OTHER (1 << 13)
-#define STATUS_MAILBOX_OTHER (1 << 12)
-#define STATUS_PACKETS_OTHER(n) (((n) >> 8) & 0x03)
-
-#define STATUS_CONN_THIS (1 << 6)
-#define STATUS_SUSPEND_THIS (1 << 5)
-#define STATUS_MAILBOX_THIS (1 << 4)
-#define STATUS_PACKETS_THIS(n) (((n) >> 0) & 0x03)
-
-#define STATUS_UNSPEC_MASK 0x0c8c
-#define STATUS_NOISE_MASK ((u16)~(0x0303|STATUS_UNSPEC_MASK))
-
-
-static inline void nc_dump_status(struct usbnet *dev, u16 status)
-{
- if (!netif_msg_link(dev))
- return;
- devdbg(dev, "net1080 %s-%s status 0x%x:"
- " this (%c) PKT=%d%s%s%s;"
- " other PKT=%d%s%s%s; unspec 0x%x",
- dev->udev->bus->bus_name, dev->udev->devpath,
- status,
-
- // XXX the packet counts don't seem right
- // (1 at reset, not 0); maybe UNSPEC too
-
- (status & STATUS_PORT_A) ? 'A' : 'B',
- STATUS_PACKETS_THIS(status),
- (status & STATUS_CONN_THIS) ? " CON" : "",
- (status & STATUS_SUSPEND_THIS) ? " SUS" : "",
- (status & STATUS_MAILBOX_THIS) ? " MBOX" : "",
-
- STATUS_PACKETS_OTHER(status),
- (status & STATUS_CONN_OTHER) ? " CON" : "",
- (status & STATUS_SUSPEND_OTHER) ? " SUS" : "",
- (status & STATUS_MAILBOX_OTHER) ? " MBOX" : "",
-
- status & STATUS_UNSPEC_MASK
- );
-}
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * TTL register
- */
-
-#define TTL_THIS(ttl) (0x00ff & ttl)
-#define TTL_OTHER(ttl) (0x00ff & (ttl >> 8))
-#define MK_TTL(this,other) ((u16)(((other)<<8)|(0x00ff&(this))))
-
-static inline void nc_dump_ttl(struct usbnet *dev, u16 ttl)
-{
- if (netif_msg_link(dev))
- devdbg(dev, "net1080 %s-%s ttl 0x%x this = %d, other = %d",
- dev->udev->bus->bus_name, dev->udev->devpath,
- ttl, TTL_THIS(ttl), TTL_OTHER(ttl));
-}
-
-/*-------------------------------------------------------------------------*/
-
-static int net1080_reset(struct usbnet *dev)
-{
- u16 usbctl, status, ttl;
- u16 *vp = kmalloc(sizeof (u16), GFP_KERNEL);
- int retval;
-
- if (!vp)
- return -ENOMEM;
-
- // nc_dump_registers(dev);
-
- if ((retval = nc_register_read(dev, REG_STATUS, vp)) < 0) {
- dbg("can't read %s-%s status: %d",
- dev->udev->bus->bus_name, dev->udev->devpath, retval);
- goto done;
- }
- status = *vp;
- nc_dump_status(dev, status);
-
- if ((retval = nc_register_read(dev, REG_USBCTL, vp)) < 0) {
- dbg("can't read USBCTL, %d", retval);
- goto done;
- }
- usbctl = *vp;
- nc_dump_usbctl(dev, usbctl);
-
- nc_register_write(dev, REG_USBCTL,
- USBCTL_FLUSH_THIS | USBCTL_FLUSH_OTHER);
-
- if ((retval = nc_register_read(dev, REG_TTL, vp)) < 0) {
- dbg("can't read TTL, %d", retval);
- goto done;
- }
- ttl = *vp;
- // nc_dump_ttl(dev, ttl);
-
- nc_register_write(dev, REG_TTL,
- MK_TTL(NC_READ_TTL_MS, TTL_OTHER(ttl)) );
- dbg("%s: assigned TTL, %d ms", dev->net->name, NC_READ_TTL_MS);
-
- if (netif_msg_link(dev))
- devinfo(dev, "port %c, peer %sconnected",
- (status & STATUS_PORT_A) ? 'A' : 'B',
- (status & STATUS_CONN_OTHER) ? "" : "dis"
- );
- retval = 0;
-
-done:
- kfree(vp);
- return retval;
-}
-
-static int net1080_check_connect(struct usbnet *dev)
-{
- int retval;
- u16 status;
- u16 *vp = kmalloc(sizeof (u16), GFP_KERNEL);
-
- if (!vp)
- return -ENOMEM;
- retval = nc_register_read(dev, REG_STATUS, vp);
- status = *vp;
- kfree(vp);
- if (retval != 0) {
- dbg("%s net1080_check_conn read - %d", dev->net->name, retval);
- return retval;
- }
- if ((status & STATUS_CONN_OTHER) != STATUS_CONN_OTHER)
- return -ENOLINK;
- return 0;
-}
-
-static void nc_flush_complete(struct urb *urb)
-{
- kfree(urb->context);
- usb_free_urb(urb);
-}
-
-static void nc_ensure_sync(struct usbnet *dev)
-{
- dev->frame_errors++;
- if (dev->frame_errors > 5) {
- struct urb *urb;
- struct usb_ctrlrequest *req;
- int status;
-
- /* Send a flush */
- urb = usb_alloc_urb(0, GFP_ATOMIC);
- if (!urb)
- return;
-
- req = kmalloc(sizeof *req, GFP_ATOMIC);
- if (!req) {
- usb_free_urb(urb);
- return;
- }
-
- req->bRequestType = USB_DIR_OUT
- | USB_TYPE_VENDOR
- | USB_RECIP_DEVICE;
- req->bRequest = REQUEST_REGISTER;
- req->wValue = cpu_to_le16(USBCTL_FLUSH_THIS
- | USBCTL_FLUSH_OTHER);
- req->wIndex = cpu_to_le16(REG_USBCTL);
- req->wLength = cpu_to_le16(0);
-
- /* queue an async control request, we don't need
- * to do anything when it finishes except clean up.
- */
- usb_fill_control_urb(urb, dev->udev,
- usb_sndctrlpipe(dev->udev, 0),
- (unsigned char *) req,
- NULL, 0,
- nc_flush_complete, req);
- status = usb_submit_urb(urb, GFP_ATOMIC);
- if (status) {
- kfree(req);
- usb_free_urb(urb);
- return;
- }
-
- if (netif_msg_rx_err(dev))
- devdbg(dev, "flush net1080; too many framing errors");
- dev->frame_errors = 0;
- }
-}
-
-static int net1080_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
-{
- struct nc_header *header;
- struct nc_trailer *trailer;
- u16 hdr_len, packet_len;
-
- if (!(skb->len & 0x01)) {
-#ifdef DEBUG
- struct net_device *net = dev->net;
- dbg("rx framesize %d range %d..%d mtu %d", skb->len,
- net->hard_header_len, dev->hard_mtu, net->mtu);
-#endif
- dev->stats.rx_frame_errors++;
- nc_ensure_sync(dev);
- return 0;
- }
-
- header = (struct nc_header *) skb->data;
- hdr_len = le16_to_cpup(&header->hdr_len);
- packet_len = le16_to_cpup(&header->packet_len);
- if (FRAMED_SIZE(packet_len) > NC_MAX_PACKET) {
- dev->stats.rx_frame_errors++;
- dbg("packet too big, %d", packet_len);
- nc_ensure_sync(dev);
- return 0;
- } else if (hdr_len < MIN_HEADER) {
- dev->stats.rx_frame_errors++;
- dbg("header too short, %d", hdr_len);
- nc_ensure_sync(dev);
- return 0;
- } else if (hdr_len > MIN_HEADER) {
- // out of band data for us?
- dbg("header OOB, %d bytes", hdr_len - MIN_HEADER);
- nc_ensure_sync(dev);
- // switch (vendor/product ids) { ... }
- }
- skb_pull(skb, hdr_len);
-
- trailer = (struct nc_trailer *)
- (skb->data + skb->len - sizeof *trailer);
- skb_trim(skb, skb->len - sizeof *trailer);
-
- if ((packet_len & 0x01) == 0) {
- if (skb->data [packet_len] != PAD_BYTE) {
- dev->stats.rx_frame_errors++;
- dbg("bad pad");
- return 0;
- }
- skb_trim(skb, skb->len - 1);
- }
- if (skb->len != packet_len) {
- dev->stats.rx_frame_errors++;
- dbg("bad packet len %d (expected %d)",
- skb->len, packet_len);
- nc_ensure_sync(dev);
- return 0;
- }
- if (header->packet_id != get_unaligned(&trailer->packet_id)) {
- dev->stats.rx_fifo_errors++;
- dbg("(2+ dropped) rx packet_id mismatch 0x%x 0x%x",
- le16_to_cpu(header->packet_id),
- le16_to_cpu(trailer->packet_id));
- return 0;
- }
-#if 0
- devdbg(dev, "frame <rx h %d p %d id %d", header->hdr_len,
- header->packet_len, header->packet_id);
-#endif
- dev->frame_errors = 0;
- return 1;
-}
-
-static struct sk_buff *
-net1080_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
-{
- struct sk_buff *skb2;
- struct nc_header *header = NULL;
- struct nc_trailer *trailer = NULL;
- int padlen = sizeof (struct nc_trailer);
- int len = skb->len;
-
- if (!((len + padlen + sizeof (struct nc_header)) & 0x01))
- padlen++;
- if (!skb_cloned(skb)) {
- int headroom = skb_headroom(skb);
- int tailroom = skb_tailroom(skb);
-
- if (padlen <= tailroom &&
- sizeof(struct nc_header) <= headroom)
- /* There's enough head and tail room */
- goto encapsulate;
-
- if ((sizeof (struct nc_header) + padlen) <
- (headroom + tailroom)) {
- /* There's enough total room, so just readjust */
- skb->data = memmove(skb->head
- + sizeof (struct nc_header),
- skb->data, skb->len);
- skb_set_tail_pointer(skb, len);
- goto encapsulate;
- }
- }
-
- /* Create a new skb to use with the correct size */
- skb2 = skb_copy_expand(skb,
- sizeof (struct nc_header),
- padlen,
- flags);
- dev_kfree_skb_any(skb);
- if (!skb2)
- return skb2;
- skb = skb2;
-
-encapsulate:
- /* header first */
- header = (struct nc_header *) skb_push(skb, sizeof *header);
- header->hdr_len = cpu_to_le16(sizeof (*header));
- header->packet_len = cpu_to_le16(len);
- header->packet_id = cpu_to_le16((u16)dev->xid++);
-
- /* maybe pad; then trailer */
- if (!((skb->len + sizeof *trailer) & 0x01))
- *skb_put(skb, 1) = PAD_BYTE;
- trailer = (struct nc_trailer *) skb_put(skb, sizeof *trailer);
- put_unaligned(header->packet_id, &trailer->packet_id);
-#if 0
- devdbg(dev, "frame >tx h %d p %d id %d",
- header->hdr_len, header->packet_len,
- header->packet_id);
-#endif
- return skb;
-}
-
-static int net1080_bind(struct usbnet *dev, struct usb_interface *intf)
-{
- unsigned extra = sizeof (struct nc_header)
- + 1
- + sizeof (struct nc_trailer);
-
- dev->net->hard_header_len += extra;
- dev->rx_urb_size = dev->net->hard_header_len + dev->net->mtu;
- dev->hard_mtu = NC_MAX_PACKET;
- return usbnet_get_endpoints (dev, intf);
-}
-
-static const struct driver_info net1080_info = {
- .description = "NetChip TurboCONNECT",
- .flags = FLAG_FRAMING_NC,
- .bind = net1080_bind,
- .reset = net1080_reset,
- .check_connect = net1080_check_connect,
- .rx_fixup = net1080_rx_fixup,
- .tx_fixup = net1080_tx_fixup,
-};
-
-static const struct usb_device_id products [] = {
-{
- USB_DEVICE(0x0525, 0x1080), // NetChip ref design
- .driver_info = (unsigned long) &net1080_info,
-}, {
- USB_DEVICE(0x06D0, 0x0622), // Laplink Gold
- .driver_info = (unsigned long) &net1080_info,
-},
- { }, // END
-};
-MODULE_DEVICE_TABLE(usb, products);
-
-static struct usb_driver net1080_driver = {
- .name = "net1080",
- .id_table = products,
- .probe = usbnet_probe,
- .disconnect = usbnet_disconnect,
- .suspend = usbnet_suspend,
- .resume = usbnet_resume,
-};
-
-static int __init net1080_init(void)
-{
- return usb_register(&net1080_driver);
-}
-module_init(net1080_init);
-
-static void __exit net1080_exit(void)
-{
- usb_deregister(&net1080_driver);
-}
-module_exit(net1080_exit);
-
-MODULE_AUTHOR("David Brownell");
-MODULE_DESCRIPTION("NetChip 1080 based USB Host-to-Host Links");
-MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-28 22:29:44 +0000