diff options
Diffstat (limited to 'drivers/usb/net/net1080.c')
| -rw-r--r-- | drivers/usb/net/net1080.c | 615 |
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 19bf8dae70c9..000000000000 --- 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"); |