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kernel / pub / scm / linux / kernel / git / wtarreau / linux-2.4 / 3030b4837f6d4da3ce04eb5d3c3be4550bf82e8f / . / drivers / usb / usbnet.c
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/*
* USB Host-to-Host Links
* Copyright (C) 2000-2002 by David Brownell <dbrownell@users.sourceforge.net>
* Copyright (C) 2002 Pavel Machek <pavel@ucw.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
*/
/*
* This is used for "USB networking", connecting USB hosts as peers.
*
* It can be used with USB "network cables", for IP-over-USB communications;
* Ethernet speeds without the Ethernet. USB devices (including some PDAs)
* can support such links directly, replacing device-specific protocols
* with Internet standard ones.
*
* The links can be bridged using the Ethernet bridging (net/bridge)
* support as appropriate. Devices currently supported include:
*
* - AnchorChip 2720
* - Belkin, eTEK (interops with Win32 drivers)
* - EPSON USB clients
* - GeneSys GL620USB-A
* - NetChip 1080 (interoperates with NetChip Win32 drivers)
* - Prolific PL-2301/2302 (replaces "plusb" driver)
* - PXA-250 or SA-1100 Linux PDAs like iPAQ, Yopy, and Zaurus
*
* USB devices can implement their side of this protocol at the cost
* of two bulk endpoints; it's not restricted to "cable" applications.
* See the SA1110, Zaurus, or EPSON device/client support in this driver;
* slave/target drivers such as "usb-eth" (on most SA-1100 PDAs) are
* used inside USB slave/target devices.
*
*
* Status:
*
* - AN2720 ... not widely available, but reportedly works well
*
* - Belkin/eTEK ... no known issues
*
* - Both GeneSys and PL-230x use interrupt transfers for driver-to-driver
* handshaking; it'd be worth implementing those as "carrier detect".
* Prefer generic hooks, not minidriver-specific hacks.
*
* - For Netchip, should use keventd to poll via control requests to detect
* hardware level "carrier detect".
*
* - PL-230x ... the initialization protocol doesn't seem to match chip data
* sheets, sometimes it's not needed and sometimes it hangs. Prolific has
* not responded to repeated support/information requests.
*
* - SA-1100 PDAs ... the standard ARM Linux SA-1100 support works nicely,
* as found in www.handhelds.org and other kernels. The Sharp/Lineo
* kernels use different drivers, which also talk to this code.
*
* Interop with more Win32 drivers may be a good thing.
*
* Seems like reporting "peer connected" (carrier present) events may end
* up going through the netlink event system, not hotplug ... so new links
* would likely be handled with a link monitoring thread in some daemon.
*
* There are reports that bridging gives lower-than-usual throughput.
*
* Need smarter hotplug policy scripts ... ones that know how to arrange
* bridging with "brctl", and can handle static and dynamic ("pump") setups.
* Use those eventual "peer connected" events, and zeroconf.
*
*
* CHANGELOG:
*
* 13-sep-2000 experimental, new
* 10-oct-2000 usb_device_id table created.
* 28-oct-2000 misc fixes; mostly, discard more TTL-mangled rx packets.
* 01-nov-2000 usb_device_id table and probing api update by
* Adam J. Richter <adam@yggdrasil.com>.
* 18-dec-2000 (db) tx watchdog, "net1080" renaming to "usbnet", device_info
* and prolific support, isolate net1080-specific bits, cleanup.
* fix unlink_urbs oops in D3 PM resume code path.
*
* 02-feb-2001 (db) fix tx skb sharing, packet length, match_flags, ...
* 08-feb-2001 stubbed in "linuxdev", maybe the SA-1100 folk can use it;
* AnchorChips 2720 support (from spec) for testing;
* fix bit-ordering problem with ethernet multicast addr
* 19-feb-2001 Support for clearing halt conditions. SA1100 UDC support
* updates. Oleg Drokin (green@iXcelerator.com)
* 25-mar-2001 More SA-1100 updates, including workaround for ip problem
* expecting cleared skb->cb and framing change to match latest
* handhelds.org version (Oleg). Enable device IDs from the
* 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)
* 17-oct-2001 Handle "Advance USBNET" product, like Belkin/eTEK devices,
* from Ioannis Mavroukakis <i.mavroukakis@btinternet.com>;
* rx unlinks somehow weren't async; minor cleanup.
* 03-nov-2001 Merged GeneSys driver; original code from Jiun-Jie Huang
* <huangjj@genesyslogic.com.tw>, updated by Stanislav Brabec
* <utx@penguin.cz>. Made framing options (NetChip/GeneSys)
* tie mostly to (sub)driver info. Workaround some PL-2302
* chips that seem to reject SET_INTERFACE requests.
*
* 06-apr-2002 Added ethtool support, based on a patch from Brad Hards.
* Level of diagnostics is more configurable; they use device
* location (usb_device->devpath) instead of address (2.5).
* For tx_fixup, memflags can't be NOIO.
* 07-may-2002 Generalize/cleanup keventd support, handling rx stalls (mostly
* for USB 2.0 TTs) and memory shortages (potential) too. (db)
* Use "locally assigned" IEEE802 address space. (Brad Hards)
* 18-oct-2002 Support for Zaurus (Pavel Machek), related cleanup (db).
* 15-dec-2002 Partial sync with 2.5 code: cleanups and stubbed PXA-250
* support (db), fix for framing issues on Z, net1080, and
* gl620a (Toby Milne)
*
*-------------------------------------------------------------------------*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kmod.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/random.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/tqueue.h>
#include <asm/uaccess.h>
#include <asm/unaligned.h>
// #define DEBUG // error path messages, extra info
// #define VERBOSE // more; success messages
// #define REALLY_QUEUE
#if !defined (DEBUG) && defined (CONFIG_USB_DEBUG)
# define DEBUG
#endif
#include <linux/usb.h>
/* in 2.5 these standard usb ops take mem_flags */
#define ALLOC_URB(n,flags) usb_alloc_urb(n)
#define SUBMIT_URB(u,flags) usb_submit_urb(u)
/* and these got renamed (may move to usb.h) */
#define usb_get_dev usb_inc_dev_use
#define usb_put_dev usb_dec_dev_use
/* minidrivers _could_ be individually configured */
#define CONFIG_USB_AN2720
#define CONFIG_USB_AX8817X
#define CONFIG_USB_BELKIN
#define CONFIG_USB_EPSON2888
#define CONFIG_USB_GENESYS
#define CONFIG_USB_NET1080
#define CONFIG_USB_PL2301
#define CONFIG_USB_ARMLINUX
#define CONFIG_USB_ZAURUS
#define DRIVER_VERSION "18-Oct-2002"
/*-------------------------------------------------------------------------*/
/*
* Nineteen USB 1.1 max size bulk transactions per frame (ms), max.
* Several dozen bytes of IPv4 data can fit in two such transactions.
* One maximum size Ethernet packet takes twenty four of them.
* For high speed, each frame comfortably fits almost 36 max size
* Ethernet packets (so queues should be bigger).
*/
#ifdef REALLY_QUEUE
#define RX_QLEN 4
#define TX_QLEN 4
#else
#define RX_QLEN 1
#define TX_QLEN 1
#endif
// packets are always ethernet inside
// ... except they can be bigger (limit of 64K with NetChip framing)
#define MIN_PACKET sizeof(struct ethhdr)
#define MAX_PACKET 32768
// reawaken network queue this soon after stopping; else watchdog barks
#define TX_TIMEOUT_JIFFIES (5*HZ)
// for vendor-specific control operations
#define CONTROL_TIMEOUT_MS (500) /* msec */
#define CONTROL_TIMEOUT_JIFFIES ((CONTROL_TIMEOUT_MS * HZ)/1000)
// between wakeups
#define UNLINK_TIMEOUT_JIFFIES ((3 /*ms*/ * HZ)/1000)
/*-------------------------------------------------------------------------*/
// list of all devices we manage
static DECLARE_MUTEX (usbnet_mutex);
static LIST_HEAD (usbnet_list);
// randomly generated ethernet address
static u8 node_id [ETH_ALEN];
// state we keep for each device we handle
struct usbnet {
// housekeeping
struct usb_device *udev;
struct driver_info *driver_info;
struct semaphore mutex;
struct list_head dev_list;
wait_queue_head_t *wait;
// i/o info: pipes etc
unsigned in, out;
unsigned maxpacket;
//struct timer_list delay;
// protocol/interface state
struct net_device net;
struct net_device_stats stats;
int msg_level;
struct mii_if_info mii;
#ifdef CONFIG_USB_NET1080
u16 packet_id;
#endif
// various kinds of pending driver work
struct sk_buff_head rxq;
struct sk_buff_head txq;
struct sk_buff_head done;
struct tasklet_struct bh;
struct tq_struct kevent;
unsigned long flags;
# define EVENT_TX_HALT 0
# define EVENT_RX_HALT 1
# define EVENT_RX_MEMORY 2
};
// device-specific info used by the driver
struct driver_info {
char *description;
int flags;
#define FLAG_FRAMING_NC 0x0001 /* guard against device dropouts */
#define FLAG_FRAMING_GL 0x0002 /* genelink batches packets */
#define FLAG_FRAMING_Z 0x0004 /* zaurus adds a trailer */
#define FLAG_NO_SETINT 0x0010 /* device can't set_interface() */
#define FLAG_ETHER 0x0020 /* maybe use "eth%d" names */
/* init device ... can sleep, or cause probe() failure */
int (*bind)(struct usbnet *, struct usb_device *);
/* reset device ... can sleep */
int (*reset)(struct usbnet *);
/* see if peer is connected ... can sleep */
int (*check_connect)(struct usbnet *);
/* fixup rx packet (strip framing) */
int (*rx_fixup)(struct usbnet *dev, struct sk_buff *skb);
/* fixup tx packet (add framing) */
struct sk_buff *(*tx_fixup)(struct usbnet *dev,
struct sk_buff *skb, int flags);
// FIXME -- also an interrupt mechanism
// useful for at least PL2301/2302 and GL620USB-A
/* for new devices, use the descriptor-reading code instead */
int in; /* rx endpoint */
int out; /* tx endpoint */
int epsize;
unsigned long data; /* Misc driver specific data */
};
// we record the state for each of our queued skbs
enum skb_state {
illegal = 0,
tx_start, tx_done,
rx_start, rx_done, rx_cleanup
};
struct skb_data { // skb->cb is one of these
struct urb *urb;
struct usbnet *dev;
enum skb_state state;
size_t length;
};
static const char driver_name [] = "usbnet";
/* use ethtool to change the level for any given device */
static int msg_level = 1;
MODULE_PARM (msg_level, "i");
MODULE_PARM_DESC (msg_level, "Initial message level (default = 1)");
#define mutex_lock(x) down(x)
#define mutex_unlock(x) up(x)
#define RUN_CONTEXT (in_irq () ? "in_irq" \
: (in_interrupt () ? "in_interrupt" : "can sleep"))
static struct ethtool_ops usbnet_ethtool_ops;
/* mostly for PDA style devices, which are always present */
static int always_connected (struct usbnet *dev)
{
return 0;
}
/*-------------------------------------------------------------------------*/
/* handles CDC Ethernet and many other network "bulk data" interfaces */
static int
get_endpoints (struct usbnet *dev, struct usb_interface *intf)
{
int tmp;
struct usb_interface_descriptor *alt;
struct usb_endpoint_descriptor *in, *out;
for (tmp = 0; tmp < intf->max_altsetting; tmp++) {
unsigned ep;
in = out = 0;
alt = intf->altsetting + tmp;
/* take the first altsetting with in-bulk + out-bulk;
* ignore other endpoints and altsetttings.
*/
for (ep = 0; ep < alt->bNumEndpoints; ep++) {
struct usb_endpoint_descriptor *e;
e = alt->endpoint + ep;
if (e->bmAttributes != USB_ENDPOINT_XFER_BULK)
continue;
if (e->bEndpointAddress & USB_DIR_IN) {
if (!in)
in = e;
} else {
if (!out)
out = e;
}
if (in && out)
goto found;
}
}
return -EINVAL;
found:
if (alt->bAlternateSetting != 0
|| !(dev->driver_info->flags & FLAG_NO_SETINT)) {
tmp = usb_set_interface (dev->udev, alt->bInterfaceNumber,
alt->bAlternateSetting);
if (tmp < 0)
return tmp;
}
dev->in = usb_rcvbulkpipe (dev->udev,
in->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
dev->out = usb_sndbulkpipe (dev->udev,
out->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1);
return 0;
}
/*-------------------------------------------------------------------------*/
#ifdef DEBUG
#define devdbg(usbnet, fmt, arg...) \
printk(KERN_DEBUG "%s: " fmt "\n" , (usbnet)->net.name , ## arg)
#else
#define devdbg(usbnet, fmt, arg...) do {} while(0)
#endif
#define devinfo(usbnet, fmt, arg...) \
do { if ((usbnet)->msg_level >= 1) \
printk(KERN_INFO "%s: " fmt "\n" , (usbnet)->net.name , ## arg); \
} while (0)
#ifdef CONFIG_USB_AN2720
/*-------------------------------------------------------------------------
*
* AnchorChips 2720 driver ... http://www.cypress.com
*
* This doesn't seem to have a way to detect whether the peer is
* connected, or need any reset handshaking. It's got pretty big
* internal buffers (handles most of a frame's worth of data).
* Chip data sheets don't describe any vendor control messages.
*
*-------------------------------------------------------------------------*/
static const struct driver_info an2720_info = {
.description = "AnchorChips/Cypress 2720",
// no reset available!
// no check_connect available!
.in = 2, .out = 2, // direction distinguishes these
.epsize =64,
};
#endif /* CONFIG_USB_AN2720 */
#ifdef CONFIG_USB_AX8817X
/* ASIX AX8817X based USB 2.0 Ethernet Devices */
#define HAVE_HARDWARE
#define NEED_MII
#include <linux/crc32.h>
#define AX_CMD_SET_SW_MII 0x06
#define AX_CMD_READ_MII_REG 0x07
#define AX_CMD_WRITE_MII_REG 0x08
#define AX_CMD_SET_HW_MII 0x0a
#define AX_CMD_WRITE_RX_CTL 0x10
#define AX_CMD_READ_IPG012 0x11
#define AX_CMD_WRITE_IPG0 0x12
#define AX_CMD_WRITE_IPG1 0x13
#define AX_CMD_WRITE_IPG2 0x14
#define AX_CMD_WRITE_MULTI_FILTER 0x16
#define AX_CMD_READ_NODE_ID 0x17
#define AX_CMD_READ_PHY_ID 0x19
#define AX_CMD_WRITE_MEDIUM_MODE 0x1b
#define AX_CMD_WRITE_GPIOS 0x1f
#define AX_MCAST_FILTER_SIZE 8
#define AX_MAX_MCAST 64
static int ax8817x_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
u16 size, void *data)
{
return usb_control_msg(
dev->udev,
usb_rcvctrlpipe(dev->udev, 0),
cmd,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
value,
index,
data,
size,
CONTROL_TIMEOUT_JIFFIES);
}
static int ax8817x_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
u16 size, void *data)
{
return usb_control_msg(
dev->udev,
usb_sndctrlpipe(dev->udev, 0),
cmd,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
value,
index,
data,
size,
CONTROL_TIMEOUT_JIFFIES);
}
static void ax8817x_async_cmd_callback(struct urb *urb)
{
struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
if (urb->status < 0)
printk(KERN_DEBUG "ax8817x_async_cmd_callback() failed with %d",
urb->status);
kfree(req);
usb_free_urb(urb);
}
static void ax8817x_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
u16 size, void *data)
{
struct usb_ctrlrequest *req;
int status;
struct urb *urb;
if ((urb = ALLOC_URB(0, GFP_ATOMIC)) == NULL) {
devdbg(dev, "Error allocating URB in write_cmd_async!");
return;
}
if ((req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC)) == NULL) {
devdbg(dev, "Failed to allocate memory for control request");
usb_free_urb(urb);
return;
}
req->bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
req->bRequest = cmd;
req->wValue = cpu_to_le16(value);
req->wIndex = cpu_to_le16(index);
req->wLength = cpu_to_le16(size);
usb_fill_control_urb(urb, dev->udev,
usb_sndctrlpipe(dev->udev, 0),
(void *)req, data, size,
ax8817x_async_cmd_callback, req);
if((status = SUBMIT_URB(urb, GFP_ATOMIC)) < 0)
devdbg(dev, "Error submitting the control message: status=%d", status);
}
static void ax8817x_set_multicast(struct net_device *net)
{
struct usbnet *dev = (struct usbnet *) net->priv;
u8 rx_ctl = 0x8c;
if (net->flags & IFF_PROMISC) {
rx_ctl |= 0x01;
} else if (net->flags & IFF_ALLMULTI
|| net->mc_count > AX_MAX_MCAST) {
rx_ctl |= 0x02;
} else if (net->mc_count == 0) {
/* just broadcast and directed */
} else {
struct dev_mc_list *mc_list = net->mc_list;
u8 *multi_filter;
u32 crc_bits;
int i;
multi_filter = kmalloc(AX_MCAST_FILTER_SIZE, GFP_ATOMIC);
if (multi_filter == NULL) {
/* Oops, couldn't allocate a buffer for setting the multicast
filter. Try all multi mode. */
rx_ctl |= 0x02;
} else {
memset(multi_filter, 0, AX_MCAST_FILTER_SIZE);
/* Build the multicast hash filter. */
for (i = 0; i < net->mc_count; i++) {
crc_bits =
ether_crc(ETH_ALEN,
mc_list->dmi_addr) >> 26;
multi_filter[crc_bits >> 3] |=
1 << (crc_bits & 7);
mc_list = mc_list->next;
}
ax8817x_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0,
AX_MCAST_FILTER_SIZE, multi_filter);
rx_ctl |= 0x10;
}
}
ax8817x_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
}
static int ax8817x_mdio_read(struct net_device *netdev, int phy_id, int loc)
{
struct usbnet *dev = netdev->priv;
u16 res;
u8 buf[4];
ax8817x_write_cmd(dev, AX_CMD_SET_SW_MII, 0, 0, 0, &buf);
ax8817x_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id, (__u16)loc, 2, (u16 *)&res);
ax8817x_write_cmd(dev, AX_CMD_SET_HW_MII, 0, 0, 0, &buf);
return res & 0xffff;
}
static void ax8817x_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
{
struct usbnet *dev = netdev->priv;
u16 res = val;
u8 buf[4];
ax8817x_write_cmd(dev, AX_CMD_SET_SW_MII, 0, 0, 0, &buf);
ax8817x_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, (u16 *)&res);
ax8817x_write_cmd(dev, AX_CMD_SET_HW_MII, 0, 0, 0, &buf);
}
static int ax8817x_bind(struct usbnet *dev, struct usb_device *intf)
{
int ret;
u8 buf[6];
u16 *buf16 = (u16 *) buf;
int i;
unsigned long gpio_bits = dev->driver_info->data;
dev->in = usb_rcvbulkpipe(dev->udev, 3);
dev->out = usb_sndbulkpipe(dev->udev, 2);
/* Toggle the GPIOs in a manufacturer/model specific way */
for (i = 2; i >= 0; i--) {
if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_GPIOS,
(gpio_bits >> (i * 8)) & 0xff, 0, 0,
buf)) < 0)
return ret;
wait_ms(5);
}
if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_RX_CTL, 0x80, 0, 0, buf)) < 0) {
dbg("send AX_CMD_WRITE_RX_CTL failed: %d", ret);
return ret;
}
/* Get the MAC address */
memset(buf, 0, ETH_ALEN);
if ((ret = ax8817x_read_cmd(dev, AX_CMD_READ_NODE_ID, 0, 0, 6, buf)) < 0) {
dbg("read AX_CMD_READ_NODE_ID failed: %d", ret);
return ret;
}
memcpy(dev->net.dev_addr, buf, ETH_ALEN);
/* Get IPG values */
if ((ret = ax8817x_read_cmd(dev, AX_CMD_READ_IPG012, 0, 0, 3, buf)) < 0) {
dbg("Error reading IPG values: %d", ret);
return ret;
}
for(i = 0;i < 3;i++) {
ax8817x_write_cmd(dev, AX_CMD_WRITE_IPG0 + i, 0, 0, 1, &buf[i]);
}
/* Get the PHY id */
if ((ret = ax8817x_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf)) < 0) {
dbg("error on read AX_CMD_READ_PHY_ID: %02x", ret);
return ret;
} else if (ret < 2) {
/* this should always return 2 bytes */
dbg("AX_CMD_READ_PHY_ID returned less than 2 bytes: ret=%02x", ret);
return -EIO;
}
/* Initialize MII structure */
dev->mii.dev = &dev->net;
dev->mii.mdio_read = ax8817x_mdio_read;
dev->mii.mdio_write = ax8817x_mdio_write;
dev->mii.phy_id_mask = 0x3f;
dev->mii.reg_num_mask = 0x1f;
dev->mii.phy_id = buf[1];
if ((ret = ax8817x_write_cmd(dev, AX_CMD_SET_SW_MII, 0, 0, 0, &buf)) < 0) {
dbg("Failed to go to software MII mode: %02x", ret);
return ret;
}
*buf16 = cpu_to_le16(BMCR_RESET);
if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_MII_REG,
dev->mii.phy_id, MII_BMCR, 2, buf16)) < 0) {
dbg("Failed to write MII reg - MII_BMCR: %02x", ret);
return ret;
}
/* Advertise that we can do full-duplex pause */
*buf16 = cpu_to_le16(ADVERTISE_ALL | ADVERTISE_CSMA | 0x0400);
if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_MII_REG,
dev->mii.phy_id, MII_ADVERTISE,
2, buf16)) < 0) {
dbg("Failed to write MII_REG advertisement: %02x", ret);
return ret;
}
*buf16 = cpu_to_le16(BMCR_ANENABLE | BMCR_ANRESTART);
if ((ret = ax8817x_write_cmd(dev, AX_CMD_WRITE_MII_REG,
dev->mii.phy_id, MII_BMCR,
2, buf16)) < 0) {
dbg("Failed to write MII reg autonegotiate: %02x", ret);
return ret;
}
if ((ret = ax8817x_write_cmd(dev, AX_CMD_SET_HW_MII, 0, 0, 0, &buf)) < 0) {
dbg("Failed to set hardware MII: %02x", ret);
return ret;
}
dev->net.set_multicast_list = ax8817x_set_multicast;
return 0;
}
static const struct driver_info ax8817x_info = {
.description = "ASIX AX8817x USB 2.0 Ethernet",
.bind = ax8817x_bind,
.flags = FLAG_ETHER,
.data = 0x00130103,
};
static const struct driver_info dlink_dub_e100_info = {
.description = "DLink DUB-E100 USB Ethernet",
.bind = ax8817x_bind,
.flags = FLAG_ETHER,
.data = 0x009f9d9f,
};
static const struct driver_info netgear_fa120_info = {
.description = "Netgear FA-120 USB Ethernet",
.bind = ax8817x_bind,
.flags = FLAG_ETHER,
.data = 0x00130103,
};
static const struct driver_info hawking_uf200_info = {
.description = "Hawking UF200 USB Ethernet",
.bind = ax8817x_bind,
.flags = FLAG_ETHER,
.data = 0x001f1d1f,
};
#endif /* CONFIG_USB_AX8817X */
#ifdef CONFIG_USB_BELKIN
/*-------------------------------------------------------------------------
*
* Belkin F5U104 ... two NetChip 2280 devices + Atmel microcontroller
*
* ... also two eTEK designs, including one sold as "Advance USBNET"
*
*-------------------------------------------------------------------------*/
static const struct driver_info belkin_info = {
.description = "Belkin, eTEK, or compatible",
};
#endif /* CONFIG_USB_BELKIN */
#ifdef CONFIG_USB_EPSON2888
/*-------------------------------------------------------------------------
*
* EPSON USB clients
*
* This is the same idea as Linux PDAs (below) except the firmware in the
* device might not be Tux-powered. Epson provides reference firmware that
* implements this interface. Product developers can reuse or modify that
* code, such as by using their own product and vendor codes.
*
*-------------------------------------------------------------------------*/
static const struct driver_info epson2888_info = {
.description = "Epson USB Device",
.check_connect = always_connected,
.in = 4, .out = 3,
.epsize = 64,
};
#endif /* CONFIG_USB_EPSON2888 */
#ifdef CONFIG_USB_GENESYS
/*-------------------------------------------------------------------------
*
* 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.
*
*-------------------------------------------------------------------------*/
// 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 GENLINK_ACK
// FIXME: this code is incomplete, not debugged; it doesn't
// handle interrupts correctly. interrupts should be generic
// code like all other device I/O, anyway.
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
CONTROL_TIMEOUT_JIFFIES);
return retval;
}
static void gl_interrupt_complete (struct urb *urb)
{
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);
}
// NOTE: 2.4 still has automagic resubmit, so this would be
// wrong ... but this code has never worked, is always disabled.
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 = 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 = 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_unlink_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;
int status;
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: illegal 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 = packet->packet_length;
// this may be a broken packet
if (size > GL_MAX_PACKET_LEN) {
dbg ("genelink: illegal 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 (gl_skb->data, packet->packet_data, size);
// set skb data size
gl_skb->len = size;
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);
}
// 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: illegal rx length %d", skb->len);
return 0;
}
return 1;
}
static struct sk_buff *
genelink_tx_fixup (struct usbnet *dev, struct sk_buff *skb, int 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;
}
// attach the packet count to the header
packet_count = (u32 *) skb_push (skb, (4 + 4*1));
packet_len = packet_count + 1;
// FIXME little endian?
*packet_count = 1;
*packet_len = length;
// add padding byte
if ((skb->len % dev->maxpacket) == 0)
skb_put (skb, 1);
return skb;
}
static const struct driver_info genelink_info = {
.description = "Genesys GeneLink",
.flags = FLAG_FRAMING_GL | FLAG_NO_SETINT,
.rx_fixup = genelink_rx_fixup,
.tx_fixup = genelink_tx_fixup,
.in = 1, .out = 2,
.epsize =64,
#ifdef GENELINK_ACK
.check_connect =genelink_check_connect,
#endif
};
#endif /* CONFIG_USB_GENESYS */
#ifdef CONFIG_USB_NET1080
/*-------------------------------------------------------------------------
*
* Netchip 1080 driver ... http://www.netchip.com
* Used in LapLink cables
*
*-------------------------------------------------------------------------*/
/*
* 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:
u16 hdr_len; // sizeof nc_header (LE, all)
u16 packet_len; // payload size (including ethhdr)
u16 packet_id; // detects dropped packets
#define MIN_HEADER 6
// all else is optional, and must start with:
// u16 vendorId; // from usb-if
// u16 productId;
} __attribute__((__packed__));
#define PAD_BYTE ((unsigned char)0xAC)
struct nc_trailer {
u16 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)
/*
* 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,
CONTROL_TIMEOUT_JIFFIES);
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,
0, 0, // data is in setup packet
CONTROL_TIMEOUT_JIFFIES);
}
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)
{
#ifdef DEBUG
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
);
#endif
}
/*-------------------------------------------------------------------------*/
/*
* 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)
{
#ifdef DEBUG
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
);
#endif
}
/*-------------------------------------------------------------------------*/
/*
* 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)
{
#ifdef DEBUG
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)
);
#endif
}
/*-------------------------------------------------------------------------*/
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 (dev->msg_level >= 2)
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 int net1080_rx_fixup (struct usbnet *dev, struct sk_buff *skb)
{
struct nc_header *header;
struct nc_trailer *trailer;
if (!(skb->len & 0x01)
|| MIN_FRAMED > skb->len
|| skb->len > FRAMED_SIZE (dev->net.mtu)) {
dev->stats.rx_frame_errors++;
dbg ("rx framesize %d range %d..%d mtu %d", skb->len,
(int)MIN_FRAMED, (int)FRAMED_SIZE (dev->net.mtu),
dev->net.mtu);
return 0;
}
header = (struct nc_header *) skb->data;
le16_to_cpus (&header->hdr_len);
le16_to_cpus (&header->packet_len);
if (FRAMED_SIZE (header->packet_len) > MAX_PACKET) {
dev->stats.rx_frame_errors++;
dbg ("packet too big, %d", header->packet_len);
return 0;
} else if (header->hdr_len < MIN_HEADER) {
dev->stats.rx_frame_errors++;
dbg ("header too short, %d", header->hdr_len);
return 0;
} else if (header->hdr_len > MIN_HEADER) {
// out of band data for us?
dbg ("header OOB, %d bytes",
header->hdr_len - MIN_HEADER);
// switch (vendor/product ids) { ... }
}
skb_pull (skb, header->hdr_len);
trailer = (struct nc_trailer *)
(skb->data + skb->len - sizeof *trailer);
skb_trim (skb, skb->len - sizeof *trailer);
if ((header->packet_len & 0x01) == 0) {
if (skb->data [header->packet_len] != PAD_BYTE) {
dev->stats.rx_frame_errors++;
dbg ("bad pad");
return 0;
}
skb_trim (skb, skb->len - 1);
}
if (skb->len != header->packet_len) {
dev->stats.rx_frame_errors++;
dbg ("bad packet len %d (expected %d)",
skb->len, header->packet_len);
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",
header->packet_id, 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
return 1;
}
static struct sk_buff *
net1080_tx_fixup (struct usbnet *dev, struct sk_buff *skb, int flags)
{
int padlen;
struct sk_buff *skb2;
padlen = ((skb->len + sizeof (struct nc_header)
+ sizeof (struct nc_trailer)) & 0x01) ? 0 : 1;
if (!skb_cloned (skb)) {
int headroom = skb_headroom (skb);
int tailroom = skb_tailroom (skb);
if ((padlen + sizeof (struct nc_trailer)) <= tailroom
&& sizeof (struct nc_header) <= headroom)
return skb;
if ((sizeof (struct nc_header) + padlen
+ sizeof (struct nc_trailer)) <
(headroom + tailroom)) {
skb->data = memmove (skb->head
+ sizeof (struct nc_header),
skb->data, skb->len);
skb->tail = skb->data + skb->len;
return skb;
}
}
skb2 = skb_copy_expand (skb,
sizeof (struct nc_header),
sizeof (struct nc_trailer) + padlen,
flags);
dev_kfree_skb_any (skb);
return skb2;
}
static const struct driver_info net1080_info = {
.description = "NetChip TurboCONNECT",
.flags = FLAG_FRAMING_NC,
.reset = net1080_reset,
.check_connect =net1080_check_connect,
.rx_fixup = net1080_rx_fixup,
.tx_fixup = net1080_tx_fixup,
};
#endif /* CONFIG_USB_NET1080 */
#ifdef CONFIG_USB_PL2301
/*-------------------------------------------------------------------------
*
* Prolific PL-2301/PL-2302 driver ... http://www.prolifictech.com
*
*-------------------------------------------------------------------------*/
/*
* Bits 0-4 can be used for software handshaking; they're set from
* one end, cleared from the other, "read" with the interrupt byte.
*/
#define PL_S_EN (1<<7) /* (feature only) suspend enable */
/* reserved bit -- rx ready (6) ? */
#define PL_TX_READY (1<<5) /* (interrupt only) transmit ready */
#define PL_RESET_OUT (1<<4) /* reset output pipe */
#define PL_RESET_IN (1<<3) /* reset input pipe */
#define PL_TX_C (1<<2) /* transmission complete */
#define PL_TX_REQ (1<<1) /* transmission received */
#define PL_PEER_E (1<<0) /* peer exists */
static inline int
pl_vendor_req (struct usbnet *dev, u8 req, u8 val, u8 index)
{
return usb_control_msg (dev->udev,
usb_rcvctrlpipe (dev->udev, 0),
req,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
val, index,
0, 0,
CONTROL_TIMEOUT_JIFFIES);
}
static inline int
pl_clear_QuickLink_features (struct usbnet *dev, int val)
{
return pl_vendor_req (dev, 1, (u8) val, 0);
}
static inline int
pl_set_QuickLink_features (struct usbnet *dev, int val)
{
return pl_vendor_req (dev, 3, (u8) val, 0);
}
/*-------------------------------------------------------------------------*/
static int pl_reset (struct usbnet *dev)
{
return pl_set_QuickLink_features (dev,
PL_S_EN|PL_RESET_OUT|PL_RESET_IN|PL_PEER_E);
}
static const struct driver_info prolific_info = {
.description = "Prolific PL-2301/PL-2302",
.flags = FLAG_NO_SETINT,
/* some PL-2302 versions seem to fail usb_set_interface() */
.reset = pl_reset,
};
#endif /* CONFIG_USB_PL2301 */
#ifdef CONFIG_USB_ARMLINUX
/*-------------------------------------------------------------------------
*
* Standard ARM kernels include a "usb-eth" driver, or a newer
* "ethernet gadget" driver for basic USB connectivity. The vendor
* and product code may also be used for other non-CDC Linux devices,
* if they all maintain protocol compatibility.
*
* That means lots of hardware could match here, possibly using
* different endpoint numbers (and bcdVersion ids). so we rely on
* endpoint descriptors to sort that out for us.
*
* (Current Zaurus models need a different driver; see later.)
*
*-------------------------------------------------------------------------*/
static const struct driver_info linuxdev_info = {
.description = "Linux Device",
.check_connect = always_connected,
};
static const struct driver_info yopy_info = {
.description = "Yopy",
.check_connect = always_connected,
};
static const struct driver_info blob_info = {
.description = "Boot Loader OBject",
.check_connect = always_connected,
};
#endif /* CONFIG_USB_ARMLINUX */
#ifdef CONFIG_USB_ZAURUS
#include <linux/crc32.h>
/*-------------------------------------------------------------------------
*
* Zaurus PDAs are also ARM based, but currently use different drivers
* (and framing) for USB slave/gadget controllers than the case above.
*
* For the current version of that driver, the main way that framing is
* nonstandard (also from perspective of the CDC ethernet model!) is a
* crc32, added to help detect when some sa1100 usb-to-memory DMA errata
* haven't been fully worked around.
*
*-------------------------------------------------------------------------*/
static struct sk_buff *
zaurus_tx_fixup (struct usbnet *dev, struct sk_buff *skb, int flags)
{
int padlen;
struct sk_buff *skb2;
padlen = 2;
if (!skb_cloned (skb)) {
int tailroom = skb_tailroom (skb);
if ((padlen + 4) <= tailroom)
goto done;
}
skb2 = skb_copy_expand (skb, 0, 4 + padlen, flags);
dev_kfree_skb_any (skb);
skb = skb2;
if (skb) {
u32 fcs;
done:
fcs = crc32_le (~0, skb->data, skb->len);
fcs = ~fcs;
*skb_put (skb, 1) = fcs & 0xff;
*skb_put (skb, 1) = (fcs>> 8) & 0xff;
*skb_put (skb, 1) = (fcs>>16) & 0xff;
*skb_put (skb, 1) = (fcs>>24) & 0xff;
}
return skb;
}
/* SA-1100 based */
static const struct driver_info zaurus_sl5x00_info = {
.description = "Sharp Zaurus SL-5x00",
.flags = FLAG_FRAMING_Z,
.check_connect = always_connected,
.tx_fixup = zaurus_tx_fixup,
.in = 2, .out = 1,
.epsize = 64,
};
/* PXA-2xx based */
static const struct driver_info zaurus_pxa_info = {
.description = "Sharp Zaurus, PXA-2xx based",
.flags = FLAG_FRAMING_Z,
.check_connect = always_connected,
.tx_fixup = zaurus_tx_fixup,
.in = 1, .out = 2,
.epsize = 64,
};
#endif
/*-------------------------------------------------------------------------
*
* Network Device Driver (peer link to "Host Device", from USB host)
*
*-------------------------------------------------------------------------*/
static int usbnet_change_mtu (struct net_device *net, int new_mtu)
{
struct usbnet *dev = (struct usbnet *) net->priv;
if (new_mtu <= MIN_PACKET || new_mtu > MAX_PACKET)
return -EINVAL;
#ifdef CONFIG_USB_NET1080
if (((dev->driver_info->flags) & FLAG_FRAMING_NC)) {
if (FRAMED_SIZE (new_mtu) > MAX_PACKET)
return -EINVAL;
}
#endif
#ifdef CONFIG_USB_GENESYS
if (((dev->driver_info->flags) & FLAG_FRAMING_GL)
&& new_mtu > GL_MAX_PACKET_LEN)
return -EINVAL;
#endif
// no second zero-length packet read wanted after mtu-sized packets
if (((new_mtu + sizeof (struct ethhdr)) % dev->maxpacket) == 0)
return -EDOM;
net->mtu = new_mtu;
return 0;
}
/*-------------------------------------------------------------------------*/
static struct net_device_stats *usbnet_get_stats (struct net_device *net)
{
return &((struct usbnet *) net->priv)->stats;
}
/*-------------------------------------------------------------------------*/
/* urb completions may be in_irq; avoid doing real work then. */
static void defer_bh (struct usbnet *dev, struct sk_buff *skb)
{
struct sk_buff_head *list = skb->list;
unsigned long flags;
spin_lock_irqsave (&list->lock, flags);
__skb_unlink (skb, list);
spin_unlock (&list->lock);
spin_lock (&dev->done.lock);
__skb_queue_tail (&dev->done, skb);
if (dev->done.qlen == 1)
tasklet_schedule (&dev->bh);
spin_unlock_irqrestore (&dev->done.lock, flags);
}
/* some work can't be done in tasklets, so we use keventd
*
* NOTE: annoying asymmetry: if it's active, schedule_task() fails,
* but tasklet_schedule() doesn't. hope the failure is rare.
*/
static void defer_kevent (struct usbnet *dev, int work)
{
set_bit (work, &dev->flags);
if (!schedule_task (&dev->kevent))
err ("%s: kevent %d may have been dropped",
dev->net.name, work);
else
dbg ("%s: kevent %d scheduled", dev->net.name, work);
}
/*-------------------------------------------------------------------------*/
static void rx_complete (struct urb *urb);
static void rx_submit (struct usbnet *dev, struct urb *urb, int flags)
{
struct sk_buff *skb;
struct skb_data *entry;
int retval = 0;
unsigned long lockflags;
size_t size;
#ifdef CONFIG_USB_NET1080
if (dev->driver_info->flags & FLAG_FRAMING_NC)
size = FRAMED_SIZE (dev->net.mtu);
else
#endif
#ifdef CONFIG_USB_GENESYS
if (dev->driver_info->flags & FLAG_FRAMING_GL)
size = GL_RCV_BUF_SIZE;
else
#endif
#ifdef CONFIG_USB_ZAURUS
if (dev->driver_info->flags & FLAG_FRAMING_Z)
size = 6 + (sizeof (struct ethhdr) + dev->net.mtu);
else
#endif
size = (sizeof (struct ethhdr) + dev->net.mtu);
if ((skb = alloc_skb (size, flags)) == 0) {
dbg ("no rx skb");
defer_kevent (dev, EVENT_RX_MEMORY);
usb_free_urb (urb);
return;
}
entry = (struct skb_data *) skb->cb;
entry->urb = urb;
entry->dev = dev;
entry->state = rx_start;
entry->length = 0;
usb_fill_bulk_urb (urb, dev->udev, dev->in,
skb->data, size, rx_complete, skb);
urb->transfer_flags |= USB_ASYNC_UNLINK;
spin_lock_irqsave (&dev->rxq.lock, lockflags);
if (netif_running (&dev->net)
&& !test_bit (EVENT_RX_HALT, &dev->flags)) {
switch (retval = SUBMIT_URB (urb, GFP_ATOMIC)){
case -EPIPE:
defer_kevent (dev, EVENT_RX_HALT);
break;
case -ENOMEM:
defer_kevent (dev, EVENT_RX_MEMORY);
break;
default:
dbg ("%s rx submit, %d", dev->net.name, retval);
tasklet_schedule (&dev->bh);
break;
case 0:
__skb_queue_tail (&dev->rxq, skb);
}
} else {
dbg ("rx: stopped");
retval = -ENOLINK;
}
spin_unlock_irqrestore (&dev->rxq.lock, lockflags);
if (retval) {
dev_kfree_skb_any (skb);
usb_free_urb (urb);
}
}
/*-------------------------------------------------------------------------*/
static inline void rx_process (struct usbnet *dev, struct sk_buff *skb)
{
if (dev->driver_info->rx_fixup
&& !dev->driver_info->rx_fixup (dev, skb))
goto error;
// else network stack removes extra byte if we forced a short packet
if (skb->len) {
int status;
skb->dev = &dev->net;
skb->protocol = eth_type_trans (skb, &dev->net);
dev->stats.rx_packets++;
dev->stats.rx_bytes += skb->len;
#ifdef VERBOSE
devdbg (dev, "< rx, len %d, type 0x%x",
skb->len + sizeof (struct ethhdr), skb->protocol);
#endif
memset (skb->cb, 0, sizeof (struct skb_data));
status = netif_rx (skb);
if (status != NET_RX_SUCCESS)
devdbg (dev, "netif_rx status %d", status);
} else {
dbg ("drop");
error:
dev->stats.rx_errors++;
skb_queue_tail (&dev->done, skb);
}
}
/*-------------------------------------------------------------------------*/
static void rx_complete (struct urb *urb)
{
struct sk_buff *skb = (struct sk_buff *) urb->context;
struct skb_data *entry = (struct skb_data *) skb->cb;
struct usbnet *dev = entry->dev;
int urb_status = urb->status;
skb_put (skb, urb->actual_length);
entry->state = rx_done;
entry->urb = 0;
switch (urb_status) {
// success
case 0:
if (MIN_PACKET > skb->len || skb->len > MAX_PACKET) {
entry->state = rx_cleanup;
dev->stats.rx_errors++;
dev->stats.rx_length_errors++;
dbg ("rx length %d", skb->len);
}
break;
// stalls need manual reset. this is rare ... except that
// when going through USB 2.0 TTs, unplug appears this way.
// we avoid the highspeed version of the ETIMEOUT/EILSEQ
// storm, recovering as needed.
case -EPIPE:
defer_kevent (dev, EVENT_RX_HALT);
// FALLTHROUGH
// software-driven interface shutdown
case -ECONNRESET: // according to API spec
case -ECONNABORTED: // some (now fixed?) UHCI bugs
dbg ("%s rx shutdown, code %d", dev->net.name, urb_status);
entry->state = rx_cleanup;
// do urb frees only in the tasklet (UHCI has oopsed ...)
entry->urb = urb;
urb = 0;
break;
// data overrun ... flush fifo?
case -EOVERFLOW:
dev->stats.rx_over_errors++;
// FALLTHROUGH
default:
// on unplug we get ETIMEDOUT (ohci) or EILSEQ (uhci)
// until khubd sees its interrupt and disconnects us.
// that can easily be hundreds of passes through here.
entry->state = rx_cleanup;
dev->stats.rx_errors++;
dbg ("%s rx: status %d", dev->net.name, urb_status);
break;
}
defer_bh (dev, skb);
if (urb) {
if (netif_running (&dev->net)
&& !test_bit (EVENT_RX_HALT, &dev->flags)) {
rx_submit (dev, urb, GFP_ATOMIC);
return;
}
usb_free_urb (urb);
}
#ifdef VERBOSE
dbg ("no read resubmitted");
#endif /* VERBOSE */
}
/*-------------------------------------------------------------------------*/
// unlink pending rx/tx; completion handlers do all other cleanup
static int unlink_urbs (struct sk_buff_head *q)
{
unsigned long flags;
struct sk_buff *skb, *skbnext;
int count = 0;
spin_lock_irqsave (&q->lock, flags);
for (skb = q->next; skb != (struct sk_buff *) q; skb = skbnext) {
struct skb_data *entry;
struct urb *urb;
int retval;
entry = (struct skb_data *) skb->cb;
urb = entry->urb;
skbnext = skb->next;
// during some PM-driven resume scenarios,
// these (async) unlinks complete immediately
retval = usb_unlink_urb (urb);
if (retval != -EINPROGRESS && retval != 0)
dbg ("unlink urb err, %d", retval);
else
count++;
}
spin_unlock_irqrestore (&q->lock, flags);
return count;
}
/*-------------------------------------------------------------------------*/
// precondition: never called in_interrupt
static int usbnet_stop (struct net_device *net)
{
struct usbnet *dev = (struct usbnet *) net->priv;
int temp;
DECLARE_WAIT_QUEUE_HEAD (unlink_wakeup);
DECLARE_WAITQUEUE (wait, current);
mutex_lock (&dev->mutex);
netif_stop_queue (net);
if (dev->msg_level >= 2)
devinfo (dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld",
dev->stats.rx_packets, dev->stats.tx_packets,
dev->stats.rx_errors, dev->stats.tx_errors
);
// ensure there are no more active urbs
add_wait_queue (&unlink_wakeup, &wait);
dev->wait = &unlink_wakeup;
temp = unlink_urbs (&dev->txq) + unlink_urbs (&dev->rxq);
// maybe wait for deletions to finish.
while (skb_queue_len (&dev->rxq)
&& skb_queue_len (&dev->txq)
&& skb_queue_len (&dev->done)) {
set_current_state (TASK_UNINTERRUPTIBLE);
schedule_timeout (UNLINK_TIMEOUT_JIFFIES);
dbg ("waited for %d urb completions", temp);
}
dev->wait = 0;
remove_wait_queue (&unlink_wakeup, &wait);
mutex_unlock (&dev->mutex);
return 0;
}
/*-------------------------------------------------------------------------*/
// posts reads, and enables write queing
// precondition: never called in_interrupt
static int usbnet_open (struct net_device *net)
{
struct usbnet *dev = (struct usbnet *) net->priv;
int retval = 0;
struct driver_info *info = dev->driver_info;
mutex_lock (&dev->mutex);
// put into "known safe" state
if (info->reset && (retval = info->reset (dev)) < 0) {
devinfo (dev, "open reset fail (%d) usbnet usb-%s-%s, %s",
retval,
dev->udev->bus->bus_name, dev->udev->devpath,
info->description);
goto done;
}
// insist peer be connected
if (info->check_connect && (retval = info->check_connect (dev)) < 0) {
devdbg (dev, "can't open; %d", retval);
goto done;
}
netif_start_queue (net);
if (dev->msg_level >= 2)
devinfo (dev, "open: enable queueing "
"(rx %d, tx %d) mtu %d %s framing",
RX_QLEN, TX_QLEN, dev->net.mtu,
(info->flags & (FLAG_FRAMING_NC | FLAG_FRAMING_GL))
? ((info->flags & FLAG_FRAMING_NC)
? "NetChip"
: "GeneSys")
: "raw"
);
// delay posting reads until we're fully open
tasklet_schedule (&dev->bh);
done:
mutex_unlock (&dev->mutex);
return retval;
}
/*-------------------------------------------------------------------------*/
static void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info)
{
struct usbnet *dev = net->priv;
strncpy (info->driver, driver_name, sizeof info->driver);
strncpy (info->version, DRIVER_VERSION, sizeof info->version);
strncpy (info->fw_version, dev->driver_info->description,
sizeof info->fw_version);
usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info);
}
static u32 usbnet_get_link (struct net_device *net)
{
struct usbnet *dev = net->priv;
/* If a check_connect is defined, return it's results */
if (dev->driver_info->check_connect)
return dev->driver_info->check_connect (dev) == 0;
/* Otherwise, we're up to avoid breaking scripts */
return 1;
}
static u32 usbnet_get_msglevel (struct net_device *net)
{
struct usbnet *dev = net->priv;
return dev->msg_level;
}
static void usbnet_set_msglevel (struct net_device *net, u32 level)
{
struct usbnet *dev = net->priv;
dev->msg_level = level;
}
static int usbnet_ioctl (struct net_device *net, struct ifreq *rq, int cmd)
{
#ifdef NEED_MII
{
struct usbnet *dev = (struct usbnet *)net->priv;
if (dev->mii.mdio_read != NULL && dev->mii.mdio_write != NULL)
return generic_mii_ioctl(&dev->mii,
(struct mii_ioctl_data *) &rq->ifr_data,
cmd, NULL);
}
#endif
return -EOPNOTSUPP;
}
/*-------------------------------------------------------------------------*/
/* work that cannot be done in interrupt context uses keventd.
*
* NOTE: "uhci" and "usb-uhci" may have trouble with this since they don't
* queue control transfers to individual devices, and other threads could
* trigger control requests concurrently. hope that's rare.
*/
static void
kevent (void *data)
{
struct usbnet *dev = data;
int status;
/* usb_clear_halt() needs a thread context */
if (test_bit (EVENT_TX_HALT, &dev->flags)) {
unlink_urbs (&dev->txq);
status = usb_clear_halt (dev->udev, dev->out);
if (status < 0)
err ("%s: can't clear tx halt, status %d",
dev->net.name, status);
else {
clear_bit (EVENT_TX_HALT, &dev->flags);
netif_wake_queue (&dev->net);
}
}
if (test_bit (EVENT_RX_HALT, &dev->flags)) {
unlink_urbs (&dev->rxq);
status = usb_clear_halt (dev->udev, dev->in);
if (status < 0)
err ("%s: can't clear rx halt, status %d",
dev->net.name, status);
else {
clear_bit (EVENT_RX_HALT, &dev->flags);
tasklet_schedule (&dev->bh);
}
}
/* tasklet could resubmit itself forever if memory is tight */
if (test_bit (EVENT_RX_MEMORY, &dev->flags)) {
struct urb *urb = 0;
if (netif_running (&dev->net))
urb = ALLOC_URB (0, GFP_KERNEL);
else
clear_bit (EVENT_RX_MEMORY, &dev->flags);
if (urb != 0) {
clear_bit (EVENT_RX_MEMORY, &dev->flags);
rx_submit (dev, urb, GFP_KERNEL);
tasklet_schedule (&dev->bh);
}
}
if (dev->flags)
dbg ("%s: kevent done, flags = 0x%lx",
dev->net.name, dev->flags);
}
/*-------------------------------------------------------------------------*/
static void tx_complete (struct urb *urb)
{
struct sk_buff *skb = (struct sk_buff *) urb->context;
struct skb_data *entry = (struct skb_data *) skb->cb;
struct usbnet *dev = entry->dev;
if (urb->status == -EPIPE)
defer_kevent (dev, EVENT_TX_HALT);
urb->dev = 0;
entry->state = tx_done;
defer_bh (dev, skb);
}
/*-------------------------------------------------------------------------*/
static void usbnet_tx_timeout (struct net_device *net)
{
struct usbnet *dev = (struct usbnet *) net->priv;
unlink_urbs (&dev->txq);
tasklet_schedule (&dev->bh);
// FIXME: device recovery -- reset?
}
/*-------------------------------------------------------------------------*/
static int usbnet_start_xmit (struct sk_buff *skb, struct net_device *net)
{
struct usbnet *dev = (struct usbnet *) net->priv;
int length;
int retval = NET_XMIT_SUCCESS;
struct urb *urb = 0;
struct skb_data *entry;
struct driver_info *info = dev->driver_info;
unsigned long flags;
#ifdef CONFIG_USB_NET1080
struct nc_header *header = 0;
struct nc_trailer *trailer = 0;
#endif /* CONFIG_USB_NET1080 */
// some devices want funky USB-level framing, for
// win32 driver (usually) and/or hardware quirks
if (info->tx_fixup) {
skb = info->tx_fixup (dev, skb, GFP_ATOMIC);
if (!skb) {
dbg ("can't tx_fixup skb");
goto drop;
}
}
length = skb->len;
if (!(urb = ALLOC_URB (0, GFP_ATOMIC))) {
dbg ("no urb");
goto drop;
}
entry = (struct skb_data *) skb->cb;
entry->urb = urb;
entry->dev = dev;
entry->state = tx_start;
entry->length = length;
// FIXME: reorganize a bit, so that fixup() fills out NetChip
// framing too. (Packet ID update needs the spinlock...)
// [ BETTER: we already own net->xmit_lock, that's enough ]
#ifdef CONFIG_USB_NET1080
if (info->flags & FLAG_FRAMING_NC) {
header = (struct nc_header *) skb_push (skb, sizeof *header);
header->hdr_len = cpu_to_le16 (sizeof (*header));
header->packet_len = cpu_to_le16 (length);
if (!((skb->len + sizeof *trailer) & 0x01))
*skb_put (skb, 1) = PAD_BYTE;
trailer = (struct nc_trailer *) skb_put (skb, sizeof *trailer);
} else
#endif /* CONFIG_USB_NET1080 */
/* don't assume the hardware handles USB_ZERO_PACKET */
if ((length % dev->maxpacket) == 0)
skb->len++;
usb_fill_bulk_urb (urb, dev->udev, dev->out,
skb->data, skb->len, tx_complete, skb);
urb->transfer_flags |= USB_ASYNC_UNLINK;
spin_lock_irqsave (&dev->txq.lock, flags);
#ifdef CONFIG_USB_NET1080
if (info->flags & FLAG_FRAMING_NC) {
header->packet_id = cpu_to_le16 (dev->packet_id++);
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
}
#endif /* CONFIG_USB_NET1080 */
switch ((retval = SUBMIT_URB (urb, GFP_ATOMIC))) {
case -EPIPE:
netif_stop_queue (net);
defer_kevent (dev, EVENT_TX_HALT);
break;
default:
dbg ("%s tx: submit urb err %d", net->name, retval);
break;
case 0:
net->trans_start = jiffies;
__skb_queue_tail (&dev->txq, skb);
if (dev->txq.qlen >= TX_QLEN)
netif_stop_queue (net);
}
spin_unlock_irqrestore (&dev->txq.lock, flags);
if (retval) {
devdbg (dev, "drop, code %d", retval);
drop:
retval = NET_XMIT_SUCCESS;
dev->stats.tx_dropped++;
if (skb)
dev_kfree_skb_any (skb);
usb_free_urb (urb);
#ifdef VERBOSE
} else {
devdbg (dev, "> tx, len %d, type 0x%x",
length, skb->protocol);
#endif
}
return retval;
}
/*-------------------------------------------------------------------------*/
// tasklet ... work that avoided running in_irq()
static void usbnet_bh (unsigned long param)
{
struct usbnet *dev = (struct usbnet *) param;
struct sk_buff *skb;
struct skb_data *entry;
while ((skb = skb_dequeue (&dev->done))) {
entry = (struct skb_data *) skb->cb;
switch (entry->state) {
case rx_done:
entry->state = rx_cleanup;
rx_process (dev, skb);
continue;
case tx_done:
if (entry->urb->status) {
// can this statistic become more specific?
dev->stats.tx_errors++;
dbg ("%s tx: err %d", dev->net.name,
entry->urb->status);
} else {
dev->stats.tx_packets++;
dev->stats.tx_bytes += entry->length;
}
// FALLTHROUGH:
case rx_cleanup:
usb_free_urb (entry->urb);
dev_kfree_skb (skb);
continue;
default:
dbg ("%s: bogus skb state %d",
dev->net.name, entry->state);
}
}
// waiting for all pending urbs to complete?
if (dev->wait) {
if ((dev->txq.qlen + dev->rxq.qlen + dev->done.qlen) == 0) {
wake_up (dev->wait);
}
// or are we maybe short a few urbs?
} else if (netif_running (&dev->net)
&& !test_bit (EVENT_RX_HALT, &dev->flags)) {
int temp = dev->rxq.qlen;
if (temp < RX_QLEN) {
struct urb *urb;
int i;
for (i = 0; i < 3 && dev->rxq.qlen < RX_QLEN; i++) {
if ((urb = ALLOC_URB (0, GFP_ATOMIC)) != 0)
rx_submit (dev, urb, GFP_ATOMIC);
}
if (temp != dev->rxq.qlen)
devdbg (dev, "rxqlen %d --> %d",
temp, dev->rxq.qlen);
if (dev->rxq.qlen < RX_QLEN)
tasklet_schedule (&dev->bh);
}
if (dev->txq.qlen < TX_QLEN)
netif_wake_queue (&dev->net);
}
}
/*-------------------------------------------------------------------------
*
* USB Device Driver support
*
*-------------------------------------------------------------------------*/
// precondition: never called in_interrupt
static void usbnet_disconnect (struct usb_device *udev, void *ptr)
{
struct usbnet *dev = (struct usbnet *) ptr;
devinfo (dev, "unregister usbnet usb-%s-%s, %s",
udev->bus->bus_name, udev->devpath,
dev->driver_info->description);
unregister_netdev (&dev->net);
mutex_lock (&usbnet_mutex);
mutex_lock (&dev->mutex);
list_del (&dev->dev_list);
mutex_unlock (&usbnet_mutex);
// assuming we used keventd, it must quiesce too
flush_scheduled_tasks ();
kfree (dev);
usb_put_dev (udev);
}
/*-------------------------------------------------------------------------*/
// precondition: never called in_interrupt
static void *
usbnet_probe (struct usb_device *udev, unsigned ifnum,
const struct usb_device_id *prod)
{
struct usbnet *dev;
struct net_device *net;
struct driver_info *info;
int altnum = 0;
int status;
info = (struct driver_info *) prod->driver_info;
#ifdef CONFIG_USB_ZAURUS
if (info == &zaurus_sl5x00_info) {
int status;
/* old ROMs have more than one config
* so we have to make sure config="1" (?)
*/
status = usb_set_configuration (udev, 1);
if (status < 0) {
err ("set_config failed, %d", status);
return 0;
}
altnum = 1;
}
#endif
// more sanity (unless the device is broken)
if (!(info->flags & FLAG_NO_SETINT)) {
if (usb_set_interface (udev, ifnum, altnum) < 0) {
err ("set_interface failed");
return 0;
}
}
// set up our own records
if (!(dev = kmalloc (sizeof *dev, GFP_KERNEL))) {
dbg ("can't kmalloc dev");
return 0;
}
memset (dev, 0, sizeof *dev);
init_MUTEX_LOCKED (&dev->mutex);
usb_get_dev (udev);
dev->udev = udev;
dev->driver_info = info;
dev->msg_level = msg_level;
INIT_LIST_HEAD (&dev->dev_list);
skb_queue_head_init (&dev->rxq);
skb_queue_head_init (&dev->txq);
skb_queue_head_init (&dev->done);
dev->bh.func = usbnet_bh;
dev->bh.data = (unsigned long) dev;
INIT_TQUEUE (&dev->kevent, kevent, dev);
// set up network interface records
net = &dev->net;
SET_MODULE_OWNER (net);
net->priv = dev;
strcpy (net->name, "usb%d");
memcpy (net->dev_addr, node_id, sizeof node_id);
// point-to-point link ... we always use Ethernet headers
// supports win32 interop and the bridge driver.
ether_setup (net);
net->change_mtu = usbnet_change_mtu;
net->get_stats = usbnet_get_stats;
net->hard_start_xmit = usbnet_start_xmit;
net->open = usbnet_open;
net->stop = usbnet_stop;
net->watchdog_timeo = TX_TIMEOUT_JIFFIES;
net->tx_timeout = usbnet_tx_timeout;
net->do_ioctl = usbnet_ioctl;
net->ethtool_ops = &usbnet_ethtool_ops;
// allow device-specific bind/init procedures
// NOTE net->name still not usable ...
if (info->bind) {
status = info->bind (dev, udev);
// heuristic: "usb%d" for links we know are two-host,
// else "eth%d" when there's reasonable doubt. userspace
// can rename the link if it knows better.
if ((dev->driver_info->flags & FLAG_ETHER) != 0
&& (net->dev_addr [0] & 0x02) == 0)
strcpy (net->name, "eth%d");
} else if (!info->in || info->out)
status = get_endpoints (dev, udev->actconfig->interface + ifnum);
else {
dev->in = usb_rcvbulkpipe (udev, info->in);
dev->out = usb_sndbulkpipe (udev, info->out);
}
dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1);
register_netdev (&dev->net);
devinfo (dev, "register usbnet usb-%s-%s, %s",
udev->bus->bus_name, udev->devpath,
dev->driver_info->description);
// ok, it's ready to go.
mutex_lock (&usbnet_mutex);
list_add (&dev->dev_list, &usbnet_list);
mutex_unlock (&dev->mutex);
// start as if the link is up
netif_device_attach (&dev->net);
mutex_unlock (&usbnet_mutex);
return dev;
}
/*-------------------------------------------------------------------------*/
/*
* chip vendor names won't normally be on the cables, and
* may not be on the device.
*/
static const struct usb_device_id products [] = {
#ifdef CONFIG_USB_AN2720
{
USB_DEVICE (0x0547, 0x2720), // AnchorChips defaults
.driver_info = (unsigned long) &an2720_info,
}, {
USB_DEVICE (0x0547, 0x2727), // Xircom PGUNET
.driver_info = (unsigned long) &an2720_info,
},
#endif
#ifdef CONFIG_USB_AX8817X
{
// Linksys USB200M
USB_DEVICE (0x077b, 0x2226),
.driver_info = (unsigned long) &ax8817x_info,
}, {
// Netgear FA120
USB_DEVICE (0x0846, 0x1040),
.driver_info = (unsigned long) &netgear_fa120_info,
}, {
// DLink DUB-E100
USB_DEVICE (0x2001, 0x1a00),
.driver_info = (unsigned long) &dlink_dub_e100_info,
}, {
// Intellinet, ST Lab USB Ethernet
USB_DEVICE (0x0b95, 0x1720),
.driver_info = (unsigned long) &ax8817x_info,
}, {
// Hawking UF200, TrendNet TU2-ET100
USB_DEVICE (0x07b8, 0x420a),
.driver_info = (unsigned long) &hawking_uf200_info,
}, {
// ATEN UC210T
USB_DEVICE (0x0557, 0x2009),
.driver_info = (unsigned long) &ax8817x_info,
},
#endif
#ifdef CONFIG_USB_BELKIN
{
USB_DEVICE (0x050d, 0x0004), // Belkin
.driver_info = (unsigned long) &belkin_info,
}, {
USB_DEVICE (0x056c, 0x8100), // eTEK
.driver_info = (unsigned long) &belkin_info,
}, {
USB_DEVICE (0x0525, 0x9901), // Advance USBNET (eTEK)
.driver_info = (unsigned long) &belkin_info,
},
#endif
#ifdef CONFIG_USB_EPSON2888
{
USB_DEVICE (0x0525, 0x2888), // EPSON USB client
.driver_info = (unsigned long) &epson2888_info,
},
#endif
#ifdef CONFIG_USB_GENESYS
{
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
*/
#endif
#ifdef CONFIG_USB_NET1080
{
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,
},
#endif
#ifdef CONFIG_USB_PL2301
{
USB_DEVICE (0x067b, 0x0000), // PL-2301
.driver_info = (unsigned long) &prolific_info,
}, {
USB_DEVICE (0x067b, 0x0001), // PL-2302
.driver_info = (unsigned long) &prolific_info,
},
#endif
#ifdef CONFIG_USB_ARMLINUX
/*
* SA-1100 using standard ARM Linux kernels, or compatible.
* Often used when talking to Linux PDAs (iPaq, Yopy, etc).
* The sa-1100 "usb-eth" driver handles the basic framing.
* ARMv4.
*
* PXA2xx using usb "gadget" driver, or older "usb-eth" much like
* the sa1100 one. (But PXA hardware uses different endpoints.)
* ARMv5TE.
*/
{
// 1183 = 0x049F, both used as hex values?
// Compaq "Itsy" vendor/product id
// version numbers vary, along with endpoint usage
// but otherwise they're protocol-compatible
USB_DEVICE (0x049F, 0x505A),
.driver_info = (unsigned long) &linuxdev_info,
}, {
USB_DEVICE (0x0E7E, 0x1001), // G.Mate "Yopy"
.driver_info = (unsigned long) &yopy_info,
}, {
USB_DEVICE (0x8086, 0x07d3), // "blob" bootloader
.driver_info = (unsigned long) &blob_info,
},
#endif
#ifdef CONFIG_USB_ZAURUS
/*
* SA-1100 based Sharp Zaurus ("collie"), or compatible.
* Same idea as above, but different framing.
*/
{
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x8004,
.bInterfaceClass = 0x0a,
.bInterfaceSubClass = 0x00,
.bInterfaceProtocol = 0x00,
.driver_info = (unsigned long) &zaurus_sl5x00_info,
}, {
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x8005, /* A-300 */
.bInterfaceClass = 0x02,
.bInterfaceSubClass = 0x0a,
.bInterfaceProtocol = 0x00,
.driver_info = (unsigned long) &zaurus_pxa_info,
}, {
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x8006, /* B-500/SL-5600 */
.bInterfaceClass = 0x02,
.bInterfaceSubClass = 0x0a,
.bInterfaceProtocol = 0x00,
.driver_info = (unsigned long) &zaurus_pxa_info,
}, {
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x8007, /* C-700 */
.bInterfaceClass = 0x02,
.bInterfaceSubClass = 0x0a,
.bInterfaceProtocol = 0x00,
.driver_info = (unsigned long) &zaurus_pxa_info,
}, {
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x9031, /* C-750 C-760 */
.bInterfaceClass = 0x02,
.bInterfaceSubClass = 0x0a,
.bInterfaceProtocol = 0x00,
.driver_info = (unsigned long) &zaurus_pxa_info,
}, {
.match_flags = USB_DEVICE_ID_MATCH_INT_INFO
| USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x04DD,
.idProduct = 0x9032, /* SL-6000 */
.bInterfaceClass = 0x02,
.bInterfaceSubClass = 0x0a,
.bInterfaceProtocol = 0x00,
.driver_info = (unsigned long) &zaurus_pxa_info,
},
#endif
{ }, // END
};
MODULE_DEVICE_TABLE (usb, products);
static struct usb_driver usbnet_driver = {
.name = driver_name,
.id_table = products,
.probe = usbnet_probe,
.disconnect = usbnet_disconnect,
};
/* Default ethtool_ops assigned. Devices can override in their bind() routine */
static struct ethtool_ops usbnet_ethtool_ops = {
.get_drvinfo = usbnet_get_drvinfo,
.get_link = usbnet_get_link,
.get_msglevel = usbnet_get_msglevel,
.set_msglevel = usbnet_set_msglevel,
};
/*-------------------------------------------------------------------------*/
static int __init usbnet_init (void)
{
// compiler should optimize this out
if (sizeof (((struct sk_buff *)0)->cb) < sizeof (struct skb_data))
BUG ();
get_random_bytes (node_id, sizeof node_id);
node_id [0] &= 0xfe; // clear multicast bit
node_id [0] |= 0x02; // set local assignment bit (IEEE802)
if (usb_register (&usbnet_driver) < 0)
return -1;
return 0;
}
module_init (usbnet_init);
static void __exit usbnet_exit (void)
{
usb_deregister (&usbnet_driver);
}
module_exit (usbnet_exit);
EXPORT_NO_SYMBOLS;
MODULE_AUTHOR ("David Brownell <dbrownell@users.sourceforge.net>");
MODULE_DESCRIPTION ("USB Host-to-Host Link Drivers (numerous vendors)");
MODULE_LICENSE ("GPL");