348 lines
11 KiB
C
348 lines
11 KiB
C
/*
|
||
* Simple "CDC Subset" USB Networking Links
|
||
* 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
|
||
*/
|
||
|
||
#include <linux/module.h>
|
||
#include <linux/kmod.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 <linux/usb/usbnet.h>
|
||
|
||
|
||
/*
|
||
* This supports simple USB network links that don't require any special
|
||
* framing or hardware control operations. The protocol used here is a
|
||
* strict subset of CDC Ethernet, with three basic differences reflecting
|
||
* the goal that almost any hardware should run it:
|
||
*
|
||
* - Minimal runtime control: one interface, no altsettings, and
|
||
* no vendor or class specific control requests. If a device is
|
||
* configured, it is allowed to exchange packets with the host.
|
||
* Fancier models would mean not working on some hardware.
|
||
*
|
||
* - Minimal manufacturing control: no IEEE "Organizationally
|
||
* Unique ID" required, or an EEPROMs to store one. Each host uses
|
||
* one random "locally assigned" Ethernet address instead, which can
|
||
* of course be overridden using standard tools like "ifconfig".
|
||
* (With 2^46 such addresses, same-net collisions are quite rare.)
|
||
*
|
||
* - There is no additional framing data for USB. Packets are written
|
||
* exactly as in CDC Ethernet, starting with an Ethernet header and
|
||
* terminated by a short packet. However, the host will never send a
|
||
* zero length packet; some systems can't handle those robustly.
|
||
*
|
||
* Anything that can transmit and receive USB bulk packets can implement
|
||
* this protocol. That includes both smart peripherals and quite a lot
|
||
* of "host-to-host" USB cables (which embed two devices back-to-back).
|
||
*
|
||
* Note that although Linux may use many of those host-to-host links
|
||
* with this "cdc_subset" framing, that doesn't mean there may not be a
|
||
* better approach. Handling the "other end unplugs/replugs" scenario
|
||
* well tends to require chip-specific vendor requests. Also, Windows
|
||
* peers at the other end of host-to-host cables may expect their own
|
||
* framing to be used rather than this "cdc_subset" model.
|
||
*/
|
||
|
||
#if defined(CONFIG_USB_EPSON2888) || defined(CONFIG_USB_ARMLINUX)
|
||
/* PDA style devices are always connected if present */
|
||
static int always_connected (struct usbnet *dev)
|
||
{
|
||
return 0;
|
||
}
|
||
#endif
|
||
|
||
#ifdef CONFIG_USB_ALI_M5632
|
||
#define HAVE_HARDWARE
|
||
|
||
/*-------------------------------------------------------------------------
|
||
*
|
||
* ALi M5632 driver ... does high speed
|
||
*
|
||
* NOTE that the MS-Windows drivers for this chip use some funky and
|
||
* (naturally) undocumented 7-byte prefix to each packet, so this is a
|
||
* case where we don't currently interoperate. Also, once you unplug
|
||
* one end of the cable, you need to replug the other end too ... since
|
||
* chip docs are unavailable, there's no way to reset the relevant state
|
||
* short of a power cycle.
|
||
*
|
||
*-------------------------------------------------------------------------*/
|
||
|
||
static const struct driver_info ali_m5632_info = {
|
||
.description = "ALi M5632",
|
||
};
|
||
|
||
#endif
|
||
|
||
|
||
#ifdef CONFIG_USB_AN2720
|
||
#define HAVE_HARDWARE
|
||
|
||
/*-------------------------------------------------------------------------
|
||
*
|
||
* 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
|
||
};
|
||
|
||
#endif /* CONFIG_USB_AN2720 */
|
||
|
||
|
||
#ifdef CONFIG_USB_BELKIN
|
||
#define HAVE_HARDWARE
|
||
|
||
/*-------------------------------------------------------------------------
|
||
*
|
||
* Belkin F5U104 ... two NetChip 2280 devices + Atmel AVR 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
|
||
#define HAVE_HARDWARE
|
||
|
||
/*-------------------------------------------------------------------------
|
||
*
|
||
* 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.
|
||
*
|
||
* Support was from Juro Bystricky <bystricky.juro@erd.epson.com>
|
||
*
|
||
*-------------------------------------------------------------------------*/
|
||
|
||
static const struct driver_info epson2888_info = {
|
||
.description = "Epson USB Device",
|
||
.check_connect = always_connected,
|
||
|
||
.in = 4, .out = 3,
|
||
};
|
||
|
||
#endif /* CONFIG_USB_EPSON2888 */
|
||
|
||
|
||
/*-------------------------------------------------------------------------
|
||
*
|
||
* info from Jonathan McDowell <noodles@earth.li>
|
||
*
|
||
*-------------------------------------------------------------------------*/
|
||
#ifdef CONFIG_USB_KC2190
|
||
#define HAVE_HARDWARE
|
||
static const struct driver_info kc2190_info = {
|
||
.description = "KC Technology KC-190",
|
||
};
|
||
#endif /* CONFIG_USB_KC2190 */
|
||
|
||
|
||
#ifdef CONFIG_USB_ARMLINUX
|
||
#define HAVE_HARDWARE
|
||
|
||
/*-------------------------------------------------------------------------
|
||
*
|
||
* Intel's SA-1100 chip integrates basic USB support, and is used
|
||
* in PDAs like some iPaqs, the Yopy, some Zaurus models, and more.
|
||
* When they run Linux, arch/arm/mach-sa1100/usb-eth.c may be used to
|
||
* network using minimal USB framing data.
|
||
*
|
||
* This describes the driver currently in standard ARM Linux kernels.
|
||
* The Zaurus uses a different driver (see later).
|
||
*
|
||
* PXA25x and PXA210 use XScale cores (ARM v5TE) with better USB support
|
||
* and different USB endpoint numbering than the SA1100 devices. The
|
||
* mach-pxa/usb-eth.c driver re-uses the device ids from mach-sa1100
|
||
* so we rely on the endpoint descriptors.
|
||
*
|
||
*-------------------------------------------------------------------------*/
|
||
|
||
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 */
|
||
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
#ifndef HAVE_HARDWARE
|
||
#warning You need to configure some hardware for this driver
|
||
#endif
|
||
|
||
/*
|
||
* 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_ALI_M5632
|
||
{
|
||
USB_DEVICE (0x0402, 0x5632), // ALi defaults
|
||
.driver_info = (unsigned long) &ali_m5632_info,
|
||
},
|
||
{
|
||
USB_DEVICE (0x182d,0x207c), // SiteCom CN-124
|
||
.driver_info = (unsigned long) &ali_m5632_info,
|
||
},
|
||
#endif
|
||
|
||
#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_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_KC2190
|
||
{
|
||
USB_DEVICE (0x050f, 0x0190), // KC-190
|
||
.driver_info = (unsigned long) &kc2190_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.
|
||
*
|
||
* PXA25x or PXA210 ... these use a "usb-eth" driver much like
|
||
* the sa1100 one, but hardware uses different endpoint numbers.
|
||
*
|
||
* Or the Linux "Ethernet" gadget on hardware that can't talk
|
||
* CDC Ethernet (e.g., no altsettings), in either of two modes:
|
||
* - acting just like the old "usb-eth" firmware, though
|
||
* the implementation is different
|
||
* - supporting RNDIS as the first/default configuration for
|
||
* MS-Windows interop; Linux needs to use the other config
|
||
*/
|
||
{
|
||
// 1183 = 0x049F, both used as hex values?
|
||
// Compaq "Itsy" vendor/product id
|
||
USB_DEVICE (0x049F, 0x505A), // usb-eth, or compatible
|
||
.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,
|
||
}, {
|
||
USB_DEVICE (0x1286, 0x8001), // "blob" bootloader
|
||
.driver_info = (unsigned long) &blob_info,
|
||
}, {
|
||
// Linux Ethernet/RNDIS gadget, mostly on PXA, second config
|
||
// e.g. Gumstix, current OpenZaurus, ... or anything else
|
||
// that just enables this gadget option.
|
||
USB_DEVICE (0x0525, 0xa4a2),
|
||
.driver_info = (unsigned long) &linuxdev_info,
|
||
},
|
||
#endif
|
||
|
||
{ }, // END
|
||
};
|
||
MODULE_DEVICE_TABLE(usb, products);
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
static struct usb_driver cdc_subset_driver = {
|
||
.name = "cdc_subset",
|
||
.probe = usbnet_probe,
|
||
.suspend = usbnet_suspend,
|
||
.resume = usbnet_resume,
|
||
.disconnect = usbnet_disconnect,
|
||
.id_table = products,
|
||
};
|
||
|
||
static int __init cdc_subset_init(void)
|
||
{
|
||
return usb_register(&cdc_subset_driver);
|
||
}
|
||
module_init(cdc_subset_init);
|
||
|
||
static void __exit cdc_subset_exit(void)
|
||
{
|
||
usb_deregister(&cdc_subset_driver);
|
||
}
|
||
module_exit(cdc_subset_exit);
|
||
|
||
MODULE_AUTHOR("David Brownell");
|
||
MODULE_DESCRIPTION("Simple 'CDC Subset' USB networking links");
|
||
MODULE_LICENSE("GPL");
|