1 files changed, 344 insertions, 0 deletions

diff --git a/drivers/net/usb/cdc_subset.c b/drivers/net/usb/cdc_subset.c
new file mode 100644
index 000000000000..bc62b012602b
--- /dev/null
+++ b/drivers/net/usb/cdc_subset.c
@@ -0,0 +1,344 @@
+/*
+ * 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 "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
+#error 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,
+}, {
+        // Linux Ethernet/RNDIS gadget on pxa210/25x/26x, second config
+        // e.g. Gumstix, current OpenZaurus, ...
+        USB_DEVICE_VER (0x0525, 0xa4a2, 0x0203, 0x0203),
+        .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");