zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/usb/gadget/ether.c b/ap/os/linux/linux-3.4.x/drivers/usb/gadget/ether.c
new file mode 100644
index 0000000..a28f6ff
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/usb/gadget/ether.c
@@ -0,0 +1,413 @@
+/*
+ * ether.c -- Ethernet gadget driver, with CDC and non-CDC options
+ *
+ * Copyright (C) 2003-2005,2008 David Brownell
+ * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * 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.
+ */
+
+/* #define VERBOSE_DEBUG */
+
+#include <linux/kernel.h>
+#include <linux/utsname.h>
+
+
+#if defined USB_ETH_RNDIS
+# undef USB_ETH_RNDIS
+#endif
+#ifdef CONFIG_USB_ETH_RNDIS
+# define USB_ETH_RNDIS y
+#endif
+
+#include "u_ether.h"
+
+
+/*
+ * Ethernet gadget driver -- with CDC and non-CDC options
+ * Builds on hardware support for a full duplex link.
+ *
+ * CDC Ethernet is the standard USB solution for sending Ethernet frames
+ * using USB. Real hardware tends to use the same framing protocol but look
+ * different for control features. This driver strongly prefers to use
+ * this USB-IF standard as its open-systems interoperability solution;
+ * most host side USB stacks (except from Microsoft) support it.
+ *
+ * This is sometimes called "CDC ECM" (Ethernet Control Model) to support
+ * TLA-soup. "CDC ACM" (Abstract Control Model) is for modems, and a new
+ * "CDC EEM" (Ethernet Emulation Model) is starting to spread.
+ *
+ * There's some hardware that can't talk CDC ECM. We make that hardware
+ * implement a "minimalist" vendor-agnostic CDC core: same framing, but
+ * link-level setup only requires activating the configuration. Only the
+ * endpoint descriptors, and product/vendor IDs, are relevant; no control
+ * operations are available. Linux supports it, but other host operating
+ * systems may not. (This is a subset of CDC Ethernet.)
+ *
+ * It turns out that if you add a few descriptors to that "CDC Subset",
+ * (Windows) host side drivers from MCCI can treat it as one submode of
+ * a proprietary scheme called "SAFE" ... without needing to know about
+ * specific product/vendor IDs. So we do that, making it easier to use
+ * those MS-Windows drivers. Those added descriptors make it resemble a
+ * CDC MDLM device, but they don't change device behavior at all. (See
+ * MCCI Engineering report 950198 "SAFE Networking Functions".)
+ *
+ * A third option is also in use. Rather than CDC Ethernet, or something
+ * simpler, Microsoft pushes their own approach: RNDIS. The published
+ * RNDIS specs are ambiguous and appear to be incomplete, and are also
+ * needlessly complex. They borrow more from CDC ACM than CDC ECM.
+ */
+
+#define DRIVER_DESC "Ethernet Gadget"
+#define DRIVER_VERSION "Memorial Day 2008"
+
+#ifdef USB_ETH_RNDIS
+#define PREFIX "RNDIS/"
+#else
+#define PREFIX ""
+#endif
+
+/*
+ * This driver aims for interoperability by using CDC ECM unless
+ *
+ * can_support_ecm()
+ *
+ * returns false, in which case it supports the CDC Subset. By default,
+ * that returns true; most hardware has no problems with CDC ECM, that's
+ * a good default. Previous versions of this driver had no default; this
+ * version changes that, removing overhead for new controller support.
+ *
+ * IF YOUR HARDWARE CAN'T SUPPORT CDC ECM, UPDATE THAT ROUTINE!
+ */
+
+static inline bool has_rndis(void)
+{
+#ifdef USB_ETH_RNDIS
+ return true;
+#else
+ return false;
+#endif
+}
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Kbuild is not very cooperative with respect to linking separately
+ * compiled library objects into one module. So for now we won't use
+ * separate compilation ... ensuring init/exit sections work to shrink
+ * the runtime footprint, and giving us at least some parts of what
+ * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
+ */
+#include "composite.c"
+#include "usbstring.c"
+#include "config.c"
+#include "epautoconf.c"
+
+#include "f_ecm.c"
+#include "f_subset.c"
+#ifdef USB_ETH_RNDIS
+#include "f_rndis.c"
+#include "rndis.c"
+#endif
+#include "f_eem.c"
+#include "u_ether.c"
+
+/*-------------------------------------------------------------------------*/
+
+/* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
+ * Instead: allocate your own, using normal USB-IF procedures.
+ */
+
+/* Thanks to NetChip Technologies for donating this product ID.
+ * It's for devices with only CDC Ethernet configurations.
+ */
+#define CDC_VENDOR_NUM 0x0525 /* NetChip */
+#define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */
+
+/* For hardware that can't talk CDC, we use the same vendor ID that
+ * ARM Linux has used for ethernet-over-usb, both with sa1100 and
+ * with pxa250. We're protocol-compatible, if the host-side drivers
+ * use the endpoint descriptors. bcdDevice (version) is nonzero, so
+ * drivers that need to hard-wire endpoint numbers have a hook.
+ *
+ * The protocol is a minimal subset of CDC Ether, which works on any bulk
+ * hardware that's not deeply broken ... even on hardware that can't talk
+ * RNDIS (like SA-1100, with no interrupt endpoint, or anything that
+ * doesn't handle control-OUT).
+ */
+#define SIMPLE_VENDOR_NUM 0x049f
+#define SIMPLE_PRODUCT_NUM 0x505a
+
+/* For hardware that can talk RNDIS and either of the above protocols,
+ * use this ID ... the windows INF files will know it. Unless it's
+ * used with CDC Ethernet, Linux 2.4 hosts will need updates to choose
+ * the non-RNDIS configuration.
+ */
+#define RNDIS_VENDOR_NUM 0x0525 /* NetChip */
+#define RNDIS_PRODUCT_NUM 0xa4a2 /* Ethernet/RNDIS Gadget */
+
+/* For EEM gadgets */
+#define EEM_VENDOR_NUM 0x1d6b /* Linux Foundation */
+#define EEM_PRODUCT_NUM 0x0102 /* EEM Gadget */
+
+/*-------------------------------------------------------------------------*/
+
+static struct usb_device_descriptor device_desc = {
+ .bLength = sizeof device_desc,
+ .bDescriptorType = USB_DT_DEVICE,
+
+ .bcdUSB = cpu_to_le16 (0x0200),
+
+ .bDeviceClass = USB_CLASS_COMM,
+ .bDeviceSubClass = 0,
+ .bDeviceProtocol = 0,
+ /* .bMaxPacketSize0 = f(hardware) */
+
+ /* Vendor and product id defaults change according to what configs
+ * we support. (As does bNumConfigurations.) These values can
+ * also be overridden by module parameters.
+ */
+ .idVendor = cpu_to_le16 (CDC_VENDOR_NUM),
+ .idProduct = cpu_to_le16 (CDC_PRODUCT_NUM),
+ /* .bcdDevice = f(hardware) */
+ /* .iManufacturer = DYNAMIC */
+ /* .iProduct = DYNAMIC */
+ /* NO SERIAL NUMBER */
+ .bNumConfigurations = 1,
+};
+
+static struct usb_otg_descriptor otg_descriptor = {
+ .bLength = sizeof otg_descriptor,
+ .bDescriptorType = USB_DT_OTG,
+
+ /* REVISIT SRP-only hardware is possible, although
+ * it would not be called "OTG" ...
+ */
+ .bmAttributes = USB_OTG_SRP | USB_OTG_HNP,
+};
+
+static const struct usb_descriptor_header *otg_desc[] = {
+ (struct usb_descriptor_header *) &otg_descriptor,
+ NULL,
+};
+
+
+/* string IDs are assigned dynamically */
+
+#define STRING_MANUFACTURER_IDX 0
+#define STRING_PRODUCT_IDX 1
+
+static char manufacturer[50];
+
+static struct usb_string strings_dev[] = {
+ [STRING_MANUFACTURER_IDX].s = manufacturer,
+ [STRING_PRODUCT_IDX].s = PREFIX DRIVER_DESC,
+ { } /* end of list */
+};
+
+static struct usb_gadget_strings stringtab_dev = {
+ .language = 0x0409, /* en-us */
+ .strings = strings_dev,
+};
+
+static struct usb_gadget_strings *dev_strings[] = {
+ &stringtab_dev,
+ NULL,
+};
+
+static u8 hostaddr[ETH_ALEN];
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * We may not have an RNDIS configuration, but if we do it needs to be
+ * the first one present. That's to make Microsoft's drivers happy,
+ * and to follow DOCSIS 1.0 (cable modem standard).
+ */
+static int __init rndis_do_config(struct usb_configuration *c)
+{
+ /* FIXME alloc iConfiguration string, set it in c->strings */
+
+ if (gadget_is_otg(c->cdev->gadget)) {
+ c->descriptors = otg_desc;
+ c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
+ }
+
+ return rndis_bind_config(c, hostaddr);
+}
+
+static struct usb_configuration rndis_config_driver = {
+ .label = "RNDIS",
+ .bConfigurationValue = 2,
+ /* .iConfiguration = DYNAMIC */
+ .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
+};
+
+/*-------------------------------------------------------------------------*/
+
+#ifdef CONFIG_USB_ETH_EEM
+static bool use_eem = 1;
+#else
+static bool use_eem;
+#endif
+module_param(use_eem, bool, 0);
+MODULE_PARM_DESC(use_eem, "use CDC EEM mode");
+
+/*
+ * We _always_ have an ECM, CDC Subset, or EEM configuration.
+ */
+static int __init eth_do_config(struct usb_configuration *c)
+{
+ /* FIXME alloc iConfiguration string, set it in c->strings */
+
+ if (gadget_is_otg(c->cdev->gadget)) {
+ c->descriptors = otg_desc;
+ c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
+ }
+
+ if (use_eem)
+ return eem_bind_config(c);
+ else if (can_support_ecm(c->cdev->gadget))
+ return ecm_bind_config(c, hostaddr);
+ else
+ return geth_bind_config(c, hostaddr);
+}
+
+static struct usb_configuration eth_config_driver = {
+ /* .label = f(hardware) */
+ .bConfigurationValue = 1,
+ /* .iConfiguration = DYNAMIC */
+ .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int __init eth_bind(struct usb_composite_dev *cdev)
+{
+ int gcnum;
+ struct usb_gadget *gadget = cdev->gadget;
+ int status;
+
+ /* set up network link layer */
+ status = gether_setup(cdev->gadget, hostaddr);
+ if (status < 0)
+ return status;
+
+ /* set up main config label and device descriptor */
+ if (use_eem) {
+ /* EEM */
+ eth_config_driver.label = "CDC Ethernet (EEM)";
+ device_desc.idVendor = cpu_to_le16(EEM_VENDOR_NUM);
+ device_desc.idProduct = cpu_to_le16(EEM_PRODUCT_NUM);
+ } else if (can_support_ecm(cdev->gadget)) {
+ /* ECM */
+ eth_config_driver.label = "CDC Ethernet (ECM)";
+ } else {
+ /* CDC Subset */
+ eth_config_driver.label = "CDC Subset/SAFE";
+
+ device_desc.idVendor = cpu_to_le16(SIMPLE_VENDOR_NUM);
+ device_desc.idProduct = cpu_to_le16(SIMPLE_PRODUCT_NUM);
+ if (!has_rndis())
+ device_desc.bDeviceClass = USB_CLASS_VENDOR_SPEC;
+ }
+
+ if (has_rndis()) {
+ /* RNDIS plus ECM-or-Subset */
+ device_desc.idVendor = cpu_to_le16(RNDIS_VENDOR_NUM);
+ device_desc.idProduct = cpu_to_le16(RNDIS_PRODUCT_NUM);
+ device_desc.bNumConfigurations = 2;
+ }
+
+ gcnum = usb_gadget_controller_number(gadget);
+ if (gcnum >= 0)
+ device_desc.bcdDevice = cpu_to_le16(0x0300 | gcnum);
+ else {
+ /* We assume that can_support_ecm() tells the truth;
+ * but if the controller isn't recognized at all then
+ * that assumption is a bit more likely to be wrong.
+ */
+ dev_warn(&gadget->dev,
+ "controller '%s' not recognized; trying %s\n",
+ gadget->name,
+ eth_config_driver.label);
+ device_desc.bcdDevice =
+ cpu_to_le16(0x0300 | 0x0099);
+ }
+
+
+ /* Allocate string descriptor numbers ... note that string
+ * contents can be overridden by the composite_dev glue.
+ */
+
+ /* device descriptor strings: manufacturer, product */
+ snprintf(manufacturer, sizeof manufacturer, "%s %s with %s",
+ init_utsname()->sysname, init_utsname()->release,
+ gadget->name);
+ status = usb_string_id(cdev);
+ if (status < 0)
+ goto fail;
+ strings_dev[STRING_MANUFACTURER_IDX].id = status;
+ device_desc.iManufacturer = status;
+
+ status = usb_string_id(cdev);
+ if (status < 0)
+ goto fail;
+ strings_dev[STRING_PRODUCT_IDX].id = status;
+ device_desc.iProduct = status;
+
+ /* register our configuration(s); RNDIS first, if it's used */
+ if (has_rndis()) {
+ status = usb_add_config(cdev, &rndis_config_driver,
+ rndis_do_config);
+ if (status < 0)
+ goto fail;
+ }
+
+ status = usb_add_config(cdev, ð_config_driver, eth_do_config);
+ if (status < 0)
+ goto fail;
+
+ dev_info(&gadget->dev, "%s, version: " DRIVER_VERSION "\n",
+ DRIVER_DESC);
+
+ return 0;
+
+fail:
+ gether_cleanup();
+ return status;
+}
+
+static int __exit eth_unbind(struct usb_composite_dev *cdev)
+{
+ gether_cleanup();
+ return 0;
+}
+
+static struct usb_composite_driver eth_driver = {
+ .name = "g_ether",
+ .dev = &device_desc,
+ .strings = dev_strings,
+ .max_speed = USB_SPEED_SUPER,
+ .unbind = __exit_p(eth_unbind),
+};
+
+MODULE_DESCRIPTION(PREFIX DRIVER_DESC);
+MODULE_AUTHOR("David Brownell, Benedikt Spanger");
+MODULE_LICENSE("GPL");
+
+static int __init init(void)
+{
+ return usb_composite_probe(ð_driver, eth_bind);
+}
+module_init(init);
+
+static void __exit cleanup(void)
+{
+ usb_composite_unregister(ð_driver);
+}
+module_exit(cleanup);