zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/usb/gadget/zero.c b/ap/os/linux/linux-3.4.x/drivers/usb/gadget/zero.c
new file mode 100644
index 0000000..31d3483
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/usb/gadget/zero.c
@@ -0,0 +1,353 @@
+/*
+ * zero.c -- Gadget Zero, for USB development
+ *
+ * Copyright (C) 2003-2008 David Brownell
+ * Copyright (C) 2008 by 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.
+ */
+
+
+/*
+ * Gadget Zero only needs two bulk endpoints, and is an example of how you
+ * can write a hardware-agnostic gadget driver running inside a USB device.
+ * Some hardware details are visible, but don't affect most of the driver.
+ *
+ * Use it with the Linux host/master side "usbtest" driver to get a basic
+ * functional test of your device-side usb stack, or with "usb-skeleton".
+ *
+ * It supports two similar configurations. One sinks whatever the usb host
+ * writes, and in return sources zeroes. The other loops whatever the host
+ * writes back, so the host can read it.
+ *
+ * Many drivers will only have one configuration, letting them be much
+ * simpler if they also don't support high speed operation (like this
+ * driver does).
+ *
+ * Why is *this* driver using two configurations, rather than setting up
+ * two interfaces with different functions? To help verify that multiple
+ * configuration infrastucture is working correctly; also, so that it can
+ * work with low capability USB controllers without four bulk endpoints.
+ */
+
+/*
+ * driver assumes self-powered hardware, and
+ * has no way for users to trigger remote wakeup.
+ */
+
+/* #define VERBOSE_DEBUG */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/utsname.h>
+#include <linux/device.h>
+
+#include "g_zero.h"
+#include "gadget_chips.h"
+
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * 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_sourcesink.c"
+#include "f_loopback.c"
+
+/*-------------------------------------------------------------------------*/
+
+#define DRIVER_VERSION "Cinco de Mayo 2008"
+
+static const char longname[] = "Gadget Zero";
+
+unsigned buflen = 4096;
+module_param(buflen, uint, 0);
+
+/*
+ * Normally the "loopback" configuration is second (index 1) so
+ * it's not the default. Here's where to change that order, to
+ * work better with hosts where config changes are problematic or
+ * controllers (like original superh) that only support one config.
+ */
+static bool loopdefault = 0;
+module_param(loopdefault, bool, S_IRUGO|S_IWUSR);
+
+/*-------------------------------------------------------------------------*/
+
+/* Thanks to NetChip Technologies for donating this product ID.
+ *
+ * DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
+ * Instead: allocate your own, using normal USB-IF procedures.
+ */
+#ifndef CONFIG_USB_ZERO_HNPTEST
+#define DRIVER_VENDOR_NUM 0x0525 /* NetChip */
+#define DRIVER_PRODUCT_NUM 0xa4a0 /* Linux-USB "Gadget Zero" */
+#define DEFAULT_AUTORESUME 0
+#else
+#define DRIVER_VENDOR_NUM 0x1a0a /* OTG test device IDs */
+#define DRIVER_PRODUCT_NUM 0xbadd
+#define DEFAULT_AUTORESUME 5
+#endif
+
+/* If the optional "autoresume" mode is enabled, it provides good
+ * functional coverage for the "USBCV" test harness from USB-IF.
+ * It's always set if OTG mode is enabled.
+ */
+unsigned autoresume = DEFAULT_AUTORESUME;
+module_param(autoresume, uint, S_IRUGO);
+MODULE_PARM_DESC(autoresume, "zero, or seconds before remote wakeup");
+
+/*-------------------------------------------------------------------------*/
+
+static struct usb_device_descriptor device_desc = {
+ .bLength = sizeof device_desc,
+ .bDescriptorType = USB_DT_DEVICE,
+
+ .bcdUSB = cpu_to_le16(0x0200),
+ .bDeviceClass = USB_CLASS_VENDOR_SPEC,
+
+ .idVendor = cpu_to_le16(DRIVER_VENDOR_NUM),
+ .idProduct = cpu_to_le16(DRIVER_PRODUCT_NUM),
+ .bNumConfigurations = 2,
+};
+
+#ifdef CONFIG_USB_OTG
+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,
+};
+
+const struct usb_descriptor_header *otg_desc[] = {
+ (struct usb_descriptor_header *) &otg_descriptor,
+ NULL,
+};
+#endif
+
+/* string IDs are assigned dynamically */
+
+#define STRING_MANUFACTURER_IDX 0
+#define STRING_PRODUCT_IDX 1
+#define STRING_SERIAL_IDX 2
+
+static char manufacturer[50];
+
+/* default serial number takes at least two packets */
+static char serial[] = "0123456789.0123456789.0123456789";
+
+static struct usb_string strings_dev[] = {
+ [STRING_MANUFACTURER_IDX].s = manufacturer,
+ [STRING_PRODUCT_IDX].s = longname,
+ [STRING_SERIAL_IDX].s = serial,
+ { } /* 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,
+};
+
+/*-------------------------------------------------------------------------*/
+
+struct usb_request *alloc_ep_req(struct usb_ep *ep)
+{
+ struct usb_request *req;
+
+ req = usb_ep_alloc_request(ep, GFP_ATOMIC);
+ if (req) {
+ req->length = buflen;
+ req->buf = kmalloc(buflen, GFP_ATOMIC);
+ if (!req->buf) {
+ usb_ep_free_request(ep, req);
+ req = NULL;
+ }
+ }
+ return req;
+}
+
+void free_ep_req(struct usb_ep *ep, struct usb_request *req)
+{
+ kfree(req->buf);
+ usb_ep_free_request(ep, req);
+}
+
+static void disable_ep(struct usb_composite_dev *cdev, struct usb_ep *ep)
+{
+ int value;
+
+ if (ep->driver_data) {
+ value = usb_ep_disable(ep);
+ if (value < 0)
+ DBG(cdev, "disable %s --> %d\n",
+ ep->name, value);
+ ep->driver_data = NULL;
+ }
+}
+
+void disable_endpoints(struct usb_composite_dev *cdev,
+ struct usb_ep *in, struct usb_ep *out)
+{
+ disable_ep(cdev, in);
+ disable_ep(cdev, out);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static struct timer_list autoresume_timer;
+
+static void zero_autoresume(unsigned long _c)
+{
+ struct usb_composite_dev *cdev = (void *)_c;
+ struct usb_gadget *g = cdev->gadget;
+
+ /* unconfigured devices can't issue wakeups */
+ if (!cdev->config)
+ return;
+
+ /* Normally the host would be woken up for something
+ * more significant than just a timer firing; likely
+ * because of some direct user request.
+ */
+ if (g->speed != USB_SPEED_UNKNOWN) {
+ int status = usb_gadget_wakeup(g);
+ INFO(cdev, "%s --> %d\n", __func__, status);
+ }
+}
+
+static void zero_suspend(struct usb_composite_dev *cdev)
+{
+ if (cdev->gadget->speed == USB_SPEED_UNKNOWN)
+ return;
+
+ if (autoresume) {
+ mod_timer(&autoresume_timer, jiffies + (HZ * autoresume));
+ DBG(cdev, "suspend, wakeup in %d seconds\n", autoresume);
+ } else
+ DBG(cdev, "%s\n", __func__);
+}
+
+static void zero_resume(struct usb_composite_dev *cdev)
+{
+ DBG(cdev, "%s\n", __func__);
+ del_timer(&autoresume_timer);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int __init zero_bind(struct usb_composite_dev *cdev)
+{
+ int gcnum;
+ struct usb_gadget *gadget = cdev->gadget;
+ int id;
+
+ /* Allocate string descriptor numbers ... note that string
+ * contents can be overridden by the composite_dev glue.
+ */
+ id = usb_string_id(cdev);
+ if (id < 0)
+ return id;
+ strings_dev[STRING_MANUFACTURER_IDX].id = id;
+ device_desc.iManufacturer = id;
+
+ id = usb_string_id(cdev);
+ if (id < 0)
+ return id;
+ strings_dev[STRING_PRODUCT_IDX].id = id;
+ device_desc.iProduct = id;
+
+ id = usb_string_id(cdev);
+ if (id < 0)
+ return id;
+ strings_dev[STRING_SERIAL_IDX].id = id;
+ device_desc.iSerialNumber = id;
+
+ setup_timer(&autoresume_timer, zero_autoresume, (unsigned long) cdev);
+
+ /* Register primary, then secondary configuration. Note that
+ * SH3 only allows one config...
+ */
+ if (loopdefault) {
+ loopback_add(cdev, autoresume != 0);
+ sourcesink_add(cdev, autoresume != 0);
+ } else {
+ sourcesink_add(cdev, autoresume != 0);
+ loopback_add(cdev, autoresume != 0);
+ }
+
+ gcnum = usb_gadget_controller_number(gadget);
+ if (gcnum >= 0)
+ device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum);
+ else {
+ /* gadget zero is so simple (for now, no altsettings) that
+ * it SHOULD NOT have problems with bulk-capable hardware.
+ * so just warn about unrcognized controllers -- don't panic.
+ *
+ * things like configuration and altsetting numbering
+ * can need hardware-specific attention though.
+ */
+ pr_warning("%s: controller '%s' not recognized\n",
+ longname, gadget->name);
+ device_desc.bcdDevice = cpu_to_le16(0x9999);
+ }
+
+
+ INFO(cdev, "%s, version: " DRIVER_VERSION "\n", longname);
+
+ snprintf(manufacturer, sizeof manufacturer, "%s %s with %s",
+ init_utsname()->sysname, init_utsname()->release,
+ gadget->name);
+
+ return 0;
+}
+
+static int zero_unbind(struct usb_composite_dev *cdev)
+{
+ del_timer_sync(&autoresume_timer);
+ return 0;
+}
+
+static struct usb_composite_driver zero_driver = {
+ .name = "zero",
+ .dev = &device_desc,
+ .strings = dev_strings,
+ .max_speed = USB_SPEED_SUPER,
+ .unbind = zero_unbind,
+ .suspend = zero_suspend,
+ .resume = zero_resume,
+};
+
+MODULE_AUTHOR("David Brownell");
+MODULE_LICENSE("GPL");
+
+static int __init init(void)
+{
+ return usb_composite_probe(&zero_driver, zero_bind);
+}
+module_init(init);
+
+static void __exit cleanup(void)
+{
+ usb_composite_unregister(&zero_driver);
+}
+module_exit(cleanup);