+++ /dev/null
-From 03e39e8f663c896dac11e87d96e8cb0292520e36 Mon Sep 17 00:00:00 2001
-From: Mike Lockwood <lockwood@android.com>
-Date: Tue, 2 Dec 2008 22:01:33 -0500
-Subject: [PATCH 101/134] android_usb: Composite USB gadget driver for android.
-
-Signed-off-by: Mike Lockwood <lockwood@android.com>
-
-USB: android gadget: add remote wakeup attribute to android function
-
-Add remote wakeup attribute to configuration descriptor of android
-function to advertise remote wakeup capability to host
-
-Acked-by: Allam, Suresh Reddy <sallam@qualcomm.com>
-
-Signed-off-by: Mike Lockwood <lockwood@android.com>
-
-usb gadget: link fixes for android composite gadget
-
-Signed-off-by: Mike Lockwood <lockwood@android.com>
-
-usb gadget: Fix null pointer errors in android composite driver
-
-Signed-off-by: Mike Lockwood <lockwood@android.com>
----
- drivers/usb/gadget/Kconfig | 8 +
- drivers/usb/gadget/Makefile | 2 +
- drivers/usb/gadget/android.c | 345 +++++
- drivers/usb/gadget/f_adb.c | 668 ++++++++
- drivers/usb/gadget/f_adb.h | 25 +
- drivers/usb/gadget/f_mass_storage.c | 2906 +++++++++++++++++++++++++++++++++++
- drivers/usb/gadget/f_mass_storage.h | 52 +
- include/linux/usb/android.h | 40 +
- 8 files changed, 4046 insertions(+), 0 deletions(-)
- create mode 100644 drivers/usb/gadget/android.c
- create mode 100644 drivers/usb/gadget/f_adb.c
- create mode 100644 drivers/usb/gadget/f_adb.h
- create mode 100644 drivers/usb/gadget/f_mass_storage.c
- create mode 100644 drivers/usb/gadget/f_mass_storage.h
- create mode 100644 include/linux/usb/android.h
-
---- a/drivers/usb/gadget/Kconfig
-+++ b/drivers/usb/gadget/Kconfig
-@@ -700,6 +700,14 @@ config USB_G_PRINTER
- For more information, see Documentation/usb/gadget_printer.txt
- which includes sample code for accessing the device file.
-
-+config USB_ANDROID
-+ tristate "Android Gadget"
-+ help
-+ The Android gadget provides mass storage and adb transport.
-+
-+ Say "y" to link the driver statically, or "m" to build a
-+ dynamically linked module called "g_android".
-+
- config USB_CDC_COMPOSITE
- tristate "CDC Composite Device (Ethernet and ACM)"
- depends on NET
---- a/drivers/usb/gadget/Makefile
-+++ b/drivers/usb/gadget/Makefile
-@@ -33,6 +33,7 @@ gadgetfs-objs := inode.o
- g_file_storage-objs := file_storage.o
- g_printer-objs := printer.o
- g_cdc-objs := cdc2.o
-+g_android-objs := android.o f_adb.o f_mass_storage.o
-
- obj-$(CONFIG_USB_ZERO) += g_zero.o
- obj-$(CONFIG_USB_ETH) += g_ether.o
-@@ -42,4 +43,5 @@ obj-$(CONFIG_USB_G_SERIAL) += g_serial.o
- obj-$(CONFIG_USB_G_PRINTER) += g_printer.o
- obj-$(CONFIG_USB_MIDI_GADGET) += g_midi.o
- obj-$(CONFIG_USB_CDC_COMPOSITE) += g_cdc.o
-+obj-$(CONFIG_USB_ANDROID) += g_android.o
-
---- /dev/null
-+++ b/drivers/usb/gadget/android.c
-@@ -0,0 +1,345 @@
-+/*
-+ * Gadget Driver for Android
-+ *
-+ * Copyright (C) 2008 Google, Inc.
-+ * Author: Mike Lockwood <lockwood@android.com>
-+ *
-+ * This software is licensed under the terms of the GNU General Public
-+ * License version 2, as published by the Free Software Foundation, and
-+ * may be copied, distributed, and modified under those terms.
-+ *
-+ * 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.
-+ *
-+ */
-+
-+/* #define DEBUG */
-+/* #define VERBOSE_DEBUG */
-+
-+#include <linux/init.h>
-+#include <linux/module.h>
-+#include <linux/fs.h>
-+
-+#include <linux/delay.h>
-+#include <linux/kernel.h>
-+#include <linux/utsname.h>
-+#include <linux/miscdevice.h>
-+#include <linux/platform_device.h>
-+
-+#include <linux/usb/android.h>
-+#include <linux/usb/ch9.h>
-+#include <linux/usb/composite.h>
-+#include <linux/usb/gadget.h>
-+
-+#include "f_mass_storage.h"
-+#include "f_adb.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 "usbstring.c"
-+#include "config.c"
-+#include "epautoconf.c"
-+#include "composite.c"
-+
-+MODULE_AUTHOR("Mike Lockwood");
-+MODULE_DESCRIPTION("Android Composite USB Driver");
-+MODULE_LICENSE("GPL");
-+MODULE_VERSION("1.0");
-+
-+static const char longname[] = "Gadget Android";
-+
-+/* Default vendor and product IDs, overridden by platform data */
-+#define VENDOR_ID 0x18D1
-+#define PRODUCT_ID 0x0001
-+#define ADB_PRODUCT_ID 0x0002
-+
-+struct android_dev {
-+ struct usb_gadget *gadget;
-+ struct usb_composite_dev *cdev;
-+
-+ int product_id;
-+ int adb_product_id;
-+ int version;
-+
-+ int adb_enabled;
-+ int nluns;
-+};
-+
-+static atomic_t adb_enable_excl;
-+static struct android_dev *_android_dev;
-+
-+/* string IDs are assigned dynamically */
-+
-+#define STRING_MANUFACTURER_IDX 0
-+#define STRING_PRODUCT_IDX 1
-+#define STRING_SERIAL_IDX 2
-+
-+/* String Table */
-+static struct usb_string strings_dev[] = {
-+ /* These dummy values should be overridden by platform data */
-+ [STRING_MANUFACTURER_IDX].s = "Android",
-+ [STRING_PRODUCT_IDX].s = "Android",
-+ [STRING_SERIAL_IDX].s = "0123456789ABCDEF",
-+ { } /* 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 struct usb_device_descriptor device_desc = {
-+ .bLength = sizeof(device_desc),
-+ .bDescriptorType = USB_DT_DEVICE,
-+ .bcdUSB = __constant_cpu_to_le16(0x0200),
-+ .bDeviceClass = USB_CLASS_PER_INTERFACE,
-+ .idVendor = __constant_cpu_to_le16(VENDOR_ID),
-+ .idProduct = __constant_cpu_to_le16(PRODUCT_ID),
-+ .bcdDevice = __constant_cpu_to_le16(0xffff),
-+ .bNumConfigurations = 1,
-+};
-+
-+static int __init android_bind_config(struct usb_configuration *c)
-+{
-+ struct android_dev *dev = _android_dev;
-+ int ret;
-+ printk(KERN_DEBUG "android_bind_config\n");
-+
-+ ret = mass_storage_function_add(dev->cdev, c, dev->nluns);
-+ if (ret)
-+ return ret;
-+ return adb_function_add(dev->cdev, c);
-+}
-+
-+static struct usb_configuration android_config_driver = {
-+ .label = "android",
-+ .bind = android_bind_config,
-+ .bConfigurationValue = 1,
-+ .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
-+ .bMaxPower = 0x80, /* 250ma */
-+};
-+
-+static int __init android_bind(struct usb_composite_dev *cdev)
-+{
-+ struct android_dev *dev = _android_dev;
-+ struct usb_gadget *gadget = cdev->gadget;
-+ int gcnum;
-+ int id;
-+ int ret;
-+
-+ printk(KERN_INFO "android_bind\n");
-+
-+ /* 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;
-+
-+ if (gadget->ops->wakeup)
-+ android_config_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
-+
-+ /* register our configuration */
-+ ret = usb_add_config(cdev, &android_config_driver);
-+ if (ret) {
-+ printk(KERN_ERR "usb_add_config failed\n");
-+ return ret;
-+ }
-+
-+ 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 = __constant_cpu_to_le16(0x9999);
-+ }
-+
-+ usb_gadget_set_selfpowered(gadget);
-+ dev->cdev = cdev;
-+
-+ return 0;
-+}
-+
-+static struct usb_composite_driver android_usb_driver = {
-+ .name = "android_usb",
-+ .dev = &device_desc,
-+ .strings = dev_strings,
-+ .bind = android_bind,
-+};
-+
-+static void enable_adb(struct android_dev *dev, int enable)
-+{
-+ if (enable != dev->adb_enabled) {
-+ dev->adb_enabled = enable;
-+ adb_function_enable(enable);
-+
-+ /* set product ID to the appropriate value */
-+ if (enable)
-+ device_desc.idProduct =
-+ __constant_cpu_to_le16(dev->adb_product_id);
-+ else
-+ device_desc.idProduct =
-+ __constant_cpu_to_le16(dev->product_id);
-+ if (dev->cdev)
-+ dev->cdev->desc.idProduct = device_desc.idProduct;
-+
-+ /* force reenumeration */
-+ if (dev->cdev && dev->cdev->gadget &&
-+ dev->cdev->gadget->speed != USB_SPEED_UNKNOWN) {
-+ usb_gadget_disconnect(dev->cdev->gadget);
-+ msleep(10);
-+ usb_gadget_connect(dev->cdev->gadget);
-+ }
-+ }
-+}
-+
-+static int adb_enable_open(struct inode *ip, struct file *fp)
-+{
-+ if (atomic_inc_return(&adb_enable_excl) != 1) {
-+ atomic_dec(&adb_enable_excl);
-+ return -EBUSY;
-+ }
-+
-+ printk(KERN_INFO "enabling adb\n");
-+ enable_adb(_android_dev, 1);
-+
-+ return 0;
-+}
-+
-+static int adb_enable_release(struct inode *ip, struct file *fp)
-+{
-+ printk(KERN_INFO "disabling adb\n");
-+ enable_adb(_android_dev, 0);
-+ atomic_dec(&adb_enable_excl);
-+ return 0;
-+}
-+
-+static struct file_operations adb_enable_fops = {
-+ .owner = THIS_MODULE,
-+ .open = adb_enable_open,
-+ .release = adb_enable_release,
-+};
-+
-+static struct miscdevice adb_enable_device = {
-+ .minor = MISC_DYNAMIC_MINOR,
-+ .name = "android_adb_enable",
-+ .fops = &adb_enable_fops,
-+};
-+
-+static int __init android_probe(struct platform_device *pdev)
-+{
-+ struct android_usb_platform_data *pdata = pdev->dev.platform_data;
-+ struct android_dev *dev = _android_dev;
-+
-+ printk(KERN_INFO "android_probe pdata: %p\n", pdata);
-+
-+ if (pdata) {
-+ if (pdata->vendor_id)
-+ device_desc.idVendor =
-+ __constant_cpu_to_le16(pdata->vendor_id);
-+ if (pdata->product_id) {
-+ dev->product_id = pdata->product_id;
-+ device_desc.idProduct =
-+ __constant_cpu_to_le16(pdata->product_id);
-+ }
-+ if (pdata->adb_product_id)
-+ dev->adb_product_id = pdata->adb_product_id;
-+ if (pdata->version)
-+ dev->version = pdata->version;
-+
-+ if (pdata->product_name)
-+ strings_dev[STRING_PRODUCT_IDX].s = pdata->product_name;
-+ if (pdata->manufacturer_name)
-+ strings_dev[STRING_MANUFACTURER_IDX].s =
-+ pdata->manufacturer_name;
-+ if (pdata->serial_number)
-+ strings_dev[STRING_SERIAL_IDX].s = pdata->serial_number;
-+ dev->nluns = pdata->nluns;
-+ }
-+
-+ return 0;
-+}
-+
-+static struct platform_driver android_platform_driver = {
-+ .driver = { .name = "android_usb", },
-+ .probe = android_probe,
-+};
-+
-+static int __init init(void)
-+{
-+ struct android_dev *dev;
-+ int ret;
-+
-+ printk(KERN_INFO "android init\n");
-+
-+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
-+ if (!dev)
-+ return -ENOMEM;
-+
-+ /* set default values, which should be overridden by platform data */
-+ dev->product_id = PRODUCT_ID;
-+ dev->adb_product_id = ADB_PRODUCT_ID;
-+ _android_dev = dev;
-+
-+ ret = platform_driver_register(&android_platform_driver);
-+ if (ret)
-+ return ret;
-+ ret = misc_register(&adb_enable_device);
-+ if (ret) {
-+ platform_driver_unregister(&android_platform_driver);
-+ return ret;
-+ }
-+ ret = usb_composite_register(&android_usb_driver);
-+ if (ret) {
-+ misc_deregister(&adb_enable_device);
-+ platform_driver_unregister(&android_platform_driver);
-+ }
-+ return ret;
-+}
-+module_init(init);
-+
-+static void __exit cleanup(void)
-+{
-+ usb_composite_unregister(&android_usb_driver);
-+ misc_deregister(&adb_enable_device);
-+ platform_driver_unregister(&android_platform_driver);
-+ kfree(_android_dev);
-+ _android_dev = NULL;
-+}
-+module_exit(cleanup);
---- /dev/null
-+++ b/drivers/usb/gadget/f_adb.c
-@@ -0,0 +1,668 @@
-+/*
-+ * Gadget Driver for Android ADB
-+ *
-+ * Copyright (C) 2008 Google, Inc.
-+ * Author: Mike Lockwood <lockwood@android.com>
-+ *
-+ * This software is licensed under the terms of the GNU General Public
-+ * License version 2, as published by the Free Software Foundation, and
-+ * may be copied, distributed, and modified under those terms.
-+ *
-+ * 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.
-+ *
-+ */
-+
-+/* #define DEBUG */
-+/* #define VERBOSE_DEBUG */
-+
-+#include <linux/module.h>
-+#include <linux/init.h>
-+#include <linux/poll.h>
-+#include <linux/delay.h>
-+#include <linux/wait.h>
-+#include <linux/err.h>
-+#include <linux/interrupt.h>
-+
-+#include <linux/types.h>
-+#include <linux/device.h>
-+#include <linux/miscdevice.h>
-+
-+#include <linux/usb/ch9.h>
-+#include <linux/usb/composite.h>
-+#include <linux/usb/gadget.h>
-+
-+#include "f_adb.h"
-+
-+#define BULK_BUFFER_SIZE 4096
-+
-+/* number of rx and tx requests to allocate */
-+#define RX_REQ_MAX 4
-+#define TX_REQ_MAX 4
-+
-+static const char shortname[] = "android_adb";
-+
-+struct adb_dev {
-+ struct usb_function function;
-+ struct usb_composite_dev *cdev;
-+ spinlock_t lock;
-+
-+ struct usb_ep *ep_in;
-+ struct usb_ep *ep_out;
-+
-+ int online;
-+ int error;
-+
-+ atomic_t read_excl;
-+ atomic_t write_excl;
-+ atomic_t open_excl;
-+
-+ struct list_head tx_idle;
-+ struct list_head rx_idle;
-+ struct list_head rx_done;
-+
-+ wait_queue_head_t read_wq;
-+ wait_queue_head_t write_wq;
-+
-+ /* the request we're currently reading from */
-+ struct usb_request *read_req;
-+ unsigned char *read_buf;
-+ unsigned read_count;
-+};
-+
-+static struct usb_interface_descriptor adb_interface_desc = {
-+ .bLength = USB_DT_INTERFACE_SIZE,
-+ .bDescriptorType = USB_DT_INTERFACE,
-+ .bInterfaceNumber = 0,
-+ .bNumEndpoints = 2,
-+ .bInterfaceClass = 0xFF,
-+ .bInterfaceSubClass = 0x42,
-+ .bInterfaceProtocol = 1,
-+};
-+
-+static struct usb_endpoint_descriptor adb_highspeed_in_desc = {
-+ .bLength = USB_DT_ENDPOINT_SIZE,
-+ .bDescriptorType = USB_DT_ENDPOINT,
-+ .bEndpointAddress = USB_DIR_IN,
-+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
-+ .wMaxPacketSize = __constant_cpu_to_le16(512),
-+};
-+
-+static struct usb_endpoint_descriptor adb_highspeed_out_desc = {
-+ .bLength = USB_DT_ENDPOINT_SIZE,
-+ .bDescriptorType = USB_DT_ENDPOINT,
-+ .bEndpointAddress = USB_DIR_OUT,
-+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
-+ .wMaxPacketSize = __constant_cpu_to_le16(512),
-+};
-+
-+static struct usb_endpoint_descriptor adb_fullspeed_in_desc = {
-+ .bLength = USB_DT_ENDPOINT_SIZE,
-+ .bDescriptorType = USB_DT_ENDPOINT,
-+ .bEndpointAddress = USB_DIR_IN,
-+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
-+};
-+
-+static struct usb_endpoint_descriptor adb_fullspeed_out_desc = {
-+ .bLength = USB_DT_ENDPOINT_SIZE,
-+ .bDescriptorType = USB_DT_ENDPOINT,
-+ .bEndpointAddress = USB_DIR_OUT,
-+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
-+};
-+
-+static struct usb_descriptor_header *fs_adb_descs[] = {
-+ (struct usb_descriptor_header *) &adb_interface_desc,
-+ (struct usb_descriptor_header *) &adb_fullspeed_in_desc,
-+ (struct usb_descriptor_header *) &adb_fullspeed_out_desc,
-+ NULL,
-+};
-+
-+static struct usb_descriptor_header *hs_adb_descs[] = {
-+ (struct usb_descriptor_header *) &adb_interface_desc,
-+ (struct usb_descriptor_header *) &adb_highspeed_in_desc,
-+ (struct usb_descriptor_header *) &adb_highspeed_out_desc,
-+ NULL,
-+};
-+
-+/* used when adb function is disabled */
-+static struct usb_descriptor_header *null_adb_descs[] = {
-+ NULL,
-+};
-+
-+
-+/* temporary variable used between adb_open() and adb_gadget_bind() */
-+static struct adb_dev *_adb_dev;
-+
-+static inline struct adb_dev *func_to_dev(struct usb_function *f)
-+{
-+ return container_of(f, struct adb_dev, function);
-+}
-+
-+
-+static struct usb_request *adb_request_new(struct usb_ep *ep, int buffer_size)
-+{
-+ struct usb_request *req = usb_ep_alloc_request(ep, GFP_KERNEL);
-+ if (!req)
-+ return NULL;
-+
-+ /* now allocate buffers for the requests */
-+ req->buf = kmalloc(buffer_size, GFP_KERNEL);
-+ if (!req->buf) {
-+ usb_ep_free_request(ep, req);
-+ return NULL;
-+ }
-+
-+ return req;
-+}
-+
-+static void adb_request_free(struct usb_request *req, struct usb_ep *ep)
-+{
-+ if (req) {
-+ kfree(req->buf);
-+ usb_ep_free_request(ep, req);
-+ }
-+}
-+
-+static inline int _lock(atomic_t *excl)
-+{
-+ if (atomic_inc_return(excl) == 1) {
-+ return 0;
-+ } else {
-+ atomic_dec(excl);
-+ return -1;
-+ }
-+}
-+
-+static inline void _unlock(atomic_t *excl)
-+{
-+ atomic_dec(excl);
-+}
-+
-+/* add a request to the tail of a list */
-+void req_put(struct adb_dev *dev, struct list_head *head,
-+ struct usb_request *req)
-+{
-+ unsigned long flags;
-+
-+ spin_lock_irqsave(&dev->lock, flags);
-+ list_add_tail(&req->list, head);
-+ spin_unlock_irqrestore(&dev->lock, flags);
-+}
-+
-+/* remove a request from the head of a list */
-+struct usb_request *req_get(struct adb_dev *dev, struct list_head *head)
-+{
-+ unsigned long flags;
-+ struct usb_request *req;
-+
-+ spin_lock_irqsave(&dev->lock, flags);
-+ if (list_empty(head)) {
-+ req = 0;
-+ } else {
-+ req = list_first_entry(head, struct usb_request, list);
-+ list_del(&req->list);
-+ }
-+ spin_unlock_irqrestore(&dev->lock, flags);
-+ return req;
-+}
-+
-+static void adb_complete_in(struct usb_ep *ep, struct usb_request *req)
-+{
-+ struct adb_dev *dev = _adb_dev;
-+
-+ if (req->status != 0)
-+ dev->error = 1;
-+
-+ req_put(dev, &dev->tx_idle, req);
-+
-+ wake_up(&dev->write_wq);
-+}
-+
-+static void adb_complete_out(struct usb_ep *ep, struct usb_request *req)
-+{
-+ struct adb_dev *dev = _adb_dev;
-+
-+ if (req->status != 0) {
-+ dev->error = 1;
-+ req_put(dev, &dev->rx_idle, req);
-+ } else {
-+ req_put(dev, &dev->rx_done, req);
-+ }
-+
-+ wake_up(&dev->read_wq);
-+}
-+
-+static int __init create_bulk_endpoints(struct adb_dev *dev,
-+ struct usb_endpoint_descriptor *in_desc,
-+ struct usb_endpoint_descriptor *out_desc)
-+{
-+ struct usb_composite_dev *cdev = dev->cdev;
-+ struct usb_request *req;
-+ struct usb_ep *ep;
-+ int i;
-+
-+ DBG(cdev, "create_bulk_endpoints dev: %p\n", dev);
-+
-+ ep = usb_ep_autoconfig(cdev->gadget, in_desc);
-+ if (!ep) {
-+ DBG(cdev, "usb_ep_autoconfig for ep_in failed\n");
-+ return -ENODEV;
-+ }
-+ DBG(cdev, "usb_ep_autoconfig for ep_in got %s\n", ep->name);
-+ dev->ep_in = ep;
-+
-+ ep = usb_ep_autoconfig(cdev->gadget, out_desc);
-+ if (!ep) {
-+ DBG(cdev, "usb_ep_autoconfig for ep_out failed\n");
-+ return -ENODEV;
-+ }
-+ DBG(cdev, "usb_ep_autoconfig for adb ep_out got %s\n", ep->name);
-+ dev->ep_out = ep;
-+
-+ /* now allocate requests for our endpoints */
-+ for (i = 0; i < RX_REQ_MAX; i++) {
-+ req = adb_request_new(dev->ep_out, BULK_BUFFER_SIZE);
-+ if (!req)
-+ goto fail;
-+ req->complete = adb_complete_out;
-+ req_put(dev, &dev->rx_idle, req);
-+ }
-+
-+ for (i = 0; i < TX_REQ_MAX; i++) {
-+ req = adb_request_new(dev->ep_in, BULK_BUFFER_SIZE);
-+ if (!req)
-+ goto fail;
-+ req->complete = adb_complete_in;
-+ req_put(dev, &dev->tx_idle, req);
-+ }
-+
-+ return 0;
-+
-+fail:
-+ printk(KERN_ERR "adb_bind() could not allocate requests\n");
-+ return -1;
-+}
-+
-+static ssize_t adb_read(struct file *fp, char __user *buf,
-+ size_t count, loff_t *pos)
-+{
-+ struct adb_dev *dev = fp->private_data;
-+ struct usb_composite_dev *cdev = dev->cdev;
-+ struct usb_request *req;
-+ int r = count, xfer;
-+ int ret;
-+
-+ DBG(cdev, "adb_read(%d)\n", count);
-+
-+ if (_lock(&dev->read_excl))
-+ return -EBUSY;
-+
-+ /* we will block until we're online */
-+ while (!(dev->online || dev->error)) {
-+ DBG(cdev, "adb_read: waiting for online state\n");
-+ ret = wait_event_interruptible(dev->read_wq,
-+ (dev->online || dev->error));
-+ if (ret < 0) {
-+ _unlock(&dev->read_excl);
-+ return ret;
-+ }
-+ }
-+
-+ while (count > 0) {
-+ if (dev->error) {
-+ DBG(cdev, "adb_read dev->error\n");
-+ r = -EIO;
-+ break;
-+ }
-+
-+ /* if we have idle read requests, get them queued */
-+ while ((req = req_get(dev, &dev->rx_idle))) {
-+requeue_req:
-+ req->length = BULK_BUFFER_SIZE;
-+ ret = usb_ep_queue(dev->ep_out, req, GFP_ATOMIC);
-+
-+ if (ret < 0) {
-+ r = -EIO;
-+ dev->error = 1;
-+ req_put(dev, &dev->rx_idle, req);
-+ goto fail;
-+ } else {
-+ DBG(cdev, "rx %p queue\n", req);
-+ }
-+ }
-+
-+ /* if we have data pending, give it to userspace */
-+ if (dev->read_count > 0) {
-+ if (dev->read_count < count)
-+ xfer = dev->read_count;
-+ else
-+ xfer = count;
-+
-+ if (copy_to_user(buf, dev->read_buf, xfer)) {
-+ r = -EFAULT;
-+ break;
-+ }
-+ dev->read_buf += xfer;
-+ dev->read_count -= xfer;
-+ buf += xfer;
-+ count -= xfer;
-+
-+ /* if we've emptied the buffer, release the request */
-+ if (dev->read_count == 0) {
-+ req_put(dev, &dev->rx_idle, dev->read_req);
-+ dev->read_req = 0;
-+ }
-+ continue;
-+ }
-+
-+ /* wait for a request to complete */
-+ req = 0;
-+ ret = wait_event_interruptible(dev->read_wq,
-+ ((req = req_get(dev, &dev->rx_done)) || dev->error));
-+ if (req != 0) {
-+ /* if we got a 0-len one we need to put it back into
-+ ** service. if we made it the current read req we'd
-+ ** be stuck forever
-+ */
-+ if (req->actual == 0)
-+ goto requeue_req;
-+
-+ dev->read_req = req;
-+ dev->read_count = req->actual;
-+ dev->read_buf = req->buf;
-+ DBG(cdev, "rx %p %d\n", req, req->actual);
-+ }
-+
-+ if (ret < 0) {
-+ r = ret;
-+ break;
-+ }
-+ }
-+
-+fail:
-+ _unlock(&dev->read_excl);
-+ DBG(cdev, "adb_read returning %d\n", r);
-+ return r;
-+}
-+
-+static ssize_t adb_write(struct file *fp, const char __user *buf,
-+ size_t count, loff_t *pos)
-+{
-+ struct adb_dev *dev = fp->private_data;
-+ struct usb_composite_dev *cdev = dev->cdev;
-+ struct usb_request *req = 0;
-+ int r = count, xfer;
-+ int ret;
-+
-+ DBG(cdev, "adb_write(%d)\n", count);
-+
-+ if (_lock(&dev->write_excl))
-+ return -EBUSY;
-+
-+ while (count > 0) {
-+ if (dev->error) {
-+ DBG(cdev, "adb_write dev->error\n");
-+ r = -EIO;
-+ break;
-+ }
-+
-+ /* get an idle tx request to use */
-+ req = 0;
-+ ret = wait_event_interruptible(dev->write_wq,
-+ ((req = req_get(dev, &dev->tx_idle)) || dev->error));
-+
-+ if (ret < 0) {
-+ r = ret;
-+ break;
-+ }
-+
-+ if (req != 0) {
-+ if (count > BULK_BUFFER_SIZE)
-+ xfer = BULK_BUFFER_SIZE;
-+ else
-+ xfer = count;
-+ if (copy_from_user(req->buf, buf, xfer)) {
-+ r = -EFAULT;
-+ break;
-+ }
-+
-+ req->length = xfer;
-+ ret = usb_ep_queue(dev->ep_in, req, GFP_ATOMIC);
-+ if (ret < 0) {
-+ DBG(cdev, "adb_write: xfer error %d\n", ret);
-+ dev->error = 1;
-+ r = -EIO;
-+ break;
-+ }
-+
-+ buf += xfer;
-+ count -= xfer;
-+
-+ /* zero this so we don't try to free it on error exit */
-+ req = 0;
-+ }
-+ }
-+
-+ if (req)
-+ req_put(dev, &dev->tx_idle, req);
-+
-+ _unlock(&dev->write_excl);
-+ DBG(cdev, "adb_write returning %d\n", r);
-+ return r;
-+}
-+
-+static int adb_open(struct inode *ip, struct file *fp)
-+{
-+ printk(KERN_INFO "adb_open\n");
-+ if (_lock(&_adb_dev->open_excl))
-+ return -EBUSY;
-+
-+ fp->private_data = _adb_dev;
-+
-+ /* clear the error latch */
-+ _adb_dev->error = 0;
-+
-+ return 0;
-+}
-+
-+static int adb_release(struct inode *ip, struct file *fp)
-+{
-+ printk(KERN_INFO "adb_release\n");
-+ _unlock(&_adb_dev->open_excl);
-+ return 0;
-+}
-+
-+/* file operations for ADB device /dev/android_adb */
-+static struct file_operations adb_fops = {
-+ .owner = THIS_MODULE,
-+ .read = adb_read,
-+ .write = adb_write,
-+ .open = adb_open,
-+ .release = adb_release,
-+};
-+
-+static struct miscdevice adb_device = {
-+ .minor = MISC_DYNAMIC_MINOR,
-+ .name = shortname,
-+ .fops = &adb_fops,
-+};
-+
-+static int __init
-+adb_function_bind(struct usb_configuration *c, struct usb_function *f)
-+{
-+ struct usb_composite_dev *cdev = c->cdev;
-+ struct adb_dev *dev = func_to_dev(f);
-+ int id;
-+ int ret;
-+
-+ dev->cdev = cdev;
-+ DBG(cdev, "adb_function_bind dev: %p\n", dev);
-+
-+ /* allocate interface ID(s) */
-+ id = usb_interface_id(c, f);
-+ if (id < 0)
-+ return id;
-+ adb_interface_desc.bInterfaceNumber = id;
-+
-+ /* allocate endpoints */
-+ ret = create_bulk_endpoints(dev, &adb_fullspeed_in_desc,
-+ &adb_fullspeed_out_desc);
-+ if (ret)
-+ return ret;
-+
-+ /* support high speed hardware */
-+ if (gadget_is_dualspeed(c->cdev->gadget)) {
-+ adb_highspeed_in_desc.bEndpointAddress =
-+ adb_fullspeed_in_desc.bEndpointAddress;
-+ adb_highspeed_out_desc.bEndpointAddress =
-+ adb_fullspeed_out_desc.bEndpointAddress;
-+ }
-+
-+ DBG(cdev, "%s speed %s: IN/%s, OUT/%s\n",
-+ gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
-+ f->name, dev->ep_in->name, dev->ep_out->name);
-+ return 0;
-+}
-+
-+static void
-+adb_function_unbind(struct usb_configuration *c, struct usb_function *f)
-+{
-+ struct adb_dev *dev = func_to_dev(f);
-+ struct usb_request *req;
-+
-+ spin_lock_irq(&dev->lock);
-+
-+ while ((req = req_get(dev, &dev->rx_idle)))
-+ adb_request_free(req, dev->ep_out);
-+ while ((req = req_get(dev, &dev->tx_idle)))
-+ adb_request_free(req, dev->ep_in);
-+
-+ dev->online = 0;
-+ dev->error = 1;
-+ spin_unlock_irq(&dev->lock);
-+
-+ misc_deregister(&adb_device);
-+ kfree(_adb_dev);
-+ _adb_dev = NULL;
-+}
-+
-+static int adb_function_set_alt(struct usb_function *f,
-+ unsigned intf, unsigned alt)
-+{
-+ struct adb_dev *dev = func_to_dev(f);
-+ struct usb_composite_dev *cdev = f->config->cdev;
-+ int ret;
-+
-+ DBG(cdev, "adb_function_set_alt intf: %d alt: %d\n", intf, alt);
-+ ret = usb_ep_enable(dev->ep_in,
-+ ep_choose(cdev->gadget,
-+ &adb_highspeed_in_desc,
-+ &adb_fullspeed_in_desc));
-+ if (ret)
-+ return ret;
-+ ret = usb_ep_enable(dev->ep_out,
-+ ep_choose(cdev->gadget,
-+ &adb_highspeed_out_desc,
-+ &adb_fullspeed_out_desc));
-+ if (ret) {
-+ usb_ep_disable(dev->ep_in);
-+ return ret;
-+ }
-+ dev->online = 1;
-+
-+ /* readers may be blocked waiting for us to go online */
-+ wake_up(&dev->read_wq);
-+ return 0;
-+}
-+
-+static void adb_function_disable(struct usb_function *f)
-+{
-+ struct adb_dev *dev = func_to_dev(f);
-+ struct usb_composite_dev *cdev = dev->cdev;
-+
-+ DBG(cdev, "adb_function_disable\n");
-+ dev->online = 0;
-+ dev->error = 1;
-+ usb_ep_disable(dev->ep_in);
-+ usb_ep_disable(dev->ep_out);
-+
-+ /* readers may be blocked waiting for us to go online */
-+ wake_up(&dev->read_wq);
-+
-+ VDBG(cdev, "%s disabled\n", dev->function.name);
-+}
-+
-+int __init adb_function_add(struct usb_composite_dev *cdev,
-+ struct usb_configuration *c)
-+{
-+ struct adb_dev *dev;
-+ int ret;
-+
-+ printk(KERN_INFO "adb_function_add\n");
-+
-+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
-+ if (!dev)
-+ return -ENOMEM;
-+
-+ spin_lock_init(&dev->lock);
-+
-+ init_waitqueue_head(&dev->read_wq);
-+ init_waitqueue_head(&dev->write_wq);
-+
-+ atomic_set(&dev->open_excl, 0);
-+ atomic_set(&dev->read_excl, 0);
-+ atomic_set(&dev->write_excl, 0);
-+
-+ INIT_LIST_HEAD(&dev->rx_idle);
-+ INIT_LIST_HEAD(&dev->rx_done);
-+ INIT_LIST_HEAD(&dev->tx_idle);
-+
-+ dev->cdev = cdev;
-+ dev->function.name = "adb";
-+ dev->function.descriptors = null_adb_descs;
-+ dev->function.hs_descriptors = null_adb_descs;
-+ dev->function.bind = adb_function_bind;
-+ dev->function.unbind = adb_function_unbind;
-+ dev->function.set_alt = adb_function_set_alt;
-+ dev->function.disable = adb_function_disable;
-+
-+ /* _adb_dev must be set before calling usb_gadget_register_driver */
-+ _adb_dev = dev;
-+
-+ ret = misc_register(&adb_device);
-+ if (ret)
-+ goto err1;
-+ ret = usb_add_function(c, &dev->function);
-+ if (ret)
-+ goto err2;
-+
-+ return 0;
-+
-+err2:
-+ misc_deregister(&adb_device);
-+err1:
-+ kfree(dev);
-+ printk(KERN_ERR "adb gadget driver failed to initialize\n");
-+ return ret;
-+}
-+
-+void adb_function_enable(int enable)
-+{
-+ struct adb_dev *dev = _adb_dev;
-+
-+ if (dev) {
-+ DBG(dev->cdev, "adb_function_enable(%s)\n",
-+ enable ? "true" : "false");
-+
-+ if (enable) {
-+ dev->function.descriptors = fs_adb_descs;
-+ dev->function.hs_descriptors = hs_adb_descs;
-+ } else {
-+ dev->function.descriptors = null_adb_descs;
-+ dev->function.hs_descriptors = null_adb_descs;
-+ }
-+ }
-+}
-+
---- /dev/null
-+++ b/drivers/usb/gadget/f_adb.h
-@@ -0,0 +1,25 @@
-+/*
-+ * Gadget Driver for Android ADB
-+ *
-+ * Copyright (C) 2008 Google, Inc.
-+ * Author: Mike Lockwood <lockwood@android.com>
-+ *
-+ * This software is licensed under the terms of the GNU General Public
-+ * License version 2, as published by the Free Software Foundation, and
-+ * may be copied, distributed, and modified under those terms.
-+ *
-+ * 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.
-+ *
-+ */
-+
-+#ifndef __F_ADB_H
-+#define __F_ADB_H
-+
-+int adb_function_add(struct usb_composite_dev *cdev,
-+ struct usb_configuration *c);
-+void adb_function_enable(int enable);
-+
-+#endif /* __F_ADB_H */
---- /dev/null
-+++ b/drivers/usb/gadget/f_mass_storage.c
-@@ -0,0 +1,2906 @@
-+/*
-+ * drivers/usb/gadget/f_mass_storage.c
-+ *
-+ * Function Driver for USB Mass Storage
-+ *
-+ * Copyright (C) 2008 Google, Inc.
-+ * Author: Mike Lockwood <lockwood@android.com>
-+ *
-+ * Based heavily on the file_storage gadget driver in
-+ * drivers/usb/gadget/file_storage.c and licensed under the same terms:
-+ *
-+ * Copyright (C) 2003-2007 Alan Stern
-+ * All rights reserved.
-+ *
-+ * Redistribution and use in source and binary forms, with or without
-+ * modification, are permitted provided that the following conditions
-+ * are met:
-+ * 1. Redistributions of source code must retain the above copyright
-+ * notice, this list of conditions, and the following disclaimer,
-+ * without modification.
-+ * 2. Redistributions in binary form must reproduce the above copyright
-+ * notice, this list of conditions and the following disclaimer in the
-+ * documentation and/or other materials provided with the distribution.
-+ * 3. The names of the above-listed copyright holders may not be used
-+ * to endorse or promote products derived from this software without
-+ * specific prior written permission.
-+ *
-+ * ALTERNATIVELY, this software may be distributed under the terms of the
-+ * GNU General Public License ("GPL") as published by the Free Software
-+ * Foundation, either version 2 of that License or (at your option) any
-+ * later version.
-+ *
-+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
-+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-+ */
-+
-+/* #define DEBUG */
-+/* #define VERBOSE_DEBUG */
-+/* #define DUMP_MSGS */
-+
-+
-+#include <linux/blkdev.h>
-+#include <linux/completion.h>
-+#include <linux/dcache.h>
-+#include <linux/delay.h>
-+#include <linux/device.h>
-+#include <linux/fcntl.h>
-+#include <linux/file.h>
-+#include <linux/fs.h>
-+#include <linux/kref.h>
-+#include <linux/kthread.h>
-+#include <linux/limits.h>
-+#include <linux/rwsem.h>
-+#include <linux/slab.h>
-+#include <linux/spinlock.h>
-+#include <linux/string.h>
-+#include <linux/switch.h>
-+#include <linux/freezer.h>
-+#include <linux/utsname.h>
-+#include <linux/wakelock.h>
-+
-+#include <linux/usb_usual.h>
-+#include <linux/usb/ch9.h>
-+#include <linux/usb/composite.h>
-+#include <linux/usb/gadget.h>
-+
-+#include "f_mass_storage.h"
-+#include "gadget_chips.h"
-+
-+
-+#define BULK_BUFFER_SIZE 4096
-+
-+/*-------------------------------------------------------------------------*/
-+
-+#define DRIVER_NAME "usb_mass_storage"
-+#define MAX_LUNS 8
-+
-+static const char shortname[] = DRIVER_NAME;
-+
-+#ifdef DEBUG
-+#define LDBG(lun, fmt, args...) \
-+ dev_dbg(&(lun)->dev , fmt , ## args)
-+#define MDBG(fmt,args...) \
-+ printk(KERN_DEBUG DRIVER_NAME ": " fmt , ## args)
-+#else
-+#define LDBG(lun, fmt, args...) \
-+ do { } while (0)
-+#define MDBG(fmt,args...) \
-+ do { } while (0)
-+#undef VERBOSE_DEBUG
-+#undef DUMP_MSGS
-+#endif /* DEBUG */
-+
-+#ifdef VERBOSE_DEBUG
-+#define VLDBG LDBG
-+#else
-+#define VLDBG(lun, fmt, args...) \
-+ do { } while (0)
-+#endif /* VERBOSE_DEBUG */
-+
-+#define LERROR(lun, fmt, args...) \
-+ dev_err(&(lun)->dev , fmt , ## args)
-+#define LWARN(lun, fmt, args...) \
-+ dev_warn(&(lun)->dev , fmt , ## args)
-+#define LINFO(lun, fmt, args...) \
-+ dev_info(&(lun)->dev , fmt , ## args)
-+
-+#define MINFO(fmt,args...) \
-+ printk(KERN_INFO DRIVER_NAME ": " fmt , ## args)
-+
-+#undef DBG
-+#undef VDBG
-+#undef ERROR
-+#undef WARNING
-+#undef INFO
-+#define DBG(d, fmt, args...) \
-+ dev_dbg(&(d)->cdev->gadget->dev , fmt , ## args)
-+#define VDBG(d, fmt, args...) \
-+ dev_vdbg(&(d)->cdev->gadget->dev , fmt , ## args)
-+#define ERROR(d, fmt, args...) \
-+ dev_err(&(d)->cdev->gadget->dev , fmt , ## args)
-+#define WARNING(d, fmt, args...) \
-+ dev_warn(&(d)->cdev->gadget->dev , fmt , ## args)
-+#define INFO(d, fmt, args...) \
-+ dev_info(&(d)->cdev->gadget->dev , fmt , ## args)
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+/* Bulk-only data structures */
-+
-+/* Command Block Wrapper */
-+struct bulk_cb_wrap {
-+ __le32 Signature; /* Contains 'USBC' */
-+ u32 Tag; /* Unique per command id */
-+ __le32 DataTransferLength; /* Size of the data */
-+ u8 Flags; /* Direction in bit 7 */
-+ u8 Lun; /* LUN (normally 0) */
-+ u8 Length; /* Of the CDB, <= MAX_COMMAND_SIZE */
-+ u8 CDB[16]; /* Command Data Block */
-+};
-+
-+#define USB_BULK_CB_WRAP_LEN 31
-+#define USB_BULK_CB_SIG 0x43425355 /* Spells out USBC */
-+#define USB_BULK_IN_FLAG 0x80
-+
-+/* Command Status Wrapper */
-+struct bulk_cs_wrap {
-+ __le32 Signature; /* Should = 'USBS' */
-+ u32 Tag; /* Same as original command */
-+ __le32 Residue; /* Amount not transferred */
-+ u8 Status; /* See below */
-+};
-+
-+#define USB_BULK_CS_WRAP_LEN 13
-+#define USB_BULK_CS_SIG 0x53425355 /* Spells out 'USBS' */
-+#define USB_STATUS_PASS 0
-+#define USB_STATUS_FAIL 1
-+#define USB_STATUS_PHASE_ERROR 2
-+
-+/* Bulk-only class specific requests */
-+#define USB_BULK_RESET_REQUEST 0xff
-+#define USB_BULK_GET_MAX_LUN_REQUEST 0xfe
-+
-+/* Length of a SCSI Command Data Block */
-+#define MAX_COMMAND_SIZE 16
-+
-+/* SCSI commands that we recognize */
-+#define SC_FORMAT_UNIT 0x04
-+#define SC_INQUIRY 0x12
-+#define SC_MODE_SELECT_6 0x15
-+#define SC_MODE_SELECT_10 0x55
-+#define SC_MODE_SENSE_6 0x1a
-+#define SC_MODE_SENSE_10 0x5a
-+#define SC_PREVENT_ALLOW_MEDIUM_REMOVAL 0x1e
-+#define SC_READ_6 0x08
-+#define SC_READ_10 0x28
-+#define SC_READ_12 0xa8
-+#define SC_READ_CAPACITY 0x25
-+#define SC_READ_FORMAT_CAPACITIES 0x23
-+#define SC_RELEASE 0x17
-+#define SC_REQUEST_SENSE 0x03
-+#define SC_RESERVE 0x16
-+#define SC_SEND_DIAGNOSTIC 0x1d
-+#define SC_START_STOP_UNIT 0x1b
-+#define SC_SYNCHRONIZE_CACHE 0x35
-+#define SC_TEST_UNIT_READY 0x00
-+#define SC_VERIFY 0x2f
-+#define SC_WRITE_6 0x0a
-+#define SC_WRITE_10 0x2a
-+#define SC_WRITE_12 0xaa
-+
-+/* SCSI Sense Key/Additional Sense Code/ASC Qualifier values */
-+#define SS_NO_SENSE 0
-+#define SS_COMMUNICATION_FAILURE 0x040800
-+#define SS_INVALID_COMMAND 0x052000
-+#define SS_INVALID_FIELD_IN_CDB 0x052400
-+#define SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE 0x052100
-+#define SS_LOGICAL_UNIT_NOT_SUPPORTED 0x052500
-+#define SS_MEDIUM_NOT_PRESENT 0x023a00
-+#define SS_MEDIUM_REMOVAL_PREVENTED 0x055302
-+#define SS_NOT_READY_TO_READY_TRANSITION 0x062800
-+#define SS_RESET_OCCURRED 0x062900
-+#define SS_SAVING_PARAMETERS_NOT_SUPPORTED 0x053900
-+#define SS_UNRECOVERED_READ_ERROR 0x031100
-+#define SS_WRITE_ERROR 0x030c02
-+#define SS_WRITE_PROTECTED 0x072700
-+
-+#define SK(x) ((u8) ((x) >> 16)) /* Sense Key byte, etc. */
-+#define ASC(x) ((u8) ((x) >> 8))
-+#define ASCQ(x) ((u8) (x))
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+struct lun {
-+ struct file *filp;
-+ loff_t file_length;
-+ loff_t num_sectors;
-+
-+ unsigned int ro : 1;
-+ unsigned int prevent_medium_removal : 1;
-+ unsigned int registered : 1;
-+ unsigned int info_valid : 1;
-+
-+ u32 sense_data;
-+ u32 sense_data_info;
-+ u32 unit_attention_data;
-+
-+ struct device dev;
-+};
-+
-+#define backing_file_is_open(curlun) ((curlun)->filp != NULL)
-+
-+
-+static struct lun *dev_to_lun(struct device *dev)
-+{
-+ return container_of(dev, struct lun, dev);
-+}
-+
-+/* Big enough to hold our biggest descriptor */
-+#define EP0_BUFSIZE 256
-+#define DELAYED_STATUS (EP0_BUFSIZE + 999) /* An impossibly large value */
-+
-+/* Number of buffers we will use. 2 is enough for double-buffering */
-+#define NUM_BUFFERS 2
-+
-+enum fsg_buffer_state {
-+ BUF_STATE_EMPTY = 0,
-+ BUF_STATE_FULL,
-+ BUF_STATE_BUSY
-+};
-+
-+struct fsg_buffhd {
-+ void *buf;
-+ enum fsg_buffer_state state;
-+ struct fsg_buffhd *next;
-+
-+ /* The NetChip 2280 is faster, and handles some protocol faults
-+ * better, if we don't submit any short bulk-out read requests.
-+ * So we will record the intended request length here. */
-+ unsigned int bulk_out_intended_length;
-+
-+ struct usb_request *inreq;
-+ int inreq_busy;
-+ struct usb_request *outreq;
-+ int outreq_busy;
-+};
-+
-+enum fsg_state {
-+ /* This one isn't used anywhere */
-+ FSG_STATE_COMMAND_PHASE = -10,
-+
-+ FSG_STATE_DATA_PHASE,
-+ FSG_STATE_STATUS_PHASE,
-+
-+ FSG_STATE_IDLE = 0,
-+ FSG_STATE_ABORT_BULK_OUT,
-+ FSG_STATE_RESET,
-+ FSG_STATE_CONFIG_CHANGE,
-+ FSG_STATE_EXIT,
-+ FSG_STATE_TERMINATED
-+};
-+
-+enum data_direction {
-+ DATA_DIR_UNKNOWN = 0,
-+ DATA_DIR_FROM_HOST,
-+ DATA_DIR_TO_HOST,
-+ DATA_DIR_NONE
-+};
-+
-+struct fsg_dev {
-+ struct usb_function function;
-+ struct usb_composite_dev *cdev;
-+
-+ /* lock protects: state and all the req_busy's */
-+ spinlock_t lock;
-+
-+ /* filesem protects: backing files in use */
-+ struct rw_semaphore filesem;
-+
-+ /* reference counting: wait until all LUNs are released */
-+ struct kref ref;
-+
-+ unsigned int bulk_out_maxpacket;
-+ enum fsg_state state; /* For exception handling */
-+
-+ u8 config, new_config;
-+
-+ unsigned int running : 1;
-+ unsigned int bulk_in_enabled : 1;
-+ unsigned int bulk_out_enabled : 1;
-+ unsigned int phase_error : 1;
-+ unsigned int short_packet_received : 1;
-+ unsigned int bad_lun_okay : 1;
-+
-+ unsigned long atomic_bitflags;
-+#define REGISTERED 0
-+#define CLEAR_BULK_HALTS 1
-+#define SUSPENDED 2
-+
-+ struct usb_ep *bulk_in;
-+ struct usb_ep *bulk_out;
-+
-+ struct fsg_buffhd *next_buffhd_to_fill;
-+ struct fsg_buffhd *next_buffhd_to_drain;
-+ struct fsg_buffhd buffhds[NUM_BUFFERS];
-+
-+ int thread_wakeup_needed;
-+ struct completion thread_notifier;
-+ struct task_struct *thread_task;
-+
-+ int cmnd_size;
-+ u8 cmnd[MAX_COMMAND_SIZE];
-+ enum data_direction data_dir;
-+ u32 data_size;
-+ u32 data_size_from_cmnd;
-+ u32 tag;
-+ unsigned int lun;
-+ u32 residue;
-+ u32 usb_amount_left;
-+
-+ unsigned int nluns;
-+ struct lun *luns;
-+ struct lun *curlun;
-+
-+ u32 buf_size;
-+ const char *vendor;
-+ const char *product;
-+ int release;
-+
-+ struct switch_dev sdev;
-+
-+ struct wake_lock wake_lock;
-+};
-+
-+static inline struct fsg_dev *func_to_dev(struct usb_function *f)
-+{
-+ return container_of(f, struct fsg_dev, function);
-+}
-+
-+static int exception_in_progress(struct fsg_dev *fsg)
-+{
-+ return (fsg->state > FSG_STATE_IDLE);
-+}
-+
-+/* Make bulk-out requests be divisible by the maxpacket size */
-+static void set_bulk_out_req_length(struct fsg_dev *fsg,
-+ struct fsg_buffhd *bh, unsigned int length)
-+{
-+ unsigned int rem;
-+
-+ bh->bulk_out_intended_length = length;
-+ rem = length % fsg->bulk_out_maxpacket;
-+ if (rem > 0)
-+ length += fsg->bulk_out_maxpacket - rem;
-+ bh->outreq->length = length;
-+}
-+
-+static struct fsg_dev *the_fsg;
-+
-+static void close_backing_file(struct fsg_dev *fsg, struct lun *curlun);
-+static void close_all_backing_files(struct fsg_dev *fsg);
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+#ifdef DUMP_MSGS
-+
-+static void dump_msg(struct fsg_dev *fsg, const char *label,
-+ const u8 *buf, unsigned int length)
-+{
-+ if (length < 512) {
-+ DBG(fsg, "%s, length %u:\n", label, length);
-+ print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
-+ 16, 1, buf, length, 0);
-+ }
-+}
-+
-+static void dump_cdb(struct fsg_dev *fsg)
-+{}
-+
-+#else
-+
-+static void dump_msg(struct fsg_dev *fsg, const char *label,
-+ const u8 *buf, unsigned int length)
-+{}
-+
-+#ifdef VERBOSE_DEBUG
-+
-+static void dump_cdb(struct fsg_dev *fsg)
-+{
-+ print_hex_dump(KERN_DEBUG, "SCSI CDB: ", DUMP_PREFIX_NONE,
-+ 16, 1, fsg->cmnd, fsg->cmnd_size, 0);
-+}
-+
-+#else
-+
-+static void dump_cdb(struct fsg_dev *fsg)
-+{}
-+
-+#endif /* VERBOSE_DEBUG */
-+#endif /* DUMP_MSGS */
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+/* Routines for unaligned data access */
-+
-+static u16 get_be16(u8 *buf)
-+{
-+ return ((u16) buf[0] << 8) | ((u16) buf[1]);
-+}
-+
-+static u32 get_be32(u8 *buf)
-+{
-+ return ((u32) buf[0] << 24) | ((u32) buf[1] << 16) |
-+ ((u32) buf[2] << 8) | ((u32) buf[3]);
-+}
-+
-+static void put_be16(u8 *buf, u16 val)
-+{
-+ buf[0] = val >> 8;
-+ buf[1] = val;
-+}
-+
-+static void put_be32(u8 *buf, u32 val)
-+{
-+ buf[0] = val >> 24;
-+ buf[1] = val >> 16;
-+ buf[2] = val >> 8;
-+ buf[3] = val & 0xff;
-+}
-+
-+/*-------------------------------------------------------------------------*/
-+
-+/*
-+ * DESCRIPTORS ... most are static, but strings and (full) configuration
-+ * descriptors are built on demand. Also the (static) config and interface
-+ * descriptors are adjusted during fsg_bind().
-+ */
-+
-+/* There is only one interface. */
-+
-+static struct usb_interface_descriptor
-+intf_desc = {
-+ .bLength = sizeof intf_desc,
-+ .bDescriptorType = USB_DT_INTERFACE,
-+
-+ .bNumEndpoints = 2, /* Adjusted during fsg_bind() */
-+ .bInterfaceClass = USB_CLASS_MASS_STORAGE,
-+ .bInterfaceSubClass = US_SC_SCSI,
-+ .bInterfaceProtocol = US_PR_BULK,
-+};
-+
-+/* Three full-speed endpoint descriptors: bulk-in, bulk-out,
-+ * and interrupt-in. */
-+
-+static struct usb_endpoint_descriptor
-+fs_bulk_in_desc = {
-+ .bLength = USB_DT_ENDPOINT_SIZE,
-+ .bDescriptorType = USB_DT_ENDPOINT,
-+
-+ .bEndpointAddress = USB_DIR_IN,
-+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
-+ /* wMaxPacketSize set by autoconfiguration */
-+};
-+
-+static struct usb_endpoint_descriptor
-+fs_bulk_out_desc = {
-+ .bLength = USB_DT_ENDPOINT_SIZE,
-+ .bDescriptorType = USB_DT_ENDPOINT,
-+
-+ .bEndpointAddress = USB_DIR_OUT,
-+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
-+ /* wMaxPacketSize set by autoconfiguration */
-+};
-+
-+static struct usb_descriptor_header *fs_function[] = {
-+ (struct usb_descriptor_header *) &intf_desc,
-+ (struct usb_descriptor_header *) &fs_bulk_in_desc,
-+ (struct usb_descriptor_header *) &fs_bulk_out_desc,
-+ NULL,
-+};
-+#define FS_FUNCTION_PRE_EP_ENTRIES 2
-+
-+
-+static struct usb_endpoint_descriptor
-+hs_bulk_in_desc = {
-+ .bLength = USB_DT_ENDPOINT_SIZE,
-+ .bDescriptorType = USB_DT_ENDPOINT,
-+
-+ /* bEndpointAddress copied from fs_bulk_in_desc during fsg_bind() */
-+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
-+ .wMaxPacketSize = __constant_cpu_to_le16(512),
-+};
-+
-+static struct usb_endpoint_descriptor
-+hs_bulk_out_desc = {
-+ .bLength = USB_DT_ENDPOINT_SIZE,
-+ .bDescriptorType = USB_DT_ENDPOINT,
-+
-+ /* bEndpointAddress copied from fs_bulk_out_desc during fsg_bind() */
-+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
-+ .wMaxPacketSize = __constant_cpu_to_le16(512),
-+ .bInterval = 1, /* NAK every 1 uframe */
-+};
-+
-+
-+static struct usb_descriptor_header *hs_function[] = {
-+ (struct usb_descriptor_header *) &intf_desc,
-+ (struct usb_descriptor_header *) &hs_bulk_in_desc,
-+ (struct usb_descriptor_header *) &hs_bulk_out_desc,
-+ NULL,
-+};
-+
-+/* Maxpacket and other transfer characteristics vary by speed. */
-+static struct usb_endpoint_descriptor *
-+ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *fs,
-+ struct usb_endpoint_descriptor *hs)
-+{
-+ if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
-+ return hs;
-+ return fs;
-+}
-+
-+/*-------------------------------------------------------------------------*/
-+
-+/* These routines may be called in process context or in_irq */
-+
-+/* Caller must hold fsg->lock */
-+static void wakeup_thread(struct fsg_dev *fsg)
-+{
-+ /* Tell the main thread that something has happened */
-+ fsg->thread_wakeup_needed = 1;
-+ if (fsg->thread_task)
-+ wake_up_process(fsg->thread_task);
-+}
-+
-+
-+static void raise_exception(struct fsg_dev *fsg, enum fsg_state new_state)
-+{
-+ unsigned long flags;
-+
-+ DBG(fsg, "raise_exception %d\n", (int)new_state);
-+ /* Do nothing if a higher-priority exception is already in progress.
-+ * If a lower-or-equal priority exception is in progress, preempt it
-+ * and notify the main thread by sending it a signal. */
-+ spin_lock_irqsave(&fsg->lock, flags);
-+ if (fsg->state <= new_state) {
-+ fsg->state = new_state;
-+ if (fsg->thread_task)
-+ send_sig_info(SIGUSR1, SEND_SIG_FORCED,
-+ fsg->thread_task);
-+ }
-+ spin_unlock_irqrestore(&fsg->lock, flags);
-+}
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+/* Bulk and interrupt endpoint completion handlers.
-+ * These always run in_irq. */
-+
-+static void bulk_in_complete(struct usb_ep *ep, struct usb_request *req)
-+{
-+ struct fsg_dev *fsg = ep->driver_data;
-+ struct fsg_buffhd *bh = req->context;
-+
-+ if (req->status || req->actual != req->length)
-+ DBG(fsg, "%s --> %d, %u/%u\n", __func__,
-+ req->status, req->actual, req->length);
-+
-+ /* Hold the lock while we update the request and buffer states */
-+ smp_wmb();
-+ spin_lock(&fsg->lock);
-+ bh->inreq_busy = 0;
-+ bh->state = BUF_STATE_EMPTY;
-+ wakeup_thread(fsg);
-+ spin_unlock(&fsg->lock);
-+}
-+
-+static void bulk_out_complete(struct usb_ep *ep, struct usb_request *req)
-+{
-+ struct fsg_dev *fsg = ep->driver_data;
-+ struct fsg_buffhd *bh = req->context;
-+
-+ dump_msg(fsg, "bulk-out", req->buf, req->actual);
-+ if (req->status || req->actual != bh->bulk_out_intended_length)
-+ DBG(fsg, "%s --> %d, %u/%u\n", __func__,
-+ req->status, req->actual,
-+ bh->bulk_out_intended_length);
-+
-+ /* Hold the lock while we update the request and buffer states */
-+ smp_wmb();
-+ spin_lock(&fsg->lock);
-+ bh->outreq_busy = 0;
-+ bh->state = BUF_STATE_FULL;
-+ wakeup_thread(fsg);
-+ spin_unlock(&fsg->lock);
-+}
-+
-+static int fsg_function_setup(struct usb_function *f,
-+ const struct usb_ctrlrequest *ctrl)
-+{
-+ struct fsg_dev *fsg = func_to_dev(f);
-+ struct usb_composite_dev *cdev = fsg->cdev;
-+ int value = -EOPNOTSUPP;
-+ u16 w_index = le16_to_cpu(ctrl->wIndex);
-+ u16 w_value = le16_to_cpu(ctrl->wValue);
-+ u16 w_length = le16_to_cpu(ctrl->wLength);
-+
-+ DBG(fsg, "fsg_function_setup\n");
-+ /* Handle Bulk-only class-specific requests */
-+ if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS) {
-+ DBG(fsg, "USB_TYPE_CLASS\n");
-+ switch (ctrl->bRequest) {
-+ case USB_BULK_RESET_REQUEST:
-+ if (ctrl->bRequestType != (USB_DIR_OUT |
-+ USB_TYPE_CLASS | USB_RECIP_INTERFACE))
-+ break;
-+ if (w_index != 0 || w_value != 0) {
-+ value = -EDOM;
-+ break;
-+ }
-+
-+ /* Raise an exception to stop the current operation
-+ * and reinitialize our state. */
-+ DBG(fsg, "bulk reset request\n");
-+ raise_exception(fsg, FSG_STATE_RESET);
-+ value = DELAYED_STATUS;
-+ break;
-+
-+ case USB_BULK_GET_MAX_LUN_REQUEST:
-+ if (ctrl->bRequestType != (USB_DIR_IN |
-+ USB_TYPE_CLASS | USB_RECIP_INTERFACE))
-+ break;
-+ if (w_index != 0 || w_value != 0) {
-+ value = -EDOM;
-+ break;
-+ }
-+ VDBG(fsg, "get max LUN\n");
-+ *(u8 *)cdev->req->buf = fsg->nluns - 1;
-+ value = 1;
-+ break;
-+ }
-+ }
-+
-+ if (value == -EOPNOTSUPP)
-+ VDBG(fsg,
-+ "unknown class-specific control req "
-+ "%02x.%02x v%04x i%04x l%u\n",
-+ ctrl->bRequestType, ctrl->bRequest,
-+ le16_to_cpu(ctrl->wValue), w_index, w_length);
-+ return value;
-+}
-+
-+/*-------------------------------------------------------------------------*/
-+
-+/* All the following routines run in process context */
-+
-+
-+/* Use this for bulk or interrupt transfers, not ep0 */
-+static void start_transfer(struct fsg_dev *fsg, struct usb_ep *ep,
-+ struct usb_request *req, int *pbusy,
-+ enum fsg_buffer_state *state)
-+{
-+ int rc;
-+
-+ DBG(fsg, "start_transfer req: %p, req->buf: %p\n", req, req->buf);
-+ if (ep == fsg->bulk_in)
-+ dump_msg(fsg, "bulk-in", req->buf, req->length);
-+
-+ spin_lock_irq(&fsg->lock);
-+ *pbusy = 1;
-+ *state = BUF_STATE_BUSY;
-+ spin_unlock_irq(&fsg->lock);
-+ rc = usb_ep_queue(ep, req, GFP_KERNEL);
-+ if (rc != 0) {
-+ *pbusy = 0;
-+ *state = BUF_STATE_EMPTY;
-+
-+ /* We can't do much more than wait for a reset */
-+
-+ /* Note: currently the net2280 driver fails zero-length
-+ * submissions if DMA is enabled. */
-+ if (rc != -ESHUTDOWN && !(rc == -EOPNOTSUPP &&
-+ req->length == 0))
-+ WARN(fsg, "error in submission: %s --> %d\n",
-+ (ep == fsg->bulk_in ? "bulk-in" : "bulk-out"),
-+ rc);
-+ }
-+}
-+
-+
-+static int sleep_thread(struct fsg_dev *fsg)
-+{
-+ int rc = 0;
-+
-+ /* Wait until a signal arrives or we are woken up */
-+ for (;;) {
-+ try_to_freeze();
-+ set_current_state(TASK_INTERRUPTIBLE);
-+ if (signal_pending(current)) {
-+ rc = -EINTR;
-+ break;
-+ }
-+ if (fsg->thread_wakeup_needed)
-+ break;
-+ schedule();
-+ }
-+ __set_current_state(TASK_RUNNING);
-+ fsg->thread_wakeup_needed = 0;
-+ return rc;
-+}
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+static int do_read(struct fsg_dev *fsg)
-+{
-+ struct lun *curlun = fsg->curlun;
-+ u32 lba;
-+ struct fsg_buffhd *bh;
-+ int rc;
-+ u32 amount_left;
-+ loff_t file_offset, file_offset_tmp;
-+ unsigned int amount;
-+ unsigned int partial_page;
-+ ssize_t nread;
-+
-+ /* Get the starting Logical Block Address and check that it's
-+ * not too big */
-+ if (fsg->cmnd[0] == SC_READ_6)
-+ lba = (fsg->cmnd[1] << 16) | get_be16(&fsg->cmnd[2]);
-+ else {
-+ lba = get_be32(&fsg->cmnd[2]);
-+
-+ /* We allow DPO (Disable Page Out = don't save data in the
-+ * cache) and FUA (Force Unit Access = don't read from the
-+ * cache), but we don't implement them. */
-+ if ((fsg->cmnd[1] & ~0x18) != 0) {
-+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
-+ return -EINVAL;
-+ }
-+ }
-+ if (lba >= curlun->num_sectors) {
-+ curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
-+ return -EINVAL;
-+ }
-+ file_offset = ((loff_t) lba) << 9;
-+
-+ /* Carry out the file reads */
-+ amount_left = fsg->data_size_from_cmnd;
-+ if (unlikely(amount_left == 0))
-+ return -EIO; /* No default reply */
-+
-+ for (;;) {
-+
-+ /* Figure out how much we need to read:
-+ * Try to read the remaining amount.
-+ * But don't read more than the buffer size.
-+ * And don't try to read past the end of the file.
-+ * Finally, if we're not at a page boundary, don't read past
-+ * the next page.
-+ * If this means reading 0 then we were asked to read past
-+ * the end of file. */
-+ amount = min((unsigned int) amount_left,
-+ (unsigned int)fsg->buf_size);
-+ amount = min((loff_t) amount,
-+ curlun->file_length - file_offset);
-+ partial_page = file_offset & (PAGE_CACHE_SIZE - 1);
-+ if (partial_page > 0)
-+ amount = min(amount, (unsigned int) PAGE_CACHE_SIZE -
-+ partial_page);
-+
-+ /* Wait for the next buffer to become available */
-+ bh = fsg->next_buffhd_to_fill;
-+ while (bh->state != BUF_STATE_EMPTY) {
-+ rc = sleep_thread(fsg);
-+ if (rc)
-+ return rc;
-+ }
-+
-+ /* If we were asked to read past the end of file,
-+ * end with an empty buffer. */
-+ if (amount == 0) {
-+ curlun->sense_data =
-+ SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
-+ curlun->sense_data_info = file_offset >> 9;
-+ curlun->info_valid = 1;
-+ bh->inreq->length = 0;
-+ bh->state = BUF_STATE_FULL;
-+ break;
-+ }
-+
-+ /* Perform the read */
-+ file_offset_tmp = file_offset;
-+ nread = vfs_read(curlun->filp,
-+ (char __user *) bh->buf,
-+ amount, &file_offset_tmp);
-+ VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
-+ (unsigned long long) file_offset,
-+ (int) nread);
-+ if (signal_pending(current))
-+ return -EINTR;
-+
-+ if (nread < 0) {
-+ LDBG(curlun, "error in file read: %d\n",
-+ (int) nread);
-+ nread = 0;
-+ } else if (nread < amount) {
-+ LDBG(curlun, "partial file read: %d/%u\n",
-+ (int) nread, amount);
-+ nread -= (nread & 511); /* Round down to a block */
-+ }
-+ file_offset += nread;
-+ amount_left -= nread;
-+ fsg->residue -= nread;
-+ bh->inreq->length = nread;
-+ bh->state = BUF_STATE_FULL;
-+
-+ /* If an error occurred, report it and its position */
-+ if (nread < amount) {
-+ curlun->sense_data = SS_UNRECOVERED_READ_ERROR;
-+ curlun->sense_data_info = file_offset >> 9;
-+ curlun->info_valid = 1;
-+ break;
-+ }
-+
-+ if (amount_left == 0)
-+ break; /* No more left to read */
-+
-+ /* Send this buffer and go read some more */
-+ start_transfer(fsg, fsg->bulk_in, bh->inreq,
-+ &bh->inreq_busy, &bh->state);
-+ fsg->next_buffhd_to_fill = bh->next;
-+ }
-+
-+ return -EIO; /* No default reply */
-+}
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+static int do_write(struct fsg_dev *fsg)
-+{
-+ struct lun *curlun = fsg->curlun;
-+ u32 lba;
-+ struct fsg_buffhd *bh;
-+ int get_some_more;
-+ u32 amount_left_to_req, amount_left_to_write;
-+ loff_t usb_offset, file_offset, file_offset_tmp;
-+ unsigned int amount;
-+ unsigned int partial_page;
-+ ssize_t nwritten;
-+ int rc;
-+
-+ if (curlun->ro) {
-+ curlun->sense_data = SS_WRITE_PROTECTED;
-+ return -EINVAL;
-+ }
-+ curlun->filp->f_flags &= ~O_SYNC; /* Default is not to wait */
-+
-+ /* Get the starting Logical Block Address and check that it's
-+ * not too big */
-+ if (fsg->cmnd[0] == SC_WRITE_6)
-+ lba = (fsg->cmnd[1] << 16) | get_be16(&fsg->cmnd[2]);
-+ else {
-+ lba = get_be32(&fsg->cmnd[2]);
-+
-+ /* We allow DPO (Disable Page Out = don't save data in the
-+ * cache) and FUA (Force Unit Access = write directly to the
-+ * medium). We don't implement DPO; we implement FUA by
-+ * performing synchronous output. */
-+ if ((fsg->cmnd[1] & ~0x18) != 0) {
-+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
-+ return -EINVAL;
-+ }
-+ if (fsg->cmnd[1] & 0x08) /* FUA */
-+ curlun->filp->f_flags |= O_SYNC;
-+ }
-+ if (lba >= curlun->num_sectors) {
-+ curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
-+ return -EINVAL;
-+ }
-+
-+ /* Carry out the file writes */
-+ get_some_more = 1;
-+ file_offset = usb_offset = ((loff_t) lba) << 9;
-+ amount_left_to_req = amount_left_to_write = fsg->data_size_from_cmnd;
-+
-+ while (amount_left_to_write > 0) {
-+
-+ /* Queue a request for more data from the host */
-+ bh = fsg->next_buffhd_to_fill;
-+ if (bh->state == BUF_STATE_EMPTY && get_some_more) {
-+
-+ /* Figure out how much we want to get:
-+ * Try to get the remaining amount.
-+ * But don't get more than the buffer size.
-+ * And don't try to go past the end of the file.
-+ * If we're not at a page boundary,
-+ * don't go past the next page.
-+ * If this means getting 0, then we were asked
-+ * to write past the end of file.
-+ * Finally, round down to a block boundary. */
-+ amount = min(amount_left_to_req, (u32)fsg->buf_size);
-+ amount = min((loff_t) amount, curlun->file_length -
-+ usb_offset);
-+ partial_page = usb_offset & (PAGE_CACHE_SIZE - 1);
-+ if (partial_page > 0)
-+ amount = min(amount,
-+ (unsigned int) PAGE_CACHE_SIZE - partial_page);
-+
-+ if (amount == 0) {
-+ get_some_more = 0;
-+ curlun->sense_data =
-+ SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
-+ curlun->sense_data_info = usb_offset >> 9;
-+ curlun->info_valid = 1;
-+ continue;
-+ }
-+ amount -= (amount & 511);
-+ if (amount == 0) {
-+
-+ /* Why were we were asked to transfer a
-+ * partial block? */
-+ get_some_more = 0;
-+ continue;
-+ }
-+
-+ /* Get the next buffer */
-+ usb_offset += amount;
-+ fsg->usb_amount_left -= amount;
-+ amount_left_to_req -= amount;
-+ if (amount_left_to_req == 0)
-+ get_some_more = 0;
-+
-+ /* amount is always divisible by 512, hence by
-+ * the bulk-out maxpacket size */
-+ bh->outreq->length = bh->bulk_out_intended_length =
-+ amount;
-+ start_transfer(fsg, fsg->bulk_out, bh->outreq,
-+ &bh->outreq_busy, &bh->state);
-+ fsg->next_buffhd_to_fill = bh->next;
-+ continue;
-+ }
-+
-+ /* Write the received data to the backing file */
-+ bh = fsg->next_buffhd_to_drain;
-+ if (bh->state == BUF_STATE_EMPTY && !get_some_more)
-+ break; /* We stopped early */
-+ if (bh->state == BUF_STATE_FULL) {
-+ smp_rmb();
-+ fsg->next_buffhd_to_drain = bh->next;
-+ bh->state = BUF_STATE_EMPTY;
-+
-+ /* Did something go wrong with the transfer? */
-+ if (bh->outreq->status != 0) {
-+ curlun->sense_data = SS_COMMUNICATION_FAILURE;
-+ curlun->sense_data_info = file_offset >> 9;
-+ curlun->info_valid = 1;
-+ break;
-+ }
-+
-+ amount = bh->outreq->actual;
-+ if (curlun->file_length - file_offset < amount) {
-+ LERROR(curlun,
-+ "write %u @ %llu beyond end %llu\n",
-+ amount, (unsigned long long) file_offset,
-+ (unsigned long long) curlun->file_length);
-+ amount = curlun->file_length - file_offset;
-+ }
-+
-+ /* Perform the write */
-+ file_offset_tmp = file_offset;
-+ nwritten = vfs_write(curlun->filp,
-+ (char __user *) bh->buf,
-+ amount, &file_offset_tmp);
-+ VLDBG(curlun, "file write %u @ %llu -> %d\n", amount,
-+ (unsigned long long) file_offset,
-+ (int) nwritten);
-+ if (signal_pending(current))
-+ return -EINTR; /* Interrupted! */
-+
-+ if (nwritten < 0) {
-+ LDBG(curlun, "error in file write: %d\n",
-+ (int) nwritten);
-+ nwritten = 0;
-+ } else if (nwritten < amount) {
-+ LDBG(curlun, "partial file write: %d/%u\n",
-+ (int) nwritten, amount);
-+ nwritten -= (nwritten & 511);
-+ /* Round down to a block */
-+ }
-+ file_offset += nwritten;
-+ amount_left_to_write -= nwritten;
-+ fsg->residue -= nwritten;
-+
-+ /* If an error occurred, report it and its position */
-+ if (nwritten < amount) {
-+ curlun->sense_data = SS_WRITE_ERROR;
-+ curlun->sense_data_info = file_offset >> 9;
-+ curlun->info_valid = 1;
-+ break;
-+ }
-+
-+ /* Did the host decide to stop early? */
-+ if (bh->outreq->actual != bh->outreq->length) {
-+ fsg->short_packet_received = 1;
-+ break;
-+ }
-+ continue;
-+ }
-+
-+ /* Wait for something to happen */
-+ rc = sleep_thread(fsg);
-+ if (rc)
-+ return rc;
-+ }
-+
-+ return -EIO; /* No default reply */
-+}
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+/* Sync the file data, don't bother with the metadata.
-+ * The caller must own fsg->filesem.
-+ * This code was copied from fs/buffer.c:sys_fdatasync(). */
-+static int fsync_sub(struct lun *curlun)
-+{
-+ struct file *filp = curlun->filp;
-+ struct inode *inode;
-+ int rc, err;
-+
-+ if (curlun->ro || !filp)
-+ return 0;
-+ if (!filp->f_op->fsync)
-+ return -EINVAL;
-+
-+ inode = filp->f_path.dentry->d_inode;
-+ mutex_lock(&inode->i_mutex);
-+ rc = filemap_fdatawrite(inode->i_mapping);
-+ err = filp->f_op->fsync(filp, filp->f_path.dentry, 1);
-+ if (!rc)
-+ rc = err;
-+ err = filemap_fdatawait(inode->i_mapping);
-+ if (!rc)
-+ rc = err;
-+ mutex_unlock(&inode->i_mutex);
-+ VLDBG(curlun, "fdatasync -> %d\n", rc);
-+ return rc;
-+}
-+
-+static void fsync_all(struct fsg_dev *fsg)
-+{
-+ int i;
-+
-+ for (i = 0; i < fsg->nluns; ++i)
-+ fsync_sub(&fsg->luns[i]);
-+}
-+
-+static int do_synchronize_cache(struct fsg_dev *fsg)
-+{
-+ struct lun *curlun = fsg->curlun;
-+ int rc;
-+
-+ /* We ignore the requested LBA and write out all file's
-+ * dirty data buffers. */
-+ rc = fsync_sub(curlun);
-+ if (rc)
-+ curlun->sense_data = SS_WRITE_ERROR;
-+ return 0;
-+}
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+static void invalidate_sub(struct lun *curlun)
-+{
-+ struct file *filp = curlun->filp;
-+ struct inode *inode = filp->f_path.dentry->d_inode;
-+ unsigned long rc;
-+
-+ rc = invalidate_mapping_pages(inode->i_mapping, 0, -1);
-+ VLDBG(curlun, "invalidate_inode_pages -> %ld\n", rc);
-+}
-+
-+static int do_verify(struct fsg_dev *fsg)
-+{
-+ struct lun *curlun = fsg->curlun;
-+ u32 lba;
-+ u32 verification_length;
-+ struct fsg_buffhd *bh = fsg->next_buffhd_to_fill;
-+ loff_t file_offset, file_offset_tmp;
-+ u32 amount_left;
-+ unsigned int amount;
-+ ssize_t nread;
-+
-+ /* Get the starting Logical Block Address and check that it's
-+ * not too big */
-+ lba = get_be32(&fsg->cmnd[2]);
-+ if (lba >= curlun->num_sectors) {
-+ curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
-+ return -EINVAL;
-+ }
-+
-+ /* We allow DPO (Disable Page Out = don't save data in the
-+ * cache) but we don't implement it. */
-+ if ((fsg->cmnd[1] & ~0x10) != 0) {
-+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
-+ return -EINVAL;
-+ }
-+
-+ verification_length = get_be16(&fsg->cmnd[7]);
-+ if (unlikely(verification_length == 0))
-+ return -EIO; /* No default reply */
-+
-+ /* Prepare to carry out the file verify */
-+ amount_left = verification_length << 9;
-+ file_offset = ((loff_t) lba) << 9;
-+
-+ /* Write out all the dirty buffers before invalidating them */
-+ fsync_sub(curlun);
-+ if (signal_pending(current))
-+ return -EINTR;
-+
-+ invalidate_sub(curlun);
-+ if (signal_pending(current))
-+ return -EINTR;
-+
-+ /* Just try to read the requested blocks */
-+ while (amount_left > 0) {
-+
-+ /* Figure out how much we need to read:
-+ * Try to read the remaining amount, but not more than
-+ * the buffer size.
-+ * And don't try to read past the end of the file.
-+ * If this means reading 0 then we were asked to read
-+ * past the end of file. */
-+ amount = min((unsigned int) amount_left,
-+ (unsigned int)fsg->buf_size);
-+ amount = min((loff_t) amount,
-+ curlun->file_length - file_offset);
-+ if (amount == 0) {
-+ curlun->sense_data =
-+ SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
-+ curlun->sense_data_info = file_offset >> 9;
-+ curlun->info_valid = 1;
-+ break;
-+ }
-+
-+ /* Perform the read */
-+ file_offset_tmp = file_offset;
-+ nread = vfs_read(curlun->filp,
-+ (char __user *) bh->buf,
-+ amount, &file_offset_tmp);
-+ VLDBG(curlun, "file read %u @ %llu -> %d\n", amount,
-+ (unsigned long long) file_offset,
-+ (int) nread);
-+ if (signal_pending(current))
-+ return -EINTR;
-+
-+ if (nread < 0) {
-+ LDBG(curlun, "error in file verify: %d\n",
-+ (int) nread);
-+ nread = 0;
-+ } else if (nread < amount) {
-+ LDBG(curlun, "partial file verify: %d/%u\n",
-+ (int) nread, amount);
-+ nread -= (nread & 511); /* Round down to a sector */
-+ }
-+ if (nread == 0) {
-+ curlun->sense_data = SS_UNRECOVERED_READ_ERROR;
-+ curlun->sense_data_info = file_offset >> 9;
-+ curlun->info_valid = 1;
-+ break;
-+ }
-+ file_offset += nread;
-+ amount_left -= nread;
-+ }
-+ return 0;
-+}
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+static int do_inquiry(struct fsg_dev *fsg, struct fsg_buffhd *bh)
-+{
-+ u8 *buf = (u8 *) bh->buf;
-+
-+ if (!fsg->curlun) { /* Unsupported LUNs are okay */
-+ fsg->bad_lun_okay = 1;
-+ memset(buf, 0, 36);
-+ buf[0] = 0x7f; /* Unsupported, no device-type */
-+ return 36;
-+ }
-+
-+ memset(buf, 0, 8); /* Non-removable, direct-access device */
-+
-+ buf[1] = 0x80; /* set removable bit */
-+ buf[2] = 2; /* ANSI SCSI level 2 */
-+ buf[3] = 2; /* SCSI-2 INQUIRY data format */
-+ buf[4] = 31; /* Additional length */
-+ /* No special options */
-+ sprintf(buf + 8, "%-8s%-16s%04x", fsg->vendor,
-+ fsg->product, fsg->release);
-+ return 36;
-+}
-+
-+
-+static int do_request_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
-+{
-+ struct lun *curlun = fsg->curlun;
-+ u8 *buf = (u8 *) bh->buf;
-+ u32 sd, sdinfo;
-+ int valid;
-+
-+ /*
-+ * From the SCSI-2 spec., section 7.9 (Unit attention condition):
-+ *
-+ * If a REQUEST SENSE command is received from an initiator
-+ * with a pending unit attention condition (before the target
-+ * generates the contingent allegiance condition), then the
-+ * target shall either:
-+ * a) report any pending sense data and preserve the unit
-+ * attention condition on the logical unit, or,
-+ * b) report the unit attention condition, may discard any
-+ * pending sense data, and clear the unit attention
-+ * condition on the logical unit for that initiator.
-+ *
-+ * FSG normally uses option a); enable this code to use option b).
-+ */
-+#if 0
-+ if (curlun && curlun->unit_attention_data != SS_NO_SENSE) {
-+ curlun->sense_data = curlun->unit_attention_data;
-+ curlun->unit_attention_data = SS_NO_SENSE;
-+ }
-+#endif
-+
-+ if (!curlun) { /* Unsupported LUNs are okay */
-+ fsg->bad_lun_okay = 1;
-+ sd = SS_LOGICAL_UNIT_NOT_SUPPORTED;
-+ sdinfo = 0;
-+ valid = 0;
-+ } else {
-+ sd = curlun->sense_data;
-+ sdinfo = curlun->sense_data_info;
-+ valid = curlun->info_valid << 7;
-+ curlun->sense_data = SS_NO_SENSE;
-+ curlun->sense_data_info = 0;
-+ curlun->info_valid = 0;
-+ }
-+
-+ memset(buf, 0, 18);
-+ buf[0] = valid | 0x70; /* Valid, current error */
-+ buf[2] = SK(sd);
-+ put_be32(&buf[3], sdinfo); /* Sense information */
-+ buf[7] = 18 - 8; /* Additional sense length */
-+ buf[12] = ASC(sd);
-+ buf[13] = ASCQ(sd);
-+ return 18;
-+}
-+
-+
-+static int do_read_capacity(struct fsg_dev *fsg, struct fsg_buffhd *bh)
-+{
-+ struct lun *curlun = fsg->curlun;
-+ u32 lba = get_be32(&fsg->cmnd[2]);
-+ int pmi = fsg->cmnd[8];
-+ u8 *buf = (u8 *) bh->buf;
-+
-+ /* Check the PMI and LBA fields */
-+ if (pmi > 1 || (pmi == 0 && lba != 0)) {
-+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
-+ return -EINVAL;
-+ }
-+
-+ put_be32(&buf[0], curlun->num_sectors - 1); /* Max logical block */
-+ put_be32(&buf[4], 512); /* Block length */
-+ return 8;
-+}
-+
-+
-+static int do_mode_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
-+{
-+ struct lun *curlun = fsg->curlun;
-+ int mscmnd = fsg->cmnd[0];
-+ u8 *buf = (u8 *) bh->buf;
-+ u8 *buf0 = buf;
-+ int pc, page_code;
-+ int changeable_values, all_pages;
-+ int valid_page = 0;
-+ int len, limit;
-+
-+ if ((fsg->cmnd[1] & ~0x08) != 0) { /* Mask away DBD */
-+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
-+ return -EINVAL;
-+ }
-+ pc = fsg->cmnd[2] >> 6;
-+ page_code = fsg->cmnd[2] & 0x3f;
-+ if (pc == 3) {
-+ curlun->sense_data = SS_SAVING_PARAMETERS_NOT_SUPPORTED;
-+ return -EINVAL;
-+ }
-+ changeable_values = (pc == 1);
-+ all_pages = (page_code == 0x3f);
-+
-+ /* Write the mode parameter header. Fixed values are: default
-+ * medium type, no cache control (DPOFUA), and no block descriptors.
-+ * The only variable value is the WriteProtect bit. We will fill in
-+ * the mode data length later. */
-+ memset(buf, 0, 8);
-+ if (mscmnd == SC_MODE_SENSE_6) {
-+ buf[2] = (curlun->ro ? 0x80 : 0x00); /* WP, DPOFUA */
-+ buf += 4;
-+ limit = 255;
-+ } else { /* SC_MODE_SENSE_10 */
-+ buf[3] = (curlun->ro ? 0x80 : 0x00); /* WP, DPOFUA */
-+ buf += 8;
-+ limit = 65535;
-+ }
-+
-+ /* No block descriptors */
-+
-+ /* Disabled to workaround USB reset problems with a Vista host.
-+ */
-+#if 0
-+ /* The mode pages, in numerical order. The only page we support
-+ * is the Caching page. */
-+ if (page_code == 0x08 || all_pages) {
-+ valid_page = 1;
-+ buf[0] = 0x08; /* Page code */
-+ buf[1] = 10; /* Page length */
-+ memset(buf+2, 0, 10); /* None of the fields are changeable */
-+
-+ if (!changeable_values) {
-+ buf[2] = 0x04; /* Write cache enable, */
-+ /* Read cache not disabled */
-+ /* No cache retention priorities */
-+ put_be16(&buf[4], 0xffff); /* Don't disable prefetch */
-+ /* Minimum prefetch = 0 */
-+ put_be16(&buf[8], 0xffff); /* Maximum prefetch */
-+ /* Maximum prefetch ceiling */
-+ put_be16(&buf[10], 0xffff);
-+ }
-+ buf += 12;
-+ }
-+#else
-+ valid_page = 1;
-+#endif
-+
-+ /* Check that a valid page was requested and the mode data length
-+ * isn't too long. */
-+ len = buf - buf0;
-+ if (!valid_page || len > limit) {
-+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
-+ return -EINVAL;
-+ }
-+
-+ /* Store the mode data length */
-+ if (mscmnd == SC_MODE_SENSE_6)
-+ buf0[0] = len - 1;
-+ else
-+ put_be16(buf0, len - 2);
-+ return len;
-+}
-+
-+static int do_start_stop(struct fsg_dev *fsg)
-+{
-+ struct lun *curlun = fsg->curlun;
-+ int loej, start;
-+
-+ /* int immed = fsg->cmnd[1] & 0x01; */
-+ loej = fsg->cmnd[4] & 0x02;
-+ start = fsg->cmnd[4] & 0x01;
-+
-+ if (loej) {
-+ /* eject request from the host */
-+ if (backing_file_is_open(curlun)) {
-+ close_backing_file(fsg, curlun);
-+ curlun->unit_attention_data = SS_MEDIUM_NOT_PRESENT;
-+ }
-+ }
-+
-+ return 0;
-+}
-+
-+static int do_prevent_allow(struct fsg_dev *fsg)
-+{
-+ struct lun *curlun = fsg->curlun;
-+ int prevent;
-+
-+ prevent = fsg->cmnd[4] & 0x01;
-+ if ((fsg->cmnd[4] & ~0x01) != 0) { /* Mask away Prevent */
-+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
-+ return -EINVAL;
-+ }
-+
-+ if (curlun->prevent_medium_removal && !prevent)
-+ fsync_sub(curlun);
-+ curlun->prevent_medium_removal = prevent;
-+ return 0;
-+}
-+
-+
-+static int do_read_format_capacities(struct fsg_dev *fsg,
-+ struct fsg_buffhd *bh)
-+{
-+ struct lun *curlun = fsg->curlun;
-+ u8 *buf = (u8 *) bh->buf;
-+
-+ buf[0] = buf[1] = buf[2] = 0;
-+ buf[3] = 8; /* Only the Current/Maximum Capacity Descriptor */
-+ buf += 4;
-+
-+ put_be32(&buf[0], curlun->num_sectors); /* Number of blocks */
-+ put_be32(&buf[4], 512); /* Block length */
-+ buf[4] = 0x02; /* Current capacity */
-+ return 12;
-+}
-+
-+
-+static int do_mode_select(struct fsg_dev *fsg, struct fsg_buffhd *bh)
-+{
-+ struct lun *curlun = fsg->curlun;
-+
-+ /* We don't support MODE SELECT */
-+ curlun->sense_data = SS_INVALID_COMMAND;
-+ return -EINVAL;
-+}
-+
-+
-+/*-------------------------------------------------------------------------*/
-+#if 0
-+static int write_zero(struct fsg_dev *fsg)
-+{
-+ struct fsg_buffhd *bh;
-+ int rc;
-+
-+ DBG(fsg, "write_zero\n");
-+ /* Wait for the next buffer to become available */
-+ bh = fsg->next_buffhd_to_fill;
-+ while (bh->state != BUF_STATE_EMPTY) {
-+ rc = sleep_thread(fsg);
-+ if (rc)
-+ return rc;
-+ }
-+
-+ bh->inreq->length = 0;
-+ start_transfer(fsg, fsg->bulk_in, bh->inreq,
-+ &bh->inreq_busy, &bh->state);
-+
-+ fsg->next_buffhd_to_fill = bh->next;
-+ return 0;
-+}
-+#endif
-+
-+static int throw_away_data(struct fsg_dev *fsg)
-+{
-+ struct fsg_buffhd *bh;
-+ u32 amount;
-+ int rc;
-+
-+ DBG(fsg, "throw_away_data\n");
-+ while ((bh = fsg->next_buffhd_to_drain)->state != BUF_STATE_EMPTY ||
-+ fsg->usb_amount_left > 0) {
-+
-+ /* Throw away the data in a filled buffer */
-+ if (bh->state == BUF_STATE_FULL) {
-+ smp_rmb();
-+ bh->state = BUF_STATE_EMPTY;
-+ fsg->next_buffhd_to_drain = bh->next;
-+
-+ /* A short packet or an error ends everything */
-+ if (bh->outreq->actual != bh->outreq->length ||
-+ bh->outreq->status != 0) {
-+ raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT);
-+ return -EINTR;
-+ }
-+ continue;
-+ }
-+
-+ /* Try to submit another request if we need one */
-+ bh = fsg->next_buffhd_to_fill;
-+ if (bh->state == BUF_STATE_EMPTY && fsg->usb_amount_left > 0) {
-+ amount = min(fsg->usb_amount_left, (u32) fsg->buf_size);
-+
-+ /* amount is always divisible by 512, hence by
-+ * the bulk-out maxpacket size */
-+ bh->outreq->length = bh->bulk_out_intended_length =
-+ amount;
-+ start_transfer(fsg, fsg->bulk_out, bh->outreq,
-+ &bh->outreq_busy, &bh->state);
-+ fsg->next_buffhd_to_fill = bh->next;
-+ fsg->usb_amount_left -= amount;
-+ continue;
-+ }
-+
-+ /* Otherwise wait for something to happen */
-+ rc = sleep_thread(fsg);
-+ if (rc)
-+ return rc;
-+ }
-+ return 0;
-+}
-+
-+
-+static int finish_reply(struct fsg_dev *fsg)
-+{
-+ struct fsg_buffhd *bh = fsg->next_buffhd_to_fill;
-+ int rc = 0;
-+
-+ switch (fsg->data_dir) {
-+ case DATA_DIR_NONE:
-+ break; /* Nothing to send */
-+
-+ case DATA_DIR_UNKNOWN:
-+ rc = -EINVAL;
-+ break;
-+
-+ /* All but the last buffer of data must have already been sent */
-+ case DATA_DIR_TO_HOST:
-+ if (fsg->data_size == 0)
-+ ; /* Nothing to send */
-+
-+ /* If there's no residue, simply send the last buffer */
-+ else if (fsg->residue == 0) {
-+ start_transfer(fsg, fsg->bulk_in, bh->inreq,
-+ &bh->inreq_busy, &bh->state);
-+ fsg->next_buffhd_to_fill = bh->next;
-+ } else {
-+ start_transfer(fsg, fsg->bulk_in, bh->inreq,
-+ &bh->inreq_busy, &bh->state);
-+ fsg->next_buffhd_to_fill = bh->next;
-+#if 0
-+ /* this is unnecessary, and was causing problems with MacOS */
-+ if (bh->inreq->length > 0)
-+ write_zero(fsg);
-+#endif
-+ }
-+ break;
-+
-+ /* We have processed all we want from the data the host has sent.
-+ * There may still be outstanding bulk-out requests. */
-+ case DATA_DIR_FROM_HOST:
-+ if (fsg->residue == 0)
-+ ; /* Nothing to receive */
-+
-+ /* Did the host stop sending unexpectedly early? */
-+ else if (fsg->short_packet_received) {
-+ raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT);
-+ rc = -EINTR;
-+ }
-+
-+ /* We haven't processed all the incoming data. Even though
-+ * we may be allowed to stall, doing so would cause a race.
-+ * The controller may already have ACK'ed all the remaining
-+ * bulk-out packets, in which case the host wouldn't see a
-+ * STALL. Not realizing the endpoint was halted, it wouldn't
-+ * clear the halt -- leading to problems later on. */
-+#if 0
-+ fsg_set_halt(fsg, fsg->bulk_out);
-+ raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT);
-+ rc = -EINTR;
-+#endif
-+
-+ /* We can't stall. Read in the excess data and throw it
-+ * all away. */
-+ else
-+ rc = throw_away_data(fsg);
-+ break;
-+ }
-+ return rc;
-+}
-+
-+
-+static int send_status(struct fsg_dev *fsg)
-+{
-+ struct lun *curlun = fsg->curlun;
-+ struct fsg_buffhd *bh;
-+ int rc;
-+ u8 status = USB_STATUS_PASS;
-+ u32 sd, sdinfo = 0;
-+ struct bulk_cs_wrap *csw;
-+
-+ DBG(fsg, "send_status\n");
-+ /* Wait for the next buffer to become available */
-+ bh = fsg->next_buffhd_to_fill;
-+ while (bh->state != BUF_STATE_EMPTY) {
-+ rc = sleep_thread(fsg);
-+ if (rc)
-+ return rc;
-+ }
-+
-+ if (curlun) {
-+ sd = curlun->sense_data;
-+ sdinfo = curlun->sense_data_info;
-+ } else if (fsg->bad_lun_okay)
-+ sd = SS_NO_SENSE;
-+ else
-+ sd = SS_LOGICAL_UNIT_NOT_SUPPORTED;
-+
-+ if (fsg->phase_error) {
-+ DBG(fsg, "sending phase-error status\n");
-+ status = USB_STATUS_PHASE_ERROR;
-+ sd = SS_INVALID_COMMAND;
-+ } else if (sd != SS_NO_SENSE) {
-+ DBG(fsg, "sending command-failure status\n");
-+ status = USB_STATUS_FAIL;
-+ VDBG(fsg, " sense data: SK x%02x, ASC x%02x, ASCQ x%02x;"
-+ " info x%x\n",
-+ SK(sd), ASC(sd), ASCQ(sd), sdinfo);
-+ }
-+
-+ csw = bh->buf;
-+
-+ /* Store and send the Bulk-only CSW */
-+ csw->Signature = __constant_cpu_to_le32(USB_BULK_CS_SIG);
-+ csw->Tag = fsg->tag;
-+ csw->Residue = cpu_to_le32(fsg->residue);
-+ csw->Status = status;
-+
-+ bh->inreq->length = USB_BULK_CS_WRAP_LEN;
-+ start_transfer(fsg, fsg->bulk_in, bh->inreq,
-+ &bh->inreq_busy, &bh->state);
-+
-+ fsg->next_buffhd_to_fill = bh->next;
-+ return 0;
-+}
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+/* Check whether the command is properly formed and whether its data size
-+ * and direction agree with the values we already have. */
-+static int check_command(struct fsg_dev *fsg, int cmnd_size,
-+ enum data_direction data_dir, unsigned int mask,
-+ int needs_medium, const char *name)
-+{
-+ int i;
-+ int lun = fsg->cmnd[1] >> 5;
-+ static const char dirletter[4] = {'u', 'o', 'i', 'n'};
-+ char hdlen[20];
-+ struct lun *curlun;
-+
-+ hdlen[0] = 0;
-+ if (fsg->data_dir != DATA_DIR_UNKNOWN)
-+ sprintf(hdlen, ", H%c=%u", dirletter[(int) fsg->data_dir],
-+ fsg->data_size);
-+ VDBG(fsg, "SCSI command: %s; Dc=%d, D%c=%u; Hc=%d%s\n",
-+ name, cmnd_size, dirletter[(int) data_dir],
-+ fsg->data_size_from_cmnd, fsg->cmnd_size, hdlen);
-+
-+ /* We can't reply at all until we know the correct data direction
-+ * and size. */
-+ if (fsg->data_size_from_cmnd == 0)
-+ data_dir = DATA_DIR_NONE;
-+ if (fsg->data_dir == DATA_DIR_UNKNOWN) { /* CB or CBI */
-+ fsg->data_dir = data_dir;
-+ fsg->data_size = fsg->data_size_from_cmnd;
-+
-+ } else { /* Bulk-only */
-+ if (fsg->data_size < fsg->data_size_from_cmnd) {
-+
-+ /* Host data size < Device data size is a phase error.
-+ * Carry out the command, but only transfer as much
-+ * as we are allowed. */
-+ DBG(fsg, "phase error 1\n");
-+ fsg->data_size_from_cmnd = fsg->data_size;
-+ fsg->phase_error = 1;
-+ }
-+ }
-+ fsg->residue = fsg->usb_amount_left = fsg->data_size;
-+
-+ /* Conflicting data directions is a phase error */
-+ if (fsg->data_dir != data_dir && fsg->data_size_from_cmnd > 0) {
-+ fsg->phase_error = 1;
-+ DBG(fsg, "phase error 2\n");
-+ return -EINVAL;
-+ }
-+
-+ /* Verify the length of the command itself */
-+ if (cmnd_size != fsg->cmnd_size) {
-+
-+ /* Special case workaround: MS-Windows issues REQUEST SENSE
-+ * with cbw->Length == 12 (it should be 6). */
-+ if (fsg->cmnd[0] == SC_REQUEST_SENSE && fsg->cmnd_size == 12)
-+ cmnd_size = fsg->cmnd_size;
-+ else {
-+ fsg->phase_error = 1;
-+ return -EINVAL;
-+ }
-+ }
-+
-+ /* Check that the LUN values are consistent */
-+ if (fsg->lun != lun)
-+ DBG(fsg, "using LUN %d from CBW, "
-+ "not LUN %d from CDB\n",
-+ fsg->lun, lun);
-+
-+ /* Check the LUN */
-+ if (fsg->lun >= 0 && fsg->lun < fsg->nluns) {
-+ fsg->curlun = curlun = &fsg->luns[fsg->lun];
-+ if (fsg->cmnd[0] != SC_REQUEST_SENSE) {
-+ curlun->sense_data = SS_NO_SENSE;
-+ curlun->sense_data_info = 0;
-+ curlun->info_valid = 0;
-+ }
-+ } else {
-+ fsg->curlun = curlun = NULL;
-+ fsg->bad_lun_okay = 0;
-+
-+ /* INQUIRY and REQUEST SENSE commands are explicitly allowed
-+ * to use unsupported LUNs; all others may not. */
-+ if (fsg->cmnd[0] != SC_INQUIRY &&
-+ fsg->cmnd[0] != SC_REQUEST_SENSE) {
-+ DBG(fsg, "unsupported LUN %d\n", fsg->lun);
-+ return -EINVAL;
-+ }
-+ }
-+
-+ /* If a unit attention condition exists, only INQUIRY and
-+ * REQUEST SENSE commands are allowed; anything else must fail. */
-+ if (curlun && curlun->unit_attention_data != SS_NO_SENSE &&
-+ fsg->cmnd[0] != SC_INQUIRY &&
-+ fsg->cmnd[0] != SC_REQUEST_SENSE) {
-+ curlun->sense_data = curlun->unit_attention_data;
-+ curlun->unit_attention_data = SS_NO_SENSE;
-+ return -EINVAL;
-+ }
-+
-+ /* Check that only command bytes listed in the mask are non-zero */
-+ fsg->cmnd[1] &= 0x1f; /* Mask away the LUN */
-+ for (i = 1; i < cmnd_size; ++i) {
-+ if (fsg->cmnd[i] && !(mask & (1 << i))) {
-+ if (curlun)
-+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
-+ DBG(fsg, "SS_INVALID_FIELD_IN_CDB\n");
-+ return -EINVAL;
-+ }
-+ }
-+
-+ /* If the medium isn't mounted and the command needs to access
-+ * it, return an error. */
-+ if (curlun && !backing_file_is_open(curlun) && needs_medium) {
-+ curlun->sense_data = SS_MEDIUM_NOT_PRESENT;
-+ DBG(fsg, "SS_MEDIUM_NOT_PRESENT\n");
-+ return -EINVAL;
-+ }
-+
-+ return 0;
-+}
-+
-+
-+static int do_scsi_command(struct fsg_dev *fsg)
-+{
-+ struct fsg_buffhd *bh;
-+ int rc;
-+ int reply = -EINVAL;
-+ int i;
-+ static char unknown[16];
-+
-+ dump_cdb(fsg);
-+
-+ /* Wait for the next buffer to become available for data or status */
-+ bh = fsg->next_buffhd_to_drain = fsg->next_buffhd_to_fill;
-+ while (bh->state != BUF_STATE_EMPTY) {
-+ rc = sleep_thread(fsg);
-+ if (rc)
-+ return rc;
-+ }
-+ fsg->phase_error = 0;
-+ fsg->short_packet_received = 0;
-+
-+ down_read(&fsg->filesem); /* We're using the backing file */
-+ switch (fsg->cmnd[0]) {
-+
-+ case SC_INQUIRY:
-+ fsg->data_size_from_cmnd = fsg->cmnd[4];
-+ if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
-+ (1<<4), 0,
-+ "INQUIRY")) == 0)
-+ reply = do_inquiry(fsg, bh);
-+ break;
-+
-+ case SC_MODE_SELECT_6:
-+ fsg->data_size_from_cmnd = fsg->cmnd[4];
-+ if ((reply = check_command(fsg, 6, DATA_DIR_FROM_HOST,
-+ (1<<1) | (1<<4), 0,
-+ "MODE SELECT(6)")) == 0)
-+ reply = do_mode_select(fsg, bh);
-+ break;
-+
-+ case SC_MODE_SELECT_10:
-+ fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]);
-+ if ((reply = check_command(fsg, 10, DATA_DIR_FROM_HOST,
-+ (1<<1) | (3<<7), 0,
-+ "MODE SELECT(10)")) == 0)
-+ reply = do_mode_select(fsg, bh);
-+ break;
-+
-+ case SC_MODE_SENSE_6:
-+ fsg->data_size_from_cmnd = fsg->cmnd[4];
-+ if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
-+ (1<<1) | (1<<2) | (1<<4), 0,
-+ "MODE SENSE(6)")) == 0)
-+ reply = do_mode_sense(fsg, bh);
-+ break;
-+
-+ case SC_MODE_SENSE_10:
-+ fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]);
-+ if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
-+ (1<<1) | (1<<2) | (3<<7), 0,
-+ "MODE SENSE(10)")) == 0)
-+ reply = do_mode_sense(fsg, bh);
-+ break;
-+
-+ case SC_PREVENT_ALLOW_MEDIUM_REMOVAL:
-+ fsg->data_size_from_cmnd = 0;
-+ if ((reply = check_command(fsg, 6, DATA_DIR_NONE,
-+ (1<<4), 0,
-+ "PREVENT-ALLOW MEDIUM REMOVAL")) == 0)
-+ reply = do_prevent_allow(fsg);
-+ break;
-+
-+ case SC_READ_6:
-+ i = fsg->cmnd[4];
-+ fsg->data_size_from_cmnd = (i == 0 ? 256 : i) << 9;
-+ if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
-+ (7<<1) | (1<<4), 1,
-+ "READ(6)")) == 0)
-+ reply = do_read(fsg);
-+ break;
-+
-+ case SC_READ_10:
-+ fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]) << 9;
-+ if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
-+ (1<<1) | (0xf<<2) | (3<<7), 1,
-+ "READ(10)")) == 0)
-+ reply = do_read(fsg);
-+ break;
-+
-+ case SC_READ_12:
-+ fsg->data_size_from_cmnd = get_be32(&fsg->cmnd[6]) << 9;
-+ if ((reply = check_command(fsg, 12, DATA_DIR_TO_HOST,
-+ (1<<1) | (0xf<<2) | (0xf<<6), 1,
-+ "READ(12)")) == 0)
-+ reply = do_read(fsg);
-+ break;
-+
-+ case SC_READ_CAPACITY:
-+ fsg->data_size_from_cmnd = 8;
-+ if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
-+ (0xf<<2) | (1<<8), 1,
-+ "READ CAPACITY")) == 0)
-+ reply = do_read_capacity(fsg, bh);
-+ break;
-+
-+ case SC_READ_FORMAT_CAPACITIES:
-+ fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]);
-+ if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
-+ (3<<7), 1,
-+ "READ FORMAT CAPACITIES")) == 0)
-+ reply = do_read_format_capacities(fsg, bh);
-+ break;
-+
-+ case SC_REQUEST_SENSE:
-+ fsg->data_size_from_cmnd = fsg->cmnd[4];
-+ if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
-+ (1<<4), 0,
-+ "REQUEST SENSE")) == 0)
-+ reply = do_request_sense(fsg, bh);
-+ break;
-+
-+ case SC_START_STOP_UNIT:
-+ fsg->data_size_from_cmnd = 0;
-+ if ((reply = check_command(fsg, 6, DATA_DIR_NONE,
-+ (1<<1) | (1<<4), 0,
-+ "START-STOP UNIT")) == 0)
-+ reply = do_start_stop(fsg);
-+ break;
-+
-+ case SC_SYNCHRONIZE_CACHE:
-+ fsg->data_size_from_cmnd = 0;
-+ if ((reply = check_command(fsg, 10, DATA_DIR_NONE,
-+ (0xf<<2) | (3<<7), 1,
-+ "SYNCHRONIZE CACHE")) == 0)
-+ reply = do_synchronize_cache(fsg);
-+ break;
-+
-+ case SC_TEST_UNIT_READY:
-+ fsg->data_size_from_cmnd = 0;
-+ reply = check_command(fsg, 6, DATA_DIR_NONE,
-+ 0, 1,
-+ "TEST UNIT READY");
-+ break;
-+
-+ /* Although optional, this command is used by MS-Windows. We
-+ * support a minimal version: BytChk must be 0. */
-+ case SC_VERIFY:
-+ fsg->data_size_from_cmnd = 0;
-+ if ((reply = check_command(fsg, 10, DATA_DIR_NONE,
-+ (1<<1) | (0xf<<2) | (3<<7), 1,
-+ "VERIFY")) == 0)
-+ reply = do_verify(fsg);
-+ break;
-+
-+ case SC_WRITE_6:
-+ i = fsg->cmnd[4];
-+ fsg->data_size_from_cmnd = (i == 0 ? 256 : i) << 9;
-+ if ((reply = check_command(fsg, 6, DATA_DIR_FROM_HOST,
-+ (7<<1) | (1<<4), 1,
-+ "WRITE(6)")) == 0)
-+ reply = do_write(fsg);
-+ break;
-+
-+ case SC_WRITE_10:
-+ fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]) << 9;
-+ if ((reply = check_command(fsg, 10, DATA_DIR_FROM_HOST,
-+ (1<<1) | (0xf<<2) | (3<<7), 1,
-+ "WRITE(10)")) == 0)
-+ reply = do_write(fsg);
-+ break;
-+
-+ case SC_WRITE_12:
-+ fsg->data_size_from_cmnd = get_be32(&fsg->cmnd[6]) << 9;
-+ if ((reply = check_command(fsg, 12, DATA_DIR_FROM_HOST,
-+ (1<<1) | (0xf<<2) | (0xf<<6), 1,
-+ "WRITE(12)")) == 0)
-+ reply = do_write(fsg);
-+ break;
-+
-+ /* Some mandatory commands that we recognize but don't implement.
-+ * They don't mean much in this setting. It's left as an exercise
-+ * for anyone interested to implement RESERVE and RELEASE in terms
-+ * of Posix locks. */
-+ case SC_FORMAT_UNIT:
-+ case SC_RELEASE:
-+ case SC_RESERVE:
-+ case SC_SEND_DIAGNOSTIC:
-+ /* Fall through */
-+
-+ default:
-+ fsg->data_size_from_cmnd = 0;
-+ sprintf(unknown, "Unknown x%02x", fsg->cmnd[0]);
-+ if ((reply = check_command(fsg, fsg->cmnd_size,
-+ DATA_DIR_UNKNOWN, 0xff, 0, unknown)) == 0) {
-+ fsg->curlun->sense_data = SS_INVALID_COMMAND;
-+ reply = -EINVAL;
-+ }
-+ break;
-+ }
-+ up_read(&fsg->filesem);
-+
-+ VDBG(fsg, "reply: %d, fsg->data_size_from_cmnd: %d\n",
-+ reply, fsg->data_size_from_cmnd);
-+ if (reply == -EINTR || signal_pending(current))
-+ return -EINTR;
-+
-+ /* Set up the single reply buffer for finish_reply() */
-+ if (reply == -EINVAL)
-+ reply = 0; /* Error reply length */
-+ if (reply >= 0 && fsg->data_dir == DATA_DIR_TO_HOST) {
-+ reply = min((u32) reply, fsg->data_size_from_cmnd);
-+ bh->inreq->length = reply;
-+ bh->state = BUF_STATE_FULL;
-+ fsg->residue -= reply;
-+ } /* Otherwise it's already set */
-+
-+ return 0;
-+}
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+static int received_cbw(struct fsg_dev *fsg, struct fsg_buffhd *bh)
-+{
-+ struct usb_request *req = bh->outreq;
-+ struct bulk_cb_wrap *cbw = req->buf;
-+
-+ /* Was this a real packet? */
-+ if (req->status)
-+ return -EINVAL;
-+
-+ /* Is the CBW valid? */
-+ if (req->actual != USB_BULK_CB_WRAP_LEN ||
-+ cbw->Signature != __constant_cpu_to_le32(
-+ USB_BULK_CB_SIG)) {
-+ DBG(fsg, "invalid CBW: len %u sig 0x%x\n",
-+ req->actual,
-+ le32_to_cpu(cbw->Signature));
-+ return -EINVAL;
-+ }
-+
-+ /* Is the CBW meaningful? */
-+ if (cbw->Lun >= MAX_LUNS || cbw->Flags & ~USB_BULK_IN_FLAG ||
-+ cbw->Length <= 0 || cbw->Length > MAX_COMMAND_SIZE) {
-+ DBG(fsg, "non-meaningful CBW: lun = %u, flags = 0x%x, "
-+ "cmdlen %u\n",
-+ cbw->Lun, cbw->Flags, cbw->Length);
-+ return -EINVAL;
-+ }
-+
-+ /* Save the command for later */
-+ fsg->cmnd_size = cbw->Length;
-+ memcpy(fsg->cmnd, cbw->CDB, fsg->cmnd_size);
-+ if (cbw->Flags & USB_BULK_IN_FLAG)
-+ fsg->data_dir = DATA_DIR_TO_HOST;
-+ else
-+ fsg->data_dir = DATA_DIR_FROM_HOST;
-+ fsg->data_size = le32_to_cpu(cbw->DataTransferLength);
-+ if (fsg->data_size == 0)
-+ fsg->data_dir = DATA_DIR_NONE;
-+ fsg->lun = cbw->Lun;
-+ fsg->tag = cbw->Tag;
-+ return 0;
-+}
-+
-+
-+static int get_next_command(struct fsg_dev *fsg)
-+{
-+ struct fsg_buffhd *bh;
-+ int rc = 0;
-+
-+ /* Wait for the next buffer to become available */
-+ bh = fsg->next_buffhd_to_fill;
-+ while (bh->state != BUF_STATE_EMPTY) {
-+ rc = sleep_thread(fsg);
-+ if (rc)
-+ return rc;
-+ }
-+
-+ /* Queue a request to read a Bulk-only CBW */
-+ set_bulk_out_req_length(fsg, bh, USB_BULK_CB_WRAP_LEN);
-+ start_transfer(fsg, fsg->bulk_out, bh->outreq,
-+ &bh->outreq_busy, &bh->state);
-+
-+ /* We will drain the buffer in software, which means we
-+ * can reuse it for the next filling. No need to advance
-+ * next_buffhd_to_fill. */
-+
-+ /* Wait for the CBW to arrive */
-+ while (bh->state != BUF_STATE_FULL) {
-+ rc = sleep_thread(fsg);
-+ if (rc)
-+ return rc;
-+ }
-+ smp_rmb();
-+ rc = received_cbw(fsg, bh);
-+ bh->state = BUF_STATE_EMPTY;
-+
-+ return rc;
-+}
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+static int enable_endpoint(struct fsg_dev *fsg, struct usb_ep *ep,
-+ const struct usb_endpoint_descriptor *d)
-+{
-+ int rc;
-+
-+ DBG(fsg, "usb_ep_enable %s\n", ep->name);
-+ ep->driver_data = fsg;
-+ rc = usb_ep_enable(ep, d);
-+ if (rc)
-+ ERROR(fsg, "can't enable %s, result %d\n", ep->name, rc);
-+ return rc;
-+}
-+
-+static int alloc_request(struct fsg_dev *fsg, struct usb_ep *ep,
-+ struct usb_request **preq)
-+{
-+ *preq = usb_ep_alloc_request(ep, GFP_ATOMIC);
-+ if (*preq)
-+ return 0;
-+ ERROR(fsg, "can't allocate request for %s\n", ep->name);
-+ return -ENOMEM;
-+}
-+
-+/*
-+ * Reset interface setting and re-init endpoint state (toggle etc).
-+ * Call with altsetting < 0 to disable the interface. The only other
-+ * available altsetting is 0, which enables the interface.
-+ */
-+static int do_set_interface(struct fsg_dev *fsg, int altsetting)
-+{
-+ struct usb_composite_dev *cdev = fsg->cdev;
-+ int rc = 0;
-+ int i;
-+ const struct usb_endpoint_descriptor *d;
-+
-+ if (fsg->running)
-+ DBG(fsg, "reset interface\n");
-+
-+reset:
-+ /* Deallocate the requests */
-+ for (i = 0; i < NUM_BUFFERS; ++i) {
-+ struct fsg_buffhd *bh = &fsg->buffhds[i];
-+
-+ if (bh->inreq) {
-+ usb_ep_free_request(fsg->bulk_in, bh->inreq);
-+ bh->inreq = NULL;
-+ }
-+ if (bh->outreq) {
-+ usb_ep_free_request(fsg->bulk_out, bh->outreq);
-+ bh->outreq = NULL;
-+ }
-+ }
-+
-+ /* Disable the endpoints */
-+ if (fsg->bulk_in_enabled) {
-+ DBG(fsg, "usb_ep_disable %s\n", fsg->bulk_in->name);
-+ usb_ep_disable(fsg->bulk_in);
-+ fsg->bulk_in_enabled = 0;
-+ }
-+ if (fsg->bulk_out_enabled) {
-+ DBG(fsg, "usb_ep_disable %s\n", fsg->bulk_out->name);
-+ usb_ep_disable(fsg->bulk_out);
-+ fsg->bulk_out_enabled = 0;
-+ }
-+
-+ fsg->running = 0;
-+ if (altsetting < 0 || rc != 0)
-+ return rc;
-+
-+ DBG(fsg, "set interface %d\n", altsetting);
-+
-+ /* Enable the endpoints */
-+ d = ep_desc(cdev->gadget, &fs_bulk_in_desc, &hs_bulk_in_desc);
-+ if ((rc = enable_endpoint(fsg, fsg->bulk_in, d)) != 0)
-+ goto reset;
-+ fsg->bulk_in_enabled = 1;
-+
-+ d = ep_desc(cdev->gadget, &fs_bulk_out_desc, &hs_bulk_out_desc);
-+ if ((rc = enable_endpoint(fsg, fsg->bulk_out, d)) != 0)
-+ goto reset;
-+ fsg->bulk_out_enabled = 1;
-+ fsg->bulk_out_maxpacket = le16_to_cpu(d->wMaxPacketSize);
-+
-+ /* Allocate the requests */
-+ for (i = 0; i < NUM_BUFFERS; ++i) {
-+ struct fsg_buffhd *bh = &fsg->buffhds[i];
-+
-+ rc = alloc_request(fsg, fsg->bulk_in, &bh->inreq);
-+ if (rc != 0)
-+ goto reset;
-+ rc = alloc_request(fsg, fsg->bulk_out, &bh->outreq);
-+ if (rc != 0)
-+ goto reset;
-+ bh->inreq->buf = bh->outreq->buf = bh->buf;
-+ bh->inreq->context = bh->outreq->context = bh;
-+ bh->inreq->complete = bulk_in_complete;
-+ bh->outreq->complete = bulk_out_complete;
-+ }
-+
-+ fsg->running = 1;
-+ for (i = 0; i < fsg->nluns; ++i)
-+ fsg->luns[i].unit_attention_data = SS_RESET_OCCURRED;
-+
-+ return rc;
-+}
-+
-+static void adjust_wake_lock(struct fsg_dev *fsg)
-+{
-+ int ums_active = 0;
-+ int i;
-+
-+ spin_lock_irq(&fsg->lock);
-+
-+ if (fsg->config) {
-+ for (i = 0; i < fsg->nluns; ++i) {
-+ if (backing_file_is_open(&fsg->luns[i]))
-+ ums_active = 1;
-+ }
-+ }
-+
-+ if (ums_active)
-+ wake_lock(&fsg->wake_lock);
-+ else
-+ wake_unlock(&fsg->wake_lock);
-+
-+ spin_unlock_irq(&fsg->lock);
-+}
-+
-+/*
-+ * Change our operational configuration. This code must agree with the code
-+ * that returns config descriptors, and with interface altsetting code.
-+ *
-+ * It's also responsible for power management interactions. Some
-+ * configurations might not work with our current power sources.
-+ * For now we just assume the gadget is always self-powered.
-+ */
-+static int do_set_config(struct fsg_dev *fsg, u8 new_config)
-+{
-+ int rc = 0;
-+
-+ if (new_config == fsg->config)
-+ return rc;
-+
-+ /* Disable the single interface */
-+ if (fsg->config != 0) {
-+ DBG(fsg, "reset config\n");
-+ fsg->config = 0;
-+ rc = do_set_interface(fsg, -1);
-+ }
-+
-+ /* Enable the interface */
-+ if (new_config != 0) {
-+ fsg->config = new_config;
-+ rc = do_set_interface(fsg, 0);
-+ if (rc != 0)
-+ fsg->config = 0; /* Reset on errors */
-+ else
-+ INFO(fsg, "config #%d\n", fsg->config);
-+ }
-+
-+ switch_set_state(&fsg->sdev, new_config);
-+ adjust_wake_lock(fsg);
-+ return rc;
-+}
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+static void handle_exception(struct fsg_dev *fsg)
-+{
-+ siginfo_t info;
-+ int sig;
-+ int i;
-+ struct fsg_buffhd *bh;
-+ enum fsg_state old_state;
-+ u8 new_config;
-+ struct lun *curlun;
-+ int rc;
-+
-+ DBG(fsg, "handle_exception state: %d\n", (int)fsg->state);
-+ /* Clear the existing signals. Anything but SIGUSR1 is converted
-+ * into a high-priority EXIT exception. */
-+ for (;;) {
-+ sig = dequeue_signal_lock(current, ¤t->blocked, &info);
-+ if (!sig)
-+ break;
-+ if (sig != SIGUSR1) {
-+ if (fsg->state < FSG_STATE_EXIT)
-+ DBG(fsg, "Main thread exiting on signal\n");
-+ raise_exception(fsg, FSG_STATE_EXIT);
-+ }
-+ }
-+
-+ /* Clear out the controller's fifos */
-+ if (fsg->bulk_in_enabled)
-+ usb_ep_fifo_flush(fsg->bulk_in);
-+ if (fsg->bulk_out_enabled)
-+ usb_ep_fifo_flush(fsg->bulk_out);
-+
-+ /* Reset the I/O buffer states and pointers, the SCSI
-+ * state, and the exception. Then invoke the handler. */
-+ spin_lock_irq(&fsg->lock);
-+
-+ for (i = 0; i < NUM_BUFFERS; ++i) {
-+ bh = &fsg->buffhds[i];
-+ bh->state = BUF_STATE_EMPTY;
-+ }
-+ fsg->next_buffhd_to_fill = fsg->next_buffhd_to_drain =
-+ &fsg->buffhds[0];
-+
-+ new_config = fsg->new_config;
-+ old_state = fsg->state;
-+
-+ if (old_state == FSG_STATE_ABORT_BULK_OUT)
-+ fsg->state = FSG_STATE_STATUS_PHASE;
-+ else {
-+ for (i = 0; i < fsg->nluns; ++i) {
-+ curlun = &fsg->luns[i];
-+ curlun->prevent_medium_removal = 0;
-+ curlun->sense_data = curlun->unit_attention_data =
-+ SS_NO_SENSE;
-+ curlun->sense_data_info = 0;
-+ curlun->info_valid = 0;
-+ }
-+ fsg->state = FSG_STATE_IDLE;
-+ }
-+ spin_unlock_irq(&fsg->lock);
-+
-+ /* Carry out any extra actions required for the exception */
-+ switch (old_state) {
-+ default:
-+ break;
-+
-+ case FSG_STATE_ABORT_BULK_OUT:
-+ DBG(fsg, "FSG_STATE_ABORT_BULK_OUT\n");
-+ spin_lock_irq(&fsg->lock);
-+ if (fsg->state == FSG_STATE_STATUS_PHASE)
-+ fsg->state = FSG_STATE_IDLE;
-+ spin_unlock_irq(&fsg->lock);
-+ break;
-+
-+ case FSG_STATE_RESET:
-+ /* really not much to do here */
-+ break;
-+
-+ case FSG_STATE_CONFIG_CHANGE:
-+ rc = do_set_config(fsg, new_config);
-+ if (new_config == 0) {
-+ /* We're using the backing file */
-+ down_read(&fsg->filesem);
-+ fsync_all(fsg);
-+ up_read(&fsg->filesem);
-+ }
-+ break;
-+
-+ case FSG_STATE_EXIT:
-+ case FSG_STATE_TERMINATED:
-+ do_set_config(fsg, 0); /* Free resources */
-+ spin_lock_irq(&fsg->lock);
-+ fsg->state = FSG_STATE_TERMINATED; /* Stop the thread */
-+ spin_unlock_irq(&fsg->lock);
-+ break;
-+ }
-+}
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+static int fsg_main_thread(void *fsg_)
-+{
-+ struct fsg_dev *fsg = fsg_;
-+
-+ /* Allow the thread to be killed by a signal, but set the signal mask
-+ * to block everything but INT, TERM, KILL, and USR1. */
-+ allow_signal(SIGINT);
-+ allow_signal(SIGTERM);
-+ allow_signal(SIGKILL);
-+ allow_signal(SIGUSR1);
-+
-+ /* Allow the thread to be frozen */
-+ set_freezable();
-+
-+ /* Arrange for userspace references to be interpreted as kernel
-+ * pointers. That way we can pass a kernel pointer to a routine
-+ * that expects a __user pointer and it will work okay. */
-+ set_fs(get_ds());
-+
-+ /* The main loop */
-+ while (fsg->state != FSG_STATE_TERMINATED) {
-+ if (exception_in_progress(fsg) || signal_pending(current)) {
-+ handle_exception(fsg);
-+ continue;
-+ }
-+
-+ if (!fsg->running) {
-+ sleep_thread(fsg);
-+ continue;
-+ }
-+
-+ if (get_next_command(fsg))
-+ continue;
-+
-+ spin_lock_irq(&fsg->lock);
-+ if (!exception_in_progress(fsg))
-+ fsg->state = FSG_STATE_DATA_PHASE;
-+ spin_unlock_irq(&fsg->lock);
-+
-+ if (do_scsi_command(fsg) || finish_reply(fsg))
-+ continue;
-+
-+ spin_lock_irq(&fsg->lock);
-+ if (!exception_in_progress(fsg))
-+ fsg->state = FSG_STATE_STATUS_PHASE;
-+ spin_unlock_irq(&fsg->lock);
-+
-+ if (send_status(fsg))
-+ continue;
-+
-+ spin_lock_irq(&fsg->lock);
-+ if (!exception_in_progress(fsg))
-+ fsg->state = FSG_STATE_IDLE;
-+ spin_unlock_irq(&fsg->lock);
-+ }
-+
-+ spin_lock_irq(&fsg->lock);
-+ fsg->thread_task = NULL;
-+ spin_unlock_irq(&fsg->lock);
-+
-+ /* In case we are exiting because of a signal, unregister the
-+ * gadget driver and close the backing file. */
-+ if (test_and_clear_bit(REGISTERED, &fsg->atomic_bitflags))
-+ close_all_backing_files(fsg);
-+
-+ /* Let the unbind and cleanup routines know the thread has exited */
-+ complete_and_exit(&fsg->thread_notifier, 0);
-+}
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+/* If the next two routines are called while the gadget is registered,
-+ * the caller must own fsg->filesem for writing. */
-+
-+static int open_backing_file(struct fsg_dev *fsg, struct lun *curlun,
-+ const char *filename)
-+{
-+ int ro;
-+ struct file *filp = NULL;
-+ int rc = -EINVAL;
-+ struct inode *inode = NULL;
-+ loff_t size;
-+ loff_t num_sectors;
-+
-+ /* R/W if we can, R/O if we must */
-+ ro = curlun->ro;
-+ if (!ro) {
-+ filp = filp_open(filename, O_RDWR | O_LARGEFILE, 0);
-+ if (-EROFS == PTR_ERR(filp))
-+ ro = 1;
-+ }
-+ if (ro)
-+ filp = filp_open(filename, O_RDONLY | O_LARGEFILE, 0);
-+ if (IS_ERR(filp)) {
-+ LINFO(curlun, "unable to open backing file: %s\n", filename);
-+ return PTR_ERR(filp);
-+ }
-+
-+ if (!(filp->f_mode & FMODE_WRITE))
-+ ro = 1;
-+
-+ if (filp->f_path.dentry)
-+ inode = filp->f_path.dentry->d_inode;
-+ if (inode && S_ISBLK(inode->i_mode)) {
-+ if (bdev_read_only(inode->i_bdev))
-+ ro = 1;
-+ } else if (!inode || !S_ISREG(inode->i_mode)) {
-+ LINFO(curlun, "invalid file type: %s\n", filename);
-+ goto out;
-+ }
-+
-+ /* If we can't read the file, it's no good.
-+ * If we can't write the file, use it read-only. */
-+ if (!filp->f_op || !(filp->f_op->read || filp->f_op->aio_read)) {
-+ LINFO(curlun, "file not readable: %s\n", filename);
-+ goto out;
-+ }
-+ if (!(filp->f_op->write || filp->f_op->aio_write))
-+ ro = 1;
-+
-+ size = i_size_read(inode->i_mapping->host);
-+ if (size < 0) {
-+ LINFO(curlun, "unable to find file size: %s\n", filename);
-+ rc = (int) size;
-+ goto out;
-+ }
-+ num_sectors = size >> 9; /* File size in 512-byte sectors */
-+ if (num_sectors == 0) {
-+ LINFO(curlun, "file too small: %s\n", filename);
-+ rc = -ETOOSMALL;
-+ goto out;
-+ }
-+
-+ get_file(filp);
-+ curlun->ro = ro;
-+ curlun->filp = filp;
-+ curlun->file_length = size;
-+ curlun->num_sectors = num_sectors;
-+ LDBG(curlun, "open backing file: %s size: %lld num_sectors: %lld\n",
-+ filename, size, num_sectors);
-+ rc = 0;
-+ adjust_wake_lock(fsg);
-+
-+out:
-+ filp_close(filp, current->files);
-+ return rc;
-+}
-+
-+
-+static void close_backing_file(struct fsg_dev *fsg, struct lun *curlun)
-+{
-+ if (curlun->filp) {
-+ int rc;
-+
-+ /*
-+ * XXX: San: Ugly hack here added to ensure that
-+ * our pages get synced to disk.
-+ * Also drop caches here just to be extra-safe
-+ */
-+ rc = vfs_fsync(curlun->filp, curlun->filp->f_path.dentry, 1);
-+ if (rc < 0)
-+ printk(KERN_ERR "ums: Error syncing data (%d)\n", rc);
-+ /* drop_pagecache and drop_slab are no longer available */
-+ /* drop_pagecache(); */
-+ /* drop_slab(); */
-+
-+ LDBG(curlun, "close backing file\n");
-+ fput(curlun->filp);
-+ curlun->filp = NULL;
-+ adjust_wake_lock(fsg);
-+ }
-+}
-+
-+static void close_all_backing_files(struct fsg_dev *fsg)
-+{
-+ int i;
-+
-+ for (i = 0; i < fsg->nluns; ++i)
-+ close_backing_file(fsg, &fsg->luns[i]);
-+}
-+
-+static ssize_t show_file(struct device *dev, struct device_attribute *attr,
-+ char *buf)
-+{
-+ struct lun *curlun = dev_to_lun(dev);
-+ struct fsg_dev *fsg = dev_get_drvdata(dev);
-+ char *p;
-+ ssize_t rc;
-+
-+ down_read(&fsg->filesem);
-+ if (backing_file_is_open(curlun)) { /* Get the complete pathname */
-+ p = d_path(&curlun->filp->f_path, buf, PAGE_SIZE - 1);
-+ if (IS_ERR(p))
-+ rc = PTR_ERR(p);
-+ else {
-+ rc = strlen(p);
-+ memmove(buf, p, rc);
-+ buf[rc] = '\n'; /* Add a newline */
-+ buf[++rc] = 0;
-+ }
-+ } else { /* No file, return 0 bytes */
-+ *buf = 0;
-+ rc = 0;
-+ }
-+ up_read(&fsg->filesem);
-+ return rc;
-+}
-+
-+static ssize_t store_file(struct device *dev, struct device_attribute *attr,
-+ const char *buf, size_t count)
-+{
-+ struct lun *curlun = dev_to_lun(dev);
-+ struct fsg_dev *fsg = dev_get_drvdata(dev);
-+ int rc = 0;
-+
-+ DBG(fsg, "store_file: \"%s\"\n", buf);
-+#if 0
-+ /* disabled because we need to allow closing the backing file if the media was removed */
-+ if (curlun->prevent_medium_removal && backing_file_is_open(curlun)) {
-+ LDBG(curlun, "eject attempt prevented\n");
-+ return -EBUSY; /* "Door is locked" */
-+ }
-+#endif
-+
-+ /* Remove a trailing newline */
-+ if (count > 0 && buf[count-1] == '\n')
-+ ((char *) buf)[count-1] = 0;
-+
-+ /* Eject current medium */
-+ down_write(&fsg->filesem);
-+ if (backing_file_is_open(curlun)) {
-+ close_backing_file(fsg, curlun);
-+ curlun->unit_attention_data = SS_MEDIUM_NOT_PRESENT;
-+ }
-+
-+ /* Load new medium */
-+ if (count > 0 && buf[0]) {
-+ rc = open_backing_file(fsg, curlun, buf);
-+ if (rc == 0)
-+ curlun->unit_attention_data =
-+ SS_NOT_READY_TO_READY_TRANSITION;
-+ }
-+ up_write(&fsg->filesem);
-+ return (rc < 0 ? rc : count);
-+}
-+
-+
-+static DEVICE_ATTR(file, 0444, show_file, store_file);
-+
-+/*-------------------------------------------------------------------------*/
-+
-+static void fsg_release(struct kref *ref)
-+{
-+ struct fsg_dev *fsg = container_of(ref, struct fsg_dev, ref);
-+
-+ kfree(fsg->luns);
-+ kfree(fsg);
-+}
-+
-+static void lun_release(struct device *dev)
-+{
-+ struct fsg_dev *fsg = dev_get_drvdata(dev);
-+
-+ kref_put(&fsg->ref, fsg_release);
-+}
-+
-+
-+/*-------------------------------------------------------------------------*/
-+
-+static int __init fsg_alloc(void)
-+{
-+ struct fsg_dev *fsg;
-+
-+ fsg = kzalloc(sizeof *fsg, GFP_KERNEL);
-+ if (!fsg)
-+ return -ENOMEM;
-+ spin_lock_init(&fsg->lock);
-+ init_rwsem(&fsg->filesem);
-+ kref_init(&fsg->ref);
-+ init_completion(&fsg->thread_notifier);
-+
-+ the_fsg = fsg;
-+ return 0;
-+}
-+
-+static ssize_t print_switch_name(struct switch_dev *sdev, char *buf)
-+{
-+ return sprintf(buf, "%s\n", DRIVER_NAME);
-+}
-+
-+static ssize_t print_switch_state(struct switch_dev *sdev, char *buf)
-+{
-+ struct fsg_dev *fsg = container_of(sdev, struct fsg_dev, sdev);
-+ return sprintf(buf, "%s\n", (fsg->config ? "online" : "offline"));
-+}
-+
-+static void
-+fsg_function_unbind(struct usb_configuration *c, struct usb_function *f)
-+{
-+ struct fsg_dev *fsg = func_to_dev(f);
-+ int i;
-+ struct lun *curlun;
-+
-+ DBG(fsg, "fsg_function_unbind\n");
-+ clear_bit(REGISTERED, &fsg->atomic_bitflags);
-+
-+ /* Unregister the sysfs attribute files and the LUNs */
-+ for (i = 0; i < fsg->nluns; ++i) {
-+ curlun = &fsg->luns[i];
-+ if (curlun->registered) {
-+ device_remove_file(&curlun->dev, &dev_attr_file);
-+ device_unregister(&curlun->dev);
-+ curlun->registered = 0;
-+ }
-+ }
-+
-+ /* If the thread isn't already dead, tell it to exit now */
-+ if (fsg->state != FSG_STATE_TERMINATED) {
-+ raise_exception(fsg, FSG_STATE_EXIT);
-+ wait_for_completion(&fsg->thread_notifier);
-+
-+ /* The cleanup routine waits for this completion also */
-+ complete(&fsg->thread_notifier);
-+ }
-+
-+ /* Free the data buffers */
-+ for (i = 0; i < NUM_BUFFERS; ++i)
-+ kfree(fsg->buffhds[i].buf);
-+}
-+
-+static int __init
-+fsg_function_bind(struct usb_configuration *c, struct usb_function *f)
-+{
-+ struct usb_composite_dev *cdev = c->cdev;
-+ struct fsg_dev *fsg = func_to_dev(f);
-+ int rc;
-+ int i;
-+ int id;
-+ struct lun *curlun;
-+ struct usb_ep *ep;
-+ char *pathbuf, *p;
-+
-+ fsg->cdev = cdev;
-+ DBG(fsg, "fsg_function_bind\n");
-+
-+ dev_attr_file.attr.mode = 0644;
-+
-+ /* Find out how many LUNs there should be */
-+ i = fsg->nluns;
-+ if (i == 0)
-+ i = 1;
-+ if (i > MAX_LUNS) {
-+ ERROR(fsg, "invalid number of LUNs: %d\n", i);
-+ rc = -EINVAL;
-+ goto out;
-+ }
-+
-+ /* Create the LUNs, open their backing files, and register the
-+ * LUN devices in sysfs. */
-+ fsg->luns = kzalloc(i * sizeof(struct lun), GFP_KERNEL);
-+ if (!fsg->luns) {
-+ rc = -ENOMEM;
-+ goto out;
-+ }
-+ fsg->nluns = i;
-+
-+ for (i = 0; i < fsg->nluns; ++i) {
-+ curlun = &fsg->luns[i];
-+ curlun->ro = 0;
-+ curlun->dev.release = lun_release;
-+ curlun->dev.parent = &cdev->gadget->dev;
-+ dev_set_drvdata(&curlun->dev, fsg);
-+ snprintf(curlun->dev.bus_id, BUS_ID_SIZE,
-+ "lun%d", i);
-+
-+ rc = device_register(&curlun->dev);
-+ if (rc != 0) {
-+ INFO(fsg, "failed to register LUN%d: %d\n", i, rc);
-+ goto out;
-+ }
-+ rc = device_create_file(&curlun->dev, &dev_attr_file);
-+ if (rc != 0) {
-+ ERROR(fsg, "device_create_file failed: %d\n", rc);
-+ device_unregister(&curlun->dev);
-+ goto out;
-+ }
-+ curlun->registered = 1;
-+ kref_get(&fsg->ref);
-+ }
-+
-+ /* allocate interface ID(s) */
-+ id = usb_interface_id(c, f);
-+ if (id < 0)
-+ return id;
-+ intf_desc.bInterfaceNumber = id;
-+
-+ ep = usb_ep_autoconfig(cdev->gadget, &fs_bulk_in_desc);
-+ if (!ep)
-+ goto autoconf_fail;
-+ ep->driver_data = fsg; /* claim the endpoint */
-+ fsg->bulk_in = ep;
-+
-+ ep = usb_ep_autoconfig(cdev->gadget, &fs_bulk_out_desc);
-+ if (!ep)
-+ goto autoconf_fail;
-+ ep->driver_data = fsg; /* claim the endpoint */
-+ fsg->bulk_out = ep;
-+
-+ rc = -ENOMEM;
-+
-+ if (gadget_is_dualspeed(cdev->gadget)) {
-+ /* Assume endpoint addresses are the same for both speeds */
-+ hs_bulk_in_desc.bEndpointAddress =
-+ fs_bulk_in_desc.bEndpointAddress;
-+ hs_bulk_out_desc.bEndpointAddress =
-+ fs_bulk_out_desc.bEndpointAddress;
-+
-+ f->hs_descriptors = hs_function;
-+ }
-+
-+ /* Allocate the data buffers */
-+ for (i = 0; i < NUM_BUFFERS; ++i) {
-+ struct fsg_buffhd *bh = &fsg->buffhds[i];
-+
-+ /* Allocate for the bulk-in endpoint. We assume that
-+ * the buffer will also work with the bulk-out (and
-+ * interrupt-in) endpoint. */
-+ bh->buf = kmalloc(fsg->buf_size, GFP_KERNEL);
-+ if (!bh->buf)
-+ goto out;
-+ bh->next = bh + 1;
-+ }
-+ fsg->buffhds[NUM_BUFFERS - 1].next = &fsg->buffhds[0];
-+
-+ fsg->thread_task = kthread_create(fsg_main_thread, fsg,
-+ shortname);
-+ if (IS_ERR(fsg->thread_task)) {
-+ rc = PTR_ERR(fsg->thread_task);
-+ ERROR(fsg, "kthread_create failed: %d\n", rc);
-+ goto out;
-+ }
-+
-+ INFO(fsg, "Number of LUNs=%d\n", fsg->nluns);
-+
-+ pathbuf = kmalloc(PATH_MAX, GFP_KERNEL);
-+ for (i = 0; i < fsg->nluns; ++i) {
-+ curlun = &fsg->luns[i];
-+ if (backing_file_is_open(curlun)) {
-+ p = NULL;
-+ if (pathbuf) {
-+ p = d_path(&curlun->filp->f_path,
-+ pathbuf, PATH_MAX);
-+ if (IS_ERR(p))
-+ p = NULL;
-+ }
-+ LINFO(curlun, "ro=%d, file: %s\n",
-+ curlun->ro, (p ? p : "(error)"));
-+ }
-+ }
-+ kfree(pathbuf);
-+
-+ set_bit(REGISTERED, &fsg->atomic_bitflags);
-+
-+ /* Tell the thread to start working */
-+ wake_up_process(fsg->thread_task);
-+ return 0;
-+
-+autoconf_fail:
-+ ERROR(fsg, "unable to autoconfigure all endpoints\n");
-+ rc = -ENOTSUPP;
-+
-+out:
-+ DBG(fsg, "fsg_function_bind failed: %d\n", rc);
-+ fsg->state = FSG_STATE_TERMINATED; /* The thread is dead */
-+ fsg_function_unbind(c, f);
-+ close_all_backing_files(fsg);
-+ return rc;
-+}
-+
-+static int fsg_function_set_alt(struct usb_function *f,
-+ unsigned intf, unsigned alt)
-+{
-+ struct fsg_dev *fsg = func_to_dev(f);
-+ DBG(fsg, "fsg_function_set_alt intf: %d alt: %d\n", intf, alt);
-+ fsg->new_config = 1;
-+ raise_exception(fsg, FSG_STATE_CONFIG_CHANGE);
-+ return 0;
-+}
-+
-+static void fsg_function_disable(struct usb_function *f)
-+{
-+ struct fsg_dev *fsg = func_to_dev(f);
-+ DBG(fsg, "fsg_function_disable\n");
-+ fsg->new_config = 0;
-+ raise_exception(fsg, FSG_STATE_CONFIG_CHANGE);
-+}
-+
-+int __init mass_storage_function_add(struct usb_composite_dev *cdev,
-+ struct usb_configuration *c, int nluns)
-+{
-+ int rc;
-+ struct fsg_dev *fsg;
-+
-+ printk(KERN_INFO "mass_storage_function_add\n");
-+ rc = fsg_alloc();
-+ if (rc)
-+ return rc;
-+ fsg = the_fsg;
-+ fsg->nluns = nluns;
-+
-+ spin_lock_init(&fsg->lock);
-+ init_rwsem(&fsg->filesem);
-+ kref_init(&fsg->ref);
-+ init_completion(&fsg->thread_notifier);
-+
-+ the_fsg->buf_size = BULK_BUFFER_SIZE;
-+ the_fsg->sdev.name = DRIVER_NAME;
-+ the_fsg->sdev.print_name = print_switch_name;
-+ the_fsg->sdev.print_state = print_switch_state;
-+ rc = switch_dev_register(&the_fsg->sdev);
-+ if (rc < 0)
-+ goto err_switch_dev_register;
-+
-+ wake_lock_init(&the_fsg->wake_lock, WAKE_LOCK_SUSPEND,
-+ "usb_mass_storage");
-+
-+ fsg->cdev = cdev;
-+ fsg->function.name = shortname;
-+ fsg->function.descriptors = fs_function;
-+ fsg->function.bind = fsg_function_bind;
-+ fsg->function.unbind = fsg_function_unbind;
-+ fsg->function.setup = fsg_function_setup;
-+ fsg->function.set_alt = fsg_function_set_alt;
-+ fsg->function.disable = fsg_function_disable;
-+
-+ rc = usb_add_function(c, &fsg->function);
-+ if (rc != 0)
-+ goto err_usb_add_function;
-+
-+ return 0;
-+
-+err_usb_add_function:
-+ switch_dev_unregister(&the_fsg->sdev);
-+err_switch_dev_register:
-+ kref_put(&the_fsg->ref, fsg_release);
-+
-+ return rc;
-+}
---- /dev/null
-+++ b/drivers/usb/gadget/f_mass_storage.h
-@@ -0,0 +1,52 @@
-+/*
-+ * drivers/usb/gadget/f_mass_storage.h
-+ *
-+ * Function Driver for USB Mass Storage
-+ *
-+ * Copyright (C) 2008 Google, Inc.
-+ * Author: Mike Lockwood <lockwood@android.com>
-+ *
-+ * Based heavily on the file_storage gadget driver in
-+ * drivers/usb/gadget/file_storage.c and licensed under the same terms:
-+ *
-+ * Copyright (C) 2003-2007 Alan Stern
-+ * All rights reserved.
-+ *
-+ * Redistribution and use in source and binary forms, with or without
-+ * modification, are permitted provided that the following conditions
-+ * are met:
-+ * 1. Redistributions of source code must retain the above copyright
-+ * notice, this list of conditions, and the following disclaimer,
-+ * without modification.
-+ * 2. Redistributions in binary form must reproduce the above copyright
-+ * notice, this list of conditions and the following disclaimer in the
-+ * documentation and/or other materials provided with the distribution.
-+ * 3. The names of the above-listed copyright holders may not be used
-+ * to endorse or promote products derived from this software without
-+ * specific prior written permission.
-+ *
-+ * ALTERNATIVELY, this software may be distributed under the terms of the
-+ * GNU General Public License ("GPL") as published by the Free Software
-+ * Foundation, either version 2 of that License or (at your option) any
-+ * later version.
-+ *
-+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
-+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-+ */
-+
-+#ifndef __F_MASS_STORAGE_H
-+#define __F_MASS_STORAGE_H
-+
-+int mass_storage_function_add(struct usb_composite_dev *cdev,
-+ struct usb_configuration *c, int nluns);
-+
-+#endif /* __F_MASS_STORAGE_H */
---- /dev/null
-+++ b/include/linux/usb/android.h
-@@ -0,0 +1,40 @@
-+/*
-+ * Platform data for Android USB
-+ *
-+ * Copyright (C) 2008 Google, Inc.
-+ * Author: Mike Lockwood <lockwood@android.com>
-+ *
-+ * This software is licensed under the terms of the GNU General Public
-+ * License version 2, as published by the Free Software Foundation, and
-+ * may be copied, distributed, and modified under those terms.
-+ *
-+ * 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.
-+ *
-+ */
-+#ifndef __LINUX_USB_ANDROID_H
-+#define __LINUX_USB_ANDROID_H
-+
-+struct android_usb_platform_data {
-+ /* USB device descriptor fields */
-+ __u16 vendor_id;
-+
-+ /* Default product ID. */
-+ __u16 product_id;
-+
-+ /* Product ID when adb is enabled. */
-+ __u16 adb_product_id;
-+
-+ __u16 version;
-+
-+ char *product_name;
-+ char *manufacturer_name;
-+ char *serial_number;
-+
-+ /* number of LUNS for mass storage function */
-+ int nluns;
-+};
-+
-+#endif /* __LINUX_USB_ANDROID_H */
projects / openwrt / svn-archive / archive.git / blobdiff