diff options
Diffstat (limited to 'target/linux/goldfish/patches-2.6.30/0101-android_usb-Composite-USB-gadget-driver-for-android.patch')
| -rw-r--r-- | target/linux/goldfish/patches-2.6.30/0101-android_usb-Composite-USB-gadget-driver-for-android.patch | 4127 |
1 files changed, 0 insertions, 4127 deletions
diff --git a/target/linux/goldfish/patches-2.6.30/0101-android_usb-Composite-USB-gadget-driver-for-android.patch b/target/linux/goldfish/patches-2.6.30/0101-android_usb-Composite-USB-gadget-driver-for-android.patch deleted file mode 100644 index 4638449ce1..0000000000 --- a/target/linux/goldfish/patches-2.6.30/0101-android_usb-Composite-USB-gadget-driver-for-android.patch +++ /dev/null @@ -1,4127 +0,0 @@ -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 */ |