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, 4127 insertions, 0 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 new file mode 100644 index 000000000..4638449ce --- /dev/null +++ b/target/linux/goldfish/patches-2.6.30/0101-android_usb-Composite-USB-gadget-driver-for-android.patch @@ -0,0 +1,4127 @@ +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 */ |