mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-25 22:27:45 +02:00
2d581e6047
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16459 3c298f89-4303-0410-b956-a3cf2f4a3e73
4128 lines
109 KiB
Diff
4128 lines
109 KiB
Diff
From 03e39e8f663c896dac11e87d96e8cb0292520e36 Mon Sep 17 00:00:00 2001
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From: Mike Lockwood <lockwood@android.com>
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Date: Tue, 2 Dec 2008 22:01:33 -0500
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Subject: [PATCH 101/134] android_usb: Composite USB gadget driver for android.
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Signed-off-by: Mike Lockwood <lockwood@android.com>
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USB: android gadget: add remote wakeup attribute to android function
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Add remote wakeup attribute to configuration descriptor of android
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function to advertise remote wakeup capability to host
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Acked-by: Allam, Suresh Reddy <sallam@qualcomm.com>
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Signed-off-by: Mike Lockwood <lockwood@android.com>
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usb gadget: link fixes for android composite gadget
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Signed-off-by: Mike Lockwood <lockwood@android.com>
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usb gadget: Fix null pointer errors in android composite driver
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Signed-off-by: Mike Lockwood <lockwood@android.com>
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---
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drivers/usb/gadget/Kconfig | 8 +
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drivers/usb/gadget/Makefile | 2 +
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drivers/usb/gadget/android.c | 345 +++++
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drivers/usb/gadget/f_adb.c | 668 ++++++++
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drivers/usb/gadget/f_adb.h | 25 +
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drivers/usb/gadget/f_mass_storage.c | 2906 +++++++++++++++++++++++++++++++++++
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drivers/usb/gadget/f_mass_storage.h | 52 +
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include/linux/usb/android.h | 40 +
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8 files changed, 4046 insertions(+), 0 deletions(-)
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create mode 100644 drivers/usb/gadget/android.c
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create mode 100644 drivers/usb/gadget/f_adb.c
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create mode 100644 drivers/usb/gadget/f_adb.h
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create mode 100644 drivers/usb/gadget/f_mass_storage.c
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create mode 100644 drivers/usb/gadget/f_mass_storage.h
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create mode 100644 include/linux/usb/android.h
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--- a/drivers/usb/gadget/Kconfig
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+++ b/drivers/usb/gadget/Kconfig
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@@ -700,6 +700,14 @@ config USB_G_PRINTER
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For more information, see Documentation/usb/gadget_printer.txt
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which includes sample code for accessing the device file.
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+config USB_ANDROID
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+ tristate "Android Gadget"
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+ help
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+ The Android gadget provides mass storage and adb transport.
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+
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+ Say "y" to link the driver statically, or "m" to build a
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+ dynamically linked module called "g_android".
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+
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config USB_CDC_COMPOSITE
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tristate "CDC Composite Device (Ethernet and ACM)"
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depends on NET
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--- a/drivers/usb/gadget/Makefile
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+++ b/drivers/usb/gadget/Makefile
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@@ -33,6 +33,7 @@ gadgetfs-objs := inode.o
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g_file_storage-objs := file_storage.o
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g_printer-objs := printer.o
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g_cdc-objs := cdc2.o
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+g_android-objs := android.o f_adb.o f_mass_storage.o
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obj-$(CONFIG_USB_ZERO) += g_zero.o
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obj-$(CONFIG_USB_ETH) += g_ether.o
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@@ -42,4 +43,5 @@ obj-$(CONFIG_USB_G_SERIAL) += g_serial.o
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obj-$(CONFIG_USB_G_PRINTER) += g_printer.o
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obj-$(CONFIG_USB_MIDI_GADGET) += g_midi.o
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obj-$(CONFIG_USB_CDC_COMPOSITE) += g_cdc.o
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+obj-$(CONFIG_USB_ANDROID) += g_android.o
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--- /dev/null
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+++ b/drivers/usb/gadget/android.c
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@@ -0,0 +1,345 @@
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+/*
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+ * Gadget Driver for Android
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+ *
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+ * Copyright (C) 2008 Google, Inc.
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+ * Author: Mike Lockwood <lockwood@android.com>
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+ *
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+ * This software is licensed under the terms of the GNU General Public
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+ * License version 2, as published by the Free Software Foundation, and
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+ * may be copied, distributed, and modified under those terms.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ */
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+
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+/* #define DEBUG */
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+/* #define VERBOSE_DEBUG */
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+
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+#include <linux/init.h>
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+#include <linux/module.h>
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+#include <linux/fs.h>
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+
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+#include <linux/delay.h>
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+#include <linux/kernel.h>
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+#include <linux/utsname.h>
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+#include <linux/miscdevice.h>
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+#include <linux/platform_device.h>
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+
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+#include <linux/usb/android.h>
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+#include <linux/usb/ch9.h>
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+#include <linux/usb/composite.h>
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+#include <linux/usb/gadget.h>
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+
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+#include "f_mass_storage.h"
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+#include "f_adb.h"
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+
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+#include "gadget_chips.h"
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+
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+/*
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+ * Kbuild is not very cooperative with respect to linking separately
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+ * compiled library objects into one module. So for now we won't use
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+ * separate compilation ... ensuring init/exit sections work to shrink
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+ * the runtime footprint, and giving us at least some parts of what
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+ * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
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+ */
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+#include "usbstring.c"
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+#include "config.c"
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+#include "epautoconf.c"
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+#include "composite.c"
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+
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+MODULE_AUTHOR("Mike Lockwood");
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+MODULE_DESCRIPTION("Android Composite USB Driver");
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+MODULE_LICENSE("GPL");
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+MODULE_VERSION("1.0");
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+
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+static const char longname[] = "Gadget Android";
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+
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+/* Default vendor and product IDs, overridden by platform data */
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+#define VENDOR_ID 0x18D1
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+#define PRODUCT_ID 0x0001
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+#define ADB_PRODUCT_ID 0x0002
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+
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+struct android_dev {
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+ struct usb_gadget *gadget;
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+ struct usb_composite_dev *cdev;
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+
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+ int product_id;
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+ int adb_product_id;
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+ int version;
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+
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+ int adb_enabled;
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+ int nluns;
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+};
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+
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+static atomic_t adb_enable_excl;
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+static struct android_dev *_android_dev;
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+
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+/* string IDs are assigned dynamically */
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+
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+#define STRING_MANUFACTURER_IDX 0
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+#define STRING_PRODUCT_IDX 1
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+#define STRING_SERIAL_IDX 2
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+
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+/* String Table */
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+static struct usb_string strings_dev[] = {
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+ /* These dummy values should be overridden by platform data */
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+ [STRING_MANUFACTURER_IDX].s = "Android",
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+ [STRING_PRODUCT_IDX].s = "Android",
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+ [STRING_SERIAL_IDX].s = "0123456789ABCDEF",
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+ { } /* end of list */
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+};
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+
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+static struct usb_gadget_strings stringtab_dev = {
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+ .language = 0x0409, /* en-us */
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+ .strings = strings_dev,
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+};
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+
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+static struct usb_gadget_strings *dev_strings[] = {
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+ &stringtab_dev,
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+ NULL,
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+};
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+
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+static struct usb_device_descriptor device_desc = {
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+ .bLength = sizeof(device_desc),
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+ .bDescriptorType = USB_DT_DEVICE,
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+ .bcdUSB = __constant_cpu_to_le16(0x0200),
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+ .bDeviceClass = USB_CLASS_PER_INTERFACE,
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+ .idVendor = __constant_cpu_to_le16(VENDOR_ID),
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+ .idProduct = __constant_cpu_to_le16(PRODUCT_ID),
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+ .bcdDevice = __constant_cpu_to_le16(0xffff),
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+ .bNumConfigurations = 1,
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+};
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+
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+static int __init android_bind_config(struct usb_configuration *c)
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+{
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+ struct android_dev *dev = _android_dev;
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+ int ret;
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+ printk(KERN_DEBUG "android_bind_config\n");
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+
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+ ret = mass_storage_function_add(dev->cdev, c, dev->nluns);
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+ if (ret)
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+ return ret;
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+ return adb_function_add(dev->cdev, c);
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+}
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+
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+static struct usb_configuration android_config_driver = {
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+ .label = "android",
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+ .bind = android_bind_config,
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+ .bConfigurationValue = 1,
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+ .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
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+ .bMaxPower = 0x80, /* 250ma */
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+};
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+
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+static int __init android_bind(struct usb_composite_dev *cdev)
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+{
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+ struct android_dev *dev = _android_dev;
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+ struct usb_gadget *gadget = cdev->gadget;
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+ int gcnum;
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+ int id;
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+ int ret;
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+
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+ printk(KERN_INFO "android_bind\n");
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+
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+ /* Allocate string descriptor numbers ... note that string
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+ * contents can be overridden by the composite_dev glue.
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+ */
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+ id = usb_string_id(cdev);
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+ if (id < 0)
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+ return id;
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+ strings_dev[STRING_MANUFACTURER_IDX].id = id;
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+ device_desc.iManufacturer = id;
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+
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+ id = usb_string_id(cdev);
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+ if (id < 0)
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+ return id;
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+ strings_dev[STRING_PRODUCT_IDX].id = id;
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+ device_desc.iProduct = id;
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+
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+ id = usb_string_id(cdev);
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+ if (id < 0)
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+ return id;
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+ strings_dev[STRING_SERIAL_IDX].id = id;
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+ device_desc.iSerialNumber = id;
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+
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+ if (gadget->ops->wakeup)
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+ android_config_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
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+
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+ /* register our configuration */
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+ ret = usb_add_config(cdev, &android_config_driver);
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+ if (ret) {
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+ printk(KERN_ERR "usb_add_config failed\n");
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+ return ret;
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+ }
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+
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+ gcnum = usb_gadget_controller_number(gadget);
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+ if (gcnum >= 0)
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+ device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum);
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+ else {
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+ /* gadget zero is so simple (for now, no altsettings) that
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+ * it SHOULD NOT have problems with bulk-capable hardware.
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+ * so just warn about unrcognized controllers -- don't panic.
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+ *
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+ * things like configuration and altsetting numbering
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+ * can need hardware-specific attention though.
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+ */
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+ pr_warning("%s: controller '%s' not recognized\n",
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+ longname, gadget->name);
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+ device_desc.bcdDevice = __constant_cpu_to_le16(0x9999);
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+ }
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+
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+ usb_gadget_set_selfpowered(gadget);
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+ dev->cdev = cdev;
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+
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+ return 0;
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+}
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+
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+static struct usb_composite_driver android_usb_driver = {
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+ .name = "android_usb",
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+ .dev = &device_desc,
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+ .strings = dev_strings,
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+ .bind = android_bind,
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+};
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+
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+static void enable_adb(struct android_dev *dev, int enable)
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+{
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+ if (enable != dev->adb_enabled) {
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+ dev->adb_enabled = enable;
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+ adb_function_enable(enable);
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+
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+ /* set product ID to the appropriate value */
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+ if (enable)
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+ device_desc.idProduct =
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+ __constant_cpu_to_le16(dev->adb_product_id);
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+ else
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+ device_desc.idProduct =
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+ __constant_cpu_to_le16(dev->product_id);
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+ if (dev->cdev)
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+ dev->cdev->desc.idProduct = device_desc.idProduct;
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+
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+ /* force reenumeration */
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+ if (dev->cdev && dev->cdev->gadget &&
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+ dev->cdev->gadget->speed != USB_SPEED_UNKNOWN) {
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+ usb_gadget_disconnect(dev->cdev->gadget);
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+ msleep(10);
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+ usb_gadget_connect(dev->cdev->gadget);
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+ }
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+ }
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+}
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+
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+static int adb_enable_open(struct inode *ip, struct file *fp)
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+{
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+ if (atomic_inc_return(&adb_enable_excl) != 1) {
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+ atomic_dec(&adb_enable_excl);
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+ return -EBUSY;
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+ }
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+
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+ printk(KERN_INFO "enabling adb\n");
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+ enable_adb(_android_dev, 1);
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+
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+ return 0;
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+}
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+
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+static int adb_enable_release(struct inode *ip, struct file *fp)
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+{
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+ printk(KERN_INFO "disabling adb\n");
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+ enable_adb(_android_dev, 0);
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+ atomic_dec(&adb_enable_excl);
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+ return 0;
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+}
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+
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+static struct file_operations adb_enable_fops = {
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+ .owner = THIS_MODULE,
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+ .open = adb_enable_open,
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+ .release = adb_enable_release,
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+};
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+
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+static struct miscdevice adb_enable_device = {
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+ .minor = MISC_DYNAMIC_MINOR,
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+ .name = "android_adb_enable",
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+ .fops = &adb_enable_fops,
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+};
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+
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+static int __init android_probe(struct platform_device *pdev)
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+{
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+ struct android_usb_platform_data *pdata = pdev->dev.platform_data;
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+ struct android_dev *dev = _android_dev;
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+
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+ printk(KERN_INFO "android_probe pdata: %p\n", pdata);
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+
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+ if (pdata) {
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+ if (pdata->vendor_id)
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+ device_desc.idVendor =
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+ __constant_cpu_to_le16(pdata->vendor_id);
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+ if (pdata->product_id) {
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+ dev->product_id = pdata->product_id;
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+ device_desc.idProduct =
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+ __constant_cpu_to_le16(pdata->product_id);
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+ }
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+ if (pdata->adb_product_id)
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+ dev->adb_product_id = pdata->adb_product_id;
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+ if (pdata->version)
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+ dev->version = pdata->version;
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+
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+ if (pdata->product_name)
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+ strings_dev[STRING_PRODUCT_IDX].s = pdata->product_name;
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+ if (pdata->manufacturer_name)
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+ strings_dev[STRING_MANUFACTURER_IDX].s =
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+ pdata->manufacturer_name;
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+ if (pdata->serial_number)
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+ strings_dev[STRING_SERIAL_IDX].s = pdata->serial_number;
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+ dev->nluns = pdata->nluns;
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+ }
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+
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+ return 0;
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+}
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+
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+static struct platform_driver android_platform_driver = {
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+ .driver = { .name = "android_usb", },
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+ .probe = android_probe,
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+};
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+
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+static int __init init(void)
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+{
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+ struct android_dev *dev;
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+ int ret;
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+
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+ printk(KERN_INFO "android init\n");
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+
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+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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+ if (!dev)
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+ return -ENOMEM;
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+
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+ /* set default values, which should be overridden by platform data */
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+ dev->product_id = PRODUCT_ID;
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+ dev->adb_product_id = ADB_PRODUCT_ID;
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+ _android_dev = dev;
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+
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+ ret = platform_driver_register(&android_platform_driver);
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+ if (ret)
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+ return ret;
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+ ret = misc_register(&adb_enable_device);
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+ if (ret) {
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+ platform_driver_unregister(&android_platform_driver);
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+ return ret;
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+ }
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+ ret = usb_composite_register(&android_usb_driver);
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+ if (ret) {
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+ misc_deregister(&adb_enable_device);
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+ platform_driver_unregister(&android_platform_driver);
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+ }
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+ return ret;
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+}
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+module_init(init);
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+
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+static void __exit cleanup(void)
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+{
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+ usb_composite_unregister(&android_usb_driver);
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+ misc_deregister(&adb_enable_device);
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+ platform_driver_unregister(&android_platform_driver);
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+ kfree(_android_dev);
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+ _android_dev = NULL;
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+}
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+module_exit(cleanup);
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--- /dev/null
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+++ b/drivers/usb/gadget/f_adb.c
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@@ -0,0 +1,668 @@
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+/*
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+ * Gadget Driver for Android ADB
|
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+ *
|
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+ * Copyright (C) 2008 Google, Inc.
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+ * Author: Mike Lockwood <lockwood@android.com>
|
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+ *
|
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+ * This software is licensed under the terms of the GNU General Public
|
|
+ * License version 2, as published by the Free Software Foundation, and
|
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+ * may be copied, distributed, and modified under those terms.
|
|
+ *
|
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+ * 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
|
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+ * GNU General Public License for more details.
|
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+ *
|
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+ */
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+
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+/* #define DEBUG */
|
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+/* #define VERBOSE_DEBUG */
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+
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+#include <linux/module.h>
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+#include <linux/init.h>
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+#include <linux/poll.h>
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+#include <linux/delay.h>
|
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+#include <linux/wait.h>
|
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+#include <linux/err.h>
|
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+#include <linux/interrupt.h>
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+
|
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+#include <linux/types.h>
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+#include <linux/device.h>
|
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+#include <linux/miscdevice.h>
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+
|
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+#include <linux/usb/ch9.h>
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+#include <linux/usb/composite.h>
|
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+#include <linux/usb/gadget.h>
|
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+
|
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+#include "f_adb.h"
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+
|
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+#define BULK_BUFFER_SIZE 4096
|
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+
|
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+/* 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 */
|