android_usb: Composite USB gadget driver for android.
Change-Id: I4101540916b73a5f4e48684727ff782f98b969c7
Signed-off-by: Mike Lockwood <lockwood@android.com>
USB: android gadget: add remote wakeup attribute to android function
Add remote wakeup attribute to configuration descriptor of android
function to advertise remote wakeup capability to host
Acked-by: Allam, Suresh Reddy <sallam@qualcomm.com>
Signed-off-by: Mike Lockwood <lockwood@android.com>
usb gadget: link fixes for android composite gadget
Signed-off-by: Mike Lockwood <lockwood@android.com>
usb gadget: Fix null pointer errors in android composite driver
Signed-off-by: Mike Lockwood <lockwood@android.com>
usb: gadget: android: Allow usb charging to draw up to 500mA instead of 250.
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
usb gadget: android: Add helper function for usb_gadget_connect and disconnect.
Signed-off-by: Mike Lockwood <lockwood@android.com>
drivers: usb: gadget: call switch_dev_unregister in mass storage unbind callback
This fixes a problem unloading the android gadget driver when built as a module
Signed-off-by: Mike Lockwood <lockwood@android.com>
usb: gadget: android: Add dependency on switch driver.
Signed-off-by: Mike Lockwood <lockwood@android.com>
USB: gadget: android: Fix USB WHQL Certification Issues
Submitted on behalf of RaviKumar Vembu <ravi.v@motorola.com>
Signed-off-by: Jared Suttles <jared.suttles@motorola.com>
Signed-off-by: Mike Lockwood <lockwood@android.com>
drivers: usb: gadget: Add "usb_mass_storage" platform driver.
This will be used for configuring vendor, product and release from board file.
Submitted on behalf of RaviKumar Vembu <ravi.v@motorola.com>
Signed-off-by: Jared Suttles <jared.suttles@motorola.com>
Signed-off-by: Mike Lockwood <lockwood@android.com>
drivers: usb: gadget: Use usb_mass_storage platform device as parent for lun
If a platform device is specified for the f_mass_storage function, use it as the
parent driver for the lun files in sysfs.
This allows a platform independent file path for controlling USB mass storage
from user space.
Signed-off-by: Mike Lockwood <lockwood@android.com>
drivers: usb: gadget: Add platform data struct for usb_mass_storage device
Signed-off-by: Mike Lockwood <lockwood@android.com>
usb: gadget: mass_storage: Fix Mass Storage Panic during PC reboot
Submitted on behalf of RaviKumar Vembu <ravi.v@motorola.com>
Signed-off-by: Jared Suttles <jared.suttles@motorola.com>
Signed-off-by: Mike Lockwood <lockwood@android.com>
usb: gadget: f_mass_storage: Handle setup request correctly
Signed-off-by: Mike Lockwood <lockwood@android.com>
usb: gadget: f_mass_storage: Clean up wakelocks on error paths
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/drivers/usb/gadget/android.c b/drivers/usb/gadget/android.c
new file mode 100644
index 0000000..d3c028d
--- /dev/null
+++ b/drivers/usb/gadget/android.c
@@ -0,0 +1,351 @@
+/*
+ * Gadget Driver for Android
+ *
+ * Copyright (C) 2008 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+/* #define DEBUG */
+/* #define VERBOSE_DEBUG */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/utsname.h>
+#include <linux/miscdevice.h>
+#include <linux/platform_device.h>
+
+#include <linux/usb/android.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/composite.h>
+#include <linux/usb/gadget.h>
+
+#include "f_mass_storage.h"
+#include "f_adb.h"
+
+#include "gadget_chips.h"
+
+/*
+ * Kbuild is not very cooperative with respect to linking separately
+ * compiled library objects into one module. So for now we won't use
+ * separate compilation ... ensuring init/exit sections work to shrink
+ * the runtime footprint, and giving us at least some parts of what
+ * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
+ */
+#include "usbstring.c"
+#include "config.c"
+#include "epautoconf.c"
+#include "composite.c"
+
+MODULE_AUTHOR("Mike Lockwood");
+MODULE_DESCRIPTION("Android Composite USB Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1.0");
+
+static const char longname[] = "Gadget Android";
+
+/* Default vendor and product IDs, overridden by platform data */
+#define VENDOR_ID 0x18D1
+#define PRODUCT_ID 0x0001
+#define ADB_PRODUCT_ID 0x0002
+
+struct android_dev {
+ struct usb_composite_dev *cdev;
+
+ int product_id;
+ int adb_product_id;
+ int version;
+
+ int adb_enabled;
+ int nluns;
+};
+
+static atomic_t adb_enable_excl;
+static struct android_dev *_android_dev;
+
+/* string IDs are assigned dynamically */
+
+#define STRING_MANUFACTURER_IDX 0
+#define STRING_PRODUCT_IDX 1
+#define STRING_SERIAL_IDX 2
+
+/* String Table */
+static struct usb_string strings_dev[] = {
+ /* These dummy values should be overridden by platform data */
+ [STRING_MANUFACTURER_IDX].s = "Android",
+ [STRING_PRODUCT_IDX].s = "Android",
+ [STRING_SERIAL_IDX].s = "0123456789ABCDEF",
+ { } /* end of list */
+};
+
+static struct usb_gadget_strings stringtab_dev = {
+ .language = 0x0409, /* en-us */
+ .strings = strings_dev,
+};
+
+static struct usb_gadget_strings *dev_strings[] = {
+ &stringtab_dev,
+ NULL,
+};
+
+static struct usb_device_descriptor device_desc = {
+ .bLength = sizeof(device_desc),
+ .bDescriptorType = USB_DT_DEVICE,
+ .bcdUSB = __constant_cpu_to_le16(0x0200),
+ .bDeviceClass = USB_CLASS_PER_INTERFACE,
+ .idVendor = __constant_cpu_to_le16(VENDOR_ID),
+ .idProduct = __constant_cpu_to_le16(PRODUCT_ID),
+ .bcdDevice = __constant_cpu_to_le16(0xffff),
+ .bNumConfigurations = 1,
+};
+
+void android_usb_set_connected(int connected)
+{
+ if (_android_dev && _android_dev->cdev && _android_dev->cdev->gadget) {
+ if (connected)
+ usb_gadget_connect(_android_dev->cdev->gadget);
+ else
+ usb_gadget_disconnect(_android_dev->cdev->gadget);
+ }
+}
+
+static int __init android_bind_config(struct usb_configuration *c)
+{
+ struct android_dev *dev = _android_dev;
+ int ret;
+ printk(KERN_DEBUG "android_bind_config\n");
+
+ ret = mass_storage_function_add(dev->cdev, c, dev->nluns);
+ if (ret)
+ return ret;
+ return adb_function_add(dev->cdev, c);
+}
+
+static struct usb_configuration android_config_driver = {
+ .label = "android",
+ .bind = android_bind_config,
+ .bConfigurationValue = 1,
+ .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
+ .bMaxPower = 0xFA, /* 500ma */
+};
+
+static int __init android_bind(struct usb_composite_dev *cdev)
+{
+ struct android_dev *dev = _android_dev;
+ struct usb_gadget *gadget = cdev->gadget;
+ int gcnum;
+ int id;
+ int ret;
+
+ printk(KERN_INFO "android_bind\n");
+
+ /* Allocate string descriptor numbers ... note that string
+ * contents can be overridden by the composite_dev glue.
+ */
+ id = usb_string_id(cdev);
+ if (id < 0)
+ return id;
+ strings_dev[STRING_MANUFACTURER_IDX].id = id;
+ device_desc.iManufacturer = id;
+
+ id = usb_string_id(cdev);
+ if (id < 0)
+ return id;
+ strings_dev[STRING_PRODUCT_IDX].id = id;
+ device_desc.iProduct = id;
+
+ id = usb_string_id(cdev);
+ if (id < 0)
+ return id;
+ strings_dev[STRING_SERIAL_IDX].id = id;
+ device_desc.iSerialNumber = id;
+
+ /* register our configuration */
+ ret = usb_add_config(cdev, &android_config_driver);
+ if (ret) {
+ printk(KERN_ERR "usb_add_config failed\n");
+ return ret;
+ }
+
+ gcnum = usb_gadget_controller_number(gadget);
+ if (gcnum >= 0)
+ device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum);
+ else {
+ /* gadget zero is so simple (for now, no altsettings) that
+ * it SHOULD NOT have problems with bulk-capable hardware.
+ * so just warn about unrcognized controllers -- don't panic.
+ *
+ * things like configuration and altsetting numbering
+ * can need hardware-specific attention though.
+ */
+ pr_warning("%s: controller '%s' not recognized\n",
+ longname, gadget->name);
+ device_desc.bcdDevice = __constant_cpu_to_le16(0x9999);
+ }
+
+ usb_gadget_set_selfpowered(gadget);
+ dev->cdev = cdev;
+
+ return 0;
+}
+
+static struct usb_composite_driver android_usb_driver = {
+ .name = "android_usb",
+ .dev = &device_desc,
+ .strings = dev_strings,
+ .bind = android_bind,
+};
+
+static void enable_adb(struct android_dev *dev, int enable)
+{
+ if (enable != dev->adb_enabled) {
+ dev->adb_enabled = enable;
+ adb_function_enable(enable);
+
+ /* set product ID to the appropriate value */
+ if (enable)
+ device_desc.idProduct =
+ __constant_cpu_to_le16(dev->adb_product_id);
+ else
+ device_desc.idProduct =
+ __constant_cpu_to_le16(dev->product_id);
+ if (dev->cdev)
+ dev->cdev->desc.idProduct = device_desc.idProduct;
+
+ /* force reenumeration */
+ if (dev->cdev && dev->cdev->gadget &&
+ dev->cdev->gadget->speed != USB_SPEED_UNKNOWN) {
+ usb_gadget_disconnect(dev->cdev->gadget);
+ msleep(10);
+ usb_gadget_connect(dev->cdev->gadget);
+ }
+ }
+}
+
+static int adb_enable_open(struct inode *ip, struct file *fp)
+{
+ if (atomic_inc_return(&adb_enable_excl) != 1) {
+ atomic_dec(&adb_enable_excl);
+ return -EBUSY;
+ }
+
+ printk(KERN_INFO "enabling adb\n");
+ enable_adb(_android_dev, 1);
+
+ return 0;
+}
+
+static int adb_enable_release(struct inode *ip, struct file *fp)
+{
+ printk(KERN_INFO "disabling adb\n");
+ enable_adb(_android_dev, 0);
+ atomic_dec(&adb_enable_excl);
+ return 0;
+}
+
+static const struct file_operations adb_enable_fops = {
+ .owner = THIS_MODULE,
+ .open = adb_enable_open,
+ .release = adb_enable_release,
+};
+
+static struct miscdevice adb_enable_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "android_adb_enable",
+ .fops = &adb_enable_fops,
+};
+
+static int __init android_probe(struct platform_device *pdev)
+{
+ struct android_usb_platform_data *pdata = pdev->dev.platform_data;
+ struct android_dev *dev = _android_dev;
+
+ printk(KERN_INFO "android_probe pdata: %p\n", pdata);
+
+ if (pdata) {
+ if (pdata->vendor_id)
+ device_desc.idVendor =
+ __constant_cpu_to_le16(pdata->vendor_id);
+ if (pdata->product_id) {
+ dev->product_id = pdata->product_id;
+ device_desc.idProduct =
+ __constant_cpu_to_le16(pdata->product_id);
+ }
+ if (pdata->adb_product_id)
+ dev->adb_product_id = pdata->adb_product_id;
+ if (pdata->version)
+ dev->version = pdata->version;
+
+ if (pdata->product_name)
+ strings_dev[STRING_PRODUCT_IDX].s = pdata->product_name;
+ if (pdata->manufacturer_name)
+ strings_dev[STRING_MANUFACTURER_IDX].s =
+ pdata->manufacturer_name;
+ if (pdata->serial_number)
+ strings_dev[STRING_SERIAL_IDX].s = pdata->serial_number;
+ dev->nluns = pdata->nluns;
+ }
+
+ return 0;
+}
+
+static struct platform_driver android_platform_driver = {
+ .driver = { .name = "android_usb", },
+ .probe = android_probe,
+};
+
+static int __init init(void)
+{
+ struct android_dev *dev;
+ int ret;
+
+ printk(KERN_INFO "android init\n");
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ /* set default values, which should be overridden by platform data */
+ dev->product_id = PRODUCT_ID;
+ dev->adb_product_id = ADB_PRODUCT_ID;
+ _android_dev = dev;
+
+ ret = platform_driver_register(&android_platform_driver);
+ if (ret)
+ return ret;
+ ret = misc_register(&adb_enable_device);
+ if (ret) {
+ platform_driver_unregister(&android_platform_driver);
+ return ret;
+ }
+ ret = usb_composite_register(&android_usb_driver);
+ if (ret) {
+ misc_deregister(&adb_enable_device);
+ platform_driver_unregister(&android_platform_driver);
+ }
+ return ret;
+}
+module_init(init);
+
+static void __exit cleanup(void)
+{
+ usb_composite_unregister(&android_usb_driver);
+ misc_deregister(&adb_enable_device);
+ platform_driver_unregister(&android_platform_driver);
+ kfree(_android_dev);
+ _android_dev = NULL;
+}
+module_exit(cleanup);