USB: gadget: added f_accessory gadget driver for android USB accesories and applied all patches. (credit to tytung)
5d9d8625e3 and so on.This commit is contained in:
tytung
parent
aabb2fb32d
commit
2ef9a48295
@ -845,6 +845,12 @@ config USB_ANDROID_RNDIS_WCEIS
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If you enable this option, the device is no longer CDC ethernet
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compatible.
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config USB_ANDROID_ACCESSORY
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boolean "Android USB accessory function"
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depends on USB_ANDROID
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help
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Provides Android USB Accessory support for android gadget driver.
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config USB_ANDROID_SERIAL
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boolean "Android gadget Serial function"
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depends on USB_ANDROID
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@ -58,6 +58,7 @@ obj-$(CONFIG_USB_ANDROID_ACM) += f_acm.o u_serial.o
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obj-$(CONFIG_USB_ANDROID_ADB) += f_adb.o
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obj-$(CONFIG_USB_ANDROID_MASS_STORAGE) += f_mass_storage.o
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obj-$(CONFIG_USB_ANDROID_RNDIS) += f_rndis.o u_ether.o
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obj-$(CONFIG_USB_ANDROID_ACCESSORY) += f_accessory.o
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obj-$(CONFIG_USB_ANDROID_SERIAL) += serial.o u_serial.o
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obj-$(CONFIG_USB_ANDROID_PROJECTOR) += f_projector.o
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obj-$(CONFIG_USB_ANDROID_MTP) += f_mtp.o
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@ -65,6 +65,7 @@ struct android_dev {
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int num_functions;
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char **functions;
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int vendor_id;
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int product_id;
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int version;
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};
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@ -108,7 +109,7 @@ static struct usb_device_descriptor device_desc = {
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};
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static struct list_head _functions = LIST_HEAD_INIT(_functions);
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static int _registered_function_count = 0;
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static bool _are_functions_bound;
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static struct android_usb_function *get_function(const char *name)
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{
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@ -120,6 +121,50 @@ static struct android_usb_function *get_function(const char *name)
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return 0;
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}
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static bool are_functions_registered(struct android_dev *dev)
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{
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char **functions = dev->functions;
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int i;
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/* Look only for functions required by the board config */
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for (i = 0; i < dev->num_functions; i++) {
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char *name = *functions++;
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bool is_match = false;
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/* Could reuse get_function() here, but a reverse search
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* should yield less comparisons overall */
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struct android_usb_function *f;
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list_for_each_entry_reverse(f, &_functions, list) {
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if (!strcmp(name, f->name)) {
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is_match = true;
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break;
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}
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}
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if (is_match)
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continue;
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else
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return false;
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}
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return true;
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}
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static bool should_bind_functions(struct android_dev *dev)
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{
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/* Don't waste time if the main driver hasn't bound */
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if (!dev->config)
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return false;
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/* Don't waste time if we've already bound the functions */
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if (_are_functions_bound)
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return false;
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/* This call is the most costly, so call it last */
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if (!are_functions_registered(dev))
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return false;
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return true;
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}
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static void bind_functions(struct android_dev *dev)
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{
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struct android_usb_function *f;
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@ -134,6 +179,8 @@ static void bind_functions(struct android_dev *dev)
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else
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printk(KERN_ERR "function %s not found in bind_functions\n", name);
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}
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_are_functions_bound = true;
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}
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static int android_bind_config(struct usb_configuration *c)
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@ -143,8 +190,7 @@ static int android_bind_config(struct usb_configuration *c)
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printk(KERN_DEBUG "android_bind_config\n");
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dev->config = c;
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/* bind our functions if they have all registered */
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if (_registered_function_count == dev->num_functions)
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if (should_bind_functions(dev))
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bind_functions(dev);
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return 0;
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@ -188,7 +234,13 @@ static int product_has_function(struct android_usb_product *p,
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int i;
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for (i = 0; i < count; i++) {
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if (!strcmp(name, *functions++))
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/* For functions with multiple instances, usb_function.name
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* will have an index appended to the core name (ex: acm0),
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* while android_usb_product.functions[i] will only have the
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* core name (ex: acm). So, only compare up to the length of
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* android_usb_product.functions[i].
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*/
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if (!strncmp(name, functions[i], strlen(functions[i])))
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return 1;
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}
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return 0;
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@ -204,6 +256,22 @@ static int product_matches_functions(struct android_usb_product *p)
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return 1;
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}
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static int get_vendor_id(struct android_dev *dev)
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{
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struct android_usb_product *p = dev->products;
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int count = dev->num_products;
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int i;
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if (p) {
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for (i = 0; i < count; i++, p++) {
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if (p->vendor_id && product_matches_functions(p))
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return p->vendor_id;
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}
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}
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/* use default vendor ID */
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return dev->vendor_id;
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}
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static int get_product_id(struct android_dev *dev)
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{
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struct android_usb_product *p = dev->products;
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@ -224,7 +292,7 @@ static int 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, id, product_id, ret;
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int gcnum, id, ret;
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printk(KERN_INFO "android_bind\n");
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@ -274,8 +342,9 @@ static int android_bind(struct usb_composite_dev *cdev)
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usb_gadget_set_selfpowered(gadget);
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dev->cdev = cdev;
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product_id = get_product_id(dev);
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device_desc.idProduct = __constant_cpu_to_le16(product_id);
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device_desc.idVendor = __constant_cpu_to_le16(get_vendor_id(dev));
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device_desc.idProduct = __constant_cpu_to_le16(get_product_id(dev));
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cdev->desc.idVendor = device_desc.idVendor;
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cdev->desc.idProduct = device_desc.idProduct;
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return 0;
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@ -295,12 +364,8 @@ void android_register_function(struct android_usb_function *f)
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printk(KERN_INFO "android_register_function %s\n", f->name);
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list_add_tail(&f->list, &_functions);
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_registered_function_count++;
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/* bind our functions if they have all registered
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* and the main driver has bound.
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*/
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if (dev && dev->config && _registered_function_count == dev->num_functions)
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if (dev && should_bind_functions(dev))
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bind_functions(dev);
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}
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@ -308,14 +373,13 @@ void android_enable_function(struct usb_function *f, int enable)
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{
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struct android_dev *dev = _android_dev;
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int disable = !enable;
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int product_id;
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if (!!f->disabled != disable) {
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usb_function_set_enabled(f, !disable);
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#ifdef CONFIG_USB_ANDROID_RNDIS
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if (!strcmp(f->name, "rndis")) {
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struct usb_function *func;
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struct usb_function *func;
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/* We need to specify the COMM class in the device descriptor
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* if we are using RNDIS.
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@ -334,17 +398,32 @@ void android_enable_function(struct usb_function *f, int enable)
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*/
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list_for_each_entry(func, &android_config_driver.functions, list) {
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if (!strcmp(func->name, "usb_mass_storage")
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|| !strcmp(func->name, "mtp")) {
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|| !strcmp(func->name, "mtp")) {
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usb_function_set_enabled(func, !enable);
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}
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}
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}
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#endif
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#ifdef CONFIG_USB_ANDROID_ACCESSORY
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if (!strcmp(f->name, "accessory") && enable) {
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struct usb_function *func;
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product_id = get_product_id(dev);
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device_desc.idProduct = __constant_cpu_to_le16(product_id);
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if (dev->cdev)
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/* disable everything else (and keep adb for now) */
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list_for_each_entry(func, &android_config_driver.functions, list) {
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if (strcmp(func->name, "accessory")
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&& strcmp(func->name, "adb")) {
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usb_function_set_enabled(func, 0);
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}
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}
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}
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#endif
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device_desc.idVendor = __constant_cpu_to_le16(get_vendor_id(dev));
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device_desc.idProduct = __constant_cpu_to_le16(get_product_id(dev));
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if (dev->cdev) {
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dev->cdev->desc.idVendor = device_desc.idVendor;
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dev->cdev->desc.idProduct = device_desc.idProduct;
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}
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usb_composite_force_reset(dev->cdev);
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}
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}
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@ -372,9 +451,11 @@ static int android_probe(struct platform_device *pdev)
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dev->num_products = pdata->num_products;
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dev->functions = pdata->functions;
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dev->num_functions = pdata->num_functions;
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if (pdata->vendor_id)
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if (pdata->vendor_id) {
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dev->vendor_id = 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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}
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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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808
drivers/usb/gadget/f_accessory.c
Normal file
808
drivers/usb/gadget/f_accessory.c
Normal file
@ -0,0 +1,808 @@
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/*
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* Gadget Function Driver for Android USB accessories
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*
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* Copyright (C) 2011 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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/* #define DEBUG */
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/* #define VERBOSE_DEBUG */
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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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#include <linux/kthread.h>
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#include <linux/freezer.h>
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#include <linux/types.h>
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#include <linux/file.h>
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#include <linux/device.h>
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#include <linux/miscdevice.h>
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#include <linux/usb.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/android_composite.h>
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#include <linux/usb/f_accessory.h>
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#define BULK_BUFFER_SIZE 16384
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#define ACC_STRING_SIZE 256
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#define PROTOCOL_VERSION 1
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/* String IDs */
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#define INTERFACE_STRING_INDEX 0
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/* number of tx and rx requests to allocate */
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#define TX_REQ_MAX 4
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#define RX_REQ_MAX 2
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struct acc_dev {
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struct usb_function function;
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struct usb_composite_dev *cdev;
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spinlock_t lock;
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struct usb_ep *ep_in;
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struct usb_ep *ep_out;
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/* set to 1 when we connect */
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int online:1;
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/* Set to 1 when we disconnect.
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* Not cleared until our file is closed.
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*/
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int disconnected:1;
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/* strings sent by the host */
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char manufacturer[ACC_STRING_SIZE];
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char model[ACC_STRING_SIZE];
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char description[ACC_STRING_SIZE];
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char version[ACC_STRING_SIZE];
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char uri[ACC_STRING_SIZE];
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char serial[ACC_STRING_SIZE];
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/* for acc_complete_set_string */
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int string_index;
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/* synchronize access to our device file */
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atomic_t open_excl;
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struct list_head tx_idle;
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wait_queue_head_t read_wq;
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wait_queue_head_t write_wq;
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struct usb_request *rx_req[RX_REQ_MAX];
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int rx_done;
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struct delayed_work work;
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};
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static struct usb_interface_descriptor acc_interface_desc = {
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.bLength = USB_DT_INTERFACE_SIZE,
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.bDescriptorType = USB_DT_INTERFACE,
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.bInterfaceNumber = 0,
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.bNumEndpoints = 2,
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.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
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.bInterfaceSubClass = USB_SUBCLASS_VENDOR_SPEC,
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.bInterfaceProtocol = 0,
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};
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static struct usb_endpoint_descriptor acc_highspeed_in_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = __constant_cpu_to_le16(512),
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};
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static struct usb_endpoint_descriptor acc_highspeed_out_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_OUT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = __constant_cpu_to_le16(512),
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};
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static struct usb_endpoint_descriptor acc_fullspeed_in_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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};
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static struct usb_endpoint_descriptor acc_fullspeed_out_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_OUT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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};
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static struct usb_descriptor_header *fs_acc_descs[] = {
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(struct usb_descriptor_header *) &acc_interface_desc,
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(struct usb_descriptor_header *) &acc_fullspeed_in_desc,
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(struct usb_descriptor_header *) &acc_fullspeed_out_desc,
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NULL,
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};
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static struct usb_descriptor_header *hs_acc_descs[] = {
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(struct usb_descriptor_header *) &acc_interface_desc,
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(struct usb_descriptor_header *) &acc_highspeed_in_desc,
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(struct usb_descriptor_header *) &acc_highspeed_out_desc,
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NULL,
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};
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static struct usb_string acc_string_defs[] = {
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[INTERFACE_STRING_INDEX].s = "Android Accessory Interface",
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{ }, /* end of list */
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};
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static struct usb_gadget_strings acc_string_table = {
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.language = 0x0409, /* en-US */
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.strings = acc_string_defs,
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};
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static struct usb_gadget_strings *acc_strings[] = {
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&acc_string_table,
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NULL,
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};
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/* temporary variable used between acc_open() and acc_gadget_bind() */
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static struct acc_dev *_acc_dev;
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static inline struct acc_dev *func_to_dev(struct usb_function *f)
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{
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return container_of(f, struct acc_dev, function);
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}
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static struct usb_request *acc_request_new(struct usb_ep *ep, int buffer_size)
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{
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struct usb_request *req = usb_ep_alloc_request(ep, GFP_KERNEL);
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if (!req)
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return NULL;
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/* now allocate buffers for the requests */
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req->buf = kmalloc(buffer_size, GFP_KERNEL);
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if (!req->buf) {
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usb_ep_free_request(ep, req);
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return NULL;
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}
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return req;
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}
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static void acc_request_free(struct usb_request *req, struct usb_ep *ep)
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{
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if (req) {
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kfree(req->buf);
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usb_ep_free_request(ep, req);
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}
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}
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/* add a request to the tail of a list */
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static void req_put(struct acc_dev *dev, struct list_head *head,
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struct usb_request *req)
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{
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unsigned long flags;
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spin_lock_irqsave(&dev->lock, flags);
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list_add_tail(&req->list, head);
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spin_unlock_irqrestore(&dev->lock, flags);
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}
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/* remove a request from the head of a list */
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static struct usb_request *req_get(struct acc_dev *dev, struct list_head *head)
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{
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unsigned long flags;
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struct usb_request *req;
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spin_lock_irqsave(&dev->lock, flags);
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if (list_empty(head)) {
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req = 0;
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} else {
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req = list_first_entry(head, struct usb_request, list);
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list_del(&req->list);
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}
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spin_unlock_irqrestore(&dev->lock, flags);
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return req;
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}
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static void acc_set_disconnected(struct acc_dev *dev)
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{
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||||
dev->online = 0;
|
||||
dev->disconnected = 1;
|
||||
}
|
||||
|
||||
static void acc_complete_in(struct usb_ep *ep, struct usb_request *req)
|
||||
{
|
||||
struct acc_dev *dev = _acc_dev;
|
||||
|
||||
if (req->status != 0)
|
||||
acc_set_disconnected(dev);
|
||||
|
||||
req_put(dev, &dev->tx_idle, req);
|
||||
|
||||
wake_up(&dev->write_wq);
|
||||
}
|
||||
|
||||
static void acc_complete_out(struct usb_ep *ep, struct usb_request *req)
|
||||
{
|
||||
struct acc_dev *dev = _acc_dev;
|
||||
|
||||
dev->rx_done = 1;
|
||||
if (req->status != 0)
|
||||
acc_set_disconnected(dev);
|
||||
|
||||
wake_up(&dev->read_wq);
|
||||
}
|
||||
|
||||
static void acc_complete_set_string(struct usb_ep *ep, struct usb_request *req)
|
||||
{
|
||||
struct acc_dev *dev = ep->driver_data;
|
||||
struct usb_composite_dev *cdev = dev->cdev;
|
||||
char *string_dest = NULL;
|
||||
int length = req->actual;
|
||||
|
||||
if (req->status != 0) {
|
||||
DBG(cdev, "acc_complete_set_string, err %d\n", req->status);
|
||||
return;
|
||||
}
|
||||
|
||||
switch (dev->string_index) {
|
||||
case ACCESSORY_STRING_MANUFACTURER:
|
||||
string_dest = dev->manufacturer;
|
||||
break;
|
||||
case ACCESSORY_STRING_MODEL:
|
||||
string_dest = dev->model;
|
||||
break;
|
||||
case ACCESSORY_STRING_DESCRIPTION:
|
||||
string_dest = dev->description;
|
||||
break;
|
||||
case ACCESSORY_STRING_VERSION:
|
||||
string_dest = dev->version;
|
||||
break;
|
||||
case ACCESSORY_STRING_URI:
|
||||
string_dest = dev->uri;
|
||||
break;
|
||||
case ACCESSORY_STRING_SERIAL:
|
||||
string_dest = dev->serial;
|
||||
break;
|
||||
}
|
||||
if (string_dest) {
|
||||
unsigned long flags;
|
||||
|
||||
if (length >= ACC_STRING_SIZE)
|
||||
length = ACC_STRING_SIZE - 1;
|
||||
|
||||
spin_lock_irqsave(&dev->lock, flags);
|
||||
memcpy(string_dest, cdev->req->buf, length);
|
||||
/* ensure zero termination */
|
||||
string_dest[length] = 0;
|
||||
spin_unlock_irqrestore(&dev->lock, flags);
|
||||
} else {
|
||||
DBG(cdev, "unknown accessory string index %d\n",
|
||||
dev->string_index);
|
||||
}
|
||||
}
|
||||
|
||||
static int __init create_bulk_endpoints(struct acc_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);
|
||||
ep->driver_data = dev; /* claim the endpoint */
|
||||
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 ep_out got %s\n", ep->name);
|
||||
ep->driver_data = dev; /* claim the endpoint */
|
||||
dev->ep_out = 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 ep_out got %s\n", ep->name);
|
||||
ep->driver_data = dev; /* claim the endpoint */
|
||||
dev->ep_out = ep;
|
||||
|
||||
/* now allocate requests for our endpoints */
|
||||
for (i = 0; i < TX_REQ_MAX; i++) {
|
||||
req = acc_request_new(dev->ep_in, BULK_BUFFER_SIZE);
|
||||
if (!req)
|
||||
goto fail;
|
||||
req->complete = acc_complete_in;
|
||||
req_put(dev, &dev->tx_idle, req);
|
||||
}
|
||||
for (i = 0; i < RX_REQ_MAX; i++) {
|
||||
req = acc_request_new(dev->ep_out, BULK_BUFFER_SIZE);
|
||||
if (!req)
|
||||
goto fail;
|
||||
req->complete = acc_complete_out;
|
||||
dev->rx_req[i] = req;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
fail:
|
||||
printk(KERN_ERR "acc_bind() could not allocate requests\n");
|
||||
while ((req = req_get(dev, &dev->tx_idle)))
|
||||
acc_request_free(req, dev->ep_in);
|
||||
for (i = 0; i < RX_REQ_MAX; i++)
|
||||
acc_request_free(dev->rx_req[i], dev->ep_out);
|
||||
return -1;
|
||||
}
|
||||
|
||||
static ssize_t acc_read(struct file *fp, char __user *buf,
|
||||
size_t count, loff_t *pos)
|
||||
{
|
||||
struct acc_dev *dev = fp->private_data;
|
||||
struct usb_composite_dev *cdev = dev->cdev;
|
||||
struct usb_request *req;
|
||||
int r = count, xfer;
|
||||
int ret = 0;
|
||||
|
||||
DBG(cdev, "acc_read(%d)\n", count);
|
||||
|
||||
if (dev->disconnected)
|
||||
return -ENODEV;
|
||||
|
||||
if (count > BULK_BUFFER_SIZE)
|
||||
count = BULK_BUFFER_SIZE;
|
||||
|
||||
/* we will block until we're online */
|
||||
DBG(cdev, "acc_read: waiting for online\n");
|
||||
ret = wait_event_interruptible(dev->read_wq, dev->online);
|
||||
if (ret < 0) {
|
||||
r = ret;
|
||||
goto done;
|
||||
}
|
||||
|
||||
requeue_req:
|
||||
/* queue a request */
|
||||
req = dev->rx_req[0];
|
||||
req->length = count;
|
||||
dev->rx_done = 0;
|
||||
ret = usb_ep_queue(dev->ep_out, req, GFP_KERNEL);
|
||||
if (ret < 0) {
|
||||
r = -EIO;
|
||||
goto done;
|
||||
} else {
|
||||
DBG(cdev, "rx %p queue\n", req);
|
||||
}
|
||||
|
||||
/* wait for a request to complete */
|
||||
ret = wait_event_interruptible(dev->read_wq, dev->rx_done);
|
||||
if (ret < 0) {
|
||||
r = ret;
|
||||
usb_ep_dequeue(dev->ep_out, req);
|
||||
goto done;
|
||||
}
|
||||
if (dev->online) {
|
||||
/* If we got a 0-len packet, throw it back and try again. */
|
||||
if (req->actual == 0)
|
||||
goto requeue_req;
|
||||
|
||||
DBG(cdev, "rx %p %d\n", req, req->actual);
|
||||
xfer = (req->actual < count) ? req->actual : count;
|
||||
r = xfer;
|
||||
if (copy_to_user(buf, req->buf, xfer))
|
||||
r = -EFAULT;
|
||||
} else
|
||||
r = -EIO;
|
||||
|
||||
done:
|
||||
DBG(cdev, "acc_read returning %d\n", r);
|
||||
return r;
|
||||
}
|
||||
|
||||
static ssize_t acc_write(struct file *fp, const char __user *buf,
|
||||
size_t count, loff_t *pos)
|
||||
{
|
||||
struct acc_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, "acc_write(%d)\n", count);
|
||||
|
||||
if (!dev->online || dev->disconnected)
|
||||
return -ENODEV;
|
||||
|
||||
while (count > 0) {
|
||||
if (!dev->online) {
|
||||
DBG(cdev, "acc_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->online));
|
||||
if (!req) {
|
||||
r = ret;
|
||||
break;
|
||||
}
|
||||
|
||||
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_KERNEL);
|
||||
if (ret < 0) {
|
||||
DBG(cdev, "acc_write: xfer error %d\n", ret);
|
||||
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);
|
||||
|
||||
DBG(cdev, "acc_write returning %d\n", r);
|
||||
return r;
|
||||
}
|
||||
|
||||
static long acc_ioctl(struct file *fp, unsigned code, unsigned long value)
|
||||
{
|
||||
struct acc_dev *dev = fp->private_data;
|
||||
char *src = NULL;
|
||||
int ret;
|
||||
|
||||
if (dev->function.disabled)
|
||||
return -ENODEV;
|
||||
|
||||
switch (code) {
|
||||
case ACCESSORY_GET_STRING_MANUFACTURER:
|
||||
src = dev->manufacturer;
|
||||
break;
|
||||
case ACCESSORY_GET_STRING_MODEL:
|
||||
src = dev->model;
|
||||
break;
|
||||
case ACCESSORY_GET_STRING_DESCRIPTION:
|
||||
src = dev->description;
|
||||
break;
|
||||
case ACCESSORY_GET_STRING_VERSION:
|
||||
src = dev->version;
|
||||
break;
|
||||
case ACCESSORY_GET_STRING_URI:
|
||||
src = dev->uri;
|
||||
break;
|
||||
case ACCESSORY_GET_STRING_SERIAL:
|
||||
src = dev->serial;
|
||||
break;
|
||||
}
|
||||
if (!src)
|
||||
return -EINVAL;
|
||||
|
||||
ret = strlen(src) + 1;
|
||||
if (copy_to_user((void __user *)value, src, ret))
|
||||
ret = -EFAULT;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int acc_open(struct inode *ip, struct file *fp)
|
||||
{
|
||||
printk(KERN_INFO "acc_open\n");
|
||||
if (atomic_xchg(&_acc_dev->open_excl, 1))
|
||||
return -EBUSY;
|
||||
|
||||
_acc_dev->disconnected = 0;
|
||||
fp->private_data = _acc_dev;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int acc_release(struct inode *ip, struct file *fp)
|
||||
{
|
||||
printk(KERN_INFO "acc_release\n");
|
||||
|
||||
WARN_ON(!atomic_xchg(&_acc_dev->open_excl, 0));
|
||||
_acc_dev->disconnected = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* file operations for /dev/acc_usb */
|
||||
static const struct file_operations acc_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.read = acc_read,
|
||||
.write = acc_write,
|
||||
.unlocked_ioctl = acc_ioctl,
|
||||
.open = acc_open,
|
||||
.release = acc_release,
|
||||
};
|
||||
|
||||
static struct miscdevice acc_device = {
|
||||
.minor = MISC_DYNAMIC_MINOR,
|
||||
.name = "usb_accessory",
|
||||
.fops = &acc_fops,
|
||||
};
|
||||
|
||||
static int
|
||||
acc_function_bind(struct usb_configuration *c, struct usb_function *f)
|
||||
{
|
||||
struct usb_composite_dev *cdev = c->cdev;
|
||||
struct acc_dev *dev = func_to_dev(f);
|
||||
int id;
|
||||
int ret;
|
||||
|
||||
dev->cdev = cdev;
|
||||
DBG(cdev, "acc_function_bind dev: %p\n", dev);
|
||||
|
||||
/* allocate interface ID(s) */
|
||||
id = usb_interface_id(c, f);
|
||||
if (id < 0)
|
||||
return id;
|
||||
acc_interface_desc.bInterfaceNumber = id;
|
||||
|
||||
/* allocate endpoints */
|
||||
ret = create_bulk_endpoints(dev, &acc_fullspeed_in_desc,
|
||||
&acc_fullspeed_out_desc);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/* support high speed hardware */
|
||||
if (gadget_is_dualspeed(c->cdev->gadget)) {
|
||||
acc_highspeed_in_desc.bEndpointAddress =
|
||||
acc_fullspeed_in_desc.bEndpointAddress;
|
||||
acc_highspeed_out_desc.bEndpointAddress =
|
||||
acc_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
|
||||
acc_function_unbind(struct usb_configuration *c, struct usb_function *f)
|
||||
{
|
||||
struct acc_dev *dev = func_to_dev(f);
|
||||
struct usb_request *req;
|
||||
int i;
|
||||
|
||||
spin_lock_irq(&dev->lock);
|
||||
while ((req = req_get(dev, &dev->tx_idle)))
|
||||
acc_request_free(req, dev->ep_in);
|
||||
for (i = 0; i < RX_REQ_MAX; i++)
|
||||
acc_request_free(dev->rx_req[i], dev->ep_out);
|
||||
dev->online = 0;
|
||||
spin_unlock_irq(&dev->lock);
|
||||
|
||||
misc_deregister(&acc_device);
|
||||
kfree(_acc_dev);
|
||||
_acc_dev = NULL;
|
||||
}
|
||||
|
||||
static void acc_work(struct work_struct *data)
|
||||
{
|
||||
struct delayed_work *delayed = to_delayed_work(data);
|
||||
struct acc_dev *dev =
|
||||
container_of(delayed, struct acc_dev, work);
|
||||
android_enable_function(&dev->function, 1);
|
||||
}
|
||||
|
||||
static int acc_function_setup(struct usb_function *f,
|
||||
const struct usb_ctrlrequest *ctrl)
|
||||
{
|
||||
struct acc_dev *dev = func_to_dev(f);
|
||||
struct usb_composite_dev *cdev = dev->cdev;
|
||||
int value = -EOPNOTSUPP;
|
||||
u8 b_requestType = ctrl->bRequestType;
|
||||
u8 b_request = ctrl->bRequest;
|
||||
u16 w_index = le16_to_cpu(ctrl->wIndex);
|
||||
u16 w_value = le16_to_cpu(ctrl->wValue);
|
||||
u16 w_length = le16_to_cpu(ctrl->wLength);
|
||||
|
||||
/*
|
||||
printk(KERN_INFO "acc_function_setup "
|
||||
"%02x.%02x v%04x i%04x l%u\n",
|
||||
b_requestType, b_request,
|
||||
w_value, w_index, w_length);
|
||||
*/
|
||||
|
||||
if (dev->function.disabled) {
|
||||
if (b_requestType == (USB_DIR_OUT | USB_TYPE_VENDOR)) {
|
||||
if (b_request == ACCESSORY_START) {
|
||||
schedule_delayed_work(
|
||||
&dev->work, msecs_to_jiffies(10));
|
||||
value = 0;
|
||||
} else if (b_request == ACCESSORY_SEND_STRING) {
|
||||
dev->string_index = w_index;
|
||||
cdev->gadget->ep0->driver_data = dev;
|
||||
cdev->req->complete = acc_complete_set_string;
|
||||
value = w_length;
|
||||
}
|
||||
} else if (b_requestType == (USB_DIR_IN | USB_TYPE_VENDOR)) {
|
||||
if (b_request == ACCESSORY_GET_PROTOCOL) {
|
||||
*((u16 *)cdev->req->buf) = PROTOCOL_VERSION;
|
||||
value = sizeof(u16);
|
||||
|
||||
/* clear any strings left over from a previous session */
|
||||
memset(dev->manufacturer, 0, sizeof(dev->manufacturer));
|
||||
memset(dev->model, 0, sizeof(dev->model));
|
||||
memset(dev->description, 0, sizeof(dev->description));
|
||||
memset(dev->version, 0, sizeof(dev->version));
|
||||
memset(dev->uri, 0, sizeof(dev->uri));
|
||||
memset(dev->serial, 0, sizeof(dev->serial));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (value >= 0) {
|
||||
cdev->req->zero = 0;
|
||||
cdev->req->length = value;
|
||||
value = usb_ep_queue(cdev->gadget->ep0, cdev->req, GFP_ATOMIC);
|
||||
if (value < 0)
|
||||
ERROR(cdev, "%s setup response queue error\n",
|
||||
__func__);
|
||||
}
|
||||
|
||||
if (value == -EOPNOTSUPP)
|
||||
VDBG(cdev,
|
||||
"unknown class-specific control req "
|
||||
"%02x.%02x v%04x i%04x l%u\n",
|
||||
ctrl->bRequestType, ctrl->bRequest,
|
||||
w_value, w_index, w_length);
|
||||
return value;
|
||||
}
|
||||
|
||||
static int acc_function_set_alt(struct usb_function *f,
|
||||
unsigned intf, unsigned alt)
|
||||
{
|
||||
struct acc_dev *dev = func_to_dev(f);
|
||||
struct usb_composite_dev *cdev = f->config->cdev;
|
||||
int ret;
|
||||
|
||||
DBG(cdev, "acc_function_set_alt intf: %d alt: %d\n", intf, alt);
|
||||
ret = usb_ep_enable(dev->ep_in,
|
||||
ep_choose(cdev->gadget,
|
||||
&acc_highspeed_in_desc,
|
||||
&acc_fullspeed_in_desc));
|
||||
if (ret)
|
||||
return ret;
|
||||
ret = usb_ep_enable(dev->ep_out,
|
||||
ep_choose(cdev->gadget,
|
||||
&acc_highspeed_out_desc,
|
||||
&acc_fullspeed_out_desc));
|
||||
if (ret) {
|
||||
usb_ep_disable(dev->ep_in);
|
||||
return ret;
|
||||
}
|
||||
if (!dev->function.disabled)
|
||||
dev->online = 1;
|
||||
|
||||
/* readers may be blocked waiting for us to go online */
|
||||
wake_up(&dev->read_wq);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void acc_function_disable(struct usb_function *f)
|
||||
{
|
||||
struct acc_dev *dev = func_to_dev(f);
|
||||
struct usb_composite_dev *cdev = dev->cdev;
|
||||
|
||||
DBG(cdev, "acc_function_disable\n");
|
||||
acc_set_disconnected(dev);
|
||||
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);
|
||||
}
|
||||
|
||||
static int acc_bind_config(struct usb_configuration *c)
|
||||
{
|
||||
struct acc_dev *dev;
|
||||
int ret;
|
||||
|
||||
printk(KERN_INFO "acc_bind_config\n");
|
||||
|
||||
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
|
||||
if (!dev)
|
||||
return -ENOMEM;
|
||||
|
||||
/* allocate a string ID for our interface */
|
||||
if (acc_string_defs[INTERFACE_STRING_INDEX].id == 0) {
|
||||
ret = usb_string_id(c->cdev);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
acc_string_defs[INTERFACE_STRING_INDEX].id = ret;
|
||||
acc_interface_desc.iInterface = ret;
|
||||
}
|
||||
|
||||
spin_lock_init(&dev->lock);
|
||||
init_waitqueue_head(&dev->read_wq);
|
||||
init_waitqueue_head(&dev->write_wq);
|
||||
atomic_set(&dev->open_excl, 0);
|
||||
INIT_LIST_HEAD(&dev->tx_idle);
|
||||
INIT_DELAYED_WORK(&dev->work, acc_work);
|
||||
|
||||
dev->cdev = c->cdev;
|
||||
dev->function.name = "accessory";
|
||||
dev->function.strings = acc_strings,
|
||||
dev->function.descriptors = fs_acc_descs;
|
||||
dev->function.hs_descriptors = hs_acc_descs;
|
||||
dev->function.bind = acc_function_bind;
|
||||
dev->function.unbind = acc_function_unbind;
|
||||
dev->function.setup = acc_function_setup;
|
||||
dev->function.set_alt = acc_function_set_alt;
|
||||
dev->function.disable = acc_function_disable;
|
||||
dev->function.disabled = 1;
|
||||
|
||||
/* _acc_dev must be set before calling usb_gadget_register_driver */
|
||||
_acc_dev = dev;
|
||||
|
||||
ret = misc_register(&acc_device);
|
||||
if (ret)
|
||||
goto err1;
|
||||
|
||||
ret = usb_add_function(c, &dev->function);
|
||||
if (ret)
|
||||
goto err2;
|
||||
|
||||
return 0;
|
||||
|
||||
err2:
|
||||
misc_deregister(&acc_device);
|
||||
err1:
|
||||
kfree(dev);
|
||||
printk(KERN_ERR "USB accessory gadget driver failed to initialize\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct android_usb_function acc_function = {
|
||||
.name = "accessory",
|
||||
.bind_config = acc_bind_config,
|
||||
};
|
||||
|
||||
static int __init init(void)
|
||||
{
|
||||
printk(KERN_INFO "f_accessory init\n");
|
||||
android_register_function(&acc_function);
|
||||
return 0;
|
||||
}
|
||||
module_init(init);
|
||||
@ -27,7 +27,12 @@ struct android_usb_function {
|
||||
};
|
||||
|
||||
struct android_usb_product {
|
||||
/* Default product ID. */
|
||||
/* Vendor ID for this set of functions.
|
||||
* Default vendor_id in platform data will be used if this is zero.
|
||||
*/
|
||||
__u16 vendor_id;
|
||||
|
||||
/* Product ID for this set of functions. */
|
||||
__u16 product_id;
|
||||
|
||||
/* List of function names associated with this product.
|
||||
|
||||
81
include/linux/usb/f_accessory.h
Normal file
81
include/linux/usb/f_accessory.h
Normal file
@ -0,0 +1,81 @@
|
||||
/*
|
||||
* Gadget Function Driver for Android USB accessories
|
||||
*
|
||||
* Copyright (C) 2011 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_F_ACCESSORY_H
|
||||
#define __LINUX_USB_F_ACCESSORY_H
|
||||
|
||||
/* Use Google Vendor ID when in accessory mode */
|
||||
#define USB_ACCESSORY_VENDOR_ID 0x18D1
|
||||
|
||||
|
||||
/* Product ID to use when in accessory mode */
|
||||
#define USB_ACCESSORY_PRODUCT_ID 0x2D00
|
||||
|
||||
/* Product ID to use when in accessory mode and adb is enabled */
|
||||
#define USB_ACCESSORY_ADB_PRODUCT_ID 0x2D01
|
||||
|
||||
/* Indexes for strings sent by the host via ACCESSORY_SEND_STRING */
|
||||
#define ACCESSORY_STRING_MANUFACTURER 0
|
||||
#define ACCESSORY_STRING_MODEL 1
|
||||
#define ACCESSORY_STRING_DESCRIPTION 2
|
||||
#define ACCESSORY_STRING_VERSION 3
|
||||
#define ACCESSORY_STRING_URI 4
|
||||
#define ACCESSORY_STRING_SERIAL 5
|
||||
|
||||
/* Control request for retrieving device's protocol version (currently 1)
|
||||
*
|
||||
* requestType: USB_DIR_IN | USB_TYPE_VENDOR
|
||||
* request: ACCESSORY_GET_PROTOCOL
|
||||
* value: 0
|
||||
* index: 0
|
||||
* data version number (16 bits little endian)
|
||||
*/
|
||||
#define ACCESSORY_GET_PROTOCOL 51
|
||||
|
||||
/* Control request for host to send a string to the device
|
||||
*
|
||||
* requestType: USB_DIR_OUT | USB_TYPE_VENDOR
|
||||
* request: ACCESSORY_SEND_STRING
|
||||
* value: 0
|
||||
* index: string ID
|
||||
* data zero terminated UTF8 string
|
||||
*
|
||||
* The device can later retrieve these strings via the
|
||||
* ACCESSORY_GET_STRING_* ioctls
|
||||
*/
|
||||
#define ACCESSORY_SEND_STRING 52
|
||||
|
||||
/* Control request for starting device in accessory mode.
|
||||
* The host sends this after setting all its strings to the device.
|
||||
*
|
||||
* requestType: USB_DIR_OUT | USB_TYPE_VENDOR
|
||||
* request: ACCESSORY_START
|
||||
* value: 0
|
||||
* index: 0
|
||||
* data none
|
||||
*/
|
||||
#define ACCESSORY_START 53
|
||||
|
||||
/* ioctls for retrieving strings set by the host */
|
||||
#define ACCESSORY_GET_STRING_MANUFACTURER _IOW('M', 1, char[256])
|
||||
#define ACCESSORY_GET_STRING_MODEL _IOW('M', 2, char[256])
|
||||
#define ACCESSORY_GET_STRING_DESCRIPTION _IOW('M', 3, char[256])
|
||||
#define ACCESSORY_GET_STRING_VERSION _IOW('M', 4, char[256])
|
||||
#define ACCESSORY_GET_STRING_URI _IOW('M', 5, char[256])
|
||||
#define ACCESSORY_GET_STRING_SERIAL _IOW('M', 6, char[256])
|
||||
|
||||
#endif /* __LINUX_USB_F_ACCESSORY_H */
|
||||
Loading…
Reference in New Issue
Block a user