USB Composite gadget implementation for u-boot. It builds on top
of USB UDC drivers.
This commit is based on following files from Linux Kernel v2.6.36:
./include/linux/usb/composite.h
./drivers/usb/gadget/composite.c
SHA1: d187abb9a83e6c6b6e9f2ca17962bdeafb4bc903
Signed-off-by: Lukasz Majewski l.majew...@samsung.com
Signed-off-by: Kyungmin Park kyungmin.p...@samsung.com
Cc: Marek Vasut ma...@denx.de
---
drivers/usb/gadget/composite.c | 1082 +++
include/linux/usb/composite.h | 350 +
include/usb/lin_gadget_compat.h | 24 +-
3 files changed, 1454 insertions(+), 2 deletions(-)
create mode 100644 drivers/usb/gadget/composite.c
create mode 100644 include/linux/usb/composite.h
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
new file mode 100644
index 000..905077d
--- /dev/null
+++ b/drivers/usb/gadget/composite.c
@@ -0,0 +1,1082 @@
+/*
+ * composite.c - infrastructure for Composite USB Gadgets
+ *
+ * Copyright (C) 2006-2008 David Brownell
+ * U-boot porting: Lukasz Majewski l.majew...@samsung.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#undef DEBUG
+
+#include linux/bitops.h
+#include linux/usb/composite.h
+
+#define USB_BUFSIZ 4096
+
+static struct usb_composite_driver *composite;
+
+/**
+ * usb_add_function() - add a function to a configuration
+ * @config: the configuration
+ * @function: the function being added
+ * Context: single threaded during gadget setup
+ *
+ * After initialization, each configuration must have one or more
+ * functions added to it. Adding a function involves calling its @bind()
+ * method to allocate resources such as interface and string identifiers
+ * and endpoints.
+ *
+ * This function returns the value of the function's bind(), which is
+ * zero for success else a negative errno value.
+ */
+int usb_add_function(struct usb_configuration *config,
+ struct usb_function *function)
+{
+ int value = -EINVAL;
+
+ debug(adding '%s'/%p to config '%s'/%p\n,
+ function-name, function,
+ config-label, config);
+
+ if (!function-set_alt || !function-disable)
+ goto done;
+
+ function-config = config;
+ list_add_tail(function-list, config-functions);
+
+ if (function-bind) {
+ value = function-bind(config, function);
+ if (value 0) {
+ list_del(function-list);
+ function-config = NULL;
+ }
+ } else
+ value = 0;
+
+ if (!config-fullspeed function-descriptors)
+ config-fullspeed = 1;
+ if (!config-highspeed function-hs_descriptors)
+ config-highspeed = 1;
+
+done:
+ if (value)
+ debug(adding '%s'/%p -- %d\n,
+ function-name, function, value);
+ return value;
+}
+
+/**
+ * usb_function_deactivate - prevent function and gadget enumeration
+ * @function: the function that isn't yet ready to respond
+ *
+ * Blocks response of the gadget driver to host enumeration by
+ * preventing the data line pullup from being activated. This is
+ * normally called during @bind() processing to change from the
+ * initial ready to respond state, or when a required resource
+ * becomes available.
+ *
+ * For example, drivers that serve as a passthrough to a userspace
+ * daemon can block enumeration unless that daemon (such as an OBEX,
+ * MTP, or print server) is ready to handle host requests.
+ *
+ * Not all systems support software control of their USB peripheral
+ * data pullups.
+ *
+ * Returns zero on success, else negative errno.
+ */
+int usb_function_deactivate(struct usb_function *function)
+{
+ struct usb_composite_dev*cdev = function-config-cdev;
+ int status = 0;
+
+ if (cdev-deactivations == 0)
+ status = usb_gadget_disconnect(cdev-gadget);
+ if (status == 0)
+ cdev-deactivations++;
+
+ return status;
+}
+
+/**
+ * usb_function_activate - allow function and gadget enumeration
+ * @function: function on which usb_function_activate() was called
+ *
+ * Reverses effect of usb_function_deactivate(). If no more
