avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/drivers/usb/gadget/g_dnl.c

@@ -0,0 +1,292 @@
+/*
+ * g_dnl.c -- USB Downloader Gadget
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ * Lukasz Majewski  <l.majewski@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <malloc.h>
+
+#include <mmc.h>
+#include <part.h>
+#include <usb.h>
+
+#include <g_dnl.h>
+#include <usb_mass_storage.h>
+#include <dfu.h>
+#include <thor.h>
+
+#include "gadget_chips.h"
+#include "composite.c"
+
+/*
+ * One needs to define the following:
+ * CONFIG_G_DNL_VENDOR_NUM
+ * CONFIG_G_DNL_PRODUCT_NUM
+ * CONFIG_G_DNL_MANUFACTURER
+ * at e.g. ./configs/<board>_defconfig
+ */
+
+#define STRING_MANUFACTURER 25
+#define STRING_PRODUCT 2
+/* Index of String Descriptor describing this configuration */
+#define STRING_USBDOWN 2
+/* Index of String serial */
+#define STRING_SERIAL  3
+#define MAX_STRING_SERIAL	32
+/* Number of supported configurations */
+#define CONFIGURATION_NUMBER 1
+
+#define DRIVER_VERSION		"usb_dnl 2.0"
+
+static const char product[] = "USB download gadget";
+static char g_dnl_serial[MAX_STRING_SERIAL];
+static const char manufacturer[] = CONFIG_G_DNL_MANUFACTURER;
+
+void g_dnl_set_serialnumber(char *s)
+{
+	memset(g_dnl_serial, 0, MAX_STRING_SERIAL);
+	if (strlen(s) < MAX_STRING_SERIAL)
+		strncpy(g_dnl_serial, s, strlen(s));
+}
+
+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,
+	.bDeviceSubClass = 0, /*0x02:CDC-modem , 0x00:CDC-serial*/
+
+	.idVendor = __constant_cpu_to_le16(CONFIG_G_DNL_VENDOR_NUM),
+	.idProduct = __constant_cpu_to_le16(CONFIG_G_DNL_PRODUCT_NUM),
+	.iProduct = STRING_PRODUCT,
+	.iSerialNumber = STRING_SERIAL,
+	.bNumConfigurations = 1,
+};
+
+/*
+ * static strings, in UTF-8
+ * IDs for those strings are assigned dynamically at g_dnl_bind()
+ */
+static struct usb_string g_dnl_string_defs[] = {
+	{.s = manufacturer},
+	{.s = product},
+	{.s = g_dnl_serial},
+	{ }		/* end of list */
+};
+
+static struct usb_gadget_strings g_dnl_string_tab = {
+	.language = 0x0409, /* en-us */
+	.strings = g_dnl_string_defs,
+};
+
+static struct usb_gadget_strings *g_dnl_composite_strings[] = {
+	&g_dnl_string_tab,
+	NULL,
+};
+
+static int g_dnl_unbind(struct usb_composite_dev *cdev)
+{
+	struct usb_gadget *gadget = cdev->gadget;
+
+	debug("%s: calling usb_gadget_disconnect for "
+			"controller '%s'\n", __func__, gadget->name);
+	usb_gadget_disconnect(gadget);
+
+	return 0;
+}
+
+static inline struct g_dnl_bind_callback *g_dnl_bind_callback_first(void)
+{
+	return ll_entry_start(struct g_dnl_bind_callback,
+				g_dnl_bind_callbacks);
+}
+
+static inline struct g_dnl_bind_callback *g_dnl_bind_callback_end(void)
+{
+	return ll_entry_end(struct g_dnl_bind_callback,
+				g_dnl_bind_callbacks);
+}
+
+static int g_dnl_do_config(struct usb_configuration *c)
+{
+	const char *s = c->cdev->driver->name;
+	struct g_dnl_bind_callback *callback = g_dnl_bind_callback_first();
+
+	debug("%s: configuration: 0x%p composite dev: 0x%p\n",
+	      __func__, c, c->cdev);
+
+	for (; callback != g_dnl_bind_callback_end(); callback++)
+		if (!strcmp(s, callback->usb_function_name))
+			return callback->fptr(c);
+	return -ENODEV;
+}
+
+static int g_dnl_config_register(struct usb_composite_dev *cdev)
+{
+	struct usb_configuration *config;
+	const char *name = "usb_dnload";
+
+	config = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*config));
+	if (!config)
+		return -ENOMEM;
+
+	memset(config, 0, sizeof(*config));
+
+	config->label = name;
+	config->bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER;
+	config->bConfigurationValue = CONFIGURATION_NUMBER;
+	config->iConfiguration = STRING_USBDOWN;
+	config->bind = g_dnl_do_config;
+
+	return usb_add_config(cdev, config);
+}
+
+__weak
+int board_usb_init(int index, enum usb_init_type init)
+{
+	return 0;
+}
+
+__weak
+int board_usb_cleanup(int index, enum usb_init_type init)
+{
+	return 0;
+}
+
+__weak
+int g_dnl_bind_fixup(struct usb_device_descriptor *dev, const char *name)
+{
+	return 0;
+}
+
+__weak int g_dnl_get_board_bcd_device_number(int gcnum)
+{
+	return gcnum;
+}
+
+__weak int g_dnl_board_usb_cable_connected(void)
+{
+	return -EOPNOTSUPP;
+}
+
+static bool g_dnl_detach_request;
+
+bool g_dnl_detach(void)
+{
+	return g_dnl_detach_request;
+}
+
+void g_dnl_trigger_detach(void)
+{
+	g_dnl_detach_request = true;
+}
+
+void g_dnl_clear_detach(void)
+{
+	g_dnl_detach_request = false;
+}
+
+static int g_dnl_get_bcd_device_number(struct usb_composite_dev *cdev)
+{
+	struct usb_gadget *gadget = cdev->gadget;
+	int gcnum;
+
+	gcnum = usb_gadget_controller_number(gadget);
+	if (gcnum > 0)
+		gcnum += 0x200;
+
+	return g_dnl_get_board_bcd_device_number(gcnum);
+}
+
+static int g_dnl_bind(struct usb_composite_dev *cdev)
+{
+	struct usb_gadget *gadget = cdev->gadget;
+	int id, ret;
+	int gcnum;
+
+	debug("%s: gadget: 0x%p cdev: 0x%p\n", __func__, gadget, cdev);
+
+	id = usb_string_id(cdev);
+
+	if (id < 0)
+		return id;
+	g_dnl_string_defs[0].id = id;
+	device_desc.iManufacturer = id;
+
+	id = usb_string_id(cdev);
+	if (id < 0)
+		return id;
+
+	g_dnl_string_defs[1].id = id;
+	device_desc.iProduct = id;
+
+	id = usb_string_id(cdev);
+	if (id < 0)
+		return id;
+
+	g_dnl_string_defs[2].id = id;
+	device_desc.iSerialNumber = id;
+
+	g_dnl_bind_fixup(&device_desc, cdev->driver->name);
+	ret = g_dnl_config_register(cdev);
+	if (ret)
+		goto error;
+
+	gcnum = g_dnl_get_bcd_device_number(cdev);
+	if (gcnum >= 0)
+		device_desc.bcdDevice = cpu_to_le16(gcnum);
+	else {
+		debug("%s: controller '%s' not recognized\n",
+			__func__, gadget->name);
+		device_desc.bcdDevice = __constant_cpu_to_le16(0x9999);
+	}
+
+	debug("%s: calling usb_gadget_connect for "
+			"controller '%s'\n", __func__, gadget->name);
+	usb_gadget_connect(gadget);
+
+	return 0;
+
+ error:
+	g_dnl_unbind(cdev);
+	return -ENOMEM;
+}
+
+static struct usb_composite_driver g_dnl_driver = {
+	.name = NULL,
+	.dev = &device_desc,
+	.strings = g_dnl_composite_strings,
+
+	.bind = g_dnl_bind,
+	.unbind = g_dnl_unbind,
+};
+
+/*
+ * NOTICE:
+ * Registering via USB function name won't be necessary after rewriting
+ * g_dnl to support multiple USB functions.
+ */
+int g_dnl_register(const char *name)
+{
+	int ret;
+
+	debug("%s: g_dnl_driver.name = %s\n", __func__, name);
+	g_dnl_driver.name = name;
+
+	ret = usb_composite_register(&g_dnl_driver);
+	if (ret) {
+		printf("%s: failed!, error: %d\n", __func__, ret);
+		return ret;
+	}
+	return 0;
+}
+
+void g_dnl_unregister(void)
+{
+	usb_composite_unregister(&g_dnl_driver);
+}