2 * g_dnl.c -- USB Downloader Gadget
4 * Copyright (C) 2012 Samsung Electronics
5 * Lukasz Majewski <l.majewski@samsung.com>
7 * SPDX-License-Identifier: GPL-2.0+
20 #include "gadget_chips.h"
21 #include "composite.c"
22 #include "f_mass_storage.c"
25 * One needs to define the following:
26 * CONFIG_G_DNL_VENDOR_NUM
27 * CONFIG_G_DNL_PRODUCT_NUM
28 * CONFIG_G_DNL_MANUFACTURER
29 * at e.g. ./include/configs/<board>.h
32 #define STRING_MANUFACTURER 25
33 #define STRING_PRODUCT 2
34 #define STRING_USBDOWN 2
35 #define CONFIG_USBDOWNLOADER 2
37 #define DRIVER_VERSION "usb_dnl 2.0"
39 static const char shortname[] = "usb_dnl_";
40 static const char product[] = "USB download gadget";
41 static const char manufacturer[] = CONFIG_G_DNL_MANUFACTURER;
43 static struct usb_device_descriptor device_desc = {
44 .bLength = sizeof device_desc,
45 .bDescriptorType = USB_DT_DEVICE,
47 .bcdUSB = __constant_cpu_to_le16(0x0200),
48 .bDeviceClass = USB_CLASS_COMM,
49 .bDeviceSubClass = 0x02, /*0x02:CDC-modem , 0x00:CDC-serial*/
51 .idVendor = __constant_cpu_to_le16(CONFIG_G_DNL_VENDOR_NUM),
52 .idProduct = __constant_cpu_to_le16(CONFIG_G_DNL_PRODUCT_NUM),
53 .iProduct = STRING_PRODUCT,
54 .bNumConfigurations = 1,
57 /* static strings, in UTF-8 */
58 static struct usb_string g_dnl_string_defs[] = {
64 static struct usb_gadget_strings g_dnl_string_tab = {
65 .language = 0x0409, /* en-us */
66 .strings = g_dnl_string_defs,
69 static struct usb_gadget_strings *g_dnl_composite_strings[] = {
74 static int g_dnl_unbind(struct usb_composite_dev *cdev)
76 struct usb_gadget *gadget = cdev->gadget;
78 debug("%s: calling usb_gadget_disconnect for "
79 "controller '%s'\n", shortname, gadget->name);
80 usb_gadget_disconnect(gadget);
85 static int g_dnl_do_config(struct usb_configuration *c)
87 const char *s = c->cdev->driver->name;
90 debug("%s: configuration: 0x%p composite dev: 0x%p\n",
91 __func__, c, c->cdev);
93 printf("GADGET DRIVER: %s\n", s);
94 if (!strcmp(s, "usb_dnl_dfu"))
96 else if (!strcmp(s, "usb_dnl_ums"))
102 static int g_dnl_config_register(struct usb_composite_dev *cdev)
104 static struct usb_configuration config = {
105 .label = "usb_dnload",
106 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
107 .bConfigurationValue = CONFIG_USBDOWNLOADER,
108 .iConfiguration = STRING_USBDOWN,
110 .bind = g_dnl_do_config,
113 return usb_add_config(cdev, &config);
117 int g_dnl_bind_fixup(struct usb_device_descriptor *dev)
122 static int g_dnl_bind(struct usb_composite_dev *cdev)
124 struct usb_gadget *gadget = cdev->gadget;
128 debug("%s: gadget: 0x%p cdev: 0x%p\n", __func__, gadget, cdev);
130 id = usb_string_id(cdev);
134 g_dnl_string_defs[0].id = id;
135 device_desc.iManufacturer = id;
137 id = usb_string_id(cdev);
141 g_dnl_string_defs[1].id = id;
142 device_desc.iProduct = id;
144 g_dnl_bind_fixup(&device_desc);
145 ret = g_dnl_config_register(cdev);
149 gcnum = usb_gadget_controller_number(gadget);
151 debug("gcnum: %d\n", gcnum);
153 device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum);
155 debug("%s: controller '%s' not recognized\n",
156 shortname, gadget->name);
157 device_desc.bcdDevice = __constant_cpu_to_le16(0x9999);
160 debug("%s: calling usb_gadget_connect for "
161 "controller '%s'\n", shortname, gadget->name);
162 usb_gadget_connect(gadget);
171 static struct usb_composite_driver g_dnl_driver = {
174 .strings = g_dnl_composite_strings,
177 .unbind = g_dnl_unbind,
180 int g_dnl_register(const char *type)
182 /* We only allow "dfu" atm, so 3 should be enough */
183 static char name[sizeof(shortname) + 3];
186 if (!strcmp(type, "dfu")) {
187 strcpy(name, shortname);
189 } else if (!strcmp(type, "ums")) {
190 strcpy(name, shortname);
193 printf("%s: unknown command: %s\n", __func__, type);
197 g_dnl_driver.name = name;
199 debug("%s: g_dnl_driver.name: %s\n", __func__, g_dnl_driver.name);
200 ret = usb_composite_register(&g_dnl_driver);
203 printf("%s: failed!, error: %d\n", __func__, ret);
210 void g_dnl_unregister(void)
212 usb_composite_unregister(&g_dnl_driver);