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+
17 #include <usb_mass_storage.h>
20 #include "gadget_chips.h"
21 #include "composite.c"
24 * One needs to define the following:
25 * CONFIG_G_DNL_VENDOR_NUM
26 * CONFIG_G_DNL_PRODUCT_NUM
27 * CONFIG_G_DNL_MANUFACTURER
28 * at e.g. ./include/configs/<board>.h
31 #define STRING_MANUFACTURER 25
32 #define STRING_PRODUCT 2
33 /* Index of String Descriptor describing this configuration */
34 #define STRING_USBDOWN 2
35 /* Number of supported configurations */
36 #define CONFIGURATION_NUMBER 1
38 #define DRIVER_VERSION "usb_dnl 2.0"
40 static const char shortname[] = "usb_dnl_";
41 static const char product[] = "USB download gadget";
42 static const char manufacturer[] = CONFIG_G_DNL_MANUFACTURER;
44 static struct usb_device_descriptor device_desc = {
45 .bLength = sizeof device_desc,
46 .bDescriptorType = USB_DT_DEVICE,
48 .bcdUSB = __constant_cpu_to_le16(0x0200),
49 .bDeviceClass = USB_CLASS_COMM,
50 .bDeviceSubClass = 0x02, /*0x02:CDC-modem , 0x00:CDC-serial*/
52 .idVendor = __constant_cpu_to_le16(CONFIG_G_DNL_VENDOR_NUM),
53 .idProduct = __constant_cpu_to_le16(CONFIG_G_DNL_PRODUCT_NUM),
54 .iProduct = STRING_PRODUCT,
55 .bNumConfigurations = 1,
59 * static strings, in UTF-8
60 * IDs for those strings are assigned dynamically at g_dnl_bind()
62 static struct usb_string g_dnl_string_defs[] = {
68 static struct usb_gadget_strings g_dnl_string_tab = {
69 .language = 0x0409, /* en-us */
70 .strings = g_dnl_string_defs,
73 static struct usb_gadget_strings *g_dnl_composite_strings[] = {
78 static int g_dnl_unbind(struct usb_composite_dev *cdev)
80 struct usb_gadget *gadget = cdev->gadget;
82 debug("%s: calling usb_gadget_disconnect for "
83 "controller '%s'\n", shortname, gadget->name);
84 usb_gadget_disconnect(gadget);
89 static int g_dnl_do_config(struct usb_configuration *c)
91 const char *s = c->cdev->driver->name;
94 debug("%s: configuration: 0x%p composite dev: 0x%p\n",
95 __func__, c, c->cdev);
97 printf("GADGET DRIVER: %s\n", s);
98 if (!strcmp(s, "usb_dnl_dfu"))
100 else if (!strcmp(s, "usb_dnl_ums"))
106 static int g_dnl_config_register(struct usb_composite_dev *cdev)
108 static struct usb_configuration config = {
109 .label = "usb_dnload",
110 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
111 .bConfigurationValue = CONFIGURATION_NUMBER,
112 .iConfiguration = STRING_USBDOWN,
114 .bind = g_dnl_do_config,
117 return usb_add_config(cdev, &config);
121 int g_dnl_bind_fixup(struct usb_device_descriptor *dev)
126 static int g_dnl_bind(struct usb_composite_dev *cdev)
128 struct usb_gadget *gadget = cdev->gadget;
132 debug("%s: gadget: 0x%p cdev: 0x%p\n", __func__, gadget, cdev);
134 id = usb_string_id(cdev);
138 g_dnl_string_defs[0].id = id;
139 device_desc.iManufacturer = id;
141 id = usb_string_id(cdev);
145 g_dnl_string_defs[1].id = id;
146 device_desc.iProduct = id;
148 g_dnl_bind_fixup(&device_desc);
149 ret = g_dnl_config_register(cdev);
153 gcnum = usb_gadget_controller_number(gadget);
155 debug("gcnum: %d\n", gcnum);
157 device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum);
159 debug("%s: controller '%s' not recognized\n",
160 shortname, gadget->name);
161 device_desc.bcdDevice = __constant_cpu_to_le16(0x9999);
164 debug("%s: calling usb_gadget_connect for "
165 "controller '%s'\n", shortname, gadget->name);
166 usb_gadget_connect(gadget);
175 static struct usb_composite_driver g_dnl_driver = {
178 .strings = g_dnl_composite_strings,
181 .unbind = g_dnl_unbind,
184 int g_dnl_register(const char *type)
186 /* We only allow "dfu" atm, so 3 should be enough */
187 static char name[sizeof(shortname) + 3];
190 if (!strcmp(type, "dfu")) {
191 strcpy(name, shortname);
193 } else if (!strcmp(type, "ums")) {
194 strcpy(name, shortname);
197 printf("%s: unknown command: %s\n", __func__, type);
201 g_dnl_driver.name = name;
203 debug("%s: g_dnl_driver.name: %s\n", __func__, g_dnl_driver.name);
204 ret = usb_composite_register(&g_dnl_driver);
207 printf("%s: failed!, error: %d\n", __func__, ret);
214 void g_dnl_unregister(void)
216 usb_composite_unregister(&g_dnl_driver);