xref: /openbmc/u-boot/drivers/usb/gadget/g_dnl.c (revision 6d2ee5a33a802e6c59ba3148b3a111e4c41d43cb)
1 /*
2  * g_dnl.c -- USB Downloader Gadget
3  *
4  * Copyright (C) 2012 Samsung Electronics
5  * Lukasz Majewski  <l.majewski@samsung.com>
6  *
7  * SPDX-License-Identifier:	GPL-2.0+
8  */
9 
10 #include <errno.h>
11 #include <common.h>
12 #include <malloc.h>
13 
14 #include <mmc.h>
15 #include <part.h>
16 
17 #include <g_dnl.h>
18 #include "f_dfu.h"
19 
20 #include "gadget_chips.h"
21 #include "composite.c"
22 #include "f_mass_storage.c"
23 
24 /*
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
30  */
31 
32 #define STRING_MANUFACTURER 25
33 #define STRING_PRODUCT 2
34 /* Index of String Descriptor describing this configuration */
35 #define STRING_USBDOWN 2
36 /* Number of supported configurations */
37 #define CONFIGURATION_NUMBER 1
38 
39 #define DRIVER_VERSION		"usb_dnl 2.0"
40 
41 static const char shortname[] = "usb_dnl_";
42 static const char product[] = "USB download gadget";
43 static const char manufacturer[] = CONFIG_G_DNL_MANUFACTURER;
44 
45 static struct usb_device_descriptor device_desc = {
46 	.bLength = sizeof device_desc,
47 	.bDescriptorType = USB_DT_DEVICE,
48 
49 	.bcdUSB = __constant_cpu_to_le16(0x0200),
50 	.bDeviceClass = USB_CLASS_COMM,
51 	.bDeviceSubClass = 0x02, /*0x02:CDC-modem , 0x00:CDC-serial*/
52 
53 	.idVendor = __constant_cpu_to_le16(CONFIG_G_DNL_VENDOR_NUM),
54 	.idProduct = __constant_cpu_to_le16(CONFIG_G_DNL_PRODUCT_NUM),
55 	.iProduct = STRING_PRODUCT,
56 	.bNumConfigurations = 1,
57 };
58 
59 /*
60  * static strings, in UTF-8
61  * IDs for those strings are assigned dynamically at g_dnl_bind()
62  */
63 static struct usb_string g_dnl_string_defs[] = {
64 	{.s = manufacturer},
65 	{.s = product},
66 	{ }		/* end of list */
67 };
68 
69 static struct usb_gadget_strings g_dnl_string_tab = {
70 	.language = 0x0409, /* en-us */
71 	.strings = g_dnl_string_defs,
72 };
73 
74 static struct usb_gadget_strings *g_dnl_composite_strings[] = {
75 	&g_dnl_string_tab,
76 	NULL,
77 };
78 
79 static int g_dnl_unbind(struct usb_composite_dev *cdev)
80 {
81 	struct usb_gadget *gadget = cdev->gadget;
82 
83 	debug("%s: calling usb_gadget_disconnect for "
84 			"controller '%s'\n", shortname, gadget->name);
85 	usb_gadget_disconnect(gadget);
86 
87 	return 0;
88 }
89 
90 static int g_dnl_do_config(struct usb_configuration *c)
91 {
92 	const char *s = c->cdev->driver->name;
93 	int ret = -1;
94 
95 	debug("%s: configuration: 0x%p composite dev: 0x%p\n",
96 	      __func__, c, c->cdev);
97 
98 	printf("GADGET DRIVER: %s\n", s);
99 	if (!strcmp(s, "usb_dnl_dfu"))
100 		ret = dfu_add(c);
101 	else if (!strcmp(s, "usb_dnl_ums"))
102 		ret = fsg_add(c);
103 
104 	return ret;
105 }
106 
107 static int g_dnl_config_register(struct usb_composite_dev *cdev)
108 {
109 	static struct usb_configuration config = {
110 		.label = "usb_dnload",
111 		.bmAttributes =	USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
112 		.bConfigurationValue =	CONFIGURATION_NUMBER,
113 		.iConfiguration =	STRING_USBDOWN,
114 
115 		.bind = g_dnl_do_config,
116 	};
117 
118 	return usb_add_config(cdev, &config);
119 }
120 
121 __weak
122 int g_dnl_bind_fixup(struct usb_device_descriptor *dev)
123 {
124 	return 0;
125 }
126 
127 static int g_dnl_bind(struct usb_composite_dev *cdev)
128 {
129 	struct usb_gadget *gadget = cdev->gadget;
130 	int id, ret;
131 	int gcnum;
132 
133 	debug("%s: gadget: 0x%p cdev: 0x%p\n", __func__, gadget, cdev);
134 
135 	id = usb_string_id(cdev);
136 
137 	if (id < 0)
138 		return id;
139 	g_dnl_string_defs[0].id = id;
140 	device_desc.iManufacturer = id;
141 
142 	id = usb_string_id(cdev);
143 	if (id < 0)
144 		return id;
145 
146 	g_dnl_string_defs[1].id = id;
147 	device_desc.iProduct = id;
148 
149 	g_dnl_bind_fixup(&device_desc);
150 	ret = g_dnl_config_register(cdev);
151 	if (ret)
152 		goto error;
153 
154 	gcnum = usb_gadget_controller_number(gadget);
155 
156 	debug("gcnum: %d\n", gcnum);
157 	if (gcnum >= 0)
158 		device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum);
159 	else {
160 		debug("%s: controller '%s' not recognized\n",
161 			shortname, gadget->name);
162 		device_desc.bcdDevice = __constant_cpu_to_le16(0x9999);
163 	}
164 
165 	debug("%s: calling usb_gadget_connect for "
166 			"controller '%s'\n", shortname, gadget->name);
167 	usb_gadget_connect(gadget);
168 
169 	return 0;
170 
171  error:
172 	g_dnl_unbind(cdev);
173 	return -ENOMEM;
174 }
175 
176 static struct usb_composite_driver g_dnl_driver = {
177 	.name = NULL,
178 	.dev = &device_desc,
179 	.strings = g_dnl_composite_strings,
180 
181 	.bind = g_dnl_bind,
182 	.unbind = g_dnl_unbind,
183 };
184 
185 int g_dnl_register(const char *type)
186 {
187 	/* We only allow "dfu" atm, so 3 should be enough */
188 	static char name[sizeof(shortname) + 3];
189 	int ret;
190 
191 	if (!strcmp(type, "dfu")) {
192 		strcpy(name, shortname);
193 		strcat(name, type);
194 	} else if (!strcmp(type, "ums")) {
195 		strcpy(name, shortname);
196 		strcat(name, type);
197 	} else {
198 		printf("%s: unknown command: %s\n", __func__, type);
199 		return -EINVAL;
200 	}
201 
202 	g_dnl_driver.name = name;
203 
204 	debug("%s: g_dnl_driver.name: %s\n", __func__, g_dnl_driver.name);
205 	ret = usb_composite_register(&g_dnl_driver);
206 
207 	if (ret) {
208 		printf("%s: failed!, error: %d\n", __func__, ret);
209 		return ret;
210 	}
211 
212 	return 0;
213 }
214 
215 void g_dnl_unregister(void)
216 {
217 	usb_composite_unregister(&g_dnl_driver);
218 }
219