Merge branch 'master' of git://git.denx.de/u-boot-usb
[oweals/u-boot.git] / drivers / usb / gadget / g_dnl.c
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 <common.h>
11 #include <malloc.h>
12
13 #include <mmc.h>
14 #include <part.h>
15 #include <usb.h>
16
17 #include <g_dnl.h>
18 #include <usb_mass_storage.h>
19 #include <dfu.h>
20 #include <thor.h>
21
22 #include "gadget_chips.h"
23 #include "composite.c"
24
25 /*
26  * One needs to define the following:
27  * CONFIG_G_DNL_VENDOR_NUM
28  * CONFIG_G_DNL_PRODUCT_NUM
29  * CONFIG_G_DNL_MANUFACTURER
30  * at e.g. ./configs/<board>_defconfig
31  */
32
33 #define STRING_MANUFACTURER 25
34 #define STRING_PRODUCT 2
35 /* Index of String Descriptor describing this configuration */
36 #define STRING_USBDOWN 2
37 /* Index of String serial */
38 #define STRING_SERIAL  3
39 #define MAX_STRING_SERIAL       256
40 /* Number of supported configurations */
41 #define CONFIGURATION_NUMBER 1
42
43 #define DRIVER_VERSION          "usb_dnl 2.0"
44
45 static const char product[] = "USB download gadget";
46 static char g_dnl_serial[MAX_STRING_SERIAL];
47 static const char manufacturer[] = CONFIG_G_DNL_MANUFACTURER;
48
49 void g_dnl_set_serialnumber(char *s)
50 {
51         memset(g_dnl_serial, 0, MAX_STRING_SERIAL);
52         strncpy(g_dnl_serial, s, MAX_STRING_SERIAL - 1);
53 }
54
55 static struct usb_device_descriptor device_desc = {
56         .bLength = sizeof device_desc,
57         .bDescriptorType = USB_DT_DEVICE,
58
59         .bcdUSB = __constant_cpu_to_le16(0x0200),
60         .bDeviceClass = USB_CLASS_PER_INTERFACE,
61         .bDeviceSubClass = 0, /*0x02:CDC-modem , 0x00:CDC-serial*/
62
63         .idVendor = __constant_cpu_to_le16(CONFIG_G_DNL_VENDOR_NUM),
64         .idProduct = __constant_cpu_to_le16(CONFIG_G_DNL_PRODUCT_NUM),
65         /* .iProduct = DYNAMIC */
66         /* .iSerialNumber = DYNAMIC */
67         .bNumConfigurations = 1,
68 };
69
70 /*
71  * static strings, in UTF-8
72  * IDs for those strings are assigned dynamically at g_dnl_bind()
73  */
74 static struct usb_string g_dnl_string_defs[] = {
75         {.s = manufacturer},
76         {.s = product},
77         {.s = g_dnl_serial},
78         { }             /* end of list */
79 };
80
81 static struct usb_gadget_strings g_dnl_string_tab = {
82         .language = 0x0409, /* en-us */
83         .strings = g_dnl_string_defs,
84 };
85
86 static struct usb_gadget_strings *g_dnl_composite_strings[] = {
87         &g_dnl_string_tab,
88         NULL,
89 };
90
91 static int g_dnl_unbind(struct usb_composite_dev *cdev)
92 {
93         struct usb_gadget *gadget = cdev->gadget;
94
95         debug("%s: calling usb_gadget_disconnect for "
96                         "controller '%s'\n", __func__, gadget->name);
97         usb_gadget_disconnect(gadget);
98
99         return 0;
100 }
101
102 static inline struct g_dnl_bind_callback *g_dnl_bind_callback_first(void)
103 {
104         return ll_entry_start(struct g_dnl_bind_callback,
105                                 g_dnl_bind_callbacks);
106 }
107
108 static inline struct g_dnl_bind_callback *g_dnl_bind_callback_end(void)
109 {
110         return ll_entry_end(struct g_dnl_bind_callback,
111                                 g_dnl_bind_callbacks);
112 }
113
114 static int g_dnl_do_config(struct usb_configuration *c)
115 {
116         const char *s = c->cdev->driver->name;
117         struct g_dnl_bind_callback *callback = g_dnl_bind_callback_first();
118
119         debug("%s: configuration: 0x%p composite dev: 0x%p\n",
120               __func__, c, c->cdev);
121
122         for (; callback != g_dnl_bind_callback_end(); callback++)
123                 if (!strcmp(s, callback->usb_function_name))
124                         return callback->fptr(c);
125         return -ENODEV;
126 }
127
128 static int g_dnl_config_register(struct usb_composite_dev *cdev)
129 {
130         struct usb_configuration *config;
131         const char *name = "usb_dnload";
132
133         config = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*config));
134         if (!config)
135                 return -ENOMEM;
136
137         memset(config, 0, sizeof(*config));
138
139         config->label = name;
140         config->bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER;
141         config->bConfigurationValue = CONFIGURATION_NUMBER;
142         config->iConfiguration = STRING_USBDOWN;
143         config->bind = g_dnl_do_config;
144
145         return usb_add_config(cdev, config);
146 }
147
148 __weak
149 int board_usb_init(int index, enum usb_init_type init)
150 {
151         return 0;
152 }
153
154 __weak
155 int board_usb_cleanup(int index, enum usb_init_type init)
156 {
157         return 0;
158 }
159
160 __weak
161 int g_dnl_bind_fixup(struct usb_device_descriptor *dev, const char *name)
162 {
163         return 0;
164 }
165
166 __weak int g_dnl_get_board_bcd_device_number(int gcnum)
167 {
168         return gcnum;
169 }
170
171 __weak int g_dnl_board_usb_cable_connected(void)
172 {
173         return -EOPNOTSUPP;
174 }
175
176 static bool g_dnl_detach_request;
177
178 bool g_dnl_detach(void)
179 {
180         return g_dnl_detach_request;
181 }
182
183 void g_dnl_trigger_detach(void)
184 {
185         g_dnl_detach_request = true;
186 }
187
188 void g_dnl_clear_detach(void)
189 {
190         g_dnl_detach_request = false;
191 }
192
193 static int g_dnl_get_bcd_device_number(struct usb_composite_dev *cdev)
194 {
195         struct usb_gadget *gadget = cdev->gadget;
196         int gcnum;
197
198         gcnum = usb_gadget_controller_number(gadget);
199         if (gcnum > 0)
200                 gcnum += 0x200;
201
202         return g_dnl_get_board_bcd_device_number(gcnum);
203 }
204
205 static int g_dnl_bind(struct usb_composite_dev *cdev)
206 {
207         struct usb_gadget *gadget = cdev->gadget;
208         int id, ret;
209         int gcnum;
210
211         debug("%s: gadget: 0x%p cdev: 0x%p\n", __func__, gadget, cdev);
212
213         id = usb_string_id(cdev);
214
215         if (id < 0)
216                 return id;
217         g_dnl_string_defs[0].id = id;
218         device_desc.iManufacturer = id;
219
220         id = usb_string_id(cdev);
221         if (id < 0)
222                 return id;
223
224         g_dnl_string_defs[1].id = id;
225         device_desc.iProduct = id;
226
227         if (strlen(g_dnl_serial)) {
228                 id = usb_string_id(cdev);
229                 if (id < 0)
230                         return id;
231
232                 g_dnl_string_defs[2].id = id;
233                 device_desc.iSerialNumber = id;
234         }
235
236         g_dnl_bind_fixup(&device_desc, cdev->driver->name);
237         ret = g_dnl_config_register(cdev);
238         if (ret)
239                 goto error;
240
241         gcnum = g_dnl_get_bcd_device_number(cdev);
242         if (gcnum >= 0)
243                 device_desc.bcdDevice = cpu_to_le16(gcnum);
244         else {
245                 debug("%s: controller '%s' not recognized\n",
246                         __func__, gadget->name);
247                 device_desc.bcdDevice = __constant_cpu_to_le16(0x9999);
248         }
249
250         debug("%s: calling usb_gadget_connect for "
251                         "controller '%s'\n", __func__, gadget->name);
252         usb_gadget_connect(gadget);
253
254         return 0;
255
256  error:
257         g_dnl_unbind(cdev);
258         return -ENOMEM;
259 }
260
261 static struct usb_composite_driver g_dnl_driver = {
262         .name = NULL,
263         .dev = &device_desc,
264         .strings = g_dnl_composite_strings,
265
266         .bind = g_dnl_bind,
267         .unbind = g_dnl_unbind,
268 };
269
270 /*
271  * NOTICE:
272  * Registering via USB function name won't be necessary after rewriting
273  * g_dnl to support multiple USB functions.
274  */
275 int g_dnl_register(const char *name)
276 {
277         int ret;
278
279         debug("%s: g_dnl_driver.name = %s\n", __func__, name);
280         g_dnl_driver.name = name;
281
282         ret = usb_composite_register(&g_dnl_driver);
283         if (ret) {
284                 printf("%s: failed!, error: %d\n", __func__, ret);
285                 return ret;
286         }
287         return 0;
288 }
289
290 void g_dnl_unregister(void)
291 {
292         usb_composite_unregister(&g_dnl_driver);
293 }