This source file includes following definitions.
- serial_register_ports
- gs_bind
- gs_unbind
- cleanup
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10 #include <linux/kernel.h>
11 #include <linux/device.h>
12 #include <linux/module.h>
13 #include <linux/tty.h>
14 #include <linux/tty_flip.h>
15
16 #include "u_serial.h"
17
18
19
20
21 #define GS_VERSION_STR "v2.4"
22 #define GS_VERSION_NUM 0x2400
23
24 #define GS_LONG_NAME "Gadget Serial"
25 #define GS_VERSION_NAME GS_LONG_NAME " " GS_VERSION_STR
26
27
28 USB_GADGET_COMPOSITE_OPTIONS();
29
30
31
32
33
34
35 #define GS_VENDOR_ID 0x0525
36 #define GS_PRODUCT_ID 0xa4a6
37 #define GS_CDC_PRODUCT_ID 0xa4a7
38 #define GS_CDC_OBEX_PRODUCT_ID 0xa4a9
39
40
41
42 #define STRING_DESCRIPTION_IDX USB_GADGET_FIRST_AVAIL_IDX
43
44 static struct usb_string strings_dev[] = {
45 [USB_GADGET_MANUFACTURER_IDX].s = "",
46 [USB_GADGET_PRODUCT_IDX].s = GS_VERSION_NAME,
47 [USB_GADGET_SERIAL_IDX].s = "",
48 [STRING_DESCRIPTION_IDX].s = NULL ,
49 { }
50 };
51
52 static struct usb_gadget_strings stringtab_dev = {
53 .language = 0x0409,
54 .strings = strings_dev,
55 };
56
57 static struct usb_gadget_strings *dev_strings[] = {
58 &stringtab_dev,
59 NULL,
60 };
61
62 static struct usb_device_descriptor device_desc = {
63 .bLength = USB_DT_DEVICE_SIZE,
64 .bDescriptorType = USB_DT_DEVICE,
65
66
67 .bDeviceSubClass = 0,
68 .bDeviceProtocol = 0,
69
70 .idVendor = cpu_to_le16(GS_VENDOR_ID),
71
72 .bcdDevice = cpu_to_le16(GS_VERSION_NUM),
73
74
75 .bNumConfigurations = 1,
76 };
77
78 static const struct usb_descriptor_header *otg_desc[2];
79
80
81
82
83 MODULE_DESCRIPTION(GS_VERSION_NAME);
84 MODULE_AUTHOR("Al Borchers");
85 MODULE_AUTHOR("David Brownell");
86 MODULE_LICENSE("GPL");
87
88 static bool use_acm = true;
89 module_param(use_acm, bool, 0);
90 MODULE_PARM_DESC(use_acm, "Use CDC ACM, default=yes");
91
92 static bool use_obex = false;
93 module_param(use_obex, bool, 0);
94 MODULE_PARM_DESC(use_obex, "Use CDC OBEX, default=no");
95
96 static unsigned n_ports = 1;
97 module_param(n_ports, uint, 0);
98 MODULE_PARM_DESC(n_ports, "number of ports to create, default=1");
99
100
101
102 static struct usb_configuration serial_config_driver = {
103
104
105
106 .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
107 };
108
109 static struct usb_function_instance *fi_serial[MAX_U_SERIAL_PORTS];
110 static struct usb_function *f_serial[MAX_U_SERIAL_PORTS];
111
112 static int serial_register_ports(struct usb_composite_dev *cdev,
113 struct usb_configuration *c, const char *f_name)
114 {
115 int i;
116 int ret;
117
118 ret = usb_add_config_only(cdev, c);
119 if (ret)
120 goto out;
121
122 for (i = 0; i < n_ports; i++) {
123
124 fi_serial[i] = usb_get_function_instance(f_name);
125 if (IS_ERR(fi_serial[i])) {
126 ret = PTR_ERR(fi_serial[i]);
127 goto fail;
128 }
129
130 f_serial[i] = usb_get_function(fi_serial[i]);
131 if (IS_ERR(f_serial[i])) {
132 ret = PTR_ERR(f_serial[i]);
133 goto err_get_func;
134 }
135
136 ret = usb_add_function(c, f_serial[i]);
137 if (ret)
138 goto err_add_func;
139 }
140
141 return 0;
142
143 err_add_func:
144 usb_put_function(f_serial[i]);
145 err_get_func:
146 usb_put_function_instance(fi_serial[i]);
147
148 fail:
149 i--;
150 while (i >= 0) {
151 usb_remove_function(c, f_serial[i]);
152 usb_put_function(f_serial[i]);
153 usb_put_function_instance(fi_serial[i]);
154 i--;
155 }
156 out:
157 return ret;
158 }
159
160 static int gs_bind(struct usb_composite_dev *cdev)
161 {
162 int status;
163
164
165
166
167
168 status = usb_string_ids_tab(cdev, strings_dev);
169 if (status < 0)
170 goto fail;
171 device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id;
172 device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
173 status = strings_dev[STRING_DESCRIPTION_IDX].id;
174 serial_config_driver.iConfiguration = status;
175
176 if (gadget_is_otg(cdev->gadget)) {
177 if (!otg_desc[0]) {
178 struct usb_descriptor_header *usb_desc;
179
180 usb_desc = usb_otg_descriptor_alloc(cdev->gadget);
181 if (!usb_desc) {
182 status = -ENOMEM;
183 goto fail;
184 }
185 usb_otg_descriptor_init(cdev->gadget, usb_desc);
186 otg_desc[0] = usb_desc;
187 otg_desc[1] = NULL;
188 }
189 serial_config_driver.descriptors = otg_desc;
190 serial_config_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
191 }
192
193
194 if (use_acm) {
195 status = serial_register_ports(cdev, &serial_config_driver,
196 "acm");
197 usb_ep_autoconfig_reset(cdev->gadget);
198 } else if (use_obex)
199 status = serial_register_ports(cdev, &serial_config_driver,
200 "obex");
201 else {
202 status = serial_register_ports(cdev, &serial_config_driver,
203 "gser");
204 }
205 if (status < 0)
206 goto fail1;
207
208 usb_composite_overwrite_options(cdev, &coverwrite);
209 INFO(cdev, "%s\n", GS_VERSION_NAME);
210
211 return 0;
212 fail1:
213 kfree(otg_desc[0]);
214 otg_desc[0] = NULL;
215 fail:
216 return status;
217 }
218
219 static int gs_unbind(struct usb_composite_dev *cdev)
220 {
221 int i;
222
223 for (i = 0; i < n_ports; i++) {
224 usb_put_function(f_serial[i]);
225 usb_put_function_instance(fi_serial[i]);
226 }
227
228 kfree(otg_desc[0]);
229 otg_desc[0] = NULL;
230
231 return 0;
232 }
233
234 static struct usb_composite_driver gserial_driver = {
235 .name = "g_serial",
236 .dev = &device_desc,
237 .strings = dev_strings,
238 .max_speed = USB_SPEED_SUPER,
239 .bind = gs_bind,
240 .unbind = gs_unbind,
241 };
242
243 static int __init init(void)
244 {
245
246
247
248 if (use_acm) {
249 serial_config_driver.label = "CDC ACM config";
250 serial_config_driver.bConfigurationValue = 2;
251 device_desc.bDeviceClass = USB_CLASS_COMM;
252 device_desc.idProduct =
253 cpu_to_le16(GS_CDC_PRODUCT_ID);
254 } else if (use_obex) {
255 serial_config_driver.label = "CDC OBEX config";
256 serial_config_driver.bConfigurationValue = 3;
257 device_desc.bDeviceClass = USB_CLASS_COMM;
258 device_desc.idProduct =
259 cpu_to_le16(GS_CDC_OBEX_PRODUCT_ID);
260 } else {
261 serial_config_driver.label = "Generic Serial config";
262 serial_config_driver.bConfigurationValue = 1;
263 device_desc.bDeviceClass = USB_CLASS_VENDOR_SPEC;
264 device_desc.idProduct =
265 cpu_to_le16(GS_PRODUCT_ID);
266 }
267 strings_dev[STRING_DESCRIPTION_IDX].s = serial_config_driver.label;
268
269 return usb_composite_probe(&gserial_driver);
270 }
271 module_init(init);
272
273 static void __exit cleanup(void)
274 {
275 usb_composite_unregister(&gserial_driver);
276 }
277 module_exit(cleanup);