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Commit | Line | Data |
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1da177e4 | 1 | /* |
a7707adf | 2 | * serial.c -- USB gadget serial driver |
1da177e4 | 3 | * |
a7707adf DB |
4 | * Copyright (C) 2003 Al Borchers (alborchers@steinerpoint.com) |
5 | * Copyright (C) 2008 by David Brownell | |
7bb5ea54 | 6 | * Copyright (C) 2008 by Nokia Corporation |
1da177e4 LT |
7 | * |
8 | * This software is distributed under the terms of the GNU General | |
9 | * Public License ("GPL") as published by the Free Software Foundation, | |
10 | * either version 2 of that License or (at your option) any later version. | |
1da177e4 LT |
11 | */ |
12 | ||
1da177e4 | 13 | #include <linux/kernel.h> |
1da177e4 | 14 | #include <linux/utsname.h> |
1da177e4 LT |
15 | #include <linux/device.h> |
16 | #include <linux/tty.h> | |
17 | #include <linux/tty_flip.h> | |
1da177e4 | 18 | |
a7707adf | 19 | #include "u_serial.h" |
1da177e4 LT |
20 | #include "gadget_chips.h" |
21 | ||
22 | ||
1da177e4 LT |
23 | /* Defines */ |
24 | ||
7bb5ea54 DB |
25 | #define GS_VERSION_STR "v2.4" |
26 | #define GS_VERSION_NUM 0x2400 | |
1da177e4 LT |
27 | |
28 | #define GS_LONG_NAME "Gadget Serial" | |
a7707adf DB |
29 | #define GS_VERSION_NAME GS_LONG_NAME " " GS_VERSION_STR |
30 | ||
7bb5ea54 | 31 | /*-------------------------------------------------------------------------*/ |
1da177e4 | 32 | |
4e9ba518 DB |
33 | /* |
34 | * Kbuild is not very cooperative with respect to linking separately | |
35 | * compiled library objects into one module. So for now we won't use | |
36 | * separate compilation ... ensuring init/exit sections work to shrink | |
37 | * the runtime footprint, and giving us at least some parts of what | |
38 | * a "gcc --combine ... part1.c part2.c part3.c ... " build would. | |
39 | */ | |
40 | #include "composite.c" | |
41 | #include "usbstring.c" | |
42 | #include "config.c" | |
43 | #include "epautoconf.c" | |
44 | ||
45 | #include "f_acm.c" | |
3086775a | 46 | #include "f_obex.c" |
4e9ba518 DB |
47 | #include "f_serial.c" |
48 | #include "u_serial.c" | |
49 | ||
50 | /*-------------------------------------------------------------------------*/ | |
51 | ||
1da177e4 | 52 | /* Thanks to NetChip Technologies for donating this product ID. |
7bb5ea54 DB |
53 | * |
54 | * DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! | |
55 | * Instead: allocate your own, using normal USB-IF procedures. | |
56 | */ | |
1da177e4 LT |
57 | #define GS_VENDOR_ID 0x0525 /* NetChip */ |
58 | #define GS_PRODUCT_ID 0xa4a6 /* Linux-USB Serial Gadget */ | |
59 | #define GS_CDC_PRODUCT_ID 0xa4a7 /* ... as CDC-ACM */ | |
3086775a | 60 | #define GS_CDC_OBEX_PRODUCT_ID 0xa4a9 /* ... as CDC-OBEX */ |
1da177e4 | 61 | |
7bb5ea54 | 62 | /* string IDs are assigned dynamically */ |
1da177e4 | 63 | |
7bb5ea54 DB |
64 | #define STRING_MANUFACTURER_IDX 0 |
65 | #define STRING_PRODUCT_IDX 1 | |
66 | #define STRING_DESCRIPTION_IDX 2 | |
a7707adf | 67 | |
1da177e4 | 68 | static char manufacturer[50]; |
7bb5ea54 DB |
69 | |
70 | static struct usb_string strings_dev[] = { | |
71 | [STRING_MANUFACTURER_IDX].s = manufacturer, | |
72 | [STRING_PRODUCT_IDX].s = GS_VERSION_NAME, | |
73 | [STRING_DESCRIPTION_IDX].s = NULL /* updated; f(use_acm) */, | |
1da177e4 LT |
74 | { } /* end of list */ |
75 | }; | |
76 | ||
7bb5ea54 DB |
77 | static struct usb_gadget_strings stringtab_dev = { |
78 | .language = 0x0409, /* en-us */ | |
79 | .strings = strings_dev, | |
1da177e4 LT |
80 | }; |
81 | ||
7bb5ea54 DB |
82 | static struct usb_gadget_strings *dev_strings[] = { |
83 | &stringtab_dev, | |
84 | NULL, | |
85 | }; | |
86 | ||
87 | static struct usb_device_descriptor device_desc = { | |
1da177e4 LT |
88 | .bLength = USB_DT_DEVICE_SIZE, |
89 | .bDescriptorType = USB_DT_DEVICE, | |
90 | .bcdUSB = __constant_cpu_to_le16(0x0200), | |
7bb5ea54 | 91 | /* .bDeviceClass = f(use_acm) */ |
1da177e4 LT |
92 | .bDeviceSubClass = 0, |
93 | .bDeviceProtocol = 0, | |
7bb5ea54 | 94 | /* .bMaxPacketSize0 = f(hardware) */ |
1da177e4 | 95 | .idVendor = __constant_cpu_to_le16(GS_VENDOR_ID), |
7bb5ea54 DB |
96 | /* .idProduct = f(use_acm) */ |
97 | /* .bcdDevice = f(hardware) */ | |
98 | /* .iManufacturer = DYNAMIC */ | |
99 | /* .iProduct = DYNAMIC */ | |
100 | .bNumConfigurations = 1, | |
1da177e4 LT |
101 | }; |
102 | ||
7bb5ea54 DB |
103 | static struct usb_otg_descriptor otg_descriptor = { |
104 | .bLength = sizeof otg_descriptor, | |
1da177e4 | 105 | .bDescriptorType = USB_DT_OTG, |
1da177e4 | 106 | |
7bb5ea54 DB |
107 | /* REVISIT SRP-only hardware is possible, although |
108 | * it would not be called "OTG" ... | |
109 | */ | |
110 | .bmAttributes = USB_OTG_SRP | USB_OTG_HNP, | |
a7707adf DB |
111 | }; |
112 | ||
7bb5ea54 DB |
113 | static const struct usb_descriptor_header *otg_desc[] = { |
114 | (struct usb_descriptor_header *) &otg_descriptor, | |
a7707adf DB |
115 | NULL, |
116 | }; | |
1da177e4 | 117 | |
a7707adf | 118 | /*-------------------------------------------------------------------------*/ |
1da177e4 | 119 | |
a7707adf DB |
120 | /* Module */ |
121 | MODULE_DESCRIPTION(GS_VERSION_NAME); | |
122 | MODULE_AUTHOR("Al Borchers"); | |
123 | MODULE_AUTHOR("David Brownell"); | |
124 | MODULE_LICENSE("GPL"); | |
1da177e4 | 125 | |
7bb5ea54 DB |
126 | static int use_acm = true; |
127 | module_param(use_acm, bool, 0); | |
128 | MODULE_PARM_DESC(use_acm, "Use CDC ACM, default=yes"); | |
1da177e4 | 129 | |
3086775a FB |
130 | static int use_obex = false; |
131 | module_param(use_obex, bool, 0); | |
132 | MODULE_PARM_DESC(use_obex, "Use CDC OBEX, default=no"); | |
133 | ||
7bb5ea54 DB |
134 | static unsigned n_ports = 1; |
135 | module_param(n_ports, uint, 0); | |
136 | MODULE_PARM_DESC(n_ports, "number of ports to create, default=1"); | |
9079e91b | 137 | |
7bb5ea54 | 138 | /*-------------------------------------------------------------------------*/ |
1da177e4 | 139 | |
7bb5ea54 | 140 | static int __init serial_bind_config(struct usb_configuration *c) |
9079e91b | 141 | { |
7bb5ea54 DB |
142 | unsigned i; |
143 | int status = 0; | |
9079e91b | 144 | |
7bb5ea54 DB |
145 | for (i = 0; i < n_ports && status == 0; i++) { |
146 | if (use_acm) | |
147 | status = acm_bind_config(c, i); | |
3086775a FB |
148 | else if (use_obex) |
149 | status = obex_bind_config(c, i); | |
7bb5ea54 DB |
150 | else |
151 | status = gser_bind_config(c, i); | |
9079e91b | 152 | } |
7bb5ea54 | 153 | return status; |
9079e91b DB |
154 | } |
155 | ||
7bb5ea54 DB |
156 | static struct usb_configuration serial_config_driver = { |
157 | /* .label = f(use_acm) */ | |
158 | .bind = serial_bind_config, | |
159 | /* .bConfigurationValue = f(use_acm) */ | |
160 | /* .iConfiguration = DYNAMIC */ | |
161 | .bmAttributes = USB_CONFIG_ATT_SELFPOWER, | |
162 | .bMaxPower = 1, /* 2 mA, minimal */ | |
163 | }; | |
164 | ||
165 | static int __init gs_bind(struct usb_composite_dev *cdev) | |
1da177e4 | 166 | { |
7bb5ea54 DB |
167 | int gcnum; |
168 | struct usb_gadget *gadget = cdev->gadget; | |
169 | int status; | |
1da177e4 | 170 | |
7bb5ea54 DB |
171 | status = gserial_setup(cdev->gadget, n_ports); |
172 | if (status < 0) | |
173 | return status; | |
a7707adf | 174 | |
7bb5ea54 DB |
175 | /* Allocate string descriptor numbers ... note that string |
176 | * contents can be overridden by the composite_dev glue. | |
91e79c91 | 177 | */ |
1da177e4 | 178 | |
7bb5ea54 DB |
179 | /* device description: manufacturer, product */ |
180 | snprintf(manufacturer, sizeof manufacturer, "%s %s with %s", | |
96b644bd | 181 | init_utsname()->sysname, init_utsname()->release, |
1da177e4 | 182 | gadget->name); |
7bb5ea54 DB |
183 | status = usb_string_id(cdev); |
184 | if (status < 0) | |
185 | goto fail; | |
186 | strings_dev[STRING_MANUFACTURER_IDX].id = status; | |
1da177e4 | 187 | |
7bb5ea54 | 188 | device_desc.iManufacturer = status; |
1da177e4 | 189 | |
7bb5ea54 DB |
190 | status = usb_string_id(cdev); |
191 | if (status < 0) | |
192 | goto fail; | |
193 | strings_dev[STRING_PRODUCT_IDX].id = status; | |
1da177e4 | 194 | |
7bb5ea54 | 195 | device_desc.iProduct = status; |
1da177e4 | 196 | |
7bb5ea54 DB |
197 | /* config description */ |
198 | status = usb_string_id(cdev); | |
199 | if (status < 0) | |
200 | goto fail; | |
201 | strings_dev[STRING_DESCRIPTION_IDX].id = status; | |
1da177e4 | 202 | |
7bb5ea54 | 203 | serial_config_driver.iConfiguration = status; |
1da177e4 | 204 | |
7bb5ea54 DB |
205 | /* set up other descriptors */ |
206 | gcnum = usb_gadget_controller_number(gadget); | |
207 | if (gcnum >= 0) | |
208 | device_desc.bcdDevice = cpu_to_le16(GS_VERSION_NUM | gcnum); | |
209 | else { | |
210 | /* this is so simple (for now, no altsettings) that it | |
211 | * SHOULD NOT have problems with bulk-capable hardware. | |
212 | * so warn about unrcognized controllers -- don't panic. | |
213 | * | |
214 | * things like configuration and altsetting numbering | |
215 | * can need hardware-specific attention though. | |
f371e750 | 216 | */ |
7bb5ea54 DB |
217 | pr_warning("gs_bind: controller '%s' not recognized\n", |
218 | gadget->name); | |
219 | device_desc.bcdDevice = | |
220 | __constant_cpu_to_le16(GS_VERSION_NUM | 0x0099); | |
f371e750 | 221 | } |
f371e750 | 222 | |
7bb5ea54 DB |
223 | if (gadget_is_otg(cdev->gadget)) { |
224 | serial_config_driver.descriptors = otg_desc; | |
225 | serial_config_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP; | |
1da177e4 | 226 | } |
9079e91b | 227 | |
7bb5ea54 DB |
228 | /* register our configuration */ |
229 | status = usb_add_config(cdev, &serial_config_driver); | |
230 | if (status < 0) | |
231 | goto fail; | |
1da177e4 | 232 | |
7bb5ea54 | 233 | INFO(cdev, "%s\n", GS_VERSION_NAME); |
1da177e4 | 234 | |
7bb5ea54 | 235 | return 0; |
1da177e4 | 236 | |
7bb5ea54 DB |
237 | fail: |
238 | gserial_cleanup(); | |
239 | return status; | |
1da177e4 LT |
240 | } |
241 | ||
7bb5ea54 DB |
242 | static struct usb_composite_driver gserial_driver = { |
243 | .name = "g_serial", | |
244 | .dev = &device_desc, | |
245 | .strings = dev_strings, | |
246 | .bind = gs_bind, | |
9079e91b DB |
247 | }; |
248 | ||
7bb5ea54 | 249 | static int __init init(void) |
1da177e4 | 250 | { |
7bb5ea54 DB |
251 | /* We *could* export two configs; that'd be much cleaner... |
252 | * but neither of these product IDs was defined that way. | |
f371e750 | 253 | */ |
1da177e4 | 254 | if (use_acm) { |
7bb5ea54 DB |
255 | serial_config_driver.label = "CDC ACM config"; |
256 | serial_config_driver.bConfigurationValue = 2; | |
257 | device_desc.bDeviceClass = USB_CLASS_COMM; | |
258 | device_desc.idProduct = | |
259 | __constant_cpu_to_le16(GS_CDC_PRODUCT_ID); | |
3086775a FB |
260 | } else if (use_obex) { |
261 | serial_config_driver.label = "CDC OBEX config"; | |
262 | serial_config_driver.bConfigurationValue = 3; | |
263 | device_desc.bDeviceClass = USB_CLASS_COMM; | |
264 | device_desc.idProduct = | |
265 | __constant_cpu_to_le16(GS_CDC_OBEX_PRODUCT_ID); | |
1da177e4 | 266 | } else { |
7bb5ea54 DB |
267 | serial_config_driver.label = "Generic Serial config"; |
268 | serial_config_driver.bConfigurationValue = 1; | |
269 | device_desc.bDeviceClass = USB_CLASS_VENDOR_SPEC; | |
270 | device_desc.idProduct = | |
271 | __constant_cpu_to_le16(GS_PRODUCT_ID); | |
1da177e4 | 272 | } |
7bb5ea54 | 273 | strings_dev[STRING_DESCRIPTION_IDX].s = serial_config_driver.label; |
9079e91b | 274 | |
7bb5ea54 | 275 | return usb_composite_register(&gserial_driver); |
9079e91b | 276 | } |
7bb5ea54 | 277 | module_init(init); |
9079e91b | 278 | |
7bb5ea54 | 279 | static void __exit cleanup(void) |
9079e91b | 280 | { |
7bb5ea54 DB |
281 | usb_composite_unregister(&gserial_driver); |
282 | gserial_cleanup(); | |
9079e91b | 283 | } |
7bb5ea54 | 284 | module_exit(cleanup); |