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1 | /* |
2 | * acm_ms.c -- Composite driver, with ACM and mass storage support | |
3 | * | |
4 | * Copyright (C) 2008 David Brownell | |
5 | * Copyright (C) 2008 Nokia Corporation | |
6 | * Author: David Brownell | |
7 | * Modified: Klaus Schwarzkopf <schwarzkopf@sensortherm.de> | |
8 | * | |
9 | * Heavily based on multi.c and cdc2.c | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | */ | |
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/utsname.h> | |
19 | ||
20 | #include "u_serial.h" | |
21 | ||
22 | #define DRIVER_DESC "Composite Gadget (ACM + MS)" | |
23 | #define DRIVER_VERSION "2011/10/10" | |
24 | ||
25 | /*-------------------------------------------------------------------------*/ | |
26 | ||
27 | /* | |
28 | * DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! | |
29 | * Instead: allocate your own, using normal USB-IF procedures. | |
30 | */ | |
31 | #define ACM_MS_VENDOR_NUM 0x1d6b /* Linux Foundation */ | |
32 | #define ACM_MS_PRODUCT_NUM 0x0106 /* Composite Gadget: ACM + MS*/ | |
33 | ||
34 | /*-------------------------------------------------------------------------*/ | |
35 | ||
36 | /* | |
37 | * Kbuild is not very cooperative with respect to linking separately | |
38 | * compiled library objects into one module. So for now we won't use | |
39 | * separate compilation ... ensuring init/exit sections work to shrink | |
40 | * the runtime footprint, and giving us at least some parts of what | |
41 | * a "gcc --combine ... part1.c part2.c part3.c ... " build would. | |
42 | */ | |
43 | ||
44 | #include "composite.c" | |
45 | #include "usbstring.c" | |
46 | #include "config.c" | |
47 | #include "epautoconf.c" | |
48 | #include "u_serial.c" | |
49 | #include "f_acm.c" | |
50 | #include "f_mass_storage.c" | |
51 | ||
52 | /*-------------------------------------------------------------------------*/ | |
53 | ||
54 | static struct usb_device_descriptor device_desc = { | |
55 | .bLength = sizeof device_desc, | |
56 | .bDescriptorType = USB_DT_DEVICE, | |
57 | ||
58 | .bcdUSB = cpu_to_le16(0x0200), | |
59 | ||
60 | .bDeviceClass = USB_CLASS_MISC /* 0xEF */, | |
61 | .bDeviceSubClass = 2, | |
62 | .bDeviceProtocol = 1, | |
63 | ||
64 | /* .bMaxPacketSize0 = f(hardware) */ | |
65 | ||
66 | /* Vendor and product id can be overridden by module parameters. */ | |
67 | .idVendor = cpu_to_le16(ACM_MS_VENDOR_NUM), | |
68 | .idProduct = cpu_to_le16(ACM_MS_PRODUCT_NUM), | |
69 | /* .bcdDevice = f(hardware) */ | |
70 | /* .iManufacturer = DYNAMIC */ | |
71 | /* .iProduct = DYNAMIC */ | |
72 | /* NO SERIAL NUMBER */ | |
73 | /*.bNumConfigurations = DYNAMIC*/ | |
74 | }; | |
75 | ||
76 | static struct usb_otg_descriptor otg_descriptor = { | |
77 | .bLength = sizeof otg_descriptor, | |
78 | .bDescriptorType = USB_DT_OTG, | |
79 | ||
80 | /* | |
81 | * REVISIT SRP-only hardware is possible, although | |
82 | * it would not be called "OTG" ... | |
83 | */ | |
84 | .bmAttributes = USB_OTG_SRP | USB_OTG_HNP, | |
85 | }; | |
86 | ||
87 | static const struct usb_descriptor_header *otg_desc[] = { | |
88 | (struct usb_descriptor_header *) &otg_descriptor, | |
89 | NULL, | |
90 | }; | |
91 | ||
92 | ||
93 | /* string IDs are assigned dynamically */ | |
94 | ||
95 | #define STRING_MANUFACTURER_IDX 0 | |
96 | #define STRING_PRODUCT_IDX 1 | |
97 | ||
98 | static char manufacturer[50]; | |
99 | ||
100 | static struct usb_string strings_dev[] = { | |
101 | [STRING_MANUFACTURER_IDX].s = manufacturer, | |
102 | [STRING_PRODUCT_IDX].s = DRIVER_DESC, | |
103 | { } /* end of list */ | |
104 | }; | |
105 | ||
106 | static struct usb_gadget_strings stringtab_dev = { | |
107 | .language = 0x0409, /* en-us */ | |
108 | .strings = strings_dev, | |
109 | }; | |
110 | ||
111 | static struct usb_gadget_strings *dev_strings[] = { | |
112 | &stringtab_dev, | |
113 | NULL, | |
114 | }; | |
115 | ||
116 | /****************************** Configurations ******************************/ | |
117 | ||
118 | static struct fsg_module_parameters fsg_mod_data = { .stall = 1 }; | |
119 | FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data); | |
120 | ||
121 | static struct fsg_common fsg_common; | |
122 | ||
123 | /*-------------------------------------------------------------------------*/ | |
124 | ||
125 | /* | |
126 | * We _always_ have both ACM and mass storage functions. | |
127 | */ | |
128 | static int __init acm_ms_do_config(struct usb_configuration *c) | |
129 | { | |
130 | int status; | |
131 | ||
132 | if (gadget_is_otg(c->cdev->gadget)) { | |
133 | c->descriptors = otg_desc; | |
134 | c->bmAttributes |= USB_CONFIG_ATT_WAKEUP; | |
135 | } | |
136 | ||
137 | ||
138 | status = acm_bind_config(c, 0); | |
139 | if (status < 0) | |
140 | return status; | |
141 | ||
142 | status = fsg_bind_config(c->cdev, c, &fsg_common); | |
143 | if (status < 0) | |
144 | return status; | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
149 | static struct usb_configuration acm_ms_config_driver = { | |
150 | .label = DRIVER_DESC, | |
151 | .bConfigurationValue = 1, | |
152 | /* .iConfiguration = DYNAMIC */ | |
153 | .bmAttributes = USB_CONFIG_ATT_SELFPOWER, | |
154 | }; | |
155 | ||
156 | /*-------------------------------------------------------------------------*/ | |
157 | ||
158 | static int __init acm_ms_bind(struct usb_composite_dev *cdev) | |
159 | { | |
160 | int gcnum; | |
161 | struct usb_gadget *gadget = cdev->gadget; | |
162 | int status; | |
163 | void *retp; | |
164 | ||
165 | /* set up serial link layer */ | |
166 | status = gserial_setup(cdev->gadget, 1); | |
167 | if (status < 0) | |
168 | return status; | |
169 | ||
170 | /* set up mass storage function */ | |
171 | retp = fsg_common_from_params(&fsg_common, cdev, &fsg_mod_data); | |
172 | if (IS_ERR(retp)) { | |
173 | status = PTR_ERR(retp); | |
174 | goto fail0; | |
175 | } | |
176 | ||
177 | /* set bcdDevice */ | |
178 | gcnum = usb_gadget_controller_number(gadget); | |
179 | if (gcnum >= 0) { | |
180 | device_desc.bcdDevice = cpu_to_le16(0x0300 | gcnum); | |
181 | } else { | |
182 | WARNING(cdev, "controller '%s' not recognized; trying %s\n", | |
183 | gadget->name, | |
184 | acm_ms_config_driver.label); | |
185 | device_desc.bcdDevice = | |
186 | cpu_to_le16(0x0300 | 0x0099); | |
187 | } | |
188 | ||
189 | /* | |
190 | * Allocate string descriptor numbers ... note that string | |
191 | * contents can be overridden by the composite_dev glue. | |
192 | */ | |
193 | ||
194 | /* device descriptor strings: manufacturer, product */ | |
195 | snprintf(manufacturer, sizeof manufacturer, "%s %s with %s", | |
196 | init_utsname()->sysname, init_utsname()->release, | |
197 | gadget->name); | |
198 | status = usb_string_id(cdev); | |
199 | if (status < 0) | |
200 | goto fail1; | |
201 | strings_dev[STRING_MANUFACTURER_IDX].id = status; | |
202 | device_desc.iManufacturer = status; | |
203 | ||
204 | status = usb_string_id(cdev); | |
205 | if (status < 0) | |
206 | goto fail1; | |
207 | strings_dev[STRING_PRODUCT_IDX].id = status; | |
208 | device_desc.iProduct = status; | |
209 | ||
210 | /* register our configuration */ | |
211 | status = usb_add_config(cdev, &acm_ms_config_driver, acm_ms_do_config); | |
212 | if (status < 0) | |
213 | goto fail1; | |
214 | ||
215 | dev_info(&gadget->dev, "%s, version: " DRIVER_VERSION "\n", | |
216 | DRIVER_DESC); | |
217 | fsg_common_put(&fsg_common); | |
218 | return 0; | |
219 | ||
220 | /* error recovery */ | |
221 | fail1: | |
222 | fsg_common_put(&fsg_common); | |
223 | fail0: | |
224 | gserial_cleanup(); | |
225 | return status; | |
226 | } | |
227 | ||
228 | static int __exit acm_ms_unbind(struct usb_composite_dev *cdev) | |
229 | { | |
230 | gserial_cleanup(); | |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
235 | static struct usb_composite_driver acm_ms_driver = { | |
236 | .name = "g_acm_ms", | |
237 | .dev = &device_desc, | |
238 | .strings = dev_strings, | |
239 | .unbind = __exit_p(acm_ms_unbind), | |
240 | }; | |
241 | ||
242 | MODULE_DESCRIPTION(DRIVER_DESC); | |
243 | MODULE_AUTHOR("Klaus Schwarzkopf <schwarzkopf@sensortherm.de>"); | |
244 | MODULE_LICENSE("GPL v2"); | |
245 | ||
246 | static int __init init(void) | |
247 | { | |
248 | return usb_composite_probe(&acm_ms_driver, acm_ms_bind); | |
249 | } | |
250 | module_init(init); | |
251 | ||
252 | static void __exit cleanup(void) | |
253 | { | |
254 | usb_composite_unregister(&acm_ms_driver); | |
255 | } | |
256 | module_exit(cleanup); |