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c6c56008 MN |
1 | #include <linux/module.h> |
2 | #include <linux/utsname.h> | |
3 | ||
4 | ||
5 | /* | |
6 | * kbuild is not very cooperative with respect to linking separately | |
7 | * compiled library objects into one module. So for now we won't use | |
8 | * separate compilation ... ensuring init/exit sections work to shrink | |
9 | * the runtime footprint, and giving us at least some parts of what | |
10 | * a "gcc --combine ... part1.c part2.c part3.c ... " build would. | |
11 | */ | |
12 | ||
13 | #include "composite.c" | |
14 | #include "usbstring.c" | |
15 | #include "config.c" | |
16 | #include "epautoconf.c" | |
17 | ||
18 | #if defined CONFIG_USB_FUNCTIONFS_ETH || defined CONFIG_USB_FUNCTIONFS_RNDIS | |
19 | # if defined USB_ETH_RNDIS | |
20 | # undef USB_ETH_RNDIS | |
21 | # endif | |
22 | # ifdef CONFIG_USB_FUNCTIONFS_RNDIS | |
23 | # define USB_ETH_RNDIS y | |
24 | # endif | |
25 | ||
26 | # include "f_ecm.c" | |
27 | # include "f_subset.c" | |
28 | # ifdef USB_ETH_RNDIS | |
29 | # include "f_rndis.c" | |
30 | # include "rndis.c" | |
31 | # endif | |
32 | # include "u_ether.c" | |
33 | ||
34 | static u8 gfs_hostaddr[ETH_ALEN]; | |
f8dae531 MN |
35 | # ifdef CONFIG_USB_FUNCTIONFS_ETH |
36 | static int eth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]); | |
c6c56008 | 37 | # endif |
f8dae531 | 38 | #else |
c6c56008 MN |
39 | # define gether_cleanup() do { } while (0) |
40 | # define gether_setup(gadget, hostaddr) ((int)0) | |
f8dae531 | 41 | # define gfs_hostaddr NULL |
c6c56008 MN |
42 | #endif |
43 | ||
44 | #include "f_fs.c" | |
45 | ||
46 | ||
47 | #define DRIVER_NAME "g_ffs" | |
48 | #define DRIVER_DESC "USB Function Filesystem" | |
49 | #define DRIVER_VERSION "24 Aug 2004" | |
50 | ||
51 | MODULE_DESCRIPTION(DRIVER_DESC); | |
52 | MODULE_AUTHOR("Michal Nazarewicz"); | |
53 | MODULE_LICENSE("GPL"); | |
54 | ||
fc19de61 MN |
55 | #define GFS_VENDOR_ID 0x1d6b /* Linux Foundation */ |
56 | #define GFS_PRODUCT_ID 0x0105 /* FunctionFS Gadget */ | |
c6c56008 MN |
57 | |
58 | static struct usb_device_descriptor gfs_dev_desc = { | |
59 | .bLength = sizeof gfs_dev_desc, | |
60 | .bDescriptorType = USB_DT_DEVICE, | |
61 | ||
62 | .bcdUSB = cpu_to_le16(0x0200), | |
63 | .bDeviceClass = USB_CLASS_PER_INTERFACE, | |
64 | ||
fc19de61 MN |
65 | .idVendor = cpu_to_le16(GFS_VENDOR_ID), |
66 | .idProduct = cpu_to_le16(GFS_PRODUCT_ID), | |
c6c56008 MN |
67 | }; |
68 | ||
fc19de61 MN |
69 | module_param_named(bDeviceClass, gfs_dev_desc.bDeviceClass, byte, 0644); |
70 | MODULE_PARM_DESC(bDeviceClass, "USB Device class"); | |
71 | module_param_named(bDeviceSubClass, gfs_dev_desc.bDeviceSubClass, byte, 0644); | |
72 | MODULE_PARM_DESC(bDeviceSubClass, "USB Device subclass"); | |
73 | module_param_named(bDeviceProtocol, gfs_dev_desc.bDeviceProtocol, byte, 0644); | |
74 | MODULE_PARM_DESC(bDeviceProtocol, "USB Device protocol"); | |
c6c56008 MN |
75 | |
76 | ||
77 | ||
78 | static const struct usb_descriptor_header *gfs_otg_desc[] = { | |
79 | (const struct usb_descriptor_header *) | |
80 | &(const struct usb_otg_descriptor) { | |
81 | .bLength = sizeof(struct usb_otg_descriptor), | |
82 | .bDescriptorType = USB_DT_OTG, | |
83 | ||
fc19de61 MN |
84 | /* |
85 | * REVISIT SRP-only hardware is possible, although | |
86 | * it would not be called "OTG" ... | |
87 | */ | |
c6c56008 MN |
88 | .bmAttributes = USB_OTG_SRP | USB_OTG_HNP, |
89 | }, | |
90 | ||
91 | NULL | |
92 | }; | |
93 | ||
94 | /* string IDs are assigned dynamically */ | |
95 | ||
c6c56008 | 96 | static struct usb_string gfs_strings[] = { |
c6c56008 | 97 | #ifdef CONFIG_USB_FUNCTIONFS_RNDIS |
f8dae531 | 98 | { .s = "FunctionFS + RNDIS" }, |
c6c56008 MN |
99 | #endif |
100 | #ifdef CONFIG_USB_FUNCTIONFS_ETH | |
f8dae531 | 101 | { .s = "FunctionFS + ECM" }, |
c6c56008 MN |
102 | #endif |
103 | #ifdef CONFIG_USB_FUNCTIONFS_GENERIC | |
f8dae531 | 104 | { .s = "FunctionFS" }, |
c6c56008 MN |
105 | #endif |
106 | { } /* end of list */ | |
107 | }; | |
108 | ||
109 | static struct usb_gadget_strings *gfs_dev_strings[] = { | |
110 | &(struct usb_gadget_strings) { | |
111 | .language = 0x0409, /* en-us */ | |
112 | .strings = gfs_strings, | |
113 | }, | |
114 | NULL, | |
115 | }; | |
116 | ||
117 | ||
f8dae531 MN |
118 | |
119 | struct gfs_configuration { | |
120 | struct usb_configuration c; | |
121 | int (*eth)(struct usb_configuration *c, u8 *ethaddr); | |
122 | } gfs_configurations[] = { | |
c6c56008 | 123 | #ifdef CONFIG_USB_FUNCTIONFS_RNDIS |
f8dae531 MN |
124 | { |
125 | .eth = rndis_bind_config, | |
126 | }, | |
c6c56008 MN |
127 | #endif |
128 | ||
c6c56008 | 129 | #ifdef CONFIG_USB_FUNCTIONFS_ETH |
f8dae531 MN |
130 | { |
131 | .eth = eth_bind_config, | |
132 | }, | |
c6c56008 MN |
133 | #endif |
134 | ||
c6c56008 | 135 | #ifdef CONFIG_USB_FUNCTIONFS_GENERIC |
f8dae531 MN |
136 | { |
137 | }, | |
c6c56008 | 138 | #endif |
f8dae531 | 139 | }; |
c6c56008 MN |
140 | |
141 | ||
142 | static int gfs_bind(struct usb_composite_dev *cdev); | |
143 | static int gfs_unbind(struct usb_composite_dev *cdev); | |
f8dae531 | 144 | static int gfs_do_config(struct usb_configuration *c); |
c6c56008 MN |
145 | |
146 | static struct usb_composite_driver gfs_driver = { | |
fc19de61 | 147 | .name = DRIVER_NAME, |
c6c56008 MN |
148 | .dev = &gfs_dev_desc, |
149 | .strings = gfs_dev_strings, | |
150 | .bind = gfs_bind, | |
151 | .unbind = gfs_unbind, | |
fc19de61 | 152 | .iProduct = DRIVER_DESC, |
c6c56008 MN |
153 | }; |
154 | ||
155 | ||
156 | static struct ffs_data *gfs_ffs_data; | |
157 | static unsigned long gfs_registered; | |
158 | ||
159 | ||
160 | static int gfs_init(void) | |
161 | { | |
162 | ENTER(); | |
163 | ||
164 | return functionfs_init(); | |
165 | } | |
166 | module_init(gfs_init); | |
167 | ||
168 | static void gfs_exit(void) | |
169 | { | |
170 | ENTER(); | |
171 | ||
172 | if (test_and_clear_bit(0, &gfs_registered)) | |
173 | usb_composite_unregister(&gfs_driver); | |
174 | ||
175 | functionfs_cleanup(); | |
176 | } | |
177 | module_exit(gfs_exit); | |
178 | ||
179 | ||
180 | static int functionfs_ready_callback(struct ffs_data *ffs) | |
181 | { | |
182 | int ret; | |
183 | ||
184 | ENTER(); | |
185 | ||
186 | if (WARN_ON(test_and_set_bit(0, &gfs_registered))) | |
187 | return -EBUSY; | |
188 | ||
189 | gfs_ffs_data = ffs; | |
190 | ret = usb_composite_register(&gfs_driver); | |
191 | if (unlikely(ret < 0)) | |
192 | clear_bit(0, &gfs_registered); | |
193 | return ret; | |
194 | } | |
195 | ||
196 | static void functionfs_closed_callback(struct ffs_data *ffs) | |
197 | { | |
198 | ENTER(); | |
199 | ||
200 | if (test_and_clear_bit(0, &gfs_registered)) | |
201 | usb_composite_unregister(&gfs_driver); | |
202 | } | |
203 | ||
204 | ||
205 | static int functionfs_check_dev_callback(const char *dev_name) | |
206 | { | |
207 | return 0; | |
208 | } | |
209 | ||
210 | ||
211 | ||
212 | static int gfs_bind(struct usb_composite_dev *cdev) | |
213 | { | |
f8dae531 | 214 | int ret, i; |
c6c56008 MN |
215 | |
216 | ENTER(); | |
217 | ||
218 | if (WARN_ON(!gfs_ffs_data)) | |
219 | return -ENODEV; | |
220 | ||
221 | ret = gether_setup(cdev->gadget, gfs_hostaddr); | |
222 | if (unlikely(ret < 0)) | |
223 | goto error_quick; | |
224 | ||
f8dae531 | 225 | ret = usb_string_ids_tab(cdev, gfs_strings); |
c6c56008 MN |
226 | if (unlikely(ret < 0)) |
227 | goto error; | |
c6c56008 | 228 | |
c6c56008 MN |
229 | ret = functionfs_bind(gfs_ffs_data, cdev); |
230 | if (unlikely(ret < 0)) | |
231 | goto error; | |
232 | ||
f8dae531 MN |
233 | for (i = 0; i < ARRAY_SIZE(gfs_configurations); ++i) { |
234 | struct gfs_configuration *c = gfs_configurations + i; | |
c6c56008 | 235 | |
fc19de61 MN |
236 | c->c.label = gfs_strings[i].s; |
237 | c->c.iConfiguration = gfs_strings[i].id; | |
f8dae531 MN |
238 | c->c.bind = gfs_do_config; |
239 | c->c.bConfigurationValue = 1 + i; | |
240 | c->c.bmAttributes = USB_CONFIG_ATT_SELFPOWER; | |
c6c56008 | 241 | |
f8dae531 MN |
242 | ret = usb_add_config(cdev, &c->c); |
243 | if (unlikely(ret < 0)) | |
244 | goto error_unbind; | |
245 | } | |
c6c56008 MN |
246 | |
247 | return 0; | |
248 | ||
249 | error_unbind: | |
250 | functionfs_unbind(gfs_ffs_data); | |
251 | error: | |
252 | gether_cleanup(); | |
253 | error_quick: | |
254 | gfs_ffs_data = NULL; | |
255 | return ret; | |
256 | } | |
257 | ||
258 | static int gfs_unbind(struct usb_composite_dev *cdev) | |
259 | { | |
260 | ENTER(); | |
261 | ||
fc19de61 MN |
262 | /* |
263 | * We may have been called in an error recovery from | |
c6c56008 MN |
264 | * composite_bind() after gfs_unbind() failure so we need to |
265 | * check if gfs_ffs_data is not NULL since gfs_bind() handles | |
266 | * all error recovery itself. I'd rather we werent called | |
267 | * from composite on orror recovery, but what you're gonna | |
fc19de61 MN |
268 | * do...? |
269 | */ | |
c6c56008 MN |
270 | if (gfs_ffs_data) { |
271 | gether_cleanup(); | |
272 | functionfs_unbind(gfs_ffs_data); | |
273 | gfs_ffs_data = NULL; | |
274 | } | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
279 | ||
f8dae531 | 280 | static int gfs_do_config(struct usb_configuration *c) |
c6c56008 | 281 | { |
f8dae531 MN |
282 | struct gfs_configuration *gc = |
283 | container_of(c, struct gfs_configuration, c); | |
c6c56008 MN |
284 | int ret; |
285 | ||
286 | if (WARN_ON(!gfs_ffs_data)) | |
287 | return -ENODEV; | |
288 | ||
289 | if (gadget_is_otg(c->cdev->gadget)) { | |
290 | c->descriptors = gfs_otg_desc; | |
291 | c->bmAttributes |= USB_CONFIG_ATT_WAKEUP; | |
292 | } | |
293 | ||
f8dae531 MN |
294 | if (gc->eth) { |
295 | ret = gc->eth(c, gfs_hostaddr); | |
c6c56008 MN |
296 | if (unlikely(ret < 0)) |
297 | return ret; | |
298 | } | |
299 | ||
7898aee1 | 300 | ret = functionfs_bind_config(c->cdev, c, gfs_ffs_data); |
c6c56008 MN |
301 | if (unlikely(ret < 0)) |
302 | return ret; | |
303 | ||
fc19de61 MN |
304 | /* |
305 | * After previous do_configs there may be some invalid | |
f588c0db MN |
306 | * pointers in c->interface array. This happens every time |
307 | * a user space function with fewer interfaces than a user | |
308 | * space function that was run before the new one is run. The | |
309 | * compasit's set_config() assumes that if there is no more | |
310 | * then MAX_CONFIG_INTERFACES interfaces in a configuration | |
311 | * then there is a NULL pointer after the last interface in | |
fc19de61 MN |
312 | * c->interface array. We need to make sure this is true. |
313 | */ | |
f588c0db MN |
314 | if (c->next_interface_id < ARRAY_SIZE(c->interface)) |
315 | c->interface[c->next_interface_id] = NULL; | |
316 | ||
c6c56008 MN |
317 | return 0; |
318 | } | |
319 | ||
c6c56008 MN |
320 | |
321 | #ifdef CONFIG_USB_FUNCTIONFS_ETH | |
fc19de61 | 322 | |
f8dae531 | 323 | static int eth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]) |
c6c56008 | 324 | { |
f8dae531 MN |
325 | return can_support_ecm(c->cdev->gadget) |
326 | ? ecm_bind_config(c, ethaddr) | |
327 | : geth_bind_config(c, ethaddr); | |
c6c56008 | 328 | } |
fc19de61 | 329 | |
c6c56008 | 330 | #endif |