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Commit | Line | Data |
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c8a797a9 GKH |
1 | /* |
2 | * Greybus "Core" | |
3 | * | |
4 | * Copyright 2014 Google Inc. | |
5 | * | |
6 | * Released under the GPLv2 only. | |
7 | */ | |
8 | ||
9 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
10 | ||
11 | #include <linux/types.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/moduleparam.h> | |
14 | #include <linux/kernel.h> | |
a239f67c | 15 | #include <linux/slab.h> |
c8a797a9 GKH |
16 | #include <linux/device.h> |
17 | ||
18 | #include "greybus.h" | |
19 | ||
20 | /* Allow greybus to be disabled at boot if needed */ | |
21 | static bool nogreybus; | |
22 | #ifdef MODULE | |
23 | module_param(nogreybus, bool, 0444); | |
24 | #else | |
25 | core_param(nogreybus, bool, 0444); | |
26 | #endif | |
27 | int greybus_disabled(void) | |
28 | { | |
29 | return nogreybus; | |
30 | } | |
31 | EXPORT_SYMBOL_GPL(greybus_disabled); | |
32 | ||
33 | static int greybus_match_one_id(struct greybus_device *gdev, | |
6584c8af | 34 | const struct greybus_module_id *id) |
c8a797a9 | 35 | { |
6dca7b97 GKH |
36 | struct greybus_descriptor_module_id *module_id; |
37 | struct greybus_descriptor_serial_number *serial_num; | |
38 | ||
39 | module_id = &gdev->module_id; | |
40 | serial_num = &gdev->serial_number; | |
c8a797a9 GKH |
41 | |
42 | if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_VENDOR) && | |
6dca7b97 | 43 | (id->vendor != le16_to_cpu(module_id->vendor))) |
c8a797a9 GKH |
44 | return 0; |
45 | ||
46 | if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_PRODUCT) && | |
6dca7b97 | 47 | (id->product != le16_to_cpu(module_id->product))) |
c8a797a9 GKH |
48 | return 0; |
49 | ||
50 | if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_SERIAL) && | |
6dca7b97 | 51 | (id->serial_number != le64_to_cpu(serial_num->serial_number))) |
c8a797a9 GKH |
52 | return 0; |
53 | ||
54 | return 1; | |
55 | } | |
56 | ||
6584c8af | 57 | static const struct greybus_module_id *greybus_match_id( |
c8a797a9 | 58 | struct greybus_device *gdev, |
6584c8af | 59 | const struct greybus_module_id *id) |
c8a797a9 GKH |
60 | { |
61 | if (id == NULL) | |
62 | return NULL; | |
63 | ||
6dca7b97 | 64 | for (; id->vendor || id->product || id->serial_number || |
c8a797a9 GKH |
65 | id->driver_info ; id++) { |
66 | if (greybus_match_one_id(gdev, id)) | |
67 | return id; | |
68 | } | |
69 | ||
70 | return NULL; | |
71 | } | |
72 | ||
73 | static int greybus_device_match(struct device *dev, struct device_driver *drv) | |
74 | { | |
75 | struct greybus_driver *driver = to_greybus_driver(dev->driver); | |
76 | struct greybus_device *gdev = to_greybus_device(dev); | |
6584c8af | 77 | const struct greybus_module_id *id; |
c8a797a9 GKH |
78 | |
79 | id = greybus_match_id(gdev, driver->id_table); | |
80 | if (id) | |
81 | return 1; | |
82 | /* FIXME - Dyanmic ids? */ | |
83 | return 0; | |
84 | } | |
85 | ||
86 | static int greybus_uevent(struct device *dev, struct kobj_uevent_env *env) | |
87 | { | |
88 | /* struct greybus_device *gdev = to_greybus_device(dev); */ | |
89 | ||
90 | /* FIXME - add some uevents here... */ | |
91 | return 0; | |
92 | } | |
93 | ||
27fb8310 | 94 | static struct bus_type greybus_bus_type = { |
c8a797a9 GKH |
95 | .name = "greybus", |
96 | .match = greybus_device_match, | |
97 | .uevent = greybus_uevent, | |
98 | }; | |
99 | ||
100 | static int greybus_probe(struct device *dev) | |
101 | { | |
102 | struct greybus_driver *driver = to_greybus_driver(dev->driver); | |
103 | struct greybus_device *gdev = to_greybus_device(dev); | |
6584c8af | 104 | const struct greybus_module_id *id; |
c8a797a9 GKH |
105 | int retval; |
106 | ||
107 | /* match id */ | |
108 | id = greybus_match_id(gdev, driver->id_table); | |
109 | if (!id) | |
110 | return -ENODEV; | |
111 | ||
112 | retval = driver->probe(gdev, id); | |
113 | if (retval) | |
114 | return retval; | |
115 | ||
116 | return 0; | |
117 | } | |
118 | ||
119 | static int greybus_remove(struct device *dev) | |
120 | { | |
121 | struct greybus_driver *driver = to_greybus_driver(dev->driver); | |
122 | struct greybus_device *gdev = to_greybus_device(dev); | |
123 | ||
124 | driver->disconnect(gdev); | |
125 | return 0; | |
126 | } | |
127 | ||
128 | int greybus_register_driver(struct greybus_driver *driver, struct module *owner, | |
129 | const char *mod_name) | |
130 | { | |
131 | int retval; | |
132 | ||
133 | if (greybus_disabled()) | |
134 | return -ENODEV; | |
135 | ||
136 | driver->driver.name = driver->name; | |
137 | driver->driver.probe = greybus_probe; | |
138 | driver->driver.remove = greybus_remove; | |
139 | driver->driver.owner = owner; | |
140 | driver->driver.mod_name = mod_name; | |
141 | ||
142 | retval = driver_register(&driver->driver); | |
143 | if (retval) | |
144 | return retval; | |
145 | ||
146 | pr_info("registered new driver %s\n", driver->name); | |
147 | return 0; | |
148 | } | |
149 | EXPORT_SYMBOL_GPL(greybus_register_driver); | |
150 | ||
151 | void greybus_deregister(struct greybus_driver *driver) | |
152 | { | |
153 | driver_unregister(&driver->driver); | |
154 | } | |
155 | EXPORT_SYMBOL_GPL(greybus_deregister); | |
156 | ||
199d68d4 | 157 | |
b94295e0 GKH |
158 | static void greybus_module_release(struct device *dev) |
159 | { | |
160 | struct greybus_device *gdev = to_greybus_device(dev); | |
161 | int i; | |
162 | ||
163 | for (i = 0; i < gdev->num_strings; ++i) | |
164 | kfree(gdev->string[i]); | |
165 | for (i = 0; i < gdev->num_cports; ++i) | |
166 | kfree(gdev->cport[i]); | |
167 | kfree(gdev); | |
168 | } | |
169 | ||
170 | ||
e24e7257 GKH |
171 | const u8 *greybus_string(struct greybus_device *gdev, int id) |
172 | { | |
173 | int i; | |
174 | struct gdev_string *string; | |
175 | ||
176 | if (!gdev) | |
177 | return NULL; | |
178 | ||
179 | for (i = 0; i < gdev->num_strings; ++i) { | |
180 | string = gdev->string[i]; | |
181 | if (string->id == id) | |
182 | return &string->string[0]; | |
183 | } | |
184 | return NULL; | |
185 | } | |
186 | ||
b94295e0 GKH |
187 | static struct device_type greybus_module_type = { |
188 | .name = "greybus_module", | |
189 | .release = greybus_module_release, | |
190 | }; | |
191 | ||
a239f67c GKH |
192 | static int gb_init_subdevs(struct greybus_device *gdev, |
193 | const struct greybus_module_id *id) | |
199d68d4 GKH |
194 | { |
195 | int retval; | |
196 | ||
197 | /* Allocate all of the different "sub device types" for this device */ | |
198 | retval = gb_i2c_probe(gdev, id); | |
db6e1fd2 GKH |
199 | if (retval) |
200 | goto error_i2c; | |
201 | ||
202 | retval = gb_gpio_probe(gdev, id); | |
203 | if (retval) | |
204 | goto error_gpio; | |
205 | ||
206 | retval = gb_sdio_probe(gdev, id); | |
207 | if (retval) | |
208 | goto error_sdio; | |
209 | ||
210 | retval = gb_tty_probe(gdev, id); | |
211 | if (retval) | |
212 | goto error_tty; | |
33ea3a3f GKH |
213 | |
214 | retval = gb_battery_probe(gdev, id); | |
215 | if (retval) | |
216 | goto error_battery; | |
199d68d4 | 217 | return 0; |
db6e1fd2 | 218 | |
33ea3a3f GKH |
219 | error_battery: |
220 | gb_tty_disconnect(gdev); | |
221 | ||
db6e1fd2 GKH |
222 | error_tty: |
223 | gb_sdio_disconnect(gdev); | |
224 | ||
225 | error_sdio: | |
226 | gb_gpio_disconnect(gdev); | |
227 | ||
228 | error_gpio: | |
229 | gb_i2c_disconnect(gdev); | |
230 | ||
231 | error_i2c: | |
232 | return retval; | |
199d68d4 GKH |
233 | } |
234 | ||
3be03d42 GKH |
235 | static const struct greybus_module_id fake_gb_id = { |
236 | GREYBUS_DEVICE(0x42, 0x42) | |
237 | }; | |
a239f67c | 238 | |
526c5c8d | 239 | static int create_function(struct greybus_device *gdev, |
3d545326 GKH |
240 | struct greybus_descriptor_function *function, |
241 | size_t desc_size) | |
526c5c8d | 242 | { |
3d545326 GKH |
243 | if (desc_size != sizeof(*function)) { |
244 | dev_err(gdev->dev.parent, "invalid function header size %zu\n", | |
b94295e0 | 245 | desc_size); |
526c5c8d GKH |
246 | return -EINVAL; |
247 | } | |
3d545326 | 248 | memcpy(&gdev->function, function, desc_size); |
526c5c8d GKH |
249 | return 0; |
250 | } | |
251 | ||
252 | static int create_module_id(struct greybus_device *gdev, | |
3d545326 GKH |
253 | struct greybus_descriptor_module_id *module_id, |
254 | size_t desc_size) | |
526c5c8d | 255 | { |
3d545326 GKH |
256 | if (desc_size != sizeof(*module_id)) { |
257 | dev_err(gdev->dev.parent, "invalid module header size %zu\n", | |
b94295e0 | 258 | desc_size); |
526c5c8d GKH |
259 | return -EINVAL; |
260 | } | |
3d545326 | 261 | memcpy(&gdev->module_id, module_id, desc_size); |
526c5c8d GKH |
262 | return 0; |
263 | } | |
264 | ||
265 | static int create_serial_number(struct greybus_device *gdev, | |
3d545326 GKH |
266 | struct greybus_descriptor_serial_number *serial_num, |
267 | size_t desc_size) | |
526c5c8d | 268 | { |
3d545326 GKH |
269 | if (desc_size != sizeof(*serial_num)) { |
270 | dev_err(gdev->dev.parent, "invalid serial number header size %zu\n", | |
b94295e0 | 271 | desc_size); |
526c5c8d GKH |
272 | return -EINVAL; |
273 | } | |
3d545326 | 274 | memcpy(&gdev->serial_number, serial_num, desc_size); |
526c5c8d GKH |
275 | return 0; |
276 | } | |
277 | ||
278 | static int create_string(struct greybus_device *gdev, | |
3d545326 GKH |
279 | struct greybus_descriptor_string *string, |
280 | size_t desc_size) | |
526c5c8d GKH |
281 | { |
282 | int string_size; | |
3d545326 | 283 | struct gdev_string *gdev_string; |
526c5c8d GKH |
284 | |
285 | if ((gdev->num_strings + 1) >= MAX_STRINGS_PER_MODULE) { | |
b94295e0 GKH |
286 | dev_err(gdev->dev.parent, |
287 | "too many strings for this module!\n"); | |
526c5c8d GKH |
288 | return -EINVAL; |
289 | } | |
290 | ||
3d545326 GKH |
291 | if (desc_size < sizeof(*string)) { |
292 | dev_err(gdev->dev.parent, "invalid string header size %zu\n", | |
b94295e0 | 293 | desc_size); |
526c5c8d GKH |
294 | return -EINVAL; |
295 | } | |
296 | ||
3d545326 GKH |
297 | string_size = le16_to_cpu(string->length); |
298 | gdev_string = kzalloc(sizeof(*gdev_string) + string_size + 1, GFP_KERNEL); | |
299 | if (!gdev_string) | |
526c5c8d GKH |
300 | return -ENOMEM; |
301 | ||
3d545326 GKH |
302 | gdev_string->length = string_size; |
303 | gdev_string->id = string->id; | |
304 | memcpy(&gdev_string->string, &string->string, string_size); | |
b94295e0 | 305 | |
3d545326 | 306 | gdev->string[gdev->num_strings] = gdev_string; |
526c5c8d GKH |
307 | gdev->num_strings++; |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
b94295e0 | 312 | static int create_cport(struct greybus_device *gdev, |
3d545326 GKH |
313 | struct greybus_descriptor_cport *cport, |
314 | size_t desc_size) | |
b94295e0 | 315 | { |
3d545326 | 316 | struct gdev_cport *gdev_cport; |
b94295e0 GKH |
317 | |
318 | if ((gdev->num_cports + 1) >= MAX_CPORTS_PER_MODULE) { | |
319 | dev_err(gdev->dev.parent, "too many cports for this module!\n"); | |
320 | return -EINVAL; | |
321 | } | |
322 | ||
3d545326 | 323 | if (desc_size != sizeof(*cport)) { |
b94295e0 | 324 | dev_err(gdev->dev.parent, |
3d545326 | 325 | "invalid serial number header size %zu\n", desc_size); |
b94295e0 GKH |
326 | return -EINVAL; |
327 | } | |
328 | ||
3d545326 GKH |
329 | gdev_cport = kzalloc(sizeof(*gdev_cport), GFP_KERNEL); |
330 | if (!gdev_cport) | |
b94295e0 GKH |
331 | return -ENOMEM; |
332 | ||
3d545326 GKH |
333 | gdev_cport->number = le16_to_cpu(cport->number); |
334 | gdev_cport->size = le16_to_cpu(cport->size); | |
335 | gdev_cport->speed = cport->speed; | |
b94295e0 | 336 | |
3d545326 | 337 | gdev->cport[gdev->num_cports] = gdev_cport; |
b94295e0 GKH |
338 | gdev->num_cports++; |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
a239f67c | 343 | /** |
05ad189c | 344 | * greybus_new_module: |
a239f67c | 345 | * |
05ad189c AE |
346 | * Pass in a buffer that _should_ contain a Greybus module manifest |
347 | * and spit out a greybus device structure. | |
a239f67c | 348 | */ |
6779997d GKH |
349 | void gb_add_module(struct greybus_host_device *hd, u8 module_id, u8 *data) |
350 | { | |
351 | // FIXME - should be the new module call... | |
352 | } | |
353 | ||
05ad189c | 354 | struct greybus_device *greybus_new_module(struct device *parent, |
b94295e0 | 355 | int module_number, u8 *data, int size) |
a239f67c GKH |
356 | { |
357 | struct greybus_device *gdev; | |
badad68e | 358 | struct greybus_manifest *manifest; |
a239f67c GKH |
359 | int retval; |
360 | int overall_size; | |
a239f67c GKH |
361 | u8 version_major; |
362 | u8 version_minor; | |
363 | ||
05ad189c | 364 | /* we have to have at _least_ the manifest header */ |
badad68e | 365 | if (size <= sizeof(manifest->header)) |
a239f67c GKH |
366 | return NULL; |
367 | ||
368 | gdev = kzalloc(sizeof(*gdev), GFP_KERNEL); | |
369 | if (!gdev) | |
370 | return NULL; | |
371 | ||
372 | gdev->module_number = module_number; | |
b94295e0 GKH |
373 | gdev->dev.parent = parent; |
374 | gdev->dev.driver = NULL; | |
375 | gdev->dev.bus = &greybus_bus_type; | |
376 | gdev->dev.type = &greybus_module_type; | |
377 | gdev->dev.groups = greybus_module_groups; | |
378 | gdev->dev.dma_mask = parent->dma_mask; | |
379 | device_initialize(&gdev->dev); | |
380 | dev_set_name(&gdev->dev, "%d", module_number); | |
a239f67c | 381 | |
badad68e AE |
382 | manifest = (struct greybus_manifest *)data; |
383 | overall_size = le16_to_cpu(manifest->header.size); | |
a239f67c | 384 | if (overall_size != size) { |
05ad189c AE |
385 | dev_err(parent, "size != manifest header size, %d != %d\n", |
386 | size, overall_size); | |
a239f67c GKH |
387 | goto error; |
388 | } | |
389 | ||
badad68e AE |
390 | version_major = manifest->header.version_major; |
391 | version_minor = manifest->header.version_minor; | |
a239f67c | 392 | |
a1dc62b0 GKH |
393 | /* Validate major/minor number */ |
394 | if ((version_major != GREYBUS_VERSION_MAJOR) || | |
395 | (version_minor != GREYBUS_VERSION_MINOR)) { | |
396 | dev_err(parent, | |
397 | "Invalid greybus versions, expected %d.%d, got %d.%d\n", | |
398 | GREYBUS_VERSION_MAJOR, GREYBUS_VERSION_MINOR, | |
399 | version_major, version_minor); | |
400 | goto error; | |
401 | } | |
a239f67c | 402 | |
badad68e AE |
403 | size -= sizeof(manifest->header); |
404 | data += sizeof(manifest->header); | |
a239f67c | 405 | while (size > 0) { |
e82bef42 AE |
406 | struct greybus_descriptor *desc; |
407 | u16 desc_size; | |
408 | size_t data_size; | |
409 | ||
57fc0a11 AE |
410 | if (size < sizeof(desc->header)) { |
411 | dev_err(parent, "remaining size %d too small\n", size); | |
412 | goto error; | |
413 | } | |
a239f67c GKH |
414 | desc = (struct greybus_descriptor *)data; |
415 | desc_size = le16_to_cpu(desc->header.size); | |
57fc0a11 AE |
416 | if (size < desc_size) { |
417 | dev_err(parent, "descriptor size %d too big\n", | |
418 | desc_size); | |
419 | goto error; | |
420 | } | |
e82bef42 | 421 | data_size = (size_t)desc_size - sizeof(desc->header); |
a239f67c | 422 | |
a22e15a1 | 423 | switch (le16_to_cpu(desc->header.type)) { |
a239f67c | 424 | case GREYBUS_TYPE_FUNCTION: |
3d545326 GKH |
425 | retval = create_function(gdev, &desc->function, |
426 | data_size); | |
a239f67c GKH |
427 | break; |
428 | ||
429 | case GREYBUS_TYPE_MODULE_ID: | |
3d545326 GKH |
430 | retval = create_module_id(gdev, &desc->module_id, |
431 | data_size); | |
a239f67c GKH |
432 | break; |
433 | ||
434 | case GREYBUS_TYPE_SERIAL_NUMBER: | |
3d545326 GKH |
435 | retval = create_serial_number(gdev, |
436 | &desc->serial_number, | |
437 | data_size); | |
526c5c8d GKH |
438 | break; |
439 | ||
440 | case GREYBUS_TYPE_STRING: | |
3d545326 | 441 | retval = create_string(gdev, &desc->string, data_size); |
526c5c8d GKH |
442 | break; |
443 | ||
b94295e0 | 444 | case GREYBUS_TYPE_CPORT: |
3d545326 | 445 | retval = create_cport(gdev, &desc->cport, data_size); |
a239f67c | 446 | break; |
b94295e0 | 447 | |
a239f67c GKH |
448 | case GREYBUS_TYPE_INVALID: |
449 | default: | |
b94295e0 GKH |
450 | dev_err(parent, "invalid descriptor type %d\n", |
451 | desc->header.type); | |
a239f67c GKH |
452 | goto error; |
453 | } | |
526c5c8d GKH |
454 | if (retval) |
455 | goto error; | |
456 | size -= desc_size; | |
457 | data += desc_size; | |
a239f67c | 458 | } |
526c5c8d | 459 | |
a239f67c GKH |
460 | retval = gb_init_subdevs(gdev, &fake_gb_id); |
461 | if (retval) | |
462 | goto error; | |
b94295e0 GKH |
463 | |
464 | // FIXME device_add(&gdev->dev); | |
465 | ||
466 | ||
a239f67c GKH |
467 | return gdev; |
468 | error: | |
a5808add | 469 | put_device(&gdev->dev); |
b94295e0 | 470 | greybus_module_release(&gdev->dev); |
a239f67c GKH |
471 | return NULL; |
472 | } | |
473 | ||
6779997d GKH |
474 | void gb_remove_module(struct greybus_host_device *hd, u8 module_id) |
475 | { | |
476 | // FIXME should be the remove_device call... | |
477 | } | |
478 | ||
b94295e0 | 479 | void greybus_remove_device(struct greybus_device *gdev) |
db6e1fd2 GKH |
480 | { |
481 | /* tear down all of the "sub device types" for this device */ | |
482 | gb_i2c_disconnect(gdev); | |
483 | gb_gpio_disconnect(gdev); | |
484 | gb_sdio_disconnect(gdev); | |
485 | gb_tty_disconnect(gdev); | |
33ea3a3f | 486 | gb_battery_disconnect(gdev); |
b94295e0 GKH |
487 | |
488 | // FIXME - device_remove(&gdev->dev); | |
db6e1fd2 | 489 | } |
199d68d4 | 490 | |
68f1fc4d GKH |
491 | static DEFINE_MUTEX(hd_mutex); |
492 | ||
493 | static void free_hd(struct kref *kref) | |
494 | { | |
495 | struct greybus_host_device *hd; | |
496 | ||
497 | hd = container_of(kref, struct greybus_host_device, kref); | |
498 | ||
499 | kfree(hd); | |
500 | } | |
501 | ||
a39879fc GKH |
502 | struct greybus_host_device *greybus_create_hd(struct greybus_host_driver *driver, |
503 | struct device *parent) | |
504 | { | |
505 | struct greybus_host_device *hd; | |
506 | ||
507 | hd = kzalloc(sizeof(*hd) + driver->hd_priv_size, GFP_KERNEL); | |
508 | if (!hd) | |
509 | return NULL; | |
510 | ||
511 | kref_init(&hd->kref); | |
772149b6 GKH |
512 | hd->parent = parent; |
513 | hd->driver = driver; | |
a39879fc GKH |
514 | |
515 | return hd; | |
516 | } | |
517 | EXPORT_SYMBOL_GPL(greybus_create_hd); | |
518 | ||
68f1fc4d GKH |
519 | void greybus_remove_hd(struct greybus_host_device *hd) |
520 | { | |
521 | kref_put_mutex(&hd->kref, free_hd, &hd_mutex); | |
522 | } | |
523 | EXPORT_SYMBOL_GPL(greybus_remove_hd); | |
524 | ||
a39879fc | 525 | |
503c1cdb | 526 | static int __init gb_init(void) |
199d68d4 | 527 | { |
db6e1fd2 GKH |
528 | int retval; |
529 | ||
de536e30 | 530 | retval = gb_debugfs_init(); |
168db1cd GKH |
531 | if (retval) { |
532 | pr_err("debugfs failed\n"); | |
db6e1fd2 | 533 | return retval; |
168db1cd | 534 | } |
db6e1fd2 | 535 | |
27fb8310 | 536 | retval = bus_register(&greybus_bus_type); |
168db1cd GKH |
537 | if (retval) { |
538 | pr_err("bus_register failed\n"); | |
27fb8310 | 539 | goto error_bus; |
168db1cd | 540 | } |
27fb8310 | 541 | |
45f3678b | 542 | retval = gb_ap_init(); |
168db1cd | 543 | if (retval) { |
45f3678b GKH |
544 | pr_err("gb_ap_init failed\n"); |
545 | goto error_ap; | |
168db1cd | 546 | } |
de536e30 | 547 | |
45f3678b GKH |
548 | retval = gb_gbuf_init(); |
549 | if (retval) { | |
550 | pr_err("gb_gbuf_init failed\n"); | |
551 | goto error_gbuf; | |
552 | } | |
27fb8310 GKH |
553 | |
554 | retval = gb_tty_init(); | |
168db1cd GKH |
555 | if (retval) { |
556 | pr_err("gb_tty_init failed\n"); | |
27fb8310 | 557 | goto error_tty; |
168db1cd | 558 | } |
27fb8310 | 559 | |
199d68d4 | 560 | return 0; |
27fb8310 GKH |
561 | |
562 | error_tty: | |
45f3678b GKH |
563 | gb_gbuf_exit(); |
564 | ||
565 | error_gbuf: | |
566 | gb_ap_exit(); | |
de536e30 | 567 | |
45f3678b | 568 | error_ap: |
27fb8310 GKH |
569 | bus_unregister(&greybus_bus_type); |
570 | ||
571 | error_bus: | |
de536e30 | 572 | gb_debugfs_cleanup(); |
27fb8310 GKH |
573 | |
574 | return retval; | |
199d68d4 GKH |
575 | } |
576 | ||
503c1cdb | 577 | static void __exit gb_exit(void) |
199d68d4 | 578 | { |
db6e1fd2 | 579 | gb_tty_exit(); |
45f3678b GKH |
580 | gb_gbuf_exit(); |
581 | gb_ap_exit(); | |
27fb8310 | 582 | bus_unregister(&greybus_bus_type); |
de536e30 | 583 | gb_debugfs_cleanup(); |
199d68d4 GKH |
584 | } |
585 | ||
586 | module_init(gb_init); | |
587 | module_exit(gb_exit); | |
588 | ||
c8a797a9 GKH |
589 | MODULE_LICENSE("GPL"); |
590 | MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>"); |