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6c54c28e AS |
1 | /* |
2 | * dell_rbu.c | |
3 | * Bios Update driver for Dell systems | |
4 | * Author: Dell Inc | |
5 | * Abhay Salunke <abhay_salunke@dell.com> | |
6 | * | |
7 | * Copyright (C) 2005 Dell Inc. | |
8 | * | |
9 | * Remote BIOS Update (rbu) driver is used for updating DELL BIOS by | |
10 | * creating entries in the /sys file systems on Linux 2.6 and higher | |
11 | * kernels. The driver supports two mechanism to update the BIOS namely | |
12 | * contiguous and packetized. Both these methods still require having some | |
13 | * application to set the CMOS bit indicating the BIOS to update itself | |
14 | * after a reboot. | |
15 | * | |
16 | * Contiguous method: | |
17 | * This driver writes the incoming data in a monolithic image by allocating | |
18 | * contiguous physical pages large enough to accommodate the incoming BIOS | |
19 | * image size. | |
20 | * | |
21 | * Packetized method: | |
22 | * The driver writes the incoming packet image by allocating a new packet | |
23 | * on every time the packet data is written. This driver requires an | |
24 | * application to break the BIOS image in to fixed sized packet chunks. | |
25 | * | |
26 | * See Documentation/dell_rbu.txt for more info. | |
27 | * | |
28 | * This program is free software; you can redistribute it and/or modify | |
29 | * it under the terms of the GNU General Public License v2.0 as published by | |
30 | * the Free Software Foundation | |
31 | * | |
32 | * This program is distributed in the hope that it will be useful, | |
33 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
34 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
35 | * GNU General Public License for more details. | |
36 | */ | |
37 | #include <linux/version.h> | |
38 | #include <linux/config.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/module.h> | |
41 | #include <linux/string.h> | |
42 | #include <linux/errno.h> | |
43 | #include <linux/blkdev.h> | |
44 | #include <linux/device.h> | |
45 | #include <linux/spinlock.h> | |
46 | #include <linux/moduleparam.h> | |
47 | #include <linux/firmware.h> | |
48 | #include <linux/dma-mapping.h> | |
49 | ||
50 | MODULE_AUTHOR("Abhay Salunke <abhay_salunke@dell.com>"); | |
51 | MODULE_DESCRIPTION("Driver for updating BIOS image on DELL systems"); | |
52 | MODULE_LICENSE("GPL"); | |
53 | MODULE_VERSION("1.0"); | |
54 | ||
55 | #define BIOS_SCAN_LIMIT 0xffffffff | |
56 | #define MAX_IMAGE_LENGTH 16 | |
57 | static struct _rbu_data { | |
58 | void *image_update_buffer; | |
59 | unsigned long image_update_buffer_size; | |
60 | unsigned long bios_image_size; | |
61 | int image_update_ordernum; | |
62 | int dma_alloc; | |
63 | spinlock_t lock; | |
64 | unsigned long packet_read_count; | |
65 | unsigned long packet_write_count; | |
66 | unsigned long num_packets; | |
67 | unsigned long packetsize; | |
68 | } rbu_data; | |
69 | ||
70 | static char image_type[MAX_IMAGE_LENGTH] = "mono"; | |
71 | module_param_string(image_type, image_type, sizeof(image_type), 0); | |
72 | MODULE_PARM_DESC(image_type, "BIOS image type. choose- mono or packet"); | |
73 | ||
74 | struct packet_data { | |
75 | struct list_head list; | |
76 | size_t length; | |
77 | void *data; | |
78 | int ordernum; | |
79 | }; | |
80 | ||
81 | static struct packet_data packet_data_head; | |
82 | ||
83 | static struct platform_device *rbu_device; | |
84 | static int context; | |
85 | static dma_addr_t dell_rbu_dmaaddr; | |
86 | ||
87 | static void init_packet_head(void) | |
88 | { | |
89 | INIT_LIST_HEAD(&packet_data_head.list); | |
90 | rbu_data.packet_write_count = 0; | |
91 | rbu_data.packet_read_count = 0; | |
92 | rbu_data.num_packets = 0; | |
93 | rbu_data.packetsize = 0; | |
94 | } | |
95 | ||
96 | static int fill_last_packet(void *data, size_t length) | |
97 | { | |
98 | struct list_head *ptemp_list; | |
99 | struct packet_data *packet = NULL; | |
100 | int packet_count = 0; | |
101 | ||
102 | pr_debug("fill_last_packet: entry \n"); | |
103 | ||
104 | if (!rbu_data.num_packets) { | |
105 | pr_debug("fill_last_packet: num_packets=0\n"); | |
106 | return -ENOMEM; | |
107 | } | |
108 | ||
109 | packet_count = rbu_data.num_packets; | |
110 | ||
111 | ptemp_list = (&packet_data_head.list)->prev; | |
112 | ||
113 | packet = list_entry(ptemp_list, struct packet_data, list); | |
114 | ||
115 | if ((rbu_data.packet_write_count + length) > rbu_data.packetsize) { | |
116 | pr_debug("dell_rbu:%s: packet size data " | |
117 | "overrun\n", __FUNCTION__); | |
118 | return -EINVAL; | |
119 | } | |
120 | ||
121 | pr_debug("fill_last_packet : buffer = %p\n", packet->data); | |
122 | ||
123 | memcpy((packet->data + rbu_data.packet_write_count), data, length); | |
124 | ||
125 | if ((rbu_data.packet_write_count + length) == rbu_data.packetsize) { | |
126 | /* | |
127 | * this was the last data chunk in the packet | |
128 | * so reinitialize the packet data counter to zero | |
129 | */ | |
130 | rbu_data.packet_write_count = 0; | |
131 | } else | |
132 | rbu_data.packet_write_count += length; | |
133 | ||
134 | pr_debug("fill_last_packet: exit \n"); | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static int create_packet(size_t length) | |
139 | { | |
140 | struct packet_data *newpacket; | |
141 | int ordernum = 0; | |
142 | ||
143 | pr_debug("create_packet: entry \n"); | |
144 | ||
145 | if (!rbu_data.packetsize) { | |
146 | pr_debug("create_packet: packetsize not specified\n"); | |
147 | return -EINVAL; | |
148 | } | |
149 | ||
150 | newpacket = kmalloc(sizeof(struct packet_data), GFP_KERNEL); | |
151 | if (!newpacket) { | |
152 | printk(KERN_WARNING | |
153 | "dell_rbu:%s: failed to allocate new " | |
154 | "packet\n", __FUNCTION__); | |
155 | return -ENOMEM; | |
156 | } | |
157 | ||
158 | ordernum = get_order(length); | |
159 | /* | |
160 | * there is no upper limit on memory | |
161 | * address for packetized mechanism | |
162 | */ | |
163 | newpacket->data = (unsigned char *)__get_free_pages(GFP_KERNEL, | |
164 | ordernum); | |
165 | ||
166 | pr_debug("create_packet: newpacket %p\n", newpacket->data); | |
167 | ||
168 | if (!newpacket->data) { | |
169 | printk(KERN_WARNING | |
170 | "dell_rbu:%s: failed to allocate new " | |
171 | "packet\n", __FUNCTION__); | |
172 | kfree(newpacket); | |
173 | return -ENOMEM; | |
174 | } | |
175 | ||
176 | newpacket->ordernum = ordernum; | |
177 | ++rbu_data.num_packets; | |
178 | /* | |
179 | * initialize the newly created packet headers | |
180 | */ | |
181 | INIT_LIST_HEAD(&newpacket->list); | |
182 | list_add_tail(&newpacket->list, &packet_data_head.list); | |
183 | /* | |
184 | * packets have fixed size | |
185 | */ | |
186 | newpacket->length = rbu_data.packetsize; | |
187 | ||
188 | pr_debug("create_packet: exit \n"); | |
189 | ||
190 | return 0; | |
191 | } | |
192 | ||
193 | static int packetize_data(void *data, size_t length) | |
194 | { | |
195 | int rc = 0; | |
196 | ||
197 | if (!rbu_data.packet_write_count) { | |
198 | if ((rc = create_packet(length))) | |
199 | return rc; | |
200 | } | |
201 | if ((rc = fill_last_packet(data, length))) | |
202 | return rc; | |
203 | ||
204 | return rc; | |
205 | } | |
206 | ||
207 | static int | |
208 | do_packet_read(char *data, struct list_head *ptemp_list, | |
209 | int length, int bytes_read, int *list_read_count) | |
210 | { | |
211 | void *ptemp_buf; | |
212 | struct packet_data *newpacket = NULL; | |
213 | int bytes_copied = 0; | |
214 | int j = 0; | |
215 | ||
216 | newpacket = list_entry(ptemp_list, struct packet_data, list); | |
217 | *list_read_count += newpacket->length; | |
218 | ||
219 | if (*list_read_count > bytes_read) { | |
220 | /* point to the start of unread data */ | |
221 | j = newpacket->length - (*list_read_count - bytes_read); | |
222 | /* point to the offset in the packet buffer */ | |
223 | ptemp_buf = (u8 *) newpacket->data + j; | |
224 | /* | |
225 | * check if there is enough room in | |
226 | * * the incoming buffer | |
227 | */ | |
228 | if (length > (*list_read_count - bytes_read)) | |
229 | /* | |
230 | * copy what ever is there in this | |
231 | * packet and move on | |
232 | */ | |
233 | bytes_copied = (*list_read_count - bytes_read); | |
234 | else | |
235 | /* copy the remaining */ | |
236 | bytes_copied = length; | |
237 | memcpy(data, ptemp_buf, bytes_copied); | |
238 | } | |
239 | return bytes_copied; | |
240 | } | |
241 | ||
242 | static int packet_read_list(char *data, size_t * pread_length) | |
243 | { | |
244 | struct list_head *ptemp_list; | |
245 | int temp_count = 0; | |
246 | int bytes_copied = 0; | |
247 | int bytes_read = 0; | |
248 | int remaining_bytes = 0; | |
249 | char *pdest = data; | |
250 | ||
251 | /* check if we have any packets */ | |
252 | if (0 == rbu_data.num_packets) | |
253 | return -ENOMEM; | |
254 | ||
255 | remaining_bytes = *pread_length; | |
256 | bytes_read = rbu_data.packet_read_count; | |
257 | ||
258 | ptemp_list = (&packet_data_head.list)->next; | |
259 | while (!list_empty(ptemp_list)) { | |
260 | bytes_copied = do_packet_read(pdest, ptemp_list, | |
261 | remaining_bytes, bytes_read, | |
262 | &temp_count); | |
263 | remaining_bytes -= bytes_copied; | |
264 | bytes_read += bytes_copied; | |
265 | pdest += bytes_copied; | |
266 | /* | |
267 | * check if we reached end of buffer before reaching the | |
268 | * last packet | |
269 | */ | |
270 | if (remaining_bytes == 0) | |
271 | break; | |
272 | ||
273 | ptemp_list = ptemp_list->next; | |
274 | } | |
275 | /*finally set the bytes read */ | |
276 | *pread_length = bytes_read - rbu_data.packet_read_count; | |
277 | rbu_data.packet_read_count = bytes_read; | |
278 | return 0; | |
279 | } | |
280 | ||
281 | static void packet_empty_list(void) | |
282 | { | |
283 | struct list_head *ptemp_list; | |
284 | struct list_head *pnext_list; | |
285 | struct packet_data *newpacket; | |
286 | ||
287 | ptemp_list = (&packet_data_head.list)->next; | |
288 | while (!list_empty(ptemp_list)) { | |
289 | newpacket = | |
290 | list_entry(ptemp_list, struct packet_data, list); | |
291 | pnext_list = ptemp_list->next; | |
292 | list_del(ptemp_list); | |
293 | ptemp_list = pnext_list; | |
294 | /* | |
295 | * zero out the RBU packet memory before freeing | |
296 | * to make sure there are no stale RBU packets left in memory | |
297 | */ | |
298 | memset(newpacket->data, 0, rbu_data.packetsize); | |
299 | free_pages((unsigned long)newpacket->data, | |
300 | newpacket->ordernum); | |
301 | kfree(newpacket); | |
302 | } | |
303 | rbu_data.packet_write_count = 0; | |
304 | rbu_data.packet_read_count = 0; | |
305 | rbu_data.num_packets = 0; | |
306 | rbu_data.packetsize = 0; | |
307 | } | |
308 | ||
309 | /* | |
310 | * img_update_free: Frees the buffer allocated for storing BIOS image | |
311 | * Always called with lock held and returned with lock held | |
312 | */ | |
313 | static void img_update_free(void) | |
314 | { | |
315 | if (!rbu_data.image_update_buffer) | |
316 | return; | |
317 | /* | |
318 | * zero out this buffer before freeing it to get rid of any stale | |
319 | * BIOS image copied in memory. | |
320 | */ | |
321 | memset(rbu_data.image_update_buffer, 0, | |
322 | rbu_data.image_update_buffer_size); | |
323 | if (rbu_data.dma_alloc == 1) | |
324 | dma_free_coherent(NULL, rbu_data.bios_image_size, | |
325 | rbu_data.image_update_buffer, | |
326 | dell_rbu_dmaaddr); | |
327 | else | |
328 | free_pages((unsigned long)rbu_data.image_update_buffer, | |
329 | rbu_data.image_update_ordernum); | |
330 | ||
331 | /* | |
332 | * Re-initialize the rbu_data variables after a free | |
333 | */ | |
334 | rbu_data.image_update_ordernum = -1; | |
335 | rbu_data.image_update_buffer = NULL; | |
336 | rbu_data.image_update_buffer_size = 0; | |
337 | rbu_data.bios_image_size = 0; | |
338 | rbu_data.dma_alloc = 0; | |
339 | } | |
340 | ||
341 | /* | |
342 | * img_update_realloc: This function allocates the contiguous pages to | |
343 | * accommodate the requested size of data. The memory address and size | |
344 | * values are stored globally and on every call to this function the new | |
345 | * size is checked to see if more data is required than the existing size. | |
346 | * If true the previous memory is freed and new allocation is done to | |
347 | * accommodate the new size. If the incoming size is less then than the | |
348 | * already allocated size, then that memory is reused. This function is | |
349 | * called with lock held and returns with lock held. | |
350 | */ | |
351 | static int img_update_realloc(unsigned long size) | |
352 | { | |
353 | unsigned char *image_update_buffer = NULL; | |
354 | unsigned long rc; | |
355 | unsigned long img_buf_phys_addr; | |
356 | int ordernum; | |
357 | int dma_alloc = 0; | |
358 | ||
359 | /* | |
360 | * check if the buffer of sufficient size has been | |
361 | * already allocated | |
362 | */ | |
363 | if (rbu_data.image_update_buffer_size >= size) { | |
364 | /* | |
365 | * check for corruption | |
366 | */ | |
367 | if ((size != 0) && (rbu_data.image_update_buffer == NULL)) { | |
368 | printk(KERN_ERR "dell_rbu:%s: corruption " | |
369 | "check failed\n", __FUNCTION__); | |
370 | return -EINVAL; | |
371 | } | |
372 | /* | |
373 | * we have a valid pre-allocated buffer with | |
374 | * sufficient size | |
375 | */ | |
376 | return 0; | |
377 | } | |
378 | ||
379 | /* | |
380 | * free any previously allocated buffer | |
381 | */ | |
382 | img_update_free(); | |
383 | ||
384 | spin_unlock(&rbu_data.lock); | |
385 | ||
386 | ordernum = get_order(size); | |
387 | image_update_buffer = | |
388 | (unsigned char *)__get_free_pages(GFP_KERNEL, ordernum); | |
389 | ||
390 | img_buf_phys_addr = | |
391 | (unsigned long)virt_to_phys(image_update_buffer); | |
392 | ||
393 | if (img_buf_phys_addr > BIOS_SCAN_LIMIT) { | |
394 | free_pages((unsigned long)image_update_buffer, ordernum); | |
395 | ordernum = -1; | |
396 | image_update_buffer = dma_alloc_coherent(NULL, size, | |
397 | &dell_rbu_dmaaddr, | |
398 | GFP_KERNEL); | |
399 | dma_alloc = 1; | |
400 | } | |
401 | ||
402 | spin_lock(&rbu_data.lock); | |
403 | ||
404 | if (image_update_buffer != NULL) { | |
405 | rbu_data.image_update_buffer = image_update_buffer; | |
406 | rbu_data.image_update_buffer_size = size; | |
407 | rbu_data.bios_image_size = | |
408 | rbu_data.image_update_buffer_size; | |
409 | rbu_data.image_update_ordernum = ordernum; | |
410 | rbu_data.dma_alloc = dma_alloc; | |
411 | rc = 0; | |
412 | } else { | |
413 | pr_debug("Not enough memory for image update:" | |
414 | "size = %ld\n", size); | |
415 | rc = -ENOMEM; | |
416 | } | |
417 | ||
418 | return rc; | |
419 | } | |
420 | ||
421 | static ssize_t read_packet_data(char *buffer, loff_t pos, size_t count) | |
422 | { | |
423 | int retval; | |
424 | size_t bytes_left; | |
425 | size_t data_length; | |
426 | char *ptempBuf = buffer; | |
427 | unsigned long imagesize; | |
428 | ||
429 | /* check to see if we have something to return */ | |
430 | if (rbu_data.num_packets == 0) { | |
431 | pr_debug("read_packet_data: no packets written\n"); | |
432 | retval = -ENOMEM; | |
433 | goto read_rbu_data_exit; | |
434 | } | |
435 | ||
436 | imagesize = rbu_data.num_packets * rbu_data.packetsize; | |
437 | ||
438 | if (pos > imagesize) { | |
439 | retval = 0; | |
440 | printk(KERN_WARNING "dell_rbu:read_packet_data: " | |
441 | "data underrun\n"); | |
442 | goto read_rbu_data_exit; | |
443 | } | |
444 | ||
445 | bytes_left = imagesize - pos; | |
446 | data_length = min(bytes_left, count); | |
447 | ||
448 | if ((retval = packet_read_list(ptempBuf, &data_length)) < 0) | |
449 | goto read_rbu_data_exit; | |
450 | ||
451 | if ((pos + count) > imagesize) { | |
452 | rbu_data.packet_read_count = 0; | |
453 | /* this was the last copy */ | |
454 | retval = bytes_left; | |
455 | } else | |
456 | retval = count; | |
457 | ||
458 | read_rbu_data_exit: | |
459 | return retval; | |
460 | } | |
461 | ||
462 | static ssize_t read_rbu_mono_data(char *buffer, loff_t pos, size_t count) | |
463 | { | |
464 | unsigned char *ptemp = NULL; | |
465 | size_t bytes_left = 0; | |
466 | size_t data_length = 0; | |
467 | ssize_t ret_count = 0; | |
468 | ||
469 | /* check to see if we have something to return */ | |
470 | if ((rbu_data.image_update_buffer == NULL) || | |
471 | (rbu_data.bios_image_size == 0)) { | |
472 | pr_debug("read_rbu_data_mono: image_update_buffer %p ," | |
473 | "bios_image_size %lu\n", | |
474 | rbu_data.image_update_buffer, | |
475 | rbu_data.bios_image_size); | |
476 | ret_count = -ENOMEM; | |
477 | goto read_rbu_data_exit; | |
478 | } | |
479 | ||
480 | if (pos > rbu_data.bios_image_size) { | |
481 | ret_count = 0; | |
482 | goto read_rbu_data_exit; | |
483 | } | |
484 | ||
485 | bytes_left = rbu_data.bios_image_size - pos; | |
486 | data_length = min(bytes_left, count); | |
487 | ||
488 | ptemp = rbu_data.image_update_buffer; | |
489 | memcpy(buffer, (ptemp + pos), data_length); | |
490 | ||
491 | if ((pos + count) > rbu_data.bios_image_size) | |
492 | /* this was the last copy */ | |
493 | ret_count = bytes_left; | |
494 | else | |
495 | ret_count = count; | |
496 | read_rbu_data_exit: | |
497 | return ret_count; | |
498 | } | |
499 | ||
500 | static ssize_t | |
501 | read_rbu_data(struct kobject *kobj, char *buffer, loff_t pos, size_t count) | |
502 | { | |
503 | ssize_t ret_count = 0; | |
504 | ||
505 | spin_lock(&rbu_data.lock); | |
506 | ||
507 | if (!strcmp(image_type, "mono")) | |
508 | ret_count = read_rbu_mono_data(buffer, pos, count); | |
509 | else if (!strcmp(image_type, "packet")) | |
510 | ret_count = read_packet_data(buffer, pos, count); | |
511 | else | |
512 | pr_debug("read_rbu_data: invalid image type specified\n"); | |
513 | ||
514 | spin_unlock(&rbu_data.lock); | |
515 | return ret_count; | |
516 | } | |
517 | ||
518 | static ssize_t | |
519 | read_rbu_image_type(struct kobject *kobj, char *buffer, loff_t pos, | |
520 | size_t count) | |
521 | { | |
522 | int size = 0; | |
523 | if (!pos) | |
524 | size = sprintf(buffer, "%s\n", image_type); | |
525 | return size; | |
526 | } | |
527 | ||
528 | static ssize_t | |
529 | write_rbu_image_type(struct kobject *kobj, char *buffer, loff_t pos, | |
530 | size_t count) | |
531 | { | |
532 | int rc = count; | |
533 | spin_lock(&rbu_data.lock); | |
534 | ||
535 | if (strlen(buffer) < MAX_IMAGE_LENGTH) | |
536 | sscanf(buffer, "%s", image_type); | |
537 | else | |
538 | printk(KERN_WARNING "dell_rbu: image_type is invalid" | |
539 | "max chars = %d, \n incoming str--%s-- \n", | |
540 | MAX_IMAGE_LENGTH, buffer); | |
541 | ||
542 | /* we must free all previous allocations */ | |
543 | packet_empty_list(); | |
544 | img_update_free(); | |
545 | ||
546 | spin_unlock(&rbu_data.lock); | |
547 | return rc; | |
548 | ||
549 | } | |
550 | ||
551 | static struct bin_attribute rbu_data_attr = { | |
552 | .attr = {.name = "data",.owner = THIS_MODULE,.mode = 0444}, | |
553 | .read = read_rbu_data, | |
554 | }; | |
555 | ||
556 | static struct bin_attribute rbu_image_type_attr = { | |
557 | .attr = {.name = "image_type",.owner = THIS_MODULE,.mode = 0644}, | |
558 | .read = read_rbu_image_type, | |
559 | .write = write_rbu_image_type, | |
560 | }; | |
561 | ||
562 | static void callbackfn_rbu(const struct firmware *fw, void *context) | |
563 | { | |
564 | int rc = 0; | |
565 | ||
566 | if (!fw || !fw->size) | |
567 | return; | |
568 | ||
569 | spin_lock(&rbu_data.lock); | |
570 | if (!strcmp(image_type, "mono")) { | |
571 | if (!img_update_realloc(fw->size)) | |
572 | memcpy(rbu_data.image_update_buffer, | |
573 | fw->data, fw->size); | |
574 | } else if (!strcmp(image_type, "packet")) { | |
575 | if (!rbu_data.packetsize) | |
576 | rbu_data.packetsize = fw->size; | |
577 | else if (rbu_data.packetsize != fw->size) { | |
578 | packet_empty_list(); | |
579 | rbu_data.packetsize = fw->size; | |
580 | } | |
581 | packetize_data(fw->data, fw->size); | |
582 | } else | |
583 | pr_debug("invalid image type specified.\n"); | |
584 | spin_unlock(&rbu_data.lock); | |
585 | ||
586 | rc = request_firmware_nowait(THIS_MODULE, FW_ACTION_NOHOTPLUG, | |
587 | "dell_rbu", &rbu_device->dev, | |
588 | &context, callbackfn_rbu); | |
589 | if (rc) | |
590 | printk(KERN_ERR | |
591 | "dell_rbu:%s request_firmware_nowait failed" | |
592 | " %d\n", __FUNCTION__, rc); | |
593 | } | |
594 | ||
595 | static int __init dcdrbu_init(void) | |
596 | { | |
597 | int rc = 0; | |
598 | spin_lock_init(&rbu_data.lock); | |
599 | ||
600 | init_packet_head(); | |
601 | rbu_device = | |
602 | platform_device_register_simple("dell_rbu", -1, NULL, 0); | |
603 | if (!rbu_device) { | |
604 | printk(KERN_ERR | |
605 | "dell_rbu:%s:platform_device_register_simple " | |
606 | "failed\n", __FUNCTION__); | |
607 | return -EIO; | |
608 | } | |
609 | ||
610 | sysfs_create_bin_file(&rbu_device->dev.kobj, &rbu_data_attr); | |
611 | sysfs_create_bin_file(&rbu_device->dev.kobj, &rbu_image_type_attr); | |
612 | ||
613 | rc = request_firmware_nowait(THIS_MODULE, FW_ACTION_NOHOTPLUG, | |
614 | "dell_rbu", &rbu_device->dev, | |
615 | &context, callbackfn_rbu); | |
616 | if (rc) | |
617 | printk(KERN_ERR "dell_rbu:%s:request_firmware_nowait" | |
618 | " failed %d\n", __FUNCTION__, rc); | |
619 | ||
620 | return rc; | |
621 | ||
622 | } | |
623 | ||
624 | static __exit void dcdrbu_exit(void) | |
625 | { | |
626 | spin_lock(&rbu_data.lock); | |
627 | packet_empty_list(); | |
628 | img_update_free(); | |
629 | spin_unlock(&rbu_data.lock); | |
630 | platform_device_unregister(rbu_device); | |
631 | } | |
632 | ||
633 | module_exit(dcdrbu_exit); | |
634 | module_init(dcdrbu_init); |