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1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Sample in-kernel QMI client driver | |
4 | * | |
5 | * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved. | |
6 | * Copyright (C) 2017 Linaro Ltd. | |
7 | */ | |
8 | #include <linux/kernel.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/debugfs.h> | |
11 | #include <linux/device.h> | |
12 | #include <linux/platform_device.h> | |
13 | #include <linux/qrtr.h> | |
14 | #include <linux/net.h> | |
15 | #include <linux/completion.h> | |
16 | #include <linux/idr.h> | |
17 | #include <linux/string.h> | |
18 | #include <net/sock.h> | |
19 | #include <linux/soc/qcom/qmi.h> | |
20 | ||
21 | #define PING_REQ1_TLV_TYPE 0x1 | |
22 | #define PING_RESP1_TLV_TYPE 0x2 | |
23 | #define PING_OPT1_TLV_TYPE 0x10 | |
24 | #define PING_OPT2_TLV_TYPE 0x11 | |
25 | ||
26 | #define DATA_REQ1_TLV_TYPE 0x1 | |
27 | #define DATA_RESP1_TLV_TYPE 0x2 | |
28 | #define DATA_OPT1_TLV_TYPE 0x10 | |
29 | #define DATA_OPT2_TLV_TYPE 0x11 | |
30 | ||
31 | #define TEST_MED_DATA_SIZE_V01 8192 | |
32 | #define TEST_MAX_NAME_SIZE_V01 255 | |
33 | ||
34 | #define TEST_PING_REQ_MSG_ID_V01 0x20 | |
35 | #define TEST_DATA_REQ_MSG_ID_V01 0x21 | |
36 | ||
37 | #define TEST_PING_REQ_MAX_MSG_LEN_V01 266 | |
38 | #define TEST_DATA_REQ_MAX_MSG_LEN_V01 8456 | |
39 | ||
40 | struct test_name_type_v01 { | |
41 | u32 name_len; | |
42 | char name[TEST_MAX_NAME_SIZE_V01]; | |
43 | }; | |
44 | ||
45 | static struct qmi_elem_info test_name_type_v01_ei[] = { | |
46 | { | |
47 | .data_type = QMI_DATA_LEN, | |
48 | .elem_len = 1, | |
49 | .elem_size = sizeof(u8), | |
50 | .array_type = NO_ARRAY, | |
51 | .tlv_type = QMI_COMMON_TLV_TYPE, | |
52 | .offset = offsetof(struct test_name_type_v01, | |
53 | name_len), | |
54 | }, | |
55 | { | |
56 | .data_type = QMI_UNSIGNED_1_BYTE, | |
57 | .elem_len = TEST_MAX_NAME_SIZE_V01, | |
58 | .elem_size = sizeof(char), | |
59 | .array_type = VAR_LEN_ARRAY, | |
60 | .tlv_type = QMI_COMMON_TLV_TYPE, | |
61 | .offset = offsetof(struct test_name_type_v01, | |
62 | name), | |
63 | }, | |
64 | {} | |
65 | }; | |
66 | ||
67 | struct test_ping_req_msg_v01 { | |
68 | char ping[4]; | |
69 | ||
70 | u8 client_name_valid; | |
71 | struct test_name_type_v01 client_name; | |
72 | }; | |
73 | ||
74 | static struct qmi_elem_info test_ping_req_msg_v01_ei[] = { | |
75 | { | |
76 | .data_type = QMI_UNSIGNED_1_BYTE, | |
77 | .elem_len = 4, | |
78 | .elem_size = sizeof(char), | |
79 | .array_type = STATIC_ARRAY, | |
80 | .tlv_type = PING_REQ1_TLV_TYPE, | |
81 | .offset = offsetof(struct test_ping_req_msg_v01, | |
82 | ping), | |
83 | }, | |
84 | { | |
85 | .data_type = QMI_OPT_FLAG, | |
86 | .elem_len = 1, | |
87 | .elem_size = sizeof(u8), | |
88 | .array_type = NO_ARRAY, | |
89 | .tlv_type = PING_OPT1_TLV_TYPE, | |
90 | .offset = offsetof(struct test_ping_req_msg_v01, | |
91 | client_name_valid), | |
92 | }, | |
93 | { | |
94 | .data_type = QMI_STRUCT, | |
95 | .elem_len = 1, | |
96 | .elem_size = sizeof(struct test_name_type_v01), | |
97 | .array_type = NO_ARRAY, | |
98 | .tlv_type = PING_OPT1_TLV_TYPE, | |
99 | .offset = offsetof(struct test_ping_req_msg_v01, | |
100 | client_name), | |
101 | .ei_array = test_name_type_v01_ei, | |
102 | }, | |
103 | {} | |
104 | }; | |
105 | ||
106 | struct test_ping_resp_msg_v01 { | |
107 | struct qmi_response_type_v01 resp; | |
108 | ||
109 | u8 pong_valid; | |
110 | char pong[4]; | |
111 | ||
112 | u8 service_name_valid; | |
113 | struct test_name_type_v01 service_name; | |
114 | }; | |
115 | ||
116 | static struct qmi_elem_info test_ping_resp_msg_v01_ei[] = { | |
117 | { | |
118 | .data_type = QMI_STRUCT, | |
119 | .elem_len = 1, | |
120 | .elem_size = sizeof(struct qmi_response_type_v01), | |
121 | .array_type = NO_ARRAY, | |
122 | .tlv_type = PING_RESP1_TLV_TYPE, | |
123 | .offset = offsetof(struct test_ping_resp_msg_v01, | |
124 | resp), | |
125 | .ei_array = qmi_response_type_v01_ei, | |
126 | }, | |
127 | { | |
128 | .data_type = QMI_OPT_FLAG, | |
129 | .elem_len = 1, | |
130 | .elem_size = sizeof(u8), | |
131 | .array_type = NO_ARRAY, | |
132 | .tlv_type = PING_OPT1_TLV_TYPE, | |
133 | .offset = offsetof(struct test_ping_resp_msg_v01, | |
134 | pong_valid), | |
135 | }, | |
136 | { | |
137 | .data_type = QMI_UNSIGNED_1_BYTE, | |
138 | .elem_len = 4, | |
139 | .elem_size = sizeof(char), | |
140 | .array_type = STATIC_ARRAY, | |
141 | .tlv_type = PING_OPT1_TLV_TYPE, | |
142 | .offset = offsetof(struct test_ping_resp_msg_v01, | |
143 | pong), | |
144 | }, | |
145 | { | |
146 | .data_type = QMI_OPT_FLAG, | |
147 | .elem_len = 1, | |
148 | .elem_size = sizeof(u8), | |
149 | .array_type = NO_ARRAY, | |
150 | .tlv_type = PING_OPT2_TLV_TYPE, | |
151 | .offset = offsetof(struct test_ping_resp_msg_v01, | |
152 | service_name_valid), | |
153 | }, | |
154 | { | |
155 | .data_type = QMI_STRUCT, | |
156 | .elem_len = 1, | |
157 | .elem_size = sizeof(struct test_name_type_v01), | |
158 | .array_type = NO_ARRAY, | |
159 | .tlv_type = PING_OPT2_TLV_TYPE, | |
160 | .offset = offsetof(struct test_ping_resp_msg_v01, | |
161 | service_name), | |
162 | .ei_array = test_name_type_v01_ei, | |
163 | }, | |
164 | {} | |
165 | }; | |
166 | ||
167 | struct test_data_req_msg_v01 { | |
168 | u32 data_len; | |
169 | u8 data[TEST_MED_DATA_SIZE_V01]; | |
170 | ||
171 | u8 client_name_valid; | |
172 | struct test_name_type_v01 client_name; | |
173 | }; | |
174 | ||
175 | static struct qmi_elem_info test_data_req_msg_v01_ei[] = { | |
176 | { | |
177 | .data_type = QMI_DATA_LEN, | |
178 | .elem_len = 1, | |
179 | .elem_size = sizeof(u32), | |
180 | .array_type = NO_ARRAY, | |
181 | .tlv_type = DATA_REQ1_TLV_TYPE, | |
182 | .offset = offsetof(struct test_data_req_msg_v01, | |
183 | data_len), | |
184 | }, | |
185 | { | |
186 | .data_type = QMI_UNSIGNED_1_BYTE, | |
187 | .elem_len = TEST_MED_DATA_SIZE_V01, | |
188 | .elem_size = sizeof(u8), | |
189 | .array_type = VAR_LEN_ARRAY, | |
190 | .tlv_type = DATA_REQ1_TLV_TYPE, | |
191 | .offset = offsetof(struct test_data_req_msg_v01, | |
192 | data), | |
193 | }, | |
194 | { | |
195 | .data_type = QMI_OPT_FLAG, | |
196 | .elem_len = 1, | |
197 | .elem_size = sizeof(u8), | |
198 | .array_type = NO_ARRAY, | |
199 | .tlv_type = DATA_OPT1_TLV_TYPE, | |
200 | .offset = offsetof(struct test_data_req_msg_v01, | |
201 | client_name_valid), | |
202 | }, | |
203 | { | |
204 | .data_type = QMI_STRUCT, | |
205 | .elem_len = 1, | |
206 | .elem_size = sizeof(struct test_name_type_v01), | |
207 | .array_type = NO_ARRAY, | |
208 | .tlv_type = DATA_OPT1_TLV_TYPE, | |
209 | .offset = offsetof(struct test_data_req_msg_v01, | |
210 | client_name), | |
211 | .ei_array = test_name_type_v01_ei, | |
212 | }, | |
213 | {} | |
214 | }; | |
215 | ||
216 | struct test_data_resp_msg_v01 { | |
217 | struct qmi_response_type_v01 resp; | |
218 | ||
219 | u8 data_valid; | |
220 | u32 data_len; | |
221 | u8 data[TEST_MED_DATA_SIZE_V01]; | |
222 | ||
223 | u8 service_name_valid; | |
224 | struct test_name_type_v01 service_name; | |
225 | }; | |
226 | ||
227 | static struct qmi_elem_info test_data_resp_msg_v01_ei[] = { | |
228 | { | |
229 | .data_type = QMI_STRUCT, | |
230 | .elem_len = 1, | |
231 | .elem_size = sizeof(struct qmi_response_type_v01), | |
232 | .array_type = NO_ARRAY, | |
233 | .tlv_type = DATA_RESP1_TLV_TYPE, | |
234 | .offset = offsetof(struct test_data_resp_msg_v01, | |
235 | resp), | |
236 | .ei_array = qmi_response_type_v01_ei, | |
237 | }, | |
238 | { | |
239 | .data_type = QMI_OPT_FLAG, | |
240 | .elem_len = 1, | |
241 | .elem_size = sizeof(u8), | |
242 | .array_type = NO_ARRAY, | |
243 | .tlv_type = DATA_OPT1_TLV_TYPE, | |
244 | .offset = offsetof(struct test_data_resp_msg_v01, | |
245 | data_valid), | |
246 | }, | |
247 | { | |
248 | .data_type = QMI_DATA_LEN, | |
249 | .elem_len = 1, | |
250 | .elem_size = sizeof(u32), | |
251 | .array_type = NO_ARRAY, | |
252 | .tlv_type = DATA_OPT1_TLV_TYPE, | |
253 | .offset = offsetof(struct test_data_resp_msg_v01, | |
254 | data_len), | |
255 | }, | |
256 | { | |
257 | .data_type = QMI_UNSIGNED_1_BYTE, | |
258 | .elem_len = TEST_MED_DATA_SIZE_V01, | |
259 | .elem_size = sizeof(u8), | |
260 | .array_type = VAR_LEN_ARRAY, | |
261 | .tlv_type = DATA_OPT1_TLV_TYPE, | |
262 | .offset = offsetof(struct test_data_resp_msg_v01, | |
263 | data), | |
264 | }, | |
265 | { | |
266 | .data_type = QMI_OPT_FLAG, | |
267 | .elem_len = 1, | |
268 | .elem_size = sizeof(u8), | |
269 | .array_type = NO_ARRAY, | |
270 | .tlv_type = DATA_OPT2_TLV_TYPE, | |
271 | .offset = offsetof(struct test_data_resp_msg_v01, | |
272 | service_name_valid), | |
273 | }, | |
274 | { | |
275 | .data_type = QMI_STRUCT, | |
276 | .elem_len = 1, | |
277 | .elem_size = sizeof(struct test_name_type_v01), | |
278 | .array_type = NO_ARRAY, | |
279 | .tlv_type = DATA_OPT2_TLV_TYPE, | |
280 | .offset = offsetof(struct test_data_resp_msg_v01, | |
281 | service_name), | |
282 | .ei_array = test_name_type_v01_ei, | |
283 | }, | |
284 | {} | |
285 | }; | |
286 | ||
287 | /* | |
288 | * ping_write() - ping_pong debugfs file write handler | |
289 | * @file: debugfs file context | |
290 | * @user_buf: reference to the user data (ignored) | |
291 | * @count: number of bytes in @user_buf | |
292 | * @ppos: offset in @file to write | |
293 | * | |
294 | * This function allows user space to send out a ping_pong QMI encoded message | |
295 | * to the associated remote test service and will return with the result of the | |
296 | * transaction. It serves as an example of how to provide a custom response | |
297 | * handler. | |
298 | * | |
299 | * Return: @count, or negative errno on failure. | |
300 | */ | |
301 | static ssize_t ping_write(struct file *file, const char __user *user_buf, | |
302 | size_t count, loff_t *ppos) | |
303 | { | |
304 | struct qmi_handle *qmi = file->private_data; | |
305 | struct test_ping_req_msg_v01 req = {}; | |
306 | struct qmi_txn txn; | |
307 | int ret; | |
308 | ||
309 | memcpy(req.ping, "ping", sizeof(req.ping)); | |
310 | ||
311 | ret = qmi_txn_init(qmi, &txn, NULL, NULL); | |
312 | if (ret < 0) | |
313 | return ret; | |
314 | ||
315 | ret = qmi_send_request(qmi, NULL, &txn, | |
316 | TEST_PING_REQ_MSG_ID_V01, | |
317 | TEST_PING_REQ_MAX_MSG_LEN_V01, | |
318 | test_ping_req_msg_v01_ei, &req); | |
319 | if (ret < 0) { | |
320 | qmi_txn_cancel(&txn); | |
321 | return ret; | |
322 | } | |
323 | ||
324 | ret = qmi_txn_wait(&txn, 5 * HZ); | |
325 | if (ret < 0) | |
326 | count = ret; | |
327 | ||
328 | return count; | |
329 | } | |
330 | ||
331 | static const struct file_operations ping_fops = { | |
332 | .open = simple_open, | |
333 | .write = ping_write, | |
334 | }; | |
335 | ||
336 | static void ping_pong_cb(struct qmi_handle *qmi, struct sockaddr_qrtr *sq, | |
337 | struct qmi_txn *txn, const void *data) | |
338 | { | |
339 | const struct test_ping_resp_msg_v01 *resp = data; | |
340 | ||
341 | if (!txn) { | |
342 | pr_err("spurious ping response\n"); | |
343 | return; | |
344 | } | |
345 | ||
346 | if (resp->resp.result == QMI_RESULT_FAILURE_V01) | |
347 | txn->result = -ENXIO; | |
348 | else if (!resp->pong_valid || memcmp(resp->pong, "pong", 4)) | |
349 | txn->result = -EINVAL; | |
350 | ||
351 | complete(&txn->completion); | |
352 | } | |
353 | ||
354 | /* | |
355 | * data_write() - data debugfs file write handler | |
356 | * @file: debugfs file context | |
357 | * @user_buf: reference to the user data | |
358 | * @count: number of bytes in @user_buf | |
359 | * @ppos: offset in @file to write | |
360 | * | |
361 | * This function allows user space to send out a data QMI encoded message to | |
362 | * the associated remote test service and will return with the result of the | |
363 | * transaction. It serves as an example of how to have the QMI helpers decode a | |
364 | * transaction response into a provided object automatically. | |
365 | * | |
366 | * Return: @count, or negative errno on failure. | |
367 | */ | |
368 | static ssize_t data_write(struct file *file, const char __user *user_buf, | |
369 | size_t count, loff_t *ppos) | |
370 | ||
371 | { | |
372 | struct qmi_handle *qmi = file->private_data; | |
373 | struct test_data_resp_msg_v01 *resp; | |
374 | struct test_data_req_msg_v01 *req; | |
375 | struct qmi_txn txn; | |
376 | int ret; | |
377 | ||
378 | req = kzalloc(sizeof(*req), GFP_KERNEL); | |
379 | if (!req) | |
380 | return -ENOMEM; | |
381 | ||
382 | resp = kzalloc(sizeof(*resp), GFP_KERNEL); | |
383 | if (!resp) { | |
384 | kfree(req); | |
385 | return -ENOMEM; | |
386 | } | |
387 | ||
388 | req->data_len = min_t(size_t, sizeof(req->data), count); | |
389 | if (copy_from_user(req->data, user_buf, req->data_len)) { | |
390 | ret = -EFAULT; | |
391 | goto out; | |
392 | } | |
393 | ||
394 | ret = qmi_txn_init(qmi, &txn, test_data_resp_msg_v01_ei, resp); | |
395 | if (ret < 0) | |
396 | goto out; | |
397 | ||
398 | ret = qmi_send_request(qmi, NULL, &txn, | |
399 | TEST_DATA_REQ_MSG_ID_V01, | |
400 | TEST_DATA_REQ_MAX_MSG_LEN_V01, | |
401 | test_data_req_msg_v01_ei, req); | |
402 | if (ret < 0) { | |
403 | qmi_txn_cancel(&txn); | |
404 | goto out; | |
405 | } | |
406 | ||
407 | ret = qmi_txn_wait(&txn, 5 * HZ); | |
408 | if (ret < 0) { | |
409 | goto out; | |
410 | } else if (!resp->data_valid || | |
411 | resp->data_len != req->data_len || | |
412 | memcmp(resp->data, req->data, req->data_len)) { | |
413 | pr_err("response data doesn't match expectation\n"); | |
414 | ret = -EINVAL; | |
415 | goto out; | |
416 | } | |
417 | ||
418 | ret = count; | |
419 | ||
420 | out: | |
421 | kfree(resp); | |
422 | kfree(req); | |
423 | ||
424 | return ret; | |
425 | } | |
426 | ||
427 | static const struct file_operations data_fops = { | |
428 | .open = simple_open, | |
429 | .write = data_write, | |
430 | }; | |
431 | ||
432 | static struct qmi_msg_handler qmi_sample_handlers[] = { | |
433 | { | |
434 | .type = QMI_RESPONSE, | |
435 | .msg_id = TEST_PING_REQ_MSG_ID_V01, | |
436 | .ei = test_ping_resp_msg_v01_ei, | |
437 | .decoded_size = sizeof(struct test_ping_req_msg_v01), | |
438 | .fn = ping_pong_cb | |
439 | }, | |
440 | {} | |
441 | }; | |
442 | ||
443 | struct qmi_sample { | |
444 | struct qmi_handle qmi; | |
445 | ||
446 | struct dentry *de_dir; | |
447 | struct dentry *de_data; | |
448 | struct dentry *de_ping; | |
449 | }; | |
450 | ||
451 | static struct dentry *qmi_debug_dir; | |
452 | ||
453 | static int qmi_sample_probe(struct platform_device *pdev) | |
454 | { | |
455 | struct sockaddr_qrtr *sq; | |
456 | struct qmi_sample *sample; | |
457 | char path[20]; | |
458 | int ret; | |
459 | ||
460 | sample = devm_kzalloc(&pdev->dev, sizeof(*sample), GFP_KERNEL); | |
461 | if (!sample) | |
462 | return -ENOMEM; | |
463 | ||
464 | ret = qmi_handle_init(&sample->qmi, TEST_DATA_REQ_MAX_MSG_LEN_V01, | |
465 | NULL, | |
466 | qmi_sample_handlers); | |
467 | if (ret < 0) | |
468 | return ret; | |
469 | ||
470 | sq = dev_get_platdata(&pdev->dev); | |
471 | ret = kernel_connect(sample->qmi.sock, (struct sockaddr *)sq, | |
472 | sizeof(*sq), 0); | |
473 | if (ret < 0) { | |
474 | pr_err("failed to connect to remote service port\n"); | |
475 | goto err_release_qmi_handle; | |
476 | } | |
477 | ||
478 | snprintf(path, sizeof(path), "%d:%d", sq->sq_node, sq->sq_port); | |
479 | ||
480 | sample->de_dir = debugfs_create_dir(path, qmi_debug_dir); | |
481 | if (IS_ERR(sample->de_dir)) { | |
482 | ret = PTR_ERR(sample->de_dir); | |
483 | goto err_release_qmi_handle; | |
484 | } | |
485 | ||
486 | sample->de_data = debugfs_create_file("data", 0600, sample->de_dir, | |
487 | sample, &data_fops); | |
488 | if (IS_ERR(sample->de_data)) { | |
489 | ret = PTR_ERR(sample->de_data); | |
490 | goto err_remove_de_dir; | |
491 | } | |
492 | ||
493 | sample->de_ping = debugfs_create_file("ping", 0600, sample->de_dir, | |
494 | sample, &ping_fops); | |
495 | if (IS_ERR(sample->de_ping)) { | |
496 | ret = PTR_ERR(sample->de_ping); | |
497 | goto err_remove_de_data; | |
498 | } | |
499 | ||
500 | platform_set_drvdata(pdev, sample); | |
501 | ||
502 | return 0; | |
503 | ||
504 | err_remove_de_data: | |
505 | debugfs_remove(sample->de_data); | |
506 | err_remove_de_dir: | |
507 | debugfs_remove(sample->de_dir); | |
508 | err_release_qmi_handle: | |
509 | qmi_handle_release(&sample->qmi); | |
510 | ||
511 | return ret; | |
512 | } | |
513 | ||
514 | static int qmi_sample_remove(struct platform_device *pdev) | |
515 | { | |
516 | struct qmi_sample *sample = platform_get_drvdata(pdev); | |
517 | ||
518 | debugfs_remove(sample->de_ping); | |
519 | debugfs_remove(sample->de_data); | |
520 | debugfs_remove(sample->de_dir); | |
521 | ||
522 | qmi_handle_release(&sample->qmi); | |
523 | ||
524 | return 0; | |
525 | } | |
526 | ||
527 | static struct platform_driver qmi_sample_driver = { | |
528 | .probe = qmi_sample_probe, | |
529 | .remove = qmi_sample_remove, | |
530 | .driver = { | |
531 | .name = "qmi_sample_client", | |
532 | }, | |
533 | }; | |
534 | ||
535 | static int qmi_sample_new_server(struct qmi_handle *qmi, | |
536 | struct qmi_service *service) | |
537 | { | |
538 | struct platform_device *pdev; | |
539 | struct sockaddr_qrtr sq = { AF_QIPCRTR, service->node, service->port }; | |
540 | int ret; | |
541 | ||
542 | pdev = platform_device_alloc("qmi_sample_client", PLATFORM_DEVID_AUTO); | |
543 | if (!pdev) | |
544 | return -ENOMEM; | |
545 | ||
546 | ret = platform_device_add_data(pdev, &sq, sizeof(sq)); | |
547 | if (ret) | |
548 | goto err_put_device; | |
549 | ||
550 | ret = platform_device_add(pdev); | |
551 | if (ret) | |
552 | goto err_put_device; | |
553 | ||
554 | service->priv = pdev; | |
555 | ||
556 | return 0; | |
557 | ||
558 | err_put_device: | |
559 | platform_device_put(pdev); | |
560 | ||
561 | return ret; | |
562 | } | |
563 | ||
564 | static void qmi_sample_del_server(struct qmi_handle *qmi, | |
565 | struct qmi_service *service) | |
566 | { | |
567 | struct platform_device *pdev = service->priv; | |
568 | ||
569 | platform_device_unregister(pdev); | |
570 | } | |
571 | ||
572 | static struct qmi_handle lookup_client; | |
573 | ||
574 | static struct qmi_ops lookup_ops = { | |
575 | .new_server = qmi_sample_new_server, | |
576 | .del_server = qmi_sample_del_server, | |
577 | }; | |
578 | ||
579 | static int qmi_sample_init(void) | |
580 | { | |
581 | int ret; | |
582 | ||
583 | qmi_debug_dir = debugfs_create_dir("qmi_sample", NULL); | |
584 | if (IS_ERR(qmi_debug_dir)) { | |
585 | pr_err("failed to create qmi_sample dir\n"); | |
586 | return PTR_ERR(qmi_debug_dir); | |
587 | } | |
588 | ||
589 | ret = platform_driver_register(&qmi_sample_driver); | |
590 | if (ret) | |
591 | goto err_remove_debug_dir; | |
592 | ||
593 | ret = qmi_handle_init(&lookup_client, 0, &lookup_ops, NULL); | |
594 | if (ret < 0) | |
595 | goto err_unregister_driver; | |
596 | ||
597 | qmi_add_lookup(&lookup_client, 15, 0, 0); | |
598 | ||
599 | return 0; | |
600 | ||
601 | err_unregister_driver: | |
602 | platform_driver_unregister(&qmi_sample_driver); | |
603 | err_remove_debug_dir: | |
604 | debugfs_remove(qmi_debug_dir); | |
605 | ||
606 | return ret; | |
607 | } | |
608 | ||
609 | static void qmi_sample_exit(void) | |
610 | { | |
611 | qmi_handle_release(&lookup_client); | |
612 | ||
613 | platform_driver_unregister(&qmi_sample_driver); | |
614 | ||
615 | debugfs_remove(qmi_debug_dir); | |
616 | } | |
617 | ||
618 | module_init(qmi_sample_init); | |
619 | module_exit(qmi_sample_exit); | |
620 | ||
621 | MODULE_DESCRIPTION("Sample QMI client driver"); | |
622 | MODULE_LICENSE("GPL v2"); |