1 /**
2  * Marvell Bluetooth driver: debugfs related functions
3  *
4  * Copyright (C) 2009, Marvell International Ltd.
5  *
6  * This software file (the "File") is distributed by Marvell International
7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8  * (the "License").  You may use, redistribute and/or modify this File in
9  * accordance with the terms and conditions of the License, a copy of which
10  * is available by writing to the Free Software Foundation, Inc.,
11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13  *
14  *
15  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
17  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
18  * this warranty disclaimer.
19  **/
20 
21 #include <linux/debugfs.h>
22 
23 #include <net/bluetooth/bluetooth.h>
24 #include <net/bluetooth/hci_core.h>
25 
26 #include "btmrvl_drv.h"
27 
28 struct btmrvl_debugfs_data {
29 	struct dentry *root_dir, *config_dir, *status_dir;
30 
31 	/* config */
32 	struct dentry *drvdbg;
33 	struct dentry *psmode;
34 	struct dentry *pscmd;
35 	struct dentry *hsmode;
36 	struct dentry *hscmd;
37 	struct dentry *gpiogap;
38 	struct dentry *hscfgcmd;
39 
40 	/* status */
41 	struct dentry *curpsmode;
42 	struct dentry *hsstate;
43 	struct dentry *psstate;
44 	struct dentry *txdnldready;
45 };
46 
47 static int btmrvl_open_generic(struct inode *inode, struct file *file)
48 {
49 	file->private_data = inode->i_private;
50 	return 0;
51 }
52 
53 static ssize_t btmrvl_hscfgcmd_write(struct file *file,
54 					const char __user *ubuf,
55 					size_t count,
56 					loff_t *ppos)
57 {
58 	struct btmrvl_private *priv =
59 				(struct btmrvl_private *) file->private_data;
60 
61 	long result, ret;
62 	char buf[16];
63 
64 	memset(buf, 0, sizeof(buf));
65 
66 	if (copy_from_user(&buf, ubuf,
67 				min_t(size_t, sizeof(buf) - 1, count)))
68 		return -EFAULT;
69 
70 	ret = strict_strtol(buf, 10, &result);
71 
72 	priv->btmrvl_dev.hscfgcmd = result;
73 
74 	if (priv->btmrvl_dev.hscfgcmd) {
75 		btmrvl_prepare_command(priv);
76 		wake_up_interruptible(&priv->main_thread.wait_q);
77 	}
78 
79 	return count;
80 }
81 
82 static ssize_t btmrvl_hscfgcmd_read(struct file *file, char __user * userbuf,
83 				    size_t count, loff_t *ppos)
84 {
85 	struct btmrvl_private *priv =
86 				(struct btmrvl_private *) file->private_data;
87 	int ret;
88 	char buf[16];
89 
90 	ret = snprintf(buf, sizeof(buf) - 1, "%d\n",
91 			priv->btmrvl_dev.hscfgcmd);
92 
93 	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
94 }
95 
96 static const struct file_operations btmrvl_hscfgcmd_fops = {
97 	.read = btmrvl_hscfgcmd_read,
98 	.write = btmrvl_hscfgcmd_write,
99 	.open = btmrvl_open_generic,
100 };
101 
102 static ssize_t btmrvl_psmode_write(struct file *file, const char __user *ubuf,
103 				   size_t count, loff_t *ppos)
104 {
105 	struct btmrvl_private *priv =
106 				(struct btmrvl_private *) file->private_data;
107 	long result, ret;
108 	char buf[16];
109 
110 	memset(buf, 0, sizeof(buf));
111 
112 	if (copy_from_user(&buf, ubuf,
113 				min_t(size_t, sizeof(buf) - 1, count)))
114 		return -EFAULT;
115 
116 	ret = strict_strtol(buf, 10, &result);
117 
118 	priv->btmrvl_dev.psmode = result;
119 
120 	return count;
121 }
122 
123 static ssize_t btmrvl_psmode_read(struct file *file, char __user * userbuf,
124 				  size_t count, loff_t *ppos)
125 {
126 	struct btmrvl_private *priv =
127 				(struct btmrvl_private *) file->private_data;
128 	int ret;
129 	char buf[16];
130 
131 	ret = snprintf(buf, sizeof(buf) - 1, "%d\n",
132 			priv->btmrvl_dev.psmode);
133 
134 	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
135 }
136 
137 static const struct file_operations btmrvl_psmode_fops = {
138 	.read = btmrvl_psmode_read,
139 	.write = btmrvl_psmode_write,
140 	.open = btmrvl_open_generic,
141 };
142 
143 static ssize_t btmrvl_pscmd_write(struct file *file, const char __user *ubuf,
144 				  size_t count, loff_t *ppos)
145 {
146 	struct btmrvl_private *priv =
147 				(struct btmrvl_private *) file->private_data;
148 	long result, ret;
149 	char buf[16];
150 
151 	memset(buf, 0, sizeof(buf));
152 
153 	if (copy_from_user(&buf, ubuf,
154 				min_t(size_t, sizeof(buf) - 1, count)))
155 		return -EFAULT;
156 
157 	ret = strict_strtol(buf, 10, &result);
158 
159 	priv->btmrvl_dev.pscmd = result;
160 
161 	if (priv->btmrvl_dev.pscmd) {
162 		btmrvl_prepare_command(priv);
163 		wake_up_interruptible(&priv->main_thread.wait_q);
164 	}
165 
166 	return count;
167 
168 }
169 
170 static ssize_t btmrvl_pscmd_read(struct file *file, char __user * userbuf,
171 				 size_t count, loff_t *ppos)
172 {
173 	struct btmrvl_private *priv =
174 				(struct btmrvl_private *) file->private_data;
175 	int ret;
176 	char buf[16];
177 
178 	ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->btmrvl_dev.pscmd);
179 
180 	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
181 }
182 
183 static const struct file_operations btmrvl_pscmd_fops = {
184 	.read = btmrvl_pscmd_read,
185 	.write = btmrvl_pscmd_write,
186 	.open = btmrvl_open_generic,
187 };
188 
189 static ssize_t btmrvl_gpiogap_write(struct file *file, const char __user *ubuf,
190 				    size_t count, loff_t *ppos)
191 {
192 	struct btmrvl_private *priv =
193 				(struct btmrvl_private *) file->private_data;
194 	long result, ret;
195 	char buf[16];
196 
197 	memset(buf, 0, sizeof(buf));
198 
199 	if (copy_from_user(&buf, ubuf,
200 				min_t(size_t, sizeof(buf) - 1, count)))
201 		return -EFAULT;
202 
203 	ret = strict_strtol(buf, 16, &result);
204 
205 	priv->btmrvl_dev.gpio_gap = result;
206 
207 	return count;
208 }
209 
210 static ssize_t btmrvl_gpiogap_read(struct file *file, char __user * userbuf,
211 				   size_t count, loff_t *ppos)
212 {
213 	struct btmrvl_private *priv =
214 				(struct btmrvl_private *) file->private_data;
215 	int ret;
216 	char buf[16];
217 
218 	ret = snprintf(buf, sizeof(buf) - 1, "0x%x\n",
219 			priv->btmrvl_dev.gpio_gap);
220 
221 	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
222 }
223 
224 static const struct file_operations btmrvl_gpiogap_fops = {
225 	.read = btmrvl_gpiogap_read,
226 	.write = btmrvl_gpiogap_write,
227 	.open = btmrvl_open_generic,
228 };
229 
230 static ssize_t btmrvl_hscmd_write(struct file *file, const char __user *ubuf,
231 				  size_t count, loff_t *ppos)
232 {
233 	struct btmrvl_private *priv =
234 				(struct btmrvl_private *) file->private_data;
235 	long result, ret;
236 	char buf[16];
237 
238 	memset(buf, 0, sizeof(buf));
239 
240 	if (copy_from_user(&buf, ubuf,
241 				min_t(size_t, sizeof(buf) - 1, count)))
242 		return -EFAULT;
243 
244 	ret = strict_strtol(buf, 10, &result);
245 
246 	priv->btmrvl_dev.hscmd = result;
247 	if (priv->btmrvl_dev.hscmd) {
248 		btmrvl_prepare_command(priv);
249 		wake_up_interruptible(&priv->main_thread.wait_q);
250 	}
251 
252 	return count;
253 }
254 
255 static ssize_t btmrvl_hscmd_read(struct file *file, char __user * userbuf,
256 				 size_t count, loff_t *ppos)
257 {
258 	struct btmrvl_private *priv =
259 				(struct btmrvl_private *) file->private_data;
260 	int ret;
261 	char buf[16];
262 
263 	ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->btmrvl_dev.hscmd);
264 
265 	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
266 }
267 
268 static const struct file_operations btmrvl_hscmd_fops = {
269 	.read = btmrvl_hscmd_read,
270 	.write = btmrvl_hscmd_write,
271 	.open = btmrvl_open_generic,
272 };
273 
274 static ssize_t btmrvl_hsmode_write(struct file *file, const char __user *ubuf,
275 				   size_t count, loff_t *ppos)
276 {
277 	struct btmrvl_private *priv =
278 				(struct btmrvl_private *) file->private_data;
279 	long result, ret;
280 	char buf[16];
281 
282 	memset(buf, 0, sizeof(buf));
283 
284 	if (copy_from_user(&buf, ubuf,
285 				min_t(size_t, sizeof(buf) - 1, count)))
286 		return -EFAULT;
287 
288 	ret = strict_strtol(buf, 10, &result);
289 
290 	priv->btmrvl_dev.hsmode = result;
291 
292 	return count;
293 }
294 
295 static ssize_t btmrvl_hsmode_read(struct file *file, char __user * userbuf,
296 				  size_t count, loff_t *ppos)
297 {
298 	struct btmrvl_private *priv =
299 				(struct btmrvl_private *) file->private_data;
300 	int ret;
301 	char buf[16];
302 
303 	ret = snprintf(buf, sizeof(buf) - 1, "%d\n",
304 			priv->btmrvl_dev.hsmode);
305 
306 	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
307 }
308 
309 static const struct file_operations btmrvl_hsmode_fops = {
310 	.read = btmrvl_hsmode_read,
311 	.write = btmrvl_hsmode_write,
312 	.open = btmrvl_open_generic,
313 };
314 
315 static ssize_t btmrvl_curpsmode_read(struct file *file, char __user * userbuf,
316 				     size_t count, loff_t *ppos)
317 {
318 	struct btmrvl_private *priv =
319 				(struct btmrvl_private *) file->private_data;
320 	int ret;
321 	char buf[16];
322 
323 	ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->adapter->psmode);
324 
325 	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
326 }
327 
328 static const struct file_operations btmrvl_curpsmode_fops = {
329 	.read = btmrvl_curpsmode_read,
330 	.open = btmrvl_open_generic,
331 };
332 
333 static ssize_t btmrvl_psstate_read(struct file *file, char __user * userbuf,
334 				   size_t count, loff_t *ppos)
335 {
336 	struct btmrvl_private *priv =
337 				(struct btmrvl_private *) file->private_data;
338 	int ret;
339 	char buf[16];
340 
341 	ret = snprintf(buf, sizeof(buf) - 1, "%d\n",
342 			priv->adapter->ps_state);
343 
344 	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
345 }
346 
347 static const struct file_operations btmrvl_psstate_fops = {
348 	.read = btmrvl_psstate_read,
349 	.open = btmrvl_open_generic,
350 };
351 
352 static ssize_t btmrvl_hsstate_read(struct file *file, char __user * userbuf,
353 				   size_t count, loff_t *ppos)
354 {
355 	struct btmrvl_private *priv =
356 				(struct btmrvl_private *) file->private_data;
357 	int ret;
358 	char buf[16];
359 
360 	ret = snprintf(buf, sizeof(buf) - 1, "%d\n",
361 			priv->adapter->hs_state);
362 
363 	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
364 }
365 
366 static const struct file_operations btmrvl_hsstate_fops = {
367 	.read = btmrvl_hsstate_read,
368 	.open = btmrvl_open_generic,
369 };
370 
371 static ssize_t btmrvl_txdnldready_read(struct file *file, char __user * userbuf,
372 				       size_t count, loff_t *ppos)
373 {
374 	struct btmrvl_private *priv =
375 				(struct btmrvl_private *) file->private_data;
376 	int ret;
377 	char buf[16];
378 
379 	ret = snprintf(buf, sizeof(buf) - 1, "%d\n",
380 			priv->btmrvl_dev.tx_dnld_rdy);
381 
382 	return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
383 }
384 
385 static const struct file_operations btmrvl_txdnldready_fops = {
386 	.read = btmrvl_txdnldready_read,
387 	.open = btmrvl_open_generic,
388 };
389 
390 void btmrvl_debugfs_init(struct hci_dev *hdev)
391 {
392 	struct btmrvl_private *priv =
393 				(struct btmrvl_private *) hdev->driver_data;
394 	struct btmrvl_debugfs_data *dbg;
395 
396 	dbg = kzalloc(sizeof(*dbg), GFP_KERNEL);
397 	priv->debugfs_data = dbg;
398 
399 	if (!dbg) {
400 		BT_ERR("Can not allocate memory for btmrvl_debugfs_data.");
401 		return;
402 	}
403 
404 	dbg->root_dir = debugfs_create_dir("btmrvl", NULL);
405 
406 	dbg->config_dir = debugfs_create_dir("config", dbg->root_dir);
407 
408 	dbg->psmode = debugfs_create_file("psmode", 0644, dbg->config_dir,
409 					  hdev->driver_data,
410 					  &btmrvl_psmode_fops);
411 	dbg->pscmd =
412 	    debugfs_create_file("pscmd", 0644, dbg->config_dir,
413 				hdev->driver_data, &btmrvl_pscmd_fops);
414 	dbg->gpiogap =
415 	    debugfs_create_file("gpiogap", 0644, dbg->config_dir,
416 				hdev->driver_data, &btmrvl_gpiogap_fops);
417 	dbg->hsmode =
418 	    debugfs_create_file("hsmode", 0644, dbg->config_dir,
419 				hdev->driver_data, &btmrvl_hsmode_fops);
420 	dbg->hscmd =
421 	    debugfs_create_file("hscmd", 0644, dbg->config_dir,
422 				hdev->driver_data, &btmrvl_hscmd_fops);
423 	dbg->hscfgcmd =
424 	    debugfs_create_file("hscfgcmd", 0644, dbg->config_dir,
425 				hdev->driver_data, &btmrvl_hscfgcmd_fops);
426 
427 	dbg->status_dir = debugfs_create_dir("status", dbg->root_dir);
428 	dbg->curpsmode = debugfs_create_file("curpsmode", 0444,
429 						dbg->status_dir,
430 						hdev->driver_data,
431 						&btmrvl_curpsmode_fops);
432 	dbg->psstate =
433 	    debugfs_create_file("psstate", 0444, dbg->status_dir,
434 				hdev->driver_data, &btmrvl_psstate_fops);
435 	dbg->hsstate =
436 	    debugfs_create_file("hsstate", 0444, dbg->status_dir,
437 				hdev->driver_data, &btmrvl_hsstate_fops);
438 	dbg->txdnldready =
439 	    debugfs_create_file("txdnldready", 0444, dbg->status_dir,
440 				hdev->driver_data, &btmrvl_txdnldready_fops);
441 }
442 
443 void btmrvl_debugfs_remove(struct hci_dev *hdev)
444 {
445 	struct btmrvl_private *priv =
446 				(struct btmrvl_private *) hdev->driver_data;
447 	struct btmrvl_debugfs_data *dbg = priv->debugfs_data;
448 
449 	if (!dbg)
450 		return;
451 
452 	debugfs_remove(dbg->psmode);
453 	debugfs_remove(dbg->pscmd);
454 	debugfs_remove(dbg->gpiogap);
455 	debugfs_remove(dbg->hsmode);
456 	debugfs_remove(dbg->hscmd);
457 	debugfs_remove(dbg->hscfgcmd);
458 	debugfs_remove(dbg->config_dir);
459 
460 	debugfs_remove(dbg->curpsmode);
461 	debugfs_remove(dbg->psstate);
462 	debugfs_remove(dbg->hsstate);
463 	debugfs_remove(dbg->txdnldready);
464 	debugfs_remove(dbg->status_dir);
465 
466 	debugfs_remove(dbg->root_dir);
467 
468 	kfree(dbg);
469 }
470