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