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