summaryrefslogtreecommitdiffstats
path: root/drivers/usb/chipidea/debug.c
blob: dfb05edcdb96dbbb3b794d6faf5c799b3c031f06 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/uaccess.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/phy.h>
#include <linux/usb/otg.h>
#include <linux/usb/otg-fsm.h>

#include "ci.h"
#include "udc.h"
#include "bits.h"
#include "debug.h"
#include "otg.h"

/**
 * ci_device_show: prints information about device capabilities and status
 */
static int ci_device_show(struct seq_file *s, void *data)
{
	struct ci_hdrc *ci = s->private;
	struct usb_gadget *gadget = &ci->gadget;

	seq_printf(s, "speed             = %d\n", gadget->speed);
	seq_printf(s, "max_speed         = %d\n", gadget->max_speed);
	seq_printf(s, "is_otg            = %d\n", gadget->is_otg);
	seq_printf(s, "is_a_peripheral   = %d\n", gadget->is_a_peripheral);
	seq_printf(s, "b_hnp_enable      = %d\n", gadget->b_hnp_enable);
	seq_printf(s, "a_hnp_support     = %d\n", gadget->a_hnp_support);
	seq_printf(s, "a_alt_hnp_support = %d\n", gadget->a_alt_hnp_support);
	seq_printf(s, "name              = %s\n",
		   (gadget->name ? gadget->name : ""));

	if (!ci->driver)
		return 0;

	seq_printf(s, "gadget function   = %s\n",
		       (ci->driver->function ? ci->driver->function : ""));
	seq_printf(s, "gadget max speed  = %d\n", ci->driver->max_speed);

	return 0;
}

static int ci_device_open(struct inode *inode, struct file *file)
{
	return single_open(file, ci_device_show, inode->i_private);
}

static const struct file_operations ci_device_fops = {
	.open		= ci_device_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

/**
 * ci_port_test_show: reads port test mode
 */
static int ci_port_test_show(struct seq_file *s, void *data)
{
	struct ci_hdrc *ci = s->private;
	unsigned long flags;
	unsigned mode;

	spin_lock_irqsave(&ci->lock, flags);
	mode = hw_port_test_get(ci);
	spin_unlock_irqrestore(&ci->lock, flags);

	seq_printf(s, "mode = %u\n", mode);

	return 0;
}

/**
 * ci_port_test_write: writes port test mode
 */
static ssize_t ci_port_test_write(struct file *file, const char __user *ubuf,
				  size_t count, loff_t *ppos)
{
	struct seq_file *s = file->private_data;
	struct ci_hdrc *ci = s->private;
	unsigned long flags;
	unsigned mode;
	char buf[32];
	int ret;

	if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
		return -EFAULT;

	if (sscanf(buf, "%u", &mode) != 1)
		return -EINVAL;

	spin_lock_irqsave(&ci->lock, flags);
	ret = hw_port_test_set(ci, mode);
	spin_unlock_irqrestore(&ci->lock, flags);

	return ret ? ret : count;
}

static int ci_port_test_open(struct inode *inode, struct file *file)
{
	return single_open(file, ci_port_test_show, inode->i_private);
}

static const struct file_operations ci_port_test_fops = {
	.open		= ci_port_test_open,
	.write		= ci_port_test_write,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

/**
 * ci_qheads_show: DMA contents of all queue heads
 */
static int ci_qheads_show(struct seq_file *s, void *data)
{
	struct ci_hdrc *ci = s->private;
	unsigned long flags;
	unsigned i, j;

	if (ci->role != CI_ROLE_GADGET) {
		seq_printf(s, "not in gadget mode\n");
		return 0;
	}

	spin_lock_irqsave(&ci->lock, flags);
	for (i = 0; i < ci->hw_ep_max/2; i++) {
		struct ci_hw_ep *hweprx = &ci->ci_hw_ep[i];
		struct ci_hw_ep *hweptx =
			&ci->ci_hw_ep[i + ci->hw_ep_max/2];
		seq_printf(s, "EP=%02i: RX=%08X TX=%08X\n",
			   i, (u32)hweprx->qh.dma, (u32)hweptx->qh.dma);
		for (j = 0; j < (sizeof(struct ci_hw_qh)/sizeof(u32)); j++)
			seq_printf(s, " %04X:    %08X    %08X\n", j,
				   *((u32 *)hweprx->qh.ptr + j),
				   *((u32 *)hweptx->qh.ptr + j));
	}
	spin_unlock_irqrestore(&ci->lock, flags);

	return 0;
}

static int ci_qheads_open(struct inode *inode, struct file *file)
{
	return single_open(file, ci_qheads_show, inode->i_private);
}

static const struct file_operations ci_qheads_fops = {
	.open		= ci_qheads_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

/**
 * ci_requests_show: DMA contents of all requests currently queued (all endpts)
 */
static int ci_requests_show(struct seq_file *s, void *data)
{
	struct ci_hdrc *ci = s->private;
	unsigned long flags;
	struct list_head   *ptr = NULL;
	struct ci_hw_req *req = NULL;
	struct td_node *node, *tmpnode;
	unsigned i, j, qsize = sizeof(struct ci_hw_td)/sizeof(u32);

	if (ci->role != CI_ROLE_GADGET) {
		seq_printf(s, "not in gadget mode\n");
		return 0;
	}

	spin_lock_irqsave(&ci->lock, flags);
	for (i = 0; i < ci->hw_ep_max; i++)
		list_for_each(ptr, &ci->ci_hw_ep[i].qh.queue) {
			req = list_entry(ptr, struct ci_hw_req, queue);

			list_for_each_entry_safe(node, tmpnode, &req->tds, td) {
				seq_printf(s, "EP=%02i: TD=%08X %s\n",
					   i % (ci->hw_ep_max / 2),
					   (u32)node->dma,
					   ((i < ci->hw_ep_max/2) ?
					   "RX" : "TX"));

				for (j = 0; j < qsize; j++)
					seq_printf(s, " %04X:    %08X\n", j,
						   *((u32 *)node->ptr + j));
			}
		}
	spin_unlock_irqrestore(&ci->lock, flags);

	return 0;
}

static int ci_requests_open(struct inode *inode, struct file *file)
{
	return single_open(file, ci_requests_show, inode->i_private);
}

static const struct file_operations ci_requests_fops = {
	.open		= ci_requests_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

static int ci_otg_show(struct seq_file *s, void *unused)
{
	struct ci_hdrc *ci = s->private;
	struct otg_fsm *fsm;

	if (!ci || !ci_otg_is_fsm_mode(ci))
		return 0;

	fsm = &ci->fsm;

	/* ------ State ----- */
	seq_printf(s, "OTG state: %s\n\n",
			usb_otg_state_string(ci->otg.state));

	/* ------ State Machine Variables ----- */
	seq_printf(s, "a_bus_drop: %d\n", fsm->a_bus_drop);

	seq_printf(s, "a_bus_req: %d\n", fsm->a_bus_req);

	seq_printf(s, "a_srp_det: %d\n", fsm->a_srp_det);

	seq_printf(s, "a_vbus_vld: %d\n", fsm->a_vbus_vld);

	seq_printf(s, "b_conn: %d\n", fsm->b_conn);

	seq_printf(s, "adp_change: %d\n", fsm->adp_change);

	seq_printf(s, "power_up: %d\n", fsm->power_up);

	seq_printf(s, "a_bus_resume: %d\n", fsm->a_bus_resume);

	seq_printf(s, "a_bus_suspend: %d\n", fsm->a_bus_suspend);

	seq_printf(s, "a_conn: %d\n", fsm->a_conn);

	seq_printf(s, "b_bus_req: %d\n", fsm->b_bus_req);

	seq_printf(s, "b_bus_suspend: %d\n", fsm->b_bus_suspend);

	seq_printf(s, "b_se0_srp: %d\n", fsm->b_se0_srp);

	seq_printf(s, "b_ssend_srp: %d\n", fsm->b_ssend_srp);

	seq_printf(s, "b_sess_vld: %d\n", fsm->b_sess_vld);

	seq_printf(s, "b_srp_done: %d\n", fsm->b_srp_done);

	seq_printf(s, "drv_vbus: %d\n", fsm->drv_vbus);

	seq_printf(s, "loc_conn: %d\n", fsm->loc_conn);

	seq_printf(s, "loc_sof: %d\n", fsm->loc_sof);

	seq_printf(s, "adp_prb: %d\n", fsm->adp_prb);

	seq_printf(s, "id: %d\n", fsm->id);

	seq_printf(s, "protocol: %d\n", fsm->protocol);

	return 0;
}

static int ci_otg_open(struct inode *inode, struct file *file)
{
	return single_open(file, ci_otg_show, inode->i_private);
}

static const struct file_operations ci_otg_fops = {
	.open			= ci_otg_open,
	.read			= seq_read,
	.llseek			= seq_lseek,
	.release		= single_release,
};

static int ci_role_show(struct seq_file *s, void *data)
{
	struct ci_hdrc *ci = s->private;

	seq_printf(s, "%s\n", ci_role(ci)->name);

	return 0;
}

static ssize_t ci_role_write(struct file *file, const char __user *ubuf,
			     size_t count, loff_t *ppos)
{
	struct seq_file *s = file->private_data;
	struct ci_hdrc *ci = s->private;
	enum ci_role role;
	char buf[8];
	int ret;

	if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
		return -EFAULT;

	for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++)
		if (ci->roles[role] &&
		    !strncmp(buf, ci->roles[role]->name,
			     strlen(ci->roles[role]->name)))
			break;

	if (role == CI_ROLE_END || role == ci->role)
		return -EINVAL;

	ci_role_stop(ci);
	ret = ci_role_start(ci, role);

	return ret ? ret : count;
}

static int ci_role_open(struct inode *inode, struct file *file)
{
	return single_open(file, ci_role_show, inode->i_private);
}

static const struct file_operations ci_role_fops = {
	.open		= ci_role_open,
	.write		= ci_role_write,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

static int ci_registers_show(struct seq_file *s, void *unused)
{
	struct ci_hdrc *ci = s->private;
	u32 tmp_reg;

	if (!ci || ci->in_lpm)
		return -EPERM;

	/* ------ Registers ----- */
	tmp_reg = hw_read_intr_enable(ci);
	seq_printf(s, "USBINTR reg: %08x\n", tmp_reg);

	tmp_reg = hw_read_intr_status(ci);
	seq_printf(s, "USBSTS reg: %08x\n", tmp_reg);

	tmp_reg = hw_read(ci, OP_USBMODE, ~0);
	seq_printf(s, "USBMODE reg: %08x\n", tmp_reg);

	tmp_reg = hw_read(ci, OP_USBCMD, ~0);
	seq_printf(s, "USBCMD reg: %08x\n", tmp_reg);

	tmp_reg = hw_read(ci, OP_PORTSC, ~0);
	seq_printf(s, "PORTSC reg: %08x\n", tmp_reg);

	if (ci->is_otg) {
		tmp_reg = hw_read_otgsc(ci, ~0);
		seq_printf(s, "OTGSC reg: %08x\n", tmp_reg);
	}

	return 0;
}

static int ci_registers_open(struct inode *inode, struct file *file)
{
	return single_open(file, ci_registers_show, inode->i_private);
}

static const struct file_operations ci_registers_fops = {
	.open			= ci_registers_open,
	.read			= seq_read,
	.llseek			= seq_lseek,
	.release		= single_release,
};

/**
 * dbg_create_files: initializes the attribute interface
 * @ci: device
 *
 * This function returns an error code
 */
int dbg_create_files(struct ci_hdrc *ci)
{
	struct dentry *dent;

	ci->debugfs = debugfs_create_dir(dev_name(ci->dev), NULL);
	if (!ci->debugfs)
		return -ENOMEM;

	dent = debugfs_create_file("device", S_IRUGO, ci->debugfs, ci,
				   &ci_device_fops);
	if (!dent)
		goto err;

	dent = debugfs_create_file("port_test", S_IRUGO | S_IWUSR, ci->debugfs,
				   ci, &ci_port_test_fops);
	if (!dent)
		goto err;

	dent = debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci,
				   &ci_qheads_fops);
	if (!dent)
		goto err;

	dent = debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci,
				   &ci_requests_fops);
	if (!dent)
		goto err;

	if (ci_otg_is_fsm_mode(ci)) {
		dent = debugfs_create_file("otg", S_IRUGO, ci->debugfs, ci,
					&ci_otg_fops);
		if (!dent)
			goto err;
	}

	dent = debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci,
				   &ci_role_fops);
	if (!dent)
		goto err;

	dent = debugfs_create_file("registers", S_IRUGO, ci->debugfs, ci,
				&ci_registers_fops);

	if (dent)
		return 0;
err:
	debugfs_remove_recursive(ci->debugfs);
	return -ENOMEM;
}

/**
 * dbg_remove_files: destroys the attribute interface
 * @ci: device
 */
void dbg_remove_files(struct ci_hdrc *ci)
{
	debugfs_remove_recursive(ci->debugfs);
}