aboutsummaryrefslogtreecommitdiff
path: root/drivers/usb/mtu3/mtu3_debugfs.c
blob: c96e5dab0a480fea8a8fb8e6ad17c69e50b71a6d (plain)
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
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
// SPDX-License-Identifier: GPL-2.0
/*
 * mtu3_debugfs.c - debugfs interface
 *
 * Copyright (C) 2019 MediaTek Inc.
 *
 * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
 */

#include <linux/uaccess.h>

#include "mtu3.h"
#include "mtu3_dr.h"
#include "mtu3_debug.h"

#define dump_register(nm)		\
{					\
	.name = __stringify(nm),	\
	.offset = U3D_ ##nm,		\
}

#define dump_prb_reg(nm, os)	\
{				\
	.name = nm,		\
	.offset = os,		\
}

static const struct debugfs_reg32 mtu3_ippc_regs[] = {
	dump_register(SSUSB_IP_PW_CTRL0),
	dump_register(SSUSB_IP_PW_CTRL1),
	dump_register(SSUSB_IP_PW_CTRL2),
	dump_register(SSUSB_IP_PW_CTRL3),
	dump_register(SSUSB_OTG_STS),
	dump_register(SSUSB_IP_XHCI_CAP),
	dump_register(SSUSB_IP_DEV_CAP),
	dump_register(SSUSB_U3_CTRL_0P),
	dump_register(SSUSB_U2_CTRL_0P),
	dump_register(SSUSB_HW_ID),
	dump_register(SSUSB_HW_SUB_ID),
	dump_register(SSUSB_IP_SPARE0),
};

static const struct debugfs_reg32 mtu3_dev_regs[] = {
	dump_register(LV1ISR),
	dump_register(LV1IER),
	dump_register(EPISR),
	dump_register(EPIER),
	dump_register(EP0CSR),
	dump_register(RXCOUNT0),
	dump_register(QISAR0),
	dump_register(QIER0),
	dump_register(QISAR1),
	dump_register(QIER1),
	dump_register(CAP_EPNTXFFSZ),
	dump_register(CAP_EPNRXFFSZ),
	dump_register(CAP_EPINFO),
	dump_register(MISC_CTRL),
};

static const struct debugfs_reg32 mtu3_csr_regs[] = {
	dump_register(DEVICE_CONF),
	dump_register(DEV_LINK_INTR_ENABLE),
	dump_register(DEV_LINK_INTR),
	dump_register(LTSSM_CTRL),
	dump_register(USB3_CONFIG),
	dump_register(LINK_STATE_MACHINE),
	dump_register(LTSSM_INTR_ENABLE),
	dump_register(LTSSM_INTR),
	dump_register(U3U2_SWITCH_CTRL),
	dump_register(POWER_MANAGEMENT),
	dump_register(DEVICE_CONTROL),
	dump_register(COMMON_USB_INTR_ENABLE),
	dump_register(COMMON_USB_INTR),
	dump_register(USB20_MISC_CONTROL),
	dump_register(USB20_OPSTATE),
};

static int mtu3_link_state_show(struct seq_file *sf, void *unused)
{
	struct mtu3 *mtu = sf->private;
	void __iomem *mbase = mtu->mac_base;

	seq_printf(sf, "opstate: %#x, ltssm: %#x\n",
		   mtu3_readl(mbase, U3D_USB20_OPSTATE),
		   LTSSM_STATE(mtu3_readl(mbase, U3D_LINK_STATE_MACHINE)));

	return 0;
}

static int mtu3_ep_used_show(struct seq_file *sf, void *unused)
{
	struct mtu3 *mtu = sf->private;
	struct mtu3_ep *mep;
	unsigned long flags;
	int used = 0;
	int i;

	spin_lock_irqsave(&mtu->lock, flags);

	for (i = 0; i < mtu->num_eps; i++) {
		mep = mtu->in_eps + i;
		if (mep->flags & MTU3_EP_ENABLED) {
			seq_printf(sf, "%s - type: %d\n", mep->name, mep->type);
			used++;
		}

		mep = mtu->out_eps + i;
		if (mep->flags & MTU3_EP_ENABLED) {
			seq_printf(sf, "%s - type: %d\n", mep->name, mep->type);
			used++;
		}
	}
	seq_printf(sf, "total used: %d eps\n", used);

	spin_unlock_irqrestore(&mtu->lock, flags);

	return 0;
}

DEFINE_SHOW_ATTRIBUTE(mtu3_link_state);
DEFINE_SHOW_ATTRIBUTE(mtu3_ep_used);

static void mtu3_debugfs_regset(struct mtu3 *mtu, void __iomem *base,
				const struct debugfs_reg32 *regs, size_t nregs,
				const char *name, struct dentry *parent)
{
	struct debugfs_regset32 *regset;
	struct mtu3_regset *mregs;

	mregs = devm_kzalloc(mtu->dev, sizeof(*regset), GFP_KERNEL);
	if (!mregs)
		return;

	sprintf(mregs->name, "%s", name);
	regset = &mregs->regset;
	regset->regs = regs;
	regset->nregs = nregs;
	regset->base = base;

	debugfs_create_regset32(mregs->name, 0444, parent, regset);
}

static void mtu3_debugfs_ep_regset(struct mtu3 *mtu, struct mtu3_ep *mep,
				   struct dentry *parent)
{
	struct debugfs_reg32 *regs;
	int epnum = mep->epnum;
	int in = mep->is_in;

	regs = devm_kcalloc(mtu->dev, 7, sizeof(*regs), GFP_KERNEL);
	if (!regs)
		return;

	regs[0].name = in ? "TCR0" : "RCR0";
	regs[0].offset = in ? MU3D_EP_TXCR0(epnum) : MU3D_EP_RXCR0(epnum);
	regs[1].name = in ? "TCR1" : "RCR1";
	regs[1].offset = in ? MU3D_EP_TXCR1(epnum) : MU3D_EP_RXCR1(epnum);
	regs[2].name = in ? "TCR2" : "RCR2";
	regs[2].offset = in ? MU3D_EP_TXCR2(epnum) : MU3D_EP_RXCR2(epnum);
	regs[3].name = in ? "TQHIAR" : "RQHIAR";
	regs[3].offset = in ? USB_QMU_TQHIAR(epnum) : USB_QMU_RQHIAR(epnum);
	regs[4].name = in ? "TQCSR" : "RQCSR";
	regs[4].offset = in ? USB_QMU_TQCSR(epnum) : USB_QMU_RQCSR(epnum);
	regs[5].name = in ? "TQSAR" : "RQSAR";
	regs[5].offset = in ? USB_QMU_TQSAR(epnum) : USB_QMU_RQSAR(epnum);
	regs[6].name = in ? "TQCPR" : "RQCPR";
	regs[6].offset = in ? USB_QMU_TQCPR(epnum) : USB_QMU_RQCPR(epnum);

	mtu3_debugfs_regset(mtu, mtu->mac_base, regs, 7, "ep-regs", parent);
}

static int mtu3_ep_info_show(struct seq_file *sf, void *unused)
{
	struct mtu3_ep *mep = sf->private;
	struct mtu3 *mtu = mep->mtu;
	unsigned long flags;

	spin_lock_irqsave(&mtu->lock, flags);
	seq_printf(sf, "ep - type:%d, maxp:%d, slot:%d, flags:%x\n",
		   mep->type, mep->maxp, mep->slot, mep->flags);
	spin_unlock_irqrestore(&mtu->lock, flags);

	return 0;
}

static int mtu3_fifo_show(struct seq_file *sf, void *unused)
{
	struct mtu3_ep *mep = sf->private;
	struct mtu3 *mtu = mep->mtu;
	unsigned long flags;

	spin_lock_irqsave(&mtu->lock, flags);
	seq_printf(sf, "fifo - seg_size:%d, addr:%d, size:%d\n",
		   mep->fifo_seg_size, mep->fifo_addr, mep->fifo_size);
	spin_unlock_irqrestore(&mtu->lock, flags);

	return 0;
}

static int mtu3_qmu_ring_show(struct seq_file *sf, void *unused)
{
	struct mtu3_ep *mep = sf->private;
	struct mtu3 *mtu = mep->mtu;
	struct mtu3_gpd_ring *ring;
	unsigned long flags;

	ring = &mep->gpd_ring;
	spin_lock_irqsave(&mtu->lock, flags);
	seq_printf(sf,
		   "qmu-ring - dma:%pad, start:%p, end:%p, enq:%p, dep:%p\n",
		   &ring->dma, ring->start, ring->end,
		   ring->enqueue, ring->dequeue);
	spin_unlock_irqrestore(&mtu->lock, flags);

	return 0;
}

static int mtu3_qmu_gpd_show(struct seq_file *sf, void *unused)
{
	struct mtu3_ep *mep = sf->private;
	struct mtu3 *mtu = mep->mtu;
	struct mtu3_gpd_ring *ring;
	struct qmu_gpd *gpd;
	dma_addr_t dma;
	unsigned long flags;
	int i;

	spin_lock_irqsave(&mtu->lock, flags);
	ring = &mep->gpd_ring;
	gpd = ring->start;
	if (!gpd || !(mep->flags & MTU3_EP_ENABLED)) {
		seq_puts(sf, "empty!\n");
		goto out;
	}

	for (i = 0; i < MAX_GPD_NUM; i++, gpd++) {
		dma = ring->dma + i * sizeof(*gpd);
		seq_printf(sf, "gpd.%03d -> %pad, %p: %08x %08x %08x %08x\n",
			   i, &dma, gpd, gpd->dw0_info, gpd->next_gpd,
			   gpd->buffer, gpd->dw3_info);
	}

out:
	spin_unlock_irqrestore(&mtu->lock, flags);

	return 0;
}

static const struct mtu3_file_map mtu3_ep_files[] = {
	{"ep-info", mtu3_ep_info_show, },
	{"fifo", mtu3_fifo_show, },
	{"qmu-ring", mtu3_qmu_ring_show, },
	{"qmu-gpd", mtu3_qmu_gpd_show, },
};

static int mtu3_ep_open(struct inode *inode, struct file *file)
{
	const char *file_name = file_dentry(file)->d_iname;
	const struct mtu3_file_map *f_map;
	int i;

	for (i = 0; i < ARRAY_SIZE(mtu3_ep_files); i++) {
		f_map = &mtu3_ep_files[i];

		if (strcmp(f_map->name, file_name) == 0)
			break;
	}

	return single_open(file, f_map->show, inode->i_private);
}

static const struct file_operations mtu3_ep_fops = {
	.open = mtu3_ep_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static struct debugfs_reg32 mtu3_prb_regs[] = {
	dump_prb_reg("enable", U3D_SSUSB_PRB_CTRL0),
	dump_prb_reg("byte-sell", U3D_SSUSB_PRB_CTRL1),
	dump_prb_reg("byte-selh", U3D_SSUSB_PRB_CTRL2),
	dump_prb_reg("module-sel", U3D_SSUSB_PRB_CTRL3),
	dump_prb_reg("sw-out", U3D_SSUSB_PRB_CTRL4),
	dump_prb_reg("data", U3D_SSUSB_PRB_CTRL5),
};

static int mtu3_probe_show(struct seq_file *sf, void *unused)
{
	const char *file_name = file_dentry(sf->file)->d_iname;
	struct mtu3 *mtu = sf->private;
	const struct debugfs_reg32 *regs;
	int i;

	for (i = 0; i < ARRAY_SIZE(mtu3_prb_regs); i++) {
		regs = &mtu3_prb_regs[i];

		if (strcmp(regs->name, file_name) == 0)
			break;
	}

	seq_printf(sf, "0x%04x - 0x%08x\n", (u32)regs->offset,
		   mtu3_readl(mtu->ippc_base, (u32)regs->offset));

	return 0;
}

static int mtu3_probe_open(struct inode *inode, struct file *file)
{
	return single_open(file, mtu3_probe_show, inode->i_private);
}

static ssize_t mtu3_probe_write(struct file *file, const char __user *ubuf,
				size_t count, loff_t *ppos)
{
	const char *file_name = file_dentry(file)->d_iname;
	struct seq_file *sf = file->private_data;
	struct mtu3 *mtu = sf->private;
	const struct debugfs_reg32 *regs;
	char buf[32];
	u32 val;
	int i;

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

	if (kstrtou32(buf, 0, &val))
		return -EINVAL;

	for (i = 0; i < ARRAY_SIZE(mtu3_prb_regs); i++) {
		regs = &mtu3_prb_regs[i];

		if (strcmp(regs->name, file_name) == 0)
			break;
	}
	mtu3_writel(mtu->ippc_base, (u32)regs->offset, val);

	return count;
}

static const struct file_operations mtu3_probe_fops = {
	.open = mtu3_probe_open,
	.write = mtu3_probe_write,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static void mtu3_debugfs_create_prb_files(struct mtu3 *mtu)
{
	struct ssusb_mtk *ssusb = mtu->ssusb;
	struct debugfs_reg32 *regs;
	struct dentry *dir_prb;
	int i;

	dir_prb = debugfs_create_dir("probe", ssusb->dbgfs_root);

	for (i = 0; i < ARRAY_SIZE(mtu3_prb_regs); i++) {
		regs = &mtu3_prb_regs[i];
		debugfs_create_file(regs->name, 0644, dir_prb,
				    mtu, &mtu3_probe_fops);
	}

	mtu3_debugfs_regset(mtu, mtu->ippc_base, mtu3_prb_regs,
			    ARRAY_SIZE(mtu3_prb_regs), "regs", dir_prb);
}

static void mtu3_debugfs_create_ep_dir(struct mtu3_ep *mep,
				       struct dentry *parent)
{
	const struct mtu3_file_map *files;
	struct dentry *dir_ep;
	int i;

	dir_ep = debugfs_create_dir(mep->name, parent);
	mtu3_debugfs_ep_regset(mep->mtu, mep, dir_ep);

	for (i = 0; i < ARRAY_SIZE(mtu3_ep_files); i++) {
		files = &mtu3_ep_files[i];

		debugfs_create_file(files->name, 0444, dir_ep,
				    mep, &mtu3_ep_fops);
	}
}

static void mtu3_debugfs_create_ep_dirs(struct mtu3 *mtu)
{
	struct ssusb_mtk *ssusb = mtu->ssusb;
	struct dentry *dir_eps;
	int i;

	dir_eps = debugfs_create_dir("eps", ssusb->dbgfs_root);

	for (i = 1; i < mtu->num_eps; i++) {
		mtu3_debugfs_create_ep_dir(mtu->in_eps + i, dir_eps);
		mtu3_debugfs_create_ep_dir(mtu->out_eps + i, dir_eps);
	}
}

void ssusb_dev_debugfs_init(struct ssusb_mtk *ssusb)
{
	struct mtu3 *mtu = ssusb->u3d;
	struct dentry *dir_regs;

	dir_regs = debugfs_create_dir("regs", ssusb->dbgfs_root);

	mtu3_debugfs_regset(mtu, mtu->ippc_base,
			    mtu3_ippc_regs, ARRAY_SIZE(mtu3_ippc_regs),
			    "reg-ippc", dir_regs);

	mtu3_debugfs_regset(mtu, mtu->mac_base,
			    mtu3_dev_regs, ARRAY_SIZE(mtu3_dev_regs),
			    "reg-dev", dir_regs);

	mtu3_debugfs_regset(mtu, mtu->mac_base,
			    mtu3_csr_regs, ARRAY_SIZE(mtu3_csr_regs),
			    "reg-csr", dir_regs);

	mtu3_debugfs_create_ep_dirs(mtu);

	mtu3_debugfs_create_prb_files(mtu);

	debugfs_create_file("link-state", 0444, ssusb->dbgfs_root,
			    mtu, &mtu3_link_state_fops);
	debugfs_create_file("ep-used", 0444, ssusb->dbgfs_root,
			    mtu, &mtu3_ep_used_fops);
}

static int ssusb_mode_show(struct seq_file *sf, void *unused)
{
	struct ssusb_mtk *ssusb = sf->private;

	seq_printf(sf, "current mode: %s(%s drd)\n(echo device/host)\n",
		   ssusb->is_host ? "host" : "device",
		   ssusb->otg_switch.manual_drd_enabled ? "manual" : "auto");

	return 0;
}

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

static ssize_t ssusb_mode_write(struct file *file, const char __user *ubuf,
				size_t count, loff_t *ppos)
{
	struct seq_file *sf = file->private_data;
	struct ssusb_mtk *ssusb = sf->private;
	char buf[16];

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

	if (!strncmp(buf, "host", 4) && !ssusb->is_host) {
		ssusb_mode_switch(ssusb, 1);
	} else if (!strncmp(buf, "device", 6) && ssusb->is_host) {
		ssusb_mode_switch(ssusb, 0);
	} else {
		dev_err(ssusb->dev, "wrong or duplicated setting\n");
		return -EINVAL;
	}

	return count;
}

static const struct file_operations ssusb_mode_fops = {
	.open = ssusb_mode_open,
	.write = ssusb_mode_write,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static int ssusb_vbus_show(struct seq_file *sf, void *unused)
{
	struct ssusb_mtk *ssusb = sf->private;
	struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;

	seq_printf(sf, "vbus state: %s\n(echo on/off)\n",
		   regulator_is_enabled(otg_sx->vbus) ? "on" : "off");

	return 0;
}

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

static ssize_t ssusb_vbus_write(struct file *file, const char __user *ubuf,
				size_t count, loff_t *ppos)
{
	struct seq_file *sf = file->private_data;
	struct ssusb_mtk *ssusb = sf->private;
	struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
	char buf[16];
	bool enable;

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

	if (kstrtobool(buf, &enable)) {
		dev_err(ssusb->dev, "wrong setting\n");
		return -EINVAL;
	}

	ssusb_set_vbus(otg_sx, enable);

	return count;
}

static const struct file_operations ssusb_vbus_fops = {
	.open = ssusb_vbus_open,
	.write = ssusb_vbus_write,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

void ssusb_dr_debugfs_init(struct ssusb_mtk *ssusb)
{
	struct dentry *root = ssusb->dbgfs_root;

	debugfs_create_file("mode", 0644, root, ssusb, &ssusb_mode_fops);
	debugfs_create_file("vbus", 0644, root, ssusb, &ssusb_vbus_fops);
}

void ssusb_debugfs_create_root(struct ssusb_mtk *ssusb)
{
	ssusb->dbgfs_root =
		debugfs_create_dir(dev_name(ssusb->dev), usb_debug_root);
}

void ssusb_debugfs_remove_root(struct ssusb_mtk *ssusb)
{
	debugfs_remove_recursive(ssusb->dbgfs_root);
	ssusb->dbgfs_root = NULL;
}