1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * mtu3_debugfs.c - debugfs interface
4 *
5 * Copyright (C) 2019 MediaTek Inc.
6 *
7 * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
8 */
9
10 #include <linux/uaccess.h>
11
12 #include "mtu3.h"
13 #include "mtu3_dr.h"
14 #include "mtu3_debug.h"
15
16 #define dump_register(nm) \
17 { \
18 .name = __stringify(nm), \
19 .offset = U3D_ ##nm, \
20 }
21
22 #define dump_prb_reg(nm, os) \
23 { \
24 .name = nm, \
25 .offset = os, \
26 }
27
28 static const struct debugfs_reg32 mtu3_ippc_regs[] = {
29 dump_register(SSUSB_IP_PW_CTRL0),
30 dump_register(SSUSB_IP_PW_CTRL1),
31 dump_register(SSUSB_IP_PW_CTRL2),
32 dump_register(SSUSB_IP_PW_CTRL3),
33 dump_register(SSUSB_IP_PW_STS1),
34 dump_register(SSUSB_OTG_STS),
35 dump_register(SSUSB_IP_XHCI_CAP),
36 dump_register(SSUSB_IP_DEV_CAP),
37 dump_register(SSUSB_U3_CTRL_0P),
38 dump_register(SSUSB_U2_CTRL_0P),
39 dump_register(SSUSB_HW_ID),
40 dump_register(SSUSB_HW_SUB_ID),
41 dump_register(SSUSB_IP_SPARE0),
42 };
43
44 static const struct debugfs_reg32 mtu3_dev_regs[] = {
45 dump_register(LV1ISR),
46 dump_register(LV1IER),
47 dump_register(EPISR),
48 dump_register(EPIER),
49 dump_register(EP0CSR),
50 dump_register(RXCOUNT0),
51 dump_register(QISAR0),
52 dump_register(QIER0),
53 dump_register(QISAR1),
54 dump_register(QIER1),
55 dump_register(CAP_EPNTXFFSZ),
56 dump_register(CAP_EPNRXFFSZ),
57 dump_register(CAP_EPINFO),
58 dump_register(MISC_CTRL),
59 };
60
61 static const struct debugfs_reg32 mtu3_csr_regs[] = {
62 dump_register(DEVICE_CONF),
63 dump_register(DEV_LINK_INTR_ENABLE),
64 dump_register(DEV_LINK_INTR),
65 dump_register(LTSSM_CTRL),
66 dump_register(USB3_CONFIG),
67 dump_register(LINK_STATE_MACHINE),
68 dump_register(LTSSM_INTR_ENABLE),
69 dump_register(LTSSM_INTR),
70 dump_register(U3U2_SWITCH_CTRL),
71 dump_register(POWER_MANAGEMENT),
72 dump_register(DEVICE_CONTROL),
73 dump_register(COMMON_USB_INTR_ENABLE),
74 dump_register(COMMON_USB_INTR),
75 dump_register(USB20_MISC_CONTROL),
76 dump_register(USB20_OPSTATE),
77 };
78
mtu3_link_state_show(struct seq_file * sf,void * unused)79 static int mtu3_link_state_show(struct seq_file *sf, void *unused)
80 {
81 struct mtu3 *mtu = sf->private;
82 void __iomem *mbase = mtu->mac_base;
83
84 seq_printf(sf, "opstate: %#x, ltssm: %#x\n",
85 mtu3_readl(mbase, U3D_USB20_OPSTATE),
86 LTSSM_STATE(mtu3_readl(mbase, U3D_LINK_STATE_MACHINE)));
87
88 return 0;
89 }
90
mtu3_ep_used_show(struct seq_file * sf,void * unused)91 static int mtu3_ep_used_show(struct seq_file *sf, void *unused)
92 {
93 struct mtu3 *mtu = sf->private;
94 struct mtu3_ep *mep;
95 unsigned long flags;
96 int used = 0;
97 int i;
98
99 spin_lock_irqsave(&mtu->lock, flags);
100
101 for (i = 0; i < mtu->num_eps; i++) {
102 mep = mtu->in_eps + i;
103 if (mep->flags & MTU3_EP_ENABLED) {
104 seq_printf(sf, "%s - type: %s\n", mep->name, usb_ep_type_string(mep->type));
105 used++;
106 }
107
108 mep = mtu->out_eps + i;
109 if (mep->flags & MTU3_EP_ENABLED) {
110 seq_printf(sf, "%s - type: %s\n", mep->name, usb_ep_type_string(mep->type));
111 used++;
112 }
113 }
114 seq_printf(sf, "total used: %d eps\n", used);
115
116 spin_unlock_irqrestore(&mtu->lock, flags);
117
118 return 0;
119 }
120
121 DEFINE_SHOW_ATTRIBUTE(mtu3_link_state);
122 DEFINE_SHOW_ATTRIBUTE(mtu3_ep_used);
123
mtu3_debugfs_regset(struct mtu3 * mtu,void __iomem * base,const struct debugfs_reg32 * regs,size_t nregs,const char * name,struct dentry * parent)124 static void mtu3_debugfs_regset(struct mtu3 *mtu, void __iomem *base,
125 const struct debugfs_reg32 *regs, size_t nregs,
126 const char *name, struct dentry *parent)
127 {
128 struct debugfs_regset32 *regset;
129 struct mtu3_regset *mregs;
130
131 mregs = devm_kzalloc(mtu->dev, sizeof(*mregs), GFP_KERNEL);
132 if (!mregs)
133 return;
134
135 sprintf(mregs->name, "%s", name);
136 regset = &mregs->regset;
137 regset->regs = regs;
138 regset->nregs = nregs;
139 regset->base = base;
140
141 debugfs_create_regset32(mregs->name, 0444, parent, regset);
142 }
143
mtu3_debugfs_ep_regset(struct mtu3 * mtu,struct mtu3_ep * mep,struct dentry * parent)144 static void mtu3_debugfs_ep_regset(struct mtu3 *mtu, struct mtu3_ep *mep,
145 struct dentry *parent)
146 {
147 struct debugfs_reg32 *regs;
148 int epnum = mep->epnum;
149 int in = mep->is_in;
150
151 regs = devm_kcalloc(mtu->dev, 7, sizeof(*regs), GFP_KERNEL);
152 if (!regs)
153 return;
154
155 regs[0].name = in ? "TCR0" : "RCR0";
156 regs[0].offset = in ? MU3D_EP_TXCR0(epnum) : MU3D_EP_RXCR0(epnum);
157 regs[1].name = in ? "TCR1" : "RCR1";
158 regs[1].offset = in ? MU3D_EP_TXCR1(epnum) : MU3D_EP_RXCR1(epnum);
159 regs[2].name = in ? "TCR2" : "RCR2";
160 regs[2].offset = in ? MU3D_EP_TXCR2(epnum) : MU3D_EP_RXCR2(epnum);
161 regs[3].name = in ? "TQHIAR" : "RQHIAR";
162 regs[3].offset = in ? USB_QMU_TQHIAR(epnum) : USB_QMU_RQHIAR(epnum);
163 regs[4].name = in ? "TQCSR" : "RQCSR";
164 regs[4].offset = in ? USB_QMU_TQCSR(epnum) : USB_QMU_RQCSR(epnum);
165 regs[5].name = in ? "TQSAR" : "RQSAR";
166 regs[5].offset = in ? USB_QMU_TQSAR(epnum) : USB_QMU_RQSAR(epnum);
167 regs[6].name = in ? "TQCPR" : "RQCPR";
168 regs[6].offset = in ? USB_QMU_TQCPR(epnum) : USB_QMU_RQCPR(epnum);
169
170 mtu3_debugfs_regset(mtu, mtu->mac_base, regs, 7, "ep-regs", parent);
171 }
172
mtu3_ep_info_show(struct seq_file * sf,void * unused)173 static int mtu3_ep_info_show(struct seq_file *sf, void *unused)
174 {
175 struct mtu3_ep *mep = sf->private;
176 struct mtu3 *mtu = mep->mtu;
177 unsigned long flags;
178
179 spin_lock_irqsave(&mtu->lock, flags);
180 seq_printf(sf, "ep - type:%s, maxp:%d, slot:%d, flags:%x\n",
181 usb_ep_type_string(mep->type), mep->maxp, mep->slot, mep->flags);
182 spin_unlock_irqrestore(&mtu->lock, flags);
183
184 return 0;
185 }
186
mtu3_fifo_show(struct seq_file * sf,void * unused)187 static int mtu3_fifo_show(struct seq_file *sf, void *unused)
188 {
189 struct mtu3_ep *mep = sf->private;
190 struct mtu3 *mtu = mep->mtu;
191 unsigned long flags;
192
193 spin_lock_irqsave(&mtu->lock, flags);
194 seq_printf(sf, "fifo - seg_size:%d, addr:%d, size:%d\n",
195 mep->fifo_seg_size, mep->fifo_addr, mep->fifo_size);
196 spin_unlock_irqrestore(&mtu->lock, flags);
197
198 return 0;
199 }
200
mtu3_qmu_ring_show(struct seq_file * sf,void * unused)201 static int mtu3_qmu_ring_show(struct seq_file *sf, void *unused)
202 {
203 struct mtu3_ep *mep = sf->private;
204 struct mtu3 *mtu = mep->mtu;
205 struct mtu3_gpd_ring *ring;
206 unsigned long flags;
207
208 ring = &mep->gpd_ring;
209 spin_lock_irqsave(&mtu->lock, flags);
210 seq_printf(sf,
211 "qmu-ring - dma:%pad, start:%p, end:%p, enq:%p, dep:%p\n",
212 &ring->dma, ring->start, ring->end,
213 ring->enqueue, ring->dequeue);
214 spin_unlock_irqrestore(&mtu->lock, flags);
215
216 return 0;
217 }
218
mtu3_qmu_gpd_show(struct seq_file * sf,void * unused)219 static int mtu3_qmu_gpd_show(struct seq_file *sf, void *unused)
220 {
221 struct mtu3_ep *mep = sf->private;
222 struct mtu3 *mtu = mep->mtu;
223 struct mtu3_gpd_ring *ring;
224 struct qmu_gpd *gpd;
225 dma_addr_t dma;
226 unsigned long flags;
227 int i;
228
229 spin_lock_irqsave(&mtu->lock, flags);
230 ring = &mep->gpd_ring;
231 gpd = ring->start;
232 if (!gpd || !(mep->flags & MTU3_EP_ENABLED)) {
233 seq_puts(sf, "empty!\n");
234 goto out;
235 }
236
237 for (i = 0; i < MAX_GPD_NUM; i++, gpd++) {
238 dma = ring->dma + i * sizeof(*gpd);
239 seq_printf(sf, "gpd.%03d -> %pad, %p: %08x %08x %08x %08x\n",
240 i, &dma, gpd, gpd->dw0_info, gpd->next_gpd,
241 gpd->buffer, gpd->dw3_info);
242 }
243
244 out:
245 spin_unlock_irqrestore(&mtu->lock, flags);
246
247 return 0;
248 }
249
250 static const struct mtu3_file_map mtu3_ep_files[] = {
251 {"ep-info", mtu3_ep_info_show, },
252 {"fifo", mtu3_fifo_show, },
253 {"qmu-ring", mtu3_qmu_ring_show, },
254 {"qmu-gpd", mtu3_qmu_gpd_show, },
255 };
256
mtu3_ep_open(struct inode * inode,struct file * file)257 static int mtu3_ep_open(struct inode *inode, struct file *file)
258 {
259 const char *file_name = file_dentry(file)->d_iname;
260 const struct mtu3_file_map *f_map;
261 int i;
262
263 for (i = 0; i < ARRAY_SIZE(mtu3_ep_files); i++) {
264 f_map = &mtu3_ep_files[i];
265
266 if (strcmp(f_map->name, file_name) == 0)
267 break;
268 }
269
270 return single_open(file, f_map->show, inode->i_private);
271 }
272
273 static const struct file_operations mtu3_ep_fops = {
274 .open = mtu3_ep_open,
275 .read = seq_read,
276 .llseek = seq_lseek,
277 .release = single_release,
278 };
279
280 static const struct debugfs_reg32 mtu3_prb_regs[] = {
281 dump_prb_reg("enable", U3D_SSUSB_PRB_CTRL0),
282 dump_prb_reg("byte-sell", U3D_SSUSB_PRB_CTRL1),
283 dump_prb_reg("byte-selh", U3D_SSUSB_PRB_CTRL2),
284 dump_prb_reg("module-sel", U3D_SSUSB_PRB_CTRL3),
285 dump_prb_reg("sw-out", U3D_SSUSB_PRB_CTRL4),
286 dump_prb_reg("data", U3D_SSUSB_PRB_CTRL5),
287 };
288
mtu3_probe_show(struct seq_file * sf,void * unused)289 static int mtu3_probe_show(struct seq_file *sf, void *unused)
290 {
291 const char *file_name = file_dentry(sf->file)->d_iname;
292 struct mtu3 *mtu = sf->private;
293 const struct debugfs_reg32 *regs;
294 int i;
295
296 for (i = 0; i < ARRAY_SIZE(mtu3_prb_regs); i++) {
297 regs = &mtu3_prb_regs[i];
298
299 if (strcmp(regs->name, file_name) == 0)
300 break;
301 }
302
303 seq_printf(sf, "0x%04x - 0x%08x\n", (u32)regs->offset,
304 mtu3_readl(mtu->ippc_base, (u32)regs->offset));
305
306 return 0;
307 }
308
mtu3_probe_open(struct inode * inode,struct file * file)309 static int mtu3_probe_open(struct inode *inode, struct file *file)
310 {
311 return single_open(file, mtu3_probe_show, inode->i_private);
312 }
313
mtu3_probe_write(struct file * file,const char __user * ubuf,size_t count,loff_t * ppos)314 static ssize_t mtu3_probe_write(struct file *file, const char __user *ubuf,
315 size_t count, loff_t *ppos)
316 {
317 const char *file_name = file_dentry(file)->d_iname;
318 struct seq_file *sf = file->private_data;
319 struct mtu3 *mtu = sf->private;
320 const struct debugfs_reg32 *regs;
321 char buf[32];
322 u32 val;
323 int i;
324
325 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
326 return -EFAULT;
327
328 if (kstrtou32(buf, 0, &val))
329 return -EINVAL;
330
331 for (i = 0; i < ARRAY_SIZE(mtu3_prb_regs); i++) {
332 regs = &mtu3_prb_regs[i];
333
334 if (strcmp(regs->name, file_name) == 0)
335 break;
336 }
337 mtu3_writel(mtu->ippc_base, (u32)regs->offset, val);
338
339 return count;
340 }
341
342 static const struct file_operations mtu3_probe_fops = {
343 .open = mtu3_probe_open,
344 .write = mtu3_probe_write,
345 .read = seq_read,
346 .llseek = seq_lseek,
347 .release = single_release,
348 };
349
mtu3_debugfs_create_prb_files(struct mtu3 * mtu)350 static void mtu3_debugfs_create_prb_files(struct mtu3 *mtu)
351 {
352 struct ssusb_mtk *ssusb = mtu->ssusb;
353 const struct debugfs_reg32 *regs;
354 struct dentry *dir_prb;
355 int i;
356
357 dir_prb = debugfs_create_dir("probe", ssusb->dbgfs_root);
358
359 for (i = 0; i < ARRAY_SIZE(mtu3_prb_regs); i++) {
360 regs = &mtu3_prb_regs[i];
361 debugfs_create_file(regs->name, 0644, dir_prb,
362 mtu, &mtu3_probe_fops);
363 }
364
365 mtu3_debugfs_regset(mtu, mtu->ippc_base, mtu3_prb_regs,
366 ARRAY_SIZE(mtu3_prb_regs), "regs", dir_prb);
367 }
368
mtu3_debugfs_create_ep_dir(struct mtu3_ep * mep,struct dentry * parent)369 static void mtu3_debugfs_create_ep_dir(struct mtu3_ep *mep,
370 struct dentry *parent)
371 {
372 const struct mtu3_file_map *files;
373 struct dentry *dir_ep;
374 int i;
375
376 dir_ep = debugfs_create_dir(mep->name, parent);
377 mtu3_debugfs_ep_regset(mep->mtu, mep, dir_ep);
378
379 for (i = 0; i < ARRAY_SIZE(mtu3_ep_files); i++) {
380 files = &mtu3_ep_files[i];
381
382 debugfs_create_file(files->name, 0444, dir_ep,
383 mep, &mtu3_ep_fops);
384 }
385 }
386
mtu3_debugfs_create_ep_dirs(struct mtu3 * mtu)387 static void mtu3_debugfs_create_ep_dirs(struct mtu3 *mtu)
388 {
389 struct ssusb_mtk *ssusb = mtu->ssusb;
390 struct dentry *dir_eps;
391 int i;
392
393 dir_eps = debugfs_create_dir("eps", ssusb->dbgfs_root);
394
395 for (i = 1; i < mtu->num_eps; i++) {
396 mtu3_debugfs_create_ep_dir(mtu->in_eps + i, dir_eps);
397 mtu3_debugfs_create_ep_dir(mtu->out_eps + i, dir_eps);
398 }
399 }
400
ssusb_dev_debugfs_init(struct ssusb_mtk * ssusb)401 void ssusb_dev_debugfs_init(struct ssusb_mtk *ssusb)
402 {
403 struct mtu3 *mtu = ssusb->u3d;
404 struct dentry *dir_regs;
405
406 dir_regs = debugfs_create_dir("regs", ssusb->dbgfs_root);
407
408 mtu3_debugfs_regset(mtu, mtu->ippc_base,
409 mtu3_ippc_regs, ARRAY_SIZE(mtu3_ippc_regs),
410 "reg-ippc", dir_regs);
411
412 mtu3_debugfs_regset(mtu, mtu->mac_base,
413 mtu3_dev_regs, ARRAY_SIZE(mtu3_dev_regs),
414 "reg-dev", dir_regs);
415
416 mtu3_debugfs_regset(mtu, mtu->mac_base,
417 mtu3_csr_regs, ARRAY_SIZE(mtu3_csr_regs),
418 "reg-csr", dir_regs);
419
420 mtu3_debugfs_create_ep_dirs(mtu);
421
422 mtu3_debugfs_create_prb_files(mtu);
423
424 debugfs_create_file("link-state", 0444, ssusb->dbgfs_root,
425 mtu, &mtu3_link_state_fops);
426 debugfs_create_file("ep-used", 0444, ssusb->dbgfs_root,
427 mtu, &mtu3_ep_used_fops);
428 }
429
ssusb_mode_show(struct seq_file * sf,void * unused)430 static int ssusb_mode_show(struct seq_file *sf, void *unused)
431 {
432 struct ssusb_mtk *ssusb = sf->private;
433
434 seq_printf(sf, "current mode: %s(%s drd)\n(echo device/host)\n",
435 ssusb->is_host ? "host" : "device",
436 ssusb->otg_switch.manual_drd_enabled ? "manual" : "auto");
437
438 return 0;
439 }
440
ssusb_mode_open(struct inode * inode,struct file * file)441 static int ssusb_mode_open(struct inode *inode, struct file *file)
442 {
443 return single_open(file, ssusb_mode_show, inode->i_private);
444 }
445
ssusb_mode_write(struct file * file,const char __user * ubuf,size_t count,loff_t * ppos)446 static ssize_t ssusb_mode_write(struct file *file, const char __user *ubuf,
447 size_t count, loff_t *ppos)
448 {
449 struct seq_file *sf = file->private_data;
450 struct ssusb_mtk *ssusb = sf->private;
451 char buf[16];
452
453 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
454 return -EFAULT;
455
456 if (!strncmp(buf, "host", 4) && !ssusb->is_host) {
457 ssusb_mode_switch(ssusb, 1);
458 } else if (!strncmp(buf, "device", 6) && ssusb->is_host) {
459 ssusb_mode_switch(ssusb, 0);
460 } else {
461 dev_err(ssusb->dev, "wrong or duplicated setting\n");
462 return -EINVAL;
463 }
464
465 return count;
466 }
467
468 static const struct file_operations ssusb_mode_fops = {
469 .open = ssusb_mode_open,
470 .write = ssusb_mode_write,
471 .read = seq_read,
472 .llseek = seq_lseek,
473 .release = single_release,
474 };
475
ssusb_vbus_show(struct seq_file * sf,void * unused)476 static int ssusb_vbus_show(struct seq_file *sf, void *unused)
477 {
478 struct ssusb_mtk *ssusb = sf->private;
479 struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
480
481 seq_printf(sf, "vbus state: %s\n(echo on/off)\n",
482 regulator_is_enabled(otg_sx->vbus) ? "on" : "off");
483
484 return 0;
485 }
486
ssusb_vbus_open(struct inode * inode,struct file * file)487 static int ssusb_vbus_open(struct inode *inode, struct file *file)
488 {
489 return single_open(file, ssusb_vbus_show, inode->i_private);
490 }
491
ssusb_vbus_write(struct file * file,const char __user * ubuf,size_t count,loff_t * ppos)492 static ssize_t ssusb_vbus_write(struct file *file, const char __user *ubuf,
493 size_t count, loff_t *ppos)
494 {
495 struct seq_file *sf = file->private_data;
496 struct ssusb_mtk *ssusb = sf->private;
497 struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
498 char buf[16];
499 bool enable;
500
501 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
502 return -EFAULT;
503
504 if (kstrtobool(buf, &enable)) {
505 dev_err(ssusb->dev, "wrong setting\n");
506 return -EINVAL;
507 }
508
509 ssusb_set_vbus(otg_sx, enable);
510
511 return count;
512 }
513
514 static const struct file_operations ssusb_vbus_fops = {
515 .open = ssusb_vbus_open,
516 .write = ssusb_vbus_write,
517 .read = seq_read,
518 .llseek = seq_lseek,
519 .release = single_release,
520 };
521
ssusb_dr_debugfs_init(struct ssusb_mtk * ssusb)522 void ssusb_dr_debugfs_init(struct ssusb_mtk *ssusb)
523 {
524 struct dentry *root = ssusb->dbgfs_root;
525
526 debugfs_create_file("mode", 0644, root, ssusb, &ssusb_mode_fops);
527 debugfs_create_file("vbus", 0644, root, ssusb, &ssusb_vbus_fops);
528 }
529
ssusb_debugfs_create_root(struct ssusb_mtk * ssusb)530 void ssusb_debugfs_create_root(struct ssusb_mtk *ssusb)
531 {
532 ssusb->dbgfs_root =
533 debugfs_create_dir(dev_name(ssusb->dev), usb_debug_root);
534 }
535
ssusb_debugfs_remove_root(struct ssusb_mtk * ssusb)536 void ssusb_debugfs_remove_root(struct ssusb_mtk *ssusb)
537 {
538 debugfs_remove_recursive(ssusb->dbgfs_root);
539 ssusb->dbgfs_root = NULL;
540 }
541
