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