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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
e443b333 | 2 | #include <linux/kernel.h> |
3c37bb68 AS |
3 | #include <linux/device.h> |
4 | #include <linux/types.h> | |
5 | #include <linux/spinlock.h> | |
2d651289 AS |
6 | #include <linux/debugfs.h> |
7 | #include <linux/seq_file.h> | |
8 | #include <linux/uaccess.h> | |
e443b333 AS |
9 | #include <linux/usb/ch9.h> |
10 | #include <linux/usb/gadget.h> | |
88bdffc8 LJ |
11 | #include <linux/usb/phy.h> |
12 | #include <linux/usb/otg.h> | |
13 | #include <linux/usb/otg-fsm.h> | |
b0930d4c | 14 | #include <linux/usb/chipidea.h> |
e443b333 AS |
15 | |
16 | #include "ci.h" | |
17 | #include "udc.h" | |
18 | #include "bits.h" | |
c4a8b639 | 19 | #include "otg.h" |
e443b333 | 20 | |
e443b333 | 21 | /** |
2d651289 | 22 | * ci_device_show: prints information about device capabilities and status |
e443b333 | 23 | */ |
2d651289 | 24 | static int ci_device_show(struct seq_file *s, void *data) |
e443b333 | 25 | { |
8e22978c | 26 | struct ci_hdrc *ci = s->private; |
2d651289 | 27 | struct usb_gadget *gadget = &ci->gadget; |
e443b333 | 28 | |
2d651289 AS |
29 | seq_printf(s, "speed = %d\n", gadget->speed); |
30 | seq_printf(s, "max_speed = %d\n", gadget->max_speed); | |
31 | seq_printf(s, "is_otg = %d\n", gadget->is_otg); | |
32 | seq_printf(s, "is_a_peripheral = %d\n", gadget->is_a_peripheral); | |
33 | seq_printf(s, "b_hnp_enable = %d\n", gadget->b_hnp_enable); | |
34 | seq_printf(s, "a_hnp_support = %d\n", gadget->a_hnp_support); | |
35 | seq_printf(s, "a_alt_hnp_support = %d\n", gadget->a_alt_hnp_support); | |
36 | seq_printf(s, "name = %s\n", | |
37 | (gadget->name ? gadget->name : "")); | |
38 | ||
39 | if (!ci->driver) | |
40 | return 0; | |
e443b333 | 41 | |
2d651289 AS |
42 | seq_printf(s, "gadget function = %s\n", |
43 | (ci->driver->function ? ci->driver->function : "")); | |
44 | seq_printf(s, "gadget max speed = %d\n", ci->driver->max_speed); | |
e443b333 | 45 | |
e443b333 AS |
46 | return 0; |
47 | } | |
48 | ||
2d651289 | 49 | static int ci_device_open(struct inode *inode, struct file *file) |
e443b333 | 50 | { |
2d651289 | 51 | return single_open(file, ci_device_show, inode->i_private); |
e443b333 AS |
52 | } |
53 | ||
2d651289 AS |
54 | static const struct file_operations ci_device_fops = { |
55 | .open = ci_device_open, | |
56 | .read = seq_read, | |
57 | .llseek = seq_lseek, | |
58 | .release = single_release, | |
59 | }; | |
e443b333 | 60 | |
e443b333 | 61 | /** |
2d651289 | 62 | * ci_port_test_show: reads port test mode |
e443b333 | 63 | */ |
2d651289 | 64 | static int ci_port_test_show(struct seq_file *s, void *data) |
e443b333 | 65 | { |
8e22978c | 66 | struct ci_hdrc *ci = s->private; |
e443b333 AS |
67 | unsigned long flags; |
68 | unsigned mode; | |
69 | ||
bc249379 | 70 | pm_runtime_get_sync(ci->dev); |
26c696c6 RZ |
71 | spin_lock_irqsave(&ci->lock, flags); |
72 | mode = hw_port_test_get(ci); | |
73 | spin_unlock_irqrestore(&ci->lock, flags); | |
bc249379 | 74 | pm_runtime_put_sync(ci->dev); |
e443b333 | 75 | |
2d651289 AS |
76 | seq_printf(s, "mode = %u\n", mode); |
77 | ||
78 | return 0; | |
e443b333 AS |
79 | } |
80 | ||
81 | /** | |
2d651289 | 82 | * ci_port_test_write: writes port test mode |
e443b333 | 83 | */ |
2d651289 AS |
84 | static ssize_t ci_port_test_write(struct file *file, const char __user *ubuf, |
85 | size_t count, loff_t *ppos) | |
e443b333 | 86 | { |
2d651289 | 87 | struct seq_file *s = file->private_data; |
8e22978c | 88 | struct ci_hdrc *ci = s->private; |
e443b333 AS |
89 | unsigned long flags; |
90 | unsigned mode; | |
2d651289 AS |
91 | char buf[32]; |
92 | int ret; | |
e443b333 | 93 | |
bd5fb0ae HS |
94 | count = min_t(size_t, sizeof(buf) - 1, count); |
95 | if (copy_from_user(buf, ubuf, count)) | |
2d651289 | 96 | return -EFAULT; |
e443b333 | 97 | |
bd5fb0ae HS |
98 | /* sscanf requires a zero terminated string */ |
99 | buf[count] = '\0'; | |
100 | ||
2d651289 AS |
101 | if (sscanf(buf, "%u", &mode) != 1) |
102 | return -EINVAL; | |
e443b333 | 103 | |
3c724888 A |
104 | if (mode > 255) |
105 | return -EBADRQC; | |
106 | ||
bc249379 | 107 | pm_runtime_get_sync(ci->dev); |
26c696c6 | 108 | spin_lock_irqsave(&ci->lock, flags); |
2d651289 | 109 | ret = hw_port_test_set(ci, mode); |
26c696c6 | 110 | spin_unlock_irqrestore(&ci->lock, flags); |
bc249379 | 111 | pm_runtime_put_sync(ci->dev); |
e443b333 | 112 | |
2d651289 | 113 | return ret ? ret : count; |
e443b333 | 114 | } |
2d651289 AS |
115 | |
116 | static int ci_port_test_open(struct inode *inode, struct file *file) | |
117 | { | |
118 | return single_open(file, ci_port_test_show, inode->i_private); | |
119 | } | |
120 | ||
121 | static const struct file_operations ci_port_test_fops = { | |
122 | .open = ci_port_test_open, | |
123 | .write = ci_port_test_write, | |
124 | .read = seq_read, | |
125 | .llseek = seq_lseek, | |
126 | .release = single_release, | |
127 | }; | |
e443b333 AS |
128 | |
129 | /** | |
2d651289 | 130 | * ci_qheads_show: DMA contents of all queue heads |
e443b333 | 131 | */ |
2d651289 | 132 | static int ci_qheads_show(struct seq_file *s, void *data) |
e443b333 | 133 | { |
8e22978c | 134 | struct ci_hdrc *ci = s->private; |
e443b333 | 135 | unsigned long flags; |
2d651289 | 136 | unsigned i, j; |
e443b333 | 137 | |
2d651289 AS |
138 | if (ci->role != CI_ROLE_GADGET) { |
139 | seq_printf(s, "not in gadget mode\n"); | |
e443b333 AS |
140 | return 0; |
141 | } | |
142 | ||
26c696c6 RZ |
143 | spin_lock_irqsave(&ci->lock, flags); |
144 | for (i = 0; i < ci->hw_ep_max/2; i++) { | |
8e22978c AS |
145 | struct ci_hw_ep *hweprx = &ci->ci_hw_ep[i]; |
146 | struct ci_hw_ep *hweptx = | |
147 | &ci->ci_hw_ep[i + ci->hw_ep_max/2]; | |
2d651289 | 148 | seq_printf(s, "EP=%02i: RX=%08X TX=%08X\n", |
2dbc5c4c | 149 | i, (u32)hweprx->qh.dma, (u32)hweptx->qh.dma); |
8e22978c | 150 | for (j = 0; j < (sizeof(struct ci_hw_qh)/sizeof(u32)); j++) |
2d651289 | 151 | seq_printf(s, " %04X: %08X %08X\n", j, |
2dbc5c4c AS |
152 | *((u32 *)hweprx->qh.ptr + j), |
153 | *((u32 *)hweptx->qh.ptr + j)); | |
e443b333 | 154 | } |
26c696c6 | 155 | spin_unlock_irqrestore(&ci->lock, flags); |
e443b333 | 156 | |
2d651289 | 157 | return 0; |
e443b333 | 158 | } |
e443b333 | 159 | |
2d651289 | 160 | static int ci_qheads_open(struct inode *inode, struct file *file) |
e443b333 | 161 | { |
2d651289 | 162 | return single_open(file, ci_qheads_show, inode->i_private); |
e443b333 AS |
163 | } |
164 | ||
2d651289 AS |
165 | static const struct file_operations ci_qheads_fops = { |
166 | .open = ci_qheads_open, | |
167 | .read = seq_read, | |
168 | .llseek = seq_lseek, | |
169 | .release = single_release, | |
170 | }; | |
e443b333 AS |
171 | |
172 | /** | |
2d651289 | 173 | * ci_requests_show: DMA contents of all requests currently queued (all endpts) |
e443b333 | 174 | */ |
2d651289 | 175 | static int ci_requests_show(struct seq_file *s, void *data) |
e443b333 | 176 | { |
8e22978c | 177 | struct ci_hdrc *ci = s->private; |
e443b333 | 178 | unsigned long flags; |
8e22978c | 179 | struct ci_hw_req *req = NULL; |
cc9e6c49 | 180 | struct td_node *node, *tmpnode; |
8e22978c | 181 | unsigned i, j, qsize = sizeof(struct ci_hw_td)/sizeof(u32); |
e443b333 | 182 | |
2d651289 AS |
183 | if (ci->role != CI_ROLE_GADGET) { |
184 | seq_printf(s, "not in gadget mode\n"); | |
e443b333 AS |
185 | return 0; |
186 | } | |
187 | ||
26c696c6 RZ |
188 | spin_lock_irqsave(&ci->lock, flags); |
189 | for (i = 0; i < ci->hw_ep_max; i++) | |
32540ba2 | 190 | list_for_each_entry(req, &ci->ci_hw_ep[i].qh.queue, queue) { |
cc9e6c49 MG |
191 | list_for_each_entry_safe(node, tmpnode, &req->tds, td) { |
192 | seq_printf(s, "EP=%02i: TD=%08X %s\n", | |
193 | i % (ci->hw_ep_max / 2), | |
194 | (u32)node->dma, | |
195 | ((i < ci->hw_ep_max/2) ? | |
196 | "RX" : "TX")); | |
197 | ||
198 | for (j = 0; j < qsize; j++) | |
199 | seq_printf(s, " %04X: %08X\n", j, | |
200 | *((u32 *)node->ptr + j)); | |
201 | } | |
e443b333 | 202 | } |
26c696c6 | 203 | spin_unlock_irqrestore(&ci->lock, flags); |
e443b333 | 204 | |
2d651289 AS |
205 | return 0; |
206 | } | |
207 | ||
208 | static int ci_requests_open(struct inode *inode, struct file *file) | |
209 | { | |
210 | return single_open(file, ci_requests_show, inode->i_private); | |
e443b333 | 211 | } |
2d651289 AS |
212 | |
213 | static const struct file_operations ci_requests_fops = { | |
214 | .open = ci_requests_open, | |
215 | .read = seq_read, | |
216 | .llseek = seq_lseek, | |
217 | .release = single_release, | |
218 | }; | |
e443b333 | 219 | |
df40f8d3 | 220 | static int ci_otg_show(struct seq_file *s, void *unused) |
88bdffc8 LJ |
221 | { |
222 | struct ci_hdrc *ci = s->private; | |
223 | struct otg_fsm *fsm; | |
224 | ||
225 | if (!ci || !ci_otg_is_fsm_mode(ci)) | |
226 | return 0; | |
227 | ||
228 | fsm = &ci->fsm; | |
229 | ||
230 | /* ------ State ----- */ | |
231 | seq_printf(s, "OTG state: %s\n\n", | |
ef44cb42 | 232 | usb_otg_state_string(ci->otg.state)); |
88bdffc8 LJ |
233 | |
234 | /* ------ State Machine Variables ----- */ | |
235 | seq_printf(s, "a_bus_drop: %d\n", fsm->a_bus_drop); | |
236 | ||
237 | seq_printf(s, "a_bus_req: %d\n", fsm->a_bus_req); | |
238 | ||
239 | seq_printf(s, "a_srp_det: %d\n", fsm->a_srp_det); | |
240 | ||
241 | seq_printf(s, "a_vbus_vld: %d\n", fsm->a_vbus_vld); | |
242 | ||
243 | seq_printf(s, "b_conn: %d\n", fsm->b_conn); | |
244 | ||
245 | seq_printf(s, "adp_change: %d\n", fsm->adp_change); | |
246 | ||
247 | seq_printf(s, "power_up: %d\n", fsm->power_up); | |
248 | ||
249 | seq_printf(s, "a_bus_resume: %d\n", fsm->a_bus_resume); | |
250 | ||
251 | seq_printf(s, "a_bus_suspend: %d\n", fsm->a_bus_suspend); | |
252 | ||
253 | seq_printf(s, "a_conn: %d\n", fsm->a_conn); | |
254 | ||
255 | seq_printf(s, "b_bus_req: %d\n", fsm->b_bus_req); | |
256 | ||
257 | seq_printf(s, "b_bus_suspend: %d\n", fsm->b_bus_suspend); | |
258 | ||
259 | seq_printf(s, "b_se0_srp: %d\n", fsm->b_se0_srp); | |
260 | ||
261 | seq_printf(s, "b_ssend_srp: %d\n", fsm->b_ssend_srp); | |
262 | ||
263 | seq_printf(s, "b_sess_vld: %d\n", fsm->b_sess_vld); | |
264 | ||
265 | seq_printf(s, "b_srp_done: %d\n", fsm->b_srp_done); | |
266 | ||
267 | seq_printf(s, "drv_vbus: %d\n", fsm->drv_vbus); | |
268 | ||
269 | seq_printf(s, "loc_conn: %d\n", fsm->loc_conn); | |
270 | ||
271 | seq_printf(s, "loc_sof: %d\n", fsm->loc_sof); | |
272 | ||
273 | seq_printf(s, "adp_prb: %d\n", fsm->adp_prb); | |
274 | ||
275 | seq_printf(s, "id: %d\n", fsm->id); | |
276 | ||
277 | seq_printf(s, "protocol: %d\n", fsm->protocol); | |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
282 | static int ci_otg_open(struct inode *inode, struct file *file) | |
283 | { | |
284 | return single_open(file, ci_otg_show, inode->i_private); | |
285 | } | |
286 | ||
287 | static const struct file_operations ci_otg_fops = { | |
288 | .open = ci_otg_open, | |
289 | .read = seq_read, | |
290 | .llseek = seq_lseek, | |
291 | .release = single_release, | |
292 | }; | |
293 | ||
c8e333a3 AS |
294 | static int ci_role_show(struct seq_file *s, void *data) |
295 | { | |
8e22978c | 296 | struct ci_hdrc *ci = s->private; |
c8e333a3 | 297 | |
0340ff83 MT |
298 | if (ci->role != CI_ROLE_END) |
299 | seq_printf(s, "%s\n", ci_role(ci)->name); | |
c8e333a3 AS |
300 | |
301 | return 0; | |
302 | } | |
303 | ||
304 | static ssize_t ci_role_write(struct file *file, const char __user *ubuf, | |
305 | size_t count, loff_t *ppos) | |
306 | { | |
307 | struct seq_file *s = file->private_data; | |
8e22978c | 308 | struct ci_hdrc *ci = s->private; |
c8e333a3 AS |
309 | enum ci_role role; |
310 | char buf[8]; | |
311 | int ret; | |
312 | ||
313 | if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) | |
314 | return -EFAULT; | |
315 | ||
316 | for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++) | |
317 | if (ci->roles[role] && | |
318 | !strncmp(buf, ci->roles[role]->name, | |
319 | strlen(ci->roles[role]->name))) | |
320 | break; | |
321 | ||
322 | if (role == CI_ROLE_END || role == ci->role) | |
323 | return -EINVAL; | |
324 | ||
bc249379 | 325 | pm_runtime_get_sync(ci->dev); |
251b3c8b | 326 | disable_irq(ci->irq); |
c8e333a3 AS |
327 | ci_role_stop(ci); |
328 | ret = ci_role_start(ci, role); | |
251b3c8b | 329 | enable_irq(ci->irq); |
bc249379 | 330 | pm_runtime_put_sync(ci->dev); |
c8e333a3 AS |
331 | |
332 | return ret ? ret : count; | |
333 | } | |
334 | ||
335 | static int ci_role_open(struct inode *inode, struct file *file) | |
336 | { | |
337 | return single_open(file, ci_role_show, inode->i_private); | |
338 | } | |
339 | ||
340 | static const struct file_operations ci_role_fops = { | |
341 | .open = ci_role_open, | |
342 | .write = ci_role_write, | |
343 | .read = seq_read, | |
344 | .llseek = seq_lseek, | |
345 | .release = single_release, | |
346 | }; | |
347 | ||
df40f8d3 | 348 | static int ci_registers_show(struct seq_file *s, void *unused) |
c4a8b639 LJ |
349 | { |
350 | struct ci_hdrc *ci = s->private; | |
351 | u32 tmp_reg; | |
352 | ||
0c4d6af4 LJ |
353 | if (!ci || ci->in_lpm) |
354 | return -EPERM; | |
c4a8b639 LJ |
355 | |
356 | /* ------ Registers ----- */ | |
357 | tmp_reg = hw_read_intr_enable(ci); | |
358 | seq_printf(s, "USBINTR reg: %08x\n", tmp_reg); | |
359 | ||
360 | tmp_reg = hw_read_intr_status(ci); | |
361 | seq_printf(s, "USBSTS reg: %08x\n", tmp_reg); | |
362 | ||
363 | tmp_reg = hw_read(ci, OP_USBMODE, ~0); | |
364 | seq_printf(s, "USBMODE reg: %08x\n", tmp_reg); | |
365 | ||
366 | tmp_reg = hw_read(ci, OP_USBCMD, ~0); | |
367 | seq_printf(s, "USBCMD reg: %08x\n", tmp_reg); | |
368 | ||
369 | tmp_reg = hw_read(ci, OP_PORTSC, ~0); | |
370 | seq_printf(s, "PORTSC reg: %08x\n", tmp_reg); | |
371 | ||
372 | if (ci->is_otg) { | |
373 | tmp_reg = hw_read_otgsc(ci, ~0); | |
374 | seq_printf(s, "OTGSC reg: %08x\n", tmp_reg); | |
375 | } | |
376 | ||
377 | return 0; | |
378 | } | |
379 | ||
380 | static int ci_registers_open(struct inode *inode, struct file *file) | |
381 | { | |
382 | return single_open(file, ci_registers_show, inode->i_private); | |
383 | } | |
384 | ||
385 | static const struct file_operations ci_registers_fops = { | |
386 | .open = ci_registers_open, | |
387 | .read = seq_read, | |
388 | .llseek = seq_lseek, | |
389 | .release = single_release, | |
390 | }; | |
391 | ||
e443b333 AS |
392 | /** |
393 | * dbg_create_files: initializes the attribute interface | |
2d651289 | 394 | * @ci: device |
e443b333 AS |
395 | * |
396 | * This function returns an error code | |
397 | */ | |
8e22978c | 398 | int dbg_create_files(struct ci_hdrc *ci) |
e443b333 | 399 | { |
2d651289 AS |
400 | struct dentry *dent; |
401 | ||
402 | ci->debugfs = debugfs_create_dir(dev_name(ci->dev), NULL); | |
403 | if (!ci->debugfs) | |
404 | return -ENOMEM; | |
405 | ||
406 | dent = debugfs_create_file("device", S_IRUGO, ci->debugfs, ci, | |
407 | &ci_device_fops); | |
408 | if (!dent) | |
409 | goto err; | |
410 | ||
411 | dent = debugfs_create_file("port_test", S_IRUGO | S_IWUSR, ci->debugfs, | |
412 | ci, &ci_port_test_fops); | |
413 | if (!dent) | |
414 | goto err; | |
415 | ||
416 | dent = debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci, | |
417 | &ci_qheads_fops); | |
418 | if (!dent) | |
419 | goto err; | |
420 | ||
421 | dent = debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci, | |
422 | &ci_requests_fops); | |
c8e333a3 AS |
423 | if (!dent) |
424 | goto err; | |
425 | ||
88bdffc8 LJ |
426 | if (ci_otg_is_fsm_mode(ci)) { |
427 | dent = debugfs_create_file("otg", S_IRUGO, ci->debugfs, ci, | |
428 | &ci_otg_fops); | |
429 | if (!dent) | |
430 | goto err; | |
431 | } | |
432 | ||
c8e333a3 AS |
433 | dent = debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci, |
434 | &ci_role_fops); | |
c4a8b639 LJ |
435 | if (!dent) |
436 | goto err; | |
437 | ||
438 | dent = debugfs_create_file("registers", S_IRUGO, ci->debugfs, ci, | |
439 | &ci_registers_fops); | |
440 | ||
2d651289 AS |
441 | if (dent) |
442 | return 0; | |
443 | err: | |
444 | debugfs_remove_recursive(ci->debugfs); | |
445 | return -ENOMEM; | |
e443b333 AS |
446 | } |
447 | ||
448 | /** | |
449 | * dbg_remove_files: destroys the attribute interface | |
2d651289 | 450 | * @ci: device |
e443b333 | 451 | */ |
8e22978c | 452 | void dbg_remove_files(struct ci_hdrc *ci) |
e443b333 | 453 | { |
2d651289 | 454 | debugfs_remove_recursive(ci->debugfs); |
e443b333 | 455 | } |