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