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 #include <linux/usb/chipidea.h>
21 * ci_device_show: prints information about device capabilities and status
23 static int ci_device_show(struct seq_file *s, void *data)
25 struct ci_hdrc *ci = s->private;
26 struct usb_gadget *gadget = &ci->gadget;
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 : ""));
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);
48 static int ci_device_open(struct inode *inode, struct file *file)
50 return single_open(file, ci_device_show, inode->i_private);
53 static const struct file_operations ci_device_fops = {
54 .open = ci_device_open,
57 .release = single_release,
61 * ci_port_test_show: reads port test mode
63 static int ci_port_test_show(struct seq_file *s, void *data)
65 struct ci_hdrc *ci = s->private;
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);
75 seq_printf(s, "mode = %u\n", mode);
81 * ci_port_test_write: writes port test mode
83 static ssize_t ci_port_test_write(struct file *file, const char __user *ubuf,
84 size_t count, loff_t *ppos)
86 struct seq_file *s = file->private_data;
87 struct ci_hdrc *ci = s->private;
93 count = min_t(size_t, sizeof(buf) - 1, count);
94 if (copy_from_user(buf, ubuf, count))
97 /* sscanf requires a zero terminated string */
100 if (sscanf(buf, "%u", &mode) != 1)
106 pm_runtime_get_sync(ci->dev);
107 spin_lock_irqsave(&ci->lock, flags);
108 ret = hw_port_test_set(ci, mode);
109 spin_unlock_irqrestore(&ci->lock, flags);
110 pm_runtime_put_sync(ci->dev);
112 return ret ? ret : count;
115 static int ci_port_test_open(struct inode *inode, struct file *file)
117 return single_open(file, ci_port_test_show, inode->i_private);
120 static const struct file_operations ci_port_test_fops = {
121 .open = ci_port_test_open,
122 .write = ci_port_test_write,
125 .release = single_release,
129 * ci_qheads_show: DMA contents of all queue heads
131 static int ci_qheads_show(struct seq_file *s, void *data)
133 struct ci_hdrc *ci = s->private;
137 if (ci->role != CI_ROLE_GADGET) {
138 seq_printf(s, "not in gadget mode\n");
142 spin_lock_irqsave(&ci->lock, flags);
143 for (i = 0; i < ci->hw_ep_max/2; i++) {
144 struct ci_hw_ep *hweprx = &ci->ci_hw_ep[i];
145 struct ci_hw_ep *hweptx =
146 &ci->ci_hw_ep[i + ci->hw_ep_max/2];
147 seq_printf(s, "EP=%02i: RX=%08X TX=%08X\n",
148 i, (u32)hweprx->qh.dma, (u32)hweptx->qh.dma);
149 for (j = 0; j < (sizeof(struct ci_hw_qh)/sizeof(u32)); j++)
150 seq_printf(s, " %04X: %08X %08X\n", j,
151 *((u32 *)hweprx->qh.ptr + j),
152 *((u32 *)hweptx->qh.ptr + j));
154 spin_unlock_irqrestore(&ci->lock, flags);
159 static int ci_qheads_open(struct inode *inode, struct file *file)
161 return single_open(file, ci_qheads_show, inode->i_private);
164 static const struct file_operations ci_qheads_fops = {
165 .open = ci_qheads_open,
168 .release = single_release,
172 * ci_requests_show: DMA contents of all requests currently queued (all endpts)
174 static int ci_requests_show(struct seq_file *s, void *data)
176 struct ci_hdrc *ci = s->private;
178 struct list_head *ptr = NULL;
179 struct ci_hw_req *req = NULL;
180 struct td_node *node, *tmpnode;
181 unsigned i, j, qsize = sizeof(struct ci_hw_td)/sizeof(u32);
183 if (ci->role != CI_ROLE_GADGET) {
184 seq_printf(s, "not in gadget mode\n");
188 spin_lock_irqsave(&ci->lock, flags);
189 for (i = 0; i < ci->hw_ep_max; i++)
190 list_for_each(ptr, &ci->ci_hw_ep[i].qh.queue) {
191 req = list_entry(ptr, struct ci_hw_req, queue);
193 list_for_each_entry_safe(node, tmpnode, &req->tds, td) {
194 seq_printf(s, "EP=%02i: TD=%08X %s\n",
195 i % (ci->hw_ep_max / 2),
197 ((i < ci->hw_ep_max/2) ?
200 for (j = 0; j < qsize; j++)
201 seq_printf(s, " %04X: %08X\n", j,
202 *((u32 *)node->ptr + j));
205 spin_unlock_irqrestore(&ci->lock, flags);
210 static int ci_requests_open(struct inode *inode, struct file *file)
212 return single_open(file, ci_requests_show, inode->i_private);
215 static const struct file_operations ci_requests_fops = {
216 .open = ci_requests_open,
219 .release = single_release,
222 static int ci_otg_show(struct seq_file *s, void *unused)
224 struct ci_hdrc *ci = s->private;
227 if (!ci || !ci_otg_is_fsm_mode(ci))
232 /* ------ State ----- */
233 seq_printf(s, "OTG state: %s\n\n",
234 usb_otg_state_string(ci->otg.state));
236 /* ------ State Machine Variables ----- */
237 seq_printf(s, "a_bus_drop: %d\n", fsm->a_bus_drop);
239 seq_printf(s, "a_bus_req: %d\n", fsm->a_bus_req);
241 seq_printf(s, "a_srp_det: %d\n", fsm->a_srp_det);
243 seq_printf(s, "a_vbus_vld: %d\n", fsm->a_vbus_vld);
245 seq_printf(s, "b_conn: %d\n", fsm->b_conn);
247 seq_printf(s, "adp_change: %d\n", fsm->adp_change);
249 seq_printf(s, "power_up: %d\n", fsm->power_up);
251 seq_printf(s, "a_bus_resume: %d\n", fsm->a_bus_resume);
253 seq_printf(s, "a_bus_suspend: %d\n", fsm->a_bus_suspend);
255 seq_printf(s, "a_conn: %d\n", fsm->a_conn);
257 seq_printf(s, "b_bus_req: %d\n", fsm->b_bus_req);
259 seq_printf(s, "b_bus_suspend: %d\n", fsm->b_bus_suspend);
261 seq_printf(s, "b_se0_srp: %d\n", fsm->b_se0_srp);
263 seq_printf(s, "b_ssend_srp: %d\n", fsm->b_ssend_srp);
265 seq_printf(s, "b_sess_vld: %d\n", fsm->b_sess_vld);
267 seq_printf(s, "b_srp_done: %d\n", fsm->b_srp_done);
269 seq_printf(s, "drv_vbus: %d\n", fsm->drv_vbus);
271 seq_printf(s, "loc_conn: %d\n", fsm->loc_conn);
273 seq_printf(s, "loc_sof: %d\n", fsm->loc_sof);
275 seq_printf(s, "adp_prb: %d\n", fsm->adp_prb);
277 seq_printf(s, "id: %d\n", fsm->id);
279 seq_printf(s, "protocol: %d\n", fsm->protocol);
284 static int ci_otg_open(struct inode *inode, struct file *file)
286 return single_open(file, ci_otg_show, inode->i_private);
289 static const struct file_operations ci_otg_fops = {
293 .release = single_release,
296 static int ci_role_show(struct seq_file *s, void *data)
298 struct ci_hdrc *ci = s->private;
300 seq_printf(s, "%s\n", ci_role(ci)->name);
305 static ssize_t ci_role_write(struct file *file, const char __user *ubuf,
306 size_t count, loff_t *ppos)
308 struct seq_file *s = file->private_data;
309 struct ci_hdrc *ci = s->private;
314 if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
317 for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++)
318 if (ci->roles[role] &&
319 !strncmp(buf, ci->roles[role]->name,
320 strlen(ci->roles[role]->name)))
323 if (role == CI_ROLE_END || role == ci->role)
326 pm_runtime_get_sync(ci->dev);
327 disable_irq(ci->irq);
329 ret = ci_role_start(ci, role);
331 pm_runtime_put_sync(ci->dev);
333 return ret ? ret : count;
336 static int ci_role_open(struct inode *inode, struct file *file)
338 return single_open(file, ci_role_show, inode->i_private);
341 static const struct file_operations ci_role_fops = {
342 .open = ci_role_open,
343 .write = ci_role_write,
346 .release = single_release,
349 static int ci_registers_show(struct seq_file *s, void *unused)
351 struct ci_hdrc *ci = s->private;
354 if (!ci || ci->in_lpm)
357 /* ------ Registers ----- */
358 tmp_reg = hw_read_intr_enable(ci);
359 seq_printf(s, "USBINTR reg: %08x\n", tmp_reg);
361 tmp_reg = hw_read_intr_status(ci);
362 seq_printf(s, "USBSTS reg: %08x\n", tmp_reg);
364 tmp_reg = hw_read(ci, OP_USBMODE, ~0);
365 seq_printf(s, "USBMODE reg: %08x\n", tmp_reg);
367 tmp_reg = hw_read(ci, OP_USBCMD, ~0);
368 seq_printf(s, "USBCMD reg: %08x\n", tmp_reg);
370 tmp_reg = hw_read(ci, OP_PORTSC, ~0);
371 seq_printf(s, "PORTSC reg: %08x\n", tmp_reg);
374 tmp_reg = hw_read_otgsc(ci, ~0);
375 seq_printf(s, "OTGSC reg: %08x\n", tmp_reg);
381 static int ci_registers_open(struct inode *inode, struct file *file)
383 return single_open(file, ci_registers_show, inode->i_private);
386 static const struct file_operations ci_registers_fops = {
387 .open = ci_registers_open,
390 .release = single_release,
394 * dbg_create_files: initializes the attribute interface
397 * This function returns an error code
399 int dbg_create_files(struct ci_hdrc *ci)
403 ci->debugfs = debugfs_create_dir(dev_name(ci->dev), NULL);
407 dent = debugfs_create_file("device", S_IRUGO, ci->debugfs, ci,
412 dent = debugfs_create_file("port_test", S_IRUGO | S_IWUSR, ci->debugfs,
413 ci, &ci_port_test_fops);
417 dent = debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci,
422 dent = debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci,
427 if (ci_otg_is_fsm_mode(ci)) {
428 dent = debugfs_create_file("otg", S_IRUGO, ci->debugfs, ci,
434 dent = debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci,
439 dent = debugfs_create_file("registers", S_IRUGO, ci->debugfs, ci,
445 debugfs_remove_recursive(ci->debugfs);
450 * dbg_remove_files: destroys the attribute interface
453 void dbg_remove_files(struct ci_hdrc *ci)
455 debugfs_remove_recursive(ci->debugfs);