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 ci_hw_req *req = NULL;
179 struct td_node *node, *tmpnode;
180 unsigned i, j, qsize = sizeof(struct ci_hw_td)/sizeof(u32);
182 if (ci->role != CI_ROLE_GADGET) {
183 seq_printf(s, "not in gadget mode\n");
187 spin_lock_irqsave(&ci->lock, flags);
188 for (i = 0; i < ci->hw_ep_max; i++)
189 list_for_each_entry(req, &ci->ci_hw_ep[i].qh.queue, queue) {
190 list_for_each_entry_safe(node, tmpnode, &req->tds, td) {
191 seq_printf(s, "EP=%02i: TD=%08X %s\n",
192 i % (ci->hw_ep_max / 2),
194 ((i < ci->hw_ep_max/2) ?
197 for (j = 0; j < qsize; j++)
198 seq_printf(s, " %04X: %08X\n", j,
199 *((u32 *)node->ptr + j));
202 spin_unlock_irqrestore(&ci->lock, flags);
207 static int ci_requests_open(struct inode *inode, struct file *file)
209 return single_open(file, ci_requests_show, inode->i_private);
212 static const struct file_operations ci_requests_fops = {
213 .open = ci_requests_open,
216 .release = single_release,
219 static int ci_otg_show(struct seq_file *s, void *unused)
221 struct ci_hdrc *ci = s->private;
224 if (!ci || !ci_otg_is_fsm_mode(ci))
229 /* ------ State ----- */
230 seq_printf(s, "OTG state: %s\n\n",
231 usb_otg_state_string(ci->otg.state));
233 /* ------ State Machine Variables ----- */
234 seq_printf(s, "a_bus_drop: %d\n", fsm->a_bus_drop);
236 seq_printf(s, "a_bus_req: %d\n", fsm->a_bus_req);
238 seq_printf(s, "a_srp_det: %d\n", fsm->a_srp_det);
240 seq_printf(s, "a_vbus_vld: %d\n", fsm->a_vbus_vld);
242 seq_printf(s, "b_conn: %d\n", fsm->b_conn);
244 seq_printf(s, "adp_change: %d\n", fsm->adp_change);
246 seq_printf(s, "power_up: %d\n", fsm->power_up);
248 seq_printf(s, "a_bus_resume: %d\n", fsm->a_bus_resume);
250 seq_printf(s, "a_bus_suspend: %d\n", fsm->a_bus_suspend);
252 seq_printf(s, "a_conn: %d\n", fsm->a_conn);
254 seq_printf(s, "b_bus_req: %d\n", fsm->b_bus_req);
256 seq_printf(s, "b_bus_suspend: %d\n", fsm->b_bus_suspend);
258 seq_printf(s, "b_se0_srp: %d\n", fsm->b_se0_srp);
260 seq_printf(s, "b_ssend_srp: %d\n", fsm->b_ssend_srp);
262 seq_printf(s, "b_sess_vld: %d\n", fsm->b_sess_vld);
264 seq_printf(s, "b_srp_done: %d\n", fsm->b_srp_done);
266 seq_printf(s, "drv_vbus: %d\n", fsm->drv_vbus);
268 seq_printf(s, "loc_conn: %d\n", fsm->loc_conn);
270 seq_printf(s, "loc_sof: %d\n", fsm->loc_sof);
272 seq_printf(s, "adp_prb: %d\n", fsm->adp_prb);
274 seq_printf(s, "id: %d\n", fsm->id);
276 seq_printf(s, "protocol: %d\n", fsm->protocol);
281 static int ci_otg_open(struct inode *inode, struct file *file)
283 return single_open(file, ci_otg_show, inode->i_private);
286 static const struct file_operations ci_otg_fops = {
290 .release = single_release,
293 static int ci_role_show(struct seq_file *s, void *data)
295 struct ci_hdrc *ci = s->private;
297 seq_printf(s, "%s\n", ci_role(ci)->name);
302 static ssize_t ci_role_write(struct file *file, const char __user *ubuf,
303 size_t count, loff_t *ppos)
305 struct seq_file *s = file->private_data;
306 struct ci_hdrc *ci = s->private;
311 if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
314 for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++)
315 if (ci->roles[role] &&
316 !strncmp(buf, ci->roles[role]->name,
317 strlen(ci->roles[role]->name)))
320 if (role == CI_ROLE_END || role == ci->role)
323 pm_runtime_get_sync(ci->dev);
324 disable_irq(ci->irq);
326 ret = ci_role_start(ci, role);
328 pm_runtime_put_sync(ci->dev);
330 return ret ? ret : count;
333 static int ci_role_open(struct inode *inode, struct file *file)
335 return single_open(file, ci_role_show, inode->i_private);
338 static const struct file_operations ci_role_fops = {
339 .open = ci_role_open,
340 .write = ci_role_write,
343 .release = single_release,
346 static int ci_registers_show(struct seq_file *s, void *unused)
348 struct ci_hdrc *ci = s->private;
351 if (!ci || ci->in_lpm)
354 /* ------ Registers ----- */
355 tmp_reg = hw_read_intr_enable(ci);
356 seq_printf(s, "USBINTR reg: %08x\n", tmp_reg);
358 tmp_reg = hw_read_intr_status(ci);
359 seq_printf(s, "USBSTS reg: %08x\n", tmp_reg);
361 tmp_reg = hw_read(ci, OP_USBMODE, ~0);
362 seq_printf(s, "USBMODE reg: %08x\n", tmp_reg);
364 tmp_reg = hw_read(ci, OP_USBCMD, ~0);
365 seq_printf(s, "USBCMD reg: %08x\n", tmp_reg);
367 tmp_reg = hw_read(ci, OP_PORTSC, ~0);
368 seq_printf(s, "PORTSC reg: %08x\n", tmp_reg);
371 tmp_reg = hw_read_otgsc(ci, ~0);
372 seq_printf(s, "OTGSC reg: %08x\n", tmp_reg);
378 static int ci_registers_open(struct inode *inode, struct file *file)
380 return single_open(file, ci_registers_show, inode->i_private);
383 static const struct file_operations ci_registers_fops = {
384 .open = ci_registers_open,
387 .release = single_release,
391 * dbg_create_files: initializes the attribute interface
394 * This function returns an error code
396 int dbg_create_files(struct ci_hdrc *ci)
400 ci->debugfs = debugfs_create_dir(dev_name(ci->dev), NULL);
404 dent = debugfs_create_file("device", S_IRUGO, ci->debugfs, ci,
409 dent = debugfs_create_file("port_test", S_IRUGO | S_IWUSR, ci->debugfs,
410 ci, &ci_port_test_fops);
414 dent = debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci,
419 dent = debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci,
424 if (ci_otg_is_fsm_mode(ci)) {
425 dent = debugfs_create_file("otg", S_IRUGO, ci->debugfs, ci,
431 dent = debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci,
436 dent = debugfs_create_file("registers", S_IRUGO, ci->debugfs, ci,
442 debugfs_remove_recursive(ci->debugfs);
447 * dbg_remove_files: destroys the attribute interface
450 void dbg_remove_files(struct ci_hdrc *ci)
452 debugfs_remove_recursive(ci->debugfs);