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>
17 * ci_device_show: prints information about device capabilities and status
19 static int ci_device_show(struct seq_file *s, void *data)
21 struct ci_hdrc *ci = s->private;
22 struct usb_gadget *gadget = &ci->gadget;
24 seq_printf(s, "speed = %d\n", gadget->speed);
25 seq_printf(s, "max_speed = %d\n", gadget->max_speed);
26 seq_printf(s, "is_otg = %d\n", gadget->is_otg);
27 seq_printf(s, "is_a_peripheral = %d\n", gadget->is_a_peripheral);
28 seq_printf(s, "b_hnp_enable = %d\n", gadget->b_hnp_enable);
29 seq_printf(s, "a_hnp_support = %d\n", gadget->a_hnp_support);
30 seq_printf(s, "a_alt_hnp_support = %d\n", gadget->a_alt_hnp_support);
31 seq_printf(s, "name = %s\n",
32 (gadget->name ? gadget->name : ""));
37 seq_printf(s, "gadget function = %s\n",
38 (ci->driver->function ? ci->driver->function : ""));
39 seq_printf(s, "gadget max speed = %d\n", ci->driver->max_speed);
44 static int ci_device_open(struct inode *inode, struct file *file)
46 return single_open(file, ci_device_show, inode->i_private);
49 static const struct file_operations ci_device_fops = {
50 .open = ci_device_open,
53 .release = single_release,
57 * ci_port_test_show: reads port test mode
59 static int ci_port_test_show(struct seq_file *s, void *data)
61 struct ci_hdrc *ci = s->private;
65 spin_lock_irqsave(&ci->lock, flags);
66 mode = hw_port_test_get(ci);
67 spin_unlock_irqrestore(&ci->lock, flags);
69 seq_printf(s, "mode = %u\n", mode);
75 * ci_port_test_write: writes port test mode
77 static ssize_t ci_port_test_write(struct file *file, const char __user *ubuf,
78 size_t count, loff_t *ppos)
80 struct seq_file *s = file->private_data;
81 struct ci_hdrc *ci = s->private;
87 if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
90 if (sscanf(buf, "%u", &mode) != 1)
93 spin_lock_irqsave(&ci->lock, flags);
94 ret = hw_port_test_set(ci, mode);
95 spin_unlock_irqrestore(&ci->lock, flags);
97 return ret ? ret : count;
100 static int ci_port_test_open(struct inode *inode, struct file *file)
102 return single_open(file, ci_port_test_show, inode->i_private);
105 static const struct file_operations ci_port_test_fops = {
106 .open = ci_port_test_open,
107 .write = ci_port_test_write,
110 .release = single_release,
114 * ci_qheads_show: DMA contents of all queue heads
116 static int ci_qheads_show(struct seq_file *s, void *data)
118 struct ci_hdrc *ci = s->private;
122 if (ci->role != CI_ROLE_GADGET) {
123 seq_printf(s, "not in gadget mode\n");
127 spin_lock_irqsave(&ci->lock, flags);
128 for (i = 0; i < ci->hw_ep_max/2; i++) {
129 struct ci_hw_ep *hweprx = &ci->ci_hw_ep[i];
130 struct ci_hw_ep *hweptx =
131 &ci->ci_hw_ep[i + ci->hw_ep_max/2];
132 seq_printf(s, "EP=%02i: RX=%08X TX=%08X\n",
133 i, (u32)hweprx->qh.dma, (u32)hweptx->qh.dma);
134 for (j = 0; j < (sizeof(struct ci_hw_qh)/sizeof(u32)); j++)
135 seq_printf(s, " %04X: %08X %08X\n", j,
136 *((u32 *)hweprx->qh.ptr + j),
137 *((u32 *)hweptx->qh.ptr + j));
139 spin_unlock_irqrestore(&ci->lock, flags);
144 static int ci_qheads_open(struct inode *inode, struct file *file)
146 return single_open(file, ci_qheads_show, inode->i_private);
149 static const struct file_operations ci_qheads_fops = {
150 .open = ci_qheads_open,
153 .release = single_release,
157 * ci_requests_show: DMA contents of all requests currently queued (all endpts)
159 static int ci_requests_show(struct seq_file *s, void *data)
161 struct ci_hdrc *ci = s->private;
163 struct list_head *ptr = NULL;
164 struct ci_hw_req *req = NULL;
165 struct td_node *node, *tmpnode;
166 unsigned i, j, qsize = sizeof(struct ci_hw_td)/sizeof(u32);
168 if (ci->role != CI_ROLE_GADGET) {
169 seq_printf(s, "not in gadget mode\n");
173 spin_lock_irqsave(&ci->lock, flags);
174 for (i = 0; i < ci->hw_ep_max; i++)
175 list_for_each(ptr, &ci->ci_hw_ep[i].qh.queue) {
176 req = list_entry(ptr, struct ci_hw_req, queue);
178 list_for_each_entry_safe(node, tmpnode, &req->tds, td) {
179 seq_printf(s, "EP=%02i: TD=%08X %s\n",
180 i % (ci->hw_ep_max / 2),
182 ((i < ci->hw_ep_max/2) ?
185 for (j = 0; j < qsize; j++)
186 seq_printf(s, " %04X: %08X\n", j,
187 *((u32 *)node->ptr + j));
190 spin_unlock_irqrestore(&ci->lock, flags);
195 static int ci_requests_open(struct inode *inode, struct file *file)
197 return single_open(file, ci_requests_show, inode->i_private);
200 static const struct file_operations ci_requests_fops = {
201 .open = ci_requests_open,
204 .release = single_release,
207 static int ci_role_show(struct seq_file *s, void *data)
209 struct ci_hdrc *ci = s->private;
211 seq_printf(s, "%s\n", ci_role(ci)->name);
216 static ssize_t ci_role_write(struct file *file, const char __user *ubuf,
217 size_t count, loff_t *ppos)
219 struct seq_file *s = file->private_data;
220 struct ci_hdrc *ci = s->private;
225 if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
228 for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++)
229 if (ci->roles[role] &&
230 !strncmp(buf, ci->roles[role]->name,
231 strlen(ci->roles[role]->name)))
234 if (role == CI_ROLE_END || role == ci->role)
238 ret = ci_role_start(ci, role);
240 return ret ? ret : count;
243 static int ci_role_open(struct inode *inode, struct file *file)
245 return single_open(file, ci_role_show, inode->i_private);
248 static const struct file_operations ci_role_fops = {
249 .open = ci_role_open,
250 .write = ci_role_write,
253 .release = single_release,
257 * dbg_create_files: initializes the attribute interface
260 * This function returns an error code
262 int dbg_create_files(struct ci_hdrc *ci)
266 ci->debugfs = debugfs_create_dir(dev_name(ci->dev), NULL);
270 dent = debugfs_create_file("device", S_IRUGO, ci->debugfs, ci,
275 dent = debugfs_create_file("port_test", S_IRUGO | S_IWUSR, ci->debugfs,
276 ci, &ci_port_test_fops);
280 dent = debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci,
285 dent = debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci,
290 dent = debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci,
295 debugfs_remove_recursive(ci->debugfs);
300 * dbg_remove_files: destroys the attribute interface
303 void dbg_remove_files(struct ci_hdrc *ci)
305 debugfs_remove_recursive(ci->debugfs);