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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
11#include "ci.h"
12#include "udc.h"
13#include "bits.h"
14#include "debug.h"
15
16/**
17 * ci_device_show: prints information about device capabilities and status
18 */
19static int ci_device_show(struct seq_file *s, void *data)
20{
21 struct ci_hdrc *ci = s->private;
22 struct usb_gadget *gadget = &ci->gadget;
23
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 : ""));
33
34 if (!ci->driver)
35 return 0;
36
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);
40
41 return 0;
42}
43
44static int ci_device_open(struct inode *inode, struct file *file)
45{
46 return single_open(file, ci_device_show, inode->i_private);
47}
48
49static const struct file_operations ci_device_fops = {
50 .open = ci_device_open,
51 .read = seq_read,
52 .llseek = seq_lseek,
53 .release = single_release,
54};
55
56/**
57 * ci_port_test_show: reads port test mode
58 */
59static int ci_port_test_show(struct seq_file *s, void *data)
60{
61 struct ci_hdrc *ci = s->private;
62 unsigned long flags;
63 unsigned mode;
64
65 spin_lock_irqsave(&ci->lock, flags);
66 mode = hw_port_test_get(ci);
67 spin_unlock_irqrestore(&ci->lock, flags);
68
69 seq_printf(s, "mode = %u\n", mode);
70
71 return 0;
72}
73
74/**
75 * ci_port_test_write: writes port test mode
76 */
77static ssize_t ci_port_test_write(struct file *file, const char __user *ubuf,
78 size_t count, loff_t *ppos)
79{
80 struct seq_file *s = file->private_data;
81 struct ci_hdrc *ci = s->private;
82 unsigned long flags;
83 unsigned mode;
84 char buf[32];
85 int ret;
86
87 if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
88 return -EFAULT;
89
90 if (sscanf(buf, "%u", &mode) != 1)
91 return -EINVAL;
92
93 spin_lock_irqsave(&ci->lock, flags);
94 ret = hw_port_test_set(ci, mode);
95 spin_unlock_irqrestore(&ci->lock, flags);
96
97 return ret ? ret : count;
98}
99
100static int ci_port_test_open(struct inode *inode, struct file *file)
101{
102 return single_open(file, ci_port_test_show, inode->i_private);
103}
104
105static const struct file_operations ci_port_test_fops = {
106 .open = ci_port_test_open,
107 .write = ci_port_test_write,
108 .read = seq_read,
109 .llseek = seq_lseek,
110 .release = single_release,
111};
112
113/**
114 * ci_qheads_show: DMA contents of all queue heads
115 */
116static int ci_qheads_show(struct seq_file *s, void *data)
117{
118 struct ci_hdrc *ci = s->private;
119 unsigned long flags;
120 unsigned i, j;
121
122 if (ci->role != CI_ROLE_GADGET) {
123 seq_printf(s, "not in gadget mode\n");
124 return 0;
125 }
126
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));
138 }
139 spin_unlock_irqrestore(&ci->lock, flags);
140
141 return 0;
142}
143
144static int ci_qheads_open(struct inode *inode, struct file *file)
145{
146 return single_open(file, ci_qheads_show, inode->i_private);
147}
148
149static const struct file_operations ci_qheads_fops = {
150 .open = ci_qheads_open,
151 .read = seq_read,
152 .llseek = seq_lseek,
153 .release = single_release,
154};
155
156/**
157 * ci_requests_show: DMA contents of all requests currently queued (all endpts)
158 */
159static int ci_requests_show(struct seq_file *s, void *data)
160{
161 struct ci_hdrc *ci = s->private;
162 unsigned long flags;
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);
167
168 if (ci->role != CI_ROLE_GADGET) {
169 seq_printf(s, "not in gadget mode\n");
170 return 0;
171 }
172
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);
177
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),
181 (u32)node->dma,
182 ((i < ci->hw_ep_max/2) ?
183 "RX" : "TX"));
184
185 for (j = 0; j < qsize; j++)
186 seq_printf(s, " %04X: %08X\n", j,
187 *((u32 *)node->ptr + j));
188 }
189 }
190 spin_unlock_irqrestore(&ci->lock, flags);
191
192 return 0;
193}
194
195static int ci_requests_open(struct inode *inode, struct file *file)
196{
197 return single_open(file, ci_requests_show, inode->i_private);
198}
199
200static const struct file_operations ci_requests_fops = {
201 .open = ci_requests_open,
202 .read = seq_read,
203 .llseek = seq_lseek,
204 .release = single_release,
205};
206
207static int ci_role_show(struct seq_file *s, void *data)
208{
209 struct ci_hdrc *ci = s->private;
210
211 seq_printf(s, "%s\n", ci_role(ci)->name);
212
213 return 0;
214}
215
216static ssize_t ci_role_write(struct file *file, const char __user *ubuf,
217 size_t count, loff_t *ppos)
218{
219 struct seq_file *s = file->private_data;
220 struct ci_hdrc *ci = s->private;
221 enum ci_role role;
222 char buf[8];
223 int ret;
224
225 if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
226 return -EFAULT;
227
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)))
232 break;
233
234 if (role == CI_ROLE_END || role == ci->role)
235 return -EINVAL;
236
237 ci_role_stop(ci);
238 ret = ci_role_start(ci, role);
239
240 return ret ? ret : count;
241}
242
243static int ci_role_open(struct inode *inode, struct file *file)
244{
245 return single_open(file, ci_role_show, inode->i_private);
246}
247
248static const struct file_operations ci_role_fops = {
249 .open = ci_role_open,
250 .write = ci_role_write,
251 .read = seq_read,
252 .llseek = seq_lseek,
253 .release = single_release,
254};
255
256/**
257 * dbg_create_files: initializes the attribute interface
258 * @ci: device
259 *
260 * This function returns an error code
261 */
262int dbg_create_files(struct ci_hdrc *ci)
263{
264 struct dentry *dent;
265
266 ci->debugfs = debugfs_create_dir(dev_name(ci->dev), NULL);
267 if (!ci->debugfs)
268 return -ENOMEM;
269
270 dent = debugfs_create_file("device", S_IRUGO, ci->debugfs, ci,
271 &ci_device_fops);
272 if (!dent)
273 goto err;
274
275 dent = debugfs_create_file("port_test", S_IRUGO | S_IWUSR, ci->debugfs,
276 ci, &ci_port_test_fops);
277 if (!dent)
278 goto err;
279
280 dent = debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci,
281 &ci_qheads_fops);
282 if (!dent)
283 goto err;
284
285 dent = debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci,
286 &ci_requests_fops);
287 if (!dent)
288 goto err;
289
290 dent = debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci,
291 &ci_role_fops);
292 if (dent)
293 return 0;
294err:
295 debugfs_remove_recursive(ci->debugfs);
296 return -ENOMEM;
297}
298
299/**
300 * dbg_remove_files: destroys the attribute interface
301 * @ci: device
302 */
303void dbg_remove_files(struct ci_hdrc *ci)
304{
305 debugfs_remove_recursive(ci->debugfs);
306}