blob: a4f7db2e18ddc295fc4ff1a0cad99bc1ff8b04bd [file] [log] [blame]
Alexander Shishkine443b332012-05-11 17:25:46 +03001#include <linux/kernel.h>
Alexander Shishkin3c37bb62013-03-30 02:46:17 +02002#include <linux/device.h>
3#include <linux/types.h>
4#include <linux/spinlock.h>
Alexander Shishkin2d651282013-03-30 12:53:51 +02005#include <linux/debugfs.h>
6#include <linux/seq_file.h>
7#include <linux/uaccess.h>
Alexander Shishkine443b332012-05-11 17:25:46 +03008#include <linux/usb/ch9.h>
9#include <linux/usb/gadget.h>
Li Jun88bdffc2014-04-23 15:56:52 +080010#include <linux/usb/phy.h>
11#include <linux/usb/otg.h>
12#include <linux/usb/otg-fsm.h>
Li Junb0930d4c2015-07-09 15:18:46 +080013#include <linux/usb/chipidea.h>
Alexander Shishkine443b332012-05-11 17:25:46 +030014
15#include "ci.h"
16#include "udc.h"
17#include "bits.h"
Li Junc4a8b632014-04-23 15:56:40 +080018#include "otg.h"
Alexander Shishkine443b332012-05-11 17:25:46 +030019
Alexander Shishkine443b332012-05-11 17:25:46 +030020/**
Alexander Shishkin2d651282013-03-30 12:53:51 +020021 * ci_device_show: prints information about device capabilities and status
Alexander Shishkine443b332012-05-11 17:25:46 +030022 */
Alexander Shishkin2d651282013-03-30 12:53:51 +020023static int ci_device_show(struct seq_file *s, void *data)
Alexander Shishkine443b332012-05-11 17:25:46 +030024{
Alexander Shishkin8e229782013-06-24 14:46:36 +030025 struct ci_hdrc *ci = s->private;
Richard Zhao26c696c2012-07-07 22:56:40 +080026 struct usb_gadget *gadget = &ci->gadget;
Alexander Shishkine443b332012-05-11 17:25:46 +030027
Alexander Shishkin2d651282013-03-30 12:53:51 +020028 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)
Alexander Shishkine443b332012-05-11 17:25:46 +030039 return 0;
Alexander Shishkine443b332012-05-11 17:25:46 +030040
Alexander Shishkin2d651282013-03-30 12:53:51 +020041 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);
Alexander Shishkine443b332012-05-11 17:25:46 +030044
Alexander Shishkin2d651282013-03-30 12:53:51 +020045 return 0;
Alexander Shishkine443b332012-05-11 17:25:46 +030046}
Alexander Shishkin2d651282013-03-30 12:53:51 +020047
48static int ci_device_open(struct inode *inode, struct file *file)
49{
50 return single_open(file, ci_device_show, inode->i_private);
51}
52
53static 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};
Alexander Shishkine443b332012-05-11 17:25:46 +030059
60/**
Alexander Shishkin2d651282013-03-30 12:53:51 +020061 * ci_port_test_show: reads port test mode
Alexander Shishkine443b332012-05-11 17:25:46 +030062 */
Alexander Shishkin2d651282013-03-30 12:53:51 +020063static int ci_port_test_show(struct seq_file *s, void *data)
Alexander Shishkine443b332012-05-11 17:25:46 +030064{
Alexander Shishkin8e229782013-06-24 14:46:36 +030065 struct ci_hdrc *ci = s->private;
Alexander Shishkine443b332012-05-11 17:25:46 +030066 unsigned long flags;
67 unsigned mode;
68
Li Junbc249372015-07-29 13:11:11 +080069 pm_runtime_get_sync(ci->dev);
Richard Zhao26c696c2012-07-07 22:56:40 +080070 spin_lock_irqsave(&ci->lock, flags);
71 mode = hw_port_test_get(ci);
72 spin_unlock_irqrestore(&ci->lock, flags);
Li Junbc249372015-07-29 13:11:11 +080073 pm_runtime_put_sync(ci->dev);
Alexander Shishkine443b332012-05-11 17:25:46 +030074
Alexander Shishkin2d651282013-03-30 12:53:51 +020075 seq_printf(s, "mode = %u\n", mode);
76
77 return 0;
Alexander Shishkine443b332012-05-11 17:25:46 +030078}
79
80/**
Alexander Shishkin2d651282013-03-30 12:53:51 +020081 * ci_port_test_write: writes port test mode
Alexander Shishkine443b332012-05-11 17:25:46 +030082 */
Alexander Shishkin2d651282013-03-30 12:53:51 +020083static ssize_t ci_port_test_write(struct file *file, const char __user *ubuf,
84 size_t count, loff_t *ppos)
Alexander Shishkine443b332012-05-11 17:25:46 +030085{
Alexander Shishkin2d651282013-03-30 12:53:51 +020086 struct seq_file *s = file->private_data;
Alexander Shishkin8e229782013-06-24 14:46:36 +030087 struct ci_hdrc *ci = s->private;
Alexander Shishkine443b332012-05-11 17:25:46 +030088 unsigned long flags;
89 unsigned mode;
Alexander Shishkin2d651282013-03-30 12:53:51 +020090 char buf[32];
91 int ret;
Alexander Shishkine443b332012-05-11 17:25:46 +030092
Heinrich Schuchardtbd5fb0a2015-04-28 19:30:47 +020093 count = min_t(size_t, sizeof(buf) - 1, count);
94 if (copy_from_user(buf, ubuf, count))
Alexander Shishkin2d651282013-03-30 12:53:51 +020095 return -EFAULT;
Alexander Shishkine443b332012-05-11 17:25:46 +030096
Heinrich Schuchardtbd5fb0a2015-04-28 19:30:47 +020097 /* sscanf requires a zero terminated string */
98 buf[count] = '\0';
99
Alexander Shishkin2d651282013-03-30 12:53:51 +0200100 if (sscanf(buf, "%u", &mode) != 1)
101 return -EINVAL;
Alexander Shishkine443b332012-05-11 17:25:46 +0300102
Li Junbc249372015-07-29 13:11:11 +0800103 pm_runtime_get_sync(ci->dev);
Richard Zhao26c696c2012-07-07 22:56:40 +0800104 spin_lock_irqsave(&ci->lock, flags);
Alexander Shishkin2d651282013-03-30 12:53:51 +0200105 ret = hw_port_test_set(ci, mode);
Richard Zhao26c696c2012-07-07 22:56:40 +0800106 spin_unlock_irqrestore(&ci->lock, flags);
Li Junbc249372015-07-29 13:11:11 +0800107 pm_runtime_put_sync(ci->dev);
Alexander Shishkine443b332012-05-11 17:25:46 +0300108
Alexander Shishkin2d651282013-03-30 12:53:51 +0200109 return ret ? ret : count;
Alexander Shishkine443b332012-05-11 17:25:46 +0300110}
Alexander Shishkin2d651282013-03-30 12:53:51 +0200111
112static int ci_port_test_open(struct inode *inode, struct file *file)
113{
114 return single_open(file, ci_port_test_show, inode->i_private);
115}
116
117static const struct file_operations ci_port_test_fops = {
118 .open = ci_port_test_open,
119 .write = ci_port_test_write,
120 .read = seq_read,
121 .llseek = seq_lseek,
122 .release = single_release,
123};
Alexander Shishkine443b332012-05-11 17:25:46 +0300124
125/**
Alexander Shishkin2d651282013-03-30 12:53:51 +0200126 * ci_qheads_show: DMA contents of all queue heads
Alexander Shishkine443b332012-05-11 17:25:46 +0300127 */
Alexander Shishkin2d651282013-03-30 12:53:51 +0200128static int ci_qheads_show(struct seq_file *s, void *data)
Alexander Shishkine443b332012-05-11 17:25:46 +0300129{
Alexander Shishkin8e229782013-06-24 14:46:36 +0300130 struct ci_hdrc *ci = s->private;
Alexander Shishkine443b332012-05-11 17:25:46 +0300131 unsigned long flags;
Alexander Shishkin2d651282013-03-30 12:53:51 +0200132 unsigned i, j;
Alexander Shishkine443b332012-05-11 17:25:46 +0300133
Alexander Shishkin2d651282013-03-30 12:53:51 +0200134 if (ci->role != CI_ROLE_GADGET) {
135 seq_printf(s, "not in gadget mode\n");
Alexander Shishkine443b332012-05-11 17:25:46 +0300136 return 0;
137 }
138
Richard Zhao26c696c2012-07-07 22:56:40 +0800139 spin_lock_irqsave(&ci->lock, flags);
140 for (i = 0; i < ci->hw_ep_max/2; i++) {
Alexander Shishkin8e229782013-06-24 14:46:36 +0300141 struct ci_hw_ep *hweprx = &ci->ci_hw_ep[i];
142 struct ci_hw_ep *hweptx =
143 &ci->ci_hw_ep[i + ci->hw_ep_max/2];
Alexander Shishkin2d651282013-03-30 12:53:51 +0200144 seq_printf(s, "EP=%02i: RX=%08X TX=%08X\n",
Alexander Shishkin2dbc5c42013-06-13 18:00:03 +0300145 i, (u32)hweprx->qh.dma, (u32)hweptx->qh.dma);
Alexander Shishkin8e229782013-06-24 14:46:36 +0300146 for (j = 0; j < (sizeof(struct ci_hw_qh)/sizeof(u32)); j++)
Alexander Shishkin2d651282013-03-30 12:53:51 +0200147 seq_printf(s, " %04X: %08X %08X\n", j,
Alexander Shishkin2dbc5c42013-06-13 18:00:03 +0300148 *((u32 *)hweprx->qh.ptr + j),
149 *((u32 *)hweptx->qh.ptr + j));
Alexander Shishkine443b332012-05-11 17:25:46 +0300150 }
Richard Zhao26c696c2012-07-07 22:56:40 +0800151 spin_unlock_irqrestore(&ci->lock, flags);
Alexander Shishkine443b332012-05-11 17:25:46 +0300152
Alexander Shishkin2d651282013-03-30 12:53:51 +0200153 return 0;
Alexander Shishkine443b332012-05-11 17:25:46 +0300154}
155
Alexander Shishkin2d651282013-03-30 12:53:51 +0200156static int ci_qheads_open(struct inode *inode, struct file *file)
Alexander Shishkine443b332012-05-11 17:25:46 +0300157{
Alexander Shishkin2d651282013-03-30 12:53:51 +0200158 return single_open(file, ci_qheads_show, inode->i_private);
Alexander Shishkine443b332012-05-11 17:25:46 +0300159}
Alexander Shishkin2d651282013-03-30 12:53:51 +0200160
161static const struct file_operations ci_qheads_fops = {
162 .open = ci_qheads_open,
163 .read = seq_read,
164 .llseek = seq_lseek,
165 .release = single_release,
166};
Alexander Shishkine443b332012-05-11 17:25:46 +0300167
168/**
Alexander Shishkin2d651282013-03-30 12:53:51 +0200169 * ci_requests_show: DMA contents of all requests currently queued (all endpts)
Alexander Shishkine443b332012-05-11 17:25:46 +0300170 */
Alexander Shishkin2d651282013-03-30 12:53:51 +0200171static int ci_requests_show(struct seq_file *s, void *data)
Alexander Shishkine443b332012-05-11 17:25:46 +0300172{
Alexander Shishkin8e229782013-06-24 14:46:36 +0300173 struct ci_hdrc *ci = s->private;
Alexander Shishkine443b332012-05-11 17:25:46 +0300174 unsigned long flags;
175 struct list_head *ptr = NULL;
Alexander Shishkin8e229782013-06-24 14:46:36 +0300176 struct ci_hw_req *req = NULL;
Michael Grzeschikcc9e6c42013-06-13 17:59:53 +0300177 struct td_node *node, *tmpnode;
Alexander Shishkin8e229782013-06-24 14:46:36 +0300178 unsigned i, j, qsize = sizeof(struct ci_hw_td)/sizeof(u32);
Alexander Shishkine443b332012-05-11 17:25:46 +0300179
Alexander Shishkin2d651282013-03-30 12:53:51 +0200180 if (ci->role != CI_ROLE_GADGET) {
181 seq_printf(s, "not in gadget mode\n");
Alexander Shishkine443b332012-05-11 17:25:46 +0300182 return 0;
183 }
184
Richard Zhao26c696c2012-07-07 22:56:40 +0800185 spin_lock_irqsave(&ci->lock, flags);
186 for (i = 0; i < ci->hw_ep_max; i++)
Alexander Shishkin8e229782013-06-24 14:46:36 +0300187 list_for_each(ptr, &ci->ci_hw_ep[i].qh.queue) {
188 req = list_entry(ptr, struct ci_hw_req, queue);
Alexander Shishkine443b332012-05-11 17:25:46 +0300189
Michael Grzeschikcc9e6c42013-06-13 17:59:53 +0300190 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),
193 (u32)node->dma,
194 ((i < ci->hw_ep_max/2) ?
195 "RX" : "TX"));
Alexander Shishkine443b332012-05-11 17:25:46 +0300196
Michael Grzeschikcc9e6c42013-06-13 17:59:53 +0300197 for (j = 0; j < qsize; j++)
198 seq_printf(s, " %04X: %08X\n", j,
199 *((u32 *)node->ptr + j));
200 }
Alexander Shishkine443b332012-05-11 17:25:46 +0300201 }
Richard Zhao26c696c2012-07-07 22:56:40 +0800202 spin_unlock_irqrestore(&ci->lock, flags);
Alexander Shishkine443b332012-05-11 17:25:46 +0300203
Alexander Shishkin2d651282013-03-30 12:53:51 +0200204 return 0;
Alexander Shishkine443b332012-05-11 17:25:46 +0300205}
Alexander Shishkin2d651282013-03-30 12:53:51 +0200206
207static int ci_requests_open(struct inode *inode, struct file *file)
208{
209 return single_open(file, ci_requests_show, inode->i_private);
210}
211
212static const struct file_operations ci_requests_fops = {
213 .open = ci_requests_open,
214 .read = seq_read,
215 .llseek = seq_lseek,
216 .release = single_release,
217};
Alexander Shishkine443b332012-05-11 17:25:46 +0300218
Wei Yongjundf40f8d2014-07-22 10:09:45 +0800219static int ci_otg_show(struct seq_file *s, void *unused)
Li Jun88bdffc2014-04-23 15:56:52 +0800220{
221 struct ci_hdrc *ci = s->private;
222 struct otg_fsm *fsm;
223
224 if (!ci || !ci_otg_is_fsm_mode(ci))
225 return 0;
226
227 fsm = &ci->fsm;
228
229 /* ------ State ----- */
230 seq_printf(s, "OTG state: %s\n\n",
Antoine Tenartef44cb42014-10-30 18:41:16 +0100231 usb_otg_state_string(ci->otg.state));
Li Jun88bdffc2014-04-23 15:56:52 +0800232
233 /* ------ State Machine Variables ----- */
234 seq_printf(s, "a_bus_drop: %d\n", fsm->a_bus_drop);
235
236 seq_printf(s, "a_bus_req: %d\n", fsm->a_bus_req);
237
238 seq_printf(s, "a_srp_det: %d\n", fsm->a_srp_det);
239
240 seq_printf(s, "a_vbus_vld: %d\n", fsm->a_vbus_vld);
241
242 seq_printf(s, "b_conn: %d\n", fsm->b_conn);
243
244 seq_printf(s, "adp_change: %d\n", fsm->adp_change);
245
246 seq_printf(s, "power_up: %d\n", fsm->power_up);
247
248 seq_printf(s, "a_bus_resume: %d\n", fsm->a_bus_resume);
249
250 seq_printf(s, "a_bus_suspend: %d\n", fsm->a_bus_suspend);
251
252 seq_printf(s, "a_conn: %d\n", fsm->a_conn);
253
254 seq_printf(s, "b_bus_req: %d\n", fsm->b_bus_req);
255
256 seq_printf(s, "b_bus_suspend: %d\n", fsm->b_bus_suspend);
257
258 seq_printf(s, "b_se0_srp: %d\n", fsm->b_se0_srp);
259
260 seq_printf(s, "b_ssend_srp: %d\n", fsm->b_ssend_srp);
261
262 seq_printf(s, "b_sess_vld: %d\n", fsm->b_sess_vld);
263
264 seq_printf(s, "b_srp_done: %d\n", fsm->b_srp_done);
265
266 seq_printf(s, "drv_vbus: %d\n", fsm->drv_vbus);
267
268 seq_printf(s, "loc_conn: %d\n", fsm->loc_conn);
269
270 seq_printf(s, "loc_sof: %d\n", fsm->loc_sof);
271
272 seq_printf(s, "adp_prb: %d\n", fsm->adp_prb);
273
274 seq_printf(s, "id: %d\n", fsm->id);
275
276 seq_printf(s, "protocol: %d\n", fsm->protocol);
277
278 return 0;
279}
280
281static int ci_otg_open(struct inode *inode, struct file *file)
282{
283 return single_open(file, ci_otg_show, inode->i_private);
284}
285
286static const struct file_operations ci_otg_fops = {
287 .open = ci_otg_open,
288 .read = seq_read,
289 .llseek = seq_lseek,
290 .release = single_release,
291};
292
Alexander Shishkinc8e333a2013-03-30 12:53:52 +0200293static int ci_role_show(struct seq_file *s, void *data)
294{
Alexander Shishkin8e229782013-06-24 14:46:36 +0300295 struct ci_hdrc *ci = s->private;
Alexander Shishkinc8e333a2013-03-30 12:53:52 +0200296
297 seq_printf(s, "%s\n", ci_role(ci)->name);
298
299 return 0;
300}
301
302static ssize_t ci_role_write(struct file *file, const char __user *ubuf,
303 size_t count, loff_t *ppos)
304{
305 struct seq_file *s = file->private_data;
Alexander Shishkin8e229782013-06-24 14:46:36 +0300306 struct ci_hdrc *ci = s->private;
Alexander Shishkinc8e333a2013-03-30 12:53:52 +0200307 enum ci_role role;
308 char buf[8];
309 int ret;
310
311 if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
312 return -EFAULT;
313
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)))
318 break;
319
320 if (role == CI_ROLE_END || role == ci->role)
321 return -EINVAL;
322
Li Junbc249372015-07-29 13:11:11 +0800323 pm_runtime_get_sync(ci->dev);
Li Jun251b3c82015-10-13 18:23:31 +0800324 disable_irq(ci->irq);
Alexander Shishkinc8e333a2013-03-30 12:53:52 +0200325 ci_role_stop(ci);
326 ret = ci_role_start(ci, role);
Li Jun251b3c82015-10-13 18:23:31 +0800327 enable_irq(ci->irq);
Li Junbc249372015-07-29 13:11:11 +0800328 pm_runtime_put_sync(ci->dev);
Alexander Shishkinc8e333a2013-03-30 12:53:52 +0200329
330 return ret ? ret : count;
331}
332
333static int ci_role_open(struct inode *inode, struct file *file)
334{
335 return single_open(file, ci_role_show, inode->i_private);
336}
337
338static const struct file_operations ci_role_fops = {
339 .open = ci_role_open,
340 .write = ci_role_write,
341 .read = seq_read,
342 .llseek = seq_lseek,
343 .release = single_release,
344};
345
Wei Yongjundf40f8d2014-07-22 10:09:45 +0800346static int ci_registers_show(struct seq_file *s, void *unused)
Li Junc4a8b632014-04-23 15:56:40 +0800347{
348 struct ci_hdrc *ci = s->private;
349 u32 tmp_reg;
350
Li Jun0c4d6af2015-03-27 19:43:01 +0800351 if (!ci || ci->in_lpm)
352 return -EPERM;
Li Junc4a8b632014-04-23 15:56:40 +0800353
354 /* ------ Registers ----- */
355 tmp_reg = hw_read_intr_enable(ci);
356 seq_printf(s, "USBINTR reg: %08x\n", tmp_reg);
357
358 tmp_reg = hw_read_intr_status(ci);
359 seq_printf(s, "USBSTS reg: %08x\n", tmp_reg);
360
361 tmp_reg = hw_read(ci, OP_USBMODE, ~0);
362 seq_printf(s, "USBMODE reg: %08x\n", tmp_reg);
363
364 tmp_reg = hw_read(ci, OP_USBCMD, ~0);
365 seq_printf(s, "USBCMD reg: %08x\n", tmp_reg);
366
367 tmp_reg = hw_read(ci, OP_PORTSC, ~0);
368 seq_printf(s, "PORTSC reg: %08x\n", tmp_reg);
369
370 if (ci->is_otg) {
371 tmp_reg = hw_read_otgsc(ci, ~0);
372 seq_printf(s, "OTGSC reg: %08x\n", tmp_reg);
373 }
374
375 return 0;
376}
377
378static int ci_registers_open(struct inode *inode, struct file *file)
379{
380 return single_open(file, ci_registers_show, inode->i_private);
381}
382
383static const struct file_operations ci_registers_fops = {
384 .open = ci_registers_open,
385 .read = seq_read,
386 .llseek = seq_lseek,
387 .release = single_release,
388};
389
Alexander Shishkine443b332012-05-11 17:25:46 +0300390/**
391 * dbg_create_files: initializes the attribute interface
Alexander Shishkin2d651282013-03-30 12:53:51 +0200392 * @ci: device
Alexander Shishkine443b332012-05-11 17:25:46 +0300393 *
394 * This function returns an error code
395 */
Alexander Shishkin8e229782013-06-24 14:46:36 +0300396int dbg_create_files(struct ci_hdrc *ci)
Alexander Shishkine443b332012-05-11 17:25:46 +0300397{
Alexander Shishkin2d651282013-03-30 12:53:51 +0200398 struct dentry *dent;
Alexander Shishkine443b332012-05-11 17:25:46 +0300399
Alexander Shishkin2d651282013-03-30 12:53:51 +0200400 ci->debugfs = debugfs_create_dir(dev_name(ci->dev), NULL);
401 if (!ci->debugfs)
402 return -ENOMEM;
Alexander Shishkine443b332012-05-11 17:25:46 +0300403
Alexander Shishkin2d651282013-03-30 12:53:51 +0200404 dent = debugfs_create_file("device", S_IRUGO, ci->debugfs, ci,
405 &ci_device_fops);
406 if (!dent)
407 goto err;
408
409 dent = debugfs_create_file("port_test", S_IRUGO | S_IWUSR, ci->debugfs,
410 ci, &ci_port_test_fops);
411 if (!dent)
412 goto err;
413
414 dent = debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci,
415 &ci_qheads_fops);
416 if (!dent)
417 goto err;
418
419 dent = debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci,
420 &ci_requests_fops);
Alexander Shishkinc8e333a2013-03-30 12:53:52 +0200421 if (!dent)
422 goto err;
423
Li Jun88bdffc2014-04-23 15:56:52 +0800424 if (ci_otg_is_fsm_mode(ci)) {
425 dent = debugfs_create_file("otg", S_IRUGO, ci->debugfs, ci,
426 &ci_otg_fops);
427 if (!dent)
428 goto err;
429 }
430
Alexander Shishkinc8e333a2013-03-30 12:53:52 +0200431 dent = debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci,
432 &ci_role_fops);
Li Junc4a8b632014-04-23 15:56:40 +0800433 if (!dent)
434 goto err;
435
436 dent = debugfs_create_file("registers", S_IRUGO, ci->debugfs, ci,
437 &ci_registers_fops);
438
Alexander Shishkin2d651282013-03-30 12:53:51 +0200439 if (dent)
440 return 0;
441err:
442 debugfs_remove_recursive(ci->debugfs);
443 return -ENOMEM;
Alexander Shishkine443b332012-05-11 17:25:46 +0300444}
445
446/**
447 * dbg_remove_files: destroys the attribute interface
Alexander Shishkin2d651282013-03-30 12:53:51 +0200448 * @ci: device
Alexander Shishkine443b332012-05-11 17:25:46 +0300449 */
Alexander Shishkin8e229782013-06-24 14:46:36 +0300450void dbg_remove_files(struct ci_hdrc *ci)
Alexander Shishkine443b332012-05-11 17:25:46 +0300451{
Alexander Shishkin2d651282013-03-30 12:53:51 +0200452 debugfs_remove_recursive(ci->debugfs);
Alexander Shishkine443b332012-05-11 17:25:46 +0300453}