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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
e443b333 | 2 | #include <linux/kernel.h> |
3c37bb68 AS |
3 | #include <linux/device.h> |
4 | #include <linux/types.h> | |
5 | #include <linux/spinlock.h> | |
2d651289 AS |
6 | #include <linux/debugfs.h> |
7 | #include <linux/seq_file.h> | |
8 | #include <linux/uaccess.h> | |
e443b333 AS |
9 | #include <linux/usb/ch9.h> |
10 | #include <linux/usb/gadget.h> | |
88bdffc8 LJ |
11 | #include <linux/usb/phy.h> |
12 | #include <linux/usb/otg.h> | |
13 | #include <linux/usb/otg-fsm.h> | |
b0930d4c | 14 | #include <linux/usb/chipidea.h> |
e443b333 AS |
15 | |
16 | #include "ci.h" | |
17 | #include "udc.h" | |
18 | #include "bits.h" | |
c4a8b639 | 19 | #include "otg.h" |
e443b333 | 20 | |
e443b333 | 21 | /** |
2d651289 | 22 | * ci_device_show: prints information about device capabilities and status |
e443b333 | 23 | */ |
2d651289 | 24 | static int ci_device_show(struct seq_file *s, void *data) |
e443b333 | 25 | { |
8e22978c | 26 | struct ci_hdrc *ci = s->private; |
2d651289 | 27 | struct usb_gadget *gadget = &ci->gadget; |
e443b333 | 28 | |
2d651289 AS |
29 | seq_printf(s, "speed = %d\n", gadget->speed); |
30 | seq_printf(s, "max_speed = %d\n", gadget->max_speed); | |
31 | seq_printf(s, "is_otg = %d\n", gadget->is_otg); | |
32 | seq_printf(s, "is_a_peripheral = %d\n", gadget->is_a_peripheral); | |
33 | seq_printf(s, "b_hnp_enable = %d\n", gadget->b_hnp_enable); | |
34 | seq_printf(s, "a_hnp_support = %d\n", gadget->a_hnp_support); | |
35 | seq_printf(s, "a_alt_hnp_support = %d\n", gadget->a_alt_hnp_support); | |
36 | seq_printf(s, "name = %s\n", | |
37 | (gadget->name ? gadget->name : "")); | |
38 | ||
39 | if (!ci->driver) | |
40 | return 0; | |
e443b333 | 41 | |
2d651289 AS |
42 | seq_printf(s, "gadget function = %s\n", |
43 | (ci->driver->function ? ci->driver->function : "")); | |
44 | seq_printf(s, "gadget max speed = %d\n", ci->driver->max_speed); | |
e443b333 | 45 | |
e443b333 AS |
46 | return 0; |
47 | } | |
e8c56f27 | 48 | DEFINE_SHOW_ATTRIBUTE(ci_device); |
e443b333 | 49 | |
e443b333 | 50 | /** |
2d651289 | 51 | * ci_port_test_show: reads port test mode |
e443b333 | 52 | */ |
2d651289 | 53 | static int ci_port_test_show(struct seq_file *s, void *data) |
e443b333 | 54 | { |
8e22978c | 55 | struct ci_hdrc *ci = s->private; |
e443b333 AS |
56 | unsigned long flags; |
57 | unsigned mode; | |
58 | ||
bc249379 | 59 | pm_runtime_get_sync(ci->dev); |
26c696c6 RZ |
60 | spin_lock_irqsave(&ci->lock, flags); |
61 | mode = hw_port_test_get(ci); | |
62 | spin_unlock_irqrestore(&ci->lock, flags); | |
bc249379 | 63 | pm_runtime_put_sync(ci->dev); |
e443b333 | 64 | |
2d651289 AS |
65 | seq_printf(s, "mode = %u\n", mode); |
66 | ||
67 | return 0; | |
e443b333 AS |
68 | } |
69 | ||
70 | /** | |
2d651289 | 71 | * ci_port_test_write: writes port test mode |
e443b333 | 72 | */ |
2d651289 AS |
73 | static ssize_t ci_port_test_write(struct file *file, const char __user *ubuf, |
74 | size_t count, loff_t *ppos) | |
e443b333 | 75 | { |
2d651289 | 76 | struct seq_file *s = file->private_data; |
8e22978c | 77 | struct ci_hdrc *ci = s->private; |
e443b333 AS |
78 | unsigned long flags; |
79 | unsigned mode; | |
2d651289 AS |
80 | char buf[32]; |
81 | int ret; | |
e443b333 | 82 | |
bd5fb0ae HS |
83 | count = min_t(size_t, sizeof(buf) - 1, count); |
84 | if (copy_from_user(buf, ubuf, count)) | |
2d651289 | 85 | return -EFAULT; |
e443b333 | 86 | |
bd5fb0ae HS |
87 | /* sscanf requires a zero terminated string */ |
88 | buf[count] = '\0'; | |
89 | ||
2d651289 AS |
90 | if (sscanf(buf, "%u", &mode) != 1) |
91 | return -EINVAL; | |
e443b333 | 92 | |
3c724888 A |
93 | if (mode > 255) |
94 | return -EBADRQC; | |
95 | ||
bc249379 | 96 | pm_runtime_get_sync(ci->dev); |
26c696c6 | 97 | spin_lock_irqsave(&ci->lock, flags); |
2d651289 | 98 | ret = hw_port_test_set(ci, mode); |
26c696c6 | 99 | spin_unlock_irqrestore(&ci->lock, flags); |
bc249379 | 100 | pm_runtime_put_sync(ci->dev); |
e443b333 | 101 | |
2d651289 | 102 | return ret ? ret : count; |
e443b333 | 103 | } |
2d651289 AS |
104 | |
105 | static int ci_port_test_open(struct inode *inode, struct file *file) | |
106 | { | |
107 | return single_open(file, ci_port_test_show, inode->i_private); | |
108 | } | |
109 | ||
110 | static const struct file_operations ci_port_test_fops = { | |
111 | .open = ci_port_test_open, | |
112 | .write = ci_port_test_write, | |
113 | .read = seq_read, | |
114 | .llseek = seq_lseek, | |
115 | .release = single_release, | |
116 | }; | |
e443b333 AS |
117 | |
118 | /** | |
2d651289 | 119 | * ci_qheads_show: DMA contents of all queue heads |
e443b333 | 120 | */ |
2d651289 | 121 | static int ci_qheads_show(struct seq_file *s, void *data) |
e443b333 | 122 | { |
8e22978c | 123 | struct ci_hdrc *ci = s->private; |
e443b333 | 124 | unsigned long flags; |
2d651289 | 125 | unsigned i, j; |
e443b333 | 126 | |
2d651289 AS |
127 | if (ci->role != CI_ROLE_GADGET) { |
128 | seq_printf(s, "not in gadget mode\n"); | |
e443b333 AS |
129 | return 0; |
130 | } | |
131 | ||
26c696c6 RZ |
132 | spin_lock_irqsave(&ci->lock, flags); |
133 | for (i = 0; i < ci->hw_ep_max/2; i++) { | |
8e22978c AS |
134 | struct ci_hw_ep *hweprx = &ci->ci_hw_ep[i]; |
135 | struct ci_hw_ep *hweptx = | |
136 | &ci->ci_hw_ep[i + ci->hw_ep_max/2]; | |
2d651289 | 137 | seq_printf(s, "EP=%02i: RX=%08X TX=%08X\n", |
2dbc5c4c | 138 | i, (u32)hweprx->qh.dma, (u32)hweptx->qh.dma); |
8e22978c | 139 | for (j = 0; j < (sizeof(struct ci_hw_qh)/sizeof(u32)); j++) |
2d651289 | 140 | seq_printf(s, " %04X: %08X %08X\n", j, |
2dbc5c4c AS |
141 | *((u32 *)hweprx->qh.ptr + j), |
142 | *((u32 *)hweptx->qh.ptr + j)); | |
e443b333 | 143 | } |
26c696c6 | 144 | spin_unlock_irqrestore(&ci->lock, flags); |
e443b333 | 145 | |
2d651289 | 146 | return 0; |
e443b333 | 147 | } |
e8c56f27 | 148 | DEFINE_SHOW_ATTRIBUTE(ci_qheads); |
e443b333 AS |
149 | |
150 | /** | |
2d651289 | 151 | * ci_requests_show: DMA contents of all requests currently queued (all endpts) |
e443b333 | 152 | */ |
2d651289 | 153 | static int ci_requests_show(struct seq_file *s, void *data) |
e443b333 | 154 | { |
8e22978c | 155 | struct ci_hdrc *ci = s->private; |
e443b333 | 156 | unsigned long flags; |
8e22978c | 157 | struct ci_hw_req *req = NULL; |
cc9e6c49 | 158 | struct td_node *node, *tmpnode; |
8e22978c | 159 | unsigned i, j, qsize = sizeof(struct ci_hw_td)/sizeof(u32); |
e443b333 | 160 | |
2d651289 AS |
161 | if (ci->role != CI_ROLE_GADGET) { |
162 | seq_printf(s, "not in gadget mode\n"); | |
e443b333 AS |
163 | return 0; |
164 | } | |
165 | ||
26c696c6 RZ |
166 | spin_lock_irqsave(&ci->lock, flags); |
167 | for (i = 0; i < ci->hw_ep_max; i++) | |
32540ba2 | 168 | list_for_each_entry(req, &ci->ci_hw_ep[i].qh.queue, queue) { |
cc9e6c49 MG |
169 | list_for_each_entry_safe(node, tmpnode, &req->tds, td) { |
170 | seq_printf(s, "EP=%02i: TD=%08X %s\n", | |
171 | i % (ci->hw_ep_max / 2), | |
172 | (u32)node->dma, | |
173 | ((i < ci->hw_ep_max/2) ? | |
174 | "RX" : "TX")); | |
175 | ||
176 | for (j = 0; j < qsize; j++) | |
177 | seq_printf(s, " %04X: %08X\n", j, | |
178 | *((u32 *)node->ptr + j)); | |
179 | } | |
e443b333 | 180 | } |
26c696c6 | 181 | spin_unlock_irqrestore(&ci->lock, flags); |
e443b333 | 182 | |
2d651289 AS |
183 | return 0; |
184 | } | |
e8c56f27 | 185 | DEFINE_SHOW_ATTRIBUTE(ci_requests); |
e443b333 | 186 | |
df40f8d3 | 187 | static int ci_otg_show(struct seq_file *s, void *unused) |
88bdffc8 LJ |
188 | { |
189 | struct ci_hdrc *ci = s->private; | |
190 | struct otg_fsm *fsm; | |
191 | ||
192 | if (!ci || !ci_otg_is_fsm_mode(ci)) | |
193 | return 0; | |
194 | ||
195 | fsm = &ci->fsm; | |
196 | ||
197 | /* ------ State ----- */ | |
198 | seq_printf(s, "OTG state: %s\n\n", | |
ef44cb42 | 199 | usb_otg_state_string(ci->otg.state)); |
88bdffc8 LJ |
200 | |
201 | /* ------ State Machine Variables ----- */ | |
202 | seq_printf(s, "a_bus_drop: %d\n", fsm->a_bus_drop); | |
203 | ||
204 | seq_printf(s, "a_bus_req: %d\n", fsm->a_bus_req); | |
205 | ||
206 | seq_printf(s, "a_srp_det: %d\n", fsm->a_srp_det); | |
207 | ||
208 | seq_printf(s, "a_vbus_vld: %d\n", fsm->a_vbus_vld); | |
209 | ||
210 | seq_printf(s, "b_conn: %d\n", fsm->b_conn); | |
211 | ||
212 | seq_printf(s, "adp_change: %d\n", fsm->adp_change); | |
213 | ||
214 | seq_printf(s, "power_up: %d\n", fsm->power_up); | |
215 | ||
216 | seq_printf(s, "a_bus_resume: %d\n", fsm->a_bus_resume); | |
217 | ||
218 | seq_printf(s, "a_bus_suspend: %d\n", fsm->a_bus_suspend); | |
219 | ||
220 | seq_printf(s, "a_conn: %d\n", fsm->a_conn); | |
221 | ||
222 | seq_printf(s, "b_bus_req: %d\n", fsm->b_bus_req); | |
223 | ||
224 | seq_printf(s, "b_bus_suspend: %d\n", fsm->b_bus_suspend); | |
225 | ||
226 | seq_printf(s, "b_se0_srp: %d\n", fsm->b_se0_srp); | |
227 | ||
228 | seq_printf(s, "b_ssend_srp: %d\n", fsm->b_ssend_srp); | |
229 | ||
230 | seq_printf(s, "b_sess_vld: %d\n", fsm->b_sess_vld); | |
231 | ||
232 | seq_printf(s, "b_srp_done: %d\n", fsm->b_srp_done); | |
233 | ||
234 | seq_printf(s, "drv_vbus: %d\n", fsm->drv_vbus); | |
235 | ||
236 | seq_printf(s, "loc_conn: %d\n", fsm->loc_conn); | |
237 | ||
238 | seq_printf(s, "loc_sof: %d\n", fsm->loc_sof); | |
239 | ||
240 | seq_printf(s, "adp_prb: %d\n", fsm->adp_prb); | |
241 | ||
242 | seq_printf(s, "id: %d\n", fsm->id); | |
243 | ||
244 | seq_printf(s, "protocol: %d\n", fsm->protocol); | |
245 | ||
246 | return 0; | |
247 | } | |
e8c56f27 | 248 | DEFINE_SHOW_ATTRIBUTE(ci_otg); |
88bdffc8 | 249 | |
c8e333a3 AS |
250 | static int ci_role_show(struct seq_file *s, void *data) |
251 | { | |
8e22978c | 252 | struct ci_hdrc *ci = s->private; |
c8e333a3 | 253 | |
0340ff83 MT |
254 | if (ci->role != CI_ROLE_END) |
255 | seq_printf(s, "%s\n", ci_role(ci)->name); | |
c8e333a3 AS |
256 | |
257 | return 0; | |
258 | } | |
259 | ||
260 | static ssize_t ci_role_write(struct file *file, const char __user *ubuf, | |
261 | size_t count, loff_t *ppos) | |
262 | { | |
263 | struct seq_file *s = file->private_data; | |
8e22978c | 264 | struct ci_hdrc *ci = s->private; |
c8e333a3 AS |
265 | enum ci_role role; |
266 | char buf[8]; | |
267 | int ret; | |
268 | ||
269 | if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) | |
270 | return -EFAULT; | |
271 | ||
272 | for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++) | |
273 | if (ci->roles[role] && | |
274 | !strncmp(buf, ci->roles[role]->name, | |
275 | strlen(ci->roles[role]->name))) | |
276 | break; | |
277 | ||
278 | if (role == CI_ROLE_END || role == ci->role) | |
279 | return -EINVAL; | |
280 | ||
bc249379 | 281 | pm_runtime_get_sync(ci->dev); |
251b3c8b | 282 | disable_irq(ci->irq); |
c8e333a3 AS |
283 | ci_role_stop(ci); |
284 | ret = ci_role_start(ci, role); | |
251b3c8b | 285 | enable_irq(ci->irq); |
bc249379 | 286 | pm_runtime_put_sync(ci->dev); |
c8e333a3 AS |
287 | |
288 | return ret ? ret : count; | |
289 | } | |
290 | ||
291 | static int ci_role_open(struct inode *inode, struct file *file) | |
292 | { | |
293 | return single_open(file, ci_role_show, inode->i_private); | |
294 | } | |
295 | ||
296 | static const struct file_operations ci_role_fops = { | |
297 | .open = ci_role_open, | |
298 | .write = ci_role_write, | |
299 | .read = seq_read, | |
300 | .llseek = seq_lseek, | |
301 | .release = single_release, | |
302 | }; | |
303 | ||
df40f8d3 | 304 | static int ci_registers_show(struct seq_file *s, void *unused) |
c4a8b639 LJ |
305 | { |
306 | struct ci_hdrc *ci = s->private; | |
307 | u32 tmp_reg; | |
308 | ||
0c4d6af4 LJ |
309 | if (!ci || ci->in_lpm) |
310 | return -EPERM; | |
c4a8b639 LJ |
311 | |
312 | /* ------ Registers ----- */ | |
313 | tmp_reg = hw_read_intr_enable(ci); | |
314 | seq_printf(s, "USBINTR reg: %08x\n", tmp_reg); | |
315 | ||
316 | tmp_reg = hw_read_intr_status(ci); | |
317 | seq_printf(s, "USBSTS reg: %08x\n", tmp_reg); | |
318 | ||
319 | tmp_reg = hw_read(ci, OP_USBMODE, ~0); | |
320 | seq_printf(s, "USBMODE reg: %08x\n", tmp_reg); | |
321 | ||
322 | tmp_reg = hw_read(ci, OP_USBCMD, ~0); | |
323 | seq_printf(s, "USBCMD reg: %08x\n", tmp_reg); | |
324 | ||
325 | tmp_reg = hw_read(ci, OP_PORTSC, ~0); | |
326 | seq_printf(s, "PORTSC reg: %08x\n", tmp_reg); | |
327 | ||
328 | if (ci->is_otg) { | |
329 | tmp_reg = hw_read_otgsc(ci, ~0); | |
330 | seq_printf(s, "OTGSC reg: %08x\n", tmp_reg); | |
331 | } | |
332 | ||
333 | return 0; | |
334 | } | |
e8c56f27 | 335 | DEFINE_SHOW_ATTRIBUTE(ci_registers); |
c4a8b639 | 336 | |
e443b333 AS |
337 | /** |
338 | * dbg_create_files: initializes the attribute interface | |
2d651289 | 339 | * @ci: device |
e443b333 AS |
340 | * |
341 | * This function returns an error code | |
342 | */ | |
a61b75d1 | 343 | void dbg_create_files(struct ci_hdrc *ci) |
e443b333 | 344 | { |
2d651289 | 345 | ci->debugfs = debugfs_create_dir(dev_name(ci->dev), NULL); |
2d651289 | 346 | |
a61b75d1 GKH |
347 | debugfs_create_file("device", S_IRUGO, ci->debugfs, ci, |
348 | &ci_device_fops); | |
349 | debugfs_create_file("port_test", S_IRUGO | S_IWUSR, ci->debugfs, ci, | |
350 | &ci_port_test_fops); | |
351 | debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci, | |
352 | &ci_qheads_fops); | |
353 | debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci, | |
354 | &ci_requests_fops); | |
c8e333a3 | 355 | |
88bdffc8 | 356 | if (ci_otg_is_fsm_mode(ci)) { |
a61b75d1 GKH |
357 | debugfs_create_file("otg", S_IRUGO, ci->debugfs, ci, |
358 | &ci_otg_fops); | |
88bdffc8 LJ |
359 | } |
360 | ||
a61b75d1 GKH |
361 | debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci, |
362 | &ci_role_fops); | |
363 | debugfs_create_file("registers", S_IRUGO, ci->debugfs, ci, | |
364 | &ci_registers_fops); | |
e443b333 AS |
365 | } |
366 | ||
367 | /** | |
368 | * dbg_remove_files: destroys the attribute interface | |
2d651289 | 369 | * @ci: device |
e443b333 | 370 | */ |
8e22978c | 371 | void dbg_remove_files(struct ci_hdrc *ci) |
e443b333 | 372 | { |
2d651289 | 373 | debugfs_remove_recursive(ci->debugfs); |
e443b333 | 374 | } |