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Commit | Line | Data |
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23faf2bc | 1 | /* |
23faf2bc MV |
2 | * Most of this source has been derived from the Linux USB |
3 | * project: | |
4 | * (C) Copyright Linus Torvalds 1999 | |
5 | * (C) Copyright Johannes Erdfelt 1999-2001 | |
6 | * (C) Copyright Andreas Gal 1999 | |
7 | * (C) Copyright Gregory P. Smith 1999 | |
8 | * (C) Copyright Deti Fliegl 1999 (new USB architecture) | |
9 | * (C) Copyright Randy Dunlap 2000 | |
10 | * (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id) | |
11 | * (C) Copyright Yggdrasil Computing, Inc. 2000 | |
12 | * (usb_device_id matching changes by Adam J. Richter) | |
13 | * | |
14 | * Adapted for U-Boot: | |
15 | * (C) Copyright 2001 Denis Peter, MPL AG Switzerland | |
16 | * | |
1a459660 | 17 | * SPDX-License-Identifier: GPL-2.0+ |
23faf2bc MV |
18 | */ |
19 | ||
20 | /**************************************************************************** | |
21 | * HUB "Driver" | |
22 | * Probes device for being a hub and configurate it | |
23 | */ | |
24 | ||
25 | #include <common.h> | |
26 | #include <command.h> | |
054fe48e | 27 | #include <dm.h> |
79b58887 | 28 | #include <errno.h> |
cf92e05c | 29 | #include <memalign.h> |
23faf2bc | 30 | #include <asm/processor.h> |
93ad908c | 31 | #include <asm/unaligned.h> |
23faf2bc | 32 | #include <linux/ctype.h> |
c998da0d | 33 | #include <linux/list.h> |
23faf2bc | 34 | #include <asm/byteorder.h> |
3884c98c SG |
35 | #ifdef CONFIG_SANDBOX |
36 | #include <asm/state.h> | |
37 | #endif | |
23faf2bc | 38 | #include <asm/unaligned.h> |
054fe48e SG |
39 | |
40 | DECLARE_GLOBAL_DATA_PTR; | |
23faf2bc MV |
41 | |
42 | #include <usb.h> | |
23faf2bc | 43 | |
23faf2bc MV |
44 | #define USB_BUFSIZ 512 |
45 | ||
f7f60100 SR |
46 | #define HUB_SHORT_RESET_TIME 20 |
47 | #define HUB_LONG_RESET_TIME 200 | |
48 | ||
c998da0d SR |
49 | #define PORT_OVERCURRENT_MAX_SCAN_COUNT 3 |
50 | ||
51 | struct usb_device_scan { | |
52 | struct usb_device *dev; /* USB hub device to scan */ | |
53 | struct usb_hub_device *hub; /* USB hub struct */ | |
54 | int port; /* USB port to scan */ | |
55 | struct list_head list; | |
56 | }; | |
57 | ||
054fe48e | 58 | /* TODO(sjg@chromium.org): Remove this when CONFIG_DM_USB is defined */ |
23faf2bc MV |
59 | static struct usb_hub_device hub_dev[USB_MAX_HUB]; |
60 | static int usb_hub_index; | |
c998da0d | 61 | static LIST_HEAD(usb_scan_list); |
23faf2bc | 62 | |
3615a996 DM |
63 | __weak void usb_hub_reset_devices(int port) |
64 | { | |
65 | return; | |
66 | } | |
23faf2bc MV |
67 | |
68 | static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size) | |
69 | { | |
70 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
71 | USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB, | |
72 | USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT); | |
73 | } | |
74 | ||
75 | static int usb_clear_port_feature(struct usb_device *dev, int port, int feature) | |
76 | { | |
77 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
78 | USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature, | |
79 | port, NULL, 0, USB_CNTL_TIMEOUT); | |
80 | } | |
81 | ||
82 | static int usb_set_port_feature(struct usb_device *dev, int port, int feature) | |
83 | { | |
84 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
85 | USB_REQ_SET_FEATURE, USB_RT_PORT, feature, | |
86 | port, NULL, 0, USB_CNTL_TIMEOUT); | |
87 | } | |
88 | ||
89 | static int usb_get_hub_status(struct usb_device *dev, void *data) | |
90 | { | |
91 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
92 | USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0, | |
93 | data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT); | |
94 | } | |
95 | ||
08f3bb0b | 96 | int usb_get_port_status(struct usb_device *dev, int port, void *data) |
23faf2bc MV |
97 | { |
98 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
99 | USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port, | |
100 | data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT); | |
101 | } | |
102 | ||
103 | ||
104 | static void usb_hub_power_on(struct usb_hub_device *hub) | |
105 | { | |
106 | int i; | |
107 | struct usb_device *dev; | |
a1a28c6e | 108 | unsigned pgood_delay = hub->desc.bPwrOn2PwrGood * 2; |
319418c0 | 109 | const char *env; |
23faf2bc MV |
110 | |
111 | dev = hub->pusb_dev; | |
0bf796f7 | 112 | |
ceb4972a | 113 | debug("enabling power on all ports\n"); |
0bf796f7 | 114 | for (i = 0; i < dev->maxchild; i++) { |
23faf2bc | 115 | usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER); |
ceb4972a | 116 | debug("port %d returns %lX\n", i + 1, dev->status); |
23faf2bc | 117 | } |
a1a28c6e | 118 | |
c998da0d SR |
119 | #ifdef CONFIG_SANDBOX |
120 | /* | |
121 | * Don't set timeout / delay values here. This results | |
122 | * in these values still being reset to 0. | |
123 | */ | |
124 | if (state_get_skip_delays()) | |
125 | return; | |
126 | #endif | |
127 | ||
0d437bca SW |
128 | /* |
129 | * Wait for power to become stable, | |
130 | * plus spec-defined max time for device to connect | |
319418c0 TH |
131 | * but allow this time to be increased via env variable as some |
132 | * devices break the spec and require longer warm-up times | |
0d437bca | 133 | */ |
319418c0 TH |
134 | env = getenv("usb_pgood_delay"); |
135 | if (env) | |
136 | pgood_delay = max(pgood_delay, | |
137 | (unsigned)simple_strtol(env, NULL, 0)); | |
138 | debug("pgood_delay=%dms\n", pgood_delay); | |
c998da0d SR |
139 | |
140 | /* | |
141 | * Do a minimum delay of the larger value of 100ms or pgood_delay | |
142 | * so that the power can stablize before the devices are queried | |
143 | */ | |
144 | hub->query_delay = get_timer(0) + max(100, (int)pgood_delay); | |
145 | ||
146 | /* | |
147 | * Record the power-on timeout here. The max. delay (timeout) | |
148 | * will be done based on this value in the USB port loop in | |
149 | * usb_hub_configure() later. | |
150 | */ | |
151 | hub->connect_timeout = hub->query_delay + 1000; | |
152 | debug("devnum=%d poweron: query_delay=%d connect_timeout=%d\n", | |
153 | dev->devnum, max(100, (int)pgood_delay), | |
154 | max(100, (int)pgood_delay) + 1000); | |
23faf2bc MV |
155 | } |
156 | ||
157 | void usb_hub_reset(void) | |
158 | { | |
159 | usb_hub_index = 0; | |
c998da0d SR |
160 | |
161 | /* Zero out global hub_dev in case its re-used again */ | |
162 | memset(hub_dev, 0, sizeof(hub_dev)); | |
23faf2bc MV |
163 | } |
164 | ||
165 | static struct usb_hub_device *usb_hub_allocate(void) | |
166 | { | |
167 | if (usb_hub_index < USB_MAX_HUB) | |
168 | return &hub_dev[usb_hub_index++]; | |
169 | ||
170 | printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB); | |
171 | return NULL; | |
172 | } | |
173 | ||
174 | #define MAX_TRIES 5 | |
175 | ||
176 | static inline char *portspeed(int portstatus) | |
177 | { | |
55f4b575 VG |
178 | char *speed_str; |
179 | ||
180 | switch (portstatus & USB_PORT_STAT_SPEED_MASK) { | |
181 | case USB_PORT_STAT_SUPER_SPEED: | |
182 | speed_str = "5 Gb/s"; | |
183 | break; | |
184 | case USB_PORT_STAT_HIGH_SPEED: | |
185 | speed_str = "480 Mb/s"; | |
186 | break; | |
187 | case USB_PORT_STAT_LOW_SPEED: | |
188 | speed_str = "1.5 Mb/s"; | |
189 | break; | |
190 | default: | |
191 | speed_str = "12 Mb/s"; | |
192 | break; | |
193 | } | |
194 | ||
195 | return speed_str; | |
23faf2bc MV |
196 | } |
197 | ||
862e75c0 | 198 | int legacy_hub_port_reset(struct usb_device *dev, int port, |
23faf2bc MV |
199 | unsigned short *portstat) |
200 | { | |
ad84a42f | 201 | int err, tries; |
f5766139 | 202 | ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1); |
23faf2bc | 203 | unsigned short portstatus, portchange; |
f7f60100 | 204 | int delay = HUB_SHORT_RESET_TIME; /* start with short reset delay */ |
23faf2bc | 205 | |
054fe48e SG |
206 | #ifdef CONFIG_DM_USB |
207 | debug("%s: resetting '%s' port %d...\n", __func__, dev->dev->name, | |
208 | port + 1); | |
209 | #else | |
210 | debug("%s: resetting port %d...\n", __func__, port + 1); | |
211 | #endif | |
23faf2bc | 212 | for (tries = 0; tries < MAX_TRIES; tries++) { |
ad84a42f HG |
213 | err = usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET); |
214 | if (err < 0) | |
215 | return err; | |
23faf2bc | 216 | |
f7f60100 | 217 | mdelay(delay); |
23faf2bc | 218 | |
f5766139 | 219 | if (usb_get_port_status(dev, port + 1, portsts) < 0) { |
ceb4972a VG |
220 | debug("get_port_status failed status %lX\n", |
221 | dev->status); | |
23faf2bc MV |
222 | return -1; |
223 | } | |
f5766139 PS |
224 | portstatus = le16_to_cpu(portsts->wPortStatus); |
225 | portchange = le16_to_cpu(portsts->wPortChange); | |
23faf2bc | 226 | |
ceb4972a VG |
227 | debug("portstatus %x, change %x, %s\n", portstatus, portchange, |
228 | portspeed(portstatus)); | |
23faf2bc | 229 | |
ceb4972a VG |
230 | debug("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \ |
231 | " USB_PORT_STAT_ENABLE %d\n", | |
232 | (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0, | |
233 | (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0, | |
234 | (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0); | |
23faf2bc | 235 | |
74c0d756 SW |
236 | /* |
237 | * Perhaps we should check for the following here: | |
238 | * - C_CONNECTION hasn't been set. | |
239 | * - CONNECTION is still set. | |
240 | * | |
241 | * Doing so would ensure that the device is still connected | |
242 | * to the bus, and hasn't been unplugged or replaced while the | |
243 | * USB bus reset was going on. | |
244 | * | |
245 | * However, if we do that, then (at least) a San Disk Ultra | |
246 | * USB 3.0 16GB device fails to reset on (at least) an NVIDIA | |
247 | * Tegra Jetson TK1 board. For some reason, the device appears | |
248 | * to briefly drop off the bus when this second bus reset is | |
249 | * executed, yet if we retry this loop, it'll eventually come | |
250 | * back after another reset or two. | |
251 | */ | |
23faf2bc MV |
252 | |
253 | if (portstatus & USB_PORT_STAT_ENABLE) | |
254 | break; | |
255 | ||
f7f60100 SR |
256 | /* Switch to long reset delay for the next round */ |
257 | delay = HUB_LONG_RESET_TIME; | |
23faf2bc MV |
258 | } |
259 | ||
260 | if (tries == MAX_TRIES) { | |
ceb4972a VG |
261 | debug("Cannot enable port %i after %i retries, " \ |
262 | "disabling port.\n", port + 1, MAX_TRIES); | |
263 | debug("Maybe the USB cable is bad?\n"); | |
23faf2bc MV |
264 | return -1; |
265 | } | |
266 | ||
267 | usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET); | |
268 | *portstat = portstatus; | |
269 | return 0; | |
270 | } | |
271 | ||
054fe48e SG |
272 | #ifdef CONFIG_DM_USB |
273 | int hub_port_reset(struct udevice *dev, int port, unsigned short *portstat) | |
274 | { | |
bcbe3d15 | 275 | struct usb_device *udev = dev_get_parent_priv(dev); |
054fe48e SG |
276 | |
277 | return legacy_hub_port_reset(udev, port, portstat); | |
278 | } | |
279 | #endif | |
23faf2bc | 280 | |
79b58887 | 281 | int usb_hub_port_connect_change(struct usb_device *dev, int port) |
23faf2bc | 282 | { |
f5766139 | 283 | ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1); |
23faf2bc | 284 | unsigned short portstatus; |
79b58887 | 285 | int ret, speed; |
23faf2bc MV |
286 | |
287 | /* Check status */ | |
79b58887 SG |
288 | ret = usb_get_port_status(dev, port + 1, portsts); |
289 | if (ret < 0) { | |
ceb4972a | 290 | debug("get_port_status failed\n"); |
79b58887 | 291 | return ret; |
23faf2bc MV |
292 | } |
293 | ||
f5766139 | 294 | portstatus = le16_to_cpu(portsts->wPortStatus); |
ceb4972a VG |
295 | debug("portstatus %x, change %x, %s\n", |
296 | portstatus, | |
297 | le16_to_cpu(portsts->wPortChange), | |
298 | portspeed(portstatus)); | |
23faf2bc MV |
299 | |
300 | /* Clear the connection change status */ | |
301 | usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION); | |
302 | ||
303 | /* Disconnect any existing devices under this port */ | |
304 | if (((!(portstatus & USB_PORT_STAT_CONNECTION)) && | |
054fe48e SG |
305 | (!(portstatus & USB_PORT_STAT_ENABLE))) || |
306 | usb_device_has_child_on_port(dev, port)) { | |
ceb4972a | 307 | debug("usb_disconnect(&hub->children[port]);\n"); |
23faf2bc MV |
308 | /* Return now if nothing is connected */ |
309 | if (!(portstatus & USB_PORT_STAT_CONNECTION)) | |
79b58887 | 310 | return -ENOTCONN; |
23faf2bc | 311 | } |
23faf2bc MV |
312 | |
313 | /* Reset the port */ | |
862e75c0 | 314 | ret = legacy_hub_port_reset(dev, port, &portstatus); |
79b58887 | 315 | if (ret < 0) { |
45b9ea1d HG |
316 | if (ret != -ENXIO) |
317 | printf("cannot reset port %i!?\n", port + 1); | |
79b58887 | 318 | return ret; |
23faf2bc MV |
319 | } |
320 | ||
55f4b575 VG |
321 | switch (portstatus & USB_PORT_STAT_SPEED_MASK) { |
322 | case USB_PORT_STAT_SUPER_SPEED: | |
79b58887 | 323 | speed = USB_SPEED_SUPER; |
55f4b575 VG |
324 | break; |
325 | case USB_PORT_STAT_HIGH_SPEED: | |
79b58887 | 326 | speed = USB_SPEED_HIGH; |
55f4b575 VG |
327 | break; |
328 | case USB_PORT_STAT_LOW_SPEED: | |
79b58887 | 329 | speed = USB_SPEED_LOW; |
55f4b575 VG |
330 | break; |
331 | default: | |
79b58887 | 332 | speed = USB_SPEED_FULL; |
55f4b575 VG |
333 | break; |
334 | } | |
23faf2bc | 335 | |
054fe48e SG |
336 | #ifdef CONFIG_DM_USB |
337 | struct udevice *child; | |
338 | ||
339 | ret = usb_scan_device(dev->dev, port + 1, speed, &child); | |
340 | #else | |
341 | struct usb_device *usb; | |
342 | ||
79b58887 SG |
343 | ret = usb_alloc_new_device(dev->controller, &usb); |
344 | if (ret) { | |
345 | printf("cannot create new device: ret=%d", ret); | |
346 | return ret; | |
347 | } | |
348 | ||
23faf2bc | 349 | dev->children[port] = usb; |
79b58887 | 350 | usb->speed = speed; |
23faf2bc MV |
351 | usb->parent = dev; |
352 | usb->portnr = port + 1; | |
353 | /* Run it through the hoops (find a driver, etc) */ | |
79b58887 SG |
354 | ret = usb_new_device(usb); |
355 | if (ret < 0) { | |
23faf2bc | 356 | /* Woops, disable the port */ |
79b58887 | 357 | usb_free_device(dev->controller); |
359439d2 | 358 | dev->children[port] = NULL; |
054fe48e SG |
359 | } |
360 | #endif | |
361 | if (ret < 0) { | |
ceb4972a | 362 | debug("hub: disabling port %d\n", port + 1); |
23faf2bc MV |
363 | usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE); |
364 | } | |
79b58887 SG |
365 | |
366 | return ret; | |
23faf2bc MV |
367 | } |
368 | ||
c998da0d SR |
369 | static int usb_scan_port(struct usb_device_scan *usb_scan) |
370 | { | |
371 | ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1); | |
372 | unsigned short portstatus; | |
373 | unsigned short portchange; | |
374 | struct usb_device *dev; | |
375 | struct usb_hub_device *hub; | |
376 | int ret = 0; | |
377 | int i; | |
378 | ||
379 | dev = usb_scan->dev; | |
380 | hub = usb_scan->hub; | |
381 | i = usb_scan->port; | |
382 | ||
383 | /* | |
384 | * Don't talk to the device before the query delay is expired. | |
385 | * This is needed for voltages to stabalize. | |
386 | */ | |
387 | if (get_timer(0) < hub->query_delay) | |
388 | return 0; | |
389 | ||
390 | ret = usb_get_port_status(dev, i + 1, portsts); | |
391 | if (ret < 0) { | |
392 | debug("get_port_status failed\n"); | |
393 | if (get_timer(0) >= hub->connect_timeout) { | |
394 | debug("devnum=%d port=%d: timeout\n", | |
395 | dev->devnum, i + 1); | |
396 | /* Remove this device from scanning list */ | |
397 | list_del(&usb_scan->list); | |
398 | free(usb_scan); | |
399 | return 0; | |
400 | } | |
d81db48d | 401 | return 0; |
c998da0d SR |
402 | } |
403 | ||
404 | portstatus = le16_to_cpu(portsts->wPortStatus); | |
405 | portchange = le16_to_cpu(portsts->wPortChange); | |
406 | debug("Port %d Status %X Change %X\n", i + 1, portstatus, portchange); | |
407 | ||
408 | /* No connection change happened, wait a bit more. */ | |
409 | if (!(portchange & USB_PORT_STAT_C_CONNECTION)) { | |
410 | if (get_timer(0) >= hub->connect_timeout) { | |
411 | debug("devnum=%d port=%d: timeout\n", | |
412 | dev->devnum, i + 1); | |
413 | /* Remove this device from scanning list */ | |
414 | list_del(&usb_scan->list); | |
415 | free(usb_scan); | |
416 | return 0; | |
417 | } | |
418 | return 0; | |
419 | } | |
420 | ||
421 | /* Test if the connection came up, and if not exit */ | |
422 | if (!(portstatus & USB_PORT_STAT_CONNECTION)) | |
423 | return 0; | |
424 | ||
425 | /* A new USB device is ready at this point */ | |
426 | debug("devnum=%d port=%d: USB dev found\n", dev->devnum, i + 1); | |
427 | ||
428 | usb_hub_port_connect_change(dev, i); | |
429 | ||
430 | if (portchange & USB_PORT_STAT_C_ENABLE) { | |
431 | debug("port %d enable change, status %x\n", i + 1, portstatus); | |
432 | usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_ENABLE); | |
433 | /* | |
434 | * The following hack causes a ghost device problem | |
435 | * to Faraday EHCI | |
436 | */ | |
437 | #ifndef CONFIG_USB_EHCI_FARADAY | |
438 | /* | |
439 | * EM interference sometimes causes bad shielded USB | |
440 | * devices to be shutdown by the hub, this hack enables | |
441 | * them again. Works at least with mouse driver | |
442 | */ | |
443 | if (!(portstatus & USB_PORT_STAT_ENABLE) && | |
444 | (portstatus & USB_PORT_STAT_CONNECTION) && | |
445 | usb_device_has_child_on_port(dev, i)) { | |
446 | debug("already running port %i disabled by hub (EMI?), re-enabling...\n", | |
447 | i + 1); | |
448 | usb_hub_port_connect_change(dev, i); | |
449 | } | |
450 | #endif | |
451 | } | |
452 | ||
453 | if (portstatus & USB_PORT_STAT_SUSPEND) { | |
454 | debug("port %d suspend change\n", i + 1); | |
455 | usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_SUSPEND); | |
456 | } | |
457 | ||
458 | if (portchange & USB_PORT_STAT_C_OVERCURRENT) { | |
459 | debug("port %d over-current change\n", i + 1); | |
460 | usb_clear_port_feature(dev, i + 1, | |
461 | USB_PORT_FEAT_C_OVER_CURRENT); | |
462 | /* Only power-on this one port */ | |
463 | usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER); | |
464 | hub->overcurrent_count[i]++; | |
465 | ||
466 | /* | |
467 | * If the max-scan-count is not reached, return without removing | |
468 | * the device from scan-list. This will re-issue a new scan. | |
469 | */ | |
470 | if (hub->overcurrent_count[i] <= | |
471 | PORT_OVERCURRENT_MAX_SCAN_COUNT) | |
472 | return 0; | |
473 | ||
474 | /* Otherwise the device will get removed */ | |
eae4b2b6 | 475 | printf("Port %d over-current occurred %d times\n", i + 1, |
c998da0d SR |
476 | hub->overcurrent_count[i]); |
477 | } | |
478 | ||
479 | if (portchange & USB_PORT_STAT_C_RESET) { | |
480 | debug("port %d reset change\n", i + 1); | |
481 | usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET); | |
482 | } | |
483 | ||
484 | /* | |
485 | * We're done with this device, so let's remove this device from | |
486 | * scanning list | |
487 | */ | |
488 | list_del(&usb_scan->list); | |
489 | free(usb_scan); | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | static int usb_device_list_scan(void) | |
495 | { | |
496 | struct usb_device_scan *usb_scan; | |
497 | struct usb_device_scan *tmp; | |
498 | static int running; | |
499 | int ret = 0; | |
500 | ||
501 | /* Only run this loop once for each controller */ | |
502 | if (running) | |
503 | return 0; | |
504 | ||
505 | running = 1; | |
506 | ||
507 | while (1) { | |
508 | /* We're done, once the list is empty again */ | |
509 | if (list_empty(&usb_scan_list)) | |
510 | goto out; | |
511 | ||
512 | list_for_each_entry_safe(usb_scan, tmp, &usb_scan_list, list) { | |
513 | int ret; | |
514 | ||
515 | /* Scan this port */ | |
516 | ret = usb_scan_port(usb_scan); | |
517 | if (ret) | |
518 | goto out; | |
519 | } | |
520 | } | |
521 | ||
522 | out: | |
523 | /* | |
524 | * This USB controller has finished scanning all its connected | |
525 | * USB devices. Set "running" back to 0, so that other USB controllers | |
526 | * will scan their devices too. | |
527 | */ | |
528 | running = 0; | |
529 | ||
530 | return ret; | |
531 | } | |
23faf2bc MV |
532 | |
533 | static int usb_hub_configure(struct usb_device *dev) | |
534 | { | |
eaf3e613 | 535 | int i, length; |
f5766139 PS |
536 | ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ); |
537 | unsigned char *bitmap; | |
93ad908c | 538 | short hubCharacteristics; |
23faf2bc MV |
539 | struct usb_hub_descriptor *descriptor; |
540 | struct usb_hub_device *hub; | |
ceb4972a | 541 | __maybe_unused struct usb_hub_status *hubsts; |
361ad6af | 542 | int ret; |
23faf2bc MV |
543 | |
544 | /* "allocate" Hub device */ | |
545 | hub = usb_hub_allocate(); | |
546 | if (hub == NULL) | |
361ad6af | 547 | return -ENOMEM; |
23faf2bc MV |
548 | hub->pusb_dev = dev; |
549 | /* Get the the hub descriptor */ | |
361ad6af SG |
550 | ret = usb_get_hub_descriptor(dev, buffer, 4); |
551 | if (ret < 0) { | |
ceb4972a VG |
552 | debug("usb_hub_configure: failed to get hub " \ |
553 | "descriptor, giving up %lX\n", dev->status); | |
361ad6af | 554 | return ret; |
23faf2bc MV |
555 | } |
556 | descriptor = (struct usb_hub_descriptor *)buffer; | |
557 | ||
b4141195 MY |
558 | length = min_t(int, descriptor->bLength, |
559 | sizeof(struct usb_hub_descriptor)); | |
23faf2bc | 560 | |
361ad6af SG |
561 | ret = usb_get_hub_descriptor(dev, buffer, length); |
562 | if (ret < 0) { | |
ceb4972a VG |
563 | debug("usb_hub_configure: failed to get hub " \ |
564 | "descriptor 2nd giving up %lX\n", dev->status); | |
361ad6af | 565 | return ret; |
23faf2bc | 566 | } |
eaf3e613 | 567 | memcpy((unsigned char *)&hub->desc, buffer, length); |
23faf2bc | 568 | /* adjust 16bit values */ |
93ad908c LS |
569 | put_unaligned(le16_to_cpu(get_unaligned( |
570 | &descriptor->wHubCharacteristics)), | |
571 | &hub->desc.wHubCharacteristics); | |
23faf2bc MV |
572 | /* set the bitmap */ |
573 | bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0]; | |
574 | /* devices not removable by default */ | |
575 | memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); | |
576 | bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0]; | |
577 | memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */ | |
578 | ||
579 | for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++) | |
580 | hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i]; | |
581 | ||
582 | for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++) | |
583 | hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i]; | |
584 | ||
585 | dev->maxchild = descriptor->bNbrPorts; | |
ceb4972a | 586 | debug("%d ports detected\n", dev->maxchild); |
23faf2bc | 587 | |
93ad908c LS |
588 | hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics); |
589 | switch (hubCharacteristics & HUB_CHAR_LPSM) { | |
23faf2bc | 590 | case 0x00: |
ceb4972a | 591 | debug("ganged power switching\n"); |
23faf2bc MV |
592 | break; |
593 | case 0x01: | |
ceb4972a | 594 | debug("individual port power switching\n"); |
23faf2bc MV |
595 | break; |
596 | case 0x02: | |
597 | case 0x03: | |
ceb4972a | 598 | debug("unknown reserved power switching mode\n"); |
23faf2bc MV |
599 | break; |
600 | } | |
601 | ||
93ad908c | 602 | if (hubCharacteristics & HUB_CHAR_COMPOUND) |
ceb4972a | 603 | debug("part of a compound device\n"); |
23faf2bc | 604 | else |
ceb4972a | 605 | debug("standalone hub\n"); |
23faf2bc | 606 | |
93ad908c | 607 | switch (hubCharacteristics & HUB_CHAR_OCPM) { |
23faf2bc | 608 | case 0x00: |
ceb4972a | 609 | debug("global over-current protection\n"); |
23faf2bc MV |
610 | break; |
611 | case 0x08: | |
ceb4972a | 612 | debug("individual port over-current protection\n"); |
23faf2bc MV |
613 | break; |
614 | case 0x10: | |
615 | case 0x18: | |
ceb4972a | 616 | debug("no over-current protection\n"); |
23faf2bc MV |
617 | break; |
618 | } | |
619 | ||
ceb4972a VG |
620 | debug("power on to power good time: %dms\n", |
621 | descriptor->bPwrOn2PwrGood * 2); | |
622 | debug("hub controller current requirement: %dmA\n", | |
623 | descriptor->bHubContrCurrent); | |
23faf2bc MV |
624 | |
625 | for (i = 0; i < dev->maxchild; i++) | |
ceb4972a VG |
626 | debug("port %d is%s removable\n", i + 1, |
627 | hub->desc.DeviceRemovable[(i + 1) / 8] & \ | |
628 | (1 << ((i + 1) % 8)) ? " not" : ""); | |
23faf2bc MV |
629 | |
630 | if (sizeof(struct usb_hub_status) > USB_BUFSIZ) { | |
ceb4972a VG |
631 | debug("usb_hub_configure: failed to get Status - " \ |
632 | "too long: %d\n", descriptor->bLength); | |
361ad6af | 633 | return -EFBIG; |
23faf2bc MV |
634 | } |
635 | ||
361ad6af SG |
636 | ret = usb_get_hub_status(dev, buffer); |
637 | if (ret < 0) { | |
ceb4972a VG |
638 | debug("usb_hub_configure: failed to get Status %lX\n", |
639 | dev->status); | |
361ad6af | 640 | return ret; |
23faf2bc MV |
641 | } |
642 | ||
ceb4972a | 643 | #ifdef DEBUG |
23faf2bc MV |
644 | hubsts = (struct usb_hub_status *)buffer; |
645 | #endif | |
ceb4972a VG |
646 | |
647 | debug("get_hub_status returned status %X, change %X\n", | |
648 | le16_to_cpu(hubsts->wHubStatus), | |
649 | le16_to_cpu(hubsts->wHubChange)); | |
650 | debug("local power source is %s\n", | |
651 | (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \ | |
652 | "lost (inactive)" : "good"); | |
653 | debug("%sover-current condition exists\n", | |
654 | (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \ | |
655 | "" : "no "); | |
23faf2bc MV |
656 | usb_hub_power_on(hub); |
657 | ||
3615a996 DM |
658 | /* |
659 | * Reset any devices that may be in a bad state when applying | |
660 | * the power. This is a __weak function. Resetting of the devices | |
661 | * should occur in the board file of the device. | |
662 | */ | |
663 | for (i = 0; i < dev->maxchild; i++) | |
664 | usb_hub_reset_devices(i + 1); | |
665 | ||
c998da0d SR |
666 | /* |
667 | * Only add the connected USB devices, including potential hubs, | |
668 | * to a scanning list. This list will get scanned and devices that | |
669 | * are detected (either via port connected or via port timeout) | |
670 | * will get removed from this list. Scanning of the devices on this | |
671 | * list will continue until all devices are removed. | |
672 | */ | |
23faf2bc | 673 | for (i = 0; i < dev->maxchild; i++) { |
c998da0d | 674 | struct usb_device_scan *usb_scan; |
b6d7852c | 675 | |
c998da0d SR |
676 | usb_scan = calloc(1, sizeof(*usb_scan)); |
677 | if (!usb_scan) { | |
678 | printf("Can't allocate memory for USB device!\n"); | |
679 | return -ENOMEM; | |
23faf2bc | 680 | } |
c998da0d SR |
681 | usb_scan->dev = dev; |
682 | usb_scan->hub = hub; | |
683 | usb_scan->port = i; | |
684 | list_add_tail(&usb_scan->list, &usb_scan_list); | |
685 | } | |
23faf2bc | 686 | |
c998da0d SR |
687 | /* |
688 | * And now call the scanning code which loops over the generated list | |
689 | */ | |
690 | ret = usb_device_list_scan(); | |
23faf2bc | 691 | |
c998da0d | 692 | return ret; |
23faf2bc MV |
693 | } |
694 | ||
361ad6af | 695 | static int usb_hub_check(struct usb_device *dev, int ifnum) |
23faf2bc MV |
696 | { |
697 | struct usb_interface *iface; | |
361ad6af | 698 | struct usb_endpoint_descriptor *ep = NULL; |
23faf2bc MV |
699 | |
700 | iface = &dev->config.if_desc[ifnum]; | |
701 | /* Is it a hub? */ | |
702 | if (iface->desc.bInterfaceClass != USB_CLASS_HUB) | |
361ad6af | 703 | goto err; |
23faf2bc MV |
704 | /* Some hubs have a subclass of 1, which AFAICT according to the */ |
705 | /* specs is not defined, but it works */ | |
706 | if ((iface->desc.bInterfaceSubClass != 0) && | |
707 | (iface->desc.bInterfaceSubClass != 1)) | |
361ad6af | 708 | goto err; |
23faf2bc MV |
709 | /* Multiple endpoints? What kind of mutant ninja-hub is this? */ |
710 | if (iface->desc.bNumEndpoints != 1) | |
361ad6af | 711 | goto err; |
23faf2bc MV |
712 | ep = &iface->ep_desc[0]; |
713 | /* Output endpoint? Curiousier and curiousier.. */ | |
714 | if (!(ep->bEndpointAddress & USB_DIR_IN)) | |
361ad6af | 715 | goto err; |
23faf2bc MV |
716 | /* If it's not an interrupt endpoint, we'd better punt! */ |
717 | if ((ep->bmAttributes & 3) != 3) | |
361ad6af | 718 | goto err; |
23faf2bc | 719 | /* We found a hub */ |
ceb4972a | 720 | debug("USB hub found\n"); |
361ad6af SG |
721 | return 0; |
722 | ||
723 | err: | |
724 | debug("USB hub not found: bInterfaceClass=%d, bInterfaceSubClass=%d, bNumEndpoints=%d\n", | |
725 | iface->desc.bInterfaceClass, iface->desc.bInterfaceSubClass, | |
726 | iface->desc.bNumEndpoints); | |
727 | if (ep) { | |
728 | debug(" bEndpointAddress=%#x, bmAttributes=%d", | |
729 | ep->bEndpointAddress, ep->bmAttributes); | |
730 | } | |
731 | ||
732 | return -ENOENT; | |
733 | } | |
734 | ||
735 | int usb_hub_probe(struct usb_device *dev, int ifnum) | |
736 | { | |
737 | int ret; | |
738 | ||
739 | ret = usb_hub_check(dev, ifnum); | |
740 | if (ret) | |
741 | return 0; | |
23faf2bc MV |
742 | ret = usb_hub_configure(dev); |
743 | return ret; | |
744 | } | |
054fe48e SG |
745 | |
746 | #ifdef CONFIG_DM_USB | |
747 | int usb_hub_scan(struct udevice *hub) | |
748 | { | |
bcbe3d15 | 749 | struct usb_device *udev = dev_get_parent_priv(hub); |
054fe48e SG |
750 | |
751 | return usb_hub_configure(udev); | |
752 | } | |
753 | ||
054fe48e SG |
754 | static int usb_hub_post_probe(struct udevice *dev) |
755 | { | |
756 | debug("%s\n", __func__); | |
757 | return usb_hub_scan(dev); | |
758 | } | |
759 | ||
760 | static const struct udevice_id usb_hub_ids[] = { | |
761 | { .compatible = "usb-hub" }, | |
762 | { } | |
763 | }; | |
764 | ||
765 | U_BOOT_DRIVER(usb_generic_hub) = { | |
766 | .name = "usb_hub", | |
767 | .id = UCLASS_USB_HUB, | |
768 | .of_match = usb_hub_ids, | |
769 | .flags = DM_FLAG_ALLOC_PRIV_DMA, | |
770 | }; | |
771 | ||
772 | UCLASS_DRIVER(usb_hub) = { | |
773 | .id = UCLASS_USB_HUB, | |
774 | .name = "usb_hub", | |
91195485 | 775 | .post_bind = dm_scan_fdt_dev, |
054fe48e SG |
776 | .post_probe = usb_hub_post_probe, |
777 | .child_pre_probe = usb_child_pre_probe, | |
778 | .per_child_auto_alloc_size = sizeof(struct usb_device), | |
779 | .per_child_platdata_auto_alloc_size = sizeof(struct usb_dev_platdata), | |
780 | }; | |
781 | ||
782 | static const struct usb_device_id hub_id_table[] = { | |
783 | { | |
784 | .match_flags = USB_DEVICE_ID_MATCH_DEV_CLASS, | |
785 | .bDeviceClass = USB_CLASS_HUB | |
786 | }, | |
787 | { } /* Terminating entry */ | |
788 | }; | |
789 | ||
abb59cff | 790 | U_BOOT_USB_DEVICE(usb_generic_hub, hub_id_table); |
054fe48e SG |
791 | |
792 | #endif |