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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> | |
43 | #ifdef CONFIG_4xx | |
44 | #include <asm/4xx_pci.h> | |
45 | #endif | |
46 | ||
23faf2bc MV |
47 | #define USB_BUFSIZ 512 |
48 | ||
f7f60100 SR |
49 | #define HUB_SHORT_RESET_TIME 20 |
50 | #define HUB_LONG_RESET_TIME 200 | |
51 | ||
c998da0d SR |
52 | #define PORT_OVERCURRENT_MAX_SCAN_COUNT 3 |
53 | ||
54 | struct usb_device_scan { | |
55 | struct usb_device *dev; /* USB hub device to scan */ | |
56 | struct usb_hub_device *hub; /* USB hub struct */ | |
57 | int port; /* USB port to scan */ | |
58 | struct list_head list; | |
59 | }; | |
60 | ||
054fe48e | 61 | /* TODO(sjg@chromium.org): Remove this when CONFIG_DM_USB is defined */ |
23faf2bc MV |
62 | static struct usb_hub_device hub_dev[USB_MAX_HUB]; |
63 | static int usb_hub_index; | |
c998da0d | 64 | static LIST_HEAD(usb_scan_list); |
23faf2bc | 65 | |
3615a996 DM |
66 | __weak void usb_hub_reset_devices(int port) |
67 | { | |
68 | return; | |
69 | } | |
23faf2bc MV |
70 | |
71 | static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size) | |
72 | { | |
73 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
74 | USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB, | |
75 | USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT); | |
76 | } | |
77 | ||
78 | static int usb_clear_port_feature(struct usb_device *dev, int port, int feature) | |
79 | { | |
80 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
81 | USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature, | |
82 | port, NULL, 0, USB_CNTL_TIMEOUT); | |
83 | } | |
84 | ||
85 | static int usb_set_port_feature(struct usb_device *dev, int port, int feature) | |
86 | { | |
87 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
88 | USB_REQ_SET_FEATURE, USB_RT_PORT, feature, | |
89 | port, NULL, 0, USB_CNTL_TIMEOUT); | |
90 | } | |
91 | ||
92 | static int usb_get_hub_status(struct usb_device *dev, void *data) | |
93 | { | |
94 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
95 | USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0, | |
96 | data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT); | |
97 | } | |
98 | ||
08f3bb0b | 99 | int usb_get_port_status(struct usb_device *dev, int port, void *data) |
23faf2bc MV |
100 | { |
101 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
102 | USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port, | |
103 | data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT); | |
104 | } | |
105 | ||
106 | ||
107 | static void usb_hub_power_on(struct usb_hub_device *hub) | |
108 | { | |
109 | int i; | |
110 | struct usb_device *dev; | |
a1a28c6e | 111 | unsigned pgood_delay = hub->desc.bPwrOn2PwrGood * 2; |
319418c0 | 112 | const char *env; |
23faf2bc MV |
113 | |
114 | dev = hub->pusb_dev; | |
0bf796f7 | 115 | |
ceb4972a | 116 | debug("enabling power on all ports\n"); |
0bf796f7 | 117 | for (i = 0; i < dev->maxchild; i++) { |
23faf2bc | 118 | usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER); |
ceb4972a | 119 | debug("port %d returns %lX\n", i + 1, dev->status); |
23faf2bc | 120 | } |
a1a28c6e | 121 | |
c998da0d SR |
122 | #ifdef CONFIG_SANDBOX |
123 | /* | |
124 | * Don't set timeout / delay values here. This results | |
125 | * in these values still being reset to 0. | |
126 | */ | |
127 | if (state_get_skip_delays()) | |
128 | return; | |
129 | #endif | |
130 | ||
0d437bca SW |
131 | /* |
132 | * Wait for power to become stable, | |
133 | * plus spec-defined max time for device to connect | |
319418c0 TH |
134 | * but allow this time to be increased via env variable as some |
135 | * devices break the spec and require longer warm-up times | |
0d437bca | 136 | */ |
319418c0 TH |
137 | env = getenv("usb_pgood_delay"); |
138 | if (env) | |
139 | pgood_delay = max(pgood_delay, | |
140 | (unsigned)simple_strtol(env, NULL, 0)); | |
141 | debug("pgood_delay=%dms\n", pgood_delay); | |
c998da0d SR |
142 | |
143 | /* | |
144 | * Do a minimum delay of the larger value of 100ms or pgood_delay | |
145 | * so that the power can stablize before the devices are queried | |
146 | */ | |
147 | hub->query_delay = get_timer(0) + max(100, (int)pgood_delay); | |
148 | ||
149 | /* | |
150 | * Record the power-on timeout here. The max. delay (timeout) | |
151 | * will be done based on this value in the USB port loop in | |
152 | * usb_hub_configure() later. | |
153 | */ | |
154 | hub->connect_timeout = hub->query_delay + 1000; | |
155 | debug("devnum=%d poweron: query_delay=%d connect_timeout=%d\n", | |
156 | dev->devnum, max(100, (int)pgood_delay), | |
157 | max(100, (int)pgood_delay) + 1000); | |
23faf2bc MV |
158 | } |
159 | ||
160 | void usb_hub_reset(void) | |
161 | { | |
162 | usb_hub_index = 0; | |
c998da0d SR |
163 | |
164 | /* Zero out global hub_dev in case its re-used again */ | |
165 | memset(hub_dev, 0, sizeof(hub_dev)); | |
23faf2bc MV |
166 | } |
167 | ||
168 | static struct usb_hub_device *usb_hub_allocate(void) | |
169 | { | |
170 | if (usb_hub_index < USB_MAX_HUB) | |
171 | return &hub_dev[usb_hub_index++]; | |
172 | ||
173 | printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB); | |
174 | return NULL; | |
175 | } | |
176 | ||
177 | #define MAX_TRIES 5 | |
178 | ||
179 | static inline char *portspeed(int portstatus) | |
180 | { | |
55f4b575 VG |
181 | char *speed_str; |
182 | ||
183 | switch (portstatus & USB_PORT_STAT_SPEED_MASK) { | |
184 | case USB_PORT_STAT_SUPER_SPEED: | |
185 | speed_str = "5 Gb/s"; | |
186 | break; | |
187 | case USB_PORT_STAT_HIGH_SPEED: | |
188 | speed_str = "480 Mb/s"; | |
189 | break; | |
190 | case USB_PORT_STAT_LOW_SPEED: | |
191 | speed_str = "1.5 Mb/s"; | |
192 | break; | |
193 | default: | |
194 | speed_str = "12 Mb/s"; | |
195 | break; | |
196 | } | |
197 | ||
198 | return speed_str; | |
23faf2bc MV |
199 | } |
200 | ||
862e75c0 | 201 | int legacy_hub_port_reset(struct usb_device *dev, int port, |
23faf2bc MV |
202 | unsigned short *portstat) |
203 | { | |
ad84a42f | 204 | int err, tries; |
f5766139 | 205 | ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1); |
23faf2bc | 206 | unsigned short portstatus, portchange; |
f7f60100 | 207 | int delay = HUB_SHORT_RESET_TIME; /* start with short reset delay */ |
23faf2bc | 208 | |
054fe48e SG |
209 | #ifdef CONFIG_DM_USB |
210 | debug("%s: resetting '%s' port %d...\n", __func__, dev->dev->name, | |
211 | port + 1); | |
212 | #else | |
213 | debug("%s: resetting port %d...\n", __func__, port + 1); | |
214 | #endif | |
23faf2bc | 215 | for (tries = 0; tries < MAX_TRIES; tries++) { |
ad84a42f HG |
216 | err = usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET); |
217 | if (err < 0) | |
218 | return err; | |
23faf2bc | 219 | |
f7f60100 | 220 | mdelay(delay); |
23faf2bc | 221 | |
f5766139 | 222 | if (usb_get_port_status(dev, port + 1, portsts) < 0) { |
ceb4972a VG |
223 | debug("get_port_status failed status %lX\n", |
224 | dev->status); | |
23faf2bc MV |
225 | return -1; |
226 | } | |
f5766139 PS |
227 | portstatus = le16_to_cpu(portsts->wPortStatus); |
228 | portchange = le16_to_cpu(portsts->wPortChange); | |
23faf2bc | 229 | |
ceb4972a VG |
230 | debug("portstatus %x, change %x, %s\n", portstatus, portchange, |
231 | portspeed(portstatus)); | |
23faf2bc | 232 | |
ceb4972a VG |
233 | debug("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \ |
234 | " USB_PORT_STAT_ENABLE %d\n", | |
235 | (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0, | |
236 | (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0, | |
237 | (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0); | |
23faf2bc | 238 | |
74c0d756 SW |
239 | /* |
240 | * Perhaps we should check for the following here: | |
241 | * - C_CONNECTION hasn't been set. | |
242 | * - CONNECTION is still set. | |
243 | * | |
244 | * Doing so would ensure that the device is still connected | |
245 | * to the bus, and hasn't been unplugged or replaced while the | |
246 | * USB bus reset was going on. | |
247 | * | |
248 | * However, if we do that, then (at least) a San Disk Ultra | |
249 | * USB 3.0 16GB device fails to reset on (at least) an NVIDIA | |
250 | * Tegra Jetson TK1 board. For some reason, the device appears | |
251 | * to briefly drop off the bus when this second bus reset is | |
252 | * executed, yet if we retry this loop, it'll eventually come | |
253 | * back after another reset or two. | |
254 | */ | |
23faf2bc MV |
255 | |
256 | if (portstatus & USB_PORT_STAT_ENABLE) | |
257 | break; | |
258 | ||
f7f60100 SR |
259 | /* Switch to long reset delay for the next round */ |
260 | delay = HUB_LONG_RESET_TIME; | |
23faf2bc MV |
261 | } |
262 | ||
263 | if (tries == MAX_TRIES) { | |
ceb4972a VG |
264 | debug("Cannot enable port %i after %i retries, " \ |
265 | "disabling port.\n", port + 1, MAX_TRIES); | |
266 | debug("Maybe the USB cable is bad?\n"); | |
23faf2bc MV |
267 | return -1; |
268 | } | |
269 | ||
270 | usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET); | |
271 | *portstat = portstatus; | |
272 | return 0; | |
273 | } | |
274 | ||
054fe48e SG |
275 | #ifdef CONFIG_DM_USB |
276 | int hub_port_reset(struct udevice *dev, int port, unsigned short *portstat) | |
277 | { | |
bcbe3d15 | 278 | struct usb_device *udev = dev_get_parent_priv(dev); |
054fe48e SG |
279 | |
280 | return legacy_hub_port_reset(udev, port, portstat); | |
281 | } | |
282 | #endif | |
23faf2bc | 283 | |
79b58887 | 284 | int usb_hub_port_connect_change(struct usb_device *dev, int port) |
23faf2bc | 285 | { |
f5766139 | 286 | ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1); |
23faf2bc | 287 | unsigned short portstatus; |
79b58887 | 288 | int ret, speed; |
23faf2bc MV |
289 | |
290 | /* Check status */ | |
79b58887 SG |
291 | ret = usb_get_port_status(dev, port + 1, portsts); |
292 | if (ret < 0) { | |
ceb4972a | 293 | debug("get_port_status failed\n"); |
79b58887 | 294 | return ret; |
23faf2bc MV |
295 | } |
296 | ||
f5766139 | 297 | portstatus = le16_to_cpu(portsts->wPortStatus); |
ceb4972a VG |
298 | debug("portstatus %x, change %x, %s\n", |
299 | portstatus, | |
300 | le16_to_cpu(portsts->wPortChange), | |
301 | portspeed(portstatus)); | |
23faf2bc MV |
302 | |
303 | /* Clear the connection change status */ | |
304 | usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION); | |
305 | ||
306 | /* Disconnect any existing devices under this port */ | |
307 | if (((!(portstatus & USB_PORT_STAT_CONNECTION)) && | |
054fe48e SG |
308 | (!(portstatus & USB_PORT_STAT_ENABLE))) || |
309 | usb_device_has_child_on_port(dev, port)) { | |
ceb4972a | 310 | debug("usb_disconnect(&hub->children[port]);\n"); |
23faf2bc MV |
311 | /* Return now if nothing is connected */ |
312 | if (!(portstatus & USB_PORT_STAT_CONNECTION)) | |
79b58887 | 313 | return -ENOTCONN; |
23faf2bc | 314 | } |
23faf2bc MV |
315 | |
316 | /* Reset the port */ | |
862e75c0 | 317 | ret = legacy_hub_port_reset(dev, port, &portstatus); |
79b58887 | 318 | if (ret < 0) { |
45b9ea1d HG |
319 | if (ret != -ENXIO) |
320 | printf("cannot reset port %i!?\n", port + 1); | |
79b58887 | 321 | return ret; |
23faf2bc MV |
322 | } |
323 | ||
55f4b575 VG |
324 | switch (portstatus & USB_PORT_STAT_SPEED_MASK) { |
325 | case USB_PORT_STAT_SUPER_SPEED: | |
79b58887 | 326 | speed = USB_SPEED_SUPER; |
55f4b575 VG |
327 | break; |
328 | case USB_PORT_STAT_HIGH_SPEED: | |
79b58887 | 329 | speed = USB_SPEED_HIGH; |
55f4b575 VG |
330 | break; |
331 | case USB_PORT_STAT_LOW_SPEED: | |
79b58887 | 332 | speed = USB_SPEED_LOW; |
55f4b575 VG |
333 | break; |
334 | default: | |
79b58887 | 335 | speed = USB_SPEED_FULL; |
55f4b575 VG |
336 | break; |
337 | } | |
23faf2bc | 338 | |
054fe48e SG |
339 | #ifdef CONFIG_DM_USB |
340 | struct udevice *child; | |
341 | ||
342 | ret = usb_scan_device(dev->dev, port + 1, speed, &child); | |
343 | #else | |
344 | struct usb_device *usb; | |
345 | ||
79b58887 SG |
346 | ret = usb_alloc_new_device(dev->controller, &usb); |
347 | if (ret) { | |
348 | printf("cannot create new device: ret=%d", ret); | |
349 | return ret; | |
350 | } | |
351 | ||
23faf2bc | 352 | dev->children[port] = usb; |
79b58887 | 353 | usb->speed = speed; |
23faf2bc MV |
354 | usb->parent = dev; |
355 | usb->portnr = port + 1; | |
356 | /* Run it through the hoops (find a driver, etc) */ | |
79b58887 SG |
357 | ret = usb_new_device(usb); |
358 | if (ret < 0) { | |
23faf2bc | 359 | /* Woops, disable the port */ |
79b58887 | 360 | usb_free_device(dev->controller); |
359439d2 | 361 | dev->children[port] = NULL; |
054fe48e SG |
362 | } |
363 | #endif | |
364 | if (ret < 0) { | |
ceb4972a | 365 | debug("hub: disabling port %d\n", port + 1); |
23faf2bc MV |
366 | usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE); |
367 | } | |
79b58887 SG |
368 | |
369 | return ret; | |
23faf2bc MV |
370 | } |
371 | ||
c998da0d SR |
372 | static int usb_scan_port(struct usb_device_scan *usb_scan) |
373 | { | |
374 | ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1); | |
375 | unsigned short portstatus; | |
376 | unsigned short portchange; | |
377 | struct usb_device *dev; | |
378 | struct usb_hub_device *hub; | |
379 | int ret = 0; | |
380 | int i; | |
381 | ||
382 | dev = usb_scan->dev; | |
383 | hub = usb_scan->hub; | |
384 | i = usb_scan->port; | |
385 | ||
386 | /* | |
387 | * Don't talk to the device before the query delay is expired. | |
388 | * This is needed for voltages to stabalize. | |
389 | */ | |
390 | if (get_timer(0) < hub->query_delay) | |
391 | return 0; | |
392 | ||
393 | ret = usb_get_port_status(dev, i + 1, portsts); | |
394 | if (ret < 0) { | |
395 | debug("get_port_status failed\n"); | |
396 | if (get_timer(0) >= hub->connect_timeout) { | |
397 | debug("devnum=%d port=%d: timeout\n", | |
398 | dev->devnum, i + 1); | |
399 | /* Remove this device from scanning list */ | |
400 | list_del(&usb_scan->list); | |
401 | free(usb_scan); | |
402 | return 0; | |
403 | } | |
d81db48d | 404 | return 0; |
c998da0d SR |
405 | } |
406 | ||
407 | portstatus = le16_to_cpu(portsts->wPortStatus); | |
408 | portchange = le16_to_cpu(portsts->wPortChange); | |
409 | debug("Port %d Status %X Change %X\n", i + 1, portstatus, portchange); | |
410 | ||
411 | /* No connection change happened, wait a bit more. */ | |
412 | if (!(portchange & USB_PORT_STAT_C_CONNECTION)) { | |
413 | if (get_timer(0) >= hub->connect_timeout) { | |
414 | debug("devnum=%d port=%d: timeout\n", | |
415 | dev->devnum, i + 1); | |
416 | /* Remove this device from scanning list */ | |
417 | list_del(&usb_scan->list); | |
418 | free(usb_scan); | |
419 | return 0; | |
420 | } | |
421 | return 0; | |
422 | } | |
423 | ||
424 | /* Test if the connection came up, and if not exit */ | |
425 | if (!(portstatus & USB_PORT_STAT_CONNECTION)) | |
426 | return 0; | |
427 | ||
428 | /* A new USB device is ready at this point */ | |
429 | debug("devnum=%d port=%d: USB dev found\n", dev->devnum, i + 1); | |
430 | ||
431 | usb_hub_port_connect_change(dev, i); | |
432 | ||
433 | if (portchange & USB_PORT_STAT_C_ENABLE) { | |
434 | debug("port %d enable change, status %x\n", i + 1, portstatus); | |
435 | usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_ENABLE); | |
436 | /* | |
437 | * The following hack causes a ghost device problem | |
438 | * to Faraday EHCI | |
439 | */ | |
440 | #ifndef CONFIG_USB_EHCI_FARADAY | |
441 | /* | |
442 | * EM interference sometimes causes bad shielded USB | |
443 | * devices to be shutdown by the hub, this hack enables | |
444 | * them again. Works at least with mouse driver | |
445 | */ | |
446 | if (!(portstatus & USB_PORT_STAT_ENABLE) && | |
447 | (portstatus & USB_PORT_STAT_CONNECTION) && | |
448 | usb_device_has_child_on_port(dev, i)) { | |
449 | debug("already running port %i disabled by hub (EMI?), re-enabling...\n", | |
450 | i + 1); | |
451 | usb_hub_port_connect_change(dev, i); | |
452 | } | |
453 | #endif | |
454 | } | |
455 | ||
456 | if (portstatus & USB_PORT_STAT_SUSPEND) { | |
457 | debug("port %d suspend change\n", i + 1); | |
458 | usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_SUSPEND); | |
459 | } | |
460 | ||
461 | if (portchange & USB_PORT_STAT_C_OVERCURRENT) { | |
462 | debug("port %d over-current change\n", i + 1); | |
463 | usb_clear_port_feature(dev, i + 1, | |
464 | USB_PORT_FEAT_C_OVER_CURRENT); | |
465 | /* Only power-on this one port */ | |
466 | usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER); | |
467 | hub->overcurrent_count[i]++; | |
468 | ||
469 | /* | |
470 | * If the max-scan-count is not reached, return without removing | |
471 | * the device from scan-list. This will re-issue a new scan. | |
472 | */ | |
473 | if (hub->overcurrent_count[i] <= | |
474 | PORT_OVERCURRENT_MAX_SCAN_COUNT) | |
475 | return 0; | |
476 | ||
477 | /* Otherwise the device will get removed */ | |
eae4b2b6 | 478 | printf("Port %d over-current occurred %d times\n", i + 1, |
c998da0d SR |
479 | hub->overcurrent_count[i]); |
480 | } | |
481 | ||
482 | if (portchange & USB_PORT_STAT_C_RESET) { | |
483 | debug("port %d reset change\n", i + 1); | |
484 | usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET); | |
485 | } | |
486 | ||
487 | /* | |
488 | * We're done with this device, so let's remove this device from | |
489 | * scanning list | |
490 | */ | |
491 | list_del(&usb_scan->list); | |
492 | free(usb_scan); | |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
497 | static int usb_device_list_scan(void) | |
498 | { | |
499 | struct usb_device_scan *usb_scan; | |
500 | struct usb_device_scan *tmp; | |
501 | static int running; | |
502 | int ret = 0; | |
503 | ||
504 | /* Only run this loop once for each controller */ | |
505 | if (running) | |
506 | return 0; | |
507 | ||
508 | running = 1; | |
509 | ||
510 | while (1) { | |
511 | /* We're done, once the list is empty again */ | |
512 | if (list_empty(&usb_scan_list)) | |
513 | goto out; | |
514 | ||
515 | list_for_each_entry_safe(usb_scan, tmp, &usb_scan_list, list) { | |
516 | int ret; | |
517 | ||
518 | /* Scan this port */ | |
519 | ret = usb_scan_port(usb_scan); | |
520 | if (ret) | |
521 | goto out; | |
522 | } | |
523 | } | |
524 | ||
525 | out: | |
526 | /* | |
527 | * This USB controller has finished scanning all its connected | |
528 | * USB devices. Set "running" back to 0, so that other USB controllers | |
529 | * will scan their devices too. | |
530 | */ | |
531 | running = 0; | |
532 | ||
533 | return ret; | |
534 | } | |
23faf2bc MV |
535 | |
536 | static int usb_hub_configure(struct usb_device *dev) | |
537 | { | |
eaf3e613 | 538 | int i, length; |
f5766139 PS |
539 | ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ); |
540 | unsigned char *bitmap; | |
93ad908c | 541 | short hubCharacteristics; |
23faf2bc MV |
542 | struct usb_hub_descriptor *descriptor; |
543 | struct usb_hub_device *hub; | |
ceb4972a | 544 | __maybe_unused struct usb_hub_status *hubsts; |
361ad6af | 545 | int ret; |
23faf2bc MV |
546 | |
547 | /* "allocate" Hub device */ | |
548 | hub = usb_hub_allocate(); | |
549 | if (hub == NULL) | |
361ad6af | 550 | return -ENOMEM; |
23faf2bc MV |
551 | hub->pusb_dev = dev; |
552 | /* Get the the hub descriptor */ | |
361ad6af SG |
553 | ret = usb_get_hub_descriptor(dev, buffer, 4); |
554 | if (ret < 0) { | |
ceb4972a VG |
555 | debug("usb_hub_configure: failed to get hub " \ |
556 | "descriptor, giving up %lX\n", dev->status); | |
361ad6af | 557 | return ret; |
23faf2bc MV |
558 | } |
559 | descriptor = (struct usb_hub_descriptor *)buffer; | |
560 | ||
b4141195 MY |
561 | length = min_t(int, descriptor->bLength, |
562 | sizeof(struct usb_hub_descriptor)); | |
23faf2bc | 563 | |
361ad6af SG |
564 | ret = usb_get_hub_descriptor(dev, buffer, length); |
565 | if (ret < 0) { | |
ceb4972a VG |
566 | debug("usb_hub_configure: failed to get hub " \ |
567 | "descriptor 2nd giving up %lX\n", dev->status); | |
361ad6af | 568 | return ret; |
23faf2bc | 569 | } |
eaf3e613 | 570 | memcpy((unsigned char *)&hub->desc, buffer, length); |
23faf2bc | 571 | /* adjust 16bit values */ |
93ad908c LS |
572 | put_unaligned(le16_to_cpu(get_unaligned( |
573 | &descriptor->wHubCharacteristics)), | |
574 | &hub->desc.wHubCharacteristics); | |
23faf2bc MV |
575 | /* set the bitmap */ |
576 | bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0]; | |
577 | /* devices not removable by default */ | |
578 | memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); | |
579 | bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0]; | |
580 | memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */ | |
581 | ||
582 | for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++) | |
583 | hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i]; | |
584 | ||
585 | for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++) | |
586 | hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i]; | |
587 | ||
588 | dev->maxchild = descriptor->bNbrPorts; | |
ceb4972a | 589 | debug("%d ports detected\n", dev->maxchild); |
23faf2bc | 590 | |
93ad908c LS |
591 | hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics); |
592 | switch (hubCharacteristics & HUB_CHAR_LPSM) { | |
23faf2bc | 593 | case 0x00: |
ceb4972a | 594 | debug("ganged power switching\n"); |
23faf2bc MV |
595 | break; |
596 | case 0x01: | |
ceb4972a | 597 | debug("individual port power switching\n"); |
23faf2bc MV |
598 | break; |
599 | case 0x02: | |
600 | case 0x03: | |
ceb4972a | 601 | debug("unknown reserved power switching mode\n"); |
23faf2bc MV |
602 | break; |
603 | } | |
604 | ||
93ad908c | 605 | if (hubCharacteristics & HUB_CHAR_COMPOUND) |
ceb4972a | 606 | debug("part of a compound device\n"); |
23faf2bc | 607 | else |
ceb4972a | 608 | debug("standalone hub\n"); |
23faf2bc | 609 | |
93ad908c | 610 | switch (hubCharacteristics & HUB_CHAR_OCPM) { |
23faf2bc | 611 | case 0x00: |
ceb4972a | 612 | debug("global over-current protection\n"); |
23faf2bc MV |
613 | break; |
614 | case 0x08: | |
ceb4972a | 615 | debug("individual port over-current protection\n"); |
23faf2bc MV |
616 | break; |
617 | case 0x10: | |
618 | case 0x18: | |
ceb4972a | 619 | debug("no over-current protection\n"); |
23faf2bc MV |
620 | break; |
621 | } | |
622 | ||
ceb4972a VG |
623 | debug("power on to power good time: %dms\n", |
624 | descriptor->bPwrOn2PwrGood * 2); | |
625 | debug("hub controller current requirement: %dmA\n", | |
626 | descriptor->bHubContrCurrent); | |
23faf2bc MV |
627 | |
628 | for (i = 0; i < dev->maxchild; i++) | |
ceb4972a VG |
629 | debug("port %d is%s removable\n", i + 1, |
630 | hub->desc.DeviceRemovable[(i + 1) / 8] & \ | |
631 | (1 << ((i + 1) % 8)) ? " not" : ""); | |
23faf2bc MV |
632 | |
633 | if (sizeof(struct usb_hub_status) > USB_BUFSIZ) { | |
ceb4972a VG |
634 | debug("usb_hub_configure: failed to get Status - " \ |
635 | "too long: %d\n", descriptor->bLength); | |
361ad6af | 636 | return -EFBIG; |
23faf2bc MV |
637 | } |
638 | ||
361ad6af SG |
639 | ret = usb_get_hub_status(dev, buffer); |
640 | if (ret < 0) { | |
ceb4972a VG |
641 | debug("usb_hub_configure: failed to get Status %lX\n", |
642 | dev->status); | |
361ad6af | 643 | return ret; |
23faf2bc MV |
644 | } |
645 | ||
ceb4972a | 646 | #ifdef DEBUG |
23faf2bc MV |
647 | hubsts = (struct usb_hub_status *)buffer; |
648 | #endif | |
ceb4972a VG |
649 | |
650 | debug("get_hub_status returned status %X, change %X\n", | |
651 | le16_to_cpu(hubsts->wHubStatus), | |
652 | le16_to_cpu(hubsts->wHubChange)); | |
653 | debug("local power source is %s\n", | |
654 | (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \ | |
655 | "lost (inactive)" : "good"); | |
656 | debug("%sover-current condition exists\n", | |
657 | (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \ | |
658 | "" : "no "); | |
23faf2bc MV |
659 | usb_hub_power_on(hub); |
660 | ||
3615a996 DM |
661 | /* |
662 | * Reset any devices that may be in a bad state when applying | |
663 | * the power. This is a __weak function. Resetting of the devices | |
664 | * should occur in the board file of the device. | |
665 | */ | |
666 | for (i = 0; i < dev->maxchild; i++) | |
667 | usb_hub_reset_devices(i + 1); | |
668 | ||
c998da0d SR |
669 | /* |
670 | * Only add the connected USB devices, including potential hubs, | |
671 | * to a scanning list. This list will get scanned and devices that | |
672 | * are detected (either via port connected or via port timeout) | |
673 | * will get removed from this list. Scanning of the devices on this | |
674 | * list will continue until all devices are removed. | |
675 | */ | |
23faf2bc | 676 | for (i = 0; i < dev->maxchild; i++) { |
c998da0d | 677 | struct usb_device_scan *usb_scan; |
b6d7852c | 678 | |
c998da0d SR |
679 | usb_scan = calloc(1, sizeof(*usb_scan)); |
680 | if (!usb_scan) { | |
681 | printf("Can't allocate memory for USB device!\n"); | |
682 | return -ENOMEM; | |
23faf2bc | 683 | } |
c998da0d SR |
684 | usb_scan->dev = dev; |
685 | usb_scan->hub = hub; | |
686 | usb_scan->port = i; | |
687 | list_add_tail(&usb_scan->list, &usb_scan_list); | |
688 | } | |
23faf2bc | 689 | |
c998da0d SR |
690 | /* |
691 | * And now call the scanning code which loops over the generated list | |
692 | */ | |
693 | ret = usb_device_list_scan(); | |
23faf2bc | 694 | |
c998da0d | 695 | return ret; |
23faf2bc MV |
696 | } |
697 | ||
361ad6af | 698 | static int usb_hub_check(struct usb_device *dev, int ifnum) |
23faf2bc MV |
699 | { |
700 | struct usb_interface *iface; | |
361ad6af | 701 | struct usb_endpoint_descriptor *ep = NULL; |
23faf2bc MV |
702 | |
703 | iface = &dev->config.if_desc[ifnum]; | |
704 | /* Is it a hub? */ | |
705 | if (iface->desc.bInterfaceClass != USB_CLASS_HUB) | |
361ad6af | 706 | goto err; |
23faf2bc MV |
707 | /* Some hubs have a subclass of 1, which AFAICT according to the */ |
708 | /* specs is not defined, but it works */ | |
709 | if ((iface->desc.bInterfaceSubClass != 0) && | |
710 | (iface->desc.bInterfaceSubClass != 1)) | |
361ad6af | 711 | goto err; |
23faf2bc MV |
712 | /* Multiple endpoints? What kind of mutant ninja-hub is this? */ |
713 | if (iface->desc.bNumEndpoints != 1) | |
361ad6af | 714 | goto err; |
23faf2bc MV |
715 | ep = &iface->ep_desc[0]; |
716 | /* Output endpoint? Curiousier and curiousier.. */ | |
717 | if (!(ep->bEndpointAddress & USB_DIR_IN)) | |
361ad6af | 718 | goto err; |
23faf2bc MV |
719 | /* If it's not an interrupt endpoint, we'd better punt! */ |
720 | if ((ep->bmAttributes & 3) != 3) | |
361ad6af | 721 | goto err; |
23faf2bc | 722 | /* We found a hub */ |
ceb4972a | 723 | debug("USB hub found\n"); |
361ad6af SG |
724 | return 0; |
725 | ||
726 | err: | |
727 | debug("USB hub not found: bInterfaceClass=%d, bInterfaceSubClass=%d, bNumEndpoints=%d\n", | |
728 | iface->desc.bInterfaceClass, iface->desc.bInterfaceSubClass, | |
729 | iface->desc.bNumEndpoints); | |
730 | if (ep) { | |
731 | debug(" bEndpointAddress=%#x, bmAttributes=%d", | |
732 | ep->bEndpointAddress, ep->bmAttributes); | |
733 | } | |
734 | ||
735 | return -ENOENT; | |
736 | } | |
737 | ||
738 | int usb_hub_probe(struct usb_device *dev, int ifnum) | |
739 | { | |
740 | int ret; | |
741 | ||
742 | ret = usb_hub_check(dev, ifnum); | |
743 | if (ret) | |
744 | return 0; | |
23faf2bc MV |
745 | ret = usb_hub_configure(dev); |
746 | return ret; | |
747 | } | |
054fe48e SG |
748 | |
749 | #ifdef CONFIG_DM_USB | |
750 | int usb_hub_scan(struct udevice *hub) | |
751 | { | |
bcbe3d15 | 752 | struct usb_device *udev = dev_get_parent_priv(hub); |
054fe48e SG |
753 | |
754 | return usb_hub_configure(udev); | |
755 | } | |
756 | ||
054fe48e SG |
757 | static int usb_hub_post_probe(struct udevice *dev) |
758 | { | |
759 | debug("%s\n", __func__); | |
760 | return usb_hub_scan(dev); | |
761 | } | |
762 | ||
763 | static const struct udevice_id usb_hub_ids[] = { | |
764 | { .compatible = "usb-hub" }, | |
765 | { } | |
766 | }; | |
767 | ||
768 | U_BOOT_DRIVER(usb_generic_hub) = { | |
769 | .name = "usb_hub", | |
770 | .id = UCLASS_USB_HUB, | |
771 | .of_match = usb_hub_ids, | |
772 | .flags = DM_FLAG_ALLOC_PRIV_DMA, | |
773 | }; | |
774 | ||
775 | UCLASS_DRIVER(usb_hub) = { | |
776 | .id = UCLASS_USB_HUB, | |
777 | .name = "usb_hub", | |
91195485 | 778 | .post_bind = dm_scan_fdt_dev, |
054fe48e SG |
779 | .post_probe = usb_hub_post_probe, |
780 | .child_pre_probe = usb_child_pre_probe, | |
781 | .per_child_auto_alloc_size = sizeof(struct usb_device), | |
782 | .per_child_platdata_auto_alloc_size = sizeof(struct usb_dev_platdata), | |
783 | }; | |
784 | ||
785 | static const struct usb_device_id hub_id_table[] = { | |
786 | { | |
787 | .match_flags = USB_DEVICE_ID_MATCH_DEV_CLASS, | |
788 | .bDeviceClass = USB_CLASS_HUB | |
789 | }, | |
790 | { } /* Terminating entry */ | |
791 | }; | |
792 | ||
abb59cff | 793 | U_BOOT_USB_DEVICE(usb_generic_hub, hub_id_table); |
054fe48e SG |
794 | |
795 | #endif |