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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> |
23faf2bc | 29 | #include <asm/processor.h> |
93ad908c | 30 | #include <asm/unaligned.h> |
23faf2bc MV |
31 | #include <linux/ctype.h> |
32 | #include <asm/byteorder.h> | |
33 | #include <asm/unaligned.h> | |
054fe48e SG |
34 | #include <dm/root.h> |
35 | ||
36 | DECLARE_GLOBAL_DATA_PTR; | |
23faf2bc MV |
37 | |
38 | #include <usb.h> | |
39 | #ifdef CONFIG_4xx | |
40 | #include <asm/4xx_pci.h> | |
41 | #endif | |
42 | ||
23faf2bc MV |
43 | #define USB_BUFSIZ 512 |
44 | ||
054fe48e | 45 | /* TODO(sjg@chromium.org): Remove this when CONFIG_DM_USB is defined */ |
23faf2bc MV |
46 | static struct usb_hub_device hub_dev[USB_MAX_HUB]; |
47 | static int usb_hub_index; | |
48 | ||
3615a996 DM |
49 | __weak void usb_hub_reset_devices(int port) |
50 | { | |
51 | return; | |
52 | } | |
23faf2bc MV |
53 | |
54 | static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size) | |
55 | { | |
56 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
57 | USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB, | |
58 | USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT); | |
59 | } | |
60 | ||
61 | static int usb_clear_port_feature(struct usb_device *dev, int port, int feature) | |
62 | { | |
63 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
64 | USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature, | |
65 | port, NULL, 0, USB_CNTL_TIMEOUT); | |
66 | } | |
67 | ||
68 | static int usb_set_port_feature(struct usb_device *dev, int port, int feature) | |
69 | { | |
70 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
71 | USB_REQ_SET_FEATURE, USB_RT_PORT, feature, | |
72 | port, NULL, 0, USB_CNTL_TIMEOUT); | |
73 | } | |
74 | ||
75 | static int usb_get_hub_status(struct usb_device *dev, void *data) | |
76 | { | |
77 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
78 | USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0, | |
79 | data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT); | |
80 | } | |
81 | ||
08f3bb0b | 82 | int usb_get_port_status(struct usb_device *dev, int port, void *data) |
23faf2bc MV |
83 | { |
84 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
85 | USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port, | |
86 | data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT); | |
87 | } | |
88 | ||
89 | ||
90 | static void usb_hub_power_on(struct usb_hub_device *hub) | |
91 | { | |
92 | int i; | |
93 | struct usb_device *dev; | |
a1a28c6e | 94 | unsigned pgood_delay = hub->desc.bPwrOn2PwrGood * 2; |
319418c0 | 95 | const char *env; |
23faf2bc MV |
96 | |
97 | dev = hub->pusb_dev; | |
0bf796f7 | 98 | |
ceb4972a | 99 | debug("enabling power on all ports\n"); |
0bf796f7 | 100 | for (i = 0; i < dev->maxchild; i++) { |
23faf2bc | 101 | usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER); |
ceb4972a | 102 | debug("port %d returns %lX\n", i + 1, dev->status); |
23faf2bc | 103 | } |
a1a28c6e | 104 | |
0d437bca SW |
105 | /* |
106 | * Wait for power to become stable, | |
107 | * plus spec-defined max time for device to connect | |
319418c0 TH |
108 | * but allow this time to be increased via env variable as some |
109 | * devices break the spec and require longer warm-up times | |
0d437bca | 110 | */ |
319418c0 TH |
111 | env = getenv("usb_pgood_delay"); |
112 | if (env) | |
113 | pgood_delay = max(pgood_delay, | |
114 | (unsigned)simple_strtol(env, NULL, 0)); | |
115 | debug("pgood_delay=%dms\n", pgood_delay); | |
77b83e6d | 116 | mdelay(pgood_delay + 1000); |
23faf2bc MV |
117 | } |
118 | ||
119 | void usb_hub_reset(void) | |
120 | { | |
121 | usb_hub_index = 0; | |
122 | } | |
123 | ||
124 | static struct usb_hub_device *usb_hub_allocate(void) | |
125 | { | |
126 | if (usb_hub_index < USB_MAX_HUB) | |
127 | return &hub_dev[usb_hub_index++]; | |
128 | ||
129 | printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB); | |
130 | return NULL; | |
131 | } | |
132 | ||
133 | #define MAX_TRIES 5 | |
134 | ||
135 | static inline char *portspeed(int portstatus) | |
136 | { | |
55f4b575 VG |
137 | char *speed_str; |
138 | ||
139 | switch (portstatus & USB_PORT_STAT_SPEED_MASK) { | |
140 | case USB_PORT_STAT_SUPER_SPEED: | |
141 | speed_str = "5 Gb/s"; | |
142 | break; | |
143 | case USB_PORT_STAT_HIGH_SPEED: | |
144 | speed_str = "480 Mb/s"; | |
145 | break; | |
146 | case USB_PORT_STAT_LOW_SPEED: | |
147 | speed_str = "1.5 Mb/s"; | |
148 | break; | |
149 | default: | |
150 | speed_str = "12 Mb/s"; | |
151 | break; | |
152 | } | |
153 | ||
154 | return speed_str; | |
23faf2bc MV |
155 | } |
156 | ||
862e75c0 | 157 | int legacy_hub_port_reset(struct usb_device *dev, int port, |
23faf2bc MV |
158 | unsigned short *portstat) |
159 | { | |
ad84a42f | 160 | int err, tries; |
f5766139 | 161 | ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1); |
23faf2bc MV |
162 | unsigned short portstatus, portchange; |
163 | ||
054fe48e SG |
164 | #ifdef CONFIG_DM_USB |
165 | debug("%s: resetting '%s' port %d...\n", __func__, dev->dev->name, | |
166 | port + 1); | |
167 | #else | |
168 | debug("%s: resetting port %d...\n", __func__, port + 1); | |
169 | #endif | |
23faf2bc | 170 | for (tries = 0; tries < MAX_TRIES; tries++) { |
ad84a42f HG |
171 | err = usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET); |
172 | if (err < 0) | |
173 | return err; | |
23faf2bc | 174 | |
5b84dd67 | 175 | mdelay(200); |
23faf2bc | 176 | |
f5766139 | 177 | if (usb_get_port_status(dev, port + 1, portsts) < 0) { |
ceb4972a VG |
178 | debug("get_port_status failed status %lX\n", |
179 | dev->status); | |
23faf2bc MV |
180 | return -1; |
181 | } | |
f5766139 PS |
182 | portstatus = le16_to_cpu(portsts->wPortStatus); |
183 | portchange = le16_to_cpu(portsts->wPortChange); | |
23faf2bc | 184 | |
ceb4972a VG |
185 | debug("portstatus %x, change %x, %s\n", portstatus, portchange, |
186 | portspeed(portstatus)); | |
23faf2bc | 187 | |
ceb4972a VG |
188 | debug("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \ |
189 | " USB_PORT_STAT_ENABLE %d\n", | |
190 | (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0, | |
191 | (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0, | |
192 | (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0); | |
23faf2bc | 193 | |
74c0d756 SW |
194 | /* |
195 | * Perhaps we should check for the following here: | |
196 | * - C_CONNECTION hasn't been set. | |
197 | * - CONNECTION is still set. | |
198 | * | |
199 | * Doing so would ensure that the device is still connected | |
200 | * to the bus, and hasn't been unplugged or replaced while the | |
201 | * USB bus reset was going on. | |
202 | * | |
203 | * However, if we do that, then (at least) a San Disk Ultra | |
204 | * USB 3.0 16GB device fails to reset on (at least) an NVIDIA | |
205 | * Tegra Jetson TK1 board. For some reason, the device appears | |
206 | * to briefly drop off the bus when this second bus reset is | |
207 | * executed, yet if we retry this loop, it'll eventually come | |
208 | * back after another reset or two. | |
209 | */ | |
23faf2bc MV |
210 | |
211 | if (portstatus & USB_PORT_STAT_ENABLE) | |
212 | break; | |
213 | ||
5b84dd67 | 214 | mdelay(200); |
23faf2bc MV |
215 | } |
216 | ||
217 | if (tries == MAX_TRIES) { | |
ceb4972a VG |
218 | debug("Cannot enable port %i after %i retries, " \ |
219 | "disabling port.\n", port + 1, MAX_TRIES); | |
220 | debug("Maybe the USB cable is bad?\n"); | |
23faf2bc MV |
221 | return -1; |
222 | } | |
223 | ||
224 | usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET); | |
225 | *portstat = portstatus; | |
226 | return 0; | |
227 | } | |
228 | ||
054fe48e SG |
229 | #ifdef CONFIG_DM_USB |
230 | int hub_port_reset(struct udevice *dev, int port, unsigned short *portstat) | |
231 | { | |
232 | struct usb_device *udev = dev_get_parentdata(dev); | |
233 | ||
234 | return legacy_hub_port_reset(udev, port, portstat); | |
235 | } | |
236 | #endif | |
23faf2bc | 237 | |
79b58887 | 238 | int usb_hub_port_connect_change(struct usb_device *dev, int port) |
23faf2bc | 239 | { |
f5766139 | 240 | ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1); |
23faf2bc | 241 | unsigned short portstatus; |
79b58887 | 242 | int ret, speed; |
23faf2bc MV |
243 | |
244 | /* Check status */ | |
79b58887 SG |
245 | ret = usb_get_port_status(dev, port + 1, portsts); |
246 | if (ret < 0) { | |
ceb4972a | 247 | debug("get_port_status failed\n"); |
79b58887 | 248 | return ret; |
23faf2bc MV |
249 | } |
250 | ||
f5766139 | 251 | portstatus = le16_to_cpu(portsts->wPortStatus); |
ceb4972a VG |
252 | debug("portstatus %x, change %x, %s\n", |
253 | portstatus, | |
254 | le16_to_cpu(portsts->wPortChange), | |
255 | portspeed(portstatus)); | |
23faf2bc MV |
256 | |
257 | /* Clear the connection change status */ | |
258 | usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION); | |
259 | ||
260 | /* Disconnect any existing devices under this port */ | |
261 | if (((!(portstatus & USB_PORT_STAT_CONNECTION)) && | |
054fe48e SG |
262 | (!(portstatus & USB_PORT_STAT_ENABLE))) || |
263 | usb_device_has_child_on_port(dev, port)) { | |
ceb4972a | 264 | debug("usb_disconnect(&hub->children[port]);\n"); |
23faf2bc MV |
265 | /* Return now if nothing is connected */ |
266 | if (!(portstatus & USB_PORT_STAT_CONNECTION)) | |
79b58887 | 267 | return -ENOTCONN; |
23faf2bc | 268 | } |
5b84dd67 | 269 | mdelay(200); |
23faf2bc MV |
270 | |
271 | /* Reset the port */ | |
862e75c0 | 272 | ret = legacy_hub_port_reset(dev, port, &portstatus); |
79b58887 | 273 | if (ret < 0) { |
45b9ea1d HG |
274 | if (ret != -ENXIO) |
275 | printf("cannot reset port %i!?\n", port + 1); | |
79b58887 | 276 | return ret; |
23faf2bc MV |
277 | } |
278 | ||
5b84dd67 | 279 | mdelay(200); |
23faf2bc | 280 | |
55f4b575 VG |
281 | switch (portstatus & USB_PORT_STAT_SPEED_MASK) { |
282 | case USB_PORT_STAT_SUPER_SPEED: | |
79b58887 | 283 | speed = USB_SPEED_SUPER; |
55f4b575 VG |
284 | break; |
285 | case USB_PORT_STAT_HIGH_SPEED: | |
79b58887 | 286 | speed = USB_SPEED_HIGH; |
55f4b575 VG |
287 | break; |
288 | case USB_PORT_STAT_LOW_SPEED: | |
79b58887 | 289 | speed = USB_SPEED_LOW; |
55f4b575 VG |
290 | break; |
291 | default: | |
79b58887 | 292 | speed = USB_SPEED_FULL; |
55f4b575 VG |
293 | break; |
294 | } | |
23faf2bc | 295 | |
054fe48e SG |
296 | #ifdef CONFIG_DM_USB |
297 | struct udevice *child; | |
298 | ||
299 | ret = usb_scan_device(dev->dev, port + 1, speed, &child); | |
300 | #else | |
301 | struct usb_device *usb; | |
302 | ||
79b58887 SG |
303 | ret = usb_alloc_new_device(dev->controller, &usb); |
304 | if (ret) { | |
305 | printf("cannot create new device: ret=%d", ret); | |
306 | return ret; | |
307 | } | |
308 | ||
23faf2bc | 309 | dev->children[port] = usb; |
79b58887 | 310 | usb->speed = speed; |
23faf2bc MV |
311 | usb->parent = dev; |
312 | usb->portnr = port + 1; | |
313 | /* Run it through the hoops (find a driver, etc) */ | |
79b58887 SG |
314 | ret = usb_new_device(usb); |
315 | if (ret < 0) { | |
23faf2bc | 316 | /* Woops, disable the port */ |
79b58887 | 317 | usb_free_device(dev->controller); |
359439d2 | 318 | dev->children[port] = NULL; |
054fe48e SG |
319 | } |
320 | #endif | |
321 | if (ret < 0) { | |
ceb4972a | 322 | debug("hub: disabling port %d\n", port + 1); |
23faf2bc MV |
323 | usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE); |
324 | } | |
79b58887 SG |
325 | |
326 | return ret; | |
23faf2bc MV |
327 | } |
328 | ||
329 | ||
330 | static int usb_hub_configure(struct usb_device *dev) | |
331 | { | |
eaf3e613 | 332 | int i, length; |
f5766139 PS |
333 | ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ); |
334 | unsigned char *bitmap; | |
93ad908c | 335 | short hubCharacteristics; |
23faf2bc MV |
336 | struct usb_hub_descriptor *descriptor; |
337 | struct usb_hub_device *hub; | |
ceb4972a | 338 | __maybe_unused struct usb_hub_status *hubsts; |
361ad6af | 339 | int ret; |
23faf2bc MV |
340 | |
341 | /* "allocate" Hub device */ | |
342 | hub = usb_hub_allocate(); | |
343 | if (hub == NULL) | |
361ad6af | 344 | return -ENOMEM; |
23faf2bc MV |
345 | hub->pusb_dev = dev; |
346 | /* Get the the hub descriptor */ | |
361ad6af SG |
347 | ret = usb_get_hub_descriptor(dev, buffer, 4); |
348 | if (ret < 0) { | |
ceb4972a VG |
349 | debug("usb_hub_configure: failed to get hub " \ |
350 | "descriptor, giving up %lX\n", dev->status); | |
361ad6af | 351 | return ret; |
23faf2bc MV |
352 | } |
353 | descriptor = (struct usb_hub_descriptor *)buffer; | |
354 | ||
b4141195 MY |
355 | length = min_t(int, descriptor->bLength, |
356 | sizeof(struct usb_hub_descriptor)); | |
23faf2bc | 357 | |
361ad6af SG |
358 | ret = usb_get_hub_descriptor(dev, buffer, length); |
359 | if (ret < 0) { | |
ceb4972a VG |
360 | debug("usb_hub_configure: failed to get hub " \ |
361 | "descriptor 2nd giving up %lX\n", dev->status); | |
361ad6af | 362 | return ret; |
23faf2bc | 363 | } |
eaf3e613 | 364 | memcpy((unsigned char *)&hub->desc, buffer, length); |
23faf2bc | 365 | /* adjust 16bit values */ |
93ad908c LS |
366 | put_unaligned(le16_to_cpu(get_unaligned( |
367 | &descriptor->wHubCharacteristics)), | |
368 | &hub->desc.wHubCharacteristics); | |
23faf2bc MV |
369 | /* set the bitmap */ |
370 | bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0]; | |
371 | /* devices not removable by default */ | |
372 | memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); | |
373 | bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0]; | |
374 | memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */ | |
375 | ||
376 | for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++) | |
377 | hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i]; | |
378 | ||
379 | for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++) | |
380 | hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i]; | |
381 | ||
382 | dev->maxchild = descriptor->bNbrPorts; | |
ceb4972a | 383 | debug("%d ports detected\n", dev->maxchild); |
23faf2bc | 384 | |
93ad908c LS |
385 | hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics); |
386 | switch (hubCharacteristics & HUB_CHAR_LPSM) { | |
23faf2bc | 387 | case 0x00: |
ceb4972a | 388 | debug("ganged power switching\n"); |
23faf2bc MV |
389 | break; |
390 | case 0x01: | |
ceb4972a | 391 | debug("individual port power switching\n"); |
23faf2bc MV |
392 | break; |
393 | case 0x02: | |
394 | case 0x03: | |
ceb4972a | 395 | debug("unknown reserved power switching mode\n"); |
23faf2bc MV |
396 | break; |
397 | } | |
398 | ||
93ad908c | 399 | if (hubCharacteristics & HUB_CHAR_COMPOUND) |
ceb4972a | 400 | debug("part of a compound device\n"); |
23faf2bc | 401 | else |
ceb4972a | 402 | debug("standalone hub\n"); |
23faf2bc | 403 | |
93ad908c | 404 | switch (hubCharacteristics & HUB_CHAR_OCPM) { |
23faf2bc | 405 | case 0x00: |
ceb4972a | 406 | debug("global over-current protection\n"); |
23faf2bc MV |
407 | break; |
408 | case 0x08: | |
ceb4972a | 409 | debug("individual port over-current protection\n"); |
23faf2bc MV |
410 | break; |
411 | case 0x10: | |
412 | case 0x18: | |
ceb4972a | 413 | debug("no over-current protection\n"); |
23faf2bc MV |
414 | break; |
415 | } | |
416 | ||
ceb4972a VG |
417 | debug("power on to power good time: %dms\n", |
418 | descriptor->bPwrOn2PwrGood * 2); | |
419 | debug("hub controller current requirement: %dmA\n", | |
420 | descriptor->bHubContrCurrent); | |
23faf2bc MV |
421 | |
422 | for (i = 0; i < dev->maxchild; i++) | |
ceb4972a VG |
423 | debug("port %d is%s removable\n", i + 1, |
424 | hub->desc.DeviceRemovable[(i + 1) / 8] & \ | |
425 | (1 << ((i + 1) % 8)) ? " not" : ""); | |
23faf2bc MV |
426 | |
427 | if (sizeof(struct usb_hub_status) > USB_BUFSIZ) { | |
ceb4972a VG |
428 | debug("usb_hub_configure: failed to get Status - " \ |
429 | "too long: %d\n", descriptor->bLength); | |
361ad6af | 430 | return -EFBIG; |
23faf2bc MV |
431 | } |
432 | ||
361ad6af SG |
433 | ret = usb_get_hub_status(dev, buffer); |
434 | if (ret < 0) { | |
ceb4972a VG |
435 | debug("usb_hub_configure: failed to get Status %lX\n", |
436 | dev->status); | |
361ad6af | 437 | return ret; |
23faf2bc MV |
438 | } |
439 | ||
ceb4972a | 440 | #ifdef DEBUG |
23faf2bc MV |
441 | hubsts = (struct usb_hub_status *)buffer; |
442 | #endif | |
ceb4972a VG |
443 | |
444 | debug("get_hub_status returned status %X, change %X\n", | |
445 | le16_to_cpu(hubsts->wHubStatus), | |
446 | le16_to_cpu(hubsts->wHubChange)); | |
447 | debug("local power source is %s\n", | |
448 | (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \ | |
449 | "lost (inactive)" : "good"); | |
450 | debug("%sover-current condition exists\n", | |
451 | (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \ | |
452 | "" : "no "); | |
23faf2bc MV |
453 | usb_hub_power_on(hub); |
454 | ||
3615a996 DM |
455 | /* |
456 | * Reset any devices that may be in a bad state when applying | |
457 | * the power. This is a __weak function. Resetting of the devices | |
458 | * should occur in the board file of the device. | |
459 | */ | |
460 | for (i = 0; i < dev->maxchild; i++) | |
461 | usb_hub_reset_devices(i + 1); | |
462 | ||
23faf2bc | 463 | for (i = 0; i < dev->maxchild; i++) { |
f5766139 | 464 | ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1); |
23faf2bc | 465 | unsigned short portstatus, portchange; |
b6d7852c VK |
466 | int ret; |
467 | ulong start = get_timer(0); | |
468 | ||
054fe48e SG |
469 | #ifdef CONFIG_DM_USB |
470 | debug("\n\nScanning '%s' port %d\n", dev->dev->name, i + 1); | |
471 | #else | |
361ad6af | 472 | debug("\n\nScanning port %d\n", i + 1); |
054fe48e | 473 | #endif |
b6d7852c VK |
474 | /* |
475 | * Wait for (whichever finishes first) | |
476 | * - A maximum of 10 seconds | |
477 | * This is a purely observational value driven by connecting | |
478 | * a few broken pen drives and taking the max * 1.5 approach | |
479 | * - connection_change and connection state to report same | |
480 | * state | |
481 | */ | |
482 | do { | |
483 | ret = usb_get_port_status(dev, i + 1, portsts); | |
484 | if (ret < 0) { | |
ceb4972a | 485 | debug("get_port_status failed\n"); |
b6d7852c VK |
486 | break; |
487 | } | |
488 | ||
489 | portstatus = le16_to_cpu(portsts->wPortStatus); | |
490 | portchange = le16_to_cpu(portsts->wPortChange); | |
491 | ||
dcc7dbc7 MV |
492 | /* No connection change happened, wait a bit more. */ |
493 | if (!(portchange & USB_PORT_STAT_C_CONNECTION)) | |
494 | continue; | |
495 | ||
496 | /* Test if the connection came up, and if so, exit. */ | |
497 | if (portstatus & USB_PORT_STAT_CONNECTION) | |
b6d7852c VK |
498 | break; |
499 | ||
dcc7dbc7 | 500 | } while (get_timer(start) < CONFIG_SYS_HZ * 1); |
b6d7852c VK |
501 | |
502 | if (ret < 0) | |
23faf2bc | 503 | continue; |
23faf2bc | 504 | |
ceb4972a VG |
505 | debug("Port %d Status %X Change %X\n", |
506 | i + 1, portstatus, portchange); | |
23faf2bc MV |
507 | |
508 | if (portchange & USB_PORT_STAT_C_CONNECTION) { | |
ceb4972a | 509 | debug("port %d connection change\n", i + 1); |
23faf2bc MV |
510 | usb_hub_port_connect_change(dev, i); |
511 | } | |
512 | if (portchange & USB_PORT_STAT_C_ENABLE) { | |
ceb4972a VG |
513 | debug("port %d enable change, status %x\n", |
514 | i + 1, portstatus); | |
23faf2bc MV |
515 | usb_clear_port_feature(dev, i + 1, |
516 | USB_PORT_FEAT_C_ENABLE); | |
e82a316d KJS |
517 | /* |
518 | * The following hack causes a ghost device problem | |
519 | * to Faraday EHCI | |
520 | */ | |
521 | #ifndef CONFIG_USB_EHCI_FARADAY | |
23faf2bc MV |
522 | /* EM interference sometimes causes bad shielded USB |
523 | * devices to be shutdown by the hub, this hack enables | |
524 | * them again. Works at least with mouse driver */ | |
525 | if (!(portstatus & USB_PORT_STAT_ENABLE) && | |
526 | (portstatus & USB_PORT_STAT_CONNECTION) && | |
054fe48e | 527 | usb_device_has_child_on_port(dev, i)) { |
ceb4972a VG |
528 | debug("already running port %i " \ |
529 | "disabled by hub (EMI?), " \ | |
530 | "re-enabling...\n", i + 1); | |
531 | usb_hub_port_connect_change(dev, i); | |
23faf2bc | 532 | } |
e82a316d | 533 | #endif |
23faf2bc MV |
534 | } |
535 | if (portstatus & USB_PORT_STAT_SUSPEND) { | |
ceb4972a | 536 | debug("port %d suspend change\n", i + 1); |
23faf2bc MV |
537 | usb_clear_port_feature(dev, i + 1, |
538 | USB_PORT_FEAT_SUSPEND); | |
539 | } | |
540 | ||
541 | if (portchange & USB_PORT_STAT_C_OVERCURRENT) { | |
ceb4972a | 542 | debug("port %d over-current change\n", i + 1); |
23faf2bc MV |
543 | usb_clear_port_feature(dev, i + 1, |
544 | USB_PORT_FEAT_C_OVER_CURRENT); | |
545 | usb_hub_power_on(hub); | |
546 | } | |
547 | ||
548 | if (portchange & USB_PORT_STAT_C_RESET) { | |
ceb4972a | 549 | debug("port %d reset change\n", i + 1); |
23faf2bc MV |
550 | usb_clear_port_feature(dev, i + 1, |
551 | USB_PORT_FEAT_C_RESET); | |
552 | } | |
553 | } /* end for i all ports */ | |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
361ad6af | 558 | static int usb_hub_check(struct usb_device *dev, int ifnum) |
23faf2bc MV |
559 | { |
560 | struct usb_interface *iface; | |
361ad6af | 561 | struct usb_endpoint_descriptor *ep = NULL; |
23faf2bc MV |
562 | |
563 | iface = &dev->config.if_desc[ifnum]; | |
564 | /* Is it a hub? */ | |
565 | if (iface->desc.bInterfaceClass != USB_CLASS_HUB) | |
361ad6af | 566 | goto err; |
23faf2bc MV |
567 | /* Some hubs have a subclass of 1, which AFAICT according to the */ |
568 | /* specs is not defined, but it works */ | |
569 | if ((iface->desc.bInterfaceSubClass != 0) && | |
570 | (iface->desc.bInterfaceSubClass != 1)) | |
361ad6af | 571 | goto err; |
23faf2bc MV |
572 | /* Multiple endpoints? What kind of mutant ninja-hub is this? */ |
573 | if (iface->desc.bNumEndpoints != 1) | |
361ad6af | 574 | goto err; |
23faf2bc MV |
575 | ep = &iface->ep_desc[0]; |
576 | /* Output endpoint? Curiousier and curiousier.. */ | |
577 | if (!(ep->bEndpointAddress & USB_DIR_IN)) | |
361ad6af | 578 | goto err; |
23faf2bc MV |
579 | /* If it's not an interrupt endpoint, we'd better punt! */ |
580 | if ((ep->bmAttributes & 3) != 3) | |
361ad6af | 581 | goto err; |
23faf2bc | 582 | /* We found a hub */ |
ceb4972a | 583 | debug("USB hub found\n"); |
361ad6af SG |
584 | return 0; |
585 | ||
586 | err: | |
587 | debug("USB hub not found: bInterfaceClass=%d, bInterfaceSubClass=%d, bNumEndpoints=%d\n", | |
588 | iface->desc.bInterfaceClass, iface->desc.bInterfaceSubClass, | |
589 | iface->desc.bNumEndpoints); | |
590 | if (ep) { | |
591 | debug(" bEndpointAddress=%#x, bmAttributes=%d", | |
592 | ep->bEndpointAddress, ep->bmAttributes); | |
593 | } | |
594 | ||
595 | return -ENOENT; | |
596 | } | |
597 | ||
598 | int usb_hub_probe(struct usb_device *dev, int ifnum) | |
599 | { | |
600 | int ret; | |
601 | ||
602 | ret = usb_hub_check(dev, ifnum); | |
603 | if (ret) | |
604 | return 0; | |
23faf2bc MV |
605 | ret = usb_hub_configure(dev); |
606 | return ret; | |
607 | } | |
054fe48e SG |
608 | |
609 | #ifdef CONFIG_DM_USB | |
610 | int usb_hub_scan(struct udevice *hub) | |
611 | { | |
612 | struct usb_device *udev = dev_get_parentdata(hub); | |
613 | ||
614 | return usb_hub_configure(udev); | |
615 | } | |
616 | ||
617 | static int usb_hub_post_bind(struct udevice *dev) | |
618 | { | |
619 | /* Scan the bus for devices */ | |
620 | return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false); | |
621 | } | |
622 | ||
623 | static int usb_hub_post_probe(struct udevice *dev) | |
624 | { | |
625 | debug("%s\n", __func__); | |
626 | return usb_hub_scan(dev); | |
627 | } | |
628 | ||
629 | static const struct udevice_id usb_hub_ids[] = { | |
630 | { .compatible = "usb-hub" }, | |
631 | { } | |
632 | }; | |
633 | ||
634 | U_BOOT_DRIVER(usb_generic_hub) = { | |
635 | .name = "usb_hub", | |
636 | .id = UCLASS_USB_HUB, | |
637 | .of_match = usb_hub_ids, | |
638 | .flags = DM_FLAG_ALLOC_PRIV_DMA, | |
639 | }; | |
640 | ||
641 | UCLASS_DRIVER(usb_hub) = { | |
642 | .id = UCLASS_USB_HUB, | |
643 | .name = "usb_hub", | |
644 | .post_bind = usb_hub_post_bind, | |
645 | .post_probe = usb_hub_post_probe, | |
646 | .child_pre_probe = usb_child_pre_probe, | |
647 | .per_child_auto_alloc_size = sizeof(struct usb_device), | |
648 | .per_child_platdata_auto_alloc_size = sizeof(struct usb_dev_platdata), | |
649 | }; | |
650 | ||
651 | static const struct usb_device_id hub_id_table[] = { | |
652 | { | |
653 | .match_flags = USB_DEVICE_ID_MATCH_DEV_CLASS, | |
654 | .bDeviceClass = USB_CLASS_HUB | |
655 | }, | |
656 | { } /* Terminating entry */ | |
657 | }; | |
658 | ||
abb59cff | 659 | U_BOOT_USB_DEVICE(usb_generic_hub, hub_id_table); |
054fe48e SG |
660 | |
661 | #endif |