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23faf2bc MV |
1 | /* |
2 | * | |
3 | * Most of this source has been derived from the Linux USB | |
4 | * project: | |
5 | * (C) Copyright Linus Torvalds 1999 | |
6 | * (C) Copyright Johannes Erdfelt 1999-2001 | |
7 | * (C) Copyright Andreas Gal 1999 | |
8 | * (C) Copyright Gregory P. Smith 1999 | |
9 | * (C) Copyright Deti Fliegl 1999 (new USB architecture) | |
10 | * (C) Copyright Randy Dunlap 2000 | |
11 | * (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id) | |
12 | * (C) Copyright Yggdrasil Computing, Inc. 2000 | |
13 | * (usb_device_id matching changes by Adam J. Richter) | |
14 | * | |
15 | * Adapted for U-Boot: | |
16 | * (C) Copyright 2001 Denis Peter, MPL AG Switzerland | |
17 | * | |
18 | * See file CREDITS for list of people who contributed to this | |
19 | * project. | |
20 | * | |
21 | * This program is free software; you can redistribute it and/or | |
22 | * modify it under the terms of the GNU General Public License as | |
23 | * published by the Free Software Foundation; either version 2 of | |
24 | * the License, or (at your option) any later version. | |
25 | * | |
26 | * This program is distributed in the hope that it will be useful, | |
27 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
28 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
29 | * GNU General Public License for more details. | |
30 | * | |
31 | * You should have received a copy of the GNU General Public License | |
32 | * along with this program; if not, write to the Free Software | |
33 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
34 | * MA 02111-1307 USA | |
35 | * | |
36 | */ | |
37 | ||
38 | /**************************************************************************** | |
39 | * HUB "Driver" | |
40 | * Probes device for being a hub and configurate it | |
41 | */ | |
42 | ||
43 | #include <common.h> | |
44 | #include <command.h> | |
45 | #include <asm/processor.h> | |
46 | #include <linux/ctype.h> | |
47 | #include <asm/byteorder.h> | |
48 | #include <asm/unaligned.h> | |
49 | ||
50 | #include <usb.h> | |
51 | #ifdef CONFIG_4xx | |
52 | #include <asm/4xx_pci.h> | |
53 | #endif | |
54 | ||
55 | #ifdef DEBUG | |
56 | #define USB_DEBUG 1 | |
57 | #define USB_HUB_DEBUG 1 | |
58 | #else | |
59 | #define USB_DEBUG 0 | |
60 | #define USB_HUB_DEBUG 0 | |
61 | #endif | |
62 | ||
63 | #define USB_PRINTF(fmt, args...) debug_cond(USB_DEBUG, fmt, ##args) | |
64 | #define USB_HUB_PRINTF(fmt, args...) debug_cond(USB_HUB_DEBUG, fmt, ##args) | |
65 | ||
66 | #define USB_BUFSIZ 512 | |
67 | ||
68 | static struct usb_hub_device hub_dev[USB_MAX_HUB]; | |
69 | static int usb_hub_index; | |
70 | ||
71 | ||
72 | static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size) | |
73 | { | |
74 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
75 | USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB, | |
76 | USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT); | |
77 | } | |
78 | ||
79 | static int usb_clear_port_feature(struct usb_device *dev, int port, int feature) | |
80 | { | |
81 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
82 | USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature, | |
83 | port, NULL, 0, USB_CNTL_TIMEOUT); | |
84 | } | |
85 | ||
86 | static int usb_set_port_feature(struct usb_device *dev, int port, int feature) | |
87 | { | |
88 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
89 | USB_REQ_SET_FEATURE, USB_RT_PORT, feature, | |
90 | port, NULL, 0, USB_CNTL_TIMEOUT); | |
91 | } | |
92 | ||
93 | static int usb_get_hub_status(struct usb_device *dev, void *data) | |
94 | { | |
95 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
96 | USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0, | |
97 | data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT); | |
98 | } | |
99 | ||
100 | static int usb_get_port_status(struct usb_device *dev, int port, void *data) | |
101 | { | |
102 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
103 | USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port, | |
104 | data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT); | |
105 | } | |
106 | ||
107 | ||
108 | static void usb_hub_power_on(struct usb_hub_device *hub) | |
109 | { | |
110 | int i; | |
111 | struct usb_device *dev; | |
a1a28c6e | 112 | unsigned pgood_delay = hub->desc.bPwrOn2PwrGood * 2; |
23faf2bc MV |
113 | |
114 | dev = hub->pusb_dev; | |
115 | /* Enable power to the ports */ | |
116 | USB_HUB_PRINTF("enabling power on all ports\n"); | |
117 | for (i = 0; i < dev->maxchild; i++) { | |
118 | usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER); | |
119 | USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status); | |
23faf2bc | 120 | } |
a1a28c6e WG |
121 | |
122 | /* Wait at least 100 msec for power to become stable */ | |
123 | wait_ms(max(pgood_delay, (unsigned)100)); | |
23faf2bc MV |
124 | } |
125 | ||
126 | void usb_hub_reset(void) | |
127 | { | |
128 | usb_hub_index = 0; | |
129 | } | |
130 | ||
131 | static struct usb_hub_device *usb_hub_allocate(void) | |
132 | { | |
133 | if (usb_hub_index < USB_MAX_HUB) | |
134 | return &hub_dev[usb_hub_index++]; | |
135 | ||
136 | printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB); | |
137 | return NULL; | |
138 | } | |
139 | ||
140 | #define MAX_TRIES 5 | |
141 | ||
142 | static inline char *portspeed(int portstatus) | |
143 | { | |
144 | if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED)) | |
145 | return "480 Mb/s"; | |
146 | else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED)) | |
147 | return "1.5 Mb/s"; | |
148 | else | |
149 | return "12 Mb/s"; | |
150 | } | |
151 | ||
152 | int hub_port_reset(struct usb_device *dev, int port, | |
153 | unsigned short *portstat) | |
154 | { | |
155 | int tries; | |
156 | struct usb_port_status portsts; | |
157 | unsigned short portstatus, portchange; | |
158 | ||
159 | USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port); | |
160 | for (tries = 0; tries < MAX_TRIES; tries++) { | |
161 | ||
162 | usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET); | |
163 | wait_ms(200); | |
164 | ||
165 | if (usb_get_port_status(dev, port + 1, &portsts) < 0) { | |
166 | USB_HUB_PRINTF("get_port_status failed status %lX\n", | |
167 | dev->status); | |
168 | return -1; | |
169 | } | |
170 | portstatus = le16_to_cpu(portsts.wPortStatus); | |
171 | portchange = le16_to_cpu(portsts.wPortChange); | |
172 | ||
173 | USB_HUB_PRINTF("portstatus %x, change %x, %s\n", | |
174 | portstatus, portchange, | |
175 | portspeed(portstatus)); | |
176 | ||
177 | USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \ | |
178 | " USB_PORT_STAT_ENABLE %d\n", | |
179 | (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0, | |
180 | (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0, | |
181 | (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0); | |
182 | ||
183 | if ((portchange & USB_PORT_STAT_C_CONNECTION) || | |
184 | !(portstatus & USB_PORT_STAT_CONNECTION)) | |
185 | return -1; | |
186 | ||
187 | if (portstatus & USB_PORT_STAT_ENABLE) | |
188 | break; | |
189 | ||
190 | wait_ms(200); | |
191 | } | |
192 | ||
193 | if (tries == MAX_TRIES) { | |
194 | USB_HUB_PRINTF("Cannot enable port %i after %i retries, " \ | |
195 | "disabling port.\n", port + 1, MAX_TRIES); | |
196 | USB_HUB_PRINTF("Maybe the USB cable is bad?\n"); | |
197 | return -1; | |
198 | } | |
199 | ||
200 | usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET); | |
201 | *portstat = portstatus; | |
202 | return 0; | |
203 | } | |
204 | ||
205 | ||
206 | void usb_hub_port_connect_change(struct usb_device *dev, int port) | |
207 | { | |
208 | struct usb_device *usb; | |
209 | struct usb_port_status portsts; | |
210 | unsigned short portstatus; | |
211 | ||
212 | /* Check status */ | |
213 | if (usb_get_port_status(dev, port + 1, &portsts) < 0) { | |
214 | USB_HUB_PRINTF("get_port_status failed\n"); | |
215 | return; | |
216 | } | |
217 | ||
218 | portstatus = le16_to_cpu(portsts.wPortStatus); | |
219 | USB_HUB_PRINTF("portstatus %x, change %x, %s\n", | |
220 | portstatus, | |
221 | le16_to_cpu(portsts.wPortChange), | |
222 | portspeed(portstatus)); | |
223 | ||
224 | /* Clear the connection change status */ | |
225 | usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION); | |
226 | ||
227 | /* Disconnect any existing devices under this port */ | |
228 | if (((!(portstatus & USB_PORT_STAT_CONNECTION)) && | |
229 | (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) { | |
230 | USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n"); | |
231 | /* Return now if nothing is connected */ | |
232 | if (!(portstatus & USB_PORT_STAT_CONNECTION)) | |
233 | return; | |
234 | } | |
235 | wait_ms(200); | |
236 | ||
237 | /* Reset the port */ | |
238 | if (hub_port_reset(dev, port, &portstatus) < 0) { | |
239 | printf("cannot reset port %i!?\n", port + 1); | |
240 | return; | |
241 | } | |
242 | ||
243 | wait_ms(200); | |
244 | ||
245 | /* Allocate a new device struct for it */ | |
246 | usb = usb_alloc_new_device(); | |
247 | ||
248 | if (portstatus & USB_PORT_STAT_HIGH_SPEED) | |
249 | usb->speed = USB_SPEED_HIGH; | |
250 | else if (portstatus & USB_PORT_STAT_LOW_SPEED) | |
251 | usb->speed = USB_SPEED_LOW; | |
252 | else | |
253 | usb->speed = USB_SPEED_FULL; | |
254 | ||
255 | dev->children[port] = usb; | |
256 | usb->parent = dev; | |
257 | usb->portnr = port + 1; | |
258 | /* Run it through the hoops (find a driver, etc) */ | |
259 | if (usb_new_device(usb)) { | |
260 | /* Woops, disable the port */ | |
261 | USB_HUB_PRINTF("hub: disabling port %d\n", port + 1); | |
262 | usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE); | |
263 | } | |
264 | } | |
265 | ||
266 | ||
267 | static int usb_hub_configure(struct usb_device *dev) | |
268 | { | |
269 | int i; | |
270 | unsigned char buffer[USB_BUFSIZ], *bitmap; | |
271 | struct usb_hub_descriptor *descriptor; | |
272 | struct usb_hub_device *hub; | |
273 | #ifdef USB_HUB_DEBUG | |
274 | struct usb_hub_status *hubsts; | |
275 | #endif | |
276 | ||
277 | /* "allocate" Hub device */ | |
278 | hub = usb_hub_allocate(); | |
279 | if (hub == NULL) | |
280 | return -1; | |
281 | hub->pusb_dev = dev; | |
282 | /* Get the the hub descriptor */ | |
283 | if (usb_get_hub_descriptor(dev, buffer, 4) < 0) { | |
284 | USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \ | |
285 | "descriptor, giving up %lX\n", dev->status); | |
286 | return -1; | |
287 | } | |
288 | descriptor = (struct usb_hub_descriptor *)buffer; | |
289 | ||
290 | /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */ | |
291 | i = descriptor->bLength; | |
292 | if (i > USB_BUFSIZ) { | |
293 | USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \ | |
294 | "descriptor - too long: %d\n", | |
295 | descriptor->bLength); | |
296 | return -1; | |
297 | } | |
298 | ||
299 | if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) { | |
300 | USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \ | |
301 | "descriptor 2nd giving up %lX\n", dev->status); | |
302 | return -1; | |
303 | } | |
304 | memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength); | |
305 | /* adjust 16bit values */ | |
306 | hub->desc.wHubCharacteristics = | |
307 | le16_to_cpu(descriptor->wHubCharacteristics); | |
308 | /* set the bitmap */ | |
309 | bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0]; | |
310 | /* devices not removable by default */ | |
311 | memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); | |
312 | bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0]; | |
313 | memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */ | |
314 | ||
315 | for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++) | |
316 | hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i]; | |
317 | ||
318 | for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++) | |
319 | hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i]; | |
320 | ||
321 | dev->maxchild = descriptor->bNbrPorts; | |
322 | USB_HUB_PRINTF("%d ports detected\n", dev->maxchild); | |
323 | ||
324 | switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) { | |
325 | case 0x00: | |
326 | USB_HUB_PRINTF("ganged power switching\n"); | |
327 | break; | |
328 | case 0x01: | |
329 | USB_HUB_PRINTF("individual port power switching\n"); | |
330 | break; | |
331 | case 0x02: | |
332 | case 0x03: | |
333 | USB_HUB_PRINTF("unknown reserved power switching mode\n"); | |
334 | break; | |
335 | } | |
336 | ||
337 | if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND) | |
338 | USB_HUB_PRINTF("part of a compound device\n"); | |
339 | else | |
340 | USB_HUB_PRINTF("standalone hub\n"); | |
341 | ||
342 | switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) { | |
343 | case 0x00: | |
344 | USB_HUB_PRINTF("global over-current protection\n"); | |
345 | break; | |
346 | case 0x08: | |
347 | USB_HUB_PRINTF("individual port over-current protection\n"); | |
348 | break; | |
349 | case 0x10: | |
350 | case 0x18: | |
351 | USB_HUB_PRINTF("no over-current protection\n"); | |
352 | break; | |
353 | } | |
354 | ||
355 | USB_HUB_PRINTF("power on to power good time: %dms\n", | |
356 | descriptor->bPwrOn2PwrGood * 2); | |
357 | USB_HUB_PRINTF("hub controller current requirement: %dmA\n", | |
358 | descriptor->bHubContrCurrent); | |
359 | ||
360 | for (i = 0; i < dev->maxchild; i++) | |
361 | USB_HUB_PRINTF("port %d is%s removable\n", i + 1, | |
362 | hub->desc.DeviceRemovable[(i + 1) / 8] & \ | |
363 | (1 << ((i + 1) % 8)) ? " not" : ""); | |
364 | ||
365 | if (sizeof(struct usb_hub_status) > USB_BUFSIZ) { | |
366 | USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \ | |
367 | "too long: %d\n", descriptor->bLength); | |
368 | return -1; | |
369 | } | |
370 | ||
371 | if (usb_get_hub_status(dev, buffer) < 0) { | |
372 | USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n", | |
373 | dev->status); | |
374 | return -1; | |
375 | } | |
376 | ||
377 | #ifdef USB_HUB_DEBUG | |
378 | hubsts = (struct usb_hub_status *)buffer; | |
379 | #endif | |
380 | USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n", | |
381 | le16_to_cpu(hubsts->wHubStatus), | |
382 | le16_to_cpu(hubsts->wHubChange)); | |
383 | USB_HUB_PRINTF("local power source is %s\n", | |
384 | (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \ | |
385 | "lost (inactive)" : "good"); | |
386 | USB_HUB_PRINTF("%sover-current condition exists\n", | |
387 | (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \ | |
388 | "" : "no "); | |
389 | usb_hub_power_on(hub); | |
390 | ||
391 | for (i = 0; i < dev->maxchild; i++) { | |
392 | struct usb_port_status portsts; | |
393 | unsigned short portstatus, portchange; | |
394 | ||
395 | if (usb_get_port_status(dev, i + 1, &portsts) < 0) { | |
396 | USB_HUB_PRINTF("get_port_status failed\n"); | |
397 | continue; | |
398 | } | |
399 | ||
400 | portstatus = le16_to_cpu(portsts.wPortStatus); | |
401 | portchange = le16_to_cpu(portsts.wPortChange); | |
402 | USB_HUB_PRINTF("Port %d Status %X Change %X\n", | |
403 | i + 1, portstatus, portchange); | |
404 | ||
405 | if (portchange & USB_PORT_STAT_C_CONNECTION) { | |
406 | USB_HUB_PRINTF("port %d connection change\n", i + 1); | |
407 | usb_hub_port_connect_change(dev, i); | |
408 | } | |
409 | if (portchange & USB_PORT_STAT_C_ENABLE) { | |
410 | USB_HUB_PRINTF("port %d enable change, status %x\n", | |
411 | i + 1, portstatus); | |
412 | usb_clear_port_feature(dev, i + 1, | |
413 | USB_PORT_FEAT_C_ENABLE); | |
414 | ||
415 | /* EM interference sometimes causes bad shielded USB | |
416 | * devices to be shutdown by the hub, this hack enables | |
417 | * them again. Works at least with mouse driver */ | |
418 | if (!(portstatus & USB_PORT_STAT_ENABLE) && | |
419 | (portstatus & USB_PORT_STAT_CONNECTION) && | |
420 | ((dev->children[i]))) { | |
421 | USB_HUB_PRINTF("already running port %i " \ | |
422 | "disabled by hub (EMI?), " \ | |
423 | "re-enabling...\n", i + 1); | |
424 | usb_hub_port_connect_change(dev, i); | |
425 | } | |
426 | } | |
427 | if (portstatus & USB_PORT_STAT_SUSPEND) { | |
428 | USB_HUB_PRINTF("port %d suspend change\n", i + 1); | |
429 | usb_clear_port_feature(dev, i + 1, | |
430 | USB_PORT_FEAT_SUSPEND); | |
431 | } | |
432 | ||
433 | if (portchange & USB_PORT_STAT_C_OVERCURRENT) { | |
434 | USB_HUB_PRINTF("port %d over-current change\n", i + 1); | |
435 | usb_clear_port_feature(dev, i + 1, | |
436 | USB_PORT_FEAT_C_OVER_CURRENT); | |
437 | usb_hub_power_on(hub); | |
438 | } | |
439 | ||
440 | if (portchange & USB_PORT_STAT_C_RESET) { | |
441 | USB_HUB_PRINTF("port %d reset change\n", i + 1); | |
442 | usb_clear_port_feature(dev, i + 1, | |
443 | USB_PORT_FEAT_C_RESET); | |
444 | } | |
445 | } /* end for i all ports */ | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
450 | int usb_hub_probe(struct usb_device *dev, int ifnum) | |
451 | { | |
452 | struct usb_interface *iface; | |
453 | struct usb_endpoint_descriptor *ep; | |
454 | int ret; | |
455 | ||
456 | iface = &dev->config.if_desc[ifnum]; | |
457 | /* Is it a hub? */ | |
458 | if (iface->desc.bInterfaceClass != USB_CLASS_HUB) | |
459 | return 0; | |
460 | /* Some hubs have a subclass of 1, which AFAICT according to the */ | |
461 | /* specs is not defined, but it works */ | |
462 | if ((iface->desc.bInterfaceSubClass != 0) && | |
463 | (iface->desc.bInterfaceSubClass != 1)) | |
464 | return 0; | |
465 | /* Multiple endpoints? What kind of mutant ninja-hub is this? */ | |
466 | if (iface->desc.bNumEndpoints != 1) | |
467 | return 0; | |
468 | ep = &iface->ep_desc[0]; | |
469 | /* Output endpoint? Curiousier and curiousier.. */ | |
470 | if (!(ep->bEndpointAddress & USB_DIR_IN)) | |
471 | return 0; | |
472 | /* If it's not an interrupt endpoint, we'd better punt! */ | |
473 | if ((ep->bmAttributes & 3) != 3) | |
474 | return 0; | |
475 | /* We found a hub */ | |
476 | USB_HUB_PRINTF("USB hub found\n"); | |
477 | ret = usb_hub_configure(dev); | |
478 | return ret; | |
479 | } |