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Marek Vasut23faf2b2012-02-13 18:58:17 +00001/*
Marek Vasut23faf2b2012-02-13 18:58:17 +00002 * 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 *
Wolfgang Denk1a459662013-07-08 09:37:19 +020017 * SPDX-License-Identifier: GPL-2.0+
Marek Vasut23faf2b2012-02-13 18:58:17 +000018 */
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>
27#include <asm/processor.h>
Lucas Stach93ad9082012-09-06 08:00:13 +020028#include <asm/unaligned.h>
Marek Vasut23faf2b2012-02-13 18:58:17 +000029#include <linux/ctype.h>
30#include <asm/byteorder.h>
31#include <asm/unaligned.h>
32
33#include <usb.h>
34#ifdef CONFIG_4xx
35#include <asm/4xx_pci.h>
36#endif
37
Kuo-Jung Suaa155052013-05-15 15:29:22 +080038#ifndef CONFIG_USB_HUB_MIN_POWER_ON_DELAY
39#define CONFIG_USB_HUB_MIN_POWER_ON_DELAY 100
40#endif
41
Marek Vasut23faf2b2012-02-13 18:58:17 +000042#define USB_BUFSIZ 512
43
44static struct usb_hub_device hub_dev[USB_MAX_HUB];
45static int usb_hub_index;
46
47
48static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
49{
50 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
51 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
52 USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
53}
54
55static int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
56{
57 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
58 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
59 port, NULL, 0, USB_CNTL_TIMEOUT);
60}
61
62static int usb_set_port_feature(struct usb_device *dev, int port, int feature)
63{
64 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
65 USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
66 port, NULL, 0, USB_CNTL_TIMEOUT);
67}
68
69static int usb_get_hub_status(struct usb_device *dev, void *data)
70{
71 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
72 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
73 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
74}
75
76static int usb_get_port_status(struct usb_device *dev, int port, void *data)
77{
78 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
79 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
80 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
81}
82
83
84static void usb_hub_power_on(struct usb_hub_device *hub)
85{
86 int i;
87 struct usb_device *dev;
Wolfgang Grandeggera1a28c62011-12-21 00:01:09 +000088 unsigned pgood_delay = hub->desc.bPwrOn2PwrGood * 2;
Vivek Gautam020bbcb2013-04-12 16:34:35 +053089 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
90 unsigned short portstatus;
91 int ret;
Marek Vasut23faf2b2012-02-13 18:58:17 +000092
93 dev = hub->pusb_dev;
Vivek Gautam0bf796f2013-04-24 02:50:11 +000094
95 /*
96 * Enable power to the ports:
97 * Here we Power-cycle the ports: aka,
98 * turning them off and turning on again.
99 */
Vivek Gautamceb49722013-04-12 16:34:33 +0530100 debug("enabling power on all ports\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000101 for (i = 0; i < dev->maxchild; i++) {
Vivek Gautam020bbcb2013-04-12 16:34:35 +0530102 usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
103 debug("port %d returns %lX\n", i + 1, dev->status);
Vivek Gautam0bf796f2013-04-24 02:50:11 +0000104 }
Vivek Gautam020bbcb2013-04-12 16:34:35 +0530105
Vivek Gautam0bf796f2013-04-24 02:50:11 +0000106 /* Wait at least 2*bPwrOn2PwrGood for PP to change */
107 mdelay(pgood_delay);
Vivek Gautam020bbcb2013-04-12 16:34:35 +0530108
Vivek Gautam0bf796f2013-04-24 02:50:11 +0000109 for (i = 0; i < dev->maxchild; i++) {
Vivek Gautam020bbcb2013-04-12 16:34:35 +0530110 ret = usb_get_port_status(dev, i + 1, portsts);
111 if (ret < 0) {
112 debug("port %d: get_port_status failed\n", i + 1);
Nikita Kiryanov0adc3312013-07-29 13:27:39 +0300113 continue;
Vivek Gautam020bbcb2013-04-12 16:34:35 +0530114 }
115
116 /*
117 * Check to confirm the state of Port Power:
118 * xHCI says "After modifying PP, s/w shall read
119 * PP and confirm that it has reached the desired state
120 * before modifying it again, undefined behavior may occur
121 * if this procedure is not followed".
122 * EHCI doesn't say anything like this, but no harm in keeping
123 * this.
124 */
125 portstatus = le16_to_cpu(portsts->wPortStatus);
126 if (portstatus & (USB_PORT_STAT_POWER << 1)) {
127 debug("port %d: Port power change failed\n", i + 1);
Nikita Kiryanov0adc3312013-07-29 13:27:39 +0300128 continue;
Vivek Gautam020bbcb2013-04-12 16:34:35 +0530129 }
Vivek Gautam0bf796f2013-04-24 02:50:11 +0000130 }
Vivek Gautam020bbcb2013-04-12 16:34:35 +0530131
Vivek Gautam0bf796f2013-04-24 02:50:11 +0000132 for (i = 0; i < dev->maxchild; i++) {
Marek Vasut23faf2b2012-02-13 18:58:17 +0000133 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
Vivek Gautamceb49722013-04-12 16:34:33 +0530134 debug("port %d returns %lX\n", i + 1, dev->status);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000135 }
Wolfgang Grandeggera1a28c62011-12-21 00:01:09 +0000136
Kuo-Jung Suaa155052013-05-15 15:29:22 +0800137 /* Wait for power to become stable */
138 mdelay(max(pgood_delay, CONFIG_USB_HUB_MIN_POWER_ON_DELAY));
Marek Vasut23faf2b2012-02-13 18:58:17 +0000139}
140
141void usb_hub_reset(void)
142{
143 usb_hub_index = 0;
144}
145
146static struct usb_hub_device *usb_hub_allocate(void)
147{
148 if (usb_hub_index < USB_MAX_HUB)
149 return &hub_dev[usb_hub_index++];
150
151 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
152 return NULL;
153}
154
155#define MAX_TRIES 5
156
157static inline char *portspeed(int portstatus)
158{
Vivek Gautam55f4b572013-04-24 02:50:12 +0000159 char *speed_str;
160
161 switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
162 case USB_PORT_STAT_SUPER_SPEED:
163 speed_str = "5 Gb/s";
164 break;
165 case USB_PORT_STAT_HIGH_SPEED:
166 speed_str = "480 Mb/s";
167 break;
168 case USB_PORT_STAT_LOW_SPEED:
169 speed_str = "1.5 Mb/s";
170 break;
171 default:
172 speed_str = "12 Mb/s";
173 break;
174 }
175
176 return speed_str;
Marek Vasut23faf2b2012-02-13 18:58:17 +0000177}
178
179int hub_port_reset(struct usb_device *dev, int port,
180 unsigned short *portstat)
181{
182 int tries;
Puneet Saxenaf5766132012-04-03 14:56:06 +0530183 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000184 unsigned short portstatus, portchange;
185
Vivek Gautamceb49722013-04-12 16:34:33 +0530186 debug("hub_port_reset: resetting port %d...\n", port);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000187 for (tries = 0; tries < MAX_TRIES; tries++) {
188
189 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
Mike Frysinger5b84dd62012-03-05 13:47:00 +0000190 mdelay(200);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000191
Puneet Saxenaf5766132012-04-03 14:56:06 +0530192 if (usb_get_port_status(dev, port + 1, portsts) < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530193 debug("get_port_status failed status %lX\n",
194 dev->status);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000195 return -1;
196 }
Puneet Saxenaf5766132012-04-03 14:56:06 +0530197 portstatus = le16_to_cpu(portsts->wPortStatus);
198 portchange = le16_to_cpu(portsts->wPortChange);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000199
Vivek Gautamceb49722013-04-12 16:34:33 +0530200 debug("portstatus %x, change %x, %s\n", portstatus, portchange,
201 portspeed(portstatus));
Marek Vasut23faf2b2012-02-13 18:58:17 +0000202
Vivek Gautamceb49722013-04-12 16:34:33 +0530203 debug("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
204 " USB_PORT_STAT_ENABLE %d\n",
205 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
206 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
207 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000208
209 if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
210 !(portstatus & USB_PORT_STAT_CONNECTION))
211 return -1;
212
213 if (portstatus & USB_PORT_STAT_ENABLE)
214 break;
215
Mike Frysinger5b84dd62012-03-05 13:47:00 +0000216 mdelay(200);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000217 }
218
219 if (tries == MAX_TRIES) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530220 debug("Cannot enable port %i after %i retries, " \
221 "disabling port.\n", port + 1, MAX_TRIES);
222 debug("Maybe the USB cable is bad?\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000223 return -1;
224 }
225
226 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
227 *portstat = portstatus;
228 return 0;
229}
230
231
232void usb_hub_port_connect_change(struct usb_device *dev, int port)
233{
234 struct usb_device *usb;
Puneet Saxenaf5766132012-04-03 14:56:06 +0530235 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000236 unsigned short portstatus;
237
238 /* Check status */
Puneet Saxenaf5766132012-04-03 14:56:06 +0530239 if (usb_get_port_status(dev, port + 1, portsts) < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530240 debug("get_port_status failed\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000241 return;
242 }
243
Puneet Saxenaf5766132012-04-03 14:56:06 +0530244 portstatus = le16_to_cpu(portsts->wPortStatus);
Vivek Gautamceb49722013-04-12 16:34:33 +0530245 debug("portstatus %x, change %x, %s\n",
246 portstatus,
247 le16_to_cpu(portsts->wPortChange),
248 portspeed(portstatus));
Marek Vasut23faf2b2012-02-13 18:58:17 +0000249
250 /* Clear the connection change status */
251 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
252
253 /* Disconnect any existing devices under this port */
254 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
255 (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530256 debug("usb_disconnect(&hub->children[port]);\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000257 /* Return now if nothing is connected */
258 if (!(portstatus & USB_PORT_STAT_CONNECTION))
259 return;
260 }
Mike Frysinger5b84dd62012-03-05 13:47:00 +0000261 mdelay(200);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000262
263 /* Reset the port */
264 if (hub_port_reset(dev, port, &portstatus) < 0) {
265 printf("cannot reset port %i!?\n", port + 1);
266 return;
267 }
268
Mike Frysinger5b84dd62012-03-05 13:47:00 +0000269 mdelay(200);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000270
271 /* Allocate a new device struct for it */
Lucas Stachc7e3b2b2012-09-26 00:14:34 +0200272 usb = usb_alloc_new_device(dev->controller);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000273
Vivek Gautam55f4b572013-04-24 02:50:12 +0000274 switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
275 case USB_PORT_STAT_SUPER_SPEED:
Vivek Gautam6497c662013-04-12 16:34:38 +0530276 usb->speed = USB_SPEED_SUPER;
Vivek Gautam55f4b572013-04-24 02:50:12 +0000277 break;
278 case USB_PORT_STAT_HIGH_SPEED:
Marek Vasut23faf2b2012-02-13 18:58:17 +0000279 usb->speed = USB_SPEED_HIGH;
Vivek Gautam55f4b572013-04-24 02:50:12 +0000280 break;
281 case USB_PORT_STAT_LOW_SPEED:
Marek Vasut23faf2b2012-02-13 18:58:17 +0000282 usb->speed = USB_SPEED_LOW;
Vivek Gautam55f4b572013-04-24 02:50:12 +0000283 break;
284 default:
Marek Vasut23faf2b2012-02-13 18:58:17 +0000285 usb->speed = USB_SPEED_FULL;
Vivek Gautam55f4b572013-04-24 02:50:12 +0000286 break;
287 }
Marek Vasut23faf2b2012-02-13 18:58:17 +0000288
289 dev->children[port] = usb;
290 usb->parent = dev;
291 usb->portnr = port + 1;
292 /* Run it through the hoops (find a driver, etc) */
293 if (usb_new_device(usb)) {
294 /* Woops, disable the port */
Milind Choudhary359439d2012-12-12 17:55:28 -0800295 usb_free_device();
296 dev->children[port] = NULL;
Vivek Gautamceb49722013-04-12 16:34:33 +0530297 debug("hub: disabling port %d\n", port + 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000298 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
299 }
300}
301
302
303static int usb_hub_configure(struct usb_device *dev)
304{
305 int i;
Puneet Saxenaf5766132012-04-03 14:56:06 +0530306 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ);
307 unsigned char *bitmap;
Lucas Stach93ad9082012-09-06 08:00:13 +0200308 short hubCharacteristics;
Marek Vasut23faf2b2012-02-13 18:58:17 +0000309 struct usb_hub_descriptor *descriptor;
310 struct usb_hub_device *hub;
Vivek Gautamceb49722013-04-12 16:34:33 +0530311 __maybe_unused struct usb_hub_status *hubsts;
Marek Vasut23faf2b2012-02-13 18:58:17 +0000312
313 /* "allocate" Hub device */
314 hub = usb_hub_allocate();
315 if (hub == NULL)
316 return -1;
317 hub->pusb_dev = dev;
318 /* Get the the hub descriptor */
319 if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530320 debug("usb_hub_configure: failed to get hub " \
321 "descriptor, giving up %lX\n", dev->status);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000322 return -1;
323 }
324 descriptor = (struct usb_hub_descriptor *)buffer;
325
326 /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
327 i = descriptor->bLength;
328 if (i > USB_BUFSIZ) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530329 debug("usb_hub_configure: failed to get hub " \
330 "descriptor - too long: %d\n", descriptor->bLength);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000331 return -1;
332 }
333
334 if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530335 debug("usb_hub_configure: failed to get hub " \
336 "descriptor 2nd giving up %lX\n", dev->status);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000337 return -1;
338 }
339 memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
340 /* adjust 16bit values */
Lucas Stach93ad9082012-09-06 08:00:13 +0200341 put_unaligned(le16_to_cpu(get_unaligned(
342 &descriptor->wHubCharacteristics)),
343 &hub->desc.wHubCharacteristics);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000344 /* set the bitmap */
345 bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
346 /* devices not removable by default */
347 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
348 bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
349 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
350
351 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
352 hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
353
354 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
355 hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];
356
357 dev->maxchild = descriptor->bNbrPorts;
Vivek Gautamceb49722013-04-12 16:34:33 +0530358 debug("%d ports detected\n", dev->maxchild);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000359
Lucas Stach93ad9082012-09-06 08:00:13 +0200360 hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics);
361 switch (hubCharacteristics & HUB_CHAR_LPSM) {
Marek Vasut23faf2b2012-02-13 18:58:17 +0000362 case 0x00:
Vivek Gautamceb49722013-04-12 16:34:33 +0530363 debug("ganged power switching\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000364 break;
365 case 0x01:
Vivek Gautamceb49722013-04-12 16:34:33 +0530366 debug("individual port power switching\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000367 break;
368 case 0x02:
369 case 0x03:
Vivek Gautamceb49722013-04-12 16:34:33 +0530370 debug("unknown reserved power switching mode\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000371 break;
372 }
373
Lucas Stach93ad9082012-09-06 08:00:13 +0200374 if (hubCharacteristics & HUB_CHAR_COMPOUND)
Vivek Gautamceb49722013-04-12 16:34:33 +0530375 debug("part of a compound device\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000376 else
Vivek Gautamceb49722013-04-12 16:34:33 +0530377 debug("standalone hub\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000378
Lucas Stach93ad9082012-09-06 08:00:13 +0200379 switch (hubCharacteristics & HUB_CHAR_OCPM) {
Marek Vasut23faf2b2012-02-13 18:58:17 +0000380 case 0x00:
Vivek Gautamceb49722013-04-12 16:34:33 +0530381 debug("global over-current protection\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000382 break;
383 case 0x08:
Vivek Gautamceb49722013-04-12 16:34:33 +0530384 debug("individual port over-current protection\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000385 break;
386 case 0x10:
387 case 0x18:
Vivek Gautamceb49722013-04-12 16:34:33 +0530388 debug("no over-current protection\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000389 break;
390 }
391
Vivek Gautamceb49722013-04-12 16:34:33 +0530392 debug("power on to power good time: %dms\n",
393 descriptor->bPwrOn2PwrGood * 2);
394 debug("hub controller current requirement: %dmA\n",
395 descriptor->bHubContrCurrent);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000396
397 for (i = 0; i < dev->maxchild; i++)
Vivek Gautamceb49722013-04-12 16:34:33 +0530398 debug("port %d is%s removable\n", i + 1,
399 hub->desc.DeviceRemovable[(i + 1) / 8] & \
400 (1 << ((i + 1) % 8)) ? " not" : "");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000401
402 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530403 debug("usb_hub_configure: failed to get Status - " \
404 "too long: %d\n", descriptor->bLength);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000405 return -1;
406 }
407
408 if (usb_get_hub_status(dev, buffer) < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530409 debug("usb_hub_configure: failed to get Status %lX\n",
410 dev->status);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000411 return -1;
412 }
413
Vivek Gautamceb49722013-04-12 16:34:33 +0530414#ifdef DEBUG
Marek Vasut23faf2b2012-02-13 18:58:17 +0000415 hubsts = (struct usb_hub_status *)buffer;
416#endif
Vivek Gautamceb49722013-04-12 16:34:33 +0530417
418 debug("get_hub_status returned status %X, change %X\n",
419 le16_to_cpu(hubsts->wHubStatus),
420 le16_to_cpu(hubsts->wHubChange));
421 debug("local power source is %s\n",
422 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
423 "lost (inactive)" : "good");
424 debug("%sover-current condition exists\n",
425 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
426 "" : "no ");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000427 usb_hub_power_on(hub);
428
429 for (i = 0; i < dev->maxchild; i++) {
Puneet Saxenaf5766132012-04-03 14:56:06 +0530430 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000431 unsigned short portstatus, portchange;
Vipin Kumarb6d78522012-12-13 16:25:53 +0530432 int ret;
433 ulong start = get_timer(0);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000434
Vipin Kumarb6d78522012-12-13 16:25:53 +0530435 /*
436 * Wait for (whichever finishes first)
437 * - A maximum of 10 seconds
438 * This is a purely observational value driven by connecting
439 * a few broken pen drives and taking the max * 1.5 approach
440 * - connection_change and connection state to report same
441 * state
442 */
443 do {
444 ret = usb_get_port_status(dev, i + 1, portsts);
445 if (ret < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530446 debug("get_port_status failed\n");
Vipin Kumarb6d78522012-12-13 16:25:53 +0530447 break;
448 }
449
450 portstatus = le16_to_cpu(portsts->wPortStatus);
451 portchange = le16_to_cpu(portsts->wPortChange);
452
453 if ((portchange & USB_PORT_STAT_C_CONNECTION) ==
454 (portstatus & USB_PORT_STAT_CONNECTION))
455 break;
456
Vipin Kumarb6d78522012-12-13 16:25:53 +0530457 } while (get_timer(start) < CONFIG_SYS_HZ * 10);
458
459 if (ret < 0)
Marek Vasut23faf2b2012-02-13 18:58:17 +0000460 continue;
Marek Vasut23faf2b2012-02-13 18:58:17 +0000461
Vivek Gautamceb49722013-04-12 16:34:33 +0530462 debug("Port %d Status %X Change %X\n",
463 i + 1, portstatus, portchange);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000464
465 if (portchange & USB_PORT_STAT_C_CONNECTION) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530466 debug("port %d connection change\n", i + 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000467 usb_hub_port_connect_change(dev, i);
468 }
469 if (portchange & USB_PORT_STAT_C_ENABLE) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530470 debug("port %d enable change, status %x\n",
471 i + 1, portstatus);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000472 usb_clear_port_feature(dev, i + 1,
473 USB_PORT_FEAT_C_ENABLE);
Kuo-Jung Sue82a3162013-05-15 15:29:23 +0800474 /*
475 * The following hack causes a ghost device problem
476 * to Faraday EHCI
477 */
478#ifndef CONFIG_USB_EHCI_FARADAY
Marek Vasut23faf2b2012-02-13 18:58:17 +0000479 /* EM interference sometimes causes bad shielded USB
480 * devices to be shutdown by the hub, this hack enables
481 * them again. Works at least with mouse driver */
482 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
483 (portstatus & USB_PORT_STAT_CONNECTION) &&
484 ((dev->children[i]))) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530485 debug("already running port %i " \
486 "disabled by hub (EMI?), " \
487 "re-enabling...\n", i + 1);
488 usb_hub_port_connect_change(dev, i);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000489 }
Kuo-Jung Sue82a3162013-05-15 15:29:23 +0800490#endif
Marek Vasut23faf2b2012-02-13 18:58:17 +0000491 }
492 if (portstatus & USB_PORT_STAT_SUSPEND) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530493 debug("port %d suspend change\n", i + 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000494 usb_clear_port_feature(dev, i + 1,
495 USB_PORT_FEAT_SUSPEND);
496 }
497
498 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530499 debug("port %d over-current change\n", i + 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000500 usb_clear_port_feature(dev, i + 1,
501 USB_PORT_FEAT_C_OVER_CURRENT);
502 usb_hub_power_on(hub);
503 }
504
505 if (portchange & USB_PORT_STAT_C_RESET) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530506 debug("port %d reset change\n", i + 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000507 usb_clear_port_feature(dev, i + 1,
508 USB_PORT_FEAT_C_RESET);
509 }
510 } /* end for i all ports */
511
512 return 0;
513}
514
515int usb_hub_probe(struct usb_device *dev, int ifnum)
516{
517 struct usb_interface *iface;
518 struct usb_endpoint_descriptor *ep;
519 int ret;
520
521 iface = &dev->config.if_desc[ifnum];
522 /* Is it a hub? */
523 if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
524 return 0;
525 /* Some hubs have a subclass of 1, which AFAICT according to the */
526 /* specs is not defined, but it works */
527 if ((iface->desc.bInterfaceSubClass != 0) &&
528 (iface->desc.bInterfaceSubClass != 1))
529 return 0;
530 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
531 if (iface->desc.bNumEndpoints != 1)
532 return 0;
533 ep = &iface->ep_desc[0];
534 /* Output endpoint? Curiousier and curiousier.. */
535 if (!(ep->bEndpointAddress & USB_DIR_IN))
536 return 0;
537 /* If it's not an interrupt endpoint, we'd better punt! */
538 if ((ep->bmAttributes & 3) != 3)
539 return 0;
540 /* We found a hub */
Vivek Gautamceb49722013-04-12 16:34:33 +0530541 debug("USB hub found\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000542 ret = usb_hub_configure(dev);
543 return ret;
544}