blob: 774ba6387aaa3f4ed26f674b7574495bd1c2186a [file] [log] [blame]
Marek Vasut23faf2b2012-02-13 18:58:17 +00001/*
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>
Lucas Stach93ad9082012-09-06 08:00:13 +020046#include <asm/unaligned.h>
Marek Vasut23faf2b2012-02-13 18:58:17 +000047#include <linux/ctype.h>
48#include <asm/byteorder.h>
49#include <asm/unaligned.h>
50
51#include <usb.h>
52#ifdef CONFIG_4xx
53#include <asm/4xx_pci.h>
54#endif
55
Kuo-Jung Suaa155052013-05-15 15:29:22 +080056#ifndef CONFIG_USB_HUB_MIN_POWER_ON_DELAY
57#define CONFIG_USB_HUB_MIN_POWER_ON_DELAY 100
58#endif
59
Marek Vasut23faf2b2012-02-13 18:58:17 +000060#define USB_BUFSIZ 512
61
62static struct usb_hub_device hub_dev[USB_MAX_HUB];
63static int usb_hub_index;
64
65
66static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
67{
68 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
69 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
70 USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
71}
72
73static int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
74{
75 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
76 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
77 port, NULL, 0, USB_CNTL_TIMEOUT);
78}
79
80static int usb_set_port_feature(struct usb_device *dev, int port, int feature)
81{
82 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
83 USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
84 port, NULL, 0, USB_CNTL_TIMEOUT);
85}
86
87static int usb_get_hub_status(struct usb_device *dev, void *data)
88{
89 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
90 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
91 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
92}
93
94static int usb_get_port_status(struct usb_device *dev, int port, void *data)
95{
96 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
97 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
98 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
99}
100
101
102static void usb_hub_power_on(struct usb_hub_device *hub)
103{
104 int i;
105 struct usb_device *dev;
Wolfgang Grandeggera1a28c62011-12-21 00:01:09 +0000106 unsigned pgood_delay = hub->desc.bPwrOn2PwrGood * 2;
Vivek Gautam020bbcb2013-04-12 16:34:35 +0530107 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
108 unsigned short portstatus;
109 int ret;
Marek Vasut23faf2b2012-02-13 18:58:17 +0000110
111 dev = hub->pusb_dev;
Vivek Gautam0bf796f2013-04-24 02:50:11 +0000112
113 /*
114 * Enable power to the ports:
115 * Here we Power-cycle the ports: aka,
116 * turning them off and turning on again.
117 */
Vivek Gautamceb49722013-04-12 16:34:33 +0530118 debug("enabling power on all ports\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000119 for (i = 0; i < dev->maxchild; i++) {
Vivek Gautam020bbcb2013-04-12 16:34:35 +0530120 usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
121 debug("port %d returns %lX\n", i + 1, dev->status);
Vivek Gautam0bf796f2013-04-24 02:50:11 +0000122 }
Vivek Gautam020bbcb2013-04-12 16:34:35 +0530123
Vivek Gautam0bf796f2013-04-24 02:50:11 +0000124 /* Wait at least 2*bPwrOn2PwrGood for PP to change */
125 mdelay(pgood_delay);
Vivek Gautam020bbcb2013-04-12 16:34:35 +0530126
Vivek Gautam0bf796f2013-04-24 02:50:11 +0000127 for (i = 0; i < dev->maxchild; i++) {
Vivek Gautam020bbcb2013-04-12 16:34:35 +0530128 ret = usb_get_port_status(dev, i + 1, portsts);
129 if (ret < 0) {
130 debug("port %d: get_port_status failed\n", i + 1);
131 return;
132 }
133
134 /*
135 * Check to confirm the state of Port Power:
136 * xHCI says "After modifying PP, s/w shall read
137 * PP and confirm that it has reached the desired state
138 * before modifying it again, undefined behavior may occur
139 * if this procedure is not followed".
140 * EHCI doesn't say anything like this, but no harm in keeping
141 * this.
142 */
143 portstatus = le16_to_cpu(portsts->wPortStatus);
144 if (portstatus & (USB_PORT_STAT_POWER << 1)) {
145 debug("port %d: Port power change failed\n", i + 1);
146 return;
147 }
Vivek Gautam0bf796f2013-04-24 02:50:11 +0000148 }
Vivek Gautam020bbcb2013-04-12 16:34:35 +0530149
Vivek Gautam0bf796f2013-04-24 02:50:11 +0000150 for (i = 0; i < dev->maxchild; i++) {
Marek Vasut23faf2b2012-02-13 18:58:17 +0000151 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
Vivek Gautamceb49722013-04-12 16:34:33 +0530152 debug("port %d returns %lX\n", i + 1, dev->status);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000153 }
Wolfgang Grandeggera1a28c62011-12-21 00:01:09 +0000154
Kuo-Jung Suaa155052013-05-15 15:29:22 +0800155 /* Wait for power to become stable */
156 mdelay(max(pgood_delay, CONFIG_USB_HUB_MIN_POWER_ON_DELAY));
Marek Vasut23faf2b2012-02-13 18:58:17 +0000157}
158
159void usb_hub_reset(void)
160{
161 usb_hub_index = 0;
162}
163
164static struct usb_hub_device *usb_hub_allocate(void)
165{
166 if (usb_hub_index < USB_MAX_HUB)
167 return &hub_dev[usb_hub_index++];
168
169 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
170 return NULL;
171}
172
173#define MAX_TRIES 5
174
175static inline char *portspeed(int portstatus)
176{
Vivek Gautam55f4b572013-04-24 02:50:12 +0000177 char *speed_str;
178
179 switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
180 case USB_PORT_STAT_SUPER_SPEED:
181 speed_str = "5 Gb/s";
182 break;
183 case USB_PORT_STAT_HIGH_SPEED:
184 speed_str = "480 Mb/s";
185 break;
186 case USB_PORT_STAT_LOW_SPEED:
187 speed_str = "1.5 Mb/s";
188 break;
189 default:
190 speed_str = "12 Mb/s";
191 break;
192 }
193
194 return speed_str;
Marek Vasut23faf2b2012-02-13 18:58:17 +0000195}
196
197int hub_port_reset(struct usb_device *dev, int port,
198 unsigned short *portstat)
199{
200 int tries;
Puneet Saxenaf5766132012-04-03 14:56:06 +0530201 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000202 unsigned short portstatus, portchange;
203
Vivek Gautamceb49722013-04-12 16:34:33 +0530204 debug("hub_port_reset: resetting port %d...\n", port);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000205 for (tries = 0; tries < MAX_TRIES; tries++) {
206
207 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
Mike Frysinger5b84dd62012-03-05 13:47:00 +0000208 mdelay(200);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000209
Puneet Saxenaf5766132012-04-03 14:56:06 +0530210 if (usb_get_port_status(dev, port + 1, portsts) < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530211 debug("get_port_status failed status %lX\n",
212 dev->status);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000213 return -1;
214 }
Puneet Saxenaf5766132012-04-03 14:56:06 +0530215 portstatus = le16_to_cpu(portsts->wPortStatus);
216 portchange = le16_to_cpu(portsts->wPortChange);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000217
Vivek Gautamceb49722013-04-12 16:34:33 +0530218 debug("portstatus %x, change %x, %s\n", portstatus, portchange,
219 portspeed(portstatus));
Marek Vasut23faf2b2012-02-13 18:58:17 +0000220
Vivek Gautamceb49722013-04-12 16:34:33 +0530221 debug("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
222 " USB_PORT_STAT_ENABLE %d\n",
223 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
224 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
225 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000226
227 if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
228 !(portstatus & USB_PORT_STAT_CONNECTION))
229 return -1;
230
231 if (portstatus & USB_PORT_STAT_ENABLE)
232 break;
233
Mike Frysinger5b84dd62012-03-05 13:47:00 +0000234 mdelay(200);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000235 }
236
237 if (tries == MAX_TRIES) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530238 debug("Cannot enable port %i after %i retries, " \
239 "disabling port.\n", port + 1, MAX_TRIES);
240 debug("Maybe the USB cable is bad?\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000241 return -1;
242 }
243
244 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
245 *portstat = portstatus;
246 return 0;
247}
248
249
250void usb_hub_port_connect_change(struct usb_device *dev, int port)
251{
252 struct usb_device *usb;
Puneet Saxenaf5766132012-04-03 14:56:06 +0530253 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000254 unsigned short portstatus;
255
256 /* Check status */
Puneet Saxenaf5766132012-04-03 14:56:06 +0530257 if (usb_get_port_status(dev, port + 1, portsts) < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530258 debug("get_port_status failed\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000259 return;
260 }
261
Puneet Saxenaf5766132012-04-03 14:56:06 +0530262 portstatus = le16_to_cpu(portsts->wPortStatus);
Vivek Gautamceb49722013-04-12 16:34:33 +0530263 debug("portstatus %x, change %x, %s\n",
264 portstatus,
265 le16_to_cpu(portsts->wPortChange),
266 portspeed(portstatus));
Marek Vasut23faf2b2012-02-13 18:58:17 +0000267
268 /* Clear the connection change status */
269 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
270
271 /* Disconnect any existing devices under this port */
272 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
273 (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530274 debug("usb_disconnect(&hub->children[port]);\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000275 /* Return now if nothing is connected */
276 if (!(portstatus & USB_PORT_STAT_CONNECTION))
277 return;
278 }
Mike Frysinger5b84dd62012-03-05 13:47:00 +0000279 mdelay(200);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000280
281 /* Reset the port */
282 if (hub_port_reset(dev, port, &portstatus) < 0) {
283 printf("cannot reset port %i!?\n", port + 1);
284 return;
285 }
286
Mike Frysinger5b84dd62012-03-05 13:47:00 +0000287 mdelay(200);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000288
289 /* Allocate a new device struct for it */
Lucas Stachc7e3b2b2012-09-26 00:14:34 +0200290 usb = usb_alloc_new_device(dev->controller);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000291
Vivek Gautam55f4b572013-04-24 02:50:12 +0000292 switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
293 case USB_PORT_STAT_SUPER_SPEED:
Vivek Gautam6497c662013-04-12 16:34:38 +0530294 usb->speed = USB_SPEED_SUPER;
Vivek Gautam55f4b572013-04-24 02:50:12 +0000295 break;
296 case USB_PORT_STAT_HIGH_SPEED:
Marek Vasut23faf2b2012-02-13 18:58:17 +0000297 usb->speed = USB_SPEED_HIGH;
Vivek Gautam55f4b572013-04-24 02:50:12 +0000298 break;
299 case USB_PORT_STAT_LOW_SPEED:
Marek Vasut23faf2b2012-02-13 18:58:17 +0000300 usb->speed = USB_SPEED_LOW;
Vivek Gautam55f4b572013-04-24 02:50:12 +0000301 break;
302 default:
Marek Vasut23faf2b2012-02-13 18:58:17 +0000303 usb->speed = USB_SPEED_FULL;
Vivek Gautam55f4b572013-04-24 02:50:12 +0000304 break;
305 }
Marek Vasut23faf2b2012-02-13 18:58:17 +0000306
307 dev->children[port] = usb;
308 usb->parent = dev;
309 usb->portnr = port + 1;
310 /* Run it through the hoops (find a driver, etc) */
311 if (usb_new_device(usb)) {
312 /* Woops, disable the port */
Milind Choudhary359439d2012-12-12 17:55:28 -0800313 usb_free_device();
314 dev->children[port] = NULL;
Vivek Gautamceb49722013-04-12 16:34:33 +0530315 debug("hub: disabling port %d\n", port + 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000316 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
317 }
318}
319
320
321static int usb_hub_configure(struct usb_device *dev)
322{
323 int i;
Puneet Saxenaf5766132012-04-03 14:56:06 +0530324 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ);
325 unsigned char *bitmap;
Lucas Stach93ad9082012-09-06 08:00:13 +0200326 short hubCharacteristics;
Marek Vasut23faf2b2012-02-13 18:58:17 +0000327 struct usb_hub_descriptor *descriptor;
328 struct usb_hub_device *hub;
Vivek Gautamceb49722013-04-12 16:34:33 +0530329 __maybe_unused struct usb_hub_status *hubsts;
Marek Vasut23faf2b2012-02-13 18:58:17 +0000330
331 /* "allocate" Hub device */
332 hub = usb_hub_allocate();
333 if (hub == NULL)
334 return -1;
335 hub->pusb_dev = dev;
336 /* Get the the hub descriptor */
337 if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530338 debug("usb_hub_configure: failed to get hub " \
339 "descriptor, giving up %lX\n", dev->status);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000340 return -1;
341 }
342 descriptor = (struct usb_hub_descriptor *)buffer;
343
344 /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
345 i = descriptor->bLength;
346 if (i > USB_BUFSIZ) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530347 debug("usb_hub_configure: failed to get hub " \
348 "descriptor - too long: %d\n", descriptor->bLength);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000349 return -1;
350 }
351
352 if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530353 debug("usb_hub_configure: failed to get hub " \
354 "descriptor 2nd giving up %lX\n", dev->status);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000355 return -1;
356 }
357 memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
358 /* adjust 16bit values */
Lucas Stach93ad9082012-09-06 08:00:13 +0200359 put_unaligned(le16_to_cpu(get_unaligned(
360 &descriptor->wHubCharacteristics)),
361 &hub->desc.wHubCharacteristics);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000362 /* set the bitmap */
363 bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
364 /* devices not removable by default */
365 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
366 bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
367 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
368
369 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
370 hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
371
372 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
373 hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];
374
375 dev->maxchild = descriptor->bNbrPorts;
Vivek Gautamceb49722013-04-12 16:34:33 +0530376 debug("%d ports detected\n", dev->maxchild);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000377
Lucas Stach93ad9082012-09-06 08:00:13 +0200378 hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics);
379 switch (hubCharacteristics & HUB_CHAR_LPSM) {
Marek Vasut23faf2b2012-02-13 18:58:17 +0000380 case 0x00:
Vivek Gautamceb49722013-04-12 16:34:33 +0530381 debug("ganged power switching\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000382 break;
383 case 0x01:
Vivek Gautamceb49722013-04-12 16:34:33 +0530384 debug("individual port power switching\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000385 break;
386 case 0x02:
387 case 0x03:
Vivek Gautamceb49722013-04-12 16:34:33 +0530388 debug("unknown reserved power switching mode\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000389 break;
390 }
391
Lucas Stach93ad9082012-09-06 08:00:13 +0200392 if (hubCharacteristics & HUB_CHAR_COMPOUND)
Vivek Gautamceb49722013-04-12 16:34:33 +0530393 debug("part of a compound device\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000394 else
Vivek Gautamceb49722013-04-12 16:34:33 +0530395 debug("standalone hub\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000396
Lucas Stach93ad9082012-09-06 08:00:13 +0200397 switch (hubCharacteristics & HUB_CHAR_OCPM) {
Marek Vasut23faf2b2012-02-13 18:58:17 +0000398 case 0x00:
Vivek Gautamceb49722013-04-12 16:34:33 +0530399 debug("global over-current protection\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000400 break;
401 case 0x08:
Vivek Gautamceb49722013-04-12 16:34:33 +0530402 debug("individual port over-current protection\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000403 break;
404 case 0x10:
405 case 0x18:
Vivek Gautamceb49722013-04-12 16:34:33 +0530406 debug("no over-current protection\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000407 break;
408 }
409
Vivek Gautamceb49722013-04-12 16:34:33 +0530410 debug("power on to power good time: %dms\n",
411 descriptor->bPwrOn2PwrGood * 2);
412 debug("hub controller current requirement: %dmA\n",
413 descriptor->bHubContrCurrent);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000414
415 for (i = 0; i < dev->maxchild; i++)
Vivek Gautamceb49722013-04-12 16:34:33 +0530416 debug("port %d is%s removable\n", i + 1,
417 hub->desc.DeviceRemovable[(i + 1) / 8] & \
418 (1 << ((i + 1) % 8)) ? " not" : "");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000419
420 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530421 debug("usb_hub_configure: failed to get Status - " \
422 "too long: %d\n", descriptor->bLength);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000423 return -1;
424 }
425
426 if (usb_get_hub_status(dev, buffer) < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530427 debug("usb_hub_configure: failed to get Status %lX\n",
428 dev->status);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000429 return -1;
430 }
431
Vivek Gautamceb49722013-04-12 16:34:33 +0530432#ifdef DEBUG
Marek Vasut23faf2b2012-02-13 18:58:17 +0000433 hubsts = (struct usb_hub_status *)buffer;
434#endif
Vivek Gautamceb49722013-04-12 16:34:33 +0530435
436 debug("get_hub_status returned status %X, change %X\n",
437 le16_to_cpu(hubsts->wHubStatus),
438 le16_to_cpu(hubsts->wHubChange));
439 debug("local power source is %s\n",
440 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
441 "lost (inactive)" : "good");
442 debug("%sover-current condition exists\n",
443 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
444 "" : "no ");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000445 usb_hub_power_on(hub);
446
447 for (i = 0; i < dev->maxchild; i++) {
Puneet Saxenaf5766132012-04-03 14:56:06 +0530448 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000449 unsigned short portstatus, portchange;
Vipin Kumarb6d78522012-12-13 16:25:53 +0530450 int ret;
451 ulong start = get_timer(0);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000452
Vipin Kumarb6d78522012-12-13 16:25:53 +0530453 /*
454 * Wait for (whichever finishes first)
455 * - A maximum of 10 seconds
456 * This is a purely observational value driven by connecting
457 * a few broken pen drives and taking the max * 1.5 approach
458 * - connection_change and connection state to report same
459 * state
460 */
461 do {
462 ret = usb_get_port_status(dev, i + 1, portsts);
463 if (ret < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530464 debug("get_port_status failed\n");
Vipin Kumarb6d78522012-12-13 16:25:53 +0530465 break;
466 }
467
468 portstatus = le16_to_cpu(portsts->wPortStatus);
469 portchange = le16_to_cpu(portsts->wPortChange);
470
471 if ((portchange & USB_PORT_STAT_C_CONNECTION) ==
472 (portstatus & USB_PORT_STAT_CONNECTION))
473 break;
474
Vipin Kumarb6d78522012-12-13 16:25:53 +0530475 } while (get_timer(start) < CONFIG_SYS_HZ * 10);
476
477 if (ret < 0)
Marek Vasut23faf2b2012-02-13 18:58:17 +0000478 continue;
Marek Vasut23faf2b2012-02-13 18:58:17 +0000479
Vivek Gautamceb49722013-04-12 16:34:33 +0530480 debug("Port %d Status %X Change %X\n",
481 i + 1, portstatus, portchange);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000482
483 if (portchange & USB_PORT_STAT_C_CONNECTION) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530484 debug("port %d connection change\n", i + 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000485 usb_hub_port_connect_change(dev, i);
486 }
487 if (portchange & USB_PORT_STAT_C_ENABLE) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530488 debug("port %d enable change, status %x\n",
489 i + 1, portstatus);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000490 usb_clear_port_feature(dev, i + 1,
491 USB_PORT_FEAT_C_ENABLE);
Kuo-Jung Sue82a3162013-05-15 15:29:23 +0800492 /*
493 * The following hack causes a ghost device problem
494 * to Faraday EHCI
495 */
496#ifndef CONFIG_USB_EHCI_FARADAY
Marek Vasut23faf2b2012-02-13 18:58:17 +0000497 /* EM interference sometimes causes bad shielded USB
498 * devices to be shutdown by the hub, this hack enables
499 * them again. Works at least with mouse driver */
500 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
501 (portstatus & USB_PORT_STAT_CONNECTION) &&
502 ((dev->children[i]))) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530503 debug("already running port %i " \
504 "disabled by hub (EMI?), " \
505 "re-enabling...\n", i + 1);
506 usb_hub_port_connect_change(dev, i);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000507 }
Kuo-Jung Sue82a3162013-05-15 15:29:23 +0800508#endif
Marek Vasut23faf2b2012-02-13 18:58:17 +0000509 }
510 if (portstatus & USB_PORT_STAT_SUSPEND) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530511 debug("port %d suspend change\n", i + 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000512 usb_clear_port_feature(dev, i + 1,
513 USB_PORT_FEAT_SUSPEND);
514 }
515
516 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530517 debug("port %d over-current change\n", i + 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000518 usb_clear_port_feature(dev, i + 1,
519 USB_PORT_FEAT_C_OVER_CURRENT);
520 usb_hub_power_on(hub);
521 }
522
523 if (portchange & USB_PORT_STAT_C_RESET) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530524 debug("port %d reset change\n", i + 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000525 usb_clear_port_feature(dev, i + 1,
526 USB_PORT_FEAT_C_RESET);
527 }
528 } /* end for i all ports */
529
530 return 0;
531}
532
533int usb_hub_probe(struct usb_device *dev, int ifnum)
534{
535 struct usb_interface *iface;
536 struct usb_endpoint_descriptor *ep;
537 int ret;
538
539 iface = &dev->config.if_desc[ifnum];
540 /* Is it a hub? */
541 if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
542 return 0;
543 /* Some hubs have a subclass of 1, which AFAICT according to the */
544 /* specs is not defined, but it works */
545 if ((iface->desc.bInterfaceSubClass != 0) &&
546 (iface->desc.bInterfaceSubClass != 1))
547 return 0;
548 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
549 if (iface->desc.bNumEndpoints != 1)
550 return 0;
551 ep = &iface->ep_desc[0];
552 /* Output endpoint? Curiousier and curiousier.. */
553 if (!(ep->bEndpointAddress & USB_DIR_IN))
554 return 0;
555 /* If it's not an interrupt endpoint, we'd better punt! */
556 if ((ep->bmAttributes & 3) != 3)
557 return 0;
558 /* We found a hub */
Vivek Gautamceb49722013-04-12 16:34:33 +0530559 debug("USB hub found\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000560 ret = usb_hub_configure(dev);
561 return ret;
562}