blob: 66b4a725d1b3c1d2caf0fe005fe40e036b9b251f [file] [log] [blame]
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
Marek Vasut23faf2b2012-02-13 18:58:17 +000038#define USB_BUFSIZ 512
39
40static struct usb_hub_device hub_dev[USB_MAX_HUB];
41static int usb_hub_index;
42
Dan Murphy3615a992013-08-01 14:06:01 -050043__weak void usb_hub_reset_devices(int port)
44{
45 return;
46}
Marek Vasut23faf2b2012-02-13 18:58:17 +000047
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;
Marek Vasut23faf2b2012-02-13 18:58:17 +000089
90 dev = hub->pusb_dev;
Vivek Gautam0bf796f2013-04-24 02:50:11 +000091
Vivek Gautamceb49722013-04-12 16:34:33 +053092 debug("enabling power on all ports\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +000093 for (i = 0; i < dev->maxchild; i++) {
94 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
Vivek Gautamceb49722013-04-12 16:34:33 +053095 debug("port %d returns %lX\n", i + 1, dev->status);
Marek Vasut23faf2b2012-02-13 18:58:17 +000096 }
Wolfgang Grandeggera1a28c62011-12-21 00:01:09 +000097
Stephen Warren0d437bc2014-05-19 14:21:17 -060098 /*
99 * Wait for power to become stable,
100 * plus spec-defined max time for device to connect
101 */
Stephen Warren77b83e62014-05-19 14:21:18 -0600102 mdelay(pgood_delay + 1000);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000103}
104
105void usb_hub_reset(void)
106{
107 usb_hub_index = 0;
108}
109
110static struct usb_hub_device *usb_hub_allocate(void)
111{
112 if (usb_hub_index < USB_MAX_HUB)
113 return &hub_dev[usb_hub_index++];
114
115 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
116 return NULL;
117}
118
119#define MAX_TRIES 5
120
121static inline char *portspeed(int portstatus)
122{
Vivek Gautam55f4b572013-04-24 02:50:12 +0000123 char *speed_str;
124
125 switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
126 case USB_PORT_STAT_SUPER_SPEED:
127 speed_str = "5 Gb/s";
128 break;
129 case USB_PORT_STAT_HIGH_SPEED:
130 speed_str = "480 Mb/s";
131 break;
132 case USB_PORT_STAT_LOW_SPEED:
133 speed_str = "1.5 Mb/s";
134 break;
135 default:
136 speed_str = "12 Mb/s";
137 break;
138 }
139
140 return speed_str;
Marek Vasut23faf2b2012-02-13 18:58:17 +0000141}
142
143int hub_port_reset(struct usb_device *dev, int port,
144 unsigned short *portstat)
145{
146 int tries;
Puneet Saxenaf5766132012-04-03 14:56:06 +0530147 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000148 unsigned short portstatus, portchange;
149
Vivek Gautamceb49722013-04-12 16:34:33 +0530150 debug("hub_port_reset: resetting port %d...\n", port);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000151 for (tries = 0; tries < MAX_TRIES; tries++) {
152
153 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
Mike Frysinger5b84dd62012-03-05 13:47:00 +0000154 mdelay(200);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000155
Puneet Saxenaf5766132012-04-03 14:56:06 +0530156 if (usb_get_port_status(dev, port + 1, portsts) < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530157 debug("get_port_status failed status %lX\n",
158 dev->status);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000159 return -1;
160 }
Puneet Saxenaf5766132012-04-03 14:56:06 +0530161 portstatus = le16_to_cpu(portsts->wPortStatus);
162 portchange = le16_to_cpu(portsts->wPortChange);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000163
Vivek Gautamceb49722013-04-12 16:34:33 +0530164 debug("portstatus %x, change %x, %s\n", portstatus, portchange,
165 portspeed(portstatus));
Marek Vasut23faf2b2012-02-13 18:58:17 +0000166
Vivek Gautamceb49722013-04-12 16:34:33 +0530167 debug("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
168 " USB_PORT_STAT_ENABLE %d\n",
169 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
170 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
171 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000172
Stephen Warren74c0d752014-08-07 17:07:59 -0600173 /*
174 * Perhaps we should check for the following here:
175 * - C_CONNECTION hasn't been set.
176 * - CONNECTION is still set.
177 *
178 * Doing so would ensure that the device is still connected
179 * to the bus, and hasn't been unplugged or replaced while the
180 * USB bus reset was going on.
181 *
182 * However, if we do that, then (at least) a San Disk Ultra
183 * USB 3.0 16GB device fails to reset on (at least) an NVIDIA
184 * Tegra Jetson TK1 board. For some reason, the device appears
185 * to briefly drop off the bus when this second bus reset is
186 * executed, yet if we retry this loop, it'll eventually come
187 * back after another reset or two.
188 */
Marek Vasut23faf2b2012-02-13 18:58:17 +0000189
190 if (portstatus & USB_PORT_STAT_ENABLE)
191 break;
192
Mike Frysinger5b84dd62012-03-05 13:47:00 +0000193 mdelay(200);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000194 }
195
196 if (tries == MAX_TRIES) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530197 debug("Cannot enable port %i after %i retries, " \
198 "disabling port.\n", port + 1, MAX_TRIES);
199 debug("Maybe the USB cable is bad?\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000200 return -1;
201 }
202
203 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
204 *portstat = portstatus;
205 return 0;
206}
207
208
209void usb_hub_port_connect_change(struct usb_device *dev, int port)
210{
211 struct usb_device *usb;
Puneet Saxenaf5766132012-04-03 14:56:06 +0530212 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000213 unsigned short portstatus;
214
215 /* Check status */
Puneet Saxenaf5766132012-04-03 14:56:06 +0530216 if (usb_get_port_status(dev, port + 1, portsts) < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530217 debug("get_port_status failed\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000218 return;
219 }
220
Puneet Saxenaf5766132012-04-03 14:56:06 +0530221 portstatus = le16_to_cpu(portsts->wPortStatus);
Vivek Gautamceb49722013-04-12 16:34:33 +0530222 debug("portstatus %x, change %x, %s\n",
223 portstatus,
224 le16_to_cpu(portsts->wPortChange),
225 portspeed(portstatus));
Marek Vasut23faf2b2012-02-13 18:58:17 +0000226
227 /* Clear the connection change status */
228 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
229
230 /* Disconnect any existing devices under this port */
231 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
232 (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530233 debug("usb_disconnect(&hub->children[port]);\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000234 /* Return now if nothing is connected */
235 if (!(portstatus & USB_PORT_STAT_CONNECTION))
236 return;
237 }
Mike Frysinger5b84dd62012-03-05 13:47:00 +0000238 mdelay(200);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000239
240 /* Reset the port */
241 if (hub_port_reset(dev, port, &portstatus) < 0) {
242 printf("cannot reset port %i!?\n", port + 1);
243 return;
244 }
245
Mike Frysinger5b84dd62012-03-05 13:47:00 +0000246 mdelay(200);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000247
248 /* Allocate a new device struct for it */
Lucas Stachc7e3b2b2012-09-26 00:14:34 +0200249 usb = usb_alloc_new_device(dev->controller);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000250
Vivek Gautam55f4b572013-04-24 02:50:12 +0000251 switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
252 case USB_PORT_STAT_SUPER_SPEED:
Vivek Gautam6497c662013-04-12 16:34:38 +0530253 usb->speed = USB_SPEED_SUPER;
Vivek Gautam55f4b572013-04-24 02:50:12 +0000254 break;
255 case USB_PORT_STAT_HIGH_SPEED:
Marek Vasut23faf2b2012-02-13 18:58:17 +0000256 usb->speed = USB_SPEED_HIGH;
Vivek Gautam55f4b572013-04-24 02:50:12 +0000257 break;
258 case USB_PORT_STAT_LOW_SPEED:
Marek Vasut23faf2b2012-02-13 18:58:17 +0000259 usb->speed = USB_SPEED_LOW;
Vivek Gautam55f4b572013-04-24 02:50:12 +0000260 break;
261 default:
Marek Vasut23faf2b2012-02-13 18:58:17 +0000262 usb->speed = USB_SPEED_FULL;
Vivek Gautam55f4b572013-04-24 02:50:12 +0000263 break;
264 }
Marek Vasut23faf2b2012-02-13 18:58:17 +0000265
266 dev->children[port] = usb;
267 usb->parent = dev;
268 usb->portnr = port + 1;
269 /* Run it through the hoops (find a driver, etc) */
270 if (usb_new_device(usb)) {
271 /* Woops, disable the port */
Milind Choudhary359439d2012-12-12 17:55:28 -0800272 usb_free_device();
273 dev->children[port] = NULL;
Vivek Gautamceb49722013-04-12 16:34:33 +0530274 debug("hub: disabling port %d\n", port + 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000275 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
276 }
277}
278
279
280static int usb_hub_configure(struct usb_device *dev)
281{
Julius Wernereaf3e612013-07-19 13:12:08 -0700282 int i, length;
Puneet Saxenaf5766132012-04-03 14:56:06 +0530283 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ);
284 unsigned char *bitmap;
Lucas Stach93ad9082012-09-06 08:00:13 +0200285 short hubCharacteristics;
Marek Vasut23faf2b2012-02-13 18:58:17 +0000286 struct usb_hub_descriptor *descriptor;
287 struct usb_hub_device *hub;
Vivek Gautamceb49722013-04-12 16:34:33 +0530288 __maybe_unused struct usb_hub_status *hubsts;
Marek Vasut23faf2b2012-02-13 18:58:17 +0000289
290 /* "allocate" Hub device */
291 hub = usb_hub_allocate();
292 if (hub == NULL)
293 return -1;
294 hub->pusb_dev = dev;
295 /* Get the the hub descriptor */
296 if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530297 debug("usb_hub_configure: failed to get hub " \
298 "descriptor, giving up %lX\n", dev->status);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000299 return -1;
300 }
301 descriptor = (struct usb_hub_descriptor *)buffer;
302
Masahiro Yamadab4141192014-11-07 03:03:31 +0900303 length = min_t(int, descriptor->bLength,
304 sizeof(struct usb_hub_descriptor));
Marek Vasut23faf2b2012-02-13 18:58:17 +0000305
Julius Wernereaf3e612013-07-19 13:12:08 -0700306 if (usb_get_hub_descriptor(dev, buffer, length) < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530307 debug("usb_hub_configure: failed to get hub " \
308 "descriptor 2nd giving up %lX\n", dev->status);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000309 return -1;
310 }
Julius Wernereaf3e612013-07-19 13:12:08 -0700311 memcpy((unsigned char *)&hub->desc, buffer, length);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000312 /* adjust 16bit values */
Lucas Stach93ad9082012-09-06 08:00:13 +0200313 put_unaligned(le16_to_cpu(get_unaligned(
314 &descriptor->wHubCharacteristics)),
315 &hub->desc.wHubCharacteristics);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000316 /* set the bitmap */
317 bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
318 /* devices not removable by default */
319 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
320 bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
321 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
322
323 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
324 hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
325
326 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
327 hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];
328
329 dev->maxchild = descriptor->bNbrPorts;
Vivek Gautamceb49722013-04-12 16:34:33 +0530330 debug("%d ports detected\n", dev->maxchild);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000331
Lucas Stach93ad9082012-09-06 08:00:13 +0200332 hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics);
333 switch (hubCharacteristics & HUB_CHAR_LPSM) {
Marek Vasut23faf2b2012-02-13 18:58:17 +0000334 case 0x00:
Vivek Gautamceb49722013-04-12 16:34:33 +0530335 debug("ganged power switching\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000336 break;
337 case 0x01:
Vivek Gautamceb49722013-04-12 16:34:33 +0530338 debug("individual port power switching\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000339 break;
340 case 0x02:
341 case 0x03:
Vivek Gautamceb49722013-04-12 16:34:33 +0530342 debug("unknown reserved power switching mode\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000343 break;
344 }
345
Lucas Stach93ad9082012-09-06 08:00:13 +0200346 if (hubCharacteristics & HUB_CHAR_COMPOUND)
Vivek Gautamceb49722013-04-12 16:34:33 +0530347 debug("part of a compound device\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000348 else
Vivek Gautamceb49722013-04-12 16:34:33 +0530349 debug("standalone hub\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000350
Lucas Stach93ad9082012-09-06 08:00:13 +0200351 switch (hubCharacteristics & HUB_CHAR_OCPM) {
Marek Vasut23faf2b2012-02-13 18:58:17 +0000352 case 0x00:
Vivek Gautamceb49722013-04-12 16:34:33 +0530353 debug("global over-current protection\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000354 break;
355 case 0x08:
Vivek Gautamceb49722013-04-12 16:34:33 +0530356 debug("individual port over-current protection\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000357 break;
358 case 0x10:
359 case 0x18:
Vivek Gautamceb49722013-04-12 16:34:33 +0530360 debug("no over-current protection\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000361 break;
362 }
363
Vivek Gautamceb49722013-04-12 16:34:33 +0530364 debug("power on to power good time: %dms\n",
365 descriptor->bPwrOn2PwrGood * 2);
366 debug("hub controller current requirement: %dmA\n",
367 descriptor->bHubContrCurrent);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000368
369 for (i = 0; i < dev->maxchild; i++)
Vivek Gautamceb49722013-04-12 16:34:33 +0530370 debug("port %d is%s removable\n", i + 1,
371 hub->desc.DeviceRemovable[(i + 1) / 8] & \
372 (1 << ((i + 1) % 8)) ? " not" : "");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000373
374 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530375 debug("usb_hub_configure: failed to get Status - " \
376 "too long: %d\n", descriptor->bLength);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000377 return -1;
378 }
379
380 if (usb_get_hub_status(dev, buffer) < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530381 debug("usb_hub_configure: failed to get Status %lX\n",
382 dev->status);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000383 return -1;
384 }
385
Vivek Gautamceb49722013-04-12 16:34:33 +0530386#ifdef DEBUG
Marek Vasut23faf2b2012-02-13 18:58:17 +0000387 hubsts = (struct usb_hub_status *)buffer;
388#endif
Vivek Gautamceb49722013-04-12 16:34:33 +0530389
390 debug("get_hub_status returned status %X, change %X\n",
391 le16_to_cpu(hubsts->wHubStatus),
392 le16_to_cpu(hubsts->wHubChange));
393 debug("local power source is %s\n",
394 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
395 "lost (inactive)" : "good");
396 debug("%sover-current condition exists\n",
397 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
398 "" : "no ");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000399 usb_hub_power_on(hub);
400
Dan Murphy3615a992013-08-01 14:06:01 -0500401 /*
402 * Reset any devices that may be in a bad state when applying
403 * the power. This is a __weak function. Resetting of the devices
404 * should occur in the board file of the device.
405 */
406 for (i = 0; i < dev->maxchild; i++)
407 usb_hub_reset_devices(i + 1);
408
Marek Vasut23faf2b2012-02-13 18:58:17 +0000409 for (i = 0; i < dev->maxchild; i++) {
Puneet Saxenaf5766132012-04-03 14:56:06 +0530410 ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000411 unsigned short portstatus, portchange;
Vipin Kumarb6d78522012-12-13 16:25:53 +0530412 int ret;
413 ulong start = get_timer(0);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000414
Vipin Kumarb6d78522012-12-13 16:25:53 +0530415 /*
416 * Wait for (whichever finishes first)
417 * - A maximum of 10 seconds
418 * This is a purely observational value driven by connecting
419 * a few broken pen drives and taking the max * 1.5 approach
420 * - connection_change and connection state to report same
421 * state
422 */
423 do {
424 ret = usb_get_port_status(dev, i + 1, portsts);
425 if (ret < 0) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530426 debug("get_port_status failed\n");
Vipin Kumarb6d78522012-12-13 16:25:53 +0530427 break;
428 }
429
430 portstatus = le16_to_cpu(portsts->wPortStatus);
431 portchange = le16_to_cpu(portsts->wPortChange);
432
433 if ((portchange & USB_PORT_STAT_C_CONNECTION) ==
434 (portstatus & USB_PORT_STAT_CONNECTION))
435 break;
436
Vipin Kumarb6d78522012-12-13 16:25:53 +0530437 } while (get_timer(start) < CONFIG_SYS_HZ * 10);
438
439 if (ret < 0)
Marek Vasut23faf2b2012-02-13 18:58:17 +0000440 continue;
Marek Vasut23faf2b2012-02-13 18:58:17 +0000441
Vivek Gautamceb49722013-04-12 16:34:33 +0530442 debug("Port %d Status %X Change %X\n",
443 i + 1, portstatus, portchange);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000444
445 if (portchange & USB_PORT_STAT_C_CONNECTION) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530446 debug("port %d connection change\n", i + 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000447 usb_hub_port_connect_change(dev, i);
448 }
449 if (portchange & USB_PORT_STAT_C_ENABLE) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530450 debug("port %d enable change, status %x\n",
451 i + 1, portstatus);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000452 usb_clear_port_feature(dev, i + 1,
453 USB_PORT_FEAT_C_ENABLE);
Kuo-Jung Sue82a3162013-05-15 15:29:23 +0800454 /*
455 * The following hack causes a ghost device problem
456 * to Faraday EHCI
457 */
458#ifndef CONFIG_USB_EHCI_FARADAY
Marek Vasut23faf2b2012-02-13 18:58:17 +0000459 /* EM interference sometimes causes bad shielded USB
460 * devices to be shutdown by the hub, this hack enables
461 * them again. Works at least with mouse driver */
462 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
463 (portstatus & USB_PORT_STAT_CONNECTION) &&
464 ((dev->children[i]))) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530465 debug("already running port %i " \
466 "disabled by hub (EMI?), " \
467 "re-enabling...\n", i + 1);
468 usb_hub_port_connect_change(dev, i);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000469 }
Kuo-Jung Sue82a3162013-05-15 15:29:23 +0800470#endif
Marek Vasut23faf2b2012-02-13 18:58:17 +0000471 }
472 if (portstatus & USB_PORT_STAT_SUSPEND) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530473 debug("port %d suspend change\n", i + 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000474 usb_clear_port_feature(dev, i + 1,
475 USB_PORT_FEAT_SUSPEND);
476 }
477
478 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530479 debug("port %d over-current change\n", i + 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000480 usb_clear_port_feature(dev, i + 1,
481 USB_PORT_FEAT_C_OVER_CURRENT);
482 usb_hub_power_on(hub);
483 }
484
485 if (portchange & USB_PORT_STAT_C_RESET) {
Vivek Gautamceb49722013-04-12 16:34:33 +0530486 debug("port %d reset change\n", i + 1);
Marek Vasut23faf2b2012-02-13 18:58:17 +0000487 usb_clear_port_feature(dev, i + 1,
488 USB_PORT_FEAT_C_RESET);
489 }
490 } /* end for i all ports */
491
492 return 0;
493}
494
495int usb_hub_probe(struct usb_device *dev, int ifnum)
496{
497 struct usb_interface *iface;
498 struct usb_endpoint_descriptor *ep;
499 int ret;
500
501 iface = &dev->config.if_desc[ifnum];
502 /* Is it a hub? */
503 if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
504 return 0;
505 /* Some hubs have a subclass of 1, which AFAICT according to the */
506 /* specs is not defined, but it works */
507 if ((iface->desc.bInterfaceSubClass != 0) &&
508 (iface->desc.bInterfaceSubClass != 1))
509 return 0;
510 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
511 if (iface->desc.bNumEndpoints != 1)
512 return 0;
513 ep = &iface->ep_desc[0];
514 /* Output endpoint? Curiousier and curiousier.. */
515 if (!(ep->bEndpointAddress & USB_DIR_IN))
516 return 0;
517 /* If it's not an interrupt endpoint, we'd better punt! */
518 if ((ep->bmAttributes & 3) != 3)
519 return 0;
520 /* We found a hub */
Vivek Gautamceb49722013-04-12 16:34:33 +0530521 debug("USB hub found\n");
Marek Vasut23faf2b2012-02-13 18:58:17 +0000522 ret = usb_hub_configure(dev);
523 return ret;
524}