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wdenkaffae2b2002-08-17 09:36:01 +00001/*
wdenkaffae2b2002-08-17 09:36:01 +00002 *
3 * Most of this source has been derived from the Linux USB
Wolfgang Denk460c3222005-08-04 01:14:12 +02004 * 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
wdenkaffae2b2002-08-17 09:36:01 +000017 *
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
wdenkaffae2b2002-08-17 09:36:01 +000038/*
39 * How it works:
40 *
41 * Since this is a bootloader, the devices will not be automatic
42 * (re)configured on hotplug, but after a restart of the USB the
43 * device should work.
44 *
45 * For each transfer (except "Interrupt") we wait for completion.
46 */
47#include <common.h>
48#include <command.h>
49#include <asm/processor.h>
Wolfgang Denk9c998aa2005-07-21 11:57:57 +020050#include <linux/ctype.h>
Christian Eggersc9182612008-05-21 22:12:00 +020051#include <asm/byteorder.h>
wdenkaffae2b2002-08-17 09:36:01 +000052
wdenkaffae2b2002-08-17 09:36:01 +000053#include <usb.h>
54#ifdef CONFIG_4xx
Stefan Roese3048bcb2007-10-03 15:01:02 +020055#include <asm/4xx_pci.h>
wdenkaffae2b2002-08-17 09:36:01 +000056#endif
57
Wolfgang Denk095b8a32005-08-02 17:06:17 +020058#undef USB_DEBUG
wdenkaffae2b2002-08-17 09:36:01 +000059
60#ifdef USB_DEBUG
Michael Trimarchide39f8c2008-11-26 17:41:34 +010061#define USB_PRINTF(fmt, args...) printf(fmt , ##args)
wdenkaffae2b2002-08-17 09:36:01 +000062#else
Remy Bohmer6f5794a2008-09-16 14:55:43 +020063#define USB_PRINTF(fmt, args...)
wdenkaffae2b2002-08-17 09:36:01 +000064#endif
65
wdenkcd0a9de2004-02-23 20:48:38 +000066#define USB_BUFSIZ 512
67
wdenkaffae2b2002-08-17 09:36:01 +000068static struct usb_device usb_dev[USB_MAX_DEVICE];
69static int dev_index;
70static int running;
71static int asynch_allowed;
72static struct devrequest setup_packet;
73
Bartlomiej Siekae51aae32006-08-03 23:20:13 +020074char usb_started; /* flag for the started/stopped USB status */
75
wdenkaffae2b2002-08-17 09:36:01 +000076/**********************************************************************
77 * some forward declerations...
78 */
79void usb_scan_devices(void);
80
81int usb_hub_probe(struct usb_device *dev, int ifnum);
82void usb_hub_reset(void);
Remy Bohmerc9e84362008-09-16 14:55:44 +020083static int hub_port_reset(struct usb_device *dev, int port,
84 unsigned short *portstat);
Wolfgang Denk9c998aa2005-07-21 11:57:57 +020085
wdenkaffae2b2002-08-17 09:36:01 +000086/***********************************************************************
87 * wait_ms
88 */
89
Michael Trimarchide39f8c2008-11-26 17:41:34 +010090inline void wait_ms(unsigned long ms)
wdenkaffae2b2002-08-17 09:36:01 +000091{
Remy Bohmer6f5794a2008-09-16 14:55:43 +020092 while (ms-- > 0)
wdenkaffae2b2002-08-17 09:36:01 +000093 udelay(1000);
94}
Michael Trimarchide39f8c2008-11-26 17:41:34 +010095
wdenkaffae2b2002-08-17 09:36:01 +000096/***************************************************************************
97 * Init USB Device
98 */
99
100int usb_init(void)
101{
102 int result;
103
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200104 running = 0;
105 dev_index = 0;
106 asynch_allowed = 1;
wdenkaffae2b2002-08-17 09:36:01 +0000107 usb_hub_reset();
108 /* init low_level USB */
109 printf("USB: ");
110 result = usb_lowlevel_init();
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200111 /* if lowlevel init is OK, scan the bus for devices
112 * i.e. search HUBs and configure them */
113 if (result == 0) {
wdenkaffae2b2002-08-17 09:36:01 +0000114 printf("scanning bus for devices... ");
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200115 running = 1;
wdenkaffae2b2002-08-17 09:36:01 +0000116 usb_scan_devices();
Bartlomiej Siekae51aae32006-08-03 23:20:13 +0200117 usb_started = 1;
wdenkaffae2b2002-08-17 09:36:01 +0000118 return 0;
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200119 } else {
wdenkaffae2b2002-08-17 09:36:01 +0000120 printf("Error, couldn't init Lowlevel part\n");
Bartlomiej Siekae51aae32006-08-03 23:20:13 +0200121 usb_started = 0;
wdenkaffae2b2002-08-17 09:36:01 +0000122 return -1;
123 }
124}
125
126/******************************************************************************
127 * Stop USB this stops the LowLevel Part and deregisters USB devices.
128 */
129int usb_stop(void)
130{
Remy Bohmereba1f2f2008-08-20 11:22:02 +0200131 int res = 0;
132
133 if (usb_started) {
134 asynch_allowed = 1;
135 usb_started = 0;
136 usb_hub_reset();
137 res = usb_lowlevel_stop();
138 }
139 return res;
wdenkaffae2b2002-08-17 09:36:01 +0000140}
141
142/*
143 * disables the asynch behaviour of the control message. This is used for data
144 * transfers that uses the exclusiv access to the control and bulk messages.
145 */
146void usb_disable_asynch(int disable)
147{
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200148 asynch_allowed = !disable;
wdenkaffae2b2002-08-17 09:36:01 +0000149}
150
151
152/*-------------------------------------------------------------------
153 * Message wrappers.
154 *
155 */
156
157/*
158 * submits an Interrupt Message
159 */
160int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200161 void *buffer, int transfer_len, int interval)
wdenkaffae2b2002-08-17 09:36:01 +0000162{
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200163 return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
wdenkaffae2b2002-08-17 09:36:01 +0000164}
165
166/*
167 * submits a control message and waits for comletion (at least timeout * 1ms)
168 * If timeout is 0, we don't wait for completion (used as example to set and
169 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
170 * allow control messages with 0 timeout, by previousely resetting the flag
171 * asynch_allowed (usb_disable_asynch(1)).
172 * returns the transfered length if OK or -1 if error. The transfered length
173 * and the current status are stored in the dev->act_len and dev->status.
174 */
175int usb_control_msg(struct usb_device *dev, unsigned int pipe,
176 unsigned char request, unsigned char requesttype,
177 unsigned short value, unsigned short index,
178 void *data, unsigned short size, int timeout)
179{
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200180 if ((timeout == 0) && (!asynch_allowed)) {
181 /* request for a asynch control pipe is not allowed */
wdenkaffae2b2002-08-17 09:36:01 +0000182 return -1;
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200183 }
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200184
wdenkaffae2b2002-08-17 09:36:01 +0000185 /* set setup command */
186 setup_packet.requesttype = requesttype;
187 setup_packet.request = request;
Christian Eggersc9182612008-05-21 22:12:00 +0200188 setup_packet.value = cpu_to_le16(value);
189 setup_packet.index = cpu_to_le16(index);
190 setup_packet.length = cpu_to_le16(size);
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200191 USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
192 "value 0x%X index 0x%X length 0x%X\n",
193 request, requesttype, value, index, size);
194 dev->status = USB_ST_NOT_PROC; /*not yet processed */
wdenkaffae2b2002-08-17 09:36:01 +0000195
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200196 submit_control_msg(dev, pipe, data, size, &setup_packet);
197 if (timeout == 0)
wdenkaffae2b2002-08-17 09:36:01 +0000198 return (int)size;
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200199
Remy Bohmer48867202008-10-10 10:23:21 +0200200 if (dev->status != 0) {
201 /*
202 * Let's wait a while for the timeout to elapse.
203 * It has no real use, but it keeps the interface happy.
204 */
205 wait_ms(timeout);
wdenkaffae2b2002-08-17 09:36:01 +0000206 return -1;
Remy Bohmer48867202008-10-10 10:23:21 +0200207 }
208
209 return dev->act_len;
wdenkaffae2b2002-08-17 09:36:01 +0000210}
211
212/*-------------------------------------------------------------------
213 * submits bulk message, and waits for completion. returns 0 if Ok or
214 * -1 if Error.
215 * synchronous behavior
216 */
217int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
218 void *data, int len, int *actual_length, int timeout)
219{
220 if (len < 0)
221 return -1;
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200222 dev->status = USB_ST_NOT_PROC; /*not yet processed */
223 submit_bulk_msg(dev, pipe, data, len);
224 while (timeout--) {
225 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
wdenkaffae2b2002-08-17 09:36:01 +0000226 break;
227 wait_ms(1);
228 }
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200229 *actual_length = dev->act_len;
230 if (dev->status == 0)
wdenkaffae2b2002-08-17 09:36:01 +0000231 return 0;
232 else
233 return -1;
234}
235
236
237/*-------------------------------------------------------------------
238 * Max Packet stuff
239 */
240
241/*
242 * returns the max packet size, depending on the pipe direction and
243 * the configurations values
244 */
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200245int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
wdenkaffae2b2002-08-17 09:36:01 +0000246{
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200247 /* direction is out -> use emaxpacket out */
248 if ((pipe & USB_DIR_IN) == 0)
Michael Trimarchide39f8c2008-11-26 17:41:34 +0100249 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
wdenkaffae2b2002-08-17 09:36:01 +0000250 else
Michael Trimarchide39f8c2008-11-26 17:41:34 +0100251 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
wdenkaffae2b2002-08-17 09:36:01 +0000252}
253
Remy Bohmerbe19d322008-09-16 14:55:42 +0200254/* The routine usb_set_maxpacket_ep() is extracted from the loop of routine
255 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
256 * when it is inlined in 1 single routine. What happens is that the register r3
257 * is used as loop-count 'i', but gets overwritten later on.
258 * This is clearly a compiler bug, but it is easier to workaround it here than
259 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
260 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
261 */
262static void __attribute__((noinline))
263usb_set_maxpacket_ep(struct usb_device *dev, struct usb_endpoint_descriptor *ep)
264{
265 int b;
266
267 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
268
269 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
270 USB_ENDPOINT_XFER_CONTROL) {
271 /* Control => bidirectional */
272 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
Michael Trimarchide39f8c2008-11-26 17:41:34 +0100273 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
Remy Bohmerbe19d322008-09-16 14:55:42 +0200274 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",
275 b, dev->epmaxpacketin[b]);
276 } else {
277 if ((ep->bEndpointAddress & 0x80) == 0) {
278 /* OUT Endpoint */
279 if (ep->wMaxPacketSize > dev->epmaxpacketout[b]) {
280 dev->epmaxpacketout[b] = ep->wMaxPacketSize;
281 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",
282 b, dev->epmaxpacketout[b]);
283 }
284 } else {
285 /* IN Endpoint */
286 if (ep->wMaxPacketSize > dev->epmaxpacketin[b]) {
287 dev->epmaxpacketin[b] = ep->wMaxPacketSize;
288 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",
289 b, dev->epmaxpacketin[b]);
290 }
291 } /* if out */
292 } /* if control */
293}
294
wdenkaffae2b2002-08-17 09:36:01 +0000295/*
296 * set the max packed value of all endpoints in the given configuration
297 */
298int usb_set_maxpacket(struct usb_device *dev)
299{
Remy Bohmerbe19d322008-09-16 14:55:42 +0200300 int i, ii;
wdenkaffae2b2002-08-17 09:36:01 +0000301
Remy Bohmerbe19d322008-09-16 14:55:42 +0200302 for (i = 0; i < dev->config.bNumInterfaces; i++)
303 for (ii = 0; ii < dev->config.if_desc[i].bNumEndpoints; ii++)
304 usb_set_maxpacket_ep(dev,
305 &dev->config.if_desc[i].ep_desc[ii]);
wdenkaffae2b2002-08-17 09:36:01 +0000306
wdenkaffae2b2002-08-17 09:36:01 +0000307 return 0;
308}
309
310/*******************************************************************************
311 * Parse the config, located in buffer, and fills the dev->config structure.
312 * Note that all little/big endian swapping are done automatically.
313 */
314int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno)
315{
316 struct usb_descriptor_header *head;
Bartlomiej Sieka7455af42006-08-02 00:54:18 +0200317 int index, ifno, epno, curr_if_num;
318 int i;
319 unsigned char *ch;
wdenkaffae2b2002-08-17 09:36:01 +0000320
Bartlomiej Sieka7455af42006-08-02 00:54:18 +0200321 ifno = -1;
322 epno = -1;
323 curr_if_num = -1;
324
325 dev->configno = cfgno;
326 head = (struct usb_descriptor_header *) &buffer[0];
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200327 if (head->bDescriptorType != USB_DT_CONFIG) {
328 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
329 head->bDescriptorType);
wdenkaffae2b2002-08-17 09:36:01 +0000330 return -1;
331 }
Bartlomiej Sieka7455af42006-08-02 00:54:18 +0200332 memcpy(&dev->config, buffer, buffer[0]);
Christian Eggersc9182612008-05-21 22:12:00 +0200333 le16_to_cpus(&(dev->config.wTotalLength));
Bartlomiej Sieka7455af42006-08-02 00:54:18 +0200334 dev->config.no_of_if = 0;
wdenkaffae2b2002-08-17 09:36:01 +0000335
Bartlomiej Sieka7455af42006-08-02 00:54:18 +0200336 index = dev->config.bLength;
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200337 /* Ok the first entry must be a configuration entry,
338 * now process the others */
Bartlomiej Sieka7455af42006-08-02 00:54:18 +0200339 head = (struct usb_descriptor_header *) &buffer[index];
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200340 while (index + 1 < dev->config.wTotalLength) {
341 switch (head->bDescriptorType) {
342 case USB_DT_INTERFACE:
343 if (((struct usb_interface_descriptor *) \
344 &buffer[index])->bInterfaceNumber != curr_if_num) {
345 /* this is a new interface, copy new desc */
346 ifno = dev->config.no_of_if;
347 dev->config.no_of_if++;
348 memcpy(&dev->config.if_desc[ifno],
Bartlomiej Sieka7455af42006-08-02 00:54:18 +0200349 &buffer[index], buffer[index]);
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200350 dev->config.if_desc[ifno].no_of_ep = 0;
351 dev->config.if_desc[ifno].num_altsetting = 1;
352 curr_if_num =
353 dev->config.if_desc[ifno].bInterfaceNumber;
354 } else {
355 /* found alternate setting for the interface */
356 dev->config.if_desc[ifno].num_altsetting++;
357 }
358 break;
359 case USB_DT_ENDPOINT:
360 epno = dev->config.if_desc[ifno].no_of_ep;
361 /* found an endpoint */
362 dev->config.if_desc[ifno].no_of_ep++;
363 memcpy(&dev->config.if_desc[ifno].ep_desc[epno],
364 &buffer[index], buffer[index]);
365 le16_to_cpus(&(dev->config.if_desc[ifno].ep_desc[epno].\
366 wMaxPacketSize));
367 USB_PRINTF("if %d, ep %d\n", ifno, epno);
368 break;
369 default:
370 if (head->bLength == 0)
371 return 1;
372
373 USB_PRINTF("unknown Description Type : %x\n",
374 head->bDescriptorType);
375
376 {
377 ch = (unsigned char *)head;
378 for (i = 0; i < head->bLength; i++)
379 USB_PRINTF("%02X ", *ch++);
380 USB_PRINTF("\n\n\n");
381 }
382 break;
wdenkaffae2b2002-08-17 09:36:01 +0000383 }
Bartlomiej Sieka7455af42006-08-02 00:54:18 +0200384 index += head->bLength;
385 head = (struct usb_descriptor_header *)&buffer[index];
wdenkaffae2b2002-08-17 09:36:01 +0000386 }
387 return 1;
388}
389
390/***********************************************************************
391 * Clears an endpoint
392 * endp: endpoint number in bits 0-3;
393 * direction flag in bit 7 (1 = IN, 0 = OUT)
394 */
395int usb_clear_halt(struct usb_device *dev, int pipe)
396{
397 int result;
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200398 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
wdenkaffae2b2002-08-17 09:36:01 +0000399
400 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200401 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
402 endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
wdenkaffae2b2002-08-17 09:36:01 +0000403
404 /* don't clear if failed */
405 if (result < 0)
406 return result;
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200407
Wolfgang Denk095b8a32005-08-02 17:06:17 +0200408 /*
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200409 * NOTE: we do not get status and verify reset was successful
410 * as some devices are reported to lock up upon this check..
411 */
412
wdenkaffae2b2002-08-17 09:36:01 +0000413 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200414
wdenkaffae2b2002-08-17 09:36:01 +0000415 /* toggle is reset on clear */
416 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
417 return 0;
418}
419
420
421/**********************************************************************
422 * get_descriptor type
423 */
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200424int usb_get_descriptor(struct usb_device *dev, unsigned char type,
425 unsigned char index, void *buf, int size)
wdenkaffae2b2002-08-17 09:36:01 +0000426{
427 int res;
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200428 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
wdenkaffae2b2002-08-17 09:36:01 +0000429 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
430 (type << 8) + index, 0,
431 buf, size, USB_CNTL_TIMEOUT);
432 return res;
433}
434
435/**********************************************************************
436 * gets configuration cfgno and store it in the buffer
437 */
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200438int usb_get_configuration_no(struct usb_device *dev,
439 unsigned char *buffer, int cfgno)
wdenkaffae2b2002-08-17 09:36:01 +0000440{
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200441 int result;
wdenkaffae2b2002-08-17 09:36:01 +0000442 unsigned int tmp;
443 struct usb_config_descriptor *config;
444
445
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200446 config = (struct usb_config_descriptor *)&buffer[0];
Remy Bohmer48867202008-10-10 10:23:21 +0200447 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
448 if (result < 9) {
wdenkaffae2b2002-08-17 09:36:01 +0000449 if (result < 0)
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200450 printf("unable to get descriptor, error %lX\n",
451 dev->status);
wdenkaffae2b2002-08-17 09:36:01 +0000452 else
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200453 printf("config descriptor too short " \
Remy Bohmer48867202008-10-10 10:23:21 +0200454 "(expected %i, got %i)\n", 9, result);
wdenkaffae2b2002-08-17 09:36:01 +0000455 return -1;
456 }
Christian Eggersc9182612008-05-21 22:12:00 +0200457 tmp = le16_to_cpu(config->wTotalLength);
wdenkaffae2b2002-08-17 09:36:01 +0000458
wdenkcd0a9de2004-02-23 20:48:38 +0000459 if (tmp > USB_BUFSIZ) {
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200460 USB_PRINTF("usb_get_configuration_no: failed to get " \
461 "descriptor - too long: %d\n", tmp);
wdenkcd0a9de2004-02-23 20:48:38 +0000462 return -1;
463 }
464
wdenkaffae2b2002-08-17 09:36:01 +0000465 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200466 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",
467 cfgno, result, tmp);
wdenkaffae2b2002-08-17 09:36:01 +0000468 return result;
469}
470
471/********************************************************************
472 * set address of a device to the value in dev->devnum.
473 * This can only be done by addressing the device via the default address (0)
474 */
475int usb_set_address(struct usb_device *dev)
476{
477 int res;
478
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200479 USB_PRINTF("set address %d\n", dev->devnum);
480 res = usb_control_msg(dev, usb_snddefctrl(dev),
481 USB_REQ_SET_ADDRESS, 0,
482 (dev->devnum), 0,
483 NULL, 0, USB_CNTL_TIMEOUT);
wdenkaffae2b2002-08-17 09:36:01 +0000484 return res;
485}
486
487/********************************************************************
488 * set interface number to interface
489 */
490int usb_set_interface(struct usb_device *dev, int interface, int alternate)
491{
492 struct usb_interface_descriptor *if_face = NULL;
493 int ret, i;
494
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200495 for (i = 0; i < dev->config.bNumInterfaces; i++) {
wdenkaffae2b2002-08-17 09:36:01 +0000496 if (dev->config.if_desc[i].bInterfaceNumber == interface) {
497 if_face = &dev->config.if_desc[i];
498 break;
499 }
500 }
501 if (!if_face) {
502 printf("selecting invalid interface %d", interface);
503 return -1;
504 }
Bartlomiej Sieka7455af42006-08-02 00:54:18 +0200505 /*
506 * We should return now for devices with only one alternate setting.
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200507 * According to 9.4.10 of the Universal Serial Bus Specification
508 * Revision 2.0 such devices can return with a STALL. This results in
509 * some USB sticks timeouting during initialization and then being
510 * unusable in U-Boot.
Bartlomiej Sieka7455af42006-08-02 00:54:18 +0200511 */
512 if (if_face->num_altsetting == 1)
513 return 0;
wdenkaffae2b2002-08-17 09:36:01 +0000514
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200515 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
516 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
517 alternate, interface, NULL, 0,
518 USB_CNTL_TIMEOUT * 5);
519 if (ret < 0)
wdenkaffae2b2002-08-17 09:36:01 +0000520 return ret;
521
wdenkaffae2b2002-08-17 09:36:01 +0000522 return 0;
523}
524
525/********************************************************************
526 * set configuration number to configuration
527 */
528int usb_set_configuration(struct usb_device *dev, int configuration)
529{
530 int res;
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200531 USB_PRINTF("set configuration %d\n", configuration);
wdenkaffae2b2002-08-17 09:36:01 +0000532 /* set setup command */
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200533 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
534 USB_REQ_SET_CONFIGURATION, 0,
535 configuration, 0,
536 NULL, 0, USB_CNTL_TIMEOUT);
537 if (res == 0) {
wdenkaffae2b2002-08-17 09:36:01 +0000538 dev->toggle[0] = 0;
539 dev->toggle[1] = 0;
540 return 0;
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200541 } else
wdenkaffae2b2002-08-17 09:36:01 +0000542 return -1;
543}
544
545/********************************************************************
546 * set protocol to protocol
547 */
548int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
549{
550 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
551 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
552 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
553}
554
555/********************************************************************
556 * set idle
557 */
558int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
559{
560 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
561 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
562 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
563}
564
565/********************************************************************
566 * get report
567 */
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200568int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
569 unsigned char id, void *buf, int size)
wdenkaffae2b2002-08-17 09:36:01 +0000570{
571 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200572 USB_REQ_GET_REPORT,
573 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
574 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
wdenkaffae2b2002-08-17 09:36:01 +0000575}
576
577/********************************************************************
578 * get class descriptor
579 */
580int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
581 unsigned char type, unsigned char id, void *buf, int size)
582{
583 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
584 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
585 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
586}
587
588/********************************************************************
589 * get string index in buffer
590 */
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200591int usb_get_string(struct usb_device *dev, unsigned short langid,
592 unsigned char index, void *buf, int size)
wdenkaffae2b2002-08-17 09:36:01 +0000593{
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200594 int i;
595 int result;
596
597 for (i = 0; i < 3; ++i) {
598 /* some devices are flaky */
599 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
600 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
Wolfgang Denk095b8a32005-08-02 17:06:17 +0200601 (USB_DT_STRING << 8) + index, langid, buf, size,
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200602 USB_CNTL_TIMEOUT);
603
604 if (result > 0)
605 break;
Wolfgang Denk095b8a32005-08-02 17:06:17 +0200606 }
607
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200608 return result;
wdenkaffae2b2002-08-17 09:36:01 +0000609}
610
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200611
612static void usb_try_string_workarounds(unsigned char *buf, int *length)
613{
614 int newlength, oldlength = *length;
615
616 for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
617 if (!isprint(buf[newlength]) || buf[newlength + 1])
618 break;
619
620 if (newlength > 2) {
621 buf[0] = newlength;
622 *length = newlength;
623 }
624}
625
626
627static int usb_string_sub(struct usb_device *dev, unsigned int langid,
628 unsigned int index, unsigned char *buf)
629{
630 int rc;
631
632 /* Try to read the string descriptor by asking for the maximum
633 * possible number of bytes */
634 rc = usb_get_string(dev, langid, index, buf, 255);
635
636 /* If that failed try to read the descriptor length, then
637 * ask for just that many bytes */
638 if (rc < 2) {
639 rc = usb_get_string(dev, langid, index, buf, 2);
640 if (rc == 2)
641 rc = usb_get_string(dev, langid, index, buf, buf[0]);
642 }
643
644 if (rc >= 2) {
645 if (!buf[0] && !buf[1])
646 usb_try_string_workarounds(buf, &rc);
647
648 /* There might be extra junk at the end of the descriptor */
649 if (buf[0] < rc)
650 rc = buf[0];
651
652 rc = rc - (rc & 1); /* force a multiple of two */
653 }
654
655 if (rc < 2)
Wolfgang Denk095b8a32005-08-02 17:06:17 +0200656 rc = -1;
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200657
658 return rc;
659}
660
661
wdenkaffae2b2002-08-17 09:36:01 +0000662/********************************************************************
663 * usb_string:
664 * Get string index and translate it to ascii.
665 * returns string length (> 0) or error (< 0)
666 */
667int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
668{
wdenkcd0a9de2004-02-23 20:48:38 +0000669 unsigned char mybuf[USB_BUFSIZ];
wdenkaffae2b2002-08-17 09:36:01 +0000670 unsigned char *tbuf;
671 int err;
672 unsigned int u, idx;
673
674 if (size <= 0 || !buf || !index)
675 return -1;
676 buf[0] = 0;
Wolfgang Denkd0ff51b2008-07-14 15:19:07 +0200677 tbuf = &mybuf[0];
wdenkaffae2b2002-08-17 09:36:01 +0000678
679 /* get langid for strings if it's not yet known */
680 if (!dev->have_langid) {
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200681 err = usb_string_sub(dev, 0, 0, tbuf);
wdenkaffae2b2002-08-17 09:36:01 +0000682 if (err < 0) {
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200683 USB_PRINTF("error getting string descriptor 0 " \
Stefan Roesef1c1f542009-01-22 10:11:21 +0100684 "(error=%lx)\n", dev->status);
wdenkaffae2b2002-08-17 09:36:01 +0000685 return -1;
686 } else if (tbuf[0] < 4) {
687 USB_PRINTF("string descriptor 0 too short\n");
688 return -1;
689 } else {
690 dev->have_langid = -1;
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200691 dev->string_langid = tbuf[2] | (tbuf[3] << 8);
wdenkaffae2b2002-08-17 09:36:01 +0000692 /* always use the first langid listed */
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200693 USB_PRINTF("USB device number %d default " \
694 "language ID 0x%x\n",
695 dev->devnum, dev->string_langid);
wdenkaffae2b2002-08-17 09:36:01 +0000696 }
697 }
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200698
699 err = usb_string_sub(dev, dev->string_langid, index, tbuf);
wdenkaffae2b2002-08-17 09:36:01 +0000700 if (err < 0)
701 return err;
wdenkcd0a9de2004-02-23 20:48:38 +0000702
wdenkaffae2b2002-08-17 09:36:01 +0000703 size--; /* leave room for trailing NULL char in output buffer */
704 for (idx = 0, u = 2; u < err; u += 2) {
705 if (idx >= size)
706 break;
707 if (tbuf[u+1]) /* high byte */
708 buf[idx++] = '?'; /* non-ASCII character */
709 else
710 buf[idx++] = tbuf[u];
711 }
712 buf[idx] = 0;
713 err = idx;
714 return err;
715}
716
717
718/********************************************************************
719 * USB device handling:
720 * the USB device are static allocated [USB_MAX_DEVICE].
721 */
722
723
724/* returns a pointer to the device with the index [index].
725 * if the device is not assigned (dev->devnum==-1) returns NULL
726 */
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200727struct usb_device *usb_get_dev_index(int index)
wdenkaffae2b2002-08-17 09:36:01 +0000728{
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200729 if (usb_dev[index].devnum == -1)
wdenkaffae2b2002-08-17 09:36:01 +0000730 return NULL;
731 else
732 return &usb_dev[index];
733}
734
735
736/* returns a pointer of a new device structure or NULL, if
737 * no device struct is available
738 */
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200739struct usb_device *usb_alloc_new_device(void)
wdenkaffae2b2002-08-17 09:36:01 +0000740{
741 int i;
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200742 USB_PRINTF("New Device %d\n", dev_index);
743 if (dev_index == USB_MAX_DEVICE) {
744 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
wdenkaffae2b2002-08-17 09:36:01 +0000745 return NULL;
746 }
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200747 /* default Address is 0, real addresses start with 1 */
748 usb_dev[dev_index].devnum = dev_index + 1;
749 usb_dev[dev_index].maxchild = 0;
750 for (i = 0; i < USB_MAXCHILDREN; i++)
751 usb_dev[dev_index].children[i] = NULL;
752 usb_dev[dev_index].parent = NULL;
wdenkaffae2b2002-08-17 09:36:01 +0000753 dev_index++;
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200754 return &usb_dev[dev_index - 1];
wdenkaffae2b2002-08-17 09:36:01 +0000755}
756
757
758/*
759 * By the time we get here, the device has gotten a new device ID
760 * and is in the default state. We need to identify the thing and
761 * get the ball rolling..
762 *
763 * Returns 0 for success, != 0 for error.
764 */
765int usb_new_device(struct usb_device *dev)
766{
767 int addr, err;
768 int tmp;
wdenkcd0a9de2004-02-23 20:48:38 +0000769 unsigned char tmpbuf[USB_BUFSIZ];
wdenkaffae2b2002-08-17 09:36:01 +0000770
wdenkaffae2b2002-08-17 09:36:01 +0000771 /* We still haven't set the Address yet */
772 addr = dev->devnum;
773 dev->devnum = 0;
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200774
Remy Bohmerc9e84362008-09-16 14:55:44 +0200775#ifdef CONFIG_LEGACY_USB_INIT_SEQ
776 /* this is the old and known way of initializing devices, it is
777 * different than what Windows and Linux are doing. Windows and Linux
778 * both retrieve 64 bytes while reading the device descriptor
779 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
780 * invalid header while reading 8 bytes as device descriptor. */
781 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
Remy Bohmer48867202008-10-10 10:23:21 +0200782 dev->maxpacketsize = PACKET_SIZE_8;
Michael Trimarchide39f8c2008-11-26 17:41:34 +0100783 dev->epmaxpacketin[0] = 8;
Remy Bohmerc9e84362008-09-16 14:55:44 +0200784 dev->epmaxpacketout[0] = 8;
785
786 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
787 if (err < 8) {
788 printf("\n USB device not responding, " \
Michael Trimarchide39f8c2008-11-26 17:41:34 +0100789 "giving up (status=%lX)\n", dev->status);
Remy Bohmerc9e84362008-09-16 14:55:44 +0200790 return 1;
791 }
792#else
Remy Bohmer48867202008-10-10 10:23:21 +0200793 /* This is a Windows scheme of initialization sequence, with double
794 * reset of the device (Linux uses the same sequence)
Remy Bohmerc9e84362008-09-16 14:55:44 +0200795 * Some equipment is said to work only with such init sequence; this
796 * patch is based on the work by Alan Stern:
Michael Trimarchide39f8c2008-11-26 17:41:34 +0100797 * http://sourceforge.net/mailarchive/forum.php?
798 * thread_id=5729457&forum_id=5398
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200799 */
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200800 struct usb_device_descriptor *desc;
801 int port = -1;
802 struct usb_device *parent = dev->parent;
803 unsigned short portstatus;
804
805 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
806 * only 18 bytes long, this will terminate with a short packet. But if
807 * the maxpacket size is 8 or 16 the device may be waiting to transmit
Remy Bohmerc9e84362008-09-16 14:55:44 +0200808 * some more, or keeps on retransmitting the 8 byte header. */
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200809
810 desc = (struct usb_device_descriptor *)tmpbuf;
Remy Bohmerc9e84362008-09-16 14:55:44 +0200811 dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */
Remy Bohmer48867202008-10-10 10:23:21 +0200812 /* Default to 64 byte max packet size */
813 dev->maxpacketsize = PACKET_SIZE_64;
Michael Trimarchide39f8c2008-11-26 17:41:34 +0100814 dev->epmaxpacketin[0] = 64;
Remy Bohmerc9e84362008-09-16 14:55:44 +0200815 dev->epmaxpacketout[0] = 64;
Remy Bohmer48867202008-10-10 10:23:21 +0200816
817 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
818 if (err < 0) {
819 USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n");
820 return 1;
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200821 }
Remy Bohmer48867202008-10-10 10:23:21 +0200822
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200823 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
Wolfgang Denk095b8a32005-08-02 17:06:17 +0200824
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200825 /* find the port number we're at */
826 if (parent) {
Remy Bohmer48867202008-10-10 10:23:21 +0200827 int j;
Wolfgang Denk095b8a32005-08-02 17:06:17 +0200828
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200829 for (j = 0; j < parent->maxchild; j++) {
830 if (parent->children[j] == dev) {
831 port = j;
832 break;
833 }
834 }
835 if (port < 0) {
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200836 printf("usb_new_device:cannot locate device's port.\n");
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200837 return 1;
838 }
839
840 /* reset the port for the second time */
841 err = hub_port_reset(dev->parent, port, &portstatus);
842 if (err < 0) {
843 printf("\n Couldn't reset port %i\n", port);
844 return 1;
845 }
846 }
Wolfgang Denk9c998aa2005-07-21 11:57:57 +0200847#endif
848
Michael Trimarchide39f8c2008-11-26 17:41:34 +0100849 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
wdenkaffae2b2002-08-17 09:36:01 +0000850 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
851 switch (dev->descriptor.bMaxPacketSize0) {
Michael Trimarchide39f8c2008-11-26 17:41:34 +0100852 case 8:
853 dev->maxpacketsize = PACKET_SIZE_8;
854 break;
855 case 16:
856 dev->maxpacketsize = PACKET_SIZE_16;
857 break;
858 case 32:
859 dev->maxpacketsize = PACKET_SIZE_32;
860 break;
861 case 64:
862 dev->maxpacketsize = PACKET_SIZE_64;
863 break;
wdenkaffae2b2002-08-17 09:36:01 +0000864 }
865 dev->devnum = addr;
866
867 err = usb_set_address(dev); /* set address */
868
869 if (err < 0) {
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200870 printf("\n USB device not accepting new address " \
871 "(error=%lX)\n", dev->status);
wdenkaffae2b2002-08-17 09:36:01 +0000872 return 1;
873 }
874
875 wait_ms(10); /* Let the SET_ADDRESS settle */
876
877 tmp = sizeof(dev->descriptor);
878
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200879 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
880 &dev->descriptor, sizeof(dev->descriptor));
wdenkaffae2b2002-08-17 09:36:01 +0000881 if (err < tmp) {
882 if (err < 0)
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200883 printf("unable to get device descriptor (error=%d)\n",
884 err);
wdenkaffae2b2002-08-17 09:36:01 +0000885 else
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200886 printf("USB device descriptor short read " \
887 "(expected %i, got %i)\n", tmp, err);
wdenkaffae2b2002-08-17 09:36:01 +0000888 return 1;
889 }
890 /* correct le values */
Christian Eggersc9182612008-05-21 22:12:00 +0200891 le16_to_cpus(&dev->descriptor.bcdUSB);
892 le16_to_cpus(&dev->descriptor.idVendor);
893 le16_to_cpus(&dev->descriptor.idProduct);
894 le16_to_cpus(&dev->descriptor.bcdDevice);
wdenkaffae2b2002-08-17 09:36:01 +0000895 /* only support for one config for now */
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200896 usb_get_configuration_no(dev, &tmpbuf[0], 0);
897 usb_parse_config(dev, &tmpbuf[0], 0);
wdenkaffae2b2002-08-17 09:36:01 +0000898 usb_set_maxpacket(dev);
899 /* we set the default configuration here */
900 if (usb_set_configuration(dev, dev->config.bConfigurationValue)) {
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200901 printf("failed to set default configuration " \
902 "len %d, status %lX\n", dev->act_len, dev->status);
wdenkaffae2b2002-08-17 09:36:01 +0000903 return -1;
904 }
905 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200906 dev->descriptor.iManufacturer, dev->descriptor.iProduct,
907 dev->descriptor.iSerialNumber);
wdenkaffae2b2002-08-17 09:36:01 +0000908 memset(dev->mf, 0, sizeof(dev->mf));
909 memset(dev->prod, 0, sizeof(dev->prod));
910 memset(dev->serial, 0, sizeof(dev->serial));
911 if (dev->descriptor.iManufacturer)
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200912 usb_string(dev, dev->descriptor.iManufacturer,
913 dev->mf, sizeof(dev->mf));
wdenkaffae2b2002-08-17 09:36:01 +0000914 if (dev->descriptor.iProduct)
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200915 usb_string(dev, dev->descriptor.iProduct,
916 dev->prod, sizeof(dev->prod));
wdenkaffae2b2002-08-17 09:36:01 +0000917 if (dev->descriptor.iSerialNumber)
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200918 usb_string(dev, dev->descriptor.iSerialNumber,
919 dev->serial, sizeof(dev->serial));
wdenkaffae2b2002-08-17 09:36:01 +0000920 USB_PRINTF("Manufacturer %s\n", dev->mf);
921 USB_PRINTF("Product %s\n", dev->prod);
922 USB_PRINTF("SerialNumber %s\n", dev->serial);
923 /* now prode if the device is a hub */
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200924 usb_hub_probe(dev, 0);
wdenkaffae2b2002-08-17 09:36:01 +0000925 return 0;
926}
927
928/* build device Tree */
929void usb_scan_devices(void)
930{
931 int i;
932 struct usb_device *dev;
933
934 /* first make all devices unknown */
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200935 for (i = 0; i < USB_MAX_DEVICE; i++) {
936 memset(&usb_dev[i], 0, sizeof(struct usb_device));
Wolfgang Denkd0ff51b2008-07-14 15:19:07 +0200937 usb_dev[i].devnum = -1;
wdenkaffae2b2002-08-17 09:36:01 +0000938 }
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200939 dev_index = 0;
wdenkaffae2b2002-08-17 09:36:01 +0000940 /* device 0 is always present (root hub, so let it analyze) */
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200941 dev = usb_alloc_new_device();
Bryan Wu1a448db2009-01-18 23:04:27 -0500942 if (usb_new_device(dev))
943 printf("No USB Device found\n");
944 else
945 printf("%d USB Device(s) found\n", dev_index);
wdenkaffae2b2002-08-17 09:36:01 +0000946 /* insert "driver" if possible */
947#ifdef CONFIG_USB_KEYBOARD
948 drv_usb_kbd_init();
949 USB_PRINTF("scan end\n");
950#endif
951}
952
953
954/****************************************************************************
955 * HUB "Driver"
956 * Probes device for being a hub and configurate it
957 */
958
959#undef USB_HUB_DEBUG
960
961#ifdef USB_HUB_DEBUG
Michael Trimarchide39f8c2008-11-26 17:41:34 +0100962#define USB_HUB_PRINTF(fmt, args...) printf(fmt , ##args)
wdenkaffae2b2002-08-17 09:36:01 +0000963#else
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200964#define USB_HUB_PRINTF(fmt, args...)
wdenkaffae2b2002-08-17 09:36:01 +0000965#endif
966
967
968static struct usb_hub_device hub_dev[USB_MAX_HUB];
969static int usb_hub_index;
970
971
972int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
973{
974 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
975 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
976 USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
977}
978
979int usb_clear_hub_feature(struct usb_device *dev, int feature)
980{
981 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200982 USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature,
983 0, NULL, 0, USB_CNTL_TIMEOUT);
wdenkaffae2b2002-08-17 09:36:01 +0000984}
985
986int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
987{
988 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200989 USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
990 port, NULL, 0, USB_CNTL_TIMEOUT);
wdenkaffae2b2002-08-17 09:36:01 +0000991}
992
993int usb_set_port_feature(struct usb_device *dev, int port, int feature)
994{
995 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
Remy Bohmer6f5794a2008-09-16 14:55:43 +0200996 USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
997 port, NULL, 0, USB_CNTL_TIMEOUT);
wdenkaffae2b2002-08-17 09:36:01 +0000998}
999
1000int usb_get_hub_status(struct usb_device *dev, void *data)
1001{
1002 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1003 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
1004 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1005}
1006
1007int usb_get_port_status(struct usb_device *dev, int port, void *data)
1008{
1009 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
1010 USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
1011 data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
1012}
1013
1014
1015static void usb_hub_power_on(struct usb_hub_device *hub)
1016{
1017 int i;
1018 struct usb_device *dev;
1019
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001020 dev = hub->pusb_dev;
wdenkaffae2b2002-08-17 09:36:01 +00001021 /* Enable power to the ports */
1022 USB_HUB_PRINTF("enabling power on all ports\n");
1023 for (i = 0; i < dev->maxchild; i++) {
1024 usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001025 USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status);
wdenkaffae2b2002-08-17 09:36:01 +00001026 wait_ms(hub->desc.bPwrOn2PwrGood * 2);
1027 }
1028}
1029
1030void usb_hub_reset(void)
1031{
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001032 usb_hub_index = 0;
wdenkaffae2b2002-08-17 09:36:01 +00001033}
1034
1035struct usb_hub_device *usb_hub_allocate(void)
1036{
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001037 if (usb_hub_index < USB_MAX_HUB)
wdenkaffae2b2002-08-17 09:36:01 +00001038 return &hub_dev[usb_hub_index++];
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001039
1040 printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
wdenkaffae2b2002-08-17 09:36:01 +00001041 return NULL;
1042}
1043
1044#define MAX_TRIES 5
1045
Stefan Roesef1c1f542009-01-22 10:11:21 +01001046static inline char *portspeed(int portstatus)
1047{
1048 if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED))
1049 return "480 Mb/s";
1050 else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED))
1051 return "1.5 Mb/s";
1052 else
1053 return "12 Mb/s";
1054}
1055
Wolfgang Denk9c998aa2005-07-21 11:57:57 +02001056static int hub_port_reset(struct usb_device *dev, int port,
1057 unsigned short *portstat)
1058{
1059 int tries;
1060 struct usb_port_status portsts;
1061 unsigned short portstatus, portchange;
1062
Wolfgang Denk9c998aa2005-07-21 11:57:57 +02001063 USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port);
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001064 for (tries = 0; tries < MAX_TRIES; tries++) {
Wolfgang Denk9c998aa2005-07-21 11:57:57 +02001065
1066 usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
1067 wait_ms(200);
1068
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001069 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
1070 USB_HUB_PRINTF("get_port_status failed status %lX\n",
1071 dev->status);
Wolfgang Denk9c998aa2005-07-21 11:57:57 +02001072 return -1;
1073 }
Christian Eggersc9182612008-05-21 22:12:00 +02001074 portstatus = le16_to_cpu(portsts.wPortStatus);
1075 portchange = le16_to_cpu(portsts.wPortChange);
Michael Trimarchi366523c2008-12-18 10:05:37 +01001076
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001077 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
1078 portstatus, portchange,
Stefan Roesef1c1f542009-01-22 10:11:21 +01001079 portspeed(portstatus));
Michael Trimarchi366523c2008-12-18 10:05:37 +01001080
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001081 USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
1082 " USB_PORT_STAT_ENABLE %d\n",
Wolfgang Denk9c998aa2005-07-21 11:57:57 +02001083 (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
1084 (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
1085 (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001086
Wolfgang Denk9c998aa2005-07-21 11:57:57 +02001087 if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
1088 !(portstatus & USB_PORT_STAT_CONNECTION))
1089 return -1;
1090
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001091 if (portstatus & USB_PORT_STAT_ENABLE)
Wolfgang Denk9c998aa2005-07-21 11:57:57 +02001092 break;
Wolfgang Denk9c998aa2005-07-21 11:57:57 +02001093
1094 wait_ms(200);
1095 }
1096
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001097 if (tries == MAX_TRIES) {
1098 USB_HUB_PRINTF("Cannot enable port %i after %i retries, " \
1099 "disabling port.\n", port + 1, MAX_TRIES);
Wolfgang Denk9c998aa2005-07-21 11:57:57 +02001100 USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
1101 return -1;
1102 }
1103
1104 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
1105 *portstat = portstatus;
1106 return 0;
Wolfgang Denk9c998aa2005-07-21 11:57:57 +02001107}
1108
1109
wdenkaffae2b2002-08-17 09:36:01 +00001110void usb_hub_port_connect_change(struct usb_device *dev, int port)
1111{
1112 struct usb_device *usb;
1113 struct usb_port_status portsts;
1114 unsigned short portstatus, portchange;
wdenkaffae2b2002-08-17 09:36:01 +00001115
1116 /* Check status */
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001117 if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
wdenkaffae2b2002-08-17 09:36:01 +00001118 USB_HUB_PRINTF("get_port_status failed\n");
1119 return;
1120 }
1121
Christian Eggersc9182612008-05-21 22:12:00 +02001122 portstatus = le16_to_cpu(portsts.wPortStatus);
1123 portchange = le16_to_cpu(portsts.wPortChange);
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001124 USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
Stefan Roesef1c1f542009-01-22 10:11:21 +01001125 portstatus, portchange, portspeed(portstatus));
wdenkaffae2b2002-08-17 09:36:01 +00001126
1127 /* Clear the connection change status */
1128 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
1129
1130 /* Disconnect any existing devices under this port */
1131 if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001132 (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
wdenkaffae2b2002-08-17 09:36:01 +00001133 USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
1134 /* Return now if nothing is connected */
1135 if (!(portstatus & USB_PORT_STAT_CONNECTION))
1136 return;
1137 }
1138 wait_ms(200);
1139
1140 /* Reset the port */
Wolfgang Denk9c998aa2005-07-21 11:57:57 +02001141 if (hub_port_reset(dev, port, &portstatus) < 0) {
1142 printf("cannot reset port %i!?\n", port + 1);
wdenkaffae2b2002-08-17 09:36:01 +00001143 return;
1144 }
1145
wdenkaffae2b2002-08-17 09:36:01 +00001146 wait_ms(200);
1147
1148 /* Allocate a new device struct for it */
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001149 usb = usb_alloc_new_device();
Michael Trimarchi366523c2008-12-18 10:05:37 +01001150
1151 if (portstatus & USB_PORT_STAT_HIGH_SPEED)
1152 usb->speed = USB_SPEED_HIGH;
1153 else if (portstatus & USB_PORT_STAT_LOW_SPEED)
1154 usb->speed = USB_SPEED_LOW;
1155 else
1156 usb->speed = USB_SPEED_FULL;
wdenkaffae2b2002-08-17 09:36:01 +00001157
1158 dev->children[port] = usb;
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001159 usb->parent = dev;
wdenkaffae2b2002-08-17 09:36:01 +00001160 /* Run it through the hoops (find a driver, etc) */
1161 if (usb_new_device(usb)) {
1162 /* Woops, disable the port */
1163 USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
1164 usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
1165 }
1166}
1167
1168
1169int usb_hub_configure(struct usb_device *dev)
1170{
wdenkcd0a9de2004-02-23 20:48:38 +00001171 unsigned char buffer[USB_BUFSIZ], *bitmap;
wdenkaffae2b2002-08-17 09:36:01 +00001172 struct usb_hub_descriptor *descriptor;
1173 struct usb_hub_status *hubsts;
1174 int i;
1175 struct usb_hub_device *hub;
1176
1177 /* "allocate" Hub device */
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001178 hub = usb_hub_allocate();
1179 if (hub == NULL)
wdenkaffae2b2002-08-17 09:36:01 +00001180 return -1;
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001181 hub->pusb_dev = dev;
wdenkaffae2b2002-08-17 09:36:01 +00001182 /* Get the the hub descriptor */
1183 if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001184 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1185 "descriptor, giving up %lX\n", dev->status);
wdenkaffae2b2002-08-17 09:36:01 +00001186 return -1;
1187 }
1188 descriptor = (struct usb_hub_descriptor *)buffer;
wdenkcd0a9de2004-02-23 20:48:38 +00001189
wdenke86e5a02004-10-17 21:12:06 +00001190 /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
1191 i = descriptor->bLength;
1192 if (i > USB_BUFSIZ) {
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001193 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1194 "descriptor - too long: %d\n",
1195 descriptor->bLength);
wdenkcd0a9de2004-02-23 20:48:38 +00001196 return -1;
1197 }
1198
wdenkaffae2b2002-08-17 09:36:01 +00001199 if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001200 USB_HUB_PRINTF("usb_hub_configure: failed to get hub " \
1201 "descriptor 2nd giving up %lX\n", dev->status);
wdenkaffae2b2002-08-17 09:36:01 +00001202 return -1;
1203 }
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001204 memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
wdenkaffae2b2002-08-17 09:36:01 +00001205 /* adjust 16bit values */
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001206 hub->desc.wHubCharacteristics =
1207 le16_to_cpu(descriptor->wHubCharacteristics);
wdenkaffae2b2002-08-17 09:36:01 +00001208 /* set the bitmap */
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001209 bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
1210 /* devices not removable by default */
1211 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
1212 bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
1213 memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
1214
1215 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1216 hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
1217
1218 for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
1219 hub->desc.DeviceRemovable[i] = descriptor->PortPowerCtrlMask[i];
1220
wdenkaffae2b2002-08-17 09:36:01 +00001221 dev->maxchild = descriptor->bNbrPorts;
1222 USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
1223
1224 switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001225 case 0x00:
1226 USB_HUB_PRINTF("ganged power switching\n");
1227 break;
1228 case 0x01:
1229 USB_HUB_PRINTF("individual port power switching\n");
1230 break;
1231 case 0x02:
1232 case 0x03:
1233 USB_HUB_PRINTF("unknown reserved power switching mode\n");
1234 break;
wdenkaffae2b2002-08-17 09:36:01 +00001235 }
1236
1237 if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
1238 USB_HUB_PRINTF("part of a compound device\n");
1239 else
1240 USB_HUB_PRINTF("standalone hub\n");
1241
1242 switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001243 case 0x00:
1244 USB_HUB_PRINTF("global over-current protection\n");
1245 break;
1246 case 0x08:
1247 USB_HUB_PRINTF("individual port over-current protection\n");
1248 break;
1249 case 0x10:
1250 case 0x18:
1251 USB_HUB_PRINTF("no over-current protection\n");
1252 break;
wdenkaffae2b2002-08-17 09:36:01 +00001253 }
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001254
1255 USB_HUB_PRINTF("power on to power good time: %dms\n",
1256 descriptor->bPwrOn2PwrGood * 2);
1257 USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
1258 descriptor->bHubContrCurrent);
1259
wdenkaffae2b2002-08-17 09:36:01 +00001260 for (i = 0; i < dev->maxchild; i++)
1261 USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001262 hub->desc.DeviceRemovable[(i + 1) / 8] & \
1263 (1 << ((i + 1) % 8)) ? " not" : "");
1264
wdenkcd0a9de2004-02-23 20:48:38 +00001265 if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001266 USB_HUB_PRINTF("usb_hub_configure: failed to get Status - " \
1267 "too long: %d\n", descriptor->bLength);
wdenkcd0a9de2004-02-23 20:48:38 +00001268 return -1;
1269 }
1270
wdenkaffae2b2002-08-17 09:36:01 +00001271 if (usb_get_hub_status(dev, buffer) < 0) {
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001272 USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",
1273 dev->status);
wdenkaffae2b2002-08-17 09:36:01 +00001274 return -1;
1275 }
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001276
wdenkaffae2b2002-08-17 09:36:01 +00001277 hubsts = (struct usb_hub_status *)buffer;
1278 USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001279 le16_to_cpu(hubsts->wHubStatus),
1280 le16_to_cpu(hubsts->wHubChange));
wdenkaffae2b2002-08-17 09:36:01 +00001281 USB_HUB_PRINTF("local power source is %s\n",
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001282 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
1283 "lost (inactive)" : "good");
wdenkaffae2b2002-08-17 09:36:01 +00001284 USB_HUB_PRINTF("%sover-current condition exists\n",
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001285 (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
1286 "" : "no ");
wdenkaffae2b2002-08-17 09:36:01 +00001287 usb_hub_power_on(hub);
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001288
wdenkaffae2b2002-08-17 09:36:01 +00001289 for (i = 0; i < dev->maxchild; i++) {
1290 struct usb_port_status portsts;
1291 unsigned short portstatus, portchange;
1292
1293 if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
1294 USB_HUB_PRINTF("get_port_status failed\n");
1295 continue;
1296 }
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001297
Christian Eggersc9182612008-05-21 22:12:00 +02001298 portstatus = le16_to_cpu(portsts.wPortStatus);
1299 portchange = le16_to_cpu(portsts.wPortChange);
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001300 USB_HUB_PRINTF("Port %d Status %X Change %X\n",
1301 i + 1, portstatus, portchange);
1302
wdenkaffae2b2002-08-17 09:36:01 +00001303 if (portchange & USB_PORT_STAT_C_CONNECTION) {
1304 USB_HUB_PRINTF("port %d connection change\n", i + 1);
1305 usb_hub_port_connect_change(dev, i);
1306 }
1307 if (portchange & USB_PORT_STAT_C_ENABLE) {
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001308 USB_HUB_PRINTF("port %d enable change, status %x\n",
1309 i + 1, portstatus);
1310 usb_clear_port_feature(dev, i + 1,
1311 USB_PORT_FEAT_C_ENABLE);
wdenkaffae2b2002-08-17 09:36:01 +00001312
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001313 /* EM interference sometimes causes bad shielded USB
1314 * devices to be shutdown by the hub, this hack enables
1315 * them again. Works at least with mouse driver */
wdenkaffae2b2002-08-17 09:36:01 +00001316 if (!(portstatus & USB_PORT_STAT_ENABLE) &&
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001317 (portstatus & USB_PORT_STAT_CONNECTION) &&
1318 ((dev->children[i]))) {
1319 USB_HUB_PRINTF("already running port %i " \
1320 "disabled by hub (EMI?), " \
1321 "re-enabling...\n", i + 1);
wdenkaffae2b2002-08-17 09:36:01 +00001322 usb_hub_port_connect_change(dev, i);
1323 }
1324 }
1325 if (portstatus & USB_PORT_STAT_SUSPEND) {
1326 USB_HUB_PRINTF("port %d suspend change\n", i + 1);
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001327 usb_clear_port_feature(dev, i + 1,
1328 USB_PORT_FEAT_SUSPEND);
wdenkaffae2b2002-08-17 09:36:01 +00001329 }
1330
1331 if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
1332 USB_HUB_PRINTF("port %d over-current change\n", i + 1);
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001333 usb_clear_port_feature(dev, i + 1,
1334 USB_PORT_FEAT_C_OVER_CURRENT);
wdenkaffae2b2002-08-17 09:36:01 +00001335 usb_hub_power_on(hub);
1336 }
1337
1338 if (portchange & USB_PORT_STAT_C_RESET) {
1339 USB_HUB_PRINTF("port %d reset change\n", i + 1);
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001340 usb_clear_port_feature(dev, i + 1,
1341 USB_PORT_FEAT_C_RESET);
wdenkaffae2b2002-08-17 09:36:01 +00001342 }
1343 } /* end for i all ports */
1344
1345 return 0;
1346}
1347
1348int usb_hub_probe(struct usb_device *dev, int ifnum)
1349{
1350 struct usb_interface_descriptor *iface;
1351 struct usb_endpoint_descriptor *ep;
1352 int ret;
1353
1354 iface = &dev->config.if_desc[ifnum];
1355 /* Is it a hub? */
1356 if (iface->bInterfaceClass != USB_CLASS_HUB)
1357 return 0;
1358 /* Some hubs have a subclass of 1, which AFAICT according to the */
1359 /* specs is not defined, but it works */
1360 if ((iface->bInterfaceSubClass != 0) &&
1361 (iface->bInterfaceSubClass != 1))
1362 return 0;
1363 /* Multiple endpoints? What kind of mutant ninja-hub is this? */
1364 if (iface->bNumEndpoints != 1)
1365 return 0;
1366 ep = &iface->ep_desc[0];
1367 /* Output endpoint? Curiousier and curiousier.. */
1368 if (!(ep->bEndpointAddress & USB_DIR_IN))
1369 return 0;
1370 /* If it's not an interrupt endpoint, we'd better punt! */
1371 if ((ep->bmAttributes & 3) != 3)
1372 return 0;
1373 /* We found a hub */
1374 USB_HUB_PRINTF("USB hub found\n");
Remy Bohmer6f5794a2008-09-16 14:55:43 +02001375 ret = usb_hub_configure(dev);
wdenkaffae2b2002-08-17 09:36:01 +00001376 return ret;
1377}
1378
wdenkaffae2b2002-08-17 09:36:01 +00001379/* EOF */