2 * Most of this source has been derived from the Linux USB
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)
15 * (C) Copyright 2001 Denis Peter, MPL AG Switzerland
17 * SPDX-License-Identifier: GPL-2.0+
23 * Since this is a bootloader, the devices will not be automatic
24 * (re)configured on hotplug, but after a restart of the USB the
27 * For each transfer (except "Interrupt") we wait for completion.
31 #include <asm/processor.h>
32 #include <linux/compiler.h>
33 #include <linux/ctype.h>
34 #include <asm/byteorder.h>
35 #include <asm/unaligned.h>
39 #include <asm/4xx_pci.h>
42 #define USB_BUFSIZ 512
44 static struct usb_device usb_dev
[USB_MAX_DEVICE
];
46 static int asynch_allowed
;
48 char usb_started
; /* flag for the started/stopped USB status */
50 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
51 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1
54 /***************************************************************************
60 struct usb_device
*dev
;
61 int i
, start_index
= 0;
68 /* first make all devices unknown */
69 for (i
= 0; i
< USB_MAX_DEVICE
; i
++) {
70 memset(&usb_dev
[i
], 0, sizeof(struct usb_device
));
71 usb_dev
[i
].devnum
= -1;
74 /* init low_level USB */
75 for (i
= 0; i
< CONFIG_USB_MAX_CONTROLLER_COUNT
; i
++) {
76 /* init low_level USB */
78 ret
= usb_lowlevel_init(i
, USB_INIT_HOST
, &ctrl
);
79 if (ret
== -ENODEV
) { /* No such device. */
80 puts("Port not available.\n");
84 if (ret
) { /* Other error. */
85 puts("lowlevel init failed\n");
89 * lowlevel init is OK, now scan the bus for devices
90 * i.e. search HUBs and configure them
92 start_index
= dev_index
;
93 printf("scanning bus %d for devices... ", i
);
94 dev
= usb_alloc_new_device(ctrl
);
96 * device 0 is always present
97 * (root hub, so let it analyze)
102 if (start_index
== dev_index
)
103 puts("No USB Device found\n");
105 printf("%d USB Device(s) found\n",
106 dev_index
- start_index
);
112 /* if we were not able to find at least one working bus, bail out */
114 puts("USB error: all controllers failed lowlevel init\n");
121 /******************************************************************************
122 * Stop USB this stops the LowLevel Part and deregisters USB devices.
133 for (i
= 0; i
< CONFIG_USB_MAX_CONTROLLER_COUNT
; i
++) {
134 if (usb_lowlevel_stop(i
))
135 printf("failed to stop USB controller %d\n", i
);
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 * Returns the old value so it can be restored later.
147 int usb_disable_asynch(int disable
)
149 int old_value
= asynch_allowed
;
151 asynch_allowed
= !disable
;
156 /*-------------------------------------------------------------------
162 * submits an Interrupt Message
164 int usb_submit_int_msg(struct usb_device
*dev
, unsigned long pipe
,
165 void *buffer
, int transfer_len
, int interval
)
167 return submit_int_msg(dev
, pipe
, buffer
, transfer_len
, interval
);
171 * submits a control message and waits for comletion (at least timeout * 1ms)
172 * If timeout is 0, we don't wait for completion (used as example to set and
173 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
174 * allow control messages with 0 timeout, by previousely resetting the flag
175 * asynch_allowed (usb_disable_asynch(1)).
176 * returns the transfered length if OK or -1 if error. The transfered length
177 * and the current status are stored in the dev->act_len and dev->status.
179 int usb_control_msg(struct usb_device
*dev
, unsigned int pipe
,
180 unsigned char request
, unsigned char requesttype
,
181 unsigned short value
, unsigned short index
,
182 void *data
, unsigned short size
, int timeout
)
184 ALLOC_CACHE_ALIGN_BUFFER(struct devrequest
, setup_packet
, 1);
186 if ((timeout
== 0) && (!asynch_allowed
)) {
187 /* request for a asynch control pipe is not allowed */
191 /* set setup command */
192 setup_packet
->requesttype
= requesttype
;
193 setup_packet
->request
= request
;
194 setup_packet
->value
= cpu_to_le16(value
);
195 setup_packet
->index
= cpu_to_le16(index
);
196 setup_packet
->length
= cpu_to_le16(size
);
197 debug("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
198 "value 0x%X index 0x%X length 0x%X\n",
199 request
, requesttype
, value
, index
, size
);
200 dev
->status
= USB_ST_NOT_PROC
; /*not yet processed */
202 if (submit_control_msg(dev
, pipe
, data
, size
, setup_packet
) < 0)
208 * Wait for status to update until timeout expires, USB driver
209 * interrupt handler may set the status when the USB operation has
213 if (!((volatile unsigned long)dev
->status
& USB_ST_NOT_PROC
))
224 /*-------------------------------------------------------------------
225 * submits bulk message, and waits for completion. returns 0 if Ok or
227 * synchronous behavior
229 int usb_bulk_msg(struct usb_device
*dev
, unsigned int pipe
,
230 void *data
, int len
, int *actual_length
, int timeout
)
234 dev
->status
= USB_ST_NOT_PROC
; /*not yet processed */
235 if (submit_bulk_msg(dev
, pipe
, data
, len
) < 0)
238 if (!((volatile unsigned long)dev
->status
& USB_ST_NOT_PROC
))
242 *actual_length
= dev
->act_len
;
243 if (dev
->status
== 0)
250 /*-------------------------------------------------------------------
255 * returns the max packet size, depending on the pipe direction and
256 * the configurations values
258 int usb_maxpacket(struct usb_device
*dev
, unsigned long pipe
)
260 /* direction is out -> use emaxpacket out */
261 if ((pipe
& USB_DIR_IN
) == 0)
262 return dev
->epmaxpacketout
[((pipe
>>15) & 0xf)];
264 return dev
->epmaxpacketin
[((pipe
>>15) & 0xf)];
268 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
269 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
270 * when it is inlined in 1 single routine. What happens is that the register r3
271 * is used as loop-count 'i', but gets overwritten later on.
272 * This is clearly a compiler bug, but it is easier to workaround it here than
273 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
274 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
276 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
279 usb_set_maxpacket_ep(struct usb_device
*dev
, int if_idx
, int ep_idx
)
282 struct usb_endpoint_descriptor
*ep
;
283 u16 ep_wMaxPacketSize
;
285 ep
= &dev
->config
.if_desc
[if_idx
].ep_desc
[ep_idx
];
287 b
= ep
->bEndpointAddress
& USB_ENDPOINT_NUMBER_MASK
;
288 ep_wMaxPacketSize
= get_unaligned(&ep
->wMaxPacketSize
);
290 if ((ep
->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) ==
291 USB_ENDPOINT_XFER_CONTROL
) {
292 /* Control => bidirectional */
293 dev
->epmaxpacketout
[b
] = ep_wMaxPacketSize
;
294 dev
->epmaxpacketin
[b
] = ep_wMaxPacketSize
;
295 debug("##Control EP epmaxpacketout/in[%d] = %d\n",
296 b
, dev
->epmaxpacketin
[b
]);
298 if ((ep
->bEndpointAddress
& 0x80) == 0) {
300 if (ep_wMaxPacketSize
> dev
->epmaxpacketout
[b
]) {
301 dev
->epmaxpacketout
[b
] = ep_wMaxPacketSize
;
302 debug("##EP epmaxpacketout[%d] = %d\n",
303 b
, dev
->epmaxpacketout
[b
]);
307 if (ep_wMaxPacketSize
> dev
->epmaxpacketin
[b
]) {
308 dev
->epmaxpacketin
[b
] = ep_wMaxPacketSize
;
309 debug("##EP epmaxpacketin[%d] = %d\n",
310 b
, dev
->epmaxpacketin
[b
]);
317 * set the max packed value of all endpoints in the given configuration
319 static int usb_set_maxpacket(struct usb_device
*dev
)
323 for (i
= 0; i
< dev
->config
.desc
.bNumInterfaces
; i
++)
324 for (ii
= 0; ii
< dev
->config
.if_desc
[i
].desc
.bNumEndpoints
; ii
++)
325 usb_set_maxpacket_ep(dev
, i
, ii
);
330 /*******************************************************************************
331 * Parse the config, located in buffer, and fills the dev->config structure.
332 * Note that all little/big endian swapping are done automatically.
333 * (wTotalLength has already been swapped and sanitized when it was read.)
335 static int usb_parse_config(struct usb_device
*dev
,
336 unsigned char *buffer
, int cfgno
)
338 struct usb_descriptor_header
*head
;
339 int index
, ifno
, epno
, curr_if_num
;
340 u16 ep_wMaxPacketSize
;
341 struct usb_interface
*if_desc
= NULL
;
347 dev
->configno
= cfgno
;
348 head
= (struct usb_descriptor_header
*) &buffer
[0];
349 if (head
->bDescriptorType
!= USB_DT_CONFIG
) {
350 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
351 head
->bDescriptorType
);
354 if (head
->bLength
!= USB_DT_CONFIG_SIZE
) {
355 printf("ERROR: Invalid USB CFG length (%d)\n", head
->bLength
);
358 memcpy(&dev
->config
, head
, USB_DT_CONFIG_SIZE
);
359 dev
->config
.no_of_if
= 0;
361 index
= dev
->config
.desc
.bLength
;
362 /* Ok the first entry must be a configuration entry,
363 * now process the others */
364 head
= (struct usb_descriptor_header
*) &buffer
[index
];
365 while (index
+ 1 < dev
->config
.desc
.wTotalLength
&& head
->bLength
) {
366 switch (head
->bDescriptorType
) {
367 case USB_DT_INTERFACE
:
368 if (head
->bLength
!= USB_DT_INTERFACE_SIZE
) {
369 printf("ERROR: Invalid USB IF length (%d)\n",
373 if (index
+ USB_DT_INTERFACE_SIZE
>
374 dev
->config
.desc
.wTotalLength
) {
375 puts("USB IF descriptor overflowed buffer!\n");
378 if (((struct usb_interface_descriptor
*) \
379 head
)->bInterfaceNumber
!= curr_if_num
) {
380 /* this is a new interface, copy new desc */
381 ifno
= dev
->config
.no_of_if
;
382 if (ifno
>= USB_MAXINTERFACES
) {
383 puts("Too many USB interfaces!\n");
384 /* try to go on with what we have */
387 if_desc
= &dev
->config
.if_desc
[ifno
];
388 dev
->config
.no_of_if
++;
389 memcpy(if_desc
, head
,
390 USB_DT_INTERFACE_SIZE
);
391 if_desc
->no_of_ep
= 0;
392 if_desc
->num_altsetting
= 1;
394 if_desc
->desc
.bInterfaceNumber
;
396 /* found alternate setting for the interface */
398 if_desc
= &dev
->config
.if_desc
[ifno
];
399 if_desc
->num_altsetting
++;
403 case USB_DT_ENDPOINT
:
404 if (head
->bLength
!= USB_DT_ENDPOINT_SIZE
) {
405 printf("ERROR: Invalid USB EP length (%d)\n",
409 if (index
+ USB_DT_ENDPOINT_SIZE
>
410 dev
->config
.desc
.wTotalLength
) {
411 puts("USB EP descriptor overflowed buffer!\n");
415 puts("Endpoint descriptor out of order!\n");
418 epno
= dev
->config
.if_desc
[ifno
].no_of_ep
;
419 if_desc
= &dev
->config
.if_desc
[ifno
];
420 if (epno
> USB_MAXENDPOINTS
) {
421 printf("Interface %d has too many endpoints!\n",
422 if_desc
->desc
.bInterfaceNumber
);
425 /* found an endpoint */
427 memcpy(&if_desc
->ep_desc
[epno
], head
,
428 USB_DT_ENDPOINT_SIZE
);
429 ep_wMaxPacketSize
= get_unaligned(&dev
->config
.\
433 put_unaligned(le16_to_cpu(ep_wMaxPacketSize
),
438 debug("if %d, ep %d\n", ifno
, epno
);
440 case USB_DT_SS_ENDPOINT_COMP
:
441 if (head
->bLength
!= USB_DT_SS_EP_COMP_SIZE
) {
442 printf("ERROR: Invalid USB EPC length (%d)\n",
446 if (index
+ USB_DT_SS_EP_COMP_SIZE
>
447 dev
->config
.desc
.wTotalLength
) {
448 puts("USB EPC descriptor overflowed buffer!\n");
451 if (ifno
< 0 || epno
< 0) {
452 puts("EPC descriptor out of order!\n");
455 if_desc
= &dev
->config
.if_desc
[ifno
];
456 memcpy(&if_desc
->ss_ep_comp_desc
[epno
], head
,
457 USB_DT_SS_EP_COMP_SIZE
);
460 if (head
->bLength
== 0)
463 debug("unknown Description Type : %x\n",
464 head
->bDescriptorType
);
468 unsigned char *ch
= (unsigned char *)head
;
471 for (i
= 0; i
< head
->bLength
; i
++)
472 debug("%02X ", *ch
++);
478 index
+= head
->bLength
;
479 head
= (struct usb_descriptor_header
*)&buffer
[index
];
484 /***********************************************************************
486 * endp: endpoint number in bits 0-3;
487 * direction flag in bit 7 (1 = IN, 0 = OUT)
489 int usb_clear_halt(struct usb_device
*dev
, int pipe
)
492 int endp
= usb_pipeendpoint(pipe
)|(usb_pipein(pipe
)<<7);
494 result
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
495 USB_REQ_CLEAR_FEATURE
, USB_RECIP_ENDPOINT
, 0,
496 endp
, NULL
, 0, USB_CNTL_TIMEOUT
* 3);
498 /* don't clear if failed */
503 * NOTE: we do not get status and verify reset was successful
504 * as some devices are reported to lock up upon this check..
507 usb_endpoint_running(dev
, usb_pipeendpoint(pipe
), usb_pipeout(pipe
));
509 /* toggle is reset on clear */
510 usb_settoggle(dev
, usb_pipeendpoint(pipe
), usb_pipeout(pipe
), 0);
515 /**********************************************************************
516 * get_descriptor type
518 static int usb_get_descriptor(struct usb_device
*dev
, unsigned char type
,
519 unsigned char index
, void *buf
, int size
)
522 res
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
523 USB_REQ_GET_DESCRIPTOR
, USB_DIR_IN
,
524 (type
<< 8) + index
, 0,
525 buf
, size
, USB_CNTL_TIMEOUT
);
529 /**********************************************************************
530 * gets configuration cfgno and store it in the buffer
532 int usb_get_configuration_no(struct usb_device
*dev
,
533 unsigned char *buffer
, int cfgno
)
537 struct usb_config_descriptor
*config
;
539 config
= (struct usb_config_descriptor
*)&buffer
[0];
540 result
= usb_get_descriptor(dev
, USB_DT_CONFIG
, cfgno
, buffer
, 9);
543 printf("unable to get descriptor, error %lX\n",
546 printf("config descriptor too short " \
547 "(expected %i, got %i)\n", 9, result
);
550 length
= le16_to_cpu(config
->wTotalLength
);
552 if (length
> USB_BUFSIZ
) {
553 printf("%s: failed to get descriptor - too long: %d\n",
558 result
= usb_get_descriptor(dev
, USB_DT_CONFIG
, cfgno
, buffer
, length
);
559 debug("get_conf_no %d Result %d, wLength %d\n", cfgno
, result
, length
);
560 config
->wTotalLength
= length
; /* validated, with CPU byte order */
565 /********************************************************************
566 * set address of a device to the value in dev->devnum.
567 * This can only be done by addressing the device via the default address (0)
569 static int usb_set_address(struct usb_device
*dev
)
573 debug("set address %d\n", dev
->devnum
);
574 res
= usb_control_msg(dev
, usb_snddefctrl(dev
),
575 USB_REQ_SET_ADDRESS
, 0,
577 NULL
, 0, USB_CNTL_TIMEOUT
);
581 /********************************************************************
582 * set interface number to interface
584 int usb_set_interface(struct usb_device
*dev
, int interface
, int alternate
)
586 struct usb_interface
*if_face
= NULL
;
589 for (i
= 0; i
< dev
->config
.desc
.bNumInterfaces
; i
++) {
590 if (dev
->config
.if_desc
[i
].desc
.bInterfaceNumber
== interface
) {
591 if_face
= &dev
->config
.if_desc
[i
];
596 printf("selecting invalid interface %d", interface
);
600 * We should return now for devices with only one alternate setting.
601 * According to 9.4.10 of the Universal Serial Bus Specification
602 * Revision 2.0 such devices can return with a STALL. This results in
603 * some USB sticks timeouting during initialization and then being
604 * unusable in U-Boot.
606 if (if_face
->num_altsetting
== 1)
609 ret
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
610 USB_REQ_SET_INTERFACE
, USB_RECIP_INTERFACE
,
611 alternate
, interface
, NULL
, 0,
612 USB_CNTL_TIMEOUT
* 5);
619 /********************************************************************
620 * set configuration number to configuration
622 static int usb_set_configuration(struct usb_device
*dev
, int configuration
)
625 debug("set configuration %d\n", configuration
);
626 /* set setup command */
627 res
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
628 USB_REQ_SET_CONFIGURATION
, 0,
630 NULL
, 0, USB_CNTL_TIMEOUT
);
639 /********************************************************************
640 * set protocol to protocol
642 int usb_set_protocol(struct usb_device
*dev
, int ifnum
, int protocol
)
644 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
645 USB_REQ_SET_PROTOCOL
, USB_TYPE_CLASS
| USB_RECIP_INTERFACE
,
646 protocol
, ifnum
, NULL
, 0, USB_CNTL_TIMEOUT
);
649 /********************************************************************
652 int usb_set_idle(struct usb_device
*dev
, int ifnum
, int duration
, int report_id
)
654 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
655 USB_REQ_SET_IDLE
, USB_TYPE_CLASS
| USB_RECIP_INTERFACE
,
656 (duration
<< 8) | report_id
, ifnum
, NULL
, 0, USB_CNTL_TIMEOUT
);
659 /********************************************************************
662 int usb_get_report(struct usb_device
*dev
, int ifnum
, unsigned char type
,
663 unsigned char id
, void *buf
, int size
)
665 return usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
667 USB_DIR_IN
| USB_TYPE_CLASS
| USB_RECIP_INTERFACE
,
668 (type
<< 8) + id
, ifnum
, buf
, size
, USB_CNTL_TIMEOUT
);
671 /********************************************************************
672 * get class descriptor
674 int usb_get_class_descriptor(struct usb_device
*dev
, int ifnum
,
675 unsigned char type
, unsigned char id
, void *buf
, int size
)
677 return usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
678 USB_REQ_GET_DESCRIPTOR
, USB_RECIP_INTERFACE
| USB_DIR_IN
,
679 (type
<< 8) + id
, ifnum
, buf
, size
, USB_CNTL_TIMEOUT
);
682 /********************************************************************
683 * get string index in buffer
685 static int usb_get_string(struct usb_device
*dev
, unsigned short langid
,
686 unsigned char index
, void *buf
, int size
)
691 for (i
= 0; i
< 3; ++i
) {
692 /* some devices are flaky */
693 result
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
694 USB_REQ_GET_DESCRIPTOR
, USB_DIR_IN
,
695 (USB_DT_STRING
<< 8) + index
, langid
, buf
, size
,
706 static void usb_try_string_workarounds(unsigned char *buf
, int *length
)
708 int newlength
, oldlength
= *length
;
710 for (newlength
= 2; newlength
+ 1 < oldlength
; newlength
+= 2)
711 if (!isprint(buf
[newlength
]) || buf
[newlength
+ 1])
721 static int usb_string_sub(struct usb_device
*dev
, unsigned int langid
,
722 unsigned int index
, unsigned char *buf
)
726 /* Try to read the string descriptor by asking for the maximum
727 * possible number of bytes */
728 rc
= usb_get_string(dev
, langid
, index
, buf
, 255);
730 /* If that failed try to read the descriptor length, then
731 * ask for just that many bytes */
733 rc
= usb_get_string(dev
, langid
, index
, buf
, 2);
735 rc
= usb_get_string(dev
, langid
, index
, buf
, buf
[0]);
739 if (!buf
[0] && !buf
[1])
740 usb_try_string_workarounds(buf
, &rc
);
742 /* There might be extra junk at the end of the descriptor */
746 rc
= rc
- (rc
& 1); /* force a multiple of two */
756 /********************************************************************
758 * Get string index and translate it to ascii.
759 * returns string length (> 0) or error (< 0)
761 int usb_string(struct usb_device
*dev
, int index
, char *buf
, size_t size
)
763 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf
, USB_BUFSIZ
);
768 if (size
<= 0 || !buf
|| !index
)
773 /* get langid for strings if it's not yet known */
774 if (!dev
->have_langid
) {
775 err
= usb_string_sub(dev
, 0, 0, tbuf
);
777 debug("error getting string descriptor 0 " \
778 "(error=%lx)\n", dev
->status
);
780 } else if (tbuf
[0] < 4) {
781 debug("string descriptor 0 too short\n");
784 dev
->have_langid
= -1;
785 dev
->string_langid
= tbuf
[2] | (tbuf
[3] << 8);
786 /* always use the first langid listed */
787 debug("USB device number %d default " \
788 "language ID 0x%x\n",
789 dev
->devnum
, dev
->string_langid
);
793 err
= usb_string_sub(dev
, dev
->string_langid
, index
, tbuf
);
797 size
--; /* leave room for trailing NULL char in output buffer */
798 for (idx
= 0, u
= 2; u
< err
; u
+= 2) {
801 if (tbuf
[u
+1]) /* high byte */
802 buf
[idx
++] = '?'; /* non-ASCII character */
804 buf
[idx
++] = tbuf
[u
];
812 /********************************************************************
813 * USB device handling:
814 * the USB device are static allocated [USB_MAX_DEVICE].
818 /* returns a pointer to the device with the index [index].
819 * if the device is not assigned (dev->devnum==-1) returns NULL
821 struct usb_device
*usb_get_dev_index(int index
)
823 if (usb_dev
[index
].devnum
== -1)
826 return &usb_dev
[index
];
829 /* returns a pointer of a new device structure or NULL, if
830 * no device struct is available
832 struct usb_device
*usb_alloc_new_device(void *controller
)
835 debug("New Device %d\n", dev_index
);
836 if (dev_index
== USB_MAX_DEVICE
) {
837 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE
);
840 /* default Address is 0, real addresses start with 1 */
841 usb_dev
[dev_index
].devnum
= dev_index
+ 1;
842 usb_dev
[dev_index
].maxchild
= 0;
843 for (i
= 0; i
< USB_MAXCHILDREN
; i
++)
844 usb_dev
[dev_index
].children
[i
] = NULL
;
845 usb_dev
[dev_index
].parent
= NULL
;
846 usb_dev
[dev_index
].controller
= controller
;
848 return &usb_dev
[dev_index
- 1];
852 * Free the newly created device node.
853 * Called in error cases where configuring a newly attached
854 * device fails for some reason.
856 void usb_free_device(void)
859 debug("Freeing device node: %d\n", dev_index
);
860 memset(&usb_dev
[dev_index
], 0, sizeof(struct usb_device
));
861 usb_dev
[dev_index
].devnum
= -1;
865 * XHCI issues Enable Slot command and thereafter
866 * allocates device contexts. Provide a weak alias
867 * function for the purpose, so that XHCI overrides it
868 * and EHCI/OHCI just work out of the box.
870 __weak
int usb_alloc_device(struct usb_device
*udev
)
875 * By the time we get here, the device has gotten a new device ID
876 * and is in the default state. We need to identify the thing and
877 * get the ball rolling..
879 * Returns 0 for success, != 0 for error.
881 int usb_new_device(struct usb_device
*dev
)
885 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf
, USB_BUFSIZ
);
888 * Allocate usb 3.0 device context.
889 * USB 3.0 (xHCI) protocol tries to allocate device slot
890 * and related data structures first. This call does that.
891 * Refer to sec 4.3.2 in xHCI spec rev1.0
893 if (usb_alloc_device(dev
)) {
894 printf("Cannot allocate device context to get SLOT_ID\n");
898 /* We still haven't set the Address yet */
902 #ifdef CONFIG_LEGACY_USB_INIT_SEQ
903 /* this is the old and known way of initializing devices, it is
904 * different than what Windows and Linux are doing. Windows and Linux
905 * both retrieve 64 bytes while reading the device descriptor
906 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
907 * invalid header while reading 8 bytes as device descriptor. */
908 dev
->descriptor
.bMaxPacketSize0
= 8; /* Start off at 8 bytes */
909 dev
->maxpacketsize
= PACKET_SIZE_8
;
910 dev
->epmaxpacketin
[0] = 8;
911 dev
->epmaxpacketout
[0] = 8;
913 err
= usb_get_descriptor(dev
, USB_DT_DEVICE
, 0, tmpbuf
, 8);
915 printf("\n USB device not responding, " \
916 "giving up (status=%lX)\n", dev
->status
);
919 memcpy(&dev
->descriptor
, tmpbuf
, 8);
921 /* This is a Windows scheme of initialization sequence, with double
922 * reset of the device (Linux uses the same sequence)
923 * Some equipment is said to work only with such init sequence; this
924 * patch is based on the work by Alan Stern:
925 * http://sourceforge.net/mailarchive/forum.php?
926 * thread_id=5729457&forum_id=5398
928 __maybe_unused
struct usb_device_descriptor
*desc
;
929 struct usb_device
*parent
= dev
->parent
;
930 unsigned short portstatus
;
932 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
933 * only 18 bytes long, this will terminate with a short packet. But if
934 * the maxpacket size is 8 or 16 the device may be waiting to transmit
935 * some more, or keeps on retransmitting the 8 byte header. */
937 desc
= (struct usb_device_descriptor
*)tmpbuf
;
938 dev
->descriptor
.bMaxPacketSize0
= 64; /* Start off at 64 bytes */
939 /* Default to 64 byte max packet size */
940 dev
->maxpacketsize
= PACKET_SIZE_64
;
941 dev
->epmaxpacketin
[0] = 64;
942 dev
->epmaxpacketout
[0] = 64;
945 * XHCI needs to issue a Address device command to setup
946 * proper device context structures, before it can interact
947 * with the device. So a get_descriptor will fail before any
948 * of that is done for XHCI unlike EHCI.
950 #ifndef CONFIG_USB_XHCI
951 err
= usb_get_descriptor(dev
, USB_DT_DEVICE
, 0, desc
, 64);
953 debug("usb_new_device: usb_get_descriptor() failed\n");
957 dev
->descriptor
.bMaxPacketSize0
= desc
->bMaxPacketSize0
;
959 * Fetch the device class, driver can use this info
960 * to differentiate between HUB and DEVICE.
962 dev
->descriptor
.bDeviceClass
= desc
->bDeviceClass
;
966 /* reset the port for the second time */
967 err
= hub_port_reset(dev
->parent
, dev
->portnr
- 1, &portstatus
);
969 printf("\n Couldn't reset port %i\n", dev
->portnr
);
975 dev
->epmaxpacketin
[0] = dev
->descriptor
.bMaxPacketSize0
;
976 dev
->epmaxpacketout
[0] = dev
->descriptor
.bMaxPacketSize0
;
977 switch (dev
->descriptor
.bMaxPacketSize0
) {
979 dev
->maxpacketsize
= PACKET_SIZE_8
;
982 dev
->maxpacketsize
= PACKET_SIZE_16
;
985 dev
->maxpacketsize
= PACKET_SIZE_32
;
988 dev
->maxpacketsize
= PACKET_SIZE_64
;
993 err
= usb_set_address(dev
); /* set address */
996 printf("\n USB device not accepting new address " \
997 "(error=%lX)\n", dev
->status
);
1001 mdelay(10); /* Let the SET_ADDRESS settle */
1003 tmp
= sizeof(dev
->descriptor
);
1005 err
= usb_get_descriptor(dev
, USB_DT_DEVICE
, 0,
1006 tmpbuf
, sizeof(dev
->descriptor
));
1009 printf("unable to get device descriptor (error=%d)\n",
1012 printf("USB device descriptor short read " \
1013 "(expected %i, got %i)\n", tmp
, err
);
1016 memcpy(&dev
->descriptor
, tmpbuf
, sizeof(dev
->descriptor
));
1017 /* correct le values */
1018 le16_to_cpus(&dev
->descriptor
.bcdUSB
);
1019 le16_to_cpus(&dev
->descriptor
.idVendor
);
1020 le16_to_cpus(&dev
->descriptor
.idProduct
);
1021 le16_to_cpus(&dev
->descriptor
.bcdDevice
);
1022 /* only support for one config for now */
1023 err
= usb_get_configuration_no(dev
, tmpbuf
, 0);
1025 printf("usb_new_device: Cannot read configuration, " \
1026 "skipping device %04x:%04x\n",
1027 dev
->descriptor
.idVendor
, dev
->descriptor
.idProduct
);
1030 usb_parse_config(dev
, tmpbuf
, 0);
1031 usb_set_maxpacket(dev
);
1032 /* we set the default configuration here */
1033 if (usb_set_configuration(dev
, dev
->config
.desc
.bConfigurationValue
)) {
1034 printf("failed to set default configuration " \
1035 "len %d, status %lX\n", dev
->act_len
, dev
->status
);
1038 debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
1039 dev
->descriptor
.iManufacturer
, dev
->descriptor
.iProduct
,
1040 dev
->descriptor
.iSerialNumber
);
1041 memset(dev
->mf
, 0, sizeof(dev
->mf
));
1042 memset(dev
->prod
, 0, sizeof(dev
->prod
));
1043 memset(dev
->serial
, 0, sizeof(dev
->serial
));
1044 if (dev
->descriptor
.iManufacturer
)
1045 usb_string(dev
, dev
->descriptor
.iManufacturer
,
1046 dev
->mf
, sizeof(dev
->mf
));
1047 if (dev
->descriptor
.iProduct
)
1048 usb_string(dev
, dev
->descriptor
.iProduct
,
1049 dev
->prod
, sizeof(dev
->prod
));
1050 if (dev
->descriptor
.iSerialNumber
)
1051 usb_string(dev
, dev
->descriptor
.iSerialNumber
,
1052 dev
->serial
, sizeof(dev
->serial
));
1053 debug("Manufacturer %s\n", dev
->mf
);
1054 debug("Product %s\n", dev
->prod
);
1055 debug("SerialNumber %s\n", dev
->serial
);
1056 /* now prode if the device is a hub */
1057 usb_hub_probe(dev
, 0);
1062 int board_usb_init(int index
, enum usb_init_type init
)