1 // SPDX-License-Identifier: GPL-2.0+
3 * Most of this source has been derived from the Linux USB
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)
16 * (C) Copyright 2001 Denis Peter, MPL AG Switzerland
22 * Since this is a bootloader, the devices will not be automatic
23 * (re)configured on hotplug, but after a restart of the USB the
26 * For each transfer (except "Interrupt") we wait for completion.
32 #include <asm/processor.h>
33 #include <linux/compiler.h>
34 #include <linux/ctype.h>
35 #include <asm/byteorder.h>
36 #include <asm/unaligned.h>
40 #define USB_BUFSIZ 512
42 static int asynch_allowed
;
43 char usb_started
; /* flag for the started/stopped USB status */
46 static struct usb_device usb_dev
[USB_MAX_DEVICE
];
49 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
50 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1
53 /***************************************************************************
59 struct usb_device
*dev
;
60 int i
, start_index
= 0;
61 int controllers_initialized
= 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");
81 controllers_initialized
++;
85 if (ret
) { /* Other error. */
86 puts("lowlevel init failed\n");
90 * lowlevel init is OK, now scan the bus for devices
91 * i.e. search HUBs and configure them
93 controllers_initialized
++;
94 start_index
= dev_index
;
95 printf("scanning bus %d for devices... ", i
);
96 ret
= usb_alloc_new_device(ctrl
, &dev
);
101 * device 0 is always present
102 * (root hub, so let it analyze)
104 ret
= usb_new_device(dev
);
106 usb_free_device(dev
->controller
);
108 if (start_index
== dev_index
) {
109 puts("No USB Device found\n");
112 printf("%d USB Device(s) found\n",
113 dev_index
- start_index
);
120 /* if we were not able to find at least one working bus, bail out */
121 if (controllers_initialized
== 0)
122 puts("USB error: all controllers failed lowlevel init\n");
124 return usb_started
? 0 : -ENODEV
;
127 /******************************************************************************
128 * Stop USB this stops the LowLevel Part and deregisters USB devices.
139 for (i
= 0; i
< CONFIG_USB_MAX_CONTROLLER_COUNT
; i
++) {
140 if (usb_lowlevel_stop(i
))
141 printf("failed to stop USB controller %d\n", i
);
148 /******************************************************************************
149 * Detect if a USB device has been plugged or unplugged.
151 int usb_detect_change(void)
156 for (j
= 0; j
< USB_MAX_DEVICE
; j
++) {
157 for (i
= 0; i
< usb_dev
[j
].maxchild
; i
++) {
158 struct usb_port_status status
;
160 if (usb_get_port_status(&usb_dev
[j
], i
+ 1,
162 /* USB request failed */
165 if (le16_to_cpu(status
.wPortChange
) &
166 USB_PORT_STAT_C_CONNECTION
)
175 * disables the asynch behaviour of the control message. This is used for data
176 * transfers that uses the exclusiv access to the control and bulk messages.
177 * Returns the old value so it can be restored later.
179 int usb_disable_asynch(int disable
)
181 int old_value
= asynch_allowed
;
183 asynch_allowed
= !disable
;
186 #endif /* !CONFIG_DM_USB */
189 /*-------------------------------------------------------------------
195 * submits an Interrupt Message
197 int usb_submit_int_msg(struct usb_device
*dev
, unsigned long pipe
,
198 void *buffer
, int transfer_len
, int interval
)
200 return submit_int_msg(dev
, pipe
, buffer
, transfer_len
, interval
);
204 * submits a control message and waits for comletion (at least timeout * 1ms)
205 * If timeout is 0, we don't wait for completion (used as example to set and
206 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
207 * allow control messages with 0 timeout, by previousely resetting the flag
208 * asynch_allowed (usb_disable_asynch(1)).
209 * returns the transferred length if OK or -1 if error. The transferred length
210 * and the current status are stored in the dev->act_len and dev->status.
212 int usb_control_msg(struct usb_device
*dev
, unsigned int pipe
,
213 unsigned char request
, unsigned char requesttype
,
214 unsigned short value
, unsigned short index
,
215 void *data
, unsigned short size
, int timeout
)
217 ALLOC_CACHE_ALIGN_BUFFER(struct devrequest
, setup_packet
, 1);
220 if ((timeout
== 0) && (!asynch_allowed
)) {
221 /* request for a asynch control pipe is not allowed */
225 /* set setup command */
226 setup_packet
->requesttype
= requesttype
;
227 setup_packet
->request
= request
;
228 setup_packet
->value
= cpu_to_le16(value
);
229 setup_packet
->index
= cpu_to_le16(index
);
230 setup_packet
->length
= cpu_to_le16(size
);
231 debug("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
232 "value 0x%X index 0x%X length 0x%X\n",
233 request
, requesttype
, value
, index
, size
);
234 dev
->status
= USB_ST_NOT_PROC
; /*not yet processed */
236 err
= submit_control_msg(dev
, pipe
, data
, size
, setup_packet
);
243 * Wait for status to update until timeout expires, USB driver
244 * interrupt handler may set the status when the USB operation has
248 if (!((volatile unsigned long)dev
->status
& USB_ST_NOT_PROC
))
259 /*-------------------------------------------------------------------
260 * submits bulk message, and waits for completion. returns 0 if Ok or
262 * synchronous behavior
264 int usb_bulk_msg(struct usb_device
*dev
, unsigned int pipe
,
265 void *data
, int len
, int *actual_length
, int timeout
)
269 dev
->status
= USB_ST_NOT_PROC
; /*not yet processed */
270 if (submit_bulk_msg(dev
, pipe
, data
, len
) < 0)
273 if (!((volatile unsigned long)dev
->status
& USB_ST_NOT_PROC
))
277 *actual_length
= dev
->act_len
;
278 if (dev
->status
== 0)
285 /*-------------------------------------------------------------------
290 * returns the max packet size, depending on the pipe direction and
291 * the configurations values
293 int usb_maxpacket(struct usb_device
*dev
, unsigned long pipe
)
295 /* direction is out -> use emaxpacket out */
296 if ((pipe
& USB_DIR_IN
) == 0)
297 return dev
->epmaxpacketout
[((pipe
>>15) & 0xf)];
299 return dev
->epmaxpacketin
[((pipe
>>15) & 0xf)];
303 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
304 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
305 * when it is inlined in 1 single routine. What happens is that the register r3
306 * is used as loop-count 'i', but gets overwritten later on.
307 * This is clearly a compiler bug, but it is easier to workaround it here than
308 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
309 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
311 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
314 usb_set_maxpacket_ep(struct usb_device
*dev
, int if_idx
, int ep_idx
)
317 struct usb_endpoint_descriptor
*ep
;
318 u16 ep_wMaxPacketSize
;
320 ep
= &dev
->config
.if_desc
[if_idx
].ep_desc
[ep_idx
];
322 b
= ep
->bEndpointAddress
& USB_ENDPOINT_NUMBER_MASK
;
323 ep_wMaxPacketSize
= get_unaligned(&ep
->wMaxPacketSize
);
325 if ((ep
->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) ==
326 USB_ENDPOINT_XFER_CONTROL
) {
327 /* Control => bidirectional */
328 dev
->epmaxpacketout
[b
] = ep_wMaxPacketSize
;
329 dev
->epmaxpacketin
[b
] = ep_wMaxPacketSize
;
330 debug("##Control EP epmaxpacketout/in[%d] = %d\n",
331 b
, dev
->epmaxpacketin
[b
]);
333 if ((ep
->bEndpointAddress
& 0x80) == 0) {
335 if (ep_wMaxPacketSize
> dev
->epmaxpacketout
[b
]) {
336 dev
->epmaxpacketout
[b
] = ep_wMaxPacketSize
;
337 debug("##EP epmaxpacketout[%d] = %d\n",
338 b
, dev
->epmaxpacketout
[b
]);
342 if (ep_wMaxPacketSize
> dev
->epmaxpacketin
[b
]) {
343 dev
->epmaxpacketin
[b
] = ep_wMaxPacketSize
;
344 debug("##EP epmaxpacketin[%d] = %d\n",
345 b
, dev
->epmaxpacketin
[b
]);
352 * set the max packed value of all endpoints in the given configuration
354 static int usb_set_maxpacket(struct usb_device
*dev
)
358 for (i
= 0; i
< dev
->config
.desc
.bNumInterfaces
; i
++)
359 for (ii
= 0; ii
< dev
->config
.if_desc
[i
].desc
.bNumEndpoints
; ii
++)
360 usb_set_maxpacket_ep(dev
, i
, ii
);
365 /*******************************************************************************
366 * Parse the config, located in buffer, and fills the dev->config structure.
367 * Note that all little/big endian swapping are done automatically.
368 * (wTotalLength has already been swapped and sanitized when it was read.)
370 static int usb_parse_config(struct usb_device
*dev
,
371 unsigned char *buffer
, int cfgno
)
373 struct usb_descriptor_header
*head
;
374 int index
, ifno
, epno
, curr_if_num
;
375 u16 ep_wMaxPacketSize
;
376 struct usb_interface
*if_desc
= NULL
;
382 dev
->configno
= cfgno
;
383 head
= (struct usb_descriptor_header
*) &buffer
[0];
384 if (head
->bDescriptorType
!= USB_DT_CONFIG
) {
385 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
386 head
->bDescriptorType
);
389 if (head
->bLength
!= USB_DT_CONFIG_SIZE
) {
390 printf("ERROR: Invalid USB CFG length (%d)\n", head
->bLength
);
393 memcpy(&dev
->config
, head
, USB_DT_CONFIG_SIZE
);
394 dev
->config
.no_of_if
= 0;
396 index
= dev
->config
.desc
.bLength
;
397 /* Ok the first entry must be a configuration entry,
398 * now process the others */
399 head
= (struct usb_descriptor_header
*) &buffer
[index
];
400 while (index
+ 1 < dev
->config
.desc
.wTotalLength
&& head
->bLength
) {
401 switch (head
->bDescriptorType
) {
402 case USB_DT_INTERFACE
:
403 if (head
->bLength
!= USB_DT_INTERFACE_SIZE
) {
404 printf("ERROR: Invalid USB IF length (%d)\n",
408 if (index
+ USB_DT_INTERFACE_SIZE
>
409 dev
->config
.desc
.wTotalLength
) {
410 puts("USB IF descriptor overflowed buffer!\n");
413 if (((struct usb_interface_descriptor
*) \
414 head
)->bInterfaceNumber
!= curr_if_num
) {
415 /* this is a new interface, copy new desc */
416 ifno
= dev
->config
.no_of_if
;
417 if (ifno
>= USB_MAXINTERFACES
) {
418 puts("Too many USB interfaces!\n");
419 /* try to go on with what we have */
422 if_desc
= &dev
->config
.if_desc
[ifno
];
423 dev
->config
.no_of_if
++;
424 memcpy(if_desc
, head
,
425 USB_DT_INTERFACE_SIZE
);
426 if_desc
->no_of_ep
= 0;
427 if_desc
->num_altsetting
= 1;
429 if_desc
->desc
.bInterfaceNumber
;
431 /* found alternate setting for the interface */
433 if_desc
= &dev
->config
.if_desc
[ifno
];
434 if_desc
->num_altsetting
++;
438 case USB_DT_ENDPOINT
:
439 if (head
->bLength
!= USB_DT_ENDPOINT_SIZE
&&
440 head
->bLength
!= USB_DT_ENDPOINT_AUDIO_SIZE
) {
441 printf("ERROR: Invalid USB EP length (%d)\n",
445 if (index
+ head
->bLength
>
446 dev
->config
.desc
.wTotalLength
) {
447 puts("USB EP descriptor overflowed buffer!\n");
451 puts("Endpoint descriptor out of order!\n");
454 epno
= dev
->config
.if_desc
[ifno
].no_of_ep
;
455 if_desc
= &dev
->config
.if_desc
[ifno
];
456 if (epno
>= USB_MAXENDPOINTS
) {
457 printf("Interface %d has too many endpoints!\n",
458 if_desc
->desc
.bInterfaceNumber
);
461 /* found an endpoint */
463 memcpy(&if_desc
->ep_desc
[epno
], head
,
464 USB_DT_ENDPOINT_SIZE
);
465 ep_wMaxPacketSize
= get_unaligned(&dev
->config
.\
469 put_unaligned(le16_to_cpu(ep_wMaxPacketSize
),
474 debug("if %d, ep %d\n", ifno
, epno
);
476 case USB_DT_SS_ENDPOINT_COMP
:
477 if (head
->bLength
!= USB_DT_SS_EP_COMP_SIZE
) {
478 printf("ERROR: Invalid USB EPC length (%d)\n",
482 if (index
+ USB_DT_SS_EP_COMP_SIZE
>
483 dev
->config
.desc
.wTotalLength
) {
484 puts("USB EPC descriptor overflowed buffer!\n");
487 if (ifno
< 0 || epno
< 0) {
488 puts("EPC descriptor out of order!\n");
491 if_desc
= &dev
->config
.if_desc
[ifno
];
492 memcpy(&if_desc
->ss_ep_comp_desc
[epno
], head
,
493 USB_DT_SS_EP_COMP_SIZE
);
496 if (head
->bLength
== 0)
499 debug("unknown Description Type : %x\n",
500 head
->bDescriptorType
);
504 unsigned char *ch
= (unsigned char *)head
;
507 for (i
= 0; i
< head
->bLength
; i
++)
508 debug("%02X ", *ch
++);
514 index
+= head
->bLength
;
515 head
= (struct usb_descriptor_header
*)&buffer
[index
];
520 /***********************************************************************
522 * endp: endpoint number in bits 0-3;
523 * direction flag in bit 7 (1 = IN, 0 = OUT)
525 int usb_clear_halt(struct usb_device
*dev
, int pipe
)
528 int endp
= usb_pipeendpoint(pipe
)|(usb_pipein(pipe
)<<7);
530 result
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
531 USB_REQ_CLEAR_FEATURE
, USB_RECIP_ENDPOINT
, 0,
532 endp
, NULL
, 0, USB_CNTL_TIMEOUT
* 3);
534 /* don't clear if failed */
539 * NOTE: we do not get status and verify reset was successful
540 * as some devices are reported to lock up upon this check..
543 usb_endpoint_running(dev
, usb_pipeendpoint(pipe
), usb_pipeout(pipe
));
545 /* toggle is reset on clear */
546 usb_settoggle(dev
, usb_pipeendpoint(pipe
), usb_pipeout(pipe
), 0);
551 /**********************************************************************
552 * get_descriptor type
554 static int usb_get_descriptor(struct usb_device
*dev
, unsigned char type
,
555 unsigned char index
, void *buf
, int size
)
557 return usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
558 USB_REQ_GET_DESCRIPTOR
, USB_DIR_IN
,
559 (type
<< 8) + index
, 0, buf
, size
,
563 /**********************************************************************
564 * gets len of configuration cfgno
566 int usb_get_configuration_len(struct usb_device
*dev
, int cfgno
)
569 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, 9);
570 struct usb_config_descriptor
*config
;
572 config
= (struct usb_config_descriptor
*)&buffer
[0];
573 result
= usb_get_descriptor(dev
, USB_DT_CONFIG
, cfgno
, buffer
, 9);
576 printf("unable to get descriptor, error %lX\n",
579 printf("config descriptor too short " \
580 "(expected %i, got %i)\n", 9, result
);
583 return le16_to_cpu(config
->wTotalLength
);
586 /**********************************************************************
587 * gets configuration cfgno and store it in the buffer
589 int usb_get_configuration_no(struct usb_device
*dev
, int cfgno
,
590 unsigned char *buffer
, int length
)
593 struct usb_config_descriptor
*config
;
595 config
= (struct usb_config_descriptor
*)&buffer
[0];
596 result
= usb_get_descriptor(dev
, USB_DT_CONFIG
, cfgno
, buffer
, length
);
597 debug("get_conf_no %d Result %d, wLength %d\n", cfgno
, result
,
598 le16_to_cpu(config
->wTotalLength
));
599 config
->wTotalLength
= result
; /* validated, with CPU byte order */
604 /********************************************************************
605 * set address of a device to the value in dev->devnum.
606 * This can only be done by addressing the device via the default address (0)
608 static int usb_set_address(struct usb_device
*dev
)
610 debug("set address %d\n", dev
->devnum
);
612 return usb_control_msg(dev
, usb_snddefctrl(dev
), USB_REQ_SET_ADDRESS
,
613 0, (dev
->devnum
), 0, NULL
, 0, USB_CNTL_TIMEOUT
);
616 /********************************************************************
617 * set interface number to interface
619 int usb_set_interface(struct usb_device
*dev
, int interface
, int alternate
)
621 struct usb_interface
*if_face
= NULL
;
624 for (i
= 0; i
< dev
->config
.desc
.bNumInterfaces
; i
++) {
625 if (dev
->config
.if_desc
[i
].desc
.bInterfaceNumber
== interface
) {
626 if_face
= &dev
->config
.if_desc
[i
];
631 printf("selecting invalid interface %d", interface
);
635 * We should return now for devices with only one alternate setting.
636 * According to 9.4.10 of the Universal Serial Bus Specification
637 * Revision 2.0 such devices can return with a STALL. This results in
638 * some USB sticks timeouting during initialization and then being
639 * unusable in U-Boot.
641 if (if_face
->num_altsetting
== 1)
644 ret
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
645 USB_REQ_SET_INTERFACE
, USB_RECIP_INTERFACE
,
646 alternate
, interface
, NULL
, 0,
647 USB_CNTL_TIMEOUT
* 5);
654 /********************************************************************
655 * set configuration number to configuration
657 static int usb_set_configuration(struct usb_device
*dev
, int configuration
)
660 debug("set configuration %d\n", configuration
);
661 /* set setup command */
662 res
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
663 USB_REQ_SET_CONFIGURATION
, 0,
665 NULL
, 0, USB_CNTL_TIMEOUT
);
674 /********************************************************************
675 * set protocol to protocol
677 int usb_set_protocol(struct usb_device
*dev
, int ifnum
, int protocol
)
679 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
680 USB_REQ_SET_PROTOCOL
, USB_TYPE_CLASS
| USB_RECIP_INTERFACE
,
681 protocol
, ifnum
, NULL
, 0, USB_CNTL_TIMEOUT
);
684 /********************************************************************
687 int usb_set_idle(struct usb_device
*dev
, int ifnum
, int duration
, int report_id
)
689 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
690 USB_REQ_SET_IDLE
, USB_TYPE_CLASS
| USB_RECIP_INTERFACE
,
691 (duration
<< 8) | report_id
, ifnum
, NULL
, 0, USB_CNTL_TIMEOUT
);
694 /********************************************************************
697 int usb_get_report(struct usb_device
*dev
, int ifnum
, unsigned char type
,
698 unsigned char id
, void *buf
, int size
)
700 return usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
702 USB_DIR_IN
| USB_TYPE_CLASS
| USB_RECIP_INTERFACE
,
703 (type
<< 8) + id
, ifnum
, buf
, size
, USB_CNTL_TIMEOUT
);
706 /********************************************************************
707 * get class descriptor
709 int usb_get_class_descriptor(struct usb_device
*dev
, int ifnum
,
710 unsigned char type
, unsigned char id
, void *buf
, int size
)
712 return usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
713 USB_REQ_GET_DESCRIPTOR
, USB_RECIP_INTERFACE
| USB_DIR_IN
,
714 (type
<< 8) + id
, ifnum
, buf
, size
, USB_CNTL_TIMEOUT
);
717 /********************************************************************
718 * get string index in buffer
720 static int usb_get_string(struct usb_device
*dev
, unsigned short langid
,
721 unsigned char index
, void *buf
, int size
)
726 for (i
= 0; i
< 3; ++i
) {
727 /* some devices are flaky */
728 result
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
729 USB_REQ_GET_DESCRIPTOR
, USB_DIR_IN
,
730 (USB_DT_STRING
<< 8) + index
, langid
, buf
, size
,
741 static void usb_try_string_workarounds(unsigned char *buf
, int *length
)
743 int newlength
, oldlength
= *length
;
745 for (newlength
= 2; newlength
+ 1 < oldlength
; newlength
+= 2)
746 if (!isprint(buf
[newlength
]) || buf
[newlength
+ 1])
756 static int usb_string_sub(struct usb_device
*dev
, unsigned int langid
,
757 unsigned int index
, unsigned char *buf
)
761 /* Try to read the string descriptor by asking for the maximum
762 * possible number of bytes */
763 rc
= usb_get_string(dev
, langid
, index
, buf
, 255);
765 /* If that failed try to read the descriptor length, then
766 * ask for just that many bytes */
768 rc
= usb_get_string(dev
, langid
, index
, buf
, 2);
770 rc
= usb_get_string(dev
, langid
, index
, buf
, buf
[0]);
774 if (!buf
[0] && !buf
[1])
775 usb_try_string_workarounds(buf
, &rc
);
777 /* There might be extra junk at the end of the descriptor */
781 rc
= rc
- (rc
& 1); /* force a multiple of two */
791 /********************************************************************
793 * Get string index and translate it to ascii.
794 * returns string length (> 0) or error (< 0)
796 int usb_string(struct usb_device
*dev
, int index
, char *buf
, size_t size
)
798 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf
, USB_BUFSIZ
);
803 if (size
<= 0 || !buf
|| !index
)
808 /* get langid for strings if it's not yet known */
809 if (!dev
->have_langid
) {
810 err
= usb_string_sub(dev
, 0, 0, tbuf
);
812 debug("error getting string descriptor 0 " \
813 "(error=%lx)\n", dev
->status
);
815 } else if (tbuf
[0] < 4) {
816 debug("string descriptor 0 too short\n");
819 dev
->have_langid
= -1;
820 dev
->string_langid
= tbuf
[2] | (tbuf
[3] << 8);
821 /* always use the first langid listed */
822 debug("USB device number %d default " \
823 "language ID 0x%x\n",
824 dev
->devnum
, dev
->string_langid
);
828 err
= usb_string_sub(dev
, dev
->string_langid
, index
, tbuf
);
832 size
--; /* leave room for trailing NULL char in output buffer */
833 for (idx
= 0, u
= 2; u
< err
; u
+= 2) {
836 if (tbuf
[u
+1]) /* high byte */
837 buf
[idx
++] = '?'; /* non-ASCII character */
839 buf
[idx
++] = tbuf
[u
];
847 /********************************************************************
848 * USB device handling:
849 * the USB device are static allocated [USB_MAX_DEVICE].
852 #ifndef CONFIG_DM_USB
854 /* returns a pointer to the device with the index [index].
855 * if the device is not assigned (dev->devnum==-1) returns NULL
857 struct usb_device
*usb_get_dev_index(int index
)
859 if (usb_dev
[index
].devnum
== -1)
862 return &usb_dev
[index
];
865 int usb_alloc_new_device(struct udevice
*controller
, struct usb_device
**devp
)
868 debug("New Device %d\n", dev_index
);
869 if (dev_index
== USB_MAX_DEVICE
) {
870 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE
);
873 /* default Address is 0, real addresses start with 1 */
874 usb_dev
[dev_index
].devnum
= dev_index
+ 1;
875 usb_dev
[dev_index
].maxchild
= 0;
876 for (i
= 0; i
< USB_MAXCHILDREN
; i
++)
877 usb_dev
[dev_index
].children
[i
] = NULL
;
878 usb_dev
[dev_index
].parent
= NULL
;
879 usb_dev
[dev_index
].controller
= controller
;
881 *devp
= &usb_dev
[dev_index
- 1];
887 * Free the newly created device node.
888 * Called in error cases where configuring a newly attached
889 * device fails for some reason.
891 void usb_free_device(struct udevice
*controller
)
894 debug("Freeing device node: %d\n", dev_index
);
895 memset(&usb_dev
[dev_index
], 0, sizeof(struct usb_device
));
896 usb_dev
[dev_index
].devnum
= -1;
900 * XHCI issues Enable Slot command and thereafter
901 * allocates device contexts. Provide a weak alias
902 * function for the purpose, so that XHCI overrides it
903 * and EHCI/OHCI just work out of the box.
905 __weak
int usb_alloc_device(struct usb_device
*udev
)
909 #endif /* !CONFIG_DM_USB */
911 static int usb_hub_port_reset(struct usb_device
*dev
, struct usb_device
*hub
)
914 usb_reset_root_port(dev
);
919 static int get_descriptor_len(struct usb_device
*dev
, int len
, int expect_len
)
921 __maybe_unused
struct usb_device_descriptor
*desc
;
922 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf
, USB_BUFSIZ
);
925 desc
= (struct usb_device_descriptor
*)tmpbuf
;
927 err
= usb_get_descriptor(dev
, USB_DT_DEVICE
, 0, desc
, len
);
928 if (err
< expect_len
) {
930 printf("unable to get device descriptor (error=%d)\n",
934 printf("USB device descriptor short read (expected %i, got %i)\n",
939 memcpy(&dev
->descriptor
, tmpbuf
, sizeof(dev
->descriptor
));
944 static int usb_setup_descriptor(struct usb_device
*dev
, bool do_read
)
947 * This is a Windows scheme of initialization sequence, with double
948 * reset of the device (Linux uses the same sequence)
949 * Some equipment is said to work only with such init sequence; this
950 * patch is based on the work by Alan Stern:
951 * http://sourceforge.net/mailarchive/forum.php?
952 * thread_id=5729457&forum_id=5398
956 * send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
957 * only 18 bytes long, this will terminate with a short packet. But if
958 * the maxpacket size is 8 or 16 the device may be waiting to transmit
959 * some more, or keeps on retransmitting the 8 byte header.
962 if (dev
->speed
== USB_SPEED_LOW
) {
963 dev
->descriptor
.bMaxPacketSize0
= 8;
964 dev
->maxpacketsize
= PACKET_SIZE_8
;
966 dev
->descriptor
.bMaxPacketSize0
= 64;
967 dev
->maxpacketsize
= PACKET_SIZE_64
;
969 dev
->epmaxpacketin
[0] = dev
->descriptor
.bMaxPacketSize0
;
970 dev
->epmaxpacketout
[0] = dev
->descriptor
.bMaxPacketSize0
;
972 if (do_read
&& dev
->speed
== USB_SPEED_FULL
) {
976 * Validate we've received only at least 8 bytes, not that
977 * we've received the entire descriptor. The reasoning is:
978 * - The code only uses fields in the first 8 bytes, so
979 * that's all we need to have fetched at this stage.
980 * - The smallest maxpacket size is 8 bytes. Before we know
981 * the actual maxpacket the device uses, the USB controller
982 * may only accept a single packet. Consequently we are only
983 * guaranteed to receive 1 packet (at least 8 bytes) even in
986 * At least the DWC2 controller needs to be programmed with
987 * the number of packets in addition to the number of bytes.
988 * A request for 64 bytes of data with the maxpacket guessed
989 * as 64 (above) yields a request for 1 packet.
991 err
= get_descriptor_len(dev
, 64, 8);
996 dev
->epmaxpacketin
[0] = dev
->descriptor
.bMaxPacketSize0
;
997 dev
->epmaxpacketout
[0] = dev
->descriptor
.bMaxPacketSize0
;
998 switch (dev
->descriptor
.bMaxPacketSize0
) {
1000 dev
->maxpacketsize
= PACKET_SIZE_8
;
1003 dev
->maxpacketsize
= PACKET_SIZE_16
;
1006 dev
->maxpacketsize
= PACKET_SIZE_32
;
1009 dev
->maxpacketsize
= PACKET_SIZE_64
;
1012 printf("%s: invalid max packet size\n", __func__
);
1019 static int usb_prepare_device(struct usb_device
*dev
, int addr
, bool do_read
,
1020 struct usb_device
*parent
)
1025 * Allocate usb 3.0 device context.
1026 * USB 3.0 (xHCI) protocol tries to allocate device slot
1027 * and related data structures first. This call does that.
1028 * Refer to sec 4.3.2 in xHCI spec rev1.0
1030 err
= usb_alloc_device(dev
);
1032 printf("Cannot allocate device context to get SLOT_ID\n");
1035 err
= usb_setup_descriptor(dev
, do_read
);
1038 err
= usb_hub_port_reset(dev
, parent
);
1044 err
= usb_set_address(dev
); /* set address */
1047 printf("\n USB device not accepting new address " \
1048 "(error=%lX)\n", dev
->status
);
1052 mdelay(10); /* Let the SET_ADDRESS settle */
1055 * If we haven't read device descriptor before, read it here
1056 * after device is assigned an address. This is only applicable
1060 err
= usb_setup_descriptor(dev
, true);
1068 int usb_select_config(struct usb_device
*dev
)
1070 unsigned char *tmpbuf
= NULL
;
1073 err
= get_descriptor_len(dev
, USB_DT_DEVICE_SIZE
, USB_DT_DEVICE_SIZE
);
1077 /* correct le values */
1078 le16_to_cpus(&dev
->descriptor
.bcdUSB
);
1079 le16_to_cpus(&dev
->descriptor
.idVendor
);
1080 le16_to_cpus(&dev
->descriptor
.idProduct
);
1081 le16_to_cpus(&dev
->descriptor
.bcdDevice
);
1084 * Kingston DT Ultimate 32GB USB 3.0 seems to be extremely sensitive
1085 * about this first Get Descriptor request. If there are any other
1086 * requests in the first microframe, the stick crashes. Wait about
1087 * one microframe duration here (1mS for USB 1.x , 125uS for USB 2.0).
1091 /* only support for one config for now */
1092 err
= usb_get_configuration_len(dev
, 0);
1094 tmpbuf
= (unsigned char *)malloc_cache_aligned(err
);
1098 err
= usb_get_configuration_no(dev
, 0, tmpbuf
, err
);
1101 printf("usb_new_device: Cannot read configuration, " \
1102 "skipping device %04x:%04x\n",
1103 dev
->descriptor
.idVendor
, dev
->descriptor
.idProduct
);
1107 usb_parse_config(dev
, tmpbuf
, 0);
1109 usb_set_maxpacket(dev
);
1111 * we set the default configuration here
1112 * This seems premature. If the driver wants a different configuration
1113 * it will need to select itself.
1115 err
= usb_set_configuration(dev
, dev
->config
.desc
.bConfigurationValue
);
1117 printf("failed to set default configuration " \
1118 "len %d, status %lX\n", dev
->act_len
, dev
->status
);
1123 * Wait until the Set Configuration request gets processed by the
1124 * device. This is required by at least SanDisk Cruzer Pop USB 2.0
1125 * and Kingston DT Ultimate 32GB USB 3.0 on DWC2 OTG controller.
1129 debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
1130 dev
->descriptor
.iManufacturer
, dev
->descriptor
.iProduct
,
1131 dev
->descriptor
.iSerialNumber
);
1132 memset(dev
->mf
, 0, sizeof(dev
->mf
));
1133 memset(dev
->prod
, 0, sizeof(dev
->prod
));
1134 memset(dev
->serial
, 0, sizeof(dev
->serial
));
1135 if (dev
->descriptor
.iManufacturer
)
1136 usb_string(dev
, dev
->descriptor
.iManufacturer
,
1137 dev
->mf
, sizeof(dev
->mf
));
1138 if (dev
->descriptor
.iProduct
)
1139 usb_string(dev
, dev
->descriptor
.iProduct
,
1140 dev
->prod
, sizeof(dev
->prod
));
1141 if (dev
->descriptor
.iSerialNumber
)
1142 usb_string(dev
, dev
->descriptor
.iSerialNumber
,
1143 dev
->serial
, sizeof(dev
->serial
));
1144 debug("Manufacturer %s\n", dev
->mf
);
1145 debug("Product %s\n", dev
->prod
);
1146 debug("SerialNumber %s\n", dev
->serial
);
1151 int usb_setup_device(struct usb_device
*dev
, bool do_read
,
1152 struct usb_device
*parent
)
1157 /* We still haven't set the Address yet */
1161 ret
= usb_prepare_device(dev
, addr
, do_read
, parent
);
1164 ret
= usb_select_config(dev
);
1169 #ifndef CONFIG_DM_USB
1171 * By the time we get here, the device has gotten a new device ID
1172 * and is in the default state. We need to identify the thing and
1173 * get the ball rolling..
1175 * Returns 0 for success, != 0 for error.
1177 int usb_new_device(struct usb_device
*dev
)
1179 bool do_read
= true;
1183 * XHCI needs to issue a Address device command to setup
1184 * proper device context structures, before it can interact
1185 * with the device. So a get_descriptor will fail before any
1186 * of that is done for XHCI unlike EHCI.
1188 #ifdef CONFIG_USB_XHCI_HCD
1191 err
= usb_setup_device(dev
, do_read
, dev
->parent
);
1195 /* Now probe if the device is a hub */
1196 err
= usb_hub_probe(dev
, 0);
1205 int board_usb_init(int index
, enum usb_init_type init
)
1211 int board_usb_cleanup(int index
, enum usb_init_type init
)
1216 bool usb_device_has_child_on_port(struct usb_device
*parent
, int port
)
1218 #ifdef CONFIG_DM_USB
1221 return parent
->children
[port
] != NULL
;
1225 #ifdef CONFIG_DM_USB
1226 void usb_find_usb2_hub_address_port(struct usb_device
*udev
,
1227 uint8_t *hub_address
, uint8_t *hub_port
)
1229 struct udevice
*parent
;
1230 struct usb_device
*uparent
, *ttdev
;
1233 * When called from usb-uclass.c: usb_scan_device() udev->dev points
1234 * to the parent udevice, not the actual udevice belonging to the
1235 * udev as the device is not instantiated yet. So when searching
1236 * for the first usb-2 parent start with udev->dev not
1237 * udev->dev->parent .
1241 uparent
= dev_get_parent_priv(parent
);
1243 while (uparent
->speed
!= USB_SPEED_HIGH
) {
1244 struct udevice
*dev
= parent
;
1246 if (device_get_uclass_id(dev
->parent
) != UCLASS_USB_HUB
) {
1247 printf("Error: Cannot find high speed parent of usb-1 device\n");
1253 ttdev
= dev_get_parent_priv(dev
);
1254 parent
= dev
->parent
;
1255 uparent
= dev_get_parent_priv(parent
);
1257 *hub_address
= uparent
->devnum
;
1258 *hub_port
= ttdev
->portnr
;
1261 void usb_find_usb2_hub_address_port(struct usb_device
*udev
,
1262 uint8_t *hub_address
, uint8_t *hub_port
)
1264 /* Find out the nearest parent which is high speed */
1265 while (udev
->parent
->parent
!= NULL
)
1266 if (udev
->parent
->speed
!= USB_SPEED_HIGH
) {
1267 udev
= udev
->parent
;
1269 *hub_address
= udev
->parent
->devnum
;
1270 *hub_port
= udev
->portnr
;
1274 printf("Error: Cannot find high speed parent of usb-1 device\n");