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.
33 #include <asm/processor.h>
34 #include <linux/compiler.h>
35 #include <linux/ctype.h>
36 #include <asm/byteorder.h>
37 #include <asm/unaligned.h>
41 #define USB_BUFSIZ 512
43 static int asynch_allowed
;
44 char usb_started
; /* flag for the started/stopped USB status */
47 static struct usb_device usb_dev
[USB_MAX_DEVICE
];
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;
62 int controllers_initialized
= 0;
69 /* first make all devices unknown */
70 for (i
= 0; i
< USB_MAX_DEVICE
; i
++) {
71 memset(&usb_dev
[i
], 0, sizeof(struct usb_device
));
72 usb_dev
[i
].devnum
= -1;
75 /* init low_level USB */
76 for (i
= 0; i
< CONFIG_USB_MAX_CONTROLLER_COUNT
; i
++) {
77 /* init low_level USB */
79 ret
= usb_lowlevel_init(i
, USB_INIT_HOST
, &ctrl
);
80 if (ret
== -ENODEV
) { /* No such device. */
81 puts("Port not available.\n");
82 controllers_initialized
++;
86 if (ret
) { /* Other error. */
87 puts("lowlevel init failed\n");
91 * lowlevel init is OK, now scan the bus for devices
92 * i.e. search HUBs and configure them
94 controllers_initialized
++;
95 start_index
= dev_index
;
96 printf("scanning bus %d for devices... ", i
);
97 ret
= usb_alloc_new_device(ctrl
, &dev
);
102 * device 0 is always present
103 * (root hub, so let it analyze)
105 ret
= usb_new_device(dev
);
107 usb_free_device(dev
->controller
);
109 if (start_index
== dev_index
) {
110 puts("No USB Device found\n");
113 printf("%d USB Device(s) found\n",
114 dev_index
- start_index
);
121 /* if we were not able to find at least one working bus, bail out */
122 if (controllers_initialized
== 0)
123 puts("USB error: all controllers failed lowlevel init\n");
125 return usb_started
? 0 : -ENODEV
;
128 /******************************************************************************
129 * Stop USB this stops the LowLevel Part and deregisters USB devices.
140 for (i
= 0; i
< CONFIG_USB_MAX_CONTROLLER_COUNT
; i
++) {
141 if (usb_lowlevel_stop(i
))
142 printf("failed to stop USB controller %d\n", i
);
149 /******************************************************************************
150 * Detect if a USB device has been plugged or unplugged.
152 int usb_detect_change(void)
157 for (j
= 0; j
< USB_MAX_DEVICE
; j
++) {
158 for (i
= 0; i
< usb_dev
[j
].maxchild
; i
++) {
159 struct usb_port_status status
;
161 if (usb_get_port_status(&usb_dev
[j
], i
+ 1,
163 /* USB request failed */
166 if (le16_to_cpu(status
.wPortChange
) &
167 USB_PORT_STAT_C_CONNECTION
)
176 * disables the asynch behaviour of the control message. This is used for data
177 * transfers that uses the exclusiv access to the control and bulk messages.
178 * Returns the old value so it can be restored later.
180 int usb_disable_asynch(int disable
)
182 int old_value
= asynch_allowed
;
184 asynch_allowed
= !disable
;
187 #endif /* !CONFIG_DM_USB */
190 /*-------------------------------------------------------------------
196 * submits an Interrupt Message
198 int usb_submit_int_msg(struct usb_device
*dev
, unsigned long pipe
,
199 void *buffer
, int transfer_len
, int interval
)
201 return submit_int_msg(dev
, pipe
, buffer
, transfer_len
, interval
);
205 * submits a control message and waits for comletion (at least timeout * 1ms)
206 * If timeout is 0, we don't wait for completion (used as example to set and
207 * clear keyboards LEDs). For data transfers, (storage transfers) we don't
208 * allow control messages with 0 timeout, by previousely resetting the flag
209 * asynch_allowed (usb_disable_asynch(1)).
210 * returns the transferred length if OK or -1 if error. The transferred length
211 * and the current status are stored in the dev->act_len and dev->status.
213 int usb_control_msg(struct usb_device
*dev
, unsigned int pipe
,
214 unsigned char request
, unsigned char requesttype
,
215 unsigned short value
, unsigned short index
,
216 void *data
, unsigned short size
, int timeout
)
218 ALLOC_CACHE_ALIGN_BUFFER(struct devrequest
, setup_packet
, 1);
221 if ((timeout
== 0) && (!asynch_allowed
)) {
222 /* request for a asynch control pipe is not allowed */
226 /* set setup command */
227 setup_packet
->requesttype
= requesttype
;
228 setup_packet
->request
= request
;
229 setup_packet
->value
= cpu_to_le16(value
);
230 setup_packet
->index
= cpu_to_le16(index
);
231 setup_packet
->length
= cpu_to_le16(size
);
232 debug("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
233 "value 0x%X index 0x%X length 0x%X\n",
234 request
, requesttype
, value
, index
, size
);
235 dev
->status
= USB_ST_NOT_PROC
; /*not yet processed */
237 err
= submit_control_msg(dev
, pipe
, data
, size
, setup_packet
);
244 * Wait for status to update until timeout expires, USB driver
245 * interrupt handler may set the status when the USB operation has
249 if (!((volatile unsigned long)dev
->status
& USB_ST_NOT_PROC
))
260 /*-------------------------------------------------------------------
261 * submits bulk message, and waits for completion. returns 0 if Ok or
263 * synchronous behavior
265 int usb_bulk_msg(struct usb_device
*dev
, unsigned int pipe
,
266 void *data
, int len
, int *actual_length
, int timeout
)
270 dev
->status
= USB_ST_NOT_PROC
; /*not yet processed */
271 if (submit_bulk_msg(dev
, pipe
, data
, len
) < 0)
274 if (!((volatile unsigned long)dev
->status
& USB_ST_NOT_PROC
))
278 *actual_length
= dev
->act_len
;
279 if (dev
->status
== 0)
286 /*-------------------------------------------------------------------
291 * returns the max packet size, depending on the pipe direction and
292 * the configurations values
294 int usb_maxpacket(struct usb_device
*dev
, unsigned long pipe
)
296 /* direction is out -> use emaxpacket out */
297 if ((pipe
& USB_DIR_IN
) == 0)
298 return dev
->epmaxpacketout
[((pipe
>>15) & 0xf)];
300 return dev
->epmaxpacketin
[((pipe
>>15) & 0xf)];
304 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
305 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
306 * when it is inlined in 1 single routine. What happens is that the register r3
307 * is used as loop-count 'i', but gets overwritten later on.
308 * This is clearly a compiler bug, but it is easier to workaround it here than
309 * to update the compiler (Occurs with at least several GCC 4.{1,2},x
310 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
312 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
315 usb_set_maxpacket_ep(struct usb_device
*dev
, int if_idx
, int ep_idx
)
318 struct usb_endpoint_descriptor
*ep
;
319 u16 ep_wMaxPacketSize
;
321 ep
= &dev
->config
.if_desc
[if_idx
].ep_desc
[ep_idx
];
323 b
= ep
->bEndpointAddress
& USB_ENDPOINT_NUMBER_MASK
;
324 ep_wMaxPacketSize
= get_unaligned(&ep
->wMaxPacketSize
);
326 if ((ep
->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) ==
327 USB_ENDPOINT_XFER_CONTROL
) {
328 /* Control => bidirectional */
329 dev
->epmaxpacketout
[b
] = ep_wMaxPacketSize
;
330 dev
->epmaxpacketin
[b
] = ep_wMaxPacketSize
;
331 debug("##Control EP epmaxpacketout/in[%d] = %d\n",
332 b
, dev
->epmaxpacketin
[b
]);
334 if ((ep
->bEndpointAddress
& 0x80) == 0) {
336 if (ep_wMaxPacketSize
> dev
->epmaxpacketout
[b
]) {
337 dev
->epmaxpacketout
[b
] = ep_wMaxPacketSize
;
338 debug("##EP epmaxpacketout[%d] = %d\n",
339 b
, dev
->epmaxpacketout
[b
]);
343 if (ep_wMaxPacketSize
> dev
->epmaxpacketin
[b
]) {
344 dev
->epmaxpacketin
[b
] = ep_wMaxPacketSize
;
345 debug("##EP epmaxpacketin[%d] = %d\n",
346 b
, dev
->epmaxpacketin
[b
]);
353 * set the max packed value of all endpoints in the given configuration
355 static int usb_set_maxpacket(struct usb_device
*dev
)
359 for (i
= 0; i
< dev
->config
.desc
.bNumInterfaces
; i
++)
360 for (ii
= 0; ii
< dev
->config
.if_desc
[i
].desc
.bNumEndpoints
; ii
++)
361 usb_set_maxpacket_ep(dev
, i
, ii
);
366 /*******************************************************************************
367 * Parse the config, located in buffer, and fills the dev->config structure.
368 * Note that all little/big endian swapping are done automatically.
369 * (wTotalLength has already been swapped and sanitized when it was read.)
371 static int usb_parse_config(struct usb_device
*dev
,
372 unsigned char *buffer
, int cfgno
)
374 struct usb_descriptor_header
*head
;
375 int index
, ifno
, epno
, curr_if_num
;
376 u16 ep_wMaxPacketSize
;
377 struct usb_interface
*if_desc
= NULL
;
383 dev
->configno
= cfgno
;
384 head
= (struct usb_descriptor_header
*) &buffer
[0];
385 if (head
->bDescriptorType
!= USB_DT_CONFIG
) {
386 printf(" ERROR: NOT USB_CONFIG_DESC %x\n",
387 head
->bDescriptorType
);
390 if (head
->bLength
!= USB_DT_CONFIG_SIZE
) {
391 printf("ERROR: Invalid USB CFG length (%d)\n", head
->bLength
);
394 memcpy(&dev
->config
, head
, USB_DT_CONFIG_SIZE
);
395 dev
->config
.no_of_if
= 0;
397 index
= dev
->config
.desc
.bLength
;
398 /* Ok the first entry must be a configuration entry,
399 * now process the others */
400 head
= (struct usb_descriptor_header
*) &buffer
[index
];
401 while (index
+ 1 < dev
->config
.desc
.wTotalLength
&& head
->bLength
) {
402 switch (head
->bDescriptorType
) {
403 case USB_DT_INTERFACE
:
404 if (head
->bLength
!= USB_DT_INTERFACE_SIZE
) {
405 printf("ERROR: Invalid USB IF length (%d)\n",
409 if (index
+ USB_DT_INTERFACE_SIZE
>
410 dev
->config
.desc
.wTotalLength
) {
411 puts("USB IF descriptor overflowed buffer!\n");
414 if (((struct usb_interface_descriptor
*) \
415 head
)->bInterfaceNumber
!= curr_if_num
) {
416 /* this is a new interface, copy new desc */
417 ifno
= dev
->config
.no_of_if
;
418 if (ifno
>= USB_MAXINTERFACES
) {
419 puts("Too many USB interfaces!\n");
420 /* try to go on with what we have */
423 if_desc
= &dev
->config
.if_desc
[ifno
];
424 dev
->config
.no_of_if
++;
425 memcpy(if_desc
, head
,
426 USB_DT_INTERFACE_SIZE
);
427 if_desc
->no_of_ep
= 0;
428 if_desc
->num_altsetting
= 1;
430 if_desc
->desc
.bInterfaceNumber
;
432 /* found alternate setting for the interface */
434 if_desc
= &dev
->config
.if_desc
[ifno
];
435 if_desc
->num_altsetting
++;
439 case USB_DT_ENDPOINT
:
440 if (head
->bLength
!= USB_DT_ENDPOINT_SIZE
&&
441 head
->bLength
!= USB_DT_ENDPOINT_AUDIO_SIZE
) {
442 printf("ERROR: Invalid USB EP length (%d)\n",
446 if (index
+ head
->bLength
>
447 dev
->config
.desc
.wTotalLength
) {
448 puts("USB EP descriptor overflowed buffer!\n");
452 puts("Endpoint descriptor out of order!\n");
455 epno
= dev
->config
.if_desc
[ifno
].no_of_ep
;
456 if_desc
= &dev
->config
.if_desc
[ifno
];
457 if (epno
>= USB_MAXENDPOINTS
) {
458 printf("Interface %d has too many endpoints!\n",
459 if_desc
->desc
.bInterfaceNumber
);
462 /* found an endpoint */
464 memcpy(&if_desc
->ep_desc
[epno
], head
,
465 USB_DT_ENDPOINT_SIZE
);
466 ep_wMaxPacketSize
= get_unaligned(&dev
->config
.\
470 put_unaligned(le16_to_cpu(ep_wMaxPacketSize
),
475 debug("if %d, ep %d\n", ifno
, epno
);
477 case USB_DT_SS_ENDPOINT_COMP
:
478 if (head
->bLength
!= USB_DT_SS_EP_COMP_SIZE
) {
479 printf("ERROR: Invalid USB EPC length (%d)\n",
483 if (index
+ USB_DT_SS_EP_COMP_SIZE
>
484 dev
->config
.desc
.wTotalLength
) {
485 puts("USB EPC descriptor overflowed buffer!\n");
488 if (ifno
< 0 || epno
< 0) {
489 puts("EPC descriptor out of order!\n");
492 if_desc
= &dev
->config
.if_desc
[ifno
];
493 memcpy(&if_desc
->ss_ep_comp_desc
[epno
], head
,
494 USB_DT_SS_EP_COMP_SIZE
);
497 if (head
->bLength
== 0)
500 debug("unknown Description Type : %x\n",
501 head
->bDescriptorType
);
505 unsigned char *ch
= (unsigned char *)head
;
508 for (i
= 0; i
< head
->bLength
; i
++)
509 debug("%02X ", *ch
++);
515 index
+= head
->bLength
;
516 head
= (struct usb_descriptor_header
*)&buffer
[index
];
521 /***********************************************************************
523 * endp: endpoint number in bits 0-3;
524 * direction flag in bit 7 (1 = IN, 0 = OUT)
526 int usb_clear_halt(struct usb_device
*dev
, int pipe
)
529 int endp
= usb_pipeendpoint(pipe
)|(usb_pipein(pipe
)<<7);
531 result
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
532 USB_REQ_CLEAR_FEATURE
, USB_RECIP_ENDPOINT
, 0,
533 endp
, NULL
, 0, USB_CNTL_TIMEOUT
* 3);
535 /* don't clear if failed */
540 * NOTE: we do not get status and verify reset was successful
541 * as some devices are reported to lock up upon this check..
544 usb_endpoint_running(dev
, usb_pipeendpoint(pipe
), usb_pipeout(pipe
));
546 /* toggle is reset on clear */
547 usb_settoggle(dev
, usb_pipeendpoint(pipe
), usb_pipeout(pipe
), 0);
552 /**********************************************************************
553 * get_descriptor type
555 static int usb_get_descriptor(struct usb_device
*dev
, unsigned char type
,
556 unsigned char index
, void *buf
, int size
)
558 return usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
559 USB_REQ_GET_DESCRIPTOR
, USB_DIR_IN
,
560 (type
<< 8) + index
, 0, buf
, size
,
564 /**********************************************************************
565 * gets len of configuration cfgno
567 int usb_get_configuration_len(struct usb_device
*dev
, int cfgno
)
570 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, 9);
571 struct usb_config_descriptor
*config
;
573 config
= (struct usb_config_descriptor
*)&buffer
[0];
574 result
= usb_get_descriptor(dev
, USB_DT_CONFIG
, cfgno
, buffer
, 9);
577 printf("unable to get descriptor, error %lX\n",
580 printf("config descriptor too short " \
581 "(expected %i, got %i)\n", 9, result
);
584 return le16_to_cpu(config
->wTotalLength
);
587 /**********************************************************************
588 * gets configuration cfgno and store it in the buffer
590 int usb_get_configuration_no(struct usb_device
*dev
, int cfgno
,
591 unsigned char *buffer
, int length
)
594 struct usb_config_descriptor
*config
;
596 config
= (struct usb_config_descriptor
*)&buffer
[0];
597 result
= usb_get_descriptor(dev
, USB_DT_CONFIG
, cfgno
, buffer
, length
);
598 debug("get_conf_no %d Result %d, wLength %d\n", cfgno
, result
,
599 le16_to_cpu(config
->wTotalLength
));
600 config
->wTotalLength
= result
; /* validated, with CPU byte order */
605 /********************************************************************
606 * set address of a device to the value in dev->devnum.
607 * This can only be done by addressing the device via the default address (0)
609 static int usb_set_address(struct usb_device
*dev
)
611 debug("set address %d\n", dev
->devnum
);
613 return usb_control_msg(dev
, usb_snddefctrl(dev
), USB_REQ_SET_ADDRESS
,
614 0, (dev
->devnum
), 0, NULL
, 0, USB_CNTL_TIMEOUT
);
617 /********************************************************************
618 * set interface number to interface
620 int usb_set_interface(struct usb_device
*dev
, int interface
, int alternate
)
622 struct usb_interface
*if_face
= NULL
;
625 for (i
= 0; i
< dev
->config
.desc
.bNumInterfaces
; i
++) {
626 if (dev
->config
.if_desc
[i
].desc
.bInterfaceNumber
== interface
) {
627 if_face
= &dev
->config
.if_desc
[i
];
632 printf("selecting invalid interface %d", interface
);
636 * We should return now for devices with only one alternate setting.
637 * According to 9.4.10 of the Universal Serial Bus Specification
638 * Revision 2.0 such devices can return with a STALL. This results in
639 * some USB sticks timeouting during initialization and then being
640 * unusable in U-Boot.
642 if (if_face
->num_altsetting
== 1)
645 ret
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
646 USB_REQ_SET_INTERFACE
, USB_RECIP_INTERFACE
,
647 alternate
, interface
, NULL
, 0,
648 USB_CNTL_TIMEOUT
* 5);
655 /********************************************************************
656 * set configuration number to configuration
658 static int usb_set_configuration(struct usb_device
*dev
, int configuration
)
661 debug("set configuration %d\n", configuration
);
662 /* set setup command */
663 res
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
664 USB_REQ_SET_CONFIGURATION
, 0,
666 NULL
, 0, USB_CNTL_TIMEOUT
);
675 /********************************************************************
676 * set protocol to protocol
678 int usb_set_protocol(struct usb_device
*dev
, int ifnum
, int protocol
)
680 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
681 USB_REQ_SET_PROTOCOL
, USB_TYPE_CLASS
| USB_RECIP_INTERFACE
,
682 protocol
, ifnum
, NULL
, 0, USB_CNTL_TIMEOUT
);
685 /********************************************************************
688 int usb_set_idle(struct usb_device
*dev
, int ifnum
, int duration
, int report_id
)
690 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
691 USB_REQ_SET_IDLE
, USB_TYPE_CLASS
| USB_RECIP_INTERFACE
,
692 (duration
<< 8) | report_id
, ifnum
, NULL
, 0, USB_CNTL_TIMEOUT
);
695 /********************************************************************
698 int usb_get_report(struct usb_device
*dev
, int ifnum
, unsigned char type
,
699 unsigned char id
, void *buf
, int size
)
701 return usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
703 USB_DIR_IN
| USB_TYPE_CLASS
| USB_RECIP_INTERFACE
,
704 (type
<< 8) + id
, ifnum
, buf
, size
, USB_CNTL_TIMEOUT
);
707 /********************************************************************
708 * get class descriptor
710 int usb_get_class_descriptor(struct usb_device
*dev
, int ifnum
,
711 unsigned char type
, unsigned char id
, void *buf
, int size
)
713 return usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
714 USB_REQ_GET_DESCRIPTOR
, USB_RECIP_INTERFACE
| USB_DIR_IN
,
715 (type
<< 8) + id
, ifnum
, buf
, size
, USB_CNTL_TIMEOUT
);
718 /********************************************************************
719 * get string index in buffer
721 static int usb_get_string(struct usb_device
*dev
, unsigned short langid
,
722 unsigned char index
, void *buf
, int size
)
727 for (i
= 0; i
< 3; ++i
) {
728 /* some devices are flaky */
729 result
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
730 USB_REQ_GET_DESCRIPTOR
, USB_DIR_IN
,
731 (USB_DT_STRING
<< 8) + index
, langid
, buf
, size
,
742 static void usb_try_string_workarounds(unsigned char *buf
, int *length
)
744 int newlength
, oldlength
= *length
;
746 for (newlength
= 2; newlength
+ 1 < oldlength
; newlength
+= 2)
747 if (!isprint(buf
[newlength
]) || buf
[newlength
+ 1])
757 static int usb_string_sub(struct usb_device
*dev
, unsigned int langid
,
758 unsigned int index
, unsigned char *buf
)
762 /* Try to read the string descriptor by asking for the maximum
763 * possible number of bytes */
764 rc
= usb_get_string(dev
, langid
, index
, buf
, 255);
766 /* If that failed try to read the descriptor length, then
767 * ask for just that many bytes */
769 rc
= usb_get_string(dev
, langid
, index
, buf
, 2);
771 rc
= usb_get_string(dev
, langid
, index
, buf
, buf
[0]);
775 if (!buf
[0] && !buf
[1])
776 usb_try_string_workarounds(buf
, &rc
);
778 /* There might be extra junk at the end of the descriptor */
782 rc
= rc
- (rc
& 1); /* force a multiple of two */
792 /********************************************************************
794 * Get string index and translate it to ascii.
795 * returns string length (> 0) or error (< 0)
797 int usb_string(struct usb_device
*dev
, int index
, char *buf
, size_t size
)
799 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf
, USB_BUFSIZ
);
804 if (size
<= 0 || !buf
|| !index
)
809 /* get langid for strings if it's not yet known */
810 if (!dev
->have_langid
) {
811 err
= usb_string_sub(dev
, 0, 0, tbuf
);
813 debug("error getting string descriptor 0 " \
814 "(error=%lx)\n", dev
->status
);
816 } else if (tbuf
[0] < 4) {
817 debug("string descriptor 0 too short\n");
820 dev
->have_langid
= -1;
821 dev
->string_langid
= tbuf
[2] | (tbuf
[3] << 8);
822 /* always use the first langid listed */
823 debug("USB device number %d default " \
824 "language ID 0x%x\n",
825 dev
->devnum
, dev
->string_langid
);
829 err
= usb_string_sub(dev
, dev
->string_langid
, index
, tbuf
);
833 size
--; /* leave room for trailing NULL char in output buffer */
834 for (idx
= 0, u
= 2; u
< err
; u
+= 2) {
837 if (tbuf
[u
+1]) /* high byte */
838 buf
[idx
++] = '?'; /* non-ASCII character */
840 buf
[idx
++] = tbuf
[u
];
848 /********************************************************************
849 * USB device handling:
850 * the USB device are static allocated [USB_MAX_DEVICE].
853 #ifndef CONFIG_DM_USB
855 /* returns a pointer to the device with the index [index].
856 * if the device is not assigned (dev->devnum==-1) returns NULL
858 struct usb_device
*usb_get_dev_index(int index
)
860 if (usb_dev
[index
].devnum
== -1)
863 return &usb_dev
[index
];
866 int usb_alloc_new_device(struct udevice
*controller
, struct usb_device
**devp
)
869 debug("New Device %d\n", dev_index
);
870 if (dev_index
== USB_MAX_DEVICE
) {
871 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE
);
874 /* default Address is 0, real addresses start with 1 */
875 usb_dev
[dev_index
].devnum
= dev_index
+ 1;
876 usb_dev
[dev_index
].maxchild
= 0;
877 for (i
= 0; i
< USB_MAXCHILDREN
; i
++)
878 usb_dev
[dev_index
].children
[i
] = NULL
;
879 usb_dev
[dev_index
].parent
= NULL
;
880 usb_dev
[dev_index
].controller
= controller
;
882 *devp
= &usb_dev
[dev_index
- 1];
888 * Free the newly created device node.
889 * Called in error cases where configuring a newly attached
890 * device fails for some reason.
892 void usb_free_device(struct udevice
*controller
)
895 debug("Freeing device node: %d\n", dev_index
);
896 memset(&usb_dev
[dev_index
], 0, sizeof(struct usb_device
));
897 usb_dev
[dev_index
].devnum
= -1;
901 * XHCI issues Enable Slot command and thereafter
902 * allocates device contexts. Provide a weak alias
903 * function for the purpose, so that XHCI overrides it
904 * and EHCI/OHCI just work out of the box.
906 __weak
int usb_alloc_device(struct usb_device
*udev
)
910 #endif /* !CONFIG_DM_USB */
912 static int usb_hub_port_reset(struct usb_device
*dev
, struct usb_device
*hub
)
915 usb_reset_root_port(dev
);
920 static int get_descriptor_len(struct usb_device
*dev
, int len
, int expect_len
)
922 __maybe_unused
struct usb_device_descriptor
*desc
;
923 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf
, USB_BUFSIZ
);
926 desc
= (struct usb_device_descriptor
*)tmpbuf
;
928 err
= usb_get_descriptor(dev
, USB_DT_DEVICE
, 0, desc
, len
);
929 if (err
< expect_len
) {
931 printf("unable to get device descriptor (error=%d)\n",
935 printf("USB device descriptor short read (expected %i, got %i)\n",
940 memcpy(&dev
->descriptor
, tmpbuf
, sizeof(dev
->descriptor
));
945 static int usb_setup_descriptor(struct usb_device
*dev
, bool do_read
)
948 * This is a Windows scheme of initialization sequence, with double
949 * reset of the device (Linux uses the same sequence)
950 * Some equipment is said to work only with such init sequence; this
951 * patch is based on the work by Alan Stern:
952 * http://sourceforge.net/mailarchive/forum.php?
953 * thread_id=5729457&forum_id=5398
957 * send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
958 * only 18 bytes long, this will terminate with a short packet. But if
959 * the maxpacket size is 8 or 16 the device may be waiting to transmit
960 * some more, or keeps on retransmitting the 8 byte header.
963 if (dev
->speed
== USB_SPEED_LOW
) {
964 dev
->descriptor
.bMaxPacketSize0
= 8;
965 dev
->maxpacketsize
= PACKET_SIZE_8
;
967 dev
->descriptor
.bMaxPacketSize0
= 64;
968 dev
->maxpacketsize
= PACKET_SIZE_64
;
970 dev
->epmaxpacketin
[0] = dev
->descriptor
.bMaxPacketSize0
;
971 dev
->epmaxpacketout
[0] = dev
->descriptor
.bMaxPacketSize0
;
973 if (do_read
&& dev
->speed
== USB_SPEED_FULL
) {
977 * Validate we've received only at least 8 bytes, not that
978 * we've received the entire descriptor. The reasoning is:
979 * - The code only uses fields in the first 8 bytes, so
980 * that's all we need to have fetched at this stage.
981 * - The smallest maxpacket size is 8 bytes. Before we know
982 * the actual maxpacket the device uses, the USB controller
983 * may only accept a single packet. Consequently we are only
984 * guaranteed to receive 1 packet (at least 8 bytes) even in
987 * At least the DWC2 controller needs to be programmed with
988 * the number of packets in addition to the number of bytes.
989 * A request for 64 bytes of data with the maxpacket guessed
990 * as 64 (above) yields a request for 1 packet.
992 err
= get_descriptor_len(dev
, 64, 8);
997 dev
->epmaxpacketin
[0] = dev
->descriptor
.bMaxPacketSize0
;
998 dev
->epmaxpacketout
[0] = dev
->descriptor
.bMaxPacketSize0
;
999 switch (dev
->descriptor
.bMaxPacketSize0
) {
1001 dev
->maxpacketsize
= PACKET_SIZE_8
;
1004 dev
->maxpacketsize
= PACKET_SIZE_16
;
1007 dev
->maxpacketsize
= PACKET_SIZE_32
;
1010 dev
->maxpacketsize
= PACKET_SIZE_64
;
1013 printf("%s: invalid max packet size\n", __func__
);
1020 static int usb_prepare_device(struct usb_device
*dev
, int addr
, bool do_read
,
1021 struct usb_device
*parent
)
1026 * Allocate usb 3.0 device context.
1027 * USB 3.0 (xHCI) protocol tries to allocate device slot
1028 * and related data structures first. This call does that.
1029 * Refer to sec 4.3.2 in xHCI spec rev1.0
1031 err
= usb_alloc_device(dev
);
1033 printf("Cannot allocate device context to get SLOT_ID\n");
1036 err
= usb_setup_descriptor(dev
, do_read
);
1039 err
= usb_hub_port_reset(dev
, parent
);
1045 err
= usb_set_address(dev
); /* set address */
1048 printf("\n USB device not accepting new address " \
1049 "(error=%lX)\n", dev
->status
);
1053 mdelay(10); /* Let the SET_ADDRESS settle */
1056 * If we haven't read device descriptor before, read it here
1057 * after device is assigned an address. This is only applicable
1061 err
= usb_setup_descriptor(dev
, true);
1069 int usb_select_config(struct usb_device
*dev
)
1071 unsigned char *tmpbuf
= NULL
;
1074 err
= get_descriptor_len(dev
, USB_DT_DEVICE_SIZE
, USB_DT_DEVICE_SIZE
);
1078 /* correct le values */
1079 le16_to_cpus(&dev
->descriptor
.bcdUSB
);
1080 le16_to_cpus(&dev
->descriptor
.idVendor
);
1081 le16_to_cpus(&dev
->descriptor
.idProduct
);
1082 le16_to_cpus(&dev
->descriptor
.bcdDevice
);
1085 * Kingston DT Ultimate 32GB USB 3.0 seems to be extremely sensitive
1086 * about this first Get Descriptor request. If there are any other
1087 * requests in the first microframe, the stick crashes. Wait about
1088 * one microframe duration here (1mS for USB 1.x , 125uS for USB 2.0).
1092 /* only support for one config for now */
1093 err
= usb_get_configuration_len(dev
, 0);
1095 tmpbuf
= (unsigned char *)malloc_cache_aligned(err
);
1099 err
= usb_get_configuration_no(dev
, 0, tmpbuf
, err
);
1102 printf("usb_new_device: Cannot read configuration, " \
1103 "skipping device %04x:%04x\n",
1104 dev
->descriptor
.idVendor
, dev
->descriptor
.idProduct
);
1108 usb_parse_config(dev
, tmpbuf
, 0);
1110 usb_set_maxpacket(dev
);
1112 * we set the default configuration here
1113 * This seems premature. If the driver wants a different configuration
1114 * it will need to select itself.
1116 err
= usb_set_configuration(dev
, dev
->config
.desc
.bConfigurationValue
);
1118 printf("failed to set default configuration " \
1119 "len %d, status %lX\n", dev
->act_len
, dev
->status
);
1124 * Wait until the Set Configuration request gets processed by the
1125 * device. This is required by at least SanDisk Cruzer Pop USB 2.0
1126 * and Kingston DT Ultimate 32GB USB 3.0 on DWC2 OTG controller.
1130 debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
1131 dev
->descriptor
.iManufacturer
, dev
->descriptor
.iProduct
,
1132 dev
->descriptor
.iSerialNumber
);
1133 memset(dev
->mf
, 0, sizeof(dev
->mf
));
1134 memset(dev
->prod
, 0, sizeof(dev
->prod
));
1135 memset(dev
->serial
, 0, sizeof(dev
->serial
));
1136 if (dev
->descriptor
.iManufacturer
)
1137 usb_string(dev
, dev
->descriptor
.iManufacturer
,
1138 dev
->mf
, sizeof(dev
->mf
));
1139 if (dev
->descriptor
.iProduct
)
1140 usb_string(dev
, dev
->descriptor
.iProduct
,
1141 dev
->prod
, sizeof(dev
->prod
));
1142 if (dev
->descriptor
.iSerialNumber
)
1143 usb_string(dev
, dev
->descriptor
.iSerialNumber
,
1144 dev
->serial
, sizeof(dev
->serial
));
1145 debug("Manufacturer %s\n", dev
->mf
);
1146 debug("Product %s\n", dev
->prod
);
1147 debug("SerialNumber %s\n", dev
->serial
);
1152 int usb_setup_device(struct usb_device
*dev
, bool do_read
,
1153 struct usb_device
*parent
)
1158 /* We still haven't set the Address yet */
1162 ret
= usb_prepare_device(dev
, addr
, do_read
, parent
);
1165 ret
= usb_select_config(dev
);
1170 #ifndef CONFIG_DM_USB
1172 * By the time we get here, the device has gotten a new device ID
1173 * and is in the default state. We need to identify the thing and
1174 * get the ball rolling..
1176 * Returns 0 for success, != 0 for error.
1178 int usb_new_device(struct usb_device
*dev
)
1180 bool do_read
= true;
1184 * XHCI needs to issue a Address device command to setup
1185 * proper device context structures, before it can interact
1186 * with the device. So a get_descriptor will fail before any
1187 * of that is done for XHCI unlike EHCI.
1189 #ifdef CONFIG_USB_XHCI_HCD
1192 err
= usb_setup_device(dev
, do_read
, dev
->parent
);
1196 /* Now probe if the device is a hub */
1197 err
= usb_hub_probe(dev
, 0);
1206 int board_usb_init(int index
, enum usb_init_type init
)
1212 int board_usb_cleanup(int index
, enum usb_init_type init
)
1217 bool usb_device_has_child_on_port(struct usb_device
*parent
, int port
)
1219 #ifdef CONFIG_DM_USB
1222 return parent
->children
[port
] != NULL
;
1226 #ifdef CONFIG_DM_USB
1227 void usb_find_usb2_hub_address_port(struct usb_device
*udev
,
1228 uint8_t *hub_address
, uint8_t *hub_port
)
1230 struct udevice
*parent
;
1231 struct usb_device
*uparent
, *ttdev
;
1234 * When called from usb-uclass.c: usb_scan_device() udev->dev points
1235 * to the parent udevice, not the actual udevice belonging to the
1236 * udev as the device is not instantiated yet. So when searching
1237 * for the first usb-2 parent start with udev->dev not
1238 * udev->dev->parent .
1242 uparent
= dev_get_parent_priv(parent
);
1244 while (uparent
->speed
!= USB_SPEED_HIGH
) {
1245 struct udevice
*dev
= parent
;
1247 if (device_get_uclass_id(dev
->parent
) != UCLASS_USB_HUB
) {
1248 printf("Error: Cannot find high speed parent of usb-1 device\n");
1254 ttdev
= dev_get_parent_priv(dev
);
1255 parent
= dev
->parent
;
1256 uparent
= dev_get_parent_priv(parent
);
1258 *hub_address
= uparent
->devnum
;
1259 *hub_port
= ttdev
->portnr
;
1262 void usb_find_usb2_hub_address_port(struct usb_device
*udev
,
1263 uint8_t *hub_address
, uint8_t *hub_port
)
1265 /* Find out the nearest parent which is high speed */
1266 while (udev
->parent
->parent
!= NULL
)
1267 if (udev
->parent
->speed
!= USB_SPEED_HIGH
) {
1268 udev
= udev
->parent
;
1270 *hub_address
= udev
->parent
->devnum
;
1271 *hub_port
= udev
->portnr
;
1275 printf("Error: Cannot find high speed parent of usb-1 device\n");