Merge https://gitlab.denx.de/u-boot/custodians/u-boot-i2c
[platform/kernel/u-boot.git] / common / usb.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Most of this source has been derived from the Linux USB
4  * 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
17  */
18
19 /*
20  * How it works:
21  *
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
24  * device should work.
25  *
26  * For each transfer (except "Interrupt") we wait for completion.
27  */
28 #include <common.h>
29 #include <command.h>
30 #include <dm.h>
31 #include <memalign.h>
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>
37 #include <errno.h>
38 #include <usb.h>
39
40 #define USB_BUFSIZ      512
41
42 static int asynch_allowed;
43 char usb_started; /* flag for the started/stopped USB status */
44
45 #if !CONFIG_IS_ENABLED(DM_USB)
46 static struct usb_device usb_dev[USB_MAX_DEVICE];
47 static int dev_index;
48
49 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
50 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1
51 #endif
52
53 /***************************************************************************
54  * Init USB Device
55  */
56 int usb_init(void)
57 {
58         void *ctrl;
59         struct usb_device *dev;
60         int i, start_index = 0;
61         int controllers_initialized = 0;
62         int ret;
63
64         dev_index = 0;
65         asynch_allowed = 1;
66         usb_hub_reset();
67
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;
72         }
73
74         /* init low_level USB */
75         for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
76                 /* init low_level USB */
77                 printf("USB%d:   ", i);
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++;
82                         continue;
83                 }
84
85                 if (ret) {              /* Other error. */
86                         puts("lowlevel init failed\n");
87                         continue;
88                 }
89                 /*
90                  * lowlevel init is OK, now scan the bus for devices
91                  * i.e. search HUBs and configure them
92                  */
93                 controllers_initialized++;
94                 start_index = dev_index;
95                 printf("scanning bus %d for devices... ", i);
96                 ret = usb_alloc_new_device(ctrl, &dev);
97                 if (ret)
98                         break;
99
100                 /*
101                  * device 0 is always present
102                  * (root hub, so let it analyze)
103                  */
104                 ret = usb_new_device(dev);
105                 if (ret)
106                         usb_free_device(dev->controller);
107
108                 if (start_index == dev_index) {
109                         puts("No USB Device found\n");
110                         continue;
111                 } else {
112                         printf("%d USB Device(s) found\n",
113                                 dev_index - start_index);
114                 }
115
116                 usb_started = 1;
117         }
118
119         debug("scan end\n");
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");
123
124         return usb_started ? 0 : -ENODEV;
125 }
126
127 /******************************************************************************
128  * Stop USB this stops the LowLevel Part and deregisters USB devices.
129  */
130 int usb_stop(void)
131 {
132         int i;
133
134         if (usb_started) {
135                 asynch_allowed = 1;
136                 usb_started = 0;
137                 usb_hub_reset();
138
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);
142                 }
143         }
144
145         return 0;
146 }
147
148 /******************************************************************************
149  * Detect if a USB device has been plugged or unplugged.
150  */
151 int usb_detect_change(void)
152 {
153         int i, j;
154         int change = 0;
155
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;
159
160                         if (usb_get_port_status(&usb_dev[j], i + 1,
161                                                 &status) < 0)
162                                 /* USB request failed */
163                                 continue;
164
165                         if (le16_to_cpu(status.wPortChange) &
166                             USB_PORT_STAT_C_CONNECTION)
167                                 change++;
168                 }
169         }
170
171         return change;
172 }
173
174 /*
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.
178  */
179 int usb_disable_asynch(int disable)
180 {
181         int old_value = asynch_allowed;
182
183         asynch_allowed = !disable;
184         return old_value;
185 }
186 #endif /* !CONFIG_IS_ENABLED(DM_USB) */
187
188
189 /*-------------------------------------------------------------------
190  * Message wrappers.
191  *
192  */
193
194 /*
195  * submits an Interrupt Message
196  */
197 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
198                         void *buffer, int transfer_len, int interval)
199 {
200         return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
201 }
202
203 /*
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.
211  */
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)
216 {
217         ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1);
218         int err;
219
220         if ((timeout == 0) && (!asynch_allowed)) {
221                 /* request for a asynch control pipe is not allowed */
222                 return -EINVAL;
223         }
224
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 */
235
236         err = submit_control_msg(dev, pipe, data, size, setup_packet);
237         if (err < 0)
238                 return err;
239         if (timeout == 0)
240                 return (int)size;
241
242         /*
243          * Wait for status to update until timeout expires, USB driver
244          * interrupt handler may set the status when the USB operation has
245          * been completed.
246          */
247         while (timeout--) {
248                 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
249                         break;
250                 mdelay(1);
251         }
252         if (dev->status)
253                 return -1;
254
255         return dev->act_len;
256
257 }
258
259 /*-------------------------------------------------------------------
260  * submits bulk message, and waits for completion. returns 0 if Ok or
261  * negative if Error.
262  * synchronous behavior
263  */
264 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
265                         void *data, int len, int *actual_length, int timeout)
266 {
267         if (len < 0)
268                 return -EINVAL;
269         dev->status = USB_ST_NOT_PROC; /*not yet processed */
270         if (submit_bulk_msg(dev, pipe, data, len) < 0)
271                 return -EIO;
272         while (timeout--) {
273                 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
274                         break;
275                 mdelay(1);
276         }
277         *actual_length = dev->act_len;
278         if (dev->status == 0)
279                 return 0;
280         else
281                 return -EIO;
282 }
283
284
285 /*-------------------------------------------------------------------
286  * Max Packet stuff
287  */
288
289 /*
290  * returns the max packet size, depending on the pipe direction and
291  * the configurations values
292  */
293 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
294 {
295         /* direction is out -> use emaxpacket out */
296         if ((pipe & USB_DIR_IN) == 0)
297                 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
298         else
299                 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
300 }
301
302 /*
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)
310  *
311  * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
312  */
313 static void noinline
314 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
315 {
316         int b;
317         struct usb_endpoint_descriptor *ep;
318         u16 ep_wMaxPacketSize;
319
320         ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
321
322         b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
323         ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
324
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]);
332         } else {
333                 if ((ep->bEndpointAddress & 0x80) == 0) {
334                         /* OUT Endpoint */
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]);
339                         }
340                 } else {
341                         /* IN Endpoint */
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]);
346                         }
347                 } /* if out */
348         } /* if control */
349 }
350
351 /*
352  * set the max packed value of all endpoints in the given configuration
353  */
354 static int usb_set_maxpacket(struct usb_device *dev)
355 {
356         int i, ii;
357
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);
361
362         return 0;
363 }
364
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.)
369  */
370 static int usb_parse_config(struct usb_device *dev,
371                         unsigned char *buffer, int cfgno)
372 {
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;
377
378         ifno = -1;
379         epno = -1;
380         curr_if_num = -1;
381
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);
387                 return -EINVAL;
388         }
389         if (head->bLength != USB_DT_CONFIG_SIZE) {
390                 printf("ERROR: Invalid USB CFG length (%d)\n", head->bLength);
391                 return -EINVAL;
392         }
393         memcpy(&dev->config, head, USB_DT_CONFIG_SIZE);
394         dev->config.no_of_if = 0;
395
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",
405                                         head->bLength);
406                                 break;
407                         }
408                         if (index + USB_DT_INTERFACE_SIZE >
409                             dev->config.desc.wTotalLength) {
410                                 puts("USB IF descriptor overflowed buffer!\n");
411                                 break;
412                         }
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 */
420                                         return -EINVAL;
421                                 }
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;
428                                 curr_if_num =
429                                      if_desc->desc.bInterfaceNumber;
430                         } else {
431                                 /* found alternate setting for the interface */
432                                 if (ifno >= 0) {
433                                         if_desc = &dev->config.if_desc[ifno];
434                                         if_desc->num_altsetting++;
435                                 }
436                         }
437                         break;
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",
442                                         head->bLength);
443                                 break;
444                         }
445                         if (index + head->bLength >
446                             dev->config.desc.wTotalLength) {
447                                 puts("USB EP descriptor overflowed buffer!\n");
448                                 break;
449                         }
450                         if (ifno < 0) {
451                                 puts("Endpoint descriptor out of order!\n");
452                                 break;
453                         }
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);
459                                 return -EINVAL;
460                         }
461                         /* found an endpoint */
462                         if_desc->no_of_ep++;
463                         memcpy(&if_desc->ep_desc[epno], head,
464                                 USB_DT_ENDPOINT_SIZE);
465                         ep_wMaxPacketSize = get_unaligned(&dev->config.\
466                                                         if_desc[ifno].\
467                                                         ep_desc[epno].\
468                                                         wMaxPacketSize);
469                         put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
470                                         &dev->config.\
471                                         if_desc[ifno].\
472                                         ep_desc[epno].\
473                                         wMaxPacketSize);
474                         debug("if %d, ep %d\n", ifno, epno);
475                         break;
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",
479                                         head->bLength);
480                                 break;
481                         }
482                         if (index + USB_DT_SS_EP_COMP_SIZE >
483                             dev->config.desc.wTotalLength) {
484                                 puts("USB EPC descriptor overflowed buffer!\n");
485                                 break;
486                         }
487                         if (ifno < 0 || epno < 0) {
488                                 puts("EPC descriptor out of order!\n");
489                                 break;
490                         }
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);
494                         break;
495                 default:
496                         if (head->bLength == 0)
497                                 return -EINVAL;
498
499                         debug("unknown Description Type : %x\n",
500                               head->bDescriptorType);
501
502 #ifdef DEBUG
503                         {
504                                 unsigned char *ch = (unsigned char *)head;
505                                 int i;
506
507                                 for (i = 0; i < head->bLength; i++)
508                                         debug("%02X ", *ch++);
509                                 debug("\n\n\n");
510                         }
511 #endif
512                         break;
513                 }
514                 index += head->bLength;
515                 head = (struct usb_descriptor_header *)&buffer[index];
516         }
517         return 0;
518 }
519
520 /***********************************************************************
521  * Clears an endpoint
522  * endp: endpoint number in bits 0-3;
523  * direction flag in bit 7 (1 = IN, 0 = OUT)
524  */
525 int usb_clear_halt(struct usb_device *dev, int pipe)
526 {
527         int result;
528         int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
529
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);
533
534         /* don't clear if failed */
535         if (result < 0)
536                 return result;
537
538         /*
539          * NOTE: we do not get status and verify reset was successful
540          * as some devices are reported to lock up upon this check..
541          */
542
543         usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
544
545         /* toggle is reset on clear */
546         usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
547         return 0;
548 }
549
550
551 /**********************************************************************
552  * get_descriptor type
553  */
554 static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
555                         unsigned char index, void *buf, int size)
556 {
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,
560                                USB_CNTL_TIMEOUT);
561 }
562
563 /**********************************************************************
564  * gets len of configuration cfgno
565  */
566 int usb_get_configuration_len(struct usb_device *dev, int cfgno)
567 {
568         int result;
569         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, 9);
570         struct usb_config_descriptor *config;
571
572         config = (struct usb_config_descriptor *)&buffer[0];
573         result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
574         if (result < 9) {
575                 if (result < 0)
576                         printf("unable to get descriptor, error %lX\n",
577                                 dev->status);
578                 else
579                         printf("config descriptor too short " \
580                                 "(expected %i, got %i)\n", 9, result);
581                 return -EIO;
582         }
583         return le16_to_cpu(config->wTotalLength);
584 }
585
586 /**********************************************************************
587  * gets configuration cfgno and store it in the buffer
588  */
589 int usb_get_configuration_no(struct usb_device *dev, int cfgno,
590                              unsigned char *buffer, int length)
591 {
592         int result;
593         struct usb_config_descriptor *config;
594
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 */
600
601         return result;
602 }
603
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)
607  */
608 static int usb_set_address(struct usb_device *dev)
609 {
610         debug("set address %d\n", dev->devnum);
611
612         return usb_control_msg(dev, usb_snddefctrl(dev), USB_REQ_SET_ADDRESS,
613                                0, (dev->devnum), 0, NULL, 0, USB_CNTL_TIMEOUT);
614 }
615
616 /********************************************************************
617  * set interface number to interface
618  */
619 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
620 {
621         struct usb_interface *if_face = NULL;
622         int ret, i;
623
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];
627                         break;
628                 }
629         }
630         if (!if_face) {
631                 printf("selecting invalid interface %d", interface);
632                 return -EINVAL;
633         }
634         /*
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.
640          */
641         if (if_face->num_altsetting == 1)
642                 return 0;
643
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);
648         if (ret < 0)
649                 return ret;
650
651         return 0;
652 }
653
654 /********************************************************************
655  * set configuration number to configuration
656  */
657 static int usb_set_configuration(struct usb_device *dev, int configuration)
658 {
659         int res;
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,
664                                 configuration, 0,
665                                 NULL, 0, USB_CNTL_TIMEOUT);
666         if (res == 0) {
667                 dev->toggle[0] = 0;
668                 dev->toggle[1] = 0;
669                 return 0;
670         } else
671                 return -EIO;
672 }
673
674 /********************************************************************
675  * set protocol to protocol
676  */
677 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
678 {
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);
682 }
683
684 /********************************************************************
685  * set idle
686  */
687 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
688 {
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);
692 }
693
694 /********************************************************************
695  * get report
696  */
697 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
698                    unsigned char id, void *buf, int size)
699 {
700         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
701                         USB_REQ_GET_REPORT,
702                         USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
703                         (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
704 }
705
706 /********************************************************************
707  * get class descriptor
708  */
709 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
710                 unsigned char type, unsigned char id, void *buf, int size)
711 {
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);
715 }
716
717 /********************************************************************
718  * get string index in buffer
719  */
720 static int usb_get_string(struct usb_device *dev, unsigned short langid,
721                    unsigned char index, void *buf, int size)
722 {
723         int i;
724         int result;
725
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,
731                         USB_CNTL_TIMEOUT);
732
733                 if (result > 0)
734                         break;
735         }
736
737         return result;
738 }
739
740
741 static void usb_try_string_workarounds(unsigned char *buf, int *length)
742 {
743         int newlength, oldlength = *length;
744
745         for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
746                 if (!isprint(buf[newlength]) || buf[newlength + 1])
747                         break;
748
749         if (newlength > 2) {
750                 buf[0] = newlength;
751                 *length = newlength;
752         }
753 }
754
755
756 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
757                 unsigned int index, unsigned char *buf)
758 {
759         int rc;
760
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);
764
765         /* If that failed try to read the descriptor length, then
766          * ask for just that many bytes */
767         if (rc < 2) {
768                 rc = usb_get_string(dev, langid, index, buf, 2);
769                 if (rc == 2)
770                         rc = usb_get_string(dev, langid, index, buf, buf[0]);
771         }
772
773         if (rc >= 2) {
774                 if (!buf[0] && !buf[1])
775                         usb_try_string_workarounds(buf, &rc);
776
777                 /* There might be extra junk at the end of the descriptor */
778                 if (buf[0] < rc)
779                         rc = buf[0];
780
781                 rc = rc - (rc & 1); /* force a multiple of two */
782         }
783
784         if (rc < 2)
785                 rc = -EINVAL;
786
787         return rc;
788 }
789
790
791 /********************************************************************
792  * usb_string:
793  * Get string index and translate it to ascii.
794  * returns string length (> 0) or error (< 0)
795  */
796 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
797 {
798         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ);
799         unsigned char *tbuf;
800         int err;
801         unsigned int u, idx;
802
803         if (size <= 0 || !buf || !index)
804                 return -EINVAL;
805         buf[0] = 0;
806         tbuf = &mybuf[0];
807
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);
811                 if (err < 0) {
812                         debug("error getting string descriptor 0 " \
813                               "(error=%lx)\n", dev->status);
814                         return -EIO;
815                 } else if (tbuf[0] < 4) {
816                         debug("string descriptor 0 too short\n");
817                         return -EIO;
818                 } else {
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);
825                 }
826         }
827
828         err = usb_string_sub(dev, dev->string_langid, index, tbuf);
829         if (err < 0)
830                 return err;
831
832         size--;         /* leave room for trailing NULL char in output buffer */
833         for (idx = 0, u = 2; u < err; u += 2) {
834                 if (idx >= size)
835                         break;
836                 if (tbuf[u+1])                  /* high byte */
837                         buf[idx++] = '?';  /* non-ASCII character */
838                 else
839                         buf[idx++] = tbuf[u];
840         }
841         buf[idx] = 0;
842         err = idx;
843         return err;
844 }
845
846
847 /********************************************************************
848  * USB device handling:
849  * the USB device are static allocated [USB_MAX_DEVICE].
850  */
851
852 #if !CONFIG_IS_ENABLED(DM_USB)
853
854 /* returns a pointer to the device with the index [index].
855  * if the device is not assigned (dev->devnum==-1) returns NULL
856  */
857 struct usb_device *usb_get_dev_index(int index)
858 {
859         if (usb_dev[index].devnum == -1)
860                 return NULL;
861         else
862                 return &usb_dev[index];
863 }
864
865 int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp)
866 {
867         int i;
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);
871                 return -ENOSPC;
872         }
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;
880         dev_index++;
881         *devp = &usb_dev[dev_index - 1];
882
883         return 0;
884 }
885
886 /*
887  * Free the newly created device node.
888  * Called in error cases where configuring a newly attached
889  * device fails for some reason.
890  */
891 void usb_free_device(struct udevice *controller)
892 {
893         dev_index--;
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;
897 }
898
899 /*
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.
904  */
905 __weak int usb_alloc_device(struct usb_device *udev)
906 {
907         return 0;
908 }
909 #endif /* !CONFIG_IS_ENABLED(DM_USB) */
910
911 static int usb_hub_port_reset(struct usb_device *dev, struct usb_device *hub)
912 {
913         if (!hub)
914                 usb_reset_root_port(dev);
915
916         return 0;
917 }
918
919 static int get_descriptor_len(struct usb_device *dev, int len, int expect_len)
920 {
921         __maybe_unused struct usb_device_descriptor *desc;
922         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
923         int err;
924
925         desc = (struct usb_device_descriptor *)tmpbuf;
926
927         err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, len);
928         if (err < expect_len) {
929                 if (err < 0) {
930                         printf("unable to get device descriptor (error=%d)\n",
931                                 err);
932                         return err;
933                 } else {
934                         printf("USB device descriptor short read (expected %i, got %i)\n",
935                                 expect_len, err);
936                         return -EIO;
937                 }
938         }
939         memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor));
940
941         return 0;
942 }
943
944 static int usb_setup_descriptor(struct usb_device *dev, bool do_read)
945 {
946         /*
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
953          */
954
955         /*
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.
960          */
961
962         if (dev->speed == USB_SPEED_LOW) {
963                 dev->descriptor.bMaxPacketSize0 = 8;
964                 dev->maxpacketsize = PACKET_SIZE_8;
965         } else {
966                 dev->descriptor.bMaxPacketSize0 = 64;
967                 dev->maxpacketsize = PACKET_SIZE_64;
968         }
969         dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
970         dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
971
972         if (do_read && dev->speed == USB_SPEED_FULL) {
973                 int err;
974
975                 /*
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
984                  *   a non-error case.
985                  *
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.
990                  */
991                 err = get_descriptor_len(dev, 64, 8);
992                 if (err)
993                         return err;
994         }
995
996         dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
997         dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
998         switch (dev->descriptor.bMaxPacketSize0) {
999         case 8:
1000                 dev->maxpacketsize  = PACKET_SIZE_8;
1001                 break;
1002         case 16:
1003                 dev->maxpacketsize = PACKET_SIZE_16;
1004                 break;
1005         case 32:
1006                 dev->maxpacketsize = PACKET_SIZE_32;
1007                 break;
1008         case 64:
1009                 dev->maxpacketsize = PACKET_SIZE_64;
1010                 break;
1011         default:
1012                 printf("%s: invalid max packet size\n", __func__);
1013                 return -EIO;
1014         }
1015
1016         return 0;
1017 }
1018
1019 static int usb_prepare_device(struct usb_device *dev, int addr, bool do_read,
1020                               struct usb_device *parent)
1021 {
1022         int err;
1023
1024         /*
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
1029          */
1030         err = usb_alloc_device(dev);
1031         if (err) {
1032                 printf("Cannot allocate device context to get SLOT_ID\n");
1033                 return err;
1034         }
1035         err = usb_setup_descriptor(dev, do_read);
1036         if (err)
1037                 return err;
1038         err = usb_hub_port_reset(dev, parent);
1039         if (err)
1040                 return err;
1041
1042         dev->devnum = addr;
1043
1044         err = usb_set_address(dev); /* set address */
1045
1046         if (err < 0) {
1047                 printf("\n      USB device not accepting new address " \
1048                         "(error=%lX)\n", dev->status);
1049                 return err;
1050         }
1051
1052         mdelay(10);     /* Let the SET_ADDRESS settle */
1053
1054         /*
1055          * If we haven't read device descriptor before, read it here
1056          * after device is assigned an address. This is only applicable
1057          * to xHCI so far.
1058          */
1059         if (!do_read) {
1060                 err = usb_setup_descriptor(dev, true);
1061                 if (err)
1062                         return err;
1063         }
1064
1065         return 0;
1066 }
1067
1068 int usb_select_config(struct usb_device *dev)
1069 {
1070         unsigned char *tmpbuf = NULL;
1071         int err;
1072
1073         err = get_descriptor_len(dev, USB_DT_DEVICE_SIZE, USB_DT_DEVICE_SIZE);
1074         if (err)
1075                 return err;
1076
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);
1082
1083         /*
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).
1088          */
1089         mdelay(1);
1090
1091         /* only support for one config for now */
1092         err = usb_get_configuration_len(dev, 0);
1093         if (err >= 0) {
1094                 tmpbuf = (unsigned char *)malloc_cache_aligned(err);
1095                 if (!tmpbuf)
1096                         err = -ENOMEM;
1097                 else
1098                         err = usb_get_configuration_no(dev, 0, tmpbuf, err);
1099         }
1100         if (err < 0) {
1101                 printf("usb_new_device: Cannot read configuration, " \
1102                        "skipping device %04x:%04x\n",
1103                        dev->descriptor.idVendor, dev->descriptor.idProduct);
1104                 free(tmpbuf);
1105                 return err;
1106         }
1107         usb_parse_config(dev, tmpbuf, 0);
1108         free(tmpbuf);
1109         usb_set_maxpacket(dev);
1110         /*
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.
1114          */
1115         err = usb_set_configuration(dev, dev->config.desc.bConfigurationValue);
1116         if (err < 0) {
1117                 printf("failed to set default configuration " \
1118                         "len %d, status %lX\n", dev->act_len, dev->status);
1119                 return err;
1120         }
1121
1122         /*
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.
1126          */
1127         mdelay(10);
1128
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);
1147
1148         return 0;
1149 }
1150
1151 int usb_setup_device(struct usb_device *dev, bool do_read,
1152                      struct usb_device *parent)
1153 {
1154         int addr;
1155         int ret;
1156
1157         /* We still haven't set the Address yet */
1158         addr = dev->devnum;
1159         dev->devnum = 0;
1160
1161         ret = usb_prepare_device(dev, addr, do_read, parent);
1162         if (ret)
1163                 return ret;
1164         ret = usb_select_config(dev);
1165
1166         return ret;
1167 }
1168
1169 #if !CONFIG_IS_ENABLED(DM_USB)
1170 /*
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..
1174  *
1175  * Returns 0 for success, != 0 for error.
1176  */
1177 int usb_new_device(struct usb_device *dev)
1178 {
1179         bool do_read = true;
1180         int err;
1181
1182         /*
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.
1187          */
1188 #ifdef CONFIG_USB_XHCI_HCD
1189         do_read = false;
1190 #endif
1191         err = usb_setup_device(dev, do_read, dev->parent);
1192         if (err)
1193                 return err;
1194
1195         /* Now probe if the device is a hub */
1196         err = usb_hub_probe(dev, 0);
1197         if (err < 0)
1198                 return err;
1199
1200         return 0;
1201 }
1202 #endif
1203
1204 __weak
1205 int board_usb_init(int index, enum usb_init_type init)
1206 {
1207         return 0;
1208 }
1209
1210 __weak
1211 int board_usb_cleanup(int index, enum usb_init_type init)
1212 {
1213         return 0;
1214 }
1215
1216 bool usb_device_has_child_on_port(struct usb_device *parent, int port)
1217 {
1218 #if CONFIG_IS_ENABLED(DM_USB)
1219         return false;
1220 #else
1221         return parent->children[port] != NULL;
1222 #endif
1223 }
1224
1225 #if CONFIG_IS_ENABLED(DM_USB)
1226 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1227                                uint8_t *hub_address, uint8_t *hub_port)
1228 {
1229         struct udevice *parent;
1230         struct usb_device *uparent, *ttdev;
1231
1232         /*
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 .
1238          */
1239         ttdev = udev;
1240         parent = udev->dev;
1241         uparent = dev_get_parent_priv(parent);
1242
1243         while (uparent->speed != USB_SPEED_HIGH) {
1244                 struct udevice *dev = parent;
1245
1246                 if (device_get_uclass_id(dev->parent) != UCLASS_USB_HUB) {
1247                         printf("Error: Cannot find high speed parent of usb-1 device\n");
1248                         *hub_address = 0;
1249                         *hub_port = 0;
1250                         return;
1251                 }
1252
1253                 ttdev = dev_get_parent_priv(dev);
1254                 parent = dev->parent;
1255                 uparent = dev_get_parent_priv(parent);
1256         }
1257         *hub_address = uparent->devnum;
1258         *hub_port = ttdev->portnr;
1259 }
1260 #else
1261 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1262                                uint8_t *hub_address, uint8_t *hub_port)
1263 {
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;
1268                 } else {
1269                         *hub_address = udev->parent->devnum;
1270                         *hub_port = udev->portnr;
1271                         return;
1272                 }
1273
1274         printf("Error: Cannot find high speed parent of usb-1 device\n");
1275         *hub_address = 0;
1276         *hub_port = 0;
1277 }
1278 #endif
1279
1280
1281 /* EOF */