common/usb.c

   1 /*
   2  * Most of this source has been derived from the Linux USB
   3  * project:
   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)
  13  *
  14  * Adapted for U-Boot:
  15  * (C) Copyright 2001 Denis Peter, MPL AG Switzerland
  16  *
  17  * SPDX-License-Identifier:     GPL-2.0+
  18  */
  19
  20 /*
  21  * How it works:
  22  *
  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
  25  * device should work.
  26  *
  27  * For each transfer (except "Interrupt") we wait for completion.
  28  */
  29 #include <common.h>
  30 #include <command.h>
  31 #include <dm.h>
  32 #include <memalign.h>
  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>
  38 #include <errno.h>
  39 #include <usb.h>
  40
  41 #define USB_BUFSIZ      512
  42
  43 static int asynch_allowed;
  44 char usb_started; /* flag for the started/stopped USB status */
  45
  46 #ifndef CONFIG_DM_USB
  47 static struct usb_device usb_dev[USB_MAX_DEVICE];
  48 static int dev_index;
  49
  50 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
  51 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1
  52 #endif
  53
  54 /***************************************************************************
  55  * Init USB Device
  56  */
  57 int usb_init(void)
  58 {
  59         void *ctrl;
  60         struct usb_device *dev;
  61         int i, start_index = 0;
  62         int controllers_initialized = 0;
  63         int ret;
  64
  65         dev_index = 0;
  66         asynch_allowed = 1;
  67         usb_hub_reset();
  68
  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;
  73         }
  74
  75         /* init low_level USB */
  76         for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
  77                 /* init low_level USB */
  78                 printf("USB%d:   ", i);
  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++;
  83                         continue;
  84                 }
  85
  86                 if (ret) {              /* Other error. */
  87                         puts("lowlevel init failed\n");
  88                         continue;
  89                 }
  90                 /*
  91                  * lowlevel init is OK, now scan the bus for devices
  92                  * i.e. search HUBs and configure them
  93                  */
  94                 controllers_initialized++;
  95                 start_index = dev_index;
  96                 printf("scanning bus %d for devices... ", i);
  97                 ret = usb_alloc_new_device(ctrl, &dev);
  98                 if (ret)
  99                         break;
 100
 101                 /*
 102                  * device 0 is always present
 103                  * (root hub, so let it analyze)
 104                  */
 105                 ret = usb_new_device(dev);
 106                 if (ret)
 107                         usb_free_device(dev->controller);
 108
 109                 if (start_index == dev_index) {
 110                         puts("No USB Device found\n");
 111                         continue;
 112                 } else {
 113                         printf("%d USB Device(s) found\n",
 114                                 dev_index - start_index);
 115                 }
 116
 117                 usb_started = 1;
 118         }
 119
 120         debug("scan end\n");
 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");
 124
 125         return usb_started ? 0 : -ENODEV;
 126 }
 127
 128 /******************************************************************************
 129  * Stop USB this stops the LowLevel Part and deregisters USB devices.
 130  */
 131 int usb_stop(void)
 132 {
 133         int i;
 134
 135         if (usb_started) {
 136                 asynch_allowed = 1;
 137                 usb_started = 0;
 138                 usb_hub_reset();
 139
 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);
 143                 }
 144         }
 145
 146         return 0;
 147 }
 148
 149 /******************************************************************************
 150  * Detect if a USB device has been plugged or unplugged.
 151  */
 152 int usb_detect_change(void)
 153 {
 154         int i, j;
 155         int change = 0;
 156
 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;
 160
 161                         if (usb_get_port_status(&usb_dev[j], i + 1,
 162                                                 &status) < 0)
 163                                 /* USB request failed */
 164                                 continue;
 165
 166                         if (le16_to_cpu(status.wPortChange) &
 167                             USB_PORT_STAT_C_CONNECTION)
 168                                 change++;
 169                 }
 170         }
 171
 172         return change;
 173 }
 174
 175 /*
 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.
 179  */
 180 int usb_disable_asynch(int disable)
 181 {
 182         int old_value = asynch_allowed;
 183
 184         asynch_allowed = !disable;
 185         return old_value;
 186 }
 187 #endif /* !CONFIG_DM_USB */
 188
 189
 190 /*-------------------------------------------------------------------
 191  * Message wrappers.
 192  *
 193  */
 194
 195 /*
 196  * submits an Interrupt Message
 197  */
 198 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
 199                         void *buffer, int transfer_len, int interval)
 200 {
 201         return submit_int_msg(dev, pipe, buffer, transfer_len, interval);
 202 }
 203
 204 /*
 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.
 212  */
 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)
 217 {
 218         ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1);
 219         int err;
 220
 221         if ((timeout == 0) && (!asynch_allowed)) {
 222                 /* request for a asynch control pipe is not allowed */
 223                 return -EINVAL;
 224         }
 225
 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 */
 236
 237         err = submit_control_msg(dev, pipe, data, size, setup_packet);
 238         if (err < 0)
 239                 return err;
 240         if (timeout == 0)
 241                 return (int)size;
 242
 243         /*
 244          * Wait for status to update until timeout expires, USB driver
 245          * interrupt handler may set the status when the USB operation has
 246          * been completed.
 247          */
 248         while (timeout--) {
 249                 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
 250                         break;
 251                 mdelay(1);
 252         }
 253         if (dev->status)
 254                 return -1;
 255
 256         return dev->act_len;
 257
 258 }
 259
 260 /*-------------------------------------------------------------------
 261  * submits bulk message, and waits for completion. returns 0 if Ok or
 262  * negative if Error.
 263  * synchronous behavior
 264  */
 265 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
 266                         void *data, int len, int *actual_length, int timeout)
 267 {
 268         if (len < 0)
 269                 return -EINVAL;
 270         dev->status = USB_ST_NOT_PROC; /*not yet processed */
 271         if (submit_bulk_msg(dev, pipe, data, len) < 0)
 272                 return -EIO;
 273         while (timeout--) {
 274                 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
 275                         break;
 276                 mdelay(1);
 277         }
 278         *actual_length = dev->act_len;
 279         if (dev->status == 0)
 280                 return 0;
 281         else
 282                 return -EIO;
 283 }
 284
 285
 286 /*-------------------------------------------------------------------
 287  * Max Packet stuff
 288  */
 289
 290 /*
 291  * returns the max packet size, depending on the pipe direction and
 292  * the configurations values
 293  */
 294 int usb_maxpacket(struct usb_device *dev, unsigned long pipe)
 295 {
 296         /* direction is out -> use emaxpacket out */
 297         if ((pipe & USB_DIR_IN) == 0)
 298                 return dev->epmaxpacketout[((pipe>>15) & 0xf)];
 299         else
 300                 return dev->epmaxpacketin[((pipe>>15) & 0xf)];
 301 }
 302
 303 /*
 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)
 311  *
 312  * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
 313  */
 314 static void noinline
 315 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
 316 {
 317         int b;
 318         struct usb_endpoint_descriptor *ep;
 319         u16 ep_wMaxPacketSize;
 320
 321         ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
 322
 323         b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 324         ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
 325
 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]);
 333         } else {
 334                 if ((ep->bEndpointAddress & 0x80) == 0) {
 335                         /* OUT Endpoint */
 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]);
 340                         }
 341                 } else {
 342                         /* IN Endpoint */
 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]);
 347                         }
 348                 } /* if out */
 349         } /* if control */
 350 }
 351
 352 /*
 353  * set the max packed value of all endpoints in the given configuration
 354  */
 355 static int usb_set_maxpacket(struct usb_device *dev)
 356 {
 357         int i, ii;
 358
 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);
 362
 363         return 0;
 364 }
 365
 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.)
 370  */
 371 static int usb_parse_config(struct usb_device *dev,
 372                         unsigned char *buffer, int cfgno)
 373 {
 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;
 378
 379         ifno = -1;
 380         epno = -1;
 381         curr_if_num = -1;
 382
 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);
 388                 return -EINVAL;
 389         }
 390         if (head->bLength != USB_DT_CONFIG_SIZE) {
 391                 printf("ERROR: Invalid USB CFG length (%d)\n", head->bLength);
 392                 return -EINVAL;
 393         }
 394         memcpy(&dev->config, head, USB_DT_CONFIG_SIZE);
 395         dev->config.no_of_if = 0;
 396
 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",
 406                                         head->bLength);
 407                                 break;
 408                         }
 409                         if (index + USB_DT_INTERFACE_SIZE >
 410                             dev->config.desc.wTotalLength) {
 411                                 puts("USB IF descriptor overflowed buffer!\n");
 412                                 break;
 413                         }
 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 */
 421                                         return -EINVAL;
 422                                 }
 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;
 429                                 curr_if_num =
 430                                      if_desc->desc.bInterfaceNumber;
 431                         } else {
 432                                 /* found alternate setting for the interface */
 433                                 if (ifno >= 0) {
 434                                         if_desc = &dev->config.if_desc[ifno];
 435                                         if_desc->num_altsetting++;
 436                                 }
 437                         }
 438                         break;
 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",
 443                                         head->bLength);
 444                                 break;
 445                         }
 446                         if (index + head->bLength >
 447                             dev->config.desc.wTotalLength) {
 448                                 puts("USB EP descriptor overflowed buffer!\n");
 449                                 break;
 450                         }
 451                         if (ifno < 0) {
 452                                 puts("Endpoint descriptor out of order!\n");
 453                                 break;
 454                         }
 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);
 460                                 return -EINVAL;
 461                         }
 462                         /* found an endpoint */
 463                         if_desc->no_of_ep++;
 464                         memcpy(&if_desc->ep_desc[epno], head,
 465                                 USB_DT_ENDPOINT_SIZE);
 466                         ep_wMaxPacketSize = get_unaligned(&dev->config.\
 467                                                         if_desc[ifno].\
 468                                                         ep_desc[epno].\
 469                                                         wMaxPacketSize);
 470                         put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
 471                                         &dev->config.\
 472                                         if_desc[ifno].\
 473                                         ep_desc[epno].\
 474                                         wMaxPacketSize);
 475                         debug("if %d, ep %d\n", ifno, epno);
 476                         break;
 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",
 480                                         head->bLength);
 481                                 break;
 482                         }
 483                         if (index + USB_DT_SS_EP_COMP_SIZE >
 484                             dev->config.desc.wTotalLength) {
 485                                 puts("USB EPC descriptor overflowed buffer!\n");
 486                                 break;
 487                         }
 488                         if (ifno < 0 || epno < 0) {
 489                                 puts("EPC descriptor out of order!\n");
 490                                 break;
 491                         }
 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);
 495                         break;
 496                 default:
 497                         if (head->bLength == 0)
 498                                 return -EINVAL;
 499
 500                         debug("unknown Description Type : %x\n",
 501                               head->bDescriptorType);
 502
 503 #ifdef DEBUG
 504                         {
 505                                 unsigned char *ch = (unsigned char *)head;
 506                                 int i;
 507
 508                                 for (i = 0; i < head->bLength; i++)
 509                                         debug("%02X ", *ch++);
 510                                 debug("\n\n\n");
 511                         }
 512 #endif
 513                         break;
 514                 }
 515                 index += head->bLength;
 516                 head = (struct usb_descriptor_header *)&buffer[index];
 517         }
 518         return 0;
 519 }
 520
 521 /***********************************************************************
 522  * Clears an endpoint
 523  * endp: endpoint number in bits 0-3;
 524  * direction flag in bit 7 (1 = IN, 0 = OUT)
 525  */
 526 int usb_clear_halt(struct usb_device *dev, int pipe)
 527 {
 528         int result;
 529         int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
 530
 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);
 534
 535         /* don't clear if failed */
 536         if (result < 0)
 537                 return result;
 538
 539         /*
 540          * NOTE: we do not get status and verify reset was successful
 541          * as some devices are reported to lock up upon this check..
 542          */
 543
 544         usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
 545
 546         /* toggle is reset on clear */
 547         usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
 548         return 0;
 549 }
 550
 551
 552 /**********************************************************************
 553  * get_descriptor type
 554  */
 555 static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
 556                         unsigned char index, void *buf, int size)
 557 {
 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,
 561                                USB_CNTL_TIMEOUT);
 562 }
 563
 564 /**********************************************************************
 565  * gets len of configuration cfgno
 566  */
 567 int usb_get_configuration_len(struct usb_device *dev, int cfgno)
 568 {
 569         int result;
 570         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, 9);
 571         struct usb_config_descriptor *config;
 572
 573         config = (struct usb_config_descriptor *)&buffer[0];
 574         result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
 575         if (result < 9) {
 576                 if (result < 0)
 577                         printf("unable to get descriptor, error %lX\n",
 578                                 dev->status);
 579                 else
 580                         printf("config descriptor too short " \
 581                                 "(expected %i, got %i)\n", 9, result);
 582                 return -EIO;
 583         }
 584         return le16_to_cpu(config->wTotalLength);
 585 }
 586
 587 /**********************************************************************
 588  * gets configuration cfgno and store it in the buffer
 589  */
 590 int usb_get_configuration_no(struct usb_device *dev, int cfgno,
 591                              unsigned char *buffer, int length)
 592 {
 593         int result;
 594         struct usb_config_descriptor *config;
 595
 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 */
 601
 602         return result;
 603 }
 604
 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)
 608  */
 609 static int usb_set_address(struct usb_device *dev)
 610 {
 611         debug("set address %d\n", dev->devnum);
 612
 613         return usb_control_msg(dev, usb_snddefctrl(dev), USB_REQ_SET_ADDRESS,
 614                                0, (dev->devnum), 0, NULL, 0, USB_CNTL_TIMEOUT);
 615 }
 616
 617 /********************************************************************
 618  * set interface number to interface
 619  */
 620 int usb_set_interface(struct usb_device *dev, int interface, int alternate)
 621 {
 622         struct usb_interface *if_face = NULL;
 623         int ret, i;
 624
 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];
 628                         break;
 629                 }
 630         }
 631         if (!if_face) {
 632                 printf("selecting invalid interface %d", interface);
 633                 return -EINVAL;
 634         }
 635         /*
 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.
 641          */
 642         if (if_face->num_altsetting == 1)
 643                 return 0;
 644
 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);
 649         if (ret < 0)
 650                 return ret;
 651
 652         return 0;
 653 }
 654
 655 /********************************************************************
 656  * set configuration number to configuration
 657  */
 658 static int usb_set_configuration(struct usb_device *dev, int configuration)
 659 {
 660         int res;
 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,
 665                                 configuration, 0,
 666                                 NULL, 0, USB_CNTL_TIMEOUT);
 667         if (res == 0) {
 668                 dev->toggle[0] = 0;
 669                 dev->toggle[1] = 0;
 670                 return 0;
 671         } else
 672                 return -EIO;
 673 }
 674
 675 /********************************************************************
 676  * set protocol to protocol
 677  */
 678 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
 679 {
 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);
 683 }
 684
 685 /********************************************************************
 686  * set idle
 687  */
 688 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
 689 {
 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);
 693 }
 694
 695 /********************************************************************
 696  * get report
 697  */
 698 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
 699                    unsigned char id, void *buf, int size)
 700 {
 701         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 702                         USB_REQ_GET_REPORT,
 703                         USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 704                         (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
 705 }
 706
 707 /********************************************************************
 708  * get class descriptor
 709  */
 710 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
 711                 unsigned char type, unsigned char id, void *buf, int size)
 712 {
 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);
 716 }
 717
 718 /********************************************************************
 719  * get string index in buffer
 720  */
 721 static int usb_get_string(struct usb_device *dev, unsigned short langid,
 722                    unsigned char index, void *buf, int size)
 723 {
 724         int i;
 725         int result;
 726
 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,
 732                         USB_CNTL_TIMEOUT);
 733
 734                 if (result > 0)
 735                         break;
 736         }
 737
 738         return result;
 739 }
 740
 741
 742 static void usb_try_string_workarounds(unsigned char *buf, int *length)
 743 {
 744         int newlength, oldlength = *length;
 745
 746         for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
 747                 if (!isprint(buf[newlength]) || buf[newlength + 1])
 748                         break;
 749
 750         if (newlength > 2) {
 751                 buf[0] = newlength;
 752                 *length = newlength;
 753         }
 754 }
 755
 756
 757 static int usb_string_sub(struct usb_device *dev, unsigned int langid,
 758                 unsigned int index, unsigned char *buf)
 759 {
 760         int rc;
 761
 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);
 765
 766         /* If that failed try to read the descriptor length, then
 767          * ask for just that many bytes */
 768         if (rc < 2) {
 769                 rc = usb_get_string(dev, langid, index, buf, 2);
 770                 if (rc == 2)
 771                         rc = usb_get_string(dev, langid, index, buf, buf[0]);
 772         }
 773
 774         if (rc >= 2) {
 775                 if (!buf[0] && !buf[1])
 776                         usb_try_string_workarounds(buf, &rc);
 777
 778                 /* There might be extra junk at the end of the descriptor */
 779                 if (buf[0] < rc)
 780                         rc = buf[0];
 781
 782                 rc = rc - (rc & 1); /* force a multiple of two */
 783         }
 784
 785         if (rc < 2)
 786                 rc = -EINVAL;
 787
 788         return rc;
 789 }
 790
 791
 792 /********************************************************************
 793  * usb_string:
 794  * Get string index and translate it to ascii.
 795  * returns string length (> 0) or error (< 0)
 796  */
 797 int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
 798 {
 799         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ);
 800         unsigned char *tbuf;
 801         int err;
 802         unsigned int u, idx;
 803
 804         if (size <= 0 || !buf || !index)
 805                 return -EINVAL;
 806         buf[0] = 0;
 807         tbuf = &mybuf[0];
 808
 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);
 812                 if (err < 0) {
 813                         debug("error getting string descriptor 0 " \
 814                               "(error=%lx)\n", dev->status);
 815                         return -EIO;
 816                 } else if (tbuf[0] < 4) {
 817                         debug("string descriptor 0 too short\n");
 818                         return -EIO;
 819                 } else {
 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);
 826                 }
 827         }
 828
 829         err = usb_string_sub(dev, dev->string_langid, index, tbuf);
 830         if (err < 0)
 831                 return err;
 832
 833         size--;         /* leave room for trailing NULL char in output buffer */
 834         for (idx = 0, u = 2; u < err; u += 2) {
 835                 if (idx >= size)
 836                         break;
 837                 if (tbuf[u+1])                  /* high byte */
 838                         buf[idx++] = '?';  /* non-ASCII character */
 839                 else
 840                         buf[idx++] = tbuf[u];
 841         }
 842         buf[idx] = 0;
 843         err = idx;
 844         return err;
 845 }
 846
 847
 848 /********************************************************************
 849  * USB device handling:
 850  * the USB device are static allocated [USB_MAX_DEVICE].
 851  */
 852
 853 #ifndef CONFIG_DM_USB
 854
 855 /* returns a pointer to the device with the index [index].
 856  * if the device is not assigned (dev->devnum==-1) returns NULL
 857  */
 858 struct usb_device *usb_get_dev_index(int index)
 859 {
 860         if (usb_dev[index].devnum == -1)
 861                 return NULL;
 862         else
 863                 return &usb_dev[index];
 864 }
 865
 866 int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp)
 867 {
 868         int i;
 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);
 872                 return -ENOSPC;
 873         }
 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;
 881         dev_index++;
 882         *devp = &usb_dev[dev_index - 1];
 883
 884         return 0;
 885 }
 886
 887 /*
 888  * Free the newly created device node.
 889  * Called in error cases where configuring a newly attached
 890  * device fails for some reason.
 891  */
 892 void usb_free_device(struct udevice *controller)
 893 {
 894         dev_index--;
 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;
 898 }
 899
 900 /*
 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.
 905  */
 906 __weak int usb_alloc_device(struct usb_device *udev)
 907 {
 908         return 0;
 909 }
 910 #endif /* !CONFIG_DM_USB */
 911
 912 static int usb_hub_port_reset(struct usb_device *dev, struct usb_device *hub)
 913 {
 914         if (!hub)
 915                 usb_reset_root_port(dev);
 916
 917         return 0;
 918 }
 919
 920 static int get_descriptor_len(struct usb_device *dev, int len, int expect_len)
 921 {
 922         __maybe_unused struct usb_device_descriptor *desc;
 923         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
 924         int err;
 925
 926         desc = (struct usb_device_descriptor *)tmpbuf;
 927
 928         err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, len);
 929         if (err < expect_len) {
 930                 if (err < 0) {
 931                         printf("unable to get device descriptor (error=%d)\n",
 932                                 err);
 933                         return err;
 934                 } else {
 935                         printf("USB device descriptor short read (expected %i, got %i)\n",
 936                                 expect_len, err);
 937                         return -EIO;
 938                 }
 939         }
 940         memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor));
 941
 942         return 0;
 943 }
 944
 945 static int usb_setup_descriptor(struct usb_device *dev, bool do_read)
 946 {
 947         /*
 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
 954          */
 955
 956         /*
 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.
 961          */
 962
 963         if (dev->speed == USB_SPEED_LOW) {
 964                 dev->descriptor.bMaxPacketSize0 = 8;
 965                 dev->maxpacketsize = PACKET_SIZE_8;
 966         } else {
 967                 dev->descriptor.bMaxPacketSize0 = 64;
 968                 dev->maxpacketsize = PACKET_SIZE_64;
 969         }
 970         dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
 971         dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
 972
 973         if (do_read && dev->speed == USB_SPEED_FULL) {
 974                 int err;
 975
 976                 /*
 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
 985                  *   a non-error case.
 986                  *
 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.
 991                  */
 992                 err = get_descriptor_len(dev, 64, 8);
 993                 if (err)
 994                         return err;
 995         }
 996
 997         dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
 998         dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
 999         switch (dev->descriptor.bMaxPacketSize0) {
1000         case 8:
1001                 dev->maxpacketsize  = PACKET_SIZE_8;
1002                 break;
1003         case 16:
1004                 dev->maxpacketsize = PACKET_SIZE_16;
1005                 break;
1006         case 32:
1007                 dev->maxpacketsize = PACKET_SIZE_32;
1008                 break;
1009         case 64:
1010                 dev->maxpacketsize = PACKET_SIZE_64;
1011                 break;
1012         default:
1013                 printf("%s: invalid max packet size\n", __func__);
1014                 return -EIO;
1015         }
1016
1017         return 0;
1018 }
1019
1020 static int usb_prepare_device(struct usb_device *dev, int addr, bool do_read,
1021                               struct usb_device *parent)
1022 {
1023         int err;
1024
1025         /*
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
1030          */
1031         err = usb_alloc_device(dev);
1032         if (err) {
1033                 printf("Cannot allocate device context to get SLOT_ID\n");
1034                 return err;
1035         }
1036         err = usb_setup_descriptor(dev, do_read);
1037         if (err)
1038                 return err;
1039         err = usb_hub_port_reset(dev, parent);
1040         if (err)
1041                 return err;
1042
1043         dev->devnum = addr;
1044
1045         err = usb_set_address(dev); /* set address */
1046
1047         if (err < 0) {
1048                 printf("\n      USB device not accepting new address " \
1049                         "(error=%lX)\n", dev->status);
1050                 return err;
1051         }
1052
1053         mdelay(10);     /* Let the SET_ADDRESS settle */
1054
1055         /*
1056          * If we haven't read device descriptor before, read it here
1057          * after device is assigned an address. This is only applicable
1058          * to xHCI so far.
1059          */
1060         if (!do_read) {
1061                 err = usb_setup_descriptor(dev, true);
1062                 if (err)
1063                         return err;
1064         }
1065
1066         return 0;
1067 }
1068
1069 int usb_select_config(struct usb_device *dev)
1070 {
1071         unsigned char *tmpbuf = NULL;
1072         int err;
1073
1074         err = get_descriptor_len(dev, USB_DT_DEVICE_SIZE, USB_DT_DEVICE_SIZE);
1075         if (err)
1076                 return err;
1077
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);
1083
1084         /*
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).
1089          */
1090         mdelay(1);
1091
1092         /* only support for one config for now */
1093         err = usb_get_configuration_len(dev, 0);
1094         if (err >= 0) {
1095                 tmpbuf = (unsigned char *)malloc_cache_aligned(err);
1096                 if (!tmpbuf)
1097                         err = -ENOMEM;
1098                 else
1099                         err = usb_get_configuration_no(dev, 0, tmpbuf, err);
1100         }
1101         if (err < 0) {
1102                 printf("usb_new_device: Cannot read configuration, " \
1103                        "skipping device %04x:%04x\n",
1104                        dev->descriptor.idVendor, dev->descriptor.idProduct);
1105                 free(tmpbuf);
1106                 return err;
1107         }
1108         usb_parse_config(dev, tmpbuf, 0);
1109         free(tmpbuf);
1110         usb_set_maxpacket(dev);
1111         /*
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.
1115          */
1116         err = usb_set_configuration(dev, dev->config.desc.bConfigurationValue);
1117         if (err < 0) {
1118                 printf("failed to set default configuration " \
1119                         "len %d, status %lX\n", dev->act_len, dev->status);
1120                 return err;
1121         }
1122
1123         /*
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.
1127          */
1128         mdelay(10);
1129
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);
1148
1149         return 0;
1150 }
1151
1152 int usb_setup_device(struct usb_device *dev, bool do_read,
1153                      struct usb_device *parent)
1154 {
1155         int addr;
1156         int ret;
1157
1158         /* We still haven't set the Address yet */
1159         addr = dev->devnum;
1160         dev->devnum = 0;
1161
1162         ret = usb_prepare_device(dev, addr, do_read, parent);
1163         if (ret)
1164                 return ret;
1165         ret = usb_select_config(dev);
1166
1167         return ret;
1168 }
1169
1170 #ifndef CONFIG_DM_USB
1171 /*
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..
1175  *
1176  * Returns 0 for success, != 0 for error.
1177  */
1178 int usb_new_device(struct usb_device *dev)
1179 {
1180         bool do_read = true;
1181         int err;
1182
1183         /*
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.
1188          */
1189 #ifdef CONFIG_USB_XHCI_HCD
1190         do_read = false;
1191 #endif
1192         err = usb_setup_device(dev, do_read, dev->parent);
1193         if (err)
1194                 return err;
1195
1196         /* Now probe if the device is a hub */
1197         err = usb_hub_probe(dev, 0);
1198         if (err < 0)
1199                 return err;
1200
1201         return 0;
1202 }
1203 #endif
1204
1205 __weak
1206 int board_usb_init(int index, enum usb_init_type init)
1207 {
1208         return 0;
1209 }
1210
1211 __weak
1212 int board_usb_cleanup(int index, enum usb_init_type init)
1213 {
1214         return 0;
1215 }
1216
1217 bool usb_device_has_child_on_port(struct usb_device *parent, int port)
1218 {
1219 #ifdef CONFIG_DM_USB
1220         return false;
1221 #else
1222         return parent->children[port] != NULL;
1223 #endif
1224 }
1225
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)
1229 {
1230         struct udevice *parent;
1231         struct usb_device *uparent, *ttdev;
1232
1233         /*
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 .
1239          */
1240         ttdev = udev;
1241         parent = udev->dev;
1242         uparent = dev_get_parent_priv(parent);
1243
1244         while (uparent->speed != USB_SPEED_HIGH) {
1245                 struct udevice *dev = parent;
1246
1247                 if (device_get_uclass_id(dev->parent) != UCLASS_USB_HUB) {
1248                         printf("Error: Cannot find high speed parent of usb-1 device\n");
1249                         *hub_address = 0;
1250                         *hub_port = 0;
1251                         return;
1252                 }
1253
1254                 ttdev = dev_get_parent_priv(dev);
1255                 parent = dev->parent;
1256                 uparent = dev_get_parent_priv(parent);
1257         }
1258         *hub_address = uparent->devnum;
1259         *hub_port = ttdev->portnr;
1260 }
1261 #else
1262 void usb_find_usb2_hub_address_port(struct usb_device *udev,
1263                                uint8_t *hub_address, uint8_t *hub_port)
1264 {
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;
1269                 } else {
1270                         *hub_address = udev->parent->devnum;
1271                         *hub_port = udev->portnr;
1272                         return;
1273                 }
1274
1275         printf("Error: Cannot find high speed parent of usb-1 device\n");
1276         *hub_address = 0;
1277         *hub_port = 0;
1278 }
1279 #endif
1280
1281
1282 /* EOF */