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 <asm/processor.h> 32 #include <linux/compiler.h> 33 #include <linux/ctype.h> 34 #include <asm/byteorder.h> 35 #include <asm/unaligned.h> 36 37 #include <usb.h> 38 #ifdef CONFIG_4xx 39 #include <asm/4xx_pci.h> 40 #endif 41 42 #define USB_BUFSIZ 512 43 44 static struct usb_device usb_dev[USB_MAX_DEVICE]; 45 static int dev_index; 46 static int asynch_allowed; 47 48 char usb_started; /* flag for the started/stopped USB status */ 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 63 dev_index = 0; 64 asynch_allowed = 1; 65 usb_hub_reset(); 66 67 /* first make all devices unknown */ 68 for (i = 0; i < USB_MAX_DEVICE; i++) { 69 memset(&usb_dev[i], 0, sizeof(struct usb_device)); 70 usb_dev[i].devnum = -1; 71 } 72 73 /* init low_level USB */ 74 for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) { 75 /* init low_level USB */ 76 printf("USB%d: ", i); 77 if (usb_lowlevel_init(i, &ctrl)) { 78 puts("lowlevel init failed\n"); 79 continue; 80 } 81 /* 82 * lowlevel init is OK, now scan the bus for devices 83 * i.e. search HUBs and configure them 84 */ 85 start_index = dev_index; 86 printf("scanning bus %d for devices... ", i); 87 dev = usb_alloc_new_device(ctrl); 88 /* 89 * device 0 is always present 90 * (root hub, so let it analyze) 91 */ 92 if (dev) 93 usb_new_device(dev); 94 95 if (start_index == dev_index) 96 puts("No USB Device found\n"); 97 else 98 printf("%d USB Device(s) found\n", 99 dev_index - start_index); 100 101 usb_started = 1; 102 } 103 104 debug("scan end\n"); 105 /* if we were not able to find at least one working bus, bail out */ 106 if (!usb_started) { 107 puts("USB error: all controllers failed lowlevel init\n"); 108 return -1; 109 } 110 111 return 0; 112 } 113 114 /****************************************************************************** 115 * Stop USB this stops the LowLevel Part and deregisters USB devices. 116 */ 117 int usb_stop(void) 118 { 119 int i; 120 121 if (usb_started) { 122 asynch_allowed = 1; 123 usb_started = 0; 124 usb_hub_reset(); 125 126 for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) { 127 if (usb_lowlevel_stop(i)) 128 printf("failed to stop USB controller %d\n", i); 129 } 130 } 131 132 return 0; 133 } 134 135 /* 136 * disables the asynch behaviour of the control message. This is used for data 137 * transfers that uses the exclusiv access to the control and bulk messages. 138 * Returns the old value so it can be restored later. 139 */ 140 int usb_disable_asynch(int disable) 141 { 142 int old_value = asynch_allowed; 143 144 asynch_allowed = !disable; 145 return old_value; 146 } 147 148 149 /*------------------------------------------------------------------- 150 * Message wrappers. 151 * 152 */ 153 154 /* 155 * submits an Interrupt Message 156 */ 157 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe, 158 void *buffer, int transfer_len, int interval) 159 { 160 return submit_int_msg(dev, pipe, buffer, transfer_len, interval); 161 } 162 163 /* 164 * submits a control message and waits for comletion (at least timeout * 1ms) 165 * If timeout is 0, we don't wait for completion (used as example to set and 166 * clear keyboards LEDs). For data transfers, (storage transfers) we don't 167 * allow control messages with 0 timeout, by previousely resetting the flag 168 * asynch_allowed (usb_disable_asynch(1)). 169 * returns the transfered length if OK or -1 if error. The transfered length 170 * and the current status are stored in the dev->act_len and dev->status. 171 */ 172 int usb_control_msg(struct usb_device *dev, unsigned int pipe, 173 unsigned char request, unsigned char requesttype, 174 unsigned short value, unsigned short index, 175 void *data, unsigned short size, int timeout) 176 { 177 ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1); 178 179 if ((timeout == 0) && (!asynch_allowed)) { 180 /* request for a asynch control pipe is not allowed */ 181 return -1; 182 } 183 184 /* set setup command */ 185 setup_packet->requesttype = requesttype; 186 setup_packet->request = request; 187 setup_packet->value = cpu_to_le16(value); 188 setup_packet->index = cpu_to_le16(index); 189 setup_packet->length = cpu_to_le16(size); 190 debug("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \ 191 "value 0x%X index 0x%X length 0x%X\n", 192 request, requesttype, value, index, size); 193 dev->status = USB_ST_NOT_PROC; /*not yet processed */ 194 195 if (submit_control_msg(dev, pipe, data, size, setup_packet) < 0) 196 return -1; 197 if (timeout == 0) 198 return (int)size; 199 200 /* 201 * Wait for status to update until timeout expires, USB driver 202 * interrupt handler may set the status when the USB operation has 203 * been completed. 204 */ 205 while (timeout--) { 206 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC)) 207 break; 208 mdelay(1); 209 } 210 if (dev->status) 211 return -1; 212 213 return dev->act_len; 214 215 } 216 217 /*------------------------------------------------------------------- 218 * submits bulk message, and waits for completion. returns 0 if Ok or 219 * -1 if Error. 220 * synchronous behavior 221 */ 222 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe, 223 void *data, int len, int *actual_length, int timeout) 224 { 225 if (len < 0) 226 return -1; 227 dev->status = USB_ST_NOT_PROC; /*not yet processed */ 228 if (submit_bulk_msg(dev, pipe, data, len) < 0) 229 return -1; 230 while (timeout--) { 231 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC)) 232 break; 233 mdelay(1); 234 } 235 *actual_length = dev->act_len; 236 if (dev->status == 0) 237 return 0; 238 else 239 return -1; 240 } 241 242 243 /*------------------------------------------------------------------- 244 * Max Packet stuff 245 */ 246 247 /* 248 * returns the max packet size, depending on the pipe direction and 249 * the configurations values 250 */ 251 int usb_maxpacket(struct usb_device *dev, unsigned long pipe) 252 { 253 /* direction is out -> use emaxpacket out */ 254 if ((pipe & USB_DIR_IN) == 0) 255 return dev->epmaxpacketout[((pipe>>15) & 0xf)]; 256 else 257 return dev->epmaxpacketin[((pipe>>15) & 0xf)]; 258 } 259 260 /* 261 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine 262 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine 263 * when it is inlined in 1 single routine. What happens is that the register r3 264 * is used as loop-count 'i', but gets overwritten later on. 265 * This is clearly a compiler bug, but it is easier to workaround it here than 266 * to update the compiler (Occurs with at least several GCC 4.{1,2},x 267 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM) 268 * 269 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5. 270 */ 271 static void noinline 272 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx) 273 { 274 int b; 275 struct usb_endpoint_descriptor *ep; 276 u16 ep_wMaxPacketSize; 277 278 ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx]; 279 280 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; 281 ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize); 282 283 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == 284 USB_ENDPOINT_XFER_CONTROL) { 285 /* Control => bidirectional */ 286 dev->epmaxpacketout[b] = ep_wMaxPacketSize; 287 dev->epmaxpacketin[b] = ep_wMaxPacketSize; 288 debug("##Control EP epmaxpacketout/in[%d] = %d\n", 289 b, dev->epmaxpacketin[b]); 290 } else { 291 if ((ep->bEndpointAddress & 0x80) == 0) { 292 /* OUT Endpoint */ 293 if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) { 294 dev->epmaxpacketout[b] = ep_wMaxPacketSize; 295 debug("##EP epmaxpacketout[%d] = %d\n", 296 b, dev->epmaxpacketout[b]); 297 } 298 } else { 299 /* IN Endpoint */ 300 if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) { 301 dev->epmaxpacketin[b] = ep_wMaxPacketSize; 302 debug("##EP epmaxpacketin[%d] = %d\n", 303 b, dev->epmaxpacketin[b]); 304 } 305 } /* if out */ 306 } /* if control */ 307 } 308 309 /* 310 * set the max packed value of all endpoints in the given configuration 311 */ 312 static int usb_set_maxpacket(struct usb_device *dev) 313 { 314 int i, ii; 315 316 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) 317 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++) 318 usb_set_maxpacket_ep(dev, i, ii); 319 320 return 0; 321 } 322 323 /******************************************************************************* 324 * Parse the config, located in buffer, and fills the dev->config structure. 325 * Note that all little/big endian swapping are done automatically. 326 */ 327 static int usb_parse_config(struct usb_device *dev, 328 unsigned char *buffer, int cfgno) 329 { 330 struct usb_descriptor_header *head; 331 int index, ifno, epno, curr_if_num; 332 u16 ep_wMaxPacketSize; 333 struct usb_interface *if_desc = NULL; 334 335 ifno = -1; 336 epno = -1; 337 curr_if_num = -1; 338 339 dev->configno = cfgno; 340 head = (struct usb_descriptor_header *) &buffer[0]; 341 if (head->bDescriptorType != USB_DT_CONFIG) { 342 printf(" ERROR: NOT USB_CONFIG_DESC %x\n", 343 head->bDescriptorType); 344 return -1; 345 } 346 memcpy(&dev->config, buffer, buffer[0]); 347 le16_to_cpus(&(dev->config.desc.wTotalLength)); 348 dev->config.no_of_if = 0; 349 350 index = dev->config.desc.bLength; 351 /* Ok the first entry must be a configuration entry, 352 * now process the others */ 353 head = (struct usb_descriptor_header *) &buffer[index]; 354 while (index + 1 < dev->config.desc.wTotalLength) { 355 switch (head->bDescriptorType) { 356 case USB_DT_INTERFACE: 357 if (((struct usb_interface_descriptor *) \ 358 &buffer[index])->bInterfaceNumber != curr_if_num) { 359 /* this is a new interface, copy new desc */ 360 ifno = dev->config.no_of_if; 361 if_desc = &dev->config.if_desc[ifno]; 362 dev->config.no_of_if++; 363 memcpy(if_desc, &buffer[index], buffer[index]); 364 if_desc->no_of_ep = 0; 365 if_desc->num_altsetting = 1; 366 curr_if_num = 367 if_desc->desc.bInterfaceNumber; 368 } else { 369 /* found alternate setting for the interface */ 370 if (ifno >= 0) { 371 if_desc = &dev->config.if_desc[ifno]; 372 if_desc->num_altsetting++; 373 } 374 } 375 break; 376 case USB_DT_ENDPOINT: 377 epno = dev->config.if_desc[ifno].no_of_ep; 378 if_desc = &dev->config.if_desc[ifno]; 379 /* found an endpoint */ 380 if_desc->no_of_ep++; 381 memcpy(&if_desc->ep_desc[epno], 382 &buffer[index], buffer[index]); 383 ep_wMaxPacketSize = get_unaligned(&dev->config.\ 384 if_desc[ifno].\ 385 ep_desc[epno].\ 386 wMaxPacketSize); 387 put_unaligned(le16_to_cpu(ep_wMaxPacketSize), 388 &dev->config.\ 389 if_desc[ifno].\ 390 ep_desc[epno].\ 391 wMaxPacketSize); 392 debug("if %d, ep %d\n", ifno, epno); 393 break; 394 case USB_DT_SS_ENDPOINT_COMP: 395 if_desc = &dev->config.if_desc[ifno]; 396 memcpy(&if_desc->ss_ep_comp_desc[epno], 397 &buffer[index], buffer[index]); 398 break; 399 default: 400 if (head->bLength == 0) 401 return 1; 402 403 debug("unknown Description Type : %x\n", 404 head->bDescriptorType); 405 406 #ifdef DEBUG 407 { 408 unsigned char *ch = (unsigned char *)head; 409 int i; 410 411 for (i = 0; i < head->bLength; i++) 412 debug("%02X ", *ch++); 413 debug("\n\n\n"); 414 } 415 #endif 416 break; 417 } 418 index += head->bLength; 419 head = (struct usb_descriptor_header *)&buffer[index]; 420 } 421 return 1; 422 } 423 424 /*********************************************************************** 425 * Clears an endpoint 426 * endp: endpoint number in bits 0-3; 427 * direction flag in bit 7 (1 = IN, 0 = OUT) 428 */ 429 int usb_clear_halt(struct usb_device *dev, int pipe) 430 { 431 int result; 432 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7); 433 434 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 435 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0, 436 endp, NULL, 0, USB_CNTL_TIMEOUT * 3); 437 438 /* don't clear if failed */ 439 if (result < 0) 440 return result; 441 442 /* 443 * NOTE: we do not get status and verify reset was successful 444 * as some devices are reported to lock up upon this check.. 445 */ 446 447 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe)); 448 449 /* toggle is reset on clear */ 450 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0); 451 return 0; 452 } 453 454 455 /********************************************************************** 456 * get_descriptor type 457 */ 458 static int usb_get_descriptor(struct usb_device *dev, unsigned char type, 459 unsigned char index, void *buf, int size) 460 { 461 int res; 462 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 463 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN, 464 (type << 8) + index, 0, 465 buf, size, USB_CNTL_TIMEOUT); 466 return res; 467 } 468 469 /********************************************************************** 470 * gets configuration cfgno and store it in the buffer 471 */ 472 int usb_get_configuration_no(struct usb_device *dev, 473 unsigned char *buffer, int cfgno) 474 { 475 int result; 476 unsigned int tmp; 477 struct usb_config_descriptor *config; 478 479 config = (struct usb_config_descriptor *)&buffer[0]; 480 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9); 481 if (result < 9) { 482 if (result < 0) 483 printf("unable to get descriptor, error %lX\n", 484 dev->status); 485 else 486 printf("config descriptor too short " \ 487 "(expected %i, got %i)\n", 9, result); 488 return -1; 489 } 490 tmp = le16_to_cpu(config->wTotalLength); 491 492 if (tmp > USB_BUFSIZ) { 493 printf("usb_get_configuration_no: failed to get " \ 494 "descriptor - too long: %d\n", tmp); 495 return -1; 496 } 497 498 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp); 499 debug("get_conf_no %d Result %d, wLength %d\n", cfgno, result, tmp); 500 return result; 501 } 502 503 /******************************************************************** 504 * set address of a device to the value in dev->devnum. 505 * This can only be done by addressing the device via the default address (0) 506 */ 507 static int usb_set_address(struct usb_device *dev) 508 { 509 int res; 510 511 debug("set address %d\n", dev->devnum); 512 res = usb_control_msg(dev, usb_snddefctrl(dev), 513 USB_REQ_SET_ADDRESS, 0, 514 (dev->devnum), 0, 515 NULL, 0, USB_CNTL_TIMEOUT); 516 return res; 517 } 518 519 /******************************************************************** 520 * set interface number to interface 521 */ 522 int usb_set_interface(struct usb_device *dev, int interface, int alternate) 523 { 524 struct usb_interface *if_face = NULL; 525 int ret, i; 526 527 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) { 528 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) { 529 if_face = &dev->config.if_desc[i]; 530 break; 531 } 532 } 533 if (!if_face) { 534 printf("selecting invalid interface %d", interface); 535 return -1; 536 } 537 /* 538 * We should return now for devices with only one alternate setting. 539 * According to 9.4.10 of the Universal Serial Bus Specification 540 * Revision 2.0 such devices can return with a STALL. This results in 541 * some USB sticks timeouting during initialization and then being 542 * unusable in U-Boot. 543 */ 544 if (if_face->num_altsetting == 1) 545 return 0; 546 547 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 548 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE, 549 alternate, interface, NULL, 0, 550 USB_CNTL_TIMEOUT * 5); 551 if (ret < 0) 552 return ret; 553 554 return 0; 555 } 556 557 /******************************************************************** 558 * set configuration number to configuration 559 */ 560 static int usb_set_configuration(struct usb_device *dev, int configuration) 561 { 562 int res; 563 debug("set configuration %d\n", configuration); 564 /* set setup command */ 565 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 566 USB_REQ_SET_CONFIGURATION, 0, 567 configuration, 0, 568 NULL, 0, USB_CNTL_TIMEOUT); 569 if (res == 0) { 570 dev->toggle[0] = 0; 571 dev->toggle[1] = 0; 572 return 0; 573 } else 574 return -1; 575 } 576 577 /******************************************************************** 578 * set protocol to protocol 579 */ 580 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol) 581 { 582 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 583 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE, 584 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT); 585 } 586 587 /******************************************************************** 588 * set idle 589 */ 590 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id) 591 { 592 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 593 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, 594 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT); 595 } 596 597 /******************************************************************** 598 * get report 599 */ 600 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type, 601 unsigned char id, void *buf, int size) 602 { 603 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 604 USB_REQ_GET_REPORT, 605 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, 606 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT); 607 } 608 609 /******************************************************************** 610 * get class descriptor 611 */ 612 int usb_get_class_descriptor(struct usb_device *dev, int ifnum, 613 unsigned char type, unsigned char id, void *buf, int size) 614 { 615 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 616 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN, 617 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT); 618 } 619 620 /******************************************************************** 621 * get string index in buffer 622 */ 623 static int usb_get_string(struct usb_device *dev, unsigned short langid, 624 unsigned char index, void *buf, int size) 625 { 626 int i; 627 int result; 628 629 for (i = 0; i < 3; ++i) { 630 /* some devices are flaky */ 631 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 632 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN, 633 (USB_DT_STRING << 8) + index, langid, buf, size, 634 USB_CNTL_TIMEOUT); 635 636 if (result > 0) 637 break; 638 } 639 640 return result; 641 } 642 643 644 static void usb_try_string_workarounds(unsigned char *buf, int *length) 645 { 646 int newlength, oldlength = *length; 647 648 for (newlength = 2; newlength + 1 < oldlength; newlength += 2) 649 if (!isprint(buf[newlength]) || buf[newlength + 1]) 650 break; 651 652 if (newlength > 2) { 653 buf[0] = newlength; 654 *length = newlength; 655 } 656 } 657 658 659 static int usb_string_sub(struct usb_device *dev, unsigned int langid, 660 unsigned int index, unsigned char *buf) 661 { 662 int rc; 663 664 /* Try to read the string descriptor by asking for the maximum 665 * possible number of bytes */ 666 rc = usb_get_string(dev, langid, index, buf, 255); 667 668 /* If that failed try to read the descriptor length, then 669 * ask for just that many bytes */ 670 if (rc < 2) { 671 rc = usb_get_string(dev, langid, index, buf, 2); 672 if (rc == 2) 673 rc = usb_get_string(dev, langid, index, buf, buf[0]); 674 } 675 676 if (rc >= 2) { 677 if (!buf[0] && !buf[1]) 678 usb_try_string_workarounds(buf, &rc); 679 680 /* There might be extra junk at the end of the descriptor */ 681 if (buf[0] < rc) 682 rc = buf[0]; 683 684 rc = rc - (rc & 1); /* force a multiple of two */ 685 } 686 687 if (rc < 2) 688 rc = -1; 689 690 return rc; 691 } 692 693 694 /******************************************************************** 695 * usb_string: 696 * Get string index and translate it to ascii. 697 * returns string length (> 0) or error (< 0) 698 */ 699 int usb_string(struct usb_device *dev, int index, char *buf, size_t size) 700 { 701 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ); 702 unsigned char *tbuf; 703 int err; 704 unsigned int u, idx; 705 706 if (size <= 0 || !buf || !index) 707 return -1; 708 buf[0] = 0; 709 tbuf = &mybuf[0]; 710 711 /* get langid for strings if it's not yet known */ 712 if (!dev->have_langid) { 713 err = usb_string_sub(dev, 0, 0, tbuf); 714 if (err < 0) { 715 debug("error getting string descriptor 0 " \ 716 "(error=%lx)\n", dev->status); 717 return -1; 718 } else if (tbuf[0] < 4) { 719 debug("string descriptor 0 too short\n"); 720 return -1; 721 } else { 722 dev->have_langid = -1; 723 dev->string_langid = tbuf[2] | (tbuf[3] << 8); 724 /* always use the first langid listed */ 725 debug("USB device number %d default " \ 726 "language ID 0x%x\n", 727 dev->devnum, dev->string_langid); 728 } 729 } 730 731 err = usb_string_sub(dev, dev->string_langid, index, tbuf); 732 if (err < 0) 733 return err; 734 735 size--; /* leave room for trailing NULL char in output buffer */ 736 for (idx = 0, u = 2; u < err; u += 2) { 737 if (idx >= size) 738 break; 739 if (tbuf[u+1]) /* high byte */ 740 buf[idx++] = '?'; /* non-ASCII character */ 741 else 742 buf[idx++] = tbuf[u]; 743 } 744 buf[idx] = 0; 745 err = idx; 746 return err; 747 } 748 749 750 /******************************************************************** 751 * USB device handling: 752 * the USB device are static allocated [USB_MAX_DEVICE]. 753 */ 754 755 756 /* returns a pointer to the device with the index [index]. 757 * if the device is not assigned (dev->devnum==-1) returns NULL 758 */ 759 struct usb_device *usb_get_dev_index(int index) 760 { 761 if (usb_dev[index].devnum == -1) 762 return NULL; 763 else 764 return &usb_dev[index]; 765 } 766 767 /* returns a pointer of a new device structure or NULL, if 768 * no device struct is available 769 */ 770 struct usb_device *usb_alloc_new_device(void *controller) 771 { 772 int i; 773 debug("New Device %d\n", dev_index); 774 if (dev_index == USB_MAX_DEVICE) { 775 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE); 776 return NULL; 777 } 778 /* default Address is 0, real addresses start with 1 */ 779 usb_dev[dev_index].devnum = dev_index + 1; 780 usb_dev[dev_index].maxchild = 0; 781 for (i = 0; i < USB_MAXCHILDREN; i++) 782 usb_dev[dev_index].children[i] = NULL; 783 usb_dev[dev_index].parent = NULL; 784 usb_dev[dev_index].controller = controller; 785 dev_index++; 786 return &usb_dev[dev_index - 1]; 787 } 788 789 /* 790 * Free the newly created device node. 791 * Called in error cases where configuring a newly attached 792 * device fails for some reason. 793 */ 794 void usb_free_device(void) 795 { 796 dev_index--; 797 debug("Freeing device node: %d\n", dev_index); 798 memset(&usb_dev[dev_index], 0, sizeof(struct usb_device)); 799 usb_dev[dev_index].devnum = -1; 800 } 801 802 /* 803 * By the time we get here, the device has gotten a new device ID 804 * and is in the default state. We need to identify the thing and 805 * get the ball rolling.. 806 * 807 * Returns 0 for success, != 0 for error. 808 */ 809 int usb_new_device(struct usb_device *dev) 810 { 811 int addr, err; 812 int tmp; 813 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ); 814 815 /* We still haven't set the Address yet */ 816 addr = dev->devnum; 817 dev->devnum = 0; 818 819 #ifdef CONFIG_LEGACY_USB_INIT_SEQ 820 /* this is the old and known way of initializing devices, it is 821 * different than what Windows and Linux are doing. Windows and Linux 822 * both retrieve 64 bytes while reading the device descriptor 823 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an 824 * invalid header while reading 8 bytes as device descriptor. */ 825 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */ 826 dev->maxpacketsize = PACKET_SIZE_8; 827 dev->epmaxpacketin[0] = 8; 828 dev->epmaxpacketout[0] = 8; 829 830 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, tmpbuf, 8); 831 if (err < 8) { 832 printf("\n USB device not responding, " \ 833 "giving up (status=%lX)\n", dev->status); 834 return 1; 835 } 836 memcpy(&dev->descriptor, tmpbuf, 8); 837 #else 838 /* This is a Windows scheme of initialization sequence, with double 839 * reset of the device (Linux uses the same sequence) 840 * Some equipment is said to work only with such init sequence; this 841 * patch is based on the work by Alan Stern: 842 * http://sourceforge.net/mailarchive/forum.php? 843 * thread_id=5729457&forum_id=5398 844 */ 845 struct usb_device_descriptor *desc; 846 int port = -1; 847 struct usb_device *parent = dev->parent; 848 unsigned short portstatus; 849 850 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is 851 * only 18 bytes long, this will terminate with a short packet. But if 852 * the maxpacket size is 8 or 16 the device may be waiting to transmit 853 * some more, or keeps on retransmitting the 8 byte header. */ 854 855 desc = (struct usb_device_descriptor *)tmpbuf; 856 dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */ 857 /* Default to 64 byte max packet size */ 858 dev->maxpacketsize = PACKET_SIZE_64; 859 dev->epmaxpacketin[0] = 64; 860 dev->epmaxpacketout[0] = 64; 861 862 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64); 863 if (err < 0) { 864 debug("usb_new_device: usb_get_descriptor() failed\n"); 865 return 1; 866 } 867 868 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0; 869 /* 870 * Fetch the device class, driver can use this info 871 * to differentiate between HUB and DEVICE. 872 */ 873 dev->descriptor.bDeviceClass = desc->bDeviceClass; 874 875 /* find the port number we're at */ 876 if (parent) { 877 int j; 878 879 for (j = 0; j < parent->maxchild; j++) { 880 if (parent->children[j] == dev) { 881 port = j; 882 break; 883 } 884 } 885 if (port < 0) { 886 printf("usb_new_device:cannot locate device's port.\n"); 887 return 1; 888 } 889 890 /* reset the port for the second time */ 891 err = hub_port_reset(dev->parent, port, &portstatus); 892 if (err < 0) { 893 printf("\n Couldn't reset port %i\n", port); 894 return 1; 895 } 896 } 897 #endif 898 899 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0; 900 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0; 901 switch (dev->descriptor.bMaxPacketSize0) { 902 case 8: 903 dev->maxpacketsize = PACKET_SIZE_8; 904 break; 905 case 16: 906 dev->maxpacketsize = PACKET_SIZE_16; 907 break; 908 case 32: 909 dev->maxpacketsize = PACKET_SIZE_32; 910 break; 911 case 64: 912 dev->maxpacketsize = PACKET_SIZE_64; 913 break; 914 } 915 dev->devnum = addr; 916 917 err = usb_set_address(dev); /* set address */ 918 919 if (err < 0) { 920 printf("\n USB device not accepting new address " \ 921 "(error=%lX)\n", dev->status); 922 return 1; 923 } 924 925 mdelay(10); /* Let the SET_ADDRESS settle */ 926 927 tmp = sizeof(dev->descriptor); 928 929 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, 930 tmpbuf, sizeof(dev->descriptor)); 931 if (err < tmp) { 932 if (err < 0) 933 printf("unable to get device descriptor (error=%d)\n", 934 err); 935 else 936 printf("USB device descriptor short read " \ 937 "(expected %i, got %i)\n", tmp, err); 938 return 1; 939 } 940 memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor)); 941 /* correct le values */ 942 le16_to_cpus(&dev->descriptor.bcdUSB); 943 le16_to_cpus(&dev->descriptor.idVendor); 944 le16_to_cpus(&dev->descriptor.idProduct); 945 le16_to_cpus(&dev->descriptor.bcdDevice); 946 /* only support for one config for now */ 947 err = usb_get_configuration_no(dev, tmpbuf, 0); 948 if (err < 0) { 949 printf("usb_new_device: Cannot read configuration, " \ 950 "skipping device %04x:%04x\n", 951 dev->descriptor.idVendor, dev->descriptor.idProduct); 952 return -1; 953 } 954 usb_parse_config(dev, tmpbuf, 0); 955 usb_set_maxpacket(dev); 956 /* we set the default configuration here */ 957 if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) { 958 printf("failed to set default configuration " \ 959 "len %d, status %lX\n", dev->act_len, dev->status); 960 return -1; 961 } 962 debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n", 963 dev->descriptor.iManufacturer, dev->descriptor.iProduct, 964 dev->descriptor.iSerialNumber); 965 memset(dev->mf, 0, sizeof(dev->mf)); 966 memset(dev->prod, 0, sizeof(dev->prod)); 967 memset(dev->serial, 0, sizeof(dev->serial)); 968 if (dev->descriptor.iManufacturer) 969 usb_string(dev, dev->descriptor.iManufacturer, 970 dev->mf, sizeof(dev->mf)); 971 if (dev->descriptor.iProduct) 972 usb_string(dev, dev->descriptor.iProduct, 973 dev->prod, sizeof(dev->prod)); 974 if (dev->descriptor.iSerialNumber) 975 usb_string(dev, dev->descriptor.iSerialNumber, 976 dev->serial, sizeof(dev->serial)); 977 debug("Manufacturer %s\n", dev->mf); 978 debug("Product %s\n", dev->prod); 979 debug("SerialNumber %s\n", dev->serial); 980 /* now prode if the device is a hub */ 981 usb_hub_probe(dev, 0); 982 return 0; 983 } 984 985 /* EOF */ 986