1 /* 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 * See file CREDITS for list of people who contributed to this 19 * project. 20 * 21 * This program is free software; you can redistribute it and/or 22 * modify it under the terms of the GNU General Public License as 23 * published by the Free Software Foundation; either version 2 of 24 * the License, or (at your option) any later version. 25 * 26 * This program is distributed in the hope that it will be useful, 27 * but WITHOUT ANY WARRANTY; without even the implied warranty of 28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 29 * GNU General Public License for more details. 30 * 31 * You should have received a copy of the GNU General Public License 32 * along with this program; if not, write to the Free Software 33 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 34 * MA 02111-1307 USA 35 * 36 */ 37 38 /* 39 * How it works: 40 * 41 * Since this is a bootloader, the devices will not be automatic 42 * (re)configured on hotplug, but after a restart of the USB the 43 * device should work. 44 * 45 * For each transfer (except "Interrupt") we wait for completion. 46 */ 47 #include <common.h> 48 #include <command.h> 49 #include <asm/processor.h> 50 #include <linux/compiler.h> 51 #include <linux/ctype.h> 52 #include <asm/byteorder.h> 53 #include <asm/unaligned.h> 54 55 #include <usb.h> 56 #ifdef CONFIG_4xx 57 #include <asm/4xx_pci.h> 58 #endif 59 60 #ifdef DEBUG 61 #define USB_DEBUG 1 62 #define USB_HUB_DEBUG 1 63 #else 64 #define USB_DEBUG 0 65 #define USB_HUB_DEBUG 0 66 #endif 67 68 #define USB_PRINTF(fmt, args...) debug_cond(USB_DEBUG, fmt, ##args) 69 #define USB_HUB_PRINTF(fmt, args...) debug_cond(USB_HUB_DEBUG, fmt, ##args) 70 71 #define USB_BUFSIZ 512 72 73 static struct usb_device usb_dev[USB_MAX_DEVICE]; 74 static int dev_index; 75 static int asynch_allowed; 76 77 char usb_started; /* flag for the started/stopped USB status */ 78 79 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT 80 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1 81 #endif 82 83 /*************************************************************************** 84 * Init USB Device 85 */ 86 int usb_init(void) 87 { 88 void *ctrl; 89 struct usb_device *dev; 90 int i, start_index = 0; 91 92 dev_index = 0; 93 asynch_allowed = 1; 94 usb_hub_reset(); 95 96 /* first make all devices unknown */ 97 for (i = 0; i < USB_MAX_DEVICE; i++) { 98 memset(&usb_dev[i], 0, sizeof(struct usb_device)); 99 usb_dev[i].devnum = -1; 100 } 101 102 /* init low_level USB */ 103 for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) { 104 /* init low_level USB */ 105 printf("USB%d: ", i); 106 if (usb_lowlevel_init(i, &ctrl)) { 107 puts("lowlevel init failed\n"); 108 continue; 109 } 110 /* 111 * lowlevel init is OK, now scan the bus for devices 112 * i.e. search HUBs and configure them 113 */ 114 start_index = dev_index; 115 printf("scanning bus %d for devices... ", i); 116 dev = usb_alloc_new_device(ctrl); 117 /* 118 * device 0 is always present 119 * (root hub, so let it analyze) 120 */ 121 if (dev) 122 usb_new_device(dev); 123 124 if (start_index == dev_index) 125 puts("No USB Device found\n"); 126 else 127 printf("%d USB Device(s) found\n", 128 dev_index - start_index); 129 130 usb_started = 1; 131 } 132 133 USB_PRINTF("scan end\n"); 134 /* if we were not able to find at least one working bus, bail out */ 135 if (!usb_started) { 136 puts("USB error: all controllers failed lowlevel init\n"); 137 return -1; 138 } 139 140 return 0; 141 } 142 143 /****************************************************************************** 144 * Stop USB this stops the LowLevel Part and deregisters USB devices. 145 */ 146 int usb_stop(void) 147 { 148 int i; 149 150 if (usb_started) { 151 asynch_allowed = 1; 152 usb_started = 0; 153 usb_hub_reset(); 154 155 for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) { 156 if (usb_lowlevel_stop(i)) 157 printf("failed to stop USB controller %d\n", i); 158 } 159 } 160 161 return 0; 162 } 163 164 /* 165 * disables the asynch behaviour of the control message. This is used for data 166 * transfers that uses the exclusiv access to the control and bulk messages. 167 * Returns the old value so it can be restored later. 168 */ 169 int usb_disable_asynch(int disable) 170 { 171 int old_value = asynch_allowed; 172 173 asynch_allowed = !disable; 174 return old_value; 175 } 176 177 178 /*------------------------------------------------------------------- 179 * Message wrappers. 180 * 181 */ 182 183 /* 184 * submits an Interrupt Message 185 */ 186 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe, 187 void *buffer, int transfer_len, int interval) 188 { 189 return submit_int_msg(dev, pipe, buffer, transfer_len, interval); 190 } 191 192 /* 193 * submits a control message and waits for comletion (at least timeout * 1ms) 194 * If timeout is 0, we don't wait for completion (used as example to set and 195 * clear keyboards LEDs). For data transfers, (storage transfers) we don't 196 * allow control messages with 0 timeout, by previousely resetting the flag 197 * asynch_allowed (usb_disable_asynch(1)). 198 * returns the transfered length if OK or -1 if error. The transfered length 199 * and the current status are stored in the dev->act_len and dev->status. 200 */ 201 int usb_control_msg(struct usb_device *dev, unsigned int pipe, 202 unsigned char request, unsigned char requesttype, 203 unsigned short value, unsigned short index, 204 void *data, unsigned short size, int timeout) 205 { 206 ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1); 207 208 if ((timeout == 0) && (!asynch_allowed)) { 209 /* request for a asynch control pipe is not allowed */ 210 return -1; 211 } 212 213 /* set setup command */ 214 setup_packet->requesttype = requesttype; 215 setup_packet->request = request; 216 setup_packet->value = cpu_to_le16(value); 217 setup_packet->index = cpu_to_le16(index); 218 setup_packet->length = cpu_to_le16(size); 219 USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \ 220 "value 0x%X index 0x%X length 0x%X\n", 221 request, requesttype, value, index, size); 222 dev->status = USB_ST_NOT_PROC; /*not yet processed */ 223 224 if (submit_control_msg(dev, pipe, data, size, setup_packet) < 0) 225 return -1; 226 if (timeout == 0) 227 return (int)size; 228 229 /* 230 * Wait for status to update until timeout expires, USB driver 231 * interrupt handler may set the status when the USB operation has 232 * been completed. 233 */ 234 while (timeout--) { 235 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC)) 236 break; 237 mdelay(1); 238 } 239 if (dev->status) 240 return -1; 241 242 return dev->act_len; 243 244 } 245 246 /*------------------------------------------------------------------- 247 * submits bulk message, and waits for completion. returns 0 if Ok or 248 * -1 if Error. 249 * synchronous behavior 250 */ 251 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe, 252 void *data, int len, int *actual_length, int timeout) 253 { 254 if (len < 0) 255 return -1; 256 dev->status = USB_ST_NOT_PROC; /*not yet processed */ 257 if (submit_bulk_msg(dev, pipe, data, len) < 0) 258 return -1; 259 while (timeout--) { 260 if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC)) 261 break; 262 mdelay(1); 263 } 264 *actual_length = dev->act_len; 265 if (dev->status == 0) 266 return 0; 267 else 268 return -1; 269 } 270 271 272 /*------------------------------------------------------------------- 273 * Max Packet stuff 274 */ 275 276 /* 277 * returns the max packet size, depending on the pipe direction and 278 * the configurations values 279 */ 280 int usb_maxpacket(struct usb_device *dev, unsigned long pipe) 281 { 282 /* direction is out -> use emaxpacket out */ 283 if ((pipe & USB_DIR_IN) == 0) 284 return dev->epmaxpacketout[((pipe>>15) & 0xf)]; 285 else 286 return dev->epmaxpacketin[((pipe>>15) & 0xf)]; 287 } 288 289 /* 290 * The routine usb_set_maxpacket_ep() is extracted from the loop of routine 291 * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine 292 * when it is inlined in 1 single routine. What happens is that the register r3 293 * is used as loop-count 'i', but gets overwritten later on. 294 * This is clearly a compiler bug, but it is easier to workaround it here than 295 * to update the compiler (Occurs with at least several GCC 4.{1,2},x 296 * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM) 297 * 298 * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5. 299 */ 300 static void noinline 301 usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx) 302 { 303 int b; 304 struct usb_endpoint_descriptor *ep; 305 u16 ep_wMaxPacketSize; 306 307 ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx]; 308 309 b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; 310 ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize); 311 312 if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == 313 USB_ENDPOINT_XFER_CONTROL) { 314 /* Control => bidirectional */ 315 dev->epmaxpacketout[b] = ep_wMaxPacketSize; 316 dev->epmaxpacketin[b] = ep_wMaxPacketSize; 317 USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n", 318 b, dev->epmaxpacketin[b]); 319 } else { 320 if ((ep->bEndpointAddress & 0x80) == 0) { 321 /* OUT Endpoint */ 322 if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) { 323 dev->epmaxpacketout[b] = ep_wMaxPacketSize; 324 USB_PRINTF("##EP epmaxpacketout[%d] = %d\n", 325 b, dev->epmaxpacketout[b]); 326 } 327 } else { 328 /* IN Endpoint */ 329 if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) { 330 dev->epmaxpacketin[b] = ep_wMaxPacketSize; 331 USB_PRINTF("##EP epmaxpacketin[%d] = %d\n", 332 b, dev->epmaxpacketin[b]); 333 } 334 } /* if out */ 335 } /* if control */ 336 } 337 338 /* 339 * set the max packed value of all endpoints in the given configuration 340 */ 341 static int usb_set_maxpacket(struct usb_device *dev) 342 { 343 int i, ii; 344 345 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) 346 for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++) 347 usb_set_maxpacket_ep(dev, i, ii); 348 349 return 0; 350 } 351 352 /******************************************************************************* 353 * Parse the config, located in buffer, and fills the dev->config structure. 354 * Note that all little/big endian swapping are done automatically. 355 */ 356 static int usb_parse_config(struct usb_device *dev, 357 unsigned char *buffer, int cfgno) 358 { 359 struct usb_descriptor_header *head; 360 int index, ifno, epno, curr_if_num; 361 int i; 362 u16 ep_wMaxPacketSize; 363 364 ifno = -1; 365 epno = -1; 366 curr_if_num = -1; 367 368 dev->configno = cfgno; 369 head = (struct usb_descriptor_header *) &buffer[0]; 370 if (head->bDescriptorType != USB_DT_CONFIG) { 371 printf(" ERROR: NOT USB_CONFIG_DESC %x\n", 372 head->bDescriptorType); 373 return -1; 374 } 375 memcpy(&dev->config, buffer, buffer[0]); 376 le16_to_cpus(&(dev->config.desc.wTotalLength)); 377 dev->config.no_of_if = 0; 378 379 index = dev->config.desc.bLength; 380 /* Ok the first entry must be a configuration entry, 381 * now process the others */ 382 head = (struct usb_descriptor_header *) &buffer[index]; 383 while (index + 1 < dev->config.desc.wTotalLength) { 384 switch (head->bDescriptorType) { 385 case USB_DT_INTERFACE: 386 if (((struct usb_interface_descriptor *) \ 387 &buffer[index])->bInterfaceNumber != curr_if_num) { 388 /* this is a new interface, copy new desc */ 389 ifno = dev->config.no_of_if; 390 dev->config.no_of_if++; 391 memcpy(&dev->config.if_desc[ifno], 392 &buffer[index], buffer[index]); 393 dev->config.if_desc[ifno].no_of_ep = 0; 394 dev->config.if_desc[ifno].num_altsetting = 1; 395 curr_if_num = 396 dev->config.if_desc[ifno].desc.bInterfaceNumber; 397 } else { 398 /* found alternate setting for the interface */ 399 dev->config.if_desc[ifno].num_altsetting++; 400 } 401 break; 402 case USB_DT_ENDPOINT: 403 epno = dev->config.if_desc[ifno].no_of_ep; 404 /* found an endpoint */ 405 dev->config.if_desc[ifno].no_of_ep++; 406 memcpy(&dev->config.if_desc[ifno].ep_desc[epno], 407 &buffer[index], buffer[index]); 408 ep_wMaxPacketSize = get_unaligned(&dev->config.\ 409 if_desc[ifno].\ 410 ep_desc[epno].\ 411 wMaxPacketSize); 412 put_unaligned(le16_to_cpu(ep_wMaxPacketSize), 413 &dev->config.\ 414 if_desc[ifno].\ 415 ep_desc[epno].\ 416 wMaxPacketSize); 417 USB_PRINTF("if %d, ep %d\n", ifno, epno); 418 break; 419 default: 420 if (head->bLength == 0) 421 return 1; 422 423 USB_PRINTF("unknown Description Type : %x\n", 424 head->bDescriptorType); 425 426 { 427 #ifdef USB_DEBUG 428 unsigned char *ch = (unsigned char *)head; 429 #endif 430 for (i = 0; i < head->bLength; i++) 431 USB_PRINTF("%02X ", *ch++); 432 USB_PRINTF("\n\n\n"); 433 } 434 break; 435 } 436 index += head->bLength; 437 head = (struct usb_descriptor_header *)&buffer[index]; 438 } 439 return 1; 440 } 441 442 /*********************************************************************** 443 * Clears an endpoint 444 * endp: endpoint number in bits 0-3; 445 * direction flag in bit 7 (1 = IN, 0 = OUT) 446 */ 447 int usb_clear_halt(struct usb_device *dev, int pipe) 448 { 449 int result; 450 int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7); 451 452 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 453 USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0, 454 endp, NULL, 0, USB_CNTL_TIMEOUT * 3); 455 456 /* don't clear if failed */ 457 if (result < 0) 458 return result; 459 460 /* 461 * NOTE: we do not get status and verify reset was successful 462 * as some devices are reported to lock up upon this check.. 463 */ 464 465 usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe)); 466 467 /* toggle is reset on clear */ 468 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0); 469 return 0; 470 } 471 472 473 /********************************************************************** 474 * get_descriptor type 475 */ 476 static int usb_get_descriptor(struct usb_device *dev, unsigned char type, 477 unsigned char index, void *buf, int size) 478 { 479 int res; 480 res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 481 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN, 482 (type << 8) + index, 0, 483 buf, size, USB_CNTL_TIMEOUT); 484 return res; 485 } 486 487 /********************************************************************** 488 * gets configuration cfgno and store it in the buffer 489 */ 490 int usb_get_configuration_no(struct usb_device *dev, 491 unsigned char *buffer, int cfgno) 492 { 493 int result; 494 unsigned int tmp; 495 struct usb_config_descriptor *config; 496 497 config = (struct usb_config_descriptor *)&buffer[0]; 498 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9); 499 if (result < 9) { 500 if (result < 0) 501 printf("unable to get descriptor, error %lX\n", 502 dev->status); 503 else 504 printf("config descriptor too short " \ 505 "(expected %i, got %i)\n", 9, result); 506 return -1; 507 } 508 tmp = le16_to_cpu(config->wTotalLength); 509 510 if (tmp > USB_BUFSIZ) { 511 printf("usb_get_configuration_no: failed to get " \ 512 "descriptor - too long: %d\n", tmp); 513 return -1; 514 } 515 516 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp); 517 USB_PRINTF("get_conf_no %d Result %d, wLength %d\n", 518 cfgno, result, tmp); 519 return result; 520 } 521 522 /******************************************************************** 523 * set address of a device to the value in dev->devnum. 524 * This can only be done by addressing the device via the default address (0) 525 */ 526 static int usb_set_address(struct usb_device *dev) 527 { 528 int res; 529 530 USB_PRINTF("set address %d\n", dev->devnum); 531 res = usb_control_msg(dev, usb_snddefctrl(dev), 532 USB_REQ_SET_ADDRESS, 0, 533 (dev->devnum), 0, 534 NULL, 0, USB_CNTL_TIMEOUT); 535 return res; 536 } 537 538 /******************************************************************** 539 * set interface number to interface 540 */ 541 int usb_set_interface(struct usb_device *dev, int interface, int alternate) 542 { 543 struct usb_interface *if_face = NULL; 544 int ret, i; 545 546 for (i = 0; i < dev->config.desc.bNumInterfaces; i++) { 547 if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) { 548 if_face = &dev->config.if_desc[i]; 549 break; 550 } 551 } 552 if (!if_face) { 553 printf("selecting invalid interface %d", interface); 554 return -1; 555 } 556 /* 557 * We should return now for devices with only one alternate setting. 558 * According to 9.4.10 of the Universal Serial Bus Specification 559 * Revision 2.0 such devices can return with a STALL. This results in 560 * some USB sticks timeouting during initialization and then being 561 * unusable in U-Boot. 562 */ 563 if (if_face->num_altsetting == 1) 564 return 0; 565 566 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 567 USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE, 568 alternate, interface, NULL, 0, 569 USB_CNTL_TIMEOUT * 5); 570 if (ret < 0) 571 return ret; 572 573 return 0; 574 } 575 576 /******************************************************************** 577 * set configuration number to configuration 578 */ 579 static int usb_set_configuration(struct usb_device *dev, int configuration) 580 { 581 int res; 582 USB_PRINTF("set configuration %d\n", configuration); 583 /* set setup command */ 584 res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 585 USB_REQ_SET_CONFIGURATION, 0, 586 configuration, 0, 587 NULL, 0, USB_CNTL_TIMEOUT); 588 if (res == 0) { 589 dev->toggle[0] = 0; 590 dev->toggle[1] = 0; 591 return 0; 592 } else 593 return -1; 594 } 595 596 /******************************************************************** 597 * set protocol to protocol 598 */ 599 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol) 600 { 601 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 602 USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE, 603 protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT); 604 } 605 606 /******************************************************************** 607 * set idle 608 */ 609 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id) 610 { 611 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 612 USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, 613 (duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT); 614 } 615 616 /******************************************************************** 617 * get report 618 */ 619 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type, 620 unsigned char id, void *buf, int size) 621 { 622 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 623 USB_REQ_GET_REPORT, 624 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, 625 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT); 626 } 627 628 /******************************************************************** 629 * get class descriptor 630 */ 631 int usb_get_class_descriptor(struct usb_device *dev, int ifnum, 632 unsigned char type, unsigned char id, void *buf, int size) 633 { 634 return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 635 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN, 636 (type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT); 637 } 638 639 /******************************************************************** 640 * get string index in buffer 641 */ 642 static int usb_get_string(struct usb_device *dev, unsigned short langid, 643 unsigned char index, void *buf, int size) 644 { 645 int i; 646 int result; 647 648 for (i = 0; i < 3; ++i) { 649 /* some devices are flaky */ 650 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 651 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN, 652 (USB_DT_STRING << 8) + index, langid, buf, size, 653 USB_CNTL_TIMEOUT); 654 655 if (result > 0) 656 break; 657 } 658 659 return result; 660 } 661 662 663 static void usb_try_string_workarounds(unsigned char *buf, int *length) 664 { 665 int newlength, oldlength = *length; 666 667 for (newlength = 2; newlength + 1 < oldlength; newlength += 2) 668 if (!isprint(buf[newlength]) || buf[newlength + 1]) 669 break; 670 671 if (newlength > 2) { 672 buf[0] = newlength; 673 *length = newlength; 674 } 675 } 676 677 678 static int usb_string_sub(struct usb_device *dev, unsigned int langid, 679 unsigned int index, unsigned char *buf) 680 { 681 int rc; 682 683 /* Try to read the string descriptor by asking for the maximum 684 * possible number of bytes */ 685 rc = usb_get_string(dev, langid, index, buf, 255); 686 687 /* If that failed try to read the descriptor length, then 688 * ask for just that many bytes */ 689 if (rc < 2) { 690 rc = usb_get_string(dev, langid, index, buf, 2); 691 if (rc == 2) 692 rc = usb_get_string(dev, langid, index, buf, buf[0]); 693 } 694 695 if (rc >= 2) { 696 if (!buf[0] && !buf[1]) 697 usb_try_string_workarounds(buf, &rc); 698 699 /* There might be extra junk at the end of the descriptor */ 700 if (buf[0] < rc) 701 rc = buf[0]; 702 703 rc = rc - (rc & 1); /* force a multiple of two */ 704 } 705 706 if (rc < 2) 707 rc = -1; 708 709 return rc; 710 } 711 712 713 /******************************************************************** 714 * usb_string: 715 * Get string index and translate it to ascii. 716 * returns string length (> 0) or error (< 0) 717 */ 718 int usb_string(struct usb_device *dev, int index, char *buf, size_t size) 719 { 720 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ); 721 unsigned char *tbuf; 722 int err; 723 unsigned int u, idx; 724 725 if (size <= 0 || !buf || !index) 726 return -1; 727 buf[0] = 0; 728 tbuf = &mybuf[0]; 729 730 /* get langid for strings if it's not yet known */ 731 if (!dev->have_langid) { 732 err = usb_string_sub(dev, 0, 0, tbuf); 733 if (err < 0) { 734 USB_PRINTF("error getting string descriptor 0 " \ 735 "(error=%lx)\n", dev->status); 736 return -1; 737 } else if (tbuf[0] < 4) { 738 USB_PRINTF("string descriptor 0 too short\n"); 739 return -1; 740 } else { 741 dev->have_langid = -1; 742 dev->string_langid = tbuf[2] | (tbuf[3] << 8); 743 /* always use the first langid listed */ 744 USB_PRINTF("USB device number %d default " \ 745 "language ID 0x%x\n", 746 dev->devnum, dev->string_langid); 747 } 748 } 749 750 err = usb_string_sub(dev, dev->string_langid, index, tbuf); 751 if (err < 0) 752 return err; 753 754 size--; /* leave room for trailing NULL char in output buffer */ 755 for (idx = 0, u = 2; u < err; u += 2) { 756 if (idx >= size) 757 break; 758 if (tbuf[u+1]) /* high byte */ 759 buf[idx++] = '?'; /* non-ASCII character */ 760 else 761 buf[idx++] = tbuf[u]; 762 } 763 buf[idx] = 0; 764 err = idx; 765 return err; 766 } 767 768 769 /******************************************************************** 770 * USB device handling: 771 * the USB device are static allocated [USB_MAX_DEVICE]. 772 */ 773 774 775 /* returns a pointer to the device with the index [index]. 776 * if the device is not assigned (dev->devnum==-1) returns NULL 777 */ 778 struct usb_device *usb_get_dev_index(int index) 779 { 780 if (usb_dev[index].devnum == -1) 781 return NULL; 782 else 783 return &usb_dev[index]; 784 } 785 786 /* returns a pointer of a new device structure or NULL, if 787 * no device struct is available 788 */ 789 struct usb_device *usb_alloc_new_device(void *controller) 790 { 791 int i; 792 USB_PRINTF("New Device %d\n", dev_index); 793 if (dev_index == USB_MAX_DEVICE) { 794 printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE); 795 return NULL; 796 } 797 /* default Address is 0, real addresses start with 1 */ 798 usb_dev[dev_index].devnum = dev_index + 1; 799 usb_dev[dev_index].maxchild = 0; 800 for (i = 0; i < USB_MAXCHILDREN; i++) 801 usb_dev[dev_index].children[i] = NULL; 802 usb_dev[dev_index].parent = NULL; 803 usb_dev[dev_index].controller = controller; 804 dev_index++; 805 return &usb_dev[dev_index - 1]; 806 } 807 808 809 /* 810 * By the time we get here, the device has gotten a new device ID 811 * and is in the default state. We need to identify the thing and 812 * get the ball rolling.. 813 * 814 * Returns 0 for success, != 0 for error. 815 */ 816 int usb_new_device(struct usb_device *dev) 817 { 818 int addr, err; 819 int tmp; 820 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ); 821 822 /* We still haven't set the Address yet */ 823 addr = dev->devnum; 824 dev->devnum = 0; 825 826 #ifdef CONFIG_LEGACY_USB_INIT_SEQ 827 /* this is the old and known way of initializing devices, it is 828 * different than what Windows and Linux are doing. Windows and Linux 829 * both retrieve 64 bytes while reading the device descriptor 830 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an 831 * invalid header while reading 8 bytes as device descriptor. */ 832 dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */ 833 dev->maxpacketsize = PACKET_SIZE_8; 834 dev->epmaxpacketin[0] = 8; 835 dev->epmaxpacketout[0] = 8; 836 837 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, tmpbuf, 8); 838 if (err < 8) { 839 printf("\n USB device not responding, " \ 840 "giving up (status=%lX)\n", dev->status); 841 return 1; 842 } 843 memcpy(&dev->descriptor, tmpbuf, 8); 844 #else 845 /* This is a Windows scheme of initialization sequence, with double 846 * reset of the device (Linux uses the same sequence) 847 * Some equipment is said to work only with such init sequence; this 848 * patch is based on the work by Alan Stern: 849 * http://sourceforge.net/mailarchive/forum.php? 850 * thread_id=5729457&forum_id=5398 851 */ 852 struct usb_device_descriptor *desc; 853 int port = -1; 854 struct usb_device *parent = dev->parent; 855 unsigned short portstatus; 856 857 /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is 858 * only 18 bytes long, this will terminate with a short packet. But if 859 * the maxpacket size is 8 or 16 the device may be waiting to transmit 860 * some more, or keeps on retransmitting the 8 byte header. */ 861 862 desc = (struct usb_device_descriptor *)tmpbuf; 863 dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */ 864 /* Default to 64 byte max packet size */ 865 dev->maxpacketsize = PACKET_SIZE_64; 866 dev->epmaxpacketin[0] = 64; 867 dev->epmaxpacketout[0] = 64; 868 869 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64); 870 if (err < 0) { 871 USB_PRINTF("usb_new_device: usb_get_descriptor() failed\n"); 872 return 1; 873 } 874 875 dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0; 876 877 /* find the port number we're at */ 878 if (parent) { 879 int j; 880 881 for (j = 0; j < parent->maxchild; j++) { 882 if (parent->children[j] == dev) { 883 port = j; 884 break; 885 } 886 } 887 if (port < 0) { 888 printf("usb_new_device:cannot locate device's port.\n"); 889 return 1; 890 } 891 892 /* reset the port for the second time */ 893 err = hub_port_reset(dev->parent, port, &portstatus); 894 if (err < 0) { 895 printf("\n Couldn't reset port %i\n", port); 896 return 1; 897 } 898 } 899 #endif 900 901 dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0; 902 dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0; 903 switch (dev->descriptor.bMaxPacketSize0) { 904 case 8: 905 dev->maxpacketsize = PACKET_SIZE_8; 906 break; 907 case 16: 908 dev->maxpacketsize = PACKET_SIZE_16; 909 break; 910 case 32: 911 dev->maxpacketsize = PACKET_SIZE_32; 912 break; 913 case 64: 914 dev->maxpacketsize = PACKET_SIZE_64; 915 break; 916 } 917 dev->devnum = addr; 918 919 err = usb_set_address(dev); /* set address */ 920 921 if (err < 0) { 922 printf("\n USB device not accepting new address " \ 923 "(error=%lX)\n", dev->status); 924 return 1; 925 } 926 927 mdelay(10); /* Let the SET_ADDRESS settle */ 928 929 tmp = sizeof(dev->descriptor); 930 931 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, 932 tmpbuf, sizeof(dev->descriptor)); 933 if (err < tmp) { 934 if (err < 0) 935 printf("unable to get device descriptor (error=%d)\n", 936 err); 937 else 938 printf("USB device descriptor short read " \ 939 "(expected %i, got %i)\n", tmp, err); 940 return 1; 941 } 942 memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor)); 943 /* correct le values */ 944 le16_to_cpus(&dev->descriptor.bcdUSB); 945 le16_to_cpus(&dev->descriptor.idVendor); 946 le16_to_cpus(&dev->descriptor.idProduct); 947 le16_to_cpus(&dev->descriptor.bcdDevice); 948 /* only support for one config for now */ 949 err = usb_get_configuration_no(dev, tmpbuf, 0); 950 if (err < 0) { 951 printf("usb_new_device: Cannot read configuration, " \ 952 "skipping device %04x:%04x\n", 953 dev->descriptor.idVendor, dev->descriptor.idProduct); 954 return -1; 955 } 956 usb_parse_config(dev, tmpbuf, 0); 957 usb_set_maxpacket(dev); 958 /* we set the default configuration here */ 959 if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) { 960 printf("failed to set default configuration " \ 961 "len %d, status %lX\n", dev->act_len, dev->status); 962 return -1; 963 } 964 USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n", 965 dev->descriptor.iManufacturer, dev->descriptor.iProduct, 966 dev->descriptor.iSerialNumber); 967 memset(dev->mf, 0, sizeof(dev->mf)); 968 memset(dev->prod, 0, sizeof(dev->prod)); 969 memset(dev->serial, 0, sizeof(dev->serial)); 970 if (dev->descriptor.iManufacturer) 971 usb_string(dev, dev->descriptor.iManufacturer, 972 dev->mf, sizeof(dev->mf)); 973 if (dev->descriptor.iProduct) 974 usb_string(dev, dev->descriptor.iProduct, 975 dev->prod, sizeof(dev->prod)); 976 if (dev->descriptor.iSerialNumber) 977 usb_string(dev, dev->descriptor.iSerialNumber, 978 dev->serial, sizeof(dev->serial)); 979 USB_PRINTF("Manufacturer %s\n", dev->mf); 980 USB_PRINTF("Product %s\n", dev->prod); 981 USB_PRINTF("SerialNumber %s\n", dev->serial); 982 /* now prode if the device is a hub */ 983 usb_hub_probe(dev, 0); 984 return 0; 985 } 986 987 /* EOF */ 988