1 /* 2 * PXA27x USB device driver for u-boot. 3 * 4 * Copyright (C) 2007 Rodolfo Giometti <giometti@linux.it> 5 * Copyright (C) 2007 Eurotech S.p.A. <info@eurotech.it> 6 * Copyright (C) 2008 Vivek Kutal <vivek.kutal@azingo.com> 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 * 23 */ 24 25 26 #include <common.h> 27 #include <config.h> 28 #include <asm/byteorder.h> 29 #include <usbdcore.h> 30 #include <usbdcore_ep0.h> 31 #include <asm/arch/hardware.h> 32 #include <usb/pxa27x_udc.h> 33 34 /* number of endpoints on this UDC */ 35 #define UDC_MAX_ENDPOINTS 24 36 37 static struct urb *ep0_urb; 38 static struct usb_device_instance *udc_device; 39 static int ep0state = EP0_IDLE; 40 41 #ifdef USBDDBG 42 static void udc_dump_buffer(char *name, u8 *buf, int len) 43 { 44 usbdbg("%s - buf %p, len %d", name, buf, len); 45 print_buffer(0, buf, 1, len, 0); 46 } 47 #else 48 #define udc_dump_buffer(name, buf, len) /* void */ 49 #endif 50 51 static inline void udc_ack_int_UDCCR(int mask) 52 { 53 USIR1 = mask | USIR1; 54 } 55 56 /* 57 * If the endpoint has an active tx_urb, then the next packet of data from the 58 * URB is written to the tx FIFO. 59 * The total amount of data in the urb is given by urb->actual_length. 60 * The maximum amount of data that can be sent in any one packet is given by 61 * endpoint->tx_packetSize. 62 * The number of data bytes from this URB that have already been transmitted 63 * is given by endpoint->sent. 64 * endpoint->last is updated by this routine with the number of data bytes 65 * transmitted in this packet. 66 */ 67 static int udc_write_urb(struct usb_endpoint_instance *endpoint) 68 { 69 struct urb *urb = endpoint->tx_urb; 70 int ep_num = endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK; 71 u32 *addr32 = (u32 *) &UDCDN(ep_num); 72 u32 *data32 = (u32 *) urb->buffer; 73 u8 *addr8 = (u8 *) &UDCDN(ep_num); 74 u8 *data8 = (u8 *) urb->buffer; 75 unsigned int i, n, w, b, is_short; 76 int timeout = 2000; /* 2ms */ 77 78 if (!urb || !urb->actual_length) 79 return -1; 80 81 n = MIN(urb->actual_length - endpoint->sent, endpoint->tx_packetSize); 82 if (n <= 0) 83 return -1; 84 85 usbdbg("write urb on ep %d", ep_num); 86 #if defined(USBDDBG) && defined(USBDPARANOIA) 87 usbdbg("urb: buf %p, buf_len %d, actual_len %d", 88 urb->buffer, urb->buffer_length, urb->actual_length); 89 usbdbg("endpoint: sent %d, tx_packetSize %d, last %d", 90 endpoint->sent, endpoint->tx_packetSize, endpoint->last); 91 #endif 92 93 is_short = n != endpoint->tx_packetSize; 94 w = n / 4; 95 b = n % 4; 96 usbdbg("n %d%s w %d b %d", n, is_short ? "-s" : "", w, b); 97 udc_dump_buffer("urb write", data8 + endpoint->sent, n); 98 99 /* Prepare for data send */ 100 if (ep_num) 101 UDCCSN(ep_num) = UDCCSR_PC; 102 103 for (i = 0; i < w; i++) 104 *addr32 = data32[endpoint->sent/4 + i]; 105 for (i = 0; i < b; i++) 106 *addr8 = data8[endpoint->sent + w*4 + i]; 107 108 /* Set "Packet Complete" if less data then tx_packetSize */ 109 if (is_short) 110 UDCCSN(ep_num) = ep_num ? UDCCSR_SP : UDCCSR0_IPR; 111 112 /* Wait for data sent */ 113 while (!(UDCCSN(ep_num) & (ep_num ? UDCCSR_PC : UDCCSR0_IPR))) { 114 if (ep_num) { 115 if (timeout-- == 0) 116 return -1; 117 else 118 udelay(1); 119 }; 120 } 121 endpoint->last = n; 122 123 if (ep_num) { 124 usbd_tx_complete(endpoint); 125 } else { 126 endpoint->sent += n; 127 endpoint->last -= n; 128 } 129 130 if ((endpoint->tx_urb->actual_length - endpoint->sent) <= 0) { 131 urb->actual_length = 0; 132 endpoint->sent = 0; 133 endpoint->last = 0; 134 } 135 136 if ((endpoint->sent >= urb->actual_length) && (!ep_num)) { 137 usbdbg("ep0 IN stage done"); 138 if (is_short) 139 ep0state = EP0_IDLE; 140 else 141 ep0state = EP0_XFER_COMPLETE; 142 } 143 144 return 0; 145 } 146 147 static int udc_read_urb(struct usb_endpoint_instance *endpoint) 148 { 149 struct urb *urb = endpoint->rcv_urb; 150 int ep_num = endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK; 151 u32 *addr32 = (u32 *) &UDCDN(ep_num); 152 u32 *data32 = (u32 *) urb->buffer; 153 unsigned int i, n, is_short ; 154 155 usbdbg("read urb on ep %d", ep_num); 156 #if defined(USBDDBG) && defined(USBDPARANOIA) 157 usbdbg("urb: buf %p, buf_len %d, actual_len %d", 158 urb->buffer, urb->buffer_length, urb->actual_length); 159 usbdbg("endpoint: rcv_packetSize %d", 160 endpoint->rcv_packetSize); 161 #endif 162 163 if (UDCCSN(ep_num) & UDCCSR_BNE) 164 n = UDCBCN(ep_num) & 0x3ff; 165 else /* zlp */ 166 n = 0; 167 is_short = n != endpoint->rcv_packetSize; 168 169 usbdbg("n %d%s", n, is_short ? "-s" : ""); 170 for (i = 0; i < n; i += 4) 171 data32[urb->actual_length/4 + i/4] = *addr32; 172 173 udc_dump_buffer("urb read", (u8 *) data32, urb->actual_length + n); 174 usbd_rcv_complete(endpoint, n, 0); 175 176 return 0; 177 } 178 179 static int udc_read_urb_ep0(void) 180 { 181 u32 *addr32 = (u32 *) &UDCDN(0); 182 u32 *data32 = (u32 *) ep0_urb->buffer; 183 u8 *addr8 = (u8 *) &UDCDN(0); 184 u8 *data8 = (u8 *) ep0_urb->buffer; 185 unsigned int i, n, w, b; 186 187 n = UDCBCR0; 188 w = n / 4; 189 b = n % 4; 190 191 for (i = 0; i < w; i++) { 192 data32[ep0_urb->actual_length/4 + i] = *addr32; 193 ep0_urb->actual_length += 4; 194 } 195 196 for (i = 0; i < b; i++) { 197 data8[ep0_urb->actual_length + w*4 + i] = *addr8; 198 ep0_urb->actual_length++; 199 } 200 201 UDCCSR0 = UDCCSR0_OPC | UDCCSR0_IPR; 202 if (ep0_urb->actual_length == ep0_urb->device_request.wLength) 203 return 1; 204 205 return 0; 206 } 207 208 static void udc_handle_ep0(struct usb_endpoint_instance *endpoint) 209 { 210 u32 udccsr0 = UDCCSR0; 211 u32 *data = (u32 *) &ep0_urb->device_request; 212 int i; 213 214 usbdbg("udccsr0 %x", udccsr0); 215 216 /* Clear stall status */ 217 if (udccsr0 & UDCCSR0_SST) { 218 usberr("clear stall status"); 219 UDCCSR0 = UDCCSR0_SST; 220 ep0state = EP0_IDLE; 221 } 222 223 /* previous request unfinished? non-error iff back-to-back ... */ 224 if ((udccsr0 & UDCCSR0_SA) != 0 && ep0state != EP0_IDLE) 225 ep0state = EP0_IDLE; 226 227 switch (ep0state) { 228 229 case EP0_IDLE: 230 231 udccsr0 = UDCCSR0; 232 /* Start control request? */ 233 if ((udccsr0 & (UDCCSR0_OPC | UDCCSR0_SA | UDCCSR0_RNE)) 234 == (UDCCSR0_OPC | UDCCSR0_SA | UDCCSR0_RNE)) { 235 236 /* Read SETUP packet. 237 * SETUP packet size is 8 bytes (aka 2 words) 238 */ 239 usbdbg("try reading SETUP packet"); 240 for (i = 0; i < 2; i++) { 241 if ((UDCCSR0 & UDCCSR0_RNE) == 0) { 242 usberr("setup packet too short:%d", i); 243 goto stall; 244 } 245 data[i] = UDCDR0; 246 } 247 248 UDCCSR0 |= (UDCCSR0_OPC | UDCCSR0_SA); 249 if ((UDCCSR0 & UDCCSR0_RNE) != 0) { 250 usberr("setup packet too long"); 251 goto stall; 252 } 253 254 udc_dump_buffer("ep0 setup read", (u8 *) data, 8); 255 256 if (ep0_urb->device_request.wLength == 0) { 257 usbdbg("Zero Data control Packet\n"); 258 if (ep0_recv_setup(ep0_urb)) { 259 usberr("Invalid Setup Packet\n"); 260 udc_dump_buffer("ep0 setup read", 261 (u8 *)data, 8); 262 goto stall; 263 } 264 UDCCSR0 = UDCCSR0_IPR; 265 ep0state = EP0_IDLE; 266 } else { 267 /* Check direction */ 268 if ((ep0_urb->device_request.bmRequestType & 269 USB_REQ_DIRECTION_MASK) 270 == USB_REQ_HOST2DEVICE) { 271 ep0state = EP0_OUT_DATA; 272 ep0_urb->buffer = 273 (u8 *)ep0_urb->buffer_data; 274 ep0_urb->buffer_length = 275 sizeof(ep0_urb->buffer_data); 276 ep0_urb->actual_length = 0; 277 UDCCSR0 = UDCCSR0_IPR; 278 } else { 279 /* The ep0_recv_setup function has 280 * already placed our response packet 281 * data in ep0_urb->buffer and the 282 * packet length in 283 * ep0_urb->actual_length. 284 */ 285 if (ep0_recv_setup(ep0_urb)) { 286 stall: 287 usberr("Invalid setup packet"); 288 udc_dump_buffer("ep0 setup read" 289 , (u8 *) data, 8); 290 ep0state = EP0_IDLE; 291 292 UDCCSR0 = UDCCSR0_SA | 293 UDCCSR0_OPC | UDCCSR0_FST | 294 UDCCS0_FTF; 295 296 return; 297 } 298 299 endpoint->tx_urb = ep0_urb; 300 endpoint->sent = 0; 301 usbdbg("EP0_IN_DATA"); 302 ep0state = EP0_IN_DATA; 303 if (udc_write_urb(endpoint) < 0) 304 goto stall; 305 306 } 307 } 308 return; 309 } else if ((udccsr0 & (UDCCSR0_OPC | UDCCSR0_SA)) 310 == (UDCCSR0_OPC|UDCCSR0_SA)) { 311 usberr("Setup Active but no data. Stalling ....\n"); 312 goto stall; 313 } else { 314 usbdbg("random early IRQs"); 315 /* Some random early IRQs: 316 * - we acked FST 317 * - IPR cleared 318 * - OPC got set, without SA (likely status stage) 319 */ 320 UDCCSR0 = udccsr0 & (UDCCSR0_SA | UDCCSR0_OPC); 321 } 322 break; 323 324 case EP0_OUT_DATA: 325 326 if ((udccsr0 & UDCCSR0_OPC) && !(udccsr0 & UDCCSR0_SA)) { 327 if (udc_read_urb_ep0()) { 328 read_complete: 329 ep0state = EP0_IDLE; 330 if (ep0_recv_setup(ep0_urb)) { 331 /* Not a setup packet, stall next 332 * EP0 transaction 333 */ 334 udc_dump_buffer("ep0 setup read", 335 (u8 *) data, 8); 336 usberr("can't parse setup packet\n"); 337 goto stall; 338 } 339 } 340 } else if (!(udccsr0 & UDCCSR0_OPC) && 341 !(udccsr0 & UDCCSR0_IPR)) { 342 if (ep0_urb->device_request.wLength == 343 ep0_urb->actual_length) 344 goto read_complete; 345 346 usberr("Premature Status\n"); 347 ep0state = EP0_IDLE; 348 } 349 break; 350 351 case EP0_IN_DATA: 352 /* GET_DESCRIPTOR etc */ 353 if (udccsr0 & UDCCSR0_OPC) { 354 UDCCSR0 = UDCCSR0_OPC | UDCCSR0_FTF; 355 usberr("ep0in premature status"); 356 ep0state = EP0_IDLE; 357 } else { 358 /* irq was IPR clearing */ 359 if (udc_write_urb(endpoint) < 0) { 360 usberr("ep0_write_error\n"); 361 goto stall; 362 } 363 } 364 break; 365 366 case EP0_XFER_COMPLETE: 367 UDCCSR0 = UDCCSR0_IPR; 368 ep0state = EP0_IDLE; 369 break; 370 371 default: 372 usbdbg("Default\n"); 373 } 374 USIR0 = USIR0_IR0; 375 } 376 377 static void udc_handle_ep(struct usb_endpoint_instance *endpoint) 378 { 379 int ep_addr = endpoint->endpoint_address; 380 int ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK; 381 int ep_isout = (ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT; 382 383 u32 flags = UDCCSN(ep_num) & (UDCCSR_SST | UDCCSR_TRN); 384 if (flags) 385 UDCCSN(ep_num) = flags; 386 387 if (ep_isout) 388 udc_read_urb(endpoint); 389 else 390 udc_write_urb(endpoint); 391 392 UDCCSN(ep_num) = UDCCSR_PC; 393 } 394 395 static void udc_state_changed(void) 396 { 397 int config, interface, alternate; 398 399 UDCCR |= UDCCR_SMAC; 400 401 config = (UDCCR & UDCCR_ACN) >> UDCCR_ACN_S; 402 interface = (UDCCR & UDCCR_AIN) >> UDCCR_AIN_S; 403 alternate = (UDCCR & UDCCR_AAISN) >> UDCCR_AAISN_S; 404 405 usbdbg("New UDC settings are: conf %d - inter %d - alter %d", 406 config, interface, alternate); 407 408 usbd_device_event_irq(udc_device, DEVICE_CONFIGURED, 0); 409 UDCISR1 = UDCISR1_IRCC; 410 } 411 412 void udc_irq(void) 413 { 414 int handled; 415 struct usb_endpoint_instance *endpoint; 416 int ep_num, i; 417 u32 udcisr0; 418 419 do { 420 handled = 0; 421 /* Suspend Interrupt Request */ 422 if (USIR1 & UDCCR_SUSIR) { 423 usbdbg("Suspend\n"); 424 udc_ack_int_UDCCR(UDCCR_SUSIR); 425 handled = 1; 426 ep0state = EP0_IDLE; 427 } 428 429 /* Resume Interrupt Request */ 430 if (USIR1 & UDCCR_RESIR) { 431 udc_ack_int_UDCCR(UDCCR_RESIR); 432 handled = 1; 433 usbdbg("USB resume\n"); 434 } 435 436 if (USIR1 & (1<<31)) { 437 handled = 1; 438 udc_state_changed(); 439 } 440 441 /* Reset Interrupt Request */ 442 if (USIR1 & UDCCR_RSTIR) { 443 udc_ack_int_UDCCR(UDCCR_RSTIR); 444 handled = 1; 445 usbdbg("Reset\n"); 446 usbd_device_event_irq(udc_device, DEVICE_RESET, 0); 447 } else { 448 if (USIR0) 449 usbdbg("UISR0: %x \n", USIR0); 450 451 if (USIR0 & 0x2) 452 USIR0 = 0x2; 453 454 /* Control traffic */ 455 if (USIR0 & USIR0_IR0) { 456 handled = 1; 457 udc_handle_ep0(udc_device->bus->endpoint_array); 458 USIR0 = USIR0_IR0; 459 } 460 461 endpoint = udc_device->bus->endpoint_array; 462 for (i = 0; i < udc_device->bus->max_endpoints; i++) { 463 ep_num = (endpoint[i].endpoint_address) & 464 USB_ENDPOINT_NUMBER_MASK; 465 if (!ep_num) 466 continue; 467 udcisr0 = UDCISR0; 468 if (udcisr0 & 469 UDCISR_INT(ep_num, UDC_INT_PACKETCMP)) { 470 UDCISR0 = UDCISR_INT(ep_num, 471 UDC_INT_PACKETCMP); 472 udc_handle_ep(&endpoint[i]); 473 } 474 } 475 } 476 477 } while (handled); 478 } 479 480 /* The UDCCR reg contains mask and interrupt status bits, 481 * so using '|=' isn't safe as it may ack an interrupt. 482 */ 483 #define UDCCR_OEN (1 << 31) /* On-the-Go Enable */ 484 #define UDCCR_MASK_BITS (UDCCR_OEN | UDCCR_UDE) 485 486 static inline void udc_set_mask_UDCCR(int mask) 487 { 488 UDCCR = (UDCCR & UDCCR_MASK_BITS) | (mask & UDCCR_MASK_BITS); 489 } 490 491 static inline void udc_clear_mask_UDCCR(int mask) 492 { 493 UDCCR = (UDCCR & UDCCR_MASK_BITS) & ~(mask & UDCCR_MASK_BITS); 494 } 495 496 static void pio_irq_enable(int ep_num) 497 { 498 if (ep_num < 16) 499 UDCICR0 |= 3 << (ep_num * 2); 500 else { 501 ep_num -= 16; 502 UDCICR1 |= 3 << (ep_num * 2); 503 } 504 } 505 506 /* 507 * udc_set_nak 508 * 509 * Allow upper layers to signal lower layers should not accept more RX data 510 */ 511 void udc_set_nak(int ep_num) 512 { 513 /* TODO */ 514 } 515 516 /* 517 * udc_unset_nak 518 * 519 * Suspend sending of NAK tokens for DATA OUT tokens on a given endpoint. 520 * Switch off NAKing on this endpoint to accept more data output from host. 521 */ 522 void udc_unset_nak(int ep_num) 523 { 524 /* TODO */ 525 } 526 527 int udc_endpoint_write(struct usb_endpoint_instance *endpoint) 528 { 529 return udc_write_urb(endpoint); 530 } 531 532 /* Associate a physical endpoint with endpoint instance */ 533 void udc_setup_ep(struct usb_device_instance *device, unsigned int id, 534 struct usb_endpoint_instance *endpoint) 535 { 536 int ep_num, ep_addr, ep_isout, ep_type, ep_size; 537 int config, interface, alternate; 538 u32 tmp; 539 540 usbdbg("setting up endpoint id %d", id); 541 542 if (!endpoint) { 543 usberr("endpoint void!"); 544 return; 545 } 546 547 ep_num = endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK; 548 if (ep_num >= UDC_MAX_ENDPOINTS) { 549 usberr("unable to setup ep %d!", ep_num); 550 return; 551 } 552 553 pio_irq_enable(ep_num); 554 if (ep_num == 0) { 555 /* Done for ep0 */ 556 return; 557 } 558 559 config = 1; 560 interface = 0; 561 alternate = 0; 562 563 usbdbg("config %d - interface %d - alternate %d", 564 config, interface, alternate); 565 566 ep_addr = endpoint->endpoint_address; 567 ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK; 568 ep_isout = (ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT; 569 ep_type = ep_isout ? endpoint->rcv_attributes : endpoint->tx_attributes; 570 ep_size = ep_isout ? endpoint->rcv_packetSize : endpoint->tx_packetSize; 571 572 usbdbg("addr %x, num %d, dir %s, type %s, packet size %d", 573 ep_addr, ep_num, 574 ep_isout ? "out" : "in", 575 ep_type == USB_ENDPOINT_XFER_ISOC ? "isoc" : 576 ep_type == USB_ENDPOINT_XFER_BULK ? "bulk" : 577 ep_type == USB_ENDPOINT_XFER_INT ? "int" : "???", 578 ep_size 579 ); 580 581 /* Configure UDCCRx */ 582 tmp = 0; 583 tmp |= (config << UDCCONR_CN_S) & UDCCONR_CN; 584 tmp |= (interface << UDCCONR_IN_S) & UDCCONR_IN; 585 tmp |= (alternate << UDCCONR_AISN_S) & UDCCONR_AISN; 586 tmp |= (ep_num << UDCCONR_EN_S) & UDCCONR_EN; 587 tmp |= (ep_type << UDCCONR_ET_S) & UDCCONR_ET; 588 tmp |= ep_isout ? 0 : UDCCONR_ED; 589 tmp |= (ep_size << UDCCONR_MPS_S) & UDCCONR_MPS; 590 tmp |= UDCCONR_EE; 591 592 UDCCN(ep_num) = tmp; 593 594 usbdbg("UDCCR%c = %x", 'A' + ep_num-1, UDCCN(ep_num)); 595 usbdbg("UDCCSR%c = %x", 'A' + ep_num-1, UDCCSN(ep_num)); 596 } 597 598 #define CONFIG_USB_DEV_PULLUP_GPIO 87 599 600 /* Connect the USB device to the bus */ 601 void udc_connect(void) 602 { 603 usbdbg("UDC connect"); 604 605 /* Turn on the USB connection by enabling the pullup resistor */ 606 set_GPIO_mode(CONFIG_USB_DEV_PULLUP_GPIO | GPIO_OUT); 607 GPSR(CONFIG_USB_DEV_PULLUP_GPIO) = GPIO_bit(CONFIG_USB_DEV_PULLUP_GPIO); 608 } 609 610 /* Disconnect the USB device to the bus */ 611 void udc_disconnect(void) 612 { 613 usbdbg("UDC disconnect"); 614 615 /* Turn off the USB connection by disabling the pullup resistor */ 616 GPCR(CONFIG_USB_DEV_PULLUP_GPIO) = GPIO_bit(CONFIG_USB_DEV_PULLUP_GPIO); 617 } 618 619 /* Switch on the UDC */ 620 void udc_enable(struct usb_device_instance *device) 621 { 622 623 ep0state = EP0_IDLE; 624 CKEN |= CKEN11_USB; 625 626 /* enable endpoint 0, A, B's Packet Complete Interrupt. */ 627 UDCICR0 = 0x0000003f; 628 UDCICR1 = 0xa8000000; 629 630 /* clear the interrupt status/control registers */ 631 UDCISR0 = 0xffffffff; 632 UDCISR1 = 0xffffffff; 633 634 /* set UDC-enable */ 635 udc_set_mask_UDCCR(UDCCR_UDE); 636 637 udc_device = device; 638 if (!ep0_urb) 639 ep0_urb = usbd_alloc_urb(udc_device, 640 udc_device->bus->endpoint_array); 641 else 642 usbinfo("ep0_urb %p already allocated", ep0_urb); 643 644 usbdbg("UDC Enabled\n"); 645 } 646 647 /* Need to check this again */ 648 void udc_disable(void) 649 { 650 usbdbg("disable UDC"); 651 652 udc_clear_mask_UDCCR(UDCCR_UDE); 653 654 /* Disable clock for USB device */ 655 CKEN &= ~CKEN11_USB; 656 657 /* Free ep0 URB */ 658 if (ep0_urb) { 659 usbd_dealloc_urb(ep0_urb); 660 ep0_urb = NULL; 661 } 662 663 /* Reset device pointer */ 664 udc_device = NULL; 665 } 666 667 /* Allow udc code to do any additional startup */ 668 void udc_startup_events(struct usb_device_instance *device) 669 { 670 /* The DEVICE_INIT event puts the USB device in the state STATE_INIT */ 671 usbd_device_event_irq(device, DEVICE_INIT, 0); 672 673 /* The DEVICE_CREATE event puts the USB device in the state 674 * STATE_ATTACHED */ 675 usbd_device_event_irq(device, DEVICE_CREATE, 0); 676 677 /* Some USB controller driver implementations signal 678 * DEVICE_HUB_CONFIGURED and DEVICE_RESET events here. 679 * DEVICE_HUB_CONFIGURED causes a transition to the state 680 * STATE_POWERED, and DEVICE_RESET causes a transition to 681 * the state STATE_DEFAULT. 682 */ 683 udc_enable(device); 684 } 685 686 /* Initialize h/w stuff */ 687 int udc_init(void) 688 { 689 udc_device = NULL; 690 usbdbg("PXA27x usbd start"); 691 692 /* Disable the UDC */ 693 udc_clear_mask_UDCCR(UDCCR_UDE); 694 695 /* Disable clock for USB device */ 696 CKEN &= ~CKEN11_USB; 697 698 /* Disable IRQs: we don't use them */ 699 UDCICR0 = UDCICR1 = 0; 700 701 return 0; 702 } 703