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 <usbdevice.h> 30 #include <asm/arch/hardware.h> 31 #include <asm/io.h> 32 #include <usb/pxa27x_udc.h> 33 34 #include "ep0.h" 35 36 /* number of endpoints on this UDC */ 37 #define UDC_MAX_ENDPOINTS 24 38 39 static struct urb *ep0_urb; 40 static struct usb_device_instance *udc_device; 41 static int ep0state = EP0_IDLE; 42 43 #ifdef USBDDBG 44 static void udc_dump_buffer(char *name, u8 *buf, int len) 45 { 46 usbdbg("%s - buf %p, len %d", name, buf, len); 47 print_buffer(0, buf, 1, len, 0); 48 } 49 #else 50 #define udc_dump_buffer(name, buf, len) /* void */ 51 #endif 52 53 static inline void udc_ack_int_UDCCR(int mask) 54 { 55 writel(readl(USIR1) | mask, USIR1); 56 } 57 58 /* 59 * If the endpoint has an active tx_urb, then the next packet of data from the 60 * URB is written to the tx FIFO. 61 * The total amount of data in the urb is given by urb->actual_length. 62 * The maximum amount of data that can be sent in any one packet is given by 63 * endpoint->tx_packetSize. 64 * The number of data bytes from this URB that have already been transmitted 65 * is given by endpoint->sent. 66 * endpoint->last is updated by this routine with the number of data bytes 67 * transmitted in this packet. 68 */ 69 static int udc_write_urb(struct usb_endpoint_instance *endpoint) 70 { 71 struct urb *urb = endpoint->tx_urb; 72 int ep_num = endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK; 73 u32 *data32 = (u32 *) urb->buffer; 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 writel(UDCCSR_PC ,UDCCSN(ep_num)); 102 103 for (i = 0; i < w; i++) 104 writel(data32[endpoint->sent / 4 + i], UDCDN(ep_num)); 105 106 for (i = 0; i < b; i++) 107 writeb(data8[endpoint->sent + w * 4 + i], UDCDN(ep_num)); 108 109 /* Set "Packet Complete" if less data then tx_packetSize */ 110 if (is_short) 111 writel(ep_num ? UDCCSR_SP : UDCCSR0_IPR, UDCCSN(ep_num)); 112 113 /* Wait for data sent */ 114 if (ep_num) { 115 while (!(readl(UDCCSN(ep_num)) & UDCCSR_PC)) { 116 if (timeout-- == 0) 117 return -1; 118 else 119 udelay(1); 120 } 121 } 122 123 endpoint->last = n; 124 125 if (ep_num) { 126 usbd_tx_complete(endpoint); 127 } else { 128 endpoint->sent += n; 129 endpoint->last -= n; 130 } 131 132 if (endpoint->sent >= urb->actual_length) { 133 urb->actual_length = 0; 134 endpoint->sent = 0; 135 endpoint->last = 0; 136 } 137 138 if ((endpoint->sent >= urb->actual_length) && (!ep_num)) { 139 usbdbg("ep0 IN stage done"); 140 if (is_short) 141 ep0state = EP0_IDLE; 142 else 143 ep0state = EP0_XFER_COMPLETE; 144 } 145 146 return 0; 147 } 148 149 static int udc_read_urb(struct usb_endpoint_instance *endpoint) 150 { 151 struct urb *urb = endpoint->rcv_urb; 152 int ep_num = endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK; 153 u32 *data32 = (u32 *) urb->buffer; 154 unsigned int i, n, is_short ; 155 156 usbdbg("read urb on ep %d", ep_num); 157 #if defined(USBDDBG) && defined(USBDPARANOIA) 158 usbdbg("urb: buf %p, buf_len %d, actual_len %d", 159 urb->buffer, urb->buffer_length, urb->actual_length); 160 usbdbg("endpoint: rcv_packetSize %d", 161 endpoint->rcv_packetSize); 162 #endif 163 164 if (readl(UDCCSN(ep_num)) & UDCCSR_BNE) 165 n = readl(UDCBCN(ep_num)) & 0x3ff; 166 else /* zlp */ 167 n = 0; 168 is_short = n != endpoint->rcv_packetSize; 169 170 usbdbg("n %d%s", n, is_short ? "-s" : ""); 171 for (i = 0; i < n; i += 4) 172 data32[urb->actual_length / 4 + i / 4] = readl(UDCDN(ep_num)); 173 174 udc_dump_buffer("urb read", (u8 *) data32, urb->actual_length + n); 175 usbd_rcv_complete(endpoint, n, 0); 176 177 return 0; 178 } 179 180 static int udc_read_urb_ep0(void) 181 { 182 u32 *data32 = (u32 *) ep0_urb->buffer; 183 u8 *data8 = (u8 *) ep0_urb->buffer; 184 unsigned int i, n, w, b; 185 186 usbdbg("read urb on ep 0"); 187 #if defined(USBDDBG) && defined(USBDPARANOIA) 188 usbdbg("urb: buf %p, buf_len %d, actual_len %d", 189 ep0_urb->buffer, ep0_urb->buffer_length, ep0_urb->actual_length); 190 #endif 191 192 n = readl(UDCBCR0); 193 w = n / 4; 194 b = n % 4; 195 196 for (i = 0; i < w; i++) { 197 data32[ep0_urb->actual_length / 4 + i] = readl(UDCDN(0)); 198 /* ep0_urb->actual_length += 4; */ 199 } 200 201 for (i = 0; i < b; i++) { 202 data8[ep0_urb->actual_length + w * 4 + i] = readb(UDCDN(0)); 203 /* ep0_urb->actual_length++; */ 204 } 205 206 ep0_urb->actual_length += n; 207 208 udc_dump_buffer("urb read", (u8 *) data32, ep0_urb->actual_length); 209 210 writel(UDCCSR0_OPC | UDCCSR0_IPR, UDCCSR0); 211 if (ep0_urb->actual_length == ep0_urb->device_request.wLength) 212 return 1; 213 214 return 0; 215 } 216 217 static void udc_handle_ep0(struct usb_endpoint_instance *endpoint) 218 { 219 u32 udccsr0 = readl(UDCCSR0); 220 u32 *data = (u32 *) &ep0_urb->device_request; 221 int i; 222 223 usbdbg("udccsr0 %x", udccsr0); 224 225 /* Clear stall status */ 226 if (udccsr0 & UDCCSR0_SST) { 227 usberr("clear stall status"); 228 writel(UDCCSR0_SST, UDCCSR0); 229 ep0state = EP0_IDLE; 230 } 231 232 /* previous request unfinished? non-error iff back-to-back ... */ 233 if ((udccsr0 & UDCCSR0_SA) != 0 && ep0state != EP0_IDLE) 234 ep0state = EP0_IDLE; 235 236 switch (ep0state) { 237 238 case EP0_IDLE: 239 udccsr0 = readl(UDCCSR0); 240 /* Start control request? */ 241 if ((udccsr0 & (UDCCSR0_OPC | UDCCSR0_SA | UDCCSR0_RNE)) 242 == (UDCCSR0_OPC | UDCCSR0_SA | UDCCSR0_RNE)) { 243 244 /* Read SETUP packet. 245 * SETUP packet size is 8 bytes (aka 2 words) 246 */ 247 usbdbg("try reading SETUP packet"); 248 for (i = 0; i < 2; i++) { 249 if ((readl(UDCCSR0) & UDCCSR0_RNE) == 0) { 250 usberr("setup packet too short:%d", i); 251 goto stall; 252 } 253 data[i] = readl(UDCDR0); 254 } 255 256 writel(readl(UDCCSR0) | UDCCSR0_OPC | UDCCSR0_SA, UDCCSR0); 257 if ((readl(UDCCSR0) & UDCCSR0_RNE) != 0) { 258 usberr("setup packet too long"); 259 goto stall; 260 } 261 262 udc_dump_buffer("ep0 setup read", (u8 *) data, 8); 263 264 if (ep0_urb->device_request.wLength == 0) { 265 usbdbg("Zero Data control Packet\n"); 266 if (ep0_recv_setup(ep0_urb)) { 267 usberr("Invalid Setup Packet\n"); 268 udc_dump_buffer("ep0 setup read", 269 (u8 *)data, 8); 270 goto stall; 271 } 272 writel(UDCCSR0_IPR, UDCCSR0); 273 ep0state = EP0_IDLE; 274 } else { 275 /* Check direction */ 276 if ((ep0_urb->device_request.bmRequestType & 277 USB_REQ_DIRECTION_MASK) 278 == USB_REQ_HOST2DEVICE) { 279 ep0state = EP0_OUT_DATA; 280 ep0_urb->buffer = 281 (u8 *)ep0_urb->buffer_data; 282 ep0_urb->buffer_length = 283 sizeof(ep0_urb->buffer_data); 284 ep0_urb->actual_length = 0; 285 writel(UDCCSR0_IPR, UDCCSR0); 286 } else { 287 /* The ep0_recv_setup function has 288 * already placed our response packet 289 * data in ep0_urb->buffer and the 290 * packet length in 291 * ep0_urb->actual_length. 292 */ 293 if (ep0_recv_setup(ep0_urb)) { 294 stall: 295 usberr("Invalid setup packet"); 296 udc_dump_buffer("ep0 setup read" 297 , (u8 *) data, 8); 298 ep0state = EP0_IDLE; 299 300 writel(UDCCSR0_SA | 301 UDCCSR0_OPC | UDCCSR0_FST | 302 UDCCS0_FTF, UDCCSR0); 303 304 return; 305 } 306 307 endpoint->tx_urb = ep0_urb; 308 endpoint->sent = 0; 309 usbdbg("EP0_IN_DATA"); 310 ep0state = EP0_IN_DATA; 311 if (udc_write_urb(endpoint) < 0) 312 goto stall; 313 314 } 315 } 316 return; 317 } else if ((udccsr0 & (UDCCSR0_OPC | UDCCSR0_SA)) 318 == (UDCCSR0_OPC|UDCCSR0_SA)) { 319 usberr("Setup Active but no data. Stalling ....\n"); 320 goto stall; 321 } else { 322 usbdbg("random early IRQs"); 323 /* Some random early IRQs: 324 * - we acked FST 325 * - IPR cleared 326 * - OPC got set, without SA (likely status stage) 327 */ 328 writel(udccsr0 & (UDCCSR0_SA | UDCCSR0_OPC), UDCCSR0); 329 } 330 break; 331 332 case EP0_OUT_DATA: 333 334 if ((udccsr0 & UDCCSR0_OPC) && !(udccsr0 & UDCCSR0_SA)) { 335 if (udc_read_urb_ep0()) { 336 read_complete: 337 ep0state = EP0_IDLE; 338 if (ep0_recv_setup(ep0_urb)) { 339 /* Not a setup packet, stall next 340 * EP0 transaction 341 */ 342 udc_dump_buffer("ep0 setup read", 343 (u8 *) data, 8); 344 usberr("can't parse setup packet\n"); 345 goto stall; 346 } 347 } 348 } else if (!(udccsr0 & UDCCSR0_OPC) && 349 !(udccsr0 & UDCCSR0_IPR)) { 350 if (ep0_urb->device_request.wLength == 351 ep0_urb->actual_length) 352 goto read_complete; 353 354 usberr("Premature Status\n"); 355 ep0state = EP0_IDLE; 356 } 357 break; 358 359 case EP0_IN_DATA: 360 /* GET_DESCRIPTOR etc */ 361 if (udccsr0 & UDCCSR0_OPC) { 362 writel(UDCCSR0_OPC | UDCCSR0_FTF, UDCCSR0); 363 usberr("ep0in premature status"); 364 ep0state = EP0_IDLE; 365 } else { 366 /* irq was IPR clearing */ 367 if (udc_write_urb(endpoint) < 0) { 368 usberr("ep0_write_error\n"); 369 goto stall; 370 } 371 } 372 break; 373 374 case EP0_XFER_COMPLETE: 375 writel(UDCCSR0_IPR, UDCCSR0); 376 ep0state = EP0_IDLE; 377 break; 378 379 default: 380 usbdbg("Default\n"); 381 } 382 writel(USIR0_IR0, USIR0); 383 } 384 385 static void udc_handle_ep(struct usb_endpoint_instance *endpoint) 386 { 387 int ep_addr = endpoint->endpoint_address; 388 int ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK; 389 int ep_isout = (ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT; 390 391 u32 flags = readl(UDCCSN(ep_num)) & (UDCCSR_SST | UDCCSR_TRN); 392 if (flags) 393 writel(flags, UDCCSN(ep_num)); 394 395 if (ep_isout) 396 udc_read_urb(endpoint); 397 else 398 udc_write_urb(endpoint); 399 400 writel(UDCCSR_PC, UDCCSN(ep_num)); 401 } 402 403 static void udc_state_changed(void) 404 { 405 int config, interface, alternate; 406 407 writel(readl(UDCCR) | UDCCR_SMAC, UDCCR); 408 409 config = (readl(UDCCR) & UDCCR_ACN) >> UDCCR_ACN_S; 410 interface = (readl(UDCCR) & UDCCR_AIN) >> UDCCR_AIN_S; 411 alternate = (readl(UDCCR) & UDCCR_AAISN) >> UDCCR_AAISN_S; 412 413 usbdbg("New UDC settings are: conf %d - inter %d - alter %d", 414 config, interface, alternate); 415 416 usbd_device_event_irq(udc_device, DEVICE_CONFIGURED, 0); 417 writel(UDCISR1_IRCC, UDCISR1); 418 } 419 420 void udc_irq(void) 421 { 422 int handled; 423 struct usb_endpoint_instance *endpoint; 424 int ep_num, i; 425 u32 udcisr0; 426 427 do { 428 handled = 0; 429 /* Suspend Interrupt Request */ 430 if (readl(USIR1) & UDCCR_SUSIR) { 431 usbdbg("Suspend\n"); 432 udc_ack_int_UDCCR(UDCCR_SUSIR); 433 handled = 1; 434 ep0state = EP0_IDLE; 435 } 436 437 /* Resume Interrupt Request */ 438 if (readl(USIR1) & UDCCR_RESIR) { 439 udc_ack_int_UDCCR(UDCCR_RESIR); 440 handled = 1; 441 usbdbg("USB resume\n"); 442 } 443 444 if (readl(USIR1) & (1<<31)) { 445 handled = 1; 446 udc_state_changed(); 447 } 448 449 /* Reset Interrupt Request */ 450 if (readl(USIR1) & UDCCR_RSTIR) { 451 udc_ack_int_UDCCR(UDCCR_RSTIR); 452 handled = 1; 453 usbdbg("Reset\n"); 454 usbd_device_event_irq(udc_device, DEVICE_RESET, 0); 455 } else { 456 if (readl(USIR0)) 457 usbdbg("UISR0: %x \n", readl(USIR0)); 458 459 if (readl(USIR0) & 0x2) 460 writel(0x2, USIR0); 461 462 /* Control traffic */ 463 if (readl(USIR0) & USIR0_IR0) { 464 handled = 1; 465 writel(USIR0_IR0, USIR0); 466 udc_handle_ep0(udc_device->bus->endpoint_array); 467 } 468 469 endpoint = udc_device->bus->endpoint_array; 470 for (i = 0; i < udc_device->bus->max_endpoints; i++) { 471 ep_num = (endpoint[i].endpoint_address) & 472 USB_ENDPOINT_NUMBER_MASK; 473 if (!ep_num) 474 continue; 475 udcisr0 = readl(UDCISR0); 476 if (udcisr0 & 477 UDCISR_INT(ep_num, UDC_INT_PACKETCMP)) { 478 writel(UDCISR_INT(ep_num, UDC_INT_PACKETCMP), 479 UDCISR0); 480 udc_handle_ep(&endpoint[i]); 481 } 482 } 483 } 484 485 } while (handled); 486 } 487 488 /* The UDCCR reg contains mask and interrupt status bits, 489 * so using '|=' isn't safe as it may ack an interrupt. 490 */ 491 #define UDCCR_OEN (1 << 31) /* On-the-Go Enable */ 492 #define UDCCR_MASK_BITS (UDCCR_OEN | UDCCR_UDE) 493 494 static inline void udc_set_mask_UDCCR(int mask) 495 { 496 writel((readl(UDCCR) & UDCCR_MASK_BITS) | (mask & UDCCR_MASK_BITS), UDCCR); 497 } 498 499 static inline void udc_clear_mask_UDCCR(int mask) 500 { 501 writel((readl(UDCCR) & UDCCR_MASK_BITS) & ~(mask & UDCCR_MASK_BITS), UDCCR); 502 } 503 504 static void pio_irq_enable(int ep_num) 505 { 506 if (ep_num < 16) 507 writel(readl(UDCICR0) | 3 << (ep_num * 2), UDCICR0); 508 else { 509 ep_num -= 16; 510 writel(readl(UDCICR1) | 3 << (ep_num * 2), UDCICR1); 511 } 512 } 513 514 /* 515 * udc_set_nak 516 * 517 * Allow upper layers to signal lower layers should not accept more RX data 518 */ 519 void udc_set_nak(int ep_num) 520 { 521 /* TODO */ 522 } 523 524 /* 525 * udc_unset_nak 526 * 527 * Suspend sending of NAK tokens for DATA OUT tokens on a given endpoint. 528 * Switch off NAKing on this endpoint to accept more data output from host. 529 */ 530 void udc_unset_nak(int ep_num) 531 { 532 /* TODO */ 533 } 534 535 int udc_endpoint_write(struct usb_endpoint_instance *endpoint) 536 { 537 return udc_write_urb(endpoint); 538 } 539 540 /* Associate a physical endpoint with endpoint instance */ 541 void udc_setup_ep(struct usb_device_instance *device, unsigned int id, 542 struct usb_endpoint_instance *endpoint) 543 { 544 int ep_num, ep_addr, ep_isout, ep_type, ep_size; 545 int config, interface, alternate; 546 u32 tmp; 547 548 usbdbg("setting up endpoint id %d", id); 549 550 if (!endpoint) { 551 usberr("endpoint void!"); 552 return; 553 } 554 555 ep_num = endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK; 556 if (ep_num >= UDC_MAX_ENDPOINTS) { 557 usberr("unable to setup ep %d!", ep_num); 558 return; 559 } 560 561 pio_irq_enable(ep_num); 562 if (ep_num == 0) { 563 /* Done for ep0 */ 564 return; 565 } 566 567 config = 1; 568 interface = 0; 569 alternate = 0; 570 571 usbdbg("config %d - interface %d - alternate %d", 572 config, interface, alternate); 573 574 ep_addr = endpoint->endpoint_address; 575 ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK; 576 ep_isout = (ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT; 577 ep_type = ep_isout ? endpoint->rcv_attributes : endpoint->tx_attributes; 578 ep_size = ep_isout ? endpoint->rcv_packetSize : endpoint->tx_packetSize; 579 580 usbdbg("addr %x, num %d, dir %s, type %s, packet size %d", 581 ep_addr, ep_num, 582 ep_isout ? "out" : "in", 583 ep_type == USB_ENDPOINT_XFER_ISOC ? "isoc" : 584 ep_type == USB_ENDPOINT_XFER_BULK ? "bulk" : 585 ep_type == USB_ENDPOINT_XFER_INT ? "int" : "???", 586 ep_size 587 ); 588 589 /* Configure UDCCRx */ 590 tmp = 0; 591 tmp |= (config << UDCCONR_CN_S) & UDCCONR_CN; 592 tmp |= (interface << UDCCONR_IN_S) & UDCCONR_IN; 593 tmp |= (alternate << UDCCONR_AISN_S) & UDCCONR_AISN; 594 tmp |= (ep_num << UDCCONR_EN_S) & UDCCONR_EN; 595 tmp |= (ep_type << UDCCONR_ET_S) & UDCCONR_ET; 596 tmp |= ep_isout ? 0 : UDCCONR_ED; 597 tmp |= (ep_size << UDCCONR_MPS_S) & UDCCONR_MPS; 598 tmp |= UDCCONR_EE; 599 600 writel(tmp, UDCCN(ep_num)); 601 602 usbdbg("UDCCR%c = %x", 'A' + ep_num-1, readl(UDCCN(ep_num))); 603 usbdbg("UDCCSR%c = %x", 'A' + ep_num-1, readl(UDCCSN(ep_num))); 604 } 605 606 /* Connect the USB device to the bus */ 607 void udc_connect(void) 608 { 609 usbdbg("UDC connect"); 610 611 #ifdef CONFIG_USB_DEV_PULLUP_GPIO 612 /* Turn on the USB connection by enabling the pullup resistor */ 613 set_GPIO_mode(CONFIG_USB_DEV_PULLUP_GPIO | GPIO_OUT); 614 writel(GPIO_bit(CONFIG_USB_DEV_PULLUP_GPIO), GPSR(CONFIG_USB_DEV_PULLUP_GPIO)); 615 #else 616 /* Host port 2 transceiver D+ pull up enable */ 617 writel(readl(UP2OCR) | UP2OCR_DPPUE, UP2OCR); 618 #endif 619 } 620 621 /* Disconnect the USB device to the bus */ 622 void udc_disconnect(void) 623 { 624 usbdbg("UDC disconnect"); 625 626 #ifdef CONFIG_USB_DEV_PULLUP_GPIO 627 /* Turn off the USB connection by disabling the pullup resistor */ 628 writel(GPIO_bit(CONFIG_USB_DEV_PULLUP_GPIO), GPCR(CONFIG_USB_DEV_PULLUP_GPIO)); 629 #else 630 /* Host port 2 transceiver D+ pull up disable */ 631 writel(readl(UP2OCR) & ~UP2OCR_DPPUE, UP2OCR); 632 #endif 633 } 634 635 /* Switch on the UDC */ 636 void udc_enable(struct usb_device_instance *device) 637 { 638 639 ep0state = EP0_IDLE; 640 641 /* enable endpoint 0, A, B's Packet Complete Interrupt. */ 642 writel(0xffffffff, UDCICR0); 643 writel(0xa8000000, UDCICR1); 644 645 /* clear the interrupt status/control registers */ 646 writel(0xffffffff, UDCISR0); 647 writel(0xffffffff, UDCISR1); 648 649 /* set UDC-enable */ 650 udc_set_mask_UDCCR(UDCCR_UDE); 651 652 udc_device = device; 653 if (!ep0_urb) 654 ep0_urb = usbd_alloc_urb(udc_device, 655 udc_device->bus->endpoint_array); 656 else 657 usbinfo("ep0_urb %p already allocated", ep0_urb); 658 659 usbdbg("UDC Enabled\n"); 660 } 661 662 /* Need to check this again */ 663 void udc_disable(void) 664 { 665 usbdbg("disable UDC"); 666 667 udc_clear_mask_UDCCR(UDCCR_UDE); 668 669 /* Disable clock for USB device */ 670 writel(readl(CKEN) & ~CKEN11_USB, CKEN); 671 672 /* Free ep0 URB */ 673 if (ep0_urb) { 674 usbd_dealloc_urb(ep0_urb); 675 ep0_urb = NULL; 676 } 677 678 /* Reset device pointer */ 679 udc_device = NULL; 680 } 681 682 /* Allow udc code to do any additional startup */ 683 void udc_startup_events(struct usb_device_instance *device) 684 { 685 /* The DEVICE_INIT event puts the USB device in the state STATE_INIT */ 686 usbd_device_event_irq(device, DEVICE_INIT, 0); 687 688 /* The DEVICE_CREATE event puts the USB device in the state 689 * STATE_ATTACHED */ 690 usbd_device_event_irq(device, DEVICE_CREATE, 0); 691 692 /* Some USB controller driver implementations signal 693 * DEVICE_HUB_CONFIGURED and DEVICE_RESET events here. 694 * DEVICE_HUB_CONFIGURED causes a transition to the state 695 * STATE_POWERED, and DEVICE_RESET causes a transition to 696 * the state STATE_DEFAULT. 697 */ 698 udc_enable(device); 699 } 700 701 /* Initialize h/w stuff */ 702 int udc_init(void) 703 { 704 udc_device = NULL; 705 usbdbg("PXA27x usbd start"); 706 707 /* Enable clock for USB device */ 708 writel(readl(CKEN) | CKEN11_USB, CKEN); 709 710 /* Disable the UDC */ 711 udc_clear_mask_UDCCR(UDCCR_UDE); 712 713 /* Disable IRQs: we don't use them */ 714 writel(0, UDCICR0); 715 writel(0, UDCICR1); 716 717 return 0; 718 } 719