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