1 /*- 2 * Copyright (c) 2007-2008, Juniper Networks, Inc. 3 * Copyright (c) 2008, Excito Elektronik i Skåne AB 4 * Copyright (c) 2008, Michael Trimarchi <trimarchimichael@yahoo.it> 5 * 6 * All rights reserved. 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 version 2 of 11 * the License. 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 #include <common.h> 24 #include <errno.h> 25 #include <asm/byteorder.h> 26 #include <asm/unaligned.h> 27 #include <usb.h> 28 #include <asm/io.h> 29 #include <malloc.h> 30 #include <watchdog.h> 31 #include <linux/compiler.h> 32 33 #include "ehci.h" 34 35 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT 36 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1 37 #endif 38 39 /* 40 * EHCI spec page 20 says that the HC may take up to 16 uFrames (= 4ms) to halt. 41 * Let's time out after 8 to have a little safety margin on top of that. 42 */ 43 #define HCHALT_TIMEOUT (8 * 1000) 44 45 static struct ehci_ctrl ehcic[CONFIG_USB_MAX_CONTROLLER_COUNT]; 46 47 #define ALIGN_END_ADDR(type, ptr, size) \ 48 ((uint32_t)(ptr) + roundup((size) * sizeof(type), USB_DMA_MINALIGN)) 49 50 static struct descriptor { 51 struct usb_hub_descriptor hub; 52 struct usb_device_descriptor device; 53 struct usb_linux_config_descriptor config; 54 struct usb_linux_interface_descriptor interface; 55 struct usb_endpoint_descriptor endpoint; 56 } __attribute__ ((packed)) descriptor = { 57 { 58 0x8, /* bDescLength */ 59 0x29, /* bDescriptorType: hub descriptor */ 60 2, /* bNrPorts -- runtime modified */ 61 0, /* wHubCharacteristics */ 62 10, /* bPwrOn2PwrGood */ 63 0, /* bHubCntrCurrent */ 64 {}, /* Device removable */ 65 {} /* at most 7 ports! XXX */ 66 }, 67 { 68 0x12, /* bLength */ 69 1, /* bDescriptorType: UDESC_DEVICE */ 70 cpu_to_le16(0x0200), /* bcdUSB: v2.0 */ 71 9, /* bDeviceClass: UDCLASS_HUB */ 72 0, /* bDeviceSubClass: UDSUBCLASS_HUB */ 73 1, /* bDeviceProtocol: UDPROTO_HSHUBSTT */ 74 64, /* bMaxPacketSize: 64 bytes */ 75 0x0000, /* idVendor */ 76 0x0000, /* idProduct */ 77 cpu_to_le16(0x0100), /* bcdDevice */ 78 1, /* iManufacturer */ 79 2, /* iProduct */ 80 0, /* iSerialNumber */ 81 1 /* bNumConfigurations: 1 */ 82 }, 83 { 84 0x9, 85 2, /* bDescriptorType: UDESC_CONFIG */ 86 cpu_to_le16(0x19), 87 1, /* bNumInterface */ 88 1, /* bConfigurationValue */ 89 0, /* iConfiguration */ 90 0x40, /* bmAttributes: UC_SELF_POWER */ 91 0 /* bMaxPower */ 92 }, 93 { 94 0x9, /* bLength */ 95 4, /* bDescriptorType: UDESC_INTERFACE */ 96 0, /* bInterfaceNumber */ 97 0, /* bAlternateSetting */ 98 1, /* bNumEndpoints */ 99 9, /* bInterfaceClass: UICLASS_HUB */ 100 0, /* bInterfaceSubClass: UISUBCLASS_HUB */ 101 0, /* bInterfaceProtocol: UIPROTO_HSHUBSTT */ 102 0 /* iInterface */ 103 }, 104 { 105 0x7, /* bLength */ 106 5, /* bDescriptorType: UDESC_ENDPOINT */ 107 0x81, /* bEndpointAddress: 108 * UE_DIR_IN | EHCI_INTR_ENDPT 109 */ 110 3, /* bmAttributes: UE_INTERRUPT */ 111 8, /* wMaxPacketSize */ 112 255 /* bInterval */ 113 }, 114 }; 115 116 #if defined(CONFIG_EHCI_IS_TDI) 117 #define ehci_is_TDI() (1) 118 #else 119 #define ehci_is_TDI() (0) 120 #endif 121 122 __weak int ehci_get_port_speed(struct ehci_hcor *hcor, uint32_t reg) 123 { 124 return PORTSC_PSPD(reg); 125 } 126 127 __weak void ehci_set_usbmode(int index) 128 { 129 uint32_t tmp; 130 uint32_t *reg_ptr; 131 132 reg_ptr = (uint32_t *)((u8 *)&ehcic[index].hcor->or_usbcmd + USBMODE); 133 tmp = ehci_readl(reg_ptr); 134 tmp |= USBMODE_CM_HC; 135 #if defined(CONFIG_EHCI_MMIO_BIG_ENDIAN) 136 tmp |= USBMODE_BE; 137 #endif 138 ehci_writel(reg_ptr, tmp); 139 } 140 141 __weak void ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg) 142 { 143 mdelay(50); 144 } 145 146 static int handshake(uint32_t *ptr, uint32_t mask, uint32_t done, int usec) 147 { 148 uint32_t result; 149 do { 150 result = ehci_readl(ptr); 151 udelay(5); 152 if (result == ~(uint32_t)0) 153 return -1; 154 result &= mask; 155 if (result == done) 156 return 0; 157 usec--; 158 } while (usec > 0); 159 return -1; 160 } 161 162 static int ehci_reset(int index) 163 { 164 uint32_t cmd; 165 int ret = 0; 166 167 cmd = ehci_readl(&ehcic[index].hcor->or_usbcmd); 168 cmd = (cmd & ~CMD_RUN) | CMD_RESET; 169 ehci_writel(&ehcic[index].hcor->or_usbcmd, cmd); 170 ret = handshake((uint32_t *)&ehcic[index].hcor->or_usbcmd, 171 CMD_RESET, 0, 250 * 1000); 172 if (ret < 0) { 173 printf("EHCI fail to reset\n"); 174 goto out; 175 } 176 177 if (ehci_is_TDI()) 178 ehci_set_usbmode(index); 179 180 #ifdef CONFIG_USB_EHCI_TXFIFO_THRESH 181 cmd = ehci_readl(&ehcic[index].hcor->or_txfilltuning); 182 cmd &= ~TXFIFO_THRESH_MASK; 183 cmd |= TXFIFO_THRESH(CONFIG_USB_EHCI_TXFIFO_THRESH); 184 ehci_writel(&ehcic[index].hcor->or_txfilltuning, cmd); 185 #endif 186 out: 187 return ret; 188 } 189 190 static int ehci_shutdown(struct ehci_ctrl *ctrl) 191 { 192 int i, ret = 0; 193 uint32_t cmd, reg; 194 195 if (!ctrl || !ctrl->hcor) 196 return -EINVAL; 197 198 cmd = ehci_readl(&ctrl->hcor->or_usbcmd); 199 cmd &= ~(CMD_PSE | CMD_ASE); 200 ehci_writel(&ctrl->hcor->or_usbcmd, cmd); 201 ret = handshake(&ctrl->hcor->or_usbsts, STS_ASS | STS_PSS, 0, 202 100 * 1000); 203 204 if (!ret) { 205 for (i = 0; i < CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS; i++) { 206 reg = ehci_readl(&ctrl->hcor->or_portsc[i]); 207 reg |= EHCI_PS_SUSP; 208 ehci_writel(&ctrl->hcor->or_portsc[i], reg); 209 } 210 211 cmd &= ~CMD_RUN; 212 ehci_writel(&ctrl->hcor->or_usbcmd, cmd); 213 ret = handshake(&ctrl->hcor->or_usbsts, STS_HALT, STS_HALT, 214 HCHALT_TIMEOUT); 215 } 216 217 if (ret) 218 puts("EHCI failed to shut down host controller.\n"); 219 220 return ret; 221 } 222 223 static int ehci_td_buffer(struct qTD *td, void *buf, size_t sz) 224 { 225 uint32_t delta, next; 226 uint32_t addr = (uint32_t)buf; 227 int idx; 228 229 if (addr != ALIGN(addr, ARCH_DMA_MINALIGN)) 230 debug("EHCI-HCD: Misaligned buffer address (%p)\n", buf); 231 232 flush_dcache_range(addr, ALIGN(addr + sz, ARCH_DMA_MINALIGN)); 233 234 idx = 0; 235 while (idx < QT_BUFFER_CNT) { 236 td->qt_buffer[idx] = cpu_to_hc32(addr); 237 td->qt_buffer_hi[idx] = 0; 238 next = (addr + EHCI_PAGE_SIZE) & ~(EHCI_PAGE_SIZE - 1); 239 delta = next - addr; 240 if (delta >= sz) 241 break; 242 sz -= delta; 243 addr = next; 244 idx++; 245 } 246 247 if (idx == QT_BUFFER_CNT) { 248 printf("out of buffer pointers (%u bytes left)\n", sz); 249 return -1; 250 } 251 252 return 0; 253 } 254 255 static inline u8 ehci_encode_speed(enum usb_device_speed speed) 256 { 257 #define QH_HIGH_SPEED 2 258 #define QH_FULL_SPEED 0 259 #define QH_LOW_SPEED 1 260 if (speed == USB_SPEED_HIGH) 261 return QH_HIGH_SPEED; 262 if (speed == USB_SPEED_LOW) 263 return QH_LOW_SPEED; 264 return QH_FULL_SPEED; 265 } 266 267 static void ehci_update_endpt2_dev_n_port(struct usb_device *dev, 268 struct QH *qh) 269 { 270 struct usb_device *ttdev; 271 272 if (dev->speed != USB_SPEED_LOW && dev->speed != USB_SPEED_FULL) 273 return; 274 275 /* 276 * For full / low speed devices we need to get the devnum and portnr of 277 * the tt, so of the first upstream usb-2 hub, there may be usb-1 hubs 278 * in the tree before that one! 279 */ 280 ttdev = dev; 281 while (ttdev->parent && ttdev->parent->speed != USB_SPEED_HIGH) 282 ttdev = ttdev->parent; 283 if (!ttdev->parent) 284 return; 285 286 qh->qh_endpt2 |= cpu_to_hc32(QH_ENDPT2_PORTNUM(ttdev->portnr) | 287 QH_ENDPT2_HUBADDR(ttdev->parent->devnum)); 288 } 289 290 static int 291 ehci_submit_async(struct usb_device *dev, unsigned long pipe, void *buffer, 292 int length, struct devrequest *req) 293 { 294 ALLOC_ALIGN_BUFFER(struct QH, qh, 1, USB_DMA_MINALIGN); 295 struct qTD *qtd; 296 int qtd_count = 0; 297 int qtd_counter = 0; 298 volatile struct qTD *vtd; 299 unsigned long ts; 300 uint32_t *tdp; 301 uint32_t endpt, maxpacket, token, usbsts; 302 uint32_t c, toggle; 303 uint32_t cmd; 304 int timeout; 305 int ret = 0; 306 struct ehci_ctrl *ctrl = dev->controller; 307 308 debug("dev=%p, pipe=%lx, buffer=%p, length=%d, req=%p\n", dev, pipe, 309 buffer, length, req); 310 if (req != NULL) 311 debug("req=%u (%#x), type=%u (%#x), value=%u (%#x), index=%u\n", 312 req->request, req->request, 313 req->requesttype, req->requesttype, 314 le16_to_cpu(req->value), le16_to_cpu(req->value), 315 le16_to_cpu(req->index)); 316 317 #define PKT_ALIGN 512 318 /* 319 * The USB transfer is split into qTD transfers. Eeach qTD transfer is 320 * described by a transfer descriptor (the qTD). The qTDs form a linked 321 * list with a queue head (QH). 322 * 323 * Each qTD transfer starts with a new USB packet, i.e. a packet cannot 324 * have its beginning in a qTD transfer and its end in the following 325 * one, so the qTD transfer lengths have to be chosen accordingly. 326 * 327 * Each qTD transfer uses up to QT_BUFFER_CNT data buffers, mapped to 328 * single pages. The first data buffer can start at any offset within a 329 * page (not considering the cache-line alignment issues), while the 330 * following buffers must be page-aligned. There is no alignment 331 * constraint on the size of a qTD transfer. 332 */ 333 if (req != NULL) 334 /* 1 qTD will be needed for SETUP, and 1 for ACK. */ 335 qtd_count += 1 + 1; 336 if (length > 0 || req == NULL) { 337 /* 338 * Determine the qTD transfer size that will be used for the 339 * data payload (not considering the first qTD transfer, which 340 * may be longer or shorter, and the final one, which may be 341 * shorter). 342 * 343 * In order to keep each packet within a qTD transfer, the qTD 344 * transfer size is aligned to PKT_ALIGN, which is a multiple of 345 * wMaxPacketSize (except in some cases for interrupt transfers, 346 * see comment in submit_int_msg()). 347 * 348 * By default, i.e. if the input buffer is aligned to PKT_ALIGN, 349 * QT_BUFFER_CNT full pages will be used. 350 */ 351 int xfr_sz = QT_BUFFER_CNT; 352 /* 353 * However, if the input buffer is not aligned to PKT_ALIGN, the 354 * qTD transfer size will be one page shorter, and the first qTD 355 * data buffer of each transfer will be page-unaligned. 356 */ 357 if ((uint32_t)buffer & (PKT_ALIGN - 1)) 358 xfr_sz--; 359 /* Convert the qTD transfer size to bytes. */ 360 xfr_sz *= EHCI_PAGE_SIZE; 361 /* 362 * Approximate by excess the number of qTDs that will be 363 * required for the data payload. The exact formula is way more 364 * complicated and saves at most 2 qTDs, i.e. a total of 128 365 * bytes. 366 */ 367 qtd_count += 2 + length / xfr_sz; 368 } 369 /* 370 * Threshold value based on the worst-case total size of the allocated qTDs for 371 * a mass-storage transfer of 65535 blocks of 512 bytes. 372 */ 373 #if CONFIG_SYS_MALLOC_LEN <= 64 + 128 * 1024 374 #warning CONFIG_SYS_MALLOC_LEN may be too small for EHCI 375 #endif 376 qtd = memalign(USB_DMA_MINALIGN, qtd_count * sizeof(struct qTD)); 377 if (qtd == NULL) { 378 printf("unable to allocate TDs\n"); 379 return -1; 380 } 381 382 memset(qh, 0, sizeof(struct QH)); 383 memset(qtd, 0, qtd_count * sizeof(*qtd)); 384 385 toggle = usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe)); 386 387 /* 388 * Setup QH (3.6 in ehci-r10.pdf) 389 * 390 * qh_link ................. 03-00 H 391 * qh_endpt1 ............... 07-04 H 392 * qh_endpt2 ............... 0B-08 H 393 * - qh_curtd 394 * qh_overlay.qt_next ...... 13-10 H 395 * - qh_overlay.qt_altnext 396 */ 397 qh->qh_link = cpu_to_hc32((uint32_t)&ctrl->qh_list | QH_LINK_TYPE_QH); 398 c = (dev->speed != USB_SPEED_HIGH) && !usb_pipeendpoint(pipe); 399 maxpacket = usb_maxpacket(dev, pipe); 400 endpt = QH_ENDPT1_RL(8) | QH_ENDPT1_C(c) | 401 QH_ENDPT1_MAXPKTLEN(maxpacket) | QH_ENDPT1_H(0) | 402 QH_ENDPT1_DTC(QH_ENDPT1_DTC_DT_FROM_QTD) | 403 QH_ENDPT1_EPS(ehci_encode_speed(dev->speed)) | 404 QH_ENDPT1_ENDPT(usb_pipeendpoint(pipe)) | QH_ENDPT1_I(0) | 405 QH_ENDPT1_DEVADDR(usb_pipedevice(pipe)); 406 qh->qh_endpt1 = cpu_to_hc32(endpt); 407 endpt = QH_ENDPT2_MULT(1) | QH_ENDPT2_UFCMASK(0) | QH_ENDPT2_UFSMASK(0); 408 qh->qh_endpt2 = cpu_to_hc32(endpt); 409 ehci_update_endpt2_dev_n_port(dev, qh); 410 qh->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE); 411 qh->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE); 412 413 tdp = &qh->qh_overlay.qt_next; 414 415 if (req != NULL) { 416 /* 417 * Setup request qTD (3.5 in ehci-r10.pdf) 418 * 419 * qt_next ................ 03-00 H 420 * qt_altnext ............. 07-04 H 421 * qt_token ............... 0B-08 H 422 * 423 * [ buffer, buffer_hi ] loaded with "req". 424 */ 425 qtd[qtd_counter].qt_next = cpu_to_hc32(QT_NEXT_TERMINATE); 426 qtd[qtd_counter].qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE); 427 token = QT_TOKEN_DT(0) | QT_TOKEN_TOTALBYTES(sizeof(*req)) | 428 QT_TOKEN_IOC(0) | QT_TOKEN_CPAGE(0) | QT_TOKEN_CERR(3) | 429 QT_TOKEN_PID(QT_TOKEN_PID_SETUP) | 430 QT_TOKEN_STATUS(QT_TOKEN_STATUS_ACTIVE); 431 qtd[qtd_counter].qt_token = cpu_to_hc32(token); 432 if (ehci_td_buffer(&qtd[qtd_counter], req, sizeof(*req))) { 433 printf("unable to construct SETUP TD\n"); 434 goto fail; 435 } 436 /* Update previous qTD! */ 437 *tdp = cpu_to_hc32((uint32_t)&qtd[qtd_counter]); 438 tdp = &qtd[qtd_counter++].qt_next; 439 toggle = 1; 440 } 441 442 if (length > 0 || req == NULL) { 443 uint8_t *buf_ptr = buffer; 444 int left_length = length; 445 446 do { 447 /* 448 * Determine the size of this qTD transfer. By default, 449 * QT_BUFFER_CNT full pages can be used. 450 */ 451 int xfr_bytes = QT_BUFFER_CNT * EHCI_PAGE_SIZE; 452 /* 453 * However, if the input buffer is not page-aligned, the 454 * portion of the first page before the buffer start 455 * offset within that page is unusable. 456 */ 457 xfr_bytes -= (uint32_t)buf_ptr & (EHCI_PAGE_SIZE - 1); 458 /* 459 * In order to keep each packet within a qTD transfer, 460 * align the qTD transfer size to PKT_ALIGN. 461 */ 462 xfr_bytes &= ~(PKT_ALIGN - 1); 463 /* 464 * This transfer may be shorter than the available qTD 465 * transfer size that has just been computed. 466 */ 467 xfr_bytes = min(xfr_bytes, left_length); 468 469 /* 470 * Setup request qTD (3.5 in ehci-r10.pdf) 471 * 472 * qt_next ................ 03-00 H 473 * qt_altnext ............. 07-04 H 474 * qt_token ............... 0B-08 H 475 * 476 * [ buffer, buffer_hi ] loaded with "buffer". 477 */ 478 qtd[qtd_counter].qt_next = 479 cpu_to_hc32(QT_NEXT_TERMINATE); 480 qtd[qtd_counter].qt_altnext = 481 cpu_to_hc32(QT_NEXT_TERMINATE); 482 token = QT_TOKEN_DT(toggle) | 483 QT_TOKEN_TOTALBYTES(xfr_bytes) | 484 QT_TOKEN_IOC(req == NULL) | QT_TOKEN_CPAGE(0) | 485 QT_TOKEN_CERR(3) | 486 QT_TOKEN_PID(usb_pipein(pipe) ? 487 QT_TOKEN_PID_IN : QT_TOKEN_PID_OUT) | 488 QT_TOKEN_STATUS(QT_TOKEN_STATUS_ACTIVE); 489 qtd[qtd_counter].qt_token = cpu_to_hc32(token); 490 if (ehci_td_buffer(&qtd[qtd_counter], buf_ptr, 491 xfr_bytes)) { 492 printf("unable to construct DATA TD\n"); 493 goto fail; 494 } 495 /* Update previous qTD! */ 496 *tdp = cpu_to_hc32((uint32_t)&qtd[qtd_counter]); 497 tdp = &qtd[qtd_counter++].qt_next; 498 /* 499 * Data toggle has to be adjusted since the qTD transfer 500 * size is not always an even multiple of 501 * wMaxPacketSize. 502 */ 503 if ((xfr_bytes / maxpacket) & 1) 504 toggle ^= 1; 505 buf_ptr += xfr_bytes; 506 left_length -= xfr_bytes; 507 } while (left_length > 0); 508 } 509 510 if (req != NULL) { 511 /* 512 * Setup request qTD (3.5 in ehci-r10.pdf) 513 * 514 * qt_next ................ 03-00 H 515 * qt_altnext ............. 07-04 H 516 * qt_token ............... 0B-08 H 517 */ 518 qtd[qtd_counter].qt_next = cpu_to_hc32(QT_NEXT_TERMINATE); 519 qtd[qtd_counter].qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE); 520 token = QT_TOKEN_DT(1) | QT_TOKEN_TOTALBYTES(0) | 521 QT_TOKEN_IOC(1) | QT_TOKEN_CPAGE(0) | QT_TOKEN_CERR(3) | 522 QT_TOKEN_PID(usb_pipein(pipe) ? 523 QT_TOKEN_PID_OUT : QT_TOKEN_PID_IN) | 524 QT_TOKEN_STATUS(QT_TOKEN_STATUS_ACTIVE); 525 qtd[qtd_counter].qt_token = cpu_to_hc32(token); 526 /* Update previous qTD! */ 527 *tdp = cpu_to_hc32((uint32_t)&qtd[qtd_counter]); 528 tdp = &qtd[qtd_counter++].qt_next; 529 } 530 531 ctrl->qh_list.qh_link = cpu_to_hc32((uint32_t)qh | QH_LINK_TYPE_QH); 532 533 /* Flush dcache */ 534 flush_dcache_range((uint32_t)&ctrl->qh_list, 535 ALIGN_END_ADDR(struct QH, &ctrl->qh_list, 1)); 536 flush_dcache_range((uint32_t)qh, ALIGN_END_ADDR(struct QH, qh, 1)); 537 flush_dcache_range((uint32_t)qtd, 538 ALIGN_END_ADDR(struct qTD, qtd, qtd_count)); 539 540 /* Set async. queue head pointer. */ 541 ehci_writel(&ctrl->hcor->or_asynclistaddr, (uint32_t)&ctrl->qh_list); 542 543 usbsts = ehci_readl(&ctrl->hcor->or_usbsts); 544 ehci_writel(&ctrl->hcor->or_usbsts, (usbsts & 0x3f)); 545 546 /* Enable async. schedule. */ 547 cmd = ehci_readl(&ctrl->hcor->or_usbcmd); 548 cmd |= CMD_ASE; 549 ehci_writel(&ctrl->hcor->or_usbcmd, cmd); 550 551 ret = handshake((uint32_t *)&ctrl->hcor->or_usbsts, STS_ASS, STS_ASS, 552 100 * 1000); 553 if (ret < 0) { 554 printf("EHCI fail timeout STS_ASS set\n"); 555 goto fail; 556 } 557 558 /* Wait for TDs to be processed. */ 559 ts = get_timer(0); 560 vtd = &qtd[qtd_counter - 1]; 561 timeout = USB_TIMEOUT_MS(pipe); 562 do { 563 /* Invalidate dcache */ 564 invalidate_dcache_range((uint32_t)&ctrl->qh_list, 565 ALIGN_END_ADDR(struct QH, &ctrl->qh_list, 1)); 566 invalidate_dcache_range((uint32_t)qh, 567 ALIGN_END_ADDR(struct QH, qh, 1)); 568 invalidate_dcache_range((uint32_t)qtd, 569 ALIGN_END_ADDR(struct qTD, qtd, qtd_count)); 570 571 token = hc32_to_cpu(vtd->qt_token); 572 if (!(QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_ACTIVE)) 573 break; 574 WATCHDOG_RESET(); 575 } while (get_timer(ts) < timeout); 576 577 /* 578 * Invalidate the memory area occupied by buffer 579 * Don't try to fix the buffer alignment, if it isn't properly 580 * aligned it's upper layer's fault so let invalidate_dcache_range() 581 * vow about it. But we have to fix the length as it's actual 582 * transfer length and can be unaligned. This is potentially 583 * dangerous operation, it's responsibility of the calling 584 * code to make sure enough space is reserved. 585 */ 586 invalidate_dcache_range((uint32_t)buffer, 587 ALIGN((uint32_t)buffer + length, ARCH_DMA_MINALIGN)); 588 589 /* Check that the TD processing happened */ 590 if (QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_ACTIVE) 591 printf("EHCI timed out on TD - token=%#x\n", token); 592 593 /* Disable async schedule. */ 594 cmd = ehci_readl(&ctrl->hcor->or_usbcmd); 595 cmd &= ~CMD_ASE; 596 ehci_writel(&ctrl->hcor->or_usbcmd, cmd); 597 598 ret = handshake((uint32_t *)&ctrl->hcor->or_usbsts, STS_ASS, 0, 599 100 * 1000); 600 if (ret < 0) { 601 printf("EHCI fail timeout STS_ASS reset\n"); 602 goto fail; 603 } 604 605 token = hc32_to_cpu(qh->qh_overlay.qt_token); 606 if (!(QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_ACTIVE)) { 607 debug("TOKEN=%#x\n", token); 608 switch (QT_TOKEN_GET_STATUS(token) & 609 ~(QT_TOKEN_STATUS_SPLITXSTATE | QT_TOKEN_STATUS_PERR)) { 610 case 0: 611 toggle = QT_TOKEN_GET_DT(token); 612 usb_settoggle(dev, usb_pipeendpoint(pipe), 613 usb_pipeout(pipe), toggle); 614 dev->status = 0; 615 break; 616 case QT_TOKEN_STATUS_HALTED: 617 dev->status = USB_ST_STALLED; 618 break; 619 case QT_TOKEN_STATUS_ACTIVE | QT_TOKEN_STATUS_DATBUFERR: 620 case QT_TOKEN_STATUS_DATBUFERR: 621 dev->status = USB_ST_BUF_ERR; 622 break; 623 case QT_TOKEN_STATUS_HALTED | QT_TOKEN_STATUS_BABBLEDET: 624 case QT_TOKEN_STATUS_BABBLEDET: 625 dev->status = USB_ST_BABBLE_DET; 626 break; 627 default: 628 dev->status = USB_ST_CRC_ERR; 629 if (QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_HALTED) 630 dev->status |= USB_ST_STALLED; 631 break; 632 } 633 dev->act_len = length - QT_TOKEN_GET_TOTALBYTES(token); 634 } else { 635 dev->act_len = 0; 636 #ifndef CONFIG_USB_EHCI_FARADAY 637 debug("dev=%u, usbsts=%#x, p[1]=%#x, p[2]=%#x\n", 638 dev->devnum, ehci_readl(&ctrl->hcor->or_usbsts), 639 ehci_readl(&ctrl->hcor->or_portsc[0]), 640 ehci_readl(&ctrl->hcor->or_portsc[1])); 641 #endif 642 } 643 644 free(qtd); 645 return (dev->status != USB_ST_NOT_PROC) ? 0 : -1; 646 647 fail: 648 free(qtd); 649 return -1; 650 } 651 652 __weak uint32_t *ehci_get_portsc_register(struct ehci_hcor *hcor, int port) 653 { 654 if (port < 0 || port >= CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS) { 655 /* Printing the message would cause a scan failure! */ 656 debug("The request port(%u) is not configured\n", port); 657 return NULL; 658 } 659 660 return (uint32_t *)&hcor->or_portsc[port]; 661 } 662 663 int 664 ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer, 665 int length, struct devrequest *req) 666 { 667 uint8_t tmpbuf[4]; 668 u16 typeReq; 669 void *srcptr = NULL; 670 int len, srclen; 671 uint32_t reg; 672 uint32_t *status_reg; 673 int port = le16_to_cpu(req->index) & 0xff; 674 struct ehci_ctrl *ctrl = dev->controller; 675 676 srclen = 0; 677 678 debug("req=%u (%#x), type=%u (%#x), value=%u, index=%u\n", 679 req->request, req->request, 680 req->requesttype, req->requesttype, 681 le16_to_cpu(req->value), le16_to_cpu(req->index)); 682 683 typeReq = req->request | req->requesttype << 8; 684 685 switch (typeReq) { 686 case USB_REQ_GET_STATUS | ((USB_RT_PORT | USB_DIR_IN) << 8): 687 case USB_REQ_SET_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8): 688 case USB_REQ_CLEAR_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8): 689 status_reg = ehci_get_portsc_register(ctrl->hcor, port - 1); 690 if (!status_reg) 691 return -1; 692 break; 693 default: 694 status_reg = NULL; 695 break; 696 } 697 698 switch (typeReq) { 699 case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 700 switch (le16_to_cpu(req->value) >> 8) { 701 case USB_DT_DEVICE: 702 debug("USB_DT_DEVICE request\n"); 703 srcptr = &descriptor.device; 704 srclen = descriptor.device.bLength; 705 break; 706 case USB_DT_CONFIG: 707 debug("USB_DT_CONFIG config\n"); 708 srcptr = &descriptor.config; 709 srclen = descriptor.config.bLength + 710 descriptor.interface.bLength + 711 descriptor.endpoint.bLength; 712 break; 713 case USB_DT_STRING: 714 debug("USB_DT_STRING config\n"); 715 switch (le16_to_cpu(req->value) & 0xff) { 716 case 0: /* Language */ 717 srcptr = "\4\3\1\0"; 718 srclen = 4; 719 break; 720 case 1: /* Vendor */ 721 srcptr = "\16\3u\0-\0b\0o\0o\0t\0"; 722 srclen = 14; 723 break; 724 case 2: /* Product */ 725 srcptr = "\52\3E\0H\0C\0I\0 " 726 "\0H\0o\0s\0t\0 " 727 "\0C\0o\0n\0t\0r\0o\0l\0l\0e\0r\0"; 728 srclen = 42; 729 break; 730 default: 731 debug("unknown value DT_STRING %x\n", 732 le16_to_cpu(req->value)); 733 goto unknown; 734 } 735 break; 736 default: 737 debug("unknown value %x\n", le16_to_cpu(req->value)); 738 goto unknown; 739 } 740 break; 741 case USB_REQ_GET_DESCRIPTOR | ((USB_DIR_IN | USB_RT_HUB) << 8): 742 switch (le16_to_cpu(req->value) >> 8) { 743 case USB_DT_HUB: 744 debug("USB_DT_HUB config\n"); 745 srcptr = &descriptor.hub; 746 srclen = descriptor.hub.bLength; 747 break; 748 default: 749 debug("unknown value %x\n", le16_to_cpu(req->value)); 750 goto unknown; 751 } 752 break; 753 case USB_REQ_SET_ADDRESS | (USB_RECIP_DEVICE << 8): 754 debug("USB_REQ_SET_ADDRESS\n"); 755 ctrl->rootdev = le16_to_cpu(req->value); 756 break; 757 case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: 758 debug("USB_REQ_SET_CONFIGURATION\n"); 759 /* Nothing to do */ 760 break; 761 case USB_REQ_GET_STATUS | ((USB_DIR_IN | USB_RT_HUB) << 8): 762 tmpbuf[0] = 1; /* USB_STATUS_SELFPOWERED */ 763 tmpbuf[1] = 0; 764 srcptr = tmpbuf; 765 srclen = 2; 766 break; 767 case USB_REQ_GET_STATUS | ((USB_RT_PORT | USB_DIR_IN) << 8): 768 memset(tmpbuf, 0, 4); 769 reg = ehci_readl(status_reg); 770 if (reg & EHCI_PS_CS) 771 tmpbuf[0] |= USB_PORT_STAT_CONNECTION; 772 if (reg & EHCI_PS_PE) 773 tmpbuf[0] |= USB_PORT_STAT_ENABLE; 774 if (reg & EHCI_PS_SUSP) 775 tmpbuf[0] |= USB_PORT_STAT_SUSPEND; 776 if (reg & EHCI_PS_OCA) 777 tmpbuf[0] |= USB_PORT_STAT_OVERCURRENT; 778 if (reg & EHCI_PS_PR) 779 tmpbuf[0] |= USB_PORT_STAT_RESET; 780 if (reg & EHCI_PS_PP) 781 tmpbuf[1] |= USB_PORT_STAT_POWER >> 8; 782 783 if (ehci_is_TDI()) { 784 switch (ehci_get_port_speed(ctrl->hcor, reg)) { 785 case PORTSC_PSPD_FS: 786 break; 787 case PORTSC_PSPD_LS: 788 tmpbuf[1] |= USB_PORT_STAT_LOW_SPEED >> 8; 789 break; 790 case PORTSC_PSPD_HS: 791 default: 792 tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8; 793 break; 794 } 795 } else { 796 tmpbuf[1] |= USB_PORT_STAT_HIGH_SPEED >> 8; 797 } 798 799 if (reg & EHCI_PS_CSC) 800 tmpbuf[2] |= USB_PORT_STAT_C_CONNECTION; 801 if (reg & EHCI_PS_PEC) 802 tmpbuf[2] |= USB_PORT_STAT_C_ENABLE; 803 if (reg & EHCI_PS_OCC) 804 tmpbuf[2] |= USB_PORT_STAT_C_OVERCURRENT; 805 if (ctrl->portreset & (1 << port)) 806 tmpbuf[2] |= USB_PORT_STAT_C_RESET; 807 808 srcptr = tmpbuf; 809 srclen = 4; 810 break; 811 case USB_REQ_SET_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8): 812 reg = ehci_readl(status_reg); 813 reg &= ~EHCI_PS_CLEAR; 814 switch (le16_to_cpu(req->value)) { 815 case USB_PORT_FEAT_ENABLE: 816 reg |= EHCI_PS_PE; 817 ehci_writel(status_reg, reg); 818 break; 819 case USB_PORT_FEAT_POWER: 820 if (HCS_PPC(ehci_readl(&ctrl->hccr->cr_hcsparams))) { 821 reg |= EHCI_PS_PP; 822 ehci_writel(status_reg, reg); 823 } 824 break; 825 case USB_PORT_FEAT_RESET: 826 if ((reg & (EHCI_PS_PE | EHCI_PS_CS)) == EHCI_PS_CS && 827 !ehci_is_TDI() && 828 EHCI_PS_IS_LOWSPEED(reg)) { 829 /* Low speed device, give up ownership. */ 830 debug("port %d low speed --> companion\n", 831 port - 1); 832 reg |= EHCI_PS_PO; 833 ehci_writel(status_reg, reg); 834 break; 835 } else { 836 int ret; 837 838 reg |= EHCI_PS_PR; 839 reg &= ~EHCI_PS_PE; 840 ehci_writel(status_reg, reg); 841 /* 842 * caller must wait, then call GetPortStatus 843 * usb 2.0 specification say 50 ms resets on 844 * root 845 */ 846 ehci_powerup_fixup(status_reg, ®); 847 848 ehci_writel(status_reg, reg & ~EHCI_PS_PR); 849 /* 850 * A host controller must terminate the reset 851 * and stabilize the state of the port within 852 * 2 milliseconds 853 */ 854 ret = handshake(status_reg, EHCI_PS_PR, 0, 855 2 * 1000); 856 if (!ret) 857 ctrl->portreset |= 1 << port; 858 else 859 printf("port(%d) reset error\n", 860 port - 1); 861 } 862 break; 863 case USB_PORT_FEAT_TEST: 864 ehci_shutdown(ctrl); 865 reg &= ~(0xf << 16); 866 reg |= ((le16_to_cpu(req->index) >> 8) & 0xf) << 16; 867 ehci_writel(status_reg, reg); 868 break; 869 default: 870 debug("unknown feature %x\n", le16_to_cpu(req->value)); 871 goto unknown; 872 } 873 /* unblock posted writes */ 874 (void) ehci_readl(&ctrl->hcor->or_usbcmd); 875 break; 876 case USB_REQ_CLEAR_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8): 877 reg = ehci_readl(status_reg); 878 reg &= ~EHCI_PS_CLEAR; 879 switch (le16_to_cpu(req->value)) { 880 case USB_PORT_FEAT_ENABLE: 881 reg &= ~EHCI_PS_PE; 882 break; 883 case USB_PORT_FEAT_C_ENABLE: 884 reg |= EHCI_PS_PE; 885 break; 886 case USB_PORT_FEAT_POWER: 887 if (HCS_PPC(ehci_readl(&ctrl->hccr->cr_hcsparams))) 888 reg &= ~EHCI_PS_PP; 889 break; 890 case USB_PORT_FEAT_C_CONNECTION: 891 reg |= EHCI_PS_CSC; 892 break; 893 case USB_PORT_FEAT_OVER_CURRENT: 894 reg |= EHCI_PS_OCC; 895 break; 896 case USB_PORT_FEAT_C_RESET: 897 ctrl->portreset &= ~(1 << port); 898 break; 899 default: 900 debug("unknown feature %x\n", le16_to_cpu(req->value)); 901 goto unknown; 902 } 903 ehci_writel(status_reg, reg); 904 /* unblock posted write */ 905 (void) ehci_readl(&ctrl->hcor->or_usbcmd); 906 break; 907 default: 908 debug("Unknown request\n"); 909 goto unknown; 910 } 911 912 mdelay(1); 913 len = min3(srclen, (int)le16_to_cpu(req->length), length); 914 if (srcptr != NULL && len > 0) 915 memcpy(buffer, srcptr, len); 916 else 917 debug("Len is 0\n"); 918 919 dev->act_len = len; 920 dev->status = 0; 921 return 0; 922 923 unknown: 924 debug("requesttype=%x, request=%x, value=%x, index=%x, length=%x\n", 925 req->requesttype, req->request, le16_to_cpu(req->value), 926 le16_to_cpu(req->index), le16_to_cpu(req->length)); 927 928 dev->act_len = 0; 929 dev->status = USB_ST_STALLED; 930 return -1; 931 } 932 933 int usb_lowlevel_stop(int index) 934 { 935 ehci_shutdown(&ehcic[index]); 936 return ehci_hcd_stop(index); 937 } 938 939 int usb_lowlevel_init(int index, enum usb_init_type init, void **controller) 940 { 941 uint32_t reg; 942 uint32_t cmd; 943 struct QH *qh_list; 944 struct QH *periodic; 945 int i; 946 int rc; 947 948 rc = ehci_hcd_init(index, init, &ehcic[index].hccr, &ehcic[index].hcor); 949 if (rc) 950 return rc; 951 if (init == USB_INIT_DEVICE) 952 goto done; 953 954 /* EHCI spec section 4.1 */ 955 if (ehci_reset(index)) 956 return -1; 957 958 #if defined(CONFIG_EHCI_HCD_INIT_AFTER_RESET) 959 rc = ehci_hcd_init(index, init, &ehcic[index].hccr, &ehcic[index].hcor); 960 if (rc) 961 return rc; 962 #endif 963 /* Set the high address word (aka segment) for 64-bit controller */ 964 if (ehci_readl(&ehcic[index].hccr->cr_hccparams) & 1) 965 ehci_writel(&ehcic[index].hcor->or_ctrldssegment, 0); 966 967 qh_list = &ehcic[index].qh_list; 968 969 /* Set head of reclaim list */ 970 memset(qh_list, 0, sizeof(*qh_list)); 971 qh_list->qh_link = cpu_to_hc32((uint32_t)qh_list | QH_LINK_TYPE_QH); 972 qh_list->qh_endpt1 = cpu_to_hc32(QH_ENDPT1_H(1) | 973 QH_ENDPT1_EPS(USB_SPEED_HIGH)); 974 qh_list->qh_curtd = cpu_to_hc32(QT_NEXT_TERMINATE); 975 qh_list->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE); 976 qh_list->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE); 977 qh_list->qh_overlay.qt_token = 978 cpu_to_hc32(QT_TOKEN_STATUS(QT_TOKEN_STATUS_HALTED)); 979 980 flush_dcache_range((uint32_t)qh_list, 981 ALIGN_END_ADDR(struct QH, qh_list, 1)); 982 983 /* Set async. queue head pointer. */ 984 ehci_writel(&ehcic[index].hcor->or_asynclistaddr, (uint32_t)qh_list); 985 986 /* 987 * Set up periodic list 988 * Step 1: Parent QH for all periodic transfers. 989 */ 990 ehcic[index].periodic_schedules = 0; 991 periodic = &ehcic[index].periodic_queue; 992 memset(periodic, 0, sizeof(*periodic)); 993 periodic->qh_link = cpu_to_hc32(QH_LINK_TERMINATE); 994 periodic->qh_overlay.qt_next = cpu_to_hc32(QT_NEXT_TERMINATE); 995 periodic->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE); 996 997 flush_dcache_range((uint32_t)periodic, 998 ALIGN_END_ADDR(struct QH, periodic, 1)); 999 1000 /* 1001 * Step 2: Setup frame-list: Every microframe, USB tries the same list. 1002 * In particular, device specifications on polling frequency 1003 * are disregarded. Keyboards seem to send NAK/NYet reliably 1004 * when polled with an empty buffer. 1005 * 1006 * Split Transactions will be spread across microframes using 1007 * S-mask and C-mask. 1008 */ 1009 if (ehcic[index].periodic_list == NULL) 1010 ehcic[index].periodic_list = memalign(4096, 1024 * 4); 1011 1012 if (!ehcic[index].periodic_list) 1013 return -ENOMEM; 1014 for (i = 0; i < 1024; i++) { 1015 ehcic[index].periodic_list[i] = cpu_to_hc32((uint32_t)periodic 1016 | QH_LINK_TYPE_QH); 1017 } 1018 1019 flush_dcache_range((uint32_t)ehcic[index].periodic_list, 1020 ALIGN_END_ADDR(uint32_t, ehcic[index].periodic_list, 1021 1024)); 1022 1023 /* Set periodic list base address */ 1024 ehci_writel(&ehcic[index].hcor->or_periodiclistbase, 1025 (uint32_t)ehcic[index].periodic_list); 1026 1027 reg = ehci_readl(&ehcic[index].hccr->cr_hcsparams); 1028 descriptor.hub.bNbrPorts = HCS_N_PORTS(reg); 1029 debug("Register %x NbrPorts %d\n", reg, descriptor.hub.bNbrPorts); 1030 /* Port Indicators */ 1031 if (HCS_INDICATOR(reg)) 1032 put_unaligned(get_unaligned(&descriptor.hub.wHubCharacteristics) 1033 | 0x80, &descriptor.hub.wHubCharacteristics); 1034 /* Port Power Control */ 1035 if (HCS_PPC(reg)) 1036 put_unaligned(get_unaligned(&descriptor.hub.wHubCharacteristics) 1037 | 0x01, &descriptor.hub.wHubCharacteristics); 1038 1039 /* Start the host controller. */ 1040 cmd = ehci_readl(&ehcic[index].hcor->or_usbcmd); 1041 /* 1042 * Philips, Intel, and maybe others need CMD_RUN before the 1043 * root hub will detect new devices (why?); NEC doesn't 1044 */ 1045 cmd &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET); 1046 cmd |= CMD_RUN; 1047 ehci_writel(&ehcic[index].hcor->or_usbcmd, cmd); 1048 1049 #ifndef CONFIG_USB_EHCI_FARADAY 1050 /* take control over the ports */ 1051 cmd = ehci_readl(&ehcic[index].hcor->or_configflag); 1052 cmd |= FLAG_CF; 1053 ehci_writel(&ehcic[index].hcor->or_configflag, cmd); 1054 #endif 1055 1056 /* unblock posted write */ 1057 cmd = ehci_readl(&ehcic[index].hcor->or_usbcmd); 1058 mdelay(5); 1059 reg = HC_VERSION(ehci_readl(&ehcic[index].hccr->cr_capbase)); 1060 printf("USB EHCI %x.%02x\n", reg >> 8, reg & 0xff); 1061 1062 ehcic[index].rootdev = 0; 1063 done: 1064 *controller = &ehcic[index]; 1065 return 0; 1066 } 1067 1068 int 1069 submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer, 1070 int length) 1071 { 1072 1073 if (usb_pipetype(pipe) != PIPE_BULK) { 1074 debug("non-bulk pipe (type=%lu)", usb_pipetype(pipe)); 1075 return -1; 1076 } 1077 return ehci_submit_async(dev, pipe, buffer, length, NULL); 1078 } 1079 1080 int 1081 submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer, 1082 int length, struct devrequest *setup) 1083 { 1084 struct ehci_ctrl *ctrl = dev->controller; 1085 1086 if (usb_pipetype(pipe) != PIPE_CONTROL) { 1087 debug("non-control pipe (type=%lu)", usb_pipetype(pipe)); 1088 return -1; 1089 } 1090 1091 if (usb_pipedevice(pipe) == ctrl->rootdev) { 1092 if (!ctrl->rootdev) 1093 dev->speed = USB_SPEED_HIGH; 1094 return ehci_submit_root(dev, pipe, buffer, length, setup); 1095 } 1096 return ehci_submit_async(dev, pipe, buffer, length, setup); 1097 } 1098 1099 struct int_queue { 1100 int elementsize; 1101 struct QH *first; 1102 struct QH *current; 1103 struct QH *last; 1104 struct qTD *tds; 1105 }; 1106 1107 #define NEXT_QH(qh) (struct QH *)(hc32_to_cpu((qh)->qh_link) & ~0x1f) 1108 1109 static int 1110 enable_periodic(struct ehci_ctrl *ctrl) 1111 { 1112 uint32_t cmd; 1113 struct ehci_hcor *hcor = ctrl->hcor; 1114 int ret; 1115 1116 cmd = ehci_readl(&hcor->or_usbcmd); 1117 cmd |= CMD_PSE; 1118 ehci_writel(&hcor->or_usbcmd, cmd); 1119 1120 ret = handshake((uint32_t *)&hcor->or_usbsts, 1121 STS_PSS, STS_PSS, 100 * 1000); 1122 if (ret < 0) { 1123 printf("EHCI failed: timeout when enabling periodic list\n"); 1124 return -ETIMEDOUT; 1125 } 1126 udelay(1000); 1127 return 0; 1128 } 1129 1130 static int 1131 disable_periodic(struct ehci_ctrl *ctrl) 1132 { 1133 uint32_t cmd; 1134 struct ehci_hcor *hcor = ctrl->hcor; 1135 int ret; 1136 1137 cmd = ehci_readl(&hcor->or_usbcmd); 1138 cmd &= ~CMD_PSE; 1139 ehci_writel(&hcor->or_usbcmd, cmd); 1140 1141 ret = handshake((uint32_t *)&hcor->or_usbsts, 1142 STS_PSS, 0, 100 * 1000); 1143 if (ret < 0) { 1144 printf("EHCI failed: timeout when disabling periodic list\n"); 1145 return -ETIMEDOUT; 1146 } 1147 return 0; 1148 } 1149 1150 struct int_queue * 1151 create_int_queue(struct usb_device *dev, unsigned long pipe, int queuesize, 1152 int elementsize, void *buffer) 1153 { 1154 struct ehci_ctrl *ctrl = dev->controller; 1155 struct int_queue *result = NULL; 1156 int i; 1157 1158 /* 1159 * Interrupt transfers requiring several transactions are not supported 1160 * because bInterval is ignored. 1161 * 1162 * Also, ehci_submit_async() relies on wMaxPacketSize being a power of 2 1163 * <= PKT_ALIGN if several qTDs are required, while the USB 1164 * specification does not constrain this for interrupt transfers. That 1165 * means that ehci_submit_async() would support interrupt transfers 1166 * requiring several transactions only as long as the transfer size does 1167 * not require more than a single qTD. 1168 */ 1169 if (elementsize > usb_maxpacket(dev, pipe)) { 1170 printf("%s: xfers requiring several transactions are not supported.\n", 1171 __func__); 1172 return NULL; 1173 } 1174 1175 debug("Enter create_int_queue\n"); 1176 if (usb_pipetype(pipe) != PIPE_INTERRUPT) { 1177 debug("non-interrupt pipe (type=%lu)", usb_pipetype(pipe)); 1178 return NULL; 1179 } 1180 1181 /* limit to 4 full pages worth of data - 1182 * we can safely fit them in a single TD, 1183 * no matter the alignment 1184 */ 1185 if (elementsize >= 16384) { 1186 debug("too large elements for interrupt transfers\n"); 1187 return NULL; 1188 } 1189 1190 result = malloc(sizeof(*result)); 1191 if (!result) { 1192 debug("ehci intr queue: out of memory\n"); 1193 goto fail1; 1194 } 1195 result->elementsize = elementsize; 1196 result->first = memalign(USB_DMA_MINALIGN, 1197 sizeof(struct QH) * queuesize); 1198 if (!result->first) { 1199 debug("ehci intr queue: out of memory\n"); 1200 goto fail2; 1201 } 1202 result->current = result->first; 1203 result->last = result->first + queuesize - 1; 1204 result->tds = memalign(USB_DMA_MINALIGN, 1205 sizeof(struct qTD) * queuesize); 1206 if (!result->tds) { 1207 debug("ehci intr queue: out of memory\n"); 1208 goto fail3; 1209 } 1210 memset(result->first, 0, sizeof(struct QH) * queuesize); 1211 memset(result->tds, 0, sizeof(struct qTD) * queuesize); 1212 1213 for (i = 0; i < queuesize; i++) { 1214 struct QH *qh = result->first + i; 1215 struct qTD *td = result->tds + i; 1216 void **buf = &qh->buffer; 1217 1218 qh->qh_link = cpu_to_hc32((uint32_t)(qh+1) | QH_LINK_TYPE_QH); 1219 if (i == queuesize - 1) 1220 qh->qh_link = cpu_to_hc32(QH_LINK_TERMINATE); 1221 1222 qh->qh_overlay.qt_next = cpu_to_hc32((uint32_t)td); 1223 qh->qh_overlay.qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE); 1224 qh->qh_endpt1 = 1225 cpu_to_hc32((0 << 28) | /* No NAK reload (ehci 4.9) */ 1226 (usb_maxpacket(dev, pipe) << 16) | /* MPS */ 1227 (1 << 14) | 1228 QH_ENDPT1_EPS(ehci_encode_speed(dev->speed)) | 1229 (usb_pipeendpoint(pipe) << 8) | /* Endpoint Number */ 1230 (usb_pipedevice(pipe) << 0)); 1231 qh->qh_endpt2 = cpu_to_hc32((1 << 30) | /* 1 Tx per mframe */ 1232 (1 << 0)); /* S-mask: microframe 0 */ 1233 if (dev->speed == USB_SPEED_LOW || 1234 dev->speed == USB_SPEED_FULL) { 1235 /* C-mask: microframes 2-4 */ 1236 qh->qh_endpt2 |= cpu_to_hc32((0x1c << 8)); 1237 } 1238 ehci_update_endpt2_dev_n_port(dev, qh); 1239 1240 td->qt_next = cpu_to_hc32(QT_NEXT_TERMINATE); 1241 td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE); 1242 debug("communication direction is '%s'\n", 1243 usb_pipein(pipe) ? "in" : "out"); 1244 td->qt_token = cpu_to_hc32((elementsize << 16) | 1245 ((usb_pipein(pipe) ? 1 : 0) << 8) | /* IN/OUT token */ 1246 0x80); /* active */ 1247 td->qt_buffer[0] = 1248 cpu_to_hc32((uint32_t)buffer + i * elementsize); 1249 td->qt_buffer[1] = 1250 cpu_to_hc32((td->qt_buffer[0] + 0x1000) & ~0xfff); 1251 td->qt_buffer[2] = 1252 cpu_to_hc32((td->qt_buffer[0] + 0x2000) & ~0xfff); 1253 td->qt_buffer[3] = 1254 cpu_to_hc32((td->qt_buffer[0] + 0x3000) & ~0xfff); 1255 td->qt_buffer[4] = 1256 cpu_to_hc32((td->qt_buffer[0] + 0x4000) & ~0xfff); 1257 1258 *buf = buffer + i * elementsize; 1259 } 1260 1261 flush_dcache_range((uint32_t)buffer, 1262 ALIGN_END_ADDR(char, buffer, 1263 queuesize * elementsize)); 1264 flush_dcache_range((uint32_t)result->first, 1265 ALIGN_END_ADDR(struct QH, result->first, 1266 queuesize)); 1267 flush_dcache_range((uint32_t)result->tds, 1268 ALIGN_END_ADDR(struct qTD, result->tds, 1269 queuesize)); 1270 1271 if (ctrl->periodic_schedules > 0) { 1272 if (disable_periodic(ctrl) < 0) { 1273 debug("FATAL: periodic should never fail, but did"); 1274 goto fail3; 1275 } 1276 } 1277 1278 /* hook up to periodic list */ 1279 struct QH *list = &ctrl->periodic_queue; 1280 result->last->qh_link = list->qh_link; 1281 list->qh_link = cpu_to_hc32((uint32_t)result->first | QH_LINK_TYPE_QH); 1282 1283 flush_dcache_range((uint32_t)result->last, 1284 ALIGN_END_ADDR(struct QH, result->last, 1)); 1285 flush_dcache_range((uint32_t)list, 1286 ALIGN_END_ADDR(struct QH, list, 1)); 1287 1288 if (enable_periodic(ctrl) < 0) { 1289 debug("FATAL: periodic should never fail, but did"); 1290 goto fail3; 1291 } 1292 ctrl->periodic_schedules++; 1293 1294 debug("Exit create_int_queue\n"); 1295 return result; 1296 fail3: 1297 if (result->tds) 1298 free(result->tds); 1299 fail2: 1300 if (result->first) 1301 free(result->first); 1302 if (result) 1303 free(result); 1304 fail1: 1305 return NULL; 1306 } 1307 1308 void *poll_int_queue(struct usb_device *dev, struct int_queue *queue) 1309 { 1310 struct QH *cur = queue->current; 1311 struct qTD *cur_td; 1312 1313 /* depleted queue */ 1314 if (cur == NULL) { 1315 debug("Exit poll_int_queue with completed queue\n"); 1316 return NULL; 1317 } 1318 /* still active */ 1319 cur_td = &queue->tds[queue->current - queue->first]; 1320 invalidate_dcache_range((uint32_t)cur_td, 1321 ALIGN_END_ADDR(struct qTD, cur_td, 1)); 1322 if (QT_TOKEN_GET_STATUS(hc32_to_cpu(cur_td->qt_token)) & 1323 QT_TOKEN_STATUS_ACTIVE) { 1324 debug("Exit poll_int_queue with no completed intr transfer. token is %x\n", 1325 hc32_to_cpu(cur_td->qt_token)); 1326 return NULL; 1327 } 1328 if (!(cur->qh_link & QH_LINK_TERMINATE)) 1329 queue->current++; 1330 else 1331 queue->current = NULL; 1332 1333 invalidate_dcache_range((uint32_t)cur->buffer, 1334 ALIGN_END_ADDR(char, cur->buffer, 1335 queue->elementsize)); 1336 1337 debug("Exit poll_int_queue with completed intr transfer. token is %x at %p (first at %p)\n", 1338 hc32_to_cpu(cur_td->qt_token), cur, queue->first); 1339 return cur->buffer; 1340 } 1341 1342 /* Do not free buffers associated with QHs, they're owned by someone else */ 1343 int 1344 destroy_int_queue(struct usb_device *dev, struct int_queue *queue) 1345 { 1346 struct ehci_ctrl *ctrl = dev->controller; 1347 int result = -1; 1348 unsigned long timeout; 1349 1350 if (disable_periodic(ctrl) < 0) { 1351 debug("FATAL: periodic should never fail, but did"); 1352 goto out; 1353 } 1354 ctrl->periodic_schedules--; 1355 1356 struct QH *cur = &ctrl->periodic_queue; 1357 timeout = get_timer(0) + 500; /* abort after 500ms */ 1358 while (!(cur->qh_link & cpu_to_hc32(QH_LINK_TERMINATE))) { 1359 debug("considering %p, with qh_link %x\n", cur, cur->qh_link); 1360 if (NEXT_QH(cur) == queue->first) { 1361 debug("found candidate. removing from chain\n"); 1362 cur->qh_link = queue->last->qh_link; 1363 flush_dcache_range((uint32_t)cur, 1364 ALIGN_END_ADDR(struct QH, cur, 1)); 1365 result = 0; 1366 break; 1367 } 1368 cur = NEXT_QH(cur); 1369 if (get_timer(0) > timeout) { 1370 printf("Timeout destroying interrupt endpoint queue\n"); 1371 result = -1; 1372 goto out; 1373 } 1374 } 1375 1376 if (ctrl->periodic_schedules > 0) { 1377 result = enable_periodic(ctrl); 1378 if (result < 0) 1379 debug("FATAL: periodic should never fail, but did"); 1380 } 1381 1382 out: 1383 free(queue->tds); 1384 free(queue->first); 1385 free(queue); 1386 1387 return result; 1388 } 1389 1390 int 1391 submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer, 1392 int length, int interval) 1393 { 1394 void *backbuffer; 1395 struct int_queue *queue; 1396 unsigned long timeout; 1397 int result = 0, ret; 1398 1399 debug("dev=%p, pipe=%lu, buffer=%p, length=%d, interval=%d", 1400 dev, pipe, buffer, length, interval); 1401 1402 queue = create_int_queue(dev, pipe, 1, length, buffer); 1403 if (!queue) 1404 return -1; 1405 1406 timeout = get_timer(0) + USB_TIMEOUT_MS(pipe); 1407 while ((backbuffer = poll_int_queue(dev, queue)) == NULL) 1408 if (get_timer(0) > timeout) { 1409 printf("Timeout poll on interrupt endpoint\n"); 1410 result = -ETIMEDOUT; 1411 break; 1412 } 1413 1414 if (backbuffer != buffer) { 1415 debug("got wrong buffer back (%x instead of %x)\n", 1416 (uint32_t)backbuffer, (uint32_t)buffer); 1417 return -EINVAL; 1418 } 1419 1420 ret = destroy_int_queue(dev, queue); 1421 if (ret < 0) 1422 return ret; 1423 1424 /* everything worked out fine */ 1425 return result; 1426 } 1427